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1da177e4 LT |
1 | /* |
2 | * usb-host.c: ETRAX 100LX USB Host Controller Driver (HCD) | |
3 | * | |
4 | * Copyright (c) 2002, 2003 Axis Communications AB. | |
5 | */ | |
6 | ||
7 | #include <linux/config.h> | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/delay.h> | |
10 | #include <linux/ioport.h> | |
11 | #include <linux/sched.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/unistd.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/version.h> | |
18 | #include <linux/list.h> | |
19 | #include <linux/spinlock.h> | |
20 | ||
21 | #include <asm/uaccess.h> | |
22 | #include <asm/io.h> | |
23 | #include <asm/irq.h> | |
24 | #include <asm/dma.h> | |
25 | #include <asm/system.h> | |
26 | #include <asm/arch/svinto.h> | |
27 | ||
28 | #include <linux/usb.h> | |
29 | /* Ugly include because we don't live with the other host drivers. */ | |
30 | #include <../drivers/usb/core/hcd.h> | |
31 | #include <../drivers/usb/core/usb.h> | |
32 | ||
33 | #include "hc_crisv10.h" | |
34 | ||
35 | #define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR | |
36 | #define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR | |
37 | #define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR | |
38 | ||
39 | static const char *usb_hcd_version = "$Revision: 1.2 $"; | |
40 | ||
41 | #undef KERN_DEBUG | |
42 | #define KERN_DEBUG "" | |
43 | ||
44 | ||
45 | #undef USB_DEBUG_RH | |
46 | #undef USB_DEBUG_EPID | |
47 | #undef USB_DEBUG_SB | |
48 | #undef USB_DEBUG_DESC | |
49 | #undef USB_DEBUG_URB | |
50 | #undef USB_DEBUG_TRACE | |
51 | #undef USB_DEBUG_BULK | |
52 | #undef USB_DEBUG_CTRL | |
53 | #undef USB_DEBUG_INTR | |
54 | #undef USB_DEBUG_ISOC | |
55 | ||
56 | #ifdef USB_DEBUG_RH | |
57 | #define dbg_rh(format, arg...) printk(KERN_DEBUG __FILE__ ": (RH) " format "\n" , ## arg) | |
58 | #else | |
59 | #define dbg_rh(format, arg...) do {} while (0) | |
60 | #endif | |
61 | ||
62 | #ifdef USB_DEBUG_EPID | |
63 | #define dbg_epid(format, arg...) printk(KERN_DEBUG __FILE__ ": (EPID) " format "\n" , ## arg) | |
64 | #else | |
65 | #define dbg_epid(format, arg...) do {} while (0) | |
66 | #endif | |
67 | ||
68 | #ifdef USB_DEBUG_SB | |
69 | #define dbg_sb(format, arg...) printk(KERN_DEBUG __FILE__ ": (SB) " format "\n" , ## arg) | |
70 | #else | |
71 | #define dbg_sb(format, arg...) do {} while (0) | |
72 | #endif | |
73 | ||
74 | #ifdef USB_DEBUG_CTRL | |
75 | #define dbg_ctrl(format, arg...) printk(KERN_DEBUG __FILE__ ": (CTRL) " format "\n" , ## arg) | |
76 | #else | |
77 | #define dbg_ctrl(format, arg...) do {} while (0) | |
78 | #endif | |
79 | ||
80 | #ifdef USB_DEBUG_BULK | |
81 | #define dbg_bulk(format, arg...) printk(KERN_DEBUG __FILE__ ": (BULK) " format "\n" , ## arg) | |
82 | #else | |
83 | #define dbg_bulk(format, arg...) do {} while (0) | |
84 | #endif | |
85 | ||
86 | #ifdef USB_DEBUG_INTR | |
87 | #define dbg_intr(format, arg...) printk(KERN_DEBUG __FILE__ ": (INTR) " format "\n" , ## arg) | |
88 | #else | |
89 | #define dbg_intr(format, arg...) do {} while (0) | |
90 | #endif | |
91 | ||
92 | #ifdef USB_DEBUG_ISOC | |
93 | #define dbg_isoc(format, arg...) printk(KERN_DEBUG __FILE__ ": (ISOC) " format "\n" , ## arg) | |
94 | #else | |
95 | #define dbg_isoc(format, arg...) do {} while (0) | |
96 | #endif | |
97 | ||
98 | #ifdef USB_DEBUG_TRACE | |
99 | #define DBFENTER (printk(": Entering: %s\n", __FUNCTION__)) | |
100 | #define DBFEXIT (printk(": Exiting: %s\n", __FUNCTION__)) | |
101 | #else | |
102 | #define DBFENTER do {} while (0) | |
103 | #define DBFEXIT do {} while (0) | |
104 | #endif | |
105 | ||
106 | #define usb_pipeslow(pipe) (((pipe) >> 26) & 1) | |
107 | ||
108 | /*------------------------------------------------------------------- | |
109 | Virtual Root Hub | |
110 | -------------------------------------------------------------------*/ | |
111 | ||
112 | static __u8 root_hub_dev_des[] = | |
113 | { | |
114 | 0x12, /* __u8 bLength; */ | |
115 | 0x01, /* __u8 bDescriptorType; Device */ | |
116 | 0x00, /* __le16 bcdUSB; v1.0 */ | |
117 | 0x01, | |
118 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
119 | 0x00, /* __u8 bDeviceSubClass; */ | |
120 | 0x00, /* __u8 bDeviceProtocol; */ | |
121 | 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */ | |
122 | 0x00, /* __le16 idVendor; */ | |
123 | 0x00, | |
124 | 0x00, /* __le16 idProduct; */ | |
125 | 0x00, | |
126 | 0x00, /* __le16 bcdDevice; */ | |
127 | 0x00, | |
128 | 0x00, /* __u8 iManufacturer; */ | |
129 | 0x02, /* __u8 iProduct; */ | |
130 | 0x01, /* __u8 iSerialNumber; */ | |
131 | 0x01 /* __u8 bNumConfigurations; */ | |
132 | }; | |
133 | ||
134 | /* Configuration descriptor */ | |
135 | static __u8 root_hub_config_des[] = | |
136 | { | |
137 | 0x09, /* __u8 bLength; */ | |
138 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
139 | 0x19, /* __le16 wTotalLength; */ | |
140 | 0x00, | |
141 | 0x01, /* __u8 bNumInterfaces; */ | |
142 | 0x01, /* __u8 bConfigurationValue; */ | |
143 | 0x00, /* __u8 iConfiguration; */ | |
144 | 0x40, /* __u8 bmAttributes; Bit 7: Bus-powered */ | |
145 | 0x00, /* __u8 MaxPower; */ | |
146 | ||
147 | /* interface */ | |
148 | 0x09, /* __u8 if_bLength; */ | |
149 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
150 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
151 | 0x00, /* __u8 if_bAlternateSetting; */ | |
152 | 0x01, /* __u8 if_bNumEndpoints; */ | |
153 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
154 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
155 | 0x00, /* __u8 if_bInterfaceProtocol; */ | |
156 | 0x00, /* __u8 if_iInterface; */ | |
157 | ||
158 | /* endpoint */ | |
159 | 0x07, /* __u8 ep_bLength; */ | |
160 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
161 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
162 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
163 | 0x08, /* __le16 ep_wMaxPacketSize; 8 Bytes */ | |
164 | 0x00, | |
165 | 0xff /* __u8 ep_bInterval; 255 ms */ | |
166 | }; | |
167 | ||
168 | static __u8 root_hub_hub_des[] = | |
169 | { | |
170 | 0x09, /* __u8 bLength; */ | |
171 | 0x29, /* __u8 bDescriptorType; Hub-descriptor */ | |
172 | 0x02, /* __u8 bNbrPorts; */ | |
173 | 0x00, /* __u16 wHubCharacteristics; */ | |
174 | 0x00, | |
175 | 0x01, /* __u8 bPwrOn2pwrGood; 2ms */ | |
176 | 0x00, /* __u8 bHubContrCurrent; 0 mA */ | |
177 | 0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */ | |
178 | 0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */ | |
179 | }; | |
180 | ||
181 | static struct timer_list bulk_start_timer = TIMER_INITIALIZER(NULL, 0, 0); | |
182 | static struct timer_list bulk_eot_timer = TIMER_INITIALIZER(NULL, 0, 0); | |
183 | ||
184 | /* We want the start timer to expire before the eot timer, because the former might start | |
185 | traffic, thus making it unnecessary for the latter to time out. */ | |
186 | #define BULK_START_TIMER_INTERVAL (HZ/10) /* 100 ms */ | |
187 | #define BULK_EOT_TIMER_INTERVAL (HZ/10+2) /* 120 ms */ | |
188 | ||
189 | #define OK(x) len = (x); dbg_rh("OK(%d): line: %d", x, __LINE__); break | |
190 | #define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \ | |
191 | {panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);} | |
192 | ||
193 | #define SLAB_FLAG (in_interrupt() ? SLAB_ATOMIC : SLAB_KERNEL) | |
194 | #define KMALLOC_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL) | |
195 | ||
196 | /* Most helpful debugging aid */ | |
197 | #define assert(expr) ((void) ((expr) ? 0 : (err("assert failed at line %d",__LINE__)))) | |
198 | ||
199 | /* Alternative assert define which stops after a failed assert. */ | |
200 | /* | |
201 | #define assert(expr) \ | |
202 | { \ | |
203 | if (!(expr)) { \ | |
204 | err("assert failed at line %d",__LINE__); \ | |
205 | while (1); \ | |
206 | } \ | |
207 | } | |
208 | */ | |
209 | ||
210 | ||
211 | /* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it dynamically? | |
212 | To adjust it dynamically we would have to get an interrupt when we reach the end | |
213 | of the rx descriptor list, or when we get close to the end, and then allocate more | |
214 | descriptors. */ | |
215 | ||
216 | #define NBR_OF_RX_DESC 512 | |
217 | #define RX_DESC_BUF_SIZE 1024 | |
218 | #define RX_BUF_SIZE (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE) | |
219 | ||
220 | /* The number of epids is, among other things, used for pre-allocating | |
221 | ctrl, bulk and isoc EP descriptors (one for each epid). | |
222 | Assumed to be > 1 when initiating the DMA lists. */ | |
223 | #define NBR_OF_EPIDS 32 | |
224 | ||
225 | /* Support interrupt traffic intervals up to 128 ms. */ | |
226 | #define MAX_INTR_INTERVAL 128 | |
227 | ||
228 | /* If periodic traffic (intr or isoc) is to be used, then one entry in the EP table | |
229 | must be "invalid". By this we mean that we shouldn't care about epid attentions | |
230 | for this epid, or at least handle them differently from epid attentions for "valid" | |
231 | epids. This define determines which one to use (don't change it). */ | |
232 | #define INVALID_EPID 31 | |
233 | /* A special epid for the bulk dummys. */ | |
234 | #define DUMMY_EPID 30 | |
235 | ||
236 | /* This is just a software cache for the valid entries in R_USB_EPT_DATA. */ | |
237 | static __u32 epid_usage_bitmask; | |
238 | ||
239 | /* A bitfield to keep information on in/out traffic is needed to uniquely identify | |
240 | an endpoint on a device, since the most significant bit which indicates traffic | |
241 | direction is lacking in the ep_id field (ETRAX epids can handle both in and | |
242 | out traffic on endpoints that are otherwise identical). The USB framework, however, | |
243 | relies on them to be handled separately. For example, bulk IN and OUT urbs cannot | |
244 | be queued in the same list, since they would block each other. */ | |
245 | static __u32 epid_out_traffic; | |
246 | ||
247 | /* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line. | |
248 | Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be cache aligned. */ | |
249 | static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32))); | |
250 | static volatile USB_IN_Desc_t RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4))); | |
251 | ||
252 | /* Pointers into RxDescList. */ | |
253 | static volatile USB_IN_Desc_t *myNextRxDesc; | |
254 | static volatile USB_IN_Desc_t *myLastRxDesc; | |
255 | static volatile USB_IN_Desc_t *myPrevRxDesc; | |
256 | ||
257 | /* EP descriptors must be 32-bit aligned. */ | |
258 | static volatile USB_EP_Desc_t TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); | |
259 | static volatile USB_EP_Desc_t TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); | |
260 | /* After each enabled bulk EP (IN or OUT) we put two disabled EP descriptors with the eol flag set, | |
261 | causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which | |
262 | gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the | |
263 | EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors | |
264 | in each frame. */ | |
265 | static volatile USB_EP_Desc_t TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4))); | |
266 | ||
267 | static volatile USB_EP_Desc_t TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); | |
268 | static volatile USB_SB_Desc_t TxIsocSB_zout __attribute__ ((aligned (4))); | |
269 | ||
270 | static volatile USB_EP_Desc_t TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4))); | |
271 | static volatile USB_SB_Desc_t TxIntrSB_zout __attribute__ ((aligned (4))); | |
272 | ||
273 | /* A zout transfer makes a memory access at the address of its buf pointer, which means that setting | |
274 | this buf pointer to 0 will cause an access to the flash. In addition to this, setting sw_len to 0 | |
275 | results in a 16/32 bytes (depending on DMA burst size) transfer. Instead, we set it to 1, and point | |
276 | it to this buffer. */ | |
277 | static int zout_buffer[4] __attribute__ ((aligned (4))); | |
278 | ||
279 | /* Cache for allocating new EP and SB descriptors. */ | |
280 | static kmem_cache_t *usb_desc_cache; | |
281 | ||
282 | /* Cache for the registers allocated in the top half. */ | |
283 | static kmem_cache_t *top_half_reg_cache; | |
284 | ||
285 | /* Cache for the data allocated in the isoc descr top half. */ | |
286 | static kmem_cache_t *isoc_compl_cache; | |
287 | ||
288 | static struct usb_bus *etrax_usb_bus; | |
289 | ||
290 | /* This is a circular (double-linked) list of the active urbs for each epid. | |
291 | The head is never removed, and new urbs are linked onto the list as | |
292 | urb_entry_t elements. Don't reference urb_list directly; use the wrapper | |
293 | functions instead. Note that working with these lists might require spinlock | |
294 | protection. */ | |
295 | static struct list_head urb_list[NBR_OF_EPIDS]; | |
296 | ||
297 | /* Read about the need and usage of this lock in submit_ctrl_urb. */ | |
298 | static spinlock_t urb_list_lock; | |
299 | ||
300 | /* Used when unlinking asynchronously. */ | |
301 | static struct list_head urb_unlink_list; | |
302 | ||
303 | /* for returning string descriptors in UTF-16LE */ | |
304 | static int ascii2utf (char *ascii, __u8 *utf, int utfmax) | |
305 | { | |
306 | int retval; | |
307 | ||
308 | for (retval = 0; *ascii && utfmax > 1; utfmax -= 2, retval += 2) { | |
309 | *utf++ = *ascii++ & 0x7f; | |
310 | *utf++ = 0; | |
311 | } | |
312 | return retval; | |
313 | } | |
314 | ||
315 | static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len) | |
316 | { | |
317 | char buf [30]; | |
318 | ||
319 | // assert (len > (2 * (sizeof (buf) + 1))); | |
320 | // assert (strlen (type) <= 8); | |
321 | ||
322 | // language ids | |
323 | if (id == 0) { | |
324 | *data++ = 4; *data++ = 3; /* 4 bytes data */ | |
325 | *data++ = 0; *data++ = 0; /* some language id */ | |
326 | return 4; | |
327 | ||
328 | // serial number | |
329 | } else if (id == 1) { | |
330 | sprintf (buf, "%x", serial); | |
331 | ||
332 | // product description | |
333 | } else if (id == 2) { | |
334 | sprintf (buf, "USB %s Root Hub", type); | |
335 | ||
336 | // id 3 == vendor description | |
337 | ||
338 | // unsupported IDs --> "stall" | |
339 | } else | |
340 | return 0; | |
341 | ||
342 | data [0] = 2 + ascii2utf (buf, data + 2, len - 2); | |
343 | data [1] = 3; | |
344 | return data [0]; | |
345 | } | |
346 | ||
347 | /* Wrappers around the list functions (include/linux/list.h). */ | |
348 | ||
349 | static inline int urb_list_empty(int epid) | |
350 | { | |
351 | return list_empty(&urb_list[epid]); | |
352 | } | |
353 | ||
354 | /* Returns first urb for this epid, or NULL if list is empty. */ | |
355 | static inline struct urb *urb_list_first(int epid) | |
356 | { | |
357 | struct urb *first_urb = 0; | |
358 | ||
359 | if (!urb_list_empty(epid)) { | |
360 | /* Get the first urb (i.e. head->next). */ | |
361 | urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list); | |
362 | first_urb = urb_entry->urb; | |
363 | } | |
364 | return first_urb; | |
365 | } | |
366 | ||
367 | /* Adds an urb_entry last in the list for this epid. */ | |
368 | static inline void urb_list_add(struct urb *urb, int epid) | |
369 | { | |
370 | urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), KMALLOC_FLAG); | |
371 | assert(urb_entry); | |
372 | ||
373 | urb_entry->urb = urb; | |
374 | list_add_tail(&urb_entry->list, &urb_list[epid]); | |
375 | } | |
376 | ||
377 | /* Search through the list for an element that contains this urb. (The list | |
378 | is expected to be short and the one we are about to delete will often be | |
379 | the first in the list.) */ | |
380 | static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) | |
381 | { | |
382 | struct list_head *entry; | |
383 | struct list_head *tmp; | |
384 | urb_entry_t *urb_entry; | |
385 | ||
386 | list_for_each_safe(entry, tmp, &urb_list[epid]) { | |
387 | urb_entry = list_entry(entry, urb_entry_t, list); | |
388 | assert(urb_entry); | |
389 | assert(urb_entry->urb); | |
390 | ||
391 | if (urb_entry->urb == urb) { | |
392 | return urb_entry; | |
393 | } | |
394 | } | |
395 | return 0; | |
396 | } | |
397 | ||
398 | /* Delete an urb from the list. */ | |
399 | static inline void urb_list_del(struct urb *urb, int epid) | |
400 | { | |
401 | urb_entry_t *urb_entry = __urb_list_entry(urb, epid); | |
402 | assert(urb_entry); | |
403 | ||
404 | /* Delete entry and free. */ | |
405 | list_del(&urb_entry->list); | |
406 | kfree(urb_entry); | |
407 | } | |
408 | ||
409 | /* Move an urb to the end of the list. */ | |
410 | static inline void urb_list_move_last(struct urb *urb, int epid) | |
411 | { | |
412 | urb_entry_t *urb_entry = __urb_list_entry(urb, epid); | |
413 | assert(urb_entry); | |
414 | ||
415 | list_del(&urb_entry->list); | |
416 | list_add_tail(&urb_entry->list, &urb_list[epid]); | |
417 | } | |
418 | ||
419 | /* Get the next urb in the list. */ | |
420 | static inline struct urb *urb_list_next(struct urb *urb, int epid) | |
421 | { | |
422 | urb_entry_t *urb_entry = __urb_list_entry(urb, epid); | |
423 | ||
424 | assert(urb_entry); | |
425 | ||
426 | if (urb_entry->list.next != &urb_list[epid]) { | |
427 | struct list_head *elem = urb_entry->list.next; | |
428 | urb_entry = list_entry(elem, urb_entry_t, list); | |
429 | return urb_entry->urb; | |
430 | } else { | |
431 | return NULL; | |
432 | } | |
433 | } | |
434 | ||
435 | ||
436 | ||
437 | /* For debug purposes only. */ | |
438 | static inline void urb_list_dump(int epid) | |
439 | { | |
440 | struct list_head *entry; | |
441 | struct list_head *tmp; | |
442 | urb_entry_t *urb_entry; | |
443 | int i = 0; | |
444 | ||
445 | info("Dumping urb list for epid %d", epid); | |
446 | ||
447 | list_for_each_safe(entry, tmp, &urb_list[epid]) { | |
448 | urb_entry = list_entry(entry, urb_entry_t, list); | |
449 | info(" entry %d, urb = 0x%lx", i, (unsigned long)urb_entry->urb); | |
450 | } | |
451 | } | |
452 | ||
453 | static void init_rx_buffers(void); | |
454 | static int etrax_rh_unlink_urb(struct urb *urb); | |
455 | static void etrax_rh_send_irq(struct urb *urb); | |
456 | static void etrax_rh_init_int_timer(struct urb *urb); | |
457 | static void etrax_rh_int_timer_do(unsigned long ptr); | |
458 | ||
459 | static int etrax_usb_setup_epid(struct urb *urb); | |
460 | static int etrax_usb_lookup_epid(struct urb *urb); | |
461 | static int etrax_usb_allocate_epid(void); | |
462 | static void etrax_usb_free_epid(int epid); | |
463 | ||
464 | static int etrax_remove_from_sb_list(struct urb *urb); | |
465 | ||
466 | static void* etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size, int mem_flags, dma_addr_t *dma); | |
467 | static void etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma); | |
468 | ||
469 | static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid); | |
470 | static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid); | |
471 | static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid); | |
472 | static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid); | |
473 | ||
474 | static int etrax_usb_submit_bulk_urb(struct urb *urb); | |
475 | static int etrax_usb_submit_ctrl_urb(struct urb *urb); | |
476 | static int etrax_usb_submit_intr_urb(struct urb *urb); | |
477 | static int etrax_usb_submit_isoc_urb(struct urb *urb); | |
478 | ||
479 | static int etrax_usb_submit_urb(struct urb *urb, int mem_flags); | |
480 | static int etrax_usb_unlink_urb(struct urb *urb, int status); | |
481 | static int etrax_usb_get_frame_number(struct usb_device *usb_dev); | |
482 | ||
483 | static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc, struct pt_regs *regs); | |
484 | static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc, struct pt_regs *regs); | |
485 | static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc, struct pt_regs *regs); | |
486 | static void etrax_usb_hc_interrupt_bottom_half(void *data); | |
487 | ||
488 | static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data); | |
489 | ||
490 | ||
491 | /* The following is a list of interrupt handlers for the host controller interrupts we use. | |
492 | They are called from etrax_usb_hc_interrupt_bottom_half. */ | |
493 | static void etrax_usb_hc_isoc_eof_interrupt(void); | |
494 | static void etrax_usb_hc_bulk_eot_interrupt(int timer_induced); | |
495 | static void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg); | |
496 | static void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg); | |
497 | static void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg); | |
498 | ||
499 | static int etrax_rh_submit_urb (struct urb *urb); | |
500 | ||
501 | /* Forward declaration needed because they are used in the rx interrupt routine. */ | |
502 | static void etrax_usb_complete_urb(struct urb *urb, int status); | |
503 | static void etrax_usb_complete_bulk_urb(struct urb *urb, int status); | |
504 | static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status); | |
505 | static void etrax_usb_complete_intr_urb(struct urb *urb, int status); | |
506 | static void etrax_usb_complete_isoc_urb(struct urb *urb, int status); | |
507 | ||
508 | static int etrax_usb_hc_init(void); | |
509 | static void etrax_usb_hc_cleanup(void); | |
510 | ||
511 | static struct usb_operations etrax_usb_device_operations = | |
512 | { | |
513 | .get_frame_number = etrax_usb_get_frame_number, | |
514 | .submit_urb = etrax_usb_submit_urb, | |
515 | .unlink_urb = etrax_usb_unlink_urb, | |
516 | .buffer_alloc = etrax_usb_buffer_alloc, | |
517 | .buffer_free = etrax_usb_buffer_free | |
518 | }; | |
519 | ||
520 | /* Note that these functions are always available in their "__" variants, for use in | |
521 | error situations. The "__" missing variants are controlled by the USB_DEBUG_DESC/ | |
522 | USB_DEBUG_URB macros. */ | |
523 | static void __dump_urb(struct urb* purb) | |
524 | { | |
525 | printk("\nurb :0x%08lx\n", (unsigned long)purb); | |
526 | printk("dev :0x%08lx\n", (unsigned long)purb->dev); | |
527 | printk("pipe :0x%08x\n", purb->pipe); | |
528 | printk("status :%d\n", purb->status); | |
529 | printk("transfer_flags :0x%08x\n", purb->transfer_flags); | |
530 | printk("transfer_buffer :0x%08lx\n", (unsigned long)purb->transfer_buffer); | |
531 | printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length); | |
532 | printk("actual_length :%d\n", purb->actual_length); | |
533 | printk("setup_packet :0x%08lx\n", (unsigned long)purb->setup_packet); | |
534 | printk("start_frame :%d\n", purb->start_frame); | |
535 | printk("number_of_packets :%d\n", purb->number_of_packets); | |
536 | printk("interval :%d\n", purb->interval); | |
537 | printk("error_count :%d\n", purb->error_count); | |
538 | printk("context :0x%08lx\n", (unsigned long)purb->context); | |
539 | printk("complete :0x%08lx\n\n", (unsigned long)purb->complete); | |
540 | } | |
541 | ||
542 | static void __dump_in_desc(volatile USB_IN_Desc_t *in) | |
543 | { | |
544 | printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in); | |
545 | printk(" sw_len : 0x%04x (%d)\n", in->sw_len, in->sw_len); | |
546 | printk(" command : 0x%04x\n", in->command); | |
547 | printk(" next : 0x%08lx\n", in->next); | |
548 | printk(" buf : 0x%08lx\n", in->buf); | |
549 | printk(" hw_len : 0x%04x (%d)\n", in->hw_len, in->hw_len); | |
550 | printk(" status : 0x%04x\n\n", in->status); | |
551 | } | |
552 | ||
553 | static void __dump_sb_desc(volatile USB_SB_Desc_t *sb) | |
554 | { | |
555 | char tt = (sb->command & 0x30) >> 4; | |
556 | char *tt_string; | |
557 | ||
558 | switch (tt) { | |
559 | case 0: | |
560 | tt_string = "zout"; | |
561 | break; | |
562 | case 1: | |
563 | tt_string = "in"; | |
564 | break; | |
565 | case 2: | |
566 | tt_string = "out"; | |
567 | break; | |
568 | case 3: | |
569 | tt_string = "setup"; | |
570 | break; | |
571 | default: | |
572 | tt_string = "unknown (weird)"; | |
573 | } | |
574 | ||
575 | printk("\n USB_SB_Desc at 0x%08lx\n", (unsigned long)sb); | |
576 | printk(" command : 0x%04x\n", sb->command); | |
577 | printk(" rem : %d\n", (sb->command & 0x3f00) >> 8); | |
578 | printk(" full : %d\n", (sb->command & 0x40) >> 6); | |
579 | printk(" tt : %d (%s)\n", tt, tt_string); | |
580 | printk(" intr : %d\n", (sb->command & 0x8) >> 3); | |
581 | printk(" eot : %d\n", (sb->command & 0x2) >> 1); | |
582 | printk(" eol : %d\n", sb->command & 0x1); | |
583 | printk(" sw_len : 0x%04x (%d)\n", sb->sw_len, sb->sw_len); | |
584 | printk(" next : 0x%08lx\n", sb->next); | |
585 | printk(" buf : 0x%08lx\n\n", sb->buf); | |
586 | } | |
587 | ||
588 | ||
589 | static void __dump_ep_desc(volatile USB_EP_Desc_t *ep) | |
590 | { | |
591 | printk("\nUSB_EP_Desc at 0x%08lx\n", (unsigned long)ep); | |
592 | printk(" command : 0x%04x\n", ep->command); | |
593 | printk(" ep_id : %d\n", (ep->command & 0x1f00) >> 8); | |
594 | printk(" enable : %d\n", (ep->command & 0x10) >> 4); | |
595 | printk(" intr : %d\n", (ep->command & 0x8) >> 3); | |
596 | printk(" eof : %d\n", (ep->command & 0x2) >> 1); | |
597 | printk(" eol : %d\n", ep->command & 0x1); | |
598 | printk(" hw_len : 0x%04x (%d)\n", ep->hw_len, ep->hw_len); | |
599 | printk(" next : 0x%08lx\n", ep->next); | |
600 | printk(" sub : 0x%08lx\n\n", ep->sub); | |
601 | } | |
602 | ||
603 | static inline void __dump_ep_list(int pipe_type) | |
604 | { | |
605 | volatile USB_EP_Desc_t *ep; | |
606 | volatile USB_EP_Desc_t *first_ep; | |
607 | volatile USB_SB_Desc_t *sb; | |
608 | ||
609 | switch (pipe_type) | |
610 | { | |
611 | case PIPE_BULK: | |
612 | first_ep = &TxBulkEPList[0]; | |
613 | break; | |
614 | case PIPE_CONTROL: | |
615 | first_ep = &TxCtrlEPList[0]; | |
616 | break; | |
617 | case PIPE_INTERRUPT: | |
618 | first_ep = &TxIntrEPList[0]; | |
619 | break; | |
620 | case PIPE_ISOCHRONOUS: | |
621 | first_ep = &TxIsocEPList[0]; | |
622 | break; | |
623 | default: | |
624 | warn("Cannot dump unknown traffic type"); | |
625 | return; | |
626 | } | |
627 | ep = first_ep; | |
628 | ||
629 | printk("\n\nDumping EP list...\n\n"); | |
630 | ||
631 | do { | |
632 | __dump_ep_desc(ep); | |
633 | /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */ | |
634 | sb = ep->sub ? phys_to_virt(ep->sub) : 0; | |
635 | while (sb) { | |
636 | __dump_sb_desc(sb); | |
637 | sb = sb->next ? phys_to_virt(sb->next) : 0; | |
638 | } | |
639 | ep = (volatile USB_EP_Desc_t *)(phys_to_virt(ep->next)); | |
640 | ||
641 | } while (ep != first_ep); | |
642 | } | |
643 | ||
644 | static inline void __dump_ept_data(int epid) | |
645 | { | |
646 | unsigned long flags; | |
647 | __u32 r_usb_ept_data; | |
648 | ||
649 | if (epid < 0 || epid > 31) { | |
650 | printk("Cannot dump ept data for invalid epid %d\n", epid); | |
651 | return; | |
652 | } | |
653 | ||
654 | save_flags(flags); | |
655 | cli(); | |
656 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
657 | nop(); | |
658 | r_usb_ept_data = *R_USB_EPT_DATA; | |
659 | restore_flags(flags); | |
660 | ||
661 | printk("\nR_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid); | |
662 | if (r_usb_ept_data == 0) { | |
663 | /* No need for more detailed printing. */ | |
664 | return; | |
665 | } | |
666 | printk(" valid : %d\n", (r_usb_ept_data & 0x80000000) >> 31); | |
667 | printk(" hold : %d\n", (r_usb_ept_data & 0x40000000) >> 30); | |
668 | printk(" error_count_in : %d\n", (r_usb_ept_data & 0x30000000) >> 28); | |
669 | printk(" t_in : %d\n", (r_usb_ept_data & 0x08000000) >> 27); | |
670 | printk(" low_speed : %d\n", (r_usb_ept_data & 0x04000000) >> 26); | |
671 | printk(" port : %d\n", (r_usb_ept_data & 0x03000000) >> 24); | |
672 | printk(" error_code : %d\n", (r_usb_ept_data & 0x00c00000) >> 22); | |
673 | printk(" t_out : %d\n", (r_usb_ept_data & 0x00200000) >> 21); | |
674 | printk(" error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19); | |
675 | printk(" max_len : %d\n", (r_usb_ept_data & 0x0003f800) >> 11); | |
676 | printk(" ep : %d\n", (r_usb_ept_data & 0x00000780) >> 7); | |
677 | printk(" dev : %d\n", (r_usb_ept_data & 0x0000003f)); | |
678 | } | |
679 | ||
680 | static inline void __dump_ept_data_list(void) | |
681 | { | |
682 | int i; | |
683 | ||
684 | printk("Dumping the whole R_USB_EPT_DATA list\n"); | |
685 | ||
686 | for (i = 0; i < 32; i++) { | |
687 | __dump_ept_data(i); | |
688 | } | |
689 | } | |
690 | #ifdef USB_DEBUG_DESC | |
691 | #define dump_in_desc(...) __dump_in_desc(...) | |
692 | #define dump_sb_desc(...) __dump_sb_desc(...) | |
693 | #define dump_ep_desc(...) __dump_ep_desc(...) | |
694 | #else | |
695 | #define dump_in_desc(...) do {} while (0) | |
696 | #define dump_sb_desc(...) do {} while (0) | |
697 | #define dump_ep_desc(...) do {} while (0) | |
698 | #endif | |
699 | ||
700 | #ifdef USB_DEBUG_URB | |
701 | #define dump_urb(x) __dump_urb(x) | |
702 | #else | |
703 | #define dump_urb(x) do {} while (0) | |
704 | #endif | |
705 | ||
706 | static void init_rx_buffers(void) | |
707 | { | |
708 | int i; | |
709 | ||
710 | DBFENTER; | |
711 | ||
712 | for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) { | |
713 | RxDescList[i].sw_len = RX_DESC_BUF_SIZE; | |
714 | RxDescList[i].command = 0; | |
715 | RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]); | |
716 | RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE)); | |
717 | RxDescList[i].hw_len = 0; | |
718 | RxDescList[i].status = 0; | |
719 | ||
720 | /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as USB_IN_Desc | |
721 | for the relevant fields.) */ | |
722 | prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]); | |
723 | ||
724 | } | |
725 | ||
726 | RxDescList[i].sw_len = RX_DESC_BUF_SIZE; | |
727 | RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes); | |
728 | RxDescList[i].next = virt_to_phys(&RxDescList[0]); | |
729 | RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE)); | |
730 | RxDescList[i].hw_len = 0; | |
731 | RxDescList[i].status = 0; | |
732 | ||
733 | myNextRxDesc = &RxDescList[0]; | |
734 | myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; | |
735 | myPrevRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; | |
736 | ||
737 | *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc); | |
738 | *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start); | |
739 | ||
740 | DBFEXIT; | |
741 | } | |
742 | ||
743 | static void init_tx_bulk_ep(void) | |
744 | { | |
745 | int i; | |
746 | ||
747 | DBFENTER; | |
748 | ||
749 | for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { | |
750 | CHECK_ALIGN(&TxBulkEPList[i]); | |
751 | TxBulkEPList[i].hw_len = 0; | |
752 | TxBulkEPList[i].command = IO_FIELD(USB_EP_command, epid, i); | |
753 | TxBulkEPList[i].sub = 0; | |
754 | TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[i + 1]); | |
755 | ||
756 | /* Initiate two EPs, disabled and with the eol flag set. No need for any | |
757 | preserved epid. */ | |
758 | ||
759 | /* The first one has the intr flag set so we get an interrupt when the DMA | |
760 | channel is about to become disabled. */ | |
761 | CHECK_ALIGN(&TxBulkDummyEPList[i][0]); | |
762 | TxBulkDummyEPList[i][0].hw_len = 0; | |
763 | TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) | | |
764 | IO_STATE(USB_EP_command, eol, yes) | | |
765 | IO_STATE(USB_EP_command, intr, yes)); | |
766 | TxBulkDummyEPList[i][0].sub = 0; | |
767 | TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]); | |
768 | ||
769 | /* The second one. */ | |
770 | CHECK_ALIGN(&TxBulkDummyEPList[i][1]); | |
771 | TxBulkDummyEPList[i][1].hw_len = 0; | |
772 | TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) | | |
773 | IO_STATE(USB_EP_command, eol, yes)); | |
774 | TxBulkDummyEPList[i][1].sub = 0; | |
775 | /* The last dummy's next pointer is the same as the current EP's next pointer. */ | |
776 | TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]); | |
777 | } | |
778 | ||
779 | /* Configure the last one. */ | |
780 | CHECK_ALIGN(&TxBulkEPList[i]); | |
781 | TxBulkEPList[i].hw_len = 0; | |
782 | TxBulkEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) | | |
783 | IO_FIELD(USB_EP_command, epid, i)); | |
784 | TxBulkEPList[i].sub = 0; | |
785 | TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[0]); | |
786 | ||
787 | /* No need configuring dummy EPs for the last one as it will never be used for | |
788 | bulk traffic (i == INVALD_EPID at this point). */ | |
789 | ||
790 | /* Set up to start on the last EP so we will enable it when inserting traffic | |
791 | for the first time (imitating the situation where the DMA has stopped | |
792 | because there was no more traffic). */ | |
793 | *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]); | |
794 | /* No point in starting the bulk channel yet. | |
795 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */ | |
796 | DBFEXIT; | |
797 | } | |
798 | ||
799 | static void init_tx_ctrl_ep(void) | |
800 | { | |
801 | int i; | |
802 | ||
803 | DBFENTER; | |
804 | ||
805 | for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { | |
806 | CHECK_ALIGN(&TxCtrlEPList[i]); | |
807 | TxCtrlEPList[i].hw_len = 0; | |
808 | TxCtrlEPList[i].command = IO_FIELD(USB_EP_command, epid, i); | |
809 | TxCtrlEPList[i].sub = 0; | |
810 | TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[i + 1]); | |
811 | } | |
812 | ||
813 | CHECK_ALIGN(&TxCtrlEPList[i]); | |
814 | TxCtrlEPList[i].hw_len = 0; | |
815 | TxCtrlEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) | | |
816 | IO_FIELD(USB_EP_command, epid, i)); | |
817 | ||
818 | TxCtrlEPList[i].sub = 0; | |
819 | TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[0]); | |
820 | ||
821 | *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[0]); | |
822 | *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start); | |
823 | ||
824 | DBFEXIT; | |
825 | } | |
826 | ||
827 | ||
828 | static void init_tx_intr_ep(void) | |
829 | { | |
830 | int i; | |
831 | ||
832 | DBFENTER; | |
833 | ||
834 | /* Read comment at zout_buffer declaration for an explanation to this. */ | |
835 | TxIntrSB_zout.sw_len = 1; | |
836 | TxIntrSB_zout.next = 0; | |
837 | TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]); | |
838 | TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) | | |
839 | IO_STATE(USB_SB_command, tt, zout) | | |
840 | IO_STATE(USB_SB_command, full, yes) | | |
841 | IO_STATE(USB_SB_command, eot, yes) | | |
842 | IO_STATE(USB_SB_command, eol, yes)); | |
843 | ||
844 | for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) { | |
845 | CHECK_ALIGN(&TxIntrEPList[i]); | |
846 | TxIntrEPList[i].hw_len = 0; | |
847 | TxIntrEPList[i].command = | |
848 | (IO_STATE(USB_EP_command, eof, yes) | | |
849 | IO_STATE(USB_EP_command, enable, yes) | | |
850 | IO_FIELD(USB_EP_command, epid, INVALID_EPID)); | |
851 | TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout); | |
852 | TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]); | |
853 | } | |
854 | ||
855 | CHECK_ALIGN(&TxIntrEPList[i]); | |
856 | TxIntrEPList[i].hw_len = 0; | |
857 | TxIntrEPList[i].command = | |
858 | (IO_STATE(USB_EP_command, eof, yes) | | |
859 | IO_STATE(USB_EP_command, eol, yes) | | |
860 | IO_STATE(USB_EP_command, enable, yes) | | |
861 | IO_FIELD(USB_EP_command, epid, INVALID_EPID)); | |
862 | TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout); | |
863 | TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]); | |
864 | ||
865 | *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]); | |
866 | *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start); | |
867 | DBFEXIT; | |
868 | } | |
869 | ||
870 | static void init_tx_isoc_ep(void) | |
871 | { | |
872 | int i; | |
873 | ||
874 | DBFENTER; | |
875 | ||
876 | /* Read comment at zout_buffer declaration for an explanation to this. */ | |
877 | TxIsocSB_zout.sw_len = 1; | |
878 | TxIsocSB_zout.next = 0; | |
879 | TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]); | |
880 | TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) | | |
881 | IO_STATE(USB_SB_command, tt, zout) | | |
882 | IO_STATE(USB_SB_command, full, yes) | | |
883 | IO_STATE(USB_SB_command, eot, yes) | | |
884 | IO_STATE(USB_SB_command, eol, yes)); | |
885 | ||
886 | /* The last isochronous EP descriptor is a dummy. */ | |
887 | ||
888 | for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { | |
889 | CHECK_ALIGN(&TxIsocEPList[i]); | |
890 | TxIsocEPList[i].hw_len = 0; | |
891 | TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i); | |
892 | TxIsocEPList[i].sub = 0; | |
893 | TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]); | |
894 | } | |
895 | ||
896 | CHECK_ALIGN(&TxIsocEPList[i]); | |
897 | TxIsocEPList[i].hw_len = 0; | |
898 | ||
899 | /* Must enable the last EP descr to get eof interrupt. */ | |
900 | TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) | | |
901 | IO_STATE(USB_EP_command, eof, yes) | | |
902 | IO_STATE(USB_EP_command, eol, yes) | | |
903 | IO_FIELD(USB_EP_command, epid, INVALID_EPID)); | |
904 | TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout); | |
905 | TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]); | |
906 | ||
907 | *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]); | |
908 | *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start); | |
909 | ||
910 | DBFEXIT; | |
911 | } | |
912 | ||
913 | static void etrax_usb_unlink_intr_urb(struct urb *urb) | |
914 | { | |
915 | volatile USB_EP_Desc_t *first_ep; /* First EP in the list. */ | |
916 | volatile USB_EP_Desc_t *curr_ep; /* Current EP, the iterator. */ | |
917 | volatile USB_EP_Desc_t *next_ep; /* The EP after current. */ | |
918 | volatile USB_EP_Desc_t *unlink_ep; /* The one we should remove from the list. */ | |
919 | ||
920 | int epid; | |
921 | ||
922 | /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the List". */ | |
923 | ||
924 | DBFENTER; | |
925 | ||
926 | epid = ((etrax_urb_priv_t *)urb->hcpriv)->epid; | |
927 | ||
928 | first_ep = &TxIntrEPList[0]; | |
929 | curr_ep = first_ep; | |
930 | ||
931 | ||
932 | /* Note that this loop removes all EP descriptors with this epid. This assumes | |
933 | that all EP descriptors belong to the one and only urb for this epid. */ | |
934 | ||
935 | do { | |
936 | next_ep = (USB_EP_Desc_t *)phys_to_virt(curr_ep->next); | |
937 | ||
938 | if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) { | |
939 | ||
940 | dbg_intr("Found EP to unlink for epid %d", epid); | |
941 | ||
942 | /* This is the one we should unlink. */ | |
943 | unlink_ep = next_ep; | |
944 | ||
945 | /* Actually unlink the EP from the DMA list. */ | |
946 | curr_ep->next = unlink_ep->next; | |
947 | ||
948 | /* Wait until the DMA is no longer at this descriptor. */ | |
949 | while (*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)); | |
950 | ||
951 | /* Now we are free to remove it and its SB descriptor. | |
952 | Note that it is assumed here that there is only one sb in the | |
953 | sb list for this ep. */ | |
954 | kmem_cache_free(usb_desc_cache, phys_to_virt(unlink_ep->sub)); | |
955 | kmem_cache_free(usb_desc_cache, (USB_EP_Desc_t *)unlink_ep); | |
956 | } | |
957 | ||
958 | curr_ep = phys_to_virt(curr_ep->next); | |
959 | ||
960 | } while (curr_ep != first_ep); | |
961 | urb->hcpriv = NULL; | |
962 | } | |
963 | ||
964 | void etrax_usb_do_intr_recover(int epid) | |
965 | { | |
966 | USB_EP_Desc_t *first_ep, *tmp_ep; | |
967 | ||
968 | DBFENTER; | |
969 | ||
970 | first_ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB2_EP); | |
971 | tmp_ep = first_ep; | |
972 | ||
973 | /* What this does is simply to walk the list of interrupt | |
974 | ep descriptors and enable those that are disabled. */ | |
975 | ||
976 | do { | |
977 | if (IO_EXTRACT(USB_EP_command, epid, tmp_ep->command) == epid && | |
978 | !(tmp_ep->command & IO_MASK(USB_EP_command, enable))) { | |
979 | tmp_ep->command |= IO_STATE(USB_EP_command, enable, yes); | |
980 | } | |
981 | ||
982 | tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next); | |
983 | ||
984 | } while (tmp_ep != first_ep); | |
985 | ||
986 | ||
987 | DBFEXIT; | |
988 | } | |
989 | ||
990 | static int etrax_rh_unlink_urb (struct urb *urb) | |
991 | { | |
992 | etrax_hc_t *hc; | |
993 | ||
994 | DBFENTER; | |
995 | ||
996 | hc = urb->dev->bus->hcpriv; | |
997 | ||
998 | if (hc->rh.urb == urb) { | |
999 | hc->rh.send = 0; | |
1000 | del_timer(&hc->rh.rh_int_timer); | |
1001 | } | |
1002 | ||
1003 | DBFEXIT; | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | static void etrax_rh_send_irq(struct urb *urb) | |
1008 | { | |
1009 | __u16 data = 0; | |
1010 | etrax_hc_t *hc = urb->dev->bus->hcpriv; | |
1011 | DBFENTER; | |
1012 | ||
1013 | /* | |
1014 | dbg_rh("R_USB_FM_NUMBER : 0x%08X", *R_USB_FM_NUMBER); | |
1015 | dbg_rh("R_USB_FM_REMAINING: 0x%08X", *R_USB_FM_REMAINING); | |
1016 | */ | |
1017 | ||
1018 | data |= (hc->rh.wPortChange_1) ? (1 << 1) : 0; | |
1019 | data |= (hc->rh.wPortChange_2) ? (1 << 2) : 0; | |
1020 | ||
1021 | *((__u16 *)urb->transfer_buffer) = cpu_to_le16(data); | |
1022 | /* FIXME: Why is actual_length set to 1 when data is 2 bytes? | |
1023 | Since only 1 byte is used, why not declare data as __u8? */ | |
1024 | urb->actual_length = 1; | |
1025 | urb->status = 0; | |
1026 | ||
1027 | if (hc->rh.send && urb->complete) { | |
1028 | dbg_rh("wPortChange_1: 0x%04X", hc->rh.wPortChange_1); | |
1029 | dbg_rh("wPortChange_2: 0x%04X", hc->rh.wPortChange_2); | |
1030 | ||
1031 | urb->complete(urb, NULL); | |
1032 | } | |
1033 | ||
1034 | DBFEXIT; | |
1035 | } | |
1036 | ||
1037 | static void etrax_rh_init_int_timer(struct urb *urb) | |
1038 | { | |
1039 | etrax_hc_t *hc; | |
1040 | ||
1041 | DBFENTER; | |
1042 | ||
1043 | hc = urb->dev->bus->hcpriv; | |
1044 | hc->rh.interval = urb->interval; | |
1045 | init_timer(&hc->rh.rh_int_timer); | |
1046 | hc->rh.rh_int_timer.function = etrax_rh_int_timer_do; | |
1047 | hc->rh.rh_int_timer.data = (unsigned long)urb; | |
1048 | /* FIXME: Is the jiffies resolution enough? All intervals < 10 ms will be mapped | |
1049 | to 0, and the rest to the nearest lower 10 ms. */ | |
1050 | hc->rh.rh_int_timer.expires = jiffies + ((HZ * hc->rh.interval) / 1000); | |
1051 | add_timer(&hc->rh.rh_int_timer); | |
1052 | ||
1053 | DBFEXIT; | |
1054 | } | |
1055 | ||
1056 | static void etrax_rh_int_timer_do(unsigned long ptr) | |
1057 | { | |
1058 | struct urb *urb; | |
1059 | etrax_hc_t *hc; | |
1060 | ||
1061 | DBFENTER; | |
1062 | ||
1063 | urb = (struct urb*)ptr; | |
1064 | hc = urb->dev->bus->hcpriv; | |
1065 | ||
1066 | if (hc->rh.send) { | |
1067 | etrax_rh_send_irq(urb); | |
1068 | } | |
1069 | ||
1070 | DBFEXIT; | |
1071 | } | |
1072 | ||
1073 | static int etrax_usb_setup_epid(struct urb *urb) | |
1074 | { | |
1075 | int epid; | |
1076 | char devnum, endpoint, out_traffic, slow; | |
1077 | int maxlen; | |
1078 | unsigned long flags; | |
1079 | ||
1080 | DBFENTER; | |
1081 | ||
1082 | epid = etrax_usb_lookup_epid(urb); | |
1083 | if ((epid != -1)){ | |
1084 | /* An epid that fits this urb has been found. */ | |
1085 | DBFEXIT; | |
1086 | return epid; | |
1087 | } | |
1088 | ||
1089 | /* We must find and initiate a new epid for this urb. */ | |
1090 | epid = etrax_usb_allocate_epid(); | |
1091 | ||
1092 | if (epid == -1) { | |
1093 | /* Failed to allocate a new epid. */ | |
1094 | DBFEXIT; | |
1095 | return epid; | |
1096 | } | |
1097 | ||
1098 | /* We now have a new epid to use. Initiate it. */ | |
1099 | set_bit(epid, (void *)&epid_usage_bitmask); | |
1100 | ||
1101 | devnum = usb_pipedevice(urb->pipe); | |
1102 | endpoint = usb_pipeendpoint(urb->pipe); | |
1103 | slow = usb_pipeslow(urb->pipe); | |
1104 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
1105 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1106 | /* We want both IN and OUT control traffic to be put on the same EP/SB list. */ | |
1107 | out_traffic = 1; | |
1108 | } else { | |
1109 | out_traffic = usb_pipeout(urb->pipe); | |
1110 | } | |
1111 | ||
1112 | save_flags(flags); | |
1113 | cli(); | |
1114 | ||
1115 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
1116 | nop(); | |
1117 | ||
1118 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1119 | *R_USB_EPT_DATA_ISO = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) | | |
1120 | /* FIXME: Change any to the actual port? */ | |
1121 | IO_STATE(R_USB_EPT_DATA_ISO, port, any) | | |
1122 | IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) | | |
1123 | IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) | | |
1124 | IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum); | |
1125 | } else { | |
1126 | *R_USB_EPT_DATA = IO_STATE(R_USB_EPT_DATA, valid, yes) | | |
1127 | IO_FIELD(R_USB_EPT_DATA, low_speed, slow) | | |
1128 | /* FIXME: Change any to the actual port? */ | |
1129 | IO_STATE(R_USB_EPT_DATA, port, any) | | |
1130 | IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) | | |
1131 | IO_FIELD(R_USB_EPT_DATA, ep, endpoint) | | |
1132 | IO_FIELD(R_USB_EPT_DATA, dev, devnum); | |
1133 | } | |
1134 | ||
1135 | restore_flags(flags); | |
1136 | ||
1137 | if (out_traffic) { | |
1138 | set_bit(epid, (void *)&epid_out_traffic); | |
1139 | } else { | |
1140 | clear_bit(epid, (void *)&epid_out_traffic); | |
1141 | } | |
1142 | ||
1143 | dbg_epid("Setting up epid %d with devnum %d, endpoint %d and max_len %d (%s)", | |
1144 | epid, devnum, endpoint, maxlen, out_traffic ? "OUT" : "IN"); | |
1145 | ||
1146 | DBFEXIT; | |
1147 | return epid; | |
1148 | } | |
1149 | ||
1150 | static void etrax_usb_free_epid(int epid) | |
1151 | { | |
1152 | unsigned long flags; | |
1153 | ||
1154 | DBFENTER; | |
1155 | ||
1156 | if (!test_bit(epid, (void *)&epid_usage_bitmask)) { | |
1157 | warn("Trying to free unused epid %d", epid); | |
1158 | DBFEXIT; | |
1159 | return; | |
1160 | } | |
1161 | ||
1162 | save_flags(flags); | |
1163 | cli(); | |
1164 | ||
1165 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
1166 | nop(); | |
1167 | while (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)); | |
1168 | /* This will, among other things, set the valid field to 0. */ | |
1169 | *R_USB_EPT_DATA = 0; | |
1170 | restore_flags(flags); | |
1171 | ||
1172 | clear_bit(epid, (void *)&epid_usage_bitmask); | |
1173 | ||
1174 | ||
1175 | dbg_epid("Freed epid %d", epid); | |
1176 | ||
1177 | DBFEXIT; | |
1178 | } | |
1179 | ||
1180 | static int etrax_usb_lookup_epid(struct urb *urb) | |
1181 | { | |
1182 | int i; | |
1183 | __u32 data; | |
1184 | char devnum, endpoint, slow, out_traffic; | |
1185 | int maxlen; | |
1186 | unsigned long flags; | |
1187 | ||
1188 | DBFENTER; | |
1189 | ||
1190 | devnum = usb_pipedevice(urb->pipe); | |
1191 | endpoint = usb_pipeendpoint(urb->pipe); | |
1192 | slow = usb_pipeslow(urb->pipe); | |
1193 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
1194 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1195 | /* We want both IN and OUT control traffic to be put on the same EP/SB list. */ | |
1196 | out_traffic = 1; | |
1197 | } else { | |
1198 | out_traffic = usb_pipeout(urb->pipe); | |
1199 | } | |
1200 | ||
1201 | /* Step through att epids. */ | |
1202 | for (i = 0; i < NBR_OF_EPIDS; i++) { | |
1203 | if (test_bit(i, (void *)&epid_usage_bitmask) && | |
1204 | test_bit(i, (void *)&epid_out_traffic) == out_traffic) { | |
1205 | ||
1206 | save_flags(flags); | |
1207 | cli(); | |
1208 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, i); | |
1209 | nop(); | |
1210 | ||
1211 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1212 | data = *R_USB_EPT_DATA_ISO; | |
1213 | restore_flags(flags); | |
1214 | ||
1215 | if ((IO_MASK(R_USB_EPT_DATA_ISO, valid) & data) && | |
1216 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, dev, data) == devnum) && | |
1217 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, ep, data) == endpoint) && | |
1218 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len, data) == maxlen)) { | |
1219 | dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)", | |
1220 | i, devnum, endpoint, out_traffic ? "OUT" : "IN"); | |
1221 | DBFEXIT; | |
1222 | return i; | |
1223 | } | |
1224 | } else { | |
1225 | data = *R_USB_EPT_DATA; | |
1226 | restore_flags(flags); | |
1227 | ||
1228 | if ((IO_MASK(R_USB_EPT_DATA, valid) & data) && | |
1229 | (IO_EXTRACT(R_USB_EPT_DATA, dev, data) == devnum) && | |
1230 | (IO_EXTRACT(R_USB_EPT_DATA, ep, data) == endpoint) && | |
1231 | (IO_EXTRACT(R_USB_EPT_DATA, low_speed, data) == slow) && | |
1232 | (IO_EXTRACT(R_USB_EPT_DATA, max_len, data) == maxlen)) { | |
1233 | dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)", | |
1234 | i, devnum, endpoint, out_traffic ? "OUT" : "IN"); | |
1235 | DBFEXIT; | |
1236 | return i; | |
1237 | } | |
1238 | } | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | DBFEXIT; | |
1243 | return -1; | |
1244 | } | |
1245 | ||
1246 | static int etrax_usb_allocate_epid(void) | |
1247 | { | |
1248 | int i; | |
1249 | ||
1250 | DBFENTER; | |
1251 | ||
1252 | for (i = 0; i < NBR_OF_EPIDS; i++) { | |
1253 | if (!test_bit(i, (void *)&epid_usage_bitmask)) { | |
1254 | dbg_epid("Found free epid %d", i); | |
1255 | DBFEXIT; | |
1256 | return i; | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | dbg_epid("Found no free epids"); | |
1261 | DBFEXIT; | |
1262 | return -1; | |
1263 | } | |
1264 | ||
1265 | static int etrax_usb_submit_urb(struct urb *urb, int mem_flags) | |
1266 | { | |
1267 | etrax_hc_t *hc; | |
1268 | int ret = -EINVAL; | |
1269 | ||
1270 | DBFENTER; | |
1271 | ||
1272 | if (!urb->dev || !urb->dev->bus) { | |
1273 | return -ENODEV; | |
1274 | } | |
1275 | if (usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)) <= 0) { | |
1276 | info("Submit urb to pipe with maxpacketlen 0, pipe 0x%X\n", urb->pipe); | |
1277 | return -EMSGSIZE; | |
1278 | } | |
1279 | ||
1280 | if (urb->timeout) { | |
1281 | /* FIXME. */ | |
1282 | warn("urb->timeout specified, ignoring."); | |
1283 | } | |
1284 | ||
1285 | hc = (etrax_hc_t*)urb->dev->bus->hcpriv; | |
1286 | ||
1287 | if (usb_pipedevice(urb->pipe) == hc->rh.devnum) { | |
1288 | /* This request is for the Virtual Root Hub. */ | |
1289 | ret = etrax_rh_submit_urb(urb); | |
1290 | ||
1291 | } else if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
1292 | ||
1293 | ret = etrax_usb_submit_bulk_urb(urb); | |
1294 | ||
1295 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1296 | ||
1297 | ret = etrax_usb_submit_ctrl_urb(urb); | |
1298 | ||
1299 | } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
1300 | int bustime; | |
1301 | ||
1302 | if (urb->bandwidth == 0) { | |
1303 | bustime = usb_check_bandwidth(urb->dev, urb); | |
1304 | if (bustime < 0) { | |
1305 | ret = bustime; | |
1306 | } else { | |
1307 | ret = etrax_usb_submit_intr_urb(urb); | |
1308 | if (ret == 0) | |
1309 | usb_claim_bandwidth(urb->dev, urb, bustime, 0); | |
1310 | } | |
1311 | } else { | |
1312 | /* Bandwidth already set. */ | |
1313 | ret = etrax_usb_submit_intr_urb(urb); | |
1314 | } | |
1315 | ||
1316 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1317 | int bustime; | |
1318 | ||
1319 | if (urb->bandwidth == 0) { | |
1320 | bustime = usb_check_bandwidth(urb->dev, urb); | |
1321 | if (bustime < 0) { | |
1322 | ret = bustime; | |
1323 | } else { | |
1324 | ret = etrax_usb_submit_isoc_urb(urb); | |
1325 | if (ret == 0) | |
1326 | usb_claim_bandwidth(urb->dev, urb, bustime, 0); | |
1327 | } | |
1328 | } else { | |
1329 | /* Bandwidth already set. */ | |
1330 | ret = etrax_usb_submit_isoc_urb(urb); | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | DBFEXIT; | |
1335 | ||
1336 | if (ret != 0) | |
1337 | printk("Submit URB error %d\n", ret); | |
1338 | ||
1339 | return ret; | |
1340 | } | |
1341 | ||
1342 | static int etrax_usb_unlink_urb(struct urb *urb, int status) | |
1343 | { | |
1344 | etrax_hc_t *hc; | |
1345 | etrax_urb_priv_t *urb_priv; | |
1346 | int epid; | |
1347 | unsigned int flags; | |
1348 | ||
1349 | DBFENTER; | |
1350 | ||
1351 | if (!urb) { | |
1352 | return -EINVAL; | |
1353 | } | |
1354 | ||
1355 | /* Disable interrupts here since a descriptor interrupt for the isoc epid | |
1356 | will modify the sb list. This could possibly be done more granular, but | |
1357 | unlink_urb should not be used frequently anyway. | |
1358 | */ | |
1359 | ||
1360 | save_flags(flags); | |
1361 | cli(); | |
1362 | ||
1363 | if (!urb->dev || !urb->dev->bus) { | |
1364 | restore_flags(flags); | |
1365 | return -ENODEV; | |
1366 | } | |
1367 | if (!urb->hcpriv) { | |
1368 | /* This happens if a device driver calls unlink on an urb that | |
1369 | was never submitted (lazy driver) or if the urb was completed | |
1370 | while unlink was being called. */ | |
1371 | restore_flags(flags); | |
1372 | return 0; | |
1373 | } | |
1374 | if (urb->transfer_flags & URB_ASYNC_UNLINK) { | |
1375 | /* FIXME. */ | |
1376 | /* If URB_ASYNC_UNLINK is set: | |
1377 | unlink | |
1378 | move to a separate urb list | |
1379 | call complete at next sof with ECONNRESET | |
1380 | ||
1381 | If not: | |
1382 | wait 1 ms | |
1383 | unlink | |
1384 | call complete with ENOENT | |
1385 | */ | |
1386 | warn("URB_ASYNC_UNLINK set, ignoring."); | |
1387 | } | |
1388 | ||
1389 | /* One might think that urb->status = -EINPROGRESS would be a requirement for unlinking, | |
1390 | but that doesn't work for interrupt and isochronous traffic since they are completed | |
1391 | repeatedly, and urb->status is set then. That may in itself be a bug though. */ | |
1392 | ||
1393 | hc = urb->dev->bus->hcpriv; | |
1394 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1395 | epid = urb_priv->epid; | |
1396 | ||
1397 | /* Set the urb status (synchronous unlink). */ | |
1398 | urb->status = -ENOENT; | |
1399 | urb_priv->urb_state = UNLINK; | |
1400 | ||
1401 | if (usb_pipedevice(urb->pipe) == hc->rh.devnum) { | |
1402 | int ret; | |
1403 | ret = etrax_rh_unlink_urb(urb); | |
1404 | DBFEXIT; | |
1405 | restore_flags(flags); | |
1406 | return ret; | |
1407 | ||
1408 | } else if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
1409 | ||
1410 | dbg_bulk("Unlink of bulk urb (0x%lx)", (unsigned long)urb); | |
1411 | ||
1412 | if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
1413 | /* The EP was enabled, disable it and wait. */ | |
1414 | TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
1415 | ||
1416 | /* Ah, the luxury of busy-wait. */ | |
1417 | while (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[epid])); | |
1418 | } | |
1419 | /* Kicking dummy list out of the party. */ | |
1420 | TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]); | |
1421 | ||
1422 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1423 | ||
1424 | dbg_ctrl("Unlink of ctrl urb (0x%lx)", (unsigned long)urb); | |
1425 | ||
1426 | if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
1427 | /* The EP was enabled, disable it and wait. */ | |
1428 | TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
1429 | ||
1430 | /* Ah, the luxury of busy-wait. */ | |
1431 | while (*R_DMA_CH8_SUB1_EP == virt_to_phys(&TxCtrlEPList[epid])); | |
1432 | } | |
1433 | ||
1434 | } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
1435 | ||
1436 | dbg_intr("Unlink of intr urb (0x%lx)", (unsigned long)urb); | |
1437 | ||
1438 | /* Separate function because it's a tad more complicated. */ | |
1439 | etrax_usb_unlink_intr_urb(urb); | |
1440 | ||
1441 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1442 | ||
1443 | dbg_isoc("Unlink of isoc urb (0x%lx)", (unsigned long)urb); | |
1444 | ||
1445 | if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
1446 | /* The EP was enabled, disable it and wait. */ | |
1447 | TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
1448 | ||
1449 | /* Ah, the luxury of busy-wait. */ | |
1450 | while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /* Note that we need to remove the urb from the urb list *before* removing its SB | |
1455 | descriptors. (This means that the isoc eof handler might get a null urb when we | |
1456 | are unlinking the last urb.) */ | |
1457 | ||
1458 | if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
1459 | ||
1460 | urb_list_del(urb, epid); | |
1461 | TxBulkEPList[epid].sub = 0; | |
1462 | etrax_remove_from_sb_list(urb); | |
1463 | ||
1464 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1465 | ||
1466 | urb_list_del(urb, epid); | |
1467 | TxCtrlEPList[epid].sub = 0; | |
1468 | etrax_remove_from_sb_list(urb); | |
1469 | ||
1470 | } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
1471 | ||
1472 | urb_list_del(urb, epid); | |
1473 | /* Sanity check (should never happen). */ | |
1474 | assert(urb_list_empty(epid)); | |
1475 | ||
1476 | /* Release allocated bandwidth. */ | |
1477 | usb_release_bandwidth(urb->dev, urb, 0); | |
1478 | ||
1479 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1480 | ||
1481 | if (usb_pipeout(urb->pipe)) { | |
1482 | ||
1483 | USB_SB_Desc_t *iter_sb, *prev_sb, *next_sb; | |
1484 | ||
1485 | if (__urb_list_entry(urb, epid)) { | |
1486 | ||
1487 | urb_list_del(urb, epid); | |
1488 | iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0; | |
1489 | prev_sb = 0; | |
1490 | while (iter_sb && (iter_sb != urb_priv->first_sb)) { | |
1491 | prev_sb = iter_sb; | |
1492 | iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0; | |
1493 | } | |
1494 | ||
1495 | if (iter_sb == 0) { | |
1496 | /* Unlink of the URB currently being transmitted. */ | |
1497 | prev_sb = 0; | |
1498 | iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0; | |
1499 | } | |
1500 | ||
1501 | while (iter_sb && (iter_sb != urb_priv->last_sb)) { | |
1502 | iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0; | |
1503 | } | |
1504 | if (iter_sb) { | |
1505 | next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0; | |
1506 | } else { | |
1507 | /* This should only happen if the DMA has completed | |
1508 | processing the SB list for this EP while interrupts | |
1509 | are disabled. */ | |
1510 | dbg_isoc("Isoc urb not found, already sent?"); | |
1511 | next_sb = 0; | |
1512 | } | |
1513 | if (prev_sb) { | |
1514 | prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0; | |
1515 | } else { | |
1516 | TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0; | |
1517 | } | |
1518 | ||
1519 | etrax_remove_from_sb_list(urb); | |
1520 | if (urb_list_empty(epid)) { | |
1521 | TxIsocEPList[epid].sub = 0; | |
1522 | dbg_isoc("Last isoc out urb epid %d", epid); | |
1523 | } else if (next_sb || prev_sb) { | |
1524 | dbg_isoc("Re-enable isoc out epid %d", epid); | |
1525 | ||
1526 | TxIsocEPList[epid].hw_len = 0; | |
1527 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
1528 | } else { | |
1529 | TxIsocEPList[epid].sub = 0; | |
1530 | dbg_isoc("URB list non-empty and no SB list, EP disabled"); | |
1531 | } | |
1532 | } else { | |
1533 | dbg_isoc("Urb 0x%p not found, completed already?", urb); | |
1534 | } | |
1535 | } else { | |
1536 | ||
1537 | urb_list_del(urb, epid); | |
1538 | ||
1539 | /* For in traffic there is only one SB descriptor for each EP even | |
1540 | though there may be several urbs (all urbs point at the same SB). */ | |
1541 | if (urb_list_empty(epid)) { | |
1542 | /* No more urbs, remove the SB. */ | |
1543 | TxIsocEPList[epid].sub = 0; | |
1544 | etrax_remove_from_sb_list(urb); | |
1545 | } else { | |
1546 | TxIsocEPList[epid].hw_len = 0; | |
1547 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
1548 | } | |
1549 | } | |
1550 | /* Release allocated bandwidth. */ | |
1551 | usb_release_bandwidth(urb->dev, urb, 1); | |
1552 | } | |
1553 | /* Free the epid if urb list is empty. */ | |
1554 | if (urb_list_empty(epid)) { | |
1555 | etrax_usb_free_epid(epid); | |
1556 | } | |
1557 | restore_flags(flags); | |
1558 | ||
1559 | /* Must be done before calling completion handler. */ | |
1560 | kfree(urb_priv); | |
1561 | urb->hcpriv = 0; | |
1562 | ||
1563 | if (urb->complete) { | |
1564 | urb->complete(urb, NULL); | |
1565 | } | |
1566 | ||
1567 | DBFEXIT; | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | static int etrax_usb_get_frame_number(struct usb_device *usb_dev) | |
1572 | { | |
1573 | DBFENTER; | |
1574 | DBFEXIT; | |
1575 | return (*R_USB_FM_NUMBER & 0x7ff); | |
1576 | } | |
1577 | ||
1578 | static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc, struct pt_regs *regs) | |
1579 | { | |
1580 | DBFENTER; | |
1581 | ||
1582 | /* This interrupt handler could be used when unlinking EP descriptors. */ | |
1583 | ||
1584 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) { | |
1585 | USB_EP_Desc_t *ep; | |
1586 | ||
1587 | //dbg_bulk("dma8_sub0_descr (BULK) intr."); | |
1588 | ||
1589 | /* It should be safe clearing the interrupt here, since we don't expect to get a new | |
1590 | one until we restart the bulk channel. */ | |
1591 | *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do); | |
1592 | ||
1593 | /* Wait while the DMA is running (though we don't expect it to be). */ | |
1594 | while (*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd)); | |
1595 | ||
1596 | /* Advance the DMA to the next EP descriptor. */ | |
1597 | ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP); | |
1598 | ||
1599 | //dbg_bulk("descr intr: DMA is at 0x%lx", (unsigned long)ep); | |
1600 | ||
1601 | /* ep->next is already a physical address; no need for a virt_to_phys. */ | |
1602 | *R_DMA_CH8_SUB0_EP = ep->next; | |
1603 | ||
1604 | /* Start the DMA bulk channel again. */ | |
1605 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); | |
1606 | } | |
1607 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) { | |
1608 | struct urb *urb; | |
1609 | int epid; | |
1610 | etrax_urb_priv_t *urb_priv; | |
1611 | unsigned long int flags; | |
1612 | ||
1613 | dbg_ctrl("dma8_sub1_descr (CTRL) intr."); | |
1614 | *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do); | |
1615 | ||
1616 | /* The complete callback gets called so we cli. */ | |
1617 | save_flags(flags); | |
1618 | cli(); | |
1619 | ||
1620 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
1621 | if ((TxCtrlEPList[epid].sub == 0) || | |
1622 | (epid == DUMMY_EPID) || | |
1623 | (epid == INVALID_EPID)) { | |
1624 | /* Nothing here to see. */ | |
1625 | continue; | |
1626 | } | |
1627 | ||
1628 | /* Get the first urb (if any). */ | |
1629 | urb = urb_list_first(epid); | |
1630 | ||
1631 | if (urb) { | |
1632 | ||
1633 | /* Sanity check. */ | |
1634 | assert(usb_pipetype(urb->pipe) == PIPE_CONTROL); | |
1635 | ||
1636 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1637 | assert(urb_priv); | |
1638 | ||
1639 | if (urb_priv->urb_state == WAITING_FOR_DESCR_INTR) { | |
1640 | assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable))); | |
1641 | ||
1642 | etrax_usb_complete_urb(urb, 0); | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | restore_flags(flags); | |
1647 | } | |
1648 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) { | |
1649 | dbg_intr("dma8_sub2_descr (INTR) intr."); | |
1650 | *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do); | |
1651 | } | |
1652 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) { | |
1653 | struct urb *urb; | |
1654 | int epid; | |
1655 | int epid_done; | |
1656 | etrax_urb_priv_t *urb_priv; | |
1657 | USB_SB_Desc_t *sb_desc; | |
1658 | ||
1659 | usb_isoc_complete_data_t *comp_data = NULL; | |
1660 | ||
1661 | /* One or more isoc out transfers are done. */ | |
1662 | dbg_isoc("dma8_sub3_descr (ISOC) intr."); | |
1663 | ||
1664 | /* For each isoc out EP search for the first sb_desc with the intr flag | |
1665 | set. This descriptor must be the last packet from an URB. Then | |
1666 | traverse the URB list for the EP until the URB with urb_priv->last_sb | |
1667 | matching the intr-marked sb_desc is found. All URBs before this have | |
1668 | been sent. | |
1669 | */ | |
1670 | ||
1671 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
1672 | /* Skip past epids with no SB lists, epids used for in traffic, | |
1673 | and special (dummy, invalid) epids. */ | |
1674 | if ((TxIsocEPList[epid].sub == 0) || | |
1675 | (test_bit(epid, (void *)&epid_out_traffic) == 0) || | |
1676 | (epid == DUMMY_EPID) || | |
1677 | (epid == INVALID_EPID)) { | |
1678 | /* Nothing here to see. */ | |
1679 | continue; | |
1680 | } | |
1681 | sb_desc = phys_to_virt(TxIsocEPList[epid].sub); | |
1682 | ||
1683 | /* Find the last descriptor of the currently active URB for this ep. | |
1684 | This is the first descriptor in the sub list marked for a descriptor | |
1685 | interrupt. */ | |
1686 | while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) { | |
1687 | sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0; | |
1688 | } | |
1689 | assert(sb_desc); | |
1690 | ||
1691 | dbg_isoc("Check epid %d, sub 0x%p, SB 0x%p", | |
1692 | epid, | |
1693 | phys_to_virt(TxIsocEPList[epid].sub), | |
1694 | sb_desc); | |
1695 | ||
1696 | epid_done = 0; | |
1697 | ||
1698 | /* Get the first urb (if any). */ | |
1699 | urb = urb_list_first(epid); | |
1700 | assert(urb); | |
1701 | ||
1702 | while (urb && !epid_done) { | |
1703 | ||
1704 | /* Sanity check. */ | |
1705 | assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS); | |
1706 | ||
1707 | if (!usb_pipeout(urb->pipe)) { | |
1708 | /* descr interrupts are generated only for out pipes. */ | |
1709 | epid_done = 1; | |
1710 | continue; | |
1711 | } | |
1712 | ||
1713 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1714 | assert(urb_priv); | |
1715 | ||
1716 | if (sb_desc != urb_priv->last_sb) { | |
1717 | ||
1718 | /* This urb has been sent. */ | |
1719 | dbg_isoc("out URB 0x%p sent", urb); | |
1720 | ||
1721 | urb_priv->urb_state = TRANSFER_DONE; | |
1722 | ||
1723 | } else if ((sb_desc == urb_priv->last_sb) && | |
1724 | !(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) { | |
1725 | ||
1726 | assert((sb_desc->command & IO_MASK(USB_SB_command, eol)) == IO_STATE(USB_SB_command, eol, yes)); | |
1727 | assert(sb_desc->next == 0); | |
1728 | ||
1729 | dbg_isoc("out URB 0x%p last in list, epid disabled", urb); | |
1730 | TxIsocEPList[epid].sub = 0; | |
1731 | TxIsocEPList[epid].hw_len = 0; | |
1732 | urb_priv->urb_state = TRANSFER_DONE; | |
1733 | ||
1734 | epid_done = 1; | |
1735 | ||
1736 | } else { | |
1737 | epid_done = 1; | |
1738 | } | |
1739 | if (!epid_done) { | |
1740 | urb = urb_list_next(urb, epid); | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | } | |
1745 | ||
1746 | *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do); | |
1747 | ||
1748 | comp_data = (usb_isoc_complete_data_t*)kmem_cache_alloc(isoc_compl_cache, SLAB_ATOMIC); | |
1749 | assert(comp_data != NULL); | |
1750 | ||
1751 | INIT_WORK(&comp_data->usb_bh, etrax_usb_isoc_descr_interrupt_bottom_half, comp_data); | |
1752 | schedule_work(&comp_data->usb_bh); | |
1753 | } | |
1754 | ||
1755 | DBFEXIT; | |
1756 | return IRQ_HANDLED; | |
1757 | } | |
1758 | ||
1759 | static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data) | |
1760 | { | |
1761 | usb_isoc_complete_data_t *comp_data = (usb_isoc_complete_data_t*)data; | |
1762 | ||
1763 | struct urb *urb; | |
1764 | int epid; | |
1765 | int epid_done; | |
1766 | etrax_urb_priv_t *urb_priv; | |
1767 | ||
1768 | DBFENTER; | |
1769 | ||
1770 | dbg_isoc("dma8_sub3_descr (ISOC) bottom half."); | |
1771 | ||
1772 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
1773 | unsigned long flags; | |
1774 | ||
1775 | save_flags(flags); | |
1776 | cli(); | |
1777 | ||
1778 | epid_done = 0; | |
1779 | ||
1780 | /* The descriptor interrupt handler has marked all transmitted isoch. out | |
1781 | URBs with TRANSFER_DONE. Now we traverse all epids and for all that | |
1782 | have isoch. out traffic traverse its URB list and complete the | |
1783 | transmitted URB. | |
1784 | */ | |
1785 | ||
1786 | while (!epid_done) { | |
1787 | ||
1788 | /* Get the first urb (if any). */ | |
1789 | urb = urb_list_first(epid); | |
1790 | if (urb == 0) { | |
1791 | epid_done = 1; | |
1792 | continue; | |
1793 | } | |
1794 | ||
1795 | if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) { | |
1796 | epid_done = 1; | |
1797 | continue; | |
1798 | } | |
1799 | ||
1800 | if (!usb_pipeout(urb->pipe)) { | |
1801 | /* descr interrupts are generated only for out pipes. */ | |
1802 | epid_done = 1; | |
1803 | continue; | |
1804 | } | |
1805 | ||
1806 | dbg_isoc("Check epid %d, SB 0x%p", epid, (char*)TxIsocEPList[epid].sub); | |
1807 | ||
1808 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1809 | assert(urb_priv); | |
1810 | ||
1811 | if (urb_priv->urb_state == TRANSFER_DONE) { | |
1812 | int i; | |
1813 | struct usb_iso_packet_descriptor *packet; | |
1814 | ||
1815 | /* This urb has been sent. */ | |
1816 | dbg_isoc("Completing isoc out URB 0x%p", urb); | |
1817 | ||
1818 | for (i = 0; i < urb->number_of_packets; i++) { | |
1819 | packet = &urb->iso_frame_desc[i]; | |
1820 | packet->status = 0; | |
1821 | packet->actual_length = packet->length; | |
1822 | } | |
1823 | ||
1824 | etrax_usb_complete_isoc_urb(urb, 0); | |
1825 | ||
1826 | if (urb_list_empty(epid)) { | |
1827 | etrax_usb_free_epid(epid); | |
1828 | epid_done = 1; | |
1829 | } | |
1830 | } else { | |
1831 | epid_done = 1; | |
1832 | } | |
1833 | } | |
1834 | restore_flags(flags); | |
1835 | ||
1836 | } | |
1837 | kmem_cache_free(isoc_compl_cache, comp_data); | |
1838 | ||
1839 | DBFEXIT; | |
1840 | } | |
1841 | ||
1842 | ||
1843 | ||
1844 | static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc, struct pt_regs *regs) | |
1845 | { | |
1846 | struct urb *urb; | |
1847 | etrax_urb_priv_t *urb_priv; | |
1848 | int epid = 0; | |
1849 | unsigned long flags; | |
1850 | ||
1851 | /* Isoc diagnostics. */ | |
1852 | static int curr_fm = 0; | |
1853 | static int prev_fm = 0; | |
1854 | ||
1855 | DBFENTER; | |
1856 | ||
1857 | /* Clear this interrupt. */ | |
1858 | *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do); | |
1859 | ||
1860 | /* Note that this while loop assumes that all packets span only | |
1861 | one rx descriptor. */ | |
1862 | ||
1863 | /* The reason we cli here is that we call the driver's callback functions. */ | |
1864 | save_flags(flags); | |
1865 | cli(); | |
1866 | ||
1867 | while (myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) { | |
1868 | ||
1869 | epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status); | |
1870 | urb = urb_list_first(epid); | |
1871 | ||
1872 | //printk("eop for epid %d, first urb 0x%lx\n", epid, (unsigned long)urb); | |
1873 | ||
1874 | if (!urb) { | |
1875 | err("No urb for epid %d in rx interrupt", epid); | |
1876 | __dump_ept_data(epid); | |
1877 | goto skip_out; | |
1878 | } | |
1879 | ||
1880 | /* Note that we cannot indescriminately assert(usb_pipein(urb->pipe)) since | |
1881 | ctrl pipes are not. */ | |
1882 | ||
1883 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) { | |
1884 | __u32 r_usb_ept_data; | |
1885 | int no_error = 0; | |
1886 | ||
1887 | assert(test_bit(epid, (void *)&epid_usage_bitmask)); | |
1888 | ||
1889 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
1890 | nop(); | |
1891 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1892 | r_usb_ept_data = *R_USB_EPT_DATA_ISO; | |
1893 | ||
1894 | if ((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) && | |
1895 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) && | |
1896 | (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) { | |
1897 | /* Not an error, just a failure to receive an expected iso | |
1898 | in packet in this frame. This is not documented | |
1899 | in the designers reference. | |
1900 | */ | |
1901 | no_error++; | |
1902 | } else { | |
1903 | warn("R_USB_EPT_DATA_ISO for epid %d = 0x%x", epid, r_usb_ept_data); | |
1904 | } | |
1905 | } else { | |
1906 | r_usb_ept_data = *R_USB_EPT_DATA; | |
1907 | warn("R_USB_EPT_DATA for epid %d = 0x%x", epid, r_usb_ept_data); | |
1908 | } | |
1909 | ||
1910 | if (!no_error){ | |
1911 | warn("error in rx desc->status, epid %d, first urb = 0x%lx", | |
1912 | epid, (unsigned long)urb); | |
1913 | __dump_in_desc(myNextRxDesc); | |
1914 | ||
1915 | warn("R_USB_STATUS = 0x%x", *R_USB_STATUS); | |
1916 | ||
1917 | /* Check that ept was disabled when error occurred. */ | |
1918 | switch (usb_pipetype(urb->pipe)) { | |
1919 | case PIPE_BULK: | |
1920 | assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1921 | break; | |
1922 | case PIPE_CONTROL: | |
1923 | assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1924 | break; | |
1925 | case PIPE_INTERRUPT: | |
1926 | assert(!(TxIntrEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1927 | break; | |
1928 | case PIPE_ISOCHRONOUS: | |
1929 | assert(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1930 | break; | |
1931 | default: | |
1932 | warn("etrax_usb_rx_interrupt: bad pipetype %d in urb 0x%p", | |
1933 | usb_pipetype(urb->pipe), | |
1934 | urb); | |
1935 | } | |
1936 | etrax_usb_complete_urb(urb, -EPROTO); | |
1937 | goto skip_out; | |
1938 | } | |
1939 | } | |
1940 | ||
1941 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1942 | assert(urb_priv); | |
1943 | ||
1944 | if ((usb_pipetype(urb->pipe) == PIPE_BULK) || | |
1945 | (usb_pipetype(urb->pipe) == PIPE_CONTROL) || | |
1946 | (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) { | |
1947 | ||
1948 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) { | |
1949 | /* We get nodata for empty data transactions, and the rx descriptor's | |
1950 | hw_len field is not valid in that case. No data to copy in other | |
1951 | words. */ | |
1952 | } else { | |
1953 | /* Make sure the data fits in the buffer. */ | |
1954 | assert(urb_priv->rx_offset + myNextRxDesc->hw_len | |
1955 | <= urb->transfer_buffer_length); | |
1956 | ||
1957 | memcpy(urb->transfer_buffer + urb_priv->rx_offset, | |
1958 | phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len); | |
1959 | urb_priv->rx_offset += myNextRxDesc->hw_len; | |
1960 | } | |
1961 | ||
1962 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) { | |
1963 | if ((usb_pipetype(urb->pipe) == PIPE_CONTROL) && | |
1964 | ((TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)) == | |
1965 | IO_STATE(USB_EP_command, enable, yes))) { | |
1966 | /* The EP is still enabled, so the OUT packet used to ack | |
1967 | the in data is probably not processed yet. If the EP | |
1968 | sub pointer has not moved beyond urb_priv->last_sb mark | |
1969 | it for a descriptor interrupt and complete the urb in | |
1970 | the descriptor interrupt handler. | |
1971 | */ | |
1972 | USB_SB_Desc_t *sub = TxCtrlEPList[urb_priv->epid].sub ? phys_to_virt(TxCtrlEPList[urb_priv->epid].sub) : 0; | |
1973 | ||
1974 | while ((sub != NULL) && (sub != urb_priv->last_sb)) { | |
1975 | sub = sub->next ? phys_to_virt(sub->next) : 0; | |
1976 | } | |
1977 | if (sub != NULL) { | |
1978 | /* The urb has not been fully processed. */ | |
1979 | urb_priv->urb_state = WAITING_FOR_DESCR_INTR; | |
1980 | } else { | |
1981 | warn("(CTRL) epid enabled and urb (0x%p) processed, ep->sub=0x%p", urb, (char*)TxCtrlEPList[urb_priv->epid].sub); | |
1982 | etrax_usb_complete_urb(urb, 0); | |
1983 | } | |
1984 | } else { | |
1985 | etrax_usb_complete_urb(urb, 0); | |
1986 | } | |
1987 | } | |
1988 | ||
1989 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1990 | ||
1991 | struct usb_iso_packet_descriptor *packet; | |
1992 | ||
1993 | if (urb_priv->urb_state == UNLINK) { | |
1994 | info("Ignoring rx data for urb being unlinked."); | |
1995 | goto skip_out; | |
1996 | } else if (urb_priv->urb_state == NOT_STARTED) { | |
1997 | info("What? Got rx data for urb that isn't started?"); | |
1998 | goto skip_out; | |
1999 | } | |
2000 | ||
2001 | packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter]; | |
2002 | packet->status = 0; | |
2003 | ||
2004 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) { | |
2005 | /* We get nodata for empty data transactions, and the rx descriptor's | |
2006 | hw_len field is not valid in that case. We copy 0 bytes however to | |
2007 | stay in synch. */ | |
2008 | packet->actual_length = 0; | |
2009 | } else { | |
2010 | packet->actual_length = myNextRxDesc->hw_len; | |
2011 | /* Make sure the data fits in the buffer. */ | |
2012 | assert(packet->actual_length <= packet->length); | |
2013 | memcpy(urb->transfer_buffer + packet->offset, | |
2014 | phys_to_virt(myNextRxDesc->buf), packet->actual_length); | |
2015 | } | |
2016 | ||
2017 | /* Increment the packet counter. */ | |
2018 | urb_priv->isoc_packet_counter++; | |
2019 | ||
2020 | /* Note that we don't care about the eot field in the rx descriptor's status. | |
2021 | It will always be set for isoc traffic. */ | |
2022 | if (urb->number_of_packets == urb_priv->isoc_packet_counter) { | |
2023 | ||
2024 | /* Out-of-synch diagnostics. */ | |
2025 | curr_fm = (*R_USB_FM_NUMBER & 0x7ff); | |
2026 | if (((prev_fm + urb_priv->isoc_packet_counter) % (0x7ff + 1)) != curr_fm) { | |
2027 | /* This test is wrong, if there is more than one isoc | |
2028 | in endpoint active it will always calculate wrong | |
2029 | since prev_fm is shared by all endpoints. | |
2030 | ||
2031 | FIXME Make this check per URB using urb->start_frame. | |
2032 | */ | |
2033 | dbg_isoc("Out of synch? Previous frame = %d, current frame = %d", | |
2034 | prev_fm, curr_fm); | |
2035 | ||
2036 | } | |
2037 | prev_fm = curr_fm; | |
2038 | ||
2039 | /* Complete the urb with status OK. */ | |
2040 | etrax_usb_complete_isoc_urb(urb, 0); | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | skip_out: | |
2045 | ||
2046 | /* DMA IN cache bug. Flush the DMA IN buffer from the cache. (struct etrax_dma_descr | |
2047 | has the same layout as USB_IN_Desc for the relevant fields.) */ | |
2048 | prepare_rx_descriptor((struct etrax_dma_descr*)myNextRxDesc); | |
2049 | ||
2050 | myPrevRxDesc = myNextRxDesc; | |
2051 | myPrevRxDesc->command |= IO_MASK(USB_IN_command, eol); | |
2052 | myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol); | |
2053 | myLastRxDesc = myPrevRxDesc; | |
2054 | ||
2055 | myNextRxDesc->status = 0; | |
2056 | myNextRxDesc = phys_to_virt(myNextRxDesc->next); | |
2057 | } | |
2058 | ||
2059 | restore_flags(flags); | |
2060 | ||
2061 | DBFEXIT; | |
2062 | ||
2063 | return IRQ_HANDLED; | |
2064 | } | |
2065 | ||
2066 | ||
2067 | /* This function will unlink the SB descriptors associated with this urb. */ | |
2068 | static int etrax_remove_from_sb_list(struct urb *urb) | |
2069 | { | |
2070 | USB_SB_Desc_t *next_sb, *first_sb, *last_sb; | |
2071 | etrax_urb_priv_t *urb_priv; | |
2072 | int i = 0; | |
2073 | ||
2074 | DBFENTER; | |
2075 | ||
2076 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2077 | assert(urb_priv); | |
2078 | ||
2079 | /* Just a sanity check. Since we don't fiddle with the DMA list the EP descriptor | |
2080 | doesn't really need to be disabled, it's just that we expect it to be. */ | |
2081 | if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
2082 | assert(!(TxBulkEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable))); | |
2083 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
2084 | assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable))); | |
2085 | } | |
2086 | ||
2087 | first_sb = urb_priv->first_sb; | |
2088 | last_sb = urb_priv->last_sb; | |
2089 | ||
2090 | assert(first_sb); | |
2091 | assert(last_sb); | |
2092 | ||
2093 | while (first_sb != last_sb) { | |
2094 | next_sb = (USB_SB_Desc_t *)phys_to_virt(first_sb->next); | |
2095 | kmem_cache_free(usb_desc_cache, first_sb); | |
2096 | first_sb = next_sb; | |
2097 | i++; | |
2098 | } | |
2099 | kmem_cache_free(usb_desc_cache, last_sb); | |
2100 | i++; | |
2101 | dbg_sb("%d SB descriptors freed", i); | |
2102 | /* Compare i with urb->number_of_packets for Isoc traffic. | |
2103 | Should be same when calling unlink_urb */ | |
2104 | ||
2105 | DBFEXIT; | |
2106 | ||
2107 | return i; | |
2108 | } | |
2109 | ||
2110 | static int etrax_usb_submit_bulk_urb(struct urb *urb) | |
2111 | { | |
2112 | int epid; | |
2113 | int empty; | |
2114 | unsigned long flags; | |
2115 | etrax_urb_priv_t *urb_priv; | |
2116 | ||
2117 | DBFENTER; | |
2118 | ||
2119 | /* Epid allocation, empty check and list add must be protected. | |
2120 | Read about this in etrax_usb_submit_ctrl_urb. */ | |
2121 | ||
2122 | spin_lock_irqsave(&urb_list_lock, flags); | |
2123 | epid = etrax_usb_setup_epid(urb); | |
2124 | if (epid == -1) { | |
2125 | DBFEXIT; | |
2126 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2127 | return -ENOMEM; | |
2128 | } | |
2129 | empty = urb_list_empty(epid); | |
2130 | urb_list_add(urb, epid); | |
2131 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2132 | ||
2133 | dbg_bulk("Adding bulk %s urb 0x%lx to %s list, epid %d", | |
2134 | usb_pipein(urb->pipe) ? "IN" : "OUT", (unsigned long)urb, empty ? "empty" : "", epid); | |
2135 | ||
2136 | /* Mark the urb as being in progress. */ | |
2137 | urb->status = -EINPROGRESS; | |
2138 | ||
2139 | /* Setup the hcpriv data. */ | |
2140 | urb_priv = kmalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG); | |
2141 | assert(urb_priv != NULL); | |
2142 | /* This sets rx_offset to 0. */ | |
2143 | memset(urb_priv, 0, sizeof(etrax_urb_priv_t)); | |
2144 | urb_priv->urb_state = NOT_STARTED; | |
2145 | urb->hcpriv = urb_priv; | |
2146 | ||
2147 | if (empty) { | |
2148 | etrax_usb_add_to_bulk_sb_list(urb, epid); | |
2149 | } | |
2150 | ||
2151 | DBFEXIT; | |
2152 | ||
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid) | |
2157 | { | |
2158 | USB_SB_Desc_t *sb_desc; | |
2159 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2160 | unsigned long flags; | |
2161 | char maxlen; | |
2162 | ||
2163 | DBFENTER; | |
2164 | ||
2165 | dbg_bulk("etrax_usb_add_to_bulk_sb_list, urb 0x%lx", (unsigned long)urb); | |
2166 | ||
2167 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
2168 | ||
2169 | sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2170 | assert(sb_desc != NULL); | |
2171 | memset(sb_desc, 0, sizeof(USB_SB_Desc_t)); | |
2172 | ||
2173 | ||
2174 | if (usb_pipeout(urb->pipe)) { | |
2175 | ||
2176 | dbg_bulk("Grabbing bulk OUT, urb 0x%lx, epid %d", (unsigned long)urb, epid); | |
2177 | ||
2178 | /* This is probably a sanity check of the bulk transaction length | |
2179 | not being larger than 64 kB. */ | |
2180 | if (urb->transfer_buffer_length > 0xffff) { | |
2181 | panic("urb->transfer_buffer_length > 0xffff"); | |
2182 | } | |
2183 | ||
2184 | sb_desc->sw_len = urb->transfer_buffer_length; | |
2185 | ||
2186 | /* The rem field is don't care if it's not a full-length transfer, so setting | |
2187 | it shouldn't hurt. Also, rem isn't used for OUT traffic. */ | |
2188 | sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2189 | IO_STATE(USB_SB_command, tt, out) | | |
2190 | IO_STATE(USB_SB_command, eot, yes) | | |
2191 | IO_STATE(USB_SB_command, eol, yes)); | |
2192 | ||
2193 | /* The full field is set to yes, even if we don't actually check that this is | |
2194 | a full-length transfer (i.e., that transfer_buffer_length % maxlen = 0). | |
2195 | Setting full prevents the USB controller from sending an empty packet in | |
2196 | that case. However, if URB_ZERO_PACKET was set we want that. */ | |
2197 | if (!(urb->transfer_flags & URB_ZERO_PACKET)) { | |
2198 | sb_desc->command |= IO_STATE(USB_SB_command, full, yes); | |
2199 | } | |
2200 | ||
2201 | sb_desc->buf = virt_to_phys(urb->transfer_buffer); | |
2202 | sb_desc->next = 0; | |
2203 | ||
2204 | } else if (usb_pipein(urb->pipe)) { | |
2205 | ||
2206 | dbg_bulk("Grabbing bulk IN, urb 0x%lx, epid %d", (unsigned long)urb, epid); | |
2207 | ||
2208 | sb_desc->sw_len = urb->transfer_buffer_length ? | |
2209 | (urb->transfer_buffer_length - 1) / maxlen + 1 : 0; | |
2210 | ||
2211 | /* The rem field is don't care if it's not a full-length transfer, so setting | |
2212 | it shouldn't hurt. */ | |
2213 | sb_desc->command = | |
2214 | (IO_FIELD(USB_SB_command, rem, | |
2215 | urb->transfer_buffer_length % maxlen) | | |
2216 | IO_STATE(USB_SB_command, tt, in) | | |
2217 | IO_STATE(USB_SB_command, eot, yes) | | |
2218 | IO_STATE(USB_SB_command, eol, yes)); | |
2219 | ||
2220 | sb_desc->buf = 0; | |
2221 | sb_desc->next = 0; | |
2222 | } | |
2223 | ||
2224 | urb_priv->first_sb = sb_desc; | |
2225 | urb_priv->last_sb = sb_desc; | |
2226 | urb_priv->epid = epid; | |
2227 | ||
2228 | urb->hcpriv = urb_priv; | |
2229 | ||
2230 | /* Reset toggle bits and reset error count. */ | |
2231 | save_flags(flags); | |
2232 | cli(); | |
2233 | ||
2234 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2235 | nop(); | |
2236 | ||
2237 | /* FIXME: Is this a special case since the hold field is checked, | |
2238 | or should we check hold in a lot of other cases as well? */ | |
2239 | if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) { | |
2240 | panic("Hold was set in %s", __FUNCTION__); | |
2241 | } | |
2242 | ||
2243 | /* Reset error counters (regardless of which direction this traffic is). */ | |
2244 | *R_USB_EPT_DATA &= | |
2245 | ~(IO_MASK(R_USB_EPT_DATA, error_count_in) | | |
2246 | IO_MASK(R_USB_EPT_DATA, error_count_out)); | |
2247 | ||
2248 | /* Software must preset the toggle bits. */ | |
2249 | if (usb_pipeout(urb->pipe)) { | |
2250 | char toggle = | |
2251 | usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)); | |
2252 | *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out); | |
2253 | *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle); | |
2254 | } else { | |
2255 | char toggle = | |
2256 | usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)); | |
2257 | *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in); | |
2258 | *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle); | |
2259 | } | |
2260 | ||
2261 | /* Assert that the EP descriptor is disabled. */ | |
2262 | assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
2263 | ||
2264 | /* The reason we set the EP's sub pointer directly instead of | |
2265 | walking the SB list and linking it last in the list is that we only | |
2266 | have one active urb at a time (the rest are queued). */ | |
2267 | ||
2268 | /* Note that we cannot have interrupts running when we have set the SB descriptor | |
2269 | but the EP is not yet enabled. If a bulk eot happens for another EP, we will | |
2270 | find this EP disabled and with a SB != 0, which will make us think that it's done. */ | |
2271 | TxBulkEPList[epid].sub = virt_to_phys(sb_desc); | |
2272 | TxBulkEPList[epid].hw_len = 0; | |
2273 | /* Note that we don't have to fill in the ep_id field since this | |
2274 | was done when we allocated the EP descriptors in init_tx_bulk_ep. */ | |
2275 | ||
2276 | /* Check if the dummy list is already with us (if several urbs were queued). */ | |
2277 | if (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0])) { | |
2278 | ||
2279 | dbg_bulk("Inviting dummy list to the party for urb 0x%lx, epid %d", | |
2280 | (unsigned long)urb, epid); | |
2281 | ||
2282 | /* The last EP in the dummy list already has its next pointer set to | |
2283 | TxBulkEPList[epid].next. */ | |
2284 | ||
2285 | /* We don't need to check if the DMA is at this EP or not before changing the | |
2286 | next pointer, since we will do it in one 32-bit write (EP descriptors are | |
2287 | 32-bit aligned). */ | |
2288 | TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]); | |
2289 | } | |
2290 | /* Enable the EP descr. */ | |
2291 | dbg_bulk("Enabling bulk EP for urb 0x%lx, epid %d", (unsigned long)urb, epid); | |
2292 | TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
2293 | ||
2294 | /* Everything is set up, safe to enable interrupts again. */ | |
2295 | restore_flags(flags); | |
2296 | ||
2297 | /* If the DMA bulk channel isn't running, we need to restart it if it | |
2298 | has stopped at the last EP descriptor (DMA stopped because there was | |
2299 | no more traffic) or if it has stopped at a dummy EP with the intr flag | |
2300 | set (DMA stopped because we were too slow in inserting new traffic). */ | |
2301 | if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) { | |
2302 | ||
2303 | USB_EP_Desc_t *ep; | |
2304 | ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP); | |
2305 | dbg_bulk("DMA channel not running in add"); | |
2306 | dbg_bulk("DMA is at 0x%lx", (unsigned long)ep); | |
2307 | ||
2308 | if (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[NBR_OF_EPIDS - 1]) || | |
2309 | (ep->command & 0x8) >> 3) { | |
2310 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); | |
2311 | /* Update/restart the bulk start timer since we just started the channel. */ | |
2312 | mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL); | |
2313 | /* Update/restart the bulk eot timer since we just inserted traffic. */ | |
2314 | mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL); | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | DBFEXIT; | |
2319 | } | |
2320 | ||
2321 | static void etrax_usb_complete_bulk_urb(struct urb *urb, int status) | |
2322 | { | |
2323 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2324 | int epid = urb_priv->epid; | |
2325 | unsigned long flags; | |
2326 | ||
2327 | DBFENTER; | |
2328 | ||
2329 | if (status) | |
2330 | warn("Completing bulk urb with status %d.", status); | |
2331 | ||
2332 | dbg_bulk("Completing bulk urb 0x%lx for epid %d", (unsigned long)urb, epid); | |
2333 | ||
2334 | /* Update the urb list. */ | |
2335 | urb_list_del(urb, epid); | |
2336 | ||
2337 | /* For an IN pipe, we always set the actual length, regardless of whether there was | |
2338 | an error or not (which means the device driver can use the data if it wants to). */ | |
2339 | if (usb_pipein(urb->pipe)) { | |
2340 | urb->actual_length = urb_priv->rx_offset; | |
2341 | } else { | |
2342 | /* Set actual_length for OUT urbs also; the USB mass storage driver seems | |
2343 | to want that. We wouldn't know of any partial writes if there was an error. */ | |
2344 | if (status == 0) { | |
2345 | urb->actual_length = urb->transfer_buffer_length; | |
2346 | } else { | |
2347 | urb->actual_length = 0; | |
2348 | } | |
2349 | } | |
2350 | ||
2351 | /* FIXME: Is there something of the things below we shouldn't do if there was an error? | |
2352 | Like, maybe we shouldn't toggle the toggle bits, or maybe we shouldn't insert more traffic. */ | |
2353 | ||
2354 | save_flags(flags); | |
2355 | cli(); | |
2356 | ||
2357 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2358 | nop(); | |
2359 | ||
2360 | /* We need to fiddle with the toggle bits because the hardware doesn't do it for us. */ | |
2361 | if (usb_pipeout(urb->pipe)) { | |
2362 | char toggle = | |
2363 | IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA); | |
2364 | usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), | |
2365 | usb_pipeout(urb->pipe), toggle); | |
2366 | } else { | |
2367 | char toggle = | |
2368 | IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA); | |
2369 | usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), | |
2370 | usb_pipeout(urb->pipe), toggle); | |
2371 | } | |
2372 | restore_flags(flags); | |
2373 | ||
2374 | /* Remember to free the SBs. */ | |
2375 | etrax_remove_from_sb_list(urb); | |
2376 | kfree(urb_priv); | |
2377 | urb->hcpriv = 0; | |
2378 | ||
2379 | /* If there are any more urb's in the list we'd better start sending */ | |
2380 | if (!urb_list_empty(epid)) { | |
2381 | ||
2382 | struct urb *new_urb; | |
2383 | ||
2384 | /* Get the first urb. */ | |
2385 | new_urb = urb_list_first(epid); | |
2386 | assert(new_urb); | |
2387 | ||
2388 | dbg_bulk("More bulk for epid %d", epid); | |
2389 | ||
2390 | etrax_usb_add_to_bulk_sb_list(new_urb, epid); | |
2391 | } | |
2392 | ||
2393 | urb->status = status; | |
2394 | ||
2395 | /* We let any non-zero status from the layer above have precedence. */ | |
2396 | if (status == 0) { | |
2397 | /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length) | |
2398 | is to be treated as an error. */ | |
2399 | if (urb->transfer_flags & URB_SHORT_NOT_OK) { | |
2400 | if (usb_pipein(urb->pipe) && | |
2401 | (urb->actual_length != | |
2402 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) { | |
2403 | urb->status = -EREMOTEIO; | |
2404 | } | |
2405 | } | |
2406 | } | |
2407 | ||
2408 | if (urb->complete) { | |
2409 | urb->complete(urb, NULL); | |
2410 | } | |
2411 | ||
2412 | if (urb_list_empty(epid)) { | |
2413 | /* This means that this EP is now free, deconfigure it. */ | |
2414 | etrax_usb_free_epid(epid); | |
2415 | ||
2416 | /* No more traffic; time to clean up. | |
2417 | Must set sub pointer to 0, since we look at the sub pointer when handling | |
2418 | the bulk eot interrupt. */ | |
2419 | ||
2420 | dbg_bulk("No bulk for epid %d", epid); | |
2421 | ||
2422 | TxBulkEPList[epid].sub = 0; | |
2423 | ||
2424 | /* Unlink the dummy list. */ | |
2425 | ||
2426 | dbg_bulk("Kicking dummy list out of party for urb 0x%lx, epid %d", | |
2427 | (unsigned long)urb, epid); | |
2428 | ||
2429 | /* No need to wait for the DMA before changing the next pointer. | |
2430 | The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use | |
2431 | the last one (INVALID_EPID) for actual traffic. */ | |
2432 | TxBulkEPList[epid].next = | |
2433 | virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]); | |
2434 | } | |
2435 | ||
2436 | DBFEXIT; | |
2437 | } | |
2438 | ||
2439 | static int etrax_usb_submit_ctrl_urb(struct urb *urb) | |
2440 | { | |
2441 | int epid; | |
2442 | int empty; | |
2443 | unsigned long flags; | |
2444 | etrax_urb_priv_t *urb_priv; | |
2445 | ||
2446 | DBFENTER; | |
2447 | ||
2448 | /* FIXME: Return -ENXIO if there is already a queued urb for this endpoint? */ | |
2449 | ||
2450 | /* Epid allocation, empty check and list add must be protected. | |
2451 | ||
2452 | Epid allocation because if we find an existing epid for this endpoint an urb might be | |
2453 | completed (emptying the list) before we add the new urb to the list, causing the epid | |
2454 | to be de-allocated. We would then start the transfer with an invalid epid -> epid attn. | |
2455 | ||
2456 | Empty check and add because otherwise we might conclude that the list is not empty, | |
2457 | after which it becomes empty before we add the new urb to the list, causing us not to | |
2458 | insert the new traffic into the SB list. */ | |
2459 | ||
2460 | spin_lock_irqsave(&urb_list_lock, flags); | |
2461 | epid = etrax_usb_setup_epid(urb); | |
2462 | if (epid == -1) { | |
2463 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2464 | DBFEXIT; | |
2465 | return -ENOMEM; | |
2466 | } | |
2467 | empty = urb_list_empty(epid); | |
2468 | urb_list_add(urb, epid); | |
2469 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2470 | ||
2471 | dbg_ctrl("Adding ctrl urb 0x%lx to %s list, epid %d", | |
2472 | (unsigned long)urb, empty ? "empty" : "", epid); | |
2473 | ||
2474 | /* Mark the urb as being in progress. */ | |
2475 | urb->status = -EINPROGRESS; | |
2476 | ||
2477 | /* Setup the hcpriv data. */ | |
2478 | urb_priv = kmalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG); | |
2479 | assert(urb_priv != NULL); | |
2480 | /* This sets rx_offset to 0. */ | |
2481 | memset(urb_priv, 0, sizeof(etrax_urb_priv_t)); | |
2482 | urb_priv->urb_state = NOT_STARTED; | |
2483 | urb->hcpriv = urb_priv; | |
2484 | ||
2485 | if (empty) { | |
2486 | etrax_usb_add_to_ctrl_sb_list(urb, epid); | |
2487 | } | |
2488 | ||
2489 | DBFEXIT; | |
2490 | ||
2491 | return 0; | |
2492 | } | |
2493 | ||
2494 | static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid) | |
2495 | { | |
2496 | USB_SB_Desc_t *sb_desc_setup; | |
2497 | USB_SB_Desc_t *sb_desc_data; | |
2498 | USB_SB_Desc_t *sb_desc_status; | |
2499 | ||
2500 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2501 | ||
2502 | unsigned long flags; | |
2503 | char maxlen; | |
2504 | ||
2505 | DBFENTER; | |
2506 | ||
2507 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
2508 | ||
2509 | sb_desc_setup = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2510 | assert(sb_desc_setup != NULL); | |
2511 | sb_desc_status = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2512 | assert(sb_desc_status != NULL); | |
2513 | ||
2514 | /* Initialize the mandatory setup SB descriptor (used only in control transfers) */ | |
2515 | sb_desc_setup->sw_len = 8; | |
2516 | sb_desc_setup->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2517 | IO_STATE(USB_SB_command, tt, setup) | | |
2518 | IO_STATE(USB_SB_command, full, yes) | | |
2519 | IO_STATE(USB_SB_command, eot, yes)); | |
2520 | ||
2521 | sb_desc_setup->buf = virt_to_phys(urb->setup_packet); | |
2522 | ||
2523 | if (usb_pipeout(urb->pipe)) { | |
2524 | dbg_ctrl("Transfer for epid %d is OUT", epid); | |
2525 | ||
2526 | /* If this Control OUT transfer has an optional data stage we add an OUT token | |
2527 | before the mandatory IN (status) token, hence the reordered SB list */ | |
2528 | ||
2529 | sb_desc_setup->next = virt_to_phys(sb_desc_status); | |
2530 | if (urb->transfer_buffer) { | |
2531 | ||
2532 | dbg_ctrl("This OUT transfer has an extra data stage"); | |
2533 | ||
2534 | sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2535 | assert(sb_desc_data != NULL); | |
2536 | ||
2537 | sb_desc_setup->next = virt_to_phys(sb_desc_data); | |
2538 | ||
2539 | sb_desc_data->sw_len = urb->transfer_buffer_length; | |
2540 | sb_desc_data->command = (IO_STATE(USB_SB_command, tt, out) | | |
2541 | IO_STATE(USB_SB_command, full, yes) | | |
2542 | IO_STATE(USB_SB_command, eot, yes)); | |
2543 | sb_desc_data->buf = virt_to_phys(urb->transfer_buffer); | |
2544 | sb_desc_data->next = virt_to_phys(sb_desc_status); | |
2545 | } | |
2546 | ||
2547 | sb_desc_status->sw_len = 1; | |
2548 | sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2549 | IO_STATE(USB_SB_command, tt, in) | | |
2550 | IO_STATE(USB_SB_command, eot, yes) | | |
2551 | IO_STATE(USB_SB_command, intr, yes) | | |
2552 | IO_STATE(USB_SB_command, eol, yes)); | |
2553 | ||
2554 | sb_desc_status->buf = 0; | |
2555 | sb_desc_status->next = 0; | |
2556 | ||
2557 | } else if (usb_pipein(urb->pipe)) { | |
2558 | ||
2559 | dbg_ctrl("Transfer for epid %d is IN", epid); | |
2560 | dbg_ctrl("transfer_buffer_length = %d", urb->transfer_buffer_length); | |
2561 | dbg_ctrl("rem is calculated to %d", urb->transfer_buffer_length % maxlen); | |
2562 | ||
2563 | sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2564 | assert(sb_desc_data != NULL); | |
2565 | ||
2566 | sb_desc_setup->next = virt_to_phys(sb_desc_data); | |
2567 | ||
2568 | sb_desc_data->sw_len = urb->transfer_buffer_length ? | |
2569 | (urb->transfer_buffer_length - 1) / maxlen + 1 : 0; | |
2570 | dbg_ctrl("sw_len got %d", sb_desc_data->sw_len); | |
2571 | ||
2572 | sb_desc_data->command = | |
2573 | (IO_FIELD(USB_SB_command, rem, | |
2574 | urb->transfer_buffer_length % maxlen) | | |
2575 | IO_STATE(USB_SB_command, tt, in) | | |
2576 | IO_STATE(USB_SB_command, eot, yes)); | |
2577 | ||
2578 | sb_desc_data->buf = 0; | |
2579 | sb_desc_data->next = virt_to_phys(sb_desc_status); | |
2580 | ||
2581 | /* Read comment at zout_buffer declaration for an explanation to this. */ | |
2582 | sb_desc_status->sw_len = 1; | |
2583 | sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2584 | IO_STATE(USB_SB_command, tt, zout) | | |
2585 | IO_STATE(USB_SB_command, full, yes) | | |
2586 | IO_STATE(USB_SB_command, eot, yes) | | |
2587 | IO_STATE(USB_SB_command, intr, yes) | | |
2588 | IO_STATE(USB_SB_command, eol, yes)); | |
2589 | ||
2590 | sb_desc_status->buf = virt_to_phys(&zout_buffer[0]); | |
2591 | sb_desc_status->next = 0; | |
2592 | } | |
2593 | ||
2594 | urb_priv->first_sb = sb_desc_setup; | |
2595 | urb_priv->last_sb = sb_desc_status; | |
2596 | urb_priv->epid = epid; | |
2597 | ||
2598 | urb_priv->urb_state = STARTED; | |
2599 | ||
2600 | /* Reset toggle bits and reset error count, remember to di and ei */ | |
2601 | /* Warning: it is possible that this locking doesn't work with bottom-halves */ | |
2602 | ||
2603 | save_flags(flags); | |
2604 | cli(); | |
2605 | ||
2606 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2607 | nop(); | |
2608 | if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) { | |
2609 | panic("Hold was set in %s", __FUNCTION__); | |
2610 | } | |
2611 | ||
2612 | ||
2613 | /* FIXME: Compare with etrax_usb_add_to_bulk_sb_list where the toggle bits | |
2614 | are set to a specific value. Why the difference? Read "Transfer and Toggle Bits | |
2615 | in Designer's Reference, p. 8 - 11. */ | |
2616 | *R_USB_EPT_DATA &= | |
2617 | ~(IO_MASK(R_USB_EPT_DATA, error_count_in) | | |
2618 | IO_MASK(R_USB_EPT_DATA, error_count_out) | | |
2619 | IO_MASK(R_USB_EPT_DATA, t_in) | | |
2620 | IO_MASK(R_USB_EPT_DATA, t_out)); | |
2621 | ||
2622 | /* Since we use the rx interrupt to complete ctrl urbs, we can enable interrupts now | |
2623 | (i.e. we don't check the sub pointer on an eot interrupt like we do for bulk traffic). */ | |
2624 | restore_flags(flags); | |
2625 | ||
2626 | /* Assert that the EP descriptor is disabled. */ | |
2627 | assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
2628 | ||
2629 | /* Set up and enable the EP descriptor. */ | |
2630 | TxCtrlEPList[epid].sub = virt_to_phys(sb_desc_setup); | |
2631 | TxCtrlEPList[epid].hw_len = 0; | |
2632 | TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
2633 | ||
2634 | /* We start the DMA sub channel without checking if it's running or not, because: | |
2635 | 1) If it's already running, issuing the start command is a nop. | |
2636 | 2) We avoid a test-and-set race condition. */ | |
2637 | *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start); | |
2638 | ||
2639 | DBFEXIT; | |
2640 | } | |
2641 | ||
2642 | static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status) | |
2643 | { | |
2644 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2645 | int epid = urb_priv->epid; | |
2646 | ||
2647 | DBFENTER; | |
2648 | ||
2649 | if (status) | |
2650 | warn("Completing ctrl urb with status %d.", status); | |
2651 | ||
2652 | dbg_ctrl("Completing ctrl epid %d, urb 0x%lx", epid, (unsigned long)urb); | |
2653 | ||
2654 | /* Remove this urb from the list. */ | |
2655 | urb_list_del(urb, epid); | |
2656 | ||
2657 | /* For an IN pipe, we always set the actual length, regardless of whether there was | |
2658 | an error or not (which means the device driver can use the data if it wants to). */ | |
2659 | if (usb_pipein(urb->pipe)) { | |
2660 | urb->actual_length = urb_priv->rx_offset; | |
2661 | } | |
2662 | ||
2663 | /* FIXME: Is there something of the things below we shouldn't do if there was an error? | |
2664 | Like, maybe we shouldn't insert more traffic. */ | |
2665 | ||
2666 | /* Remember to free the SBs. */ | |
2667 | etrax_remove_from_sb_list(urb); | |
2668 | kfree(urb_priv); | |
2669 | urb->hcpriv = 0; | |
2670 | ||
2671 | /* If there are any more urbs in the list we'd better start sending. */ | |
2672 | if (!urb_list_empty(epid)) { | |
2673 | struct urb *new_urb; | |
2674 | ||
2675 | /* Get the first urb. */ | |
2676 | new_urb = urb_list_first(epid); | |
2677 | assert(new_urb); | |
2678 | ||
2679 | dbg_ctrl("More ctrl for epid %d, first urb = 0x%lx", epid, (unsigned long)new_urb); | |
2680 | ||
2681 | etrax_usb_add_to_ctrl_sb_list(new_urb, epid); | |
2682 | } | |
2683 | ||
2684 | urb->status = status; | |
2685 | ||
2686 | /* We let any non-zero status from the layer above have precedence. */ | |
2687 | if (status == 0) { | |
2688 | /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length) | |
2689 | is to be treated as an error. */ | |
2690 | if (urb->transfer_flags & URB_SHORT_NOT_OK) { | |
2691 | if (usb_pipein(urb->pipe) && | |
2692 | (urb->actual_length != | |
2693 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) { | |
2694 | urb->status = -EREMOTEIO; | |
2695 | } | |
2696 | } | |
2697 | } | |
2698 | ||
2699 | if (urb->complete) { | |
2700 | urb->complete(urb, NULL); | |
2701 | } | |
2702 | ||
2703 | if (urb_list_empty(epid)) { | |
2704 | /* No more traffic. Time to clean up. */ | |
2705 | etrax_usb_free_epid(epid); | |
2706 | /* Must set sub pointer to 0. */ | |
2707 | dbg_ctrl("No ctrl for epid %d", epid); | |
2708 | TxCtrlEPList[epid].sub = 0; | |
2709 | } | |
2710 | ||
2711 | DBFEXIT; | |
2712 | } | |
2713 | ||
2714 | static int etrax_usb_submit_intr_urb(struct urb *urb) | |
2715 | { | |
2716 | ||
2717 | int epid; | |
2718 | ||
2719 | DBFENTER; | |
2720 | ||
2721 | if (usb_pipeout(urb->pipe)) { | |
2722 | /* Unsupported transfer type. | |
2723 | We don't support interrupt out traffic. (If we do, we can't support | |
2724 | intervals for neither in or out traffic, but are forced to schedule all | |
2725 | interrupt traffic in one frame.) */ | |
2726 | return -EINVAL; | |
2727 | } | |
2728 | ||
2729 | epid = etrax_usb_setup_epid(urb); | |
2730 | if (epid == -1) { | |
2731 | DBFEXIT; | |
2732 | return -ENOMEM; | |
2733 | } | |
2734 | ||
2735 | if (!urb_list_empty(epid)) { | |
2736 | /* There is already a queued urb for this endpoint. */ | |
2737 | etrax_usb_free_epid(epid); | |
2738 | return -ENXIO; | |
2739 | } | |
2740 | ||
2741 | urb->status = -EINPROGRESS; | |
2742 | ||
2743 | dbg_intr("Add intr urb 0x%lx, to list, epid %d", (unsigned long)urb, epid); | |
2744 | ||
2745 | urb_list_add(urb, epid); | |
2746 | etrax_usb_add_to_intr_sb_list(urb, epid); | |
2747 | ||
2748 | return 0; | |
2749 | ||
2750 | DBFEXIT; | |
2751 | } | |
2752 | ||
2753 | static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid) | |
2754 | { | |
2755 | ||
2756 | volatile USB_EP_Desc_t *tmp_ep; | |
2757 | volatile USB_EP_Desc_t *first_ep; | |
2758 | ||
2759 | char maxlen; | |
2760 | int interval; | |
2761 | int i; | |
2762 | ||
2763 | etrax_urb_priv_t *urb_priv; | |
2764 | ||
2765 | DBFENTER; | |
2766 | ||
2767 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
2768 | interval = urb->interval; | |
2769 | ||
2770 | urb_priv = kmalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG); | |
2771 | assert(urb_priv != NULL); | |
2772 | memset(urb_priv, 0, sizeof(etrax_urb_priv_t)); | |
2773 | urb->hcpriv = urb_priv; | |
2774 | ||
2775 | first_ep = &TxIntrEPList[0]; | |
2776 | ||
2777 | /* Round of the interval to 2^n, it is obvious that this code favours | |
2778 | smaller numbers, but that is actually a good thing */ | |
2779 | /* FIXME: The "rounding error" for larger intervals will be quite | |
2780 | large. For in traffic this shouldn't be a problem since it will only | |
2781 | mean that we "poll" more often. */ | |
2782 | for (i = 0; interval; i++) { | |
2783 | interval = interval >> 1; | |
2784 | } | |
2785 | interval = 1 << (i - 1); | |
2786 | ||
2787 | dbg_intr("Interval rounded to %d", interval); | |
2788 | ||
2789 | tmp_ep = first_ep; | |
2790 | i = 0; | |
2791 | do { | |
2792 | if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) { | |
2793 | if ((i % interval) == 0) { | |
2794 | /* Insert the traffic ep after tmp_ep */ | |
2795 | USB_EP_Desc_t *ep_desc; | |
2796 | USB_SB_Desc_t *sb_desc; | |
2797 | ||
2798 | dbg_intr("Inserting EP for epid %d", epid); | |
2799 | ||
2800 | ep_desc = (USB_EP_Desc_t *) | |
2801 | kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2802 | sb_desc = (USB_SB_Desc_t *) | |
2803 | kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2804 | assert(ep_desc != NULL); | |
2805 | CHECK_ALIGN(ep_desc); | |
2806 | assert(sb_desc != NULL); | |
2807 | ||
2808 | ep_desc->sub = virt_to_phys(sb_desc); | |
2809 | ep_desc->hw_len = 0; | |
2810 | ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) | | |
2811 | IO_STATE(USB_EP_command, enable, yes)); | |
2812 | ||
2813 | ||
2814 | /* Round upwards the number of packets of size maxlen | |
2815 | that this SB descriptor should receive. */ | |
2816 | sb_desc->sw_len = urb->transfer_buffer_length ? | |
2817 | (urb->transfer_buffer_length - 1) / maxlen + 1 : 0; | |
2818 | sb_desc->next = 0; | |
2819 | sb_desc->buf = 0; | |
2820 | sb_desc->command = | |
2821 | (IO_FIELD(USB_SB_command, rem, urb->transfer_buffer_length % maxlen) | | |
2822 | IO_STATE(USB_SB_command, tt, in) | | |
2823 | IO_STATE(USB_SB_command, eot, yes) | | |
2824 | IO_STATE(USB_SB_command, eol, yes)); | |
2825 | ||
2826 | ep_desc->next = tmp_ep->next; | |
2827 | tmp_ep->next = virt_to_phys(ep_desc); | |
2828 | } | |
2829 | i++; | |
2830 | } | |
2831 | tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next); | |
2832 | } while (tmp_ep != first_ep); | |
2833 | ||
2834 | ||
2835 | /* Note that first_sb/last_sb doesn't apply to interrupt traffic. */ | |
2836 | urb_priv->epid = epid; | |
2837 | ||
2838 | /* We start the DMA sub channel without checking if it's running or not, because: | |
2839 | 1) If it's already running, issuing the start command is a nop. | |
2840 | 2) We avoid a test-and-set race condition. */ | |
2841 | *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start); | |
2842 | ||
2843 | DBFEXIT; | |
2844 | } | |
2845 | ||
2846 | ||
2847 | ||
2848 | static void etrax_usb_complete_intr_urb(struct urb *urb, int status) | |
2849 | { | |
2850 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2851 | int epid = urb_priv->epid; | |
2852 | ||
2853 | DBFENTER; | |
2854 | ||
2855 | if (status) | |
2856 | warn("Completing intr urb with status %d.", status); | |
2857 | ||
2858 | dbg_intr("Completing intr epid %d, urb 0x%lx", epid, (unsigned long)urb); | |
2859 | ||
2860 | urb->status = status; | |
2861 | urb->actual_length = urb_priv->rx_offset; | |
2862 | ||
2863 | dbg_intr("interrupt urb->actual_length = %d", urb->actual_length); | |
2864 | ||
2865 | /* We let any non-zero status from the layer above have precedence. */ | |
2866 | if (status == 0) { | |
2867 | /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length) | |
2868 | is to be treated as an error. */ | |
2869 | if (urb->transfer_flags & URB_SHORT_NOT_OK) { | |
2870 | if (urb->actual_length != | |
2871 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) { | |
2872 | urb->status = -EREMOTEIO; | |
2873 | } | |
2874 | } | |
2875 | } | |
2876 | ||
2877 | /* The driver will resubmit the URB so we need to remove it first */ | |
2878 | etrax_usb_unlink_urb(urb, 0); | |
2879 | if (urb->complete) { | |
2880 | urb->complete(urb, NULL); | |
2881 | } | |
2882 | ||
2883 | DBFEXIT; | |
2884 | } | |
2885 | ||
2886 | ||
2887 | static int etrax_usb_submit_isoc_urb(struct urb *urb) | |
2888 | { | |
2889 | int epid; | |
2890 | unsigned long flags; | |
2891 | ||
2892 | DBFENTER; | |
2893 | ||
2894 | dbg_isoc("Submitting isoc urb = 0x%lx", (unsigned long)urb); | |
2895 | ||
2896 | /* Epid allocation, empty check and list add must be protected. | |
2897 | Read about this in etrax_usb_submit_ctrl_urb. */ | |
2898 | ||
2899 | spin_lock_irqsave(&urb_list_lock, flags); | |
2900 | /* Is there an active epid for this urb ? */ | |
2901 | epid = etrax_usb_setup_epid(urb); | |
2902 | if (epid == -1) { | |
2903 | DBFEXIT; | |
2904 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2905 | return -ENOMEM; | |
2906 | } | |
2907 | ||
2908 | /* Ok, now we got valid endpoint, lets insert some traffic */ | |
2909 | ||
2910 | urb->status = -EINPROGRESS; | |
2911 | ||
2912 | /* Find the last urb in the URB_List and add this urb after that one. | |
2913 | Also add the traffic, that is do an etrax_usb_add_to_isoc_sb_list. This | |
2914 | is important to make this in "real time" since isochronous traffic is | |
2915 | time sensitive. */ | |
2916 | ||
2917 | dbg_isoc("Adding isoc urb to (possibly empty) list"); | |
2918 | urb_list_add(urb, epid); | |
2919 | etrax_usb_add_to_isoc_sb_list(urb, epid); | |
2920 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2921 | ||
2922 | DBFEXIT; | |
2923 | ||
2924 | return 0; | |
2925 | } | |
2926 | ||
2927 | static void etrax_usb_check_error_isoc_ep(const int epid) | |
2928 | { | |
2929 | unsigned long int flags; | |
2930 | int error_code; | |
2931 | __u32 r_usb_ept_data; | |
2932 | ||
2933 | /* We can't read R_USB_EPID_ATTN here since it would clear the iso_eof, | |
2934 | bulk_eot and epid_attn interrupts. So we just check the status of | |
2935 | the epid without testing if for it in R_USB_EPID_ATTN. */ | |
2936 | ||
2937 | ||
2938 | save_flags(flags); | |
2939 | cli(); | |
2940 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2941 | nop(); | |
2942 | /* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO | |
2943 | registers, they are located at the same address and are of the same size. | |
2944 | In other words, this read should be ok for isoc also. */ | |
2945 | r_usb_ept_data = *R_USB_EPT_DATA; | |
2946 | restore_flags(flags); | |
2947 | ||
2948 | error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data); | |
2949 | ||
2950 | if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) { | |
2951 | warn("Hold was set for epid %d.", epid); | |
2952 | return; | |
2953 | } | |
2954 | ||
2955 | if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, no_error)) { | |
2956 | ||
2957 | /* This indicates that the SB list of the ept was completed before | |
2958 | new data was appended to it. This is not an error, but indicates | |
2959 | large system or USB load and could possibly cause trouble for | |
2960 | very timing sensitive USB device drivers so we log it. | |
2961 | */ | |
2962 | info("Isoc. epid %d disabled with no error", epid); | |
2963 | return; | |
2964 | ||
2965 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, stall)) { | |
2966 | /* Not really a protocol error, just says that the endpoint gave | |
2967 | a stall response. Note that error_code cannot be stall for isoc. */ | |
2968 | panic("Isoc traffic cannot stall"); | |
2969 | ||
2970 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, bus_error)) { | |
2971 | /* Two devices responded to a transaction request. Must be resolved | |
2972 | by software. FIXME: Reset ports? */ | |
2973 | panic("Bus error for epid %d." | |
2974 | " Two devices responded to transaction request", | |
2975 | epid); | |
2976 | ||
2977 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) { | |
2978 | /* DMA overrun or underrun. */ | |
2979 | warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid); | |
2980 | ||
2981 | /* It seems that error_code = buffer_error in | |
2982 | R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS | |
2983 | are the same error. */ | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | ||
2988 | static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid) | |
2989 | { | |
2990 | ||
2991 | int i = 0; | |
2992 | ||
2993 | etrax_urb_priv_t *urb_priv; | |
2994 | USB_SB_Desc_t *prev_sb_desc, *next_sb_desc, *temp_sb_desc; | |
2995 | ||
2996 | DBFENTER; | |
2997 | ||
2998 | prev_sb_desc = next_sb_desc = temp_sb_desc = NULL; | |
2999 | ||
3000 | urb_priv = kmalloc(sizeof(etrax_urb_priv_t), GFP_ATOMIC); | |
3001 | assert(urb_priv != NULL); | |
3002 | memset(urb_priv, 0, sizeof(etrax_urb_priv_t)); | |
3003 | ||
3004 | urb->hcpriv = urb_priv; | |
3005 | urb_priv->epid = epid; | |
3006 | ||
3007 | if (usb_pipeout(urb->pipe)) { | |
3008 | ||
3009 | if (urb->number_of_packets == 0) panic("etrax_usb_add_to_isoc_sb_list 0 packets\n"); | |
3010 | ||
3011 | dbg_isoc("Transfer for epid %d is OUT", epid); | |
3012 | dbg_isoc("%d packets in URB", urb->number_of_packets); | |
3013 | ||
3014 | /* Create one SB descriptor for each packet and link them together. */ | |
3015 | for (i = 0; i < urb->number_of_packets; i++) { | |
3016 | if (!urb->iso_frame_desc[i].length) | |
3017 | continue; | |
3018 | ||
3019 | next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_ATOMIC); | |
3020 | assert(next_sb_desc != NULL); | |
3021 | ||
3022 | if (urb->iso_frame_desc[i].length > 0) { | |
3023 | ||
3024 | next_sb_desc->command = (IO_STATE(USB_SB_command, tt, out) | | |
3025 | IO_STATE(USB_SB_command, eot, yes)); | |
3026 | ||
3027 | next_sb_desc->sw_len = urb->iso_frame_desc[i].length; | |
3028 | next_sb_desc->buf = virt_to_phys((char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset); | |
3029 | ||
3030 | /* Check if full length transfer. */ | |
3031 | if (urb->iso_frame_desc[i].length == | |
3032 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) { | |
3033 | next_sb_desc->command |= IO_STATE(USB_SB_command, full, yes); | |
3034 | } | |
3035 | } else { | |
3036 | dbg_isoc("zero len packet"); | |
3037 | next_sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
3038 | IO_STATE(USB_SB_command, tt, zout) | | |
3039 | IO_STATE(USB_SB_command, eot, yes) | | |
3040 | IO_STATE(USB_SB_command, full, yes)); | |
3041 | ||
3042 | next_sb_desc->sw_len = 1; | |
3043 | next_sb_desc->buf = virt_to_phys(&zout_buffer[0]); | |
3044 | } | |
3045 | ||
3046 | /* First SB descriptor that belongs to this urb */ | |
3047 | if (i == 0) | |
3048 | urb_priv->first_sb = next_sb_desc; | |
3049 | else | |
3050 | prev_sb_desc->next = virt_to_phys(next_sb_desc); | |
3051 | ||
3052 | prev_sb_desc = next_sb_desc; | |
3053 | } | |
3054 | ||
3055 | next_sb_desc->command |= (IO_STATE(USB_SB_command, intr, yes) | | |
3056 | IO_STATE(USB_SB_command, eol, yes)); | |
3057 | next_sb_desc->next = 0; | |
3058 | urb_priv->last_sb = next_sb_desc; | |
3059 | ||
3060 | } else if (usb_pipein(urb->pipe)) { | |
3061 | ||
3062 | dbg_isoc("Transfer for epid %d is IN", epid); | |
3063 | dbg_isoc("transfer_buffer_length = %d", urb->transfer_buffer_length); | |
3064 | dbg_isoc("rem is calculated to %d", urb->iso_frame_desc[urb->number_of_packets - 1].length); | |
3065 | ||
3066 | /* Note that in descriptors for periodic traffic are not consumed. This means that | |
3067 | the USB controller never propagates in the SB list. In other words, if there already | |
3068 | is an SB descriptor in the list for this EP we don't have to do anything. */ | |
3069 | if (TxIsocEPList[epid].sub == 0) { | |
3070 | dbg_isoc("Isoc traffic not already running, allocating SB"); | |
3071 | ||
3072 | next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_ATOMIC); | |
3073 | assert(next_sb_desc != NULL); | |
3074 | ||
3075 | next_sb_desc->command = (IO_STATE(USB_SB_command, tt, in) | | |
3076 | IO_STATE(USB_SB_command, eot, yes) | | |
3077 | IO_STATE(USB_SB_command, eol, yes)); | |
3078 | ||
3079 | next_sb_desc->next = 0; | |
3080 | next_sb_desc->sw_len = 1; /* Actual number of packets is not relevant | |
3081 | for periodic in traffic as long as it is more | |
3082 | than zero. Set to 1 always. */ | |
3083 | next_sb_desc->buf = 0; | |
3084 | ||
3085 | /* The rem field is don't care for isoc traffic, so we don't set it. */ | |
3086 | ||
3087 | /* Only one SB descriptor that belongs to this urb. */ | |
3088 | urb_priv->first_sb = next_sb_desc; | |
3089 | urb_priv->last_sb = next_sb_desc; | |
3090 | ||
3091 | } else { | |
3092 | ||
3093 | dbg_isoc("Isoc traffic already running, just setting first/last_sb"); | |
3094 | ||
3095 | /* Each EP for isoc in will have only one SB descriptor, setup when submitting the | |
3096 | already active urb. Note that even though we may have several first_sb/last_sb | |
3097 | pointing at the same SB descriptor, they are freed only once (when the list has | |
3098 | become empty). */ | |
3099 | urb_priv->first_sb = phys_to_virt(TxIsocEPList[epid].sub); | |
3100 | urb_priv->last_sb = phys_to_virt(TxIsocEPList[epid].sub); | |
3101 | return; | |
3102 | } | |
3103 | ||
3104 | } | |
3105 | ||
3106 | /* Find the spot to insert this urb and add it. */ | |
3107 | if (TxIsocEPList[epid].sub == 0) { | |
3108 | /* First SB descriptor inserted in this list (in or out). */ | |
3109 | dbg_isoc("Inserting SB desc first in list"); | |
3110 | TxIsocEPList[epid].hw_len = 0; | |
3111 | TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb); | |
3112 | ||
3113 | } else { | |
3114 | /* Isochronous traffic is already running, insert new traffic last (only out). */ | |
3115 | dbg_isoc("Inserting SB desc last in list"); | |
3116 | temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub); | |
3117 | while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) != | |
3118 | IO_STATE(USB_SB_command, eol, yes)) { | |
3119 | assert(temp_sb_desc->next); | |
3120 | temp_sb_desc = phys_to_virt(temp_sb_desc->next); | |
3121 | } | |
3122 | dbg_isoc("Appending list on desc 0x%p", temp_sb_desc); | |
3123 | ||
3124 | /* Next pointer must be set before eol is removed. */ | |
3125 | temp_sb_desc->next = virt_to_phys(urb_priv->first_sb); | |
3126 | /* Clear the previous end of list flag since there is a new in the | |
3127 | added SB descriptor list. */ | |
3128 | temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol); | |
3129 | ||
3130 | if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) { | |
3131 | /* 8.8.5 in Designer's Reference says we should check for and correct | |
3132 | any errors in the EP here. That should not be necessary if epid_attn | |
3133 | is handled correctly, so we assume all is ok. */ | |
3134 | dbg_isoc("EP disabled"); | |
3135 | etrax_usb_check_error_isoc_ep(epid); | |
3136 | ||
3137 | /* The SB list was exhausted. */ | |
3138 | if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) { | |
3139 | /* The new sublist did not get processed before the EP was | |
3140 | disabled. Setup the EP again. */ | |
3141 | dbg_isoc("Set EP sub to new list"); | |
3142 | TxIsocEPList[epid].hw_len = 0; | |
3143 | TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb); | |
3144 | } | |
3145 | } | |
3146 | } | |
3147 | ||
3148 | if (urb->transfer_flags & URB_ISO_ASAP) { | |
3149 | /* The isoc transfer should be started as soon as possible. The start_frame | |
3150 | field is a return value if URB_ISO_ASAP was set. Comparing R_USB_FM_NUMBER | |
3151 | with a USB Chief trace shows that the first isoc IN token is sent 2 frames | |
3152 | later. I'm not sure how this affects usage of the start_frame field by the | |
3153 | device driver, or how it affects things when USB_ISO_ASAP is not set, so | |
3154 | therefore there's no compensation for the 2 frame "lag" here. */ | |
3155 | urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff); | |
3156 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
3157 | urb_priv->urb_state = STARTED; | |
3158 | dbg_isoc("URB_ISO_ASAP set, urb->start_frame set to %d", urb->start_frame); | |
3159 | } else { | |
3160 | /* Not started yet. */ | |
3161 | urb_priv->urb_state = NOT_STARTED; | |
3162 | dbg_isoc("urb_priv->urb_state set to NOT_STARTED"); | |
3163 | } | |
3164 | ||
3165 | /* We start the DMA sub channel without checking if it's running or not, because: | |
3166 | 1) If it's already running, issuing the start command is a nop. | |
3167 | 2) We avoid a test-and-set race condition. */ | |
3168 | *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start); | |
3169 | ||
3170 | DBFEXIT; | |
3171 | } | |
3172 | ||
3173 | static void etrax_usb_complete_isoc_urb(struct urb *urb, int status) | |
3174 | { | |
3175 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
3176 | int epid = urb_priv->epid; | |
3177 | int auto_resubmit = 0; | |
3178 | ||
3179 | DBFENTER; | |
3180 | dbg_isoc("complete urb 0x%p, status %d", urb, status); | |
3181 | ||
3182 | if (status) | |
3183 | warn("Completing isoc urb with status %d.", status); | |
3184 | ||
3185 | if (usb_pipein(urb->pipe)) { | |
3186 | int i; | |
3187 | ||
3188 | /* Make that all isoc packets have status and length set before | |
3189 | completing the urb. */ | |
3190 | for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++) { | |
3191 | urb->iso_frame_desc[i].actual_length = 0; | |
3192 | urb->iso_frame_desc[i].status = -EPROTO; | |
3193 | } | |
3194 | ||
3195 | urb_list_del(urb, epid); | |
3196 | ||
3197 | if (!list_empty(&urb_list[epid])) { | |
3198 | ((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED; | |
3199 | } else { | |
3200 | unsigned long int flags; | |
3201 | if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
3202 | /* The EP was enabled, disable it and wait. */ | |
3203 | TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
3204 | ||
3205 | /* Ah, the luxury of busy-wait. */ | |
3206 | while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])); | |
3207 | } | |
3208 | ||
3209 | etrax_remove_from_sb_list(urb); | |
3210 | TxIsocEPList[epid].sub = 0; | |
3211 | TxIsocEPList[epid].hw_len = 0; | |
3212 | ||
3213 | save_flags(flags); | |
3214 | cli(); | |
3215 | etrax_usb_free_epid(epid); | |
3216 | restore_flags(flags); | |
3217 | } | |
3218 | ||
3219 | urb->hcpriv = 0; | |
3220 | kfree(urb_priv); | |
3221 | ||
3222 | /* Release allocated bandwidth. */ | |
3223 | usb_release_bandwidth(urb->dev, urb, 0); | |
3224 | } else if (usb_pipeout(urb->pipe)) { | |
3225 | int freed_descr; | |
3226 | ||
3227 | dbg_isoc("Isoc out urb complete 0x%p", urb); | |
3228 | ||
3229 | /* Update the urb list. */ | |
3230 | urb_list_del(urb, epid); | |
3231 | ||
3232 | freed_descr = etrax_remove_from_sb_list(urb); | |
3233 | dbg_isoc("freed %d descriptors of %d packets", freed_descr, urb->number_of_packets); | |
3234 | assert(freed_descr == urb->number_of_packets); | |
3235 | urb->hcpriv = 0; | |
3236 | kfree(urb_priv); | |
3237 | ||
3238 | /* Release allocated bandwidth. */ | |
3239 | usb_release_bandwidth(urb->dev, urb, 0); | |
3240 | } | |
3241 | ||
3242 | urb->status = status; | |
3243 | if (urb->complete) { | |
3244 | urb->complete(urb, NULL); | |
3245 | } | |
3246 | ||
3247 | if (auto_resubmit) { | |
3248 | /* Check that urb was not unlinked by the complete callback. */ | |
3249 | if (__urb_list_entry(urb, epid)) { | |
3250 | /* Move this one down the list. */ | |
3251 | urb_list_move_last(urb, epid); | |
3252 | ||
3253 | /* Mark the now first urb as started (may already be). */ | |
3254 | ((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED; | |
3255 | ||
3256 | /* Must set this to 0 since this urb is still active after | |
3257 | completion. */ | |
3258 | urb_priv->isoc_packet_counter = 0; | |
3259 | } else { | |
3260 | warn("(ISOC) automatic resubmit urb 0x%p removed by complete.", urb); | |
3261 | } | |
3262 | } | |
3263 | ||
3264 | DBFEXIT; | |
3265 | } | |
3266 | ||
3267 | static void etrax_usb_complete_urb(struct urb *urb, int status) | |
3268 | { | |
3269 | switch (usb_pipetype(urb->pipe)) { | |
3270 | case PIPE_BULK: | |
3271 | etrax_usb_complete_bulk_urb(urb, status); | |
3272 | break; | |
3273 | case PIPE_CONTROL: | |
3274 | etrax_usb_complete_ctrl_urb(urb, status); | |
3275 | break; | |
3276 | case PIPE_INTERRUPT: | |
3277 | etrax_usb_complete_intr_urb(urb, status); | |
3278 | break; | |
3279 | case PIPE_ISOCHRONOUS: | |
3280 | etrax_usb_complete_isoc_urb(urb, status); | |
3281 | break; | |
3282 | default: | |
3283 | err("Unknown pipetype"); | |
3284 | } | |
3285 | } | |
3286 | ||
3287 | ||
3288 | ||
3289 | static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc, struct pt_regs *regs) | |
3290 | { | |
3291 | usb_interrupt_registers_t *reg; | |
3292 | unsigned long flags; | |
3293 | __u32 irq_mask; | |
3294 | __u8 status; | |
3295 | __u32 epid_attn; | |
3296 | __u16 port_status_1; | |
3297 | __u16 port_status_2; | |
3298 | __u32 fm_number; | |
3299 | ||
3300 | DBFENTER; | |
3301 | ||
3302 | /* Read critical registers into local variables, do kmalloc afterwards. */ | |
3303 | save_flags(flags); | |
3304 | cli(); | |
3305 | ||
3306 | irq_mask = *R_USB_IRQ_MASK_READ; | |
3307 | /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that R_USB_STATUS | |
3308 | must be read before R_USB_EPID_ATTN since reading the latter clears the | |
3309 | ourun and perror fields of R_USB_STATUS. */ | |
3310 | status = *R_USB_STATUS; | |
3311 | ||
3312 | /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn interrupts. */ | |
3313 | epid_attn = *R_USB_EPID_ATTN; | |
3314 | ||
3315 | /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the | |
3316 | port_status interrupt. */ | |
3317 | port_status_1 = *R_USB_RH_PORT_STATUS_1; | |
3318 | port_status_2 = *R_USB_RH_PORT_STATUS_2; | |
3319 | ||
3320 | /* Reading R_USB_FM_NUMBER clears the sof interrupt. */ | |
3321 | /* Note: the lower 11 bits contain the actual frame number, sent with each sof. */ | |
3322 | fm_number = *R_USB_FM_NUMBER; | |
3323 | ||
3324 | restore_flags(flags); | |
3325 | ||
3326 | reg = (usb_interrupt_registers_t *)kmem_cache_alloc(top_half_reg_cache, SLAB_ATOMIC); | |
3327 | ||
3328 | assert(reg != NULL); | |
3329 | ||
3330 | reg->hc = (etrax_hc_t *)vhc; | |
3331 | ||
3332 | /* Now put register values into kmalloc'd area. */ | |
3333 | reg->r_usb_irq_mask_read = irq_mask; | |
3334 | reg->r_usb_status = status; | |
3335 | reg->r_usb_epid_attn = epid_attn; | |
3336 | reg->r_usb_rh_port_status_1 = port_status_1; | |
3337 | reg->r_usb_rh_port_status_2 = port_status_2; | |
3338 | reg->r_usb_fm_number = fm_number; | |
3339 | ||
3340 | INIT_WORK(®->usb_bh, etrax_usb_hc_interrupt_bottom_half, reg); | |
3341 | schedule_work(®->usb_bh); | |
3342 | ||
3343 | DBFEXIT; | |
3344 | ||
3345 | return IRQ_HANDLED; | |
3346 | } | |
3347 | ||
3348 | static void etrax_usb_hc_interrupt_bottom_half(void *data) | |
3349 | { | |
3350 | usb_interrupt_registers_t *reg = (usb_interrupt_registers_t *)data; | |
3351 | __u32 irq_mask = reg->r_usb_irq_mask_read; | |
3352 | ||
3353 | DBFENTER; | |
3354 | ||
3355 | /* Interrupts are handled in order of priority. */ | |
3356 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) { | |
3357 | etrax_usb_hc_epid_attn_interrupt(reg); | |
3358 | } | |
3359 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) { | |
3360 | etrax_usb_hc_port_status_interrupt(reg); | |
3361 | } | |
3362 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) { | |
3363 | etrax_usb_hc_ctl_status_interrupt(reg); | |
3364 | } | |
3365 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) { | |
3366 | etrax_usb_hc_isoc_eof_interrupt(); | |
3367 | } | |
3368 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) { | |
3369 | /* Update/restart the bulk start timer since obviously the channel is running. */ | |
3370 | mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL); | |
3371 | /* Update/restart the bulk eot timer since we just received an bulk eot interrupt. */ | |
3372 | mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL); | |
3373 | ||
3374 | etrax_usb_hc_bulk_eot_interrupt(0); | |
3375 | } | |
3376 | ||
3377 | kmem_cache_free(top_half_reg_cache, reg); | |
3378 | ||
3379 | DBFEXIT; | |
3380 | } | |
3381 | ||
3382 | ||
3383 | void etrax_usb_hc_isoc_eof_interrupt(void) | |
3384 | { | |
3385 | struct urb *urb; | |
3386 | etrax_urb_priv_t *urb_priv; | |
3387 | int epid; | |
3388 | unsigned long flags; | |
3389 | ||
3390 | DBFENTER; | |
3391 | ||
3392 | /* Do not check the invalid epid (it has a valid sub pointer). */ | |
3393 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
3394 | ||
3395 | /* Do not check the invalid epid (it has a valid sub pointer). */ | |
3396 | if ((epid == DUMMY_EPID) || (epid == INVALID_EPID)) | |
3397 | continue; | |
3398 | ||
3399 | /* Disable interrupts to block the isoc out descriptor interrupt handler | |
3400 | from being called while the isoc EPID list is being checked. | |
3401 | */ | |
3402 | save_flags(flags); | |
3403 | cli(); | |
3404 | ||
3405 | if (TxIsocEPList[epid].sub == 0) { | |
3406 | /* Nothing here to see. */ | |
3407 | restore_flags(flags); | |
3408 | continue; | |
3409 | } | |
3410 | ||
3411 | /* Get the first urb (if any). */ | |
3412 | urb = urb_list_first(epid); | |
3413 | if (urb == 0) { | |
3414 | warn("Ignoring NULL urb"); | |
3415 | restore_flags(flags); | |
3416 | continue; | |
3417 | } | |
3418 | if (usb_pipein(urb->pipe)) { | |
3419 | ||
3420 | /* Sanity check. */ | |
3421 | assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS); | |
3422 | ||
3423 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
3424 | assert(urb_priv); | |
3425 | ||
3426 | if (urb_priv->urb_state == NOT_STARTED) { | |
3427 | ||
3428 | /* If ASAP is not set and urb->start_frame is the current frame, | |
3429 | start the transfer. */ | |
3430 | if (!(urb->transfer_flags & URB_ISO_ASAP) && | |
3431 | (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) { | |
3432 | ||
3433 | dbg_isoc("Enabling isoc IN EP descr for epid %d", epid); | |
3434 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
3435 | ||
3436 | /* This urb is now active. */ | |
3437 | urb_priv->urb_state = STARTED; | |
3438 | continue; | |
3439 | } | |
3440 | } | |
3441 | } | |
3442 | restore_flags(flags); | |
3443 | } | |
3444 | ||
3445 | DBFEXIT; | |
3446 | ||
3447 | } | |
3448 | ||
3449 | void etrax_usb_hc_bulk_eot_interrupt(int timer_induced) | |
3450 | { | |
3451 | int epid; | |
3452 | ||
3453 | /* The technique is to run one urb at a time, wait for the eot interrupt at which | |
3454 | point the EP descriptor has been disabled. */ | |
3455 | ||
3456 | DBFENTER; | |
3457 | dbg_bulk("bulk eot%s", timer_induced ? ", called by timer" : ""); | |
3458 | ||
3459 | for (epid = 0; epid < NBR_OF_EPIDS; epid++) { | |
3460 | ||
3461 | if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) && | |
3462 | (TxBulkEPList[epid].sub != 0)) { | |
3463 | ||
3464 | struct urb *urb; | |
3465 | etrax_urb_priv_t *urb_priv; | |
3466 | unsigned long flags; | |
3467 | __u32 r_usb_ept_data; | |
3468 | ||
3469 | /* Found a disabled EP descriptor which has a non-null sub pointer. | |
3470 | Verify that this ctrl EP descriptor got disabled no errors. | |
3471 | FIXME: Necessary to check error_code? */ | |
3472 | dbg_bulk("for epid %d?", epid); | |
3473 | ||
3474 | /* Get the first urb. */ | |
3475 | urb = urb_list_first(epid); | |
3476 | ||
3477 | /* FIXME: Could this happen for valid reasons? Why did it disappear? Because of | |
3478 | wrong unlinking? */ | |
3479 | if (!urb) { | |
3480 | warn("NULL urb for epid %d", epid); | |
3481 | continue; | |
3482 | } | |
3483 | ||
3484 | assert(urb); | |
3485 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
3486 | assert(urb_priv); | |
3487 | ||
3488 | /* Sanity checks. */ | |
3489 | assert(usb_pipetype(urb->pipe) == PIPE_BULK); | |
3490 | if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) { | |
3491 | err("bulk endpoint got disabled before reaching last sb"); | |
3492 | } | |
3493 | ||
3494 | /* For bulk IN traffic, there seems to be a race condition between | |
3495 | between the bulk eot and eop interrupts, or rather an uncertainty regarding | |
3496 | the order in which they happen. Normally we expect the eop interrupt from | |
3497 | DMA channel 9 to happen before the eot interrupt. | |
3498 | ||
3499 | Therefore, we complete the bulk IN urb in the rx interrupt handler instead. */ | |
3500 | ||
3501 | if (usb_pipein(urb->pipe)) { | |
3502 | dbg_bulk("in urb, continuing"); | |
3503 | continue; | |
3504 | } | |
3505 | ||
3506 | save_flags(flags); | |
3507 | cli(); | |
3508 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
3509 | nop(); | |
3510 | r_usb_ept_data = *R_USB_EPT_DATA; | |
3511 | restore_flags(flags); | |
3512 | ||
3513 | if (IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data) == | |
3514 | IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) { | |
3515 | /* This means that the endpoint has no error, is disabled | |
3516 | and had inserted traffic, i.e. transfer successfully completed. */ | |
3517 | etrax_usb_complete_bulk_urb(urb, 0); | |
3518 | } else { | |
3519 | /* Shouldn't happen. We expect errors to be caught by epid attention. */ | |
3520 | err("Found disabled bulk EP desc, error_code != no_error"); | |
3521 | } | |
3522 | } | |
3523 | } | |
3524 | ||
3525 | /* Normally, we should find (at least) one disabled EP descriptor with a valid sub pointer. | |
3526 | However, because of the uncertainty in the deliverance of the eop/eot interrupts, we may | |
3527 | not. Also, we might find two disabled EPs when handling an eot interrupt, and then find | |
3528 | none the next time. */ | |
3529 | ||
3530 | DBFEXIT; | |
3531 | ||
3532 | } | |
3533 | ||
3534 | void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg) | |
3535 | { | |
3536 | /* This function handles the epid attention interrupt. There are a variety of reasons | |
3537 | for this interrupt to happen (Designer's Reference, p. 8 - 22 for the details): | |
3538 | ||
3539 | invalid ep_id - Invalid epid in an EP (EP disabled). | |
3540 | stall - Not strictly an error condition (EP disabled). | |
3541 | 3rd error - Three successive transaction errors (EP disabled). | |
3542 | buffer ourun - Buffer overrun or underrun (EP disabled). | |
3543 | past eof1 - Intr or isoc transaction proceeds past EOF1. | |
3544 | near eof - Intr or isoc transaction would not fit inside the frame. | |
3545 | zout transfer - If zout transfer for a bulk endpoint (EP disabled). | |
3546 | setup transfer - If setup transfer for a non-ctrl endpoint (EP disabled). */ | |
3547 | ||
3548 | int epid; | |
3549 | ||
3550 | ||
3551 | DBFENTER; | |
3552 | ||
3553 | assert(reg != NULL); | |
3554 | ||
3555 | /* Note that we loop through all epids. We still want to catch errors for | |
3556 | the invalid one, even though we might handle them differently. */ | |
3557 | for (epid = 0; epid < NBR_OF_EPIDS; epid++) { | |
3558 | ||
3559 | if (test_bit(epid, (void *)®->r_usb_epid_attn)) { | |
3560 | ||
3561 | struct urb *urb; | |
3562 | __u32 r_usb_ept_data; | |
3563 | unsigned long flags; | |
3564 | int error_code; | |
3565 | ||
3566 | save_flags(flags); | |
3567 | cli(); | |
3568 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
3569 | nop(); | |
3570 | /* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO | |
3571 | registers, they are located at the same address and are of the same size. | |
3572 | In other words, this read should be ok for isoc also. */ | |
3573 | r_usb_ept_data = *R_USB_EPT_DATA; | |
3574 | restore_flags(flags); | |
3575 | ||
3576 | /* First some sanity checks. */ | |
3577 | if (epid == INVALID_EPID) { | |
3578 | /* FIXME: What if it became disabled? Could seriously hurt interrupt | |
3579 | traffic. (Use do_intr_recover.) */ | |
3580 | warn("Got epid_attn for INVALID_EPID (%d).", epid); | |
3581 | err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data); | |
3582 | err("R_USB_STATUS = 0x%x", reg->r_usb_status); | |
3583 | continue; | |
3584 | } else if (epid == DUMMY_EPID) { | |
3585 | /* We definitely don't care about these ones. Besides, they are | |
3586 | always disabled, so any possible disabling caused by the | |
3587 | epid attention interrupt is irrelevant. */ | |
3588 | warn("Got epid_attn for DUMMY_EPID (%d).", epid); | |
3589 | continue; | |
3590 | } | |
3591 | ||
3592 | /* Get the first urb in the urb list for this epid. We blatantly assume | |
3593 | that only the first urb could have caused the epid attention. | |
3594 | (For bulk and ctrl, only one urb is active at any one time. For intr | |
3595 | and isoc we remove them once they are completed.) */ | |
3596 | urb = urb_list_first(epid); | |
3597 | ||
3598 | if (urb == NULL) { | |
3599 | err("Got epid_attn for epid %i with no urb.", epid); | |
3600 | err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data); | |
3601 | err("R_USB_STATUS = 0x%x", reg->r_usb_status); | |
3602 | continue; | |
3603 | } | |
3604 | ||
3605 | switch (usb_pipetype(urb->pipe)) { | |
3606 | case PIPE_BULK: | |
3607 | warn("Got epid attn for bulk endpoint, epid %d", epid); | |
3608 | break; | |
3609 | case PIPE_CONTROL: | |
3610 | warn("Got epid attn for control endpoint, epid %d", epid); | |
3611 | break; | |
3612 | case PIPE_INTERRUPT: | |
3613 | warn("Got epid attn for interrupt endpoint, epid %d", epid); | |
3614 | break; | |
3615 | case PIPE_ISOCHRONOUS: | |
3616 | warn("Got epid attn for isochronous endpoint, epid %d", epid); | |
3617 | break; | |
3618 | } | |
3619 | ||
3620 | if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) { | |
3621 | if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) { | |
3622 | warn("Hold was set for epid %d.", epid); | |
3623 | continue; | |
3624 | } | |
3625 | } | |
3626 | ||
3627 | /* Even though error_code occupies bits 22 - 23 in both R_USB_EPT_DATA and | |
3628 | R_USB_EPT_DATA_ISOC, we separate them here so we don't forget in other places. */ | |
3629 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
3630 | error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data); | |
3631 | } else { | |
3632 | error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data); | |
3633 | } | |
3634 | ||
3635 | /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */ | |
3636 | if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) { | |
3637 | ||
3638 | /* Isoc traffic doesn't have error_count_in/error_count_out. */ | |
3639 | if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) && | |
3640 | (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, r_usb_ept_data) == 3 || | |
3641 | IO_EXTRACT(R_USB_EPT_DATA, error_count_out, r_usb_ept_data) == 3)) { | |
3642 | /* 3rd error. */ | |
3643 | warn("3rd error for epid %i", epid); | |
3644 | etrax_usb_complete_urb(urb, -EPROTO); | |
3645 | ||
3646 | } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) { | |
3647 | ||
3648 | warn("Perror for epid %d", epid); | |
3649 | ||
3650 | if (!(r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, valid))) { | |
3651 | /* invalid ep_id */ | |
3652 | panic("Perror because of invalid epid." | |
3653 | " Deconfigured too early?"); | |
3654 | } else { | |
3655 | /* past eof1, near eof, zout transfer, setup transfer */ | |
3656 | ||
3657 | /* Dump the urb and the relevant EP descriptor list. */ | |
3658 | ||
3659 | __dump_urb(urb); | |
3660 | __dump_ept_data(epid); | |
3661 | __dump_ep_list(usb_pipetype(urb->pipe)); | |
3662 | ||
3663 | panic("Something wrong with DMA descriptor contents." | |
3664 | " Too much traffic inserted?"); | |
3665 | } | |
3666 | } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) { | |
3667 | /* buffer ourun */ | |
3668 | panic("Buffer overrun/underrun for epid %d. DMA too busy?", epid); | |
3669 | } | |
3670 | ||
3671 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, stall)) { | |
3672 | /* Not really a protocol error, just says that the endpoint gave | |
3673 | a stall response. Note that error_code cannot be stall for isoc. */ | |
3674 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
3675 | panic("Isoc traffic cannot stall"); | |
3676 | } | |
3677 | ||
3678 | warn("Stall for epid %d", epid); | |
3679 | etrax_usb_complete_urb(urb, -EPIPE); | |
3680 | ||
3681 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, bus_error)) { | |
3682 | /* Two devices responded to a transaction request. Must be resolved | |
3683 | by software. FIXME: Reset ports? */ | |
3684 | panic("Bus error for epid %d." | |
3685 | " Two devices responded to transaction request", | |
3686 | epid); | |
3687 | ||
3688 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) { | |
3689 | /* DMA overrun or underrun. */ | |
3690 | warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid); | |
3691 | ||
3692 | /* It seems that error_code = buffer_error in | |
3693 | R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS | |
3694 | are the same error. */ | |
3695 | etrax_usb_complete_urb(urb, -EPROTO); | |
3696 | } | |
3697 | } | |
3698 | } | |
3699 | ||
3700 | DBFEXIT; | |
3701 | ||
3702 | } | |
3703 | ||
3704 | void etrax_usb_bulk_start_timer_func(unsigned long dummy) | |
3705 | { | |
3706 | ||
3707 | /* We might enable an EP descriptor behind the current DMA position when it's about | |
3708 | to decide that there are no more bulk traffic and it should stop the bulk channel. | |
3709 | Therefore we periodically check if the bulk channel is stopped and there is an | |
3710 | enabled bulk EP descriptor, in which case we start the bulk channel. */ | |
3711 | dbg_bulk("bulk_start_timer timed out."); | |
3712 | ||
3713 | if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) { | |
3714 | int epid; | |
3715 | ||
3716 | dbg_bulk("Bulk DMA channel not running."); | |
3717 | ||
3718 | for (epid = 0; epid < NBR_OF_EPIDS; epid++) { | |
3719 | if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
3720 | dbg_bulk("Found enabled EP for epid %d, starting bulk channel.\n", | |
3721 | epid); | |
3722 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); | |
3723 | ||
3724 | /* Restart the bulk eot timer since we just started the bulk channel. */ | |
3725 | mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL); | |
3726 | ||
3727 | /* No need to search any further. */ | |
3728 | break; | |
3729 | } | |
3730 | } | |
3731 | } else { | |
3732 | dbg_bulk("Bulk DMA channel running."); | |
3733 | } | |
3734 | } | |
3735 | ||
3736 | void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg) | |
3737 | { | |
3738 | etrax_hc_t *hc = reg->hc; | |
3739 | __u16 r_usb_rh_port_status_1 = reg->r_usb_rh_port_status_1; | |
3740 | __u16 r_usb_rh_port_status_2 = reg->r_usb_rh_port_status_2; | |
3741 | ||
3742 | DBFENTER; | |
3743 | ||
3744 | /* The Etrax RH does not include a wPortChange register, so this has to be handled in software | |
3745 | (by saving the old port status value for comparison when the port status interrupt happens). | |
3746 | See section 11.16.2.6.2 in the USB 1.1 spec for details. */ | |
3747 | ||
3748 | dbg_rh("hc->rh.prev_wPortStatus_1 = 0x%x", hc->rh.prev_wPortStatus_1); | |
3749 | dbg_rh("hc->rh.prev_wPortStatus_2 = 0x%x", hc->rh.prev_wPortStatus_2); | |
3750 | dbg_rh("r_usb_rh_port_status_1 = 0x%x", r_usb_rh_port_status_1); | |
3751 | dbg_rh("r_usb_rh_port_status_2 = 0x%x", r_usb_rh_port_status_2); | |
3752 | ||
3753 | /* C_PORT_CONNECTION is set on any transition. */ | |
3754 | hc->rh.wPortChange_1 |= | |
3755 | ((r_usb_rh_port_status_1 & (1 << RH_PORT_CONNECTION)) != | |
3756 | (hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_CONNECTION))) ? | |
3757 | (1 << RH_PORT_CONNECTION) : 0; | |
3758 | ||
3759 | hc->rh.wPortChange_2 |= | |
3760 | ((r_usb_rh_port_status_2 & (1 << RH_PORT_CONNECTION)) != | |
3761 | (hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_CONNECTION))) ? | |
3762 | (1 << RH_PORT_CONNECTION) : 0; | |
3763 | ||
3764 | /* C_PORT_ENABLE is _only_ set on a one to zero transition, i.e. when | |
3765 | the port is disabled, not when it's enabled. */ | |
3766 | hc->rh.wPortChange_1 |= | |
3767 | ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_ENABLE)) | |
3768 | && !(r_usb_rh_port_status_1 & (1 << RH_PORT_ENABLE))) ? | |
3769 | (1 << RH_PORT_ENABLE) : 0; | |
3770 | ||
3771 | hc->rh.wPortChange_2 |= | |
3772 | ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_ENABLE)) | |
3773 | && !(r_usb_rh_port_status_2 & (1 << RH_PORT_ENABLE))) ? | |
3774 | (1 << RH_PORT_ENABLE) : 0; | |
3775 | ||
3776 | /* C_PORT_SUSPEND is set to one when the device has transitioned out | |
3777 | of the suspended state, i.e. when suspend goes from one to zero. */ | |
3778 | hc->rh.wPortChange_1 |= | |
3779 | ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_SUSPEND)) | |
3780 | && !(r_usb_rh_port_status_1 & (1 << RH_PORT_SUSPEND))) ? | |
3781 | (1 << RH_PORT_SUSPEND) : 0; | |
3782 | ||
3783 | hc->rh.wPortChange_2 |= | |
3784 | ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_SUSPEND)) | |
3785 | && !(r_usb_rh_port_status_2 & (1 << RH_PORT_SUSPEND))) ? | |
3786 | (1 << RH_PORT_SUSPEND) : 0; | |
3787 | ||
3788 | ||
3789 | /* C_PORT_RESET is set when reset processing on this port is complete. */ | |
3790 | hc->rh.wPortChange_1 |= | |
3791 | ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_RESET)) | |
3792 | && !(r_usb_rh_port_status_1 & (1 << RH_PORT_RESET))) ? | |
3793 | (1 << RH_PORT_RESET) : 0; | |
3794 | ||
3795 | hc->rh.wPortChange_2 |= | |
3796 | ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_RESET)) | |
3797 | && !(r_usb_rh_port_status_2 & (1 << RH_PORT_RESET))) ? | |
3798 | (1 << RH_PORT_RESET) : 0; | |
3799 | ||
3800 | /* Save the new values for next port status change. */ | |
3801 | hc->rh.prev_wPortStatus_1 = r_usb_rh_port_status_1; | |
3802 | hc->rh.prev_wPortStatus_2 = r_usb_rh_port_status_2; | |
3803 | ||
3804 | dbg_rh("hc->rh.wPortChange_1 set to 0x%x", hc->rh.wPortChange_1); | |
3805 | dbg_rh("hc->rh.wPortChange_2 set to 0x%x", hc->rh.wPortChange_2); | |
3806 | ||
3807 | DBFEXIT; | |
3808 | ||
3809 | } | |
3810 | ||
3811 | void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg) | |
3812 | { | |
3813 | DBFENTER; | |
3814 | ||
3815 | /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB | |
3816 | list for the corresponding epid? */ | |
3817 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) { | |
3818 | panic("USB controller got ourun."); | |
3819 | } | |
3820 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) { | |
3821 | ||
3822 | /* Before, etrax_usb_do_intr_recover was called on this epid if it was | |
3823 | an interrupt pipe. I don't see how re-enabling all EP descriptors | |
3824 | will help if there was a programming error. */ | |
3825 | panic("USB controller got perror."); | |
3826 | } | |
3827 | ||
3828 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) { | |
3829 | /* We should never operate in device mode. */ | |
3830 | panic("USB controller in device mode."); | |
3831 | } | |
3832 | ||
3833 | /* These if-statements could probably be nested. */ | |
3834 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, host_mode)) { | |
3835 | info("USB controller in host mode."); | |
3836 | } | |
3837 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, started)) { | |
3838 | info("USB controller started."); | |
3839 | } | |
3840 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, running)) { | |
3841 | info("USB controller running."); | |
3842 | } | |
3843 | ||
3844 | DBFEXIT; | |
3845 | ||
3846 | } | |
3847 | ||
3848 | ||
3849 | static int etrax_rh_submit_urb(struct urb *urb) | |
3850 | { | |
3851 | struct usb_device *usb_dev = urb->dev; | |
3852 | etrax_hc_t *hc = usb_dev->bus->hcpriv; | |
3853 | unsigned int pipe = urb->pipe; | |
3854 | struct usb_ctrlrequest *cmd = (struct usb_ctrlrequest *) urb->setup_packet; | |
3855 | void *data = urb->transfer_buffer; | |
3856 | int leni = urb->transfer_buffer_length; | |
3857 | int len = 0; | |
3858 | int stat = 0; | |
3859 | ||
3860 | __u16 bmRType_bReq; | |
3861 | __u16 wValue; | |
3862 | __u16 wIndex; | |
3863 | __u16 wLength; | |
3864 | ||
3865 | DBFENTER; | |
3866 | ||
3867 | /* FIXME: What is this interrupt urb that is sent to the root hub? */ | |
3868 | if (usb_pipetype (pipe) == PIPE_INTERRUPT) { | |
3869 | dbg_rh("Root-Hub submit IRQ: every %d ms", urb->interval); | |
3870 | hc->rh.urb = urb; | |
3871 | hc->rh.send = 1; | |
3872 | /* FIXME: We could probably remove this line since it's done | |
3873 | in etrax_rh_init_int_timer. (Don't remove it from | |
3874 | etrax_rh_init_int_timer though.) */ | |
3875 | hc->rh.interval = urb->interval; | |
3876 | etrax_rh_init_int_timer(urb); | |
3877 | DBFEXIT; | |
3878 | ||
3879 | return 0; | |
3880 | } | |
3881 | ||
3882 | bmRType_bReq = cmd->bRequestType | (cmd->bRequest << 8); | |
3883 | wValue = le16_to_cpu(cmd->wValue); | |
3884 | wIndex = le16_to_cpu(cmd->wIndex); | |
3885 | wLength = le16_to_cpu(cmd->wLength); | |
3886 | ||
3887 | dbg_rh("bmRType_bReq : 0x%04x (%d)", bmRType_bReq, bmRType_bReq); | |
3888 | dbg_rh("wValue : 0x%04x (%d)", wValue, wValue); | |
3889 | dbg_rh("wIndex : 0x%04x (%d)", wIndex, wIndex); | |
3890 | dbg_rh("wLength : 0x%04x (%d)", wLength, wLength); | |
3891 | ||
3892 | switch (bmRType_bReq) { | |
3893 | ||
3894 | /* Request Destination: | |
3895 | without flags: Device, | |
3896 | RH_INTERFACE: interface, | |
3897 | RH_ENDPOINT: endpoint, | |
3898 | RH_CLASS means HUB here, | |
3899 | RH_OTHER | RH_CLASS almost ever means HUB_PORT here | |
3900 | */ | |
3901 | ||
3902 | case RH_GET_STATUS: | |
3903 | *(__u16 *) data = cpu_to_le16 (1); | |
3904 | OK (2); | |
3905 | ||
3906 | case RH_GET_STATUS | RH_INTERFACE: | |
3907 | *(__u16 *) data = cpu_to_le16 (0); | |
3908 | OK (2); | |
3909 | ||
3910 | case RH_GET_STATUS | RH_ENDPOINT: | |
3911 | *(__u16 *) data = cpu_to_le16 (0); | |
3912 | OK (2); | |
3913 | ||
3914 | case RH_GET_STATUS | RH_CLASS: | |
3915 | *(__u32 *) data = cpu_to_le32 (0); | |
3916 | OK (4); /* hub power ** */ | |
3917 | ||
3918 | case RH_GET_STATUS | RH_OTHER | RH_CLASS: | |
3919 | if (wIndex == 1) { | |
3920 | *((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_1); | |
3921 | *((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_1); | |
3922 | } else if (wIndex == 2) { | |
3923 | *((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_2); | |
3924 | *((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_2); | |
3925 | } else { | |
3926 | dbg_rh("RH_GET_STATUS whith invalid wIndex!"); | |
3927 | OK(0); | |
3928 | } | |
3929 | ||
3930 | OK(4); | |
3931 | ||
3932 | case RH_CLEAR_FEATURE | RH_ENDPOINT: | |
3933 | switch (wValue) { | |
3934 | case (RH_ENDPOINT_STALL): | |
3935 | OK (0); | |
3936 | } | |
3937 | break; | |
3938 | ||
3939 | case RH_CLEAR_FEATURE | RH_CLASS: | |
3940 | switch (wValue) { | |
3941 | case (RH_C_HUB_OVER_CURRENT): | |
3942 | OK (0); /* hub power over current ** */ | |
3943 | } | |
3944 | break; | |
3945 | ||
3946 | case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS: | |
3947 | switch (wValue) { | |
3948 | case (RH_PORT_ENABLE): | |
3949 | if (wIndex == 1) { | |
3950 | ||
3951 | dbg_rh("trying to do disable port 1"); | |
3952 | ||
3953 | *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes); | |
3954 | ||
3955 | while (hc->rh.prev_wPortStatus_1 & | |
3956 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)); | |
3957 | *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no); | |
3958 | dbg_rh("Port 1 is disabled"); | |
3959 | ||
3960 | } else if (wIndex == 2) { | |
3961 | ||
3962 | dbg_rh("trying to do disable port 2"); | |
3963 | ||
3964 | *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes); | |
3965 | ||
3966 | while (hc->rh.prev_wPortStatus_2 & | |
3967 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes)); | |
3968 | *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no); | |
3969 | dbg_rh("Port 2 is disabled"); | |
3970 | ||
3971 | } else { | |
3972 | dbg_rh("RH_CLEAR_FEATURE->RH_PORT_ENABLE " | |
3973 | "with invalid wIndex == %d!", wIndex); | |
3974 | } | |
3975 | ||
3976 | OK (0); | |
3977 | case (RH_PORT_SUSPEND): | |
3978 | /* Opposite to suspend should be resume, so we'll do a resume. */ | |
3979 | /* FIXME: USB 1.1, 11.16.2.2 says: | |
3980 | "Clearing the PORT_SUSPEND feature causes a host-initiated resume | |
3981 | on the specified port. If the port is not in the Suspended state, | |
3982 | the hub should treat this request as a functional no-operation." | |
3983 | Shouldn't we check if the port is in a suspended state before | |
3984 | resuming? */ | |
3985 | ||
3986 | /* Make sure the controller isn't busy. */ | |
3987 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
3988 | ||
3989 | if (wIndex == 1) { | |
3990 | *R_USB_COMMAND = | |
3991 | IO_STATE(R_USB_COMMAND, port_sel, port1) | | |
3992 | IO_STATE(R_USB_COMMAND, port_cmd, resume) | | |
3993 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
3994 | } else if (wIndex == 2) { | |
3995 | *R_USB_COMMAND = | |
3996 | IO_STATE(R_USB_COMMAND, port_sel, port2) | | |
3997 | IO_STATE(R_USB_COMMAND, port_cmd, resume) | | |
3998 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
3999 | } else { | |
4000 | dbg_rh("RH_CLEAR_FEATURE->RH_PORT_SUSPEND " | |
4001 | "with invalid wIndex == %d!", wIndex); | |
4002 | } | |
4003 | ||
4004 | OK (0); | |
4005 | case (RH_PORT_POWER): | |
4006 | OK (0); /* port power ** */ | |
4007 | case (RH_C_PORT_CONNECTION): | |
4008 | if (wIndex == 1) { | |
4009 | hc->rh.wPortChange_1 &= ~(1 << RH_PORT_CONNECTION); | |
4010 | } else if (wIndex == 2) { | |
4011 | hc->rh.wPortChange_2 &= ~(1 << RH_PORT_CONNECTION); | |
4012 | } else { | |
4013 | dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_CONNECTION " | |
4014 | "with invalid wIndex == %d!", wIndex); | |
4015 | } | |
4016 | ||
4017 | OK (0); | |
4018 | case (RH_C_PORT_ENABLE): | |
4019 | if (wIndex == 1) { | |
4020 | hc->rh.wPortChange_1 &= ~(1 << RH_PORT_ENABLE); | |
4021 | } else if (wIndex == 2) { | |
4022 | hc->rh.wPortChange_2 &= ~(1 << RH_PORT_ENABLE); | |
4023 | } else { | |
4024 | dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_ENABLE " | |
4025 | "with invalid wIndex == %d!", wIndex); | |
4026 | } | |
4027 | OK (0); | |
4028 | case (RH_C_PORT_SUSPEND): | |
4029 | /*** WR_RH_PORTSTAT(RH_PS_PSSC); */ | |
4030 | OK (0); | |
4031 | case (RH_C_PORT_OVER_CURRENT): | |
4032 | OK (0); /* port power over current ** */ | |
4033 | case (RH_C_PORT_RESET): | |
4034 | if (wIndex == 1) { | |
4035 | hc->rh.wPortChange_1 &= ~(1 << RH_PORT_RESET); | |
4036 | } else if (wIndex == 2) { | |
4037 | hc->rh.wPortChange_2 &= ~(1 << RH_PORT_RESET); | |
4038 | } else { | |
4039 | dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_RESET " | |
4040 | "with invalid index == %d!", wIndex); | |
4041 | } | |
4042 | ||
4043 | OK (0); | |
4044 | ||
4045 | } | |
4046 | break; | |
4047 | ||
4048 | case RH_SET_FEATURE | RH_OTHER | RH_CLASS: | |
4049 | switch (wValue) { | |
4050 | case (RH_PORT_SUSPEND): | |
4051 | ||
4052 | /* Make sure the controller isn't busy. */ | |
4053 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4054 | ||
4055 | if (wIndex == 1) { | |
4056 | *R_USB_COMMAND = | |
4057 | IO_STATE(R_USB_COMMAND, port_sel, port1) | | |
4058 | IO_STATE(R_USB_COMMAND, port_cmd, suspend) | | |
4059 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4060 | } else if (wIndex == 2) { | |
4061 | *R_USB_COMMAND = | |
4062 | IO_STATE(R_USB_COMMAND, port_sel, port2) | | |
4063 | IO_STATE(R_USB_COMMAND, port_cmd, suspend) | | |
4064 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4065 | } else { | |
4066 | dbg_rh("RH_SET_FEATURE->RH_PORT_SUSPEND " | |
4067 | "with invalid wIndex == %d!", wIndex); | |
4068 | } | |
4069 | ||
4070 | OK (0); | |
4071 | case (RH_PORT_RESET): | |
4072 | if (wIndex == 1) { | |
4073 | ||
4074 | port_1_reset: | |
4075 | dbg_rh("Doing reset of port 1"); | |
4076 | ||
4077 | /* Make sure the controller isn't busy. */ | |
4078 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4079 | ||
4080 | *R_USB_COMMAND = | |
4081 | IO_STATE(R_USB_COMMAND, port_sel, port1) | | |
4082 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4083 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4084 | ||
4085 | /* We must wait at least 10 ms for the device to recover. | |
4086 | 15 ms should be enough. */ | |
4087 | udelay(15000); | |
4088 | ||
4089 | /* Wait for reset bit to go low (should be done by now). */ | |
4090 | while (hc->rh.prev_wPortStatus_1 & | |
4091 | IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes)); | |
4092 | ||
4093 | /* If the port status is | |
4094 | 1) connected and enabled then there is a device and everything is fine | |
4095 | 2) neither connected nor enabled then there is no device, also fine | |
4096 | 3) connected and not enabled then we try again | |
4097 | (Yes, there are other port status combinations besides these.) */ | |
4098 | ||
4099 | if ((hc->rh.prev_wPortStatus_1 & | |
4100 | IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) && | |
4101 | (hc->rh.prev_wPortStatus_1 & | |
4102 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) { | |
4103 | dbg_rh("Connected device on port 1, but port not enabled?" | |
4104 | " Trying reset again."); | |
4105 | goto port_2_reset; | |
4106 | } | |
4107 | ||
4108 | /* Diagnostic printouts. */ | |
4109 | if ((hc->rh.prev_wPortStatus_1 & | |
4110 | IO_STATE(R_USB_RH_PORT_STATUS_1, connected, no)) && | |
4111 | (hc->rh.prev_wPortStatus_1 & | |
4112 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) { | |
4113 | dbg_rh("No connected device on port 1"); | |
4114 | } else if ((hc->rh.prev_wPortStatus_1 & | |
4115 | IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) && | |
4116 | (hc->rh.prev_wPortStatus_1 & | |
4117 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes))) { | |
4118 | dbg_rh("Connected device on port 1, port 1 enabled"); | |
4119 | } | |
4120 | ||
4121 | } else if (wIndex == 2) { | |
4122 | ||
4123 | port_2_reset: | |
4124 | dbg_rh("Doing reset of port 2"); | |
4125 | ||
4126 | /* Make sure the controller isn't busy. */ | |
4127 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4128 | ||
4129 | /* Issue the reset command. */ | |
4130 | *R_USB_COMMAND = | |
4131 | IO_STATE(R_USB_COMMAND, port_sel, port2) | | |
4132 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4133 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4134 | ||
4135 | /* We must wait at least 10 ms for the device to recover. | |
4136 | 15 ms should be enough. */ | |
4137 | udelay(15000); | |
4138 | ||
4139 | /* Wait for reset bit to go low (should be done by now). */ | |
4140 | while (hc->rh.prev_wPortStatus_2 & | |
4141 | IO_STATE(R_USB_RH_PORT_STATUS_2, reset, yes)); | |
4142 | ||
4143 | /* If the port status is | |
4144 | 1) connected and enabled then there is a device and everything is fine | |
4145 | 2) neither connected nor enabled then there is no device, also fine | |
4146 | 3) connected and not enabled then we try again | |
4147 | (Yes, there are other port status combinations besides these.) */ | |
4148 | ||
4149 | if ((hc->rh.prev_wPortStatus_2 & | |
4150 | IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) && | |
4151 | (hc->rh.prev_wPortStatus_2 & | |
4152 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) { | |
4153 | dbg_rh("Connected device on port 2, but port not enabled?" | |
4154 | " Trying reset again."); | |
4155 | goto port_2_reset; | |
4156 | } | |
4157 | ||
4158 | /* Diagnostic printouts. */ | |
4159 | if ((hc->rh.prev_wPortStatus_2 & | |
4160 | IO_STATE(R_USB_RH_PORT_STATUS_2, connected, no)) && | |
4161 | (hc->rh.prev_wPortStatus_2 & | |
4162 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) { | |
4163 | dbg_rh("No connected device on port 2"); | |
4164 | } else if ((hc->rh.prev_wPortStatus_2 & | |
4165 | IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) && | |
4166 | (hc->rh.prev_wPortStatus_2 & | |
4167 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes))) { | |
4168 | dbg_rh("Connected device on port 2, port 2 enabled"); | |
4169 | } | |
4170 | ||
4171 | } else { | |
4172 | dbg_rh("RH_SET_FEATURE->RH_PORT_RESET with invalid wIndex = %d", wIndex); | |
4173 | } | |
4174 | ||
4175 | /* Make sure the controller isn't busy. */ | |
4176 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4177 | ||
4178 | /* If all enabled ports were disabled the host controller goes down into | |
4179 | started mode, so we need to bring it back into the running state. | |
4180 | (This is safe even if it's already in the running state.) */ | |
4181 | *R_USB_COMMAND = | |
4182 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4183 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4184 | IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run); | |
4185 | ||
4186 | dbg_rh("...Done"); | |
4187 | OK(0); | |
4188 | ||
4189 | case (RH_PORT_POWER): | |
4190 | OK (0); /* port power ** */ | |
4191 | case (RH_PORT_ENABLE): | |
4192 | /* There is no port enable command in the host controller, so if the | |
4193 | port is already enabled, we do nothing. If not, we reset the port | |
4194 | (with an ugly goto). */ | |
4195 | ||
4196 | if (wIndex == 1) { | |
4197 | if (hc->rh.prev_wPortStatus_1 & | |
4198 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no)) { | |
4199 | goto port_1_reset; | |
4200 | } | |
4201 | } else if (wIndex == 2) { | |
4202 | if (hc->rh.prev_wPortStatus_2 & | |
4203 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no)) { | |
4204 | goto port_2_reset; | |
4205 | } | |
4206 | } else { | |
4207 | dbg_rh("RH_SET_FEATURE->RH_GET_STATUS with invalid wIndex = %d", wIndex); | |
4208 | } | |
4209 | OK (0); | |
4210 | } | |
4211 | break; | |
4212 | ||
4213 | case RH_SET_ADDRESS: | |
4214 | hc->rh.devnum = wValue; | |
4215 | dbg_rh("RH address set to: %d", hc->rh.devnum); | |
4216 | OK (0); | |
4217 | ||
4218 | case RH_GET_DESCRIPTOR: | |
4219 | switch ((wValue & 0xff00) >> 8) { | |
4220 | case (0x01): /* device descriptor */ | |
4221 | len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_dev_des), wLength)); | |
4222 | memcpy (data, root_hub_dev_des, len); | |
4223 | OK (len); | |
4224 | case (0x02): /* configuration descriptor */ | |
4225 | len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_config_des), wLength)); | |
4226 | memcpy (data, root_hub_config_des, len); | |
4227 | OK (len); | |
4228 | case (0x03): /* string descriptors */ | |
4229 | len = usb_root_hub_string (wValue & 0xff, | |
4230 | 0xff, "ETRAX 100LX", | |
4231 | data, wLength); | |
4232 | if (len > 0) { | |
4233 | OK(min(leni, len)); | |
4234 | } else { | |
4235 | stat = -EPIPE; | |
4236 | } | |
4237 | ||
4238 | } | |
4239 | break; | |
4240 | ||
4241 | case RH_GET_DESCRIPTOR | RH_CLASS: | |
4242 | root_hub_hub_des[2] = hc->rh.numports; | |
4243 | len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_hub_des), wLength)); | |
4244 | memcpy (data, root_hub_hub_des, len); | |
4245 | OK (len); | |
4246 | ||
4247 | case RH_GET_CONFIGURATION: | |
4248 | *(__u8 *) data = 0x01; | |
4249 | OK (1); | |
4250 | ||
4251 | case RH_SET_CONFIGURATION: | |
4252 | OK (0); | |
4253 | ||
4254 | default: | |
4255 | stat = -EPIPE; | |
4256 | } | |
4257 | ||
4258 | urb->actual_length = len; | |
4259 | urb->status = stat; | |
4260 | urb->dev = NULL; | |
4261 | if (urb->complete) { | |
4262 | urb->complete(urb, NULL); | |
4263 | } | |
4264 | DBFEXIT; | |
4265 | ||
4266 | return 0; | |
4267 | } | |
4268 | ||
4269 | static void | |
4270 | etrax_usb_bulk_eot_timer_func(unsigned long dummy) | |
4271 | { | |
4272 | /* Because of a race condition in the top half, we might miss a bulk eot. | |
4273 | This timer "simulates" a bulk eot if we don't get one for a while, hopefully | |
4274 | correcting the situation. */ | |
4275 | dbg_bulk("bulk_eot_timer timed out."); | |
4276 | etrax_usb_hc_bulk_eot_interrupt(1); | |
4277 | } | |
4278 | ||
4279 | static void* | |
4280 | etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size, int mem_flags, dma_addr_t *dma) | |
4281 | { | |
4282 | return kmalloc(size, mem_flags); | |
4283 | } | |
4284 | ||
4285 | static void | |
4286 | etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma) | |
4287 | { | |
4288 | kfree(addr); | |
4289 | } | |
4290 | ||
4291 | ||
4292 | static struct device fake_device; | |
4293 | ||
4294 | static int __init etrax_usb_hc_init(void) | |
4295 | { | |
4296 | static etrax_hc_t *hc; | |
4297 | struct usb_bus *bus; | |
4298 | struct usb_device *usb_rh; | |
4299 | int i; | |
4300 | ||
4301 | DBFENTER; | |
4302 | ||
4303 | info("ETRAX 100LX USB-HCD %s (c) 2001-2003 Axis Communications AB\n", usb_hcd_version); | |
4304 | ||
4305 | hc = kmalloc(sizeof(etrax_hc_t), GFP_KERNEL); | |
4306 | assert(hc != NULL); | |
4307 | ||
4308 | /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */ | |
4309 | /* Note that we specify sizeof(USB_EP_Desc_t) as the size, but also allocate | |
4310 | SB descriptors from this cache. This is ok since sizeof(USB_EP_Desc_t) == | |
4311 | sizeof(USB_SB_Desc_t). */ | |
4312 | ||
4313 | usb_desc_cache = kmem_cache_create("usb_desc_cache", sizeof(USB_EP_Desc_t), 0, | |
4314 | SLAB_HWCACHE_ALIGN, 0, 0); | |
4315 | assert(usb_desc_cache != NULL); | |
4316 | ||
4317 | top_half_reg_cache = kmem_cache_create("top_half_reg_cache", | |
4318 | sizeof(usb_interrupt_registers_t), | |
4319 | 0, SLAB_HWCACHE_ALIGN, 0, 0); | |
4320 | assert(top_half_reg_cache != NULL); | |
4321 | ||
4322 | isoc_compl_cache = kmem_cache_create("isoc_compl_cache", | |
4323 | sizeof(usb_isoc_complete_data_t), | |
4324 | 0, SLAB_HWCACHE_ALIGN, 0, 0); | |
4325 | assert(isoc_compl_cache != NULL); | |
4326 | ||
4327 | etrax_usb_bus = bus = usb_alloc_bus(&etrax_usb_device_operations); | |
4328 | hc->bus = bus; | |
4329 | bus->bus_name="ETRAX 100LX"; | |
4330 | bus->hcpriv = hc; | |
4331 | ||
093cf723 | 4332 | /* Initialize RH to the default address. |
1da177e4 LT |
4333 | And make sure that we have no status change indication */ |
4334 | hc->rh.numports = 2; /* The RH has two ports */ | |
4335 | hc->rh.devnum = 1; | |
4336 | hc->rh.wPortChange_1 = 0; | |
4337 | hc->rh.wPortChange_2 = 0; | |
4338 | ||
4339 | /* Also initate the previous values to zero */ | |
4340 | hc->rh.prev_wPortStatus_1 = 0; | |
4341 | hc->rh.prev_wPortStatus_2 = 0; | |
4342 | ||
4343 | /* Initialize the intr-traffic flags */ | |
4344 | /* FIXME: This isn't used. (Besides, the error field isn't initialized.) */ | |
4345 | hc->intr.sleeping = 0; | |
4346 | hc->intr.wq = NULL; | |
4347 | ||
4348 | epid_usage_bitmask = 0; | |
4349 | epid_out_traffic = 0; | |
4350 | ||
4351 | /* Mark the invalid epid as being used. */ | |
4352 | set_bit(INVALID_EPID, (void *)&epid_usage_bitmask); | |
4353 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, INVALID_EPID); | |
4354 | nop(); | |
4355 | /* The valid bit should still be set ('invalid' is in our world; not the hardware's). */ | |
4356 | *R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, yes) | | |
4357 | IO_FIELD(R_USB_EPT_DATA, max_len, 1)); | |
4358 | ||
4359 | /* Mark the dummy epid as being used. */ | |
4360 | set_bit(DUMMY_EPID, (void *)&epid_usage_bitmask); | |
4361 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, DUMMY_EPID); | |
4362 | nop(); | |
4363 | *R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, no) | | |
4364 | IO_FIELD(R_USB_EPT_DATA, max_len, 1)); | |
4365 | ||
4366 | /* Initialize the urb list by initiating a head for each list. */ | |
4367 | for (i = 0; i < NBR_OF_EPIDS; i++) { | |
4368 | INIT_LIST_HEAD(&urb_list[i]); | |
4369 | } | |
4370 | spin_lock_init(&urb_list_lock); | |
4371 | ||
4372 | INIT_LIST_HEAD(&urb_unlink_list); | |
4373 | ||
4374 | ||
4375 | /* Initiate the bulk start timer. */ | |
4376 | init_timer(&bulk_start_timer); | |
4377 | bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL; | |
4378 | bulk_start_timer.function = etrax_usb_bulk_start_timer_func; | |
4379 | add_timer(&bulk_start_timer); | |
4380 | ||
4381 | ||
4382 | /* Initiate the bulk eot timer. */ | |
4383 | init_timer(&bulk_eot_timer); | |
4384 | bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL; | |
4385 | bulk_eot_timer.function = etrax_usb_bulk_eot_timer_func; | |
4386 | add_timer(&bulk_eot_timer); | |
4387 | ||
4388 | /* Set up the data structures for USB traffic. Note that this must be done before | |
4389 | any interrupt that relies on sane DMA list occurrs. */ | |
4390 | init_rx_buffers(); | |
4391 | init_tx_bulk_ep(); | |
4392 | init_tx_ctrl_ep(); | |
4393 | init_tx_intr_ep(); | |
4394 | init_tx_isoc_ep(); | |
4395 | ||
4396 | device_initialize(&fake_device); | |
4397 | kobject_set_name(&fake_device.kobj, "etrax_usb"); | |
4398 | kobject_add(&fake_device.kobj); | |
089d42b0 | 4399 | kobject_hotplug(&fake_device.kobj, KOBJ_ADD); |
1da177e4 LT |
4400 | hc->bus->controller = &fake_device; |
4401 | usb_register_bus(hc->bus); | |
4402 | ||
4403 | *R_IRQ_MASK2_SET = | |
4404 | /* Note that these interrupts are not used. */ | |
4405 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) | | |
4406 | /* Sub channel 1 (ctrl) descr. interrupts are used. */ | |
4407 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) | | |
4408 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) | | |
4409 | /* Sub channel 3 (isoc) descr. interrupts are used. */ | |
4410 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set); | |
4411 | ||
4412 | /* Note that the dma9_descr interrupt is not used. */ | |
4413 | *R_IRQ_MASK2_SET = | |
4414 | IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) | | |
4415 | IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set); | |
4416 | ||
4417 | /* FIXME: Enable iso_eof only when isoc traffic is running. */ | |
4418 | *R_USB_IRQ_MASK_SET = | |
4419 | IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) | | |
4420 | IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) | | |
4421 | IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) | | |
4422 | IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) | | |
4423 | IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set); | |
4424 | ||
4425 | ||
4426 | if (request_irq(ETRAX_USB_HC_IRQ, etrax_usb_hc_interrupt_top_half, 0, | |
4427 | "ETRAX 100LX built-in USB (HC)", hc)) { | |
4428 | err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ); | |
4429 | etrax_usb_hc_cleanup(); | |
4430 | DBFEXIT; | |
4431 | return -1; | |
4432 | } | |
4433 | ||
4434 | if (request_irq(ETRAX_USB_RX_IRQ, etrax_usb_rx_interrupt, 0, | |
4435 | "ETRAX 100LX built-in USB (Rx)", hc)) { | |
4436 | err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ); | |
4437 | etrax_usb_hc_cleanup(); | |
4438 | DBFEXIT; | |
4439 | return -1; | |
4440 | } | |
4441 | ||
4442 | if (request_irq(ETRAX_USB_TX_IRQ, etrax_usb_tx_interrupt, 0, | |
4443 | "ETRAX 100LX built-in USB (Tx)", hc)) { | |
4444 | err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ); | |
4445 | etrax_usb_hc_cleanup(); | |
4446 | DBFEXIT; | |
4447 | return -1; | |
4448 | } | |
4449 | ||
4450 | /* R_USB_COMMAND: | |
4451 | USB commands in host mode. The fields in this register should all be | |
4452 | written to in one write. Do not read-modify-write one field at a time. A | |
4453 | write to this register will trigger events in the USB controller and an | |
4454 | incomplete command may lead to unpredictable results, and in worst case | |
4455 | even to a deadlock in the controller. | |
4456 | (Note however that the busy field is read-only, so no need to write to it.) */ | |
4457 | ||
4458 | /* Check the busy bit before writing to R_USB_COMMAND. */ | |
4459 | ||
4460 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4461 | ||
4462 | /* Reset the USB interface. */ | |
4463 | *R_USB_COMMAND = | |
4464 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4465 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4466 | IO_STATE(R_USB_COMMAND, ctrl_cmd, reset); | |
4467 | ||
4468 | /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to 0x2A30 (10800), | |
4469 | to guarantee that control traffic gets 10% of the bandwidth, and periodic transfer may | |
4470 | allocate the rest (90%). This doesn't work though. Read on for a lenghty explanation. | |
4471 | ||
4472 | While there is a difference between rev. 2 and rev. 3 of the ETRAX 100LX regarding the NAK | |
4473 | behaviour, it doesn't solve this problem. What happens is that a control transfer will not | |
4474 | be interrupted in its data stage when PSTART happens (the point at which periodic traffic | |
4475 | is started). Thus, if PSTART is set to 10800 and its IN or OUT token is NAKed until just before | |
4476 | PSTART happens, it will continue the IN/OUT transfer as long as it's ACKed. After it's done, | |
4477 | there may be too little time left for an isochronous transfer, causing an epid attention | |
4478 | interrupt due to perror. The work-around for this is to let the control transfers run at the | |
4479 | end of the frame instead of at the beginning, and will be interrupted just fine if it doesn't | |
4480 | fit into the frame. However, since there will *always* be a control transfer at the beginning | |
4481 | of the frame, regardless of what we set PSTART to, that transfer might be a 64-byte transfer | |
4482 | which consumes up to 15% of the frame, leaving only 85% for periodic traffic. The solution to | |
4483 | this would be to 'dummy allocate' 5% of the frame with the usb_claim_bandwidth function to make | |
4484 | sure that the periodic transfers that are inserted will always fit in the frame. | |
4485 | ||
4486 | The idea was suggested that a control transfer could be split up into several 8 byte transfers, | |
4487 | so that it would be interrupted by PSTART, but since this can't be done for an IN transfer this | |
4488 | hasn't been implemented. | |
4489 | ||
4490 | The value 11960 is chosen to be just after the SOF token, with a couple of bit times extra | |
4491 | for possible bit stuffing. */ | |
4492 | ||
4493 | *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960); | |
4494 | ||
4495 | #ifdef CONFIG_ETRAX_USB_HOST_PORT1 | |
4496 | *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no); | |
4497 | #endif | |
4498 | ||
4499 | #ifdef CONFIG_ETRAX_USB_HOST_PORT2 | |
4500 | *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no); | |
4501 | #endif | |
4502 | ||
4503 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4504 | ||
4505 | /* Configure the USB interface as a host controller. */ | |
4506 | *R_USB_COMMAND = | |
4507 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4508 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4509 | IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config); | |
4510 | ||
4511 | /* Note: Do not reset any ports here. Await the port status interrupts, to have a controlled | |
4512 | sequence of resetting the ports. If we reset both ports now, and there are devices | |
4513 | on both ports, we will get a bus error because both devices will answer the set address | |
4514 | request. */ | |
4515 | ||
4516 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4517 | ||
4518 | /* Start processing of USB traffic. */ | |
4519 | *R_USB_COMMAND = | |
4520 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4521 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4522 | IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run); | |
4523 | ||
4524 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4525 | ||
4526 | usb_rh = usb_alloc_dev(NULL, hc->bus, 0); | |
4527 | hc->bus->root_hub = usb_rh; | |
4528 | usb_rh->state = USB_STATE_ADDRESS; | |
4529 | usb_rh->speed = USB_SPEED_FULL; | |
4530 | usb_rh->devnum = 1; | |
4531 | hc->bus->devnum_next = 2; | |
4532 | usb_rh->ep0.desc.wMaxPacketSize = __const_cpu_to_le16(64); | |
4533 | usb_get_device_descriptor(usb_rh, USB_DT_DEVICE_SIZE); | |
4534 | usb_new_device(usb_rh); | |
4535 | ||
4536 | DBFEXIT; | |
4537 | ||
4538 | return 0; | |
4539 | } | |
4540 | ||
4541 | static void etrax_usb_hc_cleanup(void) | |
4542 | { | |
4543 | DBFENTER; | |
4544 | ||
4545 | free_irq(ETRAX_USB_HC_IRQ, NULL); | |
4546 | free_irq(ETRAX_USB_RX_IRQ, NULL); | |
4547 | free_irq(ETRAX_USB_TX_IRQ, NULL); | |
4548 | ||
4549 | usb_deregister_bus(etrax_usb_bus); | |
4550 | ||
4551 | /* FIXME: call kmem_cache_destroy here? */ | |
4552 | ||
4553 | DBFEXIT; | |
4554 | } | |
4555 | ||
4556 | module_init(etrax_usb_hc_init); | |
4557 | module_exit(etrax_usb_hc_cleanup); |