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Merge branch 'linus' into x86/irqstats
[deliverable/linux.git] / drivers / usb / host / isp1760-hcd.c
1 /*
2 * Driver for the NXP ISP1760 chip
3 *
4 * However, the code might contain some bugs. What doesn't work for sure is:
5 * - ISO
6 * - OTG
7 e The interrupt line is configured as active low, level.
8 *
9 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
10 *
11 */
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/list.h>
16 #include <linux/usb.h>
17 #include <linux/debugfs.h>
18 #include <linux/uaccess.h>
19 #include <linux/io.h>
20 #include <asm/unaligned.h>
21
22 #include "../core/hcd.h"
23 #include "isp1760-hcd.h"
24
25 static struct kmem_cache *qtd_cachep;
26 static struct kmem_cache *qh_cachep;
27
28 struct isp1760_hcd {
29 u32 hcs_params;
30 spinlock_t lock;
31 struct inter_packet_info atl_ints[32];
32 struct inter_packet_info int_ints[32];
33 struct memory_chunk memory_pool[BLOCKS];
34
35 /* periodic schedule support */
36 #define DEFAULT_I_TDPS 1024
37 unsigned periodic_size;
38 unsigned i_thresh;
39 unsigned long reset_done;
40 unsigned long next_statechange;
41 };
42
43 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
44 {
45 return (struct isp1760_hcd *) (hcd->hcd_priv);
46 }
47 static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
48 {
49 return container_of((void *) priv, struct usb_hcd, hcd_priv);
50 }
51
52 /* Section 2.2 Host Controller Capability Registers */
53 #define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
54 #define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
55 #define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
56 #define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
57 #define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
58 #define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
59 #define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
60
61 /* Section 2.3 Host Controller Operational Registers */
62 #define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
63 #define CMD_RESET (1<<1) /* reset HC not bus */
64 #define CMD_RUN (1<<0) /* start/stop HC */
65 #define STS_PCD (1<<2) /* port change detect */
66 #define FLAG_CF (1<<0) /* true: we'll support "high speed" */
67
68 #define PORT_OWNER (1<<13) /* true: companion hc owns this port */
69 #define PORT_POWER (1<<12) /* true: has power (see PPC) */
70 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */
71 #define PORT_RESET (1<<8) /* reset port */
72 #define PORT_SUSPEND (1<<7) /* suspend port */
73 #define PORT_RESUME (1<<6) /* resume it */
74 #define PORT_PE (1<<2) /* port enable */
75 #define PORT_CSC (1<<1) /* connect status change */
76 #define PORT_CONNECT (1<<0) /* device connected */
77 #define PORT_RWC_BITS (PORT_CSC)
78
79 struct isp1760_qtd {
80 struct isp1760_qtd *hw_next;
81 u8 packet_type;
82 u8 toggle;
83
84 void *data_buffer;
85 /* the rest is HCD-private */
86 struct list_head qtd_list;
87 struct urb *urb;
88 size_t length;
89
90 /* isp special*/
91 u32 status;
92 #define URB_COMPLETE_NOTIFY (1 << 0)
93 #define URB_ENQUEUED (1 << 1)
94 #define URB_TYPE_ATL (1 << 2)
95 #define URB_TYPE_INT (1 << 3)
96 };
97
98 struct isp1760_qh {
99 /* first part defined by EHCI spec */
100 struct list_head qtd_list;
101 struct isp1760_hcd *priv;
102
103 /* periodic schedule info */
104 unsigned short period; /* polling interval */
105 struct usb_device *dev;
106
107 u32 toggle;
108 u32 ping;
109 };
110
111 #define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
112
113 static unsigned int isp1760_readl(__u32 __iomem *regs)
114 {
115 return readl(regs);
116 }
117
118 static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
119 {
120 writel(val, regs);
121 }
122
123 /*
124 * The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
125 * doesn't quite work because some people have to enforce 32-bit access
126 */
127 static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
128 __u32 __iomem *dst, u32 offset, u32 len)
129 {
130 struct usb_hcd *hcd = priv_to_hcd(priv);
131 u32 val;
132 u8 *buff8;
133
134 if (!src) {
135 printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
136 return;
137 }
138 isp1760_writel(offset, hcd->regs + HC_MEMORY_REG);
139 /* XXX
140 * 90nsec delay, the spec says something how this could be avoided.
141 */
142 mdelay(1);
143
144 while (len >= 4) {
145 *src = __raw_readl(dst);
146 len -= 4;
147 src++;
148 dst++;
149 }
150
151 if (!len)
152 return;
153
154 /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
155 * allocated.
156 */
157 val = isp1760_readl(dst);
158
159 buff8 = (u8 *)src;
160 while (len) {
161
162 *buff8 = val;
163 val >>= 8;
164 len--;
165 buff8++;
166 }
167 }
168
169 static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
170 __u32 __iomem *dst, u32 len)
171 {
172 while (len >= 4) {
173 __raw_writel(*src, dst);
174 len -= 4;
175 src++;
176 dst++;
177 }
178
179 if (!len)
180 return;
181 /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
182 * extra bytes should not be read by the HW
183 */
184
185 __raw_writel(*src, dst);
186 }
187
188 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
189 static void init_memory(struct isp1760_hcd *priv)
190 {
191 int i;
192 u32 payload;
193
194 payload = 0x1000;
195 for (i = 0; i < BLOCK_1_NUM; i++) {
196 priv->memory_pool[i].start = payload;
197 priv->memory_pool[i].size = BLOCK_1_SIZE;
198 priv->memory_pool[i].free = 1;
199 payload += priv->memory_pool[i].size;
200 }
201
202
203 for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
204 priv->memory_pool[i].start = payload;
205 priv->memory_pool[i].size = BLOCK_2_SIZE;
206 priv->memory_pool[i].free = 1;
207 payload += priv->memory_pool[i].size;
208 }
209
210
211 for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
212 priv->memory_pool[i].start = payload;
213 priv->memory_pool[i].size = BLOCK_3_SIZE;
214 priv->memory_pool[i].free = 1;
215 payload += priv->memory_pool[i].size;
216 }
217
218 BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
219 }
220
221 static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
222 {
223 int i;
224
225 if (!size)
226 return ISP1760_NULL_POINTER;
227
228 for (i = 0; i < BLOCKS; i++) {
229 if (priv->memory_pool[i].size >= size &&
230 priv->memory_pool[i].free) {
231
232 priv->memory_pool[i].free = 0;
233 return priv->memory_pool[i].start;
234 }
235 }
236
237 printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
238 size);
239 printk(KERN_ERR "Current memory map:\n");
240 for (i = 0; i < BLOCKS; i++) {
241 printk(KERN_ERR "Pool %2d size %4d status: %d\n",
242 i, priv->memory_pool[i].size,
243 priv->memory_pool[i].free);
244 }
245 /* XXX maybe -ENOMEM could be possible */
246 BUG();
247 return 0;
248 }
249
250 static void free_mem(struct isp1760_hcd *priv, u32 mem)
251 {
252 int i;
253
254 if (mem == ISP1760_NULL_POINTER)
255 return;
256
257 for (i = 0; i < BLOCKS; i++) {
258 if (priv->memory_pool[i].start == mem) {
259
260 BUG_ON(priv->memory_pool[i].free);
261
262 priv->memory_pool[i].free = 1;
263 return ;
264 }
265 }
266
267 printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
268 mem);
269 BUG();
270 }
271
272 static void isp1760_init_regs(struct usb_hcd *hcd)
273 {
274 isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
275 isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
276 HC_ATL_PTD_SKIPMAP_REG);
277 isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
278 HC_INT_PTD_SKIPMAP_REG);
279 isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
280 HC_ISO_PTD_SKIPMAP_REG);
281
282 isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
283 HC_ATL_PTD_DONEMAP_REG);
284 isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
285 HC_INT_PTD_DONEMAP_REG);
286 isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
287 HC_ISO_PTD_DONEMAP_REG);
288 }
289
290 static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
291 u32 mask, u32 done, int usec)
292 {
293 u32 result;
294
295 do {
296 result = isp1760_readl(ptr);
297 if (result == ~0)
298 return -ENODEV;
299 result &= mask;
300 if (result == done)
301 return 0;
302 udelay(1);
303 usec--;
304 } while (usec > 0);
305 return -ETIMEDOUT;
306 }
307
308 /* reset a non-running (STS_HALT == 1) controller */
309 static int ehci_reset(struct isp1760_hcd *priv)
310 {
311 int retval;
312 struct usb_hcd *hcd = priv_to_hcd(priv);
313 u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
314
315 command |= CMD_RESET;
316 isp1760_writel(command, hcd->regs + HC_USBCMD);
317 hcd->state = HC_STATE_HALT;
318 priv->next_statechange = jiffies;
319 retval = handshake(priv, hcd->regs + HC_USBCMD,
320 CMD_RESET, 0, 250 * 1000);
321 return retval;
322 }
323
324 static void qh_destroy(struct isp1760_qh *qh)
325 {
326 BUG_ON(!list_empty(&qh->qtd_list));
327 kmem_cache_free(qh_cachep, qh);
328 }
329
330 static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
331 gfp_t flags)
332 {
333 struct isp1760_qh *qh;
334
335 qh = kmem_cache_zalloc(qh_cachep, flags);
336 if (!qh)
337 return qh;
338
339 INIT_LIST_HEAD(&qh->qtd_list);
340 qh->priv = priv;
341 return qh;
342 }
343
344 /* magic numbers that can affect system performance */
345 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
346 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
347 #define EHCI_TUNE_RL_TT 0
348 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
349 #define EHCI_TUNE_MULT_TT 1
350 #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
351
352 /* one-time init, only for memory state */
353 static int priv_init(struct usb_hcd *hcd)
354 {
355 struct isp1760_hcd *priv = hcd_to_priv(hcd);
356 u32 hcc_params;
357
358 spin_lock_init(&priv->lock);
359
360 /*
361 * hw default: 1K periodic list heads, one per frame.
362 * periodic_size can shrink by USBCMD update if hcc_params allows.
363 */
364 priv->periodic_size = DEFAULT_I_TDPS;
365
366 /* controllers may cache some of the periodic schedule ... */
367 hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
368 /* full frame cache */
369 if (HCC_ISOC_CACHE(hcc_params))
370 priv->i_thresh = 8;
371 else /* N microframes cached */
372 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
373
374 return 0;
375 }
376
377 static int isp1760_hc_setup(struct usb_hcd *hcd)
378 {
379 struct isp1760_hcd *priv = hcd_to_priv(hcd);
380 int result;
381 u32 scratch;
382
383 isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
384 scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
385 if (scratch != 0xdeadbabe) {
386 printk(KERN_ERR "ISP1760: Scratch test failed.\n");
387 return -ENODEV;
388 }
389
390 /* pre reset */
391 isp1760_init_regs(hcd);
392
393 /* reset */
394 isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
395 mdelay(100);
396
397 isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
398 mdelay(100);
399
400 result = ehci_reset(priv);
401 if (result)
402 return result;
403
404 /* Step 11 passed */
405
406 isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
407 isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
408
409 /* ATL reset */
410 scratch = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
411 isp1760_writel(scratch | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
412 mdelay(10);
413 isp1760_writel(scratch, hcd->regs + HC_HW_MODE_CTRL);
414
415 isp1760_writel(PORT1_POWER | PORT1_INIT2, hcd->regs + HC_PORT1_CTRL);
416 mdelay(10);
417
418 priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
419
420 return priv_init(hcd);
421 }
422
423 static void isp1760_init_maps(struct usb_hcd *hcd)
424 {
425 /*set last maps, for iso its only 1, else 32 tds bitmap*/
426 isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
427 isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
428 isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
429 }
430
431 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
432 {
433 isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
434 isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
435 isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
436 isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
437 isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
438 isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
439 /* step 23 passed */
440 }
441
442 static int isp1760_run(struct usb_hcd *hcd)
443 {
444 struct isp1760_hcd *priv = hcd_to_priv(hcd);
445 int retval;
446 u32 temp;
447 u32 command;
448 u32 chipid;
449
450 hcd->uses_new_polling = 1;
451 hcd->poll_rh = 0;
452
453 hcd->state = HC_STATE_RUNNING;
454 isp1760_enable_interrupts(hcd);
455 temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
456 temp |= FINAL_HW_CONFIG;
457 isp1760_writel(temp, hcd->regs + HC_HW_MODE_CTRL);
458
459 command = isp1760_readl(hcd->regs + HC_USBCMD);
460 command &= ~(CMD_LRESET|CMD_RESET);
461 command |= CMD_RUN;
462 isp1760_writel(command, hcd->regs + HC_USBCMD);
463
464 retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
465 250 * 1000);
466 if (retval)
467 return retval;
468
469 /*
470 * XXX
471 * Spec says to write FLAG_CF as last config action, priv code grabs
472 * the semaphore while doing so.
473 */
474 down_write(&ehci_cf_port_reset_rwsem);
475 isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
476
477 retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
478 250 * 1000);
479 up_write(&ehci_cf_port_reset_rwsem);
480 if (retval)
481 return retval;
482
483 chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
484 isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
485 chipid >> 16);
486
487 /* PTD Register Init Part 2, Step 28 */
488 /* enable INTs */
489 isp1760_init_maps(hcd);
490
491 /* GRR this is run-once init(), being done every time the HC starts.
492 * So long as they're part of class devices, we can't do it init()
493 * since the class device isn't created that early.
494 */
495 return 0;
496 }
497
498 static u32 base_to_chip(u32 base)
499 {
500 return ((base - 0x400) >> 3);
501 }
502
503 static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
504 struct isp1760_qtd *qtd, struct urb *urb,
505 u32 payload, struct ptd *ptd)
506 {
507 u32 dw0;
508 u32 dw1;
509 u32 dw2;
510 u32 dw3;
511 u32 maxpacket;
512 u32 multi;
513 u32 pid_code;
514 u32 rl = RL_COUNTER;
515 u32 nak = NAK_COUNTER;
516
517 /* according to 3.6.2, max packet len can not be > 0x400 */
518 maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
519 multi = 1 + ((maxpacket >> 11) & 0x3);
520 maxpacket &= 0x7ff;
521
522 /* DW0 */
523 dw0 = PTD_VALID;
524 dw0 |= PTD_LENGTH(qtd->length);
525 dw0 |= PTD_MAXPACKET(maxpacket);
526 dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
527 dw1 = usb_pipeendpoint(urb->pipe) >> 1;
528
529 /* DW1 */
530 dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
531
532 pid_code = qtd->packet_type;
533 dw1 |= PTD_PID_TOKEN(pid_code);
534
535 if (usb_pipebulk(urb->pipe))
536 dw1 |= PTD_TRANS_BULK;
537 else if (usb_pipeint(urb->pipe))
538 dw1 |= PTD_TRANS_INT;
539
540 if (urb->dev->speed != USB_SPEED_HIGH) {
541 /* split transaction */
542
543 dw1 |= PTD_TRANS_SPLIT;
544 if (urb->dev->speed == USB_SPEED_LOW)
545 dw1 |= PTD_SE_USB_LOSPEED;
546
547 dw1 |= PTD_PORT_NUM(urb->dev->ttport);
548 dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
549
550 /* SE bit for Split INT transfers */
551 if (usb_pipeint(urb->pipe) &&
552 (urb->dev->speed == USB_SPEED_LOW))
553 dw1 |= 2 << 16;
554
555 dw3 = 0;
556 rl = 0;
557 nak = 0;
558 } else {
559 dw0 |= PTD_MULTI(multi);
560 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
561 dw3 = qh->ping;
562 else
563 dw3 = 0;
564 }
565 /* DW2 */
566 dw2 = 0;
567 dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
568 dw2 |= PTD_RL_CNT(rl);
569 dw3 |= PTD_NAC_CNT(nak);
570
571 /* DW3 */
572 if (usb_pipecontrol(urb->pipe))
573 dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
574 else
575 dw3 |= qh->toggle;
576
577
578 dw3 |= PTD_ACTIVE;
579 /* Cerr */
580 dw3 |= PTD_CERR(ERR_COUNTER);
581
582 memset(ptd, 0, sizeof(*ptd));
583
584 ptd->dw0 = cpu_to_le32(dw0);
585 ptd->dw1 = cpu_to_le32(dw1);
586 ptd->dw2 = cpu_to_le32(dw2);
587 ptd->dw3 = cpu_to_le32(dw3);
588 }
589
590 static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
591 struct isp1760_qtd *qtd, struct urb *urb,
592 u32 payload, struct ptd *ptd)
593 {
594 u32 maxpacket;
595 u32 multi;
596 u32 numberofusofs;
597 u32 i;
598 u32 usofmask, usof;
599 u32 period;
600
601 maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
602 multi = 1 + ((maxpacket >> 11) & 0x3);
603 maxpacket &= 0x7ff;
604 /* length of the data per uframe */
605 maxpacket = multi * maxpacket;
606
607 numberofusofs = urb->transfer_buffer_length / maxpacket;
608 if (urb->transfer_buffer_length % maxpacket)
609 numberofusofs += 1;
610
611 usofmask = 1;
612 usof = 0;
613 for (i = 0; i < numberofusofs; i++) {
614 usof |= usofmask;
615 usofmask <<= 1;
616 }
617
618 if (urb->dev->speed != USB_SPEED_HIGH) {
619 /* split */
620 ptd->dw5 = __constant_cpu_to_le32(0x1c);
621
622 if (qh->period >= 32)
623 period = qh->period / 2;
624 else
625 period = qh->period;
626
627 } else {
628
629 if (qh->period >= 8)
630 period = qh->period/8;
631 else
632 period = qh->period;
633
634 if (period >= 32)
635 period = 16;
636
637 if (qh->period >= 8) {
638 /* millisecond period */
639 period = (period << 3);
640 } else {
641 /* usof based tranmsfers */
642 /* minimum 4 usofs */
643 usof = 0x11;
644 }
645 }
646
647 ptd->dw2 |= cpu_to_le32(period);
648 ptd->dw4 = cpu_to_le32(usof);
649 }
650
651 static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
652 struct isp1760_qtd *qtd, struct urb *urb,
653 u32 payload, struct ptd *ptd)
654 {
655 transform_into_atl(priv, qh, qtd, urb, payload, ptd);
656 transform_add_int(priv, qh, qtd, urb, payload, ptd);
657 }
658
659 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
660 u32 token)
661 {
662 int count;
663
664 qtd->data_buffer = databuffer;
665 qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
666 qtd->toggle = GET_DATA_TOGGLE(token);
667
668 if (len > HC_ATL_PL_SIZE)
669 count = HC_ATL_PL_SIZE;
670 else
671 count = len;
672
673 qtd->length = count;
674 return count;
675 }
676
677 static int check_error(struct ptd *ptd)
678 {
679 int error = 0;
680 u32 dw3;
681
682 dw3 = le32_to_cpu(ptd->dw3);
683 if (dw3 & DW3_HALT_BIT)
684 error = -EPIPE;
685
686 if (dw3 & DW3_ERROR_BIT) {
687 printk(KERN_ERR "error bit is set in DW3\n");
688 error = -EPIPE;
689 }
690
691 if (dw3 & DW3_QTD_ACTIVE) {
692 printk(KERN_ERR "transfer active bit is set DW3\n");
693 printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
694 (le32_to_cpu(ptd->dw2) >> 25) & 0xf);
695 }
696
697 return error;
698 }
699
700 static void check_int_err_status(u32 dw4)
701 {
702 u32 i;
703
704 dw4 >>= 8;
705
706 for (i = 0; i < 8; i++) {
707 switch (dw4 & 0x7) {
708 case INT_UNDERRUN:
709 printk(KERN_ERR "ERROR: under run , %d\n", i);
710 break;
711
712 case INT_EXACT:
713 printk(KERN_ERR "ERROR: transaction error, %d\n", i);
714 break;
715
716 case INT_BABBLE:
717 printk(KERN_ERR "ERROR: babble error, %d\n", i);
718 break;
719 }
720 dw4 >>= 3;
721 }
722 }
723
724 static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
725 u32 payload)
726 {
727 u32 token;
728 struct usb_hcd *hcd = priv_to_hcd(priv);
729
730 token = qtd->packet_type;
731
732 if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
733 switch (token) {
734 case IN_PID:
735 break;
736 case OUT_PID:
737 case SETUP_PID:
738 priv_write_copy(priv, qtd->data_buffer,
739 hcd->regs + payload,
740 qtd->length);
741 }
742 }
743 }
744
745 static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
746 struct isp1760_hcd *priv, struct isp1760_qh *qh,
747 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
748 {
749 struct ptd ptd;
750 struct usb_hcd *hcd = priv_to_hcd(priv);
751
752 transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
753 priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
754 enqueue_one_qtd(qtd, priv, payload);
755
756 priv->atl_ints[slot].urb = urb;
757 priv->atl_ints[slot].qh = qh;
758 priv->atl_ints[slot].qtd = qtd;
759 priv->atl_ints[slot].data_buffer = qtd->data_buffer;
760 priv->atl_ints[slot].payload = payload;
761 qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
762 qtd->status |= slot << 16;
763 }
764
765 static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
766 struct isp1760_hcd *priv, struct isp1760_qh *qh,
767 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
768 {
769 struct ptd ptd;
770 struct usb_hcd *hcd = priv_to_hcd(priv);
771
772 transform_into_int(priv, qh, qtd, urb, payload, &ptd);
773 priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
774 enqueue_one_qtd(qtd, priv, payload);
775
776 priv->int_ints[slot].urb = urb;
777 priv->int_ints[slot].qh = qh;
778 priv->int_ints[slot].qtd = qtd;
779 priv->int_ints[slot].data_buffer = qtd->data_buffer;
780 priv->int_ints[slot].payload = payload;
781 qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
782 qtd->status |= slot << 16;
783 }
784
785 void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
786 struct isp1760_qtd *qtd)
787 {
788 struct isp1760_hcd *priv = hcd_to_priv(hcd);
789 u32 skip_map, or_map;
790 u32 queue_entry;
791 u32 slot;
792 u32 atl_regs, payload;
793 u32 buffstatus;
794
795 skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
796
797 BUG_ON(!skip_map);
798 slot = __ffs(skip_map);
799 queue_entry = 1 << slot;
800
801 atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
802
803 payload = alloc_mem(priv, qtd->length);
804
805 enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
806
807 or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
808 or_map |= queue_entry;
809 isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
810
811 skip_map &= ~queue_entry;
812 isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
813
814 buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
815 buffstatus |= ATL_BUFFER;
816 isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
817 }
818
819 void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
820 struct isp1760_qtd *qtd)
821 {
822 struct isp1760_hcd *priv = hcd_to_priv(hcd);
823 u32 skip_map, or_map;
824 u32 queue_entry;
825 u32 slot;
826 u32 int_regs, payload;
827 u32 buffstatus;
828
829 skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
830
831 BUG_ON(!skip_map);
832 slot = __ffs(skip_map);
833 queue_entry = 1 << slot;
834
835 int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
836
837 payload = alloc_mem(priv, qtd->length);
838
839 enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
840
841 or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
842 or_map |= queue_entry;
843 isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
844
845 skip_map &= ~queue_entry;
846 isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
847
848 buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
849 buffstatus |= INT_BUFFER;
850 isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
851 }
852
853 static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
854 __releases(priv->lock)
855 __acquires(priv->lock)
856 {
857 if (!urb->unlinked) {
858 if (status == -EINPROGRESS)
859 status = 0;
860 }
861
862 /* complete() can reenter this HCD */
863 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
864 spin_unlock(&priv->lock);
865 usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
866 spin_lock(&priv->lock);
867 }
868
869 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
870 {
871 kmem_cache_free(qtd_cachep, qtd);
872 }
873
874 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
875 {
876 struct isp1760_qtd *tmp_qtd;
877
878 tmp_qtd = qtd->hw_next;
879 list_del(&qtd->qtd_list);
880 isp1760_qtd_free(qtd);
881 return tmp_qtd;
882 }
883
884 /*
885 * Remove this QTD from the QH list and free its memory. If this QTD
886 * isn't the last one than remove also his successor(s).
887 * Returns the QTD which is part of an new URB and should be enqueued.
888 */
889 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
890 {
891 struct isp1760_qtd *tmp_qtd;
892 int last_one;
893
894 do {
895 tmp_qtd = qtd->hw_next;
896 last_one = qtd->status & URB_COMPLETE_NOTIFY;
897 list_del(&qtd->qtd_list);
898 isp1760_qtd_free(qtd);
899 qtd = tmp_qtd;
900 } while (!last_one && qtd);
901
902 return qtd;
903 }
904
905 static void do_atl_int(struct usb_hcd *usb_hcd)
906 {
907 struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
908 u32 done_map, skip_map;
909 struct ptd ptd;
910 struct urb *urb = NULL;
911 u32 atl_regs_base;
912 u32 atl_regs;
913 u32 queue_entry;
914 u32 payload;
915 u32 length;
916 u32 or_map;
917 u32 status = -EINVAL;
918 int error;
919 struct isp1760_qtd *qtd;
920 struct isp1760_qh *qh;
921 u32 rl;
922 u32 nakcount;
923
924 done_map = isp1760_readl(usb_hcd->regs +
925 HC_ATL_PTD_DONEMAP_REG);
926 skip_map = isp1760_readl(usb_hcd->regs +
927 HC_ATL_PTD_SKIPMAP_REG);
928
929 or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
930 or_map &= ~done_map;
931 isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
932
933 atl_regs_base = ATL_REGS_OFFSET;
934 while (done_map) {
935 u32 dw1;
936 u32 dw2;
937 u32 dw3;
938
939 status = 0;
940
941 queue_entry = __ffs(done_map);
942 done_map &= ~(1 << queue_entry);
943 skip_map |= 1 << queue_entry;
944
945 atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
946
947 urb = priv->atl_ints[queue_entry].urb;
948 qtd = priv->atl_ints[queue_entry].qtd;
949 qh = priv->atl_ints[queue_entry].qh;
950 payload = priv->atl_ints[queue_entry].payload;
951
952 if (!qh) {
953 printk(KERN_ERR "qh is 0\n");
954 continue;
955 }
956 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs,
957 atl_regs, sizeof(ptd));
958
959 dw1 = le32_to_cpu(ptd.dw1);
960 dw2 = le32_to_cpu(ptd.dw2);
961 dw3 = le32_to_cpu(ptd.dw3);
962 rl = (dw2 >> 25) & 0x0f;
963 nakcount = (dw3 >> 19) & 0xf;
964
965 /* Transfer Error, *but* active and no HALT -> reload */
966 if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
967 !(dw3 & DW3_HALT_BIT)) {
968
969 /* according to ppriv code, we have to
970 * reload this one if trasfered bytes != requested bytes
971 * else act like everything went smooth..
972 * XXX This just doesn't feel right and hasn't
973 * triggered so far.
974 */
975
976 length = PTD_XFERRED_LENGTH(dw3);
977 printk(KERN_ERR "Should reload now.... transfered %d "
978 "of %zu\n", length, qtd->length);
979 BUG();
980 }
981
982 if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
983 u32 buffstatus;
984
985 /* XXX
986 * NAKs are handled in HW by the chip. Usually if the
987 * device is not able to send data fast enough.
988 * This did not trigger for a long time now.
989 */
990 printk(KERN_ERR "Reloading ptd %p/%p... qh %p readed: "
991 "%d of %zu done: %08x cur: %08x\n", qtd,
992 urb, qh, PTD_XFERRED_LENGTH(dw3),
993 qtd->length, done_map,
994 (1 << queue_entry));
995
996 /* RL counter = ERR counter */
997 dw3 &= ~(0xf << 19);
998 dw3 |= rl << 19;
999 dw3 &= ~(3 << (55 - 32));
1000 dw3 |= ERR_COUNTER << (55 - 32);
1001
1002 /*
1003 * It is not needed to write skip map back because it
1004 * is unchanged. Just make sure that this entry is
1005 * unskipped once it gets written to the HW.
1006 */
1007 skip_map &= ~(1 << queue_entry);
1008 or_map = isp1760_readl(usb_hcd->regs +
1009 HC_ATL_IRQ_MASK_OR_REG);
1010 or_map |= 1 << queue_entry;
1011 isp1760_writel(or_map, usb_hcd->regs +
1012 HC_ATL_IRQ_MASK_OR_REG);
1013
1014 ptd.dw3 = cpu_to_le32(dw3);
1015 priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1016 atl_regs, sizeof(ptd));
1017
1018 ptd.dw0 |= __constant_cpu_to_le32(PTD_VALID);
1019 priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1020 atl_regs, sizeof(ptd));
1021
1022 buffstatus = isp1760_readl(usb_hcd->regs +
1023 HC_BUFFER_STATUS_REG);
1024 buffstatus |= ATL_BUFFER;
1025 isp1760_writel(buffstatus, usb_hcd->regs +
1026 HC_BUFFER_STATUS_REG);
1027 continue;
1028 }
1029
1030 error = check_error(&ptd);
1031 if (error) {
1032 status = error;
1033 priv->atl_ints[queue_entry].qh->toggle = 0;
1034 priv->atl_ints[queue_entry].qh->ping = 0;
1035 urb->status = -EPIPE;
1036
1037 #if 0
1038 printk(KERN_ERR "Error in %s().\n", __func__);
1039 printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1040 "dw3: %08x dw4: %08x dw5: %08x dw6: "
1041 "%08x dw7: %08x\n",
1042 ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1043 ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1044 #endif
1045 } else {
1046 if (usb_pipetype(urb->pipe) == PIPE_BULK) {
1047 priv->atl_ints[queue_entry].qh->toggle = dw3 &
1048 (1 << 25);
1049 priv->atl_ints[queue_entry].qh->ping = dw3 &
1050 (1 << 26);
1051 }
1052 }
1053
1054 length = PTD_XFERRED_LENGTH(dw3);
1055 if (length) {
1056 switch (DW1_GET_PID(dw1)) {
1057 case IN_PID:
1058 priv_read_copy(priv,
1059 priv->atl_ints[queue_entry].data_buffer,
1060 usb_hcd->regs + payload, payload,
1061 length);
1062
1063 case OUT_PID:
1064
1065 urb->actual_length += length;
1066
1067 case SETUP_PID:
1068 break;
1069 }
1070 }
1071
1072 priv->atl_ints[queue_entry].data_buffer = NULL;
1073 priv->atl_ints[queue_entry].urb = NULL;
1074 priv->atl_ints[queue_entry].qtd = NULL;
1075 priv->atl_ints[queue_entry].qh = NULL;
1076
1077 free_mem(priv, payload);
1078
1079 isp1760_writel(skip_map, usb_hcd->regs +
1080 HC_ATL_PTD_SKIPMAP_REG);
1081
1082 if (urb->status == -EPIPE) {
1083 /* HALT was received */
1084
1085 qtd = clean_up_qtdlist(qtd);
1086 isp1760_urb_done(priv, urb, urb->status);
1087
1088 } else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
1089 /* short BULK received */
1090
1091 printk(KERN_ERR "short bulk, %d instead %zu\n", length,
1092 qtd->length);
1093 if (urb->transfer_flags & URB_SHORT_NOT_OK) {
1094 urb->status = -EREMOTEIO;
1095 printk(KERN_ERR "not okey\n");
1096 }
1097
1098 if (urb->status == -EINPROGRESS)
1099 urb->status = 0;
1100
1101 qtd = clean_up_qtdlist(qtd);
1102
1103 isp1760_urb_done(priv, urb, urb->status);
1104
1105 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1106 /* that was the last qtd of that URB */
1107
1108 if (urb->status == -EINPROGRESS)
1109 urb->status = 0;
1110
1111 qtd = clean_this_qtd(qtd);
1112 isp1760_urb_done(priv, urb, urb->status);
1113
1114 } else {
1115 /* next QTD of this URB */
1116
1117 qtd = clean_this_qtd(qtd);
1118 BUG_ON(!qtd);
1119 }
1120
1121 if (qtd)
1122 enqueue_an_ATL_packet(usb_hcd, qh, qtd);
1123
1124 skip_map = isp1760_readl(usb_hcd->regs +
1125 HC_ATL_PTD_SKIPMAP_REG);
1126 }
1127 }
1128
1129 static void do_intl_int(struct usb_hcd *usb_hcd)
1130 {
1131 struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1132 u32 done_map, skip_map;
1133 struct ptd ptd;
1134 struct urb *urb = NULL;
1135 u32 int_regs;
1136 u32 int_regs_base;
1137 u32 payload;
1138 u32 length;
1139 u32 or_map;
1140 int error;
1141 u32 queue_entry;
1142 struct isp1760_qtd *qtd;
1143 struct isp1760_qh *qh;
1144
1145 done_map = isp1760_readl(usb_hcd->regs +
1146 HC_INT_PTD_DONEMAP_REG);
1147 skip_map = isp1760_readl(usb_hcd->regs +
1148 HC_INT_PTD_SKIPMAP_REG);
1149
1150 or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1151 or_map &= ~done_map;
1152 isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1153
1154 int_regs_base = INT_REGS_OFFSET;
1155
1156 while (done_map) {
1157 u32 dw1;
1158 u32 dw3;
1159
1160 queue_entry = __ffs(done_map);
1161 done_map &= ~(1 << queue_entry);
1162 skip_map |= 1 << queue_entry;
1163
1164 int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
1165 urb = priv->int_ints[queue_entry].urb;
1166 qtd = priv->int_ints[queue_entry].qtd;
1167 qh = priv->int_ints[queue_entry].qh;
1168 payload = priv->int_ints[queue_entry].payload;
1169
1170 if (!qh) {
1171 printk(KERN_ERR "(INT) qh is 0\n");
1172 continue;
1173 }
1174
1175 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs,
1176 int_regs, sizeof(ptd));
1177 dw1 = le32_to_cpu(ptd.dw1);
1178 dw3 = le32_to_cpu(ptd.dw3);
1179 check_int_err_status(le32_to_cpu(ptd.dw4));
1180
1181 error = check_error(&ptd);
1182 if (error) {
1183 #if 0
1184 printk(KERN_ERR "Error in %s().\n", __func__);
1185 printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1186 "dw3: %08x dw4: %08x dw5: %08x dw6: "
1187 "%08x dw7: %08x\n",
1188 ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1189 ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1190 #endif
1191 urb->status = -EPIPE;
1192 priv->int_ints[queue_entry].qh->toggle = 0;
1193 priv->int_ints[queue_entry].qh->ping = 0;
1194
1195 } else {
1196 priv->int_ints[queue_entry].qh->toggle =
1197 dw3 & (1 << 25);
1198 priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
1199 }
1200
1201 if (urb->dev->speed != USB_SPEED_HIGH)
1202 length = PTD_XFERRED_LENGTH_LO(dw3);
1203 else
1204 length = PTD_XFERRED_LENGTH(dw3);
1205
1206 if (length) {
1207 switch (DW1_GET_PID(dw1)) {
1208 case IN_PID:
1209 priv_read_copy(priv,
1210 priv->int_ints[queue_entry].data_buffer,
1211 usb_hcd->regs + payload , payload,
1212 length);
1213 case OUT_PID:
1214
1215 urb->actual_length += length;
1216
1217 case SETUP_PID:
1218 break;
1219 }
1220 }
1221
1222 priv->int_ints[queue_entry].data_buffer = NULL;
1223 priv->int_ints[queue_entry].urb = NULL;
1224 priv->int_ints[queue_entry].qtd = NULL;
1225 priv->int_ints[queue_entry].qh = NULL;
1226
1227 isp1760_writel(skip_map, usb_hcd->regs +
1228 HC_INT_PTD_SKIPMAP_REG);
1229 free_mem(priv, payload);
1230
1231 if (urb->status == -EPIPE) {
1232 /* HALT received */
1233
1234 qtd = clean_up_qtdlist(qtd);
1235 isp1760_urb_done(priv, urb, urb->status);
1236
1237 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1238
1239 if (urb->status == -EINPROGRESS)
1240 urb->status = 0;
1241
1242 qtd = clean_this_qtd(qtd);
1243 isp1760_urb_done(priv, urb, urb->status);
1244
1245 } else {
1246 /* next QTD of this URB */
1247
1248 qtd = clean_this_qtd(qtd);
1249 BUG_ON(!qtd);
1250 }
1251
1252 if (qtd)
1253 enqueue_an_INT_packet(usb_hcd, qh, qtd);
1254
1255 skip_map = isp1760_readl(usb_hcd->regs +
1256 HC_INT_PTD_SKIPMAP_REG);
1257 }
1258 }
1259
1260 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1261 static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
1262 gfp_t flags)
1263 {
1264 struct isp1760_qh *qh;
1265 int is_input, type;
1266
1267 qh = isp1760_qh_alloc(priv, flags);
1268 if (!qh)
1269 return qh;
1270
1271 /*
1272 * init endpoint/device data for this QH
1273 */
1274 is_input = usb_pipein(urb->pipe);
1275 type = usb_pipetype(urb->pipe);
1276
1277 if (type == PIPE_INTERRUPT) {
1278
1279 if (urb->dev->speed == USB_SPEED_HIGH) {
1280
1281 qh->period = urb->interval >> 3;
1282 if (qh->period == 0 && urb->interval != 1) {
1283 /* NOTE interval 2 or 4 uframes could work.
1284 * But interval 1 scheduling is simpler, and
1285 * includes high bandwidth.
1286 */
1287 printk(KERN_ERR "intr period %d uframes, NYET!",
1288 urb->interval);
1289 qh_destroy(qh);
1290 return NULL;
1291 }
1292 } else {
1293 qh->period = urb->interval;
1294 }
1295 }
1296
1297 /* support for tt scheduling, and access to toggles */
1298 qh->dev = urb->dev;
1299
1300 if (!usb_pipecontrol(urb->pipe))
1301 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1302 1);
1303 return qh;
1304 }
1305
1306 /*
1307 * For control/bulk/interrupt, return QH with these TDs appended.
1308 * Allocates and initializes the QH if necessary.
1309 * Returns null if it can't allocate a QH it needs to.
1310 * If the QH has TDs (urbs) already, that's great.
1311 */
1312 static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
1313 struct urb *urb, struct list_head *qtd_list, int epnum,
1314 void **ptr)
1315 {
1316 struct isp1760_qh *qh;
1317 struct isp1760_qtd *qtd;
1318 struct isp1760_qtd *prev_qtd;
1319
1320 qh = (struct isp1760_qh *)*ptr;
1321 if (!qh) {
1322 /* can't sleep here, we have priv->lock... */
1323 qh = qh_make(priv, urb, GFP_ATOMIC);
1324 if (!qh)
1325 return qh;
1326 *ptr = qh;
1327 }
1328
1329 qtd = list_entry(qtd_list->next, struct isp1760_qtd,
1330 qtd_list);
1331 if (!list_empty(&qh->qtd_list))
1332 prev_qtd = list_entry(qh->qtd_list.prev,
1333 struct isp1760_qtd, qtd_list);
1334 else
1335 prev_qtd = NULL;
1336
1337 list_splice(qtd_list, qh->qtd_list.prev);
1338 if (prev_qtd) {
1339 BUG_ON(prev_qtd->hw_next);
1340 prev_qtd->hw_next = qtd;
1341 }
1342
1343 urb->hcpriv = qh;
1344 return qh;
1345 }
1346
1347 static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
1348 struct list_head *qtd_list)
1349 {
1350 struct list_head *entry, *temp;
1351
1352 list_for_each_safe(entry, temp, qtd_list) {
1353 struct isp1760_qtd *qtd;
1354
1355 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1356 list_del(&qtd->qtd_list);
1357 isp1760_qtd_free(qtd);
1358 }
1359 }
1360
1361 static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
1362 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1363 {
1364 struct isp1760_qtd *qtd;
1365 int epnum;
1366 unsigned long flags;
1367 struct isp1760_qh *qh = NULL;
1368 int rc;
1369 int qh_busy;
1370
1371 qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1372 epnum = urb->ep->desc.bEndpointAddress;
1373
1374 spin_lock_irqsave(&priv->lock, flags);
1375 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
1376 rc = -ESHUTDOWN;
1377 goto done;
1378 }
1379 rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
1380 if (rc)
1381 goto done;
1382
1383 qh = urb->ep->hcpriv;
1384 if (qh)
1385 qh_busy = !list_empty(&qh->qtd_list);
1386 else
1387 qh_busy = 0;
1388
1389 qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
1390 if (!qh) {
1391 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
1392 rc = -ENOMEM;
1393 goto done;
1394 }
1395
1396 if (!qh_busy)
1397 p(priv_to_hcd(priv), qh, qtd);
1398
1399 done:
1400 spin_unlock_irqrestore(&priv->lock, flags);
1401 if (!qh)
1402 qtd_list_free(priv, urb, qtd_list);
1403 return rc;
1404 }
1405
1406 static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
1407 gfp_t flags)
1408 {
1409 struct isp1760_qtd *qtd;
1410
1411 qtd = kmem_cache_zalloc(qtd_cachep, flags);
1412 if (qtd)
1413 INIT_LIST_HEAD(&qtd->qtd_list);
1414
1415 return qtd;
1416 }
1417
1418 /*
1419 * create a list of filled qtds for this URB; won't link into qh.
1420 */
1421 static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
1422 struct urb *urb, struct list_head *head, gfp_t flags)
1423 {
1424 struct isp1760_qtd *qtd, *qtd_prev;
1425 void *buf;
1426 int len, maxpacket;
1427 int is_input;
1428 u32 token;
1429
1430 /*
1431 * URBs map to sequences of QTDs: one logical transaction
1432 */
1433 qtd = isp1760_qtd_alloc(priv, flags);
1434 if (!qtd)
1435 return NULL;
1436
1437 list_add_tail(&qtd->qtd_list, head);
1438 qtd->urb = urb;
1439 urb->status = -EINPROGRESS;
1440
1441 token = 0;
1442 /* for split transactions, SplitXState initialized to zero */
1443
1444 len = urb->transfer_buffer_length;
1445 is_input = usb_pipein(urb->pipe);
1446 if (usb_pipecontrol(urb->pipe)) {
1447 /* SETUP pid */
1448 qtd_fill(qtd, urb->setup_packet,
1449 sizeof(struct usb_ctrlrequest),
1450 token | SETUP_PID);
1451
1452 /* ... and always at least one more pid */
1453 token ^= DATA_TOGGLE;
1454 qtd_prev = qtd;
1455 qtd = isp1760_qtd_alloc(priv, flags);
1456 if (!qtd)
1457 goto cleanup;
1458 qtd->urb = urb;
1459 qtd_prev->hw_next = qtd;
1460 list_add_tail(&qtd->qtd_list, head);
1461
1462 /* for zero length DATA stages, STATUS is always IN */
1463 if (len == 0)
1464 token |= IN_PID;
1465 }
1466
1467 /*
1468 * data transfer stage: buffer setup
1469 */
1470 buf = urb->transfer_buffer;
1471
1472 if (is_input)
1473 token |= IN_PID;
1474 else
1475 token |= OUT_PID;
1476
1477 maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1478
1479 /*
1480 * buffer gets wrapped in one or more qtds;
1481 * last one may be "short" (including zero len)
1482 * and may serve as a control status ack
1483 */
1484 for (;;) {
1485 int this_qtd_len;
1486
1487 if (!buf && len) {
1488 /* XXX This looks like usb storage / SCSI bug */
1489 printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
1490 (long unsigned)urb->transfer_dma, len);
1491 WARN_ON(1);
1492 }
1493
1494 this_qtd_len = qtd_fill(qtd, buf, len, token);
1495 len -= this_qtd_len;
1496 buf += this_qtd_len;
1497
1498 /* qh makes control packets use qtd toggle; maybe switch it */
1499 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
1500 token ^= DATA_TOGGLE;
1501
1502 if (len <= 0)
1503 break;
1504
1505 qtd_prev = qtd;
1506 qtd = isp1760_qtd_alloc(priv, flags);
1507 if (!qtd)
1508 goto cleanup;
1509 qtd->urb = urb;
1510 qtd_prev->hw_next = qtd;
1511 list_add_tail(&qtd->qtd_list, head);
1512 }
1513
1514 /*
1515 * control requests may need a terminating data "status" ack;
1516 * bulk ones may need a terminating short packet (zero length).
1517 */
1518 if (urb->transfer_buffer_length != 0) {
1519 int one_more = 0;
1520
1521 if (usb_pipecontrol(urb->pipe)) {
1522 one_more = 1;
1523 /* "in" <--> "out" */
1524 token ^= IN_PID;
1525 /* force DATA1 */
1526 token |= DATA_TOGGLE;
1527 } else if (usb_pipebulk(urb->pipe)
1528 && (urb->transfer_flags & URB_ZERO_PACKET)
1529 && !(urb->transfer_buffer_length % maxpacket)) {
1530 one_more = 1;
1531 }
1532 if (one_more) {
1533 qtd_prev = qtd;
1534 qtd = isp1760_qtd_alloc(priv, flags);
1535 if (!qtd)
1536 goto cleanup;
1537 qtd->urb = urb;
1538 qtd_prev->hw_next = qtd;
1539 list_add_tail(&qtd->qtd_list, head);
1540
1541 /* never any data in such packets */
1542 qtd_fill(qtd, NULL, 0, token);
1543 }
1544 }
1545
1546 qtd->status = URB_COMPLETE_NOTIFY;
1547 return head;
1548
1549 cleanup:
1550 qtd_list_free(priv, urb, head);
1551 return NULL;
1552 }
1553
1554 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1555 gfp_t mem_flags)
1556 {
1557 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1558 struct list_head qtd_list;
1559 packet_enqueue *pe;
1560
1561 INIT_LIST_HEAD(&qtd_list);
1562
1563 switch (usb_pipetype(urb->pipe)) {
1564 case PIPE_CONTROL:
1565 case PIPE_BULK:
1566
1567 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1568 return -ENOMEM;
1569 pe = enqueue_an_ATL_packet;
1570 break;
1571
1572 case PIPE_INTERRUPT:
1573 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1574 return -ENOMEM;
1575 pe = enqueue_an_INT_packet;
1576 break;
1577
1578 case PIPE_ISOCHRONOUS:
1579 printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
1580 default:
1581 return -EPIPE;
1582 }
1583
1584 isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
1585 return 0;
1586 }
1587
1588 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1589 int status)
1590 {
1591 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1592 struct inter_packet_info *ints;
1593 u32 i;
1594 u32 reg_base, or_reg, skip_reg;
1595 int flags;
1596 struct ptd ptd;
1597
1598 switch (usb_pipetype(urb->pipe)) {
1599 case PIPE_ISOCHRONOUS:
1600 return -EPIPE;
1601 break;
1602
1603 case PIPE_INTERRUPT:
1604 ints = priv->int_ints;
1605 reg_base = INT_REGS_OFFSET;
1606 or_reg = HC_INT_IRQ_MASK_OR_REG;
1607 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1608 break;
1609
1610 default:
1611 ints = priv->atl_ints;
1612 reg_base = ATL_REGS_OFFSET;
1613 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1614 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1615 break;
1616 }
1617
1618 memset(&ptd, 0, sizeof(ptd));
1619 spin_lock_irqsave(&priv->lock, flags);
1620
1621 for (i = 0; i < 32; i++) {
1622 if (ints->urb == urb) {
1623 u32 skip_map;
1624 u32 or_map;
1625 struct isp1760_qtd *qtd;
1626
1627 skip_map = isp1760_readl(hcd->regs + skip_reg);
1628 skip_map |= 1 << i;
1629 isp1760_writel(skip_map, hcd->regs + skip_reg);
1630
1631 or_map = isp1760_readl(hcd->regs + or_reg);
1632 or_map &= ~(1 << i);
1633 isp1760_writel(or_map, hcd->regs + or_reg);
1634
1635 priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
1636 + i * sizeof(ptd), sizeof(ptd));
1637 qtd = ints->qtd;
1638
1639 clean_up_qtdlist(qtd);
1640
1641 free_mem(priv, ints->payload);
1642
1643 ints->urb = NULL;
1644 ints->qh = NULL;
1645 ints->qtd = NULL;
1646 ints->data_buffer = NULL;
1647 ints->payload = 0;
1648
1649 isp1760_urb_done(priv, urb, status);
1650 break;
1651 }
1652 ints++;
1653 }
1654
1655 spin_unlock_irqrestore(&priv->lock, flags);
1656 return 0;
1657 }
1658
1659 static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
1660 {
1661 struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1662 u32 imask;
1663 irqreturn_t irqret = IRQ_NONE;
1664
1665 spin_lock(&priv->lock);
1666
1667 if (!(usb_hcd->state & HC_STATE_RUNNING))
1668 goto leave;
1669
1670 imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
1671 if (unlikely(!imask))
1672 goto leave;
1673
1674 isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
1675 if (imask & HC_ATL_INT)
1676 do_atl_int(usb_hcd);
1677
1678 if (imask & HC_INTL_INT)
1679 do_intl_int(usb_hcd);
1680
1681 irqret = IRQ_HANDLED;
1682 leave:
1683 spin_unlock(&priv->lock);
1684 return irqret;
1685 }
1686
1687 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1688 {
1689 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1690 u32 temp, status = 0;
1691 u32 mask;
1692 int retval = 1;
1693 unsigned long flags;
1694
1695 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1696 if (!HC_IS_RUNNING(hcd->state))
1697 return 0;
1698
1699 /* init status to no-changes */
1700 buf[0] = 0;
1701 mask = PORT_CSC;
1702
1703 spin_lock_irqsave(&priv->lock, flags);
1704 temp = isp1760_readl(hcd->regs + HC_PORTSC1);
1705
1706 if (temp & PORT_OWNER) {
1707 if (temp & PORT_CSC) {
1708 temp &= ~PORT_CSC;
1709 isp1760_writel(temp, hcd->regs + HC_PORTSC1);
1710 goto done;
1711 }
1712 }
1713
1714 /*
1715 * Return status information even for ports with OWNER set.
1716 * Otherwise khubd wouldn't see the disconnect event when a
1717 * high-speed device is switched over to the companion
1718 * controller by the user.
1719 */
1720
1721 if ((temp & mask) != 0
1722 || ((temp & PORT_RESUME) != 0
1723 && time_after_eq(jiffies,
1724 priv->reset_done))) {
1725 buf [0] |= 1 << (0 + 1);
1726 status = STS_PCD;
1727 }
1728 /* FIXME autosuspend idle root hubs */
1729 done:
1730 spin_unlock_irqrestore(&priv->lock, flags);
1731 return status ? retval : 0;
1732 }
1733
1734 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1735 struct usb_hub_descriptor *desc)
1736 {
1737 int ports = HCS_N_PORTS(priv->hcs_params);
1738 u16 temp;
1739
1740 desc->bDescriptorType = 0x29;
1741 /* priv 1.0, 2.3.9 says 20ms max */
1742 desc->bPwrOn2PwrGood = 10;
1743 desc->bHubContrCurrent = 0;
1744
1745 desc->bNbrPorts = ports;
1746 temp = 1 + (ports / 8);
1747 desc->bDescLength = 7 + 2 * temp;
1748
1749 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1750 memset(&desc->bitmap[0], 0, temp);
1751 memset(&desc->bitmap[temp], 0xff, temp);
1752
1753 /* per-port overcurrent reporting */
1754 temp = 0x0008;
1755 if (HCS_PPC(priv->hcs_params))
1756 /* per-port power control */
1757 temp |= 0x0001;
1758 else
1759 /* no power switching */
1760 temp |= 0x0002;
1761 desc->wHubCharacteristics = cpu_to_le16(temp);
1762 }
1763
1764 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1765
1766 static int check_reset_complete(struct isp1760_hcd *priv, int index,
1767 u32 __iomem *status_reg, int port_status)
1768 {
1769 if (!(port_status & PORT_CONNECT))
1770 return port_status;
1771
1772 /* if reset finished and it's still not enabled -- handoff */
1773 if (!(port_status & PORT_PE)) {
1774
1775 printk(KERN_ERR "port %d full speed --> companion\n",
1776 index + 1);
1777
1778 port_status |= PORT_OWNER;
1779 port_status &= ~PORT_RWC_BITS;
1780 isp1760_writel(port_status, status_reg);
1781
1782 } else
1783 printk(KERN_ERR "port %d high speed\n", index + 1);
1784
1785 return port_status;
1786 }
1787
1788 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1789 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1790 {
1791 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1792 int ports = HCS_N_PORTS(priv->hcs_params);
1793 u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
1794 u32 temp, status;
1795 unsigned long flags;
1796 int retval = 0;
1797 unsigned selector;
1798
1799 /*
1800 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1801 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1802 * (track current state ourselves) ... blink for diagnostics,
1803 * power, "this is the one", etc. EHCI spec supports this.
1804 */
1805
1806 spin_lock_irqsave(&priv->lock, flags);
1807 switch (typeReq) {
1808 case ClearHubFeature:
1809 switch (wValue) {
1810 case C_HUB_LOCAL_POWER:
1811 case C_HUB_OVER_CURRENT:
1812 /* no hub-wide feature/status flags */
1813 break;
1814 default:
1815 goto error;
1816 }
1817 break;
1818 case ClearPortFeature:
1819 if (!wIndex || wIndex > ports)
1820 goto error;
1821 wIndex--;
1822 temp = isp1760_readl(status_reg);
1823
1824 /*
1825 * Even if OWNER is set, so the port is owned by the
1826 * companion controller, khubd needs to be able to clear
1827 * the port-change status bits (especially
1828 * USB_PORT_FEAT_C_CONNECTION).
1829 */
1830
1831 switch (wValue) {
1832 case USB_PORT_FEAT_ENABLE:
1833 isp1760_writel(temp & ~PORT_PE, status_reg);
1834 break;
1835 case USB_PORT_FEAT_C_ENABLE:
1836 /* XXX error? */
1837 break;
1838 case USB_PORT_FEAT_SUSPEND:
1839 if (temp & PORT_RESET)
1840 goto error;
1841
1842 if (temp & PORT_SUSPEND) {
1843 if ((temp & PORT_PE) == 0)
1844 goto error;
1845 /* resume signaling for 20 msec */
1846 temp &= ~(PORT_RWC_BITS);
1847 isp1760_writel(temp | PORT_RESUME,
1848 status_reg);
1849 priv->reset_done = jiffies +
1850 msecs_to_jiffies(20);
1851 }
1852 break;
1853 case USB_PORT_FEAT_C_SUSPEND:
1854 /* we auto-clear this feature */
1855 break;
1856 case USB_PORT_FEAT_POWER:
1857 if (HCS_PPC(priv->hcs_params))
1858 isp1760_writel(temp & ~PORT_POWER, status_reg);
1859 break;
1860 case USB_PORT_FEAT_C_CONNECTION:
1861 isp1760_writel(temp | PORT_CSC,
1862 status_reg);
1863 break;
1864 case USB_PORT_FEAT_C_OVER_CURRENT:
1865 /* XXX error ?*/
1866 break;
1867 case USB_PORT_FEAT_C_RESET:
1868 /* GetPortStatus clears reset */
1869 break;
1870 default:
1871 goto error;
1872 }
1873 isp1760_readl(hcd->regs + HC_USBCMD);
1874 break;
1875 case GetHubDescriptor:
1876 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1877 buf);
1878 break;
1879 case GetHubStatus:
1880 /* no hub-wide feature/status flags */
1881 memset(buf, 0, 4);
1882 break;
1883 case GetPortStatus:
1884 if (!wIndex || wIndex > ports)
1885 goto error;
1886 wIndex--;
1887 status = 0;
1888 temp = isp1760_readl(status_reg);
1889
1890 /* wPortChange bits */
1891 if (temp & PORT_CSC)
1892 status |= 1 << USB_PORT_FEAT_C_CONNECTION;
1893
1894
1895 /* whoever resumes must GetPortStatus to complete it!! */
1896 if (temp & PORT_RESUME) {
1897 printk(KERN_ERR "Port resume should be skipped.\n");
1898
1899 /* Remote Wakeup received? */
1900 if (!priv->reset_done) {
1901 /* resume signaling for 20 msec */
1902 priv->reset_done = jiffies
1903 + msecs_to_jiffies(20);
1904 /* check the port again */
1905 mod_timer(&priv_to_hcd(priv)->rh_timer,
1906 priv->reset_done);
1907 }
1908
1909 /* resume completed? */
1910 else if (time_after_eq(jiffies,
1911 priv->reset_done)) {
1912 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
1913 priv->reset_done = 0;
1914
1915 /* stop resume signaling */
1916 temp = isp1760_readl(status_reg);
1917 isp1760_writel(
1918 temp & ~(PORT_RWC_BITS | PORT_RESUME),
1919 status_reg);
1920 retval = handshake(priv, status_reg,
1921 PORT_RESUME, 0, 2000 /* 2msec */);
1922 if (retval != 0) {
1923 isp1760_err(priv,
1924 "port %d resume error %d\n",
1925 wIndex + 1, retval);
1926 goto error;
1927 }
1928 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
1929 }
1930 }
1931
1932 /* whoever resets must GetPortStatus to complete it!! */
1933 if ((temp & PORT_RESET)
1934 && time_after_eq(jiffies,
1935 priv->reset_done)) {
1936 status |= 1 << USB_PORT_FEAT_C_RESET;
1937 priv->reset_done = 0;
1938
1939 /* force reset to complete */
1940 isp1760_writel(temp & ~PORT_RESET,
1941 status_reg);
1942 /* REVISIT: some hardware needs 550+ usec to clear
1943 * this bit; seems too long to spin routinely...
1944 */
1945 retval = handshake(priv, status_reg,
1946 PORT_RESET, 0, 750);
1947 if (retval != 0) {
1948 isp1760_err(priv, "port %d reset error %d\n",
1949 wIndex + 1, retval);
1950 goto error;
1951 }
1952
1953 /* see what we found out */
1954 temp = check_reset_complete(priv, wIndex, status_reg,
1955 isp1760_readl(status_reg));
1956 }
1957 /*
1958 * Even if OWNER is set, there's no harm letting khubd
1959 * see the wPortStatus values (they should all be 0 except
1960 * for PORT_POWER anyway).
1961 */
1962
1963 if (temp & PORT_OWNER)
1964 printk(KERN_ERR "Warning: PORT_OWNER is set\n");
1965
1966 if (temp & PORT_CONNECT) {
1967 status |= 1 << USB_PORT_FEAT_CONNECTION;
1968 /* status may be from integrated TT */
1969 status |= ehci_port_speed(priv, temp);
1970 }
1971 if (temp & PORT_PE)
1972 status |= 1 << USB_PORT_FEAT_ENABLE;
1973 if (temp & (PORT_SUSPEND|PORT_RESUME))
1974 status |= 1 << USB_PORT_FEAT_SUSPEND;
1975 if (temp & PORT_RESET)
1976 status |= 1 << USB_PORT_FEAT_RESET;
1977 if (temp & PORT_POWER)
1978 status |= 1 << USB_PORT_FEAT_POWER;
1979
1980 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
1981 break;
1982 case SetHubFeature:
1983 switch (wValue) {
1984 case C_HUB_LOCAL_POWER:
1985 case C_HUB_OVER_CURRENT:
1986 /* no hub-wide feature/status flags */
1987 break;
1988 default:
1989 goto error;
1990 }
1991 break;
1992 case SetPortFeature:
1993 selector = wIndex >> 8;
1994 wIndex &= 0xff;
1995 if (!wIndex || wIndex > ports)
1996 goto error;
1997 wIndex--;
1998 temp = isp1760_readl(status_reg);
1999 if (temp & PORT_OWNER)
2000 break;
2001
2002 /* temp &= ~PORT_RWC_BITS; */
2003 switch (wValue) {
2004 case USB_PORT_FEAT_ENABLE:
2005 isp1760_writel(temp | PORT_PE, status_reg);
2006 break;
2007
2008 case USB_PORT_FEAT_SUSPEND:
2009 if ((temp & PORT_PE) == 0
2010 || (temp & PORT_RESET) != 0)
2011 goto error;
2012
2013 isp1760_writel(temp | PORT_SUSPEND, status_reg);
2014 break;
2015 case USB_PORT_FEAT_POWER:
2016 if (HCS_PPC(priv->hcs_params))
2017 isp1760_writel(temp | PORT_POWER,
2018 status_reg);
2019 break;
2020 case USB_PORT_FEAT_RESET:
2021 if (temp & PORT_RESUME)
2022 goto error;
2023 /* line status bits may report this as low speed,
2024 * which can be fine if this root hub has a
2025 * transaction translator built in.
2026 */
2027 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2028 && PORT_USB11(temp)) {
2029 temp |= PORT_OWNER;
2030 } else {
2031 temp |= PORT_RESET;
2032 temp &= ~PORT_PE;
2033
2034 /*
2035 * caller must wait, then call GetPortStatus
2036 * usb 2.0 spec says 50 ms resets on root
2037 */
2038 priv->reset_done = jiffies +
2039 msecs_to_jiffies(50);
2040 }
2041 isp1760_writel(temp, status_reg);
2042 break;
2043 default:
2044 goto error;
2045 }
2046 isp1760_readl(hcd->regs + HC_USBCMD);
2047 break;
2048
2049 default:
2050 error:
2051 /* "stall" on error */
2052 retval = -EPIPE;
2053 }
2054 spin_unlock_irqrestore(&priv->lock, flags);
2055 return retval;
2056 }
2057
2058 static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
2059 struct usb_host_endpoint *ep)
2060 {
2061 struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
2062 struct isp1760_qh *qh;
2063 struct isp1760_qtd *qtd;
2064 u32 flags;
2065
2066 spin_lock_irqsave(&priv->lock, flags);
2067 qh = ep->hcpriv;
2068 if (!qh)
2069 goto out;
2070
2071 ep->hcpriv = NULL;
2072 do {
2073 /* more than entry might get removed */
2074 if (list_empty(&qh->qtd_list))
2075 break;
2076
2077 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2078 qtd_list);
2079
2080 if (qtd->status & URB_ENQUEUED) {
2081
2082 spin_unlock_irqrestore(&priv->lock, flags);
2083 isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
2084 spin_lock_irqsave(&priv->lock, flags);
2085 } else {
2086 struct urb *urb;
2087
2088 urb = qtd->urb;
2089 clean_up_qtdlist(qtd);
2090 isp1760_urb_done(priv, urb, -ECONNRESET);
2091 }
2092 } while (1);
2093
2094 qh_destroy(qh);
2095 /* remove requests and leak them.
2096 * ATL are pretty fast done, INT could take a while...
2097 * The latter shoule be removed
2098 */
2099 out:
2100 spin_unlock_irqrestore(&priv->lock, flags);
2101 }
2102
2103 static int isp1760_get_frame(struct usb_hcd *hcd)
2104 {
2105 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2106 u32 fr;
2107
2108 fr = isp1760_readl(hcd->regs + HC_FRINDEX);
2109 return (fr >> 3) % priv->periodic_size;
2110 }
2111
2112 static void isp1760_stop(struct usb_hcd *hcd)
2113 {
2114 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2115
2116 isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2117 NULL, 0);
2118 mdelay(20);
2119
2120 spin_lock_irq(&priv->lock);
2121 ehci_reset(priv);
2122 /* Disable IRQ */
2123 isp1760_writel(HW_DATA_BUS_32BIT, hcd->regs + HC_HW_MODE_CTRL);
2124 spin_unlock_irq(&priv->lock);
2125
2126 isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
2127 }
2128
2129 static void isp1760_shutdown(struct usb_hcd *hcd)
2130 {
2131 u32 command;
2132
2133 isp1760_stop(hcd);
2134 isp1760_writel(HW_DATA_BUS_32BIT, hcd->regs + HC_HW_MODE_CTRL);
2135
2136 command = isp1760_readl(hcd->regs + HC_USBCMD);
2137 command &= ~CMD_RUN;
2138 isp1760_writel(command, hcd->regs + HC_USBCMD);
2139 }
2140
2141 static const struct hc_driver isp1760_hc_driver = {
2142 .description = "isp1760-hcd",
2143 .product_desc = "NXP ISP1760 USB Host Controller",
2144 .hcd_priv_size = sizeof(struct isp1760_hcd),
2145 .irq = isp1760_irq,
2146 .flags = HCD_MEMORY | HCD_USB2,
2147 .reset = isp1760_hc_setup,
2148 .start = isp1760_run,
2149 .stop = isp1760_stop,
2150 .shutdown = isp1760_shutdown,
2151 .urb_enqueue = isp1760_urb_enqueue,
2152 .urb_dequeue = isp1760_urb_dequeue,
2153 .endpoint_disable = isp1760_endpoint_disable,
2154 .get_frame_number = isp1760_get_frame,
2155 .hub_status_data = isp1760_hub_status_data,
2156 .hub_control = isp1760_hub_control,
2157 };
2158
2159 int __init init_kmem_once(void)
2160 {
2161 qtd_cachep = kmem_cache_create("isp1760_qtd",
2162 sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2163 SLAB_MEM_SPREAD, NULL);
2164
2165 if (!qtd_cachep)
2166 return -ENOMEM;
2167
2168 qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2169 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2170
2171 if (!qh_cachep) {
2172 kmem_cache_destroy(qtd_cachep);
2173 return -ENOMEM;
2174 }
2175
2176 return 0;
2177 }
2178
2179 void deinit_kmem_cache(void)
2180 {
2181 kmem_cache_destroy(qtd_cachep);
2182 kmem_cache_destroy(qh_cachep);
2183 }
2184
2185 struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
2186 u64 irqflags, struct device *dev, const char *busname)
2187 {
2188 struct usb_hcd *hcd;
2189 struct isp1760_hcd *priv;
2190 int ret;
2191
2192 if (usb_disabled())
2193 return ERR_PTR(-ENODEV);
2194
2195 /* prevent usb-core allocating DMA pages */
2196 dev->dma_mask = NULL;
2197
2198 hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev->bus_id);
2199 if (!hcd)
2200 return ERR_PTR(-ENOMEM);
2201
2202 priv = hcd_to_priv(hcd);
2203 init_memory(priv);
2204 hcd->regs = ioremap(res_start, res_len);
2205 if (!hcd->regs) {
2206 ret = -EIO;
2207 goto err_put;
2208 }
2209
2210 hcd->irq = irq;
2211 hcd->rsrc_start = res_start;
2212 hcd->rsrc_len = res_len;
2213
2214 ret = usb_add_hcd(hcd, irq, irqflags);
2215 if (ret)
2216 goto err_unmap;
2217
2218 return hcd;
2219
2220 err_unmap:
2221 iounmap(hcd->regs);
2222
2223 err_put:
2224 usb_put_hcd(hcd);
2225
2226 return ERR_PTR(ret);
2227 }
2228
2229 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2230 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2231 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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