Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * SL811HS HCD (Host Controller Driver) for USB. | |
3 | * | |
4 | * Copyright (C) 2004 Psion Teklogix (for NetBook PRO) | |
1e9a47b6 DB |
5 | * Copyright (C) 2004-2005 David Brownell |
6 | * | |
1da177e4 LT |
7 | * Periodic scheduling is based on Roman's OHCI code |
8 | * Copyright (C) 1999 Roman Weissgaerber | |
9 | * | |
10 | * The SL811HS controller handles host side USB (like the SL11H, but with | |
11 | * another register set and SOF generation) as well as peripheral side USB | |
12 | * (like the SL811S). This driver version doesn't implement the Gadget API | |
13 | * for the peripheral role; or OTG (that'd need much external circuitry). | |
14 | * | |
15 | * For documentation, see the SL811HS spec and the "SL811HS Embedded Host" | |
16 | * document (providing significant pieces missing from that spec); plus | |
17 | * the SL811S spec if you want peripheral side info. | |
1e9a47b6 | 18 | */ |
1da177e4 LT |
19 | |
20 | /* | |
21 | * Status: Passed basic stress testing, works with hubs, mice, keyboards, | |
22 | * and usb-storage. | |
23 | * | |
24 | * TODO: | |
25 | * - usb suspend/resume triggered by sl811 (with USB_SUSPEND) | |
26 | * - various issues noted in the code | |
27 | * - performance work; use both register banks; ... | |
28 | * - use urb->iso_frame_desc[] with ISO transfers | |
29 | */ | |
30 | ||
31 | #undef VERBOSE | |
32 | #undef PACKET_TRACE | |
33 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/ioport.h> | |
39 | #include <linux/sched.h> | |
40 | #include <linux/slab.h> | |
1da177e4 LT |
41 | #include <linux/errno.h> |
42 | #include <linux/init.h> | |
43 | #include <linux/timer.h> | |
44 | #include <linux/list.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/usb.h> | |
325a4af6 | 47 | #include <linux/usb/sl811.h> |
27729aad | 48 | #include <linux/usb/hcd.h> |
d052d1be | 49 | #include <linux/platform_device.h> |
268bb0ce | 50 | #include <linux/prefetch.h> |
1da177e4 LT |
51 | |
52 | #include <asm/io.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/system.h> | |
55 | #include <asm/byteorder.h> | |
8ca5bfab | 56 | #include <asm/unaligned.h> |
1da177e4 | 57 | |
1da177e4 LT |
58 | #include "sl811.h" |
59 | ||
60 | ||
61 | MODULE_DESCRIPTION("SL811HS USB Host Controller Driver"); | |
62 | MODULE_LICENSE("GPL"); | |
f4fce61d | 63 | MODULE_ALIAS("platform:sl811-hcd"); |
1da177e4 | 64 | |
1e9a47b6 | 65 | #define DRIVER_VERSION "19 May 2005" |
1da177e4 LT |
66 | |
67 | ||
68 | #ifndef DEBUG | |
69 | # define STUB_DEBUG_FILE | |
70 | #endif | |
71 | ||
72 | /* for now, use only one transfer register bank */ | |
73 | #undef USE_B | |
74 | ||
1da177e4 LT |
75 | // #define QUIRK2 |
76 | #define QUIRK3 | |
77 | ||
78 | static const char hcd_name[] = "sl811-hcd"; | |
79 | ||
80 | /*-------------------------------------------------------------------------*/ | |
81 | ||
82 | static void port_power(struct sl811 *sl811, int is_on) | |
83 | { | |
84 | struct usb_hcd *hcd = sl811_to_hcd(sl811); | |
85 | ||
86 | /* hub is inactive unless the port is powered */ | |
87 | if (is_on) { | |
749da5f8 | 88 | if (sl811->port1 & USB_PORT_STAT_POWER) |
1da177e4 LT |
89 | return; |
90 | ||
749da5f8 | 91 | sl811->port1 = USB_PORT_STAT_POWER; |
1da177e4 | 92 | sl811->irq_enable = SL11H_INTMASK_INSRMV; |
1da177e4 LT |
93 | } else { |
94 | sl811->port1 = 0; | |
95 | sl811->irq_enable = 0; | |
96 | hcd->state = HC_STATE_HALT; | |
1da177e4 LT |
97 | } |
98 | sl811->ctrl1 = 0; | |
99 | sl811_write(sl811, SL11H_IRQ_ENABLE, 0); | |
100 | sl811_write(sl811, SL11H_IRQ_STATUS, ~0); | |
101 | ||
102 | if (sl811->board && sl811->board->port_power) { | |
103 | /* switch VBUS, at 500mA unless hub power budget gets set */ | |
104 | DBG("power %s\n", is_on ? "on" : "off"); | |
105 | sl811->board->port_power(hcd->self.controller, is_on); | |
106 | } | |
107 | ||
108 | /* reset as thoroughly as we can */ | |
109 | if (sl811->board && sl811->board->reset) | |
110 | sl811->board->reset(hcd->self.controller); | |
1e9a47b6 DB |
111 | else { |
112 | sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0); | |
113 | mdelay(20); | |
114 | } | |
1da177e4 LT |
115 | |
116 | sl811_write(sl811, SL11H_IRQ_ENABLE, 0); | |
117 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
118 | sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT); | |
119 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
120 | ||
121 | // if !is_on, put into lowpower mode now | |
122 | } | |
123 | ||
124 | /*-------------------------------------------------------------------------*/ | |
125 | ||
126 | /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue, | |
127 | * and may start I/O. Endpoint queues are scanned during completion irq | |
093cf723 | 128 | * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation. |
1da177e4 LT |
129 | * |
130 | * Using an external DMA engine to copy a packet at a time could work, | |
131 | * though setup/teardown costs may be too big to make it worthwhile. | |
132 | */ | |
133 | ||
134 | /* SETUP starts a new control request. Devices are not allowed to | |
135 | * STALL or NAK these; they must cancel any pending control requests. | |
136 | */ | |
137 | static void setup_packet( | |
138 | struct sl811 *sl811, | |
139 | struct sl811h_ep *ep, | |
140 | struct urb *urb, | |
141 | u8 bank, | |
142 | u8 control | |
143 | ) | |
144 | { | |
145 | u8 addr; | |
146 | u8 len; | |
147 | void __iomem *data_reg; | |
148 | ||
149 | addr = SL811HS_PACKET_BUF(bank == 0); | |
150 | len = sizeof(struct usb_ctrlrequest); | |
151 | data_reg = sl811->data_reg; | |
152 | sl811_write_buf(sl811, addr, urb->setup_packet, len); | |
153 | ||
154 | /* autoincrementing */ | |
155 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
156 | writeb(len, data_reg); | |
157 | writeb(SL_SETUP /* | ep->epnum */, data_reg); | |
158 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
159 | ||
160 | /* always OUT/data0 */ ; | |
161 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, | |
162 | control | SL11H_HCTLMASK_OUT); | |
163 | ep->length = 0; | |
164 | PACKET("SETUP qh%p\n", ep); | |
165 | } | |
166 | ||
167 | /* STATUS finishes control requests, often after IN or OUT data packets */ | |
168 | static void status_packet( | |
169 | struct sl811 *sl811, | |
170 | struct sl811h_ep *ep, | |
171 | struct urb *urb, | |
172 | u8 bank, | |
173 | u8 control | |
174 | ) | |
175 | { | |
176 | int do_out; | |
177 | void __iomem *data_reg; | |
178 | ||
179 | do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe); | |
180 | data_reg = sl811->data_reg; | |
181 | ||
182 | /* autoincrementing */ | |
183 | sl811_write(sl811, bank + SL11H_BUFADDRREG, 0); | |
184 | writeb(0, data_reg); | |
185 | writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg); | |
186 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
187 | ||
188 | /* always data1; sometimes IN */ | |
189 | control |= SL11H_HCTLMASK_TOGGLE; | |
190 | if (do_out) | |
191 | control |= SL11H_HCTLMASK_OUT; | |
192 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); | |
193 | ep->length = 0; | |
194 | PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "", | |
195 | do_out ? "out" : "in", ep); | |
196 | } | |
197 | ||
198 | /* IN packets can be used with any type of endpoint. here we just | |
199 | * start the transfer, data from the peripheral may arrive later. | |
200 | * urb->iso_frame_desc is currently ignored here... | |
201 | */ | |
202 | static void in_packet( | |
203 | struct sl811 *sl811, | |
204 | struct sl811h_ep *ep, | |
205 | struct urb *urb, | |
206 | u8 bank, | |
207 | u8 control | |
208 | ) | |
209 | { | |
210 | u8 addr; | |
211 | u8 len; | |
212 | void __iomem *data_reg; | |
213 | ||
214 | /* avoid losing data on overflow */ | |
215 | len = ep->maxpacket; | |
216 | addr = SL811HS_PACKET_BUF(bank == 0); | |
217 | if (!(control & SL11H_HCTLMASK_ISOCH) | |
218 | && usb_gettoggle(urb->dev, ep->epnum, 0)) | |
219 | control |= SL11H_HCTLMASK_TOGGLE; | |
220 | data_reg = sl811->data_reg; | |
221 | ||
222 | /* autoincrementing */ | |
223 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
224 | writeb(len, data_reg); | |
225 | writeb(SL_IN | ep->epnum, data_reg); | |
226 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
227 | ||
228 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); | |
16e2e5f6 | 229 | ep->length = min_t(u32, len, |
1da177e4 LT |
230 | urb->transfer_buffer_length - urb->actual_length); |
231 | PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", | |
232 | !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len); | |
233 | } | |
234 | ||
235 | /* OUT packets can be used with any type of endpoint. | |
236 | * urb->iso_frame_desc is currently ignored here... | |
237 | */ | |
238 | static void out_packet( | |
239 | struct sl811 *sl811, | |
240 | struct sl811h_ep *ep, | |
241 | struct urb *urb, | |
242 | u8 bank, | |
243 | u8 control | |
244 | ) | |
245 | { | |
246 | void *buf; | |
247 | u8 addr; | |
248 | u8 len; | |
249 | void __iomem *data_reg; | |
250 | ||
251 | buf = urb->transfer_buffer + urb->actual_length; | |
252 | prefetch(buf); | |
253 | ||
16e2e5f6 | 254 | len = min_t(u32, ep->maxpacket, |
1da177e4 LT |
255 | urb->transfer_buffer_length - urb->actual_length); |
256 | ||
257 | if (!(control & SL11H_HCTLMASK_ISOCH) | |
258 | && usb_gettoggle(urb->dev, ep->epnum, 1)) | |
259 | control |= SL11H_HCTLMASK_TOGGLE; | |
260 | addr = SL811HS_PACKET_BUF(bank == 0); | |
261 | data_reg = sl811->data_reg; | |
262 | ||
263 | sl811_write_buf(sl811, addr, buf, len); | |
264 | ||
265 | /* autoincrementing */ | |
266 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
267 | writeb(len, data_reg); | |
268 | writeb(SL_OUT | ep->epnum, data_reg); | |
269 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
270 | ||
271 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, | |
272 | control | SL11H_HCTLMASK_OUT); | |
273 | ep->length = len; | |
274 | PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", | |
275 | !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len); | |
276 | } | |
277 | ||
278 | /*-------------------------------------------------------------------------*/ | |
279 | ||
280 | /* caller updates on-chip enables later */ | |
281 | ||
282 | static inline void sofirq_on(struct sl811 *sl811) | |
283 | { | |
284 | if (sl811->irq_enable & SL11H_INTMASK_SOFINTR) | |
285 | return; | |
286 | VDBG("sof irq on\n"); | |
287 | sl811->irq_enable |= SL11H_INTMASK_SOFINTR; | |
288 | } | |
289 | ||
290 | static inline void sofirq_off(struct sl811 *sl811) | |
291 | { | |
292 | if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR)) | |
293 | return; | |
294 | VDBG("sof irq off\n"); | |
295 | sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR; | |
296 | } | |
297 | ||
298 | /*-------------------------------------------------------------------------*/ | |
299 | ||
300 | /* pick the next endpoint for a transaction, and issue it. | |
301 | * frames start with periodic transfers (after whatever is pending | |
302 | * from the previous frame), and the rest of the time is async | |
303 | * transfers, scheduled round-robin. | |
304 | */ | |
305 | static struct sl811h_ep *start(struct sl811 *sl811, u8 bank) | |
306 | { | |
307 | struct sl811h_ep *ep; | |
308 | struct urb *urb; | |
309 | int fclock; | |
310 | u8 control; | |
311 | ||
312 | /* use endpoint at schedule head */ | |
313 | if (sl811->next_periodic) { | |
314 | ep = sl811->next_periodic; | |
315 | sl811->next_periodic = ep->next; | |
316 | } else { | |
317 | if (sl811->next_async) | |
318 | ep = sl811->next_async; | |
319 | else if (!list_empty(&sl811->async)) | |
320 | ep = container_of(sl811->async.next, | |
321 | struct sl811h_ep, schedule); | |
322 | else { | |
323 | /* could set up the first fullspeed periodic | |
324 | * transfer for the next frame ... | |
325 | */ | |
326 | return NULL; | |
327 | } | |
328 | ||
329 | #ifdef USE_B | |
330 | if ((bank && sl811->active_b == ep) || sl811->active_a == ep) | |
331 | return NULL; | |
332 | #endif | |
333 | ||
334 | if (ep->schedule.next == &sl811->async) | |
335 | sl811->next_async = NULL; | |
336 | else | |
337 | sl811->next_async = container_of(ep->schedule.next, | |
338 | struct sl811h_ep, schedule); | |
339 | } | |
340 | ||
341 | if (unlikely(list_empty(&ep->hep->urb_list))) { | |
342 | DBG("empty %p queue?\n", ep); | |
343 | return NULL; | |
344 | } | |
345 | ||
346 | urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); | |
347 | control = ep->defctrl; | |
348 | ||
349 | /* if this frame doesn't have enough time left to transfer this | |
350 | * packet, wait till the next frame. too-simple algorithm... | |
351 | */ | |
352 | fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6; | |
353 | fclock -= 100; /* setup takes not much time */ | |
354 | if (urb->dev->speed == USB_SPEED_LOW) { | |
355 | if (control & SL11H_HCTLMASK_PREAMBLE) { | |
356 | /* also note erratum 1: some hubs won't work */ | |
357 | fclock -= 800; | |
358 | } | |
359 | fclock -= ep->maxpacket << 8; | |
360 | ||
361 | /* erratum 2: AFTERSOF only works for fullspeed */ | |
362 | if (fclock < 0) { | |
363 | if (ep->period) | |
364 | sl811->stat_overrun++; | |
365 | sofirq_on(sl811); | |
366 | return NULL; | |
367 | } | |
368 | } else { | |
369 | fclock -= 12000 / 19; /* 19 64byte packets/msec */ | |
370 | if (fclock < 0) { | |
371 | if (ep->period) | |
372 | sl811->stat_overrun++; | |
373 | control |= SL11H_HCTLMASK_AFTERSOF; | |
374 | ||
375 | /* throttle bulk/control irq noise */ | |
376 | } else if (ep->nak_count) | |
377 | control |= SL11H_HCTLMASK_AFTERSOF; | |
378 | } | |
379 | ||
380 | ||
381 | switch (ep->nextpid) { | |
382 | case USB_PID_IN: | |
383 | in_packet(sl811, ep, urb, bank, control); | |
384 | break; | |
385 | case USB_PID_OUT: | |
386 | out_packet(sl811, ep, urb, bank, control); | |
387 | break; | |
388 | case USB_PID_SETUP: | |
389 | setup_packet(sl811, ep, urb, bank, control); | |
390 | break; | |
391 | case USB_PID_ACK: /* for control status */ | |
392 | status_packet(sl811, ep, urb, bank, control); | |
393 | break; | |
394 | default: | |
395 | DBG("bad ep%p pid %02x\n", ep, ep->nextpid); | |
396 | ep = NULL; | |
397 | } | |
398 | return ep; | |
399 | } | |
400 | ||
401 | #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2) | |
402 | ||
403 | static inline void start_transfer(struct sl811 *sl811) | |
404 | { | |
749da5f8 | 405 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) |
1da177e4 LT |
406 | return; |
407 | if (sl811->active_a == NULL) { | |
408 | sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF)); | |
409 | if (sl811->active_a != NULL) | |
410 | sl811->jiffies_a = jiffies + MIN_JIFFIES; | |
411 | } | |
412 | #ifdef USE_B | |
413 | if (sl811->active_b == NULL) { | |
414 | sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF)); | |
415 | if (sl811->active_b != NULL) | |
416 | sl811->jiffies_b = jiffies + MIN_JIFFIES; | |
417 | } | |
418 | #endif | |
419 | } | |
420 | ||
421 | static void finish_request( | |
422 | struct sl811 *sl811, | |
423 | struct sl811h_ep *ep, | |
424 | struct urb *urb, | |
1da177e4 LT |
425 | int status |
426 | ) __releases(sl811->lock) __acquires(sl811->lock) | |
427 | { | |
428 | unsigned i; | |
429 | ||
430 | if (usb_pipecontrol(urb->pipe)) | |
431 | ep->nextpid = USB_PID_SETUP; | |
432 | ||
e9df41c5 | 433 | usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb); |
1da177e4 | 434 | spin_unlock(&sl811->lock); |
4a00027d | 435 | usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status); |
1da177e4 LT |
436 | spin_lock(&sl811->lock); |
437 | ||
438 | /* leave active endpoints in the schedule */ | |
439 | if (!list_empty(&ep->hep->urb_list)) | |
440 | return; | |
441 | ||
442 | /* async deschedule? */ | |
443 | if (!list_empty(&ep->schedule)) { | |
444 | list_del_init(&ep->schedule); | |
445 | if (ep == sl811->next_async) | |
446 | sl811->next_async = NULL; | |
447 | return; | |
448 | } | |
449 | ||
450 | /* periodic deschedule */ | |
451 | DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); | |
452 | for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { | |
453 | struct sl811h_ep *temp; | |
454 | struct sl811h_ep **prev = &sl811->periodic[i]; | |
455 | ||
456 | while (*prev && ((temp = *prev) != ep)) | |
457 | prev = &temp->next; | |
458 | if (*prev) | |
459 | *prev = ep->next; | |
460 | sl811->load[i] -= ep->load; | |
1e9a47b6 | 461 | } |
1da177e4 LT |
462 | ep->branch = PERIODIC_SIZE; |
463 | sl811->periodic_count--; | |
464 | sl811_to_hcd(sl811)->self.bandwidth_allocated | |
465 | -= ep->load / ep->period; | |
466 | if (ep == sl811->next_periodic) | |
467 | sl811->next_periodic = ep->next; | |
468 | ||
469 | /* we might turn SOFs back on again for the async schedule */ | |
470 | if (sl811->periodic_count == 0) | |
471 | sofirq_off(sl811); | |
472 | } | |
473 | ||
474 | static void | |
7d12e780 | 475 | done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank) |
1da177e4 LT |
476 | { |
477 | u8 status; | |
478 | struct urb *urb; | |
479 | int urbstat = -EINPROGRESS; | |
480 | ||
481 | if (unlikely(!ep)) | |
482 | return; | |
483 | ||
484 | status = sl811_read(sl811, bank + SL11H_PKTSTATREG); | |
485 | ||
486 | urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); | |
487 | ||
488 | /* we can safely ignore NAKs */ | |
489 | if (status & SL11H_STATMASK_NAK) { | |
490 | // PACKET("...NAK_%02x qh%p\n", bank, ep); | |
491 | if (!ep->period) | |
492 | ep->nak_count++; | |
493 | ep->error_count = 0; | |
494 | ||
495 | /* ACK advances transfer, toggle, and maybe queue */ | |
496 | } else if (status & SL11H_STATMASK_ACK) { | |
497 | struct usb_device *udev = urb->dev; | |
498 | int len; | |
499 | unsigned char *buf; | |
500 | ||
501 | /* urb->iso_frame_desc is currently ignored here... */ | |
502 | ||
503 | ep->nak_count = ep->error_count = 0; | |
504 | switch (ep->nextpid) { | |
505 | case USB_PID_OUT: | |
506 | // PACKET("...ACK/out_%02x qh%p\n", bank, ep); | |
507 | urb->actual_length += ep->length; | |
508 | usb_dotoggle(udev, ep->epnum, 1); | |
509 | if (urb->actual_length | |
510 | == urb->transfer_buffer_length) { | |
511 | if (usb_pipecontrol(urb->pipe)) | |
512 | ep->nextpid = USB_PID_ACK; | |
513 | ||
514 | /* some bulk protocols terminate OUT transfers | |
515 | * by a short packet, using ZLPs not padding. | |
516 | */ | |
517 | else if (ep->length < ep->maxpacket | |
518 | || !(urb->transfer_flags | |
519 | & URB_ZERO_PACKET)) | |
520 | urbstat = 0; | |
521 | } | |
522 | break; | |
523 | case USB_PID_IN: | |
524 | // PACKET("...ACK/in_%02x qh%p\n", bank, ep); | |
525 | buf = urb->transfer_buffer + urb->actual_length; | |
526 | prefetchw(buf); | |
527 | len = ep->maxpacket - sl811_read(sl811, | |
528 | bank + SL11H_XFERCNTREG); | |
529 | if (len > ep->length) { | |
530 | len = ep->length; | |
65e51098 | 531 | urbstat = -EOVERFLOW; |
1da177e4 LT |
532 | } |
533 | urb->actual_length += len; | |
534 | sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0), | |
535 | buf, len); | |
536 | usb_dotoggle(udev, ep->epnum, 0); | |
65e51098 AS |
537 | if (urbstat == -EINPROGRESS && |
538 | (len < ep->maxpacket || | |
539 | urb->actual_length == | |
540 | urb->transfer_buffer_length)) { | |
541 | if (usb_pipecontrol(urb->pipe)) | |
542 | ep->nextpid = USB_PID_ACK; | |
543 | else | |
544 | urbstat = 0; | |
1da177e4 LT |
545 | } |
546 | break; | |
547 | case USB_PID_SETUP: | |
548 | // PACKET("...ACK/setup_%02x qh%p\n", bank, ep); | |
549 | if (urb->transfer_buffer_length == urb->actual_length) | |
550 | ep->nextpid = USB_PID_ACK; | |
551 | else if (usb_pipeout(urb->pipe)) { | |
552 | usb_settoggle(udev, 0, 1, 1); | |
553 | ep->nextpid = USB_PID_OUT; | |
554 | } else { | |
555 | usb_settoggle(udev, 0, 0, 1); | |
556 | ep->nextpid = USB_PID_IN; | |
557 | } | |
558 | break; | |
559 | case USB_PID_ACK: | |
560 | // PACKET("...ACK/status_%02x qh%p\n", bank, ep); | |
561 | urbstat = 0; | |
562 | break; | |
563 | } | |
564 | ||
565 | /* STALL stops all transfers */ | |
566 | } else if (status & SL11H_STATMASK_STALL) { | |
567 | PACKET("...STALL_%02x qh%p\n", bank, ep); | |
568 | ep->nak_count = ep->error_count = 0; | |
569 | urbstat = -EPIPE; | |
570 | ||
571 | /* error? retry, until "3 strikes" */ | |
572 | } else if (++ep->error_count >= 3) { | |
573 | if (status & SL11H_STATMASK_TMOUT) | |
38e2bfc9 | 574 | urbstat = -ETIME; |
1da177e4 LT |
575 | else if (status & SL11H_STATMASK_OVF) |
576 | urbstat = -EOVERFLOW; | |
577 | else | |
578 | urbstat = -EPROTO; | |
579 | ep->error_count = 0; | |
580 | PACKET("...3STRIKES_%02x %02x qh%p stat %d\n", | |
581 | bank, status, ep, urbstat); | |
582 | } | |
583 | ||
65e51098 | 584 | if (urbstat != -EINPROGRESS || urb->unlinked) |
7d12e780 | 585 | finish_request(sl811, ep, urb, urbstat); |
1da177e4 LT |
586 | } |
587 | ||
588 | static inline u8 checkdone(struct sl811 *sl811) | |
589 | { | |
590 | u8 ctl; | |
591 | u8 irqstat = 0; | |
592 | ||
593 | if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) { | |
594 | ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)); | |
595 | if (ctl & SL11H_HCTLMASK_ARM) | |
596 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); | |
597 | DBG("%s DONE_A: ctrl %02x sts %02x\n", | |
598 | (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", | |
599 | ctl, | |
600 | sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); | |
601 | irqstat |= SL11H_INTMASK_DONE_A; | |
602 | } | |
603 | #ifdef USE_B | |
604 | if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) { | |
605 | ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)); | |
606 | if (ctl & SL11H_HCTLMASK_ARM) | |
607 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); | |
608 | DBG("%s DONE_B: ctrl %02x sts %02x\n", | |
609 | (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", | |
610 | ctl, | |
611 | sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); | |
612 | irqstat |= SL11H_INTMASK_DONE_A; | |
613 | } | |
614 | #endif | |
615 | return irqstat; | |
616 | } | |
617 | ||
7d12e780 | 618 | static irqreturn_t sl811h_irq(struct usb_hcd *hcd) |
1da177e4 LT |
619 | { |
620 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
621 | u8 irqstat; | |
622 | irqreturn_t ret = IRQ_NONE; | |
623 | unsigned retries = 5; | |
624 | ||
625 | spin_lock(&sl811->lock); | |
626 | ||
627 | retry: | |
628 | irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP; | |
629 | if (irqstat) { | |
630 | sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); | |
631 | irqstat &= sl811->irq_enable; | |
632 | } | |
633 | ||
634 | #ifdef QUIRK2 | |
635 | /* this may no longer be necessary ... */ | |
1e9a47b6 | 636 | if (irqstat == 0) { |
1da177e4 | 637 | irqstat = checkdone(sl811); |
1e9a47b6 | 638 | if (irqstat) |
1da177e4 LT |
639 | sl811->stat_lost++; |
640 | } | |
641 | #endif | |
642 | ||
643 | /* USB packets, not necessarily handled in the order they're | |
644 | * issued ... that's fine if they're different endpoints. | |
645 | */ | |
646 | if (irqstat & SL11H_INTMASK_DONE_A) { | |
7d12e780 | 647 | done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF)); |
1da177e4 LT |
648 | sl811->active_a = NULL; |
649 | sl811->stat_a++; | |
650 | } | |
651 | #ifdef USE_B | |
652 | if (irqstat & SL11H_INTMASK_DONE_B) { | |
7d12e780 | 653 | done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF)); |
1da177e4 LT |
654 | sl811->active_b = NULL; |
655 | sl811->stat_b++; | |
656 | } | |
657 | #endif | |
658 | if (irqstat & SL11H_INTMASK_SOFINTR) { | |
659 | unsigned index; | |
660 | ||
661 | index = sl811->frame++ % (PERIODIC_SIZE - 1); | |
662 | sl811->stat_sof++; | |
663 | ||
664 | /* be graceful about almost-inevitable periodic schedule | |
665 | * overruns: continue the previous frame's transfers iff | |
666 | * this one has nothing scheduled. | |
667 | */ | |
668 | if (sl811->next_periodic) { | |
669 | // ERR("overrun to slot %d\n", index); | |
670 | sl811->stat_overrun++; | |
671 | } | |
672 | if (sl811->periodic[index]) | |
673 | sl811->next_periodic = sl811->periodic[index]; | |
674 | } | |
675 | ||
676 | /* khubd manages debouncing and wakeup */ | |
677 | if (irqstat & SL11H_INTMASK_INSRMV) { | |
678 | sl811->stat_insrmv++; | |
679 | ||
680 | /* most stats are reset for each VBUS session */ | |
681 | sl811->stat_wake = 0; | |
682 | sl811->stat_sof = 0; | |
683 | sl811->stat_a = 0; | |
684 | sl811->stat_b = 0; | |
685 | sl811->stat_lost = 0; | |
686 | ||
687 | sl811->ctrl1 = 0; | |
688 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
689 | ||
690 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
691 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
692 | ||
693 | /* usbcore nukes other pending transactions on disconnect */ | |
694 | if (sl811->active_a) { | |
695 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); | |
696 | finish_request(sl811, sl811->active_a, | |
1e9a47b6 DB |
697 | container_of(sl811->active_a |
698 | ->hep->urb_list.next, | |
1da177e4 | 699 | struct urb, urb_list), |
7d12e780 | 700 | -ESHUTDOWN); |
1da177e4 LT |
701 | sl811->active_a = NULL; |
702 | } | |
703 | #ifdef USE_B | |
704 | if (sl811->active_b) { | |
705 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); | |
706 | finish_request(sl811, sl811->active_b, | |
1e9a47b6 DB |
707 | container_of(sl811->active_b |
708 | ->hep->urb_list.next, | |
1da177e4 LT |
709 | struct urb, urb_list), |
710 | NULL, -ESHUTDOWN); | |
711 | sl811->active_b = NULL; | |
712 | } | |
713 | #endif | |
714 | ||
093cf723 | 715 | /* port status seems weird until after reset, so |
1da177e4 LT |
716 | * force the reset and make khubd clean up later. |
717 | */ | |
8a3461e2 | 718 | if (irqstat & SL11H_INTMASK_RD) |
749da5f8 | 719 | sl811->port1 &= ~USB_PORT_STAT_CONNECTION; |
8a3461e2 | 720 | else |
749da5f8 | 721 | sl811->port1 |= USB_PORT_STAT_CONNECTION; |
eb661bc8 | 722 | |
749da5f8 | 723 | sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 LT |
724 | |
725 | } else if (irqstat & SL11H_INTMASK_RD) { | |
749da5f8 | 726 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 727 | DBG("wakeup\n"); |
749da5f8 | 728 | sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 LT |
729 | sl811->stat_wake++; |
730 | } else | |
731 | irqstat &= ~SL11H_INTMASK_RD; | |
732 | } | |
733 | ||
734 | if (irqstat) { | |
749da5f8 | 735 | if (sl811->port1 & USB_PORT_STAT_ENABLE) |
1da177e4 LT |
736 | start_transfer(sl811); |
737 | ret = IRQ_HANDLED; | |
738 | if (retries--) | |
739 | goto retry; | |
740 | } | |
741 | ||
1e9a47b6 | 742 | if (sl811->periodic_count == 0 && list_empty(&sl811->async)) |
1da177e4 LT |
743 | sofirq_off(sl811); |
744 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
745 | ||
746 | spin_unlock(&sl811->lock); | |
747 | ||
748 | return ret; | |
749 | } | |
750 | ||
751 | /*-------------------------------------------------------------------------*/ | |
752 | ||
753 | /* usb 1.1 says max 90% of a frame is available for periodic transfers. | |
754 | * this driver doesn't promise that much since it's got to handle an | |
755 | * IRQ per packet; irq handling latencies also use up that time. | |
4b2e790a DB |
756 | * |
757 | * NOTE: the periodic schedule is a sparse tree, with the load for | |
758 | * each branch minimized. see fig 3.5 in the OHCI spec for example. | |
1da177e4 LT |
759 | */ |
760 | #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */ | |
761 | ||
762 | static int balance(struct sl811 *sl811, u16 period, u16 load) | |
763 | { | |
764 | int i, branch = -ENOSPC; | |
765 | ||
766 | /* search for the least loaded schedule branch of that period | |
767 | * which has enough bandwidth left unreserved. | |
768 | */ | |
769 | for (i = 0; i < period ; i++) { | |
770 | if (branch < 0 || sl811->load[branch] > sl811->load[i]) { | |
771 | int j; | |
772 | ||
773 | for (j = i; j < PERIODIC_SIZE; j += period) { | |
774 | if ((sl811->load[j] + load) | |
775 | > MAX_PERIODIC_LOAD) | |
776 | break; | |
777 | } | |
778 | if (j < PERIODIC_SIZE) | |
779 | continue; | |
1e9a47b6 | 780 | branch = i; |
1da177e4 LT |
781 | } |
782 | } | |
783 | return branch; | |
784 | } | |
785 | ||
786 | /*-------------------------------------------------------------------------*/ | |
787 | ||
788 | static int sl811h_urb_enqueue( | |
789 | struct usb_hcd *hcd, | |
1da177e4 | 790 | struct urb *urb, |
55016f10 | 791 | gfp_t mem_flags |
1da177e4 LT |
792 | ) { |
793 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
794 | struct usb_device *udev = urb->dev; | |
795 | unsigned int pipe = urb->pipe; | |
796 | int is_out = !usb_pipein(pipe); | |
797 | int type = usb_pipetype(pipe); | |
798 | int epnum = usb_pipeendpoint(pipe); | |
799 | struct sl811h_ep *ep = NULL; | |
800 | unsigned long flags; | |
801 | int i; | |
e9df41c5 AS |
802 | int retval; |
803 | struct usb_host_endpoint *hep = urb->ep; | |
1da177e4 | 804 | |
ad7c56f0 | 805 | #ifndef CONFIG_USB_SL811_HCD_ISO |
1da177e4 LT |
806 | if (type == PIPE_ISOCHRONOUS) |
807 | return -ENOSPC; | |
808 | #endif | |
809 | ||
810 | /* avoid all allocations within spinlocks */ | |
76be932a | 811 | if (!hep->hcpriv) { |
7b842b6e | 812 | ep = kzalloc(sizeof *ep, mem_flags); |
76be932a KV |
813 | if (ep == NULL) |
814 | return -ENOMEM; | |
815 | } | |
1da177e4 LT |
816 | |
817 | spin_lock_irqsave(&sl811->lock, flags); | |
818 | ||
819 | /* don't submit to a dead or disabled port */ | |
749da5f8 | 820 | if (!(sl811->port1 & USB_PORT_STAT_ENABLE) |
1da177e4 LT |
821 | || !HC_IS_RUNNING(hcd->state)) { |
822 | retval = -ENODEV; | |
4b2e790a | 823 | kfree(ep); |
e9df41c5 AS |
824 | goto fail_not_linked; |
825 | } | |
826 | retval = usb_hcd_link_urb_to_ep(hcd, urb); | |
827 | if (retval) { | |
828 | kfree(ep); | |
829 | goto fail_not_linked; | |
1da177e4 LT |
830 | } |
831 | ||
832 | if (hep->hcpriv) { | |
833 | kfree(ep); | |
834 | ep = hep->hcpriv; | |
835 | } else if (!ep) { | |
836 | retval = -ENOMEM; | |
837 | goto fail; | |
838 | ||
839 | } else { | |
840 | INIT_LIST_HEAD(&ep->schedule); | |
6a8e87b2 | 841 | ep->udev = udev; |
1da177e4 LT |
842 | ep->epnum = epnum; |
843 | ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out); | |
844 | ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE; | |
845 | usb_settoggle(udev, epnum, is_out, 0); | |
846 | ||
847 | if (type == PIPE_CONTROL) | |
848 | ep->nextpid = USB_PID_SETUP; | |
849 | else if (is_out) | |
850 | ep->nextpid = USB_PID_OUT; | |
851 | else | |
852 | ep->nextpid = USB_PID_IN; | |
853 | ||
854 | if (ep->maxpacket > H_MAXPACKET) { | |
855 | /* iso packets up to 240 bytes could work... */ | |
856 | DBG("dev %d ep%d maxpacket %d\n", | |
857 | udev->devnum, epnum, ep->maxpacket); | |
858 | retval = -EINVAL; | |
2bd15f1f | 859 | kfree(ep); |
1da177e4 LT |
860 | goto fail; |
861 | } | |
862 | ||
863 | if (udev->speed == USB_SPEED_LOW) { | |
864 | /* send preamble for external hub? */ | |
865 | if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD)) | |
866 | ep->defctrl |= SL11H_HCTLMASK_PREAMBLE; | |
867 | } | |
868 | switch (type) { | |
869 | case PIPE_ISOCHRONOUS: | |
870 | case PIPE_INTERRUPT: | |
871 | if (urb->interval > PERIODIC_SIZE) | |
872 | urb->interval = PERIODIC_SIZE; | |
873 | ep->period = urb->interval; | |
874 | ep->branch = PERIODIC_SIZE; | |
875 | if (type == PIPE_ISOCHRONOUS) | |
876 | ep->defctrl |= SL11H_HCTLMASK_ISOCH; | |
877 | ep->load = usb_calc_bus_time(udev->speed, !is_out, | |
878 | (type == PIPE_ISOCHRONOUS), | |
879 | usb_maxpacket(udev, pipe, is_out)) | |
880 | / 1000; | |
881 | break; | |
882 | } | |
883 | ||
1e9a47b6 | 884 | ep->hep = hep; |
1da177e4 LT |
885 | hep->hcpriv = ep; |
886 | } | |
887 | ||
888 | /* maybe put endpoint into schedule */ | |
889 | switch (type) { | |
890 | case PIPE_CONTROL: | |
891 | case PIPE_BULK: | |
892 | if (list_empty(&ep->schedule)) | |
893 | list_add_tail(&ep->schedule, &sl811->async); | |
894 | break; | |
895 | case PIPE_ISOCHRONOUS: | |
896 | case PIPE_INTERRUPT: | |
897 | urb->interval = ep->period; | |
4b2e790a DB |
898 | if (ep->branch < PERIODIC_SIZE) { |
899 | /* NOTE: the phase is correct here, but the value | |
900 | * needs offsetting by the transfer queue depth. | |
901 | * All current drivers ignore start_frame, so this | |
902 | * is unlikely to ever matter... | |
903 | */ | |
904 | urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) | |
905 | + ep->branch; | |
1da177e4 | 906 | break; |
4b2e790a | 907 | } |
1da177e4 LT |
908 | |
909 | retval = balance(sl811, ep->period, ep->load); | |
910 | if (retval < 0) | |
911 | goto fail; | |
912 | ep->branch = retval; | |
913 | retval = 0; | |
914 | urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) | |
915 | + ep->branch; | |
916 | ||
917 | /* sort each schedule branch by period (slow before fast) | |
918 | * to share the faster parts of the tree without needing | |
919 | * dummy/placeholder nodes | |
920 | */ | |
921 | DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); | |
922 | for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { | |
923 | struct sl811h_ep **prev = &sl811->periodic[i]; | |
924 | struct sl811h_ep *here = *prev; | |
925 | ||
926 | while (here && ep != here) { | |
927 | if (ep->period > here->period) | |
928 | break; | |
929 | prev = &here->next; | |
930 | here = *prev; | |
931 | } | |
932 | if (ep != here) { | |
933 | ep->next = here; | |
934 | *prev = ep; | |
935 | } | |
936 | sl811->load[i] += ep->load; | |
937 | } | |
938 | sl811->periodic_count++; | |
939 | hcd->self.bandwidth_allocated += ep->load / ep->period; | |
940 | sofirq_on(sl811); | |
941 | } | |
942 | ||
1da177e4 | 943 | urb->hcpriv = hep; |
1da177e4 LT |
944 | start_transfer(sl811); |
945 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
946 | fail: | |
e9df41c5 AS |
947 | if (retval) |
948 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
949 | fail_not_linked: | |
1da177e4 LT |
950 | spin_unlock_irqrestore(&sl811->lock, flags); |
951 | return retval; | |
952 | } | |
953 | ||
e9df41c5 | 954 | static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
955 | { |
956 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1e9a47b6 | 957 | struct usb_host_endpoint *hep; |
1da177e4 LT |
958 | unsigned long flags; |
959 | struct sl811h_ep *ep; | |
e9df41c5 | 960 | int retval; |
1da177e4 | 961 | |
1e9a47b6 | 962 | spin_lock_irqsave(&sl811->lock, flags); |
e9df41c5 AS |
963 | retval = usb_hcd_check_unlink_urb(hcd, urb, status); |
964 | if (retval) | |
1e9a47b6 | 965 | goto fail; |
1da177e4 | 966 | |
e9df41c5 | 967 | hep = urb->hcpriv; |
1da177e4 LT |
968 | ep = hep->hcpriv; |
969 | if (ep) { | |
970 | /* finish right away if this urb can't be active ... | |
971 | * note that some drivers wrongly expect delays | |
972 | */ | |
973 | if (ep->hep->urb_list.next != &urb->urb_list) { | |
974 | /* not front of queue? never active */ | |
975 | ||
976 | /* for active transfers, we expect an IRQ */ | |
977 | } else if (sl811->active_a == ep) { | |
978 | if (time_before_eq(sl811->jiffies_a, jiffies)) { | |
979 | /* happens a lot with lowspeed?? */ | |
980 | DBG("giveup on DONE_A: ctrl %02x sts %02x\n", | |
981 | sl811_read(sl811, | |
982 | SL811_EP_A(SL11H_HOSTCTLREG)), | |
983 | sl811_read(sl811, | |
984 | SL811_EP_A(SL11H_PKTSTATREG))); | |
985 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), | |
986 | 0); | |
987 | sl811->active_a = NULL; | |
988 | } else | |
989 | urb = NULL; | |
990 | #ifdef USE_B | |
991 | } else if (sl811->active_b == ep) { | |
992 | if (time_before_eq(sl811->jiffies_a, jiffies)) { | |
993 | /* happens a lot with lowspeed?? */ | |
994 | DBG("giveup on DONE_B: ctrl %02x sts %02x\n", | |
995 | sl811_read(sl811, | |
996 | SL811_EP_B(SL11H_HOSTCTLREG)), | |
997 | sl811_read(sl811, | |
998 | SL811_EP_B(SL11H_PKTSTATREG))); | |
999 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), | |
1000 | 0); | |
1001 | sl811->active_b = NULL; | |
1002 | } else | |
1003 | urb = NULL; | |
1004 | #endif | |
1005 | } else { | |
1006 | /* front of queue for inactive endpoint */ | |
1007 | } | |
1008 | ||
1009 | if (urb) | |
7d12e780 | 1010 | finish_request(sl811, ep, urb, 0); |
1da177e4 LT |
1011 | else |
1012 | VDBG("dequeue, urb %p active %s; wait4irq\n", urb, | |
1013 | (sl811->active_a == ep) ? "A" : "B"); | |
1014 | } else | |
1015 | retval = -EINVAL; | |
e9df41c5 | 1016 | fail: |
1da177e4 LT |
1017 | spin_unlock_irqrestore(&sl811->lock, flags); |
1018 | return retval; | |
1019 | } | |
1020 | ||
1021 | static void | |
1022 | sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep) | |
1023 | { | |
1024 | struct sl811h_ep *ep = hep->hcpriv; | |
1025 | ||
1026 | if (!ep) | |
1027 | return; | |
1028 | ||
1029 | /* assume we'd just wait for the irq */ | |
1030 | if (!list_empty(&hep->urb_list)) | |
1031 | msleep(3); | |
1032 | if (!list_empty(&hep->urb_list)) | |
b6c63937 | 1033 | WARNING("ep %p not empty?\n", ep); |
1da177e4 | 1034 | |
1da177e4 LT |
1035 | kfree(ep); |
1036 | hep->hcpriv = NULL; | |
1037 | } | |
1038 | ||
1039 | static int | |
1040 | sl811h_get_frame(struct usb_hcd *hcd) | |
1041 | { | |
1042 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1043 | ||
1044 | /* wrong except while periodic transfers are scheduled; | |
1045 | * never matches the on-the-wire frame; | |
1046 | * subject to overruns. | |
1047 | */ | |
1048 | return sl811->frame; | |
1049 | } | |
1050 | ||
1051 | ||
1052 | /*-------------------------------------------------------------------------*/ | |
1053 | ||
1054 | /* the virtual root hub timer IRQ checks for hub status */ | |
1055 | static int | |
1056 | sl811h_hub_status_data(struct usb_hcd *hcd, char *buf) | |
1057 | { | |
1058 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1059 | #ifdef QUIRK3 | |
1060 | unsigned long flags; | |
1061 | ||
1062 | /* non-SMP HACK: use root hub timer as i/o watchdog | |
1063 | * this seems essential when SOF IRQs aren't in use... | |
1064 | */ | |
1065 | local_irq_save(flags); | |
1066 | if (!timer_pending(&sl811->timer)) { | |
7d12e780 | 1067 | if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE) |
1da177e4 LT |
1068 | sl811->stat_lost++; |
1069 | } | |
1070 | local_irq_restore(flags); | |
1071 | #endif | |
1072 | ||
1073 | if (!(sl811->port1 & (0xffff << 16))) | |
1074 | return 0; | |
1075 | ||
1076 | /* tell khubd port 1 changed */ | |
1077 | *buf = (1 << 1); | |
1078 | return 1; | |
1079 | } | |
1080 | ||
1081 | static void | |
1082 | sl811h_hub_descriptor ( | |
1083 | struct sl811 *sl811, | |
1084 | struct usb_hub_descriptor *desc | |
1085 | ) { | |
1086 | u16 temp = 0; | |
1087 | ||
1088 | desc->bDescriptorType = 0x29; | |
1089 | desc->bHubContrCurrent = 0; | |
1090 | ||
1091 | desc->bNbrPorts = 1; | |
1092 | desc->bDescLength = 9; | |
1093 | ||
1094 | /* per-port power switching (gang of one!), or none */ | |
1095 | desc->bPwrOn2PwrGood = 0; | |
1096 | if (sl811->board && sl811->board->port_power) { | |
1097 | desc->bPwrOn2PwrGood = sl811->board->potpg; | |
1098 | if (!desc->bPwrOn2PwrGood) | |
1099 | desc->bPwrOn2PwrGood = 10; | |
1100 | temp = 0x0001; | |
1101 | } else | |
1102 | temp = 0x0002; | |
1103 | ||
1104 | /* no overcurrent errors detection/handling */ | |
1105 | temp |= 0x0010; | |
1106 | ||
fd05e720 | 1107 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 | 1108 | |
da13051c | 1109 | /* ports removable, and legacy PortPwrCtrlMask */ |
dbe79bbe JY |
1110 | desc->u.hs.DeviceRemovable[0] = 0 << 1; |
1111 | desc->u.hs.DeviceRemovable[1] = ~0; | |
1da177e4 LT |
1112 | } |
1113 | ||
1114 | static void | |
1115 | sl811h_timer(unsigned long _sl811) | |
1116 | { | |
1117 | struct sl811 *sl811 = (void *) _sl811; | |
1118 | unsigned long flags; | |
1119 | u8 irqstat; | |
1120 | u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE; | |
749da5f8 AS |
1121 | const u32 mask = USB_PORT_STAT_CONNECTION |
1122 | | USB_PORT_STAT_ENABLE | |
288ead45 | 1123 | | USB_PORT_STAT_LOW_SPEED; |
1da177e4 LT |
1124 | |
1125 | spin_lock_irqsave(&sl811->lock, flags); | |
1126 | ||
1127 | /* stop special signaling */ | |
1128 | sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE; | |
1129 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1130 | udelay(3); | |
1131 | ||
1132 | irqstat = sl811_read(sl811, SL11H_IRQ_STATUS); | |
1133 | ||
1134 | switch (signaling) { | |
1135 | case SL11H_CTL1MASK_SE0: | |
1136 | DBG("end reset\n"); | |
749da5f8 AS |
1137 | sl811->port1 = (USB_PORT_STAT_C_RESET << 16) |
1138 | | USB_PORT_STAT_POWER; | |
1da177e4 LT |
1139 | sl811->ctrl1 = 0; |
1140 | /* don't wrongly ack RD */ | |
1141 | if (irqstat & SL11H_INTMASK_INSRMV) | |
1142 | irqstat &= ~SL11H_INTMASK_RD; | |
1143 | break; | |
1144 | case SL11H_CTL1MASK_K: | |
1145 | DBG("end resume\n"); | |
749da5f8 | 1146 | sl811->port1 &= ~USB_PORT_STAT_SUSPEND; |
1da177e4 LT |
1147 | break; |
1148 | default: | |
1149 | DBG("odd timer signaling: %02x\n", signaling); | |
1150 | break; | |
1151 | } | |
1152 | sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); | |
1153 | ||
1154 | if (irqstat & SL11H_INTMASK_RD) { | |
1155 | /* usbcore nukes all pending transactions on disconnect */ | |
749da5f8 AS |
1156 | if (sl811->port1 & USB_PORT_STAT_CONNECTION) |
1157 | sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16) | |
1158 | | (USB_PORT_STAT_C_ENABLE << 16); | |
1da177e4 LT |
1159 | sl811->port1 &= ~mask; |
1160 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
1161 | } else { | |
1162 | sl811->port1 |= mask; | |
1163 | if (irqstat & SL11H_INTMASK_DP) | |
288ead45 | 1164 | sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED; |
1da177e4 LT |
1165 | sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD; |
1166 | } | |
1167 | ||
749da5f8 | 1168 | if (sl811->port1 & USB_PORT_STAT_CONNECTION) { |
1da177e4 LT |
1169 | u8 ctrl2 = SL811HS_CTL2_INIT; |
1170 | ||
1171 | sl811->irq_enable |= SL11H_INTMASK_DONE_A; | |
1172 | #ifdef USE_B | |
1173 | sl811->irq_enable |= SL11H_INTMASK_DONE_B; | |
1174 | #endif | |
288ead45 | 1175 | if (sl811->port1 & USB_PORT_STAT_LOW_SPEED) { |
1da177e4 LT |
1176 | sl811->ctrl1 |= SL11H_CTL1MASK_LSPD; |
1177 | ctrl2 |= SL811HS_CTL2MASK_DSWAP; | |
1178 | } | |
1179 | ||
1180 | /* start SOFs flowing, kickstarting with A registers */ | |
1181 | sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA; | |
1182 | sl811_write(sl811, SL11H_SOFLOWREG, 0xe0); | |
1183 | sl811_write(sl811, SL811HS_CTLREG2, ctrl2); | |
1184 | ||
1185 | /* autoincrementing */ | |
1186 | sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0); | |
1187 | writeb(SL_SOF, sl811->data_reg); | |
1188 | writeb(0, sl811->data_reg); | |
1189 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), | |
1190 | SL11H_HCTLMASK_ARM); | |
1191 | ||
1192 | /* khubd provides debounce delay */ | |
1193 | } else { | |
1194 | sl811->ctrl1 = 0; | |
1195 | } | |
1196 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1197 | ||
1198 | /* reenable irqs */ | |
1199 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
1200 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1201 | } | |
1202 | ||
1203 | static int | |
1204 | sl811h_hub_control( | |
1205 | struct usb_hcd *hcd, | |
1206 | u16 typeReq, | |
1207 | u16 wValue, | |
1208 | u16 wIndex, | |
1209 | char *buf, | |
1210 | u16 wLength | |
1211 | ) { | |
1212 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1213 | int retval = 0; | |
1214 | unsigned long flags; | |
1215 | ||
1216 | spin_lock_irqsave(&sl811->lock, flags); | |
1217 | ||
1218 | switch (typeReq) { | |
1219 | case ClearHubFeature: | |
1220 | case SetHubFeature: | |
1221 | switch (wValue) { | |
1222 | case C_HUB_OVER_CURRENT: | |
1223 | case C_HUB_LOCAL_POWER: | |
1224 | break; | |
1225 | default: | |
1226 | goto error; | |
1227 | } | |
1228 | break; | |
1229 | case ClearPortFeature: | |
1230 | if (wIndex != 1 || wLength != 0) | |
1231 | goto error; | |
1232 | ||
1233 | switch (wValue) { | |
1234 | case USB_PORT_FEAT_ENABLE: | |
749da5f8 | 1235 | sl811->port1 &= USB_PORT_STAT_POWER; |
1da177e4 LT |
1236 | sl811->ctrl1 = 0; |
1237 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1238 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
1239 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1240 | sl811->irq_enable); | |
1241 | break; | |
1242 | case USB_PORT_FEAT_SUSPEND: | |
749da5f8 | 1243 | if (!(sl811->port1 & USB_PORT_STAT_SUSPEND)) |
1da177e4 LT |
1244 | break; |
1245 | ||
1246 | /* 20 msec of resume/K signaling, other irqs blocked */ | |
1247 | DBG("start resume...\n"); | |
1248 | sl811->irq_enable = 0; | |
1249 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1250 | sl811->irq_enable); | |
1251 | sl811->ctrl1 |= SL11H_CTL1MASK_K; | |
1252 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1253 | ||
1254 | mod_timer(&sl811->timer, jiffies | |
1255 | + msecs_to_jiffies(20)); | |
1256 | break; | |
1257 | case USB_PORT_FEAT_POWER: | |
1258 | port_power(sl811, 0); | |
1259 | break; | |
1260 | case USB_PORT_FEAT_C_ENABLE: | |
1261 | case USB_PORT_FEAT_C_SUSPEND: | |
1262 | case USB_PORT_FEAT_C_CONNECTION: | |
1263 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
1264 | case USB_PORT_FEAT_C_RESET: | |
1265 | break; | |
1266 | default: | |
1267 | goto error; | |
1268 | } | |
1269 | sl811->port1 &= ~(1 << wValue); | |
1270 | break; | |
1271 | case GetHubDescriptor: | |
1272 | sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf); | |
1273 | break; | |
1274 | case GetHubStatus: | |
8ca5bfab | 1275 | put_unaligned_le32(0, buf); |
1da177e4 LT |
1276 | break; |
1277 | case GetPortStatus: | |
1278 | if (wIndex != 1) | |
1279 | goto error; | |
8ca5bfab | 1280 | put_unaligned_le32(sl811->port1, buf); |
1da177e4 LT |
1281 | |
1282 | #ifndef VERBOSE | |
1283 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ | |
1284 | #endif | |
1285 | DBG("GetPortStatus %08x\n", sl811->port1); | |
1286 | break; | |
1287 | case SetPortFeature: | |
1288 | if (wIndex != 1 || wLength != 0) | |
1289 | goto error; | |
1290 | switch (wValue) { | |
1291 | case USB_PORT_FEAT_SUSPEND: | |
749da5f8 | 1292 | if (sl811->port1 & USB_PORT_STAT_RESET) |
1da177e4 | 1293 | goto error; |
749da5f8 | 1294 | if (!(sl811->port1 & USB_PORT_STAT_ENABLE)) |
1da177e4 LT |
1295 | goto error; |
1296 | ||
1297 | DBG("suspend...\n"); | |
1298 | sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA; | |
1299 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1300 | break; | |
1301 | case USB_PORT_FEAT_POWER: | |
1302 | port_power(sl811, 1); | |
1303 | break; | |
1304 | case USB_PORT_FEAT_RESET: | |
749da5f8 | 1305 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) |
1da177e4 | 1306 | goto error; |
749da5f8 | 1307 | if (!(sl811->port1 & USB_PORT_STAT_POWER)) |
1da177e4 LT |
1308 | break; |
1309 | ||
1310 | /* 50 msec of reset/SE0 signaling, irqs blocked */ | |
1311 | sl811->irq_enable = 0; | |
1312 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1313 | sl811->irq_enable); | |
1314 | sl811->ctrl1 = SL11H_CTL1MASK_SE0; | |
1315 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
749da5f8 | 1316 | sl811->port1 |= USB_PORT_STAT_RESET; |
1da177e4 LT |
1317 | mod_timer(&sl811->timer, jiffies |
1318 | + msecs_to_jiffies(50)); | |
1319 | break; | |
1320 | default: | |
1321 | goto error; | |
1322 | } | |
1323 | sl811->port1 |= 1 << wValue; | |
1324 | break; | |
1325 | ||
1326 | default: | |
1327 | error: | |
1328 | /* "protocol stall" on error */ | |
1329 | retval = -EPIPE; | |
1330 | } | |
1331 | ||
1332 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1333 | return retval; | |
1334 | } | |
1335 | ||
1336 | #ifdef CONFIG_PM | |
1337 | ||
1338 | static int | |
0c0382e3 | 1339 | sl811h_bus_suspend(struct usb_hcd *hcd) |
1da177e4 LT |
1340 | { |
1341 | // SOFs off | |
441b62c1 | 1342 | DBG("%s\n", __func__); |
1da177e4 LT |
1343 | return 0; |
1344 | } | |
1345 | ||
1346 | static int | |
0c0382e3 | 1347 | sl811h_bus_resume(struct usb_hcd *hcd) |
1da177e4 LT |
1348 | { |
1349 | // SOFs on | |
441b62c1 | 1350 | DBG("%s\n", __func__); |
1da177e4 LT |
1351 | return 0; |
1352 | } | |
1353 | ||
1354 | #else | |
1355 | ||
0c0382e3 AS |
1356 | #define sl811h_bus_suspend NULL |
1357 | #define sl811h_bus_resume NULL | |
1da177e4 LT |
1358 | |
1359 | #endif | |
1360 | ||
1361 | ||
1362 | /*-------------------------------------------------------------------------*/ | |
1363 | ||
1364 | #ifdef STUB_DEBUG_FILE | |
1365 | ||
1366 | static inline void create_debug_file(struct sl811 *sl811) { } | |
1367 | static inline void remove_debug_file(struct sl811 *sl811) { } | |
1368 | ||
1369 | #else | |
1370 | ||
1371 | #include <linux/proc_fs.h> | |
1372 | #include <linux/seq_file.h> | |
1373 | ||
1374 | static void dump_irq(struct seq_file *s, char *label, u8 mask) | |
1375 | { | |
1376 | seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask, | |
1377 | (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "", | |
1378 | (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "", | |
1379 | (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "", | |
1380 | (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "", | |
1381 | (mask & SL11H_INTMASK_RD) ? " rd" : "", | |
1382 | (mask & SL11H_INTMASK_DP) ? " dp" : ""); | |
1383 | } | |
1384 | ||
1385 | static int proc_sl811h_show(struct seq_file *s, void *unused) | |
1386 | { | |
1387 | struct sl811 *sl811 = s->private; | |
1388 | struct sl811h_ep *ep; | |
1389 | unsigned i; | |
1390 | ||
1391 | seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n", | |
1392 | sl811_to_hcd(sl811)->product_desc, | |
1393 | hcd_name, DRIVER_VERSION, | |
1394 | sl811->port1); | |
1395 | ||
1396 | seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv); | |
1397 | seq_printf(s, "current session: done_a %ld done_b %ld " | |
1398 | "wake %ld sof %ld overrun %ld lost %ld\n\n", | |
1399 | sl811->stat_a, sl811->stat_b, | |
1400 | sl811->stat_wake, sl811->stat_sof, | |
1401 | sl811->stat_overrun, sl811->stat_lost); | |
1402 | ||
1403 | spin_lock_irq(&sl811->lock); | |
1404 | ||
1405 | if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND) | |
1406 | seq_printf(s, "(suspended)\n\n"); | |
1407 | else { | |
1408 | u8 t = sl811_read(sl811, SL11H_CTLREG1); | |
1409 | ||
1410 | seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t, | |
1411 | (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "", | |
1412 | ({char *s; switch (t & SL11H_CTL1MASK_FORCE) { | |
1413 | case SL11H_CTL1MASK_NORMAL: s = ""; break; | |
1414 | case SL11H_CTL1MASK_SE0: s = " se0/reset"; break; | |
1415 | case SL11H_CTL1MASK_K: s = " k/resume"; break; | |
1416 | default: s = "j"; break; | |
1417 | }; s; }), | |
1418 | (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "", | |
1419 | (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : ""); | |
1420 | ||
1421 | dump_irq(s, "irq_enable", | |
1422 | sl811_read(sl811, SL11H_IRQ_ENABLE)); | |
1423 | dump_irq(s, "irq_status", | |
1424 | sl811_read(sl811, SL11H_IRQ_STATUS)); | |
1425 | seq_printf(s, "frame clocks remaining: %d\n", | |
1426 | sl811_read(sl811, SL11H_SOFTMRREG) << 6); | |
1427 | } | |
1428 | ||
1429 | seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a, | |
1430 | sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)), | |
1431 | sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); | |
1432 | seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b, | |
1433 | sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)), | |
1434 | sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); | |
1435 | seq_printf(s, "\n"); | |
1436 | list_for_each_entry (ep, &sl811->async, schedule) { | |
1437 | struct urb *urb; | |
1438 | ||
1439 | seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d" | |
1440 | " nak %d err %d\n", | |
1441 | (ep == sl811->active_a) ? "(A) " : "", | |
1442 | (ep == sl811->active_b) ? "(B) " : "", | |
1443 | ep, ep->epnum, | |
1444 | ({ char *s; switch (ep->nextpid) { | |
1445 | case USB_PID_IN: s = "in"; break; | |
1446 | case USB_PID_OUT: s = "out"; break; | |
1447 | case USB_PID_SETUP: s = "setup"; break; | |
1448 | case USB_PID_ACK: s = "status"; break; | |
1449 | default: s = "?"; break; | |
1450 | }; s;}), | |
1451 | ep->maxpacket, | |
1452 | ep->nak_count, ep->error_count); | |
1453 | list_for_each_entry (urb, &ep->hep->urb_list, urb_list) { | |
1454 | seq_printf(s, " urb%p, %d/%d\n", urb, | |
1455 | urb->actual_length, | |
1456 | urb->transfer_buffer_length); | |
1457 | } | |
1458 | } | |
1459 | if (!list_empty(&sl811->async)) | |
1460 | seq_printf(s, "\n"); | |
1461 | ||
1462 | seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE); | |
1463 | ||
1464 | for (i = 0; i < PERIODIC_SIZE; i++) { | |
1465 | ep = sl811->periodic[i]; | |
1466 | if (!ep) | |
1467 | continue; | |
1468 | seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]); | |
1469 | ||
1470 | /* DUMB: prints shared entries multiple times */ | |
1471 | do { | |
1472 | seq_printf(s, | |
1473 | " %s%sqh%d/%p (%sdev%d ep%d%s max %d) " | |
1474 | "err %d\n", | |
1475 | (ep == sl811->active_a) ? "(A) " : "", | |
1476 | (ep == sl811->active_b) ? "(B) " : "", | |
1477 | ep->period, ep, | |
1478 | (ep->udev->speed == USB_SPEED_FULL) | |
1479 | ? "" : "ls ", | |
1480 | ep->udev->devnum, ep->epnum, | |
1481 | (ep->epnum == 0) ? "" | |
1482 | : ((ep->nextpid == USB_PID_IN) | |
1483 | ? "in" | |
1484 | : "out"), | |
1485 | ep->maxpacket, ep->error_count); | |
1486 | ep = ep->next; | |
1487 | } while (ep); | |
1488 | } | |
1489 | ||
1490 | spin_unlock_irq(&sl811->lock); | |
1491 | seq_printf(s, "\n"); | |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | static int proc_sl811h_open(struct inode *inode, struct file *file) | |
1497 | { | |
1498 | return single_open(file, proc_sl811h_show, PDE(inode)->data); | |
1499 | } | |
1500 | ||
066202dd | 1501 | static const struct file_operations proc_ops = { |
1da177e4 LT |
1502 | .open = proc_sl811h_open, |
1503 | .read = seq_read, | |
1504 | .llseek = seq_lseek, | |
1505 | .release = single_release, | |
1506 | }; | |
1507 | ||
1508 | /* expect just one sl811 per system */ | |
1509 | static const char proc_filename[] = "driver/sl811h"; | |
1510 | ||
1511 | static void create_debug_file(struct sl811 *sl811) | |
1512 | { | |
cdefa185 | 1513 | sl811->pde = proc_create_data(proc_filename, 0, NULL, &proc_ops, sl811); |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | static void remove_debug_file(struct sl811 *sl811) | |
1517 | { | |
1518 | if (sl811->pde) | |
1519 | remove_proc_entry(proc_filename, NULL); | |
1520 | } | |
1521 | ||
1522 | #endif | |
1523 | ||
1524 | /*-------------------------------------------------------------------------*/ | |
1525 | ||
1526 | static void | |
1527 | sl811h_stop(struct usb_hcd *hcd) | |
1528 | { | |
1529 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1530 | unsigned long flags; | |
1531 | ||
1532 | del_timer_sync(&hcd->rh_timer); | |
1533 | ||
1534 | spin_lock_irqsave(&sl811->lock, flags); | |
1535 | port_power(sl811, 0); | |
1536 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1537 | } | |
1538 | ||
1539 | static int | |
1540 | sl811h_start(struct usb_hcd *hcd) | |
1541 | { | |
1542 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1da177e4 LT |
1543 | |
1544 | /* chip has been reset, VBUS power is off */ | |
1da177e4 LT |
1545 | hcd->state = HC_STATE_RUNNING; |
1546 | ||
bc96c0ad | 1547 | if (sl811->board) { |
0c8624f9 DB |
1548 | if (!device_can_wakeup(hcd->self.controller)) |
1549 | device_init_wakeup(hcd->self.controller, | |
1550 | sl811->board->can_wakeup); | |
bc96c0ad AS |
1551 | hcd->power_budget = sl811->board->power * 2; |
1552 | } | |
1da177e4 | 1553 | |
3a4fa0a2 | 1554 | /* enable power and interrupts */ |
1e9a47b6 DB |
1555 | port_power(sl811, 1); |
1556 | ||
1da177e4 LT |
1557 | return 0; |
1558 | } | |
1559 | ||
1560 | /*-------------------------------------------------------------------------*/ | |
1561 | ||
1562 | static struct hc_driver sl811h_hc_driver = { | |
1563 | .description = hcd_name, | |
1564 | .hcd_priv_size = sizeof(struct sl811), | |
1565 | ||
1566 | /* | |
1567 | * generic hardware linkage | |
1568 | */ | |
1569 | .irq = sl811h_irq, | |
1570 | .flags = HCD_USB11 | HCD_MEMORY, | |
1571 | ||
1572 | /* Basic lifecycle operations */ | |
1573 | .start = sl811h_start, | |
1574 | .stop = sl811h_stop, | |
1575 | ||
1576 | /* | |
1577 | * managing i/o requests and associated device resources | |
1578 | */ | |
1579 | .urb_enqueue = sl811h_urb_enqueue, | |
1580 | .urb_dequeue = sl811h_urb_dequeue, | |
1581 | .endpoint_disable = sl811h_endpoint_disable, | |
1582 | ||
1583 | /* | |
1584 | * periodic schedule support | |
1585 | */ | |
1586 | .get_frame_number = sl811h_get_frame, | |
1587 | ||
1588 | /* | |
1589 | * root hub support | |
1590 | */ | |
1591 | .hub_status_data = sl811h_hub_status_data, | |
1592 | .hub_control = sl811h_hub_control, | |
0c0382e3 AS |
1593 | .bus_suspend = sl811h_bus_suspend, |
1594 | .bus_resume = sl811h_bus_resume, | |
1da177e4 LT |
1595 | }; |
1596 | ||
1597 | /*-------------------------------------------------------------------------*/ | |
1598 | ||
1e9a47b6 | 1599 | static int __devexit |
3ae5eaec | 1600 | sl811h_remove(struct platform_device *dev) |
1da177e4 | 1601 | { |
3ae5eaec | 1602 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 | 1603 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1da177e4 LT |
1604 | struct resource *res; |
1605 | ||
1da177e4 LT |
1606 | remove_debug_file(sl811); |
1607 | usb_remove_hcd(hcd); | |
1608 | ||
1e9a47b6 | 1609 | /* some platforms may use IORESOURCE_IO */ |
3ae5eaec | 1610 | res = platform_get_resource(dev, IORESOURCE_MEM, 1); |
1e9a47b6 DB |
1611 | if (res) |
1612 | iounmap(sl811->data_reg); | |
1da177e4 | 1613 | |
3ae5eaec | 1614 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1e9a47b6 DB |
1615 | if (res) |
1616 | iounmap(sl811->addr_reg); | |
1da177e4 LT |
1617 | |
1618 | usb_put_hcd(hcd); | |
1619 | return 0; | |
1620 | } | |
1621 | ||
1e9a47b6 | 1622 | static int __devinit |
3ae5eaec | 1623 | sl811h_probe(struct platform_device *dev) |
1da177e4 LT |
1624 | { |
1625 | struct usb_hcd *hcd; | |
1626 | struct sl811 *sl811; | |
27140219 | 1627 | struct resource *addr, *data, *ires; |
1da177e4 LT |
1628 | int irq; |
1629 | void __iomem *addr_reg; | |
1630 | void __iomem *data_reg; | |
1631 | int retval; | |
1e9a47b6 | 1632 | u8 tmp, ioaddr = 0; |
27140219 | 1633 | unsigned long irqflags; |
1da177e4 LT |
1634 | |
1635 | /* basic sanity checks first. board-specific init logic should | |
1636 | * have initialized these three resources and probably board | |
1637 | * specific platform_data. we don't probe for IRQs, and do only | |
1638 | * minimal sanity checking. | |
1639 | */ | |
27140219 MZ |
1640 | ires = platform_get_resource(dev, IORESOURCE_IRQ, 0); |
1641 | if (dev->num_resources < 3 || !ires) | |
1da177e4 LT |
1642 | return -ENODEV; |
1643 | ||
27140219 MZ |
1644 | irq = ires->start; |
1645 | irqflags = ires->flags & IRQF_TRIGGER_MASK; | |
1646 | ||
1da177e4 | 1647 | /* refuse to confuse usbcore */ |
3ae5eaec | 1648 | if (dev->dev.dma_mask) { |
1da177e4 LT |
1649 | DBG("no we won't dma\n"); |
1650 | return -EINVAL; | |
1651 | } | |
1652 | ||
1e9a47b6 | 1653 | /* the chip may be wired for either kind of addressing */ |
3ae5eaec RK |
1654 | addr = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1655 | data = platform_get_resource(dev, IORESOURCE_MEM, 1); | |
1e9a47b6 DB |
1656 | retval = -EBUSY; |
1657 | if (!addr || !data) { | |
3ae5eaec RK |
1658 | addr = platform_get_resource(dev, IORESOURCE_IO, 0); |
1659 | data = platform_get_resource(dev, IORESOURCE_IO, 1); | |
1e9a47b6 DB |
1660 | if (!addr || !data) |
1661 | return -ENODEV; | |
1662 | ioaddr = 1; | |
2427ddd8 GKH |
1663 | /* |
1664 | * NOTE: 64-bit resource->start is getting truncated | |
1665 | * to avoid compiler warning, assuming that ->start | |
1666 | * is always 32-bit for this case | |
1667 | */ | |
1668 | addr_reg = (void __iomem *) (unsigned long) addr->start; | |
1669 | data_reg = (void __iomem *) (unsigned long) data->start; | |
1e9a47b6 DB |
1670 | } else { |
1671 | addr_reg = ioremap(addr->start, 1); | |
1672 | if (addr_reg == NULL) { | |
1673 | retval = -ENOMEM; | |
1674 | goto err2; | |
1675 | } | |
1da177e4 | 1676 | |
1e9a47b6 DB |
1677 | data_reg = ioremap(data->start, 1); |
1678 | if (data_reg == NULL) { | |
1679 | retval = -ENOMEM; | |
1680 | goto err4; | |
1681 | } | |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | /* allocate and initialize hcd */ | |
7071a3ce | 1685 | hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev)); |
1da177e4 LT |
1686 | if (!hcd) { |
1687 | retval = -ENOMEM; | |
1688 | goto err5; | |
1689 | } | |
1690 | hcd->rsrc_start = addr->start; | |
1691 | sl811 = hcd_to_sl811(hcd); | |
1692 | ||
1693 | spin_lock_init(&sl811->lock); | |
1694 | INIT_LIST_HEAD(&sl811->async); | |
3ae5eaec | 1695 | sl811->board = dev->dev.platform_data; |
1da177e4 LT |
1696 | init_timer(&sl811->timer); |
1697 | sl811->timer.function = sl811h_timer; | |
1698 | sl811->timer.data = (unsigned long) sl811; | |
1699 | sl811->addr_reg = addr_reg; | |
1700 | sl811->data_reg = data_reg; | |
1701 | ||
1702 | spin_lock_irq(&sl811->lock); | |
1703 | port_power(sl811, 0); | |
1704 | spin_unlock_irq(&sl811->lock); | |
1705 | msleep(200); | |
1706 | ||
1707 | tmp = sl811_read(sl811, SL11H_HWREVREG); | |
1708 | switch (tmp >> 4) { | |
1709 | case 1: | |
1710 | hcd->product_desc = "SL811HS v1.2"; | |
1711 | break; | |
1712 | case 2: | |
1713 | hcd->product_desc = "SL811HS v1.5"; | |
1714 | break; | |
1715 | default: | |
1716 | /* reject case 0, SL11S is less functional */ | |
1717 | DBG("chiprev %02x\n", tmp); | |
1718 | retval = -ENXIO; | |
1719 | goto err6; | |
1720 | } | |
1721 | ||
1e9a47b6 DB |
1722 | /* The chip's IRQ is level triggered, active high. A requirement |
1723 | * for platform device setup is to cope with things like signal | |
1724 | * inverters (e.g. CF is active low) or working only with edge | |
1725 | * triggers (e.g. most ARM CPUs). Initial driver stress testing | |
1726 | * was on a system with single edge triggering, so most sorts of | |
1727 | * triggering arrangement should work. | |
27140219 MZ |
1728 | * |
1729 | * Use resource IRQ flags if set by platform device setup. | |
1e9a47b6 | 1730 | */ |
27140219 | 1731 | irqflags |= IRQF_SHARED; |
b5dd18d8 | 1732 | retval = usb_add_hcd(hcd, irq, irqflags); |
1da177e4 LT |
1733 | if (retval != 0) |
1734 | goto err6; | |
1735 | ||
1736 | create_debug_file(sl811); | |
1737 | return retval; | |
1738 | ||
1739 | err6: | |
1740 | usb_put_hcd(hcd); | |
1741 | err5: | |
1e9a47b6 DB |
1742 | if (!ioaddr) |
1743 | iounmap(data_reg); | |
1da177e4 | 1744 | err4: |
1e9a47b6 DB |
1745 | if (!ioaddr) |
1746 | iounmap(addr_reg); | |
1da177e4 | 1747 | err2: |
1da177e4 LT |
1748 | DBG("init error, %d\n", retval); |
1749 | return retval; | |
1750 | } | |
1751 | ||
1752 | #ifdef CONFIG_PM | |
1753 | ||
1754 | /* for this device there's no useful distinction between the controller | |
1e9a47b6 | 1755 | * and its root hub, except that the root hub only gets direct PM calls |
1da177e4 LT |
1756 | * when CONFIG_USB_SUSPEND is enabled. |
1757 | */ | |
1758 | ||
1759 | static int | |
3ae5eaec | 1760 | sl811h_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 1761 | { |
3ae5eaec | 1762 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
1763 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1764 | int retval = 0; | |
1765 | ||
18584999 DB |
1766 | switch (state.event) { |
1767 | case PM_EVENT_FREEZE: | |
0c0382e3 | 1768 | retval = sl811h_bus_suspend(hcd); |
18584999 DB |
1769 | break; |
1770 | case PM_EVENT_SUSPEND: | |
3a2d5b70 | 1771 | case PM_EVENT_HIBERNATE: |
18584999 | 1772 | case PM_EVENT_PRETHAW: /* explicitly discard hw state */ |
1da177e4 | 1773 | port_power(sl811, 0); |
18584999 DB |
1774 | break; |
1775 | } | |
1da177e4 LT |
1776 | return retval; |
1777 | } | |
1778 | ||
1779 | static int | |
3ae5eaec | 1780 | sl811h_resume(struct platform_device *dev) |
1da177e4 | 1781 | { |
3ae5eaec | 1782 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
1783 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1784 | ||
1da177e4 LT |
1785 | /* with no "check to see if VBUS is still powered" board hook, |
1786 | * let's assume it'd only be powered to enable remote wakeup. | |
1787 | */ | |
70a1c9e0 | 1788 | if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) { |
1da177e4 LT |
1789 | sl811->port1 = 0; |
1790 | port_power(sl811, 1); | |
1c50c317 | 1791 | usb_root_hub_lost_power(hcd->self.root_hub); |
1da177e4 LT |
1792 | return 0; |
1793 | } | |
1794 | ||
0c0382e3 | 1795 | return sl811h_bus_resume(hcd); |
1da177e4 LT |
1796 | } |
1797 | ||
1798 | #else | |
1799 | ||
1800 | #define sl811h_suspend NULL | |
1801 | #define sl811h_resume NULL | |
1802 | ||
1803 | #endif | |
1804 | ||
1805 | ||
1e9a47b6 | 1806 | /* this driver is exported so sl811_cs can depend on it */ |
3ae5eaec | 1807 | struct platform_driver sl811h_driver = { |
1da177e4 | 1808 | .probe = sl811h_probe, |
1e9a47b6 | 1809 | .remove = __devexit_p(sl811h_remove), |
1da177e4 LT |
1810 | |
1811 | .suspend = sl811h_suspend, | |
1812 | .resume = sl811h_resume, | |
3ae5eaec RK |
1813 | .driver = { |
1814 | .name = (char *) hcd_name, | |
1815 | .owner = THIS_MODULE, | |
1816 | }, | |
1da177e4 | 1817 | }; |
1e9a47b6 | 1818 | EXPORT_SYMBOL(sl811h_driver); |
1da177e4 LT |
1819 | |
1820 | /*-------------------------------------------------------------------------*/ | |
1e9a47b6 DB |
1821 | |
1822 | static int __init sl811h_init(void) | |
1da177e4 LT |
1823 | { |
1824 | if (usb_disabled()) | |
1825 | return -ENODEV; | |
1826 | ||
1827 | INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION); | |
3ae5eaec | 1828 | return platform_driver_register(&sl811h_driver); |
1da177e4 LT |
1829 | } |
1830 | module_init(sl811h_init); | |
1831 | ||
1e9a47b6 DB |
1832 | static void __exit sl811h_cleanup(void) |
1833 | { | |
3ae5eaec | 1834 | platform_driver_unregister(&sl811h_driver); |
1da177e4 LT |
1835 | } |
1836 | module_exit(sl811h_cleanup); |