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USB 3.0 Hub Changes
[deliverable/linux.git] / drivers / usb / host / isp116x-hcd.c
1 /*
2 * ISP116x HCD (Host Controller Driver) for USB.
3 *
4 * Derived from the SL811 HCD, rewritten for ISP116x.
5 * Copyright (C) 2005 Olav Kongas <ok@artecdesign.ee>
6 *
7 * Portions:
8 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
9 * Copyright (C) 2004 David Brownell
10 *
11 * Periodic scheduling is based on Roman's OHCI code
12 * Copyright (C) 1999 Roman Weissgaerber
13 *
14 */
15
16 /*
17 * The driver basically works. A number of people have used it with a range
18 * of devices.
19 *
20 * The driver passes all usbtests 1-14.
21 *
22 * Suspending/resuming of root hub via sysfs works. Remote wakeup works too.
23 * And suspending/resuming of platform device works too. Suspend/resume
24 * via HCD operations vector is not implemented.
25 *
26 * Iso transfer support is not implemented. Adding this would include
27 * implementing recovery from the failure to service the processed ITL
28 * fifo ram in time, which will involve chip reset.
29 *
30 * TODO:
31 + More testing of suspend/resume.
32 */
33
34 /*
35 ISP116x chips require certain delays between accesses to its
36 registers. The following timing options exist.
37
38 1. Configure your memory controller (the best)
39 2. Implement platform-specific delay function possibly
40 combined with configuring the memory controller; see
41 include/linux/usb-isp116x.h for more info. Some broken
42 memory controllers line LH7A400 SMC need this. Also,
43 uncomment for that to work the following
44 USE_PLATFORM_DELAY macro.
45 3. Use ndelay (easiest, poorest). For that, uncomment
46 the following USE_NDELAY macro.
47 */
48 #define USE_PLATFORM_DELAY
49 //#define USE_NDELAY
50
51 //#define DEBUG
52 //#define VERBOSE
53 /* Transfer descriptors. See dump_ptd() for printout format */
54 //#define PTD_TRACE
55 /* enqueuing/finishing log of urbs */
56 //#define URB_TRACE
57
58 #include <linux/module.h>
59 #include <linux/delay.h>
60 #include <linux/debugfs.h>
61 #include <linux/seq_file.h>
62 #include <linux/errno.h>
63 #include <linux/init.h>
64 #include <linux/list.h>
65 #include <linux/slab.h>
66 #include <linux/usb.h>
67 #include <linux/usb/isp116x.h>
68 #include <linux/usb/hcd.h>
69 #include <linux/platform_device.h>
70
71 #include <asm/io.h>
72 #include <asm/irq.h>
73 #include <asm/system.h>
74 #include <asm/byteorder.h>
75
76 #include "isp116x.h"
77
78 #define DRIVER_VERSION "03 Nov 2005"
79 #define DRIVER_DESC "ISP116x USB Host Controller Driver"
80
81 MODULE_DESCRIPTION(DRIVER_DESC);
82 MODULE_LICENSE("GPL");
83
84 static const char hcd_name[] = "isp116x-hcd";
85
86 /*-----------------------------------------------------------------*/
87
88 /*
89 Write len bytes to fifo, pad till 32-bit boundary
90 */
91 static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len)
92 {
93 u8 *dp = (u8 *) buf;
94 u16 *dp2 = (u16 *) buf;
95 u16 w;
96 int quot = len % 4;
97
98 /* buffer is already in 'usb data order', which is LE. */
99 /* When reading buffer as u16, we have to take care byte order */
100 /* doesn't get mixed up */
101
102 if ((unsigned long)dp2 & 1) {
103 /* not aligned */
104 for (; len > 1; len -= 2) {
105 w = *dp++;
106 w |= *dp++ << 8;
107 isp116x_raw_write_data16(isp116x, w);
108 }
109 if (len)
110 isp116x_write_data16(isp116x, (u16) * dp);
111 } else {
112 /* aligned */
113 for (; len > 1; len -= 2) {
114 /* Keep byte order ! */
115 isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++));
116 }
117
118 if (len)
119 isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2));
120 }
121 if (quot == 1 || quot == 2)
122 isp116x_raw_write_data16(isp116x, 0);
123 }
124
125 /*
126 Read len bytes from fifo and then read till 32-bit boundary.
127 */
128 static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len)
129 {
130 u8 *dp = (u8 *) buf;
131 u16 *dp2 = (u16 *) buf;
132 u16 w;
133 int quot = len % 4;
134
135 /* buffer is already in 'usb data order', which is LE. */
136 /* When reading buffer as u16, we have to take care byte order */
137 /* doesn't get mixed up */
138
139 if ((unsigned long)dp2 & 1) {
140 /* not aligned */
141 for (; len > 1; len -= 2) {
142 w = isp116x_raw_read_data16(isp116x);
143 *dp++ = w & 0xff;
144 *dp++ = (w >> 8) & 0xff;
145 }
146
147 if (len)
148 *dp = 0xff & isp116x_read_data16(isp116x);
149 } else {
150 /* aligned */
151 for (; len > 1; len -= 2) {
152 /* Keep byte order! */
153 *dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x));
154 }
155
156 if (len)
157 *(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x);
158 }
159 if (quot == 1 || quot == 2)
160 isp116x_raw_read_data16(isp116x);
161 }
162
163 /*
164 Write ptd's and data for scheduled transfers into
165 the fifo ram. Fifo must be empty and ready.
166 */
167 static void pack_fifo(struct isp116x *isp116x)
168 {
169 struct isp116x_ep *ep;
170 struct ptd *ptd;
171 int buflen = isp116x->atl_last_dir == PTD_DIR_IN
172 ? isp116x->atl_bufshrt : isp116x->atl_buflen;
173
174 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
175 isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
176 isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET);
177 for (ep = isp116x->atl_active; ep; ep = ep->active) {
178 ptd = &ep->ptd;
179 dump_ptd(ptd);
180 dump_ptd_out_data(ptd, ep->data);
181 isp116x_write_data16(isp116x, ptd->count);
182 isp116x_write_data16(isp116x, ptd->mps);
183 isp116x_write_data16(isp116x, ptd->len);
184 isp116x_write_data16(isp116x, ptd->faddr);
185 buflen -= sizeof(struct ptd);
186 /* Skip writing data for last IN PTD */
187 if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) {
188 write_ptddata_to_fifo(isp116x, ep->data, ep->length);
189 buflen -= ALIGN(ep->length, 4);
190 }
191 }
192 BUG_ON(buflen);
193 }
194
195 /*
196 Read the processed ptd's and data from fifo ram back to
197 URBs' buffers. Fifo must be full and done
198 */
199 static void unpack_fifo(struct isp116x *isp116x)
200 {
201 struct isp116x_ep *ep;
202 struct ptd *ptd;
203 int buflen = isp116x->atl_last_dir == PTD_DIR_IN
204 ? isp116x->atl_buflen : isp116x->atl_bufshrt;
205
206 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
207 isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
208 isp116x_write_addr(isp116x, HCATLPORT);
209 for (ep = isp116x->atl_active; ep; ep = ep->active) {
210 ptd = &ep->ptd;
211 ptd->count = isp116x_read_data16(isp116x);
212 ptd->mps = isp116x_read_data16(isp116x);
213 ptd->len = isp116x_read_data16(isp116x);
214 ptd->faddr = isp116x_read_data16(isp116x);
215 buflen -= sizeof(struct ptd);
216 /* Skip reading data for last Setup or Out PTD */
217 if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) {
218 read_ptddata_from_fifo(isp116x, ep->data, ep->length);
219 buflen -= ALIGN(ep->length, 4);
220 }
221 dump_ptd(ptd);
222 dump_ptd_in_data(ptd, ep->data);
223 }
224 BUG_ON(buflen);
225 }
226
227 /*---------------------------------------------------------------*/
228
229 /*
230 Set up PTD's.
231 */
232 static void preproc_atl_queue(struct isp116x *isp116x)
233 {
234 struct isp116x_ep *ep;
235 struct urb *urb;
236 struct ptd *ptd;
237 u16 len;
238
239 for (ep = isp116x->atl_active; ep; ep = ep->active) {
240 u16 toggle = 0, dir = PTD_DIR_SETUP;
241
242 BUG_ON(list_empty(&ep->hep->urb_list));
243 urb = container_of(ep->hep->urb_list.next,
244 struct urb, urb_list);
245 ptd = &ep->ptd;
246 len = ep->length;
247 ep->data = (unsigned char *)urb->transfer_buffer
248 + urb->actual_length;
249
250 switch (ep->nextpid) {
251 case USB_PID_IN:
252 toggle = usb_gettoggle(urb->dev, ep->epnum, 0);
253 dir = PTD_DIR_IN;
254 break;
255 case USB_PID_OUT:
256 toggle = usb_gettoggle(urb->dev, ep->epnum, 1);
257 dir = PTD_DIR_OUT;
258 break;
259 case USB_PID_SETUP:
260 len = sizeof(struct usb_ctrlrequest);
261 ep->data = urb->setup_packet;
262 break;
263 case USB_PID_ACK:
264 toggle = 1;
265 len = 0;
266 dir = (urb->transfer_buffer_length
267 && usb_pipein(urb->pipe))
268 ? PTD_DIR_OUT : PTD_DIR_IN;
269 break;
270 default:
271 ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__,
272 ep->nextpid);
273 BUG();
274 }
275
276 ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle);
277 ptd->mps = PTD_MPS(ep->maxpacket)
278 | PTD_SPD(urb->dev->speed == USB_SPEED_LOW)
279 | PTD_EP(ep->epnum);
280 ptd->len = PTD_LEN(len) | PTD_DIR(dir);
281 ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe));
282 if (!ep->active) {
283 ptd->mps |= PTD_LAST_MSK;
284 isp116x->atl_last_dir = dir;
285 }
286 isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen;
287 isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4);
288 }
289 }
290
291 /*
292 Take done or failed requests out of schedule. Give back
293 processed urbs.
294 */
295 static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep,
296 struct urb *urb, int status)
297 __releases(isp116x->lock) __acquires(isp116x->lock)
298 {
299 unsigned i;
300
301 ep->error_count = 0;
302
303 if (usb_pipecontrol(urb->pipe))
304 ep->nextpid = USB_PID_SETUP;
305
306 urb_dbg(urb, "Finish");
307
308 usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb);
309 spin_unlock(&isp116x->lock);
310 usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, status);
311 spin_lock(&isp116x->lock);
312
313 /* take idle endpoints out of the schedule */
314 if (!list_empty(&ep->hep->urb_list))
315 return;
316
317 /* async deschedule */
318 if (!list_empty(&ep->schedule)) {
319 list_del_init(&ep->schedule);
320 return;
321 }
322
323 /* periodic deschedule */
324 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
325 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
326 struct isp116x_ep *temp;
327 struct isp116x_ep **prev = &isp116x->periodic[i];
328
329 while (*prev && ((temp = *prev) != ep))
330 prev = &temp->next;
331 if (*prev)
332 *prev = ep->next;
333 isp116x->load[i] -= ep->load;
334 }
335 ep->branch = PERIODIC_SIZE;
336 isp116x_to_hcd(isp116x)->self.bandwidth_allocated -=
337 ep->load / ep->period;
338
339 /* switch irq type? */
340 if (!--isp116x->periodic_count) {
341 isp116x->irqenb &= ~HCuPINT_SOF;
342 isp116x->irqenb |= HCuPINT_ATL;
343 }
344 }
345
346 /*
347 Analyze transfer results, handle partial transfers and errors
348 */
349 static void postproc_atl_queue(struct isp116x *isp116x)
350 {
351 struct isp116x_ep *ep;
352 struct urb *urb;
353 struct usb_device *udev;
354 struct ptd *ptd;
355 int short_not_ok;
356 int status;
357 u8 cc;
358
359 for (ep = isp116x->atl_active; ep; ep = ep->active) {
360 BUG_ON(list_empty(&ep->hep->urb_list));
361 urb =
362 container_of(ep->hep->urb_list.next, struct urb, urb_list);
363 udev = urb->dev;
364 ptd = &ep->ptd;
365 cc = PTD_GET_CC(ptd);
366 short_not_ok = 1;
367 status = -EINPROGRESS;
368
369 /* Data underrun is special. For allowed underrun
370 we clear the error and continue as normal. For
371 forbidden underrun we finish the DATA stage
372 immediately while for control transfer,
373 we do a STATUS stage. */
374 if (cc == TD_DATAUNDERRUN) {
375 if (!(urb->transfer_flags & URB_SHORT_NOT_OK) ||
376 usb_pipecontrol(urb->pipe)) {
377 DBG("Allowed or control data underrun\n");
378 cc = TD_CC_NOERROR;
379 short_not_ok = 0;
380 } else {
381 ep->error_count = 1;
382 usb_settoggle(udev, ep->epnum,
383 ep->nextpid == USB_PID_OUT,
384 PTD_GET_TOGGLE(ptd));
385 urb->actual_length += PTD_GET_COUNT(ptd);
386 status = cc_to_error[TD_DATAUNDERRUN];
387 goto done;
388 }
389 }
390
391 if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED
392 && (++ep->error_count >= 3 || cc == TD_CC_STALL
393 || cc == TD_DATAOVERRUN)) {
394 status = cc_to_error[cc];
395 if (ep->nextpid == USB_PID_ACK)
396 ep->nextpid = 0;
397 goto done;
398 }
399 /* According to usb spec, zero-length Int transfer signals
400 finishing of the urb. Hey, does this apply only
401 for IN endpoints? */
402 if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) {
403 status = 0;
404 goto done;
405 }
406
407 /* Relax after previously failed, but later succeeded
408 or correctly NAK'ed retransmission attempt */
409 if (ep->error_count
410 && (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED))
411 ep->error_count = 0;
412
413 /* Take into account idiosyncracies of the isp116x chip
414 regarding toggle bit for failed transfers */
415 if (ep->nextpid == USB_PID_OUT)
416 usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd)
417 ^ (ep->error_count > 0));
418 else if (ep->nextpid == USB_PID_IN)
419 usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd)
420 ^ (ep->error_count > 0));
421
422 switch (ep->nextpid) {
423 case USB_PID_IN:
424 case USB_PID_OUT:
425 urb->actual_length += PTD_GET_COUNT(ptd);
426 if (PTD_GET_ACTIVE(ptd)
427 || (cc != TD_CC_NOERROR && cc < 0x0E))
428 break;
429 if (urb->transfer_buffer_length != urb->actual_length) {
430 if (short_not_ok)
431 break;
432 } else {
433 if (urb->transfer_flags & URB_ZERO_PACKET
434 && ep->nextpid == USB_PID_OUT
435 && !(PTD_GET_COUNT(ptd) % ep->maxpacket)) {
436 DBG("Zero packet requested\n");
437 break;
438 }
439 }
440 /* All data for this URB is transferred, let's finish */
441 if (usb_pipecontrol(urb->pipe))
442 ep->nextpid = USB_PID_ACK;
443 else
444 status = 0;
445 break;
446 case USB_PID_SETUP:
447 if (PTD_GET_ACTIVE(ptd)
448 || (cc != TD_CC_NOERROR && cc < 0x0E))
449 break;
450 if (urb->transfer_buffer_length == urb->actual_length)
451 ep->nextpid = USB_PID_ACK;
452 else if (usb_pipeout(urb->pipe)) {
453 usb_settoggle(udev, 0, 1, 1);
454 ep->nextpid = USB_PID_OUT;
455 } else {
456 usb_settoggle(udev, 0, 0, 1);
457 ep->nextpid = USB_PID_IN;
458 }
459 break;
460 case USB_PID_ACK:
461 if (PTD_GET_ACTIVE(ptd)
462 || (cc != TD_CC_NOERROR && cc < 0x0E))
463 break;
464 status = 0;
465 ep->nextpid = 0;
466 break;
467 default:
468 BUG();
469 }
470
471 done:
472 if (status != -EINPROGRESS || urb->unlinked)
473 finish_request(isp116x, ep, urb, status);
474 }
475 }
476
477 /*
478 Scan transfer lists, schedule transfers, send data off
479 to chip.
480 */
481 static void start_atl_transfers(struct isp116x *isp116x)
482 {
483 struct isp116x_ep *last_ep = NULL, *ep;
484 struct urb *urb;
485 u16 load = 0;
486 int len, index, speed, byte_time;
487
488 if (atomic_read(&isp116x->atl_finishing))
489 return;
490
491 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state))
492 return;
493
494 /* FIFO not empty? */
495 if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL)
496 return;
497
498 isp116x->atl_active = NULL;
499 isp116x->atl_buflen = isp116x->atl_bufshrt = 0;
500
501 /* Schedule int transfers */
502 if (isp116x->periodic_count) {
503 isp116x->fmindex = index =
504 (isp116x->fmindex + 1) & (PERIODIC_SIZE - 1);
505 if ((load = isp116x->load[index])) {
506 /* Bring all int transfers for this frame
507 into the active queue */
508 isp116x->atl_active = last_ep =
509 isp116x->periodic[index];
510 while (last_ep->next)
511 last_ep = (last_ep->active = last_ep->next);
512 last_ep->active = NULL;
513 }
514 }
515
516 /* Schedule control/bulk transfers */
517 list_for_each_entry(ep, &isp116x->async, schedule) {
518 urb = container_of(ep->hep->urb_list.next,
519 struct urb, urb_list);
520 speed = urb->dev->speed;
521 byte_time = speed == USB_SPEED_LOW
522 ? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED;
523
524 if (ep->nextpid == USB_PID_SETUP) {
525 len = sizeof(struct usb_ctrlrequest);
526 } else if (ep->nextpid == USB_PID_ACK) {
527 len = 0;
528 } else {
529 /* Find current free length ... */
530 len = (MAX_LOAD_LIMIT - load) / byte_time;
531
532 /* ... then limit it to configured max size ... */
533 len = min(len, speed == USB_SPEED_LOW ?
534 MAX_TRANSFER_SIZE_LOWSPEED :
535 MAX_TRANSFER_SIZE_FULLSPEED);
536
537 /* ... and finally cut to the multiple of MaxPacketSize,
538 or to the real length if there's enough room. */
539 if (len <
540 (urb->transfer_buffer_length -
541 urb->actual_length)) {
542 len -= len % ep->maxpacket;
543 if (!len)
544 continue;
545 } else
546 len = urb->transfer_buffer_length -
547 urb->actual_length;
548 BUG_ON(len < 0);
549 }
550
551 load += len * byte_time;
552 if (load > MAX_LOAD_LIMIT)
553 break;
554
555 ep->active = NULL;
556 ep->length = len;
557 if (last_ep)
558 last_ep->active = ep;
559 else
560 isp116x->atl_active = ep;
561 last_ep = ep;
562 }
563
564 /* Avoid starving of endpoints */
565 if ((&isp116x->async)->next != (&isp116x->async)->prev)
566 list_move(&isp116x->async, (&isp116x->async)->next);
567
568 if (isp116x->atl_active) {
569 preproc_atl_queue(isp116x);
570 pack_fifo(isp116x);
571 }
572 }
573
574 /*
575 Finish the processed transfers
576 */
577 static void finish_atl_transfers(struct isp116x *isp116x)
578 {
579 if (!isp116x->atl_active)
580 return;
581 /* Fifo not ready? */
582 if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE))
583 return;
584
585 atomic_inc(&isp116x->atl_finishing);
586 unpack_fifo(isp116x);
587 postproc_atl_queue(isp116x);
588 atomic_dec(&isp116x->atl_finishing);
589 }
590
591 static irqreturn_t isp116x_irq(struct usb_hcd *hcd)
592 {
593 struct isp116x *isp116x = hcd_to_isp116x(hcd);
594 u16 irqstat;
595 irqreturn_t ret = IRQ_NONE;
596
597 spin_lock(&isp116x->lock);
598 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
599 irqstat = isp116x_read_reg16(isp116x, HCuPINT);
600 isp116x_write_reg16(isp116x, HCuPINT, irqstat);
601
602 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
603 ret = IRQ_HANDLED;
604 finish_atl_transfers(isp116x);
605 }
606
607 if (irqstat & HCuPINT_OPR) {
608 u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT);
609 isp116x_write_reg32(isp116x, HCINTSTAT, intstat);
610 if (intstat & HCINT_UE) {
611 ERR("Unrecoverable error, HC is dead!\n");
612 /* IRQ's are off, we do no DMA,
613 perfectly ready to die ... */
614 hcd->state = HC_STATE_HALT;
615 ret = IRQ_HANDLED;
616 goto done;
617 }
618 if (intstat & HCINT_RHSC)
619 /* When root hub or any of its ports is going
620 to come out of suspend, it may take more
621 than 10ms for status bits to stabilize. */
622 mod_timer(&hcd->rh_timer, jiffies
623 + msecs_to_jiffies(20) + 1);
624 if (intstat & HCINT_RD) {
625 DBG("---- remote wakeup\n");
626 usb_hcd_resume_root_hub(hcd);
627 }
628 irqstat &= ~HCuPINT_OPR;
629 ret = IRQ_HANDLED;
630 }
631
632 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
633 start_atl_transfers(isp116x);
634 }
635
636 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
637 done:
638 spin_unlock(&isp116x->lock);
639 return ret;
640 }
641
642 /*-----------------------------------------------------------------*/
643
644 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
645 * this driver doesn't promise that much since it's got to handle an
646 * IRQ per packet; irq handling latencies also use up that time.
647 */
648
649 /* out of 1000 us */
650 #define MAX_PERIODIC_LOAD 600
651 static int balance(struct isp116x *isp116x, u16 period, u16 load)
652 {
653 int i, branch = -ENOSPC;
654
655 /* search for the least loaded schedule branch of that period
656 which has enough bandwidth left unreserved. */
657 for (i = 0; i < period; i++) {
658 if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) {
659 int j;
660
661 for (j = i; j < PERIODIC_SIZE; j += period) {
662 if ((isp116x->load[j] + load)
663 > MAX_PERIODIC_LOAD)
664 break;
665 }
666 if (j < PERIODIC_SIZE)
667 continue;
668 branch = i;
669 }
670 }
671 return branch;
672 }
673
674 /* NB! ALL the code above this point runs with isp116x->lock
675 held, irqs off
676 */
677
678 /*-----------------------------------------------------------------*/
679
680 static int isp116x_urb_enqueue(struct usb_hcd *hcd,
681 struct urb *urb,
682 gfp_t mem_flags)
683 {
684 struct isp116x *isp116x = hcd_to_isp116x(hcd);
685 struct usb_device *udev = urb->dev;
686 unsigned int pipe = urb->pipe;
687 int is_out = !usb_pipein(pipe);
688 int type = usb_pipetype(pipe);
689 int epnum = usb_pipeendpoint(pipe);
690 struct usb_host_endpoint *hep = urb->ep;
691 struct isp116x_ep *ep = NULL;
692 unsigned long flags;
693 int i;
694 int ret = 0;
695
696 urb_dbg(urb, "Enqueue");
697
698 if (type == PIPE_ISOCHRONOUS) {
699 ERR("Isochronous transfers not supported\n");
700 urb_dbg(urb, "Refused to enqueue");
701 return -ENXIO;
702 }
703 /* avoid all allocations within spinlocks: request or endpoint */
704 if (!hep->hcpriv) {
705 ep = kzalloc(sizeof *ep, mem_flags);
706 if (!ep)
707 return -ENOMEM;
708 }
709
710 spin_lock_irqsave(&isp116x->lock, flags);
711 if (!HC_IS_RUNNING(hcd->state)) {
712 kfree(ep);
713 ret = -ENODEV;
714 goto fail_not_linked;
715 }
716 ret = usb_hcd_link_urb_to_ep(hcd, urb);
717 if (ret) {
718 kfree(ep);
719 goto fail_not_linked;
720 }
721
722 if (hep->hcpriv)
723 ep = hep->hcpriv;
724 else {
725 INIT_LIST_HEAD(&ep->schedule);
726 ep->udev = udev;
727 ep->epnum = epnum;
728 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
729 usb_settoggle(udev, epnum, is_out, 0);
730
731 if (type == PIPE_CONTROL) {
732 ep->nextpid = USB_PID_SETUP;
733 } else if (is_out) {
734 ep->nextpid = USB_PID_OUT;
735 } else {
736 ep->nextpid = USB_PID_IN;
737 }
738
739 if (urb->interval) {
740 /*
741 With INT URBs submitted, the driver works with SOF
742 interrupt enabled and ATL interrupt disabled. After
743 the PTDs are written to fifo ram, the chip starts
744 fifo processing and usb transfers after the next
745 SOF and continues until the transfers are finished
746 (succeeded or failed) or the frame ends. Therefore,
747 the transfers occur only in every second frame,
748 while fifo reading/writing and data processing
749 occur in every other second frame. */
750 if (urb->interval < 2)
751 urb->interval = 2;
752 if (urb->interval > 2 * PERIODIC_SIZE)
753 urb->interval = 2 * PERIODIC_SIZE;
754 ep->period = urb->interval >> 1;
755 ep->branch = PERIODIC_SIZE;
756 ep->load = usb_calc_bus_time(udev->speed,
757 !is_out,
758 (type == PIPE_ISOCHRONOUS),
759 usb_maxpacket(udev, pipe,
760 is_out)) /
761 1000;
762 }
763 hep->hcpriv = ep;
764 ep->hep = hep;
765 }
766
767 /* maybe put endpoint into schedule */
768 switch (type) {
769 case PIPE_CONTROL:
770 case PIPE_BULK:
771 if (list_empty(&ep->schedule))
772 list_add_tail(&ep->schedule, &isp116x->async);
773 break;
774 case PIPE_INTERRUPT:
775 urb->interval = ep->period;
776 ep->length = min_t(u32, ep->maxpacket,
777 urb->transfer_buffer_length);
778
779 /* urb submitted for already existing endpoint */
780 if (ep->branch < PERIODIC_SIZE)
781 break;
782
783 ep->branch = ret = balance(isp116x, ep->period, ep->load);
784 if (ret < 0)
785 goto fail;
786 ret = 0;
787
788 urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1))
789 + ep->branch;
790
791 /* sort each schedule branch by period (slow before fast)
792 to share the faster parts of the tree without needing
793 dummy/placeholder nodes */
794 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
795 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
796 struct isp116x_ep **prev = &isp116x->periodic[i];
797 struct isp116x_ep *here = *prev;
798
799 while (here && ep != here) {
800 if (ep->period > here->period)
801 break;
802 prev = &here->next;
803 here = *prev;
804 }
805 if (ep != here) {
806 ep->next = here;
807 *prev = ep;
808 }
809 isp116x->load[i] += ep->load;
810 }
811 hcd->self.bandwidth_allocated += ep->load / ep->period;
812
813 /* switch over to SOFint */
814 if (!isp116x->periodic_count++) {
815 isp116x->irqenb &= ~HCuPINT_ATL;
816 isp116x->irqenb |= HCuPINT_SOF;
817 isp116x_write_reg16(isp116x, HCuPINTENB,
818 isp116x->irqenb);
819 }
820 }
821
822 urb->hcpriv = hep;
823 start_atl_transfers(isp116x);
824
825 fail:
826 if (ret)
827 usb_hcd_unlink_urb_from_ep(hcd, urb);
828 fail_not_linked:
829 spin_unlock_irqrestore(&isp116x->lock, flags);
830 return ret;
831 }
832
833 /*
834 Dequeue URBs.
835 */
836 static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
837 int status)
838 {
839 struct isp116x *isp116x = hcd_to_isp116x(hcd);
840 struct usb_host_endpoint *hep;
841 struct isp116x_ep *ep, *ep_act;
842 unsigned long flags;
843 int rc;
844
845 spin_lock_irqsave(&isp116x->lock, flags);
846 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
847 if (rc)
848 goto done;
849
850 hep = urb->hcpriv;
851 ep = hep->hcpriv;
852 WARN_ON(hep != ep->hep);
853
854 /* In front of queue? */
855 if (ep->hep->urb_list.next == &urb->urb_list)
856 /* active? */
857 for (ep_act = isp116x->atl_active; ep_act;
858 ep_act = ep_act->active)
859 if (ep_act == ep) {
860 VDBG("dequeue, urb %p active; wait for irq\n",
861 urb);
862 urb = NULL;
863 break;
864 }
865
866 if (urb)
867 finish_request(isp116x, ep, urb, status);
868 done:
869 spin_unlock_irqrestore(&isp116x->lock, flags);
870 return rc;
871 }
872
873 static void isp116x_endpoint_disable(struct usb_hcd *hcd,
874 struct usb_host_endpoint *hep)
875 {
876 int i;
877 struct isp116x_ep *ep = hep->hcpriv;
878
879 if (!ep)
880 return;
881
882 /* assume we'd just wait for the irq */
883 for (i = 0; i < 100 && !list_empty(&hep->urb_list); i++)
884 msleep(3);
885 if (!list_empty(&hep->urb_list))
886 WARNING("ep %p not empty?\n", ep);
887
888 kfree(ep);
889 hep->hcpriv = NULL;
890 }
891
892 static int isp116x_get_frame(struct usb_hcd *hcd)
893 {
894 struct isp116x *isp116x = hcd_to_isp116x(hcd);
895 u32 fmnum;
896 unsigned long flags;
897
898 spin_lock_irqsave(&isp116x->lock, flags);
899 fmnum = isp116x_read_reg32(isp116x, HCFMNUM);
900 spin_unlock_irqrestore(&isp116x->lock, flags);
901 return (int)fmnum;
902 }
903
904 /*
905 Adapted from ohci-hub.c. Currently we don't support autosuspend.
906 */
907 static int isp116x_hub_status_data(struct usb_hcd *hcd, char *buf)
908 {
909 struct isp116x *isp116x = hcd_to_isp116x(hcd);
910 int ports, i, changed = 0;
911 unsigned long flags;
912
913 if (!HC_IS_RUNNING(hcd->state))
914 return -ESHUTDOWN;
915
916 /* Report no status change now, if we are scheduled to be
917 called later */
918 if (timer_pending(&hcd->rh_timer))
919 return 0;
920
921 ports = isp116x->rhdesca & RH_A_NDP;
922 spin_lock_irqsave(&isp116x->lock, flags);
923 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
924 if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC))
925 buf[0] = changed = 1;
926 else
927 buf[0] = 0;
928
929 for (i = 0; i < ports; i++) {
930 u32 status = isp116x_read_reg32(isp116x, i ? HCRHPORT2 : HCRHPORT1);
931
932 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
933 | RH_PS_OCIC | RH_PS_PRSC)) {
934 changed = 1;
935 buf[0] |= 1 << (i + 1);
936 }
937 }
938 spin_unlock_irqrestore(&isp116x->lock, flags);
939 return changed;
940 }
941
942 static void isp116x_hub_descriptor(struct isp116x *isp116x,
943 struct usb_hub_descriptor *desc)
944 {
945 u32 reg = isp116x->rhdesca;
946
947 desc->bDescriptorType = 0x29;
948 desc->bDescLength = 9;
949 desc->bHubContrCurrent = 0;
950 desc->bNbrPorts = (u8) (reg & 0x3);
951 /* Power switching, device type, overcurrent. */
952 desc->wHubCharacteristics = cpu_to_le16((u16) ((reg >> 8) & 0x1f));
953 desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff);
954 /* ports removable, and legacy PortPwrCtrlMask */
955 desc->u.hs.DeviceRemovable[0] = 0;
956 desc->u.hs.DeviceRemovable[1] = ~0;
957 }
958
959 /* Perform reset of a given port.
960 It would be great to just start the reset and let the
961 USB core to clear the reset in due time. However,
962 root hub ports should be reset for at least 50 ms, while
963 our chip stays in reset for about 10 ms. I.e., we must
964 repeatedly reset it ourself here.
965 */
966 static inline void root_port_reset(struct isp116x *isp116x, unsigned port)
967 {
968 u32 tmp;
969 unsigned long flags, t;
970
971 /* Root hub reset should be 50 ms, but some devices
972 want it even longer. */
973 t = jiffies + msecs_to_jiffies(100);
974
975 while (time_before(jiffies, t)) {
976 spin_lock_irqsave(&isp116x->lock, flags);
977 /* spin until any current reset finishes */
978 for (;;) {
979 tmp = isp116x_read_reg32(isp116x, port ?
980 HCRHPORT2 : HCRHPORT1);
981 if (!(tmp & RH_PS_PRS))
982 break;
983 udelay(500);
984 }
985 /* Don't reset a disconnected port */
986 if (!(tmp & RH_PS_CCS)) {
987 spin_unlock_irqrestore(&isp116x->lock, flags);
988 break;
989 }
990 /* Reset lasts 10ms (claims datasheet) */
991 isp116x_write_reg32(isp116x, port ? HCRHPORT2 :
992 HCRHPORT1, (RH_PS_PRS));
993 spin_unlock_irqrestore(&isp116x->lock, flags);
994 msleep(10);
995 }
996 }
997
998 /* Adapted from ohci-hub.c */
999 static int isp116x_hub_control(struct usb_hcd *hcd,
1000 u16 typeReq,
1001 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1002 {
1003 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1004 int ret = 0;
1005 unsigned long flags;
1006 int ports = isp116x->rhdesca & RH_A_NDP;
1007 u32 tmp = 0;
1008
1009 switch (typeReq) {
1010 case ClearHubFeature:
1011 DBG("ClearHubFeature: ");
1012 switch (wValue) {
1013 case C_HUB_OVER_CURRENT:
1014 DBG("C_HUB_OVER_CURRENT\n");
1015 spin_lock_irqsave(&isp116x->lock, flags);
1016 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
1017 spin_unlock_irqrestore(&isp116x->lock, flags);
1018 case C_HUB_LOCAL_POWER:
1019 DBG("C_HUB_LOCAL_POWER\n");
1020 break;
1021 default:
1022 goto error;
1023 }
1024 break;
1025 case SetHubFeature:
1026 DBG("SetHubFeature: ");
1027 switch (wValue) {
1028 case C_HUB_OVER_CURRENT:
1029 case C_HUB_LOCAL_POWER:
1030 DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
1031 break;
1032 default:
1033 goto error;
1034 }
1035 break;
1036 case GetHubDescriptor:
1037 DBG("GetHubDescriptor\n");
1038 isp116x_hub_descriptor(isp116x,
1039 (struct usb_hub_descriptor *)buf);
1040 break;
1041 case GetHubStatus:
1042 DBG("GetHubStatus\n");
1043 *(__le32 *) buf = 0;
1044 break;
1045 case GetPortStatus:
1046 DBG("GetPortStatus\n");
1047 if (!wIndex || wIndex > ports)
1048 goto error;
1049 spin_lock_irqsave(&isp116x->lock, flags);
1050 tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
1051 spin_unlock_irqrestore(&isp116x->lock, flags);
1052 *(__le32 *) buf = cpu_to_le32(tmp);
1053 DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp);
1054 break;
1055 case ClearPortFeature:
1056 DBG("ClearPortFeature: ");
1057 if (!wIndex || wIndex > ports)
1058 goto error;
1059 wIndex--;
1060
1061 switch (wValue) {
1062 case USB_PORT_FEAT_ENABLE:
1063 DBG("USB_PORT_FEAT_ENABLE\n");
1064 tmp = RH_PS_CCS;
1065 break;
1066 case USB_PORT_FEAT_C_ENABLE:
1067 DBG("USB_PORT_FEAT_C_ENABLE\n");
1068 tmp = RH_PS_PESC;
1069 break;
1070 case USB_PORT_FEAT_SUSPEND:
1071 DBG("USB_PORT_FEAT_SUSPEND\n");
1072 tmp = RH_PS_POCI;
1073 break;
1074 case USB_PORT_FEAT_C_SUSPEND:
1075 DBG("USB_PORT_FEAT_C_SUSPEND\n");
1076 tmp = RH_PS_PSSC;
1077 break;
1078 case USB_PORT_FEAT_POWER:
1079 DBG("USB_PORT_FEAT_POWER\n");
1080 tmp = RH_PS_LSDA;
1081 break;
1082 case USB_PORT_FEAT_C_CONNECTION:
1083 DBG("USB_PORT_FEAT_C_CONNECTION\n");
1084 tmp = RH_PS_CSC;
1085 break;
1086 case USB_PORT_FEAT_C_OVER_CURRENT:
1087 DBG("USB_PORT_FEAT_C_OVER_CURRENT\n");
1088 tmp = RH_PS_OCIC;
1089 break;
1090 case USB_PORT_FEAT_C_RESET:
1091 DBG("USB_PORT_FEAT_C_RESET\n");
1092 tmp = RH_PS_PRSC;
1093 break;
1094 default:
1095 goto error;
1096 }
1097 spin_lock_irqsave(&isp116x->lock, flags);
1098 isp116x_write_reg32(isp116x, wIndex
1099 ? HCRHPORT2 : HCRHPORT1, tmp);
1100 spin_unlock_irqrestore(&isp116x->lock, flags);
1101 break;
1102 case SetPortFeature:
1103 DBG("SetPortFeature: ");
1104 if (!wIndex || wIndex > ports)
1105 goto error;
1106 wIndex--;
1107 switch (wValue) {
1108 case USB_PORT_FEAT_SUSPEND:
1109 DBG("USB_PORT_FEAT_SUSPEND\n");
1110 spin_lock_irqsave(&isp116x->lock, flags);
1111 isp116x_write_reg32(isp116x, wIndex
1112 ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS);
1113 spin_unlock_irqrestore(&isp116x->lock, flags);
1114 break;
1115 case USB_PORT_FEAT_POWER:
1116 DBG("USB_PORT_FEAT_POWER\n");
1117 spin_lock_irqsave(&isp116x->lock, flags);
1118 isp116x_write_reg32(isp116x, wIndex
1119 ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS);
1120 spin_unlock_irqrestore(&isp116x->lock, flags);
1121 break;
1122 case USB_PORT_FEAT_RESET:
1123 DBG("USB_PORT_FEAT_RESET\n");
1124 root_port_reset(isp116x, wIndex);
1125 break;
1126 default:
1127 goto error;
1128 }
1129 break;
1130
1131 default:
1132 error:
1133 /* "protocol stall" on error */
1134 DBG("PROTOCOL STALL\n");
1135 ret = -EPIPE;
1136 }
1137 return ret;
1138 }
1139
1140 /*-----------------------------------------------------------------*/
1141
1142 #ifdef CONFIG_DEBUG_FS
1143
1144 static void dump_irq(struct seq_file *s, char *label, u16 mask)
1145 {
1146 seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask,
1147 mask & HCuPINT_CLKRDY ? " clkrdy" : "",
1148 mask & HCuPINT_SUSP ? " susp" : "",
1149 mask & HCuPINT_OPR ? " opr" : "",
1150 mask & HCuPINT_AIIEOT ? " eot" : "",
1151 mask & HCuPINT_ATL ? " atl" : "",
1152 mask & HCuPINT_SOF ? " sof" : "");
1153 }
1154
1155 static void dump_int(struct seq_file *s, char *label, u32 mask)
1156 {
1157 seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask,
1158 mask & HCINT_MIE ? " MIE" : "",
1159 mask & HCINT_RHSC ? " rhsc" : "",
1160 mask & HCINT_FNO ? " fno" : "",
1161 mask & HCINT_UE ? " ue" : "",
1162 mask & HCINT_RD ? " rd" : "",
1163 mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : "");
1164 }
1165
1166 static int isp116x_show_dbg(struct seq_file *s, void *unused)
1167 {
1168 struct isp116x *isp116x = s->private;
1169
1170 seq_printf(s, "%s\n%s version %s\n",
1171 isp116x_to_hcd(isp116x)->product_desc, hcd_name,
1172 DRIVER_VERSION);
1173
1174 if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) {
1175 seq_printf(s, "HCD is suspended\n");
1176 return 0;
1177 }
1178 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) {
1179 seq_printf(s, "HCD not running\n");
1180 return 0;
1181 }
1182
1183 spin_lock_irq(&isp116x->lock);
1184 dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB));
1185 dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT));
1186 dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB));
1187 dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT));
1188 isp116x_show_regs_seq(isp116x, s);
1189 spin_unlock_irq(&isp116x->lock);
1190 seq_printf(s, "\n");
1191
1192 return 0;
1193 }
1194
1195 static int isp116x_open_seq(struct inode *inode, struct file *file)
1196 {
1197 return single_open(file, isp116x_show_dbg, inode->i_private);
1198 }
1199
1200 static const struct file_operations isp116x_debug_fops = {
1201 .open = isp116x_open_seq,
1202 .read = seq_read,
1203 .llseek = seq_lseek,
1204 .release = single_release,
1205 };
1206
1207 static int create_debug_file(struct isp116x *isp116x)
1208 {
1209 isp116x->dentry = debugfs_create_file(hcd_name,
1210 S_IRUGO, NULL, isp116x,
1211 &isp116x_debug_fops);
1212 if (!isp116x->dentry)
1213 return -ENOMEM;
1214 return 0;
1215 }
1216
1217 static void remove_debug_file(struct isp116x *isp116x)
1218 {
1219 debugfs_remove(isp116x->dentry);
1220 }
1221
1222 #else
1223
1224 #define create_debug_file(d) 0
1225 #define remove_debug_file(d) do{}while(0)
1226
1227 #endif /* CONFIG_DEBUG_FS */
1228
1229 /*-----------------------------------------------------------------*/
1230
1231 /*
1232 Software reset - can be called from any contect.
1233 */
1234 static int isp116x_sw_reset(struct isp116x *isp116x)
1235 {
1236 int retries = 15;
1237 unsigned long flags;
1238 int ret = 0;
1239
1240 spin_lock_irqsave(&isp116x->lock, flags);
1241 isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
1242 isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
1243 while (--retries) {
1244 /* It usually resets within 1 ms */
1245 mdelay(1);
1246 if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
1247 break;
1248 }
1249 if (!retries) {
1250 ERR("Software reset timeout\n");
1251 ret = -ETIME;
1252 }
1253 spin_unlock_irqrestore(&isp116x->lock, flags);
1254 return ret;
1255 }
1256
1257 static int isp116x_reset(struct usb_hcd *hcd)
1258 {
1259 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1260 unsigned long t;
1261 u16 clkrdy = 0;
1262 int ret, timeout = 15 /* ms */ ;
1263
1264 ret = isp116x_sw_reset(isp116x);
1265 if (ret)
1266 return ret;
1267
1268 t = jiffies + msecs_to_jiffies(timeout);
1269 while (time_before_eq(jiffies, t)) {
1270 msleep(4);
1271 spin_lock_irq(&isp116x->lock);
1272 clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
1273 spin_unlock_irq(&isp116x->lock);
1274 if (clkrdy)
1275 break;
1276 }
1277 if (!clkrdy) {
1278 ERR("Clock not ready after %dms\n", timeout);
1279 /* After sw_reset the clock won't report to be ready, if
1280 H_WAKEUP pin is high. */
1281 ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
1282 ret = -ENODEV;
1283 }
1284 return ret;
1285 }
1286
1287 static void isp116x_stop(struct usb_hcd *hcd)
1288 {
1289 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1290 unsigned long flags;
1291 u32 val;
1292
1293 spin_lock_irqsave(&isp116x->lock, flags);
1294 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1295
1296 /* Switch off ports' power, some devices don't come up
1297 after next 'insmod' without this */
1298 val = isp116x_read_reg32(isp116x, HCRHDESCA);
1299 val &= ~(RH_A_NPS | RH_A_PSM);
1300 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1301 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
1302 spin_unlock_irqrestore(&isp116x->lock, flags);
1303
1304 isp116x_sw_reset(isp116x);
1305 }
1306
1307 /*
1308 Configure the chip. The chip must be successfully reset by now.
1309 */
1310 static int isp116x_start(struct usb_hcd *hcd)
1311 {
1312 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1313 struct isp116x_platform_data *board = isp116x->board;
1314 u32 val;
1315 unsigned long flags;
1316
1317 spin_lock_irqsave(&isp116x->lock, flags);
1318
1319 /* clear interrupt status and disable all interrupt sources */
1320 isp116x_write_reg16(isp116x, HCuPINT, 0xff);
1321 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1322
1323 val = isp116x_read_reg16(isp116x, HCCHIPID);
1324 if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
1325 ERR("Invalid chip ID %04x\n", val);
1326 spin_unlock_irqrestore(&isp116x->lock, flags);
1327 return -ENODEV;
1328 }
1329
1330 /* To be removed in future */
1331 hcd->uses_new_polling = 1;
1332
1333 isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
1334 isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);
1335
1336 /* ----- HW conf */
1337 val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
1338 if (board->sel15Kres)
1339 val |= HCHWCFG_15KRSEL;
1340 /* Remote wakeup won't work without working clock */
1341 if (board->remote_wakeup_enable)
1342 val |= HCHWCFG_CLKNOTSTOP;
1343 if (board->oc_enable)
1344 val |= HCHWCFG_ANALOG_OC;
1345 if (board->int_act_high)
1346 val |= HCHWCFG_INT_POL;
1347 if (board->int_edge_triggered)
1348 val |= HCHWCFG_INT_TRIGGER;
1349 isp116x_write_reg16(isp116x, HCHWCFG, val);
1350
1351 /* ----- Root hub conf */
1352 val = (25 << 24) & RH_A_POTPGT;
1353 /* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
1354 be always set. Yet, instead, we request individual port
1355 power switching. */
1356 val |= RH_A_PSM;
1357 /* Report overcurrent per port */
1358 val |= RH_A_OCPM;
1359 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1360 isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);
1361
1362 val = RH_B_PPCM;
1363 isp116x_write_reg32(isp116x, HCRHDESCB, val);
1364 isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);
1365
1366 val = 0;
1367 if (board->remote_wakeup_enable) {
1368 if (!device_can_wakeup(hcd->self.controller))
1369 device_init_wakeup(hcd->self.controller, 1);
1370 val |= RH_HS_DRWE;
1371 }
1372 isp116x_write_reg32(isp116x, HCRHSTATUS, val);
1373 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
1374
1375 isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);
1376
1377 hcd->state = HC_STATE_RUNNING;
1378
1379 /* Set up interrupts */
1380 isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE;
1381 if (board->remote_wakeup_enable)
1382 isp116x->intenb |= HCINT_RD;
1383 isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */
1384 isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb);
1385 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
1386
1387 /* Go operational */
1388 val = HCCONTROL_USB_OPER;
1389 if (board->remote_wakeup_enable)
1390 val |= HCCONTROL_RWE;
1391 isp116x_write_reg32(isp116x, HCCONTROL, val);
1392
1393 /* Disable ports to avoid race in device enumeration */
1394 isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
1395 isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);
1396
1397 isp116x_show_regs_log(isp116x);
1398 spin_unlock_irqrestore(&isp116x->lock, flags);
1399 return 0;
1400 }
1401
1402 #ifdef CONFIG_PM
1403
1404 static int isp116x_bus_suspend(struct usb_hcd *hcd)
1405 {
1406 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1407 unsigned long flags;
1408 u32 val;
1409 int ret = 0;
1410
1411 spin_lock_irqsave(&isp116x->lock, flags);
1412 val = isp116x_read_reg32(isp116x, HCCONTROL);
1413
1414 switch (val & HCCONTROL_HCFS) {
1415 case HCCONTROL_USB_OPER:
1416 spin_unlock_irqrestore(&isp116x->lock, flags);
1417 val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
1418 val |= HCCONTROL_USB_SUSPEND;
1419 if (hcd->self.root_hub->do_remote_wakeup)
1420 val |= HCCONTROL_RWE;
1421 /* Wait for usb transfers to finish */
1422 msleep(2);
1423 spin_lock_irqsave(&isp116x->lock, flags);
1424 isp116x_write_reg32(isp116x, HCCONTROL, val);
1425 spin_unlock_irqrestore(&isp116x->lock, flags);
1426 /* Wait for devices to suspend */
1427 msleep(5);
1428 break;
1429 case HCCONTROL_USB_RESUME:
1430 isp116x_write_reg32(isp116x, HCCONTROL,
1431 (val & ~HCCONTROL_HCFS) |
1432 HCCONTROL_USB_RESET);
1433 case HCCONTROL_USB_RESET:
1434 ret = -EBUSY;
1435 default: /* HCCONTROL_USB_SUSPEND */
1436 spin_unlock_irqrestore(&isp116x->lock, flags);
1437 break;
1438 }
1439
1440 return ret;
1441 }
1442
1443 static int isp116x_bus_resume(struct usb_hcd *hcd)
1444 {
1445 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1446 u32 val;
1447
1448 msleep(5);
1449 spin_lock_irq(&isp116x->lock);
1450
1451 val = isp116x_read_reg32(isp116x, HCCONTROL);
1452 switch (val & HCCONTROL_HCFS) {
1453 case HCCONTROL_USB_SUSPEND:
1454 val &= ~HCCONTROL_HCFS;
1455 val |= HCCONTROL_USB_RESUME;
1456 isp116x_write_reg32(isp116x, HCCONTROL, val);
1457 case HCCONTROL_USB_RESUME:
1458 break;
1459 case HCCONTROL_USB_OPER:
1460 spin_unlock_irq(&isp116x->lock);
1461 return 0;
1462 default:
1463 /* HCCONTROL_USB_RESET: this may happen, when during
1464 suspension the HC lost power. Reinitialize completely */
1465 spin_unlock_irq(&isp116x->lock);
1466 DBG("Chip has been reset while suspended. Reinit from scratch.\n");
1467 isp116x_reset(hcd);
1468 isp116x_start(hcd);
1469 isp116x_hub_control(hcd, SetPortFeature,
1470 USB_PORT_FEAT_POWER, 1, NULL, 0);
1471 if ((isp116x->rhdesca & RH_A_NDP) == 2)
1472 isp116x_hub_control(hcd, SetPortFeature,
1473 USB_PORT_FEAT_POWER, 2, NULL, 0);
1474 return 0;
1475 }
1476
1477 val = isp116x->rhdesca & RH_A_NDP;
1478 while (val--) {
1479 u32 stat =
1480 isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1);
1481 /* force global, not selective, resume */
1482 if (!(stat & RH_PS_PSS))
1483 continue;
1484 DBG("%s: Resuming port %d\n", __func__, val);
1485 isp116x_write_reg32(isp116x, RH_PS_POCI, val
1486 ? HCRHPORT2 : HCRHPORT1);
1487 }
1488 spin_unlock_irq(&isp116x->lock);
1489
1490 hcd->state = HC_STATE_RESUMING;
1491 msleep(20);
1492
1493 /* Go operational */
1494 spin_lock_irq(&isp116x->lock);
1495 val = isp116x_read_reg32(isp116x, HCCONTROL);
1496 isp116x_write_reg32(isp116x, HCCONTROL,
1497 (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER);
1498 spin_unlock_irq(&isp116x->lock);
1499 hcd->state = HC_STATE_RUNNING;
1500
1501 return 0;
1502 }
1503
1504 #else
1505
1506 #define isp116x_bus_suspend NULL
1507 #define isp116x_bus_resume NULL
1508
1509 #endif
1510
1511 static struct hc_driver isp116x_hc_driver = {
1512 .description = hcd_name,
1513 .product_desc = "ISP116x Host Controller",
1514 .hcd_priv_size = sizeof(struct isp116x),
1515
1516 .irq = isp116x_irq,
1517 .flags = HCD_USB11,
1518
1519 .reset = isp116x_reset,
1520 .start = isp116x_start,
1521 .stop = isp116x_stop,
1522
1523 .urb_enqueue = isp116x_urb_enqueue,
1524 .urb_dequeue = isp116x_urb_dequeue,
1525 .endpoint_disable = isp116x_endpoint_disable,
1526
1527 .get_frame_number = isp116x_get_frame,
1528
1529 .hub_status_data = isp116x_hub_status_data,
1530 .hub_control = isp116x_hub_control,
1531 .bus_suspend = isp116x_bus_suspend,
1532 .bus_resume = isp116x_bus_resume,
1533 };
1534
1535 /*----------------------------------------------------------------*/
1536
1537 static int isp116x_remove(struct platform_device *pdev)
1538 {
1539 struct usb_hcd *hcd = platform_get_drvdata(pdev);
1540 struct isp116x *isp116x;
1541 struct resource *res;
1542
1543 if (!hcd)
1544 return 0;
1545 isp116x = hcd_to_isp116x(hcd);
1546 remove_debug_file(isp116x);
1547 usb_remove_hcd(hcd);
1548
1549 iounmap(isp116x->data_reg);
1550 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1551 release_mem_region(res->start, 2);
1552 iounmap(isp116x->addr_reg);
1553 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1554 release_mem_region(res->start, 2);
1555
1556 usb_put_hcd(hcd);
1557 return 0;
1558 }
1559
1560 static int __devinit isp116x_probe(struct platform_device *pdev)
1561 {
1562 struct usb_hcd *hcd;
1563 struct isp116x *isp116x;
1564 struct resource *addr, *data, *ires;
1565 void __iomem *addr_reg;
1566 void __iomem *data_reg;
1567 int irq;
1568 int ret = 0;
1569 unsigned long irqflags;
1570
1571 if (pdev->num_resources < 3) {
1572 ret = -ENODEV;
1573 goto err1;
1574 }
1575
1576 data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1577 addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1578 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1579
1580 if (!addr || !data || !ires) {
1581 ret = -ENODEV;
1582 goto err1;
1583 }
1584
1585 irq = ires->start;
1586 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1587
1588 if (pdev->dev.dma_mask) {
1589 DBG("DMA not supported\n");
1590 ret = -EINVAL;
1591 goto err1;
1592 }
1593
1594 if (!request_mem_region(addr->start, 2, hcd_name)) {
1595 ret = -EBUSY;
1596 goto err1;
1597 }
1598 addr_reg = ioremap(addr->start, resource_size(addr));
1599 if (addr_reg == NULL) {
1600 ret = -ENOMEM;
1601 goto err2;
1602 }
1603 if (!request_mem_region(data->start, 2, hcd_name)) {
1604 ret = -EBUSY;
1605 goto err3;
1606 }
1607 data_reg = ioremap(data->start, resource_size(data));
1608 if (data_reg == NULL) {
1609 ret = -ENOMEM;
1610 goto err4;
1611 }
1612
1613 /* allocate and initialize hcd */
1614 hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev));
1615 if (!hcd) {
1616 ret = -ENOMEM;
1617 goto err5;
1618 }
1619 /* this rsrc_start is bogus */
1620 hcd->rsrc_start = addr->start;
1621 isp116x = hcd_to_isp116x(hcd);
1622 isp116x->data_reg = data_reg;
1623 isp116x->addr_reg = addr_reg;
1624 spin_lock_init(&isp116x->lock);
1625 INIT_LIST_HEAD(&isp116x->async);
1626 isp116x->board = pdev->dev.platform_data;
1627
1628 if (!isp116x->board) {
1629 ERR("Platform data structure not initialized\n");
1630 ret = -ENODEV;
1631 goto err6;
1632 }
1633 if (isp116x_check_platform_delay(isp116x)) {
1634 ERR("USE_PLATFORM_DELAY defined, but delay function not "
1635 "implemented.\n");
1636 ERR("See comments in drivers/usb/host/isp116x-hcd.c\n");
1637 ret = -ENODEV;
1638 goto err6;
1639 }
1640
1641 ret = usb_add_hcd(hcd, irq, irqflags | IRQF_DISABLED);
1642 if (ret)
1643 goto err6;
1644
1645 ret = create_debug_file(isp116x);
1646 if (ret) {
1647 ERR("Couldn't create debugfs entry\n");
1648 goto err7;
1649 }
1650
1651 return 0;
1652
1653 err7:
1654 usb_remove_hcd(hcd);
1655 err6:
1656 usb_put_hcd(hcd);
1657 err5:
1658 iounmap(data_reg);
1659 err4:
1660 release_mem_region(data->start, 2);
1661 err3:
1662 iounmap(addr_reg);
1663 err2:
1664 release_mem_region(addr->start, 2);
1665 err1:
1666 ERR("init error, %d\n", ret);
1667 return ret;
1668 }
1669
1670 #ifdef CONFIG_PM
1671 /*
1672 Suspend of platform device
1673 */
1674 static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
1675 {
1676 VDBG("%s: state %x\n", __func__, state.event);
1677 return 0;
1678 }
1679
1680 /*
1681 Resume platform device
1682 */
1683 static int isp116x_resume(struct platform_device *dev)
1684 {
1685 VDBG("%s\n", __func__);
1686 return 0;
1687 }
1688
1689 #else
1690
1691 #define isp116x_suspend NULL
1692 #define isp116x_resume NULL
1693
1694 #endif
1695
1696 /* work with hotplug and coldplug */
1697 MODULE_ALIAS("platform:isp116x-hcd");
1698
1699 static struct platform_driver isp116x_driver = {
1700 .probe = isp116x_probe,
1701 .remove = isp116x_remove,
1702 .suspend = isp116x_suspend,
1703 .resume = isp116x_resume,
1704 .driver = {
1705 .name = (char *)hcd_name,
1706 .owner = THIS_MODULE,
1707 },
1708 };
1709
1710 /*-----------------------------------------------------------------*/
1711
1712 static int __init isp116x_init(void)
1713 {
1714 if (usb_disabled())
1715 return -ENODEV;
1716
1717 INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1718 return platform_driver_register(&isp116x_driver);
1719 }
1720
1721 module_init(isp116x_init);
1722
1723 static void __exit isp116x_cleanup(void)
1724 {
1725 platform_driver_unregister(&isp116x_driver);
1726 }
1727
1728 module_exit(isp116x_cleanup);
Linux kernel - Deliverables
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