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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ISP116x HCD (Host Controller Driver) for USB.
4 *
5 * Derived from the SL811 HCD, rewritten for ISP116x.
6 * Copyright (C) 2005 Olav Kongas <ok@artecdesign.ee>
7 *
8 * Portions:
9 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
10 * Copyright (C) 2004 David Brownell
11 *
12 * Periodic scheduling is based on Roman's OHCI code
13 * Copyright (C) 1999 Roman Weissgaerber
14 *
15 */
16
17/*
18 * The driver basically works. A number of people have used it with a range
19 * of devices.
20 *
21 * The driver passes all usbtests 1-14.
22 *
23 * Suspending/resuming of root hub via sysfs works. Remote wakeup works too.
24 * And suspending/resuming of platform device works too. Suspend/resume
25 * via HCD operations vector is not implemented.
26 *
27 * Iso transfer support is not implemented. Adding this would include
28 * implementing recovery from the failure to service the processed ITL
29 * fifo ram in time, which will involve chip reset.
30 *
31 * TODO:
32 + More testing of suspend/resume.
33*/
34
35/*
36 ISP116x chips require certain delays between accesses to its
37 registers. The following timing options exist.
38
39 1. Configure your memory controller (the best)
40 2. Implement platform-specific delay function possibly
41 combined with configuring the memory controller; see
42 include/linux/usb-isp116x.h for more info. Some broken
43 memory controllers line LH7A400 SMC need this. Also,
44 uncomment for that to work the following
45 USE_PLATFORM_DELAY macro.
46 3. Use ndelay (easiest, poorest). For that, uncomment
47 the following USE_NDELAY macro.
48*/
49#define USE_PLATFORM_DELAY
50//#define USE_NDELAY
51
52//#define DEBUG
53//#define VERBOSE
54/* Transfer descriptors. See dump_ptd() for printout format */
55//#define PTD_TRACE
56/* enqueuing/finishing log of urbs */
57//#define URB_TRACE
58
59#include <linux/module.h>
60#include <linux/delay.h>
61#include <linux/debugfs.h>
62#include <linux/seq_file.h>
63#include <linux/errno.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/byteorder.h>
74
75#include "isp116x.h"
76
77#define DRIVER_VERSION "03 Nov 2005"
78#define DRIVER_DESC "ISP116x USB Host Controller Driver"
79
80MODULE_DESCRIPTION(DRIVER_DESC);
81MODULE_LICENSE("GPL");
82
83static const char hcd_name[] = "isp116x-hcd";
84
85/*-----------------------------------------------------------------*/
86
87/*
88 Write len bytes to fifo, pad till 32-bit boundary
89 */
90static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len)
91{
92 u8 *dp = (u8 *) buf;
93 u16 *dp2 = (u16 *) buf;
94 u16 w;
95 int quot = len % 4;
96
97 /* buffer is already in 'usb data order', which is LE. */
98 /* When reading buffer as u16, we have to take care byte order */
99 /* doesn't get mixed up */
100
101 if ((unsigned long)dp2 & 1) {
102 /* not aligned */
103 for (; len > 1; len -= 2) {
104 w = *dp++;
105 w |= *dp++ << 8;
106 isp116x_raw_write_data16(isp116x, w);
107 }
108 if (len)
109 isp116x_write_data16(isp116x, (u16) * dp);
110 } else {
111 /* aligned */
112 for (; len > 1; len -= 2) {
113 /* Keep byte order ! */
114 isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++));
115 }
116
117 if (len)
118 isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2));
119 }
120 if (quot == 1 || quot == 2)
121 isp116x_raw_write_data16(isp116x, 0);
122}
123
124/*
125 Read len bytes from fifo and then read till 32-bit boundary.
126 */
127static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len)
128{
129 u8 *dp = (u8 *) buf;
130 u16 *dp2 = (u16 *) buf;
131 u16 w;
132 int quot = len % 4;
133
134 /* buffer is already in 'usb data order', which is LE. */
135 /* When reading buffer as u16, we have to take care byte order */
136 /* doesn't get mixed up */
137
138 if ((unsigned long)dp2 & 1) {
139 /* not aligned */
140 for (; len > 1; len -= 2) {
141 w = isp116x_raw_read_data16(isp116x);
142 *dp++ = w & 0xff;
143 *dp++ = (w >> 8) & 0xff;
144 }
145
146 if (len)
147 *dp = 0xff & isp116x_read_data16(isp116x);
148 } else {
149 /* aligned */
150 for (; len > 1; len -= 2) {
151 /* Keep byte order! */
152 *dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x));
153 }
154
155 if (len)
156 *(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x);
157 }
158 if (quot == 1 || quot == 2)
159 isp116x_raw_read_data16(isp116x);
160}
161
162/*
163 Write ptd's and data for scheduled transfers into
164 the fifo ram. Fifo must be empty and ready.
165*/
166static void pack_fifo(struct isp116x *isp116x)
167{
168 struct isp116x_ep *ep;
169 struct ptd *ptd;
170 int buflen = isp116x->atl_last_dir == PTD_DIR_IN
171 ? isp116x->atl_bufshrt : isp116x->atl_buflen;
172
173 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
174 isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
175 isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET);
176 for (ep = isp116x->atl_active; ep; ep = ep->active) {
177 ptd = &ep->ptd;
178 dump_ptd(ptd);
179 dump_ptd_out_data(ptd, ep->data);
180 isp116x_write_data16(isp116x, ptd->count);
181 isp116x_write_data16(isp116x, ptd->mps);
182 isp116x_write_data16(isp116x, ptd->len);
183 isp116x_write_data16(isp116x, ptd->faddr);
184 buflen -= sizeof(struct ptd);
185 /* Skip writing data for last IN PTD */
186 if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) {
187 write_ptddata_to_fifo(isp116x, ep->data, ep->length);
188 buflen -= ALIGN(ep->length, 4);
189 }
190 }
191 BUG_ON(buflen);
192}
193
194/*
195 Read the processed ptd's and data from fifo ram back to
196 URBs' buffers. Fifo must be full and done
197*/
198static void unpack_fifo(struct isp116x *isp116x)
199{
200 struct isp116x_ep *ep;
201 struct ptd *ptd;
202 int buflen = isp116x->atl_last_dir == PTD_DIR_IN
203 ? isp116x->atl_buflen : isp116x->atl_bufshrt;
204
205 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
206 isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
207 isp116x_write_addr(isp116x, HCATLPORT);
208 for (ep = isp116x->atl_active; ep; ep = ep->active) {
209 ptd = &ep->ptd;
210 ptd->count = isp116x_read_data16(isp116x);
211 ptd->mps = isp116x_read_data16(isp116x);
212 ptd->len = isp116x_read_data16(isp116x);
213 ptd->faddr = isp116x_read_data16(isp116x);
214 buflen -= sizeof(struct ptd);
215 /* Skip reading data for last Setup or Out PTD */
216 if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) {
217 read_ptddata_from_fifo(isp116x, ep->data, ep->length);
218 buflen -= ALIGN(ep->length, 4);
219 }
220 dump_ptd(ptd);
221 dump_ptd_in_data(ptd, ep->data);
222 }
223 BUG_ON(buflen);
224}
225
226/*---------------------------------------------------------------*/
227
228/*
229 Set up PTD's.
230*/
231static void preproc_atl_queue(struct isp116x *isp116x)
232{
233 struct isp116x_ep *ep;
234 struct urb *urb;
235 struct ptd *ptd;
236 u16 len;
237
238 for (ep = isp116x->atl_active; ep; ep = ep->active) {
239 u16 toggle = 0, dir = PTD_DIR_SETUP;
240
241 BUG_ON(list_empty(&ep->hep->urb_list));
242 urb = container_of(ep->hep->urb_list.next,
243 struct urb, urb_list);
244 ptd = &ep->ptd;
245 len = ep->length;
246 ep->data = (unsigned char *)urb->transfer_buffer
247 + urb->actual_length;
248
249 switch (ep->nextpid) {
250 case USB_PID_IN:
251 toggle = usb_gettoggle(urb->dev, ep->epnum, 0);
252 dir = PTD_DIR_IN;
253 break;
254 case USB_PID_OUT:
255 toggle = usb_gettoggle(urb->dev, ep->epnum, 1);
256 dir = PTD_DIR_OUT;
257 break;
258 case USB_PID_SETUP:
259 len = sizeof(struct usb_ctrlrequest);
260 ep->data = urb->setup_packet;
261 break;
262 case USB_PID_ACK:
263 toggle = 1;
264 len = 0;
265 dir = (urb->transfer_buffer_length
266 && usb_pipein(urb->pipe))
267 ? PTD_DIR_OUT : PTD_DIR_IN;
268 break;
269 default:
270 ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__,
271 ep->nextpid);
272 BUG();
273 }
274
275 ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle);
276 ptd->mps = PTD_MPS(ep->maxpacket)
277 | PTD_SPD(urb->dev->speed == USB_SPEED_LOW)
278 | PTD_EP(ep->epnum);
279 ptd->len = PTD_LEN(len) | PTD_DIR(dir);
280 ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe));
281 if (!ep->active) {
282 ptd->mps |= PTD_LAST_MSK;
283 isp116x->atl_last_dir = dir;
284 }
285 isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen;
286 isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4);
287 }
288}
289
290/*
291 Take done or failed requests out of schedule. Give back
292 processed urbs.
293*/
294static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep,
295 struct urb *urb, int status)
296__releases(isp116x->lock) __acquires(isp116x->lock)
297{
298 unsigned i;
299
300 ep->error_count = 0;
301
302 if (usb_pipecontrol(urb->pipe))
303 ep->nextpid = USB_PID_SETUP;
304
305 urb_dbg(urb, "Finish");
306
307 usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb);
308 spin_unlock(&isp116x->lock);
309 usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, status);
310 spin_lock(&isp116x->lock);
311
312 /* take idle endpoints out of the schedule */
313 if (!list_empty(&ep->hep->urb_list))
314 return;
315
316 /* async deschedule */
317 if (!list_empty(&ep->schedule)) {
318 list_del_init(&ep->schedule);
319 return;
320 }
321
322 /* periodic deschedule */
323 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
324 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
325 struct isp116x_ep *temp;
326 struct isp116x_ep **prev = &isp116x->periodic[i];
327
328 while (*prev && ((temp = *prev) != ep))
329 prev = &temp->next;
330 if (*prev)
331 *prev = ep->next;
332 isp116x->load[i] -= ep->load;
333 }
334 ep->branch = PERIODIC_SIZE;
335 isp116x_to_hcd(isp116x)->self.bandwidth_allocated -=
336 ep->load / ep->period;
337
338 /* switch irq type? */
339 if (!--isp116x->periodic_count) {
340 isp116x->irqenb &= ~HCuPINT_SOF;
341 isp116x->irqenb |= HCuPINT_ATL;
342 }
343}
344
345/*
346 Analyze transfer results, handle partial transfers and errors
347*/
348static void postproc_atl_queue(struct isp116x *isp116x)
349{
350 struct isp116x_ep *ep;
351 struct urb *urb;
352 struct usb_device *udev;
353 struct ptd *ptd;
354 int short_not_ok;
355 int status;
356 u8 cc;
357
358 for (ep = isp116x->atl_active; ep; ep = ep->active) {
359 BUG_ON(list_empty(&ep->hep->urb_list));
360 urb =
361 container_of(ep->hep->urb_list.next, struct urb, urb_list);
362 udev = urb->dev;
363 ptd = &ep->ptd;
364 cc = PTD_GET_CC(ptd);
365 short_not_ok = 1;
366 status = -EINPROGRESS;
367
368 /* Data underrun is special. For allowed underrun
369 we clear the error and continue as normal. For
370 forbidden underrun we finish the DATA stage
371 immediately while for control transfer,
372 we do a STATUS stage. */
373 if (cc == TD_DATAUNDERRUN) {
374 if (!(urb->transfer_flags & URB_SHORT_NOT_OK) ||
375 usb_pipecontrol(urb->pipe)) {
376 DBG("Allowed or control data underrun\n");
377 cc = TD_CC_NOERROR;
378 short_not_ok = 0;
379 } else {
380 ep->error_count = 1;
381 usb_settoggle(udev, ep->epnum,
382 ep->nextpid == USB_PID_OUT,
383 PTD_GET_TOGGLE(ptd));
384 urb->actual_length += PTD_GET_COUNT(ptd);
385 status = cc_to_error[TD_DATAUNDERRUN];
386 goto done;
387 }
388 }
389
390 if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED
391 && (++ep->error_count >= 3 || cc == TD_CC_STALL
392 || cc == TD_DATAOVERRUN)) {
393 status = cc_to_error[cc];
394 if (ep->nextpid == USB_PID_ACK)
395 ep->nextpid = 0;
396 goto done;
397 }
398 /* According to usb spec, zero-length Int transfer signals
399 finishing of the urb. Hey, does this apply only
400 for IN endpoints? */
401 if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) {
402 status = 0;
403 goto done;
404 }
405
406 /* Relax after previously failed, but later succeeded
407 or correctly NAK'ed retransmission attempt */
408 if (ep->error_count
409 && (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED))
410 ep->error_count = 0;
411
412 /* Take into account idiosyncracies of the isp116x chip
413 regarding toggle bit for failed transfers */
414 if (ep->nextpid == USB_PID_OUT)
415 usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd)
416 ^ (ep->error_count > 0));
417 else if (ep->nextpid == USB_PID_IN)
418 usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd)
419 ^ (ep->error_count > 0));
420
421 switch (ep->nextpid) {
422 case USB_PID_IN:
423 case USB_PID_OUT:
424 urb->actual_length += PTD_GET_COUNT(ptd);
425 if (PTD_GET_ACTIVE(ptd)
426 || (cc != TD_CC_NOERROR && cc < 0x0E))
427 break;
428 if (urb->transfer_buffer_length != urb->actual_length) {
429 if (short_not_ok)
430 break;
431 } else {
432 if (urb->transfer_flags & URB_ZERO_PACKET
433 && ep->nextpid == USB_PID_OUT
434 && !(PTD_GET_COUNT(ptd) % ep->maxpacket)) {
435 DBG("Zero packet requested\n");
436 break;
437 }
438 }
439 /* All data for this URB is transferred, let's finish */
440 if (usb_pipecontrol(urb->pipe))
441 ep->nextpid = USB_PID_ACK;
442 else
443 status = 0;
444 break;
445 case USB_PID_SETUP:
446 if (PTD_GET_ACTIVE(ptd)
447 || (cc != TD_CC_NOERROR && cc < 0x0E))
448 break;
449 if (urb->transfer_buffer_length == urb->actual_length)
450 ep->nextpid = USB_PID_ACK;
451 else if (usb_pipeout(urb->pipe)) {
452 usb_settoggle(udev, 0, 1, 1);
453 ep->nextpid = USB_PID_OUT;
454 } else {
455 usb_settoggle(udev, 0, 0, 1);
456 ep->nextpid = USB_PID_IN;
457 }
458 break;
459 case USB_PID_ACK:
460 if (PTD_GET_ACTIVE(ptd)
461 || (cc != TD_CC_NOERROR && cc < 0x0E))
462 break;
463 status = 0;
464 ep->nextpid = 0;
465 break;
466 default:
467 BUG();
468 }
469
470 done:
471 if (status != -EINPROGRESS || urb->unlinked)
472 finish_request(isp116x, ep, urb, status);
473 }
474}
475
476/*
477 Scan transfer lists, schedule transfers, send data off
478 to chip.
479 */
480static void start_atl_transfers(struct isp116x *isp116x)
481{
482 struct isp116x_ep *last_ep = NULL, *ep;
483 struct urb *urb;
484 u16 load = 0;
485 int len, index, speed, byte_time;
486
487 if (atomic_read(&isp116x->atl_finishing))
488 return;
489
490 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state))
491 return;
492
493 /* FIFO not empty? */
494 if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL)
495 return;
496
497 isp116x->atl_active = NULL;
498 isp116x->atl_buflen = isp116x->atl_bufshrt = 0;
499
500 /* Schedule int transfers */
501 if (isp116x->periodic_count) {
502 isp116x->fmindex = index =
503 (isp116x->fmindex + 1) & (PERIODIC_SIZE - 1);
504 load = isp116x->load[index];
505 if (load) {
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*/
577static 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
591static 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 usb_hc_died(hcd);
616 ret = IRQ_HANDLED;
617 goto done;
618 }
619 if (intstat & HCINT_RHSC)
620 /* When root hub or any of its ports is going
621 to come out of suspend, it may take more
622 than 10ms for status bits to stabilize. */
623 mod_timer(&hcd->rh_timer, jiffies
624 + msecs_to_jiffies(20) + 1);
625 if (intstat & HCINT_RD) {
626 DBG("---- remote wakeup\n");
627 usb_hcd_resume_root_hub(hcd);
628 }
629 irqstat &= ~HCuPINT_OPR;
630 ret = IRQ_HANDLED;
631 }
632
633 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
634 start_atl_transfers(isp116x);
635 }
636
637 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
638 done:
639 spin_unlock(&isp116x->lock);
640 return ret;
641}
642
643/*-----------------------------------------------------------------*/
644
645/* usb 1.1 says max 90% of a frame is available for periodic transfers.
646 * this driver doesn't promise that much since it's got to handle an
647 * IRQ per packet; irq handling latencies also use up that time.
648 */
649
650/* out of 1000 us */
651#define MAX_PERIODIC_LOAD 600
652static int balance(struct isp116x *isp116x, u16 period, u16 load)
653{
654 int i, branch = -ENOSPC;
655
656 /* search for the least loaded schedule branch of that period
657 which has enough bandwidth left unreserved. */
658 for (i = 0; i < period; i++) {
659 if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) {
660 int j;
661
662 for (j = i; j < PERIODIC_SIZE; j += period) {
663 if ((isp116x->load[j] + load)
664 > MAX_PERIODIC_LOAD)
665 break;
666 }
667 if (j < PERIODIC_SIZE)
668 continue;
669 branch = i;
670 }
671 }
672 return branch;
673}
674
675/* NB! ALL the code above this point runs with isp116x->lock
676 held, irqs off
677*/
678
679/*-----------------------------------------------------------------*/
680
681static int isp116x_urb_enqueue(struct usb_hcd *hcd,
682 struct urb *urb,
683 gfp_t mem_flags)
684{
685 struct isp116x *isp116x = hcd_to_isp116x(hcd);
686 struct usb_device *udev = urb->dev;
687 unsigned int pipe = urb->pipe;
688 int is_out = !usb_pipein(pipe);
689 int type = usb_pipetype(pipe);
690 int epnum = usb_pipeendpoint(pipe);
691 struct usb_host_endpoint *hep = urb->ep;
692 struct isp116x_ep *ep = NULL;
693 unsigned long flags;
694 int i;
695 int ret = 0;
696
697 urb_dbg(urb, "Enqueue");
698
699 if (type == PIPE_ISOCHRONOUS) {
700 ERR("Isochronous transfers not supported\n");
701 urb_dbg(urb, "Refused to enqueue");
702 return -ENXIO;
703 }
704 /* avoid all allocations within spinlocks: request or endpoint */
705 if (!hep->hcpriv) {
706 ep = kzalloc(sizeof *ep, mem_flags);
707 if (!ep)
708 return -ENOMEM;
709 }
710
711 spin_lock_irqsave(&isp116x->lock, flags);
712 if (!HC_IS_RUNNING(hcd->state)) {
713 kfree(ep);
714 ret = -ENODEV;
715 goto fail_not_linked;
716 }
717 ret = usb_hcd_link_urb_to_ep(hcd, urb);
718 if (ret) {
719 kfree(ep);
720 goto fail_not_linked;
721 }
722
723 if (hep->hcpriv)
724 ep = hep->hcpriv;
725 else {
726 INIT_LIST_HEAD(&ep->schedule);
727 ep->udev = udev;
728 ep->epnum = epnum;
729 ep->maxpacket = usb_maxpacket(udev, urb->pipe);
730 usb_settoggle(udev, epnum, is_out, 0);
731
732 if (type == PIPE_CONTROL) {
733 ep->nextpid = USB_PID_SETUP;
734 } else if (is_out) {
735 ep->nextpid = USB_PID_OUT;
736 } else {
737 ep->nextpid = USB_PID_IN;
738 }
739
740 if (urb->interval) {
741 /*
742 With INT URBs submitted, the driver works with SOF
743 interrupt enabled and ATL interrupt disabled. After
744 the PTDs are written to fifo ram, the chip starts
745 fifo processing and usb transfers after the next
746 SOF and continues until the transfers are finished
747 (succeeded or failed) or the frame ends. Therefore,
748 the transfers occur only in every second frame,
749 while fifo reading/writing and data processing
750 occur in every other second frame. */
751 if (urb->interval < 2)
752 urb->interval = 2;
753 if (urb->interval > 2 * PERIODIC_SIZE)
754 urb->interval = 2 * PERIODIC_SIZE;
755 ep->period = urb->interval >> 1;
756 ep->branch = PERIODIC_SIZE;
757 ep->load = usb_calc_bus_time(udev->speed,
758 !is_out,
759 (type == PIPE_ISOCHRONOUS),
760 usb_maxpacket(udev, pipe)) /
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*/
836static 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
873static 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
892static 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*/
907static 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
942static void isp116x_hub_descriptor(struct isp116x *isp116x,
943 struct usb_hub_descriptor *desc)
944{
945 u32 reg = isp116x->rhdesca;
946
947 desc->bDescriptorType = USB_DT_HUB;
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) &
953 (HUB_CHAR_LPSM |
954 HUB_CHAR_COMPOUND |
955 HUB_CHAR_OCPM)));
956 desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff);
957 /* ports removable, and legacy PortPwrCtrlMask */
958 desc->u.hs.DeviceRemovable[0] = 0;
959 desc->u.hs.DeviceRemovable[1] = ~0;
960}
961
962/* Perform reset of a given port.
963 It would be great to just start the reset and let the
964 USB core to clear the reset in due time. However,
965 root hub ports should be reset for at least 50 ms, while
966 our chip stays in reset for about 10 ms. I.e., we must
967 repeatedly reset it ourself here.
968*/
969static inline void root_port_reset(struct isp116x *isp116x, unsigned port)
970{
971 u32 tmp;
972 unsigned long flags, t;
973
974 /* Root hub reset should be 50 ms, but some devices
975 want it even longer. */
976 t = jiffies + msecs_to_jiffies(100);
977
978 while (time_before(jiffies, t)) {
979 spin_lock_irqsave(&isp116x->lock, flags);
980 /* spin until any current reset finishes */
981 for (;;) {
982 tmp = isp116x_read_reg32(isp116x, port ?
983 HCRHPORT2 : HCRHPORT1);
984 if (!(tmp & RH_PS_PRS))
985 break;
986 udelay(500);
987 }
988 /* Don't reset a disconnected port */
989 if (!(tmp & RH_PS_CCS)) {
990 spin_unlock_irqrestore(&isp116x->lock, flags);
991 break;
992 }
993 /* Reset lasts 10ms (claims datasheet) */
994 isp116x_write_reg32(isp116x, port ? HCRHPORT2 :
995 HCRHPORT1, (RH_PS_PRS));
996 spin_unlock_irqrestore(&isp116x->lock, flags);
997 msleep(10);
998 }
999}
1000
1001/* Adapted from ohci-hub.c */
1002static int isp116x_hub_control(struct usb_hcd *hcd,
1003 u16 typeReq,
1004 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1005{
1006 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1007 int ret = 0;
1008 unsigned long flags;
1009 int ports = isp116x->rhdesca & RH_A_NDP;
1010 u32 tmp = 0;
1011
1012 switch (typeReq) {
1013 case ClearHubFeature:
1014 DBG("ClearHubFeature: ");
1015 switch (wValue) {
1016 case C_HUB_OVER_CURRENT:
1017 DBG("C_HUB_OVER_CURRENT\n");
1018 spin_lock_irqsave(&isp116x->lock, flags);
1019 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
1020 spin_unlock_irqrestore(&isp116x->lock, flags);
1021 fallthrough;
1022 case C_HUB_LOCAL_POWER:
1023 DBG("C_HUB_LOCAL_POWER\n");
1024 break;
1025 default:
1026 goto error;
1027 }
1028 break;
1029 case SetHubFeature:
1030 DBG("SetHubFeature: ");
1031 switch (wValue) {
1032 case C_HUB_OVER_CURRENT:
1033 case C_HUB_LOCAL_POWER:
1034 DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
1035 break;
1036 default:
1037 goto error;
1038 }
1039 break;
1040 case GetHubDescriptor:
1041 DBG("GetHubDescriptor\n");
1042 isp116x_hub_descriptor(isp116x,
1043 (struct usb_hub_descriptor *)buf);
1044 break;
1045 case GetHubStatus:
1046 DBG("GetHubStatus\n");
1047 *(__le32 *) buf = 0;
1048 break;
1049 case GetPortStatus:
1050 DBG("GetPortStatus\n");
1051 if (!wIndex || wIndex > ports)
1052 goto error;
1053 spin_lock_irqsave(&isp116x->lock, flags);
1054 tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
1055 spin_unlock_irqrestore(&isp116x->lock, flags);
1056 *(__le32 *) buf = cpu_to_le32(tmp);
1057 DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp);
1058 break;
1059 case ClearPortFeature:
1060 DBG("ClearPortFeature: ");
1061 if (!wIndex || wIndex > ports)
1062 goto error;
1063 wIndex--;
1064
1065 switch (wValue) {
1066 case USB_PORT_FEAT_ENABLE:
1067 DBG("USB_PORT_FEAT_ENABLE\n");
1068 tmp = RH_PS_CCS;
1069 break;
1070 case USB_PORT_FEAT_C_ENABLE:
1071 DBG("USB_PORT_FEAT_C_ENABLE\n");
1072 tmp = RH_PS_PESC;
1073 break;
1074 case USB_PORT_FEAT_SUSPEND:
1075 DBG("USB_PORT_FEAT_SUSPEND\n");
1076 tmp = RH_PS_POCI;
1077 break;
1078 case USB_PORT_FEAT_C_SUSPEND:
1079 DBG("USB_PORT_FEAT_C_SUSPEND\n");
1080 tmp = RH_PS_PSSC;
1081 break;
1082 case USB_PORT_FEAT_POWER:
1083 DBG("USB_PORT_FEAT_POWER\n");
1084 tmp = RH_PS_LSDA;
1085 break;
1086 case USB_PORT_FEAT_C_CONNECTION:
1087 DBG("USB_PORT_FEAT_C_CONNECTION\n");
1088 tmp = RH_PS_CSC;
1089 break;
1090 case USB_PORT_FEAT_C_OVER_CURRENT:
1091 DBG("USB_PORT_FEAT_C_OVER_CURRENT\n");
1092 tmp = RH_PS_OCIC;
1093 break;
1094 case USB_PORT_FEAT_C_RESET:
1095 DBG("USB_PORT_FEAT_C_RESET\n");
1096 tmp = RH_PS_PRSC;
1097 break;
1098 default:
1099 goto error;
1100 }
1101 spin_lock_irqsave(&isp116x->lock, flags);
1102 isp116x_write_reg32(isp116x, wIndex
1103 ? HCRHPORT2 : HCRHPORT1, tmp);
1104 spin_unlock_irqrestore(&isp116x->lock, flags);
1105 break;
1106 case SetPortFeature:
1107 DBG("SetPortFeature: ");
1108 if (!wIndex || wIndex > ports)
1109 goto error;
1110 wIndex--;
1111 switch (wValue) {
1112 case USB_PORT_FEAT_SUSPEND:
1113 DBG("USB_PORT_FEAT_SUSPEND\n");
1114 spin_lock_irqsave(&isp116x->lock, flags);
1115 isp116x_write_reg32(isp116x, wIndex
1116 ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS);
1117 spin_unlock_irqrestore(&isp116x->lock, flags);
1118 break;
1119 case USB_PORT_FEAT_POWER:
1120 DBG("USB_PORT_FEAT_POWER\n");
1121 spin_lock_irqsave(&isp116x->lock, flags);
1122 isp116x_write_reg32(isp116x, wIndex
1123 ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS);
1124 spin_unlock_irqrestore(&isp116x->lock, flags);
1125 break;
1126 case USB_PORT_FEAT_RESET:
1127 DBG("USB_PORT_FEAT_RESET\n");
1128 root_port_reset(isp116x, wIndex);
1129 break;
1130 default:
1131 goto error;
1132 }
1133 break;
1134
1135 default:
1136 error:
1137 /* "protocol stall" on error */
1138 DBG("PROTOCOL STALL\n");
1139 ret = -EPIPE;
1140 }
1141 return ret;
1142}
1143
1144/*-----------------------------------------------------------------*/
1145
1146#ifdef CONFIG_DEBUG_FS
1147
1148static void dump_irq(struct seq_file *s, char *label, u16 mask)
1149{
1150 seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask,
1151 mask & HCuPINT_CLKRDY ? " clkrdy" : "",
1152 mask & HCuPINT_SUSP ? " susp" : "",
1153 mask & HCuPINT_OPR ? " opr" : "",
1154 mask & HCuPINT_AIIEOT ? " eot" : "",
1155 mask & HCuPINT_ATL ? " atl" : "",
1156 mask & HCuPINT_SOF ? " sof" : "");
1157}
1158
1159static void dump_int(struct seq_file *s, char *label, u32 mask)
1160{
1161 seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask,
1162 mask & HCINT_MIE ? " MIE" : "",
1163 mask & HCINT_RHSC ? " rhsc" : "",
1164 mask & HCINT_FNO ? " fno" : "",
1165 mask & HCINT_UE ? " ue" : "",
1166 mask & HCINT_RD ? " rd" : "",
1167 mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : "");
1168}
1169
1170static int isp116x_debug_show(struct seq_file *s, void *unused)
1171{
1172 struct isp116x *isp116x = s->private;
1173
1174 seq_printf(s, "%s\n%s version %s\n",
1175 isp116x_to_hcd(isp116x)->product_desc, hcd_name,
1176 DRIVER_VERSION);
1177
1178 if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) {
1179 seq_printf(s, "HCD is suspended\n");
1180 return 0;
1181 }
1182 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) {
1183 seq_printf(s, "HCD not running\n");
1184 return 0;
1185 }
1186
1187 spin_lock_irq(&isp116x->lock);
1188 dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB));
1189 dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT));
1190 dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB));
1191 dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT));
1192 isp116x_show_regs_seq(isp116x, s);
1193 spin_unlock_irq(&isp116x->lock);
1194 seq_printf(s, "\n");
1195
1196 return 0;
1197}
1198DEFINE_SHOW_ATTRIBUTE(isp116x_debug);
1199
1200static void create_debug_file(struct isp116x *isp116x)
1201{
1202 debugfs_create_file(hcd_name, S_IRUGO, usb_debug_root, isp116x,
1203 &isp116x_debug_fops);
1204}
1205
1206static void remove_debug_file(struct isp116x *isp116x)
1207{
1208 debugfs_lookup_and_remove(hcd_name, usb_debug_root);
1209}
1210
1211#else
1212
1213static inline void create_debug_file(struct isp116x *isp116x) { }
1214static inline void remove_debug_file(struct isp116x *isp116x) { }
1215
1216#endif /* CONFIG_DEBUG_FS */
1217
1218/*-----------------------------------------------------------------*/
1219
1220/*
1221 Software reset - can be called from any contect.
1222*/
1223static int isp116x_sw_reset(struct isp116x *isp116x)
1224{
1225 int retries = 15;
1226 unsigned long flags;
1227 int ret = 0;
1228
1229 spin_lock_irqsave(&isp116x->lock, flags);
1230 isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
1231 isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
1232 while (--retries) {
1233 /* It usually resets within 1 ms */
1234 mdelay(1);
1235 if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
1236 break;
1237 }
1238 if (!retries) {
1239 ERR("Software reset timeout\n");
1240 ret = -ETIME;
1241 }
1242 spin_unlock_irqrestore(&isp116x->lock, flags);
1243 return ret;
1244}
1245
1246static int isp116x_reset(struct usb_hcd *hcd)
1247{
1248 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1249 unsigned long t;
1250 u16 clkrdy = 0;
1251 int ret, timeout = 15 /* ms */ ;
1252
1253 ret = isp116x_sw_reset(isp116x);
1254 if (ret)
1255 return ret;
1256
1257 t = jiffies + msecs_to_jiffies(timeout);
1258 while (time_before_eq(jiffies, t)) {
1259 msleep(4);
1260 spin_lock_irq(&isp116x->lock);
1261 clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
1262 spin_unlock_irq(&isp116x->lock);
1263 if (clkrdy)
1264 break;
1265 }
1266 if (!clkrdy) {
1267 ERR("Clock not ready after %dms\n", timeout);
1268 /* After sw_reset the clock won't report to be ready, if
1269 H_WAKEUP pin is high. */
1270 ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
1271 ret = -ENODEV;
1272 }
1273 return ret;
1274}
1275
1276static void isp116x_stop(struct usb_hcd *hcd)
1277{
1278 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1279 unsigned long flags;
1280 u32 val;
1281
1282 spin_lock_irqsave(&isp116x->lock, flags);
1283 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1284
1285 /* Switch off ports' power, some devices don't come up
1286 after next 'insmod' without this */
1287 val = isp116x_read_reg32(isp116x, HCRHDESCA);
1288 val &= ~(RH_A_NPS | RH_A_PSM);
1289 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1290 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
1291 spin_unlock_irqrestore(&isp116x->lock, flags);
1292
1293 isp116x_sw_reset(isp116x);
1294}
1295
1296/*
1297 Configure the chip. The chip must be successfully reset by now.
1298*/
1299static int isp116x_start(struct usb_hcd *hcd)
1300{
1301 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1302 struct isp116x_platform_data *board = isp116x->board;
1303 u32 val;
1304 unsigned long flags;
1305
1306 spin_lock_irqsave(&isp116x->lock, flags);
1307
1308 /* clear interrupt status and disable all interrupt sources */
1309 isp116x_write_reg16(isp116x, HCuPINT, 0xff);
1310 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1311
1312 val = isp116x_read_reg16(isp116x, HCCHIPID);
1313 if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
1314 ERR("Invalid chip ID %04x\n", val);
1315 spin_unlock_irqrestore(&isp116x->lock, flags);
1316 return -ENODEV;
1317 }
1318
1319 /* To be removed in future */
1320 hcd->uses_new_polling = 1;
1321
1322 isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
1323 isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);
1324
1325 /* ----- HW conf */
1326 val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
1327 if (board->sel15Kres)
1328 val |= HCHWCFG_15KRSEL;
1329 /* Remote wakeup won't work without working clock */
1330 if (board->remote_wakeup_enable)
1331 val |= HCHWCFG_CLKNOTSTOP;
1332 if (board->oc_enable)
1333 val |= HCHWCFG_ANALOG_OC;
1334 if (board->int_act_high)
1335 val |= HCHWCFG_INT_POL;
1336 if (board->int_edge_triggered)
1337 val |= HCHWCFG_INT_TRIGGER;
1338 isp116x_write_reg16(isp116x, HCHWCFG, val);
1339
1340 /* ----- Root hub conf */
1341 val = (25 << 24) & RH_A_POTPGT;
1342 /* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
1343 be always set. Yet, instead, we request individual port
1344 power switching. */
1345 val |= RH_A_PSM;
1346 /* Report overcurrent per port */
1347 val |= RH_A_OCPM;
1348 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1349 isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);
1350
1351 val = RH_B_PPCM;
1352 isp116x_write_reg32(isp116x, HCRHDESCB, val);
1353 isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);
1354
1355 val = 0;
1356 if (board->remote_wakeup_enable) {
1357 if (!device_can_wakeup(hcd->self.controller))
1358 device_init_wakeup(hcd->self.controller, 1);
1359 val |= RH_HS_DRWE;
1360 }
1361 isp116x_write_reg32(isp116x, HCRHSTATUS, val);
1362 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
1363
1364 isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);
1365
1366 hcd->state = HC_STATE_RUNNING;
1367
1368 /* Set up interrupts */
1369 isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE;
1370 if (board->remote_wakeup_enable)
1371 isp116x->intenb |= HCINT_RD;
1372 isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */
1373 isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb);
1374 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
1375
1376 /* Go operational */
1377 val = HCCONTROL_USB_OPER;
1378 if (board->remote_wakeup_enable)
1379 val |= HCCONTROL_RWE;
1380 isp116x_write_reg32(isp116x, HCCONTROL, val);
1381
1382 /* Disable ports to avoid race in device enumeration */
1383 isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
1384 isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);
1385
1386 isp116x_show_regs_log(isp116x);
1387 spin_unlock_irqrestore(&isp116x->lock, flags);
1388 return 0;
1389}
1390
1391#ifdef CONFIG_PM
1392
1393static int isp116x_bus_suspend(struct usb_hcd *hcd)
1394{
1395 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1396 unsigned long flags;
1397 u32 val;
1398 int ret = 0;
1399
1400 spin_lock_irqsave(&isp116x->lock, flags);
1401 val = isp116x_read_reg32(isp116x, HCCONTROL);
1402
1403 switch (val & HCCONTROL_HCFS) {
1404 case HCCONTROL_USB_OPER:
1405 spin_unlock_irqrestore(&isp116x->lock, flags);
1406 val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
1407 val |= HCCONTROL_USB_SUSPEND;
1408 if (hcd->self.root_hub->do_remote_wakeup)
1409 val |= HCCONTROL_RWE;
1410 /* Wait for usb transfers to finish */
1411 msleep(2);
1412 spin_lock_irqsave(&isp116x->lock, flags);
1413 isp116x_write_reg32(isp116x, HCCONTROL, val);
1414 spin_unlock_irqrestore(&isp116x->lock, flags);
1415 /* Wait for devices to suspend */
1416 msleep(5);
1417 break;
1418 case HCCONTROL_USB_RESUME:
1419 isp116x_write_reg32(isp116x, HCCONTROL,
1420 (val & ~HCCONTROL_HCFS) |
1421 HCCONTROL_USB_RESET);
1422 fallthrough;
1423 case HCCONTROL_USB_RESET:
1424 ret = -EBUSY;
1425 fallthrough;
1426 default: /* HCCONTROL_USB_SUSPEND */
1427 spin_unlock_irqrestore(&isp116x->lock, flags);
1428 break;
1429 }
1430
1431 return ret;
1432}
1433
1434static int isp116x_bus_resume(struct usb_hcd *hcd)
1435{
1436 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1437 u32 val;
1438
1439 msleep(5);
1440 spin_lock_irq(&isp116x->lock);
1441
1442 val = isp116x_read_reg32(isp116x, HCCONTROL);
1443 switch (val & HCCONTROL_HCFS) {
1444 case HCCONTROL_USB_SUSPEND:
1445 val &= ~HCCONTROL_HCFS;
1446 val |= HCCONTROL_USB_RESUME;
1447 isp116x_write_reg32(isp116x, HCCONTROL, val);
1448 break;
1449 case HCCONTROL_USB_RESUME:
1450 break;
1451 case HCCONTROL_USB_OPER:
1452 spin_unlock_irq(&isp116x->lock);
1453 return 0;
1454 default:
1455 /* HCCONTROL_USB_RESET: this may happen, when during
1456 suspension the HC lost power. Reinitialize completely */
1457 spin_unlock_irq(&isp116x->lock);
1458 DBG("Chip has been reset while suspended. Reinit from scratch.\n");
1459 isp116x_reset(hcd);
1460 isp116x_start(hcd);
1461 isp116x_hub_control(hcd, SetPortFeature,
1462 USB_PORT_FEAT_POWER, 1, NULL, 0);
1463 if ((isp116x->rhdesca & RH_A_NDP) == 2)
1464 isp116x_hub_control(hcd, SetPortFeature,
1465 USB_PORT_FEAT_POWER, 2, NULL, 0);
1466 return 0;
1467 }
1468
1469 val = isp116x->rhdesca & RH_A_NDP;
1470 while (val--) {
1471 u32 stat =
1472 isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1);
1473 /* force global, not selective, resume */
1474 if (!(stat & RH_PS_PSS))
1475 continue;
1476 DBG("%s: Resuming port %d\n", __func__, val);
1477 isp116x_write_reg32(isp116x, RH_PS_POCI, val
1478 ? HCRHPORT2 : HCRHPORT1);
1479 }
1480 spin_unlock_irq(&isp116x->lock);
1481
1482 hcd->state = HC_STATE_RESUMING;
1483 msleep(USB_RESUME_TIMEOUT);
1484
1485 /* Go operational */
1486 spin_lock_irq(&isp116x->lock);
1487 val = isp116x_read_reg32(isp116x, HCCONTROL);
1488 isp116x_write_reg32(isp116x, HCCONTROL,
1489 (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER);
1490 spin_unlock_irq(&isp116x->lock);
1491 hcd->state = HC_STATE_RUNNING;
1492
1493 return 0;
1494}
1495
1496#else
1497
1498#define isp116x_bus_suspend NULL
1499#define isp116x_bus_resume NULL
1500
1501#endif
1502
1503static const struct hc_driver isp116x_hc_driver = {
1504 .description = hcd_name,
1505 .product_desc = "ISP116x Host Controller",
1506 .hcd_priv_size = sizeof(struct isp116x),
1507
1508 .irq = isp116x_irq,
1509 .flags = HCD_USB11,
1510
1511 .reset = isp116x_reset,
1512 .start = isp116x_start,
1513 .stop = isp116x_stop,
1514
1515 .urb_enqueue = isp116x_urb_enqueue,
1516 .urb_dequeue = isp116x_urb_dequeue,
1517 .endpoint_disable = isp116x_endpoint_disable,
1518
1519 .get_frame_number = isp116x_get_frame,
1520
1521 .hub_status_data = isp116x_hub_status_data,
1522 .hub_control = isp116x_hub_control,
1523 .bus_suspend = isp116x_bus_suspend,
1524 .bus_resume = isp116x_bus_resume,
1525};
1526
1527/*----------------------------------------------------------------*/
1528
1529static void isp116x_remove(struct platform_device *pdev)
1530{
1531 struct usb_hcd *hcd = platform_get_drvdata(pdev);
1532 struct isp116x *isp116x;
1533 struct resource *res;
1534
1535 if (!hcd)
1536 return;
1537 isp116x = hcd_to_isp116x(hcd);
1538 remove_debug_file(isp116x);
1539 usb_remove_hcd(hcd);
1540
1541 iounmap(isp116x->data_reg);
1542 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1543 if (res)
1544 release_mem_region(res->start, 2);
1545 iounmap(isp116x->addr_reg);
1546 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1547 if (res)
1548 release_mem_region(res->start, 2);
1549
1550 usb_put_hcd(hcd);
1551}
1552
1553static int isp116x_probe(struct platform_device *pdev)
1554{
1555 struct usb_hcd *hcd;
1556 struct isp116x *isp116x;
1557 struct resource *addr, *data, *ires;
1558 void __iomem *addr_reg;
1559 void __iomem *data_reg;
1560 int irq;
1561 int ret = 0;
1562 unsigned long irqflags;
1563
1564 if (usb_disabled())
1565 return -ENODEV;
1566
1567 if (pdev->num_resources < 3) {
1568 ret = -ENODEV;
1569 goto err1;
1570 }
1571
1572 data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1573 addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1574 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1575
1576 if (!addr || !data || !ires) {
1577 ret = -ENODEV;
1578 goto err1;
1579 }
1580
1581 irq = ires->start;
1582 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1583
1584 if (!request_mem_region(addr->start, 2, hcd_name)) {
1585 ret = -EBUSY;
1586 goto err1;
1587 }
1588 addr_reg = ioremap(addr->start, resource_size(addr));
1589 if (addr_reg == NULL) {
1590 ret = -ENOMEM;
1591 goto err2;
1592 }
1593 if (!request_mem_region(data->start, 2, hcd_name)) {
1594 ret = -EBUSY;
1595 goto err3;
1596 }
1597 data_reg = ioremap(data->start, resource_size(data));
1598 if (data_reg == NULL) {
1599 ret = -ENOMEM;
1600 goto err4;
1601 }
1602
1603 /* allocate and initialize hcd */
1604 hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev));
1605 if (!hcd) {
1606 ret = -ENOMEM;
1607 goto err5;
1608 }
1609 /* this rsrc_start is bogus */
1610 hcd->rsrc_start = addr->start;
1611 isp116x = hcd_to_isp116x(hcd);
1612 isp116x->data_reg = data_reg;
1613 isp116x->addr_reg = addr_reg;
1614 spin_lock_init(&isp116x->lock);
1615 INIT_LIST_HEAD(&isp116x->async);
1616 isp116x->board = dev_get_platdata(&pdev->dev);
1617
1618 if (!isp116x->board) {
1619 ERR("Platform data structure not initialized\n");
1620 ret = -ENODEV;
1621 goto err6;
1622 }
1623 if (isp116x_check_platform_delay(isp116x)) {
1624 ERR("USE_PLATFORM_DELAY defined, but delay function not "
1625 "implemented.\n");
1626 ERR("See comments in drivers/usb/host/isp116x-hcd.c\n");
1627 ret = -ENODEV;
1628 goto err6;
1629 }
1630
1631 ret = usb_add_hcd(hcd, irq, irqflags);
1632 if (ret)
1633 goto err6;
1634
1635 device_wakeup_enable(hcd->self.controller);
1636
1637 create_debug_file(isp116x);
1638
1639 return 0;
1640
1641 err6:
1642 usb_put_hcd(hcd);
1643 err5:
1644 iounmap(data_reg);
1645 err4:
1646 release_mem_region(data->start, 2);
1647 err3:
1648 iounmap(addr_reg);
1649 err2:
1650 release_mem_region(addr->start, 2);
1651 err1:
1652 ERR("init error, %d\n", ret);
1653 return ret;
1654}
1655
1656#ifdef CONFIG_PM
1657/*
1658 Suspend of platform device
1659*/
1660static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
1661{
1662 VDBG("%s: state %x\n", __func__, state.event);
1663 return 0;
1664}
1665
1666/*
1667 Resume platform device
1668*/
1669static int isp116x_resume(struct platform_device *dev)
1670{
1671 VDBG("%s\n", __func__);
1672 return 0;
1673}
1674
1675#else
1676
1677#define isp116x_suspend NULL
1678#define isp116x_resume NULL
1679
1680#endif
1681
1682/* work with hotplug and coldplug */
1683MODULE_ALIAS("platform:isp116x-hcd");
1684
1685static struct platform_driver isp116x_driver = {
1686 .probe = isp116x_probe,
1687 .remove_new = isp116x_remove,
1688 .suspend = isp116x_suspend,
1689 .resume = isp116x_resume,
1690 .driver = {
1691 .name = hcd_name,
1692 },
1693};
1694
1695module_platform_driver(isp116x_driver);
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/list.h>
64#include <linux/slab.h>
65#include <linux/usb.h>
66#include <linux/usb/isp116x.h>
67#include <linux/usb/hcd.h>
68#include <linux/platform_device.h>
69
70#include <asm/io.h>
71#include <asm/irq.h>
72#include <asm/byteorder.h>
73
74#include "isp116x.h"
75
76#define DRIVER_VERSION "03 Nov 2005"
77#define DRIVER_DESC "ISP116x USB Host Controller Driver"
78
79MODULE_DESCRIPTION(DRIVER_DESC);
80MODULE_LICENSE("GPL");
81
82static const char hcd_name[] = "isp116x-hcd";
83
84/*-----------------------------------------------------------------*/
85
86/*
87 Write len bytes to fifo, pad till 32-bit boundary
88 */
89static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len)
90{
91 u8 *dp = (u8 *) buf;
92 u16 *dp2 = (u16 *) buf;
93 u16 w;
94 int quot = len % 4;
95
96 /* buffer is already in 'usb data order', which is LE. */
97 /* When reading buffer as u16, we have to take care byte order */
98 /* doesn't get mixed up */
99
100 if ((unsigned long)dp2 & 1) {
101 /* not aligned */
102 for (; len > 1; len -= 2) {
103 w = *dp++;
104 w |= *dp++ << 8;
105 isp116x_raw_write_data16(isp116x, w);
106 }
107 if (len)
108 isp116x_write_data16(isp116x, (u16) * dp);
109 } else {
110 /* aligned */
111 for (; len > 1; len -= 2) {
112 /* Keep byte order ! */
113 isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++));
114 }
115
116 if (len)
117 isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2));
118 }
119 if (quot == 1 || quot == 2)
120 isp116x_raw_write_data16(isp116x, 0);
121}
122
123/*
124 Read len bytes from fifo and then read till 32-bit boundary.
125 */
126static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len)
127{
128 u8 *dp = (u8 *) buf;
129 u16 *dp2 = (u16 *) buf;
130 u16 w;
131 int quot = len % 4;
132
133 /* buffer is already in 'usb data order', which is LE. */
134 /* When reading buffer as u16, we have to take care byte order */
135 /* doesn't get mixed up */
136
137 if ((unsigned long)dp2 & 1) {
138 /* not aligned */
139 for (; len > 1; len -= 2) {
140 w = isp116x_raw_read_data16(isp116x);
141 *dp++ = w & 0xff;
142 *dp++ = (w >> 8) & 0xff;
143 }
144
145 if (len)
146 *dp = 0xff & isp116x_read_data16(isp116x);
147 } else {
148 /* aligned */
149 for (; len > 1; len -= 2) {
150 /* Keep byte order! */
151 *dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x));
152 }
153
154 if (len)
155 *(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x);
156 }
157 if (quot == 1 || quot == 2)
158 isp116x_raw_read_data16(isp116x);
159}
160
161/*
162 Write ptd's and data for scheduled transfers into
163 the fifo ram. Fifo must be empty and ready.
164*/
165static void pack_fifo(struct isp116x *isp116x)
166{
167 struct isp116x_ep *ep;
168 struct ptd *ptd;
169 int buflen = isp116x->atl_last_dir == PTD_DIR_IN
170 ? isp116x->atl_bufshrt : isp116x->atl_buflen;
171
172 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
173 isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
174 isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET);
175 for (ep = isp116x->atl_active; ep; ep = ep->active) {
176 ptd = &ep->ptd;
177 dump_ptd(ptd);
178 dump_ptd_out_data(ptd, ep->data);
179 isp116x_write_data16(isp116x, ptd->count);
180 isp116x_write_data16(isp116x, ptd->mps);
181 isp116x_write_data16(isp116x, ptd->len);
182 isp116x_write_data16(isp116x, ptd->faddr);
183 buflen -= sizeof(struct ptd);
184 /* Skip writing data for last IN PTD */
185 if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) {
186 write_ptddata_to_fifo(isp116x, ep->data, ep->length);
187 buflen -= ALIGN(ep->length, 4);
188 }
189 }
190 BUG_ON(buflen);
191}
192
193/*
194 Read the processed ptd's and data from fifo ram back to
195 URBs' buffers. Fifo must be full and done
196*/
197static void unpack_fifo(struct isp116x *isp116x)
198{
199 struct isp116x_ep *ep;
200 struct ptd *ptd;
201 int buflen = isp116x->atl_last_dir == PTD_DIR_IN
202 ? isp116x->atl_buflen : isp116x->atl_bufshrt;
203
204 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
205 isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
206 isp116x_write_addr(isp116x, HCATLPORT);
207 for (ep = isp116x->atl_active; ep; ep = ep->active) {
208 ptd = &ep->ptd;
209 ptd->count = isp116x_read_data16(isp116x);
210 ptd->mps = isp116x_read_data16(isp116x);
211 ptd->len = isp116x_read_data16(isp116x);
212 ptd->faddr = isp116x_read_data16(isp116x);
213 buflen -= sizeof(struct ptd);
214 /* Skip reading data for last Setup or Out PTD */
215 if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) {
216 read_ptddata_from_fifo(isp116x, ep->data, ep->length);
217 buflen -= ALIGN(ep->length, 4);
218 }
219 dump_ptd(ptd);
220 dump_ptd_in_data(ptd, ep->data);
221 }
222 BUG_ON(buflen);
223}
224
225/*---------------------------------------------------------------*/
226
227/*
228 Set up PTD's.
229*/
230static void preproc_atl_queue(struct isp116x *isp116x)
231{
232 struct isp116x_ep *ep;
233 struct urb *urb;
234 struct ptd *ptd;
235 u16 len;
236
237 for (ep = isp116x->atl_active; ep; ep = ep->active) {
238 u16 toggle = 0, dir = PTD_DIR_SETUP;
239
240 BUG_ON(list_empty(&ep->hep->urb_list));
241 urb = container_of(ep->hep->urb_list.next,
242 struct urb, urb_list);
243 ptd = &ep->ptd;
244 len = ep->length;
245 ep->data = (unsigned char *)urb->transfer_buffer
246 + urb->actual_length;
247
248 switch (ep->nextpid) {
249 case USB_PID_IN:
250 toggle = usb_gettoggle(urb->dev, ep->epnum, 0);
251 dir = PTD_DIR_IN;
252 break;
253 case USB_PID_OUT:
254 toggle = usb_gettoggle(urb->dev, ep->epnum, 1);
255 dir = PTD_DIR_OUT;
256 break;
257 case USB_PID_SETUP:
258 len = sizeof(struct usb_ctrlrequest);
259 ep->data = urb->setup_packet;
260 break;
261 case USB_PID_ACK:
262 toggle = 1;
263 len = 0;
264 dir = (urb->transfer_buffer_length
265 && usb_pipein(urb->pipe))
266 ? PTD_DIR_OUT : PTD_DIR_IN;
267 break;
268 default:
269 ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__,
270 ep->nextpid);
271 BUG();
272 }
273
274 ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle);
275 ptd->mps = PTD_MPS(ep->maxpacket)
276 | PTD_SPD(urb->dev->speed == USB_SPEED_LOW)
277 | PTD_EP(ep->epnum);
278 ptd->len = PTD_LEN(len) | PTD_DIR(dir);
279 ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe));
280 if (!ep->active) {
281 ptd->mps |= PTD_LAST_MSK;
282 isp116x->atl_last_dir = dir;
283 }
284 isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen;
285 isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4);
286 }
287}
288
289/*
290 Take done or failed requests out of schedule. Give back
291 processed urbs.
292*/
293static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep,
294 struct urb *urb, int status)
295__releases(isp116x->lock) __acquires(isp116x->lock)
296{
297 unsigned i;
298
299 ep->error_count = 0;
300
301 if (usb_pipecontrol(urb->pipe))
302 ep->nextpid = USB_PID_SETUP;
303
304 urb_dbg(urb, "Finish");
305
306 usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb);
307 spin_unlock(&isp116x->lock);
308 usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, status);
309 spin_lock(&isp116x->lock);
310
311 /* take idle endpoints out of the schedule */
312 if (!list_empty(&ep->hep->urb_list))
313 return;
314
315 /* async deschedule */
316 if (!list_empty(&ep->schedule)) {
317 list_del_init(&ep->schedule);
318 return;
319 }
320
321 /* periodic deschedule */
322 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
323 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
324 struct isp116x_ep *temp;
325 struct isp116x_ep **prev = &isp116x->periodic[i];
326
327 while (*prev && ((temp = *prev) != ep))
328 prev = &temp->next;
329 if (*prev)
330 *prev = ep->next;
331 isp116x->load[i] -= ep->load;
332 }
333 ep->branch = PERIODIC_SIZE;
334 isp116x_to_hcd(isp116x)->self.bandwidth_allocated -=
335 ep->load / ep->period;
336
337 /* switch irq type? */
338 if (!--isp116x->periodic_count) {
339 isp116x->irqenb &= ~HCuPINT_SOF;
340 isp116x->irqenb |= HCuPINT_ATL;
341 }
342}
343
344/*
345 Analyze transfer results, handle partial transfers and errors
346*/
347static void postproc_atl_queue(struct isp116x *isp116x)
348{
349 struct isp116x_ep *ep;
350 struct urb *urb;
351 struct usb_device *udev;
352 struct ptd *ptd;
353 int short_not_ok;
354 int status;
355 u8 cc;
356
357 for (ep = isp116x->atl_active; ep; ep = ep->active) {
358 BUG_ON(list_empty(&ep->hep->urb_list));
359 urb =
360 container_of(ep->hep->urb_list.next, struct urb, urb_list);
361 udev = urb->dev;
362 ptd = &ep->ptd;
363 cc = PTD_GET_CC(ptd);
364 short_not_ok = 1;
365 status = -EINPROGRESS;
366
367 /* Data underrun is special. For allowed underrun
368 we clear the error and continue as normal. For
369 forbidden underrun we finish the DATA stage
370 immediately while for control transfer,
371 we do a STATUS stage. */
372 if (cc == TD_DATAUNDERRUN) {
373 if (!(urb->transfer_flags & URB_SHORT_NOT_OK) ||
374 usb_pipecontrol(urb->pipe)) {
375 DBG("Allowed or control data underrun\n");
376 cc = TD_CC_NOERROR;
377 short_not_ok = 0;
378 } else {
379 ep->error_count = 1;
380 usb_settoggle(udev, ep->epnum,
381 ep->nextpid == USB_PID_OUT,
382 PTD_GET_TOGGLE(ptd));
383 urb->actual_length += PTD_GET_COUNT(ptd);
384 status = cc_to_error[TD_DATAUNDERRUN];
385 goto done;
386 }
387 }
388
389 if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED
390 && (++ep->error_count >= 3 || cc == TD_CC_STALL
391 || cc == TD_DATAOVERRUN)) {
392 status = cc_to_error[cc];
393 if (ep->nextpid == USB_PID_ACK)
394 ep->nextpid = 0;
395 goto done;
396 }
397 /* According to usb spec, zero-length Int transfer signals
398 finishing of the urb. Hey, does this apply only
399 for IN endpoints? */
400 if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) {
401 status = 0;
402 goto done;
403 }
404
405 /* Relax after previously failed, but later succeeded
406 or correctly NAK'ed retransmission attempt */
407 if (ep->error_count
408 && (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED))
409 ep->error_count = 0;
410
411 /* Take into account idiosyncracies of the isp116x chip
412 regarding toggle bit for failed transfers */
413 if (ep->nextpid == USB_PID_OUT)
414 usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd)
415 ^ (ep->error_count > 0));
416 else if (ep->nextpid == USB_PID_IN)
417 usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd)
418 ^ (ep->error_count > 0));
419
420 switch (ep->nextpid) {
421 case USB_PID_IN:
422 case USB_PID_OUT:
423 urb->actual_length += PTD_GET_COUNT(ptd);
424 if (PTD_GET_ACTIVE(ptd)
425 || (cc != TD_CC_NOERROR && cc < 0x0E))
426 break;
427 if (urb->transfer_buffer_length != urb->actual_length) {
428 if (short_not_ok)
429 break;
430 } else {
431 if (urb->transfer_flags & URB_ZERO_PACKET
432 && ep->nextpid == USB_PID_OUT
433 && !(PTD_GET_COUNT(ptd) % ep->maxpacket)) {
434 DBG("Zero packet requested\n");
435 break;
436 }
437 }
438 /* All data for this URB is transferred, let's finish */
439 if (usb_pipecontrol(urb->pipe))
440 ep->nextpid = USB_PID_ACK;
441 else
442 status = 0;
443 break;
444 case USB_PID_SETUP:
445 if (PTD_GET_ACTIVE(ptd)
446 || (cc != TD_CC_NOERROR && cc < 0x0E))
447 break;
448 if (urb->transfer_buffer_length == urb->actual_length)
449 ep->nextpid = USB_PID_ACK;
450 else if (usb_pipeout(urb->pipe)) {
451 usb_settoggle(udev, 0, 1, 1);
452 ep->nextpid = USB_PID_OUT;
453 } else {
454 usb_settoggle(udev, 0, 0, 1);
455 ep->nextpid = USB_PID_IN;
456 }
457 break;
458 case USB_PID_ACK:
459 if (PTD_GET_ACTIVE(ptd)
460 || (cc != TD_CC_NOERROR && cc < 0x0E))
461 break;
462 status = 0;
463 ep->nextpid = 0;
464 break;
465 default:
466 BUG();
467 }
468
469 done:
470 if (status != -EINPROGRESS || urb->unlinked)
471 finish_request(isp116x, ep, urb, status);
472 }
473}
474
475/*
476 Scan transfer lists, schedule transfers, send data off
477 to chip.
478 */
479static void start_atl_transfers(struct isp116x *isp116x)
480{
481 struct isp116x_ep *last_ep = NULL, *ep;
482 struct urb *urb;
483 u16 load = 0;
484 int len, index, speed, byte_time;
485
486 if (atomic_read(&isp116x->atl_finishing))
487 return;
488
489 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state))
490 return;
491
492 /* FIFO not empty? */
493 if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL)
494 return;
495
496 isp116x->atl_active = NULL;
497 isp116x->atl_buflen = isp116x->atl_bufshrt = 0;
498
499 /* Schedule int transfers */
500 if (isp116x->periodic_count) {
501 isp116x->fmindex = index =
502 (isp116x->fmindex + 1) & (PERIODIC_SIZE - 1);
503 if ((load = isp116x->load[index])) {
504 /* Bring all int transfers for this frame
505 into the active queue */
506 isp116x->atl_active = last_ep =
507 isp116x->periodic[index];
508 while (last_ep->next)
509 last_ep = (last_ep->active = last_ep->next);
510 last_ep->active = NULL;
511 }
512 }
513
514 /* Schedule control/bulk transfers */
515 list_for_each_entry(ep, &isp116x->async, schedule) {
516 urb = container_of(ep->hep->urb_list.next,
517 struct urb, urb_list);
518 speed = urb->dev->speed;
519 byte_time = speed == USB_SPEED_LOW
520 ? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED;
521
522 if (ep->nextpid == USB_PID_SETUP) {
523 len = sizeof(struct usb_ctrlrequest);
524 } else if (ep->nextpid == USB_PID_ACK) {
525 len = 0;
526 } else {
527 /* Find current free length ... */
528 len = (MAX_LOAD_LIMIT - load) / byte_time;
529
530 /* ... then limit it to configured max size ... */
531 len = min(len, speed == USB_SPEED_LOW ?
532 MAX_TRANSFER_SIZE_LOWSPEED :
533 MAX_TRANSFER_SIZE_FULLSPEED);
534
535 /* ... and finally cut to the multiple of MaxPacketSize,
536 or to the real length if there's enough room. */
537 if (len <
538 (urb->transfer_buffer_length -
539 urb->actual_length)) {
540 len -= len % ep->maxpacket;
541 if (!len)
542 continue;
543 } else
544 len = urb->transfer_buffer_length -
545 urb->actual_length;
546 BUG_ON(len < 0);
547 }
548
549 load += len * byte_time;
550 if (load > MAX_LOAD_LIMIT)
551 break;
552
553 ep->active = NULL;
554 ep->length = len;
555 if (last_ep)
556 last_ep->active = ep;
557 else
558 isp116x->atl_active = ep;
559 last_ep = ep;
560 }
561
562 /* Avoid starving of endpoints */
563 if ((&isp116x->async)->next != (&isp116x->async)->prev)
564 list_move(&isp116x->async, (&isp116x->async)->next);
565
566 if (isp116x->atl_active) {
567 preproc_atl_queue(isp116x);
568 pack_fifo(isp116x);
569 }
570}
571
572/*
573 Finish the processed transfers
574*/
575static void finish_atl_transfers(struct isp116x *isp116x)
576{
577 if (!isp116x->atl_active)
578 return;
579 /* Fifo not ready? */
580 if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE))
581 return;
582
583 atomic_inc(&isp116x->atl_finishing);
584 unpack_fifo(isp116x);
585 postproc_atl_queue(isp116x);
586 atomic_dec(&isp116x->atl_finishing);
587}
588
589static irqreturn_t isp116x_irq(struct usb_hcd *hcd)
590{
591 struct isp116x *isp116x = hcd_to_isp116x(hcd);
592 u16 irqstat;
593 irqreturn_t ret = IRQ_NONE;
594
595 spin_lock(&isp116x->lock);
596 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
597 irqstat = isp116x_read_reg16(isp116x, HCuPINT);
598 isp116x_write_reg16(isp116x, HCuPINT, irqstat);
599
600 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
601 ret = IRQ_HANDLED;
602 finish_atl_transfers(isp116x);
603 }
604
605 if (irqstat & HCuPINT_OPR) {
606 u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT);
607 isp116x_write_reg32(isp116x, HCINTSTAT, intstat);
608 if (intstat & HCINT_UE) {
609 ERR("Unrecoverable error, HC is dead!\n");
610 /* IRQ's are off, we do no DMA,
611 perfectly ready to die ... */
612 hcd->state = HC_STATE_HALT;
613 usb_hc_died(hcd);
614 ret = IRQ_HANDLED;
615 goto done;
616 }
617 if (intstat & HCINT_RHSC)
618 /* When root hub or any of its ports is going
619 to come out of suspend, it may take more
620 than 10ms for status bits to stabilize. */
621 mod_timer(&hcd->rh_timer, jiffies
622 + msecs_to_jiffies(20) + 1);
623 if (intstat & HCINT_RD) {
624 DBG("---- remote wakeup\n");
625 usb_hcd_resume_root_hub(hcd);
626 }
627 irqstat &= ~HCuPINT_OPR;
628 ret = IRQ_HANDLED;
629 }
630
631 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
632 start_atl_transfers(isp116x);
633 }
634
635 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
636 done:
637 spin_unlock(&isp116x->lock);
638 return ret;
639}
640
641/*-----------------------------------------------------------------*/
642
643/* usb 1.1 says max 90% of a frame is available for periodic transfers.
644 * this driver doesn't promise that much since it's got to handle an
645 * IRQ per packet; irq handling latencies also use up that time.
646 */
647
648/* out of 1000 us */
649#define MAX_PERIODIC_LOAD 600
650static int balance(struct isp116x *isp116x, u16 period, u16 load)
651{
652 int i, branch = -ENOSPC;
653
654 /* search for the least loaded schedule branch of that period
655 which has enough bandwidth left unreserved. */
656 for (i = 0; i < period; i++) {
657 if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) {
658 int j;
659
660 for (j = i; j < PERIODIC_SIZE; j += period) {
661 if ((isp116x->load[j] + load)
662 > MAX_PERIODIC_LOAD)
663 break;
664 }
665 if (j < PERIODIC_SIZE)
666 continue;
667 branch = i;
668 }
669 }
670 return branch;
671}
672
673/* NB! ALL the code above this point runs with isp116x->lock
674 held, irqs off
675*/
676
677/*-----------------------------------------------------------------*/
678
679static int isp116x_urb_enqueue(struct usb_hcd *hcd,
680 struct urb *urb,
681 gfp_t mem_flags)
682{
683 struct isp116x *isp116x = hcd_to_isp116x(hcd);
684 struct usb_device *udev = urb->dev;
685 unsigned int pipe = urb->pipe;
686 int is_out = !usb_pipein(pipe);
687 int type = usb_pipetype(pipe);
688 int epnum = usb_pipeendpoint(pipe);
689 struct usb_host_endpoint *hep = urb->ep;
690 struct isp116x_ep *ep = NULL;
691 unsigned long flags;
692 int i;
693 int ret = 0;
694
695 urb_dbg(urb, "Enqueue");
696
697 if (type == PIPE_ISOCHRONOUS) {
698 ERR("Isochronous transfers not supported\n");
699 urb_dbg(urb, "Refused to enqueue");
700 return -ENXIO;
701 }
702 /* avoid all allocations within spinlocks: request or endpoint */
703 if (!hep->hcpriv) {
704 ep = kzalloc(sizeof *ep, mem_flags);
705 if (!ep)
706 return -ENOMEM;
707 }
708
709 spin_lock_irqsave(&isp116x->lock, flags);
710 if (!HC_IS_RUNNING(hcd->state)) {
711 kfree(ep);
712 ret = -ENODEV;
713 goto fail_not_linked;
714 }
715 ret = usb_hcd_link_urb_to_ep(hcd, urb);
716 if (ret) {
717 kfree(ep);
718 goto fail_not_linked;
719 }
720
721 if (hep->hcpriv)
722 ep = hep->hcpriv;
723 else {
724 INIT_LIST_HEAD(&ep->schedule);
725 ep->udev = udev;
726 ep->epnum = epnum;
727 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
728 usb_settoggle(udev, epnum, is_out, 0);
729
730 if (type == PIPE_CONTROL) {
731 ep->nextpid = USB_PID_SETUP;
732 } else if (is_out) {
733 ep->nextpid = USB_PID_OUT;
734 } else {
735 ep->nextpid = USB_PID_IN;
736 }
737
738 if (urb->interval) {
739 /*
740 With INT URBs submitted, the driver works with SOF
741 interrupt enabled and ATL interrupt disabled. After
742 the PTDs are written to fifo ram, the chip starts
743 fifo processing and usb transfers after the next
744 SOF and continues until the transfers are finished
745 (succeeded or failed) or the frame ends. Therefore,
746 the transfers occur only in every second frame,
747 while fifo reading/writing and data processing
748 occur in every other second frame. */
749 if (urb->interval < 2)
750 urb->interval = 2;
751 if (urb->interval > 2 * PERIODIC_SIZE)
752 urb->interval = 2 * PERIODIC_SIZE;
753 ep->period = urb->interval >> 1;
754 ep->branch = PERIODIC_SIZE;
755 ep->load = usb_calc_bus_time(udev->speed,
756 !is_out,
757 (type == PIPE_ISOCHRONOUS),
758 usb_maxpacket(udev, pipe,
759 is_out)) /
760 1000;
761 }
762 hep->hcpriv = ep;
763 ep->hep = hep;
764 }
765
766 /* maybe put endpoint into schedule */
767 switch (type) {
768 case PIPE_CONTROL:
769 case PIPE_BULK:
770 if (list_empty(&ep->schedule))
771 list_add_tail(&ep->schedule, &isp116x->async);
772 break;
773 case PIPE_INTERRUPT:
774 urb->interval = ep->period;
775 ep->length = min_t(u32, ep->maxpacket,
776 urb->transfer_buffer_length);
777
778 /* urb submitted for already existing endpoint */
779 if (ep->branch < PERIODIC_SIZE)
780 break;
781
782 ep->branch = ret = balance(isp116x, ep->period, ep->load);
783 if (ret < 0)
784 goto fail;
785 ret = 0;
786
787 urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1))
788 + ep->branch;
789
790 /* sort each schedule branch by period (slow before fast)
791 to share the faster parts of the tree without needing
792 dummy/placeholder nodes */
793 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
794 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
795 struct isp116x_ep **prev = &isp116x->periodic[i];
796 struct isp116x_ep *here = *prev;
797
798 while (here && ep != here) {
799 if (ep->period > here->period)
800 break;
801 prev = &here->next;
802 here = *prev;
803 }
804 if (ep != here) {
805 ep->next = here;
806 *prev = ep;
807 }
808 isp116x->load[i] += ep->load;
809 }
810 hcd->self.bandwidth_allocated += ep->load / ep->period;
811
812 /* switch over to SOFint */
813 if (!isp116x->periodic_count++) {
814 isp116x->irqenb &= ~HCuPINT_ATL;
815 isp116x->irqenb |= HCuPINT_SOF;
816 isp116x_write_reg16(isp116x, HCuPINTENB,
817 isp116x->irqenb);
818 }
819 }
820
821 urb->hcpriv = hep;
822 start_atl_transfers(isp116x);
823
824 fail:
825 if (ret)
826 usb_hcd_unlink_urb_from_ep(hcd, urb);
827 fail_not_linked:
828 spin_unlock_irqrestore(&isp116x->lock, flags);
829 return ret;
830}
831
832/*
833 Dequeue URBs.
834*/
835static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
836 int status)
837{
838 struct isp116x *isp116x = hcd_to_isp116x(hcd);
839 struct usb_host_endpoint *hep;
840 struct isp116x_ep *ep, *ep_act;
841 unsigned long flags;
842 int rc;
843
844 spin_lock_irqsave(&isp116x->lock, flags);
845 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
846 if (rc)
847 goto done;
848
849 hep = urb->hcpriv;
850 ep = hep->hcpriv;
851 WARN_ON(hep != ep->hep);
852
853 /* In front of queue? */
854 if (ep->hep->urb_list.next == &urb->urb_list)
855 /* active? */
856 for (ep_act = isp116x->atl_active; ep_act;
857 ep_act = ep_act->active)
858 if (ep_act == ep) {
859 VDBG("dequeue, urb %p active; wait for irq\n",
860 urb);
861 urb = NULL;
862 break;
863 }
864
865 if (urb)
866 finish_request(isp116x, ep, urb, status);
867 done:
868 spin_unlock_irqrestore(&isp116x->lock, flags);
869 return rc;
870}
871
872static void isp116x_endpoint_disable(struct usb_hcd *hcd,
873 struct usb_host_endpoint *hep)
874{
875 int i;
876 struct isp116x_ep *ep = hep->hcpriv;
877
878 if (!ep)
879 return;
880
881 /* assume we'd just wait for the irq */
882 for (i = 0; i < 100 && !list_empty(&hep->urb_list); i++)
883 msleep(3);
884 if (!list_empty(&hep->urb_list))
885 WARNING("ep %p not empty?\n", ep);
886
887 kfree(ep);
888 hep->hcpriv = NULL;
889}
890
891static int isp116x_get_frame(struct usb_hcd *hcd)
892{
893 struct isp116x *isp116x = hcd_to_isp116x(hcd);
894 u32 fmnum;
895 unsigned long flags;
896
897 spin_lock_irqsave(&isp116x->lock, flags);
898 fmnum = isp116x_read_reg32(isp116x, HCFMNUM);
899 spin_unlock_irqrestore(&isp116x->lock, flags);
900 return (int)fmnum;
901}
902
903/*
904 Adapted from ohci-hub.c. Currently we don't support autosuspend.
905*/
906static int isp116x_hub_status_data(struct usb_hcd *hcd, char *buf)
907{
908 struct isp116x *isp116x = hcd_to_isp116x(hcd);
909 int ports, i, changed = 0;
910 unsigned long flags;
911
912 if (!HC_IS_RUNNING(hcd->state))
913 return -ESHUTDOWN;
914
915 /* Report no status change now, if we are scheduled to be
916 called later */
917 if (timer_pending(&hcd->rh_timer))
918 return 0;
919
920 ports = isp116x->rhdesca & RH_A_NDP;
921 spin_lock_irqsave(&isp116x->lock, flags);
922 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
923 if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC))
924 buf[0] = changed = 1;
925 else
926 buf[0] = 0;
927
928 for (i = 0; i < ports; i++) {
929 u32 status = isp116x_read_reg32(isp116x, i ? HCRHPORT2 : HCRHPORT1);
930
931 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
932 | RH_PS_OCIC | RH_PS_PRSC)) {
933 changed = 1;
934 buf[0] |= 1 << (i + 1);
935 }
936 }
937 spin_unlock_irqrestore(&isp116x->lock, flags);
938 return changed;
939}
940
941static void isp116x_hub_descriptor(struct isp116x *isp116x,
942 struct usb_hub_descriptor *desc)
943{
944 u32 reg = isp116x->rhdesca;
945
946 desc->bDescriptorType = 0x29;
947 desc->bDescLength = 9;
948 desc->bHubContrCurrent = 0;
949 desc->bNbrPorts = (u8) (reg & 0x3);
950 /* Power switching, device type, overcurrent. */
951 desc->wHubCharacteristics = cpu_to_le16((u16) ((reg >> 8) & 0x1f));
952 desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff);
953 /* ports removable, and legacy PortPwrCtrlMask */
954 desc->u.hs.DeviceRemovable[0] = 0;
955 desc->u.hs.DeviceRemovable[1] = ~0;
956}
957
958/* Perform reset of a given port.
959 It would be great to just start the reset and let the
960 USB core to clear the reset in due time. However,
961 root hub ports should be reset for at least 50 ms, while
962 our chip stays in reset for about 10 ms. I.e., we must
963 repeatedly reset it ourself here.
964*/
965static inline void root_port_reset(struct isp116x *isp116x, unsigned port)
966{
967 u32 tmp;
968 unsigned long flags, t;
969
970 /* Root hub reset should be 50 ms, but some devices
971 want it even longer. */
972 t = jiffies + msecs_to_jiffies(100);
973
974 while (time_before(jiffies, t)) {
975 spin_lock_irqsave(&isp116x->lock, flags);
976 /* spin until any current reset finishes */
977 for (;;) {
978 tmp = isp116x_read_reg32(isp116x, port ?
979 HCRHPORT2 : HCRHPORT1);
980 if (!(tmp & RH_PS_PRS))
981 break;
982 udelay(500);
983 }
984 /* Don't reset a disconnected port */
985 if (!(tmp & RH_PS_CCS)) {
986 spin_unlock_irqrestore(&isp116x->lock, flags);
987 break;
988 }
989 /* Reset lasts 10ms (claims datasheet) */
990 isp116x_write_reg32(isp116x, port ? HCRHPORT2 :
991 HCRHPORT1, (RH_PS_PRS));
992 spin_unlock_irqrestore(&isp116x->lock, flags);
993 msleep(10);
994 }
995}
996
997/* Adapted from ohci-hub.c */
998static int isp116x_hub_control(struct usb_hcd *hcd,
999 u16 typeReq,
1000 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1001{
1002 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1003 int ret = 0;
1004 unsigned long flags;
1005 int ports = isp116x->rhdesca & RH_A_NDP;
1006 u32 tmp = 0;
1007
1008 switch (typeReq) {
1009 case ClearHubFeature:
1010 DBG("ClearHubFeature: ");
1011 switch (wValue) {
1012 case C_HUB_OVER_CURRENT:
1013 DBG("C_HUB_OVER_CURRENT\n");
1014 spin_lock_irqsave(&isp116x->lock, flags);
1015 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
1016 spin_unlock_irqrestore(&isp116x->lock, flags);
1017 case C_HUB_LOCAL_POWER:
1018 DBG("C_HUB_LOCAL_POWER\n");
1019 break;
1020 default:
1021 goto error;
1022 }
1023 break;
1024 case SetHubFeature:
1025 DBG("SetHubFeature: ");
1026 switch (wValue) {
1027 case C_HUB_OVER_CURRENT:
1028 case C_HUB_LOCAL_POWER:
1029 DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
1030 break;
1031 default:
1032 goto error;
1033 }
1034 break;
1035 case GetHubDescriptor:
1036 DBG("GetHubDescriptor\n");
1037 isp116x_hub_descriptor(isp116x,
1038 (struct usb_hub_descriptor *)buf);
1039 break;
1040 case GetHubStatus:
1041 DBG("GetHubStatus\n");
1042 *(__le32 *) buf = 0;
1043 break;
1044 case GetPortStatus:
1045 DBG("GetPortStatus\n");
1046 if (!wIndex || wIndex > ports)
1047 goto error;
1048 spin_lock_irqsave(&isp116x->lock, flags);
1049 tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
1050 spin_unlock_irqrestore(&isp116x->lock, flags);
1051 *(__le32 *) buf = cpu_to_le32(tmp);
1052 DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp);
1053 break;
1054 case ClearPortFeature:
1055 DBG("ClearPortFeature: ");
1056 if (!wIndex || wIndex > ports)
1057 goto error;
1058 wIndex--;
1059
1060 switch (wValue) {
1061 case USB_PORT_FEAT_ENABLE:
1062 DBG("USB_PORT_FEAT_ENABLE\n");
1063 tmp = RH_PS_CCS;
1064 break;
1065 case USB_PORT_FEAT_C_ENABLE:
1066 DBG("USB_PORT_FEAT_C_ENABLE\n");
1067 tmp = RH_PS_PESC;
1068 break;
1069 case USB_PORT_FEAT_SUSPEND:
1070 DBG("USB_PORT_FEAT_SUSPEND\n");
1071 tmp = RH_PS_POCI;
1072 break;
1073 case USB_PORT_FEAT_C_SUSPEND:
1074 DBG("USB_PORT_FEAT_C_SUSPEND\n");
1075 tmp = RH_PS_PSSC;
1076 break;
1077 case USB_PORT_FEAT_POWER:
1078 DBG("USB_PORT_FEAT_POWER\n");
1079 tmp = RH_PS_LSDA;
1080 break;
1081 case USB_PORT_FEAT_C_CONNECTION:
1082 DBG("USB_PORT_FEAT_C_CONNECTION\n");
1083 tmp = RH_PS_CSC;
1084 break;
1085 case USB_PORT_FEAT_C_OVER_CURRENT:
1086 DBG("USB_PORT_FEAT_C_OVER_CURRENT\n");
1087 tmp = RH_PS_OCIC;
1088 break;
1089 case USB_PORT_FEAT_C_RESET:
1090 DBG("USB_PORT_FEAT_C_RESET\n");
1091 tmp = RH_PS_PRSC;
1092 break;
1093 default:
1094 goto error;
1095 }
1096 spin_lock_irqsave(&isp116x->lock, flags);
1097 isp116x_write_reg32(isp116x, wIndex
1098 ? HCRHPORT2 : HCRHPORT1, tmp);
1099 spin_unlock_irqrestore(&isp116x->lock, flags);
1100 break;
1101 case SetPortFeature:
1102 DBG("SetPortFeature: ");
1103 if (!wIndex || wIndex > ports)
1104 goto error;
1105 wIndex--;
1106 switch (wValue) {
1107 case USB_PORT_FEAT_SUSPEND:
1108 DBG("USB_PORT_FEAT_SUSPEND\n");
1109 spin_lock_irqsave(&isp116x->lock, flags);
1110 isp116x_write_reg32(isp116x, wIndex
1111 ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS);
1112 spin_unlock_irqrestore(&isp116x->lock, flags);
1113 break;
1114 case USB_PORT_FEAT_POWER:
1115 DBG("USB_PORT_FEAT_POWER\n");
1116 spin_lock_irqsave(&isp116x->lock, flags);
1117 isp116x_write_reg32(isp116x, wIndex
1118 ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS);
1119 spin_unlock_irqrestore(&isp116x->lock, flags);
1120 break;
1121 case USB_PORT_FEAT_RESET:
1122 DBG("USB_PORT_FEAT_RESET\n");
1123 root_port_reset(isp116x, wIndex);
1124 break;
1125 default:
1126 goto error;
1127 }
1128 break;
1129
1130 default:
1131 error:
1132 /* "protocol stall" on error */
1133 DBG("PROTOCOL STALL\n");
1134 ret = -EPIPE;
1135 }
1136 return ret;
1137}
1138
1139/*-----------------------------------------------------------------*/
1140
1141#ifdef CONFIG_DEBUG_FS
1142
1143static void dump_irq(struct seq_file *s, char *label, u16 mask)
1144{
1145 seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask,
1146 mask & HCuPINT_CLKRDY ? " clkrdy" : "",
1147 mask & HCuPINT_SUSP ? " susp" : "",
1148 mask & HCuPINT_OPR ? " opr" : "",
1149 mask & HCuPINT_AIIEOT ? " eot" : "",
1150 mask & HCuPINT_ATL ? " atl" : "",
1151 mask & HCuPINT_SOF ? " sof" : "");
1152}
1153
1154static void dump_int(struct seq_file *s, char *label, u32 mask)
1155{
1156 seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask,
1157 mask & HCINT_MIE ? " MIE" : "",
1158 mask & HCINT_RHSC ? " rhsc" : "",
1159 mask & HCINT_FNO ? " fno" : "",
1160 mask & HCINT_UE ? " ue" : "",
1161 mask & HCINT_RD ? " rd" : "",
1162 mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : "");
1163}
1164
1165static int isp116x_show_dbg(struct seq_file *s, void *unused)
1166{
1167 struct isp116x *isp116x = s->private;
1168
1169 seq_printf(s, "%s\n%s version %s\n",
1170 isp116x_to_hcd(isp116x)->product_desc, hcd_name,
1171 DRIVER_VERSION);
1172
1173 if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) {
1174 seq_printf(s, "HCD is suspended\n");
1175 return 0;
1176 }
1177 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) {
1178 seq_printf(s, "HCD not running\n");
1179 return 0;
1180 }
1181
1182 spin_lock_irq(&isp116x->lock);
1183 dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB));
1184 dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT));
1185 dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB));
1186 dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT));
1187 isp116x_show_regs_seq(isp116x, s);
1188 spin_unlock_irq(&isp116x->lock);
1189 seq_printf(s, "\n");
1190
1191 return 0;
1192}
1193
1194static int isp116x_open_seq(struct inode *inode, struct file *file)
1195{
1196 return single_open(file, isp116x_show_dbg, inode->i_private);
1197}
1198
1199static const struct file_operations isp116x_debug_fops = {
1200 .open = isp116x_open_seq,
1201 .read = seq_read,
1202 .llseek = seq_lseek,
1203 .release = single_release,
1204};
1205
1206static int create_debug_file(struct isp116x *isp116x)
1207{
1208 isp116x->dentry = debugfs_create_file(hcd_name,
1209 S_IRUGO, NULL, isp116x,
1210 &isp116x_debug_fops);
1211 if (!isp116x->dentry)
1212 return -ENOMEM;
1213 return 0;
1214}
1215
1216static void remove_debug_file(struct isp116x *isp116x)
1217{
1218 debugfs_remove(isp116x->dentry);
1219}
1220
1221#else
1222
1223#define create_debug_file(d) 0
1224#define remove_debug_file(d) do{}while(0)
1225
1226#endif /* CONFIG_DEBUG_FS */
1227
1228/*-----------------------------------------------------------------*/
1229
1230/*
1231 Software reset - can be called from any contect.
1232*/
1233static int isp116x_sw_reset(struct isp116x *isp116x)
1234{
1235 int retries = 15;
1236 unsigned long flags;
1237 int ret = 0;
1238
1239 spin_lock_irqsave(&isp116x->lock, flags);
1240 isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
1241 isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
1242 while (--retries) {
1243 /* It usually resets within 1 ms */
1244 mdelay(1);
1245 if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
1246 break;
1247 }
1248 if (!retries) {
1249 ERR("Software reset timeout\n");
1250 ret = -ETIME;
1251 }
1252 spin_unlock_irqrestore(&isp116x->lock, flags);
1253 return ret;
1254}
1255
1256static int isp116x_reset(struct usb_hcd *hcd)
1257{
1258 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1259 unsigned long t;
1260 u16 clkrdy = 0;
1261 int ret, timeout = 15 /* ms */ ;
1262
1263 ret = isp116x_sw_reset(isp116x);
1264 if (ret)
1265 return ret;
1266
1267 t = jiffies + msecs_to_jiffies(timeout);
1268 while (time_before_eq(jiffies, t)) {
1269 msleep(4);
1270 spin_lock_irq(&isp116x->lock);
1271 clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
1272 spin_unlock_irq(&isp116x->lock);
1273 if (clkrdy)
1274 break;
1275 }
1276 if (!clkrdy) {
1277 ERR("Clock not ready after %dms\n", timeout);
1278 /* After sw_reset the clock won't report to be ready, if
1279 H_WAKEUP pin is high. */
1280 ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
1281 ret = -ENODEV;
1282 }
1283 return ret;
1284}
1285
1286static void isp116x_stop(struct usb_hcd *hcd)
1287{
1288 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1289 unsigned long flags;
1290 u32 val;
1291
1292 spin_lock_irqsave(&isp116x->lock, flags);
1293 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1294
1295 /* Switch off ports' power, some devices don't come up
1296 after next 'insmod' without this */
1297 val = isp116x_read_reg32(isp116x, HCRHDESCA);
1298 val &= ~(RH_A_NPS | RH_A_PSM);
1299 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1300 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
1301 spin_unlock_irqrestore(&isp116x->lock, flags);
1302
1303 isp116x_sw_reset(isp116x);
1304}
1305
1306/*
1307 Configure the chip. The chip must be successfully reset by now.
1308*/
1309static int isp116x_start(struct usb_hcd *hcd)
1310{
1311 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1312 struct isp116x_platform_data *board = isp116x->board;
1313 u32 val;
1314 unsigned long flags;
1315
1316 spin_lock_irqsave(&isp116x->lock, flags);
1317
1318 /* clear interrupt status and disable all interrupt sources */
1319 isp116x_write_reg16(isp116x, HCuPINT, 0xff);
1320 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1321
1322 val = isp116x_read_reg16(isp116x, HCCHIPID);
1323 if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
1324 ERR("Invalid chip ID %04x\n", val);
1325 spin_unlock_irqrestore(&isp116x->lock, flags);
1326 return -ENODEV;
1327 }
1328
1329 /* To be removed in future */
1330 hcd->uses_new_polling = 1;
1331
1332 isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
1333 isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);
1334
1335 /* ----- HW conf */
1336 val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
1337 if (board->sel15Kres)
1338 val |= HCHWCFG_15KRSEL;
1339 /* Remote wakeup won't work without working clock */
1340 if (board->remote_wakeup_enable)
1341 val |= HCHWCFG_CLKNOTSTOP;
1342 if (board->oc_enable)
1343 val |= HCHWCFG_ANALOG_OC;
1344 if (board->int_act_high)
1345 val |= HCHWCFG_INT_POL;
1346 if (board->int_edge_triggered)
1347 val |= HCHWCFG_INT_TRIGGER;
1348 isp116x_write_reg16(isp116x, HCHWCFG, val);
1349
1350 /* ----- Root hub conf */
1351 val = (25 << 24) & RH_A_POTPGT;
1352 /* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
1353 be always set. Yet, instead, we request individual port
1354 power switching. */
1355 val |= RH_A_PSM;
1356 /* Report overcurrent per port */
1357 val |= RH_A_OCPM;
1358 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1359 isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);
1360
1361 val = RH_B_PPCM;
1362 isp116x_write_reg32(isp116x, HCRHDESCB, val);
1363 isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);
1364
1365 val = 0;
1366 if (board->remote_wakeup_enable) {
1367 if (!device_can_wakeup(hcd->self.controller))
1368 device_init_wakeup(hcd->self.controller, 1);
1369 val |= RH_HS_DRWE;
1370 }
1371 isp116x_write_reg32(isp116x, HCRHSTATUS, val);
1372 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
1373
1374 isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);
1375
1376 hcd->state = HC_STATE_RUNNING;
1377
1378 /* Set up interrupts */
1379 isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE;
1380 if (board->remote_wakeup_enable)
1381 isp116x->intenb |= HCINT_RD;
1382 isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */
1383 isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb);
1384 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
1385
1386 /* Go operational */
1387 val = HCCONTROL_USB_OPER;
1388 if (board->remote_wakeup_enable)
1389 val |= HCCONTROL_RWE;
1390 isp116x_write_reg32(isp116x, HCCONTROL, val);
1391
1392 /* Disable ports to avoid race in device enumeration */
1393 isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
1394 isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);
1395
1396 isp116x_show_regs_log(isp116x);
1397 spin_unlock_irqrestore(&isp116x->lock, flags);
1398 return 0;
1399}
1400
1401#ifdef CONFIG_PM
1402
1403static int isp116x_bus_suspend(struct usb_hcd *hcd)
1404{
1405 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1406 unsigned long flags;
1407 u32 val;
1408 int ret = 0;
1409
1410 spin_lock_irqsave(&isp116x->lock, flags);
1411 val = isp116x_read_reg32(isp116x, HCCONTROL);
1412
1413 switch (val & HCCONTROL_HCFS) {
1414 case HCCONTROL_USB_OPER:
1415 spin_unlock_irqrestore(&isp116x->lock, flags);
1416 val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
1417 val |= HCCONTROL_USB_SUSPEND;
1418 if (hcd->self.root_hub->do_remote_wakeup)
1419 val |= HCCONTROL_RWE;
1420 /* Wait for usb transfers to finish */
1421 msleep(2);
1422 spin_lock_irqsave(&isp116x->lock, flags);
1423 isp116x_write_reg32(isp116x, HCCONTROL, val);
1424 spin_unlock_irqrestore(&isp116x->lock, flags);
1425 /* Wait for devices to suspend */
1426 msleep(5);
1427 break;
1428 case HCCONTROL_USB_RESUME:
1429 isp116x_write_reg32(isp116x, HCCONTROL,
1430 (val & ~HCCONTROL_HCFS) |
1431 HCCONTROL_USB_RESET);
1432 case HCCONTROL_USB_RESET:
1433 ret = -EBUSY;
1434 default: /* HCCONTROL_USB_SUSPEND */
1435 spin_unlock_irqrestore(&isp116x->lock, flags);
1436 break;
1437 }
1438
1439 return ret;
1440}
1441
1442static int isp116x_bus_resume(struct usb_hcd *hcd)
1443{
1444 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1445 u32 val;
1446
1447 msleep(5);
1448 spin_lock_irq(&isp116x->lock);
1449
1450 val = isp116x_read_reg32(isp116x, HCCONTROL);
1451 switch (val & HCCONTROL_HCFS) {
1452 case HCCONTROL_USB_SUSPEND:
1453 val &= ~HCCONTROL_HCFS;
1454 val |= HCCONTROL_USB_RESUME;
1455 isp116x_write_reg32(isp116x, HCCONTROL, val);
1456 case HCCONTROL_USB_RESUME:
1457 break;
1458 case HCCONTROL_USB_OPER:
1459 spin_unlock_irq(&isp116x->lock);
1460 return 0;
1461 default:
1462 /* HCCONTROL_USB_RESET: this may happen, when during
1463 suspension the HC lost power. Reinitialize completely */
1464 spin_unlock_irq(&isp116x->lock);
1465 DBG("Chip has been reset while suspended. Reinit from scratch.\n");
1466 isp116x_reset(hcd);
1467 isp116x_start(hcd);
1468 isp116x_hub_control(hcd, SetPortFeature,
1469 USB_PORT_FEAT_POWER, 1, NULL, 0);
1470 if ((isp116x->rhdesca & RH_A_NDP) == 2)
1471 isp116x_hub_control(hcd, SetPortFeature,
1472 USB_PORT_FEAT_POWER, 2, NULL, 0);
1473 return 0;
1474 }
1475
1476 val = isp116x->rhdesca & RH_A_NDP;
1477 while (val--) {
1478 u32 stat =
1479 isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1);
1480 /* force global, not selective, resume */
1481 if (!(stat & RH_PS_PSS))
1482 continue;
1483 DBG("%s: Resuming port %d\n", __func__, val);
1484 isp116x_write_reg32(isp116x, RH_PS_POCI, val
1485 ? HCRHPORT2 : HCRHPORT1);
1486 }
1487 spin_unlock_irq(&isp116x->lock);
1488
1489 hcd->state = HC_STATE_RESUMING;
1490 msleep(20);
1491
1492 /* Go operational */
1493 spin_lock_irq(&isp116x->lock);
1494 val = isp116x_read_reg32(isp116x, HCCONTROL);
1495 isp116x_write_reg32(isp116x, HCCONTROL,
1496 (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER);
1497 spin_unlock_irq(&isp116x->lock);
1498 hcd->state = HC_STATE_RUNNING;
1499
1500 return 0;
1501}
1502
1503#else
1504
1505#define isp116x_bus_suspend NULL
1506#define isp116x_bus_resume NULL
1507
1508#endif
1509
1510static struct hc_driver isp116x_hc_driver = {
1511 .description = hcd_name,
1512 .product_desc = "ISP116x Host Controller",
1513 .hcd_priv_size = sizeof(struct isp116x),
1514
1515 .irq = isp116x_irq,
1516 .flags = HCD_USB11,
1517
1518 .reset = isp116x_reset,
1519 .start = isp116x_start,
1520 .stop = isp116x_stop,
1521
1522 .urb_enqueue = isp116x_urb_enqueue,
1523 .urb_dequeue = isp116x_urb_dequeue,
1524 .endpoint_disable = isp116x_endpoint_disable,
1525
1526 .get_frame_number = isp116x_get_frame,
1527
1528 .hub_status_data = isp116x_hub_status_data,
1529 .hub_control = isp116x_hub_control,
1530 .bus_suspend = isp116x_bus_suspend,
1531 .bus_resume = isp116x_bus_resume,
1532};
1533
1534/*----------------------------------------------------------------*/
1535
1536static int isp116x_remove(struct platform_device *pdev)
1537{
1538 struct usb_hcd *hcd = platform_get_drvdata(pdev);
1539 struct isp116x *isp116x;
1540 struct resource *res;
1541
1542 if (!hcd)
1543 return 0;
1544 isp116x = hcd_to_isp116x(hcd);
1545 remove_debug_file(isp116x);
1546 usb_remove_hcd(hcd);
1547
1548 iounmap(isp116x->data_reg);
1549 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1550 release_mem_region(res->start, 2);
1551 iounmap(isp116x->addr_reg);
1552 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1553 release_mem_region(res->start, 2);
1554
1555 usb_put_hcd(hcd);
1556 return 0;
1557}
1558
1559static int isp116x_probe(struct platform_device *pdev)
1560{
1561 struct usb_hcd *hcd;
1562 struct isp116x *isp116x;
1563 struct resource *addr, *data, *ires;
1564 void __iomem *addr_reg;
1565 void __iomem *data_reg;
1566 int irq;
1567 int ret = 0;
1568 unsigned long irqflags;
1569
1570 if (usb_disabled())
1571 return -ENODEV;
1572
1573 if (pdev->num_resources < 3) {
1574 ret = -ENODEV;
1575 goto err1;
1576 }
1577
1578 data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1579 addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1580 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1581
1582 if (!addr || !data || !ires) {
1583 ret = -ENODEV;
1584 goto err1;
1585 }
1586
1587 irq = ires->start;
1588 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1589
1590 if (pdev->dev.dma_mask) {
1591 DBG("DMA not supported\n");
1592 ret = -EINVAL;
1593 goto err1;
1594 }
1595
1596 if (!request_mem_region(addr->start, 2, hcd_name)) {
1597 ret = -EBUSY;
1598 goto err1;
1599 }
1600 addr_reg = ioremap(addr->start, resource_size(addr));
1601 if (addr_reg == NULL) {
1602 ret = -ENOMEM;
1603 goto err2;
1604 }
1605 if (!request_mem_region(data->start, 2, hcd_name)) {
1606 ret = -EBUSY;
1607 goto err3;
1608 }
1609 data_reg = ioremap(data->start, resource_size(data));
1610 if (data_reg == NULL) {
1611 ret = -ENOMEM;
1612 goto err4;
1613 }
1614
1615 /* allocate and initialize hcd */
1616 hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev));
1617 if (!hcd) {
1618 ret = -ENOMEM;
1619 goto err5;
1620 }
1621 /* this rsrc_start is bogus */
1622 hcd->rsrc_start = addr->start;
1623 isp116x = hcd_to_isp116x(hcd);
1624 isp116x->data_reg = data_reg;
1625 isp116x->addr_reg = addr_reg;
1626 spin_lock_init(&isp116x->lock);
1627 INIT_LIST_HEAD(&isp116x->async);
1628 isp116x->board = dev_get_platdata(&pdev->dev);
1629
1630 if (!isp116x->board) {
1631 ERR("Platform data structure not initialized\n");
1632 ret = -ENODEV;
1633 goto err6;
1634 }
1635 if (isp116x_check_platform_delay(isp116x)) {
1636 ERR("USE_PLATFORM_DELAY defined, but delay function not "
1637 "implemented.\n");
1638 ERR("See comments in drivers/usb/host/isp116x-hcd.c\n");
1639 ret = -ENODEV;
1640 goto err6;
1641 }
1642
1643 ret = usb_add_hcd(hcd, irq, irqflags);
1644 if (ret)
1645 goto err6;
1646
1647 device_wakeup_enable(hcd->self.controller);
1648
1649 ret = create_debug_file(isp116x);
1650 if (ret) {
1651 ERR("Couldn't create debugfs entry\n");
1652 goto err7;
1653 }
1654
1655 return 0;
1656
1657 err7:
1658 usb_remove_hcd(hcd);
1659 err6:
1660 usb_put_hcd(hcd);
1661 err5:
1662 iounmap(data_reg);
1663 err4:
1664 release_mem_region(data->start, 2);
1665 err3:
1666 iounmap(addr_reg);
1667 err2:
1668 release_mem_region(addr->start, 2);
1669 err1:
1670 ERR("init error, %d\n", ret);
1671 return ret;
1672}
1673
1674#ifdef CONFIG_PM
1675/*
1676 Suspend of platform device
1677*/
1678static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
1679{
1680 VDBG("%s: state %x\n", __func__, state.event);
1681 return 0;
1682}
1683
1684/*
1685 Resume platform device
1686*/
1687static int isp116x_resume(struct platform_device *dev)
1688{
1689 VDBG("%s\n", __func__);
1690 return 0;
1691}
1692
1693#else
1694
1695#define isp116x_suspend NULL
1696#define isp116x_resume NULL
1697
1698#endif
1699
1700/* work with hotplug and coldplug */
1701MODULE_ALIAS("platform:isp116x-hcd");
1702
1703static struct platform_driver isp116x_driver = {
1704 .probe = isp116x_probe,
1705 .remove = isp116x_remove,
1706 .suspend = isp116x_suspend,
1707 .resume = isp116x_resume,
1708 .driver = {
1709 .name = hcd_name,
1710 .owner = THIS_MODULE,
1711 },
1712};
1713
1714module_platform_driver(isp116x_driver);