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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 load = isp116x->load[index];
504 if (load) {
505 /* Bring all int transfers for this frame
506 into the active queue */
507 isp116x->atl_active = last_ep =
508 isp116x->periodic[index];
509 while (last_ep->next)
510 last_ep = (last_ep->active = last_ep->next);
511 last_ep->active = NULL;
512 }
513 }
514
515 /* Schedule control/bulk transfers */
516 list_for_each_entry(ep, &isp116x->async, schedule) {
517 urb = container_of(ep->hep->urb_list.next,
518 struct urb, urb_list);
519 speed = urb->dev->speed;
520 byte_time = speed == USB_SPEED_LOW
521 ? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED;
522
523 if (ep->nextpid == USB_PID_SETUP) {
524 len = sizeof(struct usb_ctrlrequest);
525 } else if (ep->nextpid == USB_PID_ACK) {
526 len = 0;
527 } else {
528 /* Find current free length ... */
529 len = (MAX_LOAD_LIMIT - load) / byte_time;
530
531 /* ... then limit it to configured max size ... */
532 len = min(len, speed == USB_SPEED_LOW ?
533 MAX_TRANSFER_SIZE_LOWSPEED :
534 MAX_TRANSFER_SIZE_FULLSPEED);
535
536 /* ... and finally cut to the multiple of MaxPacketSize,
537 or to the real length if there's enough room. */
538 if (len <
539 (urb->transfer_buffer_length -
540 urb->actual_length)) {
541 len -= len % ep->maxpacket;
542 if (!len)
543 continue;
544 } else
545 len = urb->transfer_buffer_length -
546 urb->actual_length;
547 BUG_ON(len < 0);
548 }
549
550 load += len * byte_time;
551 if (load > MAX_LOAD_LIMIT)
552 break;
553
554 ep->active = NULL;
555 ep->length = len;
556 if (last_ep)
557 last_ep->active = ep;
558 else
559 isp116x->atl_active = ep;
560 last_ep = ep;
561 }
562
563 /* Avoid starving of endpoints */
564 if ((&isp116x->async)->next != (&isp116x->async)->prev)
565 list_move(&isp116x->async, (&isp116x->async)->next);
566
567 if (isp116x->atl_active) {
568 preproc_atl_queue(isp116x);
569 pack_fifo(isp116x);
570 }
571}
572
573/*
574 Finish the processed transfers
575*/
576static void finish_atl_transfers(struct isp116x *isp116x)
577{
578 if (!isp116x->atl_active)
579 return;
580 /* Fifo not ready? */
581 if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE))
582 return;
583
584 atomic_inc(&isp116x->atl_finishing);
585 unpack_fifo(isp116x);
586 postproc_atl_queue(isp116x);
587 atomic_dec(&isp116x->atl_finishing);
588}
589
590static irqreturn_t isp116x_irq(struct usb_hcd *hcd)
591{
592 struct isp116x *isp116x = hcd_to_isp116x(hcd);
593 u16 irqstat;
594 irqreturn_t ret = IRQ_NONE;
595
596 spin_lock(&isp116x->lock);
597 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
598 irqstat = isp116x_read_reg16(isp116x, HCuPINT);
599 isp116x_write_reg16(isp116x, HCuPINT, irqstat);
600
601 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
602 ret = IRQ_HANDLED;
603 finish_atl_transfers(isp116x);
604 }
605
606 if (irqstat & HCuPINT_OPR) {
607 u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT);
608 isp116x_write_reg32(isp116x, HCINTSTAT, intstat);
609 if (intstat & HCINT_UE) {
610 ERR("Unrecoverable error, HC is dead!\n");
611 /* IRQ's are off, we do no DMA,
612 perfectly ready to die ... */
613 hcd->state = HC_STATE_HALT;
614 usb_hc_died(hcd);
615 ret = IRQ_HANDLED;
616 goto done;
617 }
618 if (intstat & HCINT_RHSC)
619 /* When root hub or any of its ports is going
620 to come out of suspend, it may take more
621 than 10ms for status bits to stabilize. */
622 mod_timer(&hcd->rh_timer, jiffies
623 + msecs_to_jiffies(20) + 1);
624 if (intstat & HCINT_RD) {
625 DBG("---- remote wakeup\n");
626 usb_hcd_resume_root_hub(hcd);
627 }
628 irqstat &= ~HCuPINT_OPR;
629 ret = IRQ_HANDLED;
630 }
631
632 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
633 start_atl_transfers(isp116x);
634 }
635
636 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
637 done:
638 spin_unlock(&isp116x->lock);
639 return ret;
640}
641
642/*-----------------------------------------------------------------*/
643
644/* usb 1.1 says max 90% of a frame is available for periodic transfers.
645 * this driver doesn't promise that much since it's got to handle an
646 * IRQ per packet; irq handling latencies also use up that time.
647 */
648
649/* out of 1000 us */
650#define MAX_PERIODIC_LOAD 600
651static int balance(struct isp116x *isp116x, u16 period, u16 load)
652{
653 int i, branch = -ENOSPC;
654
655 /* search for the least loaded schedule branch of that period
656 which has enough bandwidth left unreserved. */
657 for (i = 0; i < period; i++) {
658 if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) {
659 int j;
660
661 for (j = i; j < PERIODIC_SIZE; j += period) {
662 if ((isp116x->load[j] + load)
663 > MAX_PERIODIC_LOAD)
664 break;
665 }
666 if (j < PERIODIC_SIZE)
667 continue;
668 branch = i;
669 }
670 }
671 return branch;
672}
673
674/* NB! ALL the code above this point runs with isp116x->lock
675 held, irqs off
676*/
677
678/*-----------------------------------------------------------------*/
679
680static int isp116x_urb_enqueue(struct usb_hcd *hcd,
681 struct urb *urb,
682 gfp_t mem_flags)
683{
684 struct isp116x *isp116x = hcd_to_isp116x(hcd);
685 struct usb_device *udev = urb->dev;
686 unsigned int pipe = urb->pipe;
687 int is_out = !usb_pipein(pipe);
688 int type = usb_pipetype(pipe);
689 int epnum = usb_pipeendpoint(pipe);
690 struct usb_host_endpoint *hep = urb->ep;
691 struct isp116x_ep *ep = NULL;
692 unsigned long flags;
693 int i;
694 int ret = 0;
695
696 urb_dbg(urb, "Enqueue");
697
698 if (type == PIPE_ISOCHRONOUS) {
699 ERR("Isochronous transfers not supported\n");
700 urb_dbg(urb, "Refused to enqueue");
701 return -ENXIO;
702 }
703 /* avoid all allocations within spinlocks: request or endpoint */
704 if (!hep->hcpriv) {
705 ep = kzalloc(sizeof *ep, mem_flags);
706 if (!ep)
707 return -ENOMEM;
708 }
709
710 spin_lock_irqsave(&isp116x->lock, flags);
711 if (!HC_IS_RUNNING(hcd->state)) {
712 kfree(ep);
713 ret = -ENODEV;
714 goto fail_not_linked;
715 }
716 ret = usb_hcd_link_urb_to_ep(hcd, urb);
717 if (ret) {
718 kfree(ep);
719 goto fail_not_linked;
720 }
721
722 if (hep->hcpriv)
723 ep = hep->hcpriv;
724 else {
725 INIT_LIST_HEAD(&ep->schedule);
726 ep->udev = udev;
727 ep->epnum = epnum;
728 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
729 usb_settoggle(udev, epnum, is_out, 0);
730
731 if (type == PIPE_CONTROL) {
732 ep->nextpid = USB_PID_SETUP;
733 } else if (is_out) {
734 ep->nextpid = USB_PID_OUT;
735 } else {
736 ep->nextpid = USB_PID_IN;
737 }
738
739 if (urb->interval) {
740 /*
741 With INT URBs submitted, the driver works with SOF
742 interrupt enabled and ATL interrupt disabled. After
743 the PTDs are written to fifo ram, the chip starts
744 fifo processing and usb transfers after the next
745 SOF and continues until the transfers are finished
746 (succeeded or failed) or the frame ends. Therefore,
747 the transfers occur only in every second frame,
748 while fifo reading/writing and data processing
749 occur in every other second frame. */
750 if (urb->interval < 2)
751 urb->interval = 2;
752 if (urb->interval > 2 * PERIODIC_SIZE)
753 urb->interval = 2 * PERIODIC_SIZE;
754 ep->period = urb->interval >> 1;
755 ep->branch = PERIODIC_SIZE;
756 ep->load = usb_calc_bus_time(udev->speed,
757 !is_out,
758 (type == PIPE_ISOCHRONOUS),
759 usb_maxpacket(udev, pipe,
760 is_out)) /
761 1000;
762 }
763 hep->hcpriv = ep;
764 ep->hep = hep;
765 }
766
767 /* maybe put endpoint into schedule */
768 switch (type) {
769 case PIPE_CONTROL:
770 case PIPE_BULK:
771 if (list_empty(&ep->schedule))
772 list_add_tail(&ep->schedule, &isp116x->async);
773 break;
774 case PIPE_INTERRUPT:
775 urb->interval = ep->period;
776 ep->length = min_t(u32, ep->maxpacket,
777 urb->transfer_buffer_length);
778
779 /* urb submitted for already existing endpoint */
780 if (ep->branch < PERIODIC_SIZE)
781 break;
782
783 ep->branch = ret = balance(isp116x, ep->period, ep->load);
784 if (ret < 0)
785 goto fail;
786 ret = 0;
787
788 urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1))
789 + ep->branch;
790
791 /* sort each schedule branch by period (slow before fast)
792 to share the faster parts of the tree without needing
793 dummy/placeholder nodes */
794 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
795 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
796 struct isp116x_ep **prev = &isp116x->periodic[i];
797 struct isp116x_ep *here = *prev;
798
799 while (here && ep != here) {
800 if (ep->period > here->period)
801 break;
802 prev = &here->next;
803 here = *prev;
804 }
805 if (ep != here) {
806 ep->next = here;
807 *prev = ep;
808 }
809 isp116x->load[i] += ep->load;
810 }
811 hcd->self.bandwidth_allocated += ep->load / ep->period;
812
813 /* switch over to SOFint */
814 if (!isp116x->periodic_count++) {
815 isp116x->irqenb &= ~HCuPINT_ATL;
816 isp116x->irqenb |= HCuPINT_SOF;
817 isp116x_write_reg16(isp116x, HCuPINTENB,
818 isp116x->irqenb);
819 }
820 }
821
822 urb->hcpriv = hep;
823 start_atl_transfers(isp116x);
824
825 fail:
826 if (ret)
827 usb_hcd_unlink_urb_from_ep(hcd, urb);
828 fail_not_linked:
829 spin_unlock_irqrestore(&isp116x->lock, flags);
830 return ret;
831}
832
833/*
834 Dequeue URBs.
835*/
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 case C_HUB_LOCAL_POWER:
1022 DBG("C_HUB_LOCAL_POWER\n");
1023 break;
1024 default:
1025 goto error;
1026 }
1027 break;
1028 case SetHubFeature:
1029 DBG("SetHubFeature: ");
1030 switch (wValue) {
1031 case C_HUB_OVER_CURRENT:
1032 case C_HUB_LOCAL_POWER:
1033 DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
1034 break;
1035 default:
1036 goto error;
1037 }
1038 break;
1039 case GetHubDescriptor:
1040 DBG("GetHubDescriptor\n");
1041 isp116x_hub_descriptor(isp116x,
1042 (struct usb_hub_descriptor *)buf);
1043 break;
1044 case GetHubStatus:
1045 DBG("GetHubStatus\n");
1046 *(__le32 *) buf = 0;
1047 break;
1048 case GetPortStatus:
1049 DBG("GetPortStatus\n");
1050 if (!wIndex || wIndex > ports)
1051 goto error;
1052 spin_lock_irqsave(&isp116x->lock, flags);
1053 tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
1054 spin_unlock_irqrestore(&isp116x->lock, flags);
1055 *(__le32 *) buf = cpu_to_le32(tmp);
1056 DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp);
1057 break;
1058 case ClearPortFeature:
1059 DBG("ClearPortFeature: ");
1060 if (!wIndex || wIndex > ports)
1061 goto error;
1062 wIndex--;
1063
1064 switch (wValue) {
1065 case USB_PORT_FEAT_ENABLE:
1066 DBG("USB_PORT_FEAT_ENABLE\n");
1067 tmp = RH_PS_CCS;
1068 break;
1069 case USB_PORT_FEAT_C_ENABLE:
1070 DBG("USB_PORT_FEAT_C_ENABLE\n");
1071 tmp = RH_PS_PESC;
1072 break;
1073 case USB_PORT_FEAT_SUSPEND:
1074 DBG("USB_PORT_FEAT_SUSPEND\n");
1075 tmp = RH_PS_POCI;
1076 break;
1077 case USB_PORT_FEAT_C_SUSPEND:
1078 DBG("USB_PORT_FEAT_C_SUSPEND\n");
1079 tmp = RH_PS_PSSC;
1080 break;
1081 case USB_PORT_FEAT_POWER:
1082 DBG("USB_PORT_FEAT_POWER\n");
1083 tmp = RH_PS_LSDA;
1084 break;
1085 case USB_PORT_FEAT_C_CONNECTION:
1086 DBG("USB_PORT_FEAT_C_CONNECTION\n");
1087 tmp = RH_PS_CSC;
1088 break;
1089 case USB_PORT_FEAT_C_OVER_CURRENT:
1090 DBG("USB_PORT_FEAT_C_OVER_CURRENT\n");
1091 tmp = RH_PS_OCIC;
1092 break;
1093 case USB_PORT_FEAT_C_RESET:
1094 DBG("USB_PORT_FEAT_C_RESET\n");
1095 tmp = RH_PS_PRSC;
1096 break;
1097 default:
1098 goto error;
1099 }
1100 spin_lock_irqsave(&isp116x->lock, flags);
1101 isp116x_write_reg32(isp116x, wIndex
1102 ? HCRHPORT2 : HCRHPORT1, tmp);
1103 spin_unlock_irqrestore(&isp116x->lock, flags);
1104 break;
1105 case SetPortFeature:
1106 DBG("SetPortFeature: ");
1107 if (!wIndex || wIndex > ports)
1108 goto error;
1109 wIndex--;
1110 switch (wValue) {
1111 case USB_PORT_FEAT_SUSPEND:
1112 DBG("USB_PORT_FEAT_SUSPEND\n");
1113 spin_lock_irqsave(&isp116x->lock, flags);
1114 isp116x_write_reg32(isp116x, wIndex
1115 ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS);
1116 spin_unlock_irqrestore(&isp116x->lock, flags);
1117 break;
1118 case USB_PORT_FEAT_POWER:
1119 DBG("USB_PORT_FEAT_POWER\n");
1120 spin_lock_irqsave(&isp116x->lock, flags);
1121 isp116x_write_reg32(isp116x, wIndex
1122 ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS);
1123 spin_unlock_irqrestore(&isp116x->lock, flags);
1124 break;
1125 case USB_PORT_FEAT_RESET:
1126 DBG("USB_PORT_FEAT_RESET\n");
1127 root_port_reset(isp116x, wIndex);
1128 break;
1129 default:
1130 goto error;
1131 }
1132 break;
1133
1134 default:
1135 error:
1136 /* "protocol stall" on error */
1137 DBG("PROTOCOL STALL\n");
1138 ret = -EPIPE;
1139 }
1140 return ret;
1141}
1142
1143/*-----------------------------------------------------------------*/
1144
1145#ifdef CONFIG_DEBUG_FS
1146
1147static void dump_irq(struct seq_file *s, char *label, u16 mask)
1148{
1149 seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask,
1150 mask & HCuPINT_CLKRDY ? " clkrdy" : "",
1151 mask & HCuPINT_SUSP ? " susp" : "",
1152 mask & HCuPINT_OPR ? " opr" : "",
1153 mask & HCuPINT_AIIEOT ? " eot" : "",
1154 mask & HCuPINT_ATL ? " atl" : "",
1155 mask & HCuPINT_SOF ? " sof" : "");
1156}
1157
1158static void dump_int(struct seq_file *s, char *label, u32 mask)
1159{
1160 seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask,
1161 mask & HCINT_MIE ? " MIE" : "",
1162 mask & HCINT_RHSC ? " rhsc" : "",
1163 mask & HCINT_FNO ? " fno" : "",
1164 mask & HCINT_UE ? " ue" : "",
1165 mask & HCINT_RD ? " rd" : "",
1166 mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : "");
1167}
1168
1169static int isp116x_show_dbg(struct seq_file *s, void *unused)
1170{
1171 struct isp116x *isp116x = s->private;
1172
1173 seq_printf(s, "%s\n%s version %s\n",
1174 isp116x_to_hcd(isp116x)->product_desc, hcd_name,
1175 DRIVER_VERSION);
1176
1177 if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) {
1178 seq_printf(s, "HCD is suspended\n");
1179 return 0;
1180 }
1181 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) {
1182 seq_printf(s, "HCD not running\n");
1183 return 0;
1184 }
1185
1186 spin_lock_irq(&isp116x->lock);
1187 dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB));
1188 dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT));
1189 dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB));
1190 dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT));
1191 isp116x_show_regs_seq(isp116x, s);
1192 spin_unlock_irq(&isp116x->lock);
1193 seq_printf(s, "\n");
1194
1195 return 0;
1196}
1197
1198static int isp116x_open_seq(struct inode *inode, struct file *file)
1199{
1200 return single_open(file, isp116x_show_dbg, inode->i_private);
1201}
1202
1203static const struct file_operations isp116x_debug_fops = {
1204 .open = isp116x_open_seq,
1205 .read = seq_read,
1206 .llseek = seq_lseek,
1207 .release = single_release,
1208};
1209
1210static int create_debug_file(struct isp116x *isp116x)
1211{
1212 isp116x->dentry = debugfs_create_file(hcd_name,
1213 S_IRUGO, NULL, isp116x,
1214 &isp116x_debug_fops);
1215 if (!isp116x->dentry)
1216 return -ENOMEM;
1217 return 0;
1218}
1219
1220static void remove_debug_file(struct isp116x *isp116x)
1221{
1222 debugfs_remove(isp116x->dentry);
1223}
1224
1225#else
1226
1227#define create_debug_file(d) 0
1228#define remove_debug_file(d) do{}while(0)
1229
1230#endif /* CONFIG_DEBUG_FS */
1231
1232/*-----------------------------------------------------------------*/
1233
1234/*
1235 Software reset - can be called from any contect.
1236*/
1237static int isp116x_sw_reset(struct isp116x *isp116x)
1238{
1239 int retries = 15;
1240 unsigned long flags;
1241 int ret = 0;
1242
1243 spin_lock_irqsave(&isp116x->lock, flags);
1244 isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
1245 isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
1246 while (--retries) {
1247 /* It usually resets within 1 ms */
1248 mdelay(1);
1249 if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
1250 break;
1251 }
1252 if (!retries) {
1253 ERR("Software reset timeout\n");
1254 ret = -ETIME;
1255 }
1256 spin_unlock_irqrestore(&isp116x->lock, flags);
1257 return ret;
1258}
1259
1260static int isp116x_reset(struct usb_hcd *hcd)
1261{
1262 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1263 unsigned long t;
1264 u16 clkrdy = 0;
1265 int ret, timeout = 15 /* ms */ ;
1266
1267 ret = isp116x_sw_reset(isp116x);
1268 if (ret)
1269 return ret;
1270
1271 t = jiffies + msecs_to_jiffies(timeout);
1272 while (time_before_eq(jiffies, t)) {
1273 msleep(4);
1274 spin_lock_irq(&isp116x->lock);
1275 clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
1276 spin_unlock_irq(&isp116x->lock);
1277 if (clkrdy)
1278 break;
1279 }
1280 if (!clkrdy) {
1281 ERR("Clock not ready after %dms\n", timeout);
1282 /* After sw_reset the clock won't report to be ready, if
1283 H_WAKEUP pin is high. */
1284 ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
1285 ret = -ENODEV;
1286 }
1287 return ret;
1288}
1289
1290static void isp116x_stop(struct usb_hcd *hcd)
1291{
1292 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1293 unsigned long flags;
1294 u32 val;
1295
1296 spin_lock_irqsave(&isp116x->lock, flags);
1297 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1298
1299 /* Switch off ports' power, some devices don't come up
1300 after next 'insmod' without this */
1301 val = isp116x_read_reg32(isp116x, HCRHDESCA);
1302 val &= ~(RH_A_NPS | RH_A_PSM);
1303 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1304 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
1305 spin_unlock_irqrestore(&isp116x->lock, flags);
1306
1307 isp116x_sw_reset(isp116x);
1308}
1309
1310/*
1311 Configure the chip. The chip must be successfully reset by now.
1312*/
1313static int isp116x_start(struct usb_hcd *hcd)
1314{
1315 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1316 struct isp116x_platform_data *board = isp116x->board;
1317 u32 val;
1318 unsigned long flags;
1319
1320 spin_lock_irqsave(&isp116x->lock, flags);
1321
1322 /* clear interrupt status and disable all interrupt sources */
1323 isp116x_write_reg16(isp116x, HCuPINT, 0xff);
1324 isp116x_write_reg16(isp116x, HCuPINTENB, 0);
1325
1326 val = isp116x_read_reg16(isp116x, HCCHIPID);
1327 if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
1328 ERR("Invalid chip ID %04x\n", val);
1329 spin_unlock_irqrestore(&isp116x->lock, flags);
1330 return -ENODEV;
1331 }
1332
1333 /* To be removed in future */
1334 hcd->uses_new_polling = 1;
1335
1336 isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
1337 isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);
1338
1339 /* ----- HW conf */
1340 val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
1341 if (board->sel15Kres)
1342 val |= HCHWCFG_15KRSEL;
1343 /* Remote wakeup won't work without working clock */
1344 if (board->remote_wakeup_enable)
1345 val |= HCHWCFG_CLKNOTSTOP;
1346 if (board->oc_enable)
1347 val |= HCHWCFG_ANALOG_OC;
1348 if (board->int_act_high)
1349 val |= HCHWCFG_INT_POL;
1350 if (board->int_edge_triggered)
1351 val |= HCHWCFG_INT_TRIGGER;
1352 isp116x_write_reg16(isp116x, HCHWCFG, val);
1353
1354 /* ----- Root hub conf */
1355 val = (25 << 24) & RH_A_POTPGT;
1356 /* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
1357 be always set. Yet, instead, we request individual port
1358 power switching. */
1359 val |= RH_A_PSM;
1360 /* Report overcurrent per port */
1361 val |= RH_A_OCPM;
1362 isp116x_write_reg32(isp116x, HCRHDESCA, val);
1363 isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);
1364
1365 val = RH_B_PPCM;
1366 isp116x_write_reg32(isp116x, HCRHDESCB, val);
1367 isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);
1368
1369 val = 0;
1370 if (board->remote_wakeup_enable) {
1371 if (!device_can_wakeup(hcd->self.controller))
1372 device_init_wakeup(hcd->self.controller, 1);
1373 val |= RH_HS_DRWE;
1374 }
1375 isp116x_write_reg32(isp116x, HCRHSTATUS, val);
1376 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
1377
1378 isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);
1379
1380 hcd->state = HC_STATE_RUNNING;
1381
1382 /* Set up interrupts */
1383 isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE;
1384 if (board->remote_wakeup_enable)
1385 isp116x->intenb |= HCINT_RD;
1386 isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */
1387 isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb);
1388 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
1389
1390 /* Go operational */
1391 val = HCCONTROL_USB_OPER;
1392 if (board->remote_wakeup_enable)
1393 val |= HCCONTROL_RWE;
1394 isp116x_write_reg32(isp116x, HCCONTROL, val);
1395
1396 /* Disable ports to avoid race in device enumeration */
1397 isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
1398 isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);
1399
1400 isp116x_show_regs_log(isp116x);
1401 spin_unlock_irqrestore(&isp116x->lock, flags);
1402 return 0;
1403}
1404
1405#ifdef CONFIG_PM
1406
1407static int isp116x_bus_suspend(struct usb_hcd *hcd)
1408{
1409 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1410 unsigned long flags;
1411 u32 val;
1412 int ret = 0;
1413
1414 spin_lock_irqsave(&isp116x->lock, flags);
1415 val = isp116x_read_reg32(isp116x, HCCONTROL);
1416
1417 switch (val & HCCONTROL_HCFS) {
1418 case HCCONTROL_USB_OPER:
1419 spin_unlock_irqrestore(&isp116x->lock, flags);
1420 val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
1421 val |= HCCONTROL_USB_SUSPEND;
1422 if (hcd->self.root_hub->do_remote_wakeup)
1423 val |= HCCONTROL_RWE;
1424 /* Wait for usb transfers to finish */
1425 msleep(2);
1426 spin_lock_irqsave(&isp116x->lock, flags);
1427 isp116x_write_reg32(isp116x, HCCONTROL, val);
1428 spin_unlock_irqrestore(&isp116x->lock, flags);
1429 /* Wait for devices to suspend */
1430 msleep(5);
1431 break;
1432 case HCCONTROL_USB_RESUME:
1433 isp116x_write_reg32(isp116x, HCCONTROL,
1434 (val & ~HCCONTROL_HCFS) |
1435 HCCONTROL_USB_RESET);
1436 case HCCONTROL_USB_RESET:
1437 ret = -EBUSY;
1438 default: /* HCCONTROL_USB_SUSPEND */
1439 spin_unlock_irqrestore(&isp116x->lock, flags);
1440 break;
1441 }
1442
1443 return ret;
1444}
1445
1446static int isp116x_bus_resume(struct usb_hcd *hcd)
1447{
1448 struct isp116x *isp116x = hcd_to_isp116x(hcd);
1449 u32 val;
1450
1451 msleep(5);
1452 spin_lock_irq(&isp116x->lock);
1453
1454 val = isp116x_read_reg32(isp116x, HCCONTROL);
1455 switch (val & HCCONTROL_HCFS) {
1456 case HCCONTROL_USB_SUSPEND:
1457 val &= ~HCCONTROL_HCFS;
1458 val |= HCCONTROL_USB_RESUME;
1459 isp116x_write_reg32(isp116x, HCCONTROL, val);
1460 case HCCONTROL_USB_RESUME:
1461 break;
1462 case HCCONTROL_USB_OPER:
1463 spin_unlock_irq(&isp116x->lock);
1464 return 0;
1465 default:
1466 /* HCCONTROL_USB_RESET: this may happen, when during
1467 suspension the HC lost power. Reinitialize completely */
1468 spin_unlock_irq(&isp116x->lock);
1469 DBG("Chip has been reset while suspended. Reinit from scratch.\n");
1470 isp116x_reset(hcd);
1471 isp116x_start(hcd);
1472 isp116x_hub_control(hcd, SetPortFeature,
1473 USB_PORT_FEAT_POWER, 1, NULL, 0);
1474 if ((isp116x->rhdesca & RH_A_NDP) == 2)
1475 isp116x_hub_control(hcd, SetPortFeature,
1476 USB_PORT_FEAT_POWER, 2, NULL, 0);
1477 return 0;
1478 }
1479
1480 val = isp116x->rhdesca & RH_A_NDP;
1481 while (val--) {
1482 u32 stat =
1483 isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1);
1484 /* force global, not selective, resume */
1485 if (!(stat & RH_PS_PSS))
1486 continue;
1487 DBG("%s: Resuming port %d\n", __func__, val);
1488 isp116x_write_reg32(isp116x, RH_PS_POCI, val
1489 ? HCRHPORT2 : HCRHPORT1);
1490 }
1491 spin_unlock_irq(&isp116x->lock);
1492
1493 hcd->state = HC_STATE_RESUMING;
1494 msleep(USB_RESUME_TIMEOUT);
1495
1496 /* Go operational */
1497 spin_lock_irq(&isp116x->lock);
1498 val = isp116x_read_reg32(isp116x, HCCONTROL);
1499 isp116x_write_reg32(isp116x, HCCONTROL,
1500 (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER);
1501 spin_unlock_irq(&isp116x->lock);
1502 hcd->state = HC_STATE_RUNNING;
1503
1504 return 0;
1505}
1506
1507#else
1508
1509#define isp116x_bus_suspend NULL
1510#define isp116x_bus_resume NULL
1511
1512#endif
1513
1514static struct hc_driver isp116x_hc_driver = {
1515 .description = hcd_name,
1516 .product_desc = "ISP116x Host Controller",
1517 .hcd_priv_size = sizeof(struct isp116x),
1518
1519 .irq = isp116x_irq,
1520 .flags = HCD_USB11,
1521
1522 .reset = isp116x_reset,
1523 .start = isp116x_start,
1524 .stop = isp116x_stop,
1525
1526 .urb_enqueue = isp116x_urb_enqueue,
1527 .urb_dequeue = isp116x_urb_dequeue,
1528 .endpoint_disable = isp116x_endpoint_disable,
1529
1530 .get_frame_number = isp116x_get_frame,
1531
1532 .hub_status_data = isp116x_hub_status_data,
1533 .hub_control = isp116x_hub_control,
1534 .bus_suspend = isp116x_bus_suspend,
1535 .bus_resume = isp116x_bus_resume,
1536};
1537
1538/*----------------------------------------------------------------*/
1539
1540static int isp116x_remove(struct platform_device *pdev)
1541{
1542 struct usb_hcd *hcd = platform_get_drvdata(pdev);
1543 struct isp116x *isp116x;
1544 struct resource *res;
1545
1546 if (!hcd)
1547 return 0;
1548 isp116x = hcd_to_isp116x(hcd);
1549 remove_debug_file(isp116x);
1550 usb_remove_hcd(hcd);
1551
1552 iounmap(isp116x->data_reg);
1553 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1554 release_mem_region(res->start, 2);
1555 iounmap(isp116x->addr_reg);
1556 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1557 release_mem_region(res->start, 2);
1558
1559 usb_put_hcd(hcd);
1560 return 0;
1561}
1562
1563static int isp116x_probe(struct platform_device *pdev)
1564{
1565 struct usb_hcd *hcd;
1566 struct isp116x *isp116x;
1567 struct resource *addr, *data, *ires;
1568 void __iomem *addr_reg;
1569 void __iomem *data_reg;
1570 int irq;
1571 int ret = 0;
1572 unsigned long irqflags;
1573
1574 if (usb_disabled())
1575 return -ENODEV;
1576
1577 if (pdev->num_resources < 3) {
1578 ret = -ENODEV;
1579 goto err1;
1580 }
1581
1582 data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1583 addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1584 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1585
1586 if (!addr || !data || !ires) {
1587 ret = -ENODEV;
1588 goto err1;
1589 }
1590
1591 irq = ires->start;
1592 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1593
1594 if (pdev->dev.dma_mask) {
1595 DBG("DMA not supported\n");
1596 ret = -EINVAL;
1597 goto err1;
1598 }
1599
1600 if (!request_mem_region(addr->start, 2, hcd_name)) {
1601 ret = -EBUSY;
1602 goto err1;
1603 }
1604 addr_reg = ioremap(addr->start, resource_size(addr));
1605 if (addr_reg == NULL) {
1606 ret = -ENOMEM;
1607 goto err2;
1608 }
1609 if (!request_mem_region(data->start, 2, hcd_name)) {
1610 ret = -EBUSY;
1611 goto err3;
1612 }
1613 data_reg = ioremap(data->start, resource_size(data));
1614 if (data_reg == NULL) {
1615 ret = -ENOMEM;
1616 goto err4;
1617 }
1618
1619 /* allocate and initialize hcd */
1620 hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev));
1621 if (!hcd) {
1622 ret = -ENOMEM;
1623 goto err5;
1624 }
1625 /* this rsrc_start is bogus */
1626 hcd->rsrc_start = addr->start;
1627 isp116x = hcd_to_isp116x(hcd);
1628 isp116x->data_reg = data_reg;
1629 isp116x->addr_reg = addr_reg;
1630 spin_lock_init(&isp116x->lock);
1631 INIT_LIST_HEAD(&isp116x->async);
1632 isp116x->board = dev_get_platdata(&pdev->dev);
1633
1634 if (!isp116x->board) {
1635 ERR("Platform data structure not initialized\n");
1636 ret = -ENODEV;
1637 goto err6;
1638 }
1639 if (isp116x_check_platform_delay(isp116x)) {
1640 ERR("USE_PLATFORM_DELAY defined, but delay function not "
1641 "implemented.\n");
1642 ERR("See comments in drivers/usb/host/isp116x-hcd.c\n");
1643 ret = -ENODEV;
1644 goto err6;
1645 }
1646
1647 ret = usb_add_hcd(hcd, irq, irqflags);
1648 if (ret)
1649 goto err6;
1650
1651 device_wakeup_enable(hcd->self.controller);
1652
1653 ret = create_debug_file(isp116x);
1654 if (ret) {
1655 ERR("Couldn't create debugfs entry\n");
1656 goto err7;
1657 }
1658
1659 return 0;
1660
1661 err7:
1662 usb_remove_hcd(hcd);
1663 err6:
1664 usb_put_hcd(hcd);
1665 err5:
1666 iounmap(data_reg);
1667 err4:
1668 release_mem_region(data->start, 2);
1669 err3:
1670 iounmap(addr_reg);
1671 err2:
1672 release_mem_region(addr->start, 2);
1673 err1:
1674 ERR("init error, %d\n", ret);
1675 return ret;
1676}
1677
1678#ifdef CONFIG_PM
1679/*
1680 Suspend of platform device
1681*/
1682static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
1683{
1684 VDBG("%s: state %x\n", __func__, state.event);
1685 return 0;
1686}
1687
1688/*
1689 Resume platform device
1690*/
1691static int isp116x_resume(struct platform_device *dev)
1692{
1693 VDBG("%s\n", __func__);
1694 return 0;
1695}
1696
1697#else
1698
1699#define isp116x_suspend NULL
1700#define isp116x_resume NULL
1701
1702#endif
1703
1704/* work with hotplug and coldplug */
1705MODULE_ALIAS("platform:isp116x-hcd");
1706
1707static struct platform_driver isp116x_driver = {
1708 .probe = isp116x_probe,
1709 .remove = isp116x_remove,
1710 .suspend = isp116x_suspend,
1711 .resume = isp116x_resume,
1712 .driver = {
1713 .name = hcd_name,
1714 },
1715};
1716
1717module_platform_driver(isp116x_driver);