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sanitize <linux/prefetch.h> usage
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / host / sl811-hcd.c
blobfafccc2fd33140386e83413022a9a8c661b9e4be
1 /*
2 * SL811HS HCD (Host Controller Driver) for USB.
3 *
4 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
5 * Copyright (C) 2004-2005 David Brownell
6 *
7 * Periodic scheduling is based on Roman's OHCI code
8 * Copyright (C) 1999 Roman Weissgaerber
9 *
10 * The SL811HS controller handles host side USB (like the SL11H, but with
11 * another register set and SOF generation) as well as peripheral side USB
12 * (like the SL811S). This driver version doesn't implement the Gadget API
13 * for the peripheral role; or OTG (that'd need much external circuitry).
14 *
15 * For documentation, see the SL811HS spec and the "SL811HS Embedded Host"
16 * document (providing significant pieces missing from that spec); plus
17 * the SL811S spec if you want peripheral side info.
18 */
19
20 /*
21 * Status: Passed basic stress testing, works with hubs, mice, keyboards,
22 * and usb-storage.
23 *
24 * TODO:
25 * - usb suspend/resume triggered by sl811 (with USB_SUSPEND)
26 * - various issues noted in the code
27 * - performance work; use both register banks; ...
28 * - use urb->iso_frame_desc[] with ISO transfers
29 */
30
31 #undef VERBOSE
32 #undef PACKET_TRACE
33
34 #include <linux/module.h>
35 #include <linux/moduleparam.h>
36 #include <linux/kernel.h>
37 #include <linux/delay.h>
38 #include <linux/ioport.h>
39 #include <linux/sched.h>
40 #include <linux/slab.h>
41 #include <linux/errno.h>
42 #include <linux/init.h>
43 #include <linux/timer.h>
44 #include <linux/list.h>
45 #include <linux/interrupt.h>
46 #include <linux/usb.h>
47 #include <linux/usb/sl811.h>
48 #include <linux/usb/hcd.h>
49 #include <linux/platform_device.h>
50 #include <linux/prefetch.h>
51
52 #include <asm/io.h>
53 #include <asm/irq.h>
54 #include <asm/system.h>
55 #include <asm/byteorder.h>
56 #include <asm/unaligned.h>
57
58 #include "sl811.h"
59
60
61 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
62 MODULE_LICENSE("GPL");
63 MODULE_ALIAS("platform:sl811-hcd");
64
65 #define DRIVER_VERSION "19 May 2005"
66
67
68 #ifndef DEBUG
69 # define STUB_DEBUG_FILE
70 #endif
71
72 /* for now, use only one transfer register bank */
73 #undef USE_B
74
75 /* this doesn't understand urb->iso_frame_desc[], but if you had a driver
76 * that just queued one ISO frame per URB then iso transfers "should" work
77 * using the normal urb status fields.
78 */
79 #define DISABLE_ISO
80
81 // #define QUIRK2
82 #define QUIRK3
83
84 static const char hcd_name[] = "sl811-hcd";
85
86 /*-------------------------------------------------------------------------*/
87
88 static void port_power(struct sl811 *sl811, int is_on)
89 {
90 struct usb_hcd *hcd = sl811_to_hcd(sl811);
91
92 /* hub is inactive unless the port is powered */
93 if (is_on) {
94 if (sl811->port1 & USB_PORT_STAT_POWER)
95 return;
96
97 sl811->port1 = USB_PORT_STAT_POWER;
98 sl811->irq_enable = SL11H_INTMASK_INSRMV;
99 } else {
100 sl811->port1 = 0;
101 sl811->irq_enable = 0;
102 hcd->state = HC_STATE_HALT;
103 }
104 sl811->ctrl1 = 0;
105 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
106 sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
107
108 if (sl811->board && sl811->board->port_power) {
109 /* switch VBUS, at 500mA unless hub power budget gets set */
110 DBG("power %s\n", is_on ? "on" : "off");
111 sl811->board->port_power(hcd->self.controller, is_on);
112 }
113
114 /* reset as thoroughly as we can */
115 if (sl811->board && sl811->board->reset)
116 sl811->board->reset(hcd->self.controller);
117 else {
118 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0);
119 mdelay(20);
120 }
121
122 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
123 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
124 sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
125 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
126
127 // if !is_on, put into lowpower mode now
128 }
129
130 /*-------------------------------------------------------------------------*/
131
132 /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue,
133 * and may start I/O. Endpoint queues are scanned during completion irq
134 * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation.
135 *
136 * Using an external DMA engine to copy a packet at a time could work,
137 * though setup/teardown costs may be too big to make it worthwhile.
138 */
139
140 /* SETUP starts a new control request. Devices are not allowed to
141 * STALL or NAK these; they must cancel any pending control requests.
142 */
143 static void setup_packet(
144 struct sl811 *sl811,
145 struct sl811h_ep *ep,
146 struct urb *urb,
147 u8 bank,
148 u8 control
149 )
150 {
151 u8 addr;
152 u8 len;
153 void __iomem *data_reg;
154
155 addr = SL811HS_PACKET_BUF(bank == 0);
156 len = sizeof(struct usb_ctrlrequest);
157 data_reg = sl811->data_reg;
158 sl811_write_buf(sl811, addr, urb->setup_packet, len);
159
160 /* autoincrementing */
161 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
162 writeb(len, data_reg);
163 writeb(SL_SETUP /* | ep->epnum */, data_reg);
164 writeb(usb_pipedevice(urb->pipe), data_reg);
165
166 /* always OUT/data0 */ ;
167 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
168 control | SL11H_HCTLMASK_OUT);
169 ep->length = 0;
170 PACKET("SETUP qh%p\n", ep);
171 }
172
173 /* STATUS finishes control requests, often after IN or OUT data packets */
174 static void status_packet(
175 struct sl811 *sl811,
176 struct sl811h_ep *ep,
177 struct urb *urb,
178 u8 bank,
179 u8 control
180 )
181 {
182 int do_out;
183 void __iomem *data_reg;
184
185 do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
186 data_reg = sl811->data_reg;
187
188 /* autoincrementing */
189 sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
190 writeb(0, data_reg);
191 writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
192 writeb(usb_pipedevice(urb->pipe), data_reg);
193
194 /* always data1; sometimes IN */
195 control |= SL11H_HCTLMASK_TOGGLE;
196 if (do_out)
197 control |= SL11H_HCTLMASK_OUT;
198 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
199 ep->length = 0;
200 PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
201 do_out ? "out" : "in", ep);
202 }
203
204 /* IN packets can be used with any type of endpoint. here we just
205 * start the transfer, data from the peripheral may arrive later.
206 * urb->iso_frame_desc is currently ignored here...
207 */
208 static void in_packet(
209 struct sl811 *sl811,
210 struct sl811h_ep *ep,
211 struct urb *urb,
212 u8 bank,
213 u8 control
214 )
215 {
216 u8 addr;
217 u8 len;
218 void __iomem *data_reg;
219
220 /* avoid losing data on overflow */
221 len = ep->maxpacket;
222 addr = SL811HS_PACKET_BUF(bank == 0);
223 if (!(control & SL11H_HCTLMASK_ISOCH)
224 && usb_gettoggle(urb->dev, ep->epnum, 0))
225 control |= SL11H_HCTLMASK_TOGGLE;
226 data_reg = sl811->data_reg;
227
228 /* autoincrementing */
229 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
230 writeb(len, data_reg);
231 writeb(SL_IN | ep->epnum, data_reg);
232 writeb(usb_pipedevice(urb->pipe), data_reg);
233
234 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
235 ep->length = min_t(u32, len,
236 urb->transfer_buffer_length - urb->actual_length);
237 PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
238 !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
239 }
240
241 /* OUT packets can be used with any type of endpoint.
242 * urb->iso_frame_desc is currently ignored here...
243 */
244 static void out_packet(
245 struct sl811 *sl811,
246 struct sl811h_ep *ep,
247 struct urb *urb,
248 u8 bank,
249 u8 control
250 )
251 {
252 void *buf;
253 u8 addr;
254 u8 len;
255 void __iomem *data_reg;
256
257 buf = urb->transfer_buffer + urb->actual_length;
258 prefetch(buf);
259
260 len = min_t(u32, ep->maxpacket,
261 urb->transfer_buffer_length - urb->actual_length);
262
263 if (!(control & SL11H_HCTLMASK_ISOCH)
264 && usb_gettoggle(urb->dev, ep->epnum, 1))
265 control |= SL11H_HCTLMASK_TOGGLE;
266 addr = SL811HS_PACKET_BUF(bank == 0);
267 data_reg = sl811->data_reg;
268
269 sl811_write_buf(sl811, addr, buf, len);
270
271 /* autoincrementing */
272 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
273 writeb(len, data_reg);
274 writeb(SL_OUT | ep->epnum, data_reg);
275 writeb(usb_pipedevice(urb->pipe), data_reg);
276
277 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
278 control | SL11H_HCTLMASK_OUT);
279 ep->length = len;
280 PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
281 !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
282 }
283
284 /*-------------------------------------------------------------------------*/
285
286 /* caller updates on-chip enables later */
287
288 static inline void sofirq_on(struct sl811 *sl811)
289 {
290 if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
291 return;
292 VDBG("sof irq on\n");
293 sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
294 }
295
296 static inline void sofirq_off(struct sl811 *sl811)
297 {
298 if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
299 return;
300 VDBG("sof irq off\n");
301 sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
302 }
303
304 /*-------------------------------------------------------------------------*/
305
306 /* pick the next endpoint for a transaction, and issue it.
307 * frames start with periodic transfers (after whatever is pending
308 * from the previous frame), and the rest of the time is async
309 * transfers, scheduled round-robin.
310 */
311 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
312 {
313 struct sl811h_ep *ep;
314 struct urb *urb;
315 int fclock;
316 u8 control;
317
318 /* use endpoint at schedule head */
319 if (sl811->next_periodic) {
320 ep = sl811->next_periodic;
321 sl811->next_periodic = ep->next;
322 } else {
323 if (sl811->next_async)
324 ep = sl811->next_async;
325 else if (!list_empty(&sl811->async))
326 ep = container_of(sl811->async.next,
327 struct sl811h_ep, schedule);
328 else {
329 /* could set up the first fullspeed periodic
330 * transfer for the next frame ...
331 */
332 return NULL;
333 }
334
335 #ifdef USE_B
336 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
337 return NULL;
338 #endif
339
340 if (ep->schedule.next == &sl811->async)
341 sl811->next_async = NULL;
342 else
343 sl811->next_async = container_of(ep->schedule.next,
344 struct sl811h_ep, schedule);
345 }
346
347 if (unlikely(list_empty(&ep->hep->urb_list))) {
348 DBG("empty %p queue?\n", ep);
349 return NULL;
350 }
351
352 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
353 control = ep->defctrl;
354
355 /* if this frame doesn't have enough time left to transfer this
356 * packet, wait till the next frame. too-simple algorithm...
357 */
358 fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
359 fclock -= 100; /* setup takes not much time */
360 if (urb->dev->speed == USB_SPEED_LOW) {
361 if (control & SL11H_HCTLMASK_PREAMBLE) {
362 /* also note erratum 1: some hubs won't work */
363 fclock -= 800;
364 }
365 fclock -= ep->maxpacket << 8;
366
367 /* erratum 2: AFTERSOF only works for fullspeed */
368 if (fclock < 0) {
369 if (ep->period)
370 sl811->stat_overrun++;
371 sofirq_on(sl811);
372 return NULL;
373 }
374 } else {
375 fclock -= 12000 / 19; /* 19 64byte packets/msec */
376 if (fclock < 0) {
377 if (ep->period)
378 sl811->stat_overrun++;
379 control |= SL11H_HCTLMASK_AFTERSOF;
380
381 /* throttle bulk/control irq noise */
382 } else if (ep->nak_count)
383 control |= SL11H_HCTLMASK_AFTERSOF;
384 }
385
386
387 switch (ep->nextpid) {
388 case USB_PID_IN:
389 in_packet(sl811, ep, urb, bank, control);
390 break;
391 case USB_PID_OUT:
392 out_packet(sl811, ep, urb, bank, control);
393 break;
394 case USB_PID_SETUP:
395 setup_packet(sl811, ep, urb, bank, control);
396 break;
397 case USB_PID_ACK: /* for control status */
398 status_packet(sl811, ep, urb, bank, control);
399 break;
400 default:
401 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
402 ep = NULL;
403 }
404 return ep;
405 }
406
407 #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
408
409 static inline void start_transfer(struct sl811 *sl811)
410 {
411 if (sl811->port1 & USB_PORT_STAT_SUSPEND)
412 return;
413 if (sl811->active_a == NULL) {
414 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
415 if (sl811->active_a != NULL)
416 sl811->jiffies_a = jiffies + MIN_JIFFIES;
417 }
418 #ifdef USE_B
419 if (sl811->active_b == NULL) {
420 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
421 if (sl811->active_b != NULL)
422 sl811->jiffies_b = jiffies + MIN_JIFFIES;
423 }
424 #endif
425 }
426
427 static void finish_request(
428 struct sl811 *sl811,
429 struct sl811h_ep *ep,
430 struct urb *urb,
431 int status
432 ) __releases(sl811->lock) __acquires(sl811->lock)
433 {
434 unsigned i;
435
436 if (usb_pipecontrol(urb->pipe))
437 ep->nextpid = USB_PID_SETUP;
438
439 usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
440 spin_unlock(&sl811->lock);
441 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status);
442 spin_lock(&sl811->lock);
443
444 /* leave active endpoints in the schedule */
445 if (!list_empty(&ep->hep->urb_list))
446 return;
447
448 /* async deschedule? */
449 if (!list_empty(&ep->schedule)) {
450 list_del_init(&ep->schedule);
451 if (ep == sl811->next_async)
452 sl811->next_async = NULL;
453 return;
454 }
455
456 /* periodic deschedule */
457 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
458 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
459 struct sl811h_ep *temp;
460 struct sl811h_ep **prev = &sl811->periodic[i];
461
462 while (*prev && ((temp = *prev) != ep))
463 prev = &temp->next;
464 if (*prev)
465 *prev = ep->next;
466 sl811->load[i] -= ep->load;
467 }
468 ep->branch = PERIODIC_SIZE;
469 sl811->periodic_count--;
470 sl811_to_hcd(sl811)->self.bandwidth_allocated
471 -= ep->load / ep->period;
472 if (ep == sl811->next_periodic)
473 sl811->next_periodic = ep->next;
474
475 /* we might turn SOFs back on again for the async schedule */
476 if (sl811->periodic_count == 0)
477 sofirq_off(sl811);
478 }
479
480 static void
481 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
482 {
483 u8 status;
484 struct urb *urb;
485 int urbstat = -EINPROGRESS;
486
487 if (unlikely(!ep))
488 return;
489
490 status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
491
492 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
493
494 /* we can safely ignore NAKs */
495 if (status & SL11H_STATMASK_NAK) {
496 // PACKET("...NAK_%02x qh%p\n", bank, ep);
497 if (!ep->period)
498 ep->nak_count++;
499 ep->error_count = 0;
500
501 /* ACK advances transfer, toggle, and maybe queue */
502 } else if (status & SL11H_STATMASK_ACK) {
503 struct usb_device *udev = urb->dev;
504 int len;
505 unsigned char *buf;
506
507 /* urb->iso_frame_desc is currently ignored here... */
508
509 ep->nak_count = ep->error_count = 0;
510 switch (ep->nextpid) {
511 case USB_PID_OUT:
512 // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
513 urb->actual_length += ep->length;
514 usb_dotoggle(udev, ep->epnum, 1);
515 if (urb->actual_length
516 == urb->transfer_buffer_length) {
517 if (usb_pipecontrol(urb->pipe))
518 ep->nextpid = USB_PID_ACK;
519
520 /* some bulk protocols terminate OUT transfers
521 * by a short packet, using ZLPs not padding.
522 */
523 else if (ep->length < ep->maxpacket
524 || !(urb->transfer_flags
525 & URB_ZERO_PACKET))
526 urbstat = 0;
527 }
528 break;
529 case USB_PID_IN:
530 // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
531 buf = urb->transfer_buffer + urb->actual_length;
532 prefetchw(buf);
533 len = ep->maxpacket - sl811_read(sl811,
534 bank + SL11H_XFERCNTREG);
535 if (len > ep->length) {
536 len = ep->length;
537 urbstat = -EOVERFLOW;
538 }
539 urb->actual_length += len;
540 sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
541 buf, len);
542 usb_dotoggle(udev, ep->epnum, 0);
543 if (urbstat == -EINPROGRESS &&
544 (len < ep->maxpacket ||
545 urb->actual_length ==
546 urb->transfer_buffer_length)) {
547 if (usb_pipecontrol(urb->pipe))
548 ep->nextpid = USB_PID_ACK;
549 else
550 urbstat = 0;
551 }
552 break;
553 case USB_PID_SETUP:
554 // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
555 if (urb->transfer_buffer_length == urb->actual_length)
556 ep->nextpid = USB_PID_ACK;
557 else if (usb_pipeout(urb->pipe)) {
558 usb_settoggle(udev, 0, 1, 1);
559 ep->nextpid = USB_PID_OUT;
560 } else {
561 usb_settoggle(udev, 0, 0, 1);
562 ep->nextpid = USB_PID_IN;
563 }
564 break;
565 case USB_PID_ACK:
566 // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
567 urbstat = 0;
568 break;
569 }
570
571 /* STALL stops all transfers */
572 } else if (status & SL11H_STATMASK_STALL) {
573 PACKET("...STALL_%02x qh%p\n", bank, ep);
574 ep->nak_count = ep->error_count = 0;
575 urbstat = -EPIPE;
576
577 /* error? retry, until "3 strikes" */
578 } else if (++ep->error_count >= 3) {
579 if (status & SL11H_STATMASK_TMOUT)
580 urbstat = -ETIME;
581 else if (status & SL11H_STATMASK_OVF)
582 urbstat = -EOVERFLOW;
583 else
584 urbstat = -EPROTO;
585 ep->error_count = 0;
586 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
587 bank, status, ep, urbstat);
588 }
589
590 if (urbstat != -EINPROGRESS || urb->unlinked)
591 finish_request(sl811, ep, urb, urbstat);
592 }
593
594 static inline u8 checkdone(struct sl811 *sl811)
595 {
596 u8 ctl;
597 u8 irqstat = 0;
598
599 if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
600 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
601 if (ctl & SL11H_HCTLMASK_ARM)
602 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
603 DBG("%s DONE_A: ctrl %02x sts %02x\n",
604 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
605 ctl,
606 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
607 irqstat |= SL11H_INTMASK_DONE_A;
608 }
609 #ifdef USE_B
610 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
611 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
612 if (ctl & SL11H_HCTLMASK_ARM)
613 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
614 DBG("%s DONE_B: ctrl %02x sts %02x\n",
615 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
616 ctl,
617 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
618 irqstat |= SL11H_INTMASK_DONE_A;
619 }
620 #endif
621 return irqstat;
622 }
623
624 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
625 {
626 struct sl811 *sl811 = hcd_to_sl811(hcd);
627 u8 irqstat;
628 irqreturn_t ret = IRQ_NONE;
629 unsigned retries = 5;
630
631 spin_lock(&sl811->lock);
632
633 retry:
634 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
635 if (irqstat) {
636 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
637 irqstat &= sl811->irq_enable;
638 }
639
640 #ifdef QUIRK2
641 /* this may no longer be necessary ... */
642 if (irqstat == 0) {
643 irqstat = checkdone(sl811);
644 if (irqstat)
645 sl811->stat_lost++;
646 }
647 #endif
648
649 /* USB packets, not necessarily handled in the order they're
650 * issued ... that's fine if they're different endpoints.
651 */
652 if (irqstat & SL11H_INTMASK_DONE_A) {
653 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF));
654 sl811->active_a = NULL;
655 sl811->stat_a++;
656 }
657 #ifdef USE_B
658 if (irqstat & SL11H_INTMASK_DONE_B) {
659 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF));
660 sl811->active_b = NULL;
661 sl811->stat_b++;
662 }
663 #endif
664 if (irqstat & SL11H_INTMASK_SOFINTR) {
665 unsigned index;
666
667 index = sl811->frame++ % (PERIODIC_SIZE - 1);
668 sl811->stat_sof++;
669
670 /* be graceful about almost-inevitable periodic schedule
671 * overruns: continue the previous frame's transfers iff
672 * this one has nothing scheduled.
673 */
674 if (sl811->next_periodic) {
675 // ERR("overrun to slot %d\n", index);
676 sl811->stat_overrun++;
677 }
678 if (sl811->periodic[index])
679 sl811->next_periodic = sl811->periodic[index];
680 }
681
682 /* khubd manages debouncing and wakeup */
683 if (irqstat & SL11H_INTMASK_INSRMV) {
684 sl811->stat_insrmv++;
685
686 /* most stats are reset for each VBUS session */
687 sl811->stat_wake = 0;
688 sl811->stat_sof = 0;
689 sl811->stat_a = 0;
690 sl811->stat_b = 0;
691 sl811->stat_lost = 0;
692
693 sl811->ctrl1 = 0;
694 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
695
696 sl811->irq_enable = SL11H_INTMASK_INSRMV;
697 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
698
699 /* usbcore nukes other pending transactions on disconnect */
700 if (sl811->active_a) {
701 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
702 finish_request(sl811, sl811->active_a,
703 container_of(sl811->active_a
704 ->hep->urb_list.next,
705 struct urb, urb_list),
706 -ESHUTDOWN);
707 sl811->active_a = NULL;
708 }
709 #ifdef USE_B
710 if (sl811->active_b) {
711 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
712 finish_request(sl811, sl811->active_b,
713 container_of(sl811->active_b
714 ->hep->urb_list.next,
715 struct urb, urb_list),
716 NULL, -ESHUTDOWN);
717 sl811->active_b = NULL;
718 }
719 #endif
720
721 /* port status seems weird until after reset, so
722 * force the reset and make khubd clean up later.
723 */
724 if (irqstat & SL11H_INTMASK_RD)
725 sl811->port1 &= ~USB_PORT_STAT_CONNECTION;
726 else
727 sl811->port1 |= USB_PORT_STAT_CONNECTION;
728
729 sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16;
730
731 } else if (irqstat & SL11H_INTMASK_RD) {
732 if (sl811->port1 & USB_PORT_STAT_SUSPEND) {
733 DBG("wakeup\n");
734 sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16;
735 sl811->stat_wake++;
736 } else
737 irqstat &= ~SL11H_INTMASK_RD;
738 }
739
740 if (irqstat) {
741 if (sl811->port1 & USB_PORT_STAT_ENABLE)
742 start_transfer(sl811);
743 ret = IRQ_HANDLED;
744 if (retries--)
745 goto retry;
746 }
747
748 if (sl811->periodic_count == 0 && list_empty(&sl811->async))
749 sofirq_off(sl811);
750 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
751
752 spin_unlock(&sl811->lock);
753
754 return ret;
755 }
756
757 /*-------------------------------------------------------------------------*/
758
759 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
760 * this driver doesn't promise that much since it's got to handle an
761 * IRQ per packet; irq handling latencies also use up that time.
762 *
763 * NOTE: the periodic schedule is a sparse tree, with the load for
764 * each branch minimized. see fig 3.5 in the OHCI spec for example.
765 */
766 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
767
768 static int balance(struct sl811 *sl811, u16 period, u16 load)
769 {
770 int i, branch = -ENOSPC;
771
772 /* search for the least loaded schedule branch of that period
773 * which has enough bandwidth left unreserved.
774 */
775 for (i = 0; i < period ; i++) {
776 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
777 int j;
778
779 for (j = i; j < PERIODIC_SIZE; j += period) {
780 if ((sl811->load[j] + load)
781 > MAX_PERIODIC_LOAD)
782 break;
783 }
784 if (j < PERIODIC_SIZE)
785 continue;
786 branch = i;
787 }
788 }
789 return branch;
790 }
791
792 /*-------------------------------------------------------------------------*/
793
794 static int sl811h_urb_enqueue(
795 struct usb_hcd *hcd,
796 struct urb *urb,
797 gfp_t mem_flags
798 ) {
799 struct sl811 *sl811 = hcd_to_sl811(hcd);
800 struct usb_device *udev = urb->dev;
801 unsigned int pipe = urb->pipe;
802 int is_out = !usb_pipein(pipe);
803 int type = usb_pipetype(pipe);
804 int epnum = usb_pipeendpoint(pipe);
805 struct sl811h_ep *ep = NULL;
806 unsigned long flags;
807 int i;
808 int retval;
809 struct usb_host_endpoint *hep = urb->ep;
810
811 #ifdef DISABLE_ISO
812 if (type == PIPE_ISOCHRONOUS)
813 return -ENOSPC;
814 #endif
815
816 /* avoid all allocations within spinlocks */
817 if (!hep->hcpriv) {
818 ep = kzalloc(sizeof *ep, mem_flags);
819 if (ep == NULL)
820 return -ENOMEM;
821 }
822
823 spin_lock_irqsave(&sl811->lock, flags);
824
825 /* don't submit to a dead or disabled port */
826 if (!(sl811->port1 & USB_PORT_STAT_ENABLE)
827 || !HC_IS_RUNNING(hcd->state)) {
828 retval = -ENODEV;
829 kfree(ep);
830 goto fail_not_linked;
831 }
832 retval = usb_hcd_link_urb_to_ep(hcd, urb);
833 if (retval) {
834 kfree(ep);
835 goto fail_not_linked;
836 }
837
838 if (hep->hcpriv) {
839 kfree(ep);
840 ep = hep->hcpriv;
841 } else if (!ep) {
842 retval = -ENOMEM;
843 goto fail;
844
845 } else {
846 INIT_LIST_HEAD(&ep->schedule);
847 ep->udev = udev;
848 ep->epnum = epnum;
849 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
850 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
851 usb_settoggle(udev, epnum, is_out, 0);
852
853 if (type == PIPE_CONTROL)
854 ep->nextpid = USB_PID_SETUP;
855 else if (is_out)
856 ep->nextpid = USB_PID_OUT;
857 else
858 ep->nextpid = USB_PID_IN;
859
860 if (ep->maxpacket > H_MAXPACKET) {
861 /* iso packets up to 240 bytes could work... */
862 DBG("dev %d ep%d maxpacket %d\n",
863 udev->devnum, epnum, ep->maxpacket);
864 retval = -EINVAL;
865 kfree(ep);
866 goto fail;
867 }
868
869 if (udev->speed == USB_SPEED_LOW) {
870 /* send preamble for external hub? */
871 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
872 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
873 }
874 switch (type) {
875 case PIPE_ISOCHRONOUS:
876 case PIPE_INTERRUPT:
877 if (urb->interval > PERIODIC_SIZE)
878 urb->interval = PERIODIC_SIZE;
879 ep->period = urb->interval;
880 ep->branch = PERIODIC_SIZE;
881 if (type == PIPE_ISOCHRONOUS)
882 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
883 ep->load = usb_calc_bus_time(udev->speed, !is_out,
884 (type == PIPE_ISOCHRONOUS),
885 usb_maxpacket(udev, pipe, is_out))
886 / 1000;
887 break;
888 }
889
890 ep->hep = hep;
891 hep->hcpriv = ep;
892 }
893
894 /* maybe put endpoint into schedule */
895 switch (type) {
896 case PIPE_CONTROL:
897 case PIPE_BULK:
898 if (list_empty(&ep->schedule))
899 list_add_tail(&ep->schedule, &sl811->async);
900 break;
901 case PIPE_ISOCHRONOUS:
902 case PIPE_INTERRUPT:
903 urb->interval = ep->period;
904 if (ep->branch < PERIODIC_SIZE) {
905 /* NOTE: the phase is correct here, but the value
906 * needs offsetting by the transfer queue depth.
907 * All current drivers ignore start_frame, so this
908 * is unlikely to ever matter...
909 */
910 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
911 + ep->branch;
912 break;
913 }
914
915 retval = balance(sl811, ep->period, ep->load);
916 if (retval < 0)
917 goto fail;
918 ep->branch = retval;
919 retval = 0;
920 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
921 + ep->branch;
922
923 /* sort each schedule branch by period (slow before fast)
924 * to share the faster parts of the tree without needing
925 * dummy/placeholder nodes
926 */
927 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
928 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
929 struct sl811h_ep **prev = &sl811->periodic[i];
930 struct sl811h_ep *here = *prev;
931
932 while (here && ep != here) {
933 if (ep->period > here->period)
934 break;
935 prev = &here->next;
936 here = *prev;
937 }
938 if (ep != here) {
939 ep->next = here;
940 *prev = ep;
941 }
942 sl811->load[i] += ep->load;
943 }
944 sl811->periodic_count++;
945 hcd->self.bandwidth_allocated += ep->load / ep->period;
946 sofirq_on(sl811);
947 }
948
949 urb->hcpriv = hep;
950 start_transfer(sl811);
951 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
952 fail:
953 if (retval)
954 usb_hcd_unlink_urb_from_ep(hcd, urb);
955 fail_not_linked:
956 spin_unlock_irqrestore(&sl811->lock, flags);
957 return retval;
958 }
959
960 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
961 {
962 struct sl811 *sl811 = hcd_to_sl811(hcd);
963 struct usb_host_endpoint *hep;
964 unsigned long flags;
965 struct sl811h_ep *ep;
966 int retval;
967
968 spin_lock_irqsave(&sl811->lock, flags);
969 retval = usb_hcd_check_unlink_urb(hcd, urb, status);
970 if (retval)
971 goto fail;
972
973 hep = urb->hcpriv;
974 ep = hep->hcpriv;
975 if (ep) {
976 /* finish right away if this urb can't be active ...
977 * note that some drivers wrongly expect delays
978 */
979 if (ep->hep->urb_list.next != &urb->urb_list) {
980 /* not front of queue? never active */
981
982 /* for active transfers, we expect an IRQ */
983 } else if (sl811->active_a == ep) {
984 if (time_before_eq(sl811->jiffies_a, jiffies)) {
985 /* happens a lot with lowspeed?? */
986 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
987 sl811_read(sl811,
988 SL811_EP_A(SL11H_HOSTCTLREG)),
989 sl811_read(sl811,
990 SL811_EP_A(SL11H_PKTSTATREG)));
991 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
992 0);
993 sl811->active_a = NULL;
994 } else
995 urb = NULL;
996 #ifdef USE_B
997 } else if (sl811->active_b == ep) {
998 if (time_before_eq(sl811->jiffies_a, jiffies)) {
999 /* happens a lot with lowspeed?? */
1000 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1001 sl811_read(sl811,
1002 SL811_EP_B(SL11H_HOSTCTLREG)),
1003 sl811_read(sl811,
1004 SL811_EP_B(SL11H_PKTSTATREG)));
1005 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1006 0);
1007 sl811->active_b = NULL;
1008 } else
1009 urb = NULL;
1010 #endif
1011 } else {
1012 /* front of queue for inactive endpoint */
1013 }
1014
1015 if (urb)
1016 finish_request(sl811, ep, urb, 0);
1017 else
1018 VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1019 (sl811->active_a == ep) ? "A" : "B");
1020 } else
1021 retval = -EINVAL;
1022 fail:
1023 spin_unlock_irqrestore(&sl811->lock, flags);
1024 return retval;
1025 }
1026
1027 static void
1028 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1029 {
1030 struct sl811h_ep *ep = hep->hcpriv;
1031
1032 if (!ep)
1033 return;
1034
1035 /* assume we'd just wait for the irq */
1036 if (!list_empty(&hep->urb_list))
1037 msleep(3);
1038 if (!list_empty(&hep->urb_list))
1039 WARNING("ep %p not empty?\n", ep);
1040
1041 kfree(ep);
1042 hep->hcpriv = NULL;
1043 }
1044
1045 static int
1046 sl811h_get_frame(struct usb_hcd *hcd)
1047 {
1048 struct sl811 *sl811 = hcd_to_sl811(hcd);
1049
1050 /* wrong except while periodic transfers are scheduled;
1051 * never matches the on-the-wire frame;
1052 * subject to overruns.
1053 */
1054 return sl811->frame;
1055 }
1056
1057
1058 /*-------------------------------------------------------------------------*/
1059
1060 /* the virtual root hub timer IRQ checks for hub status */
1061 static int
1062 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1063 {
1064 struct sl811 *sl811 = hcd_to_sl811(hcd);
1065 #ifdef QUIRK3
1066 unsigned long flags;
1067
1068 /* non-SMP HACK: use root hub timer as i/o watchdog
1069 * this seems essential when SOF IRQs aren't in use...
1070 */
1071 local_irq_save(flags);
1072 if (!timer_pending(&sl811->timer)) {
1073 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE)
1074 sl811->stat_lost++;
1075 }
1076 local_irq_restore(flags);
1077 #endif
1078
1079 if (!(sl811->port1 & (0xffff << 16)))
1080 return 0;
1081
1082 /* tell khubd port 1 changed */
1083 *buf = (1 << 1);
1084 return 1;
1085 }
1086
1087 static void
1088 sl811h_hub_descriptor (
1089 struct sl811 *sl811,
1090 struct usb_hub_descriptor *desc
1091 ) {
1092 u16 temp = 0;
1093
1094 desc->bDescriptorType = 0x29;
1095 desc->bHubContrCurrent = 0;
1096
1097 desc->bNbrPorts = 1;
1098 desc->bDescLength = 9;
1099
1100 /* per-port power switching (gang of one!), or none */
1101 desc->bPwrOn2PwrGood = 0;
1102 if (sl811->board && sl811->board->port_power) {
1103 desc->bPwrOn2PwrGood = sl811->board->potpg;
1104 if (!desc->bPwrOn2PwrGood)
1105 desc->bPwrOn2PwrGood = 10;
1106 temp = 0x0001;
1107 } else
1108 temp = 0x0002;
1109
1110 /* no overcurrent errors detection/handling */
1111 temp |= 0x0010;
1112
1113 desc->wHubCharacteristics = cpu_to_le16(temp);
1114
1115 /* ports removable, and legacy PortPwrCtrlMask */
1116 desc->u.hs.DeviceRemovable[0] = 0 << 1;
1117 desc->u.hs.DeviceRemovable[1] = ~0;
1118 }
1119
1120 static void
1121 sl811h_timer(unsigned long _sl811)
1122 {
1123 struct sl811 *sl811 = (void *) _sl811;
1124 unsigned long flags;
1125 u8 irqstat;
1126 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1127 const u32 mask = USB_PORT_STAT_CONNECTION
1128 | USB_PORT_STAT_ENABLE
1129 | USB_PORT_STAT_LOW_SPEED;
1130
1131 spin_lock_irqsave(&sl811->lock, flags);
1132
1133 /* stop special signaling */
1134 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1135 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1136 udelay(3);
1137
1138 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1139
1140 switch (signaling) {
1141 case SL11H_CTL1MASK_SE0:
1142 DBG("end reset\n");
1143 sl811->port1 = (USB_PORT_STAT_C_RESET << 16)
1144 | USB_PORT_STAT_POWER;
1145 sl811->ctrl1 = 0;
1146 /* don't wrongly ack RD */
1147 if (irqstat & SL11H_INTMASK_INSRMV)
1148 irqstat &= ~SL11H_INTMASK_RD;
1149 break;
1150 case SL11H_CTL1MASK_K:
1151 DBG("end resume\n");
1152 sl811->port1 &= ~USB_PORT_STAT_SUSPEND;
1153 break;
1154 default:
1155 DBG("odd timer signaling: %02x\n", signaling);
1156 break;
1157 }
1158 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1159
1160 if (irqstat & SL11H_INTMASK_RD) {
1161 /* usbcore nukes all pending transactions on disconnect */
1162 if (sl811->port1 & USB_PORT_STAT_CONNECTION)
1163 sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16)
1164 | (USB_PORT_STAT_C_ENABLE << 16);
1165 sl811->port1 &= ~mask;
1166 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1167 } else {
1168 sl811->port1 |= mask;
1169 if (irqstat & SL11H_INTMASK_DP)
1170 sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED;
1171 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1172 }
1173
1174 if (sl811->port1 & USB_PORT_STAT_CONNECTION) {
1175 u8 ctrl2 = SL811HS_CTL2_INIT;
1176
1177 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1178 #ifdef USE_B
1179 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1180 #endif
1181 if (sl811->port1 & USB_PORT_STAT_LOW_SPEED) {
1182 sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1183 ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1184 }
1185
1186 /* start SOFs flowing, kickstarting with A registers */
1187 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1188 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1189 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1190
1191 /* autoincrementing */
1192 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1193 writeb(SL_SOF, sl811->data_reg);
1194 writeb(0, sl811->data_reg);
1195 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1196 SL11H_HCTLMASK_ARM);
1197
1198 /* khubd provides debounce delay */
1199 } else {
1200 sl811->ctrl1 = 0;
1201 }
1202 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1203
1204 /* reenable irqs */
1205 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1206 spin_unlock_irqrestore(&sl811->lock, flags);
1207 }
1208
1209 static int
1210 sl811h_hub_control(
1211 struct usb_hcd *hcd,
1212 u16 typeReq,
1213 u16 wValue,
1214 u16 wIndex,
1215 char *buf,
1216 u16 wLength
1217 ) {
1218 struct sl811 *sl811 = hcd_to_sl811(hcd);
1219 int retval = 0;
1220 unsigned long flags;
1221
1222 spin_lock_irqsave(&sl811->lock, flags);
1223
1224 switch (typeReq) {
1225 case ClearHubFeature:
1226 case SetHubFeature:
1227 switch (wValue) {
1228 case C_HUB_OVER_CURRENT:
1229 case C_HUB_LOCAL_POWER:
1230 break;
1231 default:
1232 goto error;
1233 }
1234 break;
1235 case ClearPortFeature:
1236 if (wIndex != 1 || wLength != 0)
1237 goto error;
1238
1239 switch (wValue) {
1240 case USB_PORT_FEAT_ENABLE:
1241 sl811->port1 &= USB_PORT_STAT_POWER;
1242 sl811->ctrl1 = 0;
1243 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1244 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1245 sl811_write(sl811, SL11H_IRQ_ENABLE,
1246 sl811->irq_enable);
1247 break;
1248 case USB_PORT_FEAT_SUSPEND:
1249 if (!(sl811->port1 & USB_PORT_STAT_SUSPEND))
1250 break;
1251
1252 /* 20 msec of resume/K signaling, other irqs blocked */
1253 DBG("start resume...\n");
1254 sl811->irq_enable = 0;
1255 sl811_write(sl811, SL11H_IRQ_ENABLE,
1256 sl811->irq_enable);
1257 sl811->ctrl1 |= SL11H_CTL1MASK_K;
1258 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1259
1260 mod_timer(&sl811->timer, jiffies
1261 + msecs_to_jiffies(20));
1262 break;
1263 case USB_PORT_FEAT_POWER:
1264 port_power(sl811, 0);
1265 break;
1266 case USB_PORT_FEAT_C_ENABLE:
1267 case USB_PORT_FEAT_C_SUSPEND:
1268 case USB_PORT_FEAT_C_CONNECTION:
1269 case USB_PORT_FEAT_C_OVER_CURRENT:
1270 case USB_PORT_FEAT_C_RESET:
1271 break;
1272 default:
1273 goto error;
1274 }
1275 sl811->port1 &= ~(1 << wValue);
1276 break;
1277 case GetHubDescriptor:
1278 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1279 break;
1280 case GetHubStatus:
1281 put_unaligned_le32(0, buf);
1282 break;
1283 case GetPortStatus:
1284 if (wIndex != 1)
1285 goto error;
1286 put_unaligned_le32(sl811->port1, buf);
1287
1288 #ifndef VERBOSE
1289 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
1290 #endif
1291 DBG("GetPortStatus %08x\n", sl811->port1);
1292 break;
1293 case SetPortFeature:
1294 if (wIndex != 1 || wLength != 0)
1295 goto error;
1296 switch (wValue) {
1297 case USB_PORT_FEAT_SUSPEND:
1298 if (sl811->port1 & USB_PORT_STAT_RESET)
1299 goto error;
1300 if (!(sl811->port1 & USB_PORT_STAT_ENABLE))
1301 goto error;
1302
1303 DBG("suspend...\n");
1304 sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1305 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1306 break;
1307 case USB_PORT_FEAT_POWER:
1308 port_power(sl811, 1);
1309 break;
1310 case USB_PORT_FEAT_RESET:
1311 if (sl811->port1 & USB_PORT_STAT_SUSPEND)
1312 goto error;
1313 if (!(sl811->port1 & USB_PORT_STAT_POWER))
1314 break;
1315
1316 /* 50 msec of reset/SE0 signaling, irqs blocked */
1317 sl811->irq_enable = 0;
1318 sl811_write(sl811, SL11H_IRQ_ENABLE,
1319 sl811->irq_enable);
1320 sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1321 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1322 sl811->port1 |= USB_PORT_STAT_RESET;
1323 mod_timer(&sl811->timer, jiffies
1324 + msecs_to_jiffies(50));
1325 break;
1326 default:
1327 goto error;
1328 }
1329 sl811->port1 |= 1 << wValue;
1330 break;
1331
1332 default:
1333 error:
1334 /* "protocol stall" on error */
1335 retval = -EPIPE;
1336 }
1337
1338 spin_unlock_irqrestore(&sl811->lock, flags);
1339 return retval;
1340 }
1341
1342 #ifdef CONFIG_PM
1343
1344 static int
1345 sl811h_bus_suspend(struct usb_hcd *hcd)
1346 {
1347 // SOFs off
1348 DBG("%s\n", __func__);
1349 return 0;
1350 }
1351
1352 static int
1353 sl811h_bus_resume(struct usb_hcd *hcd)
1354 {
1355 // SOFs on
1356 DBG("%s\n", __func__);
1357 return 0;
1358 }
1359
1360 #else
1361
1362 #define sl811h_bus_suspend NULL
1363 #define sl811h_bus_resume NULL
1364
1365 #endif
1366
1367
1368 /*-------------------------------------------------------------------------*/
1369
1370 #ifdef STUB_DEBUG_FILE
1371
1372 static inline void create_debug_file(struct sl811 *sl811) { }
1373 static inline void remove_debug_file(struct sl811 *sl811) { }
1374
1375 #else
1376
1377 #include <linux/proc_fs.h>
1378 #include <linux/seq_file.h>
1379
1380 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1381 {
1382 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1383 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1384 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1385 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1386 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1387 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1388 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1389 }
1390
1391 static int proc_sl811h_show(struct seq_file *s, void *unused)
1392 {
1393 struct sl811 *sl811 = s->private;
1394 struct sl811h_ep *ep;
1395 unsigned i;
1396
1397 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1398 sl811_to_hcd(sl811)->product_desc,
1399 hcd_name, DRIVER_VERSION,
1400 sl811->port1);
1401
1402 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1403 seq_printf(s, "current session: done_a %ld done_b %ld "
1404 "wake %ld sof %ld overrun %ld lost %ld\n\n",
1405 sl811->stat_a, sl811->stat_b,
1406 sl811->stat_wake, sl811->stat_sof,
1407 sl811->stat_overrun, sl811->stat_lost);
1408
1409 spin_lock_irq(&sl811->lock);
1410
1411 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1412 seq_printf(s, "(suspended)\n\n");
1413 else {
1414 u8 t = sl811_read(sl811, SL11H_CTLREG1);
1415
1416 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1417 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1418 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1419 case SL11H_CTL1MASK_NORMAL: s = ""; break;
1420 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1421 case SL11H_CTL1MASK_K: s = " k/resume"; break;
1422 default: s = "j"; break;
1423 }; s; }),
1424 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1425 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1426
1427 dump_irq(s, "irq_enable",
1428 sl811_read(sl811, SL11H_IRQ_ENABLE));
1429 dump_irq(s, "irq_status",
1430 sl811_read(sl811, SL11H_IRQ_STATUS));
1431 seq_printf(s, "frame clocks remaining: %d\n",
1432 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1433 }
1434
1435 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1436 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1437 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1438 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1439 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1440 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1441 seq_printf(s, "\n");
1442 list_for_each_entry (ep, &sl811->async, schedule) {
1443 struct urb *urb;
1444
1445 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1446 " nak %d err %d\n",
1447 (ep == sl811->active_a) ? "(A) " : "",
1448 (ep == sl811->active_b) ? "(B) " : "",
1449 ep, ep->epnum,
1450 ({ char *s; switch (ep->nextpid) {
1451 case USB_PID_IN: s = "in"; break;
1452 case USB_PID_OUT: s = "out"; break;
1453 case USB_PID_SETUP: s = "setup"; break;
1454 case USB_PID_ACK: s = "status"; break;
1455 default: s = "?"; break;
1456 }; s;}),
1457 ep->maxpacket,
1458 ep->nak_count, ep->error_count);
1459 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1460 seq_printf(s, " urb%p, %d/%d\n", urb,
1461 urb->actual_length,
1462 urb->transfer_buffer_length);
1463 }
1464 }
1465 if (!list_empty(&sl811->async))
1466 seq_printf(s, "\n");
1467
1468 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1469
1470 for (i = 0; i < PERIODIC_SIZE; i++) {
1471 ep = sl811->periodic[i];
1472 if (!ep)
1473 continue;
1474 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1475
1476 /* DUMB: prints shared entries multiple times */
1477 do {
1478 seq_printf(s,
1479 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1480 "err %d\n",
1481 (ep == sl811->active_a) ? "(A) " : "",
1482 (ep == sl811->active_b) ? "(B) " : "",
1483 ep->period, ep,
1484 (ep->udev->speed == USB_SPEED_FULL)
1485 ? "" : "ls ",
1486 ep->udev->devnum, ep->epnum,
1487 (ep->epnum == 0) ? ""
1488 : ((ep->nextpid == USB_PID_IN)
1489 ? "in"
1490 : "out"),
1491 ep->maxpacket, ep->error_count);
1492 ep = ep->next;
1493 } while (ep);
1494 }
1495
1496 spin_unlock_irq(&sl811->lock);
1497 seq_printf(s, "\n");
1498
1499 return 0;
1500 }
1501
1502 static int proc_sl811h_open(struct inode *inode, struct file *file)
1503 {
1504 return single_open(file, proc_sl811h_show, PDE(inode)->data);
1505 }
1506
1507 static const struct file_operations proc_ops = {
1508 .open = proc_sl811h_open,
1509 .read = seq_read,
1510 .llseek = seq_lseek,
1511 .release = single_release,
1512 };
1513
1514 /* expect just one sl811 per system */
1515 static const char proc_filename[] = "driver/sl811h";
1516
1517 static void create_debug_file(struct sl811 *sl811)
1518 {
1519 sl811->pde = proc_create_data(proc_filename, 0, NULL, &proc_ops, sl811);
1520 }
1521
1522 static void remove_debug_file(struct sl811 *sl811)
1523 {
1524 if (sl811->pde)
1525 remove_proc_entry(proc_filename, NULL);
1526 }
1527
1528 #endif
1529
1530 /*-------------------------------------------------------------------------*/
1531
1532 static void
1533 sl811h_stop(struct usb_hcd *hcd)
1534 {
1535 struct sl811 *sl811 = hcd_to_sl811(hcd);
1536 unsigned long flags;
1537
1538 del_timer_sync(&hcd->rh_timer);
1539
1540 spin_lock_irqsave(&sl811->lock, flags);
1541 port_power(sl811, 0);
1542 spin_unlock_irqrestore(&sl811->lock, flags);
1543 }
1544
1545 static int
1546 sl811h_start(struct usb_hcd *hcd)
1547 {
1548 struct sl811 *sl811 = hcd_to_sl811(hcd);
1549
1550 /* chip has been reset, VBUS power is off */
1551 hcd->state = HC_STATE_RUNNING;
1552
1553 if (sl811->board) {
1554 if (!device_can_wakeup(hcd->self.controller))
1555 device_init_wakeup(hcd->self.controller,
1556 sl811->board->can_wakeup);
1557 hcd->power_budget = sl811->board->power * 2;
1558 }
1559
1560 /* enable power and interrupts */
1561 port_power(sl811, 1);
1562
1563 return 0;
1564 }
1565
1566 /*-------------------------------------------------------------------------*/
1567
1568 static struct hc_driver sl811h_hc_driver = {
1569 .description = hcd_name,
1570 .hcd_priv_size = sizeof(struct sl811),
1571
1572 /*
1573 * generic hardware linkage
1574 */
1575 .irq = sl811h_irq,
1576 .flags = HCD_USB11 | HCD_MEMORY,
1577
1578 /* Basic lifecycle operations */
1579 .start = sl811h_start,
1580 .stop = sl811h_stop,
1581
1582 /*
1583 * managing i/o requests and associated device resources
1584 */
1585 .urb_enqueue = sl811h_urb_enqueue,
1586 .urb_dequeue = sl811h_urb_dequeue,
1587 .endpoint_disable = sl811h_endpoint_disable,
1588
1589 /*
1590 * periodic schedule support
1591 */
1592 .get_frame_number = sl811h_get_frame,
1593
1594 /*
1595 * root hub support
1596 */
1597 .hub_status_data = sl811h_hub_status_data,
1598 .hub_control = sl811h_hub_control,
1599 .bus_suspend = sl811h_bus_suspend,
1600 .bus_resume = sl811h_bus_resume,
1601 };
1602
1603 /*-------------------------------------------------------------------------*/
1604
1605 static int __devexit
1606 sl811h_remove(struct platform_device *dev)
1607 {
1608 struct usb_hcd *hcd = platform_get_drvdata(dev);
1609 struct sl811 *sl811 = hcd_to_sl811(hcd);
1610 struct resource *res;
1611
1612 remove_debug_file(sl811);
1613 usb_remove_hcd(hcd);
1614
1615 /* some platforms may use IORESOURCE_IO */
1616 res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1617 if (res)
1618 iounmap(sl811->data_reg);
1619
1620 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1621 if (res)
1622 iounmap(sl811->addr_reg);
1623
1624 usb_put_hcd(hcd);
1625 return 0;
1626 }
1627
1628 static int __devinit
1629 sl811h_probe(struct platform_device *dev)
1630 {
1631 struct usb_hcd *hcd;
1632 struct sl811 *sl811;
1633 struct resource *addr, *data, *ires;
1634 int irq;
1635 void __iomem *addr_reg;
1636 void __iomem *data_reg;
1637 int retval;
1638 u8 tmp, ioaddr = 0;
1639 unsigned long irqflags;
1640
1641 /* basic sanity checks first. board-specific init logic should
1642 * have initialized these three resources and probably board
1643 * specific platform_data. we don't probe for IRQs, and do only
1644 * minimal sanity checking.
1645 */
1646 ires = platform_get_resource(dev, IORESOURCE_IRQ, 0);
1647 if (dev->num_resources < 3 || !ires)
1648 return -ENODEV;
1649
1650 irq = ires->start;
1651 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1652
1653 /* refuse to confuse usbcore */
1654 if (dev->dev.dma_mask) {
1655 DBG("no we won't dma\n");
1656 return -EINVAL;
1657 }
1658
1659 /* the chip may be wired for either kind of addressing */
1660 addr = platform_get_resource(dev, IORESOURCE_MEM, 0);
1661 data = platform_get_resource(dev, IORESOURCE_MEM, 1);
1662 retval = -EBUSY;
1663 if (!addr || !data) {
1664 addr = platform_get_resource(dev, IORESOURCE_IO, 0);
1665 data = platform_get_resource(dev, IORESOURCE_IO, 1);
1666 if (!addr || !data)
1667 return -ENODEV;
1668 ioaddr = 1;
1669 /*
1670 * NOTE: 64-bit resource->start is getting truncated
1671 * to avoid compiler warning, assuming that ->start
1672 * is always 32-bit for this case
1673 */
1674 addr_reg = (void __iomem *) (unsigned long) addr->start;
1675 data_reg = (void __iomem *) (unsigned long) data->start;
1676 } else {
1677 addr_reg = ioremap(addr->start, 1);
1678 if (addr_reg == NULL) {
1679 retval = -ENOMEM;
1680 goto err2;
1681 }
1682
1683 data_reg = ioremap(data->start, 1);
1684 if (data_reg == NULL) {
1685 retval = -ENOMEM;
1686 goto err4;
1687 }
1688 }
1689
1690 /* allocate and initialize hcd */
1691 hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev));
1692 if (!hcd) {
1693 retval = -ENOMEM;
1694 goto err5;
1695 }
1696 hcd->rsrc_start = addr->start;
1697 sl811 = hcd_to_sl811(hcd);
1698
1699 spin_lock_init(&sl811->lock);
1700 INIT_LIST_HEAD(&sl811->async);
1701 sl811->board = dev->dev.platform_data;
1702 init_timer(&sl811->timer);
1703 sl811->timer.function = sl811h_timer;
1704 sl811->timer.data = (unsigned long) sl811;
1705 sl811->addr_reg = addr_reg;
1706 sl811->data_reg = data_reg;
1707
1708 spin_lock_irq(&sl811->lock);
1709 port_power(sl811, 0);
1710 spin_unlock_irq(&sl811->lock);
1711 msleep(200);
1712
1713 tmp = sl811_read(sl811, SL11H_HWREVREG);
1714 switch (tmp >> 4) {
1715 case 1:
1716 hcd->product_desc = "SL811HS v1.2";
1717 break;
1718 case 2:
1719 hcd->product_desc = "SL811HS v1.5";
1720 break;
1721 default:
1722 /* reject case 0, SL11S is less functional */
1723 DBG("chiprev %02x\n", tmp);
1724 retval = -ENXIO;
1725 goto err6;
1726 }
1727
1728 /* The chip's IRQ is level triggered, active high. A requirement
1729 * for platform device setup is to cope with things like signal
1730 * inverters (e.g. CF is active low) or working only with edge
1731 * triggers (e.g. most ARM CPUs). Initial driver stress testing
1732 * was on a system with single edge triggering, so most sorts of
1733 * triggering arrangement should work.
1734 *
1735 * Use resource IRQ flags if set by platform device setup.
1736 */
1737 irqflags |= IRQF_SHARED;
1738 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | irqflags);
1739 if (retval != 0)
1740 goto err6;
1741
1742 create_debug_file(sl811);
1743 return retval;
1744
1745 err6:
1746 usb_put_hcd(hcd);
1747 err5:
1748 if (!ioaddr)
1749 iounmap(data_reg);
1750 err4:
1751 if (!ioaddr)
1752 iounmap(addr_reg);
1753 err2:
1754 DBG("init error, %d\n", retval);
1755 return retval;
1756 }
1757
1758 #ifdef CONFIG_PM
1759
1760 /* for this device there's no useful distinction between the controller
1761 * and its root hub, except that the root hub only gets direct PM calls
1762 * when CONFIG_USB_SUSPEND is enabled.
1763 */
1764
1765 static int
1766 sl811h_suspend(struct platform_device *dev, pm_message_t state)
1767 {
1768 struct usb_hcd *hcd = platform_get_drvdata(dev);
1769 struct sl811 *sl811 = hcd_to_sl811(hcd);
1770 int retval = 0;
1771
1772 switch (state.event) {
1773 case PM_EVENT_FREEZE:
1774 retval = sl811h_bus_suspend(hcd);
1775 break;
1776 case PM_EVENT_SUSPEND:
1777 case PM_EVENT_HIBERNATE:
1778 case PM_EVENT_PRETHAW: /* explicitly discard hw state */
1779 port_power(sl811, 0);
1780 break;
1781 }
1782 return retval;
1783 }
1784
1785 static int
1786 sl811h_resume(struct platform_device *dev)
1787 {
1788 struct usb_hcd *hcd = platform_get_drvdata(dev);
1789 struct sl811 *sl811 = hcd_to_sl811(hcd);
1790
1791 /* with no "check to see if VBUS is still powered" board hook,
1792 * let's assume it'd only be powered to enable remote wakeup.
1793 */
1794 if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) {
1795 sl811->port1 = 0;
1796 port_power(sl811, 1);
1797 usb_root_hub_lost_power(hcd->self.root_hub);
1798 return 0;
1799 }
1800
1801 return sl811h_bus_resume(hcd);
1802 }
1803
1804 #else
1805
1806 #define sl811h_suspend NULL
1807 #define sl811h_resume NULL
1808
1809 #endif
1810
1811
1812 /* this driver is exported so sl811_cs can depend on it */
1813 struct platform_driver sl811h_driver = {
1814 .probe = sl811h_probe,
1815 .remove = __devexit_p(sl811h_remove),
1816
1817 .suspend = sl811h_suspend,
1818 .resume = sl811h_resume,
1819 .driver = {
1820 .name = (char *) hcd_name,
1821 .owner = THIS_MODULE,
1822 },
1823 };
1824 EXPORT_SYMBOL(sl811h_driver);
1825
1826 /*-------------------------------------------------------------------------*/
1827
1828 static int __init sl811h_init(void)
1829 {
1830 if (usb_disabled())
1831 return -ENODEV;
1832
1833 INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1834 return platform_driver_register(&sl811h_driver);
1835 }
1836 module_init(sl811h_init);
1837
1838 static void __exit sl811h_cleanup(void)
1839 {
1840 platform_driver_unregister(&sl811h_driver);
1841 }
1842 module_exit(sl811h_cleanup);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree