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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / usb / host / sl811-hcd.c
bloba374b7692073596e2679812fa26b807744234ef1
1 /*
2 * SL811HS HCD (Host Controller Driver) for USB.
3 *
4 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
5 * Copyright (C) 2004 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/config.h>
35
36 #ifdef CONFIG_USB_DEBUG
37 # define DEBUG
38 #else
39 # undef DEBUG
40 #endif
41
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <linux/kernel.h>
45 #include <linux/delay.h>
46 #include <linux/ioport.h>
47 #include <linux/sched.h>
48 #include <linux/slab.h>
49 #include <linux/smp_lock.h>
50 #include <linux/errno.h>
51 #include <linux/init.h>
52 #include <linux/timer.h>
53 #include <linux/list.h>
54 #include <linux/interrupt.h>
55 #include <linux/usb.h>
56 #include <linux/usb_sl811.h>
57
58 #include <asm/io.h>
59 #include <asm/irq.h>
60 #include <asm/system.h>
61 #include <asm/byteorder.h>
62
63 #include "../core/hcd.h"
64 #include "sl811.h"
65
66
67 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
68 MODULE_LICENSE("GPL");
69
70 #define DRIVER_VERSION "15 Dec 2004"
71
72
73 #ifndef DEBUG
74 # define STUB_DEBUG_FILE
75 #endif
76
77 /* for now, use only one transfer register bank */
78 #undef USE_B
79
80 /* this doesn't understand urb->iso_frame_desc[], but if you had a driver
81 * that just queued one ISO frame per URB then iso transfers "should" work
82 * using the normal urb status fields.
83 */
84 #define DISABLE_ISO
85
86 // #define QUIRK2
87 #define QUIRK3
88
89 static const char hcd_name[] = "sl811-hcd";
90
91 /*-------------------------------------------------------------------------*/
92
93 static void port_power(struct sl811 *sl811, int is_on)
94 {
95 struct usb_hcd *hcd = sl811_to_hcd(sl811);
96
97 /* hub is inactive unless the port is powered */
98 if (is_on) {
99 if (sl811->port1 & (1 << USB_PORT_FEAT_POWER))
100 return;
101
102 sl811->port1 = (1 << USB_PORT_FEAT_POWER);
103 sl811->irq_enable = SL11H_INTMASK_INSRMV;
104 hcd->self.controller->power.power_state = PMSG_ON;
105 } else {
106 sl811->port1 = 0;
107 sl811->irq_enable = 0;
108 hcd->state = HC_STATE_HALT;
109 hcd->self.controller->power.power_state = PMSG_SUSPEND;
110 }
111 sl811->ctrl1 = 0;
112 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
113 sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
114
115 if (sl811->board && sl811->board->port_power) {
116 /* switch VBUS, at 500mA unless hub power budget gets set */
117 DBG("power %s\n", is_on ? "on" : "off");
118 sl811->board->port_power(hcd->self.controller, is_on);
119 }
120
121 /* reset as thoroughly as we can */
122 if (sl811->board && sl811->board->reset)
123 sl811->board->reset(hcd->self.controller);
124
125 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
126 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
127 sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
128 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
129
130 // if !is_on, put into lowpower mode now
131 }
132
133 /*-------------------------------------------------------------------------*/
134
135 /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue,
136 * and may start I/O. Endpoint queues are scanned during completion irq
137 * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation.
138 *
139 * Using an external DMA engine to copy a packet at a time could work,
140 * though setup/teardown costs may be too big to make it worthwhile.
141 */
142
143 /* SETUP starts a new control request. Devices are not allowed to
144 * STALL or NAK these; they must cancel any pending control requests.
145 */
146 static void setup_packet(
147 struct sl811 *sl811,
148 struct sl811h_ep *ep,
149 struct urb *urb,
150 u8 bank,
151 u8 control
152 )
153 {
154 u8 addr;
155 u8 len;
156 void __iomem *data_reg;
157
158 addr = SL811HS_PACKET_BUF(bank == 0);
159 len = sizeof(struct usb_ctrlrequest);
160 data_reg = sl811->data_reg;
161 sl811_write_buf(sl811, addr, urb->setup_packet, len);
162
163 /* autoincrementing */
164 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
165 writeb(len, data_reg);
166 writeb(SL_SETUP /* | ep->epnum */, data_reg);
167 writeb(usb_pipedevice(urb->pipe), data_reg);
168
169 /* always OUT/data0 */ ;
170 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
171 control | SL11H_HCTLMASK_OUT);
172 ep->length = 0;
173 PACKET("SETUP qh%p\n", ep);
174 }
175
176 /* STATUS finishes control requests, often after IN or OUT data packets */
177 static void status_packet(
178 struct sl811 *sl811,
179 struct sl811h_ep *ep,
180 struct urb *urb,
181 u8 bank,
182 u8 control
183 )
184 {
185 int do_out;
186 void __iomem *data_reg;
187
188 do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
189 data_reg = sl811->data_reg;
190
191 /* autoincrementing */
192 sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
193 writeb(0, data_reg);
194 writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
195 writeb(usb_pipedevice(urb->pipe), data_reg);
196
197 /* always data1; sometimes IN */
198 control |= SL11H_HCTLMASK_TOGGLE;
199 if (do_out)
200 control |= SL11H_HCTLMASK_OUT;
201 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
202 ep->length = 0;
203 PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
204 do_out ? "out" : "in", ep);
205 }
206
207 /* IN packets can be used with any type of endpoint. here we just
208 * start the transfer, data from the peripheral may arrive later.
209 * urb->iso_frame_desc is currently ignored here...
210 */
211 static void in_packet(
212 struct sl811 *sl811,
213 struct sl811h_ep *ep,
214 struct urb *urb,
215 u8 bank,
216 u8 control
217 )
218 {
219 u8 addr;
220 u8 len;
221 void __iomem *data_reg;
222
223 /* avoid losing data on overflow */
224 len = ep->maxpacket;
225 addr = SL811HS_PACKET_BUF(bank == 0);
226 if (!(control & SL11H_HCTLMASK_ISOCH)
227 && usb_gettoggle(urb->dev, ep->epnum, 0))
228 control |= SL11H_HCTLMASK_TOGGLE;
229 data_reg = sl811->data_reg;
230
231 /* autoincrementing */
232 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
233 writeb(len, data_reg);
234 writeb(SL_IN | ep->epnum, data_reg);
235 writeb(usb_pipedevice(urb->pipe), data_reg);
236
237 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
238 ep->length = min((int)len,
239 urb->transfer_buffer_length - urb->actual_length);
240 PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
241 !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
242 }
243
244 /* OUT packets can be used with any type of endpoint.
245 * urb->iso_frame_desc is currently ignored here...
246 */
247 static void out_packet(
248 struct sl811 *sl811,
249 struct sl811h_ep *ep,
250 struct urb *urb,
251 u8 bank,
252 u8 control
253 )
254 {
255 void *buf;
256 u8 addr;
257 u8 len;
258 void __iomem *data_reg;
259
260 buf = urb->transfer_buffer + urb->actual_length;
261 prefetch(buf);
262
263 len = min((int)ep->maxpacket,
264 urb->transfer_buffer_length - urb->actual_length);
265
266 if (!(control & SL11H_HCTLMASK_ISOCH)
267 && usb_gettoggle(urb->dev, ep->epnum, 1))
268 control |= SL11H_HCTLMASK_TOGGLE;
269 addr = SL811HS_PACKET_BUF(bank == 0);
270 data_reg = sl811->data_reg;
271
272 sl811_write_buf(sl811, addr, buf, len);
273
274 /* autoincrementing */
275 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
276 writeb(len, data_reg);
277 writeb(SL_OUT | ep->epnum, data_reg);
278 writeb(usb_pipedevice(urb->pipe), data_reg);
279
280 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
281 control | SL11H_HCTLMASK_OUT);
282 ep->length = len;
283 PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
284 !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
285 }
286
287 /*-------------------------------------------------------------------------*/
288
289 /* caller updates on-chip enables later */
290
291 static inline void sofirq_on(struct sl811 *sl811)
292 {
293 if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
294 return;
295 VDBG("sof irq on\n");
296 sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
297 }
298
299 static inline void sofirq_off(struct sl811 *sl811)
300 {
301 if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
302 return;
303 VDBG("sof irq off\n");
304 sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
305 }
306
307 /*-------------------------------------------------------------------------*/
308
309 /* pick the next endpoint for a transaction, and issue it.
310 * frames start with periodic transfers (after whatever is pending
311 * from the previous frame), and the rest of the time is async
312 * transfers, scheduled round-robin.
313 */
314 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
315 {
316 struct sl811h_ep *ep;
317 struct urb *urb;
318 int fclock;
319 u8 control;
320
321 /* use endpoint at schedule head */
322 if (sl811->next_periodic) {
323 ep = sl811->next_periodic;
324 sl811->next_periodic = ep->next;
325 } else {
326 if (sl811->next_async)
327 ep = sl811->next_async;
328 else if (!list_empty(&sl811->async))
329 ep = container_of(sl811->async.next,
330 struct sl811h_ep, schedule);
331 else {
332 /* could set up the first fullspeed periodic
333 * transfer for the next frame ...
334 */
335 return NULL;
336 }
337
338 #ifdef USE_B
339 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
340 return NULL;
341 #endif
342
343 if (ep->schedule.next == &sl811->async)
344 sl811->next_async = NULL;
345 else
346 sl811->next_async = container_of(ep->schedule.next,
347 struct sl811h_ep, schedule);
348 }
349
350 if (unlikely(list_empty(&ep->hep->urb_list))) {
351 DBG("empty %p queue?\n", ep);
352 return NULL;
353 }
354
355 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
356 control = ep->defctrl;
357
358 /* if this frame doesn't have enough time left to transfer this
359 * packet, wait till the next frame. too-simple algorithm...
360 */
361 fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
362 fclock -= 100; /* setup takes not much time */
363 if (urb->dev->speed == USB_SPEED_LOW) {
364 if (control & SL11H_HCTLMASK_PREAMBLE) {
365 /* also note erratum 1: some hubs won't work */
366 fclock -= 800;
367 }
368 fclock -= ep->maxpacket << 8;
369
370 /* erratum 2: AFTERSOF only works for fullspeed */
371 if (fclock < 0) {
372 if (ep->period)
373 sl811->stat_overrun++;
374 sofirq_on(sl811);
375 return NULL;
376 }
377 } else {
378 fclock -= 12000 / 19; /* 19 64byte packets/msec */
379 if (fclock < 0) {
380 if (ep->period)
381 sl811->stat_overrun++;
382 control |= SL11H_HCTLMASK_AFTERSOF;
383
384 /* throttle bulk/control irq noise */
385 } else if (ep->nak_count)
386 control |= SL11H_HCTLMASK_AFTERSOF;
387 }
388
389
390 switch (ep->nextpid) {
391 case USB_PID_IN:
392 in_packet(sl811, ep, urb, bank, control);
393 break;
394 case USB_PID_OUT:
395 out_packet(sl811, ep, urb, bank, control);
396 break;
397 case USB_PID_SETUP:
398 setup_packet(sl811, ep, urb, bank, control);
399 break;
400 case USB_PID_ACK: /* for control status */
401 status_packet(sl811, ep, urb, bank, control);
402 break;
403 default:
404 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
405 ep = NULL;
406 }
407 return ep;
408 }
409
410 #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
411
412 static inline void start_transfer(struct sl811 *sl811)
413 {
414 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
415 return;
416 if (sl811->active_a == NULL) {
417 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
418 if (sl811->active_a != NULL)
419 sl811->jiffies_a = jiffies + MIN_JIFFIES;
420 }
421 #ifdef USE_B
422 if (sl811->active_b == NULL) {
423 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
424 if (sl811->active_b != NULL)
425 sl811->jiffies_b = jiffies + MIN_JIFFIES;
426 }
427 #endif
428 }
429
430 static void finish_request(
431 struct sl811 *sl811,
432 struct sl811h_ep *ep,
433 struct urb *urb,
434 struct pt_regs *regs,
435 int status
436 ) __releases(sl811->lock) __acquires(sl811->lock)
437 {
438 unsigned i;
439
440 if (usb_pipecontrol(urb->pipe))
441 ep->nextpid = USB_PID_SETUP;
442
443 spin_lock(&urb->lock);
444 if (urb->status == -EINPROGRESS)
445 urb->status = status;
446 spin_unlock(&urb->lock);
447
448 spin_unlock(&sl811->lock);
449 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, regs);
450 spin_lock(&sl811->lock);
451
452 /* leave active endpoints in the schedule */
453 if (!list_empty(&ep->hep->urb_list))
454 return;
455
456 /* async deschedule? */
457 if (!list_empty(&ep->schedule)) {
458 list_del_init(&ep->schedule);
459 if (ep == sl811->next_async)
460 sl811->next_async = NULL;
461 return;
462 }
463
464 /* periodic deschedule */
465 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
466 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
467 struct sl811h_ep *temp;
468 struct sl811h_ep **prev = &sl811->periodic[i];
469
470 while (*prev && ((temp = *prev) != ep))
471 prev = &temp->next;
472 if (*prev)
473 *prev = ep->next;
474 sl811->load[i] -= ep->load;
475 }
476 ep->branch = PERIODIC_SIZE;
477 sl811->periodic_count--;
478 sl811_to_hcd(sl811)->self.bandwidth_allocated
479 -= ep->load / ep->period;
480 if (ep == sl811->next_periodic)
481 sl811->next_periodic = ep->next;
482
483 /* we might turn SOFs back on again for the async schedule */
484 if (sl811->periodic_count == 0)
485 sofirq_off(sl811);
486 }
487
488 static void
489 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank, struct pt_regs *regs)
490 {
491 u8 status;
492 struct urb *urb;
493 int urbstat = -EINPROGRESS;
494
495 if (unlikely(!ep))
496 return;
497
498 status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
499
500 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
501
502 /* we can safely ignore NAKs */
503 if (status & SL11H_STATMASK_NAK) {
504 // PACKET("...NAK_%02x qh%p\n", bank, ep);
505 if (!ep->period)
506 ep->nak_count++;
507 ep->error_count = 0;
508
509 /* ACK advances transfer, toggle, and maybe queue */
510 } else if (status & SL11H_STATMASK_ACK) {
511 struct usb_device *udev = urb->dev;
512 int len;
513 unsigned char *buf;
514
515 /* urb->iso_frame_desc is currently ignored here... */
516
517 ep->nak_count = ep->error_count = 0;
518 switch (ep->nextpid) {
519 case USB_PID_OUT:
520 // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
521 urb->actual_length += ep->length;
522 usb_dotoggle(udev, ep->epnum, 1);
523 if (urb->actual_length
524 == urb->transfer_buffer_length) {
525 if (usb_pipecontrol(urb->pipe))
526 ep->nextpid = USB_PID_ACK;
527
528 /* some bulk protocols terminate OUT transfers
529 * by a short packet, using ZLPs not padding.
530 */
531 else if (ep->length < ep->maxpacket
532 || !(urb->transfer_flags
533 & URB_ZERO_PACKET))
534 urbstat = 0;
535 }
536 break;
537 case USB_PID_IN:
538 // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
539 buf = urb->transfer_buffer + urb->actual_length;
540 prefetchw(buf);
541 len = ep->maxpacket - sl811_read(sl811,
542 bank + SL11H_XFERCNTREG);
543 if (len > ep->length) {
544 len = ep->length;
545 urb->status = -EOVERFLOW;
546 }
547 urb->actual_length += len;
548 sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
549 buf, len);
550 usb_dotoggle(udev, ep->epnum, 0);
551 if (urb->actual_length == urb->transfer_buffer_length)
552 urbstat = 0;
553 else if (len < ep->maxpacket) {
554 if (urb->transfer_flags & URB_SHORT_NOT_OK)
555 urbstat = -EREMOTEIO;
556 else
557 urbstat = 0;
558 }
559 if (usb_pipecontrol(urb->pipe)
560 && (urbstat == -EREMOTEIO
561 || urbstat == 0)) {
562
563 /* NOTE if the status stage STALLs (why?),
564 * this reports the wrong urb status.
565 */
566 spin_lock(&urb->lock);
567 if (urb->status == -EINPROGRESS)
568 urb->status = urbstat;
569 spin_unlock(&urb->lock);
570
571 urb = NULL;
572 ep->nextpid = USB_PID_ACK;
573 }
574 break;
575 case USB_PID_SETUP:
576 // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
577 if (urb->transfer_buffer_length == urb->actual_length)
578 ep->nextpid = USB_PID_ACK;
579 else if (usb_pipeout(urb->pipe)) {
580 usb_settoggle(udev, 0, 1, 1);
581 ep->nextpid = USB_PID_OUT;
582 } else {
583 usb_settoggle(udev, 0, 0, 1);
584 ep->nextpid = USB_PID_IN;
585 }
586 break;
587 case USB_PID_ACK:
588 // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
589 urbstat = 0;
590 break;
591 }
592
593 /* STALL stops all transfers */
594 } else if (status & SL11H_STATMASK_STALL) {
595 PACKET("...STALL_%02x qh%p\n", bank, ep);
596 ep->nak_count = ep->error_count = 0;
597 urbstat = -EPIPE;
598
599 /* error? retry, until "3 strikes" */
600 } else if (++ep->error_count >= 3) {
601 if (status & SL11H_STATMASK_TMOUT)
602 urbstat = -ETIMEDOUT;
603 else if (status & SL11H_STATMASK_OVF)
604 urbstat = -EOVERFLOW;
605 else
606 urbstat = -EPROTO;
607 ep->error_count = 0;
608 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
609 bank, status, ep, urbstat);
610 }
611
612 if (urb && (urbstat != -EINPROGRESS || urb->status != -EINPROGRESS))
613 finish_request(sl811, ep, urb, regs, urbstat);
614 }
615
616 static inline u8 checkdone(struct sl811 *sl811)
617 {
618 u8 ctl;
619 u8 irqstat = 0;
620
621 if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
622 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
623 if (ctl & SL11H_HCTLMASK_ARM)
624 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
625 DBG("%s DONE_A: ctrl %02x sts %02x\n",
626 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
627 ctl,
628 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
629 irqstat |= SL11H_INTMASK_DONE_A;
630 }
631 #ifdef USE_B
632 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
633 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
634 if (ctl & SL11H_HCTLMASK_ARM)
635 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
636 DBG("%s DONE_B: ctrl %02x sts %02x\n",
637 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
638 ctl,
639 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
640 irqstat |= SL11H_INTMASK_DONE_A;
641 }
642 #endif
643 return irqstat;
644 }
645
646 static irqreturn_t sl811h_irq(struct usb_hcd *hcd, struct pt_regs *regs)
647 {
648 struct sl811 *sl811 = hcd_to_sl811(hcd);
649 u8 irqstat;
650 irqreturn_t ret = IRQ_NONE;
651 unsigned retries = 5;
652
653 spin_lock(&sl811->lock);
654
655 retry:
656 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
657 if (irqstat) {
658 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
659 irqstat &= sl811->irq_enable;
660 }
661
662 #ifdef QUIRK2
663 /* this may no longer be necessary ... */
664 if (irqstat == 0 && ret == IRQ_NONE) {
665 irqstat = checkdone(sl811);
666 if (irqstat /* && irq != ~0 */ )
667 sl811->stat_lost++;
668 }
669 #endif
670
671 /* USB packets, not necessarily handled in the order they're
672 * issued ... that's fine if they're different endpoints.
673 */
674 if (irqstat & SL11H_INTMASK_DONE_A) {
675 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF), regs);
676 sl811->active_a = NULL;
677 sl811->stat_a++;
678 }
679 #ifdef USE_B
680 if (irqstat & SL11H_INTMASK_DONE_B) {
681 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF), regs);
682 sl811->active_b = NULL;
683 sl811->stat_b++;
684 }
685 #endif
686 if (irqstat & SL11H_INTMASK_SOFINTR) {
687 unsigned index;
688
689 index = sl811->frame++ % (PERIODIC_SIZE - 1);
690 sl811->stat_sof++;
691
692 /* be graceful about almost-inevitable periodic schedule
693 * overruns: continue the previous frame's transfers iff
694 * this one has nothing scheduled.
695 */
696 if (sl811->next_periodic) {
697 // ERR("overrun to slot %d\n", index);
698 sl811->stat_overrun++;
699 }
700 if (sl811->periodic[index])
701 sl811->next_periodic = sl811->periodic[index];
702 }
703
704 /* khubd manages debouncing and wakeup */
705 if (irqstat & SL11H_INTMASK_INSRMV) {
706 sl811->stat_insrmv++;
707
708 /* most stats are reset for each VBUS session */
709 sl811->stat_wake = 0;
710 sl811->stat_sof = 0;
711 sl811->stat_a = 0;
712 sl811->stat_b = 0;
713 sl811->stat_lost = 0;
714
715 sl811->ctrl1 = 0;
716 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
717
718 sl811->irq_enable = SL11H_INTMASK_INSRMV;
719 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
720
721 /* usbcore nukes other pending transactions on disconnect */
722 if (sl811->active_a) {
723 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
724 finish_request(sl811, sl811->active_a,
725 container_of(sl811->active_a->hep->urb_list.next,
726 struct urb, urb_list),
727 NULL, -ESHUTDOWN);
728 sl811->active_a = NULL;
729 }
730 #ifdef USE_B
731 if (sl811->active_b) {
732 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
733 finish_request(sl811, sl811->active_b,
734 container_of(sl811->active_b->hep->urb_list.next,
735 struct urb, urb_list),
736 NULL, -ESHUTDOWN);
737 sl811->active_b = NULL;
738 }
739 #endif
740
741 /* port status seems weird until after reset, so
742 * force the reset and make khubd clean up later.
743 */
744 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
745 | (1 << USB_PORT_FEAT_CONNECTION);
746
747 } else if (irqstat & SL11H_INTMASK_RD) {
748 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
749 DBG("wakeup\n");
750 sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
751 sl811->stat_wake++;
752 } else
753 irqstat &= ~SL11H_INTMASK_RD;
754 }
755
756 if (irqstat) {
757 if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
758 start_transfer(sl811);
759 ret = IRQ_HANDLED;
760 if (retries--)
761 goto retry;
762 }
763
764 if (sl811->periodic_count == 0 && list_empty(&sl811->async))
765 sofirq_off(sl811);
766 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
767
768 spin_unlock(&sl811->lock);
769
770 return ret;
771 }
772
773 /*-------------------------------------------------------------------------*/
774
775 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
776 * this driver doesn't promise that much since it's got to handle an
777 * IRQ per packet; irq handling latencies also use up that time.
778 */
779 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
780
781 static int balance(struct sl811 *sl811, u16 period, u16 load)
782 {
783 int i, branch = -ENOSPC;
784
785 /* search for the least loaded schedule branch of that period
786 * which has enough bandwidth left unreserved.
787 */
788 for (i = 0; i < period ; i++) {
789 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
790 int j;
791
792 for (j = i; j < PERIODIC_SIZE; j += period) {
793 if ((sl811->load[j] + load)
794 > MAX_PERIODIC_LOAD)
795 break;
796 }
797 if (j < PERIODIC_SIZE)
798 continue;
799 branch = i;
800 }
801 }
802 return branch;
803 }
804
805 /*-------------------------------------------------------------------------*/
806
807 static int sl811h_urb_enqueue(
808 struct usb_hcd *hcd,
809 struct usb_host_endpoint *hep,
810 struct urb *urb,
811 int mem_flags
812 ) {
813 struct sl811 *sl811 = hcd_to_sl811(hcd);
814 struct usb_device *udev = urb->dev;
815 unsigned int pipe = urb->pipe;
816 int is_out = !usb_pipein(pipe);
817 int type = usb_pipetype(pipe);
818 int epnum = usb_pipeendpoint(pipe);
819 struct sl811h_ep *ep = NULL;
820 unsigned long flags;
821 int i;
822 int retval = 0;
823
824 #ifdef DISABLE_ISO
825 if (type == PIPE_ISOCHRONOUS)
826 return -ENOSPC;
827 #endif
828
829 /* avoid all allocations within spinlocks */
830 if (!hep->hcpriv)
831 ep = kcalloc(1, sizeof *ep, mem_flags);
832
833 spin_lock_irqsave(&sl811->lock, flags);
834
835 /* don't submit to a dead or disabled port */
836 if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
837 || !HC_IS_RUNNING(hcd->state)) {
838 retval = -ENODEV;
839 goto fail;
840 }
841
842 if (hep->hcpriv) {
843 kfree(ep);
844 ep = hep->hcpriv;
845 } else if (!ep) {
846 retval = -ENOMEM;
847 goto fail;
848
849 } else {
850 INIT_LIST_HEAD(&ep->schedule);
851 ep->udev = usb_get_dev(udev);
852 ep->epnum = epnum;
853 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
854 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
855 usb_settoggle(udev, epnum, is_out, 0);
856
857 if (type == PIPE_CONTROL)
858 ep->nextpid = USB_PID_SETUP;
859 else if (is_out)
860 ep->nextpid = USB_PID_OUT;
861 else
862 ep->nextpid = USB_PID_IN;
863
864 if (ep->maxpacket > H_MAXPACKET) {
865 /* iso packets up to 240 bytes could work... */
866 DBG("dev %d ep%d maxpacket %d\n",
867 udev->devnum, epnum, ep->maxpacket);
868 retval = -EINVAL;
869 goto fail;
870 }
871
872 if (udev->speed == USB_SPEED_LOW) {
873 /* send preamble for external hub? */
874 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
875 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
876 }
877 switch (type) {
878 case PIPE_ISOCHRONOUS:
879 case PIPE_INTERRUPT:
880 if (urb->interval > PERIODIC_SIZE)
881 urb->interval = PERIODIC_SIZE;
882 ep->period = urb->interval;
883 ep->branch = PERIODIC_SIZE;
884 if (type == PIPE_ISOCHRONOUS)
885 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
886 ep->load = usb_calc_bus_time(udev->speed, !is_out,
887 (type == PIPE_ISOCHRONOUS),
888 usb_maxpacket(udev, pipe, is_out))
889 / 1000;
890 break;
891 }
892
893 hep->hcpriv = ep;
894 }
895
896 /* maybe put endpoint into schedule */
897 switch (type) {
898 case PIPE_CONTROL:
899 case PIPE_BULK:
900 if (list_empty(&ep->schedule))
901 list_add_tail(&ep->schedule, &sl811->async);
902 break;
903 case PIPE_ISOCHRONOUS:
904 case PIPE_INTERRUPT:
905 urb->interval = ep->period;
906 if (ep->branch < PERIODIC_SIZE)
907 break;
908
909 retval = balance(sl811, ep->period, ep->load);
910 if (retval < 0)
911 goto fail;
912 ep->branch = retval;
913 retval = 0;
914 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
915 + ep->branch;
916
917 /* sort each schedule branch by period (slow before fast)
918 * to share the faster parts of the tree without needing
919 * dummy/placeholder nodes
920 */
921 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
922 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
923 struct sl811h_ep **prev = &sl811->periodic[i];
924 struct sl811h_ep *here = *prev;
925
926 while (here && ep != here) {
927 if (ep->period > here->period)
928 break;
929 prev = &here->next;
930 here = *prev;
931 }
932 if (ep != here) {
933 ep->next = here;
934 *prev = ep;
935 }
936 sl811->load[i] += ep->load;
937 }
938 sl811->periodic_count++;
939 hcd->self.bandwidth_allocated += ep->load / ep->period;
940 sofirq_on(sl811);
941 }
942
943 /* in case of unlink-during-submit */
944 spin_lock(&urb->lock);
945 if (urb->status != -EINPROGRESS) {
946 spin_unlock(&urb->lock);
947 finish_request(sl811, ep, urb, NULL, 0);
948 retval = 0;
949 goto fail;
950 }
951 urb->hcpriv = hep;
952 spin_unlock(&urb->lock);
953
954 start_transfer(sl811);
955 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
956 fail:
957 spin_unlock_irqrestore(&sl811->lock, flags);
958 return retval;
959 }
960
961 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
962 {
963 struct sl811 *sl811 = hcd_to_sl811(hcd);
964 struct usb_host_endpoint *hep = urb->hcpriv;
965 unsigned long flags;
966 struct sl811h_ep *ep;
967 int retval = 0;
968
969 if (!hep)
970 return -EINVAL;
971
972 spin_lock_irqsave(&sl811->lock, flags);
973 ep = hep->hcpriv;
974 if (ep) {
975 /* finish right away if this urb can't be active ...
976 * note that some drivers wrongly expect delays
977 */
978 if (ep->hep->urb_list.next != &urb->urb_list) {
979 /* not front of queue? never active */
980
981 /* for active transfers, we expect an IRQ */
982 } else if (sl811->active_a == ep) {
983 if (time_before_eq(sl811->jiffies_a, jiffies)) {
984 /* happens a lot with lowspeed?? */
985 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
986 sl811_read(sl811,
987 SL811_EP_A(SL11H_HOSTCTLREG)),
988 sl811_read(sl811,
989 SL811_EP_A(SL11H_PKTSTATREG)));
990 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
991 0);
992 sl811->active_a = NULL;
993 } else
994 urb = NULL;
995 #ifdef USE_B
996 } else if (sl811->active_b == ep) {
997 if (time_before_eq(sl811->jiffies_a, jiffies)) {
998 /* happens a lot with lowspeed?? */
999 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1000 sl811_read(sl811,
1001 SL811_EP_B(SL11H_HOSTCTLREG)),
1002 sl811_read(sl811,
1003 SL811_EP_B(SL11H_PKTSTATREG)));
1004 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1005 0);
1006 sl811->active_b = NULL;
1007 } else
1008 urb = NULL;
1009 #endif
1010 } else {
1011 /* front of queue for inactive endpoint */
1012 }
1013
1014 if (urb)
1015 finish_request(sl811, ep, urb, NULL, 0);
1016 else
1017 VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1018 (sl811->active_a == ep) ? "A" : "B");
1019 } else
1020 retval = -EINVAL;
1021 spin_unlock_irqrestore(&sl811->lock, flags);
1022 return retval;
1023 }
1024
1025 static void
1026 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1027 {
1028 struct sl811h_ep *ep = hep->hcpriv;
1029
1030 if (!ep)
1031 return;
1032
1033 /* assume we'd just wait for the irq */
1034 if (!list_empty(&hep->urb_list))
1035 msleep(3);
1036 if (!list_empty(&hep->urb_list))
1037 WARN("ep %p not empty?\n", ep);
1038
1039 usb_put_dev(ep->udev);
1040 kfree(ep);
1041 hep->hcpriv = NULL;
1042 }
1043
1044 static int
1045 sl811h_get_frame(struct usb_hcd *hcd)
1046 {
1047 struct sl811 *sl811 = hcd_to_sl811(hcd);
1048
1049 /* wrong except while periodic transfers are scheduled;
1050 * never matches the on-the-wire frame;
1051 * subject to overruns.
1052 */
1053 return sl811->frame;
1054 }
1055
1056
1057 /*-------------------------------------------------------------------------*/
1058
1059 /* the virtual root hub timer IRQ checks for hub status */
1060 static int
1061 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1062 {
1063 struct sl811 *sl811 = hcd_to_sl811(hcd);
1064 #ifdef QUIRK3
1065 unsigned long flags;
1066
1067 /* non-SMP HACK: use root hub timer as i/o watchdog
1068 * this seems essential when SOF IRQs aren't in use...
1069 */
1070 local_irq_save(flags);
1071 if (!timer_pending(&sl811->timer)) {
1072 if (sl811h_irq( /* ~0, */ hcd, NULL) != IRQ_NONE)
1073 sl811->stat_lost++;
1074 }
1075 local_irq_restore(flags);
1076 #endif
1077
1078 if (!(sl811->port1 & (0xffff << 16)))
1079 return 0;
1080
1081 /* tell khubd port 1 changed */
1082 *buf = (1 << 1);
1083 return 1;
1084 }
1085
1086 static void
1087 sl811h_hub_descriptor (
1088 struct sl811 *sl811,
1089 struct usb_hub_descriptor *desc
1090 ) {
1091 u16 temp = 0;
1092
1093 desc->bDescriptorType = 0x29;
1094 desc->bHubContrCurrent = 0;
1095
1096 desc->bNbrPorts = 1;
1097 desc->bDescLength = 9;
1098
1099 /* per-port power switching (gang of one!), or none */
1100 desc->bPwrOn2PwrGood = 0;
1101 if (sl811->board && sl811->board->port_power) {
1102 desc->bPwrOn2PwrGood = sl811->board->potpg;
1103 if (!desc->bPwrOn2PwrGood)
1104 desc->bPwrOn2PwrGood = 10;
1105 temp = 0x0001;
1106 } else
1107 temp = 0x0002;
1108
1109 /* no overcurrent errors detection/handling */
1110 temp |= 0x0010;
1111
1112 desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
1113
1114 /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */
1115 desc->bitmap[0] = 1 << 1;
1116 desc->bitmap[1] = ~0;
1117 }
1118
1119 static void
1120 sl811h_timer(unsigned long _sl811)
1121 {
1122 struct sl811 *sl811 = (void *) _sl811;
1123 unsigned long flags;
1124 u8 irqstat;
1125 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1126 const u32 mask = (1 << USB_PORT_FEAT_CONNECTION)
1127 | (1 << USB_PORT_FEAT_ENABLE)
1128 | (1 << USB_PORT_FEAT_LOWSPEED);
1129
1130 spin_lock_irqsave(&sl811->lock, flags);
1131
1132 /* stop special signaling */
1133 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1134 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1135 udelay(3);
1136
1137 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1138
1139 switch (signaling) {
1140 case SL11H_CTL1MASK_SE0:
1141 DBG("end reset\n");
1142 sl811->port1 = (1 << USB_PORT_FEAT_C_RESET)
1143 | (1 << USB_PORT_FEAT_POWER);
1144 sl811->ctrl1 = 0;
1145 /* don't wrongly ack RD */
1146 if (irqstat & SL11H_INTMASK_INSRMV)
1147 irqstat &= ~SL11H_INTMASK_RD;
1148 break;
1149 case SL11H_CTL1MASK_K:
1150 DBG("end resume\n");
1151 sl811->port1 &= ~(1 << USB_PORT_FEAT_SUSPEND);
1152 break;
1153 default:
1154 DBG("odd timer signaling: %02x\n", signaling);
1155 break;
1156 }
1157 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1158
1159 if (irqstat & SL11H_INTMASK_RD) {
1160 /* usbcore nukes all pending transactions on disconnect */
1161 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION))
1162 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
1163 | (1 << USB_PORT_FEAT_C_ENABLE);
1164 sl811->port1 &= ~mask;
1165 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1166 } else {
1167 sl811->port1 |= mask;
1168 if (irqstat & SL11H_INTMASK_DP)
1169 sl811->port1 &= ~(1 << USB_PORT_FEAT_LOWSPEED);
1170 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1171 }
1172
1173 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION)) {
1174 u8 ctrl2 = SL811HS_CTL2_INIT;
1175
1176 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1177 #ifdef USE_B
1178 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1179 #endif
1180 if (sl811->port1 & (1 << USB_PORT_FEAT_LOWSPEED)) {
1181 sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1182 ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1183 }
1184
1185 /* start SOFs flowing, kickstarting with A registers */
1186 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1187 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1188 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1189
1190 /* autoincrementing */
1191 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1192 writeb(SL_SOF, sl811->data_reg);
1193 writeb(0, sl811->data_reg);
1194 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1195 SL11H_HCTLMASK_ARM);
1196
1197 /* khubd provides debounce delay */
1198 } else {
1199 sl811->ctrl1 = 0;
1200 }
1201 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1202
1203 /* reenable irqs */
1204 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1205 spin_unlock_irqrestore(&sl811->lock, flags);
1206 }
1207
1208 static int
1209 sl811h_hub_control(
1210 struct usb_hcd *hcd,
1211 u16 typeReq,
1212 u16 wValue,
1213 u16 wIndex,
1214 char *buf,
1215 u16 wLength
1216 ) {
1217 struct sl811 *sl811 = hcd_to_sl811(hcd);
1218 int retval = 0;
1219 unsigned long flags;
1220
1221 spin_lock_irqsave(&sl811->lock, flags);
1222
1223 switch (typeReq) {
1224 case ClearHubFeature:
1225 case SetHubFeature:
1226 switch (wValue) {
1227 case C_HUB_OVER_CURRENT:
1228 case C_HUB_LOCAL_POWER:
1229 break;
1230 default:
1231 goto error;
1232 }
1233 break;
1234 case ClearPortFeature:
1235 if (wIndex != 1 || wLength != 0)
1236 goto error;
1237
1238 switch (wValue) {
1239 case USB_PORT_FEAT_ENABLE:
1240 sl811->port1 &= (1 << USB_PORT_FEAT_POWER);
1241 sl811->ctrl1 = 0;
1242 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1243 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1244 sl811_write(sl811, SL11H_IRQ_ENABLE,
1245 sl811->irq_enable);
1246 break;
1247 case USB_PORT_FEAT_SUSPEND:
1248 if (!(sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)))
1249 break;
1250
1251 /* 20 msec of resume/K signaling, other irqs blocked */
1252 DBG("start resume...\n");
1253 sl811->irq_enable = 0;
1254 sl811_write(sl811, SL11H_IRQ_ENABLE,
1255 sl811->irq_enable);
1256 sl811->ctrl1 |= SL11H_CTL1MASK_K;
1257 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1258
1259 mod_timer(&sl811->timer, jiffies
1260 + msecs_to_jiffies(20));
1261 break;
1262 case USB_PORT_FEAT_POWER:
1263 port_power(sl811, 0);
1264 break;
1265 case USB_PORT_FEAT_C_ENABLE:
1266 case USB_PORT_FEAT_C_SUSPEND:
1267 case USB_PORT_FEAT_C_CONNECTION:
1268 case USB_PORT_FEAT_C_OVER_CURRENT:
1269 case USB_PORT_FEAT_C_RESET:
1270 break;
1271 default:
1272 goto error;
1273 }
1274 sl811->port1 &= ~(1 << wValue);
1275 break;
1276 case GetHubDescriptor:
1277 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1278 break;
1279 case GetHubStatus:
1280 *(__le32 *) buf = cpu_to_le32(0);
1281 break;
1282 case GetPortStatus:
1283 if (wIndex != 1)
1284 goto error;
1285 *(__le32 *) buf = cpu_to_le32(sl811->port1);
1286
1287 #ifndef VERBOSE
1288 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
1289 #endif
1290 DBG("GetPortStatus %08x\n", sl811->port1);
1291 break;
1292 case SetPortFeature:
1293 if (wIndex != 1 || wLength != 0)
1294 goto error;
1295 switch (wValue) {
1296 case USB_PORT_FEAT_SUSPEND:
1297 if (sl811->port1 & (1 << USB_PORT_FEAT_RESET))
1298 goto error;
1299 if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)))
1300 goto error;
1301
1302 DBG("suspend...\n");
1303 sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1304 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1305 break;
1306 case USB_PORT_FEAT_POWER:
1307 port_power(sl811, 1);
1308 break;
1309 case USB_PORT_FEAT_RESET:
1310 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
1311 goto error;
1312 if (!(sl811->port1 & (1 << USB_PORT_FEAT_POWER)))
1313 break;
1314
1315 /* 50 msec of reset/SE0 signaling, irqs blocked */
1316 sl811->irq_enable = 0;
1317 sl811_write(sl811, SL11H_IRQ_ENABLE,
1318 sl811->irq_enable);
1319 sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1320 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1321 sl811->port1 |= (1 << USB_PORT_FEAT_RESET);
1322 mod_timer(&sl811->timer, jiffies
1323 + msecs_to_jiffies(50));
1324 break;
1325 default:
1326 goto error;
1327 }
1328 sl811->port1 |= 1 << wValue;
1329 break;
1330
1331 default:
1332 error:
1333 /* "protocol stall" on error */
1334 retval = -EPIPE;
1335 }
1336
1337 spin_unlock_irqrestore(&sl811->lock, flags);
1338 return retval;
1339 }
1340
1341 #ifdef CONFIG_PM
1342
1343 static int
1344 sl811h_hub_suspend(struct usb_hcd *hcd)
1345 {
1346 // SOFs off
1347 DBG("%s\n", __FUNCTION__);
1348 return 0;
1349 }
1350
1351 static int
1352 sl811h_hub_resume(struct usb_hcd *hcd)
1353 {
1354 // SOFs on
1355 DBG("%s\n", __FUNCTION__);
1356 return 0;
1357 }
1358
1359 #else
1360
1361 #define sl811h_hub_suspend NULL
1362 #define sl811h_hub_resume NULL
1363
1364 #endif
1365
1366
1367 /*-------------------------------------------------------------------------*/
1368
1369 #ifdef STUB_DEBUG_FILE
1370
1371 static inline void create_debug_file(struct sl811 *sl811) { }
1372 static inline void remove_debug_file(struct sl811 *sl811) { }
1373
1374 #else
1375
1376 #include <linux/proc_fs.h>
1377 #include <linux/seq_file.h>
1378
1379 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1380 {
1381 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1382 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1383 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1384 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1385 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1386 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1387 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1388 }
1389
1390 static int proc_sl811h_show(struct seq_file *s, void *unused)
1391 {
1392 struct sl811 *sl811 = s->private;
1393 struct sl811h_ep *ep;
1394 unsigned i;
1395
1396 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1397 sl811_to_hcd(sl811)->product_desc,
1398 hcd_name, DRIVER_VERSION,
1399 sl811->port1);
1400
1401 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1402 seq_printf(s, "current session: done_a %ld done_b %ld "
1403 "wake %ld sof %ld overrun %ld lost %ld\n\n",
1404 sl811->stat_a, sl811->stat_b,
1405 sl811->stat_wake, sl811->stat_sof,
1406 sl811->stat_overrun, sl811->stat_lost);
1407
1408 spin_lock_irq(&sl811->lock);
1409
1410 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1411 seq_printf(s, "(suspended)\n\n");
1412 else {
1413 u8 t = sl811_read(sl811, SL11H_CTLREG1);
1414
1415 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1416 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1417 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1418 case SL11H_CTL1MASK_NORMAL: s = ""; break;
1419 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1420 case SL11H_CTL1MASK_K: s = " k/resume"; break;
1421 default: s = "j"; break;
1422 }; s; }),
1423 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1424 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1425
1426 dump_irq(s, "irq_enable",
1427 sl811_read(sl811, SL11H_IRQ_ENABLE));
1428 dump_irq(s, "irq_status",
1429 sl811_read(sl811, SL11H_IRQ_STATUS));
1430 seq_printf(s, "frame clocks remaining: %d\n",
1431 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1432 }
1433
1434 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1435 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1436 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1437 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1438 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1439 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1440 seq_printf(s, "\n");
1441 list_for_each_entry (ep, &sl811->async, schedule) {
1442 struct urb *urb;
1443
1444 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1445 " nak %d err %d\n",
1446 (ep == sl811->active_a) ? "(A) " : "",
1447 (ep == sl811->active_b) ? "(B) " : "",
1448 ep, ep->epnum,
1449 ({ char *s; switch (ep->nextpid) {
1450 case USB_PID_IN: s = "in"; break;
1451 case USB_PID_OUT: s = "out"; break;
1452 case USB_PID_SETUP: s = "setup"; break;
1453 case USB_PID_ACK: s = "status"; break;
1454 default: s = "?"; break;
1455 }; s;}),
1456 ep->maxpacket,
1457 ep->nak_count, ep->error_count);
1458 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1459 seq_printf(s, " urb%p, %d/%d\n", urb,
1460 urb->actual_length,
1461 urb->transfer_buffer_length);
1462 }
1463 }
1464 if (!list_empty(&sl811->async))
1465 seq_printf(s, "\n");
1466
1467 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1468
1469 for (i = 0; i < PERIODIC_SIZE; i++) {
1470 ep = sl811->periodic[i];
1471 if (!ep)
1472 continue;
1473 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1474
1475 /* DUMB: prints shared entries multiple times */
1476 do {
1477 seq_printf(s,
1478 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1479 "err %d\n",
1480 (ep == sl811->active_a) ? "(A) " : "",
1481 (ep == sl811->active_b) ? "(B) " : "",
1482 ep->period, ep,
1483 (ep->udev->speed == USB_SPEED_FULL)
1484 ? "" : "ls ",
1485 ep->udev->devnum, ep->epnum,
1486 (ep->epnum == 0) ? ""
1487 : ((ep->nextpid == USB_PID_IN)
1488 ? "in"
1489 : "out"),
1490 ep->maxpacket, ep->error_count);
1491 ep = ep->next;
1492 } while (ep);
1493 }
1494
1495 spin_unlock_irq(&sl811->lock);
1496 seq_printf(s, "\n");
1497
1498 return 0;
1499 }
1500
1501 static int proc_sl811h_open(struct inode *inode, struct file *file)
1502 {
1503 return single_open(file, proc_sl811h_show, PDE(inode)->data);
1504 }
1505
1506 static struct file_operations proc_ops = {
1507 .open = proc_sl811h_open,
1508 .read = seq_read,
1509 .llseek = seq_lseek,
1510 .release = single_release,
1511 };
1512
1513 /* expect just one sl811 per system */
1514 static const char proc_filename[] = "driver/sl811h";
1515
1516 static void create_debug_file(struct sl811 *sl811)
1517 {
1518 struct proc_dir_entry *pde;
1519
1520 pde = create_proc_entry(proc_filename, 0, NULL);
1521 if (pde == NULL)
1522 return;
1523
1524 pde->proc_fops = &proc_ops;
1525 pde->data = sl811;
1526 sl811->pde = pde;
1527 }
1528
1529 static void remove_debug_file(struct sl811 *sl811)
1530 {
1531 if (sl811->pde)
1532 remove_proc_entry(proc_filename, NULL);
1533 }
1534
1535 #endif
1536
1537 /*-------------------------------------------------------------------------*/
1538
1539 static void
1540 sl811h_stop(struct usb_hcd *hcd)
1541 {
1542 struct sl811 *sl811 = hcd_to_sl811(hcd);
1543 unsigned long flags;
1544
1545 del_timer_sync(&hcd->rh_timer);
1546
1547 spin_lock_irqsave(&sl811->lock, flags);
1548 port_power(sl811, 0);
1549 spin_unlock_irqrestore(&sl811->lock, flags);
1550 }
1551
1552 static int
1553 sl811h_start(struct usb_hcd *hcd)
1554 {
1555 struct sl811 *sl811 = hcd_to_sl811(hcd);
1556 struct usb_device *udev;
1557
1558 /* chip has been reset, VBUS power is off */
1559
1560 udev = usb_alloc_dev(NULL, &hcd->self, 0);
1561 if (!udev)
1562 return -ENOMEM;
1563
1564 udev->speed = USB_SPEED_FULL;
1565 hcd->state = HC_STATE_RUNNING;
1566
1567 if (sl811->board)
1568 hcd->can_wakeup = sl811->board->can_wakeup;
1569
1570 if (usb_hcd_register_root_hub(udev, hcd) != 0) {
1571 usb_put_dev(udev);
1572 sl811h_stop(hcd);
1573 return -ENODEV;
1574 }
1575
1576 if (sl811->board && sl811->board->power)
1577 hub_set_power_budget(udev, sl811->board->power * 2);
1578
1579 return 0;
1580 }
1581
1582 /*-------------------------------------------------------------------------*/
1583
1584 static struct hc_driver sl811h_hc_driver = {
1585 .description = hcd_name,
1586 .hcd_priv_size = sizeof(struct sl811),
1587
1588 /*
1589 * generic hardware linkage
1590 */
1591 .irq = sl811h_irq,
1592 .flags = HCD_USB11 | HCD_MEMORY,
1593
1594 /* Basic lifecycle operations */
1595 .start = sl811h_start,
1596 .stop = sl811h_stop,
1597
1598 /*
1599 * managing i/o requests and associated device resources
1600 */
1601 .urb_enqueue = sl811h_urb_enqueue,
1602 .urb_dequeue = sl811h_urb_dequeue,
1603 .endpoint_disable = sl811h_endpoint_disable,
1604
1605 /*
1606 * periodic schedule support
1607 */
1608 .get_frame_number = sl811h_get_frame,
1609
1610 /*
1611 * root hub support
1612 */
1613 .hub_status_data = sl811h_hub_status_data,
1614 .hub_control = sl811h_hub_control,
1615 .hub_suspend = sl811h_hub_suspend,
1616 .hub_resume = sl811h_hub_resume,
1617 };
1618
1619 /*-------------------------------------------------------------------------*/
1620
1621 static int __init_or_module
1622 sl811h_remove(struct device *dev)
1623 {
1624 struct usb_hcd *hcd = dev_get_drvdata(dev);
1625 struct sl811 *sl811 = hcd_to_sl811(hcd);
1626 struct platform_device *pdev;
1627 struct resource *res;
1628
1629 pdev = container_of(dev, struct platform_device, dev);
1630
1631 remove_debug_file(sl811);
1632 usb_remove_hcd(hcd);
1633
1634 iounmap(sl811->data_reg);
1635 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1636 release_mem_region(res->start, 1);
1637
1638 iounmap(sl811->addr_reg);
1639 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1640 release_mem_region(res->start, 1);
1641
1642 usb_put_hcd(hcd);
1643 return 0;
1644 }
1645
1646 #define resource_len(r) (((r)->end - (r)->start) + 1)
1647
1648 static int __init
1649 sl811h_probe(struct device *dev)
1650 {
1651 struct usb_hcd *hcd;
1652 struct sl811 *sl811;
1653 struct platform_device *pdev;
1654 struct resource *addr, *data;
1655 int irq;
1656 void __iomem *addr_reg;
1657 void __iomem *data_reg;
1658 int retval;
1659 u8 tmp;
1660
1661 /* basic sanity checks first. board-specific init logic should
1662 * have initialized these three resources and probably board
1663 * specific platform_data. we don't probe for IRQs, and do only
1664 * minimal sanity checking.
1665 */
1666 pdev = container_of(dev, struct platform_device, dev);
1667 if (pdev->num_resources < 3)
1668 return -ENODEV;
1669
1670 addr = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1671 data = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1672 irq = platform_get_irq(pdev, 0);
1673 if (!addr || !data || irq < 0)
1674 return -ENODEV;
1675
1676 /* refuse to confuse usbcore */
1677 if (dev->dma_mask) {
1678 DBG("no we won't dma\n");
1679 return -EINVAL;
1680 }
1681
1682 if (!request_mem_region(addr->start, 1, hcd_name)) {
1683 retval = -EBUSY;
1684 goto err1;
1685 }
1686 addr_reg = ioremap(addr->start, resource_len(addr));
1687 if (addr_reg == NULL) {
1688 retval = -ENOMEM;
1689 goto err2;
1690 }
1691
1692 if (!request_mem_region(data->start, 1, hcd_name)) {
1693 retval = -EBUSY;
1694 goto err3;
1695 }
1696 data_reg = ioremap(data->start, resource_len(addr));
1697 if (data_reg == NULL) {
1698 retval = -ENOMEM;
1699 goto err4;
1700 }
1701
1702 /* allocate and initialize hcd */
1703 hcd = usb_create_hcd(&sl811h_hc_driver, dev, dev->bus_id);
1704 if (!hcd) {
1705 retval = -ENOMEM;
1706 goto err5;
1707 }
1708 hcd->rsrc_start = addr->start;
1709 sl811 = hcd_to_sl811(hcd);
1710
1711 spin_lock_init(&sl811->lock);
1712 INIT_LIST_HEAD(&sl811->async);
1713 sl811->board = dev->platform_data;
1714 init_timer(&sl811->timer);
1715 sl811->timer.function = sl811h_timer;
1716 sl811->timer.data = (unsigned long) sl811;
1717 sl811->addr_reg = addr_reg;
1718 sl811->data_reg = data_reg;
1719
1720 spin_lock_irq(&sl811->lock);
1721 port_power(sl811, 0);
1722 spin_unlock_irq(&sl811->lock);
1723 msleep(200);
1724
1725 tmp = sl811_read(sl811, SL11H_HWREVREG);
1726 switch (tmp >> 4) {
1727 case 1:
1728 hcd->product_desc = "SL811HS v1.2";
1729 break;
1730 case 2:
1731 hcd->product_desc = "SL811HS v1.5";
1732 break;
1733 default:
1734 /* reject case 0, SL11S is less functional */
1735 DBG("chiprev %02x\n", tmp);
1736 retval = -ENXIO;
1737 goto err6;
1738 }
1739
1740 /* sl811s would need a different handler for this irq */
1741 #ifdef CONFIG_ARM
1742 /* Cypress docs say the IRQ is IRQT_HIGH ... */
1743 set_irq_type(irq, IRQT_RISING);
1744 #endif
1745 retval = usb_add_hcd(hcd, irq, SA_INTERRUPT);
1746 if (retval != 0)
1747 goto err6;
1748
1749 create_debug_file(sl811);
1750 return retval;
1751
1752 err6:
1753 usb_put_hcd(hcd);
1754 err5:
1755 iounmap(data_reg);
1756 err4:
1757 release_mem_region(data->start, 1);
1758 err3:
1759 iounmap(addr_reg);
1760 err2:
1761 release_mem_region(addr->start, 1);
1762 err1:
1763 DBG("init error, %d\n", retval);
1764 return retval;
1765 }
1766
1767 #ifdef CONFIG_PM
1768
1769 /* for this device there's no useful distinction between the controller
1770 * and its root hub, except that the root hub only gets direct PM calls
1771 * when CONFIG_USB_SUSPEND is enabled.
1772 */
1773
1774 static int
1775 sl811h_suspend(struct device *dev, pm_message_t state, u32 phase)
1776 {
1777 struct usb_hcd *hcd = dev_get_drvdata(dev);
1778 struct sl811 *sl811 = hcd_to_sl811(hcd);
1779 int retval = 0;
1780
1781 if (phase != SUSPEND_POWER_DOWN)
1782 return retval;
1783
1784 if (state <= PM_SUSPEND_MEM)
1785 retval = sl811h_hub_suspend(hcd);
1786 else
1787 port_power(sl811, 0);
1788 if (retval == 0)
1789 dev->power.power_state = state;
1790 return retval;
1791 }
1792
1793 static int
1794 sl811h_resume(struct device *dev, u32 phase)
1795 {
1796 struct usb_hcd *hcd = dev_get_drvdata(dev);
1797 struct sl811 *sl811 = hcd_to_sl811(hcd);
1798
1799 if (phase != RESUME_POWER_ON)
1800 return 0;
1801
1802 /* with no "check to see if VBUS is still powered" board hook,
1803 * let's assume it'd only be powered to enable remote wakeup.
1804 */
1805 if (dev->power.power_state > PM_SUSPEND_MEM
1806 || !hcd->can_wakeup) {
1807 sl811->port1 = 0;
1808 port_power(sl811, 1);
1809 return 0;
1810 }
1811
1812 dev->power.power_state = PMSG_ON;
1813 return sl811h_hub_resume(hcd);
1814 }
1815
1816 #else
1817
1818 #define sl811h_suspend NULL
1819 #define sl811h_resume NULL
1820
1821 #endif
1822
1823
1824 static struct device_driver sl811h_driver = {
1825 .name = (char *) hcd_name,
1826 .bus = &platform_bus_type,
1827
1828 .probe = sl811h_probe,
1829 .remove = sl811h_remove,
1830
1831 .suspend = sl811h_suspend,
1832 .resume = sl811h_resume,
1833 };
1834
1835 /*-------------------------------------------------------------------------*/
1836
1837 static int __init sl811h_init(void)
1838 {
1839 if (usb_disabled())
1840 return -ENODEV;
1841
1842 INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1843 return driver_register(&sl811h_driver);
1844 }
1845 module_init(sl811h_init);
1846
1847 static void __exit sl811h_cleanup(void)
1848 {
1849 driver_unregister(&sl811h_driver);
1850 }
1851 module_exit(sl811h_cleanup);
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