Commit | Line | Data |
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1da177e4 LT |
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 | |
093cf723 | 137 | * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation. |
1da177e4 LT |
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 | ||
093cf723 | 741 | /* port status seems weird until after reset, so |
1da177e4 LT |
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); |