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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) | |
1e9a47b6 DB |
5 | * Copyright (C) 2004-2005 David Brownell |
6 | * | |
1da177e4 LT |
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. | |
1e9a47b6 | 18 | */ |
1da177e4 LT |
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 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/ioport.h> | |
39 | #include <linux/sched.h> | |
40 | #include <linux/slab.h> | |
1da177e4 LT |
41 | #include <linux/errno.h> |
42 | #include <linux/init.h> | |
43 | #include <linux/timer.h> | |
44 | #include <linux/list.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/usb.h> | |
325a4af6 | 47 | #include <linux/usb/sl811.h> |
27729aad | 48 | #include <linux/usb/hcd.h> |
d052d1be | 49 | #include <linux/platform_device.h> |
268bb0ce | 50 | #include <linux/prefetch.h> |
1da177e4 LT |
51 | |
52 | #include <asm/io.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/system.h> | |
55 | #include <asm/byteorder.h> | |
8ca5bfab | 56 | #include <asm/unaligned.h> |
1da177e4 | 57 | |
1da177e4 LT |
58 | #include "sl811.h" |
59 | ||
60 | ||
61 | MODULE_DESCRIPTION("SL811HS USB Host Controller Driver"); | |
62 | MODULE_LICENSE("GPL"); | |
f4fce61d | 63 | MODULE_ALIAS("platform:sl811-hcd"); |
1da177e4 | 64 | |
1e9a47b6 | 65 | #define DRIVER_VERSION "19 May 2005" |
1da177e4 LT |
66 | |
67 | ||
68 | #ifndef DEBUG | |
69 | # define STUB_DEBUG_FILE | |
70 | #endif | |
71 | ||
72 | /* for now, use only one transfer register bank */ | |
73 | #undef USE_B | |
74 | ||
75 | /* this doesn't understand urb->iso_frame_desc[], but if you had a driver | |
76 | * that just queued one ISO frame per URB then iso transfers "should" work | |
77 | * using the normal urb status fields. | |
78 | */ | |
79 | #define DISABLE_ISO | |
80 | ||
81 | // #define QUIRK2 | |
82 | #define QUIRK3 | |
83 | ||
84 | static const char hcd_name[] = "sl811-hcd"; | |
85 | ||
86 | /*-------------------------------------------------------------------------*/ | |
87 | ||
88 | static void port_power(struct sl811 *sl811, int is_on) | |
89 | { | |
90 | struct usb_hcd *hcd = sl811_to_hcd(sl811); | |
91 | ||
92 | /* hub is inactive unless the port is powered */ | |
93 | if (is_on) { | |
749da5f8 | 94 | if (sl811->port1 & USB_PORT_STAT_POWER) |
1da177e4 LT |
95 | return; |
96 | ||
749da5f8 | 97 | sl811->port1 = USB_PORT_STAT_POWER; |
1da177e4 | 98 | sl811->irq_enable = SL11H_INTMASK_INSRMV; |
1da177e4 LT |
99 | } else { |
100 | sl811->port1 = 0; | |
101 | sl811->irq_enable = 0; | |
102 | hcd->state = HC_STATE_HALT; | |
1da177e4 LT |
103 | } |
104 | sl811->ctrl1 = 0; | |
105 | sl811_write(sl811, SL11H_IRQ_ENABLE, 0); | |
106 | sl811_write(sl811, SL11H_IRQ_STATUS, ~0); | |
107 | ||
108 | if (sl811->board && sl811->board->port_power) { | |
109 | /* switch VBUS, at 500mA unless hub power budget gets set */ | |
110 | DBG("power %s\n", is_on ? "on" : "off"); | |
111 | sl811->board->port_power(hcd->self.controller, is_on); | |
112 | } | |
113 | ||
114 | /* reset as thoroughly as we can */ | |
115 | if (sl811->board && sl811->board->reset) | |
116 | sl811->board->reset(hcd->self.controller); | |
1e9a47b6 DB |
117 | else { |
118 | sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0); | |
119 | mdelay(20); | |
120 | } | |
1da177e4 LT |
121 | |
122 | sl811_write(sl811, SL11H_IRQ_ENABLE, 0); | |
123 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
124 | sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT); | |
125 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
126 | ||
127 | // if !is_on, put into lowpower mode now | |
128 | } | |
129 | ||
130 | /*-------------------------------------------------------------------------*/ | |
131 | ||
132 | /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue, | |
133 | * and may start I/O. Endpoint queues are scanned during completion irq | |
093cf723 | 134 | * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation. |
1da177e4 LT |
135 | * |
136 | * Using an external DMA engine to copy a packet at a time could work, | |
137 | * though setup/teardown costs may be too big to make it worthwhile. | |
138 | */ | |
139 | ||
140 | /* SETUP starts a new control request. Devices are not allowed to | |
141 | * STALL or NAK these; they must cancel any pending control requests. | |
142 | */ | |
143 | static void setup_packet( | |
144 | struct sl811 *sl811, | |
145 | struct sl811h_ep *ep, | |
146 | struct urb *urb, | |
147 | u8 bank, | |
148 | u8 control | |
149 | ) | |
150 | { | |
151 | u8 addr; | |
152 | u8 len; | |
153 | void __iomem *data_reg; | |
154 | ||
155 | addr = SL811HS_PACKET_BUF(bank == 0); | |
156 | len = sizeof(struct usb_ctrlrequest); | |
157 | data_reg = sl811->data_reg; | |
158 | sl811_write_buf(sl811, addr, urb->setup_packet, len); | |
159 | ||
160 | /* autoincrementing */ | |
161 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
162 | writeb(len, data_reg); | |
163 | writeb(SL_SETUP /* | ep->epnum */, data_reg); | |
164 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
165 | ||
166 | /* always OUT/data0 */ ; | |
167 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, | |
168 | control | SL11H_HCTLMASK_OUT); | |
169 | ep->length = 0; | |
170 | PACKET("SETUP qh%p\n", ep); | |
171 | } | |
172 | ||
173 | /* STATUS finishes control requests, often after IN or OUT data packets */ | |
174 | static void status_packet( | |
175 | struct sl811 *sl811, | |
176 | struct sl811h_ep *ep, | |
177 | struct urb *urb, | |
178 | u8 bank, | |
179 | u8 control | |
180 | ) | |
181 | { | |
182 | int do_out; | |
183 | void __iomem *data_reg; | |
184 | ||
185 | do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe); | |
186 | data_reg = sl811->data_reg; | |
187 | ||
188 | /* autoincrementing */ | |
189 | sl811_write(sl811, bank + SL11H_BUFADDRREG, 0); | |
190 | writeb(0, data_reg); | |
191 | writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg); | |
192 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
193 | ||
194 | /* always data1; sometimes IN */ | |
195 | control |= SL11H_HCTLMASK_TOGGLE; | |
196 | if (do_out) | |
197 | control |= SL11H_HCTLMASK_OUT; | |
198 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); | |
199 | ep->length = 0; | |
200 | PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "", | |
201 | do_out ? "out" : "in", ep); | |
202 | } | |
203 | ||
204 | /* IN packets can be used with any type of endpoint. here we just | |
205 | * start the transfer, data from the peripheral may arrive later. | |
206 | * urb->iso_frame_desc is currently ignored here... | |
207 | */ | |
208 | static void in_packet( | |
209 | struct sl811 *sl811, | |
210 | struct sl811h_ep *ep, | |
211 | struct urb *urb, | |
212 | u8 bank, | |
213 | u8 control | |
214 | ) | |
215 | { | |
216 | u8 addr; | |
217 | u8 len; | |
218 | void __iomem *data_reg; | |
219 | ||
220 | /* avoid losing data on overflow */ | |
221 | len = ep->maxpacket; | |
222 | addr = SL811HS_PACKET_BUF(bank == 0); | |
223 | if (!(control & SL11H_HCTLMASK_ISOCH) | |
224 | && usb_gettoggle(urb->dev, ep->epnum, 0)) | |
225 | control |= SL11H_HCTLMASK_TOGGLE; | |
226 | data_reg = sl811->data_reg; | |
227 | ||
228 | /* autoincrementing */ | |
229 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
230 | writeb(len, data_reg); | |
231 | writeb(SL_IN | ep->epnum, data_reg); | |
232 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
233 | ||
234 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); | |
16e2e5f6 | 235 | ep->length = min_t(u32, len, |
1da177e4 LT |
236 | urb->transfer_buffer_length - urb->actual_length); |
237 | PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", | |
238 | !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len); | |
239 | } | |
240 | ||
241 | /* OUT packets can be used with any type of endpoint. | |
242 | * urb->iso_frame_desc is currently ignored here... | |
243 | */ | |
244 | static void out_packet( | |
245 | struct sl811 *sl811, | |
246 | struct sl811h_ep *ep, | |
247 | struct urb *urb, | |
248 | u8 bank, | |
249 | u8 control | |
250 | ) | |
251 | { | |
252 | void *buf; | |
253 | u8 addr; | |
254 | u8 len; | |
255 | void __iomem *data_reg; | |
256 | ||
257 | buf = urb->transfer_buffer + urb->actual_length; | |
258 | prefetch(buf); | |
259 | ||
16e2e5f6 | 260 | len = min_t(u32, ep->maxpacket, |
1da177e4 LT |
261 | urb->transfer_buffer_length - urb->actual_length); |
262 | ||
263 | if (!(control & SL11H_HCTLMASK_ISOCH) | |
264 | && usb_gettoggle(urb->dev, ep->epnum, 1)) | |
265 | control |= SL11H_HCTLMASK_TOGGLE; | |
266 | addr = SL811HS_PACKET_BUF(bank == 0); | |
267 | data_reg = sl811->data_reg; | |
268 | ||
269 | sl811_write_buf(sl811, addr, buf, len); | |
270 | ||
271 | /* autoincrementing */ | |
272 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
273 | writeb(len, data_reg); | |
274 | writeb(SL_OUT | ep->epnum, data_reg); | |
275 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
276 | ||
277 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, | |
278 | control | SL11H_HCTLMASK_OUT); | |
279 | ep->length = len; | |
280 | PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", | |
281 | !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len); | |
282 | } | |
283 | ||
284 | /*-------------------------------------------------------------------------*/ | |
285 | ||
286 | /* caller updates on-chip enables later */ | |
287 | ||
288 | static inline void sofirq_on(struct sl811 *sl811) | |
289 | { | |
290 | if (sl811->irq_enable & SL11H_INTMASK_SOFINTR) | |
291 | return; | |
292 | VDBG("sof irq on\n"); | |
293 | sl811->irq_enable |= SL11H_INTMASK_SOFINTR; | |
294 | } | |
295 | ||
296 | static inline void sofirq_off(struct sl811 *sl811) | |
297 | { | |
298 | if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR)) | |
299 | return; | |
300 | VDBG("sof irq off\n"); | |
301 | sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR; | |
302 | } | |
303 | ||
304 | /*-------------------------------------------------------------------------*/ | |
305 | ||
306 | /* pick the next endpoint for a transaction, and issue it. | |
307 | * frames start with periodic transfers (after whatever is pending | |
308 | * from the previous frame), and the rest of the time is async | |
309 | * transfers, scheduled round-robin. | |
310 | */ | |
311 | static struct sl811h_ep *start(struct sl811 *sl811, u8 bank) | |
312 | { | |
313 | struct sl811h_ep *ep; | |
314 | struct urb *urb; | |
315 | int fclock; | |
316 | u8 control; | |
317 | ||
318 | /* use endpoint at schedule head */ | |
319 | if (sl811->next_periodic) { | |
320 | ep = sl811->next_periodic; | |
321 | sl811->next_periodic = ep->next; | |
322 | } else { | |
323 | if (sl811->next_async) | |
324 | ep = sl811->next_async; | |
325 | else if (!list_empty(&sl811->async)) | |
326 | ep = container_of(sl811->async.next, | |
327 | struct sl811h_ep, schedule); | |
328 | else { | |
329 | /* could set up the first fullspeed periodic | |
330 | * transfer for the next frame ... | |
331 | */ | |
332 | return NULL; | |
333 | } | |
334 | ||
335 | #ifdef USE_B | |
336 | if ((bank && sl811->active_b == ep) || sl811->active_a == ep) | |
337 | return NULL; | |
338 | #endif | |
339 | ||
340 | if (ep->schedule.next == &sl811->async) | |
341 | sl811->next_async = NULL; | |
342 | else | |
343 | sl811->next_async = container_of(ep->schedule.next, | |
344 | struct sl811h_ep, schedule); | |
345 | } | |
346 | ||
347 | if (unlikely(list_empty(&ep->hep->urb_list))) { | |
348 | DBG("empty %p queue?\n", ep); | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); | |
353 | control = ep->defctrl; | |
354 | ||
355 | /* if this frame doesn't have enough time left to transfer this | |
356 | * packet, wait till the next frame. too-simple algorithm... | |
357 | */ | |
358 | fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6; | |
359 | fclock -= 100; /* setup takes not much time */ | |
360 | if (urb->dev->speed == USB_SPEED_LOW) { | |
361 | if (control & SL11H_HCTLMASK_PREAMBLE) { | |
362 | /* also note erratum 1: some hubs won't work */ | |
363 | fclock -= 800; | |
364 | } | |
365 | fclock -= ep->maxpacket << 8; | |
366 | ||
367 | /* erratum 2: AFTERSOF only works for fullspeed */ | |
368 | if (fclock < 0) { | |
369 | if (ep->period) | |
370 | sl811->stat_overrun++; | |
371 | sofirq_on(sl811); | |
372 | return NULL; | |
373 | } | |
374 | } else { | |
375 | fclock -= 12000 / 19; /* 19 64byte packets/msec */ | |
376 | if (fclock < 0) { | |
377 | if (ep->period) | |
378 | sl811->stat_overrun++; | |
379 | control |= SL11H_HCTLMASK_AFTERSOF; | |
380 | ||
381 | /* throttle bulk/control irq noise */ | |
382 | } else if (ep->nak_count) | |
383 | control |= SL11H_HCTLMASK_AFTERSOF; | |
384 | } | |
385 | ||
386 | ||
387 | switch (ep->nextpid) { | |
388 | case USB_PID_IN: | |
389 | in_packet(sl811, ep, urb, bank, control); | |
390 | break; | |
391 | case USB_PID_OUT: | |
392 | out_packet(sl811, ep, urb, bank, control); | |
393 | break; | |
394 | case USB_PID_SETUP: | |
395 | setup_packet(sl811, ep, urb, bank, control); | |
396 | break; | |
397 | case USB_PID_ACK: /* for control status */ | |
398 | status_packet(sl811, ep, urb, bank, control); | |
399 | break; | |
400 | default: | |
401 | DBG("bad ep%p pid %02x\n", ep, ep->nextpid); | |
402 | ep = NULL; | |
403 | } | |
404 | return ep; | |
405 | } | |
406 | ||
407 | #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2) | |
408 | ||
409 | static inline void start_transfer(struct sl811 *sl811) | |
410 | { | |
749da5f8 | 411 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) |
1da177e4 LT |
412 | return; |
413 | if (sl811->active_a == NULL) { | |
414 | sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF)); | |
415 | if (sl811->active_a != NULL) | |
416 | sl811->jiffies_a = jiffies + MIN_JIFFIES; | |
417 | } | |
418 | #ifdef USE_B | |
419 | if (sl811->active_b == NULL) { | |
420 | sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF)); | |
421 | if (sl811->active_b != NULL) | |
422 | sl811->jiffies_b = jiffies + MIN_JIFFIES; | |
423 | } | |
424 | #endif | |
425 | } | |
426 | ||
427 | static void finish_request( | |
428 | struct sl811 *sl811, | |
429 | struct sl811h_ep *ep, | |
430 | struct urb *urb, | |
1da177e4 LT |
431 | int status |
432 | ) __releases(sl811->lock) __acquires(sl811->lock) | |
433 | { | |
434 | unsigned i; | |
435 | ||
436 | if (usb_pipecontrol(urb->pipe)) | |
437 | ep->nextpid = USB_PID_SETUP; | |
438 | ||
e9df41c5 | 439 | usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb); |
1da177e4 | 440 | spin_unlock(&sl811->lock); |
4a00027d | 441 | usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status); |
1da177e4 LT |
442 | spin_lock(&sl811->lock); |
443 | ||
444 | /* leave active endpoints in the schedule */ | |
445 | if (!list_empty(&ep->hep->urb_list)) | |
446 | return; | |
447 | ||
448 | /* async deschedule? */ | |
449 | if (!list_empty(&ep->schedule)) { | |
450 | list_del_init(&ep->schedule); | |
451 | if (ep == sl811->next_async) | |
452 | sl811->next_async = NULL; | |
453 | return; | |
454 | } | |
455 | ||
456 | /* periodic deschedule */ | |
457 | DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); | |
458 | for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { | |
459 | struct sl811h_ep *temp; | |
460 | struct sl811h_ep **prev = &sl811->periodic[i]; | |
461 | ||
462 | while (*prev && ((temp = *prev) != ep)) | |
463 | prev = &temp->next; | |
464 | if (*prev) | |
465 | *prev = ep->next; | |
466 | sl811->load[i] -= ep->load; | |
1e9a47b6 | 467 | } |
1da177e4 LT |
468 | ep->branch = PERIODIC_SIZE; |
469 | sl811->periodic_count--; | |
470 | sl811_to_hcd(sl811)->self.bandwidth_allocated | |
471 | -= ep->load / ep->period; | |
472 | if (ep == sl811->next_periodic) | |
473 | sl811->next_periodic = ep->next; | |
474 | ||
475 | /* we might turn SOFs back on again for the async schedule */ | |
476 | if (sl811->periodic_count == 0) | |
477 | sofirq_off(sl811); | |
478 | } | |
479 | ||
480 | static void | |
7d12e780 | 481 | done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank) |
1da177e4 LT |
482 | { |
483 | u8 status; | |
484 | struct urb *urb; | |
485 | int urbstat = -EINPROGRESS; | |
486 | ||
487 | if (unlikely(!ep)) | |
488 | return; | |
489 | ||
490 | status = sl811_read(sl811, bank + SL11H_PKTSTATREG); | |
491 | ||
492 | urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); | |
493 | ||
494 | /* we can safely ignore NAKs */ | |
495 | if (status & SL11H_STATMASK_NAK) { | |
496 | // PACKET("...NAK_%02x qh%p\n", bank, ep); | |
497 | if (!ep->period) | |
498 | ep->nak_count++; | |
499 | ep->error_count = 0; | |
500 | ||
501 | /* ACK advances transfer, toggle, and maybe queue */ | |
502 | } else if (status & SL11H_STATMASK_ACK) { | |
503 | struct usb_device *udev = urb->dev; | |
504 | int len; | |
505 | unsigned char *buf; | |
506 | ||
507 | /* urb->iso_frame_desc is currently ignored here... */ | |
508 | ||
509 | ep->nak_count = ep->error_count = 0; | |
510 | switch (ep->nextpid) { | |
511 | case USB_PID_OUT: | |
512 | // PACKET("...ACK/out_%02x qh%p\n", bank, ep); | |
513 | urb->actual_length += ep->length; | |
514 | usb_dotoggle(udev, ep->epnum, 1); | |
515 | if (urb->actual_length | |
516 | == urb->transfer_buffer_length) { | |
517 | if (usb_pipecontrol(urb->pipe)) | |
518 | ep->nextpid = USB_PID_ACK; | |
519 | ||
520 | /* some bulk protocols terminate OUT transfers | |
521 | * by a short packet, using ZLPs not padding. | |
522 | */ | |
523 | else if (ep->length < ep->maxpacket | |
524 | || !(urb->transfer_flags | |
525 | & URB_ZERO_PACKET)) | |
526 | urbstat = 0; | |
527 | } | |
528 | break; | |
529 | case USB_PID_IN: | |
530 | // PACKET("...ACK/in_%02x qh%p\n", bank, ep); | |
531 | buf = urb->transfer_buffer + urb->actual_length; | |
532 | prefetchw(buf); | |
533 | len = ep->maxpacket - sl811_read(sl811, | |
534 | bank + SL11H_XFERCNTREG); | |
535 | if (len > ep->length) { | |
536 | len = ep->length; | |
65e51098 | 537 | urbstat = -EOVERFLOW; |
1da177e4 LT |
538 | } |
539 | urb->actual_length += len; | |
540 | sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0), | |
541 | buf, len); | |
542 | usb_dotoggle(udev, ep->epnum, 0); | |
65e51098 AS |
543 | if (urbstat == -EINPROGRESS && |
544 | (len < ep->maxpacket || | |
545 | urb->actual_length == | |
546 | urb->transfer_buffer_length)) { | |
547 | if (usb_pipecontrol(urb->pipe)) | |
548 | ep->nextpid = USB_PID_ACK; | |
549 | else | |
550 | urbstat = 0; | |
1da177e4 LT |
551 | } |
552 | break; | |
553 | case USB_PID_SETUP: | |
554 | // PACKET("...ACK/setup_%02x qh%p\n", bank, ep); | |
555 | if (urb->transfer_buffer_length == urb->actual_length) | |
556 | ep->nextpid = USB_PID_ACK; | |
557 | else if (usb_pipeout(urb->pipe)) { | |
558 | usb_settoggle(udev, 0, 1, 1); | |
559 | ep->nextpid = USB_PID_OUT; | |
560 | } else { | |
561 | usb_settoggle(udev, 0, 0, 1); | |
562 | ep->nextpid = USB_PID_IN; | |
563 | } | |
564 | break; | |
565 | case USB_PID_ACK: | |
566 | // PACKET("...ACK/status_%02x qh%p\n", bank, ep); | |
567 | urbstat = 0; | |
568 | break; | |
569 | } | |
570 | ||
571 | /* STALL stops all transfers */ | |
572 | } else if (status & SL11H_STATMASK_STALL) { | |
573 | PACKET("...STALL_%02x qh%p\n", bank, ep); | |
574 | ep->nak_count = ep->error_count = 0; | |
575 | urbstat = -EPIPE; | |
576 | ||
577 | /* error? retry, until "3 strikes" */ | |
578 | } else if (++ep->error_count >= 3) { | |
579 | if (status & SL11H_STATMASK_TMOUT) | |
38e2bfc9 | 580 | urbstat = -ETIME; |
1da177e4 LT |
581 | else if (status & SL11H_STATMASK_OVF) |
582 | urbstat = -EOVERFLOW; | |
583 | else | |
584 | urbstat = -EPROTO; | |
585 | ep->error_count = 0; | |
586 | PACKET("...3STRIKES_%02x %02x qh%p stat %d\n", | |
587 | bank, status, ep, urbstat); | |
588 | } | |
589 | ||
65e51098 | 590 | if (urbstat != -EINPROGRESS || urb->unlinked) |
7d12e780 | 591 | finish_request(sl811, ep, urb, urbstat); |
1da177e4 LT |
592 | } |
593 | ||
594 | static inline u8 checkdone(struct sl811 *sl811) | |
595 | { | |
596 | u8 ctl; | |
597 | u8 irqstat = 0; | |
598 | ||
599 | if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) { | |
600 | ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)); | |
601 | if (ctl & SL11H_HCTLMASK_ARM) | |
602 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); | |
603 | DBG("%s DONE_A: ctrl %02x sts %02x\n", | |
604 | (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", | |
605 | ctl, | |
606 | sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); | |
607 | irqstat |= SL11H_INTMASK_DONE_A; | |
608 | } | |
609 | #ifdef USE_B | |
610 | if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) { | |
611 | ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)); | |
612 | if (ctl & SL11H_HCTLMASK_ARM) | |
613 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); | |
614 | DBG("%s DONE_B: ctrl %02x sts %02x\n", | |
615 | (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", | |
616 | ctl, | |
617 | sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); | |
618 | irqstat |= SL11H_INTMASK_DONE_A; | |
619 | } | |
620 | #endif | |
621 | return irqstat; | |
622 | } | |
623 | ||
7d12e780 | 624 | static irqreturn_t sl811h_irq(struct usb_hcd *hcd) |
1da177e4 LT |
625 | { |
626 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
627 | u8 irqstat; | |
628 | irqreturn_t ret = IRQ_NONE; | |
629 | unsigned retries = 5; | |
630 | ||
631 | spin_lock(&sl811->lock); | |
632 | ||
633 | retry: | |
634 | irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP; | |
635 | if (irqstat) { | |
636 | sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); | |
637 | irqstat &= sl811->irq_enable; | |
638 | } | |
639 | ||
640 | #ifdef QUIRK2 | |
641 | /* this may no longer be necessary ... */ | |
1e9a47b6 | 642 | if (irqstat == 0) { |
1da177e4 | 643 | irqstat = checkdone(sl811); |
1e9a47b6 | 644 | if (irqstat) |
1da177e4 LT |
645 | sl811->stat_lost++; |
646 | } | |
647 | #endif | |
648 | ||
649 | /* USB packets, not necessarily handled in the order they're | |
650 | * issued ... that's fine if they're different endpoints. | |
651 | */ | |
652 | if (irqstat & SL11H_INTMASK_DONE_A) { | |
7d12e780 | 653 | done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF)); |
1da177e4 LT |
654 | sl811->active_a = NULL; |
655 | sl811->stat_a++; | |
656 | } | |
657 | #ifdef USE_B | |
658 | if (irqstat & SL11H_INTMASK_DONE_B) { | |
7d12e780 | 659 | done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF)); |
1da177e4 LT |
660 | sl811->active_b = NULL; |
661 | sl811->stat_b++; | |
662 | } | |
663 | #endif | |
664 | if (irqstat & SL11H_INTMASK_SOFINTR) { | |
665 | unsigned index; | |
666 | ||
667 | index = sl811->frame++ % (PERIODIC_SIZE - 1); | |
668 | sl811->stat_sof++; | |
669 | ||
670 | /* be graceful about almost-inevitable periodic schedule | |
671 | * overruns: continue the previous frame's transfers iff | |
672 | * this one has nothing scheduled. | |
673 | */ | |
674 | if (sl811->next_periodic) { | |
675 | // ERR("overrun to slot %d\n", index); | |
676 | sl811->stat_overrun++; | |
677 | } | |
678 | if (sl811->periodic[index]) | |
679 | sl811->next_periodic = sl811->periodic[index]; | |
680 | } | |
681 | ||
682 | /* khubd manages debouncing and wakeup */ | |
683 | if (irqstat & SL11H_INTMASK_INSRMV) { | |
684 | sl811->stat_insrmv++; | |
685 | ||
686 | /* most stats are reset for each VBUS session */ | |
687 | sl811->stat_wake = 0; | |
688 | sl811->stat_sof = 0; | |
689 | sl811->stat_a = 0; | |
690 | sl811->stat_b = 0; | |
691 | sl811->stat_lost = 0; | |
692 | ||
693 | sl811->ctrl1 = 0; | |
694 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
695 | ||
696 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
697 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
698 | ||
699 | /* usbcore nukes other pending transactions on disconnect */ | |
700 | if (sl811->active_a) { | |
701 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); | |
702 | finish_request(sl811, sl811->active_a, | |
1e9a47b6 DB |
703 | container_of(sl811->active_a |
704 | ->hep->urb_list.next, | |
1da177e4 | 705 | struct urb, urb_list), |
7d12e780 | 706 | -ESHUTDOWN); |
1da177e4 LT |
707 | sl811->active_a = NULL; |
708 | } | |
709 | #ifdef USE_B | |
710 | if (sl811->active_b) { | |
711 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); | |
712 | finish_request(sl811, sl811->active_b, | |
1e9a47b6 DB |
713 | container_of(sl811->active_b |
714 | ->hep->urb_list.next, | |
1da177e4 LT |
715 | struct urb, urb_list), |
716 | NULL, -ESHUTDOWN); | |
717 | sl811->active_b = NULL; | |
718 | } | |
719 | #endif | |
720 | ||
093cf723 | 721 | /* port status seems weird until after reset, so |
1da177e4 LT |
722 | * force the reset and make khubd clean up later. |
723 | */ | |
8a3461e2 | 724 | if (irqstat & SL11H_INTMASK_RD) |
749da5f8 | 725 | sl811->port1 &= ~USB_PORT_STAT_CONNECTION; |
8a3461e2 | 726 | else |
749da5f8 | 727 | sl811->port1 |= USB_PORT_STAT_CONNECTION; |
eb661bc8 | 728 | |
749da5f8 | 729 | sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 LT |
730 | |
731 | } else if (irqstat & SL11H_INTMASK_RD) { | |
749da5f8 | 732 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 733 | DBG("wakeup\n"); |
749da5f8 | 734 | sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 LT |
735 | sl811->stat_wake++; |
736 | } else | |
737 | irqstat &= ~SL11H_INTMASK_RD; | |
738 | } | |
739 | ||
740 | if (irqstat) { | |
749da5f8 | 741 | if (sl811->port1 & USB_PORT_STAT_ENABLE) |
1da177e4 LT |
742 | start_transfer(sl811); |
743 | ret = IRQ_HANDLED; | |
744 | if (retries--) | |
745 | goto retry; | |
746 | } | |
747 | ||
1e9a47b6 | 748 | if (sl811->periodic_count == 0 && list_empty(&sl811->async)) |
1da177e4 LT |
749 | sofirq_off(sl811); |
750 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
751 | ||
752 | spin_unlock(&sl811->lock); | |
753 | ||
754 | return ret; | |
755 | } | |
756 | ||
757 | /*-------------------------------------------------------------------------*/ | |
758 | ||
759 | /* usb 1.1 says max 90% of a frame is available for periodic transfers. | |
760 | * this driver doesn't promise that much since it's got to handle an | |
761 | * IRQ per packet; irq handling latencies also use up that time. | |
4b2e790a DB |
762 | * |
763 | * NOTE: the periodic schedule is a sparse tree, with the load for | |
764 | * each branch minimized. see fig 3.5 in the OHCI spec for example. | |
1da177e4 LT |
765 | */ |
766 | #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */ | |
767 | ||
768 | static int balance(struct sl811 *sl811, u16 period, u16 load) | |
769 | { | |
770 | int i, branch = -ENOSPC; | |
771 | ||
772 | /* search for the least loaded schedule branch of that period | |
773 | * which has enough bandwidth left unreserved. | |
774 | */ | |
775 | for (i = 0; i < period ; i++) { | |
776 | if (branch < 0 || sl811->load[branch] > sl811->load[i]) { | |
777 | int j; | |
778 | ||
779 | for (j = i; j < PERIODIC_SIZE; j += period) { | |
780 | if ((sl811->load[j] + load) | |
781 | > MAX_PERIODIC_LOAD) | |
782 | break; | |
783 | } | |
784 | if (j < PERIODIC_SIZE) | |
785 | continue; | |
1e9a47b6 | 786 | branch = i; |
1da177e4 LT |
787 | } |
788 | } | |
789 | return branch; | |
790 | } | |
791 | ||
792 | /*-------------------------------------------------------------------------*/ | |
793 | ||
794 | static int sl811h_urb_enqueue( | |
795 | struct usb_hcd *hcd, | |
1da177e4 | 796 | struct urb *urb, |
55016f10 | 797 | gfp_t mem_flags |
1da177e4 LT |
798 | ) { |
799 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
800 | struct usb_device *udev = urb->dev; | |
801 | unsigned int pipe = urb->pipe; | |
802 | int is_out = !usb_pipein(pipe); | |
803 | int type = usb_pipetype(pipe); | |
804 | int epnum = usb_pipeendpoint(pipe); | |
805 | struct sl811h_ep *ep = NULL; | |
806 | unsigned long flags; | |
807 | int i; | |
e9df41c5 AS |
808 | int retval; |
809 | struct usb_host_endpoint *hep = urb->ep; | |
1da177e4 LT |
810 | |
811 | #ifdef DISABLE_ISO | |
812 | if (type == PIPE_ISOCHRONOUS) | |
813 | return -ENOSPC; | |
814 | #endif | |
815 | ||
816 | /* avoid all allocations within spinlocks */ | |
76be932a | 817 | if (!hep->hcpriv) { |
7b842b6e | 818 | ep = kzalloc(sizeof *ep, mem_flags); |
76be932a KV |
819 | if (ep == NULL) |
820 | return -ENOMEM; | |
821 | } | |
1da177e4 LT |
822 | |
823 | spin_lock_irqsave(&sl811->lock, flags); | |
824 | ||
825 | /* don't submit to a dead or disabled port */ | |
749da5f8 | 826 | if (!(sl811->port1 & USB_PORT_STAT_ENABLE) |
1da177e4 LT |
827 | || !HC_IS_RUNNING(hcd->state)) { |
828 | retval = -ENODEV; | |
4b2e790a | 829 | kfree(ep); |
e9df41c5 AS |
830 | goto fail_not_linked; |
831 | } | |
832 | retval = usb_hcd_link_urb_to_ep(hcd, urb); | |
833 | if (retval) { | |
834 | kfree(ep); | |
835 | goto fail_not_linked; | |
1da177e4 LT |
836 | } |
837 | ||
838 | if (hep->hcpriv) { | |
839 | kfree(ep); | |
840 | ep = hep->hcpriv; | |
841 | } else if (!ep) { | |
842 | retval = -ENOMEM; | |
843 | goto fail; | |
844 | ||
845 | } else { | |
846 | INIT_LIST_HEAD(&ep->schedule); | |
6a8e87b2 | 847 | ep->udev = udev; |
1da177e4 LT |
848 | ep->epnum = epnum; |
849 | ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out); | |
850 | ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE; | |
851 | usb_settoggle(udev, epnum, is_out, 0); | |
852 | ||
853 | if (type == PIPE_CONTROL) | |
854 | ep->nextpid = USB_PID_SETUP; | |
855 | else if (is_out) | |
856 | ep->nextpid = USB_PID_OUT; | |
857 | else | |
858 | ep->nextpid = USB_PID_IN; | |
859 | ||
860 | if (ep->maxpacket > H_MAXPACKET) { | |
861 | /* iso packets up to 240 bytes could work... */ | |
862 | DBG("dev %d ep%d maxpacket %d\n", | |
863 | udev->devnum, epnum, ep->maxpacket); | |
864 | retval = -EINVAL; | |
2bd15f1f | 865 | kfree(ep); |
1da177e4 LT |
866 | goto fail; |
867 | } | |
868 | ||
869 | if (udev->speed == USB_SPEED_LOW) { | |
870 | /* send preamble for external hub? */ | |
871 | if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD)) | |
872 | ep->defctrl |= SL11H_HCTLMASK_PREAMBLE; | |
873 | } | |
874 | switch (type) { | |
875 | case PIPE_ISOCHRONOUS: | |
876 | case PIPE_INTERRUPT: | |
877 | if (urb->interval > PERIODIC_SIZE) | |
878 | urb->interval = PERIODIC_SIZE; | |
879 | ep->period = urb->interval; | |
880 | ep->branch = PERIODIC_SIZE; | |
881 | if (type == PIPE_ISOCHRONOUS) | |
882 | ep->defctrl |= SL11H_HCTLMASK_ISOCH; | |
883 | ep->load = usb_calc_bus_time(udev->speed, !is_out, | |
884 | (type == PIPE_ISOCHRONOUS), | |
885 | usb_maxpacket(udev, pipe, is_out)) | |
886 | / 1000; | |
887 | break; | |
888 | } | |
889 | ||
1e9a47b6 | 890 | ep->hep = hep; |
1da177e4 LT |
891 | hep->hcpriv = ep; |
892 | } | |
893 | ||
894 | /* maybe put endpoint into schedule */ | |
895 | switch (type) { | |
896 | case PIPE_CONTROL: | |
897 | case PIPE_BULK: | |
898 | if (list_empty(&ep->schedule)) | |
899 | list_add_tail(&ep->schedule, &sl811->async); | |
900 | break; | |
901 | case PIPE_ISOCHRONOUS: | |
902 | case PIPE_INTERRUPT: | |
903 | urb->interval = ep->period; | |
4b2e790a DB |
904 | if (ep->branch < PERIODIC_SIZE) { |
905 | /* NOTE: the phase is correct here, but the value | |
906 | * needs offsetting by the transfer queue depth. | |
907 | * All current drivers ignore start_frame, so this | |
908 | * is unlikely to ever matter... | |
909 | */ | |
910 | urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) | |
911 | + ep->branch; | |
1da177e4 | 912 | break; |
4b2e790a | 913 | } |
1da177e4 LT |
914 | |
915 | retval = balance(sl811, ep->period, ep->load); | |
916 | if (retval < 0) | |
917 | goto fail; | |
918 | ep->branch = retval; | |
919 | retval = 0; | |
920 | urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) | |
921 | + ep->branch; | |
922 | ||
923 | /* sort each schedule branch by period (slow before fast) | |
924 | * to share the faster parts of the tree without needing | |
925 | * dummy/placeholder nodes | |
926 | */ | |
927 | DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); | |
928 | for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { | |
929 | struct sl811h_ep **prev = &sl811->periodic[i]; | |
930 | struct sl811h_ep *here = *prev; | |
931 | ||
932 | while (here && ep != here) { | |
933 | if (ep->period > here->period) | |
934 | break; | |
935 | prev = &here->next; | |
936 | here = *prev; | |
937 | } | |
938 | if (ep != here) { | |
939 | ep->next = here; | |
940 | *prev = ep; | |
941 | } | |
942 | sl811->load[i] += ep->load; | |
943 | } | |
944 | sl811->periodic_count++; | |
945 | hcd->self.bandwidth_allocated += ep->load / ep->period; | |
946 | sofirq_on(sl811); | |
947 | } | |
948 | ||
1da177e4 | 949 | urb->hcpriv = hep; |
1da177e4 LT |
950 | start_transfer(sl811); |
951 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
952 | fail: | |
e9df41c5 AS |
953 | if (retval) |
954 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
955 | fail_not_linked: | |
1da177e4 LT |
956 | spin_unlock_irqrestore(&sl811->lock, flags); |
957 | return retval; | |
958 | } | |
959 | ||
e9df41c5 | 960 | static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
961 | { |
962 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1e9a47b6 | 963 | struct usb_host_endpoint *hep; |
1da177e4 LT |
964 | unsigned long flags; |
965 | struct sl811h_ep *ep; | |
e9df41c5 | 966 | int retval; |
1da177e4 | 967 | |
1e9a47b6 | 968 | spin_lock_irqsave(&sl811->lock, flags); |
e9df41c5 AS |
969 | retval = usb_hcd_check_unlink_urb(hcd, urb, status); |
970 | if (retval) | |
1e9a47b6 | 971 | goto fail; |
1da177e4 | 972 | |
e9df41c5 | 973 | hep = urb->hcpriv; |
1da177e4 LT |
974 | ep = hep->hcpriv; |
975 | if (ep) { | |
976 | /* finish right away if this urb can't be active ... | |
977 | * note that some drivers wrongly expect delays | |
978 | */ | |
979 | if (ep->hep->urb_list.next != &urb->urb_list) { | |
980 | /* not front of queue? never active */ | |
981 | ||
982 | /* for active transfers, we expect an IRQ */ | |
983 | } else if (sl811->active_a == ep) { | |
984 | if (time_before_eq(sl811->jiffies_a, jiffies)) { | |
985 | /* happens a lot with lowspeed?? */ | |
986 | DBG("giveup on DONE_A: ctrl %02x sts %02x\n", | |
987 | sl811_read(sl811, | |
988 | SL811_EP_A(SL11H_HOSTCTLREG)), | |
989 | sl811_read(sl811, | |
990 | SL811_EP_A(SL11H_PKTSTATREG))); | |
991 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), | |
992 | 0); | |
993 | sl811->active_a = NULL; | |
994 | } else | |
995 | urb = NULL; | |
996 | #ifdef USE_B | |
997 | } else if (sl811->active_b == ep) { | |
998 | if (time_before_eq(sl811->jiffies_a, jiffies)) { | |
999 | /* happens a lot with lowspeed?? */ | |
1000 | DBG("giveup on DONE_B: ctrl %02x sts %02x\n", | |
1001 | sl811_read(sl811, | |
1002 | SL811_EP_B(SL11H_HOSTCTLREG)), | |
1003 | sl811_read(sl811, | |
1004 | SL811_EP_B(SL11H_PKTSTATREG))); | |
1005 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), | |
1006 | 0); | |
1007 | sl811->active_b = NULL; | |
1008 | } else | |
1009 | urb = NULL; | |
1010 | #endif | |
1011 | } else { | |
1012 | /* front of queue for inactive endpoint */ | |
1013 | } | |
1014 | ||
1015 | if (urb) | |
7d12e780 | 1016 | finish_request(sl811, ep, urb, 0); |
1da177e4 LT |
1017 | else |
1018 | VDBG("dequeue, urb %p active %s; wait4irq\n", urb, | |
1019 | (sl811->active_a == ep) ? "A" : "B"); | |
1020 | } else | |
1021 | retval = -EINVAL; | |
e9df41c5 | 1022 | fail: |
1da177e4 LT |
1023 | spin_unlock_irqrestore(&sl811->lock, flags); |
1024 | return retval; | |
1025 | } | |
1026 | ||
1027 | static void | |
1028 | sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep) | |
1029 | { | |
1030 | struct sl811h_ep *ep = hep->hcpriv; | |
1031 | ||
1032 | if (!ep) | |
1033 | return; | |
1034 | ||
1035 | /* assume we'd just wait for the irq */ | |
1036 | if (!list_empty(&hep->urb_list)) | |
1037 | msleep(3); | |
1038 | if (!list_empty(&hep->urb_list)) | |
b6c63937 | 1039 | WARNING("ep %p not empty?\n", ep); |
1da177e4 | 1040 | |
1da177e4 LT |
1041 | kfree(ep); |
1042 | hep->hcpriv = NULL; | |
1043 | } | |
1044 | ||
1045 | static int | |
1046 | sl811h_get_frame(struct usb_hcd *hcd) | |
1047 | { | |
1048 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1049 | ||
1050 | /* wrong except while periodic transfers are scheduled; | |
1051 | * never matches the on-the-wire frame; | |
1052 | * subject to overruns. | |
1053 | */ | |
1054 | return sl811->frame; | |
1055 | } | |
1056 | ||
1057 | ||
1058 | /*-------------------------------------------------------------------------*/ | |
1059 | ||
1060 | /* the virtual root hub timer IRQ checks for hub status */ | |
1061 | static int | |
1062 | sl811h_hub_status_data(struct usb_hcd *hcd, char *buf) | |
1063 | { | |
1064 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1065 | #ifdef QUIRK3 | |
1066 | unsigned long flags; | |
1067 | ||
1068 | /* non-SMP HACK: use root hub timer as i/o watchdog | |
1069 | * this seems essential when SOF IRQs aren't in use... | |
1070 | */ | |
1071 | local_irq_save(flags); | |
1072 | if (!timer_pending(&sl811->timer)) { | |
7d12e780 | 1073 | if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE) |
1da177e4 LT |
1074 | sl811->stat_lost++; |
1075 | } | |
1076 | local_irq_restore(flags); | |
1077 | #endif | |
1078 | ||
1079 | if (!(sl811->port1 & (0xffff << 16))) | |
1080 | return 0; | |
1081 | ||
1082 | /* tell khubd port 1 changed */ | |
1083 | *buf = (1 << 1); | |
1084 | return 1; | |
1085 | } | |
1086 | ||
1087 | static void | |
1088 | sl811h_hub_descriptor ( | |
1089 | struct sl811 *sl811, | |
1090 | struct usb_hub_descriptor *desc | |
1091 | ) { | |
1092 | u16 temp = 0; | |
1093 | ||
1094 | desc->bDescriptorType = 0x29; | |
1095 | desc->bHubContrCurrent = 0; | |
1096 | ||
1097 | desc->bNbrPorts = 1; | |
1098 | desc->bDescLength = 9; | |
1099 | ||
1100 | /* per-port power switching (gang of one!), or none */ | |
1101 | desc->bPwrOn2PwrGood = 0; | |
1102 | if (sl811->board && sl811->board->port_power) { | |
1103 | desc->bPwrOn2PwrGood = sl811->board->potpg; | |
1104 | if (!desc->bPwrOn2PwrGood) | |
1105 | desc->bPwrOn2PwrGood = 10; | |
1106 | temp = 0x0001; | |
1107 | } else | |
1108 | temp = 0x0002; | |
1109 | ||
1110 | /* no overcurrent errors detection/handling */ | |
1111 | temp |= 0x0010; | |
1112 | ||
fd05e720 | 1113 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 | 1114 | |
da13051c | 1115 | /* ports removable, and legacy PortPwrCtrlMask */ |
dbe79bbe JY |
1116 | desc->u.hs.DeviceRemovable[0] = 0 << 1; |
1117 | desc->u.hs.DeviceRemovable[1] = ~0; | |
1da177e4 LT |
1118 | } |
1119 | ||
1120 | static void | |
1121 | sl811h_timer(unsigned long _sl811) | |
1122 | { | |
1123 | struct sl811 *sl811 = (void *) _sl811; | |
1124 | unsigned long flags; | |
1125 | u8 irqstat; | |
1126 | u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE; | |
749da5f8 AS |
1127 | const u32 mask = USB_PORT_STAT_CONNECTION |
1128 | | USB_PORT_STAT_ENABLE | |
288ead45 | 1129 | | USB_PORT_STAT_LOW_SPEED; |
1da177e4 LT |
1130 | |
1131 | spin_lock_irqsave(&sl811->lock, flags); | |
1132 | ||
1133 | /* stop special signaling */ | |
1134 | sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE; | |
1135 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1136 | udelay(3); | |
1137 | ||
1138 | irqstat = sl811_read(sl811, SL11H_IRQ_STATUS); | |
1139 | ||
1140 | switch (signaling) { | |
1141 | case SL11H_CTL1MASK_SE0: | |
1142 | DBG("end reset\n"); | |
749da5f8 AS |
1143 | sl811->port1 = (USB_PORT_STAT_C_RESET << 16) |
1144 | | USB_PORT_STAT_POWER; | |
1da177e4 LT |
1145 | sl811->ctrl1 = 0; |
1146 | /* don't wrongly ack RD */ | |
1147 | if (irqstat & SL11H_INTMASK_INSRMV) | |
1148 | irqstat &= ~SL11H_INTMASK_RD; | |
1149 | break; | |
1150 | case SL11H_CTL1MASK_K: | |
1151 | DBG("end resume\n"); | |
749da5f8 | 1152 | sl811->port1 &= ~USB_PORT_STAT_SUSPEND; |
1da177e4 LT |
1153 | break; |
1154 | default: | |
1155 | DBG("odd timer signaling: %02x\n", signaling); | |
1156 | break; | |
1157 | } | |
1158 | sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); | |
1159 | ||
1160 | if (irqstat & SL11H_INTMASK_RD) { | |
1161 | /* usbcore nukes all pending transactions on disconnect */ | |
749da5f8 AS |
1162 | if (sl811->port1 & USB_PORT_STAT_CONNECTION) |
1163 | sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16) | |
1164 | | (USB_PORT_STAT_C_ENABLE << 16); | |
1da177e4 LT |
1165 | sl811->port1 &= ~mask; |
1166 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
1167 | } else { | |
1168 | sl811->port1 |= mask; | |
1169 | if (irqstat & SL11H_INTMASK_DP) | |
288ead45 | 1170 | sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED; |
1da177e4 LT |
1171 | sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD; |
1172 | } | |
1173 | ||
749da5f8 | 1174 | if (sl811->port1 & USB_PORT_STAT_CONNECTION) { |
1da177e4 LT |
1175 | u8 ctrl2 = SL811HS_CTL2_INIT; |
1176 | ||
1177 | sl811->irq_enable |= SL11H_INTMASK_DONE_A; | |
1178 | #ifdef USE_B | |
1179 | sl811->irq_enable |= SL11H_INTMASK_DONE_B; | |
1180 | #endif | |
288ead45 | 1181 | if (sl811->port1 & USB_PORT_STAT_LOW_SPEED) { |
1da177e4 LT |
1182 | sl811->ctrl1 |= SL11H_CTL1MASK_LSPD; |
1183 | ctrl2 |= SL811HS_CTL2MASK_DSWAP; | |
1184 | } | |
1185 | ||
1186 | /* start SOFs flowing, kickstarting with A registers */ | |
1187 | sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA; | |
1188 | sl811_write(sl811, SL11H_SOFLOWREG, 0xe0); | |
1189 | sl811_write(sl811, SL811HS_CTLREG2, ctrl2); | |
1190 | ||
1191 | /* autoincrementing */ | |
1192 | sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0); | |
1193 | writeb(SL_SOF, sl811->data_reg); | |
1194 | writeb(0, sl811->data_reg); | |
1195 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), | |
1196 | SL11H_HCTLMASK_ARM); | |
1197 | ||
1198 | /* khubd provides debounce delay */ | |
1199 | } else { | |
1200 | sl811->ctrl1 = 0; | |
1201 | } | |
1202 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1203 | ||
1204 | /* reenable irqs */ | |
1205 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
1206 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1207 | } | |
1208 | ||
1209 | static int | |
1210 | sl811h_hub_control( | |
1211 | struct usb_hcd *hcd, | |
1212 | u16 typeReq, | |
1213 | u16 wValue, | |
1214 | u16 wIndex, | |
1215 | char *buf, | |
1216 | u16 wLength | |
1217 | ) { | |
1218 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1219 | int retval = 0; | |
1220 | unsigned long flags; | |
1221 | ||
1222 | spin_lock_irqsave(&sl811->lock, flags); | |
1223 | ||
1224 | switch (typeReq) { | |
1225 | case ClearHubFeature: | |
1226 | case SetHubFeature: | |
1227 | switch (wValue) { | |
1228 | case C_HUB_OVER_CURRENT: | |
1229 | case C_HUB_LOCAL_POWER: | |
1230 | break; | |
1231 | default: | |
1232 | goto error; | |
1233 | } | |
1234 | break; | |
1235 | case ClearPortFeature: | |
1236 | if (wIndex != 1 || wLength != 0) | |
1237 | goto error; | |
1238 | ||
1239 | switch (wValue) { | |
1240 | case USB_PORT_FEAT_ENABLE: | |
749da5f8 | 1241 | sl811->port1 &= USB_PORT_STAT_POWER; |
1da177e4 LT |
1242 | sl811->ctrl1 = 0; |
1243 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1244 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
1245 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1246 | sl811->irq_enable); | |
1247 | break; | |
1248 | case USB_PORT_FEAT_SUSPEND: | |
749da5f8 | 1249 | if (!(sl811->port1 & USB_PORT_STAT_SUSPEND)) |
1da177e4 LT |
1250 | break; |
1251 | ||
1252 | /* 20 msec of resume/K signaling, other irqs blocked */ | |
1253 | DBG("start resume...\n"); | |
1254 | sl811->irq_enable = 0; | |
1255 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1256 | sl811->irq_enable); | |
1257 | sl811->ctrl1 |= SL11H_CTL1MASK_K; | |
1258 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1259 | ||
1260 | mod_timer(&sl811->timer, jiffies | |
1261 | + msecs_to_jiffies(20)); | |
1262 | break; | |
1263 | case USB_PORT_FEAT_POWER: | |
1264 | port_power(sl811, 0); | |
1265 | break; | |
1266 | case USB_PORT_FEAT_C_ENABLE: | |
1267 | case USB_PORT_FEAT_C_SUSPEND: | |
1268 | case USB_PORT_FEAT_C_CONNECTION: | |
1269 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
1270 | case USB_PORT_FEAT_C_RESET: | |
1271 | break; | |
1272 | default: | |
1273 | goto error; | |
1274 | } | |
1275 | sl811->port1 &= ~(1 << wValue); | |
1276 | break; | |
1277 | case GetHubDescriptor: | |
1278 | sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf); | |
1279 | break; | |
1280 | case GetHubStatus: | |
8ca5bfab | 1281 | put_unaligned_le32(0, buf); |
1da177e4 LT |
1282 | break; |
1283 | case GetPortStatus: | |
1284 | if (wIndex != 1) | |
1285 | goto error; | |
8ca5bfab | 1286 | put_unaligned_le32(sl811->port1, buf); |
1da177e4 LT |
1287 | |
1288 | #ifndef VERBOSE | |
1289 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ | |
1290 | #endif | |
1291 | DBG("GetPortStatus %08x\n", sl811->port1); | |
1292 | break; | |
1293 | case SetPortFeature: | |
1294 | if (wIndex != 1 || wLength != 0) | |
1295 | goto error; | |
1296 | switch (wValue) { | |
1297 | case USB_PORT_FEAT_SUSPEND: | |
749da5f8 | 1298 | if (sl811->port1 & USB_PORT_STAT_RESET) |
1da177e4 | 1299 | goto error; |
749da5f8 | 1300 | if (!(sl811->port1 & USB_PORT_STAT_ENABLE)) |
1da177e4 LT |
1301 | goto error; |
1302 | ||
1303 | DBG("suspend...\n"); | |
1304 | sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA; | |
1305 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1306 | break; | |
1307 | case USB_PORT_FEAT_POWER: | |
1308 | port_power(sl811, 1); | |
1309 | break; | |
1310 | case USB_PORT_FEAT_RESET: | |
749da5f8 | 1311 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) |
1da177e4 | 1312 | goto error; |
749da5f8 | 1313 | if (!(sl811->port1 & USB_PORT_STAT_POWER)) |
1da177e4 LT |
1314 | break; |
1315 | ||
1316 | /* 50 msec of reset/SE0 signaling, irqs blocked */ | |
1317 | sl811->irq_enable = 0; | |
1318 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1319 | sl811->irq_enable); | |
1320 | sl811->ctrl1 = SL11H_CTL1MASK_SE0; | |
1321 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
749da5f8 | 1322 | sl811->port1 |= USB_PORT_STAT_RESET; |
1da177e4 LT |
1323 | mod_timer(&sl811->timer, jiffies |
1324 | + msecs_to_jiffies(50)); | |
1325 | break; | |
1326 | default: | |
1327 | goto error; | |
1328 | } | |
1329 | sl811->port1 |= 1 << wValue; | |
1330 | break; | |
1331 | ||
1332 | default: | |
1333 | error: | |
1334 | /* "protocol stall" on error */ | |
1335 | retval = -EPIPE; | |
1336 | } | |
1337 | ||
1338 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1339 | return retval; | |
1340 | } | |
1341 | ||
1342 | #ifdef CONFIG_PM | |
1343 | ||
1344 | static int | |
0c0382e3 | 1345 | sl811h_bus_suspend(struct usb_hcd *hcd) |
1da177e4 LT |
1346 | { |
1347 | // SOFs off | |
441b62c1 | 1348 | DBG("%s\n", __func__); |
1da177e4 LT |
1349 | return 0; |
1350 | } | |
1351 | ||
1352 | static int | |
0c0382e3 | 1353 | sl811h_bus_resume(struct usb_hcd *hcd) |
1da177e4 LT |
1354 | { |
1355 | // SOFs on | |
441b62c1 | 1356 | DBG("%s\n", __func__); |
1da177e4 LT |
1357 | return 0; |
1358 | } | |
1359 | ||
1360 | #else | |
1361 | ||
0c0382e3 AS |
1362 | #define sl811h_bus_suspend NULL |
1363 | #define sl811h_bus_resume NULL | |
1da177e4 LT |
1364 | |
1365 | #endif | |
1366 | ||
1367 | ||
1368 | /*-------------------------------------------------------------------------*/ | |
1369 | ||
1370 | #ifdef STUB_DEBUG_FILE | |
1371 | ||
1372 | static inline void create_debug_file(struct sl811 *sl811) { } | |
1373 | static inline void remove_debug_file(struct sl811 *sl811) { } | |
1374 | ||
1375 | #else | |
1376 | ||
1377 | #include <linux/proc_fs.h> | |
1378 | #include <linux/seq_file.h> | |
1379 | ||
1380 | static void dump_irq(struct seq_file *s, char *label, u8 mask) | |
1381 | { | |
1382 | seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask, | |
1383 | (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "", | |
1384 | (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "", | |
1385 | (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "", | |
1386 | (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "", | |
1387 | (mask & SL11H_INTMASK_RD) ? " rd" : "", | |
1388 | (mask & SL11H_INTMASK_DP) ? " dp" : ""); | |
1389 | } | |
1390 | ||
1391 | static int proc_sl811h_show(struct seq_file *s, void *unused) | |
1392 | { | |
1393 | struct sl811 *sl811 = s->private; | |
1394 | struct sl811h_ep *ep; | |
1395 | unsigned i; | |
1396 | ||
1397 | seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n", | |
1398 | sl811_to_hcd(sl811)->product_desc, | |
1399 | hcd_name, DRIVER_VERSION, | |
1400 | sl811->port1); | |
1401 | ||
1402 | seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv); | |
1403 | seq_printf(s, "current session: done_a %ld done_b %ld " | |
1404 | "wake %ld sof %ld overrun %ld lost %ld\n\n", | |
1405 | sl811->stat_a, sl811->stat_b, | |
1406 | sl811->stat_wake, sl811->stat_sof, | |
1407 | sl811->stat_overrun, sl811->stat_lost); | |
1408 | ||
1409 | spin_lock_irq(&sl811->lock); | |
1410 | ||
1411 | if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND) | |
1412 | seq_printf(s, "(suspended)\n\n"); | |
1413 | else { | |
1414 | u8 t = sl811_read(sl811, SL11H_CTLREG1); | |
1415 | ||
1416 | seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t, | |
1417 | (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "", | |
1418 | ({char *s; switch (t & SL11H_CTL1MASK_FORCE) { | |
1419 | case SL11H_CTL1MASK_NORMAL: s = ""; break; | |
1420 | case SL11H_CTL1MASK_SE0: s = " se0/reset"; break; | |
1421 | case SL11H_CTL1MASK_K: s = " k/resume"; break; | |
1422 | default: s = "j"; break; | |
1423 | }; s; }), | |
1424 | (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "", | |
1425 | (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : ""); | |
1426 | ||
1427 | dump_irq(s, "irq_enable", | |
1428 | sl811_read(sl811, SL11H_IRQ_ENABLE)); | |
1429 | dump_irq(s, "irq_status", | |
1430 | sl811_read(sl811, SL11H_IRQ_STATUS)); | |
1431 | seq_printf(s, "frame clocks remaining: %d\n", | |
1432 | sl811_read(sl811, SL11H_SOFTMRREG) << 6); | |
1433 | } | |
1434 | ||
1435 | seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a, | |
1436 | sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)), | |
1437 | sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); | |
1438 | seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b, | |
1439 | sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)), | |
1440 | sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); | |
1441 | seq_printf(s, "\n"); | |
1442 | list_for_each_entry (ep, &sl811->async, schedule) { | |
1443 | struct urb *urb; | |
1444 | ||
1445 | seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d" | |
1446 | " nak %d err %d\n", | |
1447 | (ep == sl811->active_a) ? "(A) " : "", | |
1448 | (ep == sl811->active_b) ? "(B) " : "", | |
1449 | ep, ep->epnum, | |
1450 | ({ char *s; switch (ep->nextpid) { | |
1451 | case USB_PID_IN: s = "in"; break; | |
1452 | case USB_PID_OUT: s = "out"; break; | |
1453 | case USB_PID_SETUP: s = "setup"; break; | |
1454 | case USB_PID_ACK: s = "status"; break; | |
1455 | default: s = "?"; break; | |
1456 | }; s;}), | |
1457 | ep->maxpacket, | |
1458 | ep->nak_count, ep->error_count); | |
1459 | list_for_each_entry (urb, &ep->hep->urb_list, urb_list) { | |
1460 | seq_printf(s, " urb%p, %d/%d\n", urb, | |
1461 | urb->actual_length, | |
1462 | urb->transfer_buffer_length); | |
1463 | } | |
1464 | } | |
1465 | if (!list_empty(&sl811->async)) | |
1466 | seq_printf(s, "\n"); | |
1467 | ||
1468 | seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE); | |
1469 | ||
1470 | for (i = 0; i < PERIODIC_SIZE; i++) { | |
1471 | ep = sl811->periodic[i]; | |
1472 | if (!ep) | |
1473 | continue; | |
1474 | seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]); | |
1475 | ||
1476 | /* DUMB: prints shared entries multiple times */ | |
1477 | do { | |
1478 | seq_printf(s, | |
1479 | " %s%sqh%d/%p (%sdev%d ep%d%s max %d) " | |
1480 | "err %d\n", | |
1481 | (ep == sl811->active_a) ? "(A) " : "", | |
1482 | (ep == sl811->active_b) ? "(B) " : "", | |
1483 | ep->period, ep, | |
1484 | (ep->udev->speed == USB_SPEED_FULL) | |
1485 | ? "" : "ls ", | |
1486 | ep->udev->devnum, ep->epnum, | |
1487 | (ep->epnum == 0) ? "" | |
1488 | : ((ep->nextpid == USB_PID_IN) | |
1489 | ? "in" | |
1490 | : "out"), | |
1491 | ep->maxpacket, ep->error_count); | |
1492 | ep = ep->next; | |
1493 | } while (ep); | |
1494 | } | |
1495 | ||
1496 | spin_unlock_irq(&sl811->lock); | |
1497 | seq_printf(s, "\n"); | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
1502 | static int proc_sl811h_open(struct inode *inode, struct file *file) | |
1503 | { | |
1504 | return single_open(file, proc_sl811h_show, PDE(inode)->data); | |
1505 | } | |
1506 | ||
066202dd | 1507 | static const struct file_operations proc_ops = { |
1da177e4 LT |
1508 | .open = proc_sl811h_open, |
1509 | .read = seq_read, | |
1510 | .llseek = seq_lseek, | |
1511 | .release = single_release, | |
1512 | }; | |
1513 | ||
1514 | /* expect just one sl811 per system */ | |
1515 | static const char proc_filename[] = "driver/sl811h"; | |
1516 | ||
1517 | static void create_debug_file(struct sl811 *sl811) | |
1518 | { | |
cdefa185 | 1519 | sl811->pde = proc_create_data(proc_filename, 0, NULL, &proc_ops, sl811); |
1da177e4 LT |
1520 | } |
1521 | ||
1522 | static void remove_debug_file(struct sl811 *sl811) | |
1523 | { | |
1524 | if (sl811->pde) | |
1525 | remove_proc_entry(proc_filename, NULL); | |
1526 | } | |
1527 | ||
1528 | #endif | |
1529 | ||
1530 | /*-------------------------------------------------------------------------*/ | |
1531 | ||
1532 | static void | |
1533 | sl811h_stop(struct usb_hcd *hcd) | |
1534 | { | |
1535 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1536 | unsigned long flags; | |
1537 | ||
1538 | del_timer_sync(&hcd->rh_timer); | |
1539 | ||
1540 | spin_lock_irqsave(&sl811->lock, flags); | |
1541 | port_power(sl811, 0); | |
1542 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1543 | } | |
1544 | ||
1545 | static int | |
1546 | sl811h_start(struct usb_hcd *hcd) | |
1547 | { | |
1548 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1da177e4 LT |
1549 | |
1550 | /* chip has been reset, VBUS power is off */ | |
1da177e4 LT |
1551 | hcd->state = HC_STATE_RUNNING; |
1552 | ||
bc96c0ad | 1553 | if (sl811->board) { |
0c8624f9 DB |
1554 | if (!device_can_wakeup(hcd->self.controller)) |
1555 | device_init_wakeup(hcd->self.controller, | |
1556 | sl811->board->can_wakeup); | |
bc96c0ad AS |
1557 | hcd->power_budget = sl811->board->power * 2; |
1558 | } | |
1da177e4 | 1559 | |
3a4fa0a2 | 1560 | /* enable power and interrupts */ |
1e9a47b6 DB |
1561 | port_power(sl811, 1); |
1562 | ||
1da177e4 LT |
1563 | return 0; |
1564 | } | |
1565 | ||
1566 | /*-------------------------------------------------------------------------*/ | |
1567 | ||
1568 | static struct hc_driver sl811h_hc_driver = { | |
1569 | .description = hcd_name, | |
1570 | .hcd_priv_size = sizeof(struct sl811), | |
1571 | ||
1572 | /* | |
1573 | * generic hardware linkage | |
1574 | */ | |
1575 | .irq = sl811h_irq, | |
1576 | .flags = HCD_USB11 | HCD_MEMORY, | |
1577 | ||
1578 | /* Basic lifecycle operations */ | |
1579 | .start = sl811h_start, | |
1580 | .stop = sl811h_stop, | |
1581 | ||
1582 | /* | |
1583 | * managing i/o requests and associated device resources | |
1584 | */ | |
1585 | .urb_enqueue = sl811h_urb_enqueue, | |
1586 | .urb_dequeue = sl811h_urb_dequeue, | |
1587 | .endpoint_disable = sl811h_endpoint_disable, | |
1588 | ||
1589 | /* | |
1590 | * periodic schedule support | |
1591 | */ | |
1592 | .get_frame_number = sl811h_get_frame, | |
1593 | ||
1594 | /* | |
1595 | * root hub support | |
1596 | */ | |
1597 | .hub_status_data = sl811h_hub_status_data, | |
1598 | .hub_control = sl811h_hub_control, | |
0c0382e3 AS |
1599 | .bus_suspend = sl811h_bus_suspend, |
1600 | .bus_resume = sl811h_bus_resume, | |
1da177e4 LT |
1601 | }; |
1602 | ||
1603 | /*-------------------------------------------------------------------------*/ | |
1604 | ||
1e9a47b6 | 1605 | static int __devexit |
3ae5eaec | 1606 | sl811h_remove(struct platform_device *dev) |
1da177e4 | 1607 | { |
3ae5eaec | 1608 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 | 1609 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1da177e4 LT |
1610 | struct resource *res; |
1611 | ||
1da177e4 LT |
1612 | remove_debug_file(sl811); |
1613 | usb_remove_hcd(hcd); | |
1614 | ||
1e9a47b6 | 1615 | /* some platforms may use IORESOURCE_IO */ |
3ae5eaec | 1616 | res = platform_get_resource(dev, IORESOURCE_MEM, 1); |
1e9a47b6 DB |
1617 | if (res) |
1618 | iounmap(sl811->data_reg); | |
1da177e4 | 1619 | |
3ae5eaec | 1620 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1e9a47b6 DB |
1621 | if (res) |
1622 | iounmap(sl811->addr_reg); | |
1da177e4 LT |
1623 | |
1624 | usb_put_hcd(hcd); | |
1625 | return 0; | |
1626 | } | |
1627 | ||
1e9a47b6 | 1628 | static int __devinit |
3ae5eaec | 1629 | sl811h_probe(struct platform_device *dev) |
1da177e4 LT |
1630 | { |
1631 | struct usb_hcd *hcd; | |
1632 | struct sl811 *sl811; | |
27140219 | 1633 | struct resource *addr, *data, *ires; |
1da177e4 LT |
1634 | int irq; |
1635 | void __iomem *addr_reg; | |
1636 | void __iomem *data_reg; | |
1637 | int retval; | |
1e9a47b6 | 1638 | u8 tmp, ioaddr = 0; |
27140219 | 1639 | unsigned long irqflags; |
1da177e4 LT |
1640 | |
1641 | /* basic sanity checks first. board-specific init logic should | |
1642 | * have initialized these three resources and probably board | |
1643 | * specific platform_data. we don't probe for IRQs, and do only | |
1644 | * minimal sanity checking. | |
1645 | */ | |
27140219 MZ |
1646 | ires = platform_get_resource(dev, IORESOURCE_IRQ, 0); |
1647 | if (dev->num_resources < 3 || !ires) | |
1da177e4 LT |
1648 | return -ENODEV; |
1649 | ||
27140219 MZ |
1650 | irq = ires->start; |
1651 | irqflags = ires->flags & IRQF_TRIGGER_MASK; | |
1652 | ||
1da177e4 | 1653 | /* refuse to confuse usbcore */ |
3ae5eaec | 1654 | if (dev->dev.dma_mask) { |
1da177e4 LT |
1655 | DBG("no we won't dma\n"); |
1656 | return -EINVAL; | |
1657 | } | |
1658 | ||
1e9a47b6 | 1659 | /* the chip may be wired for either kind of addressing */ |
3ae5eaec RK |
1660 | addr = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1661 | data = platform_get_resource(dev, IORESOURCE_MEM, 1); | |
1e9a47b6 DB |
1662 | retval = -EBUSY; |
1663 | if (!addr || !data) { | |
3ae5eaec RK |
1664 | addr = platform_get_resource(dev, IORESOURCE_IO, 0); |
1665 | data = platform_get_resource(dev, IORESOURCE_IO, 1); | |
1e9a47b6 DB |
1666 | if (!addr || !data) |
1667 | return -ENODEV; | |
1668 | ioaddr = 1; | |
2427ddd8 GKH |
1669 | /* |
1670 | * NOTE: 64-bit resource->start is getting truncated | |
1671 | * to avoid compiler warning, assuming that ->start | |
1672 | * is always 32-bit for this case | |
1673 | */ | |
1674 | addr_reg = (void __iomem *) (unsigned long) addr->start; | |
1675 | data_reg = (void __iomem *) (unsigned long) data->start; | |
1e9a47b6 DB |
1676 | } else { |
1677 | addr_reg = ioremap(addr->start, 1); | |
1678 | if (addr_reg == NULL) { | |
1679 | retval = -ENOMEM; | |
1680 | goto err2; | |
1681 | } | |
1da177e4 | 1682 | |
1e9a47b6 DB |
1683 | data_reg = ioremap(data->start, 1); |
1684 | if (data_reg == NULL) { | |
1685 | retval = -ENOMEM; | |
1686 | goto err4; | |
1687 | } | |
1da177e4 LT |
1688 | } |
1689 | ||
1690 | /* allocate and initialize hcd */ | |
7071a3ce | 1691 | hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev)); |
1da177e4 LT |
1692 | if (!hcd) { |
1693 | retval = -ENOMEM; | |
1694 | goto err5; | |
1695 | } | |
1696 | hcd->rsrc_start = addr->start; | |
1697 | sl811 = hcd_to_sl811(hcd); | |
1698 | ||
1699 | spin_lock_init(&sl811->lock); | |
1700 | INIT_LIST_HEAD(&sl811->async); | |
3ae5eaec | 1701 | sl811->board = dev->dev.platform_data; |
1da177e4 LT |
1702 | init_timer(&sl811->timer); |
1703 | sl811->timer.function = sl811h_timer; | |
1704 | sl811->timer.data = (unsigned long) sl811; | |
1705 | sl811->addr_reg = addr_reg; | |
1706 | sl811->data_reg = data_reg; | |
1707 | ||
1708 | spin_lock_irq(&sl811->lock); | |
1709 | port_power(sl811, 0); | |
1710 | spin_unlock_irq(&sl811->lock); | |
1711 | msleep(200); | |
1712 | ||
1713 | tmp = sl811_read(sl811, SL11H_HWREVREG); | |
1714 | switch (tmp >> 4) { | |
1715 | case 1: | |
1716 | hcd->product_desc = "SL811HS v1.2"; | |
1717 | break; | |
1718 | case 2: | |
1719 | hcd->product_desc = "SL811HS v1.5"; | |
1720 | break; | |
1721 | default: | |
1722 | /* reject case 0, SL11S is less functional */ | |
1723 | DBG("chiprev %02x\n", tmp); | |
1724 | retval = -ENXIO; | |
1725 | goto err6; | |
1726 | } | |
1727 | ||
1e9a47b6 DB |
1728 | /* The chip's IRQ is level triggered, active high. A requirement |
1729 | * for platform device setup is to cope with things like signal | |
1730 | * inverters (e.g. CF is active low) or working only with edge | |
1731 | * triggers (e.g. most ARM CPUs). Initial driver stress testing | |
1732 | * was on a system with single edge triggering, so most sorts of | |
1733 | * triggering arrangement should work. | |
27140219 MZ |
1734 | * |
1735 | * Use resource IRQ flags if set by platform device setup. | |
1e9a47b6 | 1736 | */ |
27140219 MZ |
1737 | irqflags |= IRQF_SHARED; |
1738 | retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | irqflags); | |
1da177e4 LT |
1739 | if (retval != 0) |
1740 | goto err6; | |
1741 | ||
1742 | create_debug_file(sl811); | |
1743 | return retval; | |
1744 | ||
1745 | err6: | |
1746 | usb_put_hcd(hcd); | |
1747 | err5: | |
1e9a47b6 DB |
1748 | if (!ioaddr) |
1749 | iounmap(data_reg); | |
1da177e4 | 1750 | err4: |
1e9a47b6 DB |
1751 | if (!ioaddr) |
1752 | iounmap(addr_reg); | |
1da177e4 | 1753 | err2: |
1da177e4 LT |
1754 | DBG("init error, %d\n", retval); |
1755 | return retval; | |
1756 | } | |
1757 | ||
1758 | #ifdef CONFIG_PM | |
1759 | ||
1760 | /* for this device there's no useful distinction between the controller | |
1e9a47b6 | 1761 | * and its root hub, except that the root hub only gets direct PM calls |
1da177e4 LT |
1762 | * when CONFIG_USB_SUSPEND is enabled. |
1763 | */ | |
1764 | ||
1765 | static int | |
3ae5eaec | 1766 | sl811h_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 1767 | { |
3ae5eaec | 1768 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
1769 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1770 | int retval = 0; | |
1771 | ||
18584999 DB |
1772 | switch (state.event) { |
1773 | case PM_EVENT_FREEZE: | |
0c0382e3 | 1774 | retval = sl811h_bus_suspend(hcd); |
18584999 DB |
1775 | break; |
1776 | case PM_EVENT_SUSPEND: | |
3a2d5b70 | 1777 | case PM_EVENT_HIBERNATE: |
18584999 | 1778 | case PM_EVENT_PRETHAW: /* explicitly discard hw state */ |
1da177e4 | 1779 | port_power(sl811, 0); |
18584999 DB |
1780 | break; |
1781 | } | |
1da177e4 LT |
1782 | return retval; |
1783 | } | |
1784 | ||
1785 | static int | |
3ae5eaec | 1786 | sl811h_resume(struct platform_device *dev) |
1da177e4 | 1787 | { |
3ae5eaec | 1788 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
1789 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1790 | ||
1da177e4 LT |
1791 | /* with no "check to see if VBUS is still powered" board hook, |
1792 | * let's assume it'd only be powered to enable remote wakeup. | |
1793 | */ | |
70a1c9e0 | 1794 | if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) { |
1da177e4 LT |
1795 | sl811->port1 = 0; |
1796 | port_power(sl811, 1); | |
1c50c317 | 1797 | usb_root_hub_lost_power(hcd->self.root_hub); |
1da177e4 LT |
1798 | return 0; |
1799 | } | |
1800 | ||
0c0382e3 | 1801 | return sl811h_bus_resume(hcd); |
1da177e4 LT |
1802 | } |
1803 | ||
1804 | #else | |
1805 | ||
1806 | #define sl811h_suspend NULL | |
1807 | #define sl811h_resume NULL | |
1808 | ||
1809 | #endif | |
1810 | ||
1811 | ||
1e9a47b6 | 1812 | /* this driver is exported so sl811_cs can depend on it */ |
3ae5eaec | 1813 | struct platform_driver sl811h_driver = { |
1da177e4 | 1814 | .probe = sl811h_probe, |
1e9a47b6 | 1815 | .remove = __devexit_p(sl811h_remove), |
1da177e4 LT |
1816 | |
1817 | .suspend = sl811h_suspend, | |
1818 | .resume = sl811h_resume, | |
3ae5eaec RK |
1819 | .driver = { |
1820 | .name = (char *) hcd_name, | |
1821 | .owner = THIS_MODULE, | |
1822 | }, | |
1da177e4 | 1823 | }; |
1e9a47b6 | 1824 | EXPORT_SYMBOL(sl811h_driver); |
1da177e4 LT |
1825 | |
1826 | /*-------------------------------------------------------------------------*/ | |
1e9a47b6 DB |
1827 | |
1828 | static int __init sl811h_init(void) | |
1da177e4 LT |
1829 | { |
1830 | if (usb_disabled()) | |
1831 | return -ENODEV; | |
1832 | ||
1833 | INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION); | |
3ae5eaec | 1834 | return platform_driver_register(&sl811h_driver); |
1da177e4 LT |
1835 | } |
1836 | module_init(sl811h_init); | |
1837 | ||
1e9a47b6 DB |
1838 | static void __exit sl811h_cleanup(void) |
1839 | { | |
3ae5eaec | 1840 | platform_driver_unregister(&sl811h_driver); |
1da177e4 LT |
1841 | } |
1842 | module_exit(sl811h_cleanup); |