Commit | Line | Data |
---|---|---|
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> | |
1da177e4 | 54 | #include <asm/byteorder.h> |
8ca5bfab | 55 | #include <asm/unaligned.h> |
1da177e4 | 56 | |
1da177e4 LT |
57 | #include "sl811.h" |
58 | ||
59 | ||
60 | MODULE_DESCRIPTION("SL811HS USB Host Controller Driver"); | |
61 | MODULE_LICENSE("GPL"); | |
f4fce61d | 62 | MODULE_ALIAS("platform:sl811-hcd"); |
1da177e4 | 63 | |
1e9a47b6 | 64 | #define DRIVER_VERSION "19 May 2005" |
1da177e4 LT |
65 | |
66 | ||
67 | #ifndef DEBUG | |
68 | # define STUB_DEBUG_FILE | |
69 | #endif | |
70 | ||
71 | /* for now, use only one transfer register bank */ | |
72 | #undef USE_B | |
73 | ||
1da177e4 LT |
74 | // #define QUIRK2 |
75 | #define QUIRK3 | |
76 | ||
77 | static const char hcd_name[] = "sl811-hcd"; | |
78 | ||
79 | /*-------------------------------------------------------------------------*/ | |
80 | ||
81 | static void port_power(struct sl811 *sl811, int is_on) | |
82 | { | |
83 | struct usb_hcd *hcd = sl811_to_hcd(sl811); | |
84 | ||
85 | /* hub is inactive unless the port is powered */ | |
86 | if (is_on) { | |
749da5f8 | 87 | if (sl811->port1 & USB_PORT_STAT_POWER) |
1da177e4 LT |
88 | return; |
89 | ||
749da5f8 | 90 | sl811->port1 = USB_PORT_STAT_POWER; |
1da177e4 | 91 | sl811->irq_enable = SL11H_INTMASK_INSRMV; |
1da177e4 LT |
92 | } else { |
93 | sl811->port1 = 0; | |
94 | sl811->irq_enable = 0; | |
95 | hcd->state = HC_STATE_HALT; | |
1da177e4 LT |
96 | } |
97 | sl811->ctrl1 = 0; | |
98 | sl811_write(sl811, SL11H_IRQ_ENABLE, 0); | |
99 | sl811_write(sl811, SL11H_IRQ_STATUS, ~0); | |
100 | ||
101 | if (sl811->board && sl811->board->port_power) { | |
102 | /* switch VBUS, at 500mA unless hub power budget gets set */ | |
103 | DBG("power %s\n", is_on ? "on" : "off"); | |
104 | sl811->board->port_power(hcd->self.controller, is_on); | |
105 | } | |
106 | ||
107 | /* reset as thoroughly as we can */ | |
108 | if (sl811->board && sl811->board->reset) | |
109 | sl811->board->reset(hcd->self.controller); | |
1e9a47b6 DB |
110 | else { |
111 | sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0); | |
112 | mdelay(20); | |
113 | } | |
1da177e4 LT |
114 | |
115 | sl811_write(sl811, SL11H_IRQ_ENABLE, 0); | |
116 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
117 | sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT); | |
118 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
119 | ||
120 | // if !is_on, put into lowpower mode now | |
121 | } | |
122 | ||
123 | /*-------------------------------------------------------------------------*/ | |
124 | ||
125 | /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue, | |
126 | * and may start I/O. Endpoint queues are scanned during completion irq | |
093cf723 | 127 | * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation. |
1da177e4 LT |
128 | * |
129 | * Using an external DMA engine to copy a packet at a time could work, | |
130 | * though setup/teardown costs may be too big to make it worthwhile. | |
131 | */ | |
132 | ||
133 | /* SETUP starts a new control request. Devices are not allowed to | |
134 | * STALL or NAK these; they must cancel any pending control requests. | |
135 | */ | |
136 | static void setup_packet( | |
137 | struct sl811 *sl811, | |
138 | struct sl811h_ep *ep, | |
139 | struct urb *urb, | |
140 | u8 bank, | |
141 | u8 control | |
142 | ) | |
143 | { | |
144 | u8 addr; | |
145 | u8 len; | |
146 | void __iomem *data_reg; | |
147 | ||
148 | addr = SL811HS_PACKET_BUF(bank == 0); | |
149 | len = sizeof(struct usb_ctrlrequest); | |
150 | data_reg = sl811->data_reg; | |
151 | sl811_write_buf(sl811, addr, urb->setup_packet, len); | |
152 | ||
153 | /* autoincrementing */ | |
154 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
155 | writeb(len, data_reg); | |
156 | writeb(SL_SETUP /* | ep->epnum */, data_reg); | |
157 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
158 | ||
159 | /* always OUT/data0 */ ; | |
160 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, | |
161 | control | SL11H_HCTLMASK_OUT); | |
162 | ep->length = 0; | |
163 | PACKET("SETUP qh%p\n", ep); | |
164 | } | |
165 | ||
166 | /* STATUS finishes control requests, often after IN or OUT data packets */ | |
167 | static void status_packet( | |
168 | struct sl811 *sl811, | |
169 | struct sl811h_ep *ep, | |
170 | struct urb *urb, | |
171 | u8 bank, | |
172 | u8 control | |
173 | ) | |
174 | { | |
175 | int do_out; | |
176 | void __iomem *data_reg; | |
177 | ||
178 | do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe); | |
179 | data_reg = sl811->data_reg; | |
180 | ||
181 | /* autoincrementing */ | |
182 | sl811_write(sl811, bank + SL11H_BUFADDRREG, 0); | |
183 | writeb(0, data_reg); | |
184 | writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg); | |
185 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
186 | ||
187 | /* always data1; sometimes IN */ | |
188 | control |= SL11H_HCTLMASK_TOGGLE; | |
189 | if (do_out) | |
190 | control |= SL11H_HCTLMASK_OUT; | |
191 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); | |
192 | ep->length = 0; | |
193 | PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "", | |
194 | do_out ? "out" : "in", ep); | |
195 | } | |
196 | ||
197 | /* IN packets can be used with any type of endpoint. here we just | |
198 | * start the transfer, data from the peripheral may arrive later. | |
199 | * urb->iso_frame_desc is currently ignored here... | |
200 | */ | |
201 | static void in_packet( | |
202 | struct sl811 *sl811, | |
203 | struct sl811h_ep *ep, | |
204 | struct urb *urb, | |
205 | u8 bank, | |
206 | u8 control | |
207 | ) | |
208 | { | |
209 | u8 addr; | |
210 | u8 len; | |
211 | void __iomem *data_reg; | |
212 | ||
213 | /* avoid losing data on overflow */ | |
214 | len = ep->maxpacket; | |
215 | addr = SL811HS_PACKET_BUF(bank == 0); | |
216 | if (!(control & SL11H_HCTLMASK_ISOCH) | |
217 | && usb_gettoggle(urb->dev, ep->epnum, 0)) | |
218 | control |= SL11H_HCTLMASK_TOGGLE; | |
219 | data_reg = sl811->data_reg; | |
220 | ||
221 | /* autoincrementing */ | |
222 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
223 | writeb(len, data_reg); | |
224 | writeb(SL_IN | ep->epnum, data_reg); | |
225 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
226 | ||
227 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); | |
16e2e5f6 | 228 | ep->length = min_t(u32, len, |
1da177e4 LT |
229 | urb->transfer_buffer_length - urb->actual_length); |
230 | PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", | |
231 | !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len); | |
232 | } | |
233 | ||
234 | /* OUT packets can be used with any type of endpoint. | |
235 | * urb->iso_frame_desc is currently ignored here... | |
236 | */ | |
237 | static void out_packet( | |
238 | struct sl811 *sl811, | |
239 | struct sl811h_ep *ep, | |
240 | struct urb *urb, | |
241 | u8 bank, | |
242 | u8 control | |
243 | ) | |
244 | { | |
245 | void *buf; | |
246 | u8 addr; | |
247 | u8 len; | |
248 | void __iomem *data_reg; | |
249 | ||
250 | buf = urb->transfer_buffer + urb->actual_length; | |
251 | prefetch(buf); | |
252 | ||
16e2e5f6 | 253 | len = min_t(u32, ep->maxpacket, |
1da177e4 LT |
254 | urb->transfer_buffer_length - urb->actual_length); |
255 | ||
256 | if (!(control & SL11H_HCTLMASK_ISOCH) | |
257 | && usb_gettoggle(urb->dev, ep->epnum, 1)) | |
258 | control |= SL11H_HCTLMASK_TOGGLE; | |
259 | addr = SL811HS_PACKET_BUF(bank == 0); | |
260 | data_reg = sl811->data_reg; | |
261 | ||
262 | sl811_write_buf(sl811, addr, buf, len); | |
263 | ||
264 | /* autoincrementing */ | |
265 | sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); | |
266 | writeb(len, data_reg); | |
267 | writeb(SL_OUT | ep->epnum, data_reg); | |
268 | writeb(usb_pipedevice(urb->pipe), data_reg); | |
269 | ||
270 | sl811_write(sl811, bank + SL11H_HOSTCTLREG, | |
271 | control | SL11H_HCTLMASK_OUT); | |
272 | ep->length = len; | |
273 | PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", | |
274 | !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len); | |
275 | } | |
276 | ||
277 | /*-------------------------------------------------------------------------*/ | |
278 | ||
279 | /* caller updates on-chip enables later */ | |
280 | ||
281 | static inline void sofirq_on(struct sl811 *sl811) | |
282 | { | |
283 | if (sl811->irq_enable & SL11H_INTMASK_SOFINTR) | |
284 | return; | |
285 | VDBG("sof irq on\n"); | |
286 | sl811->irq_enable |= SL11H_INTMASK_SOFINTR; | |
287 | } | |
288 | ||
289 | static inline void sofirq_off(struct sl811 *sl811) | |
290 | { | |
291 | if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR)) | |
292 | return; | |
293 | VDBG("sof irq off\n"); | |
294 | sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR; | |
295 | } | |
296 | ||
297 | /*-------------------------------------------------------------------------*/ | |
298 | ||
299 | /* pick the next endpoint for a transaction, and issue it. | |
300 | * frames start with periodic transfers (after whatever is pending | |
301 | * from the previous frame), and the rest of the time is async | |
302 | * transfers, scheduled round-robin. | |
303 | */ | |
304 | static struct sl811h_ep *start(struct sl811 *sl811, u8 bank) | |
305 | { | |
306 | struct sl811h_ep *ep; | |
307 | struct urb *urb; | |
308 | int fclock; | |
309 | u8 control; | |
310 | ||
311 | /* use endpoint at schedule head */ | |
312 | if (sl811->next_periodic) { | |
313 | ep = sl811->next_periodic; | |
314 | sl811->next_periodic = ep->next; | |
315 | } else { | |
316 | if (sl811->next_async) | |
317 | ep = sl811->next_async; | |
318 | else if (!list_empty(&sl811->async)) | |
319 | ep = container_of(sl811->async.next, | |
320 | struct sl811h_ep, schedule); | |
321 | else { | |
322 | /* could set up the first fullspeed periodic | |
323 | * transfer for the next frame ... | |
324 | */ | |
325 | return NULL; | |
326 | } | |
327 | ||
328 | #ifdef USE_B | |
329 | if ((bank && sl811->active_b == ep) || sl811->active_a == ep) | |
330 | return NULL; | |
331 | #endif | |
332 | ||
333 | if (ep->schedule.next == &sl811->async) | |
334 | sl811->next_async = NULL; | |
335 | else | |
336 | sl811->next_async = container_of(ep->schedule.next, | |
337 | struct sl811h_ep, schedule); | |
338 | } | |
339 | ||
340 | if (unlikely(list_empty(&ep->hep->urb_list))) { | |
341 | DBG("empty %p queue?\n", ep); | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); | |
346 | control = ep->defctrl; | |
347 | ||
348 | /* if this frame doesn't have enough time left to transfer this | |
349 | * packet, wait till the next frame. too-simple algorithm... | |
350 | */ | |
351 | fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6; | |
352 | fclock -= 100; /* setup takes not much time */ | |
353 | if (urb->dev->speed == USB_SPEED_LOW) { | |
354 | if (control & SL11H_HCTLMASK_PREAMBLE) { | |
355 | /* also note erratum 1: some hubs won't work */ | |
356 | fclock -= 800; | |
357 | } | |
358 | fclock -= ep->maxpacket << 8; | |
359 | ||
360 | /* erratum 2: AFTERSOF only works for fullspeed */ | |
361 | if (fclock < 0) { | |
362 | if (ep->period) | |
363 | sl811->stat_overrun++; | |
364 | sofirq_on(sl811); | |
365 | return NULL; | |
366 | } | |
367 | } else { | |
368 | fclock -= 12000 / 19; /* 19 64byte packets/msec */ | |
369 | if (fclock < 0) { | |
370 | if (ep->period) | |
371 | sl811->stat_overrun++; | |
372 | control |= SL11H_HCTLMASK_AFTERSOF; | |
373 | ||
374 | /* throttle bulk/control irq noise */ | |
375 | } else if (ep->nak_count) | |
376 | control |= SL11H_HCTLMASK_AFTERSOF; | |
377 | } | |
378 | ||
379 | ||
380 | switch (ep->nextpid) { | |
381 | case USB_PID_IN: | |
382 | in_packet(sl811, ep, urb, bank, control); | |
383 | break; | |
384 | case USB_PID_OUT: | |
385 | out_packet(sl811, ep, urb, bank, control); | |
386 | break; | |
387 | case USB_PID_SETUP: | |
388 | setup_packet(sl811, ep, urb, bank, control); | |
389 | break; | |
390 | case USB_PID_ACK: /* for control status */ | |
391 | status_packet(sl811, ep, urb, bank, control); | |
392 | break; | |
393 | default: | |
394 | DBG("bad ep%p pid %02x\n", ep, ep->nextpid); | |
395 | ep = NULL; | |
396 | } | |
397 | return ep; | |
398 | } | |
399 | ||
400 | #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2) | |
401 | ||
402 | static inline void start_transfer(struct sl811 *sl811) | |
403 | { | |
749da5f8 | 404 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) |
1da177e4 LT |
405 | return; |
406 | if (sl811->active_a == NULL) { | |
407 | sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF)); | |
408 | if (sl811->active_a != NULL) | |
409 | sl811->jiffies_a = jiffies + MIN_JIFFIES; | |
410 | } | |
411 | #ifdef USE_B | |
412 | if (sl811->active_b == NULL) { | |
413 | sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF)); | |
414 | if (sl811->active_b != NULL) | |
415 | sl811->jiffies_b = jiffies + MIN_JIFFIES; | |
416 | } | |
417 | #endif | |
418 | } | |
419 | ||
420 | static void finish_request( | |
421 | struct sl811 *sl811, | |
422 | struct sl811h_ep *ep, | |
423 | struct urb *urb, | |
1da177e4 LT |
424 | int status |
425 | ) __releases(sl811->lock) __acquires(sl811->lock) | |
426 | { | |
427 | unsigned i; | |
428 | ||
429 | if (usb_pipecontrol(urb->pipe)) | |
430 | ep->nextpid = USB_PID_SETUP; | |
431 | ||
e9df41c5 | 432 | usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb); |
1da177e4 | 433 | spin_unlock(&sl811->lock); |
4a00027d | 434 | usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status); |
1da177e4 LT |
435 | spin_lock(&sl811->lock); |
436 | ||
437 | /* leave active endpoints in the schedule */ | |
438 | if (!list_empty(&ep->hep->urb_list)) | |
439 | return; | |
440 | ||
441 | /* async deschedule? */ | |
442 | if (!list_empty(&ep->schedule)) { | |
443 | list_del_init(&ep->schedule); | |
444 | if (ep == sl811->next_async) | |
445 | sl811->next_async = NULL; | |
446 | return; | |
447 | } | |
448 | ||
449 | /* periodic deschedule */ | |
450 | DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); | |
451 | for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { | |
452 | struct sl811h_ep *temp; | |
453 | struct sl811h_ep **prev = &sl811->periodic[i]; | |
454 | ||
455 | while (*prev && ((temp = *prev) != ep)) | |
456 | prev = &temp->next; | |
457 | if (*prev) | |
458 | *prev = ep->next; | |
459 | sl811->load[i] -= ep->load; | |
1e9a47b6 | 460 | } |
1da177e4 LT |
461 | ep->branch = PERIODIC_SIZE; |
462 | sl811->periodic_count--; | |
463 | sl811_to_hcd(sl811)->self.bandwidth_allocated | |
464 | -= ep->load / ep->period; | |
465 | if (ep == sl811->next_periodic) | |
466 | sl811->next_periodic = ep->next; | |
467 | ||
468 | /* we might turn SOFs back on again for the async schedule */ | |
469 | if (sl811->periodic_count == 0) | |
470 | sofirq_off(sl811); | |
471 | } | |
472 | ||
473 | static void | |
7d12e780 | 474 | done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank) |
1da177e4 LT |
475 | { |
476 | u8 status; | |
477 | struct urb *urb; | |
478 | int urbstat = -EINPROGRESS; | |
479 | ||
480 | if (unlikely(!ep)) | |
481 | return; | |
482 | ||
483 | status = sl811_read(sl811, bank + SL11H_PKTSTATREG); | |
484 | ||
485 | urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); | |
486 | ||
487 | /* we can safely ignore NAKs */ | |
488 | if (status & SL11H_STATMASK_NAK) { | |
489 | // PACKET("...NAK_%02x qh%p\n", bank, ep); | |
490 | if (!ep->period) | |
491 | ep->nak_count++; | |
492 | ep->error_count = 0; | |
493 | ||
494 | /* ACK advances transfer, toggle, and maybe queue */ | |
495 | } else if (status & SL11H_STATMASK_ACK) { | |
496 | struct usb_device *udev = urb->dev; | |
497 | int len; | |
498 | unsigned char *buf; | |
499 | ||
500 | /* urb->iso_frame_desc is currently ignored here... */ | |
501 | ||
502 | ep->nak_count = ep->error_count = 0; | |
503 | switch (ep->nextpid) { | |
504 | case USB_PID_OUT: | |
505 | // PACKET("...ACK/out_%02x qh%p\n", bank, ep); | |
506 | urb->actual_length += ep->length; | |
507 | usb_dotoggle(udev, ep->epnum, 1); | |
508 | if (urb->actual_length | |
509 | == urb->transfer_buffer_length) { | |
510 | if (usb_pipecontrol(urb->pipe)) | |
511 | ep->nextpid = USB_PID_ACK; | |
512 | ||
513 | /* some bulk protocols terminate OUT transfers | |
514 | * by a short packet, using ZLPs not padding. | |
515 | */ | |
516 | else if (ep->length < ep->maxpacket | |
517 | || !(urb->transfer_flags | |
518 | & URB_ZERO_PACKET)) | |
519 | urbstat = 0; | |
520 | } | |
521 | break; | |
522 | case USB_PID_IN: | |
523 | // PACKET("...ACK/in_%02x qh%p\n", bank, ep); | |
524 | buf = urb->transfer_buffer + urb->actual_length; | |
525 | prefetchw(buf); | |
526 | len = ep->maxpacket - sl811_read(sl811, | |
527 | bank + SL11H_XFERCNTREG); | |
528 | if (len > ep->length) { | |
529 | len = ep->length; | |
65e51098 | 530 | urbstat = -EOVERFLOW; |
1da177e4 LT |
531 | } |
532 | urb->actual_length += len; | |
533 | sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0), | |
534 | buf, len); | |
535 | usb_dotoggle(udev, ep->epnum, 0); | |
65e51098 AS |
536 | if (urbstat == -EINPROGRESS && |
537 | (len < ep->maxpacket || | |
538 | urb->actual_length == | |
539 | urb->transfer_buffer_length)) { | |
540 | if (usb_pipecontrol(urb->pipe)) | |
541 | ep->nextpid = USB_PID_ACK; | |
542 | else | |
543 | urbstat = 0; | |
1da177e4 LT |
544 | } |
545 | break; | |
546 | case USB_PID_SETUP: | |
547 | // PACKET("...ACK/setup_%02x qh%p\n", bank, ep); | |
548 | if (urb->transfer_buffer_length == urb->actual_length) | |
549 | ep->nextpid = USB_PID_ACK; | |
550 | else if (usb_pipeout(urb->pipe)) { | |
551 | usb_settoggle(udev, 0, 1, 1); | |
552 | ep->nextpid = USB_PID_OUT; | |
553 | } else { | |
554 | usb_settoggle(udev, 0, 0, 1); | |
555 | ep->nextpid = USB_PID_IN; | |
556 | } | |
557 | break; | |
558 | case USB_PID_ACK: | |
559 | // PACKET("...ACK/status_%02x qh%p\n", bank, ep); | |
560 | urbstat = 0; | |
561 | break; | |
562 | } | |
563 | ||
564 | /* STALL stops all transfers */ | |
565 | } else if (status & SL11H_STATMASK_STALL) { | |
566 | PACKET("...STALL_%02x qh%p\n", bank, ep); | |
567 | ep->nak_count = ep->error_count = 0; | |
568 | urbstat = -EPIPE; | |
569 | ||
570 | /* error? retry, until "3 strikes" */ | |
571 | } else if (++ep->error_count >= 3) { | |
572 | if (status & SL11H_STATMASK_TMOUT) | |
38e2bfc9 | 573 | urbstat = -ETIME; |
1da177e4 LT |
574 | else if (status & SL11H_STATMASK_OVF) |
575 | urbstat = -EOVERFLOW; | |
576 | else | |
577 | urbstat = -EPROTO; | |
578 | ep->error_count = 0; | |
579 | PACKET("...3STRIKES_%02x %02x qh%p stat %d\n", | |
580 | bank, status, ep, urbstat); | |
581 | } | |
582 | ||
65e51098 | 583 | if (urbstat != -EINPROGRESS || urb->unlinked) |
7d12e780 | 584 | finish_request(sl811, ep, urb, urbstat); |
1da177e4 LT |
585 | } |
586 | ||
587 | static inline u8 checkdone(struct sl811 *sl811) | |
588 | { | |
589 | u8 ctl; | |
590 | u8 irqstat = 0; | |
591 | ||
592 | if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) { | |
593 | ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)); | |
594 | if (ctl & SL11H_HCTLMASK_ARM) | |
595 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); | |
596 | DBG("%s DONE_A: ctrl %02x sts %02x\n", | |
597 | (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", | |
598 | ctl, | |
599 | sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); | |
600 | irqstat |= SL11H_INTMASK_DONE_A; | |
601 | } | |
602 | #ifdef USE_B | |
603 | if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) { | |
604 | ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)); | |
605 | if (ctl & SL11H_HCTLMASK_ARM) | |
606 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); | |
607 | DBG("%s DONE_B: ctrl %02x sts %02x\n", | |
608 | (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", | |
609 | ctl, | |
610 | sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); | |
611 | irqstat |= SL11H_INTMASK_DONE_A; | |
612 | } | |
613 | #endif | |
614 | return irqstat; | |
615 | } | |
616 | ||
7d12e780 | 617 | static irqreturn_t sl811h_irq(struct usb_hcd *hcd) |
1da177e4 LT |
618 | { |
619 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
620 | u8 irqstat; | |
621 | irqreturn_t ret = IRQ_NONE; | |
622 | unsigned retries = 5; | |
623 | ||
624 | spin_lock(&sl811->lock); | |
625 | ||
626 | retry: | |
627 | irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP; | |
628 | if (irqstat) { | |
629 | sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); | |
630 | irqstat &= sl811->irq_enable; | |
631 | } | |
632 | ||
633 | #ifdef QUIRK2 | |
634 | /* this may no longer be necessary ... */ | |
1e9a47b6 | 635 | if (irqstat == 0) { |
1da177e4 | 636 | irqstat = checkdone(sl811); |
1e9a47b6 | 637 | if (irqstat) |
1da177e4 LT |
638 | sl811->stat_lost++; |
639 | } | |
640 | #endif | |
641 | ||
642 | /* USB packets, not necessarily handled in the order they're | |
643 | * issued ... that's fine if they're different endpoints. | |
644 | */ | |
645 | if (irqstat & SL11H_INTMASK_DONE_A) { | |
7d12e780 | 646 | done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF)); |
1da177e4 LT |
647 | sl811->active_a = NULL; |
648 | sl811->stat_a++; | |
649 | } | |
650 | #ifdef USE_B | |
651 | if (irqstat & SL11H_INTMASK_DONE_B) { | |
7d12e780 | 652 | done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF)); |
1da177e4 LT |
653 | sl811->active_b = NULL; |
654 | sl811->stat_b++; | |
655 | } | |
656 | #endif | |
657 | if (irqstat & SL11H_INTMASK_SOFINTR) { | |
658 | unsigned index; | |
659 | ||
660 | index = sl811->frame++ % (PERIODIC_SIZE - 1); | |
661 | sl811->stat_sof++; | |
662 | ||
663 | /* be graceful about almost-inevitable periodic schedule | |
664 | * overruns: continue the previous frame's transfers iff | |
665 | * this one has nothing scheduled. | |
666 | */ | |
667 | if (sl811->next_periodic) { | |
668 | // ERR("overrun to slot %d\n", index); | |
669 | sl811->stat_overrun++; | |
670 | } | |
671 | if (sl811->periodic[index]) | |
672 | sl811->next_periodic = sl811->periodic[index]; | |
673 | } | |
674 | ||
675 | /* khubd manages debouncing and wakeup */ | |
676 | if (irqstat & SL11H_INTMASK_INSRMV) { | |
677 | sl811->stat_insrmv++; | |
678 | ||
679 | /* most stats are reset for each VBUS session */ | |
680 | sl811->stat_wake = 0; | |
681 | sl811->stat_sof = 0; | |
682 | sl811->stat_a = 0; | |
683 | sl811->stat_b = 0; | |
684 | sl811->stat_lost = 0; | |
685 | ||
686 | sl811->ctrl1 = 0; | |
687 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
688 | ||
689 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
690 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
691 | ||
692 | /* usbcore nukes other pending transactions on disconnect */ | |
693 | if (sl811->active_a) { | |
694 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); | |
695 | finish_request(sl811, sl811->active_a, | |
1e9a47b6 DB |
696 | container_of(sl811->active_a |
697 | ->hep->urb_list.next, | |
1da177e4 | 698 | struct urb, urb_list), |
7d12e780 | 699 | -ESHUTDOWN); |
1da177e4 LT |
700 | sl811->active_a = NULL; |
701 | } | |
702 | #ifdef USE_B | |
703 | if (sl811->active_b) { | |
704 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); | |
705 | finish_request(sl811, sl811->active_b, | |
1e9a47b6 DB |
706 | container_of(sl811->active_b |
707 | ->hep->urb_list.next, | |
1da177e4 LT |
708 | struct urb, urb_list), |
709 | NULL, -ESHUTDOWN); | |
710 | sl811->active_b = NULL; | |
711 | } | |
712 | #endif | |
713 | ||
093cf723 | 714 | /* port status seems weird until after reset, so |
1da177e4 LT |
715 | * force the reset and make khubd clean up later. |
716 | */ | |
8a3461e2 | 717 | if (irqstat & SL11H_INTMASK_RD) |
749da5f8 | 718 | sl811->port1 &= ~USB_PORT_STAT_CONNECTION; |
8a3461e2 | 719 | else |
749da5f8 | 720 | sl811->port1 |= USB_PORT_STAT_CONNECTION; |
eb661bc8 | 721 | |
749da5f8 | 722 | sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 LT |
723 | |
724 | } else if (irqstat & SL11H_INTMASK_RD) { | |
749da5f8 | 725 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 726 | DBG("wakeup\n"); |
749da5f8 | 727 | sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 LT |
728 | sl811->stat_wake++; |
729 | } else | |
730 | irqstat &= ~SL11H_INTMASK_RD; | |
731 | } | |
732 | ||
733 | if (irqstat) { | |
749da5f8 | 734 | if (sl811->port1 & USB_PORT_STAT_ENABLE) |
1da177e4 LT |
735 | start_transfer(sl811); |
736 | ret = IRQ_HANDLED; | |
737 | if (retries--) | |
738 | goto retry; | |
739 | } | |
740 | ||
1e9a47b6 | 741 | if (sl811->periodic_count == 0 && list_empty(&sl811->async)) |
1da177e4 LT |
742 | sofirq_off(sl811); |
743 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
744 | ||
745 | spin_unlock(&sl811->lock); | |
746 | ||
747 | return ret; | |
748 | } | |
749 | ||
750 | /*-------------------------------------------------------------------------*/ | |
751 | ||
752 | /* usb 1.1 says max 90% of a frame is available for periodic transfers. | |
753 | * this driver doesn't promise that much since it's got to handle an | |
754 | * IRQ per packet; irq handling latencies also use up that time. | |
4b2e790a DB |
755 | * |
756 | * NOTE: the periodic schedule is a sparse tree, with the load for | |
757 | * each branch minimized. see fig 3.5 in the OHCI spec for example. | |
1da177e4 LT |
758 | */ |
759 | #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */ | |
760 | ||
761 | static int balance(struct sl811 *sl811, u16 period, u16 load) | |
762 | { | |
763 | int i, branch = -ENOSPC; | |
764 | ||
765 | /* search for the least loaded schedule branch of that period | |
766 | * which has enough bandwidth left unreserved. | |
767 | */ | |
768 | for (i = 0; i < period ; i++) { | |
769 | if (branch < 0 || sl811->load[branch] > sl811->load[i]) { | |
770 | int j; | |
771 | ||
772 | for (j = i; j < PERIODIC_SIZE; j += period) { | |
773 | if ((sl811->load[j] + load) | |
774 | > MAX_PERIODIC_LOAD) | |
775 | break; | |
776 | } | |
777 | if (j < PERIODIC_SIZE) | |
778 | continue; | |
1e9a47b6 | 779 | branch = i; |
1da177e4 LT |
780 | } |
781 | } | |
782 | return branch; | |
783 | } | |
784 | ||
785 | /*-------------------------------------------------------------------------*/ | |
786 | ||
787 | static int sl811h_urb_enqueue( | |
788 | struct usb_hcd *hcd, | |
1da177e4 | 789 | struct urb *urb, |
55016f10 | 790 | gfp_t mem_flags |
1da177e4 LT |
791 | ) { |
792 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
793 | struct usb_device *udev = urb->dev; | |
794 | unsigned int pipe = urb->pipe; | |
795 | int is_out = !usb_pipein(pipe); | |
796 | int type = usb_pipetype(pipe); | |
797 | int epnum = usb_pipeendpoint(pipe); | |
798 | struct sl811h_ep *ep = NULL; | |
799 | unsigned long flags; | |
800 | int i; | |
e9df41c5 AS |
801 | int retval; |
802 | struct usb_host_endpoint *hep = urb->ep; | |
1da177e4 | 803 | |
ad7c56f0 | 804 | #ifndef CONFIG_USB_SL811_HCD_ISO |
1da177e4 LT |
805 | if (type == PIPE_ISOCHRONOUS) |
806 | return -ENOSPC; | |
807 | #endif | |
808 | ||
809 | /* avoid all allocations within spinlocks */ | |
76be932a | 810 | if (!hep->hcpriv) { |
7b842b6e | 811 | ep = kzalloc(sizeof *ep, mem_flags); |
76be932a KV |
812 | if (ep == NULL) |
813 | return -ENOMEM; | |
814 | } | |
1da177e4 LT |
815 | |
816 | spin_lock_irqsave(&sl811->lock, flags); | |
817 | ||
818 | /* don't submit to a dead or disabled port */ | |
749da5f8 | 819 | if (!(sl811->port1 & USB_PORT_STAT_ENABLE) |
1da177e4 LT |
820 | || !HC_IS_RUNNING(hcd->state)) { |
821 | retval = -ENODEV; | |
4b2e790a | 822 | kfree(ep); |
e9df41c5 AS |
823 | goto fail_not_linked; |
824 | } | |
825 | retval = usb_hcd_link_urb_to_ep(hcd, urb); | |
826 | if (retval) { | |
827 | kfree(ep); | |
828 | goto fail_not_linked; | |
1da177e4 LT |
829 | } |
830 | ||
831 | if (hep->hcpriv) { | |
832 | kfree(ep); | |
833 | ep = hep->hcpriv; | |
834 | } else if (!ep) { | |
835 | retval = -ENOMEM; | |
836 | goto fail; | |
837 | ||
838 | } else { | |
839 | INIT_LIST_HEAD(&ep->schedule); | |
6a8e87b2 | 840 | ep->udev = udev; |
1da177e4 LT |
841 | ep->epnum = epnum; |
842 | ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out); | |
843 | ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE; | |
844 | usb_settoggle(udev, epnum, is_out, 0); | |
845 | ||
846 | if (type == PIPE_CONTROL) | |
847 | ep->nextpid = USB_PID_SETUP; | |
848 | else if (is_out) | |
849 | ep->nextpid = USB_PID_OUT; | |
850 | else | |
851 | ep->nextpid = USB_PID_IN; | |
852 | ||
853 | if (ep->maxpacket > H_MAXPACKET) { | |
854 | /* iso packets up to 240 bytes could work... */ | |
855 | DBG("dev %d ep%d maxpacket %d\n", | |
856 | udev->devnum, epnum, ep->maxpacket); | |
857 | retval = -EINVAL; | |
2bd15f1f | 858 | kfree(ep); |
1da177e4 LT |
859 | goto fail; |
860 | } | |
861 | ||
862 | if (udev->speed == USB_SPEED_LOW) { | |
863 | /* send preamble for external hub? */ | |
864 | if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD)) | |
865 | ep->defctrl |= SL11H_HCTLMASK_PREAMBLE; | |
866 | } | |
867 | switch (type) { | |
868 | case PIPE_ISOCHRONOUS: | |
869 | case PIPE_INTERRUPT: | |
870 | if (urb->interval > PERIODIC_SIZE) | |
871 | urb->interval = PERIODIC_SIZE; | |
872 | ep->period = urb->interval; | |
873 | ep->branch = PERIODIC_SIZE; | |
874 | if (type == PIPE_ISOCHRONOUS) | |
875 | ep->defctrl |= SL11H_HCTLMASK_ISOCH; | |
876 | ep->load = usb_calc_bus_time(udev->speed, !is_out, | |
877 | (type == PIPE_ISOCHRONOUS), | |
878 | usb_maxpacket(udev, pipe, is_out)) | |
879 | / 1000; | |
880 | break; | |
881 | } | |
882 | ||
1e9a47b6 | 883 | ep->hep = hep; |
1da177e4 LT |
884 | hep->hcpriv = ep; |
885 | } | |
886 | ||
887 | /* maybe put endpoint into schedule */ | |
888 | switch (type) { | |
889 | case PIPE_CONTROL: | |
890 | case PIPE_BULK: | |
891 | if (list_empty(&ep->schedule)) | |
892 | list_add_tail(&ep->schedule, &sl811->async); | |
893 | break; | |
894 | case PIPE_ISOCHRONOUS: | |
895 | case PIPE_INTERRUPT: | |
896 | urb->interval = ep->period; | |
4b2e790a DB |
897 | if (ep->branch < PERIODIC_SIZE) { |
898 | /* NOTE: the phase is correct here, but the value | |
899 | * needs offsetting by the transfer queue depth. | |
900 | * All current drivers ignore start_frame, so this | |
901 | * is unlikely to ever matter... | |
902 | */ | |
903 | urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) | |
904 | + ep->branch; | |
1da177e4 | 905 | break; |
4b2e790a | 906 | } |
1da177e4 LT |
907 | |
908 | retval = balance(sl811, ep->period, ep->load); | |
909 | if (retval < 0) | |
910 | goto fail; | |
911 | ep->branch = retval; | |
912 | retval = 0; | |
913 | urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) | |
914 | + ep->branch; | |
915 | ||
916 | /* sort each schedule branch by period (slow before fast) | |
917 | * to share the faster parts of the tree without needing | |
918 | * dummy/placeholder nodes | |
919 | */ | |
920 | DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); | |
921 | for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { | |
922 | struct sl811h_ep **prev = &sl811->periodic[i]; | |
923 | struct sl811h_ep *here = *prev; | |
924 | ||
925 | while (here && ep != here) { | |
926 | if (ep->period > here->period) | |
927 | break; | |
928 | prev = &here->next; | |
929 | here = *prev; | |
930 | } | |
931 | if (ep != here) { | |
932 | ep->next = here; | |
933 | *prev = ep; | |
934 | } | |
935 | sl811->load[i] += ep->load; | |
936 | } | |
937 | sl811->periodic_count++; | |
938 | hcd->self.bandwidth_allocated += ep->load / ep->period; | |
939 | sofirq_on(sl811); | |
940 | } | |
941 | ||
1da177e4 | 942 | urb->hcpriv = hep; |
1da177e4 LT |
943 | start_transfer(sl811); |
944 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
945 | fail: | |
e9df41c5 AS |
946 | if (retval) |
947 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
948 | fail_not_linked: | |
1da177e4 LT |
949 | spin_unlock_irqrestore(&sl811->lock, flags); |
950 | return retval; | |
951 | } | |
952 | ||
e9df41c5 | 953 | static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
954 | { |
955 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1e9a47b6 | 956 | struct usb_host_endpoint *hep; |
1da177e4 LT |
957 | unsigned long flags; |
958 | struct sl811h_ep *ep; | |
e9df41c5 | 959 | int retval; |
1da177e4 | 960 | |
1e9a47b6 | 961 | spin_lock_irqsave(&sl811->lock, flags); |
e9df41c5 AS |
962 | retval = usb_hcd_check_unlink_urb(hcd, urb, status); |
963 | if (retval) | |
1e9a47b6 | 964 | goto fail; |
1da177e4 | 965 | |
e9df41c5 | 966 | hep = urb->hcpriv; |
1da177e4 LT |
967 | ep = hep->hcpriv; |
968 | if (ep) { | |
969 | /* finish right away if this urb can't be active ... | |
970 | * note that some drivers wrongly expect delays | |
971 | */ | |
972 | if (ep->hep->urb_list.next != &urb->urb_list) { | |
973 | /* not front of queue? never active */ | |
974 | ||
975 | /* for active transfers, we expect an IRQ */ | |
976 | } else if (sl811->active_a == ep) { | |
977 | if (time_before_eq(sl811->jiffies_a, jiffies)) { | |
978 | /* happens a lot with lowspeed?? */ | |
979 | DBG("giveup on DONE_A: ctrl %02x sts %02x\n", | |
980 | sl811_read(sl811, | |
981 | SL811_EP_A(SL11H_HOSTCTLREG)), | |
982 | sl811_read(sl811, | |
983 | SL811_EP_A(SL11H_PKTSTATREG))); | |
984 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), | |
985 | 0); | |
986 | sl811->active_a = NULL; | |
987 | } else | |
988 | urb = NULL; | |
989 | #ifdef USE_B | |
990 | } else if (sl811->active_b == ep) { | |
991 | if (time_before_eq(sl811->jiffies_a, jiffies)) { | |
992 | /* happens a lot with lowspeed?? */ | |
993 | DBG("giveup on DONE_B: ctrl %02x sts %02x\n", | |
994 | sl811_read(sl811, | |
995 | SL811_EP_B(SL11H_HOSTCTLREG)), | |
996 | sl811_read(sl811, | |
997 | SL811_EP_B(SL11H_PKTSTATREG))); | |
998 | sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), | |
999 | 0); | |
1000 | sl811->active_b = NULL; | |
1001 | } else | |
1002 | urb = NULL; | |
1003 | #endif | |
1004 | } else { | |
1005 | /* front of queue for inactive endpoint */ | |
1006 | } | |
1007 | ||
1008 | if (urb) | |
7d12e780 | 1009 | finish_request(sl811, ep, urb, 0); |
1da177e4 LT |
1010 | else |
1011 | VDBG("dequeue, urb %p active %s; wait4irq\n", urb, | |
1012 | (sl811->active_a == ep) ? "A" : "B"); | |
1013 | } else | |
1014 | retval = -EINVAL; | |
e9df41c5 | 1015 | fail: |
1da177e4 LT |
1016 | spin_unlock_irqrestore(&sl811->lock, flags); |
1017 | return retval; | |
1018 | } | |
1019 | ||
1020 | static void | |
1021 | sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep) | |
1022 | { | |
1023 | struct sl811h_ep *ep = hep->hcpriv; | |
1024 | ||
1025 | if (!ep) | |
1026 | return; | |
1027 | ||
1028 | /* assume we'd just wait for the irq */ | |
1029 | if (!list_empty(&hep->urb_list)) | |
1030 | msleep(3); | |
1031 | if (!list_empty(&hep->urb_list)) | |
b6c63937 | 1032 | WARNING("ep %p not empty?\n", ep); |
1da177e4 | 1033 | |
1da177e4 LT |
1034 | kfree(ep); |
1035 | hep->hcpriv = NULL; | |
1036 | } | |
1037 | ||
1038 | static int | |
1039 | sl811h_get_frame(struct usb_hcd *hcd) | |
1040 | { | |
1041 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1042 | ||
1043 | /* wrong except while periodic transfers are scheduled; | |
1044 | * never matches the on-the-wire frame; | |
1045 | * subject to overruns. | |
1046 | */ | |
1047 | return sl811->frame; | |
1048 | } | |
1049 | ||
1050 | ||
1051 | /*-------------------------------------------------------------------------*/ | |
1052 | ||
1053 | /* the virtual root hub timer IRQ checks for hub status */ | |
1054 | static int | |
1055 | sl811h_hub_status_data(struct usb_hcd *hcd, char *buf) | |
1056 | { | |
1057 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1058 | #ifdef QUIRK3 | |
1059 | unsigned long flags; | |
1060 | ||
1061 | /* non-SMP HACK: use root hub timer as i/o watchdog | |
1062 | * this seems essential when SOF IRQs aren't in use... | |
1063 | */ | |
1064 | local_irq_save(flags); | |
1065 | if (!timer_pending(&sl811->timer)) { | |
7d12e780 | 1066 | if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE) |
1da177e4 LT |
1067 | sl811->stat_lost++; |
1068 | } | |
1069 | local_irq_restore(flags); | |
1070 | #endif | |
1071 | ||
1072 | if (!(sl811->port1 & (0xffff << 16))) | |
1073 | return 0; | |
1074 | ||
1075 | /* tell khubd port 1 changed */ | |
1076 | *buf = (1 << 1); | |
1077 | return 1; | |
1078 | } | |
1079 | ||
1080 | static void | |
1081 | sl811h_hub_descriptor ( | |
1082 | struct sl811 *sl811, | |
1083 | struct usb_hub_descriptor *desc | |
1084 | ) { | |
1085 | u16 temp = 0; | |
1086 | ||
1087 | desc->bDescriptorType = 0x29; | |
1088 | desc->bHubContrCurrent = 0; | |
1089 | ||
1090 | desc->bNbrPorts = 1; | |
1091 | desc->bDescLength = 9; | |
1092 | ||
1093 | /* per-port power switching (gang of one!), or none */ | |
1094 | desc->bPwrOn2PwrGood = 0; | |
1095 | if (sl811->board && sl811->board->port_power) { | |
1096 | desc->bPwrOn2PwrGood = sl811->board->potpg; | |
1097 | if (!desc->bPwrOn2PwrGood) | |
1098 | desc->bPwrOn2PwrGood = 10; | |
1099 | temp = 0x0001; | |
1100 | } else | |
1101 | temp = 0x0002; | |
1102 | ||
1103 | /* no overcurrent errors detection/handling */ | |
1104 | temp |= 0x0010; | |
1105 | ||
fd05e720 | 1106 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 | 1107 | |
da13051c | 1108 | /* ports removable, and legacy PortPwrCtrlMask */ |
dbe79bbe JY |
1109 | desc->u.hs.DeviceRemovable[0] = 0 << 1; |
1110 | desc->u.hs.DeviceRemovable[1] = ~0; | |
1da177e4 LT |
1111 | } |
1112 | ||
1113 | static void | |
1114 | sl811h_timer(unsigned long _sl811) | |
1115 | { | |
1116 | struct sl811 *sl811 = (void *) _sl811; | |
1117 | unsigned long flags; | |
1118 | u8 irqstat; | |
1119 | u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE; | |
749da5f8 AS |
1120 | const u32 mask = USB_PORT_STAT_CONNECTION |
1121 | | USB_PORT_STAT_ENABLE | |
288ead45 | 1122 | | USB_PORT_STAT_LOW_SPEED; |
1da177e4 LT |
1123 | |
1124 | spin_lock_irqsave(&sl811->lock, flags); | |
1125 | ||
1126 | /* stop special signaling */ | |
1127 | sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE; | |
1128 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1129 | udelay(3); | |
1130 | ||
1131 | irqstat = sl811_read(sl811, SL11H_IRQ_STATUS); | |
1132 | ||
1133 | switch (signaling) { | |
1134 | case SL11H_CTL1MASK_SE0: | |
1135 | DBG("end reset\n"); | |
749da5f8 AS |
1136 | sl811->port1 = (USB_PORT_STAT_C_RESET << 16) |
1137 | | USB_PORT_STAT_POWER; | |
1da177e4 LT |
1138 | sl811->ctrl1 = 0; |
1139 | /* don't wrongly ack RD */ | |
1140 | if (irqstat & SL11H_INTMASK_INSRMV) | |
1141 | irqstat &= ~SL11H_INTMASK_RD; | |
1142 | break; | |
1143 | case SL11H_CTL1MASK_K: | |
1144 | DBG("end resume\n"); | |
749da5f8 | 1145 | sl811->port1 &= ~USB_PORT_STAT_SUSPEND; |
1da177e4 LT |
1146 | break; |
1147 | default: | |
1148 | DBG("odd timer signaling: %02x\n", signaling); | |
1149 | break; | |
1150 | } | |
1151 | sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); | |
1152 | ||
1153 | if (irqstat & SL11H_INTMASK_RD) { | |
1154 | /* usbcore nukes all pending transactions on disconnect */ | |
749da5f8 AS |
1155 | if (sl811->port1 & USB_PORT_STAT_CONNECTION) |
1156 | sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16) | |
1157 | | (USB_PORT_STAT_C_ENABLE << 16); | |
1da177e4 LT |
1158 | sl811->port1 &= ~mask; |
1159 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
1160 | } else { | |
1161 | sl811->port1 |= mask; | |
1162 | if (irqstat & SL11H_INTMASK_DP) | |
288ead45 | 1163 | sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED; |
1da177e4 LT |
1164 | sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD; |
1165 | } | |
1166 | ||
749da5f8 | 1167 | if (sl811->port1 & USB_PORT_STAT_CONNECTION) { |
1da177e4 LT |
1168 | u8 ctrl2 = SL811HS_CTL2_INIT; |
1169 | ||
1170 | sl811->irq_enable |= SL11H_INTMASK_DONE_A; | |
1171 | #ifdef USE_B | |
1172 | sl811->irq_enable |= SL11H_INTMASK_DONE_B; | |
1173 | #endif | |
288ead45 | 1174 | if (sl811->port1 & USB_PORT_STAT_LOW_SPEED) { |
1da177e4 LT |
1175 | sl811->ctrl1 |= SL11H_CTL1MASK_LSPD; |
1176 | ctrl2 |= SL811HS_CTL2MASK_DSWAP; | |
1177 | } | |
1178 | ||
1179 | /* start SOFs flowing, kickstarting with A registers */ | |
1180 | sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA; | |
1181 | sl811_write(sl811, SL11H_SOFLOWREG, 0xe0); | |
1182 | sl811_write(sl811, SL811HS_CTLREG2, ctrl2); | |
1183 | ||
1184 | /* autoincrementing */ | |
1185 | sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0); | |
1186 | writeb(SL_SOF, sl811->data_reg); | |
1187 | writeb(0, sl811->data_reg); | |
1188 | sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), | |
1189 | SL11H_HCTLMASK_ARM); | |
1190 | ||
1191 | /* khubd provides debounce delay */ | |
1192 | } else { | |
1193 | sl811->ctrl1 = 0; | |
1194 | } | |
1195 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1196 | ||
1197 | /* reenable irqs */ | |
1198 | sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); | |
1199 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1200 | } | |
1201 | ||
1202 | static int | |
1203 | sl811h_hub_control( | |
1204 | struct usb_hcd *hcd, | |
1205 | u16 typeReq, | |
1206 | u16 wValue, | |
1207 | u16 wIndex, | |
1208 | char *buf, | |
1209 | u16 wLength | |
1210 | ) { | |
1211 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1212 | int retval = 0; | |
1213 | unsigned long flags; | |
1214 | ||
1215 | spin_lock_irqsave(&sl811->lock, flags); | |
1216 | ||
1217 | switch (typeReq) { | |
1218 | case ClearHubFeature: | |
1219 | case SetHubFeature: | |
1220 | switch (wValue) { | |
1221 | case C_HUB_OVER_CURRENT: | |
1222 | case C_HUB_LOCAL_POWER: | |
1223 | break; | |
1224 | default: | |
1225 | goto error; | |
1226 | } | |
1227 | break; | |
1228 | case ClearPortFeature: | |
1229 | if (wIndex != 1 || wLength != 0) | |
1230 | goto error; | |
1231 | ||
1232 | switch (wValue) { | |
1233 | case USB_PORT_FEAT_ENABLE: | |
749da5f8 | 1234 | sl811->port1 &= USB_PORT_STAT_POWER; |
1da177e4 LT |
1235 | sl811->ctrl1 = 0; |
1236 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1237 | sl811->irq_enable = SL11H_INTMASK_INSRMV; | |
1238 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1239 | sl811->irq_enable); | |
1240 | break; | |
1241 | case USB_PORT_FEAT_SUSPEND: | |
749da5f8 | 1242 | if (!(sl811->port1 & USB_PORT_STAT_SUSPEND)) |
1da177e4 LT |
1243 | break; |
1244 | ||
1245 | /* 20 msec of resume/K signaling, other irqs blocked */ | |
1246 | DBG("start resume...\n"); | |
1247 | sl811->irq_enable = 0; | |
1248 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1249 | sl811->irq_enable); | |
1250 | sl811->ctrl1 |= SL11H_CTL1MASK_K; | |
1251 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1252 | ||
1253 | mod_timer(&sl811->timer, jiffies | |
1254 | + msecs_to_jiffies(20)); | |
1255 | break; | |
1256 | case USB_PORT_FEAT_POWER: | |
1257 | port_power(sl811, 0); | |
1258 | break; | |
1259 | case USB_PORT_FEAT_C_ENABLE: | |
1260 | case USB_PORT_FEAT_C_SUSPEND: | |
1261 | case USB_PORT_FEAT_C_CONNECTION: | |
1262 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
1263 | case USB_PORT_FEAT_C_RESET: | |
1264 | break; | |
1265 | default: | |
1266 | goto error; | |
1267 | } | |
1268 | sl811->port1 &= ~(1 << wValue); | |
1269 | break; | |
1270 | case GetHubDescriptor: | |
1271 | sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf); | |
1272 | break; | |
1273 | case GetHubStatus: | |
8ca5bfab | 1274 | put_unaligned_le32(0, buf); |
1da177e4 LT |
1275 | break; |
1276 | case GetPortStatus: | |
1277 | if (wIndex != 1) | |
1278 | goto error; | |
8ca5bfab | 1279 | put_unaligned_le32(sl811->port1, buf); |
1da177e4 LT |
1280 | |
1281 | #ifndef VERBOSE | |
1282 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ | |
1283 | #endif | |
1284 | DBG("GetPortStatus %08x\n", sl811->port1); | |
1285 | break; | |
1286 | case SetPortFeature: | |
1287 | if (wIndex != 1 || wLength != 0) | |
1288 | goto error; | |
1289 | switch (wValue) { | |
1290 | case USB_PORT_FEAT_SUSPEND: | |
749da5f8 | 1291 | if (sl811->port1 & USB_PORT_STAT_RESET) |
1da177e4 | 1292 | goto error; |
749da5f8 | 1293 | if (!(sl811->port1 & USB_PORT_STAT_ENABLE)) |
1da177e4 LT |
1294 | goto error; |
1295 | ||
1296 | DBG("suspend...\n"); | |
1297 | sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA; | |
1298 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
1299 | break; | |
1300 | case USB_PORT_FEAT_POWER: | |
1301 | port_power(sl811, 1); | |
1302 | break; | |
1303 | case USB_PORT_FEAT_RESET: | |
749da5f8 | 1304 | if (sl811->port1 & USB_PORT_STAT_SUSPEND) |
1da177e4 | 1305 | goto error; |
749da5f8 | 1306 | if (!(sl811->port1 & USB_PORT_STAT_POWER)) |
1da177e4 LT |
1307 | break; |
1308 | ||
1309 | /* 50 msec of reset/SE0 signaling, irqs blocked */ | |
1310 | sl811->irq_enable = 0; | |
1311 | sl811_write(sl811, SL11H_IRQ_ENABLE, | |
1312 | sl811->irq_enable); | |
1313 | sl811->ctrl1 = SL11H_CTL1MASK_SE0; | |
1314 | sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); | |
749da5f8 | 1315 | sl811->port1 |= USB_PORT_STAT_RESET; |
1da177e4 LT |
1316 | mod_timer(&sl811->timer, jiffies |
1317 | + msecs_to_jiffies(50)); | |
1318 | break; | |
1319 | default: | |
1320 | goto error; | |
1321 | } | |
1322 | sl811->port1 |= 1 << wValue; | |
1323 | break; | |
1324 | ||
1325 | default: | |
1326 | error: | |
1327 | /* "protocol stall" on error */ | |
1328 | retval = -EPIPE; | |
1329 | } | |
1330 | ||
1331 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1332 | return retval; | |
1333 | } | |
1334 | ||
1335 | #ifdef CONFIG_PM | |
1336 | ||
1337 | static int | |
0c0382e3 | 1338 | sl811h_bus_suspend(struct usb_hcd *hcd) |
1da177e4 LT |
1339 | { |
1340 | // SOFs off | |
441b62c1 | 1341 | DBG("%s\n", __func__); |
1da177e4 LT |
1342 | return 0; |
1343 | } | |
1344 | ||
1345 | static int | |
0c0382e3 | 1346 | sl811h_bus_resume(struct usb_hcd *hcd) |
1da177e4 LT |
1347 | { |
1348 | // SOFs on | |
441b62c1 | 1349 | DBG("%s\n", __func__); |
1da177e4 LT |
1350 | return 0; |
1351 | } | |
1352 | ||
1353 | #else | |
1354 | ||
0c0382e3 AS |
1355 | #define sl811h_bus_suspend NULL |
1356 | #define sl811h_bus_resume NULL | |
1da177e4 LT |
1357 | |
1358 | #endif | |
1359 | ||
1360 | ||
1361 | /*-------------------------------------------------------------------------*/ | |
1362 | ||
1363 | #ifdef STUB_DEBUG_FILE | |
1364 | ||
1365 | static inline void create_debug_file(struct sl811 *sl811) { } | |
1366 | static inline void remove_debug_file(struct sl811 *sl811) { } | |
1367 | ||
1368 | #else | |
1369 | ||
1370 | #include <linux/proc_fs.h> | |
1371 | #include <linux/seq_file.h> | |
1372 | ||
1373 | static void dump_irq(struct seq_file *s, char *label, u8 mask) | |
1374 | { | |
1375 | seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask, | |
1376 | (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "", | |
1377 | (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "", | |
1378 | (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "", | |
1379 | (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "", | |
1380 | (mask & SL11H_INTMASK_RD) ? " rd" : "", | |
1381 | (mask & SL11H_INTMASK_DP) ? " dp" : ""); | |
1382 | } | |
1383 | ||
1384 | static int proc_sl811h_show(struct seq_file *s, void *unused) | |
1385 | { | |
1386 | struct sl811 *sl811 = s->private; | |
1387 | struct sl811h_ep *ep; | |
1388 | unsigned i; | |
1389 | ||
1390 | seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n", | |
1391 | sl811_to_hcd(sl811)->product_desc, | |
1392 | hcd_name, DRIVER_VERSION, | |
1393 | sl811->port1); | |
1394 | ||
1395 | seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv); | |
1396 | seq_printf(s, "current session: done_a %ld done_b %ld " | |
1397 | "wake %ld sof %ld overrun %ld lost %ld\n\n", | |
1398 | sl811->stat_a, sl811->stat_b, | |
1399 | sl811->stat_wake, sl811->stat_sof, | |
1400 | sl811->stat_overrun, sl811->stat_lost); | |
1401 | ||
1402 | spin_lock_irq(&sl811->lock); | |
1403 | ||
1404 | if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND) | |
1405 | seq_printf(s, "(suspended)\n\n"); | |
1406 | else { | |
1407 | u8 t = sl811_read(sl811, SL11H_CTLREG1); | |
1408 | ||
1409 | seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t, | |
1410 | (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "", | |
1411 | ({char *s; switch (t & SL11H_CTL1MASK_FORCE) { | |
1412 | case SL11H_CTL1MASK_NORMAL: s = ""; break; | |
1413 | case SL11H_CTL1MASK_SE0: s = " se0/reset"; break; | |
1414 | case SL11H_CTL1MASK_K: s = " k/resume"; break; | |
1415 | default: s = "j"; break; | |
1416 | }; s; }), | |
1417 | (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "", | |
1418 | (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : ""); | |
1419 | ||
1420 | dump_irq(s, "irq_enable", | |
1421 | sl811_read(sl811, SL11H_IRQ_ENABLE)); | |
1422 | dump_irq(s, "irq_status", | |
1423 | sl811_read(sl811, SL11H_IRQ_STATUS)); | |
1424 | seq_printf(s, "frame clocks remaining: %d\n", | |
1425 | sl811_read(sl811, SL11H_SOFTMRREG) << 6); | |
1426 | } | |
1427 | ||
1428 | seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a, | |
1429 | sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)), | |
1430 | sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); | |
1431 | seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b, | |
1432 | sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)), | |
1433 | sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); | |
1434 | seq_printf(s, "\n"); | |
1435 | list_for_each_entry (ep, &sl811->async, schedule) { | |
1436 | struct urb *urb; | |
1437 | ||
1438 | seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d" | |
1439 | " nak %d err %d\n", | |
1440 | (ep == sl811->active_a) ? "(A) " : "", | |
1441 | (ep == sl811->active_b) ? "(B) " : "", | |
1442 | ep, ep->epnum, | |
1443 | ({ char *s; switch (ep->nextpid) { | |
1444 | case USB_PID_IN: s = "in"; break; | |
1445 | case USB_PID_OUT: s = "out"; break; | |
1446 | case USB_PID_SETUP: s = "setup"; break; | |
1447 | case USB_PID_ACK: s = "status"; break; | |
1448 | default: s = "?"; break; | |
1449 | }; s;}), | |
1450 | ep->maxpacket, | |
1451 | ep->nak_count, ep->error_count); | |
1452 | list_for_each_entry (urb, &ep->hep->urb_list, urb_list) { | |
1453 | seq_printf(s, " urb%p, %d/%d\n", urb, | |
1454 | urb->actual_length, | |
1455 | urb->transfer_buffer_length); | |
1456 | } | |
1457 | } | |
1458 | if (!list_empty(&sl811->async)) | |
1459 | seq_printf(s, "\n"); | |
1460 | ||
1461 | seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE); | |
1462 | ||
1463 | for (i = 0; i < PERIODIC_SIZE; i++) { | |
1464 | ep = sl811->periodic[i]; | |
1465 | if (!ep) | |
1466 | continue; | |
1467 | seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]); | |
1468 | ||
1469 | /* DUMB: prints shared entries multiple times */ | |
1470 | do { | |
1471 | seq_printf(s, | |
1472 | " %s%sqh%d/%p (%sdev%d ep%d%s max %d) " | |
1473 | "err %d\n", | |
1474 | (ep == sl811->active_a) ? "(A) " : "", | |
1475 | (ep == sl811->active_b) ? "(B) " : "", | |
1476 | ep->period, ep, | |
1477 | (ep->udev->speed == USB_SPEED_FULL) | |
1478 | ? "" : "ls ", | |
1479 | ep->udev->devnum, ep->epnum, | |
1480 | (ep->epnum == 0) ? "" | |
1481 | : ((ep->nextpid == USB_PID_IN) | |
1482 | ? "in" | |
1483 | : "out"), | |
1484 | ep->maxpacket, ep->error_count); | |
1485 | ep = ep->next; | |
1486 | } while (ep); | |
1487 | } | |
1488 | ||
1489 | spin_unlock_irq(&sl811->lock); | |
1490 | seq_printf(s, "\n"); | |
1491 | ||
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | static int proc_sl811h_open(struct inode *inode, struct file *file) | |
1496 | { | |
1497 | return single_open(file, proc_sl811h_show, PDE(inode)->data); | |
1498 | } | |
1499 | ||
066202dd | 1500 | static const struct file_operations proc_ops = { |
1da177e4 LT |
1501 | .open = proc_sl811h_open, |
1502 | .read = seq_read, | |
1503 | .llseek = seq_lseek, | |
1504 | .release = single_release, | |
1505 | }; | |
1506 | ||
1507 | /* expect just one sl811 per system */ | |
1508 | static const char proc_filename[] = "driver/sl811h"; | |
1509 | ||
1510 | static void create_debug_file(struct sl811 *sl811) | |
1511 | { | |
cdefa185 | 1512 | sl811->pde = proc_create_data(proc_filename, 0, NULL, &proc_ops, sl811); |
1da177e4 LT |
1513 | } |
1514 | ||
1515 | static void remove_debug_file(struct sl811 *sl811) | |
1516 | { | |
1517 | if (sl811->pde) | |
1518 | remove_proc_entry(proc_filename, NULL); | |
1519 | } | |
1520 | ||
1521 | #endif | |
1522 | ||
1523 | /*-------------------------------------------------------------------------*/ | |
1524 | ||
1525 | static void | |
1526 | sl811h_stop(struct usb_hcd *hcd) | |
1527 | { | |
1528 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1529 | unsigned long flags; | |
1530 | ||
1531 | del_timer_sync(&hcd->rh_timer); | |
1532 | ||
1533 | spin_lock_irqsave(&sl811->lock, flags); | |
1534 | port_power(sl811, 0); | |
1535 | spin_unlock_irqrestore(&sl811->lock, flags); | |
1536 | } | |
1537 | ||
1538 | static int | |
1539 | sl811h_start(struct usb_hcd *hcd) | |
1540 | { | |
1541 | struct sl811 *sl811 = hcd_to_sl811(hcd); | |
1da177e4 LT |
1542 | |
1543 | /* chip has been reset, VBUS power is off */ | |
1da177e4 LT |
1544 | hcd->state = HC_STATE_RUNNING; |
1545 | ||
bc96c0ad | 1546 | if (sl811->board) { |
0c8624f9 DB |
1547 | if (!device_can_wakeup(hcd->self.controller)) |
1548 | device_init_wakeup(hcd->self.controller, | |
1549 | sl811->board->can_wakeup); | |
bc96c0ad AS |
1550 | hcd->power_budget = sl811->board->power * 2; |
1551 | } | |
1da177e4 | 1552 | |
3a4fa0a2 | 1553 | /* enable power and interrupts */ |
1e9a47b6 DB |
1554 | port_power(sl811, 1); |
1555 | ||
1da177e4 LT |
1556 | return 0; |
1557 | } | |
1558 | ||
1559 | /*-------------------------------------------------------------------------*/ | |
1560 | ||
1561 | static struct hc_driver sl811h_hc_driver = { | |
1562 | .description = hcd_name, | |
1563 | .hcd_priv_size = sizeof(struct sl811), | |
1564 | ||
1565 | /* | |
1566 | * generic hardware linkage | |
1567 | */ | |
1568 | .irq = sl811h_irq, | |
1569 | .flags = HCD_USB11 | HCD_MEMORY, | |
1570 | ||
1571 | /* Basic lifecycle operations */ | |
1572 | .start = sl811h_start, | |
1573 | .stop = sl811h_stop, | |
1574 | ||
1575 | /* | |
1576 | * managing i/o requests and associated device resources | |
1577 | */ | |
1578 | .urb_enqueue = sl811h_urb_enqueue, | |
1579 | .urb_dequeue = sl811h_urb_dequeue, | |
1580 | .endpoint_disable = sl811h_endpoint_disable, | |
1581 | ||
1582 | /* | |
1583 | * periodic schedule support | |
1584 | */ | |
1585 | .get_frame_number = sl811h_get_frame, | |
1586 | ||
1587 | /* | |
1588 | * root hub support | |
1589 | */ | |
1590 | .hub_status_data = sl811h_hub_status_data, | |
1591 | .hub_control = sl811h_hub_control, | |
0c0382e3 AS |
1592 | .bus_suspend = sl811h_bus_suspend, |
1593 | .bus_resume = sl811h_bus_resume, | |
1da177e4 LT |
1594 | }; |
1595 | ||
1596 | /*-------------------------------------------------------------------------*/ | |
1597 | ||
1e9a47b6 | 1598 | static int __devexit |
3ae5eaec | 1599 | sl811h_remove(struct platform_device *dev) |
1da177e4 | 1600 | { |
3ae5eaec | 1601 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 | 1602 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1da177e4 LT |
1603 | struct resource *res; |
1604 | ||
1da177e4 LT |
1605 | remove_debug_file(sl811); |
1606 | usb_remove_hcd(hcd); | |
1607 | ||
1e9a47b6 | 1608 | /* some platforms may use IORESOURCE_IO */ |
3ae5eaec | 1609 | res = platform_get_resource(dev, IORESOURCE_MEM, 1); |
1e9a47b6 DB |
1610 | if (res) |
1611 | iounmap(sl811->data_reg); | |
1da177e4 | 1612 | |
3ae5eaec | 1613 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1e9a47b6 DB |
1614 | if (res) |
1615 | iounmap(sl811->addr_reg); | |
1da177e4 LT |
1616 | |
1617 | usb_put_hcd(hcd); | |
1618 | return 0; | |
1619 | } | |
1620 | ||
1e9a47b6 | 1621 | static int __devinit |
3ae5eaec | 1622 | sl811h_probe(struct platform_device *dev) |
1da177e4 LT |
1623 | { |
1624 | struct usb_hcd *hcd; | |
1625 | struct sl811 *sl811; | |
27140219 | 1626 | struct resource *addr, *data, *ires; |
1da177e4 LT |
1627 | int irq; |
1628 | void __iomem *addr_reg; | |
1629 | void __iomem *data_reg; | |
1630 | int retval; | |
1e9a47b6 | 1631 | u8 tmp, ioaddr = 0; |
27140219 | 1632 | unsigned long irqflags; |
1da177e4 | 1633 | |
6ef1a927 TK |
1634 | if (usb_disabled()) |
1635 | return -ENODEV; | |
1636 | ||
1da177e4 LT |
1637 | /* basic sanity checks first. board-specific init logic should |
1638 | * have initialized these three resources and probably board | |
1639 | * specific platform_data. we don't probe for IRQs, and do only | |
1640 | * minimal sanity checking. | |
1641 | */ | |
27140219 MZ |
1642 | ires = platform_get_resource(dev, IORESOURCE_IRQ, 0); |
1643 | if (dev->num_resources < 3 || !ires) | |
1da177e4 LT |
1644 | return -ENODEV; |
1645 | ||
27140219 MZ |
1646 | irq = ires->start; |
1647 | irqflags = ires->flags & IRQF_TRIGGER_MASK; | |
1648 | ||
1da177e4 | 1649 | /* refuse to confuse usbcore */ |
3ae5eaec | 1650 | if (dev->dev.dma_mask) { |
1da177e4 LT |
1651 | DBG("no we won't dma\n"); |
1652 | return -EINVAL; | |
1653 | } | |
1654 | ||
1e9a47b6 | 1655 | /* the chip may be wired for either kind of addressing */ |
3ae5eaec RK |
1656 | addr = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1657 | data = platform_get_resource(dev, IORESOURCE_MEM, 1); | |
1e9a47b6 DB |
1658 | retval = -EBUSY; |
1659 | if (!addr || !data) { | |
3ae5eaec RK |
1660 | addr = platform_get_resource(dev, IORESOURCE_IO, 0); |
1661 | data = platform_get_resource(dev, IORESOURCE_IO, 1); | |
1e9a47b6 DB |
1662 | if (!addr || !data) |
1663 | return -ENODEV; | |
1664 | ioaddr = 1; | |
2427ddd8 GKH |
1665 | /* |
1666 | * NOTE: 64-bit resource->start is getting truncated | |
1667 | * to avoid compiler warning, assuming that ->start | |
1668 | * is always 32-bit for this case | |
1669 | */ | |
1670 | addr_reg = (void __iomem *) (unsigned long) addr->start; | |
1671 | data_reg = (void __iomem *) (unsigned long) data->start; | |
1e9a47b6 DB |
1672 | } else { |
1673 | addr_reg = ioremap(addr->start, 1); | |
1674 | if (addr_reg == NULL) { | |
1675 | retval = -ENOMEM; | |
1676 | goto err2; | |
1677 | } | |
1da177e4 | 1678 | |
1e9a47b6 DB |
1679 | data_reg = ioremap(data->start, 1); |
1680 | if (data_reg == NULL) { | |
1681 | retval = -ENOMEM; | |
1682 | goto err4; | |
1683 | } | |
1da177e4 LT |
1684 | } |
1685 | ||
1686 | /* allocate and initialize hcd */ | |
7071a3ce | 1687 | hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev)); |
1da177e4 LT |
1688 | if (!hcd) { |
1689 | retval = -ENOMEM; | |
1690 | goto err5; | |
1691 | } | |
1692 | hcd->rsrc_start = addr->start; | |
1693 | sl811 = hcd_to_sl811(hcd); | |
1694 | ||
1695 | spin_lock_init(&sl811->lock); | |
1696 | INIT_LIST_HEAD(&sl811->async); | |
3ae5eaec | 1697 | sl811->board = dev->dev.platform_data; |
1da177e4 LT |
1698 | init_timer(&sl811->timer); |
1699 | sl811->timer.function = sl811h_timer; | |
1700 | sl811->timer.data = (unsigned long) sl811; | |
1701 | sl811->addr_reg = addr_reg; | |
1702 | sl811->data_reg = data_reg; | |
1703 | ||
1704 | spin_lock_irq(&sl811->lock); | |
1705 | port_power(sl811, 0); | |
1706 | spin_unlock_irq(&sl811->lock); | |
1707 | msleep(200); | |
1708 | ||
1709 | tmp = sl811_read(sl811, SL11H_HWREVREG); | |
1710 | switch (tmp >> 4) { | |
1711 | case 1: | |
1712 | hcd->product_desc = "SL811HS v1.2"; | |
1713 | break; | |
1714 | case 2: | |
1715 | hcd->product_desc = "SL811HS v1.5"; | |
1716 | break; | |
1717 | default: | |
1718 | /* reject case 0, SL11S is less functional */ | |
1719 | DBG("chiprev %02x\n", tmp); | |
1720 | retval = -ENXIO; | |
1721 | goto err6; | |
1722 | } | |
1723 | ||
1e9a47b6 DB |
1724 | /* The chip's IRQ is level triggered, active high. A requirement |
1725 | * for platform device setup is to cope with things like signal | |
1726 | * inverters (e.g. CF is active low) or working only with edge | |
1727 | * triggers (e.g. most ARM CPUs). Initial driver stress testing | |
1728 | * was on a system with single edge triggering, so most sorts of | |
1729 | * triggering arrangement should work. | |
27140219 MZ |
1730 | * |
1731 | * Use resource IRQ flags if set by platform device setup. | |
1e9a47b6 | 1732 | */ |
27140219 | 1733 | irqflags |= IRQF_SHARED; |
b5dd18d8 | 1734 | retval = usb_add_hcd(hcd, irq, irqflags); |
1da177e4 LT |
1735 | if (retval != 0) |
1736 | goto err6; | |
1737 | ||
1738 | create_debug_file(sl811); | |
1739 | return retval; | |
1740 | ||
1741 | err6: | |
1742 | usb_put_hcd(hcd); | |
1743 | err5: | |
1e9a47b6 DB |
1744 | if (!ioaddr) |
1745 | iounmap(data_reg); | |
1da177e4 | 1746 | err4: |
1e9a47b6 DB |
1747 | if (!ioaddr) |
1748 | iounmap(addr_reg); | |
1da177e4 | 1749 | err2: |
1da177e4 LT |
1750 | DBG("init error, %d\n", retval); |
1751 | return retval; | |
1752 | } | |
1753 | ||
1754 | #ifdef CONFIG_PM | |
1755 | ||
1756 | /* for this device there's no useful distinction between the controller | |
1e9a47b6 | 1757 | * and its root hub, except that the root hub only gets direct PM calls |
1da177e4 LT |
1758 | * when CONFIG_USB_SUSPEND is enabled. |
1759 | */ | |
1760 | ||
1761 | static int | |
3ae5eaec | 1762 | sl811h_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 1763 | { |
3ae5eaec | 1764 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
1765 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1766 | int retval = 0; | |
1767 | ||
18584999 DB |
1768 | switch (state.event) { |
1769 | case PM_EVENT_FREEZE: | |
0c0382e3 | 1770 | retval = sl811h_bus_suspend(hcd); |
18584999 DB |
1771 | break; |
1772 | case PM_EVENT_SUSPEND: | |
3a2d5b70 | 1773 | case PM_EVENT_HIBERNATE: |
18584999 | 1774 | case PM_EVENT_PRETHAW: /* explicitly discard hw state */ |
1da177e4 | 1775 | port_power(sl811, 0); |
18584999 DB |
1776 | break; |
1777 | } | |
1da177e4 LT |
1778 | return retval; |
1779 | } | |
1780 | ||
1781 | static int | |
3ae5eaec | 1782 | sl811h_resume(struct platform_device *dev) |
1da177e4 | 1783 | { |
3ae5eaec | 1784 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
1785 | struct sl811 *sl811 = hcd_to_sl811(hcd); |
1786 | ||
1da177e4 LT |
1787 | /* with no "check to see if VBUS is still powered" board hook, |
1788 | * let's assume it'd only be powered to enable remote wakeup. | |
1789 | */ | |
70a1c9e0 | 1790 | if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) { |
1da177e4 LT |
1791 | sl811->port1 = 0; |
1792 | port_power(sl811, 1); | |
1c50c317 | 1793 | usb_root_hub_lost_power(hcd->self.root_hub); |
1da177e4 LT |
1794 | return 0; |
1795 | } | |
1796 | ||
0c0382e3 | 1797 | return sl811h_bus_resume(hcd); |
1da177e4 LT |
1798 | } |
1799 | ||
1800 | #else | |
1801 | ||
1802 | #define sl811h_suspend NULL | |
1803 | #define sl811h_resume NULL | |
1804 | ||
1805 | #endif | |
1806 | ||
1807 | ||
1e9a47b6 | 1808 | /* this driver is exported so sl811_cs can depend on it */ |
3ae5eaec | 1809 | struct platform_driver sl811h_driver = { |
1da177e4 | 1810 | .probe = sl811h_probe, |
1e9a47b6 | 1811 | .remove = __devexit_p(sl811h_remove), |
1da177e4 LT |
1812 | |
1813 | .suspend = sl811h_suspend, | |
1814 | .resume = sl811h_resume, | |
3ae5eaec RK |
1815 | .driver = { |
1816 | .name = (char *) hcd_name, | |
1817 | .owner = THIS_MODULE, | |
1818 | }, | |
1da177e4 | 1819 | }; |
1e9a47b6 | 1820 | EXPORT_SYMBOL(sl811h_driver); |
1da177e4 | 1821 | |
6ef1a927 | 1822 | module_platform_driver(sl811h_driver); |