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7359d482 PZ |
1 | /* |
2 | * hcd.c - DesignWare HS OTG Controller host-mode routines | |
3 | * | |
4 | * Copyright (C) 2004-2013 Synopsys, Inc. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions, and the following disclaimer, | |
11 | * without modification. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * 3. The names of the above-listed copyright holders may not be used | |
16 | * to endorse or promote products derived from this software without | |
17 | * specific prior written permission. | |
18 | * | |
19 | * ALTERNATIVELY, this software may be distributed under the terms of the | |
20 | * GNU General Public License ("GPL") as published by the Free Software | |
21 | * Foundation; either version 2 of the License, or (at your option) any | |
22 | * later version. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
25 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
26 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
28 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
29 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
30 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
31 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | /* | |
38 | * This file contains the core HCD code, and implements the Linux hc_driver | |
39 | * API | |
40 | */ | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/dma-mapping.h> | |
46 | #include <linux/delay.h> | |
47 | #include <linux/io.h> | |
48 | #include <linux/slab.h> | |
49 | #include <linux/usb.h> | |
50 | ||
51 | #include <linux/usb/hcd.h> | |
52 | #include <linux/usb/ch11.h> | |
53 | ||
54 | #include "core.h" | |
55 | #include "hcd.h" | |
56 | ||
57 | /** | |
58 | * dwc2_dump_channel_info() - Prints the state of a host channel | |
59 | * | |
60 | * @hsotg: Programming view of DWC_otg controller | |
61 | * @chan: Pointer to the channel to dump | |
62 | * | |
63 | * Must be called with interrupt disabled and spinlock held | |
64 | * | |
65 | * NOTE: This function will be removed once the peripheral controller code | |
66 | * is integrated and the driver is stable | |
67 | */ | |
68 | static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg, | |
69 | struct dwc2_host_chan *chan) | |
70 | { | |
71 | #ifdef VERBOSE_DEBUG | |
72 | int num_channels = hsotg->core_params->host_channels; | |
73 | struct dwc2_qh *qh; | |
74 | u32 hcchar; | |
75 | u32 hcsplt; | |
76 | u32 hctsiz; | |
77 | u32 hc_dma; | |
78 | int i; | |
79 | ||
80 | if (chan == NULL) | |
81 | return; | |
82 | ||
83 | hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
84 | hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num)); | |
85 | hctsiz = readl(hsotg->regs + HCTSIZ(chan->hc_num)); | |
86 | hc_dma = readl(hsotg->regs + HCDMA(chan->hc_num)); | |
87 | ||
88 | dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan); | |
89 | dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", | |
90 | hcchar, hcsplt); | |
91 | dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", | |
92 | hctsiz, hc_dma); | |
93 | dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", | |
94 | chan->dev_addr, chan->ep_num, chan->ep_is_in); | |
95 | dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); | |
96 | dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet); | |
97 | dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start); | |
98 | dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started); | |
99 | dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); | |
100 | dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); | |
101 | dev_dbg(hsotg->dev, " xfer_dma: %08lx\n", | |
102 | (unsigned long)chan->xfer_dma); | |
103 | dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); | |
104 | dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); | |
105 | dev_dbg(hsotg->dev, " NP inactive sched:\n"); | |
106 | list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive, | |
107 | qh_list_entry) | |
108 | dev_dbg(hsotg->dev, " %p\n", qh); | |
109 | dev_dbg(hsotg->dev, " NP active sched:\n"); | |
110 | list_for_each_entry(qh, &hsotg->non_periodic_sched_active, | |
111 | qh_list_entry) | |
112 | dev_dbg(hsotg->dev, " %p\n", qh); | |
113 | dev_dbg(hsotg->dev, " Channels:\n"); | |
114 | for (i = 0; i < num_channels; i++) { | |
115 | struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i]; | |
116 | ||
117 | dev_dbg(hsotg->dev, " %2d: %p\n", i, chan); | |
118 | } | |
119 | #endif /* VERBOSE_DEBUG */ | |
120 | } | |
121 | ||
122 | /* | |
123 | * Processes all the URBs in a single list of QHs. Completes them with | |
124 | * -ETIMEDOUT and frees the QTD. | |
125 | * | |
126 | * Must be called with interrupt disabled and spinlock held | |
127 | */ | |
128 | static void dwc2_kill_urbs_in_qh_list(struct dwc2_hsotg *hsotg, | |
129 | struct list_head *qh_list) | |
130 | { | |
131 | struct dwc2_qh *qh, *qh_tmp; | |
132 | struct dwc2_qtd *qtd, *qtd_tmp; | |
133 | ||
134 | list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) { | |
135 | list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, | |
136 | qtd_list_entry) { | |
137 | if (qtd->urb != NULL) { | |
138 | dwc2_host_complete(hsotg, qtd->urb->priv, | |
139 | qtd->urb, -ETIMEDOUT); | |
140 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); | |
141 | } | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
146 | static void dwc2_qh_list_free(struct dwc2_hsotg *hsotg, | |
147 | struct list_head *qh_list) | |
148 | { | |
149 | struct dwc2_qtd *qtd, *qtd_tmp; | |
150 | struct dwc2_qh *qh, *qh_tmp; | |
151 | unsigned long flags; | |
152 | ||
153 | if (!qh_list->next) | |
154 | /* The list hasn't been initialized yet */ | |
155 | return; | |
156 | ||
157 | spin_lock_irqsave(&hsotg->lock, flags); | |
158 | ||
159 | /* Ensure there are no QTDs or URBs left */ | |
160 | dwc2_kill_urbs_in_qh_list(hsotg, qh_list); | |
161 | ||
162 | list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) { | |
163 | dwc2_hcd_qh_unlink(hsotg, qh); | |
164 | ||
165 | /* Free each QTD in the QH's QTD list */ | |
166 | list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, | |
167 | qtd_list_entry) | |
168 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); | |
169 | ||
170 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
171 | dwc2_hcd_qh_free(hsotg, qh); | |
172 | spin_lock_irqsave(&hsotg->lock, flags); | |
173 | } | |
174 | ||
175 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
176 | } | |
177 | ||
178 | /* | |
179 | * Responds with an error status of -ETIMEDOUT to all URBs in the non-periodic | |
180 | * and periodic schedules. The QTD associated with each URB is removed from | |
181 | * the schedule and freed. This function may be called when a disconnect is | |
182 | * detected or when the HCD is being stopped. | |
183 | * | |
184 | * Must be called with interrupt disabled and spinlock held | |
185 | */ | |
186 | static void dwc2_kill_all_urbs(struct dwc2_hsotg *hsotg) | |
187 | { | |
188 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_inactive); | |
189 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_active); | |
190 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_inactive); | |
191 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_ready); | |
192 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_assigned); | |
193 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_queued); | |
194 | } | |
195 | ||
196 | /** | |
197 | * dwc2_hcd_start() - Starts the HCD when switching to Host mode | |
198 | * | |
199 | * @hsotg: Pointer to struct dwc2_hsotg | |
200 | */ | |
201 | void dwc2_hcd_start(struct dwc2_hsotg *hsotg) | |
202 | { | |
203 | u32 hprt0; | |
204 | ||
205 | if (hsotg->op_state == OTG_STATE_B_HOST) { | |
206 | /* | |
207 | * Reset the port. During a HNP mode switch the reset | |
208 | * needs to occur within 1ms and have a duration of at | |
209 | * least 50ms. | |
210 | */ | |
211 | hprt0 = dwc2_read_hprt0(hsotg); | |
212 | hprt0 |= HPRT0_RST; | |
213 | writel(hprt0, hsotg->regs + HPRT0); | |
214 | } | |
215 | ||
216 | queue_delayed_work(hsotg->wq_otg, &hsotg->start_work, | |
217 | msecs_to_jiffies(50)); | |
218 | } | |
219 | ||
220 | /* Must be called with interrupt disabled and spinlock held */ | |
221 | static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg) | |
222 | { | |
223 | int num_channels = hsotg->core_params->host_channels; | |
224 | struct dwc2_host_chan *channel; | |
225 | u32 hcchar; | |
226 | int i; | |
227 | ||
228 | if (hsotg->core_params->dma_enable <= 0) { | |
229 | /* Flush out any channel requests in slave mode */ | |
230 | for (i = 0; i < num_channels; i++) { | |
231 | channel = hsotg->hc_ptr_array[i]; | |
232 | if (!list_empty(&channel->hc_list_entry)) | |
233 | continue; | |
234 | hcchar = readl(hsotg->regs + HCCHAR(i)); | |
235 | if (hcchar & HCCHAR_CHENA) { | |
236 | hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR); | |
237 | hcchar |= HCCHAR_CHDIS; | |
238 | writel(hcchar, hsotg->regs + HCCHAR(i)); | |
239 | } | |
240 | } | |
241 | } | |
242 | ||
243 | for (i = 0; i < num_channels; i++) { | |
244 | channel = hsotg->hc_ptr_array[i]; | |
245 | if (!list_empty(&channel->hc_list_entry)) | |
246 | continue; | |
247 | hcchar = readl(hsotg->regs + HCCHAR(i)); | |
248 | if (hcchar & HCCHAR_CHENA) { | |
249 | /* Halt the channel */ | |
250 | hcchar |= HCCHAR_CHDIS; | |
251 | writel(hcchar, hsotg->regs + HCCHAR(i)); | |
252 | } | |
253 | ||
254 | dwc2_hc_cleanup(hsotg, channel); | |
255 | list_add_tail(&channel->hc_list_entry, &hsotg->free_hc_list); | |
256 | /* | |
257 | * Added for Descriptor DMA to prevent channel double cleanup in | |
258 | * release_channel_ddma(), which is called from ep_disable when | |
259 | * device disconnects | |
260 | */ | |
261 | channel->qh = NULL; | |
262 | } | |
263 | } | |
264 | ||
265 | /** | |
266 | * dwc2_hcd_disconnect() - Handles disconnect of the HCD | |
267 | * | |
268 | * @hsotg: Pointer to struct dwc2_hsotg | |
269 | * | |
270 | * Must be called with interrupt disabled and spinlock held | |
271 | */ | |
272 | void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg) | |
273 | { | |
274 | u32 intr; | |
275 | ||
276 | /* Set status flags for the hub driver */ | |
277 | hsotg->flags.b.port_connect_status_change = 1; | |
278 | hsotg->flags.b.port_connect_status = 0; | |
279 | ||
280 | /* | |
281 | * Shutdown any transfers in process by clearing the Tx FIFO Empty | |
282 | * interrupt mask and status bits and disabling subsequent host | |
283 | * channel interrupts. | |
284 | */ | |
285 | intr = readl(hsotg->regs + GINTMSK); | |
286 | intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT); | |
287 | writel(intr, hsotg->regs + GINTMSK); | |
288 | intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT; | |
289 | writel(intr, hsotg->regs + GINTSTS); | |
290 | ||
291 | /* | |
292 | * Turn off the vbus power only if the core has transitioned to device | |
293 | * mode. If still in host mode, need to keep power on to detect a | |
294 | * reconnection. | |
295 | */ | |
296 | if (dwc2_is_device_mode(hsotg)) { | |
297 | if (hsotg->op_state != OTG_STATE_A_SUSPEND) { | |
298 | dev_dbg(hsotg->dev, "Disconnect: PortPower off\n"); | |
299 | writel(0, hsotg->regs + HPRT0); | |
300 | } | |
301 | ||
302 | dwc2_disable_host_interrupts(hsotg); | |
303 | } | |
304 | ||
305 | /* Respond with an error status to all URBs in the schedule */ | |
306 | dwc2_kill_all_urbs(hsotg); | |
307 | ||
308 | if (dwc2_is_host_mode(hsotg)) | |
309 | /* Clean up any host channels that were in use */ | |
310 | dwc2_hcd_cleanup_channels(hsotg); | |
311 | ||
312 | dwc2_host_disconnect(hsotg); | |
313 | } | |
314 | ||
315 | /** | |
316 | * dwc2_hcd_rem_wakeup() - Handles Remote Wakeup | |
317 | * | |
318 | * @hsotg: Pointer to struct dwc2_hsotg | |
319 | */ | |
320 | static void dwc2_hcd_rem_wakeup(struct dwc2_hsotg *hsotg) | |
321 | { | |
322 | if (hsotg->lx_state == DWC2_L2) | |
323 | hsotg->flags.b.port_suspend_change = 1; | |
324 | else | |
325 | hsotg->flags.b.port_l1_change = 1; | |
326 | } | |
327 | ||
328 | /** | |
329 | * dwc2_hcd_stop() - Halts the DWC_otg host mode operations in a clean manner | |
330 | * | |
331 | * @hsotg: Pointer to struct dwc2_hsotg | |
332 | * | |
333 | * Must be called with interrupt disabled and spinlock held | |
334 | */ | |
335 | void dwc2_hcd_stop(struct dwc2_hsotg *hsotg) | |
336 | { | |
337 | dev_dbg(hsotg->dev, "DWC OTG HCD STOP\n"); | |
338 | ||
339 | /* | |
340 | * The root hub should be disconnected before this function is called. | |
341 | * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue) | |
342 | * and the QH lists (via ..._hcd_endpoint_disable). | |
343 | */ | |
344 | ||
345 | /* Turn off all host-specific interrupts */ | |
346 | dwc2_disable_host_interrupts(hsotg); | |
347 | ||
348 | /* Turn off the vbus power */ | |
349 | dev_dbg(hsotg->dev, "PortPower off\n"); | |
350 | writel(0, hsotg->regs + HPRT0); | |
351 | } | |
352 | ||
353 | static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg, | |
354 | struct dwc2_hcd_urb *urb, void **ep_handle, | |
355 | gfp_t mem_flags) | |
356 | { | |
357 | struct dwc2_qtd *qtd; | |
358 | unsigned long flags; | |
359 | u32 intr_mask; | |
360 | int retval; | |
361 | ||
362 | if (!hsotg->flags.b.port_connect_status) { | |
363 | /* No longer connected */ | |
364 | dev_err(hsotg->dev, "Not connected\n"); | |
365 | return -ENODEV; | |
366 | } | |
367 | ||
368 | qtd = kzalloc(sizeof(*qtd), mem_flags); | |
369 | if (!qtd) | |
370 | return -ENOMEM; | |
371 | ||
372 | dwc2_hcd_qtd_init(qtd, urb); | |
373 | retval = dwc2_hcd_qtd_add(hsotg, qtd, (struct dwc2_qh **)ep_handle, | |
374 | mem_flags); | |
375 | if (retval < 0) { | |
376 | dev_err(hsotg->dev, | |
377 | "DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n", | |
378 | retval); | |
379 | kfree(qtd); | |
380 | return retval; | |
381 | } | |
382 | ||
383 | intr_mask = readl(hsotg->regs + GINTMSK); | |
384 | if (!(intr_mask & GINTSTS_SOF) && retval == 0) { | |
385 | enum dwc2_transaction_type tr_type; | |
386 | ||
387 | if (qtd->qh->ep_type == USB_ENDPOINT_XFER_BULK && | |
388 | !(qtd->urb->flags & URB_GIVEBACK_ASAP)) | |
389 | /* | |
390 | * Do not schedule SG transactions until qtd has | |
391 | * URB_GIVEBACK_ASAP set | |
392 | */ | |
393 | return 0; | |
394 | ||
395 | spin_lock_irqsave(&hsotg->lock, flags); | |
396 | tr_type = dwc2_hcd_select_transactions(hsotg); | |
397 | if (tr_type != DWC2_TRANSACTION_NONE) | |
398 | dwc2_hcd_queue_transactions(hsotg, tr_type); | |
399 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
400 | } | |
401 | ||
402 | return retval; | |
403 | } | |
404 | ||
405 | /* Must be called with interrupt disabled and spinlock held */ | |
406 | static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg, | |
407 | struct dwc2_hcd_urb *urb) | |
408 | { | |
409 | struct dwc2_qh *qh; | |
410 | struct dwc2_qtd *urb_qtd; | |
411 | ||
412 | urb_qtd = urb->qtd; | |
413 | if (!urb_qtd) { | |
414 | dev_dbg(hsotg->dev, "## Urb QTD is NULL ##\n"); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | qh = urb_qtd->qh; | |
419 | if (!qh) { | |
420 | dev_dbg(hsotg->dev, "## Urb QTD QH is NULL ##\n"); | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | if (urb_qtd->in_process && qh->channel) { | |
425 | dwc2_dump_channel_info(hsotg, qh->channel); | |
426 | ||
427 | /* The QTD is in process (it has been assigned to a channel) */ | |
428 | if (hsotg->flags.b.port_connect_status) | |
429 | /* | |
430 | * If still connected (i.e. in host mode), halt the | |
431 | * channel so it can be used for other transfers. If | |
432 | * no longer connected, the host registers can't be | |
433 | * written to halt the channel since the core is in | |
434 | * device mode. | |
435 | */ | |
436 | dwc2_hc_halt(hsotg, qh->channel, | |
437 | DWC2_HC_XFER_URB_DEQUEUE); | |
438 | } | |
439 | ||
440 | /* | |
441 | * Free the QTD and clean up the associated QH. Leave the QH in the | |
442 | * schedule if it has any remaining QTDs. | |
443 | */ | |
444 | if (hsotg->core_params->dma_desc_enable <= 0) { | |
445 | u8 in_process = urb_qtd->in_process; | |
446 | ||
447 | dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); | |
448 | if (in_process) { | |
449 | dwc2_hcd_qh_deactivate(hsotg, qh, 0); | |
450 | qh->channel = NULL; | |
451 | } else if (list_empty(&qh->qtd_list)) { | |
452 | dwc2_hcd_qh_unlink(hsotg, qh); | |
453 | } | |
454 | } else { | |
455 | dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); | |
456 | } | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | /* Must NOT be called with interrupt disabled or spinlock held */ | |
462 | static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg, | |
463 | struct usb_host_endpoint *ep, int retry) | |
464 | { | |
465 | struct dwc2_qtd *qtd, *qtd_tmp; | |
466 | struct dwc2_qh *qh; | |
467 | unsigned long flags; | |
468 | int rc; | |
469 | ||
470 | spin_lock_irqsave(&hsotg->lock, flags); | |
471 | ||
472 | qh = ep->hcpriv; | |
473 | if (!qh) { | |
474 | rc = -EINVAL; | |
475 | goto err; | |
476 | } | |
477 | ||
478 | while (!list_empty(&qh->qtd_list) && retry--) { | |
479 | if (retry == 0) { | |
480 | dev_err(hsotg->dev, | |
481 | "## timeout in dwc2_hcd_endpoint_disable() ##\n"); | |
482 | rc = -EBUSY; | |
483 | goto err; | |
484 | } | |
485 | ||
486 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
487 | usleep_range(20000, 40000); | |
488 | spin_lock_irqsave(&hsotg->lock, flags); | |
489 | qh = ep->hcpriv; | |
490 | if (!qh) { | |
491 | rc = -EINVAL; | |
492 | goto err; | |
493 | } | |
494 | } | |
495 | ||
496 | dwc2_hcd_qh_unlink(hsotg, qh); | |
497 | ||
498 | /* Free each QTD in the QH's QTD list */ | |
499 | list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) | |
500 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); | |
501 | ||
502 | ep->hcpriv = NULL; | |
503 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
504 | dwc2_hcd_qh_free(hsotg, qh); | |
505 | ||
506 | return 0; | |
507 | ||
508 | err: | |
509 | ep->hcpriv = NULL; | |
510 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
511 | ||
512 | return rc; | |
513 | } | |
514 | ||
515 | /* Must be called with interrupt disabled and spinlock held */ | |
516 | static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg, | |
517 | struct usb_host_endpoint *ep) | |
518 | { | |
519 | struct dwc2_qh *qh = ep->hcpriv; | |
520 | ||
521 | if (!qh) | |
522 | return -EINVAL; | |
523 | ||
524 | qh->data_toggle = DWC2_HC_PID_DATA0; | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | /* | |
530 | * Initializes dynamic portions of the DWC_otg HCD state | |
531 | * | |
532 | * Must be called with interrupt disabled and spinlock held | |
533 | */ | |
534 | static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg) | |
535 | { | |
536 | struct dwc2_host_chan *chan, *chan_tmp; | |
537 | int num_channels; | |
538 | int i; | |
539 | ||
540 | hsotg->flags.d32 = 0; | |
541 | ||
542 | hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active; | |
543 | hsotg->non_periodic_channels = 0; | |
544 | hsotg->periodic_channels = 0; | |
545 | ||
546 | /* | |
547 | * Put all channels in the free channel list and clean up channel | |
548 | * states | |
549 | */ | |
550 | list_for_each_entry_safe(chan, chan_tmp, &hsotg->free_hc_list, | |
551 | hc_list_entry) | |
552 | list_del_init(&chan->hc_list_entry); | |
553 | ||
554 | num_channels = hsotg->core_params->host_channels; | |
555 | for (i = 0; i < num_channels; i++) { | |
556 | chan = hsotg->hc_ptr_array[i]; | |
557 | list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list); | |
558 | dwc2_hc_cleanup(hsotg, chan); | |
559 | } | |
560 | ||
561 | /* Initialize the DWC core for host mode operation */ | |
562 | dwc2_core_host_init(hsotg); | |
563 | } | |
564 | ||
565 | static void dwc2_hc_init_split(struct dwc2_hsotg *hsotg, | |
566 | struct dwc2_host_chan *chan, | |
567 | struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb) | |
568 | { | |
569 | int hub_addr, hub_port; | |
570 | ||
571 | chan->do_split = 1; | |
572 | chan->xact_pos = qtd->isoc_split_pos; | |
573 | chan->complete_split = qtd->complete_split; | |
574 | dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port); | |
575 | chan->hub_addr = (u8)hub_addr; | |
576 | chan->hub_port = (u8)hub_port; | |
577 | } | |
578 | ||
579 | static void *dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg, | |
580 | struct dwc2_host_chan *chan, | |
581 | struct dwc2_qtd *qtd, void *bufptr) | |
582 | { | |
583 | struct dwc2_hcd_urb *urb = qtd->urb; | |
584 | struct dwc2_hcd_iso_packet_desc *frame_desc; | |
585 | ||
586 | switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) { | |
587 | case USB_ENDPOINT_XFER_CONTROL: | |
588 | chan->ep_type = USB_ENDPOINT_XFER_CONTROL; | |
589 | ||
590 | switch (qtd->control_phase) { | |
591 | case DWC2_CONTROL_SETUP: | |
592 | dev_vdbg(hsotg->dev, " Control setup transaction\n"); | |
593 | chan->do_ping = 0; | |
594 | chan->ep_is_in = 0; | |
595 | chan->data_pid_start = DWC2_HC_PID_SETUP; | |
596 | if (hsotg->core_params->dma_enable > 0) | |
597 | chan->xfer_dma = urb->setup_dma; | |
598 | else | |
599 | chan->xfer_buf = urb->setup_packet; | |
600 | chan->xfer_len = 8; | |
601 | bufptr = NULL; | |
602 | break; | |
603 | ||
604 | case DWC2_CONTROL_DATA: | |
605 | dev_vdbg(hsotg->dev, " Control data transaction\n"); | |
606 | chan->data_pid_start = qtd->data_toggle; | |
607 | break; | |
608 | ||
609 | case DWC2_CONTROL_STATUS: | |
610 | /* | |
611 | * Direction is opposite of data direction or IN if no | |
612 | * data | |
613 | */ | |
614 | dev_vdbg(hsotg->dev, " Control status transaction\n"); | |
615 | if (urb->length == 0) | |
616 | chan->ep_is_in = 1; | |
617 | else | |
618 | chan->ep_is_in = | |
619 | dwc2_hcd_is_pipe_out(&urb->pipe_info); | |
620 | if (chan->ep_is_in) | |
621 | chan->do_ping = 0; | |
622 | chan->data_pid_start = DWC2_HC_PID_DATA1; | |
623 | chan->xfer_len = 0; | |
624 | if (hsotg->core_params->dma_enable > 0) | |
625 | chan->xfer_dma = hsotg->status_buf_dma; | |
626 | else | |
627 | chan->xfer_buf = hsotg->status_buf; | |
628 | bufptr = NULL; | |
629 | break; | |
630 | } | |
631 | break; | |
632 | ||
633 | case USB_ENDPOINT_XFER_BULK: | |
634 | chan->ep_type = USB_ENDPOINT_XFER_BULK; | |
635 | break; | |
636 | ||
637 | case USB_ENDPOINT_XFER_INT: | |
638 | chan->ep_type = USB_ENDPOINT_XFER_INT; | |
639 | break; | |
640 | ||
641 | case USB_ENDPOINT_XFER_ISOC: | |
642 | chan->ep_type = USB_ENDPOINT_XFER_ISOC; | |
643 | if (hsotg->core_params->dma_desc_enable > 0) | |
644 | break; | |
645 | ||
646 | frame_desc = &urb->iso_descs[qtd->isoc_frame_index]; | |
647 | frame_desc->status = 0; | |
648 | ||
649 | if (hsotg->core_params->dma_enable > 0) { | |
650 | chan->xfer_dma = urb->dma; | |
651 | chan->xfer_dma += frame_desc->offset + | |
652 | qtd->isoc_split_offset; | |
653 | } else { | |
654 | chan->xfer_buf = urb->buf; | |
655 | chan->xfer_buf += frame_desc->offset + | |
656 | qtd->isoc_split_offset; | |
657 | } | |
658 | ||
659 | chan->xfer_len = frame_desc->length - qtd->isoc_split_offset; | |
660 | ||
661 | /* For non-dword aligned buffers */ | |
662 | if (hsotg->core_params->dma_enable > 0 && | |
663 | (chan->xfer_dma & 0x3)) | |
664 | bufptr = (u8 *)urb->buf + frame_desc->offset + | |
665 | qtd->isoc_split_offset; | |
666 | else | |
667 | bufptr = NULL; | |
668 | ||
669 | if (chan->xact_pos == DWC2_HCSPLT_XACTPOS_ALL) { | |
670 | if (chan->xfer_len <= 188) | |
671 | chan->xact_pos = DWC2_HCSPLT_XACTPOS_ALL; | |
672 | else | |
673 | chan->xact_pos = DWC2_HCSPLT_XACTPOS_BEGIN; | |
674 | } | |
675 | break; | |
676 | } | |
677 | ||
678 | return bufptr; | |
679 | } | |
680 | ||
681 | static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, | |
682 | struct dwc2_host_chan *chan, void *bufptr) | |
683 | { | |
684 | u32 buf_size; | |
685 | ||
686 | if (chan->ep_type != USB_ENDPOINT_XFER_ISOC) | |
687 | buf_size = hsotg->core_params->max_transfer_size; | |
688 | else | |
689 | buf_size = 4096; | |
690 | ||
691 | if (!qh->dw_align_buf) { | |
692 | qh->dw_align_buf = dma_alloc_coherent(hsotg->dev, buf_size, | |
693 | &qh->dw_align_buf_dma, | |
694 | GFP_ATOMIC); | |
695 | if (!qh->dw_align_buf) | |
696 | return -ENOMEM; | |
697 | } | |
698 | ||
699 | if (!chan->ep_is_in && chan->xfer_len) { | |
700 | dma_sync_single_for_cpu(hsotg->dev, chan->xfer_dma, buf_size, | |
701 | DMA_TO_DEVICE); | |
702 | memcpy(qh->dw_align_buf, bufptr, chan->xfer_len); | |
703 | dma_sync_single_for_device(hsotg->dev, chan->xfer_dma, buf_size, | |
704 | DMA_TO_DEVICE); | |
705 | } | |
706 | ||
707 | chan->align_buf = qh->dw_align_buf_dma; | |
708 | return 0; | |
709 | } | |
710 | ||
711 | /** | |
712 | * dwc2_assign_and_init_hc() - Assigns transactions from a QTD to a free host | |
713 | * channel and initializes the host channel to perform the transactions. The | |
714 | * host channel is removed from the free list. | |
715 | * | |
716 | * @hsotg: The HCD state structure | |
717 | * @qh: Transactions from the first QTD for this QH are selected and assigned | |
718 | * to a free host channel | |
719 | */ | |
720 | static void dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, | |
721 | struct dwc2_qh *qh) | |
722 | { | |
723 | struct dwc2_host_chan *chan; | |
724 | struct dwc2_hcd_urb *urb; | |
725 | struct dwc2_qtd *qtd; | |
726 | void *bufptr = NULL; | |
727 | ||
728 | dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh); | |
729 | ||
730 | if (list_empty(&qh->qtd_list)) { | |
731 | dev_dbg(hsotg->dev, "No QTDs in QH list\n"); | |
732 | return; | |
733 | } | |
734 | ||
735 | if (list_empty(&hsotg->free_hc_list)) { | |
736 | dev_dbg(hsotg->dev, "No free channel to assign\n"); | |
737 | return; | |
738 | } | |
739 | ||
740 | chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan, | |
741 | hc_list_entry); | |
742 | ||
743 | /* Remove the host channel from the free list */ | |
744 | list_del_init(&chan->hc_list_entry); | |
745 | ||
746 | qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry); | |
747 | urb = qtd->urb; | |
748 | qh->channel = chan; | |
749 | qtd->in_process = 1; | |
750 | ||
751 | /* | |
752 | * Use usb_pipedevice to determine device address. This address is | |
753 | * 0 before the SET_ADDRESS command and the correct address afterward. | |
754 | */ | |
755 | chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info); | |
756 | chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info); | |
757 | chan->speed = qh->dev_speed; | |
758 | chan->max_packet = dwc2_max_packet(qh->maxp); | |
759 | ||
760 | chan->xfer_started = 0; | |
761 | chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS; | |
762 | chan->error_state = (qtd->error_count > 0); | |
763 | chan->halt_on_queue = 0; | |
764 | chan->halt_pending = 0; | |
765 | chan->requests = 0; | |
766 | ||
767 | /* | |
768 | * The following values may be modified in the transfer type section | |
769 | * below. The xfer_len value may be reduced when the transfer is | |
770 | * started to accommodate the max widths of the XferSize and PktCnt | |
771 | * fields in the HCTSIZn register. | |
772 | */ | |
773 | ||
774 | chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0); | |
775 | if (chan->ep_is_in) | |
776 | chan->do_ping = 0; | |
777 | else | |
778 | chan->do_ping = qh->ping_state; | |
779 | ||
780 | chan->data_pid_start = qh->data_toggle; | |
781 | chan->multi_count = 1; | |
782 | ||
783 | if (hsotg->core_params->dma_enable > 0) { | |
784 | chan->xfer_dma = urb->dma + urb->actual_length; | |
785 | ||
786 | /* For non-dword aligned case */ | |
787 | if (hsotg->core_params->dma_desc_enable <= 0 && | |
788 | (chan->xfer_dma & 0x3)) | |
789 | bufptr = (u8 *)urb->buf + urb->actual_length; | |
790 | } else { | |
791 | chan->xfer_buf = (u8 *)urb->buf + urb->actual_length; | |
792 | } | |
793 | ||
794 | chan->xfer_len = urb->length - urb->actual_length; | |
795 | chan->xfer_count = 0; | |
796 | ||
797 | /* Set the split attributes if required */ | |
798 | if (qh->do_split) | |
799 | dwc2_hc_init_split(hsotg, chan, qtd, urb); | |
800 | else | |
801 | chan->do_split = 0; | |
802 | ||
803 | /* Set the transfer attributes */ | |
804 | bufptr = dwc2_hc_init_xfer(hsotg, chan, qtd, bufptr); | |
805 | ||
806 | /* Non DWORD-aligned buffer case */ | |
807 | if (bufptr) { | |
808 | dev_vdbg(hsotg->dev, "Non-aligned buffer\n"); | |
809 | if (dwc2_hc_setup_align_buf(hsotg, qh, chan, bufptr)) { | |
810 | dev_err(hsotg->dev, | |
811 | "%s: Failed to allocate memory to handle non-dword aligned buffer\n", | |
812 | __func__); | |
813 | /* Add channel back to free list */ | |
814 | chan->align_buf = 0; | |
815 | chan->multi_count = 0; | |
816 | list_add_tail(&chan->hc_list_entry, | |
817 | &hsotg->free_hc_list); | |
818 | qtd->in_process = 0; | |
819 | qh->channel = NULL; | |
820 | return; | |
821 | } | |
822 | } else { | |
823 | chan->align_buf = 0; | |
824 | } | |
825 | ||
826 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
827 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
828 | /* | |
829 | * This value may be modified when the transfer is started | |
830 | * to reflect the actual transfer length | |
831 | */ | |
832 | chan->multi_count = dwc2_hb_mult(qh->maxp); | |
833 | ||
834 | if (hsotg->core_params->dma_desc_enable > 0) | |
835 | chan->desc_list_addr = qh->desc_list_dma; | |
836 | ||
837 | dwc2_hc_init(hsotg, chan); | |
838 | chan->qh = qh; | |
839 | } | |
840 | ||
841 | /** | |
842 | * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer | |
843 | * schedule and assigns them to available host channels. Called from the HCD | |
844 | * interrupt handler functions. | |
845 | * | |
846 | * @hsotg: The HCD state structure | |
847 | * | |
848 | * Return: The types of new transactions that were assigned to host channels | |
849 | */ | |
850 | enum dwc2_transaction_type dwc2_hcd_select_transactions( | |
851 | struct dwc2_hsotg *hsotg) | |
852 | { | |
853 | enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE; | |
854 | struct list_head *qh_ptr; | |
855 | struct dwc2_qh *qh; | |
856 | int num_channels; | |
857 | ||
858 | #ifdef DWC2_DEBUG_SOF | |
859 | dev_vdbg(hsotg->dev, " Select Transactions\n"); | |
860 | #endif | |
861 | ||
862 | /* Process entries in the periodic ready list */ | |
863 | qh_ptr = hsotg->periodic_sched_ready.next; | |
864 | while (qh_ptr != &hsotg->periodic_sched_ready) { | |
865 | if (list_empty(&hsotg->free_hc_list)) | |
866 | break; | |
867 | qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); | |
868 | dwc2_assign_and_init_hc(hsotg, qh); | |
869 | ||
870 | /* | |
871 | * Move the QH from the periodic ready schedule to the | |
872 | * periodic assigned schedule | |
873 | */ | |
874 | qh_ptr = qh_ptr->next; | |
875 | list_move(&qh->qh_list_entry, &hsotg->periodic_sched_assigned); | |
876 | ret_val = DWC2_TRANSACTION_PERIODIC; | |
877 | } | |
878 | ||
879 | /* | |
880 | * Process entries in the inactive portion of the non-periodic | |
881 | * schedule. Some free host channels may not be used if they are | |
882 | * reserved for periodic transfers. | |
883 | */ | |
884 | num_channels = hsotg->core_params->host_channels; | |
885 | qh_ptr = hsotg->non_periodic_sched_inactive.next; | |
886 | while (qh_ptr != &hsotg->non_periodic_sched_inactive) { | |
887 | if (hsotg->non_periodic_channels >= num_channels - | |
888 | hsotg->periodic_channels) | |
889 | break; | |
890 | if (list_empty(&hsotg->free_hc_list)) | |
891 | break; | |
892 | qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); | |
893 | dwc2_assign_and_init_hc(hsotg, qh); | |
894 | ||
895 | /* | |
896 | * Move the QH from the non-periodic inactive schedule to the | |
897 | * non-periodic active schedule | |
898 | */ | |
899 | qh_ptr = qh_ptr->next; | |
900 | list_move(&qh->qh_list_entry, | |
901 | &hsotg->non_periodic_sched_active); | |
902 | ||
903 | if (ret_val == DWC2_TRANSACTION_NONE) | |
904 | ret_val = DWC2_TRANSACTION_NON_PERIODIC; | |
905 | else | |
906 | ret_val = DWC2_TRANSACTION_ALL; | |
907 | ||
908 | hsotg->non_periodic_channels++; | |
909 | } | |
910 | ||
911 | return ret_val; | |
912 | } | |
913 | ||
914 | /** | |
915 | * dwc2_queue_transaction() - Attempts to queue a single transaction request for | |
916 | * a host channel associated with either a periodic or non-periodic transfer | |
917 | * | |
918 | * @hsotg: The HCD state structure | |
919 | * @chan: Host channel descriptor associated with either a periodic or | |
920 | * non-periodic transfer | |
921 | * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO | |
922 | * for periodic transfers or the non-periodic Tx FIFO | |
923 | * for non-periodic transfers | |
924 | * | |
925 | * Return: 1 if a request is queued and more requests may be needed to | |
926 | * complete the transfer, 0 if no more requests are required for this | |
927 | * transfer, -1 if there is insufficient space in the Tx FIFO | |
928 | * | |
929 | * This function assumes that there is space available in the appropriate | |
930 | * request queue. For an OUT transfer or SETUP transaction in Slave mode, | |
931 | * it checks whether space is available in the appropriate Tx FIFO. | |
932 | * | |
933 | * Must be called with interrupt disabled and spinlock held | |
934 | */ | |
935 | static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg, | |
936 | struct dwc2_host_chan *chan, | |
937 | u16 fifo_dwords_avail) | |
938 | { | |
939 | int retval = 0; | |
940 | ||
941 | if (hsotg->core_params->dma_enable > 0) { | |
942 | if (hsotg->core_params->dma_desc_enable > 0) { | |
943 | if (!chan->xfer_started || | |
944 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
945 | dwc2_hcd_start_xfer_ddma(hsotg, chan->qh); | |
946 | chan->qh->ping_state = 0; | |
947 | } | |
948 | } else if (!chan->xfer_started) { | |
949 | dwc2_hc_start_transfer(hsotg, chan); | |
950 | chan->qh->ping_state = 0; | |
951 | } | |
952 | } else if (chan->halt_pending) { | |
953 | /* Don't queue a request if the channel has been halted */ | |
954 | } else if (chan->halt_on_queue) { | |
955 | dwc2_hc_halt(hsotg, chan, chan->halt_status); | |
956 | } else if (chan->do_ping) { | |
957 | if (!chan->xfer_started) | |
958 | dwc2_hc_start_transfer(hsotg, chan); | |
959 | } else if (!chan->ep_is_in || | |
960 | chan->data_pid_start == DWC2_HC_PID_SETUP) { | |
961 | if ((fifo_dwords_avail * 4) >= chan->max_packet) { | |
962 | if (!chan->xfer_started) { | |
963 | dwc2_hc_start_transfer(hsotg, chan); | |
964 | retval = 1; | |
965 | } else { | |
966 | retval = dwc2_hc_continue_transfer(hsotg, chan); | |
967 | } | |
968 | } else { | |
969 | retval = -1; | |
970 | } | |
971 | } else { | |
972 | if (!chan->xfer_started) { | |
973 | dwc2_hc_start_transfer(hsotg, chan); | |
974 | retval = 1; | |
975 | } else { | |
976 | retval = dwc2_hc_continue_transfer(hsotg, chan); | |
977 | } | |
978 | } | |
979 | ||
980 | return retval; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Processes periodic channels for the next frame and queues transactions for | |
985 | * these channels to the DWC_otg controller. After queueing transactions, the | |
986 | * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions | |
987 | * to queue as Periodic Tx FIFO or request queue space becomes available. | |
988 | * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled. | |
989 | * | |
990 | * Must be called with interrupt disabled and spinlock held | |
991 | */ | |
992 | static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg) | |
993 | { | |
994 | struct list_head *qh_ptr; | |
995 | struct dwc2_qh *qh; | |
996 | u32 tx_status; | |
997 | u32 fspcavail; | |
998 | u32 gintmsk; | |
999 | int status; | |
1000 | int no_queue_space = 0; | |
1001 | int no_fifo_space = 0; | |
1002 | u32 qspcavail; | |
1003 | ||
1004 | dev_vdbg(hsotg->dev, "Queue periodic transactions\n"); | |
1005 | ||
1006 | tx_status = readl(hsotg->regs + HPTXSTS); | |
1007 | qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1008 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT; | |
1009 | fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1010 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT; | |
1011 | dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n", | |
1012 | qspcavail); | |
1013 | dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n", | |
1014 | fspcavail); | |
1015 | ||
1016 | qh_ptr = hsotg->periodic_sched_assigned.next; | |
1017 | while (qh_ptr != &hsotg->periodic_sched_assigned) { | |
1018 | tx_status = readl(hsotg->regs + HPTXSTS); | |
1019 | if ((tx_status & TXSTS_QSPCAVAIL_MASK) == 0) { | |
1020 | no_queue_space = 1; | |
1021 | break; | |
1022 | } | |
1023 | ||
1024 | qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); | |
1025 | if (!qh->channel) { | |
1026 | qh_ptr = qh_ptr->next; | |
1027 | continue; | |
1028 | } | |
1029 | ||
1030 | /* Make sure EP's TT buffer is clean before queueing qtds */ | |
1031 | if (qh->tt_buffer_dirty) { | |
1032 | qh_ptr = qh_ptr->next; | |
1033 | continue; | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Set a flag if we're queuing high-bandwidth in slave mode. | |
1038 | * The flag prevents any halts to get into the request queue in | |
1039 | * the middle of multiple high-bandwidth packets getting queued. | |
1040 | */ | |
1041 | if (hsotg->core_params->dma_enable <= 0 && | |
1042 | qh->channel->multi_count > 1) | |
1043 | hsotg->queuing_high_bandwidth = 1; | |
1044 | ||
1045 | fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1046 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT; | |
1047 | status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail); | |
1048 | if (status < 0) { | |
1049 | no_fifo_space = 1; | |
1050 | break; | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * In Slave mode, stay on the current transfer until there is | |
1055 | * nothing more to do or the high-bandwidth request count is | |
1056 | * reached. In DMA mode, only need to queue one request. The | |
1057 | * controller automatically handles multiple packets for | |
1058 | * high-bandwidth transfers. | |
1059 | */ | |
1060 | if (hsotg->core_params->dma_enable > 0 || status == 0 || | |
1061 | qh->channel->requests == qh->channel->multi_count) { | |
1062 | qh_ptr = qh_ptr->next; | |
1063 | /* | |
1064 | * Move the QH from the periodic assigned schedule to | |
1065 | * the periodic queued schedule | |
1066 | */ | |
1067 | list_move(&qh->qh_list_entry, | |
1068 | &hsotg->periodic_sched_queued); | |
1069 | ||
1070 | /* done queuing high bandwidth */ | |
1071 | hsotg->queuing_high_bandwidth = 0; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (hsotg->core_params->dma_enable <= 0) { | |
1076 | tx_status = readl(hsotg->regs + HPTXSTS); | |
1077 | qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1078 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT; | |
1079 | fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1080 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT; | |
1081 | dev_vdbg(hsotg->dev, | |
1082 | " P Tx Req Queue Space Avail (after queue): %d\n", | |
1083 | qspcavail); | |
1084 | dev_vdbg(hsotg->dev, | |
1085 | " P Tx FIFO Space Avail (after queue): %d\n", | |
1086 | fspcavail); | |
1087 | ||
1088 | if (!list_empty(&hsotg->periodic_sched_assigned) || | |
1089 | no_queue_space || no_fifo_space) { | |
1090 | /* | |
1091 | * May need to queue more transactions as the request | |
1092 | * queue or Tx FIFO empties. Enable the periodic Tx | |
1093 | * FIFO empty interrupt. (Always use the half-empty | |
1094 | * level to ensure that new requests are loaded as | |
1095 | * soon as possible.) | |
1096 | */ | |
1097 | gintmsk = readl(hsotg->regs + GINTMSK); | |
1098 | gintmsk |= GINTSTS_PTXFEMP; | |
1099 | writel(gintmsk, hsotg->regs + GINTMSK); | |
1100 | } else { | |
1101 | /* | |
1102 | * Disable the Tx FIFO empty interrupt since there are | |
1103 | * no more transactions that need to be queued right | |
1104 | * now. This function is called from interrupt | |
1105 | * handlers to queue more transactions as transfer | |
1106 | * states change. | |
1107 | */ | |
1108 | gintmsk = readl(hsotg->regs + GINTMSK); | |
1109 | gintmsk &= ~GINTSTS_PTXFEMP; | |
1110 | writel(gintmsk, hsotg->regs + GINTMSK); | |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Processes active non-periodic channels and queues transactions for these | |
1117 | * channels to the DWC_otg controller. After queueing transactions, the NP Tx | |
1118 | * FIFO Empty interrupt is enabled if there are more transactions to queue as | |
1119 | * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx | |
1120 | * FIFO Empty interrupt is disabled. | |
1121 | * | |
1122 | * Must be called with interrupt disabled and spinlock held | |
1123 | */ | |
1124 | static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg) | |
1125 | { | |
1126 | struct list_head *orig_qh_ptr; | |
1127 | struct dwc2_qh *qh; | |
1128 | u32 tx_status; | |
1129 | u32 qspcavail; | |
1130 | u32 fspcavail; | |
1131 | u32 gintmsk; | |
1132 | int status; | |
1133 | int no_queue_space = 0; | |
1134 | int no_fifo_space = 0; | |
1135 | int more_to_do = 0; | |
1136 | ||
1137 | dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n"); | |
1138 | ||
1139 | tx_status = readl(hsotg->regs + GNPTXSTS); | |
1140 | qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1141 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT; | |
1142 | fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1143 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT; | |
1144 | dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n", | |
1145 | qspcavail); | |
1146 | dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n", | |
1147 | fspcavail); | |
1148 | ||
1149 | /* | |
1150 | * Keep track of the starting point. Skip over the start-of-list | |
1151 | * entry. | |
1152 | */ | |
1153 | if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active) | |
1154 | hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next; | |
1155 | orig_qh_ptr = hsotg->non_periodic_qh_ptr; | |
1156 | ||
1157 | /* | |
1158 | * Process once through the active list or until no more space is | |
1159 | * available in the request queue or the Tx FIFO | |
1160 | */ | |
1161 | do { | |
1162 | tx_status = readl(hsotg->regs + GNPTXSTS); | |
1163 | qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1164 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT; | |
1165 | if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) { | |
1166 | no_queue_space = 1; | |
1167 | break; | |
1168 | } | |
1169 | ||
1170 | qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh, | |
1171 | qh_list_entry); | |
1172 | if (!qh->channel) | |
1173 | goto next; | |
1174 | ||
1175 | /* Make sure EP's TT buffer is clean before queueing qtds */ | |
1176 | if (qh->tt_buffer_dirty) | |
1177 | goto next; | |
1178 | ||
1179 | fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1180 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT; | |
1181 | status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail); | |
1182 | ||
1183 | if (status > 0) { | |
1184 | more_to_do = 1; | |
1185 | } else if (status < 0) { | |
1186 | no_fifo_space = 1; | |
1187 | break; | |
1188 | } | |
1189 | next: | |
1190 | /* Advance to next QH, skipping start-of-list entry */ | |
1191 | hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next; | |
1192 | if (hsotg->non_periodic_qh_ptr == | |
1193 | &hsotg->non_periodic_sched_active) | |
1194 | hsotg->non_periodic_qh_ptr = | |
1195 | hsotg->non_periodic_qh_ptr->next; | |
1196 | } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr); | |
1197 | ||
1198 | if (hsotg->core_params->dma_enable <= 0) { | |
1199 | tx_status = readl(hsotg->regs + GNPTXSTS); | |
1200 | qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1201 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT; | |
1202 | fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1203 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT; | |
1204 | dev_vdbg(hsotg->dev, | |
1205 | " NP Tx Req Queue Space Avail (after queue): %d\n", | |
1206 | qspcavail); | |
1207 | dev_vdbg(hsotg->dev, | |
1208 | " NP Tx FIFO Space Avail (after queue): %d\n", | |
1209 | fspcavail); | |
1210 | ||
1211 | if (more_to_do || no_queue_space || no_fifo_space) { | |
1212 | /* | |
1213 | * May need to queue more transactions as the request | |
1214 | * queue or Tx FIFO empties. Enable the non-periodic | |
1215 | * Tx FIFO empty interrupt. (Always use the half-empty | |
1216 | * level to ensure that new requests are loaded as | |
1217 | * soon as possible.) | |
1218 | */ | |
1219 | gintmsk = readl(hsotg->regs + GINTMSK); | |
1220 | gintmsk |= GINTSTS_NPTXFEMP; | |
1221 | writel(gintmsk, hsotg->regs + GINTMSK); | |
1222 | } else { | |
1223 | /* | |
1224 | * Disable the Tx FIFO empty interrupt since there are | |
1225 | * no more transactions that need to be queued right | |
1226 | * now. This function is called from interrupt | |
1227 | * handlers to queue more transactions as transfer | |
1228 | * states change. | |
1229 | */ | |
1230 | gintmsk = readl(hsotg->regs + GINTMSK); | |
1231 | gintmsk &= ~GINTSTS_NPTXFEMP; | |
1232 | writel(gintmsk, hsotg->regs + GINTMSK); | |
1233 | } | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /** | |
1238 | * dwc2_hcd_queue_transactions() - Processes the currently active host channels | |
1239 | * and queues transactions for these channels to the DWC_otg controller. Called | |
1240 | * from the HCD interrupt handler functions. | |
1241 | * | |
1242 | * @hsotg: The HCD state structure | |
1243 | * @tr_type: The type(s) of transactions to queue (non-periodic, periodic, | |
1244 | * or both) | |
1245 | * | |
1246 | * Must be called with interrupt disabled and spinlock held | |
1247 | */ | |
1248 | void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg, | |
1249 | enum dwc2_transaction_type tr_type) | |
1250 | { | |
1251 | #ifdef DWC2_DEBUG_SOF | |
1252 | dev_vdbg(hsotg->dev, "Queue Transactions\n"); | |
1253 | #endif | |
1254 | /* Process host channels associated with periodic transfers */ | |
1255 | if ((tr_type == DWC2_TRANSACTION_PERIODIC || | |
1256 | tr_type == DWC2_TRANSACTION_ALL) && | |
1257 | !list_empty(&hsotg->periodic_sched_assigned)) | |
1258 | dwc2_process_periodic_channels(hsotg); | |
1259 | ||
1260 | /* Process host channels associated with non-periodic transfers */ | |
1261 | if (tr_type == DWC2_TRANSACTION_NON_PERIODIC || | |
1262 | tr_type == DWC2_TRANSACTION_ALL) { | |
1263 | if (!list_empty(&hsotg->non_periodic_sched_active)) { | |
1264 | dwc2_process_non_periodic_channels(hsotg); | |
1265 | } else { | |
1266 | /* | |
1267 | * Ensure NP Tx FIFO empty interrupt is disabled when | |
1268 | * there are no non-periodic transfers to process | |
1269 | */ | |
1270 | u32 gintmsk = readl(hsotg->regs + GINTMSK); | |
1271 | ||
1272 | gintmsk &= ~GINTSTS_NPTXFEMP; | |
1273 | writel(gintmsk, hsotg->regs + GINTMSK); | |
1274 | } | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | static void dwc2_conn_id_status_change(struct work_struct *work) | |
1279 | { | |
1280 | struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, | |
1281 | wf_otg); | |
1282 | u32 count = 0; | |
1283 | u32 gotgctl; | |
1284 | ||
1285 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
1286 | ||
1287 | gotgctl = readl(hsotg->regs + GOTGCTL); | |
1288 | dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl); | |
1289 | dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n", | |
1290 | !!(gotgctl & GOTGCTL_CONID_B)); | |
1291 | ||
1292 | /* B-Device connector (Device Mode) */ | |
1293 | if (gotgctl & GOTGCTL_CONID_B) { | |
1294 | /* Wait for switch to device mode */ | |
1295 | dev_dbg(hsotg->dev, "connId B\n"); | |
1296 | while (!dwc2_is_device_mode(hsotg)) { | |
1297 | dev_info(hsotg->dev, | |
1298 | "Waiting for Peripheral Mode, Mode=%s\n", | |
1299 | dwc2_is_host_mode(hsotg) ? "Host" : | |
1300 | "Peripheral"); | |
1301 | usleep_range(20000, 40000); | |
1302 | if (++count > 250) | |
1303 | break; | |
1304 | } | |
1305 | if (count > 250) | |
1306 | dev_err(hsotg->dev, | |
1307 | "Connection id status change timed out"); | |
1308 | hsotg->op_state = OTG_STATE_B_PERIPHERAL; | |
1309 | dwc2_core_init(hsotg, false); | |
1310 | dwc2_enable_global_interrupts(hsotg); | |
1311 | } else { | |
1312 | /* A-Device connector (Host Mode) */ | |
1313 | dev_dbg(hsotg->dev, "connId A\n"); | |
1314 | while (!dwc2_is_host_mode(hsotg)) { | |
1315 | dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n", | |
1316 | dwc2_is_host_mode(hsotg) ? | |
1317 | "Host" : "Peripheral"); | |
1318 | usleep_range(20000, 40000); | |
1319 | if (++count > 250) | |
1320 | break; | |
1321 | } | |
1322 | if (count > 250) | |
1323 | dev_err(hsotg->dev, | |
1324 | "Connection id status change timed out"); | |
1325 | hsotg->op_state = OTG_STATE_A_HOST; | |
1326 | ||
1327 | /* Initialize the Core for Host mode */ | |
1328 | dwc2_core_init(hsotg, false); | |
1329 | dwc2_enable_global_interrupts(hsotg); | |
1330 | dwc2_hcd_start(hsotg); | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | static void dwc2_wakeup_detected(unsigned long data) | |
1335 | { | |
1336 | struct dwc2_hsotg *hsotg = (struct dwc2_hsotg *)data; | |
1337 | u32 hprt0; | |
1338 | ||
1339 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
1340 | ||
1341 | /* | |
1342 | * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms | |
1343 | * so that OPT tests pass with all PHYs.) | |
1344 | */ | |
1345 | hprt0 = dwc2_read_hprt0(hsotg); | |
1346 | dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0); | |
1347 | hprt0 &= ~HPRT0_RES; | |
1348 | writel(hprt0, hsotg->regs + HPRT0); | |
1349 | dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n", | |
1350 | readl(hsotg->regs + HPRT0)); | |
1351 | ||
1352 | dwc2_hcd_rem_wakeup(hsotg); | |
1353 | ||
1354 | /* Change to L0 state */ | |
1355 | hsotg->lx_state = DWC2_L0; | |
1356 | } | |
1357 | ||
1358 | static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg) | |
1359 | { | |
1360 | struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); | |
1361 | ||
1362 | return hcd->self.b_hnp_enable; | |
1363 | } | |
1364 | ||
1365 | /* Must NOT be called with interrupt disabled or spinlock held */ | |
1366 | static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex) | |
1367 | { | |
1368 | unsigned long flags; | |
1369 | u32 hprt0; | |
1370 | u32 pcgctl; | |
1371 | u32 gotgctl; | |
1372 | ||
1373 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
1374 | ||
1375 | spin_lock_irqsave(&hsotg->lock, flags); | |
1376 | ||
1377 | if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) { | |
1378 | gotgctl = readl(hsotg->regs + GOTGCTL); | |
1379 | gotgctl |= GOTGCTL_HSTSETHNPEN; | |
1380 | writel(gotgctl, hsotg->regs + GOTGCTL); | |
1381 | hsotg->op_state = OTG_STATE_A_SUSPEND; | |
1382 | } | |
1383 | ||
1384 | hprt0 = dwc2_read_hprt0(hsotg); | |
1385 | hprt0 |= HPRT0_SUSP; | |
1386 | writel(hprt0, hsotg->regs + HPRT0); | |
1387 | ||
1388 | /* Update lx_state */ | |
1389 | hsotg->lx_state = DWC2_L2; | |
1390 | ||
1391 | /* Suspend the Phy Clock */ | |
1392 | pcgctl = readl(hsotg->regs + PCGCTL); | |
1393 | pcgctl |= PCGCTL_STOPPCLK; | |
1394 | writel(pcgctl, hsotg->regs + PCGCTL); | |
1395 | udelay(10); | |
1396 | ||
1397 | /* For HNP the bus must be suspended for at least 200ms */ | |
1398 | if (dwc2_host_is_b_hnp_enabled(hsotg)) { | |
1399 | pcgctl = readl(hsotg->regs + PCGCTL); | |
1400 | pcgctl &= ~PCGCTL_STOPPCLK; | |
1401 | writel(pcgctl, hsotg->regs + PCGCTL); | |
1402 | ||
1403 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
1404 | ||
1405 | usleep_range(200000, 250000); | |
1406 | } else { | |
1407 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | /* Handles hub class-specific requests */ | |
1412 | static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq, | |
1413 | u16 wvalue, u16 windex, char *buf, u16 wlength) | |
1414 | { | |
1415 | struct usb_hub_descriptor *hub_desc; | |
1416 | int retval = 0; | |
1417 | u32 hprt0; | |
1418 | u32 port_status; | |
1419 | u32 speed; | |
1420 | u32 pcgctl; | |
1421 | ||
1422 | switch (typereq) { | |
1423 | case ClearHubFeature: | |
1424 | dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue); | |
1425 | ||
1426 | switch (wvalue) { | |
1427 | case C_HUB_LOCAL_POWER: | |
1428 | case C_HUB_OVER_CURRENT: | |
1429 | /* Nothing required here */ | |
1430 | break; | |
1431 | ||
1432 | default: | |
1433 | retval = -EINVAL; | |
1434 | dev_err(hsotg->dev, | |
1435 | "ClearHubFeature request %1xh unknown\n", | |
1436 | wvalue); | |
1437 | } | |
1438 | break; | |
1439 | ||
1440 | case ClearPortFeature: | |
1441 | if (wvalue != USB_PORT_FEAT_L1) | |
1442 | if (!windex || windex > 1) | |
1443 | goto error; | |
1444 | switch (wvalue) { | |
1445 | case USB_PORT_FEAT_ENABLE: | |
1446 | dev_dbg(hsotg->dev, | |
1447 | "ClearPortFeature USB_PORT_FEAT_ENABLE\n"); | |
1448 | hprt0 = dwc2_read_hprt0(hsotg); | |
1449 | hprt0 |= HPRT0_ENA; | |
1450 | writel(hprt0, hsotg->regs + HPRT0); | |
1451 | break; | |
1452 | ||
1453 | case USB_PORT_FEAT_SUSPEND: | |
1454 | dev_dbg(hsotg->dev, | |
1455 | "ClearPortFeature USB_PORT_FEAT_SUSPEND\n"); | |
1456 | writel(0, hsotg->regs + PCGCTL); | |
1457 | usleep_range(20000, 40000); | |
1458 | ||
1459 | hprt0 = dwc2_read_hprt0(hsotg); | |
1460 | hprt0 |= HPRT0_RES; | |
1461 | writel(hprt0, hsotg->regs + HPRT0); | |
1462 | hprt0 &= ~HPRT0_SUSP; | |
1463 | usleep_range(100000, 150000); | |
1464 | ||
1465 | hprt0 &= ~HPRT0_RES; | |
1466 | writel(hprt0, hsotg->regs + HPRT0); | |
1467 | break; | |
1468 | ||
1469 | case USB_PORT_FEAT_POWER: | |
1470 | dev_dbg(hsotg->dev, | |
1471 | "ClearPortFeature USB_PORT_FEAT_POWER\n"); | |
1472 | hprt0 = dwc2_read_hprt0(hsotg); | |
1473 | hprt0 &= ~HPRT0_PWR; | |
1474 | writel(hprt0, hsotg->regs + HPRT0); | |
1475 | break; | |
1476 | ||
1477 | case USB_PORT_FEAT_INDICATOR: | |
1478 | dev_dbg(hsotg->dev, | |
1479 | "ClearPortFeature USB_PORT_FEAT_INDICATOR\n"); | |
1480 | /* Port indicator not supported */ | |
1481 | break; | |
1482 | ||
1483 | case USB_PORT_FEAT_C_CONNECTION: | |
1484 | /* | |
1485 | * Clears driver's internal Connect Status Change flag | |
1486 | */ | |
1487 | dev_dbg(hsotg->dev, | |
1488 | "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n"); | |
1489 | hsotg->flags.b.port_connect_status_change = 0; | |
1490 | break; | |
1491 | ||
1492 | case USB_PORT_FEAT_C_RESET: | |
1493 | /* Clears driver's internal Port Reset Change flag */ | |
1494 | dev_dbg(hsotg->dev, | |
1495 | "ClearPortFeature USB_PORT_FEAT_C_RESET\n"); | |
1496 | hsotg->flags.b.port_reset_change = 0; | |
1497 | break; | |
1498 | ||
1499 | case USB_PORT_FEAT_C_ENABLE: | |
1500 | /* | |
1501 | * Clears the driver's internal Port Enable/Disable | |
1502 | * Change flag | |
1503 | */ | |
1504 | dev_dbg(hsotg->dev, | |
1505 | "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n"); | |
1506 | hsotg->flags.b.port_enable_change = 0; | |
1507 | break; | |
1508 | ||
1509 | case USB_PORT_FEAT_C_SUSPEND: | |
1510 | /* | |
1511 | * Clears the driver's internal Port Suspend Change | |
1512 | * flag, which is set when resume signaling on the host | |
1513 | * port is complete | |
1514 | */ | |
1515 | dev_dbg(hsotg->dev, | |
1516 | "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n"); | |
1517 | hsotg->flags.b.port_suspend_change = 0; | |
1518 | break; | |
1519 | ||
1520 | case USB_PORT_FEAT_C_PORT_L1: | |
1521 | dev_dbg(hsotg->dev, | |
1522 | "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n"); | |
1523 | hsotg->flags.b.port_l1_change = 0; | |
1524 | break; | |
1525 | ||
1526 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
1527 | dev_dbg(hsotg->dev, | |
1528 | "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n"); | |
1529 | hsotg->flags.b.port_over_current_change = 0; | |
1530 | break; | |
1531 | ||
1532 | default: | |
1533 | retval = -EINVAL; | |
1534 | dev_err(hsotg->dev, | |
1535 | "ClearPortFeature request %1xh unknown or unsupported\n", | |
1536 | wvalue); | |
1537 | } | |
1538 | break; | |
1539 | ||
1540 | case GetHubDescriptor: | |
1541 | dev_dbg(hsotg->dev, "GetHubDescriptor\n"); | |
1542 | hub_desc = (struct usb_hub_descriptor *)buf; | |
1543 | hub_desc->bDescLength = 9; | |
1544 | hub_desc->bDescriptorType = 0x29; | |
1545 | hub_desc->bNbrPorts = 1; | |
1546 | hub_desc->wHubCharacteristics = cpu_to_le16(0x08); | |
1547 | hub_desc->bPwrOn2PwrGood = 1; | |
1548 | hub_desc->bHubContrCurrent = 0; | |
1549 | hub_desc->u.hs.DeviceRemovable[0] = 0; | |
1550 | hub_desc->u.hs.DeviceRemovable[1] = 0xff; | |
1551 | break; | |
1552 | ||
1553 | case GetHubStatus: | |
1554 | dev_dbg(hsotg->dev, "GetHubStatus\n"); | |
1555 | memset(buf, 0, 4); | |
1556 | break; | |
1557 | ||
1558 | case GetPortStatus: | |
1559 | dev_dbg(hsotg->dev, | |
1560 | "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex, | |
1561 | hsotg->flags.d32); | |
1562 | if (!windex || windex > 1) | |
1563 | goto error; | |
1564 | ||
1565 | port_status = 0; | |
1566 | if (hsotg->flags.b.port_connect_status_change) | |
1567 | port_status |= USB_PORT_STAT_C_CONNECTION << 16; | |
1568 | if (hsotg->flags.b.port_enable_change) | |
1569 | port_status |= USB_PORT_STAT_C_ENABLE << 16; | |
1570 | if (hsotg->flags.b.port_suspend_change) | |
1571 | port_status |= USB_PORT_STAT_C_SUSPEND << 16; | |
1572 | if (hsotg->flags.b.port_l1_change) | |
1573 | port_status |= USB_PORT_STAT_C_L1 << 16; | |
1574 | if (hsotg->flags.b.port_reset_change) | |
1575 | port_status |= USB_PORT_STAT_C_RESET << 16; | |
1576 | if (hsotg->flags.b.port_over_current_change) { | |
1577 | dev_warn(hsotg->dev, "Overcurrent change detected\n"); | |
1578 | port_status |= USB_PORT_STAT_C_OVERCURRENT << 16; | |
1579 | } | |
1580 | ||
1581 | if (!hsotg->flags.b.port_connect_status) { | |
1582 | /* | |
1583 | * The port is disconnected, which means the core is | |
1584 | * either in device mode or it soon will be. Just | |
1585 | * return 0's for the remainder of the port status | |
1586 | * since the port register can't be read if the core | |
1587 | * is in device mode. | |
1588 | */ | |
1589 | *(__le32 *)buf = cpu_to_le32(port_status); | |
1590 | break; | |
1591 | } | |
1592 | ||
1593 | hprt0 = readl(hsotg->regs + HPRT0); | |
1594 | dev_dbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0); | |
1595 | ||
1596 | if (hprt0 & HPRT0_CONNSTS) | |
1597 | port_status |= USB_PORT_STAT_CONNECTION; | |
1598 | if (hprt0 & HPRT0_ENA) | |
1599 | port_status |= USB_PORT_STAT_ENABLE; | |
1600 | if (hprt0 & HPRT0_SUSP) | |
1601 | port_status |= USB_PORT_STAT_SUSPEND; | |
1602 | if (hprt0 & HPRT0_OVRCURRACT) | |
1603 | port_status |= USB_PORT_STAT_OVERCURRENT; | |
1604 | if (hprt0 & HPRT0_RST) | |
1605 | port_status |= USB_PORT_STAT_RESET; | |
1606 | if (hprt0 & HPRT0_PWR) | |
1607 | port_status |= USB_PORT_STAT_POWER; | |
1608 | ||
1609 | speed = hprt0 & HPRT0_SPD_MASK; | |
1610 | if (speed == HPRT0_SPD_HIGH_SPEED) | |
1611 | port_status |= USB_PORT_STAT_HIGH_SPEED; | |
1612 | else if (speed == HPRT0_SPD_LOW_SPEED) | |
1613 | port_status |= USB_PORT_STAT_LOW_SPEED; | |
1614 | ||
1615 | if (hprt0 & HPRT0_TSTCTL_MASK) | |
1616 | port_status |= USB_PORT_STAT_TEST; | |
1617 | /* USB_PORT_FEAT_INDICATOR unsupported always 0 */ | |
1618 | ||
1619 | dev_dbg(hsotg->dev, "port_status=%08x\n", port_status); | |
1620 | *(__le32 *)buf = cpu_to_le32(port_status); | |
1621 | break; | |
1622 | ||
1623 | case SetHubFeature: | |
1624 | dev_dbg(hsotg->dev, "SetHubFeature\n"); | |
1625 | /* No HUB features supported */ | |
1626 | break; | |
1627 | ||
1628 | case SetPortFeature: | |
1629 | dev_dbg(hsotg->dev, "SetPortFeature\n"); | |
1630 | if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1)) | |
1631 | goto error; | |
1632 | ||
1633 | if (!hsotg->flags.b.port_connect_status) { | |
1634 | /* | |
1635 | * The port is disconnected, which means the core is | |
1636 | * either in device mode or it soon will be. Just | |
1637 | * return without doing anything since the port | |
1638 | * register can't be written if the core is in device | |
1639 | * mode. | |
1640 | */ | |
1641 | break; | |
1642 | } | |
1643 | ||
1644 | switch (wvalue) { | |
1645 | case USB_PORT_FEAT_SUSPEND: | |
1646 | dev_dbg(hsotg->dev, | |
1647 | "SetPortFeature - USB_PORT_FEAT_SUSPEND\n"); | |
1648 | if (windex != hsotg->otg_port) | |
1649 | goto error; | |
1650 | dwc2_port_suspend(hsotg, windex); | |
1651 | break; | |
1652 | ||
1653 | case USB_PORT_FEAT_POWER: | |
1654 | dev_dbg(hsotg->dev, | |
1655 | "SetPortFeature - USB_PORT_FEAT_POWER\n"); | |
1656 | hprt0 = dwc2_read_hprt0(hsotg); | |
1657 | hprt0 |= HPRT0_PWR; | |
1658 | writel(hprt0, hsotg->regs + HPRT0); | |
1659 | break; | |
1660 | ||
1661 | case USB_PORT_FEAT_RESET: | |
1662 | hprt0 = dwc2_read_hprt0(hsotg); | |
1663 | dev_dbg(hsotg->dev, | |
1664 | "SetPortFeature - USB_PORT_FEAT_RESET\n"); | |
1665 | pcgctl = readl(hsotg->regs + PCGCTL); | |
1666 | pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK); | |
1667 | writel(pcgctl, hsotg->regs + PCGCTL); | |
1668 | /* ??? Original driver does this */ | |
1669 | writel(0, hsotg->regs + PCGCTL); | |
1670 | ||
1671 | hprt0 = dwc2_read_hprt0(hsotg); | |
1672 | /* Clear suspend bit if resetting from suspend state */ | |
1673 | hprt0 &= ~HPRT0_SUSP; | |
1674 | ||
1675 | /* | |
1676 | * When B-Host the Port reset bit is set in the Start | |
1677 | * HCD Callback function, so that the reset is started | |
1678 | * within 1ms of the HNP success interrupt | |
1679 | */ | |
1680 | if (!dwc2_hcd_is_b_host(hsotg)) { | |
1681 | hprt0 |= HPRT0_PWR | HPRT0_RST; | |
1682 | dev_dbg(hsotg->dev, | |
1683 | "In host mode, hprt0=%08x\n", hprt0); | |
1684 | writel(hprt0, hsotg->regs + HPRT0); | |
1685 | } | |
1686 | ||
1687 | /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */ | |
1688 | usleep_range(50000, 70000); | |
1689 | hprt0 &= ~HPRT0_RST; | |
1690 | writel(hprt0, hsotg->regs + HPRT0); | |
1691 | hsotg->lx_state = DWC2_L0; /* Now back to On state */ | |
1692 | break; | |
1693 | ||
1694 | case USB_PORT_FEAT_INDICATOR: | |
1695 | dev_dbg(hsotg->dev, | |
1696 | "SetPortFeature - USB_PORT_FEAT_INDICATOR\n"); | |
1697 | /* Not supported */ | |
1698 | break; | |
1699 | ||
1700 | default: | |
1701 | retval = -EINVAL; | |
1702 | dev_err(hsotg->dev, | |
1703 | "SetPortFeature %1xh unknown or unsupported\n", | |
1704 | wvalue); | |
1705 | break; | |
1706 | } | |
1707 | break; | |
1708 | ||
1709 | default: | |
1710 | error: | |
1711 | retval = -EINVAL; | |
1712 | dev_dbg(hsotg->dev, | |
1713 | "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n", | |
1714 | typereq, windex, wvalue); | |
1715 | break; | |
1716 | } | |
1717 | ||
1718 | return retval; | |
1719 | } | |
1720 | ||
1721 | static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port) | |
1722 | { | |
1723 | int retval; | |
1724 | ||
1725 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
1726 | ||
1727 | if (port != 1) | |
1728 | return -EINVAL; | |
1729 | ||
1730 | retval = (hsotg->flags.b.port_connect_status_change || | |
1731 | hsotg->flags.b.port_reset_change || | |
1732 | hsotg->flags.b.port_enable_change || | |
1733 | hsotg->flags.b.port_suspend_change || | |
1734 | hsotg->flags.b.port_over_current_change); | |
1735 | ||
1736 | if (retval) { | |
1737 | dev_dbg(hsotg->dev, | |
1738 | "DWC OTG HCD HUB STATUS DATA: Root port status changed\n"); | |
1739 | dev_dbg(hsotg->dev, " port_connect_status_change: %d\n", | |
1740 | hsotg->flags.b.port_connect_status_change); | |
1741 | dev_dbg(hsotg->dev, " port_reset_change: %d\n", | |
1742 | hsotg->flags.b.port_reset_change); | |
1743 | dev_dbg(hsotg->dev, " port_enable_change: %d\n", | |
1744 | hsotg->flags.b.port_enable_change); | |
1745 | dev_dbg(hsotg->dev, " port_suspend_change: %d\n", | |
1746 | hsotg->flags.b.port_suspend_change); | |
1747 | dev_dbg(hsotg->dev, " port_over_current_change: %d\n", | |
1748 | hsotg->flags.b.port_over_current_change); | |
1749 | } | |
1750 | ||
1751 | return retval; | |
1752 | } | |
1753 | ||
1754 | int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) | |
1755 | { | |
1756 | u32 hfnum = readl(hsotg->regs + HFNUM); | |
1757 | ||
1758 | #ifdef DWC2_DEBUG_SOF | |
1759 | dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n", | |
1760 | hfnum >> HFNUM_FRNUM_SHIFT & | |
1761 | HFNUM_FRNUM_MASK >> HFNUM_FRNUM_SHIFT); | |
1762 | #endif | |
1763 | return hfnum >> HFNUM_FRNUM_SHIFT & | |
1764 | HFNUM_FRNUM_MASK >> HFNUM_FRNUM_SHIFT; | |
1765 | } | |
1766 | ||
1767 | int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg) | |
1768 | { | |
1769 | return (hsotg->op_state == OTG_STATE_B_HOST); | |
1770 | } | |
1771 | ||
1772 | static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg, | |
1773 | int iso_desc_count, | |
1774 | gfp_t mem_flags) | |
1775 | { | |
1776 | struct dwc2_hcd_urb *urb; | |
1777 | u32 size = sizeof(*urb) + iso_desc_count * | |
1778 | sizeof(struct dwc2_hcd_iso_packet_desc); | |
1779 | ||
1780 | urb = kzalloc(size, mem_flags); | |
1781 | if (urb) | |
1782 | urb->packet_count = iso_desc_count; | |
1783 | return urb; | |
1784 | } | |
1785 | ||
1786 | static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg, | |
1787 | struct dwc2_hcd_urb *urb, u8 dev_addr, | |
1788 | u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps) | |
1789 | { | |
1790 | dev_vdbg(hsotg->dev, | |
1791 | "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n", | |
1792 | dev_addr, ep_num, ep_dir, ep_type, mps); | |
1793 | urb->pipe_info.dev_addr = dev_addr; | |
1794 | urb->pipe_info.ep_num = ep_num; | |
1795 | urb->pipe_info.pipe_type = ep_type; | |
1796 | urb->pipe_info.pipe_dir = ep_dir; | |
1797 | urb->pipe_info.mps = mps; | |
1798 | } | |
1799 | ||
1800 | /* | |
1801 | * NOTE: This function will be removed once the peripheral controller code | |
1802 | * is integrated and the driver is stable | |
1803 | */ | |
1804 | void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg) | |
1805 | { | |
1806 | #ifdef DEBUG | |
1807 | struct dwc2_host_chan *chan; | |
1808 | struct dwc2_hcd_urb *urb; | |
1809 | struct dwc2_qtd *qtd; | |
1810 | int num_channels; | |
1811 | u32 np_tx_status; | |
1812 | u32 p_tx_status; | |
1813 | int i; | |
1814 | ||
1815 | num_channels = hsotg->core_params->host_channels; | |
1816 | dev_dbg(hsotg->dev, "\n"); | |
1817 | dev_dbg(hsotg->dev, | |
1818 | "************************************************************\n"); | |
1819 | dev_dbg(hsotg->dev, "HCD State:\n"); | |
1820 | dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels); | |
1821 | ||
1822 | for (i = 0; i < num_channels; i++) { | |
1823 | chan = hsotg->hc_ptr_array[i]; | |
1824 | dev_dbg(hsotg->dev, " Channel %d:\n", i); | |
1825 | dev_dbg(hsotg->dev, | |
1826 | " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", | |
1827 | chan->dev_addr, chan->ep_num, chan->ep_is_in); | |
1828 | dev_dbg(hsotg->dev, " speed: %d\n", chan->speed); | |
1829 | dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); | |
1830 | dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet); | |
1831 | dev_dbg(hsotg->dev, " data_pid_start: %d\n", | |
1832 | chan->data_pid_start); | |
1833 | dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count); | |
1834 | dev_dbg(hsotg->dev, " xfer_started: %d\n", | |
1835 | chan->xfer_started); | |
1836 | dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); | |
1837 | dev_dbg(hsotg->dev, " xfer_dma: %08lx\n", | |
1838 | (unsigned long)chan->xfer_dma); | |
1839 | dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); | |
1840 | dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count); | |
1841 | dev_dbg(hsotg->dev, " halt_on_queue: %d\n", | |
1842 | chan->halt_on_queue); | |
1843 | dev_dbg(hsotg->dev, " halt_pending: %d\n", | |
1844 | chan->halt_pending); | |
1845 | dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); | |
1846 | dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split); | |
1847 | dev_dbg(hsotg->dev, " complete_split: %d\n", | |
1848 | chan->complete_split); | |
1849 | dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr); | |
1850 | dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port); | |
1851 | dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos); | |
1852 | dev_dbg(hsotg->dev, " requests: %d\n", chan->requests); | |
1853 | dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); | |
1854 | ||
1855 | if (chan->xfer_started) { | |
1856 | u32 hfnum, hcchar, hctsiz, hcint, hcintmsk; | |
1857 | ||
1858 | hfnum = readl(hsotg->regs + HFNUM); | |
1859 | hcchar = readl(hsotg->regs + HCCHAR(i)); | |
1860 | hctsiz = readl(hsotg->regs + HCTSIZ(i)); | |
1861 | hcint = readl(hsotg->regs + HCINT(i)); | |
1862 | hcintmsk = readl(hsotg->regs + HCINTMSK(i)); | |
1863 | dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum); | |
1864 | dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar); | |
1865 | dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz); | |
1866 | dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint); | |
1867 | dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk); | |
1868 | } | |
1869 | ||
1870 | if (!(chan->xfer_started && chan->qh)) | |
1871 | continue; | |
1872 | ||
1873 | list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) { | |
1874 | if (!qtd->in_process) | |
1875 | break; | |
1876 | urb = qtd->urb; | |
1877 | dev_dbg(hsotg->dev, " URB Info:\n"); | |
1878 | dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n", | |
1879 | qtd, urb); | |
1880 | if (urb) { | |
1881 | dev_dbg(hsotg->dev, | |
1882 | " Dev: %d, EP: %d %s\n", | |
1883 | dwc2_hcd_get_dev_addr(&urb->pipe_info), | |
1884 | dwc2_hcd_get_ep_num(&urb->pipe_info), | |
1885 | dwc2_hcd_is_pipe_in(&urb->pipe_info) ? | |
1886 | "IN" : "OUT"); | |
1887 | dev_dbg(hsotg->dev, | |
1888 | " Max packet size: %d\n", | |
1889 | dwc2_hcd_get_mps(&urb->pipe_info)); | |
1890 | dev_dbg(hsotg->dev, | |
1891 | " transfer_buffer: %p\n", | |
1892 | urb->buf); | |
157dfaac PZ |
1893 | dev_dbg(hsotg->dev, |
1894 | " transfer_dma: %08lx\n", | |
1895 | (unsigned long)urb->dma); | |
7359d482 PZ |
1896 | dev_dbg(hsotg->dev, |
1897 | " transfer_buffer_length: %d\n", | |
1898 | urb->length); | |
1899 | dev_dbg(hsotg->dev, " actual_length: %d\n", | |
1900 | urb->actual_length); | |
1901 | } | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | dev_dbg(hsotg->dev, " non_periodic_channels: %d\n", | |
1906 | hsotg->non_periodic_channels); | |
1907 | dev_dbg(hsotg->dev, " periodic_channels: %d\n", | |
1908 | hsotg->periodic_channels); | |
1909 | dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs); | |
1910 | np_tx_status = readl(hsotg->regs + GNPTXSTS); | |
1911 | dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n", | |
1912 | np_tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1913 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT); | |
1914 | dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n", | |
1915 | np_tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1916 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT); | |
1917 | p_tx_status = readl(hsotg->regs + HPTXSTS); | |
1918 | dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n", | |
1919 | p_tx_status >> TXSTS_QSPCAVAIL_SHIFT & | |
1920 | TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT); | |
1921 | dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n", | |
1922 | p_tx_status >> TXSTS_FSPCAVAIL_SHIFT & | |
1923 | TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT); | |
1924 | dwc2_hcd_dump_frrem(hsotg); | |
1925 | dwc2_dump_global_registers(hsotg); | |
1926 | dwc2_dump_host_registers(hsotg); | |
1927 | dev_dbg(hsotg->dev, | |
1928 | "************************************************************\n"); | |
1929 | dev_dbg(hsotg->dev, "\n"); | |
1930 | #endif | |
1931 | } | |
1932 | ||
1933 | /* | |
1934 | * NOTE: This function will be removed once the peripheral controller code | |
1935 | * is integrated and the driver is stable | |
1936 | */ | |
1937 | void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg) | |
1938 | { | |
1939 | #ifdef DWC2_DUMP_FRREM | |
1940 | dev_dbg(hsotg->dev, "Frame remaining at SOF:\n"); | |
1941 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1942 | hsotg->frrem_samples, hsotg->frrem_accum, | |
1943 | hsotg->frrem_samples > 0 ? | |
1944 | hsotg->frrem_accum / hsotg->frrem_samples : 0); | |
1945 | dev_dbg(hsotg->dev, "\n"); | |
1946 | dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n"); | |
1947 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1948 | hsotg->hfnum_7_samples, | |
1949 | hsotg->hfnum_7_frrem_accum, | |
1950 | hsotg->hfnum_7_samples > 0 ? | |
1951 | hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0); | |
1952 | dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n"); | |
1953 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1954 | hsotg->hfnum_0_samples, | |
1955 | hsotg->hfnum_0_frrem_accum, | |
1956 | hsotg->hfnum_0_samples > 0 ? | |
1957 | hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0); | |
1958 | dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n"); | |
1959 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1960 | hsotg->hfnum_other_samples, | |
1961 | hsotg->hfnum_other_frrem_accum, | |
1962 | hsotg->hfnum_other_samples > 0 ? | |
1963 | hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples : | |
1964 | 0); | |
1965 | dev_dbg(hsotg->dev, "\n"); | |
1966 | dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n"); | |
1967 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1968 | hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a, | |
1969 | hsotg->hfnum_7_samples_a > 0 ? | |
1970 | hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0); | |
1971 | dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n"); | |
1972 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1973 | hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a, | |
1974 | hsotg->hfnum_0_samples_a > 0 ? | |
1975 | hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0); | |
1976 | dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n"); | |
1977 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1978 | hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a, | |
1979 | hsotg->hfnum_other_samples_a > 0 ? | |
1980 | hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a | |
1981 | : 0); | |
1982 | dev_dbg(hsotg->dev, "\n"); | |
1983 | dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n"); | |
1984 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1985 | hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b, | |
1986 | hsotg->hfnum_7_samples_b > 0 ? | |
1987 | hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0); | |
1988 | dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n"); | |
1989 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1990 | hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b, | |
1991 | (hsotg->hfnum_0_samples_b > 0) ? | |
1992 | hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0); | |
1993 | dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n"); | |
1994 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
1995 | hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b, | |
1996 | (hsotg->hfnum_other_samples_b > 0) ? | |
1997 | hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b | |
1998 | : 0); | |
1999 | #endif | |
2000 | } | |
2001 | ||
2002 | struct wrapper_priv_data { | |
2003 | struct dwc2_hsotg *hsotg; | |
2004 | }; | |
2005 | ||
2006 | /* Gets the dwc2_hsotg from a usb_hcd */ | |
2007 | static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd) | |
2008 | { | |
2009 | struct wrapper_priv_data *p; | |
2010 | ||
2011 | p = (struct wrapper_priv_data *) &hcd->hcd_priv; | |
2012 | return p->hsotg; | |
2013 | } | |
2014 | ||
2015 | static int _dwc2_hcd_start(struct usb_hcd *hcd); | |
2016 | ||
2017 | void dwc2_host_start(struct dwc2_hsotg *hsotg) | |
2018 | { | |
2019 | struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); | |
2020 | ||
2021 | hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg); | |
2022 | _dwc2_hcd_start(hcd); | |
2023 | } | |
2024 | ||
2025 | void dwc2_host_disconnect(struct dwc2_hsotg *hsotg) | |
2026 | { | |
2027 | struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); | |
2028 | ||
2029 | hcd->self.is_b_host = 0; | |
2030 | } | |
2031 | ||
2032 | void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, int *hub_addr, | |
2033 | int *hub_port) | |
2034 | { | |
2035 | struct urb *urb = context; | |
2036 | ||
2037 | if (urb->dev->tt) | |
2038 | *hub_addr = urb->dev->tt->hub->devnum; | |
2039 | else | |
2040 | *hub_addr = 0; | |
2041 | *hub_port = urb->dev->ttport; | |
2042 | } | |
2043 | ||
2044 | int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context) | |
2045 | { | |
2046 | struct urb *urb = context; | |
2047 | ||
2048 | return urb->dev->speed; | |
2049 | } | |
2050 | ||
2051 | static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw, | |
2052 | struct urb *urb) | |
2053 | { | |
2054 | struct usb_bus *bus = hcd_to_bus(hcd); | |
2055 | ||
2056 | if (urb->interval) | |
2057 | bus->bandwidth_allocated += bw / urb->interval; | |
2058 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) | |
2059 | bus->bandwidth_isoc_reqs++; | |
2060 | else | |
2061 | bus->bandwidth_int_reqs++; | |
2062 | } | |
2063 | ||
2064 | static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw, | |
2065 | struct urb *urb) | |
2066 | { | |
2067 | struct usb_bus *bus = hcd_to_bus(hcd); | |
2068 | ||
2069 | if (urb->interval) | |
2070 | bus->bandwidth_allocated -= bw / urb->interval; | |
2071 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) | |
2072 | bus->bandwidth_isoc_reqs--; | |
2073 | else | |
2074 | bus->bandwidth_int_reqs--; | |
2075 | } | |
2076 | ||
2077 | /* | |
2078 | * Sets the final status of an URB and returns it to the upper layer. Any | |
2079 | * required cleanup of the URB is performed. | |
2080 | * | |
2081 | * Must be called with interrupt disabled and spinlock held | |
2082 | */ | |
2083 | void dwc2_host_complete(struct dwc2_hsotg *hsotg, void *context, | |
2084 | struct dwc2_hcd_urb *dwc2_urb, int status) | |
2085 | { | |
2086 | struct urb *urb = context; | |
2087 | int i; | |
2088 | ||
2089 | if (!urb) { | |
2090 | dev_dbg(hsotg->dev, "## %s: context is NULL ##\n", __func__); | |
2091 | return; | |
2092 | } | |
2093 | ||
2094 | if (!dwc2_urb) { | |
2095 | dev_dbg(hsotg->dev, "## %s: dwc2_urb is NULL ##\n", __func__); | |
2096 | return; | |
2097 | } | |
2098 | ||
2099 | urb->actual_length = dwc2_hcd_urb_get_actual_length(dwc2_urb); | |
2100 | ||
2101 | dev_vdbg(hsotg->dev, | |
2102 | "%s: urb %p device %d ep %d-%s status %d actual %d\n", | |
2103 | __func__, urb, usb_pipedevice(urb->pipe), | |
2104 | usb_pipeendpoint(urb->pipe), | |
2105 | usb_pipein(urb->pipe) ? "IN" : "OUT", status, | |
2106 | urb->actual_length); | |
2107 | ||
2108 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
2109 | for (i = 0; i < urb->number_of_packets; i++) | |
2110 | dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n", | |
2111 | i, urb->iso_frame_desc[i].status); | |
2112 | } | |
2113 | ||
2114 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
2115 | urb->error_count = dwc2_hcd_urb_get_error_count(dwc2_urb); | |
2116 | for (i = 0; i < urb->number_of_packets; ++i) { | |
2117 | urb->iso_frame_desc[i].actual_length = | |
2118 | dwc2_hcd_urb_get_iso_desc_actual_length( | |
2119 | dwc2_urb, i); | |
2120 | urb->iso_frame_desc[i].status = | |
2121 | dwc2_hcd_urb_get_iso_desc_status(dwc2_urb, i); | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | urb->status = status; | |
2126 | urb->hcpriv = NULL; | |
2127 | if (!status) { | |
2128 | if ((urb->transfer_flags & URB_SHORT_NOT_OK) && | |
2129 | urb->actual_length < urb->transfer_buffer_length) | |
2130 | urb->status = -EREMOTEIO; | |
2131 | } | |
2132 | ||
2133 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS || | |
2134 | usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
2135 | struct usb_host_endpoint *ep = urb->ep; | |
2136 | ||
2137 | if (ep) | |
2138 | dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg), | |
2139 | dwc2_hcd_get_ep_bandwidth(hsotg, ep), | |
2140 | urb); | |
2141 | } | |
2142 | ||
2143 | kfree(dwc2_urb); | |
2144 | ||
2145 | spin_unlock(&hsotg->lock); | |
2146 | usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status); | |
2147 | spin_lock(&hsotg->lock); | |
2148 | } | |
2149 | ||
2150 | /* | |
2151 | * Work queue function for starting the HCD when A-Cable is connected | |
2152 | */ | |
2153 | static void dwc2_hcd_start_func(struct work_struct *work) | |
2154 | { | |
2155 | struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, | |
2156 | start_work.work); | |
2157 | ||
2158 | dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg); | |
2159 | dwc2_host_start(hsotg); | |
2160 | } | |
2161 | ||
2162 | /* | |
2163 | * Reset work queue function | |
2164 | */ | |
2165 | static void dwc2_hcd_reset_func(struct work_struct *work) | |
2166 | { | |
2167 | struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, | |
2168 | reset_work.work); | |
2169 | u32 hprt0; | |
2170 | ||
2171 | dev_dbg(hsotg->dev, "USB RESET function called\n"); | |
2172 | hprt0 = dwc2_read_hprt0(hsotg); | |
2173 | hprt0 &= ~HPRT0_RST; | |
2174 | writel(hprt0, hsotg->regs + HPRT0); | |
2175 | hsotg->flags.b.port_reset_change = 1; | |
2176 | } | |
2177 | ||
2178 | /* | |
2179 | * ========================================================================= | |
2180 | * Linux HC Driver Functions | |
2181 | * ========================================================================= | |
2182 | */ | |
2183 | ||
2184 | /* | |
2185 | * Initializes the DWC_otg controller and its root hub and prepares it for host | |
2186 | * mode operation. Activates the root port. Returns 0 on success and a negative | |
2187 | * error code on failure. | |
2188 | */ | |
2189 | static int _dwc2_hcd_start(struct usb_hcd *hcd) | |
2190 | { | |
2191 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2192 | struct usb_bus *bus = hcd_to_bus(hcd); | |
2193 | unsigned long flags; | |
2194 | ||
2195 | dev_dbg(hsotg->dev, "DWC OTG HCD START\n"); | |
2196 | ||
2197 | spin_lock_irqsave(&hsotg->lock, flags); | |
2198 | ||
2199 | hcd->state = HC_STATE_RUNNING; | |
2200 | ||
2201 | if (dwc2_is_device_mode(hsotg)) { | |
2202 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2203 | return 0; /* why 0 ?? */ | |
2204 | } | |
2205 | ||
2206 | dwc2_hcd_reinit(hsotg); | |
2207 | ||
2208 | /* Initialize and connect root hub if one is not already attached */ | |
2209 | if (bus->root_hub) { | |
2210 | dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n"); | |
2211 | /* Inform the HUB driver to resume */ | |
2212 | usb_hcd_resume_root_hub(hcd); | |
2213 | } | |
2214 | ||
2215 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2216 | return 0; | |
2217 | } | |
2218 | ||
2219 | /* | |
2220 | * Halts the DWC_otg host mode operations in a clean manner. USB transfers are | |
2221 | * stopped. | |
2222 | */ | |
2223 | static void _dwc2_hcd_stop(struct usb_hcd *hcd) | |
2224 | { | |
2225 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2226 | unsigned long flags; | |
2227 | ||
2228 | spin_lock_irqsave(&hsotg->lock, flags); | |
2229 | dwc2_hcd_stop(hsotg); | |
2230 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2231 | ||
2232 | usleep_range(1000, 3000); | |
2233 | } | |
2234 | ||
2235 | /* Returns the current frame number */ | |
2236 | static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd) | |
2237 | { | |
2238 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2239 | ||
2240 | return dwc2_hcd_get_frame_number(hsotg); | |
2241 | } | |
2242 | ||
2243 | static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb, | |
2244 | char *fn_name) | |
2245 | { | |
2246 | #ifdef VERBOSE_DEBUG | |
2247 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2248 | char *pipetype; | |
2249 | char *speed; | |
2250 | ||
2251 | dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb); | |
2252 | dev_vdbg(hsotg->dev, " Device address: %d\n", | |
2253 | usb_pipedevice(urb->pipe)); | |
2254 | dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n", | |
2255 | usb_pipeendpoint(urb->pipe), | |
2256 | usb_pipein(urb->pipe) ? "IN" : "OUT"); | |
2257 | ||
2258 | switch (usb_pipetype(urb->pipe)) { | |
2259 | case PIPE_CONTROL: | |
2260 | pipetype = "CONTROL"; | |
2261 | break; | |
2262 | case PIPE_BULK: | |
2263 | pipetype = "BULK"; | |
2264 | break; | |
2265 | case PIPE_INTERRUPT: | |
2266 | pipetype = "INTERRUPT"; | |
2267 | break; | |
2268 | case PIPE_ISOCHRONOUS: | |
2269 | pipetype = "ISOCHRONOUS"; | |
2270 | break; | |
2271 | default: | |
2272 | pipetype = "UNKNOWN"; | |
2273 | break; | |
2274 | } | |
2275 | ||
2276 | dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype, | |
2277 | usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ? | |
2278 | "IN" : "OUT"); | |
2279 | ||
2280 | switch (urb->dev->speed) { | |
2281 | case USB_SPEED_HIGH: | |
2282 | speed = "HIGH"; | |
2283 | break; | |
2284 | case USB_SPEED_FULL: | |
2285 | speed = "FULL"; | |
2286 | break; | |
2287 | case USB_SPEED_LOW: | |
2288 | speed = "LOW"; | |
2289 | break; | |
2290 | default: | |
2291 | speed = "UNKNOWN"; | |
2292 | break; | |
2293 | } | |
2294 | ||
2295 | dev_vdbg(hsotg->dev, " Speed: %s\n", speed); | |
2296 | dev_vdbg(hsotg->dev, " Max packet size: %d\n", | |
2297 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))); | |
2298 | dev_vdbg(hsotg->dev, " Data buffer length: %d\n", | |
2299 | urb->transfer_buffer_length); | |
157dfaac PZ |
2300 | dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n", |
2301 | urb->transfer_buffer, (unsigned long)urb->transfer_dma); | |
2302 | dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n", | |
2303 | urb->setup_packet, (unsigned long)urb->setup_dma); | |
7359d482 PZ |
2304 | dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval); |
2305 | ||
2306 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
2307 | int i; | |
2308 | ||
2309 | for (i = 0; i < urb->number_of_packets; i++) { | |
2310 | dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i); | |
2311 | dev_vdbg(hsotg->dev, " offset: %d, length %d\n", | |
2312 | urb->iso_frame_desc[i].offset, | |
2313 | urb->iso_frame_desc[i].length); | |
2314 | } | |
2315 | } | |
2316 | #endif | |
2317 | } | |
2318 | ||
2319 | /* | |
2320 | * Starts processing a USB transfer request specified by a USB Request Block | |
2321 | * (URB). mem_flags indicates the type of memory allocation to use while | |
2322 | * processing this URB. | |
2323 | */ | |
2324 | static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
2325 | gfp_t mem_flags) | |
2326 | { | |
2327 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2328 | struct usb_host_endpoint *ep = urb->ep; | |
2329 | struct dwc2_hcd_urb *dwc2_urb; | |
2330 | int i; | |
2331 | int alloc_bandwidth = 0; | |
2332 | int retval = 0; | |
2333 | u8 ep_type = 0; | |
2334 | u32 tflags = 0; | |
2335 | void *buf; | |
2336 | unsigned long flags; | |
2337 | ||
2338 | dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n"); | |
2339 | dwc2_dump_urb_info(hcd, urb, "urb_enqueue"); | |
2340 | ||
2341 | if (ep == NULL) | |
2342 | return -EINVAL; | |
2343 | ||
2344 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS || | |
2345 | usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
2346 | spin_lock_irqsave(&hsotg->lock, flags); | |
2347 | if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep)) | |
2348 | alloc_bandwidth = 1; | |
2349 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2350 | } | |
2351 | ||
2352 | switch (usb_pipetype(urb->pipe)) { | |
2353 | case PIPE_CONTROL: | |
2354 | ep_type = USB_ENDPOINT_XFER_CONTROL; | |
2355 | break; | |
2356 | case PIPE_ISOCHRONOUS: | |
2357 | ep_type = USB_ENDPOINT_XFER_ISOC; | |
2358 | break; | |
2359 | case PIPE_BULK: | |
2360 | ep_type = USB_ENDPOINT_XFER_BULK; | |
2361 | break; | |
2362 | case PIPE_INTERRUPT: | |
2363 | ep_type = USB_ENDPOINT_XFER_INT; | |
2364 | break; | |
2365 | default: | |
2366 | dev_warn(hsotg->dev, "Wrong ep type\n"); | |
2367 | } | |
2368 | ||
2369 | dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets, | |
2370 | mem_flags); | |
2371 | if (!dwc2_urb) | |
2372 | return -ENOMEM; | |
2373 | ||
2374 | dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe), | |
2375 | usb_pipeendpoint(urb->pipe), ep_type, | |
2376 | usb_pipein(urb->pipe), | |
2377 | usb_maxpacket(urb->dev, urb->pipe, | |
2378 | !(usb_pipein(urb->pipe)))); | |
2379 | ||
2380 | buf = urb->transfer_buffer; | |
2381 | if (hcd->self.uses_dma) { | |
2382 | /* | |
2383 | * Calculate virtual address from physical address, because | |
2384 | * some class driver may not fill transfer_buffer. | |
2385 | * In Buffer DMA mode virtual address is used, when handling | |
2386 | * non-DWORD aligned buffers. | |
2387 | */ | |
2388 | buf = bus_to_virt(urb->transfer_dma); | |
2389 | } | |
2390 | ||
2391 | if (!(urb->transfer_flags & URB_NO_INTERRUPT)) | |
2392 | tflags |= URB_GIVEBACK_ASAP; | |
2393 | if (urb->transfer_flags & URB_ZERO_PACKET) | |
2394 | tflags |= URB_SEND_ZERO_PACKET; | |
2395 | ||
2396 | dwc2_urb->priv = urb; | |
2397 | dwc2_urb->buf = buf; | |
2398 | dwc2_urb->dma = urb->transfer_dma; | |
2399 | dwc2_urb->length = urb->transfer_buffer_length; | |
2400 | dwc2_urb->setup_packet = urb->setup_packet; | |
2401 | dwc2_urb->setup_dma = urb->setup_dma; | |
2402 | dwc2_urb->flags = tflags; | |
2403 | dwc2_urb->interval = urb->interval; | |
2404 | dwc2_urb->status = -EINPROGRESS; | |
2405 | ||
2406 | for (i = 0; i < urb->number_of_packets; ++i) | |
2407 | dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i, | |
2408 | urb->iso_frame_desc[i].offset, | |
2409 | urb->iso_frame_desc[i].length); | |
2410 | ||
2411 | urb->hcpriv = dwc2_urb; | |
2412 | retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, &ep->hcpriv, | |
2413 | mem_flags); | |
2414 | if (retval) { | |
2415 | urb->hcpriv = NULL; | |
2416 | kfree(dwc2_urb); | |
2417 | } else { | |
2418 | if (alloc_bandwidth) { | |
2419 | spin_lock_irqsave(&hsotg->lock, flags); | |
2420 | dwc2_allocate_bus_bandwidth(hcd, | |
2421 | dwc2_hcd_get_ep_bandwidth(hsotg, ep), | |
2422 | urb); | |
2423 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2424 | } | |
2425 | } | |
2426 | ||
2427 | return retval; | |
2428 | } | |
2429 | ||
2430 | /* | |
2431 | * Aborts/cancels a USB transfer request. Always returns 0 to indicate success. | |
2432 | */ | |
2433 | static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, | |
2434 | int status) | |
2435 | { | |
2436 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2437 | int rc = 0; | |
2438 | unsigned long flags; | |
2439 | ||
2440 | dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n"); | |
2441 | dwc2_dump_urb_info(hcd, urb, "urb_dequeue"); | |
2442 | ||
2443 | spin_lock_irqsave(&hsotg->lock, flags); | |
2444 | ||
2445 | if (!urb->hcpriv) { | |
2446 | dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n"); | |
2447 | goto out; | |
2448 | } | |
2449 | ||
2450 | rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv); | |
2451 | ||
2452 | kfree(urb->hcpriv); | |
2453 | urb->hcpriv = NULL; | |
2454 | ||
2455 | /* Higher layer software sets URB status */ | |
2456 | spin_unlock(&hsotg->lock); | |
2457 | usb_hcd_giveback_urb(hcd, urb, status); | |
2458 | spin_lock(&hsotg->lock); | |
2459 | ||
2460 | dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n"); | |
2461 | dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status); | |
2462 | out: | |
2463 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2464 | ||
2465 | return rc; | |
2466 | } | |
2467 | ||
2468 | /* | |
2469 | * Frees resources in the DWC_otg controller related to a given endpoint. Also | |
2470 | * clears state in the HCD related to the endpoint. Any URBs for the endpoint | |
2471 | * must already be dequeued. | |
2472 | */ | |
2473 | static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd, | |
2474 | struct usb_host_endpoint *ep) | |
2475 | { | |
2476 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2477 | ||
2478 | dev_dbg(hsotg->dev, | |
2479 | "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n", | |
2480 | ep->desc.bEndpointAddress, ep->hcpriv); | |
2481 | dwc2_hcd_endpoint_disable(hsotg, ep, 250); | |
2482 | } | |
2483 | ||
2484 | /* | |
2485 | * Resets endpoint specific parameter values, in current version used to reset | |
2486 | * the data toggle (as a WA). This function can be called from usb_clear_halt | |
2487 | * routine. | |
2488 | */ | |
2489 | static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd, | |
2490 | struct usb_host_endpoint *ep) | |
2491 | { | |
2492 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2493 | int is_control = usb_endpoint_xfer_control(&ep->desc); | |
2494 | int is_out = usb_endpoint_dir_out(&ep->desc); | |
2495 | int epnum = usb_endpoint_num(&ep->desc); | |
2496 | struct usb_device *udev; | |
2497 | unsigned long flags; | |
2498 | ||
2499 | dev_dbg(hsotg->dev, | |
2500 | "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n", | |
2501 | ep->desc.bEndpointAddress); | |
2502 | ||
2503 | udev = to_usb_device(hsotg->dev); | |
2504 | ||
2505 | spin_lock_irqsave(&hsotg->lock, flags); | |
2506 | ||
2507 | usb_settoggle(udev, epnum, is_out, 0); | |
2508 | if (is_control) | |
2509 | usb_settoggle(udev, epnum, !is_out, 0); | |
2510 | dwc2_hcd_endpoint_reset(hsotg, ep); | |
2511 | ||
2512 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2513 | } | |
2514 | ||
2515 | /* | |
2516 | * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if | |
2517 | * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid | |
2518 | * interrupt. | |
2519 | * | |
2520 | * This function is called by the USB core when an interrupt occurs | |
2521 | */ | |
2522 | static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd) | |
2523 | { | |
2524 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2525 | int retval = dwc2_hcd_intr(hsotg); | |
2526 | ||
2527 | return IRQ_RETVAL(retval); | |
2528 | } | |
2529 | ||
2530 | /* | |
2531 | * Creates Status Change bitmap for the root hub and root port. The bitmap is | |
2532 | * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1 | |
2533 | * is the status change indicator for the single root port. Returns 1 if either | |
2534 | * change indicator is 1, otherwise returns 0. | |
2535 | */ | |
2536 | static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf) | |
2537 | { | |
2538 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2539 | ||
2540 | buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1; | |
2541 | return buf[0] != 0; | |
2542 | } | |
2543 | ||
2544 | /* Handles hub class-specific requests */ | |
2545 | static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue, | |
2546 | u16 windex, char *buf, u16 wlength) | |
2547 | { | |
2548 | int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq, | |
2549 | wvalue, windex, buf, wlength); | |
2550 | return retval; | |
2551 | } | |
2552 | ||
2553 | /* Handles hub TT buffer clear completions */ | |
2554 | static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd, | |
2555 | struct usb_host_endpoint *ep) | |
2556 | { | |
2557 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
2558 | struct dwc2_qh *qh; | |
2559 | unsigned long flags; | |
2560 | ||
2561 | qh = ep->hcpriv; | |
2562 | if (!qh) | |
2563 | return; | |
2564 | ||
2565 | spin_lock_irqsave(&hsotg->lock, flags); | |
2566 | qh->tt_buffer_dirty = 0; | |
2567 | ||
2568 | if (hsotg->flags.b.port_connect_status) | |
2569 | dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL); | |
2570 | ||
2571 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2572 | } | |
2573 | ||
2574 | static struct hc_driver dwc2_hc_driver = { | |
2575 | .description = "dwc2_hsotg", | |
2576 | .product_desc = "DWC OTG Controller", | |
2577 | .hcd_priv_size = sizeof(struct wrapper_priv_data), | |
2578 | ||
2579 | .irq = _dwc2_hcd_irq, | |
2580 | .flags = HCD_MEMORY | HCD_USB2, | |
2581 | ||
2582 | .start = _dwc2_hcd_start, | |
2583 | .stop = _dwc2_hcd_stop, | |
2584 | .urb_enqueue = _dwc2_hcd_urb_enqueue, | |
2585 | .urb_dequeue = _dwc2_hcd_urb_dequeue, | |
2586 | .endpoint_disable = _dwc2_hcd_endpoint_disable, | |
2587 | .endpoint_reset = _dwc2_hcd_endpoint_reset, | |
2588 | .get_frame_number = _dwc2_hcd_get_frame_number, | |
2589 | ||
2590 | .hub_status_data = _dwc2_hcd_hub_status_data, | |
2591 | .hub_control = _dwc2_hcd_hub_control, | |
2592 | .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete, | |
2593 | }; | |
2594 | ||
2595 | /* | |
2596 | * Frees secondary storage associated with the dwc2_hsotg structure contained | |
2597 | * in the struct usb_hcd field | |
2598 | */ | |
2599 | static void dwc2_hcd_free(struct dwc2_hsotg *hsotg) | |
2600 | { | |
2601 | u32 ahbcfg; | |
2602 | u32 dctl; | |
2603 | int i; | |
2604 | ||
2605 | dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n"); | |
2606 | ||
2607 | /* Free memory for QH/QTD lists */ | |
2608 | dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive); | |
2609 | dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active); | |
2610 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive); | |
2611 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready); | |
2612 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned); | |
2613 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued); | |
2614 | ||
2615 | /* Free memory for the host channels */ | |
2616 | for (i = 0; i < MAX_EPS_CHANNELS; i++) { | |
2617 | struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i]; | |
2618 | ||
2619 | if (chan != NULL) { | |
2620 | dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n", | |
2621 | i, chan); | |
2622 | hsotg->hc_ptr_array[i] = NULL; | |
2623 | kfree(chan); | |
2624 | } | |
2625 | } | |
2626 | ||
2627 | if (hsotg->core_params->dma_enable > 0) { | |
2628 | if (hsotg->status_buf) { | |
2629 | dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE, | |
2630 | hsotg->status_buf, | |
2631 | hsotg->status_buf_dma); | |
2632 | hsotg->status_buf = NULL; | |
2633 | } | |
2634 | } else { | |
2635 | kfree(hsotg->status_buf); | |
2636 | hsotg->status_buf = NULL; | |
2637 | } | |
2638 | ||
2639 | ahbcfg = readl(hsotg->regs + GAHBCFG); | |
2640 | ||
2641 | /* Disable all interrupts */ | |
2642 | ahbcfg &= ~GAHBCFG_GLBL_INTR_EN; | |
2643 | writel(ahbcfg, hsotg->regs + GAHBCFG); | |
2644 | writel(0, hsotg->regs + GINTMSK); | |
2645 | ||
2646 | if (hsotg->snpsid >= DWC2_CORE_REV_3_00a) { | |
2647 | dctl = readl(hsotg->regs + DCTL); | |
2648 | dctl |= DCTL_SFTDISCON; | |
2649 | writel(dctl, hsotg->regs + DCTL); | |
2650 | } | |
2651 | ||
2652 | if (hsotg->wq_otg) { | |
2653 | if (!cancel_work_sync(&hsotg->wf_otg)) | |
2654 | flush_workqueue(hsotg->wq_otg); | |
2655 | destroy_workqueue(hsotg->wq_otg); | |
2656 | } | |
2657 | ||
2658 | kfree(hsotg->core_params); | |
2659 | hsotg->core_params = NULL; | |
2660 | del_timer(&hsotg->wkp_timer); | |
2661 | } | |
2662 | ||
2663 | static void dwc2_hcd_release(struct dwc2_hsotg *hsotg) | |
2664 | { | |
2665 | /* Turn off all host-specific interrupts */ | |
2666 | dwc2_disable_host_interrupts(hsotg); | |
2667 | ||
2668 | dwc2_hcd_free(hsotg); | |
2669 | } | |
2670 | ||
2671 | static void dwc2_set_uninitialized(int *p, int size) | |
2672 | { | |
2673 | int i; | |
2674 | ||
2675 | for (i = 0; i < size; i++) | |
2676 | p[i] = -1; | |
2677 | } | |
2678 | ||
2679 | /* | |
2680 | * Initializes the HCD. This function allocates memory for and initializes the | |
2681 | * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the | |
2682 | * USB bus with the core and calls the hc_driver->start() function. It returns | |
2683 | * a negative error on failure. | |
2684 | */ | |
2685 | int dwc2_hcd_init(struct device *dev, struct dwc2_hsotg *hsotg, int irq, | |
2686 | struct dwc2_core_params *params) | |
2687 | { | |
2688 | struct usb_hcd *hcd; | |
2689 | struct dwc2_host_chan *channel; | |
2690 | u32 snpsid, gusbcfg, hcfg; | |
2691 | int i, num_channels; | |
2692 | int retval = -ENOMEM; | |
2693 | ||
2694 | dev_dbg(dev, "DWC OTG HCD INIT\n"); | |
2695 | ||
2696 | /* | |
2697 | * Attempt to ensure this device is really a DWC_otg Controller. | |
2698 | * Read and verify the GSNPSID register contents. The value should be | |
2699 | * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3", | |
2700 | * as in "OTG version 2.xx" or "OTG version 3.xx". | |
2701 | */ | |
2702 | snpsid = readl(hsotg->regs + GSNPSID); | |
2703 | if ((snpsid & 0xfffff000) != 0x4f542000 && | |
2704 | (snpsid & 0xfffff000) != 0x4f543000) { | |
2705 | dev_err(dev, "Bad value for GSNPSID: 0x%08x\n", snpsid); | |
2706 | retval = -ENODEV; | |
2707 | goto error1; | |
2708 | } | |
2709 | ||
2710 | hcd = usb_create_hcd(&dwc2_hc_driver, dev, dev_name(dev)); | |
2711 | if (!hcd) | |
2712 | goto error1; | |
2713 | ||
2714 | hcd->has_tt = 1; | |
2715 | ||
2716 | spin_lock_init(&hsotg->lock); | |
2717 | ((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg; | |
2718 | hsotg->priv = hcd; | |
2719 | hsotg->dev = dev; | |
2720 | ||
2721 | /* | |
2722 | * Store the contents of the hardware configuration registers here for | |
2723 | * easy access later | |
2724 | */ | |
2725 | hsotg->hwcfg1 = readl(hsotg->regs + GHWCFG1); | |
2726 | hsotg->hwcfg2 = readl(hsotg->regs + GHWCFG2); | |
2727 | hsotg->hwcfg3 = readl(hsotg->regs + GHWCFG3); | |
2728 | hsotg->hwcfg4 = readl(hsotg->regs + GHWCFG4); | |
2729 | ||
2730 | dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hsotg->hwcfg1); | |
2731 | dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hsotg->hwcfg2); | |
2732 | dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hsotg->hwcfg3); | |
2733 | dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hsotg->hwcfg4); | |
2734 | ||
2735 | /* Force host mode to get HPTXFSIZ exact power on value */ | |
2736 | gusbcfg = readl(hsotg->regs + GUSBCFG); | |
2737 | gusbcfg |= GUSBCFG_FORCEHOSTMODE; | |
2738 | writel(gusbcfg, hsotg->regs + GUSBCFG); | |
2739 | usleep_range(100000, 150000); | |
2740 | ||
2741 | hsotg->hptxfsiz = readl(hsotg->regs + HPTXFSIZ); | |
2742 | dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hsotg->hptxfsiz); | |
2743 | gusbcfg = readl(hsotg->regs + GUSBCFG); | |
2744 | gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; | |
2745 | writel(gusbcfg, hsotg->regs + GUSBCFG); | |
2746 | usleep_range(100000, 150000); | |
2747 | ||
2748 | hcfg = readl(hsotg->regs + HCFG); | |
2749 | dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg); | |
2750 | dev_dbg(hsotg->dev, "op_mode=%0x\n", | |
2751 | hsotg->hwcfg2 >> GHWCFG2_OP_MODE_SHIFT & | |
2752 | GHWCFG2_OP_MODE_MASK >> GHWCFG2_OP_MODE_SHIFT); | |
2753 | dev_dbg(hsotg->dev, "arch=%0x\n", | |
2754 | hsotg->hwcfg2 >> GHWCFG2_ARCHITECTURE_SHIFT & | |
2755 | GHWCFG2_ARCHITECTURE_MASK >> GHWCFG2_ARCHITECTURE_SHIFT); | |
2756 | dev_dbg(hsotg->dev, "num_dev_ep=%d\n", | |
2757 | hsotg->hwcfg2 >> GHWCFG2_NUM_DEV_EP_SHIFT & | |
2758 | GHWCFG2_NUM_DEV_EP_MASK >> GHWCFG2_NUM_DEV_EP_SHIFT); | |
2759 | dev_dbg(hsotg->dev, "max_host_chan=%d\n", | |
2760 | hsotg->hwcfg2 >> GHWCFG2_NUM_HOST_CHAN_SHIFT & | |
2761 | GHWCFG2_NUM_HOST_CHAN_MASK >> GHWCFG2_NUM_HOST_CHAN_SHIFT); | |
2762 | dev_dbg(hsotg->dev, "nonperio_tx_q_depth=0x%0x\n", | |
2763 | hsotg->hwcfg2 >> GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT & | |
2764 | GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK >> | |
2765 | GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT); | |
2766 | dev_dbg(hsotg->dev, "host_perio_tx_q_depth=0x%0x\n", | |
2767 | hsotg->hwcfg2 >> GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT & | |
2768 | GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK >> | |
2769 | GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT); | |
2770 | dev_dbg(hsotg->dev, "dev_token_q_depth=0x%0x\n", | |
2771 | hsotg->hwcfg2 >> GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT & | |
2772 | GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK >> | |
2773 | GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT); | |
2774 | ||
2775 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
2776 | hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) * | |
2777 | FRAME_NUM_ARRAY_SIZE, GFP_KERNEL); | |
2778 | if (!hsotg->frame_num_array) | |
2779 | goto error2; | |
2780 | hsotg->last_frame_num_array = kzalloc( | |
2781 | sizeof(*hsotg->last_frame_num_array) * | |
2782 | FRAME_NUM_ARRAY_SIZE, GFP_KERNEL); | |
2783 | if (!hsotg->last_frame_num_array) | |
2784 | goto error2; | |
2785 | hsotg->last_frame_num = HFNUM_MAX_FRNUM; | |
2786 | #endif | |
2787 | ||
2788 | hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL); | |
2789 | if (!hsotg->core_params) | |
2790 | goto error2; | |
2791 | ||
2792 | dwc2_set_uninitialized((int *)hsotg->core_params, | |
2793 | sizeof(*hsotg->core_params) / sizeof(int)); | |
2794 | ||
2795 | /* Validate parameter values */ | |
2796 | dwc2_set_parameters(hsotg, params); | |
2797 | ||
2798 | /* Initialize the DWC_otg core, and select the Phy type */ | |
2799 | retval = dwc2_core_init(hsotg, true); | |
2800 | if (retval) | |
2801 | goto error2; | |
2802 | ||
2803 | /* | |
2804 | * Disable the global interrupt until all the interrupt handlers are | |
2805 | * installed | |
2806 | */ | |
2807 | dwc2_disable_global_interrupts(hsotg); | |
2808 | ||
2809 | /* Create new workqueue and init work */ | |
2810 | hsotg->wq_otg = create_singlethread_workqueue("dwc_otg"); | |
2811 | if (!hsotg->wq_otg) { | |
2812 | dev_err(hsotg->dev, "Failed to create workqueue\n"); | |
2813 | goto error2; | |
2814 | } | |
2815 | INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change); | |
2816 | ||
2817 | hsotg->snpsid = readl(hsotg->regs + GSNPSID); | |
2818 | dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x\n", | |
2819 | hsotg->snpsid >> 12 & 0xf, hsotg->snpsid >> 8 & 0xf, | |
2820 | hsotg->snpsid >> 4 & 0xf, hsotg->snpsid & 0xf); | |
2821 | ||
2822 | setup_timer(&hsotg->wkp_timer, dwc2_wakeup_detected, | |
2823 | (unsigned long)hsotg); | |
2824 | ||
2825 | /* Initialize the non-periodic schedule */ | |
2826 | INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive); | |
2827 | INIT_LIST_HEAD(&hsotg->non_periodic_sched_active); | |
2828 | ||
2829 | /* Initialize the periodic schedule */ | |
2830 | INIT_LIST_HEAD(&hsotg->periodic_sched_inactive); | |
2831 | INIT_LIST_HEAD(&hsotg->periodic_sched_ready); | |
2832 | INIT_LIST_HEAD(&hsotg->periodic_sched_assigned); | |
2833 | INIT_LIST_HEAD(&hsotg->periodic_sched_queued); | |
2834 | ||
2835 | /* | |
2836 | * Create a host channel descriptor for each host channel implemented | |
2837 | * in the controller. Initialize the channel descriptor array. | |
2838 | */ | |
2839 | INIT_LIST_HEAD(&hsotg->free_hc_list); | |
2840 | num_channels = hsotg->core_params->host_channels; | |
2841 | memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array)); | |
2842 | ||
2843 | for (i = 0; i < num_channels; i++) { | |
2844 | channel = kzalloc(sizeof(*channel), GFP_KERNEL); | |
2845 | if (channel == NULL) | |
2846 | goto error3; | |
2847 | channel->hc_num = i; | |
2848 | hsotg->hc_ptr_array[i] = channel; | |
2849 | } | |
2850 | ||
2851 | /* Initialize hsotg start work */ | |
2852 | INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func); | |
2853 | ||
2854 | /* Initialize port reset work */ | |
2855 | INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func); | |
2856 | ||
2857 | /* | |
2858 | * Allocate space for storing data on status transactions. Normally no | |
2859 | * data is sent, but this space acts as a bit bucket. This must be | |
2860 | * done after usb_add_hcd since that function allocates the DMA buffer | |
2861 | * pool. | |
2862 | */ | |
2863 | if (hsotg->core_params->dma_enable > 0) | |
2864 | hsotg->status_buf = dma_alloc_coherent(hsotg->dev, | |
2865 | DWC2_HCD_STATUS_BUF_SIZE, | |
2866 | &hsotg->status_buf_dma, GFP_KERNEL); | |
2867 | else | |
2868 | hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE, | |
2869 | GFP_KERNEL); | |
2870 | ||
2871 | if (!hsotg->status_buf) | |
2872 | goto error3; | |
2873 | ||
2874 | hsotg->otg_port = 1; | |
2875 | hsotg->frame_list = NULL; | |
2876 | hsotg->frame_list_dma = 0; | |
2877 | hsotg->periodic_qh_count = 0; | |
2878 | ||
2879 | /* Initiate lx_state to L3 disconnected state */ | |
2880 | hsotg->lx_state = DWC2_L3; | |
2881 | ||
2882 | hcd->self.otg_port = hsotg->otg_port; | |
2883 | ||
2884 | /* Don't support SG list at this point */ | |
2885 | hcd->self.sg_tablesize = 0; | |
2886 | ||
2887 | /* | |
2888 | * Finish generic HCD initialization and start the HCD. This function | |
2889 | * allocates the DMA buffer pool, registers the USB bus, requests the | |
2890 | * IRQ line, and calls hcd_start method. | |
2891 | */ | |
2892 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); | |
2893 | if (retval < 0) | |
2894 | goto error3; | |
2895 | ||
2896 | dwc2_dump_global_registers(hsotg); | |
2897 | dwc2_dump_host_registers(hsotg); | |
2898 | dwc2_hcd_dump_state(hsotg); | |
2899 | ||
2900 | dwc2_enable_global_interrupts(hsotg); | |
2901 | ||
2902 | return 0; | |
2903 | ||
2904 | error3: | |
2905 | dwc2_hcd_release(hsotg); | |
2906 | error2: | |
2907 | kfree(hsotg->core_params); | |
2908 | ||
2909 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
2910 | kfree(hsotg->last_frame_num_array); | |
2911 | kfree(hsotg->frame_num_array); | |
2912 | #endif | |
2913 | ||
2914 | usb_put_hcd(hcd); | |
2915 | error1: | |
2916 | dev_err(dev, "%s() FAILED, returning %d\n", __func__, retval); | |
2917 | return retval; | |
2918 | } | |
2919 | EXPORT_SYMBOL_GPL(dwc2_hcd_init); | |
2920 | ||
2921 | /* | |
2922 | * Removes the HCD. | |
2923 | * Frees memory and resources associated with the HCD and deregisters the bus. | |
2924 | */ | |
2925 | void dwc2_hcd_remove(struct device *dev, struct dwc2_hsotg *hsotg) | |
2926 | { | |
2927 | struct usb_hcd *hcd; | |
2928 | ||
2929 | dev_dbg(dev, "DWC OTG HCD REMOVE\n"); | |
2930 | ||
2931 | hcd = dwc2_hsotg_to_hcd(hsotg); | |
2932 | dev_dbg(dev, "hsotg->hcd = %p\n", hcd); | |
2933 | ||
2934 | if (!hcd) { | |
2935 | dev_dbg(dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n", | |
2936 | __func__); | |
2937 | return; | |
2938 | } | |
2939 | ||
2940 | usb_remove_hcd(hcd); | |
2941 | hsotg->priv = NULL; | |
2942 | dwc2_hcd_release(hsotg); | |
7359d482 PZ |
2943 | |
2944 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
2945 | kfree(hsotg->last_frame_num_array); | |
2946 | kfree(hsotg->frame_num_array); | |
2947 | #endif | |
2948 | ||
2949 | usb_put_hcd(hcd); | |
2950 | } | |
2951 | EXPORT_SYMBOL_GPL(dwc2_hcd_remove); |