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Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux
[linux-2.6.git] / drivers / staging / dwc2 / hcd.c
blob2ed54b172a3b11308fb15e834d6742f13a150b90
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 if (dbg_qh(qh))
729 dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh);
730
731 if (list_empty(&qh->qtd_list)) {
732 dev_dbg(hsotg->dev, "No QTDs in QH list\n");
733 return;
734 }
735
736 if (list_empty(&hsotg->free_hc_list)) {
737 dev_dbg(hsotg->dev, "No free channel to assign\n");
738 return;
739 }
740
741 chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan,
742 hc_list_entry);
743
744 /* Remove the host channel from the free list */
745 list_del_init(&chan->hc_list_entry);
746
747 qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry);
748 urb = qtd->urb;
749 qh->channel = chan;
750 qtd->in_process = 1;
751
752 /*
753 * Use usb_pipedevice to determine device address. This address is
754 * 0 before the SET_ADDRESS command and the correct address afterward.
755 */
756 chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info);
757 chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info);
758 chan->speed = qh->dev_speed;
759 chan->max_packet = dwc2_max_packet(qh->maxp);
760
761 chan->xfer_started = 0;
762 chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS;
763 chan->error_state = (qtd->error_count > 0);
764 chan->halt_on_queue = 0;
765 chan->halt_pending = 0;
766 chan->requests = 0;
767
768 /*
769 * The following values may be modified in the transfer type section
770 * below. The xfer_len value may be reduced when the transfer is
771 * started to accommodate the max widths of the XferSize and PktCnt
772 * fields in the HCTSIZn register.
773 */
774
775 chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0);
776 if (chan->ep_is_in)
777 chan->do_ping = 0;
778 else
779 chan->do_ping = qh->ping_state;
780
781 chan->data_pid_start = qh->data_toggle;
782 chan->multi_count = 1;
783
784 if (hsotg->core_params->dma_enable > 0) {
785 chan->xfer_dma = urb->dma + urb->actual_length;
786
787 /* For non-dword aligned case */
788 if (hsotg->core_params->dma_desc_enable <= 0 &&
789 (chan->xfer_dma & 0x3))
790 bufptr = (u8 *)urb->buf + urb->actual_length;
791 } else {
792 chan->xfer_buf = (u8 *)urb->buf + urb->actual_length;
793 }
794
795 chan->xfer_len = urb->length - urb->actual_length;
796 chan->xfer_count = 0;
797
798 /* Set the split attributes if required */
799 if (qh->do_split)
800 dwc2_hc_init_split(hsotg, chan, qtd, urb);
801 else
802 chan->do_split = 0;
803
804 /* Set the transfer attributes */
805 bufptr = dwc2_hc_init_xfer(hsotg, chan, qtd, bufptr);
806
807 /* Non DWORD-aligned buffer case */
808 if (bufptr) {
809 dev_vdbg(hsotg->dev, "Non-aligned buffer\n");
810 if (dwc2_hc_setup_align_buf(hsotg, qh, chan, bufptr)) {
811 dev_err(hsotg->dev,
812 "%s: Failed to allocate memory to handle non-dword aligned buffer\n",
813 __func__);
814 /* Add channel back to free list */
815 chan->align_buf = 0;
816 chan->multi_count = 0;
817 list_add_tail(&chan->hc_list_entry,
818 &hsotg->free_hc_list);
819 qtd->in_process = 0;
820 qh->channel = NULL;
821 return;
822 }
823 } else {
824 chan->align_buf = 0;
825 }
826
827 if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
828 chan->ep_type == USB_ENDPOINT_XFER_ISOC)
829 /*
830 * This value may be modified when the transfer is started
831 * to reflect the actual transfer length
832 */
833 chan->multi_count = dwc2_hb_mult(qh->maxp);
834
835 if (hsotg->core_params->dma_desc_enable > 0)
836 chan->desc_list_addr = qh->desc_list_dma;
837
838 dwc2_hc_init(hsotg, chan);
839 chan->qh = qh;
840 }
841
842 /**
843 * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer
844 * schedule and assigns them to available host channels. Called from the HCD
845 * interrupt handler functions.
846 *
847 * @hsotg: The HCD state structure
848 *
849 * Return: The types of new transactions that were assigned to host channels
850 */
851 enum dwc2_transaction_type dwc2_hcd_select_transactions(
852 struct dwc2_hsotg *hsotg)
853 {
854 enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE;
855 struct list_head *qh_ptr;
856 struct dwc2_qh *qh;
857 int num_channels;
858
859 #ifdef DWC2_DEBUG_SOF
860 dev_vdbg(hsotg->dev, " Select Transactions\n");
861 #endif
862
863 /* Process entries in the periodic ready list */
864 qh_ptr = hsotg->periodic_sched_ready.next;
865 while (qh_ptr != &hsotg->periodic_sched_ready) {
866 if (list_empty(&hsotg->free_hc_list))
867 break;
868 qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
869 dwc2_assign_and_init_hc(hsotg, qh);
870
871 /*
872 * Move the QH from the periodic ready schedule to the
873 * periodic assigned schedule
874 */
875 qh_ptr = qh_ptr->next;
876 list_move(&qh->qh_list_entry, &hsotg->periodic_sched_assigned);
877 ret_val = DWC2_TRANSACTION_PERIODIC;
878 }
879
880 /*
881 * Process entries in the inactive portion of the non-periodic
882 * schedule. Some free host channels may not be used if they are
883 * reserved for periodic transfers.
884 */
885 num_channels = hsotg->core_params->host_channels;
886 qh_ptr = hsotg->non_periodic_sched_inactive.next;
887 while (qh_ptr != &hsotg->non_periodic_sched_inactive) {
888 if (hsotg->non_periodic_channels >= num_channels -
889 hsotg->periodic_channels)
890 break;
891 if (list_empty(&hsotg->free_hc_list))
892 break;
893 qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
894 dwc2_assign_and_init_hc(hsotg, qh);
895
896 /*
897 * Move the QH from the non-periodic inactive schedule to the
898 * non-periodic active schedule
899 */
900 qh_ptr = qh_ptr->next;
901 list_move(&qh->qh_list_entry,
902 &hsotg->non_periodic_sched_active);
903
904 if (ret_val == DWC2_TRANSACTION_NONE)
905 ret_val = DWC2_TRANSACTION_NON_PERIODIC;
906 else
907 ret_val = DWC2_TRANSACTION_ALL;
908
909 hsotg->non_periodic_channels++;
910 }
911
912 return ret_val;
913 }
914
915 /**
916 * dwc2_queue_transaction() - Attempts to queue a single transaction request for
917 * a host channel associated with either a periodic or non-periodic transfer
918 *
919 * @hsotg: The HCD state structure
920 * @chan: Host channel descriptor associated with either a periodic or
921 * non-periodic transfer
922 * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO
923 * for periodic transfers or the non-periodic Tx FIFO
924 * for non-periodic transfers
925 *
926 * Return: 1 if a request is queued and more requests may be needed to
927 * complete the transfer, 0 if no more requests are required for this
928 * transfer, -1 if there is insufficient space in the Tx FIFO
929 *
930 * This function assumes that there is space available in the appropriate
931 * request queue. For an OUT transfer or SETUP transaction in Slave mode,
932 * it checks whether space is available in the appropriate Tx FIFO.
933 *
934 * Must be called with interrupt disabled and spinlock held
935 */
936 static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg,
937 struct dwc2_host_chan *chan,
938 u16 fifo_dwords_avail)
939 {
940 int retval = 0;
941
942 if (hsotg->core_params->dma_enable > 0) {
943 if (hsotg->core_params->dma_desc_enable > 0) {
944 if (!chan->xfer_started ||
945 chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
946 dwc2_hcd_start_xfer_ddma(hsotg, chan->qh);
947 chan->qh->ping_state = 0;
948 }
949 } else if (!chan->xfer_started) {
950 dwc2_hc_start_transfer(hsotg, chan);
951 chan->qh->ping_state = 0;
952 }
953 } else if (chan->halt_pending) {
954 /* Don't queue a request if the channel has been halted */
955 } else if (chan->halt_on_queue) {
956 dwc2_hc_halt(hsotg, chan, chan->halt_status);
957 } else if (chan->do_ping) {
958 if (!chan->xfer_started)
959 dwc2_hc_start_transfer(hsotg, chan);
960 } else if (!chan->ep_is_in ||
961 chan->data_pid_start == DWC2_HC_PID_SETUP) {
962 if ((fifo_dwords_avail * 4) >= chan->max_packet) {
963 if (!chan->xfer_started) {
964 dwc2_hc_start_transfer(hsotg, chan);
965 retval = 1;
966 } else {
967 retval = dwc2_hc_continue_transfer(hsotg, chan);
968 }
969 } else {
970 retval = -1;
971 }
972 } else {
973 if (!chan->xfer_started) {
974 dwc2_hc_start_transfer(hsotg, chan);
975 retval = 1;
976 } else {
977 retval = dwc2_hc_continue_transfer(hsotg, chan);
978 }
979 }
980
981 return retval;
982 }
983
984 /*
985 * Processes periodic channels for the next frame and queues transactions for
986 * these channels to the DWC_otg controller. After queueing transactions, the
987 * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions
988 * to queue as Periodic Tx FIFO or request queue space becomes available.
989 * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled.
990 *
991 * Must be called with interrupt disabled and spinlock held
992 */
993 static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
994 {
995 struct list_head *qh_ptr;
996 struct dwc2_qh *qh;
997 u32 tx_status;
998 u32 fspcavail;
999 u32 gintmsk;
1000 int status;
1001 int no_queue_space = 0;
1002 int no_fifo_space = 0;
1003 u32 qspcavail;
1004
1005 if (dbg_perio())
1006 dev_vdbg(hsotg->dev, "Queue periodic transactions\n");
1007
1008 tx_status = readl(hsotg->regs + HPTXSTS);
1009 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1010 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1011 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1012 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1013
1014 if (dbg_perio()) {
1015 dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n",
1016 qspcavail);
1017 dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n",
1018 fspcavail);
1019 }
1020
1021 qh_ptr = hsotg->periodic_sched_assigned.next;
1022 while (qh_ptr != &hsotg->periodic_sched_assigned) {
1023 tx_status = readl(hsotg->regs + HPTXSTS);
1024 if ((tx_status & TXSTS_QSPCAVAIL_MASK) == 0) {
1025 no_queue_space = 1;
1026 break;
1027 }
1028
1029 qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
1030 if (!qh->channel) {
1031 qh_ptr = qh_ptr->next;
1032 continue;
1033 }
1034
1035 /* Make sure EP's TT buffer is clean before queueing qtds */
1036 if (qh->tt_buffer_dirty) {
1037 qh_ptr = qh_ptr->next;
1038 continue;
1039 }
1040
1041 /*
1042 * Set a flag if we're queuing high-bandwidth in slave mode.
1043 * The flag prevents any halts to get into the request queue in
1044 * the middle of multiple high-bandwidth packets getting queued.
1045 */
1046 if (hsotg->core_params->dma_enable <= 0 &&
1047 qh->channel->multi_count > 1)
1048 hsotg->queuing_high_bandwidth = 1;
1049
1050 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1051 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1052 status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
1053 if (status < 0) {
1054 no_fifo_space = 1;
1055 break;
1056 }
1057
1058 /*
1059 * In Slave mode, stay on the current transfer until there is
1060 * nothing more to do or the high-bandwidth request count is
1061 * reached. In DMA mode, only need to queue one request. The
1062 * controller automatically handles multiple packets for
1063 * high-bandwidth transfers.
1064 */
1065 if (hsotg->core_params->dma_enable > 0 || status == 0 ||
1066 qh->channel->requests == qh->channel->multi_count) {
1067 qh_ptr = qh_ptr->next;
1068 /*
1069 * Move the QH from the periodic assigned schedule to
1070 * the periodic queued schedule
1071 */
1072 list_move(&qh->qh_list_entry,
1073 &hsotg->periodic_sched_queued);
1074
1075 /* done queuing high bandwidth */
1076 hsotg->queuing_high_bandwidth = 0;
1077 }
1078 }
1079
1080 if (hsotg->core_params->dma_enable <= 0) {
1081 tx_status = readl(hsotg->regs + HPTXSTS);
1082 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1083 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1084 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1085 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1086 if (dbg_perio()) {
1087 dev_vdbg(hsotg->dev,
1088 " P Tx Req Queue Space Avail (after queue): %d\n",
1089 qspcavail);
1090 dev_vdbg(hsotg->dev,
1091 " P Tx FIFO Space Avail (after queue): %d\n",
1092 fspcavail);
1093 }
1094
1095 if (!list_empty(&hsotg->periodic_sched_assigned) ||
1096 no_queue_space || no_fifo_space) {
1097 /*
1098 * May need to queue more transactions as the request
1099 * queue or Tx FIFO empties. Enable the periodic Tx
1100 * FIFO empty interrupt. (Always use the half-empty
1101 * level to ensure that new requests are loaded as
1102 * soon as possible.)
1103 */
1104 gintmsk = readl(hsotg->regs + GINTMSK);
1105 gintmsk |= GINTSTS_PTXFEMP;
1106 writel(gintmsk, hsotg->regs + GINTMSK);
1107 } else {
1108 /*
1109 * Disable the Tx FIFO empty interrupt since there are
1110 * no more transactions that need to be queued right
1111 * now. This function is called from interrupt
1112 * handlers to queue more transactions as transfer
1113 * states change.
1114 */
1115 gintmsk = readl(hsotg->regs + GINTMSK);
1116 gintmsk &= ~GINTSTS_PTXFEMP;
1117 writel(gintmsk, hsotg->regs + GINTMSK);
1118 }
1119 }
1120 }
1121
1122 /*
1123 * Processes active non-periodic channels and queues transactions for these
1124 * channels to the DWC_otg controller. After queueing transactions, the NP Tx
1125 * FIFO Empty interrupt is enabled if there are more transactions to queue as
1126 * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx
1127 * FIFO Empty interrupt is disabled.
1128 *
1129 * Must be called with interrupt disabled and spinlock held
1130 */
1131 static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg)
1132 {
1133 struct list_head *orig_qh_ptr;
1134 struct dwc2_qh *qh;
1135 u32 tx_status;
1136 u32 qspcavail;
1137 u32 fspcavail;
1138 u32 gintmsk;
1139 int status;
1140 int no_queue_space = 0;
1141 int no_fifo_space = 0;
1142 int more_to_do = 0;
1143
1144 dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n");
1145
1146 tx_status = readl(hsotg->regs + GNPTXSTS);
1147 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1148 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1149 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1150 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1151 dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n",
1152 qspcavail);
1153 dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n",
1154 fspcavail);
1155
1156 /*
1157 * Keep track of the starting point. Skip over the start-of-list
1158 * entry.
1159 */
1160 if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active)
1161 hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
1162 orig_qh_ptr = hsotg->non_periodic_qh_ptr;
1163
1164 /*
1165 * Process once through the active list or until no more space is
1166 * available in the request queue or the Tx FIFO
1167 */
1168 do {
1169 tx_status = readl(hsotg->regs + GNPTXSTS);
1170 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1171 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1172 if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) {
1173 no_queue_space = 1;
1174 break;
1175 }
1176
1177 qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh,
1178 qh_list_entry);
1179 if (!qh->channel)
1180 goto next;
1181
1182 /* Make sure EP's TT buffer is clean before queueing qtds */
1183 if (qh->tt_buffer_dirty)
1184 goto next;
1185
1186 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1187 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1188 status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
1189
1190 if (status > 0) {
1191 more_to_do = 1;
1192 } else if (status < 0) {
1193 no_fifo_space = 1;
1194 break;
1195 }
1196 next:
1197 /* Advance to next QH, skipping start-of-list entry */
1198 hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
1199 if (hsotg->non_periodic_qh_ptr ==
1200 &hsotg->non_periodic_sched_active)
1201 hsotg->non_periodic_qh_ptr =
1202 hsotg->non_periodic_qh_ptr->next;
1203 } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr);
1204
1205 if (hsotg->core_params->dma_enable <= 0) {
1206 tx_status = readl(hsotg->regs + GNPTXSTS);
1207 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1208 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1209 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1210 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1211 dev_vdbg(hsotg->dev,
1212 " NP Tx Req Queue Space Avail (after queue): %d\n",
1213 qspcavail);
1214 dev_vdbg(hsotg->dev,
1215 " NP Tx FIFO Space Avail (after queue): %d\n",
1216 fspcavail);
1217
1218 if (more_to_do || no_queue_space || no_fifo_space) {
1219 /*
1220 * May need to queue more transactions as the request
1221 * queue or Tx FIFO empties. Enable the non-periodic
1222 * Tx FIFO empty interrupt. (Always use the half-empty
1223 * level to ensure that new requests are loaded as
1224 * soon as possible.)
1225 */
1226 gintmsk = readl(hsotg->regs + GINTMSK);
1227 gintmsk |= GINTSTS_NPTXFEMP;
1228 writel(gintmsk, hsotg->regs + GINTMSK);
1229 } else {
1230 /*
1231 * Disable the Tx FIFO empty interrupt since there are
1232 * no more transactions that need to be queued right
1233 * now. This function is called from interrupt
1234 * handlers to queue more transactions as transfer
1235 * states change.
1236 */
1237 gintmsk = readl(hsotg->regs + GINTMSK);
1238 gintmsk &= ~GINTSTS_NPTXFEMP;
1239 writel(gintmsk, hsotg->regs + GINTMSK);
1240 }
1241 }
1242 }
1243
1244 /**
1245 * dwc2_hcd_queue_transactions() - Processes the currently active host channels
1246 * and queues transactions for these channels to the DWC_otg controller. Called
1247 * from the HCD interrupt handler functions.
1248 *
1249 * @hsotg: The HCD state structure
1250 * @tr_type: The type(s) of transactions to queue (non-periodic, periodic,
1251 * or both)
1252 *
1253 * Must be called with interrupt disabled and spinlock held
1254 */
1255 void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
1256 enum dwc2_transaction_type tr_type)
1257 {
1258 #ifdef DWC2_DEBUG_SOF
1259 dev_vdbg(hsotg->dev, "Queue Transactions\n");
1260 #endif
1261 /* Process host channels associated with periodic transfers */
1262 if ((tr_type == DWC2_TRANSACTION_PERIODIC ||
1263 tr_type == DWC2_TRANSACTION_ALL) &&
1264 !list_empty(&hsotg->periodic_sched_assigned))
1265 dwc2_process_periodic_channels(hsotg);
1266
1267 /* Process host channels associated with non-periodic transfers */
1268 if (tr_type == DWC2_TRANSACTION_NON_PERIODIC ||
1269 tr_type == DWC2_TRANSACTION_ALL) {
1270 if (!list_empty(&hsotg->non_periodic_sched_active)) {
1271 dwc2_process_non_periodic_channels(hsotg);
1272 } else {
1273 /*
1274 * Ensure NP Tx FIFO empty interrupt is disabled when
1275 * there are no non-periodic transfers to process
1276 */
1277 u32 gintmsk = readl(hsotg->regs + GINTMSK);
1278
1279 gintmsk &= ~GINTSTS_NPTXFEMP;
1280 writel(gintmsk, hsotg->regs + GINTMSK);
1281 }
1282 }
1283 }
1284
1285 static void dwc2_conn_id_status_change(struct work_struct *work)
1286 {
1287 struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
1288 wf_otg);
1289 u32 count = 0;
1290 u32 gotgctl;
1291
1292 dev_dbg(hsotg->dev, "%s()\n", __func__);
1293
1294 gotgctl = readl(hsotg->regs + GOTGCTL);
1295 dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl);
1296 dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n",
1297 !!(gotgctl & GOTGCTL_CONID_B));
1298
1299 /* B-Device connector (Device Mode) */
1300 if (gotgctl & GOTGCTL_CONID_B) {
1301 /* Wait for switch to device mode */
1302 dev_dbg(hsotg->dev, "connId B\n");
1303 while (!dwc2_is_device_mode(hsotg)) {
1304 dev_info(hsotg->dev,
1305 "Waiting for Peripheral Mode, Mode=%s\n",
1306 dwc2_is_host_mode(hsotg) ? "Host" :
1307 "Peripheral");
1308 usleep_range(20000, 40000);
1309 if (++count > 250)
1310 break;
1311 }
1312 if (count > 250)
1313 dev_err(hsotg->dev,
1314 "Connection id status change timed out\n");
1315 hsotg->op_state = OTG_STATE_B_PERIPHERAL;
1316 dwc2_core_init(hsotg, false, -1);
1317 dwc2_enable_global_interrupts(hsotg);
1318 } else {
1319 /* A-Device connector (Host Mode) */
1320 dev_dbg(hsotg->dev, "connId A\n");
1321 while (!dwc2_is_host_mode(hsotg)) {
1322 dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n",
1323 dwc2_is_host_mode(hsotg) ?
1324 "Host" : "Peripheral");
1325 usleep_range(20000, 40000);
1326 if (++count > 250)
1327 break;
1328 }
1329 if (count > 250)
1330 dev_err(hsotg->dev,
1331 "Connection id status change timed out\n");
1332 hsotg->op_state = OTG_STATE_A_HOST;
1333
1334 /* Initialize the Core for Host mode */
1335 dwc2_core_init(hsotg, false, -1);
1336 dwc2_enable_global_interrupts(hsotg);
1337 dwc2_hcd_start(hsotg);
1338 }
1339 }
1340
1341 static void dwc2_wakeup_detected(unsigned long data)
1342 {
1343 struct dwc2_hsotg *hsotg = (struct dwc2_hsotg *)data;
1344 u32 hprt0;
1345
1346 dev_dbg(hsotg->dev, "%s()\n", __func__);
1347
1348 /*
1349 * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms
1350 * so that OPT tests pass with all PHYs.)
1351 */
1352 hprt0 = dwc2_read_hprt0(hsotg);
1353 dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0);
1354 hprt0 &= ~HPRT0_RES;
1355 writel(hprt0, hsotg->regs + HPRT0);
1356 dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n",
1357 readl(hsotg->regs + HPRT0));
1358
1359 dwc2_hcd_rem_wakeup(hsotg);
1360
1361 /* Change to L0 state */
1362 hsotg->lx_state = DWC2_L0;
1363 }
1364
1365 static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg)
1366 {
1367 struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
1368
1369 return hcd->self.b_hnp_enable;
1370 }
1371
1372 /* Must NOT be called with interrupt disabled or spinlock held */
1373 static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
1374 {
1375 unsigned long flags;
1376 u32 hprt0;
1377 u32 pcgctl;
1378 u32 gotgctl;
1379
1380 dev_dbg(hsotg->dev, "%s()\n", __func__);
1381
1382 spin_lock_irqsave(&hsotg->lock, flags);
1383
1384 if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) {
1385 gotgctl = readl(hsotg->regs + GOTGCTL);
1386 gotgctl |= GOTGCTL_HSTSETHNPEN;
1387 writel(gotgctl, hsotg->regs + GOTGCTL);
1388 hsotg->op_state = OTG_STATE_A_SUSPEND;
1389 }
1390
1391 hprt0 = dwc2_read_hprt0(hsotg);
1392 hprt0 |= HPRT0_SUSP;
1393 writel(hprt0, hsotg->regs + HPRT0);
1394
1395 /* Update lx_state */
1396 hsotg->lx_state = DWC2_L2;
1397
1398 /* Suspend the Phy Clock */
1399 pcgctl = readl(hsotg->regs + PCGCTL);
1400 pcgctl |= PCGCTL_STOPPCLK;
1401 writel(pcgctl, hsotg->regs + PCGCTL);
1402 udelay(10);
1403
1404 /* For HNP the bus must be suspended for at least 200ms */
1405 if (dwc2_host_is_b_hnp_enabled(hsotg)) {
1406 pcgctl = readl(hsotg->regs + PCGCTL);
1407 pcgctl &= ~PCGCTL_STOPPCLK;
1408 writel(pcgctl, hsotg->regs + PCGCTL);
1409
1410 spin_unlock_irqrestore(&hsotg->lock, flags);
1411
1412 usleep_range(200000, 250000);
1413 } else {
1414 spin_unlock_irqrestore(&hsotg->lock, flags);
1415 }
1416 }
1417
1418 /* Handles hub class-specific requests */
1419 static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
1420 u16 wvalue, u16 windex, char *buf, u16 wlength)
1421 {
1422 struct usb_hub_descriptor *hub_desc;
1423 int retval = 0;
1424 u32 hprt0;
1425 u32 port_status;
1426 u32 speed;
1427 u32 pcgctl;
1428
1429 switch (typereq) {
1430 case ClearHubFeature:
1431 dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue);
1432
1433 switch (wvalue) {
1434 case C_HUB_LOCAL_POWER:
1435 case C_HUB_OVER_CURRENT:
1436 /* Nothing required here */
1437 break;
1438
1439 default:
1440 retval = -EINVAL;
1441 dev_err(hsotg->dev,
1442 "ClearHubFeature request %1xh unknown\n",
1443 wvalue);
1444 }
1445 break;
1446
1447 case ClearPortFeature:
1448 if (wvalue != USB_PORT_FEAT_L1)
1449 if (!windex || windex > 1)
1450 goto error;
1451 switch (wvalue) {
1452 case USB_PORT_FEAT_ENABLE:
1453 dev_dbg(hsotg->dev,
1454 "ClearPortFeature USB_PORT_FEAT_ENABLE\n");
1455 hprt0 = dwc2_read_hprt0(hsotg);
1456 hprt0 |= HPRT0_ENA;
1457 writel(hprt0, hsotg->regs + HPRT0);
1458 break;
1459
1460 case USB_PORT_FEAT_SUSPEND:
1461 dev_dbg(hsotg->dev,
1462 "ClearPortFeature USB_PORT_FEAT_SUSPEND\n");
1463 writel(0, hsotg->regs + PCGCTL);
1464 usleep_range(20000, 40000);
1465
1466 hprt0 = dwc2_read_hprt0(hsotg);
1467 hprt0 |= HPRT0_RES;
1468 writel(hprt0, hsotg->regs + HPRT0);
1469 hprt0 &= ~HPRT0_SUSP;
1470 usleep_range(100000, 150000);
1471
1472 hprt0 &= ~HPRT0_RES;
1473 writel(hprt0, hsotg->regs + HPRT0);
1474 break;
1475
1476 case USB_PORT_FEAT_POWER:
1477 dev_dbg(hsotg->dev,
1478 "ClearPortFeature USB_PORT_FEAT_POWER\n");
1479 hprt0 = dwc2_read_hprt0(hsotg);
1480 hprt0 &= ~HPRT0_PWR;
1481 writel(hprt0, hsotg->regs + HPRT0);
1482 break;
1483
1484 case USB_PORT_FEAT_INDICATOR:
1485 dev_dbg(hsotg->dev,
1486 "ClearPortFeature USB_PORT_FEAT_INDICATOR\n");
1487 /* Port indicator not supported */
1488 break;
1489
1490 case USB_PORT_FEAT_C_CONNECTION:
1491 /*
1492 * Clears driver's internal Connect Status Change flag
1493 */
1494 dev_dbg(hsotg->dev,
1495 "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n");
1496 hsotg->flags.b.port_connect_status_change = 0;
1497 break;
1498
1499 case USB_PORT_FEAT_C_RESET:
1500 /* Clears driver's internal Port Reset Change flag */
1501 dev_dbg(hsotg->dev,
1502 "ClearPortFeature USB_PORT_FEAT_C_RESET\n");
1503 hsotg->flags.b.port_reset_change = 0;
1504 break;
1505
1506 case USB_PORT_FEAT_C_ENABLE:
1507 /*
1508 * Clears the driver's internal Port Enable/Disable
1509 * Change flag
1510 */
1511 dev_dbg(hsotg->dev,
1512 "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n");
1513 hsotg->flags.b.port_enable_change = 0;
1514 break;
1515
1516 case USB_PORT_FEAT_C_SUSPEND:
1517 /*
1518 * Clears the driver's internal Port Suspend Change
1519 * flag, which is set when resume signaling on the host
1520 * port is complete
1521 */
1522 dev_dbg(hsotg->dev,
1523 "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n");
1524 hsotg->flags.b.port_suspend_change = 0;
1525 break;
1526
1527 case USB_PORT_FEAT_C_PORT_L1:
1528 dev_dbg(hsotg->dev,
1529 "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n");
1530 hsotg->flags.b.port_l1_change = 0;
1531 break;
1532
1533 case USB_PORT_FEAT_C_OVER_CURRENT:
1534 dev_dbg(hsotg->dev,
1535 "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n");
1536 hsotg->flags.b.port_over_current_change = 0;
1537 break;
1538
1539 default:
1540 retval = -EINVAL;
1541 dev_err(hsotg->dev,
1542 "ClearPortFeature request %1xh unknown or unsupported\n",
1543 wvalue);
1544 }
1545 break;
1546
1547 case GetHubDescriptor:
1548 dev_dbg(hsotg->dev, "GetHubDescriptor\n");
1549 hub_desc = (struct usb_hub_descriptor *)buf;
1550 hub_desc->bDescLength = 9;
1551 hub_desc->bDescriptorType = 0x29;
1552 hub_desc->bNbrPorts = 1;
1553 hub_desc->wHubCharacteristics = cpu_to_le16(0x08);
1554 hub_desc->bPwrOn2PwrGood = 1;
1555 hub_desc->bHubContrCurrent = 0;
1556 hub_desc->u.hs.DeviceRemovable[0] = 0;
1557 hub_desc->u.hs.DeviceRemovable[1] = 0xff;
1558 break;
1559
1560 case GetHubStatus:
1561 dev_dbg(hsotg->dev, "GetHubStatus\n");
1562 memset(buf, 0, 4);
1563 break;
1564
1565 case GetPortStatus:
1566 dev_vdbg(hsotg->dev,
1567 "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex,
1568 hsotg->flags.d32);
1569 if (!windex || windex > 1)
1570 goto error;
1571
1572 port_status = 0;
1573 if (hsotg->flags.b.port_connect_status_change)
1574 port_status |= USB_PORT_STAT_C_CONNECTION << 16;
1575 if (hsotg->flags.b.port_enable_change)
1576 port_status |= USB_PORT_STAT_C_ENABLE << 16;
1577 if (hsotg->flags.b.port_suspend_change)
1578 port_status |= USB_PORT_STAT_C_SUSPEND << 16;
1579 if (hsotg->flags.b.port_l1_change)
1580 port_status |= USB_PORT_STAT_C_L1 << 16;
1581 if (hsotg->flags.b.port_reset_change)
1582 port_status |= USB_PORT_STAT_C_RESET << 16;
1583 if (hsotg->flags.b.port_over_current_change) {
1584 dev_warn(hsotg->dev, "Overcurrent change detected\n");
1585 port_status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1586 }
1587
1588 if (!hsotg->flags.b.port_connect_status) {
1589 /*
1590 * The port is disconnected, which means the core is
1591 * either in device mode or it soon will be. Just
1592 * return 0's for the remainder of the port status
1593 * since the port register can't be read if the core
1594 * is in device mode.
1595 */
1596 *(__le32 *)buf = cpu_to_le32(port_status);
1597 break;
1598 }
1599
1600 hprt0 = readl(hsotg->regs + HPRT0);
1601 dev_vdbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0);
1602
1603 if (hprt0 & HPRT0_CONNSTS)
1604 port_status |= USB_PORT_STAT_CONNECTION;
1605 if (hprt0 & HPRT0_ENA)
1606 port_status |= USB_PORT_STAT_ENABLE;
1607 if (hprt0 & HPRT0_SUSP)
1608 port_status |= USB_PORT_STAT_SUSPEND;
1609 if (hprt0 & HPRT0_OVRCURRACT)
1610 port_status |= USB_PORT_STAT_OVERCURRENT;
1611 if (hprt0 & HPRT0_RST)
1612 port_status |= USB_PORT_STAT_RESET;
1613 if (hprt0 & HPRT0_PWR)
1614 port_status |= USB_PORT_STAT_POWER;
1615
1616 speed = hprt0 & HPRT0_SPD_MASK;
1617 if (speed == HPRT0_SPD_HIGH_SPEED)
1618 port_status |= USB_PORT_STAT_HIGH_SPEED;
1619 else if (speed == HPRT0_SPD_LOW_SPEED)
1620 port_status |= USB_PORT_STAT_LOW_SPEED;
1621
1622 if (hprt0 & HPRT0_TSTCTL_MASK)
1623 port_status |= USB_PORT_STAT_TEST;
1624 /* USB_PORT_FEAT_INDICATOR unsupported always 0 */
1625
1626 dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status);
1627 *(__le32 *)buf = cpu_to_le32(port_status);
1628 break;
1629
1630 case SetHubFeature:
1631 dev_dbg(hsotg->dev, "SetHubFeature\n");
1632 /* No HUB features supported */
1633 break;
1634
1635 case SetPortFeature:
1636 dev_dbg(hsotg->dev, "SetPortFeature\n");
1637 if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1))
1638 goto error;
1639
1640 if (!hsotg->flags.b.port_connect_status) {
1641 /*
1642 * The port is disconnected, which means the core is
1643 * either in device mode or it soon will be. Just
1644 * return without doing anything since the port
1645 * register can't be written if the core is in device
1646 * mode.
1647 */
1648 break;
1649 }
1650
1651 switch (wvalue) {
1652 case USB_PORT_FEAT_SUSPEND:
1653 dev_dbg(hsotg->dev,
1654 "SetPortFeature - USB_PORT_FEAT_SUSPEND\n");
1655 if (windex != hsotg->otg_port)
1656 goto error;
1657 dwc2_port_suspend(hsotg, windex);
1658 break;
1659
1660 case USB_PORT_FEAT_POWER:
1661 dev_dbg(hsotg->dev,
1662 "SetPortFeature - USB_PORT_FEAT_POWER\n");
1663 hprt0 = dwc2_read_hprt0(hsotg);
1664 hprt0 |= HPRT0_PWR;
1665 writel(hprt0, hsotg->regs + HPRT0);
1666 break;
1667
1668 case USB_PORT_FEAT_RESET:
1669 hprt0 = dwc2_read_hprt0(hsotg);
1670 dev_dbg(hsotg->dev,
1671 "SetPortFeature - USB_PORT_FEAT_RESET\n");
1672 pcgctl = readl(hsotg->regs + PCGCTL);
1673 pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK);
1674 writel(pcgctl, hsotg->regs + PCGCTL);
1675 /* ??? Original driver does this */
1676 writel(0, hsotg->regs + PCGCTL);
1677
1678 hprt0 = dwc2_read_hprt0(hsotg);
1679 /* Clear suspend bit if resetting from suspend state */
1680 hprt0 &= ~HPRT0_SUSP;
1681
1682 /*
1683 * When B-Host the Port reset bit is set in the Start
1684 * HCD Callback function, so that the reset is started
1685 * within 1ms of the HNP success interrupt
1686 */
1687 if (!dwc2_hcd_is_b_host(hsotg)) {
1688 hprt0 |= HPRT0_PWR | HPRT0_RST;
1689 dev_dbg(hsotg->dev,
1690 "In host mode, hprt0=%08x\n", hprt0);
1691 writel(hprt0, hsotg->regs + HPRT0);
1692 }
1693
1694 /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
1695 usleep_range(50000, 70000);
1696 hprt0 &= ~HPRT0_RST;
1697 writel(hprt0, hsotg->regs + HPRT0);
1698 hsotg->lx_state = DWC2_L0; /* Now back to On state */
1699 break;
1700
1701 case USB_PORT_FEAT_INDICATOR:
1702 dev_dbg(hsotg->dev,
1703 "SetPortFeature - USB_PORT_FEAT_INDICATOR\n");
1704 /* Not supported */
1705 break;
1706
1707 default:
1708 retval = -EINVAL;
1709 dev_err(hsotg->dev,
1710 "SetPortFeature %1xh unknown or unsupported\n",
1711 wvalue);
1712 break;
1713 }
1714 break;
1715
1716 default:
1717 error:
1718 retval = -EINVAL;
1719 dev_dbg(hsotg->dev,
1720 "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n",
1721 typereq, windex, wvalue);
1722 break;
1723 }
1724
1725 return retval;
1726 }
1727
1728 static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port)
1729 {
1730 int retval;
1731
1732 if (port != 1)
1733 return -EINVAL;
1734
1735 retval = (hsotg->flags.b.port_connect_status_change ||
1736 hsotg->flags.b.port_reset_change ||
1737 hsotg->flags.b.port_enable_change ||
1738 hsotg->flags.b.port_suspend_change ||
1739 hsotg->flags.b.port_over_current_change);
1740
1741 if (retval) {
1742 dev_dbg(hsotg->dev,
1743 "DWC OTG HCD HUB STATUS DATA: Root port status changed\n");
1744 dev_dbg(hsotg->dev, " port_connect_status_change: %d\n",
1745 hsotg->flags.b.port_connect_status_change);
1746 dev_dbg(hsotg->dev, " port_reset_change: %d\n",
1747 hsotg->flags.b.port_reset_change);
1748 dev_dbg(hsotg->dev, " port_enable_change: %d\n",
1749 hsotg->flags.b.port_enable_change);
1750 dev_dbg(hsotg->dev, " port_suspend_change: %d\n",
1751 hsotg->flags.b.port_suspend_change);
1752 dev_dbg(hsotg->dev, " port_over_current_change: %d\n",
1753 hsotg->flags.b.port_over_current_change);
1754 }
1755
1756 return retval;
1757 }
1758
1759 int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg)
1760 {
1761 u32 hfnum = readl(hsotg->regs + HFNUM);
1762
1763 #ifdef DWC2_DEBUG_SOF
1764 dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n",
1765 hfnum >> HFNUM_FRNUM_SHIFT &
1766 HFNUM_FRNUM_MASK >> HFNUM_FRNUM_SHIFT);
1767 #endif
1768 return hfnum >> HFNUM_FRNUM_SHIFT &
1769 HFNUM_FRNUM_MASK >> HFNUM_FRNUM_SHIFT;
1770 }
1771
1772 int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg)
1773 {
1774 return (hsotg->op_state == OTG_STATE_B_HOST);
1775 }
1776
1777 static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg,
1778 int iso_desc_count,
1779 gfp_t mem_flags)
1780 {
1781 struct dwc2_hcd_urb *urb;
1782 u32 size = sizeof(*urb) + iso_desc_count *
1783 sizeof(struct dwc2_hcd_iso_packet_desc);
1784
1785 urb = kzalloc(size, mem_flags);
1786 if (urb)
1787 urb->packet_count = iso_desc_count;
1788 return urb;
1789 }
1790
1791 static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg,
1792 struct dwc2_hcd_urb *urb, u8 dev_addr,
1793 u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps)
1794 {
1795 if (dbg_perio() ||
1796 ep_type == USB_ENDPOINT_XFER_BULK ||
1797 ep_type == USB_ENDPOINT_XFER_CONTROL)
1798 dev_vdbg(hsotg->dev,
1799 "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n",
1800 dev_addr, ep_num, ep_dir, ep_type, mps);
1801 urb->pipe_info.dev_addr = dev_addr;
1802 urb->pipe_info.ep_num = ep_num;
1803 urb->pipe_info.pipe_type = ep_type;
1804 urb->pipe_info.pipe_dir = ep_dir;
1805 urb->pipe_info.mps = mps;
1806 }
1807
1808 /*
1809 * NOTE: This function will be removed once the peripheral controller code
1810 * is integrated and the driver is stable
1811 */
1812 void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg)
1813 {
1814 #ifdef DEBUG
1815 struct dwc2_host_chan *chan;
1816 struct dwc2_hcd_urb *urb;
1817 struct dwc2_qtd *qtd;
1818 int num_channels;
1819 u32 np_tx_status;
1820 u32 p_tx_status;
1821 int i;
1822
1823 num_channels = hsotg->core_params->host_channels;
1824 dev_dbg(hsotg->dev, "\n");
1825 dev_dbg(hsotg->dev,
1826 "************************************************************\n");
1827 dev_dbg(hsotg->dev, "HCD State:\n");
1828 dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels);
1829
1830 for (i = 0; i < num_channels; i++) {
1831 chan = hsotg->hc_ptr_array[i];
1832 dev_dbg(hsotg->dev, " Channel %d:\n", i);
1833 dev_dbg(hsotg->dev,
1834 " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
1835 chan->dev_addr, chan->ep_num, chan->ep_is_in);
1836 dev_dbg(hsotg->dev, " speed: %d\n", chan->speed);
1837 dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
1838 dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
1839 dev_dbg(hsotg->dev, " data_pid_start: %d\n",
1840 chan->data_pid_start);
1841 dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count);
1842 dev_dbg(hsotg->dev, " xfer_started: %d\n",
1843 chan->xfer_started);
1844 dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
1845 dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
1846 (unsigned long)chan->xfer_dma);
1847 dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
1848 dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count);
1849 dev_dbg(hsotg->dev, " halt_on_queue: %d\n",
1850 chan->halt_on_queue);
1851 dev_dbg(hsotg->dev, " halt_pending: %d\n",
1852 chan->halt_pending);
1853 dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
1854 dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split);
1855 dev_dbg(hsotg->dev, " complete_split: %d\n",
1856 chan->complete_split);
1857 dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr);
1858 dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port);
1859 dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos);
1860 dev_dbg(hsotg->dev, " requests: %d\n", chan->requests);
1861 dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
1862
1863 if (chan->xfer_started) {
1864 u32 hfnum, hcchar, hctsiz, hcint, hcintmsk;
1865
1866 hfnum = readl(hsotg->regs + HFNUM);
1867 hcchar = readl(hsotg->regs + HCCHAR(i));
1868 hctsiz = readl(hsotg->regs + HCTSIZ(i));
1869 hcint = readl(hsotg->regs + HCINT(i));
1870 hcintmsk = readl(hsotg->regs + HCINTMSK(i));
1871 dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum);
1872 dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar);
1873 dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz);
1874 dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint);
1875 dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk);
1876 }
1877
1878 if (!(chan->xfer_started && chan->qh))
1879 continue;
1880
1881 list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) {
1882 if (!qtd->in_process)
1883 break;
1884 urb = qtd->urb;
1885 dev_dbg(hsotg->dev, " URB Info:\n");
1886 dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n",
1887 qtd, urb);
1888 if (urb) {
1889 dev_dbg(hsotg->dev,
1890 " Dev: %d, EP: %d %s\n",
1891 dwc2_hcd_get_dev_addr(&urb->pipe_info),
1892 dwc2_hcd_get_ep_num(&urb->pipe_info),
1893 dwc2_hcd_is_pipe_in(&urb->pipe_info) ?
1894 "IN" : "OUT");
1895 dev_dbg(hsotg->dev,
1896 " Max packet size: %d\n",
1897 dwc2_hcd_get_mps(&urb->pipe_info));
1898 dev_dbg(hsotg->dev,
1899 " transfer_buffer: %p\n",
1900 urb->buf);
1901 dev_dbg(hsotg->dev,
1902 " transfer_dma: %08lx\n",
1903 (unsigned long)urb->dma);
1904 dev_dbg(hsotg->dev,
1905 " transfer_buffer_length: %d\n",
1906 urb->length);
1907 dev_dbg(hsotg->dev, " actual_length: %d\n",
1908 urb->actual_length);
1909 }
1910 }
1911 }
1912
1913 dev_dbg(hsotg->dev, " non_periodic_channels: %d\n",
1914 hsotg->non_periodic_channels);
1915 dev_dbg(hsotg->dev, " periodic_channels: %d\n",
1916 hsotg->periodic_channels);
1917 dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs);
1918 np_tx_status = readl(hsotg->regs + GNPTXSTS);
1919 dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n",
1920 np_tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1921 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT);
1922 dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n",
1923 np_tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1924 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT);
1925 p_tx_status = readl(hsotg->regs + HPTXSTS);
1926 dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n",
1927 p_tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1928 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT);
1929 dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n",
1930 p_tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1931 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT);
1932 dwc2_hcd_dump_frrem(hsotg);
1933 dwc2_dump_global_registers(hsotg);
1934 dwc2_dump_host_registers(hsotg);
1935 dev_dbg(hsotg->dev,
1936 "************************************************************\n");
1937 dev_dbg(hsotg->dev, "\n");
1938 #endif
1939 }
1940
1941 /*
1942 * NOTE: This function will be removed once the peripheral controller code
1943 * is integrated and the driver is stable
1944 */
1945 void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg)
1946 {
1947 #ifdef DWC2_DUMP_FRREM
1948 dev_dbg(hsotg->dev, "Frame remaining at SOF:\n");
1949 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1950 hsotg->frrem_samples, hsotg->frrem_accum,
1951 hsotg->frrem_samples > 0 ?
1952 hsotg->frrem_accum / hsotg->frrem_samples : 0);
1953 dev_dbg(hsotg->dev, "\n");
1954 dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n");
1955 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1956 hsotg->hfnum_7_samples,
1957 hsotg->hfnum_7_frrem_accum,
1958 hsotg->hfnum_7_samples > 0 ?
1959 hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0);
1960 dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n");
1961 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1962 hsotg->hfnum_0_samples,
1963 hsotg->hfnum_0_frrem_accum,
1964 hsotg->hfnum_0_samples > 0 ?
1965 hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0);
1966 dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n");
1967 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1968 hsotg->hfnum_other_samples,
1969 hsotg->hfnum_other_frrem_accum,
1970 hsotg->hfnum_other_samples > 0 ?
1971 hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples :
1972 0);
1973 dev_dbg(hsotg->dev, "\n");
1974 dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n");
1975 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1976 hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a,
1977 hsotg->hfnum_7_samples_a > 0 ?
1978 hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0);
1979 dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n");
1980 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1981 hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a,
1982 hsotg->hfnum_0_samples_a > 0 ?
1983 hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0);
1984 dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n");
1985 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1986 hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a,
1987 hsotg->hfnum_other_samples_a > 0 ?
1988 hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a
1989 : 0);
1990 dev_dbg(hsotg->dev, "\n");
1991 dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n");
1992 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1993 hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b,
1994 hsotg->hfnum_7_samples_b > 0 ?
1995 hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0);
1996 dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n");
1997 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1998 hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b,
1999 (hsotg->hfnum_0_samples_b > 0) ?
2000 hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0);
2001 dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n");
2002 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
2003 hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b,
2004 (hsotg->hfnum_other_samples_b > 0) ?
2005 hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b
2006 : 0);
2007 #endif
2008 }
2009
2010 struct wrapper_priv_data {
2011 struct dwc2_hsotg *hsotg;
2012 };
2013
2014 /* Gets the dwc2_hsotg from a usb_hcd */
2015 static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd)
2016 {
2017 struct wrapper_priv_data *p;
2018
2019 p = (struct wrapper_priv_data *) &hcd->hcd_priv;
2020 return p->hsotg;
2021 }
2022
2023 static int _dwc2_hcd_start(struct usb_hcd *hcd);
2024
2025 void dwc2_host_start(struct dwc2_hsotg *hsotg)
2026 {
2027 struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
2028
2029 hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg);
2030 _dwc2_hcd_start(hcd);
2031 }
2032
2033 void dwc2_host_disconnect(struct dwc2_hsotg *hsotg)
2034 {
2035 struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
2036
2037 hcd->self.is_b_host = 0;
2038 }
2039
2040 void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, int *hub_addr,
2041 int *hub_port)
2042 {
2043 struct urb *urb = context;
2044
2045 if (urb->dev->tt)
2046 *hub_addr = urb->dev->tt->hub->devnum;
2047 else
2048 *hub_addr = 0;
2049 *hub_port = urb->dev->ttport;
2050 }
2051
2052 int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context)
2053 {
2054 struct urb *urb = context;
2055
2056 return urb->dev->speed;
2057 }
2058
2059 static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
2060 struct urb *urb)
2061 {
2062 struct usb_bus *bus = hcd_to_bus(hcd);
2063
2064 if (urb->interval)
2065 bus->bandwidth_allocated += bw / urb->interval;
2066 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
2067 bus->bandwidth_isoc_reqs++;
2068 else
2069 bus->bandwidth_int_reqs++;
2070 }
2071
2072 static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
2073 struct urb *urb)
2074 {
2075 struct usb_bus *bus = hcd_to_bus(hcd);
2076
2077 if (urb->interval)
2078 bus->bandwidth_allocated -= bw / urb->interval;
2079 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
2080 bus->bandwidth_isoc_reqs--;
2081 else
2082 bus->bandwidth_int_reqs--;
2083 }
2084
2085 /*
2086 * Sets the final status of an URB and returns it to the upper layer. Any
2087 * required cleanup of the URB is performed.
2088 *
2089 * Must be called with interrupt disabled and spinlock held
2090 */
2091 void dwc2_host_complete(struct dwc2_hsotg *hsotg, void *context,
2092 struct dwc2_hcd_urb *dwc2_urb, int status)
2093 {
2094 struct urb *urb = context;
2095 int i;
2096
2097 if (!urb) {
2098 dev_dbg(hsotg->dev, "## %s: context is NULL ##\n", __func__);
2099 return;
2100 }
2101
2102 if (!dwc2_urb) {
2103 dev_dbg(hsotg->dev, "## %s: dwc2_urb is NULL ##\n", __func__);
2104 return;
2105 }
2106
2107 urb->actual_length = dwc2_hcd_urb_get_actual_length(dwc2_urb);
2108
2109 if (dbg_urb(urb))
2110 dev_vdbg(hsotg->dev,
2111 "%s: urb %p device %d ep %d-%s status %d actual %d\n",
2112 __func__, urb, usb_pipedevice(urb->pipe),
2113 usb_pipeendpoint(urb->pipe),
2114 usb_pipein(urb->pipe) ? "IN" : "OUT", status,
2115 urb->actual_length);
2116
2117 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS && dbg_perio()) {
2118 for (i = 0; i < urb->number_of_packets; i++)
2119 dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n",
2120 i, urb->iso_frame_desc[i].status);
2121 }
2122
2123 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
2124 urb->error_count = dwc2_hcd_urb_get_error_count(dwc2_urb);
2125 for (i = 0; i < urb->number_of_packets; ++i) {
2126 urb->iso_frame_desc[i].actual_length =
2127 dwc2_hcd_urb_get_iso_desc_actual_length(
2128 dwc2_urb, i);
2129 urb->iso_frame_desc[i].status =
2130 dwc2_hcd_urb_get_iso_desc_status(dwc2_urb, i);
2131 }
2132 }
2133
2134 urb->status = status;
2135 urb->hcpriv = NULL;
2136 if (!status) {
2137 if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
2138 urb->actual_length < urb->transfer_buffer_length)
2139 urb->status = -EREMOTEIO;
2140 }
2141
2142 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
2143 usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
2144 struct usb_host_endpoint *ep = urb->ep;
2145
2146 if (ep)
2147 dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg),
2148 dwc2_hcd_get_ep_bandwidth(hsotg, ep),
2149 urb);
2150 }
2151
2152 kfree(dwc2_urb);
2153
2154 spin_unlock(&hsotg->lock);
2155 usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status);
2156 spin_lock(&hsotg->lock);
2157 }
2158
2159 /*
2160 * Work queue function for starting the HCD when A-Cable is connected
2161 */
2162 static void dwc2_hcd_start_func(struct work_struct *work)
2163 {
2164 struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
2165 start_work.work);
2166
2167 dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg);
2168 dwc2_host_start(hsotg);
2169 }
2170
2171 /*
2172 * Reset work queue function
2173 */
2174 static void dwc2_hcd_reset_func(struct work_struct *work)
2175 {
2176 struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
2177 reset_work.work);
2178 u32 hprt0;
2179
2180 dev_dbg(hsotg->dev, "USB RESET function called\n");
2181 hprt0 = dwc2_read_hprt0(hsotg);
2182 hprt0 &= ~HPRT0_RST;
2183 writel(hprt0, hsotg->regs + HPRT0);
2184 hsotg->flags.b.port_reset_change = 1;
2185 }
2186
2187 /*
2188 * =========================================================================
2189 * Linux HC Driver Functions
2190 * =========================================================================
2191 */
2192
2193 /*
2194 * Initializes the DWC_otg controller and its root hub and prepares it for host
2195 * mode operation. Activates the root port. Returns 0 on success and a negative
2196 * error code on failure.
2197 */
2198 static int _dwc2_hcd_start(struct usb_hcd *hcd)
2199 {
2200 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2201 struct usb_bus *bus = hcd_to_bus(hcd);
2202 unsigned long flags;
2203
2204 dev_dbg(hsotg->dev, "DWC OTG HCD START\n");
2205
2206 spin_lock_irqsave(&hsotg->lock, flags);
2207
2208 hcd->state = HC_STATE_RUNNING;
2209
2210 if (dwc2_is_device_mode(hsotg)) {
2211 spin_unlock_irqrestore(&hsotg->lock, flags);
2212 return 0; /* why 0 ?? */
2213 }
2214
2215 dwc2_hcd_reinit(hsotg);
2216
2217 /* Initialize and connect root hub if one is not already attached */
2218 if (bus->root_hub) {
2219 dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n");
2220 /* Inform the HUB driver to resume */
2221 usb_hcd_resume_root_hub(hcd);
2222 }
2223
2224 spin_unlock_irqrestore(&hsotg->lock, flags);
2225 return 0;
2226 }
2227
2228 /*
2229 * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
2230 * stopped.
2231 */
2232 static void _dwc2_hcd_stop(struct usb_hcd *hcd)
2233 {
2234 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2235 unsigned long flags;
2236
2237 spin_lock_irqsave(&hsotg->lock, flags);
2238 dwc2_hcd_stop(hsotg);
2239 spin_unlock_irqrestore(&hsotg->lock, flags);
2240
2241 usleep_range(1000, 3000);
2242 }
2243
2244 /* Returns the current frame number */
2245 static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd)
2246 {
2247 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2248
2249 return dwc2_hcd_get_frame_number(hsotg);
2250 }
2251
2252 static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb,
2253 char *fn_name)
2254 {
2255 #ifdef VERBOSE_DEBUG
2256 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2257 char *pipetype;
2258 char *speed;
2259
2260 dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb);
2261 dev_vdbg(hsotg->dev, " Device address: %d\n",
2262 usb_pipedevice(urb->pipe));
2263 dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n",
2264 usb_pipeendpoint(urb->pipe),
2265 usb_pipein(urb->pipe) ? "IN" : "OUT");
2266
2267 switch (usb_pipetype(urb->pipe)) {
2268 case PIPE_CONTROL:
2269 pipetype = "CONTROL";
2270 break;
2271 case PIPE_BULK:
2272 pipetype = "BULK";
2273 break;
2274 case PIPE_INTERRUPT:
2275 pipetype = "INTERRUPT";
2276 break;
2277 case PIPE_ISOCHRONOUS:
2278 pipetype = "ISOCHRONOUS";
2279 break;
2280 default:
2281 pipetype = "UNKNOWN";
2282 break;
2283 }
2284
2285 dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype,
2286 usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ?
2287 "IN" : "OUT");
2288
2289 switch (urb->dev->speed) {
2290 case USB_SPEED_HIGH:
2291 speed = "HIGH";
2292 break;
2293 case USB_SPEED_FULL:
2294 speed = "FULL";
2295 break;
2296 case USB_SPEED_LOW:
2297 speed = "LOW";
2298 break;
2299 default:
2300 speed = "UNKNOWN";
2301 break;
2302 }
2303
2304 dev_vdbg(hsotg->dev, " Speed: %s\n", speed);
2305 dev_vdbg(hsotg->dev, " Max packet size: %d\n",
2306 usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)));
2307 dev_vdbg(hsotg->dev, " Data buffer length: %d\n",
2308 urb->transfer_buffer_length);
2309 dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n",
2310 urb->transfer_buffer, (unsigned long)urb->transfer_dma);
2311 dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n",
2312 urb->setup_packet, (unsigned long)urb->setup_dma);
2313 dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval);
2314
2315 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
2316 int i;
2317
2318 for (i = 0; i < urb->number_of_packets; i++) {
2319 dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i);
2320 dev_vdbg(hsotg->dev, " offset: %d, length %d\n",
2321 urb->iso_frame_desc[i].offset,
2322 urb->iso_frame_desc[i].length);
2323 }
2324 }
2325 #endif
2326 }
2327
2328 /*
2329 * Starts processing a USB transfer request specified by a USB Request Block
2330 * (URB). mem_flags indicates the type of memory allocation to use while
2331 * processing this URB.
2332 */
2333 static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
2334 gfp_t mem_flags)
2335 {
2336 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2337 struct usb_host_endpoint *ep = urb->ep;
2338 struct dwc2_hcd_urb *dwc2_urb;
2339 int i;
2340 int alloc_bandwidth = 0;
2341 int retval = 0;
2342 u8 ep_type = 0;
2343 u32 tflags = 0;
2344 void *buf;
2345 unsigned long flags;
2346
2347 if (dbg_urb(urb)) {
2348 dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n");
2349 dwc2_dump_urb_info(hcd, urb, "urb_enqueue");
2350 }
2351
2352 if (ep == NULL)
2353 return -EINVAL;
2354
2355 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
2356 usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
2357 spin_lock_irqsave(&hsotg->lock, flags);
2358 if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep))
2359 alloc_bandwidth = 1;
2360 spin_unlock_irqrestore(&hsotg->lock, flags);
2361 }
2362
2363 switch (usb_pipetype(urb->pipe)) {
2364 case PIPE_CONTROL:
2365 ep_type = USB_ENDPOINT_XFER_CONTROL;
2366 break;
2367 case PIPE_ISOCHRONOUS:
2368 ep_type = USB_ENDPOINT_XFER_ISOC;
2369 break;
2370 case PIPE_BULK:
2371 ep_type = USB_ENDPOINT_XFER_BULK;
2372 break;
2373 case PIPE_INTERRUPT:
2374 ep_type = USB_ENDPOINT_XFER_INT;
2375 break;
2376 default:
2377 dev_warn(hsotg->dev, "Wrong ep type\n");
2378 }
2379
2380 dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets,
2381 mem_flags);
2382 if (!dwc2_urb)
2383 return -ENOMEM;
2384
2385 dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe),
2386 usb_pipeendpoint(urb->pipe), ep_type,
2387 usb_pipein(urb->pipe),
2388 usb_maxpacket(urb->dev, urb->pipe,
2389 !(usb_pipein(urb->pipe))));
2390
2391 buf = urb->transfer_buffer;
2392 if (hcd->self.uses_dma) {
2393 /*
2394 * Calculate virtual address from physical address, because
2395 * some class driver may not fill transfer_buffer.
2396 * In Buffer DMA mode virtual address is used, when handling
2397 * non-DWORD aligned buffers.
2398 */
2399 buf = bus_to_virt(urb->transfer_dma);
2400 }
2401
2402 if (!(urb->transfer_flags & URB_NO_INTERRUPT))
2403 tflags |= URB_GIVEBACK_ASAP;
2404 if (urb->transfer_flags & URB_ZERO_PACKET)
2405 tflags |= URB_SEND_ZERO_PACKET;
2406
2407 dwc2_urb->priv = urb;
2408 dwc2_urb->buf = buf;
2409 dwc2_urb->dma = urb->transfer_dma;
2410 dwc2_urb->length = urb->transfer_buffer_length;
2411 dwc2_urb->setup_packet = urb->setup_packet;
2412 dwc2_urb->setup_dma = urb->setup_dma;
2413 dwc2_urb->flags = tflags;
2414 dwc2_urb->interval = urb->interval;
2415 dwc2_urb->status = -EINPROGRESS;
2416
2417 for (i = 0; i < urb->number_of_packets; ++i)
2418 dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i,
2419 urb->iso_frame_desc[i].offset,
2420 urb->iso_frame_desc[i].length);
2421
2422 urb->hcpriv = dwc2_urb;
2423 retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, &ep->hcpriv,
2424 mem_flags);
2425 if (retval) {
2426 urb->hcpriv = NULL;
2427 kfree(dwc2_urb);
2428 } else {
2429 if (alloc_bandwidth) {
2430 spin_lock_irqsave(&hsotg->lock, flags);
2431 dwc2_allocate_bus_bandwidth(hcd,
2432 dwc2_hcd_get_ep_bandwidth(hsotg, ep),
2433 urb);
2434 spin_unlock_irqrestore(&hsotg->lock, flags);
2435 }
2436 }
2437
2438 return retval;
2439 }
2440
2441 /*
2442 * Aborts/cancels a USB transfer request. Always returns 0 to indicate success.
2443 */
2444 static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
2445 int status)
2446 {
2447 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2448 int rc = 0;
2449 unsigned long flags;
2450
2451 dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n");
2452 dwc2_dump_urb_info(hcd, urb, "urb_dequeue");
2453
2454 spin_lock_irqsave(&hsotg->lock, flags);
2455
2456 if (!urb->hcpriv) {
2457 dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n");
2458 goto out;
2459 }
2460
2461 rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv);
2462
2463 kfree(urb->hcpriv);
2464 urb->hcpriv = NULL;
2465
2466 /* Higher layer software sets URB status */
2467 spin_unlock(&hsotg->lock);
2468 usb_hcd_giveback_urb(hcd, urb, status);
2469 spin_lock(&hsotg->lock);
2470
2471 dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n");
2472 dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status);
2473 out:
2474 spin_unlock_irqrestore(&hsotg->lock, flags);
2475
2476 return rc;
2477 }
2478
2479 /*
2480 * Frees resources in the DWC_otg controller related to a given endpoint. Also
2481 * clears state in the HCD related to the endpoint. Any URBs for the endpoint
2482 * must already be dequeued.
2483 */
2484 static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd,
2485 struct usb_host_endpoint *ep)
2486 {
2487 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2488
2489 dev_dbg(hsotg->dev,
2490 "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n",
2491 ep->desc.bEndpointAddress, ep->hcpriv);
2492 dwc2_hcd_endpoint_disable(hsotg, ep, 250);
2493 }
2494
2495 /*
2496 * Resets endpoint specific parameter values, in current version used to reset
2497 * the data toggle (as a WA). This function can be called from usb_clear_halt
2498 * routine.
2499 */
2500 static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd,
2501 struct usb_host_endpoint *ep)
2502 {
2503 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2504 int is_control = usb_endpoint_xfer_control(&ep->desc);
2505 int is_out = usb_endpoint_dir_out(&ep->desc);
2506 int epnum = usb_endpoint_num(&ep->desc);
2507 struct usb_device *udev;
2508 unsigned long flags;
2509
2510 dev_dbg(hsotg->dev,
2511 "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n",
2512 ep->desc.bEndpointAddress);
2513
2514 udev = to_usb_device(hsotg->dev);
2515
2516 spin_lock_irqsave(&hsotg->lock, flags);
2517
2518 usb_settoggle(udev, epnum, is_out, 0);
2519 if (is_control)
2520 usb_settoggle(udev, epnum, !is_out, 0);
2521 dwc2_hcd_endpoint_reset(hsotg, ep);
2522
2523 spin_unlock_irqrestore(&hsotg->lock, flags);
2524 }
2525
2526 /*
2527 * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
2528 * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid
2529 * interrupt.
2530 *
2531 * This function is called by the USB core when an interrupt occurs
2532 */
2533 static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd)
2534 {
2535 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2536
2537 return dwc2_handle_hcd_intr(hsotg);
2538 }
2539
2540 /*
2541 * Creates Status Change bitmap for the root hub and root port. The bitmap is
2542 * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1
2543 * is the status change indicator for the single root port. Returns 1 if either
2544 * change indicator is 1, otherwise returns 0.
2545 */
2546 static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
2547 {
2548 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2549
2550 buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1;
2551 return buf[0] != 0;
2552 }
2553
2554 /* Handles hub class-specific requests */
2555 static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue,
2556 u16 windex, char *buf, u16 wlength)
2557 {
2558 int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq,
2559 wvalue, windex, buf, wlength);
2560 return retval;
2561 }
2562
2563 /* Handles hub TT buffer clear completions */
2564 static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd,
2565 struct usb_host_endpoint *ep)
2566 {
2567 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2568 struct dwc2_qh *qh;
2569 unsigned long flags;
2570
2571 qh = ep->hcpriv;
2572 if (!qh)
2573 return;
2574
2575 spin_lock_irqsave(&hsotg->lock, flags);
2576 qh->tt_buffer_dirty = 0;
2577
2578 if (hsotg->flags.b.port_connect_status)
2579 dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL);
2580
2581 spin_unlock_irqrestore(&hsotg->lock, flags);
2582 }
2583
2584 static struct hc_driver dwc2_hc_driver = {
2585 .description = "dwc2_hsotg",
2586 .product_desc = "DWC OTG Controller",
2587 .hcd_priv_size = sizeof(struct wrapper_priv_data),
2588
2589 .irq = _dwc2_hcd_irq,
2590 .flags = HCD_MEMORY | HCD_USB2,
2591
2592 .start = _dwc2_hcd_start,
2593 .stop = _dwc2_hcd_stop,
2594 .urb_enqueue = _dwc2_hcd_urb_enqueue,
2595 .urb_dequeue = _dwc2_hcd_urb_dequeue,
2596 .endpoint_disable = _dwc2_hcd_endpoint_disable,
2597 .endpoint_reset = _dwc2_hcd_endpoint_reset,
2598 .get_frame_number = _dwc2_hcd_get_frame_number,
2599
2600 .hub_status_data = _dwc2_hcd_hub_status_data,
2601 .hub_control = _dwc2_hcd_hub_control,
2602 .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete,
2603 };
2604
2605 /*
2606 * Frees secondary storage associated with the dwc2_hsotg structure contained
2607 * in the struct usb_hcd field
2608 */
2609 static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
2610 {
2611 u32 ahbcfg;
2612 u32 dctl;
2613 int i;
2614
2615 dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n");
2616
2617 /* Free memory for QH/QTD lists */
2618 dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive);
2619 dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active);
2620 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive);
2621 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready);
2622 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned);
2623 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued);
2624
2625 /* Free memory for the host channels */
2626 for (i = 0; i < MAX_EPS_CHANNELS; i++) {
2627 struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
2628
2629 if (chan != NULL) {
2630 dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n",
2631 i, chan);
2632 hsotg->hc_ptr_array[i] = NULL;
2633 kfree(chan);
2634 }
2635 }
2636
2637 if (hsotg->core_params->dma_enable > 0) {
2638 if (hsotg->status_buf) {
2639 dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE,
2640 hsotg->status_buf,
2641 hsotg->status_buf_dma);
2642 hsotg->status_buf = NULL;
2643 }
2644 } else {
2645 kfree(hsotg->status_buf);
2646 hsotg->status_buf = NULL;
2647 }
2648
2649 ahbcfg = readl(hsotg->regs + GAHBCFG);
2650
2651 /* Disable all interrupts */
2652 ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
2653 writel(ahbcfg, hsotg->regs + GAHBCFG);
2654 writel(0, hsotg->regs + GINTMSK);
2655
2656 if (hsotg->snpsid >= DWC2_CORE_REV_3_00a) {
2657 dctl = readl(hsotg->regs + DCTL);
2658 dctl |= DCTL_SFTDISCON;
2659 writel(dctl, hsotg->regs + DCTL);
2660 }
2661
2662 if (hsotg->wq_otg) {
2663 if (!cancel_work_sync(&hsotg->wf_otg))
2664 flush_workqueue(hsotg->wq_otg);
2665 destroy_workqueue(hsotg->wq_otg);
2666 }
2667
2668 kfree(hsotg->core_params);
2669 hsotg->core_params = NULL;
2670 del_timer(&hsotg->wkp_timer);
2671 }
2672
2673 static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
2674 {
2675 /* Turn off all host-specific interrupts */
2676 dwc2_disable_host_interrupts(hsotg);
2677
2678 dwc2_hcd_free(hsotg);
2679 }
2680
2681 /*
2682 * Sets all parameters to the given value.
2683 *
2684 * Assumes that the dwc2_core_params struct contains only integers.
2685 */
2686 void dwc2_set_all_params(struct dwc2_core_params *params, int value)
2687 {
2688 int *p = (int *)params;
2689 size_t size = sizeof(*params) / sizeof(*p);
2690 int i;
2691
2692 for (i = 0; i < size; i++)
2693 p[i] = -1;
2694 }
2695 EXPORT_SYMBOL_GPL(dwc2_set_all_params);
2696
2697 /*
2698 * Initializes the HCD. This function allocates memory for and initializes the
2699 * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the
2700 * USB bus with the core and calls the hc_driver->start() function. It returns
2701 * a negative error on failure.
2702 */
2703 int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
2704 const struct dwc2_core_params *params)
2705 {
2706 struct usb_hcd *hcd;
2707 struct dwc2_host_chan *channel;
2708 u32 snpsid, gusbcfg, hcfg;
2709 int i, num_channels;
2710 int retval = -ENOMEM;
2711
2712 dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n");
2713
2714 /*
2715 * Attempt to ensure this device is really a DWC_otg Controller.
2716 * Read and verify the GSNPSID register contents. The value should be
2717 * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
2718 * as in "OTG version 2.xx" or "OTG version 3.xx".
2719 */
2720 snpsid = readl(hsotg->regs + GSNPSID);
2721 if ((snpsid & 0xfffff000) != 0x4f542000 &&
2722 (snpsid & 0xfffff000) != 0x4f543000) {
2723 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", snpsid);
2724 retval = -ENODEV;
2725 goto error1;
2726 }
2727
2728 /*
2729 * Store the contents of the hardware configuration registers here for
2730 * easy access later
2731 */
2732 hsotg->hwcfg1 = readl(hsotg->regs + GHWCFG1);
2733 hsotg->hwcfg2 = readl(hsotg->regs + GHWCFG2);
2734 hsotg->hwcfg3 = readl(hsotg->regs + GHWCFG3);
2735 hsotg->hwcfg4 = readl(hsotg->regs + GHWCFG4);
2736
2737 dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hsotg->hwcfg1);
2738 dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hsotg->hwcfg2);
2739 dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hsotg->hwcfg3);
2740 dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hsotg->hwcfg4);
2741
2742 /* Force host mode to get HPTXFSIZ exact power on value */
2743 gusbcfg = readl(hsotg->regs + GUSBCFG);
2744 gusbcfg |= GUSBCFG_FORCEHOSTMODE;
2745 writel(gusbcfg, hsotg->regs + GUSBCFG);
2746 usleep_range(100000, 150000);
2747
2748 hsotg->hptxfsiz = readl(hsotg->regs + HPTXFSIZ);
2749 dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hsotg->hptxfsiz);
2750 gusbcfg = readl(hsotg->regs + GUSBCFG);
2751 gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
2752 writel(gusbcfg, hsotg->regs + GUSBCFG);
2753 usleep_range(100000, 150000);
2754
2755 hcfg = readl(hsotg->regs + HCFG);
2756 dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg);
2757 dev_dbg(hsotg->dev, "op_mode=%0x\n",
2758 hsotg->hwcfg2 >> GHWCFG2_OP_MODE_SHIFT &
2759 GHWCFG2_OP_MODE_MASK >> GHWCFG2_OP_MODE_SHIFT);
2760 dev_dbg(hsotg->dev, "arch=%0x\n",
2761 hsotg->hwcfg2 >> GHWCFG2_ARCHITECTURE_SHIFT &
2762 GHWCFG2_ARCHITECTURE_MASK >> GHWCFG2_ARCHITECTURE_SHIFT);
2763 dev_dbg(hsotg->dev, "num_dev_ep=%d\n",
2764 hsotg->hwcfg2 >> GHWCFG2_NUM_DEV_EP_SHIFT &
2765 GHWCFG2_NUM_DEV_EP_MASK >> GHWCFG2_NUM_DEV_EP_SHIFT);
2766 dev_dbg(hsotg->dev, "max_host_chan=%d\n",
2767 hsotg->hwcfg2 >> GHWCFG2_NUM_HOST_CHAN_SHIFT &
2768 GHWCFG2_NUM_HOST_CHAN_MASK >> GHWCFG2_NUM_HOST_CHAN_SHIFT);
2769 dev_dbg(hsotg->dev, "nonperio_tx_q_depth=0x%0x\n",
2770 hsotg->hwcfg2 >> GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT &
2771 GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK >>
2772 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT);
2773 dev_dbg(hsotg->dev, "host_perio_tx_q_depth=0x%0x\n",
2774 hsotg->hwcfg2 >> GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT &
2775 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK >>
2776 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT);
2777 dev_dbg(hsotg->dev, "dev_token_q_depth=0x%0x\n",
2778 hsotg->hwcfg2 >> GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT &
2779 GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK >>
2780 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT);
2781
2782 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
2783 hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) *
2784 FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
2785 if (!hsotg->frame_num_array)
2786 goto error1;
2787 hsotg->last_frame_num_array = kzalloc(
2788 sizeof(*hsotg->last_frame_num_array) *
2789 FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
2790 if (!hsotg->last_frame_num_array)
2791 goto error1;
2792 hsotg->last_frame_num = HFNUM_MAX_FRNUM;
2793 #endif
2794
2795 hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL);
2796 if (!hsotg->core_params)
2797 goto error1;
2798
2799 dwc2_set_all_params(hsotg->core_params, -1);
2800
2801 /* Validate parameter values */
2802 dwc2_set_parameters(hsotg, params);
2803
2804 /* Set device flags indicating whether the HCD supports DMA */
2805 if (hsotg->core_params->dma_enable > 0) {
2806 if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
2807 dev_warn(hsotg->dev, "can't set DMA mask\n");
2808 if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(31)) < 0)
2809 dev_warn(hsotg->dev,
2810 "can't enable workaround for >2GB RAM\n");
2811 } else {
2812 dma_set_mask(hsotg->dev, 0);
2813 dma_set_coherent_mask(hsotg->dev, 0);
2814 }
2815
2816 hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev));
2817 if (!hcd)
2818 goto error1;
2819
2820 hcd->has_tt = 1;
2821
2822 spin_lock_init(&hsotg->lock);
2823 ((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg;
2824 hsotg->priv = hcd;
2825
2826 /*
2827 * Disable the global interrupt until all the interrupt handlers are
2828 * installed
2829 */
2830 dwc2_disable_global_interrupts(hsotg);
2831
2832 /* Initialize the DWC_otg core, and select the Phy type */
2833 retval = dwc2_core_init(hsotg, true, irq);
2834 if (retval)
2835 goto error2;
2836
2837 /* Create new workqueue and init work */
2838 retval = -ENOMEM;
2839 hsotg->wq_otg = create_singlethread_workqueue("dwc2");
2840 if (!hsotg->wq_otg) {
2841 dev_err(hsotg->dev, "Failed to create workqueue\n");
2842 goto error2;
2843 }
2844 INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change);
2845
2846 hsotg->snpsid = readl(hsotg->regs + GSNPSID);
2847 dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x\n",
2848 hsotg->snpsid >> 12 & 0xf, hsotg->snpsid >> 8 & 0xf,
2849 hsotg->snpsid >> 4 & 0xf, hsotg->snpsid & 0xf);
2850
2851 setup_timer(&hsotg->wkp_timer, dwc2_wakeup_detected,
2852 (unsigned long)hsotg);
2853
2854 /* Initialize the non-periodic schedule */
2855 INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive);
2856 INIT_LIST_HEAD(&hsotg->non_periodic_sched_active);
2857
2858 /* Initialize the periodic schedule */
2859 INIT_LIST_HEAD(&hsotg->periodic_sched_inactive);
2860 INIT_LIST_HEAD(&hsotg->periodic_sched_ready);
2861 INIT_LIST_HEAD(&hsotg->periodic_sched_assigned);
2862 INIT_LIST_HEAD(&hsotg->periodic_sched_queued);
2863
2864 /*
2865 * Create a host channel descriptor for each host channel implemented
2866 * in the controller. Initialize the channel descriptor array.
2867 */
2868 INIT_LIST_HEAD(&hsotg->free_hc_list);
2869 num_channels = hsotg->core_params->host_channels;
2870 memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array));
2871
2872 for (i = 0; i < num_channels; i++) {
2873 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
2874 if (channel == NULL)
2875 goto error3;
2876 channel->hc_num = i;
2877 hsotg->hc_ptr_array[i] = channel;
2878 }
2879
2880 /* Initialize hsotg start work */
2881 INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func);
2882
2883 /* Initialize port reset work */
2884 INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func);
2885
2886 /*
2887 * Allocate space for storing data on status transactions. Normally no
2888 * data is sent, but this space acts as a bit bucket. This must be
2889 * done after usb_add_hcd since that function allocates the DMA buffer
2890 * pool.
2891 */
2892 if (hsotg->core_params->dma_enable > 0)
2893 hsotg->status_buf = dma_alloc_coherent(hsotg->dev,
2894 DWC2_HCD_STATUS_BUF_SIZE,
2895 &hsotg->status_buf_dma, GFP_KERNEL);
2896 else
2897 hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE,
2898 GFP_KERNEL);
2899
2900 if (!hsotg->status_buf)
2901 goto error3;
2902
2903 hsotg->otg_port = 1;
2904 hsotg->frame_list = NULL;
2905 hsotg->frame_list_dma = 0;
2906 hsotg->periodic_qh_count = 0;
2907
2908 /* Initiate lx_state to L3 disconnected state */
2909 hsotg->lx_state = DWC2_L3;
2910
2911 hcd->self.otg_port = hsotg->otg_port;
2912
2913 /* Don't support SG list at this point */
2914 hcd->self.sg_tablesize = 0;
2915
2916 /*
2917 * Finish generic HCD initialization and start the HCD. This function
2918 * allocates the DMA buffer pool, registers the USB bus, requests the
2919 * IRQ line, and calls hcd_start method.
2920 */
2921 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
2922 if (retval < 0)
2923 goto error3;
2924
2925 dwc2_dump_global_registers(hsotg);
2926 dwc2_dump_host_registers(hsotg);
2927 dwc2_hcd_dump_state(hsotg);
2928
2929 dwc2_enable_global_interrupts(hsotg);
2930
2931 return 0;
2932
2933 error3:
2934 dwc2_hcd_release(hsotg);
2935 error2:
2936 usb_put_hcd(hcd);
2937 error1:
2938 kfree(hsotg->core_params);
2939
2940 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
2941 kfree(hsotg->last_frame_num_array);
2942 kfree(hsotg->frame_num_array);
2943 #endif
2944
2945 dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval);
2946 return retval;
2947 }
2948 EXPORT_SYMBOL_GPL(dwc2_hcd_init);
2949
2950 /*
2951 * Removes the HCD.
2952 * Frees memory and resources associated with the HCD and deregisters the bus.
2953 */
2954 void dwc2_hcd_remove(struct dwc2_hsotg *hsotg)
2955 {
2956 struct usb_hcd *hcd;
2957
2958 dev_dbg(hsotg->dev, "DWC OTG HCD REMOVE\n");
2959
2960 hcd = dwc2_hsotg_to_hcd(hsotg);
2961 dev_dbg(hsotg->dev, "hsotg->hcd = %p\n", hcd);
2962
2963 if (!hcd) {
2964 dev_dbg(hsotg->dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n",
2965 __func__);
2966 return;
2967 }
2968
2969 usb_remove_hcd(hcd);
2970 hsotg->priv = NULL;
2971 dwc2_hcd_release(hsotg);
2972 usb_put_hcd(hcd);
2973
2974 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
2975 kfree(hsotg->last_frame_num_array);
2976 kfree(hsotg->frame_num_array);
2977 #endif
2978 }
2979 EXPORT_SYMBOL_GPL(dwc2_hcd_remove);
Linus' kernel tree