2 * hcd.c - DesignWare HS OTG Controller host-mode routines
4 * Copyright (C) 2004-2013 Synopsys, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
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.
38 * This file contains the core HCD code, and implements the Linux hc_driver
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>
48 #include <linux/slab.h>
49 #include <linux/usb.h>
51 #include <linux/usb/hcd.h>
52 #include <linux/usb/ch11.h>
58 * dwc2_dump_channel_info() - Prints the state of a host channel
60 * @hsotg: Programming view of DWC_otg controller
61 * @chan: Pointer to the channel to dump
63 * Must be called with interrupt disabled and spinlock held
65 * NOTE: This function will be removed once the peripheral controller code
66 * is integrated and the driver is stable
68 static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg,
69 struct dwc2_host_chan *chan)
72 int num_channels = hsotg->core_params->host_channels;
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));
88 dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan);
89 dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n",
91 dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n",
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,
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,
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];
117 dev_dbg(hsotg->dev, " %2d: %p\n", i, chan);
119 #endif /* VERBOSE_DEBUG */
123 * Processes all the URBs in a single list of QHs. Completes them with
124 * -ETIMEDOUT and frees the QTD.
126 * Must be called with interrupt disabled and spinlock held
128 static void dwc2_kill_urbs_in_qh_list(struct dwc2_hsotg *hsotg,
129 struct list_head *qh_list)
131 struct dwc2_qh *qh, *qh_tmp;
132 struct dwc2_qtd *qtd, *qtd_tmp;
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,
137 dwc2_host_complete(hsotg, qtd, -ETIMEDOUT);
138 dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
143 static void dwc2_qh_list_free(struct dwc2_hsotg *hsotg,
144 struct list_head *qh_list)
146 struct dwc2_qtd *qtd, *qtd_tmp;
147 struct dwc2_qh *qh, *qh_tmp;
151 /* The list hasn't been initialized yet */
154 spin_lock_irqsave(&hsotg->lock, flags);
156 /* Ensure there are no QTDs or URBs left */
157 dwc2_kill_urbs_in_qh_list(hsotg, qh_list);
159 list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) {
160 dwc2_hcd_qh_unlink(hsotg, qh);
162 /* Free each QTD in the QH's QTD list */
163 list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
165 dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
167 spin_unlock_irqrestore(&hsotg->lock, flags);
168 dwc2_hcd_qh_free(hsotg, qh);
169 spin_lock_irqsave(&hsotg->lock, flags);
172 spin_unlock_irqrestore(&hsotg->lock, flags);
176 * Responds with an error status of -ETIMEDOUT to all URBs in the non-periodic
177 * and periodic schedules. The QTD associated with each URB is removed from
178 * the schedule and freed. This function may be called when a disconnect is
179 * detected or when the HCD is being stopped.
181 * Must be called with interrupt disabled and spinlock held
183 static void dwc2_kill_all_urbs(struct dwc2_hsotg *hsotg)
185 dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_inactive);
186 dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_active);
187 dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_inactive);
188 dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_ready);
189 dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_assigned);
190 dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_queued);
194 * dwc2_hcd_start() - Starts the HCD when switching to Host mode
196 * @hsotg: Pointer to struct dwc2_hsotg
198 void dwc2_hcd_start(struct dwc2_hsotg *hsotg)
202 if (hsotg->op_state == OTG_STATE_B_HOST) {
204 * Reset the port. During a HNP mode switch the reset
205 * needs to occur within 1ms and have a duration of at
208 hprt0 = dwc2_read_hprt0(hsotg);
210 writel(hprt0, hsotg->regs + HPRT0);
213 queue_delayed_work(hsotg->wq_otg, &hsotg->start_work,
214 msecs_to_jiffies(50));
217 /* Must be called with interrupt disabled and spinlock held */
218 static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg)
220 int num_channels = hsotg->core_params->host_channels;
221 struct dwc2_host_chan *channel;
225 if (hsotg->core_params->dma_enable <= 0) {
226 /* Flush out any channel requests in slave mode */
227 for (i = 0; i < num_channels; i++) {
228 channel = hsotg->hc_ptr_array[i];
229 if (!list_empty(&channel->hc_list_entry))
231 hcchar = readl(hsotg->regs + HCCHAR(i));
232 if (hcchar & HCCHAR_CHENA) {
233 hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR);
234 hcchar |= HCCHAR_CHDIS;
235 writel(hcchar, hsotg->regs + HCCHAR(i));
240 for (i = 0; i < num_channels; i++) {
241 channel = hsotg->hc_ptr_array[i];
242 if (!list_empty(&channel->hc_list_entry))
244 hcchar = readl(hsotg->regs + HCCHAR(i));
245 if (hcchar & HCCHAR_CHENA) {
246 /* Halt the channel */
247 hcchar |= HCCHAR_CHDIS;
248 writel(hcchar, hsotg->regs + HCCHAR(i));
251 dwc2_hc_cleanup(hsotg, channel);
252 list_add_tail(&channel->hc_list_entry, &hsotg->free_hc_list);
254 * Added for Descriptor DMA to prevent channel double cleanup in
255 * release_channel_ddma(), which is called from ep_disable when
263 * dwc2_hcd_disconnect() - Handles disconnect of the HCD
265 * @hsotg: Pointer to struct dwc2_hsotg
267 * Must be called with interrupt disabled and spinlock held
269 void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg)
273 /* Set status flags for the hub driver */
274 hsotg->flags.b.port_connect_status_change = 1;
275 hsotg->flags.b.port_connect_status = 0;
278 * Shutdown any transfers in process by clearing the Tx FIFO Empty
279 * interrupt mask and status bits and disabling subsequent host
280 * channel interrupts.
282 intr = readl(hsotg->regs + GINTMSK);
283 intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT);
284 writel(intr, hsotg->regs + GINTMSK);
285 intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT;
286 writel(intr, hsotg->regs + GINTSTS);
289 * Turn off the vbus power only if the core has transitioned to device
290 * mode. If still in host mode, need to keep power on to detect a
293 if (dwc2_is_device_mode(hsotg)) {
294 if (hsotg->op_state != OTG_STATE_A_SUSPEND) {
295 dev_dbg(hsotg->dev, "Disconnect: PortPower off\n");
296 writel(0, hsotg->regs + HPRT0);
299 dwc2_disable_host_interrupts(hsotg);
302 /* Respond with an error status to all URBs in the schedule */
303 dwc2_kill_all_urbs(hsotg);
305 if (dwc2_is_host_mode(hsotg))
306 /* Clean up any host channels that were in use */
307 dwc2_hcd_cleanup_channels(hsotg);
309 dwc2_host_disconnect(hsotg);
313 * dwc2_hcd_rem_wakeup() - Handles Remote Wakeup
315 * @hsotg: Pointer to struct dwc2_hsotg
317 static void dwc2_hcd_rem_wakeup(struct dwc2_hsotg *hsotg)
319 if (hsotg->lx_state == DWC2_L2)
320 hsotg->flags.b.port_suspend_change = 1;
322 hsotg->flags.b.port_l1_change = 1;
326 * dwc2_hcd_stop() - Halts the DWC_otg host mode operations in a clean manner
328 * @hsotg: Pointer to struct dwc2_hsotg
330 * Must be called with interrupt disabled and spinlock held
332 void dwc2_hcd_stop(struct dwc2_hsotg *hsotg)
334 dev_dbg(hsotg->dev, "DWC OTG HCD STOP\n");
337 * The root hub should be disconnected before this function is called.
338 * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue)
339 * and the QH lists (via ..._hcd_endpoint_disable).
342 /* Turn off all host-specific interrupts */
343 dwc2_disable_host_interrupts(hsotg);
345 /* Turn off the vbus power */
346 dev_dbg(hsotg->dev, "PortPower off\n");
347 writel(0, hsotg->regs + HPRT0);
350 static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
351 struct dwc2_hcd_urb *urb, void **ep_handle,
354 struct dwc2_qtd *qtd;
359 if (!hsotg->flags.b.port_connect_status) {
360 /* No longer connected */
361 dev_err(hsotg->dev, "Not connected\n");
365 qtd = kzalloc(sizeof(*qtd), mem_flags);
369 dwc2_hcd_qtd_init(qtd, urb);
370 retval = dwc2_hcd_qtd_add(hsotg, qtd, (struct dwc2_qh **)ep_handle,
374 "DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n",
380 intr_mask = readl(hsotg->regs + GINTMSK);
381 if (!(intr_mask & GINTSTS_SOF) && retval == 0) {
382 enum dwc2_transaction_type tr_type;
384 if (qtd->qh->ep_type == USB_ENDPOINT_XFER_BULK &&
385 !(qtd->urb->flags & URB_GIVEBACK_ASAP))
387 * Do not schedule SG transactions until qtd has
388 * URB_GIVEBACK_ASAP set
392 spin_lock_irqsave(&hsotg->lock, flags);
393 tr_type = dwc2_hcd_select_transactions(hsotg);
394 if (tr_type != DWC2_TRANSACTION_NONE)
395 dwc2_hcd_queue_transactions(hsotg, tr_type);
396 spin_unlock_irqrestore(&hsotg->lock, flags);
402 /* Must be called with interrupt disabled and spinlock held */
403 static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg,
404 struct dwc2_hcd_urb *urb)
407 struct dwc2_qtd *urb_qtd;
411 dev_dbg(hsotg->dev, "## Urb QTD is NULL ##\n");
417 dev_dbg(hsotg->dev, "## Urb QTD QH is NULL ##\n");
423 if (urb_qtd->in_process && qh->channel) {
424 dwc2_dump_channel_info(hsotg, qh->channel);
426 /* The QTD is in process (it has been assigned to a channel) */
427 if (hsotg->flags.b.port_connect_status)
429 * If still connected (i.e. in host mode), halt the
430 * channel so it can be used for other transfers. If
431 * no longer connected, the host registers can't be
432 * written to halt the channel since the core is in
435 dwc2_hc_halt(hsotg, qh->channel,
436 DWC2_HC_XFER_URB_DEQUEUE);
440 * Free the QTD and clean up the associated QH. Leave the QH in the
441 * schedule if it has any remaining QTDs.
443 if (hsotg->core_params->dma_desc_enable <= 0) {
444 u8 in_process = urb_qtd->in_process;
446 dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
448 dwc2_hcd_qh_deactivate(hsotg, qh, 0);
450 } else if (list_empty(&qh->qtd_list)) {
451 dwc2_hcd_qh_unlink(hsotg, qh);
454 dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
460 /* Must NOT be called with interrupt disabled or spinlock held */
461 static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg,
462 struct usb_host_endpoint *ep, int retry)
464 struct dwc2_qtd *qtd, *qtd_tmp;
469 spin_lock_irqsave(&hsotg->lock, flags);
477 while (!list_empty(&qh->qtd_list) && retry--) {
480 "## timeout in dwc2_hcd_endpoint_disable() ##\n");
485 spin_unlock_irqrestore(&hsotg->lock, flags);
486 usleep_range(20000, 40000);
487 spin_lock_irqsave(&hsotg->lock, flags);
495 dwc2_hcd_qh_unlink(hsotg, qh);
497 /* Free each QTD in the QH's QTD list */
498 list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry)
499 dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
502 spin_unlock_irqrestore(&hsotg->lock, flags);
503 dwc2_hcd_qh_free(hsotg, qh);
509 spin_unlock_irqrestore(&hsotg->lock, flags);
514 /* Must be called with interrupt disabled and spinlock held */
515 static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg,
516 struct usb_host_endpoint *ep)
518 struct dwc2_qh *qh = ep->hcpriv;
523 qh->data_toggle = DWC2_HC_PID_DATA0;
529 * Initializes dynamic portions of the DWC_otg HCD state
531 * Must be called with interrupt disabled and spinlock held
533 static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg)
535 struct dwc2_host_chan *chan, *chan_tmp;
539 hsotg->flags.d32 = 0;
541 hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active;
542 hsotg->non_periodic_channels = 0;
543 hsotg->periodic_channels = 0;
546 * Put all channels in the free channel list and clean up channel
549 list_for_each_entry_safe(chan, chan_tmp, &hsotg->free_hc_list,
551 list_del_init(&chan->hc_list_entry);
553 num_channels = hsotg->core_params->host_channels;
554 for (i = 0; i < num_channels; i++) {
555 chan = hsotg->hc_ptr_array[i];
556 list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
557 dwc2_hc_cleanup(hsotg, chan);
560 /* Initialize the DWC core for host mode operation */
561 dwc2_core_host_init(hsotg);
564 static void dwc2_hc_init_split(struct dwc2_hsotg *hsotg,
565 struct dwc2_host_chan *chan,
566 struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb)
568 int hub_addr, hub_port;
571 chan->xact_pos = qtd->isoc_split_pos;
572 chan->complete_split = qtd->complete_split;
573 dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port);
574 chan->hub_addr = (u8)hub_addr;
575 chan->hub_port = (u8)hub_port;
578 static void *dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
579 struct dwc2_host_chan *chan,
580 struct dwc2_qtd *qtd, void *bufptr)
582 struct dwc2_hcd_urb *urb = qtd->urb;
583 struct dwc2_hcd_iso_packet_desc *frame_desc;
585 switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) {
586 case USB_ENDPOINT_XFER_CONTROL:
587 chan->ep_type = USB_ENDPOINT_XFER_CONTROL;
589 switch (qtd->control_phase) {
590 case DWC2_CONTROL_SETUP:
591 dev_vdbg(hsotg->dev, " Control setup transaction\n");
594 chan->data_pid_start = DWC2_HC_PID_SETUP;
595 if (hsotg->core_params->dma_enable > 0)
596 chan->xfer_dma = urb->setup_dma;
598 chan->xfer_buf = urb->setup_packet;
603 case DWC2_CONTROL_DATA:
604 dev_vdbg(hsotg->dev, " Control data transaction\n");
605 chan->data_pid_start = qtd->data_toggle;
608 case DWC2_CONTROL_STATUS:
610 * Direction is opposite of data direction or IN if no
613 dev_vdbg(hsotg->dev, " Control status transaction\n");
614 if (urb->length == 0)
618 dwc2_hcd_is_pipe_out(&urb->pipe_info);
621 chan->data_pid_start = DWC2_HC_PID_DATA1;
623 if (hsotg->core_params->dma_enable > 0)
624 chan->xfer_dma = hsotg->status_buf_dma;
626 chan->xfer_buf = hsotg->status_buf;
632 case USB_ENDPOINT_XFER_BULK:
633 chan->ep_type = USB_ENDPOINT_XFER_BULK;
636 case USB_ENDPOINT_XFER_INT:
637 chan->ep_type = USB_ENDPOINT_XFER_INT;
640 case USB_ENDPOINT_XFER_ISOC:
641 chan->ep_type = USB_ENDPOINT_XFER_ISOC;
642 if (hsotg->core_params->dma_desc_enable > 0)
645 frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
646 frame_desc->status = 0;
648 if (hsotg->core_params->dma_enable > 0) {
649 chan->xfer_dma = urb->dma;
650 chan->xfer_dma += frame_desc->offset +
651 qtd->isoc_split_offset;
653 chan->xfer_buf = urb->buf;
654 chan->xfer_buf += frame_desc->offset +
655 qtd->isoc_split_offset;
658 chan->xfer_len = frame_desc->length - qtd->isoc_split_offset;
660 /* For non-dword aligned buffers */
661 if (hsotg->core_params->dma_enable > 0 &&
662 (chan->xfer_dma & 0x3))
663 bufptr = (u8 *)urb->buf + frame_desc->offset +
664 qtd->isoc_split_offset;
668 if (chan->xact_pos == DWC2_HCSPLT_XACTPOS_ALL) {
669 if (chan->xfer_len <= 188)
670 chan->xact_pos = DWC2_HCSPLT_XACTPOS_ALL;
672 chan->xact_pos = DWC2_HCSPLT_XACTPOS_BEGIN;
680 static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
681 struct dwc2_host_chan *chan, void *bufptr)
685 if (chan->ep_type != USB_ENDPOINT_XFER_ISOC)
686 buf_size = hsotg->core_params->max_transfer_size;
690 if (!qh->dw_align_buf) {
691 qh->dw_align_buf = dma_alloc_coherent(hsotg->dev, buf_size,
692 &qh->dw_align_buf_dma,
694 if (!qh->dw_align_buf)
698 if (!chan->ep_is_in && chan->xfer_len) {
699 dma_sync_single_for_cpu(hsotg->dev, chan->xfer_dma, buf_size,
701 memcpy(qh->dw_align_buf, bufptr, chan->xfer_len);
702 dma_sync_single_for_device(hsotg->dev, chan->xfer_dma, buf_size,
706 chan->align_buf = qh->dw_align_buf_dma;
711 * dwc2_assign_and_init_hc() - Assigns transactions from a QTD to a free host
712 * channel and initializes the host channel to perform the transactions. The
713 * host channel is removed from the free list.
715 * @hsotg: The HCD state structure
716 * @qh: Transactions from the first QTD for this QH are selected and assigned
717 * to a free host channel
719 static void dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg,
722 struct dwc2_host_chan *chan;
723 struct dwc2_hcd_urb *urb;
724 struct dwc2_qtd *qtd;
728 dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh);
730 if (list_empty(&qh->qtd_list)) {
731 dev_dbg(hsotg->dev, "No QTDs in QH list\n");
735 if (list_empty(&hsotg->free_hc_list)) {
736 dev_dbg(hsotg->dev, "No free channel to assign\n");
740 chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan,
743 /* Remove the host channel from the free list */
744 list_del_init(&chan->hc_list_entry);
746 qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry);
752 * Use usb_pipedevice to determine device address. This address is
753 * 0 before the SET_ADDRESS command and the correct address afterward.
755 chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info);
756 chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info);
757 chan->speed = qh->dev_speed;
758 chan->max_packet = dwc2_max_packet(qh->maxp);
760 chan->xfer_started = 0;
761 chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS;
762 chan->error_state = (qtd->error_count > 0);
763 chan->halt_on_queue = 0;
764 chan->halt_pending = 0;
768 * The following values may be modified in the transfer type section
769 * below. The xfer_len value may be reduced when the transfer is
770 * started to accommodate the max widths of the XferSize and PktCnt
771 * fields in the HCTSIZn register.
774 chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0);
778 chan->do_ping = qh->ping_state;
780 chan->data_pid_start = qh->data_toggle;
781 chan->multi_count = 1;
783 if (hsotg->core_params->dma_enable > 0) {
784 chan->xfer_dma = urb->dma + urb->actual_length;
786 /* For non-dword aligned case */
787 if (hsotg->core_params->dma_desc_enable <= 0 &&
788 (chan->xfer_dma & 0x3))
789 bufptr = (u8 *)urb->buf + urb->actual_length;
791 chan->xfer_buf = (u8 *)urb->buf + urb->actual_length;
794 chan->xfer_len = urb->length - urb->actual_length;
795 chan->xfer_count = 0;
797 /* Set the split attributes if required */
799 dwc2_hc_init_split(hsotg, chan, qtd, urb);
803 /* Set the transfer attributes */
804 bufptr = dwc2_hc_init_xfer(hsotg, chan, qtd, bufptr);
806 /* Non DWORD-aligned buffer case */
808 dev_vdbg(hsotg->dev, "Non-aligned buffer\n");
809 if (dwc2_hc_setup_align_buf(hsotg, qh, chan, bufptr)) {
811 "%s: Failed to allocate memory to handle non-dword aligned buffer\n",
813 /* Add channel back to free list */
815 chan->multi_count = 0;
816 list_add_tail(&chan->hc_list_entry,
817 &hsotg->free_hc_list);
826 if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
827 chan->ep_type == USB_ENDPOINT_XFER_ISOC)
829 * This value may be modified when the transfer is started
830 * to reflect the actual transfer length
832 chan->multi_count = dwc2_hb_mult(qh->maxp);
834 if (hsotg->core_params->dma_desc_enable > 0)
835 chan->desc_list_addr = qh->desc_list_dma;
837 dwc2_hc_init(hsotg, chan);
842 * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer
843 * schedule and assigns them to available host channels. Called from the HCD
844 * interrupt handler functions.
846 * @hsotg: The HCD state structure
848 * Return: The types of new transactions that were assigned to host channels
850 enum dwc2_transaction_type dwc2_hcd_select_transactions(
851 struct dwc2_hsotg *hsotg)
853 enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE;
854 struct list_head *qh_ptr;
858 #ifdef DWC2_DEBUG_SOF
859 dev_vdbg(hsotg->dev, " Select Transactions\n");
862 /* Process entries in the periodic ready list */
863 qh_ptr = hsotg->periodic_sched_ready.next;
864 while (qh_ptr != &hsotg->periodic_sched_ready) {
865 if (list_empty(&hsotg->free_hc_list))
867 qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
868 dwc2_assign_and_init_hc(hsotg, qh);
871 * Move the QH from the periodic ready schedule to the
872 * periodic assigned schedule
874 qh_ptr = qh_ptr->next;
875 list_move(&qh->qh_list_entry, &hsotg->periodic_sched_assigned);
876 ret_val = DWC2_TRANSACTION_PERIODIC;
880 * Process entries in the inactive portion of the non-periodic
881 * schedule. Some free host channels may not be used if they are
882 * reserved for periodic transfers.
884 num_channels = hsotg->core_params->host_channels;
885 qh_ptr = hsotg->non_periodic_sched_inactive.next;
886 while (qh_ptr != &hsotg->non_periodic_sched_inactive) {
887 if (hsotg->non_periodic_channels >= num_channels -
888 hsotg->periodic_channels)
890 if (list_empty(&hsotg->free_hc_list))
892 qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
893 dwc2_assign_and_init_hc(hsotg, qh);
896 * Move the QH from the non-periodic inactive schedule to the
897 * non-periodic active schedule
899 qh_ptr = qh_ptr->next;
900 list_move(&qh->qh_list_entry,
901 &hsotg->non_periodic_sched_active);
903 if (ret_val == DWC2_TRANSACTION_NONE)
904 ret_val = DWC2_TRANSACTION_NON_PERIODIC;
906 ret_val = DWC2_TRANSACTION_ALL;
908 hsotg->non_periodic_channels++;
915 * dwc2_queue_transaction() - Attempts to queue a single transaction request for
916 * a host channel associated with either a periodic or non-periodic transfer
918 * @hsotg: The HCD state structure
919 * @chan: Host channel descriptor associated with either a periodic or
920 * non-periodic transfer
921 * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO
922 * for periodic transfers or the non-periodic Tx FIFO
923 * for non-periodic transfers
925 * Return: 1 if a request is queued and more requests may be needed to
926 * complete the transfer, 0 if no more requests are required for this
927 * transfer, -1 if there is insufficient space in the Tx FIFO
929 * This function assumes that there is space available in the appropriate
930 * request queue. For an OUT transfer or SETUP transaction in Slave mode,
931 * it checks whether space is available in the appropriate Tx FIFO.
933 * Must be called with interrupt disabled and spinlock held
935 static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg,
936 struct dwc2_host_chan *chan,
937 u16 fifo_dwords_avail)
941 if (hsotg->core_params->dma_enable > 0) {
942 if (hsotg->core_params->dma_desc_enable > 0) {
943 if (!chan->xfer_started ||
944 chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
945 dwc2_hcd_start_xfer_ddma(hsotg, chan->qh);
946 chan->qh->ping_state = 0;
948 } else if (!chan->xfer_started) {
949 dwc2_hc_start_transfer(hsotg, chan);
950 chan->qh->ping_state = 0;
952 } else if (chan->halt_pending) {
953 /* Don't queue a request if the channel has been halted */
954 } else if (chan->halt_on_queue) {
955 dwc2_hc_halt(hsotg, chan, chan->halt_status);
956 } else if (chan->do_ping) {
957 if (!chan->xfer_started)
958 dwc2_hc_start_transfer(hsotg, chan);
959 } else if (!chan->ep_is_in ||
960 chan->data_pid_start == DWC2_HC_PID_SETUP) {
961 if ((fifo_dwords_avail * 4) >= chan->max_packet) {
962 if (!chan->xfer_started) {
963 dwc2_hc_start_transfer(hsotg, chan);
966 retval = dwc2_hc_continue_transfer(hsotg, chan);
972 if (!chan->xfer_started) {
973 dwc2_hc_start_transfer(hsotg, chan);
976 retval = dwc2_hc_continue_transfer(hsotg, chan);
984 * Processes periodic channels for the next frame and queues transactions for
985 * these channels to the DWC_otg controller. After queueing transactions, the
986 * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions
987 * to queue as Periodic Tx FIFO or request queue space becomes available.
988 * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled.
990 * Must be called with interrupt disabled and spinlock held
992 static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
994 struct list_head *qh_ptr;
1000 int no_queue_space = 0;
1001 int no_fifo_space = 0;
1005 dev_vdbg(hsotg->dev, "Queue periodic transactions\n");
1007 tx_status = readl(hsotg->regs + HPTXSTS);
1008 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1009 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1010 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1011 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1014 dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n",
1016 dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n",
1020 qh_ptr = hsotg->periodic_sched_assigned.next;
1021 while (qh_ptr != &hsotg->periodic_sched_assigned) {
1022 tx_status = readl(hsotg->regs + HPTXSTS);
1023 if ((tx_status & TXSTS_QSPCAVAIL_MASK) == 0) {
1028 qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
1030 qh_ptr = qh_ptr->next;
1034 /* Make sure EP's TT buffer is clean before queueing qtds */
1035 if (qh->tt_buffer_dirty) {
1036 qh_ptr = qh_ptr->next;
1041 * Set a flag if we're queuing high-bandwidth in slave mode.
1042 * The flag prevents any halts to get into the request queue in
1043 * the middle of multiple high-bandwidth packets getting queued.
1045 if (hsotg->core_params->dma_enable <= 0 &&
1046 qh->channel->multi_count > 1)
1047 hsotg->queuing_high_bandwidth = 1;
1049 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1050 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1051 status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
1058 * In Slave mode, stay on the current transfer until there is
1059 * nothing more to do or the high-bandwidth request count is
1060 * reached. In DMA mode, only need to queue one request. The
1061 * controller automatically handles multiple packets for
1062 * high-bandwidth transfers.
1064 if (hsotg->core_params->dma_enable > 0 || status == 0 ||
1065 qh->channel->requests == qh->channel->multi_count) {
1066 qh_ptr = qh_ptr->next;
1068 * Move the QH from the periodic assigned schedule to
1069 * the periodic queued schedule
1071 list_move(&qh->qh_list_entry,
1072 &hsotg->periodic_sched_queued);
1074 /* done queuing high bandwidth */
1075 hsotg->queuing_high_bandwidth = 0;
1079 if (hsotg->core_params->dma_enable <= 0) {
1080 tx_status = readl(hsotg->regs + HPTXSTS);
1081 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1082 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1083 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1084 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1086 dev_vdbg(hsotg->dev,
1087 " P Tx Req Queue Space Avail (after queue): %d\n",
1089 dev_vdbg(hsotg->dev,
1090 " P Tx FIFO Space Avail (after queue): %d\n",
1094 if (!list_empty(&hsotg->periodic_sched_assigned) ||
1095 no_queue_space || no_fifo_space) {
1097 * May need to queue more transactions as the request
1098 * queue or Tx FIFO empties. Enable the periodic Tx
1099 * FIFO empty interrupt. (Always use the half-empty
1100 * level to ensure that new requests are loaded as
1101 * soon as possible.)
1103 gintmsk = readl(hsotg->regs + GINTMSK);
1104 gintmsk |= GINTSTS_PTXFEMP;
1105 writel(gintmsk, hsotg->regs + GINTMSK);
1108 * Disable the Tx FIFO empty interrupt since there are
1109 * no more transactions that need to be queued right
1110 * now. This function is called from interrupt
1111 * handlers to queue more transactions as transfer
1114 gintmsk = readl(hsotg->regs + GINTMSK);
1115 gintmsk &= ~GINTSTS_PTXFEMP;
1116 writel(gintmsk, hsotg->regs + GINTMSK);
1122 * Processes active non-periodic channels and queues transactions for these
1123 * channels to the DWC_otg controller. After queueing transactions, the NP Tx
1124 * FIFO Empty interrupt is enabled if there are more transactions to queue as
1125 * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx
1126 * FIFO Empty interrupt is disabled.
1128 * Must be called with interrupt disabled and spinlock held
1130 static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg)
1132 struct list_head *orig_qh_ptr;
1139 int no_queue_space = 0;
1140 int no_fifo_space = 0;
1143 dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n");
1145 tx_status = readl(hsotg->regs + GNPTXSTS);
1146 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1147 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1148 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1149 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1150 dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n",
1152 dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n",
1156 * Keep track of the starting point. Skip over the start-of-list
1159 if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active)
1160 hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
1161 orig_qh_ptr = hsotg->non_periodic_qh_ptr;
1164 * Process once through the active list or until no more space is
1165 * available in the request queue or the Tx FIFO
1168 tx_status = readl(hsotg->regs + GNPTXSTS);
1169 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1170 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1171 if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) {
1176 qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh,
1181 /* Make sure EP's TT buffer is clean before queueing qtds */
1182 if (qh->tt_buffer_dirty)
1185 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1186 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1187 status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
1191 } else if (status < 0) {
1196 /* Advance to next QH, skipping start-of-list entry */
1197 hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
1198 if (hsotg->non_periodic_qh_ptr ==
1199 &hsotg->non_periodic_sched_active)
1200 hsotg->non_periodic_qh_ptr =
1201 hsotg->non_periodic_qh_ptr->next;
1202 } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr);
1204 if (hsotg->core_params->dma_enable <= 0) {
1205 tx_status = readl(hsotg->regs + GNPTXSTS);
1206 qspcavail = tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1207 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT;
1208 fspcavail = tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1209 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT;
1210 dev_vdbg(hsotg->dev,
1211 " NP Tx Req Queue Space Avail (after queue): %d\n",
1213 dev_vdbg(hsotg->dev,
1214 " NP Tx FIFO Space Avail (after queue): %d\n",
1217 if (more_to_do || no_queue_space || no_fifo_space) {
1219 * May need to queue more transactions as the request
1220 * queue or Tx FIFO empties. Enable the non-periodic
1221 * Tx FIFO empty interrupt. (Always use the half-empty
1222 * level to ensure that new requests are loaded as
1223 * soon as possible.)
1225 gintmsk = readl(hsotg->regs + GINTMSK);
1226 gintmsk |= GINTSTS_NPTXFEMP;
1227 writel(gintmsk, hsotg->regs + GINTMSK);
1230 * Disable the Tx FIFO empty interrupt since there are
1231 * no more transactions that need to be queued right
1232 * now. This function is called from interrupt
1233 * handlers to queue more transactions as transfer
1236 gintmsk = readl(hsotg->regs + GINTMSK);
1237 gintmsk &= ~GINTSTS_NPTXFEMP;
1238 writel(gintmsk, hsotg->regs + GINTMSK);
1244 * dwc2_hcd_queue_transactions() - Processes the currently active host channels
1245 * and queues transactions for these channels to the DWC_otg controller. Called
1246 * from the HCD interrupt handler functions.
1248 * @hsotg: The HCD state structure
1249 * @tr_type: The type(s) of transactions to queue (non-periodic, periodic,
1252 * Must be called with interrupt disabled and spinlock held
1254 void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
1255 enum dwc2_transaction_type tr_type)
1257 #ifdef DWC2_DEBUG_SOF
1258 dev_vdbg(hsotg->dev, "Queue Transactions\n");
1260 /* Process host channels associated with periodic transfers */
1261 if ((tr_type == DWC2_TRANSACTION_PERIODIC ||
1262 tr_type == DWC2_TRANSACTION_ALL) &&
1263 !list_empty(&hsotg->periodic_sched_assigned))
1264 dwc2_process_periodic_channels(hsotg);
1266 /* Process host channels associated with non-periodic transfers */
1267 if (tr_type == DWC2_TRANSACTION_NON_PERIODIC ||
1268 tr_type == DWC2_TRANSACTION_ALL) {
1269 if (!list_empty(&hsotg->non_periodic_sched_active)) {
1270 dwc2_process_non_periodic_channels(hsotg);
1273 * Ensure NP Tx FIFO empty interrupt is disabled when
1274 * there are no non-periodic transfers to process
1276 u32 gintmsk = readl(hsotg->regs + GINTMSK);
1278 gintmsk &= ~GINTSTS_NPTXFEMP;
1279 writel(gintmsk, hsotg->regs + GINTMSK);
1284 static void dwc2_conn_id_status_change(struct work_struct *work)
1286 struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
1291 dev_dbg(hsotg->dev, "%s()\n", __func__);
1293 gotgctl = readl(hsotg->regs + GOTGCTL);
1294 dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl);
1295 dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n",
1296 !!(gotgctl & GOTGCTL_CONID_B));
1298 /* B-Device connector (Device Mode) */
1299 if (gotgctl & GOTGCTL_CONID_B) {
1300 /* Wait for switch to device mode */
1301 dev_dbg(hsotg->dev, "connId B\n");
1302 while (!dwc2_is_device_mode(hsotg)) {
1303 dev_info(hsotg->dev,
1304 "Waiting for Peripheral Mode, Mode=%s\n",
1305 dwc2_is_host_mode(hsotg) ? "Host" :
1307 usleep_range(20000, 40000);
1313 "Connection id status change timed out\n");
1314 hsotg->op_state = OTG_STATE_B_PERIPHERAL;
1315 dwc2_core_init(hsotg, false, -1);
1316 dwc2_enable_global_interrupts(hsotg);
1318 /* A-Device connector (Host Mode) */
1319 dev_dbg(hsotg->dev, "connId A\n");
1320 while (!dwc2_is_host_mode(hsotg)) {
1321 dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n",
1322 dwc2_is_host_mode(hsotg) ?
1323 "Host" : "Peripheral");
1324 usleep_range(20000, 40000);
1330 "Connection id status change timed out\n");
1331 hsotg->op_state = OTG_STATE_A_HOST;
1333 /* Initialize the Core for Host mode */
1334 dwc2_core_init(hsotg, false, -1);
1335 dwc2_enable_global_interrupts(hsotg);
1336 dwc2_hcd_start(hsotg);
1340 static void dwc2_wakeup_detected(unsigned long data)
1342 struct dwc2_hsotg *hsotg = (struct dwc2_hsotg *)data;
1345 dev_dbg(hsotg->dev, "%s()\n", __func__);
1348 * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms
1349 * so that OPT tests pass with all PHYs.)
1351 hprt0 = dwc2_read_hprt0(hsotg);
1352 dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0);
1353 hprt0 &= ~HPRT0_RES;
1354 writel(hprt0, hsotg->regs + HPRT0);
1355 dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n",
1356 readl(hsotg->regs + HPRT0));
1358 dwc2_hcd_rem_wakeup(hsotg);
1360 /* Change to L0 state */
1361 hsotg->lx_state = DWC2_L0;
1364 static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg)
1366 struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
1368 return hcd->self.b_hnp_enable;
1371 /* Must NOT be called with interrupt disabled or spinlock held */
1372 static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
1374 unsigned long flags;
1379 dev_dbg(hsotg->dev, "%s()\n", __func__);
1381 spin_lock_irqsave(&hsotg->lock, flags);
1383 if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) {
1384 gotgctl = readl(hsotg->regs + GOTGCTL);
1385 gotgctl |= GOTGCTL_HSTSETHNPEN;
1386 writel(gotgctl, hsotg->regs + GOTGCTL);
1387 hsotg->op_state = OTG_STATE_A_SUSPEND;
1390 hprt0 = dwc2_read_hprt0(hsotg);
1391 hprt0 |= HPRT0_SUSP;
1392 writel(hprt0, hsotg->regs + HPRT0);
1394 /* Update lx_state */
1395 hsotg->lx_state = DWC2_L2;
1397 /* Suspend the Phy Clock */
1398 pcgctl = readl(hsotg->regs + PCGCTL);
1399 pcgctl |= PCGCTL_STOPPCLK;
1400 writel(pcgctl, hsotg->regs + PCGCTL);
1403 /* For HNP the bus must be suspended for at least 200ms */
1404 if (dwc2_host_is_b_hnp_enabled(hsotg)) {
1405 pcgctl = readl(hsotg->regs + PCGCTL);
1406 pcgctl &= ~PCGCTL_STOPPCLK;
1407 writel(pcgctl, hsotg->regs + PCGCTL);
1409 spin_unlock_irqrestore(&hsotg->lock, flags);
1411 usleep_range(200000, 250000);
1413 spin_unlock_irqrestore(&hsotg->lock, flags);
1417 /* Handles hub class-specific requests */
1418 static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
1419 u16 wvalue, u16 windex, char *buf, u16 wlength)
1421 struct usb_hub_descriptor *hub_desc;
1429 case ClearHubFeature:
1430 dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue);
1433 case C_HUB_LOCAL_POWER:
1434 case C_HUB_OVER_CURRENT:
1435 /* Nothing required here */
1441 "ClearHubFeature request %1xh unknown\n",
1446 case ClearPortFeature:
1447 if (wvalue != USB_PORT_FEAT_L1)
1448 if (!windex || windex > 1)
1451 case USB_PORT_FEAT_ENABLE:
1453 "ClearPortFeature USB_PORT_FEAT_ENABLE\n");
1454 hprt0 = dwc2_read_hprt0(hsotg);
1456 writel(hprt0, hsotg->regs + HPRT0);
1459 case USB_PORT_FEAT_SUSPEND:
1461 "ClearPortFeature USB_PORT_FEAT_SUSPEND\n");
1462 writel(0, hsotg->regs + PCGCTL);
1463 usleep_range(20000, 40000);
1465 hprt0 = dwc2_read_hprt0(hsotg);
1467 writel(hprt0, hsotg->regs + HPRT0);
1468 hprt0 &= ~HPRT0_SUSP;
1469 usleep_range(100000, 150000);
1471 hprt0 &= ~HPRT0_RES;
1472 writel(hprt0, hsotg->regs + HPRT0);
1475 case USB_PORT_FEAT_POWER:
1477 "ClearPortFeature USB_PORT_FEAT_POWER\n");
1478 hprt0 = dwc2_read_hprt0(hsotg);
1479 hprt0 &= ~HPRT0_PWR;
1480 writel(hprt0, hsotg->regs + HPRT0);
1483 case USB_PORT_FEAT_INDICATOR:
1485 "ClearPortFeature USB_PORT_FEAT_INDICATOR\n");
1486 /* Port indicator not supported */
1489 case USB_PORT_FEAT_C_CONNECTION:
1491 * Clears driver's internal Connect Status Change flag
1494 "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n");
1495 hsotg->flags.b.port_connect_status_change = 0;
1498 case USB_PORT_FEAT_C_RESET:
1499 /* Clears driver's internal Port Reset Change flag */
1501 "ClearPortFeature USB_PORT_FEAT_C_RESET\n");
1502 hsotg->flags.b.port_reset_change = 0;
1505 case USB_PORT_FEAT_C_ENABLE:
1507 * Clears the driver's internal Port Enable/Disable
1511 "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n");
1512 hsotg->flags.b.port_enable_change = 0;
1515 case USB_PORT_FEAT_C_SUSPEND:
1517 * Clears the driver's internal Port Suspend Change
1518 * flag, which is set when resume signaling on the host
1522 "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n");
1523 hsotg->flags.b.port_suspend_change = 0;
1526 case USB_PORT_FEAT_C_PORT_L1:
1528 "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n");
1529 hsotg->flags.b.port_l1_change = 0;
1532 case USB_PORT_FEAT_C_OVER_CURRENT:
1534 "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n");
1535 hsotg->flags.b.port_over_current_change = 0;
1541 "ClearPortFeature request %1xh unknown or unsupported\n",
1546 case GetHubDescriptor:
1547 dev_dbg(hsotg->dev, "GetHubDescriptor\n");
1548 hub_desc = (struct usb_hub_descriptor *)buf;
1549 hub_desc->bDescLength = 9;
1550 hub_desc->bDescriptorType = 0x29;
1551 hub_desc->bNbrPorts = 1;
1552 hub_desc->wHubCharacteristics = cpu_to_le16(0x08);
1553 hub_desc->bPwrOn2PwrGood = 1;
1554 hub_desc->bHubContrCurrent = 0;
1555 hub_desc->u.hs.DeviceRemovable[0] = 0;
1556 hub_desc->u.hs.DeviceRemovable[1] = 0xff;
1560 dev_dbg(hsotg->dev, "GetHubStatus\n");
1565 dev_vdbg(hsotg->dev,
1566 "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex,
1568 if (!windex || windex > 1)
1572 if (hsotg->flags.b.port_connect_status_change)
1573 port_status |= USB_PORT_STAT_C_CONNECTION << 16;
1574 if (hsotg->flags.b.port_enable_change)
1575 port_status |= USB_PORT_STAT_C_ENABLE << 16;
1576 if (hsotg->flags.b.port_suspend_change)
1577 port_status |= USB_PORT_STAT_C_SUSPEND << 16;
1578 if (hsotg->flags.b.port_l1_change)
1579 port_status |= USB_PORT_STAT_C_L1 << 16;
1580 if (hsotg->flags.b.port_reset_change)
1581 port_status |= USB_PORT_STAT_C_RESET << 16;
1582 if (hsotg->flags.b.port_over_current_change) {
1583 dev_warn(hsotg->dev, "Overcurrent change detected\n");
1584 port_status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1587 if (!hsotg->flags.b.port_connect_status) {
1589 * The port is disconnected, which means the core is
1590 * either in device mode or it soon will be. Just
1591 * return 0's for the remainder of the port status
1592 * since the port register can't be read if the core
1593 * is in device mode.
1595 *(__le32 *)buf = cpu_to_le32(port_status);
1599 hprt0 = readl(hsotg->regs + HPRT0);
1600 dev_vdbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0);
1602 if (hprt0 & HPRT0_CONNSTS)
1603 port_status |= USB_PORT_STAT_CONNECTION;
1604 if (hprt0 & HPRT0_ENA)
1605 port_status |= USB_PORT_STAT_ENABLE;
1606 if (hprt0 & HPRT0_SUSP)
1607 port_status |= USB_PORT_STAT_SUSPEND;
1608 if (hprt0 & HPRT0_OVRCURRACT)
1609 port_status |= USB_PORT_STAT_OVERCURRENT;
1610 if (hprt0 & HPRT0_RST)
1611 port_status |= USB_PORT_STAT_RESET;
1612 if (hprt0 & HPRT0_PWR)
1613 port_status |= USB_PORT_STAT_POWER;
1615 speed = hprt0 & HPRT0_SPD_MASK;
1616 if (speed == HPRT0_SPD_HIGH_SPEED)
1617 port_status |= USB_PORT_STAT_HIGH_SPEED;
1618 else if (speed == HPRT0_SPD_LOW_SPEED)
1619 port_status |= USB_PORT_STAT_LOW_SPEED;
1621 if (hprt0 & HPRT0_TSTCTL_MASK)
1622 port_status |= USB_PORT_STAT_TEST;
1623 /* USB_PORT_FEAT_INDICATOR unsupported always 0 */
1625 dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status);
1626 *(__le32 *)buf = cpu_to_le32(port_status);
1630 dev_dbg(hsotg->dev, "SetHubFeature\n");
1631 /* No HUB features supported */
1634 case SetPortFeature:
1635 dev_dbg(hsotg->dev, "SetPortFeature\n");
1636 if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1))
1639 if (!hsotg->flags.b.port_connect_status) {
1641 * The port is disconnected, which means the core is
1642 * either in device mode or it soon will be. Just
1643 * return without doing anything since the port
1644 * register can't be written if the core is in device
1651 case USB_PORT_FEAT_SUSPEND:
1653 "SetPortFeature - USB_PORT_FEAT_SUSPEND\n");
1654 if (windex != hsotg->otg_port)
1656 dwc2_port_suspend(hsotg, windex);
1659 case USB_PORT_FEAT_POWER:
1661 "SetPortFeature - USB_PORT_FEAT_POWER\n");
1662 hprt0 = dwc2_read_hprt0(hsotg);
1664 writel(hprt0, hsotg->regs + HPRT0);
1667 case USB_PORT_FEAT_RESET:
1668 hprt0 = dwc2_read_hprt0(hsotg);
1670 "SetPortFeature - USB_PORT_FEAT_RESET\n");
1671 pcgctl = readl(hsotg->regs + PCGCTL);
1672 pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK);
1673 writel(pcgctl, hsotg->regs + PCGCTL);
1674 /* ??? Original driver does this */
1675 writel(0, hsotg->regs + PCGCTL);
1677 hprt0 = dwc2_read_hprt0(hsotg);
1678 /* Clear suspend bit if resetting from suspend state */
1679 hprt0 &= ~HPRT0_SUSP;
1682 * When B-Host the Port reset bit is set in the Start
1683 * HCD Callback function, so that the reset is started
1684 * within 1ms of the HNP success interrupt
1686 if (!dwc2_hcd_is_b_host(hsotg)) {
1687 hprt0 |= HPRT0_PWR | HPRT0_RST;
1689 "In host mode, hprt0=%08x\n", hprt0);
1690 writel(hprt0, hsotg->regs + HPRT0);
1693 /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
1694 usleep_range(50000, 70000);
1695 hprt0 &= ~HPRT0_RST;
1696 writel(hprt0, hsotg->regs + HPRT0);
1697 hsotg->lx_state = DWC2_L0; /* Now back to On state */
1700 case USB_PORT_FEAT_INDICATOR:
1702 "SetPortFeature - USB_PORT_FEAT_INDICATOR\n");
1709 "SetPortFeature %1xh unknown or unsupported\n",
1719 "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n",
1720 typereq, windex, wvalue);
1727 static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port)
1734 retval = (hsotg->flags.b.port_connect_status_change ||
1735 hsotg->flags.b.port_reset_change ||
1736 hsotg->flags.b.port_enable_change ||
1737 hsotg->flags.b.port_suspend_change ||
1738 hsotg->flags.b.port_over_current_change);
1742 "DWC OTG HCD HUB STATUS DATA: Root port status changed\n");
1743 dev_dbg(hsotg->dev, " port_connect_status_change: %d\n",
1744 hsotg->flags.b.port_connect_status_change);
1745 dev_dbg(hsotg->dev, " port_reset_change: %d\n",
1746 hsotg->flags.b.port_reset_change);
1747 dev_dbg(hsotg->dev, " port_enable_change: %d\n",
1748 hsotg->flags.b.port_enable_change);
1749 dev_dbg(hsotg->dev, " port_suspend_change: %d\n",
1750 hsotg->flags.b.port_suspend_change);
1751 dev_dbg(hsotg->dev, " port_over_current_change: %d\n",
1752 hsotg->flags.b.port_over_current_change);
1758 int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg)
1760 u32 hfnum = readl(hsotg->regs + HFNUM);
1762 #ifdef DWC2_DEBUG_SOF
1763 dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n",
1764 hfnum >> HFNUM_FRNUM_SHIFT &
1765 HFNUM_FRNUM_MASK >> HFNUM_FRNUM_SHIFT);
1767 return hfnum >> HFNUM_FRNUM_SHIFT &
1768 HFNUM_FRNUM_MASK >> HFNUM_FRNUM_SHIFT;
1771 int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg)
1773 return (hsotg->op_state == OTG_STATE_B_HOST);
1776 static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg,
1780 struct dwc2_hcd_urb *urb;
1781 u32 size = sizeof(*urb) + iso_desc_count *
1782 sizeof(struct dwc2_hcd_iso_packet_desc);
1784 urb = kzalloc(size, mem_flags);
1786 urb->packet_count = iso_desc_count;
1790 static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg,
1791 struct dwc2_hcd_urb *urb, u8 dev_addr,
1792 u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps)
1795 ep_type == USB_ENDPOINT_XFER_BULK ||
1796 ep_type == USB_ENDPOINT_XFER_CONTROL)
1797 dev_vdbg(hsotg->dev,
1798 "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n",
1799 dev_addr, ep_num, ep_dir, ep_type, mps);
1800 urb->pipe_info.dev_addr = dev_addr;
1801 urb->pipe_info.ep_num = ep_num;
1802 urb->pipe_info.pipe_type = ep_type;
1803 urb->pipe_info.pipe_dir = ep_dir;
1804 urb->pipe_info.mps = mps;
1808 * NOTE: This function will be removed once the peripheral controller code
1809 * is integrated and the driver is stable
1811 void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg)
1814 struct dwc2_host_chan *chan;
1815 struct dwc2_hcd_urb *urb;
1816 struct dwc2_qtd *qtd;
1822 num_channels = hsotg->core_params->host_channels;
1823 dev_dbg(hsotg->dev, "\n");
1825 "************************************************************\n");
1826 dev_dbg(hsotg->dev, "HCD State:\n");
1827 dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels);
1829 for (i = 0; i < num_channels; i++) {
1830 chan = hsotg->hc_ptr_array[i];
1831 dev_dbg(hsotg->dev, " Channel %d:\n", i);
1833 " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
1834 chan->dev_addr, chan->ep_num, chan->ep_is_in);
1835 dev_dbg(hsotg->dev, " speed: %d\n", chan->speed);
1836 dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
1837 dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
1838 dev_dbg(hsotg->dev, " data_pid_start: %d\n",
1839 chan->data_pid_start);
1840 dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count);
1841 dev_dbg(hsotg->dev, " xfer_started: %d\n",
1842 chan->xfer_started);
1843 dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
1844 dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
1845 (unsigned long)chan->xfer_dma);
1846 dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
1847 dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count);
1848 dev_dbg(hsotg->dev, " halt_on_queue: %d\n",
1849 chan->halt_on_queue);
1850 dev_dbg(hsotg->dev, " halt_pending: %d\n",
1851 chan->halt_pending);
1852 dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
1853 dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split);
1854 dev_dbg(hsotg->dev, " complete_split: %d\n",
1855 chan->complete_split);
1856 dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr);
1857 dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port);
1858 dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos);
1859 dev_dbg(hsotg->dev, " requests: %d\n", chan->requests);
1860 dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
1862 if (chan->xfer_started) {
1863 u32 hfnum, hcchar, hctsiz, hcint, hcintmsk;
1865 hfnum = readl(hsotg->regs + HFNUM);
1866 hcchar = readl(hsotg->regs + HCCHAR(i));
1867 hctsiz = readl(hsotg->regs + HCTSIZ(i));
1868 hcint = readl(hsotg->regs + HCINT(i));
1869 hcintmsk = readl(hsotg->regs + HCINTMSK(i));
1870 dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum);
1871 dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar);
1872 dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz);
1873 dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint);
1874 dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk);
1877 if (!(chan->xfer_started && chan->qh))
1880 list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) {
1881 if (!qtd->in_process)
1884 dev_dbg(hsotg->dev, " URB Info:\n");
1885 dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n",
1889 " Dev: %d, EP: %d %s\n",
1890 dwc2_hcd_get_dev_addr(&urb->pipe_info),
1891 dwc2_hcd_get_ep_num(&urb->pipe_info),
1892 dwc2_hcd_is_pipe_in(&urb->pipe_info) ?
1895 " Max packet size: %d\n",
1896 dwc2_hcd_get_mps(&urb->pipe_info));
1898 " transfer_buffer: %p\n",
1901 " transfer_dma: %08lx\n",
1902 (unsigned long)urb->dma);
1904 " transfer_buffer_length: %d\n",
1906 dev_dbg(hsotg->dev, " actual_length: %d\n",
1907 urb->actual_length);
1912 dev_dbg(hsotg->dev, " non_periodic_channels: %d\n",
1913 hsotg->non_periodic_channels);
1914 dev_dbg(hsotg->dev, " periodic_channels: %d\n",
1915 hsotg->periodic_channels);
1916 dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs);
1917 np_tx_status = readl(hsotg->regs + GNPTXSTS);
1918 dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n",
1919 np_tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1920 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT);
1921 dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n",
1922 np_tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1923 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT);
1924 p_tx_status = readl(hsotg->regs + HPTXSTS);
1925 dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n",
1926 p_tx_status >> TXSTS_QSPCAVAIL_SHIFT &
1927 TXSTS_QSPCAVAIL_MASK >> TXSTS_QSPCAVAIL_SHIFT);
1928 dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n",
1929 p_tx_status >> TXSTS_FSPCAVAIL_SHIFT &
1930 TXSTS_FSPCAVAIL_MASK >> TXSTS_FSPCAVAIL_SHIFT);
1931 dwc2_hcd_dump_frrem(hsotg);
1932 dwc2_dump_global_registers(hsotg);
1933 dwc2_dump_host_registers(hsotg);
1935 "************************************************************\n");
1936 dev_dbg(hsotg->dev, "\n");
1941 * NOTE: This function will be removed once the peripheral controller code
1942 * is integrated and the driver is stable
1944 void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg)
1946 #ifdef DWC2_DUMP_FRREM
1947 dev_dbg(hsotg->dev, "Frame remaining at SOF:\n");
1948 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1949 hsotg->frrem_samples, hsotg->frrem_accum,
1950 hsotg->frrem_samples > 0 ?
1951 hsotg->frrem_accum / hsotg->frrem_samples : 0);
1952 dev_dbg(hsotg->dev, "\n");
1953 dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n");
1954 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1955 hsotg->hfnum_7_samples,
1956 hsotg->hfnum_7_frrem_accum,
1957 hsotg->hfnum_7_samples > 0 ?
1958 hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0);
1959 dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n");
1960 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1961 hsotg->hfnum_0_samples,
1962 hsotg->hfnum_0_frrem_accum,
1963 hsotg->hfnum_0_samples > 0 ?
1964 hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0);
1965 dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n");
1966 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1967 hsotg->hfnum_other_samples,
1968 hsotg->hfnum_other_frrem_accum,
1969 hsotg->hfnum_other_samples > 0 ?
1970 hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples :
1972 dev_dbg(hsotg->dev, "\n");
1973 dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n");
1974 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1975 hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a,
1976 hsotg->hfnum_7_samples_a > 0 ?
1977 hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0);
1978 dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n");
1979 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1980 hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a,
1981 hsotg->hfnum_0_samples_a > 0 ?
1982 hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0);
1983 dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n");
1984 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1985 hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a,
1986 hsotg->hfnum_other_samples_a > 0 ?
1987 hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a
1989 dev_dbg(hsotg->dev, "\n");
1990 dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n");
1991 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1992 hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b,
1993 hsotg->hfnum_7_samples_b > 0 ?
1994 hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0);
1995 dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n");
1996 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
1997 hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b,
1998 (hsotg->hfnum_0_samples_b > 0) ?
1999 hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0);
2000 dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n");
2001 dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
2002 hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b,
2003 (hsotg->hfnum_other_samples_b > 0) ?
2004 hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b
2009 struct wrapper_priv_data {
2010 struct dwc2_hsotg *hsotg;
2013 /* Gets the dwc2_hsotg from a usb_hcd */
2014 static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd)
2016 struct wrapper_priv_data *p;
2018 p = (struct wrapper_priv_data *) &hcd->hcd_priv;
2022 static int _dwc2_hcd_start(struct usb_hcd *hcd);
2024 void dwc2_host_start(struct dwc2_hsotg *hsotg)
2026 struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
2028 hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg);
2029 _dwc2_hcd_start(hcd);
2032 void dwc2_host_disconnect(struct dwc2_hsotg *hsotg)
2034 struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
2036 hcd->self.is_b_host = 0;
2039 void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, int *hub_addr,
2042 struct urb *urb = context;
2045 *hub_addr = urb->dev->tt->hub->devnum;
2048 *hub_port = urb->dev->ttport;
2051 int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context)
2053 struct urb *urb = context;
2055 return urb->dev->speed;
2058 static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
2061 struct usb_bus *bus = hcd_to_bus(hcd);
2064 bus->bandwidth_allocated += bw / urb->interval;
2065 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
2066 bus->bandwidth_isoc_reqs++;
2068 bus->bandwidth_int_reqs++;
2071 static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
2074 struct usb_bus *bus = hcd_to_bus(hcd);
2077 bus->bandwidth_allocated -= bw / urb->interval;
2078 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
2079 bus->bandwidth_isoc_reqs--;
2081 bus->bandwidth_int_reqs--;
2085 * Sets the final status of an URB and returns it to the upper layer. Any
2086 * required cleanup of the URB is performed.
2088 * Must be called with interrupt disabled and spinlock held
2090 void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
2097 dev_dbg(hsotg->dev, "## %s: qtd is NULL ##\n", __func__);
2102 dev_dbg(hsotg->dev, "## %s: qtd->urb is NULL ##\n", __func__);
2106 urb = qtd->urb->priv;
2108 dev_dbg(hsotg->dev, "## %s: urb->priv is NULL ##\n", __func__);
2112 urb->actual_length = dwc2_hcd_urb_get_actual_length(qtd->urb);
2115 dev_vdbg(hsotg->dev,
2116 "%s: urb %p device %d ep %d-%s status %d actual %d\n",
2117 __func__, urb, usb_pipedevice(urb->pipe),
2118 usb_pipeendpoint(urb->pipe),
2119 usb_pipein(urb->pipe) ? "IN" : "OUT", status,
2120 urb->actual_length);
2122 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS && dbg_perio()) {
2123 for (i = 0; i < urb->number_of_packets; i++)
2124 dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n",
2125 i, urb->iso_frame_desc[i].status);
2128 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
2129 urb->error_count = dwc2_hcd_urb_get_error_count(qtd->urb);
2130 for (i = 0; i < urb->number_of_packets; ++i) {
2131 urb->iso_frame_desc[i].actual_length =
2132 dwc2_hcd_urb_get_iso_desc_actual_length(
2134 urb->iso_frame_desc[i].status =
2135 dwc2_hcd_urb_get_iso_desc_status(qtd->urb, i);
2139 urb->status = status;
2141 if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
2142 urb->actual_length < urb->transfer_buffer_length)
2143 urb->status = -EREMOTEIO;
2146 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
2147 usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
2148 struct usb_host_endpoint *ep = urb->ep;
2151 dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg),
2152 dwc2_hcd_get_ep_bandwidth(hsotg, ep),
2160 spin_unlock(&hsotg->lock);
2161 usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status);
2162 spin_lock(&hsotg->lock);
2166 * Work queue function for starting the HCD when A-Cable is connected
2168 static void dwc2_hcd_start_func(struct work_struct *work)
2170 struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
2173 dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg);
2174 dwc2_host_start(hsotg);
2178 * Reset work queue function
2180 static void dwc2_hcd_reset_func(struct work_struct *work)
2182 struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
2186 dev_dbg(hsotg->dev, "USB RESET function called\n");
2187 hprt0 = dwc2_read_hprt0(hsotg);
2188 hprt0 &= ~HPRT0_RST;
2189 writel(hprt0, hsotg->regs + HPRT0);
2190 hsotg->flags.b.port_reset_change = 1;
2194 * =========================================================================
2195 * Linux HC Driver Functions
2196 * =========================================================================
2200 * Initializes the DWC_otg controller and its root hub and prepares it for host
2201 * mode operation. Activates the root port. Returns 0 on success and a negative
2202 * error code on failure.
2204 static int _dwc2_hcd_start(struct usb_hcd *hcd)
2206 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2207 struct usb_bus *bus = hcd_to_bus(hcd);
2208 unsigned long flags;
2210 dev_dbg(hsotg->dev, "DWC OTG HCD START\n");
2212 spin_lock_irqsave(&hsotg->lock, flags);
2214 hcd->state = HC_STATE_RUNNING;
2216 if (dwc2_is_device_mode(hsotg)) {
2217 spin_unlock_irqrestore(&hsotg->lock, flags);
2218 return 0; /* why 0 ?? */
2221 dwc2_hcd_reinit(hsotg);
2223 /* Initialize and connect root hub if one is not already attached */
2224 if (bus->root_hub) {
2225 dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n");
2226 /* Inform the HUB driver to resume */
2227 usb_hcd_resume_root_hub(hcd);
2230 spin_unlock_irqrestore(&hsotg->lock, flags);
2235 * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
2238 static void _dwc2_hcd_stop(struct usb_hcd *hcd)
2240 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2241 unsigned long flags;
2243 spin_lock_irqsave(&hsotg->lock, flags);
2244 dwc2_hcd_stop(hsotg);
2245 spin_unlock_irqrestore(&hsotg->lock, flags);
2247 usleep_range(1000, 3000);
2250 /* Returns the current frame number */
2251 static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd)
2253 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2255 return dwc2_hcd_get_frame_number(hsotg);
2258 static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb,
2261 #ifdef VERBOSE_DEBUG
2262 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2266 dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb);
2267 dev_vdbg(hsotg->dev, " Device address: %d\n",
2268 usb_pipedevice(urb->pipe));
2269 dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n",
2270 usb_pipeendpoint(urb->pipe),
2271 usb_pipein(urb->pipe) ? "IN" : "OUT");
2273 switch (usb_pipetype(urb->pipe)) {
2275 pipetype = "CONTROL";
2280 case PIPE_INTERRUPT:
2281 pipetype = "INTERRUPT";
2283 case PIPE_ISOCHRONOUS:
2284 pipetype = "ISOCHRONOUS";
2287 pipetype = "UNKNOWN";
2291 dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype,
2292 usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ?
2295 switch (urb->dev->speed) {
2296 case USB_SPEED_HIGH:
2299 case USB_SPEED_FULL:
2310 dev_vdbg(hsotg->dev, " Speed: %s\n", speed);
2311 dev_vdbg(hsotg->dev, " Max packet size: %d\n",
2312 usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)));
2313 dev_vdbg(hsotg->dev, " Data buffer length: %d\n",
2314 urb->transfer_buffer_length);
2315 dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n",
2316 urb->transfer_buffer, (unsigned long)urb->transfer_dma);
2317 dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n",
2318 urb->setup_packet, (unsigned long)urb->setup_dma);
2319 dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval);
2321 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
2324 for (i = 0; i < urb->number_of_packets; i++) {
2325 dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i);
2326 dev_vdbg(hsotg->dev, " offset: %d, length %d\n",
2327 urb->iso_frame_desc[i].offset,
2328 urb->iso_frame_desc[i].length);
2335 * Starts processing a USB transfer request specified by a USB Request Block
2336 * (URB). mem_flags indicates the type of memory allocation to use while
2337 * processing this URB.
2339 static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
2342 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2343 struct usb_host_endpoint *ep = urb->ep;
2344 struct dwc2_hcd_urb *dwc2_urb;
2346 int alloc_bandwidth = 0;
2351 unsigned long flags;
2354 dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n");
2355 dwc2_dump_urb_info(hcd, urb, "urb_enqueue");
2361 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
2362 usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
2363 spin_lock_irqsave(&hsotg->lock, flags);
2364 if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep))
2365 alloc_bandwidth = 1;
2366 spin_unlock_irqrestore(&hsotg->lock, flags);
2369 switch (usb_pipetype(urb->pipe)) {
2371 ep_type = USB_ENDPOINT_XFER_CONTROL;
2373 case PIPE_ISOCHRONOUS:
2374 ep_type = USB_ENDPOINT_XFER_ISOC;
2377 ep_type = USB_ENDPOINT_XFER_BULK;
2379 case PIPE_INTERRUPT:
2380 ep_type = USB_ENDPOINT_XFER_INT;
2383 dev_warn(hsotg->dev, "Wrong ep type\n");
2386 dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets,
2391 dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe),
2392 usb_pipeendpoint(urb->pipe), ep_type,
2393 usb_pipein(urb->pipe),
2394 usb_maxpacket(urb->dev, urb->pipe,
2395 !(usb_pipein(urb->pipe))));
2397 buf = urb->transfer_buffer;
2398 if (hcd->self.uses_dma) {
2400 * Calculate virtual address from physical address, because
2401 * some class driver may not fill transfer_buffer.
2402 * In Buffer DMA mode virtual address is used, when handling
2403 * non-DWORD aligned buffers.
2405 buf = bus_to_virt(urb->transfer_dma);
2408 if (!(urb->transfer_flags & URB_NO_INTERRUPT))
2409 tflags |= URB_GIVEBACK_ASAP;
2410 if (urb->transfer_flags & URB_ZERO_PACKET)
2411 tflags |= URB_SEND_ZERO_PACKET;
2413 dwc2_urb->priv = urb;
2414 dwc2_urb->buf = buf;
2415 dwc2_urb->dma = urb->transfer_dma;
2416 dwc2_urb->length = urb->transfer_buffer_length;
2417 dwc2_urb->setup_packet = urb->setup_packet;
2418 dwc2_urb->setup_dma = urb->setup_dma;
2419 dwc2_urb->flags = tflags;
2420 dwc2_urb->interval = urb->interval;
2421 dwc2_urb->status = -EINPROGRESS;
2423 for (i = 0; i < urb->number_of_packets; ++i)
2424 dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i,
2425 urb->iso_frame_desc[i].offset,
2426 urb->iso_frame_desc[i].length);
2428 urb->hcpriv = dwc2_urb;
2429 retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, &ep->hcpriv,
2435 if (alloc_bandwidth) {
2436 spin_lock_irqsave(&hsotg->lock, flags);
2437 dwc2_allocate_bus_bandwidth(hcd,
2438 dwc2_hcd_get_ep_bandwidth(hsotg, ep),
2440 spin_unlock_irqrestore(&hsotg->lock, flags);
2448 * Aborts/cancels a USB transfer request. Always returns 0 to indicate success.
2450 static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
2453 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2455 unsigned long flags;
2457 dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n");
2458 dwc2_dump_urb_info(hcd, urb, "urb_dequeue");
2460 spin_lock_irqsave(&hsotg->lock, flags);
2463 dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n");
2467 rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv);
2472 /* Higher layer software sets URB status */
2473 spin_unlock(&hsotg->lock);
2474 usb_hcd_giveback_urb(hcd, urb, status);
2475 spin_lock(&hsotg->lock);
2477 dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n");
2478 dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status);
2480 spin_unlock_irqrestore(&hsotg->lock, flags);
2486 * Frees resources in the DWC_otg controller related to a given endpoint. Also
2487 * clears state in the HCD related to the endpoint. Any URBs for the endpoint
2488 * must already be dequeued.
2490 static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd,
2491 struct usb_host_endpoint *ep)
2493 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2496 "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n",
2497 ep->desc.bEndpointAddress, ep->hcpriv);
2498 dwc2_hcd_endpoint_disable(hsotg, ep, 250);
2502 * Resets endpoint specific parameter values, in current version used to reset
2503 * the data toggle (as a WA). This function can be called from usb_clear_halt
2506 static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd,
2507 struct usb_host_endpoint *ep)
2509 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2510 int is_control = usb_endpoint_xfer_control(&ep->desc);
2511 int is_out = usb_endpoint_dir_out(&ep->desc);
2512 int epnum = usb_endpoint_num(&ep->desc);
2513 struct usb_device *udev;
2514 unsigned long flags;
2517 "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n",
2518 ep->desc.bEndpointAddress);
2520 udev = to_usb_device(hsotg->dev);
2522 spin_lock_irqsave(&hsotg->lock, flags);
2524 usb_settoggle(udev, epnum, is_out, 0);
2526 usb_settoggle(udev, epnum, !is_out, 0);
2527 dwc2_hcd_endpoint_reset(hsotg, ep);
2529 spin_unlock_irqrestore(&hsotg->lock, flags);
2533 * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
2534 * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid
2537 * This function is called by the USB core when an interrupt occurs
2539 static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd)
2541 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2543 return dwc2_handle_hcd_intr(hsotg);
2547 * Creates Status Change bitmap for the root hub and root port. The bitmap is
2548 * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1
2549 * is the status change indicator for the single root port. Returns 1 if either
2550 * change indicator is 1, otherwise returns 0.
2552 static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
2554 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2556 buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1;
2560 /* Handles hub class-specific requests */
2561 static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue,
2562 u16 windex, char *buf, u16 wlength)
2564 int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq,
2565 wvalue, windex, buf, wlength);
2569 /* Handles hub TT buffer clear completions */
2570 static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd,
2571 struct usb_host_endpoint *ep)
2573 struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
2575 unsigned long flags;
2581 spin_lock_irqsave(&hsotg->lock, flags);
2582 qh->tt_buffer_dirty = 0;
2584 if (hsotg->flags.b.port_connect_status)
2585 dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL);
2587 spin_unlock_irqrestore(&hsotg->lock, flags);
2590 static struct hc_driver dwc2_hc_driver = {
2591 .description = "dwc2_hsotg",
2592 .product_desc = "DWC OTG Controller",
2593 .hcd_priv_size = sizeof(struct wrapper_priv_data),
2595 .irq = _dwc2_hcd_irq,
2596 .flags = HCD_MEMORY | HCD_USB2,
2598 .start = _dwc2_hcd_start,
2599 .stop = _dwc2_hcd_stop,
2600 .urb_enqueue = _dwc2_hcd_urb_enqueue,
2601 .urb_dequeue = _dwc2_hcd_urb_dequeue,
2602 .endpoint_disable = _dwc2_hcd_endpoint_disable,
2603 .endpoint_reset = _dwc2_hcd_endpoint_reset,
2604 .get_frame_number = _dwc2_hcd_get_frame_number,
2606 .hub_status_data = _dwc2_hcd_hub_status_data,
2607 .hub_control = _dwc2_hcd_hub_control,
2608 .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete,
2612 * Frees secondary storage associated with the dwc2_hsotg structure contained
2613 * in the struct usb_hcd field
2615 static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
2621 dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n");
2623 /* Free memory for QH/QTD lists */
2624 dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive);
2625 dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active);
2626 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive);
2627 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready);
2628 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned);
2629 dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued);
2631 /* Free memory for the host channels */
2632 for (i = 0; i < MAX_EPS_CHANNELS; i++) {
2633 struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
2636 dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n",
2638 hsotg->hc_ptr_array[i] = NULL;
2643 if (hsotg->core_params->dma_enable > 0) {
2644 if (hsotg->status_buf) {
2645 dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE,
2647 hsotg->status_buf_dma);
2648 hsotg->status_buf = NULL;
2651 kfree(hsotg->status_buf);
2652 hsotg->status_buf = NULL;
2655 ahbcfg = readl(hsotg->regs + GAHBCFG);
2657 /* Disable all interrupts */
2658 ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
2659 writel(ahbcfg, hsotg->regs + GAHBCFG);
2660 writel(0, hsotg->regs + GINTMSK);
2662 if (hsotg->snpsid >= DWC2_CORE_REV_3_00a) {
2663 dctl = readl(hsotg->regs + DCTL);
2664 dctl |= DCTL_SFTDISCON;
2665 writel(dctl, hsotg->regs + DCTL);
2668 if (hsotg->wq_otg) {
2669 if (!cancel_work_sync(&hsotg->wf_otg))
2670 flush_workqueue(hsotg->wq_otg);
2671 destroy_workqueue(hsotg->wq_otg);
2674 kfree(hsotg->core_params);
2675 hsotg->core_params = NULL;
2676 del_timer(&hsotg->wkp_timer);
2679 static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
2681 /* Turn off all host-specific interrupts */
2682 dwc2_disable_host_interrupts(hsotg);
2684 dwc2_hcd_free(hsotg);
2688 * Sets all parameters to the given value.
2690 * Assumes that the dwc2_core_params struct contains only integers.
2692 void dwc2_set_all_params(struct dwc2_core_params *params, int value)
2694 int *p = (int *)params;
2695 size_t size = sizeof(*params) / sizeof(*p);
2698 for (i = 0; i < size; i++)
2701 EXPORT_SYMBOL_GPL(dwc2_set_all_params);
2704 * Initializes the HCD. This function allocates memory for and initializes the
2705 * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the
2706 * USB bus with the core and calls the hc_driver->start() function. It returns
2707 * a negative error on failure.
2709 int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
2710 const struct dwc2_core_params *params)
2712 struct usb_hcd *hcd;
2713 struct dwc2_host_chan *channel;
2714 u32 snpsid, gusbcfg, hcfg;
2715 int i, num_channels;
2716 int retval = -ENOMEM;
2718 dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n");
2721 * Attempt to ensure this device is really a DWC_otg Controller.
2722 * Read and verify the GSNPSID register contents. The value should be
2723 * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
2724 * as in "OTG version 2.xx" or "OTG version 3.xx".
2726 snpsid = readl(hsotg->regs + GSNPSID);
2727 if ((snpsid & 0xfffff000) != 0x4f542000 &&
2728 (snpsid & 0xfffff000) != 0x4f543000) {
2729 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", snpsid);
2735 * Store the contents of the hardware configuration registers here for
2738 hsotg->hwcfg1 = readl(hsotg->regs + GHWCFG1);
2739 hsotg->hwcfg2 = readl(hsotg->regs + GHWCFG2);
2740 hsotg->hwcfg3 = readl(hsotg->regs + GHWCFG3);
2741 hsotg->hwcfg4 = readl(hsotg->regs + GHWCFG4);
2743 dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hsotg->hwcfg1);
2744 dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hsotg->hwcfg2);
2745 dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hsotg->hwcfg3);
2746 dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hsotg->hwcfg4);
2748 /* Force host mode to get HPTXFSIZ exact power on value */
2749 gusbcfg = readl(hsotg->regs + GUSBCFG);
2750 gusbcfg |= GUSBCFG_FORCEHOSTMODE;
2751 writel(gusbcfg, hsotg->regs + GUSBCFG);
2752 usleep_range(100000, 150000);
2754 hsotg->hptxfsiz = readl(hsotg->regs + HPTXFSIZ);
2755 dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hsotg->hptxfsiz);
2756 gusbcfg = readl(hsotg->regs + GUSBCFG);
2757 gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
2758 writel(gusbcfg, hsotg->regs + GUSBCFG);
2759 usleep_range(100000, 150000);
2761 hcfg = readl(hsotg->regs + HCFG);
2762 dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg);
2763 dev_dbg(hsotg->dev, "op_mode=%0x\n",
2764 hsotg->hwcfg2 >> GHWCFG2_OP_MODE_SHIFT &
2765 GHWCFG2_OP_MODE_MASK >> GHWCFG2_OP_MODE_SHIFT);
2766 dev_dbg(hsotg->dev, "arch=%0x\n",
2767 hsotg->hwcfg2 >> GHWCFG2_ARCHITECTURE_SHIFT &
2768 GHWCFG2_ARCHITECTURE_MASK >> GHWCFG2_ARCHITECTURE_SHIFT);
2769 dev_dbg(hsotg->dev, "num_dev_ep=%d\n",
2770 hsotg->hwcfg2 >> GHWCFG2_NUM_DEV_EP_SHIFT &
2771 GHWCFG2_NUM_DEV_EP_MASK >> GHWCFG2_NUM_DEV_EP_SHIFT);
2772 dev_dbg(hsotg->dev, "max_host_chan=%d\n",
2773 hsotg->hwcfg2 >> GHWCFG2_NUM_HOST_CHAN_SHIFT &
2774 GHWCFG2_NUM_HOST_CHAN_MASK >> GHWCFG2_NUM_HOST_CHAN_SHIFT);
2775 dev_dbg(hsotg->dev, "nonperio_tx_q_depth=0x%0x\n",
2776 hsotg->hwcfg2 >> GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT &
2777 GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK >>
2778 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT);
2779 dev_dbg(hsotg->dev, "host_perio_tx_q_depth=0x%0x\n",
2780 hsotg->hwcfg2 >> GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT &
2781 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK >>
2782 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT);
2783 dev_dbg(hsotg->dev, "dev_token_q_depth=0x%0x\n",
2784 hsotg->hwcfg2 >> GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT &
2785 GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK >>
2786 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT);
2788 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
2789 hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) *
2790 FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
2791 if (!hsotg->frame_num_array)
2793 hsotg->last_frame_num_array = kzalloc(
2794 sizeof(*hsotg->last_frame_num_array) *
2795 FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
2796 if (!hsotg->last_frame_num_array)
2798 hsotg->last_frame_num = HFNUM_MAX_FRNUM;
2801 hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL);
2802 if (!hsotg->core_params)
2805 dwc2_set_all_params(hsotg->core_params, -1);
2807 /* Validate parameter values */
2808 dwc2_set_parameters(hsotg, params);
2810 /* Set device flags indicating whether the HCD supports DMA */
2811 if (hsotg->core_params->dma_enable > 0) {
2812 if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
2813 dev_warn(hsotg->dev, "can't set DMA mask\n");
2814 if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(31)) < 0)
2815 dev_warn(hsotg->dev,
2816 "can't enable workaround for >2GB RAM\n");
2818 dma_set_mask(hsotg->dev, 0);
2819 dma_set_coherent_mask(hsotg->dev, 0);
2822 hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev));
2828 spin_lock_init(&hsotg->lock);
2829 ((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg;
2833 * Disable the global interrupt until all the interrupt handlers are
2836 dwc2_disable_global_interrupts(hsotg);
2838 /* Initialize the DWC_otg core, and select the Phy type */
2839 retval = dwc2_core_init(hsotg, true, irq);
2843 /* Create new workqueue and init work */
2845 hsotg->wq_otg = create_singlethread_workqueue("dwc2");
2846 if (!hsotg->wq_otg) {
2847 dev_err(hsotg->dev, "Failed to create workqueue\n");
2850 INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change);
2852 hsotg->snpsid = readl(hsotg->regs + GSNPSID);
2853 dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x\n",
2854 hsotg->snpsid >> 12 & 0xf, hsotg->snpsid >> 8 & 0xf,
2855 hsotg->snpsid >> 4 & 0xf, hsotg->snpsid & 0xf);
2857 setup_timer(&hsotg->wkp_timer, dwc2_wakeup_detected,
2858 (unsigned long)hsotg);
2860 /* Initialize the non-periodic schedule */
2861 INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive);
2862 INIT_LIST_HEAD(&hsotg->non_periodic_sched_active);
2864 /* Initialize the periodic schedule */
2865 INIT_LIST_HEAD(&hsotg->periodic_sched_inactive);
2866 INIT_LIST_HEAD(&hsotg->periodic_sched_ready);
2867 INIT_LIST_HEAD(&hsotg->periodic_sched_assigned);
2868 INIT_LIST_HEAD(&hsotg->periodic_sched_queued);
2871 * Create a host channel descriptor for each host channel implemented
2872 * in the controller. Initialize the channel descriptor array.
2874 INIT_LIST_HEAD(&hsotg->free_hc_list);
2875 num_channels = hsotg->core_params->host_channels;
2876 memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array));
2878 for (i = 0; i < num_channels; i++) {
2879 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
2880 if (channel == NULL)
2882 channel->hc_num = i;
2883 hsotg->hc_ptr_array[i] = channel;
2886 /* Initialize hsotg start work */
2887 INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func);
2889 /* Initialize port reset work */
2890 INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func);
2893 * Allocate space for storing data on status transactions. Normally no
2894 * data is sent, but this space acts as a bit bucket. This must be
2895 * done after usb_add_hcd since that function allocates the DMA buffer
2898 if (hsotg->core_params->dma_enable > 0)
2899 hsotg->status_buf = dma_alloc_coherent(hsotg->dev,
2900 DWC2_HCD_STATUS_BUF_SIZE,
2901 &hsotg->status_buf_dma, GFP_KERNEL);
2903 hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE,
2906 if (!hsotg->status_buf)
2909 hsotg->otg_port = 1;
2910 hsotg->frame_list = NULL;
2911 hsotg->frame_list_dma = 0;
2912 hsotg->periodic_qh_count = 0;
2914 /* Initiate lx_state to L3 disconnected state */
2915 hsotg->lx_state = DWC2_L3;
2917 hcd->self.otg_port = hsotg->otg_port;
2919 /* Don't support SG list at this point */
2920 hcd->self.sg_tablesize = 0;
2923 * Finish generic HCD initialization and start the HCD. This function
2924 * allocates the DMA buffer pool, registers the USB bus, requests the
2925 * IRQ line, and calls hcd_start method.
2927 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
2931 dwc2_dump_global_registers(hsotg);
2932 dwc2_dump_host_registers(hsotg);
2933 dwc2_hcd_dump_state(hsotg);
2935 dwc2_enable_global_interrupts(hsotg);
2940 dwc2_hcd_release(hsotg);
2944 kfree(hsotg->core_params);
2946 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
2947 kfree(hsotg->last_frame_num_array);
2948 kfree(hsotg->frame_num_array);
2951 dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval);
2954 EXPORT_SYMBOL_GPL(dwc2_hcd_init);
2958 * Frees memory and resources associated with the HCD and deregisters the bus.
2960 void dwc2_hcd_remove(struct dwc2_hsotg *hsotg)
2962 struct usb_hcd *hcd;
2964 dev_dbg(hsotg->dev, "DWC OTG HCD REMOVE\n");
2966 hcd = dwc2_hsotg_to_hcd(hsotg);
2967 dev_dbg(hsotg->dev, "hsotg->hcd = %p\n", hcd);
2970 dev_dbg(hsotg->dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n",
2975 usb_remove_hcd(hcd);
2977 dwc2_hcd_release(hsotg);
2980 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
2981 kfree(hsotg->last_frame_num_array);
2982 kfree(hsotg->frame_num_array);
2985 EXPORT_SYMBOL_GPL(dwc2_hcd_remove);