| /* |
| * hcd.c - DesignWare HS OTG Controller host-mode routines |
| * |
| * Copyright (C) 2004-2013 Synopsys, Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions, and the following disclaimer, |
| * without modification. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The names of the above-listed copyright holders may not be used |
| * to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * ALTERNATIVELY, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") as published by the Free Software |
| * Foundation; either version 2 of the License, or (at your option) any |
| * later version. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This file contains the core HCD code, and implements the Linux hc_driver |
| * API |
| */ |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| #include <linux/usb.h> |
| |
| #include <linux/usb/hcd.h> |
| #include <linux/usb/ch11.h> |
| |
| #include "core.h" |
| #include "hcd.h" |
| |
| /** |
| * dwc2_dump_channel_info() - Prints the state of a host channel |
| * |
| * @hsotg: Programming view of DWC_otg controller |
| * @chan: Pointer to the channel to dump |
| * |
| * Must be called with interrupt disabled and spinlock held |
| * |
| * NOTE: This function will be removed once the peripheral controller code |
| * is integrated and the driver is stable |
| */ |
| static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg, |
| struct dwc2_host_chan *chan) |
| { |
| #ifdef VERBOSE_DEBUG |
| int num_channels = hsotg->core_params->host_channels; |
| struct dwc2_qh *qh; |
| u32 hcchar; |
| u32 hcsplt; |
| u32 hctsiz; |
| u32 hc_dma; |
| int i; |
| |
| if (chan == NULL) |
| return; |
| |
| hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); |
| hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num)); |
| hctsiz = readl(hsotg->regs + HCTSIZ(chan->hc_num)); |
| hc_dma = readl(hsotg->regs + HCDMA(chan->hc_num)); |
| |
| dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan); |
| dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", |
| hcchar, hcsplt); |
| dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", |
| hctsiz, hc_dma); |
| dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", |
| chan->dev_addr, chan->ep_num, chan->ep_is_in); |
| dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); |
| dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet); |
| dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start); |
| dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started); |
| dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); |
| dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); |
| dev_dbg(hsotg->dev, " xfer_dma: %08lx\n", |
| (unsigned long)chan->xfer_dma); |
| dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); |
| dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); |
| dev_dbg(hsotg->dev, " NP inactive sched:\n"); |
| list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive, |
| qh_list_entry) |
| dev_dbg(hsotg->dev, " %p\n", qh); |
| dev_dbg(hsotg->dev, " NP active sched:\n"); |
| list_for_each_entry(qh, &hsotg->non_periodic_sched_active, |
| qh_list_entry) |
| dev_dbg(hsotg->dev, " %p\n", qh); |
| dev_dbg(hsotg->dev, " Channels:\n"); |
| for (i = 0; i < num_channels; i++) { |
| struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i]; |
| |
| dev_dbg(hsotg->dev, " %2d: %p\n", i, chan); |
| } |
| #endif /* VERBOSE_DEBUG */ |
| } |
| |
| /* |
| * Processes all the URBs in a single list of QHs. Completes them with |
| * -ETIMEDOUT and frees the QTD. |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| static void dwc2_kill_urbs_in_qh_list(struct dwc2_hsotg *hsotg, |
| struct list_head *qh_list) |
| { |
| struct dwc2_qh *qh, *qh_tmp; |
| struct dwc2_qtd *qtd, *qtd_tmp; |
| |
| list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) { |
| list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, |
| qtd_list_entry) { |
| dwc2_host_complete(hsotg, qtd, -ETIMEDOUT); |
| dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); |
| } |
| } |
| } |
| |
| static void dwc2_qh_list_free(struct dwc2_hsotg *hsotg, |
| struct list_head *qh_list) |
| { |
| struct dwc2_qtd *qtd, *qtd_tmp; |
| struct dwc2_qh *qh, *qh_tmp; |
| unsigned long flags; |
| |
| if (!qh_list->next) |
| /* The list hasn't been initialized yet */ |
| return; |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| |
| /* Ensure there are no QTDs or URBs left */ |
| dwc2_kill_urbs_in_qh_list(hsotg, qh_list); |
| |
| list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) { |
| dwc2_hcd_qh_unlink(hsotg, qh); |
| |
| /* Free each QTD in the QH's QTD list */ |
| list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, |
| qtd_list_entry) |
| dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| dwc2_hcd_qh_free(hsotg, qh); |
| spin_lock_irqsave(&hsotg->lock, flags); |
| } |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| |
| /* |
| * Responds with an error status of -ETIMEDOUT to all URBs in the non-periodic |
| * and periodic schedules. The QTD associated with each URB is removed from |
| * the schedule and freed. This function may be called when a disconnect is |
| * detected or when the HCD is being stopped. |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| static void dwc2_kill_all_urbs(struct dwc2_hsotg *hsotg) |
| { |
| dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_inactive); |
| dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_active); |
| dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_inactive); |
| dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_ready); |
| dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_assigned); |
| dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_queued); |
| } |
| |
| /** |
| * dwc2_hcd_start() - Starts the HCD when switching to Host mode |
| * |
| * @hsotg: Pointer to struct dwc2_hsotg |
| */ |
| void dwc2_hcd_start(struct dwc2_hsotg *hsotg) |
| { |
| u32 hprt0; |
| |
| if (hsotg->op_state == OTG_STATE_B_HOST) { |
| /* |
| * Reset the port. During a HNP mode switch the reset |
| * needs to occur within 1ms and have a duration of at |
| * least 50ms. |
| */ |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 |= HPRT0_RST; |
| writel(hprt0, hsotg->regs + HPRT0); |
| } |
| |
| queue_delayed_work(hsotg->wq_otg, &hsotg->start_work, |
| msecs_to_jiffies(50)); |
| } |
| |
| /* Must be called with interrupt disabled and spinlock held */ |
| static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg) |
| { |
| int num_channels = hsotg->core_params->host_channels; |
| struct dwc2_host_chan *channel; |
| u32 hcchar; |
| int i; |
| |
| if (hsotg->core_params->dma_enable <= 0) { |
| /* Flush out any channel requests in slave mode */ |
| for (i = 0; i < num_channels; i++) { |
| channel = hsotg->hc_ptr_array[i]; |
| if (!list_empty(&channel->hc_list_entry)) |
| continue; |
| hcchar = readl(hsotg->regs + HCCHAR(i)); |
| if (hcchar & HCCHAR_CHENA) { |
| hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR); |
| hcchar |= HCCHAR_CHDIS; |
| writel(hcchar, hsotg->regs + HCCHAR(i)); |
| } |
| } |
| } |
| |
| for (i = 0; i < num_channels; i++) { |
| channel = hsotg->hc_ptr_array[i]; |
| if (!list_empty(&channel->hc_list_entry)) |
| continue; |
| hcchar = readl(hsotg->regs + HCCHAR(i)); |
| if (hcchar & HCCHAR_CHENA) { |
| /* Halt the channel */ |
| hcchar |= HCCHAR_CHDIS; |
| writel(hcchar, hsotg->regs + HCCHAR(i)); |
| } |
| |
| dwc2_hc_cleanup(hsotg, channel); |
| list_add_tail(&channel->hc_list_entry, &hsotg->free_hc_list); |
| /* |
| * Added for Descriptor DMA to prevent channel double cleanup in |
| * release_channel_ddma(), which is called from ep_disable when |
| * device disconnects |
| */ |
| channel->qh = NULL; |
| } |
| } |
| |
| /** |
| * dwc2_hcd_disconnect() - Handles disconnect of the HCD |
| * |
| * @hsotg: Pointer to struct dwc2_hsotg |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg) |
| { |
| u32 intr; |
| |
| /* Set status flags for the hub driver */ |
| hsotg->flags.b.port_connect_status_change = 1; |
| hsotg->flags.b.port_connect_status = 0; |
| |
| /* |
| * Shutdown any transfers in process by clearing the Tx FIFO Empty |
| * interrupt mask and status bits and disabling subsequent host |
| * channel interrupts. |
| */ |
| intr = readl(hsotg->regs + GINTMSK); |
| intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT); |
| writel(intr, hsotg->regs + GINTMSK); |
| intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT; |
| writel(intr, hsotg->regs + GINTSTS); |
| |
| /* |
| * Turn off the vbus power only if the core has transitioned to device |
| * mode. If still in host mode, need to keep power on to detect a |
| * reconnection. |
| */ |
| if (dwc2_is_device_mode(hsotg)) { |
| if (hsotg->op_state != OTG_STATE_A_SUSPEND) { |
| dev_dbg(hsotg->dev, "Disconnect: PortPower off\n"); |
| writel(0, hsotg->regs + HPRT0); |
| } |
| |
| dwc2_disable_host_interrupts(hsotg); |
| } |
| |
| /* Respond with an error status to all URBs in the schedule */ |
| dwc2_kill_all_urbs(hsotg); |
| |
| if (dwc2_is_host_mode(hsotg)) |
| /* Clean up any host channels that were in use */ |
| dwc2_hcd_cleanup_channels(hsotg); |
| |
| dwc2_host_disconnect(hsotg); |
| } |
| |
| /** |
| * dwc2_hcd_rem_wakeup() - Handles Remote Wakeup |
| * |
| * @hsotg: Pointer to struct dwc2_hsotg |
| */ |
| static void dwc2_hcd_rem_wakeup(struct dwc2_hsotg *hsotg) |
| { |
| if (hsotg->lx_state == DWC2_L2) |
| hsotg->flags.b.port_suspend_change = 1; |
| else |
| hsotg->flags.b.port_l1_change = 1; |
| } |
| |
| /** |
| * dwc2_hcd_stop() - Halts the DWC_otg host mode operations in a clean manner |
| * |
| * @hsotg: Pointer to struct dwc2_hsotg |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| void dwc2_hcd_stop(struct dwc2_hsotg *hsotg) |
| { |
| dev_dbg(hsotg->dev, "DWC OTG HCD STOP\n"); |
| |
| /* |
| * The root hub should be disconnected before this function is called. |
| * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue) |
| * and the QH lists (via ..._hcd_endpoint_disable). |
| */ |
| |
| /* Turn off all host-specific interrupts */ |
| dwc2_disable_host_interrupts(hsotg); |
| |
| /* Turn off the vbus power */ |
| dev_dbg(hsotg->dev, "PortPower off\n"); |
| writel(0, hsotg->regs + HPRT0); |
| } |
| |
| static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg, |
| struct dwc2_hcd_urb *urb, void **ep_handle, |
| gfp_t mem_flags) |
| { |
| struct dwc2_qtd *qtd; |
| unsigned long flags; |
| u32 intr_mask; |
| int retval; |
| int dev_speed; |
| |
| if (!hsotg->flags.b.port_connect_status) { |
| /* No longer connected */ |
| dev_err(hsotg->dev, "Not connected\n"); |
| return -ENODEV; |
| } |
| |
| dev_speed = dwc2_host_get_speed(hsotg, urb->priv); |
| |
| /* Some configurations cannot support LS traffic on a FS root port */ |
| if ((dev_speed == USB_SPEED_LOW) && |
| (hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) && |
| (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI)) { |
| u32 hprt0 = readl(hsotg->regs + HPRT0); |
| u32 prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; |
| |
| if (prtspd == HPRT0_SPD_FULL_SPEED) |
| return -ENODEV; |
| } |
| |
| qtd = kzalloc(sizeof(*qtd), mem_flags); |
| if (!qtd) |
| return -ENOMEM; |
| |
| dwc2_hcd_qtd_init(qtd, urb); |
| retval = dwc2_hcd_qtd_add(hsotg, qtd, (struct dwc2_qh **)ep_handle, |
| mem_flags); |
| if (retval) { |
| dev_err(hsotg->dev, |
| "DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n", |
| retval); |
| kfree(qtd); |
| return retval; |
| } |
| |
| intr_mask = readl(hsotg->regs + GINTMSK); |
| if (!(intr_mask & GINTSTS_SOF)) { |
| enum dwc2_transaction_type tr_type; |
| |
| if (qtd->qh->ep_type == USB_ENDPOINT_XFER_BULK && |
| !(qtd->urb->flags & URB_GIVEBACK_ASAP)) |
| /* |
| * Do not schedule SG transactions until qtd has |
| * URB_GIVEBACK_ASAP set |
| */ |
| return 0; |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| tr_type = dwc2_hcd_select_transactions(hsotg); |
| if (tr_type != DWC2_TRANSACTION_NONE) |
| dwc2_hcd_queue_transactions(hsotg, tr_type); |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| |
| return 0; |
| } |
| |
| /* Must be called with interrupt disabled and spinlock held */ |
| static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg, |
| struct dwc2_hcd_urb *urb) |
| { |
| struct dwc2_qh *qh; |
| struct dwc2_qtd *urb_qtd; |
| |
| urb_qtd = urb->qtd; |
| if (!urb_qtd) { |
| dev_dbg(hsotg->dev, "## Urb QTD is NULL ##\n"); |
| return -EINVAL; |
| } |
| |
| qh = urb_qtd->qh; |
| if (!qh) { |
| dev_dbg(hsotg->dev, "## Urb QTD QH is NULL ##\n"); |
| return -EINVAL; |
| } |
| |
| urb->priv = NULL; |
| |
| if (urb_qtd->in_process && qh->channel) { |
| dwc2_dump_channel_info(hsotg, qh->channel); |
| |
| /* The QTD is in process (it has been assigned to a channel) */ |
| if (hsotg->flags.b.port_connect_status) |
| /* |
| * If still connected (i.e. in host mode), halt the |
| * channel so it can be used for other transfers. If |
| * no longer connected, the host registers can't be |
| * written to halt the channel since the core is in |
| * device mode. |
| */ |
| dwc2_hc_halt(hsotg, qh->channel, |
| DWC2_HC_XFER_URB_DEQUEUE); |
| } |
| |
| /* |
| * Free the QTD and clean up the associated QH. Leave the QH in the |
| * schedule if it has any remaining QTDs. |
| */ |
| if (hsotg->core_params->dma_desc_enable <= 0) { |
| u8 in_process = urb_qtd->in_process; |
| |
| dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); |
| if (in_process) { |
| dwc2_hcd_qh_deactivate(hsotg, qh, 0); |
| qh->channel = NULL; |
| } else if (list_empty(&qh->qtd_list)) { |
| dwc2_hcd_qh_unlink(hsotg, qh); |
| } |
| } else { |
| dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); |
| } |
| |
| return 0; |
| } |
| |
| /* Must NOT be called with interrupt disabled or spinlock held */ |
| static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg, |
| struct usb_host_endpoint *ep, int retry) |
| { |
| struct dwc2_qtd *qtd, *qtd_tmp; |
| struct dwc2_qh *qh; |
| unsigned long flags; |
| int rc; |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| |
| qh = ep->hcpriv; |
| if (!qh) { |
| rc = -EINVAL; |
| goto err; |
| } |
| |
| while (!list_empty(&qh->qtd_list) && retry--) { |
| if (retry == 0) { |
| dev_err(hsotg->dev, |
| "## timeout in dwc2_hcd_endpoint_disable() ##\n"); |
| rc = -EBUSY; |
| goto err; |
| } |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| usleep_range(20000, 40000); |
| spin_lock_irqsave(&hsotg->lock, flags); |
| qh = ep->hcpriv; |
| if (!qh) { |
| rc = -EINVAL; |
| goto err; |
| } |
| } |
| |
| dwc2_hcd_qh_unlink(hsotg, qh); |
| |
| /* Free each QTD in the QH's QTD list */ |
| list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) |
| dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); |
| |
| ep->hcpriv = NULL; |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| dwc2_hcd_qh_free(hsotg, qh); |
| |
| return 0; |
| |
| err: |
| ep->hcpriv = NULL; |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| |
| return rc; |
| } |
| |
| /* Must be called with interrupt disabled and spinlock held */ |
| static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg, |
| struct usb_host_endpoint *ep) |
| { |
| struct dwc2_qh *qh = ep->hcpriv; |
| |
| if (!qh) |
| return -EINVAL; |
| |
| qh->data_toggle = DWC2_HC_PID_DATA0; |
| |
| return 0; |
| } |
| |
| /* |
| * Initializes dynamic portions of the DWC_otg HCD state |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg) |
| { |
| struct dwc2_host_chan *chan, *chan_tmp; |
| int num_channels; |
| int i; |
| |
| hsotg->flags.d32 = 0; |
| hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active; |
| |
| if (hsotg->core_params->uframe_sched > 0) { |
| hsotg->available_host_channels = |
| hsotg->core_params->host_channels; |
| } else { |
| hsotg->non_periodic_channels = 0; |
| hsotg->periodic_channels = 0; |
| } |
| |
| /* |
| * Put all channels in the free channel list and clean up channel |
| * states |
| */ |
| list_for_each_entry_safe(chan, chan_tmp, &hsotg->free_hc_list, |
| hc_list_entry) |
| list_del_init(&chan->hc_list_entry); |
| |
| num_channels = hsotg->core_params->host_channels; |
| for (i = 0; i < num_channels; i++) { |
| chan = hsotg->hc_ptr_array[i]; |
| list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list); |
| dwc2_hc_cleanup(hsotg, chan); |
| } |
| |
| /* Initialize the DWC core for host mode operation */ |
| dwc2_core_host_init(hsotg); |
| } |
| |
| static void dwc2_hc_init_split(struct dwc2_hsotg *hsotg, |
| struct dwc2_host_chan *chan, |
| struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb) |
| { |
| int hub_addr, hub_port; |
| |
| chan->do_split = 1; |
| chan->xact_pos = qtd->isoc_split_pos; |
| chan->complete_split = qtd->complete_split; |
| dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port); |
| chan->hub_addr = (u8)hub_addr; |
| chan->hub_port = (u8)hub_port; |
| } |
| |
| static void *dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg, |
| struct dwc2_host_chan *chan, |
| struct dwc2_qtd *qtd, void *bufptr) |
| { |
| struct dwc2_hcd_urb *urb = qtd->urb; |
| struct dwc2_hcd_iso_packet_desc *frame_desc; |
| |
| switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) { |
| case USB_ENDPOINT_XFER_CONTROL: |
| chan->ep_type = USB_ENDPOINT_XFER_CONTROL; |
| |
| switch (qtd->control_phase) { |
| case DWC2_CONTROL_SETUP: |
| dev_vdbg(hsotg->dev, " Control setup transaction\n"); |
| chan->do_ping = 0; |
| chan->ep_is_in = 0; |
| chan->data_pid_start = DWC2_HC_PID_SETUP; |
| if (hsotg->core_params->dma_enable > 0) |
| chan->xfer_dma = urb->setup_dma; |
| else |
| chan->xfer_buf = urb->setup_packet; |
| chan->xfer_len = 8; |
| bufptr = NULL; |
| break; |
| |
| case DWC2_CONTROL_DATA: |
| dev_vdbg(hsotg->dev, " Control data transaction\n"); |
| chan->data_pid_start = qtd->data_toggle; |
| break; |
| |
| case DWC2_CONTROL_STATUS: |
| /* |
| * Direction is opposite of data direction or IN if no |
| * data |
| */ |
| dev_vdbg(hsotg->dev, " Control status transaction\n"); |
| if (urb->length == 0) |
| chan->ep_is_in = 1; |
| else |
| chan->ep_is_in = |
| dwc2_hcd_is_pipe_out(&urb->pipe_info); |
| if (chan->ep_is_in) |
| chan->do_ping = 0; |
| chan->data_pid_start = DWC2_HC_PID_DATA1; |
| chan->xfer_len = 0; |
| if (hsotg->core_params->dma_enable > 0) |
| chan->xfer_dma = hsotg->status_buf_dma; |
| else |
| chan->xfer_buf = hsotg->status_buf; |
| bufptr = NULL; |
| break; |
| } |
| break; |
| |
| case USB_ENDPOINT_XFER_BULK: |
| chan->ep_type = USB_ENDPOINT_XFER_BULK; |
| break; |
| |
| case USB_ENDPOINT_XFER_INT: |
| chan->ep_type = USB_ENDPOINT_XFER_INT; |
| break; |
| |
| case USB_ENDPOINT_XFER_ISOC: |
| chan->ep_type = USB_ENDPOINT_XFER_ISOC; |
| if (hsotg->core_params->dma_desc_enable > 0) |
| break; |
| |
| frame_desc = &urb->iso_descs[qtd->isoc_frame_index]; |
| frame_desc->status = 0; |
| |
| if (hsotg->core_params->dma_enable > 0) { |
| chan->xfer_dma = urb->dma; |
| chan->xfer_dma += frame_desc->offset + |
| qtd->isoc_split_offset; |
| } else { |
| chan->xfer_buf = urb->buf; |
| chan->xfer_buf += frame_desc->offset + |
| qtd->isoc_split_offset; |
| } |
| |
| chan->xfer_len = frame_desc->length - qtd->isoc_split_offset; |
| |
| /* For non-dword aligned buffers */ |
| if (hsotg->core_params->dma_enable > 0 && |
| (chan->xfer_dma & 0x3)) |
| bufptr = (u8 *)urb->buf + frame_desc->offset + |
| qtd->isoc_split_offset; |
| else |
| bufptr = NULL; |
| |
| if (chan->xact_pos == DWC2_HCSPLT_XACTPOS_ALL) { |
| if (chan->xfer_len <= 188) |
| chan->xact_pos = DWC2_HCSPLT_XACTPOS_ALL; |
| else |
| chan->xact_pos = DWC2_HCSPLT_XACTPOS_BEGIN; |
| } |
| break; |
| } |
| |
| return bufptr; |
| } |
| |
| static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, |
| struct dwc2_host_chan *chan, void *bufptr) |
| { |
| u32 buf_size; |
| |
| if (chan->ep_type != USB_ENDPOINT_XFER_ISOC) |
| buf_size = hsotg->core_params->max_transfer_size; |
| else |
| buf_size = 4096; |
| |
| if (!qh->dw_align_buf) { |
| qh->dw_align_buf = dma_alloc_coherent(hsotg->dev, buf_size, |
| &qh->dw_align_buf_dma, |
| GFP_ATOMIC); |
| if (!qh->dw_align_buf) |
| return -ENOMEM; |
| } |
| |
| if (!chan->ep_is_in && chan->xfer_len) { |
| dma_sync_single_for_cpu(hsotg->dev, chan->xfer_dma, buf_size, |
| DMA_TO_DEVICE); |
| memcpy(qh->dw_align_buf, bufptr, chan->xfer_len); |
| dma_sync_single_for_device(hsotg->dev, chan->xfer_dma, buf_size, |
| DMA_TO_DEVICE); |
| } |
| |
| chan->align_buf = qh->dw_align_buf_dma; |
| return 0; |
| } |
| |
| /** |
| * dwc2_assign_and_init_hc() - Assigns transactions from a QTD to a free host |
| * channel and initializes the host channel to perform the transactions. The |
| * host channel is removed from the free list. |
| * |
| * @hsotg: The HCD state structure |
| * @qh: Transactions from the first QTD for this QH are selected and assigned |
| * to a free host channel |
| */ |
| static int dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| { |
| struct dwc2_host_chan *chan; |
| struct dwc2_hcd_urb *urb; |
| struct dwc2_qtd *qtd; |
| void *bufptr = NULL; |
| |
| if (dbg_qh(qh)) |
| dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh); |
| |
| if (list_empty(&qh->qtd_list)) { |
| dev_dbg(hsotg->dev, "No QTDs in QH list\n"); |
| return -ENOMEM; |
| } |
| |
| if (list_empty(&hsotg->free_hc_list)) { |
| dev_dbg(hsotg->dev, "No free channel to assign\n"); |
| return -ENOMEM; |
| } |
| |
| chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan, |
| hc_list_entry); |
| |
| /* Remove host channel from free list */ |
| list_del_init(&chan->hc_list_entry); |
| |
| qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry); |
| urb = qtd->urb; |
| qh->channel = chan; |
| qtd->in_process = 1; |
| |
| /* |
| * Use usb_pipedevice to determine device address. This address is |
| * 0 before the SET_ADDRESS command and the correct address afterward. |
| */ |
| chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info); |
| chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info); |
| chan->speed = qh->dev_speed; |
| chan->max_packet = dwc2_max_packet(qh->maxp); |
| |
| chan->xfer_started = 0; |
| chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS; |
| chan->error_state = (qtd->error_count > 0); |
| chan->halt_on_queue = 0; |
| chan->halt_pending = 0; |
| chan->requests = 0; |
| |
| /* |
| * The following values may be modified in the transfer type section |
| * below. The xfer_len value may be reduced when the transfer is |
| * started to accommodate the max widths of the XferSize and PktCnt |
| * fields in the HCTSIZn register. |
| */ |
| |
| chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0); |
| if (chan->ep_is_in) |
| chan->do_ping = 0; |
| else |
| chan->do_ping = qh->ping_state; |
| |
| chan->data_pid_start = qh->data_toggle; |
| chan->multi_count = 1; |
| |
| if (urb->actual_length > urb->length && |
| !dwc2_hcd_is_pipe_in(&urb->pipe_info)) |
| urb->actual_length = urb->length; |
| |
| if (hsotg->core_params->dma_enable > 0) { |
| chan->xfer_dma = urb->dma + urb->actual_length; |
| |
| /* For non-dword aligned case */ |
| if (hsotg->core_params->dma_desc_enable <= 0 && |
| (chan->xfer_dma & 0x3)) |
| bufptr = (u8 *)urb->buf + urb->actual_length; |
| } else { |
| chan->xfer_buf = (u8 *)urb->buf + urb->actual_length; |
| } |
| |
| chan->xfer_len = urb->length - urb->actual_length; |
| chan->xfer_count = 0; |
| |
| /* Set the split attributes if required */ |
| if (qh->do_split) |
| dwc2_hc_init_split(hsotg, chan, qtd, urb); |
| else |
| chan->do_split = 0; |
| |
| /* Set the transfer attributes */ |
| bufptr = dwc2_hc_init_xfer(hsotg, chan, qtd, bufptr); |
| |
| /* Non DWORD-aligned buffer case */ |
| if (bufptr) { |
| dev_vdbg(hsotg->dev, "Non-aligned buffer\n"); |
| if (dwc2_hc_setup_align_buf(hsotg, qh, chan, bufptr)) { |
| dev_err(hsotg->dev, |
| "%s: Failed to allocate memory to handle non-dword aligned buffer\n", |
| __func__); |
| /* Add channel back to free list */ |
| chan->align_buf = 0; |
| chan->multi_count = 0; |
| list_add_tail(&chan->hc_list_entry, |
| &hsotg->free_hc_list); |
| qtd->in_process = 0; |
| qh->channel = NULL; |
| return -ENOMEM; |
| } |
| } else { |
| chan->align_buf = 0; |
| } |
| |
| if (chan->ep_type == USB_ENDPOINT_XFER_INT || |
| chan->ep_type == USB_ENDPOINT_XFER_ISOC) |
| /* |
| * This value may be modified when the transfer is started |
| * to reflect the actual transfer length |
| */ |
| chan->multi_count = dwc2_hb_mult(qh->maxp); |
| |
| if (hsotg->core_params->dma_desc_enable > 0) |
| chan->desc_list_addr = qh->desc_list_dma; |
| |
| dwc2_hc_init(hsotg, chan); |
| chan->qh = qh; |
| |
| return 0; |
| } |
| |
| /** |
| * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer |
| * schedule and assigns them to available host channels. Called from the HCD |
| * interrupt handler functions. |
| * |
| * @hsotg: The HCD state structure |
| * |
| * Return: The types of new transactions that were assigned to host channels |
| */ |
| enum dwc2_transaction_type dwc2_hcd_select_transactions( |
| struct dwc2_hsotg *hsotg) |
| { |
| enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE; |
| struct list_head *qh_ptr; |
| struct dwc2_qh *qh; |
| int num_channels; |
| |
| #ifdef DWC2_DEBUG_SOF |
| dev_vdbg(hsotg->dev, " Select Transactions\n"); |
| #endif |
| |
| /* Process entries in the periodic ready list */ |
| qh_ptr = hsotg->periodic_sched_ready.next; |
| while (qh_ptr != &hsotg->periodic_sched_ready) { |
| if (list_empty(&hsotg->free_hc_list)) |
| break; |
| if (hsotg->core_params->uframe_sched > 0) { |
| if (hsotg->available_host_channels <= 1) |
| break; |
| hsotg->available_host_channels--; |
| } |
| qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); |
| if (dwc2_assign_and_init_hc(hsotg, qh)) |
| break; |
| |
| /* |
| * Move the QH from the periodic ready schedule to the |
| * periodic assigned schedule |
| */ |
| qh_ptr = qh_ptr->next; |
| list_move(&qh->qh_list_entry, &hsotg->periodic_sched_assigned); |
| ret_val = DWC2_TRANSACTION_PERIODIC; |
| } |
| |
| /* |
| * Process entries in the inactive portion of the non-periodic |
| * schedule. Some free host channels may not be used if they are |
| * reserved for periodic transfers. |
| */ |
| num_channels = hsotg->core_params->host_channels; |
| qh_ptr = hsotg->non_periodic_sched_inactive.next; |
| while (qh_ptr != &hsotg->non_periodic_sched_inactive) { |
| if (hsotg->core_params->uframe_sched <= 0 && |
| hsotg->non_periodic_channels >= num_channels - |
| hsotg->periodic_channels) |
| break; |
| if (list_empty(&hsotg->free_hc_list)) |
| break; |
| qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); |
| if (hsotg->core_params->uframe_sched > 0) { |
| if (hsotg->available_host_channels < 1) |
| break; |
| hsotg->available_host_channels--; |
| } |
| |
| if (dwc2_assign_and_init_hc(hsotg, qh)) |
| break; |
| |
| /* |
| * Move the QH from the non-periodic inactive schedule to the |
| * non-periodic active schedule |
| */ |
| qh_ptr = qh_ptr->next; |
| list_move(&qh->qh_list_entry, |
| &hsotg->non_periodic_sched_active); |
| |
| if (ret_val == DWC2_TRANSACTION_NONE) |
| ret_val = DWC2_TRANSACTION_NON_PERIODIC; |
| else |
| ret_val = DWC2_TRANSACTION_ALL; |
| |
| if (hsotg->core_params->uframe_sched <= 0) |
| hsotg->non_periodic_channels++; |
| } |
| |
| return ret_val; |
| } |
| |
| /** |
| * dwc2_queue_transaction() - Attempts to queue a single transaction request for |
| * a host channel associated with either a periodic or non-periodic transfer |
| * |
| * @hsotg: The HCD state structure |
| * @chan: Host channel descriptor associated with either a periodic or |
| * non-periodic transfer |
| * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO |
| * for periodic transfers or the non-periodic Tx FIFO |
| * for non-periodic transfers |
| * |
| * Return: 1 if a request is queued and more requests may be needed to |
| * complete the transfer, 0 if no more requests are required for this |
| * transfer, -1 if there is insufficient space in the Tx FIFO |
| * |
| * This function assumes that there is space available in the appropriate |
| * request queue. For an OUT transfer or SETUP transaction in Slave mode, |
| * it checks whether space is available in the appropriate Tx FIFO. |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg, |
| struct dwc2_host_chan *chan, |
| u16 fifo_dwords_avail) |
| { |
| int retval = 0; |
| |
| if (hsotg->core_params->dma_enable > 0) { |
| if (hsotg->core_params->dma_desc_enable > 0) { |
| if (!chan->xfer_started || |
| chan->ep_type == USB_ENDPOINT_XFER_ISOC) { |
| dwc2_hcd_start_xfer_ddma(hsotg, chan->qh); |
| chan->qh->ping_state = 0; |
| } |
| } else if (!chan->xfer_started) { |
| dwc2_hc_start_transfer(hsotg, chan); |
| chan->qh->ping_state = 0; |
| } |
| } else if (chan->halt_pending) { |
| /* Don't queue a request if the channel has been halted */ |
| } else if (chan->halt_on_queue) { |
| dwc2_hc_halt(hsotg, chan, chan->halt_status); |
| } else if (chan->do_ping) { |
| if (!chan->xfer_started) |
| dwc2_hc_start_transfer(hsotg, chan); |
| } else if (!chan->ep_is_in || |
| chan->data_pid_start == DWC2_HC_PID_SETUP) { |
| if ((fifo_dwords_avail * 4) >= chan->max_packet) { |
| if (!chan->xfer_started) { |
| dwc2_hc_start_transfer(hsotg, chan); |
| retval = 1; |
| } else { |
| retval = dwc2_hc_continue_transfer(hsotg, chan); |
| } |
| } else { |
| retval = -1; |
| } |
| } else { |
| if (!chan->xfer_started) { |
| dwc2_hc_start_transfer(hsotg, chan); |
| retval = 1; |
| } else { |
| retval = dwc2_hc_continue_transfer(hsotg, chan); |
| } |
| } |
| |
| return retval; |
| } |
| |
| /* |
| * Processes periodic channels for the next frame and queues transactions for |
| * these channels to the DWC_otg controller. After queueing transactions, the |
| * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions |
| * to queue as Periodic Tx FIFO or request queue space becomes available. |
| * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled. |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg) |
| { |
| struct list_head *qh_ptr; |
| struct dwc2_qh *qh; |
| u32 tx_status; |
| u32 fspcavail; |
| u32 gintmsk; |
| int status; |
| int no_queue_space = 0; |
| int no_fifo_space = 0; |
| u32 qspcavail; |
| |
| if (dbg_perio()) |
| dev_vdbg(hsotg->dev, "Queue periodic transactions\n"); |
| |
| tx_status = readl(hsotg->regs + HPTXSTS); |
| qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
| TXSTS_QSPCAVAIL_SHIFT; |
| fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
| TXSTS_FSPCAVAIL_SHIFT; |
| |
| if (dbg_perio()) { |
| dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n", |
| qspcavail); |
| dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n", |
| fspcavail); |
| } |
| |
| qh_ptr = hsotg->periodic_sched_assigned.next; |
| while (qh_ptr != &hsotg->periodic_sched_assigned) { |
| tx_status = readl(hsotg->regs + HPTXSTS); |
| qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
| TXSTS_QSPCAVAIL_SHIFT; |
| if (qspcavail == 0) { |
| no_queue_space = 1; |
| break; |
| } |
| |
| qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); |
| if (!qh->channel) { |
| qh_ptr = qh_ptr->next; |
| continue; |
| } |
| |
| /* Make sure EP's TT buffer is clean before queueing qtds */ |
| if (qh->tt_buffer_dirty) { |
| qh_ptr = qh_ptr->next; |
| continue; |
| } |
| |
| /* |
| * Set a flag if we're queuing high-bandwidth in slave mode. |
| * The flag prevents any halts to get into the request queue in |
| * the middle of multiple high-bandwidth packets getting queued. |
| */ |
| if (hsotg->core_params->dma_enable <= 0 && |
| qh->channel->multi_count > 1) |
| hsotg->queuing_high_bandwidth = 1; |
| |
| fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
| TXSTS_FSPCAVAIL_SHIFT; |
| status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail); |
| if (status < 0) { |
| no_fifo_space = 1; |
| break; |
| } |
| |
| /* |
| * In Slave mode, stay on the current transfer until there is |
| * nothing more to do or the high-bandwidth request count is |
| * reached. In DMA mode, only need to queue one request. The |
| * controller automatically handles multiple packets for |
| * high-bandwidth transfers. |
| */ |
| if (hsotg->core_params->dma_enable > 0 || status == 0 || |
| qh->channel->requests == qh->channel->multi_count) { |
| qh_ptr = qh_ptr->next; |
| /* |
| * Move the QH from the periodic assigned schedule to |
| * the periodic queued schedule |
| */ |
| list_move(&qh->qh_list_entry, |
| &hsotg->periodic_sched_queued); |
| |
| /* done queuing high bandwidth */ |
| hsotg->queuing_high_bandwidth = 0; |
| } |
| } |
| |
| if (hsotg->core_params->dma_enable <= 0) { |
| tx_status = readl(hsotg->regs + HPTXSTS); |
| qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
| TXSTS_QSPCAVAIL_SHIFT; |
| fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
| TXSTS_FSPCAVAIL_SHIFT; |
| if (dbg_perio()) { |
| dev_vdbg(hsotg->dev, |
| " P Tx Req Queue Space Avail (after queue): %d\n", |
| qspcavail); |
| dev_vdbg(hsotg->dev, |
| " P Tx FIFO Space Avail (after queue): %d\n", |
| fspcavail); |
| } |
| |
| if (!list_empty(&hsotg->periodic_sched_assigned) || |
| no_queue_space || no_fifo_space) { |
| /* |
| * May need to queue more transactions as the request |
| * queue or Tx FIFO empties. Enable the periodic Tx |
| * FIFO empty interrupt. (Always use the half-empty |
| * level to ensure that new requests are loaded as |
| * soon as possible.) |
| */ |
| gintmsk = readl(hsotg->regs + GINTMSK); |
| gintmsk |= GINTSTS_PTXFEMP; |
| writel(gintmsk, hsotg->regs + GINTMSK); |
| } else { |
| /* |
| * Disable the Tx FIFO empty interrupt since there are |
| * no more transactions that need to be queued right |
| * now. This function is called from interrupt |
| * handlers to queue more transactions as transfer |
| * states change. |
| */ |
| gintmsk = readl(hsotg->regs + GINTMSK); |
| gintmsk &= ~GINTSTS_PTXFEMP; |
| writel(gintmsk, hsotg->regs + GINTMSK); |
| } |
| } |
| } |
| |
| /* |
| * Processes active non-periodic channels and queues transactions for these |
| * channels to the DWC_otg controller. After queueing transactions, the NP Tx |
| * FIFO Empty interrupt is enabled if there are more transactions to queue as |
| * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx |
| * FIFO Empty interrupt is disabled. |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg) |
| { |
| struct list_head *orig_qh_ptr; |
| struct dwc2_qh *qh; |
| u32 tx_status; |
| u32 qspcavail; |
| u32 fspcavail; |
| u32 gintmsk; |
| int status; |
| int no_queue_space = 0; |
| int no_fifo_space = 0; |
| int more_to_do = 0; |
| |
| dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n"); |
| |
| tx_status = readl(hsotg->regs + GNPTXSTS); |
| qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
| TXSTS_QSPCAVAIL_SHIFT; |
| fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
| TXSTS_FSPCAVAIL_SHIFT; |
| dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n", |
| qspcavail); |
| dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n", |
| fspcavail); |
| |
| /* |
| * Keep track of the starting point. Skip over the start-of-list |
| * entry. |
| */ |
| if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active) |
| hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next; |
| orig_qh_ptr = hsotg->non_periodic_qh_ptr; |
| |
| /* |
| * Process once through the active list or until no more space is |
| * available in the request queue or the Tx FIFO |
| */ |
| do { |
| tx_status = readl(hsotg->regs + GNPTXSTS); |
| qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
| TXSTS_QSPCAVAIL_SHIFT; |
| if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) { |
| no_queue_space = 1; |
| break; |
| } |
| |
| qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh, |
| qh_list_entry); |
| if (!qh->channel) |
| goto next; |
| |
| /* Make sure EP's TT buffer is clean before queueing qtds */ |
| if (qh->tt_buffer_dirty) |
| goto next; |
| |
| fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
| TXSTS_FSPCAVAIL_SHIFT; |
| status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail); |
| |
| if (status > 0) { |
| more_to_do = 1; |
| } else if (status < 0) { |
| no_fifo_space = 1; |
| break; |
| } |
| next: |
| /* Advance to next QH, skipping start-of-list entry */ |
| hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next; |
| if (hsotg->non_periodic_qh_ptr == |
| &hsotg->non_periodic_sched_active) |
| hsotg->non_periodic_qh_ptr = |
| hsotg->non_periodic_qh_ptr->next; |
| } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr); |
| |
| if (hsotg->core_params->dma_enable <= 0) { |
| tx_status = readl(hsotg->regs + GNPTXSTS); |
| qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
| TXSTS_QSPCAVAIL_SHIFT; |
| fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
| TXSTS_FSPCAVAIL_SHIFT; |
| dev_vdbg(hsotg->dev, |
| " NP Tx Req Queue Space Avail (after queue): %d\n", |
| qspcavail); |
| dev_vdbg(hsotg->dev, |
| " NP Tx FIFO Space Avail (after queue): %d\n", |
| fspcavail); |
| |
| if (more_to_do || no_queue_space || no_fifo_space) { |
| /* |
| * May need to queue more transactions as the request |
| * queue or Tx FIFO empties. Enable the non-periodic |
| * Tx FIFO empty interrupt. (Always use the half-empty |
| * level to ensure that new requests are loaded as |
| * soon as possible.) |
| */ |
| gintmsk = readl(hsotg->regs + GINTMSK); |
| gintmsk |= GINTSTS_NPTXFEMP; |
| writel(gintmsk, hsotg->regs + GINTMSK); |
| } else { |
| /* |
| * Disable the Tx FIFO empty interrupt since there are |
| * no more transactions that need to be queued right |
| * now. This function is called from interrupt |
| * handlers to queue more transactions as transfer |
| * states change. |
| */ |
| gintmsk = readl(hsotg->regs + GINTMSK); |
| gintmsk &= ~GINTSTS_NPTXFEMP; |
| writel(gintmsk, hsotg->regs + GINTMSK); |
| } |
| } |
| } |
| |
| /** |
| * dwc2_hcd_queue_transactions() - Processes the currently active host channels |
| * and queues transactions for these channels to the DWC_otg controller. Called |
| * from the HCD interrupt handler functions. |
| * |
| * @hsotg: The HCD state structure |
| * @tr_type: The type(s) of transactions to queue (non-periodic, periodic, |
| * or both) |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg, |
| enum dwc2_transaction_type tr_type) |
| { |
| #ifdef DWC2_DEBUG_SOF |
| dev_vdbg(hsotg->dev, "Queue Transactions\n"); |
| #endif |
| /* Process host channels associated with periodic transfers */ |
| if ((tr_type == DWC2_TRANSACTION_PERIODIC || |
| tr_type == DWC2_TRANSACTION_ALL) && |
| !list_empty(&hsotg->periodic_sched_assigned)) |
| dwc2_process_periodic_channels(hsotg); |
| |
| /* Process host channels associated with non-periodic transfers */ |
| if (tr_type == DWC2_TRANSACTION_NON_PERIODIC || |
| tr_type == DWC2_TRANSACTION_ALL) { |
| if (!list_empty(&hsotg->non_periodic_sched_active)) { |
| dwc2_process_non_periodic_channels(hsotg); |
| } else { |
| /* |
| * Ensure NP Tx FIFO empty interrupt is disabled when |
| * there are no non-periodic transfers to process |
| */ |
| u32 gintmsk = readl(hsotg->regs + GINTMSK); |
| |
| gintmsk &= ~GINTSTS_NPTXFEMP; |
| writel(gintmsk, hsotg->regs + GINTMSK); |
| } |
| } |
| } |
| |
| static void dwc2_conn_id_status_change(struct work_struct *work) |
| { |
| struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, |
| wf_otg); |
| u32 count = 0; |
| u32 gotgctl; |
| |
| dev_dbg(hsotg->dev, "%s()\n", __func__); |
| |
| gotgctl = readl(hsotg->regs + GOTGCTL); |
| dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl); |
| dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n", |
| !!(gotgctl & GOTGCTL_CONID_B)); |
| |
| /* B-Device connector (Device Mode) */ |
| if (gotgctl & GOTGCTL_CONID_B) { |
| /* Wait for switch to device mode */ |
| dev_dbg(hsotg->dev, "connId B\n"); |
| while (!dwc2_is_device_mode(hsotg)) { |
| dev_info(hsotg->dev, |
| "Waiting for Peripheral Mode, Mode=%s\n", |
| dwc2_is_host_mode(hsotg) ? "Host" : |
| "Peripheral"); |
| usleep_range(20000, 40000); |
| if (++count > 250) |
| break; |
| } |
| if (count > 250) |
| dev_err(hsotg->dev, |
| "Connection id status change timed out\n"); |
| hsotg->op_state = OTG_STATE_B_PERIPHERAL; |
| dwc2_core_init(hsotg, false, -1); |
| dwc2_enable_global_interrupts(hsotg); |
| } else { |
| /* A-Device connector (Host Mode) */ |
| dev_dbg(hsotg->dev, "connId A\n"); |
| while (!dwc2_is_host_mode(hsotg)) { |
| dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n", |
| dwc2_is_host_mode(hsotg) ? |
| "Host" : "Peripheral"); |
| usleep_range(20000, 40000); |
| if (++count > 250) |
| break; |
| } |
| if (count > 250) |
| dev_err(hsotg->dev, |
| "Connection id status change timed out\n"); |
| hsotg->op_state = OTG_STATE_A_HOST; |
| |
| /* Initialize the Core for Host mode */ |
| dwc2_core_init(hsotg, false, -1); |
| dwc2_enable_global_interrupts(hsotg); |
| dwc2_hcd_start(hsotg); |
| } |
| } |
| |
| static void dwc2_wakeup_detected(unsigned long data) |
| { |
| struct dwc2_hsotg *hsotg = (struct dwc2_hsotg *)data; |
| u32 hprt0; |
| |
| dev_dbg(hsotg->dev, "%s()\n", __func__); |
| |
| /* |
| * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms |
| * so that OPT tests pass with all PHYs.) |
| */ |
| hprt0 = dwc2_read_hprt0(hsotg); |
| dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0); |
| hprt0 &= ~HPRT0_RES; |
| writel(hprt0, hsotg->regs + HPRT0); |
| dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n", |
| readl(hsotg->regs + HPRT0)); |
| |
| dwc2_hcd_rem_wakeup(hsotg); |
| |
| /* Change to L0 state */ |
| hsotg->lx_state = DWC2_L0; |
| } |
| |
| static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg) |
| { |
| struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); |
| |
| return hcd->self.b_hnp_enable; |
| } |
| |
| /* Must NOT be called with interrupt disabled or spinlock held */ |
| static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex) |
| { |
| unsigned long flags; |
| u32 hprt0; |
| u32 pcgctl; |
| u32 gotgctl; |
| |
| dev_dbg(hsotg->dev, "%s()\n", __func__); |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| |
| if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) { |
| gotgctl = readl(hsotg->regs + GOTGCTL); |
| gotgctl |= GOTGCTL_HSTSETHNPEN; |
| writel(gotgctl, hsotg->regs + GOTGCTL); |
| hsotg->op_state = OTG_STATE_A_SUSPEND; |
| } |
| |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 |= HPRT0_SUSP; |
| writel(hprt0, hsotg->regs + HPRT0); |
| |
| /* Update lx_state */ |
| hsotg->lx_state = DWC2_L2; |
| |
| /* Suspend the Phy Clock */ |
| pcgctl = readl(hsotg->regs + PCGCTL); |
| pcgctl |= PCGCTL_STOPPCLK; |
| writel(pcgctl, hsotg->regs + PCGCTL); |
| udelay(10); |
| |
| /* For HNP the bus must be suspended for at least 200ms */ |
| if (dwc2_host_is_b_hnp_enabled(hsotg)) { |
| pcgctl = readl(hsotg->regs + PCGCTL); |
| pcgctl &= ~PCGCTL_STOPPCLK; |
| writel(pcgctl, hsotg->regs + PCGCTL); |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| |
| usleep_range(200000, 250000); |
| } else { |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| } |
| |
| /* Handles hub class-specific requests */ |
| static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq, |
| u16 wvalue, u16 windex, char *buf, u16 wlength) |
| { |
| struct usb_hub_descriptor *hub_desc; |
| int retval = 0; |
| u32 hprt0; |
| u32 port_status; |
| u32 speed; |
| u32 pcgctl; |
| |
| switch (typereq) { |
| case ClearHubFeature: |
| dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue); |
| |
| switch (wvalue) { |
| case C_HUB_LOCAL_POWER: |
| case C_HUB_OVER_CURRENT: |
| /* Nothing required here */ |
| break; |
| |
| default: |
| retval = -EINVAL; |
| dev_err(hsotg->dev, |
| "ClearHubFeature request %1xh unknown\n", |
| wvalue); |
| } |
| break; |
| |
| case ClearPortFeature: |
| if (wvalue != USB_PORT_FEAT_L1) |
| if (!windex || windex > 1) |
| goto error; |
| switch (wvalue) { |
| case USB_PORT_FEAT_ENABLE: |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_ENABLE\n"); |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 |= HPRT0_ENA; |
| writel(hprt0, hsotg->regs + HPRT0); |
| break; |
| |
| case USB_PORT_FEAT_SUSPEND: |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_SUSPEND\n"); |
| writel(0, hsotg->regs + PCGCTL); |
| usleep_range(20000, 40000); |
| |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 |= HPRT0_RES; |
| writel(hprt0, hsotg->regs + HPRT0); |
| hprt0 &= ~HPRT0_SUSP; |
| usleep_range(100000, 150000); |
| |
| hprt0 &= ~HPRT0_RES; |
| writel(hprt0, hsotg->regs + HPRT0); |
| break; |
| |
| case USB_PORT_FEAT_POWER: |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_POWER\n"); |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 &= ~HPRT0_PWR; |
| writel(hprt0, hsotg->regs + HPRT0); |
| break; |
| |
| case USB_PORT_FEAT_INDICATOR: |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_INDICATOR\n"); |
| /* Port indicator not supported */ |
| break; |
| |
| case USB_PORT_FEAT_C_CONNECTION: |
| /* |
| * Clears driver's internal Connect Status Change flag |
| */ |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n"); |
| hsotg->flags.b.port_connect_status_change = 0; |
| break; |
| |
| case USB_PORT_FEAT_C_RESET: |
| /* Clears driver's internal Port Reset Change flag */ |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_C_RESET\n"); |
| hsotg->flags.b.port_reset_change = 0; |
| break; |
| |
| case USB_PORT_FEAT_C_ENABLE: |
| /* |
| * Clears the driver's internal Port Enable/Disable |
| * Change flag |
| */ |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n"); |
| hsotg->flags.b.port_enable_change = 0; |
| break; |
| |
| case USB_PORT_FEAT_C_SUSPEND: |
| /* |
| * Clears the driver's internal Port Suspend Change |
| * flag, which is set when resume signaling on the host |
| * port is complete |
| */ |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n"); |
| hsotg->flags.b.port_suspend_change = 0; |
| break; |
| |
| case USB_PORT_FEAT_C_PORT_L1: |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n"); |
| hsotg->flags.b.port_l1_change = 0; |
| break; |
| |
| case USB_PORT_FEAT_C_OVER_CURRENT: |
| dev_dbg(hsotg->dev, |
| "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n"); |
| hsotg->flags.b.port_over_current_change = 0; |
| break; |
| |
| default: |
| retval = -EINVAL; |
| dev_err(hsotg->dev, |
| "ClearPortFeature request %1xh unknown or unsupported\n", |
| wvalue); |
| } |
| break; |
| |
| case GetHubDescriptor: |
| dev_dbg(hsotg->dev, "GetHubDescriptor\n"); |
| hub_desc = (struct usb_hub_descriptor *)buf; |
| hub_desc->bDescLength = 9; |
| hub_desc->bDescriptorType = 0x29; |
| hub_desc->bNbrPorts = 1; |
| hub_desc->wHubCharacteristics = cpu_to_le16(0x08); |
| hub_desc->bPwrOn2PwrGood = 1; |
| hub_desc->bHubContrCurrent = 0; |
| hub_desc->u.hs.DeviceRemovable[0] = 0; |
| hub_desc->u.hs.DeviceRemovable[1] = 0xff; |
| break; |
| |
| case GetHubStatus: |
| dev_dbg(hsotg->dev, "GetHubStatus\n"); |
| memset(buf, 0, 4); |
| break; |
| |
| case GetPortStatus: |
| dev_vdbg(hsotg->dev, |
| "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex, |
| hsotg->flags.d32); |
| if (!windex || windex > 1) |
| goto error; |
| |
| port_status = 0; |
| if (hsotg->flags.b.port_connect_status_change) |
| port_status |= USB_PORT_STAT_C_CONNECTION << 16; |
| if (hsotg->flags.b.port_enable_change) |
| port_status |= USB_PORT_STAT_C_ENABLE << 16; |
| if (hsotg->flags.b.port_suspend_change) |
| port_status |= USB_PORT_STAT_C_SUSPEND << 16; |
| if (hsotg->flags.b.port_l1_change) |
| port_status |= USB_PORT_STAT_C_L1 << 16; |
| if (hsotg->flags.b.port_reset_change) |
| port_status |= USB_PORT_STAT_C_RESET << 16; |
| if (hsotg->flags.b.port_over_current_change) { |
| dev_warn(hsotg->dev, "Overcurrent change detected\n"); |
| port_status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
| } |
| |
| if (!hsotg->flags.b.port_connect_status) { |
| /* |
| * The port is disconnected, which means the core is |
| * either in device mode or it soon will be. Just |
| * return 0's for the remainder of the port status |
| * since the port register can't be read if the core |
| * is in device mode. |
| */ |
| *(__le32 *)buf = cpu_to_le32(port_status); |
| break; |
| } |
| |
| hprt0 = readl(hsotg->regs + HPRT0); |
| dev_vdbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0); |
| |
| if (hprt0 & HPRT0_CONNSTS) |
| port_status |= USB_PORT_STAT_CONNECTION; |
| if (hprt0 & HPRT0_ENA) |
| port_status |= USB_PORT_STAT_ENABLE; |
| if (hprt0 & HPRT0_SUSP) |
| port_status |= USB_PORT_STAT_SUSPEND; |
| if (hprt0 & HPRT0_OVRCURRACT) |
| port_status |= USB_PORT_STAT_OVERCURRENT; |
| if (hprt0 & HPRT0_RST) |
| port_status |= USB_PORT_STAT_RESET; |
| if (hprt0 & HPRT0_PWR) |
| port_status |= USB_PORT_STAT_POWER; |
| |
| speed = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; |
| if (speed == HPRT0_SPD_HIGH_SPEED) |
| port_status |= USB_PORT_STAT_HIGH_SPEED; |
| else if (speed == HPRT0_SPD_LOW_SPEED) |
| port_status |= USB_PORT_STAT_LOW_SPEED; |
| |
| if (hprt0 & HPRT0_TSTCTL_MASK) |
| port_status |= USB_PORT_STAT_TEST; |
| /* USB_PORT_FEAT_INDICATOR unsupported always 0 */ |
| |
| dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status); |
| *(__le32 *)buf = cpu_to_le32(port_status); |
| break; |
| |
| case SetHubFeature: |
| dev_dbg(hsotg->dev, "SetHubFeature\n"); |
| /* No HUB features supported */ |
| break; |
| |
| case SetPortFeature: |
| dev_dbg(hsotg->dev, "SetPortFeature\n"); |
| if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1)) |
| goto error; |
| |
| if (!hsotg->flags.b.port_connect_status) { |
| /* |
| * The port is disconnected, which means the core is |
| * either in device mode or it soon will be. Just |
| * return without doing anything since the port |
| * register can't be written if the core is in device |
| * mode. |
| */ |
| break; |
| } |
| |
| switch (wvalue) { |
| case USB_PORT_FEAT_SUSPEND: |
| dev_dbg(hsotg->dev, |
| "SetPortFeature - USB_PORT_FEAT_SUSPEND\n"); |
| if (windex != hsotg->otg_port) |
| goto error; |
| dwc2_port_suspend(hsotg, windex); |
| break; |
| |
| case USB_PORT_FEAT_POWER: |
| dev_dbg(hsotg->dev, |
| "SetPortFeature - USB_PORT_FEAT_POWER\n"); |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 |= HPRT0_PWR; |
| writel(hprt0, hsotg->regs + HPRT0); |
| break; |
| |
| case USB_PORT_FEAT_RESET: |
| hprt0 = dwc2_read_hprt0(hsotg); |
| dev_dbg(hsotg->dev, |
| "SetPortFeature - USB_PORT_FEAT_RESET\n"); |
| pcgctl = readl(hsotg->regs + PCGCTL); |
| pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK); |
| writel(pcgctl, hsotg->regs + PCGCTL); |
| /* ??? Original driver does this */ |
| writel(0, hsotg->regs + PCGCTL); |
| |
| hprt0 = dwc2_read_hprt0(hsotg); |
| /* Clear suspend bit if resetting from suspend state */ |
| hprt0 &= ~HPRT0_SUSP; |
| |
| /* |
| * When B-Host the Port reset bit is set in the Start |
| * HCD Callback function, so that the reset is started |
| * within 1ms of the HNP success interrupt |
| */ |
| if (!dwc2_hcd_is_b_host(hsotg)) { |
| hprt0 |= HPRT0_PWR | HPRT0_RST; |
| dev_dbg(hsotg->dev, |
| "In host mode, hprt0=%08x\n", hprt0); |
| writel(hprt0, hsotg->regs + HPRT0); |
| } |
| |
| /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */ |
| usleep_range(50000, 70000); |
| hprt0 &= ~HPRT0_RST; |
| writel(hprt0, hsotg->regs + HPRT0); |
| hsotg->lx_state = DWC2_L0; /* Now back to On state */ |
| break; |
| |
| case USB_PORT_FEAT_INDICATOR: |
| dev_dbg(hsotg->dev, |
| "SetPortFeature - USB_PORT_FEAT_INDICATOR\n"); |
| /* Not supported */ |
| break; |
| |
| default: |
| retval = -EINVAL; |
| dev_err(hsotg->dev, |
| "SetPortFeature %1xh unknown or unsupported\n", |
| wvalue); |
| break; |
| } |
| break; |
| |
| default: |
| error: |
| retval = -EINVAL; |
| dev_dbg(hsotg->dev, |
| "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n", |
| typereq, windex, wvalue); |
| break; |
| } |
| |
| return retval; |
| } |
| |
| static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port) |
| { |
| int retval; |
| |
| if (port != 1) |
| return -EINVAL; |
| |
| retval = (hsotg->flags.b.port_connect_status_change || |
| hsotg->flags.b.port_reset_change || |
| hsotg->flags.b.port_enable_change || |
| hsotg->flags.b.port_suspend_change || |
| hsotg->flags.b.port_over_current_change); |
| |
| if (retval) { |
| dev_dbg(hsotg->dev, |
| "DWC OTG HCD HUB STATUS DATA: Root port status changed\n"); |
| dev_dbg(hsotg->dev, " port_connect_status_change: %d\n", |
| hsotg->flags.b.port_connect_status_change); |
| dev_dbg(hsotg->dev, " port_reset_change: %d\n", |
| hsotg->flags.b.port_reset_change); |
| dev_dbg(hsotg->dev, " port_enable_change: %d\n", |
| hsotg->flags.b.port_enable_change); |
| dev_dbg(hsotg->dev, " port_suspend_change: %d\n", |
| hsotg->flags.b.port_suspend_change); |
| dev_dbg(hsotg->dev, " port_over_current_change: %d\n", |
| hsotg->flags.b.port_over_current_change); |
| } |
| |
| return retval; |
| } |
| |
| int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) |
| { |
| u32 hfnum = readl(hsotg->regs + HFNUM); |
| |
| #ifdef DWC2_DEBUG_SOF |
| dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n", |
| (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT); |
| #endif |
| return (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT; |
| } |
| |
| int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg) |
| { |
| return hsotg->op_state == OTG_STATE_B_HOST; |
| } |
| |
| static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg, |
| int iso_desc_count, |
| gfp_t mem_flags) |
| { |
| struct dwc2_hcd_urb *urb; |
| u32 size = sizeof(*urb) + iso_desc_count * |
| sizeof(struct dwc2_hcd_iso_packet_desc); |
| |
| urb = kzalloc(size, mem_flags); |
| if (urb) |
| urb->packet_count = iso_desc_count; |
| return urb; |
| } |
| |
| static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg, |
| struct dwc2_hcd_urb *urb, u8 dev_addr, |
| u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps) |
| { |
| if (dbg_perio() || |
| ep_type == USB_ENDPOINT_XFER_BULK || |
| ep_type == USB_ENDPOINT_XFER_CONTROL) |
| dev_vdbg(hsotg->dev, |
| "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n", |
| dev_addr, ep_num, ep_dir, ep_type, mps); |
| urb->pipe_info.dev_addr = dev_addr; |
| urb->pipe_info.ep_num = ep_num; |
| urb->pipe_info.pipe_type = ep_type; |
| urb->pipe_info.pipe_dir = ep_dir; |
| urb->pipe_info.mps = mps; |
| } |
| |
| /* |
| * NOTE: This function will be removed once the peripheral controller code |
| * is integrated and the driver is stable |
| */ |
| void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg) |
| { |
| #ifdef DEBUG |
| struct dwc2_host_chan *chan; |
| struct dwc2_hcd_urb *urb; |
| struct dwc2_qtd *qtd; |
| int num_channels; |
| u32 np_tx_status; |
| u32 p_tx_status; |
| int i; |
| |
| num_channels = hsotg->core_params->host_channels; |
| dev_dbg(hsotg->dev, "\n"); |
| dev_dbg(hsotg->dev, |
| "************************************************************\n"); |
| dev_dbg(hsotg->dev, "HCD State:\n"); |
| dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels); |
| |
| for (i = 0; i < num_channels; i++) { |
| chan = hsotg->hc_ptr_array[i]; |
| dev_dbg(hsotg->dev, " Channel %d:\n", i); |
| dev_dbg(hsotg->dev, |
| " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", |
| chan->dev_addr, chan->ep_num, chan->ep_is_in); |
| dev_dbg(hsotg->dev, " speed: %d\n", chan->speed); |
| dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); |
| dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet); |
| dev_dbg(hsotg->dev, " data_pid_start: %d\n", |
| chan->data_pid_start); |
| dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count); |
| dev_dbg(hsotg->dev, " xfer_started: %d\n", |
| chan->xfer_started); |
| dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); |
| dev_dbg(hsotg->dev, " xfer_dma: %08lx\n", |
| (unsigned long)chan->xfer_dma); |
| dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); |
| dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count); |
| dev_dbg(hsotg->dev, " halt_on_queue: %d\n", |
| chan->halt_on_queue); |
| dev_dbg(hsotg->dev, " halt_pending: %d\n", |
| chan->halt_pending); |
| dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); |
| dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split); |
| dev_dbg(hsotg->dev, " complete_split: %d\n", |
| chan->complete_split); |
| dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr); |
| dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port); |
| dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos); |
| dev_dbg(hsotg->dev, " requests: %d\n", chan->requests); |
| dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); |
| |
| if (chan->xfer_started) { |
| u32 hfnum, hcchar, hctsiz, hcint, hcintmsk; |
| |
| hfnum = readl(hsotg->regs + HFNUM); |
| hcchar = readl(hsotg->regs + HCCHAR(i)); |
| hctsiz = readl(hsotg->regs + HCTSIZ(i)); |
| hcint = readl(hsotg->regs + HCINT(i)); |
| hcintmsk = readl(hsotg->regs + HCINTMSK(i)); |
| dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum); |
| dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar); |
| dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz); |
| dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint); |
| dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk); |
| } |
| |
| if (!(chan->xfer_started && chan->qh)) |
| continue; |
| |
| list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) { |
| if (!qtd->in_process) |
| break; |
| urb = qtd->urb; |
| dev_dbg(hsotg->dev, " URB Info:\n"); |
| dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n", |
| qtd, urb); |
| if (urb) { |
| dev_dbg(hsotg->dev, |
| " Dev: %d, EP: %d %s\n", |
| dwc2_hcd_get_dev_addr(&urb->pipe_info), |
| dwc2_hcd_get_ep_num(&urb->pipe_info), |
| dwc2_hcd_is_pipe_in(&urb->pipe_info) ? |
| "IN" : "OUT"); |
| dev_dbg(hsotg->dev, |
| " Max packet size: %d\n", |
| dwc2_hcd_get_mps(&urb->pipe_info)); |
| dev_dbg(hsotg->dev, |
| " transfer_buffer: %p\n", |
| urb->buf); |
| dev_dbg(hsotg->dev, |
| " transfer_dma: %08lx\n", |
| (unsigned long)urb->dma); |
| dev_dbg(hsotg->dev, |
| " transfer_buffer_length: %d\n", |
| urb->length); |
| dev_dbg(hsotg->dev, " actual_length: %d\n", |
| urb->actual_length); |
| } |
| } |
| } |
| |
| dev_dbg(hsotg->dev, " non_periodic_channels: %d\n", |
| hsotg->non_periodic_channels); |
| dev_dbg(hsotg->dev, " periodic_channels: %d\n", |
| hsotg->periodic_channels); |
| dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs); |
| np_tx_status = readl(hsotg->regs + GNPTXSTS); |
| dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n", |
| (np_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT); |
| dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n", |
| (np_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT); |
| p_tx_status = readl(hsotg->regs + HPTXSTS); |
| dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n", |
| (p_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT); |
| dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n", |
| (p_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT); |
| dwc2_hcd_dump_frrem(hsotg); |
| dwc2_dump_global_registers(hsotg); |
| dwc2_dump_host_registers(hsotg); |
| dev_dbg(hsotg->dev, |
| "************************************************************\n"); |
| dev_dbg(hsotg->dev, "\n"); |
| #endif |
| } |
| |
| /* |
| * NOTE: This function will be removed once the peripheral controller code |
| * is integrated and the driver is stable |
| */ |
| void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg) |
| { |
| #ifdef DWC2_DUMP_FRREM |
| dev_dbg(hsotg->dev, "Frame remaining at SOF:\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->frrem_samples, hsotg->frrem_accum, |
| hsotg->frrem_samples > 0 ? |
| hsotg->frrem_accum / hsotg->frrem_samples : 0); |
| dev_dbg(hsotg->dev, "\n"); |
| dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_7_samples, |
| hsotg->hfnum_7_frrem_accum, |
| hsotg->hfnum_7_samples > 0 ? |
| hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0); |
| dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_0_samples, |
| hsotg->hfnum_0_frrem_accum, |
| hsotg->hfnum_0_samples > 0 ? |
| hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0); |
| dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_other_samples, |
| hsotg->hfnum_other_frrem_accum, |
| hsotg->hfnum_other_samples > 0 ? |
| hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples : |
| 0); |
| dev_dbg(hsotg->dev, "\n"); |
| dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a, |
| hsotg->hfnum_7_samples_a > 0 ? |
| hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0); |
| dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a, |
| hsotg->hfnum_0_samples_a > 0 ? |
| hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0); |
| dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a, |
| hsotg->hfnum_other_samples_a > 0 ? |
| hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a |
| : 0); |
| dev_dbg(hsotg->dev, "\n"); |
| dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b, |
| hsotg->hfnum_7_samples_b > 0 ? |
| hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0); |
| dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b, |
| (hsotg->hfnum_0_samples_b > 0) ? |
| hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0); |
| dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n"); |
| dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", |
| hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b, |
| (hsotg->hfnum_other_samples_b > 0) ? |
| hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b |
| : 0); |
| #endif |
| } |
| |
| struct wrapper_priv_data { |
| struct dwc2_hsotg *hsotg; |
| }; |
| |
| /* Gets the dwc2_hsotg from a usb_hcd */ |
| static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd) |
| { |
| struct wrapper_priv_data *p; |
| |
| p = (struct wrapper_priv_data *) &hcd->hcd_priv; |
| return p->hsotg; |
| } |
| |
| static int _dwc2_hcd_start(struct usb_hcd *hcd); |
| |
| void dwc2_host_start(struct dwc2_hsotg *hsotg) |
| { |
| struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); |
| |
| hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg); |
| _dwc2_hcd_start(hcd); |
| } |
| |
| void dwc2_host_disconnect(struct dwc2_hsotg *hsotg) |
| { |
| struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); |
| |
| hcd->self.is_b_host = 0; |
| } |
| |
| void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, int *hub_addr, |
| int *hub_port) |
| { |
| struct urb *urb = context; |
| |
| if (urb->dev->tt) |
| *hub_addr = urb->dev->tt->hub->devnum; |
| else |
| *hub_addr = 0; |
| *hub_port = urb->dev->ttport; |
| } |
| |
| int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context) |
| { |
| struct urb *urb = context; |
| |
| return urb->dev->speed; |
| } |
| |
| static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw, |
| struct urb *urb) |
| { |
| struct usb_bus *bus = hcd_to_bus(hcd); |
| |
| if (urb->interval) |
| bus->bandwidth_allocated += bw / urb->interval; |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) |
| bus->bandwidth_isoc_reqs++; |
| else |
| bus->bandwidth_int_reqs++; |
| } |
| |
| static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw, |
| struct urb *urb) |
| { |
| struct usb_bus *bus = hcd_to_bus(hcd); |
| |
| if (urb->interval) |
| bus->bandwidth_allocated -= bw / urb->interval; |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) |
| bus->bandwidth_isoc_reqs--; |
| else |
| bus->bandwidth_int_reqs--; |
| } |
| |
| /* |
| * Sets the final status of an URB and returns it to the upper layer. Any |
| * required cleanup of the URB is performed. |
| * |
| * Must be called with interrupt disabled and spinlock held |
| */ |
| void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, |
| int status) |
| { |
| struct urb *urb; |
| int i; |
| |
| if (!qtd) { |
| dev_dbg(hsotg->dev, "## %s: qtd is NULL ##\n", __func__); |
| return; |
| } |
| |
| if (!qtd->urb) { |
| dev_dbg(hsotg->dev, "## %s: qtd->urb is NULL ##\n", __func__); |
| return; |
| } |
| |
| urb = qtd->urb->priv; |
| if (!urb) { |
| dev_dbg(hsotg->dev, "## %s: urb->priv is NULL ##\n", __func__); |
| return; |
| } |
| |
| urb->actual_length = dwc2_hcd_urb_get_actual_length(qtd->urb); |
| |
| if (dbg_urb(urb)) |
| dev_vdbg(hsotg->dev, |
| "%s: urb %p device %d ep %d-%s status %d actual %d\n", |
| __func__, urb, usb_pipedevice(urb->pipe), |
| usb_pipeendpoint(urb->pipe), |
| usb_pipein(urb->pipe) ? "IN" : "OUT", status, |
| urb->actual_length); |
| |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS && dbg_perio()) { |
| for (i = 0; i < urb->number_of_packets; i++) |
| dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n", |
| i, urb->iso_frame_desc[i].status); |
| } |
| |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
| urb->error_count = dwc2_hcd_urb_get_error_count(qtd->urb); |
| for (i = 0; i < urb->number_of_packets; ++i) { |
| urb->iso_frame_desc[i].actual_length = |
| dwc2_hcd_urb_get_iso_desc_actual_length( |
| qtd->urb, i); |
| urb->iso_frame_desc[i].status = |
| dwc2_hcd_urb_get_iso_desc_status(qtd->urb, i); |
| } |
| } |
| |
| urb->status = status; |
| if (!status) { |
| if ((urb->transfer_flags & URB_SHORT_NOT_OK) && |
| urb->actual_length < urb->transfer_buffer_length) |
| urb->status = -EREMOTEIO; |
| } |
| |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS || |
| usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { |
| struct usb_host_endpoint *ep = urb->ep; |
| |
| if (ep) |
| dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg), |
| dwc2_hcd_get_ep_bandwidth(hsotg, ep), |
| urb); |
| } |
| |
| usb_hcd_unlink_urb_from_ep(dwc2_hsotg_to_hcd(hsotg), urb); |
| urb->hcpriv = NULL; |
| kfree(qtd->urb); |
| qtd->urb = NULL; |
| |
| spin_unlock(&hsotg->lock); |
| usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status); |
| spin_lock(&hsotg->lock); |
| } |
| |
| /* |
| * Work queue function for starting the HCD when A-Cable is connected |
| */ |
| static void dwc2_hcd_start_func(struct work_struct *work) |
| { |
| struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, |
| start_work.work); |
| |
| dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg); |
| dwc2_host_start(hsotg); |
| } |
| |
| /* |
| * Reset work queue function |
| */ |
| static void dwc2_hcd_reset_func(struct work_struct *work) |
| { |
| struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, |
| reset_work.work); |
| u32 hprt0; |
| |
| dev_dbg(hsotg->dev, "USB RESET function called\n"); |
| hprt0 = dwc2_read_hprt0(hsotg); |
| hprt0 &= ~HPRT0_RST; |
| writel(hprt0, hsotg->regs + HPRT0); |
| hsotg->flags.b.port_reset_change = 1; |
| } |
| |
| /* |
| * ========================================================================= |
| * Linux HC Driver Functions |
| * ========================================================================= |
| */ |
| |
| /* |
| * Initializes the DWC_otg controller and its root hub and prepares it for host |
| * mode operation. Activates the root port. Returns 0 on success and a negative |
| * error code on failure. |
| */ |
| static int _dwc2_hcd_start(struct usb_hcd *hcd) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| struct usb_bus *bus = hcd_to_bus(hcd); |
| unsigned long flags; |
| |
| dev_dbg(hsotg->dev, "DWC OTG HCD START\n"); |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| |
| hcd->state = HC_STATE_RUNNING; |
| |
| if (dwc2_is_device_mode(hsotg)) { |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| return 0; /* why 0 ?? */ |
| } |
| |
| dwc2_hcd_reinit(hsotg); |
| |
| /* Initialize and connect root hub if one is not already attached */ |
| if (bus->root_hub) { |
| dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n"); |
| /* Inform the HUB driver to resume */ |
| usb_hcd_resume_root_hub(hcd); |
| } |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| return 0; |
| } |
| |
| /* |
| * Halts the DWC_otg host mode operations in a clean manner. USB transfers are |
| * stopped. |
| */ |
| static void _dwc2_hcd_stop(struct usb_hcd *hcd) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| dwc2_hcd_stop(hsotg); |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| |
| usleep_range(1000, 3000); |
| } |
| |
| /* Returns the current frame number */ |
| static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| |
| return dwc2_hcd_get_frame_number(hsotg); |
| } |
| |
| static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb, |
| char *fn_name) |
| { |
| #ifdef VERBOSE_DEBUG |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| char *pipetype; |
| char *speed; |
| |
| dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb); |
| dev_vdbg(hsotg->dev, " Device address: %d\n", |
| usb_pipedevice(urb->pipe)); |
| dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n", |
| usb_pipeendpoint(urb->pipe), |
| usb_pipein(urb->pipe) ? "IN" : "OUT"); |
| |
| switch (usb_pipetype(urb->pipe)) { |
| case PIPE_CONTROL: |
| pipetype = "CONTROL"; |
| break; |
| case PIPE_BULK: |
| pipetype = "BULK"; |
| break; |
| case PIPE_INTERRUPT: |
| pipetype = "INTERRUPT"; |
| break; |
| case PIPE_ISOCHRONOUS: |
| pipetype = "ISOCHRONOUS"; |
| break; |
| default: |
| pipetype = "UNKNOWN"; |
| break; |
| } |
| |
| dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype, |
| usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ? |
| "IN" : "OUT"); |
| |
| switch (urb->dev->speed) { |
| case USB_SPEED_HIGH: |
| speed = "HIGH"; |
| break; |
| case USB_SPEED_FULL: |
| speed = "FULL"; |
| break; |
| case USB_SPEED_LOW: |
| speed = "LOW"; |
| break; |
| default: |
| speed = "UNKNOWN"; |
| break; |
| } |
| |
| dev_vdbg(hsotg->dev, " Speed: %s\n", speed); |
| dev_vdbg(hsotg->dev, " Max packet size: %d\n", |
| usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))); |
| dev_vdbg(hsotg->dev, " Data buffer length: %d\n", |
| urb->transfer_buffer_length); |
| dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n", |
| urb->transfer_buffer, (unsigned long)urb->transfer_dma); |
| dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n", |
| urb->setup_packet, (unsigned long)urb->setup_dma); |
| dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval); |
| |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
| int i; |
| |
| for (i = 0; i < urb->number_of_packets; i++) { |
| dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i); |
| dev_vdbg(hsotg->dev, " offset: %d, length %d\n", |
| urb->iso_frame_desc[i].offset, |
| urb->iso_frame_desc[i].length); |
| } |
| } |
| #endif |
| } |
| |
| /* |
| * Starts processing a USB transfer request specified by a USB Request Block |
| * (URB). mem_flags indicates the type of memory allocation to use while |
| * processing this URB. |
| */ |
| static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| gfp_t mem_flags) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| struct usb_host_endpoint *ep = urb->ep; |
| struct dwc2_hcd_urb *dwc2_urb; |
| int i; |
| int retval; |
| int alloc_bandwidth = 0; |
| u8 ep_type = 0; |
| u32 tflags = 0; |
| void *buf; |
| unsigned long flags; |
| |
| if (dbg_urb(urb)) { |
| dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n"); |
| dwc2_dump_urb_info(hcd, urb, "urb_enqueue"); |
| } |
| |
| if (ep == NULL) |
| return -EINVAL; |
| |
| if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS || |
| usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { |
| spin_lock_irqsave(&hsotg->lock, flags); |
| if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep)) |
| alloc_bandwidth = 1; |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| |
| switch (usb_pipetype(urb->pipe)) { |
| case PIPE_CONTROL: |
| ep_type = USB_ENDPOINT_XFER_CONTROL; |
| break; |
| case PIPE_ISOCHRONOUS: |
| ep_type = USB_ENDPOINT_XFER_ISOC; |
| break; |
| case PIPE_BULK: |
| ep_type = USB_ENDPOINT_XFER_BULK; |
| break; |
| case PIPE_INTERRUPT: |
| ep_type = USB_ENDPOINT_XFER_INT; |
| break; |
| default: |
| dev_warn(hsotg->dev, "Wrong ep type\n"); |
| } |
| |
| dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets, |
| mem_flags); |
| if (!dwc2_urb) |
| return -ENOMEM; |
| |
| dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe), |
| usb_pipeendpoint(urb->pipe), ep_type, |
| usb_pipein(urb->pipe), |
| usb_maxpacket(urb->dev, urb->pipe, |
| !(usb_pipein(urb->pipe)))); |
| |
| buf = urb->transfer_buffer; |
| |
| if (hcd->self.uses_dma) { |
| if (!buf && (urb->transfer_dma & 3)) { |
| dev_err(hsotg->dev, |
| "%s: unaligned transfer with no transfer_buffer", |
| __func__); |
| retval = -EINVAL; |
| goto fail1; |
| } |
| } |
| |
| if (!(urb->transfer_flags & URB_NO_INTERRUPT)) |
| tflags |= URB_GIVEBACK_ASAP; |
| if (urb->transfer_flags & URB_ZERO_PACKET) |
| tflags |= URB_SEND_ZERO_PACKET; |
| |
| dwc2_urb->priv = urb; |
| dwc2_urb->buf = buf; |
| dwc2_urb->dma = urb->transfer_dma; |
| dwc2_urb->length = urb->transfer_buffer_length; |
| dwc2_urb->setup_packet = urb->setup_packet; |
| dwc2_urb->setup_dma = urb->setup_dma; |
| dwc2_urb->flags = tflags; |
| dwc2_urb->interval = urb->interval; |
| dwc2_urb->status = -EINPROGRESS; |
| |
| for (i = 0; i < urb->number_of_packets; ++i) |
| dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i, |
| urb->iso_frame_desc[i].offset, |
| urb->iso_frame_desc[i].length); |
| |
| urb->hcpriv = dwc2_urb; |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| retval = usb_hcd_link_urb_to_ep(hcd, urb); |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| if (retval) |
| goto fail1; |
| |
| retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, &ep->hcpriv, mem_flags); |
| if (retval) |
| goto fail2; |
| |
| if (alloc_bandwidth) { |
| spin_lock_irqsave(&hsotg->lock, flags); |
| dwc2_allocate_bus_bandwidth(hcd, |
| dwc2_hcd_get_ep_bandwidth(hsotg, ep), |
| urb); |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| |
| return 0; |
| |
| fail2: |
| spin_lock_irqsave(&hsotg->lock, flags); |
| dwc2_urb->priv = NULL; |
| usb_hcd_unlink_urb_from_ep(hcd, urb); |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| fail1: |
| urb->hcpriv = NULL; |
| kfree(dwc2_urb); |
| |
| return retval; |
| } |
| |
| /* |
| * Aborts/cancels a USB transfer request. Always returns 0 to indicate success. |
| */ |
| static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, |
| int status) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| int rc; |
| unsigned long flags; |
| |
| dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n"); |
| dwc2_dump_urb_info(hcd, urb, "urb_dequeue"); |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| |
| rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| if (rc) |
| goto out; |
| |
| if (!urb->hcpriv) { |
| dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n"); |
| goto out; |
| } |
| |
| rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv); |
| |
| usb_hcd_unlink_urb_from_ep(hcd, urb); |
| |
| kfree(urb->hcpriv); |
| urb->hcpriv = NULL; |
| |
| /* Higher layer software sets URB status */ |
| spin_unlock(&hsotg->lock); |
| usb_hcd_giveback_urb(hcd, urb, status); |
| spin_lock(&hsotg->lock); |
| |
| dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n"); |
| dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status); |
| out: |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| |
| return rc; |
| } |
| |
| /* |
| * Frees resources in the DWC_otg controller related to a given endpoint. Also |
| * clears state in the HCD related to the endpoint. Any URBs for the endpoint |
| * must already be dequeued. |
| */ |
| static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd, |
| struct usb_host_endpoint *ep) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| |
| dev_dbg(hsotg->dev, |
| "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n", |
| ep->desc.bEndpointAddress, ep->hcpriv); |
| dwc2_hcd_endpoint_disable(hsotg, ep, 250); |
| } |
| |
| /* |
| * Resets endpoint specific parameter values, in current version used to reset |
| * the data toggle (as a WA). This function can be called from usb_clear_halt |
| * routine. |
| */ |
| static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd, |
| struct usb_host_endpoint *ep) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| int is_control = usb_endpoint_xfer_control(&ep->desc); |
| int is_out = usb_endpoint_dir_out(&ep->desc); |
| int epnum = usb_endpoint_num(&ep->desc); |
| struct usb_device *udev; |
| unsigned long flags; |
| |
| dev_dbg(hsotg->dev, |
| "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n", |
| ep->desc.bEndpointAddress); |
| |
| udev = to_usb_device(hsotg->dev); |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| |
| usb_settoggle(udev, epnum, is_out, 0); |
| if (is_control) |
| usb_settoggle(udev, epnum, !is_out, 0); |
| dwc2_hcd_endpoint_reset(hsotg, ep); |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| |
| /* |
| * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if |
| * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid |
| * interrupt. |
| * |
| * This function is called by the USB core when an interrupt occurs |
| */ |
| static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| |
| return dwc2_handle_hcd_intr(hsotg); |
| } |
| |
| /* |
| * Creates Status Change bitmap for the root hub and root port. The bitmap is |
| * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1 |
| * is the status change indicator for the single root port. Returns 1 if either |
| * change indicator is 1, otherwise returns 0. |
| */ |
| static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| |
| buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1; |
| return buf[0] != 0; |
| } |
| |
| /* Handles hub class-specific requests */ |
| static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue, |
| u16 windex, char *buf, u16 wlength) |
| { |
| int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq, |
| wvalue, windex, buf, wlength); |
| return retval; |
| } |
| |
| /* Handles hub TT buffer clear completions */ |
| static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd, |
| struct usb_host_endpoint *ep) |
| { |
| struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); |
| struct dwc2_qh *qh; |
| unsigned long flags; |
| |
| qh = ep->hcpriv; |
| if (!qh) |
| return; |
| |
| spin_lock_irqsave(&hsotg->lock, flags); |
| qh->tt_buffer_dirty = 0; |
| |
| if (hsotg->flags.b.port_connect_status) |
| dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL); |
| |
| spin_unlock_irqrestore(&hsotg->lock, flags); |
| } |
| |
| static struct hc_driver dwc2_hc_driver = { |
| .description = "dwc2_hsotg", |
| .product_desc = "DWC OTG Controller", |
| .hcd_priv_size = sizeof(struct wrapper_priv_data), |
| |
| .irq = _dwc2_hcd_irq, |
| .flags = HCD_MEMORY | HCD_USB2, |
| |
| .start = _dwc2_hcd_start, |
| .stop = _dwc2_hcd_stop, |
| .urb_enqueue = _dwc2_hcd_urb_enqueue, |
| .urb_dequeue = _dwc2_hcd_urb_dequeue, |
| .endpoint_disable = _dwc2_hcd_endpoint_disable, |
| .endpoint_reset = _dwc2_hcd_endpoint_reset, |
| .get_frame_number = _dwc2_hcd_get_frame_number, |
| |
| .hub_status_data = _dwc2_hcd_hub_status_data, |
| .hub_control = _dwc2_hcd_hub_control, |
| .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete, |
| }; |
| |
| /* |
| * Frees secondary storage associated with the dwc2_hsotg structure contained |
| * in the struct usb_hcd field |
| */ |
| static void dwc2_hcd_free(struct dwc2_hsotg *hsotg) |
| { |
| u32 ahbcfg; |
| u32 dctl; |
| int i; |
| |
| dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n"); |
| |
| /* Free memory for QH/QTD lists */ |
| dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive); |
| dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active); |
| dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive); |
| dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready); |
| dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned); |
| dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued); |
| |
| /* Free memory for the host channels */ |
| for (i = 0; i < MAX_EPS_CHANNELS; i++) { |
| struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i]; |
| |
| if (chan != NULL) { |
| dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n", |
| i, chan); |
| hsotg->hc_ptr_array[i] = NULL; |
| kfree(chan); |
| } |
| } |
| |
| if (hsotg->core_params->dma_enable > 0) { |
| if (hsotg->status_buf) { |
| dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE, |
| hsotg->status_buf, |
| hsotg->status_buf_dma); |
| hsotg->status_buf = NULL; |
| } |
| } else { |
| kfree(hsotg->status_buf); |
| hsotg->status_buf = NULL; |
| } |
| |
| ahbcfg = readl(hsotg->regs + GAHBCFG); |
| |
| /* Disable all interrupts */ |
| ahbcfg &= ~GAHBCFG_GLBL_INTR_EN; |
| writel(ahbcfg, hsotg->regs + GAHBCFG); |
| writel(0, hsotg->regs + GINTMSK); |
| |
| if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a) { |
| dctl = readl(hsotg->regs + DCTL); |
| dctl |= DCTL_SFTDISCON; |
| writel(dctl, hsotg->regs + DCTL); |
| } |
| |
| if (hsotg->wq_otg) { |
| if (!cancel_work_sync(&hsotg->wf_otg)) |
| flush_workqueue(hsotg->wq_otg); |
| destroy_workqueue(hsotg->wq_otg); |
| } |
| |
| kfree(hsotg->core_params); |
| hsotg->core_params = NULL; |
| del_timer(&hsotg->wkp_timer); |
| } |
| |
| static void dwc2_hcd_release(struct dwc2_hsotg *hsotg) |
| { |
| /* Turn off all host-specific interrupts */ |
| dwc2_disable_host_interrupts(hsotg); |
| |
| dwc2_hcd_free(hsotg); |
| } |
| |
| /* |
| * Sets all parameters to the given value. |
| * |
| * Assumes that the dwc2_core_params struct contains only integers. |
| */ |
| void dwc2_set_all_params(struct dwc2_core_params *params, int value) |
| { |
| int *p = (int *)params; |
| size_t size = sizeof(*params) / sizeof(*p); |
| int i; |
| |
| for (i = 0; i < size; i++) |
| p[i] = value; |
| } |
| EXPORT_SYMBOL_GPL(dwc2_set_all_params); |
| |
| /* |
| * Initializes the HCD. This function allocates memory for and initializes the |
| * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the |
| * USB bus with the core and calls the hc_driver->start() function. It returns |
| * a negative error on failure. |
| */ |
| int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, |
| const struct dwc2_core_params *params) |
| { |
| struct usb_hcd *hcd; |
| struct dwc2_host_chan *channel; |
| u32 hcfg; |
| int i, num_channels; |
| int retval; |
| |
| dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n"); |
| |
| /* Detect config values from hardware */ |
| retval = dwc2_get_hwparams(hsotg); |
| |
| if (retval) |
| return retval; |
| |
| retval = -ENOMEM; |
| |
| hcfg = readl(hsotg->regs + HCFG); |
| dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg); |
| |
| #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS |
| hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) * |
| FRAME_NUM_ARRAY_SIZE, GFP_KERNEL); |
| if (!hsotg->frame_num_array) |
| goto error1; |
| hsotg->last_frame_num_array = kzalloc( |
| sizeof(*hsotg->last_frame_num_array) * |
| FRAME_NUM_ARRAY_SIZE, GFP_KERNEL); |
| if (!hsotg->last_frame_num_array) |
| goto error1; |
| hsotg->last_frame_num = HFNUM_MAX_FRNUM; |
| #endif |
| |
| hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL); |
| if (!hsotg->core_params) |
| goto error1; |
| |
| dwc2_set_all_params(hsotg->core_params, -1); |
| |
| /* Validate parameter values */ |
| dwc2_set_parameters(hsotg, params); |
| |
| /* Check if the bus driver or platform code has setup a dma_mask */ |
| if (hsotg->core_params->dma_enable > 0 && |
| hsotg->dev->dma_mask == NULL) { |
| dev_warn(hsotg->dev, |
| "dma_mask not set, disabling DMA\n"); |
| hsotg->core_params->dma_enable = 0; |
| hsotg->core_params->dma_desc_enable = 0; |
| } |
| |
| /* Set device flags indicating whether the HCD supports DMA */ |
| if (hsotg->core_params->dma_enable > 0) { |
| if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0) |
| dev_warn(hsotg->dev, "can't set DMA mask\n"); |
| if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0) |
| dev_warn(hsotg->dev, "can't set coherent DMA mask\n"); |
| } |
| |
| hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev)); |
| if (!hcd) |
| goto error1; |
| |
| if (hsotg->core_params->dma_enable <= 0) |
| hcd->self.uses_dma = 0; |
| |
| hcd->has_tt = 1; |
| |
| spin_lock_init(&hsotg->lock); |
| ((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg; |
| hsotg->priv = hcd; |
| |
| /* |
| * Disable the global interrupt until all the interrupt handlers are |
| * installed |
| */ |
| dwc2_disable_global_interrupts(hsotg); |
| |
| /* Initialize the DWC_otg core, and select the Phy type */ |
| retval = dwc2_core_init(hsotg, true, irq); |
| if (retval) |
| goto error2; |
| |
| /* Create new workqueue and init work */ |
| retval = -ENOMEM; |
| hsotg->wq_otg = create_singlethread_workqueue("dwc2"); |
| if (!hsotg->wq_otg) { |
| dev_err(hsotg->dev, "Failed to create workqueue\n"); |
| goto error2; |
| } |
| INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change); |
| |
| setup_timer(&hsotg->wkp_timer, dwc2_wakeup_detected, |
| (unsigned long)hsotg); |
| |
| /* Initialize the non-periodic schedule */ |
| INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive); |
| INIT_LIST_HEAD(&hsotg->non_periodic_sched_active); |
| |
| /* Initialize the periodic schedule */ |
| INIT_LIST_HEAD(&hsotg->periodic_sched_inactive); |
| INIT_LIST_HEAD(&hsotg->periodic_sched_ready); |
| INIT_LIST_HEAD(&hsotg->periodic_sched_assigned); |
| INIT_LIST_HEAD(&hsotg->periodic_sched_queued); |
| |
| /* |
| * Create a host channel descriptor for each host channel implemented |
| * in the controller. Initialize the channel descriptor array. |
| */ |
| INIT_LIST_HEAD(&hsotg->free_hc_list); |
| num_channels = hsotg->core_params->host_channels; |
| memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array)); |
| |
| for (i = 0; i < num_channels; i++) { |
| channel = kzalloc(sizeof(*channel), GFP_KERNEL); |
| if (channel == NULL) |
| goto error3; |
| channel->hc_num = i; |
| hsotg->hc_ptr_array[i] = channel; |
| } |
| |
| if (hsotg->core_params->uframe_sched > 0) |
| dwc2_hcd_init_usecs(hsotg); |
| |
| /* Initialize hsotg start work */ |
| INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func); |
| |
| /* Initialize port reset work */ |
| INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func); |
| |
| /* |
| * Allocate space for storing data on status transactions. Normally no |
| * data is sent, but this space acts as a bit bucket. This must be |
| * done after usb_add_hcd since that function allocates the DMA buffer |
| * pool. |
| */ |
| if (hsotg->core_params->dma_enable > 0) |
| hsotg->status_buf = dma_alloc_coherent(hsotg->dev, |
| DWC2_HCD_STATUS_BUF_SIZE, |
| &hsotg->status_buf_dma, GFP_KERNEL); |
| else |
| hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE, |
| GFP_KERNEL); |
| |
| if (!hsotg->status_buf) |
| goto error3; |
| |
| hsotg->otg_port = 1; |
| hsotg->frame_list = NULL; |
| hsotg->frame_list_dma = 0; |
| hsotg->periodic_qh_count = 0; |
| |
| /* Initiate lx_state to L3 disconnected state */ |
| hsotg->lx_state = DWC2_L3; |
| |
| hcd->self.otg_port = hsotg->otg_port; |
| |
| /* Don't support SG list at this point */ |
| hcd->self.sg_tablesize = 0; |
| |
| /* |
| * Finish generic HCD initialization and start the HCD. This function |
| * allocates the DMA buffer pool, registers the USB bus, requests the |
| * IRQ line, and calls hcd_start method. |
| */ |
| retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
| if (retval < 0) |
| goto error3; |
| |
| dwc2_hcd_dump_state(hsotg); |
| |
| dwc2_enable_global_interrupts(hsotg); |
| |
| return 0; |
| |
| error3: |
| dwc2_hcd_release(hsotg); |
| error2: |
| usb_put_hcd(hcd); |
| error1: |
| kfree(hsotg->core_params); |
| |
| #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS |
| kfree(hsotg->last_frame_num_array); |
| kfree(hsotg->frame_num_array); |
| #endif |
| |
| dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval); |
| return retval; |
| } |
| EXPORT_SYMBOL_GPL(dwc2_hcd_init); |
| |
| /* |
| * Removes the HCD. |
| * Frees memory and resources associated with the HCD and deregisters the bus. |
| */ |
| void dwc2_hcd_remove(struct dwc2_hsotg *hsotg) |
| { |
| struct usb_hcd *hcd; |
| |
| dev_dbg(hsotg->dev, "DWC OTG HCD REMOVE\n"); |
| |
| hcd = dwc2_hsotg_to_hcd(hsotg); |
| dev_dbg(hsotg->dev, "hsotg->hcd = %p\n", hcd); |
| |
| if (!hcd) { |
| dev_dbg(hsotg->dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n", |
| __func__); |
| return; |
| } |
| |
| usb_remove_hcd(hcd); |
| hsotg->priv = NULL; |
| dwc2_hcd_release(hsotg); |
| usb_put_hcd(hcd); |
| |
| #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS |
| kfree(hsotg->last_frame_num_array); |
| kfree(hsotg->frame_num_array); |
| #endif |
| } |
| EXPORT_SYMBOL_GPL(dwc2_hcd_remove); |