diff options
Diffstat (limited to 'drivers/staging/dwc2/hcd.c')
| -rw-r--r-- | drivers/staging/dwc2/hcd.c | 2948 |
1 files changed, 0 insertions, 2948 deletions
diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c deleted file mode 100644 index da0d35cc33c..00000000000 --- a/drivers/staging/dwc2/hcd.c +++ /dev/null @@ -1,2948 +0,0 @@ -/* - * 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; - - if (!hsotg->flags.b.port_connect_status) { - /* No longer connected */ - dev_err(hsotg->dev, "Not connected\n"); - 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 < 0) { - 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) && retval == 0) { - 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 retval; -} - -/* 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; - 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 void 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; - } - - if (list_empty(&hsotg->free_hc_list)) { - dev_dbg(hsotg->dev, "No free channel to assign\n"); - return; - } - - chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan, - hc_list_entry); - - /* Remove the host channel from the 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 (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; - } - } 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; -} - -/** - * 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; - qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); - dwc2_assign_and_init_hc(hsotg, qh); - - /* - * 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->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); - dwc2_assign_and_init_hc(hsotg, qh); - - /* - * 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; - - 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; - } - - /* 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); |