/* $OpenBSD: dwc2_hcd.c,v 1.18 2017/04/11 14:43:49 dhill Exp $ */ /* $NetBSD: dwc2_hcd.c,v 1.15 2014/11/24 10:14:14 skrll Exp $ */ /* * 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 */ #if 0 #include __KERNEL_RCSID(0, "$NetBSD: dwc2_hcd.c,v 1.15 2014/11/24 10:14:14 skrll Exp $"); #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /** * 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 */ #ifdef VERBOSE_DEBUG STATIC void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { 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 = DWC2_READ_4(hsotg, HCCHAR(chan->hc_num)); hcsplt = DWC2_READ_4(hsotg, HCSPLT(chan->hc_num)); hctsiz = DWC2_READ_4(hsotg, HCTSIZ(chan->hc_num)); hc_dma = DWC2_READ_4(hsotg, 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"); TAILQ_FOREACH(qh, &hsotg->non_periodic_sched_inactive, qh_list_entry) dev_dbg(hsotg->dev, " %p\n", qh); dev_dbg(hsotg->dev, " NP active sched:\n"); TAILQ_FOREACH(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 *ch = hsotg->hc_ptr_array[i]; dev_dbg(hsotg->dev, " %2d: %p\n", i, ch); } } #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 dwc2_qh_list *qh_list) { struct dwc2_qh *qh, *qh_tmp; struct dwc2_qtd *qtd, *qtd_tmp; TAILQ_FOREACH_SAFE(qh, qh_list, qh_list_entry, qh_tmp) { TAILQ_FOREACH_SAFE(qtd, &qh->qtd_list, qtd_list_entry, qtd_tmp) { 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 dwc2_qh_list *qh_list) { struct dwc2_qtd *qtd, *qtd_tmp; struct dwc2_qh *qh, *qh_tmp; unsigned long flags; if (TAILQ_EMPTY(qh_list)) { /* 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); TAILQ_FOREACH_SAFE(qh, qh_list, qh_list_entry, qh_tmp) { dwc2_hcd_qh_unlink(hsotg, qh); /* Free each QTD in the QH's QTD list */ TAILQ_FOREACH_SAFE(qtd, &qh->qtd_list, qtd_list_entry, qtd_tmp) { 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; DWC2_WRITE_4(hsotg, HPRT0, 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 (channel->in_freelist == 0) continue; hcchar = DWC2_READ_4(hsotg, HCCHAR(i)); if (hcchar & HCCHAR_CHENA) { hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR); hcchar |= HCCHAR_CHDIS; DWC2_WRITE_4(hsotg, HCCHAR(i), hcchar); } } } for (i = 0; i < num_channels; i++) { channel = hsotg->hc_ptr_array[i]; if (channel->in_freelist != 0) continue; hcchar = DWC2_READ_4(hsotg, HCCHAR(i)); if (hcchar & HCCHAR_CHENA) { /* Halt the channel */ hcchar |= HCCHAR_CHDIS; DWC2_WRITE_4(hsotg, HCCHAR(i), hcchar); } dwc2_hc_cleanup(hsotg, channel); LIST_INSERT_HEAD(&hsotg->free_hc_list, channel, hc_list_entry); channel->in_freelist = 1; /* * 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 = DWC2_READ_4(hsotg, GINTMSK); intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT); DWC2_WRITE_4(hsotg, GINTMSK, intr); intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT; DWC2_WRITE_4(hsotg, GINTSTS, intr); /* * 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"); DWC2_WRITE_4(hsotg, HPRT0, 0); } 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_root_intr(hsotg->hsotg_sc); } /** * 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_root_intr(hsotg->hsotg_sc); } /** * 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"); DWC2_WRITE_4(hsotg, HPRT0, 0); } int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg, struct dwc2_hcd_urb *urb, void **ep_handle, gfp_t mem_flags) { struct dwc2_softc *sc = hsotg->hsotg_sc; struct dwc2_qtd *qtd; 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 core 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 = DWC2_READ_4(hsotg, HPRT0); u32 prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; if (prtspd == HPRT0_SPD_FULL_SPEED) { return -ENODEV; } } qtd = pool_get(&sc->sc_qtdpool, PR_NOWAIT); if (!qtd) return -ENOMEM; memset(qtd, 0, sizeof(*qtd)); 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); pool_put(&sc->sc_qtdpool, qtd); return retval; } intr_mask = DWC2_READ_4(hsotg, 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; tr_type = dwc2_hcd_select_transactions(hsotg); if (tr_type != DWC2_TRANSACTION_NONE) dwc2_hcd_queue_transactions(hsotg, tr_type); } return 0; } /* Must be called with interrupt disabled and spinlock held */ 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) { #ifdef VERBOSE_DEBUG dwc2_dump_channel_info(hsotg, qh->channel); #endif /* 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 (TAILQ_EMPTY(&qh->qtd_list)) { dwc2_hcd_qh_unlink(hsotg, qh); } } else { dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); } return 0; } /* * Initializes dynamic portions of the DWC_otg HCD state * * Must be called with interrupt disabled and spinlock held */ 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 = NULL; 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_FOREACH_SAFE(chan, &hsotg->free_hc_list, hc_list_entry, chan_tmp) { LIST_REMOVE(chan, hc_list_entry); chan->in_freelist = 0; } num_channels = hsotg->core_params->host_channels; for (i = 0; i < num_channels; i++) { chan = hsotg->hc_ptr_array[i]; LIST_INSERT_HEAD(&hsotg->free_hc_list, chan, hc_list_entry); chan->in_freelist = 1; 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_data(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb) { if (hsotg->core_params->dma_enable > 0) { chan->xfer_dma = DMAADDR(urb->usbdma, urb->actual_length); /* For non-dword aligned case */ if (hsotg->core_params->dma_desc_enable <= 0 && (chan->xfer_dma & 0x3)) return (u8 *)urb->buf + urb->actual_length; } else { chan->xfer_buf = (u8 *)urb->buf + urb->actual_length; } return NULL; } STATIC void *dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb) { struct dwc2_hcd_iso_packet_desc *frame_desc; void *bufptr = NULL; 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; break; case DWC2_CONTROL_DATA: dev_vdbg(hsotg->dev, " Control data transaction\n"); chan->data_pid_start = qtd->data_toggle; bufptr = dwc2_hc_init_xfer_data(hsotg, chan, qtd, urb); 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; break; } break; case USB_ENDPOINT_XFER_BULK: chan->ep_type = USB_ENDPOINT_XFER_BULK; bufptr = dwc2_hc_init_xfer_data(hsotg, chan, qtd, urb); break; case USB_ENDPOINT_XFER_INT: chan->ep_type = USB_ENDPOINT_XFER_INT; bufptr = dwc2_hc_init_xfer_data(hsotg, chan, qtd, urb); 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; 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) { int err; qh->dw_align_buf = NULL; qh->dw_align_buf_dma = 0; err = usb_allocmem(&hsotg->hsotg_sc->sc_bus, buf_size, buf_size, &qh->dw_align_buf_usbdma); if (!err) { struct usb_dma *ud = &qh->dw_align_buf_usbdma; qh->dw_align_buf = KERNADDR(ud, 0); qh->dw_align_buf_dma = DMAADDR(ud, 0); } if (!qh->dw_align_buf) return -ENOMEM; } if (!chan->ep_is_in && chan->xfer_len) { usb_syncmem(chan->xfer_usbdma, 0, buf_size, BUS_DMASYNC_POSTWRITE); memcpy(qh->dw_align_buf, bufptr, chan->xfer_len); usb_syncmem(chan->xfer_usbdma, 0, buf_size, BUS_DMASYNC_PREWRITE); } 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 (TAILQ_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(&hsotg->free_hc_list); /* Remove host channel from free list */ LIST_REMOVE(chan, hc_list_entry); chan->in_freelist = 0; qtd = TAILQ_FIRST(&qh->qtd_list); 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; 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, urb); /* Non DWORD-aligned buffer case */ if (bufptr) { dev_vdbg(hsotg->dev, "Non-aligned buffer%p\n", bufptr); 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_INSERT_HEAD(&hsotg->free_hc_list, chan, hc_list_entry); chan->in_freelist = 1; 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 dwc2_qh *qh, *qhn; int num_channels; #ifdef DWC2_DEBUG dev_vdbg(hsotg->dev, " Select Transactions\n"); #endif /* Process entries in the periodic ready list */ /* TAILQ_FOREACH_SAFE? */ qh = TAILQ_FIRST(&hsotg->periodic_sched_ready); while (qh != NULL) { 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--; } if (dwc2_assign_and_init_hc(hsotg, qh)) break; /* * Move the QH from the periodic ready schedule to the * periodic assigned schedule */ qhn = TAILQ_NEXT(qh, qh_list_entry); TAILQ_REMOVE(&hsotg->periodic_sched_ready, qh, qh_list_entry); TAILQ_INSERT_TAIL(&hsotg->periodic_sched_assigned, qh, qh_list_entry); ret_val = DWC2_TRANSACTION_PERIODIC; qh = qhn; } /* * 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 = TAILQ_FIRST(&hsotg->non_periodic_sched_inactive); while (qh != NULL) { 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; /* * Check to see if this is a NAK'd retransmit, in which case * ignore for retransmission. We hold off on bulk/control * retransmissions to reduce NAK interrupt overhead for * cheeky devices that just hold off using NAKs. */ if (qh->nak_frame != 0xffff && dwc2_full_frame_num(qh->nak_frame) == dwc2_full_frame_num(dwc2_hcd_get_frame_number(hsotg))) { qh = TAILQ_NEXT(qh, qh_list_entry); continue; } else { qh->nak_frame = 0xffff; } 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 */ qhn = TAILQ_NEXT(qh, qh_list_entry); TAILQ_REMOVE(&hsotg->non_periodic_sched_inactive, qh, qh_list_entry); TAILQ_INSERT_TAIL(&hsotg->non_periodic_sched_active, qh, qh_list_entry); qh = qhn; 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 dwc2_qh *qh, *qhn; 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 = DWC2_READ_4(hsotg, 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 = TAILQ_FIRST(&hsotg->periodic_sched_assigned); while (qh != NULL) { tx_status = DWC2_READ_4(hsotg, HPTXSTS); qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT; if (qspcavail == 0) { no_queue_space = 1; break; } if (!qh->channel) { qh = TAILQ_NEXT(qh, qh_list_entry); continue; } /* Make sure EP's TT buffer is clean before queueing qtds */ if (qh->tt_buffer_dirty) { qh = TAILQ_NEXT(qh, qh_list_entry); 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) { qhn = TAILQ_NEXT(qh, qh_list_entry); /* * Move the QH from the periodic assigned schedule to * the periodic queued schedule */ TAILQ_REMOVE(&hsotg->periodic_sched_assigned, qh, qh_list_entry); TAILQ_INSERT_TAIL(&hsotg->periodic_sched_queued, qh, qh_list_entry); /* done queuing high bandwidth */ hsotg->queuing_high_bandwidth = 0; qh = qhn; } } if (hsotg->core_params->dma_enable <= 0) { tx_status = DWC2_READ_4(hsotg, 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 (!TAILQ_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 = DWC2_READ_4(hsotg, GINTMSK); gintmsk |= GINTSTS_PTXFEMP; DWC2_WRITE_4(hsotg, GINTMSK, 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 = DWC2_READ_4(hsotg, GINTMSK); gintmsk &= ~GINTSTS_PTXFEMP; DWC2_WRITE_4(hsotg, GINTMSK, 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 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 = DWC2_READ_4(hsotg, 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 == NULL) { hsotg->non_periodic_qh_ptr = TAILQ_FIRST(&hsotg->non_periodic_sched_active); } qh = 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 = DWC2_READ_4(hsotg, GNPTXSTS); qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT; if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) { no_queue_space = 1; break; } 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, wrapping to the start if we hit the end */ qh = TAILQ_NEXT(qh, qh_list_entry); if (qh == NULL) qh = TAILQ_FIRST(&hsotg->non_periodic_sched_active); } while ((qh != hsotg->non_periodic_qh_ptr) && (hsotg->non_periodic_qh_ptr != NULL)); hsotg->non_periodic_qh_ptr = qh; if (hsotg->core_params->dma_enable <= 0) { tx_status = DWC2_READ_4(hsotg, 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 = DWC2_READ_4(hsotg, GINTMSK); gintmsk |= GINTSTS_NPTXFEMP; DWC2_WRITE_4(hsotg, GINTMSK, 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 = DWC2_READ_4(hsotg, GINTMSK); gintmsk &= ~GINTSTS_NPTXFEMP; DWC2_WRITE_4(hsotg, GINTMSK, 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 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) && !TAILQ_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 (!TAILQ_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 = DWC2_READ_4(hsotg, GINTMSK); gintmsk &= ~GINTSTS_NPTXFEMP; DWC2_WRITE_4(hsotg, GINTMSK, gintmsk); } } } void dwc2_conn_id_status_change(void *data) { struct dwc2_hsotg *hsotg = data; u32 count = 0; u32 gotgctl; dev_dbg(hsotg->dev, "%s()\n", __func__); gotgctl = DWC2_READ_4(hsotg, 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); 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); dwc2_enable_global_interrupts(hsotg); dwc2_hcd_start(hsotg); } } void dwc2_wakeup_detected(void * 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; DWC2_WRITE_4(hsotg, HPRT0, hprt0); dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n", DWC2_READ_4(hsotg, HPRT0)); dwc2_hcd_rem_wakeup(hsotg); /* Change to L0 state */ hsotg->lx_state = DWC2_L0; } /* 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 = DWC2_READ_4(hsotg, GOTGCTL); gotgctl |= GOTGCTL_HSTSETHNPEN; DWC2_WRITE_4(hsotg, GOTGCTL, gotgctl); hsotg->op_state = OTG_STATE_A_SUSPEND; } hprt0 = dwc2_read_hprt0(hsotg); hprt0 |= HPRT0_SUSP; DWC2_WRITE_4(hsotg, HPRT0, hprt0); /* Update lx_state */ hsotg->lx_state = DWC2_L2; /* Suspend the Phy Clock */ pcgctl = DWC2_READ_4(hsotg, PCGCTL); pcgctl |= PCGCTL_STOPPCLK; DWC2_WRITE_4(hsotg, PCGCTL, pcgctl); udelay(10); /* For HNP the bus must be suspended for at least 200ms */ if (dwc2_host_is_b_hnp_enabled(hsotg)) { pcgctl = DWC2_READ_4(hsotg, PCGCTL); pcgctl &= ~PCGCTL_STOPPCLK; DWC2_WRITE_4(hsotg, PCGCTL, pcgctl); spin_unlock_irqrestore(&hsotg->lock, flags); usleep_range(200000, 250000); } else { spin_unlock_irqrestore(&hsotg->lock, flags); } } /* Handles hub class-specific requests */ int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq, u16 wvalue, u16 windex, char *buf, u16 wlength) { usb_hub_descriptor_t *hub_desc; usb_port_status_t ps; 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; DWC2_WRITE_4(hsotg, HPRT0, hprt0); break; case USB_PORT_FEAT_SUSPEND: dev_dbg(hsotg->dev, "ClearPortFeature USB_PORT_FEAT_SUSPEND\n"); DWC2_WRITE_4(hsotg, PCGCTL, 0); usleep_range(20000, 40000); hprt0 = dwc2_read_hprt0(hsotg); hprt0 |= HPRT0_RES; DWC2_WRITE_4(hsotg, HPRT0, hprt0); hprt0 &= ~HPRT0_SUSP; usleep_range(100000, 150000); hprt0 &= ~HPRT0_RES; DWC2_WRITE_4(hsotg, HPRT0, 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; DWC2_WRITE_4(hsotg, HPRT0, 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 = (usb_hub_descriptor_t *)buf; hub_desc->bDescLength = 9; hub_desc->bDescriptorType = 0x29; hub_desc->bNbrPorts = 1; USETW(hub_desc->wHubCharacteristics, 0x08); hub_desc->bPwrOn2PwrGood = 1; hub_desc->bHubContrCurrent = 0; hub_desc->DeviceRemovable[0] = 0; hub_desc->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; if (hsotg->flags.b.port_enable_change) port_status |= USB_PORT_STAT_C_ENABLE; if (hsotg->flags.b.port_suspend_change) port_status |= USB_PORT_STAT_C_SUSPEND; if (hsotg->flags.b.port_l1_change) port_status |= USB_PORT_STAT_C_L1; if (hsotg->flags.b.port_reset_change) port_status |= USB_PORT_STAT_C_RESET; if (hsotg->flags.b.port_over_current_change) { dev_warn(hsotg->dev, "Overcurrent change detected\n"); port_status |= USB_PORT_STAT_C_OVERCURRENT; } USETW(ps.wPortChange, port_status); dev_vdbg(hsotg->dev, "wPortChange=%04x\n", port_status); 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. */ USETW(ps.wPortStatus, 0); memcpy(buf, &ps, sizeof(ps)); break; } port_status = 0; hprt0 = DWC2_READ_4(hsotg, 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 */ USETW(ps.wPortStatus, port_status); dev_vdbg(hsotg->dev, "wPortStatus=%04x\n", port_status); memcpy(buf, &ps, sizeof(ps)); 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; DWC2_WRITE_4(hsotg, HPRT0, hprt0); break; case USB_PORT_FEAT_RESET: hprt0 = dwc2_read_hprt0(hsotg); dev_dbg(hsotg->dev, "SetPortFeature - USB_PORT_FEAT_RESET\n"); pcgctl = DWC2_READ_4(hsotg, PCGCTL); pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK); DWC2_WRITE_4(hsotg, PCGCTL, pcgctl); /* ??? Original driver does this */ DWC2_WRITE_4(hsotg, PCGCTL, 0); 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); DWC2_WRITE_4(hsotg, HPRT0, hprt0); } /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */ usleep_range(50000, 70000); hprt0 &= ~HPRT0_RST; DWC2_WRITE_4(hsotg, HPRT0, 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; } int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) { u32 hfnum = DWC2_READ_4(hsotg, HFNUM); #ifdef DWC2_DEBUG 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; } 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 = malloc(size, M_DEVBUF, M_ZERO | mem_flags); if (urb) urb->packet_count = iso_desc_count; return urb; } void dwc2_hcd_urb_free(struct dwc2_hsotg *hsotg, struct dwc2_hcd_urb *urb, int iso_desc_count) { u32 size = sizeof(*urb) + iso_desc_count * sizeof(struct dwc2_hcd_iso_packet_desc); free(urb, M_DEVBUF, size); } 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_dbg(hsotg->dev, "urb=%p, xfer=%p\n", urb, urb->priv); 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 DWC2_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) { dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", DWC2_READ_4(hsotg, HFNUM)); dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", DWC2_READ_4(hsotg, HCCHAR(i))); dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", DWC2_READ_4(hsotg, HCTSIZ(i))); dev_dbg(hsotg->dev, " hcint: 0x%08x\n", DWC2_READ_4(hsotg, HCINT(i))); dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", DWC2_READ_4(hsotg, HCINTMSK(i))); } if (!(chan->xfer_started && chan->qh)) continue; TAILQ_FOREACH(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 = DWC2_READ_4(hsotg, 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 = DWC2_READ_4(hsotg, 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; }; 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(hsotg); } void dwc2_host_disconnect(struct dwc2_hsotg *hsotg) { // struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); // hcd->self.is_b_host = 0; } /* * Work queue function for starting the HCD when A-Cable is connected */ void dwc2_hcd_start_func(void *data) { struct dwc2_hsotg *hsotg = data; dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg); dwc2_host_start(hsotg); } /* * Reset work queue function */ void dwc2_hcd_reset_func(void *data) { struct dwc2_hsotg *hsotg = data; u32 hprt0; dev_dbg(hsotg->dev, "USB RESET function called\n"); hprt0 = dwc2_read_hprt0(hsotg); hprt0 &= ~HPRT0_RST; DWC2_WRITE_4(hsotg, HPRT0, hprt0); hsotg->flags.b.port_reset_change = 1; dwc2_root_intr(hsotg->hsotg_sc); } /* * ========================================================================= * 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. */ /* * 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; free(chan, M_DEVBUF, sizeof(*chan)); } } if (hsotg->core_params->dma_enable > 0) { if (hsotg->status_buf) { usb_freemem(&hsotg->hsotg_sc->sc_bus, &hsotg->status_buf_usbdma); hsotg->status_buf = NULL; } } else { free(hsotg->status_buf, M_DEVBUF, DWC2_HCD_STATUS_BUF_SIZE); hsotg->status_buf = NULL; } ahbcfg = DWC2_READ_4(hsotg, GAHBCFG); /* Disable all interrupts */ ahbcfg &= ~GAHBCFG_GLBL_INTR_EN; DWC2_WRITE_4(hsotg, GAHBCFG, ahbcfg); DWC2_WRITE_4(hsotg, GINTMSK, 0); if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a) { dctl = DWC2_READ_4(hsotg, DCTL); dctl |= DCTL_SFTDISCON; DWC2_WRITE_4(hsotg, DCTL, dctl); } if (hsotg->wq_otg) { taskq_destroy(hsotg->wq_otg); } free(hsotg->core_params, M_DEVBUF, sizeof(*hsotg->core_params)); hsotg->core_params = NULL; timeout_del(&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; } /* * 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, const struct dwc2_core_params *params) { struct dwc2_host_chan *channel; 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; dev_dbg(hsotg->dev, "hcfg=%08x\n", DWC2_READ_4(hsotg, HCFG)); #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS hsotg->frame_num_array = malloc(sizeof(*hsotg->frame_num_array) * FRAME_NUM_ARRAY_SIZE, M_DEVBUF, M_ZERO | M_WAITOK); if (!hsotg->frame_num_array) goto error1; hsotg->last_frame_num_array = malloc( sizeof(*hsotg->last_frame_num_array) * FRAME_NUM_ARRAY_SIZE, M_DEVBUF, M_ZERO | M_WAITOK); if (!hsotg->last_frame_num_array) goto error1; hsotg->last_frame_num = HFNUM_MAX_FRNUM; #endif hsotg->core_params = malloc(sizeof(*hsotg->core_params), M_DEVBUF, M_ZERO | M_WAITOK); if (!hsotg->core_params) goto error1; dwc2_set_all_params(hsotg->core_params, -1); /* Validate parameter values */ dwc2_set_parameters(hsotg, params); spin_lock_init(&hsotg->lock); /* * 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); if (retval) goto error2; /* Create new workqueue and init work */ retval = -ENOMEM; hsotg->wq_otg = taskq_create("dwc2", 1, IPL_USB, 0); if (hsotg->wq_otg == NULL) { dev_err(hsotg->dev, "Failed to create workqueue\n"); goto error2; } timeout_set(&hsotg->wkp_timer, dwc2_wakeup_detected, hsotg); /* Initialize the non-periodic schedule */ TAILQ_INIT(&hsotg->non_periodic_sched_inactive); TAILQ_INIT(&hsotg->non_periodic_sched_active); /* Initialize the periodic schedule */ TAILQ_INIT(&hsotg->periodic_sched_inactive); TAILQ_INIT(&hsotg->periodic_sched_ready); TAILQ_INIT(&hsotg->periodic_sched_assigned); TAILQ_INIT(&hsotg->periodic_sched_queued); /* * Create a host channel descriptor for each host channel implemented * in the controller. Initialize the channel descriptor array. */ LIST_INIT(&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 = malloc(sizeof(*channel), M_DEVBUF, M_ZERO | M_WAITOK); 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, hsotg); /* Initialize port reset work */ INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func, hsotg); /* * 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. */ hsotg->status_buf = NULL; if (hsotg->core_params->dma_enable > 0) { retval = usb_allocmem(&hsotg->hsotg_sc->sc_bus, DWC2_HCD_STATUS_BUF_SIZE, 0, &hsotg->status_buf_usbdma); if (!retval) { hsotg->status_buf = KERNADDR(&hsotg->status_buf_usbdma, 0); hsotg->status_buf_dma = DMAADDR(&hsotg->status_buf_usbdma, 0); } } else hsotg->status_buf = malloc(DWC2_HCD_STATUS_BUF_SIZE, M_DEVBUF, M_ZERO | M_WAITOK); 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; _dwc2_hcd_start(hsotg); dwc2_hcd_dump_state(hsotg); dwc2_enable_global_interrupts(hsotg); return 0; error3: dwc2_hcd_release(hsotg); error2: error1: free(hsotg->core_params, M_DEVBUF, sizeof(*hsotg->core_params)); #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS free(hsotg->last_frame_num_array, M_DEVBUF, sizeof(*hsotg->last_frame_num_array) * FRAME_NUM_ARRAY_SIZE); free(hsotg->frame_num_array, M_DEVBUF, sizeof(*hsotg->frame_num_array) * FRAME_NUM_ARRAY_SIZE); #endif dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval); return retval; } int dwc2_hcd_dma_config(struct dwc2_hsotg *hsotg, struct dwc2_core_dma_config *config) { hsotg->core_dma_config = config; return 0; }