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281 lines
6.7 KiB
281 lines
6.7 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Freescale QUICC Engine USB Host Controller Driver |
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* |
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* Copyright (c) Freescale Semicondutor, Inc. 2006. |
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* Shlomi Gridish <[email protected]> |
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* Jerry Huang <[email protected]> |
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* Copyright (c) Logic Product Development, Inc. 2007 |
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* Peter Barada <[email protected]> |
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* Copyright (c) MontaVista Software, Inc. 2008. |
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* Anton Vorontsov <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/spinlock.h> |
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#include <linux/errno.h> |
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#include <linux/slab.h> |
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#include <linux/list.h> |
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#include <linux/usb.h> |
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#include <linux/usb/hcd.h> |
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#include "fhci.h" |
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/* maps the hardware error code to the USB error code */ |
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static int status_to_error(u32 status) |
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{ |
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if (status == USB_TD_OK) |
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return 0; |
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else if (status & USB_TD_RX_ER_CRC) |
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return -EILSEQ; |
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else if (status & USB_TD_RX_ER_NONOCT) |
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return -EPROTO; |
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else if (status & USB_TD_RX_ER_OVERUN) |
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return -ECOMM; |
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else if (status & USB_TD_RX_ER_BITSTUFF) |
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return -EPROTO; |
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else if (status & USB_TD_RX_ER_PID) |
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return -EILSEQ; |
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else if (status & (USB_TD_TX_ER_NAK | USB_TD_TX_ER_TIMEOUT)) |
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return -ETIMEDOUT; |
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else if (status & USB_TD_TX_ER_STALL) |
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return -EPIPE; |
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else if (status & USB_TD_TX_ER_UNDERUN) |
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return -ENOSR; |
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else if (status & USB_TD_RX_DATA_UNDERUN) |
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return -EREMOTEIO; |
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else if (status & USB_TD_RX_DATA_OVERUN) |
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return -EOVERFLOW; |
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else |
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return -EINVAL; |
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} |
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void fhci_add_td_to_frame(struct fhci_time_frame *frame, struct td *td) |
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{ |
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list_add_tail(&td->frame_lh, &frame->tds_list); |
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} |
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void fhci_add_tds_to_ed(struct ed *ed, struct td **td_list, int number) |
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{ |
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int i; |
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for (i = 0; i < number; i++) { |
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struct td *td = td_list[i]; |
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list_add_tail(&td->node, &ed->td_list); |
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} |
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if (ed->td_head == NULL) |
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ed->td_head = td_list[0]; |
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} |
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static struct td *peek_td_from_ed(struct ed *ed) |
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{ |
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struct td *td; |
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if (!list_empty(&ed->td_list)) |
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td = list_entry(ed->td_list.next, struct td, node); |
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else |
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td = NULL; |
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return td; |
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} |
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struct td *fhci_remove_td_from_frame(struct fhci_time_frame *frame) |
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{ |
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struct td *td; |
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if (!list_empty(&frame->tds_list)) { |
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td = list_entry(frame->tds_list.next, struct td, frame_lh); |
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list_del_init(frame->tds_list.next); |
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} else |
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td = NULL; |
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return td; |
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} |
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struct td *fhci_peek_td_from_frame(struct fhci_time_frame *frame) |
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{ |
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struct td *td; |
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if (!list_empty(&frame->tds_list)) |
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td = list_entry(frame->tds_list.next, struct td, frame_lh); |
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else |
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td = NULL; |
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return td; |
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} |
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struct td *fhci_remove_td_from_ed(struct ed *ed) |
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{ |
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struct td *td; |
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if (!list_empty(&ed->td_list)) { |
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td = list_entry(ed->td_list.next, struct td, node); |
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list_del_init(ed->td_list.next); |
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/* if this TD was the ED's head, find next TD */ |
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if (!list_empty(&ed->td_list)) |
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ed->td_head = list_entry(ed->td_list.next, struct td, |
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node); |
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else |
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ed->td_head = NULL; |
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} else |
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td = NULL; |
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return td; |
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} |
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struct td *fhci_remove_td_from_done_list(struct fhci_controller_list *p_list) |
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{ |
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struct td *td; |
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if (!list_empty(&p_list->done_list)) { |
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td = list_entry(p_list->done_list.next, struct td, node); |
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list_del_init(p_list->done_list.next); |
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} else |
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td = NULL; |
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return td; |
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} |
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void fhci_move_td_from_ed_to_done_list(struct fhci_usb *usb, struct ed *ed) |
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{ |
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struct td *td; |
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td = ed->td_head; |
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list_del_init(&td->node); |
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/* If this TD was the ED's head,find next TD */ |
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if (!list_empty(&ed->td_list)) |
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ed->td_head = list_entry(ed->td_list.next, struct td, node); |
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else { |
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ed->td_head = NULL; |
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ed->state = FHCI_ED_SKIP; |
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} |
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ed->toggle_carry = td->toggle; |
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list_add_tail(&td->node, &usb->hc_list->done_list); |
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if (td->ioc) |
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usb->transfer_confirm(usb->fhci); |
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} |
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/* free done FHCI URB resource such as ED and TD */ |
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static void free_urb_priv(struct fhci_hcd *fhci, struct urb *urb) |
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{ |
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int i; |
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struct urb_priv *urb_priv = urb->hcpriv; |
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struct ed *ed = urb_priv->ed; |
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for (i = 0; i < urb_priv->num_of_tds; i++) { |
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list_del_init(&urb_priv->tds[i]->node); |
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fhci_recycle_empty_td(fhci, urb_priv->tds[i]); |
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} |
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/* if this TD was the ED's head,find the next TD */ |
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if (!list_empty(&ed->td_list)) |
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ed->td_head = list_entry(ed->td_list.next, struct td, node); |
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else |
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ed->td_head = NULL; |
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kfree(urb_priv->tds); |
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kfree(urb_priv); |
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urb->hcpriv = NULL; |
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/* if this TD was the ED's head,find next TD */ |
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if (ed->td_head == NULL) |
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list_del_init(&ed->node); |
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fhci->active_urbs--; |
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} |
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/* this routine called to complete and free done URB */ |
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void fhci_urb_complete_free(struct fhci_hcd *fhci, struct urb *urb) |
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{ |
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free_urb_priv(fhci, urb); |
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if (urb->status == -EINPROGRESS) { |
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if (urb->actual_length != urb->transfer_buffer_length && |
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urb->transfer_flags & URB_SHORT_NOT_OK) |
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urb->status = -EREMOTEIO; |
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else |
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urb->status = 0; |
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} |
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usb_hcd_unlink_urb_from_ep(fhci_to_hcd(fhci), urb); |
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spin_unlock(&fhci->lock); |
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usb_hcd_giveback_urb(fhci_to_hcd(fhci), urb, urb->status); |
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spin_lock(&fhci->lock); |
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} |
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/* |
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* caculate transfer length/stats and update the urb |
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* Precondition: irqsafe(only for urb-?status locking) |
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*/ |
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void fhci_done_td(struct urb *urb, struct td *td) |
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{ |
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struct ed *ed = td->ed; |
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u32 cc = td->status; |
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/* ISO...drivers see per-TD length/status */ |
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if (ed->mode == FHCI_TF_ISO) { |
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u32 len; |
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if (!(urb->transfer_flags & URB_SHORT_NOT_OK && |
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cc == USB_TD_RX_DATA_UNDERUN)) |
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cc = USB_TD_OK; |
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if (usb_pipeout(urb->pipe)) |
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len = urb->iso_frame_desc[td->iso_index].length; |
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else |
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len = td->actual_len; |
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urb->actual_length += len; |
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urb->iso_frame_desc[td->iso_index].actual_length = len; |
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urb->iso_frame_desc[td->iso_index].status = |
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status_to_error(cc); |
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} |
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/* BULK,INT,CONTROL... drivers see aggregate length/status, |
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* except that "setup" bytes aren't counted and "short" transfers |
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* might not be reported as errors. |
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*/ |
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else { |
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if (td->error_cnt >= 3) |
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urb->error_count = 3; |
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/* control endpoint only have soft stalls */ |
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/* update packet status if needed(short may be ok) */ |
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if (!(urb->transfer_flags & URB_SHORT_NOT_OK) && |
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cc == USB_TD_RX_DATA_UNDERUN) { |
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ed->state = FHCI_ED_OPER; |
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cc = USB_TD_OK; |
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} |
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if (cc != USB_TD_OK) { |
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if (urb->status == -EINPROGRESS) |
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urb->status = status_to_error(cc); |
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} |
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/* count all non-empty packets except control SETUP packet */ |
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if (td->type != FHCI_TA_SETUP || td->iso_index != 0) |
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urb->actual_length += td->actual_len; |
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} |
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} |
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/* there are some pedning request to unlink */ |
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void fhci_del_ed_list(struct fhci_hcd *fhci, struct ed *ed) |
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{ |
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struct td *td = peek_td_from_ed(ed); |
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struct urb *urb = td->urb; |
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struct urb_priv *urb_priv = urb->hcpriv; |
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if (urb_priv->state == URB_DEL) { |
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td = fhci_remove_td_from_ed(ed); |
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/* HC may have partly processed this TD */ |
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if (td->status != USB_TD_INPROGRESS) |
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fhci_done_td(urb, td); |
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/* URB is done;clean up */ |
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if (++(urb_priv->tds_cnt) == urb_priv->num_of_tds) |
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fhci_urb_complete_free(fhci, urb); |
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} |
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}
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