| /* |
| * Freescale QUICC Engine USB Host Controller Driver |
| * |
| * Copyright (c) Freescale Semicondutor, Inc. 2006. |
| * Shlomi Gridish <gridish@freescale.com> |
| * Jerry Huang <Chang-Ming.Huang@freescale.com> |
| * Copyright (c) Logic Product Development, Inc. 2007 |
| * Peter Barada <peterb@logicpd.com> |
| * Copyright (c) MontaVista Software, Inc. 2008. |
| * Anton Vorontsov <avorontsov@ru.mvista.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/spinlock.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/list.h> |
| #include <linux/usb.h> |
| #include <linux/usb/hcd.h> |
| #include "fhci.h" |
| |
| /* maps the hardware error code to the USB error code */ |
| static int status_to_error(u32 status) |
| { |
| if (status == USB_TD_OK) |
| return 0; |
| else if (status & USB_TD_RX_ER_CRC) |
| return -EILSEQ; |
| else if (status & USB_TD_RX_ER_NONOCT) |
| return -EPROTO; |
| else if (status & USB_TD_RX_ER_OVERUN) |
| return -ECOMM; |
| else if (status & USB_TD_RX_ER_BITSTUFF) |
| return -EPROTO; |
| else if (status & USB_TD_RX_ER_PID) |
| return -EILSEQ; |
| else if (status & (USB_TD_TX_ER_NAK | USB_TD_TX_ER_TIMEOUT)) |
| return -ETIMEDOUT; |
| else if (status & USB_TD_TX_ER_STALL) |
| return -EPIPE; |
| else if (status & USB_TD_TX_ER_UNDERUN) |
| return -ENOSR; |
| else if (status & USB_TD_RX_DATA_UNDERUN) |
| return -EREMOTEIO; |
| else if (status & USB_TD_RX_DATA_OVERUN) |
| return -EOVERFLOW; |
| else |
| return -EINVAL; |
| } |
| |
| void fhci_add_td_to_frame(struct fhci_time_frame *frame, struct td *td) |
| { |
| list_add_tail(&td->frame_lh, &frame->tds_list); |
| } |
| |
| void fhci_add_tds_to_ed(struct ed *ed, struct td **td_list, int number) |
| { |
| int i; |
| |
| for (i = 0; i < number; i++) { |
| struct td *td = td_list[i]; |
| list_add_tail(&td->node, &ed->td_list); |
| } |
| if (ed->td_head == NULL) |
| ed->td_head = td_list[0]; |
| } |
| |
| static struct td *peek_td_from_ed(struct ed *ed) |
| { |
| struct td *td; |
| |
| if (!list_empty(&ed->td_list)) |
| td = list_entry(ed->td_list.next, struct td, node); |
| else |
| td = NULL; |
| |
| return td; |
| } |
| |
| struct td *fhci_remove_td_from_frame(struct fhci_time_frame *frame) |
| { |
| struct td *td; |
| |
| if (!list_empty(&frame->tds_list)) { |
| td = list_entry(frame->tds_list.next, struct td, frame_lh); |
| list_del_init(frame->tds_list.next); |
| } else |
| td = NULL; |
| |
| return td; |
| } |
| |
| struct td *fhci_peek_td_from_frame(struct fhci_time_frame *frame) |
| { |
| struct td *td; |
| |
| if (!list_empty(&frame->tds_list)) |
| td = list_entry(frame->tds_list.next, struct td, frame_lh); |
| else |
| td = NULL; |
| |
| return td; |
| } |
| |
| struct td *fhci_remove_td_from_ed(struct ed *ed) |
| { |
| struct td *td; |
| |
| if (!list_empty(&ed->td_list)) { |
| td = list_entry(ed->td_list.next, struct td, node); |
| list_del_init(ed->td_list.next); |
| |
| /* if this TD was the ED's head, find next TD */ |
| if (!list_empty(&ed->td_list)) |
| ed->td_head = list_entry(ed->td_list.next, struct td, |
| node); |
| else |
| ed->td_head = NULL; |
| } else |
| td = NULL; |
| |
| return td; |
| } |
| |
| struct td *fhci_remove_td_from_done_list(struct fhci_controller_list *p_list) |
| { |
| struct td *td; |
| |
| if (!list_empty(&p_list->done_list)) { |
| td = list_entry(p_list->done_list.next, struct td, node); |
| list_del_init(p_list->done_list.next); |
| } else |
| td = NULL; |
| |
| return td; |
| } |
| |
| void fhci_move_td_from_ed_to_done_list(struct fhci_usb *usb, struct ed *ed) |
| { |
| struct td *td; |
| |
| td = ed->td_head; |
| list_del_init(&td->node); |
| |
| /* If this TD was the ED's head,find next TD */ |
| if (!list_empty(&ed->td_list)) |
| ed->td_head = list_entry(ed->td_list.next, struct td, node); |
| else { |
| ed->td_head = NULL; |
| ed->state = FHCI_ED_SKIP; |
| } |
| ed->toggle_carry = td->toggle; |
| list_add_tail(&td->node, &usb->hc_list->done_list); |
| if (td->ioc) |
| usb->transfer_confirm(usb->fhci); |
| } |
| |
| /* free done FHCI URB resource such as ED and TD */ |
| static void free_urb_priv(struct fhci_hcd *fhci, struct urb *urb) |
| { |
| int i; |
| struct urb_priv *urb_priv = urb->hcpriv; |
| struct ed *ed = urb_priv->ed; |
| |
| for (i = 0; i < urb_priv->num_of_tds; i++) { |
| list_del_init(&urb_priv->tds[i]->node); |
| fhci_recycle_empty_td(fhci, urb_priv->tds[i]); |
| } |
| |
| /* if this TD was the ED's head,find the next TD */ |
| if (!list_empty(&ed->td_list)) |
| ed->td_head = list_entry(ed->td_list.next, struct td, node); |
| else |
| ed->td_head = NULL; |
| |
| kfree(urb_priv->tds); |
| kfree(urb_priv); |
| urb->hcpriv = NULL; |
| |
| /* if this TD was the ED's head,find next TD */ |
| if (ed->td_head == NULL) |
| list_del_init(&ed->node); |
| fhci->active_urbs--; |
| } |
| |
| /* this routine called to complete and free done URB */ |
| void fhci_urb_complete_free(struct fhci_hcd *fhci, struct urb *urb) |
| { |
| free_urb_priv(fhci, urb); |
| |
| if (urb->status == -EINPROGRESS) { |
| if (urb->actual_length != urb->transfer_buffer_length && |
| urb->transfer_flags & URB_SHORT_NOT_OK) |
| urb->status = -EREMOTEIO; |
| else |
| urb->status = 0; |
| } |
| |
| usb_hcd_unlink_urb_from_ep(fhci_to_hcd(fhci), urb); |
| |
| spin_unlock(&fhci->lock); |
| |
| usb_hcd_giveback_urb(fhci_to_hcd(fhci), urb, urb->status); |
| |
| spin_lock(&fhci->lock); |
| } |
| |
| /* |
| * caculate transfer length/stats and update the urb |
| * Precondition: irqsafe(only for urb-?status locking) |
| */ |
| void fhci_done_td(struct urb *urb, struct td *td) |
| { |
| struct ed *ed = td->ed; |
| u32 cc = td->status; |
| |
| /* ISO...drivers see per-TD length/status */ |
| if (ed->mode == FHCI_TF_ISO) { |
| u32 len; |
| if (!(urb->transfer_flags & URB_SHORT_NOT_OK && |
| cc == USB_TD_RX_DATA_UNDERUN)) |
| cc = USB_TD_OK; |
| |
| if (usb_pipeout(urb->pipe)) |
| len = urb->iso_frame_desc[td->iso_index].length; |
| else |
| len = td->actual_len; |
| |
| urb->actual_length += len; |
| urb->iso_frame_desc[td->iso_index].actual_length = len; |
| urb->iso_frame_desc[td->iso_index].status = |
| status_to_error(cc); |
| } |
| |
| /* BULK,INT,CONTROL... drivers see aggregate length/status, |
| * except that "setup" bytes aren't counted and "short" transfers |
| * might not be reported as errors. |
| */ |
| else { |
| if (td->error_cnt >= 3) |
| urb->error_count = 3; |
| |
| /* control endpoint only have soft stalls */ |
| |
| /* update packet status if needed(short may be ok) */ |
| if (!(urb->transfer_flags & URB_SHORT_NOT_OK) && |
| cc == USB_TD_RX_DATA_UNDERUN) { |
| ed->state = FHCI_ED_OPER; |
| cc = USB_TD_OK; |
| } |
| if (cc != USB_TD_OK) { |
| if (urb->status == -EINPROGRESS) |
| urb->status = status_to_error(cc); |
| } |
| |
| /* count all non-empty packets except control SETUP packet */ |
| if (td->type != FHCI_TA_SETUP || td->iso_index != 0) |
| urb->actual_length += td->actual_len; |
| } |
| } |
| |
| /* there are some pedning request to unlink */ |
| void fhci_del_ed_list(struct fhci_hcd *fhci, struct ed *ed) |
| { |
| struct td *td = peek_td_from_ed(ed); |
| struct urb *urb = td->urb; |
| struct urb_priv *urb_priv = urb->hcpriv; |
| |
| if (urb_priv->state == URB_DEL) { |
| td = fhci_remove_td_from_ed(ed); |
| /* HC may have partly processed this TD */ |
| if (td->status != USB_TD_INPROGRESS) |
| fhci_done_td(urb, td); |
| |
| /* URB is done;clean up */ |
| if (++(urb_priv->tds_cnt) == urb_priv->num_of_tds) |
| fhci_urb_complete_free(fhci, urb); |
| } |
| } |