/* * 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); } }