Merge branch 'topic/vmaster-update' into topic/docbook-fix

1 files changed, 284 insertions, 0 deletions

diff --git a/drivers/usb/host/fhci-q.c b/drivers/usb/host/fhci-q.c
new file mode 100644
index 00000000000..b0a1446ba29
--- /dev/null
+++ b/drivers/usb/host/fhci-q.c
@@ -0,0 +1,284 @@
+/*
+ * 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/list.h>
+#include <linux/usb.h>
+#include "../core/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);
+	}
+}