![Wei Yongjun](/assets/img/avatar_default.png)
Using list_move_tail() instead of list_del() + list_add_tail(). spatch with a semantic match is used to found this problem. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
895 lines
24 KiB
C
895 lines
24 KiB
C
/*
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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, 2011.
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* Shlomi Gridish <gridish@freescale.com>
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* Jerry Huang <Chang-Ming.Huang@freescale.com>
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* Copyright (c) Logic Product Development, Inc. 2007
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* Peter Barada <peterb@logicpd.com>
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* Copyright (c) MontaVista Software, Inc. 2008.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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/delay.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <asm/qe.h>
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#include <asm/fsl_gtm.h>
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#include "fhci.h"
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static void recycle_frame(struct fhci_usb *usb, struct packet *pkt)
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{
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pkt->data = NULL;
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pkt->len = 0;
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pkt->status = USB_TD_OK;
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pkt->info = 0;
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pkt->priv_data = NULL;
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cq_put(&usb->ep0->empty_frame_Q, pkt);
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}
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/* confirm submitted packet */
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void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt)
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{
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struct td *td;
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struct packet *td_pkt;
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struct ed *ed;
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u32 trans_len;
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bool td_done = false;
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td = fhci_remove_td_from_frame(usb->actual_frame);
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td_pkt = td->pkt;
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trans_len = pkt->len;
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td->status = pkt->status;
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if (td->type == FHCI_TA_IN && td_pkt->info & PKT_DUMMY_PACKET) {
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if ((td->data + td->actual_len) && trans_len)
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memcpy(td->data + td->actual_len, pkt->data,
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trans_len);
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cq_put(&usb->ep0->dummy_packets_Q, pkt->data);
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}
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recycle_frame(usb, pkt);
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ed = td->ed;
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if (ed->mode == FHCI_TF_ISO) {
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if (ed->td_list.next->next != &ed->td_list) {
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struct td *td_next =
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list_entry(ed->td_list.next->next, struct td,
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node);
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td_next->start_frame = usb->actual_frame->frame_num;
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}
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td->actual_len = trans_len;
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td_done = true;
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} else if ((td->status & USB_TD_ERROR) &&
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!(td->status & USB_TD_TX_ER_NAK)) {
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/*
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* There was an error on the transaction (but not NAK).
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* If it is fatal error (data underrun, stall, bad pid or 3
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* errors exceeded), mark this TD as done.
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*/
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if ((td->status & USB_TD_RX_DATA_UNDERUN) ||
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(td->status & USB_TD_TX_ER_STALL) ||
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(td->status & USB_TD_RX_ER_PID) ||
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(++td->error_cnt >= 3)) {
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ed->state = FHCI_ED_HALTED;
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td_done = true;
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if (td->status & USB_TD_RX_DATA_UNDERUN) {
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fhci_dbg(usb->fhci, "td err fu\n");
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td->toggle = !td->toggle;
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td->actual_len += trans_len;
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} else {
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fhci_dbg(usb->fhci, "td err f!u\n");
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}
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} else {
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fhci_dbg(usb->fhci, "td err !f\n");
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/* it is not a fatal error -retry this transaction */
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td->nak_cnt = 0;
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td->error_cnt++;
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td->status = USB_TD_OK;
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}
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} else if (td->status & USB_TD_TX_ER_NAK) {
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/* there was a NAK response */
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fhci_vdbg(usb->fhci, "td nack\n");
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td->nak_cnt++;
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td->error_cnt = 0;
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td->status = USB_TD_OK;
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} else {
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/* there was no error on transaction */
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td->error_cnt = 0;
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td->nak_cnt = 0;
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td->toggle = !td->toggle;
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td->actual_len += trans_len;
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if (td->len == td->actual_len)
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td_done = true;
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}
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if (td_done)
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fhci_move_td_from_ed_to_done_list(usb, ed);
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}
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/*
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* Flush all transmitted packets from BDs
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* This routine is called when disabling the USB port to flush all
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* transmissions that are already scheduled in the BDs
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*/
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void fhci_flush_all_transmissions(struct fhci_usb *usb)
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{
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u8 mode;
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struct td *td;
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mode = in_8(&usb->fhci->regs->usb_usmod);
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clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
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fhci_flush_bds(usb);
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while ((td = fhci_peek_td_from_frame(usb->actual_frame)) != NULL) {
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struct packet *pkt = td->pkt;
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pkt->status = USB_TD_TX_ER_TIMEOUT;
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fhci_transaction_confirm(usb, pkt);
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}
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usb->actual_frame->frame_status = FRAME_END_TRANSMISSION;
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/* reset the event register */
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out_be16(&usb->fhci->regs->usb_usber, 0xffff);
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/* enable the USB controller */
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out_8(&usb->fhci->regs->usb_usmod, mode | USB_MODE_EN);
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}
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/*
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* This function forms the packet and transmit the packet. This function
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* will handle all endpoint type:ISO,interrupt,control and bulk
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*/
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static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td)
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{
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u32 fw_transaction_time, len = 0;
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struct packet *pkt;
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u8 *data = NULL;
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/* calcalate data address,len and toggle and then add the transaction */
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if (td->toggle == USB_TD_TOGGLE_CARRY)
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td->toggle = ed->toggle_carry;
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switch (ed->mode) {
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case FHCI_TF_ISO:
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len = td->len;
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if (td->type != FHCI_TA_IN)
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data = td->data;
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break;
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case FHCI_TF_CTRL:
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case FHCI_TF_BULK:
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len = min(td->len - td->actual_len, ed->max_pkt_size);
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if (!((td->type == FHCI_TA_IN) &&
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((len + td->actual_len) == td->len)))
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data = td->data + td->actual_len;
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break;
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case FHCI_TF_INTR:
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len = min(td->len, ed->max_pkt_size);
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if (!((td->type == FHCI_TA_IN) &&
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((td->len + CRC_SIZE) >= ed->max_pkt_size)))
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data = td->data;
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break;
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default:
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break;
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}
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if (usb->port_status == FHCI_PORT_FULL)
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fw_transaction_time = (((len + PROTOCOL_OVERHEAD) * 11) >> 4);
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else
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fw_transaction_time = ((len + PROTOCOL_OVERHEAD) * 6);
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/* check if there's enough space in this frame to submit this TD */
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if (usb->actual_frame->total_bytes + len + PROTOCOL_OVERHEAD >=
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usb->max_bytes_per_frame) {
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fhci_vdbg(usb->fhci, "not enough space in this frame: "
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"%d %d %d\n", usb->actual_frame->total_bytes, len,
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usb->max_bytes_per_frame);
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return -1;
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}
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/* check if there's enough time in this frame to submit this TD */
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if (usb->actual_frame->frame_status != FRAME_IS_PREPARED &&
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(usb->actual_frame->frame_status & FRAME_END_TRANSMISSION ||
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(fw_transaction_time + usb->sw_transaction_time >=
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1000 - fhci_get_sof_timer_count(usb)))) {
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fhci_dbg(usb->fhci, "not enough time in this frame\n");
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return -1;
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}
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/* update frame object fields before transmitting */
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pkt = cq_get(&usb->ep0->empty_frame_Q);
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if (!pkt) {
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fhci_dbg(usb->fhci, "there is no empty frame\n");
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return -1;
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}
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td->pkt = pkt;
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pkt->info = 0;
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if (data == NULL) {
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data = cq_get(&usb->ep0->dummy_packets_Q);
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BUG_ON(!data);
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pkt->info = PKT_DUMMY_PACKET;
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}
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pkt->data = data;
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pkt->len = len;
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pkt->status = USB_TD_OK;
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/* update TD status field before transmitting */
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td->status = USB_TD_INPROGRESS;
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/* update actual frame time object with the actual transmission */
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usb->actual_frame->total_bytes += (len + PROTOCOL_OVERHEAD);
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fhci_add_td_to_frame(usb->actual_frame, td);
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if (usb->port_status != FHCI_PORT_FULL &&
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usb->port_status != FHCI_PORT_LOW) {
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pkt->status = USB_TD_TX_ER_TIMEOUT;
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pkt->len = 0;
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fhci_transaction_confirm(usb, pkt);
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} else if (fhci_host_transaction(usb, pkt, td->type, ed->dev_addr,
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ed->ep_addr, ed->mode, ed->speed, td->toggle)) {
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/* remove TD from actual frame */
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list_del_init(&td->frame_lh);
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td->status = USB_TD_OK;
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if (pkt->info & PKT_DUMMY_PACKET)
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cq_put(&usb->ep0->dummy_packets_Q, pkt->data);
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recycle_frame(usb, pkt);
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usb->actual_frame->total_bytes -= (len + PROTOCOL_OVERHEAD);
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fhci_err(usb->fhci, "host transaction failed\n");
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return -1;
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}
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return len;
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}
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static void move_head_to_tail(struct list_head *list)
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{
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struct list_head *node = list->next;
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if (!list_empty(list)) {
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list_move_tail(node, list);
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}
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}
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/*
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* This function goes through the endpoint list and schedules the
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* transactions within this list
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*/
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static int scan_ed_list(struct fhci_usb *usb,
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struct list_head *list, enum fhci_tf_mode list_type)
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{
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static const int frame_part[4] = {
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[FHCI_TF_CTRL] = MAX_BYTES_PER_FRAME,
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[FHCI_TF_ISO] = (MAX_BYTES_PER_FRAME *
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MAX_PERIODIC_FRAME_USAGE) / 100,
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[FHCI_TF_BULK] = MAX_BYTES_PER_FRAME,
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[FHCI_TF_INTR] = (MAX_BYTES_PER_FRAME *
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MAX_PERIODIC_FRAME_USAGE) / 100
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};
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struct ed *ed;
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struct td *td;
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int ans = 1;
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u32 save_transaction_time = usb->sw_transaction_time;
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list_for_each_entry(ed, list, node) {
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td = ed->td_head;
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if (!td || (td && td->status == USB_TD_INPROGRESS))
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continue;
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if (ed->state != FHCI_ED_OPER) {
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if (ed->state == FHCI_ED_URB_DEL) {
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td->status = USB_TD_OK;
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fhci_move_td_from_ed_to_done_list(usb, ed);
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ed->state = FHCI_ED_SKIP;
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}
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continue;
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}
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/*
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* if it isn't interrupt pipe or it is not iso pipe and the
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* interval time passed
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*/
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if ((list_type == FHCI_TF_INTR || list_type == FHCI_TF_ISO) &&
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(((usb->actual_frame->frame_num -
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td->start_frame) & 0x7ff) < td->interval))
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continue;
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if (add_packet(usb, ed, td) < 0)
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continue;
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/* update time stamps in the TD */
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td->start_frame = usb->actual_frame->frame_num;
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usb->sw_transaction_time += save_transaction_time;
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if (usb->actual_frame->total_bytes >=
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usb->max_bytes_per_frame) {
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usb->actual_frame->frame_status =
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FRAME_DATA_END_TRANSMISSION;
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fhci_push_dummy_bd(usb->ep0);
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ans = 0;
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break;
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}
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if (usb->actual_frame->total_bytes >= frame_part[list_type])
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break;
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}
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/* be fair to each ED(move list head around) */
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move_head_to_tail(list);
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usb->sw_transaction_time = save_transaction_time;
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return ans;
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}
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static u32 rotate_frames(struct fhci_usb *usb)
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{
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struct fhci_hcd *fhci = usb->fhci;
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if (!list_empty(&usb->actual_frame->tds_list)) {
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if ((((in_be16(&fhci->pram->frame_num) & 0x07ff) -
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usb->actual_frame->frame_num) & 0x7ff) > 5)
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fhci_flush_actual_frame(usb);
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else
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return -EINVAL;
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}
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usb->actual_frame->frame_status = FRAME_IS_PREPARED;
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usb->actual_frame->frame_num = in_be16(&fhci->pram->frame_num) & 0x7ff;
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usb->actual_frame->total_bytes = 0;
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return 0;
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}
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/*
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* This function schedule the USB transaction and will process the
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* endpoint in the following order: iso, interrupt, control and bulk.
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*/
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void fhci_schedule_transactions(struct fhci_usb *usb)
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{
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int left = 1;
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if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION)
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if (rotate_frames(usb) != 0)
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return;
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if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION)
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return;
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if (usb->actual_frame->total_bytes == 0) {
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/*
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* schedule the next available ISO transfer
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*or next stage of the ISO transfer
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*/
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scan_ed_list(usb, &usb->hc_list->iso_list, FHCI_TF_ISO);
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/*
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* schedule the next available interrupt transfer or
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* the next stage of the interrupt transfer
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*/
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scan_ed_list(usb, &usb->hc_list->intr_list, FHCI_TF_INTR);
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/*
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* schedule the next available control transfer
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* or the next stage of the control transfer
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*/
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left = scan_ed_list(usb, &usb->hc_list->ctrl_list,
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FHCI_TF_CTRL);
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}
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/*
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* schedule the next available bulk transfer or the next stage of the
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* bulk transfer
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*/
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if (left > 0)
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scan_ed_list(usb, &usb->hc_list->bulk_list, FHCI_TF_BULK);
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}
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/* Handles SOF interrupt */
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static void sof_interrupt(struct fhci_hcd *fhci)
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{
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struct fhci_usb *usb = fhci->usb_lld;
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if ((usb->port_status == FHCI_PORT_DISABLED) &&
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(usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_CONNECTION) &&
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!(usb->vroot_hub->port.wPortChange & USB_PORT_STAT_C_CONNECTION)) {
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if (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_LOW_SPEED)
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usb->port_status = FHCI_PORT_LOW;
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else
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usb->port_status = FHCI_PORT_FULL;
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/* Disable IDLE */
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usb->saved_msk &= ~USB_E_IDLE_MASK;
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out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
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}
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gtm_set_exact_timer16(fhci->timer, usb->max_frame_usage, false);
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fhci_host_transmit_actual_frame(usb);
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usb->actual_frame->frame_status = FRAME_IS_TRANSMITTED;
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fhci_schedule_transactions(usb);
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}
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/* Handles device disconnected interrupt on port */
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void fhci_device_disconnected_interrupt(struct fhci_hcd *fhci)
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{
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struct fhci_usb *usb = fhci->usb_lld;
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fhci_dbg(fhci, "-> %s\n", __func__);
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fhci_usb_disable_interrupt(usb);
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clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS);
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usb->port_status = FHCI_PORT_DISABLED;
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fhci_stop_sof_timer(fhci);
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/* Enable IDLE since we want to know if something comes along */
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usb->saved_msk |= USB_E_IDLE_MASK;
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out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
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usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_CONNECTION;
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usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_CONNECTION;
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usb->max_bytes_per_frame = 0;
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fhci_usb_enable_interrupt(usb);
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fhci_dbg(fhci, "<- %s\n", __func__);
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}
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/* detect a new device connected on the USB port */
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void fhci_device_connected_interrupt(struct fhci_hcd *fhci)
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{
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struct fhci_usb *usb = fhci->usb_lld;
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int state;
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int ret;
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fhci_dbg(fhci, "-> %s\n", __func__);
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fhci_usb_disable_interrupt(usb);
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state = fhci_ioports_check_bus_state(fhci);
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/* low-speed device was connected to the USB port */
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if (state == 1) {
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ret = qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
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if (ret) {
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fhci_warn(fhci, "Low-Speed device is not supported, "
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"try use BRGx\n");
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goto out;
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}
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usb->port_status = FHCI_PORT_LOW;
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setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS);
|
|
usb->vroot_hub->port.wPortStatus |=
|
|
(USB_PORT_STAT_LOW_SPEED |
|
|
USB_PORT_STAT_CONNECTION);
|
|
usb->vroot_hub->port.wPortChange |=
|
|
USB_PORT_STAT_C_CONNECTION;
|
|
usb->max_bytes_per_frame =
|
|
(MAX_BYTES_PER_FRAME >> 3) - 7;
|
|
fhci_port_enable(usb);
|
|
} else if (state == 2) {
|
|
ret = qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
|
|
if (ret) {
|
|
fhci_warn(fhci, "Full-Speed device is not supported, "
|
|
"try use CLKx\n");
|
|
goto out;
|
|
}
|
|
|
|
usb->port_status = FHCI_PORT_FULL;
|
|
clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS);
|
|
usb->vroot_hub->port.wPortStatus &=
|
|
~USB_PORT_STAT_LOW_SPEED;
|
|
usb->vroot_hub->port.wPortStatus |=
|
|
USB_PORT_STAT_CONNECTION;
|
|
usb->vroot_hub->port.wPortChange |=
|
|
USB_PORT_STAT_C_CONNECTION;
|
|
usb->max_bytes_per_frame = (MAX_BYTES_PER_FRAME - 15);
|
|
fhci_port_enable(usb);
|
|
}
|
|
out:
|
|
fhci_usb_enable_interrupt(usb);
|
|
fhci_dbg(fhci, "<- %s\n", __func__);
|
|
}
|
|
|
|
irqreturn_t fhci_frame_limit_timer_irq(int irq, void *_hcd)
|
|
{
|
|
struct usb_hcd *hcd = _hcd;
|
|
struct fhci_hcd *fhci = hcd_to_fhci(hcd);
|
|
struct fhci_usb *usb = fhci->usb_lld;
|
|
|
|
spin_lock(&fhci->lock);
|
|
|
|
gtm_set_exact_timer16(fhci->timer, 1000, false);
|
|
|
|
if (usb->actual_frame->frame_status == FRAME_IS_TRANSMITTED) {
|
|
usb->actual_frame->frame_status = FRAME_TIMER_END_TRANSMISSION;
|
|
fhci_push_dummy_bd(usb->ep0);
|
|
}
|
|
|
|
fhci_schedule_transactions(usb);
|
|
|
|
spin_unlock(&fhci->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* Cancel transmission on the USB endpoint */
|
|
static void abort_transmission(struct fhci_usb *usb)
|
|
{
|
|
fhci_dbg(usb->fhci, "-> %s\n", __func__);
|
|
/* issue stop Tx command */
|
|
qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0);
|
|
/* flush Tx FIFOs */
|
|
out_8(&usb->fhci->regs->usb_uscom, USB_CMD_FLUSH_FIFO | EP_ZERO);
|
|
udelay(1000);
|
|
/* reset Tx BDs */
|
|
fhci_flush_bds(usb);
|
|
/* issue restart Tx command */
|
|
qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0);
|
|
fhci_dbg(usb->fhci, "<- %s\n", __func__);
|
|
}
|
|
|
|
irqreturn_t fhci_irq(struct usb_hcd *hcd)
|
|
{
|
|
struct fhci_hcd *fhci = hcd_to_fhci(hcd);
|
|
struct fhci_usb *usb;
|
|
u16 usb_er = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&fhci->lock, flags);
|
|
|
|
usb = fhci->usb_lld;
|
|
|
|
usb_er |= in_be16(&usb->fhci->regs->usb_usber) &
|
|
in_be16(&usb->fhci->regs->usb_usbmr);
|
|
|
|
/* clear event bits for next time */
|
|
out_be16(&usb->fhci->regs->usb_usber, usb_er);
|
|
|
|
fhci_dbg_isr(fhci, usb_er);
|
|
|
|
if (usb_er & USB_E_RESET_MASK) {
|
|
if ((usb->port_status == FHCI_PORT_FULL) ||
|
|
(usb->port_status == FHCI_PORT_LOW)) {
|
|
fhci_device_disconnected_interrupt(fhci);
|
|
usb_er &= ~USB_E_IDLE_MASK;
|
|
} else if (usb->port_status == FHCI_PORT_WAITING) {
|
|
usb->port_status = FHCI_PORT_DISCONNECTING;
|
|
|
|
/* Turn on IDLE since we want to disconnect */
|
|
usb->saved_msk |= USB_E_IDLE_MASK;
|
|
out_be16(&usb->fhci->regs->usb_usber,
|
|
usb->saved_msk);
|
|
} else if (usb->port_status == FHCI_PORT_DISABLED) {
|
|
if (fhci_ioports_check_bus_state(fhci) == 1)
|
|
fhci_device_connected_interrupt(fhci);
|
|
}
|
|
usb_er &= ~USB_E_RESET_MASK;
|
|
}
|
|
|
|
if (usb_er & USB_E_MSF_MASK) {
|
|
abort_transmission(fhci->usb_lld);
|
|
usb_er &= ~USB_E_MSF_MASK;
|
|
}
|
|
|
|
if (usb_er & (USB_E_SOF_MASK | USB_E_SFT_MASK)) {
|
|
sof_interrupt(fhci);
|
|
usb_er &= ~(USB_E_SOF_MASK | USB_E_SFT_MASK);
|
|
}
|
|
|
|
if (usb_er & USB_E_TXB_MASK) {
|
|
fhci_tx_conf_interrupt(fhci->usb_lld);
|
|
usb_er &= ~USB_E_TXB_MASK;
|
|
}
|
|
|
|
if (usb_er & USB_E_TXE1_MASK) {
|
|
fhci_tx_conf_interrupt(fhci->usb_lld);
|
|
usb_er &= ~USB_E_TXE1_MASK;
|
|
}
|
|
|
|
if (usb_er & USB_E_IDLE_MASK) {
|
|
if (usb->port_status == FHCI_PORT_DISABLED) {
|
|
usb_er &= ~USB_E_RESET_MASK;
|
|
fhci_device_connected_interrupt(fhci);
|
|
} else if (usb->port_status ==
|
|
FHCI_PORT_DISCONNECTING) {
|
|
/* XXX usb->port_status = FHCI_PORT_WAITING; */
|
|
/* Disable IDLE */
|
|
usb->saved_msk &= ~USB_E_IDLE_MASK;
|
|
out_be16(&usb->fhci->regs->usb_usbmr,
|
|
usb->saved_msk);
|
|
} else {
|
|
fhci_dbg_isr(fhci, -1);
|
|
}
|
|
|
|
usb_er &= ~USB_E_IDLE_MASK;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fhci->lock, flags);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
/*
|
|
* Process normal completions(error or success) and clean the schedule.
|
|
*
|
|
* This is the main path for handing urbs back to drivers. The only other patth
|
|
* is process_del_list(),which unlinks URBs by scanning EDs,instead of scanning
|
|
* the (re-reversed) done list as this does.
|
|
*/
|
|
static void process_done_list(unsigned long data)
|
|
{
|
|
struct urb *urb;
|
|
struct ed *ed;
|
|
struct td *td;
|
|
struct urb_priv *urb_priv;
|
|
struct fhci_hcd *fhci = (struct fhci_hcd *)data;
|
|
|
|
disable_irq(fhci->timer->irq);
|
|
disable_irq(fhci_to_hcd(fhci)->irq);
|
|
spin_lock(&fhci->lock);
|
|
|
|
td = fhci_remove_td_from_done_list(fhci->hc_list);
|
|
while (td != NULL) {
|
|
urb = td->urb;
|
|
urb_priv = urb->hcpriv;
|
|
ed = td->ed;
|
|
|
|
/* update URB's length and status from TD */
|
|
fhci_done_td(urb, td);
|
|
urb_priv->tds_cnt++;
|
|
|
|
/*
|
|
* if all this urb's TDs are done, call complete()
|
|
* Interrupt transfers are the onley special case:
|
|
* they are reissued,until "deleted" by usb_unlink_urb
|
|
* (real work done in a SOF intr, by process_del_list)
|
|
*/
|
|
if (urb_priv->tds_cnt == urb_priv->num_of_tds) {
|
|
fhci_urb_complete_free(fhci, urb);
|
|
} else if (urb_priv->state == URB_DEL &&
|
|
ed->state == FHCI_ED_SKIP) {
|
|
fhci_del_ed_list(fhci, ed);
|
|
ed->state = FHCI_ED_OPER;
|
|
} else if (ed->state == FHCI_ED_HALTED) {
|
|
urb_priv->state = URB_DEL;
|
|
ed->state = FHCI_ED_URB_DEL;
|
|
fhci_del_ed_list(fhci, ed);
|
|
ed->state = FHCI_ED_OPER;
|
|
}
|
|
|
|
td = fhci_remove_td_from_done_list(fhci->hc_list);
|
|
}
|
|
|
|
spin_unlock(&fhci->lock);
|
|
enable_irq(fhci->timer->irq);
|
|
enable_irq(fhci_to_hcd(fhci)->irq);
|
|
}
|
|
|
|
DECLARE_TASKLET(fhci_tasklet, process_done_list, 0);
|
|
|
|
/* transfer complted callback */
|
|
u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci)
|
|
{
|
|
if (!fhci->process_done_task->state)
|
|
tasklet_schedule(fhci->process_done_task);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* adds urb to the endpoint descriptor list
|
|
* arguments:
|
|
* fhci data structure for the Low level host controller
|
|
* ep USB Host endpoint data structure
|
|
* urb USB request block data structure
|
|
*/
|
|
void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb)
|
|
{
|
|
struct ed *ed = urb->ep->hcpriv;
|
|
struct urb_priv *urb_priv = urb->hcpriv;
|
|
u32 data_len = urb->transfer_buffer_length;
|
|
int urb_state = 0;
|
|
int toggle = 0;
|
|
struct td *td;
|
|
u8 *data;
|
|
u16 cnt = 0;
|
|
|
|
if (ed == NULL) {
|
|
ed = fhci_get_empty_ed(fhci);
|
|
ed->dev_addr = usb_pipedevice(urb->pipe);
|
|
ed->ep_addr = usb_pipeendpoint(urb->pipe);
|
|
switch (usb_pipetype(urb->pipe)) {
|
|
case PIPE_CONTROL:
|
|
ed->mode = FHCI_TF_CTRL;
|
|
break;
|
|
case PIPE_BULK:
|
|
ed->mode = FHCI_TF_BULK;
|
|
break;
|
|
case PIPE_INTERRUPT:
|
|
ed->mode = FHCI_TF_INTR;
|
|
break;
|
|
case PIPE_ISOCHRONOUS:
|
|
ed->mode = FHCI_TF_ISO;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
ed->speed = (urb->dev->speed == USB_SPEED_LOW) ?
|
|
FHCI_LOW_SPEED : FHCI_FULL_SPEED;
|
|
ed->max_pkt_size = usb_maxpacket(urb->dev,
|
|
urb->pipe, usb_pipeout(urb->pipe));
|
|
urb->ep->hcpriv = ed;
|
|
fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n",
|
|
ed->speed, ed->max_pkt_size);
|
|
}
|
|
|
|
/* for ISO transfer calculate start frame index */
|
|
if (ed->mode == FHCI_TF_ISO && urb->transfer_flags & URB_ISO_ASAP)
|
|
urb->start_frame = ed->td_head ? ed->last_iso + 1 :
|
|
get_frame_num(fhci);
|
|
|
|
/*
|
|
* OHCI handles the DATA toggle itself,we just use the USB
|
|
* toggle bits
|
|
*/
|
|
if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
|
|
usb_pipeout(urb->pipe)))
|
|
toggle = USB_TD_TOGGLE_CARRY;
|
|
else {
|
|
toggle = USB_TD_TOGGLE_DATA0;
|
|
usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
|
|
usb_pipeout(urb->pipe), 1);
|
|
}
|
|
|
|
urb_priv->tds_cnt = 0;
|
|
urb_priv->ed = ed;
|
|
if (data_len > 0)
|
|
data = urb->transfer_buffer;
|
|
else
|
|
data = NULL;
|
|
|
|
switch (ed->mode) {
|
|
case FHCI_TF_BULK:
|
|
if (urb->transfer_flags & URB_ZERO_PACKET &&
|
|
urb->transfer_buffer_length > 0 &&
|
|
((urb->transfer_buffer_length %
|
|
usb_maxpacket(urb->dev, urb->pipe,
|
|
usb_pipeout(urb->pipe))) == 0))
|
|
urb_state = US_BULK0;
|
|
while (data_len > 4096) {
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
|
|
usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
|
|
FHCI_TA_IN,
|
|
cnt ? USB_TD_TOGGLE_CARRY :
|
|
toggle,
|
|
data, 4096, 0, 0, true);
|
|
data += 4096;
|
|
data_len -= 4096;
|
|
cnt++;
|
|
}
|
|
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
|
|
usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN,
|
|
cnt ? USB_TD_TOGGLE_CARRY : toggle,
|
|
data, data_len, 0, 0, true);
|
|
cnt++;
|
|
|
|
if (urb->transfer_flags & URB_ZERO_PACKET &&
|
|
cnt < urb_priv->num_of_tds) {
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
|
|
usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
|
|
FHCI_TA_IN,
|
|
USB_TD_TOGGLE_CARRY, NULL, 0, 0, 0, true);
|
|
cnt++;
|
|
}
|
|
break;
|
|
case FHCI_TF_INTR:
|
|
urb->start_frame = get_frame_num(fhci) + 1;
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
|
|
usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN,
|
|
USB_TD_TOGGLE_DATA0, data, data_len,
|
|
urb->interval, urb->start_frame, true);
|
|
break;
|
|
case FHCI_TF_CTRL:
|
|
ed->dev_addr = usb_pipedevice(urb->pipe);
|
|
ed->max_pkt_size = usb_maxpacket(urb->dev, urb->pipe,
|
|
usb_pipeout(urb->pipe));
|
|
/* setup stage */
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, FHCI_TA_SETUP,
|
|
USB_TD_TOGGLE_DATA0, urb->setup_packet, 8, 0, 0, true);
|
|
|
|
/* data stage */
|
|
if (data_len > 0) {
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
|
|
usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
|
|
FHCI_TA_IN,
|
|
USB_TD_TOGGLE_DATA1, data, data_len, 0, 0,
|
|
true);
|
|
}
|
|
|
|
/* status stage */
|
|
if (data_len > 0)
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
|
|
(usb_pipeout(urb->pipe) ? FHCI_TA_IN :
|
|
FHCI_TA_OUT),
|
|
USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true);
|
|
else
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
|
|
FHCI_TA_IN,
|
|
USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true);
|
|
|
|
urb_state = US_CTRL_SETUP;
|
|
break;
|
|
case FHCI_TF_ISO:
|
|
for (cnt = 0; cnt < urb->number_of_packets; cnt++) {
|
|
u16 frame = urb->start_frame;
|
|
|
|
/*
|
|
* FIXME scheduling should handle frame counter
|
|
* roll-around ... exotic case (and OHCI has
|
|
* a 2^16 iso range, vs other HCs max of 2^10)
|
|
*/
|
|
frame += cnt * urb->interval;
|
|
frame &= 0x07ff;
|
|
td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
|
|
usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
|
|
FHCI_TA_IN,
|
|
USB_TD_TOGGLE_DATA0,
|
|
data + urb->iso_frame_desc[cnt].offset,
|
|
urb->iso_frame_desc[cnt].length,
|
|
urb->interval, frame, true);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* set the state of URB
|
|
* control pipe:3 states -- setup,data,status
|
|
* interrupt and bulk pipe:1 state -- data
|
|
*/
|
|
urb->pipe &= ~0x1f;
|
|
urb->pipe |= urb_state & 0x1f;
|
|
|
|
urb_priv->state = URB_INPROGRESS;
|
|
|
|
if (!ed->td_head) {
|
|
ed->state = FHCI_ED_OPER;
|
|
switch (ed->mode) {
|
|
case FHCI_TF_CTRL:
|
|
list_add(&ed->node, &fhci->hc_list->ctrl_list);
|
|
break;
|
|
case FHCI_TF_BULK:
|
|
list_add(&ed->node, &fhci->hc_list->bulk_list);
|
|
break;
|
|
case FHCI_TF_INTR:
|
|
list_add(&ed->node, &fhci->hc_list->intr_list);
|
|
break;
|
|
case FHCI_TF_ISO:
|
|
list_add(&ed->node, &fhci->hc_list->iso_list);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
fhci_add_tds_to_ed(ed, urb_priv->tds, urb_priv->num_of_tds);
|
|
fhci->active_urbs++;
|
|
}
|