| /* |
| * Freescale QUICC Engine USB Host Controller Driver |
| * |
| * Copyright (c) Freescale Semicondutor, Inc. 2006, 2011. |
| * 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/delay.h> |
| #include <linux/errno.h> |
| #include <linux/list.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/usb.h> |
| #include <linux/usb/hcd.h> |
| #include <asm/qe.h> |
| #include <asm/fsl_gtm.h> |
| #include "fhci.h" |
| |
| static void recycle_frame(struct fhci_usb *usb, struct packet *pkt) |
| { |
| pkt->data = NULL; |
| pkt->len = 0; |
| pkt->status = USB_TD_OK; |
| pkt->info = 0; |
| pkt->priv_data = NULL; |
| |
| cq_put(&usb->ep0->empty_frame_Q, pkt); |
| } |
| |
| /* confirm submitted packet */ |
| void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt) |
| { |
| struct td *td; |
| struct packet *td_pkt; |
| struct ed *ed; |
| u32 trans_len; |
| bool td_done = false; |
| |
| td = fhci_remove_td_from_frame(usb->actual_frame); |
| td_pkt = td->pkt; |
| trans_len = pkt->len; |
| td->status = pkt->status; |
| if (td->type == FHCI_TA_IN && td_pkt->info & PKT_DUMMY_PACKET) { |
| if ((td->data + td->actual_len) && trans_len) |
| memcpy(td->data + td->actual_len, pkt->data, |
| trans_len); |
| cq_put(&usb->ep0->dummy_packets_Q, pkt->data); |
| } |
| |
| recycle_frame(usb, pkt); |
| |
| ed = td->ed; |
| if (ed->mode == FHCI_TF_ISO) { |
| if (ed->td_list.next->next != &ed->td_list) { |
| struct td *td_next = |
| list_entry(ed->td_list.next->next, struct td, |
| node); |
| |
| td_next->start_frame = usb->actual_frame->frame_num; |
| } |
| td->actual_len = trans_len; |
| td_done = true; |
| } else if ((td->status & USB_TD_ERROR) && |
| !(td->status & USB_TD_TX_ER_NAK)) { |
| /* |
| * There was an error on the transaction (but not NAK). |
| * If it is fatal error (data underrun, stall, bad pid or 3 |
| * errors exceeded), mark this TD as done. |
| */ |
| if ((td->status & USB_TD_RX_DATA_UNDERUN) || |
| (td->status & USB_TD_TX_ER_STALL) || |
| (td->status & USB_TD_RX_ER_PID) || |
| (++td->error_cnt >= 3)) { |
| ed->state = FHCI_ED_HALTED; |
| td_done = true; |
| |
| if (td->status & USB_TD_RX_DATA_UNDERUN) { |
| fhci_dbg(usb->fhci, "td err fu\n"); |
| td->toggle = !td->toggle; |
| td->actual_len += trans_len; |
| } else { |
| fhci_dbg(usb->fhci, "td err f!u\n"); |
| } |
| } else { |
| fhci_dbg(usb->fhci, "td err !f\n"); |
| /* it is not a fatal error -retry this transaction */ |
| td->nak_cnt = 0; |
| td->error_cnt++; |
| td->status = USB_TD_OK; |
| } |
| } else if (td->status & USB_TD_TX_ER_NAK) { |
| /* there was a NAK response */ |
| fhci_vdbg(usb->fhci, "td nack\n"); |
| td->nak_cnt++; |
| td->error_cnt = 0; |
| td->status = USB_TD_OK; |
| } else { |
| /* there was no error on transaction */ |
| td->error_cnt = 0; |
| td->nak_cnt = 0; |
| td->toggle = !td->toggle; |
| td->actual_len += trans_len; |
| |
| if (td->len == td->actual_len) |
| td_done = true; |
| } |
| |
| if (td_done) |
| fhci_move_td_from_ed_to_done_list(usb, ed); |
| } |
| |
| /* |
| * Flush all transmitted packets from BDs |
| * This routine is called when disabling the USB port to flush all |
| * transmissions that are already scheduled in the BDs |
| */ |
| void fhci_flush_all_transmissions(struct fhci_usb *usb) |
| { |
| u8 mode; |
| struct td *td; |
| |
| mode = in_8(&usb->fhci->regs->usb_usmod); |
| clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN); |
| |
| fhci_flush_bds(usb); |
| |
| while ((td = fhci_peek_td_from_frame(usb->actual_frame)) != NULL) { |
| struct packet *pkt = td->pkt; |
| |
| pkt->status = USB_TD_TX_ER_TIMEOUT; |
| fhci_transaction_confirm(usb, pkt); |
| } |
| |
| usb->actual_frame->frame_status = FRAME_END_TRANSMISSION; |
| |
| /* reset the event register */ |
| out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
| /* enable the USB controller */ |
| out_8(&usb->fhci->regs->usb_usmod, mode | USB_MODE_EN); |
| } |
| |
| /* |
| * This function forms the packet and transmit the packet. This function |
| * will handle all endpoint type:ISO,interrupt,control and bulk |
| */ |
| static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td) |
| { |
| u32 fw_transaction_time, len = 0; |
| struct packet *pkt; |
| u8 *data = NULL; |
| |
| /* calcalate data address,len and toggle and then add the transaction */ |
| if (td->toggle == USB_TD_TOGGLE_CARRY) |
| td->toggle = ed->toggle_carry; |
| |
| switch (ed->mode) { |
| case FHCI_TF_ISO: |
| len = td->len; |
| if (td->type != FHCI_TA_IN) |
| data = td->data; |
| break; |
| case FHCI_TF_CTRL: |
| case FHCI_TF_BULK: |
| len = min(td->len - td->actual_len, ed->max_pkt_size); |
| if (!((td->type == FHCI_TA_IN) && |
| ((len + td->actual_len) == td->len))) |
| data = td->data + td->actual_len; |
| break; |
| case FHCI_TF_INTR: |
| len = min(td->len, ed->max_pkt_size); |
| if (!((td->type == FHCI_TA_IN) && |
| ((td->len + CRC_SIZE) >= ed->max_pkt_size))) |
| data = td->data; |
| break; |
| default: |
| break; |
| } |
| |
| if (usb->port_status == FHCI_PORT_FULL) |
| fw_transaction_time = (((len + PROTOCOL_OVERHEAD) * 11) >> 4); |
| else |
| fw_transaction_time = ((len + PROTOCOL_OVERHEAD) * 6); |
| |
| /* check if there's enough space in this frame to submit this TD */ |
| if (usb->actual_frame->total_bytes + len + PROTOCOL_OVERHEAD >= |
| usb->max_bytes_per_frame) { |
| fhci_vdbg(usb->fhci, "not enough space in this frame: " |
| "%d %d %d\n", usb->actual_frame->total_bytes, len, |
| usb->max_bytes_per_frame); |
| return -1; |
| } |
| |
| /* check if there's enough time in this frame to submit this TD */ |
| if (usb->actual_frame->frame_status != FRAME_IS_PREPARED && |
| (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION || |
| (fw_transaction_time + usb->sw_transaction_time >= |
| 1000 - fhci_get_sof_timer_count(usb)))) { |
| fhci_dbg(usb->fhci, "not enough time in this frame\n"); |
| return -1; |
| } |
| |
| /* update frame object fields before transmitting */ |
| pkt = cq_get(&usb->ep0->empty_frame_Q); |
| if (!pkt) { |
| fhci_dbg(usb->fhci, "there is no empty frame\n"); |
| return -1; |
| } |
| td->pkt = pkt; |
| |
| pkt->info = 0; |
| if (data == NULL) { |
| data = cq_get(&usb->ep0->dummy_packets_Q); |
| BUG_ON(!data); |
| pkt->info = PKT_DUMMY_PACKET; |
| } |
| pkt->data = data; |
| pkt->len = len; |
| pkt->status = USB_TD_OK; |
| /* update TD status field before transmitting */ |
| td->status = USB_TD_INPROGRESS; |
| /* update actual frame time object with the actual transmission */ |
| usb->actual_frame->total_bytes += (len + PROTOCOL_OVERHEAD); |
| fhci_add_td_to_frame(usb->actual_frame, td); |
| |
| if (usb->port_status != FHCI_PORT_FULL && |
| usb->port_status != FHCI_PORT_LOW) { |
| pkt->status = USB_TD_TX_ER_TIMEOUT; |
| pkt->len = 0; |
| fhci_transaction_confirm(usb, pkt); |
| } else if (fhci_host_transaction(usb, pkt, td->type, ed->dev_addr, |
| ed->ep_addr, ed->mode, ed->speed, td->toggle)) { |
| /* remove TD from actual frame */ |
| list_del_init(&td->frame_lh); |
| td->status = USB_TD_OK; |
| if (pkt->info & PKT_DUMMY_PACKET) |
| cq_put(&usb->ep0->dummy_packets_Q, pkt->data); |
| recycle_frame(usb, pkt); |
| usb->actual_frame->total_bytes -= (len + PROTOCOL_OVERHEAD); |
| fhci_err(usb->fhci, "host transaction failed\n"); |
| return -1; |
| } |
| |
| return len; |
| } |
| |
| static void move_head_to_tail(struct list_head *list) |
| { |
| struct list_head *node = list->next; |
| |
| if (!list_empty(list)) { |
| list_del(node); |
| list_add_tail(node, list); |
| } |
| } |
| |
| /* |
| * This function goes through the endpoint list and schedules the |
| * transactions within this list |
| */ |
| static int scan_ed_list(struct fhci_usb *usb, |
| struct list_head *list, enum fhci_tf_mode list_type) |
| { |
| static const int frame_part[4] = { |
| [FHCI_TF_CTRL] = MAX_BYTES_PER_FRAME, |
| [FHCI_TF_ISO] = (MAX_BYTES_PER_FRAME * |
| MAX_PERIODIC_FRAME_USAGE) / 100, |
| [FHCI_TF_BULK] = MAX_BYTES_PER_FRAME, |
| [FHCI_TF_INTR] = (MAX_BYTES_PER_FRAME * |
| MAX_PERIODIC_FRAME_USAGE) / 100 |
| }; |
| struct ed *ed; |
| struct td *td; |
| int ans = 1; |
| u32 save_transaction_time = usb->sw_transaction_time; |
| |
| list_for_each_entry(ed, list, node) { |
| td = ed->td_head; |
| |
| if (!td || (td && td->status == USB_TD_INPROGRESS)) |
| continue; |
| |
| if (ed->state != FHCI_ED_OPER) { |
| if (ed->state == FHCI_ED_URB_DEL) { |
| td->status = USB_TD_OK; |
| fhci_move_td_from_ed_to_done_list(usb, ed); |
| ed->state = FHCI_ED_SKIP; |
| } |
| continue; |
| } |
| |
| /* |
| * if it isn't interrupt pipe or it is not iso pipe and the |
| * interval time passed |
| */ |
| if ((list_type == FHCI_TF_INTR || list_type == FHCI_TF_ISO) && |
| (((usb->actual_frame->frame_num - |
| td->start_frame) & 0x7ff) < td->interval)) |
| continue; |
| |
| if (add_packet(usb, ed, td) < 0) |
| continue; |
| |
| /* update time stamps in the TD */ |
| td->start_frame = usb->actual_frame->frame_num; |
| usb->sw_transaction_time += save_transaction_time; |
| |
| if (usb->actual_frame->total_bytes >= |
| usb->max_bytes_per_frame) { |
| usb->actual_frame->frame_status = |
| FRAME_DATA_END_TRANSMISSION; |
| fhci_push_dummy_bd(usb->ep0); |
| ans = 0; |
| break; |
| } |
| |
| if (usb->actual_frame->total_bytes >= frame_part[list_type]) |
| break; |
| } |
| |
| /* be fair to each ED(move list head around) */ |
| move_head_to_tail(list); |
| usb->sw_transaction_time = save_transaction_time; |
| |
| return ans; |
| } |
| |
| static u32 rotate_frames(struct fhci_usb *usb) |
| { |
| struct fhci_hcd *fhci = usb->fhci; |
| |
| if (!list_empty(&usb->actual_frame->tds_list)) { |
| if ((((in_be16(&fhci->pram->frame_num) & 0x07ff) - |
| usb->actual_frame->frame_num) & 0x7ff) > 5) |
| fhci_flush_actual_frame(usb); |
| else |
| return -EINVAL; |
| } |
| |
| usb->actual_frame->frame_status = FRAME_IS_PREPARED; |
| usb->actual_frame->frame_num = in_be16(&fhci->pram->frame_num) & 0x7ff; |
| usb->actual_frame->total_bytes = 0; |
| |
| return 0; |
| } |
| |
| /* |
| * This function schedule the USB transaction and will process the |
| * endpoint in the following order: iso, interrupt, control and bulk. |
| */ |
| void fhci_schedule_transactions(struct fhci_usb *usb) |
| { |
| int left = 1; |
| |
| if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION) |
| if (rotate_frames(usb) != 0) |
| return; |
| |
| if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION) |
| return; |
| |
| if (usb->actual_frame->total_bytes == 0) { |
| /* |
| * schedule the next available ISO transfer |
| *or next stage of the ISO transfer |
| */ |
| scan_ed_list(usb, &usb->hc_list->iso_list, FHCI_TF_ISO); |
| |
| /* |
| * schedule the next available interrupt transfer or |
| * the next stage of the interrupt transfer |
| */ |
| scan_ed_list(usb, &usb->hc_list->intr_list, FHCI_TF_INTR); |
| |
| /* |
| * schedule the next available control transfer |
| * or the next stage of the control transfer |
| */ |
| left = scan_ed_list(usb, &usb->hc_list->ctrl_list, |
| FHCI_TF_CTRL); |
| } |
| |
| /* |
| * schedule the next available bulk transfer or the next stage of the |
| * bulk transfer |
| */ |
| if (left > 0) |
| scan_ed_list(usb, &usb->hc_list->bulk_list, FHCI_TF_BULK); |
| } |
| |
| /* Handles SOF interrupt */ |
| static void sof_interrupt(struct fhci_hcd *fhci) |
| { |
| struct fhci_usb *usb = fhci->usb_lld; |
| |
| if ((usb->port_status == FHCI_PORT_DISABLED) && |
| (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_CONNECTION) && |
| !(usb->vroot_hub->port.wPortChange & USB_PORT_STAT_C_CONNECTION)) { |
| if (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_LOW_SPEED) |
| usb->port_status = FHCI_PORT_LOW; |
| else |
| usb->port_status = FHCI_PORT_FULL; |
| /* Disable IDLE */ |
| usb->saved_msk &= ~USB_E_IDLE_MASK; |
| out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); |
| } |
| |
| gtm_set_exact_timer16(fhci->timer, usb->max_frame_usage, false); |
| |
| fhci_host_transmit_actual_frame(usb); |
| usb->actual_frame->frame_status = FRAME_IS_TRANSMITTED; |
| |
| fhci_schedule_transactions(usb); |
| } |
| |
| /* Handles device disconnected interrupt on port */ |
| void fhci_device_disconnected_interrupt(struct fhci_hcd *fhci) |
| { |
| struct fhci_usb *usb = fhci->usb_lld; |
| |
| fhci_dbg(fhci, "-> %s\n", __func__); |
| |
| fhci_usb_disable_interrupt(usb); |
| clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); |
| usb->port_status = FHCI_PORT_DISABLED; |
| |
| fhci_stop_sof_timer(fhci); |
| |
| /* Enable IDLE since we want to know if something comes along */ |
| usb->saved_msk |= USB_E_IDLE_MASK; |
| out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); |
| |
| usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_CONNECTION; |
| usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_CONNECTION; |
| usb->max_bytes_per_frame = 0; |
| fhci_usb_enable_interrupt(usb); |
| |
| fhci_dbg(fhci, "<- %s\n", __func__); |
| } |
| |
| /* detect a new device connected on the USB port */ |
| void fhci_device_connected_interrupt(struct fhci_hcd *fhci) |
| { |
| |
| struct fhci_usb *usb = fhci->usb_lld; |
| int state; |
| int ret; |
| |
| fhci_dbg(fhci, "-> %s\n", __func__); |
| |
| fhci_usb_disable_interrupt(usb); |
| state = fhci_ioports_check_bus_state(fhci); |
| |
| /* low-speed device was connected to the USB port */ |
| if (state == 1) { |
| ret = qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); |
| if (ret) { |
| fhci_warn(fhci, "Low-Speed device is not supported, " |
| "try use BRGx\n"); |
| goto out; |
| } |
| |
| usb->port_status = FHCI_PORT_LOW; |
| 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++; |
| } |