751 lines
16 KiB
C
751 lines
16 KiB
C
/*
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*
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* AVM BlueFRITZ! USB driver
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*
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* Copyright (C) 2003-2006 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/usb.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#define VERSION "1.2"
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static struct usb_driver bfusb_driver;
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static const struct usb_device_id bfusb_table[] = {
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/* AVM BlueFRITZ! USB */
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{ USB_DEVICE(0x057c, 0x2200) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, bfusb_table);
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#define BFUSB_MAX_BLOCK_SIZE 256
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#define BFUSB_BLOCK_TIMEOUT 3000
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#define BFUSB_TX_PROCESS 1
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#define BFUSB_TX_WAKEUP 2
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#define BFUSB_MAX_BULK_TX 2
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#define BFUSB_MAX_BULK_RX 2
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struct bfusb_data {
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struct hci_dev *hdev;
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unsigned long state;
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struct usb_device *udev;
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unsigned int bulk_in_ep;
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unsigned int bulk_out_ep;
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unsigned int bulk_pkt_size;
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rwlock_t lock;
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struct sk_buff_head transmit_q;
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struct sk_buff *reassembly;
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atomic_t pending_tx;
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struct sk_buff_head pending_q;
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struct sk_buff_head completed_q;
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};
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struct bfusb_data_scb {
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struct urb *urb;
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};
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static void bfusb_tx_complete(struct urb *urb);
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static void bfusb_rx_complete(struct urb *urb);
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static struct urb *bfusb_get_completed(struct bfusb_data *data)
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{
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struct sk_buff *skb;
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struct urb *urb = NULL;
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BT_DBG("bfusb %p", data);
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skb = skb_dequeue(&data->completed_q);
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if (skb) {
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urb = ((struct bfusb_data_scb *) skb->cb)->urb;
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kfree_skb(skb);
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}
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return urb;
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}
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static void bfusb_unlink_urbs(struct bfusb_data *data)
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{
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struct sk_buff *skb;
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struct urb *urb;
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BT_DBG("bfusb %p", data);
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while ((skb = skb_dequeue(&data->pending_q))) {
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urb = ((struct bfusb_data_scb *) skb->cb)->urb;
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usb_kill_urb(urb);
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skb_queue_tail(&data->completed_q, skb);
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}
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while ((urb = bfusb_get_completed(data)))
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usb_free_urb(urb);
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}
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static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
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{
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struct bfusb_data_scb *scb = (void *) skb->cb;
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struct urb *urb = bfusb_get_completed(data);
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int err, pipe;
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BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
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if (!urb) {
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb)
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return -ENOMEM;
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}
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pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
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usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
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bfusb_tx_complete, skb);
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scb->urb = urb;
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skb_queue_tail(&data->pending_q, skb);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err) {
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BT_ERR("%s bulk tx submit failed urb %p err %d",
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data->hdev->name, urb, err);
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skb_unlink(skb, &data->pending_q);
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usb_free_urb(urb);
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} else
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atomic_inc(&data->pending_tx);
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return err;
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}
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static void bfusb_tx_wakeup(struct bfusb_data *data)
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{
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struct sk_buff *skb;
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BT_DBG("bfusb %p", data);
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if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
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set_bit(BFUSB_TX_WAKEUP, &data->state);
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return;
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}
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do {
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clear_bit(BFUSB_TX_WAKEUP, &data->state);
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while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
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(skb = skb_dequeue(&data->transmit_q))) {
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if (bfusb_send_bulk(data, skb) < 0) {
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skb_queue_head(&data->transmit_q, skb);
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break;
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}
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}
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} while (test_bit(BFUSB_TX_WAKEUP, &data->state));
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clear_bit(BFUSB_TX_PROCESS, &data->state);
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}
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static void bfusb_tx_complete(struct urb *urb)
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{
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struct sk_buff *skb = (struct sk_buff *) urb->context;
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struct bfusb_data *data = (struct bfusb_data *) skb->dev;
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BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
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atomic_dec(&data->pending_tx);
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if (!test_bit(HCI_RUNNING, &data->hdev->flags))
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return;
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if (!urb->status)
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data->hdev->stat.byte_tx += skb->len;
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else
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data->hdev->stat.err_tx++;
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read_lock(&data->lock);
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skb_unlink(skb, &data->pending_q);
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skb_queue_tail(&data->completed_q, skb);
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bfusb_tx_wakeup(data);
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read_unlock(&data->lock);
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}
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static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
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{
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struct bfusb_data_scb *scb;
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struct sk_buff *skb;
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int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
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BT_DBG("bfusb %p urb %p", data, urb);
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if (!urb) {
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb)
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return -ENOMEM;
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}
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skb = bt_skb_alloc(size, GFP_ATOMIC);
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if (!skb) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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skb->dev = (void *) data;
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scb = (struct bfusb_data_scb *) skb->cb;
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scb->urb = urb;
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pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
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usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
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bfusb_rx_complete, skb);
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skb_queue_tail(&data->pending_q, skb);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err) {
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BT_ERR("%s bulk rx submit failed urb %p err %d",
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data->hdev->name, urb, err);
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skb_unlink(skb, &data->pending_q);
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kfree_skb(skb);
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usb_free_urb(urb);
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}
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return err;
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}
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static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
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{
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BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
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if (hdr & 0x10) {
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BT_ERR("%s error in block", data->hdev->name);
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kfree_skb(data->reassembly);
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data->reassembly = NULL;
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return -EIO;
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}
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if (hdr & 0x04) {
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struct sk_buff *skb;
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unsigned char pkt_type;
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int pkt_len = 0;
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if (data->reassembly) {
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BT_ERR("%s unexpected start block", data->hdev->name);
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kfree_skb(data->reassembly);
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data->reassembly = NULL;
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}
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if (len < 1) {
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BT_ERR("%s no packet type found", data->hdev->name);
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return -EPROTO;
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}
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pkt_type = *buf++; len--;
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switch (pkt_type) {
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case HCI_EVENT_PKT:
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if (len >= HCI_EVENT_HDR_SIZE) {
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struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
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pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
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} else {
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BT_ERR("%s event block is too short", data->hdev->name);
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return -EILSEQ;
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}
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break;
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case HCI_ACLDATA_PKT:
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if (len >= HCI_ACL_HDR_SIZE) {
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struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
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pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
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} else {
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BT_ERR("%s data block is too short", data->hdev->name);
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return -EILSEQ;
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}
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break;
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case HCI_SCODATA_PKT:
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if (len >= HCI_SCO_HDR_SIZE) {
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struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
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pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
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} else {
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BT_ERR("%s audio block is too short", data->hdev->name);
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return -EILSEQ;
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}
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break;
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}
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skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
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if (!skb) {
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BT_ERR("%s no memory for the packet", data->hdev->name);
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return -ENOMEM;
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}
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bt_cb(skb)->pkt_type = pkt_type;
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data->reassembly = skb;
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} else {
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if (!data->reassembly) {
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BT_ERR("%s unexpected continuation block", data->hdev->name);
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return -EIO;
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}
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}
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if (len > 0)
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memcpy(skb_put(data->reassembly, len), buf, len);
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if (hdr & 0x08) {
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hci_recv_frame(data->hdev, data->reassembly);
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data->reassembly = NULL;
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}
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return 0;
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}
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static void bfusb_rx_complete(struct urb *urb)
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{
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struct sk_buff *skb = (struct sk_buff *) urb->context;
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struct bfusb_data *data = (struct bfusb_data *) skb->dev;
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unsigned char *buf = urb->transfer_buffer;
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int count = urb->actual_length;
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int err, hdr, len;
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BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
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read_lock(&data->lock);
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if (!test_bit(HCI_RUNNING, &data->hdev->flags))
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goto unlock;
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if (urb->status || !count)
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goto resubmit;
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data->hdev->stat.byte_rx += count;
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skb_put(skb, count);
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while (count) {
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hdr = buf[0] | (buf[1] << 8);
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if (hdr & 0x4000) {
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len = 0;
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count -= 2;
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buf += 2;
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} else {
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len = (buf[2] == 0) ? 256 : buf[2];
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count -= 3;
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buf += 3;
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}
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if (count < len) {
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BT_ERR("%s block extends over URB buffer ranges",
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data->hdev->name);
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}
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if ((hdr & 0xe1) == 0xc1)
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bfusb_recv_block(data, hdr, buf, len);
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count -= len;
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buf += len;
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}
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skb_unlink(skb, &data->pending_q);
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kfree_skb(skb);
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bfusb_rx_submit(data, urb);
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read_unlock(&data->lock);
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return;
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resubmit:
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urb->dev = data->udev;
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err) {
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BT_ERR("%s bulk resubmit failed urb %p err %d",
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data->hdev->name, urb, err);
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}
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unlock:
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read_unlock(&data->lock);
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}
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static int bfusb_open(struct hci_dev *hdev)
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{
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struct bfusb_data *data = hci_get_drvdata(hdev);
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unsigned long flags;
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int i, err;
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BT_DBG("hdev %p bfusb %p", hdev, data);
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if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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write_lock_irqsave(&data->lock, flags);
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err = bfusb_rx_submit(data, NULL);
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if (!err) {
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for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
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bfusb_rx_submit(data, NULL);
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} else {
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clear_bit(HCI_RUNNING, &hdev->flags);
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}
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write_unlock_irqrestore(&data->lock, flags);
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return err;
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}
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static int bfusb_flush(struct hci_dev *hdev)
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{
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struct bfusb_data *data = hci_get_drvdata(hdev);
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BT_DBG("hdev %p bfusb %p", hdev, data);
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skb_queue_purge(&data->transmit_q);
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return 0;
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}
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static int bfusb_close(struct hci_dev *hdev)
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{
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struct bfusb_data *data = hci_get_drvdata(hdev);
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unsigned long flags;
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BT_DBG("hdev %p bfusb %p", hdev, data);
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if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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write_lock_irqsave(&data->lock, flags);
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write_unlock_irqrestore(&data->lock, flags);
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bfusb_unlink_urbs(data);
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bfusb_flush(hdev);
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return 0;
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}
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static int bfusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct bfusb_data *data = hci_get_drvdata(hdev);
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struct sk_buff *nskb;
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unsigned char buf[3];
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int sent = 0, size, count;
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BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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switch (bt_cb(skb)->pkt_type) {
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case HCI_COMMAND_PKT:
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hdev->stat.cmd_tx++;
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break;
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case HCI_ACLDATA_PKT:
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hdev->stat.acl_tx++;
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break;
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case HCI_SCODATA_PKT:
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hdev->stat.sco_tx++;
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break;
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};
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/* Prepend skb with frame type */
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memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
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count = skb->len;
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/* Max HCI frame size seems to be 1511 + 1 */
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nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
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if (!nskb) {
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BT_ERR("Can't allocate memory for new packet");
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return -ENOMEM;
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}
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nskb->dev = (void *) data;
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while (count) {
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size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
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buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
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buf[1] = 0x00;
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buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
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memcpy(skb_put(nskb, 3), buf, 3);
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skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
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sent += size;
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count -= size;
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}
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/* Don't send frame with multiple size of bulk max packet */
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if ((nskb->len % data->bulk_pkt_size) == 0) {
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buf[0] = 0xdd;
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buf[1] = 0x00;
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memcpy(skb_put(nskb, 2), buf, 2);
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}
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read_lock(&data->lock);
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skb_queue_tail(&data->transmit_q, nskb);
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bfusb_tx_wakeup(data);
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read_unlock(&data->lock);
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kfree_skb(skb);
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return 0;
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}
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static int bfusb_load_firmware(struct bfusb_data *data,
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const unsigned char *firmware, int count)
|
|
{
|
|
unsigned char *buf;
|
|
int err, pipe, len, size, sent = 0;
|
|
|
|
BT_DBG("bfusb %p udev %p", data, data->udev);
|
|
|
|
BT_INFO("BlueFRITZ! USB loading firmware");
|
|
|
|
buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL);
|
|
if (!buf) {
|
|
BT_ERR("Can't allocate memory chunk for firmware");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pipe = usb_sndctrlpipe(data->udev, 0);
|
|
|
|
if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
|
|
0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
|
|
BT_ERR("Can't change to loading configuration");
|
|
kfree(buf);
|
|
return -EBUSY;
|
|
}
|
|
|
|
data->udev->toggle[0] = data->udev->toggle[1] = 0;
|
|
|
|
pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
|
|
|
|
while (count) {
|
|
size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
|
|
|
|
memcpy(buf, firmware + sent, size);
|
|
|
|
err = usb_bulk_msg(data->udev, pipe, buf, size,
|
|
&len, BFUSB_BLOCK_TIMEOUT);
|
|
|
|
if (err || (len != size)) {
|
|
BT_ERR("Error in firmware loading");
|
|
goto error;
|
|
}
|
|
|
|
sent += size;
|
|
count -= size;
|
|
}
|
|
|
|
err = usb_bulk_msg(data->udev, pipe, NULL, 0,
|
|
&len, BFUSB_BLOCK_TIMEOUT);
|
|
if (err < 0) {
|
|
BT_ERR("Error in null packet request");
|
|
goto error;
|
|
}
|
|
|
|
pipe = usb_sndctrlpipe(data->udev, 0);
|
|
|
|
err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
|
|
0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
|
|
if (err < 0) {
|
|
BT_ERR("Can't change to running configuration");
|
|
goto error;
|
|
}
|
|
|
|
data->udev->toggle[0] = data->udev->toggle[1] = 0;
|
|
|
|
BT_INFO("BlueFRITZ! USB device ready");
|
|
|
|
kfree(buf);
|
|
return 0;
|
|
|
|
error:
|
|
kfree(buf);
|
|
|
|
pipe = usb_sndctrlpipe(data->udev, 0);
|
|
|
|
usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
|
|
0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
|
|
{
|
|
const struct firmware *firmware;
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct usb_host_endpoint *bulk_out_ep;
|
|
struct usb_host_endpoint *bulk_in_ep;
|
|
struct hci_dev *hdev;
|
|
struct bfusb_data *data;
|
|
|
|
BT_DBG("intf %p id %p", intf, id);
|
|
|
|
/* Check number of endpoints */
|
|
if (intf->cur_altsetting->desc.bNumEndpoints < 2)
|
|
return -EIO;
|
|
|
|
bulk_out_ep = &intf->cur_altsetting->endpoint[0];
|
|
bulk_in_ep = &intf->cur_altsetting->endpoint[1];
|
|
|
|
if (!bulk_out_ep || !bulk_in_ep) {
|
|
BT_ERR("Bulk endpoints not found");
|
|
goto done;
|
|
}
|
|
|
|
/* Initialize control structure and load firmware */
|
|
data = devm_kzalloc(&intf->dev, sizeof(struct bfusb_data), GFP_KERNEL);
|
|
if (!data) {
|
|
BT_ERR("Can't allocate memory for control structure");
|
|
goto done;
|
|
}
|
|
|
|
data->udev = udev;
|
|
data->bulk_in_ep = bulk_in_ep->desc.bEndpointAddress;
|
|
data->bulk_out_ep = bulk_out_ep->desc.bEndpointAddress;
|
|
data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
|
|
|
|
rwlock_init(&data->lock);
|
|
|
|
data->reassembly = NULL;
|
|
|
|
skb_queue_head_init(&data->transmit_q);
|
|
skb_queue_head_init(&data->pending_q);
|
|
skb_queue_head_init(&data->completed_q);
|
|
|
|
if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
|
|
BT_ERR("Firmware request failed");
|
|
goto done;
|
|
}
|
|
|
|
BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
|
|
|
|
if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
|
|
BT_ERR("Firmware loading failed");
|
|
goto release;
|
|
}
|
|
|
|
release_firmware(firmware);
|
|
|
|
/* Initialize and register HCI device */
|
|
hdev = hci_alloc_dev();
|
|
if (!hdev) {
|
|
BT_ERR("Can't allocate HCI device");
|
|
goto done;
|
|
}
|
|
|
|
data->hdev = hdev;
|
|
|
|
hdev->bus = HCI_USB;
|
|
hci_set_drvdata(hdev, data);
|
|
SET_HCIDEV_DEV(hdev, &intf->dev);
|
|
|
|
hdev->open = bfusb_open;
|
|
hdev->close = bfusb_close;
|
|
hdev->flush = bfusb_flush;
|
|
hdev->send = bfusb_send_frame;
|
|
|
|
set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
|
|
|
|
if (hci_register_dev(hdev) < 0) {
|
|
BT_ERR("Can't register HCI device");
|
|
hci_free_dev(hdev);
|
|
goto done;
|
|
}
|
|
|
|
usb_set_intfdata(intf, data);
|
|
|
|
return 0;
|
|
|
|
release:
|
|
release_firmware(firmware);
|
|
|
|
done:
|
|
return -EIO;
|
|
}
|
|
|
|
static void bfusb_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct bfusb_data *data = usb_get_intfdata(intf);
|
|
struct hci_dev *hdev = data->hdev;
|
|
|
|
BT_DBG("intf %p", intf);
|
|
|
|
if (!hdev)
|
|
return;
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
|
|
bfusb_close(hdev);
|
|
|
|
hci_unregister_dev(hdev);
|
|
hci_free_dev(hdev);
|
|
}
|
|
|
|
static struct usb_driver bfusb_driver = {
|
|
.name = "bfusb",
|
|
.probe = bfusb_probe,
|
|
.disconnect = bfusb_disconnect,
|
|
.id_table = bfusb_table,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
module_usb_driver(bfusb_driver);
|
|
|
|
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
|
|
MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
|
|
MODULE_VERSION(VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_FIRMWARE("bfubase.frm");
|