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722 lines
15 KiB
722 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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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_dev_err(data->hdev, "bulk tx submit failed urb %p err %d", |
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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_dev_err(data->hdev, "bulk rx submit failed urb %p err %d", |
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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_dev_err(data->hdev, "error in block"); |
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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_dev_err(data->hdev, "unexpected start block"); |
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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_dev_err(data->hdev, "no packet type found"); |
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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_dev_err(data->hdev, "event block is too short"); |
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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_dev_err(data->hdev, "data block is too short"); |
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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_dev_err(data->hdev, "audio block is too short"); |
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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_dev_err(data->hdev, "no memory for the packet"); |
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return -ENOMEM; |
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} |
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hci_skb_pkt_type(skb) = 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_dev_err(data->hdev, "unexpected continuation block"); |
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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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skb_put_data(data->reassembly, 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_dev_err(data->hdev, "block extends over URB buffer ranges"); |
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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_dev_err(data->hdev, "bulk resubmit failed urb %p err %d", |
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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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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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} |
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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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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, |
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hci_skb_pkt_type(skb), skb->len); |
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switch (hci_skb_pkt_type(skb)) { |
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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), &hci_skb_pkt_type(skb), 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_KERNEL); |
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if (!nskb) { |
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bt_dev_err(hdev, "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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skb_put_data(nskb, 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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skb_put_data(nskb, 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) |
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{ |
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unsigned char *buf; |
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int err, pipe, len, size, sent = 0; |
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BT_DBG("bfusb %p udev %p", data, data->udev); |
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BT_INFO("BlueFRITZ! USB loading firmware"); |
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buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL); |
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if (!buf) { |
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BT_ERR("Can't allocate memory chunk for firmware"); |
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return -ENOMEM; |
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} |
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pipe = usb_sndctrlpipe(data->udev, 0); |
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if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION, |
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0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) { |
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BT_ERR("Can't change to loading configuration"); |
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kfree(buf); |
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return -EBUSY; |
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} |
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data->udev->toggle[0] = data->udev->toggle[1] = 0; |
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pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep); |
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while (count) { |
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size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3); |
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memcpy(buf, firmware + sent, size); |
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err = usb_bulk_msg(data->udev, pipe, buf, size, |
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&len, BFUSB_BLOCK_TIMEOUT); |
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if (err || (len != size)) { |
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BT_ERR("Error in firmware loading"); |
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goto error; |
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} |
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sent += size; |
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count -= size; |
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} |
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err = usb_bulk_msg(data->udev, pipe, NULL, 0, |
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&len, BFUSB_BLOCK_TIMEOUT); |
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if (err < 0) { |
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BT_ERR("Error in null packet request"); |
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goto error; |
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} |
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pipe = usb_sndctrlpipe(data->udev, 0); |
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err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION, |
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0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); |
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if (err < 0) { |
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BT_ERR("Can't change to running configuration"); |
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goto error; |
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} |
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data->udev->toggle[0] = data->udev->toggle[1] = 0; |
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BT_INFO("BlueFRITZ! USB device ready"); |
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kfree(buf); |
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return 0; |
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error: |
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kfree(buf); |
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pipe = usb_sndctrlpipe(data->udev, 0); |
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usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION, |
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0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); |
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return err; |
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} |
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static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id) |
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{ |
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const struct firmware *firmware; |
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struct usb_device *udev = interface_to_usbdev(intf); |
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struct usb_host_endpoint *bulk_out_ep; |
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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) |
|
return -ENOMEM; |
|
|
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION); |
|
MODULE_VERSION(VERSION); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_FIRMWARE("bfubase.frm");
|
|
|