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![Marcel Holtmann](/assets/img/avatar_default.png)
The bpa10x_table[] device table can be declared as const Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
514 lines
10 KiB
C
514 lines
10 KiB
C
/*
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*
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* Digianswer Bluetooth USB driver
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*
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* Copyright (C) 2004-2007 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/kernel.h>
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#include <linux/module.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/sched.h>
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#include <linux/errno.h>
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#include <linux/skbuff.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 "0.10"
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static const struct usb_device_id bpa10x_table[] = {
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/* Tektronix BPA 100/105 (Digianswer) */
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{ USB_DEVICE(0x08fd, 0x0002) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, bpa10x_table);
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struct bpa10x_data {
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struct hci_dev *hdev;
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struct usb_device *udev;
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struct usb_anchor tx_anchor;
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struct usb_anchor rx_anchor;
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struct sk_buff *rx_skb[2];
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};
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#define HCI_VENDOR_HDR_SIZE 5
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struct hci_vendor_hdr {
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__u8 type;
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__le16 snum;
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__le16 dlen;
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} __packed;
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static int bpa10x_recv(struct hci_dev *hdev, int queue, void *buf, int count)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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BT_DBG("%s queue %d buffer %p count %d", hdev->name,
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queue, buf, count);
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if (queue < 0 || queue > 1)
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return -EILSEQ;
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hdev->stat.byte_rx += count;
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while (count) {
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struct sk_buff *skb = data->rx_skb[queue];
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struct { __u8 type; int expect; } *scb;
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int type, len = 0;
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if (!skb) {
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/* Start of the frame */
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type = *((__u8 *) buf);
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count--; buf++;
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switch (type) {
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case HCI_EVENT_PKT:
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if (count >= HCI_EVENT_HDR_SIZE) {
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struct hci_event_hdr *h = buf;
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len = HCI_EVENT_HDR_SIZE + h->plen;
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} else
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return -EILSEQ;
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break;
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case HCI_ACLDATA_PKT:
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if (count >= HCI_ACL_HDR_SIZE) {
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struct hci_acl_hdr *h = buf;
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len = HCI_ACL_HDR_SIZE +
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__le16_to_cpu(h->dlen);
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} else
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return -EILSEQ;
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break;
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case HCI_SCODATA_PKT:
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if (count >= HCI_SCO_HDR_SIZE) {
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struct hci_sco_hdr *h = buf;
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len = HCI_SCO_HDR_SIZE + h->dlen;
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} else
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return -EILSEQ;
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break;
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case HCI_VENDOR_PKT:
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if (count >= HCI_VENDOR_HDR_SIZE) {
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struct hci_vendor_hdr *h = buf;
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len = HCI_VENDOR_HDR_SIZE +
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__le16_to_cpu(h->dlen);
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} else
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return -EILSEQ;
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break;
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}
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skb = bt_skb_alloc(len, GFP_ATOMIC);
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if (!skb) {
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BT_ERR("%s no memory for packet", hdev->name);
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return -ENOMEM;
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}
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data->rx_skb[queue] = skb;
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scb = (void *) skb->cb;
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scb->type = type;
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scb->expect = len;
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} else {
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/* Continuation */
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scb = (void *) skb->cb;
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len = scb->expect;
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}
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len = min(len, count);
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memcpy(skb_put(skb, len), buf, len);
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scb->expect -= len;
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if (scb->expect == 0) {
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/* Complete frame */
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data->rx_skb[queue] = NULL;
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bt_cb(skb)->pkt_type = scb->type;
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hci_recv_frame(hdev, skb);
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}
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count -= len; buf += len;
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}
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return 0;
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}
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static void bpa10x_tx_complete(struct urb *urb)
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{
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struct sk_buff *skb = urb->context;
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struct hci_dev *hdev = (struct hci_dev *) skb->dev;
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BT_DBG("%s urb %p status %d count %d", hdev->name,
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urb, urb->status, urb->actual_length);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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goto done;
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if (!urb->status)
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hdev->stat.byte_tx += urb->transfer_buffer_length;
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else
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hdev->stat.err_tx++;
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done:
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kfree(urb->setup_packet);
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kfree_skb(skb);
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}
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static void bpa10x_rx_complete(struct urb *urb)
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{
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struct hci_dev *hdev = urb->context;
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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int err;
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BT_DBG("%s urb %p status %d count %d", hdev->name,
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urb, urb->status, urb->actual_length);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return;
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if (urb->status == 0) {
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if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
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urb->transfer_buffer,
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urb->actual_length) < 0) {
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BT_ERR("%s corrupted event packet", hdev->name);
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hdev->stat.err_rx++;
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}
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}
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usb_anchor_urb(urb, &data->rx_anchor);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s urb %p failed to resubmit (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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}
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}
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static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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struct urb *urb;
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unsigned char *buf;
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unsigned int pipe;
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int err, size = 16;
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BT_DBG("%s", hdev->name);
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urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!urb)
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return -ENOMEM;
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buf = kmalloc(size, GFP_KERNEL);
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if (!buf) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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pipe = usb_rcvintpipe(data->udev, 0x81);
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usb_fill_int_urb(urb, data->udev, pipe, buf, size,
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bpa10x_rx_complete, hdev, 1);
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urb->transfer_flags |= URB_FREE_BUFFER;
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usb_anchor_urb(urb, &data->rx_anchor);
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err = usb_submit_urb(urb, GFP_KERNEL);
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if (err < 0) {
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BT_ERR("%s urb %p submission failed (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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}
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usb_free_urb(urb);
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return err;
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}
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static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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struct urb *urb;
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unsigned char *buf;
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unsigned int pipe;
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int err, size = 64;
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BT_DBG("%s", hdev->name);
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urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!urb)
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return -ENOMEM;
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buf = kmalloc(size, GFP_KERNEL);
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if (!buf) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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pipe = usb_rcvbulkpipe(data->udev, 0x82);
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usb_fill_bulk_urb(urb, data->udev, pipe,
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buf, size, bpa10x_rx_complete, hdev);
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urb->transfer_flags |= URB_FREE_BUFFER;
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usb_anchor_urb(urb, &data->rx_anchor);
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err = usb_submit_urb(urb, GFP_KERNEL);
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if (err < 0) {
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BT_ERR("%s urb %p submission failed (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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}
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usb_free_urb(urb);
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return err;
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}
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static int bpa10x_open(struct hci_dev *hdev)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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int err;
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BT_DBG("%s", hdev->name);
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if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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err = bpa10x_submit_intr_urb(hdev);
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if (err < 0)
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goto error;
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err = bpa10x_submit_bulk_urb(hdev);
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if (err < 0)
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goto error;
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return 0;
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error:
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usb_kill_anchored_urbs(&data->rx_anchor);
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clear_bit(HCI_RUNNING, &hdev->flags);
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return err;
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}
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static int bpa10x_close(struct hci_dev *hdev)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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BT_DBG("%s", hdev->name);
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if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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usb_kill_anchored_urbs(&data->rx_anchor);
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return 0;
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}
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static int bpa10x_flush(struct hci_dev *hdev)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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BT_DBG("%s", hdev->name);
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usb_kill_anchored_urbs(&data->tx_anchor);
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return 0;
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}
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static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct bpa10x_data *data = hci_get_drvdata(hdev);
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struct usb_ctrlrequest *dr;
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struct urb *urb;
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unsigned int pipe;
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int err;
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BT_DBG("%s", hdev->name);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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skb->dev = (void *) hdev;
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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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/* Prepend skb with frame type */
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*skb_push(skb, 1) = bt_cb(skb)->pkt_type;
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switch (bt_cb(skb)->pkt_type) {
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case HCI_COMMAND_PKT:
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dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
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if (!dr) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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dr->bRequestType = USB_TYPE_VENDOR;
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dr->bRequest = 0;
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dr->wIndex = 0;
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dr->wValue = 0;
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dr->wLength = __cpu_to_le16(skb->len);
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pipe = usb_sndctrlpipe(data->udev, 0x00);
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usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
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skb->data, skb->len, bpa10x_tx_complete, skb);
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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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pipe = usb_sndbulkpipe(data->udev, 0x02);
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usb_fill_bulk_urb(urb, data->udev, pipe,
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skb->data, skb->len, bpa10x_tx_complete, skb);
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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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pipe = usb_sndbulkpipe(data->udev, 0x02);
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usb_fill_bulk_urb(urb, data->udev, pipe,
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skb->data, skb->len, bpa10x_tx_complete, skb);
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hdev->stat.sco_tx++;
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break;
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default:
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usb_free_urb(urb);
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return -EILSEQ;
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}
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usb_anchor_urb(urb, &data->tx_anchor);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s urb %p submission failed", hdev->name, urb);
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kfree(urb->setup_packet);
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usb_unanchor_urb(urb);
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}
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usb_free_urb(urb);
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return 0;
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}
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static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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struct bpa10x_data *data;
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struct hci_dev *hdev;
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int err;
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BT_DBG("intf %p id %p", intf, id);
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if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
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return -ENODEV;
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data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->udev = interface_to_usbdev(intf);
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init_usb_anchor(&data->tx_anchor);
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init_usb_anchor(&data->rx_anchor);
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hdev = hci_alloc_dev();
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if (!hdev)
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return -ENOMEM;
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hdev->bus = HCI_USB;
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hci_set_drvdata(hdev, data);
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data->hdev = hdev;
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SET_HCIDEV_DEV(hdev, &intf->dev);
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hdev->open = bpa10x_open;
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hdev->close = bpa10x_close;
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hdev->flush = bpa10x_flush;
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hdev->send = bpa10x_send_frame;
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set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
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err = hci_register_dev(hdev);
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if (err < 0) {
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hci_free_dev(hdev);
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return err;
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}
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usb_set_intfdata(intf, data);
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return 0;
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}
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static void bpa10x_disconnect(struct usb_interface *intf)
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{
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struct bpa10x_data *data = usb_get_intfdata(intf);
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BT_DBG("intf %p", intf);
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if (!data)
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return;
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usb_set_intfdata(intf, NULL);
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hci_unregister_dev(data->hdev);
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hci_free_dev(data->hdev);
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kfree_skb(data->rx_skb[0]);
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kfree_skb(data->rx_skb[1]);
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}
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static struct usb_driver bpa10x_driver = {
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.name = "bpa10x",
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.probe = bpa10x_probe,
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.disconnect = bpa10x_disconnect,
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.id_table = bpa10x_table,
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.disable_hub_initiated_lpm = 1,
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};
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module_usb_driver(bpa10x_driver);
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MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
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MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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