![Marcel Holtmann](/assets/img/avatar_default.png)
This patch adds the endian annotations to the Bluetooth core. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
657 lines
14 KiB
C
657 lines
14 KiB
C
/*
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*
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* Digianswer Bluetooth USB driver
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*
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* Copyright (C) 2004-2005 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/config.h>
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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/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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#ifndef CONFIG_BT_HCIBPA10X_DEBUG
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#undef BT_DBG
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#define BT_DBG(D...)
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#endif
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#define VERSION "0.8"
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static int ignore = 0;
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static 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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#define BPA10X_CMD_EP 0x00
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#define BPA10X_EVT_EP 0x81
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#define BPA10X_TX_EP 0x02
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#define BPA10X_RX_EP 0x82
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#define BPA10X_CMD_BUF_SIZE 252
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#define BPA10X_EVT_BUF_SIZE 16
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#define BPA10X_TX_BUF_SIZE 384
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#define BPA10X_RX_BUF_SIZE 384
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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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rwlock_t lock;
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struct sk_buff_head cmd_queue;
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struct urb *cmd_urb;
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struct urb *evt_urb;
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struct sk_buff *evt_skb;
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unsigned int evt_len;
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struct sk_buff_head tx_queue;
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struct urb *tx_urb;
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struct urb *rx_urb;
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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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} __attribute__ ((packed));
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static void bpa10x_recv_bulk(struct bpa10x_data *data, unsigned char *buf, int count)
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{
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struct hci_acl_hdr *ah;
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struct hci_sco_hdr *sh;
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struct hci_vendor_hdr *vh;
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struct sk_buff *skb;
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int len;
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while (count) {
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switch (*buf++) {
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case HCI_ACLDATA_PKT:
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ah = (struct hci_acl_hdr *) buf;
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len = HCI_ACL_HDR_SIZE + __le16_to_cpu(ah->dlen);
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skb = bt_skb_alloc(len, GFP_ATOMIC);
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if (skb) {
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memcpy(skb_put(skb, len), buf, len);
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skb->dev = (void *) data->hdev;
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bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
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hci_recv_frame(skb);
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}
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break;
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case HCI_SCODATA_PKT:
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sh = (struct hci_sco_hdr *) buf;
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len = HCI_SCO_HDR_SIZE + sh->dlen;
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skb = bt_skb_alloc(len, GFP_ATOMIC);
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if (skb) {
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memcpy(skb_put(skb, len), buf, len);
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skb->dev = (void *) data->hdev;
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bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
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hci_recv_frame(skb);
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}
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break;
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case HCI_VENDOR_PKT:
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vh = (struct hci_vendor_hdr *) buf;
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len = HCI_VENDOR_HDR_SIZE + __le16_to_cpu(vh->dlen);
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skb = bt_skb_alloc(len, GFP_ATOMIC);
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if (skb) {
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memcpy(skb_put(skb, len), buf, len);
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skb->dev = (void *) data->hdev;
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bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
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hci_recv_frame(skb);
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}
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break;
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default:
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len = count - 1;
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break;
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}
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buf += len;
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count -= (len + 1);
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}
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}
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static int bpa10x_recv_event(struct bpa10x_data *data, unsigned char *buf, int size)
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{
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BT_DBG("data %p buf %p size %d", data, buf, size);
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if (data->evt_skb) {
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struct sk_buff *skb = data->evt_skb;
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memcpy(skb_put(skb, size), buf, size);
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if (skb->len == data->evt_len) {
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data->evt_skb = NULL;
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data->evt_len = 0;
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hci_recv_frame(skb);
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}
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} else {
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struct sk_buff *skb;
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struct hci_event_hdr *hdr;
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unsigned char pkt_type;
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int pkt_len = 0;
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if (size < HCI_EVENT_HDR_SIZE + 1) {
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BT_ERR("%s event packet block with size %d is too short",
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data->hdev->name, size);
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return -EILSEQ;
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}
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pkt_type = *buf++;
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size--;
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if (pkt_type != HCI_EVENT_PKT) {
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BT_ERR("%s unexpected event packet start byte 0x%02x",
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data->hdev->name, pkt_type);
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return -EPROTO;
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}
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hdr = (struct hci_event_hdr *) buf;
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pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
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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 new event packet",
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data->hdev->name);
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return -ENOMEM;
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}
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skb->dev = (void *) data->hdev;
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bt_cb(skb)->pkt_type = pkt_type;
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memcpy(skb_put(skb, size), buf, size);
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if (pkt_len == size) {
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hci_recv_frame(skb);
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} else {
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data->evt_skb = skb;
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data->evt_len = pkt_len;
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}
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}
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return 0;
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}
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static void bpa10x_wakeup(struct bpa10x_data *data)
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{
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struct urb *urb;
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struct sk_buff *skb;
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int err;
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BT_DBG("data %p", data);
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urb = data->cmd_urb;
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if (urb->status == -EINPROGRESS)
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skb = NULL;
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else
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skb = skb_dequeue(&data->cmd_queue);
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if (skb) {
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struct usb_ctrlrequest *cr;
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if (skb->len > BPA10X_CMD_BUF_SIZE) {
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BT_ERR("%s command packet with size %d is too big",
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data->hdev->name, skb->len);
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kfree_skb(skb);
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return;
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}
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cr = (struct usb_ctrlrequest *) urb->setup_packet;
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cr->wLength = __cpu_to_le16(skb->len);
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memcpy(urb->transfer_buffer, skb->data, skb->len);
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urb->transfer_buffer_length = skb->len;
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0 && err != -ENODEV) {
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BT_ERR("%s submit failed for command urb %p with error %d",
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data->hdev->name, urb, err);
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skb_queue_head(&data->cmd_queue, skb);
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} else
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kfree_skb(skb);
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}
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urb = data->tx_urb;
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if (urb->status == -EINPROGRESS)
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skb = NULL;
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else
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skb = skb_dequeue(&data->tx_queue);
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if (skb) {
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memcpy(urb->transfer_buffer, skb->data, skb->len);
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urb->transfer_buffer_length = skb->len;
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0 && err != -ENODEV) {
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BT_ERR("%s submit failed for command urb %p with error %d",
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data->hdev->name, urb, err);
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skb_queue_head(&data->tx_queue, skb);
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} else
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kfree_skb(skb);
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}
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}
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static void bpa10x_complete(struct urb *urb, struct pt_regs *regs)
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{
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struct bpa10x_data *data = urb->context;
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unsigned char *buf = urb->transfer_buffer;
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int err, count = urb->actual_length;
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BT_DBG("data %p urb %p buf %p count %d", data, urb, buf, count);
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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 < 0 || !count)
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goto resubmit;
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if (usb_pipein(urb->pipe)) {
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data->hdev->stat.byte_rx += count;
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if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
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bpa10x_recv_event(data, buf, count);
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if (usb_pipetype(urb->pipe) == PIPE_BULK)
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bpa10x_recv_bulk(data, buf, count);
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} else {
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data->hdev->stat.byte_tx += count;
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bpa10x_wakeup(data);
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}
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resubmit:
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if (usb_pipein(urb->pipe)) {
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0 && err != -ENODEV) {
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BT_ERR("%s urb %p type %d resubmit status %d",
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data->hdev->name, urb, usb_pipetype(urb->pipe), err);
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}
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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 inline struct urb *bpa10x_alloc_urb(struct usb_device *udev, unsigned int pipe,
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size_t size, gfp_t flags, void *data)
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{
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struct urb *urb;
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struct usb_ctrlrequest *cr;
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unsigned char *buf;
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BT_DBG("udev %p data %p", udev, data);
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urb = usb_alloc_urb(0, flags);
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if (!urb)
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return NULL;
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buf = kmalloc(size, flags);
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if (!buf) {
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usb_free_urb(urb);
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return NULL;
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}
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switch (usb_pipetype(pipe)) {
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case PIPE_CONTROL:
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cr = kmalloc(sizeof(*cr), flags);
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if (!cr) {
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kfree(buf);
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usb_free_urb(urb);
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return NULL;
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}
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cr->bRequestType = USB_TYPE_VENDOR;
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cr->bRequest = 0;
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cr->wIndex = 0;
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cr->wValue = 0;
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cr->wLength = __cpu_to_le16(0);
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usb_fill_control_urb(urb, udev, pipe, (void *) cr, buf, 0, bpa10x_complete, data);
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break;
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case PIPE_INTERRUPT:
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usb_fill_int_urb(urb, udev, pipe, buf, size, bpa10x_complete, data, 1);
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break;
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case PIPE_BULK:
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usb_fill_bulk_urb(urb, udev, pipe, buf, size, bpa10x_complete, data);
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break;
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default:
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kfree(buf);
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usb_free_urb(urb);
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return NULL;
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}
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return urb;
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}
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static inline void bpa10x_free_urb(struct urb *urb)
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{
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BT_DBG("urb %p", urb);
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if (!urb)
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return;
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kfree(urb->setup_packet);
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kfree(urb->transfer_buffer);
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usb_free_urb(urb);
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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 = hdev->driver_data;
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struct usb_device *udev = data->udev;
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unsigned long flags;
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int err;
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BT_DBG("hdev %p data %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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data->cmd_urb = bpa10x_alloc_urb(udev, usb_sndctrlpipe(udev, BPA10X_CMD_EP),
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BPA10X_CMD_BUF_SIZE, GFP_KERNEL, data);
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if (!data->cmd_urb) {
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err = -ENOMEM;
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goto done;
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}
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data->evt_urb = bpa10x_alloc_urb(udev, usb_rcvintpipe(udev, BPA10X_EVT_EP),
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BPA10X_EVT_BUF_SIZE, GFP_KERNEL, data);
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if (!data->evt_urb) {
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bpa10x_free_urb(data->cmd_urb);
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err = -ENOMEM;
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goto done;
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}
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data->rx_urb = bpa10x_alloc_urb(udev, usb_rcvbulkpipe(udev, BPA10X_RX_EP),
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BPA10X_RX_BUF_SIZE, GFP_KERNEL, data);
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if (!data->rx_urb) {
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bpa10x_free_urb(data->evt_urb);
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bpa10x_free_urb(data->cmd_urb);
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err = -ENOMEM;
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goto done;
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}
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data->tx_urb = bpa10x_alloc_urb(udev, usb_sndbulkpipe(udev, BPA10X_TX_EP),
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BPA10X_TX_BUF_SIZE, GFP_KERNEL, data);
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if (!data->rx_urb) {
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bpa10x_free_urb(data->rx_urb);
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bpa10x_free_urb(data->evt_urb);
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bpa10x_free_urb(data->cmd_urb);
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err = -ENOMEM;
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goto done;
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}
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write_lock_irqsave(&data->lock, flags);
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err = usb_submit_urb(data->evt_urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s submit failed for event urb %p with error %d",
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data->hdev->name, data->evt_urb, err);
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} else {
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err = usb_submit_urb(data->rx_urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s submit failed for rx urb %p with error %d",
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data->hdev->name, data->evt_urb, err);
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usb_kill_urb(data->evt_urb);
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}
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}
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write_unlock_irqrestore(&data->lock, flags);
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done:
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if (err < 0)
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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 = hdev->driver_data;
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unsigned long flags;
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BT_DBG("hdev %p data %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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skb_queue_purge(&data->cmd_queue);
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usb_kill_urb(data->cmd_urb);
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usb_kill_urb(data->evt_urb);
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usb_kill_urb(data->rx_urb);
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usb_kill_urb(data->tx_urb);
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write_unlock_irqrestore(&data->lock, flags);
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bpa10x_free_urb(data->cmd_urb);
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bpa10x_free_urb(data->evt_urb);
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bpa10x_free_urb(data->rx_urb);
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bpa10x_free_urb(data->tx_urb);
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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 = hdev->driver_data;
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BT_DBG("hdev %p data %p", hdev, data);
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skb_queue_purge(&data->cmd_queue);
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return 0;
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}
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static int bpa10x_send_frame(struct sk_buff *skb)
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{
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struct hci_dev *hdev = (struct hci_dev *) skb->dev;
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struct bpa10x_data *data;
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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 (!hdev) {
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BT_ERR("Frame for unknown HCI device");
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return -ENODEV;
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}
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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data = hdev->driver_data;
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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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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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skb_queue_tail(&data->cmd_queue, skb);
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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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skb_queue_tail(&data->tx_queue, skb);
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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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skb_queue_tail(&data->tx_queue, skb);
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break;
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};
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|
read_lock(&data->lock);
|
|
|
|
bpa10x_wakeup(data);
|
|
|
|
read_unlock(&data->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bpa10x_destruct(struct hci_dev *hdev)
|
|
{
|
|
struct bpa10x_data *data = hdev->driver_data;
|
|
|
|
BT_DBG("hdev %p data %p", hdev, data);
|
|
|
|
kfree(data);
|
|
}
|
|
|
|
static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct hci_dev *hdev;
|
|
struct bpa10x_data *data;
|
|
int err;
|
|
|
|
BT_DBG("intf %p id %p", intf, id);
|
|
|
|
if (ignore)
|
|
return -ENODEV;
|
|
|
|
if (intf->cur_altsetting->desc.bInterfaceNumber > 0)
|
|
return -ENODEV;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data) {
|
|
BT_ERR("Can't allocate data structure");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
data->udev = udev;
|
|
|
|
rwlock_init(&data->lock);
|
|
|
|
skb_queue_head_init(&data->cmd_queue);
|
|
skb_queue_head_init(&data->tx_queue);
|
|
|
|
hdev = hci_alloc_dev();
|
|
if (!hdev) {
|
|
BT_ERR("Can't allocate HCI device");
|
|
kfree(data);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
data->hdev = hdev;
|
|
|
|
hdev->type = HCI_USB;
|
|
hdev->driver_data = data;
|
|
SET_HCIDEV_DEV(hdev, &intf->dev);
|
|
|
|
hdev->open = bpa10x_open;
|
|
hdev->close = bpa10x_close;
|
|
hdev->flush = bpa10x_flush;
|
|
hdev->send = bpa10x_send_frame;
|
|
hdev->destruct = bpa10x_destruct;
|
|
|
|
hdev->owner = THIS_MODULE;
|
|
|
|
err = hci_register_dev(hdev);
|
|
if (err < 0) {
|
|
BT_ERR("Can't register HCI device");
|
|
kfree(data);
|
|
hci_free_dev(hdev);
|
|
return err;
|
|
}
|
|
|
|
usb_set_intfdata(intf, data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bpa10x_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct bpa10x_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);
|
|
|
|
if (hci_unregister_dev(hdev) < 0)
|
|
BT_ERR("Can't unregister HCI device %s", hdev->name);
|
|
|
|
hci_free_dev(hdev);
|
|
}
|
|
|
|
static struct usb_driver bpa10x_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "bpa10x",
|
|
.probe = bpa10x_probe,
|
|
.disconnect = bpa10x_disconnect,
|
|
.id_table = bpa10x_table,
|
|
};
|
|
|
|
static int __init bpa10x_init(void)
|
|
{
|
|
int err;
|
|
|
|
BT_INFO("Digianswer Bluetooth USB driver ver %s", VERSION);
|
|
|
|
err = usb_register(&bpa10x_driver);
|
|
if (err < 0)
|
|
BT_ERR("Failed to register USB driver");
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit bpa10x_exit(void)
|
|
{
|
|
usb_deregister(&bpa10x_driver);
|
|
}
|
|
|
|
module_init(bpa10x_init);
|
|
module_exit(bpa10x_exit);
|
|
|
|
module_param(ignore, bool, 0644);
|
|
MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
|
|
|
|
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
|
|
MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
|
|
MODULE_VERSION(VERSION);
|
|
MODULE_LICENSE("GPL");
|