1 /* 2 * 3 * Digianswer Bluetooth USB driver 4 * 5 * Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org> 6 * 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/kernel.h> 25 #include <linux/module.h> 26 #include <linux/init.h> 27 #include <linux/slab.h> 28 #include <linux/types.h> 29 #include <linux/sched.h> 30 #include <linux/errno.h> 31 #include <linux/skbuff.h> 32 33 #include <linux/usb.h> 34 35 #include <net/bluetooth/bluetooth.h> 36 #include <net/bluetooth/hci_core.h> 37 38 #include "h4_recv.h" 39 40 #define VERSION "0.11" 41 42 static const struct usb_device_id bpa10x_table[] = { 43 /* Tektronix BPA 100/105 (Digianswer) */ 44 { USB_DEVICE(0x08fd, 0x0002) }, 45 46 { } /* Terminating entry */ 47 }; 48 49 MODULE_DEVICE_TABLE(usb, bpa10x_table); 50 51 struct bpa10x_data { 52 struct hci_dev *hdev; 53 struct usb_device *udev; 54 55 struct usb_anchor tx_anchor; 56 struct usb_anchor rx_anchor; 57 58 struct sk_buff *rx_skb[2]; 59 }; 60 61 static void bpa10x_tx_complete(struct urb *urb) 62 { 63 struct sk_buff *skb = urb->context; 64 struct hci_dev *hdev = (struct hci_dev *) skb->dev; 65 66 BT_DBG("%s urb %p status %d count %d", hdev->name, 67 urb, urb->status, urb->actual_length); 68 69 if (!test_bit(HCI_RUNNING, &hdev->flags)) 70 goto done; 71 72 if (!urb->status) 73 hdev->stat.byte_tx += urb->transfer_buffer_length; 74 else 75 hdev->stat.err_tx++; 76 77 done: 78 kfree(urb->setup_packet); 79 80 kfree_skb(skb); 81 } 82 83 #define HCI_VENDOR_HDR_SIZE 5 84 85 #define HCI_RECV_VENDOR \ 86 .type = HCI_VENDOR_PKT, \ 87 .hlen = HCI_VENDOR_HDR_SIZE, \ 88 .loff = 3, \ 89 .lsize = 2, \ 90 .maxlen = HCI_MAX_FRAME_SIZE 91 92 static const struct h4_recv_pkt bpa10x_recv_pkts[] = { 93 { H4_RECV_ACL, .recv = hci_recv_frame }, 94 { H4_RECV_SCO, .recv = hci_recv_frame }, 95 { H4_RECV_EVENT, .recv = hci_recv_frame }, 96 { HCI_RECV_VENDOR, .recv = hci_recv_diag }, 97 }; 98 99 static void bpa10x_rx_complete(struct urb *urb) 100 { 101 struct hci_dev *hdev = urb->context; 102 struct bpa10x_data *data = hci_get_drvdata(hdev); 103 int err; 104 105 BT_DBG("%s urb %p status %d count %d", hdev->name, 106 urb, urb->status, urb->actual_length); 107 108 if (!test_bit(HCI_RUNNING, &hdev->flags)) 109 return; 110 111 if (urb->status == 0) { 112 bool idx = usb_pipebulk(urb->pipe); 113 114 data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx], 115 urb->transfer_buffer, 116 urb->actual_length, 117 bpa10x_recv_pkts, 118 ARRAY_SIZE(bpa10x_recv_pkts)); 119 if (IS_ERR(data->rx_skb[idx])) { 120 bt_dev_err(hdev, "corrupted event packet"); 121 hdev->stat.err_rx++; 122 data->rx_skb[idx] = NULL; 123 } 124 } 125 126 usb_anchor_urb(urb, &data->rx_anchor); 127 128 err = usb_submit_urb(urb, GFP_ATOMIC); 129 if (err < 0) { 130 bt_dev_err(hdev, "urb %p failed to resubmit (%d)", urb, -err); 131 usb_unanchor_urb(urb); 132 } 133 } 134 135 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev) 136 { 137 struct bpa10x_data *data = hci_get_drvdata(hdev); 138 struct urb *urb; 139 unsigned char *buf; 140 unsigned int pipe; 141 int err, size = 16; 142 143 BT_DBG("%s", hdev->name); 144 145 urb = usb_alloc_urb(0, GFP_KERNEL); 146 if (!urb) 147 return -ENOMEM; 148 149 buf = kmalloc(size, GFP_KERNEL); 150 if (!buf) { 151 usb_free_urb(urb); 152 return -ENOMEM; 153 } 154 155 pipe = usb_rcvintpipe(data->udev, 0x81); 156 157 usb_fill_int_urb(urb, data->udev, pipe, buf, size, 158 bpa10x_rx_complete, hdev, 1); 159 160 urb->transfer_flags |= URB_FREE_BUFFER; 161 162 usb_anchor_urb(urb, &data->rx_anchor); 163 164 err = usb_submit_urb(urb, GFP_KERNEL); 165 if (err < 0) { 166 bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err); 167 usb_unanchor_urb(urb); 168 } 169 170 usb_free_urb(urb); 171 172 return err; 173 } 174 175 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev) 176 { 177 struct bpa10x_data *data = hci_get_drvdata(hdev); 178 struct urb *urb; 179 unsigned char *buf; 180 unsigned int pipe; 181 int err, size = 64; 182 183 BT_DBG("%s", hdev->name); 184 185 urb = usb_alloc_urb(0, GFP_KERNEL); 186 if (!urb) 187 return -ENOMEM; 188 189 buf = kmalloc(size, GFP_KERNEL); 190 if (!buf) { 191 usb_free_urb(urb); 192 return -ENOMEM; 193 } 194 195 pipe = usb_rcvbulkpipe(data->udev, 0x82); 196 197 usb_fill_bulk_urb(urb, data->udev, pipe, 198 buf, size, bpa10x_rx_complete, hdev); 199 200 urb->transfer_flags |= URB_FREE_BUFFER; 201 202 usb_anchor_urb(urb, &data->rx_anchor); 203 204 err = usb_submit_urb(urb, GFP_KERNEL); 205 if (err < 0) { 206 bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err); 207 usb_unanchor_urb(urb); 208 } 209 210 usb_free_urb(urb); 211 212 return err; 213 } 214 215 static int bpa10x_open(struct hci_dev *hdev) 216 { 217 struct bpa10x_data *data = hci_get_drvdata(hdev); 218 int err; 219 220 BT_DBG("%s", hdev->name); 221 222 err = bpa10x_submit_intr_urb(hdev); 223 if (err < 0) 224 goto error; 225 226 err = bpa10x_submit_bulk_urb(hdev); 227 if (err < 0) 228 goto error; 229 230 return 0; 231 232 error: 233 usb_kill_anchored_urbs(&data->rx_anchor); 234 235 return err; 236 } 237 238 static int bpa10x_close(struct hci_dev *hdev) 239 { 240 struct bpa10x_data *data = hci_get_drvdata(hdev); 241 242 BT_DBG("%s", hdev->name); 243 244 usb_kill_anchored_urbs(&data->rx_anchor); 245 246 return 0; 247 } 248 249 static int bpa10x_flush(struct hci_dev *hdev) 250 { 251 struct bpa10x_data *data = hci_get_drvdata(hdev); 252 253 BT_DBG("%s", hdev->name); 254 255 usb_kill_anchored_urbs(&data->tx_anchor); 256 257 return 0; 258 } 259 260 static int bpa10x_setup(struct hci_dev *hdev) 261 { 262 static const u8 req[] = { 0x07 }; 263 struct sk_buff *skb; 264 265 BT_DBG("%s", hdev->name); 266 267 /* Read revision string */ 268 skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT); 269 if (IS_ERR(skb)) 270 return PTR_ERR(skb); 271 272 bt_dev_info(hdev, "%s", (char *)(skb->data + 1)); 273 274 hci_set_fw_info(hdev, "%s", skb->data + 1); 275 276 kfree_skb(skb); 277 return 0; 278 } 279 280 static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 281 { 282 struct bpa10x_data *data = hci_get_drvdata(hdev); 283 struct usb_ctrlrequest *dr; 284 struct urb *urb; 285 unsigned int pipe; 286 int err; 287 288 BT_DBG("%s", hdev->name); 289 290 skb->dev = (void *) hdev; 291 292 urb = usb_alloc_urb(0, GFP_ATOMIC); 293 if (!urb) 294 return -ENOMEM; 295 296 /* Prepend skb with frame type */ 297 *(u8 *)skb_push(skb, 1) = hci_skb_pkt_type(skb); 298 299 switch (hci_skb_pkt_type(skb)) { 300 case HCI_COMMAND_PKT: 301 dr = kmalloc(sizeof(*dr), GFP_ATOMIC); 302 if (!dr) { 303 usb_free_urb(urb); 304 return -ENOMEM; 305 } 306 307 dr->bRequestType = USB_TYPE_VENDOR; 308 dr->bRequest = 0; 309 dr->wIndex = 0; 310 dr->wValue = 0; 311 dr->wLength = __cpu_to_le16(skb->len); 312 313 pipe = usb_sndctrlpipe(data->udev, 0x00); 314 315 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr, 316 skb->data, skb->len, bpa10x_tx_complete, skb); 317 318 hdev->stat.cmd_tx++; 319 break; 320 321 case HCI_ACLDATA_PKT: 322 pipe = usb_sndbulkpipe(data->udev, 0x02); 323 324 usb_fill_bulk_urb(urb, data->udev, pipe, 325 skb->data, skb->len, bpa10x_tx_complete, skb); 326 327 hdev->stat.acl_tx++; 328 break; 329 330 case HCI_SCODATA_PKT: 331 pipe = usb_sndbulkpipe(data->udev, 0x02); 332 333 usb_fill_bulk_urb(urb, data->udev, pipe, 334 skb->data, skb->len, bpa10x_tx_complete, skb); 335 336 hdev->stat.sco_tx++; 337 break; 338 339 default: 340 usb_free_urb(urb); 341 return -EILSEQ; 342 } 343 344 usb_anchor_urb(urb, &data->tx_anchor); 345 346 err = usb_submit_urb(urb, GFP_ATOMIC); 347 if (err < 0) { 348 bt_dev_err(hdev, "urb %p submission failed", urb); 349 kfree(urb->setup_packet); 350 usb_unanchor_urb(urb); 351 } 352 353 usb_free_urb(urb); 354 355 return 0; 356 } 357 358 static int bpa10x_set_diag(struct hci_dev *hdev, bool enable) 359 { 360 const u8 req[] = { 0x00, enable }; 361 struct sk_buff *skb; 362 363 BT_DBG("%s", hdev->name); 364 365 if (!test_bit(HCI_RUNNING, &hdev->flags)) 366 return -ENETDOWN; 367 368 /* Enable sniffer operation */ 369 skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT); 370 if (IS_ERR(skb)) 371 return PTR_ERR(skb); 372 373 kfree_skb(skb); 374 return 0; 375 } 376 377 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id) 378 { 379 struct bpa10x_data *data; 380 struct hci_dev *hdev; 381 int err; 382 383 BT_DBG("intf %p id %p", intf, id); 384 385 if (intf->cur_altsetting->desc.bInterfaceNumber != 0) 386 return -ENODEV; 387 388 data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL); 389 if (!data) 390 return -ENOMEM; 391 392 data->udev = interface_to_usbdev(intf); 393 394 init_usb_anchor(&data->tx_anchor); 395 init_usb_anchor(&data->rx_anchor); 396 397 hdev = hci_alloc_dev(); 398 if (!hdev) 399 return -ENOMEM; 400 401 hdev->bus = HCI_USB; 402 hci_set_drvdata(hdev, data); 403 404 data->hdev = hdev; 405 406 SET_HCIDEV_DEV(hdev, &intf->dev); 407 408 hdev->open = bpa10x_open; 409 hdev->close = bpa10x_close; 410 hdev->flush = bpa10x_flush; 411 hdev->setup = bpa10x_setup; 412 hdev->send = bpa10x_send_frame; 413 hdev->set_diag = bpa10x_set_diag; 414 415 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); 416 417 err = hci_register_dev(hdev); 418 if (err < 0) { 419 hci_free_dev(hdev); 420 return err; 421 } 422 423 usb_set_intfdata(intf, data); 424 425 return 0; 426 } 427 428 static void bpa10x_disconnect(struct usb_interface *intf) 429 { 430 struct bpa10x_data *data = usb_get_intfdata(intf); 431 432 BT_DBG("intf %p", intf); 433 434 if (!data) 435 return; 436 437 usb_set_intfdata(intf, NULL); 438 439 hci_unregister_dev(data->hdev); 440 441 hci_free_dev(data->hdev); 442 kfree_skb(data->rx_skb[0]); 443 kfree_skb(data->rx_skb[1]); 444 } 445 446 static struct usb_driver bpa10x_driver = { 447 .name = "bpa10x", 448 .probe = bpa10x_probe, 449 .disconnect = bpa10x_disconnect, 450 .id_table = bpa10x_table, 451 .disable_hub_initiated_lpm = 1, 452 }; 453 454 module_usb_driver(bpa10x_driver); 455 456 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 457 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION); 458 MODULE_VERSION(VERSION); 459 MODULE_LICENSE("GPL"); 460