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 "hci_uart.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_ERR("%s corrupted event packet", hdev->name); 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_ERR("%s urb %p failed to resubmit (%d)", 131 hdev->name, urb, -err); 132 usb_unanchor_urb(urb); 133 } 134 } 135 136 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev) 137 { 138 struct bpa10x_data *data = hci_get_drvdata(hdev); 139 struct urb *urb; 140 unsigned char *buf; 141 unsigned int pipe; 142 int err, size = 16; 143 144 BT_DBG("%s", hdev->name); 145 146 urb = usb_alloc_urb(0, GFP_KERNEL); 147 if (!urb) 148 return -ENOMEM; 149 150 buf = kmalloc(size, GFP_KERNEL); 151 if (!buf) { 152 usb_free_urb(urb); 153 return -ENOMEM; 154 } 155 156 pipe = usb_rcvintpipe(data->udev, 0x81); 157 158 usb_fill_int_urb(urb, data->udev, pipe, buf, size, 159 bpa10x_rx_complete, hdev, 1); 160 161 urb->transfer_flags |= URB_FREE_BUFFER; 162 163 usb_anchor_urb(urb, &data->rx_anchor); 164 165 err = usb_submit_urb(urb, GFP_KERNEL); 166 if (err < 0) { 167 BT_ERR("%s urb %p submission failed (%d)", 168 hdev->name, urb, -err); 169 usb_unanchor_urb(urb); 170 } 171 172 usb_free_urb(urb); 173 174 return err; 175 } 176 177 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev) 178 { 179 struct bpa10x_data *data = hci_get_drvdata(hdev); 180 struct urb *urb; 181 unsigned char *buf; 182 unsigned int pipe; 183 int err, size = 64; 184 185 BT_DBG("%s", hdev->name); 186 187 urb = usb_alloc_urb(0, GFP_KERNEL); 188 if (!urb) 189 return -ENOMEM; 190 191 buf = kmalloc(size, GFP_KERNEL); 192 if (!buf) { 193 usb_free_urb(urb); 194 return -ENOMEM; 195 } 196 197 pipe = usb_rcvbulkpipe(data->udev, 0x82); 198 199 usb_fill_bulk_urb(urb, data->udev, pipe, 200 buf, size, bpa10x_rx_complete, hdev); 201 202 urb->transfer_flags |= URB_FREE_BUFFER; 203 204 usb_anchor_urb(urb, &data->rx_anchor); 205 206 err = usb_submit_urb(urb, GFP_KERNEL); 207 if (err < 0) { 208 BT_ERR("%s urb %p submission failed (%d)", 209 hdev->name, urb, -err); 210 usb_unanchor_urb(urb); 211 } 212 213 usb_free_urb(urb); 214 215 return err; 216 } 217 218 static int bpa10x_open(struct hci_dev *hdev) 219 { 220 struct bpa10x_data *data = hci_get_drvdata(hdev); 221 int err; 222 223 BT_DBG("%s", hdev->name); 224 225 err = bpa10x_submit_intr_urb(hdev); 226 if (err < 0) 227 goto error; 228 229 err = bpa10x_submit_bulk_urb(hdev); 230 if (err < 0) 231 goto error; 232 233 return 0; 234 235 error: 236 usb_kill_anchored_urbs(&data->rx_anchor); 237 238 return err; 239 } 240 241 static int bpa10x_close(struct hci_dev *hdev) 242 { 243 struct bpa10x_data *data = hci_get_drvdata(hdev); 244 245 BT_DBG("%s", hdev->name); 246 247 usb_kill_anchored_urbs(&data->rx_anchor); 248 249 return 0; 250 } 251 252 static int bpa10x_flush(struct hci_dev *hdev) 253 { 254 struct bpa10x_data *data = hci_get_drvdata(hdev); 255 256 BT_DBG("%s", hdev->name); 257 258 usb_kill_anchored_urbs(&data->tx_anchor); 259 260 return 0; 261 } 262 263 static int bpa10x_setup(struct hci_dev *hdev) 264 { 265 const u8 req[] = { 0x07 }; 266 struct sk_buff *skb; 267 268 BT_DBG("%s", hdev->name); 269 270 /* Read revision string */ 271 skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT); 272 if (IS_ERR(skb)) 273 return PTR_ERR(skb); 274 275 BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1)); 276 277 kfree_skb(skb); 278 return 0; 279 } 280 281 static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 282 { 283 struct bpa10x_data *data = hci_get_drvdata(hdev); 284 struct usb_ctrlrequest *dr; 285 struct urb *urb; 286 unsigned int pipe; 287 int err; 288 289 BT_DBG("%s", hdev->name); 290 291 skb->dev = (void *) hdev; 292 293 urb = usb_alloc_urb(0, GFP_ATOMIC); 294 if (!urb) 295 return -ENOMEM; 296 297 /* Prepend skb with frame type */ 298 *skb_push(skb, 1) = hci_skb_pkt_type(skb); 299 300 switch (hci_skb_pkt_type(skb)) { 301 case HCI_COMMAND_PKT: 302 dr = kmalloc(sizeof(*dr), GFP_ATOMIC); 303 if (!dr) { 304 usb_free_urb(urb); 305 return -ENOMEM; 306 } 307 308 dr->bRequestType = USB_TYPE_VENDOR; 309 dr->bRequest = 0; 310 dr->wIndex = 0; 311 dr->wValue = 0; 312 dr->wLength = __cpu_to_le16(skb->len); 313 314 pipe = usb_sndctrlpipe(data->udev, 0x00); 315 316 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr, 317 skb->data, skb->len, bpa10x_tx_complete, skb); 318 319 hdev->stat.cmd_tx++; 320 break; 321 322 case HCI_ACLDATA_PKT: 323 pipe = usb_sndbulkpipe(data->udev, 0x02); 324 325 usb_fill_bulk_urb(urb, data->udev, pipe, 326 skb->data, skb->len, bpa10x_tx_complete, skb); 327 328 hdev->stat.acl_tx++; 329 break; 330 331 case HCI_SCODATA_PKT: 332 pipe = usb_sndbulkpipe(data->udev, 0x02); 333 334 usb_fill_bulk_urb(urb, data->udev, pipe, 335 skb->data, skb->len, bpa10x_tx_complete, skb); 336 337 hdev->stat.sco_tx++; 338 break; 339 340 default: 341 usb_free_urb(urb); 342 return -EILSEQ; 343 } 344 345 usb_anchor_urb(urb, &data->tx_anchor); 346 347 err = usb_submit_urb(urb, GFP_ATOMIC); 348 if (err < 0) { 349 BT_ERR("%s urb %p submission failed", hdev->name, urb); 350 kfree(urb->setup_packet); 351 usb_unanchor_urb(urb); 352 } 353 354 usb_free_urb(urb); 355 356 return 0; 357 } 358 359 static int bpa10x_set_diag(struct hci_dev *hdev, bool enable) 360 { 361 const u8 req[] = { 0x00, enable }; 362 struct sk_buff *skb; 363 364 BT_DBG("%s", hdev->name); 365 366 if (!test_bit(HCI_RUNNING, &hdev->flags)) 367 return -ENETDOWN; 368 369 /* Enable sniffer operation */ 370 skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT); 371 if (IS_ERR(skb)) 372 return PTR_ERR(skb); 373 374 kfree_skb(skb); 375 return 0; 376 } 377 378 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id) 379 { 380 struct bpa10x_data *data; 381 struct hci_dev *hdev; 382 int err; 383 384 BT_DBG("intf %p id %p", intf, id); 385 386 if (intf->cur_altsetting->desc.bInterfaceNumber != 0) 387 return -ENODEV; 388 389 data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL); 390 if (!data) 391 return -ENOMEM; 392 393 data->udev = interface_to_usbdev(intf); 394 395 init_usb_anchor(&data->tx_anchor); 396 init_usb_anchor(&data->rx_anchor); 397 398 hdev = hci_alloc_dev(); 399 if (!hdev) 400 return -ENOMEM; 401 402 hdev->bus = HCI_USB; 403 hci_set_drvdata(hdev, data); 404 405 data->hdev = hdev; 406 407 SET_HCIDEV_DEV(hdev, &intf->dev); 408 409 hdev->open = bpa10x_open; 410 hdev->close = bpa10x_close; 411 hdev->flush = bpa10x_flush; 412 hdev->setup = bpa10x_setup; 413 hdev->send = bpa10x_send_frame; 414 hdev->set_diag = bpa10x_set_diag; 415 416 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); 417 418 err = hci_register_dev(hdev); 419 if (err < 0) { 420 hci_free_dev(hdev); 421 return err; 422 } 423 424 usb_set_intfdata(intf, data); 425 426 return 0; 427 } 428 429 static void bpa10x_disconnect(struct usb_interface *intf) 430 { 431 struct bpa10x_data *data = usb_get_intfdata(intf); 432 433 BT_DBG("intf %p", intf); 434 435 if (!data) 436 return; 437 438 usb_set_intfdata(intf, NULL); 439 440 hci_unregister_dev(data->hdev); 441 442 hci_free_dev(data->hdev); 443 kfree_skb(data->rx_skb[0]); 444 kfree_skb(data->rx_skb[1]); 445 } 446 447 static struct usb_driver bpa10x_driver = { 448 .name = "bpa10x", 449 .probe = bpa10x_probe, 450 .disconnect = bpa10x_disconnect, 451 .id_table = bpa10x_table, 452 .disable_hub_initiated_lpm = 1, 453 }; 454 455 module_usb_driver(bpa10x_driver); 456 457 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 458 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION); 459 MODULE_VERSION(VERSION); 460 MODULE_LICENSE("GPL"); 461