1 // SPDX-License-Identifier: GPL-2.0 2 /* Parts of this driver are based on the following: 3 * - Kvaser linux leaf driver (version 4.78) 4 * - CAN driver for esd CAN-USB/2 5 * - Kvaser linux usbcanII driver (version 5.3) 6 * - Kvaser linux mhydra driver (version 5.24) 7 * 8 * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. 9 * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh 10 * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> 11 * Copyright (C) 2015 Valeo S.A. 12 */ 13 14 #include <linux/completion.h> 15 #include <linux/device.h> 16 #include <linux/gfp.h> 17 #include <linux/if.h> 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/netdevice.h> 21 #include <linux/spinlock.h> 22 #include <linux/types.h> 23 #include <linux/usb.h> 24 25 #include <linux/can.h> 26 #include <linux/can/dev.h> 27 #include <linux/can/error.h> 28 #include <linux/can/netlink.h> 29 30 #include "kvaser_usb.h" 31 32 /* Kvaser USB vendor id. */ 33 #define KVASER_VENDOR_ID 0x0bfd 34 35 /* Kvaser Leaf USB devices product ids */ 36 #define USB_LEAF_DEVEL_PRODUCT_ID 10 37 #define USB_LEAF_LITE_PRODUCT_ID 11 38 #define USB_LEAF_PRO_PRODUCT_ID 12 39 #define USB_LEAF_SPRO_PRODUCT_ID 14 40 #define USB_LEAF_PRO_LS_PRODUCT_ID 15 41 #define USB_LEAF_PRO_SWC_PRODUCT_ID 16 42 #define USB_LEAF_PRO_LIN_PRODUCT_ID 17 43 #define USB_LEAF_SPRO_LS_PRODUCT_ID 18 44 #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19 45 #define USB_MEMO2_DEVEL_PRODUCT_ID 22 46 #define USB_MEMO2_HSHS_PRODUCT_ID 23 47 #define USB_UPRO_HSHS_PRODUCT_ID 24 48 #define USB_LEAF_LITE_GI_PRODUCT_ID 25 49 #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26 50 #define USB_MEMO2_HSLS_PRODUCT_ID 27 51 #define USB_LEAF_LITE_CH_PRODUCT_ID 28 52 #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29 53 #define USB_OEM_MERCURY_PRODUCT_ID 34 54 #define USB_OEM_LEAF_PRODUCT_ID 35 55 #define USB_CAN_R_PRODUCT_ID 39 56 #define USB_LEAF_LITE_V2_PRODUCT_ID 288 57 #define USB_MINI_PCIE_HS_PRODUCT_ID 289 58 #define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290 59 #define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291 60 #define USB_MINI_PCIE_2HS_PRODUCT_ID 292 61 #define USB_USBCAN_R_V2_PRODUCT_ID 294 62 #define USB_LEAF_LIGHT_R_V2_PRODUCT_ID 295 63 #define USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID 296 64 #define USB_LEAF_PRODUCT_ID_END \ 65 USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID 66 67 /* Kvaser USBCan-II devices product ids */ 68 #define USB_USBCAN_REVB_PRODUCT_ID 2 69 #define USB_VCI2_PRODUCT_ID 3 70 #define USB_USBCAN2_PRODUCT_ID 4 71 #define USB_MEMORATOR_PRODUCT_ID 5 72 73 /* Kvaser Minihydra USB devices product ids */ 74 #define USB_BLACKBIRD_V2_PRODUCT_ID 258 75 #define USB_MEMO_PRO_5HS_PRODUCT_ID 260 76 #define USB_USBCAN_PRO_5HS_PRODUCT_ID 261 77 #define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262 78 #define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263 79 #define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264 80 #define USB_MEMO_2HS_PRODUCT_ID 265 81 #define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266 82 #define USB_HYBRID_2CANLIN_PRODUCT_ID 267 83 #define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268 84 #define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269 85 #define USB_HYBRID_PRO_2CANLIN_PRODUCT_ID 270 86 #define USB_U100_PRODUCT_ID 273 87 #define USB_U100P_PRODUCT_ID 274 88 #define USB_U100S_PRODUCT_ID 275 89 #define USB_USBCAN_PRO_4HS_PRODUCT_ID 276 90 #define USB_HYBRID_CANLIN_PRODUCT_ID 277 91 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 278 92 #define USB_HYDRA_PRODUCT_ID_END \ 93 USB_HYBRID_PRO_CANLIN_PRODUCT_ID 94 95 static inline bool kvaser_is_leaf(const struct usb_device_id *id) 96 { 97 return (id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID && 98 id->idProduct <= USB_CAN_R_PRODUCT_ID) || 99 (id->idProduct >= USB_LEAF_LITE_V2_PRODUCT_ID && 100 id->idProduct <= USB_LEAF_PRODUCT_ID_END); 101 } 102 103 static inline bool kvaser_is_usbcan(const struct usb_device_id *id) 104 { 105 return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID && 106 id->idProduct <= USB_MEMORATOR_PRODUCT_ID; 107 } 108 109 static inline bool kvaser_is_hydra(const struct usb_device_id *id) 110 { 111 return id->idProduct >= USB_BLACKBIRD_V2_PRODUCT_ID && 112 id->idProduct <= USB_HYDRA_PRODUCT_ID_END; 113 } 114 115 static const struct usb_device_id kvaser_usb_table[] = { 116 /* Leaf USB product IDs */ 117 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) }, 118 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) }, 119 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), 120 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 121 KVASER_USB_HAS_SILENT_MODE }, 122 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), 123 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 124 KVASER_USB_HAS_SILENT_MODE }, 125 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), 126 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 127 KVASER_USB_HAS_SILENT_MODE }, 128 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), 129 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 130 KVASER_USB_HAS_SILENT_MODE }, 131 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), 132 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 133 KVASER_USB_HAS_SILENT_MODE }, 134 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), 135 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 136 KVASER_USB_HAS_SILENT_MODE }, 137 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), 138 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 139 KVASER_USB_HAS_SILENT_MODE }, 140 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), 141 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 142 KVASER_USB_HAS_SILENT_MODE }, 143 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), 144 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 145 KVASER_USB_HAS_SILENT_MODE }, 146 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), 147 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 148 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) }, 149 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), 150 .driver_info = KVASER_USB_HAS_TXRX_ERRORS | 151 KVASER_USB_HAS_SILENT_MODE }, 152 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), 153 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 154 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), 155 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 156 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), 157 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 158 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), 159 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 160 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), 161 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 162 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), 163 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 164 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) }, 165 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) }, 166 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) }, 167 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) }, 168 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) }, 169 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID) }, 170 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID) }, 171 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID) }, 172 173 /* USBCANII USB product IDs */ 174 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), 175 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 176 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), 177 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 178 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), 179 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 180 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), 181 .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, 182 183 /* Minihydra USB product IDs */ 184 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID) }, 185 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID) }, 186 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID) }, 187 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID) }, 188 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID) }, 189 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID) }, 190 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID) }, 191 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID) }, 192 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID) }, 193 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID) }, 194 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID) }, 195 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID) }, 196 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID) }, 197 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID) }, 198 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID) }, 199 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID) }, 200 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID) }, 201 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID) }, 202 { } 203 }; 204 MODULE_DEVICE_TABLE(usb, kvaser_usb_table); 205 206 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len) 207 { 208 int actual_len; /* Not used */ 209 210 return usb_bulk_msg(dev->udev, 211 usb_sndbulkpipe(dev->udev, 212 dev->bulk_out->bEndpointAddress), 213 cmd, len, &actual_len, KVASER_USB_TIMEOUT); 214 } 215 216 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, 217 int *actual_len) 218 { 219 return usb_bulk_msg(dev->udev, 220 usb_rcvbulkpipe(dev->udev, 221 dev->bulk_in->bEndpointAddress), 222 cmd, len, actual_len, KVASER_USB_TIMEOUT); 223 } 224 225 static void kvaser_usb_send_cmd_callback(struct urb *urb) 226 { 227 struct net_device *netdev = urb->context; 228 229 kfree(urb->transfer_buffer); 230 231 if (urb->status) 232 netdev_warn(netdev, "urb status received: %d\n", urb->status); 233 } 234 235 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, 236 int len) 237 { 238 struct kvaser_usb *dev = priv->dev; 239 struct net_device *netdev = priv->netdev; 240 struct urb *urb; 241 int err; 242 243 urb = usb_alloc_urb(0, GFP_ATOMIC); 244 if (!urb) 245 return -ENOMEM; 246 247 usb_fill_bulk_urb(urb, dev->udev, 248 usb_sndbulkpipe(dev->udev, 249 dev->bulk_out->bEndpointAddress), 250 cmd, len, kvaser_usb_send_cmd_callback, netdev); 251 usb_anchor_urb(urb, &priv->tx_submitted); 252 253 err = usb_submit_urb(urb, GFP_ATOMIC); 254 if (err) { 255 netdev_err(netdev, "Error transmitting URB\n"); 256 usb_unanchor_urb(urb); 257 } 258 usb_free_urb(urb); 259 260 return 0; 261 } 262 263 int kvaser_usb_can_rx_over_error(struct net_device *netdev) 264 { 265 struct net_device_stats *stats = &netdev->stats; 266 struct can_frame *cf; 267 struct sk_buff *skb; 268 269 stats->rx_over_errors++; 270 stats->rx_errors++; 271 272 skb = alloc_can_err_skb(netdev, &cf); 273 if (!skb) { 274 stats->rx_dropped++; 275 netdev_warn(netdev, "No memory left for err_skb\n"); 276 return -ENOMEM; 277 } 278 279 cf->can_id |= CAN_ERR_CRTL; 280 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; 281 282 stats->rx_packets++; 283 stats->rx_bytes += cf->len; 284 netif_rx(skb); 285 286 return 0; 287 } 288 289 static void kvaser_usb_read_bulk_callback(struct urb *urb) 290 { 291 struct kvaser_usb *dev = urb->context; 292 int err; 293 unsigned int i; 294 295 switch (urb->status) { 296 case 0: 297 break; 298 case -ENOENT: 299 case -EPIPE: 300 case -EPROTO: 301 case -ESHUTDOWN: 302 return; 303 default: 304 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status); 305 goto resubmit_urb; 306 } 307 308 dev->ops->dev_read_bulk_callback(dev, urb->transfer_buffer, 309 urb->actual_length); 310 311 resubmit_urb: 312 usb_fill_bulk_urb(urb, dev->udev, 313 usb_rcvbulkpipe(dev->udev, 314 dev->bulk_in->bEndpointAddress), 315 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE, 316 kvaser_usb_read_bulk_callback, dev); 317 318 err = usb_submit_urb(urb, GFP_ATOMIC); 319 if (err == -ENODEV) { 320 for (i = 0; i < dev->nchannels; i++) { 321 if (!dev->nets[i]) 322 continue; 323 324 netif_device_detach(dev->nets[i]->netdev); 325 } 326 } else if (err) { 327 dev_err(&dev->intf->dev, 328 "Failed resubmitting read bulk urb: %d\n", err); 329 } 330 } 331 332 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) 333 { 334 int i, err = 0; 335 336 if (dev->rxinitdone) 337 return 0; 338 339 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) { 340 struct urb *urb = NULL; 341 u8 *buf = NULL; 342 dma_addr_t buf_dma; 343 344 urb = usb_alloc_urb(0, GFP_KERNEL); 345 if (!urb) { 346 err = -ENOMEM; 347 break; 348 } 349 350 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, 351 GFP_KERNEL, &buf_dma); 352 if (!buf) { 353 dev_warn(&dev->intf->dev, 354 "No memory left for USB buffer\n"); 355 usb_free_urb(urb); 356 err = -ENOMEM; 357 break; 358 } 359 360 usb_fill_bulk_urb(urb, dev->udev, 361 usb_rcvbulkpipe 362 (dev->udev, 363 dev->bulk_in->bEndpointAddress), 364 buf, KVASER_USB_RX_BUFFER_SIZE, 365 kvaser_usb_read_bulk_callback, dev); 366 urb->transfer_dma = buf_dma; 367 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 368 usb_anchor_urb(urb, &dev->rx_submitted); 369 370 err = usb_submit_urb(urb, GFP_KERNEL); 371 if (err) { 372 usb_unanchor_urb(urb); 373 usb_free_coherent(dev->udev, 374 KVASER_USB_RX_BUFFER_SIZE, buf, 375 buf_dma); 376 usb_free_urb(urb); 377 break; 378 } 379 380 dev->rxbuf[i] = buf; 381 dev->rxbuf_dma[i] = buf_dma; 382 383 usb_free_urb(urb); 384 } 385 386 if (i == 0) { 387 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n", 388 err); 389 return err; 390 } else if (i < KVASER_USB_MAX_RX_URBS) { 391 dev_warn(&dev->intf->dev, "RX performances may be slow\n"); 392 } 393 394 dev->rxinitdone = true; 395 396 return 0; 397 } 398 399 static int kvaser_usb_open(struct net_device *netdev) 400 { 401 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 402 struct kvaser_usb *dev = priv->dev; 403 int err; 404 405 err = open_candev(netdev); 406 if (err) 407 return err; 408 409 err = kvaser_usb_setup_rx_urbs(dev); 410 if (err) 411 goto error; 412 413 err = dev->ops->dev_set_opt_mode(priv); 414 if (err) 415 goto error; 416 417 err = dev->ops->dev_start_chip(priv); 418 if (err) { 419 netdev_warn(netdev, "Cannot start device, error %d\n", err); 420 goto error; 421 } 422 423 priv->can.state = CAN_STATE_ERROR_ACTIVE; 424 425 return 0; 426 427 error: 428 close_candev(netdev); 429 return err; 430 } 431 432 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) 433 { 434 int i, max_tx_urbs; 435 436 max_tx_urbs = priv->dev->max_tx_urbs; 437 438 priv->active_tx_contexts = 0; 439 for (i = 0; i < max_tx_urbs; i++) 440 priv->tx_contexts[i].echo_index = max_tx_urbs; 441 } 442 443 /* This method might sleep. Do not call it in the atomic context 444 * of URB completions. 445 */ 446 static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) 447 { 448 usb_kill_anchored_urbs(&priv->tx_submitted); 449 kvaser_usb_reset_tx_urb_contexts(priv); 450 } 451 452 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) 453 { 454 int i; 455 456 usb_kill_anchored_urbs(&dev->rx_submitted); 457 458 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) 459 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, 460 dev->rxbuf[i], dev->rxbuf_dma[i]); 461 462 for (i = 0; i < dev->nchannels; i++) { 463 struct kvaser_usb_net_priv *priv = dev->nets[i]; 464 465 if (priv) 466 kvaser_usb_unlink_tx_urbs(priv); 467 } 468 } 469 470 static int kvaser_usb_close(struct net_device *netdev) 471 { 472 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 473 struct kvaser_usb *dev = priv->dev; 474 int err; 475 476 netif_stop_queue(netdev); 477 478 err = dev->ops->dev_flush_queue(priv); 479 if (err) 480 netdev_warn(netdev, "Cannot flush queue, error %d\n", err); 481 482 if (dev->ops->dev_reset_chip) { 483 err = dev->ops->dev_reset_chip(dev, priv->channel); 484 if (err) 485 netdev_warn(netdev, "Cannot reset card, error %d\n", 486 err); 487 } 488 489 err = dev->ops->dev_stop_chip(priv); 490 if (err) 491 netdev_warn(netdev, "Cannot stop device, error %d\n", err); 492 493 /* reset tx contexts */ 494 kvaser_usb_unlink_tx_urbs(priv); 495 496 priv->can.state = CAN_STATE_STOPPED; 497 close_candev(priv->netdev); 498 499 return 0; 500 } 501 502 static void kvaser_usb_write_bulk_callback(struct urb *urb) 503 { 504 struct kvaser_usb_tx_urb_context *context = urb->context; 505 struct kvaser_usb_net_priv *priv; 506 struct net_device *netdev; 507 508 if (WARN_ON(!context)) 509 return; 510 511 priv = context->priv; 512 netdev = priv->netdev; 513 514 kfree(urb->transfer_buffer); 515 516 if (!netif_device_present(netdev)) 517 return; 518 519 if (urb->status) 520 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); 521 } 522 523 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, 524 struct net_device *netdev) 525 { 526 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 527 struct kvaser_usb *dev = priv->dev; 528 struct net_device_stats *stats = &netdev->stats; 529 struct kvaser_usb_tx_urb_context *context = NULL; 530 struct urb *urb; 531 void *buf; 532 int cmd_len = 0; 533 int err, ret = NETDEV_TX_OK; 534 unsigned int i; 535 unsigned long flags; 536 537 if (can_dropped_invalid_skb(netdev, skb)) 538 return NETDEV_TX_OK; 539 540 urb = usb_alloc_urb(0, GFP_ATOMIC); 541 if (!urb) { 542 stats->tx_dropped++; 543 dev_kfree_skb(skb); 544 return NETDEV_TX_OK; 545 } 546 547 spin_lock_irqsave(&priv->tx_contexts_lock, flags); 548 for (i = 0; i < dev->max_tx_urbs; i++) { 549 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) { 550 context = &priv->tx_contexts[i]; 551 552 context->echo_index = i; 553 ++priv->active_tx_contexts; 554 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs) 555 netif_stop_queue(netdev); 556 557 break; 558 } 559 } 560 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); 561 562 /* This should never happen; it implies a flow control bug */ 563 if (!context) { 564 netdev_warn(netdev, "cannot find free context\n"); 565 566 ret = NETDEV_TX_BUSY; 567 goto freeurb; 568 } 569 570 buf = dev->ops->dev_frame_to_cmd(priv, skb, &context->dlc, &cmd_len, 571 context->echo_index); 572 if (!buf) { 573 stats->tx_dropped++; 574 dev_kfree_skb(skb); 575 spin_lock_irqsave(&priv->tx_contexts_lock, flags); 576 577 context->echo_index = dev->max_tx_urbs; 578 --priv->active_tx_contexts; 579 netif_wake_queue(netdev); 580 581 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); 582 goto freeurb; 583 } 584 585 context->priv = priv; 586 587 can_put_echo_skb(skb, netdev, context->echo_index, 0); 588 589 usb_fill_bulk_urb(urb, dev->udev, 590 usb_sndbulkpipe(dev->udev, 591 dev->bulk_out->bEndpointAddress), 592 buf, cmd_len, kvaser_usb_write_bulk_callback, 593 context); 594 usb_anchor_urb(urb, &priv->tx_submitted); 595 596 err = usb_submit_urb(urb, GFP_ATOMIC); 597 if (unlikely(err)) { 598 spin_lock_irqsave(&priv->tx_contexts_lock, flags); 599 600 can_free_echo_skb(netdev, context->echo_index, NULL); 601 context->echo_index = dev->max_tx_urbs; 602 --priv->active_tx_contexts; 603 netif_wake_queue(netdev); 604 605 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); 606 607 usb_unanchor_urb(urb); 608 kfree(buf); 609 610 stats->tx_dropped++; 611 612 if (err == -ENODEV) 613 netif_device_detach(netdev); 614 else 615 netdev_warn(netdev, "Failed tx_urb %d\n", err); 616 617 goto freeurb; 618 } 619 620 ret = NETDEV_TX_OK; 621 622 freeurb: 623 usb_free_urb(urb); 624 return ret; 625 } 626 627 static const struct net_device_ops kvaser_usb_netdev_ops = { 628 .ndo_open = kvaser_usb_open, 629 .ndo_stop = kvaser_usb_close, 630 .ndo_start_xmit = kvaser_usb_start_xmit, 631 .ndo_change_mtu = can_change_mtu, 632 }; 633 634 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) 635 { 636 int i; 637 638 for (i = 0; i < dev->nchannels; i++) { 639 if (!dev->nets[i]) 640 continue; 641 642 unregister_candev(dev->nets[i]->netdev); 643 } 644 645 kvaser_usb_unlink_all_urbs(dev); 646 647 for (i = 0; i < dev->nchannels; i++) { 648 if (!dev->nets[i]) 649 continue; 650 651 free_candev(dev->nets[i]->netdev); 652 } 653 } 654 655 static int kvaser_usb_init_one(struct kvaser_usb *dev, 656 const struct usb_device_id *id, int channel) 657 { 658 struct net_device *netdev; 659 struct kvaser_usb_net_priv *priv; 660 int err; 661 662 if (dev->ops->dev_reset_chip) { 663 err = dev->ops->dev_reset_chip(dev, channel); 664 if (err) 665 return err; 666 } 667 668 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs), 669 dev->max_tx_urbs); 670 if (!netdev) { 671 dev_err(&dev->intf->dev, "Cannot alloc candev\n"); 672 return -ENOMEM; 673 } 674 675 priv = netdev_priv(netdev); 676 677 init_usb_anchor(&priv->tx_submitted); 678 init_completion(&priv->start_comp); 679 init_completion(&priv->stop_comp); 680 priv->can.ctrlmode_supported = 0; 681 682 priv->dev = dev; 683 priv->netdev = netdev; 684 priv->channel = channel; 685 686 spin_lock_init(&priv->tx_contexts_lock); 687 kvaser_usb_reset_tx_urb_contexts(priv); 688 689 priv->can.state = CAN_STATE_STOPPED; 690 priv->can.clock.freq = dev->cfg->clock.freq; 691 priv->can.bittiming_const = dev->cfg->bittiming_const; 692 priv->can.do_set_bittiming = dev->ops->dev_set_bittiming; 693 priv->can.do_set_mode = dev->ops->dev_set_mode; 694 if ((id->driver_info & KVASER_USB_HAS_TXRX_ERRORS) || 695 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP)) 696 priv->can.do_get_berr_counter = dev->ops->dev_get_berr_counter; 697 if (id->driver_info & KVASER_USB_HAS_SILENT_MODE) 698 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; 699 700 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported; 701 702 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) { 703 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const; 704 priv->can.do_set_data_bittiming = 705 dev->ops->dev_set_data_bittiming; 706 } 707 708 netdev->flags |= IFF_ECHO; 709 710 netdev->netdev_ops = &kvaser_usb_netdev_ops; 711 712 SET_NETDEV_DEV(netdev, &dev->intf->dev); 713 netdev->dev_id = channel; 714 715 dev->nets[channel] = priv; 716 717 err = register_candev(netdev); 718 if (err) { 719 dev_err(&dev->intf->dev, "Failed to register CAN device\n"); 720 free_candev(netdev); 721 dev->nets[channel] = NULL; 722 return err; 723 } 724 725 netdev_dbg(netdev, "device registered\n"); 726 727 return 0; 728 } 729 730 static int kvaser_usb_probe(struct usb_interface *intf, 731 const struct usb_device_id *id) 732 { 733 struct kvaser_usb *dev; 734 int err; 735 int i; 736 737 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); 738 if (!dev) 739 return -ENOMEM; 740 741 if (kvaser_is_leaf(id)) { 742 dev->card_data.leaf.family = KVASER_LEAF; 743 dev->ops = &kvaser_usb_leaf_dev_ops; 744 } else if (kvaser_is_usbcan(id)) { 745 dev->card_data.leaf.family = KVASER_USBCAN; 746 dev->ops = &kvaser_usb_leaf_dev_ops; 747 } else if (kvaser_is_hydra(id)) { 748 dev->ops = &kvaser_usb_hydra_dev_ops; 749 } else { 750 dev_err(&intf->dev, 751 "Product ID (%d) is not a supported Kvaser USB device\n", 752 id->idProduct); 753 return -ENODEV; 754 } 755 756 dev->intf = intf; 757 758 err = dev->ops->dev_setup_endpoints(dev); 759 if (err) { 760 dev_err(&intf->dev, "Cannot get usb endpoint(s)"); 761 return err; 762 } 763 764 dev->udev = interface_to_usbdev(intf); 765 766 init_usb_anchor(&dev->rx_submitted); 767 768 usb_set_intfdata(intf, dev); 769 770 dev->card_data.ctrlmode_supported = 0; 771 dev->card_data.capabilities = 0; 772 err = dev->ops->dev_init_card(dev); 773 if (err) { 774 dev_err(&intf->dev, 775 "Failed to initialize card, error %d\n", err); 776 return err; 777 } 778 779 err = dev->ops->dev_get_software_info(dev); 780 if (err) { 781 dev_err(&intf->dev, 782 "Cannot get software info, error %d\n", err); 783 return err; 784 } 785 786 if (dev->ops->dev_get_software_details) { 787 err = dev->ops->dev_get_software_details(dev); 788 if (err) { 789 dev_err(&intf->dev, 790 "Cannot get software details, error %d\n", err); 791 return err; 792 } 793 } 794 795 if (WARN_ON(!dev->cfg)) 796 return -ENODEV; 797 798 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", 799 ((dev->fw_version >> 24) & 0xff), 800 ((dev->fw_version >> 16) & 0xff), 801 (dev->fw_version & 0xffff)); 802 803 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs); 804 805 err = dev->ops->dev_get_card_info(dev); 806 if (err) { 807 dev_err(&intf->dev, "Cannot get card info, error %d\n", err); 808 return err; 809 } 810 811 if (dev->ops->dev_get_capabilities) { 812 err = dev->ops->dev_get_capabilities(dev); 813 if (err) { 814 dev_err(&intf->dev, 815 "Cannot get capabilities, error %d\n", err); 816 kvaser_usb_remove_interfaces(dev); 817 return err; 818 } 819 } 820 821 for (i = 0; i < dev->nchannels; i++) { 822 err = kvaser_usb_init_one(dev, id, i); 823 if (err) { 824 kvaser_usb_remove_interfaces(dev); 825 return err; 826 } 827 } 828 829 return 0; 830 } 831 832 static void kvaser_usb_disconnect(struct usb_interface *intf) 833 { 834 struct kvaser_usb *dev = usb_get_intfdata(intf); 835 836 usb_set_intfdata(intf, NULL); 837 838 if (!dev) 839 return; 840 841 kvaser_usb_remove_interfaces(dev); 842 } 843 844 static struct usb_driver kvaser_usb_driver = { 845 .name = "kvaser_usb", 846 .probe = kvaser_usb_probe, 847 .disconnect = kvaser_usb_disconnect, 848 .id_table = kvaser_usb_table, 849 }; 850 851 module_usb_driver(kvaser_usb_driver); 852 853 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); 854 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>"); 855 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); 856 MODULE_LICENSE("GPL v2"); 857