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 65 /* Kvaser USBCan-II devices product ids */ 66 #define USB_USBCAN_REVB_PRODUCT_ID 2 67 #define USB_VCI2_PRODUCT_ID 3 68 #define USB_USBCAN2_PRODUCT_ID 4 69 #define USB_MEMORATOR_PRODUCT_ID 5 70 71 /* Kvaser Minihydra USB devices product ids */ 72 #define USB_BLACKBIRD_V2_PRODUCT_ID 258 73 #define USB_MEMO_PRO_5HS_PRODUCT_ID 260 74 #define USB_USBCAN_PRO_5HS_PRODUCT_ID 261 75 #define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262 76 #define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263 77 #define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264 78 #define USB_MEMO_2HS_PRODUCT_ID 265 79 #define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266 80 #define USB_HYBRID_2CANLIN_PRODUCT_ID 267 81 #define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268 82 #define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269 83 #define USB_HYBRID_PRO_2CANLIN_PRODUCT_ID 270 84 #define USB_U100_PRODUCT_ID 273 85 #define USB_U100P_PRODUCT_ID 274 86 #define USB_U100S_PRODUCT_ID 275 87 #define USB_USBCAN_PRO_4HS_PRODUCT_ID 276 88 #define USB_HYBRID_CANLIN_PRODUCT_ID 277 89 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 278 90 91 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_hydra = { 92 .quirks = 0, 93 .ops = &kvaser_usb_hydra_dev_ops, 94 }; 95 96 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_usbcan = { 97 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS | 98 KVASER_USB_QUIRK_HAS_SILENT_MODE, 99 .family = KVASER_USBCAN, 100 .ops = &kvaser_usb_leaf_dev_ops, 101 }; 102 103 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf = { 104 .quirks = KVASER_USB_QUIRK_IGNORE_CLK_FREQ, 105 .family = KVASER_LEAF, 106 .ops = &kvaser_usb_leaf_dev_ops, 107 }; 108 109 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err = { 110 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS | 111 KVASER_USB_QUIRK_IGNORE_CLK_FREQ, 112 .family = KVASER_LEAF, 113 .ops = &kvaser_usb_leaf_dev_ops, 114 }; 115 116 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err_listen = { 117 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS | 118 KVASER_USB_QUIRK_HAS_SILENT_MODE | 119 KVASER_USB_QUIRK_IGNORE_CLK_FREQ, 120 .family = KVASER_LEAF, 121 .ops = &kvaser_usb_leaf_dev_ops, 122 }; 123 124 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leafimx = { 125 .quirks = 0, 126 .ops = &kvaser_usb_leaf_dev_ops, 127 }; 128 129 static const struct usb_device_id kvaser_usb_table[] = { 130 /* Leaf M32C USB product IDs */ 131 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID), 132 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf }, 133 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID), 134 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf }, 135 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), 136 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 137 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), 138 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 139 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), 140 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 141 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), 142 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 143 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), 144 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 145 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), 146 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 147 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), 148 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 149 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), 150 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 151 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), 152 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 153 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), 154 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 155 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID), 156 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf }, 157 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), 158 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen }, 159 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), 160 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 161 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), 162 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 163 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), 164 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 165 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), 166 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 167 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), 168 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 169 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), 170 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err }, 171 172 /* Leaf i.MX28 USB product IDs */ 173 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID), 174 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 175 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID), 176 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 177 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID), 178 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 179 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID), 180 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 181 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID), 182 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 183 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID), 184 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 185 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID), 186 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 187 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID), 188 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx }, 189 190 /* USBCANII USB product IDs */ 191 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), 192 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan }, 193 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), 194 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan }, 195 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), 196 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan }, 197 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), 198 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan }, 199 200 /* Minihydra USB product IDs */ 201 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID), 202 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 203 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID), 204 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 205 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID), 206 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 207 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID), 208 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 209 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID), 210 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 211 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID), 212 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 213 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID), 214 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 215 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID), 216 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 217 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID), 218 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 219 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID), 220 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 221 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID), 222 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 223 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID), 224 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 225 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID), 226 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 227 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID), 228 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 229 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID), 230 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 231 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID), 232 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 233 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID), 234 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 235 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID), 236 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra }, 237 { } 238 }; 239 MODULE_DEVICE_TABLE(usb, kvaser_usb_table); 240 241 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len) 242 { 243 return usb_bulk_msg(dev->udev, 244 usb_sndbulkpipe(dev->udev, 245 dev->bulk_out->bEndpointAddress), 246 cmd, len, NULL, KVASER_USB_TIMEOUT); 247 } 248 249 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, 250 int *actual_len) 251 { 252 return usb_bulk_msg(dev->udev, 253 usb_rcvbulkpipe(dev->udev, 254 dev->bulk_in->bEndpointAddress), 255 cmd, len, actual_len, KVASER_USB_TIMEOUT); 256 } 257 258 static void kvaser_usb_send_cmd_callback(struct urb *urb) 259 { 260 struct net_device *netdev = urb->context; 261 262 kfree(urb->transfer_buffer); 263 264 if (urb->status) 265 netdev_warn(netdev, "urb status received: %d\n", urb->status); 266 } 267 268 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, 269 int len) 270 { 271 struct kvaser_usb *dev = priv->dev; 272 struct net_device *netdev = priv->netdev; 273 struct urb *urb; 274 int err; 275 276 urb = usb_alloc_urb(0, GFP_ATOMIC); 277 if (!urb) 278 return -ENOMEM; 279 280 usb_fill_bulk_urb(urb, dev->udev, 281 usb_sndbulkpipe(dev->udev, 282 dev->bulk_out->bEndpointAddress), 283 cmd, len, kvaser_usb_send_cmd_callback, netdev); 284 usb_anchor_urb(urb, &priv->tx_submitted); 285 286 err = usb_submit_urb(urb, GFP_ATOMIC); 287 if (err) { 288 netdev_err(netdev, "Error transmitting URB\n"); 289 usb_unanchor_urb(urb); 290 } 291 usb_free_urb(urb); 292 293 return 0; 294 } 295 296 int kvaser_usb_can_rx_over_error(struct net_device *netdev) 297 { 298 struct net_device_stats *stats = &netdev->stats; 299 struct can_frame *cf; 300 struct sk_buff *skb; 301 302 stats->rx_over_errors++; 303 stats->rx_errors++; 304 305 skb = alloc_can_err_skb(netdev, &cf); 306 if (!skb) { 307 stats->rx_dropped++; 308 netdev_warn(netdev, "No memory left for err_skb\n"); 309 return -ENOMEM; 310 } 311 312 cf->can_id |= CAN_ERR_CRTL; 313 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; 314 315 netif_rx(skb); 316 317 return 0; 318 } 319 320 static void kvaser_usb_read_bulk_callback(struct urb *urb) 321 { 322 struct kvaser_usb *dev = urb->context; 323 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops; 324 int err; 325 unsigned int i; 326 327 switch (urb->status) { 328 case 0: 329 break; 330 case -ENOENT: 331 case -EPIPE: 332 case -EPROTO: 333 case -ESHUTDOWN: 334 return; 335 default: 336 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status); 337 goto resubmit_urb; 338 } 339 340 ops->dev_read_bulk_callback(dev, urb->transfer_buffer, 341 urb->actual_length); 342 343 resubmit_urb: 344 usb_fill_bulk_urb(urb, dev->udev, 345 usb_rcvbulkpipe(dev->udev, 346 dev->bulk_in->bEndpointAddress), 347 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE, 348 kvaser_usb_read_bulk_callback, dev); 349 350 err = usb_submit_urb(urb, GFP_ATOMIC); 351 if (err == -ENODEV) { 352 for (i = 0; i < dev->nchannels; i++) { 353 if (!dev->nets[i]) 354 continue; 355 356 netif_device_detach(dev->nets[i]->netdev); 357 } 358 } else if (err) { 359 dev_err(&dev->intf->dev, 360 "Failed resubmitting read bulk urb: %d\n", err); 361 } 362 } 363 364 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) 365 { 366 int i, err = 0; 367 368 if (dev->rxinitdone) 369 return 0; 370 371 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) { 372 struct urb *urb = NULL; 373 u8 *buf = NULL; 374 dma_addr_t buf_dma; 375 376 urb = usb_alloc_urb(0, GFP_KERNEL); 377 if (!urb) { 378 err = -ENOMEM; 379 break; 380 } 381 382 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, 383 GFP_KERNEL, &buf_dma); 384 if (!buf) { 385 dev_warn(&dev->intf->dev, 386 "No memory left for USB buffer\n"); 387 usb_free_urb(urb); 388 err = -ENOMEM; 389 break; 390 } 391 392 usb_fill_bulk_urb(urb, dev->udev, 393 usb_rcvbulkpipe 394 (dev->udev, 395 dev->bulk_in->bEndpointAddress), 396 buf, KVASER_USB_RX_BUFFER_SIZE, 397 kvaser_usb_read_bulk_callback, dev); 398 urb->transfer_dma = buf_dma; 399 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 400 usb_anchor_urb(urb, &dev->rx_submitted); 401 402 err = usb_submit_urb(urb, GFP_KERNEL); 403 if (err) { 404 usb_unanchor_urb(urb); 405 usb_free_coherent(dev->udev, 406 KVASER_USB_RX_BUFFER_SIZE, buf, 407 buf_dma); 408 usb_free_urb(urb); 409 break; 410 } 411 412 dev->rxbuf[i] = buf; 413 dev->rxbuf_dma[i] = buf_dma; 414 415 usb_free_urb(urb); 416 } 417 418 if (i == 0) { 419 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n", 420 err); 421 return err; 422 } else if (i < KVASER_USB_MAX_RX_URBS) { 423 dev_warn(&dev->intf->dev, "RX performances may be slow\n"); 424 } 425 426 dev->rxinitdone = true; 427 428 return 0; 429 } 430 431 static int kvaser_usb_open(struct net_device *netdev) 432 { 433 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 434 struct kvaser_usb *dev = priv->dev; 435 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops; 436 int err; 437 438 err = open_candev(netdev); 439 if (err) 440 return err; 441 442 err = kvaser_usb_setup_rx_urbs(dev); 443 if (err) 444 goto error; 445 446 err = ops->dev_set_opt_mode(priv); 447 if (err) 448 goto error; 449 450 err = ops->dev_start_chip(priv); 451 if (err) { 452 netdev_warn(netdev, "Cannot start device, error %d\n", err); 453 goto error; 454 } 455 456 priv->can.state = CAN_STATE_ERROR_ACTIVE; 457 458 return 0; 459 460 error: 461 close_candev(netdev); 462 return err; 463 } 464 465 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) 466 { 467 int i, max_tx_urbs; 468 469 max_tx_urbs = priv->dev->max_tx_urbs; 470 471 priv->active_tx_contexts = 0; 472 for (i = 0; i < max_tx_urbs; i++) 473 priv->tx_contexts[i].echo_index = max_tx_urbs; 474 } 475 476 /* This method might sleep. Do not call it in the atomic context 477 * of URB completions. 478 */ 479 static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) 480 { 481 usb_kill_anchored_urbs(&priv->tx_submitted); 482 kvaser_usb_reset_tx_urb_contexts(priv); 483 } 484 485 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) 486 { 487 int i; 488 489 usb_kill_anchored_urbs(&dev->rx_submitted); 490 491 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) 492 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, 493 dev->rxbuf[i], dev->rxbuf_dma[i]); 494 495 for (i = 0; i < dev->nchannels; i++) { 496 struct kvaser_usb_net_priv *priv = dev->nets[i]; 497 498 if (priv) 499 kvaser_usb_unlink_tx_urbs(priv); 500 } 501 } 502 503 static int kvaser_usb_close(struct net_device *netdev) 504 { 505 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 506 struct kvaser_usb *dev = priv->dev; 507 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops; 508 int err; 509 510 netif_stop_queue(netdev); 511 512 err = ops->dev_flush_queue(priv); 513 if (err) 514 netdev_warn(netdev, "Cannot flush queue, error %d\n", err); 515 516 if (ops->dev_reset_chip) { 517 err = ops->dev_reset_chip(dev, priv->channel); 518 if (err) 519 netdev_warn(netdev, "Cannot reset card, error %d\n", 520 err); 521 } 522 523 err = ops->dev_stop_chip(priv); 524 if (err) 525 netdev_warn(netdev, "Cannot stop device, error %d\n", err); 526 527 /* reset tx contexts */ 528 kvaser_usb_unlink_tx_urbs(priv); 529 530 priv->can.state = CAN_STATE_STOPPED; 531 close_candev(priv->netdev); 532 533 return 0; 534 } 535 536 static void kvaser_usb_write_bulk_callback(struct urb *urb) 537 { 538 struct kvaser_usb_tx_urb_context *context = urb->context; 539 struct kvaser_usb_net_priv *priv; 540 struct net_device *netdev; 541 542 if (WARN_ON(!context)) 543 return; 544 545 priv = context->priv; 546 netdev = priv->netdev; 547 548 kfree(urb->transfer_buffer); 549 550 if (!netif_device_present(netdev)) 551 return; 552 553 if (urb->status) 554 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); 555 } 556 557 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, 558 struct net_device *netdev) 559 { 560 struct kvaser_usb_net_priv *priv = netdev_priv(netdev); 561 struct kvaser_usb *dev = priv->dev; 562 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops; 563 struct net_device_stats *stats = &netdev->stats; 564 struct kvaser_usb_tx_urb_context *context = NULL; 565 struct urb *urb; 566 void *buf; 567 int cmd_len = 0; 568 int err, ret = NETDEV_TX_OK; 569 unsigned int i; 570 unsigned long flags; 571 572 if (can_dropped_invalid_skb(netdev, skb)) 573 return NETDEV_TX_OK; 574 575 urb = usb_alloc_urb(0, GFP_ATOMIC); 576 if (!urb) { 577 stats->tx_dropped++; 578 dev_kfree_skb(skb); 579 return NETDEV_TX_OK; 580 } 581 582 spin_lock_irqsave(&priv->tx_contexts_lock, flags); 583 for (i = 0; i < dev->max_tx_urbs; i++) { 584 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) { 585 context = &priv->tx_contexts[i]; 586 587 context->echo_index = i; 588 ++priv->active_tx_contexts; 589 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs) 590 netif_stop_queue(netdev); 591 592 break; 593 } 594 } 595 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); 596 597 /* This should never happen; it implies a flow control bug */ 598 if (!context) { 599 netdev_warn(netdev, "cannot find free context\n"); 600 601 ret = NETDEV_TX_BUSY; 602 goto freeurb; 603 } 604 605 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index); 606 if (!buf) { 607 stats->tx_dropped++; 608 dev_kfree_skb(skb); 609 spin_lock_irqsave(&priv->tx_contexts_lock, flags); 610 611 context->echo_index = dev->max_tx_urbs; 612 --priv->active_tx_contexts; 613 netif_wake_queue(netdev); 614 615 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); 616 goto freeurb; 617 } 618 619 context->priv = priv; 620 621 can_put_echo_skb(skb, netdev, context->echo_index, 0); 622 623 usb_fill_bulk_urb(urb, dev->udev, 624 usb_sndbulkpipe(dev->udev, 625 dev->bulk_out->bEndpointAddress), 626 buf, cmd_len, kvaser_usb_write_bulk_callback, 627 context); 628 usb_anchor_urb(urb, &priv->tx_submitted); 629 630 err = usb_submit_urb(urb, GFP_ATOMIC); 631 if (unlikely(err)) { 632 spin_lock_irqsave(&priv->tx_contexts_lock, flags); 633 634 can_free_echo_skb(netdev, context->echo_index, NULL); 635 context->echo_index = dev->max_tx_urbs; 636 --priv->active_tx_contexts; 637 netif_wake_queue(netdev); 638 639 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); 640 641 usb_unanchor_urb(urb); 642 kfree(buf); 643 644 stats->tx_dropped++; 645 646 if (err == -ENODEV) 647 netif_device_detach(netdev); 648 else 649 netdev_warn(netdev, "Failed tx_urb %d\n", err); 650 651 goto freeurb; 652 } 653 654 ret = NETDEV_TX_OK; 655 656 freeurb: 657 usb_free_urb(urb); 658 return ret; 659 } 660 661 static const struct net_device_ops kvaser_usb_netdev_ops = { 662 .ndo_open = kvaser_usb_open, 663 .ndo_stop = kvaser_usb_close, 664 .ndo_start_xmit = kvaser_usb_start_xmit, 665 .ndo_change_mtu = can_change_mtu, 666 }; 667 668 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) 669 { 670 int i; 671 672 for (i = 0; i < dev->nchannels; i++) { 673 if (!dev->nets[i]) 674 continue; 675 676 unregister_candev(dev->nets[i]->netdev); 677 } 678 679 kvaser_usb_unlink_all_urbs(dev); 680 681 for (i = 0; i < dev->nchannels; i++) { 682 if (!dev->nets[i]) 683 continue; 684 685 free_candev(dev->nets[i]->netdev); 686 } 687 } 688 689 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel) 690 { 691 struct net_device *netdev; 692 struct kvaser_usb_net_priv *priv; 693 const struct kvaser_usb_driver_info *driver_info = dev->driver_info; 694 const struct kvaser_usb_dev_ops *ops = driver_info->ops; 695 int err; 696 697 if (ops->dev_reset_chip) { 698 err = ops->dev_reset_chip(dev, channel); 699 if (err) 700 return err; 701 } 702 703 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs), 704 dev->max_tx_urbs); 705 if (!netdev) { 706 dev_err(&dev->intf->dev, "Cannot alloc candev\n"); 707 return -ENOMEM; 708 } 709 710 priv = netdev_priv(netdev); 711 712 init_usb_anchor(&priv->tx_submitted); 713 init_completion(&priv->start_comp); 714 init_completion(&priv->stop_comp); 715 priv->can.ctrlmode_supported = 0; 716 717 priv->dev = dev; 718 priv->netdev = netdev; 719 priv->channel = channel; 720 721 spin_lock_init(&priv->tx_contexts_lock); 722 kvaser_usb_reset_tx_urb_contexts(priv); 723 724 priv->can.state = CAN_STATE_STOPPED; 725 priv->can.clock.freq = dev->cfg->clock.freq; 726 priv->can.bittiming_const = dev->cfg->bittiming_const; 727 priv->can.do_set_bittiming = ops->dev_set_bittiming; 728 priv->can.do_set_mode = ops->dev_set_mode; 729 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) || 730 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP)) 731 priv->can.do_get_berr_counter = ops->dev_get_berr_counter; 732 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE) 733 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; 734 735 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported; 736 737 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) { 738 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const; 739 priv->can.do_set_data_bittiming = ops->dev_set_data_bittiming; 740 } 741 742 netdev->flags |= IFF_ECHO; 743 744 netdev->netdev_ops = &kvaser_usb_netdev_ops; 745 746 SET_NETDEV_DEV(netdev, &dev->intf->dev); 747 netdev->dev_id = channel; 748 749 dev->nets[channel] = priv; 750 751 err = register_candev(netdev); 752 if (err) { 753 dev_err(&dev->intf->dev, "Failed to register CAN device\n"); 754 free_candev(netdev); 755 dev->nets[channel] = NULL; 756 return err; 757 } 758 759 netdev_dbg(netdev, "device registered\n"); 760 761 return 0; 762 } 763 764 static int kvaser_usb_probe(struct usb_interface *intf, 765 const struct usb_device_id *id) 766 { 767 struct kvaser_usb *dev; 768 int err; 769 int i; 770 const struct kvaser_usb_driver_info *driver_info; 771 const struct kvaser_usb_dev_ops *ops; 772 773 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info; 774 if (!driver_info) 775 return -ENODEV; 776 777 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); 778 if (!dev) 779 return -ENOMEM; 780 781 dev->intf = intf; 782 dev->driver_info = driver_info; 783 ops = driver_info->ops; 784 785 err = ops->dev_setup_endpoints(dev); 786 if (err) { 787 dev_err(&intf->dev, "Cannot get usb endpoint(s)"); 788 return err; 789 } 790 791 dev->udev = interface_to_usbdev(intf); 792 793 init_usb_anchor(&dev->rx_submitted); 794 795 usb_set_intfdata(intf, dev); 796 797 dev->card_data.ctrlmode_supported = 0; 798 dev->card_data.capabilities = 0; 799 err = ops->dev_init_card(dev); 800 if (err) { 801 dev_err(&intf->dev, 802 "Failed to initialize card, error %d\n", err); 803 return err; 804 } 805 806 err = ops->dev_get_software_info(dev); 807 if (err) { 808 dev_err(&intf->dev, 809 "Cannot get software info, error %d\n", err); 810 return err; 811 } 812 813 if (ops->dev_get_software_details) { 814 err = ops->dev_get_software_details(dev); 815 if (err) { 816 dev_err(&intf->dev, 817 "Cannot get software details, error %d\n", err); 818 return err; 819 } 820 } 821 822 if (WARN_ON(!dev->cfg)) 823 return -ENODEV; 824 825 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", 826 ((dev->fw_version >> 24) & 0xff), 827 ((dev->fw_version >> 16) & 0xff), 828 (dev->fw_version & 0xffff)); 829 830 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs); 831 832 err = ops->dev_get_card_info(dev); 833 if (err) { 834 dev_err(&intf->dev, "Cannot get card info, error %d\n", err); 835 return err; 836 } 837 838 if (ops->dev_get_capabilities) { 839 err = ops->dev_get_capabilities(dev); 840 if (err) { 841 dev_err(&intf->dev, 842 "Cannot get capabilities, error %d\n", err); 843 kvaser_usb_remove_interfaces(dev); 844 return err; 845 } 846 } 847 848 for (i = 0; i < dev->nchannels; i++) { 849 err = kvaser_usb_init_one(dev, i); 850 if (err) { 851 kvaser_usb_remove_interfaces(dev); 852 return err; 853 } 854 } 855 856 return 0; 857 } 858 859 static void kvaser_usb_disconnect(struct usb_interface *intf) 860 { 861 struct kvaser_usb *dev = usb_get_intfdata(intf); 862 863 usb_set_intfdata(intf, NULL); 864 865 if (!dev) 866 return; 867 868 kvaser_usb_remove_interfaces(dev); 869 } 870 871 static struct usb_driver kvaser_usb_driver = { 872 .name = "kvaser_usb", 873 .probe = kvaser_usb_probe, 874 .disconnect = kvaser_usb_disconnect, 875 .id_table = kvaser_usb_table, 876 }; 877 878 module_usb_driver(kvaser_usb_driver); 879 880 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); 881 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>"); 882 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); 883 MODULE_LICENSE("GPL v2"); 884