drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c

   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  *
   7  * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
   8  * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
   9  * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
  10  * Copyright (C) 2015 Valeo S.A.
  11  */
  12
  13 #include <linux/completion.h>
  14 #include <linux/device.h>
  15 #include <linux/gfp.h>
  16 #include <linux/jiffies.h>
  17 #include <linux/kernel.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/spinlock.h>
  20 #include <linux/string.h>
  21 #include <linux/types.h>
  22 #include <linux/usb.h>
  23 #include <linux/workqueue.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 #define MAX_USBCAN_NET_DEVICES          2
  33
  34 /* Command header size */
  35 #define CMD_HEADER_LEN                  2
  36
  37 /* Kvaser CAN message flags */
  38 #define MSG_FLAG_ERROR_FRAME            BIT(0)
  39 #define MSG_FLAG_OVERRUN                BIT(1)
  40 #define MSG_FLAG_NERR                   BIT(2)
  41 #define MSG_FLAG_WAKEUP                 BIT(3)
  42 #define MSG_FLAG_REMOTE_FRAME           BIT(4)
  43 #define MSG_FLAG_RESERVED               BIT(5)
  44 #define MSG_FLAG_TX_ACK                 BIT(6)
  45 #define MSG_FLAG_TX_REQUEST             BIT(7)
  46
  47 /* CAN states (M16C CxSTRH register) */
  48 #define M16C_STATE_BUS_RESET            BIT(0)
  49 #define M16C_STATE_BUS_ERROR            BIT(4)
  50 #define M16C_STATE_BUS_PASSIVE          BIT(5)
  51 #define M16C_STATE_BUS_OFF              BIT(6)
  52
  53 /* Leaf/usbcan command ids */
  54 #define CMD_RX_STD_MESSAGE              12
  55 #define CMD_TX_STD_MESSAGE              13
  56 #define CMD_RX_EXT_MESSAGE              14
  57 #define CMD_TX_EXT_MESSAGE              15
  58 #define CMD_SET_BUS_PARAMS              16
  59 #define CMD_GET_BUS_PARAMS              17
  60 #define CMD_GET_BUS_PARAMS_REPLY        18
  61 #define CMD_GET_CHIP_STATE              19
  62 #define CMD_CHIP_STATE_EVENT            20
  63 #define CMD_SET_CTRL_MODE               21
  64 #define CMD_RESET_CHIP                  24
  65 #define CMD_START_CHIP                  26
  66 #define CMD_START_CHIP_REPLY            27
  67 #define CMD_STOP_CHIP                   28
  68 #define CMD_STOP_CHIP_REPLY             29
  69
  70 #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33
  71
  72 #define CMD_GET_CARD_INFO               34
  73 #define CMD_GET_CARD_INFO_REPLY         35
  74 #define CMD_GET_SOFTWARE_INFO           38
  75 #define CMD_GET_SOFTWARE_INFO_REPLY     39
  76 #define CMD_ERROR_EVENT                 45
  77 #define CMD_FLUSH_QUEUE                 48
  78 #define CMD_TX_ACKNOWLEDGE              50
  79 #define CMD_CAN_ERROR_EVENT             51
  80 #define CMD_FLUSH_QUEUE_REPLY           68
  81 #define CMD_GET_CAPABILITIES_REQ        95
  82 #define CMD_GET_CAPABILITIES_RESP       96
  83
  84 #define CMD_LEAF_LOG_MESSAGE            106
  85
  86 /* Leaf frequency options */
  87 #define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60
  88 #define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0
  89 #define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)
  90 #define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)
  91
  92 #define KVASER_USB_LEAF_SWOPTION_EXT_CAP BIT(12)
  93
  94 /* error factors */
  95 #define M16C_EF_ACKE                    BIT(0)
  96 #define M16C_EF_CRCE                    BIT(1)
  97 #define M16C_EF_FORME                   BIT(2)
  98 #define M16C_EF_STFE                    BIT(3)
  99 #define M16C_EF_BITE0                   BIT(4)
 100 #define M16C_EF_BITE1                   BIT(5)
 101 #define M16C_EF_RCVE                    BIT(6)
 102 #define M16C_EF_TRE                     BIT(7)
 103
 104 /* Only Leaf-based devices can report M16C error factors,
 105  * thus define our own error status flags for USBCANII
 106  */
 107 #define USBCAN_ERROR_STATE_NONE         0
 108 #define USBCAN_ERROR_STATE_TX_ERROR     BIT(0)
 109 #define USBCAN_ERROR_STATE_RX_ERROR     BIT(1)
 110 #define USBCAN_ERROR_STATE_BUSERROR     BIT(2)
 111
 112 /* ctrl modes */
 113 #define KVASER_CTRL_MODE_NORMAL         1
 114 #define KVASER_CTRL_MODE_SILENT         2
 115 #define KVASER_CTRL_MODE_SELFRECEPTION  3
 116 #define KVASER_CTRL_MODE_OFF            4
 117
 118 /* Extended CAN identifier flag */
 119 #define KVASER_EXTENDED_FRAME           BIT(31)
 120
 121 struct kvaser_cmd_simple {
 122         u8 tid;
 123         u8 channel;
 124 } __packed;
 125
 126 struct kvaser_cmd_cardinfo {
 127         u8 tid;
 128         u8 nchannels;
 129         __le32 serial_number;
 130         __le32 padding0;
 131         __le32 clock_resolution;
 132         __le32 mfgdate;
 133         u8 ean[8];
 134         u8 hw_revision;
 135         union {
 136                 struct {
 137                         u8 usb_hs_mode;
 138                 } __packed leaf1;
 139                 struct {
 140                         u8 padding;
 141                 } __packed usbcan1;
 142         } __packed;
 143         __le16 padding1;
 144 } __packed;
 145
 146 struct leaf_cmd_softinfo {
 147         u8 tid;
 148         u8 padding0;
 149         __le32 sw_options;
 150         __le32 fw_version;
 151         __le16 max_outstanding_tx;
 152         __le16 padding1[9];
 153 } __packed;
 154
 155 struct usbcan_cmd_softinfo {
 156         u8 tid;
 157         u8 fw_name[5];
 158         __le16 max_outstanding_tx;
 159         u8 padding[6];
 160         __le32 fw_version;
 161         __le16 checksum;
 162         __le16 sw_options;
 163 } __packed;
 164
 165 struct kvaser_cmd_busparams {
 166         u8 tid;
 167         u8 channel;
 168         struct kvaser_usb_busparams busparams;
 169 } __packed;
 170
 171 struct kvaser_cmd_tx_can {
 172         u8 channel;
 173         u8 tid;
 174         u8 data[14];
 175         union {
 176                 struct {
 177                         u8 padding;
 178                         u8 flags;
 179                 } __packed leaf;
 180                 struct {
 181                         u8 flags;
 182                         u8 padding;
 183                 } __packed usbcan;
 184         } __packed;
 185 } __packed;
 186
 187 struct kvaser_cmd_rx_can_header {
 188         u8 channel;
 189         u8 flag;
 190 } __packed;
 191
 192 struct leaf_cmd_rx_can {
 193         u8 channel;
 194         u8 flag;
 195
 196         __le16 time[3];
 197         u8 data[14];
 198 } __packed;
 199
 200 struct usbcan_cmd_rx_can {
 201         u8 channel;
 202         u8 flag;
 203
 204         u8 data[14];
 205         __le16 time;
 206 } __packed;
 207
 208 struct leaf_cmd_chip_state_event {
 209         u8 tid;
 210         u8 channel;
 211
 212         __le16 time[3];
 213         u8 tx_errors_count;
 214         u8 rx_errors_count;
 215
 216         u8 status;
 217         u8 padding[3];
 218 } __packed;
 219
 220 struct usbcan_cmd_chip_state_event {
 221         u8 tid;
 222         u8 channel;
 223
 224         u8 tx_errors_count;
 225         u8 rx_errors_count;
 226         __le16 time;
 227
 228         u8 status;
 229         u8 padding[3];
 230 } __packed;
 231
 232 struct kvaser_cmd_tx_acknowledge_header {
 233         u8 channel;
 234         u8 tid;
 235 } __packed;
 236
 237 struct leaf_cmd_can_error_event {
 238         u8 tid;
 239         u8 flags;
 240         __le16 time[3];
 241         u8 channel;
 242         u8 padding;
 243         u8 tx_errors_count;
 244         u8 rx_errors_count;
 245         u8 status;
 246         u8 error_factor;
 247 } __packed;
 248
 249 struct usbcan_cmd_can_error_event {
 250         u8 tid;
 251         u8 padding;
 252         u8 tx_errors_count_ch0;
 253         u8 rx_errors_count_ch0;
 254         u8 tx_errors_count_ch1;
 255         u8 rx_errors_count_ch1;
 256         u8 status_ch0;
 257         u8 status_ch1;
 258         __le16 time;
 259 } __packed;
 260
 261 /* CMD_ERROR_EVENT error codes */
 262 #define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL 0x8
 263 #define KVASER_USB_LEAF_ERROR_EVENT_PARAM 0x9
 264
 265 struct leaf_cmd_error_event {
 266         u8 tid;
 267         u8 error_code;
 268         __le16 timestamp[3];
 269         __le16 padding;
 270         __le16 info1;
 271         __le16 info2;
 272 } __packed;
 273
 274 struct usbcan_cmd_error_event {
 275         u8 tid;
 276         u8 error_code;
 277         __le16 info1;
 278         __le16 info2;
 279         __le16 timestamp;
 280         __le16 padding;
 281 } __packed;
 282
 283 struct kvaser_cmd_ctrl_mode {
 284         u8 tid;
 285         u8 channel;
 286         u8 ctrl_mode;
 287         u8 padding[3];
 288 } __packed;
 289
 290 struct kvaser_cmd_flush_queue {
 291         u8 tid;
 292         u8 channel;
 293         u8 flags;
 294         u8 padding[3];
 295 } __packed;
 296
 297 struct leaf_cmd_log_message {
 298         u8 channel;
 299         u8 flags;
 300         __le16 time[3];
 301         u8 dlc;
 302         u8 time_offset;
 303         __le32 id;
 304         u8 data[8];
 305 } __packed;
 306
 307 /* Sub commands for cap_req and cap_res */
 308 #define KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE 0x02
 309 #define KVASER_USB_LEAF_CAP_CMD_ERR_REPORT 0x05
 310 struct kvaser_cmd_cap_req {
 311         __le16 padding0;
 312         __le16 cap_cmd;
 313         __le16 padding1;
 314         __le16 channel;
 315 } __packed;
 316
 317 /* Status codes for cap_res */
 318 #define KVASER_USB_LEAF_CAP_STAT_OK 0x00
 319 #define KVASER_USB_LEAF_CAP_STAT_NOT_IMPL 0x01
 320 #define KVASER_USB_LEAF_CAP_STAT_UNAVAIL 0x02
 321 struct kvaser_cmd_cap_res {
 322         __le16 padding;
 323         __le16 cap_cmd;
 324         __le16 status;
 325         __le32 mask;
 326         __le32 value;
 327 } __packed;
 328
 329 struct kvaser_cmd {
 330         u8 len;
 331         u8 id;
 332         union   {
 333                 struct kvaser_cmd_simple simple;
 334                 struct kvaser_cmd_cardinfo cardinfo;
 335                 struct kvaser_cmd_busparams busparams;
 336
 337                 struct kvaser_cmd_rx_can_header rx_can_header;
 338                 struct kvaser_cmd_tx_acknowledge_header tx_acknowledge_header;
 339
 340                 union {
 341                         struct leaf_cmd_softinfo softinfo;
 342                         struct leaf_cmd_rx_can rx_can;
 343                         struct leaf_cmd_chip_state_event chip_state_event;
 344                         struct leaf_cmd_can_error_event can_error_event;
 345                         struct leaf_cmd_log_message log_message;
 346                         struct leaf_cmd_error_event error_event;
 347                         struct kvaser_cmd_cap_req cap_req;
 348                         struct kvaser_cmd_cap_res cap_res;
 349                 } __packed leaf;
 350
 351                 union {
 352                         struct usbcan_cmd_softinfo softinfo;
 353                         struct usbcan_cmd_rx_can rx_can;
 354                         struct usbcan_cmd_chip_state_event chip_state_event;
 355                         struct usbcan_cmd_can_error_event can_error_event;
 356                         struct usbcan_cmd_error_event error_event;
 357                 } __packed usbcan;
 358
 359                 struct kvaser_cmd_tx_can tx_can;
 360                 struct kvaser_cmd_ctrl_mode ctrl_mode;
 361                 struct kvaser_cmd_flush_queue flush_queue;
 362         } u;
 363 } __packed;
 364
 365 #define CMD_SIZE_ANY 0xff
 366 #define kvaser_fsize(field) sizeof_field(struct kvaser_cmd, field)
 367
 368 static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = {
 369         [CMD_START_CHIP_REPLY]          = kvaser_fsize(u.simple),
 370         [CMD_STOP_CHIP_REPLY]           = kvaser_fsize(u.simple),
 371         [CMD_GET_CARD_INFO_REPLY]       = kvaser_fsize(u.cardinfo),
 372         [CMD_TX_ACKNOWLEDGE]            = kvaser_fsize(u.tx_acknowledge_header),
 373         [CMD_GET_SOFTWARE_INFO_REPLY]   = kvaser_fsize(u.leaf.softinfo),
 374         [CMD_RX_STD_MESSAGE]            = kvaser_fsize(u.leaf.rx_can),
 375         [CMD_RX_EXT_MESSAGE]            = kvaser_fsize(u.leaf.rx_can),
 376         [CMD_LEAF_LOG_MESSAGE]          = kvaser_fsize(u.leaf.log_message),
 377         [CMD_CHIP_STATE_EVENT]          = kvaser_fsize(u.leaf.chip_state_event),
 378         [CMD_CAN_ERROR_EVENT]           = kvaser_fsize(u.leaf.can_error_event),
 379         [CMD_GET_CAPABILITIES_RESP]     = kvaser_fsize(u.leaf.cap_res),
 380         [CMD_GET_BUS_PARAMS_REPLY]      = kvaser_fsize(u.busparams),
 381         [CMD_ERROR_EVENT]               = kvaser_fsize(u.leaf.error_event),
 382         /* ignored events: */
 383         [CMD_FLUSH_QUEUE_REPLY]         = CMD_SIZE_ANY,
 384 };
 385
 386 static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = {
 387         [CMD_START_CHIP_REPLY]          = kvaser_fsize(u.simple),
 388         [CMD_STOP_CHIP_REPLY]           = kvaser_fsize(u.simple),
 389         [CMD_GET_CARD_INFO_REPLY]       = kvaser_fsize(u.cardinfo),
 390         [CMD_TX_ACKNOWLEDGE]            = kvaser_fsize(u.tx_acknowledge_header),
 391         [CMD_GET_SOFTWARE_INFO_REPLY]   = kvaser_fsize(u.usbcan.softinfo),
 392         [CMD_RX_STD_MESSAGE]            = kvaser_fsize(u.usbcan.rx_can),
 393         [CMD_RX_EXT_MESSAGE]            = kvaser_fsize(u.usbcan.rx_can),
 394         [CMD_CHIP_STATE_EVENT]          = kvaser_fsize(u.usbcan.chip_state_event),
 395         [CMD_CAN_ERROR_EVENT]           = kvaser_fsize(u.usbcan.can_error_event),
 396         [CMD_ERROR_EVENT]               = kvaser_fsize(u.usbcan.error_event),
 397         /* ignored events: */
 398         [CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = CMD_SIZE_ANY,
 399 };
 400
 401 /* Summary of a kvaser error event, for a unified Leaf/Usbcan error
 402  * handling. Some discrepancies between the two families exist:
 403  *
 404  * - USBCAN firmware does not report M16C "error factors"
 405  * - USBCAN controllers has difficulties reporting if the raised error
 406  *   event is for ch0 or ch1. They leave such arbitration to the OS
 407  *   driver by letting it compare error counters with previous values
 408  *   and decide the error event's channel. Thus for USBCAN, the channel
 409  *   field is only advisory.
 410  */
 411 struct kvaser_usb_err_summary {
 412         u8 channel, status, txerr, rxerr;
 413         union {
 414                 struct {
 415                         u8 error_factor;
 416                 } leaf;
 417                 struct {
 418                         u8 other_ch_status;
 419                         u8 error_state;
 420                 } usbcan;
 421         };
 422 };
 423
 424 struct kvaser_usb_net_leaf_priv {
 425         struct kvaser_usb_net_priv *net;
 426
 427         struct delayed_work chip_state_req_work;
 428 };
 429
 430 static const struct can_bittiming_const kvaser_usb_leaf_m16c_bittiming_const = {
 431         .name = "kvaser_usb_ucii",
 432         .tseg1_min = 4,
 433         .tseg1_max = 16,
 434         .tseg2_min = 2,
 435         .tseg2_max = 8,
 436         .sjw_max = 4,
 437         .brp_min = 1,
 438         .brp_max = 16,
 439         .brp_inc = 1,
 440 };
 441
 442 static const struct can_bittiming_const kvaser_usb_leaf_m32c_bittiming_const = {
 443         .name = "kvaser_usb_leaf",
 444         .tseg1_min = 3,
 445         .tseg1_max = 16,
 446         .tseg2_min = 2,
 447         .tseg2_max = 8,
 448         .sjw_max = 4,
 449         .brp_min = 2,
 450         .brp_max = 128,
 451         .brp_inc = 2,
 452 };
 453
 454 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = {
 455         .clock = {
 456                 .freq = 8000000,
 457         },
 458         .timestamp_freq = 1,
 459         .bittiming_const = &kvaser_usb_leaf_m16c_bittiming_const,
 460 };
 461
 462 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg = {
 463         .clock = {
 464                 .freq = 16000000,
 465         },
 466         .timestamp_freq = 1,
 467         .bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
 468 };
 469
 470 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = {
 471         .clock = {
 472                 .freq = 16000000,
 473         },
 474         .timestamp_freq = 1,
 475         .bittiming_const = &kvaser_usb_flexc_bittiming_const,
 476 };
 477
 478 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = {
 479         .clock = {
 480                 .freq = 24000000,
 481         },
 482         .timestamp_freq = 1,
 483         .bittiming_const = &kvaser_usb_flexc_bittiming_const,
 484 };
 485
 486 static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = {
 487         .clock = {
 488                 .freq = 32000000,
 489         },
 490         .timestamp_freq = 1,
 491         .bittiming_const = &kvaser_usb_flexc_bittiming_const,
 492 };
 493
 494 static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev,
 495                                        const struct kvaser_cmd *cmd)
 496 {
 497         /* buffer size >= cmd->len ensured by caller */
 498         u8 min_size = 0;
 499
 500         switch (dev->driver_info->family) {
 501         case KVASER_LEAF:
 502                 if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_leaf))
 503                         min_size = kvaser_usb_leaf_cmd_sizes_leaf[cmd->id];
 504                 break;
 505         case KVASER_USBCAN:
 506                 if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_usbcan))
 507                         min_size = kvaser_usb_leaf_cmd_sizes_usbcan[cmd->id];
 508                 break;
 509         }
 510
 511         if (min_size == CMD_SIZE_ANY)
 512                 return 0;
 513
 514         if (min_size) {
 515                 min_size += CMD_HEADER_LEN;
 516                 if (cmd->len >= min_size)
 517                         return 0;
 518
 519                 dev_err_ratelimited(&dev->intf->dev,
 520                                     "Received command %u too short (size %u, needed %u)",
 521                                     cmd->id, cmd->len, min_size);
 522                 return -EIO;
 523         }
 524
 525         dev_warn_ratelimited(&dev->intf->dev,
 526                              "Unhandled command (%d, size %d)\n",
 527                              cmd->id, cmd->len);
 528         return -EINVAL;
 529 }
 530
 531 static void *
 532 kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv,
 533                              const struct sk_buff *skb, int *frame_len,
 534                              int *cmd_len, u16 transid)
 535 {
 536         struct kvaser_usb *dev = priv->dev;
 537         struct kvaser_cmd *cmd;
 538         u8 *cmd_tx_can_flags = NULL;            /* GCC */
 539         struct can_frame *cf = (struct can_frame *)skb->data;
 540
 541         *frame_len = cf->can_dlc;
 542
 543         cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
 544         if (cmd) {
 545                 cmd->u.tx_can.tid = transid & 0xff;
 546                 cmd->len = *cmd_len = CMD_HEADER_LEN +
 547                                       sizeof(struct kvaser_cmd_tx_can);
 548                 cmd->u.tx_can.channel = priv->channel;
 549
 550                 switch (dev->driver_info->family) {
 551                 case KVASER_LEAF:
 552                         cmd_tx_can_flags = &cmd->u.tx_can.leaf.flags;
 553                         break;
 554                 case KVASER_USBCAN:
 555                         cmd_tx_can_flags = &cmd->u.tx_can.usbcan.flags;
 556                         break;
 557                 }
 558
 559                 *cmd_tx_can_flags = 0;
 560
 561                 if (cf->can_id & CAN_EFF_FLAG) {
 562                         cmd->id = CMD_TX_EXT_MESSAGE;
 563                         cmd->u.tx_can.data[0] = (cf->can_id >> 24) & 0x1f;
 564                         cmd->u.tx_can.data[1] = (cf->can_id >> 18) & 0x3f;
 565                         cmd->u.tx_can.data[2] = (cf->can_id >> 14) & 0x0f;
 566                         cmd->u.tx_can.data[3] = (cf->can_id >> 6) & 0xff;
 567                         cmd->u.tx_can.data[4] = cf->can_id & 0x3f;
 568                 } else {
 569                         cmd->id = CMD_TX_STD_MESSAGE;
 570                         cmd->u.tx_can.data[0] = (cf->can_id >> 6) & 0x1f;
 571                         cmd->u.tx_can.data[1] = cf->can_id & 0x3f;
 572                 }
 573
 574                 cmd->u.tx_can.data[5] = cf->can_dlc;
 575                 memcpy(&cmd->u.tx_can.data[6], cf->data, cf->can_dlc);
 576
 577                 if (cf->can_id & CAN_RTR_FLAG)
 578                         *cmd_tx_can_flags |= MSG_FLAG_REMOTE_FRAME;
 579         }
 580         return cmd;
 581 }
 582
 583 static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id,
 584                                     struct kvaser_cmd *cmd)
 585 {
 586         struct kvaser_cmd *tmp;
 587         void *buf;
 588         int actual_len;
 589         int err;
 590         int pos;
 591         unsigned long to = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT);
 592
 593         buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL);
 594         if (!buf)
 595                 return -ENOMEM;
 596
 597         do {
 598                 err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE,
 599                                           &actual_len);
 600                 if (err < 0)
 601                         goto end;
 602
 603                 pos = 0;
 604                 while (pos <= actual_len - CMD_HEADER_LEN) {
 605                         tmp = buf + pos;
 606
 607                         /* Handle commands crossing the USB endpoint max packet
 608                          * size boundary. Check kvaser_usb_read_bulk_callback()
 609                          * for further details.
 610                          */
 611                         if (tmp->len == 0) {
 612                                 pos = round_up(pos,
 613                                                le16_to_cpu
 614                                                 (dev->bulk_in->wMaxPacketSize));
 615                                 continue;
 616                         }
 617
 618                         if (pos + tmp->len > actual_len) {
 619                                 dev_err_ratelimited(&dev->intf->dev,
 620                                                     "Format error\n");
 621                                 break;
 622                         }
 623
 624                         if (tmp->id == id) {
 625                                 memcpy(cmd, tmp, tmp->len);
 626                                 goto end;
 627                         }
 628
 629                         pos += tmp->len;
 630                 }
 631         } while (time_before(jiffies, to));
 632
 633         err = -EINVAL;
 634
 635 end:
 636         kfree(buf);
 637
 638         if (err == 0)
 639                 err = kvaser_usb_leaf_verify_size(dev, cmd);
 640
 641         return err;
 642 }
 643
 644 static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,
 645                                            u8 cmd_id, int channel)
 646 {
 647         struct kvaser_cmd *cmd;
 648         int rc;
 649
 650         cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
 651         if (!cmd)
 652                 return -ENOMEM;
 653
 654         cmd->id = cmd_id;
 655         cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
 656         cmd->u.simple.channel = channel;
 657         cmd->u.simple.tid = 0xff;
 658
 659         rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
 660
 661         kfree(cmd);
 662         return rc;
 663 }
 664
 665 static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
 666                                                    const struct leaf_cmd_softinfo *softinfo)
 667 {
 668         u32 sw_options = le32_to_cpu(softinfo->sw_options);
 669
 670         dev->fw_version = le32_to_cpu(softinfo->fw_version);
 671         dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);
 672
 673         if (sw_options & KVASER_USB_LEAF_SWOPTION_EXT_CAP)
 674                 dev->card_data.capabilities |= KVASER_USB_CAP_EXT_CAP;
 675
 676         if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) {
 677                 /* Firmware expects bittiming parameters calculated for 16MHz
 678                  * clock, regardless of the actual clock
 679                  */
 680                 dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg;
 681         } else {
 682                 switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
 683                 case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
 684                         dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_16mhz;
 685                         break;
 686                 case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
 687                         dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_24mhz;
 688                         break;
 689                 case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
 690                         dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_32mhz;
 691                         break;
 692                 }
 693         }
 694 }
 695
 696 static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
 697 {
 698         struct kvaser_cmd cmd;
 699         int err;
 700
 701         err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0);
 702         if (err)
 703                 return err;
 704
 705         err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd);
 706         if (err)
 707                 return err;
 708
 709         switch (dev->driver_info->family) {
 710         case KVASER_LEAF:
 711                 kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);
 712                 break;
 713         case KVASER_USBCAN:
 714                 dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);
 715                 dev->max_tx_urbs =
 716                         le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);
 717                 dev->cfg = &kvaser_usb_leaf_usbcan_dev_cfg;
 718                 break;
 719         }
 720
 721         return 0;
 722 }
 723
 724 static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev)
 725 {
 726         int err;
 727         int retry = 3;
 728
 729         /* On some x86 laptops, plugging a Kvaser device again after
 730          * an unplug makes the firmware always ignore the very first
 731          * command. For such a case, provide some room for retries
 732          * instead of completely exiting the driver.
 733          */
 734         do {
 735                 err = kvaser_usb_leaf_get_software_info_inner(dev);
 736         } while (--retry && err == -ETIMEDOUT);
 737
 738         return err;
 739 }
 740
 741 static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev)
 742 {
 743         struct kvaser_cmd cmd;
 744         int err;
 745
 746         err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0);
 747         if (err)
 748                 return err;
 749
 750         err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd);
 751         if (err)
 752                 return err;
 753
 754         dev->nchannels = cmd.u.cardinfo.nchannels;
 755         if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES ||
 756             (dev->driver_info->family == KVASER_USBCAN &&
 757              dev->nchannels > MAX_USBCAN_NET_DEVICES))
 758                 return -EINVAL;
 759
 760         return 0;
 761 }
 762
 763 static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev,
 764                                                  u16 cap_cmd_req, u16 *status)
 765 {
 766         struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
 767         struct kvaser_cmd *cmd;
 768         u32 value = 0;
 769         u32 mask = 0;
 770         u16 cap_cmd_res;
 771         int err;
 772         int i;
 773
 774         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 775         if (!cmd)
 776                 return -ENOMEM;
 777
 778         cmd->id = CMD_GET_CAPABILITIES_REQ;
 779         cmd->u.leaf.cap_req.cap_cmd = cpu_to_le16(cap_cmd_req);
 780         cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_cap_req);
 781
 782         err = kvaser_usb_send_cmd(dev, cmd, cmd->len);
 783         if (err)
 784                 goto end;
 785
 786         err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd);
 787         if (err)
 788                 goto end;
 789
 790         *status = le16_to_cpu(cmd->u.leaf.cap_res.status);
 791
 792         if (*status != KVASER_USB_LEAF_CAP_STAT_OK)
 793                 goto end;
 794
 795         cap_cmd_res = le16_to_cpu(cmd->u.leaf.cap_res.cap_cmd);
 796         switch (cap_cmd_res) {
 797         case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
 798         case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
 799                 value = le32_to_cpu(cmd->u.leaf.cap_res.value);
 800                 mask = le32_to_cpu(cmd->u.leaf.cap_res.mask);
 801                 break;
 802         default:
 803                 dev_warn(&dev->intf->dev, "Unknown capability command %u\n",
 804                          cap_cmd_res);
 805                 break;
 806         }
 807
 808         for (i = 0; i < dev->nchannels; i++) {
 809                 if (BIT(i) & (value & mask)) {
 810                         switch (cap_cmd_res) {
 811                         case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
 812                                 card_data->ctrlmode_supported |=
 813                                                 CAN_CTRLMODE_LISTENONLY;
 814                                 break;
 815                         case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
 816                                 card_data->capabilities |=
 817                                                 KVASER_USB_CAP_BERR_CAP;
 818                                 break;
 819                         }
 820                 }
 821         }
 822
 823 end:
 824         kfree(cmd);
 825
 826         return err;
 827 }
 828
 829 static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev)
 830 {
 831         int err;
 832         u16 status;
 833
 834         if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) {
 835                 dev_info(&dev->intf->dev,
 836                          "No extended capability support. Upgrade device firmware.\n");
 837                 return 0;
 838         }
 839
 840         err = kvaser_usb_leaf_get_single_capability(dev,
 841                                                     KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE,
 842                                                     &status);
 843         if (err)
 844                 return err;
 845         if (status)
 846                 dev_info(&dev->intf->dev,
 847                          "KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE failed %u\n",
 848                          status);
 849
 850         err = kvaser_usb_leaf_get_single_capability(dev,
 851                                                     KVASER_USB_LEAF_CAP_CMD_ERR_REPORT,
 852                                                     &status);
 853         if (err)
 854                 return err;
 855         if (status)
 856                 dev_info(&dev->intf->dev,
 857                          "KVASER_USB_LEAF_CAP_CMD_ERR_REPORT failed %u\n",
 858                          status);
 859
 860         return 0;
 861 }
 862
 863 static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev)
 864 {
 865         int err = 0;
 866
 867         if (dev->driver_info->family == KVASER_LEAF)
 868                 err = kvaser_usb_leaf_get_capabilities_leaf(dev);
 869
 870         return err;
 871 }
 872
 873 static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
 874                                            const struct kvaser_cmd *cmd)
 875 {
 876         struct net_device_stats *stats;
 877         struct kvaser_usb_tx_urb_context *context;
 878         struct kvaser_usb_net_priv *priv;
 879         unsigned long flags;
 880         u8 channel, tid;
 881
 882         channel = cmd->u.tx_acknowledge_header.channel;
 883         tid = cmd->u.tx_acknowledge_header.tid;
 884
 885         if (channel >= dev->nchannels) {
 886                 dev_err(&dev->intf->dev,
 887                         "Invalid channel number (%d)\n", channel);
 888                 return;
 889         }
 890
 891         priv = dev->nets[channel];
 892
 893         if (!netif_device_present(priv->netdev))
 894                 return;
 895
 896         stats = &priv->netdev->stats;
 897
 898         context = &priv->tx_contexts[tid % dev->max_tx_urbs];
 899
 900         /* Sometimes the state change doesn't come after a bus-off event */
 901         if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) {
 902                 struct sk_buff *skb;
 903                 struct can_frame *cf;
 904
 905                 skb = alloc_can_err_skb(priv->netdev, &cf);
 906                 if (skb) {
 907                         cf->can_id |= CAN_ERR_RESTARTED;
 908
 909                         stats->rx_packets++;
 910                         stats->rx_bytes += cf->can_dlc;
 911                         netif_rx(skb);
 912                 } else {
 913                         netdev_err(priv->netdev,
 914                                    "No memory left for err_skb\n");
 915                 }
 916
 917                 priv->can.can_stats.restarts++;
 918                 netif_carrier_on(priv->netdev);
 919
 920                 priv->can.state = CAN_STATE_ERROR_ACTIVE;
 921         }
 922
 923         stats->tx_packets++;
 924         stats->tx_bytes += context->dlc;
 925
 926         spin_lock_irqsave(&priv->tx_contexts_lock, flags);
 927
 928         can_get_echo_skb(priv->netdev, context->echo_index);
 929         context->echo_index = dev->max_tx_urbs;
 930         --priv->active_tx_contexts;
 931         netif_wake_queue(priv->netdev);
 932
 933         spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
 934 }
 935
 936 static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv,
 937                                             u8 cmd_id)
 938 {
 939         struct kvaser_cmd *cmd;
 940         int err;
 941
 942         cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
 943         if (!cmd)
 944                 return -ENOMEM;
 945
 946         cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
 947         cmd->id = cmd_id;
 948         cmd->u.simple.channel = priv->channel;
 949
 950         err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len);
 951         if (err)
 952                 kfree(cmd);
 953
 954         return err;
 955 }
 956
 957 static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work)
 958 {
 959         struct kvaser_usb_net_leaf_priv *leaf =
 960                 container_of(work, struct kvaser_usb_net_leaf_priv,
 961                              chip_state_req_work.work);
 962         struct kvaser_usb_net_priv *priv = leaf->net;
 963
 964         kvaser_usb_leaf_simple_cmd_async(priv, CMD_GET_CHIP_STATE);
 965 }
 966
 967 static void
 968 kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,
 969                                         const struct kvaser_usb_err_summary *es,
 970                                         struct can_frame *cf)
 971 {
 972         struct kvaser_usb *dev = priv->dev;
 973         struct net_device_stats *stats = &priv->netdev->stats;
 974         enum can_state cur_state, new_state, tx_state, rx_state;
 975
 976         netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status);
 977
 978         new_state = priv->can.state;
 979         cur_state = priv->can.state;
 980
 981         if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
 982                 new_state = CAN_STATE_BUS_OFF;
 983         } else if (es->status & M16C_STATE_BUS_PASSIVE) {
 984                 new_state = CAN_STATE_ERROR_PASSIVE;
 985         } else if ((es->status & M16C_STATE_BUS_ERROR) &&
 986                    cur_state >= CAN_STATE_BUS_OFF) {
 987                 /* Guard against spurious error events after a busoff */
 988         } else if (es->txerr >= 128 || es->rxerr >= 128) {
 989                 new_state = CAN_STATE_ERROR_PASSIVE;
 990         } else if (es->txerr >= 96 || es->rxerr >= 96) {
 991                 new_state = CAN_STATE_ERROR_WARNING;
 992         } else {
 993                 new_state = CAN_STATE_ERROR_ACTIVE;
 994         }
 995
 996         if (new_state != cur_state) {
 997                 tx_state = (es->txerr >= es->rxerr) ? new_state : 0;
 998                 rx_state = (es->txerr <= es->rxerr) ? new_state : 0;
 999
1000                 can_change_state(priv->netdev, cf, tx_state, rx_state);
1001         }
1002
1003         if (priv->can.restart_ms &&
1004             cur_state == CAN_STATE_BUS_OFF &&
1005             new_state < CAN_STATE_BUS_OFF)
1006                 priv->can.can_stats.restarts++;
1007
1008         switch (dev->driver_info->family) {
1009         case KVASER_LEAF:
1010                 if (es->leaf.error_factor) {
1011                         priv->can.can_stats.bus_error++;
1012                         stats->rx_errors++;
1013                 }
1014                 break;
1015         case KVASER_USBCAN:
1016                 if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR)
1017                         stats->tx_errors++;
1018                 if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR)
1019                         stats->rx_errors++;
1020                 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
1021                         priv->can.can_stats.bus_error++;
1022                 break;
1023         }
1024
1025         priv->bec.txerr = es->txerr;
1026         priv->bec.rxerr = es->rxerr;
1027 }
1028
1029 static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev,
1030                                      const struct kvaser_usb_err_summary *es)
1031 {
1032         struct can_frame *cf;
1033         struct can_frame tmp_cf = { .can_id = CAN_ERR_FLAG,
1034                                     .can_dlc = CAN_ERR_DLC };
1035         struct sk_buff *skb;
1036         struct net_device_stats *stats;
1037         struct kvaser_usb_net_priv *priv;
1038         struct kvaser_usb_net_leaf_priv *leaf;
1039         enum can_state old_state, new_state;
1040
1041         if (es->channel >= dev->nchannels) {
1042                 dev_err(&dev->intf->dev,
1043                         "Invalid channel number (%d)\n", es->channel);
1044                 return;
1045         }
1046
1047         priv = dev->nets[es->channel];
1048         leaf = priv->sub_priv;
1049         stats = &priv->netdev->stats;
1050
1051         /* Ignore e.g. state change to bus-off reported just after stopping */
1052         if (!netif_running(priv->netdev))
1053                 return;
1054
1055         /* Update all of the CAN interface's state and error counters before
1056          * trying any memory allocation that can actually fail with -ENOMEM.
1057          *
1058          * We send a temporary stack-allocated error CAN frame to
1059          * can_change_state() for the very same reason.
1060          *
1061          * TODO: Split can_change_state() responsibility between updating the
1062          * CAN interface's state and counters, and the setting up of CAN error
1063          * frame ID and data to userspace. Remove stack allocation afterwards.
1064          */
1065         old_state = priv->can.state;
1066         kvaser_usb_leaf_rx_error_update_can_state(priv, es, &tmp_cf);
1067         new_state = priv->can.state;
1068
1069         /* If there are errors, request status updates periodically as we do
1070          * not get automatic notifications of improved state.
1071          */
1072         if (new_state < CAN_STATE_BUS_OFF &&
1073             (es->rxerr || es->txerr || new_state == CAN_STATE_ERROR_PASSIVE))
1074                 schedule_delayed_work(&leaf->chip_state_req_work,
1075                                       msecs_to_jiffies(500));
1076
1077         skb = alloc_can_err_skb(priv->netdev, &cf);
1078         if (!skb) {
1079                 stats->rx_dropped++;
1080                 return;
1081         }
1082         memcpy(cf, &tmp_cf, sizeof(*cf));
1083
1084         if (new_state != old_state) {
1085                 if (es->status &
1086                     (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
1087                         if (!priv->can.restart_ms)
1088                                 kvaser_usb_leaf_simple_cmd_async(priv,
1089                                                                  CMD_STOP_CHIP);
1090                         netif_carrier_off(priv->netdev);
1091                 }
1092
1093                 if (priv->can.restart_ms &&
1094                     old_state == CAN_STATE_BUS_OFF &&
1095                     new_state < CAN_STATE_BUS_OFF) {
1096                         cf->can_id |= CAN_ERR_RESTARTED;
1097                         netif_carrier_on(priv->netdev);
1098                 }
1099         }
1100
1101         switch (dev->driver_info->family) {
1102         case KVASER_LEAF:
1103                 if (es->leaf.error_factor) {
1104                         cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;
1105
1106                         if (es->leaf.error_factor & M16C_EF_ACKE)
1107                                 cf->data[3] = CAN_ERR_PROT_LOC_ACK;
1108                         if (es->leaf.error_factor & M16C_EF_CRCE)
1109                                 cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
1110                         if (es->leaf.error_factor & M16C_EF_FORME)
1111                                 cf->data[2] |= CAN_ERR_PROT_FORM;
1112                         if (es->leaf.error_factor & M16C_EF_STFE)
1113                                 cf->data[2] |= CAN_ERR_PROT_STUFF;
1114                         if (es->leaf.error_factor & M16C_EF_BITE0)
1115                                 cf->data[2] |= CAN_ERR_PROT_BIT0;
1116                         if (es->leaf.error_factor & M16C_EF_BITE1)
1117                                 cf->data[2] |= CAN_ERR_PROT_BIT1;
1118                         if (es->leaf.error_factor & M16C_EF_TRE)
1119                                 cf->data[2] |= CAN_ERR_PROT_TX;
1120                 }
1121                 break;
1122         case KVASER_USBCAN:
1123                 if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
1124                         cf->can_id |= CAN_ERR_BUSERROR;
1125                 break;
1126         }
1127
1128         if (new_state != CAN_STATE_BUS_OFF) {
1129                 cf->data[6] = es->txerr;
1130                 cf->data[7] = es->rxerr;
1131         }
1132
1133         stats->rx_packets++;
1134         stats->rx_bytes += cf->can_dlc;
1135         netif_rx(skb);
1136 }
1137
1138 /* For USBCAN, report error to userspace if the channels's errors counter
1139  * has changed, or we're the only channel seeing a bus error state.
1140  */
1141 static void
1142 kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev,
1143                                               struct kvaser_usb_err_summary *es)
1144 {
1145         struct kvaser_usb_net_priv *priv;
1146         unsigned int channel;
1147         bool report_error;
1148
1149         channel = es->channel;
1150         if (channel >= dev->nchannels) {
1151                 dev_err(&dev->intf->dev,
1152                         "Invalid channel number (%d)\n", channel);
1153                 return;
1154         }
1155
1156         priv = dev->nets[channel];
1157         report_error = false;
1158
1159         if (es->txerr != priv->bec.txerr) {
1160                 es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR;
1161                 report_error = true;
1162         }
1163         if (es->rxerr != priv->bec.rxerr) {
1164                 es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR;
1165                 report_error = true;
1166         }
1167         if ((es->status & M16C_STATE_BUS_ERROR) &&
1168             !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) {
1169                 es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR;
1170                 report_error = true;
1171         }
1172
1173         if (report_error)
1174                 kvaser_usb_leaf_rx_error(dev, es);
1175 }
1176
1177 static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev,
1178                                             const struct kvaser_cmd *cmd)
1179 {
1180         struct kvaser_usb_err_summary es = { };
1181
1182         switch (cmd->id) {
1183         /* Sometimes errors are sent as unsolicited chip state events */
1184         case CMD_CHIP_STATE_EVENT:
1185                 es.channel = cmd->u.usbcan.chip_state_event.channel;
1186                 es.status = cmd->u.usbcan.chip_state_event.status;
1187                 es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count;
1188                 es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count;
1189                 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1190                 break;
1191
1192         case CMD_CAN_ERROR_EVENT:
1193                 es.channel = 0;
1194                 es.status = cmd->u.usbcan.can_error_event.status_ch0;
1195                 es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch0;
1196                 es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch0;
1197                 es.usbcan.other_ch_status =
1198                         cmd->u.usbcan.can_error_event.status_ch1;
1199                 kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1200
1201                 /* The USBCAN firmware supports up to 2 channels.
1202                  * Now that ch0 was checked, check if ch1 has any errors.
1203                  */
1204                 if (dev->nchannels == MAX_USBCAN_NET_DEVICES) {
1205                         es.channel = 1;
1206                         es.status = cmd->u.usbcan.can_error_event.status_ch1;
1207                         es.txerr =
1208                                 cmd->u.usbcan.can_error_event.tx_errors_count_ch1;
1209                         es.rxerr =
1210                                 cmd->u.usbcan.can_error_event.rx_errors_count_ch1;
1211                         es.usbcan.other_ch_status =
1212                                 cmd->u.usbcan.can_error_event.status_ch0;
1213                         kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
1214                 }
1215                 break;
1216
1217         default:
1218                 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
1219         }
1220 }
1221
1222 static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev,
1223                                           const struct kvaser_cmd *cmd)
1224 {
1225         struct kvaser_usb_err_summary es = { };
1226
1227         switch (cmd->id) {
1228         case CMD_CAN_ERROR_EVENT:
1229                 es.channel = cmd->u.leaf.can_error_event.channel;
1230                 es.status = cmd->u.leaf.can_error_event.status;
1231                 es.txerr = cmd->u.leaf.can_error_event.tx_errors_count;
1232                 es.rxerr = cmd->u.leaf.can_error_event.rx_errors_count;
1233                 es.leaf.error_factor = cmd->u.leaf.can_error_event.error_factor;
1234                 break;
1235         case CMD_LEAF_LOG_MESSAGE:
1236                 es.channel = cmd->u.leaf.log_message.channel;
1237                 es.status = cmd->u.leaf.log_message.data[0];
1238                 es.txerr = cmd->u.leaf.log_message.data[2];
1239                 es.rxerr = cmd->u.leaf.log_message.data[3];
1240                 es.leaf.error_factor = cmd->u.leaf.log_message.data[1];
1241                 break;
1242         case CMD_CHIP_STATE_EVENT:
1243                 es.channel = cmd->u.leaf.chip_state_event.channel;
1244                 es.status = cmd->u.leaf.chip_state_event.status;
1245                 es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count;
1246                 es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count;
1247                 es.leaf.error_factor = 0;
1248                 break;
1249         default:
1250                 dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
1251                 return;
1252         }
1253
1254         kvaser_usb_leaf_rx_error(dev, &es);
1255 }
1256
1257 static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv,
1258                                        const struct kvaser_cmd *cmd)
1259 {
1260         if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1261                                          MSG_FLAG_NERR)) {
1262                 struct net_device_stats *stats = &priv->netdev->stats;
1263
1264                 netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n",
1265                            cmd->u.rx_can_header.flag);
1266
1267                 stats->rx_errors++;
1268                 return;
1269         }
1270
1271         if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN)
1272                 kvaser_usb_can_rx_over_error(priv->netdev);
1273 }
1274
1275 static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
1276                                        const struct kvaser_cmd *cmd)
1277 {
1278         struct kvaser_usb_net_priv *priv;
1279         struct can_frame *cf;
1280         struct sk_buff *skb;
1281         struct net_device_stats *stats;
1282         u8 channel = cmd->u.rx_can_header.channel;
1283         const u8 *rx_data = NULL;       /* GCC */
1284
1285         if (channel >= dev->nchannels) {
1286                 dev_err(&dev->intf->dev,
1287                         "Invalid channel number (%d)\n", channel);
1288                 return;
1289         }
1290
1291         priv = dev->nets[channel];
1292         stats = &priv->netdev->stats;
1293
1294         if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) &&
1295             (dev->driver_info->family == KVASER_LEAF &&
1296              cmd->id == CMD_LEAF_LOG_MESSAGE)) {
1297                 kvaser_usb_leaf_leaf_rx_error(dev, cmd);
1298                 return;
1299         } else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
1300                                                 MSG_FLAG_NERR |
1301                                                 MSG_FLAG_OVERRUN)) {
1302                 kvaser_usb_leaf_rx_can_err(priv, cmd);
1303                 return;
1304         } else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) {
1305                 netdev_warn(priv->netdev,
1306                             "Unhandled frame (flags: 0x%02x)\n",
1307                             cmd->u.rx_can_header.flag);
1308                 return;
1309         }
1310
1311         switch (dev->driver_info->family) {
1312         case KVASER_LEAF:
1313                 rx_data = cmd->u.leaf.rx_can.data;
1314                 break;
1315         case KVASER_USBCAN:
1316                 rx_data = cmd->u.usbcan.rx_can.data;
1317                 break;
1318         }
1319
1320         skb = alloc_can_skb(priv->netdev, &cf);
1321         if (!skb) {
1322                 stats->rx_dropped++;
1323                 return;
1324         }
1325
1326         if (dev->driver_info->family == KVASER_LEAF && cmd->id ==
1327             CMD_LEAF_LOG_MESSAGE) {
1328                 cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id);
1329                 if (cf->can_id & KVASER_EXTENDED_FRAME)
1330                         cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
1331                 else
1332                         cf->can_id &= CAN_SFF_MASK;
1333
1334                 cf->can_dlc = get_can_dlc(cmd->u.leaf.log_message.dlc);
1335
1336                 if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME)
1337                         cf->can_id |= CAN_RTR_FLAG;
1338                 else
1339                         memcpy(cf->data, &cmd->u.leaf.log_message.data,
1340                                cf->can_dlc);
1341         } else {
1342                 cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f);
1343
1344                 if (cmd->id == CMD_RX_EXT_MESSAGE) {
1345                         cf->can_id <<= 18;
1346                         cf->can_id |= ((rx_data[2] & 0x0f) << 14) |
1347                                       ((rx_data[3] & 0xff) << 6) |
1348                                       (rx_data[4] & 0x3f);
1349                         cf->can_id |= CAN_EFF_FLAG;
1350                 }
1351
1352                 cf->can_dlc = get_can_dlc(rx_data[5]);
1353
1354                 if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME)
1355                         cf->can_id |= CAN_RTR_FLAG;
1356                 else
1357                         memcpy(cf->data, &rx_data[6], cf->can_dlc);
1358         }
1359
1360         stats->rx_packets++;
1361         stats->rx_bytes += cf->can_dlc;
1362         netif_rx(skb);
1363 }
1364
1365 static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev,
1366                                                   const struct kvaser_cmd *cmd)
1367 {
1368         u16 info1 = 0;
1369
1370         switch (dev->driver_info->family) {
1371         case KVASER_LEAF:
1372                 info1 = le16_to_cpu(cmd->u.leaf.error_event.info1);
1373                 break;
1374         case KVASER_USBCAN:
1375                 info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1);
1376                 break;
1377         }
1378
1379         /* info1 will contain the offending cmd_no */
1380         switch (info1) {
1381         case CMD_SET_CTRL_MODE:
1382                 dev_warn(&dev->intf->dev,
1383                          "CMD_SET_CTRL_MODE error in parameter\n");
1384                 break;
1385
1386         case CMD_SET_BUS_PARAMS:
1387                 dev_warn(&dev->intf->dev,
1388                          "CMD_SET_BUS_PARAMS error in parameter\n");
1389                 break;
1390
1391         default:
1392                 dev_warn(&dev->intf->dev,
1393                          "Unhandled parameter error event cmd_no (%u)\n",
1394                          info1);
1395                 break;
1396         }
1397 }
1398
1399 static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev,
1400                                         const struct kvaser_cmd *cmd)
1401 {
1402         u8 error_code = 0;
1403
1404         switch (dev->driver_info->family) {
1405         case KVASER_LEAF:
1406                 error_code = cmd->u.leaf.error_event.error_code;
1407                 break;
1408         case KVASER_USBCAN:
1409                 error_code = cmd->u.usbcan.error_event.error_code;
1410                 break;
1411         }
1412
1413         switch (error_code) {
1414         case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL:
1415                 /* Received additional CAN message, when firmware TX queue is
1416                  * already full. Something is wrong with the driver.
1417                  * This should never happen!
1418                  */
1419                 dev_err(&dev->intf->dev,
1420                         "Received error event TX_QUEUE_FULL\n");
1421                 break;
1422         case KVASER_USB_LEAF_ERROR_EVENT_PARAM:
1423                 kvaser_usb_leaf_error_event_parameter(dev, cmd);
1424                 break;
1425
1426         default:
1427                 dev_warn(&dev->intf->dev,
1428                          "Unhandled error event (%d)\n", error_code);
1429                 break;
1430         }
1431 }
1432
1433 static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev,
1434                                              const struct kvaser_cmd *cmd)
1435 {
1436         struct kvaser_usb_net_priv *priv;
1437         u8 channel = cmd->u.simple.channel;
1438
1439         if (channel >= dev->nchannels) {
1440                 dev_err(&dev->intf->dev,
1441                         "Invalid channel number (%d)\n", channel);
1442                 return;
1443         }
1444
1445         priv = dev->nets[channel];
1446
1447         if (completion_done(&priv->start_comp) &&
1448             netif_queue_stopped(priv->netdev)) {
1449                 netif_wake_queue(priv->netdev);
1450         } else {
1451                 netif_start_queue(priv->netdev);
1452                 complete(&priv->start_comp);
1453         }
1454 }
1455
1456 static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev,
1457                                             const struct kvaser_cmd *cmd)
1458 {
1459         struct kvaser_usb_net_priv *priv;
1460         u8 channel = cmd->u.simple.channel;
1461
1462         if (channel >= dev->nchannels) {
1463                 dev_err(&dev->intf->dev,
1464                         "Invalid channel number (%d)\n", channel);
1465                 return;
1466         }
1467
1468         priv = dev->nets[channel];
1469
1470         complete(&priv->stop_comp);
1471 }
1472
1473 static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev,
1474                                                 const struct kvaser_cmd *cmd)
1475 {
1476         struct kvaser_usb_net_priv *priv;
1477         u8 channel = cmd->u.busparams.channel;
1478
1479         if (channel >= dev->nchannels) {
1480                 dev_err(&dev->intf->dev,
1481                         "Invalid channel number (%d)\n", channel);
1482                 return;
1483         }
1484
1485         priv = dev->nets[channel];
1486         memcpy(&priv->busparams_nominal, &cmd->u.busparams.busparams,
1487                sizeof(priv->busparams_nominal));
1488
1489         complete(&priv->get_busparams_comp);
1490 }
1491
1492 static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev,
1493                                            const struct kvaser_cmd *cmd)
1494 {
1495         if (kvaser_usb_leaf_verify_size(dev, cmd) < 0)
1496                 return;
1497
1498         switch (cmd->id) {
1499         case CMD_START_CHIP_REPLY:
1500                 kvaser_usb_leaf_start_chip_reply(dev, cmd);
1501                 break;
1502
1503         case CMD_STOP_CHIP_REPLY:
1504                 kvaser_usb_leaf_stop_chip_reply(dev, cmd);
1505                 break;
1506
1507         case CMD_RX_STD_MESSAGE:
1508         case CMD_RX_EXT_MESSAGE:
1509                 kvaser_usb_leaf_rx_can_msg(dev, cmd);
1510                 break;
1511
1512         case CMD_LEAF_LOG_MESSAGE:
1513                 if (dev->driver_info->family != KVASER_LEAF)
1514                         goto warn;
1515                 kvaser_usb_leaf_rx_can_msg(dev, cmd);
1516                 break;
1517
1518         case CMD_CHIP_STATE_EVENT:
1519         case CMD_CAN_ERROR_EVENT:
1520                 if (dev->driver_info->family == KVASER_LEAF)
1521                         kvaser_usb_leaf_leaf_rx_error(dev, cmd);
1522                 else
1523                         kvaser_usb_leaf_usbcan_rx_error(dev, cmd);
1524                 break;
1525
1526         case CMD_TX_ACKNOWLEDGE:
1527                 kvaser_usb_leaf_tx_acknowledge(dev, cmd);
1528                 break;
1529
1530         case CMD_ERROR_EVENT:
1531                 kvaser_usb_leaf_error_event(dev, cmd);
1532                 break;
1533
1534         case CMD_GET_BUS_PARAMS_REPLY:
1535                 kvaser_usb_leaf_get_busparams_reply(dev, cmd);
1536                 break;
1537
1538         /* Ignored commands */
1539         case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:
1540                 if (dev->driver_info->family != KVASER_USBCAN)
1541                         goto warn;
1542                 break;
1543
1544         case CMD_FLUSH_QUEUE_REPLY:
1545                 if (dev->driver_info->family != KVASER_LEAF)
1546                         goto warn;
1547                 break;
1548
1549         default:
1550 warn:           dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id);
1551                 break;
1552         }
1553 }
1554
1555 static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev,
1556                                                void *buf, int len)
1557 {
1558         struct kvaser_cmd *cmd;
1559         int pos = 0;
1560
1561         while (pos <= len - CMD_HEADER_LEN) {
1562                 cmd = buf + pos;
1563
1564                 /* The Kvaser firmware can only read and write commands that
1565                  * does not cross the USB's endpoint wMaxPacketSize boundary.
1566                  * If a follow-up command crosses such boundary, firmware puts
1567                  * a placeholder zero-length command in its place then aligns
1568                  * the real command to the next max packet size.
1569                  *
1570                  * Handle such cases or we're going to miss a significant
1571                  * number of events in case of a heavy rx load on the bus.
1572                  */
1573                 if (cmd->len == 0) {
1574                         pos = round_up(pos, le16_to_cpu
1575                                                 (dev->bulk_in->wMaxPacketSize));
1576                         continue;
1577                 }
1578
1579                 if (pos + cmd->len > len) {
1580                         dev_err_ratelimited(&dev->intf->dev, "Format error\n");
1581                         break;
1582                 }
1583
1584                 kvaser_usb_leaf_handle_command(dev, cmd);
1585                 pos += cmd->len;
1586         }
1587 }
1588
1589 static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv)
1590 {
1591         struct kvaser_cmd *cmd;
1592         int rc;
1593
1594         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1595         if (!cmd)
1596                 return -ENOMEM;
1597
1598         cmd->id = CMD_SET_CTRL_MODE;
1599         cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode);
1600         cmd->u.ctrl_mode.tid = 0xff;
1601         cmd->u.ctrl_mode.channel = priv->channel;
1602
1603         if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
1604                 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
1605         else
1606                 cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
1607
1608         rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
1609
1610         kfree(cmd);
1611         return rc;
1612 }
1613
1614 static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv)
1615 {
1616         int err;
1617
1618         reinit_completion(&priv->start_comp);
1619
1620         err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP,
1621                                               priv->channel);
1622         if (err)
1623                 return err;
1624
1625         if (!wait_for_completion_timeout(&priv->start_comp,
1626                                          msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1627                 return -ETIMEDOUT;
1628
1629         return 0;
1630 }
1631
1632 static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv)
1633 {
1634         struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1635         int err;
1636
1637         reinit_completion(&priv->stop_comp);
1638
1639         cancel_delayed_work(&leaf->chip_state_req_work);
1640
1641         err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP,
1642                                               priv->channel);
1643         if (err)
1644                 return err;
1645
1646         if (!wait_for_completion_timeout(&priv->stop_comp,
1647                                          msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1648                 return -ETIMEDOUT;
1649
1650         return 0;
1651 }
1652
1653 static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel)
1654 {
1655         return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel);
1656 }
1657
1658 static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv)
1659 {
1660         struct kvaser_cmd *cmd;
1661         int rc;
1662
1663         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1664         if (!cmd)
1665                 return -ENOMEM;
1666
1667         cmd->id = CMD_FLUSH_QUEUE;
1668         cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue);
1669         cmd->u.flush_queue.channel = priv->channel;
1670         cmd->u.flush_queue.flags = 0x00;
1671
1672         rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
1673
1674         kfree(cmd);
1675         return rc;
1676 }
1677
1678 static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev)
1679 {
1680         struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
1681
1682         card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
1683
1684         return 0;
1685 }
1686
1687 static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv)
1688 {
1689         struct kvaser_usb_net_leaf_priv *leaf;
1690
1691         leaf = devm_kzalloc(&priv->dev->intf->dev, sizeof(*leaf), GFP_KERNEL);
1692         if (!leaf)
1693                 return -ENOMEM;
1694
1695         leaf->net = priv;
1696         INIT_DELAYED_WORK(&leaf->chip_state_req_work,
1697                           kvaser_usb_leaf_chip_state_req_work);
1698
1699         priv->sub_priv = leaf;
1700
1701         return 0;
1702 }
1703
1704 static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv)
1705 {
1706         struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
1707
1708         if (leaf)
1709                 cancel_delayed_work_sync(&leaf->chip_state_req_work);
1710 }
1711
1712 static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev,
1713                                          const struct kvaser_usb_busparams *busparams)
1714 {
1715         struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1716         struct kvaser_usb *dev = priv->dev;
1717         struct kvaser_cmd *cmd;
1718         int rc;
1719
1720         cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
1721         if (!cmd)
1722                 return -ENOMEM;
1723
1724         cmd->id = CMD_SET_BUS_PARAMS;
1725         cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams);
1726         cmd->u.busparams.channel = priv->channel;
1727         cmd->u.busparams.tid = 0xff;
1728         memcpy(&cmd->u.busparams.busparams, busparams,
1729                sizeof(cmd->u.busparams.busparams));
1730
1731         rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
1732
1733         kfree(cmd);
1734         return rc;
1735 }
1736
1737 static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv)
1738 {
1739         int err;
1740
1741         if (priv->dev->driver_info->family == KVASER_USBCAN)
1742                 return -EOPNOTSUPP;
1743
1744         reinit_completion(&priv->get_busparams_comp);
1745
1746         err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_GET_BUS_PARAMS,
1747                                               priv->channel);
1748         if (err)
1749                 return err;
1750
1751         if (!wait_for_completion_timeout(&priv->get_busparams_comp,
1752                                          msecs_to_jiffies(KVASER_USB_TIMEOUT)))
1753                 return -ETIMEDOUT;
1754
1755         return 0;
1756 }
1757
1758 static int kvaser_usb_leaf_set_mode(struct net_device *netdev,
1759                                     enum can_mode mode)
1760 {
1761         struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1762         int err;
1763
1764         switch (mode) {
1765         case CAN_MODE_START:
1766                 kvaser_usb_unlink_tx_urbs(priv);
1767
1768                 err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP);
1769                 if (err)
1770                         return err;
1771
1772                 priv->can.state = CAN_STATE_ERROR_ACTIVE;
1773                 break;
1774         default:
1775                 return -EOPNOTSUPP;
1776         }
1777
1778         return 0;
1779 }
1780
1781 static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev,
1782                                             struct can_berr_counter *bec)
1783 {
1784         struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
1785
1786         *bec = priv->bec;
1787
1788         return 0;
1789 }
1790
1791 static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev)
1792 {
1793         const struct usb_host_interface *iface_desc;
1794         struct usb_endpoint_descriptor *endpoint;
1795         int i;
1796
1797         iface_desc = dev->intf->cur_altsetting;
1798
1799         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1800                 endpoint = &iface_desc->endpoint[i].desc;
1801
1802                 if (!dev->bulk_in && usb_endpoint_is_bulk_in(endpoint))
1803                         dev->bulk_in = endpoint;
1804
1805                 if (!dev->bulk_out && usb_endpoint_is_bulk_out(endpoint))
1806                         dev->bulk_out = endpoint;
1807
1808                 /* use first bulk endpoint for in and out */
1809                 if (dev->bulk_in && dev->bulk_out)
1810                         return 0;
1811         }
1812
1813         return -ENODEV;
1814 }
1815
1816 const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = {
1817         .dev_set_mode = kvaser_usb_leaf_set_mode,
1818         .dev_set_bittiming = kvaser_usb_leaf_set_bittiming,
1819         .dev_get_busparams = kvaser_usb_leaf_get_busparams,
1820         .dev_set_data_bittiming = NULL,
1821         .dev_get_data_busparams = NULL,
1822         .dev_get_berr_counter = kvaser_usb_leaf_get_berr_counter,
1823         .dev_setup_endpoints = kvaser_usb_leaf_setup_endpoints,
1824         .dev_init_card = kvaser_usb_leaf_init_card,
1825         .dev_init_channel = kvaser_usb_leaf_init_channel,
1826         .dev_remove_channel = kvaser_usb_leaf_remove_channel,
1827         .dev_get_software_info = kvaser_usb_leaf_get_software_info,
1828         .dev_get_software_details = NULL,
1829         .dev_get_card_info = kvaser_usb_leaf_get_card_info,
1830         .dev_get_capabilities = kvaser_usb_leaf_get_capabilities,
1831         .dev_set_opt_mode = kvaser_usb_leaf_set_opt_mode,
1832         .dev_start_chip = kvaser_usb_leaf_start_chip,
1833         .dev_stop_chip = kvaser_usb_leaf_stop_chip,
1834         .dev_reset_chip = kvaser_usb_leaf_reset_chip,
1835         .dev_flush_queue = kvaser_usb_leaf_flush_queue,
1836         .dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback,
1837         .dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd,
1838 };