LXR linux/drivers/net/can/usb/peak_usb/pcan_usb

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
   4 *
   5 * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
   6 */
   7#include <linux/netdevice.h>
   8#include <linux/usb.h>
   9#include <linux/module.h>
  10
  11#include <linux/can.h>
  12#include <linux/can/dev.h>
  13#include <linux/can/error.h>
  14#include <linux/can/dev/peak_canfd.h>
  15
  16#include "pcan_usb_core.h"
  17#include "pcan_usb_pro.h"
  18
  19MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter");
  20MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
  21
  22#define PCAN_USBPROFD_CHANNEL_COUNT     2
  23#define PCAN_USBFD_CHANNEL_COUNT        1
  24
  25/* PCAN-USB Pro FD adapter internal clock (Hz) */
  26#define PCAN_UFD_CRYSTAL_HZ             80000000
  27
  28#define PCAN_UFD_CMD_BUFFER_SIZE        512
  29#define PCAN_UFD_LOSPD_PKT_SIZE         64
  30
  31/* PCAN-USB Pro FD command timeout (ms.) */
  32#define PCAN_UFD_CMD_TIMEOUT_MS         1000
  33
  34/* PCAN-USB Pro FD rx/tx buffers size */
  35#define PCAN_UFD_RX_BUFFER_SIZE         2048
  36#define PCAN_UFD_TX_BUFFER_SIZE         512
  37
  38/* read some versions info from the hw devcie */
  39struct __packed pcan_ufd_fw_info {
  40        __le16  size_of;        /* sizeof this */
  41        __le16  type;           /* type of this structure */
  42        u8      hw_type;        /* Type of hardware (HW_TYPE_xxx) */
  43        u8      bl_version[3];  /* Bootloader version */
  44        u8      hw_version;     /* Hardware version (PCB) */
  45        u8      fw_version[3];  /* Firmware version */
  46        __le32  dev_id[2];      /* "device id" per CAN */
  47        __le32  ser_no;         /* S/N */
  48        __le32  flags;          /* special functions */
  49};
  50
  51/* handle device specific info used by the netdevices */
  52struct pcan_usb_fd_if {
  53        struct peak_usb_device  *dev[PCAN_USB_MAX_CHANNEL];
  54        struct pcan_ufd_fw_info fw_info;
  55        struct peak_time_ref    time_ref;
  56        int                     cm_ignore_count;
  57        int                     dev_opened_count;
  58};
  59
  60/* device information */
  61struct pcan_usb_fd_device {
  62        struct peak_usb_device  dev;
  63        struct can_berr_counter bec;
  64        struct pcan_usb_fd_if   *usb_if;
  65        u8                      *cmd_buffer_addr;
  66};
  67
  68/* Extended USB commands (non uCAN commands) */
  69
  70/* Clock Modes command */
  71#define PCAN_UFD_CMD_CLK_SET            0x80
  72
  73#define PCAN_UFD_CLK_80MHZ              0x0
  74#define PCAN_UFD_CLK_60MHZ              0x1
  75#define PCAN_UFD_CLK_40MHZ              0x2
  76#define PCAN_UFD_CLK_30MHZ              0x3
  77#define PCAN_UFD_CLK_24MHZ              0x4
  78#define PCAN_UFD_CLK_20MHZ              0x5
  79#define PCAN_UFD_CLK_DEF                PCAN_UFD_CLK_80MHZ
  80
  81struct __packed pcan_ufd_clock {
  82        __le16  opcode_channel;
  83
  84        u8      mode;
  85        u8      unused[5];
  86};
  87
  88/* LED control command */
  89#define PCAN_UFD_CMD_LED_SET            0x86
  90
  91#define PCAN_UFD_LED_DEV                0x00
  92#define PCAN_UFD_LED_FAST               0x01
  93#define PCAN_UFD_LED_SLOW               0x02
  94#define PCAN_UFD_LED_ON                 0x03
  95#define PCAN_UFD_LED_OFF                0x04
  96#define PCAN_UFD_LED_DEF                PCAN_UFD_LED_DEV
  97
  98struct __packed pcan_ufd_led {
  99        __le16  opcode_channel;
 100
 101        u8      mode;
 102        u8      unused[5];
 103};
 104
 105/* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
 106#define PCAN_UFD_FLTEXT_CALIBRATION     0x8000
 107
 108struct __packed pcan_ufd_options {
 109        __le16  opcode_channel;
 110
 111        __le16  ucan_mask;
 112        u16     unused;
 113        __le16  usb_mask;
 114};
 115
 116/* Extended usage of uCAN messages for PCAN-USB Pro FD */
 117#define PCAN_UFD_MSG_CALIBRATION        0x100
 118
 119struct __packed pcan_ufd_ts_msg {
 120        __le16  size;
 121        __le16  type;
 122        __le32  ts_low;
 123        __le32  ts_high;
 124        __le16  usb_frame_index;
 125        u16     unused;
 126};
 127
 128#define PCAN_UFD_MSG_OVERRUN            0x101
 129
 130#define PCAN_UFD_OVMSG_CHANNEL(o)       ((o)->channel & 0xf)
 131
 132struct __packed pcan_ufd_ovr_msg {
 133        __le16  size;
 134        __le16  type;
 135        __le32  ts_low;
 136        __le32  ts_high;
 137        u8      channel;
 138        u8      unused[3];
 139};
 140
 141static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
 142{
 143        return om->channel & 0xf;
 144}
 145
 146/* Clock mode frequency values */
 147static const u32 pcan_usb_fd_clk_freq[6] = {
 148        [PCAN_UFD_CLK_80MHZ] = 80000000,
 149        [PCAN_UFD_CLK_60MHZ] = 60000000,
 150        [PCAN_UFD_CLK_40MHZ] = 40000000,
 151        [PCAN_UFD_CLK_30MHZ] = 30000000,
 152        [PCAN_UFD_CLK_24MHZ] = 24000000,
 153        [PCAN_UFD_CLK_20MHZ] = 20000000
 154};
 155
 156/* return a device USB interface */
 157static inline
 158struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
 159{
 160        struct pcan_usb_fd_device *pdev =
 161                        container_of(dev, struct pcan_usb_fd_device, dev);
 162        return pdev->usb_if;
 163}
 164
 165/* return a device USB commands buffer */
 166static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
 167{
 168        struct pcan_usb_fd_device *pdev =
 169                        container_of(dev, struct pcan_usb_fd_device, dev);
 170        return pdev->cmd_buffer_addr;
 171}
 172
 173/* send PCAN-USB Pro FD commands synchronously */
 174static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
 175{
 176        void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
 177        int err = 0;
 178        u8 *packet_ptr;
 179        int packet_len;
 180        ptrdiff_t cmd_len;
 181
 182        /* usb device unregistered? */
 183        if (!(dev->state & PCAN_USB_STATE_CONNECTED))
 184                return 0;
 185
 186        /* if a packet is not filled completely by commands, the command list
 187         * is terminated with an "end of collection" record.
 188         */
 189        cmd_len = cmd_tail - cmd_head;
 190        if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
 191                memset(cmd_tail, 0xff, sizeof(u64));
 192                cmd_len += sizeof(u64);
 193        }
 194
 195        packet_ptr = cmd_head;
 196        packet_len = cmd_len;
 197
 198        /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
 199        if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
 200                packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
 201
 202        do {
 203                err = usb_bulk_msg(dev->udev,
 204                                   usb_sndbulkpipe(dev->udev,
 205                                                   PCAN_USBPRO_EP_CMDOUT),
 206                                   packet_ptr, packet_len,
 207                                   NULL, PCAN_UFD_CMD_TIMEOUT_MS);
 208                if (err) {
 209                        netdev_err(dev->netdev,
 210                                   "sending command failure: %d\n", err);
 211                        break;
 212                }
 213
 214                packet_ptr += packet_len;
 215                cmd_len -= packet_len;
 216
 217                if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
 218                        packet_len = cmd_len;
 219
 220        } while (packet_len > 0);
 221
 222        return err;
 223}
 224
 225/* build the commands list in the given buffer, to enter operational mode */
 226static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
 227{
 228        struct pucan_wr_err_cnt *prc;
 229        struct pucan_command *cmd;
 230        u8 *pc = buf;
 231
 232        /* 1st, reset error counters: */
 233        prc = (struct pucan_wr_err_cnt *)pc;
 234        prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 235                                                       PUCAN_CMD_WR_ERR_CNT);
 236
 237        /* select both counters */
 238        prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
 239
 240        /* and reset their values */
 241        prc->tx_counter = 0;
 242        prc->rx_counter = 0;
 243
 244        /* moves the pointer forward */
 245        pc += sizeof(struct pucan_wr_err_cnt);
 246
 247        /* add command to switch from ISO to non-ISO mode, if fw allows it */
 248        if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
 249                struct pucan_options *puo = (struct pucan_options *)pc;
 250
 251                puo->opcode_channel =
 252                        (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
 253                        pucan_cmd_opcode_channel(dev->ctrl_idx,
 254                                                 PUCAN_CMD_CLR_DIS_OPTION) :
 255                        pucan_cmd_opcode_channel(dev->ctrl_idx,
 256                                                 PUCAN_CMD_SET_EN_OPTION);
 257
 258                puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
 259
 260                /* to be sure that no other extended bits will be taken into
 261                 * account
 262                 */
 263                puo->unused = 0;
 264
 265                /* moves the pointer forward */
 266                pc += sizeof(struct pucan_options);
 267        }
 268
 269        /* next, go back to operational mode */
 270        cmd = (struct pucan_command *)pc;
 271        cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 272                                (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
 273                                                PUCAN_CMD_LISTEN_ONLY_MODE :
 274                                                PUCAN_CMD_NORMAL_MODE);
 275        pc += sizeof(struct pucan_command);
 276
 277        return pc - buf;
 278}
 279
 280/* set CAN bus on/off */
 281static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
 282{
 283        u8 *pc = pcan_usb_fd_cmd_buffer(dev);
 284        int l;
 285
 286        if (onoff) {
 287                /* build the cmds list to enter operational mode */
 288                l = pcan_usb_fd_build_restart_cmd(dev, pc);
 289        } else {
 290                struct pucan_command *cmd = (struct pucan_command *)pc;
 291
 292                /* build cmd to go back to reset mode */
 293                cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 294                                                        PUCAN_CMD_RESET_MODE);
 295                l = sizeof(struct pucan_command);
 296        }
 297
 298        /* send the command */
 299        return pcan_usb_fd_send_cmd(dev, pc + l);
 300}
 301
 302/* set filtering masks:
 303 *
 304 *      idx  in range [0..63] selects a row #idx, all rows otherwise
 305 *      mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
 306 *
 307 *      Each bit of this 64 x 32 bits array defines a CANID value:
 308 *
 309 *      bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
 310 *      bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
 311 */
 312static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
 313                                      u32 mask)
 314{
 315        struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
 316        int i, n;
 317
 318        /* select all rows when idx is out of range [0..63] */
 319        if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
 320                n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
 321                idx = 0;
 322
 323        /* select the row (and only the row) otherwise */
 324        } else {
 325                n = idx + 1;
 326        }
 327
 328        for (i = idx; i < n; i++, cmd++) {
 329                cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 330                                                        PUCAN_CMD_FILTER_STD);
 331                cmd->idx = cpu_to_le16(i);
 332                cmd->mask = cpu_to_le32(mask);
 333        }
 334
 335        /* send the command */
 336        return pcan_usb_fd_send_cmd(dev, cmd);
 337}
 338
 339/* set/unset options
 340 *
 341 *      onoff   set(1)/unset(0) options
 342 *      mask    each bit defines a kind of options to set/unset
 343 */
 344static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
 345                                   bool onoff, u16 ucan_mask, u16 usb_mask)
 346{
 347        struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
 348
 349        cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 350                                        (onoff) ? PUCAN_CMD_SET_EN_OPTION :
 351                                                  PUCAN_CMD_CLR_DIS_OPTION);
 352
 353        cmd->ucan_mask = cpu_to_le16(ucan_mask);
 354        cmd->usb_mask = cpu_to_le16(usb_mask);
 355
 356        /* send the command */
 357        return pcan_usb_fd_send_cmd(dev, ++cmd);
 358}
 359
 360/* setup LED control */
 361static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
 362{
 363        struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
 364
 365        cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 366                                                       PCAN_UFD_CMD_LED_SET);
 367        cmd->mode = led_mode;
 368
 369        /* send the command */
 370        return pcan_usb_fd_send_cmd(dev, ++cmd);
 371}
 372
 373/* set CAN clock domain */
 374static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
 375                                        u8 clk_mode)
 376{
 377        struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
 378
 379        cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 380                                                       PCAN_UFD_CMD_CLK_SET);
 381        cmd->mode = clk_mode;
 382
 383        /* send the command */
 384        return pcan_usb_fd_send_cmd(dev, ++cmd);
 385}
 386
 387/* set bittiming for CAN and CAN-FD header */
 388static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
 389                                          struct can_bittiming *bt)
 390{
 391        struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
 392
 393        cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 394                                                       PUCAN_CMD_TIMING_SLOW);
 395        cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
 396                                dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
 397
 398        cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
 399        cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 400        cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
 401
 402        cmd->ewl = 96;  /* default */
 403
 404        /* send the command */
 405        return pcan_usb_fd_send_cmd(dev, ++cmd);
 406}
 407
 408/* set CAN-FD bittiming for data */
 409static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
 410                                          struct can_bittiming *bt)
 411{
 412        struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
 413
 414        cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
 415                                                       PUCAN_CMD_TIMING_FAST);
 416        cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
 417        cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
 418        cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 419        cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
 420
 421        /* send the command */
 422        return pcan_usb_fd_send_cmd(dev, ++cmd);
 423}
 424
 425/* handle restart but in asynchronously way
 426 * (uses PCAN-USB Pro code to complete asynchronous request)
 427 */
 428static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
 429                                     struct urb *urb, u8 *buf)
 430{
 431        u8 *pc = buf;
 432
 433        /* build the entire cmds list in the provided buffer, to go back into
 434         * operational mode.
 435         */
 436        pc += pcan_usb_fd_build_restart_cmd(dev, pc);
 437
 438        /* add EOC */
 439        memset(pc, 0xff, sizeof(struct pucan_command));
 440        pc += sizeof(struct pucan_command);
 441
 442        /* complete the URB */
 443        usb_fill_bulk_urb(urb, dev->udev,
 444                          usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
 445                          buf, pc - buf,
 446                          pcan_usb_pro_restart_complete, dev);
 447
 448        /* and submit it. */
 449        return usb_submit_urb(urb, GFP_ATOMIC);
 450}
 451
 452static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
 453{
 454        struct pcan_usb_fd_device *pdev =
 455                        container_of(dev, struct pcan_usb_fd_device, dev);
 456
 457        pdev->cmd_buffer_addr[0] = 0;
 458        pdev->cmd_buffer_addr[1] = !!loaded;
 459
 460        return pcan_usb_pro_send_req(dev,
 461                                PCAN_USBPRO_REQ_FCT,
 462                                PCAN_USBPRO_FCT_DRVLD,
 463                                pdev->cmd_buffer_addr,
 464                                PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
 465}
 466
 467static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
 468                                     struct pucan_msg *rx_msg)
 469{
 470        struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
 471        struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)];
 472        struct net_device *netdev = dev->netdev;
 473        struct canfd_frame *cfd;
 474        struct sk_buff *skb;
 475        const u16 rx_msg_flags = le16_to_cpu(rm->flags);
 476
 477        if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
 478                /* CANFD frame case */
 479                skb = alloc_canfd_skb(netdev, &cfd);
 480                if (!skb)
 481                        return -ENOMEM;
 482
 483                if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
 484                        cfd->flags |= CANFD_BRS;
 485
 486                if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
 487                        cfd->flags |= CANFD_ESI;
 488
 489                cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
 490        } else {
 491                /* CAN 2.0 frame case */
 492                skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 493                if (!skb)
 494                        return -ENOMEM;
 495
 496                cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
 497        }
 498
 499        cfd->can_id = le32_to_cpu(rm->can_id);
 500
 501        if (rx_msg_flags & PUCAN_MSG_EXT_ID)
 502                cfd->can_id |= CAN_EFF_FLAG;
 503
 504        if (rx_msg_flags & PUCAN_MSG_RTR)
 505                cfd->can_id |= CAN_RTR_FLAG;
 506        else
 507                memcpy(cfd->data, rm->d, cfd->len);
 508
 509        peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
 510
 511        netdev->stats.rx_packets++;
 512        netdev->stats.rx_bytes += cfd->len;
 513
 514        return 0;
 515}
 516
 517/* handle uCAN status message */
 518static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
 519                                     struct pucan_msg *rx_msg)
 520{
 521        struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
 522        struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
 523        struct pcan_usb_fd_device *pdev =
 524                        container_of(dev, struct pcan_usb_fd_device, dev);
 525        enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 526        enum can_state rx_state, tx_state;
 527        struct net_device *netdev = dev->netdev;
 528        struct can_frame *cf;
 529        struct sk_buff *skb;
 530
 531        /* nothing should be sent while in BUS_OFF state */
 532        if (dev->can.state == CAN_STATE_BUS_OFF)
 533                return 0;
 534
 535        if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
 536                new_state = CAN_STATE_BUS_OFF;
 537        } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
 538                new_state = CAN_STATE_ERROR_PASSIVE;
 539        } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
 540                new_state = CAN_STATE_ERROR_WARNING;
 541        } else {
 542                /* no error bit (so, no error skb, back to active state) */
 543                dev->can.state = CAN_STATE_ERROR_ACTIVE;
 544                pdev->bec.txerr = 0;
 545                pdev->bec.rxerr = 0;
 546                return 0;
 547        }
 548
 549        /* state hasn't changed */
 550        if (new_state == dev->can.state)
 551                return 0;
 552
 553        /* handle bus state change */
 554        tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
 555        rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
 556
 557        /* allocate an skb to store the error frame */
 558        skb = alloc_can_err_skb(netdev, &cf);
 559        if (skb)
 560                can_change_state(netdev, cf, tx_state, rx_state);
 561
 562        /* things must be done even in case of OOM */
 563        if (new_state == CAN_STATE_BUS_OFF)
 564                can_bus_off(netdev);
 565
 566        if (!skb)
 567                return -ENOMEM;
 568
 569        peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
 570
 571        netdev->stats.rx_packets++;
 572        netdev->stats.rx_bytes += cf->can_dlc;
 573
 574        return 0;
 575}
 576
 577/* handle uCAN error message */
 578static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
 579                                    struct pucan_msg *rx_msg)
 580{
 581        struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
 582        struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)];
 583        struct pcan_usb_fd_device *pdev =
 584                        container_of(dev, struct pcan_usb_fd_device, dev);
 585
 586        /* keep a trace of tx and rx error counters for later use */
 587        pdev->bec.txerr = er->tx_err_cnt;
 588        pdev->bec.rxerr = er->rx_err_cnt;
 589
 590        return 0;
 591}
 592
 593/* handle uCAN overrun message */
 594static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
 595                                      struct pucan_msg *rx_msg)
 596{
 597        struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
 598        struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)];
 599        struct net_device *netdev = dev->netdev;
 600        struct can_frame *cf;
 601        struct sk_buff *skb;
 602
 603        /* allocate an skb to store the error frame */
 604        skb = alloc_can_err_skb(netdev, &cf);
 605        if (!skb)
 606                return -ENOMEM;
 607
 608        cf->can_id |= CAN_ERR_CRTL;
 609        cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
 610
 611        peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
 612
 613        netdev->stats.rx_over_errors++;
 614        netdev->stats.rx_errors++;
 615
 616        return 0;
 617}
 618
 619/* handle USB calibration message */
 620static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
 621                                  struct pucan_msg *rx_msg)
 622{
 623        struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
 624
 625        /* should wait until clock is stabilized */
 626        if (usb_if->cm_ignore_count > 0)
 627                usb_if->cm_ignore_count--;
 628        else
 629                peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
 630}
 631
 632/* callback for bulk IN urb */
 633static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
 634{
 635        struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
 636        struct net_device *netdev = dev->netdev;
 637        struct pucan_msg *rx_msg;
 638        u8 *msg_ptr, *msg_end;
 639        int err = 0;
 640
 641        /* loop reading all the records from the incoming message */
 642        msg_ptr = urb->transfer_buffer;
 643        msg_end = urb->transfer_buffer + urb->actual_length;
 644        for (; msg_ptr < msg_end;) {
 645                u16 rx_msg_type, rx_msg_size;
 646
 647                rx_msg = (struct pucan_msg *)msg_ptr;
 648                if (!rx_msg->size) {
 649                        /* null packet found: end of list */
 650                        break;
 651                }
 652
 653                rx_msg_size = le16_to_cpu(rx_msg->size);
 654                rx_msg_type = le16_to_cpu(rx_msg->type);
 655
 656                /* check if the record goes out of current packet */
 657                if (msg_ptr + rx_msg_size > msg_end) {
 658                        netdev_err(netdev,
 659                                   "got frag rec: should inc usb rx buf sze\n");
 660                        err = -EBADMSG;
 661                        break;
 662                }
 663
 664                switch (rx_msg_type) {
 665                case PUCAN_MSG_CAN_RX:
 666                        err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
 667                        if (err < 0)
 668                                goto fail;
 669                        break;
 670
 671                case PCAN_UFD_MSG_CALIBRATION:
 672                        pcan_usb_fd_decode_ts(usb_if, rx_msg);
 673                        break;
 674
 675                case PUCAN_MSG_ERROR:
 676                        err = pcan_usb_fd_decode_error(usb_if, rx_msg);
 677                        if (err < 0)
 678                                goto fail;
 679                        break;
 680
 681                case PUCAN_MSG_STATUS:
 682                        err = pcan_usb_fd_decode_status(usb_if, rx_msg);
 683                        if (err < 0)
 684                                goto fail;
 685                        break;
 686
 687                case PCAN_UFD_MSG_OVERRUN:
 688                        err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
 689                        if (err < 0)
 690                                goto fail;
 691                        break;
 692
 693                default:
 694                        netdev_err(netdev,
 695                                   "unhandled msg type 0x%02x (%d): ignored\n",
 696                                   rx_msg_type, rx_msg_type);
 697                        break;
 698                }
 699
 700                msg_ptr += rx_msg_size;
 701        }
 702
 703fail:
 704        if (err)
 705                pcan_dump_mem("received msg",
 706                              urb->transfer_buffer, urb->actual_length);
 707        return err;
 708}
 709
 710/* CAN/CANFD frames encoding callback */
 711static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 712                                  struct sk_buff *skb, u8 *obuf, size_t *size)
 713{
 714        struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
 715        struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 716        u16 tx_msg_size, tx_msg_flags;
 717        u8 can_dlc;
 718
 719        tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
 720        tx_msg->size = cpu_to_le16(tx_msg_size);
 721        tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
 722
 723        tx_msg_flags = 0;
 724        if (cfd->can_id & CAN_EFF_FLAG) {
 725                tx_msg_flags |= PUCAN_MSG_EXT_ID;
 726                tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
 727        } else {
 728                tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
 729        }
 730
 731        if (can_is_canfd_skb(skb)) {
 732                /* considering a CANFD frame */
 733                can_dlc = can_len2dlc(cfd->len);
 734
 735                tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
 736
 737                if (cfd->flags & CANFD_BRS)
 738                        tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
 739
 740                if (cfd->flags & CANFD_ESI)
 741                        tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 742        } else {
 743                /* CAND 2.0 frames */
 744                can_dlc = cfd->len;
 745
 746                if (cfd->can_id & CAN_RTR_FLAG)
 747                        tx_msg_flags |= PUCAN_MSG_RTR;
 748        }
 749
 750        tx_msg->flags = cpu_to_le16(tx_msg_flags);
 751        tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
 752        memcpy(tx_msg->d, cfd->data, cfd->len);
 753
 754        /* add null size message to tag the end (messages are 32-bits aligned)
 755         */
 756        tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
 757
 758        tx_msg->size = 0;
 759
 760        /* set the whole size of the USB packet to send */
 761        *size = tx_msg_size + sizeof(u32);
 762
 763        return 0;
 764}
 765
 766/* start the interface (last chance before set bus on) */
 767static int pcan_usb_fd_start(struct peak_usb_device *dev)
 768{
 769        struct pcan_usb_fd_device *pdev =
 770                        container_of(dev, struct pcan_usb_fd_device, dev);
 771        int err;
 772
 773        /* set filter mode: all acceptance */
 774        err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
 775        if (err)
 776                return err;
 777
 778        /* opening first device: */
 779        if (pdev->usb_if->dev_opened_count == 0) {
 780                /* reset time_ref */
 781                peak_usb_init_time_ref(&pdev->usb_if->time_ref,
 782                                       &pcan_usb_pro_fd);
 783
 784                /* enable USB calibration messages */
 785                err = pcan_usb_fd_set_options(dev, 1,
 786                                              PUCAN_OPTION_ERROR,
 787                                              PCAN_UFD_FLTEXT_CALIBRATION);
 788        }
 789
 790        pdev->usb_if->dev_opened_count++;
 791
 792        /* reset cached error counters */
 793        pdev->bec.txerr = 0;
 794        pdev->bec.rxerr = 0;
 795
 796        return err;
 797}
 798
 799/* socket callback used to copy berr counters values receieved through USB */
 800static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 801                                        struct can_berr_counter *bec)
 802{
 803        struct peak_usb_device *dev = netdev_priv(netdev);
 804        struct pcan_usb_fd_device *pdev =
 805                        container_of(dev, struct pcan_usb_fd_device, dev);
 806
 807        *bec = pdev->bec;
 808
 809        /* must return 0 */
 810        return 0;
 811}
 812
 813/* stop interface (last chance before set bus off) */
 814static int pcan_usb_fd_stop(struct peak_usb_device *dev)
 815{
 816        struct pcan_usb_fd_device *pdev =
 817                        container_of(dev, struct pcan_usb_fd_device, dev);
 818
 819        /* turn off special msgs for that interface if no other dev opened */
 820        if (pdev->usb_if->dev_opened_count == 1)
 821                pcan_usb_fd_set_options(dev, 0,
 822                                        PUCAN_OPTION_ERROR,
 823                                        PCAN_UFD_FLTEXT_CALIBRATION);
 824        pdev->usb_if->dev_opened_count--;
 825
 826        return 0;
 827}
 828
 829/* called when probing, to initialize a device object */
 830static int pcan_usb_fd_init(struct peak_usb_device *dev)
 831{
 832        struct pcan_usb_fd_device *pdev =
 833                        container_of(dev, struct pcan_usb_fd_device, dev);
 834        int i, err = -ENOMEM;
 835
 836        /* do this for 1st channel only */
 837        if (!dev->prev_siblings) {
 838                /* allocate netdevices common structure attached to first one */
 839                pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
 840                if (!pdev->usb_if)
 841                        goto err_out;
 842
 843                /* allocate command buffer once for all for the interface */
 844                pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
 845                                                GFP_KERNEL);
 846                if (!pdev->cmd_buffer_addr)
 847                        goto err_out_1;
 848
 849                /* number of ts msgs to ignore before taking one into account */
 850                pdev->usb_if->cm_ignore_count = 5;
 851
 852                err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
 853                                            PCAN_USBPRO_INFO_FW,
 854                                            &pdev->usb_if->fw_info,
 855                                            sizeof(pdev->usb_if->fw_info));
 856                if (err) {
 857                        dev_err(dev->netdev->dev.parent,
 858                                "unable to read %s firmware info (err %d)\n",
 859                                dev->adapter->name, err);
 860                        goto err_out_2;
 861                }
 862
 863                /* explicit use of dev_xxx() instead of netdev_xxx() here:
 864                 * information displayed are related to the device itself, not
 865                 * to the canx (channel) device.
 866                 */
 867                dev_info(dev->netdev->dev.parent,
 868                         "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
 869                         dev->adapter->name, pdev->usb_if->fw_info.hw_version,
 870                         pdev->usb_if->fw_info.fw_version[0],
 871                         pdev->usb_if->fw_info.fw_version[1],
 872                         pdev->usb_if->fw_info.fw_version[2],
 873                         dev->adapter->ctrl_count);
 874
 875                /* check for ability to switch between ISO/non-ISO modes */
 876                if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
 877                        /* firmware >= 2.x supports ISO/non-ISO switching */
 878                        dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 879                } else {
 880                        /* firmware < 2.x only supports fixed(!) non-ISO */
 881                        dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
 882                }
 883
 884                /* tell the hardware the can driver is running */
 885                err = pcan_usb_fd_drv_loaded(dev, 1);
 886                if (err) {
 887                        dev_err(dev->netdev->dev.parent,
 888                                "unable to tell %s driver is loaded (err %d)\n",
 889                                dev->adapter->name, err);
 890                        goto err_out_2;
 891                }
 892        } else {
 893                /* otherwise, simply copy previous sibling's values */
 894                struct pcan_usb_fd_device *ppdev =
 895                        container_of(dev->prev_siblings,
 896                                     struct pcan_usb_fd_device, dev);
 897
 898                pdev->usb_if = ppdev->usb_if;
 899                pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
 900
 901                /* do a copy of the ctrlmode[_supported] too */
 902                dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
 903                dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
 904        }
 905
 906        pdev->usb_if->dev[dev->ctrl_idx] = dev;
 907        dev->device_number =
 908                le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
 909
 910        /* set clock domain */
 911        for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
 912                if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
 913                        break;
 914
 915        if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
 916                dev_warn(dev->netdev->dev.parent,
 917                         "incompatible clock frequencies\n");
 918                err = -EINVAL;
 919                goto err_out_2;
 920        }
 921
 922        pcan_usb_fd_set_clock_domain(dev, i);
 923
 924        /* set LED in default state (end of init phase) */
 925        pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
 926
 927        return 0;
 928
 929err_out_2:
 930        kfree(pdev->cmd_buffer_addr);
 931err_out_1:
 932        kfree(pdev->usb_if);
 933err_out:
 934        return err;
 935}
 936
 937/* called when driver module is being unloaded */
 938static void pcan_usb_fd_exit(struct peak_usb_device *dev)
 939{
 940        struct pcan_usb_fd_device *pdev =
 941                        container_of(dev, struct pcan_usb_fd_device, dev);
 942
 943        /* when rmmod called before unplug and if down, should reset things
 944         * before leaving
 945         */
 946        if (dev->can.state != CAN_STATE_STOPPED) {
 947                /* set bus off on the corresponding channel */
 948                pcan_usb_fd_set_bus(dev, 0);
 949        }
 950
 951        /* switch off corresponding CAN LEDs */
 952        pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
 953
 954        /* if channel #0 (only) */
 955        if (dev->ctrl_idx == 0) {
 956                /* turn off calibration message if any device were opened */
 957                if (pdev->usb_if->dev_opened_count > 0)
 958                        pcan_usb_fd_set_options(dev, 0,
 959                                                PUCAN_OPTION_ERROR,
 960                                                PCAN_UFD_FLTEXT_CALIBRATION);
 961
 962                /* tell USB adapter that the driver is being unloaded */
 963                pcan_usb_fd_drv_loaded(dev, 0);
 964        }
 965}
 966
 967/* called when the USB adapter is unplugged */
 968static void pcan_usb_fd_free(struct peak_usb_device *dev)
 969{
 970        /* last device: can free shared objects now */
 971        if (!dev->prev_siblings && !dev->next_siblings) {
 972                struct pcan_usb_fd_device *pdev =
 973                        container_of(dev, struct pcan_usb_fd_device, dev);
 974
 975                /* free commands buffer */
 976                kfree(pdev->cmd_buffer_addr);
 977
 978                /* free usb interface object */
 979                kfree(pdev->usb_if);
 980        }
 981}
 982
 983/* describes the PCAN-USB FD adapter */
 984static const struct can_bittiming_const pcan_usb_fd_const = {
 985        .name = "pcan_usb_fd",
 986        .tseg1_min = 1,
 987        .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
 988        .tseg2_min = 1,
 989        .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
 990        .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
 991        .brp_min = 1,
 992        .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
 993        .brp_inc = 1,
 994};
 995
 996static const struct can_bittiming_const pcan_usb_fd_data_const = {
 997        .name = "pcan_usb_fd",
 998        .tseg1_min = 1,
 999        .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1000        .tseg2_min = 1,

1001        .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1002        .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1003        .brp_min = 1,
1004        .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1005        .brp_inc = 1,
1006};
1007
1008const struct peak_usb_adapter pcan_usb_fd = {
1009        .name = "PCAN-USB FD",
1010        .device_id = PCAN_USBFD_PRODUCT_ID,
1011        .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1012        .ctrlmode_supported = CAN_CTRLMODE_FD |
1013                        CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1014        .clock = {
1015                .freq = PCAN_UFD_CRYSTAL_HZ,
1016        },
1017        .bittiming_const = &pcan_usb_fd_const,
1018        .data_bittiming_const = &pcan_usb_fd_data_const,
1019
1020        /* size of device private data */
1021        .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1022
1023        /* timestamps usage */
1024        .ts_used_bits = 32,
1025        .ts_period = 1000000, /* calibration period in ts. */
1026        .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1027        .us_per_ts_shift = 0,
1028
1029        /* give here messages in/out endpoints */
1030        .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1031        .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1032
1033        /* size of rx/tx usb buffers */
1034        .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1035        .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1036
1037        /* device callbacks */
1038        .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1039        .dev_init = pcan_usb_fd_init,
1040
1041        .dev_exit = pcan_usb_fd_exit,
1042        .dev_free = pcan_usb_fd_free,
1043        .dev_set_bus = pcan_usb_fd_set_bus,
1044        .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1045        .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1046        .dev_decode_buf = pcan_usb_fd_decode_buf,
1047        .dev_start = pcan_usb_fd_start,
1048        .dev_stop = pcan_usb_fd_stop,
1049        .dev_restart_async = pcan_usb_fd_restart_async,
1050        .dev_encode_msg = pcan_usb_fd_encode_msg,
1051
1052        .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1053};
1054
1055/* describes the PCAN-CHIP USB */
1056static const struct can_bittiming_const pcan_usb_chip_const = {
1057        .name = "pcan_chip_usb",
1058        .tseg1_min = 1,
1059        .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1060        .tseg2_min = 1,
1061        .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1062        .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1063        .brp_min = 1,
1064        .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1065        .brp_inc = 1,
1066};
1067
1068static const struct can_bittiming_const pcan_usb_chip_data_const = {
1069        .name = "pcan_chip_usb",
1070        .tseg1_min = 1,
1071        .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1072        .tseg2_min = 1,
1073        .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1074        .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1075        .brp_min = 1,
1076        .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1077        .brp_inc = 1,
1078};
1079
1080const struct peak_usb_adapter pcan_usb_chip = {
1081        .name = "PCAN-Chip USB",
1082        .device_id = PCAN_USBCHIP_PRODUCT_ID,
1083        .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1084        .ctrlmode_supported = CAN_CTRLMODE_FD |
1085                CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1086        .clock = {
1087                .freq = PCAN_UFD_CRYSTAL_HZ,
1088        },
1089        .bittiming_const = &pcan_usb_chip_const,
1090        .data_bittiming_const = &pcan_usb_chip_data_const,
1091
1092        /* size of device private data */
1093        .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1094
1095        /* timestamps usage */
1096        .ts_used_bits = 32,
1097        .ts_period = 1000000, /* calibration period in ts. */
1098        .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1099        .us_per_ts_shift = 0,
1100
1101        /* give here messages in/out endpoints */
1102        .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1103        .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1104
1105        /* size of rx/tx usb buffers */
1106        .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1107        .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1108
1109        /* device callbacks */
1110        .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1111        .dev_init = pcan_usb_fd_init,
1112
1113        .dev_exit = pcan_usb_fd_exit,
1114        .dev_free = pcan_usb_fd_free,
1115        .dev_set_bus = pcan_usb_fd_set_bus,
1116        .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1117        .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1118        .dev_decode_buf = pcan_usb_fd_decode_buf,
1119        .dev_start = pcan_usb_fd_start,
1120        .dev_stop = pcan_usb_fd_stop,
1121        .dev_restart_async = pcan_usb_fd_restart_async,
1122        .dev_encode_msg = pcan_usb_fd_encode_msg,
1123
1124        .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1125};
1126
1127/* describes the PCAN-USB Pro FD adapter */
1128static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1129        .name = "pcan_usb_pro_fd",
1130        .tseg1_min = 1,
1131        .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1132        .tseg2_min = 1,
1133        .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1134        .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1135        .brp_min = 1,
1136        .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1137        .brp_inc = 1,
1138};
1139
1140static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1141        .name = "pcan_usb_pro_fd",
1142        .tseg1_min = 1,
1143        .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1144        .tseg2_min = 1,
1145        .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1146        .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1147        .brp_min = 1,
1148        .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1149        .brp_inc = 1,
1150};
1151
1152const struct peak_usb_adapter pcan_usb_pro_fd = {
1153        .name = "PCAN-USB Pro FD",
1154        .device_id = PCAN_USBPROFD_PRODUCT_ID,
1155        .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1156        .ctrlmode_supported = CAN_CTRLMODE_FD |
1157                        CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1158        .clock = {
1159                .freq = PCAN_UFD_CRYSTAL_HZ,
1160        },
1161        .bittiming_const = &pcan_usb_pro_fd_const,
1162        .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1163
1164        /* size of device private data */
1165        .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1166
1167        /* timestamps usage */
1168        .ts_used_bits = 32,
1169        .ts_period = 1000000, /* calibration period in ts. */
1170        .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1171        .us_per_ts_shift = 0,
1172
1173        /* give here messages in/out endpoints */
1174        .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1175        .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1176
1177        /* size of rx/tx usb buffers */
1178        .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1179        .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1180
1181        /* device callbacks */
1182        .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1183        .dev_init = pcan_usb_fd_init,
1184
1185        .dev_exit = pcan_usb_fd_exit,
1186        .dev_free = pcan_usb_fd_free,
1187        .dev_set_bus = pcan_usb_fd_set_bus,
1188        .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1189        .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1190        .dev_decode_buf = pcan_usb_fd_decode_buf,
1191        .dev_start = pcan_usb_fd_start,
1192        .dev_stop = pcan_usb_fd_stop,
1193        .dev_restart_async = pcan_usb_fd_restart_async,
1194        .dev_encode_msg = pcan_usb_fd_encode_msg,
1195
1196        .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1197};
1198
1199/* describes the PCAN-USB X6 adapter */
1200static const struct can_bittiming_const pcan_usb_x6_const = {
1201        .name = "pcan_usb_x6",
1202        .tseg1_min = 1,
1203        .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1204        .tseg2_min = 1,
1205        .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1206        .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1207        .brp_min = 1,
1208        .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1209        .brp_inc = 1,
1210};
1211
1212static const struct can_bittiming_const pcan_usb_x6_data_const = {
1213        .name = "pcan_usb_x6",
1214        .tseg1_min = 1,
1215        .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1216        .tseg2_min = 1,
1217        .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1218        .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1219        .brp_min = 1,
1220        .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1221        .brp_inc = 1,
1222};
1223
1224const struct peak_usb_adapter pcan_usb_x6 = {
1225        .name = "PCAN-USB X6",
1226        .device_id = PCAN_USBX6_PRODUCT_ID,
1227        .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1228        .ctrlmode_supported = CAN_CTRLMODE_FD |
1229                        CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1230        .clock = {
1231                .freq = PCAN_UFD_CRYSTAL_HZ,
1232        },
1233        .bittiming_const = &pcan_usb_x6_const,
1234        .data_bittiming_const = &pcan_usb_x6_data_const,
1235
1236        /* size of device private data */
1237        .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1238
1239        /* timestamps usage */
1240        .ts_used_bits = 32,
1241        .ts_period = 1000000, /* calibration period in ts. */
1242        .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1243        .us_per_ts_shift = 0,
1244
1245        /* give here messages in/out endpoints */
1246        .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1247        .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1248
1249        /* size of rx/tx usb buffers */
1250        .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1251        .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1252
1253        /* device callbacks */
1254        .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1255        .dev_init = pcan_usb_fd_init,
1256
1257        .dev_exit = pcan_usb_fd_exit,
1258        .dev_free = pcan_usb_fd_free,
1259        .dev_set_bus = pcan_usb_fd_set_bus,
1260        .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1261        .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1262        .dev_decode_buf = pcan_usb_fd_decode_buf,
1263        .dev_start = pcan_usb_fd_start,
1264        .dev_stop = pcan_usb_fd_stop,
1265        .dev_restart_async = pcan_usb_fd_restart_async,
1266        .dev_encode_msg = pcan_usb_fd_encode_msg,
1267
1268        .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1269};
1270