drivers/net/can/usb/peak_usb/pcan_usb_fd.c

   1 /*
   2  * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
   3  *
   4  * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published
   8  * by the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  */
  15 #include <linux/netdevice.h>
  16 #include <linux/usb.h>
  17 #include <linux/module.h>
  18
  19 #include <linux/can.h>
  20 #include <linux/can/dev.h>
  21 #include <linux/can/error.h>
  22
  23 #include "pcan_usb_core.h"
  24 #include "pcan_usb_pro.h"
  25 #include "pcan_ucan.h"
  26
  27 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter");
  28 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
  29
  30 #define PCAN_USBPROFD_CHANNEL_COUNT     2
  31 #define PCAN_USBFD_CHANNEL_COUNT        1
  32
  33 /* PCAN-USB Pro FD adapter internal clock (Hz) */
  34 #define PCAN_UFD_CRYSTAL_HZ             80000000
  35
  36 #define PCAN_UFD_CMD_BUFFER_SIZE        512
  37 #define PCAN_UFD_LOSPD_PKT_SIZE         64
  38
  39 /* PCAN-USB Pro FD command timeout (ms.) */
  40 #define PCAN_UFD_CMD_TIMEOUT_MS         1000
  41
  42 /* PCAN-USB Pro FD rx/tx buffers size */
  43 #define PCAN_UFD_RX_BUFFER_SIZE         2048
  44 #define PCAN_UFD_TX_BUFFER_SIZE         512
  45
  46 /* read some versions info from the hw devcie */
  47 struct __packed pcan_ufd_fw_info {
  48         __le16  size_of;        /* sizeof this */
  49         __le16  type;           /* type of this structure */
  50         u8      hw_type;        /* Type of hardware (HW_TYPE_xxx) */
  51         u8      bl_version[3];  /* Bootloader version */
  52         u8      hw_version;     /* Hardware version (PCB) */
  53         u8      fw_version[3];  /* Firmware version */
  54         __le32  dev_id[2];      /* "device id" per CAN */
  55         __le32  ser_no;         /* S/N */
  56         __le32  flags;          /* special functions */
  57 };
  58
  59 /* handle device specific info used by the netdevices */
  60 struct pcan_usb_fd_if {
  61         struct peak_usb_device  *dev[PCAN_USB_MAX_CHANNEL];
  62         struct pcan_ufd_fw_info fw_info;
  63         struct peak_time_ref    time_ref;
  64         int                     cm_ignore_count;
  65         int                     dev_opened_count;
  66 };
  67
  68 /* device information */
  69 struct pcan_usb_fd_device {
  70         struct peak_usb_device  dev;
  71         struct can_berr_counter bec;
  72         struct pcan_usb_fd_if   *usb_if;
  73         u8                      *cmd_buffer_addr;
  74 };
  75
  76 /* Extended USB commands (non uCAN commands) */
  77
  78 /* Clock Modes command */
  79 #define PCAN_UFD_CMD_CLK_SET            0x80
  80
  81 #define PCAN_UFD_CLK_80MHZ              0x0
  82 #define PCAN_UFD_CLK_60MHZ              0x1
  83 #define PCAN_UFD_CLK_40MHZ              0x2
  84 #define PCAN_UFD_CLK_30MHZ              0x3
  85 #define PCAN_UFD_CLK_24MHZ              0x4
  86 #define PCAN_UFD_CLK_20MHZ              0x5
  87 #define PCAN_UFD_CLK_DEF                PCAN_UFD_CLK_80MHZ
  88
  89 struct __packed pcan_ufd_clock {
  90         __le16  opcode_channel;
  91
  92         u8      mode;
  93         u8      unused[5];
  94 };
  95
  96 /* LED control command */
  97 #define PCAN_UFD_CMD_LED_SET            0x86
  98
  99 #define PCAN_UFD_LED_DEV                0x00
 100 #define PCAN_UFD_LED_FAST               0x01
 101 #define PCAN_UFD_LED_SLOW               0x02
 102 #define PCAN_UFD_LED_ON                 0x03
 103 #define PCAN_UFD_LED_OFF                0x04
 104 #define PCAN_UFD_LED_DEF                PCAN_UFD_LED_DEV
 105
 106 struct __packed pcan_ufd_led {
 107         __le16  opcode_channel;
 108
 109         u8      mode;
 110         u8      unused[5];
 111 };
 112
 113 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
 114 #define PCAN_UFD_FLTEXT_CALIBRATION     0x8000
 115
 116 struct __packed pcan_ufd_options {
 117         __le16  opcode_channel;
 118
 119         __le16  ucan_mask;
 120         u16     unused;
 121         __le16  usb_mask;
 122 };
 123
 124 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
 125 #define PCAN_UFD_MSG_CALIBRATION        0x100
 126
 127 struct __packed pcan_ufd_ts_msg {
 128         __le16  size;
 129         __le16  type;
 130         __le32  ts_low;
 131         __le32  ts_high;
 132         __le16  usb_frame_index;
 133         u16     unused;
 134 };
 135
 136 #define PCAN_UFD_MSG_OVERRUN            0x101
 137
 138 #define PCAN_UFD_OVMSG_CHANNEL(o)       ((o)->channel & 0xf)
 139
 140 struct __packed pcan_ufd_ovr_msg {
 141         __le16  size;
 142         __le16  type;
 143         __le32  ts_low;
 144         __le32  ts_high;
 145         u8      channel;
 146         u8      unused[3];
 147 };
 148
 149 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
 150 {
 151         return om->channel & 0xf;
 152 }
 153
 154 /* Clock mode frequency values */
 155 static const u32 pcan_usb_fd_clk_freq[6] = {
 156         [PCAN_UFD_CLK_80MHZ] = 80000000,
 157         [PCAN_UFD_CLK_60MHZ] = 60000000,
 158         [PCAN_UFD_CLK_40MHZ] = 40000000,
 159         [PCAN_UFD_CLK_30MHZ] = 30000000,
 160         [PCAN_UFD_CLK_24MHZ] = 24000000,
 161         [PCAN_UFD_CLK_20MHZ] = 20000000
 162 };
 163
 164 /* return a device USB interface */
 165 static inline
 166 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(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->usb_if;
 171 }
 172
 173 /* return a device USB commands buffer */
 174 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
 175 {
 176         struct pcan_usb_fd_device *pdev =
 177                         container_of(dev, struct pcan_usb_fd_device, dev);
 178         return pdev->cmd_buffer_addr;
 179 }
 180
 181 /* send PCAN-USB Pro FD commands synchronously */
 182 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
 183 {
 184         void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
 185         int err = 0;
 186         u8 *packet_ptr;
 187         int packet_len;
 188         ptrdiff_t cmd_len;
 189
 190         /* usb device unregistered? */
 191         if (!(dev->state & PCAN_USB_STATE_CONNECTED))
 192                 return 0;
 193
 194         /* if a packet is not filled completely by commands, the command list
 195          * is terminated with an "end of collection" record.
 196          */
 197         cmd_len = cmd_tail - cmd_head;
 198         if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
 199                 memset(cmd_tail, 0xff, sizeof(u64));
 200                 cmd_len += sizeof(u64);
 201         }
 202
 203         packet_ptr = cmd_head;
 204         packet_len = cmd_len;
 205
 206         /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
 207         if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
 208                 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
 209
 210         do {
 211                 err = usb_bulk_msg(dev->udev,
 212                                    usb_sndbulkpipe(dev->udev,
 213                                                    PCAN_USBPRO_EP_CMDOUT),
 214                                    packet_ptr, packet_len,
 215                                    NULL, PCAN_UFD_CMD_TIMEOUT_MS);
 216                 if (err) {
 217                         netdev_err(dev->netdev,
 218                                    "sending command failure: %d\n", err);
 219                         break;
 220                 }
 221
 222                 packet_ptr += packet_len;
 223                 cmd_len -= packet_len;
 224
 225                 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
 226                         packet_len = cmd_len;
 227
 228         } while (packet_len > 0);
 229
 230         return err;
 231 }
 232
 233 /* build the commands list in the given buffer, to enter operational mode */
 234 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
 235 {
 236         struct pucan_wr_err_cnt *prc;
 237         struct pucan_command *cmd;
 238         u8 *pc = buf;
 239
 240         /* 1st, reset error counters: */
 241         prc = (struct pucan_wr_err_cnt *)pc;
 242         prc->opcode_channel = pucan_cmd_opcode_channel(dev,
 243                                                        PUCAN_CMD_WR_ERR_CNT);
 244
 245         /* select both counters */
 246         prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
 247
 248         /* and reset their values */
 249         prc->tx_counter = 0;
 250         prc->rx_counter = 0;
 251
 252         /* moves the pointer forward */
 253         pc += sizeof(struct pucan_wr_err_cnt);
 254
 255         /* add command to switch from ISO to non-ISO mode, if fw allows it */
 256         if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
 257                 struct pucan_options *puo = (struct pucan_options *)pc;
 258
 259                 puo->opcode_channel =
 260                         (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
 261                         pucan_cmd_opcode_channel(dev,
 262                                                  PUCAN_CMD_CLR_DIS_OPTION) :
 263                         pucan_cmd_opcode_channel(dev, PUCAN_CMD_SET_EN_OPTION);
 264
 265                 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
 266
 267                 /* to be sure that no other extended bits will be taken into
 268                  * account
 269                  */
 270                 puo->unused = 0;
 271
 272                 /* moves the pointer forward */
 273                 pc += sizeof(struct pucan_options);
 274         }
 275
 276         /* next, go back to operational mode */
 277         cmd = (struct pucan_command *)pc;
 278         cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 279                                 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
 280                                                 PUCAN_CMD_LISTEN_ONLY_MODE :
 281                                                 PUCAN_CMD_NORMAL_MODE);
 282         pc += sizeof(struct pucan_command);
 283
 284         return pc - buf;
 285 }
 286
 287 /* set CAN bus on/off */
 288 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
 289 {
 290         u8 *pc = pcan_usb_fd_cmd_buffer(dev);
 291         int l;
 292
 293         if (onoff) {
 294                 /* build the cmds list to enter operational mode */
 295                 l = pcan_usb_fd_build_restart_cmd(dev, pc);
 296         } else {
 297                 struct pucan_command *cmd = (struct pucan_command *)pc;
 298
 299                 /* build cmd to go back to reset mode */
 300                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 301                                                         PUCAN_CMD_RESET_MODE);
 302                 l = sizeof(struct pucan_command);
 303         }
 304
 305         /* send the command */
 306         return pcan_usb_fd_send_cmd(dev, pc + l);
 307 }
 308
 309 /* set filtering masks:
 310  *
 311  *      idx  in range [0..63] selects a row #idx, all rows otherwise
 312  *      mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
 313  *
 314  *      Each bit of this 64 x 32 bits array defines a CANID value:
 315  *
 316  *      bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
 317  *      bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
 318  */
 319 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
 320                                       u32 mask)
 321 {
 322         struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
 323         int i, n;
 324
 325         /* select all rows when idx is out of range [0..63] */
 326         if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
 327                 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
 328                 idx = 0;
 329
 330         /* select the row (and only the row) otherwise */
 331         } else {
 332                 n = idx + 1;
 333         }
 334
 335         for (i = idx; i < n; i++, cmd++) {
 336                 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 337                                                         PUCAN_CMD_FILTER_STD);
 338                 cmd->idx = cpu_to_le16(i);
 339                 cmd->mask = cpu_to_le32(mask);
 340         }
 341
 342         /* send the command */
 343         return pcan_usb_fd_send_cmd(dev, cmd);
 344 }
 345
 346 /* set/unset options
 347  *
 348  *      onoff   set(1)/unset(0) options
 349  *      mask    each bit defines a kind of options to set/unset
 350  */
 351 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
 352                                    bool onoff, u16 ucan_mask, u16 usb_mask)
 353 {
 354         struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
 355
 356         cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 357                                         (onoff) ? PUCAN_CMD_SET_EN_OPTION :
 358                                                   PUCAN_CMD_CLR_DIS_OPTION);
 359
 360         cmd->ucan_mask = cpu_to_le16(ucan_mask);
 361         cmd->usb_mask = cpu_to_le16(usb_mask);
 362
 363         /* send the command */
 364         return pcan_usb_fd_send_cmd(dev, ++cmd);
 365 }
 366
 367 /* setup LED control */
 368 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
 369 {
 370         struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
 371
 372         cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 373                                                        PCAN_UFD_CMD_LED_SET);
 374         cmd->mode = led_mode;
 375
 376         /* send the command */
 377         return pcan_usb_fd_send_cmd(dev, ++cmd);
 378 }
 379
 380 /* set CAN clock domain */
 381 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
 382                                         u8 clk_mode)
 383 {
 384         struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
 385
 386         cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 387                                                        PCAN_UFD_CMD_CLK_SET);
 388         cmd->mode = clk_mode;
 389
 390         /* send the command */
 391         return pcan_usb_fd_send_cmd(dev, ++cmd);
 392 }
 393
 394 /* set bittiming for CAN and CAN-FD header */
 395 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
 396                                           struct can_bittiming *bt)
 397 {
 398         struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
 399
 400         cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 401                                                        PUCAN_CMD_TIMING_SLOW);
 402         cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
 403                                 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
 404
 405         cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
 406         cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 407         cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
 408
 409         cmd->ewl = 96;  /* default */
 410
 411         /* send the command */
 412         return pcan_usb_fd_send_cmd(dev, ++cmd);
 413 }
 414
 415 /* set CAN-FD bittiming for data */
 416 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
 417                                           struct can_bittiming *bt)
 418 {
 419         struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
 420
 421         cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
 422                                                        PUCAN_CMD_TIMING_FAST);
 423         cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
 424         cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
 425         cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
 426         cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
 427
 428         /* send the command */
 429         return pcan_usb_fd_send_cmd(dev, ++cmd);
 430 }
 431
 432 /* handle restart but in asynchronously way
 433  * (uses PCAN-USB Pro code to complete asynchronous request)
 434  */
 435 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
 436                                      struct urb *urb, u8 *buf)
 437 {
 438         u8 *pc = buf;
 439
 440         /* build the entire cmds list in the provided buffer, to go back into
 441          * operational mode.
 442          */
 443         pc += pcan_usb_fd_build_restart_cmd(dev, pc);
 444
 445         /* add EOC */
 446         memset(pc, 0xff, sizeof(struct pucan_command));
 447         pc += sizeof(struct pucan_command);
 448
 449         /* complete the URB */
 450         usb_fill_bulk_urb(urb, dev->udev,
 451                           usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
 452                           buf, pc - buf,
 453                           pcan_usb_pro_restart_complete, dev);
 454
 455         /* and submit it. */
 456         return usb_submit_urb(urb, GFP_ATOMIC);
 457 }
 458
 459 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
 460 {
 461         struct pcan_usb_fd_device *pdev =
 462                         container_of(dev, struct pcan_usb_fd_device, dev);
 463
 464         pdev->cmd_buffer_addr[0] = 0;
 465         pdev->cmd_buffer_addr[1] = !!loaded;
 466
 467         return pcan_usb_pro_send_req(dev,
 468                                 PCAN_USBPRO_REQ_FCT,
 469                                 PCAN_USBPRO_FCT_DRVLD,
 470                                 pdev->cmd_buffer_addr,
 471                                 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
 472 }
 473
 474 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
 475                                      struct pucan_msg *rx_msg)
 476 {
 477         struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
 478         struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)];
 479         struct net_device *netdev = dev->netdev;
 480         struct canfd_frame *cfd;
 481         struct sk_buff *skb;
 482         const u16 rx_msg_flags = le16_to_cpu(rm->flags);
 483
 484         if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
 485                 /* CANFD frame case */
 486                 skb = alloc_canfd_skb(netdev, &cfd);
 487                 if (!skb)
 488                         return -ENOMEM;
 489
 490                 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
 491                         cfd->flags |= CANFD_BRS;
 492
 493                 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
 494                         cfd->flags |= CANFD_ESI;
 495
 496                 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
 497         } else {
 498                 /* CAN 2.0 frame case */
 499                 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 500                 if (!skb)
 501                         return -ENOMEM;
 502
 503                 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
 504         }
 505
 506         cfd->can_id = le32_to_cpu(rm->can_id);
 507
 508         if (rx_msg_flags & PUCAN_MSG_EXT_ID)
 509                 cfd->can_id |= CAN_EFF_FLAG;
 510
 511         if (rx_msg_flags & PUCAN_MSG_RTR)
 512                 cfd->can_id |= CAN_RTR_FLAG;
 513         else
 514                 memcpy(cfd->data, rm->d, cfd->len);
 515
 516         peak_usb_netif_rx(skb, &usb_if->time_ref,
 517                           le32_to_cpu(rm->ts_low), le32_to_cpu(rm->ts_high));
 518
 519         netdev->stats.rx_packets++;
 520         netdev->stats.rx_bytes += cfd->len;
 521
 522         return 0;
 523 }
 524
 525 /* handle uCAN status message */
 526 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
 527                                      struct pucan_msg *rx_msg)
 528 {
 529         struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
 530         struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
 531         struct pcan_usb_fd_device *pdev =
 532                         container_of(dev, struct pcan_usb_fd_device, dev);
 533         enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 534         enum can_state rx_state, tx_state;
 535         struct net_device *netdev = dev->netdev;
 536         struct can_frame *cf;
 537         struct sk_buff *skb;
 538
 539         /* nothing should be sent while in BUS_OFF state */
 540         if (dev->can.state == CAN_STATE_BUS_OFF)
 541                 return 0;
 542
 543         if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
 544                 new_state = CAN_STATE_BUS_OFF;
 545         } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
 546                 new_state = CAN_STATE_ERROR_PASSIVE;
 547         } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
 548                 new_state = CAN_STATE_ERROR_WARNING;
 549         } else {
 550                 /* no error bit (so, no error skb, back to active state) */
 551                 dev->can.state = CAN_STATE_ERROR_ACTIVE;
 552                 pdev->bec.txerr = 0;
 553                 pdev->bec.rxerr = 0;
 554                 return 0;
 555         }
 556
 557         /* state hasn't changed */
 558         if (new_state == dev->can.state)
 559                 return 0;
 560
 561         /* handle bus state change */
 562         tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
 563         rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
 564
 565         /* allocate an skb to store the error frame */
 566         skb = alloc_can_err_skb(netdev, &cf);
 567         if (skb)
 568                 can_change_state(netdev, cf, tx_state, rx_state);
 569
 570         /* things must be done even in case of OOM */
 571         if (new_state == CAN_STATE_BUS_OFF)
 572                 can_bus_off(netdev);
 573
 574         if (!skb)
 575                 return -ENOMEM;
 576
 577         peak_usb_netif_rx(skb, &usb_if->time_ref,
 578                           le32_to_cpu(sm->ts_low), le32_to_cpu(sm->ts_high));
 579
 580         netdev->stats.rx_packets++;
 581         netdev->stats.rx_bytes += cf->can_dlc;
 582
 583         return 0;
 584 }
 585
 586 /* handle uCAN error message */
 587 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
 588                                     struct pucan_msg *rx_msg)
 589 {
 590         struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
 591         struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)];
 592         struct pcan_usb_fd_device *pdev =
 593                         container_of(dev, struct pcan_usb_fd_device, dev);
 594
 595         /* keep a trace of tx and rx error counters for later use */
 596         pdev->bec.txerr = er->tx_err_cnt;
 597         pdev->bec.rxerr = er->rx_err_cnt;
 598
 599         return 0;
 600 }
 601
 602 /* handle uCAN overrun message */
 603 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
 604                                       struct pucan_msg *rx_msg)
 605 {
 606         struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
 607         struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)];
 608         struct net_device *netdev = dev->netdev;
 609         struct can_frame *cf;
 610         struct sk_buff *skb;
 611
 612         /* allocate an skb to store the error frame */
 613         skb = alloc_can_err_skb(netdev, &cf);
 614         if (!skb)
 615                 return -ENOMEM;
 616
 617         cf->can_id |= CAN_ERR_CRTL;
 618         cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
 619
 620         peak_usb_netif_rx(skb, &usb_if->time_ref,
 621                           le32_to_cpu(ov->ts_low), le32_to_cpu(ov->ts_high));
 622
 623         netdev->stats.rx_over_errors++;
 624         netdev->stats.rx_errors++;
 625
 626         return 0;
 627 }
 628
 629 /* handle USB calibration message */
 630 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
 631                                   struct pucan_msg *rx_msg)
 632 {
 633         struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
 634
 635         /* should wait until clock is stabilized */
 636         if (usb_if->cm_ignore_count > 0)
 637                 usb_if->cm_ignore_count--;
 638         else
 639                 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
 640 }
 641
 642 /* callback for bulk IN urb */
 643 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
 644 {
 645         struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
 646         struct net_device *netdev = dev->netdev;
 647         struct pucan_msg *rx_msg;
 648         u8 *msg_ptr, *msg_end;
 649         int err = 0;
 650
 651         /* loop reading all the records from the incoming message */
 652         msg_ptr = urb->transfer_buffer;
 653         msg_end = urb->transfer_buffer + urb->actual_length;
 654         for (; msg_ptr < msg_end;) {
 655                 u16 rx_msg_type, rx_msg_size;
 656
 657                 rx_msg = (struct pucan_msg *)msg_ptr;
 658                 if (!rx_msg->size) {
 659                         /* null packet found: end of list */
 660                         break;
 661                 }
 662
 663                 rx_msg_size = le16_to_cpu(rx_msg->size);
 664                 rx_msg_type = le16_to_cpu(rx_msg->type);
 665
 666                 /* check if the record goes out of current packet */
 667                 if (msg_ptr + rx_msg_size > msg_end) {
 668                         netdev_err(netdev,
 669                                    "got frag rec: should inc usb rx buf sze\n");
 670                         err = -EBADMSG;
 671                         break;
 672                 }
 673
 674                 switch (rx_msg_type) {
 675                 case PUCAN_MSG_CAN_RX:
 676                         err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
 677                         if (err < 0)
 678                                 goto fail;
 679                         break;
 680
 681                 case PCAN_UFD_MSG_CALIBRATION:
 682                         pcan_usb_fd_decode_ts(usb_if, rx_msg);
 683                         break;
 684
 685                 case PUCAN_MSG_ERROR:
 686                         err = pcan_usb_fd_decode_error(usb_if, rx_msg);
 687                         if (err < 0)
 688                                 goto fail;
 689                         break;
 690
 691                 case PUCAN_MSG_STATUS:
 692                         err = pcan_usb_fd_decode_status(usb_if, rx_msg);
 693                         if (err < 0)
 694                                 goto fail;
 695                         break;
 696
 697                 case PCAN_UFD_MSG_OVERRUN:
 698                         err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
 699                         if (err < 0)
 700                                 goto fail;
 701                         break;
 702
 703                 default:
 704                         netdev_err(netdev,
 705                                    "unhandled msg type 0x%02x (%d): ignored\n",
 706                                    rx_msg_type, rx_msg_type);
 707                         break;
 708                 }
 709
 710                 msg_ptr += rx_msg_size;
 711         }
 712
 713 fail:
 714         if (err)
 715                 pcan_dump_mem("received msg",
 716                               urb->transfer_buffer, urb->actual_length);
 717         return err;
 718 }
 719
 720 /* CAN/CANFD frames encoding callback */
 721 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 722                                   struct sk_buff *skb, u8 *obuf, size_t *size)
 723 {
 724         struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
 725         struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 726         u16 tx_msg_size, tx_msg_flags;
 727         u8 can_dlc;
 728
 729         tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
 730         tx_msg->size = cpu_to_le16(tx_msg_size);
 731         tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
 732
 733         tx_msg_flags = 0;
 734         if (cfd->can_id & CAN_EFF_FLAG) {
 735                 tx_msg_flags |= PUCAN_MSG_EXT_ID;
 736                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
 737         } else {
 738                 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
 739         }
 740
 741         if (can_is_canfd_skb(skb)) {
 742                 /* considering a CANFD frame */
 743                 can_dlc = can_len2dlc(cfd->len);
 744
 745                 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
 746
 747                 if (cfd->flags & CANFD_BRS)
 748                         tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
 749
 750                 if (cfd->flags & CANFD_ESI)
 751                         tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 752         } else {
 753                 /* CAND 2.0 frames */
 754                 can_dlc = cfd->len;
 755
 756                 if (cfd->can_id & CAN_RTR_FLAG)
 757                         tx_msg_flags |= PUCAN_MSG_RTR;
 758         }
 759
 760         tx_msg->flags = cpu_to_le16(tx_msg_flags);
 761         tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
 762         memcpy(tx_msg->d, cfd->data, cfd->len);
 763
 764         /* add null size message to tag the end (messages are 32-bits aligned)
 765          */
 766         tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
 767
 768         tx_msg->size = 0;
 769
 770         /* set the whole size of the USB packet to send */
 771         *size = tx_msg_size + sizeof(u32);
 772
 773         return 0;
 774 }
 775
 776 /* start the interface (last chance before set bus on) */
 777 static int pcan_usb_fd_start(struct peak_usb_device *dev)
 778 {
 779         struct pcan_usb_fd_device *pdev =
 780                         container_of(dev, struct pcan_usb_fd_device, dev);
 781         int err;
 782
 783         /* set filter mode: all acceptance */
 784         err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
 785         if (err)
 786                 return err;
 787
 788         /* opening first device: */
 789         if (pdev->usb_if->dev_opened_count == 0) {
 790                 /* reset time_ref */
 791                 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
 792                                        &pcan_usb_pro_fd);
 793
 794                 /* enable USB calibration messages */
 795                 err = pcan_usb_fd_set_options(dev, 1,
 796                                               PUCAN_OPTION_ERROR,
 797                                               PCAN_UFD_FLTEXT_CALIBRATION);
 798         }
 799
 800         pdev->usb_if->dev_opened_count++;
 801
 802         /* reset cached error counters */
 803         pdev->bec.txerr = 0;
 804         pdev->bec.rxerr = 0;
 805
 806         return err;
 807 }
 808
 809 /* socket callback used to copy berr counters values receieved through USB */
 810 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 811                                         struct can_berr_counter *bec)
 812 {
 813         struct peak_usb_device *dev = netdev_priv(netdev);
 814         struct pcan_usb_fd_device *pdev =
 815                         container_of(dev, struct pcan_usb_fd_device, dev);
 816
 817         *bec = pdev->bec;
 818
 819         /* must return 0 */
 820         return 0;
 821 }
 822
 823 /* stop interface (last chance before set bus off) */
 824 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
 825 {
 826         struct pcan_usb_fd_device *pdev =
 827                         container_of(dev, struct pcan_usb_fd_device, dev);
 828
 829         /* turn off special msgs for that interface if no other dev opened */
 830         if (pdev->usb_if->dev_opened_count == 1)
 831                 pcan_usb_fd_set_options(dev, 0,
 832                                         PUCAN_OPTION_ERROR,
 833                                         PCAN_UFD_FLTEXT_CALIBRATION);
 834         pdev->usb_if->dev_opened_count--;
 835
 836         return 0;
 837 }
 838
 839 /* called when probing, to initialize a device object */
 840 static int pcan_usb_fd_init(struct peak_usb_device *dev)
 841 {
 842         struct pcan_usb_fd_device *pdev =
 843                         container_of(dev, struct pcan_usb_fd_device, dev);
 844         int i, err = -ENOMEM;
 845
 846         /* do this for 1st channel only */
 847         if (!dev->prev_siblings) {
 848                 /* allocate netdevices common structure attached to first one */
 849                 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
 850                 if (!pdev->usb_if)
 851                         goto err_out;
 852
 853                 /* allocate command buffer once for all for the interface */
 854                 pdev->cmd_buffer_addr = kmalloc(PCAN_UFD_CMD_BUFFER_SIZE,
 855                                                 GFP_KERNEL);
 856                 if (!pdev->cmd_buffer_addr)
 857                         goto err_out_1;
 858
 859                 /* number of ts msgs to ignore before taking one into account */
 860                 pdev->usb_if->cm_ignore_count = 5;
 861
 862                 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
 863                                             PCAN_USBPRO_INFO_FW,
 864                                             &pdev->usb_if->fw_info,
 865                                             sizeof(pdev->usb_if->fw_info));
 866                 if (err) {
 867                         dev_err(dev->netdev->dev.parent,
 868                                 "unable to read %s firmware info (err %d)\n",
 869                                 dev->adapter->name, err);
 870                         goto err_out_2;
 871                 }
 872
 873                 /* explicit use of dev_xxx() instead of netdev_xxx() here:
 874                  * information displayed are related to the device itself, not
 875                  * to the canx (channel) device.
 876                  */
 877                 dev_info(dev->netdev->dev.parent,
 878                          "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
 879                          dev->adapter->name, pdev->usb_if->fw_info.hw_version,
 880                          pdev->usb_if->fw_info.fw_version[0],
 881                          pdev->usb_if->fw_info.fw_version[1],
 882                          pdev->usb_if->fw_info.fw_version[2],
 883                          dev->adapter->ctrl_count);
 884
 885                 /* check for ability to switch between ISO/non-ISO modes */
 886                 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
 887                         /* firmware >= 2.x supports ISO/non-ISO switching */
 888                         dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 889                 } else {
 890                         /* firmware < 2.x only supports fixed(!) non-ISO */
 891                         dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
 892                 }
 893
 894                 /* tell the hardware the can driver is running */
 895                 err = pcan_usb_fd_drv_loaded(dev, 1);
 896                 if (err) {
 897                         dev_err(dev->netdev->dev.parent,
 898                                 "unable to tell %s driver is loaded (err %d)\n",
 899                                 dev->adapter->name, err);
 900                         goto err_out_2;
 901                 }
 902         } else {
 903                 /* otherwise, simply copy previous sibling's values */
 904                 struct pcan_usb_fd_device *ppdev =
 905                         container_of(dev->prev_siblings,
 906                                      struct pcan_usb_fd_device, dev);
 907
 908                 pdev->usb_if = ppdev->usb_if;
 909                 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
 910
 911                 /* do a copy of the ctrlmode[_supported] too */
 912                 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
 913                 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
 914         }
 915
 916         pdev->usb_if->dev[dev->ctrl_idx] = dev;
 917         dev->device_number =
 918                 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
 919
 920         /* set clock domain */
 921         for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
 922                 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
 923                         break;
 924
 925         if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
 926                 dev_warn(dev->netdev->dev.parent,
 927                          "incompatible clock frequencies\n");
 928                 err = -EINVAL;
 929                 goto err_out_2;
 930         }
 931
 932         pcan_usb_fd_set_clock_domain(dev, i);
 933
 934         /* set LED in default state (end of init phase) */
 935         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
 936
 937         return 0;
 938
 939 err_out_2:
 940         kfree(pdev->cmd_buffer_addr);
 941 err_out_1:
 942         kfree(pdev->usb_if);
 943 err_out:
 944         return err;
 945 }
 946
 947 /* called when driver module is being unloaded */
 948 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
 949 {
 950         struct pcan_usb_fd_device *pdev =
 951                         container_of(dev, struct pcan_usb_fd_device, dev);
 952
 953         /* when rmmod called before unplug and if down, should reset things
 954          * before leaving
 955          */
 956         if (dev->can.state != CAN_STATE_STOPPED) {
 957                 /* set bus off on the corresponding channel */
 958                 pcan_usb_fd_set_bus(dev, 0);
 959         }
 960
 961         /* switch off corresponding CAN LEDs */
 962         pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
 963
 964         /* if channel #0 (only) */
 965         if (dev->ctrl_idx == 0) {
 966                 /* turn off calibration message if any device were opened */
 967                 if (pdev->usb_if->dev_opened_count > 0)
 968                         pcan_usb_fd_set_options(dev, 0,
 969                                                 PUCAN_OPTION_ERROR,
 970                                                 PCAN_UFD_FLTEXT_CALIBRATION);
 971
 972                 /* tell USB adapter that the driver is being unloaded */
 973                 pcan_usb_fd_drv_loaded(dev, 0);
 974         }
 975 }
 976
 977 /* called when the USB adapter is unplugged */
 978 static void pcan_usb_fd_free(struct peak_usb_device *dev)
 979 {
 980         /* last device: can free shared objects now */
 981         if (!dev->prev_siblings && !dev->next_siblings) {
 982                 struct pcan_usb_fd_device *pdev =
 983                         container_of(dev, struct pcan_usb_fd_device, dev);
 984
 985                 /* free commands buffer */
 986                 kfree(pdev->cmd_buffer_addr);
 987
 988                 /* free usb interface object */
 989                 kfree(pdev->usb_if);
 990         }
 991 }
 992
 993 /* describes the PCAN-USB FD adapter */
 994 static const struct can_bittiming_const pcan_usb_fd_const = {
 995         .name = "pcan_usb_fd",
 996         .tseg1_min = 1,
 997         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
 998         .tseg2_min = 1,
 999         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1000         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1001         .brp_min = 1,
1002         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1003         .brp_inc = 1,
1004 };
1005
1006 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1007         .name = "pcan_usb_fd",
1008         .tseg1_min = 1,
1009         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1010         .tseg2_min = 1,
1011         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1012         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1013         .brp_min = 1,
1014         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1015         .brp_inc = 1,
1016 };
1017
1018 const struct peak_usb_adapter pcan_usb_fd = {
1019         .name = "PCAN-USB FD",
1020         .device_id = PCAN_USBFD_PRODUCT_ID,
1021         .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1022         .ctrlmode_supported = CAN_CTRLMODE_FD |
1023                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1024         .clock = {
1025                 .freq = PCAN_UFD_CRYSTAL_HZ,
1026         },
1027         .bittiming_const = &pcan_usb_fd_const,
1028         .data_bittiming_const = &pcan_usb_fd_data_const,
1029
1030         /* size of device private data */
1031         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1032
1033         /* timestamps usage */
1034         .ts_used_bits = 32,
1035         .ts_period = 1000000, /* calibration period in ts. */
1036         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1037         .us_per_ts_shift = 0,
1038
1039         /* give here messages in/out endpoints */
1040         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1041         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1042
1043         /* size of rx/tx usb buffers */
1044         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1045         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1046
1047         /* device callbacks */
1048         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1049         .dev_init = pcan_usb_fd_init,
1050
1051         .dev_exit = pcan_usb_fd_exit,
1052         .dev_free = pcan_usb_fd_free,
1053         .dev_set_bus = pcan_usb_fd_set_bus,
1054         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1055         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1056         .dev_decode_buf = pcan_usb_fd_decode_buf,
1057         .dev_start = pcan_usb_fd_start,
1058         .dev_stop = pcan_usb_fd_stop,
1059         .dev_restart_async = pcan_usb_fd_restart_async,
1060         .dev_encode_msg = pcan_usb_fd_encode_msg,
1061
1062         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1063 };
1064
1065 /* describes the PCAN-USB Pro FD adapter */
1066 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1067         .name = "pcan_usb_pro_fd",
1068         .tseg1_min = 1,
1069         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1070         .tseg2_min = 1,
1071         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1072         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1073         .brp_min = 1,
1074         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1075         .brp_inc = 1,
1076 };
1077
1078 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1079         .name = "pcan_usb_pro_fd",
1080         .tseg1_min = 1,
1081         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1082         .tseg2_min = 1,
1083         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1084         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1085         .brp_min = 1,
1086         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1087         .brp_inc = 1,
1088 };
1089
1090 const struct peak_usb_adapter pcan_usb_pro_fd = {
1091         .name = "PCAN-USB Pro FD",
1092         .device_id = PCAN_USBPROFD_PRODUCT_ID,
1093         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1094         .ctrlmode_supported = CAN_CTRLMODE_FD |
1095                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1096         .clock = {
1097                 .freq = PCAN_UFD_CRYSTAL_HZ,
1098         },
1099         .bittiming_const = &pcan_usb_pro_fd_const,
1100         .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1101
1102         /* size of device private data */
1103         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1104
1105         /* timestamps usage */
1106         .ts_used_bits = 32,
1107         .ts_period = 1000000, /* calibration period in ts. */
1108         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1109         .us_per_ts_shift = 0,
1110
1111         /* give here messages in/out endpoints */
1112         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1113         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1114
1115         /* size of rx/tx usb buffers */
1116         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1117         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1118
1119         /* device callbacks */
1120         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1121         .dev_init = pcan_usb_fd_init,
1122
1123         .dev_exit = pcan_usb_fd_exit,
1124         .dev_free = pcan_usb_fd_free,
1125         .dev_set_bus = pcan_usb_fd_set_bus,
1126         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1127         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1128         .dev_decode_buf = pcan_usb_fd_decode_buf,
1129         .dev_start = pcan_usb_fd_start,
1130         .dev_stop = pcan_usb_fd_stop,
1131         .dev_restart_async = pcan_usb_fd_restart_async,
1132         .dev_encode_msg = pcan_usb_fd_encode_msg,
1133
1134         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1135 };
1136
1137 /* describes the PCAN-USB X6 adapter */
1138 static const struct can_bittiming_const pcan_usb_x6_const = {
1139         .name = "pcan_usb_x6",
1140         .tseg1_min = 1,
1141         .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1142         .tseg2_min = 1,
1143         .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1144         .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1145         .brp_min = 1,
1146         .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1147         .brp_inc = 1,
1148 };
1149
1150 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1151         .name = "pcan_usb_x6",
1152         .tseg1_min = 1,
1153         .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1154         .tseg2_min = 1,
1155         .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1156         .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1157         .brp_min = 1,
1158         .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1159         .brp_inc = 1,
1160 };
1161
1162 const struct peak_usb_adapter pcan_usb_x6 = {
1163         .name = "PCAN-USB X6",
1164         .device_id = PCAN_USBX6_PRODUCT_ID,
1165         .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1166         .ctrlmode_supported = CAN_CTRLMODE_FD |
1167                         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1168         .clock = {
1169                 .freq = PCAN_UFD_CRYSTAL_HZ,
1170         },
1171         .bittiming_const = &pcan_usb_x6_const,
1172         .data_bittiming_const = &pcan_usb_x6_data_const,
1173
1174         /* size of device private data */
1175         .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1176
1177         /* timestamps usage */
1178         .ts_used_bits = 32,
1179         .ts_period = 1000000, /* calibration period in ts. */
1180         .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1181         .us_per_ts_shift = 0,
1182
1183         /* give here messages in/out endpoints */
1184         .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1185         .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1186
1187         /* size of rx/tx usb buffers */
1188         .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1189         .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1190
1191         /* device callbacks */
1192         .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
1193         .dev_init = pcan_usb_fd_init,
1194
1195         .dev_exit = pcan_usb_fd_exit,
1196         .dev_free = pcan_usb_fd_free,
1197         .dev_set_bus = pcan_usb_fd_set_bus,
1198         .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1199         .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1200         .dev_decode_buf = pcan_usb_fd_decode_buf,
1201         .dev_start = pcan_usb_fd_start,
1202         .dev_stop = pcan_usb_fd_stop,
1203         .dev_restart_async = pcan_usb_fd_restart_async,
1204         .dev_encode_msg = pcan_usb_fd_encode_msg,
1205
1206         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1207 };