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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
0004  *
0005  * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
0006  */
0007 #include <linux/netdevice.h>
0008 #include <linux/usb.h>
0009 #include <linux/module.h>
0010 #include <linux/ethtool.h>
0011 
0012 #include <linux/can.h>
0013 #include <linux/can/dev.h>
0014 #include <linux/can/error.h>
0015 #include <linux/can/dev/peak_canfd.h>
0016 
0017 #include "pcan_usb_core.h"
0018 #include "pcan_usb_pro.h"
0019 
0020 #define PCAN_USBPROFD_CHANNEL_COUNT 2
0021 #define PCAN_USBFD_CHANNEL_COUNT    1
0022 
0023 /* PCAN-USB Pro FD adapter internal clock (Hz) */
0024 #define PCAN_UFD_CRYSTAL_HZ     80000000
0025 
0026 #define PCAN_UFD_CMD_BUFFER_SIZE    512
0027 #define PCAN_UFD_LOSPD_PKT_SIZE     64
0028 
0029 /* PCAN-USB Pro FD command timeout (ms.) */
0030 #define PCAN_UFD_CMD_TIMEOUT_MS     1000
0031 
0032 /* PCAN-USB Pro FD rx/tx buffers size */
0033 #define PCAN_UFD_RX_BUFFER_SIZE     2048
0034 #define PCAN_UFD_TX_BUFFER_SIZE     512
0035 
0036 /* struct pcan_ufd_fw_info::type */
0037 #define PCAN_USBFD_TYPE_STD     1
0038 #define PCAN_USBFD_TYPE_EXT     2   /* includes EP numbers */
0039 
0040 /* read some versions info from the hw device */
0041 struct __packed pcan_ufd_fw_info {
0042     __le16  size_of;    /* sizeof this */
0043     __le16  type;       /* type of this structure */
0044     u8  hw_type;    /* Type of hardware (HW_TYPE_xxx) */
0045     u8  bl_version[3];  /* Bootloader version */
0046     u8  hw_version; /* Hardware version (PCB) */
0047     u8  fw_version[3];  /* Firmware version */
0048     __le32  dev_id[2];  /* "device id" per CAN */
0049     __le32  ser_no;     /* S/N */
0050     __le32  flags;      /* special functions */
0051 
0052     /* extended data when type == PCAN_USBFD_TYPE_EXT */
0053     u8  cmd_out_ep; /* ep for cmd */
0054     u8  cmd_in_ep;  /* ep for replies */
0055     u8  data_out_ep[2]; /* ep for CANx TX */
0056     u8  data_in_ep; /* ep for CAN RX */
0057     u8  dummy[3];
0058 };
0059 
0060 /* handle device specific info used by the netdevices */
0061 struct pcan_usb_fd_if {
0062     struct peak_usb_device  *dev[PCAN_USB_MAX_CHANNEL];
0063     struct pcan_ufd_fw_info fw_info;
0064     struct peak_time_ref    time_ref;
0065     int         cm_ignore_count;
0066     int         dev_opened_count;
0067 };
0068 
0069 /* device information */
0070 struct pcan_usb_fd_device {
0071     struct peak_usb_device  dev;
0072     struct can_berr_counter bec;
0073     struct pcan_usb_fd_if   *usb_if;
0074     u8          *cmd_buffer_addr;
0075 };
0076 
0077 /* Extended USB commands (non uCAN commands) */
0078 
0079 /* Clock Modes command */
0080 #define PCAN_UFD_CMD_CLK_SET        0x80
0081 
0082 #define PCAN_UFD_CLK_80MHZ      0x0
0083 #define PCAN_UFD_CLK_60MHZ      0x1
0084 #define PCAN_UFD_CLK_40MHZ      0x2
0085 #define PCAN_UFD_CLK_30MHZ      0x3
0086 #define PCAN_UFD_CLK_24MHZ      0x4
0087 #define PCAN_UFD_CLK_20MHZ      0x5
0088 #define PCAN_UFD_CLK_DEF        PCAN_UFD_CLK_80MHZ
0089 
0090 struct __packed pcan_ufd_clock {
0091     __le16  opcode_channel;
0092 
0093     u8  mode;
0094     u8  unused[5];
0095 };
0096 
0097 /* LED control command */
0098 #define PCAN_UFD_CMD_LED_SET        0x86
0099 
0100 #define PCAN_UFD_LED_DEV        0x00
0101 #define PCAN_UFD_LED_FAST       0x01
0102 #define PCAN_UFD_LED_SLOW       0x02
0103 #define PCAN_UFD_LED_ON         0x03
0104 #define PCAN_UFD_LED_OFF        0x04
0105 #define PCAN_UFD_LED_DEF        PCAN_UFD_LED_DEV
0106 
0107 struct __packed pcan_ufd_led {
0108     __le16  opcode_channel;
0109 
0110     u8  mode;
0111     u8  unused[5];
0112 };
0113 
0114 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
0115 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000
0116 
0117 struct __packed pcan_ufd_options {
0118     __le16  opcode_channel;
0119 
0120     __le16  ucan_mask;
0121     u16 unused;
0122     __le16  usb_mask;
0123 };
0124 
0125 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
0126 #define PCAN_UFD_MSG_CALIBRATION    0x100
0127 
0128 struct __packed pcan_ufd_ts_msg {
0129     __le16  size;
0130     __le16  type;
0131     __le32  ts_low;
0132     __le32  ts_high;
0133     __le16  usb_frame_index;
0134     u16 unused;
0135 };
0136 
0137 #define PCAN_UFD_MSG_OVERRUN        0x101
0138 
0139 #define PCAN_UFD_OVMSG_CHANNEL(o)   ((o)->channel & 0xf)
0140 
0141 struct __packed pcan_ufd_ovr_msg {
0142     __le16  size;
0143     __le16  type;
0144     __le32  ts_low;
0145     __le32  ts_high;
0146     u8  channel;
0147     u8  unused[3];
0148 };
0149 
0150 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
0151 {
0152     return om->channel & 0xf;
0153 }
0154 
0155 /* Clock mode frequency values */
0156 static const u32 pcan_usb_fd_clk_freq[6] = {
0157     [PCAN_UFD_CLK_80MHZ] = 80000000,
0158     [PCAN_UFD_CLK_60MHZ] = 60000000,
0159     [PCAN_UFD_CLK_40MHZ] = 40000000,
0160     [PCAN_UFD_CLK_30MHZ] = 30000000,
0161     [PCAN_UFD_CLK_24MHZ] = 24000000,
0162     [PCAN_UFD_CLK_20MHZ] = 20000000
0163 };
0164 
0165 /* return a device USB interface */
0166 static inline
0167 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
0168 {
0169     struct pcan_usb_fd_device *pdev =
0170             container_of(dev, struct pcan_usb_fd_device, dev);
0171     return pdev->usb_if;
0172 }
0173 
0174 /* return a device USB commands buffer */
0175 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
0176 {
0177     struct pcan_usb_fd_device *pdev =
0178             container_of(dev, struct pcan_usb_fd_device, dev);
0179     return pdev->cmd_buffer_addr;
0180 }
0181 
0182 /* send PCAN-USB Pro FD commands synchronously */
0183 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
0184 {
0185     struct pcan_usb_fd_device *pdev =
0186         container_of(dev, struct pcan_usb_fd_device, dev);
0187     struct pcan_ufd_fw_info *fw_info = &pdev->usb_if->fw_info;
0188     void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
0189     int err = 0;
0190     u8 *packet_ptr;
0191     int packet_len;
0192     ptrdiff_t cmd_len;
0193 
0194     /* usb device unregistered? */
0195     if (!(dev->state & PCAN_USB_STATE_CONNECTED))
0196         return 0;
0197 
0198     /* if a packet is not filled completely by commands, the command list
0199      * is terminated with an "end of collection" record.
0200      */
0201     cmd_len = cmd_tail - cmd_head;
0202     if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
0203         memset(cmd_tail, 0xff, sizeof(u64));
0204         cmd_len += sizeof(u64);
0205     }
0206 
0207     packet_ptr = cmd_head;
0208     packet_len = cmd_len;
0209 
0210     /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
0211     if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
0212         packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
0213 
0214     do {
0215         err = usb_bulk_msg(dev->udev,
0216                    usb_sndbulkpipe(dev->udev,
0217                            fw_info->cmd_out_ep),
0218                    packet_ptr, packet_len,
0219                    NULL, PCAN_UFD_CMD_TIMEOUT_MS);
0220         if (err) {
0221             netdev_err(dev->netdev,
0222                    "sending command failure: %d\n", err);
0223             break;
0224         }
0225 
0226         packet_ptr += packet_len;
0227         cmd_len -= packet_len;
0228 
0229         if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
0230             packet_len = cmd_len;
0231 
0232     } while (packet_len > 0);
0233 
0234     return err;
0235 }
0236 
0237 /* build the commands list in the given buffer, to enter operational mode */
0238 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
0239 {
0240     struct pucan_wr_err_cnt *prc;
0241     struct pucan_command *cmd;
0242     u8 *pc = buf;
0243 
0244     /* 1st, reset error counters: */
0245     prc = (struct pucan_wr_err_cnt *)pc;
0246     prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0247                                PUCAN_CMD_WR_ERR_CNT);
0248 
0249     /* select both counters */
0250     prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
0251 
0252     /* and reset their values */
0253     prc->tx_counter = 0;
0254     prc->rx_counter = 0;
0255 
0256     /* moves the pointer forward */
0257     pc += sizeof(struct pucan_wr_err_cnt);
0258 
0259     /* add command to switch from ISO to non-ISO mode, if fw allows it */
0260     if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
0261         struct pucan_options *puo = (struct pucan_options *)pc;
0262 
0263         puo->opcode_channel =
0264             (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
0265             pucan_cmd_opcode_channel(dev->ctrl_idx,
0266                          PUCAN_CMD_CLR_DIS_OPTION) :
0267             pucan_cmd_opcode_channel(dev->ctrl_idx,
0268                          PUCAN_CMD_SET_EN_OPTION);
0269 
0270         puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
0271 
0272         /* to be sure that no other extended bits will be taken into
0273          * account
0274          */
0275         puo->unused = 0;
0276 
0277         /* moves the pointer forward */
0278         pc += sizeof(struct pucan_options);
0279     }
0280 
0281     /* next, go back to operational mode */
0282     cmd = (struct pucan_command *)pc;
0283     cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0284                 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
0285                         PUCAN_CMD_LISTEN_ONLY_MODE :
0286                         PUCAN_CMD_NORMAL_MODE);
0287     pc += sizeof(struct pucan_command);
0288 
0289     return pc - buf;
0290 }
0291 
0292 /* set CAN bus on/off */
0293 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
0294 {
0295     u8 *pc = pcan_usb_fd_cmd_buffer(dev);
0296     int l;
0297 
0298     if (onoff) {
0299         /* build the cmds list to enter operational mode */
0300         l = pcan_usb_fd_build_restart_cmd(dev, pc);
0301     } else {
0302         struct pucan_command *cmd = (struct pucan_command *)pc;
0303 
0304         /* build cmd to go back to reset mode */
0305         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0306                             PUCAN_CMD_RESET_MODE);
0307         l = sizeof(struct pucan_command);
0308     }
0309 
0310     /* send the command */
0311     return pcan_usb_fd_send_cmd(dev, pc + l);
0312 }
0313 
0314 /* set filtering masks:
0315  *
0316  *  idx  in range [0..63] selects a row #idx, all rows otherwise
0317  *  mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
0318  *
0319  *  Each bit of this 64 x 32 bits array defines a CANID value:
0320  *
0321  *  bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
0322  *  bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
0323  */
0324 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
0325                       u32 mask)
0326 {
0327     struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
0328     int i, n;
0329 
0330     /* select all rows when idx is out of range [0..63] */
0331     if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
0332         n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
0333         idx = 0;
0334 
0335     /* select the row (and only the row) otherwise */
0336     } else {
0337         n = idx + 1;
0338     }
0339 
0340     for (i = idx; i < n; i++, cmd++) {
0341         cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0342                             PUCAN_CMD_FILTER_STD);
0343         cmd->idx = cpu_to_le16(i);
0344         cmd->mask = cpu_to_le32(mask);
0345     }
0346 
0347     /* send the command */
0348     return pcan_usb_fd_send_cmd(dev, cmd);
0349 }
0350 
0351 /* set/unset options
0352  *
0353  *  onoff   set(1)/unset(0) options
0354  *  mask    each bit defines a kind of options to set/unset
0355  */
0356 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
0357                    bool onoff, u16 ucan_mask, u16 usb_mask)
0358 {
0359     struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
0360 
0361     cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0362                     (onoff) ? PUCAN_CMD_SET_EN_OPTION :
0363                           PUCAN_CMD_CLR_DIS_OPTION);
0364 
0365     cmd->ucan_mask = cpu_to_le16(ucan_mask);
0366     cmd->usb_mask = cpu_to_le16(usb_mask);
0367 
0368     /* send the command */
0369     return pcan_usb_fd_send_cmd(dev, ++cmd);
0370 }
0371 
0372 /* setup LED control */
0373 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
0374 {
0375     struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
0376 
0377     cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0378                                PCAN_UFD_CMD_LED_SET);
0379     cmd->mode = led_mode;
0380 
0381     /* send the command */
0382     return pcan_usb_fd_send_cmd(dev, ++cmd);
0383 }
0384 
0385 /* set CAN clock domain */
0386 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
0387                     u8 clk_mode)
0388 {
0389     struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
0390 
0391     cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0392                                PCAN_UFD_CMD_CLK_SET);
0393     cmd->mode = clk_mode;
0394 
0395     /* send the command */
0396     return pcan_usb_fd_send_cmd(dev, ++cmd);
0397 }
0398 
0399 /* set bittiming for CAN and CAN-FD header */
0400 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
0401                       struct can_bittiming *bt)
0402 {
0403     struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
0404 
0405     cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0406                                PUCAN_CMD_TIMING_SLOW);
0407     cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
0408                 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
0409 
0410     cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
0411     cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
0412     cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
0413 
0414     cmd->ewl = 96;  /* default */
0415 
0416     /* send the command */
0417     return pcan_usb_fd_send_cmd(dev, ++cmd);
0418 }
0419 
0420 /* set CAN-FD bittiming for data */
0421 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
0422                       struct can_bittiming *bt)
0423 {
0424     struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
0425 
0426     cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
0427                                PUCAN_CMD_TIMING_FAST);
0428     cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
0429     cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
0430     cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
0431     cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
0432 
0433     /* send the command */
0434     return pcan_usb_fd_send_cmd(dev, ++cmd);
0435 }
0436 
0437 /* handle restart but in asynchronously way
0438  * (uses PCAN-USB Pro code to complete asynchronous request)
0439  */
0440 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
0441                      struct urb *urb, u8 *buf)
0442 {
0443     struct pcan_usb_fd_device *pdev =
0444         container_of(dev, struct pcan_usb_fd_device, dev);
0445     struct pcan_ufd_fw_info *fw_info = &pdev->usb_if->fw_info;
0446     u8 *pc = buf;
0447 
0448     /* build the entire cmds list in the provided buffer, to go back into
0449      * operational mode.
0450      */
0451     pc += pcan_usb_fd_build_restart_cmd(dev, pc);
0452 
0453     /* add EOC */
0454     memset(pc, 0xff, sizeof(struct pucan_command));
0455     pc += sizeof(struct pucan_command);
0456 
0457     /* complete the URB */
0458     usb_fill_bulk_urb(urb, dev->udev,
0459               usb_sndbulkpipe(dev->udev, fw_info->cmd_out_ep),
0460               buf, pc - buf,
0461               pcan_usb_pro_restart_complete, dev);
0462 
0463     /* and submit it. */
0464     return usb_submit_urb(urb, GFP_ATOMIC);
0465 }
0466 
0467 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
0468 {
0469     struct pcan_usb_fd_device *pdev =
0470             container_of(dev, struct pcan_usb_fd_device, dev);
0471 
0472     pdev->cmd_buffer_addr[0] = 0;
0473     pdev->cmd_buffer_addr[1] = !!loaded;
0474 
0475     return pcan_usb_pro_send_req(dev,
0476                 PCAN_USBPRO_REQ_FCT,
0477                 PCAN_USBPRO_FCT_DRVLD,
0478                 pdev->cmd_buffer_addr,
0479                 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
0480 }
0481 
0482 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
0483                      struct pucan_msg *rx_msg)
0484 {
0485     struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
0486     struct peak_usb_device *dev;
0487     struct net_device *netdev;
0488     struct canfd_frame *cfd;
0489     struct sk_buff *skb;
0490     const u16 rx_msg_flags = le16_to_cpu(rm->flags);
0491 
0492     if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
0493         return -ENOMEM;
0494 
0495     dev = usb_if->dev[pucan_msg_get_channel(rm)];
0496     netdev = dev->netdev;
0497 
0498     if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
0499         /* CANFD frame case */
0500         skb = alloc_canfd_skb(netdev, &cfd);
0501         if (!skb)
0502             return -ENOMEM;
0503 
0504         if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
0505             cfd->flags |= CANFD_BRS;
0506 
0507         if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
0508             cfd->flags |= CANFD_ESI;
0509 
0510         cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
0511     } else {
0512         /* CAN 2.0 frame case */
0513         skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
0514         if (!skb)
0515             return -ENOMEM;
0516 
0517         can_frame_set_cc_len((struct can_frame *)cfd,
0518                      pucan_msg_get_dlc(rm),
0519                      dev->can.ctrlmode);
0520     }
0521 
0522     cfd->can_id = le32_to_cpu(rm->can_id);
0523 
0524     if (rx_msg_flags & PUCAN_MSG_EXT_ID)
0525         cfd->can_id |= CAN_EFF_FLAG;
0526 
0527     if (rx_msg_flags & PUCAN_MSG_RTR) {
0528         cfd->can_id |= CAN_RTR_FLAG;
0529     } else {
0530         memcpy(cfd->data, rm->d, cfd->len);
0531         netdev->stats.rx_bytes += cfd->len;
0532     }
0533     netdev->stats.rx_packets++;
0534 
0535     peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low),
0536                  le32_to_cpu(rm->ts_high));
0537 
0538     return 0;
0539 }
0540 
0541 /* handle uCAN status message */
0542 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
0543                      struct pucan_msg *rx_msg)
0544 {
0545     struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
0546     struct pcan_usb_fd_device *pdev;
0547     enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
0548     enum can_state rx_state, tx_state;
0549     struct peak_usb_device *dev;
0550     struct net_device *netdev;
0551     struct can_frame *cf;
0552     struct sk_buff *skb;
0553 
0554     if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
0555         return -ENOMEM;
0556 
0557     dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
0558     pdev = container_of(dev, struct pcan_usb_fd_device, dev);
0559     netdev = dev->netdev;
0560 
0561     /* nothing should be sent while in BUS_OFF state */
0562     if (dev->can.state == CAN_STATE_BUS_OFF)
0563         return 0;
0564 
0565     if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
0566         new_state = CAN_STATE_BUS_OFF;
0567     } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
0568         new_state = CAN_STATE_ERROR_PASSIVE;
0569     } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
0570         new_state = CAN_STATE_ERROR_WARNING;
0571     } else {
0572         /* back to (or still in) ERROR_ACTIVE state */
0573         new_state = CAN_STATE_ERROR_ACTIVE;
0574         pdev->bec.txerr = 0;
0575         pdev->bec.rxerr = 0;
0576     }
0577 
0578     /* state hasn't changed */
0579     if (new_state == dev->can.state)
0580         return 0;
0581 
0582     /* handle bus state change */
0583     tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
0584     rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
0585 
0586     /* allocate an skb to store the error frame */
0587     skb = alloc_can_err_skb(netdev, &cf);
0588     can_change_state(netdev, cf, tx_state, rx_state);
0589 
0590     /* things must be done even in case of OOM */
0591     if (new_state == CAN_STATE_BUS_OFF)
0592         can_bus_off(netdev);
0593 
0594     if (!skb)
0595         return -ENOMEM;
0596 
0597     peak_usb_netif_rx_64(skb, le32_to_cpu(sm->ts_low),
0598                  le32_to_cpu(sm->ts_high));
0599 
0600     return 0;
0601 }
0602 
0603 /* handle uCAN error message */
0604 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
0605                     struct pucan_msg *rx_msg)
0606 {
0607     struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
0608     struct pcan_usb_fd_device *pdev;
0609     struct peak_usb_device *dev;
0610 
0611     if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
0612         return -EINVAL;
0613 
0614     dev = usb_if->dev[pucan_ermsg_get_channel(er)];
0615     pdev = container_of(dev, struct pcan_usb_fd_device, dev);
0616 
0617     /* keep a trace of tx and rx error counters for later use */
0618     pdev->bec.txerr = er->tx_err_cnt;
0619     pdev->bec.rxerr = er->rx_err_cnt;
0620 
0621     return 0;
0622 }
0623 
0624 /* handle uCAN overrun message */
0625 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
0626                       struct pucan_msg *rx_msg)
0627 {
0628     struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
0629     struct peak_usb_device *dev;
0630     struct net_device *netdev;
0631     struct can_frame *cf;
0632     struct sk_buff *skb;
0633 
0634     if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
0635         return -EINVAL;
0636 
0637     dev = usb_if->dev[pufd_omsg_get_channel(ov)];
0638     netdev = dev->netdev;
0639 
0640     /* allocate an skb to store the error frame */
0641     skb = alloc_can_err_skb(netdev, &cf);
0642     if (!skb)
0643         return -ENOMEM;
0644 
0645     cf->can_id |= CAN_ERR_CRTL;
0646     cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
0647 
0648     peak_usb_netif_rx_64(skb, le32_to_cpu(ov->ts_low),
0649                  le32_to_cpu(ov->ts_high));
0650 
0651     netdev->stats.rx_over_errors++;
0652     netdev->stats.rx_errors++;
0653 
0654     return 0;
0655 }
0656 
0657 /* handle USB calibration message */
0658 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
0659                   struct pucan_msg *rx_msg)
0660 {
0661     struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
0662 
0663     /* should wait until clock is stabilized */
0664     if (usb_if->cm_ignore_count > 0)
0665         usb_if->cm_ignore_count--;
0666     else
0667         peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
0668 }
0669 
0670 /* callback for bulk IN urb */
0671 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
0672 {
0673     struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
0674     struct net_device *netdev = dev->netdev;
0675     struct pucan_msg *rx_msg;
0676     u8 *msg_ptr, *msg_end;
0677     int err = 0;
0678 
0679     /* loop reading all the records from the incoming message */
0680     msg_ptr = urb->transfer_buffer;
0681     msg_end = urb->transfer_buffer + urb->actual_length;
0682     for (; msg_ptr < msg_end;) {
0683         u16 rx_msg_type, rx_msg_size;
0684 
0685         rx_msg = (struct pucan_msg *)msg_ptr;
0686         if (!rx_msg->size) {
0687             /* null packet found: end of list */
0688             break;
0689         }
0690 
0691         rx_msg_size = le16_to_cpu(rx_msg->size);
0692         rx_msg_type = le16_to_cpu(rx_msg->type);
0693 
0694         /* check if the record goes out of current packet */
0695         if (msg_ptr + rx_msg_size > msg_end) {
0696             netdev_err(netdev,
0697                    "got frag rec: should inc usb rx buf sze\n");
0698             err = -EBADMSG;
0699             break;
0700         }
0701 
0702         switch (rx_msg_type) {
0703         case PUCAN_MSG_CAN_RX:
0704             err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
0705             if (err < 0)
0706                 goto fail;
0707             break;
0708 
0709         case PCAN_UFD_MSG_CALIBRATION:
0710             pcan_usb_fd_decode_ts(usb_if, rx_msg);
0711             break;
0712 
0713         case PUCAN_MSG_ERROR:
0714             err = pcan_usb_fd_decode_error(usb_if, rx_msg);
0715             if (err < 0)
0716                 goto fail;
0717             break;
0718 
0719         case PUCAN_MSG_STATUS:
0720             err = pcan_usb_fd_decode_status(usb_if, rx_msg);
0721             if (err < 0)
0722                 goto fail;
0723             break;
0724 
0725         case PCAN_UFD_MSG_OVERRUN:
0726             err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
0727             if (err < 0)
0728                 goto fail;
0729             break;
0730 
0731         default:
0732             netdev_err(netdev,
0733                    "unhandled msg type 0x%02x (%d): ignored\n",
0734                    rx_msg_type, rx_msg_type);
0735             break;
0736         }
0737 
0738         msg_ptr += rx_msg_size;
0739     }
0740 
0741 fail:
0742     if (err)
0743         pcan_dump_mem("received msg",
0744                   urb->transfer_buffer, urb->actual_length);
0745     return err;
0746 }
0747 
0748 /* CAN/CANFD frames encoding callback */
0749 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
0750                   struct sk_buff *skb, u8 *obuf, size_t *size)
0751 {
0752     struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
0753     struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
0754     u16 tx_msg_size, tx_msg_flags;
0755     u8 dlc;
0756 
0757     if (cfd->len > CANFD_MAX_DLEN)
0758         return -EINVAL;
0759 
0760     tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
0761     tx_msg->size = cpu_to_le16(tx_msg_size);
0762     tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
0763 
0764     tx_msg_flags = 0;
0765     if (cfd->can_id & CAN_EFF_FLAG) {
0766         tx_msg_flags |= PUCAN_MSG_EXT_ID;
0767         tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
0768     } else {
0769         tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
0770     }
0771 
0772     if (can_is_canfd_skb(skb)) {
0773         /* considering a CANFD frame */
0774         dlc = can_fd_len2dlc(cfd->len);
0775 
0776         tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
0777 
0778         if (cfd->flags & CANFD_BRS)
0779             tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
0780 
0781         if (cfd->flags & CANFD_ESI)
0782             tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
0783     } else {
0784         /* CAND 2.0 frames */
0785         dlc = can_get_cc_dlc((struct can_frame *)cfd,
0786                      dev->can.ctrlmode);
0787 
0788         if (cfd->can_id & CAN_RTR_FLAG)
0789             tx_msg_flags |= PUCAN_MSG_RTR;
0790     }
0791 
0792     /* Single-Shot frame */
0793     if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
0794         tx_msg_flags |= PUCAN_MSG_SINGLE_SHOT;
0795 
0796     tx_msg->flags = cpu_to_le16(tx_msg_flags);
0797     tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc);
0798     memcpy(tx_msg->d, cfd->data, cfd->len);
0799 
0800     /* add null size message to tag the end (messages are 32-bits aligned)
0801      */
0802     tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
0803 
0804     tx_msg->size = 0;
0805 
0806     /* set the whole size of the USB packet to send */
0807     *size = tx_msg_size + sizeof(u32);
0808 
0809     return 0;
0810 }
0811 
0812 /* start the interface (last chance before set bus on) */
0813 static int pcan_usb_fd_start(struct peak_usb_device *dev)
0814 {
0815     struct pcan_usb_fd_device *pdev =
0816             container_of(dev, struct pcan_usb_fd_device, dev);
0817     int err;
0818 
0819     /* set filter mode: all acceptance */
0820     err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
0821     if (err)
0822         return err;
0823 
0824     /* opening first device: */
0825     if (pdev->usb_if->dev_opened_count == 0) {
0826         /* reset time_ref */
0827         peak_usb_init_time_ref(&pdev->usb_if->time_ref,
0828                        &pcan_usb_pro_fd);
0829 
0830         /* enable USB calibration messages */
0831         err = pcan_usb_fd_set_options(dev, 1,
0832                           PUCAN_OPTION_ERROR,
0833                           PCAN_UFD_FLTEXT_CALIBRATION);
0834     }
0835 
0836     pdev->usb_if->dev_opened_count++;
0837 
0838     /* reset cached error counters */
0839     pdev->bec.txerr = 0;
0840     pdev->bec.rxerr = 0;
0841 
0842     return err;
0843 }
0844 
0845 /* socket callback used to copy berr counters values received through USB */
0846 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
0847                     struct can_berr_counter *bec)
0848 {
0849     struct peak_usb_device *dev = netdev_priv(netdev);
0850     struct pcan_usb_fd_device *pdev =
0851             container_of(dev, struct pcan_usb_fd_device, dev);
0852 
0853     *bec = pdev->bec;
0854 
0855     /* must return 0 */
0856     return 0;
0857 }
0858 
0859 /* probe function for all PCAN-USB FD family usb interfaces */
0860 static int pcan_usb_fd_probe(struct usb_interface *intf)
0861 {
0862     struct usb_host_interface *iface_desc = &intf->altsetting[0];
0863 
0864     /* CAN interface is always interface #0 */
0865     return iface_desc->desc.bInterfaceNumber;
0866 }
0867 
0868 /* stop interface (last chance before set bus off) */
0869 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
0870 {
0871     struct pcan_usb_fd_device *pdev =
0872             container_of(dev, struct pcan_usb_fd_device, dev);
0873 
0874     /* turn off special msgs for that interface if no other dev opened */
0875     if (pdev->usb_if->dev_opened_count == 1)
0876         pcan_usb_fd_set_options(dev, 0,
0877                     PUCAN_OPTION_ERROR,
0878                     PCAN_UFD_FLTEXT_CALIBRATION);
0879     pdev->usb_if->dev_opened_count--;
0880 
0881     return 0;
0882 }
0883 
0884 /* called when probing, to initialize a device object */
0885 static int pcan_usb_fd_init(struct peak_usb_device *dev)
0886 {
0887     struct pcan_usb_fd_device *pdev =
0888             container_of(dev, struct pcan_usb_fd_device, dev);
0889     struct pcan_ufd_fw_info *fw_info;
0890     int i, err = -ENOMEM;
0891 
0892     /* do this for 1st channel only */
0893     if (!dev->prev_siblings) {
0894         /* allocate netdevices common structure attached to first one */
0895         pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
0896         if (!pdev->usb_if)
0897             goto err_out;
0898 
0899         /* allocate command buffer once for all for the interface */
0900         pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
0901                         GFP_KERNEL);
0902         if (!pdev->cmd_buffer_addr)
0903             goto err_out_1;
0904 
0905         /* number of ts msgs to ignore before taking one into account */
0906         pdev->usb_if->cm_ignore_count = 5;
0907 
0908         fw_info = &pdev->usb_if->fw_info;
0909 
0910         err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
0911                         PCAN_USBPRO_INFO_FW,
0912                         fw_info,
0913                         sizeof(*fw_info));
0914         if (err) {
0915             dev_err(dev->netdev->dev.parent,
0916                 "unable to read %s firmware info (err %d)\n",
0917                 dev->adapter->name, err);
0918             goto err_out_2;
0919         }
0920 
0921         /* explicit use of dev_xxx() instead of netdev_xxx() here:
0922          * information displayed are related to the device itself, not
0923          * to the canx (channel) device.
0924          */
0925         dev_info(dev->netdev->dev.parent,
0926              "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
0927              dev->adapter->name, fw_info->hw_version,
0928              fw_info->fw_version[0],
0929              fw_info->fw_version[1],
0930              fw_info->fw_version[2],
0931              dev->adapter->ctrl_count);
0932 
0933         /* check for ability to switch between ISO/non-ISO modes */
0934         if (fw_info->fw_version[0] >= 2) {
0935             /* firmware >= 2.x supports ISO/non-ISO switching */
0936             dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
0937         } else {
0938             /* firmware < 2.x only supports fixed(!) non-ISO */
0939             dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
0940         }
0941 
0942         /* if vendor rsp is of type 2, then it contains EP numbers to
0943          * use for cmds pipes. If not, then default EP should be used.
0944          */
0945         if (fw_info->type != cpu_to_le16(PCAN_USBFD_TYPE_EXT)) {
0946             fw_info->cmd_out_ep = PCAN_USBPRO_EP_CMDOUT;
0947             fw_info->cmd_in_ep = PCAN_USBPRO_EP_CMDIN;
0948         }
0949 
0950         /* tell the hardware the can driver is running */
0951         err = pcan_usb_fd_drv_loaded(dev, 1);
0952         if (err) {
0953             dev_err(dev->netdev->dev.parent,
0954                 "unable to tell %s driver is loaded (err %d)\n",
0955                 dev->adapter->name, err);
0956             goto err_out_2;
0957         }
0958     } else {
0959         /* otherwise, simply copy previous sibling's values */
0960         struct pcan_usb_fd_device *ppdev =
0961             container_of(dev->prev_siblings,
0962                      struct pcan_usb_fd_device, dev);
0963 
0964         pdev->usb_if = ppdev->usb_if;
0965         pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
0966 
0967         /* do a copy of the ctrlmode[_supported] too */
0968         dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
0969         dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
0970 
0971         fw_info = &pdev->usb_if->fw_info;
0972     }
0973 
0974     pdev->usb_if->dev[dev->ctrl_idx] = dev;
0975     dev->device_number =
0976         le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
0977 
0978     /* if vendor rsp is of type 2, then it contains EP numbers to
0979      * use for data pipes. If not, then statically defined EP are used
0980      * (see peak_usb_create_dev()).
0981      */
0982     if (fw_info->type == cpu_to_le16(PCAN_USBFD_TYPE_EXT)) {
0983         dev->ep_msg_in = fw_info->data_in_ep;
0984         dev->ep_msg_out = fw_info->data_out_ep[dev->ctrl_idx];
0985     }
0986 
0987     /* set clock domain */
0988     for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
0989         if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
0990             break;
0991 
0992     if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
0993         dev_warn(dev->netdev->dev.parent,
0994              "incompatible clock frequencies\n");
0995         err = -EINVAL;
0996         goto err_out_2;
0997     }
0998 
0999     pcan_usb_fd_set_clock_domain(dev, i);
1000 
1001     /* set LED in default state (end of init phase) */
1002     pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1003 
1004     return 0;
1005 
1006 err_out_2:
1007     kfree(pdev->cmd_buffer_addr);
1008 err_out_1:
1009     kfree(pdev->usb_if);
1010 err_out:
1011     return err;
1012 }
1013 
1014 /* called when driver module is being unloaded */
1015 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
1016 {
1017     struct pcan_usb_fd_device *pdev =
1018             container_of(dev, struct pcan_usb_fd_device, dev);
1019 
1020     /* when rmmod called before unplug and if down, should reset things
1021      * before leaving
1022      */
1023     if (dev->can.state != CAN_STATE_STOPPED) {
1024         /* set bus off on the corresponding channel */
1025         pcan_usb_fd_set_bus(dev, 0);
1026     }
1027 
1028     /* switch off corresponding CAN LEDs */
1029     pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
1030 
1031     /* if channel #0 (only) */
1032     if (dev->ctrl_idx == 0) {
1033         /* turn off calibration message if any device were opened */
1034         if (pdev->usb_if->dev_opened_count > 0)
1035             pcan_usb_fd_set_options(dev, 0,
1036                         PUCAN_OPTION_ERROR,
1037                         PCAN_UFD_FLTEXT_CALIBRATION);
1038 
1039         /* tell USB adapter that the driver is being unloaded */
1040         pcan_usb_fd_drv_loaded(dev, 0);
1041     }
1042 }
1043 
1044 /* called when the USB adapter is unplugged */
1045 static void pcan_usb_fd_free(struct peak_usb_device *dev)
1046 {
1047     /* last device: can free shared objects now */
1048     if (!dev->prev_siblings && !dev->next_siblings) {
1049         struct pcan_usb_fd_device *pdev =
1050             container_of(dev, struct pcan_usb_fd_device, dev);
1051 
1052         /* free commands buffer */
1053         kfree(pdev->cmd_buffer_addr);
1054 
1055         /* free usb interface object */
1056         kfree(pdev->usb_if);
1057     }
1058 }
1059 
1060 /* blink LED's */
1061 static int pcan_usb_fd_set_phys_id(struct net_device *netdev,
1062                    enum ethtool_phys_id_state state)
1063 {
1064     struct peak_usb_device *dev = netdev_priv(netdev);
1065     int err = 0;
1066 
1067     switch (state) {
1068     case ETHTOOL_ID_ACTIVE:
1069         err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_FAST);
1070         break;
1071     case ETHTOOL_ID_INACTIVE:
1072         err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1073         break;
1074     default:
1075         break;
1076     }
1077 
1078     return err;
1079 }
1080 
1081 static const struct ethtool_ops pcan_usb_fd_ethtool_ops = {
1082     .set_phys_id = pcan_usb_fd_set_phys_id,
1083     .get_ts_info = pcan_get_ts_info,
1084 };
1085 
1086 /* describes the PCAN-USB FD adapter */
1087 static const struct can_bittiming_const pcan_usb_fd_const = {
1088     .name = "pcan_usb_fd",
1089     .tseg1_min = 1,
1090     .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1091     .tseg2_min = 1,
1092     .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1093     .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1094     .brp_min = 1,
1095     .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1096     .brp_inc = 1,
1097 };
1098 
1099 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1100     .name = "pcan_usb_fd",
1101     .tseg1_min = 1,
1102     .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1103     .tseg2_min = 1,
1104     .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1105     .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1106     .brp_min = 1,
1107     .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1108     .brp_inc = 1,
1109 };
1110 
1111 const struct peak_usb_adapter pcan_usb_fd = {
1112     .name = "PCAN-USB FD",
1113     .device_id = PCAN_USBFD_PRODUCT_ID,
1114     .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1115     .ctrlmode_supported = CAN_CTRLMODE_FD |
1116             CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1117             CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1118     .clock = {
1119         .freq = PCAN_UFD_CRYSTAL_HZ,
1120     },
1121     .bittiming_const = &pcan_usb_fd_const,
1122     .data_bittiming_const = &pcan_usb_fd_data_const,
1123 
1124     /* size of device private data */
1125     .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1126 
1127     .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1128 
1129     /* timestamps usage */
1130     .ts_used_bits = 32,
1131     .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1132     .us_per_ts_shift = 0,
1133 
1134     /* give here messages in/out endpoints */
1135     .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1136     .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1137 
1138     /* size of rx/tx usb buffers */
1139     .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1140     .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1141 
1142     /* device callbacks */
1143     .intf_probe = pcan_usb_fd_probe,
1144     .dev_init = pcan_usb_fd_init,
1145 
1146     .dev_exit = pcan_usb_fd_exit,
1147     .dev_free = pcan_usb_fd_free,
1148     .dev_set_bus = pcan_usb_fd_set_bus,
1149     .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1150     .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1151     .dev_decode_buf = pcan_usb_fd_decode_buf,
1152     .dev_start = pcan_usb_fd_start,
1153     .dev_stop = pcan_usb_fd_stop,
1154     .dev_restart_async = pcan_usb_fd_restart_async,
1155     .dev_encode_msg = pcan_usb_fd_encode_msg,
1156 
1157     .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1158 };
1159 
1160 /* describes the PCAN-CHIP USB */
1161 static const struct can_bittiming_const pcan_usb_chip_const = {
1162     .name = "pcan_chip_usb",
1163     .tseg1_min = 1,
1164     .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1165     .tseg2_min = 1,
1166     .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1167     .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1168     .brp_min = 1,
1169     .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1170     .brp_inc = 1,
1171 };
1172 
1173 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1174     .name = "pcan_chip_usb",
1175     .tseg1_min = 1,
1176     .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1177     .tseg2_min = 1,
1178     .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1179     .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1180     .brp_min = 1,
1181     .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1182     .brp_inc = 1,
1183 };
1184 
1185 const struct peak_usb_adapter pcan_usb_chip = {
1186     .name = "PCAN-Chip USB",
1187     .device_id = PCAN_USBCHIP_PRODUCT_ID,
1188     .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1189     .ctrlmode_supported = CAN_CTRLMODE_FD |
1190         CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1191         CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1192     .clock = {
1193         .freq = PCAN_UFD_CRYSTAL_HZ,
1194     },
1195     .bittiming_const = &pcan_usb_chip_const,
1196     .data_bittiming_const = &pcan_usb_chip_data_const,
1197 
1198     /* size of device private data */
1199     .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1200 
1201     .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1202 
1203     /* timestamps usage */
1204     .ts_used_bits = 32,
1205     .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1206     .us_per_ts_shift = 0,
1207 
1208     /* give here messages in/out endpoints */
1209     .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1210     .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1211 
1212     /* size of rx/tx usb buffers */
1213     .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1214     .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1215 
1216     /* device callbacks */
1217     .intf_probe = pcan_usb_pro_probe,   /* same as PCAN-USB Pro */
1218     .dev_init = pcan_usb_fd_init,
1219 
1220     .dev_exit = pcan_usb_fd_exit,
1221     .dev_free = pcan_usb_fd_free,
1222     .dev_set_bus = pcan_usb_fd_set_bus,
1223     .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1224     .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1225     .dev_decode_buf = pcan_usb_fd_decode_buf,
1226     .dev_start = pcan_usb_fd_start,
1227     .dev_stop = pcan_usb_fd_stop,
1228     .dev_restart_async = pcan_usb_fd_restart_async,
1229     .dev_encode_msg = pcan_usb_fd_encode_msg,
1230 
1231     .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1232 };
1233 
1234 /* describes the PCAN-USB Pro FD adapter */
1235 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1236     .name = "pcan_usb_pro_fd",
1237     .tseg1_min = 1,
1238     .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1239     .tseg2_min = 1,
1240     .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1241     .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1242     .brp_min = 1,
1243     .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1244     .brp_inc = 1,
1245 };
1246 
1247 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1248     .name = "pcan_usb_pro_fd",
1249     .tseg1_min = 1,
1250     .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1251     .tseg2_min = 1,
1252     .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1253     .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1254     .brp_min = 1,
1255     .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1256     .brp_inc = 1,
1257 };
1258 
1259 const struct peak_usb_adapter pcan_usb_pro_fd = {
1260     .name = "PCAN-USB Pro FD",
1261     .device_id = PCAN_USBPROFD_PRODUCT_ID,
1262     .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1263     .ctrlmode_supported = CAN_CTRLMODE_FD |
1264             CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1265             CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1266     .clock = {
1267         .freq = PCAN_UFD_CRYSTAL_HZ,
1268     },
1269     .bittiming_const = &pcan_usb_pro_fd_const,
1270     .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1271 
1272     /* size of device private data */
1273     .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1274 
1275     .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1276 
1277     /* timestamps usage */
1278     .ts_used_bits = 32,
1279     .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1280     .us_per_ts_shift = 0,
1281 
1282     /* give here messages in/out endpoints */
1283     .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1284     .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1285 
1286     /* size of rx/tx usb buffers */
1287     .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1288     .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1289 
1290     /* device callbacks */
1291     .intf_probe = pcan_usb_pro_probe,   /* same as PCAN-USB Pro */
1292     .dev_init = pcan_usb_fd_init,
1293 
1294     .dev_exit = pcan_usb_fd_exit,
1295     .dev_free = pcan_usb_fd_free,
1296     .dev_set_bus = pcan_usb_fd_set_bus,
1297     .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1298     .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1299     .dev_decode_buf = pcan_usb_fd_decode_buf,
1300     .dev_start = pcan_usb_fd_start,
1301     .dev_stop = pcan_usb_fd_stop,
1302     .dev_restart_async = pcan_usb_fd_restart_async,
1303     .dev_encode_msg = pcan_usb_fd_encode_msg,
1304 
1305     .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1306 };
1307 
1308 /* describes the PCAN-USB X6 adapter */
1309 static const struct can_bittiming_const pcan_usb_x6_const = {
1310     .name = "pcan_usb_x6",
1311     .tseg1_min = 1,
1312     .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1313     .tseg2_min = 1,
1314     .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1315     .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1316     .brp_min = 1,
1317     .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1318     .brp_inc = 1,
1319 };
1320 
1321 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1322     .name = "pcan_usb_x6",
1323     .tseg1_min = 1,
1324     .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1325     .tseg2_min = 1,
1326     .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1327     .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1328     .brp_min = 1,
1329     .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1330     .brp_inc = 1,
1331 };
1332 
1333 const struct peak_usb_adapter pcan_usb_x6 = {
1334     .name = "PCAN-USB X6",
1335     .device_id = PCAN_USBX6_PRODUCT_ID,
1336     .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1337     .ctrlmode_supported = CAN_CTRLMODE_FD |
1338             CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1339             CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1340     .clock = {
1341         .freq = PCAN_UFD_CRYSTAL_HZ,
1342     },
1343     .bittiming_const = &pcan_usb_x6_const,
1344     .data_bittiming_const = &pcan_usb_x6_data_const,
1345 
1346     /* size of device private data */
1347     .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1348 
1349     .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1350 
1351     /* timestamps usage */
1352     .ts_used_bits = 32,
1353     .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1354     .us_per_ts_shift = 0,
1355 
1356     /* give here messages in/out endpoints */
1357     .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1358     .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1359 
1360     /* size of rx/tx usb buffers */
1361     .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1362     .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1363 
1364     /* device callbacks */
1365     .intf_probe = pcan_usb_pro_probe,   /* same as PCAN-USB Pro */
1366     .dev_init = pcan_usb_fd_init,
1367 
1368     .dev_exit = pcan_usb_fd_exit,
1369     .dev_free = pcan_usb_fd_free,
1370     .dev_set_bus = pcan_usb_fd_set_bus,
1371     .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1372     .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1373     .dev_decode_buf = pcan_usb_fd_decode_buf,
1374     .dev_start = pcan_usb_fd_start,
1375     .dev_stop = pcan_usb_fd_stop,
1376     .dev_restart_async = pcan_usb_fd_restart_async,
1377     .dev_encode_msg = pcan_usb_fd_encode_msg,
1378 
1379     .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1380 };
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