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linux/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
Vincent Mailhol 8e674ca742 can: do not increase rx_bytes statistics for RTR frames 
The actual payload length of the CAN Remote Transmission Request (RTR)
frames is always 0, i.e. no payload is transmitted on the wire.
However, those RTR frames still use the DLC to indicate the length of
the requested frame.

As such, net_device_stats::rx_bytes should not be increased for the
RTR frames.

This patch fixes all the CAN drivers.

Link: https://lore.kernel.org/all/20211207121531.42941-5-mailhol.vincent@wanadoo.fr
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Yasushi SHOJI <yashi@spacecubics.com>
Cc: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Cc: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Tested-by: Jimmy Assarsson <extja@kvaser.com> # kvaser
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Tested-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2022-01-05 12:09:05 +01:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
*
* Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
*/
#include <linux/netdevice.h>
#include <linux/usb.h>
#include <linux/module.h>
#include <linux/ethtool.h>
#include <linux/can.h>
#include <linux/can/dev.h>
#include <linux/can/error.h>
#include <linux/can/dev/peak_canfd.h>
#include "pcan_usb_core.h"
#include "pcan_usb_pro.h"
#define PCAN_USBPROFD_CHANNEL_COUNT 2
#define PCAN_USBFD_CHANNEL_COUNT 1
/* PCAN-USB Pro FD adapter internal clock (Hz) */
#define PCAN_UFD_CRYSTAL_HZ 80000000
#define PCAN_UFD_CMD_BUFFER_SIZE 512
#define PCAN_UFD_LOSPD_PKT_SIZE 64
/* PCAN-USB Pro FD command timeout (ms.) */
#define PCAN_UFD_CMD_TIMEOUT_MS 1000
/* PCAN-USB Pro FD rx/tx buffers size */
#define PCAN_UFD_RX_BUFFER_SIZE 2048
#define PCAN_UFD_TX_BUFFER_SIZE 512
/* read some versions info from the hw device */
struct __packed pcan_ufd_fw_info {
__le16 size_of; /* sizeof this */
__le16 type; /* type of this structure */
u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */
u8 bl_version[3]; /* Bootloader version */
u8 hw_version; /* Hardware version (PCB) */
u8 fw_version[3]; /* Firmware version */
__le32 dev_id[2]; /* "device id" per CAN */
__le32 ser_no; /* S/N */
__le32 flags; /* special functions */
};
/* handle device specific info used by the netdevices */
struct pcan_usb_fd_if {
struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL];
struct pcan_ufd_fw_info fw_info;
struct peak_time_ref time_ref;
int cm_ignore_count;
int dev_opened_count;
};
/* device information */
struct pcan_usb_fd_device {
struct peak_usb_device dev;
struct can_berr_counter bec;
struct pcan_usb_fd_if *usb_if;
u8 *cmd_buffer_addr;
};
/* Extended USB commands (non uCAN commands) */
/* Clock Modes command */
#define PCAN_UFD_CMD_CLK_SET 0x80
#define PCAN_UFD_CLK_80MHZ 0x0
#define PCAN_UFD_CLK_60MHZ 0x1
#define PCAN_UFD_CLK_40MHZ 0x2
#define PCAN_UFD_CLK_30MHZ 0x3
#define PCAN_UFD_CLK_24MHZ 0x4
#define PCAN_UFD_CLK_20MHZ 0x5
#define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ
struct __packed pcan_ufd_clock {
__le16 opcode_channel;
u8 mode;
u8 unused[5];
};
/* LED control command */
#define PCAN_UFD_CMD_LED_SET 0x86
#define PCAN_UFD_LED_DEV 0x00
#define PCAN_UFD_LED_FAST 0x01
#define PCAN_UFD_LED_SLOW 0x02
#define PCAN_UFD_LED_ON 0x03
#define PCAN_UFD_LED_OFF 0x04
#define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV
struct __packed pcan_ufd_led {
__le16 opcode_channel;
u8 mode;
u8 unused[5];
};
/* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
#define PCAN_UFD_FLTEXT_CALIBRATION 0x8000
struct __packed pcan_ufd_options {
__le16 opcode_channel;
__le16 ucan_mask;
u16 unused;
__le16 usb_mask;
};
/* Extended usage of uCAN messages for PCAN-USB Pro FD */
#define PCAN_UFD_MSG_CALIBRATION 0x100
struct __packed pcan_ufd_ts_msg {
__le16 size;
__le16 type;
__le32 ts_low;
__le32 ts_high;
__le16 usb_frame_index;
u16 unused;
};
#define PCAN_UFD_MSG_OVERRUN 0x101
#define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf)
struct __packed pcan_ufd_ovr_msg {
__le16 size;
__le16 type;
__le32 ts_low;
__le32 ts_high;
u8 channel;
u8 unused[3];
};
static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
{
return om->channel & 0xf;
}
/* Clock mode frequency values */
static const u32 pcan_usb_fd_clk_freq[6] = {
[PCAN_UFD_CLK_80MHZ] = 80000000,
[PCAN_UFD_CLK_60MHZ] = 60000000,
[PCAN_UFD_CLK_40MHZ] = 40000000,
[PCAN_UFD_CLK_30MHZ] = 30000000,
[PCAN_UFD_CLK_24MHZ] = 24000000,
[PCAN_UFD_CLK_20MHZ] = 20000000
};
/* return a device USB interface */
static inline
struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
return pdev->usb_if;
}
/* return a device USB commands buffer */
static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
return pdev->cmd_buffer_addr;
}
/* send PCAN-USB Pro FD commands synchronously */
static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
{
void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
int err = 0;
u8 *packet_ptr;
int packet_len;
ptrdiff_t cmd_len;
/* usb device unregistered? */
if (!(dev->state & PCAN_USB_STATE_CONNECTED))
return 0;
/* if a packet is not filled completely by commands, the command list
* is terminated with an "end of collection" record.
*/
cmd_len = cmd_tail - cmd_head;
if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
memset(cmd_tail, 0xff, sizeof(u64));
cmd_len += sizeof(u64);
}
packet_ptr = cmd_head;
packet_len = cmd_len;
/* firmware is not able to re-assemble 512 bytes buffer in full-speed */
if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
do {
err = usb_bulk_msg(dev->udev,
usb_sndbulkpipe(dev->udev,
PCAN_USBPRO_EP_CMDOUT),
packet_ptr, packet_len,
NULL, PCAN_UFD_CMD_TIMEOUT_MS);
if (err) {
netdev_err(dev->netdev,
"sending command failure: %d\n", err);
break;
}
packet_ptr += packet_len;
cmd_len -= packet_len;
if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
packet_len = cmd_len;
} while (packet_len > 0);
return err;
}
/* build the commands list in the given buffer, to enter operational mode */
static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
{
struct pucan_wr_err_cnt *prc;
struct pucan_command *cmd;
u8 *pc = buf;
/* 1st, reset error counters: */
prc = (struct pucan_wr_err_cnt *)pc;
prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_WR_ERR_CNT);
/* select both counters */
prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
/* and reset their values */
prc->tx_counter = 0;
prc->rx_counter = 0;
/* moves the pointer forward */
pc += sizeof(struct pucan_wr_err_cnt);
/* add command to switch from ISO to non-ISO mode, if fw allows it */
if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
struct pucan_options *puo = (struct pucan_options *)pc;
puo->opcode_channel =
(dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_CLR_DIS_OPTION) :
pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_SET_EN_OPTION);
puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
/* to be sure that no other extended bits will be taken into
* account
*/
puo->unused = 0;
/* moves the pointer forward */
pc += sizeof(struct pucan_options);
}
/* next, go back to operational mode */
cmd = (struct pucan_command *)pc;
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
(dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
PUCAN_CMD_LISTEN_ONLY_MODE :
PUCAN_CMD_NORMAL_MODE);
pc += sizeof(struct pucan_command);
return pc - buf;
}
/* set CAN bus on/off */
static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
{
u8 *pc = pcan_usb_fd_cmd_buffer(dev);
int l;
if (onoff) {
/* build the cmds list to enter operational mode */
l = pcan_usb_fd_build_restart_cmd(dev, pc);
} else {
struct pucan_command *cmd = (struct pucan_command *)pc;
/* build cmd to go back to reset mode */
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_RESET_MODE);
l = sizeof(struct pucan_command);
}
/* send the command */
return pcan_usb_fd_send_cmd(dev, pc + l);
}
/* set filtering masks:
*
* idx in range [0..63] selects a row #idx, all rows otherwise
* mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
*
* Each bit of this 64 x 32 bits array defines a CANID value:
*
* bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
* bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
*/
static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
u32 mask)
{
struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
int i, n;
/* select all rows when idx is out of range [0..63] */
if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
idx = 0;
/* select the row (and only the row) otherwise */
} else {
n = idx + 1;
}
for (i = idx; i < n; i++, cmd++) {
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_FILTER_STD);
cmd->idx = cpu_to_le16(i);
cmd->mask = cpu_to_le32(mask);
}
/* send the command */
return pcan_usb_fd_send_cmd(dev, cmd);
}
/* set/unset options
*
* onoff set(1)/unset(0) options
* mask each bit defines a kind of options to set/unset
*/
static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
bool onoff, u16 ucan_mask, u16 usb_mask)
{
struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
(onoff) ? PUCAN_CMD_SET_EN_OPTION :
PUCAN_CMD_CLR_DIS_OPTION);
cmd->ucan_mask = cpu_to_le16(ucan_mask);
cmd->usb_mask = cpu_to_le16(usb_mask);
/* send the command */
return pcan_usb_fd_send_cmd(dev, ++cmd);
}
/* setup LED control */
static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
{
struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PCAN_UFD_CMD_LED_SET);
cmd->mode = led_mode;
/* send the command */
return pcan_usb_fd_send_cmd(dev, ++cmd);
}
/* set CAN clock domain */
static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
u8 clk_mode)
{
struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PCAN_UFD_CMD_CLK_SET);
cmd->mode = clk_mode;
/* send the command */
return pcan_usb_fd_send_cmd(dev, ++cmd);
}
/* set bittiming for CAN and CAN-FD header */
static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
struct can_bittiming *bt)
{
struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_TIMING_SLOW);
cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
cmd->ewl = 96; /* default */
/* send the command */
return pcan_usb_fd_send_cmd(dev, ++cmd);
}
/* set CAN-FD bittiming for data */
static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
struct can_bittiming *bt)
{
struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
PUCAN_CMD_TIMING_FAST);
cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
/* send the command */
return pcan_usb_fd_send_cmd(dev, ++cmd);
}
/* handle restart but in asynchronously way
* (uses PCAN-USB Pro code to complete asynchronous request)
*/
static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
struct urb *urb, u8 *buf)
{
u8 *pc = buf;
/* build the entire cmds list in the provided buffer, to go back into
* operational mode.
*/
pc += pcan_usb_fd_build_restart_cmd(dev, pc);
/* add EOC */
memset(pc, 0xff, sizeof(struct pucan_command));
pc += sizeof(struct pucan_command);
/* complete the URB */
usb_fill_bulk_urb(urb, dev->udev,
usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
buf, pc - buf,
pcan_usb_pro_restart_complete, dev);
/* and submit it. */
return usb_submit_urb(urb, GFP_ATOMIC);
}
static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
pdev->cmd_buffer_addr[0] = 0;
pdev->cmd_buffer_addr[1] = !!loaded;
return pcan_usb_pro_send_req(dev,
PCAN_USBPRO_REQ_FCT,
PCAN_USBPRO_FCT_DRVLD,
pdev->cmd_buffer_addr,
PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
}
static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
struct pucan_msg *rx_msg)
{
struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
struct peak_usb_device *dev;
struct net_device *netdev;
struct canfd_frame *cfd;
struct sk_buff *skb;
const u16 rx_msg_flags = le16_to_cpu(rm->flags);
if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
return -ENOMEM;
dev = usb_if->dev[pucan_msg_get_channel(rm)];
netdev = dev->netdev;
if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
/* CANFD frame case */
skb = alloc_canfd_skb(netdev, &cfd);
if (!skb)
return -ENOMEM;
if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
cfd->flags |= CANFD_BRS;
if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
cfd->flags |= CANFD_ESI;
cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
} else {
/* CAN 2.0 frame case */
skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
if (!skb)
return -ENOMEM;
can_frame_set_cc_len((struct can_frame *)cfd,
pucan_msg_get_dlc(rm),
dev->can.ctrlmode);
}
cfd->can_id = le32_to_cpu(rm->can_id);
if (rx_msg_flags & PUCAN_MSG_EXT_ID)
cfd->can_id |= CAN_EFF_FLAG;
if (rx_msg_flags & PUCAN_MSG_RTR) {
cfd->can_id |= CAN_RTR_FLAG;
} else {
memcpy(cfd->data, rm->d, cfd->len);
netdev->stats.rx_bytes += cfd->len;
}
netdev->stats.rx_packets++;
peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low),
le32_to_cpu(rm->ts_high));
return 0;
}
/* handle uCAN status message */
static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
struct pucan_msg *rx_msg)
{
struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
struct pcan_usb_fd_device *pdev;
enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
enum can_state rx_state, tx_state;
struct peak_usb_device *dev;
struct net_device *netdev;
struct can_frame *cf;
struct sk_buff *skb;
if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
return -ENOMEM;
dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
pdev = container_of(dev, struct pcan_usb_fd_device, dev);
netdev = dev->netdev;
/* nothing should be sent while in BUS_OFF state */
if (dev->can.state == CAN_STATE_BUS_OFF)
return 0;
if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
new_state = CAN_STATE_BUS_OFF;
} else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
new_state = CAN_STATE_ERROR_PASSIVE;
} else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
new_state = CAN_STATE_ERROR_WARNING;
} else {
/* back to (or still in) ERROR_ACTIVE state */
new_state = CAN_STATE_ERROR_ACTIVE;
pdev->bec.txerr = 0;
pdev->bec.rxerr = 0;
}
/* state hasn't changed */
if (new_state == dev->can.state)
return 0;
/* handle bus state change */
tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
/* allocate an skb to store the error frame */
skb = alloc_can_err_skb(netdev, &cf);
can_change_state(netdev, cf, tx_state, rx_state);
/* things must be done even in case of OOM */
if (new_state == CAN_STATE_BUS_OFF)
can_bus_off(netdev);
if (!skb)
return -ENOMEM;
peak_usb_netif_rx_64(skb, le32_to_cpu(sm->ts_low),
le32_to_cpu(sm->ts_high));
return 0;
}
/* handle uCAN error message */
static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
struct pucan_msg *rx_msg)
{
struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
struct pcan_usb_fd_device *pdev;
struct peak_usb_device *dev;
if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
return -EINVAL;
dev = usb_if->dev[pucan_ermsg_get_channel(er)];
pdev = container_of(dev, struct pcan_usb_fd_device, dev);
/* keep a trace of tx and rx error counters for later use */
pdev->bec.txerr = er->tx_err_cnt;
pdev->bec.rxerr = er->rx_err_cnt;
return 0;
}
/* handle uCAN overrun message */
static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
struct pucan_msg *rx_msg)
{
struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
struct peak_usb_device *dev;
struct net_device *netdev;
struct can_frame *cf;
struct sk_buff *skb;
if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
return -EINVAL;
dev = usb_if->dev[pufd_omsg_get_channel(ov)];
netdev = dev->netdev;
/* allocate an skb to store the error frame */
skb = alloc_can_err_skb(netdev, &cf);
if (!skb)
return -ENOMEM;
cf->can_id |= CAN_ERR_CRTL;
cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
peak_usb_netif_rx_64(skb, le32_to_cpu(ov->ts_low),
le32_to_cpu(ov->ts_high));
netdev->stats.rx_over_errors++;
netdev->stats.rx_errors++;
return 0;
}
/* handle USB calibration message */
static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
struct pucan_msg *rx_msg)
{
struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
/* should wait until clock is stabilized */
if (usb_if->cm_ignore_count > 0)
usb_if->cm_ignore_count--;
else
peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
}
/* callback for bulk IN urb */
static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
{
struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
struct net_device *netdev = dev->netdev;
struct pucan_msg *rx_msg;
u8 *msg_ptr, *msg_end;
int err = 0;
/* loop reading all the records from the incoming message */
msg_ptr = urb->transfer_buffer;
msg_end = urb->transfer_buffer + urb->actual_length;
for (; msg_ptr < msg_end;) {
u16 rx_msg_type, rx_msg_size;
rx_msg = (struct pucan_msg *)msg_ptr;
if (!rx_msg->size) {
/* null packet found: end of list */
break;
}
rx_msg_size = le16_to_cpu(rx_msg->size);
rx_msg_type = le16_to_cpu(rx_msg->type);
/* check if the record goes out of current packet */
if (msg_ptr + rx_msg_size > msg_end) {
netdev_err(netdev,
"got frag rec: should inc usb rx buf sze\n");
err = -EBADMSG;
break;
}
switch (rx_msg_type) {
case PUCAN_MSG_CAN_RX:
err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
if (err < 0)
goto fail;
break;
case PCAN_UFD_MSG_CALIBRATION:
pcan_usb_fd_decode_ts(usb_if, rx_msg);
break;
case PUCAN_MSG_ERROR:
err = pcan_usb_fd_decode_error(usb_if, rx_msg);
if (err < 0)
goto fail;
break;
case PUCAN_MSG_STATUS:
err = pcan_usb_fd_decode_status(usb_if, rx_msg);
if (err < 0)
goto fail;
break;
case PCAN_UFD_MSG_OVERRUN:
err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
if (err < 0)
goto fail;
break;
default:
netdev_err(netdev,
"unhandled msg type 0x%02x (%d): ignored\n",
rx_msg_type, rx_msg_type);
break;
}
msg_ptr += rx_msg_size;
}
fail:
if (err)
pcan_dump_mem("received msg",
urb->transfer_buffer, urb->actual_length);
return err;
}
/* CAN/CANFD frames encoding callback */
static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
struct sk_buff *skb, u8 *obuf, size_t *size)
{
struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
u16 tx_msg_size, tx_msg_flags;
u8 dlc;
if (cfd->len > CANFD_MAX_DLEN)
return -EINVAL;
tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
tx_msg->size = cpu_to_le16(tx_msg_size);
tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
tx_msg_flags = 0;
if (cfd->can_id & CAN_EFF_FLAG) {
tx_msg_flags |= PUCAN_MSG_EXT_ID;
tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
} else {
tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
}
if (can_is_canfd_skb(skb)) {
/* considering a CANFD frame */
dlc = can_fd_len2dlc(cfd->len);
tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
if (cfd->flags & CANFD_BRS)
tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
if (cfd->flags & CANFD_ESI)
tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
} else {
/* CAND 2.0 frames */
dlc = can_get_cc_dlc((struct can_frame *)cfd,
dev->can.ctrlmode);
if (cfd->can_id & CAN_RTR_FLAG)
tx_msg_flags |= PUCAN_MSG_RTR;
}
/* Single-Shot frame */
if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
tx_msg_flags |= PUCAN_MSG_SINGLE_SHOT;
tx_msg->flags = cpu_to_le16(tx_msg_flags);
tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc);
memcpy(tx_msg->d, cfd->data, cfd->len);
/* add null size message to tag the end (messages are 32-bits aligned)
*/
tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
tx_msg->size = 0;
/* set the whole size of the USB packet to send */
*size = tx_msg_size + sizeof(u32);
return 0;
}
/* start the interface (last chance before set bus on) */
static int pcan_usb_fd_start(struct peak_usb_device *dev)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
int err;
/* set filter mode: all acceptance */
err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
if (err)
return err;
/* opening first device: */
if (pdev->usb_if->dev_opened_count == 0) {
/* reset time_ref */
peak_usb_init_time_ref(&pdev->usb_if->time_ref,
&pcan_usb_pro_fd);
/* enable USB calibration messages */
err = pcan_usb_fd_set_options(dev, 1,
PUCAN_OPTION_ERROR,
PCAN_UFD_FLTEXT_CALIBRATION);
}
pdev->usb_if->dev_opened_count++;
/* reset cached error counters */
pdev->bec.txerr = 0;
pdev->bec.rxerr = 0;
return err;
}
/* socket callback used to copy berr counters values received through USB */
static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
struct can_berr_counter *bec)
{
struct peak_usb_device *dev = netdev_priv(netdev);
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
*bec = pdev->bec;
/* must return 0 */
return 0;
}
/* stop interface (last chance before set bus off) */
static int pcan_usb_fd_stop(struct peak_usb_device *dev)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
/* turn off special msgs for that interface if no other dev opened */
if (pdev->usb_if->dev_opened_count == 1)
pcan_usb_fd_set_options(dev, 0,
PUCAN_OPTION_ERROR,
PCAN_UFD_FLTEXT_CALIBRATION);
pdev->usb_if->dev_opened_count--;
return 0;
}
/* called when probing, to initialize a device object */
static int pcan_usb_fd_init(struct peak_usb_device *dev)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
int i, err = -ENOMEM;
/* do this for 1st channel only */
if (!dev->prev_siblings) {
/* allocate netdevices common structure attached to first one */
pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
if (!pdev->usb_if)
goto err_out;
/* allocate command buffer once for all for the interface */
pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
GFP_KERNEL);
if (!pdev->cmd_buffer_addr)
goto err_out_1;
/* number of ts msgs to ignore before taking one into account */
pdev->usb_if->cm_ignore_count = 5;
err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
PCAN_USBPRO_INFO_FW,
&pdev->usb_if->fw_info,
sizeof(pdev->usb_if->fw_info));
if (err) {
dev_err(dev->netdev->dev.parent,
"unable to read %s firmware info (err %d)\n",
dev->adapter->name, err);
goto err_out_2;
}
/* explicit use of dev_xxx() instead of netdev_xxx() here:
* information displayed are related to the device itself, not
* to the canx (channel) device.
*/
dev_info(dev->netdev->dev.parent,
"PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
dev->adapter->name, pdev->usb_if->fw_info.hw_version,
pdev->usb_if->fw_info.fw_version[0],
pdev->usb_if->fw_info.fw_version[1],
pdev->usb_if->fw_info.fw_version[2],
dev->adapter->ctrl_count);
/* check for ability to switch between ISO/non-ISO modes */
if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
/* firmware >= 2.x supports ISO/non-ISO switching */
dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
} else {
/* firmware < 2.x only supports fixed(!) non-ISO */
dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
}
/* tell the hardware the can driver is running */
err = pcan_usb_fd_drv_loaded(dev, 1);
if (err) {
dev_err(dev->netdev->dev.parent,
"unable to tell %s driver is loaded (err %d)\n",
dev->adapter->name, err);
goto err_out_2;
}
} else {
/* otherwise, simply copy previous sibling's values */
struct pcan_usb_fd_device *ppdev =
container_of(dev->prev_siblings,
struct pcan_usb_fd_device, dev);
pdev->usb_if = ppdev->usb_if;
pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
/* do a copy of the ctrlmode[_supported] too */
dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
}
pdev->usb_if->dev[dev->ctrl_idx] = dev;
dev->device_number =
le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
/* set clock domain */
for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
break;
if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
dev_warn(dev->netdev->dev.parent,
"incompatible clock frequencies\n");
err = -EINVAL;
goto err_out_2;
}
pcan_usb_fd_set_clock_domain(dev, i);
/* set LED in default state (end of init phase) */
pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
return 0;
err_out_2:
kfree(pdev->cmd_buffer_addr);
err_out_1:
kfree(pdev->usb_if);
err_out:
return err;
}
/* called when driver module is being unloaded */
static void pcan_usb_fd_exit(struct peak_usb_device *dev)
{
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
/* when rmmod called before unplug and if down, should reset things
* before leaving
*/
if (dev->can.state != CAN_STATE_STOPPED) {
/* set bus off on the corresponding channel */
pcan_usb_fd_set_bus(dev, 0);
}
/* switch off corresponding CAN LEDs */
pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
/* if channel #0 (only) */
if (dev->ctrl_idx == 0) {
/* turn off calibration message if any device were opened */
if (pdev->usb_if->dev_opened_count > 0)
pcan_usb_fd_set_options(dev, 0,
PUCAN_OPTION_ERROR,
PCAN_UFD_FLTEXT_CALIBRATION);
/* tell USB adapter that the driver is being unloaded */
pcan_usb_fd_drv_loaded(dev, 0);
}
}
/* called when the USB adapter is unplugged */
static void pcan_usb_fd_free(struct peak_usb_device *dev)
{
/* last device: can free shared objects now */
if (!dev->prev_siblings && !dev->next_siblings) {
struct pcan_usb_fd_device *pdev =
container_of(dev, struct pcan_usb_fd_device, dev);
/* free commands buffer */
kfree(pdev->cmd_buffer_addr);
/* free usb interface object */
kfree(pdev->usb_if);
}
}
/* blink LED's */
static int pcan_usb_fd_set_phys_id(struct net_device *netdev,
enum ethtool_phys_id_state state)
{
struct peak_usb_device *dev = netdev_priv(netdev);
int err = 0;
switch (state) {
case ETHTOOL_ID_ACTIVE:
err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_FAST);
break;
case ETHTOOL_ID_INACTIVE:
err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
break;
default:
break;
}
return err;
}
static const struct ethtool_ops pcan_usb_fd_ethtool_ops = {
.set_phys_id = pcan_usb_fd_set_phys_id,
};
/* describes the PCAN-USB FD adapter */
static const struct can_bittiming_const pcan_usb_fd_const = {
.name = "pcan_usb_fd",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
.brp_inc = 1,
};
static const struct can_bittiming_const pcan_usb_fd_data_const = {
.name = "pcan_usb_fd",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TFAST_BRP_BITS),
.brp_inc = 1,
};
const struct peak_usb_adapter pcan_usb_fd = {
.name = "PCAN-USB FD",
.device_id = PCAN_USBFD_PRODUCT_ID,
.ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
.ctrlmode_supported = CAN_CTRLMODE_FD |
CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
.clock = {
.freq = PCAN_UFD_CRYSTAL_HZ,
},
.bittiming_const = &pcan_usb_fd_const,
.data_bittiming_const = &pcan_usb_fd_data_const,
/* size of device private data */
.sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
.ethtool_ops = &pcan_usb_fd_ethtool_ops,
/* timestamps usage */
.ts_used_bits = 32,
.us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
.us_per_ts_shift = 0,
/* give here messages in/out endpoints */
.ep_msg_in = PCAN_USBPRO_EP_MSGIN,
.ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
/* size of rx/tx usb buffers */
.rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
.tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
/* device callbacks */
.intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
.dev_init = pcan_usb_fd_init,
.dev_exit = pcan_usb_fd_exit,
.dev_free = pcan_usb_fd_free,
.dev_set_bus = pcan_usb_fd_set_bus,
.dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
.dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
.dev_decode_buf = pcan_usb_fd_decode_buf,
.dev_start = pcan_usb_fd_start,
.dev_stop = pcan_usb_fd_stop,
.dev_restart_async = pcan_usb_fd_restart_async,
.dev_encode_msg = pcan_usb_fd_encode_msg,
.do_get_berr_counter = pcan_usb_fd_get_berr_counter,
};
/* describes the PCAN-CHIP USB */
static const struct can_bittiming_const pcan_usb_chip_const = {
.name = "pcan_chip_usb",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
.brp_inc = 1,
};
static const struct can_bittiming_const pcan_usb_chip_data_const = {
.name = "pcan_chip_usb",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TFAST_BRP_BITS),
.brp_inc = 1,
};
const struct peak_usb_adapter pcan_usb_chip = {
.name = "PCAN-Chip USB",
.device_id = PCAN_USBCHIP_PRODUCT_ID,
.ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
.ctrlmode_supported = CAN_CTRLMODE_FD |
CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
.clock = {
.freq = PCAN_UFD_CRYSTAL_HZ,
},
.bittiming_const = &pcan_usb_chip_const,
.data_bittiming_const = &pcan_usb_chip_data_const,
/* size of device private data */
.sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
.ethtool_ops = &pcan_usb_fd_ethtool_ops,
/* timestamps usage */
.ts_used_bits = 32,
.us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
.us_per_ts_shift = 0,
/* give here messages in/out endpoints */
.ep_msg_in = PCAN_USBPRO_EP_MSGIN,
.ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
/* size of rx/tx usb buffers */
.rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
.tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
/* device callbacks */
.intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
.dev_init = pcan_usb_fd_init,
.dev_exit = pcan_usb_fd_exit,
.dev_free = pcan_usb_fd_free,
.dev_set_bus = pcan_usb_fd_set_bus,
.dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
.dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
.dev_decode_buf = pcan_usb_fd_decode_buf,
.dev_start = pcan_usb_fd_start,
.dev_stop = pcan_usb_fd_stop,
.dev_restart_async = pcan_usb_fd_restart_async,
.dev_encode_msg = pcan_usb_fd_encode_msg,
.do_get_berr_counter = pcan_usb_fd_get_berr_counter,
};
/* describes the PCAN-USB Pro FD adapter */
static const struct can_bittiming_const pcan_usb_pro_fd_const = {
.name = "pcan_usb_pro_fd",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
.brp_inc = 1,
};
static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
.name = "pcan_usb_pro_fd",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TFAST_BRP_BITS),
.brp_inc = 1,
};
const struct peak_usb_adapter pcan_usb_pro_fd = {
.name = "PCAN-USB Pro FD",
.device_id = PCAN_USBPROFD_PRODUCT_ID,
.ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
.ctrlmode_supported = CAN_CTRLMODE_FD |
CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
.clock = {
.freq = PCAN_UFD_CRYSTAL_HZ,
},
.bittiming_const = &pcan_usb_pro_fd_const,
.data_bittiming_const = &pcan_usb_pro_fd_data_const,
/* size of device private data */
.sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
.ethtool_ops = &pcan_usb_fd_ethtool_ops,
/* timestamps usage */
.ts_used_bits = 32,
.us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
.us_per_ts_shift = 0,
/* give here messages in/out endpoints */
.ep_msg_in = PCAN_USBPRO_EP_MSGIN,
.ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
/* size of rx/tx usb buffers */
.rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
.tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
/* device callbacks */
.intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
.dev_init = pcan_usb_fd_init,
.dev_exit = pcan_usb_fd_exit,
.dev_free = pcan_usb_fd_free,
.dev_set_bus = pcan_usb_fd_set_bus,
.dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
.dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
.dev_decode_buf = pcan_usb_fd_decode_buf,
.dev_start = pcan_usb_fd_start,
.dev_stop = pcan_usb_fd_stop,
.dev_restart_async = pcan_usb_fd_restart_async,
.dev_encode_msg = pcan_usb_fd_encode_msg,
.do_get_berr_counter = pcan_usb_fd_get_berr_counter,
};
/* describes the PCAN-USB X6 adapter */
static const struct can_bittiming_const pcan_usb_x6_const = {
.name = "pcan_usb_x6",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
.brp_inc = 1,
};
static const struct can_bittiming_const pcan_usb_x6_data_const = {
.name = "pcan_usb_x6",
.tseg1_min = 1,
.tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
.tseg2_min = 1,
.tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
.sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
.brp_min = 1,
.brp_max = (1 << PUCAN_TFAST_BRP_BITS),
.brp_inc = 1,
};
const struct peak_usb_adapter pcan_usb_x6 = {
.name = "PCAN-USB X6",
.device_id = PCAN_USBX6_PRODUCT_ID,
.ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
.ctrlmode_supported = CAN_CTRLMODE_FD |
CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
.clock = {
.freq = PCAN_UFD_CRYSTAL_HZ,
},
.bittiming_const = &pcan_usb_x6_const,
.data_bittiming_const = &pcan_usb_x6_data_const,
/* size of device private data */
.sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
.ethtool_ops = &pcan_usb_fd_ethtool_ops,
/* timestamps usage */
.ts_used_bits = 32,
.us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
.us_per_ts_shift = 0,
/* give here messages in/out endpoints */
.ep_msg_in = PCAN_USBPRO_EP_MSGIN,
.ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
/* size of rx/tx usb buffers */
.rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
.tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
/* device callbacks */
.intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
.dev_init = pcan_usb_fd_init,
.dev_exit = pcan_usb_fd_exit,
.dev_free = pcan_usb_fd_free,
.dev_set_bus = pcan_usb_fd_set_bus,
.dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
.dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
.dev_decode_buf = pcan_usb_fd_decode_buf,
.dev_start = pcan_usb_fd_start,
.dev_stop = pcan_usb_fd_stop,
.dev_restart_async = pcan_usb_fd_restart_async,
.dev_encode_msg = pcan_usb_fd_encode_msg,
.do_get_berr_counter = pcan_usb_fd_get_berr_counter,
};
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