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linux-zen-server/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0
/* Parts of this driver are based on the following:
* - Kvaser linux leaf driver (version 4.78)
* - CAN driver for esd CAN-USB/2
* - Kvaser linux usbcanII driver (version 5.3)
*
* Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
* Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
* Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
* Copyright (C) 2015 Valeo S.A.
*/
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/gfp.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/units.h>
#include <linux/usb.h>
#include <linux/workqueue.h>
#include <linux/can.h>
#include <linux/can/dev.h>
#include <linux/can/error.h>
#include <linux/can/netlink.h>
#include "kvaser_usb.h"
#define MAX_USBCAN_NET_DEVICES 2
/* Command header size */
#define CMD_HEADER_LEN 2
/* Kvaser CAN message flags */
#define MSG_FLAG_ERROR_FRAME BIT(0)
#define MSG_FLAG_OVERRUN BIT(1)
#define MSG_FLAG_NERR BIT(2)
#define MSG_FLAG_WAKEUP BIT(3)
#define MSG_FLAG_REMOTE_FRAME BIT(4)
#define MSG_FLAG_RESERVED BIT(5)
#define MSG_FLAG_TX_ACK BIT(6)
#define MSG_FLAG_TX_REQUEST BIT(7)
/* CAN states (M16C CxSTRH register) */
#define M16C_STATE_BUS_RESET BIT(0)
#define M16C_STATE_BUS_ERROR BIT(4)
#define M16C_STATE_BUS_PASSIVE BIT(5)
#define M16C_STATE_BUS_OFF BIT(6)
/* Leaf/usbcan command ids */
#define CMD_RX_STD_MESSAGE 12
#define CMD_TX_STD_MESSAGE 13
#define CMD_RX_EXT_MESSAGE 14
#define CMD_TX_EXT_MESSAGE 15
#define CMD_SET_BUS_PARAMS 16
#define CMD_GET_BUS_PARAMS 17
#define CMD_GET_BUS_PARAMS_REPLY 18
#define CMD_GET_CHIP_STATE 19
#define CMD_CHIP_STATE_EVENT 20
#define CMD_SET_CTRL_MODE 21
#define CMD_RESET_CHIP 24
#define CMD_START_CHIP 26
#define CMD_START_CHIP_REPLY 27
#define CMD_STOP_CHIP 28
#define CMD_STOP_CHIP_REPLY 29
#define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33
#define CMD_GET_CARD_INFO 34
#define CMD_GET_CARD_INFO_REPLY 35
#define CMD_GET_SOFTWARE_INFO 38
#define CMD_GET_SOFTWARE_INFO_REPLY 39
#define CMD_ERROR_EVENT 45
#define CMD_FLUSH_QUEUE 48
#define CMD_TX_ACKNOWLEDGE 50
#define CMD_CAN_ERROR_EVENT 51
#define CMD_FLUSH_QUEUE_REPLY 68
#define CMD_GET_CAPABILITIES_REQ 95
#define CMD_GET_CAPABILITIES_RESP 96
#define CMD_LEAF_LOG_MESSAGE 106
/* Leaf frequency options */
#define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60
#define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0
#define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)
#define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)
#define KVASER_USB_LEAF_SWOPTION_EXT_CAP BIT(12)
/* error factors */
#define M16C_EF_ACKE BIT(0)
#define M16C_EF_CRCE BIT(1)
#define M16C_EF_FORME BIT(2)
#define M16C_EF_STFE BIT(3)
#define M16C_EF_BITE0 BIT(4)
#define M16C_EF_BITE1 BIT(5)
#define M16C_EF_RCVE BIT(6)
#define M16C_EF_TRE BIT(7)
/* Only Leaf-based devices can report M16C error factors,
* thus define our own error status flags for USBCANII
*/
#define USBCAN_ERROR_STATE_NONE 0
#define USBCAN_ERROR_STATE_TX_ERROR BIT(0)
#define USBCAN_ERROR_STATE_RX_ERROR BIT(1)
#define USBCAN_ERROR_STATE_BUSERROR BIT(2)
/* ctrl modes */
#define KVASER_CTRL_MODE_NORMAL 1
#define KVASER_CTRL_MODE_SILENT 2
#define KVASER_CTRL_MODE_SELFRECEPTION 3
#define KVASER_CTRL_MODE_OFF 4
/* Extended CAN identifier flag */
#define KVASER_EXTENDED_FRAME BIT(31)
struct kvaser_cmd_simple {
u8 tid;
u8 channel;
} __packed;
struct kvaser_cmd_cardinfo {
u8 tid;
u8 nchannels;
__le32 serial_number;
__le32 padding0;
__le32 clock_resolution;
__le32 mfgdate;
u8 ean[8];
u8 hw_revision;
union {
struct {
u8 usb_hs_mode;
} __packed leaf1;
struct {
u8 padding;
} __packed usbcan1;
} __packed;
__le16 padding1;
} __packed;
struct leaf_cmd_softinfo {
u8 tid;
u8 padding0;
__le32 sw_options;
__le32 fw_version;
__le16 max_outstanding_tx;
__le16 padding1[9];
} __packed;
struct usbcan_cmd_softinfo {
u8 tid;
u8 fw_name[5];
__le16 max_outstanding_tx;
u8 padding[6];
__le32 fw_version;
__le16 checksum;
__le16 sw_options;
} __packed;
struct kvaser_cmd_busparams {
u8 tid;
u8 channel;
struct kvaser_usb_busparams busparams;
} __packed;
struct kvaser_cmd_tx_can {
u8 channel;
u8 tid;
u8 data[14];
union {
struct {
u8 padding;
u8 flags;
} __packed leaf;
struct {
u8 flags;
u8 padding;
} __packed usbcan;
} __packed;
} __packed;
struct kvaser_cmd_rx_can_header {
u8 channel;
u8 flag;
} __packed;
struct leaf_cmd_rx_can {
u8 channel;
u8 flag;
__le16 time[3];
u8 data[14];
} __packed;
struct usbcan_cmd_rx_can {
u8 channel;
u8 flag;
u8 data[14];
__le16 time;
} __packed;
struct leaf_cmd_chip_state_event {
u8 tid;
u8 channel;
__le16 time[3];
u8 tx_errors_count;
u8 rx_errors_count;
u8 status;
u8 padding[3];
} __packed;
struct usbcan_cmd_chip_state_event {
u8 tid;
u8 channel;
u8 tx_errors_count;
u8 rx_errors_count;
__le16 time;
u8 status;
u8 padding[3];
} __packed;
struct kvaser_cmd_tx_acknowledge_header {
u8 channel;
u8 tid;
} __packed;
struct leaf_cmd_can_error_event {
u8 tid;
u8 flags;
__le16 time[3];
u8 channel;
u8 padding;
u8 tx_errors_count;
u8 rx_errors_count;
u8 status;
u8 error_factor;
} __packed;
struct usbcan_cmd_can_error_event {
u8 tid;
u8 padding;
u8 tx_errors_count_ch0;
u8 rx_errors_count_ch0;
u8 tx_errors_count_ch1;
u8 rx_errors_count_ch1;
u8 status_ch0;
u8 status_ch1;
__le16 time;
} __packed;
/* CMD_ERROR_EVENT error codes */
#define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL 0x8
#define KVASER_USB_LEAF_ERROR_EVENT_PARAM 0x9
struct leaf_cmd_error_event {
u8 tid;
u8 error_code;
__le16 timestamp[3];
__le16 padding;
__le16 info1;
__le16 info2;
} __packed;
struct usbcan_cmd_error_event {
u8 tid;
u8 error_code;
__le16 info1;
__le16 info2;
__le16 timestamp;
__le16 padding;
} __packed;
struct kvaser_cmd_ctrl_mode {
u8 tid;
u8 channel;
u8 ctrl_mode;
u8 padding[3];
} __packed;
struct kvaser_cmd_flush_queue {
u8 tid;
u8 channel;
u8 flags;
u8 padding[3];
} __packed;
struct leaf_cmd_log_message {
u8 channel;
u8 flags;
__le16 time[3];
u8 dlc;
u8 time_offset;
__le32 id;
u8 data[8];
} __packed;
/* Sub commands for cap_req and cap_res */
#define KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE 0x02
#define KVASER_USB_LEAF_CAP_CMD_ERR_REPORT 0x05
struct kvaser_cmd_cap_req {
__le16 padding0;
__le16 cap_cmd;
__le16 padding1;
__le16 channel;
} __packed;
/* Status codes for cap_res */
#define KVASER_USB_LEAF_CAP_STAT_OK 0x00
#define KVASER_USB_LEAF_CAP_STAT_NOT_IMPL 0x01
#define KVASER_USB_LEAF_CAP_STAT_UNAVAIL 0x02
struct kvaser_cmd_cap_res {
__le16 padding;
__le16 cap_cmd;
__le16 status;
__le32 mask;
__le32 value;
} __packed;
struct kvaser_cmd {
u8 len;
u8 id;
union {
struct kvaser_cmd_simple simple;
struct kvaser_cmd_cardinfo cardinfo;
struct kvaser_cmd_busparams busparams;
struct kvaser_cmd_rx_can_header rx_can_header;
struct kvaser_cmd_tx_acknowledge_header tx_acknowledge_header;
union {
struct leaf_cmd_softinfo softinfo;
struct leaf_cmd_rx_can rx_can;
struct leaf_cmd_chip_state_event chip_state_event;
struct leaf_cmd_can_error_event can_error_event;
struct leaf_cmd_log_message log_message;
struct leaf_cmd_error_event error_event;
struct kvaser_cmd_cap_req cap_req;
struct kvaser_cmd_cap_res cap_res;
} __packed leaf;
union {
struct usbcan_cmd_softinfo softinfo;
struct usbcan_cmd_rx_can rx_can;
struct usbcan_cmd_chip_state_event chip_state_event;
struct usbcan_cmd_can_error_event can_error_event;
struct usbcan_cmd_error_event error_event;
} __packed usbcan;
struct kvaser_cmd_tx_can tx_can;
struct kvaser_cmd_ctrl_mode ctrl_mode;
struct kvaser_cmd_flush_queue flush_queue;
} u;
} __packed;
#define CMD_SIZE_ANY 0xff
#define kvaser_fsize(field) sizeof_field(struct kvaser_cmd, field)
static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = {
[CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),
[CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),
[CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),
[CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.tx_acknowledge_header),
[CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.leaf.softinfo),
[CMD_RX_STD_MESSAGE] = kvaser_fsize(u.leaf.rx_can),
[CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.leaf.rx_can),
[CMD_LEAF_LOG_MESSAGE] = kvaser_fsize(u.leaf.log_message),
[CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.leaf.chip_state_event),
[CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.leaf.can_error_event),
[CMD_GET_CAPABILITIES_RESP] = kvaser_fsize(u.leaf.cap_res),
[CMD_GET_BUS_PARAMS_REPLY] = kvaser_fsize(u.busparams),
[CMD_ERROR_EVENT] = kvaser_fsize(u.leaf.error_event),
/* ignored events: */
[CMD_FLUSH_QUEUE_REPLY] = CMD_SIZE_ANY,
};
static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = {
[CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),
[CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),
[CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),
[CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.tx_acknowledge_header),
[CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.usbcan.softinfo),
[CMD_RX_STD_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),
[CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),
[CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.usbcan.chip_state_event),
[CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.usbcan.can_error_event),
[CMD_ERROR_EVENT] = kvaser_fsize(u.usbcan.error_event),
/* ignored events: */
[CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = CMD_SIZE_ANY,
};
/* Summary of a kvaser error event, for a unified Leaf/Usbcan error
* handling. Some discrepancies between the two families exist:
*
* - USBCAN firmware does not report M16C "error factors"
* - USBCAN controllers has difficulties reporting if the raised error
* event is for ch0 or ch1. They leave such arbitration to the OS
* driver by letting it compare error counters with previous values
* and decide the error event's channel. Thus for USBCAN, the channel
* field is only advisory.
*/
struct kvaser_usb_err_summary {
u8 channel, status, txerr, rxerr;
union {
struct {
u8 error_factor;
} leaf;
struct {
u8 other_ch_status;
u8 error_state;
} usbcan;
};
};
struct kvaser_usb_net_leaf_priv {
struct kvaser_usb_net_priv *net;
struct delayed_work chip_state_req_work;
/* started but not reported as bus-on yet */
bool joining_bus;
};
static const struct can_bittiming_const kvaser_usb_leaf_m16c_bittiming_const = {
.name = "kvaser_usb_ucii",
.tseg1_min = 4,
.tseg1_max = 16,
.tseg2_min = 2,
.tseg2_max = 8,
.sjw_max = 4,
.brp_min = 1,
.brp_max = 16,
.brp_inc = 1,
};
static const struct can_bittiming_const kvaser_usb_leaf_m32c_bittiming_const = {
.name = "kvaser_usb_leaf",
.tseg1_min = 3,
.tseg1_max = 16,
.tseg2_min = 2,
.tseg2_max = 8,
.sjw_max = 4,
.brp_min = 2,
.brp_max = 128,
.brp_inc = 2,
};
static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = {
.clock = {
.freq = 8 * MEGA /* Hz */,
},
.timestamp_freq = 1,
.bittiming_const = &kvaser_usb_leaf_m16c_bittiming_const,
};
static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg = {
.clock = {
.freq = 16 * MEGA /* Hz */,
},
.timestamp_freq = 1,
.bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
};
static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = {
.clock = {
.freq = 16 * MEGA /* Hz */,
},
.timestamp_freq = 1,
.bittiming_const = &kvaser_usb_flexc_bittiming_const,
};
static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = {
.clock = {
.freq = 24 * MEGA /* Hz */,
},
.timestamp_freq = 1,
.bittiming_const = &kvaser_usb_flexc_bittiming_const,
};
static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = {
.clock = {
.freq = 32 * MEGA /* Hz */,
},
.timestamp_freq = 1,
.bittiming_const = &kvaser_usb_flexc_bittiming_const,
};
static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
/* buffer size >= cmd->len ensured by caller */
u8 min_size = 0;
switch (dev->driver_info->family) {
case KVASER_LEAF:
if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_leaf))
min_size = kvaser_usb_leaf_cmd_sizes_leaf[cmd->id];
break;
case KVASER_USBCAN:
if (cmd->id < ARRAY_SIZE(kvaser_usb_leaf_cmd_sizes_usbcan))
min_size = kvaser_usb_leaf_cmd_sizes_usbcan[cmd->id];
break;
}
if (min_size == CMD_SIZE_ANY)
return 0;
if (min_size) {
min_size += CMD_HEADER_LEN;
if (cmd->len >= min_size)
return 0;
dev_err_ratelimited(&dev->intf->dev,
"Received command %u too short (size %u, needed %u)",
cmd->id, cmd->len, min_size);
return -EIO;
}
dev_warn_ratelimited(&dev->intf->dev,
"Unhandled command (%d, size %d)\n",
cmd->id, cmd->len);
return -EINVAL;
}
static void *
kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv,
const struct sk_buff *skb, int *cmd_len,
u16 transid)
{
struct kvaser_usb *dev = priv->dev;
struct kvaser_cmd *cmd;
u8 *cmd_tx_can_flags = NULL; /* GCC */
struct can_frame *cf = (struct can_frame *)skb->data;
cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
if (cmd) {
cmd->u.tx_can.tid = transid & 0xff;
cmd->len = *cmd_len = CMD_HEADER_LEN +
sizeof(struct kvaser_cmd_tx_can);
cmd->u.tx_can.channel = priv->channel;
switch (dev->driver_info->family) {
case KVASER_LEAF:
cmd_tx_can_flags = &cmd->u.tx_can.leaf.flags;
break;
case KVASER_USBCAN:
cmd_tx_can_flags = &cmd->u.tx_can.usbcan.flags;
break;
}
*cmd_tx_can_flags = 0;
if (cf->can_id & CAN_EFF_FLAG) {
cmd->id = CMD_TX_EXT_MESSAGE;
cmd->u.tx_can.data[0] = (cf->can_id >> 24) & 0x1f;
cmd->u.tx_can.data[1] = (cf->can_id >> 18) & 0x3f;
cmd->u.tx_can.data[2] = (cf->can_id >> 14) & 0x0f;
cmd->u.tx_can.data[3] = (cf->can_id >> 6) & 0xff;
cmd->u.tx_can.data[4] = cf->can_id & 0x3f;
} else {
cmd->id = CMD_TX_STD_MESSAGE;
cmd->u.tx_can.data[0] = (cf->can_id >> 6) & 0x1f;
cmd->u.tx_can.data[1] = cf->can_id & 0x3f;
}
cmd->u.tx_can.data[5] = cf->len;
memcpy(&cmd->u.tx_can.data[6], cf->data, cf->len);
if (cf->can_id & CAN_RTR_FLAG)
*cmd_tx_can_flags |= MSG_FLAG_REMOTE_FRAME;
}
return cmd;
}
static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id,
struct kvaser_cmd *cmd)
{
struct kvaser_cmd *tmp;
void *buf;
int actual_len;
int err;
int pos;
unsigned long to = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT);
buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
do {
err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE,
&actual_len);
if (err < 0)
goto end;
pos = 0;
while (pos <= actual_len - CMD_HEADER_LEN) {
tmp = buf + pos;
/* Handle commands crossing the USB endpoint max packet
* size boundary. Check kvaser_usb_read_bulk_callback()
* for further details.
*/
if (tmp->len == 0) {
pos = round_up(pos,
le16_to_cpu
(dev->bulk_in->wMaxPacketSize));
continue;
}
if (pos + tmp->len > actual_len) {
dev_err_ratelimited(&dev->intf->dev,
"Format error\n");
break;
}
if (tmp->id == id) {
memcpy(cmd, tmp, tmp->len);
goto end;
}
pos += tmp->len;
}
} while (time_before(jiffies, to));
err = -EINVAL;
end:
kfree(buf);
if (err == 0)
err = kvaser_usb_leaf_verify_size(dev, cmd);
return err;
}
static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,
u8 cmd_id, int channel)
{
struct kvaser_cmd *cmd;
int rc;
cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->id = cmd_id;
cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
cmd->u.simple.channel = channel;
cmd->u.simple.tid = 0xff;
rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
kfree(cmd);
return rc;
}
static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
const struct leaf_cmd_softinfo *softinfo)
{
u32 sw_options = le32_to_cpu(softinfo->sw_options);
dev->fw_version = le32_to_cpu(softinfo->fw_version);
dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);
if (sw_options & KVASER_USB_LEAF_SWOPTION_EXT_CAP)
dev->card_data.capabilities |= KVASER_USB_CAP_EXT_CAP;
if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) {
/* Firmware expects bittiming parameters calculated for 16MHz
* clock, regardless of the actual clock
*/
dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg;
} else {
switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_16mhz;
break;
case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_24mhz;
break;
case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
dev->cfg = &kvaser_usb_leaf_imx_dev_cfg_32mhz;
break;
}
}
}
static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
{
struct kvaser_cmd cmd;
int err;
err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0);
if (err)
return err;
err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd);
if (err)
return err;
switch (dev->driver_info->family) {
case KVASER_LEAF:
kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);
break;
case KVASER_USBCAN:
dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);
dev->max_tx_urbs =
le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);
dev->cfg = &kvaser_usb_leaf_usbcan_dev_cfg;
break;
}
return 0;
}
static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev)
{
int err;
int retry = 3;
/* On some x86 laptops, plugging a Kvaser device again after
* an unplug makes the firmware always ignore the very first
* command. For such a case, provide some room for retries
* instead of completely exiting the driver.
*/
do {
err = kvaser_usb_leaf_get_software_info_inner(dev);
} while (--retry && err == -ETIMEDOUT);
return err;
}
static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev)
{
struct kvaser_cmd cmd;
int err;
err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0);
if (err)
return err;
err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd);
if (err)
return err;
dev->nchannels = cmd.u.cardinfo.nchannels;
if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES ||
(dev->driver_info->family == KVASER_USBCAN &&
dev->nchannels > MAX_USBCAN_NET_DEVICES))
return -EINVAL;
return 0;
}
static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev,
u16 cap_cmd_req, u16 *status)
{
struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
struct kvaser_cmd *cmd;
u32 value = 0;
u32 mask = 0;
u16 cap_cmd_res;
int err;
int i;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->id = CMD_GET_CAPABILITIES_REQ;
cmd->u.leaf.cap_req.cap_cmd = cpu_to_le16(cap_cmd_req);
cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_cap_req);
err = kvaser_usb_send_cmd(dev, cmd, cmd->len);
if (err)
goto end;
err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd);
if (err)
goto end;
*status = le16_to_cpu(cmd->u.leaf.cap_res.status);
if (*status != KVASER_USB_LEAF_CAP_STAT_OK)
goto end;
cap_cmd_res = le16_to_cpu(cmd->u.leaf.cap_res.cap_cmd);
switch (cap_cmd_res) {
case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
value = le32_to_cpu(cmd->u.leaf.cap_res.value);
mask = le32_to_cpu(cmd->u.leaf.cap_res.mask);
break;
default:
dev_warn(&dev->intf->dev, "Unknown capability command %u\n",
cap_cmd_res);
break;
}
for (i = 0; i < dev->nchannels; i++) {
if (BIT(i) & (value & mask)) {
switch (cap_cmd_res) {
case KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE:
card_data->ctrlmode_supported |=
CAN_CTRLMODE_LISTENONLY;
break;
case KVASER_USB_LEAF_CAP_CMD_ERR_REPORT:
card_data->capabilities |=
KVASER_USB_CAP_BERR_CAP;
break;
}
}
}
end:
kfree(cmd);
return err;
}
static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev)
{
int err;
u16 status;
if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) {
dev_info(&dev->intf->dev,
"No extended capability support. Upgrade device firmware.\n");
return 0;
}
err = kvaser_usb_leaf_get_single_capability(dev,
KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE,
&status);
if (err)
return err;
if (status)
dev_info(&dev->intf->dev,
"KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE failed %u\n",
status);
err = kvaser_usb_leaf_get_single_capability(dev,
KVASER_USB_LEAF_CAP_CMD_ERR_REPORT,
&status);
if (err)
return err;
if (status)
dev_info(&dev->intf->dev,
"KVASER_USB_LEAF_CAP_CMD_ERR_REPORT failed %u\n",
status);
return 0;
}
static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev)
{
int err = 0;
if (dev->driver_info->family == KVASER_LEAF)
err = kvaser_usb_leaf_get_capabilities_leaf(dev);
return err;
}
static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct net_device_stats *stats;
struct kvaser_usb_tx_urb_context *context;
struct kvaser_usb_net_priv *priv;
unsigned long flags;
u8 channel, tid;
channel = cmd->u.tx_acknowledge_header.channel;
tid = cmd->u.tx_acknowledge_header.tid;
if (channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", channel);
return;
}
priv = dev->nets[channel];
if (!netif_device_present(priv->netdev))
return;
stats = &priv->netdev->stats;
context = &priv->tx_contexts[tid % dev->max_tx_urbs];
/* Sometimes the state change doesn't come after a bus-off event */
if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) {
struct sk_buff *skb;
struct can_frame *cf;
skb = alloc_can_err_skb(priv->netdev, &cf);
if (skb) {
cf->can_id |= CAN_ERR_RESTARTED;
netif_rx(skb);
} else {
netdev_err(priv->netdev,
"No memory left for err_skb\n");
}
priv->can.can_stats.restarts++;
netif_carrier_on(priv->netdev);
priv->can.state = CAN_STATE_ERROR_ACTIVE;
}
spin_lock_irqsave(&priv->tx_contexts_lock, flags);
stats->tx_packets++;
stats->tx_bytes += can_get_echo_skb(priv->netdev,
context->echo_index, NULL);
context->echo_index = dev->max_tx_urbs;
--priv->active_tx_contexts;
netif_wake_queue(priv->netdev);
spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
}
static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv,
u8 cmd_id)
{
struct kvaser_cmd *cmd;
int err;
cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
if (!cmd)
return -ENOMEM;
cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple);
cmd->id = cmd_id;
cmd->u.simple.channel = priv->channel;
err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len);
if (err)
kfree(cmd);
return err;
}
static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work)
{
struct kvaser_usb_net_leaf_priv *leaf =
container_of(work, struct kvaser_usb_net_leaf_priv,
chip_state_req_work.work);
struct kvaser_usb_net_priv *priv = leaf->net;
kvaser_usb_leaf_simple_cmd_async(priv, CMD_GET_CHIP_STATE);
}
static void
kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,
const struct kvaser_usb_err_summary *es,
struct can_frame *cf)
{
struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
struct kvaser_usb *dev = priv->dev;
struct net_device_stats *stats = &priv->netdev->stats;
enum can_state cur_state, new_state, tx_state, rx_state;
netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status);
new_state = priv->can.state;
cur_state = priv->can.state;
if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
new_state = CAN_STATE_BUS_OFF;
} else if (es->status & M16C_STATE_BUS_PASSIVE) {
new_state = CAN_STATE_ERROR_PASSIVE;
} else if ((es->status & M16C_STATE_BUS_ERROR) &&
cur_state >= CAN_STATE_BUS_OFF) {
/* Guard against spurious error events after a busoff */
} else if (es->txerr >= 128 || es->rxerr >= 128) {
new_state = CAN_STATE_ERROR_PASSIVE;
} else if (es->txerr >= 96 || es->rxerr >= 96) {
new_state = CAN_STATE_ERROR_WARNING;
} else {
new_state = CAN_STATE_ERROR_ACTIVE;
}
/* 0bfd:0124 FW 4.18.778 was observed to send the initial
* CMD_CHIP_STATE_EVENT after CMD_START_CHIP with M16C_STATE_BUS_OFF
* bit set if the channel was bus-off when it was last stopped (even
* across chip resets). This bit will clear shortly afterwards, without
* triggering a second unsolicited chip state event.
* Ignore this initial bus-off.
*/
if (leaf->joining_bus) {
if (new_state == CAN_STATE_BUS_OFF) {
netdev_dbg(priv->netdev, "ignoring bus-off during startup");
new_state = cur_state;
} else {
leaf->joining_bus = false;
}
}
if (new_state != cur_state) {
tx_state = (es->txerr >= es->rxerr) ? new_state : 0;
rx_state = (es->txerr <= es->rxerr) ? new_state : 0;
can_change_state(priv->netdev, cf, tx_state, rx_state);
}
if (priv->can.restart_ms &&
cur_state == CAN_STATE_BUS_OFF &&
new_state < CAN_STATE_BUS_OFF)
priv->can.can_stats.restarts++;
switch (dev->driver_info->family) {
case KVASER_LEAF:
if (es->leaf.error_factor) {
priv->can.can_stats.bus_error++;
stats->rx_errors++;
}
break;
case KVASER_USBCAN:
if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR)
stats->tx_errors++;
if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR)
stats->rx_errors++;
if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
priv->can.can_stats.bus_error++;
break;
}
priv->bec.txerr = es->txerr;
priv->bec.rxerr = es->rxerr;
}
static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev,
const struct kvaser_usb_err_summary *es)
{
struct can_frame *cf;
struct can_frame tmp_cf = { .can_id = CAN_ERR_FLAG,
.len = CAN_ERR_DLC };
struct sk_buff *skb;
struct net_device_stats *stats;
struct kvaser_usb_net_priv *priv;
struct kvaser_usb_net_leaf_priv *leaf;
enum can_state old_state, new_state;
if (es->channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", es->channel);
return;
}
priv = dev->nets[es->channel];
leaf = priv->sub_priv;
stats = &priv->netdev->stats;
/* Ignore e.g. state change to bus-off reported just after stopping */
if (!netif_running(priv->netdev))
return;
/* Update all of the CAN interface's state and error counters before
* trying any memory allocation that can actually fail with -ENOMEM.
*
* We send a temporary stack-allocated error CAN frame to
* can_change_state() for the very same reason.
*
* TODO: Split can_change_state() responsibility between updating the
* CAN interface's state and counters, and the setting up of CAN error
* frame ID and data to userspace. Remove stack allocation afterwards.
*/
old_state = priv->can.state;
kvaser_usb_leaf_rx_error_update_can_state(priv, es, &tmp_cf);
new_state = priv->can.state;
/* If there are errors, request status updates periodically as we do
* not get automatic notifications of improved state.
* Also request updates if we saw a stale BUS_OFF during startup
* (joining_bus).
*/
if (new_state < CAN_STATE_BUS_OFF &&
(es->rxerr || es->txerr || new_state == CAN_STATE_ERROR_PASSIVE ||
leaf->joining_bus))
schedule_delayed_work(&leaf->chip_state_req_work,
msecs_to_jiffies(500));
skb = alloc_can_err_skb(priv->netdev, &cf);
if (!skb) {
stats->rx_dropped++;
return;
}
memcpy(cf, &tmp_cf, sizeof(*cf));
if (new_state != old_state) {
if (es->status &
(M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) {
if (!priv->can.restart_ms)
kvaser_usb_leaf_simple_cmd_async(priv,
CMD_STOP_CHIP);
netif_carrier_off(priv->netdev);
}
if (priv->can.restart_ms &&
old_state == CAN_STATE_BUS_OFF &&
new_state < CAN_STATE_BUS_OFF) {
cf->can_id |= CAN_ERR_RESTARTED;
netif_carrier_on(priv->netdev);
}
}
switch (dev->driver_info->family) {
case KVASER_LEAF:
if (es->leaf.error_factor) {
cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;
if (es->leaf.error_factor & M16C_EF_ACKE)
cf->data[3] = CAN_ERR_PROT_LOC_ACK;
if (es->leaf.error_factor & M16C_EF_CRCE)
cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
if (es->leaf.error_factor & M16C_EF_FORME)
cf->data[2] |= CAN_ERR_PROT_FORM;
if (es->leaf.error_factor & M16C_EF_STFE)
cf->data[2] |= CAN_ERR_PROT_STUFF;
if (es->leaf.error_factor & M16C_EF_BITE0)
cf->data[2] |= CAN_ERR_PROT_BIT0;
if (es->leaf.error_factor & M16C_EF_BITE1)
cf->data[2] |= CAN_ERR_PROT_BIT1;
if (es->leaf.error_factor & M16C_EF_TRE)
cf->data[2] |= CAN_ERR_PROT_TX;
}
break;
case KVASER_USBCAN:
if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR)
cf->can_id |= CAN_ERR_BUSERROR;
break;
}
if (new_state != CAN_STATE_BUS_OFF) {
cf->can_id |= CAN_ERR_CNT;
cf->data[6] = es->txerr;
cf->data[7] = es->rxerr;
}
netif_rx(skb);
}
/* For USBCAN, report error to userspace if the channels's errors counter
* has changed, or we're the only channel seeing a bus error state.
*/
static void
kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev,
struct kvaser_usb_err_summary *es)
{
struct kvaser_usb_net_priv *priv;
unsigned int channel;
bool report_error;
channel = es->channel;
if (channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", channel);
return;
}
priv = dev->nets[channel];
report_error = false;
if (es->txerr != priv->bec.txerr) {
es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR;
report_error = true;
}
if (es->rxerr != priv->bec.rxerr) {
es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR;
report_error = true;
}
if ((es->status & M16C_STATE_BUS_ERROR) &&
!(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) {
es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR;
report_error = true;
}
if (report_error)
kvaser_usb_leaf_rx_error(dev, es);
}
static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct kvaser_usb_err_summary es = { };
switch (cmd->id) {
/* Sometimes errors are sent as unsolicited chip state events */
case CMD_CHIP_STATE_EVENT:
es.channel = cmd->u.usbcan.chip_state_event.channel;
es.status = cmd->u.usbcan.chip_state_event.status;
es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count;
es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count;
kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
break;
case CMD_CAN_ERROR_EVENT:
es.channel = 0;
es.status = cmd->u.usbcan.can_error_event.status_ch0;
es.txerr = cmd->u.usbcan.can_error_event.tx_errors_count_ch0;
es.rxerr = cmd->u.usbcan.can_error_event.rx_errors_count_ch0;
es.usbcan.other_ch_status =
cmd->u.usbcan.can_error_event.status_ch1;
kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
/* The USBCAN firmware supports up to 2 channels.
* Now that ch0 was checked, check if ch1 has any errors.
*/
if (dev->nchannels == MAX_USBCAN_NET_DEVICES) {
es.channel = 1;
es.status = cmd->u.usbcan.can_error_event.status_ch1;
es.txerr =
cmd->u.usbcan.can_error_event.tx_errors_count_ch1;
es.rxerr =
cmd->u.usbcan.can_error_event.rx_errors_count_ch1;
es.usbcan.other_ch_status =
cmd->u.usbcan.can_error_event.status_ch0;
kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es);
}
break;
default:
dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
}
}
static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct kvaser_usb_err_summary es = { };
switch (cmd->id) {
case CMD_CAN_ERROR_EVENT:
es.channel = cmd->u.leaf.can_error_event.channel;
es.status = cmd->u.leaf.can_error_event.status;
es.txerr = cmd->u.leaf.can_error_event.tx_errors_count;
es.rxerr = cmd->u.leaf.can_error_event.rx_errors_count;
es.leaf.error_factor = cmd->u.leaf.can_error_event.error_factor;
break;
case CMD_LEAF_LOG_MESSAGE:
es.channel = cmd->u.leaf.log_message.channel;
es.status = cmd->u.leaf.log_message.data[0];
es.txerr = cmd->u.leaf.log_message.data[2];
es.rxerr = cmd->u.leaf.log_message.data[3];
es.leaf.error_factor = cmd->u.leaf.log_message.data[1];
break;
case CMD_CHIP_STATE_EVENT:
es.channel = cmd->u.leaf.chip_state_event.channel;
es.status = cmd->u.leaf.chip_state_event.status;
es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count;
es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count;
es.leaf.error_factor = 0;
break;
default:
dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id);
return;
}
kvaser_usb_leaf_rx_error(dev, &es);
}
static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv,
const struct kvaser_cmd *cmd)
{
if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
MSG_FLAG_NERR)) {
struct net_device_stats *stats = &priv->netdev->stats;
netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n",
cmd->u.rx_can_header.flag);
stats->rx_errors++;
return;
}
if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN)
kvaser_usb_can_rx_over_error(priv->netdev);
}
static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct kvaser_usb_net_priv *priv;
struct can_frame *cf;
struct sk_buff *skb;
struct net_device_stats *stats;
u8 channel = cmd->u.rx_can_header.channel;
const u8 *rx_data = NULL; /* GCC */
if (channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", channel);
return;
}
priv = dev->nets[channel];
stats = &priv->netdev->stats;
if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) &&
(dev->driver_info->family == KVASER_LEAF &&
cmd->id == CMD_LEAF_LOG_MESSAGE)) {
kvaser_usb_leaf_leaf_rx_error(dev, cmd);
return;
} else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME |
MSG_FLAG_NERR |
MSG_FLAG_OVERRUN)) {
kvaser_usb_leaf_rx_can_err(priv, cmd);
return;
} else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) {
netdev_warn(priv->netdev,
"Unhandled frame (flags: 0x%02x)\n",
cmd->u.rx_can_header.flag);
return;
}
switch (dev->driver_info->family) {
case KVASER_LEAF:
rx_data = cmd->u.leaf.rx_can.data;
break;
case KVASER_USBCAN:
rx_data = cmd->u.usbcan.rx_can.data;
break;
}
skb = alloc_can_skb(priv->netdev, &cf);
if (!skb) {
stats->rx_dropped++;
return;
}
if (dev->driver_info->family == KVASER_LEAF && cmd->id ==
CMD_LEAF_LOG_MESSAGE) {
cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id);
if (cf->can_id & KVASER_EXTENDED_FRAME)
cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
else
cf->can_id &= CAN_SFF_MASK;
cf->len = can_cc_dlc2len(cmd->u.leaf.log_message.dlc);
if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME)
cf->can_id |= CAN_RTR_FLAG;
else
memcpy(cf->data, &cmd->u.leaf.log_message.data,
cf->len);
} else {
cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f);
if (cmd->id == CMD_RX_EXT_MESSAGE) {
cf->can_id <<= 18;
cf->can_id |= ((rx_data[2] & 0x0f) << 14) |
((rx_data[3] & 0xff) << 6) |
(rx_data[4] & 0x3f);
cf->can_id |= CAN_EFF_FLAG;
}
cf->len = can_cc_dlc2len(rx_data[5]);
if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME)
cf->can_id |= CAN_RTR_FLAG;
else
memcpy(cf->data, &rx_data[6], cf->len);
}
stats->rx_packets++;
if (!(cf->can_id & CAN_RTR_FLAG))
stats->rx_bytes += cf->len;
netif_rx(skb);
}
static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
u16 info1 = 0;
switch (dev->driver_info->family) {
case KVASER_LEAF:
info1 = le16_to_cpu(cmd->u.leaf.error_event.info1);
break;
case KVASER_USBCAN:
info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1);
break;
}
/* info1 will contain the offending cmd_no */
switch (info1) {
case CMD_SET_CTRL_MODE:
dev_warn(&dev->intf->dev,
"CMD_SET_CTRL_MODE error in parameter\n");
break;
case CMD_SET_BUS_PARAMS:
dev_warn(&dev->intf->dev,
"CMD_SET_BUS_PARAMS error in parameter\n");
break;
default:
dev_warn(&dev->intf->dev,
"Unhandled parameter error event cmd_no (%u)\n",
info1);
break;
}
}
static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
u8 error_code = 0;
switch (dev->driver_info->family) {
case KVASER_LEAF:
error_code = cmd->u.leaf.error_event.error_code;
break;
case KVASER_USBCAN:
error_code = cmd->u.usbcan.error_event.error_code;
break;
}
switch (error_code) {
case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL:
/* Received additional CAN message, when firmware TX queue is
* already full. Something is wrong with the driver.
* This should never happen!
*/
dev_err(&dev->intf->dev,
"Received error event TX_QUEUE_FULL\n");
break;
case KVASER_USB_LEAF_ERROR_EVENT_PARAM:
kvaser_usb_leaf_error_event_parameter(dev, cmd);
break;
default:
dev_warn(&dev->intf->dev,
"Unhandled error event (%d)\n", error_code);
break;
}
}
static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct kvaser_usb_net_priv *priv;
u8 channel = cmd->u.simple.channel;
if (channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", channel);
return;
}
priv = dev->nets[channel];
if (completion_done(&priv->start_comp) &&
netif_queue_stopped(priv->netdev)) {
netif_wake_queue(priv->netdev);
} else {
netif_start_queue(priv->netdev);
complete(&priv->start_comp);
}
}
static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct kvaser_usb_net_priv *priv;
u8 channel = cmd->u.simple.channel;
if (channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", channel);
return;
}
priv = dev->nets[channel];
complete(&priv->stop_comp);
}
static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
struct kvaser_usb_net_priv *priv;
u8 channel = cmd->u.busparams.channel;
if (channel >= dev->nchannels) {
dev_err(&dev->intf->dev,
"Invalid channel number (%d)\n", channel);
return;
}
priv = dev->nets[channel];
memcpy(&priv->busparams_nominal, &cmd->u.busparams.busparams,
sizeof(priv->busparams_nominal));
complete(&priv->get_busparams_comp);
}
static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev,
const struct kvaser_cmd *cmd)
{
if (kvaser_usb_leaf_verify_size(dev, cmd) < 0)
return;
switch (cmd->id) {
case CMD_START_CHIP_REPLY:
kvaser_usb_leaf_start_chip_reply(dev, cmd);
break;
case CMD_STOP_CHIP_REPLY:
kvaser_usb_leaf_stop_chip_reply(dev, cmd);
break;
case CMD_RX_STD_MESSAGE:
case CMD_RX_EXT_MESSAGE:
kvaser_usb_leaf_rx_can_msg(dev, cmd);
break;
case CMD_LEAF_LOG_MESSAGE:
if (dev->driver_info->family != KVASER_LEAF)
goto warn;
kvaser_usb_leaf_rx_can_msg(dev, cmd);
break;
case CMD_CHIP_STATE_EVENT:
case CMD_CAN_ERROR_EVENT:
if (dev->driver_info->family == KVASER_LEAF)
kvaser_usb_leaf_leaf_rx_error(dev, cmd);
else
kvaser_usb_leaf_usbcan_rx_error(dev, cmd);
break;
case CMD_TX_ACKNOWLEDGE:
kvaser_usb_leaf_tx_acknowledge(dev, cmd);
break;
case CMD_ERROR_EVENT:
kvaser_usb_leaf_error_event(dev, cmd);
break;
case CMD_GET_BUS_PARAMS_REPLY:
kvaser_usb_leaf_get_busparams_reply(dev, cmd);
break;
/* Ignored commands */
case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:
if (dev->driver_info->family != KVASER_USBCAN)
goto warn;
break;
case CMD_FLUSH_QUEUE_REPLY:
if (dev->driver_info->family != KVASER_LEAF)
goto warn;
break;
default:
warn: dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id);
break;
}
}
static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev,
void *buf, int len)
{
struct kvaser_cmd *cmd;
int pos = 0;
while (pos <= len - CMD_HEADER_LEN) {
cmd = buf + pos;
/* The Kvaser firmware can only read and write commands that
* does not cross the USB's endpoint wMaxPacketSize boundary.
* If a follow-up command crosses such boundary, firmware puts
* a placeholder zero-length command in its place then aligns
* the real command to the next max packet size.
*
* Handle such cases or we're going to miss a significant
* number of events in case of a heavy rx load on the bus.
*/
if (cmd->len == 0) {
pos = round_up(pos, le16_to_cpu
(dev->bulk_in->wMaxPacketSize));
continue;
}
if (pos + cmd->len > len) {
dev_err_ratelimited(&dev->intf->dev, "Format error\n");
break;
}
kvaser_usb_leaf_handle_command(dev, cmd);
pos += cmd->len;
}
}
static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv)
{
struct kvaser_cmd *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->id = CMD_SET_CTRL_MODE;
cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode);
cmd->u.ctrl_mode.tid = 0xff;
cmd->u.ctrl_mode.channel = priv->channel;
if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
else
cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
kfree(cmd);
return rc;
}
static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv)
{
struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
int err;
leaf->joining_bus = true;
reinit_completion(&priv->start_comp);
err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP,
priv->channel);
if (err)
return err;
if (!wait_for_completion_timeout(&priv->start_comp,
msecs_to_jiffies(KVASER_USB_TIMEOUT)))
return -ETIMEDOUT;
return 0;
}
static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv)
{
struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
int err;
reinit_completion(&priv->stop_comp);
cancel_delayed_work(&leaf->chip_state_req_work);
err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP,
priv->channel);
if (err)
return err;
if (!wait_for_completion_timeout(&priv->stop_comp,
msecs_to_jiffies(KVASER_USB_TIMEOUT)))
return -ETIMEDOUT;
return 0;
}
static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel)
{
return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel);
}
static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv)
{
struct kvaser_cmd *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->id = CMD_FLUSH_QUEUE;
cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue);
cmd->u.flush_queue.channel = priv->channel;
cmd->u.flush_queue.flags = 0x00;
rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len);
kfree(cmd);
return rc;
}
static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev)
{
struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
return 0;
}
static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv)
{
struct kvaser_usb_net_leaf_priv *leaf;
leaf = devm_kzalloc(&priv->dev->intf->dev, sizeof(*leaf), GFP_KERNEL);
if (!leaf)
return -ENOMEM;
leaf->net = priv;
INIT_DELAYED_WORK(&leaf->chip_state_req_work,
kvaser_usb_leaf_chip_state_req_work);
priv->sub_priv = leaf;
return 0;
}
static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv)
{
struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
if (leaf)
cancel_delayed_work_sync(&leaf->chip_state_req_work);
}
static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev,
const struct kvaser_usb_busparams *busparams)
{
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
struct kvaser_usb *dev = priv->dev;
struct kvaser_cmd *cmd;
int rc;
cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->id = CMD_SET_BUS_PARAMS;
cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams);
cmd->u.busparams.channel = priv->channel;
cmd->u.busparams.tid = 0xff;
memcpy(&cmd->u.busparams.busparams, busparams,
sizeof(cmd->u.busparams.busparams));
rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
kfree(cmd);
return rc;
}
static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv)
{
int err;
if (priv->dev->driver_info->family == KVASER_USBCAN)
return -EOPNOTSUPP;
reinit_completion(&priv->get_busparams_comp);
err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_GET_BUS_PARAMS,
priv->channel);
if (err)
return err;
if (!wait_for_completion_timeout(&priv->get_busparams_comp,
msecs_to_jiffies(KVASER_USB_TIMEOUT)))
return -ETIMEDOUT;
return 0;
}
static int kvaser_usb_leaf_set_mode(struct net_device *netdev,
enum can_mode mode)
{
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
struct kvaser_usb_net_leaf_priv *leaf = priv->sub_priv;
int err;
switch (mode) {
case CAN_MODE_START:
kvaser_usb_unlink_tx_urbs(priv);
leaf->joining_bus = true;
err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP);
if (err)
return err;
priv->can.state = CAN_STATE_ERROR_ACTIVE;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev,
struct can_berr_counter *bec)
{
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
*bec = priv->bec;
return 0;
}
static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev)
{
const struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int i;
iface_desc = dev->intf->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (!dev->bulk_in && usb_endpoint_is_bulk_in(endpoint))
dev->bulk_in = endpoint;
if (!dev->bulk_out && usb_endpoint_is_bulk_out(endpoint))
dev->bulk_out = endpoint;
/* use first bulk endpoint for in and out */
if (dev->bulk_in && dev->bulk_out)
return 0;
}
return -ENODEV;
}
const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = {
.dev_set_mode = kvaser_usb_leaf_set_mode,
.dev_set_bittiming = kvaser_usb_leaf_set_bittiming,
.dev_get_busparams = kvaser_usb_leaf_get_busparams,
.dev_set_data_bittiming = NULL,
.dev_get_data_busparams = NULL,
.dev_get_berr_counter = kvaser_usb_leaf_get_berr_counter,
.dev_setup_endpoints = kvaser_usb_leaf_setup_endpoints,
.dev_init_card = kvaser_usb_leaf_init_card,
.dev_init_channel = kvaser_usb_leaf_init_channel,
.dev_remove_channel = kvaser_usb_leaf_remove_channel,
.dev_get_software_info = kvaser_usb_leaf_get_software_info,
.dev_get_software_details = NULL,
.dev_get_card_info = kvaser_usb_leaf_get_card_info,
.dev_get_capabilities = kvaser_usb_leaf_get_capabilities,
.dev_set_opt_mode = kvaser_usb_leaf_set_opt_mode,
.dev_start_chip = kvaser_usb_leaf_start_chip,
.dev_stop_chip = kvaser_usb_leaf_stop_chip,
.dev_reset_chip = kvaser_usb_leaf_reset_chip,
.dev_flush_queue = kvaser_usb_leaf_flush_queue,
.dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback,
.dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd,
};