// SPDX-License-Identifier: GPL-2.0
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/* Parts of this driver are based on the following:
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* - Kvaser linux leaf driver (version 4.78)
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* - CAN driver for esd CAN-USB/2
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* - Kvaser linux usbcanII driver (version 5.3)
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*
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* Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
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* Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
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* Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
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* Copyright (C) 2015 Valeo S.A.
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*/
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/gfp.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/usb.h>
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#include <linux/can.h>
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#include <linux/can/dev.h>
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#include <linux/can/error.h>
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#include <linux/can/netlink.h>
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#include "kvaser_usb.h"
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|
#define MAX_USBCAN_NET_DEVICES 2
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|
/* Command header size */
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#define CMD_HEADER_LEN 2
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/* Kvaser CAN message flags */
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#define MSG_FLAG_ERROR_FRAME BIT(0)
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#define MSG_FLAG_OVERRUN BIT(1)
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#define MSG_FLAG_NERR BIT(2)
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#define MSG_FLAG_WAKEUP BIT(3)
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#define MSG_FLAG_REMOTE_FRAME BIT(4)
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#define MSG_FLAG_RESERVED BIT(5)
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#define MSG_FLAG_TX_ACK BIT(6)
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#define MSG_FLAG_TX_REQUEST BIT(7)
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/* CAN states (M16C CxSTRH register) */
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#define M16C_STATE_BUS_RESET BIT(0)
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#define M16C_STATE_BUS_ERROR BIT(4)
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#define M16C_STATE_BUS_PASSIVE BIT(5)
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#define M16C_STATE_BUS_OFF BIT(6)
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|
/* Leaf/usbcan command ids */
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#define CMD_RX_STD_MESSAGE 12
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#define CMD_TX_STD_MESSAGE 13
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#define CMD_RX_EXT_MESSAGE 14
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#define CMD_TX_EXT_MESSAGE 15
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#define CMD_SET_BUS_PARAMS 16
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#define CMD_CHIP_STATE_EVENT 20
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#define CMD_SET_CTRL_MODE 21
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#define CMD_RESET_CHIP 24
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#define CMD_START_CHIP 26
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#define CMD_START_CHIP_REPLY 27
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#define CMD_STOP_CHIP 28
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#define CMD_STOP_CHIP_REPLY 29
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|
#define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33
|
|
#define CMD_GET_CARD_INFO 34
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#define CMD_GET_CARD_INFO_REPLY 35
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#define CMD_GET_SOFTWARE_INFO 38
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#define CMD_GET_SOFTWARE_INFO_REPLY 39
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#define CMD_FLUSH_QUEUE 48
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#define CMD_TX_ACKNOWLEDGE 50
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#define CMD_CAN_ERROR_EVENT 51
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#define CMD_FLUSH_QUEUE_REPLY 68
|
|
#define CMD_LEAF_LOG_MESSAGE 106
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|
/* Leaf frequency options */
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#define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60
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#define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0
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#define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)
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#define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)
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/* error factors */
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#define M16C_EF_ACKE BIT(0)
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#define M16C_EF_CRCE BIT(1)
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#define M16C_EF_FORME BIT(2)
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#define M16C_EF_STFE BIT(3)
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#define M16C_EF_BITE0 BIT(4)
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#define M16C_EF_BITE1 BIT(5)
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#define M16C_EF_RCVE BIT(6)
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#define M16C_EF_TRE BIT(7)
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/* Only Leaf-based devices can report M16C error factors,
|
* thus define our own error status flags for USBCANII
|
*/
|
#define USBCAN_ERROR_STATE_NONE 0
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#define USBCAN_ERROR_STATE_TX_ERROR BIT(0)
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#define USBCAN_ERROR_STATE_RX_ERROR BIT(1)
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#define USBCAN_ERROR_STATE_BUSERROR BIT(2)
|
|
/* ctrl modes */
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#define KVASER_CTRL_MODE_NORMAL 1
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#define KVASER_CTRL_MODE_SILENT 2
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#define KVASER_CTRL_MODE_SELFRECEPTION 3
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#define KVASER_CTRL_MODE_OFF 4
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|
/* Extended CAN identifier flag */
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#define KVASER_EXTENDED_FRAME BIT(31)
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|
struct kvaser_cmd_simple {
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u8 tid;
|
u8 channel;
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} __packed;
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|
struct kvaser_cmd_cardinfo {
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u8 tid;
|
u8 nchannels;
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__le32 serial_number;
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__le32 padding0;
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__le32 clock_resolution;
|
__le32 mfgdate;
|
u8 ean[8];
|
u8 hw_revision;
|
union {
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struct {
|
u8 usb_hs_mode;
|
} __packed leaf1;
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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];
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__le32 fw_version;
|
__le16 checksum;
|
__le16 sw_options;
|
} __packed;
|
|
struct kvaser_cmd_busparams {
|
u8 tid;
|
u8 channel;
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__le32 bitrate;
|
u8 tseg1;
|
u8 tseg2;
|
u8 sjw;
|
u8 no_samp;
|
} __packed;
|
|
struct kvaser_cmd_tx_can {
|
u8 channel;
|
u8 tid;
|
u8 data[14];
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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];
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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_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_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;
|
|
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;
|
|
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;
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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_error_event error_event;
|
struct leaf_cmd_log_message log_message;
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} __packed leaf;
|
|
union {
|
struct usbcan_cmd_softinfo softinfo;
|
struct usbcan_cmd_rx_can rx_can;
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struct usbcan_cmd_chip_state_event chip_state_event;
|
struct usbcan_cmd_error_event error_event;
|
} __packed usbcan;
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|
struct kvaser_cmd_tx_can tx_can;
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struct kvaser_cmd_ctrl_mode ctrl_mode;
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struct kvaser_cmd_flush_queue flush_queue;
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} u;
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} __packed;
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|
#define CMD_SIZE_ANY 0xff
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#define kvaser_fsize(field) sizeof_field(struct kvaser_cmd, field)
|
|
static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = {
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[CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),
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[CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),
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[CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),
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[CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.tx_acknowledge_header),
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[CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.leaf.softinfo),
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[CMD_RX_STD_MESSAGE] = kvaser_fsize(u.leaf.rx_can),
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[CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.leaf.rx_can),
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[CMD_LEAF_LOG_MESSAGE] = kvaser_fsize(u.leaf.log_message),
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[CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.leaf.chip_state_event),
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[CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.leaf.error_event),
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/* ignored events: */
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[CMD_FLUSH_QUEUE_REPLY] = CMD_SIZE_ANY,
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};
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|
static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = {
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[CMD_START_CHIP_REPLY] = kvaser_fsize(u.simple),
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[CMD_STOP_CHIP_REPLY] = kvaser_fsize(u.simple),
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[CMD_GET_CARD_INFO_REPLY] = kvaser_fsize(u.cardinfo),
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[CMD_TX_ACKNOWLEDGE] = kvaser_fsize(u.tx_acknowledge_header),
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[CMD_GET_SOFTWARE_INFO_REPLY] = kvaser_fsize(u.usbcan.softinfo),
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[CMD_RX_STD_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),
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[CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.usbcan.rx_can),
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[CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.usbcan.chip_state_event),
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[CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.usbcan.error_event),
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/* ignored events: */
|
[CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = CMD_SIZE_ANY,
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};
|
|
/* 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.
|
*/
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struct kvaser_usb_err_summary {
|
u8 channel, status, txerr, rxerr;
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union {
|
struct {
|
u8 error_factor;
|
} leaf;
|
struct {
|
u8 other_ch_status;
|
u8 error_state;
|
} usbcan;
|
};
|
};
|
|
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 = 8000000,
|
},
|
.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 = 16000000,
|
},
|
.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 = 16000000,
|
},
|
.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 = 24000000,
|
},
|
.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 = 32000000,
|
},
|
.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 *frame_len,
|
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;
|
|
*frame_len = cf->can_dlc;
|
|
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->can_dlc;
|
memcpy(&cmd->u.tx_can.data[6], cf->data, cf->can_dlc);
|
|
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 (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 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;
|
|
stats->rx_packets++;
|
stats->rx_bytes += cf->can_dlc;
|
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;
|
}
|
|
stats->tx_packets++;
|
stats->tx_bytes += context->dlc;
|
|
spin_lock_irqsave(&priv->tx_contexts_lock, flags);
|
|
can_get_echo_skb(priv->netdev, context->echo_index);
|
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_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 *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) {
|
/* Guard against spurious error events after a busoff */
|
if (cur_state < CAN_STATE_BUS_OFF) {
|
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 if (cur_state > CAN_STATE_ERROR_ACTIVE)
|
new_state = CAN_STATE_ERROR_ACTIVE;
|
}
|
}
|
|
if (!es->status)
|
new_state = CAN_STATE_ERROR_ACTIVE;
|
|
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,
|
.can_dlc = CAN_ERR_DLC };
|
struct sk_buff *skb;
|
struct net_device_stats *stats;
|
struct kvaser_usb_net_priv *priv;
|
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];
|
stats = &priv->netdev->stats;
|
|
/* 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;
|
|
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->data[6] = es->txerr;
|
cf->data[7] = es->rxerr;
|
}
|
|
stats->rx_packets++;
|
stats->rx_bytes += cf->can_dlc;
|
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.error_event.status_ch0;
|
es.txerr = cmd->u.usbcan.error_event.tx_errors_count_ch0;
|
es.rxerr = cmd->u.usbcan.error_event.rx_errors_count_ch0;
|
es.usbcan.other_ch_status =
|
cmd->u.usbcan.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.error_event.status_ch1;
|
es.txerr =
|
cmd->u.usbcan.error_event.tx_errors_count_ch1;
|
es.rxerr =
|
cmd->u.usbcan.error_event.rx_errors_count_ch1;
|
es.usbcan.other_ch_status =
|
cmd->u.usbcan.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.error_event.channel;
|
es.status = cmd->u.leaf.error_event.status;
|
es.txerr = cmd->u.leaf.error_event.tx_errors_count;
|
es.rxerr = cmd->u.leaf.error_event.rx_errors_count;
|
es.leaf.error_factor = cmd->u.leaf.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->can_dlc = get_can_dlc(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->can_dlc);
|
} 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->can_dlc = get_can_dlc(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->can_dlc);
|
}
|
|
stats->rx_packets++;
|
stats->rx_bytes += cf->can_dlc;
|
netif_rx(skb);
|
}
|
|
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_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;
|
|
/* 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)
|
{
|
int err;
|
|
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)
|
{
|
int err;
|
|
reinit_completion(&priv->stop_comp);
|
|
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_set_bittiming(struct net_device *netdev)
|
{
|
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
|
struct can_bittiming *bt = &priv->can.bittiming;
|
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;
|
cmd->u.busparams.bitrate = cpu_to_le32(bt->bitrate);
|
cmd->u.busparams.sjw = bt->sjw;
|
cmd->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1;
|
cmd->u.busparams.tseg2 = bt->phase_seg2;
|
|
if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
|
cmd->u.busparams.no_samp = 3;
|
else
|
cmd->u.busparams.no_samp = 1;
|
|
rc = kvaser_usb_send_cmd(dev, cmd, cmd->len);
|
|
kfree(cmd);
|
return rc;
|
}
|
|
static int kvaser_usb_leaf_set_mode(struct net_device *netdev,
|
enum can_mode mode)
|
{
|
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
|
int err;
|
|
switch (mode) {
|
case CAN_MODE_START:
|
kvaser_usb_unlink_tx_urbs(priv);
|
|
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_set_data_bittiming = 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_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 = NULL,
|
.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,
|
};
|
