1648 lines
38 KiB
C
1648 lines
38 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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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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*
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* Copyright (C) 2002-2006 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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*/
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#include <linux/init.h>
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#include <linux/completion.h>
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#include <linux/module.h>
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#include <linux/netdevice.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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#define MAX_TX_URBS 16
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#define MAX_RX_URBS 4
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#define START_TIMEOUT 1000 /* msecs */
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#define STOP_TIMEOUT 1000 /* msecs */
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#define USB_SEND_TIMEOUT 1000 /* msecs */
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#define USB_RECV_TIMEOUT 1000 /* msecs */
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#define RX_BUFFER_SIZE 3072
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#define CAN_USB_CLOCK 8000000
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#define MAX_NET_DEVICES 3
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/* Kvaser USB devices */
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#define KVASER_VENDOR_ID 0x0bfd
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#define USB_LEAF_DEVEL_PRODUCT_ID 10
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#define USB_LEAF_LITE_PRODUCT_ID 11
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#define USB_LEAF_PRO_PRODUCT_ID 12
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#define USB_LEAF_SPRO_PRODUCT_ID 14
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#define USB_LEAF_PRO_LS_PRODUCT_ID 15
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#define USB_LEAF_PRO_SWC_PRODUCT_ID 16
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#define USB_LEAF_PRO_LIN_PRODUCT_ID 17
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#define USB_LEAF_SPRO_LS_PRODUCT_ID 18
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#define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
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#define USB_MEMO2_DEVEL_PRODUCT_ID 22
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#define USB_MEMO2_HSHS_PRODUCT_ID 23
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#define USB_UPRO_HSHS_PRODUCT_ID 24
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#define USB_LEAF_LITE_GI_PRODUCT_ID 25
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#define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
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#define USB_MEMO2_HSLS_PRODUCT_ID 27
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#define USB_LEAF_LITE_CH_PRODUCT_ID 28
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#define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
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#define USB_OEM_MERCURY_PRODUCT_ID 34
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#define USB_OEM_LEAF_PRODUCT_ID 35
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#define USB_CAN_R_PRODUCT_ID 39
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/* USB devices features */
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#define KVASER_HAS_SILENT_MODE BIT(0)
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#define KVASER_HAS_TXRX_ERRORS BIT(1)
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/* Message header size */
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#define MSG_HEADER_LEN 2
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/* 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 */
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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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/* Can msg 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_GET_BUS_PARAMS 17
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#define CMD_GET_BUS_PARAMS_REPLY 18
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#define CMD_GET_CHIP_STATE 19
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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_GET_CTRL_MODE 22
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#define CMD_GET_CTRL_MODE_REPLY 23
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#define CMD_RESET_CHIP 24
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#define CMD_RESET_CARD 25
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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_GET_CARD_INFO2 32
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#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_ERROR_EVENT 45
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#define CMD_FLUSH_QUEUE 48
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#define CMD_RESET_ERROR_COUNTER 49
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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_USB_THROTTLE 77
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#define CMD_LOG_MESSAGE 106
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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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/* bittiming parameters */
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#define KVASER_USB_TSEG1_MIN 1
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#define KVASER_USB_TSEG1_MAX 16
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#define KVASER_USB_TSEG2_MIN 1
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#define KVASER_USB_TSEG2_MAX 8
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#define KVASER_USB_SJW_MAX 4
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#define KVASER_USB_BRP_MIN 1
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#define KVASER_USB_BRP_MAX 64
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#define KVASER_USB_BRP_INC 1
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/* 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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/* log message */
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#define KVASER_EXTENDED_FRAME BIT(31)
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struct kvaser_msg_simple {
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u8 tid;
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u8 channel;
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} __packed;
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struct kvaser_msg_cardinfo {
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u8 tid;
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u8 nchannels;
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__le32 serial_number;
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__le32 padding;
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__le32 clock_resolution;
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__le32 mfgdate;
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u8 ean[8];
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u8 hw_revision;
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u8 usb_hs_mode;
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__le16 padding2;
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} __packed;
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struct kvaser_msg_cardinfo2 {
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u8 tid;
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u8 channel;
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u8 pcb_id[24];
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__le32 oem_unlock_code;
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} __packed;
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struct kvaser_msg_softinfo {
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u8 tid;
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u8 channel;
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__le32 sw_options;
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__le32 fw_version;
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__le16 max_outstanding_tx;
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__le16 padding[9];
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} __packed;
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struct kvaser_msg_busparams {
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u8 tid;
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u8 channel;
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__le32 bitrate;
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u8 tseg1;
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u8 tseg2;
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u8 sjw;
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u8 no_samp;
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} __packed;
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struct kvaser_msg_tx_can {
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u8 channel;
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u8 tid;
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u8 msg[14];
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u8 padding;
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u8 flags;
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} __packed;
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struct kvaser_msg_rx_can {
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u8 channel;
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u8 flag;
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__le16 time[3];
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u8 msg[14];
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} __packed;
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struct kvaser_msg_chip_state_event {
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u8 tid;
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u8 channel;
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__le16 time[3];
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u8 tx_errors_count;
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u8 rx_errors_count;
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u8 status;
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u8 padding[3];
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} __packed;
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struct kvaser_msg_tx_acknowledge {
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u8 channel;
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u8 tid;
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__le16 time[3];
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u8 flags;
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u8 time_offset;
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} __packed;
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struct kvaser_msg_error_event {
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u8 tid;
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u8 flags;
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__le16 time[3];
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u8 channel;
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u8 padding;
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u8 tx_errors_count;
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u8 rx_errors_count;
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u8 status;
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u8 error_factor;
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} __packed;
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struct kvaser_msg_ctrl_mode {
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u8 tid;
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u8 channel;
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u8 ctrl_mode;
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u8 padding[3];
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} __packed;
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struct kvaser_msg_flush_queue {
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u8 tid;
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u8 channel;
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u8 flags;
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u8 padding[3];
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} __packed;
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struct kvaser_msg_log_message {
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u8 channel;
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u8 flags;
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__le16 time[3];
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u8 dlc;
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u8 time_offset;
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__le32 id;
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u8 data[8];
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} __packed;
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struct kvaser_msg {
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u8 len;
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u8 id;
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union {
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struct kvaser_msg_simple simple;
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struct kvaser_msg_cardinfo cardinfo;
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struct kvaser_msg_cardinfo2 cardinfo2;
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struct kvaser_msg_softinfo softinfo;
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struct kvaser_msg_busparams busparams;
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struct kvaser_msg_tx_can tx_can;
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struct kvaser_msg_rx_can rx_can;
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struct kvaser_msg_chip_state_event chip_state_event;
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struct kvaser_msg_tx_acknowledge tx_acknowledge;
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struct kvaser_msg_error_event error_event;
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struct kvaser_msg_ctrl_mode ctrl_mode;
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struct kvaser_msg_flush_queue flush_queue;
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struct kvaser_msg_log_message log_message;
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} u;
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} __packed;
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struct kvaser_usb_tx_urb_context {
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struct kvaser_usb_net_priv *priv;
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u32 echo_index;
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int dlc;
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};
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struct kvaser_usb {
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struct usb_device *udev;
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struct kvaser_usb_net_priv *nets[MAX_NET_DEVICES];
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struct usb_endpoint_descriptor *bulk_in, *bulk_out;
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struct usb_anchor rx_submitted;
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u32 fw_version;
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unsigned int nchannels;
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bool rxinitdone;
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void *rxbuf[MAX_RX_URBS];
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dma_addr_t rxbuf_dma[MAX_RX_URBS];
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};
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struct kvaser_usb_net_priv {
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struct can_priv can;
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atomic_t active_tx_urbs;
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struct usb_anchor tx_submitted;
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struct kvaser_usb_tx_urb_context tx_contexts[MAX_TX_URBS];
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struct completion start_comp, stop_comp;
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struct kvaser_usb *dev;
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struct net_device *netdev;
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int channel;
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struct can_berr_counter bec;
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};
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static const struct usb_device_id kvaser_usb_table[] = {
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS |
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KVASER_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
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.driver_info = KVASER_HAS_TXRX_ERRORS },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
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static inline int kvaser_usb_send_msg(const struct kvaser_usb *dev,
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struct kvaser_msg *msg)
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{
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int actual_len;
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return usb_bulk_msg(dev->udev,
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usb_sndbulkpipe(dev->udev,
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dev->bulk_out->bEndpointAddress),
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msg, msg->len, &actual_len,
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USB_SEND_TIMEOUT);
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}
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static int kvaser_usb_wait_msg(const struct kvaser_usb *dev, u8 id,
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struct kvaser_msg *msg)
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{
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struct kvaser_msg *tmp;
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void *buf;
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int actual_len;
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int err;
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int pos = 0;
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buf = kzalloc(RX_BUFFER_SIZE, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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err = usb_bulk_msg(dev->udev,
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usb_rcvbulkpipe(dev->udev,
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dev->bulk_in->bEndpointAddress),
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buf, RX_BUFFER_SIZE, &actual_len,
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USB_RECV_TIMEOUT);
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if (err < 0)
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goto end;
|
|
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while (pos <= actual_len - MSG_HEADER_LEN) {
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tmp = buf + pos;
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if (!tmp->len)
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break;
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if (pos + tmp->len > actual_len) {
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dev_err(dev->udev->dev.parent, "Format error\n");
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break;
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}
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if (tmp->id == id) {
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memcpy(msg, tmp, tmp->len);
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goto end;
|
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}
|
|
|
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pos += tmp->len;
|
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}
|
|
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err = -EINVAL;
|
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|
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end:
|
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kfree(buf);
|
|
|
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return err;
|
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}
|
|
|
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static int kvaser_usb_send_simple_msg(const struct kvaser_usb *dev,
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u8 msg_id, int channel)
|
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{
|
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struct kvaser_msg *msg;
|
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int rc;
|
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msg = kmalloc(sizeof(*msg), GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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|
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msg->id = msg_id;
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msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple);
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msg->u.simple.channel = channel;
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msg->u.simple.tid = 0xff;
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rc = kvaser_usb_send_msg(dev, msg);
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|
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kfree(msg);
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return rc;
|
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}
|
|
|
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static int kvaser_usb_get_software_info(struct kvaser_usb *dev)
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{
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struct kvaser_msg msg;
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int err;
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|
|
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err = kvaser_usb_send_simple_msg(dev, CMD_GET_SOFTWARE_INFO, 0);
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if (err)
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return err;
|
|
|
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err = kvaser_usb_wait_msg(dev, CMD_GET_SOFTWARE_INFO_REPLY, &msg);
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if (err)
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return err;
|
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|
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dev->fw_version = le32_to_cpu(msg.u.softinfo.fw_version);
|
|
|
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return 0;
|
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}
|
|
|
|
static int kvaser_usb_get_card_info(struct kvaser_usb *dev)
|
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{
|
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struct kvaser_msg msg;
|
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int err;
|
|
|
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err = kvaser_usb_send_simple_msg(dev, CMD_GET_CARD_INFO, 0);
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if (err)
|
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return err;
|
|
|
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err = kvaser_usb_wait_msg(dev, CMD_GET_CARD_INFO_REPLY, &msg);
|
|
if (err)
|
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return err;
|
|
|
|
dev->nchannels = msg.u.cardinfo.nchannels;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
struct net_device_stats *stats;
|
|
struct kvaser_usb_tx_urb_context *context;
|
|
struct kvaser_usb_net_priv *priv;
|
|
struct sk_buff *skb;
|
|
struct can_frame *cf;
|
|
u8 channel = msg->u.tx_acknowledge.channel;
|
|
u8 tid = msg->u.tx_acknowledge.tid;
|
|
|
|
if (channel >= dev->nchannels) {
|
|
dev_err(dev->udev->dev.parent,
|
|
"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 % 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)) {
|
|
skb = alloc_can_err_skb(priv->netdev, &cf);
|
|
if (skb) {
|
|
cf->can_id |= CAN_ERR_RESTARTED;
|
|
netif_rx(skb);
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += cf->can_dlc;
|
|
} 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;
|
|
can_get_echo_skb(priv->netdev, context->echo_index);
|
|
|
|
context->echo_index = MAX_TX_URBS;
|
|
atomic_dec(&priv->active_tx_urbs);
|
|
|
|
netif_wake_queue(priv->netdev);
|
|
}
|
|
|
|
static void kvaser_usb_simple_msg_callback(struct urb *urb)
|
|
{
|
|
struct net_device *netdev = urb->context;
|
|
|
|
kfree(urb->transfer_buffer);
|
|
|
|
if (urb->status)
|
|
netdev_warn(netdev, "urb status received: %d\n",
|
|
urb->status);
|
|
}
|
|
|
|
static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv *priv,
|
|
u8 msg_id)
|
|
{
|
|
struct kvaser_usb *dev = priv->dev;
|
|
struct net_device *netdev = priv->netdev;
|
|
struct kvaser_msg *msg;
|
|
struct urb *urb;
|
|
void *buf;
|
|
int err;
|
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
|
if (!urb) {
|
|
netdev_err(netdev, "No memory left for URBs\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC);
|
|
if (!buf) {
|
|
usb_free_urb(urb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
msg = (struct kvaser_msg *)buf;
|
|
msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple);
|
|
msg->id = msg_id;
|
|
msg->u.simple.channel = priv->channel;
|
|
|
|
usb_fill_bulk_urb(urb, dev->udev,
|
|
usb_sndbulkpipe(dev->udev,
|
|
dev->bulk_out->bEndpointAddress),
|
|
buf, msg->len,
|
|
kvaser_usb_simple_msg_callback, priv);
|
|
usb_anchor_urb(urb, &priv->tx_submitted);
|
|
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (err) {
|
|
netdev_err(netdev, "Error transmitting URB\n");
|
|
usb_unanchor_urb(urb);
|
|
usb_free_urb(urb);
|
|
kfree(buf);
|
|
return err;
|
|
}
|
|
|
|
usb_free_urb(urb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
|
|
{
|
|
int i;
|
|
|
|
usb_kill_anchored_urbs(&priv->tx_submitted);
|
|
atomic_set(&priv->active_tx_urbs, 0);
|
|
|
|
for (i = 0; i < MAX_TX_URBS; i++)
|
|
priv->tx_contexts[i].echo_index = MAX_TX_URBS;
|
|
}
|
|
|
|
static void kvaser_usb_rx_error(const struct kvaser_usb *dev,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
struct can_frame *cf;
|
|
struct sk_buff *skb;
|
|
struct net_device_stats *stats;
|
|
struct kvaser_usb_net_priv *priv;
|
|
unsigned int new_state;
|
|
u8 channel, status, txerr, rxerr, error_factor;
|
|
|
|
switch (msg->id) {
|
|
case CMD_CAN_ERROR_EVENT:
|
|
channel = msg->u.error_event.channel;
|
|
status = msg->u.error_event.status;
|
|
txerr = msg->u.error_event.tx_errors_count;
|
|
rxerr = msg->u.error_event.rx_errors_count;
|
|
error_factor = msg->u.error_event.error_factor;
|
|
break;
|
|
case CMD_LOG_MESSAGE:
|
|
channel = msg->u.log_message.channel;
|
|
status = msg->u.log_message.data[0];
|
|
txerr = msg->u.log_message.data[2];
|
|
rxerr = msg->u.log_message.data[3];
|
|
error_factor = msg->u.log_message.data[1];
|
|
break;
|
|
case CMD_CHIP_STATE_EVENT:
|
|
channel = msg->u.chip_state_event.channel;
|
|
status = msg->u.chip_state_event.status;
|
|
txerr = msg->u.chip_state_event.tx_errors_count;
|
|
rxerr = msg->u.chip_state_event.rx_errors_count;
|
|
error_factor = 0;
|
|
break;
|
|
default:
|
|
dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n",
|
|
msg->id);
|
|
return;
|
|
}
|
|
|
|
if (channel >= dev->nchannels) {
|
|
dev_err(dev->udev->dev.parent,
|
|
"Invalid channel number (%d)\n", channel);
|
|
return;
|
|
}
|
|
|
|
priv = dev->nets[channel];
|
|
stats = &priv->netdev->stats;
|
|
|
|
if (status & M16C_STATE_BUS_RESET) {
|
|
kvaser_usb_unlink_tx_urbs(priv);
|
|
return;
|
|
}
|
|
|
|
skb = alloc_can_err_skb(priv->netdev, &cf);
|
|
if (!skb) {
|
|
stats->rx_dropped++;
|
|
return;
|
|
}
|
|
|
|
new_state = priv->can.state;
|
|
|
|
netdev_dbg(priv->netdev, "Error status: 0x%02x\n", status);
|
|
|
|
if (status & M16C_STATE_BUS_OFF) {
|
|
cf->can_id |= CAN_ERR_BUSOFF;
|
|
|
|
priv->can.can_stats.bus_off++;
|
|
if (!priv->can.restart_ms)
|
|
kvaser_usb_simple_msg_async(priv, CMD_STOP_CHIP);
|
|
|
|
netif_carrier_off(priv->netdev);
|
|
|
|
new_state = CAN_STATE_BUS_OFF;
|
|
} else if (status & M16C_STATE_BUS_PASSIVE) {
|
|
if (priv->can.state != CAN_STATE_ERROR_PASSIVE) {
|
|
cf->can_id |= CAN_ERR_CRTL;
|
|
|
|
if (txerr || rxerr)
|
|
cf->data[1] = (txerr > rxerr)
|
|
? CAN_ERR_CRTL_TX_PASSIVE
|
|
: CAN_ERR_CRTL_RX_PASSIVE;
|
|
else
|
|
cf->data[1] = CAN_ERR_CRTL_TX_PASSIVE |
|
|
CAN_ERR_CRTL_RX_PASSIVE;
|
|
|
|
priv->can.can_stats.error_passive++;
|
|
}
|
|
|
|
new_state = CAN_STATE_ERROR_PASSIVE;
|
|
}
|
|
|
|
if (status == M16C_STATE_BUS_ERROR) {
|
|
if ((priv->can.state < CAN_STATE_ERROR_WARNING) &&
|
|
((txerr >= 96) || (rxerr >= 96))) {
|
|
cf->can_id |= CAN_ERR_CRTL;
|
|
cf->data[1] = (txerr > rxerr)
|
|
? CAN_ERR_CRTL_TX_WARNING
|
|
: CAN_ERR_CRTL_RX_WARNING;
|
|
|
|
priv->can.can_stats.error_warning++;
|
|
new_state = CAN_STATE_ERROR_WARNING;
|
|
} else if (priv->can.state > CAN_STATE_ERROR_ACTIVE) {
|
|
cf->can_id |= CAN_ERR_PROT;
|
|
cf->data[2] = CAN_ERR_PROT_ACTIVE;
|
|
|
|
new_state = CAN_STATE_ERROR_ACTIVE;
|
|
}
|
|
}
|
|
|
|
if (!status) {
|
|
cf->can_id |= CAN_ERR_PROT;
|
|
cf->data[2] = CAN_ERR_PROT_ACTIVE;
|
|
|
|
new_state = CAN_STATE_ERROR_ACTIVE;
|
|
}
|
|
|
|
if (priv->can.restart_ms &&
|
|
(priv->can.state >= CAN_STATE_BUS_OFF) &&
|
|
(new_state < CAN_STATE_BUS_OFF)) {
|
|
cf->can_id |= CAN_ERR_RESTARTED;
|
|
netif_carrier_on(priv->netdev);
|
|
|
|
priv->can.can_stats.restarts++;
|
|
}
|
|
|
|
if (error_factor) {
|
|
priv->can.can_stats.bus_error++;
|
|
stats->rx_errors++;
|
|
|
|
cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT;
|
|
|
|
if (error_factor & M16C_EF_ACKE)
|
|
cf->data[3] |= (CAN_ERR_PROT_LOC_ACK);
|
|
if (error_factor & M16C_EF_CRCE)
|
|
cf->data[3] |= (CAN_ERR_PROT_LOC_CRC_SEQ |
|
|
CAN_ERR_PROT_LOC_CRC_DEL);
|
|
if (error_factor & M16C_EF_FORME)
|
|
cf->data[2] |= CAN_ERR_PROT_FORM;
|
|
if (error_factor & M16C_EF_STFE)
|
|
cf->data[2] |= CAN_ERR_PROT_STUFF;
|
|
if (error_factor & M16C_EF_BITE0)
|
|
cf->data[2] |= CAN_ERR_PROT_BIT0;
|
|
if (error_factor & M16C_EF_BITE1)
|
|
cf->data[2] |= CAN_ERR_PROT_BIT1;
|
|
if (error_factor & M16C_EF_TRE)
|
|
cf->data[2] |= CAN_ERR_PROT_TX;
|
|
}
|
|
|
|
cf->data[6] = txerr;
|
|
cf->data[7] = rxerr;
|
|
|
|
priv->bec.txerr = txerr;
|
|
priv->bec.rxerr = rxerr;
|
|
|
|
priv->can.state = new_state;
|
|
|
|
netif_rx(skb);
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += cf->can_dlc;
|
|
}
|
|
|
|
static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
struct can_frame *cf;
|
|
struct sk_buff *skb;
|
|
struct net_device_stats *stats = &priv->netdev->stats;
|
|
|
|
if (msg->u.rx_can.flag & (MSG_FLAG_ERROR_FRAME |
|
|
MSG_FLAG_NERR)) {
|
|
netdev_err(priv->netdev, "Unknow error (flags: 0x%02x)\n",
|
|
msg->u.rx_can.flag);
|
|
|
|
stats->rx_errors++;
|
|
return;
|
|
}
|
|
|
|
if (msg->u.rx_can.flag & MSG_FLAG_OVERRUN) {
|
|
skb = alloc_can_err_skb(priv->netdev, &cf);
|
|
if (!skb) {
|
|
stats->rx_dropped++;
|
|
return;
|
|
}
|
|
|
|
cf->can_id |= CAN_ERR_CRTL;
|
|
cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
|
|
|
|
stats->rx_over_errors++;
|
|
stats->rx_errors++;
|
|
|
|
netif_rx(skb);
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += cf->can_dlc;
|
|
}
|
|
}
|
|
|
|
static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
struct kvaser_usb_net_priv *priv;
|
|
struct can_frame *cf;
|
|
struct sk_buff *skb;
|
|
struct net_device_stats *stats;
|
|
u8 channel = msg->u.rx_can.channel;
|
|
|
|
if (channel >= dev->nchannels) {
|
|
dev_err(dev->udev->dev.parent,
|
|
"Invalid channel number (%d)\n", channel);
|
|
return;
|
|
}
|
|
|
|
priv = dev->nets[channel];
|
|
stats = &priv->netdev->stats;
|
|
|
|
if ((msg->u.rx_can.flag & MSG_FLAG_ERROR_FRAME) &&
|
|
(msg->id == CMD_LOG_MESSAGE)) {
|
|
kvaser_usb_rx_error(dev, msg);
|
|
return;
|
|
} else if (msg->u.rx_can.flag & (MSG_FLAG_ERROR_FRAME |
|
|
MSG_FLAG_NERR |
|
|
MSG_FLAG_OVERRUN)) {
|
|
kvaser_usb_rx_can_err(priv, msg);
|
|
return;
|
|
} else if (msg->u.rx_can.flag & ~MSG_FLAG_REMOTE_FRAME) {
|
|
netdev_warn(priv->netdev,
|
|
"Unhandled frame (flags: 0x%02x)",
|
|
msg->u.rx_can.flag);
|
|
return;
|
|
}
|
|
|
|
skb = alloc_can_skb(priv->netdev, &cf);
|
|
if (!skb) {
|
|
stats->tx_dropped++;
|
|
return;
|
|
}
|
|
|
|
if (msg->id == CMD_LOG_MESSAGE) {
|
|
cf->can_id = le32_to_cpu(msg->u.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(msg->u.log_message.dlc);
|
|
|
|
if (msg->u.log_message.flags & MSG_FLAG_REMOTE_FRAME)
|
|
cf->can_id |= CAN_RTR_FLAG;
|
|
else
|
|
memcpy(cf->data, &msg->u.log_message.data,
|
|
cf->can_dlc);
|
|
} else {
|
|
cf->can_id = ((msg->u.rx_can.msg[0] & 0x1f) << 6) |
|
|
(msg->u.rx_can.msg[1] & 0x3f);
|
|
|
|
if (msg->id == CMD_RX_EXT_MESSAGE) {
|
|
cf->can_id <<= 18;
|
|
cf->can_id |= ((msg->u.rx_can.msg[2] & 0x0f) << 14) |
|
|
((msg->u.rx_can.msg[3] & 0xff) << 6) |
|
|
(msg->u.rx_can.msg[4] & 0x3f);
|
|
cf->can_id |= CAN_EFF_FLAG;
|
|
}
|
|
|
|
cf->can_dlc = get_can_dlc(msg->u.rx_can.msg[5]);
|
|
|
|
if (msg->u.rx_can.flag & MSG_FLAG_REMOTE_FRAME)
|
|
cf->can_id |= CAN_RTR_FLAG;
|
|
else
|
|
memcpy(cf->data, &msg->u.rx_can.msg[6],
|
|
cf->can_dlc);
|
|
}
|
|
|
|
netif_rx(skb);
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += cf->can_dlc;
|
|
}
|
|
|
|
static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
struct kvaser_usb_net_priv *priv;
|
|
u8 channel = msg->u.simple.channel;
|
|
|
|
if (channel >= dev->nchannels) {
|
|
dev_err(dev->udev->dev.parent,
|
|
"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_stop_chip_reply(const struct kvaser_usb *dev,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
struct kvaser_usb_net_priv *priv;
|
|
u8 channel = msg->u.simple.channel;
|
|
|
|
if (channel >= dev->nchannels) {
|
|
dev_err(dev->udev->dev.parent,
|
|
"Invalid channel number (%d)\n", channel);
|
|
return;
|
|
}
|
|
|
|
priv = dev->nets[channel];
|
|
|
|
complete(&priv->stop_comp);
|
|
}
|
|
|
|
static void kvaser_usb_handle_message(const struct kvaser_usb *dev,
|
|
const struct kvaser_msg *msg)
|
|
{
|
|
switch (msg->id) {
|
|
case CMD_START_CHIP_REPLY:
|
|
kvaser_usb_start_chip_reply(dev, msg);
|
|
break;
|
|
|
|
case CMD_STOP_CHIP_REPLY:
|
|
kvaser_usb_stop_chip_reply(dev, msg);
|
|
break;
|
|
|
|
case CMD_RX_STD_MESSAGE:
|
|
case CMD_RX_EXT_MESSAGE:
|
|
case CMD_LOG_MESSAGE:
|
|
kvaser_usb_rx_can_msg(dev, msg);
|
|
break;
|
|
|
|
case CMD_CHIP_STATE_EVENT:
|
|
case CMD_CAN_ERROR_EVENT:
|
|
kvaser_usb_rx_error(dev, msg);
|
|
break;
|
|
|
|
case CMD_TX_ACKNOWLEDGE:
|
|
kvaser_usb_tx_acknowledge(dev, msg);
|
|
break;
|
|
|
|
default:
|
|
dev_warn(dev->udev->dev.parent,
|
|
"Unhandled message (%d)\n", msg->id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void kvaser_usb_read_bulk_callback(struct urb *urb)
|
|
{
|
|
struct kvaser_usb *dev = urb->context;
|
|
struct kvaser_msg *msg;
|
|
int pos = 0;
|
|
int err, i;
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
break;
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
return;
|
|
default:
|
|
dev_info(dev->udev->dev.parent, "Rx URB aborted (%d)\n",
|
|
urb->status);
|
|
goto resubmit_urb;
|
|
}
|
|
|
|
while (pos <= urb->actual_length - MSG_HEADER_LEN) {
|
|
msg = urb->transfer_buffer + pos;
|
|
|
|
if (!msg->len)
|
|
break;
|
|
|
|
if (pos + msg->len > urb->actual_length) {
|
|
dev_err(dev->udev->dev.parent, "Format error\n");
|
|
break;
|
|
}
|
|
|
|
kvaser_usb_handle_message(dev, msg);
|
|
|
|
pos += msg->len;
|
|
}
|
|
|
|
resubmit_urb:
|
|
usb_fill_bulk_urb(urb, dev->udev,
|
|
usb_rcvbulkpipe(dev->udev,
|
|
dev->bulk_in->bEndpointAddress),
|
|
urb->transfer_buffer, RX_BUFFER_SIZE,
|
|
kvaser_usb_read_bulk_callback, dev);
|
|
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (err == -ENODEV) {
|
|
for (i = 0; i < dev->nchannels; i++) {
|
|
if (!dev->nets[i])
|
|
continue;
|
|
|
|
netif_device_detach(dev->nets[i]->netdev);
|
|
}
|
|
} else if (err) {
|
|
dev_err(dev->udev->dev.parent,
|
|
"Failed resubmitting read bulk urb: %d\n", err);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
|
|
{
|
|
int i, err = 0;
|
|
|
|
if (dev->rxinitdone)
|
|
return 0;
|
|
|
|
for (i = 0; i < MAX_RX_URBS; i++) {
|
|
struct urb *urb = NULL;
|
|
u8 *buf = NULL;
|
|
dma_addr_t buf_dma;
|
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!urb) {
|
|
dev_warn(dev->udev->dev.parent,
|
|
"No memory left for URBs\n");
|
|
err = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE,
|
|
GFP_KERNEL, &buf_dma);
|
|
if (!buf) {
|
|
dev_warn(dev->udev->dev.parent,
|
|
"No memory left for USB buffer\n");
|
|
usb_free_urb(urb);
|
|
err = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
usb_fill_bulk_urb(urb, dev->udev,
|
|
usb_rcvbulkpipe(dev->udev,
|
|
dev->bulk_in->bEndpointAddress),
|
|
buf, RX_BUFFER_SIZE,
|
|
kvaser_usb_read_bulk_callback,
|
|
dev);
|
|
urb->transfer_dma = buf_dma;
|
|
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
usb_anchor_urb(urb, &dev->rx_submitted);
|
|
|
|
err = usb_submit_urb(urb, GFP_KERNEL);
|
|
if (err) {
|
|
usb_unanchor_urb(urb);
|
|
usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf,
|
|
buf_dma);
|
|
usb_free_urb(urb);
|
|
break;
|
|
}
|
|
|
|
dev->rxbuf[i] = buf;
|
|
dev->rxbuf_dma[i] = buf_dma;
|
|
|
|
usb_free_urb(urb);
|
|
}
|
|
|
|
if (i == 0) {
|
|
dev_warn(dev->udev->dev.parent,
|
|
"Cannot setup read URBs, error %d\n", err);
|
|
return err;
|
|
} else if (i < MAX_RX_URBS) {
|
|
dev_warn(dev->udev->dev.parent,
|
|
"RX performances may be slow\n");
|
|
}
|
|
|
|
dev->rxinitdone = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv *priv)
|
|
{
|
|
struct kvaser_msg *msg;
|
|
int rc;
|
|
|
|
msg = kmalloc(sizeof(*msg), GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->id = CMD_SET_CTRL_MODE;
|
|
msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_ctrl_mode);
|
|
msg->u.ctrl_mode.tid = 0xff;
|
|
msg->u.ctrl_mode.channel = priv->channel;
|
|
|
|
if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
|
|
msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
|
|
else
|
|
msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
|
|
|
|
rc = kvaser_usb_send_msg(priv->dev, msg);
|
|
|
|
kfree(msg);
|
|
return rc;
|
|
}
|
|
|
|
static int kvaser_usb_start_chip(struct kvaser_usb_net_priv *priv)
|
|
{
|
|
int err;
|
|
|
|
init_completion(&priv->start_comp);
|
|
|
|
err = kvaser_usb_send_simple_msg(priv->dev, CMD_START_CHIP,
|
|
priv->channel);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!wait_for_completion_timeout(&priv->start_comp,
|
|
msecs_to_jiffies(START_TIMEOUT)))
|
|
return -ETIMEDOUT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvaser_usb_open(struct net_device *netdev)
|
|
{
|
|
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
|
|
struct kvaser_usb *dev = priv->dev;
|
|
int err;
|
|
|
|
err = open_candev(netdev);
|
|
if (err)
|
|
return err;
|
|
|
|
err = kvaser_usb_setup_rx_urbs(dev);
|
|
if (err)
|
|
goto error;
|
|
|
|
err = kvaser_usb_set_opt_mode(priv);
|
|
if (err)
|
|
goto error;
|
|
|
|
err = kvaser_usb_start_chip(priv);
|
|
if (err) {
|
|
netdev_warn(netdev, "Cannot start device, error %d\n", err);
|
|
goto error;
|
|
}
|
|
|
|
priv->can.state = CAN_STATE_ERROR_ACTIVE;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
close_candev(netdev);
|
|
return err;
|
|
}
|
|
|
|
static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
|
|
{
|
|
int i;
|
|
|
|
usb_kill_anchored_urbs(&dev->rx_submitted);
|
|
|
|
for (i = 0; i < MAX_RX_URBS; i++)
|
|
usb_free_coherent(dev->udev, RX_BUFFER_SIZE,
|
|
dev->rxbuf[i],
|
|
dev->rxbuf_dma[i]);
|
|
|
|
for (i = 0; i < MAX_NET_DEVICES; i++) {
|
|
struct kvaser_usb_net_priv *priv = dev->nets[i];
|
|
|
|
if (priv)
|
|
kvaser_usb_unlink_tx_urbs(priv);
|
|
}
|
|
}
|
|
|
|
static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv *priv)
|
|
{
|
|
int err;
|
|
|
|
init_completion(&priv->stop_comp);
|
|
|
|
err = kvaser_usb_send_simple_msg(priv->dev, CMD_STOP_CHIP,
|
|
priv->channel);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!wait_for_completion_timeout(&priv->stop_comp,
|
|
msecs_to_jiffies(STOP_TIMEOUT)))
|
|
return -ETIMEDOUT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv *priv)
|
|
{
|
|
struct kvaser_msg *msg;
|
|
int rc;
|
|
|
|
msg = kmalloc(sizeof(*msg), GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->id = CMD_FLUSH_QUEUE;
|
|
msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_flush_queue);
|
|
msg->u.flush_queue.channel = priv->channel;
|
|
msg->u.flush_queue.flags = 0x00;
|
|
|
|
rc = kvaser_usb_send_msg(priv->dev, msg);
|
|
|
|
kfree(msg);
|
|
return rc;
|
|
}
|
|
|
|
static int kvaser_usb_close(struct net_device *netdev)
|
|
{
|
|
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
|
|
struct kvaser_usb *dev = priv->dev;
|
|
int err;
|
|
|
|
netif_stop_queue(netdev);
|
|
|
|
err = kvaser_usb_flush_queue(priv);
|
|
if (err)
|
|
netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
|
|
|
|
if (kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, priv->channel))
|
|
netdev_warn(netdev, "Cannot reset card, error %d\n", err);
|
|
|
|
err = kvaser_usb_stop_chip(priv);
|
|
if (err)
|
|
netdev_warn(netdev, "Cannot stop device, error %d\n", err);
|
|
|
|
priv->can.state = CAN_STATE_STOPPED;
|
|
close_candev(priv->netdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvaser_usb_write_bulk_callback(struct urb *urb)
|
|
{
|
|
struct kvaser_usb_tx_urb_context *context = urb->context;
|
|
struct kvaser_usb_net_priv *priv;
|
|
struct net_device *netdev;
|
|
|
|
if (WARN_ON(!context))
|
|
return;
|
|
|
|
priv = context->priv;
|
|
netdev = priv->netdev;
|
|
|
|
kfree(urb->transfer_buffer);
|
|
|
|
if (!netif_device_present(netdev))
|
|
return;
|
|
|
|
if (urb->status)
|
|
netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
|
|
}
|
|
|
|
static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
|
|
struct net_device *netdev)
|
|
{
|
|
struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
|
|
struct kvaser_usb *dev = priv->dev;
|
|
struct net_device_stats *stats = &netdev->stats;
|
|
struct can_frame *cf = (struct can_frame *)skb->data;
|
|
struct kvaser_usb_tx_urb_context *context = NULL;
|
|
struct urb *urb;
|
|
void *buf;
|
|
struct kvaser_msg *msg;
|
|
int i, err;
|
|
int ret = NETDEV_TX_OK;
|
|
|
|
if (can_dropped_invalid_skb(netdev, skb))
|
|
return NETDEV_TX_OK;
|
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
|
if (!urb) {
|
|
netdev_err(netdev, "No memory left for URBs\n");
|
|
stats->tx_dropped++;
|
|
goto nourbmem;
|
|
}
|
|
|
|
buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC);
|
|
if (!buf) {
|
|
stats->tx_dropped++;
|
|
goto nobufmem;
|
|
}
|
|
|
|
msg = buf;
|
|
msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_tx_can);
|
|
msg->u.tx_can.flags = 0;
|
|
msg->u.tx_can.channel = priv->channel;
|
|
|
|
if (cf->can_id & CAN_EFF_FLAG) {
|
|
msg->id = CMD_TX_EXT_MESSAGE;
|
|
msg->u.tx_can.msg[0] = (cf->can_id >> 24) & 0x1f;
|
|
msg->u.tx_can.msg[1] = (cf->can_id >> 18) & 0x3f;
|
|
msg->u.tx_can.msg[2] = (cf->can_id >> 14) & 0x0f;
|
|
msg->u.tx_can.msg[3] = (cf->can_id >> 6) & 0xff;
|
|
msg->u.tx_can.msg[4] = cf->can_id & 0x3f;
|
|
} else {
|
|
msg->id = CMD_TX_STD_MESSAGE;
|
|
msg->u.tx_can.msg[0] = (cf->can_id >> 6) & 0x1f;
|
|
msg->u.tx_can.msg[1] = cf->can_id & 0x3f;
|
|
}
|
|
|
|
msg->u.tx_can.msg[5] = cf->can_dlc;
|
|
memcpy(&msg->u.tx_can.msg[6], cf->data, cf->can_dlc);
|
|
|
|
if (cf->can_id & CAN_RTR_FLAG)
|
|
msg->u.tx_can.flags |= MSG_FLAG_REMOTE_FRAME;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++) {
|
|
if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) {
|
|
context = &priv->tx_contexts[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!context) {
|
|
netdev_warn(netdev, "cannot find free context\n");
|
|
ret = NETDEV_TX_BUSY;
|
|
goto releasebuf;
|
|
}
|
|
|
|
context->priv = priv;
|
|
context->echo_index = i;
|
|
context->dlc = cf->can_dlc;
|
|
|
|
msg->u.tx_can.tid = context->echo_index;
|
|
|
|
usb_fill_bulk_urb(urb, dev->udev,
|
|
usb_sndbulkpipe(dev->udev,
|
|
dev->bulk_out->bEndpointAddress),
|
|
buf, msg->len,
|
|
kvaser_usb_write_bulk_callback, context);
|
|
usb_anchor_urb(urb, &priv->tx_submitted);
|
|
|
|
can_put_echo_skb(skb, netdev, context->echo_index);
|
|
|
|
atomic_inc(&priv->active_tx_urbs);
|
|
|
|
if (atomic_read(&priv->active_tx_urbs) >= MAX_TX_URBS)
|
|
netif_stop_queue(netdev);
|
|
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (unlikely(err)) {
|
|
can_free_echo_skb(netdev, context->echo_index);
|
|
|
|
skb = NULL; /* set to NULL to avoid double free in
|
|
* dev_kfree_skb(skb) */
|
|
|
|
atomic_dec(&priv->active_tx_urbs);
|
|
usb_unanchor_urb(urb);
|
|
|
|
stats->tx_dropped++;
|
|
|
|
if (err == -ENODEV)
|
|
netif_device_detach(netdev);
|
|
else
|
|
netdev_warn(netdev, "Failed tx_urb %d\n", err);
|
|
|
|
goto releasebuf;
|
|
}
|
|
|
|
usb_free_urb(urb);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
releasebuf:
|
|
kfree(buf);
|
|
nobufmem:
|
|
usb_free_urb(urb);
|
|
nourbmem:
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
static const struct net_device_ops kvaser_usb_netdev_ops = {
|
|
.ndo_open = kvaser_usb_open,
|
|
.ndo_stop = kvaser_usb_close,
|
|
.ndo_start_xmit = kvaser_usb_start_xmit,
|
|
};
|
|
|
|
static const struct can_bittiming_const kvaser_usb_bittiming_const = {
|
|
.name = "kvaser_usb",
|
|
.tseg1_min = KVASER_USB_TSEG1_MIN,
|
|
.tseg1_max = KVASER_USB_TSEG1_MAX,
|
|
.tseg2_min = KVASER_USB_TSEG2_MIN,
|
|
.tseg2_max = KVASER_USB_TSEG2_MAX,
|
|
.sjw_max = KVASER_USB_SJW_MAX,
|
|
.brp_min = KVASER_USB_BRP_MIN,
|
|
.brp_max = KVASER_USB_BRP_MAX,
|
|
.brp_inc = KVASER_USB_BRP_INC,
|
|
};
|
|
|
|
static int kvaser_usb_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_msg *msg;
|
|
int rc;
|
|
|
|
msg = kmalloc(sizeof(*msg), GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->id = CMD_SET_BUS_PARAMS;
|
|
msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_busparams);
|
|
msg->u.busparams.channel = priv->channel;
|
|
msg->u.busparams.tid = 0xff;
|
|
msg->u.busparams.bitrate = cpu_to_le32(bt->bitrate);
|
|
msg->u.busparams.sjw = bt->sjw;
|
|
msg->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1;
|
|
msg->u.busparams.tseg2 = bt->phase_seg2;
|
|
|
|
if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
|
|
msg->u.busparams.no_samp = 3;
|
|
else
|
|
msg->u.busparams.no_samp = 1;
|
|
|
|
rc = kvaser_usb_send_msg(dev, msg);
|
|
|
|
kfree(msg);
|
|
return rc;
|
|
}
|
|
|
|
static int kvaser_usb_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:
|
|
err = kvaser_usb_simple_msg_async(priv, CMD_START_CHIP);
|
|
if (err)
|
|
return err;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvaser_usb_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 void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < dev->nchannels; i++) {
|
|
if (!dev->nets[i])
|
|
continue;
|
|
|
|
unregister_netdev(dev->nets[i]->netdev);
|
|
}
|
|
|
|
kvaser_usb_unlink_all_urbs(dev);
|
|
|
|
for (i = 0; i < dev->nchannels; i++) {
|
|
if (!dev->nets[i])
|
|
continue;
|
|
|
|
free_candev(dev->nets[i]->netdev);
|
|
}
|
|
}
|
|
|
|
static int kvaser_usb_init_one(struct usb_interface *intf,
|
|
const struct usb_device_id *id, int channel)
|
|
{
|
|
struct kvaser_usb *dev = usb_get_intfdata(intf);
|
|
struct net_device *netdev;
|
|
struct kvaser_usb_net_priv *priv;
|
|
int i, err;
|
|
|
|
netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS);
|
|
if (!netdev) {
|
|
dev_err(&intf->dev, "Cannot alloc candev\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv = netdev_priv(netdev);
|
|
|
|
init_completion(&priv->start_comp);
|
|
init_completion(&priv->stop_comp);
|
|
|
|
init_usb_anchor(&priv->tx_submitted);
|
|
atomic_set(&priv->active_tx_urbs, 0);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++)
|
|
priv->tx_contexts[i].echo_index = MAX_TX_URBS;
|
|
|
|
priv->dev = dev;
|
|
priv->netdev = netdev;
|
|
priv->channel = channel;
|
|
|
|
priv->can.state = CAN_STATE_STOPPED;
|
|
priv->can.clock.freq = CAN_USB_CLOCK;
|
|
priv->can.bittiming_const = &kvaser_usb_bittiming_const;
|
|
priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
|
|
priv->can.do_set_mode = kvaser_usb_set_mode;
|
|
if (id->driver_info & KVASER_HAS_TXRX_ERRORS)
|
|
priv->can.do_get_berr_counter = kvaser_usb_get_berr_counter;
|
|
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
|
|
if (id->driver_info & KVASER_HAS_SILENT_MODE)
|
|
priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
|
|
|
|
netdev->flags |= IFF_ECHO;
|
|
|
|
netdev->netdev_ops = &kvaser_usb_netdev_ops;
|
|
|
|
SET_NETDEV_DEV(netdev, &intf->dev);
|
|
|
|
dev->nets[channel] = priv;
|
|
|
|
err = register_candev(netdev);
|
|
if (err) {
|
|
dev_err(&intf->dev, "Failed to register can device\n");
|
|
free_candev(netdev);
|
|
dev->nets[channel] = NULL;
|
|
return err;
|
|
}
|
|
|
|
netdev_dbg(netdev, "device registered\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvaser_usb_get_endpoints(const struct usb_interface *intf,
|
|
struct usb_endpoint_descriptor **in,
|
|
struct usb_endpoint_descriptor **out)
|
|
{
|
|
const struct usb_host_interface *iface_desc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
int i;
|
|
|
|
iface_desc = &intf->altsetting[0];
|
|
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
|
|
if (usb_endpoint_is_bulk_in(endpoint))
|
|
*in = endpoint;
|
|
|
|
if (usb_endpoint_is_bulk_out(endpoint))
|
|
*out = endpoint;
|
|
}
|
|
}
|
|
|
|
static int kvaser_usb_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct kvaser_usb *dev;
|
|
int err = -ENOMEM;
|
|
int i;
|
|
|
|
dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out);
|
|
if (!dev->bulk_in || !dev->bulk_out) {
|
|
dev_err(&intf->dev, "Cannot get usb endpoint(s)");
|
|
return err;
|
|
}
|
|
|
|
dev->udev = interface_to_usbdev(intf);
|
|
|
|
init_usb_anchor(&dev->rx_submitted);
|
|
|
|
usb_set_intfdata(intf, dev);
|
|
|
|
for (i = 0; i < MAX_NET_DEVICES; i++)
|
|
kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, i);
|
|
|
|
err = kvaser_usb_get_software_info(dev);
|
|
if (err) {
|
|
dev_err(&intf->dev,
|
|
"Cannot get software infos, error %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = kvaser_usb_get_card_info(dev);
|
|
if (err) {
|
|
dev_err(&intf->dev,
|
|
"Cannot get card infos, error %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
|
|
((dev->fw_version >> 24) & 0xff),
|
|
((dev->fw_version >> 16) & 0xff),
|
|
(dev->fw_version & 0xffff));
|
|
|
|
for (i = 0; i < dev->nchannels; i++) {
|
|
err = kvaser_usb_init_one(intf, id, i);
|
|
if (err) {
|
|
kvaser_usb_remove_interfaces(dev);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvaser_usb_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct kvaser_usb *dev = usb_get_intfdata(intf);
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
|
|
if (!dev)
|
|
return;
|
|
|
|
kvaser_usb_remove_interfaces(dev);
|
|
}
|
|
|
|
static struct usb_driver kvaser_usb_driver = {
|
|
.name = "kvaser_usb",
|
|
.probe = kvaser_usb_probe,
|
|
.disconnect = kvaser_usb_disconnect,
|
|
.id_table = kvaser_usb_table,
|
|
};
|
|
|
|
module_usb_driver(kvaser_usb_driver);
|
|
|
|
MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
|
|
MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
|
|
MODULE_LICENSE("GPL v2");
|