path: root/drivers/net/can/usb/peak_usb/pcan_usb_fd.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
 *
 * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
 */
#include <linux/ethtool.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/usb.h>

#include <linux/can.h>
#include <linux/can/dev.h>
#include <linux/can/error.h>
#include <linux/can/dev/peak_canfd.h>

#include "pcan_usb_core.h"
#include "pcan_usb_pro.h"

#define PCAN_USBPROFD_CHANNEL_COUNT	2
#define PCAN_USBFD_CHANNEL_COUNT	1

/* PCAN-USB Pro FD adapter internal clock (Hz) */
#define PCAN_UFD_CRYSTAL_HZ		80000000

#define PCAN_UFD_CMD_BUFFER_SIZE	512
#define PCAN_UFD_LOSPD_PKT_SIZE		64

/* PCAN-USB Pro FD command timeout (ms.) */
#define PCAN_UFD_CMD_TIMEOUT_MS		1000

/* PCAN-USB Pro FD rx/tx buffers size */
#define PCAN_UFD_RX_BUFFER_SIZE		2048
#define PCAN_UFD_TX_BUFFER_SIZE		512

/* struct pcan_ufd_fw_info::type */
#define PCAN_USBFD_TYPE_STD		1
#define PCAN_USBFD_TYPE_EXT		2	/* includes EP numbers */

/* read some versions info from the hw device */
struct __packed pcan_ufd_fw_info {
	__le16	size_of;	/* sizeof this */
	__le16	type;		/* type of this structure */
	u8	hw_type;	/* Type of hardware (HW_TYPE_xxx) */
	u8	bl_version[3];	/* Bootloader version */
	u8	hw_version;	/* Hardware version (PCB) */
	u8	fw_version[3];	/* Firmware version */
	__le32	dev_id[2];	/* "device id" per CAN */
	__le32	ser_no;		/* S/N */
	__le32	flags;		/* special functions */

	/* extended data when type == PCAN_USBFD_TYPE_EXT */
	u8	cmd_out_ep;	/* ep for cmd */
	u8	cmd_in_ep;	/* ep for replies */
	u8	data_out_ep[2];	/* ep for CANx TX */
	u8	data_in_ep;	/* ep for CAN RX */
	u8	dummy[3];
};

/* handle device specific info used by the netdevices */
struct pcan_usb_fd_if {
	struct peak_usb_device	*dev[PCAN_USB_MAX_CHANNEL];
	struct pcan_ufd_fw_info	fw_info;
	struct peak_time_ref	time_ref;
	int			cm_ignore_count;
	int			dev_opened_count;
};

/* device information */
struct pcan_usb_fd_device {
	struct peak_usb_device	dev;
	struct can_berr_counter	bec;
	struct pcan_usb_fd_if	*usb_if;
	u8			*cmd_buffer_addr;
};

/* Extended USB commands (non uCAN commands) */

/* Clock Modes command */
#define PCAN_UFD_CMD_CLK_SET		0x80

#define PCAN_UFD_CLK_80MHZ		0x0
#define PCAN_UFD_CLK_60MHZ		0x1