// SPDX-License-Identifier: GPL-2.0-only
/* CAN driver for Geschwister Schneider USB/CAN devices
* and bytewerk.org candleLight USB CAN interfaces.
*
* Copyright (C) 2013-2016 Geschwister Schneider Technologie-,
* Entwicklungs- und Vertriebs UG (Haftungsbeschränkt).
* Copyright (C) 2016 Hubert Denkmair
*
* Many thanks to all socketcan devs!
*/
#include <linux/bitfield.h>
#include <linux/clocksource.h>
#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/signal.h>
#include <linux/timecounter.h>
#include <linux/units.h>
#include <linux/usb.h>
#include <linux/workqueue.h>
#include <linux/can.h>
#include <linux/can/dev.h>
#include <linux/can/error.h>
/* Device specific constants */
#define USB_GS_USB_1_VENDOR_ID 0x1d50
#define USB_GS_USB_1_PRODUCT_ID 0x606f
#define USB_CANDLELIGHT_VENDOR_ID 0x1209
#define USB_CANDLELIGHT_PRODUCT_ID 0x2323
#define USB_CES_CANEXT_FD_VENDOR_ID 0x1cd2
#define USB_CES_CANEXT_FD_PRODUCT_ID 0x606f
#define USB_ABE_CANDEBUGGER_FD_VENDOR_ID 0x16d0
#define USB_ABE_CANDEBUGGER_FD_PRODUCT_ID 0x10b8
#define GS_USB_ENDPOINT_IN 1
#define GS_USB_ENDPOINT_OUT 2
/* Timestamp 32 bit timer runs at 1 MHz (1 µs tick). Worker accounts
* for timer overflow (will be after ~71 minutes)
*/
#define GS_USB_TIMESTAMP_TIMER_HZ (1 * HZ_PER_MHZ)
#define GS_USB_TIMESTAMP_WORK_DELAY_SEC 1800
static_assert(GS_USB_TIMESTAMP_WORK_DELAY_SEC <
CYCLECOUNTER_MASK(32) / GS_USB_TIMESTAMP_TIMER_HZ / 2);
/* Device specific constants */
enum gs_usb_breq {
GS_USB_BREQ_HOST_FORMAT = 0,
GS_USB_BREQ_BITTIMING,
GS_USB_BREQ_MODE,
GS_USB_BREQ_BERR,
GS_USB_BREQ_BT_CONST,
GS_USB_BREQ_DEVICE_CONFIG,
GS_USB_BREQ_TIMESTAMP,
GS_USB_BREQ_IDENTIFY,
GS_USB_BREQ_GET_USER_ID,
GS_USB_BREQ_QUIRK_CANTACT_PRO_DATA_BITTIMING = GS_USB_BREQ_GET_USER_ID,
GS_USB_BREQ_SET_USER_ID,
GS_USB_BREQ_DATA_BITTIMING,
GS_USB_BREQ_BT_CONST_EXT,
GS_USB_BREQ_SET_TERMINATION,
GS_USB_BREQ_GET_TERMINATION,
};
enum gs_can_mode {
/* reset a channel. turns it off */
GS_CAN_MOD