#pragma once

#define u32 uint32_t
#define u8 uint8_t

#define GSUSB_ENDPOINT_IN          0x81
#define GSUSB_ENDPOINT_OUT         0x02


#define GS_CAN_MODE_NORMAL               0
#define GS_CAN_MODE_LISTEN_ONLY          (1<<0)
#define GS_CAN_MODE_LOOP_BACK            (1<<1)
#define GS_CAN_MODE_TRIPLE_SAMPLE        (1<<2)
#define GS_CAN_MODE_ONE_SHOT             (1<<3)
#define GS_CAN_FEATURE_LISTEN_ONLY      (1<<0)
#define GS_CAN_FEATURE_LOOP_BACK        (1<<1)
#define GS_CAN_FEATURE_TRIPLE_SAMPLE    (1<<2)
#define GS_CAN_FEATURE_ONE_SHOT         (1<<3)
#define GS_CAN_FLAG_OVERFLOW 1

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
};

enum gs_can_mode {
	/* reset a channel. turns it off */
	GS_CAN_MODE_RESET = 0,
	/* starts a channel */
	GS_CAN_MODE_START
};

enum gs_can_state {
	GS_CAN_STATE_ERROR_ACTIVE = 0,
	GS_CAN_STATE_ERROR_WARNING,
	GS_CAN_STATE_ERROR_PASSIVE,
	GS_CAN_STATE_BUS_OFF,
	GS_CAN_STATE_STOPPED,
	GS_CAN_STATE_SLEEPING
};

/* data types passed between host and device */
struct gs_host_config {
	u32 byte_order;
} __packed;
/* All data exchanged between host and device is exchanged in host byte order,
 * thanks to the struct gs_host_config byte_order member, which is sent first
 * to indicate the desired byte order.
 */

struct gs_device_config {
	u8 reserved1;
	u8 reserved2;
	u8 reserved3;
	u8 icount;
	u32 sw_version;
	u32 hw_version;
} __packed;

struct gs_device_mode {
	u32 mode;
	u32 flags;
} __packed;

struct gs_device_state {
	u32 state;
	u32 rxerr;
	u32 txerr;
} __packed;

struct gs_device_bittiming {
	u32 prop_seg;
	u32 phase_seg1;
	u32 phase_seg2;
	u32 sjw;
	u32 brp;
} __packed;

struct gs_device_bt_const {
	u32 feature;
	u32 fclk_can;
	u32 tseg1_min;
	u32 tseg1_max;
	u32 tseg2_min;
	u32 tseg2_max;
	u32 sjw_max;
	u32 brp_min;
	u32 brp_max;
	u32 brp_inc;
} __packed;

struct gs_host_frame {
	u32 echo_id;
	u32 can_id;

	u8 can_dlc;
	u8 channel;
	u8 flags;
	u8 reserved;

	u8 data[8];
} __packed;

struct gs_tx_context {
	struct gs_can *dev;
	unsigned int echo_id;
};