/*
 * Copyright © 2006 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

/**
 * @file SDVO command definitions and structures.
 */

#define SDVO_OUTPUT_FIRST   (0)
#define SDVO_OUTPUT_TMDS0   (1 << 0)
#define SDVO_OUTPUT_RGB0    (1 << 1)
#define SDVO_OUTPUT_CVBS0   (1 << 2)
#define SDVO_OUTPUT_SVID0   (1 << 3)
#define SDVO_OUTPUT_YPRPB0  (1 << 4)
#define SDVO_OUTPUT_SCART0  (1 << 5)
#define SDVO_OUTPUT_LVDS0   (1 << 6)
#define SDVO_OUTPUT_TMDS1   (1 << 8)
#define SDVO_OUTPUT_RGB1    (1 << 9)
#define SDVO_OUTPUT_CVBS1   (1 << 10)
#define SDVO_OUTPUT_SVID1   (1 << 11)
#define SDVO_OUTPUT_YPRPB1  (1 << 12)
#define SDVO_OUTPUT_SCART1  (1 << 13)
#define SDVO_OUTPUT_LVDS1   (1 << 14)
#define SDVO_OUTPUT_LAST    (14)

struct i830_sdvo_caps {
    uint8_t vendor_id;
    uint8_t device_id;
    uint8_t device_rev_id;
    uint8_t sdvo_version_major;
    uint8_t sdvo_version_minor;
    unsigned int sdvo_inputs_mask:2;
    unsigned int smooth_scaling:1;
    unsigned int sharp_scaling:1;
    unsigned int up_scaling:1;
    unsigned int down_scaling:1;
    unsigned int stall_support:1;
    unsigned int pad:1;
    uint16_t output_flags;
} __attribute__((packed));

/** This matches the EDID DTD structure, more or less */
struct i830_sdvo_dtd {
    struct {
	uint16_t clock;		/**< pixel clock, in 10kHz units */
	uint8_t h_active;	/**< lower 8 bits (pixels) */
	uint8_t h_blank;	/**< lower 8 bits (pixels) */
	uint8_t h_high;		/**< upper 4 bits each h_active, h_blank */
	uint8_t v_active;	/**< lower 8 bits (lines) */
	uint8_t v_blank;	/**< lower 8 bits (lines) */
	uint8_t v_high;		/**< upper 4 bits each v_active, v_blank */
    } part1;

    struct {
	uint8_t h_sync_off;	/**< lower 8 bits, from hblank start */
	uint8_t h_sync_width;	/**< lower 8 bits (pixels) */
	/** lower 4 bits each vsync offset, vsync width */
	uint8_t v_sync_off_width;
	/**
	 * 2 high bits of hsync offset, 2 high bits of hsync width,
	 * bits 4-5 of vsync offset, and 2 high bits of vsync width.
	 */
	uint8_t sync_off_width_high;
	uint8_t dtd_flags;
	uint8_t sdvo_flags;
	/** bits 6-7 of vsync offset at bits 6-7 */
	uint8_t v_sync_off_high;
	uint8_t reserved;
    } part2;
} __attribute__((packed));

struct i830_sdvo_pixel_clock_range {
    uint16_t min;			/**< pixel clock, in 10kHz units */
    uint16_t max;			/**< pixel clock, in 10kHz units */
} __attribute__((packed));

struct i830_sdvo_preferred_input_timing_args {
    uint16_t clock;
    uint16_t width;
    uint16_t height;
} __attribute__((packed));

/* I2C registers for SDVO */
#define SDVO_I2C_ARG_0				0x07
#define SDVO_I2C_ARG_1				0x06
#define SDVO_I2C_ARG_2				0x05
#define SDVO_I2C_ARG_3				0x04
#define SDVO_I2C_ARG_4				0x03
#define SDVO_I2C_ARG_5				0x02
#define SDVO_I2C_ARG_6				0x01
#define SDVO_I2C_ARG_7				0x00
#define SDVO_I2C_OPCODE				0x08
#define SDVO_I2C_CMD_STATUS			0x09
#define SDVO_I2C_RETURN_0			0x0a
#define SDVO_I2C_RETURN_1			0x0b
#define SDVO_I2C_RETURN_2			0x0c
#define SDVO_I2C_RETURN_3			0x0d
#define SDVO_I2C_RETURN_4			0x0e
#define SDVO_I2C_RETURN_5			0x0f
#define SDVO_I2C_RETURN_6			0x10
#define SDVO_I2C_RETURN_7			0x11
#define SDVO_I2C_VENDOR_BEGIN			0x20

/* Status results */
#define SDVO_CMD_STATUS_POWER_ON		0x0
#define SDVO_CMD_STATUS_SUCCESS			0x1
#define SDVO_CMD_STATUS_NOTSUPP			0x2
#define SDVO_CMD_STATUS_INVALID_ARG		0x3
#define SDVO_CMD_STATUS_PENDING			0x4
#define SDVO_CMD_STATUS_TARGET_NOT_SPECIFIED	0x5
#define SDVO_CMD_STATUS_SCALING_NOT_SUPP	0x6

/* SDVO commands, argument/result registers */

#define SDVO_CMD_RESET					0x01

/** Returns a struct i830_sdvo_caps */
#define SDVO_CMD_GET_DEVICE_CAPS			0x02

#define SDVO_CMD_GET_FIRMWARE_REV			0x86
# define SDVO_DEVICE_FIRMWARE_MINOR			SDVO_I2C_RETURN_0
# define SDVO_DEVICE_FIRMWARE_MAJOR			SDVO_I2C_RETURN_1
# define SDVO_DEVICE_FIRMWARE_PATCH			SDVO_I2C_RETURN_2

/**
 * Reports which inputs are trained (managed to sync).
 *
 * Devices must have trained within 2 vsyncs of a mode change.
 */
#define SDVO_CMD_GET_TRAINED_INPUTS			0x03
struct i830_sdvo_get_trained_inputs_response {
    unsigned int input0_trained:1;
    unsigned int input1_trained:1;
    unsigned int pad:6;
} __attribute__((packed));

/** Returns a struct i830_sdvo_output_flags of active outputs. */
#define SDVO_CMD_GET_ACTIVE_OUTPUTS			0x04

/**
 * Sets the current set of active outputs.
 *
 * Takes a struct i830_sdvo_output_flags.  Must be preceded by a SET_IN_OUT_MAP
 * on multi-output devices.
 */
#define SDVO_CMD_SET_ACTIVE_OUTPUTS			0x05

/**
 * Returns the current mapping of SDVO inputs to outputs on the device.
 *
 * Returns two struct i830_sdvo_output_flags structures.
 */
#define SDVO_CMD_GET_IN_OUT_MAP				0x06

/**
 * Sets the current mapping of SDVO inputs to outputs on the device.
 *
 * Takes two struct i380_sdvo_output_flags structures.
 */
#define SDVO_CMD_SET_IN_OUT_MAP				0x07

/**
 * Returns a struct i830_sdvo_output_flags of attached displays.
 */
#define SDVO_CMD_GET_ATTACHED_DISPLAYS			0x0b

/**
 * Returns a struct i830_sdvo_ouptut_flags of displays supporting hot plugging.
 */
#define SDVO_CMD_GET_HOT_PLUG_SUPPORT			0x0c

/**
 * Takes a struct i830_sdvo_output_flags.
 */
#define SDVO_CMD_SET_ACTIVE_HOT_PLUG			0x0d

/**
 * Returns a struct i830_sdvo_output_flags of displays with hot plug
 * interrupts enabled.
 */
#define SDVO_CMD_GET_ACTIVE_HOT_PLUG			0x0e

#define SDVO_CMD_GET_INTERRUPT_EVENT_SOURCE		0x0f
struct i830_sdvo_get_interrupt_event_source_response {
    uint16_t interrupt_status;
    unsigned int ambient_light_interrupt:1;
    unsigned int pad:7;
} __attribute__((packed));

/**
 * Selects which input is affected by future input commands.
 *
 * Commands affected include SET_INPUT_TIMINGS_PART[12],
 * GET_INPUT_TIMINGS_PART[12], GET_PREFERRED_INPUT_TIMINGS_PART[12],
 * GET_INPUT_PIXEL_CLOCK_RANGE, and CREATE_PREFERRED_INPUT_TIMINGS.
 */
#define SDVO_CMD_SET_TARGET_INPUT			0x10
struct i830_sdvo_set_target_input_args {
    unsigned int target_1:1;
    unsigned int pad:7;
} __attribute__((packed));

/**
 * Takes a struct i830_sdvo_output_flags of which outputs are targetted by
 * future output commands.
 *
 * Affected commands inclue SET_OUTPUT_TIMINGS_PART[12],
 * GET_OUTPUT_TIMINGS_PART[12], and GET_OUTPUT_PIXEL_CLOCK_RANGE.
 */
#define SDVO_CMD_SET_TARGET_OUTPUT			0x11

#define SDVO_CMD_GET_INPUT_TIMINGS_PART1		0x12
#define SDVO_CMD_GET_INPUT_TIMINGS_PART2		0x13
#define SDVO_CMD_SET_INPUT_TIMINGS_PART1		0x14
#define SDVO_CMD_SET_INPUT_TIMINGS_PART2		0x15
#define SDVO_CMD_SET_OUTPUT_TIMINGS_PART1		0x16
#define SDVO_CMD_SET_OUTPUT_TIMINGS_PART2		0x17
#define SDVO_CMD_GET_OUTPUT_TIMINGS_PART1		0x18
#define SDVO_CMD_GET_OUTPUT_TIMINGS_PART2		0x19
/* Part 1 */
# define SDVO_DTD_CLOCK_LOW				SDVO_I2C_ARG_0
# define SDVO_DTD_CLOCK_HIGH				SDVO_I2C_ARG_1
# define SDVO_DTD_H_ACTIVE				SDVO_I2C_ARG_2
# define SDVO_DTD_H_BLANK				SDVO_I2C_ARG_3
# define SDVO_DTD_H_HIGH				SDVO_I2C_ARG_4
# define SDVO_DTD_V_ACTIVE				SDVO_I2C_ARG_5
# define SDVO_DTD_V_BLANK				SDVO_I2C_ARG_6
# define SDVO_DTD_V_HIGH				SDVO_I2C_ARG_7
/* Part 2 */
# define SDVO_DTD_HSYNC_OFF				SDVO_I2C_ARG_0
# define SDVO_DTD_HSYNC_WIDTH				SDVO_I2C_ARG_1
# define SDVO_DTD_VSYNC_OFF_WIDTH			SDVO_I2C_ARG_2
# define SDVO_DTD_SYNC_OFF_WIDTH_HIGH			SDVO_I2C_ARG_3
# define SDVO_DTD_DTD_FLAGS				SDVO_I2C_ARG_4
# define SDVO_DTD_DTD_FLAG_INTERLACED				(1 << 7)
# define SDVO_DTD_DTD_FLAG_STEREO_MASK				(3 << 5)
# define SDVO_DTD_DTD_FLAG_INPUT_MASK				(3 << 3)
# define SDVO_DTD_DTD_FLAG_SYNC_MASK				(3 << 1)
# define SDVO_DTD_SDVO_FLAS				SDVO_I2C_ARG_5
# define SDVO_DTD_SDVO_FLAG_STALL				(1 << 7)
# define SDVO_DTD_SDVO_FLAG_CENTERED				(0 << 6)
# define SDVO_DTD_SDVO_FLAG_UPPER_LEFT				(1 << 6)
# define SDVO_DTD_SDVO_FLAG_SCALING_MASK			(3 << 4)
# define SDVO_DTD_SDVO_FLAG_SCALING_NONE			(0 << 4)
# define SDVO_DTD_SDVO_FLAG_SCALING_SHARP			(1 << 4)
# define SDVO_DTD_SDVO_FLAG_SCALING_SMOOTH			(2 << 4)
# define SDVO_DTD_VSYNC_OFF_HIGH			SDVO_I2C_ARG_6

/**
 * Generates a DTD based on the given width, height, and flags.
 *
 * This will be supported by any device supporting scaling or interlaced
 * modes.
 */
#define SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING		0x1a
# define SDVO_PREFERRED_INPUT_TIMING_CLOCK_LOW		SDVO_I2C_ARG_0
# define SDVO_PREFERRED_INPUT_TIMING_CLOCK_HIGH		SDVO_I2C_ARG_1
# define SDVO_PREFERRED_INPUT_TIMING_WIDTH_LOW		SDVO_I2C_ARG_2
# define SDVO_PREFERRED_INPUT_TIMING_WIDTH_HIGH		SDVO_I2C_ARG_3
# define SDVO_PREFERRED_INPUT_TIMING_HEIGHT_LOW		SDVO_I2C_ARG_4
# define SDVO_PREFERRED_INPUT_TIMING_HEIGHT_HIGH	SDVO_I2C_ARG_5
# define SDVO_PREFERRED_INPUT_TIMING_FLAGS		SDVO_I2C_ARG_6
# define SDVO_PREFERRED_INPUT_TIMING_FLAGS_INTERLACED		(1 << 0)
# define SDVO_PREFERRED_INPUT_TIMING_FLAGS_SCALED		(1 << 1)

#define SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART1	0x1b
#define SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART2	0x1c

/** Returns a struct i830_sdvo_pixel_clock_range */
#define SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE		0x1d
/** Returns a struct i830_sdvo_pixel_clock_range */
#define SDVO_CMD_GET_OUTPUT_PIXEL_CLOCK_RANGE		0x1e

/** Returns a byte bitfield containing SDVO_CLOCK_RATE_MULT_* flags */
#define SDVO_CMD_GET_SUPPORTED_CLOCK_RATE_MULTS		0x1f

/** Returns a byte containing a SDVO_CLOCK_RATE_MULT_* flag */
#define SDVO_CMD_GET_CLOCK_RATE_MULT			0x20
/** Takes a byte containing a SDVO_CLOCK_RATE_MULT_* flag */
#define SDVO_CMD_SET_CLOCK_RATE_MULT			0x21
# define SDVO_CLOCK_RATE_MULT_1X				(1 << 0)
# define SDVO_CLOCK_RATE_MULT_2X				(1 << 1)
# define SDVO_CLOCK_RATE_MULT_4X				(1 << 3)

#define SDVO_CMD_GET_SUPPORTED_TV_FORMATS		0x27

#define SDVO_CMD_GET_TV_FORMAT				0x28

#define SDVO_CMD_SET_TV_FORMAT				0x29

#define SDVO_CMD_GET_SUPPORTED_POWER_STATES		0x2a
#define SDVO_CMD_GET_ENCODER_POWER_STATE		0x2b
#define SDVO_CMD_SET_ENCODER_POWER_STATE		0x2c
# define SDVO_ENCODER_STATE_ON					(1 << 0)
# define SDVO_ENCODER_STATE_STANDBY				(1 << 1)
# define SDVO_ENCODER_STATE_SUSPEND				(1 << 2)
# define SDVO_ENCODER_STATE_OFF					(1 << 3)

#define SDVO_CMD_SET_TV_RESOLUTION_SUPPORT		0x93

#define SDVO_CMD_SET_CONTROL_BUS_SWITCH			0x7a
# define SDVO_CONTROL_BUS_PROM				0x0
# define SDVO_CONTROL_BUS_DDC1				0x1
# define SDVO_CONTROL_BUS_DDC2				0x2
# define SDVO_CONTROL_BUS_DDC3				0x3