/*
 * SDVO command definitions and structures.
 *
 * Copyright (c) 2008, Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Authors:
 *	Eric Anholt <eric@anholt.net>
 */

#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 psb_intel_sdvo_caps {
	u8 vendor_id;
	u8 device_id;
	u8 device_rev_id;
	u8 sdvo_version_major;
	u8 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;
	u16 output_flags;
} __attribute__ ((packed));

/** This matches the EDID DTD structure, more or less */
struct psb_intel_sdvo_dtd {
	struct {
		u16 clock;	/**< pixel clock, in 10kHz units */
		u8 h_active;	/**< lower 8 bits (pixels) */
		u8 h_blank;	/**< lower 8 bits (pixels) */
		u8 h_high;	/**< upper 4 bits each h_active, h_blank */
		u8 v_active;	/**< lower 8 bits (lines) */
		u8 v_blank;	/**< lower 8 bits (lines) */
		u8 v_high;	/**< upper 4 bits each v_active, v_blank */
	} part1;

	struct {
		u8 h_sync_off;
			/**< lower 8 bits, from hblank start */
		u8 h_sync_width;/**< lower 8 bits (pixels) */
	/** lower 4 bits each vsync offset, vsync width */
		u8 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.
	 */
		u8 sync_off_width_high;
		u8 dtd_flags;
		u8 sdvo_flags;
	/** bits 6-7 of vsync offset at bits 6-7 */
		u8 v_sync_off_high;
		u8 reserved;
	} part2;
} __attribute__ ((packed));

struct psb_intel_sdvo_pixel_clock_range {
	u16 min;		/**< pixel clock, in 10kHz units */
	u16 max;		/**< pixel clock, in 10kHz units */
} __attribute__ ((packed));

struct psb_intel_sdvo_preferred_input_timing_args {
	u16 clock;
	u16 width;
	u16 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 psb_intel_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 psb_intel_sdvo_get_trained_inputs_response {
	unsigned int input0_trained:1;
	unsigned int input1_trained:1;
	unsigned int pad:6;
} __attribute__ ((packed));

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

/**
 * Sets the current set of active outputs.
 *
 * Takes a struct psb_intel_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 psb_intel_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 psb_intel_sdvo_output_flags of attached displays.
 */
#define SDVO_CMD_GET_ATTACHED_DISPLAYS			0x0b

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

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

/**
 * Returns a struct psb_intel_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 psb_intel_sdvo_get_interrupt_event_source_response {
	u16 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 psb_intel_sdvo_set_target_input_args {
	unsigned int target_1:1;
	unsigned int pad:7;
} __attribute__ ((packed));

/**
 * Takes a struct psb_intel_sdvo_output_flags of which outputs are targeted 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 psb_intel_sdvo_pixel_clock_range */
#define SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE		0x1d
/** Returns a struct psb_intel_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

/* SDVO Bus & SDVO Inputs wiring details*/
/* Bit 0: Is SDVOB connected to In0 (1 = yes, 0 = no*/
/* Bit 1: Is SDVOB connected to In1 (1 = yes, 0 = no*/
/* Bit 2: Is SDVOC connected to In0 (1 = yes, 0 = no*/
/* Bit 3: Is SDVOC connected to In1 (1 = yes, 0 = no*/
#define SDVOB_IN0 0x01
#define SDVOB_IN1 0x02
#define SDVOC_IN0 0x04
#define SDVOC_IN1 0x08

#define SDVO_DEVICE_NONE 0x00
#define        SDVO_DEVICE_CRT 0x01
#define        SDVO_DEVICE_TV 0x02
#define        SDVO_DEVICE_LVDS 0x04
#define        SDVO_DEVICE_TMDS 0x08