#ifndef ISP2401
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2015, 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.
 */
#else
/*
Support for Intel Camera Imaging ISP subsystem.
Copyright (c) 2010 - 2015, 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.
*/
#endif

#include "platform_support.h"

#include "ia_css_inputfifo.h"

#include "device_access.h"

#define __INLINE_SP__
#include "sp.h"
#define __INLINE_ISP__
#include "isp.h"
#define __INLINE_IRQ__
#include "irq.h"
#define __INLINE_FIFO_MONITOR__
#include "fifo_monitor.h"

#define __INLINE_EVENT__
#include "event_fifo.h"
#define __INLINE_SP__

#if !defined(HAS_NO_INPUT_SYSTEM)
#include "input_system.h"	/* MIPI_PREDICTOR_NONE,... */
#endif

#include "assert_support.h"

/* System independent */
#include "sh_css_internal.h"
#if !defined(HAS_NO_INPUT_SYSTEM)
#include "ia_css_isys.h"
#endif

#define HBLANK_CYCLES (187)
#define MARKER_CYCLES (6)

#if !defined(HAS_NO_INPUT_SYSTEM)
#include <hive_isp_css_streaming_to_mipi_types_hrt.h>
#endif

/* The data type is used to send special cases:
 * yuv420: odd lines (1, 3 etc) are twice as wide as even
 *         lines (0, 2, 4 etc).
 * rgb: for two pixels per clock, the R and B values are sent
 *      to output_0 while only G is sent to output_1. This means
 *      that output_1 only gets half the number of values of output_0.
 *      WARNING: This type should also be used for Legacy YUV420.
 * regular: used for all other data types (RAW, YUV422, etc)
 */
enum inputfifo_mipi_data_type {
	inputfifo_mipi_data_type_regular,
	inputfifo_mipi_data_type_yuv420,
	inputfifo_mipi_data_type_yuv420_legacy,
	inputfifo_mipi_data_type_rgb,
};
#if !defined(HAS_NO_INPUT_SYSTEM)
static unsigned int inputfifo_curr_ch_id, inputfifo_curr_fmt_type;
#endif
struct inputfifo_instance {
	unsigned int				ch_id;
	enum ia_css_stream_format	input_format;
	bool						two_ppc;
	bool						streaming;
	unsigned int				hblank_cycles;
	unsigned int				marker_cycles;
	unsigned int				fmt_type;
	enum inputfifo_mipi_data_type	type;
};
#if !defined(HAS_NO_INPUT_SYSTEM)
/*
 * Maintain a basic streaming to Mipi administration with ch_id as index
 * ch_id maps on the "Mipi virtual channel ID" and can have value 0..3
 */
#define INPUTFIFO_NR_OF_S2M_CHANNELS	(4)
static struct inputfifo_instance
	inputfifo_inst_admin[INPUTFIFO_NR_OF_S2M_CHANNELS];

/* Streaming to MIPI */
static unsigned inputfifo_wrap_marker(
/* static inline unsigned inputfifo_wrap_marker( */
	unsigned marker)
{
	return marker |
	(inputfifo_curr_ch_id << HIVE_STR_TO_MIPI_CH_ID_LSB) |
	(inputfifo_curr_fmt_type << _HIVE_STR_TO_MIPI_FMT_TYPE_LSB);
}

static inline void
_sh_css_fifo_snd(unsigned token)
{
	while (!can_event_send_token(STR2MIPI_EVENT_ID))
		hrt_sleep();
	event_send_token(STR2MIPI_EVENT_ID, token);
	return;
}

static void inputfifo_send_data_a(
/* static inline void inputfifo_send_data_a( */
unsigned int data)
{
	unsigned int token = (1 << HIVE_STR_TO_MIPI_VALID_A_BIT) |
			     (data << HIVE_STR_TO_MIPI_DATA_A_LSB);
	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_data_b(
/* static inline void inputfifo_send_data_b( */
	unsigned int data)
{
	unsigned int token = (1 << HIVE_STR_TO_MIPI_VALID_B_BIT) |
			     (data << _HIVE_STR_TO_MIPI_DATA_B_LSB);
	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_data(
/* static inline void inputfifo_send_data( */
	unsigned int a,
	unsigned int b)
{
	unsigned int token = ((1 << HIVE_STR_TO_MIPI_VALID_A_BIT) |
			      (1 << HIVE_STR_TO_MIPI_VALID_B_BIT) |
			      (a << HIVE_STR_TO_MIPI_DATA_A_LSB) |
			      (b << _HIVE_STR_TO_MIPI_DATA_B_LSB));
	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_sol(void)
/* static inline void inputfifo_send_sol(void) */
{
	hrt_data	token = inputfifo_wrap_marker(
		1 << HIVE_STR_TO_MIPI_SOL_BIT);

	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_eol(void)
/* static inline void inputfifo_send_eol(void) */
{
	hrt_data	token = inputfifo_wrap_marker(
		1 << HIVE_STR_TO_MIPI_EOL_BIT);
	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_sof(void)
/* static inline void inputfifo_send_sof(void) */
{
	hrt_data	token = inputfifo_wrap_marker(
		1 << HIVE_STR_TO_MIPI_SOF_BIT);

	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_eof(void)
/* static inline void inputfifo_send_eof(void) */
{
	hrt_data	token = inputfifo_wrap_marker(
		1 << HIVE_STR_TO_MIPI_EOF_BIT);
	_sh_css_fifo_snd(token);
	return;
}



#ifdef __ON__
static void inputfifo_send_ch_id(
/* static inline void inputfifo_send_ch_id( */
	unsigned int ch_id)
{
	hrt_data	token;
	inputfifo_curr_ch_id = ch_id & _HIVE_ISP_CH_ID_MASK;
	/* we send an zero marker, this will wrap the ch_id and
	 * fmt_type automatically.
	 */
	token = inputfifo_wrap_marker(0);
	_sh_css_fifo_snd(token);
	return;
}

static void inputfifo_send_fmt_type(
/* static inline void inputfifo_send_fmt_type( */
	unsigned int fmt_type)
{
	hrt_data	token;
	inputfifo_curr_fmt_type = fmt_type & _HIVE_ISP_FMT_TYPE_MASK;
	/* we send an zero marker, this will wrap the ch_id and
	 * fmt_type automatically.
	 */
	token = inputfifo_wrap_marker(0);
	_sh_css_fifo_snd(token);
	return;
}
#endif /*  __ON__ */



static void inputfifo_send_ch_id_and_fmt_type(
/* static inline
void inputfifo_send_ch_id_and_fmt_type( */
	unsigned int ch_id,
	unsigned int fmt_type)
{
	hrt_data	token;
	inputfifo_curr_ch_id = ch_id & _HIVE_ISP_CH_ID_MASK;
	inputfifo_curr_fmt_type = fmt_type & _HIVE_ISP_FMT_TYPE_MASK;
	/* we send an zero marker, this will wrap the ch_id and
	 * fmt_type automatically.
	 */
	token = inputfifo_wrap_marker(0);
	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_send_empty_token(void)
/* static inline void inputfifo_send_empty_token(void) */
{
	hrt_data	token = inputfifo_wrap_marker(0);
	_sh_css_fifo_snd(token);
	return;
}



static void inputfifo_start_frame(
/* static inline void inputfifo_start_frame( */
	unsigned int ch_id,
	unsigned int fmt_type)
{
	inputfifo_send_ch_id_and_fmt_type(ch_id, fmt_type);
	inputfifo_send_sof();
	return;
}



static void inputfifo_end_frame(
	unsigned int marker_cycles)
{
	unsigned int i;
	for (i = 0; i < marker_cycles; i++)
		inputfifo_send_empty_token();
	inputfifo_send_eof();
	return;
}



static void inputfifo_send_line2(
	const unsigned short *data,
	unsigned int width,
	const unsigned short *data2,
	unsigned int width2,
	unsigned int hblank_cycles,
	unsigned int marker_cycles,
	unsigned int two_ppc,
	enum inputfifo_mipi_data_type type)
{
	unsigned int i, is_rgb = 0, is_legacy = 0;

	assert(data != NULL);
	assert((data2 != NULL) || (width2 == 0));
	if (type == inputfifo_mipi_data_type_rgb)
		is_rgb = 1;

	if (type == inputfifo_mipi_data_type_yuv420_legacy)
		is_legacy = 1;

	for (i = 0; i < hblank_cycles; i++)
		inputfifo_send_empty_token();
	inputfifo_send_sol();
	for (i = 0; i < marker_cycles; i++)
		inputfifo_send_empty_token();
	for (i = 0; i < width; i++, data++) {
		/* for RGB in two_ppc, we only actually send 2 pixels per
		 * clock in the even pixels (0, 2 etc). In the other cycles,
		 * we only send 1 pixel, to data[0].
		 */
		unsigned int send_two_pixels = two_ppc;
		if ((is_rgb || is_legacy) && (i % 3 == 2))
			send_two_pixels = 0;
		if (send_two_pixels) {
			if (i + 1 == width) {
				/* for jpg (binary) copy, this can occur
				 * if the file contains an odd number of bytes.
				 */
				inputfifo_send_data(
							data[0], 0);
			} else {
				inputfifo_send_data(
							data[0], data[1]);
			}
			/* Additional increment because we send 2 pixels */
			data++;
			i++;
		} else if (two_ppc && is_legacy) {
			inputfifo_send_data_b(data[0]);
		} else {
			inputfifo_send_data_a(data[0]);
		}
	}

	for (i = 0; i < width2; i++, data2++) {
		/* for RGB in two_ppc, we only actually send 2 pixels per
		 * clock in the even pixels (0, 2 etc). In the other cycles,
		 * we only send 1 pixel, to data2[0].
		 */
		unsigned int send_two_pixels = two_ppc;
		if ((is_rgb || is_legacy) && (i % 3 == 2))
			send_two_pixels = 0;
		if (send_two_pixels) {
			if (i + 1 == width2) {
				/* for jpg (binary) copy, this can occur
				 * if the file contains an odd number of bytes.
				 */
				inputfifo_send_data(
							data2[0], 0);
			} else {
				inputfifo_send_data(
							data2[0], data2[1]);
			}
			/* Additional increment because we send 2 pixels */
			data2++;
			i++;
		} else if (two_ppc && is_legacy) {
			inputfifo_send_data_b(data2[0]);
		} else {
			inputfifo_send_data_a(data2[0]);
		}
	}
	for (i = 0; i < hblank_cycles; i++)
		inputfifo_send_empty_token();
	inputfifo_send_eol();
	return;
}



static void
inputfifo_send_line(const unsigned short *data,
			 unsigned int width,
			 unsigned int hblank_cycles,
			 unsigned int marker_cycles,
			 unsigned int two_ppc,
			 enum inputfifo_mipi_data_type type)
{
	assert(data != NULL);
	inputfifo_send_line2(data, width, NULL, 0,
					hblank_cycles,
					marker_cycles,
					two_ppc,
					type);
}


/* Send a frame of data into the input network via the GP FIFO.
 *  Parameters:
 *   - data: array of 16 bit values that contains all data for the frame.
 *   - width: width of a line in number of subpixels, for yuv420 it is the
 *            number of Y components per line.
 *   - height: height of the frame in number of lines.
 *   - ch_id: channel ID.
 *   - fmt_type: format type.
 *   - hblank_cycles: length of horizontal blanking in cycles.
 *   - marker_cycles: number of empty cycles after start-of-line and before
 *                    end-of-frame.
 *   - two_ppc: boolean, describes whether to send one or two pixels per clock
 *              cycle. In this mode, we sent pixels N and N+1 in the same cycle,
 *              to IF_PRIM_A and IF_PRIM_B respectively. The caller must make
 *              sure the input data has been formatted correctly for this.
 *              For example, for RGB formats this means that unused values
 *              must be inserted.
 *   - yuv420: boolean, describes whether (non-legacy) yuv420 data is used. In
 *             this mode, the odd lines (1,3,5 etc) are half as long as the
 *             even lines (2,4,6 etc).
 *             Note that the first line is odd (1) and the second line is even
 *             (2).
 *
 * This function does not do any reordering of pixels, the caller must make
 * sure the data is in the righ format. Please refer to the CSS receiver
 * documentation for details on the data formats.
 */

static void inputfifo_send_frame(
	const unsigned short *data,
	unsigned int width,
	unsigned int height,
	unsigned int ch_id,
	unsigned int fmt_type,
	unsigned int hblank_cycles,
	unsigned int marker_cycles,
	unsigned int two_ppc,
	enum inputfifo_mipi_data_type type)
{
	unsigned int i;

	assert(data != NULL);
	inputfifo_start_frame(ch_id, fmt_type);

	for (i = 0; i < height; i++) {
		if ((type == inputfifo_mipi_data_type_yuv420) &&
		    (i & 1) == 1) {
			inputfifo_send_line(data, 2 * width,
							   hblank_cycles,
							   marker_cycles,
							   two_ppc, type);
			data += 2 * width;
		} else {
			inputfifo_send_line(data, width,
							   hblank_cycles,
							   marker_cycles,
							   two_ppc, type);
			data += width;
		}
	}
	inputfifo_end_frame(marker_cycles);
	return;
}



static enum inputfifo_mipi_data_type inputfifo_determine_type(
	enum ia_css_stream_format input_format)
{
	enum inputfifo_mipi_data_type type;

	type = inputfifo_mipi_data_type_regular;
	if (input_format == IA_CSS_STREAM_FORMAT_YUV420_8_LEGACY) {
		type =
			inputfifo_mipi_data_type_yuv420_legacy;
	} else if (input_format == IA_CSS_STREAM_FORMAT_YUV420_8  ||
		   input_format == IA_CSS_STREAM_FORMAT_YUV420_10 ||
		   input_format == IA_CSS_STREAM_FORMAT_YUV420_16) {
		type =
			inputfifo_mipi_data_type_yuv420;
	} else if (input_format >= IA_CSS_STREAM_FORMAT_RGB_444 &&
		   input_format <= IA_CSS_STREAM_FORMAT_RGB_888) {
		type =
			inputfifo_mipi_data_type_rgb;
	}
	return type;
}



static struct inputfifo_instance *inputfifo_get_inst(
	unsigned int ch_id)
{
	return &inputfifo_inst_admin[ch_id];
}

void ia_css_inputfifo_send_input_frame(
	const unsigned short *data,
	unsigned int width,
	unsigned int height,
	unsigned int ch_id,
	enum ia_css_stream_format input_format,
	bool two_ppc)
{
	unsigned int fmt_type, hblank_cycles, marker_cycles;
	enum inputfifo_mipi_data_type type;

	assert(data != NULL);
	hblank_cycles = HBLANK_CYCLES;
	marker_cycles = MARKER_CYCLES;
	ia_css_isys_convert_stream_format_to_mipi_format(input_format,
				 MIPI_PREDICTOR_NONE,
				 &fmt_type);

	type = inputfifo_determine_type(input_format);

	inputfifo_send_frame(data, width, height,
			ch_id, fmt_type, hblank_cycles, marker_cycles,
			two_ppc, type);
}



void ia_css_inputfifo_start_frame(
	unsigned int ch_id,
	enum ia_css_stream_format input_format,
	bool two_ppc)
{
	struct inputfifo_instance *s2mi;
	s2mi = inputfifo_get_inst(ch_id);

	s2mi->ch_id = ch_id;
	ia_css_isys_convert_stream_format_to_mipi_format(input_format,
				MIPI_PREDICTOR_NONE,
				&s2mi->fmt_type);
	s2mi->two_ppc = two_ppc;
	s2mi->type = inputfifo_determine_type(input_format);
	s2mi->hblank_cycles = HBLANK_CYCLES;
	s2mi->marker_cycles = MARKER_CYCLES;
	s2mi->streaming = true;

	inputfifo_start_frame(ch_id, s2mi->fmt_type);
	return;
}



void ia_css_inputfifo_send_line(
	unsigned int ch_id,
	const unsigned short *data,
	unsigned int width,
	const unsigned short *data2,
	unsigned int width2)
{
	struct inputfifo_instance *s2mi;

	assert(data != NULL);
	assert((data2 != NULL) || (width2 == 0));
	s2mi = inputfifo_get_inst(ch_id);


	/* Set global variables that indicate channel_id and format_type */
	inputfifo_curr_ch_id = (s2mi->ch_id) & _HIVE_ISP_CH_ID_MASK;
	inputfifo_curr_fmt_type = (s2mi->fmt_type) & _HIVE_ISP_FMT_TYPE_MASK;

	inputfifo_send_line2(data, width, data2, width2,
					s2mi->hblank_cycles,
					s2mi->marker_cycles,
					s2mi->two_ppc,
					s2mi->type);
}


void ia_css_inputfifo_send_embedded_line(
	unsigned int	ch_id,
	enum ia_css_stream_format	data_type,
	const unsigned short	*data,
	unsigned int	width)
{
	struct inputfifo_instance *s2mi;
	unsigned int fmt_type;

	assert(data != NULL);
	s2mi = inputfifo_get_inst(ch_id);
	ia_css_isys_convert_stream_format_to_mipi_format(data_type,
			MIPI_PREDICTOR_NONE, &fmt_type);

	/* Set format_type for metadata line. */
	inputfifo_curr_fmt_type = fmt_type & _HIVE_ISP_FMT_TYPE_MASK;

	inputfifo_send_line(data, width, s2mi->hblank_cycles, s2mi->marker_cycles,
			s2mi->two_ppc, inputfifo_mipi_data_type_regular);
}


void ia_css_inputfifo_end_frame(
	unsigned int	ch_id)
{
	struct inputfifo_instance *s2mi;
	s2mi = inputfifo_get_inst(ch_id);

	/* Set global variables that indicate channel_id and format_type */
	inputfifo_curr_ch_id = (s2mi->ch_id) & _HIVE_ISP_CH_ID_MASK;
	inputfifo_curr_fmt_type = (s2mi->fmt_type) & _HIVE_ISP_FMT_TYPE_MASK;

	/* Call existing HRT function */
	inputfifo_end_frame(s2mi->marker_cycles);

	s2mi->streaming = false;
	return;
}
#endif /* #if !defined(HAS_NO_INPUT_SYSTEM) */