path: root/drivers/media/video/rj54n1cb0c.c

/*
 * Driver for RJ54N1CB0C CMOS Image Sensor from Micron
 *
 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/videodev2.h>

#include <media/v4l2-subdev.h>
#include <media/v4l2-chip-ident.h>
#include <media/soc_camera.h>
#include <media/soc_mediabus.h>

#define RJ54N1_DEV_CODE			0x0400
#define RJ54N1_DEV_CODE2		0x0401
#define RJ54N1_OUT_SEL			0x0403
#define RJ54N1_XY_OUTPUT_SIZE_S_H	0x0404
#define RJ54N1_X_OUTPUT_SIZE_S_L	0x0405
#define RJ54N1_Y_OUTPUT_SIZE_S_L	0x0406
#define RJ54N1_XY_OUTPUT_SIZE_P_H	0x0407
#define RJ54N1_X_OUTPUT_SIZE_P_L	0x0408
#define RJ54N1_Y_OUTPUT_SIZE_P_L	0x0409
#define RJ54N1_LINE_LENGTH_PCK_S_H	0x040a
#define RJ54N1_LINE_LENGTH_PCK_S_L	0x040b
#define RJ54N1_LINE_LENGTH_PCK_P_H	0x040c
#define RJ54N1_LINE_LENGTH_PCK_P_L	0x040d
#define RJ54N1_RESIZE_N			0x040e
#define RJ54N1_RESIZE_N_STEP		0x040f
#define RJ54N1_RESIZE_STEP		0x0410
#define RJ54N1_RESIZE_HOLD_H		0x0411
#define RJ54N1_RESIZE_HOLD_L		0x0412
#define RJ54N1_H_OBEN_OFS		0x0413
#define RJ54N1_V_OBEN_OFS		0x0414
#define RJ54N1_RESIZE_CONTROL		0x0415
#define RJ54N1_INC_USE_SEL_H		0x0425
#define RJ54N1_INC_USE_SEL_L		0x0426
#define RJ54N1_MIRROR_STILL_MODE	0x0427
#define RJ54N1_INIT_START		0x0428
#define RJ54N1_SCALE_1_2_LEV		0x0429
#define RJ54N1_SCALE_4_LEV		0x042a
#define RJ54N1_Y_GAIN			0x04d8
#define RJ54N1_APT_GAIN_UP		0x04fa
#define RJ54N1_RA_SEL_UL		0x0530
#define RJ54N1_BYTE_SWAP		0x0531
#define RJ54N1_OUT_SIGPO		0x053b
#define RJ54N1_FRAME_LENGTH_S_H		0x0595
#define RJ54N1_FRAME_LENGTH_S_L		0x0596
#define RJ54N1_FRAME_LENGTH_P_H		0x0597
#define RJ54N1_FRAME_LENGTH_P_L		0x0598
#define RJ54N1_IOC			0x05ef
#define RJ54N1_TG_BYPASS		0x0700
#define RJ54N1_PLL_L			0x0701
#define RJ54N1_PLL_N			0x0702
#define RJ54N1_PLL_EN			0x0704
#define RJ54N1_RATIO_TG			0x0706
#define RJ54N1_RATIO_T			0x0707
#define RJ54N1_RATIO_R			0x0708
#define RJ54N1_RAMP_TGCLK_EN		0x0709
#define RJ54N1_OCLK_DSP			0x0710
#define RJ54N1_RATIO_OP			0x0711
#define RJ54N1_RATIO_O			0x0712
#define RJ54N1_OCLK_SEL_EN		0x0713
#define RJ54N1_CLK_RST			0x0717
#define RJ54N1_RESET_STANDBY		0x0718

#define E_EXCLK				(1 << 7)
#define SOFT_STDBY			(1 << 4)
#define SEN_RSTX			(1 << 2)
#define TG_RSTX				(1 << 1)
#define DSP_RSTX			(1 << 0)

#define RESIZE_HOLD_SEL			(1 << 2)
#define RESIZE_GO			(1 << 1)

#define RJ54N1_COLUMN_SKIP		0
#define RJ54N1_ROW_SKIP			0
#define RJ54N1_MAX_WIDTH		1600
#define RJ54N1_MAX_HEIGHT		1200

/* I2C addresses: 0x50, 0x51, 0x60, 0x61 */

/* RJ54N1CB0C has only one fixed colorspace per pixelcode */
struct rj54n1_datafmt {
	enum v4l2_mbus_pixelcode	code;
	enum v4l2_colorspace		colorspace;
};

/* Find a data format by a pixel code in an array */
static const struct rj54n1_datafmt *rj54n1_find_datafmt(
	enum v4l2_mbus_pixelcode code, const struct rj54n1_datafmt *fmt,
	int n)
{
	int i;
	for (i = 0; i < n; i++)
		if (fmt[i].code == code)
			return fmt + i;

	return NULL;
}

static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
	{V4L2_MBUS_FMT_YUYV8_2X8_LE, V4L2_COLORSPACE_JPEG},
	{V4L2_MBUS_FMT_YVYU8_2X8_LE, V4L2_COLORSPACE_JPEG},
	{V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
	{V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
	{V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
	{V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
	{V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
	{V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
	{V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
};

struct rj54n1_clock_div {
	u8 ratio_tg;
	u8 ratio_t;
	u8 ratio_r;
	u8 ratio_op;
	u8 ratio_o;