mt9m111.c

trident tm5600的linux驱动

/*
 * Driver for MT9M111 CMOS Image Sensor from Micron
 *
 * Copyright (C) 2008, Robert Jarzmik <[e-mail]>
 *
 * 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/videodev2.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/log2.h>
#include <linux/gpio.h>
#include <linux/delay.h>

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

/*
 * mt9m111 i2c address is 0x5d or 0x48 (depending on SAddr pin)
 * The platform has to define i2c_board_info and call i2c_register_board_info()
 */

/* mt9m111: Sensor register addresses */
#define MT9M111_CHIP_VERSION		0x000
#define MT9M111_ROW_START		0x001
#define MT9M111_COLUMN_START		0x002
#define MT9M111_WINDOW_HEIGHT		0x003
#define MT9M111_WINDOW_WIDTH		0x004
#define MT9M111_HORIZONTAL_BLANKING_B	0x005
#define MT9M111_VERTICAL_BLANKING_B	0x006
#define MT9M111_HORIZONTAL_BLANKING_A	0x007
#define MT9M111_VERTICAL_BLANKING_A	0x008
#define MT9M111_SHUTTER_WIDTH		0x009
#define MT9M111_ROW_SPEED		0x00a
#define MT9M111_EXTRA_DELAY		0x00b
#define MT9M111_SHUTTER_DELAY		0x00c
#define MT9M111_RESET			0x00d
#define MT9M111_READ_MODE_B		0x020
#define MT9M111_READ_MODE_A		0x021
#define MT9M111_FLASH_CONTROL		0x023
#define MT9M111_GREEN1_GAIN		0x02b
#define MT9M111_BLUE_GAIN		0x02c
#define MT9M111_RED_GAIN		0x02d
#define MT9M111_GREEN2_GAIN		0x02e
#define MT9M111_GLOBAL_GAIN		0x02f
#define MT9M111_CONTEXT_CONTROL		0x0c8
#define MT9M111_PAGE_MAP		0x0f0
#define MT9M111_BYTE_WISE_ADDR		0x0f1

#define MT9M111_RESET_SYNC_CHANGES	(1 << 15)
#define MT9M111_RESET_RESTART_BAD_FRAME	(1 << 9)
#define MT9M111_RESET_SHOW_BAD_FRAMES	(1 << 8)
#define MT9M111_RESET_RESET_SOC		(1 << 5)
#define MT9M111_RESET_OUTPUT_DISABLE	(1 << 4)
#define MT9M111_RESET_CHIP_ENABLE	(1 << 3)
#define MT9M111_RESET_ANALOG_STANDBY	(1 << 2)
#define MT9M111_RESET_RESTART_FRAME	(1 << 1)
#define MT9M111_RESET_RESET_MODE	(1 << 0)

#define MT9M111_RMB_MIRROR_COLS		(1 << 1)
#define MT9M111_RMB_MIRROR_ROWS		(1 << 0)
#define MT9M111_CTXT_CTRL_RESTART	(1 << 15)
#define MT9M111_CTXT_CTRL_DEFECTCOR_B	(1 << 12)
#define MT9M111_CTXT_CTRL_RESIZE_B	(1 << 10)
#define MT9M111_CTXT_CTRL_CTRL2_B	(1 << 9)
#define MT9M111_CTXT_CTRL_GAMMA_B	(1 << 8)
#define MT9M111_CTXT_CTRL_XENON_EN	(1 << 7)
#define MT9M111_CTXT_CTRL_READ_MODE_B	(1 << 3)
#define MT9M111_CTXT_CTRL_LED_FLASH_EN	(1 << 2)
#define MT9M111_CTXT_CTRL_VBLANK_SEL_B	(1 << 1)
#define MT9M111_CTXT_CTRL_HBLANK_SEL_B	(1 << 0)
/*
 * mt9m111: Colorpipe register addresses (0x100..0x1ff)
 */
#define MT9M111_OPER_MODE_CTRL		0x106
#define MT9M111_OUTPUT_FORMAT_CTRL	0x108
#define MT9M111_REDUCER_XZOOM_B		0x1a0
#define MT9M111_REDUCER_XSIZE_B		0x1a1
#define MT9M111_REDUCER_YZOOM_B		0x1a3
#define MT9M111_REDUCER_YSIZE_B		0x1a4
#define MT9M111_REDUCER_XZOOM_A		0x1a6
#define MT9M111_REDUCER_XSIZE_A		0x1a7
#define MT9M111_REDUCER_YZOOM_A		0x1a9
#define MT9M111_REDUCER_YSIZE_A		0x1aa

#define MT9M111_OUTPUT_FORMAT_CTRL2_A	0x13a
#define MT9M111_OUTPUT_FORMAT_CTRL2_B	0x19b

#define MT9M111_OPMODE_AUTOEXPO_EN	(1 << 14)


#define MT9M111_OUTFMT_PROCESSED_BAYER	(1 << 14)
#define MT9M111_OUTFMT_BYPASS_IFP	(1 << 10)
#define MT9M111_OUTFMT_INV_PIX_CLOCK	(1 << 9)
#define MT9M111_OUTFMT_RGB		(1 << 8)
#define MT9M111_OUTFMT_RGB565		(0x0 << 6)
#define MT9M111_OUTFMT_RGB555		(0x1 << 6)
#define MT9M111_OUTFMT_RGB444x		(0x2 << 6)
#define MT9M111_OUTFMT_RGBx444		(0x3 << 6)
#define MT9M111_OUTFMT_TST_RAMP_OFF	(0x0 << 4)
#define MT9M111_OUTFMT_TST_RAMP_COL	(0x1 << 4)
#define MT9M111_OUTFMT_TST_RAMP_ROW	(0x2 << 4)
#define MT9M111_OUTFMT_TST_RAMP_FRAME	(0x3 << 4)
#define MT9M111_OUTFMT_SHIFT_3_UP	(1 << 3)
#define MT9M111_OUTFMT_AVG_CHROMA	(1 << 2)
#define MT9M111_OUTFMT_SWAP_YCbCr_C_Y	(1 << 1)
#define MT9M111_OUTFMT_SWAP_RGB_EVEN	(1 << 1)
#define MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr	(1 << 0)
/*
 * mt9m111: Camera control register addresses (0x200..0x2ff not implemented)
 */

#define reg_read(reg) mt9m111_reg_read(icd, MT9M111_##reg)
#define reg_write(reg, val) mt9m111_reg_write(icd, MT9M111_##reg, (val))
#define reg_set(reg, val) mt9m111_reg_set(icd, MT9M111_##reg, (val))
#define reg_clear(reg, val) mt9m111_reg_clear(icd, MT9M111_##reg, (val))

#define MT9M111_MIN_DARK_ROWS	8
#define MT9M111_MIN_DARK_COLS	24
#define MT9M111_MAX_HEIGHT	1024
#define MT9M111_MAX_WIDTH	1280

#define COL_FMT(_name, _depth, _fourcc, _colorspace) \
	{ .name = _name, .depth = _depth, .fourcc = _fourcc, \
	.colorspace = _colorspace }
#define RGB_FMT(_name, _depth, _fourcc) \
	COL_FMT(_name, _depth, _fourcc, V4L2_COLORSPACE_SRGB)

static const struct soc_camera_data_format mt9m111_colour_formats[] = {
	COL_FMT("YCrYCb 8 bit", 8, V4L2_PIX_FMT_YUYV, V4L2_COLORSPACE_JPEG),
	RGB_FMT("RGB 565", 16, V4L2_PIX_FMT_RGB565),
	RGB_FMT("RGB 555", 16, V4L2_PIX_FMT_RGB555),
	RGB_FMT("Bayer (sRGB) 10 bit", 10, V4L2_PIX_FMT_SBGGR16),
	RGB_FMT("Bayer (sRGB) 8 bit", 8, V4L2_PIX_FMT_SBGGR8),
};

enum mt9m111_context {
	HIGHPOWER = 0,
	LOWPOWER,
};

struct mt9m111 {
	struct i2c_client *client;
	struct soc_camera_device icd;
	int model;	/* V4L2_IDENT_MT9M111* codes from v4l2-chip-ident.h */
	enum mt9m111_context context;
	unsigned int left, top, width, height;
	u32 pixfmt;
	unsigned char autoexposure;
	unsigned char datawidth;
	unsigned int powered:1;
	unsigned int hflip:1;
	unsigned int vflip:1;
	unsigned int swap_rgb_even_odd:1;
	unsigned int swap_rgb_red_blue:1;
	unsigned int swap_yuv_y_chromas:1;
	unsigned int swap_yuv_cb_cr:1;
};

static int reg_page_map_set(struct i2c_client *client, const u16 reg)
{
	int ret;
	u16 page;
	static int lastpage = -1;	/* PageMap cache value */

	page = (reg >> 8);
	if (page == lastpage)
		return 0;
	if (page > 2)
		return -EINVAL;

	ret = i2c_smbus_write_word_data(client, MT9M111_PAGE_MAP, swab16(page));
	if (!ret)
		lastpage = page;
	return ret;
}

static int mt9m111_reg_read(struct soc_camera_device *icd, const u16 reg)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	struct i2c_client *client = mt9m111->client;
	int ret;

	ret = reg_page_map_set(client, reg);
	if (!ret)
		ret = swab16(i2c_smbus_read_word_data(client, (reg & 0xff)));

	dev_dbg(&icd->dev, "read  reg.%03x -> %04x\n", reg, ret);
	return ret;
}

static int mt9m111_reg_write(struct soc_camera_device *icd, const u16 reg,
			     const u16 data)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	struct i2c_client *client = mt9m111->client;
	int ret;

	ret = reg_page_map_set(client, reg);
	if (!ret)
		ret = i2c_smbus_write_word_data(mt9m111->client, (reg & 0xff),
						swab16(data));
	dev_dbg(&icd->dev, "write reg.%03x = %04x -> %d\n", reg, data, ret);
	return ret;
}

static int mt9m111_reg_set(struct soc_camera_device *icd, const u16 reg,
			   const u16 data)
{
	int ret;

	ret = mt9m111_reg_read(icd, reg);
	if (ret >= 0)
		ret = mt9m111_reg_write(icd, reg, ret | data);
	return ret;
}

static int mt9m111_reg_clear(struct soc_camera_device *icd, const u16 reg,
			     const u16 data)
{
	int ret;

	ret = mt9m111_reg_read(icd, reg);
	return mt9m111_reg_write(icd, reg, ret & ~data);
}

static int mt9m111_set_context(struct soc_camera_device *icd,
			       enum mt9m111_context ctxt)
{
	int valB = MT9M111_CTXT_CTRL_RESTART | MT9M111_CTXT_CTRL_DEFECTCOR_B
		| MT9M111_CTXT_CTRL_RESIZE_B | MT9M111_CTXT_CTRL_CTRL2_B
		| MT9M111_CTXT_CTRL_GAMMA_B | MT9M111_CTXT_CTRL_READ_MODE_B
		| MT9M111_CTXT_CTRL_VBLANK_SEL_B
		| MT9M111_CTXT_CTRL_HBLANK_SEL_B;
	int valA = MT9M111_CTXT_CTRL_RESTART;

	if (ctxt == HIGHPOWER)
		return reg_write(CONTEXT_CONTROL, valB);
	else
		return reg_write(CONTEXT_CONTROL, valA);
}

static int mt9m111_setup_rect(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret, is_raw_format;
	int width = mt9m111->width;
	int height = mt9m111->height;

	if ((mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR8)
	    || (mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR16))
		is_raw_format = 1;
	else
		is_raw_format = 0;

	ret = reg_write(COLUMN_START, mt9m111->left);
	if (!ret)
		ret = reg_write(ROW_START, mt9m111->top);

	if (is_raw_format) {
		if (!ret)
			ret = reg_write(WINDOW_WIDTH, width);
		if (!ret)
			ret = reg_write(WINDOW_HEIGHT, height);
	} else {
		if (!ret)
			ret = reg_write(REDUCER_XZOOM_B, MT9M111_MAX_WIDTH);
		if (!ret)
			ret = reg_write(REDUCER_YZOOM_B, MT9M111_MAX_HEIGHT);
		if (!ret)
			ret = reg_write(REDUCER_XSIZE_B, width);
		if (!ret)
			ret = reg_write(REDUCER_YSIZE_B, height);
		if (!ret)
			ret = reg_write(REDUCER_XZOOM_A, MT9M111_MAX_WIDTH);
		if (!ret)
			ret = reg_write(REDUCER_YZOOM_A, MT9M111_MAX_HEIGHT);
		if (!ret)
			ret = reg_write(REDUCER_XSIZE_A, width);
		if (!ret)
			ret = reg_write(REDUCER_YSIZE_A, height);
	}

	return ret;
}

static int mt9m111_setup_pixfmt(struct soc_camera_device *icd, u16 outfmt)
{
	int ret;

	ret = reg_write(OUTPUT_FORMAT_CTRL2_A, outfmt);
	if (!ret)
		ret = reg_write(OUTPUT_FORMAT_CTRL2_B, outfmt);
	return ret;
}

static int mt9m111_setfmt_bayer8(struct soc_camera_device *icd)
{
	return mt9m111_setup_pixfmt(icd, MT9M111_OUTFMT_PROCESSED_BAYER);
}

static int mt9m111_setfmt_bayer10(struct soc_camera_device *icd)
{
	return mt9m111_setup_pixfmt(icd, MT9M111_OUTFMT_BYPASS_IFP);
}

static int mt9m111_setfmt_rgb565(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int val = 0;

	if (mt9m111->swap_rgb_red_blue)
		val |= MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr;
	if (mt9m111->swap_rgb_even_odd)
		val |= MT9M111_OUTFMT_SWAP_RGB_EVEN;
	val |= MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565;

	return mt9m111_setup_pixfmt(icd, val);
}

static int mt9m111_setfmt_rgb555(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int val = 0;

	if (mt9m111->swap_rgb_red_blue)
		val |= MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr;
	if (mt9m111->swap_rgb_even_odd)
		val |= MT9M111_OUTFMT_SWAP_RGB_EVEN;
	val |= MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB555;

	return mt9m111_setup_pixfmt(icd, val);
}

static int mt9m111_setfmt_yuv(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int val = 0;

	if (mt9m111->swap_yuv_cb_cr)
		val |= MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr;
	if (mt9m111->swap_yuv_y_chromas)
		val |= MT9M111_OUTFMT_SWAP_YCbCr_C_Y;

	return mt9m111_setup_pixfmt(icd, val);
}

static int mt9m111_enable(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	struct soc_camera_link *icl = mt9m111->client->dev.platform_data;
	int ret;

	if (icl->power) {
		ret = icl->power(&mt9m111->client->dev, 1);
		if (ret < 0) {
			dev_err(icd->vdev->parent,
				"Platform failed to power-on the camera.\n");
			return ret;
		}
	}

	ret = reg_set(RESET, MT9M111_RESET_CHIP_ENABLE);
	if (!ret)
		mt9m111->powered = 1;
	return ret;
}

static int mt9m111_disable(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	struct soc_camera_link *icl = mt9m111->client->dev.platform_data;
	int ret;

	ret = reg_clear(RESET, MT9M111_RESET_CHIP_ENABLE);
	if (!ret)
		mt9m111->powered = 0;

	if (icl->power)
		icl->power(&mt9m111->client->dev, 0);

	return ret;
}

static int mt9m111_reset(struct soc_camera_device *icd)
{
	int ret;

	ret = reg_set(RESET, MT9M111_RESET_RESET_MODE);
	if (!ret)
		ret = reg_set(RESET, MT9M111_RESET_RESET_SOC);
	if (!ret)
		ret = reg_clear(RESET, MT9M111_RESET_RESET_MODE
				| MT9M111_RESET_RESET_SOC);
	return ret;
}

static int mt9m111_start_capture(struct soc_camera_device *icd)
{
	return 0;
}

static int mt9m111_stop_capture(struct soc_camera_device *icd)
{
	return 0;
}

static unsigned long mt9m111_query_bus_param(struct soc_camera_device *icd)
{
	return SOCAM_MASTER | SOCAM_PCLK_SAMPLE_RISING |
		SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
		SOCAM_DATAWIDTH_8;
}

static int mt9m111_set_bus_param(struct soc_camera_device *icd, unsigned long f)
{
	return 0;
}

static int mt9m111_set_pixfmt(struct soc_camera_device *icd, u32 pixfmt)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret;

	switch (pixfmt) {
	case V4L2_PIX_FMT_SBGGR8:
		ret = mt9m111_setfmt_bayer8(icd);
		break;
	case V4L2_PIX_FMT_SBGGR16:
		ret = mt9m111_setfmt_bayer10(icd);
		break;
	case V4L2_PIX_FMT_RGB555:
		ret = mt9m111_setfmt_rgb555(icd);
		break;
	case V4L2_PIX_FMT_RGB565:
		ret = mt9m111_setfmt_rgb565(icd);
		break;
	case V4L2_PIX_FMT_YUYV:
		ret = mt9m111_setfmt_yuv(icd);
		break;
	default:
		dev_err(&icd->dev, "Pixel format not handled : %x\n", pixfmt);
		ret = -EINVAL;
	}

	if (!ret)
		mt9m111->pixfmt = pixfmt;

	return ret;
}

static int mt9m111_set_fmt_cap(struct soc_camera_device *icd,
			       __u32 pixfmt, struct v4l2_rect *rect)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret;

	mt9m111->left = rect->left;
	mt9m111->top = rect->top;
	mt9m111->width = rect->width;
	mt9m111->height = rect->height;

	dev_dbg(&icd->dev, "%s fmt=%x left=%d, top=%d, width=%d, height=%d\n",
		__func__, pixfmt, mt9m111->left, mt9m111->top, mt9m111->width,
		mt9m111->height);

	ret = mt9m111_setup_rect(icd);
	if (!ret)
		ret = mt9m111_set_pixfmt(icd, pixfmt);
	return ret;
}

static int mt9m111_try_fmt_cap(struct soc_camera_device *icd,
			       struct v4l2_format *f)
{
	if (f->fmt.pix.height > MT9M111_MAX_HEIGHT)
		f->fmt.pix.height = MT9M111_MAX_HEIGHT;
	if (f->fmt.pix.width > MT9M111_MAX_WIDTH)
		f->fmt.pix.width = MT9M111_MAX_WIDTH;

	return 0;
}

static int mt9m111_get_chip_id(struct soc_camera_device *icd,
			       struct v4l2_chip_ident *id)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);