/*
* Driver for IMX074 CMOS Image Sensor from Sony
*
* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* Partially inspired by the IMX074 driver from the Android / MSM tree
*
* 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/v4l2-mediabus.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <media/soc_camera.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-chip-ident.h>
/* IMX074 registers */
#define MODE_SELECT 0x0100
#define IMAGE_ORIENTATION 0x0101
#define GROUPED_PARAMETER_HOLD 0x0104
/* Integration Time */
#define COARSE_INTEGRATION_TIME_HI 0x0202
#define COARSE_INTEGRATION_TIME_LO 0x0203
/* Gain */
#define ANALOGUE_GAIN_CODE_GLOBAL_HI 0x0204
#define ANALOGUE_GAIN_CODE_GLOBAL_LO 0x0205
/* PLL registers */
#define PRE_PLL_CLK_DIV 0x0305
#define PLL_MULTIPLIER 0x0307
#define PLSTATIM 0x302b
#define VNDMY_ABLMGSHLMT 0x300a
#define Y_OPBADDR_START_DI 0x3014
/* mode setting */
#define FRAME_LENGTH_LINES_HI 0x0340
#define FRAME_LENGTH_LINES_LO 0x0341
#define LINE_LENGTH_PCK_HI 0x0342
#define LINE_LENGTH_PCK_LO 0x0343
#define YADDR_START 0x0347
#define YADDR_END 0x034b
#define X_OUTPUT_SIZE_MSB 0x034c
#define X_OUTPUT_SIZE_LSB 0x034d
#define Y_OUTPUT_SIZE_MSB 0x034e
#define Y_OUTPUT_SIZE_LSB 0x034f
#define X_EVEN_INC 0x0381
#define X_ODD_INC 0x0383
#define Y_EVEN_INC 0x0385
#define Y_ODD_INC 0x0387
#define HMODEADD 0x3001
#define VMODEADD 0x3016
#define VAPPLINE_START 0x3069
#define VAPPLINE_END 0x306b
#define SHUTTER 0x3086
#define HADDAVE 0x30e8
#define LANESEL 0x3301
/* IMX074 supported geometry */
#define IMX074_WIDTH 1052
#define IMX074_HEIGHT 780
/* IMX074 has only one fixed colorspace per pixelcode */
struct imx074_datafmt {
enum v4l2_mbus_pixelcode code;
enum v4l2_colorspace colorspace;
};
struct imx074 {
struct v4l2_subdev subdev;
const struct imx074_datafmt *fmt;
};
static const struct imx074_datafmt imx074_colour_fmts[] = {
{V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
};
static struct imx074 *to_imx074(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client), struct imx074, subdev);
}
/* Find a data format by a pixel code in an array */
static const struct imx074_datafmt *imx074_find_datafmt(enum v4l2_mbus_pixelcode code)
{
int i;
for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
if (imx074_colour_fmts[i].code == code)
return imx074_colour_fmts + i;
return NULL;
}
static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
{
struct i2c_adapter *adap = client->adapter;
struct i2c_msg msg;
unsigned char tx[3];
int ret;
msg.addr = client->addr;
msg.buf = tx;
msg.len = 3;
msg.flags = 0;
tx[0] = addr >> 8;
tx[1] = addr & 0xff;
tx[2] = data;
ret = i2c_transfer(adap, &msg, 1);
mdelay(2);
return ret == 1 ? 0 : -EIO;
}
static int reg_read(struct i2c_client *client, const u16 addr)
{
u8 buf[2] = {addr >> 8, addr & 0xff};
int ret;
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = buf,
}, {
.addr = client->addr,
.flags = I2C_M_RD,
.len = 2,
.buf = buf,
},
};
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0) {
dev_warn(&client->dev, "Reading register %x from %x failed\n",
addr, client->addr);
return ret;
}
return buf[0] & 0xff; /* no sign-extension */
}
static int imx074_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);
dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
if (!fmt) {
mf->code = imx074_colour_fmts[0].code;
mf->colorspace = imx074_colour_fmts[0].colorspace;
}
mf->width = IMX074_WIDTH;
mf->height = IMX074_HEIGHT;
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int imx074_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct imx074 *priv = to_imx074(client);
dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
/* MIPI CSI could have changed the format, double-check */
if (!imx074_find_datafmt(mf->code))
return -EINVAL;
imx074_try_fmt(sd, mf);
priv->fmt = imx074_find_datafmt(mf->code);
return 0;
}
static int imx074_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct imx074 *priv = to_imx074(client);
const struct imx074_datafmt *fmt = priv->fmt;
mf->code = fmt->code;
mf->colorspace = fmt->colorspace;
mf->width = IMX074_WIDTH;
mf->height = IMX074_HEIGHT;
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int imx074_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct v4l2_rect *rect = &a->c;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
rect->top = 0;
rect->left = 0;
rect->width = IMX074_WIDTH;
rect->height = IMX074_HEIGHT;
return 0;
}
static int imx074_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = IMX074_WIDTH;
a->bounds.height = IMX074_HEIGHT;
a->defrect = a->bounds;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int imx074_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
enum v4l2_mbus_pixelcode *code)
{
if ((unsigned int)index >= ARRAY_SIZE(imx074_colour_fmts))
return -EINVAL;
*code = imx074_colour_fmts[index].code;
return 0;
}
static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
/* MODE_SELECT: stream or standby */
return reg_write(client, MODE_SELECT, !!enable);
}
static int imx074_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
return -EINVAL;
if (id->match.addr != client->addr)
return -ENODEV;
id->ident = V4L2_IDENT_IMX074;
id->revision = 0;
return 0;
}
static int imx074_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
cfg->type = V4L2_MBUS_CSI2;
cfg->flags = V4L2_MBUS_CSI2_2_LANE |
V4L2_MBUS_CSI2_CHANNEL_0 |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
return 0;
}
static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
.s_stream = imx074_s_stream,
.s_mbus_fmt = imx074_s_fmt,
.g_mbus_fmt = imx074_g_fmt,
.try_mbus_fmt = imx074_try_fmt,
.enum_mbus_fmt = imx074_enum_fmt,
.g_crop = imx074_g_crop,
.cropcap = imx074_cropcap,
.g_mbus_config = imx074_g_mbus_config,
};
static struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
.g_chip_ident = imx074_g_chip_ident,
};
static struct v4l2_subdev_ops imx074_subdev_ops = {
.core = &imx074_subdev_core_ops,
.video = &imx074_subdev_video_ops,
};
static int imx074_video_probe(struct i2c_client *client)
{
int ret;
u16 id;
/* Read sensor Model ID */
ret = reg_read(client, 0);
if (ret < 0)
return ret;
id = ret << 8;
ret = reg_read(client, 1);
if (ret < 0)
return ret;
id |= ret;
dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
if (id != 0x74)
return -ENODEV;
/* PLL Setting EXTCLK=24MHz, 22.5times */
reg_write(client, PLL_MULTIPLIER, 0x2D);
reg_write(client, PRE_PLL_CLK_DIV, 0x02);
reg_write(client, PLSTATIM, 0x4B);
/* 2-lane mode */
reg_write(client, 0x3024, 0x00);
reg_write(client, IMAGE_ORIENTATION, 0x00);
/* select RAW mode:
* 0x08+0x08 = top 8 bits
* 0x0a+0x08 = compressed 8-bits
* 0x0a+0x0a = 10 bits
*/
reg_write(client, 0x0112, 0x08);
reg_write(client, 0x0113, 0x08);
/* Base setting for High frame mode */
reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
reg_write(client, Y_OPBADDR_START_DI, 0x08);
reg_write(client, 0x3015, 0x37);
reg_write(client, 0x301C, 0x01);
reg_write(client, 0x302C, 0x05);
reg_write(client, 0x3031, 0x26);
reg_write(client, 0x3041, 0x60);
reg_write(client, 0x3051, 0x24);
reg_write(client, 0x3053, 0x34);
reg_write(client, 0x3057, 0xC0);
reg_write(client, 0x305C, 0x09);
reg_write(client, 0x305D, 0x07);
reg_write(client, 0x3060, 0x30);
reg_write(client, 0x3065, 0x00);
reg_write(client, 0x30AA, 0x08);
reg_write(client, 0x30AB, 0x1C);
reg_write(client, 0x30B0, 0x32);
reg_write(client, 0x30B2, 0x83);
reg_write(client, 0x30D3, 0x04);
reg_write(client, 0x3106, 0x78);
reg_write(client, 0x310C, 0x82);
reg_write(client, 0x3304, 0x05);
reg_write(client, 0x3305, 0x04);
reg_write(client, 0x3306, 0x11);
reg_write(client, 0x3307, 0x02);
reg_write(client, 0x3308, 0x0C);
reg_write(client, 0x3309, 0x06);
reg_write(client, 0x330A, 0x08);
reg_write(client, 0x330B, 0x04);
reg_write(client, 0x330C, 0x08);
reg_write(client, 0x330D, 0x06);
reg_write(client, 0x330E, 0x01);
reg_write(client, 0x3381, 0x00);
/* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
/* 1608 = 1560 + 48 (black lines) */
reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
reg_write(client, YADDR_START, 0x00);
reg_write(client, YADDR_END, 0x2F);
/* 0x838 == 2104 */
reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
/* 0x618 == 1560 */
reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
reg_write(client, X_EVEN_INC, 0x01);
reg_write(client, X_ODD_INC, 0x03);
reg_write(client, Y_EVEN_INC, 0x01);
reg_write(client, Y_ODD_INC, 0x03);
reg_write(client, HMODEADD, 0x00);
reg_write(client, VMODEADD, 0x16);
reg_write(client, VAPPLINE_START, 0x24);
reg_write(client, VAPPLINE_END, 0x53);
reg_write(client, SHUTTER, 0x00);
reg_write(client, HADDAVE, 0x80);
reg_write(client, LANESEL, 0x00);
reg_write(client, GROUPED_PARAMETER_HOLD, 0x00); /* off */
return 0;
}
static int imx074_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct imx074 *priv;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
int ret;
if (!icl) {
dev_err(&client->dev, "IMX074: missing platform data!\n");
return -EINVAL;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_warn(&adapter->dev,
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
return -EIO;
}
priv = kzalloc(sizeof(struct imx074), GFP_KERNEL);
if (!priv)
return -ENOMEM;
v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);
priv->fmt = &imx074_colour_fmts[0];
ret = imx074_video_probe(client);
if (ret < 0) {
kfree(priv);
return ret;
}
return ret;
}
static int imx074_remove(struct i2c_client *client)
{
struct imx074 *priv = to_imx074(client);
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
if (icl->free_bus)
icl->free_bus(icl);
kfree(priv);
return 0;
}
static const struct i2c_device_id imx074_id[] = {
{ "imx074", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, imx074_id);
static struct i2c_driver imx074_i2c_driver = {
.driver = {
.name = "imx074",
},
.probe = imx074_probe,
.remove = imx074_remove,
.id_table = imx074_id,
};
module_i2c_driver(imx074_i2c_driver);
MODULE_DESCRIPTION("Sony IMX074 Camera driver");
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_LICENSE("GPL v2");
