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ov965x.c
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ov965x.c
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/* linux/drivers/media/video/ov965x.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* Driver for OV965X (UXGA camera) from Samsung Electronics
* 1/4" 2.0Mp CMOS Image Sensor SoC with an Embedded Image Processor
*
* 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/i2c.h>
#include <linux/delay.h>
#include <linux/version.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-i2c-drv.h>
#include <media/ov9650_platform.h>
#ifdef CONFIG_VIDEO_SAMSUNG_V4L2
#include <linux/videodev2_samsung.h>
#endif
#include "ov965x.h"
#define OV965X_DRIVER_NAME "ov9650"
/* Default resolution & pixelformat. plz ref ov9650_platform.h */
#define DEFAULT_RES WVGA /* Index of resoultion */
#define DEFAUT_FPS_INDEX OV965X_15FPS
#define DEFAULT_FMT V4L2_PIX_FMT_UYVY /* YUV422 */
/*
* Specification
* Parallel : ITU-R. 656/601 YUV422, RGB565, RGB888 (Up to VGA), RAW10
* Serial : MIPI CSI2 (single lane) YUV422, RGB565, RGB888 (Up to VGA), RAW10
* Resolution : 1280 (H) x 1024 (V)
* Image control : Brightness, Contrast, Saturation, Sharpness, Glamour
* Effect : Mono, Negative, Sepia, Aqua, Sketch
* FPS : 15fps @full resolution, 30fps @VGA, 24fps @720p
* Max. pixel clock frequency : 48MHz(upto)
* Internal PLL (6MHz to 27MHz input frequency)
*/
static int ov965x_init(struct v4l2_subdev *sd, u32 val);
/* Camera functional setting values configured by user concept */
struct ov965x_userset {
signed int exposure_bias; /* V4L2_CID_EXPOSURE */
unsigned int ae_lock;
unsigned int awb_lock;
unsigned int auto_wb; /* V4L2_CID_CAMERA_WHITE_BALANCE */
unsigned int manual_wb; /* V4L2_CID_WHITE_BALANCE_PRESET */
unsigned int wb_temp; /* V4L2_CID_WHITE_BALANCE_TEMPERATURE */
unsigned int effect; /* Color FX (AKA Color tone) */
unsigned int contrast; /* V4L2_CID_CAMERA_CONTRAST */
unsigned int saturation; /* V4L2_CID_CAMERA_SATURATION */
unsigned int sharpness; /* V4L2_CID_CAMERA_SHARPNESS */
unsigned int glamour;
};
struct ov965x_state {
struct ov9650_platform_data *pdata;
struct v4l2_subdev sd;
struct v4l2_pix_format pix;
struct v4l2_fract timeperframe;
struct ov965x_userset userset;
int framesize_index;
int freq; /* MCLK in KHz */
int is_mipi;
int isize;
int ver;
int fps;
int check_previewdata;
};
enum {
OV965X_PREVIEW_SVGA,
};
struct ov965x_enum_framesize {
unsigned int index;
unsigned int width;
unsigned int height;
};
struct ov965x_enum_framesize ov965x_framesize_list[] = {
// { OV965X_PREVIEW_SVGA, 800, 600 }
{ OV965X_PREVIEW_SVGA, 640, 480 }
};
static inline struct ov965x_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct ov965x_state, sd);
}
static int ov965x_reset(struct v4l2_subdev *sd)
{
return ov965x_init(sd, 0);
}
/*
* OV965X register structure : 2bytes address, 2bytes value
* retry on write failure up-to 5 times
*/
static inline int ov965x_write(struct v4l2_subdev *sd, u8 addr, u8 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct i2c_msg msg[1];
unsigned char reg[2];
int err = 0;
int retry = 0;
if (!client->adapter)
return -ENODEV;
again:
msg->addr = client->addr;
msg->flags = 0;
msg->len = 2;
msg->buf = reg;
reg[0] = addr & 0xff;
reg[1] = val & 0xff;
err = i2c_transfer(client->adapter, msg, 1);
if (err >= 0)
return err; /* Returns here on success */
/* abnormal case: retry 5 times */
if (retry < 5) {
dev_err(&client->dev, "%s: address: 0x%02x%02x, "
"value: 0x%02x%02x\n", __func__,
reg[0], reg[1], reg[2], reg[3]);
retry++;
goto again;
}
return err;
}
static int ov965x_i2c_write(struct v4l2_subdev *sd, unsigned char i2c_data[],
unsigned char length)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
unsigned char buf[length], i;
struct i2c_msg msg = {client->addr, 0, length, buf};
for (i = 0; i < length; i++)
buf[i] = i2c_data[i];
return i2c_transfer(client->adapter, &msg, 1) == 1 ? 0 : -EIO;
}
static int ov965x_write_regs(struct v4l2_subdev *sd, unsigned char regs[],
int size)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int i, err;
for (i = 0; i < size; i++) {
err = ov965x_i2c_write(sd, ®s[i], sizeof(regs[i]));
if (err < 0)
v4l_info(client, "%s: register set failed\n", __func__);
}
return 0;
}
static const char *ov965x_querymenu_wb_preset[] = {
"WB Tungsten", "WB Fluorescent", "WB sunny", "WB cloudy", NULL
};
static const char *ov965x_querymenu_effect_mode[] = {
"Effect Sepia", "Effect Aqua", "Effect Monochrome",
"Effect Negative", "Effect Sketch", NULL
};
static const char *ov965x_querymenu_ev_bias_mode[] = {
"-3EV", "-2,1/2EV", "-2EV", "-1,1/2EV",
"-1EV", "-1/2EV", "0", "1/2EV",
"1EV", "1,1/2EV", "2EV", "2,1/2EV",
"3EV", NULL
};
static struct v4l2_queryctrl ov965x_controls[] = {
{
/*
* For now, we just support in preset type
* to be close to generic WB system,
* we define color temp range for each preset
*/
.id = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "White balance in kelvin",
.minimum = 0,
.maximum = 10000,
.step = 1,
.default_value = 0, /* FIXME */
},
{
.id = V4L2_CID_WHITE_BALANCE_PRESET,
.type = V4L2_CTRL_TYPE_MENU,
.name = "White balance preset",
.minimum = 0,
.maximum = ARRAY_SIZE(ov965x_querymenu_wb_preset) - 2,
.step = 1,
.default_value = 0,
},
{
.id = V4L2_CID_CAMERA_WHITE_BALANCE,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Auto white balance",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
},
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_MENU,
.name = "Exposure bias",
.minimum = 0,
.maximum = ARRAY_SIZE(ov965x_querymenu_ev_bias_mode) - 2,
.step = 1,
.default_value =
(ARRAY_SIZE(ov965x_querymenu_ev_bias_mode) - 2) / 2,
/* 0 EV */
},
{
.id = V4L2_CID_CAMERA_EFFECT,
.type = V4L2_CTRL_TYPE_MENU,
.name = "Image Effect",
.minimum = 0,
.maximum = ARRAY_SIZE(ov965x_querymenu_effect_mode) - 2,
.step = 1,
.default_value = 0,
},
{
.id = V4L2_CID_CAMERA_CONTRAST,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Contrast",
.minimum = 0,
.maximum = 4,
.step = 1,
.default_value = 2,
},
{
.id = V4L2_CID_CAMERA_SATURATION,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Saturation",
.minimum = 0,
.maximum = 4,
.step = 1,
.default_value = 2,
},
{
.id = V4L2_CID_CAMERA_SHARPNESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Sharpness",
.minimum = 0,
.maximum = 4,
.step = 1,
.default_value = 2,
},
};
const char **ov965x_ctrl_get_menu(u32 id)
{
switch (id) {
case V4L2_CID_WHITE_BALANCE_PRESET:
return ov965x_querymenu_wb_preset;
case V4L2_CID_CAMERA_EFFECT:
return ov965x_querymenu_effect_mode;
case V4L2_CID_EXPOSURE:
return ov965x_querymenu_ev_bias_mode;
default:
return v4l2_ctrl_get_menu(id);
}
}
static inline struct v4l2_queryctrl const *ov965x_find_qctrl(int id)
{
int i;
for (i = 0; i < ARRAY_SIZE(ov965x_controls); i++)
if (ov965x_controls[i].id == id)
return &ov965x_controls[i];
return NULL;
}
static int ov965x_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
int i;
for (i = 0; i < ARRAY_SIZE(ov965x_controls); i++) {
if (ov965x_controls[i].id == qc->id) {
memcpy(qc, &ov965x_controls[i],
sizeof(struct v4l2_queryctrl));
return 0;
}
}
return -EINVAL;
}
static int ov965x_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
{
struct v4l2_queryctrl qctrl;
qctrl.id = qm->id;
ov965x_queryctrl(sd, &qctrl);
return v4l2_ctrl_query_menu(qm, &qctrl, ov965x_ctrl_get_menu(qm->id));
}
static int ov965x_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
int err = 0;
return err;
}
static int ov965x_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
int err = 0;
return err;
}
static int ov965x_enum_framesizes(struct v4l2_subdev *sd,
struct v4l2_frmsizeenum *fsize)
{
struct ov965x_state *state = to_state(sd);
int num_entries = sizeof(ov965x_framesize_list) /
sizeof(struct ov965x_enum_framesize);
struct ov965x_enum_framesize *elem;
int index = 0;
int i = 0;
/* The camera interface should read this value, this is the resolution
* at which the sensor would provide framedata to the camera i/f
*
* In case of image capture,
* this returns the default camera resolution (WVGA)
*/
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
index = state->framesize_index;
for (i = 0; i < num_entries; i++) {
elem = &ov965x_framesize_list[i];
if (elem->index == index) {
fsize->discrete.width =
ov965x_framesize_list[index].width;
fsize->discrete.height =
ov965x_framesize_list[index].height;
return 0;
}
}
return -EINVAL;
}
static int ov965x_enum_frameintervals(struct v4l2_subdev *sd,
struct v4l2_frmivalenum *fival)
{
int err = 0;
return err;
}
static int ov965x_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmtdesc)
{
int err = 0;
return err;
}
static int ov965x_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
int err = 0;
return err;
}
static int ov965x_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *param)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int err = 0;
dev_dbg(&client->dev, "%s\n", __func__);
return err;
}
static int ov965x_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *param)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int err = 0;
dev_dbg(&client->dev, "%s: numerator %d, denominator: %d\n",
__func__, param->parm.capture.timeperframe.numerator,
param->parm.capture.timeperframe.denominator);
return err;
}
static int ov965x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov965x_state *state = to_state(sd);
struct ov965x_userset userset = state->userset;
int err = 0;
switch (ctrl->id) {
case V4L2_CID_CAMERA_WHITE_BALANCE:
ctrl->value = userset.auto_wb;
break;
case V4L2_CID_WHITE_BALANCE_PRESET:
ctrl->value = userset.manual_wb;
break;
case V4L2_CID_CAMERA_EFFECT:
ctrl->value = userset.effect;
break;
case V4L2_CID_CAMERA_CONTRAST:
ctrl->value = userset.contrast;
break;
case V4L2_CID_CAMERA_SATURATION:
ctrl->value = userset.saturation;
break;
case V4L2_CID_CAMERA_SHARPNESS:
ctrl->value = userset.saturation;
break;
case V4L2_CID_CAM_JPEG_MAIN_SIZE:
case V4L2_CID_CAM_JPEG_MAIN_OFFSET:
case V4L2_CID_CAM_JPEG_THUMB_SIZE:
case V4L2_CID_CAM_JPEG_THUMB_OFFSET:
case V4L2_CID_CAM_JPEG_POSTVIEW_OFFSET:
case V4L2_CID_CAM_JPEG_MEMSIZE:
case V4L2_CID_CAM_JPEG_QUALITY:
case V4L2_CID_CAMERA_AUTO_FOCUS_RESULT:
case V4L2_CID_CAM_DATE_INFO_YEAR:
case V4L2_CID_CAM_DATE_INFO_MONTH:
case V4L2_CID_CAM_DATE_INFO_DATE:
case V4L2_CID_CAM_SENSOR_VER:
case V4L2_CID_CAM_FW_MINOR_VER:
case V4L2_CID_CAM_FW_MAJOR_VER:
case V4L2_CID_CAM_PRM_MINOR_VER:
case V4L2_CID_CAM_PRM_MAJOR_VER:
case V4L2_CID_ESD_INT:
case V4L2_CID_CAMERA_GET_ISO:
case V4L2_CID_CAMERA_GET_SHT_TIME:
case V4L2_CID_CAMERA_OBJ_TRACKING_STATUS:
case V4L2_CID_CAMERA_SMART_AUTO_STATUS:
ctrl->value = 0;
break;
case V4L2_CID_EXPOSURE:
ctrl->value = userset.exposure_bias;
break;
default:
dev_err(&client->dev, "%s: no such ctrl\n", __func__);
/* err = -EINVAL; */
break;
}
return err;
}
static int ov965x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov965x_state *state = to_state(sd);
int err = 0;
int value = ctrl->value;
switch (ctrl->id) {
case V4L2_CID_CAMERA_FLASH_MODE:
case V4L2_CID_CAMERA_BRIGHTNESS:
break;
case V4L2_CID_CAMERA_WHITE_BALANCE:
dev_dbg(&client->dev, "%s: V4L2_CID_CAMERA_WHITE_BALANCE\n",
__func__);
if (value <= WHITE_BALANCE_AUTO) {
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_awb_enable[value],
sizeof(ov965x_regs_awb_enable[value]));
} else {
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_wb_preset[value-2],
sizeof(ov965x_regs_wb_preset[value-2]));
}
break;
case V4L2_CID_CAMERA_EFFECT:
dev_dbg(&client->dev, "%s: V4L2_CID_CAMERA_EFFECT\n", __func__);
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_color_effect[value-1],
sizeof(ov965x_regs_color_effect[value-1]));
break;
case V4L2_CID_CAMERA_ISO:
case V4L2_CID_CAMERA_METERING:
break;
case V4L2_CID_CAMERA_CONTRAST:
dev_dbg(&client->dev, "%s: V4L2_CID_CAMERA_CONTRAST\n", __func__);
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_contrast_bias[value],
sizeof(ov965x_regs_contrast_bias[value]));
break;
case V4L2_CID_CAMERA_SATURATION:
dev_dbg(&client->dev, "%s: V4L2_CID_CAMERA_SATURATION\n", __func__);
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_saturation_bias[value],
sizeof(ov965x_regs_saturation_bias[value]));
break;
case V4L2_CID_CAMERA_SHARPNESS:
dev_dbg(&client->dev, "%s: V4L2_CID_CAMERA_SHARPNESS\n", __func__);
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_sharpness_bias[value],
sizeof(ov965x_regs_sharpness_bias[value]));
break;
case V4L2_CID_CAMERA_WDR:
case V4L2_CID_CAMERA_FACE_DETECTION:
case V4L2_CID_CAMERA_FOCUS_MODE:
case V4L2_CID_CAM_JPEG_QUALITY:
case V4L2_CID_CAMERA_SCENE_MODE:
case V4L2_CID_CAMERA_GPS_LATITUDE:
case V4L2_CID_CAMERA_GPS_LONGITUDE:
case V4L2_CID_CAMERA_GPS_TIMESTAMP:
case V4L2_CID_CAMERA_GPS_ALTITUDE:
case V4L2_CID_CAMERA_OBJECT_POSITION_X:
case V4L2_CID_CAMERA_OBJECT_POSITION_Y:
case V4L2_CID_CAMERA_SET_AUTO_FOCUS:
case V4L2_CID_CAMERA_FRAME_RATE:
break;
case V4L2_CID_CAM_PREVIEW_ONOFF:
if (state->check_previewdata == 0)
err = 0;
else
err = -EIO;
break;
case V4L2_CID_CAMERA_CHECK_DATALINE:
case V4L2_CID_CAMERA_CHECK_DATALINE_STOP:
break;
case V4L2_CID_CAMERA_RESET:
dev_dbg(&client->dev, "%s: V4L2_CID_CAMERA_RESET\n", __func__);
err = ov965x_reset(sd);
break;
case V4L2_CID_EXPOSURE:
dev_dbg(&client->dev, "%s: V4L2_CID_EXPOSURE\n", __func__);
err = ov965x_write_regs(sd,
(unsigned char *) ov965x_regs_ev_bias[value],
sizeof(ov965x_regs_ev_bias[value]));
break;
default:
dev_err(&client->dev, "%s: no such control\n", __func__);
/* err = -EINVAL; */
break;
}
if (err < 0)
dev_dbg(&client->dev, "%s: vidioc_s_ctrl failed\n", __func__);
return err;
}
static int ov965x_init(struct v4l2_subdev *sd, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov965x_state *state = to_state(sd);
int err = -EINVAL, i;
v4l_info(client, "%s: camera initialization start\n", __func__);
for (i = 0; i < OV965X_INIT_REGS; i++) {
err = ov965x_i2c_write(sd, ov965x_init_reg[i],
sizeof(ov965x_init_reg[i]));
if (err < 0)
v4l_info(client, "%s: register set failed\n", __func__);
}
if (err < 0) {
/* This is preview fail */
state->check_previewdata = 100;
v4l_err(client,
"%s: camera initialization failed. err(%d)\n",
__func__, state->check_previewdata);
return -EIO;
}
/* This is preview success */
state->check_previewdata = 0;
return 0;
}
/*
* s_config subdev ops
* With camera device, we need to re-initialize every single opening time
* therefor, it is not necessary to be initialized on probe time.
* except for version checking.
* NOTE: version checking is optional
*/
static int ov965x_s_config(struct v4l2_subdev *sd, int irq, void *platform_data)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov965x_state *state = to_state(sd);
struct ov9650_platform_data *pdata;
dev_info(&client->dev, "fetching platform data\n");
pdata = client->dev.platform_data;
if (!pdata) {
dev_err(&client->dev, "%s: no platform data\n", __func__);
return -ENODEV;
}
/*
* Assign default format and resolution
* Use configured default information in platform data
* or without them, use default information in driver
*/
if (!(pdata->default_width && pdata->default_height)) {
/* TODO: assign driver default resolution */
} else {
state->pix.width = pdata->default_width;
state->pix.height = pdata->default_height;
}
if (!pdata->pixelformat)
state->pix.pixelformat = DEFAULT_FMT;
else
state->pix.pixelformat = pdata->pixelformat;
if (!pdata->freq)
state->freq = 24000000; /* 24MHz default */
else
state->freq = pdata->freq;
if (!pdata->is_mipi) {
state->is_mipi = 0;
dev_info(&client->dev, "parallel mode\n");
} else
state->is_mipi = pdata->is_mipi;
return 0;
}
static const struct v4l2_subdev_core_ops ov965x_core_ops = {
.init = ov965x_init, /* initializing API */
.s_config = ov965x_s_config, /* Fetch platform data */
.queryctrl = ov965x_queryctrl,
.querymenu = ov965x_querymenu,
.g_ctrl = ov965x_g_ctrl,
.s_ctrl = ov965x_s_ctrl,
};
static const struct v4l2_subdev_video_ops ov965x_video_ops = {
.g_fmt = ov965x_g_fmt,
.s_fmt = ov965x_s_fmt,
.enum_framesizes = ov965x_enum_framesizes,
.enum_frameintervals = ov965x_enum_frameintervals,
.enum_fmt = ov965x_enum_fmt,
.try_fmt = ov965x_try_fmt,
.g_parm = ov965x_g_parm,
.s_parm = ov965x_s_parm,
};
static const struct v4l2_subdev_ops ov965x_ops = {
.core = &ov965x_core_ops,
.video = &ov965x_video_ops,
};
/*
* ov965x_probe
* Fetching platform data is being done with s_config subdev call.
* In probe routine, we just register subdev device
*/
static int ov965x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ov965x_state *state;
struct v4l2_subdev *sd;
state = kzalloc(sizeof(struct ov965x_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;
strcpy(sd->name, OV965X_DRIVER_NAME);
/* Registering subdev */
v4l2_i2c_subdev_init(sd, client, &ov965x_ops);
dev_info(&client->dev, "ov965x has been probed\n");
return 0;
}
static int ov965x_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
kfree(to_state(sd));
return 0;
}
static const struct i2c_device_id ov965x_id[] = {
{ OV965X_DRIVER_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, ov965x_id);
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = OV965X_DRIVER_NAME,
.probe = ov965x_probe,
.remove = __devexit_p(ov965x_remove),
.id_table = ov965x_id,
};
MODULE_AUTHOR("Figo Wang <[email protected]>");
MODULE_DESCRIPTION("OV965X video decoder driver");
MODULE_LICENSE("GPL");