- 根目录:
- drivers
- media
- i2c
- sr030pc30.c
/*
* Driver for SiliconFile SR030PC30 VGA (1/10-Inch) Image Sensor with ISP
*
* Copyright (C) 2010 Samsung Electronics Co., Ltd
* Author: Sylwester Nawrocki, s.nawrocki@samsung.com
*
* Based on original driver authored by Dongsoo Nathaniel Kim
* and HeungJun Kim <riverful.kim@samsung.com>.
*
* Based on mt9v011 Micron Digital Image Sensor driver
* Copyright (c) 2009 Mauro Carvalho Chehab
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-mediabus.h>
#include <media/v4l2-ctrls.h>
#include <media/sr030pc30.h>
static int debug;
module_param(debug, int, 0644);
#define MODULE_NAME "SR030PC30"
/*
* Register offsets within a page
* b15..b8 - page id, b7..b0 - register address
*/
#define POWER_CTRL_REG 0x0001
#define PAGEMODE_REG 0x03
#define DEVICE_ID_REG 0x0004
#define NOON010PC30_ID 0x86
#define SR030PC30_ID 0x8C
#define VDO_CTL1_REG 0x0010
#define SUBSAMPL_NONE_VGA 0
#define SUBSAMPL_QVGA 0x10
#define SUBSAMPL_QQVGA 0x20
#define VDO_CTL2_REG 0x0011
#define SYNC_CTL_REG 0x0012
#define WIN_ROWH_REG 0x0020
#define WIN_ROWL_REG 0x0021
#define WIN_COLH_REG 0x0022
#define WIN_COLL_REG 0x0023
#define WIN_HEIGHTH_REG 0x0024
#define WIN_HEIGHTL_REG 0x0025
#define WIN_WIDTHH_REG 0x0026
#define WIN_WIDTHL_REG 0x0027
#define HBLANKH_REG 0x0040
#define HBLANKL_REG 0x0041
#define VSYNCH_REG 0x0042
#define VSYNCL_REG 0x0043
/* page 10 */
#define ISP_CTL_REG(n) (0x1010 + (n))
#define YOFS_REG 0x1040
#define DARK_YOFS_REG 0x1041
#define AG_ABRTH_REG 0x1050
#define SAT_CTL_REG 0x1060
#define BSAT_REG 0x1061
#define RSAT_REG 0x1062
#define AG_SAT_TH_REG 0x1063
/* page 11 */
#define ZLPF_CTRL_REG 0x1110
#define ZLPF_CTRL2_REG 0x1112
#define ZLPF_AGH_THR_REG 0x1121
#define ZLPF_THR_REG 0x1160
#define ZLPF_DYN_THR_REG 0x1160
/* page 12 */
#define YCLPF_CTL1_REG 0x1240
#define YCLPF_CTL2_REG 0x1241
#define YCLPF_THR_REG 0x1250
#define BLPF_CTL_REG 0x1270
#define BLPF_THR1_REG 0x1274
#define BLPF_THR2_REG 0x1275
/* page 14 - Lens Shading Compensation */
#define LENS_CTRL_REG 0x1410
#define LENS_XCEN_REG 0x1420
#define LENS_YCEN_REG 0x1421
#define LENS_R_COMP_REG 0x1422
#define LENS_G_COMP_REG 0x1423
#define LENS_B_COMP_REG 0x1424
/* page 15 - Color correction */
#define CMC_CTL_REG 0x1510
#define CMC_OFSGH_REG 0x1514
#define CMC_OFSGL_REG 0x1516
#define CMC_SIGN_REG 0x1517
/* Color correction coefficients */
#define CMC_COEF_REG(n) (0x1530 + (n))
/* Color correction offset coefficients */
#define CMC_OFS_REG(n) (0x1540 + (n))
/* page 16 - Gamma correction */
#define GMA_CTL_REG 0x1610
/* Gamma correction coefficients 0.14 */
#define GMA_COEF_REG(n) (0x1630 + (n))
/* page 20 - Auto Exposure */
#define AE_CTL1_REG 0x2010
#define AE_CTL2_REG 0x2011
#define AE_FRM_CTL_REG 0x2020
#define AE_FINE_CTL_REG(n) (0x2028 + (n))
#define EXP_TIMEH_REG 0x2083
#define EXP_TIMEM_REG 0x2084
#define EXP_TIMEL_REG 0x2085
#define EXP_MMINH_REG 0x2086
#define EXP_MMINL_REG 0x2087
#define EXP_MMAXH_REG 0x2088
#define EXP_MMAXM_REG 0x2089
#define EXP_MMAXL_REG 0x208A
/* page 22 - Auto White Balance */
#define AWB_CTL1_REG 0x2210
#define AWB_ENABLE 0x80
#define AWB_CTL2_REG 0x2211
#define MWB_ENABLE 0x01
/* RGB gain control (manual WB) when AWB_CTL1[7]=0 */
#define AWB_RGAIN_REG 0x2280
#define AWB_GGAIN_REG 0x2281
#define AWB_BGAIN_REG 0x2282
#define AWB_RMAX_REG 0x2283
#define AWB_RMIN_REG 0x2284
#define AWB_BMAX_REG 0x2285
#define AWB_BMIN_REG 0x2286
/* R, B gain range in bright light conditions */
#define AWB_RMAXB_REG 0x2287
#define AWB_RMINB_REG 0x2288
#define AWB_BMAXB_REG 0x2289
#define AWB_BMINB_REG 0x228A
/* manual white balance, when AWB_CTL2[0]=1 */
#define MWB_RGAIN_REG 0x22B2
#define MWB_BGAIN_REG 0x22B3
/* the token to mark an array end */
#define REG_TERM 0xFFFF
/* Minimum and maximum exposure time in ms */
#define EXPOS_MIN_MS 1
#define EXPOS_MAX_MS 125
struct sr030pc30_info {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
const struct sr030pc30_platform_data *pdata;
const struct sr030pc30_format *curr_fmt;
const struct sr030pc30_frmsize *curr_win;
unsigned int hflip:1;
unsigned int vflip:1;
unsigned int sleep:1;
struct {
/* auto whitebalance control cluster */
struct v4l2_ctrl *awb;
struct v4l2_ctrl *red;
struct v4l2_ctrl *blue;
};
struct {
/* auto exposure control cluster */
struct v4l2_ctrl *autoexp;
struct v4l2_ctrl *exp;
};
u8 i2c_reg_page;
};
struct sr030pc30_format {
u32 code;
enum v4l2_colorspace colorspace;
u16 ispctl1_reg;
};
struct sr030pc30_frmsize {
u16 width;
u16 height;
int vid_ctl1;
};
struct i2c_regval {
u16 addr;
u16 val;
};
/* supported resolutions */
static const struct sr030pc30_frmsize sr030pc30_sizes[] = {
{
.width = 640,
.height = 480,
.vid_ctl1 = SUBSAMPL_NONE_VGA,
}, {
.width = 320,
.height = 240,
.vid_ctl1 = SUBSAMPL_QVGA,
}, {
.width = 160,
.height = 120,
.vid_ctl1 = SUBSAMPL_QQVGA,
},
};
/* supported pixel formats */
static const struct sr030pc30_format sr030pc30_formats[] = {
{
.code = MEDIA_BUS_FMT_YUYV8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.ispctl1_reg = 0x03,
}, {
.code = MEDIA_BUS_FMT_YVYU8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.ispctl1_reg = 0x02,
}, {
.code = MEDIA_BUS_FMT_VYUY8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.ispctl1_reg = 0,
}, {
.code = MEDIA_BUS_FMT_UYVY8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.ispctl1_reg = 0x01,
}, {
.code = MEDIA_BUS_FMT_RGB565_2X8_BE,
.colorspace = V4L2_COLORSPACE_JPEG,
.ispctl1_reg = 0x40,
},
};
static const struct i2c_regval sr030pc30_base_regs[] = {
/* Window size and position within pixel matrix */
{ WIN_ROWH_REG, 0x00 }, { WIN_ROWL_REG, 0x06 },
{ WIN_COLH_REG, 0x00 }, { WIN_COLL_REG, 0x06 },
{ WIN_HEIGHTH_REG, 0x01 }, { WIN_HEIGHTL_REG, 0xE0 },
{ WIN_WIDTHH_REG, 0x02 }, { WIN_WIDTHL_REG, 0x80 },
{ HBLANKH_REG, 0x01 }, { HBLANKL_REG, 0x50 },
{ VSYNCH_REG, 0x00 }, { VSYNCL_REG, 0x14 },
{ SYNC_CTL_REG, 0 },
/* Color corection and saturation */
{ ISP_CTL_REG(0), 0x30 }, { YOFS_REG, 0x80 },
{ DARK_YOFS_REG, 0x04 }, { AG_ABRTH_REG, 0x78 },
{ SAT_CTL_REG, 0x1F }, { BSAT_REG, 0x90 },
{ AG_SAT_TH_REG, 0xF0 }, { 0x1064, 0x80 },
{ CMC_CTL_REG, 0x03 }, { CMC_OFSGH_REG, 0x3C },
{ CMC_OFSGL_REG, 0x2C }, { CMC_SIGN_REG, 0x2F },
{ CMC_COEF_REG(0), 0xCB }, { CMC_OFS_REG(0), 0x87 },
{ CMC_COEF_REG(1), 0x61 }, { CMC_OFS_REG(1), 0x18 },
{ CMC_COEF_REG(2), 0x16 }, { CMC_OFS_REG(2), 0x91 },
{ CMC_COEF_REG(3), 0x23 }, { CMC_OFS_REG(3), 0x94 },
{ CMC_COEF_REG(4), 0xCE }, { CMC_OFS_REG(4), 0x9f },
{ CMC_COEF_REG(5), 0x2B }, { CMC_OFS_REG(5), 0x33 },
{ CMC_COEF_REG(6), 0x01 }, { CMC_OFS_REG(6), 0x00 },
{ CMC_COEF_REG(7), 0x34 }, { CMC_OFS_REG(7), 0x94 },
{ CMC_COEF_REG(8), 0x75 }, { CMC_OFS_REG(8), 0x14 },
/* Color corection coefficients */
{ GMA_CTL_REG, 0x03 }, { GMA_COEF_REG(0), 0x00 },
{ GMA_COEF_REG(1), 0x19 }, { GMA_COEF_REG(2), 0x26 },
{ GMA_COEF_REG(3), 0x3B }, { GMA_COEF_REG(4), 0x5D },
{ GMA_COEF_REG(5), 0x79 }, { GMA_COEF_REG(6), 0x8E },
{ GMA_COEF_REG(7), 0x9F }, { GMA_COEF_REG(8), 0xAF },
{ GMA_COEF_REG(9), 0xBD }, { GMA_COEF_REG(10), 0xCA },
{ GMA_COEF_REG(11), 0xDD }, { GMA_COEF_REG(12), 0xEC },
{ GMA_COEF_REG(13), 0xF7 }, { GMA_COEF_REG(14), 0xFF },
/* Noise reduction, Z-LPF, YC-LPF and BLPF filters setup */
{ ZLPF_CTRL_REG, 0x99 }, { ZLPF_CTRL2_REG, 0x0E },
{ ZLPF_AGH_THR_REG, 0x29 }, { ZLPF_THR_REG, 0x0F },
{ ZLPF_DYN_THR_REG, 0x63 }, { YCLPF_CTL1_REG, 0x23 },
{ YCLPF_CTL2_REG, 0x3B }, { YCLPF_THR_REG, 0x05 },
{ BLPF_CTL_REG, 0x1D }, { BLPF_THR1_REG, 0x05 },
{ BLPF_THR2_REG, 0x04 },
/* Automatic white balance */
{ AWB_CTL1_REG, 0xFB }, { AWB_CTL2_REG, 0x26 },
{ AWB_RMAX_REG, 0x54 }, { AWB_RMIN_REG, 0x2B },
{ AWB_BMAX_REG, 0x57 }, { AWB_BMIN_REG, 0x29 },
{ AWB_RMAXB_REG, 0x50 }, { AWB_RMINB_REG, 0x43 },
{ AWB_BMAXB_REG, 0x30 }, { AWB_BMINB_REG, 0x22 },
/* Auto exposure */
{ AE_CTL1_REG, 0x8C }, { AE_CTL2_REG, 0x04 },
{ AE_FRM_CTL_REG, 0x01 }, { AE_FINE_CTL_REG(0), 0x3F },
{ AE_FINE_CTL_REG(1), 0xA3 }, { AE_FINE_CTL_REG(3), 0x34 },
/* Lens shading compensation */
{ LENS_CTRL_REG, 0x01 }, { LENS_XCEN_REG, 0x80 },
{ LENS_YCEN_REG, 0x70 }, { LENS_R_COMP_REG, 0x53 },
{ LENS_G_COMP_REG, 0x40 }, { LENS_B_COMP_REG, 0x3e },
{ REG_TERM, 0 },
};
static inline struct sr030pc30_info *to_sr030pc30(struct v4l2_subdev *sd)
{
return container_of(sd, struct sr030pc30_info, sd);
}
static inline int set_i2c_page(struct sr030pc30_info *info,
struct i2c_client *client, unsigned int reg)
{
int ret = 0;
u32 page = reg >> 8 & 0xFF;
if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
if (!ret)
info->i2c_reg_page = page;
}
return ret;
}
static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct sr030pc30_info *info = to_sr030pc30(sd);
int ret = set_i2c_page(info, client, reg_addr);
if (!ret)
ret = i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
return ret;
}
static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct sr030pc30_info *info = to_sr030pc30(sd);
int ret = set_i2c_page(info, client, reg_addr);
if (!ret)
ret = i2c_smbus_write_byte_data(
client, reg_addr & 0xFF, val);
return ret;
}
static inline int sr030pc30_bulk_write_reg(struct v4l2_subdev *sd,
const struct i2c_regval *msg)
{
while (msg->addr != REG_TERM) {
int ret = cam_i2c_write(sd, msg->addr, msg->val);
if (ret)
return ret;
msg++;
}
return 0;
}
/* Device reset and sleep mode control */
static int sr030pc30_pwr_ctrl(struct v4l2_subdev *sd,
bool reset, bool sleep)
{
struct sr030pc30_info *info = to_sr030pc30(sd);
u8 reg = sleep ? 0xF1 : 0xF0;
int ret = 0;
if (reset)
ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
if (!ret) {
ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
if (!ret) {
info->sleep = sleep;
if (reset)
info->i2c_reg_page = -1;
}
}
return ret;
}
static int sr030pc30_set_flip(struct v4l2_subdev *sd)
{
struct sr030pc30_info *info = to_sr030pc30(sd);
s32 reg = cam_i2c_read(sd, VDO_CTL2_REG);
if (reg < 0)
return reg;
reg &= 0x7C;
if (info->hflip)
reg |= 0x01;
if (info->vflip)
reg |= 0x02;
return cam_i2c_write(sd, VDO_CTL2_REG, reg | 0x80);
}
/* Configure resolution, color format and image flip */
static int sr030pc30_set_params(struct v4l2_subdev *sd)
{
struct sr030pc30_info *info = to_sr030pc30(sd);
int ret;
if (!info->curr_win)
return -EINVAL;
/* Configure the resolution through subsampling */
ret = cam_i2c_write(sd, VDO_CTL1_REG,
info->curr_win->vid_ctl1);
if (!ret && info->curr_fmt)
ret = cam_i2c_write(sd, ISP_CTL_REG(0),
info->curr_fmt->ispctl1_reg);
if (!ret)
ret = sr030pc30_set_flip(sd);
return ret;
}
/* Find nearest matching image pixel size. */
static int sr030pc30_try_frame_size(struct v4l2_mbus_framefmt *mf)
{
unsigned int min_err = ~0;
int i = ARRAY_SIZE(sr030pc30_sizes);
const struct sr030pc30_frmsize *fsize = &sr030pc30_sizes[0],
*match = NULL;
while (i--) {
int err = abs(fsize->width - mf->width)
+ abs(fsize->height - mf->height);
if (err < min_err) {
min_err = err;
match = fsize;
}
fsize++;
}
if (match) {
mf->width = match->width;
mf->height = match->height;
return 0;
}
return -EINVAL;
}
static int sr030pc30_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct sr030pc30_info *info =
container_of(ctrl->handler, struct sr030pc30_info, hdl);
struct v4l2_subdev *sd = &info->sd;
int ret = 0;
v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
__func__, ctrl->id, ctrl->val);
switch (ctrl->id) {
case V4L2_CID_AUTO_WHITE_BALANCE:
if (ctrl->is_new) {
ret = cam_i2c_write(sd, AWB_CTL2_REG,
ctrl->val ? 0x2E : 0x2F);
if (!ret)
ret = cam_i2c_write(sd, AWB_CTL1_REG,
ctrl->val ? 0xFB : 0x7B);
}
if (!ret && info->blue->is_new)
ret = cam_i2c_write(sd, MWB_BGAIN_REG, info->blue->val);
if (!ret && info->red->is_new)
ret = cam_i2c_write(sd, MWB_RGAIN_REG, info->red->val);
return ret;
case V4L2_CID_EXPOSURE_AUTO:
/* auto anti-flicker is also enabled here */
if (ctrl->is_new)
ret = cam_i2c_write(sd, AE_CTL1_REG,
ctrl->val == V4L2_EXPOSURE_AUTO ? 0xDC : 0x0C);
if (info->exp->is_new) {
unsigned long expos = info->exp->val;
expos = expos * info->pdata->clk_rate / (8 * 1000);
if (!ret)
ret = cam_i2c_write(sd, EXP_TIMEH_REG,
expos >> 16 & 0xFF);
if (!ret)
ret = cam_i2c_write(sd, EXP_TIMEM_REG,
expos >> 8 & 0xFF);
if (!ret)
ret = cam_i2c_write(sd, EXP_TIMEL_REG,
expos & 0xFF);
}
return ret;
default:
return -EINVAL;
}
return 0;
}
static int sr030pc30_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
u32 *code)
{
if (!code || index >= ARRAY_SIZE(sr030pc30_formats))
return -EINVAL;
*code = sr030pc30_formats[index].code;
return 0;
}
static int sr030pc30_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct sr030pc30_info *info = to_sr030pc30(sd);
int ret;
if (!mf)
return -EINVAL;
if (!info->curr_win || !info->curr_fmt) {
ret = sr030pc30_set_params(sd);
if (ret)
return ret;
}
mf->width = info->curr_win->width;
mf->height = info->curr_win->height;
mf->code = info->curr_fmt->code;
mf->colorspace = info->curr_fmt->colorspace;
mf->field = V4L2_FIELD_NONE;
return 0;
}
/* Return nearest media bus frame format. */
static const struct sr030pc30_format *try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
int i = ARRAY_SIZE(sr030pc30_formats);
sr030pc30_try_frame_size(mf);
while (i--)
if (mf->code == sr030pc30_formats[i].code)
break;
mf->code = sr030pc30_formats[i].code;
return &sr030pc30_formats[i];
}
/* Return nearest media bus frame format. */
static int sr030pc30_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
if (!sd || !mf)
return -EINVAL;
try_fmt(sd, mf);
return 0;
}
static int sr030pc30_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct sr030pc30_info *info = to_sr030pc30(sd);
if (!sd || !mf)
return -EINVAL;
info->curr_fmt = try_fmt(sd, mf);
return sr030pc30_set_params(sd);
}
static int sr030pc30_base_config(struct v4l2_subdev *sd)
{
struct sr030pc30_info *info = to_sr030pc30(sd);
int ret;
unsigned long expmin, expmax;
ret = sr030pc30_bulk_write_reg(sd, sr030pc30_base_regs);
if (!ret) {
info->curr_fmt = &sr030pc30_formats[0];
info->curr_win = &sr030pc30_sizes[0];
ret = sr030pc30_set_params(sd);
}
if (!ret)
ret = sr030pc30_pwr_ctrl(sd, false, false);
if (!ret && !info->pdata)
return ret;
expmin = EXPOS_MIN_MS * info->pdata->clk_rate / (8 * 1000);
expmax = EXPOS_MAX_MS * info->pdata->clk_rate / (8 * 1000);
v4l2_dbg(1, debug, sd, "%s: expmin= %lx, expmax= %lx", __func__,
expmin, expmax);
/* Setting up manual exposure time range */
ret = cam_i2c_write(sd, EXP_MMINH_REG, expmin >> 8 & 0xFF);
if (!ret)
ret = cam_i2c_write(sd, EXP_MMINL_REG, expmin & 0xFF);
if (!ret)
ret = cam_i2c_write(sd, EXP_MMAXH_REG, expmax >> 16 & 0xFF);
if (!ret)
ret = cam_i2c_write(sd, EXP_MMAXM_REG, expmax >> 8 & 0xFF);
if (!ret)
ret = cam_i2c_write(sd, EXP_MMAXL_REG, expmax & 0xFF);
return ret;
}
static int sr030pc30_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct sr030pc30_info *info = to_sr030pc30(sd);
const struct sr030pc30_platform_data *pdata = info->pdata;
int ret;
if (pdata == NULL) {
WARN(1, "No platform data!\n");
return -EINVAL;
}
/*
* Put sensor into power sleep mode before switching off
* power and disabling MCLK.
*/
if (!on)
sr030pc30_pwr_ctrl(sd, false, true);
/* set_power controls sensor's power and clock */
if (pdata->set_power) {
ret = pdata->set_power(&client->dev, on);
if (ret)
return ret;
}
if (on) {
ret = sr030pc30_base_config(sd);
} else {
ret = 0;
info->curr_win = NULL;
info->curr_fmt = NULL;
}
return ret;
}
static const struct v4l2_ctrl_ops sr030pc30_ctrl_ops = {
.s_ctrl = sr030pc30_s_ctrl,
};
static const struct v4l2_subdev_core_ops sr030pc30_core_ops = {
.s_power = sr030pc30_s_power,
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
.g_ctrl = v4l2_subdev_g_ctrl,
.s_ctrl = v4l2_subdev_s_ctrl,
.queryctrl = v4l2_subdev_queryctrl,
.querymenu = v4l2_subdev_querymenu,
};
static const struct v4l2_subdev_video_ops sr030pc30_video_ops = {
.g_mbus_fmt = sr030pc30_g_fmt,
.s_mbus_fmt = sr030pc30_s_fmt,
.try_mbus_fmt = sr030pc30_try_fmt,
.enum_mbus_fmt = sr030pc30_enum_fmt,
};
static const struct v4l2_subdev_ops sr030pc30_ops = {
.core = &sr030pc30_core_ops,
.video = &sr030pc30_video_ops,
};
/*
* Detect sensor type. Return 0 if SR030PC30 was detected
* or -ENODEV otherwise.
*/
static int sr030pc30_detect(struct i2c_client *client)
{
const struct sr030pc30_platform_data *pdata
= client->dev.platform_data;
int ret;
/* Enable sensor's power and clock */
if (pdata->set_power) {
ret = pdata->set_power(&client->dev, 1);
if (ret)
return ret;
}
ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
if (pdata->set_power)
pdata->set_power(&client->dev, 0);
if (ret < 0) {
dev_err(&client->dev, "%s: I2C read failed\n", __func__);
return ret;
}
return ret == SR030PC30_ID ? 0 : -ENODEV;
}
static int sr030pc30_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct sr030pc30_info *info;
struct v4l2_subdev *sd;
struct v4l2_ctrl_handler *hdl;
const struct sr030pc30_platform_data *pdata
= client->dev.platform_data;
int ret;
if (!pdata) {
dev_err(&client->dev, "No platform data!");
return -EIO;
}
ret = sr030pc30_detect(client);
if (ret)
return ret;
info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
sd = &info->sd;
strcpy(sd->name, MODULE_NAME);
info->pdata = client->dev.platform_data;
v4l2_i2c_subdev_init(sd, client, &sr030pc30_ops);
hdl = &info->hdl;
v4l2_ctrl_handler_init(hdl, 6);
info->awb = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
info->red = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
V4L2_CID_RED_BALANCE, 0, 127, 1, 64);
info->blue = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
V4L2_CID_BLUE_BALANCE, 0, 127, 1, 64);
info->autoexp = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
V4L2_CID_EXPOSURE_AUTO, 0, 1, 1, 1);
info->exp = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
V4L2_CID_EXPOSURE, EXPOS_MIN_MS, EXPOS_MAX_MS, 1, 30);
sd->ctrl_handler = hdl;
if (hdl->error) {
int err = hdl->error;
v4l2_ctrl_handler_free(hdl);
return err;
}
v4l2_ctrl_auto_cluster(3, &info->awb, 0, false);
v4l2_ctrl_auto_cluster(2, &info->autoexp, V4L2_EXPOSURE_MANUAL, false);
v4l2_ctrl_handler_setup(hdl);
info->i2c_reg_page = -1;
info->hflip = 1;
return 0;
}
static int sr030pc30_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(sd->ctrl_handler);
return 0;
}
static const struct i2c_device_id sr030pc30_id[] = {
{ MODULE_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, sr030pc30_id);
static struct i2c_driver sr030pc30_i2c_driver = {
.driver = {
.name = MODULE_NAME
},
.probe = sr030pc30_probe,
.remove = sr030pc30_remove,
.id_table = sr030pc30_id,
};
module_i2c_driver(sr030pc30_i2c_driver);
MODULE_DESCRIPTION("Siliconfile SR030PC30 camera driver");
MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
MODULE_LICENSE("GPL");