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linux/drivers/media/i2c/sr030pc30.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

765 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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
*/
#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/i2c/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_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (!code || code->pad ||
code->index >= ARRAY_SIZE(sr030pc30_formats))
return -EINVAL;
code->code = sr030pc30_formats[code->index].code;
return 0;
}
static int sr030pc30_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *mf;
struct sr030pc30_info *info = to_sr030pc30(sd);
if (!format || format->pad)
return -EINVAL;
mf = &format->format;
if (!info->curr_win || !info->curr_fmt)
return -EINVAL;
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;
sr030pc30_try_frame_size(mf);
for (i = 0; i < ARRAY_SIZE(sr030pc30_formats); i++) {
if (mf->code == sr030pc30_formats[i].code)
break;
}
if (i == ARRAY_SIZE(sr030pc30_formats))
i = 0;
mf->code = sr030pc30_formats[i].code;
return &sr030pc30_formats[i];
}
/* Return nearest media bus frame format. */
static int sr030pc30_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct sr030pc30_info *info = sd ? to_sr030pc30(sd) : NULL;
const struct sr030pc30_format *fmt;
struct v4l2_mbus_framefmt *mf;
if (!sd || !format)
return -EINVAL;
mf = &format->format;
if (format->pad)
return -EINVAL;
fmt = try_fmt(sd, mf);
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
cfg->try_fmt = *mf;
return 0;
}
info->curr_fmt = fmt;
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)
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,
};
static const struct v4l2_subdev_pad_ops sr030pc30_pad_ops = {
.enum_mbus_code = sr030pc30_enum_mbus_code,
.get_fmt = sr030pc30_get_fmt,
.set_fmt = sr030pc30_set_fmt,
};
static const struct v4l2_subdev_ops sr030pc30_ops = {
.core = &sr030pc30_core_ops,
.pad = &sr030pc30_pad_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;
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");
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