diff options
Diffstat (limited to 'drivers/media/i2c/sr030pc30.c')
| -rw-r--r-- | drivers/media/i2c/sr030pc30.c | 763 |
1 files changed, 763 insertions, 0 deletions
diff --git a/drivers/media/i2c/sr030pc30.c b/drivers/media/i2c/sr030pc30.c new file mode 100644 index 000000000..ff18693be --- /dev/null +++ b/drivers/media/i2c/sr030pc30.c @@ -0,0 +1,763 @@ +// 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_state *sd_state, + 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_state *sd_state, + 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_state *sd_state, + 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) { + sd_state->pads->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 void 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); +} + +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"); |