/* * Driver for MT9M032 CMOS Image Sensor from Micron * * Copyright (C) 2010-2011 Lund Engineering * Contact: Gil Lund * Author: Martin Hostettler * * 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. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "aptina-pll.h" /* * width and height include active boundary and black parts * * column 0- 15 active boundary * column 16-1455 image * column 1456-1471 active boundary * column 1472-1599 black * * row 0- 51 black * row 53- 59 active boundary * row 60-1139 image * row 1140-1147 active boundary * row 1148-1151 black */ #define MT9M032_PIXEL_ARRAY_WIDTH 1600 #define MT9M032_PIXEL_ARRAY_HEIGHT 1152 #define MT9M032_CHIP_VERSION 0x00 #define MT9M032_CHIP_VERSION_VALUE 0x1402 #define MT9M032_ROW_START 0x01 #define MT9M032_ROW_START_MIN 0 #define MT9M032_ROW_START_MAX 1152 #define MT9M032_ROW_START_DEF 60 #define MT9M032_COLUMN_START 0x02 #define MT9M032_COLUMN_START_MIN 0 #define MT9M032_COLUMN_START_MAX 1600 #define MT9M032_COLUMN_START_DEF 16 #define MT9M032_ROW_SIZE 0x03 #define MT9M032_ROW_SIZE_MIN 32 #define MT9M032_ROW_SIZE_MAX 1152 #define MT9M032_ROW_SIZE_DEF 1080 #define MT9M032_COLUMN_SIZE 0x04 #define MT9M032_COLUMN_SIZE_MIN 32 #define MT9M032_COLUMN_SIZE_MAX 1600 #define MT9M032_COLUMN_SIZE_DEF 1440 #define MT9M032_HBLANK 0x05 #define MT9M032_VBLANK 0x06 #define MT9M032_VBLANK_MAX 0x7ff #define MT9M032_SHUTTER_WIDTH_HIGH 0x08 #define MT9M032_SHUTTER_WIDTH_LOW 0x09 #define MT9M032_SHUTTER_WIDTH_MIN 1 #define MT9M032_SHUTTER_WIDTH_MAX 1048575 #define MT9M032_SHUTTER_WIDTH_DEF 1943 #define MT9M032_PIX_CLK_CTRL 0x0a #define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000 #define MT9M032_RESTART 0x0b #define MT9M032_RESET 0x0d #define MT9M032_PLL_CONFIG1 0x11 #define MT9M032_PLL_CONFIG1_PREDIV_MASK 0x3f #define MT9M032_PLL_CONFIG1_MUL_SHIFT 8 #define MT9M032_READ_MODE1 0x1e #define MT9M032_READ_MODE1_OUTPUT_BAD_FRAMES (1 << 13) #define MT9M032_READ_MODE1_MAINTAIN_FRAME_RATE (1 << 12) #define MT9M032_READ_MODE1_XOR_LINE_VALID (1 << 11) #define MT9M032_READ_MODE1_CONT_LINE_VALID (1 << 10) #define MT9M032_READ_MODE1_INVERT_TRIGGER (1 << 9) #define MT9M032_READ_MODE1_SNAPSHOT (1 << 8) #define MT9M032_READ_MODE1_GLOBAL_RESET (1 << 7) #define MT9M032_READ_MODE1_BULB_EXPOSURE (1 << 6) #define MT9M032_READ_MODE1_INVERT_STROBE (1 << 5) #define MT9M032_READ_MODE1_STROBE_ENABLE (1 << 4) #define MT9M032_READ_MODE1_STROBE_START_TRIG1 (0 << 2) #define MT9M032_READ_MODE1_STROBE_START_EXP (1 << 2) #define MT9M032_READ_MODE1_STROBE_START_SHUTTER (2 << 2) #define MT9M032_READ_MODE1_STROBE_START_TRIG2 (3 << 2) #define MT9M032_READ_MODE1_STROBE_END_TRIG1 (0 << 0) #define MT9M032_READ_MODE1_STROBE_END_EXP (1 << 0) #define MT9M032_READ_MODE1_STROBE_END_SHUTTER (2 << 0) #define MT9M032_READ_MODE1_STROBE_END_TRIG2 (3 << 0) #define MT9M032_READ_MODE2 0x20 #define MT9M032_READ_MODE2_VFLIP_SHIFT 15 #define MT9M032_READ_MODE2_HFLIP_SHIFT 14 #define MT9M032_READ_MODE2_ROW_BLC 0x40 #define MT9M032_GAIN_GREEN1 0x2b #define MT9M032_GAIN_BLUE 0x2c #define MT9M032_GAIN_RED 0x2d #define MT9M032_GAIN_GREEN2 0x2e /* write only */ #define MT9M032_GAIN_ALL 0x35 #define MT9M032_GAIN_DIGITAL_MASK 0x7f #define MT9M032_GAIN_DIGITAL_SHIFT 8 #define MT9M032_GAIN_AMUL_SHIFT 6 #define MT9M032_GAIN_ANALOG_MASK 0x3f #define MT9M032_FORMATTER1 0x9e #define MT9M032_FORMATTER1_PLL_P1_6 (1 << 8) #define MT9M032_FORMATTER1_PARALLEL (1 << 12) #define MT9M032_FORMATTER2 0x9f #define MT9M032_FORMATTER2_DOUT_EN 0x1000 #define MT9M032_FORMATTER2_PIXCLK_EN 0x2000 /* * The available MT9M032 datasheet is missing documentation for register 0x10 * MT9P031 seems to be close enough, so use constants from that datasheet for * now. * But keep the name MT9P031 to remind us, that this isn't really confirmed * for this sensor. */ #define MT9P031_PLL_CONTROL 0x10 #define MT9P031_PLL_CONTROL_PWROFF 0x0050 #define MT9P031_PLL_CONTROL_PWRON 0x0051 #define MT9P031_PLL_CONTROL_USEPLL 0x0052 struct mt9m032 { struct v4l2_subdev subdev; struct media_pad pad; struct mt9m032_platform_data *pdata; unsigned int pix_clock; struct v4l2_ctrl_handler ctrls; struct { struct v4l2_ctrl *hflip; struct v4l2_ctrl *vflip; }; struct mutex lock; /* Protects streaming, format, interval and crop */ bool streaming; struct v4l2_mbus_framefmt format; struct v4l2_rect crop; struct v4l2_fract frame_interval; }; #define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev) #define to_dev(sensor) \ (&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev) static int mt9m032_read(struct i2c_client *client, u8 reg) { return i2c_smbus_read_word_swapped(client, reg); } static int mt9m032_write(struct i2c_client *client, u8 reg, const u16 data) { return i2c_smbus_write_word_swapped(client, reg, data); } static u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width) { unsigned int effective_width; u32 ns; effective_width = width + 716; /* empirical value */ ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock); dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns); return ns; } static int mt9m032_update_timing(struct mt9m032 *sensor, struct v4l2_fract *interval) { struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); struct v4l2_rect *crop = &sensor->crop; unsigned int min_vblank; unsigned int vblank; u32 row_time; if (!interval) interval = &sensor->frame_interval; row_time = mt9m032_row_time(sensor, crop->width); vblank = div_u64(1000000000ULL * interval->numerator, (u64)row_time * interval->denominator) - crop->height; if (vblank > MT9M032_VBLANK_MAX) { /* hardware limits to 11 bit values */ interval->denominator = 1000; interval->numerator = div_u64((crop->height + MT9M032_VBLANK_MAX) * (u64)row_time * interval->denominator, 1000000000ULL); vblank = div_u64(1000000000ULL * interval->numerator, (u64)row_time * interval->denominator) - crop->height; } /* enforce minimal 1.6ms blanking time. */ min_vblank = 1600000 / row_time; vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX); return mt9m032_write(client, MT9M032_VBLANK, vblank); } static int mt9m032_update_geom_timing(struct mt9m032 *sensor) { struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); int ret; ret = mt9m032_write(client, MT9M032_COLUMN_SIZE, sensor->crop.width - 1); if (!ret) ret = mt9m032_write(client, MT9M032_ROW_SIZE, sensor->crop.height - 1); if (!ret) ret = mt9m032_write(client, MT9M032_COLUMN_START, sensor->crop.left); if (!ret) ret = mt9m032_write(client, MT9M032_ROW_START, sensor->crop.top); if (!ret) ret = mt9m032_update_timing(sensor, NULL); return ret; } static int update_formatter2(struct mt9m032 *sensor, bool streaming) { struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); u16 reg_val = MT9M032_FORMATTER2_DOUT_EN | 0x0070; /* parts reserved! */ /* possibly for changing to 14-bit mode */ if (streaming) reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */ return mt9m032_write(client, MT9M032_FORMATTER2, reg_val); } static int mt9m032_setup_pll(struct mt9m032 *sensor) { static const struct aptina_pll_limits limits = { .ext_clock_min = 8000000, .ext_clock_max = 16500000, .int_clock_min = 2000000, .int_clock_max = 24000000, .out_clock_min = 322000000, .out_clock_max = 693000000, .pix_clock_max = 99000000, .n_min = 1, .n_max = 64, .m_min = 16, .m_max = 255, .p1_min = 6, .p1_max = 7, }; struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); struct mt9m032_platform_data *pdata = sensor->pdata; struct aptina_pll pll; u16 reg_val; int ret; pll.ext_clock = pdata->ext_clock; pll.pix_clock = pdata->pix_clock; ret = aptina_pll_calculate(&client->dev, &limits, &pll); if (ret < 0) return ret; sensor->pix_clock = pdata->pix_clock; ret = mt9m032_write(client, MT9M032_PLL_CONFIG1, (pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT) | ((pll.n - 1) & MT9M032_PLL_CONFIG1_PREDIV_MASK)); if (!ret) ret = mt9m032_write(client, MT9P031_PLL_CONTROL, MT9P031_PLL_CONTROL_PWRON | MT9P031_PLL_CONTROL_USEPLL); if (!ret) /* more reserved, Continuous, Master Mode */ ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8000 | MT9M032_READ_MODE1_STROBE_START_EXP | MT9M032_READ_MODE1_STROBE_END_SHUTTER); if (!ret) { reg_val = (pll.p1 == 6 ? MT9M032_FORMATTER1_PLL_P1_6 : 0) | MT9M032_FORMATTER1_PARALLEL | 0x001e; /* 14-bit */ ret = mt9m032_write(client, MT9M032_FORMATTER1, reg_val); } return ret; } /* ----------------------------------------------------------------------------- * Subdev pad operations */ static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, struct v4l2_subdev_mbus_code_enum *code) { if (code->index != 0) return -EINVAL; code->code = V4L2_MBUS_FMT_Y8_1X8; return 0; } static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, struct v4l2_subdev_frame_size_enum *fse) { if (fse->index != 0 || fse->code != V4L2_MBUS_FMT_Y8_1X8) return -EINVAL; fse->min_width = MT9M032_COLUMN_SIZE_DEF; fse->max_width = MT9M032_COLUMN_SIZE_DEF; fse->min_height = MT9M032_ROW_SIZE_DEF; fse->max_height = MT9M032_ROW_SIZE_DEF; return 0; } /** * __mt9m032_get_pad_crop() - get crop rect * @sensor: pointer to the sensor struct * @fh: file handle for getting the try crop rect from * @which: select try or active crop rect * * Returns a pointer the current active or fh relative try crop rect */ static struct v4l2_rect * __mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_fh *fh, enum v4l2_subdev_format_whence which) { switch (which) { case V4L2_SUBDEV_FORMAT_TRY: return v4l2_subdev_get_try_crop(fh, 0); case V4L2_SUBDEV_FORMAT_ACTIVE: return &sensor->crop; default: return NULL; } } /** * __mt9m032_get_pad_format() - get format * @sensor: pointer to the sensor struct * @fh: file handle for getting the try format from * @which: select try or active format * * Returns a pointer the current active or fh relative try format */ static struct v4l2_mbus_framefmt * __mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_fh *fh, enum v4l2_subdev_format_whence which) { switch (which) { case V4L2_SUBDEV_FORMAT_TRY: return v4l2_subdev_get_try_format(fh, 0); case V4L2_SUBDEV_FORMAT_ACTIVE: return &sensor->format; default: return NULL; } } static int mt9m032_get_pad_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, struct v4l2_subdev_format *fmt) { struct mt9m032 *sensor = to_mt9m032(subdev); mutex_lock(&sensor->lock); fmt->format = *__mt9m032_get_pad_format(sensor, fh, fmt->which); mutex_unlock(&sensor->lock); return 0; } static int mt9m032_set_pad_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, struct v4l2_subdev_format *fmt) { struct mt9m032 *sensor = to_mt9m032(subdev); int ret; mutex_lock(&sensor->lock); if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { ret = -EBUSY; goto done; } /* Scaling is not supported, the format is thus fixed. */ fmt->format = *__mt9m032_get_pad_format(sensor, fh, fmt->which); ret = 0; done: mutex_unlock(&sensor->lock); return ret; } static int mt9m032_get_pad_crop(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, struct v4l2_subdev_crop *crop) { struct mt9m032 *sensor = to_mt9m032(subdev); mutex_lock(&sensor->lock); crop->rect = *__mt9m032_get_pad_crop(sensor, fh, crop->which); mutex_unlock(&sensor->lock); return 0; } static int mt9m032_set_pad_crop(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, struct v4l2_subdev_crop *crop) { struct mt9m032 *sensor = to_mt9m032(subdev); struct v4l2_mbus_framefmt *format; struct v4l2_rect *__crop; struct v4l2_rect rect; int ret = 0; mutex_lock(&sensor->lock); if (sensor->streaming && crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) { ret = -EBUSY; goto done; } /* Clamp the crop rectangle boundaries and align them to a multiple of 2 * pixels to ensure a GRBG Bayer pattern. */ rect.left = clamp(ALIGN(crop->rect.left, 2), MT9M032_COLUMN_START_MIN, MT9M032_COLUMN_START_MAX); rect.top = clamp(ALIGN(crop->rect.top, 2), MT9M032_ROW_START_MIN, MT9M032_ROW_START_MAX); rect.width = clamp(ALIGN(crop->rect.width, 2), MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX); rect.height = clamp(ALIGN(crop->rect.height, 2), MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX); rect.width = min(rect.width, MT9M032_PIXEL_ARRAY_WIDTH - rect.left); rect.height = min(rect.height, MT9M032_PIXEL_ARRAY_HEIGHT - rect.top); __crop = __mt9m032_get_pad_crop(sensor, fh, crop->which); if (rect.width != __crop->width || rect.height != __crop->height) { /* Reset the output image size if the crop rectangle size has * been modified. */ format = __mt9m032_get_pad_format(sensor, fh, crop->which); format->width = rect.width; format->height = rect.height; } *__crop = rect; crop->rect = rect; if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) ret = mt9m032_update_geom_timing(sensor); done: mutex_unlock(&sensor->lock); return ret; } static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev, struct v4l2_subdev_frame_interval *fi) { struct mt9m032 *sensor = to_mt9m032(subdev); mutex_lock(&sensor->lock); memset(fi, 0, sizeof(*fi)); fi->interval = sensor->frame_interval; mutex_unlock(&sensor->lock); return 0; } static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev, struct v4l2_subdev_frame_interval *fi) { struct mt9m032 *sensor = to_mt9m032(subdev); int ret; mutex_lock(&sensor->lock); if (sensor->streaming) { ret = -EBUSY; goto done; } /* Avoid divisions by 0. */ if (fi->interval.denominator == 0) fi->interval.denominator = 1; ret = mt9m032_update_timing(sensor, &fi->interval); if (!ret) sensor->frame_interval = fi->interval; done: mutex_unlock(&sensor->lock); return ret; } static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming) { struct mt9m032 *sensor = to_mt9m032(subdev); int ret; mutex_lock(&sensor->lock); ret = update_formatter2(sensor, streaming); if (!ret) sensor->streaming = streaming; mutex_unlock(&sensor->lock); return ret; } /* ----------------------------------------------------------------------------- * V4L2 subdev core operations */ #ifdef CONFIG_VIDEO_ADV_DEBUG static int mt9m032_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct mt9m032 *sensor = to_mt9m032(sd); struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); int val; if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) return -EINVAL; if (reg->match.addr != client->addr) return -ENODEV; val = mt9m032_read(client, reg->reg); if (val < 0) return -EIO; reg->size = 2; reg->val = val; return 0; } static int mt9m032_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) { struct mt9m032 *sensor = to_mt9m032(sd); struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) return -EINVAL; if (reg->match.addr != client->addr) return -ENODEV; return mt9m032_write(client, reg->reg, reg->val); } #endif /* ----------------------------------------------------------------------------- * V4L2 subdev control operations */ static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip) { struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT) | (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT) | MT9M032_READ_MODE2_ROW_BLC | 0x0007; return mt9m032_write(client, MT9M032_READ_MODE2, reg_val); } static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val) { struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); int digital_gain_val; /* in 1/8th (0..127) */ int analog_mul; /* 0 or 1 */ int analog_gain_val; /* in 1/16th. (0..63) */ u16 reg_val; digital_gain_val = 51; /* from setup example */ if (val < 63) { analog_mul = 0; analog_gain_val = val; } else { analog_mul = 1; analog_gain_val = val / 2; } /* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */ /* overall_gain = a_gain * (1 + digital_gain_val / 8) */ reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK) << MT9M032_GAIN_DIGITAL_SHIFT) | ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT) | (analog_gain_val & MT9M032_GAIN_ANALOG_MASK); return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val); } static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl) { if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) { /* round because of multiplier used for values >= 63 */ ctrl->val &= ~1; } return 0; } static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl) { struct mt9m032 *sensor = container_of(ctrl->handler, struct mt9m032, ctrls); struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); int ret; switch (ctrl->id) { case V4L2_CID_GAIN: return mt9m032_set_gain(sensor, ctrl->val); case V4L2_CID_HFLIP: /* case V4L2_CID_VFLIP: -- In the same cluster */ return update_read_mode2(sensor, sensor->vflip->val, sensor->hflip->val); case V4L2_CID_EXPOSURE: ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH, (ctrl->val >> 16) & 0xffff); if (ret < 0) return ret; return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW, ctrl->val & 0xffff); } return 0; } static struct v4l2_ctrl_ops mt9m032_ctrl_ops = { .s_ctrl = mt9m032_set_ctrl, .try_ctrl = mt9m032_try_ctrl, }; /* -------------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops mt9m032_core_ops = { #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = mt9m032_g_register, .s_register = mt9m032_s_register, #endif }; static const struct v4l2_subdev_video_ops mt9m032_video_ops = { .s_stream = mt9m032_s_stream, .g_frame_interval = mt9m032_get_frame_interval, .s_frame_interval = mt9m032_set_frame_interval, }; static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = { .enum_mbus_code = mt9m032_enum_mbus_code, .enum_frame_size = mt9m032_enum_frame_size, .get_fmt = mt9m032_get_pad_format, .set_fmt = mt9m032_set_pad_format, .set_crop = mt9m032_set_pad_crop, .get_crop = mt9m032_get_pad_crop, }; static const struct v4l2_subdev_ops mt9m032_ops = { .core = &mt9m032_core_ops, .video = &mt9m032_video_ops, .pad = &mt9m032_pad_ops, }; /* ----------------------------------------------------------------------------- * Driver initialization and probing */ static int mt9m032_probe(struct i2c_client *client, const struct i2c_device_id *devid) { struct mt9m032_platform_data *pdata = client->dev.platform_data; struct i2c_adapter *adapter = client->adapter; struct mt9m032 *sensor; int chip_version; int ret; if (pdata == NULL) { dev_err(&client->dev, "No platform data\n"); return -EINVAL; } if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { dev_warn(&client->dev, "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); return -EIO; } if (!client->dev.platform_data) return -ENODEV; sensor = kzalloc(sizeof(*sensor), GFP_KERNEL); if (sensor == NULL) return -ENOMEM; mutex_init(&sensor->lock); sensor->pdata = pdata; v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops); sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION); if (chip_version != MT9M032_CHIP_VERSION_VALUE) { dev_err(&client->dev, "MT9M032 not detected, wrong version " "0x%04x\n", chip_version); ret = -ENODEV; goto error_sensor; } dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n", client->addr); sensor->frame_interval.numerator = 1; sensor->frame_interval.denominator = 30; sensor->crop.left = MT9M032_COLUMN_START_DEF; sensor->crop.top = MT9M032_ROW_START_DEF; sensor->crop.width = MT9M032_COLUMN_SIZE_DEF; sensor->crop.height = MT9M032_ROW_SIZE_DEF; sensor->format.width = sensor->crop.width; sensor->format.height = sensor->crop.height; sensor->format.code = V4L2_MBUS_FMT_Y8_1X8; sensor->format.field = V4L2_FIELD_NONE; sensor->format.colorspace = V4L2_COLORSPACE_SRGB; v4l2_ctrl_handler_init(&sensor->ctrls, 5); v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, V4L2_CID_GAIN, 0, 127, 1, 64); sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN, MT9M032_SHUTTER_WIDTH_MAX, 1, MT9M032_SHUTTER_WIDTH_DEF); v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, V4L2_CID_PIXEL_RATE, pdata->pix_clock, pdata->pix_clock, 1, pdata->pix_clock); if (sensor->ctrls.error) { ret = sensor->ctrls.error; dev_err(&client->dev, "control initialization error %d\n", ret); goto error_ctrl; } v4l2_ctrl_cluster(2, &sensor->hflip); sensor->subdev.ctrl_handler = &sensor->ctrls; sensor->pad.flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_init(&sensor->subdev.entity, 1, &sensor->pad, 0); if (ret < 0) goto error_ctrl; ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */ if (ret < 0) goto error_entity; ret = mt9m032_write(client, MT9M032_RESET, 0); /* reset off */ if (ret < 0) goto error_entity; ret = mt9m032_setup_pll(sensor); if (ret < 0) goto error_entity; usleep_range(10000, 11000); ret = v4l2_ctrl_handler_setup(&sensor->ctrls); if (ret < 0) goto error_entity; /* SIZE */ ret = mt9m032_update_geom_timing(sensor); if (ret < 0) goto error_entity; ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */ if (ret < 0) goto error_entity; ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */ if (ret < 0) goto error_entity; ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */ if (ret < 0) goto error_entity; ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */ if (ret < 0) goto error_entity; if (sensor->pdata->invert_pixclock) { ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL, MT9M032_PIX_CLK_CTRL_INV_PIXCLK); if (ret < 0) goto error_entity; } ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */ if (ret < 0) goto error_entity; msleep(100); ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */ if (ret < 0) goto error_entity; msleep(100); ret = update_formatter2(sensor, false); if (ret < 0) goto error_entity; return ret; error_entity: media_entity_cleanup(&sensor->subdev.entity); error_ctrl: v4l2_ctrl_handler_free(&sensor->ctrls); error_sensor: mutex_destroy(&sensor->lock); kfree(sensor); return ret; } static int mt9m032_remove(struct i2c_client *client) { struct v4l2_subdev *subdev = i2c_get_clientdata(client); struct mt9m032 *sensor = to_mt9m032(subdev); v4l2_device_unregister_subdev(subdev); v4l2_ctrl_handler_free(&sensor->ctrls); media_entity_cleanup(&subdev->entity); mutex_destroy(&sensor->lock); kfree(sensor); return 0; } static const struct i2c_device_id mt9m032_id_table[] = { { MT9M032_NAME, 0 }, { } }; MODULE_DEVICE_TABLE(i2c, mt9m032_id_table); static struct i2c_driver mt9m032_i2c_driver = { .driver = { .name = MT9M032_NAME, }, .probe = mt9m032_probe, .remove = mt9m032_remove, .id_table = mt9m032_id_table, }; module_i2c_driver(mt9m032_i2c_driver); MODULE_AUTHOR("Martin Hostettler "); MODULE_DESCRIPTION("MT9M032 camera sensor driver"); MODULE_LICENSE("GPL v2");