diff options
Diffstat (limited to 'drivers/media/i2c/mt9m032.c')
| -rw-r--r-- | drivers/media/i2c/mt9m032.c | 895 |
1 files changed, 895 insertions, 0 deletions
diff --git a/drivers/media/i2c/mt9m032.c b/drivers/media/i2c/mt9m032.c new file mode 100644 index 00000000000..85ec3bacdf1 --- /dev/null +++ b/drivers/media/i2c/mt9m032.c @@ -0,0 +1,895 @@ +/* + * Driver for MT9M032 CMOS Image Sensor from Micron + * + * Copyright (C) 2010-2011 Lund Engineering + * Contact: Gil Lund <gwlund@lundeng.com> + * Author: Martin Hostettler <martin@neutronstar.dyndns.org> + * + * 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 <linux/delay.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/math64.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/v4l2-mediabus.h> + +#include <media/media-entity.h> +#include <media/mt9m032.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-subdev.h> + +#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_t(unsigned int, ALIGN(crop->rect.width, 2), + MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX); + rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2), + MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX); + + rect.width = min_t(unsigned int, rect.width, + MT9M032_PIXEL_ARRAY_WIDTH - rect.left); + rect.height = min_t(unsigned int, 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->reg > 0xff) + return -EINVAL; + + 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->reg > 0xff) + return -EINVAL; + + 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 = devm_kzalloc(&client->dev, 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); + 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); + 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 <martin@neutronstar.dyndns.org>"); +MODULE_DESCRIPTION("MT9M032 camera sensor driver"); +MODULE_LICENSE("GPL v2"); |