diff options
Diffstat (limited to 'drivers/media/i2c/mt9v032.c')
| -rw-r--r-- | drivers/media/i2c/mt9v032.c | 853 |
1 files changed, 853 insertions, 0 deletions
diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c new file mode 100644 index 00000000000..e2177405dad --- /dev/null +++ b/drivers/media/i2c/mt9v032.c @@ -0,0 +1,853 @@ +/* + * Driver for MT9V032 CMOS Image Sensor from Micron + * + * Copyright (C) 2010, Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * + * Based on the MT9M001 driver, + * + * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> + * + * 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. + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/log2.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/videodev2.h> +#include <linux/v4l2-mediabus.h> +#include <linux/module.h> + +#include <media/mt9v032.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-subdev.h> + +#define MT9V032_PIXEL_ARRAY_HEIGHT 492 +#define MT9V032_PIXEL_ARRAY_WIDTH 782 + +#define MT9V032_SYSCLK_FREQ_DEF 26600000 + +#define MT9V032_CHIP_VERSION 0x00 +#define MT9V032_CHIP_ID_REV1 0x1311 +#define MT9V032_CHIP_ID_REV3 0x1313 +#define MT9V032_COLUMN_START 0x01 +#define MT9V032_COLUMN_START_MIN 1 +#define MT9V032_COLUMN_START_DEF 1 +#define MT9V032_COLUMN_START_MAX 752 +#define MT9V032_ROW_START 0x02 +#define MT9V032_ROW_START_MIN 4 +#define MT9V032_ROW_START_DEF 5 +#define MT9V032_ROW_START_MAX 482 +#define MT9V032_WINDOW_HEIGHT 0x03 +#define MT9V032_WINDOW_HEIGHT_MIN 1 +#define MT9V032_WINDOW_HEIGHT_DEF 480 +#define MT9V032_WINDOW_HEIGHT_MAX 480 +#define MT9V032_WINDOW_WIDTH 0x04 +#define MT9V032_WINDOW_WIDTH_MIN 1 +#define MT9V032_WINDOW_WIDTH_DEF 752 +#define MT9V032_WINDOW_WIDTH_MAX 752 +#define MT9V032_HORIZONTAL_BLANKING 0x05 +#define MT9V032_HORIZONTAL_BLANKING_MIN 43 +#define MT9V032_HORIZONTAL_BLANKING_DEF 94 +#define MT9V032_HORIZONTAL_BLANKING_MAX 1023 +#define MT9V032_VERTICAL_BLANKING 0x06 +#define MT9V032_VERTICAL_BLANKING_MIN 4 +#define MT9V032_VERTICAL_BLANKING_DEF 45 +#define MT9V032_VERTICAL_BLANKING_MAX 3000 +#define MT9V032_CHIP_CONTROL 0x07 +#define MT9V032_CHIP_CONTROL_MASTER_MODE (1 << 3) +#define MT9V032_CHIP_CONTROL_DOUT_ENABLE (1 << 7) +#define MT9V032_CHIP_CONTROL_SEQUENTIAL (1 << 8) +#define MT9V032_SHUTTER_WIDTH1 0x08 +#define MT9V032_SHUTTER_WIDTH2 0x09 +#define MT9V032_SHUTTER_WIDTH_CONTROL 0x0a +#define MT9V032_TOTAL_SHUTTER_WIDTH 0x0b +#define MT9V032_TOTAL_SHUTTER_WIDTH_MIN 1 +#define MT9V032_TOTAL_SHUTTER_WIDTH_DEF 480 +#define MT9V032_TOTAL_SHUTTER_WIDTH_MAX 32767 +#define MT9V032_RESET 0x0c +#define MT9V032_READ_MODE 0x0d +#define MT9V032_READ_MODE_ROW_BIN_MASK (3 << 0) +#define MT9V032_READ_MODE_ROW_BIN_SHIFT 0 +#define MT9V032_READ_MODE_COLUMN_BIN_MASK (3 << 2) +#define MT9V032_READ_MODE_COLUMN_BIN_SHIFT 2 +#define MT9V032_READ_MODE_ROW_FLIP (1 << 4) +#define MT9V032_READ_MODE_COLUMN_FLIP (1 << 5) +#define MT9V032_READ_MODE_DARK_COLUMNS (1 << 6) +#define MT9V032_READ_MODE_DARK_ROWS (1 << 7) +#define MT9V032_PIXEL_OPERATION_MODE 0x0f +#define MT9V032_PIXEL_OPERATION_MODE_COLOR (1 << 2) +#define MT9V032_PIXEL_OPERATION_MODE_HDR (1 << 6) +#define MT9V032_ANALOG_GAIN 0x35 +#define MT9V032_ANALOG_GAIN_MIN 16 +#define MT9V032_ANALOG_GAIN_DEF 16 +#define MT9V032_ANALOG_GAIN_MAX 64 +#define MT9V032_MAX_ANALOG_GAIN 0x36 +#define MT9V032_MAX_ANALOG_GAIN_MAX 127 +#define MT9V032_FRAME_DARK_AVERAGE 0x42 +#define MT9V032_DARK_AVG_THRESH 0x46 +#define MT9V032_DARK_AVG_LOW_THRESH_MASK (255 << 0) +#define MT9V032_DARK_AVG_LOW_THRESH_SHIFT 0 +#define MT9V032_DARK_AVG_HIGH_THRESH_MASK (255 << 8) +#define MT9V032_DARK_AVG_HIGH_THRESH_SHIFT 8 +#define MT9V032_ROW_NOISE_CORR_CONTROL 0x70 +#define MT9V032_ROW_NOISE_CORR_ENABLE (1 << 5) +#define MT9V032_ROW_NOISE_CORR_USE_BLK_AVG (1 << 7) +#define MT9V032_PIXEL_CLOCK 0x74 +#define MT9V032_PIXEL_CLOCK_INV_LINE (1 << 0) +#define MT9V032_PIXEL_CLOCK_INV_FRAME (1 << 1) +#define MT9V032_PIXEL_CLOCK_XOR_LINE (1 << 2) +#define MT9V032_PIXEL_CLOCK_CONT_LINE (1 << 3) +#define MT9V032_PIXEL_CLOCK_INV_PXL_CLK (1 << 4) +#define MT9V032_TEST_PATTERN 0x7f +#define MT9V032_TEST_PATTERN_DATA_MASK (1023 << 0) +#define MT9V032_TEST_PATTERN_DATA_SHIFT 0 +#define MT9V032_TEST_PATTERN_USE_DATA (1 << 10) +#define MT9V032_TEST_PATTERN_GRAY_MASK (3 << 11) +#define MT9V032_TEST_PATTERN_GRAY_NONE (0 << 11) +#define MT9V032_TEST_PATTERN_GRAY_VERTICAL (1 << 11) +#define MT9V032_TEST_PATTERN_GRAY_HORIZONTAL (2 << 11) +#define MT9V032_TEST_PATTERN_GRAY_DIAGONAL (3 << 11) +#define MT9V032_TEST_PATTERN_ENABLE (1 << 13) +#define MT9V032_TEST_PATTERN_FLIP (1 << 14) +#define MT9V032_AEC_AGC_ENABLE 0xaf +#define MT9V032_AEC_ENABLE (1 << 0) +#define MT9V032_AGC_ENABLE (1 << 1) +#define MT9V032_THERMAL_INFO 0xc1 + +struct mt9v032 { + struct v4l2_subdev subdev; + struct media_pad pad; + + struct v4l2_mbus_framefmt format; + struct v4l2_rect crop; + + struct v4l2_ctrl_handler ctrls; + struct { + struct v4l2_ctrl *link_freq; + struct v4l2_ctrl *pixel_rate; + }; + + struct mutex power_lock; + int power_count; + + struct mt9v032_platform_data *pdata; + + u32 sysclk; + u16 chip_control; + u16 aec_agc; + u16 hblank; +}; + +static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd) +{ + return container_of(sd, struct mt9v032, subdev); +} + +static int mt9v032_read(struct i2c_client *client, const u8 reg) +{ + s32 data = i2c_smbus_read_word_swapped(client, reg); + dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__, + data, reg); + return data; +} + +static int mt9v032_write(struct i2c_client *client, const u8 reg, + const u16 data) +{ + dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__, + data, reg); + return i2c_smbus_write_word_swapped(client, reg, data); +} + +static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + u16 value = (mt9v032->chip_control & ~clear) | set; + int ret; + + ret = mt9v032_write(client, MT9V032_CHIP_CONTROL, value); + if (ret < 0) + return ret; + + mt9v032->chip_control = value; + return 0; +} + +static int +mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + u16 value = mt9v032->aec_agc; + int ret; + + if (enable) + value |= which; + else + value &= ~which; + + ret = mt9v032_write(client, MT9V032_AEC_AGC_ENABLE, value); + if (ret < 0) + return ret; + + mt9v032->aec_agc = value; + return 0; +} + +static int +mt9v032_update_hblank(struct mt9v032 *mt9v032) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + struct v4l2_rect *crop = &mt9v032->crop; + + return mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING, + max_t(s32, mt9v032->hblank, 660 - crop->width)); +} + +#define EXT_CLK 25000000 + +static int mt9v032_power_on(struct mt9v032 *mt9v032) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + int ret; + + if (mt9v032->pdata->set_clock) { + mt9v032->pdata->set_clock(&mt9v032->subdev, mt9v032->sysclk); + udelay(1); + } + + /* Reset the chip and stop data read out */ + ret = mt9v032_write(client, MT9V032_RESET, 1); + if (ret < 0) + return ret; + + ret = mt9v032_write(client, MT9V032_RESET, 0); + if (ret < 0) + return ret; + + return mt9v032_write(client, MT9V032_CHIP_CONTROL, 0); +} + +static void mt9v032_power_off(struct mt9v032 *mt9v032) +{ + if (mt9v032->pdata->set_clock) + mt9v032->pdata->set_clock(&mt9v032->subdev, 0); +} + +static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + int ret; + + if (!on) { + mt9v032_power_off(mt9v032); + return 0; + } + + ret = mt9v032_power_on(mt9v032); + if (ret < 0) + return ret; + + /* Configure the pixel clock polarity */ + if (mt9v032->pdata && mt9v032->pdata->clk_pol) { + ret = mt9v032_write(client, MT9V032_PIXEL_CLOCK, + MT9V032_PIXEL_CLOCK_INV_PXL_CLK); + if (ret < 0) + return ret; + } + + /* Disable the noise correction algorithm and restore the controls. */ + ret = mt9v032_write(client, MT9V032_ROW_NOISE_CORR_CONTROL, 0); + if (ret < 0) + return ret; + + return v4l2_ctrl_handler_setup(&mt9v032->ctrls); +} + +/* ----------------------------------------------------------------------------- + * V4L2 subdev video operations + */ + +static struct v4l2_mbus_framefmt * +__mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + switch (which) { + case V4L2_SUBDEV_FORMAT_TRY: + return v4l2_subdev_get_try_format(fh, pad); + case V4L2_SUBDEV_FORMAT_ACTIVE: + return &mt9v032->format; + default: + return NULL; + } +} + +static struct v4l2_rect * +__mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + switch (which) { + case V4L2_SUBDEV_FORMAT_TRY: + return v4l2_subdev_get_try_crop(fh, pad); + case V4L2_SUBDEV_FORMAT_ACTIVE: + return &mt9v032->crop; + default: + return NULL; + } +} + +static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable) +{ + const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE + | MT9V032_CHIP_CONTROL_DOUT_ENABLE + | MT9V032_CHIP_CONTROL_SEQUENTIAL; + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + struct v4l2_mbus_framefmt *format = &mt9v032->format; + struct v4l2_rect *crop = &mt9v032->crop; + unsigned int hratio; + unsigned int vratio; + int ret; + + if (!enable) + return mt9v032_set_chip_control(mt9v032, mode, 0); + + /* Configure the window size and row/column bin */ + hratio = DIV_ROUND_CLOSEST(crop->width, format->width); + vratio = DIV_ROUND_CLOSEST(crop->height, format->height); + + ret = mt9v032_write(client, MT9V032_READ_MODE, + (hratio - 1) << MT9V032_READ_MODE_ROW_BIN_SHIFT | + (vratio - 1) << MT9V032_READ_MODE_COLUMN_BIN_SHIFT); + if (ret < 0) + return ret; + + ret = mt9v032_write(client, MT9V032_COLUMN_START, crop->left); + if (ret < 0) + return ret; + + ret = mt9v032_write(client, MT9V032_ROW_START, crop->top); + if (ret < 0) + return ret; + + ret = mt9v032_write(client, MT9V032_WINDOW_WIDTH, crop->width); + if (ret < 0) + return ret; + + ret = mt9v032_write(client, MT9V032_WINDOW_HEIGHT, crop->height); + if (ret < 0) + return ret; + + ret = mt9v032_update_hblank(mt9v032); + if (ret < 0) + return ret; + + /* Switch to master "normal" mode */ + return mt9v032_set_chip_control(mt9v032, 0, mode); +} + +static int mt9v032_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_SGRBG10_1X10; + return 0; +} + +static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10) + return -EINVAL; + + fse->min_width = MT9V032_WINDOW_WIDTH_DEF / fse->index; + fse->max_width = fse->min_width; + fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / fse->index; + fse->max_height = fse->min_height; + + return 0; +} + +static int mt9v032_get_format(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *format) +{ + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + + format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad, + format->which); + return 0; +} + +static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032, + unsigned int hratio) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + int ret; + + ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate, + mt9v032->sysclk / hratio); + if (ret < 0) + dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret); +} + +static int mt9v032_set_format(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *format) +{ + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + struct v4l2_mbus_framefmt *__format; + struct v4l2_rect *__crop; + unsigned int width; + unsigned int height; + unsigned int hratio; + unsigned int vratio; + + __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad, + format->which); + + /* Clamp the width and height to avoid dividing by zero. */ + width = clamp_t(unsigned int, ALIGN(format->format.width, 2), + max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN), + __crop->width); + height = clamp_t(unsigned int, ALIGN(format->format.height, 2), + max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN), + __crop->height); + + hratio = DIV_ROUND_CLOSEST(__crop->width, width); + vratio = DIV_ROUND_CLOSEST(__crop->height, height); + + __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad, + format->which); + __format->width = __crop->width / hratio; + __format->height = __crop->height / vratio; + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) + mt9v032_configure_pixel_rate(mt9v032, hratio); + + format->format = *__format; + + return 0; +} + +static int mt9v032_get_crop(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_crop *crop) +{ + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + + crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad, + crop->which); + return 0; +} + +static int mt9v032_set_crop(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_crop *crop) +{ + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + struct v4l2_mbus_framefmt *__format; + struct v4l2_rect *__crop; + struct v4l2_rect rect; + + /* Clamp the crop rectangle boundaries and align them to a non multiple + * of 2 pixels to ensure a GRBG Bayer pattern. + */ + rect.left = clamp(ALIGN(crop->rect.left + 1, 2) - 1, + MT9V032_COLUMN_START_MIN, + MT9V032_COLUMN_START_MAX); + rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1, + MT9V032_ROW_START_MIN, + MT9V032_ROW_START_MAX); + rect.width = clamp(ALIGN(crop->rect.width, 2), + MT9V032_WINDOW_WIDTH_MIN, + MT9V032_WINDOW_WIDTH_MAX); + rect.height = clamp(ALIGN(crop->rect.height, 2), + MT9V032_WINDOW_HEIGHT_MIN, + MT9V032_WINDOW_HEIGHT_MAX); + + rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left); + rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top); + + __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, 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 = __mt9v032_get_pad_format(mt9v032, fh, crop->pad, + crop->which); + __format->width = rect.width; + __format->height = rect.height; + if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) + mt9v032_configure_pixel_rate(mt9v032, 1); + } + + *__crop = rect; + crop->rect = rect; + + return 0; +} + +/* ----------------------------------------------------------------------------- + * V4L2 subdev control operations + */ + +#define V4L2_CID_TEST_PATTERN (V4L2_CID_USER_BASE | 0x1001) + +static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct mt9v032 *mt9v032 = + container_of(ctrl->handler, struct mt9v032, ctrls); + struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); + u32 freq; + u16 data; + + switch (ctrl->id) { + case V4L2_CID_AUTOGAIN: + return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE, + ctrl->val); + + case V4L2_CID_GAIN: + return mt9v032_write(client, MT9V032_ANALOG_GAIN, ctrl->val); + + case V4L2_CID_EXPOSURE_AUTO: + return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE, + !ctrl->val); + + case V4L2_CID_EXPOSURE: + return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH, + ctrl->val); + + case V4L2_CID_HBLANK: + mt9v032->hblank = ctrl->val; + return mt9v032_update_hblank(mt9v032); + + case V4L2_CID_VBLANK: + return mt9v032_write(client, MT9V032_VERTICAL_BLANKING, + ctrl->val); + + case V4L2_CID_PIXEL_RATE: + case V4L2_CID_LINK_FREQ: + if (mt9v032->link_freq == NULL) + break; + + freq = mt9v032->pdata->link_freqs[mt9v032->link_freq->val]; + mt9v032->pixel_rate->val64 = freq; + mt9v032->sysclk = freq; + break; + + case V4L2_CID_TEST_PATTERN: + switch (ctrl->val) { + case 0: + data = 0; + break; + case 1: + data = MT9V032_TEST_PATTERN_GRAY_VERTICAL + | MT9V032_TEST_PATTERN_ENABLE; + break; + case 2: + data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL + | MT9V032_TEST_PATTERN_ENABLE; + break; + case 3: + data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL + | MT9V032_TEST_PATTERN_ENABLE; + break; + default: + data = (ctrl->val << MT9V032_TEST_PATTERN_DATA_SHIFT) + | MT9V032_TEST_PATTERN_USE_DATA + | MT9V032_TEST_PATTERN_ENABLE + | MT9V032_TEST_PATTERN_FLIP; + break; + } + + return mt9v032_write(client, MT9V032_TEST_PATTERN, data); + } + + return 0; +} + +static struct v4l2_ctrl_ops mt9v032_ctrl_ops = { + .s_ctrl = mt9v032_s_ctrl, +}; + +static const struct v4l2_ctrl_config mt9v032_ctrls[] = { + { + .ops = &mt9v032_ctrl_ops, + .id = V4L2_CID_TEST_PATTERN, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Test pattern", + .min = 0, + .max = 1023, + .step = 1, + .def = 0, + .flags = 0, + } +}; + +/* ----------------------------------------------------------------------------- + * V4L2 subdev core operations + */ + +static int mt9v032_set_power(struct v4l2_subdev *subdev, int on) +{ + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + int ret = 0; + + mutex_lock(&mt9v032->power_lock); + + /* If the power count is modified from 0 to != 0 or from != 0 to 0, + * update the power state. + */ + if (mt9v032->power_count == !on) { + ret = __mt9v032_set_power(mt9v032, !!on); + if (ret < 0) + goto done; + } + + /* Update the power count. */ + mt9v032->power_count += on ? 1 : -1; + WARN_ON(mt9v032->power_count < 0); + +done: + mutex_unlock(&mt9v032->power_lock); + return ret; +} + +/* ----------------------------------------------------------------------------- + * V4L2 subdev internal operations + */ + +static int mt9v032_registered(struct v4l2_subdev *subdev) +{ + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + s32 data; + int ret; + + dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n", + client->addr); + + ret = mt9v032_power_on(mt9v032); + if (ret < 0) { + dev_err(&client->dev, "MT9V032 power up failed\n"); + return ret; + } + + /* Read and check the sensor version */ + data = mt9v032_read(client, MT9V032_CHIP_VERSION); + if (data != MT9V032_CHIP_ID_REV1 && data != MT9V032_CHIP_ID_REV3) { + dev_err(&client->dev, "MT9V032 not detected, wrong version " + "0x%04x\n", data); + return -ENODEV; + } + + mt9v032_power_off(mt9v032); + + dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n", + client->addr); + + mt9v032_configure_pixel_rate(mt9v032, 1); + + return ret; +} + +static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh) +{ + struct v4l2_mbus_framefmt *format; + struct v4l2_rect *crop; + + crop = v4l2_subdev_get_try_crop(fh, 0); + crop->left = MT9V032_COLUMN_START_DEF; + crop->top = MT9V032_ROW_START_DEF; + crop->width = MT9V032_WINDOW_WIDTH_DEF; + crop->height = MT9V032_WINDOW_HEIGHT_DEF; + + format = v4l2_subdev_get_try_format(fh, 0); + format->code = V4L2_MBUS_FMT_SGRBG10_1X10; + format->width = MT9V032_WINDOW_WIDTH_DEF; + format->height = MT9V032_WINDOW_HEIGHT_DEF; + format->field = V4L2_FIELD_NONE; + format->colorspace = V4L2_COLORSPACE_SRGB; + + return mt9v032_set_power(subdev, 1); +} + +static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh) +{ + return mt9v032_set_power(subdev, 0); +} + +static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = { + .s_power = mt9v032_set_power, +}; + +static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = { + .s_stream = mt9v032_s_stream, +}; + +static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = { + .enum_mbus_code = mt9v032_enum_mbus_code, + .enum_frame_size = mt9v032_enum_frame_size, + .get_fmt = mt9v032_get_format, + .set_fmt = mt9v032_set_format, + .get_crop = mt9v032_get_crop, + .set_crop = mt9v032_set_crop, +}; + +static struct v4l2_subdev_ops mt9v032_subdev_ops = { + .core = &mt9v032_subdev_core_ops, + .video = &mt9v032_subdev_video_ops, + .pad = &mt9v032_subdev_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = { + .registered = mt9v032_registered, + .open = mt9v032_open, + .close = mt9v032_close, +}; + +/* ----------------------------------------------------------------------------- + * Driver initialization and probing + */ + +static int mt9v032_probe(struct i2c_client *client, + const struct i2c_device_id *did) +{ + struct mt9v032_platform_data *pdata = client->dev.platform_data; + struct mt9v032 *mt9v032; + unsigned int i; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WORD_DATA)) { + dev_warn(&client->adapter->dev, + "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); + return -EIO; + } + + mt9v032 = kzalloc(sizeof(*mt9v032), GFP_KERNEL); + if (!mt9v032) + return -ENOMEM; + + mutex_init(&mt9v032->power_lock); + mt9v032->pdata = pdata; + + v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 8); + + v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_AUTOGAIN, 0, 1, 1, 1); + v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN, + MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF); + v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0, + V4L2_EXPOSURE_AUTO); + v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN, + MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1, + MT9V032_TOTAL_SHUTTER_WIDTH_DEF); + v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_HBLANK, MT9V032_HORIZONTAL_BLANKING_MIN, + MT9V032_HORIZONTAL_BLANKING_MAX, 1, + MT9V032_HORIZONTAL_BLANKING_DEF); + v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_VBLANK, MT9V032_VERTICAL_BLANKING_MIN, + MT9V032_VERTICAL_BLANKING_MAX, 1, + MT9V032_VERTICAL_BLANKING_DEF); + + mt9v032->pixel_rate = + v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, + V4L2_CID_PIXEL_RATE, 0, 0, 1, 0); + + if (pdata && pdata->link_freqs) { + unsigned int def = 0; + + for (i = 0; pdata->link_freqs[i]; ++i) { + if (pdata->link_freqs[i] == pdata->link_def_freq) + def = i; + } + + mt9v032->link_freq = + v4l2_ctrl_new_int_menu(&mt9v032->ctrls, + &mt9v032_ctrl_ops, + V4L2_CID_LINK_FREQ, i - 1, def, + pdata->link_freqs); + v4l2_ctrl_cluster(2, &mt9v032->link_freq); + } + + for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i) + v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL); + + mt9v032->subdev.ctrl_handler = &mt9v032->ctrls; + + if (mt9v032->ctrls.error) + printk(KERN_INFO "%s: control initialization error %d\n", + __func__, mt9v032->ctrls.error); + + mt9v032->crop.left = MT9V032_COLUMN_START_DEF; + mt9v032->crop.top = MT9V032_ROW_START_DEF; + mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF; + mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF; + + mt9v032->format.code = V4L2_MBUS_FMT_SGRBG10_1X10; + mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF; + mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF; + mt9v032->format.field = V4L2_FIELD_NONE; + mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB; + + mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE; + mt9v032->hblank = MT9V032_HORIZONTAL_BLANKING_DEF; + mt9v032->sysclk = MT9V032_SYSCLK_FREQ_DEF; + + v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops); + mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops; + mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0); + if (ret < 0) + kfree(mt9v032); + + return ret; +} + +static int mt9v032_remove(struct i2c_client *client) +{ + struct v4l2_subdev *subdev = i2c_get_clientdata(client); + struct mt9v032 *mt9v032 = to_mt9v032(subdev); + + v4l2_device_unregister_subdev(subdev); + media_entity_cleanup(&subdev->entity); + kfree(mt9v032); + return 0; +} + +static const struct i2c_device_id mt9v032_id[] = { + { "mt9v032", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mt9v032_id); + +static struct i2c_driver mt9v032_driver = { + .driver = { + .name = "mt9v032", + }, + .probe = mt9v032_probe, + .remove = mt9v032_remove, + .id_table = mt9v032_id, +}; + +module_i2c_driver(mt9v032_driver); + +MODULE_DESCRIPTION("Aptina MT9V032 Camera driver"); +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_LICENSE("GPL"); |