diff options
Diffstat (limited to 'drivers/media/video/mt9v022.c')
| -rw-r--r-- | drivers/media/video/mt9v022.c | 804 |
1 files changed, 804 insertions, 0 deletions
diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c new file mode 100644 index 00000000000..9b406e41902 --- /dev/null +++ b/drivers/media/video/mt9v022.c @@ -0,0 +1,804 @@ +/* + * Driver for MT9V022 CMOS Image Sensor from Micron + * + * 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/videodev2.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/log2.h> + +#include <media/v4l2-common.h> +#include <media/v4l2-chip-ident.h> +#include <media/soc_camera.h> + +#include <asm/gpio.h> + +/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c + * The platform has to define i2c_board_info + * and call i2c_register_board_info() */ + +static char *sensor_type; +module_param(sensor_type, charp, S_IRUGO); +MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"\n"); + +/* mt9v022 selected register addresses */ +#define MT9V022_CHIP_VERSION 0x00 +#define MT9V022_COLUMN_START 0x01 +#define MT9V022_ROW_START 0x02 +#define MT9V022_WINDOW_HEIGHT 0x03 +#define MT9V022_WINDOW_WIDTH 0x04 +#define MT9V022_HORIZONTAL_BLANKING 0x05 +#define MT9V022_VERTICAL_BLANKING 0x06 +#define MT9V022_CHIP_CONTROL 0x07 +#define MT9V022_SHUTTER_WIDTH1 0x08 +#define MT9V022_SHUTTER_WIDTH2 0x09 +#define MT9V022_SHUTTER_WIDTH_CTRL 0x0a +#define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b +#define MT9V022_RESET 0x0c +#define MT9V022_READ_MODE 0x0d +#define MT9V022_MONITOR_MODE 0x0e +#define MT9V022_PIXEL_OPERATION_MODE 0x0f +#define MT9V022_LED_OUT_CONTROL 0x1b +#define MT9V022_ADC_MODE_CONTROL 0x1c +#define MT9V022_ANALOG_GAIN 0x34 +#define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47 +#define MT9V022_PIXCLK_FV_LV 0x74 +#define MT9V022_DIGITAL_TEST_PATTERN 0x7f +#define MT9V022_AEC_AGC_ENABLE 0xAF +#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD + +/* Progressive scan, master, defaults */ +#define MT9V022_CHIP_CONTROL_DEFAULT 0x188 + +static const struct soc_camera_data_format mt9v022_formats[] = { + { + .name = "RGB Bayer (sRGB)", + .depth = 8, + .fourcc = V4L2_PIX_FMT_SBGGR8, + .colorspace = V4L2_COLORSPACE_SRGB, + }, { + .name = "RGB Bayer (sRGB)", + .depth = 10, + .fourcc = V4L2_PIX_FMT_SBGGR16, + .colorspace = V4L2_COLORSPACE_SRGB, + }, { + .name = "Monochrome 10 bit", + .depth = 10, + .fourcc = V4L2_PIX_FMT_Y16, + }, { + .name = "Monochrome 8 bit", + .depth = 8, + .fourcc = V4L2_PIX_FMT_GREY, + }, +}; + +struct mt9v022 { + struct i2c_client *client; + struct soc_camera_device icd; + int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ + int switch_gpio; + u16 chip_control; + unsigned char datawidth; +}; + +static int reg_read(struct soc_camera_device *icd, const u8 reg) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + struct i2c_client *client = mt9v022->client; + s32 data = i2c_smbus_read_word_data(client, reg); + return data < 0 ? data : swab16(data); +} + +static int reg_write(struct soc_camera_device *icd, const u8 reg, + const u16 data) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + return i2c_smbus_write_word_data(mt9v022->client, reg, swab16(data)); +} + +static int reg_set(struct soc_camera_device *icd, const u8 reg, + const u16 data) +{ + int ret; + + ret = reg_read(icd, reg); + if (ret < 0) + return ret; + return reg_write(icd, reg, ret | data); +} + +static int reg_clear(struct soc_camera_device *icd, const u8 reg, + const u16 data) +{ + int ret; + + ret = reg_read(icd, reg); + if (ret < 0) + return ret; + return reg_write(icd, reg, ret & ~data); +} + +static int mt9v022_init(struct soc_camera_device *icd) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + int ret; + + /* Almost the default mode: master, parallel, simultaneous, and an + * undocumented bit 0x200, which is present in table 7, but not in 8, + * plus snapshot mode to disable scan for now */ + mt9v022->chip_control |= 0x10; + ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control); + if (ret >= 0) + reg_write(icd, MT9V022_READ_MODE, 0x300); + + /* All defaults */ + if (ret >= 0) + /* AEC, AGC on */ + ret = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x3); + if (ret >= 0) + ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480); + if (ret >= 0) + /* default - auto */ + ret = reg_clear(icd, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1); + if (ret >= 0) + ret = reg_write(icd, MT9V022_DIGITAL_TEST_PATTERN, 0); + + return ret >= 0 ? 0 : -EIO; +} + +static int mt9v022_release(struct soc_camera_device *icd) +{ + /* Nothing? */ + return 0; +} + +static int mt9v022_start_capture(struct soc_camera_device *icd) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + /* Switch to master "normal" mode */ + mt9v022->chip_control &= ~0x10; + if (reg_write(icd, MT9V022_CHIP_CONTROL, + mt9v022->chip_control) < 0) + return -EIO; + return 0; +} + +static int mt9v022_stop_capture(struct soc_camera_device *icd) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + /* Switch to snapshot mode */ + mt9v022->chip_control |= 0x10; + if (reg_write(icd, MT9V022_CHIP_CONTROL, + mt9v022->chip_control) < 0) + return -EIO; + return 0; +} + +static int bus_switch_request(struct mt9v022 *mt9v022, struct soc_camera_link *icl) +{ +#ifdef CONFIG_MT9V022_PCA9536_SWITCH + int ret; + unsigned int gpio = icl->gpio; + + if (gpio != NO_GPIO) { + /* We have a data bus switch. */ + ret = gpio_request(gpio, "mt9v022"); + if (ret < 0) { + dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n", gpio); + return ret; + } + + ret = gpio_direction_output(gpio, 0); + if (ret < 0) { + dev_err(&mt9v022->client->dev, + "Cannot set GPIO %u to output\n", gpio); + gpio_free(gpio); + return ret; + } + } + + mt9v022->switch_gpio = gpio; +#else + mt9v022->switch_gpio = NO_GPIO; +#endif + return 0; +} + +static void bus_switch_release(struct mt9v022 *mt9v022) +{ +#ifdef CONFIG_MT9V022_PCA9536_SWITCH + if (mt9v022->switch_gpio != NO_GPIO) + gpio_free(mt9v022->switch_gpio); +#endif +} + +static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit) +{ +#ifdef CONFIG_MT9V022_PCA9536_SWITCH + if (mt9v022->switch_gpio == NO_GPIO) + return -ENODEV; + + gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit); + return 0; +#else + return -ENODEV; +#endif +} + +static int mt9v022_set_capture_format(struct soc_camera_device *icd, + __u32 pixfmt, struct v4l2_rect *rect, unsigned int flags) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + unsigned int width_flag = flags & (IS_DATAWIDTH_10 | IS_DATAWIDTH_9 | + IS_DATAWIDTH_8); + u16 pixclk = 0; + int ret; + + /* Only one width bit may be set */ + if (!is_power_of_2(width_flag)) + return -EINVAL; + + /* The caller provides a supported format, as verified per call to + * icd->try_fmt_cap(), datawidth is from our supported format list */ + switch (pixfmt) { + case V4L2_PIX_FMT_GREY: + case V4L2_PIX_FMT_Y16: + if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM) + return -EINVAL; + break; + case V4L2_PIX_FMT_SBGGR8: + case V4L2_PIX_FMT_SBGGR16: + if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC) + return -EINVAL; + break; + case 0: + /* No format change, only geometry */ + break; + default: + return -EINVAL; + } + + /* Like in example app. Contradicts the datasheet though */ + ret = reg_read(icd, MT9V022_AEC_AGC_ENABLE); + if (ret >= 0) { + if (ret & 1) /* Autoexposure */ + ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, + rect->height + icd->y_skip_top + 43); + else + ret = reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH, + rect->height + icd->y_skip_top + 43); + } + /* Setup frame format: defaults apart from width and height */ + if (ret >= 0) + ret = reg_write(icd, MT9V022_COLUMN_START, rect->left); + if (ret >= 0) + ret = reg_write(icd, MT9V022_ROW_START, rect->top); + if (ret >= 0) + /* Default 94, Phytec driver says: + * "width + horizontal blank >= 660" */ + ret = reg_write(icd, MT9V022_HORIZONTAL_BLANKING, + rect->width > 660 - 43 ? 43 : + 660 - rect->width); + if (ret >= 0) + ret = reg_write(icd, MT9V022_VERTICAL_BLANKING, 45); + if (ret >= 0) + ret = reg_write(icd, MT9V022_WINDOW_WIDTH, rect->width); + if (ret >= 0) + ret = reg_write(icd, MT9V022_WINDOW_HEIGHT, + rect->height + icd->y_skip_top); + + if (ret < 0) + return ret; + + dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height); + + if ((mt9v022->datawidth != 10 && (width_flag == IS_DATAWIDTH_10)) || + (mt9v022->datawidth != 9 && (width_flag == IS_DATAWIDTH_9)) || + (mt9v022->datawidth != 8 && (width_flag == IS_DATAWIDTH_8))) { + /* data width switch requested */ + if (mt9v022->switch_gpio == NO_GPIO) + return -EINVAL; + + /* Well, we actually only can do 10 or 8 bits... */ + if (width_flag == IS_DATAWIDTH_9) + return -EINVAL; + + ret = bus_switch_act(mt9v022, + width_flag == IS_DATAWIDTH_8); + if (ret < 0) + return ret; + + mt9v022->datawidth = width_flag == IS_DATAWIDTH_8 ? 8 : 10; + } + + if (flags & IS_PCLK_SAMPLE_RISING) + pixclk |= 0x10; + + if (!(flags & IS_HSYNC_ACTIVE_HIGH)) + pixclk |= 0x1; + + if (!(flags & IS_VSYNC_ACTIVE_HIGH)) + pixclk |= 0x2; + + ret = reg_write(icd, MT9V022_PIXCLK_FV_LV, pixclk); + if (ret < 0) + return ret; + + if (!(flags & IS_MASTER)) + mt9v022->chip_control &= ~0x8; + + ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control); + if (ret < 0) + return ret; + + dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n", + pixclk, mt9v022->chip_control); + + return 0; +} + +static int mt9v022_try_fmt_cap(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + if (f->fmt.pix.height < 32 + icd->y_skip_top) + f->fmt.pix.height = 32 + icd->y_skip_top; + if (f->fmt.pix.height > 480 + icd->y_skip_top) + f->fmt.pix.height = 480 + icd->y_skip_top; + if (f->fmt.pix.width < 48) + f->fmt.pix.width = 48; + if (f->fmt.pix.width > 752) + f->fmt.pix.width = 752; + f->fmt.pix.width &= ~0x03; /* ? */ + + return 0; +} + +static int mt9v022_get_chip_id(struct soc_camera_device *icd, + struct v4l2_chip_ident *id) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + + if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR) + return -EINVAL; + + if (id->match_chip != mt9v022->client->addr) + return -ENODEV; + + id->ident = mt9v022->model; + id->revision = 0; + + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int mt9v022_get_register(struct soc_camera_device *icd, + struct v4l2_register *reg) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + + if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) + return -EINVAL; + + if (reg->match_chip != mt9v022->client->addr) + return -ENODEV; + + reg->val = reg_read(icd, reg->reg); + + if (reg->val > 0xffff) + return -EIO; + + return 0; +} + +static int mt9v022_set_register(struct soc_camera_device *icd, + struct v4l2_register *reg) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + + if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) + return -EINVAL; + + if (reg->match_chip != mt9v022->client->addr) + return -ENODEV; + + if (reg_write(icd, reg->reg, reg->val) < 0) + return -EIO; + + return 0; +} +#endif + +static unsigned int mt9v022_get_datawidth(struct soc_camera_device *icd) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + return mt9v022->datawidth; +} + +const struct v4l2_queryctrl mt9v022_controls[] = { + { + .id = V4L2_CID_VFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Flip Vertically", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0, + }, { + .id = V4L2_CID_HFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Flip Horizontally", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0, + }, { + .id = V4L2_CID_GAIN, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Analog Gain", + .minimum = 64, + .maximum = 127, + .step = 1, + .default_value = 64, + .flags = V4L2_CTRL_FLAG_SLIDER, + }, { + .id = V4L2_CID_EXPOSURE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Exposure", + .minimum = 1, + .maximum = 255, + .step = 1, + .default_value = 255, + .flags = V4L2_CTRL_FLAG_SLIDER, + }, { + .id = V4L2_CID_AUTOGAIN, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Automatic Gain", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1, + }, { + .id = V4L2_CID_EXPOSURE_AUTO, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Automatic Exposure", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1, + } +}; + +static int mt9v022_get_control(struct soc_camera_device *icd, + struct v4l2_control *ctrl); +static int mt9v022_set_control(struct soc_camera_device *icd, + struct v4l2_control *ctrl); + +static struct soc_camera_ops mt9v022_ops = { + .owner = THIS_MODULE, + .init = mt9v022_init, + .release = mt9v022_release, + .start_capture = mt9v022_start_capture, + .stop_capture = mt9v022_stop_capture, + .set_capture_format = mt9v022_set_capture_format, + .try_fmt_cap = mt9v022_try_fmt_cap, + .formats = mt9v022_formats, + .num_formats = ARRAY_SIZE(mt9v022_formats), + .get_datawidth = mt9v022_get_datawidth, + .controls = mt9v022_controls, + .num_controls = ARRAY_SIZE(mt9v022_controls), + .get_control = mt9v022_get_control, + .set_control = mt9v022_set_control, + .get_chip_id = mt9v022_get_chip_id, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .get_register = mt9v022_get_register, + .set_register = mt9v022_set_register, +#endif +}; + +static int mt9v022_get_control(struct soc_camera_device *icd, + struct v4l2_control *ctrl) +{ + int data; + + switch (ctrl->id) { + case V4L2_CID_VFLIP: + data = reg_read(icd, MT9V022_READ_MODE); + if (data < 0) + return -EIO; + ctrl->value = !!(data & 0x10); + break; + case V4L2_CID_HFLIP: + data = reg_read(icd, MT9V022_READ_MODE); + if (data < 0) + return -EIO; + ctrl->value = !!(data & 0x20); + break; + case V4L2_CID_EXPOSURE_AUTO: + data = reg_read(icd, MT9V022_AEC_AGC_ENABLE); + if (data < 0) + return -EIO; + ctrl->value = !!(data & 0x1); + break; + case V4L2_CID_AUTOGAIN: + data = reg_read(icd, MT9V022_AEC_AGC_ENABLE); + if (data < 0) + return -EIO; + ctrl->value = !!(data & 0x2); + break; + } + return 0; +} + +static int mt9v022_set_control(struct soc_camera_device *icd, + struct v4l2_control *ctrl) +{ + int data; + const struct v4l2_queryctrl *qctrl; + + qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id); + + if (!qctrl) + return -EINVAL; + + switch (ctrl->id) { + case V4L2_CID_VFLIP: + if (ctrl->value) + data = reg_set(icd, MT9V022_READ_MODE, 0x10); + else + data = reg_clear(icd, MT9V022_READ_MODE, 0x10); + if (data < 0) + return -EIO; + break; + case V4L2_CID_HFLIP: + if (ctrl->value) + data = reg_set(icd, MT9V022_READ_MODE, 0x20); + else + data = reg_clear(icd, MT9V022_READ_MODE, 0x20); + if (data < 0) + return -EIO; + break; + case V4L2_CID_GAIN: + /* mt9v022 has minimum == default */ + if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) + return -EINVAL; + else { + unsigned long range = qctrl->maximum - qctrl->minimum; + /* Datasheet says 16 to 64. autogain only works properly + * after setting gain to maximum 14. Larger values + * produce "white fly" noise effect. On the whole, + * manually setting analog gain does no good. */ + unsigned long gain = ((ctrl->value - qctrl->minimum) * + 10 + range / 2) / range + 4; + if (gain >= 32) + gain &= ~1; + /* The user wants to set gain manually, hope, she + * knows, what she's doing... Switch AGC off. */ + + if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0) + return -EIO; + + dev_info(&icd->dev, "Setting gain from %d to %lu\n", + reg_read(icd, MT9V022_ANALOG_GAIN), gain); + if (reg_write(icd, MT9V022_ANALOG_GAIN, gain) < 0) + return -EIO; + icd->gain = ctrl->value; + } + break; + case V4L2_CID_EXPOSURE: + /* mt9v022 has maximum == default */ + if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) + return -EINVAL; + else { + unsigned long range = qctrl->maximum - qctrl->minimum; + unsigned long shutter = ((ctrl->value - qctrl->minimum) * + 479 + range / 2) / range + 1; + /* The user wants to set shutter width manually, hope, + * she knows, what she's doing... Switch AEC off. */ + + if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0) + return -EIO; + + dev_dbg(&icd->dev, "Shutter width from %d to %lu\n", + reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH), + shutter); + if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH, + shutter) < 0) + return -EIO; + icd->exposure = ctrl->value; + } + break; + case V4L2_CID_AUTOGAIN: + if (ctrl->value) + data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2); + else + data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2); + if (data < 0) + return -EIO; + break; + case V4L2_CID_EXPOSURE_AUTO: + if (ctrl->value) + data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1); + else + data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1); + if (data < 0) + return -EIO; + break; + } + return 0; +} + +/* Interface active, can use i2c. If it fails, it can indeed mean, that + * this wasn't our capture interface, so, we wait for the right one */ +static int mt9v022_video_probe(struct soc_camera_device *icd) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + s32 data; + int ret; + + if (!icd->dev.parent || + to_soc_camera_host(icd->dev.parent)->nr != icd->iface) + return -ENODEV; + + /* Read out the chip version register */ + data = reg_read(icd, MT9V022_CHIP_VERSION); + + /* must be 0x1311 or 0x1313 */ + if (data != 0x1311 && data != 0x1313) { + ret = -ENODEV; + dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n", + data); + goto ei2c; + } + + /* Soft reset */ + ret = reg_write(icd, MT9V022_RESET, 1); + if (ret < 0) + goto ei2c; + /* 15 clock cycles */ + udelay(200); + if (reg_read(icd, MT9V022_RESET)) { + dev_err(&icd->dev, "Resetting MT9V022 failed!\n"); + goto ei2c; + } + + /* Set monochrome or colour sensor type */ + if (sensor_type && (!strcmp("colour", sensor_type) || + !strcmp("color", sensor_type))) { + ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11); + mt9v022->model = V4L2_IDENT_MT9V022IX7ATC; + } else { + ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11); + mt9v022->model = V4L2_IDENT_MT9V022IX7ATM; + } + + if (ret >= 0) + ret = soc_camera_video_start(icd); + if (ret < 0) + goto eisis; + + dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n", + data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ? + "monochrome" : "colour"); + + return 0; + +eisis: +ei2c: + return ret; +} + +static void mt9v022_video_remove(struct soc_camera_device *icd) +{ + struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); + + dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr, + mt9v022->icd.dev.parent, mt9v022->icd.vdev); + soc_camera_video_stop(&mt9v022->icd); +} + +static int mt9v022_probe(struct i2c_client *client) +{ + struct mt9v022 *mt9v022; + struct soc_camera_device *icd; + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct soc_camera_link *icl = client->dev.platform_data; + int ret; + + if (!icl) { + dev_err(&client->dev, "MT9V022 driver needs platform data\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { + dev_warn(&adapter->dev, + "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); + return -EIO; + } + + mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL); + if (!mt9v022) + return -ENOMEM; + + mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT; + mt9v022->client = client; + i2c_set_clientdata(client, mt9v022); + + icd = &mt9v022->icd; + icd->probe = mt9v022_video_probe; + icd->remove = mt9v022_video_remove; + icd->ops = &mt9v022_ops; + icd->control = &client->dev; + icd->x_min = 1; + icd->y_min = 4; + icd->x_current = 1; + icd->y_current = 4; + icd->width_min = 48; + icd->width_max = 752; + icd->height_min = 32; + icd->height_max = 480; + icd->y_skip_top = 1; + icd->iface = icl->bus_id; + /* Default datawidth - this is the only width this camera (normally) + * supports. It is only with extra logic that it can support + * other widths. Therefore it seems to be a sensible default. */ + mt9v022->datawidth = 10; + + ret = bus_switch_request(mt9v022, icl); + if (ret) + goto eswinit; + + ret = soc_camera_device_register(icd); + if (ret) + goto eisdr; + + return 0; + +eisdr: + bus_switch_release(mt9v022); +eswinit: + kfree(mt9v022); + return ret; +} + +static int mt9v022_remove(struct i2c_client *client) +{ + struct mt9v022 *mt9v022 = i2c_get_clientdata(client); + + soc_camera_device_unregister(&mt9v022->icd); + bus_switch_release(mt9v022); + kfree(mt9v022); + + return 0; +} + +static struct i2c_driver mt9v022_i2c_driver = { + .driver = { + .name = "mt9v022", + }, + .probe = mt9v022_probe, + .remove = mt9v022_remove, +}; + +static int __init mt9v022_mod_init(void) +{ + return i2c_add_driver(&mt9v022_i2c_driver); +} + +static void __exit mt9v022_mod_exit(void) +{ + i2c_del_driver(&mt9v022_i2c_driver); +} + +module_init(mt9v022_mod_init); +module_exit(mt9v022_mod_exit); + +MODULE_DESCRIPTION("Micron MT9V022 Camera driver"); +MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); +MODULE_LICENSE("GPL"); |