| /* |
| * 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> |
| |
| #ifdef CONFIG_MT9M001_PCA9536_SWITCH |
| #include <asm/gpio.h> |
| #endif |
| |
| /* 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_colour_formats[] = { |
| /* Order important: first natively supported, |
| * second supported with a GPIO extender */ |
| { |
| .name = "Bayer (sRGB) 10 bit", |
| .depth = 10, |
| .fourcc = V4L2_PIX_FMT_SBGGR16, |
| .colorspace = V4L2_COLORSPACE_SRGB, |
| }, { |
| .name = "Bayer (sRGB) 8 bit", |
| .depth = 8, |
| .fourcc = V4L2_PIX_FMT_SBGGR8, |
| .colorspace = V4L2_COLORSPACE_SRGB, |
| } |
| }; |
| |
| static const struct soc_camera_data_format mt9v022_monochrome_formats[] = { |
| /* Order important - see above */ |
| { |
| .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_is_valid(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 = -EINVAL; |
| #endif |
| return 0; |
| } |
| |
| static void bus_switch_release(struct mt9v022 *mt9v022) |
| { |
| #ifdef CONFIG_MT9V022_PCA9536_SWITCH |
| if (gpio_is_valid(mt9v022->switch_gpio)) |
| gpio_free(mt9v022->switch_gpio); |
| #endif |
| } |
| |
| static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit) |
| { |
| #ifdef CONFIG_MT9V022_PCA9536_SWITCH |
| if (!gpio_is_valid(mt9v022->switch_gpio)) |
| return -ENODEV; |
| |
| gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit); |
| return 0; |
| #else |
| return -ENODEV; |
| #endif |
| } |
| |
| static int bus_switch_possible(struct mt9v022 *mt9v022) |
| { |
| #ifdef CONFIG_MT9V022_PCA9536_SWITCH |
| return gpio_is_valid(mt9v022->switch_gpio); |
| #else |
| return 0; |
| #endif |
| } |
| |
| static int mt9v022_set_bus_param(struct soc_camera_device *icd, |
| unsigned long flags) |
| { |
| struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); |
| unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK; |
| int ret; |
| u16 pixclk = 0; |
| |
| /* Only one width bit may be set */ |
| if (!is_power_of_2(width_flag)) |
| return -EINVAL; |
| |
| if ((mt9v022->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) || |
| (mt9v022->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) || |
| (mt9v022->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) { |
| /* Well, we actually only can do 10 or 8 bits... */ |
| if (width_flag == SOCAM_DATAWIDTH_9) |
| return -EINVAL; |
| |
| ret = bus_switch_act(mt9v022, |
| width_flag == SOCAM_DATAWIDTH_8); |
| if (ret < 0) |
| return ret; |
| |
| mt9v022->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10; |
| } |
| |
| if (flags & SOCAM_PCLK_SAMPLE_RISING) |
| pixclk |= 0x10; |
| |
| if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH)) |
| pixclk |= 0x1; |
| |
| if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH)) |
| pixclk |= 0x2; |
| |
| ret = reg_write(icd, MT9V022_PIXCLK_FV_LV, pixclk); |
| if (ret < 0) |
| return ret; |
| |
| if (!(flags & SOCAM_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 unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd) |
| { |
| struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); |
| unsigned int width_flag = SOCAM_DATAWIDTH_10; |
| |
| if (bus_switch_possible(mt9v022)) |
| width_flag |= SOCAM_DATAWIDTH_8; |
| |
| return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | |
| SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW | |
| SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | |
| SOCAM_MASTER | SOCAM_SLAVE | |
| width_flag; |
| } |
| |
| static int mt9v022_set_fmt_cap(struct soc_camera_device *icd, |
| __u32 pixfmt, struct v4l2_rect *rect) |
| { |
| struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); |
| int ret; |
| |
| /* 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); |
| |
| 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 |
| |
| 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_video_probe(struct soc_camera_device *); |
| static void mt9v022_video_remove(struct soc_camera_device *); |
| static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *); |
| static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *); |
| |
| static struct soc_camera_ops mt9v022_ops = { |
| .owner = THIS_MODULE, |
| .probe = mt9v022_video_probe, |
| .remove = mt9v022_video_remove, |
| .init = mt9v022_init, |
| .release = mt9v022_release, |
| .start_capture = mt9v022_start_capture, |
| .stop_capture = mt9v022_stop_capture, |
| .set_fmt_cap = mt9v022_set_fmt_cap, |
| .try_fmt_cap = mt9v022_try_fmt_cap, |
| .set_bus_param = mt9v022_set_bus_param, |
| .query_bus_param = mt9v022_query_bus_param, |
| .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; |
| icd->formats = mt9v022_colour_formats; |
| if (mt9v022->client->dev.platform_data) |
| icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats); |
| else |
| icd->num_formats = 1; |
| } else { |
| ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11); |
| mt9v022->model = V4L2_IDENT_MT9V022IX7ATM; |
| icd->formats = mt9v022_monochrome_formats; |
| if (mt9v022->client->dev.platform_data) |
| icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats); |
| else |
| icd->num_formats = 1; |
| } |
| |
| 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, |
| const struct i2c_device_id *did) |
| { |
| 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->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"); |