diff options
Diffstat (limited to 'drivers/media/i2c/soc_camera/mt9t031.c')
| -rw-r--r-- | drivers/media/i2c/soc_camera/mt9t031.c | 858 |
1 files changed, 0 insertions, 858 deletions
diff --git a/drivers/media/i2c/soc_camera/mt9t031.c b/drivers/media/i2c/soc_camera/mt9t031.c deleted file mode 100644 index 4802d30e47de..000000000000 --- a/drivers/media/i2c/soc_camera/mt9t031.c +++ /dev/null @@ -1,858 +0,0 @@ -/* - * Driver for MT9T031 CMOS Image Sensor from Micron - * - * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.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/device.h> -#include <linux/i2c.h> -#include <linux/log2.h> -#include <linux/pm.h> -#include <linux/slab.h> -#include <linux/v4l2-mediabus.h> -#include <linux/videodev2.h> -#include <linux/module.h> - -#include <media/soc_camera.h> -#include <media/v4l2-clk.h> -#include <media/v4l2-subdev.h> -#include <media/v4l2-ctrls.h> - -/* - * ATTENTION: this driver still cannot be used outside of the soc-camera - * framework because of its PM implementation, using the video_device node. - * If hardware becomes available for testing, alternative PM approaches shall - * be considered and tested. - */ - -/* - * mt9t031 i2c address 0x5d - * The platform has to define struct i2c_board_info objects and link to them - * from struct soc_camera_host_desc - */ - -/* mt9t031 selected register addresses */ -#define MT9T031_CHIP_VERSION 0x00 -#define MT9T031_ROW_START 0x01 -#define MT9T031_COLUMN_START 0x02 -#define MT9T031_WINDOW_HEIGHT 0x03 -#define MT9T031_WINDOW_WIDTH 0x04 -#define MT9T031_HORIZONTAL_BLANKING 0x05 -#define MT9T031_VERTICAL_BLANKING 0x06 -#define MT9T031_OUTPUT_CONTROL 0x07 -#define MT9T031_SHUTTER_WIDTH_UPPER 0x08 -#define MT9T031_SHUTTER_WIDTH 0x09 -#define MT9T031_PIXEL_CLOCK_CONTROL 0x0a -#define MT9T031_FRAME_RESTART 0x0b -#define MT9T031_SHUTTER_DELAY 0x0c -#define MT9T031_RESET 0x0d -#define MT9T031_READ_MODE_1 0x1e -#define MT9T031_READ_MODE_2 0x20 -#define MT9T031_READ_MODE_3 0x21 -#define MT9T031_ROW_ADDRESS_MODE 0x22 -#define MT9T031_COLUMN_ADDRESS_MODE 0x23 -#define MT9T031_GLOBAL_GAIN 0x35 -#define MT9T031_CHIP_ENABLE 0xF8 - -#define MT9T031_MAX_HEIGHT 1536 -#define MT9T031_MAX_WIDTH 2048 -#define MT9T031_MIN_HEIGHT 2 -#define MT9T031_MIN_WIDTH 18 -#define MT9T031_HORIZONTAL_BLANK 142 -#define MT9T031_VERTICAL_BLANK 25 -#define MT9T031_COLUMN_SKIP 32 -#define MT9T031_ROW_SKIP 20 - -struct mt9t031 { - struct v4l2_subdev subdev; - struct v4l2_ctrl_handler hdl; - struct { - /* exposure/auto-exposure cluster */ - struct v4l2_ctrl *autoexposure; - struct v4l2_ctrl *exposure; - }; - struct v4l2_rect rect; /* Sensor window */ - struct v4l2_clk *clk; - u16 xskip; - u16 yskip; - unsigned int total_h; - unsigned short y_skip_top; /* Lines to skip at the top */ -}; - -static struct mt9t031 *to_mt9t031(const struct i2c_client *client) -{ - return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); -} - -static int reg_read(struct i2c_client *client, const u8 reg) -{ - return i2c_smbus_read_word_swapped(client, reg); -} - -static int reg_write(struct i2c_client *client, const u8 reg, - const u16 data) -{ - return i2c_smbus_write_word_swapped(client, reg, data); -} - -static int reg_set(struct i2c_client *client, const u8 reg, - const u16 data) -{ - int ret; - - ret = reg_read(client, reg); - if (ret < 0) - return ret; - return reg_write(client, reg, ret | data); -} - -static int reg_clear(struct i2c_client *client, const u8 reg, - const u16 data) -{ - int ret; - - ret = reg_read(client, reg); - if (ret < 0) - return ret; - return reg_write(client, reg, ret & ~data); -} - -static int set_shutter(struct i2c_client *client, const u32 data) -{ - int ret; - - ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); - - if (ret >= 0) - ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); - - return ret; -} - -static int get_shutter(struct i2c_client *client, u32 *data) -{ - int ret; - - ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); - *data = ret << 16; - - if (ret >= 0) - ret = reg_read(client, MT9T031_SHUTTER_WIDTH); - *data |= ret & 0xffff; - - return ret < 0 ? ret : 0; -} - -static int mt9t031_idle(struct i2c_client *client) -{ - int ret; - - /* Disable chip output, synchronous option update */ - ret = reg_write(client, MT9T031_RESET, 1); - if (ret >= 0) - ret = reg_write(client, MT9T031_RESET, 0); - if (ret >= 0) - ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); - - return ret >= 0 ? 0 : -EIO; -} - -static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - int ret; - - if (enable) - /* Switch to master "normal" mode */ - ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); - else - /* Stop sensor readout */ - ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); - - if (ret < 0) - return -EIO; - - return 0; -} - -/* target must be _even_ */ -static u16 mt9t031_skip(s32 *source, s32 target, s32 max) -{ - unsigned int skip; - - if (*source < target + target / 2) { - *source = target; - return 1; - } - - skip = min(max, *source + target / 2) / target; - if (skip > 8) - skip = 8; - *source = target * skip; - - return skip; -} - -/* rect is the sensor rectangle, the caller guarantees parameter validity */ -static int mt9t031_set_params(struct i2c_client *client, - struct v4l2_rect *rect, u16 xskip, u16 yskip) -{ - struct mt9t031 *mt9t031 = to_mt9t031(client); - int ret; - u16 xbin, ybin; - const u16 hblank = MT9T031_HORIZONTAL_BLANK, - vblank = MT9T031_VERTICAL_BLANK; - - xbin = min(xskip, (u16)3); - ybin = min(yskip, (u16)3); - - /* - * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. - * There is always a valid suitably aligned value. The worst case is - * xbin = 3, width = 2048. Then we will start at 36, the last read out - * pixel will be 2083, which is < 2085 - first black pixel. - * - * MT9T031 datasheet imposes window left border alignment, depending on - * the selected xskip. Failing to conform to this requirement produces - * dark horizontal stripes in the image. However, even obeying to this - * requirement doesn't eliminate the stripes in all configurations. They - * appear "locally reproducibly," but can differ between tests under - * different lighting conditions. - */ - switch (xbin) { - case 1: - rect->left &= ~1; - break; - case 2: - rect->left &= ~3; - break; - case 3: - rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? - (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); - } - - rect->top &= ~1; - - dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", - xskip, yskip, rect->width, rect->height, rect->left, rect->top); - - /* Disable register update, reconfigure atomically */ - ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); - if (ret < 0) - return ret; - - /* Blanking and start values - default... */ - ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); - if (ret >= 0) - ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); - - if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { - /* Binning, skipping */ - if (ret >= 0) - ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, - ((xbin - 1) << 4) | (xskip - 1)); - if (ret >= 0) - ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, - ((ybin - 1) << 4) | (yskip - 1)); - } - dev_dbg(&client->dev, "new physical left %u, top %u\n", - rect->left, rect->top); - - /* - * The caller provides a supported format, as guaranteed by - * .set_fmt(FORMAT_TRY), soc_camera_s_selection() and soc_camera_cropcap() - */ - if (ret >= 0) - ret = reg_write(client, MT9T031_COLUMN_START, rect->left); - if (ret >= 0) - ret = reg_write(client, MT9T031_ROW_START, rect->top); - if (ret >= 0) - ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); - if (ret >= 0) - ret = reg_write(client, MT9T031_WINDOW_HEIGHT, - rect->height + mt9t031->y_skip_top - 1); - if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) { - mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank; - - ret = set_shutter(client, mt9t031->total_h); - } - - /* Re-enable register update, commit all changes */ - if (ret >= 0) - ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); - - if (ret >= 0) { - mt9t031->rect = *rect; - mt9t031->xskip = xskip; - mt9t031->yskip = yskip; - } - - return ret < 0 ? ret : 0; -} - -static int mt9t031_set_selection(struct v4l2_subdev *sd, - struct v4l2_subdev_pad_config *cfg, - struct v4l2_subdev_selection *sel) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9t031 *mt9t031 = to_mt9t031(client); - struct v4l2_rect rect = sel->r; - - if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || - sel->target != V4L2_SEL_TGT_CROP) - return -EINVAL; - - rect.width = ALIGN(rect.width, 2); - rect.height = ALIGN(rect.height, 2); - - soc_camera_limit_side(&rect.left, &rect.width, - MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); - - soc_camera_limit_side(&rect.top, &rect.height, - MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); - - return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip); -} - -static int mt9t031_get_selection(struct v4l2_subdev *sd, - struct v4l2_subdev_pad_config *cfg, - struct v4l2_subdev_selection *sel) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9t031 *mt9t031 = to_mt9t031(client); - - if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) - return -EINVAL; - - switch (sel->target) { - case V4L2_SEL_TGT_CROP_BOUNDS: - case V4L2_SEL_TGT_CROP_DEFAULT: - sel->r.left = MT9T031_COLUMN_SKIP; - sel->r.top = MT9T031_ROW_SKIP; - sel->r.width = MT9T031_MAX_WIDTH; - sel->r.height = MT9T031_MAX_HEIGHT; - return 0; - case V4L2_SEL_TGT_CROP: - sel->r = mt9t031->rect; - return 0; - default: - return -EINVAL; - } -} - -static int mt9t031_get_fmt(struct v4l2_subdev *sd, - struct v4l2_subdev_pad_config *cfg, - struct v4l2_subdev_format *format) -{ - struct v4l2_mbus_framefmt *mf = &format->format; - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9t031 *mt9t031 = to_mt9t031(client); - - if (format->pad) - return -EINVAL; - - mf->width = mt9t031->rect.width / mt9t031->xskip; - mf->height = mt9t031->rect.height / mt9t031->yskip; - mf->code = MEDIA_BUS_FMT_SBGGR10_1X10; - mf->colorspace = V4L2_COLORSPACE_SRGB; - mf->field = V4L2_FIELD_NONE; - - return 0; -} - -/* - * If a user window larger than sensor window is requested, we'll increase the - * sensor window. - */ -static int mt9t031_set_fmt(struct v4l2_subdev *sd, - struct v4l2_subdev_pad_config *cfg, - struct v4l2_subdev_format *format) -{ - struct v4l2_mbus_framefmt *mf = &format->format; - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9t031 *mt9t031 = to_mt9t031(client); - u16 xskip, yskip; - struct v4l2_rect rect = mt9t031->rect; - - if (format->pad) - return -EINVAL; - - mf->code = MEDIA_BUS_FMT_SBGGR10_1X10; - mf->colorspace = V4L2_COLORSPACE_SRGB; - v4l_bound_align_image( - &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, - &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); - - if (format->which == V4L2_SUBDEV_FORMAT_TRY) { - cfg->try_fmt = *mf; - return 0; - } - - /* - * Width and height are within limits. - * S_FMT: use binning and skipping for scaling - */ - xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH); - yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT); - - mf->code = MEDIA_BUS_FMT_SBGGR10_1X10; - mf->colorspace = V4L2_COLORSPACE_SRGB; - - /* mt9t031_set_params() doesn't change width and height */ - return mt9t031_set_params(client, &rect, xskip, yskip); -} - -#ifdef CONFIG_VIDEO_ADV_DEBUG -static int mt9t031_g_register(struct v4l2_subdev *sd, - struct v4l2_dbg_register *reg) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - if (reg->reg > 0xff) - return -EINVAL; - - reg->size = 1; - reg->val = reg_read(client, reg->reg); - - if (reg->val > 0xffff) - return -EIO; - - return 0; -} - -static int mt9t031_s_register(struct v4l2_subdev *sd, - const struct v4l2_dbg_register *reg) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - if (reg->reg > 0xff) - return -EINVAL; - - if (reg_write(client, reg->reg, reg->val) < 0) - return -EIO; - - return 0; -} -#endif - -static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl) -{ - struct mt9t031 *mt9t031 = container_of(ctrl->handler, - struct mt9t031, hdl); - const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK; - s32 min, max; - - switch (ctrl->id) { - case V4L2_CID_EXPOSURE_AUTO: - min = mt9t031->exposure->minimum; - max = mt9t031->exposure->maximum; - mt9t031->exposure->val = - (shutter_max / 2 + (mt9t031->total_h - 1) * (max - min)) - / shutter_max + min; - break; - } - return 0; -} - -static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl) -{ - struct mt9t031 *mt9t031 = container_of(ctrl->handler, - struct mt9t031, hdl); - struct v4l2_subdev *sd = &mt9t031->subdev; - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct v4l2_ctrl *exp = mt9t031->exposure; - int data; - - switch (ctrl->id) { - case V4L2_CID_VFLIP: - if (ctrl->val) - data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); - else - data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); - if (data < 0) - return -EIO; - return 0; - case V4L2_CID_HFLIP: - if (ctrl->val) - data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); - else - data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); - if (data < 0) - return -EIO; - return 0; - case V4L2_CID_GAIN: - /* See Datasheet Table 7, Gain settings. */ - if (ctrl->val <= ctrl->default_value) { - /* Pack it into 0..1 step 0.125, register values 0..8 */ - unsigned long range = ctrl->default_value - ctrl->minimum; - data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range; - - dev_dbg(&client->dev, "Setting gain %d\n", data); - data = reg_write(client, MT9T031_GLOBAL_GAIN, data); - if (data < 0) - return -EIO; - } else { - /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ - /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ - unsigned long range = ctrl->maximum - ctrl->default_value - 1; - /* calculated gain: map 65..127 to 9..1024 step 0.125 */ - unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) * - 1015 + range / 2) / range + 9; - - if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ - data = gain; - else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ - data = ((gain - 32) * 16 + 16) / 32 + 80; - else - /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ - data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; - - dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", - reg_read(client, MT9T031_GLOBAL_GAIN), data); - data = reg_write(client, MT9T031_GLOBAL_GAIN, data); - if (data < 0) - return -EIO; - } - return 0; - - case V4L2_CID_EXPOSURE_AUTO: - if (ctrl->val == V4L2_EXPOSURE_MANUAL) { - unsigned int range = exp->maximum - exp->minimum; - unsigned int shutter = ((exp->val - (s32)exp->minimum) * 1048 + - range / 2) / range + 1; - u32 old; - - get_shutter(client, &old); - dev_dbg(&client->dev, "Set shutter from %u to %u\n", - old, shutter); - if (set_shutter(client, shutter) < 0) - return -EIO; - } else { - const u16 vblank = MT9T031_VERTICAL_BLANK; - mt9t031->total_h = mt9t031->rect.height + - mt9t031->y_skip_top + vblank; - - if (set_shutter(client, mt9t031->total_h) < 0) - return -EIO; - } - return 0; - default: - return -EINVAL; - } - return 0; -} - -/* - * Power Management: - * This function does nothing for now but must be present for pm to work - */ -static int mt9t031_runtime_suspend(struct device *dev) -{ - return 0; -} - -/* - * Power Management: - * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged - * they are however changed at reset if the platform hook is present - * thus we rewrite them with the values stored by the driver - */ -static int mt9t031_runtime_resume(struct device *dev) -{ - struct video_device *vdev = to_video_device(dev); - struct v4l2_subdev *sd = soc_camera_vdev_to_subdev(vdev); - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9t031 *mt9t031 = to_mt9t031(client); - - int ret; - u16 xbin, ybin; - - xbin = min(mt9t031->xskip, (u16)3); - ybin = min(mt9t031->yskip, (u16)3); - - ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, - ((xbin - 1) << 4) | (mt9t031->xskip - 1)); - if (ret < 0) - return ret; - - ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, - ((ybin - 1) << 4) | (mt9t031->yskip - 1)); - if (ret < 0) - return ret; - - return 0; -} - -static const struct dev_pm_ops mt9t031_dev_pm_ops = { - .runtime_suspend = mt9t031_runtime_suspend, - .runtime_resume = mt9t031_runtime_resume, -}; - -static const struct device_type mt9t031_dev_type = { - .name = "MT9T031", - .pm = &mt9t031_dev_pm_ops, -}; - -static int mt9t031_s_power(struct v4l2_subdev *sd, int on) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); - struct video_device *vdev = soc_camera_i2c_to_vdev(client); - struct mt9t031 *mt9t031 = to_mt9t031(client); - int ret; - - if (on) { - ret = soc_camera_power_on(&client->dev, ssdd, mt9t031->clk); - if (ret < 0) - return ret; - if (vdev) - /* Not needed during probing, when vdev isn't available yet */ - vdev->dev.type = &mt9t031_dev_type; - } else { - if (vdev) - vdev->dev.type = NULL; - soc_camera_power_off(&client->dev, ssdd, mt9t031->clk); - } - - 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 mt9t031_video_probe(struct i2c_client *client) -{ - struct mt9t031 *mt9t031 = to_mt9t031(client); - s32 data; - int ret; - - ret = mt9t031_s_power(&mt9t031->subdev, 1); - if (ret < 0) - return ret; - - ret = mt9t031_idle(client); - if (ret < 0) { - dev_err(&client->dev, "Failed to initialise the camera\n"); - goto done; - } - - /* Read out the chip version register */ - data = reg_read(client, MT9T031_CHIP_VERSION); - - switch (data) { - case 0x1621: - break; - default: - dev_err(&client->dev, - "No MT9T031 chip detected, register read %x\n", data); - ret = -ENODEV; - goto done; - } - - dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); - - ret = v4l2_ctrl_handler_setup(&mt9t031->hdl); - -done: - mt9t031_s_power(&mt9t031->subdev, 0); - - return ret; -} - -static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9t031 *mt9t031 = to_mt9t031(client); - - *lines = mt9t031->y_skip_top; - - return 0; -} - -static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = { - .g_volatile_ctrl = mt9t031_g_volatile_ctrl, - .s_ctrl = mt9t031_s_ctrl, -}; - -static const struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { - .s_power = mt9t031_s_power, -#ifdef CONFIG_VIDEO_ADV_DEBUG - .g_register = mt9t031_g_register, - .s_register = mt9t031_s_register, -#endif -}; - -static int mt9t031_enum_mbus_code(struct v4l2_subdev *sd, - struct v4l2_subdev_pad_config *cfg, - struct v4l2_subdev_mbus_code_enum *code) -{ - if (code->pad || code->index) - return -EINVAL; - - code->code = MEDIA_BUS_FMT_SBGGR10_1X10; - return 0; -} - -static int mt9t031_g_mbus_config(struct v4l2_subdev *sd, - struct v4l2_mbus_config *cfg) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); - - cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING | - V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH | - V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH; - cfg->type = V4L2_MBUS_PARALLEL; - cfg->flags = soc_camera_apply_board_flags(ssdd, cfg); - - return 0; -} - -static int mt9t031_s_mbus_config(struct v4l2_subdev *sd, - const struct v4l2_mbus_config *cfg) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); - - if (soc_camera_apply_board_flags(ssdd, cfg) & - V4L2_MBUS_PCLK_SAMPLE_FALLING) - return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); - else - return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); -} - -static const struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { - .s_stream = mt9t031_s_stream, - .g_mbus_config = mt9t031_g_mbus_config, - .s_mbus_config = mt9t031_s_mbus_config, -}; - -static const struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { - .g_skip_top_lines = mt9t031_g_skip_top_lines, -}; - -static const struct v4l2_subdev_pad_ops mt9t031_subdev_pad_ops = { - .enum_mbus_code = mt9t031_enum_mbus_code, - .get_selection = mt9t031_get_selection, - .set_selection = mt9t031_set_selection, - .get_fmt = mt9t031_get_fmt, - .set_fmt = mt9t031_set_fmt, -}; - -static const struct v4l2_subdev_ops mt9t031_subdev_ops = { - .core = &mt9t031_subdev_core_ops, - .video = &mt9t031_subdev_video_ops, - .sensor = &mt9t031_subdev_sensor_ops, - .pad = &mt9t031_subdev_pad_ops, -}; - -static int mt9t031_probe(struct i2c_client *client, - const struct i2c_device_id *did) -{ - struct mt9t031 *mt9t031; - struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); - struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); - int ret; - - if (!ssdd) { - dev_err(&client->dev, "MT9T031 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; - } - - mt9t031 = devm_kzalloc(&client->dev, sizeof(struct mt9t031), GFP_KERNEL); - if (!mt9t031) - return -ENOMEM; - - v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); - v4l2_ctrl_handler_init(&mt9t031->hdl, 5); - v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, - V4L2_CID_VFLIP, 0, 1, 1, 0); - v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, - V4L2_CID_HFLIP, 0, 1, 1, 0); - v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, - V4L2_CID_GAIN, 0, 127, 1, 64); - - /* - * Simulated autoexposure. If enabled, we calculate shutter width - * ourselves in the driver based on vertical blanking and frame width - */ - mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl, - &mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, - V4L2_EXPOSURE_AUTO); - mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, - V4L2_CID_EXPOSURE, 1, 255, 1, 255); - - mt9t031->subdev.ctrl_handler = &mt9t031->hdl; - if (mt9t031->hdl.error) - return mt9t031->hdl.error; - - v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure, - V4L2_EXPOSURE_MANUAL, true); - - mt9t031->y_skip_top = 0; - mt9t031->rect.left = MT9T031_COLUMN_SKIP; - mt9t031->rect.top = MT9T031_ROW_SKIP; - mt9t031->rect.width = MT9T031_MAX_WIDTH; - mt9t031->rect.height = MT9T031_MAX_HEIGHT; - - mt9t031->xskip = 1; - mt9t031->yskip = 1; - - mt9t031->clk = v4l2_clk_get(&client->dev, "mclk"); - if (IS_ERR(mt9t031->clk)) { - ret = PTR_ERR(mt9t031->clk); - goto eclkget; - } - - ret = mt9t031_video_probe(client); - if (ret) { - v4l2_clk_put(mt9t031->clk); -eclkget: - v4l2_ctrl_handler_free(&mt9t031->hdl); - } - - return ret; -} - -static int mt9t031_remove(struct i2c_client *client) -{ - struct mt9t031 *mt9t031 = to_mt9t031(client); - - v4l2_clk_put(mt9t031->clk); - v4l2_device_unregister_subdev(&mt9t031->subdev); - v4l2_ctrl_handler_free(&mt9t031->hdl); - - return 0; -} - -static const struct i2c_device_id mt9t031_id[] = { - { "mt9t031", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, mt9t031_id); - -static struct i2c_driver mt9t031_i2c_driver = { - .driver = { - .name = "mt9t031", - }, - .probe = mt9t031_probe, - .remove = mt9t031_remove, - .id_table = mt9t031_id, -}; - -module_i2c_driver(mt9t031_i2c_driver); - -MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); -MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); -MODULE_LICENSE("GPL v2"); |