| /* |
| * 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/videodev2.h> |
| |
| #include <media/soc_camera.h> |
| #include <media/soc_mediabus.h> |
| #include <media/v4l2-chip-ident.h> |
| #include <media/v4l2-subdev.h> |
| #include <media/v4l2-ctrls.h> |
| |
| /* |
| * mt9t031 i2c address 0x5d |
| * The platform has to define i2c_board_info and link to it from |
| * struct soc_camera_link |
| */ |
| |
| /* 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 */ |
| int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
| 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) |
| { |
| s32 data = i2c_smbus_read_word_data(client, reg); |
| return data < 0 ? data : swab16(data); |
| } |
| |
| static int reg_write(struct i2c_client *client, const u8 reg, |
| const u16 data) |
| { |
| return i2c_smbus_write_word_data(client, reg, swab16(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_disable(struct i2c_client *client) |
| { |
| /* Disable the chip */ |
| reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
| |
| return 0; |
| } |
| |
| 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 |
| * icd->try_fmt_cap(), soc_camera_s_crop() 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_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
| { |
| struct v4l2_rect rect = a->c; |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9t031 *mt9t031 = to_mt9t031(client); |
| |
| 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_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9t031 *mt9t031 = to_mt9t031(client); |
| |
| a->c = mt9t031->rect; |
| a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| return 0; |
| } |
| |
| static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) |
| { |
| a->bounds.left = MT9T031_COLUMN_SKIP; |
| a->bounds.top = MT9T031_ROW_SKIP; |
| a->bounds.width = MT9T031_MAX_WIDTH; |
| a->bounds.height = MT9T031_MAX_HEIGHT; |
| a->defrect = a->bounds; |
| a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| a->pixelaspect.numerator = 1; |
| a->pixelaspect.denominator = 1; |
| |
| return 0; |
| } |
| |
| static int mt9t031_g_fmt(struct v4l2_subdev *sd, |
| struct v4l2_mbus_framefmt *mf) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9t031 *mt9t031 = to_mt9t031(client); |
| |
| mf->width = mt9t031->rect.width / mt9t031->xskip; |
| mf->height = mt9t031->rect.height / mt9t031->yskip; |
| mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; |
| mf->colorspace = V4L2_COLORSPACE_SRGB; |
| mf->field = V4L2_FIELD_NONE; |
| |
| return 0; |
| } |
| |
| static int mt9t031_s_fmt(struct v4l2_subdev *sd, |
| struct v4l2_mbus_framefmt *mf) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9t031 *mt9t031 = to_mt9t031(client); |
| u16 xskip, yskip; |
| struct v4l2_rect rect = mt9t031->rect; |
| |
| /* |
| * try_fmt has put width and height 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 = V4L2_MBUS_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); |
| } |
| |
| /* |
| * If a user window larger than sensor window is requested, we'll increase the |
| * sensor window. |
| */ |
| static int mt9t031_try_fmt(struct v4l2_subdev *sd, |
| struct v4l2_mbus_framefmt *mf) |
| { |
| v4l_bound_align_image( |
| &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, |
| &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); |
| |
| mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; |
| mf->colorspace = V4L2_COLORSPACE_SRGB; |
| |
| return 0; |
| } |
| |
| static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
| struct v4l2_dbg_chip_ident *id) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9t031 *mt9t031 = to_mt9t031(client); |
| |
| if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
| return -EINVAL; |
| |
| if (id->match.addr != client->addr) |
| return -ENODEV; |
| |
| id->ident = mt9t031->model; |
| id->revision = 0; |
| |
| return 0; |
| } |
| |
| #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->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
| return -EINVAL; |
| |
| if (reg->match.addr != client->addr) |
| return -ENODEV; |
| |
| reg->val = reg_read(client, reg->reg); |
| |
| if (reg->val > 0xffff) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static int mt9t031_s_register(struct v4l2_subdev *sd, |
| struct v4l2_dbg_register *reg) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| |
| if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
| return -EINVAL; |
| |
| if (reg->match.addr != client->addr) |
| return -ENODEV; |
| |
| 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 - 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 - 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 - 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 soc_camera_device *icd = dev_get_drvdata(vdev->parent); |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 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 struct dev_pm_ops mt9t031_dev_pm_ops = { |
| .runtime_suspend = mt9t031_runtime_suspend, |
| .runtime_resume = mt9t031_runtime_resume, |
| }; |
| |
| static struct device_type mt9t031_dev_type = { |
| .name = "MT9T031", |
| .pm = &mt9t031_dev_pm_ops, |
| }; |
| |
| /* |
| * 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); |
| struct video_device *vdev = soc_camera_i2c_to_vdev(client); |
| s32 data; |
| int ret; |
| |
| /* Enable the chip */ |
| data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
| dev_dbg(&client->dev, "write: %d\n", data); |
| |
| /* Read out the chip version register */ |
| data = reg_read(client, MT9T031_CHIP_VERSION); |
| |
| switch (data) { |
| case 0x1621: |
| mt9t031->model = V4L2_IDENT_MT9T031; |
| break; |
| default: |
| dev_err(&client->dev, |
| "No MT9T031 chip detected, register read %x\n", data); |
| return -ENODEV; |
| } |
| |
| dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
| |
| ret = mt9t031_idle(client); |
| if (ret < 0) { |
| dev_err(&client->dev, "Failed to initialise the camera\n"); |
| } else { |
| vdev->dev.type = &mt9t031_dev_type; |
| v4l2_ctrl_handler_setup(&mt9t031->hdl); |
| } |
| 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 struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
| .g_chip_ident = mt9t031_g_chip_ident, |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| .g_register = mt9t031_g_register, |
| .s_register = mt9t031_s_register, |
| #endif |
| }; |
| |
| static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
| enum v4l2_mbus_pixelcode *code) |
| { |
| if (index) |
| return -EINVAL; |
| |
| *code = V4L2_MBUS_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_device *icd = client->dev.platform_data; |
| struct soc_camera_link *icl = to_soc_camera_link(icd); |
| |
| 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(icl, 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_device *icd = client->dev.platform_data; |
| struct soc_camera_link *icl = to_soc_camera_link(icd); |
| |
| if (soc_camera_apply_board_flags(icl, 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 struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { |
| .s_stream = mt9t031_s_stream, |
| .s_mbus_fmt = mt9t031_s_fmt, |
| .g_mbus_fmt = mt9t031_g_fmt, |
| .try_mbus_fmt = mt9t031_try_fmt, |
| .s_crop = mt9t031_s_crop, |
| .g_crop = mt9t031_g_crop, |
| .cropcap = mt9t031_cropcap, |
| .enum_mbus_fmt = mt9t031_enum_fmt, |
| .g_mbus_config = mt9t031_g_mbus_config, |
| .s_mbus_config = mt9t031_s_mbus_config, |
| }; |
| |
| static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { |
| .g_skip_top_lines = mt9t031_g_skip_top_lines, |
| }; |
| |
| static struct v4l2_subdev_ops mt9t031_subdev_ops = { |
| .core = &mt9t031_subdev_core_ops, |
| .video = &mt9t031_subdev_video_ops, |
| .sensor = &mt9t031_subdev_sensor_ops, |
| }; |
| |
| static int mt9t031_probe(struct i2c_client *client, |
| const struct i2c_device_id *did) |
| { |
| struct mt9t031 *mt9t031; |
| struct soc_camera_device *icd = client->dev.platform_data; |
| struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
| int ret; |
| |
| if (icd) { |
| struct soc_camera_link *icl = to_soc_camera_link(icd); |
| if (!icl) { |
| 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 = kzalloc(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) { |
| int err = mt9t031->hdl.error; |
| |
| kfree(mt9t031); |
| return err; |
| } |
| 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_idle(client); |
| |
| ret = mt9t031_video_probe(client); |
| |
| mt9t031_disable(client); |
| |
| if (ret) { |
| v4l2_ctrl_handler_free(&mt9t031->hdl); |
| kfree(mt9t031); |
| } |
| |
| return ret; |
| } |
| |
| static int mt9t031_remove(struct i2c_client *client) |
| { |
| struct mt9t031 *mt9t031 = to_mt9t031(client); |
| |
| v4l2_device_unregister_subdev(&mt9t031->subdev); |
| v4l2_ctrl_handler_free(&mt9t031->hdl); |
| kfree(mt9t031); |
| |
| 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, |
| }; |
| |
| static int __init mt9t031_mod_init(void) |
| { |
| return i2c_add_driver(&mt9t031_i2c_driver); |
| } |
| |
| static void __exit mt9t031_mod_exit(void) |
| { |
| i2c_del_driver(&mt9t031_i2c_driver); |
| } |
| |
| module_init(mt9t031_mod_init); |
| module_exit(mt9t031_mod_exit); |
| |
| MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); |
| MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); |
| MODULE_LICENSE("GPL v2"); |