| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Driver for MT9M001 CMOS Image Sensor from Micron |
| * |
| * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/delay.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/i2c.h> |
| #include <linux/log2.h> |
| #include <linux/module.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/slab.h> |
| #include <linux/videodev2.h> |
| |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-event.h> |
| #include <media/v4l2-subdev.h> |
| |
| /* |
| * mt9m001 i2c address 0x5d |
| */ |
| |
| /* mt9m001 selected register addresses */ |
| #define MT9M001_CHIP_VERSION 0x00 |
| #define MT9M001_ROW_START 0x01 |
| #define MT9M001_COLUMN_START 0x02 |
| #define MT9M001_WINDOW_HEIGHT 0x03 |
| #define MT9M001_WINDOW_WIDTH 0x04 |
| #define MT9M001_HORIZONTAL_BLANKING 0x05 |
| #define MT9M001_VERTICAL_BLANKING 0x06 |
| #define MT9M001_OUTPUT_CONTROL 0x07 |
| #define MT9M001_SHUTTER_WIDTH 0x09 |
| #define MT9M001_FRAME_RESTART 0x0b |
| #define MT9M001_SHUTTER_DELAY 0x0c |
| #define MT9M001_RESET 0x0d |
| #define MT9M001_READ_OPTIONS1 0x1e |
| #define MT9M001_READ_OPTIONS2 0x20 |
| #define MT9M001_GLOBAL_GAIN 0x35 |
| #define MT9M001_CHIP_ENABLE 0xF1 |
| |
| #define MT9M001_MAX_WIDTH 1280 |
| #define MT9M001_MAX_HEIGHT 1024 |
| #define MT9M001_MIN_WIDTH 48 |
| #define MT9M001_MIN_HEIGHT 32 |
| #define MT9M001_COLUMN_SKIP 20 |
| #define MT9M001_ROW_SKIP 12 |
| #define MT9M001_DEFAULT_HBLANK 9 |
| #define MT9M001_DEFAULT_VBLANK 25 |
| |
| /* MT9M001 has only one fixed colorspace per pixelcode */ |
| struct mt9m001_datafmt { |
| u32 code; |
| enum v4l2_colorspace colorspace; |
| }; |
| |
| /* Find a data format by a pixel code in an array */ |
| static const struct mt9m001_datafmt *mt9m001_find_datafmt( |
| u32 code, const struct mt9m001_datafmt *fmt, |
| int n) |
| { |
| int i; |
| for (i = 0; i < n; i++) |
| if (fmt[i].code == code) |
| return fmt + i; |
| |
| return NULL; |
| } |
| |
| static const struct mt9m001_datafmt mt9m001_colour_fmts[] = { |
| /* |
| * Order important: first natively supported, |
| * second supported with a GPIO extender |
| */ |
| {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB}, |
| {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB}, |
| }; |
| |
| static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = { |
| /* Order important - see above */ |
| {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG}, |
| {MEDIA_BUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG}, |
| }; |
| |
| struct mt9m001 { |
| struct v4l2_subdev subdev; |
| struct v4l2_ctrl_handler hdl; |
| struct { |
| /* exposure/auto-exposure cluster */ |
| struct v4l2_ctrl *autoexposure; |
| struct v4l2_ctrl *exposure; |
| }; |
| bool streaming; |
| struct mutex mutex; |
| struct v4l2_rect rect; /* Sensor window */ |
| struct clk *clk; |
| struct gpio_desc *standby_gpio; |
| struct gpio_desc *reset_gpio; |
| const struct mt9m001_datafmt *fmt; |
| const struct mt9m001_datafmt *fmts; |
| int num_fmts; |
| unsigned int total_h; |
| unsigned short y_skip_top; /* Lines to skip at the top */ |
| struct media_pad pad; |
| }; |
| |
| static struct mt9m001 *to_mt9m001(const struct i2c_client *client) |
| { |
| return container_of(i2c_get_clientdata(client), struct mt9m001, 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); |
| } |
| |
| struct mt9m001_reg { |
| u8 reg; |
| u16 data; |
| }; |
| |
| static int multi_reg_write(struct i2c_client *client, |
| const struct mt9m001_reg *regs, int num) |
| { |
| int i; |
| |
| for (i = 0; i < num; i++) { |
| int ret = reg_write(client, regs[i].reg, regs[i].data); |
| |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int mt9m001_init(struct i2c_client *client) |
| { |
| static const struct mt9m001_reg init_regs[] = { |
| /* |
| * Issue a soft reset. This returns all registers to their |
| * default values. |
| */ |
| { MT9M001_RESET, 1 }, |
| { MT9M001_RESET, 0 }, |
| /* Disable chip, synchronous option update */ |
| { MT9M001_OUTPUT_CONTROL, 0 } |
| }; |
| |
| dev_dbg(&client->dev, "%s\n", __func__); |
| |
| return multi_reg_write(client, init_regs, ARRAY_SIZE(init_regs)); |
| } |
| |
| static int mt9m001_apply_selection(struct v4l2_subdev *sd) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| const struct mt9m001_reg regs[] = { |
| /* Blanking and start values - default... */ |
| { MT9M001_HORIZONTAL_BLANKING, MT9M001_DEFAULT_HBLANK }, |
| { MT9M001_VERTICAL_BLANKING, MT9M001_DEFAULT_VBLANK }, |
| /* |
| * The caller provides a supported format, as verified per |
| * call to .set_fmt(FORMAT_TRY). |
| */ |
| { MT9M001_COLUMN_START, mt9m001->rect.left }, |
| { MT9M001_ROW_START, mt9m001->rect.top }, |
| { MT9M001_WINDOW_WIDTH, mt9m001->rect.width - 1 }, |
| { MT9M001_WINDOW_HEIGHT, |
| mt9m001->rect.height + mt9m001->y_skip_top - 1 }, |
| }; |
| |
| return multi_reg_write(client, regs, ARRAY_SIZE(regs)); |
| } |
| |
| static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| int ret = 0; |
| |
| mutex_lock(&mt9m001->mutex); |
| |
| if (mt9m001->streaming == enable) |
| goto done; |
| |
| if (enable) { |
| ret = pm_runtime_resume_and_get(&client->dev); |
| if (ret < 0) |
| goto unlock; |
| |
| ret = mt9m001_apply_selection(sd); |
| if (ret) |
| goto put_unlock; |
| |
| ret = __v4l2_ctrl_handler_setup(&mt9m001->hdl); |
| if (ret) |
| goto put_unlock; |
| |
| /* Switch to master "normal" mode */ |
| ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 2); |
| if (ret < 0) |
| goto put_unlock; |
| } else { |
| /* Switch to master stop sensor readout */ |
| reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
| pm_runtime_put(&client->dev); |
| } |
| |
| mt9m001->streaming = enable; |
| done: |
| mutex_unlock(&mt9m001->mutex); |
| |
| return 0; |
| |
| put_unlock: |
| pm_runtime_put(&client->dev); |
| unlock: |
| mutex_unlock(&mt9m001->mutex); |
| |
| return ret; |
| } |
| |
| static int mt9m001_set_selection(struct v4l2_subdev *sd, |
| struct v4l2_subdev_state *sd_state, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| struct v4l2_rect rect = sel->r; |
| |
| if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || |
| sel->target != V4L2_SEL_TGT_CROP) |
| return -EINVAL; |
| |
| if (mt9m001->fmts == mt9m001_colour_fmts) |
| /* |
| * Bayer format - even number of rows for simplicity, |
| * but let the user play with the top row. |
| */ |
| rect.height = ALIGN(rect.height, 2); |
| |
| /* Datasheet requirement: see register description */ |
| rect.width = ALIGN(rect.width, 2); |
| rect.left = ALIGN(rect.left, 2); |
| |
| rect.width = clamp_t(u32, rect.width, MT9M001_MIN_WIDTH, |
| MT9M001_MAX_WIDTH); |
| rect.left = clamp_t(u32, rect.left, MT9M001_COLUMN_SKIP, |
| MT9M001_COLUMN_SKIP + MT9M001_MAX_WIDTH - rect.width); |
| |
| rect.height = clamp_t(u32, rect.height, MT9M001_MIN_HEIGHT, |
| MT9M001_MAX_HEIGHT); |
| rect.top = clamp_t(u32, rect.top, MT9M001_ROW_SKIP, |
| MT9M001_ROW_SKIP + MT9M001_MAX_HEIGHT - rect.height); |
| |
| mt9m001->total_h = rect.height + mt9m001->y_skip_top + |
| MT9M001_DEFAULT_VBLANK; |
| |
| mt9m001->rect = rect; |
| |
| return 0; |
| } |
| |
| static int mt9m001_get_selection(struct v4l2_subdev *sd, |
| struct v4l2_subdev_state *sd_state, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| |
| if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) |
| return -EINVAL; |
| |
| switch (sel->target) { |
| case V4L2_SEL_TGT_CROP_BOUNDS: |
| sel->r.left = MT9M001_COLUMN_SKIP; |
| sel->r.top = MT9M001_ROW_SKIP; |
| sel->r.width = MT9M001_MAX_WIDTH; |
| sel->r.height = MT9M001_MAX_HEIGHT; |
| return 0; |
| case V4L2_SEL_TGT_CROP: |
| sel->r = mt9m001->rect; |
| return 0; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int mt9m001_get_fmt(struct v4l2_subdev *sd, |
| struct v4l2_subdev_state *sd_state, |
| struct v4l2_subdev_format *format) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| struct v4l2_mbus_framefmt *mf = &format->format; |
| |
| if (format->pad) |
| return -EINVAL; |
| |
| if (format->which == V4L2_SUBDEV_FORMAT_TRY) { |
| mf = v4l2_subdev_get_try_format(sd, sd_state, 0); |
| format->format = *mf; |
| return 0; |
| } |
| |
| mf->width = mt9m001->rect.width; |
| mf->height = mt9m001->rect.height; |
| mf->code = mt9m001->fmt->code; |
| mf->colorspace = mt9m001->fmt->colorspace; |
| mf->field = V4L2_FIELD_NONE; |
| mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; |
| mf->quantization = V4L2_QUANTIZATION_DEFAULT; |
| mf->xfer_func = V4L2_XFER_FUNC_DEFAULT; |
| |
| return 0; |
| } |
| |
| static int mt9m001_s_fmt(struct v4l2_subdev *sd, |
| const struct mt9m001_datafmt *fmt, |
| struct v4l2_mbus_framefmt *mf) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| struct v4l2_subdev_selection sel = { |
| .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| .target = V4L2_SEL_TGT_CROP, |
| .r.left = mt9m001->rect.left, |
| .r.top = mt9m001->rect.top, |
| .r.width = mf->width, |
| .r.height = mf->height, |
| }; |
| int ret; |
| |
| /* No support for scaling so far, just crop. TODO: use skipping */ |
| ret = mt9m001_set_selection(sd, NULL, &sel); |
| if (!ret) { |
| mf->width = mt9m001->rect.width; |
| mf->height = mt9m001->rect.height; |
| mt9m001->fmt = fmt; |
| mf->colorspace = fmt->colorspace; |
| } |
| |
| return ret; |
| } |
| |
| static int mt9m001_set_fmt(struct v4l2_subdev *sd, |
| struct v4l2_subdev_state *sd_state, |
| struct v4l2_subdev_format *format) |
| { |
| struct v4l2_mbus_framefmt *mf = &format->format; |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| const struct mt9m001_datafmt *fmt; |
| |
| if (format->pad) |
| return -EINVAL; |
| |
| v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH, |
| MT9M001_MAX_WIDTH, 1, |
| &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top, |
| MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0); |
| |
| if (mt9m001->fmts == mt9m001_colour_fmts) |
| mf->height = ALIGN(mf->height - 1, 2); |
| |
| fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts, |
| mt9m001->num_fmts); |
| if (!fmt) { |
| fmt = mt9m001->fmt; |
| mf->code = fmt->code; |
| } |
| |
| mf->colorspace = fmt->colorspace; |
| mf->field = V4L2_FIELD_NONE; |
| mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; |
| mf->quantization = V4L2_QUANTIZATION_DEFAULT; |
| mf->xfer_func = V4L2_XFER_FUNC_DEFAULT; |
| |
| if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) |
| return mt9m001_s_fmt(sd, fmt, mf); |
| sd_state->pads->try_fmt = *mf; |
| return 0; |
| } |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| static int mt9m001_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 = 2; |
| reg->val = reg_read(client, reg->reg); |
| |
| if (reg->val > 0xffff) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static int mt9m001_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 mt9m001_power_on(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| int ret; |
| |
| ret = clk_prepare_enable(mt9m001->clk); |
| if (ret) |
| return ret; |
| |
| if (mt9m001->standby_gpio) { |
| gpiod_set_value_cansleep(mt9m001->standby_gpio, 0); |
| usleep_range(1000, 2000); |
| } |
| |
| if (mt9m001->reset_gpio) { |
| gpiod_set_value_cansleep(mt9m001->reset_gpio, 1); |
| usleep_range(1000, 2000); |
| gpiod_set_value_cansleep(mt9m001->reset_gpio, 0); |
| usleep_range(1000, 2000); |
| } |
| |
| return 0; |
| } |
| |
| static int mt9m001_power_off(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| |
| gpiod_set_value_cansleep(mt9m001->standby_gpio, 1); |
| clk_disable_unprepare(mt9m001->clk); |
| |
| return 0; |
| } |
| |
| static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct mt9m001 *mt9m001 = container_of(ctrl->handler, |
| struct mt9m001, hdl); |
| s32 min, max; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_EXPOSURE_AUTO: |
| min = mt9m001->exposure->minimum; |
| max = mt9m001->exposure->maximum; |
| mt9m001->exposure->val = |
| (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min; |
| break; |
| } |
| return 0; |
| } |
| |
| static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct mt9m001 *mt9m001 = container_of(ctrl->handler, |
| struct mt9m001, hdl); |
| struct v4l2_subdev *sd = &mt9m001->subdev; |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct v4l2_ctrl *exp = mt9m001->exposure; |
| int data; |
| int ret; |
| |
| if (!pm_runtime_get_if_in_use(&client->dev)) |
| return 0; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_VFLIP: |
| if (ctrl->val) |
| ret = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
| else |
| ret = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
| break; |
| |
| 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); |
| ret = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
| } else { |
| /* Pack it into 1.125..15 variable step, register values 9..67 */ |
| /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
| unsigned long range = ctrl->maximum - ctrl->default_value - 1; |
| unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) * |
| 111 + range / 2) / range + 9; |
| |
| if (gain <= 32) |
| data = gain; |
| else if (gain <= 64) |
| data = ((gain - 32) * 16 + 16) / 32 + 80; |
| else |
| data = ((gain - 64) * 7 + 28) / 56 + 96; |
| |
| dev_dbg(&client->dev, "Setting gain from %d to %d\n", |
| reg_read(client, MT9M001_GLOBAL_GAIN), data); |
| ret = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
| } |
| break; |
| |
| case V4L2_CID_EXPOSURE_AUTO: |
| if (ctrl->val == V4L2_EXPOSURE_MANUAL) { |
| unsigned long range = exp->maximum - exp->minimum; |
| unsigned long shutter = ((exp->val - (s32)exp->minimum) * 1048 + |
| range / 2) / range + 1; |
| |
| dev_dbg(&client->dev, |
| "Setting shutter width from %d to %lu\n", |
| reg_read(client, MT9M001_SHUTTER_WIDTH), shutter); |
| ret = reg_write(client, MT9M001_SHUTTER_WIDTH, shutter); |
| } else { |
| mt9m001->total_h = mt9m001->rect.height + |
| mt9m001->y_skip_top + MT9M001_DEFAULT_VBLANK; |
| ret = reg_write(client, MT9M001_SHUTTER_WIDTH, |
| mt9m001->total_h); |
| } |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| pm_runtime_put(&client->dev); |
| |
| return ret; |
| } |
| |
| /* |
| * 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 mt9m001_video_probe(struct i2c_client *client) |
| { |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| s32 data; |
| int ret; |
| |
| /* Enable the chip */ |
| data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
| dev_dbg(&client->dev, "write: %d\n", data); |
| |
| /* Read out the chip version register */ |
| data = reg_read(client, MT9M001_CHIP_VERSION); |
| |
| /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ |
| switch (data) { |
| case 0x8411: |
| case 0x8421: |
| mt9m001->fmts = mt9m001_colour_fmts; |
| mt9m001->num_fmts = ARRAY_SIZE(mt9m001_colour_fmts); |
| break; |
| case 0x8431: |
| mt9m001->fmts = mt9m001_monochrome_fmts; |
| mt9m001->num_fmts = ARRAY_SIZE(mt9m001_monochrome_fmts); |
| break; |
| default: |
| dev_err(&client->dev, |
| "No MT9M001 chip detected, register read %x\n", data); |
| ret = -ENODEV; |
| goto done; |
| } |
| |
| mt9m001->fmt = &mt9m001->fmts[0]; |
| |
| dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
| data == 0x8431 ? "C12STM" : "C12ST"); |
| |
| ret = mt9m001_init(client); |
| if (ret < 0) { |
| dev_err(&client->dev, "Failed to initialise the camera\n"); |
| goto done; |
| } |
| |
| /* mt9m001_init() has reset the chip, returning registers to defaults */ |
| ret = v4l2_ctrl_handler_setup(&mt9m001->hdl); |
| |
| done: |
| return ret; |
| } |
| |
| static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| |
| *lines = mt9m001->y_skip_top; |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = { |
| .g_volatile_ctrl = mt9m001_g_volatile_ctrl, |
| .s_ctrl = mt9m001_s_ctrl, |
| }; |
| |
| static const struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { |
| .log_status = v4l2_ctrl_subdev_log_status, |
| .subscribe_event = v4l2_ctrl_subdev_subscribe_event, |
| .unsubscribe_event = v4l2_event_subdev_unsubscribe, |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| .g_register = mt9m001_g_register, |
| .s_register = mt9m001_s_register, |
| #endif |
| }; |
| |
| static int mt9m001_init_cfg(struct v4l2_subdev *sd, |
| struct v4l2_subdev_state *sd_state) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| struct v4l2_mbus_framefmt *try_fmt = |
| v4l2_subdev_get_try_format(sd, sd_state, 0); |
| |
| try_fmt->width = MT9M001_MAX_WIDTH; |
| try_fmt->height = MT9M001_MAX_HEIGHT; |
| try_fmt->code = mt9m001->fmts[0].code; |
| try_fmt->colorspace = mt9m001->fmts[0].colorspace; |
| try_fmt->field = V4L2_FIELD_NONE; |
| try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; |
| try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT; |
| try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT; |
| |
| return 0; |
| } |
| |
| static int mt9m001_enum_mbus_code(struct v4l2_subdev *sd, |
| struct v4l2_subdev_state *sd_state, |
| struct v4l2_subdev_mbus_code_enum *code) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| |
| if (code->pad || code->index >= mt9m001->num_fmts) |
| return -EINVAL; |
| |
| code->code = mt9m001->fmts[code->index].code; |
| return 0; |
| } |
| |
| static int mt9m001_get_mbus_config(struct v4l2_subdev *sd, |
| unsigned int pad, |
| struct v4l2_mbus_config *cfg) |
| { |
| /* MT9M001 has all capture_format parameters fixed */ |
| cfg->type = V4L2_MBUS_PARALLEL; |
| cfg->bus.parallel.flags = V4L2_MBUS_PCLK_SAMPLE_FALLING | |
| V4L2_MBUS_HSYNC_ACTIVE_HIGH | |
| V4L2_MBUS_VSYNC_ACTIVE_HIGH | |
| V4L2_MBUS_DATA_ACTIVE_HIGH | |
| V4L2_MBUS_MASTER; |
| |
| return 0; |
| } |
| |
| static const struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { |
| .s_stream = mt9m001_s_stream, |
| }; |
| |
| static const struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = { |
| .g_skip_top_lines = mt9m001_g_skip_top_lines, |
| }; |
| |
| static const struct v4l2_subdev_pad_ops mt9m001_subdev_pad_ops = { |
| .init_cfg = mt9m001_init_cfg, |
| .enum_mbus_code = mt9m001_enum_mbus_code, |
| .get_selection = mt9m001_get_selection, |
| .set_selection = mt9m001_set_selection, |
| .get_fmt = mt9m001_get_fmt, |
| .set_fmt = mt9m001_set_fmt, |
| .get_mbus_config = mt9m001_get_mbus_config, |
| }; |
| |
| static const struct v4l2_subdev_ops mt9m001_subdev_ops = { |
| .core = &mt9m001_subdev_core_ops, |
| .video = &mt9m001_subdev_video_ops, |
| .sensor = &mt9m001_subdev_sensor_ops, |
| .pad = &mt9m001_subdev_pad_ops, |
| }; |
| |
| static int mt9m001_probe(struct i2c_client *client) |
| { |
| struct mt9m001 *mt9m001; |
| struct i2c_adapter *adapter = client->adapter; |
| int ret; |
| |
| 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; |
| } |
| |
| mt9m001 = devm_kzalloc(&client->dev, sizeof(*mt9m001), GFP_KERNEL); |
| if (!mt9m001) |
| return -ENOMEM; |
| |
| mt9m001->clk = devm_clk_get(&client->dev, NULL); |
| if (IS_ERR(mt9m001->clk)) |
| return PTR_ERR(mt9m001->clk); |
| |
| mt9m001->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby", |
| GPIOD_OUT_LOW); |
| if (IS_ERR(mt9m001->standby_gpio)) |
| return PTR_ERR(mt9m001->standby_gpio); |
| |
| mt9m001->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", |
| GPIOD_OUT_LOW); |
| if (IS_ERR(mt9m001->reset_gpio)) |
| return PTR_ERR(mt9m001->reset_gpio); |
| |
| v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); |
| mt9m001->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | |
| V4L2_SUBDEV_FL_HAS_EVENTS; |
| v4l2_ctrl_handler_init(&mt9m001->hdl, 4); |
| v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, |
| V4L2_CID_VFLIP, 0, 1, 1, 0); |
| v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, |
| V4L2_CID_GAIN, 0, 127, 1, 64); |
| mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, |
| V4L2_CID_EXPOSURE, 1, 255, 1, 255); |
| /* |
| * Simulated autoexposure. If enabled, we calculate shutter width |
| * ourselves in the driver based on vertical blanking and frame width |
| */ |
| mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl, |
| &mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, |
| V4L2_EXPOSURE_AUTO); |
| mt9m001->subdev.ctrl_handler = &mt9m001->hdl; |
| if (mt9m001->hdl.error) |
| return mt9m001->hdl.error; |
| |
| v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure, |
| V4L2_EXPOSURE_MANUAL, true); |
| |
| mutex_init(&mt9m001->mutex); |
| mt9m001->hdl.lock = &mt9m001->mutex; |
| |
| /* Second stage probe - when a capture adapter is there */ |
| mt9m001->y_skip_top = 0; |
| mt9m001->rect.left = MT9M001_COLUMN_SKIP; |
| mt9m001->rect.top = MT9M001_ROW_SKIP; |
| mt9m001->rect.width = MT9M001_MAX_WIDTH; |
| mt9m001->rect.height = MT9M001_MAX_HEIGHT; |
| |
| ret = mt9m001_power_on(&client->dev); |
| if (ret) |
| goto error_hdl_free; |
| |
| pm_runtime_set_active(&client->dev); |
| pm_runtime_enable(&client->dev); |
| |
| ret = mt9m001_video_probe(client); |
| if (ret) |
| goto error_power_off; |
| |
| mt9m001->pad.flags = MEDIA_PAD_FL_SOURCE; |
| mt9m001->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; |
| ret = media_entity_pads_init(&mt9m001->subdev.entity, 1, &mt9m001->pad); |
| if (ret) |
| goto error_power_off; |
| |
| ret = v4l2_async_register_subdev(&mt9m001->subdev); |
| if (ret) |
| goto error_entity_cleanup; |
| |
| pm_runtime_idle(&client->dev); |
| |
| return 0; |
| |
| error_entity_cleanup: |
| media_entity_cleanup(&mt9m001->subdev.entity); |
| error_power_off: |
| pm_runtime_disable(&client->dev); |
| pm_runtime_set_suspended(&client->dev); |
| mt9m001_power_off(&client->dev); |
| |
| error_hdl_free: |
| v4l2_ctrl_handler_free(&mt9m001->hdl); |
| mutex_destroy(&mt9m001->mutex); |
| |
| return ret; |
| } |
| |
| static int mt9m001_remove(struct i2c_client *client) |
| { |
| struct mt9m001 *mt9m001 = to_mt9m001(client); |
| |
| /* |
| * As it increments RPM usage_count even on errors, we don't need to |
| * check the returned code here. |
| */ |
| pm_runtime_get_sync(&client->dev); |
| |
| v4l2_async_unregister_subdev(&mt9m001->subdev); |
| media_entity_cleanup(&mt9m001->subdev.entity); |
| |
| pm_runtime_disable(&client->dev); |
| pm_runtime_set_suspended(&client->dev); |
| pm_runtime_put_noidle(&client->dev); |
| mt9m001_power_off(&client->dev); |
| |
| v4l2_ctrl_handler_free(&mt9m001->hdl); |
| mutex_destroy(&mt9m001->mutex); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id mt9m001_id[] = { |
| { "mt9m001", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, mt9m001_id); |
| |
| static const struct dev_pm_ops mt9m001_pm_ops = { |
| SET_RUNTIME_PM_OPS(mt9m001_power_off, mt9m001_power_on, NULL) |
| }; |
| |
| static const struct of_device_id mt9m001_of_match[] = { |
| { .compatible = "onnn,mt9m001", }, |
| { /* sentinel */ }, |
| }; |
| MODULE_DEVICE_TABLE(of, mt9m001_of_match); |
| |
| static struct i2c_driver mt9m001_i2c_driver = { |
| .driver = { |
| .name = "mt9m001", |
| .pm = &mt9m001_pm_ops, |
| .of_match_table = mt9m001_of_match, |
| }, |
| .probe_new = mt9m001_probe, |
| .remove = mt9m001_remove, |
| .id_table = mt9m001_id, |
| }; |
| |
| module_i2c_driver(mt9m001_i2c_driver); |
| |
| MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); |
| MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); |
| MODULE_LICENSE("GPL v2"); |