Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/media/i2c/mt9m001.c b/drivers/media/i2c/mt9m001.c
new file mode 100644
index 0000000..5613072
--- /dev/null
+++ b/drivers/media/i2c/mt9m001.c
@@ -0,0 +1,883 @@
+// 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)
+{
+ 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_get_sync(&client->dev);
+ if (ret < 0)
+ goto put_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);
+ mutex_unlock(&mt9m001->mutex);
+
+ return ret;
+}
+
+static int mt9m001_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 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_pad_config *cfg,
+ 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_pad_config *cfg,
+ 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, cfg, 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_pad_config *cfg,
+ 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);
+ cfg->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_pad_config *cfg)
+{
+ 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, cfg, 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_pad_config *cfg,
+ 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_g_mbus_config(struct v4l2_subdev *sd,
+ struct v4l2_mbus_config *cfg)
+{
+ /* MT9M001 has all capture_format parameters fixed */
+ cfg->flags = V4L2_MBUS_PCLK_SAMPLE_FALLING |
+ V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_MASTER;
+ cfg->type = V4L2_MBUS_PARALLEL;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
+ .s_stream = mt9m001_s_stream,
+ .g_mbus_config = mt9m001_g_mbus_config,
+};
+
+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,
+};
+
+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);
+
+ 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");