[RFC,V2,2/2] media: i2c: Add Omnivision OV02A10 camera sensor driver

dongchun.zhu
2019-07-04T08:46:51Z

From: Dongchun Zhu <dongchun.zhu@mediatek.com>

This patch adds a V4L2 sub-device driver for OV02A10 image sensor.
The OV02A10 is a 1/5" CMOS sensor from Omnivision.
Supports output format: 10-bit Raw.
The OV02A10 has a single MIPI lane interface and use the I2C bus for control and the CSI-2 bus for data.

Signed-off-by: Dongchun Zhu <dongchun.zhu@mediatek.com>
---
MAINTAINERS | 1 +
drivers/media/i2c/Kconfig | 12 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ov02a10.c | 1017 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1031 insertions(+)
create mode 100644 drivers/media/i2c/ov02a10.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 62b81ff..863aaab 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11576,6 +11576,7 @@ M: Dongchun Zhu <dongchun.zhu@mediatek.com>
L: linux-media@vger.kernel.org
T: git git://linuxtv.org/media_tree.git
S: Maintained
+F: drivers/media/i2c/ov02a10.c
F: Documentation/devicetree/bindings/media/i2c/ov02a10.txt

OMNIVISION OV2680 SENSOR DRIVER
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 7793358..480aa42 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -615,6 +615,18 @@ config VIDEO_IMX355
To compile this driver as a module, choose M here: the
module will be called imx355.

+config VIDEO_OV02A10
+ tristate "OmniVision OV02A10 sensor support"
+ depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ depends on MEDIA_CAMERA_SUPPORT
+ select V4L2_FWNODE
+ help
+ This is a Video4Linux2 sensor driver for the OmniVision
+ OV02A10 camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ov02a10.
+
config VIDEO_OV2640
tristate "OmniVision OV2640 sensor support"
depends on VIDEO_V4L2 && I2C
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index d8ad9da..4b8f67b 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_VIDEO_VP27SMPX) += vp27smpx.o
obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o
obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o
obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
+obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o
obj-$(CONFIG_VIDEO_OV2640) += ov2640.o
obj-$(CONFIG_VIDEO_OV2680) += ov2680.o
obj-$(CONFIG_VIDEO_OV2685) += ov2685.o
diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c
new file mode 100644
index 0000000..afd6063
--- /dev/null
+++ b/drivers/media/i2c/ov02a10.c
@@ -0,0 +1,1017 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+#define CHIP_ID 0x2509
+#define OV02A10_REG_CHIP_ID_H 0x02
+#define OV02A10_REG_CHIP_ID_L 0x03
+#define OV02A10_ID(_msb, _lsb) ((_msb) << 8 | (_lsb))
+
+/* bit[1] vertical upside down */
+/* bit[0] horizontal mirror */
+#define REG_MIRROR_FLIP_CONTROL 0x3f
+
+/* Orientation */
+#define REG_CONFIG_MIRROR_FLIP 0x03
+
+#define REG_PAGE_SWITCH 0xfd
+#define REG_GLOBAL_EFFECTIVE 0x01
+#define REG_ENABLE BIT(0)
+
+#define REG_SC_CTRL_MODE 0xac
+#define SC_CTRL_MODE_STANDBY 0x00
+#define SC_CTRL_MODE_STREAMING 0x01
+
+#define OV02A10_REG_EXPOSURE_H 0x03
+#define OV02A10_REG_EXPOSURE_L 0x04
+#define OV02A10_EXPOSURE_MIN 4
+#define OV02A10_EXPOSURE_STEP 1
+
+#define OV02A10_REG_VTS_H 0x05
+#define OV02A10_REG_VTS_L 0x06
+#define OV02A10_VTS_MAX 0x209f
+#define OV02A10_VTS_MIN 0x04cf
+
+#define OV02A10_REG_GAIN 0x24
+#define OV02A10_GAIN_MIN 0x10
+#define OV02A10_GAIN_MAX 0xf8
+#define OV02A10_GAIN_STEP 0x01
+#define OV02A10_GAIN_DEFAULT 0x40
+
+#define REG_NULL 0xff
+
+#define OV02A10_LANES 1
+#define OV02A10_BITS_PER_SAMPLE 10
+
+static const char * const ov02a10_supply_names[] = {
+ "dovdd", /* Digital I/O power */
+ "avdd", /* Analog power */
+ "dvdd", /* Digital core power */
+};
+
+#define OV02A10_NUM_SUPPLIES ARRAY_SIZE(ov02a10_supply_names)
+
+struct regval {
+ u16 addr;
+ u8 val;
+};
+
+struct ov02a10_mode {
+ u32 width;
+ u32 height;
+ u32 exp_def;
+ u32 hts_def;
+ u32 vts_def;
+ const struct regval *reg_list;
+};
+
+struct ov02a10 {
+ struct clk *xvclk;
+ struct gpio_desc *pwdn_gpio;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES];
+
+ bool streaming;
+ bool upside_down;
+
+ /*
+ * Serialize control access, get/set format, get selection
+ * and start streaming.
+ */
+ struct mutex mutex;
+ struct v4l2_subdev subdev;
+ struct media_pad pad;
+ struct v4l2_ctrl *anal_gain;
+ struct v4l2_ctrl *exposure;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *test_pattern;
+ struct v4l2_mbus_framefmt fmt;
+ struct v4l2_ctrl_handler ctrl_handler;
+
+ const struct ov02a10_mode *cur_mode;
+};
+
+#define to_ov02a10(sd) container_of(sd, struct ov02a10, subdev)
+
+static inline void msleep_range(unsigned int delay_base)
+{
+ usleep_range(delay_base * 1000, delay_base * 1000 + 500);
+}
+
+/* MIPI color bar enable output */
+static const struct regval ov02a10_test_pattern_enable_regs[] = {
+ {0xfd, 0x01},
+ {0x0d, 0x00},
+ {0xb6, 0x01},
+ {0x01, 0x01},
+ {0xfd, 0x01},
+ {0xac, 0x01},
+ {REG_NULL, 0x00}
+};
+
+/* MIPI color bar disable output */
+static const struct regval ov02a10_test_pattern_disable_regs[] = {
+ {0xfd, 0x01},
+ {0x0d, 0x00},
+ {0xb6, 0x00},
+ {0x01, 0x01},
+ {0xfd, 0x01},
+ {0xac, 0x01},
+ {REG_NULL, 0x00}
+};
+
+/*
+ * Xclk 24Mhz
+ * Pclk 39Mhz
+ * linelength 934(0x3a6)
+ * framelength 1390(0x56E)
+ * grabwindow_width 1600
+ * grabwindow_height 1200
+ * max_framerate 30fps
+ * mipi_datarate per lane 780Mbps
+ */
+static const struct regval ov02a10_1600x1200_regs[] = {
+ {0xfd, 0x01},
+ {0xac, 0x00},
+ {0xfd, 0x00},
+ {0x2f, 0x29},
+ {0x34, 0x00},
+ {0x35, 0x21},
+ {0x30, 0x15},
+ {0x33, 0x01},
+ {0xfd, 0x01},
+ {0x44, 0x00},
+ {0x2a, 0x4c},
+ {0x2b, 0x1e},
+ {0x2c, 0x60},
+ {0x25, 0x11},
+ {0x03, 0x01},
+ {0x04, 0xae},
+ {0x09, 0x00},
+ {0x0a, 0x02},
+ {0x06, 0xa6},
+ {0x31, 0x00},
+ {0x24, 0x40},
+ {0x01, 0x01},
+ {0xfb, 0x73},
+ {0xfd, 0x01},
+ {0x16, 0x04},
+ {0x1c, 0x09},
+ {0x21, 0x42},
+ {0x12, 0x04},
+ {0x13, 0x10},
+ {0x11, 0x40},
+ {0x33, 0x81},
+ {0xd0, 0x00},
+ {0xd1, 0x01},
+ {0xd2, 0x00},
+ {0x50, 0x10},
+ {0x51, 0x23},
+ {0x52, 0x20},
+ {0x53, 0x10},
+ {0x54, 0x02},
+ {0x55, 0x20},
+ {0x56, 0x02},
+ {0x58, 0x48},
+ {0x5d, 0x15},
+ {0x5e, 0x05},
+ {0x66, 0x66},
+ {0x68, 0x68},
+ {0x6b, 0x00},
+ {0x6c, 0x00},
+ {0x6f, 0x40},
+ {0x70, 0x40},
+ {0x71, 0x0a},
+ {0x72, 0xf0},
+ {0x73, 0x10},
+ {0x75, 0x80},
+ {0x76, 0x10},
+ {0x84, 0x00},
+ {0x85, 0x10},
+ {0x86, 0x10},
+ {0x87, 0x00},
+ {0x8a, 0x22},
+ {0x8b, 0x22},
+ {0x19, 0xf1},
+ {0x29, 0x01},
+ {0xfd, 0x01},
+ {0x9d, 0xd6},
+ {0xa0, 0x29},
+ {0xa1, 0x03},
+ {0xad, 0x62},
+ {0xae, 0x00},
+ {0xaf, 0x85},
+ {0xb1, 0x01},
+ {0x8e, 0x06},
+ {0x8f, 0x40},
+ {0x90, 0x04},
+ {0x91, 0xb0},
+ {0x45, 0x01},
+ {0x46, 0x00},
+ {0x47, 0x6c},
+ {0x48, 0x03},
+ {0x49, 0x8b},
+ {0x4a, 0x00},
+ {0x4b, 0x07},
+ {0x4c, 0x04},
+ {0x4d, 0xb7},
+ {0xf0, 0x40},
+ {0xf1, 0x40},
+ {0xf2, 0x40},
+ {0xf3, 0x40},
+ {0x3f, 0x00},
+ {0xfd, 0x01},
+ {0x05, 0x00},
+ {0x06, 0xa6},
+ {0xfd, 0x01},
+ {REG_NULL, 0x00}
+};
+
+#define OV02A10_LINK_FREQ_390MHZ 390000000
+static const s64 link_freq_menu_items[] = {
+ OV02A10_LINK_FREQ_390MHZ
+};
+
+static const char * const ov02a10_test_pattern_menu[] = {
+ "Disabled",
+ "Color Bar",
+};
+
+static const struct ov02a10_mode supported_modes[] = {
+ {
+ .width = 1600,
+ .height = 1200,
+ .exp_def = 0x01ae,
+ .hts_def = 0x03a6,
+ .vts_def = 0x056e,
+ .reg_list = ov02a10_1600x1200_regs,
+ },
+};
+
+/* write a register */
+static int ov02a10_write_reg(struct ov02a10 *ov02a10, u8 addr, u8 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ u8 buf[2] = {addr, val};
+ int ret;
+
+ ret = i2c_master_send(client, buf, 2);
+
+ if (ret != 2) {
+ dev_err(&client->dev, "%s: error: reg=%x, val=%x\n",
+ __func__, addr, val);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int ov02a10_write_array(struct ov02a10 *ov02a10,
+ const struct regval *regs)
+{
+ u32 i;
+ int ret;
+
+ for (i = 0; regs[i].addr != REG_NULL; i++) {
+ ret = ov02a10_write_reg(ov02a10, regs[i].addr, regs[i].val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* read a register */
+static int ov02a10_read_reg(struct ov02a10 *ov02a10, u8 reg, u8 *val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ u8 data = reg;
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = &data,
+ };
+ int ret;
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ goto err_wr;
+
+ msg.flags = I2C_M_RD;
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ goto err_rd;
+
+ *val = data;
+ return 0;
+
+err_rd:
+ dev_err(&client->dev, "i2c_transfer --I2C_M_RD failed\n");
+err_wr:
+ dev_err(&client->dev, "read error: reg=0x%02x: %d\n", reg, ret);
+ return ret;
+}
+
+static void ov02a10_fill_fmt(const struct ov02a10_mode *mode,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ fmt->width = mode->width;
+ fmt->height = mode->height;
+ fmt->field = V4L2_FIELD_NONE;
+}
+
+static int ov02a10_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
+ int ret = 0;
+
+ mutex_lock(&ov02a10->mutex);
+
+ if (ov02a10->streaming) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ /* only one mode supported */
+ mbus_fmt->code = ov02a10->fmt.code;
+ ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt);
+ ov02a10->fmt = fmt->format;
+
+unlock:
+ mutex_unlock(&ov02a10->mutex);
+
+ return ret;
+}
+
+static int ov02a10_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
+
+ mutex_lock(&ov02a10->mutex);
+
+ fmt->format = ov02a10->fmt;
+ mbus_fmt->code = ov02a10->fmt.code;
+ ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt);
+
+ mutex_unlock(&ov02a10->mutex);
+
+ return 0;
+}
+
+static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+
+ if (code->index >= ARRAY_SIZE(supported_modes) || !(code->index))
+ return -EINVAL;
+
+ code->code = ov02a10->fmt.code;
+
+ return 0;
+}
+
+static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ if (fse->index >= ARRAY_SIZE(supported_modes) || !(fse->index))
+ return -EINVAL;
+
+ fse->min_width = supported_modes[fse->index].width;
+ fse->max_width = supported_modes[fse->index].width;
+ fse->max_height = supported_modes[fse->index].height;
+ fse->min_height = supported_modes[fse->index].height;
+
+ return 0;
+}
+
+static int __ov02a10_power_on(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ struct device *dev = &client->dev;
+ int ret;
+
+ ret = clk_prepare_enable(ov02a10->xvclk);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable xvclk\n");
+ return ret;
+ }
+
+ /* note: set 0 is high, set 1 is low */
+ gpiod_set_value_cansleep(ov02a10->reset_gpio, 1);
+ gpiod_set_value_cansleep(ov02a10->pwdn_gpio, 0);
+
+ ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable regulators\n");
+ goto disable_clk;
+ }
+ msleep_range(7);
+
+ gpiod_set_value_cansleep(ov02a10->pwdn_gpio, 1);
+ msleep_range(10);
+
+ gpiod_set_value_cansleep(ov02a10->reset_gpio, 0);
+ msleep_range(10);
+
+ return 0;
+
+disable_clk:
+ clk_disable_unprepare(ov02a10->xvclk);
+
+ return ret;
+}
+
+static void __ov02a10_power_off(struct ov02a10 *ov02a10)
+{
+ clk_disable_unprepare(ov02a10->xvclk);
+ gpiod_set_value_cansleep(ov02a10->reset_gpio, 1);
+ gpiod_set_value_cansleep(ov02a10->pwdn_gpio, 1);
+ regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies);
+}
+
+static int __ov02a10_start_stream(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ int ret;
+
+ /* Apply default values of current mode */
+ ret = ov02a10_write_array(ov02a10, ov02a10->cur_mode->reg_list);
+ if (ret)
+ return ret;
+
+ /* Apply customized values from user */
+ ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler);
+ if (ret)
+ return ret;
+
+ /* Set Orientation be 180 degree */
+ if (ov02a10->upside_down) {
+ ret = ov02a10_write_reg(ov02a10, REG_MIRROR_FLIP_CONTROL,
+ REG_CONFIG_MIRROR_FLIP);
+ if (ret) {
+ dev_err(&client->dev, "%s failed to set orientation\n",
+ __func__);
+ return ret;
+ }
+ ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* set stream on register */
+ return ov02a10_write_reg(ov02a10,
+ REG_SC_CTRL_MODE, SC_CTRL_MODE_STREAMING);
+}
+
+static int __ov02a10_stop_stream(struct ov02a10 *ov02a10)
+{
+ return ov02a10_write_reg(ov02a10,
+ REG_SC_CTRL_MODE, SC_CTRL_MODE_STANDBY);
+}
+
+static int ov02a10_entity_init_cfg(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg)
+{
+ struct v4l2_subdev_format fmt = { 0 };
+
+ fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+ fmt.format.width = 1600;
+ fmt.format.height = 1200;
+
+ ov02a10_set_fmt(subdev, cfg, &fmt);
+
+ return 0;
+}
+
+static int ov02a10_s_stream(struct v4l2_subdev *sd, int on)
+{
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ int ret = 0;
+
+ dev_dbg(&client->dev, "ov02a10 s_stream (%d)\n", on);
+ mutex_lock(&ov02a10->mutex);
+
+ if (ov02a10->streaming == on)
+ goto unlock_and_return;
+
+ if (on) {
+ ret = pm_runtime_get_sync(&client->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&client->dev);
+ goto unlock_and_return;
+ }
+
+ ret = __ov02a10_start_stream(ov02a10);
+ if (ret) {
+ __ov02a10_stop_stream(ov02a10);
+ ov02a10->streaming = !on;
+ goto err_rpm_put;
+ }
+ } else {
+ __ov02a10_stop_stream(ov02a10);
+ pm_runtime_put(&client->dev);
+ }
+
+ ov02a10->streaming = on;
+ mutex_unlock(&ov02a10->mutex);
+
+ return ret;
+
+err_rpm_put:
+ pm_runtime_put(&client->dev);
+unlock_and_return:
+ mutex_unlock(&ov02a10->mutex);
+
+ return ret;
+}
+
+static int ov02a10_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+ struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd,
+ fh->pad,
+ 0);
+
+ mutex_lock(&ov02a10->mutex);
+ /* Initialize try_fmt */
+ try_fmt->code = ov02a10->fmt.code;
+ ov02a10_fill_fmt(&supported_modes[0], try_fmt);
+
+ mutex_unlock(&ov02a10->mutex);
+
+ return 0;
+}
+
+static int __maybe_unused ov02a10_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+
+ return __ov02a10_power_on(ov02a10);
+}
+
+static int __maybe_unused ov02a10_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+
+ __ov02a10_power_off(ov02a10);
+
+ return 0;
+}
+
+static const struct dev_pm_ops ov02a10_pm_ops = {
+ SET_RUNTIME_PM_OPS(ov02a10_runtime_suspend,
+ ov02a10_runtime_resume, NULL)
+};
+
+static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, s32 value)
+{
+ if (value)
+ return ov02a10_write_array(ov02a10,
+ ov02a10_test_pattern_enable_regs);
+
+ return ov02a10_write_array(ov02a10,
+ ov02a10_test_pattern_disable_regs);
+}
+
+static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct ov02a10 *ov02a10 = container_of(ctrl->handler,
+ struct ov02a10, ctrl_handler);
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ s64 max_expo;
+ int ret;
+
+ /* Propagate change of current control to all related controls */
+ if (ctrl->id == V4L2_CID_VBLANK) {
+ /* Update max exposure while meeting expected vblanking */
+ max_expo = ov02a10->cur_mode->height + ctrl->val - 4;
+ __v4l2_ctrl_modify_range(ov02a10->exposure,
+ ov02a10->exposure->minimum, max_expo,
+ ov02a10->exposure->step,
+ ov02a10->exposure->default_value);
+ }
+
+ /* V4L2 controls values will be applied only when power is already up */
+ if (!pm_runtime_get_if_in_use(&client->dev))
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_H,
+ ((ctrl->val >> 8) & 0xFF));
+ if (!ret) {
+ ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_L,
+ (ctrl->val & 0xFF));
+ if (ret < 0)
+ return ret;
+ }
+ ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ ret = ov02a10_write_reg(ov02a10, OV02A10_REG_GAIN,
+ (ctrl->val & 0xFF));
+ if (ret < 0)
+ return ret;
+ ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ break;
+ case V4L2_CID_VBLANK:
+ ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_H,
+ (((ctrl->val +
+ ov02a10->cur_mode->height - 1224) >> 8)
+ & 0xFF));
+ if (!ret) {
+ ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_L,
+ ((ctrl->val +
+ ov02a10->cur_mode->height -
+ 1224) & 0xFF));
+ if (ret < 0)
+ return ret;
+ }
+ ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ ret = ov02a10_set_test_pattern(ov02a10, ctrl->val);
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
+ __func__, ctrl->id, ctrl->val);
+ ret = -EINVAL;
+ break;
+ };
+
+ pm_runtime_put(&client->dev);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_video_ops ov02a10_video_ops = {
+ .s_stream = ov02a10_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = {
+ .init_cfg = ov02a10_entity_init_cfg,
+ .enum_mbus_code = ov02a10_enum_mbus_code,
+ .enum_frame_size = ov02a10_enum_frame_sizes,
+ .get_fmt = ov02a10_get_fmt,
+ .set_fmt = ov02a10_set_fmt,
+};
+
+static const struct v4l2_subdev_ops ov02a10_subdev_ops = {
+ .video = &ov02a10_video_ops,
+ .pad = &ov02a10_pad_ops,
+};
+
+static const struct media_entity_operations ov02a10_subdev_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct v4l2_subdev_internal_ops ov02a10_internal_ops = {
+ .open = ov02a10_open,
+};
+
+static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = {
+ .s_ctrl = ov02a10_set_ctrl,
+};
+
+static int ov02a10_initialize_controls(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ const struct ov02a10_mode *mode;
+ struct v4l2_ctrl_handler *handler;
+ struct v4l2_ctrl *ctrl;
+ u64 exposure_max;
+ u32 pixel_rate, h_blank;
+ int ret;
+
+ handler = &ov02a10->ctrl_handler;
+ mode = ov02a10->cur_mode;
+ ret = v4l2_ctrl_handler_init(handler, 10);
+ if (ret)
+ return ret;
+ handler->lock = &ov02a10->mutex;
+
+ ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
+ 0, 0, link_freq_menu_items);
+ if (ctrl)
+ ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ pixel_rate = (link_freq_menu_items[0] * 2 * OV02A10_LANES) /
+ OV02A10_BITS_PER_SAMPLE;
+ v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
+ 0, pixel_rate, 1, pixel_rate);
+
+ h_blank = mode->hts_def - mode->width;
+ ov02a10->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
+ h_blank, h_blank, 1, h_blank);
+ if (ov02a10->hblank)
+ ov02a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ ov02a10->vblank = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops,
+ V4L2_CID_VBLANK, mode->vts_def -
+ mode->height,
+ OV02A10_VTS_MAX - mode->height, 1,
+ mode->vts_def - mode->height);
+
+ exposure_max = mode->vts_def - 4;
+ ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops,
+ V4L2_CID_EXPOSURE,
+ OV02A10_EXPOSURE_MIN,
+ exposure_max,
+ OV02A10_EXPOSURE_STEP,
+ mode->exp_def);
+
+ ov02a10->anal_gain = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops,
+ V4L2_CID_ANALOGUE_GAIN,
+ OV02A10_GAIN_MIN,
+ OV02A10_GAIN_MAX,
+ OV02A10_GAIN_STEP,
+ OV02A10_GAIN_DEFAULT);
+
+ ov02a10->test_pattern =
+ v4l2_ctrl_new_std_menu_items(handler,
+ &ov02a10_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(ov02a10_test_pattern_menu) -
+ 1, 0, 0, ov02a10_test_pattern_menu);
+
+ if (handler->error) {
+ ret = handler->error;
+ dev_err(&client->dev,
+ "Failed to init controls(%d)\n", ret);
+ goto err_free_handler;
+ }
+
+ ov02a10->subdev.ctrl_handler = handler;
+
+ return 0;
+
+err_free_handler:
+ v4l2_ctrl_handler_free(handler);
+
+ return ret;
+}
+
+static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ u16 id;
+ u8 pid = 0;
+ u8 ver = 0;
+ int ret;
+
+ /* Check sensor revision */
+ ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_H, &pid);
+ if (ret)
+ return ret;
+
+ ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_L, &ver);
+ if (ret)
+ return ret;
+
+ id = OV02A10_ID(pid, ver);
+ if (id != CHIP_ID) {
+ dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id);
+ return ret;
+ }
+ dev_dbg(&client->dev, "Detected OV%04X sensor\n", id);
+
+ return 0;
+}
+
+static int ov02a10_configure_regulators(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ unsigned int i;
+
+ for (i = 0; i < OV02A10_NUM_SUPPLIES; i++)
+ ov02a10->supplies[i].supply = ov02a10_supply_names[i];
+
+ return devm_regulator_bulk_get(&client->dev,
+ OV02A10_NUM_SUPPLIES,
+ ov02a10->supplies);
+}
+
+static int ov02a10_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ov02a10 *ov02a10;
+ u32 rotation;
+ u32 xclk_freq;
+ int ret;
+
+ dev_dbg(dev, "ov02a10 probe\n");
+ ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL);
+ if (!ov02a10)
+ return -ENOMEM;
+
+ v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops);
+ ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10;
+
+ /* optional indication of physical rotation of sensor */
+ ret = fwnode_property_read_u32(dev_fwnode(dev), "rotation",
+ &rotation);
+ if (!ret) {
+ switch (rotation) {
+ case 180:
+ ov02a10->upside_down = true;
+ ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ break;
+ case 0:
+ break;
+ default:
+ dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n",
+ rotation);
+ }
+ }
+
+ /* get system clock (xvclk) */
+ ov02a10->xvclk = devm_clk_get(dev, "xvclk");
+ if (IS_ERR(ov02a10->xvclk)) {
+ dev_err(dev, "Failed to get xvclk\n");
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
+ if (ret) {
+ dev_err(dev, "Failed to get xclk frequency\n");
+ return ret;
+ }
+
+ /* external clock must be 24MHz, allow 1% tolerance */
+ if (xclk_freq < 23760000 || xclk_freq > 24240000) {
+ dev_err(dev, "external clock frequency %u is not supported\n",
+ xclk_freq);
+ return -EINVAL;
+ }
+ dev_dbg(dev, "external clock frequency %u\n", xclk_freq);
+
+ ret = clk_set_rate(ov02a10->xvclk, xclk_freq);
+ if (ret) {
+ dev_err(dev, "Failed to set xvclk frequency (24MHz)\n");
+ return ret;
+ }
+
+ ov02a10->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
+ if (IS_ERR(ov02a10->pwdn_gpio)) {
+ dev_err(dev, "Failed to get powerdown-gpios\n");
+ return -EINVAL;
+ }
+
+ ov02a10->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ov02a10->reset_gpio)) {
+ dev_err(dev, "Failed to get reset-gpios\n");
+ return -EINVAL;
+ }
+
+ ret = ov02a10_configure_regulators(ov02a10);
+ if (ret) {
+ dev_err(dev, "Failed to get power regulators\n");
+ return ret;
+ }
+
+ mutex_init(&ov02a10->mutex);
+ ov02a10->cur_mode = &supported_modes[0];
+ ret = ov02a10_initialize_controls(ov02a10);
+ if (ret) {
+ dev_err(dev, "Failed to initialize controls\n");
+ goto err_destroy_mutex;
+ }
+
+ ret = __ov02a10_power_on(ov02a10);
+ if (ret)
+ goto err_free_handler;
+
+ ret = ov02a10_check_sensor_id(ov02a10);
+ if (ret)
+ goto err_power_off;
+
+ ov02a10->subdev.internal_ops = &ov02a10_internal_ops;
+ ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops;
+ ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad);
+ if (ret < 0) {
+ dev_err(dev, "failed to init entity pads: %d", ret);
+ goto err_power_off;
+ }
+
+ ret = v4l2_async_register_subdev(&ov02a10->subdev);
+ if (ret) {
+ dev_err(dev, "failed to register V4L2 subdev: %d",
+ ret);
+ goto err_clean_entity;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_idle(dev);
+
+ return 0;
+
+err_clean_entity:
+ media_entity_cleanup(&ov02a10->subdev.entity);
+err_power_off:
+ __ov02a10_power_off(ov02a10);
+err_free_handler:
+ v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler);
+err_destroy_mutex:
+ mutex_destroy(&ov02a10->mutex);
+
+ return ret;
+}
+
+static int ov02a10_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov02a10 *ov02a10 = to_ov02a10(sd);
+
+ v4l2_async_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(sd->ctrl_handler);
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev))
+ __ov02a10_power_off(ov02a10);
+ pm_runtime_set_suspended(&client->dev);
+ mutex_destroy(&ov02a10->mutex);
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ov02a10_of_match[] = {
+ { .compatible = "ovti,ov02a10" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ov02a10_of_match);
+#endif
+
+static struct i2c_driver ov02a10_i2c_driver = {
+ .driver = {
+ .name = "ov02a10",
+ .pm = &ov02a10_pm_ops,
+ .of_match_table = ov02a10_of_match,
+ },
+ .probe_new = &ov02a10_probe,
+ .remove = &ov02a10_remove,
+};
+
+module_i2c_driver(ov02a10_i2c_driver);
+
+MODULE_AUTHOR("Dongchun Zhu <dongchun.zhu@mediatek.com>");
+MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver");
+MODULE_LICENSE("GPL v2");
+
--
2.9.2