[V8, 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver

Dongchun Zhu
2020-05-09T08:08:31Z

Add a V4L2 sub-device driver for OV02A10 image sensor.

Signed-off-by: Dongchun Zhu <dongchun.zhu@mediatek.com>
---
MAINTAINERS | 1 +
drivers/media/i2c/Kconfig | 13 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ov02a10.c | 1094 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1109 insertions(+)
create mode 100644 drivers/media/i2c/ov02a10.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 63a2335..e7677c5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12395,6 +12395,7 @@ L: linux-media@vger.kernel.org
S: Maintained
T: git git://linuxtv.org/media_tree.git
F: Documentation/devicetree/bindings/media/i2c/ovti,ov02a10.yaml
+F: drivers/media/i2c/ov02a10.c

OMNIVISION OV13858 SENSOR DRIVER
M: Sakari Ailus <sakari.ailus@linux.intel.com>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 125d596..d8572cd 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -655,6 +655,19 @@ 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
+ select MEDIA_CONTROLLER
+ select VIDEO_V4L2_SUBDEV_API
+ 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 77bf7d0..6566dd9 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..778619e
--- /dev/null
+++ b/drivers/media/i2c/ov02a10.c
@@ -0,0 +1,1094 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2020 MediaTek Inc.
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.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>
+#include <media/v4l2-fwnode.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_MIRROR_FLIP_ENABLE 0x03
+
+/* Bit[7] clock HS mode enable
+ * 0: Clock continue
+ * 1: Clock HS
+ * Bit[6:2] HS VOD adjust
+ * Bit[1:0] P VHI adjust
+ */
+#define REG_HS_MODE_BLC 0x9d
+
+#define CLOCK_HS_MODE_ENABLE BIT(7)
+
+/* Bit[2:0] MIPI transmission speed select */
+#define TX_SPEED_AREA_SEL 0xa1
+
+#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_EXP_SHIFT 8
+#define OV02A10_REG_EXPOSURE_H 0x03
+#define OV02A10_REG_EXPOSURE_L 0x04
+#define OV02A10_EXPOSURE_MIN 4
+#define OV02A10_EXPOSURE_MAX_MARGIN 4
+#define OV02A10_EXPOSURE_STEP 1
+
+#define OV02A10_VTS_SHIFT 8
+#define OV02A10_REG_VTS_H 0x05
+#define OV02A10_REG_VTS_L 0x06
+#define OV02A10_VTS_MAX 0x209f
+#define OV02A10_VTS_MIN 0x04cf
+#define OV02A10_BASIC_LINE 1224
+
+#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
+
+/* Test pattern control */
+#define OV02A10_REG_TEST_PATTERN 0xb6
+#define OV02A10_TEST_PATTERN_ENABLE BIT(0)
+
+#define HZ_PER_MHZ 1000000L
+#define OV02A10_LINK_FREQ_390MHZ (390 * HZ_PER_MHZ)
+#define OV02A10_ECLK_FREQ (24 * HZ_PER_MHZ)
+#define OV02A10_DATA_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 ov02a10_reg {
+ u8 addr;
+ u8 val;
+};
+
+struct ov02a10_reg_list {
+ u32 num_of_regs;
+ const struct ov02a10_reg *regs;
+};
+
+struct ov02a10_mode {
+ u32 width;
+ u32 height;
+ u32 exp_def;
+ u32 hts_def;
+ u32 vts_def;
+ const struct ov02a10_reg_list reg_list;
+};
+
+struct ov02a10 {
+ u32 eclk_freq;
+ u32 mipi_clock_tx_speed;
+
+ struct clk *eclk;
+ struct gpio_desc *pd_gpio;
+ struct gpio_desc *n_rst_gpio;
+ struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES];
+
+ bool streaming;
+ bool upside_down;
+ bool mipi_clock_tx_speed_select_enable;
+ bool mipi_clock_hs_mode_enable;
+
+ /*
+ * 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 *test_pattern;
+ struct v4l2_mbus_framefmt fmt;
+ struct v4l2_ctrl_handler ctrl_handler;
+
+ const struct ov02a10_mode *cur_mode;
+};
+
+static inline struct ov02a10 *to_ov02a10(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ov02a10, subdev);
+}
+
+/*
+ * eclk 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 ov02a10_reg 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, 0x16},
+ {0xa0, 0x29},
+ {0xa1, 0x04},
+ {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},
+};
+
+static const char * const ov02a10_test_pattern_menu[] = {
+ "Disabled",
+ "Color Bar",
+};
+
+static const s64 link_freq_menu_items[] = {
+ OV02A10_LINK_FREQ_390MHZ,
+};
+
+static u64 to_pixel_rate(u32 f_index)
+{
+ u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV02A10_DATA_LANES;
+
+ do_div(pixel_rate, OV02A10_BITS_PER_SAMPLE);
+
+ return pixel_rate;
+}
+
+static const struct ov02a10_mode supported_modes[] = {
+ {
+ .width = 1600,
+ .height = 1200,
+ .exp_def = 0x01ae,
+ .hts_def = 0x03a6,
+ .vts_def = 0x056e,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(ov02a10_1600x1200_regs),
+ .regs = ov02a10_1600x1200_regs,
+ },
+ },
+};
+
+static int ov02a10_write_array(struct ov02a10 *ov02a10,
+ const struct ov02a10_reg_list *r_list)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < r_list->num_of_regs; i++) {
+ ret = i2c_smbus_write_byte_data(client, r_list->regs[i].addr,
+ r_list->regs[i].val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ov02a10_read_smbus(struct ov02a10 *ov02a10, unsigned char reg,
+ unsigned char *val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, reg);
+
+ if (ret < 0)
+ return ret;
+
+ *val = (unsigned char)ret;
+
+ return 0;
+}
+
+static int ov02a10_mod_reg(struct ov02a10 *ov02a10, u8 reg, u8 mask, u8 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ u8 readval;
+ int ret;
+
+ ret = ov02a10_read_smbus(ov02a10, reg, &readval);
+ if (ret)
+ return ret;
+
+ val = (readval & ~mask) | (val & mask);
+
+ return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+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;
+
+ mutex_lock(&ov02a10->mutex);
+
+ if (ov02a10->streaming) {
+ mutex_unlock(&ov02a10->mutex);
+ return -EBUSY;
+ }
+
+ /* Only one sensor mode supported */
+ mbus_fmt->code = ov02a10->fmt.code;
+ ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt);
+ ov02a10->fmt = fmt->format;
+
+ mutex_unlock(&ov02a10->mutex);
+
+ return 0;
+}
+
+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))
+ 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))
+ 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_check_sensor_id(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ u16 id;
+ u8 chip_id_h;
+ u8 chip_id_l;
+ int ret;
+
+ /* Check sensor revision */
+ ret = ov02a10_read_smbus(ov02a10, OV02A10_REG_CHIP_ID_H, &chip_id_h);
+ if (ret)
+ return ret;
+
+ ret = ov02a10_read_smbus(ov02a10, OV02A10_REG_CHIP_ID_L, &chip_id_l);
+ if (ret)
+ return ret;
+
+ id = OV02A10_ID(chip_id_h, chip_id_l);
+ if (id != CHIP_ID) {
+ dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id);
+ return -EINVAL;
+ }
+
+ dev_dbg(&client->dev, "Detected OV%04X sensor\n", id);
+
+ return 0;
+}
+
+static int __maybe_unused ov02a10_power_on(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);
+ int ret;
+
+ gpiod_set_value_cansleep(ov02a10->n_rst_gpio, 0);
+ gpiod_set_value_cansleep(ov02a10->pd_gpio, 0);
+
+ ret = clk_prepare_enable(ov02a10->eclk);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable eclk\n");
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable regulators\n");
+ goto disable_clk;
+ }
+ usleep_range(5000, 6000);
+
+ gpiod_set_value_cansleep(ov02a10->pd_gpio, 1);
+ usleep_range(5000, 6000);
+
+ gpiod_set_value_cansleep(ov02a10->n_rst_gpio, 1);
+ usleep_range(5000, 6000);
+
+ ret = ov02a10_check_sensor_id(ov02a10);
+ if (ret)
+ goto disable_regulator;
+
+ return 0;
+
+disable_regulator:
+ regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies);
+disable_clk:
+ clk_disable_unprepare(ov02a10->eclk);
+
+ return ret;
+}
+
+static int __maybe_unused ov02a10_power_off(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);
+
+ gpiod_set_value_cansleep(ov02a10->n_rst_gpio, 0);
+ clk_disable_unprepare(ov02a10->eclk);
+ gpiod_set_value_cansleep(ov02a10->pd_gpio, 0);
+ regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies);
+
+ return 0;
+}
+
+static int __ov02a10_start_stream(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ const struct ov02a10_reg_list *reg_list;
+ int ret;
+
+ /* Apply default values of current mode */
+ reg_list = &ov02a10->cur_mode->reg_list;
+ ret = ov02a10_write_array(ov02a10, 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 to 180 degree */
+ if (ov02a10->upside_down) {
+ ret = i2c_smbus_write_byte_data(client, REG_MIRROR_FLIP_CONTROL,
+ REG_MIRROR_FLIP_ENABLE);
+ if (ret) {
+ dev_err(&client->dev, "failed to set orientation\n");
+ return ret;
+ }
+ ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Set clock lane transmission mode according to DT property */
+ ret = ov02a10_mod_reg(ov02a10, REG_HS_MODE_BLC, CLOCK_HS_MODE_ENABLE,
+ ov02a10->mipi_clock_hs_mode_enable ?
+ CLOCK_HS_MODE_ENABLE : 0);
+ if (ret < 0)
+ return ret;
+
+ /* Set mipi TX speed according to DT property */
+ if (ov02a10->mipi_clock_tx_speed_select_enable) {
+ ret = i2c_smbus_write_byte_data(client, TX_SPEED_AREA_SEL,
+ ov02a10->mipi_clock_tx_speed);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Set stream on register */
+ return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE,
+ SC_CTRL_MODE_STREAMING);
+}
+
+static int __ov02a10_stop_stream(struct ov02a10 *ov02a10)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+
+ return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE,
+ SC_CTRL_MODE_STANDBY);
+}
+
+static int ov02a10_entity_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg)
+{
+ struct v4l2_subdev_format fmt = {
+ .which = cfg ? V4L2_SUBDEV_FORMAT_TRY
+ : V4L2_SUBDEV_FORMAT_ACTIVE,
+ .format = {
+ .width = 1600,
+ .height = 1200,
+ }
+ };
+
+ ov02a10_set_fmt(sd, 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;
+
+ 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 0;
+
+err_rpm_put:
+ pm_runtime_put(&client->dev);
+unlock_and_return:
+ mutex_unlock(&ov02a10->mutex);
+
+ return ret;
+}
+
+static const struct dev_pm_ops ov02a10_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(ov02a10_power_off, ov02a10_power_on, NULL)
+};
+
+/*
+ * ov02a10_set_exposure - Function called when setting exposure time
+ * @priv: Pointer to device structure
+ * @val: Variable for exposure time, in the unit of micro-second
+ *
+ * Set exposure time based on input value.
+ *
+ * Return: 0 on success
+ */
+static int ov02a10_set_exposure(struct ov02a10 *ov02a10, int val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_H,
+ val >> OV02A10_EXP_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_L, val);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+}
+
+static int ov02a10_set_gain(struct ov02a10 *ov02a10, int val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, OV02A10_REG_GAIN, val);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+}
+
+static int ov02a10_set_vblank(struct ov02a10 *ov02a10, int val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ u32 vts = val + ov02a10->cur_mode->height - OV02A10_BASIC_LINE;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_H,
+ vts >> OV02A10_VTS_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_L, vts);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+}
+
+static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, int pattern)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
+ int ret;
+
+ if (pattern)
+ pattern = OV02A10_TEST_PATTERN_ENABLE;
+
+ ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, OV02A10_REG_TEST_PATTERN,
+ pattern);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
+ REG_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE,
+ SC_CTRL_MODE_STREAMING);
+}
+
+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 -
+ OV02A10_EXPOSURE_MAX_MARGIN;
+ __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_set_exposure(ov02a10, ctrl->val);
+ break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = ov02a10_set_gain(ov02a10, ctrl->val);
+ break;
+ case V4L2_CID_VBLANK:
+ ret = ov02a10_set_vblank(ov02a10, ctrl->val);
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ ret = ov02a10_set_test_pattern(ov02a10, ctrl->val);
+ break;
+ default:
+ 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_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, 7);
+ 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 = to_pixel_rate(0);
+ 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_hwcfg(struct device *dev, struct ov02a10 *ov02a10)
+{
+ struct fwnode_handle *ep;
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY,
+ };
+ unsigned int i, j;
+ int ret;
+
+ if (!fwnode)
+ return -EINVAL;
+
+ ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
+ if (!ep)
+ return -ENXIO;
+
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+ fwnode_handle_put(ep);
+ if (ret)
+ return ret;
+
+ /* Optional indication of mipi clock lane mode */
+ if (bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK)
+ ov02a10->mipi_clock_hs_mode_enable = true;
+
+ if (!bus_cfg.nr_of_link_frequencies) {
+ dev_err(dev, "no link frequencies defined");
+ ret = -EINVAL;
+ goto check_hwcfg_error;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
+ for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
+ if (link_freq_menu_items[i] ==
+ bus_cfg.link_frequencies[j])
+ break;
+ }
+
+ if (j == bus_cfg.nr_of_link_frequencies) {
+ dev_err(dev, "no link frequency %lld supported",
+ link_freq_menu_items[i]);
+ ret = -EINVAL;
+ goto check_hwcfg_error;
+ }
+ }
+
+check_hwcfg_error:
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+
+ return ret;
+}
+
+static int ov02a10_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ov02a10 *ov02a10;
+ unsigned int rotation;
+ unsigned int clock_lane_tx_speed;
+ unsigned int i;
+ int ret;
+
+ ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL);
+ if (!ov02a10)
+ return -ENOMEM;
+
+ ret = ov02a10_check_hwcfg(dev, ov02a10);
+ if (ret) {
+ dev_err(dev, "failed to check HW configuration: %d", ret);
+ return ret;
+ }
+
+ v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops);
+ ov02a10->upside_down = false;
+ ov02a10->mipi_clock_tx_speed_select_enable = false;
+ 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) {
+ if (rotation == 180) {
+ ov02a10->upside_down = true;
+ ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ }
+ }
+
+ /* Optional indication of mipi TX speed */
+ ret = fwnode_property_read_u32(dev_fwnode(dev), "ovti,mipi-tx-speed",
+ &clock_lane_tx_speed);
+
+ if (!ret) {
+ ov02a10->mipi_clock_tx_speed_select_enable = true;
+ ov02a10->mipi_clock_tx_speed = clock_lane_tx_speed;
+ }
+
+ /* Get system clock (eclk) */
+ ov02a10->eclk = devm_clk_get(dev, "eclk");
+ if (IS_ERR(ov02a10->eclk)) {
+ ret = PTR_ERR(ov02a10->eclk);
+ dev_err(dev, "failed to get eclk %d\n", ret);
+ return ret;
+ }
+
+ ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
+ &ov02a10->eclk_freq);
+ if (ret) {
+ dev_err(dev, "failed to get eclk frequency\n");
+ return ret;
+ }
+
+ ret = clk_set_rate(ov02a10->eclk, ov02a10->eclk_freq);
+ if (ret) {
+ dev_err(dev, "failed to set eclk frequency (24MHz)\n");
+ return ret;
+ }
+
+ if (clk_get_rate(ov02a10->eclk) != OV02A10_ECLK_FREQ) {
+ dev_warn(dev, "wrong eclk frequency %d Hz, expected: %d Hz\n",
+ ov02a10->eclk_freq, OV02A10_ECLK_FREQ);
+ return -EINVAL;
+ }
+
+ ov02a10->pd_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(ov02a10->pd_gpio)) {
+ ret = PTR_ERR(ov02a10->pd_gpio);
+ dev_err(dev, "failed to get powerdown-gpios %d\n", ret);
+ return ret;
+ }
+
+ ov02a10->n_rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ov02a10->n_rst_gpio)) {
+ ret = PTR_ERR(ov02a10->n_rst_gpio);
+ dev_err(dev, "failed to get reset-gpios %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < OV02A10_NUM_SUPPLIES; i++)
+ ov02a10->supplies[i].supply = ov02a10_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, OV02A10_NUM_SUPPLIES,
+ ov02a10->supplies);
+ if (ret) {
+ dev_err(dev, "failed to get 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;
+ }
+
+ 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_free_handler;
+ }
+
+ pm_runtime_enable(dev);
+ if (!pm_runtime_enabled(dev)) {
+ ret = ov02a10_power_on(dev);
+ if (ret < 0) {
+ dev_err(dev, "failed to power on: %d\n", ret);
+ goto err_clean_entity;
+ }
+ }
+
+ ret = v4l2_async_register_subdev(&ov02a10->subdev);
+ if (ret) {
+ dev_err(dev, "failed to register V4L2 subdev: %d", ret);
+ goto err_clean_entity;
+ }
+
+ return 0;
+
+err_clean_entity:
+ media_entity_cleanup(&ov02a10->subdev.entity);
+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(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ mutex_destroy(&ov02a10->mutex);
+
+ return 0;
+}
+
+static const struct of_device_id ov02a10_of_match[] = {
+ { .compatible = "ovti,ov02a10" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ov02a10_of_match);
+
+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