--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ov2685 driver
+ *
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ */
+
+#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 <linux/sysfs.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+#define CHIP_ID 0x2685
+#define OV2685_REG_CHIP_ID 0x300a
+
+#define OV2685_XVCLK_FREQ 24000000
+
+#define REG_SC_CTRL_MODE 0x0100
+#define SC_CTRL_MODE_STANDBY 0x0
+#define SC_CTRL_MODE_STREAMING BIT(0)
+
+#define OV2685_REG_EXPOSURE 0x3500
+#define OV2685_EXPOSURE_MIN 4
+#define OV2685_EXPOSURE_STEP 1
+
+#define OV2685_REG_VTS 0x380e
+#define OV2685_VTS_MAX 0x7fff
+
+#define OV2685_REG_GAIN 0x350a
+#define OV2685_GAIN_MIN 0
+#define OV2685_GAIN_MAX 0x07ff
+#define OV2685_GAIN_STEP 0x1
+#define OV2685_GAIN_DEFAULT 0x0036
+
+#define OV2685_REG_TEST_PATTERN 0x5080
+#define OV2685_TEST_PATTERN_DISABLED 0x00
+#define OV2685_TEST_PATTERN_COLOR_BAR 0x80
+#define OV2685_TEST_PATTERN_RANDOM 0x81
+#define OV2685_TEST_PATTERN_COLOR_BAR_FADE 0x88
+#define OV2685_TEST_PATTERN_BW_SQUARE 0x92
+#define OV2685_TEST_PATTERN_COLOR_SQUARE 0x82
+
+#define REG_NULL 0xFFFF
+
+#define OV2685_REG_VALUE_08BIT 1
+#define OV2685_REG_VALUE_16BIT 2
+#define OV2685_REG_VALUE_24BIT 3
+
+#define OV2685_LANES 1
+#define OV2685_BITS_PER_SAMPLE 10
+
+static const char * const ov2685_supply_names[] = {
+ "avdd", /* Analog power */
+ "dovdd", /* Digital I/O power */
+ "dvdd", /* Digital core power */
+};
+
+#define OV2685_NUM_SUPPLIES ARRAY_SIZE(ov2685_supply_names)
+
+struct regval {
+ u16 addr;
+ u8 val;
+};
+
+struct ov2685_mode {
+ u32 width;
+ u32 height;
+ u32 exp_def;
+ u32 hts_def;
+ u32 vts_def;
+ const struct regval *reg_list;
+};
+
+struct ov2685 {
+ struct i2c_client *client;
+ struct clk *xvclk;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data supplies[OV2685_NUM_SUPPLIES];
+
+ bool 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_ctrl_handler ctrl_handler;
+
+ const struct ov2685_mode *cur_mode;
+};
+
+#define to_ov2685(sd) container_of(sd, struct ov2685, subdev)
+
+/* PLL settings bases on 24M xvclk */
+static struct regval ov2685_1600x1200_regs[] = {
+ {0x0103, 0x01},
+ {0x0100, 0x00},
+ {0x3002, 0x00},
+ {0x3016, 0x1c},
+ {0x3018, 0x44},
+ {0x301d, 0xf0},
+ {0x3020, 0x00},
+ {0x3082, 0x37},
+ {0x3083, 0x03},
+ {0x3084, 0x09},
+ {0x3085, 0x04},
+ {0x3086, 0x00},
+ {0x3087, 0x00},
+ {0x3501, 0x4e},
+ {0x3502, 0xe0},
+ {0x3503, 0x07},
+ {0x350b, 0x36},
+ {0x3600, 0xb4},
+ {0x3603, 0x35},
+ {0x3604, 0x24},
+ {0x3605, 0x00},
+ {0x3620, 0x24},
+ {0x3621, 0x34},
+ {0x3622, 0x03},
+ {0x3628, 0x10},
+ {0x3705, 0x3c},
+ {0x370a, 0x21},
+ {0x370c, 0x50},
+ {0x370d, 0xc0},
+ {0x3717, 0x58},
+ {0x3718, 0x80},
+ {0x3720, 0x00},
+ {0x3721, 0x09},
+ {0x3722, 0x06},
+ {0x3723, 0x59},
+ {0x3738, 0x99},
+ {0x3781, 0x80},
+ {0x3784, 0x0c},
+ {0x3789, 0x60},
+ {0x3800, 0x00},
+ {0x3801, 0x00},
+ {0x3802, 0x00},
+ {0x3803, 0x00},
+ {0x3804, 0x06},
+ {0x3805, 0x4f},
+ {0x3806, 0x04},
+ {0x3807, 0xbf},
+ {0x3808, 0x06},
+ {0x3809, 0x40},
+ {0x380a, 0x04},
+ {0x380b, 0xb0},
+ {0x380c, 0x06},
+ {0x380d, 0xa4},
+ {0x380e, 0x05},
+ {0x380f, 0x0e},
+ {0x3810, 0x00},
+ {0x3811, 0x08},
+ {0x3812, 0x00},
+ {0x3813, 0x08},
+ {0x3814, 0x11},
+ {0x3815, 0x11},
+ {0x3819, 0x04},
+ {0x3820, 0xc0},
+ {0x3821, 0x00},
+ {0x3a06, 0x01},
+ {0x3a07, 0x84},
+ {0x3a08, 0x01},
+ {0x3a09, 0x43},
+ {0x3a0a, 0x24},
+ {0x3a0b, 0x60},
+ {0x3a0c, 0x28},
+ {0x3a0d, 0x60},
+ {0x3a0e, 0x04},
+ {0x3a0f, 0x8c},
+ {0x3a10, 0x05},
+ {0x3a11, 0x0c},
+ {0x4000, 0x81},
+ {0x4001, 0x40},
+ {0x4008, 0x02},
+ {0x4009, 0x09},
+ {0x4300, 0x00},
+ {0x430e, 0x00},
+ {0x4602, 0x02},
+ {0x481b, 0x40},
+ {0x481f, 0x40},
+ {0x4837, 0x18},
+ {0x5000, 0x1f},
+ {0x5001, 0x05},
+ {0x5002, 0x30},
+ {0x5003, 0x04},
+ {0x5004, 0x00},
+ {0x5005, 0x0c},
+ {0x5280, 0x15},
+ {0x5281, 0x06},
+ {0x5282, 0x06},
+ {0x5283, 0x08},
+ {0x5284, 0x1c},
+ {0x5285, 0x1c},
+ {0x5286, 0x20},
+ {0x5287, 0x10},
+ {REG_NULL, 0x00}
+};
+
+#define OV2685_LINK_FREQ_330MHZ 330000000
+static const s64 link_freq_menu_items[] = {
+ OV2685_LINK_FREQ_330MHZ
+};
+
+static const char * const ov2685_test_pattern_menu[] = {
+ "Disabled",
+ "Color Bar",
+ "Color Bar FADE",
+ "Random Data",
+ "Black White Square",
+ "Color Square"
+};
+
+static const int ov2685_test_pattern_val[] = {
+ OV2685_TEST_PATTERN_DISABLED,
+ OV2685_TEST_PATTERN_COLOR_BAR,
+ OV2685_TEST_PATTERN_COLOR_BAR_FADE,
+ OV2685_TEST_PATTERN_RANDOM,
+ OV2685_TEST_PATTERN_BW_SQUARE,
+ OV2685_TEST_PATTERN_COLOR_SQUARE,
+};
+
+static const struct ov2685_mode supported_modes[] = {
+ {
+ .width = 1600,
+ .height = 1200,
+ .exp_def = 0x04ee,
+ .hts_def = 0x06a4,
+ .vts_def = 0x050e,
+ .reg_list = ov2685_1600x1200_regs,
+ },
+};
+
+/* Write registers up to 4 at a time */
+static int ov2685_write_reg(struct i2c_client *client, u16 reg,
+ u32 len, u32 val)
+{
+ u32 val_i, buf_i;
+ u8 buf[6];
+ u8 *val_p;
+ __be32 val_be;
+
+ if (len > 4)
+ return -EINVAL;
+
+ buf[0] = reg >> 8;
+ buf[1] = reg & 0xff;
+
+ val_be = cpu_to_be32(val);
+ val_p = (u8 *)&val_be;
+ buf_i = 2;
+ val_i = 4 - len;
+
+ while (val_i < 4)
+ buf[buf_i++] = val_p[val_i++];
+
+ if (i2c_master_send(client, buf, len + 2) != len + 2)
+ return -EIO;
+
+ return 0;
+}
+
+static int ov2685_write_array(struct i2c_client *client,
+ const struct regval *regs)
+{
+ int ret = 0;
+ u32 i;
+
+ for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
+ ret = ov2685_write_reg(client, regs[i].addr,
+ OV2685_REG_VALUE_08BIT, regs[i].val);
+
+ return ret;
+}
+
+/* Read registers up to 4 at a time */
+static int ov2685_read_reg(struct i2c_client *client, u16 reg,
+ u32 len, u32 *val)
+{
+ struct i2c_msg msgs[2];
+ u8 *data_be_p;
+ __be32 data_be = 0;
+ __be16 reg_addr_be = cpu_to_be16(reg);
+ int ret;
+
+ if (len > 4)
+ return -EINVAL;
+
+ data_be_p = (u8 *)&data_be;
+ /* Write register address */
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = 2;
+ msgs[0].buf = (u8 *)®_addr_be;
+
+ /* Read data from register */
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = len;
+ msgs[1].buf = &data_be_p[4 - len];
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs))
+ return -EIO;
+
+ *val = be32_to_cpu(data_be);
+
+ return 0;
+}
+
+static void ov2685_fill_fmt(const struct ov2685_mode *mode,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+ fmt->width = mode->width;
+ fmt->height = mode->height;
+ fmt->field = V4L2_FIELD_NONE;
+}
+
+static int ov2685_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ov2685 *ov2685 = to_ov2685(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
+
+ /* only one mode supported for now */
+ ov2685_fill_fmt(ov2685->cur_mode, mbus_fmt);
+
+ return 0;
+}
+
+static int ov2685_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ov2685 *ov2685 = to_ov2685(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
+
+ ov2685_fill_fmt(ov2685->cur_mode, mbus_fmt);
+
+ return 0;
+}
+
+static int ov2685_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(supported_modes))
+ return -EINVAL;
+
+ code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+
+ return 0;
+}
+
+static int ov2685_enum_frame_sizes(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ int index = fse->index;
+
+ if (index >= ARRAY_SIZE(supported_modes))
+ return -EINVAL;
+
+ fse->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+
+ fse->min_width = supported_modes[index].width;
+ fse->max_width = supported_modes[index].width;
+ fse->max_height = supported_modes[index].height;
+ fse->min_height = supported_modes[index].height;
+
+ return 0;
+}
+
+/* Calculate the delay in us by clock rate and clock cycles */
+static inline u32 ov2685_cal_delay(u32 cycles)
+{
+ return DIV_ROUND_UP(cycles, OV2685_XVCLK_FREQ / 1000 / 1000);
+}
+
+static int __ov2685_power_on(struct ov2685 *ov2685)
+{
+ int ret;
+ u32 delay_us;
+ struct device *dev = &ov2685->client->dev;
+
+ ret = clk_prepare_enable(ov2685->xvclk);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable xvclk\n");
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(ov2685->reset_gpio, 1);
+
+ ret = regulator_bulk_enable(OV2685_NUM_SUPPLIES, ov2685->supplies);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable regulators\n");
+ goto disable_clk;
+ }
+
+ /* The minimum delay between power supplies and reset rising can be 0 */
+ gpiod_set_value_cansleep(ov2685->reset_gpio, 0);
+ /* 8192 xvclk cycles prior to the first SCCB transaction */
+ delay_us = ov2685_cal_delay(8192);
+ usleep_range(delay_us, delay_us * 2);
+
+ /* HACK: ov2685 would output messy data after reset(R0103),
+ * writing register before .s_stream() as a workaround
+ */
+ ret = ov2685_write_array(ov2685->client, ov2685->cur_mode->reg_list);
+ if (ret)
+ goto disable_supplies;
+
+ return 0;
+
+disable_supplies:
+ regulator_bulk_disable(OV2685_NUM_SUPPLIES, ov2685->supplies);
+disable_clk:
+ clk_disable_unprepare(ov2685->xvclk);
+
+ return ret;
+}
+
+static void __ov2685_power_off(struct ov2685 *ov2685)
+{
+ /* 512 xvclk cycles after the last SCCB transaction or MIPI frame end */
+ u32 delay_us = ov2685_cal_delay(512);
+
+ usleep_range(delay_us, delay_us * 2);
+ clk_disable_unprepare(ov2685->xvclk);
+ gpiod_set_value_cansleep(ov2685->reset_gpio, 1);
+ regulator_bulk_disable(OV2685_NUM_SUPPLIES, ov2685->supplies);
+}
+
+static int ov2685_s_stream(struct v4l2_subdev *sd, int on)
+{
+ struct ov2685 *ov2685 = to_ov2685(sd);
+ struct i2c_client *client = ov2685->client;
+ int ret = 0;
+
+ mutex_lock(&ov2685->mutex);
+
+ on = !!on;
+ if (on == ov2685->streaming)
+ goto unlock_and_return;
+
+ if (on) {
+ ret = pm_runtime_get_sync(&ov2685->client->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&client->dev);
+ goto unlock_and_return;
+ }
+ ret = __v4l2_ctrl_handler_setup(&ov2685->ctrl_handler);
+ if (ret) {
+ pm_runtime_put(&client->dev);
+ goto unlock_and_return;
+ }
+ ret = ov2685_write_reg(client, REG_SC_CTRL_MODE,
+ OV2685_REG_VALUE_08BIT, SC_CTRL_MODE_STREAMING);
+ if (ret) {
+ pm_runtime_put(&client->dev);
+ goto unlock_and_return;
+ }
+ } else {
+ ov2685_write_reg(client, REG_SC_CTRL_MODE,
+ OV2685_REG_VALUE_08BIT, SC_CTRL_MODE_STANDBY);
+ pm_runtime_put(&ov2685->client->dev);
+ }
+
+ ov2685->streaming = on;
+
+unlock_and_return:
+ mutex_unlock(&ov2685->mutex);
+
+ return ret;
+}
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+static int ov2685_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct ov2685 *ov2685 = to_ov2685(sd);
+ struct v4l2_mbus_framefmt *try_fmt;
+
+ mutex_lock(&ov2685->mutex);
+
+ try_fmt = v4l2_subdev_get_try_format(sd, fh->pad, 0);
+ /* Initialize try_fmt */
+ ov2685_fill_fmt(&supported_modes[0], try_fmt);
+
+ mutex_unlock(&ov2685->mutex);
+
+ return 0;
+}
+#endif
+
+static int ov2685_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2685 *ov2685 = to_ov2685(sd);
+
+ return __ov2685_power_on(ov2685);
+}
+
+static int ov2685_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2685 *ov2685 = to_ov2685(sd);
+
+ __ov2685_power_off(ov2685);
+
+ return 0;
+}
+
+static const struct dev_pm_ops ov2685_pm_ops = {
+ SET_RUNTIME_PM_OPS(ov2685_runtime_suspend,
+ ov2685_runtime_resume, NULL)
+};
+
+static int ov2685_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct ov2685 *ov2685 = container_of(ctrl->handler,
+ struct ov2685, ctrl_handler);
+ struct i2c_client *client = ov2685->client;
+ s64 max_expo;
+ int ret;
+
+ /* Propagate change of current control to all related controls */
+ switch (ctrl->id) {
+ case V4L2_CID_VBLANK:
+ /* Update max exposure while meeting expected vblanking */
+ max_expo = ov2685->cur_mode->height + ctrl->val - 4;
+ __v4l2_ctrl_modify_range(ov2685->exposure,
+ ov2685->exposure->minimum, max_expo,
+ ov2685->exposure->step,
+ ov2685->exposure->default_value);
+ break;
+ }
+
+ if (pm_runtime_get_if_in_use(&client->dev) <= 0)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ ret = ov2685_write_reg(ov2685->client, OV2685_REG_EXPOSURE,
+ OV2685_REG_VALUE_24BIT, ctrl->val << 4);
+ break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = ov2685_write_reg(ov2685->client, OV2685_REG_GAIN,
+ OV2685_REG_VALUE_16BIT, ctrl->val);
+ break;
+ case V4L2_CID_VBLANK:
+ ret = ov2685_write_reg(ov2685->client, OV2685_REG_VTS,
+ OV2685_REG_VALUE_16BIT,
+ ctrl->val + ov2685->cur_mode->height);
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ ret = ov2685_write_reg(ov2685->client, OV2685_REG_TEST_PATTERN,
+ OV2685_REG_VALUE_08BIT,
+ ov2685_test_pattern_val[ctrl->val]);
+ break;
+ default:
+ dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
+ __func__, ctrl->id, ctrl->val);
+ break;
+ };
+
+ pm_runtime_put(&client->dev);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_video_ops ov2685_video_ops = {
+ .s_stream = ov2685_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ov2685_pad_ops = {
+ .enum_mbus_code = ov2685_enum_mbus_code,
+ .enum_frame_size = ov2685_enum_frame_sizes,
+ .get_fmt = ov2685_get_fmt,
+ .set_fmt = ov2685_set_fmt,
+};
+
+static const struct v4l2_subdev_ops ov2685_subdev_ops = {
+ .video = &ov2685_video_ops,
+ .pad = &ov2685_pad_ops,
+};
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+static const struct v4l2_subdev_internal_ops ov2685_internal_ops = {
+ .open = ov2685_open,
+};
+#endif
+
+static const struct v4l2_ctrl_ops ov2685_ctrl_ops = {
+ .s_ctrl = ov2685_set_ctrl,
+};
+
+static int ov2685_initialize_controls(struct ov2685 *ov2685)
+{
+ const struct ov2685_mode *mode;
+ struct v4l2_ctrl_handler *handler;
+ struct v4l2_ctrl *ctrl;
+ u64 exposure_max;
+ u32 pixel_rate, h_blank;
+ int ret;
+
+ handler = &ov2685->ctrl_handler;
+ mode = ov2685->cur_mode;
+ ret = v4l2_ctrl_handler_init(handler, 8);
+ if (ret)
+ return ret;
+ handler->lock = &ov2685->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 * OV2685_LANES) /
+ OV2685_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;
+ ov2685->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
+ h_blank, h_blank, 1, h_blank);
+ if (ov2685->hblank)
+ ov2685->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ ov2685->vblank = v4l2_ctrl_new_std(handler, &ov2685_ctrl_ops,
+ V4L2_CID_VBLANK, mode->vts_def - mode->height,
+ OV2685_VTS_MAX - mode->height, 1,
+ mode->vts_def - mode->height);
+
+ exposure_max = mode->vts_def - 4;
+ ov2685->exposure = v4l2_ctrl_new_std(handler, &ov2685_ctrl_ops,
+ V4L2_CID_EXPOSURE, OV2685_EXPOSURE_MIN,
+ exposure_max, OV2685_EXPOSURE_STEP,
+ mode->exp_def);
+
+ ov2685->anal_gain = v4l2_ctrl_new_std(handler, &ov2685_ctrl_ops,
+ V4L2_CID_ANALOGUE_GAIN, OV2685_GAIN_MIN,
+ OV2685_GAIN_MAX, OV2685_GAIN_STEP,
+ OV2685_GAIN_DEFAULT);
+
+ ov2685->test_pattern = v4l2_ctrl_new_std_menu_items(handler,
+ &ov2685_ctrl_ops, V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(ov2685_test_pattern_menu) - 1,
+ 0, 0, ov2685_test_pattern_menu);
+
+ if (handler->error) {
+ ret = handler->error;
+ dev_err(&ov2685->client->dev,
+ "Failed to init controls(%d)\n", ret);
+ goto err_free_handler;
+ }
+
+ ov2685->subdev.ctrl_handler = handler;
+
+ return 0;
+
+err_free_handler:
+ v4l2_ctrl_handler_free(handler);
+
+ return ret;
+}
+
+static int ov2685_check_sensor_id(struct ov2685 *ov2685,
+ struct i2c_client *client)
+{
+ struct device *dev = &ov2685->client->dev;
+ int ret;
+ u32 id = 0;
+
+ ret = ov2685_read_reg(client, OV2685_REG_CHIP_ID,
+ OV2685_REG_VALUE_16BIT, &id);
+ if (id != CHIP_ID) {
+ dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret);
+ return ret;
+ }
+
+ dev_info(dev, "Detected OV%04x sensor\n", CHIP_ID);
+
+ return 0;
+}
+
+static int ov2685_configure_regulators(struct ov2685 *ov2685)
+{
+ int i;
+
+ for (i = 0; i < OV2685_NUM_SUPPLIES; i++)
+ ov2685->supplies[i].supply = ov2685_supply_names[i];
+
+ return devm_regulator_bulk_get(&ov2685->client->dev,
+ OV2685_NUM_SUPPLIES,
+ ov2685->supplies);
+}
+
+static int ov2685_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ov2685 *ov2685;
+ int ret;
+
+ ov2685 = devm_kzalloc(dev, sizeof(*ov2685), GFP_KERNEL);
+ if (!ov2685)
+ return -ENOMEM;
+
+ ov2685->client = client;
+ ov2685->cur_mode = &supported_modes[0];
+
+ ov2685->xvclk = devm_clk_get(dev, "xvclk");
+ if (IS_ERR(ov2685->xvclk)) {
+ dev_err(dev, "Failed to get xvclk\n");
+ return -EINVAL;
+ }
+ ret = clk_set_rate(ov2685->xvclk, OV2685_XVCLK_FREQ);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set xvclk rate (24MHz)\n");
+ return ret;
+ }
+ if (clk_get_rate(ov2685->xvclk) != OV2685_XVCLK_FREQ)
+ dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
+
+ ov2685->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ov2685->reset_gpio)) {
+ dev_err(dev, "Failed to get reset-gpios\n");
+ return -EINVAL;
+ }
+
+ ret = ov2685_configure_regulators(ov2685);
+ if (ret) {
+ dev_err(dev, "Failed to get power regulators\n");
+ return ret;
+ }
+
+ mutex_init(&ov2685->mutex);
+ v4l2_i2c_subdev_init(&ov2685->subdev, client, &ov2685_subdev_ops);
+ ret = ov2685_initialize_controls(ov2685);
+ if (ret)
+ goto err_destroy_mutex;
+
+ ret = __ov2685_power_on(ov2685);
+ if (ret)
+ goto err_free_handler;
+
+ ret = ov2685_check_sensor_id(ov2685, client);
+ if (ret)
+ goto err_power_off;
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+ ov2685->subdev.internal_ops = &ov2685_internal_ops;
+ ov2685->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+#endif
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ ov2685->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ov2685->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ret = media_entity_pads_init(&ov2685->subdev.entity, 1, &ov2685->pad);
+ if (ret < 0)
+ goto err_power_off;
+#endif
+
+ ret = v4l2_async_register_subdev(&ov2685->subdev);
+ if (ret) {
+ dev_err(dev, "v4l2 async register subdev failed\n");
+ goto err_clean_entity;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_idle(dev);
+
+ return 0;
+
+err_clean_entity:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ media_entity_cleanup(&ov2685->subdev.entity);
+#endif
+err_power_off:
+ __ov2685_power_off(ov2685);
+err_free_handler:
+ v4l2_ctrl_handler_free(&ov2685->ctrl_handler);
+err_destroy_mutex:
+ mutex_destroy(&ov2685->mutex);
+
+ return ret;
+}
+
+static int ov2685_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2685 *ov2685 = to_ov2685(sd);
+
+ v4l2_async_unregister_subdev(sd);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ media_entity_cleanup(&sd->entity);
+#endif
+ v4l2_ctrl_handler_free(&ov2685->ctrl_handler);
+ mutex_destroy(&ov2685->mutex);
+
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev))
+ __ov2685_power_off(ov2685);
+ pm_runtime_set_suspended(&client->dev);
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ov2685_of_match[] = {
+ { .compatible = "ovti,ov2685" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ov2685_of_match);
+#endif
+
+static struct i2c_driver ov2685_i2c_driver = {
+ .driver = {
+ .name = "ov2685",
+ .owner = THIS_MODULE,
+ .pm = &ov2685_pm_ops,
+ .of_match_table = of_match_ptr(ov2685_of_match),
+ },
+ .probe = &ov2685_probe,
+ .remove = &ov2685_remove,
+};
+
+module_i2c_driver(ov2685_i2c_driver);
+
+MODULE_DESCRIPTION("OmniVision ov2685 sensor driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-starfive.git / commitdiff