diff options
Diffstat (limited to 'drivers/media/i2c/ov6211.c')
| -rw-r--r-- | drivers/media/i2c/ov6211.c | 793 |
1 files changed, 793 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov6211.c b/drivers/media/i2c/ov6211.c new file mode 100644 index 000000000000..e3ac5ecf27d1 --- /dev/null +++ b/drivers/media/i2c/ov6211.c @@ -0,0 +1,793 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2024-2025 Linaro Ltd + +#include <linux/clk.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/units.h> +#include <media/v4l2-cci.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-fwnode.h> + +#define OV6211_LINK_FREQ_480MHZ (480 * HZ_PER_MHZ) +#define OV6211_MCLK_FREQ_24MHZ (24 * HZ_PER_MHZ) + +#define OV6211_REG_CHIP_ID CCI_REG16(0x300a) +#define OV6211_CHIP_ID 0x6710 + +#define OV6211_REG_MODE_SELECT CCI_REG8(0x0100) +#define OV6211_MODE_STANDBY 0x00 +#define OV6211_MODE_STREAMING BIT(0) + +#define OV6211_REG_SOFTWARE_RST CCI_REG8(0x0103) +#define OV6211_SOFTWARE_RST BIT(0) + +/* Exposure controls from sensor */ +#define OV6211_REG_EXPOSURE CCI_REG24(0x3500) +#define OV6211_EXPOSURE_MIN 1 +#define OV6211_EXPOSURE_MAX_MARGIN 4 +#define OV6211_EXPOSURE_STEP 1 +#define OV6211_EXPOSURE_DEFAULT 210 + +/* Analogue gain controls from sensor */ +#define OV6211_REG_ANALOGUE_GAIN CCI_REG16(0x350a) +#define OV6211_ANALOGUE_GAIN_MIN 1 +#define OV6211_ANALOGUE_GAIN_MAX 0x3ff +#define OV6211_ANALOGUE_GAIN_STEP 1 +#define OV6211_ANALOGUE_GAIN_DEFAULT 160 + +/* Test pattern */ +#define OV6211_REG_PRE_ISP CCI_REG8(0x5e00) +#define OV6211_TEST_PATTERN_ENABLE BIT(7) + +#define to_ov6211(_sd) container_of(_sd, struct ov6211, sd) + +static const s64 ov6211_link_freq_menu[] = { + OV6211_LINK_FREQ_480MHZ, +}; + +struct ov6211_reg_list { + const struct cci_reg_sequence *regs; + unsigned int num_regs; +}; + +struct ov6211_mode { + u32 width; /* Frame width in pixels */ + u32 height; /* Frame height in pixels */ + u32 hts; /* Horizontal timing size */ + u32 vts; /* Default vertical timing size */ + u32 bpp; /* Bits per pixel */ + + const struct ov6211_reg_list reg_list; /* Sensor register setting */ +}; + +static const char * const ov6211_test_pattern_menu[] = { + "Disabled", + "Vertical Colour Bars", +}; + +static const char * const ov6211_supply_names[] = { + "avdd", /* Analog power */ + "dovdd", /* Digital I/O power */ + "dvdd", /* Digital core power */ +}; + +#define OV6211_NUM_SUPPLIES ARRAY_SIZE(ov6211_supply_names) + +struct ov6211 { + struct device *dev; + struct regmap *regmap; + struct clk *xvclk; + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[OV6211_NUM_SUPPLIES]; + + struct v4l2_subdev sd; + struct media_pad pad; + + struct v4l2_ctrl_handler ctrl_handler; + + /* Saved register values */ + u64 pre_isp; +}; + +static const struct cci_reg_sequence ov6211_400x400_120fps_mode[] = { + { CCI_REG8(0x3005), 0x00 }, + { CCI_REG8(0x3013), 0x12 }, + { CCI_REG8(0x3014), 0x04 }, + { CCI_REG8(0x3016), 0x10 }, + { CCI_REG8(0x3017), 0x00 }, + { CCI_REG8(0x3018), 0x00 }, + { CCI_REG8(0x301a), 0x00 }, + { CCI_REG8(0x301b), 0x00 }, + { CCI_REG8(0x301c), 0x00 }, + { CCI_REG8(0x3037), 0xf0 }, + { CCI_REG8(0x3080), 0x01 }, + { CCI_REG8(0x3081), 0x00 }, + { CCI_REG8(0x3082), 0x01 }, + { CCI_REG8(0x3098), 0x04 }, + { CCI_REG8(0x3099), 0x28 }, + { CCI_REG8(0x309a), 0x06 }, + { CCI_REG8(0x309b), 0x04 }, + { CCI_REG8(0x309c), 0x00 }, + { CCI_REG8(0x309d), 0x00 }, + { CCI_REG8(0x309e), 0x01 }, + { CCI_REG8(0x309f), 0x00 }, + { CCI_REG8(0x30b0), 0x08 }, + { CCI_REG8(0x30b1), 0x02 }, + { CCI_REG8(0x30b2), 0x00 }, + { CCI_REG8(0x30b3), 0x28 }, + { CCI_REG8(0x30b4), 0x02 }, + { CCI_REG8(0x30b5), 0x00 }, + { CCI_REG8(0x3106), 0xd9 }, + { CCI_REG8(0x3503), 0x07 }, + { CCI_REG8(0x3509), 0x10 }, + { CCI_REG8(0x3600), 0xfc }, + { CCI_REG8(0x3620), 0xb7 }, + { CCI_REG8(0x3621), 0x05 }, + { CCI_REG8(0x3626), 0x31 }, + { CCI_REG8(0x3627), 0x40 }, + { CCI_REG8(0x3632), 0xa3 }, + { CCI_REG8(0x3633), 0x34 }, + { CCI_REG8(0x3634), 0x40 }, + { CCI_REG8(0x3636), 0x00 }, + { CCI_REG8(0x3660), 0x80 }, + { CCI_REG8(0x3662), 0x03 }, + { CCI_REG8(0x3664), 0xf0 }, + { CCI_REG8(0x366a), 0x10 }, + { CCI_REG8(0x366b), 0x06 }, + { CCI_REG8(0x3680), 0xf4 }, + { CCI_REG8(0x3681), 0x50 }, + { CCI_REG8(0x3682), 0x00 }, + { CCI_REG8(0x3708), 0x20 }, + { CCI_REG8(0x3709), 0x40 }, + { CCI_REG8(0x370d), 0x03 }, + { CCI_REG8(0x373b), 0x02 }, + { CCI_REG8(0x373c), 0x08 }, + { CCI_REG8(0x3742), 0x00 }, + { CCI_REG8(0x3744), 0x16 }, + { CCI_REG8(0x3745), 0x08 }, + { CCI_REG8(0x3781), 0xfc }, + { CCI_REG8(0x3788), 0x00 }, + { CCI_REG8(0x3800), 0x00 }, + { CCI_REG8(0x3801), 0x04 }, + { CCI_REG8(0x3802), 0x00 }, + { CCI_REG8(0x3803), 0x04 }, + { CCI_REG8(0x3804), 0x01 }, + { CCI_REG8(0x3805), 0x9b }, + { CCI_REG8(0x3806), 0x01 }, + { CCI_REG8(0x3807), 0x9b }, + { CCI_REG8(0x3808), 0x01 }, /* output width */ + { CCI_REG8(0x3809), 0x90 }, + { CCI_REG8(0x380a), 0x01 }, /* output height */ + { CCI_REG8(0x380b), 0x90 }, + { CCI_REG8(0x380c), 0x05 }, /* horizontal timing size */ + { CCI_REG8(0x380d), 0xf2 }, + { CCI_REG8(0x380e), 0x01 }, /* vertical timing size */ + { CCI_REG8(0x380f), 0xb6 }, + { CCI_REG8(0x3810), 0x00 }, + { CCI_REG8(0x3811), 0x04 }, + { CCI_REG8(0x3812), 0x00 }, + { CCI_REG8(0x3813), 0x04 }, + { CCI_REG8(0x3814), 0x11 }, + { CCI_REG8(0x3815), 0x11 }, + { CCI_REG8(0x3820), 0x00 }, + { CCI_REG8(0x3821), 0x00 }, + { CCI_REG8(0x382b), 0xfa }, + { CCI_REG8(0x382f), 0x04 }, + { CCI_REG8(0x3832), 0x00 }, + { CCI_REG8(0x3833), 0x05 }, + { CCI_REG8(0x3834), 0x00 }, + { CCI_REG8(0x3835), 0x05 }, + { CCI_REG8(0x3882), 0x04 }, + { CCI_REG8(0x3883), 0x00 }, + { CCI_REG8(0x38a4), 0x10 }, + { CCI_REG8(0x38a5), 0x00 }, + { CCI_REG8(0x38b1), 0x03 }, + { CCI_REG8(0x3b80), 0x00 }, + { CCI_REG8(0x3b81), 0xff }, + { CCI_REG8(0x3b82), 0x10 }, + { CCI_REG8(0x3b83), 0x00 }, + { CCI_REG8(0x3b84), 0x08 }, + { CCI_REG8(0x3b85), 0x00 }, + { CCI_REG8(0x3b86), 0x01 }, + { CCI_REG8(0x3b87), 0x00 }, + { CCI_REG8(0x3b88), 0x00 }, + { CCI_REG8(0x3b89), 0x00 }, + { CCI_REG8(0x3b8a), 0x00 }, + { CCI_REG8(0x3b8b), 0x05 }, + { CCI_REG8(0x3b8c), 0x00 }, + { CCI_REG8(0x3b8d), 0x00 }, + { CCI_REG8(0x3b8e), 0x01 }, + { CCI_REG8(0x3b8f), 0xb2 }, + { CCI_REG8(0x3b94), 0x05 }, + { CCI_REG8(0x3b95), 0xf2 }, + { CCI_REG8(0x3b96), 0xc0 }, + { CCI_REG8(0x4004), 0x04 }, + { CCI_REG8(0x404e), 0x01 }, + { CCI_REG8(0x4801), 0x0f }, + { CCI_REG8(0x4806), 0x0f }, + { CCI_REG8(0x4837), 0x43 }, + { CCI_REG8(0x5a08), 0x00 }, + { CCI_REG8(0x5a01), 0x00 }, + { CCI_REG8(0x5a03), 0x00 }, + { CCI_REG8(0x5a04), 0x10 }, + { CCI_REG8(0x5a05), 0xa0 }, + { CCI_REG8(0x5a06), 0x0c }, + { CCI_REG8(0x5a07), 0x78 }, +}; + +static const struct ov6211_mode supported_modes[] = { + { + .width = 400, + .height = 400, + .hts = 1522, + .vts = 438, + .bpp = 8, + .reg_list = { + .regs = ov6211_400x400_120fps_mode, + .num_regs = ARRAY_SIZE(ov6211_400x400_120fps_mode), + }, + }, +}; + +static int ov6211_set_test_pattern(struct ov6211 *ov6211, u32 pattern) +{ + u64 val = ov6211->pre_isp; + + if (pattern) + val |= OV6211_TEST_PATTERN_ENABLE; + else + val &= ~OV6211_TEST_PATTERN_ENABLE; + + return cci_write(ov6211->regmap, OV6211_REG_PRE_ISP, val, NULL); +} + +static int ov6211_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov6211 *ov6211 = container_of(ctrl->handler, struct ov6211, + ctrl_handler); + int ret; + + /* V4L2 controls are applied, when sensor is powered up for streaming */ + if (!pm_runtime_get_if_active(ov6211->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_ANALOGUE_GAIN: + ret = cci_write(ov6211->regmap, OV6211_REG_ANALOGUE_GAIN, + ctrl->val, NULL); + break; + case V4L2_CID_EXPOSURE: + ret = cci_write(ov6211->regmap, OV6211_REG_EXPOSURE, + ctrl->val << 4, NULL); + break; + case V4L2_CID_TEST_PATTERN: + ret = ov6211_set_test_pattern(ov6211, ctrl->val); + break; + default: + ret = -EINVAL; + break; + } + + pm_runtime_put(ov6211->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops ov6211_ctrl_ops = { + .s_ctrl = ov6211_set_ctrl, +}; + +static int ov6211_init_controls(struct ov6211 *ov6211) +{ + struct v4l2_ctrl_handler *ctrl_hdlr = &ov6211->ctrl_handler; + const struct ov6211_mode *mode = &supported_modes[0]; + struct v4l2_fwnode_device_properties props; + s64 exposure_max, pixel_rate, h_blank; + struct v4l2_ctrl *ctrl; + int ret; + + v4l2_ctrl_handler_init(ctrl_hdlr, 9); + + ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov6211_ctrl_ops, + V4L2_CID_LINK_FREQ, + ARRAY_SIZE(ov6211_link_freq_menu) - 1, + 0, ov6211_link_freq_menu); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + pixel_rate = ov6211_link_freq_menu[0] / mode->bpp; + v4l2_ctrl_new_std(ctrl_hdlr, &ov6211_ctrl_ops, V4L2_CID_PIXEL_RATE, + 0, pixel_rate, 1, pixel_rate); + + h_blank = mode->hts - mode->width; + ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &ov6211_ctrl_ops, V4L2_CID_HBLANK, + h_blank, h_blank, 1, h_blank); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &ov6211_ctrl_ops, V4L2_CID_VBLANK, + mode->vts - mode->height, + mode->vts - mode->height, 1, + mode->vts - mode->height); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + v4l2_ctrl_new_std(ctrl_hdlr, &ov6211_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, + OV6211_ANALOGUE_GAIN_MIN, OV6211_ANALOGUE_GAIN_MAX, + OV6211_ANALOGUE_GAIN_STEP, + OV6211_ANALOGUE_GAIN_DEFAULT); + + exposure_max = (mode->vts - OV6211_EXPOSURE_MAX_MARGIN); + v4l2_ctrl_new_std(ctrl_hdlr, &ov6211_ctrl_ops, + V4L2_CID_EXPOSURE, + OV6211_EXPOSURE_MIN, exposure_max, + OV6211_EXPOSURE_STEP, + OV6211_EXPOSURE_DEFAULT); + + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov6211_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov6211_test_pattern_menu) - 1, + 0, 0, ov6211_test_pattern_menu); + + if (ctrl_hdlr->error) + return ctrl_hdlr->error; + + ret = v4l2_fwnode_device_parse(ov6211->dev, &props); + if (ret) + goto error_free_hdlr; + + ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov6211_ctrl_ops, + &props); + if (ret) + goto error_free_hdlr; + + ov6211->sd.ctrl_handler = ctrl_hdlr; + + return 0; + +error_free_hdlr: + v4l2_ctrl_handler_free(ctrl_hdlr); + + return ret; +} + +static void ov6211_update_pad_format(const struct ov6211_mode *mode, + struct v4l2_mbus_framefmt *fmt) +{ + fmt->code = MEDIA_BUS_FMT_Y8_1X8; + fmt->width = mode->width; + fmt->height = mode->height; + fmt->field = V4L2_FIELD_NONE; + fmt->colorspace = V4L2_COLORSPACE_RAW; + fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; + fmt->xfer_func = V4L2_XFER_FUNC_NONE; +} + +static int ov6211_enable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + const struct ov6211_reg_list *reg_list = &supported_modes[0].reg_list; + struct ov6211 *ov6211 = to_ov6211(sd); + int ret; + + ret = pm_runtime_resume_and_get(ov6211->dev); + if (ret) + return ret; + + /* Skip a step of explicit entering into the standby mode */ + ret = cci_write(ov6211->regmap, OV6211_REG_SOFTWARE_RST, + OV6211_SOFTWARE_RST, NULL); + if (ret) { + dev_err(ov6211->dev, "failed to software reset: %d\n", ret); + goto error; + } + + ret = cci_multi_reg_write(ov6211->regmap, reg_list->regs, + reg_list->num_regs, NULL); + if (ret) { + dev_err(ov6211->dev, "failed to set mode: %d\n", ret); + goto error; + } + + ret = __v4l2_ctrl_handler_setup(ov6211->sd.ctrl_handler); + if (ret) + goto error; + + ret = cci_write(ov6211->regmap, OV6211_REG_MODE_SELECT, + OV6211_MODE_STREAMING, NULL); + if (ret) { + dev_err(ov6211->dev, "failed to start streaming: %d\n", ret); + goto error; + } + + return 0; + +error: + pm_runtime_put_autosuspend(ov6211->dev); + + return ret; +} + +static int ov6211_disable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + struct ov6211 *ov6211 = to_ov6211(sd); + int ret; + + ret = cci_write(ov6211->regmap, OV6211_REG_MODE_SELECT, + OV6211_MODE_STANDBY, NULL); + if (ret) + dev_err(ov6211->dev, "failed to stop streaming: %d\n", ret); + + pm_runtime_put_autosuspend(ov6211->dev); + + return ret; +} + +static int ov6211_set_pad_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *fmt) +{ + struct v4l2_mbus_framefmt *format; + const struct ov6211_mode *mode; + + format = v4l2_subdev_state_get_format(state, 0); + + mode = v4l2_find_nearest_size(supported_modes, + ARRAY_SIZE(supported_modes), + width, height, + fmt->format.width, + fmt->format.height); + + ov6211_update_pad_format(mode, &fmt->format); + *format = fmt->format; + + return 0; +} + +static int ov6211_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->index > 0) + return -EINVAL; + + code->code = MEDIA_BUS_FMT_Y8_1X8; + + return 0; +} + +static int ov6211_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (fse->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + if (fse->code != MEDIA_BUS_FMT_Y8_1X8) + return -EINVAL; + + fse->min_width = supported_modes[fse->index].width; + fse->max_width = fse->min_width; + fse->min_height = supported_modes[fse->index].height; + fse->max_height = fse->min_height; + + return 0; +} + +static int ov6211_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + struct v4l2_subdev_format fmt = { + .which = V4L2_SUBDEV_FORMAT_TRY, + .pad = 0, + .format = { + .code = MEDIA_BUS_FMT_Y8_1X8, + .width = supported_modes[0].width, + .height = supported_modes[0].height, + }, + }; + + ov6211_set_pad_format(sd, state, &fmt); + + return 0; +} + +static const struct v4l2_subdev_video_ops ov6211_video_ops = { + .s_stream = v4l2_subdev_s_stream_helper, +}; + +static const struct v4l2_subdev_pad_ops ov6211_pad_ops = { + .set_fmt = ov6211_set_pad_format, + .get_fmt = v4l2_subdev_get_fmt, + .enum_mbus_code = ov6211_enum_mbus_code, + .enum_frame_size = ov6211_enum_frame_size, + .enable_streams = ov6211_enable_streams, + .disable_streams = ov6211_disable_streams, +}; + +static const struct v4l2_subdev_ops ov6211_subdev_ops = { + .video = &ov6211_video_ops, + .pad = &ov6211_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops ov6211_internal_ops = { + .init_state = ov6211_init_state, +}; + +static const struct media_entity_operations ov6211_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static int ov6211_identify_sensor(struct ov6211 *ov6211) +{ + u64 val; + int ret; + + ret = cci_read(ov6211->regmap, OV6211_REG_CHIP_ID, &val, NULL); + if (ret) { + dev_err(ov6211->dev, "failed to read chip id: %d\n", ret); + return ret; + } + + if (val != OV6211_CHIP_ID) { + dev_err(ov6211->dev, "chip id mismatch: %x!=%llx\n", + OV6211_CHIP_ID, val); + return -ENODEV; + } + + ret = cci_read(ov6211->regmap, OV6211_REG_PRE_ISP, + &ov6211->pre_isp, NULL); + if (ret) + dev_err(ov6211->dev, "failed to read pre_isp: %d\n", ret); + + return ret; +} + +static int ov6211_check_hwcfg(struct ov6211 *ov6211) +{ + struct fwnode_handle *fwnode = dev_fwnode(ov6211->dev), *ep; + struct v4l2_fwnode_endpoint bus_cfg = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; + unsigned long freq_bitmap; + int ret; + + if (!fwnode) + return -ENODEV; + + ep = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (!ep) + return -EINVAL; + + ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); + fwnode_handle_put(ep); + if (ret) + return ret; + + ret = v4l2_link_freq_to_bitmap(ov6211->dev, bus_cfg.link_frequencies, + bus_cfg.nr_of_link_frequencies, + ov6211_link_freq_menu, + ARRAY_SIZE(ov6211_link_freq_menu), + &freq_bitmap); + + v4l2_fwnode_endpoint_free(&bus_cfg); + + return ret; +} + +static int ov6211_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov6211 *ov6211 = to_ov6211(sd); + int ret; + + ret = regulator_bulk_enable(OV6211_NUM_SUPPLIES, ov6211->supplies); + if (ret) + return ret; + + gpiod_set_value_cansleep(ov6211->reset_gpio, 0); + usleep_range(10 * USEC_PER_MSEC, 15 * USEC_PER_MSEC); + + ret = clk_prepare_enable(ov6211->xvclk); + if (ret) + goto reset_gpio; + + return 0; + +reset_gpio: + gpiod_set_value_cansleep(ov6211->reset_gpio, 1); + + regulator_bulk_disable(OV6211_NUM_SUPPLIES, ov6211->supplies); + + return ret; +} + +static int ov6211_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov6211 *ov6211 = to_ov6211(sd); + + clk_disable_unprepare(ov6211->xvclk); + + gpiod_set_value_cansleep(ov6211->reset_gpio, 1); + + regulator_bulk_disable(OV6211_NUM_SUPPLIES, ov6211->supplies); + + return 0; +} + +static int ov6211_probe(struct i2c_client *client) +{ + struct ov6211 *ov6211; + unsigned long freq; + unsigned int i; + int ret; + + ov6211 = devm_kzalloc(&client->dev, sizeof(*ov6211), GFP_KERNEL); + if (!ov6211) + return -ENOMEM; + + ov6211->dev = &client->dev; + + v4l2_i2c_subdev_init(&ov6211->sd, client, &ov6211_subdev_ops); + + ov6211->regmap = devm_cci_regmap_init_i2c(client, 16); + if (IS_ERR(ov6211->regmap)) + return dev_err_probe(ov6211->dev, PTR_ERR(ov6211->regmap), + "failed to init CCI\n"); + + ov6211->xvclk = devm_v4l2_sensor_clk_get(ov6211->dev, NULL); + if (IS_ERR(ov6211->xvclk)) + return dev_err_probe(ov6211->dev, PTR_ERR(ov6211->xvclk), + "failed to get XVCLK clock\n"); + + freq = clk_get_rate(ov6211->xvclk); + if (freq && freq != OV6211_MCLK_FREQ_24MHZ) + return dev_err_probe(ov6211->dev, -EINVAL, + "XVCLK clock frequency %lu is not supported\n", + freq); + + ret = ov6211_check_hwcfg(ov6211); + if (ret) + return dev_err_probe(ov6211->dev, ret, + "failed to check HW configuration\n"); + + ov6211->reset_gpio = devm_gpiod_get_optional(ov6211->dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(ov6211->reset_gpio)) + return dev_err_probe(ov6211->dev, PTR_ERR(ov6211->reset_gpio), + "cannot get reset GPIO\n"); + + for (i = 0; i < OV6211_NUM_SUPPLIES; i++) + ov6211->supplies[i].supply = ov6211_supply_names[i]; + + ret = devm_regulator_bulk_get(ov6211->dev, OV6211_NUM_SUPPLIES, + ov6211->supplies); + if (ret) + return dev_err_probe(ov6211->dev, ret, + "failed to get supply regulators\n"); + + /* The sensor must be powered on to read the CHIP_ID register */ + ret = ov6211_power_on(ov6211->dev); + if (ret) + return ret; + + ret = ov6211_identify_sensor(ov6211); + if (ret) { + dev_err_probe(ov6211->dev, ret, "failed to find sensor\n"); + goto power_off; + } + + ret = ov6211_init_controls(ov6211); + if (ret) { + dev_err_probe(ov6211->dev, ret, "failed to init controls\n"); + goto power_off; + } + + ov6211->sd.state_lock = ov6211->ctrl_handler.lock; + ov6211->sd.internal_ops = &ov6211_internal_ops; + ov6211->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + ov6211->sd.entity.ops = &ov6211_subdev_entity_ops; + ov6211->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + ov6211->pad.flags = MEDIA_PAD_FL_SOURCE; + + ret = media_entity_pads_init(&ov6211->sd.entity, 1, &ov6211->pad); + if (ret) { + dev_err_probe(ov6211->dev, ret, + "failed to init media entity pads\n"); + goto v4l2_ctrl_handler_free; + } + + ret = v4l2_subdev_init_finalize(&ov6211->sd); + if (ret < 0) { + dev_err_probe(ov6211->dev, ret, + "failed to init media entity pads\n"); + goto media_entity_cleanup; + } + + pm_runtime_set_active(ov6211->dev); + pm_runtime_enable(ov6211->dev); + + ret = v4l2_async_register_subdev_sensor(&ov6211->sd); + if (ret < 0) { + dev_err_probe(ov6211->dev, ret, + "failed to register V4L2 subdev\n"); + goto subdev_cleanup; + } + + /* Enable runtime PM and turn off the device */ + pm_runtime_idle(ov6211->dev); + pm_runtime_set_autosuspend_delay(ov6211->dev, 1000); + pm_runtime_use_autosuspend(ov6211->dev); + + return 0; + +subdev_cleanup: + v4l2_subdev_cleanup(&ov6211->sd); + pm_runtime_disable(ov6211->dev); + pm_runtime_set_suspended(ov6211->dev); + +media_entity_cleanup: + media_entity_cleanup(&ov6211->sd.entity); + +v4l2_ctrl_handler_free: + v4l2_ctrl_handler_free(ov6211->sd.ctrl_handler); + +power_off: + ov6211_power_off(ov6211->dev); + + return ret; +} + +static void ov6211_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov6211 *ov6211 = to_ov6211(sd); + + v4l2_async_unregister_subdev(sd); + v4l2_subdev_cleanup(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(sd->ctrl_handler); + pm_runtime_disable(ov6211->dev); + + if (!pm_runtime_status_suspended(ov6211->dev)) { + ov6211_power_off(ov6211->dev); + pm_runtime_set_suspended(ov6211->dev); + } +} + +static const struct dev_pm_ops ov6211_pm_ops = { + SET_RUNTIME_PM_OPS(ov6211_power_off, ov6211_power_on, NULL) +}; + +static const struct of_device_id ov6211_of_match[] = { + { .compatible = "ovti,ov6211" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ov6211_of_match); + +static struct i2c_driver ov6211_i2c_driver = { + .driver = { + .name = "ov6211", + .pm = &ov6211_pm_ops, + .of_match_table = ov6211_of_match, + }, + .probe = ov6211_probe, + .remove = ov6211_remove, +}; + +module_i2c_driver(ov6211_i2c_driver); + +MODULE_AUTHOR("Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>"); +MODULE_DESCRIPTION("OmniVision OV6211 sensor driver"); +MODULE_LICENSE("GPL"); |