diff options
Diffstat (limited to 'drivers/media/i2c/ov2680.c')
| -rw-r--r-- | drivers/media/i2c/ov2680.c | 1286 |
1 files changed, 1286 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c new file mode 100644 index 000000000..72bab0ff8 --- /dev/null +++ b/drivers/media/i2c/ov2680.c @@ -0,0 +1,1286 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Omnivision OV2680 CMOS Image Sensor driver + * + * Copyright (C) 2018 Linaro Ltd + * + * Based on OV5640 Sensor Driver + * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2014-2017 Mentor Graphics Inc. + * + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#include <media/v4l2-cci.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-fwnode.h> +#include <media/v4l2-subdev.h> + +#define OV2680_CHIP_ID 0x2680 + +#define OV2680_REG_STREAM_CTRL CCI_REG8(0x0100) +#define OV2680_REG_SOFT_RESET CCI_REG8(0x0103) + +#define OV2680_REG_CHIP_ID CCI_REG16(0x300a) +#define OV2680_REG_SC_CMMN_SUB_ID CCI_REG8(0x302a) +#define OV2680_REG_PLL_MULTIPLIER CCI_REG16(0x3081) + +#define OV2680_REG_EXPOSURE_PK CCI_REG24(0x3500) +#define OV2680_REG_R_MANUAL CCI_REG8(0x3503) +#define OV2680_REG_GAIN_PK CCI_REG16(0x350a) + +#define OV2680_REG_SENSOR_CTRL_0A CCI_REG8(0x370a) + +#define OV2680_REG_HORIZONTAL_START CCI_REG16(0x3800) +#define OV2680_REG_VERTICAL_START CCI_REG16(0x3802) +#define OV2680_REG_HORIZONTAL_END CCI_REG16(0x3804) +#define OV2680_REG_VERTICAL_END CCI_REG16(0x3806) +#define OV2680_REG_HORIZONTAL_OUTPUT_SIZE CCI_REG16(0x3808) +#define OV2680_REG_VERTICAL_OUTPUT_SIZE CCI_REG16(0x380a) +#define OV2680_REG_TIMING_HTS CCI_REG16(0x380c) +#define OV2680_REG_TIMING_VTS CCI_REG16(0x380e) +#define OV2680_REG_ISP_X_WIN CCI_REG16(0x3810) +#define OV2680_REG_ISP_Y_WIN CCI_REG16(0x3812) +#define OV2680_REG_X_INC CCI_REG8(0x3814) +#define OV2680_REG_Y_INC CCI_REG8(0x3815) +#define OV2680_REG_FORMAT1 CCI_REG8(0x3820) +#define OV2680_REG_FORMAT2 CCI_REG8(0x3821) + +#define OV2680_REG_ISP_CTRL00 CCI_REG8(0x5080) + +#define OV2680_REG_X_WIN CCI_REG16(0x5704) +#define OV2680_REG_Y_WIN CCI_REG16(0x5706) + +#define OV2680_FRAME_RATE 30 + +#define OV2680_NATIVE_WIDTH 1616 +#define OV2680_NATIVE_HEIGHT 1216 +#define OV2680_NATIVE_START_LEFT 0 +#define OV2680_NATIVE_START_TOP 0 +#define OV2680_ACTIVE_WIDTH 1600 +#define OV2680_ACTIVE_HEIGHT 1200 +#define OV2680_ACTIVE_START_LEFT 8 +#define OV2680_ACTIVE_START_TOP 8 +#define OV2680_MIN_CROP_WIDTH 2 +#define OV2680_MIN_CROP_HEIGHT 2 + +/* Fixed pre-div of 1/2 */ +#define OV2680_PLL_PREDIV0 2 + +/* Pre-div configurable through reg 0x3080, left at its default of 0x02 : 1/2 */ +#define OV2680_PLL_PREDIV 2 + +/* 66MHz pixel clock: 66MHz / 1704 * 1294 = 30fps */ +#define OV2680_PIXELS_PER_LINE 1704 +#define OV2680_LINES_PER_FRAME 1294 + +/* If possible send 16 extra rows / lines to the ISP as padding */ +#define OV2680_END_MARGIN 16 + +/* Max exposure time is VTS - 8 */ +#define OV2680_INTEGRATION_TIME_MARGIN 8 + +#define OV2680_DEFAULT_WIDTH 800 +#define OV2680_DEFAULT_HEIGHT 600 + +/* For enum_frame_size() full-size + binned-/quarter-size */ +#define OV2680_FRAME_SIZES 2 + +static const char * const ov2680_supply_name[] = { + "DOVDD", + "DVDD", + "AVDD", +}; + +#define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name) + +enum { + OV2680_19_2_MHZ, + OV2680_24_MHZ, +}; + +static const unsigned long ov2680_xvclk_freqs[] = { + [OV2680_19_2_MHZ] = 19200000, + [OV2680_24_MHZ] = 24000000, +}; + +static const u8 ov2680_pll_multipliers[] = { + [OV2680_19_2_MHZ] = 69, + [OV2680_24_MHZ] = 55, +}; + +struct ov2680_ctrls { + struct v4l2_ctrl_handler handler; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *gain; + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; + struct v4l2_ctrl *test_pattern; + struct v4l2_ctrl *link_freq; + struct v4l2_ctrl *pixel_rate; +}; + +struct ov2680_mode { + struct v4l2_rect crop; + struct v4l2_mbus_framefmt fmt; + struct v4l2_fract frame_interval; + bool binning; + u16 h_start; + u16 v_start; + u16 h_end; + u16 v_end; + u16 h_output_size; + u16 v_output_size; + u16 hts; + u16 vts; +}; + +struct ov2680_dev { + struct device *dev; + struct regmap *regmap; + struct v4l2_subdev sd; + + struct media_pad pad; + struct clk *xvclk; + u32 xvclk_freq; + u8 pll_mult; + s64 link_freq[1]; + u64 pixel_rate; + struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES]; + + struct gpio_desc *pwdn_gpio; + struct mutex lock; /* protect members */ + + bool is_streaming; + + struct ov2680_ctrls ctrls; + struct ov2680_mode mode; +}; + +static const struct v4l2_rect ov2680_default_crop = { + .left = OV2680_ACTIVE_START_LEFT, + .top = OV2680_ACTIVE_START_TOP, + .width = OV2680_ACTIVE_WIDTH, + .height = OV2680_ACTIVE_HEIGHT, +}; + +static const char * const test_pattern_menu[] = { + "Disabled", + "Color Bars", + "Random Data", + "Square", + "Black Image", +}; + +static const int ov2680_hv_flip_bayer_order[] = { + MEDIA_BUS_FMT_SBGGR10_1X10, + MEDIA_BUS_FMT_SGRBG10_1X10, + MEDIA_BUS_FMT_SGBRG10_1X10, + MEDIA_BUS_FMT_SRGGB10_1X10, +}; + +static const struct reg_sequence ov2680_global_setting[] = { + /* MIPI PHY, 0x10 -> 0x1c enable bp_c_hs_en_lat and bp_d_hs_en_lat */ + {0x3016, 0x1c}, + + /* R MANUAL set exposure and gain to manual (hw does not do auto) */ + {0x3503, 0x03}, + + /* Analog control register tweaks */ + {0x3603, 0x39}, /* Reset value 0x99 */ + {0x3604, 0x24}, /* Reset value 0x74 */ + {0x3621, 0x37}, /* Reset value 0x44 */ + + /* Sensor control register tweaks */ + {0x3701, 0x64}, /* Reset value 0x61 */ + {0x3705, 0x3c}, /* Reset value 0x21 */ + {0x370c, 0x50}, /* Reset value 0x10 */ + {0x370d, 0xc0}, /* Reset value 0x00 */ + {0x3718, 0x88}, /* Reset value 0x80 */ + + /* PSRAM tweaks */ + {0x3781, 0x80}, /* Reset value 0x00 */ + {0x3784, 0x0c}, /* Reset value 0x00, based on OV2680_R1A_AM10.ovt */ + {0x3789, 0x60}, /* Reset value 0x50 */ + + /* BLC CTRL00 0x01 -> 0x81 set avg_weight to 8 */ + {0x4000, 0x81}, + + /* Set black level compensation range to 0 - 3 (default 0 - 11) */ + {0x4008, 0x00}, + {0x4009, 0x03}, + + /* VFIFO R2 0x00 -> 0x02 set Frame reset enable */ + {0x4602, 0x02}, + + /* MIPI ctrl CLK PREPARE MIN change from 0x26 (38) -> 0x36 (54) */ + {0x481f, 0x36}, + + /* MIPI ctrl CLK LPX P MIN change from 0x32 (50) -> 0x36 (54) */ + {0x4825, 0x36}, + + /* R ISP CTRL2 0x20 -> 0x30, set sof_sel bit */ + {0x5002, 0x30}, + + /* + * Window CONTROL 0x00 -> 0x01, enable manual window control, + * this is necessary for full size flip and mirror support. + */ + {0x5708, 0x01}, + + /* + * DPC CTRL0 0x14 -> 0x3e, set enable_tail, enable_3x3_cluster + * and enable_general_tail bits based OV2680_R1A_AM10.ovt. + */ + {0x5780, 0x3e}, + + /* DPC MORE CONNECTION CASE THRE 0x0c (12) -> 0x02 (2) */ + {0x5788, 0x02}, + + /* DPC GAIN LIST1 0x0f (15) -> 0x08 (8) */ + {0x578e, 0x08}, + + /* DPC GAIN LIST2 0x3f (63) -> 0x0c (12) */ + {0x578f, 0x0c}, + + /* DPC THRE RATIO 0x04 (4) -> 0x00 (0) */ + {0x5792, 0x00}, +}; + +static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) +{ + return container_of(sd, struct ov2680_dev, sd); +} + +static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) +{ + return &container_of(ctrl->handler, struct ov2680_dev, + ctrls.handler)->sd; +} + +static void ov2680_power_up(struct ov2680_dev *sensor) +{ + if (!sensor->pwdn_gpio) + return; + + gpiod_set_value(sensor->pwdn_gpio, 0); + usleep_range(5000, 10000); +} + +static void ov2680_power_down(struct ov2680_dev *sensor) +{ + if (!sensor->pwdn_gpio) + return; + + gpiod_set_value(sensor->pwdn_gpio, 1); + usleep_range(5000, 10000); +} + +static void ov2680_set_bayer_order(struct ov2680_dev *sensor, + struct v4l2_mbus_framefmt *fmt) +{ + int hv_flip = 0; + + if (sensor->ctrls.vflip && sensor->ctrls.vflip->val) + hv_flip += 1; + + if (sensor->ctrls.hflip && sensor->ctrls.hflip->val) + hv_flip += 2; + + fmt->code = ov2680_hv_flip_bayer_order[hv_flip]; +} + +static struct v4l2_mbus_framefmt * +__ov2680_get_pad_format(struct ov2680_dev *sensor, + struct v4l2_subdev_state *state, + unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + if (which == V4L2_SUBDEV_FORMAT_TRY) + return v4l2_subdev_get_try_format(&sensor->sd, state, pad); + + return &sensor->mode.fmt; +} + +static struct v4l2_rect * +__ov2680_get_pad_crop(struct ov2680_dev *sensor, + struct v4l2_subdev_state *state, + unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + if (which == V4L2_SUBDEV_FORMAT_TRY) + return v4l2_subdev_get_try_crop(&sensor->sd, state, pad); + + return &sensor->mode.crop; +} + +static void ov2680_fill_format(struct ov2680_dev *sensor, + struct v4l2_mbus_framefmt *fmt, + unsigned int width, unsigned int height) +{ + memset(fmt, 0, sizeof(*fmt)); + fmt->width = width; + fmt->height = height; + fmt->field = V4L2_FIELD_NONE; + fmt->colorspace = V4L2_COLORSPACE_SRGB; + ov2680_set_bayer_order(sensor, fmt); +} + +static void ov2680_calc_mode(struct ov2680_dev *sensor) +{ + int width = sensor->mode.fmt.width; + int height = sensor->mode.fmt.height; + int orig_width = width; + int orig_height = height; + + if (width <= (sensor->mode.crop.width / 2) && + height <= (sensor->mode.crop.height / 2)) { + sensor->mode.binning = true; + width *= 2; + height *= 2; + } else { + sensor->mode.binning = false; + } + + sensor->mode.h_start = (sensor->mode.crop.left + + (sensor->mode.crop.width - width) / 2) & ~1; + sensor->mode.v_start = (sensor->mode.crop.top + + (sensor->mode.crop.height - height) / 2) & ~1; + sensor->mode.h_end = + min(sensor->mode.h_start + width + OV2680_END_MARGIN - 1, + OV2680_NATIVE_WIDTH - 1); + sensor->mode.v_end = + min(sensor->mode.v_start + height + OV2680_END_MARGIN - 1, + OV2680_NATIVE_HEIGHT - 1); + sensor->mode.h_output_size = orig_width; + sensor->mode.v_output_size = orig_height; + sensor->mode.hts = OV2680_PIXELS_PER_LINE; + sensor->mode.vts = OV2680_LINES_PER_FRAME; +} + +static int ov2680_set_mode(struct ov2680_dev *sensor) +{ + u8 sensor_ctrl_0a, inc, fmt1, fmt2; + int ret = 0; + + if (sensor->mode.binning) { + sensor_ctrl_0a = 0x23; + inc = 0x31; + fmt1 = 0xc2; + fmt2 = 0x01; + } else { + sensor_ctrl_0a = 0x21; + inc = 0x11; + fmt1 = 0xc0; + fmt2 = 0x00; + } + + cci_write(sensor->regmap, OV2680_REG_SENSOR_CTRL_0A, + sensor_ctrl_0a, &ret); + cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_START, + sensor->mode.h_start, &ret); + cci_write(sensor->regmap, OV2680_REG_VERTICAL_START, + sensor->mode.v_start, &ret); + cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_END, + sensor->mode.h_end, &ret); + cci_write(sensor->regmap, OV2680_REG_VERTICAL_END, + sensor->mode.v_end, &ret); + cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_OUTPUT_SIZE, + sensor->mode.h_output_size, &ret); + cci_write(sensor->regmap, OV2680_REG_VERTICAL_OUTPUT_SIZE, + sensor->mode.v_output_size, &ret); + cci_write(sensor->regmap, OV2680_REG_TIMING_HTS, + sensor->mode.hts, &ret); + cci_write(sensor->regmap, OV2680_REG_TIMING_VTS, + sensor->mode.vts, &ret); + cci_write(sensor->regmap, OV2680_REG_ISP_X_WIN, 0, &ret); + cci_write(sensor->regmap, OV2680_REG_ISP_Y_WIN, 0, &ret); + cci_write(sensor->regmap, OV2680_REG_X_INC, inc, &ret); + cci_write(sensor->regmap, OV2680_REG_Y_INC, inc, &ret); + cci_write(sensor->regmap, OV2680_REG_X_WIN, + sensor->mode.h_output_size, &ret); + cci_write(sensor->regmap, OV2680_REG_Y_WIN, + sensor->mode.v_output_size, &ret); + cci_write(sensor->regmap, OV2680_REG_FORMAT1, fmt1, &ret); + cci_write(sensor->regmap, OV2680_REG_FORMAT2, fmt2, &ret); + + return ret; +} + +static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val) +{ + int ret; + + if (sensor->is_streaming) + return -EBUSY; + + ret = cci_update_bits(sensor->regmap, OV2680_REG_FORMAT1, + BIT(2), val ? BIT(2) : 0, NULL); + if (ret < 0) + return ret; + + ov2680_set_bayer_order(sensor, &sensor->mode.fmt); + return 0; +} + +static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val) +{ + int ret; + + if (sensor->is_streaming) + return -EBUSY; + + ret = cci_update_bits(sensor->regmap, OV2680_REG_FORMAT2, + BIT(2), val ? BIT(2) : 0, NULL); + if (ret < 0) + return ret; + + ov2680_set_bayer_order(sensor, &sensor->mode.fmt); + return 0; +} + +static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) +{ + int ret = 0; + + if (!value) + return cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00, + BIT(7), 0, NULL); + + cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00, + 0x03, value - 1, &ret); + cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00, + BIT(7), BIT(7), &ret); + + return ret; +} + +static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain) +{ + return cci_write(sensor->regmap, OV2680_REG_GAIN_PK, gain, NULL); +} + +static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp) +{ + return cci_write(sensor->regmap, OV2680_REG_EXPOSURE_PK, exp << 4, + NULL); +} + +static int ov2680_stream_enable(struct ov2680_dev *sensor) +{ + int ret; + + ret = cci_write(sensor->regmap, OV2680_REG_PLL_MULTIPLIER, + sensor->pll_mult, NULL); + if (ret < 0) + return ret; + + ret = regmap_multi_reg_write(sensor->regmap, + ov2680_global_setting, + ARRAY_SIZE(ov2680_global_setting)); + if (ret < 0) + return ret; + + ret = ov2680_set_mode(sensor); + if (ret < 0) + return ret; + + /* Restore value of all ctrls */ + ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler); + if (ret < 0) + return ret; + + return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 1, NULL); +} + +static int ov2680_stream_disable(struct ov2680_dev *sensor) +{ + return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 0, NULL); +} + +static int ov2680_power_off(struct ov2680_dev *sensor) +{ + clk_disable_unprepare(sensor->xvclk); + ov2680_power_down(sensor); + regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); + return 0; +} + +static int ov2680_power_on(struct ov2680_dev *sensor) +{ + int ret; + + ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies); + if (ret < 0) { + dev_err(sensor->dev, "failed to enable regulators: %d\n", ret); + return ret; + } + + if (!sensor->pwdn_gpio) { + ret = cci_write(sensor->regmap, OV2680_REG_SOFT_RESET, 0x01, + NULL); + if (ret != 0) { + dev_err(sensor->dev, "sensor soft reset failed\n"); + goto err_disable_regulators; + } + usleep_range(1000, 2000); + } else { + ov2680_power_down(sensor); + ov2680_power_up(sensor); + } + + ret = clk_prepare_enable(sensor->xvclk); + if (ret < 0) + goto err_disable_regulators; + + return 0; + +err_disable_regulators: + regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); + return ret; +} + +static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *fi) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + mutex_lock(&sensor->lock); + fi->interval = sensor->mode.frame_interval; + mutex_unlock(&sensor->lock); + + return 0; +} + +static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int ret = 0; + + mutex_lock(&sensor->lock); + + if (sensor->is_streaming == !!enable) + goto unlock; + + if (enable) { + ret = pm_runtime_resume_and_get(sensor->sd.dev); + if (ret < 0) + goto unlock; + + ret = ov2680_stream_enable(sensor); + if (ret < 0) { + pm_runtime_put(sensor->sd.dev); + goto unlock; + } + } else { + ret = ov2680_stream_disable(sensor); + pm_runtime_put(sensor->sd.dev); + } + + sensor->is_streaming = !!enable; + +unlock: + mutex_unlock(&sensor->lock); + + return ret; +} + +static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + if (code->index != 0) + return -EINVAL; + + code->code = sensor->mode.fmt.code; + + return 0; +} + +static int ov2680_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *format) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + struct v4l2_mbus_framefmt *fmt; + + fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad, + format->which); + + mutex_lock(&sensor->lock); + format->format = *fmt; + mutex_unlock(&sensor->lock); + + return 0; +} + +static int ov2680_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *format) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + struct v4l2_mbus_framefmt *try_fmt; + const struct v4l2_rect *crop; + unsigned int width, height; + int ret = 0; + + crop = __ov2680_get_pad_crop(sensor, sd_state, format->pad, + format->which); + + /* Limit set_fmt max size to crop width / height */ + width = clamp_val(ALIGN(format->format.width, 2), + OV2680_MIN_CROP_WIDTH, crop->width); + height = clamp_val(ALIGN(format->format.height, 2), + OV2680_MIN_CROP_HEIGHT, crop->height); + + ov2680_fill_format(sensor, &format->format, width, height); + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { + try_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0); + *try_fmt = format->format; + return 0; + } + + mutex_lock(&sensor->lock); + + if (sensor->is_streaming) { + ret = -EBUSY; + goto unlock; + } + + sensor->mode.fmt = format->format; + ov2680_calc_mode(sensor); + +unlock: + mutex_unlock(&sensor->lock); + + return ret; +} + +static int ov2680_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + switch (sel->target) { + case V4L2_SEL_TGT_CROP: + mutex_lock(&sensor->lock); + sel->r = *__ov2680_get_pad_crop(sensor, state, sel->pad, + sel->which); + mutex_unlock(&sensor->lock); + break; + case V4L2_SEL_TGT_NATIVE_SIZE: + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.top = 0; + sel->r.left = 0; + sel->r.width = OV2680_NATIVE_WIDTH; + sel->r.height = OV2680_NATIVE_HEIGHT; + break; + case V4L2_SEL_TGT_CROP_DEFAULT: + sel->r = ov2680_default_crop; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int ov2680_set_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + struct v4l2_mbus_framefmt *format; + struct v4l2_rect *crop; + struct v4l2_rect rect; + + if (sel->target != V4L2_SEL_TGT_CROP) + return -EINVAL; + + /* + * Clamp the boundaries of the crop rectangle to the size of the sensor + * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't + * disrupted. + */ + rect.left = clamp_val(ALIGN(sel->r.left, 2), + OV2680_NATIVE_START_LEFT, OV2680_NATIVE_WIDTH); + rect.top = clamp_val(ALIGN(sel->r.top, 2), + OV2680_NATIVE_START_TOP, OV2680_NATIVE_HEIGHT); + rect.width = clamp_val(ALIGN(sel->r.width, 2), + OV2680_MIN_CROP_WIDTH, OV2680_NATIVE_WIDTH); + rect.height = clamp_val(ALIGN(sel->r.height, 2), + OV2680_MIN_CROP_HEIGHT, OV2680_NATIVE_HEIGHT); + + /* Make sure the crop rectangle isn't outside the bounds of the array */ + rect.width = min_t(unsigned int, rect.width, + OV2680_NATIVE_WIDTH - rect.left); + rect.height = min_t(unsigned int, rect.height, + OV2680_NATIVE_HEIGHT - rect.top); + + crop = __ov2680_get_pad_crop(sensor, state, sel->pad, sel->which); + + mutex_lock(&sensor->lock); + if (rect.width != crop->width || rect.height != crop->height) { + /* + * Reset the output image size if the crop rectangle size has + * been modified. + */ + format = __ov2680_get_pad_format(sensor, state, sel->pad, + sel->which); + format->width = rect.width; + format->height = rect.height; + } + + *crop = rect; + mutex_unlock(&sensor->lock); + + sel->r = rect; + + return 0; +} + +static int ov2680_init_cfg(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + sd_state->pads[0].try_crop = ov2680_default_crop; + + ov2680_fill_format(sensor, &sd_state->pads[0].try_fmt, + OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT); + return 0; +} + +static int ov2680_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + struct v4l2_rect *crop; + + if (fse->index >= OV2680_FRAME_SIZES) + return -EINVAL; + + crop = __ov2680_get_pad_crop(sensor, sd_state, fse->pad, fse->which); + if (!crop) + return -EINVAL; + + fse->min_width = crop->width / (fse->index + 1); + fse->min_height = crop->height / (fse->index + 1); + fse->max_width = fse->min_width; + fse->max_height = fse->min_height; + + return 0; +} + +static bool ov2680_valid_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_interval_enum *fie) +{ + struct v4l2_subdev_frame_size_enum fse = { + .pad = fie->pad, + .which = fie->which, + }; + int i; + + for (i = 0; i < OV2680_FRAME_SIZES; i++) { + fse.index = i; + + if (ov2680_enum_frame_size(sd, sd_state, &fse)) + return false; + + if (fie->width == fse.min_width && + fie->height == fse.min_height) + return true; + } + + return false; +} + +static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_interval_enum *fie) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + /* Only 1 framerate */ + if (fie->index || !ov2680_valid_frame_size(sd, sd_state, fie)) + return -EINVAL; + + fie->interval = sensor->mode.frame_interval; + + return 0; +} + +static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct v4l2_subdev *sd = ctrl_to_sd(ctrl); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int ret; + + /* Only apply changes to the controls if the device is powered up */ + if (!pm_runtime_get_if_in_use(sensor->sd.dev)) { + ov2680_set_bayer_order(sensor, &sensor->mode.fmt); + return 0; + } + + switch (ctrl->id) { + case V4L2_CID_ANALOGUE_GAIN: + ret = ov2680_gain_set(sensor, ctrl->val); + break; + case V4L2_CID_EXPOSURE: + ret = ov2680_exposure_set(sensor, ctrl->val); + break; + case V4L2_CID_VFLIP: + ret = ov2680_set_vflip(sensor, ctrl->val); + break; + case V4L2_CID_HFLIP: + ret = ov2680_set_hflip(sensor, ctrl->val); + break; + case V4L2_CID_TEST_PATTERN: + ret = ov2680_test_pattern_set(sensor, ctrl->val); + break; + default: + ret = -EINVAL; + break; + } + + pm_runtime_put(sensor->sd.dev); + return ret; +} + +static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { + .s_ctrl = ov2680_s_ctrl, +}; + +static const struct v4l2_subdev_video_ops ov2680_video_ops = { + .g_frame_interval = ov2680_s_g_frame_interval, + .s_frame_interval = ov2680_s_g_frame_interval, + .s_stream = ov2680_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { + .init_cfg = ov2680_init_cfg, + .enum_mbus_code = ov2680_enum_mbus_code, + .enum_frame_size = ov2680_enum_frame_size, + .enum_frame_interval = ov2680_enum_frame_interval, + .get_fmt = ov2680_get_fmt, + .set_fmt = ov2680_set_fmt, + .get_selection = ov2680_get_selection, + .set_selection = ov2680_set_selection, +}; + +static const struct v4l2_subdev_ops ov2680_subdev_ops = { + .video = &ov2680_video_ops, + .pad = &ov2680_pad_ops, +}; + +static int ov2680_mode_init(struct ov2680_dev *sensor) +{ + /* set initial mode */ + sensor->mode.crop = ov2680_default_crop; + ov2680_fill_format(sensor, &sensor->mode.fmt, + OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT); + ov2680_calc_mode(sensor); + + sensor->mode.frame_interval.denominator = OV2680_FRAME_RATE; + sensor->mode.frame_interval.numerator = 1; + + return 0; +} + +static int ov2680_v4l2_register(struct ov2680_dev *sensor) +{ + struct i2c_client *client = to_i2c_client(sensor->dev); + const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; + struct ov2680_ctrls *ctrls = &sensor->ctrls; + struct v4l2_ctrl_handler *hdl = &ctrls->handler; + int exp_max = OV2680_LINES_PER_FRAME - OV2680_INTEGRATION_TIME_MARGIN; + int ret = 0; + + v4l2_i2c_subdev_init(&sensor->sd, client, &ov2680_subdev_ops); + + sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; + sensor->pad.flags = MEDIA_PAD_FL_SOURCE; + sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + + ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); + if (ret < 0) + return ret; + + v4l2_ctrl_handler_init(hdl, 5); + + hdl->lock = &sensor->lock; + + ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); + ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); + + ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, + &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(test_pattern_menu) - 1, + 0, 0, test_pattern_menu); + + ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, + 0, exp_max, 1, exp_max); + + ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN, + 0, 1023, 1, 250); + + ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ, + 0, 0, sensor->link_freq); + ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_PIXEL_RATE, + 0, sensor->pixel_rate, + 1, sensor->pixel_rate); + + if (hdl->error) { + ret = hdl->error; + goto cleanup_entity; + } + + ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; + ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; + ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + sensor->sd.ctrl_handler = hdl; + + ret = v4l2_async_register_subdev(&sensor->sd); + if (ret < 0) + goto cleanup_entity; + + return 0; + +cleanup_entity: + media_entity_cleanup(&sensor->sd.entity); + v4l2_ctrl_handler_free(hdl); + + return ret; +} + +static int ov2680_get_regulators(struct ov2680_dev *sensor) +{ + int i; + + for (i = 0; i < OV2680_NUM_SUPPLIES; i++) + sensor->supplies[i].supply = ov2680_supply_name[i]; + + return devm_regulator_bulk_get(sensor->dev, + OV2680_NUM_SUPPLIES, sensor->supplies); +} + +static int ov2680_check_id(struct ov2680_dev *sensor) +{ + u64 chip_id, rev; + int ret = 0; + + cci_read(sensor->regmap, OV2680_REG_CHIP_ID, &chip_id, &ret); + cci_read(sensor->regmap, OV2680_REG_SC_CMMN_SUB_ID, &rev, &ret); + if (ret < 0) { + dev_err(sensor->dev, "failed to read chip id\n"); + return ret; + } + + if (chip_id != OV2680_CHIP_ID) { + dev_err(sensor->dev, "chip id: 0x%04llx does not match expected 0x%04x\n", + chip_id, OV2680_CHIP_ID); + return -ENODEV; + } + + dev_info(sensor->dev, "sensor_revision id = 0x%llx, rev= %lld\n", + chip_id, rev & 0x0f); + + return 0; +} + +static int ov2680_parse_dt(struct ov2680_dev *sensor) +{ + struct v4l2_fwnode_endpoint bus_cfg = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; + struct device *dev = sensor->dev; + struct fwnode_handle *ep_fwnode; + struct gpio_desc *gpio; + unsigned int rate = 0; + int i, ret; + + /* + * Sometimes the fwnode graph is initialized by the bridge driver. + * Bridge drivers doing this may also add GPIO mappings, wait for this. + */ + ep_fwnode = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); + if (!ep_fwnode) + return dev_err_probe(dev, -EPROBE_DEFER, + "waiting for fwnode graph endpoint\n"); + + ret = v4l2_fwnode_endpoint_alloc_parse(ep_fwnode, &bus_cfg); + fwnode_handle_put(ep_fwnode); + if (ret) + return ret; + + /* + * The pin we want is named XSHUTDN in the datasheet. Linux sensor + * drivers have standardized on using "powerdown" as con-id name + * for powerdown or shutdown pins. Older DTB files use "reset", + * so fallback to that if there is no "powerdown" pin. + */ + gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); + if (!gpio) + gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + + ret = PTR_ERR_OR_ZERO(gpio); + if (ret < 0) { + dev_dbg(dev, "error while getting reset gpio: %d\n", ret); + goto out_free_bus_cfg; + } + + sensor->pwdn_gpio = gpio; + + sensor->xvclk = devm_clk_get_optional(dev, "xvclk"); + if (IS_ERR(sensor->xvclk)) { + ret = dev_err_probe(dev, PTR_ERR(sensor->xvclk), + "xvclk clock missing or invalid\n"); + goto out_free_bus_cfg; + } + + /* + * We could have either a 24MHz or 19.2MHz clock rate from either DT or + * ACPI... but we also need to support the weird IPU3 case which will + * have an external clock AND a clock-frequency property. Check for the + * clock-frequency property and if found, set that rate if we managed + * to acquire a clock. This should cover the ACPI case. If the system + * uses devicetree then the configured rate should already be set, so + * we can just read it. + */ + ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", + &rate); + if (ret && !sensor->xvclk) { + dev_err_probe(dev, ret, "invalid clock config\n"); + goto out_free_bus_cfg; + } + + if (!ret && sensor->xvclk) { + ret = clk_set_rate(sensor->xvclk, rate); + if (ret) { + dev_err_probe(dev, ret, "failed to set clock rate\n"); + goto out_free_bus_cfg; + } + } + + sensor->xvclk_freq = rate ?: clk_get_rate(sensor->xvclk); + + for (i = 0; i < ARRAY_SIZE(ov2680_xvclk_freqs); i++) { + if (sensor->xvclk_freq == ov2680_xvclk_freqs[i]) + break; + } + + if (i == ARRAY_SIZE(ov2680_xvclk_freqs)) { + ret = dev_err_probe(dev, -EINVAL, + "unsupported xvclk frequency %d Hz\n", + sensor->xvclk_freq); + goto out_free_bus_cfg; + } + + sensor->pll_mult = ov2680_pll_multipliers[i]; + + sensor->link_freq[0] = sensor->xvclk_freq / OV2680_PLL_PREDIV0 / + OV2680_PLL_PREDIV * sensor->pll_mult; + + /* CSI-2 is double data rate, bus-format is 10 bpp */ + sensor->pixel_rate = sensor->link_freq[0] * 2; + do_div(sensor->pixel_rate, 10); + + /* Verify bus cfg */ + if (bus_cfg.bus.mipi_csi2.num_data_lanes != 1) { + ret = dev_err_probe(dev, -EINVAL, + "only a 1-lane CSI2 config is supported"); + goto out_free_bus_cfg; + } + + for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) + if (bus_cfg.link_frequencies[i] == sensor->link_freq[0]) + break; + + if (bus_cfg.nr_of_link_frequencies == 0 || + bus_cfg.nr_of_link_frequencies == i) { + ret = dev_err_probe(dev, -EINVAL, + "supported link freq %lld not found\n", + sensor->link_freq[0]); + goto out_free_bus_cfg; + } + +out_free_bus_cfg: + v4l2_fwnode_endpoint_free(&bus_cfg); + return ret; +} + +static int ov2680_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct ov2680_dev *sensor; + int ret; + + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); + if (!sensor) + return -ENOMEM; + + sensor->dev = &client->dev; + + sensor->regmap = devm_cci_regmap_init_i2c(client, 16); + if (IS_ERR(sensor->regmap)) + return PTR_ERR(sensor->regmap); + + ret = ov2680_parse_dt(sensor); + if (ret < 0) + return ret; + + ret = ov2680_mode_init(sensor); + if (ret < 0) + return ret; + + ret = ov2680_get_regulators(sensor); + if (ret < 0) { + dev_err(dev, "failed to get regulators\n"); + return ret; + } + + mutex_init(&sensor->lock); + + /* + * Power up and verify the chip now, so that if runtime pm is + * disabled the chip is left on and streaming will work. + */ + ret = ov2680_power_on(sensor); + if (ret < 0) + goto lock_destroy; + + ret = ov2680_check_id(sensor); + if (ret < 0) + goto err_powerdown; + + pm_runtime_set_active(&client->dev); + pm_runtime_get_noresume(&client->dev); + pm_runtime_enable(&client->dev); + + ret = ov2680_v4l2_register(sensor); + if (ret < 0) + goto err_pm_runtime; + + pm_runtime_set_autosuspend_delay(&client->dev, 1000); + pm_runtime_use_autosuspend(&client->dev); + pm_runtime_put_autosuspend(&client->dev); + + return 0; + +err_pm_runtime: + pm_runtime_disable(&client->dev); + pm_runtime_put_noidle(&client->dev); +err_powerdown: + ov2680_power_off(sensor); +lock_destroy: + dev_err(dev, "ov2680 init fail: %d\n", ret); + mutex_destroy(&sensor->lock); + + return ret; +} + +static void ov2680_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + v4l2_async_unregister_subdev(&sensor->sd); + mutex_destroy(&sensor->lock); + media_entity_cleanup(&sensor->sd.entity); + v4l2_ctrl_handler_free(&sensor->ctrls.handler); + + /* + * Disable runtime PM. In case runtime PM is disabled in the kernel, + * make sure to turn power off manually. + */ + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + ov2680_power_off(sensor); + pm_runtime_set_suspended(&client->dev); +} + +static int ov2680_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + if (sensor->is_streaming) + ov2680_stream_disable(sensor); + + return ov2680_power_off(sensor); +} + +static int ov2680_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int ret; + + ret = ov2680_power_on(sensor); + if (ret < 0) + goto stream_disable; + + if (sensor->is_streaming) { + ret = ov2680_stream_enable(sensor); + if (ret < 0) + goto stream_disable; + } + + return 0; + +stream_disable: + ov2680_stream_disable(sensor); + sensor->is_streaming = false; + + return ret; +} + +static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume, + NULL); + +static const struct of_device_id ov2680_dt_ids[] = { + { .compatible = "ovti,ov2680" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ov2680_dt_ids); + +static const struct acpi_device_id ov2680_acpi_ids[] = { + { "OVTI2680" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(acpi, ov2680_acpi_ids); + +static struct i2c_driver ov2680_i2c_driver = { + .driver = { + .name = "ov2680", + .pm = pm_sleep_ptr(&ov2680_pm_ops), + .of_match_table = ov2680_dt_ids, + .acpi_match_table = ov2680_acpi_ids, + }, + .probe = ov2680_probe, + .remove = ov2680_remove, +}; +module_i2c_driver(ov2680_i2c_driver); + +MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>"); +MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); +MODULE_LICENSE("GPL v2"); |