--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Omnivision OV2311 1600x1300 global shutter image sensor driver
+ * Copyright (C) 2022, Raspberry Pi (Trading) Ltd
+ *
+ * This driver is based on the OV9281 driver.
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ * Register configuration from
+ * https://github.com/ArduCAM/ArduCAM_USB_Camera_Shield/tree/master/Config/USB3.0_UC-425_Rev.C%2BUC-628_Rev.B/OV2311
+ * with additional exposure and gain register information from
+ * https://github.com/renesas-rcar/linux-bsp/tree/0cf6e36f5bf49e1c2aab87139ec5b588623c56f8/drivers/media/i2c/imagers
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define OV2311_LINK_FREQ 400000000
+#define OV2311_LANES 2
+
+/* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */
+#define OV2311_PIXEL_RATE_10BIT (OV2311_LINK_FREQ * 2 * \
+ OV2311_LANES / 10)
+#define OV2311_PIXEL_RATE_8BIT (OV2311_LINK_FREQ * 2 * \
+ OV2311_LANES / 8)
+#define OV2311_XVCLK_FREQ 24000000
+
+#define CHIP_ID 0x2311
+#define OV2311_REG_CHIP_ID 0x300a
+
+#define OV2311_REG_CTRL_MODE 0x0100
+#define OV2311_MODE_SW_STANDBY 0x0
+#define OV2311_MODE_STREAMING BIT(0)
+
+#define OV2311_REG_V_FLIP 0x3820
+#define OV2311_REG_H_FLIP 0x3821
+#define OV2311_FLIP_BIT BIT(2)
+
+#define OV2311_REG_EXPOSURE 0x3501
+#define OV2311_EXPOSURE_MIN 4
+#define OV2311_EXPOSURE_STEP 1
+#define OV2311_VTS_MAX 0xffff
+
+#define OV2311_REG_GAIN_H 0x3508
+#define OV2311_REG_GAIN_L 0x3509
+#define OV2311_GAIN_H_MASK 0x07
+#define OV2311_GAIN_H_SHIFT 8
+#define OV2311_GAIN_L_MASK 0xff
+#define OV2311_GAIN_MIN 0x100
+#define OV2311_GAIN_MAX 0x780
+#define OV2311_GAIN_STEP 1
+#define OV2311_GAIN_DEFAULT OV2311_GAIN_MIN
+
+#define OV2311_REG_TEST_PATTERN 0x5e00
+#define OV2311_TEST_PATTERN_ENABLE 0x80
+#define OV2311_TEST_PATTERN_DISABLE 0x0
+
+#define OV2311_REG_VTS 0x380e
+
+/*
+ * OV2311 native and active pixel array size.
+ * Datasheet not available to confirm these values. renesas-rcar linux-bsp tree
+ * has these values.
+ */
+#define OV2311_NATIVE_WIDTH 1616U
+#define OV2311_NATIVE_HEIGHT 1316U
+#define OV2311_PIXEL_ARRAY_LEFT 8U
+#define OV2311_PIXEL_ARRAY_TOP 8U
+#define OV2311_PIXEL_ARRAY_WIDTH 1600U
+#define OV2311_PIXEL_ARRAY_HEIGHT 1300U
+
+#define REG_NULL 0xFFFF
+
+#define OV2311_REG_VALUE_08BIT 1
+#define OV2311_REG_VALUE_16BIT 2
+#define OV2311_REG_VALUE_24BIT 3
+
+#define OV2311_NAME "ov2311"
+
+static const char * const ov2311_supply_names[] = {
+ "avdd", /* Analog power */
+ "dovdd", /* Digital I/O power */
+ "dvdd", /* Digital core power */
+};
+
+#define OV2311_NUM_SUPPLIES ARRAY_SIZE(ov2311_supply_names)
+
+struct regval {
+ u16 addr;
+ u8 val;
+};
+
+struct ov2311_mode {
+ u32 width;
+ u32 height;
+ u32 hts_def;
+ u32 vts_def;
+ u32 exp_def;
+ struct v4l2_rect crop;
+ const struct regval *reg_list;
+};
+
+struct ov2311 {
+ struct i2c_client *client;
+ struct clk *xvclk;
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *pwdn_gpio;
+ struct regulator_bulk_data supplies[OV2311_NUM_SUPPLIES];
+
+ struct v4l2_subdev subdev;
+ struct media_pad pad;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_ctrl *exposure;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *pixel_rate;
+ /*
+ * Mutex for serialized access:
+ * Protect sensor module set pad format and start/stop streaming safely.
+ */
+ struct mutex mutex;
+
+ /* Streaming on/off */
+ bool streaming;
+
+ const struct ov2311_mode *cur_mode;
+ u32 code;
+};
+
+#define to_ov2311(sd) container_of(sd, struct ov2311, subdev)
+
+/*
+ * Xclk 24Mhz
+ * max_framerate 60fps for 10 bit, 74.6fps for 8 bit.
+ */
+static const struct regval ov2311_common_regs[] = {
+ { 0x0103, 0x01 },
+ { 0x0100, 0x00 },
+ { 0x0300, 0x01 },
+ { 0x0302, 0x32 },
+ { 0x0303, 0x00 },
+ { 0x0304, 0x03 },
+ { 0x0305, 0x02 },
+ { 0x0306, 0x01 },
+ { 0x030e, 0x04 },
+ { 0x3001, 0x02 },
+ { 0x3004, 0x00 },
+ { 0x3005, 0x00 },
+ { 0x3006, 0x00 },
+ { 0x3011, 0x0d },
+ { 0x3014, 0x04 },
+ { 0x301c, 0xf0 },
+ { 0x3020, 0x00 },
+ { 0x302c, 0x00 },
+ { 0x302d, 0x12 },
+ { 0x302e, 0x4c },
+ { 0x302f, 0x8c },
+ { 0x3030, 0x10 },
+ { 0x303f, 0x03 },
+ { 0x3103, 0x00 },
+ { 0x3106, 0x08 },
+ { 0x31ff, 0x01 },
+ { 0x3501, 0x05 },
+ { 0x3502, 0xba },
+ { 0x3506, 0x00 },
+ { 0x3507, 0x00 },
+ { 0x3620, 0x67 },
+ { 0x3633, 0x78 },
+ { 0x3666, 0x00 },
+ { 0x3670, 0x68 },
+ { 0x3674, 0x10 },
+ { 0x3675, 0x00 },
+ { 0x3680, 0x84 },
+ { 0x36a2, 0x04 },
+ { 0x36a3, 0x80 },
+ { 0x36b0, 0x00 },
+ { 0x3700, 0x35 },
+ { 0x3704, 0x59 },
+ { 0x3712, 0x00 },
+ { 0x3713, 0x02 },
+ { 0x379b, 0x01 },
+ { 0x379c, 0x10 },
+ { 0x3800, 0x00 },
+ { 0x3801, 0x00 },
+ { 0x3804, 0x06 },
+ { 0x3805, 0x4f },
+ { 0x3810, 0x00 },
+ { 0x3811, 0x08 },
+ { 0x3812, 0x00 },
+ { 0x3813, 0x08 },
+ { 0x3814, 0x11 },
+ { 0x3815, 0x11 },
+ { 0x3816, 0x00 },
+ { 0x3817, 0x00 },
+ { 0x3818, 0x04 },
+ { 0x3819, 0x00 },
+ { 0x382b, 0x5a },
+ { 0x382c, 0x09 },
+ { 0x382d, 0x9a },
+ { 0x3882, 0x02 },
+ { 0x3883, 0x6c },
+ { 0x3885, 0x07 },
+ { 0x389d, 0x03 },
+ { 0x38a6, 0x00 },
+ { 0x38a7, 0x01 },
+ { 0x38b3, 0x07 },
+ { 0x38b1, 0x00 },
+ { 0x38e5, 0x02 },
+ { 0x38e7, 0x00 },
+ { 0x38e8, 0x00 },
+ { 0x3910, 0xff },
+ { 0x3911, 0xff },
+ { 0x3912, 0x08 },
+ { 0x3913, 0x00 },
+ { 0x3914, 0x00 },
+ { 0x3915, 0x00 },
+ { 0x391c, 0x00 },
+ { 0x3920, 0xa5 },
+ { 0x3921, 0x00 },
+ { 0x3922, 0x00 },
+ { 0x3923, 0x00 },
+ { 0x3924, 0x05 },
+ { 0x3925, 0x00 },
+ { 0x3926, 0x00 },
+ { 0x3927, 0x00 },
+ { 0x3928, 0x1a },
+ { 0x392d, 0x05 },
+ { 0x392e, 0xf2 },
+ { 0x392f, 0x40 },
+ { 0x4001, 0x00 },
+ { 0x4003, 0x40 },
+ { 0x4008, 0x12 },
+ { 0x4009, 0x1b },
+ { 0x400c, 0x0c },
+ { 0x400d, 0x13 },
+ { 0x4010, 0xf0 },
+ { 0x4011, 0x00 },
+ { 0x4016, 0x00 },
+ { 0x4017, 0x04 },
+ { 0x4042, 0x11 },
+ { 0x4043, 0x70 },
+ { 0x4045, 0x00 },
+ { 0x4409, 0x5f },
+ { 0x450b, 0x00 },
+ { 0x4600, 0x00 },
+ { 0x4601, 0xa0 },
+ { 0x4708, 0x09 },
+ { 0x470c, 0x81 },
+ { 0x4710, 0x06 },
+ { 0x4711, 0x00 },
+ { 0x4800, 0x00 },
+ { 0x481f, 0x30 },
+ { 0x4837, 0x14 },
+ { 0x4f00, 0x00 },
+ { 0x4f07, 0x00 },
+ { 0x4f08, 0x03 },
+ { 0x4f09, 0x08 },
+ { 0x4f0c, 0x06 },
+ { 0x4f0d, 0x02 },
+ { 0x4f10, 0x00 },
+ { 0x4f11, 0x00 },
+ { 0x4f12, 0x07 },
+ { 0x4f13, 0xe2 },
+ { 0x5000, 0x9f },
+ { 0x5001, 0x20 },
+ { 0x5026, 0x00 },
+ { 0x5c00, 0x00 },
+ { 0x5c01, 0x2c },
+ { 0x5c02, 0x00 },
+ { 0x5c03, 0x7f },
+ { 0x5e00, 0x00 },
+ { 0x5e01, 0x41 },
+ {REG_NULL, 0x00},
+};
+
+static const struct regval ov2311_1600x1300_regs[] = {
+ { 0x3802, 0x00 },
+ { 0x3803, 0x00 },
+ { 0x3806, 0x05 },
+ { 0x3807, 0x23 },
+ { 0x3808, 0x06 },
+ { 0x3809, 0x40 },
+ { 0x380a, 0x05 },
+ { 0x380b, 0x14 },
+ { 0x380c, 0x03 },
+ { 0x380d, 0x88 },
+ {REG_NULL, 0x00},
+};
+
+static const struct regval ov2311_1600x1080_regs[] = {
+ { 0x3802, 0x00 },
+ { 0x3803, 0x6e },
+ { 0x3806, 0x04 },
+ { 0x3807, 0xae },
+ { 0x3808, 0x06 },
+ { 0x3809, 0x40 },
+ { 0x380a, 0x04 },
+ { 0x380b, 0x38 },
+ { 0x380c, 0x03 },
+ { 0x380d, 0x88 },
+
+ { 0x5d01, 0x00 },
+ { 0x5d02, 0x04 },
+ { 0x5d03, 0x00 },
+ { 0x5d04, 0x04 },
+ { 0x5d05, 0x00 },
+ {REG_NULL, 0x00},
+};
+
+static const struct regval op_10bit[] = {
+ { 0x030d, 0x5a },
+ { 0x3662, 0x65 },
+ {REG_NULL, 0x00},
+};
+
+static const struct regval op_8bit[] = {
+ { 0x030d, 0x70 },
+ { 0x3662, 0x67 },
+ {REG_NULL, 0x00},
+};
+
+static const struct ov2311_mode supported_modes[] = {
+ {
+ .width = 1600,
+ .height = 1300,
+ .exp_def = 0x0320,
+ .hts_def = (0x0388 * 2),/* Registers 0x380c / 0x380d * 2 */
+ .vts_def = 0x5c2, /* Registers 0x380e / 0x380f
+ * 60fps for 10bpp
+ */
+ .crop = {
+ .left = OV2311_PIXEL_ARRAY_LEFT,
+ .top = OV2311_PIXEL_ARRAY_TOP,
+ .width = 1600,
+ .height = 1300
+ },
+ .reg_list = ov2311_1600x1300_regs,
+ },
+ {
+ .width = 1600,
+ .height = 1080,
+ .exp_def = 0x0320,
+ .hts_def = (0x0388 * 2),/* Registers 0x380c / 0x380d * 2 */
+ .vts_def = 0x5c2, /* Registers 0x380e / 0x380f
+ * 60fps for 10bpp
+ */
+ .crop = {
+ .left = OV2311_PIXEL_ARRAY_LEFT,
+ .top = 110 + OV2311_PIXEL_ARRAY_TOP,
+ .width = 1600,
+ .height = 1080
+ },
+ .reg_list = ov2311_1600x1080_regs,
+ },
+};
+
+static const s64 link_freq_menu_items[] = {
+ OV2311_LINK_FREQ
+};
+
+static const char * const ov2311_test_pattern_menu[] = {
+ "Disabled",
+ "Vertical Color Bar Type 1",
+ "Vertical Color Bar Type 2",
+ "Vertical Color Bar Type 3",
+ "Vertical Color Bar Type 4"
+};
+
+/* Write registers up to 4 at a time */
+static int ov2311_write_reg(struct i2c_client *client, u16 reg,
+ u32 len, u32 val)
+{
+ u32 buf_i, val_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 ov2311_write_array(struct i2c_client *client,
+ const struct regval *regs)
+{
+ u32 i;
+ int ret = 0;
+
+ for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
+ ret = ov2311_write_reg(client, regs[i].addr,
+ OV2311_REG_VALUE_08BIT, regs[i].val);
+
+ return ret;
+}
+
+/* Read registers up to 4 at a time */
+static int ov2311_read_reg(struct i2c_client *client, u16 reg, unsigned int 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 || !len)
+ 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 int ov2311_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ov2311 *ov2311 = to_ov2311(sd);
+ const struct ov2311_mode *mode;
+ s64 h_blank, vblank_def, pixel_rate;
+
+ mutex_lock(&ov2311->mutex);
+
+ mode = v4l2_find_nearest_size(supported_modes,
+ ARRAY_SIZE(supported_modes),
+ width, height,
+ fmt->format.width,
+ fmt->format.height);
+ if (fmt->format.code != MEDIA_BUS_FMT_Y8_1X8)
+ fmt->format.code = MEDIA_BUS_FMT_Y10_1X10;
+ fmt->format.width = mode->width;
+ fmt->format.height = mode->height;
+ fmt->format.field = V4L2_FIELD_NONE;
+ fmt->format.colorspace = V4L2_COLORSPACE_RAW;
+ fmt->format.ycbcr_enc =
+ V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->format.colorspace);
+ fmt->format.quantization =
+ V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->format.colorspace,
+ fmt->format.ycbcr_enc);
+ fmt->format.xfer_func =
+ V4L2_MAP_XFER_FUNC_DEFAULT(fmt->format.colorspace);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) =
+ fmt->format;
+ } else {
+ ov2311->cur_mode = mode;
+ ov2311->code = fmt->format.code;
+ h_blank = mode->hts_def - mode->width;
+ __v4l2_ctrl_modify_range(ov2311->hblank, h_blank,
+ h_blank, 1, h_blank);
+ __v4l2_ctrl_s_ctrl(ov2311->hblank, h_blank);
+ vblank_def = mode->vts_def - mode->height;
+ __v4l2_ctrl_modify_range(ov2311->vblank, vblank_def,
+ OV2311_VTS_MAX - mode->height,
+ 1, vblank_def);
+ __v4l2_ctrl_s_ctrl(ov2311->vblank, vblank_def);
+
+ pixel_rate = (fmt->format.code == MEDIA_BUS_FMT_Y10_1X10) ?
+ OV2311_PIXEL_RATE_10BIT : OV2311_PIXEL_RATE_8BIT;
+ __v4l2_ctrl_modify_range(ov2311->pixel_rate, pixel_rate,
+ pixel_rate, 1, pixel_rate);
+ }
+
+ mutex_unlock(&ov2311->mutex);
+
+ return 0;
+}
+
+static int ov2311_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ov2311 *ov2311 = to_ov2311(sd);
+ const struct ov2311_mode *mode = ov2311->cur_mode;
+
+ mutex_lock(&ov2311->mutex);
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ fmt->format = *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
+ } else {
+ fmt->format.width = mode->width;
+ fmt->format.height = mode->height;
+ fmt->format.code = ov2311->code;
+ fmt->format.field = V4L2_FIELD_NONE;
+ fmt->format.colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->format.ycbcr_enc =
+ V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->format.colorspace);
+ fmt->format.quantization =
+ V4L2_MAP_QUANTIZATION_DEFAULT(true,
+ fmt->format.colorspace,
+ fmt->format.ycbcr_enc);
+ fmt->format.xfer_func =
+ V4L2_MAP_XFER_FUNC_DEFAULT(fmt->format.colorspace);
+ }
+ mutex_unlock(&ov2311->mutex);
+
+ return 0;
+}
+
+static int ov2311_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ switch (code->index) {
+ default:
+ return -EINVAL;
+ case 0:
+ code->code = MEDIA_BUS_FMT_Y10_1X10;
+ break;
+ case 1:
+ code->code = MEDIA_BUS_FMT_Y8_1X8;
+ break;
+ }
+
+ return 0;
+}
+
+static int ov2311_enum_frame_sizes(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_Y10_1X10 &&
+ fse->code != MEDIA_BUS_FMT_Y8_1X8)
+ 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 ov2311_enable_test_pattern(struct ov2311 *ov2311, u32 pattern)
+{
+ u32 val;
+
+ if (pattern)
+ val = (pattern - 1) | OV2311_TEST_PATTERN_ENABLE;
+ else
+ val = OV2311_TEST_PATTERN_DISABLE;
+
+ return ov2311_write_reg(ov2311->client, OV2311_REG_TEST_PATTERN,
+ OV2311_REG_VALUE_08BIT, val);
+}
+
+static const struct v4l2_rect *
+__ov2311_get_pad_crop(struct ov2311 *ov2311, struct v4l2_subdev_state *sd_state,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_crop(&ov2311->subdev, sd_state, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &ov2311->cur_mode->crop;
+ }
+
+ return NULL;
+}
+
+static int ov2311_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_selection *sel)
+{
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP: {
+ struct ov2311 *ov2311 = to_ov2311(sd);
+
+ mutex_lock(&ov2311->mutex);
+ sel->r = *__ov2311_get_pad_crop(ov2311, sd_state, sel->pad,
+ sel->which);
+ mutex_unlock(&ov2311->mutex);
+
+ return 0;
+ }
+
+ case V4L2_SEL_TGT_NATIVE_SIZE:
+ sel->r.top = 0;
+ sel->r.left = 0;
+ sel->r.width = OV2311_NATIVE_WIDTH;
+ sel->r.height = OV2311_NATIVE_HEIGHT;
+
+ return 0;
+
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ sel->r.top = OV2311_PIXEL_ARRAY_TOP;
+ sel->r.left = OV2311_PIXEL_ARRAY_LEFT;
+ sel->r.width = OV2311_PIXEL_ARRAY_WIDTH;
+ sel->r.height = OV2311_PIXEL_ARRAY_HEIGHT;
+
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int ov2311_start_stream(struct ov2311 *ov2311)
+{
+ int ret;
+
+ ret = ov2311_write_array(ov2311->client, ov2311_common_regs);
+ if (ret)
+ return ret;
+
+ ret = ov2311_write_array(ov2311->client, ov2311->cur_mode->reg_list);
+ if (ret)
+ return ret;
+
+ if (ov2311->code == MEDIA_BUS_FMT_Y10_1X10)
+ ret = ov2311_write_array(ov2311->client, op_10bit);
+ else
+ ret = ov2311_write_array(ov2311->client, op_8bit);
+ if (ret)
+ return ret;
+
+ /* In case these controls are set before streaming */
+ mutex_unlock(&ov2311->mutex);
+ ret = v4l2_ctrl_handler_setup(&ov2311->ctrl_handler);
+ mutex_lock(&ov2311->mutex);
+ if (ret)
+ return ret;
+
+ return ov2311_write_reg(ov2311->client, OV2311_REG_CTRL_MODE,
+ OV2311_REG_VALUE_08BIT, OV2311_MODE_STREAMING);
+}
+
+static int ov2311_stop_stream(struct ov2311 *ov2311)
+{
+ return ov2311_write_reg(ov2311->client, OV2311_REG_CTRL_MODE,
+ OV2311_REG_VALUE_08BIT, OV2311_MODE_SW_STANDBY);
+}
+
+static int ov2311_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct ov2311 *ov2311 = to_ov2311(sd);
+ struct i2c_client *client = ov2311->client;
+ int ret = 0;
+
+ mutex_lock(&ov2311->mutex);
+ if (ov2311->streaming == enable) {
+ mutex_unlock(&ov2311->mutex);
+ return 0;
+ }
+
+ if (enable) {
+ ret = pm_runtime_resume_and_get(&client->dev);
+ if (ret < 0)
+ goto unlock_and_return;
+
+ ret = ov2311_start_stream(ov2311);
+ if (ret) {
+ v4l2_err(sd, "start stream failed while write regs\n");
+ pm_runtime_put(&client->dev);
+ goto unlock_and_return;
+ }
+ } else {
+ ov2311_stop_stream(ov2311);
+ pm_runtime_put(&client->dev);
+ }
+
+ ov2311->streaming = enable;
+
+unlock_and_return:
+ mutex_unlock(&ov2311->mutex);
+
+ return ret;
+}
+
+static int ov2311_power_on(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct ov2311 *ov2311 = to_ov2311(sd);
+ int ret;
+
+ ret = clk_set_rate(ov2311->xvclk, OV2311_XVCLK_FREQ);
+ if (ret < 0)
+ dev_warn(dev, "Failed to set xvclk rate (24MHz)\n");
+ if (clk_get_rate(ov2311->xvclk) != OV2311_XVCLK_FREQ)
+ dev_warn(dev, "xvclk mismatched, modes are based on 24MHz - rate is %lu\n",
+ clk_get_rate(ov2311->xvclk));
+
+ ret = clk_prepare_enable(ov2311->xvclk);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable xvclk\n");
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(ov2311->reset_gpio, 0);
+
+ ret = regulator_bulk_enable(OV2311_NUM_SUPPLIES, ov2311->supplies);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable regulators\n");
+ goto disable_clk;
+ }
+
+ gpiod_set_value_cansleep(ov2311->reset_gpio, 1);
+
+ usleep_range(500, 1000);
+ gpiod_set_value_cansleep(ov2311->pwdn_gpio, 1);
+
+ usleep_range(1000, 2000);
+
+ return 0;
+
+disable_clk:
+ clk_disable_unprepare(ov2311->xvclk);
+
+ return ret;
+}
+
+static int ov2311_power_off(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct ov2311 *ov2311 = to_ov2311(sd);
+
+ gpiod_set_value_cansleep(ov2311->pwdn_gpio, 0);
+ clk_disable_unprepare(ov2311->xvclk);
+ gpiod_set_value_cansleep(ov2311->reset_gpio, 0);
+ regulator_bulk_disable(OV2311_NUM_SUPPLIES, ov2311->supplies);
+
+ return 0;
+}
+
+static int ov2311_runtime_resume(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct ov2311 *ov2311 = to_ov2311(sd);
+ int ret;
+
+ if (ov2311->streaming) {
+ ret = ov2311_start_stream(ov2311);
+ if (ret)
+ goto error;
+ }
+ return 0;
+
+error:
+ ov2311_stop_stream(ov2311);
+ ov2311->streaming = 0;
+ return ret;
+}
+
+static int ov2311_runtime_suspend(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct ov2311 *ov2311 = to_ov2311(sd);
+
+ if (ov2311->streaming)
+ ov2311_stop_stream(ov2311);
+
+ return 0;
+}
+
+static int ov2311_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct ov2311 *ov2311 = to_ov2311(sd);
+ struct v4l2_mbus_framefmt *try_fmt =
+ v4l2_subdev_get_try_format(sd, fh->state, 0);
+ const struct ov2311_mode *def_mode = &supported_modes[0];
+
+ mutex_lock(&ov2311->mutex);
+ /* Initialize try_fmt */
+ try_fmt->width = def_mode->width;
+ try_fmt->height = def_mode->height;
+ try_fmt->code = MEDIA_BUS_FMT_Y10_1X10;
+ try_fmt->field = V4L2_FIELD_NONE;
+ try_fmt->colorspace = V4L2_COLORSPACE_RAW;
+ try_fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(try_fmt->colorspace);
+ try_fmt->quantization =
+ V4L2_MAP_QUANTIZATION_DEFAULT(true, try_fmt->colorspace,
+ try_fmt->ycbcr_enc);
+ try_fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(try_fmt->colorspace);
+
+ mutex_unlock(&ov2311->mutex);
+ /* No crop or compose */
+
+ return 0;
+}
+
+static const struct dev_pm_ops ov2311_pm_ops = {
+ SET_RUNTIME_PM_OPS(ov2311_runtime_suspend, ov2311_runtime_resume, NULL)
+ SET_RUNTIME_PM_OPS(ov2311_power_off, ov2311_power_on, NULL)
+};
+
+static const struct v4l2_subdev_internal_ops ov2311_internal_ops = {
+ .open = ov2311_open,
+};
+
+static const struct v4l2_subdev_core_ops ov2311_core_ops = {
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_video_ops ov2311_video_ops = {
+ .s_stream = ov2311_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ov2311_pad_ops = {
+ .enum_mbus_code = ov2311_enum_mbus_code,
+ .enum_frame_size = ov2311_enum_frame_sizes,
+ .get_fmt = ov2311_get_fmt,
+ .set_fmt = ov2311_set_fmt,
+ .get_selection = ov2311_get_selection,
+};
+
+static const struct v4l2_subdev_ops ov2311_subdev_ops = {
+ .core = &ov2311_core_ops,
+ .video = &ov2311_video_ops,
+ .pad = &ov2311_pad_ops,
+};
+
+static int ov2311_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct ov2311 *ov2311 = container_of(ctrl->handler,
+ struct ov2311, ctrl_handler);
+ struct i2c_client *client = ov2311->client;
+ s64 max;
+ int ret = 0;
+
+ /* Propagate change of current control to all related controls */
+ switch (ctrl->id) {
+ case V4L2_CID_VBLANK:
+ /* Update max exposure while meeting expected vblanking */
+ max = ov2311->cur_mode->height + ctrl->val - 4;
+ __v4l2_ctrl_modify_range(ov2311->exposure,
+ ov2311->exposure->minimum, max,
+ ov2311->exposure->step,
+ ov2311->exposure->default_value);
+ break;
+ }
+
+ if (pm_runtime_get(&client->dev) <= 0)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ ret = ov2311_write_reg(ov2311->client, OV2311_REG_EXPOSURE,
+ OV2311_REG_VALUE_16BIT, ctrl->val);
+ break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = ov2311_write_reg(ov2311->client, OV2311_REG_GAIN_H,
+ OV2311_REG_VALUE_08BIT,
+ (ctrl->val >> OV2311_GAIN_H_SHIFT) &
+ OV2311_GAIN_H_MASK);
+ ret |= ov2311_write_reg(ov2311->client, OV2311_REG_GAIN_L,
+ OV2311_REG_VALUE_08BIT,
+ ctrl->val & OV2311_GAIN_L_MASK);
+ break;
+ case V4L2_CID_VBLANK:
+ ret = ov2311_write_reg(ov2311->client, OV2311_REG_VTS,
+ OV2311_REG_VALUE_16BIT,
+ ctrl->val + ov2311->cur_mode->height);
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ ret = ov2311_enable_test_pattern(ov2311, ctrl->val);
+ break;
+ case V4L2_CID_HFLIP:
+ ret = ov2311_write_reg(ov2311->client, OV2311_REG_H_FLIP,
+ OV2311_REG_VALUE_08BIT,
+ ctrl->val ? OV2311_FLIP_BIT : 0);
+ break;
+ case V4L2_CID_VFLIP:
+ ret = ov2311_write_reg(ov2311->client, OV2311_REG_V_FLIP,
+ OV2311_REG_VALUE_08BIT,
+ ctrl->val ? OV2311_FLIP_BIT : 0);
+ 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_ctrl_ops ov2311_ctrl_ops = {
+ .s_ctrl = ov2311_set_ctrl,
+};
+
+static int ov2311_initialize_controls(struct ov2311 *ov2311)
+{
+ struct v4l2_fwnode_device_properties props;
+ const struct ov2311_mode *mode;
+ struct v4l2_ctrl_handler *handler;
+ struct v4l2_ctrl *ctrl;
+ s64 exposure_max, vblank_def;
+ u32 h_blank;
+ int ret;
+
+ handler = &ov2311->ctrl_handler;
+ mode = ov2311->cur_mode;
+ ret = v4l2_ctrl_handler_init(handler, 11);
+ if (ret)
+ return ret;
+ handler->lock = &ov2311->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;
+
+ ov2311->pixel_rate = v4l2_ctrl_new_std(handler, NULL,
+ V4L2_CID_PIXEL_RATE,
+ OV2311_PIXEL_RATE_10BIT,
+ OV2311_PIXEL_RATE_10BIT, 1,
+ OV2311_PIXEL_RATE_10BIT);
+
+ h_blank = mode->hts_def - mode->width;
+ ov2311->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
+ h_blank, h_blank, 1, h_blank);
+ if (ov2311->hblank)
+ ov2311->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ vblank_def = mode->vts_def - mode->height;
+ ov2311->vblank = v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops,
+ V4L2_CID_VBLANK, vblank_def,
+ OV2311_VTS_MAX - mode->height, 1,
+ vblank_def);
+
+ exposure_max = mode->vts_def - 4;
+ ov2311->exposure = v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops,
+ V4L2_CID_EXPOSURE,
+ OV2311_EXPOSURE_MIN, exposure_max,
+ OV2311_EXPOSURE_STEP,
+ mode->exp_def);
+
+ v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+ OV2311_GAIN_MIN, OV2311_GAIN_MAX, OV2311_GAIN_STEP,
+ OV2311_GAIN_DEFAULT);
+
+ v4l2_ctrl_new_std_menu_items(handler, &ov2311_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(ov2311_test_pattern_menu) - 1,
+ 0, 0, ov2311_test_pattern_menu);
+
+ v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+
+ v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+ ret = v4l2_fwnode_device_parse(&ov2311->client->dev, &props);
+ if (ret)
+ goto err_free_handler;
+
+ ret = v4l2_ctrl_new_fwnode_properties(handler, &ov2311_ctrl_ops,
+ &props);
+ if (ret)
+ goto err_free_handler;
+
+ if (handler->error) {
+ ret = handler->error;
+ dev_err(&ov2311->client->dev,
+ "Failed to init controls(%d)\n", ret);
+ goto err_free_handler;
+ }
+
+ ov2311->subdev.ctrl_handler = handler;
+
+ return 0;
+
+err_free_handler:
+ v4l2_ctrl_handler_free(handler);
+
+ return ret;
+}
+
+static int ov2311_check_sensor_id(struct ov2311 *ov2311,
+ struct i2c_client *client)
+{
+ struct device *dev = &ov2311->client->dev;
+ u32 id = 0, id_msb = 0;
+ int ret;
+
+ ret = ov2311_read_reg(client, OV2311_REG_CHIP_ID + 1,
+ OV2311_REG_VALUE_08BIT, &id);
+ if (!ret)
+ ret = ov2311_read_reg(client, OV2311_REG_CHIP_ID,
+ OV2311_REG_VALUE_08BIT, &id_msb);
+ id |= (id_msb << 8);
+ if (ret || id != CHIP_ID) {
+ dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret);
+ return -ENODEV;
+ }
+
+ dev_info(dev, "Detected OV%06x sensor\n", CHIP_ID);
+
+ return 0;
+}
+
+static int ov2311_configure_regulators(struct ov2311 *ov2311)
+{
+ unsigned int i;
+
+ for (i = 0; i < OV2311_NUM_SUPPLIES; i++)
+ ov2311->supplies[i].supply = ov2311_supply_names[i];
+
+ return devm_regulator_bulk_get(&ov2311->client->dev,
+ OV2311_NUM_SUPPLIES,
+ ov2311->supplies);
+}
+
+static int ov2311_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ov2311 *ov2311;
+ struct v4l2_subdev *sd;
+ int ret;
+
+ ov2311 = devm_kzalloc(dev, sizeof(*ov2311), GFP_KERNEL);
+ if (!ov2311)
+ return -ENOMEM;
+
+ ov2311->client = client;
+ ov2311->cur_mode = &supported_modes[0];
+
+ ov2311->xvclk = devm_clk_get(dev, "xvclk");
+ if (IS_ERR(ov2311->xvclk)) {
+ dev_err(dev, "Failed to get xvclk\n");
+ return -EINVAL;
+ }
+
+ ov2311->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ov2311->reset_gpio))
+ dev_warn(dev, "Failed to get reset-gpios\n");
+
+ ov2311->pwdn_gpio = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_LOW);
+ if (IS_ERR(ov2311->pwdn_gpio))
+ dev_warn(dev, "Failed to get pwdn-gpios\n");
+
+ ret = ov2311_configure_regulators(ov2311);
+ if (ret) {
+ dev_err(dev, "Failed to get power regulators\n");
+ return ret;
+ }
+
+ mutex_init(&ov2311->mutex);
+
+ sd = &ov2311->subdev;
+ v4l2_i2c_subdev_init(sd, client, &ov2311_subdev_ops);
+ ret = ov2311_initialize_controls(ov2311);
+ if (ret)
+ goto err_destroy_mutex;
+
+ ret = ov2311_power_on(&client->dev);
+ if (ret)
+ goto err_free_handler;
+
+ ret = ov2311_check_sensor_id(ov2311, client);
+ if (ret)
+ goto err_power_off;
+
+ sd->internal_ops = &ov2311_internal_ops;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ ov2311->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ret = media_entity_pads_init(&sd->entity, 1, &ov2311->pad);
+ if (ret < 0)
+ goto err_power_off;
+
+ ret = v4l2_async_register_subdev(sd);
+ 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:
+ media_entity_cleanup(&sd->entity);
+err_power_off:
+ ov2311_power_off(&client->dev);
+err_free_handler:
+ v4l2_ctrl_handler_free(&ov2311->ctrl_handler);
+err_destroy_mutex:
+ mutex_destroy(&ov2311->mutex);
+
+ return ret;
+}
+
+static void ov2311_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2311 *ov2311 = to_ov2311(sd);
+
+ v4l2_async_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(&ov2311->ctrl_handler);
+ mutex_destroy(&ov2311->mutex);
+
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev))
+ ov2311_power_off(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+}
+
+static const struct of_device_id ov2311_of_match[] = {
+ { .compatible = "ovti,ov2311" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ov2311_of_match);
+
+static const struct i2c_device_id ov2311_match_id[] = {
+ { "ovti,ov2311", 0 },
+ { },
+};
+
+static struct i2c_driver ov2311_i2c_driver = {
+ .driver = {
+ .name = OV2311_NAME,
+ .pm = &ov2311_pm_ops,
+ .of_match_table = of_match_ptr(ov2311_of_match),
+ },
+ .probe = &ov2311_probe,
+ .remove = &ov2311_remove,
+ .id_table = ov2311_match_id,
+};
+
+module_i2c_driver(ov2311_i2c_driver);
+
+MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com");
+MODULE_DESCRIPTION("OmniVision OV2311 sensor driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff