--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2021 Intel Corporation
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <asm/unaligned.h>
+
+#define IMX208_REG_MODE_SELECT 0x0100
+#define IMX208_MODE_STANDBY 0x00
+#define IMX208_MODE_STREAMING 0x01
+
+/* Chip ID */
+#define IMX208_REG_CHIP_ID 0x0000
+#define IMX208_CHIP_ID 0x0208
+
+/* V_TIMING internal */
+#define IMX208_REG_VTS 0x0340
+#define IMX208_VTS_60FPS 0x0472
+#define IMX208_VTS_BINNING 0x0239
+#define IMX208_VTS_60FPS_MIN 0x0458
+#define IMX208_VTS_BINNING_MIN 0x0230
+#define IMX208_VTS_MAX 0xffff
+
+/* HBLANK control - read only */
+#define IMX208_PPL_384MHZ 2248
+#define IMX208_PPL_96MHZ 2248
+
+/* Exposure control */
+#define IMX208_REG_EXPOSURE 0x0202
+#define IMX208_EXPOSURE_MIN 4
+#define IMX208_EXPOSURE_STEP 1
+#define IMX208_EXPOSURE_DEFAULT 0x190
+#define IMX208_EXPOSURE_MAX 65535
+
+/* Analog gain control */
+#define IMX208_REG_ANALOG_GAIN 0x0204
+#define IMX208_ANA_GAIN_MIN 0
+#define IMX208_ANA_GAIN_MAX 0x00e0
+#define IMX208_ANA_GAIN_STEP 1
+#define IMX208_ANA_GAIN_DEFAULT 0x0
+
+/* Digital gain control */
+#define IMX208_REG_GR_DIGITAL_GAIN 0x020e
+#define IMX208_REG_R_DIGITAL_GAIN 0x0210
+#define IMX208_REG_B_DIGITAL_GAIN 0x0212
+#define IMX208_REG_GB_DIGITAL_GAIN 0x0214
+#define IMX208_DIGITAL_GAIN_SHIFT 8
+
+/* Orientation */
+#define IMX208_REG_ORIENTATION_CONTROL 0x0101
+
+/* Test Pattern Control */
+#define IMX208_REG_TEST_PATTERN_MODE 0x0600
+#define IMX208_TEST_PATTERN_DISABLE 0x0
+#define IMX208_TEST_PATTERN_SOLID_COLOR 0x1
+#define IMX208_TEST_PATTERN_COLOR_BARS 0x2
+#define IMX208_TEST_PATTERN_GREY_COLOR 0x3
+#define IMX208_TEST_PATTERN_PN9 0x4
+#define IMX208_TEST_PATTERN_FIX_1 0x100
+#define IMX208_TEST_PATTERN_FIX_2 0x101
+#define IMX208_TEST_PATTERN_FIX_3 0x102
+#define IMX208_TEST_PATTERN_FIX_4 0x103
+#define IMX208_TEST_PATTERN_FIX_5 0x104
+#define IMX208_TEST_PATTERN_FIX_6 0x105
+
+/* OTP Access */
+#define IMX208_OTP_BASE 0x3500
+#define IMX208_OTP_SIZE 40
+
+struct imx208_reg {
+ u16 address;
+ u8 val;
+};
+
+struct imx208_reg_list {
+ u32 num_of_regs;
+ const struct imx208_reg *regs;
+};
+
+/* Link frequency config */
+struct imx208_link_freq_config {
+ u32 pixels_per_line;
+
+ /* PLL registers for this link frequency */
+ struct imx208_reg_list reg_list;
+};
+
+/* Mode : resolution and related config&values */
+struct imx208_mode {
+ /* Frame width */
+ u32 width;
+ /* Frame height */
+ u32 height;
+
+ /* V-timing */
+ u32 vts_def;
+ u32 vts_min;
+
+ /* Index of Link frequency config to be used */
+ u32 link_freq_index;
+ /* Default register values */
+ struct imx208_reg_list reg_list;
+};
+
+static const struct imx208_reg pll_ctrl_reg[] = {
+ {0x0305, 0x02},
+ {0x0307, 0x50},
+ {0x303C, 0x3C},
+};
+
+static const struct imx208_reg mode_1936x1096_60fps_regs[] = {
+ {0x0340, 0x04},
+ {0x0341, 0x72},
+ {0x0342, 0x04},
+ {0x0343, 0x64},
+ {0x034C, 0x07},
+ {0x034D, 0x90},
+ {0x034E, 0x04},
+ {0x034F, 0x48},
+ {0x0381, 0x01},
+ {0x0383, 0x01},
+ {0x0385, 0x01},
+ {0x0387, 0x01},
+ {0x3048, 0x00},
+ {0x3050, 0x01},
+ {0x30D5, 0x00},
+ {0x3301, 0x00},
+ {0x3318, 0x62},
+ {0x0202, 0x01},
+ {0x0203, 0x90},
+ {0x0205, 0x00},
+};
+
+static const struct imx208_reg mode_968_548_60fps_regs[] = {
+ {0x0340, 0x02},
+ {0x0341, 0x39},
+ {0x0342, 0x08},
+ {0x0343, 0xC8},
+ {0x034C, 0x03},
+ {0x034D, 0xC8},
+ {0x034E, 0x02},
+ {0x034F, 0x24},
+ {0x0381, 0x01},
+ {0x0383, 0x03},
+ {0x0385, 0x01},
+ {0x0387, 0x03},
+ {0x3048, 0x01},
+ {0x3050, 0x02},
+ {0x30D5, 0x03},
+ {0x3301, 0x10},
+ {0x3318, 0x75},
+ {0x0202, 0x01},
+ {0x0203, 0x90},
+ {0x0205, 0x00},
+};
+
+static const s64 imx208_discrete_digital_gain[] = {
+ 1, 2, 4, 8, 16,
+};
+
+static const char * const imx208_test_pattern_menu[] = {
+ "Disabled",
+ "Solid Color",
+ "100% Color Bar",
+ "Fade to Grey Color Bar",
+ "PN9",
+ "Fixed Pattern1",
+ "Fixed Pattern2",
+ "Fixed Pattern3",
+ "Fixed Pattern4",
+ "Fixed Pattern5",
+ "Fixed Pattern6"
+};
+
+static const int imx208_test_pattern_val[] = {
+ IMX208_TEST_PATTERN_DISABLE,
+ IMX208_TEST_PATTERN_SOLID_COLOR,
+ IMX208_TEST_PATTERN_COLOR_BARS,
+ IMX208_TEST_PATTERN_GREY_COLOR,
+ IMX208_TEST_PATTERN_PN9,
+ IMX208_TEST_PATTERN_FIX_1,
+ IMX208_TEST_PATTERN_FIX_2,
+ IMX208_TEST_PATTERN_FIX_3,
+ IMX208_TEST_PATTERN_FIX_4,
+ IMX208_TEST_PATTERN_FIX_5,
+ IMX208_TEST_PATTERN_FIX_6,
+};
+
+/* Configurations for supported link frequencies */
+#define IMX208_MHZ (1000 * 1000ULL)
+#define IMX208_LINK_FREQ_384MHZ (384ULL * IMX208_MHZ)
+#define IMX208_LINK_FREQ_96MHZ (96ULL * IMX208_MHZ)
+
+#define IMX208_DATA_RATE_DOUBLE 2
+#define IMX208_NUM_OF_LANES 2
+#define IMX208_PIXEL_BITS 10
+
+enum {
+ IMX208_LINK_FREQ_384MHZ_INDEX,
+ IMX208_LINK_FREQ_96MHZ_INDEX,
+};
+
+/*
+ * pixel_rate = link_freq * data-rate * nr_of_lanes / bits_per_sample
+ * data rate => double data rate; number of lanes => 2; bits per pixel => 10
+ */
+static u64 link_freq_to_pixel_rate(u64 f)
+{
+ f *= IMX208_DATA_RATE_DOUBLE * IMX208_NUM_OF_LANES;
+ do_div(f, IMX208_PIXEL_BITS);
+
+ return f;
+}
+
+/* Menu items for LINK_FREQ V4L2 control */
+static const s64 link_freq_menu_items[] = {
+ [IMX208_LINK_FREQ_384MHZ_INDEX] = IMX208_LINK_FREQ_384MHZ,
+ [IMX208_LINK_FREQ_96MHZ_INDEX] = IMX208_LINK_FREQ_96MHZ,
+};
+
+/* Link frequency configs */
+static const struct imx208_link_freq_config link_freq_configs[] = {
+ [IMX208_LINK_FREQ_384MHZ_INDEX] = {
+ .pixels_per_line = IMX208_PPL_384MHZ,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(pll_ctrl_reg),
+ .regs = pll_ctrl_reg,
+ }
+ },
+ [IMX208_LINK_FREQ_96MHZ_INDEX] = {
+ .pixels_per_line = IMX208_PPL_96MHZ,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(pll_ctrl_reg),
+ .regs = pll_ctrl_reg,
+ }
+ },
+};
+
+/* Mode configs */
+static const struct imx208_mode supported_modes[] = {
+ {
+ .width = 1936,
+ .height = 1096,
+ .vts_def = IMX208_VTS_60FPS,
+ .vts_min = IMX208_VTS_60FPS_MIN,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mode_1936x1096_60fps_regs),
+ .regs = mode_1936x1096_60fps_regs,
+ },
+ .link_freq_index = IMX208_LINK_FREQ_384MHZ_INDEX,
+ },
+ {
+ .width = 968,
+ .height = 548,
+ .vts_def = IMX208_VTS_BINNING,
+ .vts_min = IMX208_VTS_BINNING_MIN,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mode_968_548_60fps_regs),
+ .regs = mode_968_548_60fps_regs,
+ },
+ .link_freq_index = IMX208_LINK_FREQ_96MHZ_INDEX,
+ },
+};
+
+struct imx208 {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ /* V4L2 Controls */
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *pixel_rate;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *hflip;
+
+ /* Current mode */
+ const struct imx208_mode *cur_mode;
+
+ /*
+ * Mutex for serialized access:
+ * Protect sensor set pad format and start/stop streaming safely.
+ * Protect access to sensor v4l2 controls.
+ */
+ struct mutex imx208_mx;
+
+ /* Streaming on/off */
+ bool streaming;
+
+ /* OTP data */
+ bool otp_read;
+ char otp_data[IMX208_OTP_SIZE];
+};
+
+static inline struct imx208 *to_imx208(struct v4l2_subdev *_sd)
+{
+ return container_of(_sd, struct imx208, sd);
+}
+
+/* Get bayer order based on flip setting. */
+static u32 imx208_get_format_code(struct imx208 *imx208)
+{
+ /*
+ * Only one bayer order is supported.
+ * It depends on the flip settings.
+ */
+ static const u32 codes[2][2] = {
+ { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, },
+ { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, },
+ };
+
+ return codes[imx208->vflip->val][imx208->hflip->val];
+}
+
+/* Read registers up to 4 at a time */
+static int imx208_read_reg(struct imx208 *imx208, u16 reg, u32 len, u32 *val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ struct i2c_msg msgs[2];
+ u8 addr_buf[2] = { reg >> 8, reg & 0xff };
+ u8 data_buf[4] = { 0, };
+ int ret;
+
+ if (len > 4)
+ return -EINVAL;
+
+ /* Write register address */
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = ARRAY_SIZE(addr_buf);
+ msgs[0].buf = addr_buf;
+
+ /* Read data from register */
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = len;
+ msgs[1].buf = &data_buf[4 - len];
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs))
+ return -EIO;
+
+ *val = get_unaligned_be32(data_buf);
+
+ return 0;
+}
+
+/* Write registers up to 4 at a time */
+static int imx208_write_reg(struct imx208 *imx208, u16 reg, u32 len, u32 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ u8 buf[6];
+
+ if (len > 4)
+ return -EINVAL;
+
+ put_unaligned_be16(reg, buf);
+ put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
+ if (i2c_master_send(client, buf, len + 2) != len + 2)
+ return -EIO;
+
+ return 0;
+}
+
+/* Write a list of registers */
+static int imx208_write_regs(struct imx208 *imx208,
+ const struct imx208_reg *regs, u32 len)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < len; i++) {
+ ret = imx208_write_reg(imx208, regs[i].address, 1,
+ regs[i].val);
+ if (ret) {
+ dev_err_ratelimited(&client->dev,
+ "Failed to write reg 0x%4.4x. error = %d\n",
+ regs[i].address, ret);
+
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/* Open sub-device */
+static int imx208_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *try_fmt =
+ v4l2_subdev_get_try_format(sd, fh->pad, 0);
+
+ /* Initialize try_fmt */
+ try_fmt->width = supported_modes[0].width;
+ try_fmt->height = supported_modes[0].height;
+ try_fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ try_fmt->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int imx208_update_digital_gain(struct imx208 *imx208, u32 len, u32 val)
+{
+ int ret;
+
+ val = imx208_discrete_digital_gain[val] << IMX208_DIGITAL_GAIN_SHIFT;
+
+ ret = imx208_write_reg(imx208, IMX208_REG_GR_DIGITAL_GAIN, 2, val);
+ if (ret)
+ return ret;
+
+ ret = imx208_write_reg(imx208, IMX208_REG_GB_DIGITAL_GAIN, 2, val);
+ if (ret)
+ return ret;
+
+ ret = imx208_write_reg(imx208, IMX208_REG_R_DIGITAL_GAIN, 2, val);
+ if (ret)
+ return ret;
+
+ return imx208_write_reg(imx208, IMX208_REG_B_DIGITAL_GAIN, 2, val);
+}
+
+static int imx208_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct imx208 *imx208 =
+ container_of(ctrl->handler, struct imx208, ctrl_handler);
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ int ret;
+
+ /*
+ * Applying V4L2 control value only happens
+ * when power is up for streaming
+ */
+ if (!pm_runtime_get_if_in_use(&client->dev))
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = imx208_write_reg(imx208, IMX208_REG_ANALOG_GAIN,
+ 2, ctrl->val);
+ break;
+ case V4L2_CID_EXPOSURE:
+ ret = imx208_write_reg(imx208, IMX208_REG_EXPOSURE,
+ 2, ctrl->val);
+ break;
+ case V4L2_CID_DIGITAL_GAIN:
+ ret = imx208_update_digital_gain(imx208, 2, ctrl->val);
+ break;
+ case V4L2_CID_VBLANK:
+ /* Update VTS that meets expected vertical blanking */
+ ret = imx208_write_reg(imx208, IMX208_REG_VTS, 2,
+ imx208->cur_mode->height + ctrl->val);
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ ret = imx208_write_reg(imx208, IMX208_REG_TEST_PATTERN_MODE,
+ 2, imx208_test_pattern_val[ctrl->val]);
+ break;
+ case V4L2_CID_HFLIP:
+ case V4L2_CID_VFLIP:
+ ret = imx208_write_reg(imx208, IMX208_REG_ORIENTATION_CONTROL,
+ 1,
+ imx208->hflip->val |
+ imx208->vflip->val << 1);
+ break;
+ default:
+ ret = -EINVAL;
+ dev_err(&client->dev,
+ "ctrl(id:0x%x,val:0x%x) is not handled\n",
+ ctrl->id, ctrl->val);
+ break;
+ }
+
+ pm_runtime_put(&client->dev);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops imx208_ctrl_ops = {
+ .s_ctrl = imx208_set_ctrl,
+};
+
+static const struct v4l2_ctrl_config imx208_digital_gain_control = {
+ .ops = &imx208_ctrl_ops,
+ .id = V4L2_CID_DIGITAL_GAIN,
+ .name = "Digital Gain",
+ .type = V4L2_CTRL_TYPE_INTEGER_MENU,
+ .min = 0,
+ .max = ARRAY_SIZE(imx208_discrete_digital_gain) - 1,
+ .step = 0,
+ .def = 0,
+ .menu_skip_mask = 0,
+ .qmenu_int = imx208_discrete_digital_gain,
+};
+
+static int imx208_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct imx208 *imx208 = to_imx208(sd);
+
+ if (code->index > 0)
+ return -EINVAL;
+
+ code->code = imx208_get_format_code(imx208);
+
+ return 0;
+}
+
+static int imx208_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct imx208 *imx208 = to_imx208(sd);
+
+ if (fse->index >= ARRAY_SIZE(supported_modes))
+ return -EINVAL;
+
+ if (fse->code != imx208_get_format_code(imx208))
+ 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 void imx208_mode_to_pad_format(struct imx208 *imx208,
+ const struct imx208_mode *mode,
+ struct v4l2_subdev_format *fmt)
+{
+ fmt->format.width = mode->width;
+ fmt->format.height = mode->height;
+ fmt->format.code = imx208_get_format_code(imx208);
+ fmt->format.field = V4L2_FIELD_NONE;
+}
+
+static int __imx208_get_pad_format(struct imx208 *imx208,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ fmt->format = *v4l2_subdev_get_try_format(&imx208->sd, cfg,
+ fmt->pad);
+ else
+ imx208_mode_to_pad_format(imx208, imx208->cur_mode, fmt);
+
+ return 0;
+}
+
+static int imx208_get_pad_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct imx208 *imx208 = to_imx208(sd);
+ int ret;
+
+ mutex_lock(&imx208->imx208_mx);
+ ret = __imx208_get_pad_format(imx208, cfg, fmt);
+ mutex_unlock(&imx208->imx208_mx);
+
+ return ret;
+}
+
+static int imx208_set_pad_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct imx208 *imx208 = to_imx208(sd);
+ const struct imx208_mode *mode;
+ s32 vblank_def;
+ s32 vblank_min;
+ s64 h_blank;
+ s64 pixel_rate;
+ s64 link_freq;
+
+ mutex_lock(&imx208->imx208_mx);
+
+ fmt->format.code = imx208_get_format_code(imx208);
+ mode = v4l2_find_nearest_size(supported_modes,
+ ARRAY_SIZE(supported_modes), width, height,
+ fmt->format.width, fmt->format.height);
+ imx208_mode_to_pad_format(imx208, mode, fmt);
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
+ } else {
+ imx208->cur_mode = mode;
+ __v4l2_ctrl_s_ctrl(imx208->link_freq, mode->link_freq_index);
+ link_freq = link_freq_menu_items[mode->link_freq_index];
+ pixel_rate = link_freq_to_pixel_rate(link_freq);
+ __v4l2_ctrl_s_ctrl_int64(imx208->pixel_rate, pixel_rate);
+ /* Update limits and set FPS to default */
+ vblank_def = imx208->cur_mode->vts_def -
+ imx208->cur_mode->height;
+ vblank_min = imx208->cur_mode->vts_min -
+ imx208->cur_mode->height;
+ __v4l2_ctrl_modify_range(imx208->vblank, vblank_min,
+ IMX208_VTS_MAX - imx208->cur_mode->height,
+ 1, vblank_def);
+ __v4l2_ctrl_s_ctrl(imx208->vblank, vblank_def);
+ h_blank =
+ link_freq_configs[mode->link_freq_index].pixels_per_line
+ - imx208->cur_mode->width;
+ __v4l2_ctrl_modify_range(imx208->hblank, h_blank,
+ h_blank, 1, h_blank);
+ }
+
+ mutex_unlock(&imx208->imx208_mx);
+
+ return 0;
+}
+
+/* Start streaming */
+static int imx208_start_streaming(struct imx208 *imx208)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ const struct imx208_reg_list *reg_list;
+ int ret, link_freq_index;
+
+ /* Setup PLL */
+ link_freq_index = imx208->cur_mode->link_freq_index;
+ reg_list = &link_freq_configs[link_freq_index].reg_list;
+ ret = imx208_write_regs(imx208, reg_list->regs, reg_list->num_of_regs);
+ if (ret) {
+ dev_err(&client->dev, "%s failed to set plls\n", __func__);
+ return ret;
+ }
+
+ /* Apply default values of current mode */
+ reg_list = &imx208->cur_mode->reg_list;
+ ret = imx208_write_regs(imx208, reg_list->regs, reg_list->num_of_regs);
+ if (ret) {
+ dev_err(&client->dev, "%s failed to set mode\n", __func__);
+ return ret;
+ }
+
+ /* Apply customized values from user */
+ ret = __v4l2_ctrl_handler_setup(imx208->sd.ctrl_handler);
+ if (ret)
+ return ret;
+
+ /* set stream on register */
+ return imx208_write_reg(imx208, IMX208_REG_MODE_SELECT,
+ 1, IMX208_MODE_STREAMING);
+}
+
+/* Stop streaming */
+static int imx208_stop_streaming(struct imx208 *imx208)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ int ret;
+
+ /* set stream off register */
+ ret = imx208_write_reg(imx208, IMX208_REG_MODE_SELECT,
+ 1, IMX208_MODE_STANDBY);
+ if (ret)
+ dev_err(&client->dev, "%s failed to set stream\n", __func__);
+
+ /*
+ * Return success even if it was an error, as there is nothing the
+ * caller can do about it.
+ */
+ return 0;
+}
+
+static int imx208_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct imx208 *imx208 = to_imx208(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret = 0;
+
+ mutex_lock(&imx208->imx208_mx);
+ if (imx208->streaming == enable) {
+ mutex_unlock(&imx208->imx208_mx);
+ return 0;
+ }
+
+ if (enable) {
+ ret = pm_runtime_get_sync(&client->dev);
+ if (ret < 0)
+ goto err_rpm_put;
+
+ /*
+ * Apply default & customized values
+ * and then start streaming.
+ */
+ ret = imx208_start_streaming(imx208);
+ if (ret)
+ goto err_rpm_put;
+ } else {
+ imx208_stop_streaming(imx208);
+ pm_runtime_put(&client->dev);
+ }
+
+ imx208->streaming = enable;
+ mutex_unlock(&imx208->imx208_mx);
+
+ /* vflip and hflip cannot change during streaming */
+ v4l2_ctrl_grab(imx208->vflip, enable);
+ v4l2_ctrl_grab(imx208->hflip, enable);
+
+ return ret;
+
+err_rpm_put:
+ pm_runtime_put(&client->dev);
+ mutex_unlock(&imx208->imx208_mx);
+
+ return ret;
+}
+
+static int __maybe_unused imx208_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct imx208 *imx208 = to_imx208(sd);
+
+ if (imx208->streaming)
+ imx208_stop_streaming(imx208);
+
+ return 0;
+}
+
+static int __maybe_unused imx208_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct imx208 *imx208 = to_imx208(sd);
+ int ret;
+
+ if (imx208->streaming) {
+ ret = imx208_start_streaming(imx208);
+ if (ret)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ imx208_stop_streaming(imx208);
+ imx208->streaming = 0;
+
+ return ret;
+}
+
+/* Verify chip ID */
+static int imx208_identify_module(struct imx208 *imx208)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ int ret;
+ u32 val;
+
+ ret = imx208_read_reg(imx208, IMX208_REG_CHIP_ID,
+ 2, &val);
+ if (ret) {
+ dev_err(&client->dev, "failed to read chip id %x\n",
+ IMX208_CHIP_ID);
+ return ret;
+ }
+
+ if (val != IMX208_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
+ IMX208_CHIP_ID, val);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops imx208_video_ops = {
+ .s_stream = imx208_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops imx208_pad_ops = {
+ .enum_mbus_code = imx208_enum_mbus_code,
+ .get_fmt = imx208_get_pad_format,
+ .set_fmt = imx208_set_pad_format,
+ .enum_frame_size = imx208_enum_frame_size,
+};
+
+static const struct v4l2_subdev_ops imx208_subdev_ops = {
+ .video = &imx208_video_ops,
+ .pad = &imx208_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops imx208_internal_ops = {
+ .open = imx208_open,
+};
+
+static int imx208_read_otp(struct imx208 *imx208)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ struct i2c_msg msgs[2];
+ u8 addr_buf[2] = { IMX208_OTP_BASE >> 8, IMX208_OTP_BASE & 0xff };
+ int ret = 0;
+
+ mutex_lock(&imx208->imx208_mx);
+
+ if (imx208->otp_read)
+ goto out_unlock;
+
+ ret = pm_runtime_get_sync(&client->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&client->dev);
+ goto out_unlock;
+ }
+
+ /* Write register address */
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = ARRAY_SIZE(addr_buf);
+ msgs[0].buf = addr_buf;
+
+ /* Read data from registers */
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = sizeof(imx208->otp_data);
+ msgs[1].buf = imx208->otp_data;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret == ARRAY_SIZE(msgs)) {
+ imx208->otp_read = true;
+ ret = 0;
+ }
+
+ pm_runtime_put(&client->dev);
+
+out_unlock:
+ mutex_unlock(&imx208->imx208_mx);
+
+ return ret;
+}
+
+static ssize_t otp_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(kobj_to_dev(kobj));
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct imx208 *imx208 = to_imx208(sd);
+ int ret;
+
+ ret = imx208_read_otp(imx208);
+ if (ret)
+ return ret;
+
+ memcpy(buf, &imx208->otp_data[off], count);
+ return count;
+}
+
+static const BIN_ATTR_RO(otp, IMX208_OTP_SIZE);
+
+/* Initialize control handlers */
+static int imx208_init_controls(struct imx208 *imx208)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ struct v4l2_ctrl_handler *ctrl_hdlr = &imx208->ctrl_handler;
+ s64 exposure_max;
+ s64 vblank_def;
+ s64 vblank_min;
+ s64 pixel_rate_min;
+ s64 pixel_rate_max;
+ int ret;
+
+ ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
+ if (ret)
+ return ret;
+
+ mutex_init(&imx208->imx208_mx);
+ ctrl_hdlr->lock = &imx208->imx208_mx;
+ imx208->link_freq =
+ v4l2_ctrl_new_int_menu(ctrl_hdlr,
+ &imx208_ctrl_ops,
+ V4L2_CID_LINK_FREQ,
+ ARRAY_SIZE(link_freq_menu_items) - 1,
+ 0, link_freq_menu_items);
+
+ if (imx208->link_freq)
+ imx208->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
+ pixel_rate_min =
+ link_freq_to_pixel_rate(link_freq_menu_items[ARRAY_SIZE(link_freq_menu_items) - 1]);
+ /* By default, PIXEL_RATE is read only */
+ imx208->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops,
+ V4L2_CID_PIXEL_RATE,
+ pixel_rate_min, pixel_rate_max,
+ 1, pixel_rate_max);
+
+ vblank_def = imx208->cur_mode->vts_def - imx208->cur_mode->height;
+ vblank_min = imx208->cur_mode->vts_min - imx208->cur_mode->height;
+ imx208->vblank =
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_VBLANK,
+ vblank_min,
+ IMX208_VTS_MAX - imx208->cur_mode->height, 1,
+ vblank_def);
+
+ imx208->hblank =
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_HBLANK,
+ IMX208_PPL_384MHZ - imx208->cur_mode->width,
+ IMX208_PPL_384MHZ - imx208->cur_mode->width,
+ 1,
+ IMX208_PPL_384MHZ - imx208->cur_mode->width);
+
+ if (imx208->hblank)
+ imx208->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ exposure_max = imx208->cur_mode->vts_def - 8;
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_EXPOSURE,
+ IMX208_EXPOSURE_MIN, exposure_max,
+ IMX208_EXPOSURE_STEP, IMX208_EXPOSURE_DEFAULT);
+
+ imx208->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ imx208->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+ IMX208_ANA_GAIN_MIN, IMX208_ANA_GAIN_MAX,
+ IMX208_ANA_GAIN_STEP, IMX208_ANA_GAIN_DEFAULT);
+
+ v4l2_ctrl_new_custom(ctrl_hdlr, &imx208_digital_gain_control, NULL);
+
+ v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx208_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(imx208_test_pattern_menu) - 1,
+ 0, 0, imx208_test_pattern_menu);
+
+ if (ctrl_hdlr->error) {
+ ret = ctrl_hdlr->error;
+ dev_err(&client->dev, "%s control init failed (%d)\n",
+ __func__, ret);
+ goto error;
+ }
+
+ imx208->sd.ctrl_handler = ctrl_hdlr;
+
+ return 0;
+
+error:
+ v4l2_ctrl_handler_free(ctrl_hdlr);
+ mutex_destroy(&imx208->imx208_mx);
+
+ return ret;
+}
+
+static void imx208_free_controls(struct imx208 *imx208)
+{
+ v4l2_ctrl_handler_free(imx208->sd.ctrl_handler);
+}
+
+static int imx208_probe(struct i2c_client *client)
+{
+ struct imx208 *imx208;
+ int ret;
+ u32 val = 0;
+
+ device_property_read_u32(&client->dev, "clock-frequency", &val);
+ if (val != 19200000) {
+ dev_err(&client->dev,
+ "Unsupported clock-frequency %u. Expected 19200000.\n",
+ val);
+ return -EINVAL;
+ }
+
+ imx208 = devm_kzalloc(&client->dev, sizeof(*imx208), GFP_KERNEL);
+ if (!imx208)
+ return -ENOMEM;
+
+ /* Initialize subdev */
+ v4l2_i2c_subdev_init(&imx208->sd, client, &imx208_subdev_ops);
+
+ /* Check module identity */
+ ret = imx208_identify_module(imx208);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ goto error_probe;
+ }
+
+ /* Set default mode to max resolution */
+ imx208->cur_mode = &supported_modes[0];
+
+ ret = imx208_init_controls(imx208);
+ if (ret) {
+ dev_err(&client->dev, "failed to init controls: %d", ret);
+ goto error_probe;
+ }
+
+ /* Initialize subdev */
+ imx208->sd.internal_ops = &imx208_internal_ops;
+ imx208->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ imx208->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ /* Initialize source pad */
+ imx208->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&imx208->sd.entity, 1, &imx208->pad);
+ if (ret) {
+ dev_err(&client->dev, "%s failed:%d\n", __func__, ret);
+ goto error_handler_free;
+ }
+
+ ret = v4l2_async_register_subdev_sensor(&imx208->sd);
+ if (ret < 0)
+ goto error_media_entity;
+
+ ret = device_create_bin_file(&client->dev, &bin_attr_otp);
+ if (ret) {
+ dev_err(&client->dev, "sysfs otp creation failed\n");
+ goto error_async_subdev;
+ }
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+ pm_runtime_idle(&client->dev);
+
+ return 0;
+
+error_async_subdev:
+ v4l2_async_unregister_subdev(&imx208->sd);
+
+error_media_entity:
+ media_entity_cleanup(&imx208->sd.entity);
+
+error_handler_free:
+ imx208_free_controls(imx208);
+
+error_probe:
+ mutex_destroy(&imx208->imx208_mx);
+
+ return ret;
+}
+
+static int imx208_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct imx208 *imx208 = to_imx208(sd);
+
+ device_remove_bin_file(&client->dev, &bin_attr_otp);
+ v4l2_async_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ imx208_free_controls(imx208);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ mutex_destroy(&imx208->imx208_mx);
+
+ return 0;
+}
+
+static const struct dev_pm_ops imx208_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(imx208_suspend, imx208_resume)
+};
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id imx208_acpi_ids[] = {
+ { "INT3478" },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(acpi, imx208_acpi_ids);
+#endif
+
+static struct i2c_driver imx208_i2c_driver = {
+ .driver = {
+ .name = "imx208",
+ .pm = &imx208_pm_ops,
+ .acpi_match_table = ACPI_PTR(imx208_acpi_ids),
+ },
+ .probe_new = imx208_probe,
+ .remove = imx208_remove,
+};
+
+module_i2c_driver(imx208_i2c_driver);
+
+MODULE_AUTHOR("Yeh, Andy <andy.yeh@intel.com>");
+MODULE_AUTHOR("Chen, Ping-chung <ping-chung.chen@intel.com>");
+MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>");
+MODULE_DESCRIPTION("Sony IMX208 sensor driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff