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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/i2c/imx208.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/i2c/imx208.c')
-rw-r--r-- | drivers/media/i2c/imx208.c | 1110 |
1 files changed, 1110 insertions, 0 deletions
diff --git a/drivers/media/i2c/imx208.c b/drivers/media/i2c/imx208.c new file mode 100644 index 000000000..a0e17bb9d --- /dev/null +++ b/drivers/media/i2c/imx208.c @@ -0,0 +1,1110 @@ +// 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]; + + /* True if the device has been identified */ + bool identified; +}; + +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->state, 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_state *sd_state, + 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_state *sd_state, + 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_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) + fmt->format = *v4l2_subdev_get_try_format(&imx208->sd, + sd_state, + 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_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct imx208 *imx208 = to_imx208(sd); + int ret; + + mutex_lock(&imx208->imx208_mx); + ret = __imx208_get_pad_format(imx208, sd_state, fmt); + mutex_unlock(&imx208->imx208_mx); + + return ret; +} + +static int imx208_set_pad_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + 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, sd_state, 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; +} + +static int imx208_identify_module(struct imx208 *imx208) +{ + struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd); + int ret; + u32 val; + + if (imx208->identified) + return 0; + + 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; + } + + imx208->identified = true; + + 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; + + ret = imx208_identify_module(imx208); + if (ret) + return ret; + + /* 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 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; + } + + ret = imx208_identify_module(imx208); + if (ret) + goto out_pm_put; + + /* 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; + } + +out_pm_put: + 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; + bool full_power; + 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); + + full_power = acpi_dev_state_d0(&client->dev); + if (full_power) { + /* 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; + } + + /* Set the device's state to active if it's in D0 state. */ + if (full_power) + 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 void 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); +} + +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, + .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE, +}; + +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"); |