// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019 Intel Corporation. #include #include #include #include #include #include #include #include #include #define OV8856_REG_VALUE_08BIT 1 #define OV8856_REG_VALUE_16BIT 2 #define OV8856_REG_VALUE_24BIT 3 #define OV8856_LINK_FREQ_360MHZ 360000000ULL #define OV8856_LINK_FREQ_180MHZ 180000000ULL #define OV8856_SCLK 144000000ULL #define OV8856_MCLK 19200000 #define OV8856_DATA_LANES 4 #define OV8856_RGB_DEPTH 10 #define OV8856_REG_CHIP_ID 0x300a #define OV8856_CHIP_ID 0x00885a #define OV8856_REG_MODE_SELECT 0x0100 #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 /* vertical-timings from sensor */ #define OV8856_REG_VTS 0x380e #define OV8856_VTS_MAX 0x7fff /* horizontal-timings from sensor */ #define OV8856_REG_HTS 0x380c /* Exposure controls from sensor */ #define OV8856_REG_EXPOSURE 0x3500 #define OV8856_EXPOSURE_MIN 6 #define OV8856_EXPOSURE_MAX_MARGIN 6 #define OV8856_EXPOSURE_STEP 1 /* Analog gain controls from sensor */ #define OV8856_REG_ANALOG_GAIN 0x3508 #define OV8856_ANAL_GAIN_MIN 128 #define OV8856_ANAL_GAIN_MAX 2047 #define OV8856_ANAL_GAIN_STEP 1 /* Digital gain controls from sensor */ #define OV8856_REG_MWB_R_GAIN 0x5019 #define OV8856_REG_MWB_G_GAIN 0x501b #define OV8856_REG_MWB_B_GAIN 0x501d #define OV8856_DGTL_GAIN_MIN 0 #define OV8856_DGTL_GAIN_MAX 4095 #define OV8856_DGTL_GAIN_STEP 1 #define OV8856_DGTL_GAIN_DEFAULT 1024 /* Test Pattern Control */ #define OV8856_REG_TEST_PATTERN 0x5e00 #define OV8856_TEST_PATTERN_ENABLE BIT(7) #define OV8856_TEST_PATTERN_BAR_SHIFT 2 #define to_ov8856(_sd) container_of(_sd, struct ov8856, sd) enum { OV8856_LINK_FREQ_720MBPS, OV8856_LINK_FREQ_360MBPS, }; struct ov8856_reg { u16 address; u8 val; }; struct ov8856_reg_list { u32 num_of_regs; const struct ov8856_reg *regs; }; struct ov8856_link_freq_config { const struct ov8856_reg_list reg_list; }; struct ov8856_mode { /* Frame width in pixels */ u32 width; /* Frame height in pixels */ u32 height; /* Horizontal timining size */ u32 hts; /* Default vertical timining size */ u32 vts_def; /* Min vertical timining size */ u32 vts_min; /* Link frequency needed for this resolution */ u32 link_freq_index; /* Sensor register settings for this resolution */ const struct ov8856_reg_list reg_list; }; static const struct ov8856_reg mipi_data_rate_720mbps[] = { {0x0103, 0x01}, {0x0100, 0x00}, {0x0302, 0x4b}, {0x0303, 0x01}, {0x030b, 0x02}, {0x030d, 0x4b}, {0x031e, 0x0c}, }; static const struct ov8856_reg mipi_data_rate_360mbps[] = { {0x0103, 0x01}, {0x0100, 0x00}, {0x0302, 0x4b}, {0x0303, 0x03}, {0x030b, 0x02}, {0x030d, 0x4b}, {0x031e, 0x0c}, }; static const struct ov8856_reg mode_3280x2464_regs[] = { {0x3000, 0x20}, {0x3003, 0x08}, {0x300e, 0x20}, {0x3010, 0x00}, {0x3015, 0x84}, {0x3018, 0x72}, {0x3021, 0x23}, {0x3033, 0x24}, {0x3500, 0x00}, {0x3501, 0x9a}, {0x3502, 0x20}, {0x3503, 0x08}, {0x3505, 0x83}, {0x3508, 0x01}, {0x3509, 0x80}, {0x350c, 0x00}, {0x350d, 0x80}, {0x350e, 0x04}, {0x350f, 0x00}, {0x3510, 0x00}, {0x3511, 0x02}, {0x3512, 0x00}, {0x3600, 0x72}, {0x3601, 0x40}, {0x3602, 0x30}, {0x3610, 0xc5}, {0x3611, 0x58}, {0x3612, 0x5c}, {0x3613, 0xca}, {0x3614, 0x20}, {0x3628, 0xff}, {0x3629, 0xff}, {0x362a, 0xff}, {0x3633, 0x10}, {0x3634, 0x10}, {0x3635, 0x10}, {0x3636, 0x10}, {0x3663, 0x08}, {0x3669, 0x34}, {0x366e, 0x10}, {0x3706, 0x86}, {0x370b, 0x7e}, {0x3714, 0x23}, {0x3730, 0x12}, {0x3733, 0x10}, {0x3764, 0x00}, {0x3765, 0x00}, {0x3769, 0x62}, {0x376a, 0x2a}, {0x376b, 0x30}, {0x3780, 0x00}, {0x3781, 0x24}, {0x3782, 0x00}, {0x3783, 0x23}, {0x3798, 0x2f}, {0x37a1, 0x60}, {0x37a8, 0x6a}, {0x37ab, 0x3f}, {0x37c2, 0x04}, {0x37c3, 0xf1}, {0x37c9, 0x80}, {0x37cb, 0x16}, {0x37cc, 0x16}, {0x37cd, 0x16}, {0x37ce, 0x16}, {0x3800, 0x00}, {0x3801, 0x00}, {0x3802, 0x00}, {0x3803, 0x06}, {0x3804, 0x0c}, {0x3805, 0xdf}, {0x3806, 0x09}, {0x3807, 0xa7}, {0x3808, 0x0c}, {0x3809, 0xd0}, {0x380a, 0x09}, {0x380b, 0xa0}, {0x380c, 0x07}, {0x380d, 0x88}, {0x380e, 0x09}, {0x380f, 0xb8}, {0x3810, 0x00}, {0x3811, 0x00}, {0x3812, 0x00}, {0x3813, 0x01}, {0x3814, 0x01}, {0x3815, 0x01}, {0x3816, 0x00}, {0x3817, 0x00}, {0x3818, 0x00}, {0x3819, 0x10}, {0x3820, 0x80}, {0x3821, 0x46}, {0x382a, 0x01}, {0x382b, 0x01}, {0x3830, 0x06}, {0x3836, 0x02}, {0x3862, 0x04}, {0x3863, 0x08}, {0x3cc0, 0x33}, {0x3d85, 0x17}, {0x3d8c, 0x73}, {0x3d8d, 0xde}, {0x4001, 0xe0}, {0x4003, 0x40}, {0x4008, 0x00}, {0x4009, 0x0b}, {0x400a, 0x00}, {0x400b, 0x84}, {0x400f, 0x80}, {0x4010, 0xf0}, {0x4011, 0xff}, {0x4012, 0x02}, {0x4013, 0x01}, {0x4014, 0x01}, {0x4015, 0x01}, {0x4042, 0x00}, {0x4043, 0x80}, {0x4044, 0x00}, {0x4045, 0x80}, {0x4046, 0x00}, {0x4047, 0x80}, {0x4048, 0x00}, {0x4049, 0x80}, {0x4041, 0x03}, {0x404c, 0x20}, {0x404d, 0x00}, {0x404e, 0x20}, {0x4203, 0x80}, {0x4307, 0x30}, {0x4317, 0x00}, {0x4503, 0x08}, {0x4601, 0x80}, {0x4800, 0x44}, {0x4816, 0x53}, {0x481b, 0x58}, {0x481f, 0x27}, {0x4837, 0x16}, {0x483c, 0x0f}, {0x484b, 0x05}, {0x5000, 0x57}, {0x5001, 0x0a}, {0x5004, 0x04}, {0x502e, 0x03}, {0x5030, 0x41}, {0x5780, 0x14}, {0x5781, 0x0f}, {0x5782, 0x44}, {0x5783, 0x02}, {0x5784, 0x01}, {0x5785, 0x01}, {0x5786, 0x00}, {0x5787, 0x04}, {0x5788, 0x02}, {0x5789, 0x0f}, {0x578a, 0xfd}, {0x578b, 0xf5}, {0x578c, 0xf5}, {0x578d, 0x03}, {0x578e, 0x08}, {0x578f, 0x0c}, {0x5790, 0x08}, {0x5791, 0x04}, {0x5792, 0x00}, {0x5793, 0x52}, {0x5794, 0xa3}, {0x5795, 0x02}, {0x5796, 0x20}, {0x5797, 0x20}, {0x5798, 0xd5}, {0x5799, 0xd5}, {0x579a, 0x00}, {0x579b, 0x50}, {0x579c, 0x00}, {0x579d, 0x2c}, {0x579e, 0x0c}, {0x579f, 0x40}, {0x57a0, 0x09}, {0x57a1, 0x40}, {0x59f8, 0x3d}, {0x5a08, 0x02}, {0x5b00, 0x02}, {0x5b01, 0x10}, {0x5b02, 0x03}, {0x5b03, 0xcf}, {0x5b05, 0x6c}, {0x5e00, 0x00} }; static const struct ov8856_reg mode_1640x1232_regs[] = { {0x3000, 0x20}, {0x3003, 0x08}, {0x300e, 0x20}, {0x3010, 0x00}, {0x3015, 0x84}, {0x3018, 0x72}, {0x3021, 0x23}, {0x3033, 0x24}, {0x3500, 0x00}, {0x3501, 0x4c}, {0x3502, 0xe0}, {0x3503, 0x08}, {0x3505, 0x83}, {0x3508, 0x01}, {0x3509, 0x80}, {0x350c, 0x00}, {0x350d, 0x80}, {0x350e, 0x04}, {0x350f, 0x00}, {0x3510, 0x00}, {0x3511, 0x02}, {0x3512, 0x00}, {0x3600, 0x72}, {0x3601, 0x40}, {0x3602, 0x30}, {0x3610, 0xc5}, {0x3611, 0x58}, {0x3612, 0x5c}, {0x3613, 0xca}, {0x3614, 0x20}, {0x3628, 0xff}, {0x3629, 0xff}, {0x362a, 0xff}, {0x3633, 0x10}, {0x3634, 0x10}, {0x3635, 0x10}, {0x3636, 0x10}, {0x3663, 0x08}, {0x3669, 0x34}, {0x366e, 0x08}, {0x3706, 0x86}, {0x370b, 0x7e}, {0x3714, 0x27}, {0x3730, 0x12}, {0x3733, 0x10}, {0x3764, 0x00}, {0x3765, 0x00}, {0x3769, 0x62}, {0x376a, 0x2a}, {0x376b, 0x30}, {0x3780, 0x00}, {0x3781, 0x24}, {0x3782, 0x00}, {0x3783, 0x23}, {0x3798, 0x2f}, {0x37a1, 0x60}, {0x37a8, 0x6a}, {0x37ab, 0x3f}, {0x37c2, 0x14}, {0x37c3, 0xf1}, {0x37c9, 0x80}, {0x37cb, 0x16}, {0x37cc, 0x16}, {0x37cd, 0x16}, {0x37ce, 0x16}, {0x3800, 0x00}, {0x3801, 0x00}, {0x3802, 0x00}, {0x3803, 0x06}, {0x3804, 0x0c}, {0x3805, 0xdf}, {0x3806, 0x09}, {0x3807, 0xa7}, {0x3808, 0x06}, {0x3809, 0x68}, {0x380a, 0x04}, {0x380b, 0xd0}, {0x380c, 0x0e}, {0x380d, 0xec}, {0x380e, 0x04}, {0x380f, 0xe8}, {0x3810, 0x00}, {0x3811, 0x00}, {0x3812, 0x00}, {0x3813, 0x01}, {0x3814, 0x03}, {0x3815, 0x01}, {0x3816, 0x00}, {0x3817, 0x00}, {0x3818, 0x00}, {0x3819, 0x10}, {0x3820, 0x90}, {0x3821, 0x67}, {0x382a, 0x03}, {0x382b, 0x01}, {0x3830, 0x06}, {0x3836, 0x02}, {0x3862, 0x04}, {0x3863, 0x08}, {0x3cc0, 0x33}, {0x3d85, 0x17}, {0x3d8c, 0x73}, {0x3d8d, 0xde}, {0x4001, 0xe0}, {0x4003, 0x40}, {0x4008, 0x00}, {0x4009, 0x05}, {0x400a, 0x00}, {0x400b, 0x84}, {0x400f, 0x80}, {0x4010, 0xf0}, {0x4011, 0xff}, {0x4012, 0x02}, {0x4013, 0x01}, {0x4014, 0x01}, {0x4015, 0x01}, {0x4042, 0x00}, {0x4043, 0x80}, {0x4044, 0x00}, {0x4045, 0x80}, {0x4046, 0x00}, {0x4047, 0x80}, {0x4048, 0x00}, {0x4049, 0x80}, {0x4041, 0x03}, {0x404c, 0x20}, {0x404d, 0x00}, {0x404e, 0x20}, {0x4203, 0x80}, {0x4307, 0x30}, {0x4317, 0x00}, {0x4503, 0x08}, {0x4601, 0x80}, {0x4800, 0x44}, {0x4816, 0x53}, {0x481b, 0x58}, {0x481f, 0x27}, {0x4837, 0x16}, {0x483c, 0x0f}, {0x484b, 0x05}, {0x5000, 0x57}, {0x5001, 0x0a}, {0x5004, 0x04}, {0x502e, 0x03}, {0x5030, 0x41}, {0x5780, 0x14}, {0x5781, 0x0f}, {0x5782, 0x44}, {0x5783, 0x02}, {0x5784, 0x01}, {0x5785, 0x01}, {0x5786, 0x00}, {0x5787, 0x04}, {0x5788, 0x02}, {0x5789, 0x0f}, {0x578a, 0xfd}, {0x578b, 0xf5}, {0x578c, 0xf5}, {0x578d, 0x03}, {0x578e, 0x08}, {0x578f, 0x0c}, {0x5790, 0x08}, {0x5791, 0x04}, {0x5792, 0x00}, {0x5793, 0x52}, {0x5794, 0xa3}, {0x5795, 0x00}, {0x5796, 0x10}, {0x5797, 0x10}, {0x5798, 0x73}, {0x5799, 0x73}, {0x579a, 0x00}, {0x579b, 0x28}, {0x579c, 0x00}, {0x579d, 0x16}, {0x579e, 0x06}, {0x579f, 0x20}, {0x57a0, 0x04}, {0x57a1, 0xa0}, {0x59f8, 0x3d}, {0x5a08, 0x02}, {0x5b00, 0x02}, {0x5b01, 0x10}, {0x5b02, 0x03}, {0x5b03, 0xcf}, {0x5b05, 0x6c}, {0x5e00, 0x00} }; static const char * const ov8856_test_pattern_menu[] = { "Disabled", "Standard Color Bar", "Top-Bottom Darker Color Bar", "Right-Left Darker Color Bar", "Bottom-Top Darker Color Bar" }; static const s64 link_freq_menu_items[] = { OV8856_LINK_FREQ_360MHZ, OV8856_LINK_FREQ_180MHZ }; static const struct ov8856_link_freq_config link_freq_configs[] = { [OV8856_LINK_FREQ_720MBPS] = { .reg_list = { .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps), .regs = mipi_data_rate_720mbps, } }, [OV8856_LINK_FREQ_360MBPS] = { .reg_list = { .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps), .regs = mipi_data_rate_360mbps, } } }; static const struct ov8856_mode supported_modes[] = { { .width = 3280, .height = 2464, .hts = 1928, .vts_def = 2488, .vts_min = 2488, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs), .regs = mode_3280x2464_regs, }, .link_freq_index = OV8856_LINK_FREQ_720MBPS, }, { .width = 1640, .height = 1232, .hts = 3820, .vts_def = 1256, .vts_min = 1256, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_1640x1232_regs), .regs = mode_1640x1232_regs, }, .link_freq_index = OV8856_LINK_FREQ_360MBPS, } }; struct ov8856 { 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 *exposure; /* Current mode */ const struct ov8856_mode *cur_mode; /* To serialize asynchronus callbacks */ struct mutex mutex; /* Streaming on/off */ bool streaming; }; static u64 to_pixel_rate(u32 f_index) { u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV8856_DATA_LANES; do_div(pixel_rate, OV8856_RGB_DEPTH); return pixel_rate; } static u64 to_pixels_per_line(u32 hts, u32 f_index) { u64 ppl = hts * to_pixel_rate(f_index); do_div(ppl, OV8856_SCLK); return ppl; } static int ov8856_read_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 *val) { struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); struct i2c_msg msgs[2]; u8 addr_buf[2]; u8 data_buf[4] = {0}; int ret; if (len > 4) return -EINVAL; put_unaligned_be16(reg, addr_buf); msgs[0].addr = client->addr; msgs[0].flags = 0; msgs[0].len = sizeof(addr_buf); msgs[0].buf = addr_buf; 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; } static int ov8856_write_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 val) { struct i2c_client *client = v4l2_get_subdevdata(&ov8856->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; } static int ov8856_write_reg_list(struct ov8856 *ov8856, const struct ov8856_reg_list *r_list) { struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); unsigned int i; int ret; for (i = 0; i < r_list->num_of_regs; i++) { ret = ov8856_write_reg(ov8856, r_list->regs[i].address, 1, r_list->regs[i].val); if (ret) { dev_err_ratelimited(&client->dev, "failed to write reg 0x%4.4x. error = %d", r_list->regs[i].address, ret); return ret; } } return 0; } static int ov8856_update_digital_gain(struct ov8856 *ov8856, u32 d_gain) { int ret; ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_R_GAIN, OV8856_REG_VALUE_16BIT, d_gain); if (ret) return ret; ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_G_GAIN, OV8856_REG_VALUE_16BIT, d_gain); if (ret) return ret; return ov8856_write_reg(ov8856, OV8856_REG_MWB_B_GAIN, OV8856_REG_VALUE_16BIT, d_gain); } static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern) { if (pattern) pattern = (pattern - 1) << OV8856_TEST_PATTERN_BAR_SHIFT | OV8856_TEST_PATTERN_ENABLE; return ov8856_write_reg(ov8856, OV8856_REG_TEST_PATTERN, OV8856_REG_VALUE_08BIT, pattern); } static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl) { struct ov8856 *ov8856 = container_of(ctrl->handler, struct ov8856, ctrl_handler); struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); s64 exposure_max; int ret = 0; /* Propagate change of current control to all related controls */ if (ctrl->id == V4L2_CID_VBLANK) { /* Update max exposure while meeting expected vblanking */ exposure_max = ov8856->cur_mode->height + ctrl->val - OV8856_EXPOSURE_MAX_MARGIN; __v4l2_ctrl_modify_range(ov8856->exposure, ov8856->exposure->minimum, exposure_max, ov8856->exposure->step, exposure_max); } /* V4L2 controls values will be applied only when power is already up */ if (!pm_runtime_get_if_in_use(&client->dev)) return 0; switch (ctrl->id) { case V4L2_CID_ANALOGUE_GAIN: ret = ov8856_write_reg(ov8856, OV8856_REG_ANALOG_GAIN, OV8856_REG_VALUE_16BIT, ctrl->val); break; case V4L2_CID_DIGITAL_GAIN: ret = ov8856_update_digital_gain(ov8856, ctrl->val); break; case V4L2_CID_EXPOSURE: /* 4 least significant bits of expsoure are fractional part */ ret = ov8856_write_reg(ov8856, OV8856_REG_EXPOSURE, OV8856_REG_VALUE_24BIT, ctrl->val << 4); break; case V4L2_CID_VBLANK: ret = ov8856_write_reg(ov8856, OV8856_REG_VTS, OV8856_REG_VALUE_16BIT, ov8856->cur_mode->height + ctrl->val); break; case V4L2_CID_TEST_PATTERN: ret = ov8856_test_pattern(ov8856, ctrl->val); break; default: ret = -EINVAL; break; } pm_runtime_put(&client->dev); return ret; } static const struct v4l2_ctrl_ops ov8856_ctrl_ops = { .s_ctrl = ov8856_set_ctrl, }; static int ov8856_init_controls(struct ov8856 *ov8856) { struct v4l2_ctrl_handler *ctrl_hdlr; s64 exposure_max, h_blank; int ret; ctrl_hdlr = &ov8856->ctrl_handler; ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8); if (ret) return ret; ctrl_hdlr->lock = &ov8856->mutex; ov8856->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_LINK_FREQ, ARRAY_SIZE(link_freq_menu_items) - 1, 0, link_freq_menu_items); if (ov8856->link_freq) ov8856->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; ov8856->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_PIXEL_RATE, 0, to_pixel_rate(OV8856_LINK_FREQ_720MBPS), 1, to_pixel_rate(OV8856_LINK_FREQ_720MBPS)); ov8856->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_VBLANK, ov8856->cur_mode->vts_min - ov8856->cur_mode->height, OV8856_VTS_MAX - ov8856->cur_mode->height, 1, ov8856->cur_mode->vts_def - ov8856->cur_mode->height); h_blank = to_pixels_per_line(ov8856->cur_mode->hts, ov8856->cur_mode->link_freq_index) - ov8856->cur_mode->width; ov8856->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_HBLANK, h_blank, h_blank, 1, h_blank); if (ov8856->hblank) ov8856->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, OV8856_ANAL_GAIN_MIN, OV8856_ANAL_GAIN_MAX, OV8856_ANAL_GAIN_STEP, OV8856_ANAL_GAIN_MIN); v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_DIGITAL_GAIN, OV8856_DGTL_GAIN_MIN, OV8856_DGTL_GAIN_MAX, OV8856_DGTL_GAIN_STEP, OV8856_DGTL_GAIN_DEFAULT); exposure_max = ov8856->cur_mode->vts_def - OV8856_EXPOSURE_MAX_MARGIN; ov8856->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_EXPOSURE, OV8856_EXPOSURE_MIN, exposure_max, OV8856_EXPOSURE_STEP, exposure_max); v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_TEST_PATTERN, ARRAY_SIZE(ov8856_test_pattern_menu) - 1, 0, 0, ov8856_test_pattern_menu); if (ctrl_hdlr->error) return ctrl_hdlr->error; ov8856->sd.ctrl_handler = ctrl_hdlr; return 0; } static void ov8856_update_pad_format(const struct ov8856_mode *mode, struct v4l2_mbus_framefmt *fmt) { fmt->width = mode->width; fmt->height = mode->height; fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; fmt->field = V4L2_FIELD_NONE; } static int ov8856_start_streaming(struct ov8856 *ov8856) { struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); const struct ov8856_reg_list *reg_list; int link_freq_index, ret; link_freq_index = ov8856->cur_mode->link_freq_index; reg_list = &link_freq_configs[link_freq_index].reg_list; ret = ov8856_write_reg_list(ov8856, reg_list); if (ret) { dev_err(&client->dev, "failed to set plls"); return ret; } reg_list = &ov8856->cur_mode->reg_list; ret = ov8856_write_reg_list(ov8856, reg_list); if (ret) { dev_err(&client->dev, "failed to set mode"); return ret; } ret = __v4l2_ctrl_handler_setup(ov8856->sd.ctrl_handler); if (ret) return ret; ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); if (ret) { dev_err(&client->dev, "failed to set stream"); return ret; } return 0; } static void ov8856_stop_streaming(struct ov8856 *ov8856) { struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); if (ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY)) dev_err(&client->dev, "failed to set stream"); } static int ov8856_set_stream(struct v4l2_subdev *sd, int enable) { struct ov8856 *ov8856 = to_ov8856(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; if (ov8856->streaming == enable) return 0; mutex_lock(&ov8856->mutex); if (enable) { ret = pm_runtime_get_sync(&client->dev); if (ret < 0) { pm_runtime_put_noidle(&client->dev); mutex_unlock(&ov8856->mutex); return ret; } ret = ov8856_start_streaming(ov8856); if (ret) { enable = 0; ov8856_stop_streaming(ov8856); pm_runtime_put(&client->dev); } } else { ov8856_stop_streaming(ov8856); pm_runtime_put(&client->dev); } ov8856->streaming = enable; mutex_unlock(&ov8856->mutex); return ret; } static int __maybe_unused ov8856_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov8856 *ov8856 = to_ov8856(sd); mutex_lock(&ov8856->mutex); if (ov8856->streaming) ov8856_stop_streaming(ov8856); mutex_unlock(&ov8856->mutex); return 0; } static int __maybe_unused ov8856_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov8856 *ov8856 = to_ov8856(sd); int ret; mutex_lock(&ov8856->mutex); if (ov8856->streaming) { ret = ov8856_start_streaming(ov8856); if (ret) { ov8856->streaming = false; ov8856_stop_streaming(ov8856); mutex_unlock(&ov8856->mutex); return ret; } } mutex_unlock(&ov8856->mutex); return 0; } static int ov8856_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct ov8856 *ov8856 = to_ov8856(sd); const struct ov8856_mode *mode; s32 vblank_def, h_blank; mode = v4l2_find_nearest_size(supported_modes, ARRAY_SIZE(supported_modes), width, height, fmt->format.width, fmt->format.height); mutex_lock(&ov8856->mutex); ov8856_update_pad_format(mode, &fmt->format); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; } else { ov8856->cur_mode = mode; __v4l2_ctrl_s_ctrl(ov8856->link_freq, mode->link_freq_index); __v4l2_ctrl_s_ctrl_int64(ov8856->pixel_rate, to_pixel_rate(mode->link_freq_index)); /* Update limits and set FPS to default */ vblank_def = mode->vts_def - mode->height; __v4l2_ctrl_modify_range(ov8856->vblank, mode->vts_min - mode->height, OV8856_VTS_MAX - mode->height, 1, vblank_def); __v4l2_ctrl_s_ctrl(ov8856->vblank, vblank_def); h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) - mode->width; __v4l2_ctrl_modify_range(ov8856->hblank, h_blank, h_blank, 1, h_blank); } mutex_unlock(&ov8856->mutex); return 0; } static int ov8856_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct ov8856 *ov8856 = to_ov8856(sd); mutex_lock(&ov8856->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) fmt->format = *v4l2_subdev_get_try_format(&ov8856->sd, cfg, fmt->pad); else ov8856_update_pad_format(ov8856->cur_mode, &fmt->format); mutex_unlock(&ov8856->mutex); return 0; } static int ov8856_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { /* Only one bayer order GRBG is supported */ if (code->index > 0) return -EINVAL; code->code = MEDIA_BUS_FMT_SGRBG10_1X10; return 0; } static int ov8856_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { if (fse->index >= ARRAY_SIZE(supported_modes)) return -EINVAL; if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10) return -EINVAL; fse->min_width = supported_modes[fse->index].width; fse->max_width = fse->min_width; fse->min_height = supported_modes[fse->index].height; fse->max_height = fse->min_height; return 0; } static int ov8856_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct ov8856 *ov8856 = to_ov8856(sd); mutex_lock(&ov8856->mutex); ov8856_update_pad_format(&supported_modes[0], v4l2_subdev_get_try_format(sd, fh->pad, 0)); mutex_unlock(&ov8856->mutex); return 0; } static const struct v4l2_subdev_video_ops ov8856_video_ops = { .s_stream = ov8856_set_stream, }; static const struct v4l2_subdev_pad_ops ov8856_pad_ops = { .set_fmt = ov8856_set_format, .get_fmt = ov8856_get_format, .enum_mbus_code = ov8856_enum_mbus_code, .enum_frame_size = ov8856_enum_frame_size, }; static const struct v4l2_subdev_ops ov8856_subdev_ops = { .video = &ov8856_video_ops, .pad = &ov8856_pad_ops, }; static const struct media_entity_operations ov8856_subdev_entity_ops = { .link_validate = v4l2_subdev_link_validate, }; static const struct v4l2_subdev_internal_ops ov8856_internal_ops = { .open = ov8856_open, }; static int ov8856_identify_module(struct ov8856 *ov8856) { struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); int ret; u32 val; ret = ov8856_read_reg(ov8856, OV8856_REG_CHIP_ID, OV8856_REG_VALUE_24BIT, &val); if (ret) return ret; if (val != OV8856_CHIP_ID) { dev_err(&client->dev, "chip id mismatch: %x!=%x", OV8856_CHIP_ID, val); return -ENXIO; } return 0; } static int ov8856_check_hwcfg(struct device *dev) { struct fwnode_handle *ep; struct fwnode_handle *fwnode = dev_fwnode(dev); struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = V4L2_MBUS_CSI2_DPHY }; u32 mclk; int ret; unsigned int i, j; if (!fwnode) return -ENXIO; fwnode_property_read_u32(fwnode, "clock-frequency", &mclk); if (mclk != OV8856_MCLK) { dev_err(dev, "external clock %d is not supported", mclk); return -EINVAL; } ep = fwnode_graph_get_next_endpoint(fwnode, NULL); if (!ep) return -ENXIO; ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); fwnode_handle_put(ep); if (ret) return ret; if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV8856_DATA_LANES) { dev_err(dev, "number of CSI2 data lanes %d is not supported", bus_cfg.bus.mipi_csi2.num_data_lanes); ret = -EINVAL; goto check_hwcfg_error; } if (!bus_cfg.nr_of_link_frequencies) { dev_err(dev, "no link frequencies defined"); ret = -EINVAL; goto check_hwcfg_error; } for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { if (link_freq_menu_items[i] == bus_cfg.link_frequencies[j]) break; } if (j == bus_cfg.nr_of_link_frequencies) { dev_err(dev, "no link frequency %lld supported", link_freq_menu_items[i]); ret = -EINVAL; goto check_hwcfg_error; } } check_hwcfg_error: v4l2_fwnode_endpoint_free(&bus_cfg); return ret; } static int ov8856_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov8856 *ov8856 = to_ov8856(sd); v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); v4l2_ctrl_handler_free(sd->ctrl_handler); pm_runtime_disable(&client->dev); mutex_destroy(&ov8856->mutex); return 0; } static int ov8856_probe(struct i2c_client *client) { struct ov8856 *ov8856; int ret; ret = ov8856_check_hwcfg(&client->dev); if (ret) { dev_err(&client->dev, "failed to check HW configuration: %d", ret); return ret; } ov8856 = devm_kzalloc(&client->dev, sizeof(*ov8856), GFP_KERNEL); if (!ov8856) return -ENOMEM; v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops); ret = ov8856_identify_module(ov8856); if (ret) { dev_err(&client->dev, "failed to find sensor: %d", ret); return ret; } mutex_init(&ov8856->mutex); ov8856->cur_mode = &supported_modes[0]; ret = ov8856_init_controls(ov8856); if (ret) { dev_err(&client->dev, "failed to init controls: %d", ret); goto probe_error_v4l2_ctrl_handler_free; } ov8856->sd.internal_ops = &ov8856_internal_ops; ov8856->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; ov8856->sd.entity.ops = &ov8856_subdev_entity_ops; ov8856->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; ov8856->pad.flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_pads_init(&ov8856->sd.entity, 1, &ov8856->pad); if (ret) { dev_err(&client->dev, "failed to init entity pads: %d", ret); goto probe_error_v4l2_ctrl_handler_free; } ret = v4l2_async_register_subdev_sensor_common(&ov8856->sd); if (ret < 0) { dev_err(&client->dev, "failed to register V4L2 subdev: %d", ret); goto probe_error_media_entity_cleanup; } /* * Device is already turned on by i2c-core with ACPI domain PM. * Enable runtime PM and turn off the device. */ pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); pm_runtime_idle(&client->dev); return 0; probe_error_media_entity_cleanup: media_entity_cleanup(&ov8856->sd.entity); probe_error_v4l2_ctrl_handler_free: v4l2_ctrl_handler_free(ov8856->sd.ctrl_handler); mutex_destroy(&ov8856->mutex); return ret; } static const struct dev_pm_ops ov8856_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(ov8856_suspend, ov8856_resume) }; #ifdef CONFIG_ACPI static const struct acpi_device_id ov8856_acpi_ids[] = { {"OVTI8856"}, {} }; MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids); #endif static struct i2c_driver ov8856_i2c_driver = { .driver = { .name = "ov8856", .pm = &ov8856_pm_ops, .acpi_match_table = ACPI_PTR(ov8856_acpi_ids), }, .probe_new = ov8856_probe, .remove = ov8856_remove, }; module_i2c_driver(ov8856_i2c_driver); MODULE_AUTHOR("Ben Kao "); MODULE_DESCRIPTION("OmniVision OV8856 sensor driver"); MODULE_LICENSE("GPL v2");