diff options
Diffstat (limited to 'drivers/media/i2c/ov5675.c')
| -rw-r--r-- | drivers/media/i2c/ov5675.c | 1447 |
1 files changed, 1447 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov5675.c b/drivers/media/i2c/ov5675.c new file mode 100644 index 0000000000..d5a2a5f823 --- /dev/null +++ b/drivers/media/i2c/ov5675.c @@ -0,0 +1,1447 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Intel Corporation. + +#include <asm/unaligned.h> +#include <linux/acpi.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-fwnode.h> + +#define OV5675_REG_VALUE_08BIT 1 +#define OV5675_REG_VALUE_16BIT 2 +#define OV5675_REG_VALUE_24BIT 3 + +#define OV5675_LINK_FREQ_450MHZ 450000000ULL +#define OV5675_SCLK 90000000LL +#define OV5675_XVCLK_19_2 19200000 +#define OV5675_DATA_LANES 2 +#define OV5675_RGB_DEPTH 10 + +#define OV5675_REG_CHIP_ID 0x300a +#define OV5675_CHIP_ID 0x5675 + +#define OV5675_REG_MODE_SELECT 0x0100 +#define OV5675_MODE_STANDBY 0x00 +#define OV5675_MODE_STREAMING 0x01 + +/* vertical-timings from sensor */ +#define OV5675_REG_VTS 0x380e +#define OV5675_VTS_30FPS 0x07e4 +#define OV5675_VTS_30FPS_MIN 0x07e4 +#define OV5675_VTS_MAX 0x7fff + +/* horizontal-timings from sensor */ +#define OV5675_REG_HTS 0x380c + +/* Exposure controls from sensor */ +#define OV5675_REG_EXPOSURE 0x3500 +#define OV5675_EXPOSURE_MIN 4 +#define OV5675_EXPOSURE_MAX_MARGIN 4 +#define OV5675_EXPOSURE_STEP 1 + +/* Analog gain controls from sensor */ +#define OV5675_REG_ANALOG_GAIN 0x3508 +#define OV5675_ANAL_GAIN_MIN 128 +#define OV5675_ANAL_GAIN_MAX 2047 +#define OV5675_ANAL_GAIN_STEP 1 + +/* Digital gain controls from sensor */ +#define OV5675_REG_DIGITAL_GAIN 0x350a +#define OV5675_REG_MWB_R_GAIN 0x5019 +#define OV5675_REG_MWB_G_GAIN 0x501b +#define OV5675_REG_MWB_B_GAIN 0x501d +#define OV5675_DGTL_GAIN_MIN 1024 +#define OV5675_DGTL_GAIN_MAX 4095 +#define OV5675_DGTL_GAIN_STEP 1 +#define OV5675_DGTL_GAIN_DEFAULT 1024 + +/* Group Access */ +#define OV5675_REG_GROUP_ACCESS 0x3208 +#define OV5675_GROUP_HOLD_START 0x0 +#define OV5675_GROUP_HOLD_END 0x10 +#define OV5675_GROUP_HOLD_LAUNCH 0xa0 + +/* Test Pattern Control */ +#define OV5675_REG_TEST_PATTERN 0x4503 +#define OV5675_TEST_PATTERN_ENABLE BIT(7) +#define OV5675_TEST_PATTERN_BAR_SHIFT 2 + +/* Flip Mirror Controls from sensor */ +#define OV5675_REG_FORMAT1 0x3820 +#define OV5675_REG_FORMAT2 0x373d + +#define to_ov5675(_sd) container_of(_sd, struct ov5675, sd) + +static const char * const ov5675_supply_names[] = { + "avdd", /* Analog power */ + "dovdd", /* Digital I/O power */ + "dvdd", /* Digital core power */ +}; + +#define OV5675_NUM_SUPPLIES ARRAY_SIZE(ov5675_supply_names) + +enum { + OV5675_LINK_FREQ_900MBPS, +}; + +struct ov5675_reg { + u16 address; + u8 val; +}; + +struct ov5675_reg_list { + u32 num_of_regs; + const struct ov5675_reg *regs; +}; + +struct ov5675_link_freq_config { + const struct ov5675_reg_list reg_list; +}; + +struct ov5675_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 ov5675_reg_list reg_list; +}; + +static const struct ov5675_reg mipi_data_rate_900mbps[] = { + {0x0103, 0x01}, + {0x0100, 0x00}, + {0x0300, 0x04}, + {0x0302, 0x8d}, + {0x0303, 0x00}, + {0x030d, 0x26}, +}; + +static const struct ov5675_reg mode_2592x1944_regs[] = { + {0x3002, 0x21}, + {0x3107, 0x23}, + {0x3501, 0x20}, + {0x3503, 0x0c}, + {0x3508, 0x03}, + {0x3509, 0x00}, + {0x3600, 0x66}, + {0x3602, 0x30}, + {0x3610, 0xa5}, + {0x3612, 0x93}, + {0x3620, 0x80}, + {0x3642, 0x0e}, + {0x3661, 0x00}, + {0x3662, 0x10}, + {0x3664, 0xf3}, + {0x3665, 0x9e}, + {0x3667, 0xa5}, + {0x366e, 0x55}, + {0x366f, 0x55}, + {0x3670, 0x11}, + {0x3671, 0x11}, + {0x3672, 0x11}, + {0x3673, 0x11}, + {0x3714, 0x24}, + {0x371a, 0x3e}, + {0x3733, 0x10}, + {0x3734, 0x00}, + {0x373d, 0x24}, + {0x3764, 0x20}, + {0x3765, 0x20}, + {0x3766, 0x12}, + {0x37a1, 0x14}, + {0x37a8, 0x1c}, + {0x37ab, 0x0f}, + {0x37c2, 0x04}, + {0x37cb, 0x00}, + {0x37cc, 0x00}, + {0x37cd, 0x00}, + {0x37ce, 0x00}, + {0x37d8, 0x02}, + {0x37d9, 0x08}, + {0x37dc, 0x04}, + {0x3800, 0x00}, + {0x3801, 0x00}, + {0x3802, 0x00}, + {0x3803, 0x04}, + {0x3804, 0x0a}, + {0x3805, 0x3f}, + {0x3806, 0x07}, + {0x3807, 0xb3}, + {0x3808, 0x0a}, + {0x3809, 0x20}, + {0x380a, 0x07}, + {0x380b, 0x98}, + {0x380c, 0x02}, + {0x380d, 0xee}, + {0x380e, 0x07}, + {0x380f, 0xe4}, + {0x3811, 0x10}, + {0x3813, 0x0d}, + {0x3814, 0x01}, + {0x3815, 0x01}, + {0x3816, 0x01}, + {0x3817, 0x01}, + {0x381e, 0x02}, + {0x3820, 0x88}, + {0x3821, 0x01}, + {0x3832, 0x04}, + {0x3c80, 0x01}, + {0x3c82, 0x00}, + {0x3c83, 0xc8}, + {0x3c8c, 0x0f}, + {0x3c8d, 0xa0}, + {0x3c90, 0x07}, + {0x3c91, 0x00}, + {0x3c92, 0x00}, + {0x3c93, 0x00}, + {0x3c94, 0xd0}, + {0x3c95, 0x50}, + {0x3c96, 0x35}, + {0x3c97, 0x00}, + {0x4001, 0xe0}, + {0x4008, 0x02}, + {0x4009, 0x0d}, + {0x400f, 0x80}, + {0x4013, 0x02}, + {0x4040, 0x00}, + {0x4041, 0x07}, + {0x404c, 0x50}, + {0x404e, 0x20}, + {0x4500, 0x06}, + {0x4503, 0x00}, + {0x450a, 0x04}, + {0x4809, 0x04}, + {0x480c, 0x12}, + {0x4819, 0x70}, + {0x4825, 0x32}, + {0x4826, 0x32}, + {0x482a, 0x06}, + {0x4833, 0x08}, + {0x4837, 0x0d}, + {0x5000, 0x77}, + {0x5b00, 0x01}, + {0x5b01, 0x10}, + {0x5b02, 0x01}, + {0x5b03, 0xdb}, + {0x5b05, 0x6c}, + {0x5e10, 0xfc}, + {0x3500, 0x00}, + {0x3501, 0x3E}, + {0x3502, 0x60}, + {0x3503, 0x08}, + {0x3508, 0x04}, + {0x3509, 0x00}, + {0x3832, 0x48}, + {0x5780, 0x3e}, + {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, 0x06}, + {0x5792, 0x00}, + {0x5793, 0x52}, + {0x5794, 0xa3}, + {0x4003, 0x40}, + {0x3107, 0x01}, + {0x3c80, 0x08}, + {0x3c83, 0xb1}, + {0x3c8c, 0x10}, + {0x3c8d, 0x00}, + {0x3c90, 0x00}, + {0x3c94, 0x00}, + {0x3c95, 0x00}, + {0x3c96, 0x00}, + {0x37cb, 0x09}, + {0x37cc, 0x15}, + {0x37cd, 0x1f}, + {0x37ce, 0x1f}, +}; + +static const struct ov5675_reg mode_1296x972_regs[] = { + {0x3002, 0x21}, + {0x3107, 0x23}, + {0x3501, 0x20}, + {0x3503, 0x0c}, + {0x3508, 0x03}, + {0x3509, 0x00}, + {0x3600, 0x66}, + {0x3602, 0x30}, + {0x3610, 0xa5}, + {0x3612, 0x93}, + {0x3620, 0x80}, + {0x3642, 0x0e}, + {0x3661, 0x00}, + {0x3662, 0x08}, + {0x3664, 0xf3}, + {0x3665, 0x9e}, + {0x3667, 0xa5}, + {0x366e, 0x55}, + {0x366f, 0x55}, + {0x3670, 0x11}, + {0x3671, 0x11}, + {0x3672, 0x11}, + {0x3673, 0x11}, + {0x3714, 0x28}, + {0x371a, 0x3e}, + {0x3733, 0x10}, + {0x3734, 0x00}, + {0x373d, 0x24}, + {0x3764, 0x20}, + {0x3765, 0x20}, + {0x3766, 0x12}, + {0x37a1, 0x14}, + {0x37a8, 0x1c}, + {0x37ab, 0x0f}, + {0x37c2, 0x14}, + {0x37cb, 0x00}, + {0x37cc, 0x00}, + {0x37cd, 0x00}, + {0x37ce, 0x00}, + {0x37d8, 0x02}, + {0x37d9, 0x04}, + {0x37dc, 0x04}, + {0x3800, 0x00}, + {0x3801, 0x00}, + {0x3802, 0x00}, + {0x3803, 0x00}, + {0x3804, 0x0a}, + {0x3805, 0x3f}, + {0x3806, 0x07}, + {0x3807, 0xb7}, + {0x3808, 0x05}, + {0x3809, 0x10}, + {0x380a, 0x03}, + {0x380b, 0xcc}, + {0x380c, 0x02}, + {0x380d, 0xee}, + {0x380e, 0x07}, + {0x380f, 0xd0}, + {0x3811, 0x08}, + {0x3813, 0x0d}, + {0x3814, 0x03}, + {0x3815, 0x01}, + {0x3816, 0x03}, + {0x3817, 0x01}, + {0x381e, 0x02}, + {0x3820, 0x8b}, + {0x3821, 0x01}, + {0x3832, 0x04}, + {0x3c80, 0x01}, + {0x3c82, 0x00}, + {0x3c83, 0xc8}, + {0x3c8c, 0x0f}, + {0x3c8d, 0xa0}, + {0x3c90, 0x07}, + {0x3c91, 0x00}, + {0x3c92, 0x00}, + {0x3c93, 0x00}, + {0x3c94, 0xd0}, + {0x3c95, 0x50}, + {0x3c96, 0x35}, + {0x3c97, 0x00}, + {0x4001, 0xe0}, + {0x4008, 0x00}, + {0x4009, 0x07}, + {0x400f, 0x80}, + {0x4013, 0x02}, + {0x4040, 0x00}, + {0x4041, 0x03}, + {0x404c, 0x50}, + {0x404e, 0x20}, + {0x4500, 0x06}, + {0x4503, 0x00}, + {0x450a, 0x04}, + {0x4809, 0x04}, + {0x480c, 0x12}, + {0x4819, 0x70}, + {0x4825, 0x32}, + {0x4826, 0x32}, + {0x482a, 0x06}, + {0x4833, 0x08}, + {0x4837, 0x0d}, + {0x5000, 0x77}, + {0x5b00, 0x01}, + {0x5b01, 0x10}, + {0x5b02, 0x01}, + {0x5b03, 0xdb}, + {0x5b05, 0x6c}, + {0x5e10, 0xfc}, + {0x3500, 0x00}, + {0x3501, 0x1F}, + {0x3502, 0x20}, + {0x3503, 0x08}, + {0x3508, 0x04}, + {0x3509, 0x00}, + {0x3832, 0x48}, + {0x5780, 0x3e}, + {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, 0x06}, + {0x5792, 0x00}, + {0x5793, 0x52}, + {0x5794, 0xa3}, + {0x4003, 0x40}, + {0x3107, 0x01}, + {0x3c80, 0x08}, + {0x3c83, 0xb1}, + {0x3c8c, 0x10}, + {0x3c8d, 0x00}, + {0x3c90, 0x00}, + {0x3c94, 0x00}, + {0x3c95, 0x00}, + {0x3c96, 0x00}, + {0x37cb, 0x09}, + {0x37cc, 0x15}, + {0x37cd, 0x1f}, + {0x37ce, 0x1f}, +}; + +static const char * const ov5675_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[] = { + OV5675_LINK_FREQ_450MHZ, +}; + +static const struct ov5675_link_freq_config link_freq_configs[] = { + [OV5675_LINK_FREQ_900MBPS] = { + .reg_list = { + .num_of_regs = ARRAY_SIZE(mipi_data_rate_900mbps), + .regs = mipi_data_rate_900mbps, + } + } +}; + +static const struct ov5675_mode supported_modes[] = { + { + .width = 2592, + .height = 1944, + .hts = 1500, + .vts_def = OV5675_VTS_30FPS, + .vts_min = OV5675_VTS_30FPS_MIN, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs), + .regs = mode_2592x1944_regs, + }, + .link_freq_index = OV5675_LINK_FREQ_900MBPS, + }, + { + .width = 1296, + .height = 972, + .hts = 1500, + .vts_def = OV5675_VTS_30FPS, + .vts_min = OV5675_VTS_30FPS_MIN, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_1296x972_regs), + .regs = mode_1296x972_regs, + }, + .link_freq_index = OV5675_LINK_FREQ_900MBPS, + } +}; + +struct ov5675 { + struct v4l2_subdev sd; + struct media_pad pad; + struct v4l2_ctrl_handler ctrl_handler; + struct clk *xvclk; + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[OV5675_NUM_SUPPLIES]; + + /* 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 ov5675_mode *cur_mode; + + /* To serialize asynchronus callbacks */ + struct mutex mutex; + + /* Streaming on/off */ + bool streaming; + + /* True if the device has been identified */ + bool identified; +}; + +static u64 to_pixel_rate(u32 f_index) +{ + u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV5675_DATA_LANES; + + do_div(pixel_rate, OV5675_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, OV5675_SCLK); + + return ppl; +} + +static int ov5675_read_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 *val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->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 ov5675_write_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->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 ov5675_write_reg_list(struct ov5675 *ov5675, + const struct ov5675_reg_list *r_list) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); + unsigned int i; + int ret; + + for (i = 0; i < r_list->num_of_regs; i++) { + ret = ov5675_write_reg(ov5675, 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 ov5675_update_digital_gain(struct ov5675 *ov5675, u32 d_gain) +{ + int ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_GROUP_ACCESS, + OV5675_REG_VALUE_08BIT, + OV5675_GROUP_HOLD_START); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_R_GAIN, + OV5675_REG_VALUE_16BIT, d_gain); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_G_GAIN, + OV5675_REG_VALUE_16BIT, d_gain); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_B_GAIN, + OV5675_REG_VALUE_16BIT, d_gain); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_GROUP_ACCESS, + OV5675_REG_VALUE_08BIT, + OV5675_GROUP_HOLD_END); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_GROUP_ACCESS, + OV5675_REG_VALUE_08BIT, + OV5675_GROUP_HOLD_LAUNCH); + return ret; +} + +static int ov5675_test_pattern(struct ov5675 *ov5675, u32 pattern) +{ + if (pattern) + pattern = (pattern - 1) << OV5675_TEST_PATTERN_BAR_SHIFT | + OV5675_TEST_PATTERN_ENABLE; + + return ov5675_write_reg(ov5675, OV5675_REG_TEST_PATTERN, + OV5675_REG_VALUE_08BIT, pattern); +} + +/* + * OV5675 supports keeping the pixel order by mirror and flip function + * The Bayer order isn't affected by the flip controls + */ +static int ov5675_set_ctrl_hflip(struct ov5675 *ov5675, u32 ctrl_val) +{ + int ret; + u32 val; + + ret = ov5675_read_reg(ov5675, OV5675_REG_FORMAT1, + OV5675_REG_VALUE_08BIT, &val); + if (ret) + return ret; + + return ov5675_write_reg(ov5675, OV5675_REG_FORMAT1, + OV5675_REG_VALUE_08BIT, + ctrl_val ? val & ~BIT(3) : val | BIT(3)); +} + +static int ov5675_set_ctrl_vflip(struct ov5675 *ov5675, u8 ctrl_val) +{ + int ret; + u32 val; + + ret = ov5675_read_reg(ov5675, OV5675_REG_FORMAT1, + OV5675_REG_VALUE_08BIT, &val); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_FORMAT1, + OV5675_REG_VALUE_08BIT, + ctrl_val ? val | BIT(4) | BIT(5) : val & ~BIT(4) & ~BIT(5)); + + if (ret) + return ret; + + ret = ov5675_read_reg(ov5675, OV5675_REG_FORMAT2, + OV5675_REG_VALUE_08BIT, &val); + + if (ret) + return ret; + + return ov5675_write_reg(ov5675, OV5675_REG_FORMAT2, + OV5675_REG_VALUE_08BIT, + ctrl_val ? val | BIT(1) : val & ~BIT(1)); +} + +static int ov5675_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov5675 *ov5675 = container_of(ctrl->handler, + struct ov5675, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->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 = ov5675->cur_mode->height + ctrl->val - + OV5675_EXPOSURE_MAX_MARGIN; + __v4l2_ctrl_modify_range(ov5675->exposure, + ov5675->exposure->minimum, + exposure_max, ov5675->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 = ov5675_write_reg(ov5675, OV5675_REG_ANALOG_GAIN, + OV5675_REG_VALUE_16BIT, ctrl->val); + break; + + case V4L2_CID_DIGITAL_GAIN: + ret = ov5675_update_digital_gain(ov5675, ctrl->val); + break; + + case V4L2_CID_EXPOSURE: + /* 4 least significant bits of expsoure are fractional part + * val = val << 4 + * for ov5675, the unit of exposure is differnt from other + * OmniVision sensors, its exposure value is twice of the + * register value, the exposure should be divided by 2 before + * set register, e.g. val << 3. + */ + ret = ov5675_write_reg(ov5675, OV5675_REG_EXPOSURE, + OV5675_REG_VALUE_24BIT, ctrl->val << 3); + break; + + case V4L2_CID_VBLANK: + ret = ov5675_write_reg(ov5675, OV5675_REG_VTS, + OV5675_REG_VALUE_16BIT, + ov5675->cur_mode->height + ctrl->val + + 10); + break; + + case V4L2_CID_TEST_PATTERN: + ret = ov5675_test_pattern(ov5675, ctrl->val); + break; + + case V4L2_CID_HFLIP: + ov5675_set_ctrl_hflip(ov5675, ctrl->val); + break; + + case V4L2_CID_VFLIP: + ov5675_set_ctrl_vflip(ov5675, ctrl->val); + break; + + default: + ret = -EINVAL; + break; + } + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops ov5675_ctrl_ops = { + .s_ctrl = ov5675_set_ctrl, +}; + +static int ov5675_init_controls(struct ov5675 *ov5675) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); + struct v4l2_fwnode_device_properties props; + struct v4l2_ctrl_handler *ctrl_hdlr; + s64 exposure_max, h_blank; + int ret; + + ctrl_hdlr = &ov5675->ctrl_handler; + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10); + if (ret) + return ret; + + ctrl_hdlr->lock = &ov5675->mutex; + ov5675->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_LINK_FREQ, + ARRAY_SIZE(link_freq_menu_items) - 1, + 0, link_freq_menu_items); + if (ov5675->link_freq) + ov5675->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + ov5675->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_PIXEL_RATE, 0, + to_pixel_rate(OV5675_LINK_FREQ_900MBPS), + 1, + to_pixel_rate(OV5675_LINK_FREQ_900MBPS)); + ov5675->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_VBLANK, + ov5675->cur_mode->vts_min - ov5675->cur_mode->height, + OV5675_VTS_MAX - ov5675->cur_mode->height, 1, + ov5675->cur_mode->vts_def - ov5675->cur_mode->height); + h_blank = to_pixels_per_line(ov5675->cur_mode->hts, + ov5675->cur_mode->link_freq_index) - ov5675->cur_mode->width; + ov5675->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_HBLANK, h_blank, h_blank, 1, + h_blank); + if (ov5675->hblank) + ov5675->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, + OV5675_ANAL_GAIN_MIN, OV5675_ANAL_GAIN_MAX, + OV5675_ANAL_GAIN_STEP, OV5675_ANAL_GAIN_MIN); + v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_DIGITAL_GAIN, + OV5675_DGTL_GAIN_MIN, OV5675_DGTL_GAIN_MAX, + OV5675_DGTL_GAIN_STEP, OV5675_DGTL_GAIN_DEFAULT); + exposure_max = (ov5675->cur_mode->vts_def - OV5675_EXPOSURE_MAX_MARGIN); + ov5675->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_EXPOSURE, + OV5675_EXPOSURE_MIN, exposure_max, + OV5675_EXPOSURE_STEP, + exposure_max); + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov5675_test_pattern_menu) - 1, + 0, 0, ov5675_test_pattern_menu); + v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + + if (ctrl_hdlr->error) { + v4l2_ctrl_handler_free(ctrl_hdlr); + return ctrl_hdlr->error; + } + + ret = v4l2_fwnode_device_parse(&client->dev, &props); + if (ret) + goto error; + + ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov5675_ctrl_ops, + &props); + if (ret) + goto error; + + ov5675->sd.ctrl_handler = ctrl_hdlr; + + return 0; + +error: + v4l2_ctrl_handler_free(ctrl_hdlr); + + return ret; +} + +static void ov5675_update_pad_format(const struct ov5675_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 ov5675_identify_module(struct ov5675 *ov5675) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); + int ret; + u32 val; + + if (ov5675->identified) + return 0; + + ret = ov5675_read_reg(ov5675, OV5675_REG_CHIP_ID, + OV5675_REG_VALUE_24BIT, &val); + if (ret) + return ret; + + if (val != OV5675_CHIP_ID) { + dev_err(&client->dev, "chip id mismatch: %x!=%x", + OV5675_CHIP_ID, val); + return -ENXIO; + } + + ov5675->identified = true; + + return 0; +} + +static int ov5675_start_streaming(struct ov5675 *ov5675) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); + const struct ov5675_reg_list *reg_list; + int link_freq_index, ret; + + ret = ov5675_identify_module(ov5675); + if (ret) + return ret; + + link_freq_index = ov5675->cur_mode->link_freq_index; + reg_list = &link_freq_configs[link_freq_index].reg_list; + ret = ov5675_write_reg_list(ov5675, reg_list); + if (ret) { + dev_err(&client->dev, "failed to set plls"); + return ret; + } + + reg_list = &ov5675->cur_mode->reg_list; + ret = ov5675_write_reg_list(ov5675, reg_list); + if (ret) { + dev_err(&client->dev, "failed to set mode"); + return ret; + } + + ret = __v4l2_ctrl_handler_setup(ov5675->sd.ctrl_handler); + if (ret) + return ret; + + ret = ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT, + OV5675_REG_VALUE_08BIT, OV5675_MODE_STREAMING); + if (ret) { + dev_err(&client->dev, "failed to set stream"); + return ret; + } + + return 0; +} + +static void ov5675_stop_streaming(struct ov5675 *ov5675) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); + + if (ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT, + OV5675_REG_VALUE_08BIT, OV5675_MODE_STANDBY)) + dev_err(&client->dev, "failed to set stream"); +} + +static int ov5675_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov5675 *ov5675 = to_ov5675(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int ret = 0; + + if (ov5675->streaming == enable) + return 0; + + mutex_lock(&ov5675->mutex); + if (enable) { + ret = pm_runtime_resume_and_get(&client->dev); + if (ret < 0) { + mutex_unlock(&ov5675->mutex); + return ret; + } + + ret = ov5675_start_streaming(ov5675); + if (ret) { + enable = 0; + ov5675_stop_streaming(ov5675); + pm_runtime_put(&client->dev); + } + } else { + ov5675_stop_streaming(ov5675); + pm_runtime_put(&client->dev); + } + + ov5675->streaming = enable; + mutex_unlock(&ov5675->mutex); + + return ret; +} + +static int ov5675_power_off(struct device *dev) +{ + /* 512 xvclk cycles after the last SCCB transation or MIPI frame end */ + u32 delay_us = DIV_ROUND_UP(512, OV5675_XVCLK_19_2 / 1000 / 1000); + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov5675 *ov5675 = to_ov5675(sd); + + usleep_range(delay_us, delay_us * 2); + + clk_disable_unprepare(ov5675->xvclk); + gpiod_set_value_cansleep(ov5675->reset_gpio, 1); + regulator_bulk_disable(OV5675_NUM_SUPPLIES, ov5675->supplies); + + return 0; +} + +static int ov5675_power_on(struct device *dev) +{ + u32 delay_us = DIV_ROUND_UP(8192, OV5675_XVCLK_19_2 / 1000 / 1000); + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov5675 *ov5675 = to_ov5675(sd); + int ret; + + ret = clk_prepare_enable(ov5675->xvclk); + if (ret < 0) { + dev_err(dev, "failed to enable xvclk: %d\n", ret); + return ret; + } + + gpiod_set_value_cansleep(ov5675->reset_gpio, 1); + + ret = regulator_bulk_enable(OV5675_NUM_SUPPLIES, ov5675->supplies); + if (ret) { + clk_disable_unprepare(ov5675->xvclk); + return ret; + } + + /* Reset pulse should be at least 2ms and reset gpio released only once + * regulators are stable. + */ + usleep_range(2000, 2200); + + gpiod_set_value_cansleep(ov5675->reset_gpio, 0); + + /* 8192 xvclk cycles prior to the first SCCB transation */ + usleep_range(delay_us, delay_us * 2); + + return 0; +} + +static int __maybe_unused ov5675_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov5675 *ov5675 = to_ov5675(sd); + + mutex_lock(&ov5675->mutex); + if (ov5675->streaming) + ov5675_stop_streaming(ov5675); + + mutex_unlock(&ov5675->mutex); + + return 0; +} + +static int __maybe_unused ov5675_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov5675 *ov5675 = to_ov5675(sd); + int ret; + + mutex_lock(&ov5675->mutex); + if (ov5675->streaming) { + ret = ov5675_start_streaming(ov5675); + if (ret) { + ov5675->streaming = false; + ov5675_stop_streaming(ov5675); + mutex_unlock(&ov5675->mutex); + return ret; + } + } + + mutex_unlock(&ov5675->mutex); + + return 0; +} + +static int ov5675_set_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct ov5675 *ov5675 = to_ov5675(sd); + const struct ov5675_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(&ov5675->mutex); + ov5675_update_pad_format(mode, &fmt->format); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { + *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format; + } else { + ov5675->cur_mode = mode; + __v4l2_ctrl_s_ctrl(ov5675->link_freq, mode->link_freq_index); + __v4l2_ctrl_s_ctrl_int64(ov5675->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(ov5675->vblank, + mode->vts_min - mode->height, + OV5675_VTS_MAX - mode->height, 1, + vblank_def); + __v4l2_ctrl_s_ctrl(ov5675->vblank, vblank_def); + h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) - + mode->width; + __v4l2_ctrl_modify_range(ov5675->hblank, h_blank, h_blank, 1, + h_blank); + } + + mutex_unlock(&ov5675->mutex); + + return 0; +} + +static int ov5675_get_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct ov5675 *ov5675 = to_ov5675(sd); + + mutex_lock(&ov5675->mutex); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) + fmt->format = *v4l2_subdev_get_try_format(&ov5675->sd, + sd_state, + fmt->pad); + else + ov5675_update_pad_format(ov5675->cur_mode, &fmt->format); + + mutex_unlock(&ov5675->mutex); + + return 0; +} + +static int ov5675_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) + return -EINVAL; + + switch (sel->target) { + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.top = 0; + sel->r.left = 0; + sel->r.width = 2624; + sel->r.height = 2000; + return 0; + case V4L2_SEL_TGT_CROP: + case V4L2_SEL_TGT_CROP_DEFAULT: + sel->r.top = 16; + sel->r.left = 16; + sel->r.width = 2592; + sel->r.height = 1944; + return 0; + } + return -EINVAL; +} + +static int ov5675_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->index > 0) + return -EINVAL; + + code->code = MEDIA_BUS_FMT_SGRBG10_1X10; + + return 0; +} + +static int ov5675_enum_frame_size(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_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 ov5675_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct ov5675 *ov5675 = to_ov5675(sd); + + mutex_lock(&ov5675->mutex); + ov5675_update_pad_format(&supported_modes[0], + v4l2_subdev_get_try_format(sd, fh->state, 0)); + mutex_unlock(&ov5675->mutex); + + return 0; +} + +static const struct v4l2_subdev_video_ops ov5675_video_ops = { + .s_stream = ov5675_set_stream, +}; + +static const struct v4l2_subdev_pad_ops ov5675_pad_ops = { + .set_fmt = ov5675_set_format, + .get_fmt = ov5675_get_format, + .get_selection = ov5675_get_selection, + .enum_mbus_code = ov5675_enum_mbus_code, + .enum_frame_size = ov5675_enum_frame_size, +}; + +static const struct v4l2_subdev_ops ov5675_subdev_ops = { + .video = &ov5675_video_ops, + .pad = &ov5675_pad_ops, +}; + +static const struct media_entity_operations ov5675_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static const struct v4l2_subdev_internal_ops ov5675_internal_ops = { + .open = ov5675_open, +}; + +static int ov5675_get_hwcfg(struct ov5675 *ov5675, 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 xvclk_rate; + int ret; + unsigned int i, j; + + if (!fwnode) + return -ENXIO; + + ov5675->xvclk = devm_clk_get_optional(dev, NULL); + if (IS_ERR(ov5675->xvclk)) + return dev_err_probe(dev, PTR_ERR(ov5675->xvclk), + "failed to get xvclk: %ld\n", + PTR_ERR(ov5675->xvclk)); + + if (ov5675->xvclk) { + xvclk_rate = clk_get_rate(ov5675->xvclk); + } else { + ret = fwnode_property_read_u32(fwnode, "clock-frequency", + &xvclk_rate); + + if (ret) { + dev_err(dev, "can't get clock frequency"); + return ret; + } + } + + if (xvclk_rate != OV5675_XVCLK_19_2) { + dev_err(dev, "external clock rate %u is unsupported", + xvclk_rate); + return -EINVAL; + } + + ov5675->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(ov5675->reset_gpio)) { + ret = PTR_ERR(ov5675->reset_gpio); + dev_err(dev, "failed to get reset-gpios: %d\n", ret); + return ret; + } + + for (i = 0; i < OV5675_NUM_SUPPLIES; i++) + ov5675->supplies[i].supply = ov5675_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, OV5675_NUM_SUPPLIES, + ov5675->supplies); + if (ret) + return ret; + + 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 != OV5675_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 void ov5675_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov5675 *ov5675 = to_ov5675(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(&ov5675->mutex); + + if (!pm_runtime_status_suspended(&client->dev)) + ov5675_power_off(&client->dev); + pm_runtime_set_suspended(&client->dev); +} + +static int ov5675_probe(struct i2c_client *client) +{ + struct ov5675 *ov5675; + bool full_power; + int ret; + + ov5675 = devm_kzalloc(&client->dev, sizeof(*ov5675), GFP_KERNEL); + if (!ov5675) + return -ENOMEM; + + ret = ov5675_get_hwcfg(ov5675, &client->dev); + if (ret) { + dev_err(&client->dev, "failed to get HW configuration: %d", + ret); + return ret; + } + + v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops); + + ret = ov5675_power_on(&client->dev); + if (ret) { + dev_err(&client->dev, "failed to power on: %d\n", ret); + return ret; + } + + full_power = acpi_dev_state_d0(&client->dev); + if (full_power) { + ret = ov5675_identify_module(ov5675); + if (ret) { + dev_err(&client->dev, "failed to find sensor: %d", ret); + goto probe_power_off; + } + } + + mutex_init(&ov5675->mutex); + ov5675->cur_mode = &supported_modes[0]; + ret = ov5675_init_controls(ov5675); + if (ret) { + dev_err(&client->dev, "failed to init controls: %d", ret); + goto probe_error_v4l2_ctrl_handler_free; + } + + ov5675->sd.internal_ops = &ov5675_internal_ops; + ov5675->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + ov5675->sd.entity.ops = &ov5675_subdev_entity_ops; + ov5675->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + ov5675->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&ov5675->sd.entity, 1, &ov5675->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(&ov5675->sd); + if (ret < 0) { + dev_err(&client->dev, "failed to register V4L2 subdev: %d", + ret); + goto probe_error_media_entity_cleanup; + } + + /* 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; + +probe_error_media_entity_cleanup: + media_entity_cleanup(&ov5675->sd.entity); + +probe_error_v4l2_ctrl_handler_free: + v4l2_ctrl_handler_free(ov5675->sd.ctrl_handler); + mutex_destroy(&ov5675->mutex); +probe_power_off: + ov5675_power_off(&client->dev); + + return ret; +} + +static const struct dev_pm_ops ov5675_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ov5675_suspend, ov5675_resume) + SET_RUNTIME_PM_OPS(ov5675_power_off, ov5675_power_on, NULL) +}; + +#ifdef CONFIG_ACPI +static const struct acpi_device_id ov5675_acpi_ids[] = { + {"OVTI5675"}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, ov5675_acpi_ids); +#endif + +static const struct of_device_id ov5675_of_match[] = { + { .compatible = "ovti,ov5675", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ov5675_of_match); + +static struct i2c_driver ov5675_i2c_driver = { + .driver = { + .name = "ov5675", + .pm = &ov5675_pm_ops, + .acpi_match_table = ACPI_PTR(ov5675_acpi_ids), + .of_match_table = ov5675_of_match, + }, + .probe = ov5675_probe, + .remove = ov5675_remove, + .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE, +}; + +module_i2c_driver(ov5675_i2c_driver); + +MODULE_AUTHOR("Shawn Tu"); +MODULE_DESCRIPTION("OmniVision OV5675 sensor driver"); +MODULE_LICENSE("GPL v2"); |