diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/media/i2c/ov9734.c | 1043 |
1 files changed, 1043 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov9734.c b/drivers/media/i2c/ov9734.c new file mode 100644 index 000000000..c5592ddb0 --- /dev/null +++ b/drivers/media/i2c/ov9734.c @@ -0,0 +1,1043 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Intel Corporation. + +#include <asm/unaligned.h> +#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 <media/v4l2-fwnode.h> + +#define OV9734_LINK_FREQ_180MHZ 180000000ULL +#define OV9734_SCLK 36000000LL +#define OV9734_MCLK 19200000 +/* ov9734 only support 1-lane mipi output */ +#define OV9734_DATA_LANES 1 +#define OV9734_RGB_DEPTH 10 + +#define OV9734_REG_CHIP_ID 0x300a +#define OV9734_CHIP_ID 0x9734 + +#define OV9734_REG_MODE_SELECT 0x0100 +#define OV9734_MODE_STANDBY 0x00 +#define OV9734_MODE_STREAMING 0x01 + +/* vertical-timings from sensor */ +#define OV9734_REG_VTS 0x380e +#define OV9734_VTS_30FPS 0x0322 +#define OV9734_VTS_30FPS_MIN 0x0322 +#define OV9734_VTS_MAX 0x7fff + +/* horizontal-timings from sensor */ +#define OV9734_REG_HTS 0x380c + +/* Exposure controls from sensor */ +#define OV9734_REG_EXPOSURE 0x3500 +#define OV9734_EXPOSURE_MIN 4 +#define OV9734_EXPOSURE_MAX_MARGIN 4 +#define OV9734_EXPOSURE_STEP 1 + +/* Analog gain controls from sensor */ +#define OV9734_REG_ANALOG_GAIN 0x350a +#define OV9734_ANAL_GAIN_MIN 16 +#define OV9734_ANAL_GAIN_MAX 248 +#define OV9734_ANAL_GAIN_STEP 1 + +/* Digital gain controls from sensor */ +#define OV9734_REG_MWB_R_GAIN 0x5180 +#define OV9734_REG_MWB_G_GAIN 0x5182 +#define OV9734_REG_MWB_B_GAIN 0x5184 +#define OV9734_DGTL_GAIN_MIN 256 +#define OV9734_DGTL_GAIN_MAX 1023 +#define OV9734_DGTL_GAIN_STEP 1 +#define OV9734_DGTL_GAIN_DEFAULT 256 + +/* Test Pattern Control */ +#define OV9734_REG_TEST_PATTERN 0x5080 +#define OV9734_TEST_PATTERN_ENABLE BIT(7) +#define OV9734_TEST_PATTERN_BAR_SHIFT 2 + +/* Group Access */ +#define OV9734_REG_GROUP_ACCESS 0x3208 +#define OV9734_GROUP_HOLD_START 0x0 +#define OV9734_GROUP_HOLD_END 0x10 +#define OV9734_GROUP_HOLD_LAUNCH 0xa0 + +enum { + OV9734_LINK_FREQ_180MHZ_INDEX, +}; + +struct ov9734_reg { + u16 address; + u8 val; +}; + +struct ov9734_reg_list { + u32 num_of_regs; + const struct ov9734_reg *regs; +}; + +struct ov9734_link_freq_config { + const struct ov9734_reg_list reg_list; +}; + +struct ov9734_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 ov9734_reg_list reg_list; +}; + +static const struct ov9734_reg mipi_data_rate_360mbps[] = { + {0x3030, 0x19}, + {0x3080, 0x02}, + {0x3081, 0x4b}, + {0x3082, 0x04}, + {0x3083, 0x00}, + {0x3084, 0x02}, + {0x3085, 0x01}, + {0x3086, 0x01}, + {0x3089, 0x01}, + {0x308a, 0x00}, + {0x301e, 0x15}, + {0x3103, 0x01}, +}; + +static const struct ov9734_reg mode_1296x734_regs[] = { + {0x3001, 0x00}, + {0x3002, 0x00}, + {0x3007, 0x00}, + {0x3010, 0x00}, + {0x3011, 0x08}, + {0x3014, 0x22}, + {0x3600, 0x55}, + {0x3601, 0x02}, + {0x3605, 0x22}, + {0x3611, 0xe7}, + {0x3654, 0x10}, + {0x3655, 0x77}, + {0x3656, 0x77}, + {0x3657, 0x07}, + {0x3658, 0x22}, + {0x3659, 0x22}, + {0x365a, 0x02}, + {0x3784, 0x05}, + {0x3785, 0x55}, + {0x37c0, 0x07}, + {0x3800, 0x00}, + {0x3801, 0x04}, + {0x3802, 0x00}, + {0x3803, 0x04}, + {0x3804, 0x05}, + {0x3805, 0x0b}, + {0x3806, 0x02}, + {0x3807, 0xdb}, + {0x3808, 0x05}, + {0x3809, 0x00}, + {0x380a, 0x02}, + {0x380b, 0xd0}, + {0x380c, 0x05}, + {0x380d, 0xc6}, + {0x380e, 0x03}, + {0x380f, 0x22}, + {0x3810, 0x00}, + {0x3811, 0x04}, + {0x3812, 0x00}, + {0x3813, 0x04}, + {0x3816, 0x00}, + {0x3817, 0x00}, + {0x3818, 0x00}, + {0x3819, 0x04}, + {0x3820, 0x18}, + {0x3821, 0x00}, + {0x382c, 0x06}, + {0x3500, 0x00}, + {0x3501, 0x31}, + {0x3502, 0x00}, + {0x3503, 0x03}, + {0x3504, 0x00}, + {0x3505, 0x00}, + {0x3509, 0x10}, + {0x350a, 0x00}, + {0x350b, 0x40}, + {0x3d00, 0x00}, + {0x3d01, 0x00}, + {0x3d02, 0x00}, + {0x3d03, 0x00}, + {0x3d04, 0x00}, + {0x3d05, 0x00}, + {0x3d06, 0x00}, + {0x3d07, 0x00}, + {0x3d08, 0x00}, + {0x3d09, 0x00}, + {0x3d0a, 0x00}, + {0x3d0b, 0x00}, + {0x3d0c, 0x00}, + {0x3d0d, 0x00}, + {0x3d0e, 0x00}, + {0x3d0f, 0x00}, + {0x3d80, 0x00}, + {0x3d81, 0x00}, + {0x3d82, 0x38}, + {0x3d83, 0xa4}, + {0x3d84, 0x00}, + {0x3d85, 0x00}, + {0x3d86, 0x1f}, + {0x3d87, 0x03}, + {0x3d8b, 0x00}, + {0x3d8f, 0x00}, + {0x4001, 0xe0}, + {0x4009, 0x0b}, + {0x4300, 0x03}, + {0x4301, 0xff}, + {0x4304, 0x00}, + {0x4305, 0x00}, + {0x4309, 0x00}, + {0x4600, 0x00}, + {0x4601, 0x80}, + {0x4800, 0x00}, + {0x4805, 0x00}, + {0x4821, 0x50}, + {0x4823, 0x50}, + {0x4837, 0x2d}, + {0x4a00, 0x00}, + {0x4f00, 0x80}, + {0x4f01, 0x10}, + {0x4f02, 0x00}, + {0x4f03, 0x00}, + {0x4f04, 0x00}, + {0x4f05, 0x00}, + {0x4f06, 0x00}, + {0x4f07, 0x00}, + {0x4f08, 0x00}, + {0x4f09, 0x00}, + {0x5000, 0x2f}, + {0x500c, 0x00}, + {0x500d, 0x00}, + {0x500e, 0x00}, + {0x500f, 0x00}, + {0x5010, 0x00}, + {0x5011, 0x00}, + {0x5012, 0x00}, + {0x5013, 0x00}, + {0x5014, 0x00}, + {0x5015, 0x00}, + {0x5016, 0x00}, + {0x5017, 0x00}, + {0x5080, 0x00}, + {0x5180, 0x01}, + {0x5181, 0x00}, + {0x5182, 0x01}, + {0x5183, 0x00}, + {0x5184, 0x01}, + {0x5185, 0x00}, + {0x5708, 0x06}, + {0x380f, 0x2a}, + {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, 0x04}, + {0x5792, 0x00}, + {0x5793, 0x52}, + {0x5794, 0xa3}, + {0x5000, 0x3f}, + {0x3801, 0x00}, + {0x3803, 0x00}, + {0x3805, 0x0f}, + {0x3807, 0xdf}, + {0x3809, 0x10}, + {0x380b, 0xde}, + {0x3811, 0x00}, + {0x3813, 0x01}, +}; + +static const char * const ov9734_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[] = { + OV9734_LINK_FREQ_180MHZ, +}; + +static const struct ov9734_link_freq_config link_freq_configs[] = { + [OV9734_LINK_FREQ_180MHZ_INDEX] = { + .reg_list = { + .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps), + .regs = mipi_data_rate_360mbps, + } + }, +}; + +static const struct ov9734_mode supported_modes[] = { + { + .width = 1296, + .height = 734, + .hts = 0x5c6, + .vts_def = OV9734_VTS_30FPS, + .vts_min = OV9734_VTS_30FPS_MIN, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_1296x734_regs), + .regs = mode_1296x734_regs, + }, + .link_freq_index = OV9734_LINK_FREQ_180MHZ_INDEX, + }, +}; + +struct ov9734 { + 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 ov9734_mode *cur_mode; + + /* To serialize asynchronus callbacks */ + struct mutex mutex; + + /* Streaming on/off */ + bool streaming; +}; + +static inline struct ov9734 *to_ov9734(struct v4l2_subdev *subdev) +{ + return container_of(subdev, struct ov9734, sd); +} + +static u64 to_pixel_rate(u32 f_index) +{ + u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV9734_DATA_LANES; + + do_div(pixel_rate, OV9734_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, OV9734_SCLK); + + return ppl; +} + +static int ov9734_read_reg(struct ov9734 *ov9734, u16 reg, u16 len, u32 *val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->sd); + struct i2c_msg msgs[2]; + u8 addr_buf[2]; + u8 data_buf[4] = {0}; + int ret; + + if (len > sizeof(data_buf)) + 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[sizeof(data_buf) - len]; + + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (ret != ARRAY_SIZE(msgs)) + return ret < 0 ? ret : -EIO; + + *val = get_unaligned_be32(data_buf); + + return 0; +} + +static int ov9734_write_reg(struct ov9734 *ov9734, u16 reg, u16 len, u32 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->sd); + u8 buf[6]; + int ret = 0; + + if (len > 4) + return -EINVAL; + + put_unaligned_be16(reg, buf); + put_unaligned_be32(val << 8 * (4 - len), buf + 2); + + ret = i2c_master_send(client, buf, len + 2); + if (ret != len + 2) + return ret < 0 ? ret : -EIO; + + return 0; +} + +static int ov9734_write_reg_list(struct ov9734 *ov9734, + const struct ov9734_reg_list *r_list) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->sd); + unsigned int i; + int ret; + + for (i = 0; i < r_list->num_of_regs; i++) { + ret = ov9734_write_reg(ov9734, r_list->regs[i].address, 1, + r_list->regs[i].val); + if (ret) { + dev_err_ratelimited(&client->dev, + "write reg 0x%4.4x return err = %d", + r_list->regs[i].address, ret); + return ret; + } + } + + return 0; +} + +static int ov9734_update_digital_gain(struct ov9734 *ov9734, u32 d_gain) +{ + int ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_GROUP_ACCESS, 1, + OV9734_GROUP_HOLD_START); + if (ret) + return ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_MWB_R_GAIN, 2, d_gain); + if (ret) + return ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_MWB_G_GAIN, 2, d_gain); + if (ret) + return ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_MWB_B_GAIN, 2, d_gain); + if (ret) + return ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_GROUP_ACCESS, 1, + OV9734_GROUP_HOLD_END); + if (ret) + return ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_GROUP_ACCESS, 1, + OV9734_GROUP_HOLD_LAUNCH); + return ret; +} + +static int ov9734_test_pattern(struct ov9734 *ov9734, u32 pattern) +{ + if (pattern) + pattern = (pattern - 1) << OV9734_TEST_PATTERN_BAR_SHIFT | + OV9734_TEST_PATTERN_ENABLE; + + return ov9734_write_reg(ov9734, OV9734_REG_TEST_PATTERN, 1, pattern); +} + +static int ov9734_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov9734 *ov9734 = container_of(ctrl->handler, + struct ov9734, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->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 = ov9734->cur_mode->height + ctrl->val - + OV9734_EXPOSURE_MAX_MARGIN; + __v4l2_ctrl_modify_range(ov9734->exposure, + ov9734->exposure->minimum, + exposure_max, ov9734->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 = ov9734_write_reg(ov9734, OV9734_REG_ANALOG_GAIN, + 2, ctrl->val); + break; + + case V4L2_CID_DIGITAL_GAIN: + ret = ov9734_update_digital_gain(ov9734, ctrl->val); + break; + + case V4L2_CID_EXPOSURE: + /* 4 least significant bits of expsoure are fractional part */ + ret = ov9734_write_reg(ov9734, OV9734_REG_EXPOSURE, + 3, ctrl->val << 4); + break; + + case V4L2_CID_VBLANK: + ret = ov9734_write_reg(ov9734, OV9734_REG_VTS, 2, + ov9734->cur_mode->height + ctrl->val); + break; + + case V4L2_CID_TEST_PATTERN: + ret = ov9734_test_pattern(ov9734, ctrl->val); + break; + + default: + ret = -EINVAL; + break; + } + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops ov9734_ctrl_ops = { + .s_ctrl = ov9734_set_ctrl, +}; + +static int ov9734_init_controls(struct ov9734 *ov9734) +{ + struct v4l2_ctrl_handler *ctrl_hdlr; + const struct ov9734_mode *cur_mode; + s64 exposure_max, h_blank, pixel_rate; + u32 vblank_min, vblank_max, vblank_default; + int ret, size; + + ctrl_hdlr = &ov9734->ctrl_handler; + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8); + if (ret) + return ret; + + ctrl_hdlr->lock = &ov9734->mutex; + cur_mode = ov9734->cur_mode; + size = ARRAY_SIZE(link_freq_menu_items); + ov9734->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov9734_ctrl_ops, + V4L2_CID_LINK_FREQ, + size - 1, 0, + link_freq_menu_items); + if (ov9734->link_freq) + ov9734->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + pixel_rate = to_pixel_rate(OV9734_LINK_FREQ_180MHZ_INDEX); + ov9734->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov9734_ctrl_ops, + V4L2_CID_PIXEL_RATE, 0, + pixel_rate, 1, pixel_rate); + vblank_min = cur_mode->vts_min - cur_mode->height; + vblank_max = OV9734_VTS_MAX - cur_mode->height; + vblank_default = cur_mode->vts_def - cur_mode->height; + ov9734->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov9734_ctrl_ops, + V4L2_CID_VBLANK, vblank_min, + vblank_max, 1, vblank_default); + h_blank = to_pixels_per_line(cur_mode->hts, cur_mode->link_freq_index); + h_blank -= cur_mode->width; + ov9734->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov9734_ctrl_ops, + V4L2_CID_HBLANK, h_blank, h_blank, 1, + h_blank); + if (ov9734->hblank) + ov9734->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + v4l2_ctrl_new_std(ctrl_hdlr, &ov9734_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, + OV9734_ANAL_GAIN_MIN, OV9734_ANAL_GAIN_MAX, + OV9734_ANAL_GAIN_STEP, OV9734_ANAL_GAIN_MIN); + v4l2_ctrl_new_std(ctrl_hdlr, &ov9734_ctrl_ops, V4L2_CID_DIGITAL_GAIN, + OV9734_DGTL_GAIN_MIN, OV9734_DGTL_GAIN_MAX, + OV9734_DGTL_GAIN_STEP, OV9734_DGTL_GAIN_DEFAULT); + exposure_max = ov9734->cur_mode->vts_def - OV9734_EXPOSURE_MAX_MARGIN; + ov9734->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov9734_ctrl_ops, + V4L2_CID_EXPOSURE, + OV9734_EXPOSURE_MIN, exposure_max, + OV9734_EXPOSURE_STEP, + exposure_max); + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov9734_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov9734_test_pattern_menu) - 1, + 0, 0, ov9734_test_pattern_menu); + if (ctrl_hdlr->error) + return ctrl_hdlr->error; + + ov9734->sd.ctrl_handler = ctrl_hdlr; + + return 0; +} + +static void ov9734_update_pad_format(const struct ov9734_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 ov9734_start_streaming(struct ov9734 *ov9734) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->sd); + const struct ov9734_reg_list *reg_list; + int link_freq_index, ret; + + link_freq_index = ov9734->cur_mode->link_freq_index; + reg_list = &link_freq_configs[link_freq_index].reg_list; + ret = ov9734_write_reg_list(ov9734, reg_list); + if (ret) { + dev_err(&client->dev, "failed to set plls"); + return ret; + } + + reg_list = &ov9734->cur_mode->reg_list; + ret = ov9734_write_reg_list(ov9734, reg_list); + if (ret) { + dev_err(&client->dev, "failed to set mode"); + return ret; + } + + ret = __v4l2_ctrl_handler_setup(ov9734->sd.ctrl_handler); + if (ret) + return ret; + + ret = ov9734_write_reg(ov9734, OV9734_REG_MODE_SELECT, + 1, OV9734_MODE_STREAMING); + if (ret) + dev_err(&client->dev, "failed to start stream"); + + return ret; +} + +static void ov9734_stop_streaming(struct ov9734 *ov9734) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->sd); + + if (ov9734_write_reg(ov9734, OV9734_REG_MODE_SELECT, + 1, OV9734_MODE_STANDBY)) + dev_err(&client->dev, "failed to stop stream"); +} + +static int ov9734_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov9734 *ov9734 = to_ov9734(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int ret = 0; + + mutex_lock(&ov9734->mutex); + if (ov9734->streaming == enable) { + mutex_unlock(&ov9734->mutex); + return 0; + } + + if (enable) { + ret = pm_runtime_resume_and_get(&client->dev); + if (ret < 0) { + mutex_unlock(&ov9734->mutex); + return ret; + } + + ret = ov9734_start_streaming(ov9734); + if (ret) { + enable = 0; + ov9734_stop_streaming(ov9734); + pm_runtime_put(&client->dev); + } + } else { + ov9734_stop_streaming(ov9734); + pm_runtime_put(&client->dev); + } + + ov9734->streaming = enable; + mutex_unlock(&ov9734->mutex); + + return ret; +} + +static int __maybe_unused ov9734_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov9734 *ov9734 = to_ov9734(sd); + + mutex_lock(&ov9734->mutex); + if (ov9734->streaming) + ov9734_stop_streaming(ov9734); + + mutex_unlock(&ov9734->mutex); + + return 0; +} + +static int __maybe_unused ov9734_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov9734 *ov9734 = to_ov9734(sd); + int ret = 0; + + mutex_lock(&ov9734->mutex); + if (!ov9734->streaming) + goto exit; + + ret = ov9734_start_streaming(ov9734); + if (ret) { + ov9734->streaming = false; + ov9734_stop_streaming(ov9734); + } + +exit: + mutex_unlock(&ov9734->mutex); + return ret; +} + +static int ov9734_set_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct ov9734 *ov9734 = to_ov9734(sd); + const struct ov9734_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(&ov9734->mutex); + ov9734_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 { + ov9734->cur_mode = mode; + __v4l2_ctrl_s_ctrl(ov9734->link_freq, mode->link_freq_index); + __v4l2_ctrl_s_ctrl_int64(ov9734->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(ov9734->vblank, + mode->vts_min - mode->height, + OV9734_VTS_MAX - mode->height, 1, + vblank_def); + __v4l2_ctrl_s_ctrl(ov9734->vblank, vblank_def); + h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) - + mode->width; + __v4l2_ctrl_modify_range(ov9734->hblank, h_blank, h_blank, 1, + h_blank); + } + + mutex_unlock(&ov9734->mutex); + + return 0; +} + +static int ov9734_get_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct ov9734 *ov9734 = to_ov9734(sd); + + mutex_lock(&ov9734->mutex); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) + fmt->format = *v4l2_subdev_get_try_format(&ov9734->sd, + sd_state, + fmt->pad); + else + ov9734_update_pad_format(ov9734->cur_mode, &fmt->format); + + mutex_unlock(&ov9734->mutex); + + return 0; +} + +static int ov9734_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 ov9734_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 ov9734_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct ov9734 *ov9734 = to_ov9734(sd); + + mutex_lock(&ov9734->mutex); + ov9734_update_pad_format(&supported_modes[0], + v4l2_subdev_get_try_format(sd, fh->state, 0)); + mutex_unlock(&ov9734->mutex); + + return 0; +} + +static const struct v4l2_subdev_video_ops ov9734_video_ops = { + .s_stream = ov9734_set_stream, +}; + +static const struct v4l2_subdev_pad_ops ov9734_pad_ops = { + .set_fmt = ov9734_set_format, + .get_fmt = ov9734_get_format, + .enum_mbus_code = ov9734_enum_mbus_code, + .enum_frame_size = ov9734_enum_frame_size, +}; + +static const struct v4l2_subdev_ops ov9734_subdev_ops = { + .video = &ov9734_video_ops, + .pad = &ov9734_pad_ops, +}; + +static const struct media_entity_operations ov9734_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static const struct v4l2_subdev_internal_ops ov9734_internal_ops = { + .open = ov9734_open, +}; + +static int ov9734_identify_module(struct ov9734 *ov9734) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov9734->sd); + int ret; + u32 val; + + ret = ov9734_read_reg(ov9734, OV9734_REG_CHIP_ID, 2, &val); + if (ret) + return ret; + + if (val != OV9734_CHIP_ID) { + dev_err(&client->dev, "chip id mismatch: %x!=%x", + OV9734_CHIP_ID, val); + return -ENXIO; + } + + return 0; +} + +static int ov9734_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; + + ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk); + if (ret) + return ret; + + if (mclk != OV9734_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.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 ov9734_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov9734 *ov9734 = to_ov9734(sd); + + v4l2_async_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(sd->ctrl_handler); + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + mutex_destroy(&ov9734->mutex); +} + +static int ov9734_probe(struct i2c_client *client) +{ + struct ov9734 *ov9734; + int ret; + + ret = ov9734_check_hwcfg(&client->dev); + if (ret) { + dev_err(&client->dev, "failed to check HW configuration: %d", + ret); + return ret; + } + + ov9734 = devm_kzalloc(&client->dev, sizeof(*ov9734), GFP_KERNEL); + if (!ov9734) + return -ENOMEM; + + v4l2_i2c_subdev_init(&ov9734->sd, client, &ov9734_subdev_ops); + ret = ov9734_identify_module(ov9734); + if (ret) { + dev_err(&client->dev, "failed to find sensor: %d", ret); + return ret; + } + + mutex_init(&ov9734->mutex); + ov9734->cur_mode = &supported_modes[0]; + ret = ov9734_init_controls(ov9734); + if (ret) { + dev_err(&client->dev, "failed to init controls: %d", ret); + goto probe_error_v4l2_ctrl_handler_free; + } + + ov9734->sd.internal_ops = &ov9734_internal_ops; + ov9734->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + ov9734->sd.entity.ops = &ov9734_subdev_entity_ops; + ov9734->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + ov9734->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&ov9734->sd.entity, 1, &ov9734->pad); + if (ret) { + dev_err(&client->dev, "failed to init entity pads: %d", ret); + goto probe_error_v4l2_ctrl_handler_free; + } + + /* + * 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); + + ret = v4l2_async_register_subdev_sensor(&ov9734->sd); + if (ret < 0) { + dev_err(&client->dev, "failed to register V4L2 subdev: %d", + ret); + goto probe_error_media_entity_cleanup_pm; + } + + return 0; + +probe_error_media_entity_cleanup_pm: + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + media_entity_cleanup(&ov9734->sd.entity); + +probe_error_v4l2_ctrl_handler_free: + v4l2_ctrl_handler_free(ov9734->sd.ctrl_handler); + mutex_destroy(&ov9734->mutex); + + return ret; +} + +static const struct dev_pm_ops ov9734_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ov9734_suspend, ov9734_resume) +}; + +static const struct acpi_device_id ov9734_acpi_ids[] = { + { "OVTI9734", }, + {} +}; + +MODULE_DEVICE_TABLE(acpi, ov9734_acpi_ids); + +static struct i2c_driver ov9734_i2c_driver = { + .driver = { + .name = "ov9734", + .pm = &ov9734_pm_ops, + .acpi_match_table = ov9734_acpi_ids, + }, + .probe_new = ov9734_probe, + .remove = ov9734_remove, +}; + +module_i2c_driver(ov9734_i2c_driver); + +MODULE_AUTHOR("Qiu, Tianshu <tian.shu.qiu@intel.com>"); +MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>"); +MODULE_DESCRIPTION("OmniVision OV9734 sensor driver"); +MODULE_LICENSE("GPL v2"); |