/* * Support for GalaxyCore GC0310 VGA camera sensor. * * Copyright (c) 2013 Intel Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../include/linux/atomisp_gmin_platform.h" #include "gc0310.h" /* i2c read/write stuff */ static int gc0310_read_reg(struct i2c_client *client, u16 data_length, u8 reg, u8 *val) { int err; struct i2c_msg msg[2]; unsigned char data[1]; if (!client->adapter) { dev_err(&client->dev, "%s error, no client->adapter\n", __func__); return -ENODEV; } if (data_length != GC0310_8BIT) { dev_err(&client->dev, "%s error, invalid data length\n", __func__); return -EINVAL; } memset(msg, 0, sizeof(msg)); msg[0].addr = client->addr; msg[0].flags = 0; msg[0].len = I2C_MSG_LENGTH; msg[0].buf = data; /* high byte goes out first */ data[0] = (u8)(reg & 0xff); msg[1].addr = client->addr; msg[1].len = data_length; msg[1].flags = I2C_M_RD; msg[1].buf = data; err = i2c_transfer(client->adapter, msg, 2); if (err != 2) { if (err >= 0) err = -EIO; dev_err(&client->dev, "read from offset 0x%x error %d", reg, err); return err; } *val = 0; /* high byte comes first */ if (data_length == GC0310_8BIT) *val = (u8)data[0]; return 0; } static int gc0310_i2c_write(struct i2c_client *client, u16 len, u8 *data) { struct i2c_msg msg; const int num_msg = 1; int ret; msg.addr = client->addr; msg.flags = 0; msg.len = len; msg.buf = data; ret = i2c_transfer(client->adapter, &msg, 1); return ret == num_msg ? 0 : -EIO; } static int gc0310_write_reg(struct i2c_client *client, u16 data_length, u8 reg, u8 val) { int ret; unsigned char data[2] = {0}; u8 *wreg = (u8 *)data; const u16 len = data_length + sizeof(u8); /* 8-bit address + data */ if (data_length != GC0310_8BIT) { dev_err(&client->dev, "%s error, invalid data_length\n", __func__); return -EINVAL; } /* high byte goes out first */ *wreg = (u8)(reg & 0xff); if (data_length == GC0310_8BIT) data[1] = (u8)(val); ret = gc0310_i2c_write(client, len, data); if (ret) dev_err(&client->dev, "write error: wrote 0x%x to offset 0x%x error %d", val, reg, ret); return ret; } /* * gc0310_write_reg_array - Initializes a list of GC0310 registers * @client: i2c driver client structure * @reglist: list of registers to be written * * This function initializes a list of registers. When consecutive addresses * are found in a row on the list, this function creates a buffer and sends * consecutive data in a single i2c_transfer(). * * __gc0310_flush_reg_array, __gc0310_buf_reg_array() and * __gc0310_write_reg_is_consecutive() are internal functions to * gc0310_write_reg_array_fast() and should be not used anywhere else. * */ static int __gc0310_flush_reg_array(struct i2c_client *client, struct gc0310_write_ctrl *ctrl) { u16 size; if (ctrl->index == 0) return 0; size = sizeof(u8) + ctrl->index; /* 8-bit address + data */ ctrl->buffer.addr = (u8)(ctrl->buffer.addr); ctrl->index = 0; return gc0310_i2c_write(client, size, (u8 *)&ctrl->buffer); } static int __gc0310_buf_reg_array(struct i2c_client *client, struct gc0310_write_ctrl *ctrl, const struct gc0310_reg *next) { int size; switch (next->type) { case GC0310_8BIT: size = 1; ctrl->buffer.data[ctrl->index] = (u8)next->val; break; default: return -EINVAL; } /* When first item is added, we need to store its starting address */ if (ctrl->index == 0) ctrl->buffer.addr = next->reg; ctrl->index += size; /* * Buffer cannot guarantee free space for u32? Better flush it to avoid * possible lack of memory for next item. */ if (ctrl->index + sizeof(u8) >= GC0310_MAX_WRITE_BUF_SIZE) return __gc0310_flush_reg_array(client, ctrl); return 0; } static int __gc0310_write_reg_is_consecutive(struct i2c_client *client, struct gc0310_write_ctrl *ctrl, const struct gc0310_reg *next) { if (ctrl->index == 0) return 1; return ctrl->buffer.addr + ctrl->index == next->reg; } static int gc0310_write_reg_array(struct i2c_client *client, const struct gc0310_reg *reglist) { const struct gc0310_reg *next = reglist; struct gc0310_write_ctrl ctrl; int err; ctrl.index = 0; for (; next->type != GC0310_TOK_TERM; next++) { switch (next->type & GC0310_TOK_MASK) { case GC0310_TOK_DELAY: err = __gc0310_flush_reg_array(client, &ctrl); if (err) return err; msleep(next->val); break; default: /* * If next address is not consecutive, data needs to be * flushed before proceed. */ if (!__gc0310_write_reg_is_consecutive(client, &ctrl, next)) { err = __gc0310_flush_reg_array(client, &ctrl); if (err) return err; } err = __gc0310_buf_reg_array(client, &ctrl, next); if (err) { dev_err(&client->dev, "%s: write error, aborted\n", __func__); return err; } break; } } return __gc0310_flush_reg_array(client, &ctrl); } static int gc0310_g_focal(struct v4l2_subdev *sd, s32 *val) { *val = (GC0310_FOCAL_LENGTH_NUM << 16) | GC0310_FOCAL_LENGTH_DEM; return 0; } static int gc0310_g_fnumber(struct v4l2_subdev *sd, s32 *val) { /*const f number for imx*/ *val = (GC0310_F_NUMBER_DEFAULT_NUM << 16) | GC0310_F_NUMBER_DEM; return 0; } static int gc0310_g_fnumber_range(struct v4l2_subdev *sd, s32 *val) { *val = (GC0310_F_NUMBER_DEFAULT_NUM << 24) | (GC0310_F_NUMBER_DEM << 16) | (GC0310_F_NUMBER_DEFAULT_NUM << 8) | GC0310_F_NUMBER_DEM; return 0; } static int gc0310_g_bin_factor_x(struct v4l2_subdev *sd, s32 *val) { struct gc0310_device *dev = to_gc0310_sensor(sd); *val = gc0310_res[dev->fmt_idx].bin_factor_x; return 0; } static int gc0310_g_bin_factor_y(struct v4l2_subdev *sd, s32 *val) { struct gc0310_device *dev = to_gc0310_sensor(sd); *val = gc0310_res[dev->fmt_idx].bin_factor_y; return 0; } static int gc0310_get_intg_factor(struct i2c_client *client, struct camera_mipi_info *info, const struct gc0310_resolution *res) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct gc0310_device *dev = to_gc0310_sensor(sd); struct atomisp_sensor_mode_data *buf = &info->data; u16 val; u8 reg_val; int ret; unsigned int hori_blanking; unsigned int vert_blanking; unsigned int sh_delay; if (!info) return -EINVAL; /* pixel clock calculattion */ dev->vt_pix_clk_freq_mhz = 14400000; // 16.8MHz buf->vt_pix_clk_freq_mhz = dev->vt_pix_clk_freq_mhz; pr_info("vt_pix_clk_freq_mhz=%d\n", buf->vt_pix_clk_freq_mhz); /* get integration time */ buf->coarse_integration_time_min = GC0310_COARSE_INTG_TIME_MIN; buf->coarse_integration_time_max_margin = GC0310_COARSE_INTG_TIME_MAX_MARGIN; buf->fine_integration_time_min = GC0310_FINE_INTG_TIME_MIN; buf->fine_integration_time_max_margin = GC0310_FINE_INTG_TIME_MAX_MARGIN; buf->fine_integration_time_def = GC0310_FINE_INTG_TIME_MIN; buf->read_mode = res->bin_mode; /* get the cropping and output resolution to ISP for this mode. */ /* Getting crop_horizontal_start */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_H_CROP_START_H, ®_val); if (ret) return ret; val = (reg_val & 0xFF) << 8; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_H_CROP_START_L, ®_val); if (ret) return ret; buf->crop_horizontal_start = val | (reg_val & 0xFF); pr_info("crop_horizontal_start=%d\n", buf->crop_horizontal_start); /* Getting crop_vertical_start */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_V_CROP_START_H, ®_val); if (ret) return ret; val = (reg_val & 0xFF) << 8; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_V_CROP_START_L, ®_val); if (ret) return ret; buf->crop_vertical_start = val | (reg_val & 0xFF); pr_info("crop_vertical_start=%d\n", buf->crop_vertical_start); /* Getting output_width */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_H_OUTSIZE_H, ®_val); if (ret) return ret; val = (reg_val & 0xFF) << 8; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_H_OUTSIZE_L, ®_val); if (ret) return ret; buf->output_width = val | (reg_val & 0xFF); pr_info("output_width=%d\n", buf->output_width); /* Getting output_height */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_V_OUTSIZE_H, ®_val); if (ret) return ret; val = (reg_val & 0xFF) << 8; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_V_OUTSIZE_L, ®_val); if (ret) return ret; buf->output_height = val | (reg_val & 0xFF); pr_info("output_height=%d\n", buf->output_height); buf->crop_horizontal_end = buf->crop_horizontal_start + buf->output_width - 1; buf->crop_vertical_end = buf->crop_vertical_start + buf->output_height - 1; pr_info("crop_horizontal_end=%d\n", buf->crop_horizontal_end); pr_info("crop_vertical_end=%d\n", buf->crop_vertical_end); /* Getting line_length_pck */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_H_BLANKING_H, ®_val); if (ret) return ret; val = (reg_val & 0xFF) << 8; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_H_BLANKING_L, ®_val); if (ret) return ret; hori_blanking = val | (reg_val & 0xFF); ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_SH_DELAY, ®_val); if (ret) return ret; sh_delay = reg_val; buf->line_length_pck = buf->output_width + hori_blanking + sh_delay + 4; pr_info("hori_blanking=%d sh_delay=%d line_length_pck=%d\n", hori_blanking, sh_delay, buf->line_length_pck); /* Getting frame_length_lines */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_V_BLANKING_H, ®_val); if (ret) return ret; val = (reg_val & 0xFF) << 8; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_V_BLANKING_L, ®_val); if (ret) return ret; vert_blanking = val | (reg_val & 0xFF); buf->frame_length_lines = buf->output_height + vert_blanking; pr_info("vert_blanking=%d frame_length_lines=%d\n", vert_blanking, buf->frame_length_lines); buf->binning_factor_x = res->bin_factor_x ? res->bin_factor_x : 1; buf->binning_factor_y = res->bin_factor_y ? res->bin_factor_y : 1; return 0; } static int gc0310_set_gain(struct v4l2_subdev *sd, int gain) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; u8 again, dgain; if (gain < 0x20) gain = 0x20; if (gain > 0x80) gain = 0x80; if (gain >= 0x20 && gain < 0x40) { again = 0x0; /* sqrt(2) */ dgain = gain; } else { again = 0x2; /* 2 * sqrt(2) */ dgain = gain / 2; } pr_info("gain=0x%x again=0x%x dgain=0x%x\n", gain, again, dgain); /* set analog gain */ ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_AGC_ADJ, again); if (ret) return ret; /* set digital gain */ ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_DGC_ADJ, dgain); if (ret) return ret; return 0; } static int __gc0310_set_exposure(struct v4l2_subdev *sd, int coarse_itg, int gain, int digitgain) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; pr_info("coarse_itg=%d gain=%d digitgain=%d\n", coarse_itg, gain, digitgain); /* set exposure */ ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_AEC_PK_EXPO_L, coarse_itg & 0xff); if (ret) return ret; ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_AEC_PK_EXPO_H, (coarse_itg >> 8) & 0x0f); if (ret) return ret; ret = gc0310_set_gain(sd, gain); if (ret) return ret; return ret; } static int gc0310_set_exposure(struct v4l2_subdev *sd, int exposure, int gain, int digitgain) { struct gc0310_device *dev = to_gc0310_sensor(sd); int ret; mutex_lock(&dev->input_lock); ret = __gc0310_set_exposure(sd, exposure, gain, digitgain); mutex_unlock(&dev->input_lock); return ret; } static long gc0310_s_exposure(struct v4l2_subdev *sd, struct atomisp_exposure *exposure) { int exp = exposure->integration_time[0]; int gain = exposure->gain[0]; int digitgain = exposure->gain[1]; /* we should not accept the invalid value below. */ if (gain == 0) { struct i2c_client *client = v4l2_get_subdevdata(sd); v4l2_err(client, "%s: invalid value\n", __func__); return -EINVAL; } return gc0310_set_exposure(sd, exp, gain, digitgain); } /* TO DO */ static int gc0310_v_flip(struct v4l2_subdev *sd, s32 value) { return 0; } /* TO DO */ static int gc0310_h_flip(struct v4l2_subdev *sd, s32 value) { return 0; } static long gc0310_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { switch (cmd) { case ATOMISP_IOC_S_EXPOSURE: return gc0310_s_exposure(sd, arg); default: return -EINVAL; } return 0; } /* This returns the exposure time being used. This should only be used * for filling in EXIF data, not for actual image processing. */ static int gc0310_q_exposure(struct v4l2_subdev *sd, s32 *value) { struct i2c_client *client = v4l2_get_subdevdata(sd); u8 reg_v; int ret; /* get exposure */ ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_AEC_PK_EXPO_L, ®_v); if (ret) goto err; *value = reg_v; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_AEC_PK_EXPO_H, ®_v); if (ret) goto err; *value = *value + (reg_v << 8); err: return ret; } static int gc0310_s_ctrl(struct v4l2_ctrl *ctrl) { struct gc0310_device *dev = container_of(ctrl->handler, struct gc0310_device, ctrl_handler); struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); int ret = 0; switch (ctrl->id) { case V4L2_CID_VFLIP: dev_dbg(&client->dev, "%s: CID_VFLIP:%d.\n", __func__, ctrl->val); ret = gc0310_v_flip(&dev->sd, ctrl->val); break; case V4L2_CID_HFLIP: dev_dbg(&client->dev, "%s: CID_HFLIP:%d.\n", __func__, ctrl->val); ret = gc0310_h_flip(&dev->sd, ctrl->val); break; default: ret = -EINVAL; } return ret; } static int gc0310_g_volatile_ctrl(struct v4l2_ctrl *ctrl) { struct gc0310_device *dev = container_of(ctrl->handler, struct gc0310_device, ctrl_handler); int ret = 0; switch (ctrl->id) { case V4L2_CID_EXPOSURE_ABSOLUTE: ret = gc0310_q_exposure(&dev->sd, &ctrl->val); break; case V4L2_CID_FOCAL_ABSOLUTE: ret = gc0310_g_focal(&dev->sd, &ctrl->val); break; case V4L2_CID_FNUMBER_ABSOLUTE: ret = gc0310_g_fnumber(&dev->sd, &ctrl->val); break; case V4L2_CID_FNUMBER_RANGE: ret = gc0310_g_fnumber_range(&dev->sd, &ctrl->val); break; case V4L2_CID_BIN_FACTOR_HORZ: ret = gc0310_g_bin_factor_x(&dev->sd, &ctrl->val); break; case V4L2_CID_BIN_FACTOR_VERT: ret = gc0310_g_bin_factor_y(&dev->sd, &ctrl->val); break; default: ret = -EINVAL; } return ret; } static const struct v4l2_ctrl_ops ctrl_ops = { .s_ctrl = gc0310_s_ctrl, .g_volatile_ctrl = gc0310_g_volatile_ctrl }; struct v4l2_ctrl_config gc0310_controls[] = { { .ops = &ctrl_ops, .id = V4L2_CID_EXPOSURE_ABSOLUTE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "exposure", .min = 0x0, .max = 0xffff, .step = 0x01, .def = 0x00, .flags = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_VFLIP, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Flip", .min = 0, .max = 1, .step = 1, .def = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_HFLIP, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Mirror", .min = 0, .max = 1, .step = 1, .def = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_FOCAL_ABSOLUTE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "focal length", .min = GC0310_FOCAL_LENGTH_DEFAULT, .max = GC0310_FOCAL_LENGTH_DEFAULT, .step = 0x01, .def = GC0310_FOCAL_LENGTH_DEFAULT, .flags = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_FNUMBER_ABSOLUTE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "f-number", .min = GC0310_F_NUMBER_DEFAULT, .max = GC0310_F_NUMBER_DEFAULT, .step = 0x01, .def = GC0310_F_NUMBER_DEFAULT, .flags = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_FNUMBER_RANGE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "f-number range", .min = GC0310_F_NUMBER_RANGE, .max = GC0310_F_NUMBER_RANGE, .step = 0x01, .def = GC0310_F_NUMBER_RANGE, .flags = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_BIN_FACTOR_HORZ, .type = V4L2_CTRL_TYPE_INTEGER, .name = "horizontal binning factor", .min = 0, .max = GC0310_BIN_FACTOR_MAX, .step = 1, .def = 0, .flags = 0, }, { .ops = &ctrl_ops, .id = V4L2_CID_BIN_FACTOR_VERT, .type = V4L2_CTRL_TYPE_INTEGER, .name = "vertical binning factor", .min = 0, .max = GC0310_BIN_FACTOR_MAX, .step = 1, .def = 0, .flags = 0, }, }; static int gc0310_init(struct v4l2_subdev *sd) { int ret; struct i2c_client *client = v4l2_get_subdevdata(sd); struct gc0310_device *dev = to_gc0310_sensor(sd); pr_info("%s S\n", __func__); mutex_lock(&dev->input_lock); /* set inital registers */ ret = gc0310_write_reg_array(client, gc0310_reset_register); /* restore settings */ gc0310_res = gc0310_res_preview; N_RES = N_RES_PREVIEW; mutex_unlock(&dev->input_lock); pr_info("%s E\n", __func__); return 0; } static int power_ctrl(struct v4l2_subdev *sd, bool flag) { int ret = 0; struct gc0310_device *dev = to_gc0310_sensor(sd); if (!dev || !dev->platform_data) return -ENODEV; if (flag) { /* The upstream module driver (written to Crystal * Cove) had this logic to pulse the rails low first. * This appears to break things on the MRD7 with the * X-Powers PMIC... * * ret = dev->platform_data->v1p8_ctrl(sd, 0); * ret |= dev->platform_data->v2p8_ctrl(sd, 0); * mdelay(50); */ ret |= dev->platform_data->v1p8_ctrl(sd, 1); ret |= dev->platform_data->v2p8_ctrl(sd, 1); usleep_range(10000, 15000); } if (!flag || ret) { ret |= dev->platform_data->v1p8_ctrl(sd, 0); ret |= dev->platform_data->v2p8_ctrl(sd, 0); } return ret; } static int gpio_ctrl(struct v4l2_subdev *sd, bool flag) { int ret; struct gc0310_device *dev = to_gc0310_sensor(sd); if (!dev || !dev->platform_data) return -ENODEV; /* GPIO0 == "reset" (active low), GPIO1 == "power down" */ if (flag) { /* Pulse reset, then release power down */ ret = dev->platform_data->gpio0_ctrl(sd, 0); usleep_range(5000, 10000); ret |= dev->platform_data->gpio0_ctrl(sd, 1); usleep_range(10000, 15000); ret |= dev->platform_data->gpio1_ctrl(sd, 0); usleep_range(10000, 15000); } else { ret = dev->platform_data->gpio1_ctrl(sd, 1); ret |= dev->platform_data->gpio0_ctrl(sd, 0); } return ret; } static int power_down(struct v4l2_subdev *sd); static int power_up(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; pr_info("%s S\n", __func__); if (!dev->platform_data) { dev_err(&client->dev, "no camera_sensor_platform_data"); return -ENODEV; } /* power control */ ret = power_ctrl(sd, 1); if (ret) goto fail_power; /* flis clock control */ ret = dev->platform_data->flisclk_ctrl(sd, 1); if (ret) goto fail_clk; /* gpio ctrl */ ret = gpio_ctrl(sd, 1); if (ret) { ret = gpio_ctrl(sd, 1); if (ret) goto fail_gpio; } msleep(100); pr_info("%s E\n", __func__); return 0; fail_gpio: dev->platform_data->flisclk_ctrl(sd, 0); fail_clk: power_ctrl(sd, 0); fail_power: dev_err(&client->dev, "sensor power-up failed\n"); return ret; } static int power_down(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; if (!dev->platform_data) { dev_err(&client->dev, "no camera_sensor_platform_data"); return -ENODEV; } /* gpio ctrl */ ret = gpio_ctrl(sd, 0); if (ret) { ret = gpio_ctrl(sd, 0); if (ret) dev_err(&client->dev, "gpio failed 2\n"); } ret = dev->platform_data->flisclk_ctrl(sd, 0); if (ret) dev_err(&client->dev, "flisclk failed\n"); /* power control */ ret = power_ctrl(sd, 0); if (ret) dev_err(&client->dev, "vprog failed.\n"); return ret; } static int gc0310_s_power(struct v4l2_subdev *sd, int on) { int ret; if (on == 0) return power_down(sd); else { ret = power_up(sd); if (!ret) return gc0310_init(sd); } return ret; } /* * distance - calculate the distance * @res: resolution * @w: width * @h: height * * Get the gap between resolution and w/h. * res->width/height smaller than w/h wouldn't be considered. * Returns the value of gap or -1 if fail. */ #define LARGEST_ALLOWED_RATIO_MISMATCH 800 static int distance(struct gc0310_resolution *res, u32 w, u32 h) { unsigned int w_ratio = (res->width << 13) / w; unsigned int h_ratio; int match; if (h == 0) return -1; h_ratio = (res->height << 13) / h; if (h_ratio == 0) return -1; match = abs(((w_ratio << 13) / h_ratio) - ((int)8192)); if ((w_ratio < (int)8192) || (h_ratio < (int)8192) || (match > LARGEST_ALLOWED_RATIO_MISMATCH)) return -1; return w_ratio + h_ratio; } /* Return the nearest higher resolution index */ static int nearest_resolution_index(int w, int h) { int i; int idx = -1; int dist; int min_dist = INT_MAX; struct gc0310_resolution *tmp_res = NULL; for (i = 0; i < N_RES; i++) { tmp_res = &gc0310_res[i]; dist = distance(tmp_res, w, h); if (dist == -1) continue; if (dist < min_dist) { min_dist = dist; idx = i; } } return idx; } static int get_resolution_index(int w, int h) { int i; for (i = 0; i < N_RES; i++) { if (w != gc0310_res[i].width) continue; if (h != gc0310_res[i].height) continue; return i; } return -1; } /* TODO: remove it. */ static int startup(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; pr_info("%s S\n", __func__); ret = gc0310_write_reg_array(client, gc0310_res[dev->fmt_idx].regs); if (ret) { dev_err(&client->dev, "gc0310 write register err.\n"); return ret; } pr_info("%s E\n", __func__); return ret; } static int gc0310_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *fmt = &format->format; struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); struct camera_mipi_info *gc0310_info = NULL; int ret = 0; int idx = 0; pr_info("%s S\n", __func__); if (format->pad) return -EINVAL; if (!fmt) return -EINVAL; gc0310_info = v4l2_get_subdev_hostdata(sd); if (!gc0310_info) return -EINVAL; mutex_lock(&dev->input_lock); idx = nearest_resolution_index(fmt->width, fmt->height); if (idx == -1) { /* return the largest resolution */ fmt->width = gc0310_res[N_RES - 1].width; fmt->height = gc0310_res[N_RES - 1].height; } else { fmt->width = gc0310_res[idx].width; fmt->height = gc0310_res[idx].height; } fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; if (format->which == V4L2_SUBDEV_FORMAT_TRY) { cfg->try_fmt = *fmt; mutex_unlock(&dev->input_lock); return 0; } dev->fmt_idx = get_resolution_index(fmt->width, fmt->height); if (dev->fmt_idx == -1) { dev_err(&client->dev, "get resolution fail\n"); mutex_unlock(&dev->input_lock); return -EINVAL; } printk("%s: before gc0310_write_reg_array %s\n", __FUNCTION__, gc0310_res[dev->fmt_idx].desc); ret = startup(sd); if (ret) { dev_err(&client->dev, "gc0310 startup err\n"); goto err; } ret = gc0310_get_intg_factor(client, gc0310_info, &gc0310_res[dev->fmt_idx]); if (ret) { dev_err(&client->dev, "failed to get integration_factor\n"); goto err; } pr_info("%s E\n", __func__); err: mutex_unlock(&dev->input_lock); return ret; } static int gc0310_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *fmt = &format->format; struct gc0310_device *dev = to_gc0310_sensor(sd); if (format->pad) return -EINVAL; if (!fmt) return -EINVAL; fmt->width = gc0310_res[dev->fmt_idx].width; fmt->height = gc0310_res[dev->fmt_idx].height; fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; return 0; } static int gc0310_detect(struct i2c_client *client) { struct i2c_adapter *adapter = client->adapter; u8 high, low; int ret; u16 id; pr_info("%s S\n", __func__); if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) return -ENODEV; ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_SC_CMMN_CHIP_ID_H, &high); if (ret) { dev_err(&client->dev, "read sensor_id_high failed\n"); return -ENODEV; } ret = gc0310_read_reg(client, GC0310_8BIT, GC0310_SC_CMMN_CHIP_ID_L, &low); if (ret) { dev_err(&client->dev, "read sensor_id_low failed\n"); return -ENODEV; } id = ((((u16) high) << 8) | (u16) low); pr_info("sensor ID = 0x%x\n", id); if (id != GC0310_ID) { dev_err(&client->dev, "sensor ID error, read id = 0x%x, target id = 0x%x\n", id, GC0310_ID); return -ENODEV; } dev_dbg(&client->dev, "detect gc0310 success\n"); pr_info("%s E\n", __func__); return 0; } static int gc0310_s_stream(struct v4l2_subdev *sd, int enable) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; pr_info("%s S enable=%d\n", __func__, enable); mutex_lock(&dev->input_lock); if (enable) { /* enable per frame MIPI and sensor ctrl reset */ ret = gc0310_write_reg(client, GC0310_8BIT, 0xFE, 0x30); if (ret) { mutex_unlock(&dev->input_lock); return ret; } } ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_RESET_RELATED, GC0310_REGISTER_PAGE_3); if (ret) { mutex_unlock(&dev->input_lock); return ret; } ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_SW_STREAM, enable ? GC0310_START_STREAMING : GC0310_STOP_STREAMING); if (ret) { mutex_unlock(&dev->input_lock); return ret; } ret = gc0310_write_reg(client, GC0310_8BIT, GC0310_RESET_RELATED, GC0310_REGISTER_PAGE_0); if (ret) { mutex_unlock(&dev->input_lock); return ret; } mutex_unlock(&dev->input_lock); pr_info("%s E\n", __func__); return ret; } static int gc0310_s_config(struct v4l2_subdev *sd, int irq, void *platform_data) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; pr_info("%s S\n", __func__); if (!platform_data) return -ENODEV; dev->platform_data = (struct camera_sensor_platform_data *)platform_data; mutex_lock(&dev->input_lock); /* power off the module, then power on it in future * as first power on by board may not fulfill the * power on sequqence needed by the module */ ret = power_down(sd); if (ret) { dev_err(&client->dev, "gc0310 power-off err.\n"); goto fail_power_off; } ret = power_up(sd); if (ret) { dev_err(&client->dev, "gc0310 power-up err.\n"); goto fail_power_on; } ret = dev->platform_data->csi_cfg(sd, 1); if (ret) goto fail_csi_cfg; /* config & detect sensor */ ret = gc0310_detect(client); if (ret) { dev_err(&client->dev, "gc0310_detect err s_config.\n"); goto fail_csi_cfg; } /* turn off sensor, after probed */ ret = power_down(sd); if (ret) { dev_err(&client->dev, "gc0310 power-off err.\n"); goto fail_csi_cfg; } mutex_unlock(&dev->input_lock); pr_info("%s E\n", __func__); return 0; fail_csi_cfg: dev->platform_data->csi_cfg(sd, 0); fail_power_on: power_down(sd); dev_err(&client->dev, "sensor power-gating failed\n"); fail_power_off: mutex_unlock(&dev->input_lock); return ret; } static int gc0310_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *param) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); if (!param) return -EINVAL; if (param->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { dev_err(&client->dev, "unsupported buffer type.\n"); return -EINVAL; } memset(param, 0, sizeof(*param)); param->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (dev->fmt_idx >= 0 && dev->fmt_idx < N_RES) { param->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; param->parm.capture.timeperframe.numerator = 1; param->parm.capture.capturemode = dev->run_mode; param->parm.capture.timeperframe.denominator = gc0310_res[dev->fmt_idx].fps; } return 0; } static int gc0310_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *param) { struct gc0310_device *dev = to_gc0310_sensor(sd); dev->run_mode = param->parm.capture.capturemode; mutex_lock(&dev->input_lock); switch (dev->run_mode) { case CI_MODE_VIDEO: gc0310_res = gc0310_res_video; N_RES = N_RES_VIDEO; break; case CI_MODE_STILL_CAPTURE: gc0310_res = gc0310_res_still; N_RES = N_RES_STILL; break; default: gc0310_res = gc0310_res_preview; N_RES = N_RES_PREVIEW; } mutex_unlock(&dev->input_lock); return 0; } static int gc0310_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *interval) { struct gc0310_device *dev = to_gc0310_sensor(sd); interval->interval.numerator = 1; interval->interval.denominator = gc0310_res[dev->fmt_idx].fps; return 0; } static int gc0310_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { if (code->index >= MAX_FMTS) return -EINVAL; code->code = MEDIA_BUS_FMT_SGRBG8_1X8; return 0; } static int gc0310_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { int index = fse->index; if (index >= N_RES) return -EINVAL; fse->min_width = gc0310_res[index].width; fse->min_height = gc0310_res[index].height; fse->max_width = gc0310_res[index].width; fse->max_height = gc0310_res[index].height; return 0; } static int gc0310_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) { struct gc0310_device *dev = to_gc0310_sensor(sd); mutex_lock(&dev->input_lock); *frames = gc0310_res[dev->fmt_idx].skip_frames; mutex_unlock(&dev->input_lock); return 0; } static const struct v4l2_subdev_sensor_ops gc0310_sensor_ops = { .g_skip_frames = gc0310_g_skip_frames, }; static const struct v4l2_subdev_video_ops gc0310_video_ops = { .s_stream = gc0310_s_stream, .g_parm = gc0310_g_parm, .s_parm = gc0310_s_parm, .g_frame_interval = gc0310_g_frame_interval, }; static const struct v4l2_subdev_core_ops gc0310_core_ops = { .s_power = gc0310_s_power, .ioctl = gc0310_ioctl, }; static const struct v4l2_subdev_pad_ops gc0310_pad_ops = { .enum_mbus_code = gc0310_enum_mbus_code, .enum_frame_size = gc0310_enum_frame_size, .get_fmt = gc0310_get_fmt, .set_fmt = gc0310_set_fmt, }; static const struct v4l2_subdev_ops gc0310_ops = { .core = &gc0310_core_ops, .video = &gc0310_video_ops, .pad = &gc0310_pad_ops, .sensor = &gc0310_sensor_ops, }; static int gc0310_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct gc0310_device *dev = to_gc0310_sensor(sd); dev_dbg(&client->dev, "gc0310_remove...\n"); dev->platform_data->csi_cfg(sd, 0); v4l2_device_unregister_subdev(sd); media_entity_cleanup(&dev->sd.entity); v4l2_ctrl_handler_free(&dev->ctrl_handler); kfree(dev); return 0; } static int gc0310_probe(struct i2c_client *client) { struct gc0310_device *dev; int ret; void *pdata; unsigned int i; pr_info("%s S\n", __func__); dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (!dev) return -ENOMEM; mutex_init(&dev->input_lock); dev->fmt_idx = 0; v4l2_i2c_subdev_init(&(dev->sd), client, &gc0310_ops); pdata = gmin_camera_platform_data(&dev->sd, ATOMISP_INPUT_FORMAT_RAW_8, atomisp_bayer_order_grbg); if (!pdata) { ret = -EINVAL; goto out_free; } ret = gc0310_s_config(&dev->sd, client->irq, pdata); if (ret) goto out_free; ret = atomisp_register_i2c_module(&dev->sd, pdata, RAW_CAMERA); if (ret) goto out_free; dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; dev->pad.flags = MEDIA_PAD_FL_SOURCE; dev->format.code = MEDIA_BUS_FMT_SGRBG8_1X8; dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = v4l2_ctrl_handler_init(&dev->ctrl_handler, ARRAY_SIZE(gc0310_controls)); if (ret) { gc0310_remove(client); return ret; } for (i = 0; i < ARRAY_SIZE(gc0310_controls); i++) v4l2_ctrl_new_custom(&dev->ctrl_handler, &gc0310_controls[i], NULL); if (dev->ctrl_handler.error) { gc0310_remove(client); return dev->ctrl_handler.error; } /* Use same lock for controls as for everything else. */ dev->ctrl_handler.lock = &dev->input_lock; dev->sd.ctrl_handler = &dev->ctrl_handler; ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); if (ret) gc0310_remove(client); pr_info("%s E\n", __func__); return ret; out_free: v4l2_device_unregister_subdev(&dev->sd); kfree(dev); return ret; } static const struct acpi_device_id gc0310_acpi_match[] = { {"XXGC0310"}, {"INT0310"}, {}, }; MODULE_DEVICE_TABLE(acpi, gc0310_acpi_match); static struct i2c_driver gc0310_driver = { .driver = { .name = "gc0310", .acpi_match_table = gc0310_acpi_match, }, .probe_new = gc0310_probe, .remove = gc0310_remove, }; module_i2c_driver(gc0310_driver); MODULE_AUTHOR("Lai, Angie "); MODULE_DESCRIPTION("A low-level driver for GalaxyCore GC0310 sensors"); MODULE_LICENSE("GPL");