| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Support for GalaxyCore GC2235 2M camera sensor. |
| * |
| * Copyright (c) 2014 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 <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/kmod.h> |
| #include <linux/device.h> |
| #include <linux/delay.h> |
| #include <linux/slab.h> |
| #include <linux/i2c.h> |
| #include <linux/moduleparam.h> |
| #include <media/v4l2-device.h> |
| #include "../include/linux/atomisp_gmin_platform.h" |
| #include <linux/acpi.h> |
| #include <linux/io.h> |
| |
| #include "gc2235.h" |
| |
| /* i2c read/write stuff */ |
| static int gc2235_read_reg(struct i2c_client *client, |
| u16 data_length, u16 reg, u16 *val) |
| { |
| int err; |
| struct i2c_msg msg[2]; |
| unsigned char data[6]; |
| |
| if (!client->adapter) { |
| dev_err(&client->dev, "%s error, no client->adapter\n", |
| __func__); |
| return -ENODEV; |
| } |
| |
| if (data_length != GC2235_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 = 1; |
| 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 == GC2235_8BIT) |
| *val = (u8)data[0]; |
| |
| return 0; |
| } |
| |
| static int gc2235_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 gc2235_write_reg(struct i2c_client *client, u16 data_length, |
| u8 reg, u8 val) |
| { |
| int ret; |
| unsigned char data[4] = {0}; |
| const u16 len = data_length + sizeof(u8); /* 16-bit address + data */ |
| |
| if (data_length != GC2235_8BIT) { |
| dev_err(&client->dev, |
| "%s error, invalid data_length\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* high byte goes out first */ |
| data[0] = reg; |
| data[1] = val; |
| |
| ret = gc2235_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; |
| } |
| |
| static int __gc2235_flush_reg_array(struct i2c_client *client, |
| struct gc2235_write_ctrl *ctrl) |
| { |
| u16 size; |
| |
| if (ctrl->index == 0) |
| return 0; |
| |
| size = sizeof(u8) + ctrl->index; /* 8-bit address + data */ |
| ctrl->index = 0; |
| |
| return gc2235_i2c_write(client, size, (u8 *)&ctrl->buffer); |
| } |
| |
| static int __gc2235_buf_reg_array(struct i2c_client *client, |
| struct gc2235_write_ctrl *ctrl, |
| const struct gc2235_reg *next) |
| { |
| int size; |
| |
| if (next->type != GC2235_8BIT) |
| return -EINVAL; |
| |
| size = 1; |
| ctrl->buffer.data[ctrl->index] = (u8)next->val; |
| |
| /* 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) >= GC2235_MAX_WRITE_BUF_SIZE) |
| return __gc2235_flush_reg_array(client, ctrl); |
| |
| return 0; |
| } |
| |
| static int __gc2235_write_reg_is_consecutive(struct i2c_client *client, |
| struct gc2235_write_ctrl *ctrl, |
| const struct gc2235_reg *next) |
| { |
| if (ctrl->index == 0) |
| return 1; |
| |
| return ctrl->buffer.addr + ctrl->index == next->reg; |
| } |
| |
| static int gc2235_write_reg_array(struct i2c_client *client, |
| const struct gc2235_reg *reglist) |
| { |
| const struct gc2235_reg *next = reglist; |
| struct gc2235_write_ctrl ctrl; |
| int err; |
| |
| ctrl.index = 0; |
| for (; next->type != GC2235_TOK_TERM; next++) { |
| switch (next->type & GC2235_TOK_MASK) { |
| case GC2235_TOK_DELAY: |
| err = __gc2235_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 (!__gc2235_write_reg_is_consecutive(client, &ctrl, |
| next)) { |
| err = __gc2235_flush_reg_array(client, &ctrl); |
| if (err) |
| return err; |
| } |
| err = __gc2235_buf_reg_array(client, &ctrl, next); |
| if (err) { |
| dev_err(&client->dev, "%s: write error, aborted\n", |
| __func__); |
| return err; |
| } |
| break; |
| } |
| } |
| |
| return __gc2235_flush_reg_array(client, &ctrl); |
| } |
| |
| static int gc2235_g_focal(struct v4l2_subdev *sd, s32 *val) |
| { |
| *val = (GC2235_FOCAL_LENGTH_NUM << 16) | GC2235_FOCAL_LENGTH_DEM; |
| return 0; |
| } |
| |
| static int gc2235_g_fnumber(struct v4l2_subdev *sd, s32 *val) |
| { |
| /*const f number for imx*/ |
| *val = (GC2235_F_NUMBER_DEFAULT_NUM << 16) | GC2235_F_NUMBER_DEM; |
| return 0; |
| } |
| |
| static int gc2235_g_fnumber_range(struct v4l2_subdev *sd, s32 *val) |
| { |
| *val = (GC2235_F_NUMBER_DEFAULT_NUM << 24) | |
| (GC2235_F_NUMBER_DEM << 16) | |
| (GC2235_F_NUMBER_DEFAULT_NUM << 8) | GC2235_F_NUMBER_DEM; |
| return 0; |
| } |
| |
| static int gc2235_get_intg_factor(struct i2c_client *client, |
| struct camera_mipi_info *info, |
| const struct gc2235_resolution *res) |
| { |
| struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| struct atomisp_sensor_mode_data *buf = &info->data; |
| u16 reg_val, reg_val_h; |
| int ret; |
| |
| if (!info) |
| return -EINVAL; |
| |
| /* pixel clock calculattion */ |
| buf->vt_pix_clk_freq_mhz = dev->vt_pix_clk_freq_mhz = 30000000; |
| |
| /* get integration time */ |
| buf->coarse_integration_time_min = GC2235_COARSE_INTG_TIME_MIN; |
| buf->coarse_integration_time_max_margin = |
| GC2235_COARSE_INTG_TIME_MAX_MARGIN; |
| |
| buf->fine_integration_time_min = GC2235_FINE_INTG_TIME_MIN; |
| buf->fine_integration_time_max_margin = |
| GC2235_FINE_INTG_TIME_MAX_MARGIN; |
| |
| buf->fine_integration_time_def = GC2235_FINE_INTG_TIME_MIN; |
| buf->frame_length_lines = res->lines_per_frame; |
| buf->line_length_pck = res->pixels_per_line; |
| buf->read_mode = res->bin_mode; |
| |
| /* get the cropping and output resolution to ISP for this mode. */ |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_H_CROP_START_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_H_CROP_START_L, ®_val); |
| if (ret) |
| return ret; |
| |
| buf->crop_horizontal_start = (reg_val_h << 8) | reg_val; |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_V_CROP_START_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_V_CROP_START_L, ®_val); |
| if (ret) |
| return ret; |
| |
| buf->crop_vertical_start = (reg_val_h << 8) | reg_val; |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_H_OUTSIZE_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_H_OUTSIZE_L, ®_val); |
| if (ret) |
| return ret; |
| buf->output_width = (reg_val_h << 8) | reg_val; |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_V_OUTSIZE_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_V_OUTSIZE_L, ®_val); |
| if (ret) |
| return ret; |
| buf->output_height = (reg_val_h << 8) | reg_val; |
| |
| buf->crop_horizontal_end = buf->crop_horizontal_start + |
| buf->output_width - 1; |
| buf->crop_vertical_end = buf->crop_vertical_start + |
| buf->output_height - 1; |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_HB_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_HB_L, ®_val); |
| if (ret) |
| return ret; |
| |
| #if 0 |
| u16 dummy = (reg_val_h << 8) | reg_val; |
| #endif |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_SH_DELAY_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_SH_DELAY_L, ®_val); |
| |
| #if 0 |
| buf->line_length_pck = buf->output_width + 16 + dummy + |
| (((u16)reg_val_h << 8) | (u16)reg_val) + 4; |
| #endif |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_VB_H, ®_val_h); |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_VB_L, ®_val); |
| if (ret) |
| return ret; |
| |
| #if 0 |
| buf->frame_length_lines = buf->output_height + 32 + |
| (((u16)reg_val_h << 8) | (u16)reg_val); |
| #endif |
| 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 long __gc2235_set_exposure(struct v4l2_subdev *sd, int coarse_itg, |
| int gain, int digitgain) |
| |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| u16 coarse_integration = (u16)coarse_itg; |
| int ret = 0; |
| u16 expo_coarse_h, expo_coarse_l, gain_val = 0xF0, gain_val2 = 0xF0; |
| |
| expo_coarse_h = coarse_integration >> 8; |
| expo_coarse_l = coarse_integration & 0xff; |
| |
| ret = gc2235_write_reg(client, GC2235_8BIT, |
| GC2235_EXPOSURE_H, expo_coarse_h); |
| ret = gc2235_write_reg(client, GC2235_8BIT, |
| GC2235_EXPOSURE_L, expo_coarse_l); |
| |
| if (gain <= 0x58) { |
| gain_val = 0x40; |
| gain_val2 = 0x58; |
| } else if (gain < 256) { |
| gain_val = 0x40; |
| gain_val2 = gain; |
| } else { |
| gain_val2 = 64 * gain / 256; |
| gain_val = 0xff; |
| } |
| |
| ret = gc2235_write_reg(client, GC2235_8BIT, |
| GC2235_GLOBAL_GAIN, (u8)gain_val); |
| ret = gc2235_write_reg(client, GC2235_8BIT, |
| GC2235_PRE_GAIN, (u8)gain_val2); |
| |
| return ret; |
| } |
| |
| static int gc2235_set_exposure(struct v4l2_subdev *sd, int exposure, |
| int gain, int digitgain) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| int ret; |
| |
| mutex_lock(&dev->input_lock); |
| ret = __gc2235_set_exposure(sd, exposure, gain, digitgain); |
| mutex_unlock(&dev->input_lock); |
| |
| return ret; |
| } |
| |
| static long gc2235_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 gc2235_set_exposure(sd, exp, gain, digitgain); |
| } |
| |
| static long gc2235_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) |
| { |
| switch (cmd) { |
| case ATOMISP_IOC_S_EXPOSURE: |
| return gc2235_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 gc2235_q_exposure(struct v4l2_subdev *sd, s32 *value) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| u16 reg_v, reg_v2; |
| int ret; |
| |
| /* get exposure */ |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_EXPOSURE_L, |
| ®_v); |
| if (ret) |
| goto err; |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_EXPOSURE_H, |
| ®_v2); |
| if (ret) |
| goto err; |
| |
| reg_v += reg_v2 << 8; |
| |
| *value = reg_v; |
| err: |
| return ret; |
| } |
| |
| static int gc2235_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct gc2235_device *dev = |
| container_of(ctrl->handler, struct gc2235_device, ctrl_handler); |
| int ret = 0; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_EXPOSURE_ABSOLUTE: |
| ret = gc2235_q_exposure(&dev->sd, &ctrl->val); |
| break; |
| case V4L2_CID_FOCAL_ABSOLUTE: |
| ret = gc2235_g_focal(&dev->sd, &ctrl->val); |
| break; |
| case V4L2_CID_FNUMBER_ABSOLUTE: |
| ret = gc2235_g_fnumber(&dev->sd, &ctrl->val); |
| break; |
| case V4L2_CID_FNUMBER_RANGE: |
| ret = gc2235_g_fnumber_range(&dev->sd, &ctrl->val); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static const struct v4l2_ctrl_ops ctrl_ops = { |
| .g_volatile_ctrl = gc2235_g_volatile_ctrl |
| }; |
| |
| static struct v4l2_ctrl_config gc2235_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_FOCAL_ABSOLUTE, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .name = "focal length", |
| .min = GC2235_FOCAL_LENGTH_DEFAULT, |
| .max = GC2235_FOCAL_LENGTH_DEFAULT, |
| .step = 0x01, |
| .def = GC2235_FOCAL_LENGTH_DEFAULT, |
| .flags = 0, |
| }, |
| { |
| .ops = &ctrl_ops, |
| .id = V4L2_CID_FNUMBER_ABSOLUTE, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .name = "f-number", |
| .min = GC2235_F_NUMBER_DEFAULT, |
| .max = GC2235_F_NUMBER_DEFAULT, |
| .step = 0x01, |
| .def = GC2235_F_NUMBER_DEFAULT, |
| .flags = 0, |
| }, |
| { |
| .ops = &ctrl_ops, |
| .id = V4L2_CID_FNUMBER_RANGE, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .name = "f-number range", |
| .min = GC2235_F_NUMBER_RANGE, |
| .max = GC2235_F_NUMBER_RANGE, |
| .step = 0x01, |
| .def = GC2235_F_NUMBER_RANGE, |
| .flags = 0, |
| }, |
| }; |
| |
| static int __gc2235_init(struct v4l2_subdev *sd) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| |
| /* restore settings */ |
| gc2235_res = gc2235_res_preview; |
| N_RES = N_RES_PREVIEW; |
| |
| return gc2235_write_reg_array(client, gc2235_init_settings); |
| } |
| |
| static int is_init; |
| |
| static int power_ctrl(struct v4l2_subdev *sd, bool flag) |
| { |
| int ret = -1; |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| |
| if (!dev || !dev->platform_data) |
| return -ENODEV; |
| |
| if (flag) { |
| ret = dev->platform_data->v1p8_ctrl(sd, 1); |
| usleep_range(60, 90); |
| if (ret == 0) |
| ret |= dev->platform_data->v2p8_ctrl(sd, 1); |
| } else { |
| 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) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| int ret = -1; |
| |
| if (!dev || !dev->platform_data) |
| return -ENODEV; |
| |
| ret |= dev->platform_data->gpio1_ctrl(sd, !flag); |
| usleep_range(60, 90); |
| return dev->platform_data->gpio0_ctrl(sd, flag); |
| } |
| |
| static int power_up(struct v4l2_subdev *sd) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| int ret; |
| |
| 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; |
| |
| /* according to DS, at least 5ms is needed between DOVDD and PWDN */ |
| usleep_range(5000, 6000); |
| |
| ret = dev->platform_data->flisclk_ctrl(sd, 1); |
| if (ret) |
| goto fail_clk; |
| usleep_range(5000, 6000); |
| |
| /* gpio ctrl */ |
| ret = gpio_ctrl(sd, 1); |
| if (ret) { |
| ret = gpio_ctrl(sd, 1); |
| if (ret) |
| goto fail_power; |
| } |
| |
| msleep(5); |
| return 0; |
| |
| fail_clk: |
| gpio_ctrl(sd, 0); |
| fail_power: |
| power_ctrl(sd, 0); |
| dev_err(&client->dev, "sensor power-up failed\n"); |
| |
| return ret; |
| } |
| |
| static int power_down(struct v4l2_subdev *sd) |
| { |
| struct gc2235_device *dev = to_gc2235_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 gc2235_s_power(struct v4l2_subdev *sd, int on) |
| { |
| int ret; |
| |
| if (on == 0) |
| ret = power_down(sd); |
| else { |
| ret = power_up(sd); |
| if (!ret) |
| ret = __gc2235_init(sd); |
| is_init = 1; |
| } |
| 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 gc2235_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) - 8192); |
| |
| if ((w_ratio < 8192) || (h_ratio < 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 gc2235_resolution *tmp_res = NULL; |
| |
| for (i = 0; i < N_RES; i++) { |
| tmp_res = &gc2235_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 != gc2235_res[i].width) |
| continue; |
| if (h != gc2235_res[i].height) |
| continue; |
| |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| static int startup(struct v4l2_subdev *sd) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| int ret = 0; |
| |
| if (is_init == 0) { |
| /* force gc2235 to do a reset in res change, otherwise it |
| * can not output normal after switching res. and it is not |
| * necessary for first time run up after power on, for the sack |
| * of performance |
| */ |
| power_down(sd); |
| power_up(sd); |
| gc2235_write_reg_array(client, gc2235_init_settings); |
| } |
| |
| ret = gc2235_write_reg_array(client, gc2235_res[dev->fmt_idx].regs); |
| if (ret) { |
| dev_err(&client->dev, "gc2235 write register err.\n"); |
| return ret; |
| } |
| is_init = 0; |
| |
| return ret; |
| } |
| |
| static int gc2235_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 gc2235_device *dev = to_gc2235_sensor(sd); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct camera_mipi_info *gc2235_info = NULL; |
| int ret = 0; |
| int idx; |
| |
| gc2235_info = v4l2_get_subdev_hostdata(sd); |
| if (!gc2235_info) |
| return -EINVAL; |
| if (format->pad) |
| return -EINVAL; |
| if (!fmt) |
| return -EINVAL; |
| mutex_lock(&dev->input_lock); |
| idx = nearest_resolution_index(fmt->width, fmt->height); |
| if (idx == -1) { |
| /* return the largest resolution */ |
| fmt->width = gc2235_res[N_RES - 1].width; |
| fmt->height = gc2235_res[N_RES - 1].height; |
| } else { |
| fmt->width = gc2235_res[idx].width; |
| fmt->height = gc2235_res[idx].height; |
| } |
| fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; |
| 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; |
| } |
| |
| ret = startup(sd); |
| if (ret) { |
| dev_err(&client->dev, "gc2235 startup err\n"); |
| goto err; |
| } |
| |
| ret = gc2235_get_intg_factor(client, gc2235_info, |
| &gc2235_res[dev->fmt_idx]); |
| if (ret) |
| dev_err(&client->dev, "failed to get integration_factor\n"); |
| |
| err: |
| mutex_unlock(&dev->input_lock); |
| return ret; |
| } |
| |
| static int gc2235_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 gc2235_device *dev = to_gc2235_sensor(sd); |
| |
| if (format->pad) |
| return -EINVAL; |
| |
| if (!fmt) |
| return -EINVAL; |
| |
| fmt->width = gc2235_res[dev->fmt_idx].width; |
| fmt->height = gc2235_res[dev->fmt_idx].height; |
| fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; |
| |
| return 0; |
| } |
| |
| static int gc2235_detect(struct i2c_client *client) |
| { |
| struct i2c_adapter *adapter = client->adapter; |
| u16 high, low; |
| int ret; |
| u16 id; |
| |
| if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) |
| return -ENODEV; |
| |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_SENSOR_ID_H, &high); |
| if (ret) { |
| dev_err(&client->dev, "sensor_id_high = 0x%x\n", high); |
| return -ENODEV; |
| } |
| ret = gc2235_read_reg(client, GC2235_8BIT, |
| GC2235_SENSOR_ID_L, &low); |
| id = ((high << 8) | low); |
| |
| if (id != GC2235_ID) { |
| dev_err(&client->dev, "sensor ID error, 0x%x\n", id); |
| return -ENODEV; |
| } |
| |
| dev_info(&client->dev, "detect gc2235 success\n"); |
| return 0; |
| } |
| |
| static int gc2235_s_stream(struct v4l2_subdev *sd, int enable) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| int ret; |
| |
| mutex_lock(&dev->input_lock); |
| |
| if (enable) |
| ret = gc2235_write_reg_array(client, gc2235_stream_on); |
| else |
| ret = gc2235_write_reg_array(client, gc2235_stream_off); |
| |
| mutex_unlock(&dev->input_lock); |
| return ret; |
| } |
| |
| static int gc2235_s_config(struct v4l2_subdev *sd, |
| int irq, void *platform_data) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| int ret = 0; |
| |
| 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, "gc2235 power-off err.\n"); |
| goto fail_power_off; |
| } |
| |
| ret = power_up(sd); |
| if (ret) { |
| dev_err(&client->dev, "gc2235 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 = gc2235_detect(client); |
| if (ret) { |
| dev_err(&client->dev, "gc2235_detect err s_config.\n"); |
| goto fail_csi_cfg; |
| } |
| |
| /* turn off sensor, after probed */ |
| ret = power_down(sd); |
| if (ret) { |
| dev_err(&client->dev, "gc2235 power-off err.\n"); |
| goto fail_csi_cfg; |
| } |
| mutex_unlock(&dev->input_lock); |
| |
| 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 gc2235_g_frame_interval(struct v4l2_subdev *sd, |
| struct v4l2_subdev_frame_interval *interval) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| |
| interval->interval.numerator = 1; |
| interval->interval.denominator = gc2235_res[dev->fmt_idx].fps; |
| |
| return 0; |
| } |
| |
| static int gc2235_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_SBGGR10_1X10; |
| return 0; |
| } |
| |
| static int gc2235_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 = gc2235_res[index].width; |
| fse->min_height = gc2235_res[index].height; |
| fse->max_width = gc2235_res[index].width; |
| fse->max_height = gc2235_res[index].height; |
| |
| return 0; |
| } |
| |
| static int gc2235_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) |
| { |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| |
| mutex_lock(&dev->input_lock); |
| *frames = gc2235_res[dev->fmt_idx].skip_frames; |
| mutex_unlock(&dev->input_lock); |
| |
| return 0; |
| } |
| |
| static const struct v4l2_subdev_sensor_ops gc2235_sensor_ops = { |
| .g_skip_frames = gc2235_g_skip_frames, |
| }; |
| |
| static const struct v4l2_subdev_video_ops gc2235_video_ops = { |
| .s_stream = gc2235_s_stream, |
| .g_frame_interval = gc2235_g_frame_interval, |
| }; |
| |
| static const struct v4l2_subdev_core_ops gc2235_core_ops = { |
| .s_power = gc2235_s_power, |
| .ioctl = gc2235_ioctl, |
| }; |
| |
| static const struct v4l2_subdev_pad_ops gc2235_pad_ops = { |
| .enum_mbus_code = gc2235_enum_mbus_code, |
| .enum_frame_size = gc2235_enum_frame_size, |
| .get_fmt = gc2235_get_fmt, |
| .set_fmt = gc2235_set_fmt, |
| }; |
| |
| static const struct v4l2_subdev_ops gc2235_ops = { |
| .core = &gc2235_core_ops, |
| .video = &gc2235_video_ops, |
| .pad = &gc2235_pad_ops, |
| .sensor = &gc2235_sensor_ops, |
| }; |
| |
| static int gc2235_remove(struct i2c_client *client) |
| { |
| struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| struct gc2235_device *dev = to_gc2235_sensor(sd); |
| |
| dev_dbg(&client->dev, "gc2235_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 gc2235_probe(struct i2c_client *client) |
| { |
| struct gc2235_device *dev; |
| void *gcpdev; |
| int ret; |
| unsigned int i; |
| |
| 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, &gc2235_ops); |
| |
| gcpdev = gmin_camera_platform_data(&dev->sd, |
| ATOMISP_INPUT_FORMAT_RAW_10, |
| atomisp_bayer_order_grbg); |
| |
| ret = gc2235_s_config(&dev->sd, client->irq, gcpdev); |
| 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_SBGGR10_1X10; |
| dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; |
| ret = |
| v4l2_ctrl_handler_init(&dev->ctrl_handler, |
| ARRAY_SIZE(gc2235_controls)); |
| if (ret) { |
| gc2235_remove(client); |
| return ret; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(gc2235_controls); i++) |
| v4l2_ctrl_new_custom(&dev->ctrl_handler, &gc2235_controls[i], |
| NULL); |
| |
| if (dev->ctrl_handler.error) { |
| gc2235_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) |
| gc2235_remove(client); |
| |
| return atomisp_register_i2c_module(&dev->sd, gcpdev, RAW_CAMERA); |
| |
| out_free: |
| v4l2_device_unregister_subdev(&dev->sd); |
| kfree(dev); |
| |
| return ret; |
| } |
| |
| static const struct acpi_device_id gc2235_acpi_match[] = { |
| { "INT33F8" }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(acpi, gc2235_acpi_match); |
| |
| static struct i2c_driver gc2235_driver = { |
| .driver = { |
| .name = "gc2235", |
| .acpi_match_table = gc2235_acpi_match, |
| }, |
| .probe_new = gc2235_probe, |
| .remove = gc2235_remove, |
| }; |
| module_i2c_driver(gc2235_driver); |
| |
| MODULE_AUTHOR("Shuguang Gong <Shuguang.Gong@intel.com>"); |
| MODULE_DESCRIPTION("A low-level driver for GC2235 sensors"); |
| MODULE_LICENSE("GPL"); |