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|
// 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 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;
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,
},
};
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;
if (!dev || !dev->platform_data)
return -ENODEV;
ret = dev->platform_data->gpio1_ctrl(sd, !flag);
usleep_range(60, 90);
ret |= dev->platform_data->gpio0_ctrl(sd, flag);
return ret;
}
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;
}
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, dev->res->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_state *sd_state,
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;
struct gc2235_resolution *res;
int ret = 0;
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);
res = v4l2_find_nearest_size(gc2235_res_preview,
ARRAY_SIZE(gc2235_res_preview), width,
height, fmt->width, fmt->height);
if (!res)
res = &gc2235_res_preview[N_RES - 1];
fmt->width = res->width;
fmt->height = res->height;
dev->res = res;
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
*v4l2_subdev_state_get_format(sd_state, 0) = *fmt;
mutex_unlock(&dev->input_lock);
return 0;
}
ret = startup(sd);
if (ret) {
dev_err(&client->dev, "gc2235 startup err\n");
goto err;
}
err:
mutex_unlock(&dev->input_lock);
return ret;
}
static int gc2235_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
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 = dev->res->width;
fmt->height = dev->res->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 = 0, low = 0;
u16 id;
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
return -ENODEV;
gc2235_read_reg(client, GC2235_8BIT, GC2235_SENSOR_ID_H, &high);
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 = dev->res->fps;
return 0;
}
static int gc2235_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
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_state *sd_state,
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 = dev->res->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 void 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);
}
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->res = &gc2235_res_preview[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 = 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");
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