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/*
* imx135.c - camera sensor IMX135 kernel PCL driver.
* As an example, some devices can be implmented specifically instead of using
* the virtual PCL driver to handle some special features (hardware resources,
* sequences, etc.).
*
* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define CAMERA_DEVICE_INTERNAL
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <media/nvc.h>
#include <media/camera.h>
struct imx135_info {
struct nvc_pinmux mclk_enable;
struct nvc_pinmux mclk_disable;
struct nvc_gpio xclr;
struct nvc_regulator vana;
struct nvc_regulator vdig;
struct nvc_regulator vif;
};
static int imx135_update(
struct camera_device *cdev, struct cam_update *upd, int num)
{
/* struct imx135_info *info = dev_get_drvdata(cdev->dev); */
int err = 0;
int idx;
dev_dbg(cdev->dev, "%s %d\n", __func__, num);
mutex_lock(&cdev->mutex);
for (idx = 0; idx < num; idx++) {
switch (upd[idx].type) {
case UPDATE_PINMUX:
break;
case UPDATE_GPIO:
break;
default:
dev_err(cdev->dev,
"unsupported upd type %d\n", upd[idx].type);
break;
}
}
mutex_unlock(&cdev->mutex);
return err;
}
static int imx135_power_on(struct camera_device *cdev)
{
struct imx135_info *info = dev_get_drvdata(cdev->dev);
int err = 0;
if (cdev->is_power_on)
return 0;
dev_dbg(cdev->dev, "%s %x\n", __func__, cdev->is_power_on);
mutex_lock(&cdev->mutex);
if (info->xclr.valid)
gpio_set_value(info->xclr.gpio,
info->xclr.active_high ? 1 : 0);
if (info->vana.vreg) {
err = regulator_enable(info->vana.vreg);
if (err) {
dev_err(cdev->dev, "%s vana err\n", __func__);
goto power_on_end;
}
}
if (info->vdig.vreg) {
err = regulator_enable(info->vdig.vreg);
if (err) {
dev_err(cdev->dev, "%s vdig err\n", __func__);
if (info->vana.vreg)
regulator_disable(info->vana.vreg);
goto power_on_end;
}
}
if (info->vif.vreg) {
err = regulator_enable(info->vif.vreg);
if (err) {
dev_err(cdev->dev, "%s vif err\n", __func__);
if (info->vdig.vreg)
regulator_disable(info->vdig.vreg);
if (info->vana.vreg)
regulator_disable(info->vana.vreg);
goto power_on_end;
}
}
if (info->mclk_enable.valid)
tegra_pinmux_config_table(&info->mclk_enable.pcfg, 1);
usleep_range(2000, 2020);
if (info->xclr.valid)
gpio_set_value(info->xclr.gpio,
info->xclr.active_high ? 0 : 1);
cdev->is_power_on = 1;
power_on_end:
mutex_unlock(&cdev->mutex);
if (!err)
usleep_range(250, 270);
return err;
}
static int imx135_power_off(struct camera_device *cdev)
{
struct imx135_info *info = dev_get_drvdata(cdev->dev);
int err = 0;
if (!cdev->is_power_on)
return 0;
dev_dbg(cdev->dev, "%s %x\n", __func__, cdev->is_power_on);
mutex_lock(&cdev->mutex);
if (info->mclk_disable.valid)
tegra_pinmux_config_table(&info->mclk_disable.pcfg, 1);
if (info->xclr.valid)
gpio_set_value(info->xclr.gpio,
info->xclr.active_high ? 1 : 0);
if (info->vana.vreg) {
err = regulator_disable(info->vana.vreg);
if (err) {
dev_err(cdev->dev, "%s vana err\n", __func__);
goto power_off_end;
}
}
if (info->vdig.vreg) {
err = regulator_disable(info->vdig.vreg);
if (err) {
dev_err(cdev->dev, "%s vdig err\n", __func__);
goto power_off_end;
}
}
if (info->vif.vreg) {
err = regulator_disable(info->vif.vreg);
if (err) {
dev_err(cdev->dev, "%s vif err\n", __func__);
goto power_off_end;
}
}
cdev->is_power_on = 0;
power_off_end:
mutex_unlock(&cdev->mutex);
return err;
}
static int imx135_instance_destroy(struct camera_device *cdev)
{
struct imx135_info *info = dev_get_drvdata(cdev->dev);
dev_dbg(cdev->dev, "%s\n", __func__);
if (!info)
return 0;
dev_set_drvdata(cdev->dev, NULL);
if (likely(info->vana.vreg))
regulator_put(info->vana.vreg);
if (likely(info->vdig.vreg))
regulator_put(info->vdig.vreg);
if (likely(info->vif.vreg))
regulator_put(info->vif.vreg);
kfree(info);
return 0;
}
static int imx135_instance_create(struct camera_device *cdev, void *pdata)
{
struct imx135_info *info;
dev_dbg(cdev->dev, "%s\n", __func__);
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (info == NULL) {
dev_err(cdev->dev, "%s memory low!\n", __func__);
return -ENOMEM;
}
camera_regulator_get(cdev->dev, &info->vana, "vana"); /* 2.7v */
camera_regulator_get(cdev->dev, &info->vdig, "vdig"); /* 1.2v */
camera_regulator_get(cdev->dev, &info->vif, "vif"); /* 1.8v */
dev_set_drvdata(cdev->dev, info);
return 0;
}
static struct camera_chip imx135_chip = {
.name = "pcl_imx135_demo",
.type = CAMERA_DEVICE_TYPE_I2C,
.regmap_cfg = {
.reg_bits = 16,
.val_bits = 8,
.cache_type = REGCACHE_NONE,
},
.init = imx135_instance_create,
.release = imx135_instance_destroy,
.power_on = imx135_power_on,
.power_off = imx135_power_off,
.update = imx135_update,
};
static int __init imx135_init(void)
{
pr_info("%s\n", __func__);
INIT_LIST_HEAD(&imx135_chip.list);
camera_chip_add(&imx135_chip);
return 0;
}
device_initcall(imx135_init);
static void __exit imx135_exit(void)
{
}
module_exit(imx135_exit);
MODULE_DESCRIPTION("IMX135 sensor device");
MODULE_AUTHOR("Charlie Huang <chahuang@nvidia.com>");
MODULE_LICENSE("GPL v2");
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