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/*
* Copyright (C) 2012 Spreadtrum Communications Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <mach/hardware.h>
#include <mach/adi.h>
#include <mach/adc.h>
#define sprd_rgbled_DBG
#ifdef sprd_rgbled_DBG
#define ENTER printk(KERN_INFO "[sprd_rgbled_DBG] func: %s line: %04d\n", __func__, __LINE__);
#define PRINT_DBG(x...) printk(KERN_INFO "[sprd_rgbled_DBG] " x)
#define PRINT_INFO(x...) printk(KERN_INFO "[sprd_rgbled_INFO] " x)
#define PRINT_WARN(x...) printk(KERN_INFO "[sprd_rgbled_WARN] " x)
#define PRINT_ERR(format,x...) printk(KERN_ERR "[sprd_rgbled_ERR] func: %s line: %04d info: " format, __func__, __LINE__, ## x)
#else
#define ENTER
#define PRINT_DBG(x...)
#define PRINT_INFO(x...) printk(KERN_INFO "[sprd_rgbled_INFO] " x)
#define PRINT_WARN(x...) printk(KERN_INFO "[sprd_rgbled_WARN] " x)
#define PRINT_ERR(format,x...) printk(KERN_ERR "[sprd_rgbled_ERR] func: %s line: %04d info: " format, __func__, __LINE__, ## x)
#endif
#ifdef CONFIG_ARCH_SCX35
#define ANA_BTLC_BASE (SPRD_MISC_BASE + 0x83c0)
#define ANA_BTLC_CTRL (ANA_BTLC_BASE + 0x00)
#endif
enum sprd_led_type
{
SPRD_LED_TYPE_R = 0,
SPRD_LED_TYPE_G,
SPRD_LED_TYPE_B,
SPRD_LED_TYPE_TOTAL
};
static char * sprd_rgbled_name[SPRD_LED_TYPE_TOTAL] =
{
"red",
"green",
"blue",
};
/* sprd rgb led */
struct sprd_rgbled {
struct platform_device *dev;
struct mutex mutex;
struct work_struct work;
spinlock_t value_lock;
enum led_brightness value;
struct led_classdev cdev;
int suspend;
};
static struct sprd_rgbled *g_sprd_rgbled[SPRD_LED_TYPE_TOTAL];
#define to_sprd_rgbled(led_cdev) \
container_of(led_cdev, struct sprd_rgbled, cdev)
static void sprd_rgbled_enable(struct sprd_rgbled *led)
{
#ifdef CONFIG_ARCH_SCX35
if(strcmp(led->cdev.name,sprd_rgbled_name[SPRD_LED_TYPE_R]) == 0)
{
sci_adi_set(ANA_BTLC_CTRL, 0x00F);
}
if(strcmp(led->cdev.name,sprd_rgbled_name[SPRD_LED_TYPE_G]) == 0)
{
sci_adi_set(ANA_BTLC_CTRL, 0x0F0);
}
if(strcmp(led->cdev.name,sprd_rgbled_name[SPRD_LED_TYPE_B]) == 0)
{
sci_adi_set(ANA_BTLC_CTRL, 0xF00);
}
#endif
PRINT_INFO("sprd_rgbled_enable\n");
}
static void sprd_rgbled_disable(struct sprd_rgbled *led)
{
#ifdef CONFIG_ARCH_SCX35
if(strcmp(led->cdev.name,sprd_rgbled_name[SPRD_LED_TYPE_R]) == 0)
{
sci_adi_clr(ANA_BTLC_CTRL, 0x00F);
}
if(strcmp(led->cdev.name,sprd_rgbled_name[SPRD_LED_TYPE_G]) == 0)
{
sci_adi_clr(ANA_BTLC_CTRL, 0x0F0);
}
if(strcmp(led->cdev.name,sprd_rgbled_name[SPRD_LED_TYPE_B]) == 0)
{
sci_adi_clr(ANA_BTLC_CTRL, 0xF00);
}
#endif
PRINT_INFO("sprd_rgbled_disable\n");
}
static void sprd_rgbled_work(struct work_struct *work)
{
struct sprd_rgbled *led = container_of(work, struct sprd_rgbled, work);
unsigned long flags;
mutex_lock(&led->mutex);
spin_lock_irqsave(&led->value_lock, flags);
if (led->value == LED_OFF) {
spin_unlock_irqrestore(&led->value_lock, flags);
sprd_rgbled_disable(led);
goto out;
}
spin_unlock_irqrestore(&led->value_lock, flags);
sprd_rgbled_enable(led);
out:
mutex_unlock(&led->mutex);
}
static void sprd_rgbled_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct sprd_rgbled *led = to_sprd_rgbled(led_cdev);
unsigned long flags;
spin_lock_irqsave(&led->value_lock, flags);
led->value = value;
spin_unlock_irqrestore(&led->value_lock, flags);
if(1 == led->suspend) {
PRINT_WARN("Do NOT change brightness in suspend mode\n");
return;
}
schedule_work(&led->work);
}
static void sprd_rgbled_shutdown(struct platform_device *dev)
{
int i;
for (i = 0; i < SPRD_LED_TYPE_TOTAL; i++)
{
if (!g_sprd_rgbled[i])
continue;
mutex_lock(&g_sprd_rgbled[i]->mutex);
sprd_rgbled_disable(g_sprd_rgbled[i]);
mutex_unlock(&g_sprd_rgbled[i]->mutex);
}
}
static int sprd_rgbled_probe(struct platform_device *dev)
{
int i;
int ret;
for (i = 0; i < SPRD_LED_TYPE_TOTAL; i++)
{
g_sprd_rgbled[i] = kzalloc(sizeof(struct sprd_rgbled), GFP_KERNEL);
if (g_sprd_rgbled[i] == NULL)
{
dev_err(&dev->dev, "No memory for device\n");
ret = -ENOMEM;
goto err;
}
g_sprd_rgbled[i]->cdev.brightness_set = sprd_rgbled_set;
g_sprd_rgbled[i]->cdev.name = sprd_rgbled_name[i];
g_sprd_rgbled[i]->cdev.brightness_get = NULL;
//g_sprd_rgbled[i]->cdev.flags |= LED_CORE_SUSPENDRESUME;
spin_lock_init(&g_sprd_rgbled[i]->value_lock);
mutex_init(&g_sprd_rgbled[i]->mutex);
INIT_WORK(&g_sprd_rgbled[i]->work, sprd_rgbled_work);
g_sprd_rgbled[i]->value = LED_OFF;
ret = led_classdev_register(&dev->dev, &g_sprd_rgbled[i]->cdev);
if (ret < 0)
{
goto err;
}
g_sprd_rgbled[i]->value = 15;//set default brightness
g_sprd_rgbled[i]->suspend = 0;
}
return 0;
err:
if (i)
{
for (i = i-1; i >=0; i--)
{
if (!g_sprd_rgbled[i])
continue;
led_classdev_unregister(&g_sprd_rgbled[i]->cdev);
kfree(g_sprd_rgbled[i]);
g_sprd_rgbled[i] = NULL;
}
}
return ret;
}
static int sprd_rgbled_remove(struct platform_device *dev)
{
int i;
for (i = 0; i < SPRD_LED_TYPE_TOTAL; i++)
{
if (!g_sprd_rgbled[i])
continue;
led_classdev_unregister(&g_sprd_rgbled[i]->cdev);
g_sprd_rgbled[i]->value = LED_OFF;
sprd_rgbled_disable(g_sprd_rgbled[i]);
cancel_work_sync(&g_sprd_rgbled[i]->work);
kfree(g_sprd_rgbled[i]);
g_sprd_rgbled[i] = NULL;
}
return 0;
}
static struct platform_driver sprd_rgbled_driver = {
.driver = {
.name = "rgb-led",
.owner = THIS_MODULE,
},
.probe = sprd_rgbled_probe,
.remove = sprd_rgbled_remove,
.shutdown = sprd_rgbled_shutdown,
};
module_platform_driver(sprd_rgbled_driver);
MODULE_AUTHOR("Lu Chai <lu.chai@spreadtrum.com>");
MODULE_DESCRIPTION("Sprd rgb led driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rgb-led");
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