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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2006 infineon
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/unistd.h>
#include <linux/errno.h>
#include <linux/leds.h>
#include <linux/delay.h>
#include <asm/ifxmips/ifxmips.h>
#include <asm/ifxmips/ifxmips_gpio.h>
#include <asm/ifxmips/ifxmips_pmu.h>
#define DRVNAME "ifxmips_led"
#if 1
#define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_FALLING
#else
#define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_RISING
#endif
#define IFXMIPS_LED_SPEED IFXMIPS_LED_8HZ
#define IFXMIPS_LED_GPIO_PORT 0
#define IFXMIPS_MAX_LED 24
struct ifxmips_led {
struct led_classdev cdev;
u8 bit;
};
void ifxmips_led_set(unsigned int led)
{
led &= 0xffffff;
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0) | led, IFXMIPS_LED_CPU0);
}
EXPORT_SYMBOL(ifxmips_led_set);
void ifxmips_led_clear(unsigned int led)
{
led = ~(led & 0xffffff);
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0) & led, IFXMIPS_LED_CPU0);
}
EXPORT_SYMBOL(ifxmips_led_clear);
void ifxmips_led_blink_set(unsigned int led)
{
led &= 0xffffff;
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | led, IFXMIPS_LED_CON0);
}
EXPORT_SYMBOL(ifxmips_led_blink_set);
void ifxmips_led_blink_clear(unsigned int led)
{
led = ~(led & 0xffffff);
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) & led, IFXMIPS_LED_CON0);
}
EXPORT_SYMBOL(ifxmips_led_blink_clear);
static void ifxmips_ledapi_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct ifxmips_led *led_dev =
container_of(led_cdev, struct ifxmips_led, cdev);
if (value)
ifxmips_led_set(1 << led_dev->bit);
else
ifxmips_led_clear(1 << led_dev->bit);
}
void ifxmips_led_setup_gpio(void)
{
int i = 0;
/* we need to setup pins SH,D,ST (4,5,6) */
for (i = 4; i < 7; i++) {
ifxmips_port_set_altsel0(IFXMIPS_LED_GPIO_PORT, i);
ifxmips_port_clear_altsel1(IFXMIPS_LED_GPIO_PORT, i);
ifxmips_port_set_dir_out(IFXMIPS_LED_GPIO_PORT, i);
ifxmips_port_set_open_drain(IFXMIPS_LED_GPIO_PORT, i);
}
}
static int ifxmips_led_probe(struct platform_device *dev)
{
int i = 0;
ifxmips_led_setup_gpio();
ifxmips_w32(0, IFXMIPS_LED_AR);
ifxmips_w32(0, IFXMIPS_LED_CPU0);
ifxmips_w32(0, IFXMIPS_LED_CPU1);
ifxmips_w32(LED_CON0_SWU, IFXMIPS_LED_CON0);
ifxmips_w32(0, IFXMIPS_LED_CON1);
/* setup the clock edge that the shift register is triggered on */
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) & ~IFXMIPS_LED_EDGE_MASK,
IFXMIPS_LED_CON0);
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | IFXMIPS_LED_CLK_EDGE,
IFXMIPS_LED_CON0);
/* per default leds 15-0 are set */
ifxmips_w32(IFXMIPS_LED_GROUP1 | IFXMIPS_LED_GROUP0, IFXMIPS_LED_CON1);
/* leds are update periodically by the FPID */
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_UPD_MASK,
IFXMIPS_LED_CON1);
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) | IFXMIPS_LED_UPD_SRC_FPI,
IFXMIPS_LED_CON1);
/* set led update speed */
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_MASK,
IFXMIPS_LED_CON1);
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) | IFXMIPS_LED_SPEED,
IFXMIPS_LED_CON1);
/* adsl 0 and 1 leds are updated by the arc */
ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | IFXMIPS_LED_ADSL_SRC,
IFXMIPS_LED_CON0);
/* per default, the leds are turned on */
ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_LED);
for (i = 0; i < IFXMIPS_MAX_LED; i++) {
struct ifxmips_led *tmp =
kzalloc(sizeof(struct ifxmips_led), GFP_KERNEL);
tmp->cdev.brightness_set = ifxmips_ledapi_set;
tmp->cdev.name = kmalloc(sizeof("ifxmips:led:00"), GFP_KERNEL);
sprintf((char *)tmp->cdev.name, "ifxmips:led:%02d", i);
tmp->cdev.default_trigger = NULL;
tmp->bit = i;
led_classdev_register(&dev->dev, &tmp->cdev);
}
return 0;
}
static int ifxmips_led_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver ifxmips_led_driver = {
.probe = ifxmips_led_probe,
.remove = ifxmips_led_remove,
.driver = {
.name = DRVNAME,
.owner = THIS_MODULE,
},
};
int __init ifxmips_led_init(void)
{
int ret = platform_driver_register(&ifxmips_led_driver);
if (ret)
printk(KERN_INFO
"ifxmips_led: Error registering platfom driver!");
return ret;
}
void __exit ifxmips_led_exit(void)
{
platform_driver_unregister(&ifxmips_led_driver);
}
module_init(ifxmips_led_init);
module_exit(ifxmips_led_exit);
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