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