2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
16 * Copyright (C) 2006 infineon
17 * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/version.h>
24 #include <linux/types.h>
26 #include <linux/init.h>
27 #include <linux/platform_device.h>
28 #include <linux/uaccess.h>
29 #include <linux/unistd.h>
30 #include <linux/errno.h>
31 #include <linux/leds.h>
32 #include <linux/delay.h>
35 #include <ifxmips_gpio.h>
36 #include <ifxmips_pmu.h>
38 #define DRVNAME "ifxmips_led"
40 /* might need to be changed depending on shift register used on the pcb */
42 #define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_FALLING
44 #define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_RISING
47 #define IFXMIPS_LED_SPEED IFXMIPS_LED_8HZ
49 #define IFXMIPS_LED_GPIO_PORT 0
51 #define IFXMIPS_MAX_LED 24
54 struct led_classdev cdev;
58 void ifxmips_led_set(unsigned int led)
61 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0) | led, IFXMIPS_LED_CPU0);
63 EXPORT_SYMBOL(ifxmips_led_set);
65 void ifxmips_led_clear(unsigned int led)
67 led = ~(led & 0xffffff);
68 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0) & led, IFXMIPS_LED_CPU0);
70 EXPORT_SYMBOL(ifxmips_led_clear);
72 void ifxmips_led_blink_set(unsigned int led)
75 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | led, IFXMIPS_LED_CON0);
77 EXPORT_SYMBOL(ifxmips_led_blink_set);
79 void ifxmips_led_blink_clear(unsigned int led)
81 led = ~(led & 0xffffff);
82 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) & led, IFXMIPS_LED_CON0);
84 EXPORT_SYMBOL(ifxmips_led_blink_clear);
86 static void ifxmips_ledapi_set(struct led_classdev *led_cdev,
87 enum led_brightness value)
89 struct ifxmips_led *led_dev =
90 container_of(led_cdev, struct ifxmips_led, cdev);
93 ifxmips_led_set(1 << led_dev->bit);
95 ifxmips_led_clear(1 << led_dev->bit);
98 void ifxmips_led_setup_gpio(void)
102 /* leds are controlled via a shift register
103 we need to setup pins SH,D,ST (4,5,6) to make it work */
104 for (i = 4; i < 7; i++) {
105 ifxmips_port_set_altsel0(IFXMIPS_LED_GPIO_PORT, i);
106 ifxmips_port_clear_altsel1(IFXMIPS_LED_GPIO_PORT, i);
107 ifxmips_port_set_dir_out(IFXMIPS_LED_GPIO_PORT, i);
108 ifxmips_port_set_open_drain(IFXMIPS_LED_GPIO_PORT, i);
112 static int ifxmips_led_probe(struct platform_device *dev)
116 ifxmips_led_setup_gpio();
118 ifxmips_w32(0, IFXMIPS_LED_AR);
119 ifxmips_w32(0, IFXMIPS_LED_CPU0);
120 ifxmips_w32(0, IFXMIPS_LED_CPU1);
121 ifxmips_w32(LED_CON0_SWU, IFXMIPS_LED_CON0);
122 ifxmips_w32(0, IFXMIPS_LED_CON1);
124 /* setup the clock edge that the shift register is triggered on */
125 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) & ~IFXMIPS_LED_EDGE_MASK,
127 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | IFXMIPS_LED_CLK_EDGE,
130 /* per default leds 15-0 are set */
131 ifxmips_w32(IFXMIPS_LED_GROUP1 | IFXMIPS_LED_GROUP0, IFXMIPS_LED_CON1);
133 /* leds are update periodically by the FPID */
134 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_UPD_MASK,
136 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) | IFXMIPS_LED_UPD_SRC_FPI,
139 /* set led update speed */
140 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_MASK,
142 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) | IFXMIPS_LED_SPEED,
145 /* adsl 0 and 1 leds are updated by the arc */
146 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | IFXMIPS_LED_ADSL_SRC,
149 /* per default, the leds are turned on */
150 ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_LED);
152 for (i = 0; i < IFXMIPS_MAX_LED; i++) {
153 struct ifxmips_led *tmp =
154 kzalloc(sizeof(struct ifxmips_led), GFP_KERNEL);
155 tmp->cdev.brightness_set = ifxmips_ledapi_set;
156 tmp->cdev.name = kmalloc(sizeof("ifxmips:led:00"), GFP_KERNEL);
157 sprintf((char *)tmp->cdev.name, "ifxmips:led:%02d", i);
158 tmp->cdev.default_trigger = NULL;
160 led_classdev_register(&dev->dev, &tmp->cdev);
166 static int ifxmips_led_remove(struct platform_device *pdev)
171 static struct platform_driver ifxmips_led_driver = {
172 .probe = ifxmips_led_probe,
173 .remove = ifxmips_led_remove,
176 .owner = THIS_MODULE,
180 int __init ifxmips_led_init(void)
182 int ret = platform_driver_register(&ifxmips_led_driver);
185 "ifxmips_led: Error registering platfom driver!");
190 void __exit ifxmips_led_exit(void)
192 platform_driver_unregister(&ifxmips_led_driver);
195 module_init(ifxmips_led_init);
196 module_exit(ifxmips_led_exit);