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>
34 #include <asm/ifxmips/ifxmips.h>
35 #include <asm/ifxmips/ifxmips_gpio.h>
36 #include <asm/ifxmips/ifxmips_pmu.h>
38 #define DRVNAME "ifxmips_led"
40 #define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_FALLING
41 //#define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_RISING
43 #define IFXMIPS_LED_SPEED IFXMIPS_LED_8HZ
45 #define IFXMIPS_LED_GPIO_PORT 0
47 #define IFXMIPS_MAX_LED 24
50 struct led_classdev cdev
;
54 void ifxmips_led_set (unsigned int led
)
57 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0
) | led
, IFXMIPS_LED_CPU0
);
59 EXPORT_SYMBOL(ifxmips_led_set
);
61 void ifxmips_led_clear (unsigned int led
)
63 led
= ~(led
& 0xffffff);
64 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0
) & led
, IFXMIPS_LED_CPU0
);
66 EXPORT_SYMBOL(ifxmips_led_clear
);
68 void ifxmips_led_blink_set (unsigned int led
)
71 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0
) | led
, IFXMIPS_LED_CON0
);
73 EXPORT_SYMBOL(ifxmips_led_blink_set
);
75 void ifxmips_led_blink_clear (unsigned int led
)
77 led
= ~(led
& 0xffffff);
78 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0
) & led
, IFXMIPS_LED_CON0
);
80 EXPORT_SYMBOL(ifxmips_led_blink_clear
);
82 void ifxmips_ledapi_set(struct led_classdev
*led_cdev
, enum led_brightness value
)
84 struct ifxmips_led
*led_dev
= container_of(led_cdev
, struct ifxmips_led
, cdev
);
87 ifxmips_led_set(1 << led_dev
->bit
);
89 ifxmips_led_clear(1 << led_dev
->bit
);
92 void ifxmips_led_setup_gpio (void)
96 /* we need to setup pins SH,D,ST (4,5,6) */
97 for (i
= 4; i
< 7; i
++) {
98 ifxmips_port_set_altsel0(IFXMIPS_LED_GPIO_PORT
, i
);
99 ifxmips_port_clear_altsel1(IFXMIPS_LED_GPIO_PORT
, i
);
100 ifxmips_port_set_dir_out(IFXMIPS_LED_GPIO_PORT
, i
);
101 ifxmips_port_set_open_drain(IFXMIPS_LED_GPIO_PORT
, i
);
105 static int ifxmips_led_probe(struct platform_device
*dev
)
109 ifxmips_led_setup_gpio();
111 ifxmips_w32(0, IFXMIPS_LED_AR
);
112 ifxmips_w32(0, IFXMIPS_LED_CPU0
);
113 ifxmips_w32(0, IFXMIPS_LED_CPU1
);
114 ifxmips_w32(LED_CON0_SWU
, IFXMIPS_LED_CON0
);
115 ifxmips_w32(0, IFXMIPS_LED_CON1
);
117 /* setup the clock edge that the shift register is triggered on */
118 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0
) & ~IFXMIPS_LED_EDGE_MASK
, IFXMIPS_LED_CON0
);
119 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0
) | IFXMIPS_LED_CLK_EDGE
, IFXMIPS_LED_CON0
);
121 /* per default leds 15-0 are set */
122 ifxmips_w32(IFXMIPS_LED_GROUP1
| IFXMIPS_LED_GROUP0
, IFXMIPS_LED_CON1
);
124 /* leds are update periodically by the FPID */
125 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1
) & ~IFXMIPS_LED_UPD_MASK
, IFXMIPS_LED_CON1
);
126 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1
) | IFXMIPS_LED_UPD_SRC_FPI
, IFXMIPS_LED_CON1
);
128 /* set led update speed */
129 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1
) & ~IFXMIPS_LED_MASK
, IFXMIPS_LED_CON1
);
130 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1
) | IFXMIPS_LED_SPEED
, IFXMIPS_LED_CON1
);
132 /* adsl 0 and 1 leds are updated by the arc */
133 ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0
) | IFXMIPS_LED_ADSL_SRC
, IFXMIPS_LED_CON0
);
135 /* per default, the leds are turned on */
136 ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_LED
);
138 for (i
= 0; i
< IFXMIPS_MAX_LED
; i
++) {
139 struct ifxmips_led
*tmp
= kzalloc(sizeof(struct ifxmips_led
), GFP_KERNEL
);
140 tmp
->cdev
.brightness_set
= ifxmips_ledapi_set
;
141 tmp
->cdev
.name
= kmalloc(sizeof("ifxmips:led:00"), GFP_KERNEL
);
142 sprintf((char *)tmp
->cdev
.name
, "ifxmips:led:%02d", i
);
143 tmp
->cdev
.default_trigger
= NULL
;
145 led_classdev_register(&dev
->dev
, &tmp
->cdev
);
151 static int ifxmips_led_remove(struct platform_device
*pdev
)
156 static struct platform_driver ifxmips_led_driver
= {
157 .probe
= ifxmips_led_probe
,
158 .remove
= ifxmips_led_remove
,
161 .owner
= THIS_MODULE
,
165 int __init
ifxmips_led_init (void)
167 int ret
= platform_driver_register(&ifxmips_led_driver
);
169 printk(KERN_INFO
"ifxmips_led: Error registering platfom driver!");
174 void __exit
ifxmips_led_exit (void)
176 platform_driver_unregister(&ifxmips_led_driver
);
179 module_init(ifxmips_led_init
);
180 module_exit(ifxmips_led_exit
);