15c173b082985a2ef4f88ac90d990d0f87ec4607
[openwrt/svn-archive/archive.git] / target / linux / ifxmips / files / drivers / char / ifxmips_led.c
1 /*
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.
6 *
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.
11 *
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.
15 *
16 * Copyright (C) 2006 infineon
17 * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
18 *
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/version.h>
24 #include <linux/types.h>
25 #include <linux/fs.h>
26 #include <linux/init.h>
27 #include <linux/platform_device.h>
28 #include <asm/uaccess.h>
29 #include <asm/unistd.h>
30 #include <linux/errno.h>
31 #include <asm/ifxmips/ifxmips.h>
32 #include <asm/ifxmips/ifxmips_gpio.h>
33 #include <asm/ifxmips/ifxmips_pmu.h>
34
35 #define DRVNAME "ifxmips_led"
36
37 #define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_FALLING
38 //#define IFXMIPS_LED_CLK_EDGE IFXMIPS_LED_RISING
39
40 #define IFXMIPS_LED_SPEED IFXMIPS_LED_8HZ
41
42 #define IFXMIPS_LED_GPIO_PORT 0
43
44 static int ifxmips_led_major;
45
46 void
47 ifxmips_led_set (unsigned int led)
48 {
49 led &= 0xffffff;
50 writel(readl(IFXMIPS_LED_CPU0) | led, IFXMIPS_LED_CPU0);
51 }
52 EXPORT_SYMBOL(ifxmips_led_set);
53
54 void
55 ifxmips_led_clear (unsigned int led)
56 {
57 led = ~(led & 0xffffff);
58 writel(readl(IFXMIPS_LED_CPU0) & led, IFXMIPS_LED_CPU0);
59 }
60 EXPORT_SYMBOL(ifxmips_led_clear);
61
62 void
63 ifxmips_led_blink_set (unsigned int led)
64 {
65 led &= 0xffffff;
66 writel(readl(IFXMIPS_LED_CON0) | led, IFXMIPS_LED_CON0);
67 }
68 EXPORT_SYMBOL(ifxmips_led_blink_set);
69
70 void
71 ifxmips_led_blink_clear (unsigned int led)
72 {
73 led = ~(led & 0xffffff);
74 writel(readl(IFXMIPS_LED_CON0) & led, IFXMIPS_LED_CON0);
75 }
76 EXPORT_SYMBOL(ifxmips_led_blink_clear);
77
78 void
79 ifxmips_led_setup_gpio (void)
80 {
81 int i = 0;
82
83 /* we need to setup pins SH,D,ST (4,5,6) */
84 for (i = 4; i < 7; i++)
85 {
86 ifxmips_port_set_altsel0(IFXMIPS_LED_GPIO_PORT, i);
87 ifxmips_port_clear_altsel1(IFXMIPS_LED_GPIO_PORT, i);
88 ifxmips_port_set_dir_out(IFXMIPS_LED_GPIO_PORT, i);
89 ifxmips_port_set_open_drain(IFXMIPS_LED_GPIO_PORT, i);
90 }
91 }
92
93 static int
94 led_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
95 {
96 int ret = -EINVAL;
97
98 switch ( cmd )
99 {
100 }
101
102 return ret;
103 }
104
105 static int
106 led_open (struct inode *inode, struct file *file)
107 {
108 return 0;
109 }
110
111 static int
112 led_release (struct inode *inode, struct file *file)
113 {
114 return 0;
115 }
116
117 static struct file_operations ifxmips_led_fops = {
118 .owner = THIS_MODULE,
119 .ioctl = led_ioctl,
120 .open = led_open,
121 .release = led_release
122 };
123
124 static int
125 ifxmips_led_probe(struct platform_device *dev)
126 {
127 int ret = 0;
128
129 ifxmips_led_setup_gpio();
130
131 writel(0, IFXMIPS_LED_AR);
132 writel(0, IFXMIPS_LED_CPU0);
133 writel(0, IFXMIPS_LED_CPU1);
134 writel(LED_CON0_SWU, IFXMIPS_LED_CON0);
135 writel(0, IFXMIPS_LED_CON1);
136
137 /* setup the clock edge that the shift register is triggered on */
138 writel(readl(IFXMIPS_LED_CON0) & ~IFXMIPS_LED_EDGE_MASK, IFXMIPS_LED_CON0);
139 writel(readl(IFXMIPS_LED_CON0) | IFXMIPS_LED_CLK_EDGE, IFXMIPS_LED_CON0);
140
141 /* per default leds 15-0 are set */
142 writel(IFXMIPS_LED_GROUP1 | IFXMIPS_LED_GROUP0, IFXMIPS_LED_CON1);
143
144 /* leds are update periodically by the FPID */
145 writel(readl(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_UPD_MASK, IFXMIPS_LED_CON1);
146 writel(readl(IFXMIPS_LED_CON1) | IFXMIPS_LED_UPD_SRC_FPI, IFXMIPS_LED_CON1);
147
148 /* set led update speed */
149 writel(readl(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_MASK, IFXMIPS_LED_CON1);
150 writel(readl(IFXMIPS_LED_CON1) | IFXMIPS_LED_SPEED, IFXMIPS_LED_CON1);
151
152 /* adsl 0 and 1 leds are updated by the arc */
153 writel(readl(IFXMIPS_LED_CON0) | IFXMIPS_LED_ADSL_SRC, IFXMIPS_LED_CON0);
154
155 /* per default, the leds are turned on */
156 ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_LED);
157
158 ifxmips_led_major = register_chrdev(0, "ifxmips_led", &ifxmips_led_fops);
159
160 if (!ifxmips_led_major)
161 {
162 printk("ifxmips_led: Error! Could not register device. %d\n", ifxmips_led_major);
163 ret = -EINVAL;
164
165 goto out;
166 }
167
168 printk(KERN_INFO "ifxmips_led: device successfully initialized #%d.\n", ifxmips_led_major);
169
170 out:
171 return ret;
172 }
173
174 static int
175 ifxmips_led_remove(struct platform_device *pdev)
176 {
177 unregister_chrdev(ifxmips_led_major, "ifxmips_led");
178 return 0;
179 }
180
181 static struct
182 platform_driver ifxmips_led_driver = {
183 .probe = ifxmips_led_probe,
184 .remove = ifxmips_led_remove,
185 .driver = {
186 .name = DRVNAME,
187 .owner = THIS_MODULE,
188 },
189 };
190
191 /*
192 Map for LED on reference board
193 WLAN_READ LED11 OUT1 15
194 WARNING LED12 OUT2 14
195 FXS1_LINK LED13 OUT3 13
196 FXS2_LINK LED14 OUT4 12
197 FXO_ACT LED15 OUT5 11
198 USB_LINK LED16 OUT6 10
199 ADSL2_LINK LED19 OUT7 9
200 BT_LINK LED17 OUT8 8
201 SD_LINK LED20 OUT9 7
202 ADSL2_TRAFFIC LED31 OUT16 0
203 Map for hardware relay on reference board
204 USB Power On OUT11 5
205 RELAY OUT12 4
206 */
207
208 int __init
209 ifxmips_led_init (void)
210 {
211 int ret = platform_driver_register(&ifxmips_led_driver);
212 if (ret)
213 printk(KERN_INFO "ifxmips_led: Error registering platfom driver!");
214
215 return ret;
216 }
217
218 void __exit
219 ifxmips_led_exit (void)
220 {
221 platform_driver_unregister(&ifxmips_led_driver);
222 }
223
224 module_init(ifxmips_led_init);
225 module_exit(ifxmips_led_exit);