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