arch/arm/mach-orion5x/board-d2net.c

   1 /*
   2  * arch/arm/mach-orion5x/board-d2net.c
   3  *
   4  * LaCie d2Network and Big Disk Network NAS setup
   5  *
   6  * Copyright (C) 2009 Simon Guinot <sguinot@lacie.com>
   7  *
   8  * This file is licensed under the terms of the GNU General Public
   9  * License version 2. This program is licensed "as is" without any
  10  * warranty of any kind, whether express or implied.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/pci.h>
  17 #include <linux/irq.h>
  18 #include <linux/leds.h>
  19 #include <linux/gpio.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/mach/arch.h>
  22 #include <asm/mach/pci.h>
  23 #include <plat/orion-gpio.h>
  24 #include "common.h"
  25 #include "orion5x.h"
  26
  27 /*****************************************************************************
  28  * LaCie d2 Network Info
  29  ****************************************************************************/
  30
  31 /*****************************************************************************
  32  * GPIO LED's
  33  ****************************************************************************/
  34
  35 /*
  36  * The blue front LED is wired to the CPLD and can blink in relation with the
  37  * SATA activity.
  38  *
  39  * The following array detail the different LED registers and the combination
  40  * of their possible values:
  41  *
  42  * led_off   | blink_ctrl | SATA active | LED state
  43  *           |            |             |
  44  *    1      |     x      |      x      |  off
  45  *    0      |     0      |      0      |  off
  46  *    0      |     1      |      0      |  blink (rate 300ms)
  47  *    0      |     x      |      1      |  on
  48  *
  49  * Notes: The blue and the red front LED's can't be on at the same time.
  50  *        Red LED have priority.
  51  */
  52
  53 #define D2NET_GPIO_RED_LED              6
  54 #define D2NET_GPIO_BLUE_LED_BLINK_CTRL  16
  55 #define D2NET_GPIO_BLUE_LED_OFF         23
  56
  57 static struct gpio_led d2net_leds[] = {
  58         {
  59                 .name = "d2net:blue:sata",
  60                 .default_trigger = "default-on",
  61                 .gpio = D2NET_GPIO_BLUE_LED_OFF,
  62                 .active_low = 1,
  63         },
  64         {
  65                 .name = "d2net:red:fail",
  66                 .gpio = D2NET_GPIO_RED_LED,
  67         },
  68 };
  69
  70 static struct gpio_led_platform_data d2net_led_data = {
  71         .num_leds = ARRAY_SIZE(d2net_leds),
  72         .leds = d2net_leds,
  73 };
  74
  75 static struct platform_device d2net_gpio_leds = {
  76         .name           = "leds-gpio",
  77         .id             = -1,
  78         .dev            = {
  79                 .platform_data  = &d2net_led_data,
  80         },
  81 };
  82
  83 static void __init d2net_gpio_leds_init(void)
  84 {
  85         int err;
  86
  87         /* Configure register blink_ctrl to allow SATA activity LED blinking. */
  88         err = gpio_request(D2NET_GPIO_BLUE_LED_BLINK_CTRL, "blue LED blink");
  89         if (err == 0) {
  90                 err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, 1);
  91                 if (err)
  92                         gpio_free(D2NET_GPIO_BLUE_LED_BLINK_CTRL);
  93         }
  94         if (err)
  95                 pr_err("d2net: failed to configure blue LED blink GPIO\n");
  96
  97         platform_device_register(&d2net_gpio_leds);
  98 }
  99
 100 /*****************************************************************************
 101  * General Setup
 102  ****************************************************************************/
 103
 104 void __init d2net_init(void)
 105 {
 106         d2net_gpio_leds_init();
 107
 108         pr_notice("d2net: Flash write are not yet supported.\n");
 109 }