LXR linux/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
  57static 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
  70static struct gpio_led_platform_data d2net_led_data = {
  71        .num_leds = ARRAY_SIZE(d2net_leds),
  72        .leds = d2net_leds,
  73};
  74
  75static struct platform_device d2net_gpio_leds = {
  76        .name           = "leds-gpio",
  77        .id             = -1,
  78        .dev            = {
  79                .platform_data  = &d2net_led_data,
  80        },
  81};
  82
  83static 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
 104void __init d2net_init(void)
 105{
 106        d2net_gpio_leds_init();
 107
 108        pr_notice("d2net: Flash write are not yet supported.\n");
 109}
 110