target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c

   1 /*
   2  *  MikroTik RouterBOARD 750 support
   3  *
   4  *  Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  */
  10
  11 #include <linux/platform_device.h>
  12 #include <asm/mach-ar71xx/ar71xx.h>
  13 #include <asm/mach-ar71xx/mach-rb750.h>
  14
  15 #include "machtype.h"
  16 #include "dev-ap91-eth.h"
  17
  18 static struct rb750_led_data rb750_leds[] = {
  19         {
  20                 .name           = "rb750:green:act",
  21                 .mask           = RB750_LED_ACT,
  22                 .active_low     = 1,
  23         }, {
  24                 .name           = "rb750:green:port1",
  25                 .mask           = RB750_LED_PORT5,
  26                 .active_low     = 1,
  27         }, {
  28                 .name           = "rb750:green:port2",
  29                 .mask           = RB750_LED_PORT4,
  30                 .active_low     = 1,
  31         }, {
  32                 .name           = "rb750:green:port3",
  33                 .mask           = RB750_LED_PORT3,
  34                 .active_low     = 1,
  35         }, {
  36                 .name           = "rb750:green:port4",
  37                 .mask           = RB750_LED_PORT2,
  38                 .active_low     = 1,
  39         }, {
  40                 .name           = "rb750:green:port5",
  41                 .mask           = RB750_LED_PORT1,
  42                 .active_low     = 1,
  43         }
  44 };
  45
  46 static struct rb750_led_platform_data rb750_leds_data = {
  47         .num_leds       = ARRAY_SIZE(rb750_leds),
  48         .leds           = rb750_leds,
  49 };
  50
  51 static struct platform_device rb750_leds_device = {
  52         .name   = "leds-rb750",
  53         .id     = -1,
  54         .dev    = {
  55                 .platform_data = &rb750_leds_data,
  56         }
  57 };
  58
  59 int rb750_latch_change(u32 mask_clr, u32 mask_set)
  60 {
  61         static DEFINE_SPINLOCK(lock);
  62         static u32 latch_set = RB750_LED_BITS | RB750_LVC573_LE;
  63         static u32 latch_oe;
  64         static u32 latch_clr;
  65         unsigned long flags;
  66         u32 t;
  67         int ret = 0;
  68
  69         spin_lock_irqsave(&lock, flags);
  70
  71         if ((mask_clr & BIT(31)) != 0 &&
  72             (latch_set & RB750_LVC573_LE) == 0) {
  73                 goto unlock;
  74         }
  75
  76         latch_set = (latch_set | mask_set) & ~mask_clr;
  77         latch_clr = (latch_clr | mask_clr) & ~mask_set;
  78
  79         if (latch_oe == 0)
  80                 latch_oe = __raw_readl(ar71xx_gpio_base + GPIO_REG_OE);
  81
  82         if (likely(latch_set & RB750_LVC573_LE)) {
  83                 void __iomem *base = ar71xx_gpio_base;
  84
  85                 t = __raw_readl(base + GPIO_REG_OE);
  86                 t |= mask_clr | latch_oe | mask_set;
  87
  88                 __raw_writel(t, base + GPIO_REG_OE);
  89                 __raw_writel(latch_clr, base + GPIO_REG_CLEAR);
  90                 __raw_writel(latch_set, base + GPIO_REG_SET);
  91         } else if (mask_clr & RB750_LVC573_LE) {
  92                 void __iomem *base = ar71xx_gpio_base;
  93
  94                 latch_oe = __raw_readl(base + GPIO_REG_OE);
  95                 __raw_writel(RB750_LVC573_LE, base + GPIO_REG_CLEAR);
  96                 /* flush write */
  97                 __raw_readl(base + GPIO_REG_CLEAR);
  98         }
  99
 100         ret = 1;
 101
 102  unlock:
 103         spin_unlock_irqrestore(&lock, flags);
 104         return ret;
 105 }
 106 EXPORT_SYMBOL_GPL(rb750_latch_change);
 107
 108 static void __init rb750_setup(void)
 109 {
 110         ar71xx_gpio_function_disable(AR724X_GPIO_FUNC_ETH_SWITCH_LED0_EN |
 111                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED1_EN |
 112                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED2_EN |
 113                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED3_EN |
 114                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED4_EN);
 115
 116         ap91_eth_init(NULL);
 117         platform_device_register(&rb750_leds_device);
 118 }
 119
 120 MIPS_MACHINE(AR71XX_MACH_RB_750, "750i", "MikroTik RouterBOARD 750",
 121              rb750_setup);