target/linux/ar71xx/files/arch/mips/ath79/mach-rb750.c

   1 /*
   2  *  MikroTik RouterBOARD 750/750GL support
   3  *
   4  *  Copyright (C) 2010-2012 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/export.h>
  12 #include <linux/platform_device.h>
  13
  14 #include <asm/mach-ath79/ar71xx_regs.h>
  15 #include <asm/mach-ath79/ath79.h>
  16 #include <asm/mach-ath79/mach-rb750.h>
  17
  18 #include "common.h"
  19 #include "dev-eth.h"
  20 #include "machtypes.h"
  21
  22 static struct rb750_led_data rb750_leds[] = {
  23         {
  24                 .name           = "rb750:green:act",
  25                 .mask           = RB750_LED_ACT,
  26                 .active_low     = 1,
  27         }, {
  28                 .name           = "rb750:green:port1",
  29                 .mask           = RB750_LED_PORT5,
  30                 .active_low     = 1,
  31         }, {
  32                 .name           = "rb750:green:port2",
  33                 .mask           = RB750_LED_PORT4,
  34                 .active_low     = 1,
  35         }, {
  36                 .name           = "rb750:green:port3",
  37                 .mask           = RB750_LED_PORT3,
  38                 .active_low     = 1,
  39         }, {
  40                 .name           = "rb750:green:port4",
  41                 .mask           = RB750_LED_PORT2,
  42                 .active_low     = 1,
  43         }, {
  44                 .name           = "rb750:green:port5",
  45                 .mask           = RB750_LED_PORT1,
  46                 .active_low     = 1,
  47         }
  48 };
  49
  50 static struct rb750_led_platform_data rb750_leds_data;
  51 static struct platform_device rb750_leds_device = {
  52         .name   = "leds-rb750",
  53         .dev    = {
  54                 .platform_data = &rb750_leds_data,
  55         }
  56 };
  57
  58 static struct rb7xx_nand_platform_data rb750_nand_data;
  59 static struct platform_device rb750_nand_device = {
  60         .name   = "rb750-nand",
  61         .id     = -1,
  62         .dev    = {
  63                 .platform_data = &rb750_nand_data,
  64         }
  65 };
  66
  67 static void rb750_latch_change(u32 mask_clr, u32 mask_set)
  68 {
  69         static DEFINE_SPINLOCK(lock);
  70         static u32 latch_set = RB750_LED_BITS | RB750_LVC573_LE;
  71         static u32 latch_oe;
  72         static u32 latch_clr;
  73         unsigned long flags;
  74         u32 t;
  75
  76         spin_lock_irqsave(&lock, flags);
  77
  78         if ((mask_clr & BIT(31)) != 0 &&
  79             (latch_set & RB750_LVC573_LE) == 0) {
  80                 goto unlock;
  81         }
  82
  83         latch_set = (latch_set | mask_set) & ~mask_clr;
  84         latch_clr = (latch_clr | mask_clr) & ~mask_set;
  85
  86         if (latch_oe == 0)
  87                 latch_oe = __raw_readl(ath79_gpio_base + AR71XX_GPIO_REG_OE);
  88
  89         if (likely(latch_set & RB750_LVC573_LE)) {
  90                 void __iomem *base = ath79_gpio_base;
  91
  92                 t = __raw_readl(base + AR71XX_GPIO_REG_OE);
  93                 t |= mask_clr | latch_oe | mask_set;
  94
  95                 __raw_writel(t, base + AR71XX_GPIO_REG_OE);
  96                 __raw_writel(latch_clr, base + AR71XX_GPIO_REG_CLEAR);
  97                 __raw_writel(latch_set, base + AR71XX_GPIO_REG_SET);
  98         } else if (mask_clr & RB750_LVC573_LE) {
  99                 void __iomem *base = ath79_gpio_base;
 100
 101                 latch_oe = __raw_readl(base + AR71XX_GPIO_REG_OE);
 102                 __raw_writel(RB750_LVC573_LE, base + AR71XX_GPIO_REG_CLEAR);
 103                 /* flush write */
 104                 __raw_readl(base + AR71XX_GPIO_REG_CLEAR);
 105         }
 106
 107 unlock:
 108         spin_unlock_irqrestore(&lock, flags);
 109 }
 110
 111 static void rb750_nand_enable_pins(void)
 112 {
 113         rb750_latch_change(RB750_LVC573_LE, 0);
 114         ath79_gpio_function_setup(AR724X_GPIO_FUNC_JTAG_DISABLE,
 115                                   AR724X_GPIO_FUNC_SPI_EN);
 116 }
 117
 118 static void rb750_nand_disable_pins(void)
 119 {
 120         ath79_gpio_function_setup(AR724X_GPIO_FUNC_SPI_EN,
 121                                   AR724X_GPIO_FUNC_JTAG_DISABLE);
 122         rb750_latch_change(0, RB750_LVC573_LE);
 123 }
 124
 125 static void __init rb750_setup(void)
 126 {
 127         ath79_gpio_function_disable(AR724X_GPIO_FUNC_ETH_SWITCH_LED0_EN |
 128                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED1_EN |
 129                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED2_EN |
 130                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED3_EN |
 131                                      AR724X_GPIO_FUNC_ETH_SWITCH_LED4_EN);
 132
 133         ath79_init_mac(ath79_eth0_data.mac_addr, ath79_mac_base, 0);
 134         ath79_init_mac(ath79_eth1_data.mac_addr, ath79_mac_base, 1);
 135
 136         ath79_register_mdio(0, 0x0);
 137
 138         /* LAN ports */
 139         ath79_register_eth(1);
 140
 141         /* WAN port */
 142         ath79_register_eth(0);
 143
 144         rb750_leds_data.num_leds = ARRAY_SIZE(rb750_leds);
 145         rb750_leds_data.leds = rb750_leds;
 146         rb750_leds_data.latch_change = rb750_latch_change;
 147         platform_device_register(&rb750_leds_device);
 148
 149         rb750_nand_data.nce_line = RB750_NAND_NCE;
 150         rb750_nand_data.enable_pins = rb750_nand_enable_pins;
 151         rb750_nand_data.disable_pins = rb750_nand_disable_pins;
 152         rb750_nand_data.latch_change = rb750_latch_change;
 153         platform_device_register(&rb750_nand_device);
 154 }
 155
 156 MIPS_MACHINE(ATH79_MACH_RB_750, "750i", "MikroTik RouterBOARD 750",
 157              rb750_setup);