target/linux/ar71xx/files/arch/mips/ar71xx/ar71xx.c

   1 /*
   2  *  AR71xx SoC routines
   3  *
   4  *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify it
   8  *  under the terms of the GNU General Public License version 2 as published
   9  *  by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <linux/mutex.h>
  16
  17 #include <asm/mach-ar71xx/ar71xx.h>
  18
  19 static DEFINE_MUTEX(ar71xx_flash_mutex);
  20
  21 void __iomem *ar71xx_ddr_base;
  22 EXPORT_SYMBOL_GPL(ar71xx_ddr_base);
  23
  24 void __iomem *ar71xx_pll_base;
  25 EXPORT_SYMBOL_GPL(ar71xx_pll_base);
  26
  27 void __iomem *ar71xx_reset_base;
  28 EXPORT_SYMBOL_GPL(ar71xx_reset_base);
  29
  30 void __iomem *ar71xx_gpio_base;
  31 EXPORT_SYMBOL_GPL(ar71xx_gpio_base);
  32
  33 void __iomem *ar71xx_usb_ctrl_base;
  34 EXPORT_SYMBOL_GPL(ar71xx_usb_ctrl_base);
  35
  36 void ar71xx_device_stop(u32 mask)
  37 {
  38         unsigned long flags;
  39         u32 t;
  40
  41         switch (ar71xx_soc) {
  42         case AR71XX_SOC_AR7130:
  43         case AR71XX_SOC_AR7141:
  44         case AR71XX_SOC_AR7161:
  45                 local_irq_save(flags);
  46                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
  47                 ar71xx_reset_wr(AR71XX_RESET_REG_RESET_MODULE, t | mask);
  48                 local_irq_restore(flags);
  49                 break;
  50
  51         case AR71XX_SOC_AR9130:
  52         case AR71XX_SOC_AR9132:
  53                 local_irq_save(flags);
  54                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
  55                 ar71xx_reset_wr(AR91XX_RESET_REG_RESET_MODULE, t | mask);
  56                 local_irq_restore(flags);
  57                 break;
  58
  59         default:
  60                 BUG();
  61         }
  62 }
  63 EXPORT_SYMBOL_GPL(ar71xx_device_stop);
  64
  65 void ar71xx_device_start(u32 mask)
  66 {
  67         unsigned long flags;
  68         u32 t;
  69
  70         switch (ar71xx_soc) {
  71         case AR71XX_SOC_AR7130:
  72         case AR71XX_SOC_AR7141:
  73         case AR71XX_SOC_AR7161:
  74                 local_irq_save(flags);
  75                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
  76                 ar71xx_reset_wr(AR71XX_RESET_REG_RESET_MODULE, t & ~mask);
  77                 local_irq_restore(flags);
  78                 break;
  79
  80         case AR71XX_SOC_AR9130:
  81         case AR71XX_SOC_AR9132:
  82                 local_irq_save(flags);
  83                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
  84                 ar71xx_reset_wr(AR91XX_RESET_REG_RESET_MODULE, t & ~mask);
  85                 local_irq_restore(flags);
  86                 break;
  87
  88         default:
  89                 BUG();
  90         }
  91 }
  92 EXPORT_SYMBOL_GPL(ar71xx_device_start);
  93
  94 void ar71xx_ddr_flush(u32 reg)
  95 {
  96         ar71xx_ddr_wr(reg, 1);
  97         while ((ar71xx_ddr_rr(reg) & 0x1));
  98
  99         ar71xx_ddr_wr(reg, 1);
 100         while ((ar71xx_ddr_rr(reg) & 0x1));
 101 }
 102 EXPORT_SYMBOL_GPL(ar71xx_ddr_flush);
 103
 104 void ar71xx_flash_acquire(void)
 105 {
 106         mutex_lock(&ar71xx_flash_mutex);
 107 }
 108 EXPORT_SYMBOL_GPL(ar71xx_flash_acquire);
 109
 110 void ar71xx_flash_release(void)
 111 {
 112         mutex_unlock(&ar71xx_flash_mutex);
 113 }
 114 EXPORT_SYMBOL_GPL(ar71xx_flash_release);