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 mask_inv;
  40         u32 t;
  41
  42         switch (ar71xx_soc) {
  43         case AR71XX_SOC_AR7130:
  44         case AR71XX_SOC_AR7141:
  45         case AR71XX_SOC_AR7161:
  46                 local_irq_save(flags);
  47                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
  48                 ar71xx_reset_wr(AR71XX_RESET_REG_RESET_MODULE, t | mask);
  49                 local_irq_restore(flags);
  50                 break;
  51
  52         case AR71XX_SOC_AR7240:
  53                 mask_inv = mask & RESET_MODULE_USB_OHCI_DLL_7240;
  54                 local_irq_save(flags);
  55                 t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
  56                 t |= mask;
  57                 t &= ~mask_inv;
  58                 ar71xx_reset_wr(AR724X_RESET_REG_RESET_MODULE, t);
  59                 local_irq_restore(flags);
  60                 break;
  61
  62         case AR71XX_SOC_AR9130:
  63         case AR71XX_SOC_AR9132:
  64                 local_irq_save(flags);
  65                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
  66                 ar71xx_reset_wr(AR91XX_RESET_REG_RESET_MODULE, t | mask);
  67                 local_irq_restore(flags);
  68                 break;
  69
  70         default:
  71                 BUG();
  72         }
  73 }
  74 EXPORT_SYMBOL_GPL(ar71xx_device_stop);
  75
  76 void ar71xx_device_start(u32 mask)
  77 {
  78         unsigned long flags;
  79         u32 mask_inv;
  80         u32 t;
  81
  82         switch (ar71xx_soc) {
  83         case AR71XX_SOC_AR7130:
  84         case AR71XX_SOC_AR7141:
  85         case AR71XX_SOC_AR7161:
  86                 local_irq_save(flags);
  87                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
  88                 ar71xx_reset_wr(AR71XX_RESET_REG_RESET_MODULE, t & ~mask);
  89                 local_irq_restore(flags);
  90                 break;
  91
  92         case AR71XX_SOC_AR7240:
  93                 mask_inv = mask & RESET_MODULE_USB_OHCI_DLL_7240;
  94                 local_irq_save(flags);
  95                 t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
  96                 t &= ~mask;
  97                 t |= mask_inv;
  98                 ar71xx_reset_wr(AR724X_RESET_REG_RESET_MODULE, t);
  99                 local_irq_restore(flags);
 100                 break;
 101
 102         case AR71XX_SOC_AR9130:
 103         case AR71XX_SOC_AR9132:
 104                 local_irq_save(flags);
 105                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
 106                 ar71xx_reset_wr(AR91XX_RESET_REG_RESET_MODULE, t & ~mask);
 107                 local_irq_restore(flags);
 108                 break;
 109
 110         default:
 111                 BUG();
 112         }
 113 }
 114 EXPORT_SYMBOL_GPL(ar71xx_device_start);
 115
 116 int ar71xx_device_stopped(u32 mask)
 117 {
 118         unsigned long flags;
 119         u32 t;
 120
 121         switch (ar71xx_soc) {
 122         case AR71XX_SOC_AR7130:
 123         case AR71XX_SOC_AR7141:
 124         case AR71XX_SOC_AR7161:
 125                 local_irq_save(flags);
 126                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
 127                 local_irq_restore(flags);
 128                 break;
 129
 130         case AR71XX_SOC_AR7240:
 131                 local_irq_save(flags);
 132                 t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
 133                 local_irq_restore(flags);
 134                 break;
 135
 136         case AR71XX_SOC_AR9130:
 137         case AR71XX_SOC_AR9132:
 138                 local_irq_save(flags);
 139                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
 140                 local_irq_restore(flags);
 141                 break;
 142
 143         default:
 144                 BUG();
 145         }
 146
 147         return ((t & mask) == mask);
 148 }
 149 EXPORT_SYMBOL_GPL(ar71xx_device_stopped);
 150
 151 void ar71xx_ddr_flush(u32 reg)
 152 {
 153         ar71xx_ddr_wr(reg, 1);
 154         while ((ar71xx_ddr_rr(reg) & 0x1));
 155
 156         ar71xx_ddr_wr(reg, 1);
 157         while ((ar71xx_ddr_rr(reg) & 0x1));
 158 }
 159 EXPORT_SYMBOL_GPL(ar71xx_ddr_flush);
 160
 161 void ar71xx_flash_acquire(void)
 162 {
 163         mutex_lock(&ar71xx_flash_mutex);
 164 }
 165 EXPORT_SYMBOL_GPL(ar71xx_flash_acquire);
 166
 167 void ar71xx_flash_release(void)
 168 {
 169         mutex_unlock(&ar71xx_flash_mutex);
 170 }
 171 EXPORT_SYMBOL_GPL(ar71xx_flash_release);