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         case AR71XX_SOC_AR7241:
  54         case AR71XX_SOC_AR7242:
  55                 mask_inv = mask & RESET_MODULE_USB_OHCI_DLL_7240;
  56                 local_irq_save(flags);
  57                 t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
  58                 t |= mask;
  59                 t &= ~mask_inv;
  60                 ar71xx_reset_wr(AR724X_RESET_REG_RESET_MODULE, t);
  61                 local_irq_restore(flags);
  62                 break;
  63
  64         case AR71XX_SOC_AR9130:
  65         case AR71XX_SOC_AR9132:
  66                 local_irq_save(flags);
  67                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
  68                 ar71xx_reset_wr(AR91XX_RESET_REG_RESET_MODULE, t | mask);
  69                 local_irq_restore(flags);
  70                 break;
  71
  72         default:
  73                 BUG();
  74         }
  75 }
  76 EXPORT_SYMBOL_GPL(ar71xx_device_stop);
  77
  78 void ar71xx_device_start(u32 mask)
  79 {
  80         unsigned long flags;
  81         u32 mask_inv;
  82         u32 t;
  83
  84         switch (ar71xx_soc) {
  85         case AR71XX_SOC_AR7130:
  86         case AR71XX_SOC_AR7141:
  87         case AR71XX_SOC_AR7161:
  88                 local_irq_save(flags);
  89                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
  90                 ar71xx_reset_wr(AR71XX_RESET_REG_RESET_MODULE, t & ~mask);
  91                 local_irq_restore(flags);
  92                 break;
  93
  94         case AR71XX_SOC_AR7240:
  95         case AR71XX_SOC_AR7241:
  96         case AR71XX_SOC_AR7242:
  97                 mask_inv = mask & RESET_MODULE_USB_OHCI_DLL_7240;
  98                 local_irq_save(flags);
  99                 t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
 100                 t &= ~mask;
 101                 t |= mask_inv;
 102                 ar71xx_reset_wr(AR724X_RESET_REG_RESET_MODULE, t);
 103                 local_irq_restore(flags);
 104                 break;
 105
 106         case AR71XX_SOC_AR9130:
 107         case AR71XX_SOC_AR9132:
 108                 local_irq_save(flags);
 109                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
 110                 ar71xx_reset_wr(AR91XX_RESET_REG_RESET_MODULE, t & ~mask);
 111                 local_irq_restore(flags);
 112                 break;
 113
 114         default:
 115                 BUG();
 116         }
 117 }
 118 EXPORT_SYMBOL_GPL(ar71xx_device_start);
 119
 120 int ar71xx_device_stopped(u32 mask)
 121 {
 122         unsigned long flags;
 123         u32 t;
 124
 125         switch (ar71xx_soc) {
 126         case AR71XX_SOC_AR7130:
 127         case AR71XX_SOC_AR7141:
 128         case AR71XX_SOC_AR7161:
 129                 local_irq_save(flags);
 130                 t = ar71xx_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
 131                 local_irq_restore(flags);
 132                 break;
 133
 134         case AR71XX_SOC_AR7240:
 135         case AR71XX_SOC_AR7241:
 136         case AR71XX_SOC_AR7242:
 137                 local_irq_save(flags);
 138                 t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
 139                 local_irq_restore(flags);
 140                 break;
 141
 142         case AR71XX_SOC_AR9130:
 143         case AR71XX_SOC_AR9132:
 144                 local_irq_save(flags);
 145                 t = ar71xx_reset_rr(AR91XX_RESET_REG_RESET_MODULE);
 146                 local_irq_restore(flags);
 147                 break;
 148
 149         default:
 150                 BUG();
 151         }
 152
 153         return ((t & mask) == mask);
 154 }
 155 EXPORT_SYMBOL_GPL(ar71xx_device_stopped);
 156
 157 void ar71xx_ddr_flush(u32 reg)
 158 {
 159         ar71xx_ddr_wr(reg, 1);
 160         while ((ar71xx_ddr_rr(reg) & 0x1))
 161                 ;
 162
 163         ar71xx_ddr_wr(reg, 1);
 164         while ((ar71xx_ddr_rr(reg) & 0x1))
 165                 ;
 166 }
 167 EXPORT_SYMBOL_GPL(ar71xx_ddr_flush);
 168
 169 void ar71xx_flash_acquire(void)
 170 {
 171         mutex_lock(&ar71xx_flash_mutex);
 172 }
 173 EXPORT_SYMBOL_GPL(ar71xx_flash_acquire);
 174
 175 void ar71xx_flash_release(void)
 176 {
 177         mutex_unlock(&ar71xx_flash_mutex);
 178 }
 179 EXPORT_SYMBOL_GPL(ar71xx_flash_release);