mirror of https://gitee.com/openkylin/linux.git
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
|
/*
|
||
|
|
* Atheros AR71XX/AR724X/AR913X common routines
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
|
||
|
|
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 as published
|
||
|
|
* by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
#include <asm/mach-ath79/ath79.h>
|
||
|
|
#include <asm/mach-ath79/ar71xx_regs.h>
|
||
|
|
#include "common.h"
|
||
|
|
|
||
|
|
static DEFINE_SPINLOCK(ath79_device_reset_lock);
|
||
|
|
|
||
|
|
u32 ath79_cpu_freq;
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_cpu_freq);
|
||
|
|
|
||
|
|
u32 ath79_ahb_freq;
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_ahb_freq);
|
||
|
|
|
||
|
|
u32 ath79_ddr_freq;
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_ddr_freq);
|
||
|
|
|
||
|
|
enum ath79_soc_type ath79_soc;
|
||
|
|
|
||
|
|
void __iomem *ath79_pll_base;
|
||
|
|
void __iomem *ath79_reset_base;
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_reset_base);
|
||
|
|
void __iomem *ath79_ddr_base;
|
||
|
|
|
||
|
|
void ath79_ddr_wb_flush(u32 reg)
|
||
|
|
{
|
||
|
|
void __iomem *flush_reg = ath79_ddr_base + reg;
|
||
|
|
|
||
|
|
/* Flush the DDR write buffer. */
|
||
|
|
__raw_writel(0x1, flush_reg);
|
||
|
|
while (__raw_readl(flush_reg) & 0x1)
|
||
|
|
;
|
||
|
|
|
||
|
|
/* It must be run twice. */
|
||
|
|
__raw_writel(0x1, flush_reg);
|
||
|
|
while (__raw_readl(flush_reg) & 0x1)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_ddr_wb_flush);
|
||
|
|
|
||
|
|
void ath79_device_reset_set(u32 mask)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
u32 reg;
|
||
|
|
u32 t;
|
||
|
|
|
||
|
|
if (soc_is_ar71xx())
|
||
|
|
reg = AR71XX_RESET_REG_RESET_MODULE;
|
||
|
|
else if (soc_is_ar724x())
|
||
|
|
reg = AR724X_RESET_REG_RESET_MODULE;
|
||
|
|
else if (soc_is_ar913x())
|
||
|
|
reg = AR913X_RESET_REG_RESET_MODULE;
|
||
|
|
else
|
||
|
|
BUG();
|
||
|
|
|
||
|
|
spin_lock_irqsave(&ath79_device_reset_lock, flags);
|
||
|
|
t = ath79_reset_rr(reg);
|
||
|
|
ath79_reset_wr(reg, t | mask);
|
||
|
|
spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_device_reset_set);
|
||
|
|
|
||
|
|
void ath79_device_reset_clear(u32 mask)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
u32 reg;
|
||
|
|
u32 t;
|
||
|
|
|
||
|
|
if (soc_is_ar71xx())
|
||
|
|
reg = AR71XX_RESET_REG_RESET_MODULE;
|
||
|
|
else if (soc_is_ar724x())
|
||
|
|
reg = AR724X_RESET_REG_RESET_MODULE;
|
||
|
|
else if (soc_is_ar913x())
|
||
|
|
reg = AR913X_RESET_REG_RESET_MODULE;
|
||
|
|
else
|
||
|
|
BUG();
|
||
|
|
|
||
|
|
spin_lock_irqsave(&ath79_device_reset_lock, flags);
|
||
|
|
t = ath79_reset_rr(reg);
|
||
|
|
ath79_reset_wr(reg, t & ~mask);
|
||
|
|
spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(ath79_device_reset_clear);
|