2 * Atheros AR71XX/AR724X/AR913X common routines
4 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
5 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/spinlock.h>
20 #include <asm/mach-ath79/ath79.h>
21 #include <asm/mach-ath79/ar71xx_regs.h>
24 static DEFINE_SPINLOCK(ath79_device_reset_lock);
27 EXPORT_SYMBOL_GPL(ath79_cpu_freq);
30 EXPORT_SYMBOL_GPL(ath79_ahb_freq);
33 EXPORT_SYMBOL_GPL(ath79_ddr_freq);
35 enum ath79_soc_type ath79_soc;
36 unsigned int ath79_soc_rev;
38 void __iomem *ath79_pll_base;
39 void __iomem *ath79_reset_base;
40 EXPORT_SYMBOL_GPL(ath79_reset_base);
41 void __iomem *ath79_ddr_base;
43 void ath79_ddr_wb_flush(u32 reg)
45 void __iomem *flush_reg = ath79_ddr_base + reg;
47 /* Flush the DDR write buffer. */
48 __raw_writel(0x1, flush_reg);
49 while (__raw_readl(flush_reg) & 0x1)
52 /* It must be run twice. */
53 __raw_writel(0x1, flush_reg);
54 while (__raw_readl(flush_reg) & 0x1)
57 EXPORT_SYMBOL_GPL(ath79_ddr_wb_flush);
59 void ath79_device_reset_set(u32 mask)
66 reg = AR71XX_RESET_REG_RESET_MODULE;
67 else if (soc_is_ar724x())
68 reg = AR724X_RESET_REG_RESET_MODULE;
69 else if (soc_is_ar913x())
70 reg = AR913X_RESET_REG_RESET_MODULE;
71 else if (soc_is_ar933x())
72 reg = AR933X_RESET_REG_RESET_MODULE;
73 else if (soc_is_ar934x())
74 reg = AR934X_RESET_REG_RESET_MODULE;
78 spin_lock_irqsave(&ath79_device_reset_lock, flags);
79 t = ath79_reset_rr(reg);
80 ath79_reset_wr(reg, t | mask);
81 spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
83 EXPORT_SYMBOL_GPL(ath79_device_reset_set);
85 void ath79_device_reset_clear(u32 mask)
92 reg = AR71XX_RESET_REG_RESET_MODULE;
93 else if (soc_is_ar724x())
94 reg = AR724X_RESET_REG_RESET_MODULE;
95 else if (soc_is_ar913x())
96 reg = AR913X_RESET_REG_RESET_MODULE;
97 else if (soc_is_ar933x())
98 reg = AR933X_RESET_REG_RESET_MODULE;
99 else if (soc_is_ar934x())
100 reg = AR934X_RESET_REG_RESET_MODULE;
104 spin_lock_irqsave(&ath79_device_reset_lock, flags);
105 t = ath79_reset_rr(reg);
106 ath79_reset_wr(reg, t & ~mask);
107 spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
109 EXPORT_SYMBOL_GPL(ath79_device_reset_clear);