Root/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
19static DEFINE_MUTEX(ar71xx_flash_mutex);
20
21void __iomem *ar71xx_ddr_base;
22EXPORT_SYMBOL_GPL(ar71xx_ddr_base);
23
24void __iomem *ar71xx_pll_base;
25EXPORT_SYMBOL_GPL(ar71xx_pll_base);
26
27void __iomem *ar71xx_reset_base;
28EXPORT_SYMBOL_GPL(ar71xx_reset_base);
29
30void __iomem *ar71xx_gpio_base;
31EXPORT_SYMBOL_GPL(ar71xx_gpio_base);
32
33void __iomem *ar71xx_usb_ctrl_base;
34EXPORT_SYMBOL_GPL(ar71xx_usb_ctrl_base);
35
36void 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}
76EXPORT_SYMBOL_GPL(ar71xx_device_stop);
77
78void 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}
118EXPORT_SYMBOL_GPL(ar71xx_device_start);
119
120int 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}
155EXPORT_SYMBOL_GPL(ar71xx_device_stopped);
156
157void ar71xx_ddr_flush(u32 reg)
158{
159    ar71xx_ddr_wr(reg, 1);
160    while ((ar71xx_ddr_rr(reg) & 0x1));
161
162    ar71xx_ddr_wr(reg, 1);
163    while ((ar71xx_ddr_rr(reg) & 0x1));
164}
165EXPORT_SYMBOL_GPL(ar71xx_ddr_flush);
166
167void ar71xx_flash_acquire(void)
168{
169    mutex_lock(&ar71xx_flash_mutex);
170}
171EXPORT_SYMBOL_GPL(ar71xx_flash_acquire);
172
173void ar71xx_flash_release(void)
174{
175    mutex_unlock(&ar71xx_flash_mutex);
176}
177EXPORT_SYMBOL_GPL(ar71xx_flash_release);
178

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