Blackfin arch: add RSI's definitions to bf514 and bf516
[linux-2.6] / arch / arm / mach-pxa / generic.c
1 /*
2  *  linux/arch/arm/mach-pxa/generic.c
3  *
4  *  Author:     Nicolas Pitre
5  *  Created:    Jun 15, 2001
6  *  Copyright:  MontaVista Software Inc.
7  *
8  * Code common to all PXA machines.
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  *
14  * Since this file should be linked before any other machine specific file,
15  * the __initcall() here will be executed first.  This serves as default
16  * initialization stuff for PXA machines which can be overridden later if
17  * need be.
18  */
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22
23 #include <mach/hardware.h>
24 #include <asm/system.h>
25 #include <asm/pgtable.h>
26 #include <asm/mach/map.h>
27 #include <asm/mach-types.h>
28
29 #include <mach/pxa-regs.h>
30 #include <mach/reset.h>
31
32 #include "generic.h"
33
34 void clear_reset_status(unsigned int mask)
35 {
36         if (cpu_is_pxa2xx())
37                 pxa2xx_clear_reset_status(mask);
38
39         if (cpu_is_pxa3xx())
40                 pxa3xx_clear_reset_status(mask);
41 }
42
43 unsigned long get_clock_tick_rate(void)
44 {
45         unsigned long clock_tick_rate;
46
47         if (cpu_is_pxa25x())
48                 clock_tick_rate = 3686400;
49         else if (machine_is_mainstone())
50                 clock_tick_rate = 3249600;
51         else
52                 clock_tick_rate = 3250000;
53
54         return clock_tick_rate;
55 }
56 EXPORT_SYMBOL(get_clock_tick_rate);
57
58 /*
59  * Get the clock frequency as reflected by CCCR and the turbo flag.
60  * We assume these values have been applied via a fcs.
61  * If info is not 0 we also display the current settings.
62  */
63 unsigned int get_clk_frequency_khz(int info)
64 {
65         if (cpu_is_pxa25x())
66                 return pxa25x_get_clk_frequency_khz(info);
67         else if (cpu_is_pxa27x())
68                 return pxa27x_get_clk_frequency_khz(info);
69         else
70                 return pxa3xx_get_clk_frequency_khz(info);
71 }
72 EXPORT_SYMBOL(get_clk_frequency_khz);
73
74 /*
75  * Return the current memory clock frequency in units of 10kHz
76  */
77 unsigned int get_memclk_frequency_10khz(void)
78 {
79         if (cpu_is_pxa25x())
80                 return pxa25x_get_memclk_frequency_10khz();
81         else if (cpu_is_pxa27x())
82                 return pxa27x_get_memclk_frequency_10khz();
83         else
84                 return pxa3xx_get_memclk_frequency_10khz();
85 }
86 EXPORT_SYMBOL(get_memclk_frequency_10khz);
87
88 /*
89  * Intel PXA2xx internal register mapping.
90  *
91  * Note 1: not all PXA2xx variants implement all those addresses.
92  *
93  * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
94  *         and cache flush area.
95  */
96 static struct map_desc standard_io_desc[] __initdata = {
97         {       /* Devs */
98                 .virtual        =  0xf2000000,
99                 .pfn            = __phys_to_pfn(0x40000000),
100                 .length         = 0x02000000,
101                 .type           = MT_DEVICE
102         }, {    /* Mem Ctl */
103                 .virtual        =  0xf6000000,
104                 .pfn            = __phys_to_pfn(0x48000000),
105                 .length         = 0x00200000,
106                 .type           = MT_DEVICE
107         }, {    /* Camera */
108                 .virtual        =  0xfa000000,
109                 .pfn            = __phys_to_pfn(0x50000000),
110                 .length         = 0x00100000,
111                 .type           = MT_DEVICE
112         }, {    /* IMem ctl */
113                 .virtual        =  0xfe000000,
114                 .pfn            = __phys_to_pfn(0x58000000),
115                 .length         = 0x00100000,
116                 .type           = MT_DEVICE
117         }, {    /* UNCACHED_PHYS_0 */
118                 .virtual        = 0xff000000,
119                 .pfn            = __phys_to_pfn(0x00000000),
120                 .length         = 0x00100000,
121                 .type           = MT_DEVICE
122         }
123 };
124
125 void __init pxa_map_io(void)
126 {
127         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
128         get_clk_frequency_khz(1);
129 }