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/mach/map.h>
26 #include <asm/mach-types.h>
27 
28 #include <mach/reset.h>
29 #include <mach/gpio.h>
30 #include <mach/smemc.h>
31 #include <mach/pxa3xx-regs.h>
32 
33 #include "generic.h"
34 
clear_reset_status(unsigned int mask)35 void clear_reset_status(unsigned int mask)
36 {
37 	if (cpu_is_pxa2xx())
38 		pxa2xx_clear_reset_status(mask);
39 	else {
40 		/* RESET_STATUS_* has a 1:1 mapping with ARSR */
41 		ARSR = mask;
42 	}
43 }
44 
get_clock_tick_rate(void)45 unsigned long get_clock_tick_rate(void)
46 {
47 	unsigned long clock_tick_rate;
48 
49 	if (cpu_is_pxa25x())
50 		clock_tick_rate = 3686400;
51 	else if (machine_is_mainstone())
52 		clock_tick_rate = 3249600;
53 	else
54 		clock_tick_rate = 3250000;
55 
56 	return clock_tick_rate;
57 }
58 EXPORT_SYMBOL(get_clock_tick_rate);
59 
60 /*
61  * Get the clock frequency as reflected by CCCR and the turbo flag.
62  * We assume these values have been applied via a fcs.
63  * If info is not 0 we also display the current settings.
64  */
get_clk_frequency_khz(int info)65 unsigned int get_clk_frequency_khz(int info)
66 {
67 	if (cpu_is_pxa25x())
68 		return pxa25x_get_clk_frequency_khz(info);
69 	else if (cpu_is_pxa27x())
70 		return pxa27x_get_clk_frequency_khz(info);
71 	return 0;
72 }
73 EXPORT_SYMBOL(get_clk_frequency_khz);
74 
75 /*
76  * Intel PXA2xx internal register mapping.
77  *
78  * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
79  *       and cache flush area.
80  */
81 static struct map_desc common_io_desc[] __initdata = {
82   	{	/* Devs */
83 		.virtual	=  0xf2000000,
84 		.pfn		= __phys_to_pfn(0x40000000),
85 		.length		= 0x02000000,
86 		.type		= MT_DEVICE
87 	}, {	/* UNCACHED_PHYS_0 */
88 		.virtual	= 0xff000000,
89 		.pfn		= __phys_to_pfn(0x00000000),
90 		.length		= 0x00100000,
91 		.type		= MT_DEVICE
92 	}
93 };
94 
pxa_map_io(void)95 void __init pxa_map_io(void)
96 {
97 	iotable_init(ARRAY_AND_SIZE(common_io_desc));
98 }
99