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/gpio.h>
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/init.h>
23
24#include <mach/hardware.h>
25#include <asm/mach/map.h>
26#include <asm/mach-types.h>
27
28#include <mach/irqs.h>
29#include <mach/reset.h>
30#include <mach/smemc.h>
31#include <mach/pxa3xx-regs.h>
32
33#include "generic.h"
34#include <clocksource/pxa.h>
35
36void clear_reset_status(unsigned int mask)
37{
38	if (cpu_is_pxa2xx())
39		pxa2xx_clear_reset_status(mask);
40	else {
41		/* RESET_STATUS_* has a 1:1 mapping with ARSR */
42		ARSR = mask;
43	}
44}
45
46unsigned long get_clock_tick_rate(void)
47{
48	unsigned long clock_tick_rate;
49
50	if (cpu_is_pxa25x())
51		clock_tick_rate = 3686400;
52	else if (machine_is_mainstone())
53		clock_tick_rate = 3249600;
54	else
55		clock_tick_rate = 3250000;
56
57	return clock_tick_rate;
58}
59EXPORT_SYMBOL(get_clock_tick_rate);
60
61/*
62 * For non device-tree builds, keep legacy timer init
63 */
64void __init pxa_timer_init(void)
65{
66	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000),
67			    get_clock_tick_rate());
68}
69
70/*
71 * Get the clock frequency as reflected by CCCR and the turbo flag.
72 * We assume these values have been applied via a fcs.
73 * If info is not 0 we also display the current settings.
74 */
75unsigned int get_clk_frequency_khz(int info)
76{
77	if (cpu_is_pxa25x())
78		return pxa25x_get_clk_frequency_khz(info);
79	else if (cpu_is_pxa27x())
80		return pxa27x_get_clk_frequency_khz(info);
81	return 0;
82}
83EXPORT_SYMBOL(get_clk_frequency_khz);
84
85/*
86 * Intel PXA2xx internal register mapping.
87 *
88 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
89 *       and cache flush area.
90 */
91static struct map_desc common_io_desc[] __initdata = {
92  	{	/* Devs */
93		.virtual	= (unsigned long)PERIPH_VIRT,
94		.pfn		= __phys_to_pfn(PERIPH_PHYS),
95		.length		= PERIPH_SIZE,
96		.type		= MT_DEVICE
97	}
98};
99
100void __init pxa_map_io(void)
101{
102	debug_ll_io_init();
103	iotable_init(ARRAY_AND_SIZE(common_io_desc));
104}
105