[deliverable/linux.git] / arch / arm / mach-pxa / generic.c

/*
 *  linux/arch/arm/mach-pxa/generic.c
 *
 *  Author:	Nicolas Pitre
 *  Created:	Jun 15, 2001
 *  Copyright:	MontaVista Software Inc.
 *
 * Code common to all PXA machines.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Since this file should be linked before any other machine specific file,
 * the __initcall() here will be executed first.  This serves as default
 * initialization stuff for PXA machines which can be overridden later if
 * need be.
 */
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>

#include <mach/hardware.h>
#include <asm/mach/map.h>
#include <asm/mach-types.h>

#include <mach/irqs.h>
#include <mach/reset.h>
#include <mach/smemc.h>
#include <mach/pxa3xx-regs.h>

#include "generic.h"
#include <clocksource/pxa.h>

void clear_reset_status(unsigned int mask)
{
	if (cpu_is_pxa2xx())
		pxa2xx_clear_reset_status(mask);
	else {
		/* RESET_STATUS_* has a 1:1 mapping with ARSR */
		ARSR = mask;
	}
}

unsigned long get_clock_tick_rate(void)
{
	unsigned long clock_tick_rate;

	if (cpu_is_pxa25x())
		clock_tick_rate = 3686400;
	else if (machine_is_mainstone())
		clock_tick_rate = 3249600;
	else
		clock_tick_rate = 3250000;

	return clock_tick_rate;
}
EXPORT_SYMBOL(get_clock_tick_rate);

/*
 * For non device-tree builds, keep legacy timer init
 */
void __init pxa_timer_init(void)
{
	if (cpu_is_pxa25x())
		pxa25x_clocks_init();
	if (cpu_is_pxa27x())
		pxa27x_clocks_init();
	if (cpu_is_pxa3xx())
		pxa3xx_clocks_init();
	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000),
			    get_clock_tick_rate());
}

/*
 * Get the clock frequency as reflected by CCCR and the turbo flag.
 * We assume these values have been applied via a fcs.
 * If info is not 0 we also display the current settings.
 */
unsigned int get_clk_frequency_khz(int info)
{
	if (cpu_is_pxa25x())
		return pxa25x_get_clk_frequency_khz(info);
	else if (cpu_is_pxa27x())
		return pxa27x_get_clk_frequency_khz(info);
	return 0;
}
EXPORT_SYMBOL(get_clk_frequency_khz);

/*
 * Intel PXA2xx internal register mapping.
 *
 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
 *       and cache flush area.
 */
static struct map_desc common_io_desc[] __initdata = {
  	{	/* Devs */
		.virtual	= (unsigned long)PERIPH_VIRT,
		.pfn		= __phys_to_pfn(PERIPH_PHYS),
		.length		= PERIPH_SIZE,
		.type		= MT_DEVICE
	}
};

void __init pxa_map_io(void)
{
	debug_ll_io_init();
	iotable_init(ARRAY_AND_SIZE(common_io_desc));
}
Commit	Line	Data
1da177e4 LT	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	*/
2f8163ba	19	#include <linux/gpio.h>
1da177e4 LT	20	#include <linux/module.h>
	21	#include <linux/kernel.h>
	22	#include <linux/init.h>
1da177e4	23
a09e64fb	24	#include <mach/hardware.h>
1da177e4	25	#include <asm/mach/map.h>
6769717d	26	#include <asm/mach-types.h>
1da177e4	27
a38b1f60	28	#include <mach/irqs.h>
afd2fc02	29	#include <mach/reset.h>
ad68bb9f	30	#include <mach/smemc.h>
a4553358	31	#include <mach/pxa3xx-regs.h>
1da177e4 LT	32
1da177e4 LT	33	#include "generic.h"
a38b1f60	34	#include <clocksource/pxa.h>
1da177e4	35
04fef228 EM	36	void clear_reset_status(unsigned int mask)
	37	{
	38	if (cpu_is_pxa2xx())
	39	pxa2xx_clear_reset_status(mask);
a4553358 HZ	40	else {
	41	/* RESET_STATUS_* has a 1:1 mapping with ARSR */
	42	ARSR = mask;
	43	}
04fef228 EM	44	}
04fef228 EM	45
6769717d EM	46	unsigned 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	}
	59	EXPORT_SYMBOL(get_clock_tick_rate);
	60
a38b1f60 RJ	61	/*
	62	* For non device-tree builds, keep legacy timer init
	63	*/
3d3c6a5f	64	void __init pxa_timer_init(void)
a38b1f60	65	{
5e1d0128 RJ	66	if (cpu_is_pxa25x())
	67	pxa25x_clocks_init();
	68	if (cpu_is_pxa27x())
	69	pxa27x_clocks_init();
a1c0a6ad RJ	70	if (cpu_is_pxa3xx())
a1c0a6ad RJ	71	pxa3xx_clocks_init();
a38b1f60 RJ	72	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000),
	73	get_clock_tick_rate());
	74	}
	75
15a40333 RK	76	/*
	77	* Get the clock frequency as reflected by CCCR and the turbo flag.
	78	* We assume these values have been applied via a fcs.
	79	* If info is not 0 we also display the current settings.
	80	*/
	81	unsigned int get_clk_frequency_khz(int info)
	82	{
0ffcbfd5	83	if (cpu_is_pxa25x())
15a40333	84	return pxa25x_get_clk_frequency_khz(info);
2c8086a5	85	else if (cpu_is_pxa27x())
15a40333	86	return pxa27x_get_clk_frequency_khz(info);
ecf89b8a	87	return 0;
15a40333 RK	88	}
	89	EXPORT_SYMBOL(get_clk_frequency_khz);
	90
1da177e4 LT	91	/*
	92	* Intel PXA2xx internal register mapping.
	93	*
851982c1 MV	94	* Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
851982c1 MV	95	* and cache flush area.
1da177e4	96	*/
851982c1	97	static struct map_desc common_io_desc[] __initdata = {
6f9182eb	98	{ /* Devs */
0e32986c LP	99	.virtual = (unsigned long)PERIPH_VIRT,
	100	.pfn = __phys_to_pfn(PERIPH_PHYS),
	101	.length = PERIPH_SIZE,
6f9182eb DS	102	.type = MT_DEVICE
6f9182eb DS	103	}
1da177e4 LT	104	};
	105
	106	void __init pxa_map_io(void)
	107	{
2111667b	108	debug_ll_io_init();
851982c1	109	iotable_init(ARRAY_AND_SIZE(common_io_desc));
1da177e4	110	}