ce4fb7b892
This is part of the effort moving peripheral registers outside of pxa-regs.h, and using ioremap() make it possible the same IP can be re-used on different processors with different registers space As a result, the fixed mapping in pxa_map_io() is removed. The regs-lcd.h can actually moved to where closer to pxafb.c but some of its bit definitions are directly used by various platform code, though this is not a good style. Signed-off-by: eric miao <eric.miao@marvell.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
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/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/system.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/mach/map.h>
|
|
|
|
#include <asm/arch/pxa-regs.h>
|
|
|
|
#include "generic.h"
|
|
|
|
/*
|
|
* 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_pxa21x() || cpu_is_pxa25x())
|
|
return pxa25x_get_clk_frequency_khz(info);
|
|
else if (cpu_is_pxa27x())
|
|
return pxa27x_get_clk_frequency_khz(info);
|
|
else
|
|
return pxa3xx_get_clk_frequency_khz(info);
|
|
}
|
|
EXPORT_SYMBOL(get_clk_frequency_khz);
|
|
|
|
/*
|
|
* Return the current memory clock frequency in units of 10kHz
|
|
*/
|
|
unsigned int get_memclk_frequency_10khz(void)
|
|
{
|
|
if (cpu_is_pxa21x() || cpu_is_pxa25x())
|
|
return pxa25x_get_memclk_frequency_10khz();
|
|
else if (cpu_is_pxa27x())
|
|
return pxa27x_get_memclk_frequency_10khz();
|
|
else
|
|
return pxa3xx_get_memclk_frequency_10khz();
|
|
}
|
|
EXPORT_SYMBOL(get_memclk_frequency_10khz);
|
|
|
|
/*
|
|
* Routine to safely enable or disable a clock in the CKEN
|
|
*/
|
|
void __pxa_set_cken(int clock, int enable)
|
|
{
|
|
unsigned long flags;
|
|
local_irq_save(flags);
|
|
|
|
if (enable)
|
|
CKEN |= (1 << clock);
|
|
else
|
|
CKEN &= ~(1 << clock);
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(__pxa_set_cken);
|
|
|
|
/*
|
|
* Intel PXA2xx internal register mapping.
|
|
*
|
|
* Note 1: not all PXA2xx variants implement all those addresses.
|
|
*
|
|
* Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
|
|
* and cache flush area.
|
|
*/
|
|
static struct map_desc standard_io_desc[] __initdata = {
|
|
{ /* Devs */
|
|
.virtual = 0xf2000000,
|
|
.pfn = __phys_to_pfn(0x40000000),
|
|
.length = 0x02000000,
|
|
.type = MT_DEVICE
|
|
}, { /* Mem Ctl */
|
|
.virtual = 0xf6000000,
|
|
.pfn = __phys_to_pfn(0x48000000),
|
|
.length = 0x00200000,
|
|
.type = MT_DEVICE
|
|
}, { /* USB host */
|
|
.virtual = 0xf8000000,
|
|
.pfn = __phys_to_pfn(0x4c000000),
|
|
.length = 0x00100000,
|
|
.type = MT_DEVICE
|
|
}, { /* Camera */
|
|
.virtual = 0xfa000000,
|
|
.pfn = __phys_to_pfn(0x50000000),
|
|
.length = 0x00100000,
|
|
.type = MT_DEVICE
|
|
}, { /* IMem ctl */
|
|
.virtual = 0xfe000000,
|
|
.pfn = __phys_to_pfn(0x58000000),
|
|
.length = 0x00100000,
|
|
.type = MT_DEVICE
|
|
}, { /* UNCACHED_PHYS_0 */
|
|
.virtual = 0xff000000,
|
|
.pfn = __phys_to_pfn(0x00000000),
|
|
.length = 0x00100000,
|
|
.type = MT_DEVICE
|
|
}
|
|
};
|
|
|
|
void __init pxa_map_io(void)
|
|
{
|
|
iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
|
|
get_clk_frequency_khz(1);
|
|
}
|