forked from luck/tmp_suning_uos_patched
4b053e7a32
Add S3C2412 power management code, and move the core register saving in from s3c2412.c Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
182 lines
4.2 KiB
C
182 lines
4.2 KiB
C
/* linux/arch/arm/mach-s3c2410/s3c2412.c
|
|
*
|
|
* Copyright (c) 2006 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* http://armlinux.simtec.co.uk/.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sysdev.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/proc-fns.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include <asm/arch/idle.h>
|
|
|
|
#include <asm/arch/regs-clock.h>
|
|
#include <asm/arch/regs-serial.h>
|
|
#include <asm/arch/regs-power.h>
|
|
#include <asm/arch/regs-gpio.h>
|
|
#include <asm/arch/regs-gpioj.h>
|
|
#include <asm/arch/regs-dsc.h>
|
|
|
|
#include "s3c2412.h"
|
|
#include "cpu.h"
|
|
#include "devs.h"
|
|
#include "clock.h"
|
|
#include "pm.h"
|
|
|
|
#ifndef CONFIG_CPU_S3C2412_ONLY
|
|
void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
|
|
|
|
static inline void s3c2412_init_gpio2(void)
|
|
{
|
|
s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
|
|
}
|
|
#else
|
|
#define s3c2412_init_gpio2() do { } while(0)
|
|
#endif
|
|
|
|
/* Initial IO mappings */
|
|
|
|
static struct map_desc s3c2412_iodesc[] __initdata = {
|
|
IODESC_ENT(CLKPWR),
|
|
IODESC_ENT(LCD),
|
|
IODESC_ENT(TIMER),
|
|
IODESC_ENT(ADC),
|
|
IODESC_ENT(WATCHDOG),
|
|
};
|
|
|
|
/* uart registration process */
|
|
|
|
void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
|
|
{
|
|
s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
|
|
|
|
/* rename devices that are s3c2412/s3c2413 specific */
|
|
s3c_device_sdi.name = "s3c2412-sdi";
|
|
s3c_device_lcd.name = "s3c2412-lcd";
|
|
s3c_device_nand.name = "s3c2412-nand";
|
|
}
|
|
|
|
/* s3c2412_idle
|
|
*
|
|
* use the standard idle call by ensuring the idle mode
|
|
* in power config, then issuing the idle co-processor
|
|
* instruction
|
|
*/
|
|
|
|
static void s3c2412_idle(void)
|
|
{
|
|
unsigned long tmp;
|
|
|
|
/* ensure our idle mode is to go to idle */
|
|
|
|
tmp = __raw_readl(S3C2412_PWRCFG);
|
|
tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
|
|
tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
|
|
__raw_writel(tmp, S3C2412_PWRCFG);
|
|
|
|
cpu_do_idle();
|
|
}
|
|
|
|
/* s3c2412_map_io
|
|
*
|
|
* register the standard cpu IO areas, and any passed in from the
|
|
* machine specific initialisation.
|
|
*/
|
|
|
|
void __init s3c2412_map_io(struct map_desc *mach_desc, int mach_size)
|
|
{
|
|
/* move base of IO */
|
|
|
|
s3c2412_init_gpio2();
|
|
|
|
/* set our idle function */
|
|
|
|
s3c24xx_idle = s3c2412_idle;
|
|
|
|
/* register our io-tables */
|
|
|
|
iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
|
|
iotable_init(mach_desc, mach_size);
|
|
}
|
|
|
|
void __init s3c2412_init_clocks(int xtal)
|
|
{
|
|
unsigned long tmp;
|
|
unsigned long fclk;
|
|
unsigned long hclk;
|
|
unsigned long pclk;
|
|
|
|
/* now we've got our machine bits initialised, work out what
|
|
* clocks we've got */
|
|
|
|
fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2);
|
|
|
|
tmp = __raw_readl(S3C2410_CLKDIVN);
|
|
|
|
/* work out clock scalings */
|
|
|
|
hclk = fclk / ((tmp & S3C2412_CLKDIVN_HDIVN_MASK) + 1);
|
|
hclk /= ((tmp & S3C2421_CLKDIVN_ARMDIVN) ? 2 : 1);
|
|
pclk = hclk / ((tmp & S3C2412_CLKDIVN_PDIVN) ? 2 : 1);
|
|
|
|
/* print brieft summary of clocks, etc */
|
|
|
|
printk("S3C2412: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
|
|
print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
|
|
|
|
/* initialise the clocks here, to allow other things like the
|
|
* console to use them
|
|
*/
|
|
|
|
s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
|
|
s3c2412_baseclk_add();
|
|
}
|
|
|
|
/* need to register class before we actually register the device, and
|
|
* we also need to ensure that it has been initialised before any of the
|
|
* drivers even try to use it (even if not on an s3c2412 based system)
|
|
* as a driver which may support both 2410 and 2440 may try and use it.
|
|
*/
|
|
|
|
struct sysdev_class s3c2412_sysclass = {
|
|
set_kset_name("s3c2412-core"),
|
|
};
|
|
|
|
static int __init s3c2412_core_init(void)
|
|
{
|
|
return sysdev_class_register(&s3c2412_sysclass);
|
|
}
|
|
|
|
core_initcall(s3c2412_core_init);
|
|
|
|
static struct sys_device s3c2412_sysdev = {
|
|
.cls = &s3c2412_sysclass,
|
|
};
|
|
|
|
int __init s3c2412_init(void)
|
|
{
|
|
printk("S3C2412: Initialising architecture\n");
|
|
|
|
return sysdev_register(&s3c2412_sysdev);
|
|
}
|