f7be9abaa5
Move the core S3C64XX support to mach-s3c64xx as it is unlikely to be used outside of this directory. Also move the SoC header files in with it. This includes the clock, cpu, cpufreq, dma, gpiolib and pll support. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
174 lines
4.0 KiB
C
174 lines
4.0 KiB
C
/* linux/arch/arm/plat-s3c64xx/pm.c
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*
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* Copyright 2008 Openmoko, Inc.
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* Copyright 2008 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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* http://armlinux.simtec.co.uk/
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*
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* S3C64XX CPU PM support.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/suspend.h>
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#include <linux/serial_core.h>
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#include <linux/io.h>
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#include <mach/map.h>
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#include <plat/pm.h>
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#include <mach/regs-sys.h>
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#include <mach/regs-gpio.h>
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#include <mach/regs-clock.h>
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#include <mach/regs-syscon-power.h>
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#include <mach/regs-gpio-memport.h>
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#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
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#include <mach/gpio-bank-n.h>
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void s3c_pm_debug_smdkled(u32 set, u32 clear)
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{
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unsigned long flags;
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u32 reg;
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local_irq_save(flags);
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reg = __raw_readl(S3C64XX_GPNCON);
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reg &= ~(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) |
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S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15));
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reg |= S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) |
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S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15);
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__raw_writel(reg, S3C64XX_GPNCON);
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reg = __raw_readl(S3C64XX_GPNDAT);
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reg &= ~(clear << 12);
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reg |= set << 12;
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__raw_writel(reg, S3C64XX_GPNDAT);
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local_irq_restore(flags);
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}
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#endif
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static struct sleep_save core_save[] = {
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SAVE_ITEM(S3C_APLL_LOCK),
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SAVE_ITEM(S3C_MPLL_LOCK),
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SAVE_ITEM(S3C_EPLL_LOCK),
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SAVE_ITEM(S3C_CLK_SRC),
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SAVE_ITEM(S3C_CLK_DIV0),
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SAVE_ITEM(S3C_CLK_DIV1),
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SAVE_ITEM(S3C_CLK_DIV2),
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SAVE_ITEM(S3C_CLK_OUT),
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SAVE_ITEM(S3C_HCLK_GATE),
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SAVE_ITEM(S3C_PCLK_GATE),
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SAVE_ITEM(S3C_SCLK_GATE),
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SAVE_ITEM(S3C_MEM0_GATE),
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SAVE_ITEM(S3C_EPLL_CON1),
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SAVE_ITEM(S3C_EPLL_CON0),
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SAVE_ITEM(S3C64XX_MEM0DRVCON),
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SAVE_ITEM(S3C64XX_MEM1DRVCON),
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#ifndef CONFIG_CPU_FREQ
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SAVE_ITEM(S3C_APLL_CON),
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SAVE_ITEM(S3C_MPLL_CON),
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#endif
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};
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static struct sleep_save misc_save[] = {
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SAVE_ITEM(S3C64XX_AHB_CON0),
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SAVE_ITEM(S3C64XX_AHB_CON1),
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SAVE_ITEM(S3C64XX_AHB_CON2),
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SAVE_ITEM(S3C64XX_SPCON),
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SAVE_ITEM(S3C64XX_MEM0CONSTOP),
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SAVE_ITEM(S3C64XX_MEM1CONSTOP),
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SAVE_ITEM(S3C64XX_MEM0CONSLP0),
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SAVE_ITEM(S3C64XX_MEM0CONSLP1),
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SAVE_ITEM(S3C64XX_MEM1CONSLP),
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};
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void s3c_pm_configure_extint(void)
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{
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__raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
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}
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void s3c_pm_restore_core(void)
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{
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__raw_writel(0, S3C64XX_EINT_MASK);
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s3c_pm_debug_smdkled(1 << 2, 0);
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s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
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s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
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}
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void s3c_pm_save_core(void)
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{
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s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
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s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
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}
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/* since both s3c6400 and s3c6410 share the same sleep pm calls, we
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* put the per-cpu code in here until any new cpu comes along and changes
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* this.
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*/
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static void s3c64xx_cpu_suspend(void)
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{
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unsigned long tmp;
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/* set our standby method to sleep */
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tmp = __raw_readl(S3C64XX_PWR_CFG);
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tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
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tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP;
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__raw_writel(tmp, S3C64XX_PWR_CFG);
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/* clear any old wakeup */
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__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT),
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S3C64XX_WAKEUP_STAT);
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/* set the LED state to 0110 over sleep */
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s3c_pm_debug_smdkled(3 << 1, 0xf);
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/* issue the standby signal into the pm unit. Note, we
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* issue a write-buffer drain just in case */
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tmp = 0;
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asm("b 1f\n\t"
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".align 5\n\t"
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"1:\n\t"
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"mcr p15, 0, %0, c7, c10, 5\n\t"
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"mcr p15, 0, %0, c7, c10, 4\n\t"
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"mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
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/* we should never get past here */
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panic("sleep resumed to originator?");
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}
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static void s3c64xx_pm_prepare(void)
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{
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/* store address of resume. */
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__raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
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/* ensure previous wakeup state is cleared before sleeping */
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__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);
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}
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static int s3c64xx_pm_init(void)
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{
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pm_cpu_prep = s3c64xx_pm_prepare;
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pm_cpu_sleep = s3c64xx_cpu_suspend;
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pm_uart_udivslot = 1;
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return 0;
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}
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arch_initcall(s3c64xx_pm_init);
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