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Ben Dooks
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Russell King
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Sep 25, 2006
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 34348012d6b43eca5e241fe97381420d5758866c | ||
| refs/heads/master: 0033a2f0d028400ad04588efbd5740c73f0eb740 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| /* linux/arch/arm/mach-s3c2410/s3c2410-pm.c | ||
| * | ||
| * Copyright (c) 2006 Simtec Electronics | ||
| * Ben Dooks <ben@simtec.co.uk> | ||
| * | ||
| * S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| */ | ||
|
|
||
| #include <linux/init.h> | ||
| #include <linux/suspend.h> | ||
| #include <linux/errno.h> | ||
| #include <linux/time.h> | ||
| #include <linux/sysdev.h> | ||
|
|
||
| #include <asm/hardware.h> | ||
| #include <asm/io.h> | ||
|
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| #include <asm/arch/regs-gpio.h> | ||
|
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| #include "cpu.h" | ||
| #include "pm.h" | ||
|
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| #ifdef CONFIG_S3C2410_PM_DEBUG | ||
| extern void pm_dbg(const char *fmt, ...); | ||
| #define DBG(fmt...) pm_dbg(fmt) | ||
| #else | ||
| #define DBG(fmt...) printk(KERN_DEBUG fmt) | ||
| #endif | ||
|
|
||
| static void s3c2410_pm_prepare(void) | ||
| { | ||
| /* ensure at least GSTATUS3 has the resume address */ | ||
|
|
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| __raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2410_GSTATUS3); | ||
|
|
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| DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3)); | ||
| DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4)); | ||
| } | ||
|
|
||
| int s3c2410_pm_resume(struct sys_device *dev) | ||
| { | ||
| unsigned long tmp; | ||
|
|
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| /* unset the return-from-sleep flag, to ensure reset */ | ||
|
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| tmp = __raw_readl(S3C2410_GSTATUS2); | ||
| tmp &= S3C2410_GSTATUS2_OFFRESET; | ||
| __raw_writel(tmp, S3C2410_GSTATUS2); | ||
|
|
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| return 0; | ||
| } | ||
|
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| static int s3c2410_pm_add(struct sys_device *dev) | ||
| { | ||
| pm_cpu_prep = s3c2410_pm_prepare; | ||
| pm_cpu_sleep = s3c2410_cpu_suspend; | ||
|
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| return 0; | ||
| } | ||
|
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| static struct sysdev_driver s3c2410_pm_driver = { | ||
| .add = s3c2410_pm_add, | ||
| .resume = s3c2410_pm_resume, | ||
| }; | ||
|
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||
| /* register ourselves */ | ||
|
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| static int __init s3c2410_pm_drvinit(void) | ||
| { | ||
| return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_pm_driver); | ||
| } | ||
|
|
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| arch_initcall(s3c2410_pm_drvinit); | ||
|
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| static struct sysdev_driver s3c2440_pm_driver = { | ||
| .add = s3c2410_pm_add, | ||
| .resume = s3c2410_pm_resume, | ||
| }; | ||
|
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| static int __init s3c2440_pm_drvinit(void) | ||
| { | ||
| return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_pm_driver); | ||
| } | ||
|
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| arch_initcall(s3c2440_pm_drvinit); | ||
|
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| static struct sysdev_driver s3c2442_pm_driver = { | ||
| .add = s3c2410_pm_add, | ||
| .resume = s3c2410_pm_resume, | ||
| }; | ||
|
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| static int __init s3c2442_pm_drvinit(void) | ||
| { | ||
| return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_pm_driver); | ||
| } | ||
|
|
||
| arch_initcall(s3c2442_pm_drvinit); |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,68 @@ | ||
| /* linux/arch/arm/mach-s3c2410/s3c2410-sleep.S | ||
| * | ||
| * Copyright (c) 2004 Simtec Electronics | ||
| * Ben Dooks <ben@simtec.co.uk> | ||
| * | ||
| * S3C2410 Power Manager (Suspend-To-RAM) support | ||
| * | ||
| * Based on PXA/SA1100 sleep code by: | ||
| * Nicolas Pitre, (c) 2002 Monta Vista Software Inc | ||
| * Cliff Brake, (c) 2001 | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| */ | ||
|
|
||
| #include <linux/linkage.h> | ||
| #include <asm/assembler.h> | ||
| #include <asm/hardware.h> | ||
| #include <asm/arch/map.h> | ||
|
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||
| #include <asm/arch/regs-gpio.h> | ||
| #include <asm/arch/regs-clock.h> | ||
| #include <asm/arch/regs-mem.h> | ||
| #include <asm/arch/regs-serial.h> | ||
|
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| /* s3c2410_cpu_suspend | ||
| * | ||
| * put the cpu into sleep mode | ||
| */ | ||
|
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| ENTRY(s3c2410_cpu_suspend) | ||
| @@ prepare cpu to sleep | ||
|
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| ldr r4, =S3C2410_REFRESH | ||
| ldr r5, =S3C24XX_MISCCR | ||
| ldr r6, =S3C2410_CLKCON | ||
| ldr r7, [ r4 ] @ get REFRESH (and ensure in TLB) | ||
| ldr r8, [ r5 ] @ get MISCCR (and ensure in TLB) | ||
| ldr r9, [ r6 ] @ get CLKCON (and ensure in TLB) | ||
|
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| orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command | ||
| orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals | ||
| orr r9, r9, #S3C2410_CLKCON_POWER @ power down command | ||
|
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| teq pc, #0 @ first as a trial-run to load cache | ||
| bl s3c2410_do_sleep | ||
| teq r0, r0 @ now do it for real | ||
| b s3c2410_do_sleep @ | ||
|
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| @@ align next bit of code to cache line | ||
| .align 8 | ||
| s3c2410_do_sleep: | ||
| streq r7, [ r4 ] @ SDRAM sleep command | ||
| streq r8, [ r5 ] @ SDRAM power-down config | ||
| streq r9, [ r6 ] @ CPU sleep | ||
| 1: beq 1b | ||
| mov pc, r14 |
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