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authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-14 16:42:43 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-14 16:42:43 -0400
commit2cf4d4514d5b43c1f3b64bd0ec8b9853bde8f1dc (patch)
treee35a625496acc6ac852846d40b8851186b9d1ac4 /arch/arm/plat-s3c64xx/pm.c
parent44b7532b8b464f606053562400719c9c21276037 (diff)
parentce53895a5d24e0ee19fb92f56c17323fb4c9ab27 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (417 commits) MAINTAINERS: EB110ATX is not ebsa110 MAINTAINERS: update Eric Miao's email address and status fb: add support of LCD display controller on pxa168/910 (base layer) [ARM] 5552/1: ep93xx get_uart_rate(): use EP93XX_SYSCON_PWRCNT and EP93XX_SYSCON_PWRCN [ARM] pxa/sharpsl_pm: zaurus needs generic pxa suspend/resume routines [ARM] 5544/1: Trust PrimeCell resource sizes [ARM] pxa/sharpsl_pm: cleanup of gpio-related code. [ARM] pxa/sharpsl_pm: drop set_irq_type calls [ARM] pxa/sharpsl_pm: merge pxa-specific code into generic one [ARM] pxa/sharpsl_pm: merge the two sharpsl_pm.c since it's now pxa specific [ARM] sa1100: remove unused collie_pm.c [ARM] pxa: fix the conflicting non-static declarations of global_gpios[] [ARM] 5550/1: Add default configure file for w90p910 platform [ARM] 5549/1: Add clock api for w90p910 platform. [ARM] 5548/1: Add gpio api for w90p910 platform [ARM] 5551/1: Add multi-function pin api for w90p910 platform. [ARM] Make ARM_VIC_NR depend on ARM_VIC [ARM] 5546/1: ARM PL022 SSP/SPI driver v3 ARM: OMAP4: SMP: Update defconfig for OMAP4430 ARM: OMAP4: SMP: Enable SMP support for OMAP4430 ...
Diffstat (limited to 'arch/arm/plat-s3c64xx/pm.c')
-rw-r--r--arch/arm/plat-s3c64xx/pm.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c64xx/pm.c b/arch/arm/plat-s3c64xx/pm.c
new file mode 100644
index 000000000000..07a6516a4f3c
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/pm.c
@@ -0,0 +1,175 @@
1/* linux/arch/arm/plat-s3c64xx/pm.c
2 *
3 * Copyright 2008 Openmoko, Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/
7 *
8 * S3C64XX CPU PM support.
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
15#include <linux/init.h>
16#include <linux/suspend.h>
17#include <linux/serial_core.h>
18#include <linux/io.h>
19
20#include <mach/map.h>
21
22#include <plat/pm.h>
23#include <plat/regs-sys.h>
24#include <plat/regs-gpio.h>
25#include <plat/regs-clock.h>
26#include <plat/regs-syscon-power.h>
27#include <plat/regs-gpio-memport.h>
28
29#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
30#include <plat/gpio-bank-n.h>
31
32void s3c_pm_debug_smdkled(u32 set, u32 clear)
33{
34 unsigned long flags;
35 u32 reg;
36
37 local_irq_save(flags);
38 reg = __raw_readl(S3C64XX_GPNCON);
39 reg &= ~(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) |
40 S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15));
41 reg |= S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) |
42 S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15);
43 __raw_writel(reg, S3C64XX_GPNCON);
44
45 reg = __raw_readl(S3C64XX_GPNDAT);
46 reg &= ~(clear << 12);
47 reg |= set << 12;
48 __raw_writel(reg, S3C64XX_GPNDAT);
49
50 local_irq_restore(flags);
51}
52#endif
53
54static struct sleep_save core_save[] = {
55 SAVE_ITEM(S3C_APLL_LOCK),
56 SAVE_ITEM(S3C_MPLL_LOCK),
57 SAVE_ITEM(S3C_EPLL_LOCK),
58 SAVE_ITEM(S3C_CLK_SRC),
59 SAVE_ITEM(S3C_CLK_DIV0),
60 SAVE_ITEM(S3C_CLK_DIV1),
61 SAVE_ITEM(S3C_CLK_DIV2),
62 SAVE_ITEM(S3C_CLK_OUT),
63 SAVE_ITEM(S3C_HCLK_GATE),
64 SAVE_ITEM(S3C_PCLK_GATE),
65 SAVE_ITEM(S3C_SCLK_GATE),
66 SAVE_ITEM(S3C_MEM0_GATE),
67
68 SAVE_ITEM(S3C_EPLL_CON1),
69 SAVE_ITEM(S3C_EPLL_CON0),
70
71 SAVE_ITEM(S3C64XX_MEM0DRVCON),
72 SAVE_ITEM(S3C64XX_MEM1DRVCON),
73
74#ifndef CONFIG_CPU_FREQ
75 SAVE_ITEM(S3C_APLL_CON),
76 SAVE_ITEM(S3C_MPLL_CON),
77#endif
78};
79
80static struct sleep_save misc_save[] = {
81 SAVE_ITEM(S3C64XX_AHB_CON0),
82 SAVE_ITEM(S3C64XX_AHB_CON1),
83 SAVE_ITEM(S3C64XX_AHB_CON2),
84
85 SAVE_ITEM(S3C64XX_SPCON),
86
87 SAVE_ITEM(S3C64XX_MEM0CONSTOP),
88 SAVE_ITEM(S3C64XX_MEM1CONSTOP),
89 SAVE_ITEM(S3C64XX_MEM0CONSLP0),
90 SAVE_ITEM(S3C64XX_MEM0CONSLP1),
91 SAVE_ITEM(S3C64XX_MEM1CONSLP),
92};
93
94void s3c_pm_configure_extint(void)
95{
96 __raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
97}
98
99void s3c_pm_restore_core(void)
100{
101 __raw_writel(0, S3C64XX_EINT_MASK);
102
103 s3c_pm_debug_smdkled(1 << 2, 0);
104
105 s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
106 s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
107}
108
109void s3c_pm_save_core(void)
110{
111 s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
112 s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
113}
114
115/* since both s3c6400 and s3c6410 share the same sleep pm calls, we
116 * put the per-cpu code in here until any new cpu comes along and changes
117 * this.
118 */
119
120#include <plat/regs-gpio.h>
121
122static void s3c64xx_cpu_suspend(void)
123{
124 unsigned long tmp;
125
126 /* set our standby method to sleep */
127
128 tmp = __raw_readl(S3C64XX_PWR_CFG);
129 tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
130 tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP;
131 __raw_writel(tmp, S3C64XX_PWR_CFG);
132
133 /* clear any old wakeup */
134
135 __raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT),
136 S3C64XX_WAKEUP_STAT);
137
138 /* set the LED state to 0110 over sleep */
139 s3c_pm_debug_smdkled(3 << 1, 0xf);
140
141 /* issue the standby signal into the pm unit. Note, we
142 * issue a write-buffer drain just in case */
143
144 tmp = 0;
145
146 asm("b 1f\n\t"
147 ".align 5\n\t"
148 "1:\n\t"
149 "mcr p15, 0, %0, c7, c10, 5\n\t"
150 "mcr p15, 0, %0, c7, c10, 4\n\t"
151 "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
152
153 /* we should never get past here */
154
155 panic("sleep resumed to originator?");
156}
157
158static void s3c64xx_pm_prepare(void)
159{
160 /* store address of resume. */
161 __raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
162
163 /* ensure previous wakeup state is cleared before sleeping */
164 __raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);
165}
166
167static int s3c64xx_pm_init(void)
168{
169 pm_cpu_prep = s3c64xx_pm_prepare;
170 pm_cpu_sleep = s3c64xx_cpu_suspend;
171 pm_uart_udivslot = 1;
172 return 0;
173}
174
175arch_initcall(s3c64xx_pm_init);