diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-14 16:42:43 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-14 16:42:43 -0400 |
commit | 2cf4d4514d5b43c1f3b64bd0ec8b9853bde8f1dc (patch) | |
tree | e35a625496acc6ac852846d40b8851186b9d1ac4 /arch/arm/plat-s3c64xx/pm.c | |
parent | 44b7532b8b464f606053562400719c9c21276037 (diff) | |
parent | ce53895a5d24e0ee19fb92f56c17323fb4c9ab27 (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.c | 175 |
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 | |||
32 | void 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 | |||
54 | static 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 | |||
80 | static 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 | |||
94 | void s3c_pm_configure_extint(void) | ||
95 | { | ||
96 | __raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK); | ||
97 | } | ||
98 | |||
99 | void 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 | |||
109 | void 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 | |||
122 | static 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 | |||
158 | static 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 | |||
167 | static 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 | |||
175 | arch_initcall(s3c64xx_pm_init); | ||