Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* linux/arch/arm/mach-s3c2410/pm.c |
| 2 | * |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 3 | * Copyright (c) 2006 Simtec Electronics |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 6 | * S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/init.h> |
| 24 | #include <linux/suspend.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/time.h> |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 27 | #include <linux/device.h> |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 28 | #include <linux/syscore_ops.h> |
Ben Dooks | ec976d6 | 2009-05-13 22:52:24 +0100 | [diff] [blame] | 29 | #include <linux/gpio.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 30 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 32 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 34 | #include <asm/mach-types.h> |
| 35 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 36 | #include <mach/regs-gpio.h> |
| 37 | #include <mach/h1940.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 39 | #include <plat/cpu.h> |
| 40 | #include <plat/pm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 42 | static void s3c2410_pm_prepare(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | { |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 44 | /* ensure at least GSTATUS3 has the resume address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Ben Dooks | ef30e14 | 2008-12-12 00:24:19 +0000 | [diff] [blame] | 46 | __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Ben Dooks | 6419711 | 2008-12-12 00:24:06 +0000 | [diff] [blame] | 48 | S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3)); |
| 49 | S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 51 | if (machine_is_h1940()) { |
| 52 | void *base = phys_to_virt(H1940_SUSPEND_CHECK); |
| 53 | unsigned long ptr; |
| 54 | unsigned long calc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 56 | /* generate check for the bootloader to check on resume */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 58 | for (ptr = 0; ptr < 0x40000; ptr += 0x400) |
| 59 | calc += __raw_readl(base+ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 61 | __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | } |
| 63 | |
Vasily Khoruzhick | 0741b7d | 2010-05-11 09:55:10 +0300 | [diff] [blame] | 64 | /* RX3715 and RX1950 use similar to H1940 code and the |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 65 | * same offsets for resume and checksum pointers */ |
| 66 | |
Vasily Khoruzhick | 0741b7d | 2010-05-11 09:55:10 +0300 | [diff] [blame] | 67 | if (machine_is_rx3715() || machine_is_rx1950()) { |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 68 | void *base = phys_to_virt(H1940_SUSPEND_CHECK); |
| 69 | unsigned long ptr; |
| 70 | unsigned long calc = 0; |
| 71 | |
| 72 | /* generate check for the bootloader to check on resume */ |
| 73 | |
| 74 | for (ptr = 0; ptr < 0x40000; ptr += 0x4) |
| 75 | calc += __raw_readl(base+ptr); |
| 76 | |
| 77 | __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM)); |
| 78 | } |
| 79 | |
| 80 | if ( machine_is_aml_m5900() ) |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 81 | s3c2410_gpio_setpin(S3C2410_GPF(2), 1); |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 82 | |
Vasily Khoruzhick | 192ff91 | 2010-05-11 09:55:11 +0300 | [diff] [blame] | 83 | if (machine_is_rx1950()) { |
| 84 | /* According to S3C2442 user's manual, page 7-17, |
| 85 | * when the system is operating in NAND boot mode, |
| 86 | * the hardware pin configuration - EINT[23:21] – |
| 87 | * must be set as input for starting up after |
| 88 | * wakeup from sleep mode |
| 89 | */ |
| 90 | s3c_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT); |
| 91 | s3c_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT); |
| 92 | s3c_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT); |
| 93 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 96 | static void s3c2410_pm_resume(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 98 | unsigned long tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 100 | /* unset the return-from-sleep flag, to ensure reset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 102 | tmp = __raw_readl(S3C2410_GSTATUS2); |
| 103 | tmp &= S3C2410_GSTATUS2_OFFRESET; |
| 104 | __raw_writel(tmp, S3C2410_GSTATUS2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 106 | if ( machine_is_aml_m5900() ) |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 107 | s3c2410_gpio_setpin(S3C2410_GPF(2), 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | } |
| 109 | |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 110 | struct syscore_ops s3c2410_pm_syscore_ops = { |
| 111 | .resume = s3c2410_pm_resume, |
| 112 | }; |
| 113 | |
Heiko Stuebner | 04511a6 | 2012-01-27 15:35:25 +0900 | [diff] [blame^] | 114 | static int s3c2410_pm_add(struct device *dev, struct subsys_interface *sif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 116 | pm_cpu_prep = s3c2410_pm_prepare; |
| 117 | pm_cpu_sleep = s3c2410_cpu_suspend; |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | return 0; |
| 120 | } |
| 121 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 122 | #if defined(CONFIG_CPU_S3C2410) |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 123 | static struct subsys_interface s3c2410_pm_interface = { |
| 124 | .name = "s3c2410_pm", |
| 125 | .subsys = &s3c2410_subsys, |
| 126 | .add_dev = s3c2410_pm_add, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | }; |
| 128 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 129 | /* register ourselves */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 131 | static int __init s3c2410_pm_drvinit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 133 | return subsys_interface_register(&s3c2410_pm_interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 135 | |
| 136 | arch_initcall(s3c2410_pm_drvinit); |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 137 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 138 | static struct subsys_interface s3c2410a_pm_interface = { |
| 139 | .name = "s3c2410a_pm", |
Kukjin Kim | ea04018 | 2012-01-06 16:08:09 +0900 | [diff] [blame] | 140 | .subsys = &s3c2410a_subsys, |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 141 | .add_dev = s3c2410_pm_add, |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 142 | }; |
| 143 | |
| 144 | static int __init s3c2410a_pm_drvinit(void) |
| 145 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 146 | return subsys_interface_register(&s3c2410a_pm_interface); |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | arch_initcall(s3c2410a_pm_drvinit); |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 150 | #endif |
| 151 | |
| 152 | #if defined(CONFIG_CPU_S3C2440) |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 153 | static struct subsys_interface s3c2440_pm_interface = { |
| 154 | .name = "s3c2440_pm", |
| 155 | .subsys = &s3c2440_subsys, |
| 156 | .add_dev = s3c2410_pm_add, |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 157 | }; |
| 158 | |
| 159 | static int __init s3c2440_pm_drvinit(void) |
| 160 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 161 | return subsys_interface_register(&s3c2440_pm_interface); |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | arch_initcall(s3c2440_pm_drvinit); |
| 165 | #endif |
| 166 | |
| 167 | #if defined(CONFIG_CPU_S3C2442) |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 168 | static struct subsys_interface s3c2442_pm_interface = { |
| 169 | .name = "s3c2442_pm", |
| 170 | .subsys = &s3c2442_subsys, |
| 171 | .add_dev = s3c2410_pm_add, |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 172 | }; |
| 173 | |
| 174 | static int __init s3c2442_pm_drvinit(void) |
| 175 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 176 | return subsys_interface_register(&s3c2442_pm_interface); |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | arch_initcall(s3c2442_pm_drvinit); |
| 180 | #endif |