projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 6b6844dd AK |
1 | /* linux/arch/arm/mach-s5p64x0/irq-pm.c |
| 2 | * | |
| 3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
| 4 | * http://www.samsung.com | |
| 5 | * | |
| 6 | * S5P64X0 - Interrupt handling Power Management | |
| 7 | * | |
| 8 | * Based on arch/arm/mach-s3c64xx/irq-pm.c by Ben Dooks | |
| 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/syscore_ops.h> | |
| 16 | #include <linux/serial_core.h> | |
| 17 | #include <linux/io.h> | |
| 18 | ||
| 19 | #include <plat/regs-serial.h> | |
| 20 | #include <plat/pm.h> | |
| 21 | ||
| 22 | #include <mach/regs-gpio.h> | |
| 23 | ||
| 24 | static struct sleep_save irq_save[] = { | |
| 25 | SAVE_ITEM(S5P64X0_EINT0CON0), | |
| 26 | SAVE_ITEM(S5P64X0_EINT0FLTCON0), | |
| 27 | SAVE_ITEM(S5P64X0_EINT0FLTCON1), | |
| 28 | SAVE_ITEM(S5P64X0_EINT0MASK), | |
| 29 | }; | |
| 30 | ||
| 31 | static struct irq_grp_save { | |
| 32 | u32 con; | |
| 33 | u32 fltcon; | |
| 34 | u32 mask; | |
| 35 | } eint_grp_save[4]; | |
| 36 | ||
| 37 | static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS]; | |
| 38 | ||
| 39 | static int s5p64x0_irq_pm_suspend(void) | |
| 40 | { | |
| 41 | struct irq_grp_save *grp = eint_grp_save; | |
| 42 | int i; | |
| 43 | ||
| 44 | S3C_PMDBG("%s: suspending IRQs\n", __func__); | |
| 45 | ||
| 46 | s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save)); | |
| 47 | ||
| 48 | for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) | |
| 49 | irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM); | |
| 50 | ||
| 51 | for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { | |
| 52 | grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4)); | |
| 53 | grp->mask = __raw_readl(S5P64X0_EINT12MASK + (i * 4)); | |
| 54 | grp->fltcon = __raw_readl(S5P64X0_EINT12FLTCON + (i * 4)); | |
| 55 | } | |
| 56 | ||
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | static void s5p64x0_irq_pm_resume(void) | |
| 61 | { | |
| 62 | struct irq_grp_save *grp = eint_grp_save; | |
| 63 | int i; | |
| 64 | ||
| 65 | S3C_PMDBG("%s: resuming IRQs\n", __func__); | |
| 66 | ||
| 67 | s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save)); | |
| 68 | ||
| 69 | for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) | |
| 70 | __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM); | |
| 71 | ||
| 72 | for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { | |
| 73 | __raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4)); | |
| 74 | __raw_writel(grp->mask, S5P64X0_EINT12MASK + (i * 4)); | |
| 75 | __raw_writel(grp->fltcon, S5P64X0_EINT12FLTCON + (i * 4)); | |
| 76 | } | |
| 77 | ||
| 78 | S3C_PMDBG("%s: IRQ configuration restored\n", __func__); | |
| 79 | } | |
| 80 | ||
| 81 | static struct syscore_ops s5p64x0_irq_syscore_ops = { | |
| 82 | .suspend = s5p64x0_irq_pm_suspend, | |
| 83 | .resume = s5p64x0_irq_pm_resume, | |
| 84 | }; | |
| 85 | ||
| 86 | static int __init s5p64x0_syscore_init(void) | |
| 87 | { | |
| 88 | register_syscore_ops(&s5p64x0_irq_syscore_ops); | |
| 89 | ||
| 90 | return 0; | |
| 91 | } | |
| 92 | core_initcall(s5p64x0_syscore_init); |