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1/* arch/arm/plat-s3c64xx/irq-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 - Interrupt handling Power Management
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/kernel.h>
16#include <linux/syscore_ops.h>
17#include <linux/interrupt.h>
18#include <linux/serial_core.h>
19#include <linux/irq.h>
20#include <linux/io.h>
21
22#include <mach/map.h>
23
24#include <plat/regs-serial.h>
25#include <plat/regs-timer.h>
26#include <mach/regs-gpio.h>
27#include <plat/cpu.h>
28#include <plat/pm.h>
29
30/* We handled all the IRQ types in this code, to save having to make several
31 * small files to handle each different type separately. Having the EINT_GRP
32 * code here shouldn't be as much bloat as the IRQ table space needed when
33 * they are enabled. The added benefit is we ensure that these registers are
34 * in the same state as we suspended.
35 */
36
37static struct sleep_save irq_save[] = {
38 SAVE_ITEM(S3C64XX_PRIORITY),
39 SAVE_ITEM(S3C64XX_EINT0CON0),
40 SAVE_ITEM(S3C64XX_EINT0CON1),
41 SAVE_ITEM(S3C64XX_EINT0FLTCON0),
42 SAVE_ITEM(S3C64XX_EINT0FLTCON1),
43 SAVE_ITEM(S3C64XX_EINT0FLTCON2),
44 SAVE_ITEM(S3C64XX_EINT0FLTCON3),
45 SAVE_ITEM(S3C64XX_EINT0MASK),
46 SAVE_ITEM(S3C64XX_TINT_CSTAT),
47};
48
49static struct irq_grp_save {
50 u32 fltcon;
51 u32 con;
52 u32 mask;
53} eint_grp_save[5];
54
55static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
56
57static int s3c64xx_irq_pm_suspend(void)
58{
59 struct irq_grp_save *grp = eint_grp_save;
60 int i;
61
62 S3C_PMDBG("%s: suspending IRQs\n", __func__);
63
64 s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
65
66 for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
67 irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
68
69 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
70 grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
71 grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
72 grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
73 }
74
75 return 0;
76}
77
78static void s3c64xx_irq_pm_resume(void)
79{
80 struct irq_grp_save *grp = eint_grp_save;
81 int i;
82
83 S3C_PMDBG("%s: resuming IRQs\n", __func__);
84
85 s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
86
87 for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
88 __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
89
90 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
91 __raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
92 __raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
93 __raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
94 }
95
96 S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
97}
98
99static struct syscore_ops s3c64xx_irq_syscore_ops = {
100 .suspend = s3c64xx_irq_pm_suspend,
101 .resume = s3c64xx_irq_pm_resume,
102};
103
104static __init int s3c64xx_syscore_init(void)
105{
106 register_syscore_ops(&s3c64xx_irq_syscore_ops);
107
108 return 0;
109}
110
111core_initcall(s3c64xx_syscore_init);
1/* arch/arm/plat-s3c64xx/irq-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 - Interrupt handling Power Management
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/*
16 * NOTE: Code in this file is not used when booting with Device Tree support.
17 */
18
19#include <linux/kernel.h>
20#include <linux/syscore_ops.h>
21#include <linux/interrupt.h>
22#include <linux/serial_core.h>
23#include <linux/serial_s3c.h>
24#include <linux/irq.h>
25#include <linux/io.h>
26#include <linux/of.h>
27
28#include <mach/map.h>
29
30#include <mach/regs-gpio.h>
31#include <plat/cpu.h>
32#include <plat/pm.h>
33
34/* We handled all the IRQ types in this code, to save having to make several
35 * small files to handle each different type separately. Having the EINT_GRP
36 * code here shouldn't be as much bloat as the IRQ table space needed when
37 * they are enabled. The added benefit is we ensure that these registers are
38 * in the same state as we suspended.
39 */
40
41static struct sleep_save irq_save[] = {
42 SAVE_ITEM(S3C64XX_PRIORITY),
43 SAVE_ITEM(S3C64XX_EINT0CON0),
44 SAVE_ITEM(S3C64XX_EINT0CON1),
45 SAVE_ITEM(S3C64XX_EINT0FLTCON0),
46 SAVE_ITEM(S3C64XX_EINT0FLTCON1),
47 SAVE_ITEM(S3C64XX_EINT0FLTCON2),
48 SAVE_ITEM(S3C64XX_EINT0FLTCON3),
49 SAVE_ITEM(S3C64XX_EINT0MASK),
50};
51
52static struct irq_grp_save {
53 u32 fltcon;
54 u32 con;
55 u32 mask;
56} eint_grp_save[5];
57
58#ifndef CONFIG_SERIAL_SAMSUNG_UARTS
59#define SERIAL_SAMSUNG_UARTS 0
60#else
61#define SERIAL_SAMSUNG_UARTS CONFIG_SERIAL_SAMSUNG_UARTS
62#endif
63
64static u32 irq_uart_mask[SERIAL_SAMSUNG_UARTS];
65
66static int s3c64xx_irq_pm_suspend(void)
67{
68 struct irq_grp_save *grp = eint_grp_save;
69 int i;
70
71 S3C_PMDBG("%s: suspending IRQs\n", __func__);
72
73 s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
74
75 for (i = 0; i < SERIAL_SAMSUNG_UARTS; i++)
76 irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
77
78 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
79 grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
80 grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
81 grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
82 }
83
84 return 0;
85}
86
87static void s3c64xx_irq_pm_resume(void)
88{
89 struct irq_grp_save *grp = eint_grp_save;
90 int i;
91
92 S3C_PMDBG("%s: resuming IRQs\n", __func__);
93
94 s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
95
96 for (i = 0; i < SERIAL_SAMSUNG_UARTS; i++)
97 __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
98
99 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
100 __raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
101 __raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
102 __raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
103 }
104
105 S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
106}
107
108static struct syscore_ops s3c64xx_irq_syscore_ops = {
109 .suspend = s3c64xx_irq_pm_suspend,
110 .resume = s3c64xx_irq_pm_resume,
111};
112
113static __init int s3c64xx_syscore_init(void)
114{
115 /* Appropriate drivers (pinctrl, uart) handle this when using DT. */
116 if (of_have_populated_dt() || !soc_is_s3c64xx())
117 return 0;
118
119 register_syscore_ops(&s3c64xx_irq_syscore_ops);
120
121 return 0;
122}
123
124core_initcall(s3c64xx_syscore_init);