1aaf9128aSKuninori Morimoto // SPDX-License-Identifier: GPL-2.0
2da2014a2SPaul Mundt /*
3da2014a2SPaul Mundt * arch/sh/boards/landisk/psw.c
4da2014a2SPaul Mundt *
5da2014a2SPaul Mundt * push switch support for LANDISK and USL-5P
6da2014a2SPaul Mundt *
7da2014a2SPaul Mundt * Copyright (C) 2006-2007 Paul Mundt
8da2014a2SPaul Mundt * Copyright (C) 2007 kogiidena
9da2014a2SPaul Mundt */
10da2014a2SPaul Mundt #include <linux/io.h>
11da2014a2SPaul Mundt #include <linux/init.h>
12da2014a2SPaul Mundt #include <linux/interrupt.h>
13da2014a2SPaul Mundt #include <linux/platform_device.h>
140764bff4SPaul Mundt #include <mach-landisk/mach/iodata_landisk.h>
15da2014a2SPaul Mundt #include <asm/push-switch.h>
16da2014a2SPaul Mundt
psw_irq_handler(int irq,void * arg)17da2014a2SPaul Mundt static irqreturn_t psw_irq_handler(int irq, void *arg)
18da2014a2SPaul Mundt {
19da2014a2SPaul Mundt struct platform_device *pdev = arg;
20da2014a2SPaul Mundt struct push_switch *psw = platform_get_drvdata(pdev);
21da2014a2SPaul Mundt struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
22da2014a2SPaul Mundt unsigned int sw_value;
23da2014a2SPaul Mundt int ret = 0;
24da2014a2SPaul Mundt
259d56dd3bSPaul Mundt sw_value = (0x0ff & (~__raw_readb(PA_STATUS)));
26da2014a2SPaul Mundt
27da2014a2SPaul Mundt /* Nothing to do if there's no state change */
28da2014a2SPaul Mundt if (psw->state) {
29da2014a2SPaul Mundt ret = 1;
30da2014a2SPaul Mundt goto out;
31da2014a2SPaul Mundt }
32da2014a2SPaul Mundt
33da2014a2SPaul Mundt /* Figure out who raised it */
34da2014a2SPaul Mundt if (sw_value & (1 << psw_info->bit)) {
35da2014a2SPaul Mundt psw->state = 1;
36da2014a2SPaul Mundt mod_timer(&psw->debounce, jiffies + 50);
37da2014a2SPaul Mundt ret = 1;
38da2014a2SPaul Mundt }
39da2014a2SPaul Mundt
40da2014a2SPaul Mundt out:
41da2014a2SPaul Mundt /* Clear the switch IRQs */
429d56dd3bSPaul Mundt __raw_writeb(0x00, PA_PWRINT_CLR);
43da2014a2SPaul Mundt
44da2014a2SPaul Mundt return IRQ_RETVAL(ret);
45da2014a2SPaul Mundt }
46da2014a2SPaul Mundt
47da2014a2SPaul Mundt static struct resource psw_power_resources[] = {
48da2014a2SPaul Mundt [0] = {
49da2014a2SPaul Mundt .start = IRQ_POWER,
50da2014a2SPaul Mundt .flags = IORESOURCE_IRQ,
51da2014a2SPaul Mundt },
52da2014a2SPaul Mundt };
53da2014a2SPaul Mundt
54da2014a2SPaul Mundt static struct resource psw_usl5p_resources[] = {
55da2014a2SPaul Mundt [0] = {
56da2014a2SPaul Mundt .start = IRQ_BUTTON,
57da2014a2SPaul Mundt .flags = IORESOURCE_IRQ,
58da2014a2SPaul Mundt },
59da2014a2SPaul Mundt };
60da2014a2SPaul Mundt
61da2014a2SPaul Mundt static struct push_switch_platform_info psw_power_platform_data = {
62da2014a2SPaul Mundt .name = "psw_power",
63da2014a2SPaul Mundt .bit = 4,
64da2014a2SPaul Mundt .irq_flags = IRQF_SHARED,
65da2014a2SPaul Mundt .irq_handler = psw_irq_handler,
66da2014a2SPaul Mundt };
67da2014a2SPaul Mundt
68da2014a2SPaul Mundt static struct push_switch_platform_info psw1_platform_data = {
69da2014a2SPaul Mundt .name = "psw1",
70da2014a2SPaul Mundt .bit = 0,
71da2014a2SPaul Mundt .irq_flags = IRQF_SHARED,
72da2014a2SPaul Mundt .irq_handler = psw_irq_handler,
73da2014a2SPaul Mundt };
74da2014a2SPaul Mundt
75da2014a2SPaul Mundt static struct push_switch_platform_info psw2_platform_data = {
76da2014a2SPaul Mundt .name = "psw2",
77da2014a2SPaul Mundt .bit = 2,
78da2014a2SPaul Mundt .irq_flags = IRQF_SHARED,
79da2014a2SPaul Mundt .irq_handler = psw_irq_handler,
80da2014a2SPaul Mundt };
81da2014a2SPaul Mundt
82da2014a2SPaul Mundt static struct push_switch_platform_info psw3_platform_data = {
83da2014a2SPaul Mundt .name = "psw3",
84da2014a2SPaul Mundt .bit = 1,
85da2014a2SPaul Mundt .irq_flags = IRQF_SHARED,
86da2014a2SPaul Mundt .irq_handler = psw_irq_handler,
87da2014a2SPaul Mundt };
88da2014a2SPaul Mundt
89da2014a2SPaul Mundt static struct platform_device psw_power_switch_device = {
90da2014a2SPaul Mundt .name = "push-switch",
91da2014a2SPaul Mundt .id = 0,
92da2014a2SPaul Mundt .num_resources = ARRAY_SIZE(psw_power_resources),
93da2014a2SPaul Mundt .resource = psw_power_resources,
94da2014a2SPaul Mundt .dev = {
95da2014a2SPaul Mundt .platform_data = &psw_power_platform_data,
96da2014a2SPaul Mundt },
97da2014a2SPaul Mundt };
98da2014a2SPaul Mundt
99da2014a2SPaul Mundt static struct platform_device psw1_switch_device = {
100da2014a2SPaul Mundt .name = "push-switch",
101da2014a2SPaul Mundt .id = 1,
102da2014a2SPaul Mundt .num_resources = ARRAY_SIZE(psw_usl5p_resources),
103da2014a2SPaul Mundt .resource = psw_usl5p_resources,
104da2014a2SPaul Mundt .dev = {
105da2014a2SPaul Mundt .platform_data = &psw1_platform_data,
106da2014a2SPaul Mundt },
107da2014a2SPaul Mundt };
108da2014a2SPaul Mundt
109da2014a2SPaul Mundt static struct platform_device psw2_switch_device = {
110da2014a2SPaul Mundt .name = "push-switch",
111da2014a2SPaul Mundt .id = 2,
112da2014a2SPaul Mundt .num_resources = ARRAY_SIZE(psw_usl5p_resources),
113da2014a2SPaul Mundt .resource = psw_usl5p_resources,
114da2014a2SPaul Mundt .dev = {
115da2014a2SPaul Mundt .platform_data = &psw2_platform_data,
116da2014a2SPaul Mundt },
117da2014a2SPaul Mundt };
118da2014a2SPaul Mundt
119da2014a2SPaul Mundt static struct platform_device psw3_switch_device = {
120da2014a2SPaul Mundt .name = "push-switch",
121da2014a2SPaul Mundt .id = 3,
122da2014a2SPaul Mundt .num_resources = ARRAY_SIZE(psw_usl5p_resources),
123da2014a2SPaul Mundt .resource = psw_usl5p_resources,
124da2014a2SPaul Mundt .dev = {
125da2014a2SPaul Mundt .platform_data = &psw3_platform_data,
126da2014a2SPaul Mundt },
127da2014a2SPaul Mundt };
128da2014a2SPaul Mundt
129da2014a2SPaul Mundt static struct platform_device *psw_devices[] = {
130da2014a2SPaul Mundt &psw_power_switch_device,
131da2014a2SPaul Mundt &psw1_switch_device,
132da2014a2SPaul Mundt &psw2_switch_device,
133da2014a2SPaul Mundt &psw3_switch_device,
134da2014a2SPaul Mundt };
135da2014a2SPaul Mundt
psw_init(void)136da2014a2SPaul Mundt static int __init psw_init(void)
137da2014a2SPaul Mundt {
138da2014a2SPaul Mundt return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
139da2014a2SPaul Mundt }
140b205118bSPaul Gortmaker device_initcall(psw_init);
141