1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/sh/boards/landisk/psw.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * push switch support for LANDISK and USL-5P
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (C) 2006-2007 Paul Mundt
8*4882a593Smuzhiyun * Copyright (C) 2007 kogiidena
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun #include <linux/io.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/interrupt.h>
13*4882a593Smuzhiyun #include <linux/platform_device.h>
14*4882a593Smuzhiyun #include <mach-landisk/mach/iodata_landisk.h>
15*4882a593Smuzhiyun #include <asm/push-switch.h>
16*4882a593Smuzhiyun
psw_irq_handler(int irq,void * arg)17*4882a593Smuzhiyun static irqreturn_t psw_irq_handler(int irq, void *arg)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun struct platform_device *pdev = arg;
20*4882a593Smuzhiyun struct push_switch *psw = platform_get_drvdata(pdev);
21*4882a593Smuzhiyun struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
22*4882a593Smuzhiyun unsigned int sw_value;
23*4882a593Smuzhiyun int ret = 0;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun sw_value = (0x0ff & (~__raw_readb(PA_STATUS)));
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun /* Nothing to do if there's no state change */
28*4882a593Smuzhiyun if (psw->state) {
29*4882a593Smuzhiyun ret = 1;
30*4882a593Smuzhiyun goto out;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun /* Figure out who raised it */
34*4882a593Smuzhiyun if (sw_value & (1 << psw_info->bit)) {
35*4882a593Smuzhiyun psw->state = 1;
36*4882a593Smuzhiyun mod_timer(&psw->debounce, jiffies + 50);
37*4882a593Smuzhiyun ret = 1;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun out:
41*4882a593Smuzhiyun /* Clear the switch IRQs */
42*4882a593Smuzhiyun __raw_writeb(0x00, PA_PWRINT_CLR);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun return IRQ_RETVAL(ret);
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun static struct resource psw_power_resources[] = {
48*4882a593Smuzhiyun [0] = {
49*4882a593Smuzhiyun .start = IRQ_POWER,
50*4882a593Smuzhiyun .flags = IORESOURCE_IRQ,
51*4882a593Smuzhiyun },
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static struct resource psw_usl5p_resources[] = {
55*4882a593Smuzhiyun [0] = {
56*4882a593Smuzhiyun .start = IRQ_BUTTON,
57*4882a593Smuzhiyun .flags = IORESOURCE_IRQ,
58*4882a593Smuzhiyun },
59*4882a593Smuzhiyun };
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun static struct push_switch_platform_info psw_power_platform_data = {
62*4882a593Smuzhiyun .name = "psw_power",
63*4882a593Smuzhiyun .bit = 4,
64*4882a593Smuzhiyun .irq_flags = IRQF_SHARED,
65*4882a593Smuzhiyun .irq_handler = psw_irq_handler,
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun static struct push_switch_platform_info psw1_platform_data = {
69*4882a593Smuzhiyun .name = "psw1",
70*4882a593Smuzhiyun .bit = 0,
71*4882a593Smuzhiyun .irq_flags = IRQF_SHARED,
72*4882a593Smuzhiyun .irq_handler = psw_irq_handler,
73*4882a593Smuzhiyun };
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun static struct push_switch_platform_info psw2_platform_data = {
76*4882a593Smuzhiyun .name = "psw2",
77*4882a593Smuzhiyun .bit = 2,
78*4882a593Smuzhiyun .irq_flags = IRQF_SHARED,
79*4882a593Smuzhiyun .irq_handler = psw_irq_handler,
80*4882a593Smuzhiyun };
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun static struct push_switch_platform_info psw3_platform_data = {
83*4882a593Smuzhiyun .name = "psw3",
84*4882a593Smuzhiyun .bit = 1,
85*4882a593Smuzhiyun .irq_flags = IRQF_SHARED,
86*4882a593Smuzhiyun .irq_handler = psw_irq_handler,
87*4882a593Smuzhiyun };
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static struct platform_device psw_power_switch_device = {
90*4882a593Smuzhiyun .name = "push-switch",
91*4882a593Smuzhiyun .id = 0,
92*4882a593Smuzhiyun .num_resources = ARRAY_SIZE(psw_power_resources),
93*4882a593Smuzhiyun .resource = psw_power_resources,
94*4882a593Smuzhiyun .dev = {
95*4882a593Smuzhiyun .platform_data = &psw_power_platform_data,
96*4882a593Smuzhiyun },
97*4882a593Smuzhiyun };
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun static struct platform_device psw1_switch_device = {
100*4882a593Smuzhiyun .name = "push-switch",
101*4882a593Smuzhiyun .id = 1,
102*4882a593Smuzhiyun .num_resources = ARRAY_SIZE(psw_usl5p_resources),
103*4882a593Smuzhiyun .resource = psw_usl5p_resources,
104*4882a593Smuzhiyun .dev = {
105*4882a593Smuzhiyun .platform_data = &psw1_platform_data,
106*4882a593Smuzhiyun },
107*4882a593Smuzhiyun };
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun static struct platform_device psw2_switch_device = {
110*4882a593Smuzhiyun .name = "push-switch",
111*4882a593Smuzhiyun .id = 2,
112*4882a593Smuzhiyun .num_resources = ARRAY_SIZE(psw_usl5p_resources),
113*4882a593Smuzhiyun .resource = psw_usl5p_resources,
114*4882a593Smuzhiyun .dev = {
115*4882a593Smuzhiyun .platform_data = &psw2_platform_data,
116*4882a593Smuzhiyun },
117*4882a593Smuzhiyun };
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun static struct platform_device psw3_switch_device = {
120*4882a593Smuzhiyun .name = "push-switch",
121*4882a593Smuzhiyun .id = 3,
122*4882a593Smuzhiyun .num_resources = ARRAY_SIZE(psw_usl5p_resources),
123*4882a593Smuzhiyun .resource = psw_usl5p_resources,
124*4882a593Smuzhiyun .dev = {
125*4882a593Smuzhiyun .platform_data = &psw3_platform_data,
126*4882a593Smuzhiyun },
127*4882a593Smuzhiyun };
128*4882a593Smuzhiyun
129*4882a593Smuzhiyun static struct platform_device *psw_devices[] = {
130*4882a593Smuzhiyun &psw_power_switch_device,
131*4882a593Smuzhiyun &psw1_switch_device,
132*4882a593Smuzhiyun &psw2_switch_device,
133*4882a593Smuzhiyun &psw3_switch_device,
134*4882a593Smuzhiyun };
135*4882a593Smuzhiyun
psw_init(void)136*4882a593Smuzhiyun static int __init psw_init(void)
137*4882a593Smuzhiyun {
138*4882a593Smuzhiyun return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
139*4882a593Smuzhiyun }
140*4882a593Smuzhiyun device_initcall(psw_init);
141