Merge branch 'reg-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg...
[linux-2.6] / arch / sh / boards / mach-landisk / psw.c
1 /*
2  * arch/sh/boards/landisk/psw.c
3  *
4  * push switch support for LANDISK and USL-5P
5  *
6  * Copyright (C) 2006-2007  Paul Mundt
7  * Copyright (C) 2007  kogiidena
8  *
9  * This file is subject to the terms and conditions of the GNU General Public
10  * License.  See the file "COPYING" in the main directory of this archive
11  * for more details.
12  */
13 #include <linux/io.h>
14 #include <linux/init.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <mach-landisk/mach/iodata_landisk.h>
18 #include <asm/push-switch.h>
19
20 static irqreturn_t psw_irq_handler(int irq, void *arg)
21 {
22         struct platform_device *pdev = arg;
23         struct push_switch *psw = platform_get_drvdata(pdev);
24         struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
25         unsigned int sw_value;
26         int ret = 0;
27
28         sw_value = (0x0ff & (~ctrl_inb(PA_STATUS)));
29
30         /* Nothing to do if there's no state change */
31         if (psw->state) {
32                 ret = 1;
33                 goto out;
34         }
35
36         /* Figure out who raised it */
37         if (sw_value & (1 << psw_info->bit)) {
38                 psw->state = 1;
39                 mod_timer(&psw->debounce, jiffies + 50);
40                 ret = 1;
41         }
42
43 out:
44         /* Clear the switch IRQs */
45         ctrl_outb(0x00, PA_PWRINT_CLR);
46
47         return IRQ_RETVAL(ret);
48 }
49
50 static struct resource psw_power_resources[] = {
51         [0] = {
52                 .start = IRQ_POWER,
53                 .flags = IORESOURCE_IRQ,
54        },
55 };
56
57 static struct resource psw_usl5p_resources[] = {
58         [0] = {
59                 .start = IRQ_BUTTON,
60                 .flags = IORESOURCE_IRQ,
61         },
62 };
63
64 static struct push_switch_platform_info psw_power_platform_data = {
65         .name           = "psw_power",
66         .bit            = 4,
67         .irq_flags      = IRQF_SHARED,
68         .irq_handler    = psw_irq_handler,
69 };
70
71 static struct push_switch_platform_info psw1_platform_data = {
72         .name           = "psw1",
73         .bit            = 0,
74         .irq_flags      = IRQF_SHARED,
75         .irq_handler    = psw_irq_handler,
76 };
77
78 static struct push_switch_platform_info psw2_platform_data = {
79         .name           = "psw2",
80         .bit            = 2,
81         .irq_flags      = IRQF_SHARED,
82         .irq_handler    = psw_irq_handler,
83 };
84
85 static struct push_switch_platform_info psw3_platform_data = {
86         .name           = "psw3",
87         .bit            = 1,
88         .irq_flags      = IRQF_SHARED,
89         .irq_handler    = psw_irq_handler,
90 };
91
92 static struct platform_device psw_power_switch_device = {
93         .name           = "push-switch",
94         .id             = 0,
95         .num_resources  = ARRAY_SIZE(psw_power_resources),
96         .resource       = psw_power_resources,
97         .dev            = {
98                 .platform_data = &psw_power_platform_data,
99         },
100 };
101
102 static struct platform_device psw1_switch_device = {
103         .name           = "push-switch",
104         .id             = 1,
105         .num_resources  = ARRAY_SIZE(psw_usl5p_resources),
106         .resource       = psw_usl5p_resources,
107         .dev            = {
108                 .platform_data = &psw1_platform_data,
109         },
110 };
111
112 static struct platform_device psw2_switch_device = {
113         .name           = "push-switch",
114         .id             = 2,
115         .num_resources  = ARRAY_SIZE(psw_usl5p_resources),
116         .resource       = psw_usl5p_resources,
117         .dev            = {
118                 .platform_data = &psw2_platform_data,
119         },
120 };
121
122 static struct platform_device psw3_switch_device = {
123         .name           = "push-switch",
124         .id             = 3,
125         .num_resources  = ARRAY_SIZE(psw_usl5p_resources),
126         .resource       = psw_usl5p_resources,
127         .dev = {
128                 .platform_data = &psw3_platform_data,
129         },
130 };
131
132 static struct platform_device *psw_devices[] = {
133         &psw_power_switch_device,
134         &psw1_switch_device,
135         &psw2_switch_device,
136         &psw3_switch_device,
137 };
138
139 static int __init psw_init(void)
140 {
141         return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
142 }
143 module_init(psw_init);