| Paul Mundt | 9daa0c2 | 2006-11-24 11:24:39 +0900 | [diff] [blame] | 1 | /* |
| 2 | * arch/sh/boards/renesas/r7780rp/psw.c |
| 3 | * |
| 4 | * push switch support for RDBRP-1/RDBREVRP-1 debug boards. |
| 5 | * |
| 6 | * Copyright (C) 2006 Paul Mundt |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file "COPYING" in the main directory of this archive |
| 10 | * for more details. |
| 11 | */ |
| 12 | #include <linux/io.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/platform_device.h> |
| Paul Mundt | 7639a45 | 2008-10-20 13:02:48 +0900 | [diff] [blame] | 16 | #include <mach/highlander.h> |
| Paul Mundt | 9daa0c2 | 2006-11-24 11:24:39 +0900 | [diff] [blame] | 17 | #include <asm/push-switch.h> |
| 18 | |
| 19 | static irqreturn_t psw_irq_handler(int irq, void *arg) |
| 20 | { |
| 21 | struct platform_device *pdev = arg; |
| 22 | struct push_switch *psw = platform_get_drvdata(pdev); |
| 23 | struct push_switch_platform_info *psw_info = pdev->dev.platform_data; |
| 24 | unsigned int l, mask; |
| 25 | int ret = 0; |
| 26 | |
| 27 | l = ctrl_inw(PA_DBSW); |
| 28 | |
| 29 | /* Nothing to do if there's no state change */ |
| 30 | if (psw->state) { |
| 31 | ret = 1; |
| 32 | goto out; |
| 33 | } |
| 34 | |
| 35 | mask = l & 0x70; |
| 36 | /* Figure out who raised it */ |
| 37 | if (mask & (1 << psw_info->bit)) { |
| 38 | psw->state = !!(mask & (1 << psw_info->bit)); |
| 39 | if (psw->state) /* debounce */ |
| 40 | mod_timer(&psw->debounce, jiffies + 50); |
| 41 | |
| 42 | ret = 1; |
| 43 | } |
| 44 | |
| 45 | out: |
| 46 | /* Clear the switch IRQs */ |
| 47 | l |= (0x7 << 12); |
| 48 | ctrl_outw(l, PA_DBSW); |
| 49 | |
| 50 | return IRQ_RETVAL(ret); |
| 51 | } |
| 52 | |
| 53 | static struct resource psw_resources[] = { |
| 54 | [0] = { |
| 55 | .start = IRQ_PSW, |
| 56 | .flags = IORESOURCE_IRQ, |
| 57 | }, |
| 58 | }; |
| 59 | |
| 60 | static struct push_switch_platform_info s2_platform_data = { |
| 61 | .name = "s2", |
| 62 | .bit = 6, |
| 63 | .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | |
| 64 | IRQF_SHARED, |
| 65 | .irq_handler = psw_irq_handler, |
| 66 | }; |
| 67 | |
| 68 | static struct platform_device s2_switch_device = { |
| 69 | .name = "push-switch", |
| 70 | .id = 0, |
| 71 | .num_resources = ARRAY_SIZE(psw_resources), |
| 72 | .resource = psw_resources, |
| 73 | .dev = { |
| 74 | .platform_data = &s2_platform_data, |
| 75 | }, |
| 76 | }; |
| 77 | |
| 78 | static struct push_switch_platform_info s3_platform_data = { |
| 79 | .name = "s3", |
| 80 | .bit = 5, |
| 81 | .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | |
| 82 | IRQF_SHARED, |
| 83 | .irq_handler = psw_irq_handler, |
| 84 | }; |
| 85 | |
| 86 | static struct platform_device s3_switch_device = { |
| 87 | .name = "push-switch", |
| 88 | .id = 1, |
| 89 | .num_resources = ARRAY_SIZE(psw_resources), |
| 90 | .resource = psw_resources, |
| 91 | .dev = { |
| 92 | .platform_data = &s3_platform_data, |
| 93 | }, |
| 94 | }; |
| 95 | |
| 96 | static struct push_switch_platform_info s4_platform_data = { |
| 97 | .name = "s4", |
| 98 | .bit = 4, |
| 99 | .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | |
| 100 | IRQF_SHARED, |
| 101 | .irq_handler = psw_irq_handler, |
| 102 | }; |
| 103 | |
| 104 | static struct platform_device s4_switch_device = { |
| 105 | .name = "push-switch", |
| 106 | .id = 2, |
| 107 | .num_resources = ARRAY_SIZE(psw_resources), |
| 108 | .resource = psw_resources, |
| 109 | .dev = { |
| 110 | .platform_data = &s4_platform_data, |
| 111 | }, |
| 112 | }; |
| 113 | |
| 114 | static struct platform_device *psw_devices[] = { |
| 115 | &s2_switch_device, &s3_switch_device, &s4_switch_device, |
| 116 | }; |
| 117 | |
| 118 | static int __init psw_init(void) |
| 119 | { |
| 120 | return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices)); |
| 121 | } |
| 122 | module_init(psw_init); |