| Balaji Rao | 1851b06 | 2009-01-09 01:50:58 +0100 | [diff] [blame] | 1 | /* NXP PCF50633 Input Driver |
| 2 | * |
| 3 | * (C) 2006-2008 by Openmoko, Inc. |
| 4 | * Author: Balaji Rao <balajirrao@openmoko.org> |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Broken down from monstrous PCF50633 driver mainly by |
| 8 | * Harald Welte, Andy Green and Werner Almesberger |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/device.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/input.h> |
| 23 | |
| 24 | #include <linux/mfd/pcf50633/core.h> |
| 25 | |
| 26 | #define PCF50633_OOCSTAT_ONKEY 0x01 |
| 27 | #define PCF50633_REG_OOCSTAT 0x12 |
| 28 | #define PCF50633_REG_OOCMODE 0x10 |
| 29 | |
| 30 | struct pcf50633_input { |
| 31 | struct pcf50633 *pcf; |
| 32 | struct input_dev *input_dev; |
| 33 | }; |
| 34 | |
| 35 | static void |
| 36 | pcf50633_input_irq(int irq, void *data) |
| 37 | { |
| 38 | struct pcf50633_input *input; |
| 39 | int onkey_released; |
| 40 | |
| 41 | input = data; |
| 42 | |
| 43 | /* We report only one event depending on the key press status */ |
| 44 | onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT) |
| 45 | & PCF50633_OOCSTAT_ONKEY; |
| 46 | |
| 47 | if (irq == PCF50633_IRQ_ONKEYF && !onkey_released) |
| 48 | input_report_key(input->input_dev, KEY_POWER, 1); |
| 49 | else if (irq == PCF50633_IRQ_ONKEYR && onkey_released) |
| 50 | input_report_key(input->input_dev, KEY_POWER, 0); |
| 51 | |
| 52 | input_sync(input->input_dev); |
| 53 | } |
| 54 | |
| 55 | static int __devinit pcf50633_input_probe(struct platform_device *pdev) |
| 56 | { |
| 57 | struct pcf50633_input *input; |
| 58 | struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data; |
| 59 | struct input_dev *input_dev; |
| 60 | int ret; |
| 61 | |
| 62 | |
| 63 | input = kzalloc(sizeof(*input), GFP_KERNEL); |
| 64 | if (!input) |
| 65 | return -ENOMEM; |
| 66 | |
| 67 | input_dev = input_allocate_device(); |
| 68 | if (!input_dev) { |
| 69 | kfree(input); |
| 70 | return -ENOMEM; |
| 71 | } |
| 72 | |
| 73 | platform_set_drvdata(pdev, input); |
| 74 | input->pcf = pdata->pcf; |
| 75 | input->input_dev = input_dev; |
| 76 | |
| 77 | input_dev->name = "PCF50633 PMU events"; |
| 78 | input_dev->id.bustype = BUS_I2C; |
| 79 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR); |
| 80 | set_bit(KEY_POWER, input_dev->keybit); |
| 81 | |
| 82 | ret = input_register_device(input_dev); |
| 83 | if (ret) { |
| 84 | input_free_device(input_dev); |
| 85 | kfree(input); |
| 86 | return ret; |
| 87 | } |
| 88 | pcf50633_register_irq(pdata->pcf, PCF50633_IRQ_ONKEYR, |
| 89 | pcf50633_input_irq, input); |
| 90 | pcf50633_register_irq(pdata->pcf, PCF50633_IRQ_ONKEYF, |
| 91 | pcf50633_input_irq, input); |
| 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | static int __devexit pcf50633_input_remove(struct platform_device *pdev) |
| 97 | { |
| 98 | struct pcf50633_input *input = platform_get_drvdata(pdev); |
| 99 | |
| 100 | pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR); |
| 101 | pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF); |
| 102 | |
| 103 | input_unregister_device(input->input_dev); |
| 104 | kfree(input); |
| 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static struct platform_driver pcf50633_input_driver = { |
| 110 | .driver = { |
| 111 | .name = "pcf50633-input", |
| 112 | }, |
| 113 | .probe = pcf50633_input_probe, |
| 114 | .remove = __devexit_p(pcf50633_input_remove), |
| 115 | }; |
| 116 | |
| 117 | static int __init pcf50633_input_init(void) |
| 118 | { |
| 119 | return platform_driver_register(&pcf50633_input_driver); |
| 120 | } |
| 121 | module_init(pcf50633_input_init); |
| 122 | |
| 123 | static void __exit pcf50633_input_exit(void) |
| 124 | { |
| 125 | platform_driver_unregister(&pcf50633_input_driver); |
| 126 | } |
| 127 | module_exit(pcf50633_input_exit); |
| 128 | |
| 129 | MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); |
| 130 | MODULE_DESCRIPTION("PCF50633 input driver"); |
| 131 | MODULE_LICENSE("GPL"); |
| 132 | MODULE_ALIAS("platform:pcf50633-input"); |