projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1851b06a BR |
1 | /* NXP PCF50633 Input Driver |
| 2 | * | |
| 3 | * (C) 2006-2008 by Openmoko, Inc. | |
| 4 | * Author: Balaji Rao <[email protected]> | |
| 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 <[email protected]>"); | |
| 130 | MODULE_DESCRIPTION("PCF50633 input driver"); | |
| 131 | MODULE_LICENSE("GPL"); | |
| 132 | MODULE_ALIAS("platform:pcf50633-input"); |