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1/*
2 * Input driver for PCAP events:
3 * * Power key
4 * * Headphone button
5 *
6 * Copyright (c) 2008,2009 Ilya Petrov <ilya.muromec@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/interrupt.h>
17#include <linux/platform_device.h>
18#include <linux/input.h>
19#include <linux/mfd/ezx-pcap.h>
20#include <linux/slab.h>
21
22struct pcap_keys {
23 struct pcap_chip *pcap;
24 struct input_dev *input;
25};
26
27/* PCAP2 interrupts us on keypress */
28static irqreturn_t pcap_keys_handler(int irq, void *_pcap_keys)
29{
30 struct pcap_keys *pcap_keys = _pcap_keys;
31 int pirq = irq_to_pcap(pcap_keys->pcap, irq);
32 u32 pstat;
33
34 ezx_pcap_read(pcap_keys->pcap, PCAP_REG_PSTAT, &pstat);
35 pstat &= 1 << pirq;
36
37 switch (pirq) {
38 case PCAP_IRQ_ONOFF:
39 input_report_key(pcap_keys->input, KEY_POWER, !pstat);
40 break;
41 case PCAP_IRQ_MIC:
42 input_report_key(pcap_keys->input, KEY_HP, !pstat);
43 break;
44 }
45
46 input_sync(pcap_keys->input);
47
48 return IRQ_HANDLED;
49}
50
51static int __devinit pcap_keys_probe(struct platform_device *pdev)
52{
53 int err = -ENOMEM;
54 struct pcap_keys *pcap_keys;
55 struct input_dev *input_dev;
56
57 pcap_keys = kmalloc(sizeof(struct pcap_keys), GFP_KERNEL);
58 if (!pcap_keys)
59 return err;
60
61 pcap_keys->pcap = dev_get_drvdata(pdev->dev.parent);
62
63 input_dev = input_allocate_device();
64 if (!input_dev)
65 goto fail;
66
67 pcap_keys->input = input_dev;
68
69 platform_set_drvdata(pdev, pcap_keys);
70 input_dev->name = pdev->name;
71 input_dev->phys = "pcap-keys/input0";
72 input_dev->id.bustype = BUS_HOST;
73 input_dev->dev.parent = &pdev->dev;
74
75 __set_bit(EV_KEY, input_dev->evbit);
76 __set_bit(KEY_POWER, input_dev->keybit);
77 __set_bit(KEY_HP, input_dev->keybit);
78
79 err = input_register_device(input_dev);
80 if (err)
81 goto fail_allocate;
82
83 err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF),
84 pcap_keys_handler, 0, "Power key", pcap_keys);
85 if (err)
86 goto fail_register;
87
88 err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC),
89 pcap_keys_handler, 0, "Headphone button", pcap_keys);
90 if (err)
91 goto fail_pwrkey;
92
93 return 0;
94
95fail_pwrkey:
96 free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
97fail_register:
98 input_unregister_device(input_dev);
99 goto fail;
100fail_allocate:
101 input_free_device(input_dev);
102fail:
103 kfree(pcap_keys);
104 return err;
105}
106
107static int __devexit pcap_keys_remove(struct platform_device *pdev)
108{
109 struct pcap_keys *pcap_keys = platform_get_drvdata(pdev);
110
111 free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
112 free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC), pcap_keys);
113
114 input_unregister_device(pcap_keys->input);
115 kfree(pcap_keys);
116
117 return 0;
118}
119
120static struct platform_driver pcap_keys_device_driver = {
121 .probe = pcap_keys_probe,
122 .remove = __devexit_p(pcap_keys_remove),
123 .driver = {
124 .name = "pcap-keys",
125 .owner = THIS_MODULE,
126 }
127};
128
129static int __init pcap_keys_init(void)
130{
131 return platform_driver_register(&pcap_keys_device_driver);
132};
133
134static void __exit pcap_keys_exit(void)
135{
136 platform_driver_unregister(&pcap_keys_device_driver);
137};
138
139module_init(pcap_keys_init);
140module_exit(pcap_keys_exit);
141
142MODULE_DESCRIPTION("Motorola PCAP2 input events driver");
143MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
144MODULE_LICENSE("GPL");
145MODULE_ALIAS("platform:pcap_keys");
1/*
2 * Input driver for PCAP events:
3 * * Power key
4 * * Headphone button
5 *
6 * Copyright (c) 2008,2009 Ilya Petrov <ilya.muromec@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/interrupt.h>
17#include <linux/platform_device.h>
18#include <linux/input.h>
19#include <linux/mfd/ezx-pcap.h>
20#include <linux/slab.h>
21
22struct pcap_keys {
23 struct pcap_chip *pcap;
24 struct input_dev *input;
25};
26
27/* PCAP2 interrupts us on keypress */
28static irqreturn_t pcap_keys_handler(int irq, void *_pcap_keys)
29{
30 struct pcap_keys *pcap_keys = _pcap_keys;
31 int pirq = irq_to_pcap(pcap_keys->pcap, irq);
32 u32 pstat;
33
34 ezx_pcap_read(pcap_keys->pcap, PCAP_REG_PSTAT, &pstat);
35 pstat &= 1 << pirq;
36
37 switch (pirq) {
38 case PCAP_IRQ_ONOFF:
39 input_report_key(pcap_keys->input, KEY_POWER, !pstat);
40 break;
41 case PCAP_IRQ_MIC:
42 input_report_key(pcap_keys->input, KEY_HP, !pstat);
43 break;
44 }
45
46 input_sync(pcap_keys->input);
47
48 return IRQ_HANDLED;
49}
50
51static int __devinit pcap_keys_probe(struct platform_device *pdev)
52{
53 int err = -ENOMEM;
54 struct pcap_keys *pcap_keys;
55 struct input_dev *input_dev;
56
57 pcap_keys = kmalloc(sizeof(struct pcap_keys), GFP_KERNEL);
58 if (!pcap_keys)
59 return err;
60
61 pcap_keys->pcap = dev_get_drvdata(pdev->dev.parent);
62
63 input_dev = input_allocate_device();
64 if (!input_dev)
65 goto fail;
66
67 pcap_keys->input = input_dev;
68
69 platform_set_drvdata(pdev, pcap_keys);
70 input_dev->name = pdev->name;
71 input_dev->phys = "pcap-keys/input0";
72 input_dev->id.bustype = BUS_HOST;
73 input_dev->dev.parent = &pdev->dev;
74
75 __set_bit(EV_KEY, input_dev->evbit);
76 __set_bit(KEY_POWER, input_dev->keybit);
77 __set_bit(KEY_HP, input_dev->keybit);
78
79 err = input_register_device(input_dev);
80 if (err)
81 goto fail_allocate;
82
83 err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF),
84 pcap_keys_handler, 0, "Power key", pcap_keys);
85 if (err)
86 goto fail_register;
87
88 err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC),
89 pcap_keys_handler, 0, "Headphone button", pcap_keys);
90 if (err)
91 goto fail_pwrkey;
92
93 return 0;
94
95fail_pwrkey:
96 free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
97fail_register:
98 input_unregister_device(input_dev);
99 goto fail;
100fail_allocate:
101 input_free_device(input_dev);
102fail:
103 kfree(pcap_keys);
104 return err;
105}
106
107static int __devexit pcap_keys_remove(struct platform_device *pdev)
108{
109 struct pcap_keys *pcap_keys = platform_get_drvdata(pdev);
110
111 free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
112 free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC), pcap_keys);
113
114 input_unregister_device(pcap_keys->input);
115 kfree(pcap_keys);
116
117 return 0;
118}
119
120static struct platform_driver pcap_keys_device_driver = {
121 .probe = pcap_keys_probe,
122 .remove = __devexit_p(pcap_keys_remove),
123 .driver = {
124 .name = "pcap-keys",
125 .owner = THIS_MODULE,
126 }
127};
128module_platform_driver(pcap_keys_device_driver);
129
130MODULE_DESCRIPTION("Motorola PCAP2 input events driver");
131MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
132MODULE_LICENSE("GPL");
133MODULE_ALIAS("platform:pcap_keys");