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fba65fe0 MH |
1 | /* |
2 | * Keypad driver for Analog Devices ADP5520 MFD PMICs | |
3 | * | |
4 | * Copyright 2009 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2 or later. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/input.h> | |
14 | #include <linux/mfd/adp5520.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
fba65fe0 MH |
16 | |
17 | struct adp5520_keys { | |
18 | struct input_dev *input; | |
19 | struct notifier_block notifier; | |
20 | struct device *master; | |
21 | unsigned short keycode[ADP5520_KEYMAPSIZE]; | |
22 | }; | |
23 | ||
24 | static void adp5520_keys_report_event(struct adp5520_keys *dev, | |
25 | unsigned short keymask, int value) | |
26 | { | |
27 | int i; | |
28 | ||
29 | for (i = 0; i < ADP5520_MAXKEYS; i++) | |
30 | if (keymask & (1 << i)) | |
31 | input_report_key(dev->input, dev->keycode[i], value); | |
32 | ||
33 | input_sync(dev->input); | |
34 | } | |
35 | ||
36 | static int adp5520_keys_notifier(struct notifier_block *nb, | |
37 | unsigned long event, void *data) | |
38 | { | |
39 | struct adp5520_keys *dev; | |
40 | uint8_t reg_val_lo, reg_val_hi; | |
41 | unsigned short keymask; | |
42 | ||
43 | dev = container_of(nb, struct adp5520_keys, notifier); | |
44 | ||
45 | if (event & ADP5520_KP_INT) { | |
46 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, ®_val_lo); | |
47 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, ®_val_hi); | |
48 | ||
49 | keymask = (reg_val_hi << 8) | reg_val_lo; | |
50 | /* Read twice to clear */ | |
51 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, ®_val_lo); | |
52 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, ®_val_hi); | |
53 | keymask |= (reg_val_hi << 8) | reg_val_lo; | |
54 | adp5520_keys_report_event(dev, keymask, 1); | |
55 | } | |
56 | ||
57 | if (event & ADP5520_KR_INT) { | |
58 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, ®_val_lo); | |
59 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, ®_val_hi); | |
60 | ||
61 | keymask = (reg_val_hi << 8) | reg_val_lo; | |
62 | /* Read twice to clear */ | |
63 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, ®_val_lo); | |
64 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, ®_val_hi); | |
65 | keymask |= (reg_val_hi << 8) | reg_val_lo; | |
66 | adp5520_keys_report_event(dev, keymask, 0); | |
67 | } | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static int __devinit adp5520_keys_probe(struct platform_device *pdev) | |
73 | { | |
74 | struct adp5520_keys_platform_data *pdata = pdev->dev.platform_data; | |
75 | struct input_dev *input; | |
76 | struct adp5520_keys *dev; | |
77 | int ret, i; | |
78 | unsigned char en_mask, ctl_mask = 0; | |
79 | ||
80 | if (pdev->id != ID_ADP5520) { | |
81 | dev_err(&pdev->dev, "only ADP5520 supports Keypad\n"); | |
82 | return -EINVAL; | |
83 | } | |
84 | ||
85 | if (pdata == NULL) { | |
86 | dev_err(&pdev->dev, "missing platform data\n"); | |
87 | return -EINVAL; | |
88 | } | |
89 | ||
90 | if (!(pdata->rows_en_mask && pdata->cols_en_mask)) | |
91 | return -EINVAL; | |
92 | ||
93 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
94 | if (dev == NULL) { | |
95 | dev_err(&pdev->dev, "failed to alloc memory\n"); | |
96 | return -ENOMEM; | |
97 | } | |
98 | ||
99 | input = input_allocate_device(); | |
100 | if (!input) { | |
101 | ret = -ENOMEM; | |
102 | goto err; | |
103 | } | |
104 | ||
105 | dev->master = pdev->dev.parent; | |
106 | dev->input = input; | |
107 | ||
108 | input->name = pdev->name; | |
109 | input->phys = "adp5520-keys/input0"; | |
110 | input->dev.parent = &pdev->dev; | |
111 | ||
112 | input_set_drvdata(input, dev); | |
113 | ||
114 | input->id.bustype = BUS_I2C; | |
115 | input->id.vendor = 0x0001; | |
116 | input->id.product = 0x5520; | |
117 | input->id.version = 0x0001; | |
118 | ||
119 | input->keycodesize = sizeof(dev->keycode[0]); | |
120 | input->keycodemax = pdata->keymapsize; | |
121 | input->keycode = dev->keycode; | |
122 | ||
123 | memcpy(dev->keycode, pdata->keymap, | |
124 | pdata->keymapsize * input->keycodesize); | |
125 | ||
126 | /* setup input device */ | |
127 | __set_bit(EV_KEY, input->evbit); | |
128 | ||
129 | if (pdata->repeat) | |
130 | __set_bit(EV_REP, input->evbit); | |
131 | ||
132 | for (i = 0; i < input->keycodemax; i++) | |
133 | __set_bit(dev->keycode[i], input->keybit); | |
134 | __clear_bit(KEY_RESERVED, input->keybit); | |
135 | ||
136 | ret = input_register_device(input); | |
137 | if (ret) { | |
138 | dev_err(&pdev->dev, "unable to register input device\n"); | |
139 | goto err; | |
140 | } | |
141 | ||
142 | en_mask = pdata->rows_en_mask | pdata->cols_en_mask; | |
143 | ||
144 | ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask); | |
145 | ||
146 | if (en_mask & ADP5520_COL_C3) | |
147 | ctl_mask |= ADP5520_C3_MODE; | |
148 | ||
149 | if (en_mask & ADP5520_ROW_R3) | |
150 | ctl_mask |= ADP5520_R3_MODE; | |
151 | ||
152 | if (ctl_mask) | |
153 | ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL, | |
154 | ctl_mask); | |
155 | ||
156 | ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP, | |
157 | pdata->rows_en_mask); | |
158 | ||
159 | if (ret) { | |
160 | dev_err(&pdev->dev, "failed to write\n"); | |
161 | ret = -EIO; | |
162 | goto err1; | |
163 | } | |
164 | ||
165 | dev->notifier.notifier_call = adp5520_keys_notifier; | |
166 | ret = adp5520_register_notifier(dev->master, &dev->notifier, | |
167 | ADP5520_KP_IEN | ADP5520_KR_IEN); | |
168 | if (ret) { | |
169 | dev_err(&pdev->dev, "failed to register notifier\n"); | |
170 | goto err1; | |
171 | } | |
172 | ||
173 | platform_set_drvdata(pdev, dev); | |
174 | return 0; | |
175 | ||
176 | err1: | |
177 | input_unregister_device(input); | |
178 | input = NULL; | |
179 | err: | |
180 | input_free_device(input); | |
181 | kfree(dev); | |
182 | return ret; | |
183 | } | |
184 | ||
185 | static int __devexit adp5520_keys_remove(struct platform_device *pdev) | |
186 | { | |
187 | struct adp5520_keys *dev = platform_get_drvdata(pdev); | |
188 | ||
189 | adp5520_unregister_notifier(dev->master, &dev->notifier, | |
190 | ADP5520_KP_IEN | ADP5520_KR_IEN); | |
191 | ||
192 | input_unregister_device(dev->input); | |
193 | kfree(dev); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static struct platform_driver adp5520_keys_driver = { | |
198 | .driver = { | |
199 | .name = "adp5520-keys", | |
200 | .owner = THIS_MODULE, | |
201 | }, | |
202 | .probe = adp5520_keys_probe, | |
203 | .remove = __devexit_p(adp5520_keys_remove), | |
204 | }; | |
5146c84f | 205 | module_platform_driver(adp5520_keys_driver); |
fba65fe0 MH |
206 | |
207 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
208 | MODULE_DESCRIPTION("Keys ADP5520 Driver"); | |
209 | MODULE_LICENSE("GPL"); | |
210 | MODULE_ALIAS("platform:adp5520-keys"); |