Commit | Line | Data |
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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> | |
fba65fe0 MH |
11 | #include <linux/platform_device.h> |
12 | #include <linux/input.h> | |
13 | #include <linux/mfd/adp5520.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
ec62c7a8 | 15 | #include <linux/device.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 | ||
5298cc4c | 72 | static int adp5520_keys_probe(struct platform_device *pdev) |
fba65fe0 | 73 | { |
c838cb3d | 74 | struct adp5520_keys_platform_data *pdata = dev_get_platdata(&pdev->dev); |
fba65fe0 MH |
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 | ||
ec62c7a8 | 85 | if (!pdata) { |
fba65fe0 MH |
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 | ||
ec62c7a8 HS |
93 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); |
94 | if (!dev) { | |
fba65fe0 MH |
95 | dev_err(&pdev->dev, "failed to alloc memory\n"); |
96 | return -ENOMEM; | |
97 | } | |
98 | ||
ec62c7a8 HS |
99 | input = devm_input_allocate_device(&pdev->dev); |
100 | if (!input) | |
101 | return -ENOMEM; | |
fba65fe0 MH |
102 | |
103 | dev->master = pdev->dev.parent; | |
104 | dev->input = input; | |
105 | ||
106 | input->name = pdev->name; | |
107 | input->phys = "adp5520-keys/input0"; | |
108 | input->dev.parent = &pdev->dev; | |
109 | ||
110 | input_set_drvdata(input, dev); | |
111 | ||
112 | input->id.bustype = BUS_I2C; | |
113 | input->id.vendor = 0x0001; | |
114 | input->id.product = 0x5520; | |
115 | input->id.version = 0x0001; | |
116 | ||
117 | input->keycodesize = sizeof(dev->keycode[0]); | |
118 | input->keycodemax = pdata->keymapsize; | |
119 | input->keycode = dev->keycode; | |
120 | ||
121 | memcpy(dev->keycode, pdata->keymap, | |
122 | pdata->keymapsize * input->keycodesize); | |
123 | ||
124 | /* setup input device */ | |
125 | __set_bit(EV_KEY, input->evbit); | |
126 | ||
127 | if (pdata->repeat) | |
128 | __set_bit(EV_REP, input->evbit); | |
129 | ||
130 | for (i = 0; i < input->keycodemax; i++) | |
131 | __set_bit(dev->keycode[i], input->keybit); | |
132 | __clear_bit(KEY_RESERVED, input->keybit); | |
133 | ||
134 | ret = input_register_device(input); | |
135 | if (ret) { | |
136 | dev_err(&pdev->dev, "unable to register input device\n"); | |
ec62c7a8 | 137 | return ret; |
fba65fe0 MH |
138 | } |
139 | ||
140 | en_mask = pdata->rows_en_mask | pdata->cols_en_mask; | |
141 | ||
142 | ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask); | |
143 | ||
144 | if (en_mask & ADP5520_COL_C3) | |
145 | ctl_mask |= ADP5520_C3_MODE; | |
146 | ||
147 | if (en_mask & ADP5520_ROW_R3) | |
148 | ctl_mask |= ADP5520_R3_MODE; | |
149 | ||
150 | if (ctl_mask) | |
151 | ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL, | |
152 | ctl_mask); | |
153 | ||
154 | ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP, | |
155 | pdata->rows_en_mask); | |
156 | ||
157 | if (ret) { | |
158 | dev_err(&pdev->dev, "failed to write\n"); | |
ec62c7a8 | 159 | return -EIO; |
fba65fe0 MH |
160 | } |
161 | ||
162 | dev->notifier.notifier_call = adp5520_keys_notifier; | |
163 | ret = adp5520_register_notifier(dev->master, &dev->notifier, | |
164 | ADP5520_KP_IEN | ADP5520_KR_IEN); | |
165 | if (ret) { | |
166 | dev_err(&pdev->dev, "failed to register notifier\n"); | |
ec62c7a8 | 167 | return ret; |
fba65fe0 MH |
168 | } |
169 | ||
170 | platform_set_drvdata(pdev, dev); | |
171 | return 0; | |
fba65fe0 MH |
172 | } |
173 | ||
e2619cf7 | 174 | static int adp5520_keys_remove(struct platform_device *pdev) |
fba65fe0 MH |
175 | { |
176 | struct adp5520_keys *dev = platform_get_drvdata(pdev); | |
177 | ||
178 | adp5520_unregister_notifier(dev->master, &dev->notifier, | |
179 | ADP5520_KP_IEN | ADP5520_KR_IEN); | |
180 | ||
fba65fe0 MH |
181 | return 0; |
182 | } | |
183 | ||
184 | static struct platform_driver adp5520_keys_driver = { | |
185 | .driver = { | |
186 | .name = "adp5520-keys", | |
fba65fe0 MH |
187 | }, |
188 | .probe = adp5520_keys_probe, | |
1cb0aa88 | 189 | .remove = adp5520_keys_remove, |
fba65fe0 | 190 | }; |
5146c84f | 191 | module_platform_driver(adp5520_keys_driver); |
fba65fe0 MH |
192 | |
193 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
194 | MODULE_DESCRIPTION("Keys ADP5520 Driver"); | |
195 | MODULE_LICENSE("GPL"); | |
196 | MODULE_ALIAS("platform:adp5520-keys"); |