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