Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/input/keyboard/adp5520-keys.c

  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/platform_device.h>
 12 #include <linux/input.h>
 13 #include <linux/mfd/adp5520.h>
 14 #include <linux/slab.h>
 15 #include <linux/device.h>
 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, &reg_val_lo);
 47                 adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_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, &reg_val_lo);
 52                 adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_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, &reg_val_lo);
 59                 adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_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, &reg_val_lo);
 64                 adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_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 adp5520_keys_probe(struct platform_device *pdev)
 73 {
 74         struct adp5520_keys_platform_data *pdata = dev_get_platdata(&pdev->dev);
 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) {
 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 = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 94         if (!dev) {
 95                 dev_err(&pdev->dev, "failed to alloc memory\n");
 96                 return -ENOMEM;
 97         }
 98 
 99         input = devm_input_allocate_device(&pdev->dev);
100         if (!input)
101                 return -ENOMEM;
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");
137                 return ret;
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");
159                 return -EIO;
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");
167                 return ret;
168         }
169 
170         platform_set_drvdata(pdev, dev);
171         return 0;
172 }
173 
174 static int adp5520_keys_remove(struct platform_device *pdev)
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 
181         return 0;
182 }
183 
184 static struct platform_driver adp5520_keys_driver = {
185         .driver = {
186                 .name   = "adp5520-keys",
187                 .owner  = THIS_MODULE,
188         },
189         .probe          = adp5520_keys_probe,
190         .remove         = adp5520_keys_remove,
191 };
192 module_platform_driver(adp5520_keys_driver);
193 
194 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
195 MODULE_DESCRIPTION("Keys ADP5520 Driver");
196 MODULE_LICENSE("GPL");
197 MODULE_ALIAS("platform:adp5520-keys");
198 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us