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
 17struct adp5520_keys {
 18	struct input_dev *input;
 19	struct notifier_block notifier;
 20	struct device *master;
 21	unsigned short keycode[ADP5520_KEYMAPSIZE];
 22};
 23
 24static 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
 36static 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
 72static 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
174static 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
184static struct platform_driver adp5520_keys_driver = {
185	.driver	= {
186		.name	= "adp5520-keys",
 
187	},
188	.probe		= adp5520_keys_probe,
189	.remove		= adp5520_keys_remove,
190};
191module_platform_driver(adp5520_keys_driver);
 
 
 
 
 
 
 
 
 
 
 
192
193MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
194MODULE_DESCRIPTION("Keys ADP5520 Driver");
195MODULE_LICENSE("GPL");
196MODULE_ALIAS("platform:adp5520-keys");

  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>
 15#include <linux/slab.h>
 
 16
 17struct adp5520_keys {
 18	struct input_dev *input;
 19	struct notifier_block notifier;
 20	struct device *master;
 21	unsigned short keycode[ADP5520_KEYMAPSIZE];
 22};
 23
 24static 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
 36static 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
 72static 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
176err1:
177	input_unregister_device(input);
178	input = NULL;
179err:
180	input_free_device(input);
181	kfree(dev);
182	return ret;
183}
184
185static 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
197static 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};
205
206static int __init adp5520_keys_init(void)
207{
208	return platform_driver_register(&adp5520_keys_driver);
209}
210module_init(adp5520_keys_init);
211
212static void __exit adp5520_keys_exit(void)
213{
214	platform_driver_unregister(&adp5520_keys_driver);
215}
216module_exit(adp5520_keys_exit);
217
218MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
219MODULE_DESCRIPTION("Keys ADP5520 Driver");
220MODULE_LICENSE("GPL");
221MODULE_ALIAS("platform:adp5520-keys");