1 // SPDX-License-Identifier: GPL-2.0-or-later
10 #include <linux/module.h>
11 #include <linux/i2c.h>
12 #include <linux/interrupt.h>
13 #include <linux/input.h>
14 #include <linux/irq.h>
15 #include <linux/slab.h>
16 #include <linux/platform_data/mcs.h>
17 #include <linux/pm.h>
51 	unsigned short keycodes[];  member
57 	struct mcs_touchkey_chip *chip = &data->chip;  in mcs_touchkey_interrupt()
58 	struct i2c_client *client = data->client;  in mcs_touchkey_interrupt()
59 	struct input_dev *input = data->input_dev;  in mcs_touchkey_interrupt()
64 	val = i2c_smbus_read_byte_data(client, chip->status_reg);  in mcs_touchkey_interrupt()
66 		dev_err(&client->dev, "i2c read error [%d]\n", val);  in mcs_touchkey_interrupt()
70 	pressed = (val & (1 << chip->pressbit)) >> chip->pressbit;  in mcs_touchkey_interrupt()
71 	if (chip->press_invert)  in mcs_touchkey_interrupt()
72 		pressed ^= chip->press_invert;  in mcs_touchkey_interrupt()
76 		key_val = val & (0xff >> (8 - chip->pressbit));  in mcs_touchkey_interrupt()
79 		key_val -= chip->baseval;  in mcs_touchkey_interrupt()
80 		data->key_code = data->keycodes[key_val];  in mcs_touchkey_interrupt()
81 		data->key_val = key_val;  in mcs_touchkey_interrupt()
84 	input_event(input, EV_MSC, MSC_SCAN, data->key_val);  in mcs_touchkey_interrupt()
85 	input_report_key(input, data->key_code, pressed);  in mcs_touchkey_interrupt()
88 	dev_dbg(&client->dev, "key %d %d %s\n", data->key_val, data->key_code,  in mcs_touchkey_interrupt()
106 	pdata = dev_get_platdata(&client->dev);  in mcs_touchkey_probe()
108 		dev_err(&client->dev, "no platform data defined\n");  in mcs_touchkey_probe()
109 		return -EINVAL;  in mcs_touchkey_probe()
112 	data = kzalloc(struct_size(data, keycodes, pdata->key_maxval + 1),  in mcs_touchkey_probe()
116 		dev_err(&client->dev, "Failed to allocate memory\n");  in mcs_touchkey_probe()
117 		error = -ENOMEM;  in mcs_touchkey_probe()
121 	data->client = client;  in mcs_touchkey_probe()
122 	data->input_dev = input_dev;  in mcs_touchkey_probe()
124 	if (id->driver_data == MCS5000_TOUCHKEY) {  in mcs_touchkey_probe()
125 		data->chip.status_reg = MCS5000_TOUCHKEY_STATUS;  in mcs_touchkey_probe()
126 		data->chip.pressbit = MCS5000_TOUCHKEY_STATUS_PRESS;  in mcs_touchkey_probe()
127 		data->chip.baseval = MCS5000_TOUCHKEY_BASE_VAL;  in mcs_touchkey_probe()
130 		data->chip.status_reg = MCS5080_TOUCHKEY_STATUS;  in mcs_touchkey_probe()
131 		data->chip.pressbit = MCS5080_TOUCHKEY_STATUS_PRESS;  in mcs_touchkey_probe()
132 		data->chip.press_invert = 1;  in mcs_touchkey_probe()
133 		data->chip.baseval = MCS5080_TOUCHKEY_BASE_VAL;  in mcs_touchkey_probe()
140 		dev_err(&client->dev, "i2c read error[%d]\n", error);  in mcs_touchkey_probe()
143 	dev_info(&client->dev, "Firmware version: %d\n", fw_ver);  in mcs_touchkey_probe()
145 	input_dev->name = "MELFAS MCS Touchkey";  in mcs_touchkey_probe()
146 	input_dev->id.bustype = BUS_I2C;  in mcs_touchkey_probe()
147 	input_dev->dev.parent = &client->dev;  in mcs_touchkey_probe()
148 	input_dev->evbit[0] = BIT_MASK(EV_KEY);  in mcs_touchkey_probe()
149 	if (!pdata->no_autorepeat)  in mcs_touchkey_probe()
150 		input_dev->evbit[0] |= BIT_MASK(EV_REP);  in mcs_touchkey_probe()
151 	input_dev->keycode = data->keycodes;  in mcs_touchkey_probe()
152 	input_dev->keycodesize = sizeof(data->keycodes[0]);  in mcs_touchkey_probe()
153 	input_dev->keycodemax = pdata->key_maxval + 1;  in mcs_touchkey_probe()
155 	for (i = 0; i < pdata->keymap_size; i++) {  in mcs_touchkey_probe()
156 		unsigned int val = MCS_KEY_VAL(pdata->keymap[i]);  in mcs_touchkey_probe()
157 		unsigned int code = MCS_KEY_CODE(pdata->keymap[i]);  in mcs_touchkey_probe()
159 		data->keycodes[val] = code;  in mcs_touchkey_probe()
160 		__set_bit(code, input_dev->keybit);  in mcs_touchkey_probe()
166 	if (pdata->cfg_pin)  in mcs_touchkey_probe()
167 		pdata->cfg_pin();  in mcs_touchkey_probe()
169 	if (pdata->poweron) {  in mcs_touchkey_probe()
170 		data->poweron = pdata->poweron;  in mcs_touchkey_probe()
171 		data->poweron(true);  in mcs_touchkey_probe()
174 	error = request_threaded_irq(client->irq, NULL, mcs_touchkey_interrupt,  in mcs_touchkey_probe()
176 				     client->dev.driver->name, data);  in mcs_touchkey_probe()
178 		dev_err(&client->dev, "Failed to register interrupt\n");  in mcs_touchkey_probe()
190 	free_irq(client->irq, data);  in mcs_touchkey_probe()
201 	free_irq(client->irq, data);  in mcs_touchkey_remove()
202 	if (data->poweron)  in mcs_touchkey_remove()
203 		data->poweron(false);  in mcs_touchkey_remove()
204 	input_unregister_device(data->input_dev);  in mcs_touchkey_remove()
212 	if (data->poweron)  in mcs_touchkey_shutdown()
213 		data->poweron(false);  in mcs_touchkey_shutdown()
220 	struct i2c_client *client = data->client;  in mcs_touchkey_suspend()
223 	disable_irq(client->irq);  in mcs_touchkey_suspend()
226 	if (data->poweron)  in mcs_touchkey_suspend()
227 		data->poweron(false);  in mcs_touchkey_suspend()
235 	struct i2c_client *client = data->client;  in mcs_touchkey_resume()
238 	if (data->poweron)  in mcs_touchkey_resume()
239 		data->poweron(true);  in mcs_touchkey_resume()
242 	enable_irq(client->irq);  in mcs_touchkey_resume()