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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
38e783b3 JS |
2 | /* |
3 | * mcs5000_ts.c - Touchscreen driver for MELFAS MCS-5000 controller | |
4 | * | |
5 | * Copyright (C) 2009 Samsung Electronics Co.Ltd | |
6 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> | |
7 | * | |
8 | * Based on wm97xx-core.c | |
38e783b3 JS |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
38e783b3 | 12 | #include <linux/i2c.h> |
38e783b3 JS |
13 | #include <linux/interrupt.h> |
14 | #include <linux/input.h> | |
15 | #include <linux/irq.h> | |
8cd9ab9e | 16 | #include <linux/platform_data/mcs.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
38e783b3 JS |
18 | |
19 | /* Registers */ | |
20 | #define MCS5000_TS_STATUS 0x00 | |
21 | #define STATUS_OFFSET 0 | |
22 | #define STATUS_NO (0 << STATUS_OFFSET) | |
23 | #define STATUS_INIT (1 << STATUS_OFFSET) | |
24 | #define STATUS_SENSING (2 << STATUS_OFFSET) | |
25 | #define STATUS_COORD (3 << STATUS_OFFSET) | |
26 | #define STATUS_GESTURE (4 << STATUS_OFFSET) | |
27 | #define ERROR_OFFSET 4 | |
28 | #define ERROR_NO (0 << ERROR_OFFSET) | |
29 | #define ERROR_POWER_ON_RESET (1 << ERROR_OFFSET) | |
30 | #define ERROR_INT_RESET (2 << ERROR_OFFSET) | |
31 | #define ERROR_EXT_RESET (3 << ERROR_OFFSET) | |
32 | #define ERROR_INVALID_REG_ADDRESS (8 << ERROR_OFFSET) | |
33 | #define ERROR_INVALID_REG_VALUE (9 << ERROR_OFFSET) | |
34 | ||
35 | #define MCS5000_TS_OP_MODE 0x01 | |
36 | #define RESET_OFFSET 0 | |
37 | #define RESET_NO (0 << RESET_OFFSET) | |
38 | #define RESET_EXT_SOFT (1 << RESET_OFFSET) | |
39 | #define OP_MODE_OFFSET 1 | |
40 | #define OP_MODE_SLEEP (0 << OP_MODE_OFFSET) | |
41 | #define OP_MODE_ACTIVE (1 << OP_MODE_OFFSET) | |
42 | #define GESTURE_OFFSET 4 | |
43 | #define GESTURE_DISABLE (0 << GESTURE_OFFSET) | |
44 | #define GESTURE_ENABLE (1 << GESTURE_OFFSET) | |
45 | #define PROXIMITY_OFFSET 5 | |
46 | #define PROXIMITY_DISABLE (0 << PROXIMITY_OFFSET) | |
47 | #define PROXIMITY_ENABLE (1 << PROXIMITY_OFFSET) | |
48 | #define SCAN_MODE_OFFSET 6 | |
49 | #define SCAN_MODE_INTERRUPT (0 << SCAN_MODE_OFFSET) | |
50 | #define SCAN_MODE_POLLING (1 << SCAN_MODE_OFFSET) | |
51 | #define REPORT_RATE_OFFSET 7 | |
52 | #define REPORT_RATE_40 (0 << REPORT_RATE_OFFSET) | |
53 | #define REPORT_RATE_80 (1 << REPORT_RATE_OFFSET) | |
54 | ||
55 | #define MCS5000_TS_SENS_CTL 0x02 | |
56 | #define MCS5000_TS_FILTER_CTL 0x03 | |
57 | #define PRI_FILTER_OFFSET 0 | |
58 | #define SEC_FILTER_OFFSET 4 | |
59 | ||
60 | #define MCS5000_TS_X_SIZE_UPPER 0x08 | |
61 | #define MCS5000_TS_X_SIZE_LOWER 0x09 | |
62 | #define MCS5000_TS_Y_SIZE_UPPER 0x0A | |
63 | #define MCS5000_TS_Y_SIZE_LOWER 0x0B | |
64 | ||
65 | #define MCS5000_TS_INPUT_INFO 0x10 | |
66 | #define INPUT_TYPE_OFFSET 0 | |
67 | #define INPUT_TYPE_NONTOUCH (0 << INPUT_TYPE_OFFSET) | |
68 | #define INPUT_TYPE_SINGLE (1 << INPUT_TYPE_OFFSET) | |
69 | #define INPUT_TYPE_DUAL (2 << INPUT_TYPE_OFFSET) | |
70 | #define INPUT_TYPE_PALM (3 << INPUT_TYPE_OFFSET) | |
71 | #define INPUT_TYPE_PROXIMITY (7 << INPUT_TYPE_OFFSET) | |
72 | #define GESTURE_CODE_OFFSET 3 | |
73 | #define GESTURE_CODE_NO (0 << GESTURE_CODE_OFFSET) | |
74 | ||
75 | #define MCS5000_TS_X_POS_UPPER 0x11 | |
76 | #define MCS5000_TS_X_POS_LOWER 0x12 | |
77 | #define MCS5000_TS_Y_POS_UPPER 0x13 | |
78 | #define MCS5000_TS_Y_POS_LOWER 0x14 | |
79 | #define MCS5000_TS_Z_POS 0x15 | |
80 | #define MCS5000_TS_WIDTH 0x16 | |
81 | #define MCS5000_TS_GESTURE_VAL 0x17 | |
82 | #define MCS5000_TS_MODULE_REV 0x20 | |
83 | #define MCS5000_TS_FIRMWARE_VER 0x21 | |
84 | ||
85 | /* Touchscreen absolute values */ | |
86 | #define MCS5000_MAX_XC 0x3ff | |
87 | #define MCS5000_MAX_YC 0x3ff | |
88 | ||
89 | enum mcs5000_ts_read_offset { | |
90 | READ_INPUT_INFO, | |
91 | READ_X_POS_UPPER, | |
92 | READ_X_POS_LOWER, | |
93 | READ_Y_POS_UPPER, | |
94 | READ_Y_POS_LOWER, | |
95 | READ_BLOCK_SIZE, | |
96 | }; | |
97 | ||
98 | /* Each client has this additional data */ | |
99 | struct mcs5000_ts_data { | |
100 | struct i2c_client *client; | |
101 | struct input_dev *input_dev; | |
312e8e8a | 102 | const struct mcs_platform_data *platform_data; |
38e783b3 JS |
103 | }; |
104 | ||
105 | static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id) | |
106 | { | |
107 | struct mcs5000_ts_data *data = dev_id; | |
108 | struct i2c_client *client = data->client; | |
109 | u8 buffer[READ_BLOCK_SIZE]; | |
110 | int err; | |
111 | int x; | |
112 | int y; | |
113 | ||
114 | err = i2c_smbus_read_i2c_block_data(client, MCS5000_TS_INPUT_INFO, | |
115 | READ_BLOCK_SIZE, buffer); | |
116 | if (err < 0) { | |
117 | dev_err(&client->dev, "%s, err[%d]\n", __func__, err); | |
118 | goto out; | |
119 | } | |
120 | ||
121 | switch (buffer[READ_INPUT_INFO]) { | |
122 | case INPUT_TYPE_NONTOUCH: | |
123 | input_report_key(data->input_dev, BTN_TOUCH, 0); | |
124 | input_sync(data->input_dev); | |
125 | break; | |
126 | ||
127 | case INPUT_TYPE_SINGLE: | |
128 | x = (buffer[READ_X_POS_UPPER] << 8) | buffer[READ_X_POS_LOWER]; | |
129 | y = (buffer[READ_Y_POS_UPPER] << 8) | buffer[READ_Y_POS_LOWER]; | |
130 | ||
131 | input_report_key(data->input_dev, BTN_TOUCH, 1); | |
132 | input_report_abs(data->input_dev, ABS_X, x); | |
133 | input_report_abs(data->input_dev, ABS_Y, y); | |
134 | input_sync(data->input_dev); | |
135 | break; | |
136 | ||
137 | case INPUT_TYPE_DUAL: | |
138 | /* TODO */ | |
139 | break; | |
140 | ||
141 | case INPUT_TYPE_PALM: | |
142 | /* TODO */ | |
143 | break; | |
144 | ||
145 | case INPUT_TYPE_PROXIMITY: | |
146 | /* TODO */ | |
147 | break; | |
148 | ||
149 | default: | |
150 | dev_err(&client->dev, "Unknown ts input type %d\n", | |
151 | buffer[READ_INPUT_INFO]); | |
152 | break; | |
153 | } | |
154 | ||
155 | out: | |
156 | return IRQ_HANDLED; | |
157 | } | |
158 | ||
f5189d07 BS |
159 | static void mcs5000_ts_phys_init(struct mcs5000_ts_data *data, |
160 | const struct mcs_platform_data *platform_data) | |
38e783b3 | 161 | { |
38e783b3 JS |
162 | struct i2c_client *client = data->client; |
163 | ||
164 | /* Touch reset & sleep mode */ | |
165 | i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, | |
166 | RESET_EXT_SOFT | OP_MODE_SLEEP); | |
167 | ||
168 | /* Touch size */ | |
169 | i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_UPPER, | |
170 | platform_data->x_size >> 8); | |
171 | i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_LOWER, | |
172 | platform_data->x_size & 0xff); | |
173 | i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_UPPER, | |
174 | platform_data->y_size >> 8); | |
175 | i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_LOWER, | |
176 | platform_data->y_size & 0xff); | |
177 | ||
178 | /* Touch active mode & 80 report rate */ | |
179 | i2c_smbus_write_byte_data(data->client, MCS5000_TS_OP_MODE, | |
180 | OP_MODE_ACTIVE | REPORT_RATE_80); | |
181 | } | |
182 | ||
e0715e3c | 183 | static int mcs5000_ts_probe(struct i2c_client *client) |
38e783b3 | 184 | { |
f5189d07 | 185 | const struct mcs_platform_data *pdata; |
38e783b3 JS |
186 | struct mcs5000_ts_data *data; |
187 | struct input_dev *input_dev; | |
f5189d07 | 188 | int error; |
38e783b3 | 189 | |
f5189d07 BS |
190 | pdata = dev_get_platdata(&client->dev); |
191 | if (!pdata) | |
38e783b3 JS |
192 | return -EINVAL; |
193 | ||
f5189d07 BS |
194 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
195 | if (!data) { | |
38e783b3 | 196 | dev_err(&client->dev, "Failed to allocate memory\n"); |
f5189d07 | 197 | return -ENOMEM; |
38e783b3 JS |
198 | } |
199 | ||
200 | data->client = client; | |
f5189d07 BS |
201 | |
202 | input_dev = devm_input_allocate_device(&client->dev); | |
203 | if (!input_dev) { | |
204 | dev_err(&client->dev, "Failed to allocate input device\n"); | |
205 | return -ENOMEM; | |
206 | } | |
38e783b3 | 207 | |
21d128a7 | 208 | input_dev->name = "MELFAS MCS-5000 Touchscreen"; |
38e783b3 JS |
209 | input_dev->id.bustype = BUS_I2C; |
210 | input_dev->dev.parent = &client->dev; | |
211 | ||
212 | __set_bit(EV_ABS, input_dev->evbit); | |
213 | __set_bit(EV_KEY, input_dev->evbit); | |
214 | __set_bit(BTN_TOUCH, input_dev->keybit); | |
215 | input_set_abs_params(input_dev, ABS_X, 0, MCS5000_MAX_XC, 0, 0); | |
216 | input_set_abs_params(input_dev, ABS_Y, 0, MCS5000_MAX_YC, 0, 0); | |
217 | ||
f5189d07 | 218 | data->input_dev = input_dev; |
38e783b3 | 219 | |
f5189d07 BS |
220 | if (pdata->cfg_pin) |
221 | pdata->cfg_pin(); | |
38e783b3 | 222 | |
f5189d07 BS |
223 | error = devm_request_threaded_irq(&client->dev, client->irq, |
224 | NULL, mcs5000_ts_interrupt, | |
225 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
226 | "mcs5000_ts", data); | |
227 | if (error) { | |
38e783b3 | 228 | dev_err(&client->dev, "Failed to register interrupt\n"); |
f5189d07 | 229 | return error; |
38e783b3 JS |
230 | } |
231 | ||
f5189d07 BS |
232 | error = input_register_device(data->input_dev); |
233 | if (error) { | |
234 | dev_err(&client->dev, "Failed to register input device\n"); | |
235 | return error; | |
236 | } | |
38e783b3 | 237 | |
f5189d07 | 238 | mcs5000_ts_phys_init(data, pdata); |
38e783b3 JS |
239 | i2c_set_clientdata(client, data); |
240 | ||
38e783b3 JS |
241 | return 0; |
242 | } | |
243 | ||
70f36d0c | 244 | static int mcs5000_ts_suspend(struct device *dev) |
38e783b3 | 245 | { |
92b672e2 MB |
246 | struct i2c_client *client = to_i2c_client(dev); |
247 | ||
38e783b3 JS |
248 | /* Touch sleep mode */ |
249 | i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, OP_MODE_SLEEP); | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
70f36d0c | 254 | static int mcs5000_ts_resume(struct device *dev) |
38e783b3 | 255 | { |
92b672e2 | 256 | struct i2c_client *client = to_i2c_client(dev); |
38e783b3 | 257 | struct mcs5000_ts_data *data = i2c_get_clientdata(client); |
f5189d07 | 258 | const struct mcs_platform_data *pdata = dev_get_platdata(dev); |
38e783b3 | 259 | |
f5189d07 | 260 | mcs5000_ts_phys_init(data, pdata); |
38e783b3 JS |
261 | |
262 | return 0; | |
263 | } | |
92b672e2 | 264 | |
70f36d0c JC |
265 | static DEFINE_SIMPLE_DEV_PM_OPS(mcs5000_ts_pm, |
266 | mcs5000_ts_suspend, mcs5000_ts_resume); | |
38e783b3 JS |
267 | |
268 | static const struct i2c_device_id mcs5000_ts_id[] = { | |
5852f2af | 269 | { "mcs5000_ts" }, |
38e783b3 JS |
270 | { } |
271 | }; | |
272 | MODULE_DEVICE_TABLE(i2c, mcs5000_ts_id); | |
273 | ||
274 | static struct i2c_driver mcs5000_ts_driver = { | |
d8bde56d | 275 | .probe = mcs5000_ts_probe, |
38e783b3 JS |
276 | .driver = { |
277 | .name = "mcs5000_ts", | |
70f36d0c | 278 | .pm = pm_sleep_ptr(&mcs5000_ts_pm), |
38e783b3 JS |
279 | }, |
280 | .id_table = mcs5000_ts_id, | |
281 | }; | |
282 | ||
1b92c1cf | 283 | module_i2c_driver(mcs5000_ts_driver); |
38e783b3 JS |
284 | |
285 | /* Module information */ | |
286 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | |
287 | MODULE_DESCRIPTION("Touchscreen driver for MELFAS MCS-5000 controller"); | |
288 | MODULE_LICENSE("GPL"); |