1c6d81bd7SHeiko Stübner /* 2c6d81bd7SHeiko Stübner * Copyright (C) 2012-2013 MundoReader S.L. 3c6d81bd7SHeiko Stübner * Author: Heiko Stuebner <heiko@sntech.de> 4c6d81bd7SHeiko Stübner * 5c6d81bd7SHeiko Stübner * based in parts on Nook zforce driver 6c6d81bd7SHeiko Stübner * 7c6d81bd7SHeiko Stübner * Copyright (C) 2010 Barnes & Noble, Inc. 8c6d81bd7SHeiko Stübner * Author: Pieter Truter<ptruter@intrinsyc.com> 9c6d81bd7SHeiko Stübner * 10c6d81bd7SHeiko Stübner * This software is licensed under the terms of the GNU General Public 11c6d81bd7SHeiko Stübner * License version 2, as published by the Free Software Foundation, and 12c6d81bd7SHeiko Stübner * may be copied, distributed, and modified under those terms. 13c6d81bd7SHeiko Stübner * 14c6d81bd7SHeiko Stübner * This program is distributed in the hope that it will be useful, 15c6d81bd7SHeiko Stübner * but WITHOUT ANY WARRANTY; without even the implied warranty of 16c6d81bd7SHeiko Stübner * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17c6d81bd7SHeiko Stübner * GNU General Public License for more details. 18c6d81bd7SHeiko Stübner */ 19c6d81bd7SHeiko Stübner 20c6d81bd7SHeiko Stübner #include <linux/module.h> 21c6d81bd7SHeiko Stübner #include <linux/hrtimer.h> 22c6d81bd7SHeiko Stübner #include <linux/slab.h> 23c6d81bd7SHeiko Stübner #include <linux/input.h> 24c6d81bd7SHeiko Stübner #include <linux/interrupt.h> 25c6d81bd7SHeiko Stübner #include <linux/i2c.h> 26c6d81bd7SHeiko Stübner #include <linux/delay.h> 27c6d81bd7SHeiko Stübner #include <linux/gpio.h> 28c6d81bd7SHeiko Stübner #include <linux/device.h> 29c6d81bd7SHeiko Stübner #include <linux/sysfs.h> 30c6d81bd7SHeiko Stübner #include <linux/input/mt.h> 31c6d81bd7SHeiko Stübner #include <linux/platform_data/zforce_ts.h> 326f2e6c9bSHeiko Stübner #include <linux/of.h> 336f2e6c9bSHeiko Stübner #include <linux/of_gpio.h> 34c6d81bd7SHeiko Stübner 35c6d81bd7SHeiko Stübner #define WAIT_TIMEOUT msecs_to_jiffies(1000) 36c6d81bd7SHeiko Stübner 37c6d81bd7SHeiko Stübner #define FRAME_START 0xee 38d333b606SLuis Ortega #define FRAME_MAXSIZE 257 39c6d81bd7SHeiko Stübner 40c6d81bd7SHeiko Stübner /* Offsets of the different parts of the payload the controller sends */ 41c6d81bd7SHeiko Stübner #define PAYLOAD_HEADER 0 42c6d81bd7SHeiko Stübner #define PAYLOAD_LENGTH 1 43c6d81bd7SHeiko Stübner #define PAYLOAD_BODY 2 44c6d81bd7SHeiko Stübner 45c6d81bd7SHeiko Stübner /* Response offsets */ 46c6d81bd7SHeiko Stübner #define RESPONSE_ID 0 47c6d81bd7SHeiko Stübner #define RESPONSE_DATA 1 48c6d81bd7SHeiko Stübner 49c6d81bd7SHeiko Stübner /* Commands */ 50c6d81bd7SHeiko Stübner #define COMMAND_DEACTIVATE 0x00 51c6d81bd7SHeiko Stübner #define COMMAND_INITIALIZE 0x01 52c6d81bd7SHeiko Stübner #define COMMAND_RESOLUTION 0x02 53c6d81bd7SHeiko Stübner #define COMMAND_SETCONFIG 0x03 54c6d81bd7SHeiko Stübner #define COMMAND_DATAREQUEST 0x04 55c6d81bd7SHeiko Stübner #define COMMAND_SCANFREQ 0x08 56c6d81bd7SHeiko Stübner #define COMMAND_STATUS 0X1e 57c6d81bd7SHeiko Stübner 58c6d81bd7SHeiko Stübner /* 59c6d81bd7SHeiko Stübner * Responses the controller sends as a result of 60c6d81bd7SHeiko Stübner * command requests 61c6d81bd7SHeiko Stübner */ 62c6d81bd7SHeiko Stübner #define RESPONSE_DEACTIVATE 0x00 63c6d81bd7SHeiko Stübner #define RESPONSE_INITIALIZE 0x01 64c6d81bd7SHeiko Stübner #define RESPONSE_RESOLUTION 0x02 65c6d81bd7SHeiko Stübner #define RESPONSE_SETCONFIG 0x03 66c6d81bd7SHeiko Stübner #define RESPONSE_SCANFREQ 0x08 67c6d81bd7SHeiko Stübner #define RESPONSE_STATUS 0X1e 68c6d81bd7SHeiko Stübner 69c6d81bd7SHeiko Stübner /* 70deb49819SLuis Ortega * Notifications are sent by the touch controller without 71c6d81bd7SHeiko Stübner * being requested by the driver and include for example 72c6d81bd7SHeiko Stübner * touch indications 73c6d81bd7SHeiko Stübner */ 74c6d81bd7SHeiko Stübner #define NOTIFICATION_TOUCH 0x04 75c6d81bd7SHeiko Stübner #define NOTIFICATION_BOOTCOMPLETE 0x07 76c6d81bd7SHeiko Stübner #define NOTIFICATION_OVERRUN 0x25 77c6d81bd7SHeiko Stübner #define NOTIFICATION_PROXIMITY 0x26 78c6d81bd7SHeiko Stübner #define NOTIFICATION_INVALID_COMMAND 0xfe 79c6d81bd7SHeiko Stübner 80c6d81bd7SHeiko Stübner #define ZFORCE_REPORT_POINTS 2 81c6d81bd7SHeiko Stübner #define ZFORCE_MAX_AREA 0xff 82c6d81bd7SHeiko Stübner 83c6d81bd7SHeiko Stübner #define STATE_DOWN 0 84c6d81bd7SHeiko Stübner #define STATE_MOVE 1 85c6d81bd7SHeiko Stübner #define STATE_UP 2 86c6d81bd7SHeiko Stübner 87c6d81bd7SHeiko Stübner #define SETCONFIG_DUALTOUCH (1 << 0) 88c6d81bd7SHeiko Stübner 89c6d81bd7SHeiko Stübner struct zforce_point { 90c6d81bd7SHeiko Stübner int coord_x; 91c6d81bd7SHeiko Stübner int coord_y; 92c6d81bd7SHeiko Stübner int state; 93c6d81bd7SHeiko Stübner int id; 94c6d81bd7SHeiko Stübner int area_major; 95c6d81bd7SHeiko Stübner int area_minor; 96c6d81bd7SHeiko Stübner int orientation; 97c6d81bd7SHeiko Stübner int pressure; 98c6d81bd7SHeiko Stübner int prblty; 99c6d81bd7SHeiko Stübner }; 100c6d81bd7SHeiko Stübner 101c6d81bd7SHeiko Stübner /* 102c6d81bd7SHeiko Stübner * @client the i2c_client 103c6d81bd7SHeiko Stübner * @input the input device 104c6d81bd7SHeiko Stübner * @suspending in the process of going to suspend (don't emit wakeup 105c6d81bd7SHeiko Stübner * events for commands executed to suspend the device) 106c6d81bd7SHeiko Stübner * @suspended device suspended 107c6d81bd7SHeiko Stübner * @access_mutex serialize i2c-access, to keep multipart reads together 108c6d81bd7SHeiko Stübner * @command_done completion to wait for the command result 109deb49819SLuis Ortega * @command_mutex serialize commands sent to the ic 110deb49819SLuis Ortega * @command_waiting the id of the command that is currently waiting 111c6d81bd7SHeiko Stübner * for a result 112c6d81bd7SHeiko Stübner * @command_result returned result of the command 113c6d81bd7SHeiko Stübner */ 114c6d81bd7SHeiko Stübner struct zforce_ts { 115c6d81bd7SHeiko Stübner struct i2c_client *client; 116c6d81bd7SHeiko Stübner struct input_dev *input; 117c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata; 118c6d81bd7SHeiko Stübner char phys[32]; 119c6d81bd7SHeiko Stübner 120c6d81bd7SHeiko Stübner bool suspending; 121c6d81bd7SHeiko Stübner bool suspended; 122c6d81bd7SHeiko Stübner bool boot_complete; 123c6d81bd7SHeiko Stübner 124c6d81bd7SHeiko Stübner /* Firmware version information */ 125c6d81bd7SHeiko Stübner u16 version_major; 126c6d81bd7SHeiko Stübner u16 version_minor; 127c6d81bd7SHeiko Stübner u16 version_build; 128c6d81bd7SHeiko Stübner u16 version_rev; 129c6d81bd7SHeiko Stübner 130c6d81bd7SHeiko Stübner struct mutex access_mutex; 131c6d81bd7SHeiko Stübner 132c6d81bd7SHeiko Stübner struct completion command_done; 133c6d81bd7SHeiko Stübner struct mutex command_mutex; 134c6d81bd7SHeiko Stübner int command_waiting; 135c6d81bd7SHeiko Stübner int command_result; 136c6d81bd7SHeiko Stübner }; 137c6d81bd7SHeiko Stübner 138c6d81bd7SHeiko Stübner static int zforce_command(struct zforce_ts *ts, u8 cmd) 139c6d81bd7SHeiko Stübner { 140c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 141c6d81bd7SHeiko Stübner char buf[3]; 142c6d81bd7SHeiko Stübner int ret; 143c6d81bd7SHeiko Stübner 144c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); 145c6d81bd7SHeiko Stübner 146c6d81bd7SHeiko Stübner buf[0] = FRAME_START; 147c6d81bd7SHeiko Stübner buf[1] = 1; /* data size, command only */ 148c6d81bd7SHeiko Stübner buf[2] = cmd; 149c6d81bd7SHeiko Stübner 150c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 151c6d81bd7SHeiko Stübner ret = i2c_master_send(client, &buf[0], ARRAY_SIZE(buf)); 152c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 153c6d81bd7SHeiko Stübner if (ret < 0) { 154c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 155c6d81bd7SHeiko Stübner return ret; 156c6d81bd7SHeiko Stübner } 157c6d81bd7SHeiko Stübner 158c6d81bd7SHeiko Stübner return 0; 159c6d81bd7SHeiko Stübner } 160c6d81bd7SHeiko Stübner 161c6d81bd7SHeiko Stübner static int zforce_send_wait(struct zforce_ts *ts, const char *buf, int len) 162c6d81bd7SHeiko Stübner { 163c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 164c6d81bd7SHeiko Stübner int ret; 165c6d81bd7SHeiko Stübner 166c6d81bd7SHeiko Stübner ret = mutex_trylock(&ts->command_mutex); 167c6d81bd7SHeiko Stübner if (!ret) { 168c6d81bd7SHeiko Stübner dev_err(&client->dev, "already waiting for a command\n"); 169c6d81bd7SHeiko Stübner return -EBUSY; 170c6d81bd7SHeiko Stübner } 171c6d81bd7SHeiko Stübner 172c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "sending %d bytes for command 0x%x\n", 173c6d81bd7SHeiko Stübner buf[1], buf[2]); 174c6d81bd7SHeiko Stübner 175c6d81bd7SHeiko Stübner ts->command_waiting = buf[2]; 176c6d81bd7SHeiko Stübner 177c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 178c6d81bd7SHeiko Stübner ret = i2c_master_send(client, buf, len); 179c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 180c6d81bd7SHeiko Stübner if (ret < 0) { 181c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 182c6d81bd7SHeiko Stübner goto unlock; 183c6d81bd7SHeiko Stübner } 184c6d81bd7SHeiko Stübner 185c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "waiting for result for command 0x%x\n", buf[2]); 186c6d81bd7SHeiko Stübner 187c6d81bd7SHeiko Stübner if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) { 188c6d81bd7SHeiko Stübner ret = -ETIME; 189c6d81bd7SHeiko Stübner goto unlock; 190c6d81bd7SHeiko Stübner } 191c6d81bd7SHeiko Stübner 192c6d81bd7SHeiko Stübner ret = ts->command_result; 193c6d81bd7SHeiko Stübner 194c6d81bd7SHeiko Stübner unlock: 195c6d81bd7SHeiko Stübner mutex_unlock(&ts->command_mutex); 196c6d81bd7SHeiko Stübner return ret; 197c6d81bd7SHeiko Stübner } 198c6d81bd7SHeiko Stübner 199c6d81bd7SHeiko Stübner static int zforce_command_wait(struct zforce_ts *ts, u8 cmd) 200c6d81bd7SHeiko Stübner { 201c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 202c6d81bd7SHeiko Stübner char buf[3]; 203c6d81bd7SHeiko Stübner int ret; 204c6d81bd7SHeiko Stübner 205c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); 206c6d81bd7SHeiko Stübner 207c6d81bd7SHeiko Stübner buf[0] = FRAME_START; 208c6d81bd7SHeiko Stübner buf[1] = 1; /* data size, command only */ 209c6d81bd7SHeiko Stübner buf[2] = cmd; 210c6d81bd7SHeiko Stübner 211c6d81bd7SHeiko Stübner ret = zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 212c6d81bd7SHeiko Stübner if (ret < 0) { 213c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 214c6d81bd7SHeiko Stübner return ret; 215c6d81bd7SHeiko Stübner } 216c6d81bd7SHeiko Stübner 217c6d81bd7SHeiko Stübner return 0; 218c6d81bd7SHeiko Stübner } 219c6d81bd7SHeiko Stübner 220c6d81bd7SHeiko Stübner static int zforce_resolution(struct zforce_ts *ts, u16 x, u16 y) 221c6d81bd7SHeiko Stübner { 222c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 223c6d81bd7SHeiko Stübner char buf[7] = { FRAME_START, 5, COMMAND_RESOLUTION, 224c6d81bd7SHeiko Stübner (x & 0xff), ((x >> 8) & 0xff), 225c6d81bd7SHeiko Stübner (y & 0xff), ((y >> 8) & 0xff) }; 226c6d81bd7SHeiko Stübner 227c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set resolution to (%d,%d)\n", x, y); 228c6d81bd7SHeiko Stübner 229c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 230c6d81bd7SHeiko Stübner } 231c6d81bd7SHeiko Stübner 232c6d81bd7SHeiko Stübner static int zforce_scan_frequency(struct zforce_ts *ts, u16 idle, u16 finger, 233c6d81bd7SHeiko Stübner u16 stylus) 234c6d81bd7SHeiko Stübner { 235c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 236c6d81bd7SHeiko Stübner char buf[9] = { FRAME_START, 7, COMMAND_SCANFREQ, 237c6d81bd7SHeiko Stübner (idle & 0xff), ((idle >> 8) & 0xff), 238c6d81bd7SHeiko Stübner (finger & 0xff), ((finger >> 8) & 0xff), 239c6d81bd7SHeiko Stübner (stylus & 0xff), ((stylus >> 8) & 0xff) }; 240c6d81bd7SHeiko Stübner 241ad697b96SLuis Ortega dev_dbg(&client->dev, 242ad697b96SLuis Ortega "set scan frequency to (idle: %d, finger: %d, stylus: %d)\n", 243c6d81bd7SHeiko Stübner idle, finger, stylus); 244c6d81bd7SHeiko Stübner 245c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 246c6d81bd7SHeiko Stübner } 247c6d81bd7SHeiko Stübner 248c6d81bd7SHeiko Stübner static int zforce_setconfig(struct zforce_ts *ts, char b1) 249c6d81bd7SHeiko Stübner { 250c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 251c6d81bd7SHeiko Stübner char buf[7] = { FRAME_START, 5, COMMAND_SETCONFIG, 252c6d81bd7SHeiko Stübner b1, 0, 0, 0 }; 253c6d81bd7SHeiko Stübner 254c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set config to (%d)\n", b1); 255c6d81bd7SHeiko Stübner 256c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 257c6d81bd7SHeiko Stübner } 258c6d81bd7SHeiko Stübner 259c6d81bd7SHeiko Stübner static int zforce_start(struct zforce_ts *ts) 260c6d81bd7SHeiko Stübner { 261c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 26287273364SHeiko Stübner const struct zforce_ts_platdata *pdata = ts->pdata; 263c6d81bd7SHeiko Stübner int ret; 264c6d81bd7SHeiko Stübner 265c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "starting device\n"); 266c6d81bd7SHeiko Stübner 267c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_INITIALIZE); 268c6d81bd7SHeiko Stübner if (ret) { 269c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to initialize, %d\n", ret); 270c6d81bd7SHeiko Stübner return ret; 271c6d81bd7SHeiko Stübner } 272c6d81bd7SHeiko Stübner 273c6d81bd7SHeiko Stübner ret = zforce_resolution(ts, pdata->x_max, pdata->y_max); 274c6d81bd7SHeiko Stübner if (ret) { 275c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set resolution, %d\n", ret); 276c6d81bd7SHeiko Stübner goto error; 277c6d81bd7SHeiko Stübner } 278c6d81bd7SHeiko Stübner 279c6d81bd7SHeiko Stübner ret = zforce_scan_frequency(ts, 10, 50, 50); 280c6d81bd7SHeiko Stübner if (ret) { 281c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set scan frequency, %d\n", 282c6d81bd7SHeiko Stübner ret); 283c6d81bd7SHeiko Stübner goto error; 284c6d81bd7SHeiko Stübner } 285c6d81bd7SHeiko Stübner 2863c4396b4SWei Yongjun ret = zforce_setconfig(ts, SETCONFIG_DUALTOUCH); 2873c4396b4SWei Yongjun if (ret) { 288c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set config\n"); 289c6d81bd7SHeiko Stübner goto error; 290c6d81bd7SHeiko Stübner } 291c6d81bd7SHeiko Stübner 292c6d81bd7SHeiko Stübner /* start sending touch events */ 293c6d81bd7SHeiko Stübner ret = zforce_command(ts, COMMAND_DATAREQUEST); 294c6d81bd7SHeiko Stübner if (ret) { 295c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to request data\n"); 296c6d81bd7SHeiko Stübner goto error; 297c6d81bd7SHeiko Stübner } 298c6d81bd7SHeiko Stübner 299c6d81bd7SHeiko Stübner /* 300c6d81bd7SHeiko Stübner * Per NN, initial cal. take max. of 200msec. 301c6d81bd7SHeiko Stübner * Allow time to complete this calibration 302c6d81bd7SHeiko Stübner */ 303c6d81bd7SHeiko Stübner msleep(200); 304c6d81bd7SHeiko Stübner 305c6d81bd7SHeiko Stübner return 0; 306c6d81bd7SHeiko Stübner 307c6d81bd7SHeiko Stübner error: 308c6d81bd7SHeiko Stübner zforce_command_wait(ts, COMMAND_DEACTIVATE); 309c6d81bd7SHeiko Stübner return ret; 310c6d81bd7SHeiko Stübner } 311c6d81bd7SHeiko Stübner 312c6d81bd7SHeiko Stübner static int zforce_stop(struct zforce_ts *ts) 313c6d81bd7SHeiko Stübner { 314c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 315c6d81bd7SHeiko Stübner int ret; 316c6d81bd7SHeiko Stübner 317c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "stopping device\n"); 318c6d81bd7SHeiko Stübner 319c6d81bd7SHeiko Stübner /* Deactivates touch sensing and puts the device into sleep. */ 320c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_DEACTIVATE); 321c6d81bd7SHeiko Stübner if (ret != 0) { 322c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not deactivate device, %d\n", 323c6d81bd7SHeiko Stübner ret); 324c6d81bd7SHeiko Stübner return ret; 325c6d81bd7SHeiko Stübner } 326c6d81bd7SHeiko Stübner 327c6d81bd7SHeiko Stübner return 0; 328c6d81bd7SHeiko Stübner } 329c6d81bd7SHeiko Stübner 330c6d81bd7SHeiko Stübner static int zforce_touch_event(struct zforce_ts *ts, u8 *payload) 331c6d81bd7SHeiko Stübner { 332c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 33387273364SHeiko Stübner const struct zforce_ts_platdata *pdata = ts->pdata; 334c6d81bd7SHeiko Stübner struct zforce_point point; 335c6d81bd7SHeiko Stübner int count, i, num = 0; 336c6d81bd7SHeiko Stübner 337c6d81bd7SHeiko Stübner count = payload[0]; 338c6d81bd7SHeiko Stübner if (count > ZFORCE_REPORT_POINTS) { 339ad697b96SLuis Ortega dev_warn(&client->dev, 340ad697b96SLuis Ortega "too many coordinates %d, expected max %d\n", 341c6d81bd7SHeiko Stübner count, ZFORCE_REPORT_POINTS); 342c6d81bd7SHeiko Stübner count = ZFORCE_REPORT_POINTS; 343c6d81bd7SHeiko Stübner } 344c6d81bd7SHeiko Stübner 345c6d81bd7SHeiko Stübner for (i = 0; i < count; i++) { 346c6d81bd7SHeiko Stübner point.coord_x = 347c6d81bd7SHeiko Stübner payload[9 * i + 2] << 8 | payload[9 * i + 1]; 348c6d81bd7SHeiko Stübner point.coord_y = 349c6d81bd7SHeiko Stübner payload[9 * i + 4] << 8 | payload[9 * i + 3]; 350c6d81bd7SHeiko Stübner 351c6d81bd7SHeiko Stübner if (point.coord_x > pdata->x_max || 352c6d81bd7SHeiko Stübner point.coord_y > pdata->y_max) { 353c6d81bd7SHeiko Stübner dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", 354c6d81bd7SHeiko Stübner point.coord_x, point.coord_y); 355c6d81bd7SHeiko Stübner point.coord_x = point.coord_y = 0; 356c6d81bd7SHeiko Stübner } 357c6d81bd7SHeiko Stübner 358c6d81bd7SHeiko Stübner point.state = payload[9 * i + 5] & 0x03; 359c6d81bd7SHeiko Stübner point.id = (payload[9 * i + 5] & 0xfc) >> 2; 360c6d81bd7SHeiko Stübner 361c6d81bd7SHeiko Stübner /* determine touch major, minor and orientation */ 362c6d81bd7SHeiko Stübner point.area_major = max(payload[9 * i + 6], 363c6d81bd7SHeiko Stübner payload[9 * i + 7]); 364c6d81bd7SHeiko Stübner point.area_minor = min(payload[9 * i + 6], 365c6d81bd7SHeiko Stübner payload[9 * i + 7]); 366c6d81bd7SHeiko Stübner point.orientation = payload[9 * i + 6] > payload[9 * i + 7]; 367c6d81bd7SHeiko Stübner 368c6d81bd7SHeiko Stübner point.pressure = payload[9 * i + 8]; 369c6d81bd7SHeiko Stübner point.prblty = payload[9 * i + 9]; 370c6d81bd7SHeiko Stübner 371c6d81bd7SHeiko Stübner dev_dbg(&client->dev, 372c6d81bd7SHeiko Stübner "point %d/%d: state %d, id %d, pressure %d, prblty %d, x %d, y %d, amajor %d, aminor %d, ori %d\n", 373c6d81bd7SHeiko Stübner i, count, point.state, point.id, 374c6d81bd7SHeiko Stübner point.pressure, point.prblty, 375c6d81bd7SHeiko Stübner point.coord_x, point.coord_y, 376c6d81bd7SHeiko Stübner point.area_major, point.area_minor, 377c6d81bd7SHeiko Stübner point.orientation); 378c6d81bd7SHeiko Stübner 379c6d81bd7SHeiko Stübner /* the zforce id starts with "1", so needs to be decreased */ 380c6d81bd7SHeiko Stübner input_mt_slot(ts->input, point.id - 1); 381c6d81bd7SHeiko Stübner 382c6d81bd7SHeiko Stübner input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 383c6d81bd7SHeiko Stübner point.state != STATE_UP); 384c6d81bd7SHeiko Stübner 385c6d81bd7SHeiko Stübner if (point.state != STATE_UP) { 386c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_POSITION_X, 387c6d81bd7SHeiko Stübner point.coord_x); 388c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_POSITION_Y, 389c6d81bd7SHeiko Stübner point.coord_y); 390c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 391c6d81bd7SHeiko Stübner point.area_major); 392c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 393c6d81bd7SHeiko Stübner point.area_minor); 394c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_ORIENTATION, 395c6d81bd7SHeiko Stübner point.orientation); 396c6d81bd7SHeiko Stübner num++; 397c6d81bd7SHeiko Stübner } 398c6d81bd7SHeiko Stübner } 399c6d81bd7SHeiko Stübner 400c6d81bd7SHeiko Stübner input_mt_sync_frame(ts->input); 401c6d81bd7SHeiko Stübner 402c6d81bd7SHeiko Stübner input_mt_report_finger_count(ts->input, num); 403c6d81bd7SHeiko Stübner 404c6d81bd7SHeiko Stübner input_sync(ts->input); 405c6d81bd7SHeiko Stübner 406c6d81bd7SHeiko Stübner return 0; 407c6d81bd7SHeiko Stübner } 408c6d81bd7SHeiko Stübner 409c6d81bd7SHeiko Stübner static int zforce_read_packet(struct zforce_ts *ts, u8 *buf) 410c6d81bd7SHeiko Stübner { 411c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 412c6d81bd7SHeiko Stübner int ret; 413c6d81bd7SHeiko Stübner 414c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 415c6d81bd7SHeiko Stübner 416c6d81bd7SHeiko Stübner /* read 2 byte message header */ 417c6d81bd7SHeiko Stübner ret = i2c_master_recv(client, buf, 2); 418c6d81bd7SHeiko Stübner if (ret < 0) { 419c6d81bd7SHeiko Stübner dev_err(&client->dev, "error reading header: %d\n", ret); 420c6d81bd7SHeiko Stübner goto unlock; 421c6d81bd7SHeiko Stübner } 422c6d81bd7SHeiko Stübner 423c6d81bd7SHeiko Stübner if (buf[PAYLOAD_HEADER] != FRAME_START) { 424c6d81bd7SHeiko Stübner dev_err(&client->dev, "invalid frame start: %d\n", buf[0]); 425c6d81bd7SHeiko Stübner ret = -EIO; 426c6d81bd7SHeiko Stübner goto unlock; 427c6d81bd7SHeiko Stübner } 428c6d81bd7SHeiko Stübner 4295aee41a6SLuis Ortega if (buf[PAYLOAD_LENGTH] == 0) { 430c6d81bd7SHeiko Stübner dev_err(&client->dev, "invalid payload length: %d\n", 431c6d81bd7SHeiko Stübner buf[PAYLOAD_LENGTH]); 432c6d81bd7SHeiko Stübner ret = -EIO; 433c6d81bd7SHeiko Stübner goto unlock; 434c6d81bd7SHeiko Stübner } 435c6d81bd7SHeiko Stübner 436c6d81bd7SHeiko Stübner /* read the message */ 437c6d81bd7SHeiko Stübner ret = i2c_master_recv(client, &buf[PAYLOAD_BODY], buf[PAYLOAD_LENGTH]); 438c6d81bd7SHeiko Stübner if (ret < 0) { 439c6d81bd7SHeiko Stübner dev_err(&client->dev, "error reading payload: %d\n", ret); 440c6d81bd7SHeiko Stübner goto unlock; 441c6d81bd7SHeiko Stübner } 442c6d81bd7SHeiko Stübner 443c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "read %d bytes for response command 0x%x\n", 444c6d81bd7SHeiko Stübner buf[PAYLOAD_LENGTH], buf[PAYLOAD_BODY]); 445c6d81bd7SHeiko Stübner 446c6d81bd7SHeiko Stübner unlock: 447c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 448c6d81bd7SHeiko Stübner return ret; 449c6d81bd7SHeiko Stübner } 450c6d81bd7SHeiko Stübner 451c6d81bd7SHeiko Stübner static void zforce_complete(struct zforce_ts *ts, int cmd, int result) 452c6d81bd7SHeiko Stübner { 453c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 454c6d81bd7SHeiko Stübner 455c6d81bd7SHeiko Stübner if (ts->command_waiting == cmd) { 456c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "completing command 0x%x\n", cmd); 457c6d81bd7SHeiko Stübner ts->command_result = result; 458c6d81bd7SHeiko Stübner complete(&ts->command_done); 459c6d81bd7SHeiko Stübner } else { 460c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "command %d not for us\n", cmd); 461c6d81bd7SHeiko Stübner } 462c6d81bd7SHeiko Stübner } 463c6d81bd7SHeiko Stübner 464499e6127SHeiko Stübner static irqreturn_t zforce_irq(int irq, void *dev_id) 465499e6127SHeiko Stübner { 466499e6127SHeiko Stübner struct zforce_ts *ts = dev_id; 467499e6127SHeiko Stübner struct i2c_client *client = ts->client; 468499e6127SHeiko Stübner 469499e6127SHeiko Stübner if (ts->suspended && device_may_wakeup(&client->dev)) 470499e6127SHeiko Stübner pm_wakeup_event(&client->dev, 500); 471499e6127SHeiko Stübner 472499e6127SHeiko Stübner return IRQ_WAKE_THREAD; 473499e6127SHeiko Stübner } 474499e6127SHeiko Stübner 475499e6127SHeiko Stübner static irqreturn_t zforce_irq_thread(int irq, void *dev_id) 476c6d81bd7SHeiko Stübner { 477c6d81bd7SHeiko Stübner struct zforce_ts *ts = dev_id; 478c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 47987273364SHeiko Stübner const struct zforce_ts_platdata *pdata = ts->pdata; 480c6d81bd7SHeiko Stübner int ret; 481d333b606SLuis Ortega u8 payload_buffer[FRAME_MAXSIZE]; 482c6d81bd7SHeiko Stübner u8 *payload; 483c6d81bd7SHeiko Stübner 484c6d81bd7SHeiko Stübner /* 485499e6127SHeiko Stübner * When still suspended, return. 486c6d81bd7SHeiko Stübner * Due to the level-interrupt we will get re-triggered later. 487c6d81bd7SHeiko Stübner */ 488c6d81bd7SHeiko Stübner if (ts->suspended) { 489c6d81bd7SHeiko Stübner msleep(20); 490c6d81bd7SHeiko Stübner return IRQ_HANDLED; 491c6d81bd7SHeiko Stübner } 492c6d81bd7SHeiko Stübner 493c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "handling interrupt\n"); 494c6d81bd7SHeiko Stübner 495c6d81bd7SHeiko Stübner /* Don't emit wakeup events from commands run by zforce_suspend */ 496c6d81bd7SHeiko Stübner if (!ts->suspending && device_may_wakeup(&client->dev)) 497c6d81bd7SHeiko Stübner pm_stay_awake(&client->dev); 498c6d81bd7SHeiko Stübner 499c6d81bd7SHeiko Stübner while (!gpio_get_value(pdata->gpio_int)) { 500c6d81bd7SHeiko Stübner ret = zforce_read_packet(ts, payload_buffer); 501c6d81bd7SHeiko Stübner if (ret < 0) { 502ad697b96SLuis Ortega dev_err(&client->dev, 503ad697b96SLuis Ortega "could not read packet, ret: %d\n", ret); 504c6d81bd7SHeiko Stübner break; 505c6d81bd7SHeiko Stübner } 506c6d81bd7SHeiko Stübner 507c6d81bd7SHeiko Stübner payload = &payload_buffer[PAYLOAD_BODY]; 508c6d81bd7SHeiko Stübner 509c6d81bd7SHeiko Stübner switch (payload[RESPONSE_ID]) { 510c6d81bd7SHeiko Stübner case NOTIFICATION_TOUCH: 511c6d81bd7SHeiko Stübner /* 512c6d81bd7SHeiko Stübner * Always report touch-events received while 513c6d81bd7SHeiko Stübner * suspending, when being a wakeup source 514c6d81bd7SHeiko Stübner */ 515c6d81bd7SHeiko Stübner if (ts->suspending && device_may_wakeup(&client->dev)) 516c6d81bd7SHeiko Stübner pm_wakeup_event(&client->dev, 500); 517c6d81bd7SHeiko Stübner zforce_touch_event(ts, &payload[RESPONSE_DATA]); 518c6d81bd7SHeiko Stübner break; 519c6d81bd7SHeiko Stübner 520c6d81bd7SHeiko Stübner case NOTIFICATION_BOOTCOMPLETE: 521c6d81bd7SHeiko Stübner ts->boot_complete = payload[RESPONSE_DATA]; 522c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 0); 523c6d81bd7SHeiko Stübner break; 524c6d81bd7SHeiko Stübner 525c6d81bd7SHeiko Stübner case RESPONSE_INITIALIZE: 526c6d81bd7SHeiko Stübner case RESPONSE_DEACTIVATE: 527c6d81bd7SHeiko Stübner case RESPONSE_SETCONFIG: 528c6d81bd7SHeiko Stübner case RESPONSE_RESOLUTION: 529c6d81bd7SHeiko Stübner case RESPONSE_SCANFREQ: 530c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 531c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]); 532c6d81bd7SHeiko Stübner break; 533c6d81bd7SHeiko Stübner 534c6d81bd7SHeiko Stübner case RESPONSE_STATUS: 535c6d81bd7SHeiko Stübner /* 536c6d81bd7SHeiko Stübner * Version Payload Results 537c6d81bd7SHeiko Stübner * [2:major] [2:minor] [2:build] [2:rev] 538c6d81bd7SHeiko Stübner */ 539c6d81bd7SHeiko Stübner ts->version_major = (payload[RESPONSE_DATA + 1] << 8) | 540c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]; 541c6d81bd7SHeiko Stübner ts->version_minor = (payload[RESPONSE_DATA + 3] << 8) | 542c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 2]; 543c6d81bd7SHeiko Stübner ts->version_build = (payload[RESPONSE_DATA + 5] << 8) | 544c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 4]; 545c6d81bd7SHeiko Stübner ts->version_rev = (payload[RESPONSE_DATA + 7] << 8) | 546c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 6]; 547ad697b96SLuis Ortega dev_dbg(&ts->client->dev, 548ad697b96SLuis Ortega "Firmware Version %04x:%04x %04x:%04x\n", 549c6d81bd7SHeiko Stübner ts->version_major, ts->version_minor, 550c6d81bd7SHeiko Stübner ts->version_build, ts->version_rev); 551c6d81bd7SHeiko Stübner 552c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 0); 553c6d81bd7SHeiko Stübner break; 554c6d81bd7SHeiko Stübner 555c6d81bd7SHeiko Stübner case NOTIFICATION_INVALID_COMMAND: 556c6d81bd7SHeiko Stübner dev_err(&ts->client->dev, "invalid command: 0x%x\n", 557c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]); 558c6d81bd7SHeiko Stübner break; 559c6d81bd7SHeiko Stübner 560c6d81bd7SHeiko Stübner default: 561ad697b96SLuis Ortega dev_err(&ts->client->dev, 562ad697b96SLuis Ortega "unrecognized response id: 0x%x\n", 563c6d81bd7SHeiko Stübner payload[RESPONSE_ID]); 564c6d81bd7SHeiko Stübner break; 565c6d81bd7SHeiko Stübner } 566c6d81bd7SHeiko Stübner } 567c6d81bd7SHeiko Stübner 568c6d81bd7SHeiko Stübner if (!ts->suspending && device_may_wakeup(&client->dev)) 569c6d81bd7SHeiko Stübner pm_relax(&client->dev); 570c6d81bd7SHeiko Stübner 571c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "finished interrupt\n"); 572c6d81bd7SHeiko Stübner 573c6d81bd7SHeiko Stübner return IRQ_HANDLED; 574c6d81bd7SHeiko Stübner } 575c6d81bd7SHeiko Stübner 576c6d81bd7SHeiko Stübner static int zforce_input_open(struct input_dev *dev) 577c6d81bd7SHeiko Stübner { 578c6d81bd7SHeiko Stübner struct zforce_ts *ts = input_get_drvdata(dev); 579c6d81bd7SHeiko Stübner int ret; 580c6d81bd7SHeiko Stübner 581c6d81bd7SHeiko Stübner ret = zforce_start(ts); 582c6d81bd7SHeiko Stübner if (ret) 583c6d81bd7SHeiko Stübner return ret; 584c6d81bd7SHeiko Stübner 585c6d81bd7SHeiko Stübner return 0; 586c6d81bd7SHeiko Stübner } 587c6d81bd7SHeiko Stübner 588c6d81bd7SHeiko Stübner static void zforce_input_close(struct input_dev *dev) 589c6d81bd7SHeiko Stübner { 590c6d81bd7SHeiko Stübner struct zforce_ts *ts = input_get_drvdata(dev); 591c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 592c6d81bd7SHeiko Stübner int ret; 593c6d81bd7SHeiko Stübner 594c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 595c6d81bd7SHeiko Stübner if (ret) 596c6d81bd7SHeiko Stübner dev_warn(&client->dev, "stopping zforce failed\n"); 597c6d81bd7SHeiko Stübner 598c6d81bd7SHeiko Stübner return; 599c6d81bd7SHeiko Stübner } 600c6d81bd7SHeiko Stübner 601c6d81bd7SHeiko Stübner #ifdef CONFIG_PM_SLEEP 602c6d81bd7SHeiko Stübner static int zforce_suspend(struct device *dev) 603c6d81bd7SHeiko Stübner { 604c6d81bd7SHeiko Stübner struct i2c_client *client = to_i2c_client(dev); 605c6d81bd7SHeiko Stübner struct zforce_ts *ts = i2c_get_clientdata(client); 606c6d81bd7SHeiko Stübner struct input_dev *input = ts->input; 607c6d81bd7SHeiko Stübner int ret = 0; 608c6d81bd7SHeiko Stübner 609c6d81bd7SHeiko Stübner mutex_lock(&input->mutex); 610c6d81bd7SHeiko Stübner ts->suspending = true; 611c6d81bd7SHeiko Stübner 612c6d81bd7SHeiko Stübner /* 613c6d81bd7SHeiko Stübner * When configured as a wakeup source device should always wake 614c6d81bd7SHeiko Stübner * the system, therefore start device if necessary. 615c6d81bd7SHeiko Stübner */ 616c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) { 617c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "suspend while being a wakeup source\n"); 618c6d81bd7SHeiko Stübner 619c6d81bd7SHeiko Stübner /* Need to start device, if not open, to be a wakeup source. */ 620c6d81bd7SHeiko Stübner if (!input->users) { 621c6d81bd7SHeiko Stübner ret = zforce_start(ts); 622c6d81bd7SHeiko Stübner if (ret) 623c6d81bd7SHeiko Stübner goto unlock; 624c6d81bd7SHeiko Stübner } 625c6d81bd7SHeiko Stübner 626c6d81bd7SHeiko Stübner enable_irq_wake(client->irq); 627c6d81bd7SHeiko Stübner } else if (input->users) { 628ad697b96SLuis Ortega dev_dbg(&client->dev, 629ad697b96SLuis Ortega "suspend without being a wakeup source\n"); 630c6d81bd7SHeiko Stübner 631c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 632c6d81bd7SHeiko Stübner if (ret) 633c6d81bd7SHeiko Stübner goto unlock; 634c6d81bd7SHeiko Stübner 635c6d81bd7SHeiko Stübner disable_irq(client->irq); 636c6d81bd7SHeiko Stübner } 637c6d81bd7SHeiko Stübner 638c6d81bd7SHeiko Stübner ts->suspended = true; 639c6d81bd7SHeiko Stübner 640c6d81bd7SHeiko Stübner unlock: 641c6d81bd7SHeiko Stübner ts->suspending = false; 642c6d81bd7SHeiko Stübner mutex_unlock(&input->mutex); 643c6d81bd7SHeiko Stübner 644c6d81bd7SHeiko Stübner return ret; 645c6d81bd7SHeiko Stübner } 646c6d81bd7SHeiko Stübner 647c6d81bd7SHeiko Stübner static int zforce_resume(struct device *dev) 648c6d81bd7SHeiko Stübner { 649c6d81bd7SHeiko Stübner struct i2c_client *client = to_i2c_client(dev); 650c6d81bd7SHeiko Stübner struct zforce_ts *ts = i2c_get_clientdata(client); 651c6d81bd7SHeiko Stübner struct input_dev *input = ts->input; 652c6d81bd7SHeiko Stübner int ret = 0; 653c6d81bd7SHeiko Stübner 654c6d81bd7SHeiko Stübner mutex_lock(&input->mutex); 655c6d81bd7SHeiko Stübner 656c6d81bd7SHeiko Stübner ts->suspended = false; 657c6d81bd7SHeiko Stübner 658c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) { 659c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "resume from being a wakeup source\n"); 660c6d81bd7SHeiko Stübner 661c6d81bd7SHeiko Stübner disable_irq_wake(client->irq); 662c6d81bd7SHeiko Stübner 663c6d81bd7SHeiko Stübner /* need to stop device if it was not open on suspend */ 664c6d81bd7SHeiko Stübner if (!input->users) { 665c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 666c6d81bd7SHeiko Stübner if (ret) 667c6d81bd7SHeiko Stübner goto unlock; 668c6d81bd7SHeiko Stübner } 669c6d81bd7SHeiko Stübner } else if (input->users) { 670c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "resume without being a wakeup source\n"); 671c6d81bd7SHeiko Stübner 672c6d81bd7SHeiko Stübner enable_irq(client->irq); 673c6d81bd7SHeiko Stübner 674c6d81bd7SHeiko Stübner ret = zforce_start(ts); 675c6d81bd7SHeiko Stübner if (ret < 0) 676c6d81bd7SHeiko Stübner goto unlock; 677c6d81bd7SHeiko Stübner } 678c6d81bd7SHeiko Stübner 679c6d81bd7SHeiko Stübner unlock: 680c6d81bd7SHeiko Stübner mutex_unlock(&input->mutex); 681c6d81bd7SHeiko Stübner 682c6d81bd7SHeiko Stübner return ret; 683c6d81bd7SHeiko Stübner } 684c6d81bd7SHeiko Stübner #endif 685c6d81bd7SHeiko Stübner 686c6d81bd7SHeiko Stübner static SIMPLE_DEV_PM_OPS(zforce_pm_ops, zforce_suspend, zforce_resume); 687c6d81bd7SHeiko Stübner 688c6d81bd7SHeiko Stübner static void zforce_reset(void *data) 689c6d81bd7SHeiko Stübner { 690c6d81bd7SHeiko Stübner struct zforce_ts *ts = data; 691c6d81bd7SHeiko Stübner 692c6d81bd7SHeiko Stübner gpio_set_value(ts->pdata->gpio_rst, 0); 693c6d81bd7SHeiko Stübner } 694c6d81bd7SHeiko Stübner 6956f2e6c9bSHeiko Stübner static struct zforce_ts_platdata *zforce_parse_dt(struct device *dev) 6966f2e6c9bSHeiko Stübner { 6976f2e6c9bSHeiko Stübner struct zforce_ts_platdata *pdata; 6986f2e6c9bSHeiko Stübner struct device_node *np = dev->of_node; 6996f2e6c9bSHeiko Stübner 7006f2e6c9bSHeiko Stübner if (!np) 7016f2e6c9bSHeiko Stübner return ERR_PTR(-ENOENT); 7026f2e6c9bSHeiko Stübner 7036f2e6c9bSHeiko Stübner pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 7046f2e6c9bSHeiko Stübner if (!pdata) { 7056f2e6c9bSHeiko Stübner dev_err(dev, "failed to allocate platform data\n"); 7066f2e6c9bSHeiko Stübner return ERR_PTR(-ENOMEM); 7076f2e6c9bSHeiko Stübner } 7086f2e6c9bSHeiko Stübner 7096f2e6c9bSHeiko Stübner pdata->gpio_int = of_get_gpio(np, 0); 7106f2e6c9bSHeiko Stübner if (!gpio_is_valid(pdata->gpio_int)) { 7116f2e6c9bSHeiko Stübner dev_err(dev, "failed to get interrupt gpio\n"); 7126f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7136f2e6c9bSHeiko Stübner } 7146f2e6c9bSHeiko Stübner 7156f2e6c9bSHeiko Stübner pdata->gpio_rst = of_get_gpio(np, 1); 7166f2e6c9bSHeiko Stübner if (!gpio_is_valid(pdata->gpio_rst)) { 7176f2e6c9bSHeiko Stübner dev_err(dev, "failed to get reset gpio\n"); 7186f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7196f2e6c9bSHeiko Stübner } 7206f2e6c9bSHeiko Stübner 7216f2e6c9bSHeiko Stübner if (of_property_read_u32(np, "x-size", &pdata->x_max)) { 7226f2e6c9bSHeiko Stübner dev_err(dev, "failed to get x-size property\n"); 7236f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7246f2e6c9bSHeiko Stübner } 7256f2e6c9bSHeiko Stübner 7266f2e6c9bSHeiko Stübner if (of_property_read_u32(np, "y-size", &pdata->y_max)) { 7276f2e6c9bSHeiko Stübner dev_err(dev, "failed to get y-size property\n"); 7286f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7296f2e6c9bSHeiko Stübner } 7306f2e6c9bSHeiko Stübner 7316f2e6c9bSHeiko Stübner return pdata; 7326f2e6c9bSHeiko Stübner } 7336f2e6c9bSHeiko Stübner 734c6d81bd7SHeiko Stübner static int zforce_probe(struct i2c_client *client, 735c6d81bd7SHeiko Stübner const struct i2c_device_id *id) 736c6d81bd7SHeiko Stübner { 737c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); 738c6d81bd7SHeiko Stübner struct zforce_ts *ts; 739c6d81bd7SHeiko Stübner struct input_dev *input_dev; 740c6d81bd7SHeiko Stübner int ret; 741c6d81bd7SHeiko Stübner 7426f2e6c9bSHeiko Stübner if (!pdata) { 7436f2e6c9bSHeiko Stübner pdata = zforce_parse_dt(&client->dev); 7446f2e6c9bSHeiko Stübner if (IS_ERR(pdata)) 7456f2e6c9bSHeiko Stübner return PTR_ERR(pdata); 7466f2e6c9bSHeiko Stübner } 747c6d81bd7SHeiko Stübner 748c6d81bd7SHeiko Stübner ts = devm_kzalloc(&client->dev, sizeof(struct zforce_ts), GFP_KERNEL); 749c6d81bd7SHeiko Stübner if (!ts) 750c6d81bd7SHeiko Stübner return -ENOMEM; 751c6d81bd7SHeiko Stübner 752c6d81bd7SHeiko Stübner ret = devm_gpio_request_one(&client->dev, pdata->gpio_int, GPIOF_IN, 753c6d81bd7SHeiko Stübner "zforce_ts_int"); 754c6d81bd7SHeiko Stübner if (ret) { 755c6d81bd7SHeiko Stübner dev_err(&client->dev, "request of gpio %d failed, %d\n", 756c6d81bd7SHeiko Stübner pdata->gpio_int, ret); 757c6d81bd7SHeiko Stübner return ret; 758c6d81bd7SHeiko Stübner } 759c6d81bd7SHeiko Stübner 760c6d81bd7SHeiko Stübner ret = devm_gpio_request_one(&client->dev, pdata->gpio_rst, 761c6d81bd7SHeiko Stübner GPIOF_OUT_INIT_LOW, "zforce_ts_rst"); 762c6d81bd7SHeiko Stübner if (ret) { 763c6d81bd7SHeiko Stübner dev_err(&client->dev, "request of gpio %d failed, %d\n", 764c6d81bd7SHeiko Stübner pdata->gpio_rst, ret); 765c6d81bd7SHeiko Stübner return ret; 766c6d81bd7SHeiko Stübner } 767c6d81bd7SHeiko Stübner 768c6d81bd7SHeiko Stübner ret = devm_add_action(&client->dev, zforce_reset, ts); 769c6d81bd7SHeiko Stübner if (ret) { 770c6d81bd7SHeiko Stübner dev_err(&client->dev, "failed to register reset action, %d\n", 771c6d81bd7SHeiko Stübner ret); 772c6d81bd7SHeiko Stübner return ret; 773c6d81bd7SHeiko Stübner } 774c6d81bd7SHeiko Stübner 775c6d81bd7SHeiko Stübner snprintf(ts->phys, sizeof(ts->phys), 776c6d81bd7SHeiko Stübner "%s/input0", dev_name(&client->dev)); 777c6d81bd7SHeiko Stübner 778c6d81bd7SHeiko Stübner input_dev = devm_input_allocate_device(&client->dev); 779c6d81bd7SHeiko Stübner if (!input_dev) { 780c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not allocate input device\n"); 781c6d81bd7SHeiko Stübner return -ENOMEM; 782c6d81bd7SHeiko Stübner } 783c6d81bd7SHeiko Stübner 784c6d81bd7SHeiko Stübner mutex_init(&ts->access_mutex); 785c6d81bd7SHeiko Stübner mutex_init(&ts->command_mutex); 786c6d81bd7SHeiko Stübner 787c6d81bd7SHeiko Stübner ts->pdata = pdata; 788c6d81bd7SHeiko Stübner ts->client = client; 789c6d81bd7SHeiko Stübner ts->input = input_dev; 790c6d81bd7SHeiko Stübner 791c6d81bd7SHeiko Stübner input_dev->name = "Neonode zForce touchscreen"; 792c6d81bd7SHeiko Stübner input_dev->phys = ts->phys; 793c6d81bd7SHeiko Stübner input_dev->id.bustype = BUS_I2C; 794c6d81bd7SHeiko Stübner 795c6d81bd7SHeiko Stübner input_dev->open = zforce_input_open; 796c6d81bd7SHeiko Stübner input_dev->close = zforce_input_close; 797c6d81bd7SHeiko Stübner 798c6d81bd7SHeiko Stübner __set_bit(EV_KEY, input_dev->evbit); 799c6d81bd7SHeiko Stübner __set_bit(EV_SYN, input_dev->evbit); 800c6d81bd7SHeiko Stübner __set_bit(EV_ABS, input_dev->evbit); 801c6d81bd7SHeiko Stübner 802c6d81bd7SHeiko Stübner /* For multi touch */ 803c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 804c6d81bd7SHeiko Stübner pdata->x_max, 0, 0); 805c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 806c6d81bd7SHeiko Stübner pdata->y_max, 0, 0); 807c6d81bd7SHeiko Stübner 808c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 809c6d81bd7SHeiko Stübner ZFORCE_MAX_AREA, 0, 0); 810c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 811c6d81bd7SHeiko Stübner ZFORCE_MAX_AREA, 0, 0); 812c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); 813c6d81bd7SHeiko Stübner input_mt_init_slots(input_dev, ZFORCE_REPORT_POINTS, INPUT_MT_DIRECT); 814c6d81bd7SHeiko Stübner 815c6d81bd7SHeiko Stübner input_set_drvdata(ts->input, ts); 816c6d81bd7SHeiko Stübner 817c6d81bd7SHeiko Stübner init_completion(&ts->command_done); 818c6d81bd7SHeiko Stübner 819c6d81bd7SHeiko Stübner /* 820c6d81bd7SHeiko Stübner * The zforce pulls the interrupt low when it has data ready. 821c6d81bd7SHeiko Stübner * After it is triggered the isr thread runs until all the available 822c6d81bd7SHeiko Stübner * packets have been read and the interrupt is high again. 823c6d81bd7SHeiko Stübner * Therefore we can trigger the interrupt anytime it is low and do 824c6d81bd7SHeiko Stübner * not need to limit it to the interrupt edge. 825c6d81bd7SHeiko Stübner */ 826499e6127SHeiko Stübner ret = devm_request_threaded_irq(&client->dev, client->irq, 827499e6127SHeiko Stübner zforce_irq, zforce_irq_thread, 828c6d81bd7SHeiko Stübner IRQF_TRIGGER_LOW | IRQF_ONESHOT, 829c6d81bd7SHeiko Stübner input_dev->name, ts); 830c6d81bd7SHeiko Stübner if (ret) { 831c6d81bd7SHeiko Stübner dev_err(&client->dev, "irq %d request failed\n", client->irq); 832c6d81bd7SHeiko Stübner return ret; 833c6d81bd7SHeiko Stübner } 834c6d81bd7SHeiko Stübner 835c6d81bd7SHeiko Stübner i2c_set_clientdata(client, ts); 836c6d81bd7SHeiko Stübner 837c6d81bd7SHeiko Stübner /* let the controller boot */ 838c6d81bd7SHeiko Stübner gpio_set_value(pdata->gpio_rst, 1); 839c6d81bd7SHeiko Stübner 840c6d81bd7SHeiko Stübner ts->command_waiting = NOTIFICATION_BOOTCOMPLETE; 841c6d81bd7SHeiko Stübner if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) 842c6d81bd7SHeiko Stübner dev_warn(&client->dev, "bootcomplete timed out\n"); 843c6d81bd7SHeiko Stübner 844c6d81bd7SHeiko Stübner /* need to start device to get version information */ 845c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_INITIALIZE); 846c6d81bd7SHeiko Stübner if (ret) { 847c6d81bd7SHeiko Stübner dev_err(&client->dev, "unable to initialize, %d\n", ret); 848c6d81bd7SHeiko Stübner return ret; 849c6d81bd7SHeiko Stübner } 850c6d81bd7SHeiko Stübner 851deb49819SLuis Ortega /* this gets the firmware version among other information */ 852c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_STATUS); 853c6d81bd7SHeiko Stübner if (ret < 0) { 854c6d81bd7SHeiko Stübner dev_err(&client->dev, "couldn't get status, %d\n", ret); 855c6d81bd7SHeiko Stübner zforce_stop(ts); 856c6d81bd7SHeiko Stübner return ret; 857c6d81bd7SHeiko Stübner } 858c6d81bd7SHeiko Stübner 859c6d81bd7SHeiko Stübner /* stop device and put it into sleep until it is opened */ 860c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 861c6d81bd7SHeiko Stübner if (ret < 0) 862c6d81bd7SHeiko Stübner return ret; 863c6d81bd7SHeiko Stübner 864c6d81bd7SHeiko Stübner device_set_wakeup_capable(&client->dev, true); 865c6d81bd7SHeiko Stübner 866c6d81bd7SHeiko Stübner ret = input_register_device(input_dev); 867c6d81bd7SHeiko Stübner if (ret) { 868c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not register input device, %d\n", 869c6d81bd7SHeiko Stübner ret); 870c6d81bd7SHeiko Stübner return ret; 871c6d81bd7SHeiko Stübner } 872c6d81bd7SHeiko Stübner 873c6d81bd7SHeiko Stübner return 0; 874c6d81bd7SHeiko Stübner } 875c6d81bd7SHeiko Stübner 876c6d81bd7SHeiko Stübner static struct i2c_device_id zforce_idtable[] = { 877c6d81bd7SHeiko Stübner { "zforce-ts", 0 }, 878c6d81bd7SHeiko Stübner { } 879c6d81bd7SHeiko Stübner }; 880c6d81bd7SHeiko Stübner MODULE_DEVICE_TABLE(i2c, zforce_idtable); 881c6d81bd7SHeiko Stübner 8826f2e6c9bSHeiko Stübner #ifdef CONFIG_OF 883f3f63193SJingoo Han static const struct of_device_id zforce_dt_idtable[] = { 8846f2e6c9bSHeiko Stübner { .compatible = "neonode,zforce" }, 8856f2e6c9bSHeiko Stübner {}, 8866f2e6c9bSHeiko Stübner }; 8876f2e6c9bSHeiko Stübner MODULE_DEVICE_TABLE(of, zforce_dt_idtable); 8886f2e6c9bSHeiko Stübner #endif 8896f2e6c9bSHeiko Stübner 890c6d81bd7SHeiko Stübner static struct i2c_driver zforce_driver = { 891c6d81bd7SHeiko Stübner .driver = { 892c6d81bd7SHeiko Stübner .owner = THIS_MODULE, 893c6d81bd7SHeiko Stübner .name = "zforce-ts", 894c6d81bd7SHeiko Stübner .pm = &zforce_pm_ops, 8956f2e6c9bSHeiko Stübner .of_match_table = of_match_ptr(zforce_dt_idtable), 896c6d81bd7SHeiko Stübner }, 897c6d81bd7SHeiko Stübner .probe = zforce_probe, 898c6d81bd7SHeiko Stübner .id_table = zforce_idtable, 899c6d81bd7SHeiko Stübner }; 900c6d81bd7SHeiko Stübner 901c6d81bd7SHeiko Stübner module_i2c_driver(zforce_driver); 902c6d81bd7SHeiko Stübner 903c6d81bd7SHeiko Stübner MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); 904c6d81bd7SHeiko Stübner MODULE_DESCRIPTION("zForce TouchScreen Driver"); 905c6d81bd7SHeiko Stübner MODULE_LICENSE("GPL"); 906