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> 32c6d81bd7SHeiko Stübner 33c6d81bd7SHeiko Stübner #define WAIT_TIMEOUT msecs_to_jiffies(1000) 34c6d81bd7SHeiko Stübner 35c6d81bd7SHeiko Stübner #define FRAME_START 0xee 36c6d81bd7SHeiko Stübner 37c6d81bd7SHeiko Stübner /* Offsets of the different parts of the payload the controller sends */ 38c6d81bd7SHeiko Stübner #define PAYLOAD_HEADER 0 39c6d81bd7SHeiko Stübner #define PAYLOAD_LENGTH 1 40c6d81bd7SHeiko Stübner #define PAYLOAD_BODY 2 41c6d81bd7SHeiko Stübner 42c6d81bd7SHeiko Stübner /* Response offsets */ 43c6d81bd7SHeiko Stübner #define RESPONSE_ID 0 44c6d81bd7SHeiko Stübner #define RESPONSE_DATA 1 45c6d81bd7SHeiko Stübner 46c6d81bd7SHeiko Stübner /* Commands */ 47c6d81bd7SHeiko Stübner #define COMMAND_DEACTIVATE 0x00 48c6d81bd7SHeiko Stübner #define COMMAND_INITIALIZE 0x01 49c6d81bd7SHeiko Stübner #define COMMAND_RESOLUTION 0x02 50c6d81bd7SHeiko Stübner #define COMMAND_SETCONFIG 0x03 51c6d81bd7SHeiko Stübner #define COMMAND_DATAREQUEST 0x04 52c6d81bd7SHeiko Stübner #define COMMAND_SCANFREQ 0x08 53c6d81bd7SHeiko Stübner #define COMMAND_STATUS 0X1e 54c6d81bd7SHeiko Stübner 55c6d81bd7SHeiko Stübner /* 56c6d81bd7SHeiko Stübner * Responses the controller sends as a result of 57c6d81bd7SHeiko Stübner * command requests 58c6d81bd7SHeiko Stübner */ 59c6d81bd7SHeiko Stübner #define RESPONSE_DEACTIVATE 0x00 60c6d81bd7SHeiko Stübner #define RESPONSE_INITIALIZE 0x01 61c6d81bd7SHeiko Stübner #define RESPONSE_RESOLUTION 0x02 62c6d81bd7SHeiko Stübner #define RESPONSE_SETCONFIG 0x03 63c6d81bd7SHeiko Stübner #define RESPONSE_SCANFREQ 0x08 64c6d81bd7SHeiko Stübner #define RESPONSE_STATUS 0X1e 65c6d81bd7SHeiko Stübner 66c6d81bd7SHeiko Stübner /* 67c6d81bd7SHeiko Stübner * Notifications are send by the touch controller without 68c6d81bd7SHeiko Stübner * being requested by the driver and include for example 69c6d81bd7SHeiko Stübner * touch indications 70c6d81bd7SHeiko Stübner */ 71c6d81bd7SHeiko Stübner #define NOTIFICATION_TOUCH 0x04 72c6d81bd7SHeiko Stübner #define NOTIFICATION_BOOTCOMPLETE 0x07 73c6d81bd7SHeiko Stübner #define NOTIFICATION_OVERRUN 0x25 74c6d81bd7SHeiko Stübner #define NOTIFICATION_PROXIMITY 0x26 75c6d81bd7SHeiko Stübner #define NOTIFICATION_INVALID_COMMAND 0xfe 76c6d81bd7SHeiko Stübner 77c6d81bd7SHeiko Stübner #define ZFORCE_REPORT_POINTS 2 78c6d81bd7SHeiko Stübner #define ZFORCE_MAX_AREA 0xff 79c6d81bd7SHeiko Stübner 80c6d81bd7SHeiko Stübner #define STATE_DOWN 0 81c6d81bd7SHeiko Stübner #define STATE_MOVE 1 82c6d81bd7SHeiko Stübner #define STATE_UP 2 83c6d81bd7SHeiko Stübner 84c6d81bd7SHeiko Stübner #define SETCONFIG_DUALTOUCH (1 << 0) 85c6d81bd7SHeiko Stübner 86c6d81bd7SHeiko Stübner struct zforce_point { 87c6d81bd7SHeiko Stübner int coord_x; 88c6d81bd7SHeiko Stübner int coord_y; 89c6d81bd7SHeiko Stübner int state; 90c6d81bd7SHeiko Stübner int id; 91c6d81bd7SHeiko Stübner int area_major; 92c6d81bd7SHeiko Stübner int area_minor; 93c6d81bd7SHeiko Stübner int orientation; 94c6d81bd7SHeiko Stübner int pressure; 95c6d81bd7SHeiko Stübner int prblty; 96c6d81bd7SHeiko Stübner }; 97c6d81bd7SHeiko Stübner 98c6d81bd7SHeiko Stübner /* 99c6d81bd7SHeiko Stübner * @client the i2c_client 100c6d81bd7SHeiko Stübner * @input the input device 101c6d81bd7SHeiko Stübner * @suspending in the process of going to suspend (don't emit wakeup 102c6d81bd7SHeiko Stübner * events for commands executed to suspend the device) 103c6d81bd7SHeiko Stübner * @suspended device suspended 104c6d81bd7SHeiko Stübner * @access_mutex serialize i2c-access, to keep multipart reads together 105c6d81bd7SHeiko Stübner * @command_done completion to wait for the command result 106c6d81bd7SHeiko Stübner * @command_mutex serialize commands send to the ic 107c6d81bd7SHeiko Stübner * @command_waiting the id of the command that that is currently waiting 108c6d81bd7SHeiko Stübner * for a result 109c6d81bd7SHeiko Stübner * @command_result returned result of the command 110c6d81bd7SHeiko Stübner */ 111c6d81bd7SHeiko Stübner struct zforce_ts { 112c6d81bd7SHeiko Stübner struct i2c_client *client; 113c6d81bd7SHeiko Stübner struct input_dev *input; 114c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata; 115c6d81bd7SHeiko Stübner char phys[32]; 116c6d81bd7SHeiko Stübner 117c6d81bd7SHeiko Stübner bool suspending; 118c6d81bd7SHeiko Stübner bool suspended; 119c6d81bd7SHeiko Stübner bool boot_complete; 120c6d81bd7SHeiko Stübner 121c6d81bd7SHeiko Stübner /* Firmware version information */ 122c6d81bd7SHeiko Stübner u16 version_major; 123c6d81bd7SHeiko Stübner u16 version_minor; 124c6d81bd7SHeiko Stübner u16 version_build; 125c6d81bd7SHeiko Stübner u16 version_rev; 126c6d81bd7SHeiko Stübner 127c6d81bd7SHeiko Stübner struct mutex access_mutex; 128c6d81bd7SHeiko Stübner 129c6d81bd7SHeiko Stübner struct completion command_done; 130c6d81bd7SHeiko Stübner struct mutex command_mutex; 131c6d81bd7SHeiko Stübner int command_waiting; 132c6d81bd7SHeiko Stübner int command_result; 133c6d81bd7SHeiko Stübner }; 134c6d81bd7SHeiko Stübner 135c6d81bd7SHeiko Stübner static int zforce_command(struct zforce_ts *ts, u8 cmd) 136c6d81bd7SHeiko Stübner { 137c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 138c6d81bd7SHeiko Stübner char buf[3]; 139c6d81bd7SHeiko Stübner int ret; 140c6d81bd7SHeiko Stübner 141c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); 142c6d81bd7SHeiko Stübner 143c6d81bd7SHeiko Stübner buf[0] = FRAME_START; 144c6d81bd7SHeiko Stübner buf[1] = 1; /* data size, command only */ 145c6d81bd7SHeiko Stübner buf[2] = cmd; 146c6d81bd7SHeiko Stübner 147c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 148c6d81bd7SHeiko Stübner ret = i2c_master_send(client, &buf[0], ARRAY_SIZE(buf)); 149c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 150c6d81bd7SHeiko Stübner if (ret < 0) { 151c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 152c6d81bd7SHeiko Stübner return ret; 153c6d81bd7SHeiko Stübner } 154c6d81bd7SHeiko Stübner 155c6d81bd7SHeiko Stübner return 0; 156c6d81bd7SHeiko Stübner } 157c6d81bd7SHeiko Stübner 158c6d81bd7SHeiko Stübner static int zforce_send_wait(struct zforce_ts *ts, const char *buf, int len) 159c6d81bd7SHeiko Stübner { 160c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 161c6d81bd7SHeiko Stübner int ret; 162c6d81bd7SHeiko Stübner 163c6d81bd7SHeiko Stübner ret = mutex_trylock(&ts->command_mutex); 164c6d81bd7SHeiko Stübner if (!ret) { 165c6d81bd7SHeiko Stübner dev_err(&client->dev, "already waiting for a command\n"); 166c6d81bd7SHeiko Stübner return -EBUSY; 167c6d81bd7SHeiko Stübner } 168c6d81bd7SHeiko Stübner 169c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "sending %d bytes for command 0x%x\n", 170c6d81bd7SHeiko Stübner buf[1], buf[2]); 171c6d81bd7SHeiko Stübner 172c6d81bd7SHeiko Stübner ts->command_waiting = buf[2]; 173c6d81bd7SHeiko Stübner 174c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 175c6d81bd7SHeiko Stübner ret = i2c_master_send(client, buf, len); 176c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 177c6d81bd7SHeiko Stübner if (ret < 0) { 178c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 179c6d81bd7SHeiko Stübner goto unlock; 180c6d81bd7SHeiko Stübner } 181c6d81bd7SHeiko Stübner 182c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "waiting for result for command 0x%x\n", buf[2]); 183c6d81bd7SHeiko Stübner 184c6d81bd7SHeiko Stübner if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) { 185c6d81bd7SHeiko Stübner ret = -ETIME; 186c6d81bd7SHeiko Stübner goto unlock; 187c6d81bd7SHeiko Stübner } 188c6d81bd7SHeiko Stübner 189c6d81bd7SHeiko Stübner ret = ts->command_result; 190c6d81bd7SHeiko Stübner 191c6d81bd7SHeiko Stübner unlock: 192c6d81bd7SHeiko Stübner mutex_unlock(&ts->command_mutex); 193c6d81bd7SHeiko Stübner return ret; 194c6d81bd7SHeiko Stübner } 195c6d81bd7SHeiko Stübner 196c6d81bd7SHeiko Stübner static int zforce_command_wait(struct zforce_ts *ts, u8 cmd) 197c6d81bd7SHeiko Stübner { 198c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 199c6d81bd7SHeiko Stübner char buf[3]; 200c6d81bd7SHeiko Stübner int ret; 201c6d81bd7SHeiko Stübner 202c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); 203c6d81bd7SHeiko Stübner 204c6d81bd7SHeiko Stübner buf[0] = FRAME_START; 205c6d81bd7SHeiko Stübner buf[1] = 1; /* data size, command only */ 206c6d81bd7SHeiko Stübner buf[2] = cmd; 207c6d81bd7SHeiko Stübner 208c6d81bd7SHeiko Stübner ret = zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 209c6d81bd7SHeiko Stübner if (ret < 0) { 210c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 211c6d81bd7SHeiko Stübner return ret; 212c6d81bd7SHeiko Stübner } 213c6d81bd7SHeiko Stübner 214c6d81bd7SHeiko Stübner return 0; 215c6d81bd7SHeiko Stübner } 216c6d81bd7SHeiko Stübner 217c6d81bd7SHeiko Stübner static int zforce_resolution(struct zforce_ts *ts, u16 x, u16 y) 218c6d81bd7SHeiko Stübner { 219c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 220c6d81bd7SHeiko Stübner char buf[7] = { FRAME_START, 5, COMMAND_RESOLUTION, 221c6d81bd7SHeiko Stübner (x & 0xff), ((x >> 8) & 0xff), 222c6d81bd7SHeiko Stübner (y & 0xff), ((y >> 8) & 0xff) }; 223c6d81bd7SHeiko Stübner 224c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set resolution to (%d,%d)\n", x, y); 225c6d81bd7SHeiko Stübner 226c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 227c6d81bd7SHeiko Stübner } 228c6d81bd7SHeiko Stübner 229c6d81bd7SHeiko Stübner static int zforce_scan_frequency(struct zforce_ts *ts, u16 idle, u16 finger, 230c6d81bd7SHeiko Stübner u16 stylus) 231c6d81bd7SHeiko Stübner { 232c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 233c6d81bd7SHeiko Stübner char buf[9] = { FRAME_START, 7, COMMAND_SCANFREQ, 234c6d81bd7SHeiko Stübner (idle & 0xff), ((idle >> 8) & 0xff), 235c6d81bd7SHeiko Stübner (finger & 0xff), ((finger >> 8) & 0xff), 236c6d81bd7SHeiko Stübner (stylus & 0xff), ((stylus >> 8) & 0xff) }; 237c6d81bd7SHeiko Stübner 238c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set scan frequency to (idle: %d, finger: %d, stylus: %d)\n", 239c6d81bd7SHeiko Stübner idle, finger, stylus); 240c6d81bd7SHeiko Stübner 241c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 242c6d81bd7SHeiko Stübner } 243c6d81bd7SHeiko Stübner 244c6d81bd7SHeiko Stübner static int zforce_setconfig(struct zforce_ts *ts, char b1) 245c6d81bd7SHeiko Stübner { 246c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 247c6d81bd7SHeiko Stübner char buf[7] = { FRAME_START, 5, COMMAND_SETCONFIG, 248c6d81bd7SHeiko Stübner b1, 0, 0, 0 }; 249c6d81bd7SHeiko Stübner 250c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set config to (%d)\n", b1); 251c6d81bd7SHeiko Stübner 252c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 253c6d81bd7SHeiko Stübner } 254c6d81bd7SHeiko Stübner 255c6d81bd7SHeiko Stübner static int zforce_start(struct zforce_ts *ts) 256c6d81bd7SHeiko Stübner { 257c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 258c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); 259c6d81bd7SHeiko Stübner int ret; 260c6d81bd7SHeiko Stübner 261c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "starting device\n"); 262c6d81bd7SHeiko Stübner 263c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_INITIALIZE); 264c6d81bd7SHeiko Stübner if (ret) { 265c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to initialize, %d\n", ret); 266c6d81bd7SHeiko Stübner return ret; 267c6d81bd7SHeiko Stübner } 268c6d81bd7SHeiko Stübner 269c6d81bd7SHeiko Stübner ret = zforce_resolution(ts, pdata->x_max, pdata->y_max); 270c6d81bd7SHeiko Stübner if (ret) { 271c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set resolution, %d\n", ret); 272c6d81bd7SHeiko Stübner goto error; 273c6d81bd7SHeiko Stübner } 274c6d81bd7SHeiko Stübner 275c6d81bd7SHeiko Stübner ret = zforce_scan_frequency(ts, 10, 50, 50); 276c6d81bd7SHeiko Stübner if (ret) { 277c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set scan frequency, %d\n", 278c6d81bd7SHeiko Stübner ret); 279c6d81bd7SHeiko Stübner goto error; 280c6d81bd7SHeiko Stübner } 281c6d81bd7SHeiko Stübner 2823c4396b4SWei Yongjun ret = zforce_setconfig(ts, SETCONFIG_DUALTOUCH); 2833c4396b4SWei Yongjun if (ret) { 284c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set config\n"); 285c6d81bd7SHeiko Stübner goto error; 286c6d81bd7SHeiko Stübner } 287c6d81bd7SHeiko Stübner 288c6d81bd7SHeiko Stübner /* start sending touch events */ 289c6d81bd7SHeiko Stübner ret = zforce_command(ts, COMMAND_DATAREQUEST); 290c6d81bd7SHeiko Stübner if (ret) { 291c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to request data\n"); 292c6d81bd7SHeiko Stübner goto error; 293c6d81bd7SHeiko Stübner } 294c6d81bd7SHeiko Stübner 295c6d81bd7SHeiko Stübner /* 296c6d81bd7SHeiko Stübner * Per NN, initial cal. take max. of 200msec. 297c6d81bd7SHeiko Stübner * Allow time to complete this calibration 298c6d81bd7SHeiko Stübner */ 299c6d81bd7SHeiko Stübner msleep(200); 300c6d81bd7SHeiko Stübner 301c6d81bd7SHeiko Stübner return 0; 302c6d81bd7SHeiko Stübner 303c6d81bd7SHeiko Stübner error: 304c6d81bd7SHeiko Stübner zforce_command_wait(ts, COMMAND_DEACTIVATE); 305c6d81bd7SHeiko Stübner return ret; 306c6d81bd7SHeiko Stübner } 307c6d81bd7SHeiko Stübner 308c6d81bd7SHeiko Stübner static int zforce_stop(struct zforce_ts *ts) 309c6d81bd7SHeiko Stübner { 310c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 311c6d81bd7SHeiko Stübner int ret; 312c6d81bd7SHeiko Stübner 313c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "stopping device\n"); 314c6d81bd7SHeiko Stübner 315c6d81bd7SHeiko Stübner /* Deactivates touch sensing and puts the device into sleep. */ 316c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_DEACTIVATE); 317c6d81bd7SHeiko Stübner if (ret != 0) { 318c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not deactivate device, %d\n", 319c6d81bd7SHeiko Stübner ret); 320c6d81bd7SHeiko Stübner return ret; 321c6d81bd7SHeiko Stübner } 322c6d81bd7SHeiko Stübner 323c6d81bd7SHeiko Stübner return 0; 324c6d81bd7SHeiko Stübner } 325c6d81bd7SHeiko Stübner 326c6d81bd7SHeiko Stübner static int zforce_touch_event(struct zforce_ts *ts, u8 *payload) 327c6d81bd7SHeiko Stübner { 328c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 329c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); 330c6d81bd7SHeiko Stübner struct zforce_point point; 331c6d81bd7SHeiko Stübner int count, i, num = 0; 332c6d81bd7SHeiko Stübner 333c6d81bd7SHeiko Stübner count = payload[0]; 334c6d81bd7SHeiko Stübner if (count > ZFORCE_REPORT_POINTS) { 335c6d81bd7SHeiko Stübner dev_warn(&client->dev, "to many coordinates %d, expected max %d\n", 336c6d81bd7SHeiko Stübner count, ZFORCE_REPORT_POINTS); 337c6d81bd7SHeiko Stübner count = ZFORCE_REPORT_POINTS; 338c6d81bd7SHeiko Stübner } 339c6d81bd7SHeiko Stübner 340c6d81bd7SHeiko Stübner for (i = 0; i < count; i++) { 341c6d81bd7SHeiko Stübner point.coord_x = 342c6d81bd7SHeiko Stübner payload[9 * i + 2] << 8 | payload[9 * i + 1]; 343c6d81bd7SHeiko Stübner point.coord_y = 344c6d81bd7SHeiko Stübner payload[9 * i + 4] << 8 | payload[9 * i + 3]; 345c6d81bd7SHeiko Stübner 346c6d81bd7SHeiko Stübner if (point.coord_x > pdata->x_max || 347c6d81bd7SHeiko Stübner point.coord_y > pdata->y_max) { 348c6d81bd7SHeiko Stübner dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", 349c6d81bd7SHeiko Stübner point.coord_x, point.coord_y); 350c6d81bd7SHeiko Stübner point.coord_x = point.coord_y = 0; 351c6d81bd7SHeiko Stübner } 352c6d81bd7SHeiko Stübner 353c6d81bd7SHeiko Stübner point.state = payload[9 * i + 5] & 0x03; 354c6d81bd7SHeiko Stübner point.id = (payload[9 * i + 5] & 0xfc) >> 2; 355c6d81bd7SHeiko Stübner 356c6d81bd7SHeiko Stübner /* determine touch major, minor and orientation */ 357c6d81bd7SHeiko Stübner point.area_major = max(payload[9 * i + 6], 358c6d81bd7SHeiko Stübner payload[9 * i + 7]); 359c6d81bd7SHeiko Stübner point.area_minor = min(payload[9 * i + 6], 360c6d81bd7SHeiko Stübner payload[9 * i + 7]); 361c6d81bd7SHeiko Stübner point.orientation = payload[9 * i + 6] > payload[9 * i + 7]; 362c6d81bd7SHeiko Stübner 363c6d81bd7SHeiko Stübner point.pressure = payload[9 * i + 8]; 364c6d81bd7SHeiko Stübner point.prblty = payload[9 * i + 9]; 365c6d81bd7SHeiko Stübner 366c6d81bd7SHeiko Stübner dev_dbg(&client->dev, 367c6d81bd7SHeiko Stübner "point %d/%d: state %d, id %d, pressure %d, prblty %d, x %d, y %d, amajor %d, aminor %d, ori %d\n", 368c6d81bd7SHeiko Stübner i, count, point.state, point.id, 369c6d81bd7SHeiko Stübner point.pressure, point.prblty, 370c6d81bd7SHeiko Stübner point.coord_x, point.coord_y, 371c6d81bd7SHeiko Stübner point.area_major, point.area_minor, 372c6d81bd7SHeiko Stübner point.orientation); 373c6d81bd7SHeiko Stübner 374c6d81bd7SHeiko Stübner /* the zforce id starts with "1", so needs to be decreased */ 375c6d81bd7SHeiko Stübner input_mt_slot(ts->input, point.id - 1); 376c6d81bd7SHeiko Stübner 377c6d81bd7SHeiko Stübner input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 378c6d81bd7SHeiko Stübner point.state != STATE_UP); 379c6d81bd7SHeiko Stübner 380c6d81bd7SHeiko Stübner if (point.state != STATE_UP) { 381c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_POSITION_X, 382c6d81bd7SHeiko Stübner point.coord_x); 383c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_POSITION_Y, 384c6d81bd7SHeiko Stübner point.coord_y); 385c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 386c6d81bd7SHeiko Stübner point.area_major); 387c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 388c6d81bd7SHeiko Stübner point.area_minor); 389c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_ORIENTATION, 390c6d81bd7SHeiko Stübner point.orientation); 391c6d81bd7SHeiko Stübner num++; 392c6d81bd7SHeiko Stübner } 393c6d81bd7SHeiko Stübner } 394c6d81bd7SHeiko Stübner 395c6d81bd7SHeiko Stübner input_mt_sync_frame(ts->input); 396c6d81bd7SHeiko Stübner 397c6d81bd7SHeiko Stübner input_mt_report_finger_count(ts->input, num); 398c6d81bd7SHeiko Stübner 399c6d81bd7SHeiko Stübner input_sync(ts->input); 400c6d81bd7SHeiko Stübner 401c6d81bd7SHeiko Stübner return 0; 402c6d81bd7SHeiko Stübner } 403c6d81bd7SHeiko Stübner 404c6d81bd7SHeiko Stübner static int zforce_read_packet(struct zforce_ts *ts, u8 *buf) 405c6d81bd7SHeiko Stübner { 406c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 407c6d81bd7SHeiko Stübner int ret; 408c6d81bd7SHeiko Stübner 409c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 410c6d81bd7SHeiko Stübner 411c6d81bd7SHeiko Stübner /* read 2 byte message header */ 412c6d81bd7SHeiko Stübner ret = i2c_master_recv(client, buf, 2); 413c6d81bd7SHeiko Stübner if (ret < 0) { 414c6d81bd7SHeiko Stübner dev_err(&client->dev, "error reading header: %d\n", ret); 415c6d81bd7SHeiko Stübner goto unlock; 416c6d81bd7SHeiko Stübner } 417c6d81bd7SHeiko Stübner 418c6d81bd7SHeiko Stübner if (buf[PAYLOAD_HEADER] != FRAME_START) { 419c6d81bd7SHeiko Stübner dev_err(&client->dev, "invalid frame start: %d\n", buf[0]); 420c6d81bd7SHeiko Stübner ret = -EIO; 421c6d81bd7SHeiko Stübner goto unlock; 422c6d81bd7SHeiko Stübner } 423c6d81bd7SHeiko Stübner 424c6d81bd7SHeiko Stübner if (buf[PAYLOAD_LENGTH] <= 0 || buf[PAYLOAD_LENGTH] > 255) { 425c6d81bd7SHeiko Stübner dev_err(&client->dev, "invalid payload length: %d\n", 426c6d81bd7SHeiko Stübner buf[PAYLOAD_LENGTH]); 427c6d81bd7SHeiko Stübner ret = -EIO; 428c6d81bd7SHeiko Stübner goto unlock; 429c6d81bd7SHeiko Stübner } 430c6d81bd7SHeiko Stübner 431c6d81bd7SHeiko Stübner /* read the message */ 432c6d81bd7SHeiko Stübner ret = i2c_master_recv(client, &buf[PAYLOAD_BODY], buf[PAYLOAD_LENGTH]); 433c6d81bd7SHeiko Stübner if (ret < 0) { 434c6d81bd7SHeiko Stübner dev_err(&client->dev, "error reading payload: %d\n", ret); 435c6d81bd7SHeiko Stübner goto unlock; 436c6d81bd7SHeiko Stübner } 437c6d81bd7SHeiko Stübner 438c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "read %d bytes for response command 0x%x\n", 439c6d81bd7SHeiko Stübner buf[PAYLOAD_LENGTH], buf[PAYLOAD_BODY]); 440c6d81bd7SHeiko Stübner 441c6d81bd7SHeiko Stübner unlock: 442c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 443c6d81bd7SHeiko Stübner return ret; 444c6d81bd7SHeiko Stübner } 445c6d81bd7SHeiko Stübner 446c6d81bd7SHeiko Stübner static void zforce_complete(struct zforce_ts *ts, int cmd, int result) 447c6d81bd7SHeiko Stübner { 448c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 449c6d81bd7SHeiko Stübner 450c6d81bd7SHeiko Stübner if (ts->command_waiting == cmd) { 451c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "completing command 0x%x\n", cmd); 452c6d81bd7SHeiko Stübner ts->command_result = result; 453c6d81bd7SHeiko Stübner complete(&ts->command_done); 454c6d81bd7SHeiko Stübner } else { 455c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "command %d not for us\n", cmd); 456c6d81bd7SHeiko Stübner } 457c6d81bd7SHeiko Stübner } 458c6d81bd7SHeiko Stübner 459c6d81bd7SHeiko Stübner static irqreturn_t zforce_interrupt(int irq, void *dev_id) 460c6d81bd7SHeiko Stübner { 461c6d81bd7SHeiko Stübner struct zforce_ts *ts = dev_id; 462c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 463c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); 464c6d81bd7SHeiko Stübner int ret; 465c6d81bd7SHeiko Stübner u8 payload_buffer[512]; 466c6d81bd7SHeiko Stübner u8 *payload; 467c6d81bd7SHeiko Stübner 468c6d81bd7SHeiko Stübner /* 469c6d81bd7SHeiko Stübner * When suspended, emit a wakeup signal if necessary and return. 470c6d81bd7SHeiko Stübner * Due to the level-interrupt we will get re-triggered later. 471c6d81bd7SHeiko Stübner */ 472c6d81bd7SHeiko Stübner if (ts->suspended) { 473c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) 474c6d81bd7SHeiko Stübner pm_wakeup_event(&client->dev, 500); 475c6d81bd7SHeiko Stübner msleep(20); 476c6d81bd7SHeiko Stübner return IRQ_HANDLED; 477c6d81bd7SHeiko Stübner } 478c6d81bd7SHeiko Stübner 479c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "handling interrupt\n"); 480c6d81bd7SHeiko Stübner 481c6d81bd7SHeiko Stübner /* Don't emit wakeup events from commands run by zforce_suspend */ 482c6d81bd7SHeiko Stübner if (!ts->suspending && device_may_wakeup(&client->dev)) 483c6d81bd7SHeiko Stübner pm_stay_awake(&client->dev); 484c6d81bd7SHeiko Stübner 485c6d81bd7SHeiko Stübner while (!gpio_get_value(pdata->gpio_int)) { 486c6d81bd7SHeiko Stübner ret = zforce_read_packet(ts, payload_buffer); 487c6d81bd7SHeiko Stübner if (ret < 0) { 488c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not read packet, ret: %d\n", 489c6d81bd7SHeiko Stübner ret); 490c6d81bd7SHeiko Stübner break; 491c6d81bd7SHeiko Stübner } 492c6d81bd7SHeiko Stübner 493c6d81bd7SHeiko Stübner payload = &payload_buffer[PAYLOAD_BODY]; 494c6d81bd7SHeiko Stübner 495c6d81bd7SHeiko Stübner switch (payload[RESPONSE_ID]) { 496c6d81bd7SHeiko Stübner case NOTIFICATION_TOUCH: 497c6d81bd7SHeiko Stübner /* 498c6d81bd7SHeiko Stübner * Always report touch-events received while 499c6d81bd7SHeiko Stübner * suspending, when being a wakeup source 500c6d81bd7SHeiko Stübner */ 501c6d81bd7SHeiko Stübner if (ts->suspending && device_may_wakeup(&client->dev)) 502c6d81bd7SHeiko Stübner pm_wakeup_event(&client->dev, 500); 503c6d81bd7SHeiko Stübner zforce_touch_event(ts, &payload[RESPONSE_DATA]); 504c6d81bd7SHeiko Stübner break; 505c6d81bd7SHeiko Stübner 506c6d81bd7SHeiko Stübner case NOTIFICATION_BOOTCOMPLETE: 507c6d81bd7SHeiko Stübner ts->boot_complete = payload[RESPONSE_DATA]; 508c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 0); 509c6d81bd7SHeiko Stübner break; 510c6d81bd7SHeiko Stübner 511c6d81bd7SHeiko Stübner case RESPONSE_INITIALIZE: 512c6d81bd7SHeiko Stübner case RESPONSE_DEACTIVATE: 513c6d81bd7SHeiko Stübner case RESPONSE_SETCONFIG: 514c6d81bd7SHeiko Stübner case RESPONSE_RESOLUTION: 515c6d81bd7SHeiko Stübner case RESPONSE_SCANFREQ: 516c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 517c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]); 518c6d81bd7SHeiko Stübner break; 519c6d81bd7SHeiko Stübner 520c6d81bd7SHeiko Stübner case RESPONSE_STATUS: 521c6d81bd7SHeiko Stübner /* 522c6d81bd7SHeiko Stübner * Version Payload Results 523c6d81bd7SHeiko Stübner * [2:major] [2:minor] [2:build] [2:rev] 524c6d81bd7SHeiko Stübner */ 525c6d81bd7SHeiko Stübner ts->version_major = (payload[RESPONSE_DATA + 1] << 8) | 526c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]; 527c6d81bd7SHeiko Stübner ts->version_minor = (payload[RESPONSE_DATA + 3] << 8) | 528c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 2]; 529c6d81bd7SHeiko Stübner ts->version_build = (payload[RESPONSE_DATA + 5] << 8) | 530c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 4]; 531c6d81bd7SHeiko Stübner ts->version_rev = (payload[RESPONSE_DATA + 7] << 8) | 532c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 6]; 533c6d81bd7SHeiko Stübner dev_dbg(&ts->client->dev, "Firmware Version %04x:%04x %04x:%04x\n", 534c6d81bd7SHeiko Stübner ts->version_major, ts->version_minor, 535c6d81bd7SHeiko Stübner ts->version_build, ts->version_rev); 536c6d81bd7SHeiko Stübner 537c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 0); 538c6d81bd7SHeiko Stübner break; 539c6d81bd7SHeiko Stübner 540c6d81bd7SHeiko Stübner case NOTIFICATION_INVALID_COMMAND: 541c6d81bd7SHeiko Stübner dev_err(&ts->client->dev, "invalid command: 0x%x\n", 542c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]); 543c6d81bd7SHeiko Stübner break; 544c6d81bd7SHeiko Stübner 545c6d81bd7SHeiko Stübner default: 546c6d81bd7SHeiko Stübner dev_err(&ts->client->dev, "unrecognized response id: 0x%x\n", 547c6d81bd7SHeiko Stübner payload[RESPONSE_ID]); 548c6d81bd7SHeiko Stübner break; 549c6d81bd7SHeiko Stübner } 550c6d81bd7SHeiko Stübner } 551c6d81bd7SHeiko Stübner 552c6d81bd7SHeiko Stübner if (!ts->suspending && device_may_wakeup(&client->dev)) 553c6d81bd7SHeiko Stübner pm_relax(&client->dev); 554c6d81bd7SHeiko Stübner 555c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "finished interrupt\n"); 556c6d81bd7SHeiko Stübner 557c6d81bd7SHeiko Stübner return IRQ_HANDLED; 558c6d81bd7SHeiko Stübner } 559c6d81bd7SHeiko Stübner 560c6d81bd7SHeiko Stübner static int zforce_input_open(struct input_dev *dev) 561c6d81bd7SHeiko Stübner { 562c6d81bd7SHeiko Stübner struct zforce_ts *ts = input_get_drvdata(dev); 563c6d81bd7SHeiko Stübner int ret; 564c6d81bd7SHeiko Stübner 565c6d81bd7SHeiko Stübner ret = zforce_start(ts); 566c6d81bd7SHeiko Stübner if (ret) 567c6d81bd7SHeiko Stübner return ret; 568c6d81bd7SHeiko Stübner 569c6d81bd7SHeiko Stübner return 0; 570c6d81bd7SHeiko Stübner } 571c6d81bd7SHeiko Stübner 572c6d81bd7SHeiko Stübner static void zforce_input_close(struct input_dev *dev) 573c6d81bd7SHeiko Stübner { 574c6d81bd7SHeiko Stübner struct zforce_ts *ts = input_get_drvdata(dev); 575c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 576c6d81bd7SHeiko Stübner int ret; 577c6d81bd7SHeiko Stübner 578c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 579c6d81bd7SHeiko Stübner if (ret) 580c6d81bd7SHeiko Stübner dev_warn(&client->dev, "stopping zforce failed\n"); 581c6d81bd7SHeiko Stübner 582c6d81bd7SHeiko Stübner return; 583c6d81bd7SHeiko Stübner } 584c6d81bd7SHeiko Stübner 585c6d81bd7SHeiko Stübner #ifdef CONFIG_PM_SLEEP 586c6d81bd7SHeiko Stübner static int zforce_suspend(struct device *dev) 587c6d81bd7SHeiko Stübner { 588c6d81bd7SHeiko Stübner struct i2c_client *client = to_i2c_client(dev); 589c6d81bd7SHeiko Stübner struct zforce_ts *ts = i2c_get_clientdata(client); 590c6d81bd7SHeiko Stübner struct input_dev *input = ts->input; 591c6d81bd7SHeiko Stübner int ret = 0; 592c6d81bd7SHeiko Stübner 593c6d81bd7SHeiko Stübner mutex_lock(&input->mutex); 594c6d81bd7SHeiko Stübner ts->suspending = true; 595c6d81bd7SHeiko Stübner 596c6d81bd7SHeiko Stübner /* 597c6d81bd7SHeiko Stübner * When configured as a wakeup source device should always wake 598c6d81bd7SHeiko Stübner * the system, therefore start device if necessary. 599c6d81bd7SHeiko Stübner */ 600c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) { 601c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "suspend while being a wakeup source\n"); 602c6d81bd7SHeiko Stübner 603c6d81bd7SHeiko Stübner /* Need to start device, if not open, to be a wakeup source. */ 604c6d81bd7SHeiko Stübner if (!input->users) { 605c6d81bd7SHeiko Stübner ret = zforce_start(ts); 606c6d81bd7SHeiko Stübner if (ret) 607c6d81bd7SHeiko Stübner goto unlock; 608c6d81bd7SHeiko Stübner } 609c6d81bd7SHeiko Stübner 610c6d81bd7SHeiko Stübner enable_irq_wake(client->irq); 611c6d81bd7SHeiko Stübner } else if (input->users) { 612c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "suspend without being a wakeup source\n"); 613c6d81bd7SHeiko Stübner 614c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 615c6d81bd7SHeiko Stübner if (ret) 616c6d81bd7SHeiko Stübner goto unlock; 617c6d81bd7SHeiko Stübner 618c6d81bd7SHeiko Stübner disable_irq(client->irq); 619c6d81bd7SHeiko Stübner } 620c6d81bd7SHeiko Stübner 621c6d81bd7SHeiko Stübner ts->suspended = true; 622c6d81bd7SHeiko Stübner 623c6d81bd7SHeiko Stübner unlock: 624c6d81bd7SHeiko Stübner ts->suspending = false; 625c6d81bd7SHeiko Stübner mutex_unlock(&input->mutex); 626c6d81bd7SHeiko Stübner 627c6d81bd7SHeiko Stübner return ret; 628c6d81bd7SHeiko Stübner } 629c6d81bd7SHeiko Stübner 630c6d81bd7SHeiko Stübner static int zforce_resume(struct device *dev) 631c6d81bd7SHeiko Stübner { 632c6d81bd7SHeiko Stübner struct i2c_client *client = to_i2c_client(dev); 633c6d81bd7SHeiko Stübner struct zforce_ts *ts = i2c_get_clientdata(client); 634c6d81bd7SHeiko Stübner struct input_dev *input = ts->input; 635c6d81bd7SHeiko Stübner int ret = 0; 636c6d81bd7SHeiko Stübner 637c6d81bd7SHeiko Stübner mutex_lock(&input->mutex); 638c6d81bd7SHeiko Stübner 639c6d81bd7SHeiko Stübner ts->suspended = false; 640c6d81bd7SHeiko Stübner 641c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) { 642c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "resume from being a wakeup source\n"); 643c6d81bd7SHeiko Stübner 644c6d81bd7SHeiko Stübner disable_irq_wake(client->irq); 645c6d81bd7SHeiko Stübner 646c6d81bd7SHeiko Stübner /* need to stop device if it was not open on suspend */ 647c6d81bd7SHeiko Stübner if (!input->users) { 648c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 649c6d81bd7SHeiko Stübner if (ret) 650c6d81bd7SHeiko Stübner goto unlock; 651c6d81bd7SHeiko Stübner } 652c6d81bd7SHeiko Stübner } else if (input->users) { 653c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "resume without being a wakeup source\n"); 654c6d81bd7SHeiko Stübner 655c6d81bd7SHeiko Stübner enable_irq(client->irq); 656c6d81bd7SHeiko Stübner 657c6d81bd7SHeiko Stübner ret = zforce_start(ts); 658c6d81bd7SHeiko Stübner if (ret < 0) 659c6d81bd7SHeiko Stübner goto unlock; 660c6d81bd7SHeiko Stübner } 661c6d81bd7SHeiko Stübner 662c6d81bd7SHeiko Stübner unlock: 663c6d81bd7SHeiko Stübner mutex_unlock(&input->mutex); 664c6d81bd7SHeiko Stübner 665c6d81bd7SHeiko Stübner return ret; 666c6d81bd7SHeiko Stübner } 667c6d81bd7SHeiko Stübner #endif 668c6d81bd7SHeiko Stübner 669c6d81bd7SHeiko Stübner static SIMPLE_DEV_PM_OPS(zforce_pm_ops, zforce_suspend, zforce_resume); 670c6d81bd7SHeiko Stübner 671c6d81bd7SHeiko Stübner static void zforce_reset(void *data) 672c6d81bd7SHeiko Stübner { 673c6d81bd7SHeiko Stübner struct zforce_ts *ts = data; 674c6d81bd7SHeiko Stübner 675c6d81bd7SHeiko Stübner gpio_set_value(ts->pdata->gpio_rst, 0); 676c6d81bd7SHeiko Stübner } 677c6d81bd7SHeiko Stübner 678c6d81bd7SHeiko Stübner static int zforce_probe(struct i2c_client *client, 679c6d81bd7SHeiko Stübner const struct i2c_device_id *id) 680c6d81bd7SHeiko Stübner { 681c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); 682c6d81bd7SHeiko Stübner struct zforce_ts *ts; 683c6d81bd7SHeiko Stübner struct input_dev *input_dev; 684c6d81bd7SHeiko Stübner int ret; 685c6d81bd7SHeiko Stübner 686c6d81bd7SHeiko Stübner if (!pdata) 687c6d81bd7SHeiko Stübner return -EINVAL; 688c6d81bd7SHeiko Stübner 689c6d81bd7SHeiko Stübner ts = devm_kzalloc(&client->dev, sizeof(struct zforce_ts), GFP_KERNEL); 690c6d81bd7SHeiko Stübner if (!ts) 691c6d81bd7SHeiko Stübner return -ENOMEM; 692c6d81bd7SHeiko Stübner 693c6d81bd7SHeiko Stübner ret = devm_gpio_request_one(&client->dev, pdata->gpio_int, GPIOF_IN, 694c6d81bd7SHeiko Stübner "zforce_ts_int"); 695c6d81bd7SHeiko Stübner if (ret) { 696c6d81bd7SHeiko Stübner dev_err(&client->dev, "request of gpio %d failed, %d\n", 697c6d81bd7SHeiko Stübner pdata->gpio_int, ret); 698c6d81bd7SHeiko Stübner return ret; 699c6d81bd7SHeiko Stübner } 700c6d81bd7SHeiko Stübner 701c6d81bd7SHeiko Stübner ret = devm_gpio_request_one(&client->dev, pdata->gpio_rst, 702c6d81bd7SHeiko Stübner GPIOF_OUT_INIT_LOW, "zforce_ts_rst"); 703c6d81bd7SHeiko Stübner if (ret) { 704c6d81bd7SHeiko Stübner dev_err(&client->dev, "request of gpio %d failed, %d\n", 705c6d81bd7SHeiko Stübner pdata->gpio_rst, ret); 706c6d81bd7SHeiko Stübner return ret; 707c6d81bd7SHeiko Stübner } 708c6d81bd7SHeiko Stübner 709c6d81bd7SHeiko Stübner ret = devm_add_action(&client->dev, zforce_reset, ts); 710c6d81bd7SHeiko Stübner if (ret) { 711c6d81bd7SHeiko Stübner dev_err(&client->dev, "failed to register reset action, %d\n", 712c6d81bd7SHeiko Stübner ret); 713c6d81bd7SHeiko Stübner return ret; 714c6d81bd7SHeiko Stübner } 715c6d81bd7SHeiko Stübner 716c6d81bd7SHeiko Stübner snprintf(ts->phys, sizeof(ts->phys), 717c6d81bd7SHeiko Stübner "%s/input0", dev_name(&client->dev)); 718c6d81bd7SHeiko Stübner 719c6d81bd7SHeiko Stübner input_dev = devm_input_allocate_device(&client->dev); 720c6d81bd7SHeiko Stübner if (!input_dev) { 721c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not allocate input device\n"); 722c6d81bd7SHeiko Stübner return -ENOMEM; 723c6d81bd7SHeiko Stübner } 724c6d81bd7SHeiko Stübner 725c6d81bd7SHeiko Stübner mutex_init(&ts->access_mutex); 726c6d81bd7SHeiko Stübner mutex_init(&ts->command_mutex); 727c6d81bd7SHeiko Stübner 728c6d81bd7SHeiko Stübner ts->pdata = pdata; 729c6d81bd7SHeiko Stübner ts->client = client; 730c6d81bd7SHeiko Stübner ts->input = input_dev; 731c6d81bd7SHeiko Stübner 732c6d81bd7SHeiko Stübner input_dev->name = "Neonode zForce touchscreen"; 733c6d81bd7SHeiko Stübner input_dev->phys = ts->phys; 734c6d81bd7SHeiko Stübner input_dev->id.bustype = BUS_I2C; 735c6d81bd7SHeiko Stübner 736c6d81bd7SHeiko Stübner input_dev->open = zforce_input_open; 737c6d81bd7SHeiko Stübner input_dev->close = zforce_input_close; 738c6d81bd7SHeiko Stübner 739c6d81bd7SHeiko Stübner __set_bit(EV_KEY, input_dev->evbit); 740c6d81bd7SHeiko Stübner __set_bit(EV_SYN, input_dev->evbit); 741c6d81bd7SHeiko Stübner __set_bit(EV_ABS, input_dev->evbit); 742c6d81bd7SHeiko Stübner 743c6d81bd7SHeiko Stübner /* For multi touch */ 744c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 745c6d81bd7SHeiko Stübner pdata->x_max, 0, 0); 746c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 747c6d81bd7SHeiko Stübner pdata->y_max, 0, 0); 748c6d81bd7SHeiko Stübner 749c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 750c6d81bd7SHeiko Stübner ZFORCE_MAX_AREA, 0, 0); 751c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 752c6d81bd7SHeiko Stübner ZFORCE_MAX_AREA, 0, 0); 753c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); 754c6d81bd7SHeiko Stübner input_mt_init_slots(input_dev, ZFORCE_REPORT_POINTS, INPUT_MT_DIRECT); 755c6d81bd7SHeiko Stübner 756c6d81bd7SHeiko Stübner input_set_drvdata(ts->input, ts); 757c6d81bd7SHeiko Stübner 758c6d81bd7SHeiko Stübner init_completion(&ts->command_done); 759c6d81bd7SHeiko Stübner 760c6d81bd7SHeiko Stübner /* 761c6d81bd7SHeiko Stübner * The zforce pulls the interrupt low when it has data ready. 762c6d81bd7SHeiko Stübner * After it is triggered the isr thread runs until all the available 763c6d81bd7SHeiko Stübner * packets have been read and the interrupt is high again. 764c6d81bd7SHeiko Stübner * Therefore we can trigger the interrupt anytime it is low and do 765c6d81bd7SHeiko Stübner * not need to limit it to the interrupt edge. 766c6d81bd7SHeiko Stübner */ 767c6d81bd7SHeiko Stübner ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, 768c6d81bd7SHeiko Stübner zforce_interrupt, 769c6d81bd7SHeiko Stübner IRQF_TRIGGER_LOW | IRQF_ONESHOT, 770c6d81bd7SHeiko Stübner input_dev->name, ts); 771c6d81bd7SHeiko Stübner if (ret) { 772c6d81bd7SHeiko Stübner dev_err(&client->dev, "irq %d request failed\n", client->irq); 773c6d81bd7SHeiko Stübner return ret; 774c6d81bd7SHeiko Stübner } 775c6d81bd7SHeiko Stübner 776c6d81bd7SHeiko Stübner i2c_set_clientdata(client, ts); 777c6d81bd7SHeiko Stübner 778c6d81bd7SHeiko Stübner /* let the controller boot */ 779c6d81bd7SHeiko Stübner gpio_set_value(pdata->gpio_rst, 1); 780c6d81bd7SHeiko Stübner 781c6d81bd7SHeiko Stübner ts->command_waiting = NOTIFICATION_BOOTCOMPLETE; 782c6d81bd7SHeiko Stübner if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) 783c6d81bd7SHeiko Stübner dev_warn(&client->dev, "bootcomplete timed out\n"); 784c6d81bd7SHeiko Stübner 785c6d81bd7SHeiko Stübner /* need to start device to get version information */ 786c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_INITIALIZE); 787c6d81bd7SHeiko Stübner if (ret) { 788c6d81bd7SHeiko Stübner dev_err(&client->dev, "unable to initialize, %d\n", ret); 789c6d81bd7SHeiko Stübner return ret; 790c6d81bd7SHeiko Stübner } 791c6d81bd7SHeiko Stübner 792c6d81bd7SHeiko Stübner /* this gets the firmware version among other informations */ 793c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_STATUS); 794c6d81bd7SHeiko Stübner if (ret < 0) { 795c6d81bd7SHeiko Stübner dev_err(&client->dev, "couldn't get status, %d\n", ret); 796c6d81bd7SHeiko Stübner zforce_stop(ts); 797c6d81bd7SHeiko Stübner return ret; 798c6d81bd7SHeiko Stübner } 799c6d81bd7SHeiko Stübner 800c6d81bd7SHeiko Stübner /* stop device and put it into sleep until it is opened */ 801c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 802c6d81bd7SHeiko Stübner if (ret < 0) 803c6d81bd7SHeiko Stübner return ret; 804c6d81bd7SHeiko Stübner 805c6d81bd7SHeiko Stübner device_set_wakeup_capable(&client->dev, true); 806c6d81bd7SHeiko Stübner 807c6d81bd7SHeiko Stübner ret = input_register_device(input_dev); 808c6d81bd7SHeiko Stübner if (ret) { 809c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not register input device, %d\n", 810c6d81bd7SHeiko Stübner ret); 811c6d81bd7SHeiko Stübner return ret; 812c6d81bd7SHeiko Stübner } 813c6d81bd7SHeiko Stübner 814c6d81bd7SHeiko Stübner return 0; 815c6d81bd7SHeiko Stübner } 816c6d81bd7SHeiko Stübner 817c6d81bd7SHeiko Stübner static struct i2c_device_id zforce_idtable[] = { 818c6d81bd7SHeiko Stübner { "zforce-ts", 0 }, 819c6d81bd7SHeiko Stübner { } 820c6d81bd7SHeiko Stübner }; 821c6d81bd7SHeiko Stübner MODULE_DEVICE_TABLE(i2c, zforce_idtable); 822c6d81bd7SHeiko Stübner 823c6d81bd7SHeiko Stübner static struct i2c_driver zforce_driver = { 824c6d81bd7SHeiko Stübner .driver = { 825c6d81bd7SHeiko Stübner .owner = THIS_MODULE, 826c6d81bd7SHeiko Stübner .name = "zforce-ts", 827c6d81bd7SHeiko Stübner .pm = &zforce_pm_ops, 828c6d81bd7SHeiko Stübner }, 829c6d81bd7SHeiko Stübner .probe = zforce_probe, 830c6d81bd7SHeiko Stübner .id_table = zforce_idtable, 831c6d81bd7SHeiko Stübner }; 832c6d81bd7SHeiko Stübner 833c6d81bd7SHeiko Stübner module_i2c_driver(zforce_driver); 834c6d81bd7SHeiko Stübner 835c6d81bd7SHeiko Stübner MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); 836c6d81bd7SHeiko Stübner MODULE_DESCRIPTION("zForce TouchScreen Driver"); 837c6d81bd7SHeiko Stübner MODULE_LICENSE("GPL"); 838