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> 3239740370SHeiko Stuebner #include <linux/regulator/consumer.h> 3339740370SHeiko Stuebner #include <linux/delay.h> 346f2e6c9bSHeiko Stübner #include <linux/of.h> 356f2e6c9bSHeiko Stübner #include <linux/of_gpio.h> 36c6d81bd7SHeiko Stübner 37c6d81bd7SHeiko Stübner #define WAIT_TIMEOUT msecs_to_jiffies(1000) 38c6d81bd7SHeiko Stübner 39c6d81bd7SHeiko Stübner #define FRAME_START 0xee 40d333b606SLuis Ortega #define FRAME_MAXSIZE 257 41c6d81bd7SHeiko Stübner 42c6d81bd7SHeiko Stübner /* Offsets of the different parts of the payload the controller sends */ 43c6d81bd7SHeiko Stübner #define PAYLOAD_HEADER 0 44c6d81bd7SHeiko Stübner #define PAYLOAD_LENGTH 1 45c6d81bd7SHeiko Stübner #define PAYLOAD_BODY 2 46c6d81bd7SHeiko Stübner 47c6d81bd7SHeiko Stübner /* Response offsets */ 48c6d81bd7SHeiko Stübner #define RESPONSE_ID 0 49c6d81bd7SHeiko Stübner #define RESPONSE_DATA 1 50c6d81bd7SHeiko Stübner 51c6d81bd7SHeiko Stübner /* Commands */ 52c6d81bd7SHeiko Stübner #define COMMAND_DEACTIVATE 0x00 53c6d81bd7SHeiko Stübner #define COMMAND_INITIALIZE 0x01 54c6d81bd7SHeiko Stübner #define COMMAND_RESOLUTION 0x02 55c6d81bd7SHeiko Stübner #define COMMAND_SETCONFIG 0x03 56c6d81bd7SHeiko Stübner #define COMMAND_DATAREQUEST 0x04 57c6d81bd7SHeiko Stübner #define COMMAND_SCANFREQ 0x08 58c6d81bd7SHeiko Stübner #define COMMAND_STATUS 0X1e 59c6d81bd7SHeiko Stübner 60c6d81bd7SHeiko Stübner /* 61c6d81bd7SHeiko Stübner * Responses the controller sends as a result of 62c6d81bd7SHeiko Stübner * command requests 63c6d81bd7SHeiko Stübner */ 64c6d81bd7SHeiko Stübner #define RESPONSE_DEACTIVATE 0x00 65c6d81bd7SHeiko Stübner #define RESPONSE_INITIALIZE 0x01 66c6d81bd7SHeiko Stübner #define RESPONSE_RESOLUTION 0x02 67c6d81bd7SHeiko Stübner #define RESPONSE_SETCONFIG 0x03 68c6d81bd7SHeiko Stübner #define RESPONSE_SCANFREQ 0x08 69c6d81bd7SHeiko Stübner #define RESPONSE_STATUS 0X1e 70c6d81bd7SHeiko Stübner 71c6d81bd7SHeiko Stübner /* 72deb49819SLuis Ortega * Notifications are sent by the touch controller without 73c6d81bd7SHeiko Stübner * being requested by the driver and include for example 74c6d81bd7SHeiko Stübner * touch indications 75c6d81bd7SHeiko Stübner */ 76c6d81bd7SHeiko Stübner #define NOTIFICATION_TOUCH 0x04 77c6d81bd7SHeiko Stübner #define NOTIFICATION_BOOTCOMPLETE 0x07 78c6d81bd7SHeiko Stübner #define NOTIFICATION_OVERRUN 0x25 79c6d81bd7SHeiko Stübner #define NOTIFICATION_PROXIMITY 0x26 80c6d81bd7SHeiko Stübner #define NOTIFICATION_INVALID_COMMAND 0xfe 81c6d81bd7SHeiko Stübner 82c6d81bd7SHeiko Stübner #define ZFORCE_REPORT_POINTS 2 83c6d81bd7SHeiko Stübner #define ZFORCE_MAX_AREA 0xff 84c6d81bd7SHeiko Stübner 85c6d81bd7SHeiko Stübner #define STATE_DOWN 0 86c6d81bd7SHeiko Stübner #define STATE_MOVE 1 87c6d81bd7SHeiko Stübner #define STATE_UP 2 88c6d81bd7SHeiko Stübner 89c6d81bd7SHeiko Stübner #define SETCONFIG_DUALTOUCH (1 << 0) 90c6d81bd7SHeiko Stübner 91c6d81bd7SHeiko Stübner struct zforce_point { 92c6d81bd7SHeiko Stübner int coord_x; 93c6d81bd7SHeiko Stübner int coord_y; 94c6d81bd7SHeiko Stübner int state; 95c6d81bd7SHeiko Stübner int id; 96c6d81bd7SHeiko Stübner int area_major; 97c6d81bd7SHeiko Stübner int area_minor; 98c6d81bd7SHeiko Stübner int orientation; 99c6d81bd7SHeiko Stübner int pressure; 100c6d81bd7SHeiko Stübner int prblty; 101c6d81bd7SHeiko Stübner }; 102c6d81bd7SHeiko Stübner 103c6d81bd7SHeiko Stübner /* 104c6d81bd7SHeiko Stübner * @client the i2c_client 105c6d81bd7SHeiko Stübner * @input the input device 106c6d81bd7SHeiko Stübner * @suspending in the process of going to suspend (don't emit wakeup 107c6d81bd7SHeiko Stübner * events for commands executed to suspend the device) 108c6d81bd7SHeiko Stübner * @suspended device suspended 109c6d81bd7SHeiko Stübner * @access_mutex serialize i2c-access, to keep multipart reads together 110c6d81bd7SHeiko Stübner * @command_done completion to wait for the command result 111deb49819SLuis Ortega * @command_mutex serialize commands sent to the ic 112deb49819SLuis Ortega * @command_waiting the id of the command that is currently waiting 113c6d81bd7SHeiko Stübner * for a result 114c6d81bd7SHeiko Stübner * @command_result returned result of the command 115c6d81bd7SHeiko Stübner */ 116c6d81bd7SHeiko Stübner struct zforce_ts { 117c6d81bd7SHeiko Stübner struct i2c_client *client; 118c6d81bd7SHeiko Stübner struct input_dev *input; 119c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata; 120c6d81bd7SHeiko Stübner char phys[32]; 121c6d81bd7SHeiko Stübner 12239740370SHeiko Stuebner struct regulator *reg_vdd; 12339740370SHeiko Stuebner 124c6d81bd7SHeiko Stübner bool suspending; 125c6d81bd7SHeiko Stübner bool suspended; 126c6d81bd7SHeiko Stübner bool boot_complete; 127c6d81bd7SHeiko Stübner 128c6d81bd7SHeiko Stübner /* Firmware version information */ 129c6d81bd7SHeiko Stübner u16 version_major; 130c6d81bd7SHeiko Stübner u16 version_minor; 131c6d81bd7SHeiko Stübner u16 version_build; 132c6d81bd7SHeiko Stübner u16 version_rev; 133c6d81bd7SHeiko Stübner 134c6d81bd7SHeiko Stübner struct mutex access_mutex; 135c6d81bd7SHeiko Stübner 136c6d81bd7SHeiko Stübner struct completion command_done; 137c6d81bd7SHeiko Stübner struct mutex command_mutex; 138c6d81bd7SHeiko Stübner int command_waiting; 139c6d81bd7SHeiko Stübner int command_result; 140c6d81bd7SHeiko Stübner }; 141c6d81bd7SHeiko Stübner 142c6d81bd7SHeiko Stübner static int zforce_command(struct zforce_ts *ts, u8 cmd) 143c6d81bd7SHeiko Stübner { 144c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 145c6d81bd7SHeiko Stübner char buf[3]; 146c6d81bd7SHeiko Stübner int ret; 147c6d81bd7SHeiko Stübner 148c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); 149c6d81bd7SHeiko Stübner 150c6d81bd7SHeiko Stübner buf[0] = FRAME_START; 151c6d81bd7SHeiko Stübner buf[1] = 1; /* data size, command only */ 152c6d81bd7SHeiko Stübner buf[2] = cmd; 153c6d81bd7SHeiko Stübner 154c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 155c6d81bd7SHeiko Stübner ret = i2c_master_send(client, &buf[0], ARRAY_SIZE(buf)); 156c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 157c6d81bd7SHeiko Stübner if (ret < 0) { 158c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 159c6d81bd7SHeiko Stübner return ret; 160c6d81bd7SHeiko Stübner } 161c6d81bd7SHeiko Stübner 162c6d81bd7SHeiko Stübner return 0; 163c6d81bd7SHeiko Stübner } 164c6d81bd7SHeiko Stübner 165c6d81bd7SHeiko Stübner static int zforce_send_wait(struct zforce_ts *ts, const char *buf, int len) 166c6d81bd7SHeiko Stübner { 167c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 168c6d81bd7SHeiko Stübner int ret; 169c6d81bd7SHeiko Stübner 170c6d81bd7SHeiko Stübner ret = mutex_trylock(&ts->command_mutex); 171c6d81bd7SHeiko Stübner if (!ret) { 172c6d81bd7SHeiko Stübner dev_err(&client->dev, "already waiting for a command\n"); 173c6d81bd7SHeiko Stübner return -EBUSY; 174c6d81bd7SHeiko Stübner } 175c6d81bd7SHeiko Stübner 176c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "sending %d bytes for command 0x%x\n", 177c6d81bd7SHeiko Stübner buf[1], buf[2]); 178c6d81bd7SHeiko Stübner 179c6d81bd7SHeiko Stübner ts->command_waiting = buf[2]; 180c6d81bd7SHeiko Stübner 181c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 182c6d81bd7SHeiko Stübner ret = i2c_master_send(client, buf, len); 183c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 184c6d81bd7SHeiko Stübner if (ret < 0) { 185c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 186c6d81bd7SHeiko Stübner goto unlock; 187c6d81bd7SHeiko Stübner } 188c6d81bd7SHeiko Stübner 189c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "waiting for result for command 0x%x\n", buf[2]); 190c6d81bd7SHeiko Stübner 191c6d81bd7SHeiko Stübner if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) { 192c6d81bd7SHeiko Stübner ret = -ETIME; 193c6d81bd7SHeiko Stübner goto unlock; 194c6d81bd7SHeiko Stübner } 195c6d81bd7SHeiko Stübner 196c6d81bd7SHeiko Stübner ret = ts->command_result; 197c6d81bd7SHeiko Stübner 198c6d81bd7SHeiko Stübner unlock: 199c6d81bd7SHeiko Stübner mutex_unlock(&ts->command_mutex); 200c6d81bd7SHeiko Stübner return ret; 201c6d81bd7SHeiko Stübner } 202c6d81bd7SHeiko Stübner 203c6d81bd7SHeiko Stübner static int zforce_command_wait(struct zforce_ts *ts, u8 cmd) 204c6d81bd7SHeiko Stübner { 205c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 206c6d81bd7SHeiko Stübner char buf[3]; 207c6d81bd7SHeiko Stübner int ret; 208c6d81bd7SHeiko Stübner 209c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); 210c6d81bd7SHeiko Stübner 211c6d81bd7SHeiko Stübner buf[0] = FRAME_START; 212c6d81bd7SHeiko Stübner buf[1] = 1; /* data size, command only */ 213c6d81bd7SHeiko Stübner buf[2] = cmd; 214c6d81bd7SHeiko Stübner 215c6d81bd7SHeiko Stübner ret = zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 216c6d81bd7SHeiko Stübner if (ret < 0) { 217c6d81bd7SHeiko Stübner dev_err(&client->dev, "i2c send data request error: %d\n", ret); 218c6d81bd7SHeiko Stübner return ret; 219c6d81bd7SHeiko Stübner } 220c6d81bd7SHeiko Stübner 221c6d81bd7SHeiko Stübner return 0; 222c6d81bd7SHeiko Stübner } 223c6d81bd7SHeiko Stübner 224c6d81bd7SHeiko Stübner static int zforce_resolution(struct zforce_ts *ts, u16 x, u16 y) 225c6d81bd7SHeiko Stübner { 226c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 227c6d81bd7SHeiko Stübner char buf[7] = { FRAME_START, 5, COMMAND_RESOLUTION, 228c6d81bd7SHeiko Stübner (x & 0xff), ((x >> 8) & 0xff), 229c6d81bd7SHeiko Stübner (y & 0xff), ((y >> 8) & 0xff) }; 230c6d81bd7SHeiko Stübner 231c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set resolution to (%d,%d)\n", x, y); 232c6d81bd7SHeiko Stübner 233c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 234c6d81bd7SHeiko Stübner } 235c6d81bd7SHeiko Stübner 236c6d81bd7SHeiko Stübner static int zforce_scan_frequency(struct zforce_ts *ts, u16 idle, u16 finger, 237c6d81bd7SHeiko Stübner u16 stylus) 238c6d81bd7SHeiko Stübner { 239c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 240c6d81bd7SHeiko Stübner char buf[9] = { FRAME_START, 7, COMMAND_SCANFREQ, 241c6d81bd7SHeiko Stübner (idle & 0xff), ((idle >> 8) & 0xff), 242c6d81bd7SHeiko Stübner (finger & 0xff), ((finger >> 8) & 0xff), 243c6d81bd7SHeiko Stübner (stylus & 0xff), ((stylus >> 8) & 0xff) }; 244c6d81bd7SHeiko Stübner 245ad697b96SLuis Ortega dev_dbg(&client->dev, 246ad697b96SLuis Ortega "set scan frequency to (idle: %d, finger: %d, stylus: %d)\n", 247c6d81bd7SHeiko Stübner idle, finger, stylus); 248c6d81bd7SHeiko Stübner 249c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 250c6d81bd7SHeiko Stübner } 251c6d81bd7SHeiko Stübner 252c6d81bd7SHeiko Stübner static int zforce_setconfig(struct zforce_ts *ts, char b1) 253c6d81bd7SHeiko Stübner { 254c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 255c6d81bd7SHeiko Stübner char buf[7] = { FRAME_START, 5, COMMAND_SETCONFIG, 256c6d81bd7SHeiko Stübner b1, 0, 0, 0 }; 257c6d81bd7SHeiko Stübner 258c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "set config to (%d)\n", b1); 259c6d81bd7SHeiko Stübner 260c6d81bd7SHeiko Stübner return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); 261c6d81bd7SHeiko Stübner } 262c6d81bd7SHeiko Stübner 263c6d81bd7SHeiko Stübner static int zforce_start(struct zforce_ts *ts) 264c6d81bd7SHeiko Stübner { 265c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 26687273364SHeiko Stübner const struct zforce_ts_platdata *pdata = ts->pdata; 267c6d81bd7SHeiko Stübner int ret; 268c6d81bd7SHeiko Stübner 269c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "starting device\n"); 270c6d81bd7SHeiko Stübner 271c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_INITIALIZE); 272c6d81bd7SHeiko Stübner if (ret) { 273c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to initialize, %d\n", ret); 274c6d81bd7SHeiko Stübner return ret; 275c6d81bd7SHeiko Stübner } 276c6d81bd7SHeiko Stübner 277c6d81bd7SHeiko Stübner ret = zforce_resolution(ts, pdata->x_max, pdata->y_max); 278c6d81bd7SHeiko Stübner if (ret) { 279c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set resolution, %d\n", ret); 280c6d81bd7SHeiko Stübner goto error; 281c6d81bd7SHeiko Stübner } 282c6d81bd7SHeiko Stübner 283c6d81bd7SHeiko Stübner ret = zforce_scan_frequency(ts, 10, 50, 50); 284c6d81bd7SHeiko Stübner if (ret) { 285c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set scan frequency, %d\n", 286c6d81bd7SHeiko Stübner ret); 287c6d81bd7SHeiko Stübner goto error; 288c6d81bd7SHeiko Stübner } 289c6d81bd7SHeiko Stübner 2903c4396b4SWei Yongjun ret = zforce_setconfig(ts, SETCONFIG_DUALTOUCH); 2913c4396b4SWei Yongjun if (ret) { 292c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to set config\n"); 293c6d81bd7SHeiko Stübner goto error; 294c6d81bd7SHeiko Stübner } 295c6d81bd7SHeiko Stübner 296c6d81bd7SHeiko Stübner /* start sending touch events */ 297c6d81bd7SHeiko Stübner ret = zforce_command(ts, COMMAND_DATAREQUEST); 298c6d81bd7SHeiko Stübner if (ret) { 299c6d81bd7SHeiko Stübner dev_err(&client->dev, "Unable to request data\n"); 300c6d81bd7SHeiko Stübner goto error; 301c6d81bd7SHeiko Stübner } 302c6d81bd7SHeiko Stübner 303c6d81bd7SHeiko Stübner /* 304c6d81bd7SHeiko Stübner * Per NN, initial cal. take max. of 200msec. 305c6d81bd7SHeiko Stübner * Allow time to complete this calibration 306c6d81bd7SHeiko Stübner */ 307c6d81bd7SHeiko Stübner msleep(200); 308c6d81bd7SHeiko Stübner 309c6d81bd7SHeiko Stübner return 0; 310c6d81bd7SHeiko Stübner 311c6d81bd7SHeiko Stübner error: 312c6d81bd7SHeiko Stübner zforce_command_wait(ts, COMMAND_DEACTIVATE); 313c6d81bd7SHeiko Stübner return ret; 314c6d81bd7SHeiko Stübner } 315c6d81bd7SHeiko Stübner 316c6d81bd7SHeiko Stübner static int zforce_stop(struct zforce_ts *ts) 317c6d81bd7SHeiko Stübner { 318c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 319c6d81bd7SHeiko Stübner int ret; 320c6d81bd7SHeiko Stübner 321c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "stopping device\n"); 322c6d81bd7SHeiko Stübner 323c6d81bd7SHeiko Stübner /* Deactivates touch sensing and puts the device into sleep. */ 324c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_DEACTIVATE); 325c6d81bd7SHeiko Stübner if (ret != 0) { 326c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not deactivate device, %d\n", 327c6d81bd7SHeiko Stübner ret); 328c6d81bd7SHeiko Stübner return ret; 329c6d81bd7SHeiko Stübner } 330c6d81bd7SHeiko Stübner 331c6d81bd7SHeiko Stübner return 0; 332c6d81bd7SHeiko Stübner } 333c6d81bd7SHeiko Stübner 334c6d81bd7SHeiko Stübner static int zforce_touch_event(struct zforce_ts *ts, u8 *payload) 335c6d81bd7SHeiko Stübner { 336c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 33787273364SHeiko Stübner const struct zforce_ts_platdata *pdata = ts->pdata; 338c6d81bd7SHeiko Stübner struct zforce_point point; 339c6d81bd7SHeiko Stübner int count, i, num = 0; 340c6d81bd7SHeiko Stübner 341c6d81bd7SHeiko Stübner count = payload[0]; 342c6d81bd7SHeiko Stübner if (count > ZFORCE_REPORT_POINTS) { 343ad697b96SLuis Ortega dev_warn(&client->dev, 344ad697b96SLuis Ortega "too many coordinates %d, expected max %d\n", 345c6d81bd7SHeiko Stübner count, ZFORCE_REPORT_POINTS); 346c6d81bd7SHeiko Stübner count = ZFORCE_REPORT_POINTS; 347c6d81bd7SHeiko Stübner } 348c6d81bd7SHeiko Stübner 349c6d81bd7SHeiko Stübner for (i = 0; i < count; i++) { 350c6d81bd7SHeiko Stübner point.coord_x = 351c6d81bd7SHeiko Stübner payload[9 * i + 2] << 8 | payload[9 * i + 1]; 352c6d81bd7SHeiko Stübner point.coord_y = 353c6d81bd7SHeiko Stübner payload[9 * i + 4] << 8 | payload[9 * i + 3]; 354c6d81bd7SHeiko Stübner 355c6d81bd7SHeiko Stübner if (point.coord_x > pdata->x_max || 356c6d81bd7SHeiko Stübner point.coord_y > pdata->y_max) { 357c6d81bd7SHeiko Stübner dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", 358c6d81bd7SHeiko Stübner point.coord_x, point.coord_y); 359c6d81bd7SHeiko Stübner point.coord_x = point.coord_y = 0; 360c6d81bd7SHeiko Stübner } 361c6d81bd7SHeiko Stübner 362c6d81bd7SHeiko Stübner point.state = payload[9 * i + 5] & 0x03; 363c6d81bd7SHeiko Stübner point.id = (payload[9 * i + 5] & 0xfc) >> 2; 364c6d81bd7SHeiko Stübner 365c6d81bd7SHeiko Stübner /* determine touch major, minor and orientation */ 366c6d81bd7SHeiko Stübner point.area_major = max(payload[9 * i + 6], 367c6d81bd7SHeiko Stübner payload[9 * i + 7]); 368c6d81bd7SHeiko Stübner point.area_minor = min(payload[9 * i + 6], 369c6d81bd7SHeiko Stübner payload[9 * i + 7]); 370c6d81bd7SHeiko Stübner point.orientation = payload[9 * i + 6] > payload[9 * i + 7]; 371c6d81bd7SHeiko Stübner 372c6d81bd7SHeiko Stübner point.pressure = payload[9 * i + 8]; 373c6d81bd7SHeiko Stübner point.prblty = payload[9 * i + 9]; 374c6d81bd7SHeiko Stübner 375c6d81bd7SHeiko Stübner dev_dbg(&client->dev, 376c6d81bd7SHeiko Stübner "point %d/%d: state %d, id %d, pressure %d, prblty %d, x %d, y %d, amajor %d, aminor %d, ori %d\n", 377c6d81bd7SHeiko Stübner i, count, point.state, point.id, 378c6d81bd7SHeiko Stübner point.pressure, point.prblty, 379c6d81bd7SHeiko Stübner point.coord_x, point.coord_y, 380c6d81bd7SHeiko Stübner point.area_major, point.area_minor, 381c6d81bd7SHeiko Stübner point.orientation); 382c6d81bd7SHeiko Stübner 383c6d81bd7SHeiko Stübner /* the zforce id starts with "1", so needs to be decreased */ 384c6d81bd7SHeiko Stübner input_mt_slot(ts->input, point.id - 1); 385c6d81bd7SHeiko Stübner 386c6d81bd7SHeiko Stübner input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 387c6d81bd7SHeiko Stübner point.state != STATE_UP); 388c6d81bd7SHeiko Stübner 389c6d81bd7SHeiko Stübner if (point.state != STATE_UP) { 390c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_POSITION_X, 391c6d81bd7SHeiko Stübner point.coord_x); 392c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_POSITION_Y, 393c6d81bd7SHeiko Stübner point.coord_y); 394c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 395c6d81bd7SHeiko Stübner point.area_major); 396c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 397c6d81bd7SHeiko Stübner point.area_minor); 398c6d81bd7SHeiko Stübner input_report_abs(ts->input, ABS_MT_ORIENTATION, 399c6d81bd7SHeiko Stübner point.orientation); 400c6d81bd7SHeiko Stübner num++; 401c6d81bd7SHeiko Stübner } 402c6d81bd7SHeiko Stübner } 403c6d81bd7SHeiko Stübner 404c6d81bd7SHeiko Stübner input_mt_sync_frame(ts->input); 405c6d81bd7SHeiko Stübner 406c6d81bd7SHeiko Stübner input_mt_report_finger_count(ts->input, num); 407c6d81bd7SHeiko Stübner 408c6d81bd7SHeiko Stübner input_sync(ts->input); 409c6d81bd7SHeiko Stübner 410c6d81bd7SHeiko Stübner return 0; 411c6d81bd7SHeiko Stübner } 412c6d81bd7SHeiko Stübner 413c6d81bd7SHeiko Stübner static int zforce_read_packet(struct zforce_ts *ts, u8 *buf) 414c6d81bd7SHeiko Stübner { 415c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 416c6d81bd7SHeiko Stübner int ret; 417c6d81bd7SHeiko Stübner 418c6d81bd7SHeiko Stübner mutex_lock(&ts->access_mutex); 419c6d81bd7SHeiko Stübner 420c6d81bd7SHeiko Stübner /* read 2 byte message header */ 421c6d81bd7SHeiko Stübner ret = i2c_master_recv(client, buf, 2); 422c6d81bd7SHeiko Stübner if (ret < 0) { 423c6d81bd7SHeiko Stübner dev_err(&client->dev, "error reading header: %d\n", ret); 424c6d81bd7SHeiko Stübner goto unlock; 425c6d81bd7SHeiko Stübner } 426c6d81bd7SHeiko Stübner 427c6d81bd7SHeiko Stübner if (buf[PAYLOAD_HEADER] != FRAME_START) { 428c6d81bd7SHeiko Stübner dev_err(&client->dev, "invalid frame start: %d\n", buf[0]); 429c6d81bd7SHeiko Stübner ret = -EIO; 430c6d81bd7SHeiko Stübner goto unlock; 431c6d81bd7SHeiko Stübner } 432c6d81bd7SHeiko Stübner 4335aee41a6SLuis Ortega if (buf[PAYLOAD_LENGTH] == 0) { 434c6d81bd7SHeiko Stübner dev_err(&client->dev, "invalid payload length: %d\n", 435c6d81bd7SHeiko Stübner buf[PAYLOAD_LENGTH]); 436c6d81bd7SHeiko Stübner ret = -EIO; 437c6d81bd7SHeiko Stübner goto unlock; 438c6d81bd7SHeiko Stübner } 439c6d81bd7SHeiko Stübner 440c6d81bd7SHeiko Stübner /* read the message */ 441c6d81bd7SHeiko Stübner ret = i2c_master_recv(client, &buf[PAYLOAD_BODY], buf[PAYLOAD_LENGTH]); 442c6d81bd7SHeiko Stübner if (ret < 0) { 443c6d81bd7SHeiko Stübner dev_err(&client->dev, "error reading payload: %d\n", ret); 444c6d81bd7SHeiko Stübner goto unlock; 445c6d81bd7SHeiko Stübner } 446c6d81bd7SHeiko Stübner 447c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "read %d bytes for response command 0x%x\n", 448c6d81bd7SHeiko Stübner buf[PAYLOAD_LENGTH], buf[PAYLOAD_BODY]); 449c6d81bd7SHeiko Stübner 450c6d81bd7SHeiko Stübner unlock: 451c6d81bd7SHeiko Stübner mutex_unlock(&ts->access_mutex); 452c6d81bd7SHeiko Stübner return ret; 453c6d81bd7SHeiko Stübner } 454c6d81bd7SHeiko Stübner 455c6d81bd7SHeiko Stübner static void zforce_complete(struct zforce_ts *ts, int cmd, int result) 456c6d81bd7SHeiko Stübner { 457c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 458c6d81bd7SHeiko Stübner 459c6d81bd7SHeiko Stübner if (ts->command_waiting == cmd) { 460c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "completing command 0x%x\n", cmd); 461c6d81bd7SHeiko Stübner ts->command_result = result; 462c6d81bd7SHeiko Stübner complete(&ts->command_done); 463c6d81bd7SHeiko Stübner } else { 464c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "command %d not for us\n", cmd); 465c6d81bd7SHeiko Stübner } 466c6d81bd7SHeiko Stübner } 467c6d81bd7SHeiko Stübner 468499e6127SHeiko Stübner static irqreturn_t zforce_irq(int irq, void *dev_id) 469499e6127SHeiko Stübner { 470499e6127SHeiko Stübner struct zforce_ts *ts = dev_id; 471499e6127SHeiko Stübner struct i2c_client *client = ts->client; 472499e6127SHeiko Stübner 473499e6127SHeiko Stübner if (ts->suspended && device_may_wakeup(&client->dev)) 474499e6127SHeiko Stübner pm_wakeup_event(&client->dev, 500); 475499e6127SHeiko Stübner 476499e6127SHeiko Stübner return IRQ_WAKE_THREAD; 477499e6127SHeiko Stübner } 478499e6127SHeiko Stübner 479499e6127SHeiko Stübner static irqreturn_t zforce_irq_thread(int irq, void *dev_id) 480c6d81bd7SHeiko Stübner { 481c6d81bd7SHeiko Stübner struct zforce_ts *ts = dev_id; 482c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 48387273364SHeiko Stübner const struct zforce_ts_platdata *pdata = ts->pdata; 484c6d81bd7SHeiko Stübner int ret; 485d333b606SLuis Ortega u8 payload_buffer[FRAME_MAXSIZE]; 486c6d81bd7SHeiko Stübner u8 *payload; 487c6d81bd7SHeiko Stübner 488c6d81bd7SHeiko Stübner /* 489499e6127SHeiko Stübner * When still suspended, return. 490c6d81bd7SHeiko Stübner * Due to the level-interrupt we will get re-triggered later. 491c6d81bd7SHeiko Stübner */ 492c6d81bd7SHeiko Stübner if (ts->suspended) { 493c6d81bd7SHeiko Stübner msleep(20); 494c6d81bd7SHeiko Stübner return IRQ_HANDLED; 495c6d81bd7SHeiko Stübner } 496c6d81bd7SHeiko Stübner 497c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "handling interrupt\n"); 498c6d81bd7SHeiko Stübner 499c6d81bd7SHeiko Stübner /* Don't emit wakeup events from commands run by zforce_suspend */ 500c6d81bd7SHeiko Stübner if (!ts->suspending && device_may_wakeup(&client->dev)) 501c6d81bd7SHeiko Stübner pm_stay_awake(&client->dev); 502c6d81bd7SHeiko Stübner 503c6d81bd7SHeiko Stübner while (!gpio_get_value(pdata->gpio_int)) { 504c6d81bd7SHeiko Stübner ret = zforce_read_packet(ts, payload_buffer); 505c6d81bd7SHeiko Stübner if (ret < 0) { 506ad697b96SLuis Ortega dev_err(&client->dev, 507ad697b96SLuis Ortega "could not read packet, ret: %d\n", ret); 508c6d81bd7SHeiko Stübner break; 509c6d81bd7SHeiko Stübner } 510c6d81bd7SHeiko Stübner 511c6d81bd7SHeiko Stübner payload = &payload_buffer[PAYLOAD_BODY]; 512c6d81bd7SHeiko Stübner 513c6d81bd7SHeiko Stübner switch (payload[RESPONSE_ID]) { 514c6d81bd7SHeiko Stübner case NOTIFICATION_TOUCH: 515c6d81bd7SHeiko Stübner /* 516c6d81bd7SHeiko Stübner * Always report touch-events received while 517c6d81bd7SHeiko Stübner * suspending, when being a wakeup source 518c6d81bd7SHeiko Stübner */ 519c6d81bd7SHeiko Stübner if (ts->suspending && device_may_wakeup(&client->dev)) 520c6d81bd7SHeiko Stübner pm_wakeup_event(&client->dev, 500); 521c6d81bd7SHeiko Stübner zforce_touch_event(ts, &payload[RESPONSE_DATA]); 522c6d81bd7SHeiko Stübner break; 523c6d81bd7SHeiko Stübner 524c6d81bd7SHeiko Stübner case NOTIFICATION_BOOTCOMPLETE: 525c6d81bd7SHeiko Stübner ts->boot_complete = payload[RESPONSE_DATA]; 526c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 0); 527c6d81bd7SHeiko Stübner break; 528c6d81bd7SHeiko Stübner 529c6d81bd7SHeiko Stübner case RESPONSE_INITIALIZE: 530c6d81bd7SHeiko Stübner case RESPONSE_DEACTIVATE: 531c6d81bd7SHeiko Stübner case RESPONSE_SETCONFIG: 532c6d81bd7SHeiko Stübner case RESPONSE_RESOLUTION: 533c6d81bd7SHeiko Stübner case RESPONSE_SCANFREQ: 534c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 535c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]); 536c6d81bd7SHeiko Stübner break; 537c6d81bd7SHeiko Stübner 538c6d81bd7SHeiko Stübner case RESPONSE_STATUS: 539c6d81bd7SHeiko Stübner /* 540c6d81bd7SHeiko Stübner * Version Payload Results 541c6d81bd7SHeiko Stübner * [2:major] [2:minor] [2:build] [2:rev] 542c6d81bd7SHeiko Stübner */ 543c6d81bd7SHeiko Stübner ts->version_major = (payload[RESPONSE_DATA + 1] << 8) | 544c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]; 545c6d81bd7SHeiko Stübner ts->version_minor = (payload[RESPONSE_DATA + 3] << 8) | 546c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 2]; 547c6d81bd7SHeiko Stübner ts->version_build = (payload[RESPONSE_DATA + 5] << 8) | 548c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 4]; 549c6d81bd7SHeiko Stübner ts->version_rev = (payload[RESPONSE_DATA + 7] << 8) | 550c6d81bd7SHeiko Stübner payload[RESPONSE_DATA + 6]; 551ad697b96SLuis Ortega dev_dbg(&ts->client->dev, 552ad697b96SLuis Ortega "Firmware Version %04x:%04x %04x:%04x\n", 553c6d81bd7SHeiko Stübner ts->version_major, ts->version_minor, 554c6d81bd7SHeiko Stübner ts->version_build, ts->version_rev); 555c6d81bd7SHeiko Stübner 556c6d81bd7SHeiko Stübner zforce_complete(ts, payload[RESPONSE_ID], 0); 557c6d81bd7SHeiko Stübner break; 558c6d81bd7SHeiko Stübner 559c6d81bd7SHeiko Stübner case NOTIFICATION_INVALID_COMMAND: 560c6d81bd7SHeiko Stübner dev_err(&ts->client->dev, "invalid command: 0x%x\n", 561c6d81bd7SHeiko Stübner payload[RESPONSE_DATA]); 562c6d81bd7SHeiko Stübner break; 563c6d81bd7SHeiko Stübner 564c6d81bd7SHeiko Stübner default: 565ad697b96SLuis Ortega dev_err(&ts->client->dev, 566ad697b96SLuis Ortega "unrecognized response id: 0x%x\n", 567c6d81bd7SHeiko Stübner payload[RESPONSE_ID]); 568c6d81bd7SHeiko Stübner break; 569c6d81bd7SHeiko Stübner } 570c6d81bd7SHeiko Stübner } 571c6d81bd7SHeiko Stübner 572c6d81bd7SHeiko Stübner if (!ts->suspending && device_may_wakeup(&client->dev)) 573c6d81bd7SHeiko Stübner pm_relax(&client->dev); 574c6d81bd7SHeiko Stübner 575c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "finished interrupt\n"); 576c6d81bd7SHeiko Stübner 577c6d81bd7SHeiko Stübner return IRQ_HANDLED; 578c6d81bd7SHeiko Stübner } 579c6d81bd7SHeiko Stübner 580c6d81bd7SHeiko Stübner static int zforce_input_open(struct input_dev *dev) 581c6d81bd7SHeiko Stübner { 582c6d81bd7SHeiko Stübner struct zforce_ts *ts = input_get_drvdata(dev); 583c6d81bd7SHeiko Stübner int ret; 584c6d81bd7SHeiko Stübner 585c6d81bd7SHeiko Stübner ret = zforce_start(ts); 586c6d81bd7SHeiko Stübner if (ret) 587c6d81bd7SHeiko Stübner return ret; 588c6d81bd7SHeiko Stübner 589c6d81bd7SHeiko Stübner return 0; 590c6d81bd7SHeiko Stübner } 591c6d81bd7SHeiko Stübner 592c6d81bd7SHeiko Stübner static void zforce_input_close(struct input_dev *dev) 593c6d81bd7SHeiko Stübner { 594c6d81bd7SHeiko Stübner struct zforce_ts *ts = input_get_drvdata(dev); 595c6d81bd7SHeiko Stübner struct i2c_client *client = ts->client; 596c6d81bd7SHeiko Stübner int ret; 597c6d81bd7SHeiko Stübner 598c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 599c6d81bd7SHeiko Stübner if (ret) 600c6d81bd7SHeiko Stübner dev_warn(&client->dev, "stopping zforce failed\n"); 601c6d81bd7SHeiko Stübner 602c6d81bd7SHeiko Stübner return; 603c6d81bd7SHeiko Stübner } 604c6d81bd7SHeiko Stübner 605c6d81bd7SHeiko Stübner #ifdef CONFIG_PM_SLEEP 606c6d81bd7SHeiko Stübner static int zforce_suspend(struct device *dev) 607c6d81bd7SHeiko Stübner { 608c6d81bd7SHeiko Stübner struct i2c_client *client = to_i2c_client(dev); 609c6d81bd7SHeiko Stübner struct zforce_ts *ts = i2c_get_clientdata(client); 610c6d81bd7SHeiko Stübner struct input_dev *input = ts->input; 611c6d81bd7SHeiko Stübner int ret = 0; 612c6d81bd7SHeiko Stübner 613c6d81bd7SHeiko Stübner mutex_lock(&input->mutex); 614c6d81bd7SHeiko Stübner ts->suspending = true; 615c6d81bd7SHeiko Stübner 616c6d81bd7SHeiko Stübner /* 617c6d81bd7SHeiko Stübner * When configured as a wakeup source device should always wake 618c6d81bd7SHeiko Stübner * the system, therefore start device if necessary. 619c6d81bd7SHeiko Stübner */ 620c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) { 621c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "suspend while being a wakeup source\n"); 622c6d81bd7SHeiko Stübner 623c6d81bd7SHeiko Stübner /* Need to start device, if not open, to be a wakeup source. */ 624c6d81bd7SHeiko Stübner if (!input->users) { 625c6d81bd7SHeiko Stübner ret = zforce_start(ts); 626c6d81bd7SHeiko Stübner if (ret) 627c6d81bd7SHeiko Stübner goto unlock; 628c6d81bd7SHeiko Stübner } 629c6d81bd7SHeiko Stübner 630c6d81bd7SHeiko Stübner enable_irq_wake(client->irq); 631c6d81bd7SHeiko Stübner } else if (input->users) { 632ad697b96SLuis Ortega dev_dbg(&client->dev, 633ad697b96SLuis Ortega "suspend without being a wakeup source\n"); 634c6d81bd7SHeiko Stübner 635c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 636c6d81bd7SHeiko Stübner if (ret) 637c6d81bd7SHeiko Stübner goto unlock; 638c6d81bd7SHeiko Stübner 639c6d81bd7SHeiko Stübner disable_irq(client->irq); 640c6d81bd7SHeiko Stübner } 641c6d81bd7SHeiko Stübner 642c6d81bd7SHeiko Stübner ts->suspended = true; 643c6d81bd7SHeiko Stübner 644c6d81bd7SHeiko Stübner unlock: 645c6d81bd7SHeiko Stübner ts->suspending = false; 646c6d81bd7SHeiko Stübner mutex_unlock(&input->mutex); 647c6d81bd7SHeiko Stübner 648c6d81bd7SHeiko Stübner return ret; 649c6d81bd7SHeiko Stübner } 650c6d81bd7SHeiko Stübner 651c6d81bd7SHeiko Stübner static int zforce_resume(struct device *dev) 652c6d81bd7SHeiko Stübner { 653c6d81bd7SHeiko Stübner struct i2c_client *client = to_i2c_client(dev); 654c6d81bd7SHeiko Stübner struct zforce_ts *ts = i2c_get_clientdata(client); 655c6d81bd7SHeiko Stübner struct input_dev *input = ts->input; 656c6d81bd7SHeiko Stübner int ret = 0; 657c6d81bd7SHeiko Stübner 658c6d81bd7SHeiko Stübner mutex_lock(&input->mutex); 659c6d81bd7SHeiko Stübner 660c6d81bd7SHeiko Stübner ts->suspended = false; 661c6d81bd7SHeiko Stübner 662c6d81bd7SHeiko Stübner if (device_may_wakeup(&client->dev)) { 663c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "resume from being a wakeup source\n"); 664c6d81bd7SHeiko Stübner 665c6d81bd7SHeiko Stübner disable_irq_wake(client->irq); 666c6d81bd7SHeiko Stübner 667c6d81bd7SHeiko Stübner /* need to stop device if it was not open on suspend */ 668c6d81bd7SHeiko Stübner if (!input->users) { 669c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 670c6d81bd7SHeiko Stübner if (ret) 671c6d81bd7SHeiko Stübner goto unlock; 672c6d81bd7SHeiko Stübner } 673c6d81bd7SHeiko Stübner } else if (input->users) { 674c6d81bd7SHeiko Stübner dev_dbg(&client->dev, "resume without being a wakeup source\n"); 675c6d81bd7SHeiko Stübner 676c6d81bd7SHeiko Stübner enable_irq(client->irq); 677c6d81bd7SHeiko Stübner 678c6d81bd7SHeiko Stübner ret = zforce_start(ts); 679c6d81bd7SHeiko Stübner if (ret < 0) 680c6d81bd7SHeiko Stübner goto unlock; 681c6d81bd7SHeiko Stübner } 682c6d81bd7SHeiko Stübner 683c6d81bd7SHeiko Stübner unlock: 684c6d81bd7SHeiko Stübner mutex_unlock(&input->mutex); 685c6d81bd7SHeiko Stübner 686c6d81bd7SHeiko Stübner return ret; 687c6d81bd7SHeiko Stübner } 688c6d81bd7SHeiko Stübner #endif 689c6d81bd7SHeiko Stübner 690c6d81bd7SHeiko Stübner static SIMPLE_DEV_PM_OPS(zforce_pm_ops, zforce_suspend, zforce_resume); 691c6d81bd7SHeiko Stübner 692c6d81bd7SHeiko Stübner static void zforce_reset(void *data) 693c6d81bd7SHeiko Stübner { 694c6d81bd7SHeiko Stübner struct zforce_ts *ts = data; 695c6d81bd7SHeiko Stübner 696c6d81bd7SHeiko Stübner gpio_set_value(ts->pdata->gpio_rst, 0); 69739740370SHeiko Stuebner 69839740370SHeiko Stuebner udelay(10); 69939740370SHeiko Stuebner 70039740370SHeiko Stuebner if (!IS_ERR(ts->reg_vdd)) 70139740370SHeiko Stuebner regulator_disable(ts->reg_vdd); 702c6d81bd7SHeiko Stübner } 703c6d81bd7SHeiko Stübner 7046f2e6c9bSHeiko Stübner static struct zforce_ts_platdata *zforce_parse_dt(struct device *dev) 7056f2e6c9bSHeiko Stübner { 7066f2e6c9bSHeiko Stübner struct zforce_ts_platdata *pdata; 7076f2e6c9bSHeiko Stübner struct device_node *np = dev->of_node; 7086f2e6c9bSHeiko Stübner 7096f2e6c9bSHeiko Stübner if (!np) 7106f2e6c9bSHeiko Stübner return ERR_PTR(-ENOENT); 7116f2e6c9bSHeiko Stübner 7126f2e6c9bSHeiko Stübner pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 7136f2e6c9bSHeiko Stübner if (!pdata) { 7146f2e6c9bSHeiko Stübner dev_err(dev, "failed to allocate platform data\n"); 7156f2e6c9bSHeiko Stübner return ERR_PTR(-ENOMEM); 7166f2e6c9bSHeiko Stübner } 7176f2e6c9bSHeiko Stübner 7186f2e6c9bSHeiko Stübner pdata->gpio_int = of_get_gpio(np, 0); 7196f2e6c9bSHeiko Stübner if (!gpio_is_valid(pdata->gpio_int)) { 7206f2e6c9bSHeiko Stübner dev_err(dev, "failed to get interrupt gpio\n"); 7216f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7226f2e6c9bSHeiko Stübner } 7236f2e6c9bSHeiko Stübner 7246f2e6c9bSHeiko Stübner pdata->gpio_rst = of_get_gpio(np, 1); 7256f2e6c9bSHeiko Stübner if (!gpio_is_valid(pdata->gpio_rst)) { 7266f2e6c9bSHeiko Stübner dev_err(dev, "failed to get reset gpio\n"); 7276f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7286f2e6c9bSHeiko Stübner } 7296f2e6c9bSHeiko Stübner 7306f2e6c9bSHeiko Stübner if (of_property_read_u32(np, "x-size", &pdata->x_max)) { 7316f2e6c9bSHeiko Stübner dev_err(dev, "failed to get x-size property\n"); 7326f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7336f2e6c9bSHeiko Stübner } 7346f2e6c9bSHeiko Stübner 7356f2e6c9bSHeiko Stübner if (of_property_read_u32(np, "y-size", &pdata->y_max)) { 7366f2e6c9bSHeiko Stübner dev_err(dev, "failed to get y-size property\n"); 7376f2e6c9bSHeiko Stübner return ERR_PTR(-EINVAL); 7386f2e6c9bSHeiko Stübner } 7396f2e6c9bSHeiko Stübner 7406f2e6c9bSHeiko Stübner return pdata; 7416f2e6c9bSHeiko Stübner } 7426f2e6c9bSHeiko Stübner 743c6d81bd7SHeiko Stübner static int zforce_probe(struct i2c_client *client, 744c6d81bd7SHeiko Stübner const struct i2c_device_id *id) 745c6d81bd7SHeiko Stübner { 746c6d81bd7SHeiko Stübner const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); 747c6d81bd7SHeiko Stübner struct zforce_ts *ts; 748c6d81bd7SHeiko Stübner struct input_dev *input_dev; 749c6d81bd7SHeiko Stübner int ret; 750c6d81bd7SHeiko Stübner 7516f2e6c9bSHeiko Stübner if (!pdata) { 7526f2e6c9bSHeiko Stübner pdata = zforce_parse_dt(&client->dev); 7536f2e6c9bSHeiko Stübner if (IS_ERR(pdata)) 7546f2e6c9bSHeiko Stübner return PTR_ERR(pdata); 7556f2e6c9bSHeiko Stübner } 756c6d81bd7SHeiko Stübner 757c6d81bd7SHeiko Stübner ts = devm_kzalloc(&client->dev, sizeof(struct zforce_ts), GFP_KERNEL); 758c6d81bd7SHeiko Stübner if (!ts) 759c6d81bd7SHeiko Stübner return -ENOMEM; 760c6d81bd7SHeiko Stübner 761c6d81bd7SHeiko Stübner ret = devm_gpio_request_one(&client->dev, pdata->gpio_int, GPIOF_IN, 762c6d81bd7SHeiko Stübner "zforce_ts_int"); 763c6d81bd7SHeiko Stübner if (ret) { 764c6d81bd7SHeiko Stübner dev_err(&client->dev, "request of gpio %d failed, %d\n", 765c6d81bd7SHeiko Stübner pdata->gpio_int, ret); 766c6d81bd7SHeiko Stübner return ret; 767c6d81bd7SHeiko Stübner } 768c6d81bd7SHeiko Stübner 769c6d81bd7SHeiko Stübner ret = devm_gpio_request_one(&client->dev, pdata->gpio_rst, 770c6d81bd7SHeiko Stübner GPIOF_OUT_INIT_LOW, "zforce_ts_rst"); 771c6d81bd7SHeiko Stübner if (ret) { 772c6d81bd7SHeiko Stübner dev_err(&client->dev, "request of gpio %d failed, %d\n", 773c6d81bd7SHeiko Stübner pdata->gpio_rst, ret); 774c6d81bd7SHeiko Stübner return ret; 775c6d81bd7SHeiko Stübner } 776c6d81bd7SHeiko Stübner 77739740370SHeiko Stuebner ts->reg_vdd = devm_regulator_get_optional(&client->dev, "vdd"); 77839740370SHeiko Stuebner if (IS_ERR(ts->reg_vdd)) { 77939740370SHeiko Stuebner ret = PTR_ERR(ts->reg_vdd); 78039740370SHeiko Stuebner if (ret == -EPROBE_DEFER) 78139740370SHeiko Stuebner return ret; 78239740370SHeiko Stuebner } else { 78339740370SHeiko Stuebner ret = regulator_enable(ts->reg_vdd); 78439740370SHeiko Stuebner if (ret) 78539740370SHeiko Stuebner return ret; 78639740370SHeiko Stuebner 78739740370SHeiko Stuebner /* 78839740370SHeiko Stuebner * according to datasheet add 100us grace time after regular 78939740370SHeiko Stuebner * regulator enable delay. 79039740370SHeiko Stuebner */ 79139740370SHeiko Stuebner udelay(100); 79239740370SHeiko Stuebner } 79339740370SHeiko Stuebner 794c6d81bd7SHeiko Stübner ret = devm_add_action(&client->dev, zforce_reset, ts); 795c6d81bd7SHeiko Stübner if (ret) { 796c6d81bd7SHeiko Stübner dev_err(&client->dev, "failed to register reset action, %d\n", 797c6d81bd7SHeiko Stübner ret); 79839740370SHeiko Stuebner 79939740370SHeiko Stuebner /* hereafter the regulator will be disabled by the action */ 80039740370SHeiko Stuebner if (!IS_ERR(ts->reg_vdd)) 80139740370SHeiko Stuebner regulator_disable(ts->reg_vdd); 80239740370SHeiko Stuebner 803c6d81bd7SHeiko Stübner return ret; 804c6d81bd7SHeiko Stübner } 805c6d81bd7SHeiko Stübner 806c6d81bd7SHeiko Stübner snprintf(ts->phys, sizeof(ts->phys), 807c6d81bd7SHeiko Stübner "%s/input0", dev_name(&client->dev)); 808c6d81bd7SHeiko Stübner 809c6d81bd7SHeiko Stübner input_dev = devm_input_allocate_device(&client->dev); 810c6d81bd7SHeiko Stübner if (!input_dev) { 811c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not allocate input device\n"); 812c6d81bd7SHeiko Stübner return -ENOMEM; 813c6d81bd7SHeiko Stübner } 814c6d81bd7SHeiko Stübner 815c6d81bd7SHeiko Stübner mutex_init(&ts->access_mutex); 816c6d81bd7SHeiko Stübner mutex_init(&ts->command_mutex); 817c6d81bd7SHeiko Stübner 818c6d81bd7SHeiko Stübner ts->pdata = pdata; 819c6d81bd7SHeiko Stübner ts->client = client; 820c6d81bd7SHeiko Stübner ts->input = input_dev; 821c6d81bd7SHeiko Stübner 822c6d81bd7SHeiko Stübner input_dev->name = "Neonode zForce touchscreen"; 823c6d81bd7SHeiko Stübner input_dev->phys = ts->phys; 824c6d81bd7SHeiko Stübner input_dev->id.bustype = BUS_I2C; 825c6d81bd7SHeiko Stübner 826c6d81bd7SHeiko Stübner input_dev->open = zforce_input_open; 827c6d81bd7SHeiko Stübner input_dev->close = zforce_input_close; 828c6d81bd7SHeiko Stübner 829c6d81bd7SHeiko Stübner __set_bit(EV_KEY, input_dev->evbit); 830c6d81bd7SHeiko Stübner __set_bit(EV_SYN, input_dev->evbit); 831c6d81bd7SHeiko Stübner __set_bit(EV_ABS, input_dev->evbit); 832c6d81bd7SHeiko Stübner 833c6d81bd7SHeiko Stübner /* For multi touch */ 834c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 835c6d81bd7SHeiko Stübner pdata->x_max, 0, 0); 836c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 837c6d81bd7SHeiko Stübner pdata->y_max, 0, 0); 838c6d81bd7SHeiko Stübner 839c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 840c6d81bd7SHeiko Stübner ZFORCE_MAX_AREA, 0, 0); 841c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 842c6d81bd7SHeiko Stübner ZFORCE_MAX_AREA, 0, 0); 843c6d81bd7SHeiko Stübner input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); 844c6d81bd7SHeiko Stübner input_mt_init_slots(input_dev, ZFORCE_REPORT_POINTS, INPUT_MT_DIRECT); 845c6d81bd7SHeiko Stübner 846c6d81bd7SHeiko Stübner input_set_drvdata(ts->input, ts); 847c6d81bd7SHeiko Stübner 848c6d81bd7SHeiko Stübner init_completion(&ts->command_done); 849c6d81bd7SHeiko Stübner 850c6d81bd7SHeiko Stübner /* 851c6d81bd7SHeiko Stübner * The zforce pulls the interrupt low when it has data ready. 852c6d81bd7SHeiko Stübner * After it is triggered the isr thread runs until all the available 853c6d81bd7SHeiko Stübner * packets have been read and the interrupt is high again. 854c6d81bd7SHeiko Stübner * Therefore we can trigger the interrupt anytime it is low and do 855c6d81bd7SHeiko Stübner * not need to limit it to the interrupt edge. 856c6d81bd7SHeiko Stübner */ 857499e6127SHeiko Stübner ret = devm_request_threaded_irq(&client->dev, client->irq, 858499e6127SHeiko Stübner zforce_irq, zforce_irq_thread, 859c6d81bd7SHeiko Stübner IRQF_TRIGGER_LOW | IRQF_ONESHOT, 860c6d81bd7SHeiko Stübner input_dev->name, ts); 861c6d81bd7SHeiko Stübner if (ret) { 862c6d81bd7SHeiko Stübner dev_err(&client->dev, "irq %d request failed\n", client->irq); 863c6d81bd7SHeiko Stübner return ret; 864c6d81bd7SHeiko Stübner } 865c6d81bd7SHeiko Stübner 866c6d81bd7SHeiko Stübner i2c_set_clientdata(client, ts); 867c6d81bd7SHeiko Stübner 868c6d81bd7SHeiko Stübner /* let the controller boot */ 869c6d81bd7SHeiko Stübner gpio_set_value(pdata->gpio_rst, 1); 870c6d81bd7SHeiko Stübner 871c6d81bd7SHeiko Stübner ts->command_waiting = NOTIFICATION_BOOTCOMPLETE; 872c6d81bd7SHeiko Stübner if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) 873c6d81bd7SHeiko Stübner dev_warn(&client->dev, "bootcomplete timed out\n"); 874c6d81bd7SHeiko Stübner 875c6d81bd7SHeiko Stübner /* need to start device to get version information */ 876c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_INITIALIZE); 877c6d81bd7SHeiko Stübner if (ret) { 878c6d81bd7SHeiko Stübner dev_err(&client->dev, "unable to initialize, %d\n", ret); 879c6d81bd7SHeiko Stübner return ret; 880c6d81bd7SHeiko Stübner } 881c6d81bd7SHeiko Stübner 882deb49819SLuis Ortega /* this gets the firmware version among other information */ 883c6d81bd7SHeiko Stübner ret = zforce_command_wait(ts, COMMAND_STATUS); 884c6d81bd7SHeiko Stübner if (ret < 0) { 885c6d81bd7SHeiko Stübner dev_err(&client->dev, "couldn't get status, %d\n", ret); 886c6d81bd7SHeiko Stübner zforce_stop(ts); 887c6d81bd7SHeiko Stübner return ret; 888c6d81bd7SHeiko Stübner } 889c6d81bd7SHeiko Stübner 890c6d81bd7SHeiko Stübner /* stop device and put it into sleep until it is opened */ 891c6d81bd7SHeiko Stübner ret = zforce_stop(ts); 892c6d81bd7SHeiko Stübner if (ret < 0) 893c6d81bd7SHeiko Stübner return ret; 894c6d81bd7SHeiko Stübner 895c6d81bd7SHeiko Stübner device_set_wakeup_capable(&client->dev, true); 896c6d81bd7SHeiko Stübner 897c6d81bd7SHeiko Stübner ret = input_register_device(input_dev); 898c6d81bd7SHeiko Stübner if (ret) { 899c6d81bd7SHeiko Stübner dev_err(&client->dev, "could not register input device, %d\n", 900c6d81bd7SHeiko Stübner ret); 901c6d81bd7SHeiko Stübner return ret; 902c6d81bd7SHeiko Stübner } 903c6d81bd7SHeiko Stübner 904c6d81bd7SHeiko Stübner return 0; 905c6d81bd7SHeiko Stübner } 906c6d81bd7SHeiko Stübner 907c6d81bd7SHeiko Stübner static struct i2c_device_id zforce_idtable[] = { 908c6d81bd7SHeiko Stübner { "zforce-ts", 0 }, 909c6d81bd7SHeiko Stübner { } 910c6d81bd7SHeiko Stübner }; 911c6d81bd7SHeiko Stübner MODULE_DEVICE_TABLE(i2c, zforce_idtable); 912c6d81bd7SHeiko Stübner 9136f2e6c9bSHeiko Stübner #ifdef CONFIG_OF 914f3f63193SJingoo Han static const struct of_device_id zforce_dt_idtable[] = { 9156f2e6c9bSHeiko Stübner { .compatible = "neonode,zforce" }, 9166f2e6c9bSHeiko Stübner {}, 9176f2e6c9bSHeiko Stübner }; 9186f2e6c9bSHeiko Stübner MODULE_DEVICE_TABLE(of, zforce_dt_idtable); 9196f2e6c9bSHeiko Stübner #endif 9206f2e6c9bSHeiko Stübner 921c6d81bd7SHeiko Stübner static struct i2c_driver zforce_driver = { 922c6d81bd7SHeiko Stübner .driver = { 923c6d81bd7SHeiko Stübner .owner = THIS_MODULE, 924c6d81bd7SHeiko Stübner .name = "zforce-ts", 925c6d81bd7SHeiko Stübner .pm = &zforce_pm_ops, 9266f2e6c9bSHeiko Stübner .of_match_table = of_match_ptr(zforce_dt_idtable), 927c6d81bd7SHeiko Stübner }, 928c6d81bd7SHeiko Stübner .probe = zforce_probe, 929c6d81bd7SHeiko Stübner .id_table = zforce_idtable, 930c6d81bd7SHeiko Stübner }; 931c6d81bd7SHeiko Stübner 932c6d81bd7SHeiko Stübner module_i2c_driver(zforce_driver); 933c6d81bd7SHeiko Stübner 934c6d81bd7SHeiko Stübner MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); 935c6d81bd7SHeiko Stübner MODULE_DESCRIPTION("zForce TouchScreen Driver"); 936c6d81bd7SHeiko Stübner MODULE_LICENSE("GPL"); 937