1177387Sgnn// SPDX-License-Identifier: GPL-2.0 2177388Sgnn/* 3177387Sgnn * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de> 4177387Sgnn * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support) 5177387Sgnn * Lothar Wa��mann <LW@KARO-electronics.de> (DT support) 6177388Sgnn * Dario Binacchi <dario.binacchi@amarulasolutions.com> (regmap support) 7177388Sgnn */ 8177388Sgnn 9177388Sgnn/* 10177388Sgnn * This is a driver for the EDT "Polytouch" family of touch controllers 11177388Sgnn * based on the FocalTech FT5x06 line of chips. 12177388Sgnn * 13177388Sgnn * Development of this driver has been sponsored by Glyn: 14177388Sgnn * http://www.glyn.com/Products/Displays 15177388Sgnn */ 16177388Sgnn 17177388Sgnn#include <linux/debugfs.h> 18177388Sgnn#include <linux/delay.h> 19177388Sgnn#include <linux/gpio/consumer.h> 20177388Sgnn#include <linux/i2c.h> 21177388Sgnn#include <linux/interrupt.h> 22177388Sgnn#include <linux/input.h> 23177388Sgnn#include <linux/input/mt.h> 24177388Sgnn#include <linux/input/touchscreen.h> 25177388Sgnn#include <linux/irq.h> 26177388Sgnn#include <linux/kernel.h> 27177387Sgnn#include <linux/module.h> 28177387Sgnn#include <linux/property.h> 29177387Sgnn#include <linux/ratelimit.h> 30177387Sgnn#include <linux/regmap.h> 31177387Sgnn#include <linux/regulator/consumer.h> 32177387Sgnn#include <linux/slab.h> 33177387Sgnn#include <linux/uaccess.h> 34177387Sgnn 35177387Sgnn#include <asm/unaligned.h> 36177387Sgnn 37177387Sgnn#define WORK_REGISTER_THRESHOLD 0x00 38177387Sgnn#define WORK_REGISTER_REPORT_RATE 0x08 39177387Sgnn#define WORK_REGISTER_GAIN 0x30 40177387Sgnn#define WORK_REGISTER_OFFSET 0x31 41213327Sgnn#define WORK_REGISTER_NUM_X 0x33 42213327Sgnn#define WORK_REGISTER_NUM_Y 0x34 43177387Sgnn 44177387Sgnn#define PMOD_REGISTER_ACTIVE 0x00 45177387Sgnn#define PMOD_REGISTER_HIBERNATE 0x03 46177387Sgnn 47177387Sgnn#define M09_REGISTER_THRESHOLD 0x80 48177387Sgnn#define M09_REGISTER_GAIN 0x92 49177387Sgnn#define M09_REGISTER_OFFSET 0x93 50177387Sgnn#define M09_REGISTER_NUM_X 0x94 51177387Sgnn#define M09_REGISTER_NUM_Y 0x95 52177387Sgnn 53177387Sgnn#define M12_REGISTER_REPORT_RATE 0x88 54177387Sgnn 55177387Sgnn#define EV_REGISTER_THRESHOLD 0x40 56177387Sgnn#define EV_REGISTER_GAIN 0x41 57177387Sgnn#define EV_REGISTER_OFFSET_Y 0x45 58177387Sgnn#define EV_REGISTER_OFFSET_X 0x46 59177387Sgnn 60177387Sgnn#define NO_REGISTER 0xff 61177387Sgnn 62177387Sgnn#define WORK_REGISTER_OPMODE 0x3c 63177387Sgnn#define FACTORY_REGISTER_OPMODE 0x01 64177387Sgnn#define PMOD_REGISTER_OPMODE 0xa5 65177387Sgnn 66178456Sgnn#define TOUCH_EVENT_DOWN 0x00 67177387Sgnn#define TOUCH_EVENT_UP 0x01 68177387Sgnn#define TOUCH_EVENT_ON 0x02 69177387Sgnn#define TOUCH_EVENT_RESERVED 0x03 70177387Sgnn 71177387Sgnn#define EDT_NAME_LEN 23 72177387Sgnn#define EDT_SWITCH_MODE_RETRIES 10 73177387Sgnn#define EDT_SWITCH_MODE_DELAY 5 /* msec */ 74177387Sgnn#define EDT_RAW_DATA_RETRIES 100 75177387Sgnn#define EDT_RAW_DATA_DELAY 1000 /* usec */ 76177387Sgnn 77177387Sgnn#define EDT_DEFAULT_NUM_X 1024 78177387Sgnn#define EDT_DEFAULT_NUM_Y 1024 79177387Sgnn 80177387Sgnn#define M06_REG_CMD(factory) ((factory) ? 0xf3 : 0xfc) 81177387Sgnn#define M06_REG_ADDR(factory, addr) ((factory) ? (addr) & 0x7f : (addr) & 0x3f) 82177387Sgnn 83177387Sgnnenum edt_pmode { 84177387Sgnn EDT_PMODE_NOT_SUPPORTED, 85177387Sgnn EDT_PMODE_HIBERNATE, 86177387Sgnn EDT_PMODE_POWEROFF, 87177387Sgnn}; 88177387Sgnn 89177387Sgnnenum edt_ver { 90177387Sgnn EDT_M06, 91178456Sgnn EDT_M09, 92178456Sgnn EDT_M12, 93177387Sgnn EV_FT, 94177387Sgnn GENERIC_FT, 95177387Sgnn}; 96178456Sgnn 97179528Sgnnstruct edt_reg_addr { 98177387Sgnn int reg_threshold; 99177387Sgnn int reg_report_rate; 100177872Sgnn int reg_gain; 101177387Sgnn int reg_offset; 102177387Sgnn int reg_offset_x; 103177387Sgnn int reg_offset_y; 104177387Sgnn int reg_num_x; 105177387Sgnn int reg_num_y; 106177387Sgnn}; 107177387Sgnn 108177387Sgnnstruct edt_ft5x06_ts_data { 109177387Sgnn struct i2c_client *client; 110177387Sgnn struct input_dev *input; 111177387Sgnn struct touchscreen_properties prop; 112177387Sgnn u16 num_x; 113177387Sgnn u16 num_y; 114177387Sgnn struct regulator *vcc; 115177387Sgnn struct regulator *iovcc; 116177387Sgnn 117177387Sgnn struct gpio_desc *reset_gpio; 118177387Sgnn struct gpio_desc *wake_gpio; 119177872Sgnn 120177872Sgnn struct regmap *regmap; 121177872Sgnn 122177872Sgnn#if defined(CONFIG_DEBUG_FS) 123177872Sgnn struct dentry *debug_dir; 124177387Sgnn u8 *raw_buffer; 125177387Sgnn size_t raw_bufsize; 126177387Sgnn#endif 127177387Sgnn 128177387Sgnn struct mutex mutex; 129177387Sgnn bool factory_mode; 130177387Sgnn enum edt_pmode suspend_mode; 131177387Sgnn int threshold; 132177387Sgnn int gain; 133177387Sgnn int offset; 134177387Sgnn int offset_x; 135177387Sgnn int offset_y; 136177387Sgnn int report_rate; 137177387Sgnn int max_support_points; 138177387Sgnn int point_len; 139177387Sgnn u8 tdata_cmd; 140177387Sgnn int tdata_len; 141177387Sgnn int tdata_offset; 142177387Sgnn 143177387Sgnn char name[EDT_NAME_LEN]; 144177387Sgnn char fw_version[EDT_NAME_LEN]; 145177387Sgnn 146177387Sgnn struct edt_reg_addr reg_addr; 147177387Sgnn enum edt_ver version; 148177387Sgnn unsigned int crc_errors; 149177387Sgnn unsigned int header_errors; 150177387Sgnn}; 151177387Sgnn 152177387Sgnnstruct edt_i2c_chip_data { 153177387Sgnn int max_support_points; 154177387Sgnn}; 155177387Sgnn 156177387Sgnnstatic const struct regmap_config edt_ft5x06_i2c_regmap_config = { 157177387Sgnn .reg_bits = 8, 158177387Sgnn .val_bits = 8, 159177387Sgnn}; 160177387Sgnn 161177387Sgnnstatic bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, 162177387Sgnn u8 *buf, int buflen) 163177387Sgnn{ 164177387Sgnn int i; 165177387Sgnn u8 crc = 0; 166177387Sgnn 167177387Sgnn for (i = 0; i < buflen - 1; i++) 168177387Sgnn crc ^= buf[i]; 169177387Sgnn 170177387Sgnn if (crc != buf[buflen - 1]) { 171177387Sgnn tsdata->crc_errors++; 172177872Sgnn dev_err_ratelimited(&tsdata->client->dev, 173177387Sgnn "crc error: 0x%02x expected, got 0x%02x\n", 174177387Sgnn crc, buf[buflen - 1]); 175177387Sgnn return false; 176177387Sgnn } 177177387Sgnn 178177387Sgnn return true; 179177387Sgnn} 180178456Sgnn 181178456Sgnnstatic int edt_M06_i2c_read(void *context, const void *reg_buf, size_t reg_size, 182178456Sgnn void *val_buf, size_t val_size) 183178456Sgnn{ 184178456Sgnn struct device *dev = context; 185178456Sgnn struct i2c_client *i2c = to_i2c_client(dev); 186179528Sgnn struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c); 187178456Sgnn struct i2c_msg xfer[2]; 188178456Sgnn bool reg_read = false; 189178456Sgnn u8 addr; 190178456Sgnn u8 wlen; 191178456Sgnn u8 wbuf[4], rbuf[3]; 192177872Sgnn int ret; 193177387Sgnn 194177387Sgnn addr = *((u8 *)reg_buf); 195177387Sgnn wbuf[0] = addr; 196177387Sgnn switch (addr) { 197177387Sgnn case 0xf5: 198177387Sgnn wlen = 3; 199177387Sgnn wbuf[0] = 0xf5; 200177387Sgnn wbuf[1] = 0xe; 201177387Sgnn wbuf[2] = *((u8 *)val_buf); 202177387Sgnn break; 203177387Sgnn case 0xf9: 204177387Sgnn wlen = 1; 205177387Sgnn break; 206177387Sgnn default: 207177387Sgnn wlen = 2; 208177387Sgnn reg_read = true; 209177387Sgnn wbuf[0] = M06_REG_CMD(tsdata->factory_mode); 210177387Sgnn wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr); 211177387Sgnn wbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; 212177387Sgnn } 213177387Sgnn 214177387Sgnn xfer[0].addr = i2c->addr; 215177387Sgnn xfer[0].flags = 0; 216177387Sgnn xfer[0].len = wlen; 217177387Sgnn xfer[0].buf = wbuf; 218177387Sgnn 219177387Sgnn xfer[1].addr = i2c->addr; 220177387Sgnn xfer[1].flags = I2C_M_RD; 221177872Sgnn xfer[1].len = reg_read ? 2 : val_size; 222177872Sgnn xfer[1].buf = reg_read ? rbuf : val_buf; 223178456Sgnn 224177872Sgnn ret = i2c_transfer(i2c->adapter, xfer, 2); 225177872Sgnn if (ret != 2) { 226177872Sgnn if (ret < 0) 227178456Sgnn return ret; 228177872Sgnn 229177872Sgnn return -EIO; 230177872Sgnn } 231177872Sgnn 232177872Sgnn if (addr == 0xf9) { 233177872Sgnn u8 *buf = (u8 *)val_buf; 234177872Sgnn 235177872Sgnn if (buf[0] != 0xaa || buf[1] != 0xaa || 236177872Sgnn buf[2] != val_size) { 237177872Sgnn tsdata->header_errors++; 238177872Sgnn dev_err_ratelimited(dev, 239177872Sgnn "Unexpected header: %02x%02x%02x\n", 240177872Sgnn buf[0], buf[1], buf[2]); 241177872Sgnn return -EIO; 242177872Sgnn } 243177872Sgnn 244177872Sgnn if (!edt_ft5x06_ts_check_crc(tsdata, val_buf, val_size)) 245177872Sgnn return -EIO; 246177872Sgnn } else if (reg_read) { 247177872Sgnn wbuf[2] = rbuf[0]; 248177872Sgnn wbuf[3] = rbuf[1]; 249177872Sgnn if (!edt_ft5x06_ts_check_crc(tsdata, wbuf, 4)) 250177872Sgnn return -EIO; 251177872Sgnn 252177872Sgnn *((u8 *)val_buf) = rbuf[0]; 253177872Sgnn } 254179528Sgnn 255177872Sgnn return 0; 256177872Sgnn} 257177872Sgnn 258177872Sgnnstatic int edt_M06_i2c_write(void *context, const void *data, size_t count) 259177872Sgnn{ 260177872Sgnn struct device *dev = context; 261177872Sgnn struct i2c_client *i2c = to_i2c_client(dev); 262177872Sgnn struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c); 263177872Sgnn u8 addr, val; 264177872Sgnn u8 wbuf[4]; 265177872Sgnn struct i2c_msg xfer; 266177872Sgnn int ret; 267177872Sgnn 268177872Sgnn addr = *((u8 *)data); 269177872Sgnn val = *((u8 *)data + 1); 270177872Sgnn 271177872Sgnn wbuf[0] = M06_REG_CMD(tsdata->factory_mode); 272177872Sgnn wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr); 273177872Sgnn wbuf[2] = val; 274177872Sgnn wbuf[3] = wbuf[0] ^ wbuf[1] ^ wbuf[2]; 275177872Sgnn 276177872Sgnn xfer.addr = i2c->addr; 277177872Sgnn xfer.flags = 0; 278177872Sgnn xfer.len = 4; 279177872Sgnn xfer.buf = wbuf; 280177872Sgnn 281177872Sgnn ret = i2c_transfer(i2c->adapter, &xfer, 1); 282177872Sgnn if (ret != 1) { 283177872Sgnn if (ret < 0) 284177872Sgnn return ret; 285177872Sgnn 286177872Sgnn return -EIO; 287177872Sgnn } 288177387Sgnn 289177387Sgnn return 0; 290177387Sgnn} 291177387Sgnn 292177387Sgnnstatic const struct regmap_config edt_M06_i2c_regmap_config = { 293177387Sgnn .reg_bits = 8, 294177387Sgnn .val_bits = 8, 295178456Sgnn .read = edt_M06_i2c_read, 296177387Sgnn .write = edt_M06_i2c_write, 297177387Sgnn}; 298177387Sgnn 299177387Sgnnstatic irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) 300179528Sgnn{ 301177387Sgnn struct edt_ft5x06_ts_data *tsdata = dev_id; 302177387Sgnn struct device *dev = &tsdata->client->dev; 303177387Sgnn u8 rdbuf[63]; 304177387Sgnn int i, type, x, y, id; 305177387Sgnn int error; 306177387Sgnn 307177387Sgnn memset(rdbuf, 0, sizeof(rdbuf)); 308177387Sgnn error = regmap_bulk_read(tsdata->regmap, tsdata->tdata_cmd, rdbuf, 309177387Sgnn tsdata->tdata_len); 310177387Sgnn if (error) { 311177387Sgnn dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", 312177387Sgnn error); 313177387Sgnn goto out; 314177387Sgnn } 315177387Sgnn 316177387Sgnn for (i = 0; i < tsdata->max_support_points; i++) { 317177387Sgnn u8 *buf = &rdbuf[i * tsdata->point_len + tsdata->tdata_offset]; 318177387Sgnn 319177387Sgnn type = buf[0] >> 6; 320177387Sgnn /* ignore Reserved events */ 321177387Sgnn if (type == TOUCH_EVENT_RESERVED) 322177387Sgnn continue; 323177387Sgnn 324177387Sgnn /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */ 325177387Sgnn if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN) 326177387Sgnn continue; 327177387Sgnn 328177387Sgnn x = get_unaligned_be16(buf) & 0x0fff; 329177387Sgnn y = get_unaligned_be16(buf + 2) & 0x0fff; 330177387Sgnn /* The FT5x26 send the y coordinate first */ 331177387Sgnn if (tsdata->version == EV_FT) 332177387Sgnn swap(x, y); 333177387Sgnn 334177387Sgnn id = (buf[2] >> 4) & 0x0f; 335177387Sgnn 336177387Sgnn input_mt_slot(tsdata->input, id); 337177387Sgnn if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, 338177387Sgnn type != TOUCH_EVENT_UP)) 339177387Sgnn touchscreen_report_pos(tsdata->input, &tsdata->prop, 340177387Sgnn x, y, true); 341177387Sgnn } 342177387Sgnn 343177387Sgnn input_mt_report_pointer_emulation(tsdata->input, true); 344177387Sgnn input_sync(tsdata->input); 345177387Sgnn 346177387Sgnnout: 347177387Sgnn return IRQ_HANDLED; 348177387Sgnn} 349177387Sgnn 350177387Sgnnstruct edt_ft5x06_attribute { 351177387Sgnn struct device_attribute dattr; 352177387Sgnn size_t field_offset; 353177387Sgnn u8 limit_low; 354177387Sgnn u8 limit_high; 355177387Sgnn u8 addr_m06; 356177387Sgnn u8 addr_m09; 357177387Sgnn u8 addr_ev; 358177387Sgnn}; 359177387Sgnn 360177387Sgnn#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \ 361177387Sgnn _limit_low, _limit_high) \ 362177387Sgnn struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ 363177872Sgnn .dattr = __ATTR(_field, _mode, \ 364178456Sgnn edt_ft5x06_setting_show, \ 365178456Sgnn edt_ft5x06_setting_store), \ 366178456Sgnn .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \ 367177872Sgnn .addr_m06 = _addr_m06, \ 368178456Sgnn .addr_m09 = _addr_m09, \ 369178456Sgnn .addr_ev = _addr_ev, \ 370178456Sgnn .limit_low = _limit_low, \ 371178456Sgnn .limit_high = _limit_high, \ 372179528Sgnn } 373203800Sru 374178456Sgnnstatic ssize_t edt_ft5x06_setting_show(struct device *dev, 375178456Sgnn struct device_attribute *dattr, 376178456Sgnn char *buf) 377178456Sgnn{ 378177872Sgnn struct i2c_client *client = to_i2c_client(dev); 379177387Sgnn struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 380177387Sgnn struct edt_ft5x06_attribute *attr = 381177387Sgnn container_of(dattr, struct edt_ft5x06_attribute, dattr); 382177387Sgnn u8 *field = (u8 *)tsdata + attr->field_offset; 383177387Sgnn unsigned int val; 384177387Sgnn size_t count = 0; 385177387Sgnn int error = 0; 386177387Sgnn u8 addr; 387177387Sgnn 388177387Sgnn mutex_lock(&tsdata->mutex); 389177872Sgnn 390177387Sgnn if (tsdata->factory_mode) { 391177387Sgnn error = -EIO; 392177387Sgnn goto out; 393177387Sgnn } 394177387Sgnn 395177387Sgnn switch (tsdata->version) { 396177872Sgnn case EDT_M06: 397178456Sgnn addr = attr->addr_m06; 398203800Sru break; 399178456Sgnn 400178456Sgnn case EDT_M09: 401178456Sgnn case EDT_M12: 402178456Sgnn case GENERIC_FT: 403178456Sgnn addr = attr->addr_m09; 404177872Sgnn break; 405213327Sgnn 406213327Sgnn case EV_FT: 407213327Sgnn addr = attr->addr_ev; 408178456Sgnn break; 409213327Sgnn 410178456Sgnn default: 411213327Sgnn error = -ENODEV; 412178456Sgnn goto out; 413213327Sgnn } 414213327Sgnn 415213327Sgnn if (addr != NO_REGISTER) { 416213327Sgnn error = regmap_read(tsdata->regmap, addr, &val); 417178456Sgnn if (error) { 418213327Sgnn dev_err(&tsdata->client->dev, 419213327Sgnn "Failed to fetch attribute %s, error %d\n", 420213327Sgnn dattr->attr.name, error); 421178456Sgnn goto out; 422215409Sgnn } 423213327Sgnn } else { 424213327Sgnn val = *field; 425213327Sgnn } 426213327Sgnn 427213327Sgnn if (val != *field) { 428213327Sgnn dev_warn(&tsdata->client->dev, 429213327Sgnn "%s: read (%d) and stored value (%d) differ\n", 430177872Sgnn dattr->attr.name, val, *field); 431177872Sgnn *field = val; 432177387Sgnn } 433177387Sgnn 434177387Sgnn count = sysfs_emit(buf, "%d\n", val); 435177387Sgnnout: 436177387Sgnn mutex_unlock(&tsdata->mutex); 437177387Sgnn return error ?: count; 438177387Sgnn} 439177387Sgnn 440177387Sgnnstatic ssize_t edt_ft5x06_setting_store(struct device *dev, 441177387Sgnn struct device_attribute *dattr, 442177387Sgnn const char *buf, size_t count) 443177387Sgnn{ 444177387Sgnn struct i2c_client *client = to_i2c_client(dev); 445177387Sgnn struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 446177387Sgnn struct edt_ft5x06_attribute *attr = 447177387Sgnn container_of(dattr, struct edt_ft5x06_attribute, dattr); 448177387Sgnn u8 *field = (u8 *)tsdata + attr->field_offset; 449177387Sgnn unsigned int val; 450177387Sgnn int error; 451177387Sgnn u8 addr; 452177387Sgnn 453177872Sgnn mutex_lock(&tsdata->mutex); 454177387Sgnn 455177872Sgnn if (tsdata->factory_mode) { 456177872Sgnn error = -EIO; 457177872Sgnn goto out; 458178456Sgnn } 459178456Sgnn 460178456Sgnn error = kstrtouint(buf, 0, &val); 461179528Sgnn if (error) 462177387Sgnn goto out; 463179528Sgnn 464177387Sgnn if (val < attr->limit_low || val > attr->limit_high) { 465177387Sgnn error = -ERANGE; 466179528Sgnn goto out; 467177387Sgnn } 468177387Sgnn 469177387Sgnn switch (tsdata->version) { 470177387Sgnn case EDT_M06: 471177387Sgnn addr = attr->addr_m06; 472177387Sgnn break; 473177387Sgnn 474177387Sgnn case EDT_M09: 475177387Sgnn case EDT_M12: 476177387Sgnn case GENERIC_FT: 477177387Sgnn addr = attr->addr_m09; 478177387Sgnn break; 479178456Sgnn 480177387Sgnn case EV_FT: 481177387Sgnn addr = attr->addr_ev; 482177387Sgnn break; 483177387Sgnn 484177387Sgnn default: 485177387Sgnn error = -ENODEV; 486177387Sgnn goto out; 487177387Sgnn } 488177387Sgnn 489177387Sgnn if (addr != NO_REGISTER) { 490177387Sgnn error = regmap_write(tsdata->regmap, addr, val); 491177387Sgnn if (error) { 492177387Sgnn dev_err(&tsdata->client->dev, 493177387Sgnn "Failed to update attribute %s, error: %d\n", 494177387Sgnn dattr->attr.name, error); 495177387Sgnn goto out; 496177387Sgnn } 497177387Sgnn } 498178456Sgnn *field = val; 499178456Sgnn 500178456Sgnnout: 501178456Sgnn mutex_unlock(&tsdata->mutex); 502178456Sgnn return error ?: count; 503178456Sgnn} 504179528Sgnn 505179528Sgnn/* m06, m09: range 0-31, m12: range 0-5 */ 506179528Sgnnstatic EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 507177387Sgnn M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31); 508177387Sgnn/* m06, m09: range 0-31, m12: range 0-16 */ 509177387Sgnnstatic EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 510177387Sgnn M09_REGISTER_OFFSET, NO_REGISTER, 0, 31); 511177387Sgnn/* m06, m09, m12: no supported, ev_ft: range 0-80 */ 512177387Sgnnstatic EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 513177387Sgnn EV_REGISTER_OFFSET_X, 0, 80); 514178456Sgnn/* m06, m09, m12: no supported, ev_ft: range 0-80 */ 515178456Sgnnstatic EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 516179528Sgnn EV_REGISTER_OFFSET_Y, 0, 80); 517179528Sgnn/* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */ 518177387Sgnnstatic EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, 519178456Sgnn M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255); 520178456Sgnn/* m06: range 3 to 14, m12: range 1 to 255 */ 521179528Sgnnstatic EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, 522179528Sgnn M12_REGISTER_REPORT_RATE, NO_REGISTER, 0, 255); 523177387Sgnn 524177387Sgnnstatic ssize_t model_show(struct device *dev, struct device_attribute *attr, 525177387Sgnn char *buf) 526{ 527 struct i2c_client *client = to_i2c_client(dev); 528 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 529 530 return sysfs_emit(buf, "%s\n", tsdata->name); 531} 532 533static DEVICE_ATTR_RO(model); 534 535static ssize_t fw_version_show(struct device *dev, 536 struct device_attribute *attr, char *buf) 537{ 538 struct i2c_client *client = to_i2c_client(dev); 539 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 540 541 return sysfs_emit(buf, "%s\n", tsdata->fw_version); 542} 543 544static DEVICE_ATTR_RO(fw_version); 545 546/* m06 only */ 547static ssize_t header_errors_show(struct device *dev, 548 struct device_attribute *attr, char *buf) 549{ 550 struct i2c_client *client = to_i2c_client(dev); 551 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 552 553 return sysfs_emit(buf, "%d\n", tsdata->header_errors); 554} 555 556static DEVICE_ATTR_RO(header_errors); 557 558/* m06 only */ 559static ssize_t crc_errors_show(struct device *dev, 560 struct device_attribute *attr, char *buf) 561{ 562 struct i2c_client *client = to_i2c_client(dev); 563 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 564 565 return sysfs_emit(buf, "%d\n", tsdata->crc_errors); 566} 567 568static DEVICE_ATTR_RO(crc_errors); 569 570static struct attribute *edt_ft5x06_attrs[] = { 571 &edt_ft5x06_attr_gain.dattr.attr, 572 &edt_ft5x06_attr_offset.dattr.attr, 573 &edt_ft5x06_attr_offset_x.dattr.attr, 574 &edt_ft5x06_attr_offset_y.dattr.attr, 575 &edt_ft5x06_attr_threshold.dattr.attr, 576 &edt_ft5x06_attr_report_rate.dattr.attr, 577 &dev_attr_model.attr, 578 &dev_attr_fw_version.attr, 579 &dev_attr_header_errors.attr, 580 &dev_attr_crc_errors.attr, 581 NULL 582}; 583ATTRIBUTE_GROUPS(edt_ft5x06); 584 585static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata) 586{ 587 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 588 struct regmap *regmap = tsdata->regmap; 589 590 regmap_write(regmap, reg_addr->reg_threshold, tsdata->threshold); 591 regmap_write(regmap, reg_addr->reg_gain, tsdata->gain); 592 if (reg_addr->reg_offset != NO_REGISTER) 593 regmap_write(regmap, reg_addr->reg_offset, tsdata->offset); 594 if (reg_addr->reg_offset_x != NO_REGISTER) 595 regmap_write(regmap, reg_addr->reg_offset_x, tsdata->offset_x); 596 if (reg_addr->reg_offset_y != NO_REGISTER) 597 regmap_write(regmap, reg_addr->reg_offset_y, tsdata->offset_y); 598 if (reg_addr->reg_report_rate != NO_REGISTER) 599 regmap_write(regmap, reg_addr->reg_report_rate, 600 tsdata->report_rate); 601} 602 603#ifdef CONFIG_DEBUG_FS 604static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 605{ 606 struct i2c_client *client = tsdata->client; 607 int retries = EDT_SWITCH_MODE_RETRIES; 608 unsigned int val; 609 int error; 610 611 if (tsdata->version != EDT_M06) { 612 dev_err(&client->dev, 613 "No factory mode support for non-M06 devices\n"); 614 return -EINVAL; 615 } 616 617 disable_irq(client->irq); 618 619 if (!tsdata->raw_buffer) { 620 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * 621 sizeof(u16); 622 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); 623 if (!tsdata->raw_buffer) { 624 error = -ENOMEM; 625 goto err_out; 626 } 627 } 628 629 /* mode register is 0x3c when in the work mode */ 630 error = regmap_write(tsdata->regmap, WORK_REGISTER_OPMODE, 0x03); 631 if (error) { 632 dev_err(&client->dev, 633 "failed to switch to factory mode, error %d\n", error); 634 goto err_out; 635 } 636 637 tsdata->factory_mode = true; 638 do { 639 mdelay(EDT_SWITCH_MODE_DELAY); 640 /* mode register is 0x01 when in factory mode */ 641 error = regmap_read(tsdata->regmap, FACTORY_REGISTER_OPMODE, 642 &val); 643 if (!error && val == 0x03) 644 break; 645 } while (--retries > 0); 646 647 if (retries == 0) { 648 dev_err(&client->dev, "not in factory mode after %dms.\n", 649 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 650 error = -EIO; 651 goto err_out; 652 } 653 654 return 0; 655 656err_out: 657 kfree(tsdata->raw_buffer); 658 tsdata->raw_buffer = NULL; 659 tsdata->factory_mode = false; 660 enable_irq(client->irq); 661 662 return error; 663} 664 665static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) 666{ 667 struct i2c_client *client = tsdata->client; 668 int retries = EDT_SWITCH_MODE_RETRIES; 669 unsigned int val; 670 int error; 671 672 /* mode register is 0x01 when in the factory mode */ 673 error = regmap_write(tsdata->regmap, FACTORY_REGISTER_OPMODE, 0x1); 674 if (error) { 675 dev_err(&client->dev, 676 "failed to switch to work mode, error: %d\n", error); 677 return error; 678 } 679 680 tsdata->factory_mode = false; 681 682 do { 683 mdelay(EDT_SWITCH_MODE_DELAY); 684 /* mode register is 0x01 when in factory mode */ 685 error = regmap_read(tsdata->regmap, WORK_REGISTER_OPMODE, &val); 686 if (!error && val == 0x01) 687 break; 688 } while (--retries > 0); 689 690 if (retries == 0) { 691 dev_err(&client->dev, "not in work mode after %dms.\n", 692 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 693 tsdata->factory_mode = true; 694 return -EIO; 695 } 696 697 kfree(tsdata->raw_buffer); 698 tsdata->raw_buffer = NULL; 699 700 edt_ft5x06_restore_reg_parameters(tsdata); 701 enable_irq(client->irq); 702 703 return 0; 704} 705 706static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) 707{ 708 struct edt_ft5x06_ts_data *tsdata = data; 709 710 *mode = tsdata->factory_mode; 711 712 return 0; 713}; 714 715static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) 716{ 717 struct edt_ft5x06_ts_data *tsdata = data; 718 int retval = 0; 719 720 if (mode > 1) 721 return -ERANGE; 722 723 mutex_lock(&tsdata->mutex); 724 725 if (mode != tsdata->factory_mode) { 726 retval = mode ? edt_ft5x06_factory_mode(tsdata) : 727 edt_ft5x06_work_mode(tsdata); 728 } 729 730 mutex_unlock(&tsdata->mutex); 731 732 return retval; 733}; 734 735DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, 736 edt_ft5x06_debugfs_mode_set, "%llu\n"); 737 738static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, 739 char __user *buf, size_t count, 740 loff_t *off) 741{ 742 struct edt_ft5x06_ts_data *tsdata = file->private_data; 743 struct i2c_client *client = tsdata->client; 744 int retries = EDT_RAW_DATA_RETRIES; 745 unsigned int val; 746 int i, error; 747 size_t read = 0; 748 int colbytes; 749 u8 *rdbuf; 750 751 if (*off < 0 || *off >= tsdata->raw_bufsize) 752 return 0; 753 754 mutex_lock(&tsdata->mutex); 755 756 if (!tsdata->factory_mode || !tsdata->raw_buffer) { 757 error = -EIO; 758 goto out; 759 } 760 761 error = regmap_write(tsdata->regmap, 0x08, 0x01); 762 if (error) { 763 dev_err(&client->dev, 764 "failed to write 0x08 register, error %d\n", error); 765 goto out; 766 } 767 768 do { 769 usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100); 770 error = regmap_read(tsdata->regmap, 0x08, &val); 771 if (error) { 772 dev_err(&client->dev, 773 "failed to read 0x08 register, error %d\n", 774 error); 775 goto out; 776 } 777 778 if (val == 1) 779 break; 780 } while (--retries > 0); 781 782 if (retries == 0) { 783 dev_err(&client->dev, 784 "timed out waiting for register to settle\n"); 785 error = -ETIMEDOUT; 786 goto out; 787 } 788 789 rdbuf = tsdata->raw_buffer; 790 colbytes = tsdata->num_y * sizeof(u16); 791 792 for (i = 0; i < tsdata->num_x; i++) { 793 rdbuf[0] = i; /* column index */ 794 error = regmap_bulk_read(tsdata->regmap, 0xf5, rdbuf, colbytes); 795 if (error) 796 goto out; 797 798 rdbuf += colbytes; 799 } 800 801 read = min_t(size_t, count, tsdata->raw_bufsize - *off); 802 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) { 803 error = -EFAULT; 804 goto out; 805 } 806 807 *off += read; 808out: 809 mutex_unlock(&tsdata->mutex); 810 return error ?: read; 811}; 812 813static const struct file_operations debugfs_raw_data_fops = { 814 .open = simple_open, 815 .read = edt_ft5x06_debugfs_raw_data_read, 816}; 817 818static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, 819 const char *debugfs_name) 820{ 821 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL); 822 823 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x); 824 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y); 825 826 debugfs_create_file("mode", S_IRUSR | S_IWUSR, 827 tsdata->debug_dir, tsdata, &debugfs_mode_fops); 828 debugfs_create_file("raw_data", S_IRUSR, 829 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops); 830} 831 832static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 833{ 834 debugfs_remove_recursive(tsdata->debug_dir); 835 kfree(tsdata->raw_buffer); 836} 837 838#else 839 840static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 841{ 842 return -ENOSYS; 843} 844 845static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, 846 const char *debugfs_name) 847{ 848} 849 850static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 851{ 852} 853 854#endif /* CONFIG_DEBUGFS */ 855 856static int edt_ft5x06_ts_identify(struct i2c_client *client, 857 struct edt_ft5x06_ts_data *tsdata) 858{ 859 u8 rdbuf[EDT_NAME_LEN]; 860 char *p; 861 int error; 862 char *model_name = tsdata->name; 863 char *fw_version = tsdata->fw_version; 864 865 /* see what we find if we assume it is a M06 * 866 * if we get less than EDT_NAME_LEN, we don't want 867 * to have garbage in there 868 */ 869 memset(rdbuf, 0, sizeof(rdbuf)); 870 error = regmap_bulk_read(tsdata->regmap, 0xBB, rdbuf, EDT_NAME_LEN - 1); 871 if (error) 872 return error; 873 874 /* Probe content for something consistent. 875 * M06 starts with a response byte, M12 gives the data directly. 876 * M09/Generic does not provide model number information. 877 */ 878 if (!strncasecmp(rdbuf + 1, "EP0", 3)) { 879 tsdata->version = EDT_M06; 880 881 /* remove last '$' end marker */ 882 rdbuf[EDT_NAME_LEN - 1] = '\0'; 883 if (rdbuf[EDT_NAME_LEN - 2] == '$') 884 rdbuf[EDT_NAME_LEN - 2] = '\0'; 885 886 /* look for Model/Version separator */ 887 p = strchr(rdbuf, '*'); 888 if (p) 889 *p++ = '\0'; 890 strscpy(model_name, rdbuf + 1, EDT_NAME_LEN); 891 strscpy(fw_version, p ? p : "", EDT_NAME_LEN); 892 893 regmap_exit(tsdata->regmap); 894 tsdata->regmap = regmap_init_i2c(client, 895 &edt_M06_i2c_regmap_config); 896 if (IS_ERR(tsdata->regmap)) { 897 dev_err(&client->dev, "regmap allocation failed\n"); 898 return PTR_ERR(tsdata->regmap); 899 } 900 } else if (!strncasecmp(rdbuf, "EP0", 3)) { 901 tsdata->version = EDT_M12; 902 903 /* remove last '$' end marker */ 904 rdbuf[EDT_NAME_LEN - 2] = '\0'; 905 if (rdbuf[EDT_NAME_LEN - 3] == '$') 906 rdbuf[EDT_NAME_LEN - 3] = '\0'; 907 908 /* look for Model/Version separator */ 909 p = strchr(rdbuf, '*'); 910 if (p) 911 *p++ = '\0'; 912 strscpy(model_name, rdbuf, EDT_NAME_LEN); 913 strscpy(fw_version, p ? p : "", EDT_NAME_LEN); 914 } else { 915 /* If it is not an EDT M06/M12 touchscreen, then the model 916 * detection is a bit hairy. The different ft5x06 917 * firmwares around don't reliably implement the 918 * identification registers. Well, we'll take a shot. 919 * 920 * The main difference between generic focaltec based 921 * touches and EDT M09 is that we know how to retrieve 922 * the max coordinates for the latter. 923 */ 924 tsdata->version = GENERIC_FT; 925 926 error = regmap_bulk_read(tsdata->regmap, 0xA6, rdbuf, 2); 927 if (error) 928 return error; 929 930 strscpy(fw_version, rdbuf, 2); 931 932 error = regmap_bulk_read(tsdata->regmap, 0xA8, rdbuf, 1); 933 if (error) 934 return error; 935 936 /* This "model identification" is not exact. Unfortunately 937 * not all firmwares for the ft5x06 put useful values in 938 * the identification registers. 939 */ 940 switch (rdbuf[0]) { 941 case 0x11: /* EDT EP0110M09 */ 942 case 0x35: /* EDT EP0350M09 */ 943 case 0x43: /* EDT EP0430M09 */ 944 case 0x50: /* EDT EP0500M09 */ 945 case 0x57: /* EDT EP0570M09 */ 946 case 0x70: /* EDT EP0700M09 */ 947 tsdata->version = EDT_M09; 948 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09", 949 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 950 break; 951 case 0xa1: /* EDT EP1010ML00 */ 952 tsdata->version = EDT_M09; 953 snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00", 954 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 955 break; 956 case 0x5a: /* Solomon Goldentek Display */ 957 snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0"); 958 break; 959 case 0x59: /* Evervision Display with FT5xx6 TS */ 960 tsdata->version = EV_FT; 961 error = regmap_bulk_read(tsdata->regmap, 0x53, rdbuf, 1); 962 if (error) 963 return error; 964 strscpy(fw_version, rdbuf, 1); 965 snprintf(model_name, EDT_NAME_LEN, 966 "EVERVISION-FT5726NEi"); 967 break; 968 default: 969 snprintf(model_name, EDT_NAME_LEN, 970 "generic ft5x06 (%02x)", 971 rdbuf[0]); 972 break; 973 } 974 } 975 976 return 0; 977} 978 979static void edt_ft5x06_ts_get_defaults(struct device *dev, 980 struct edt_ft5x06_ts_data *tsdata) 981{ 982 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 983 struct regmap *regmap = tsdata->regmap; 984 u32 val; 985 int error; 986 987 error = device_property_read_u32(dev, "threshold", &val); 988 if (!error) { 989 regmap_write(regmap, reg_addr->reg_threshold, val); 990 tsdata->threshold = val; 991 } 992 993 error = device_property_read_u32(dev, "gain", &val); 994 if (!error) { 995 regmap_write(regmap, reg_addr->reg_gain, val); 996 tsdata->gain = val; 997 } 998 999 error = device_property_read_u32(dev, "offset", &val); 1000 if (!error) { 1001 if (reg_addr->reg_offset != NO_REGISTER) 1002 regmap_write(regmap, reg_addr->reg_offset, val); 1003 tsdata->offset = val; 1004 } 1005 1006 error = device_property_read_u32(dev, "offset-x", &val); 1007 if (!error) { 1008 if (reg_addr->reg_offset_x != NO_REGISTER) 1009 regmap_write(regmap, reg_addr->reg_offset_x, val); 1010 tsdata->offset_x = val; 1011 } 1012 1013 error = device_property_read_u32(dev, "offset-y", &val); 1014 if (!error) { 1015 if (reg_addr->reg_offset_y != NO_REGISTER) 1016 regmap_write(regmap, reg_addr->reg_offset_y, val); 1017 tsdata->offset_y = val; 1018 } 1019} 1020 1021static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) 1022{ 1023 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 1024 struct regmap *regmap = tsdata->regmap; 1025 unsigned int val; 1026 1027 regmap_read(regmap, reg_addr->reg_threshold, &tsdata->threshold); 1028 regmap_read(regmap, reg_addr->reg_gain, &tsdata->gain); 1029 if (reg_addr->reg_offset != NO_REGISTER) 1030 regmap_read(regmap, reg_addr->reg_offset, &tsdata->offset); 1031 if (reg_addr->reg_offset_x != NO_REGISTER) 1032 regmap_read(regmap, reg_addr->reg_offset_x, &tsdata->offset_x); 1033 if (reg_addr->reg_offset_y != NO_REGISTER) 1034 regmap_read(regmap, reg_addr->reg_offset_y, &tsdata->offset_y); 1035 if (reg_addr->reg_report_rate != NO_REGISTER) 1036 regmap_read(regmap, reg_addr->reg_report_rate, 1037 &tsdata->report_rate); 1038 tsdata->num_x = EDT_DEFAULT_NUM_X; 1039 if (reg_addr->reg_num_x != NO_REGISTER) { 1040 if (!regmap_read(regmap, reg_addr->reg_num_x, &val)) 1041 tsdata->num_x = val; 1042 } 1043 tsdata->num_y = EDT_DEFAULT_NUM_Y; 1044 if (reg_addr->reg_num_y != NO_REGISTER) { 1045 if (!regmap_read(regmap, reg_addr->reg_num_y, &val)) 1046 tsdata->num_y = val; 1047 } 1048} 1049 1050static void edt_ft5x06_ts_set_tdata_parameters(struct edt_ft5x06_ts_data *tsdata) 1051{ 1052 int crclen; 1053 1054 if (tsdata->version == EDT_M06) { 1055 tsdata->tdata_cmd = 0xf9; 1056 tsdata->tdata_offset = 5; 1057 tsdata->point_len = 4; 1058 crclen = 1; 1059 } else { 1060 tsdata->tdata_cmd = 0x0; 1061 tsdata->tdata_offset = 3; 1062 tsdata->point_len = 6; 1063 crclen = 0; 1064 } 1065 1066 tsdata->tdata_len = tsdata->point_len * tsdata->max_support_points + 1067 tsdata->tdata_offset + crclen; 1068} 1069 1070static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) 1071{ 1072 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 1073 1074 switch (tsdata->version) { 1075 case EDT_M06: 1076 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD; 1077 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE; 1078 reg_addr->reg_gain = WORK_REGISTER_GAIN; 1079 reg_addr->reg_offset = WORK_REGISTER_OFFSET; 1080 reg_addr->reg_offset_x = NO_REGISTER; 1081 reg_addr->reg_offset_y = NO_REGISTER; 1082 reg_addr->reg_num_x = WORK_REGISTER_NUM_X; 1083 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y; 1084 break; 1085 1086 case EDT_M09: 1087 case EDT_M12: 1088 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1089 reg_addr->reg_report_rate = tsdata->version == EDT_M12 ? 1090 M12_REGISTER_REPORT_RATE : NO_REGISTER; 1091 reg_addr->reg_gain = M09_REGISTER_GAIN; 1092 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1093 reg_addr->reg_offset_x = NO_REGISTER; 1094 reg_addr->reg_offset_y = NO_REGISTER; 1095 reg_addr->reg_num_x = M09_REGISTER_NUM_X; 1096 reg_addr->reg_num_y = M09_REGISTER_NUM_Y; 1097 break; 1098 1099 case EV_FT: 1100 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD; 1101 reg_addr->reg_report_rate = NO_REGISTER; 1102 reg_addr->reg_gain = EV_REGISTER_GAIN; 1103 reg_addr->reg_offset = NO_REGISTER; 1104 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X; 1105 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y; 1106 reg_addr->reg_num_x = NO_REGISTER; 1107 reg_addr->reg_num_y = NO_REGISTER; 1108 break; 1109 1110 case GENERIC_FT: 1111 /* this is a guesswork */ 1112 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1113 reg_addr->reg_report_rate = NO_REGISTER; 1114 reg_addr->reg_gain = M09_REGISTER_GAIN; 1115 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1116 reg_addr->reg_offset_x = NO_REGISTER; 1117 reg_addr->reg_offset_y = NO_REGISTER; 1118 reg_addr->reg_num_x = NO_REGISTER; 1119 reg_addr->reg_num_y = NO_REGISTER; 1120 break; 1121 } 1122} 1123 1124static void edt_ft5x06_disable_regulators(void *arg) 1125{ 1126 struct edt_ft5x06_ts_data *data = arg; 1127 1128 regulator_disable(data->vcc); 1129 regulator_disable(data->iovcc); 1130} 1131 1132static int edt_ft5x06_ts_probe(struct i2c_client *client) 1133{ 1134 const struct i2c_device_id *id = i2c_client_get_device_id(client); 1135 const struct edt_i2c_chip_data *chip_data; 1136 struct edt_ft5x06_ts_data *tsdata; 1137 unsigned int val; 1138 struct input_dev *input; 1139 unsigned long irq_flags; 1140 int error; 1141 u32 report_rate; 1142 1143 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); 1144 1145 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); 1146 if (!tsdata) { 1147 dev_err(&client->dev, "failed to allocate driver data.\n"); 1148 return -ENOMEM; 1149 } 1150 1151 tsdata->regmap = regmap_init_i2c(client, &edt_ft5x06_i2c_regmap_config); 1152 if (IS_ERR(tsdata->regmap)) { 1153 dev_err(&client->dev, "regmap allocation failed\n"); 1154 return PTR_ERR(tsdata->regmap); 1155 } 1156 1157 chip_data = device_get_match_data(&client->dev); 1158 if (!chip_data) 1159 chip_data = (const struct edt_i2c_chip_data *)id->driver_data; 1160 if (!chip_data || !chip_data->max_support_points) { 1161 dev_err(&client->dev, "invalid or missing chip data\n"); 1162 return -EINVAL; 1163 } 1164 1165 tsdata->max_support_points = chip_data->max_support_points; 1166 1167 tsdata->vcc = devm_regulator_get(&client->dev, "vcc"); 1168 if (IS_ERR(tsdata->vcc)) 1169 return dev_err_probe(&client->dev, PTR_ERR(tsdata->vcc), 1170 "failed to request regulator\n"); 1171 1172 tsdata->iovcc = devm_regulator_get(&client->dev, "iovcc"); 1173 if (IS_ERR(tsdata->iovcc)) { 1174 error = PTR_ERR(tsdata->iovcc); 1175 if (error != -EPROBE_DEFER) 1176 dev_err(&client->dev, 1177 "failed to request iovcc regulator: %d\n", error); 1178 return error; 1179 } 1180 1181 error = regulator_enable(tsdata->iovcc); 1182 if (error < 0) { 1183 dev_err(&client->dev, "failed to enable iovcc: %d\n", error); 1184 return error; 1185 } 1186 1187 /* Delay enabling VCC for > 10us (T_ivd) after IOVCC */ 1188 usleep_range(10, 100); 1189 1190 error = regulator_enable(tsdata->vcc); 1191 if (error < 0) { 1192 dev_err(&client->dev, "failed to enable vcc: %d\n", error); 1193 regulator_disable(tsdata->iovcc); 1194 return error; 1195 } 1196 1197 error = devm_add_action_or_reset(&client->dev, 1198 edt_ft5x06_disable_regulators, 1199 tsdata); 1200 if (error) 1201 return error; 1202 1203 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, 1204 "reset", GPIOD_OUT_HIGH); 1205 if (IS_ERR(tsdata->reset_gpio)) { 1206 error = PTR_ERR(tsdata->reset_gpio); 1207 dev_err(&client->dev, 1208 "Failed to request GPIO reset pin, error %d\n", error); 1209 return error; 1210 } 1211 1212 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev, 1213 "wake", GPIOD_OUT_LOW); 1214 if (IS_ERR(tsdata->wake_gpio)) { 1215 error = PTR_ERR(tsdata->wake_gpio); 1216 dev_err(&client->dev, 1217 "Failed to request GPIO wake pin, error %d\n", error); 1218 return error; 1219 } 1220 1221 /* 1222 * Check which sleep modes we can support. Power-off requieres the 1223 * reset-pin to ensure correct power-down/power-up behaviour. Start with 1224 * the EDT_PMODE_POWEROFF test since this is the deepest possible sleep 1225 * mode. 1226 */ 1227 if (tsdata->reset_gpio) 1228 tsdata->suspend_mode = EDT_PMODE_POWEROFF; 1229 else if (tsdata->wake_gpio) 1230 tsdata->suspend_mode = EDT_PMODE_HIBERNATE; 1231 else 1232 tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED; 1233 1234 if (tsdata->wake_gpio) { 1235 usleep_range(5000, 6000); 1236 gpiod_set_value_cansleep(tsdata->wake_gpio, 1); 1237 usleep_range(5000, 6000); 1238 } 1239 1240 if (tsdata->reset_gpio) { 1241 usleep_range(5000, 6000); 1242 gpiod_set_value_cansleep(tsdata->reset_gpio, 0); 1243 msleep(300); 1244 } 1245 1246 input = devm_input_allocate_device(&client->dev); 1247 if (!input) { 1248 dev_err(&client->dev, "failed to allocate input device.\n"); 1249 return -ENOMEM; 1250 } 1251 1252 mutex_init(&tsdata->mutex); 1253 tsdata->client = client; 1254 tsdata->input = input; 1255 tsdata->factory_mode = false; 1256 i2c_set_clientdata(client, tsdata); 1257 1258 error = edt_ft5x06_ts_identify(client, tsdata); 1259 if (error) { 1260 dev_err(&client->dev, "touchscreen probe failed\n"); 1261 return error; 1262 } 1263 1264 /* 1265 * Dummy read access. EP0700MLP1 returns bogus data on the first 1266 * register read access and ignores writes. 1267 */ 1268 regmap_read(tsdata->regmap, 0x00, &val); 1269 1270 edt_ft5x06_ts_set_tdata_parameters(tsdata); 1271 edt_ft5x06_ts_set_regs(tsdata); 1272 edt_ft5x06_ts_get_defaults(&client->dev, tsdata); 1273 edt_ft5x06_ts_get_parameters(tsdata); 1274 1275 if (tsdata->reg_addr.reg_report_rate != NO_REGISTER && 1276 !device_property_read_u32(&client->dev, 1277 "report-rate-hz", &report_rate)) { 1278 if (tsdata->version == EDT_M06) 1279 tsdata->report_rate = clamp_val(report_rate, 30, 140); 1280 else 1281 tsdata->report_rate = clamp_val(report_rate, 1, 255); 1282 1283 if (report_rate != tsdata->report_rate) 1284 dev_warn(&client->dev, 1285 "report-rate %dHz is unsupported, use %dHz\n", 1286 report_rate, tsdata->report_rate); 1287 1288 if (tsdata->version == EDT_M06) 1289 tsdata->report_rate /= 10; 1290 1291 regmap_write(tsdata->regmap, tsdata->reg_addr.reg_report_rate, 1292 tsdata->report_rate); 1293 } 1294 1295 dev_dbg(&client->dev, 1296 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n", 1297 tsdata->name, tsdata->fw_version, tsdata->num_x, tsdata->num_y); 1298 1299 input->name = tsdata->name; 1300 input->id.bustype = BUS_I2C; 1301 input->dev.parent = &client->dev; 1302 1303 input_set_abs_params(input, ABS_MT_POSITION_X, 1304 0, tsdata->num_x * 64 - 1, 0, 0); 1305 input_set_abs_params(input, ABS_MT_POSITION_Y, 1306 0, tsdata->num_y * 64 - 1, 0, 0); 1307 1308 touchscreen_parse_properties(input, true, &tsdata->prop); 1309 1310 error = input_mt_init_slots(input, tsdata->max_support_points, 1311 INPUT_MT_DIRECT); 1312 if (error) { 1313 dev_err(&client->dev, "Unable to init MT slots.\n"); 1314 return error; 1315 } 1316 1317 irq_flags = irq_get_trigger_type(client->irq); 1318 if (irq_flags == IRQF_TRIGGER_NONE) 1319 irq_flags = IRQF_TRIGGER_FALLING; 1320 irq_flags |= IRQF_ONESHOT; 1321 1322 error = devm_request_threaded_irq(&client->dev, client->irq, 1323 NULL, edt_ft5x06_ts_isr, irq_flags, 1324 client->name, tsdata); 1325 if (error) { 1326 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); 1327 return error; 1328 } 1329 1330 error = input_register_device(input); 1331 if (error) 1332 return error; 1333 1334 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev)); 1335 1336 dev_dbg(&client->dev, 1337 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", 1338 client->irq, 1339 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, 1340 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); 1341 1342 return 0; 1343} 1344 1345static void edt_ft5x06_ts_remove(struct i2c_client *client) 1346{ 1347 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1348 1349 edt_ft5x06_ts_teardown_debugfs(tsdata); 1350 regmap_exit(tsdata->regmap); 1351} 1352 1353static int edt_ft5x06_ts_suspend(struct device *dev) 1354{ 1355 struct i2c_client *client = to_i2c_client(dev); 1356 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1357 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1358 int ret; 1359 1360 if (device_may_wakeup(dev)) 1361 return 0; 1362 1363 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1364 return 0; 1365 1366 /* Enter hibernate mode. */ 1367 ret = regmap_write(tsdata->regmap, PMOD_REGISTER_OPMODE, 1368 PMOD_REGISTER_HIBERNATE); 1369 if (ret) 1370 dev_warn(dev, "Failed to set hibernate mode\n"); 1371 1372 if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE) 1373 return 0; 1374 1375 /* 1376 * Power-off according the datasheet. Cut the power may leaf the irq 1377 * line in an undefined state depending on the host pull resistor 1378 * settings. Disable the irq to avoid adjusting each host till the 1379 * device is back in a full functional state. 1380 */ 1381 disable_irq(tsdata->client->irq); 1382 1383 gpiod_set_value_cansleep(reset_gpio, 1); 1384 usleep_range(1000, 2000); 1385 1386 ret = regulator_disable(tsdata->vcc); 1387 if (ret) 1388 dev_warn(dev, "Failed to disable vcc\n"); 1389 ret = regulator_disable(tsdata->iovcc); 1390 if (ret) 1391 dev_warn(dev, "Failed to disable iovcc\n"); 1392 1393 return 0; 1394} 1395 1396static int edt_ft5x06_ts_resume(struct device *dev) 1397{ 1398 struct i2c_client *client = to_i2c_client(dev); 1399 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1400 int ret = 0; 1401 1402 if (device_may_wakeup(dev)) 1403 return 0; 1404 1405 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1406 return 0; 1407 1408 if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) { 1409 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1410 1411 /* 1412 * We can't check if the regulator is a dummy or a real 1413 * regulator. So we need to specify the 5ms reset time (T_rst) 1414 * here instead of the 100us T_rtp time. We also need to wait 1415 * 300ms in case it was a real supply and the power was cutted 1416 * of. Toggle the reset pin is also a way to exit the hibernate 1417 * mode. 1418 */ 1419 gpiod_set_value_cansleep(reset_gpio, 1); 1420 usleep_range(5000, 6000); 1421 1422 ret = regulator_enable(tsdata->iovcc); 1423 if (ret) { 1424 dev_err(dev, "Failed to enable iovcc\n"); 1425 return ret; 1426 } 1427 1428 /* Delay enabling VCC for > 10us (T_ivd) after IOVCC */ 1429 usleep_range(10, 100); 1430 1431 ret = regulator_enable(tsdata->vcc); 1432 if (ret) { 1433 dev_err(dev, "Failed to enable vcc\n"); 1434 regulator_disable(tsdata->iovcc); 1435 return ret; 1436 } 1437 1438 usleep_range(1000, 2000); 1439 gpiod_set_value_cansleep(reset_gpio, 0); 1440 msleep(300); 1441 1442 edt_ft5x06_restore_reg_parameters(tsdata); 1443 enable_irq(tsdata->client->irq); 1444 1445 if (tsdata->factory_mode) 1446 ret = edt_ft5x06_factory_mode(tsdata); 1447 } else { 1448 struct gpio_desc *wake_gpio = tsdata->wake_gpio; 1449 1450 gpiod_set_value_cansleep(wake_gpio, 0); 1451 usleep_range(5000, 6000); 1452 gpiod_set_value_cansleep(wake_gpio, 1); 1453 } 1454 1455 return ret; 1456} 1457 1458static DEFINE_SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, 1459 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); 1460 1461static const struct edt_i2c_chip_data edt_ft5x06_data = { 1462 .max_support_points = 5, 1463}; 1464 1465static const struct edt_i2c_chip_data edt_ft5506_data = { 1466 .max_support_points = 10, 1467}; 1468 1469static const struct edt_i2c_chip_data edt_ft6236_data = { 1470 .max_support_points = 2, 1471}; 1472 1473static const struct i2c_device_id edt_ft5x06_ts_id[] = { 1474 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, 1475 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, 1476 { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data }, 1477 /* Note no edt- prefix for compatibility with the ft6236.c driver */ 1478 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data }, 1479 { /* sentinel */ } 1480}; 1481MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); 1482 1483static const struct of_device_id edt_ft5x06_of_match[] = { 1484 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, 1485 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, 1486 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, 1487 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, 1488 { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data }, 1489 /* Note focaltech vendor prefix for compatibility with ft6236.c */ 1490 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data }, 1491 { /* sentinel */ } 1492}; 1493MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); 1494 1495static struct i2c_driver edt_ft5x06_ts_driver = { 1496 .driver = { 1497 .name = "edt_ft5x06", 1498 .dev_groups = edt_ft5x06_groups, 1499 .of_match_table = edt_ft5x06_of_match, 1500 .pm = pm_sleep_ptr(&edt_ft5x06_ts_pm_ops), 1501 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1502 }, 1503 .id_table = edt_ft5x06_ts_id, 1504 .probe = edt_ft5x06_ts_probe, 1505 .remove = edt_ft5x06_ts_remove, 1506}; 1507 1508module_i2c_driver(edt_ft5x06_ts_driver); 1509 1510MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>"); 1511MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); 1512MODULE_LICENSE("GPL v2"); 1513