/* * Copyright (C) 2012 Simon Budig, * Daniel Wagener (M09 firmware support) * Lothar Waßmann (DT support) * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * This is a driver for the EDT "Polytouch" family of touch controllers * based on the FocalTech FT5x06 line of chips. * * Development of this driver has been sponsored by Glyn: * http://www.glyn.com/Products/Displays */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define WORK_REGISTER_THRESHOLD 0x00 #define WORK_REGISTER_REPORT_RATE 0x08 #define WORK_REGISTER_GAIN 0x30 #define WORK_REGISTER_OFFSET 0x31 #define WORK_REGISTER_NUM_X 0x33 #define WORK_REGISTER_NUM_Y 0x34 #define M09_REGISTER_THRESHOLD 0x80 #define M09_REGISTER_GAIN 0x92 #define M09_REGISTER_OFFSET 0x93 #define M09_REGISTER_NUM_X 0x94 #define M09_REGISTER_NUM_Y 0x95 #define NO_REGISTER 0xff #define WORK_REGISTER_OPMODE 0x3c #define FACTORY_REGISTER_OPMODE 0x01 #define TOUCH_EVENT_DOWN 0x00 #define TOUCH_EVENT_UP 0x01 #define TOUCH_EVENT_ON 0x02 #define TOUCH_EVENT_RESERVED 0x03 #define EDT_NAME_LEN 23 #define EDT_SWITCH_MODE_RETRIES 10 #define EDT_SWITCH_MODE_DELAY 5 /* msec */ #define EDT_RAW_DATA_RETRIES 100 #define EDT_RAW_DATA_DELAY 1000 /* usec */ enum edt_ver { EDT_M06, EDT_M09, GENERIC_FT, }; struct edt_reg_addr { int reg_threshold; int reg_report_rate; int reg_gain; int reg_offset; int reg_num_x; int reg_num_y; }; struct edt_ft5x06_ts_data { struct i2c_client *client; struct input_dev *input; struct touchscreen_properties prop; u16 num_x; u16 num_y; struct gpio_desc *reset_gpio; struct gpio_desc *wake_gpio; #if defined(CONFIG_DEBUG_FS) struct dentry *debug_dir; u8 *raw_buffer; size_t raw_bufsize; #endif struct mutex mutex; bool factory_mode; int threshold; int gain; int offset; int report_rate; int max_support_points; char name[EDT_NAME_LEN]; struct edt_reg_addr reg_addr; enum edt_ver version; }; struct edt_i2c_chip_data { int max_support_points; }; static int edt_ft5x06_ts_readwrite(struct i2c_client *client, u16 wr_len, u8 *wr_buf, u16 rd_len, u8 *rd_buf) { struct i2c_msg wrmsg[2]; int i = 0; int ret; if (wr_len) { wrmsg[i].addr = client->addr; wrmsg[i].flags = 0; wrmsg[i].len = wr_len; wrmsg[i].buf = wr_buf; i++; } if (rd_len) { wrmsg[i].addr = client->addr; wrmsg[i].flags = I2C_M_RD; wrmsg[i].len = rd_len; wrmsg[i].buf = rd_buf; i++; } ret = i2c_transfer(client->adapter, wrmsg, i); if (ret < 0) return ret; if (ret != i) return -EIO; return 0; } static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, u8 *buf, int buflen) { int i; u8 crc = 0; for (i = 0; i < buflen - 1; i++) crc ^= buf[i]; if (crc != buf[buflen-1]) { dev_err_ratelimited(&tsdata->client->dev, "crc error: 0x%02x expected, got 0x%02x\n", crc, buf[buflen-1]); return false; } return true; } static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) { struct edt_ft5x06_ts_data *tsdata = dev_id; struct device *dev = &tsdata->client->dev; u8 cmd; u8 rdbuf[63]; int i, type, x, y, id; int offset, tplen, datalen, crclen; int error; switch (tsdata->version) { case EDT_M06: cmd = 0xf9; /* tell the controller to send touch data */ offset = 5; /* where the actual touch data starts */ tplen = 4; /* data comes in so called frames */ crclen = 1; /* length of the crc data */ break; case EDT_M09: case GENERIC_FT: cmd = 0x0; offset = 3; tplen = 6; crclen = 0; break; default: goto out; } memset(rdbuf, 0, sizeof(rdbuf)); datalen = tplen * tsdata->max_support_points + offset + crclen; error = edt_ft5x06_ts_readwrite(tsdata->client, sizeof(cmd), &cmd, datalen, rdbuf); if (error) { dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", error); goto out; } /* M09 does not send header or CRC */ if (tsdata->version == EDT_M06) { if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != datalen) { dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n", rdbuf[0], rdbuf[1], rdbuf[2]); goto out; } if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen)) goto out; } for (i = 0; i < tsdata->max_support_points; i++) { u8 *buf = &rdbuf[i * tplen + offset]; bool down; type = buf[0] >> 6; /* ignore Reserved events */ if (type == TOUCH_EVENT_RESERVED) continue; /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */ if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN) continue; x = ((buf[0] << 8) | buf[1]) & 0x0fff; y = ((buf[2] << 8) | buf[3]) & 0x0fff; id = (buf[2] >> 4) & 0x0f; down = type != TOUCH_EVENT_UP; input_mt_slot(tsdata->input, id); input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down); if (!down) continue; touchscreen_report_pos(tsdata->input, &tsdata->prop, x, y, true); } input_mt_report_pointer_emulation(tsdata->input, true); input_sync(tsdata->input); out: return IRQ_HANDLED; } static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, u8 addr, u8 value) { u8 wrbuf[4]; switch (tsdata->version) { case EDT_M06: wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; wrbuf[2] = value; wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL); case EDT_M09: case GENERIC_FT: wrbuf[0] = addr; wrbuf[1] = value; return edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 0, NULL); default: return -EINVAL; } } static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, u8 addr) { u8 wrbuf[2], rdbuf[2]; int error; switch (tsdata->version) { case EDT_M06: wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf); if (error) return error; if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { dev_err(&tsdata->client->dev, "crc error: 0x%02x expected, got 0x%02x\n", wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]); return -EIO; } break; case EDT_M09: case GENERIC_FT: wrbuf[0] = addr; error = edt_ft5x06_ts_readwrite(tsdata->client, 1, wrbuf, 1, rdbuf); if (error) return error; break; default: return -EINVAL; } return rdbuf[0]; } struct edt_ft5x06_attribute { struct device_attribute dattr; size_t field_offset; u8 limit_low; u8 limit_high; u8 addr_m06; u8 addr_m09; }; #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, \ _limit_low, _limit_high) \ struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ .dattr = __ATTR(_field, _mode, \ edt_ft5x06_setting_show, \ edt_ft5x06_setting_store), \ .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \ .addr_m06 = _addr_m06, \ .addr_m09 = _addr_m09, \ .limit_low = _limit_low, \ .limit_high = _limit_high, \ } static ssize_t edt_ft5x06_setting_show(struct device *dev, struct device_attribute *dattr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); struct edt_ft5x06_attribute *attr = container_of(dattr, struct edt_ft5x06_attribute, dattr); u8 *field = (u8 *)tsdata + attr->field_offset; int val; size_t count = 0; int error = 0; u8 addr; mutex_lock(&tsdata->mutex); if (tsdata->factory_mode) { error = -EIO; goto out; } switch (tsdata->version) { case EDT_M06: addr = attr->addr_m06; break; case EDT_M09: case GENERIC_FT: addr = attr->addr_m09; break; default: error = -ENODEV; goto out; } if (addr != NO_REGISTER) { val = edt_ft5x06_register_read(tsdata, addr); if (val < 0) { error = val; dev_err(&tsdata->client->dev, "Failed to fetch attribute %s, error %d\n", dattr->attr.name, error); goto out; } } else { val = *field; } if (val != *field) { dev_warn(&tsdata->client->dev, "%s: read (%d) and stored value (%d) differ\n", dattr->attr.name, val, *field); *field = val; } count = scnprintf(buf, PAGE_SIZE, "%d\n", val); out: mutex_unlock(&tsdata->mutex); return error ?: count; } static ssize_t edt_ft5x06_setting_store(struct device *dev, struct device_attribute *dattr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); struct edt_ft5x06_attribute *attr = container_of(dattr, struct edt_ft5x06_attribute, dattr); u8 *field = (u8 *)tsdata + attr->field_offset; unsigned int val; int error; u8 addr; mutex_lock(&tsdata->mutex); if (tsdata->factory_mode) { error = -EIO; goto out; } error = kstrtouint(buf, 0, &val); if (error) goto out; if (val < attr->limit_low || val > attr->limit_high) { error = -ERANGE; goto out; } switch (tsdata->version) { case EDT_M06: addr = attr->addr_m06; break; case EDT_M09: case GENERIC_FT: addr = attr->addr_m09; break; default: error = -ENODEV; goto out; } if (addr != NO_REGISTER) { error = edt_ft5x06_register_write(tsdata, addr, val); if (error) { dev_err(&tsdata->client->dev, "Failed to update attribute %s, error: %d\n", dattr->attr.name, error); goto out; } } *field = val; out: mutex_unlock(&tsdata->mutex); return error ?: count; } static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, M09_REGISTER_GAIN, 0, 31); static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, M09_REGISTER_OFFSET, 0, 31); static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, M09_REGISTER_THRESHOLD, 0, 80); static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, NO_REGISTER, 3, 14); static struct attribute *edt_ft5x06_attrs[] = { &edt_ft5x06_attr_gain.dattr.attr, &edt_ft5x06_attr_offset.dattr.attr, &edt_ft5x06_attr_threshold.dattr.attr, &edt_ft5x06_attr_report_rate.dattr.attr, NULL }; static const struct attribute_group edt_ft5x06_attr_group = { .attrs = edt_ft5x06_attrs, }; #ifdef CONFIG_DEBUG_FS static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) { struct i2c_client *client = tsdata->client; int retries = EDT_SWITCH_MODE_RETRIES; int ret; int error; disable_irq(client->irq); if (!tsdata->raw_buffer) { tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * sizeof(u16); tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); if (!tsdata->raw_buffer) { error = -ENOMEM; goto err_out; } } /* mode register is 0x3c when in the work mode */ if (tsdata->version != EDT_M06) goto m09_out; error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03); if (error) { dev_err(&client->dev, "failed to switch to factory mode, error %d\n", error); goto err_out; } tsdata->factory_mode = true; do { mdelay(EDT_SWITCH_MODE_DELAY); /* mode register is 0x01 when in factory mode */ ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE); if (ret == 0x03) break; } while (--retries > 0); if (retries == 0) { dev_err(&client->dev, "not in factory mode after %dms.\n", EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); error = -EIO; goto err_out; } return 0; err_out: kfree(tsdata->raw_buffer); tsdata->raw_buffer = NULL; tsdata->factory_mode = false; enable_irq(client->irq); return error; m09_out: dev_err(&client->dev, "No factory mode support for M09/GENERIC_FT\n"); return -EINVAL; } static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) { struct i2c_client *client = tsdata->client; int retries = EDT_SWITCH_MODE_RETRIES; struct edt_reg_addr *reg_addr = &tsdata->reg_addr; int ret; int error; /* mode register is 0x01 when in the factory mode */ error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1); if (error) { dev_err(&client->dev, "failed to switch to work mode, error: %d\n", error); return error; } tsdata->factory_mode = false; do { mdelay(EDT_SWITCH_MODE_DELAY); /* mode register is 0x01 when in factory mode */ ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE); if (ret == 0x01) break; } while (--retries > 0); if (retries == 0) { dev_err(&client->dev, "not in work mode after %dms.\n", EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); tsdata->factory_mode = true; return -EIO; } kfree(tsdata->raw_buffer); tsdata->raw_buffer = NULL; /* restore parameters */ edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, tsdata->threshold); edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, tsdata->gain); edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, tsdata->offset); if (reg_addr->reg_report_rate != NO_REGISTER) edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate, tsdata->report_rate); enable_irq(client->irq); return 0; } static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) { struct edt_ft5x06_ts_data *tsdata = data; *mode = tsdata->factory_mode; return 0; }; static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) { struct edt_ft5x06_ts_data *tsdata = data; int retval = 0; if (mode > 1) return -ERANGE; mutex_lock(&tsdata->mutex); if (mode != tsdata->factory_mode) { retval = mode ? edt_ft5x06_factory_mode(tsdata) : edt_ft5x06_work_mode(tsdata); } mutex_unlock(&tsdata->mutex); return retval; }; DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, edt_ft5x06_debugfs_mode_set, "%llu\n"); static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, char __user *buf, size_t count, loff_t *off) { struct edt_ft5x06_ts_data *tsdata = file->private_data; struct i2c_client *client = tsdata->client; int retries = EDT_RAW_DATA_RETRIES; int val, i, error; size_t read = 0; int colbytes; char wrbuf[3]; u8 *rdbuf; if (*off < 0 || *off >= tsdata->raw_bufsize) return 0; mutex_lock(&tsdata->mutex); if (!tsdata->factory_mode || !tsdata->raw_buffer) { error = -EIO; goto out; } error = edt_ft5x06_register_write(tsdata, 0x08, 0x01); if (error) { dev_dbg(&client->dev, "failed to write 0x08 register, error %d\n", error); goto out; } do { usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100); val = edt_ft5x06_register_read(tsdata, 0x08); if (val < 1) break; } while (--retries > 0); if (val < 0) { error = val; dev_dbg(&client->dev, "failed to read 0x08 register, error %d\n", error); goto out; } if (retries == 0) { dev_dbg(&client->dev, "timed out waiting for register to settle\n"); error = -ETIMEDOUT; goto out; } rdbuf = tsdata->raw_buffer; colbytes = tsdata->num_y * sizeof(u16); wrbuf[0] = 0xf5; wrbuf[1] = 0x0e; for (i = 0; i < tsdata->num_x; i++) { wrbuf[2] = i; /* column index */ error = edt_ft5x06_ts_readwrite(tsdata->client, sizeof(wrbuf), wrbuf, colbytes, rdbuf); if (error) goto out; rdbuf += colbytes; } read = min_t(size_t, count, tsdata->raw_bufsize - *off); if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) { error = -EFAULT; goto out; } *off += read; out: mutex_unlock(&tsdata->mutex); return error ?: read; }; static const struct file_operations debugfs_raw_data_fops = { .open = simple_open, .read = edt_ft5x06_debugfs_raw_data_read, }; static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, const char *debugfs_name) { tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL); if (!tsdata->debug_dir) return; debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x); debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y); debugfs_create_file("mode", S_IRUSR | S_IWUSR, tsdata->debug_dir, tsdata, &debugfs_mode_fops); debugfs_create_file("raw_data", S_IRUSR, tsdata->debug_dir, tsdata, &debugfs_raw_data_fops); } static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) { debugfs_remove_recursive(tsdata->debug_dir); kfree(tsdata->raw_buffer); } #else static inline void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, const char *debugfs_name) { } static inline void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) { } #endif /* CONFIG_DEBUGFS */ static int edt_ft5x06_ts_identify(struct i2c_client *client, struct edt_ft5x06_ts_data *tsdata, char *fw_version) { u8 rdbuf[EDT_NAME_LEN]; char *p; int error; char *model_name = tsdata->name; /* see what we find if we assume it is a M06 * * if we get less than EDT_NAME_LEN, we don't want * to have garbage in there */ memset(rdbuf, 0, sizeof(rdbuf)); error = edt_ft5x06_ts_readwrite(client, 1, "\xbb", EDT_NAME_LEN - 1, rdbuf); if (error) return error; /* if we find something consistent, stay with that assumption * at least M09 won't send 3 bytes here */ if (!(strncasecmp(rdbuf + 1, "EP0", 3))) { tsdata->version = EDT_M06; /* remove last '$' end marker */ rdbuf[EDT_NAME_LEN - 1] = '\0'; if (rdbuf[EDT_NAME_LEN - 2] == '$') rdbuf[EDT_NAME_LEN - 2] = '\0'; /* look for Model/Version separator */ p = strchr(rdbuf, '*'); if (p) *p++ = '\0'; strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); } else { /* If it is not an EDT M06 touchscreen, then the model * detection is a bit hairy. The different ft5x06 * firmares around don't reliably implement the * identification registers. Well, we'll take a shot. * * The main difference between generic focaltec based * touches and EDT M09 is that we know how to retrieve * the max coordinates for the latter. */ tsdata->version = GENERIC_FT; error = edt_ft5x06_ts_readwrite(client, 1, "\xA6", 2, rdbuf); if (error) return error; strlcpy(fw_version, rdbuf, 2); error = edt_ft5x06_ts_readwrite(client, 1, "\xA8", 1, rdbuf); if (error) return error; /* This "model identification" is not exact. Unfortunately * not all firmwares for the ft5x06 put useful values in * the identification registers. */ switch (rdbuf[0]) { case 0x35: /* EDT EP0350M09 */ case 0x43: /* EDT EP0430M09 */ case 0x50: /* EDT EP0500M09 */ case 0x57: /* EDT EP0570M09 */ case 0x70: /* EDT EP0700M09 */ tsdata->version = EDT_M09; snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09", rdbuf[0] >> 4, rdbuf[0] & 0x0F); break; case 0xa1: /* EDT EP1010ML00 */ tsdata->version = EDT_M09; snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00", rdbuf[0] >> 4, rdbuf[0] & 0x0F); break; case 0x5a: /* Solomon Goldentek Display */ snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0"); break; default: snprintf(model_name, EDT_NAME_LEN, "generic ft5x06 (%02x)", rdbuf[0]); break; } } return 0; } static void edt_ft5x06_ts_get_defaults(struct device *dev, struct edt_ft5x06_ts_data *tsdata) { struct edt_reg_addr *reg_addr = &tsdata->reg_addr; u32 val; int error; error = device_property_read_u32(dev, "threshold", &val); if (!error) { edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val); tsdata->threshold = val; } error = device_property_read_u32(dev, "gain", &val); if (!error) { edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val); tsdata->gain = val; } error = device_property_read_u32(dev, "offset", &val); if (!error) { edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, val); tsdata->offset = val; } } static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) { struct edt_reg_addr *reg_addr = &tsdata->reg_addr; tsdata->threshold = edt_ft5x06_register_read(tsdata, reg_addr->reg_threshold); tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain); tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset); if (reg_addr->reg_report_rate != NO_REGISTER) tsdata->report_rate = edt_ft5x06_register_read(tsdata, reg_addr->reg_report_rate); if (tsdata->version == EDT_M06 || tsdata->version == EDT_M09) { tsdata->num_x = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x); tsdata->num_y = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_y); } else { tsdata->num_x = -1; tsdata->num_y = -1; } } static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) { struct edt_reg_addr *reg_addr = &tsdata->reg_addr; switch (tsdata->version) { case EDT_M06: reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD; reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE; reg_addr->reg_gain = WORK_REGISTER_GAIN; reg_addr->reg_offset = WORK_REGISTER_OFFSET; reg_addr->reg_num_x = WORK_REGISTER_NUM_X; reg_addr->reg_num_y = WORK_REGISTER_NUM_Y; break; case EDT_M09: reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; reg_addr->reg_report_rate = NO_REGISTER; reg_addr->reg_gain = M09_REGISTER_GAIN; reg_addr->reg_offset = M09_REGISTER_OFFSET; reg_addr->reg_num_x = M09_REGISTER_NUM_X; reg_addr->reg_num_y = M09_REGISTER_NUM_Y; break; case GENERIC_FT: /* this is a guesswork */ reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; reg_addr->reg_gain = M09_REGISTER_GAIN; reg_addr->reg_offset = M09_REGISTER_OFFSET; break; } } static int edt_ft5x06_ts_probe(struct i2c_client *client, const struct i2c_device_id *id) { const struct edt_i2c_chip_data *chip_data; struct edt_ft5x06_ts_data *tsdata; struct input_dev *input; unsigned long irq_flags; int error; char fw_version[EDT_NAME_LEN]; dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); if (!tsdata) { dev_err(&client->dev, "failed to allocate driver data.\n"); return -ENOMEM; } chip_data = of_device_get_match_data(&client->dev); if (!chip_data) chip_data = (const struct edt_i2c_chip_data *)id->driver_data; if (!chip_data || !chip_data->max_support_points) { dev_err(&client->dev, "invalid or missing chip data\n"); return -EINVAL; } tsdata->max_support_points = chip_data->max_support_points; tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(tsdata->reset_gpio)) { error = PTR_ERR(tsdata->reset_gpio); dev_err(&client->dev, "Failed to request GPIO reset pin, error %d\n", error); return error; } tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev, "wake", GPIOD_OUT_LOW); if (IS_ERR(tsdata->wake_gpio)) { error = PTR_ERR(tsdata->wake_gpio); dev_err(&client->dev, "Failed to request GPIO wake pin, error %d\n", error); return error; } if (tsdata->wake_gpio) { usleep_range(5000, 6000); gpiod_set_value_cansleep(tsdata->wake_gpio, 1); } if (tsdata->reset_gpio) { usleep_range(5000, 6000); gpiod_set_value_cansleep(tsdata->reset_gpio, 0); msleep(300); } input = devm_input_allocate_device(&client->dev); if (!input) { dev_err(&client->dev, "failed to allocate input device.\n"); return -ENOMEM; } mutex_init(&tsdata->mutex); tsdata->client = client; tsdata->input = input; tsdata->factory_mode = false; error = edt_ft5x06_ts_identify(client, tsdata, fw_version); if (error) { dev_err(&client->dev, "touchscreen probe failed\n"); return error; } edt_ft5x06_ts_set_regs(tsdata); edt_ft5x06_ts_get_defaults(&client->dev, tsdata); edt_ft5x06_ts_get_parameters(tsdata); dev_dbg(&client->dev, "Model \"%s\", Rev. \"%s\", %dx%d sensors\n", tsdata->name, fw_version, tsdata->num_x, tsdata->num_y); input->name = tsdata->name; input->id.bustype = BUS_I2C; input->dev.parent = &client->dev; if (tsdata->version == EDT_M06 || tsdata->version == EDT_M09) { input_set_abs_params(input, ABS_MT_POSITION_X, 0, tsdata->num_x * 64 - 1, 0, 0); input_set_abs_params(input, ABS_MT_POSITION_Y, 0, tsdata->num_y * 64 - 1, 0, 0); } else { /* Unknown maximum values. Specify via devicetree */ input_set_abs_params(input, ABS_MT_POSITION_X, 0, 65535, 0, 0); input_set_abs_params(input, ABS_MT_POSITION_Y, 0, 65535, 0, 0); } touchscreen_parse_properties(input, true, &tsdata->prop); error = input_mt_init_slots(input, tsdata->max_support_points, INPUT_MT_DIRECT); if (error) { dev_err(&client->dev, "Unable to init MT slots.\n"); return error; } i2c_set_clientdata(client, tsdata); irq_flags = irq_get_trigger_type(client->irq); if (irq_flags == IRQF_TRIGGER_NONE) irq_flags = IRQF_TRIGGER_FALLING; irq_flags |= IRQF_ONESHOT; error = devm_request_threaded_irq(&client->dev, client->irq, NULL, edt_ft5x06_ts_isr, irq_flags, client->name, tsdata); if (error) { dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); return error; } error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group); if (error) return error; error = input_register_device(input); if (error) return error; edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev)); device_init_wakeup(&client->dev, 1); dev_dbg(&client->dev, "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", client->irq, tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); return 0; } static int edt_ft5x06_ts_remove(struct i2c_client *client) { struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); edt_ft5x06_ts_teardown_debugfs(tsdata); return 0; } static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); if (device_may_wakeup(dev)) enable_irq_wake(client->irq); return 0; } static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); if (device_may_wakeup(dev)) disable_irq_wake(client->irq); return 0; } static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); static const struct edt_i2c_chip_data edt_ft5x06_data = { .max_support_points = 5, }; static const struct edt_i2c_chip_data edt_ft5506_data = { .max_support_points = 10, }; static const struct edt_i2c_chip_data edt_ft6236_data = { .max_support_points = 2, }; static const struct i2c_device_id edt_ft5x06_ts_id[] = { { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, /* Note no edt- prefix for compatibility with the ft6236.c driver */ { .name = "ft6236", .driver_data = (long)&edt_ft6236_data }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); #ifdef CONFIG_OF static const struct of_device_id edt_ft5x06_of_match[] = { { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, /* Note focaltech vendor prefix for compatibility with ft6236.c */ { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); #endif static struct i2c_driver edt_ft5x06_ts_driver = { .driver = { .name = "edt_ft5x06", .of_match_table = of_match_ptr(edt_ft5x06_of_match), .pm = &edt_ft5x06_ts_pm_ops, }, .id_table = edt_ft5x06_ts_id, .probe = edt_ft5x06_ts_probe, .remove = edt_ft5x06_ts_remove, }; module_i2c_driver(edt_ft5x06_ts_driver); MODULE_AUTHOR("Simon Budig "); MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); MODULE_LICENSE("GPL");