| /* |
| * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de> |
| * |
| * 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 <linux/module.h> |
| #include <linux/ratelimit.h> |
| #include <linux/interrupt.h> |
| #include <linux/input.h> |
| #include <linux/i2c.h> |
| #include <linux/uaccess.h> |
| #include <linux/delay.h> |
| #include <linux/debugfs.h> |
| #include <linux/slab.h> |
| #include <linux/gpio.h> |
| #include <linux/input/mt.h> |
| #include <linux/input/edt-ft5x06.h> |
| |
| #define MAX_SUPPORT_POINTS 5 |
| |
| #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 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 1 /* msec */ |
| |
| struct edt_ft5x06_ts_data { |
| struct i2c_client *client; |
| struct input_dev *input; |
| u16 num_x; |
| u16 num_y; |
| |
| #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; |
| |
| char name[EDT_NAME_LEN]; |
| }; |
| |
| 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 = 0xf9; |
| u8 rdbuf[26]; |
| int i, type, x, y, id; |
| int error; |
| |
| memset(rdbuf, 0, sizeof(rdbuf)); |
| |
| error = edt_ft5x06_ts_readwrite(tsdata->client, |
| sizeof(cmd), &cmd, |
| sizeof(rdbuf), rdbuf); |
| if (error) { |
| dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", |
| error); |
| goto out; |
| } |
| |
| if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) { |
| 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, 26)) |
| goto out; |
| |
| for (i = 0; i < MAX_SUPPORT_POINTS; i++) { |
| u8 *buf = &rdbuf[i * 4 + 5]; |
| bool down; |
| |
| type = buf[0] >> 6; |
| /* ignore Reserved events */ |
| if (type == TOUCH_EVENT_RESERVED) |
| 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; |
| |
| input_report_abs(tsdata->input, ABS_MT_POSITION_X, x); |
| input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y); |
| } |
| |
| 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]; |
| |
| 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); |
| } |
| |
| static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, |
| u8 addr) |
| { |
| u8 wrbuf[2], rdbuf[2]; |
| int error; |
| |
| 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; |
| } |
| |
| return rdbuf[0]; |
| } |
| |
| struct edt_ft5x06_attribute { |
| struct device_attribute dattr; |
| size_t field_offset; |
| u8 limit_low; |
| u8 limit_high; |
| u8 addr; |
| }; |
| |
| #define EDT_ATTR(_field, _mode, _addr, _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), \ |
| .limit_low = _limit_low, \ |
| .limit_high = _limit_high, \ |
| .addr = _addr, \ |
| } |
| |
| 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 *)((char *)tsdata + attr->field_offset); |
| int val; |
| size_t count = 0; |
| int error = 0; |
| |
| mutex_lock(&tsdata->mutex); |
| |
| if (tsdata->factory_mode) { |
| error = -EIO; |
| goto out; |
| } |
| |
| val = edt_ft5x06_register_read(tsdata, attr->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; |
| } |
| |
| 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 *)((char *)tsdata + attr->field_offset); |
| unsigned int val; |
| int error; |
| |
| 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; |
| } |
| |
| error = edt_ft5x06_register_write(tsdata, attr->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, 0, 31); |
| static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31); |
| static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, |
| WORK_REGISTER_THRESHOLD, 20, 80); |
| static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, |
| WORK_REGISTER_REPORT_RATE, 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 */ |
| 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; |
| } |
| |
| static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) |
| { |
| struct i2c_client *client = tsdata->client; |
| int retries = EDT_SWITCH_MODE_RETRIES; |
| 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, WORK_REGISTER_THRESHOLD, |
| tsdata->threshold); |
| edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN, |
| tsdata->gain); |
| edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET, |
| tsdata->offset); |
| edt_ft5x06_register_write(tsdata, WORK_REGISTER_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 { |
| msleep(EDT_RAW_DATA_DELAY); |
| 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) |
| { |
| if (tsdata->debug_dir) |
| 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_reset(struct i2c_client *client, |
| int reset_pin) |
| { |
| int error; |
| |
| if (gpio_is_valid(reset_pin)) { |
| /* this pulls reset down, enabling the low active reset */ |
| error = devm_gpio_request_one(&client->dev, reset_pin, |
| GPIOF_OUT_INIT_LOW, |
| "edt-ft5x06 reset"); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to request GPIO %d as reset pin, error %d\n", |
| reset_pin, error); |
| return error; |
| } |
| |
| mdelay(50); |
| gpio_set_value(reset_pin, 1); |
| mdelay(100); |
| } |
| |
| return 0; |
| } |
| |
| static int edt_ft5x06_ts_identify(struct i2c_client *client, |
| char *model_name, |
| char *fw_version) |
| { |
| u8 rdbuf[EDT_NAME_LEN]; |
| char *p; |
| int error; |
| |
| error = edt_ft5x06_ts_readwrite(client, 1, "\xbb", |
| EDT_NAME_LEN - 1, rdbuf); |
| if (error) |
| return error; |
| |
| /* 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); |
| |
| return 0; |
| } |
| |
| #define EDT_ATTR_CHECKSET(name, reg) \ |
| if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \ |
| pdata->name <= edt_ft5x06_attr_##name.limit_high) \ |
| edt_ft5x06_register_write(tsdata, reg, pdata->name) |
| |
| static void |
| edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata, |
| const struct edt_ft5x06_platform_data *pdata) |
| { |
| if (!pdata->use_parameters) |
| return; |
| |
| /* pick up defaults from the platform data */ |
| EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD); |
| EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN); |
| EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET); |
| EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE); |
| } |
| |
| static void |
| edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) |
| { |
| tsdata->threshold = edt_ft5x06_register_read(tsdata, |
| WORK_REGISTER_THRESHOLD); |
| tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN); |
| tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET); |
| tsdata->report_rate = edt_ft5x06_register_read(tsdata, |
| WORK_REGISTER_REPORT_RATE); |
| tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X); |
| tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y); |
| } |
| |
| static int edt_ft5x06_ts_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| const struct edt_ft5x06_platform_data *pdata = |
| dev_get_platdata(&client->dev); |
| struct edt_ft5x06_ts_data *tsdata; |
| struct input_dev *input; |
| int error; |
| char fw_version[EDT_NAME_LEN]; |
| |
| dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); |
| |
| if (!pdata) { |
| dev_err(&client->dev, "no platform data?\n"); |
| return -EINVAL; |
| } |
| |
| error = edt_ft5x06_ts_reset(client, pdata->reset_pin); |
| if (error) |
| return error; |
| |
| if (gpio_is_valid(pdata->irq_pin)) { |
| error = devm_gpio_request_one(&client->dev, pdata->irq_pin, |
| GPIOF_IN, "edt-ft5x06 irq"); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to request GPIO %d, error %d\n", |
| pdata->irq_pin, error); |
| return error; |
| } |
| } |
| |
| tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); |
| if (!tsdata) { |
| dev_err(&client->dev, "failed to allocate driver data.\n"); |
| return -ENOMEM; |
| } |
| |
| 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->name, fw_version); |
| if (error) { |
| dev_err(&client->dev, "touchscreen probe failed\n"); |
| return error; |
| } |
| |
| edt_ft5x06_ts_get_defaults(tsdata, pdata); |
| 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; |
| |
| __set_bit(EV_SYN, input->evbit); |
| __set_bit(EV_KEY, input->evbit); |
| __set_bit(EV_ABS, input->evbit); |
| __set_bit(BTN_TOUCH, input->keybit); |
| input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0); |
| input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0); |
| 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); |
| error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0); |
| if (error) { |
| dev_err(&client->dev, "Unable to init MT slots.\n"); |
| return error; |
| } |
| |
| input_set_drvdata(input, tsdata); |
| i2c_set_clientdata(client, tsdata); |
| |
| error = devm_request_threaded_irq(&client->dev, client->irq, |
| NULL, edt_ft5x06_ts_isr, |
| IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| client->name, tsdata); |
| if (error) { |
| dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); |
| return error; |
| } |
| |
| error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group); |
| if (error) |
| return error; |
| |
| error = input_register_device(input); |
| if (error) { |
| sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group); |
| 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 pin %d, Reset pin %d.\n", |
| pdata->irq_pin, pdata->reset_pin); |
| |
| 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); |
| sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int 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 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; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, |
| edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); |
| |
| static const struct i2c_device_id edt_ft5x06_ts_id[] = { |
| { "edt-ft5x06", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); |
| |
| static struct i2c_driver edt_ft5x06_ts_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "edt_ft5x06", |
| .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 <simon.budig@kernelconcepts.de>"); |
| MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); |
| MODULE_LICENSE("GPL"); |