| /* |
| * ADIS16220 Programmable Digital Vibration Sensor driver |
| * |
| * Copyright 2010 Analog Devices Inc. |
| * |
| * Licensed under the GPL-2 or later. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/mutex.h> |
| #include <linux/device.h> |
| #include <linux/kernel.h> |
| #include <linux/spi/spi.h> |
| #include <linux/slab.h> |
| #include <linux/sysfs.h> |
| #include <linux/module.h> |
| |
| #include "../iio.h" |
| #include "../sysfs.h" |
| |
| #include "adis16220.h" |
| |
| #define DRIVER_NAME "adis16220" |
| |
| /** |
| * adis16220_spi_write_reg_8() - write single byte to a register |
| * @indio_dev: iio device associated with child of actual device |
| * @reg_address: the address of the register to be written |
| * @val: the value to write |
| **/ |
| static int adis16220_spi_write_reg_8(struct iio_dev *indio_dev, |
| u8 reg_address, |
| u8 val) |
| { |
| int ret; |
| struct adis16220_state *st = iio_priv(indio_dev); |
| |
| mutex_lock(&st->buf_lock); |
| st->tx[0] = ADIS16220_WRITE_REG(reg_address); |
| st->tx[1] = val; |
| |
| ret = spi_write(st->us, st->tx, 2); |
| mutex_unlock(&st->buf_lock); |
| |
| return ret; |
| } |
| |
| /** |
| * adis16220_spi_write_reg_16() - write 2 bytes to a pair of registers |
| * @indio_dev: iio device associated with child of actual device |
| * @reg_address: the address of the lower of the two registers. Second register |
| * is assumed to have address one greater. |
| * @val: value to be written |
| **/ |
| static int adis16220_spi_write_reg_16(struct iio_dev *indio_dev, |
| u8 lower_reg_address, |
| u16 value) |
| { |
| int ret; |
| struct spi_message msg; |
| struct adis16220_state *st = iio_priv(indio_dev); |
| struct spi_transfer xfers[] = { |
| { |
| .tx_buf = st->tx, |
| .bits_per_word = 8, |
| .len = 2, |
| .cs_change = 1, |
| .delay_usecs = 35, |
| }, { |
| .tx_buf = st->tx + 2, |
| .bits_per_word = 8, |
| .len = 2, |
| .delay_usecs = 35, |
| }, |
| }; |
| |
| mutex_lock(&st->buf_lock); |
| st->tx[0] = ADIS16220_WRITE_REG(lower_reg_address); |
| st->tx[1] = value & 0xFF; |
| st->tx[2] = ADIS16220_WRITE_REG(lower_reg_address + 1); |
| st->tx[3] = (value >> 8) & 0xFF; |
| |
| spi_message_init(&msg); |
| spi_message_add_tail(&xfers[0], &msg); |
| spi_message_add_tail(&xfers[1], &msg); |
| ret = spi_sync(st->us, &msg); |
| mutex_unlock(&st->buf_lock); |
| |
| return ret; |
| } |
| |
| /** |
| * adis16220_spi_read_reg_16() - read 2 bytes from a 16-bit register |
| * @indio_dev: iio device associated with child of actual device |
| * @reg_address: the address of the lower of the two registers. Second register |
| * is assumed to have address one greater. |
| * @val: somewhere to pass back the value read |
| **/ |
| static int adis16220_spi_read_reg_16(struct iio_dev *indio_dev, |
| u8 lower_reg_address, |
| u16 *val) |
| { |
| struct spi_message msg; |
| struct adis16220_state *st = iio_priv(indio_dev); |
| int ret; |
| struct spi_transfer xfers[] = { |
| { |
| .tx_buf = st->tx, |
| .bits_per_word = 8, |
| .len = 2, |
| .cs_change = 1, |
| .delay_usecs = 35, |
| }, { |
| .rx_buf = st->rx, |
| .bits_per_word = 8, |
| .len = 2, |
| .cs_change = 1, |
| .delay_usecs = 35, |
| }, |
| }; |
| |
| mutex_lock(&st->buf_lock); |
| st->tx[0] = ADIS16220_READ_REG(lower_reg_address); |
| st->tx[1] = 0; |
| |
| spi_message_init(&msg); |
| spi_message_add_tail(&xfers[0], &msg); |
| spi_message_add_tail(&xfers[1], &msg); |
| ret = spi_sync(st->us, &msg); |
| if (ret) { |
| dev_err(&st->us->dev, |
| "problem when reading 16 bit register 0x%02X", |
| lower_reg_address); |
| goto error_ret; |
| } |
| *val = (st->rx[0] << 8) | st->rx[1]; |
| |
| error_ret: |
| mutex_unlock(&st->buf_lock); |
| return ret; |
| } |
| |
| static ssize_t adis16220_read_16bit(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| ssize_t ret; |
| s16 val = 0; |
| |
| /* Take the iio_dev status lock */ |
| mutex_lock(&indio_dev->mlock); |
| ret = adis16220_spi_read_reg_16(indio_dev, this_attr->address, |
| (u16 *)&val); |
| mutex_unlock(&indio_dev->mlock); |
| if (ret) |
| return ret; |
| return sprintf(buf, "%d\n", val); |
| } |
| |
| static ssize_t adis16220_write_16bit(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, |
| size_t len) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| int ret; |
| long val; |
| |
| ret = strict_strtol(buf, 10, &val); |
| if (ret) |
| goto error_ret; |
| ret = adis16220_spi_write_reg_16(indio_dev, this_attr->address, val); |
| |
| error_ret: |
| return ret ? ret : len; |
| } |
| |
| static int adis16220_capture(struct iio_dev *indio_dev) |
| { |
| int ret; |
| ret = adis16220_spi_write_reg_16(indio_dev, |
| ADIS16220_GLOB_CMD, |
| 0xBF08); /* initiates a manual data capture */ |
| if (ret) |
| dev_err(&indio_dev->dev, "problem beginning capture"); |
| |
| msleep(10); /* delay for capture to finish */ |
| |
| return ret; |
| } |
| |
| static int adis16220_reset(struct iio_dev *indio_dev) |
| { |
| int ret; |
| ret = adis16220_spi_write_reg_8(indio_dev, |
| ADIS16220_GLOB_CMD, |
| ADIS16220_GLOB_CMD_SW_RESET); |
| if (ret) |
| dev_err(&indio_dev->dev, "problem resetting device"); |
| |
| return ret; |
| } |
| |
| static ssize_t adis16220_write_reset(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| bool val; |
| int ret; |
| |
| ret = strtobool(buf, &val); |
| if (ret) |
| return ret; |
| if (!val) |
| return -EINVAL; |
| |
| ret = adis16220_reset(indio_dev); |
| if (ret) |
| return ret; |
| return len; |
| } |
| |
| static ssize_t adis16220_write_capture(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| bool val; |
| int ret; |
| |
| ret = strtobool(buf, &val); |
| if (ret) |
| return ret; |
| if (!val) |
| return -EINVAL; |
| ret = adis16220_capture(indio_dev); |
| if (ret) |
| return ret; |
| |
| return len; |
| } |
| |
| static int adis16220_check_status(struct iio_dev *indio_dev) |
| { |
| u16 status; |
| int ret; |
| |
| ret = adis16220_spi_read_reg_16(indio_dev, ADIS16220_DIAG_STAT, |
| &status); |
| |
| if (ret < 0) { |
| dev_err(&indio_dev->dev, "Reading status failed\n"); |
| goto error_ret; |
| } |
| ret = status & 0x7F; |
| |
| if (status & ADIS16220_DIAG_STAT_VIOLATION) |
| dev_err(&indio_dev->dev, |
| "Capture period violation/interruption\n"); |
| if (status & ADIS16220_DIAG_STAT_SPI_FAIL) |
| dev_err(&indio_dev->dev, "SPI failure\n"); |
| if (status & ADIS16220_DIAG_STAT_FLASH_UPT) |
| dev_err(&indio_dev->dev, "Flash update failed\n"); |
| if (status & ADIS16220_DIAG_STAT_POWER_HIGH) |
| dev_err(&indio_dev->dev, "Power supply above 3.625V\n"); |
| if (status & ADIS16220_DIAG_STAT_POWER_LOW) |
| dev_err(&indio_dev->dev, "Power supply below 3.15V\n"); |
| |
| error_ret: |
| return ret; |
| } |
| |
| static int adis16220_self_test(struct iio_dev *indio_dev) |
| { |
| int ret; |
| ret = adis16220_spi_write_reg_16(indio_dev, |
| ADIS16220_MSC_CTRL, |
| ADIS16220_MSC_CTRL_SELF_TEST_EN); |
| if (ret) { |
| dev_err(&indio_dev->dev, "problem starting self test"); |
| goto err_ret; |
| } |
| |
| adis16220_check_status(indio_dev); |
| |
| err_ret: |
| return ret; |
| } |
| |
| static int adis16220_initial_setup(struct iio_dev *indio_dev) |
| { |
| int ret; |
| |
| /* Do self test */ |
| ret = adis16220_self_test(indio_dev); |
| if (ret) { |
| dev_err(&indio_dev->dev, "self test failure"); |
| goto err_ret; |
| } |
| |
| /* Read status register to check the result */ |
| ret = adis16220_check_status(indio_dev); |
| if (ret) { |
| adis16220_reset(indio_dev); |
| dev_err(&indio_dev->dev, "device not playing ball -> reset"); |
| msleep(ADIS16220_STARTUP_DELAY); |
| ret = adis16220_check_status(indio_dev); |
| if (ret) { |
| dev_err(&indio_dev->dev, "giving up"); |
| goto err_ret; |
| } |
| } |
| |
| err_ret: |
| return ret; |
| } |
| |
| static ssize_t adis16220_capture_buffer_read(struct iio_dev *indio_dev, |
| char *buf, |
| loff_t off, |
| size_t count, |
| int addr) |
| { |
| struct adis16220_state *st = iio_priv(indio_dev); |
| struct spi_message msg; |
| struct spi_transfer xfers[] = { |
| { |
| .tx_buf = st->tx, |
| .bits_per_word = 8, |
| .len = 2, |
| .cs_change = 1, |
| .delay_usecs = 25, |
| }, { |
| .tx_buf = st->tx, |
| .rx_buf = st->rx, |
| .bits_per_word = 8, |
| .cs_change = 1, |
| .delay_usecs = 25, |
| }, |
| }; |
| int ret; |
| int i; |
| |
| if (unlikely(!count)) |
| return count; |
| |
| if ((off >= ADIS16220_CAPTURE_SIZE) || (count & 1) || (off & 1)) |
| return -EINVAL; |
| |
| if (off + count > ADIS16220_CAPTURE_SIZE) |
| count = ADIS16220_CAPTURE_SIZE - off; |
| |
| /* write the begin position of capture buffer */ |
| ret = adis16220_spi_write_reg_16(indio_dev, |
| ADIS16220_CAPT_PNTR, |
| off > 1); |
| if (ret) |
| return -EIO; |
| |
| /* read count/2 values from capture buffer */ |
| mutex_lock(&st->buf_lock); |
| |
| for (i = 0; i < count; i += 2) { |
| st->tx[i] = ADIS16220_READ_REG(addr); |
| st->tx[i + 1] = 0; |
| } |
| xfers[1].len = count; |
| |
| spi_message_init(&msg); |
| spi_message_add_tail(&xfers[0], &msg); |
| spi_message_add_tail(&xfers[1], &msg); |
| ret = spi_sync(st->us, &msg); |
| if (ret) { |
| |
| mutex_unlock(&st->buf_lock); |
| return -EIO; |
| } |
| |
| memcpy(buf, st->rx, count); |
| |
| mutex_unlock(&st->buf_lock); |
| return count; |
| } |
| |
| static ssize_t adis16220_accel_bin_read(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *attr, |
| char *buf, |
| loff_t off, |
| size_t count) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| |
| return adis16220_capture_buffer_read(indio_dev, buf, |
| off, count, |
| ADIS16220_CAPT_BUFA); |
| } |
| |
| static struct bin_attribute accel_bin = { |
| .attr = { |
| .name = "accel_bin", |
| .mode = S_IRUGO, |
| }, |
| .read = adis16220_accel_bin_read, |
| .size = ADIS16220_CAPTURE_SIZE, |
| }; |
| |
| static ssize_t adis16220_adc1_bin_read(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *attr, |
| char *buf, loff_t off, |
| size_t count) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| |
| return adis16220_capture_buffer_read(indio_dev, buf, |
| off, count, |
| ADIS16220_CAPT_BUF1); |
| } |
| |
| static struct bin_attribute adc1_bin = { |
| .attr = { |
| .name = "in0_bin", |
| .mode = S_IRUGO, |
| }, |
| .read = adis16220_adc1_bin_read, |
| .size = ADIS16220_CAPTURE_SIZE, |
| }; |
| |
| static ssize_t adis16220_adc2_bin_read(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *attr, |
| char *buf, loff_t off, |
| size_t count) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| |
| return adis16220_capture_buffer_read(indio_dev, buf, |
| off, count, |
| ADIS16220_CAPT_BUF2); |
| } |
| |
| |
| static struct bin_attribute adc2_bin = { |
| .attr = { |
| .name = "in1_bin", |
| .mode = S_IRUGO, |
| }, |
| .read = adis16220_adc2_bin_read, |
| .size = ADIS16220_CAPTURE_SIZE, |
| }; |
| |
| static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, |
| adis16220_write_reset, 0); |
| |
| #define IIO_DEV_ATTR_CAPTURE(_store) \ |
| IIO_DEVICE_ATTR(capture, S_IWUSR, NULL, _store, 0) |
| |
| static IIO_DEV_ATTR_CAPTURE(adis16220_write_capture); |
| |
| #define IIO_DEV_ATTR_CAPTURE_COUNT(_mode, _show, _store, _addr) \ |
| IIO_DEVICE_ATTR(capture_count, _mode, _show, _store, _addr) |
| |
| static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO, |
| adis16220_read_16bit, |
| adis16220_write_16bit, |
| ADIS16220_CAPT_PNTR); |
| |
| enum adis16220_channel { |
| in_supply, in_1, in_2, accel, temp |
| }; |
| |
| struct adis16220_address_spec { |
| u8 addr; |
| u8 bits; |
| bool sign; |
| }; |
| |
| /* Address / bits / signed */ |
| static const struct adis16220_address_spec adis16220_addresses[][3] = { |
| [in_supply] = { { ADIS16220_CAPT_SUPPLY, 12, 0 }, }, |
| [in_1] = { { ADIS16220_CAPT_BUF1, 16, 1 }, |
| { ADIS16220_AIN1_NULL, 16, 1 }, |
| { ADIS16220_CAPT_PEAK1, 16, 1 }, }, |
| [in_2] = { { ADIS16220_CAPT_BUF2, 16, 1 }, |
| { ADIS16220_AIN2_NULL, 16, 1 }, |
| { ADIS16220_CAPT_PEAK2, 16, 1 }, }, |
| [accel] = { { ADIS16220_CAPT_BUFA, 16, 1 }, |
| { ADIS16220_ACCL_NULL, 16, 1 }, |
| { ADIS16220_CAPT_PEAKA, 16, 1 }, }, |
| [temp] = { { ADIS16220_CAPT_TEMP, 12, 0 }, } |
| }; |
| |
| static int adis16220_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| int *val, int *val2, |
| long mask) |
| { |
| int ret = -EINVAL; |
| int addrind = 0; |
| u16 uval; |
| s16 sval; |
| u8 bits; |
| |
| switch (mask) { |
| case 0: |
| addrind = 0; |
| break; |
| case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): |
| if (chan->type == IIO_TEMP) { |
| *val = 25; |
| return IIO_VAL_INT; |
| } |
| addrind = 1; |
| break; |
| case (1 << IIO_CHAN_INFO_PEAK_SEPARATE): |
| addrind = 2; |
| break; |
| case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): |
| *val = 0; |
| switch (chan->type) { |
| case IIO_TEMP: |
| *val2 = -470000; |
| return IIO_VAL_INT_PLUS_MICRO; |
| case IIO_ACCEL: |
| *val2 = 1887042; |
| return IIO_VAL_INT_PLUS_MICRO; |
| case IIO_VOLTAGE: |
| if (chan->channel == 0) |
| *val2 = 0012221; |
| else /* Should really be dependent on VDD */ |
| *val2 = 305; |
| return IIO_VAL_INT_PLUS_MICRO; |
| default: |
| return -EINVAL; |
| } |
| default: |
| return -EINVAL; |
| } |
| if (adis16220_addresses[chan->address][addrind].sign) { |
| ret = adis16220_spi_read_reg_16(indio_dev, |
| adis16220_addresses[chan |
| ->address] |
| [addrind].addr, |
| &sval); |
| if (ret) |
| return ret; |
| bits = adis16220_addresses[chan->address][addrind].bits; |
| sval &= (1 << bits) - 1; |
| sval = (s16)(sval << (16 - bits)) >> (16 - bits); |
| *val = sval; |
| return IIO_VAL_INT; |
| } else { |
| ret = adis16220_spi_read_reg_16(indio_dev, |
| adis16220_addresses[chan |
| ->address] |
| [addrind].addr, |
| &uval); |
| if (ret) |
| return ret; |
| bits = adis16220_addresses[chan->address][addrind].bits; |
| uval &= (1 << bits) - 1; |
| *val = uval; |
| return IIO_VAL_INT; |
| } |
| } |
| |
| static const struct iio_chan_spec adis16220_channels[] = { |
| { |
| .type = IIO_VOLTAGE, |
| .indexed = 1, |
| .channel = 0, |
| .extend_name = "supply", |
| .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| .address = in_supply, |
| }, { |
| .type = IIO_ACCEL, |
| .info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) | |
| (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | |
| (1 << IIO_CHAN_INFO_PEAK_SEPARATE), |
| .address = accel, |
| }, { |
| .type = IIO_TEMP, |
| .indexed = 1, |
| .channel = 0, |
| .info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) | |
| (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| .address = temp, |
| }, { |
| .type = IIO_VOLTAGE, |
| .indexed = 1, |
| .channel = 1, |
| .info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) | |
| (1 << IIO_CHAN_INFO_SCALE_SEPARATE), |
| .address = in_1, |
| }, { |
| .type = IIO_VOLTAGE, |
| .indexed = 1, |
| .channel = 2, |
| .address = in_2, |
| } |
| }; |
| |
| static struct attribute *adis16220_attributes[] = { |
| &iio_dev_attr_reset.dev_attr.attr, |
| &iio_dev_attr_capture.dev_attr.attr, |
| &iio_dev_attr_capture_count.dev_attr.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group adis16220_attribute_group = { |
| .attrs = adis16220_attributes, |
| }; |
| |
| static const struct iio_info adis16220_info = { |
| .attrs = &adis16220_attribute_group, |
| .driver_module = THIS_MODULE, |
| .read_raw = &adis16220_read_raw, |
| }; |
| |
| static int __devinit adis16220_probe(struct spi_device *spi) |
| { |
| int ret; |
| struct adis16220_state *st; |
| struct iio_dev *indio_dev; |
| |
| /* setup the industrialio driver allocated elements */ |
| indio_dev = iio_allocate_device(sizeof(*st)); |
| if (indio_dev == NULL) { |
| ret = -ENOMEM; |
| goto error_ret; |
| } |
| |
| st = iio_priv(indio_dev); |
| /* this is only used for removal purposes */ |
| spi_set_drvdata(spi, indio_dev); |
| |
| st->us = spi; |
| mutex_init(&st->buf_lock); |
| |
| indio_dev->name = spi->dev.driver->name; |
| indio_dev->dev.parent = &spi->dev; |
| indio_dev->info = &adis16220_info; |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| indio_dev->channels = adis16220_channels; |
| indio_dev->num_channels = ARRAY_SIZE(adis16220_channels); |
| |
| ret = iio_device_register(indio_dev); |
| if (ret) |
| goto error_free_dev; |
| |
| ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &accel_bin); |
| if (ret) |
| goto error_unregister_dev; |
| |
| ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc1_bin); |
| if (ret) |
| goto error_rm_accel_bin; |
| |
| ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc2_bin); |
| if (ret) |
| goto error_rm_adc1_bin; |
| |
| /* Get the device into a sane initial state */ |
| ret = adis16220_initial_setup(indio_dev); |
| if (ret) |
| goto error_rm_adc2_bin; |
| return 0; |
| |
| error_rm_adc2_bin: |
| sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin); |
| error_rm_adc1_bin: |
| sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin); |
| error_rm_accel_bin: |
| sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin); |
| error_unregister_dev: |
| iio_device_unregister(indio_dev); |
| error_free_dev: |
| iio_free_device(indio_dev); |
| error_ret: |
| return ret; |
| } |
| |
| static int adis16220_remove(struct spi_device *spi) |
| { |
| struct iio_dev *indio_dev = spi_get_drvdata(spi); |
| |
| flush_scheduled_work(); |
| |
| sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin); |
| sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin); |
| sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin); |
| iio_device_unregister(indio_dev); |
| iio_free_device(indio_dev); |
| |
| return 0; |
| } |
| |
| static struct spi_driver adis16220_driver = { |
| .driver = { |
| .name = "adis16220", |
| .owner = THIS_MODULE, |
| }, |
| .probe = adis16220_probe, |
| .remove = __devexit_p(adis16220_remove), |
| }; |
| |
| static __init int adis16220_init(void) |
| { |
| return spi_register_driver(&adis16220_driver); |
| } |
| module_init(adis16220_init); |
| |
| static __exit void adis16220_exit(void) |
| { |
| spi_unregister_driver(&adis16220_driver); |
| } |
| module_exit(adis16220_exit); |
| |
| MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor"); |
| MODULE_LICENSE("GPL v2"); |