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![Lars-Peter Clausen](/assets/img/avatar_default.png)
Update DAC drivers powerdown attribute show callback to use the new sysfs_emit() function. sysfs_emit() is preferred over raw s*printf() for sysfs attributes since it knows about the sysfs buffer specifics and has some built-in sanity checks. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Link: https://lore.kernel.org/r/20210320071405.9347-5-lars@metafoo.de Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
694 lines
17 KiB
C
694 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* AD5770R Digital to analog converters driver
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*
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* Copyright 2018 Analog Devices Inc.
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*/
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#include <linux/bits.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/spi/spi.h>
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#define ADI_SPI_IF_CONFIG_A 0x00
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#define ADI_SPI_IF_CONFIG_B 0x01
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#define ADI_SPI_IF_DEVICE_CONFIG 0x02
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#define ADI_SPI_IF_CHIP_TYPE 0x03
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#define ADI_SPI_IF_PRODUCT_ID_L 0x04
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#define ADI_SPI_IF_PRODUCT_ID_H 0x05
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#define ADI_SPI_IF_CHIP_GRADE 0x06
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#define ADI_SPI_IF_SCRACTH_PAD 0x0A
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#define ADI_SPI_IF_SPI_REVISION 0x0B
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#define ADI_SPI_IF_SPI_VENDOR_L 0x0C
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#define ADI_SPI_IF_SPI_VENDOR_H 0x0D
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#define ADI_SPI_IF_SPI_STREAM_MODE 0x0E
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#define ADI_SPI_IF_CONFIG_C 0x10
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#define ADI_SPI_IF_STATUS_A 0x11
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/* ADI_SPI_IF_CONFIG_A */
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#define ADI_SPI_IF_SW_RESET_MSK (BIT(0) | BIT(7))
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#define ADI_SPI_IF_SW_RESET_SEL(x) ((x) & ADI_SPI_IF_SW_RESET_MSK)
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#define ADI_SPI_IF_ADDR_ASC_MSK (BIT(2) | BIT(5))
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#define ADI_SPI_IF_ADDR_ASC_SEL(x) (((x) << 2) & ADI_SPI_IF_ADDR_ASC_MSK)
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/* ADI_SPI_IF_CONFIG_B */
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#define ADI_SPI_IF_SINGLE_INS_MSK BIT(7)
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#define ADI_SPI_IF_SINGLE_INS_SEL(x) FIELD_PREP(ADI_SPI_IF_SINGLE_INS_MSK, x)
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#define ADI_SPI_IF_SHORT_INS_MSK BIT(7)
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#define ADI_SPI_IF_SHORT_INS_SEL(x) FIELD_PREP(ADI_SPI_IF_SINGLE_INS_MSK, x)
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/* ADI_SPI_IF_CONFIG_C */
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#define ADI_SPI_IF_STRICT_REG_MSK BIT(5)
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#define ADI_SPI_IF_STRICT_REG_GET(x) FIELD_GET(ADI_SPI_IF_STRICT_REG_MSK, x)
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/* AD5770R configuration registers */
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#define AD5770R_CHANNEL_CONFIG 0x14
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#define AD5770R_OUTPUT_RANGE(ch) (0x15 + (ch))
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#define AD5770R_FILTER_RESISTOR(ch) (0x1D + (ch))
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#define AD5770R_REFERENCE 0x1B
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#define AD5770R_DAC_LSB(ch) (0x26 + 2 * (ch))
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#define AD5770R_DAC_MSB(ch) (0x27 + 2 * (ch))
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#define AD5770R_CH_SELECT 0x34
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#define AD5770R_CH_ENABLE 0x44
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/* AD5770R_CHANNEL_CONFIG */
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#define AD5770R_CFG_CH0_SINK_EN(x) (((x) & 0x1) << 7)
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#define AD5770R_CFG_SHUTDOWN_B(x, ch) (((x) & 0x1) << (ch))
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/* AD5770R_OUTPUT_RANGE */
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#define AD5770R_RANGE_OUTPUT_SCALING(x) (((x) & GENMASK(5, 0)) << 2)
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#define AD5770R_RANGE_MODE(x) ((x) & GENMASK(1, 0))
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/* AD5770R_REFERENCE */
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#define AD5770R_REF_RESISTOR_SEL(x) (((x) & 0x1) << 2)
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#define AD5770R_REF_SEL(x) ((x) & GENMASK(1, 0))
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/* AD5770R_CH_ENABLE */
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#define AD5770R_CH_SET(x, ch) (((x) & 0x1) << (ch))
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#define AD5770R_MAX_CHANNELS 6
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#define AD5770R_MAX_CH_MODES 14
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#define AD5770R_LOW_VREF_mV 1250
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#define AD5770R_HIGH_VREF_mV 2500
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enum ad5770r_ch0_modes {
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AD5770R_CH0_0_300 = 0,
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AD5770R_CH0_NEG_60_0,
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AD5770R_CH0_NEG_60_300
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};
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enum ad5770r_ch1_modes {
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AD5770R_CH1_0_140_LOW_HEAD = 1,
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AD5770R_CH1_0_140_LOW_NOISE,
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AD5770R_CH1_0_250
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};
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enum ad5770r_ch2_5_modes {
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AD5770R_CH_LOW_RANGE = 0,
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AD5770R_CH_HIGH_RANGE
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};
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enum ad5770r_ref_v {
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AD5770R_EXT_2_5_V = 0,
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AD5770R_INT_1_25_V_OUT_ON,
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AD5770R_EXT_1_25_V,
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AD5770R_INT_1_25_V_OUT_OFF
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};
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enum ad5770r_output_filter_resistor {
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AD5770R_FILTER_60_OHM = 0x0,
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AD5770R_FILTER_5_6_KOHM = 0x5,
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AD5770R_FILTER_11_2_KOHM,
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AD5770R_FILTER_22_2_KOHM,
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AD5770R_FILTER_44_4_KOHM,
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AD5770R_FILTER_104_KOHM,
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};
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struct ad5770r_out_range {
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u8 out_scale;
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u8 out_range_mode;
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};
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/**
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* struct ad5770r_state - driver instance specific data
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* @spi: spi_device
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* @regmap: regmap
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* @vref_reg: fixed regulator for reference configuration
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* @gpio_reset: gpio descriptor
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* @output_mode: array contains channels output ranges
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* @vref: reference value
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* @ch_pwr_down: powerdown flags
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* @internal_ref: internal reference flag
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* @external_res: external 2.5k resistor flag
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* @transf_buf: cache aligned buffer for spi read/write
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*/
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struct ad5770r_state {
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struct spi_device *spi;
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struct regmap *regmap;
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struct regulator *vref_reg;
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struct gpio_desc *gpio_reset;
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struct ad5770r_out_range output_mode[AD5770R_MAX_CHANNELS];
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int vref;
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bool ch_pwr_down[AD5770R_MAX_CHANNELS];
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bool internal_ref;
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bool external_res;
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u8 transf_buf[2] ____cacheline_aligned;
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};
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static const struct regmap_config ad5770r_spi_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.read_flag_mask = BIT(7),
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};
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struct ad5770r_output_modes {
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unsigned int ch;
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u8 mode;
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int min;
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int max;
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};
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static struct ad5770r_output_modes ad5770r_rng_tbl[] = {
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{ 0, AD5770R_CH0_0_300, 0, 300 },
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{ 0, AD5770R_CH0_NEG_60_0, -60, 0 },
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{ 0, AD5770R_CH0_NEG_60_300, -60, 300 },
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{ 1, AD5770R_CH1_0_140_LOW_HEAD, 0, 140 },
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{ 1, AD5770R_CH1_0_140_LOW_NOISE, 0, 140 },
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{ 1, AD5770R_CH1_0_250, 0, 250 },
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{ 2, AD5770R_CH_LOW_RANGE, 0, 55 },
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{ 2, AD5770R_CH_HIGH_RANGE, 0, 150 },
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{ 3, AD5770R_CH_LOW_RANGE, 0, 45 },
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{ 3, AD5770R_CH_HIGH_RANGE, 0, 100 },
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{ 4, AD5770R_CH_LOW_RANGE, 0, 45 },
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{ 4, AD5770R_CH_HIGH_RANGE, 0, 100 },
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{ 5, AD5770R_CH_LOW_RANGE, 0, 45 },
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{ 5, AD5770R_CH_HIGH_RANGE, 0, 100 },
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};
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static const unsigned int ad5770r_filter_freqs[] = {
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153, 357, 715, 1400, 2800, 262000,
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};
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static const unsigned int ad5770r_filter_reg_vals[] = {
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AD5770R_FILTER_104_KOHM,
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AD5770R_FILTER_44_4_KOHM,
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AD5770R_FILTER_22_2_KOHM,
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AD5770R_FILTER_11_2_KOHM,
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AD5770R_FILTER_5_6_KOHM,
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AD5770R_FILTER_60_OHM
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};
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static int ad5770r_set_output_mode(struct ad5770r_state *st,
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const struct ad5770r_out_range *out_mode,
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int channel)
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{
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unsigned int regval;
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regval = AD5770R_RANGE_OUTPUT_SCALING(out_mode->out_scale) |
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AD5770R_RANGE_MODE(out_mode->out_range_mode);
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return regmap_write(st->regmap,
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AD5770R_OUTPUT_RANGE(channel), regval);
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}
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static int ad5770r_set_reference(struct ad5770r_state *st)
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{
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unsigned int regval;
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regval = AD5770R_REF_RESISTOR_SEL(st->external_res);
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if (st->internal_ref) {
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regval |= AD5770R_REF_SEL(AD5770R_INT_1_25_V_OUT_OFF);
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} else {
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switch (st->vref) {
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case AD5770R_LOW_VREF_mV:
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regval |= AD5770R_REF_SEL(AD5770R_EXT_1_25_V);
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break;
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case AD5770R_HIGH_VREF_mV:
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regval |= AD5770R_REF_SEL(AD5770R_EXT_2_5_V);
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break;
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default:
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regval = AD5770R_REF_SEL(AD5770R_INT_1_25_V_OUT_OFF);
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break;
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}
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}
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return regmap_write(st->regmap, AD5770R_REFERENCE, regval);
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}
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static int ad5770r_soft_reset(struct ad5770r_state *st)
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{
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return regmap_write(st->regmap, ADI_SPI_IF_CONFIG_A,
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ADI_SPI_IF_SW_RESET_SEL(1));
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}
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static int ad5770r_reset(struct ad5770r_state *st)
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{
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/* Perform software reset if no GPIO provided */
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if (!st->gpio_reset)
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return ad5770r_soft_reset(st);
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gpiod_set_value_cansleep(st->gpio_reset, 0);
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usleep_range(10, 20);
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gpiod_set_value_cansleep(st->gpio_reset, 1);
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/* data must not be written during reset timeframe */
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usleep_range(100, 200);
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return 0;
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}
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static int ad5770r_get_range(struct ad5770r_state *st,
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int ch, int *min, int *max)
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{
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int i;
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u8 tbl_ch, tbl_mode, out_range;
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out_range = st->output_mode[ch].out_range_mode;
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for (i = 0; i < AD5770R_MAX_CH_MODES; i++) {
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tbl_ch = ad5770r_rng_tbl[i].ch;
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tbl_mode = ad5770r_rng_tbl[i].mode;
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if (tbl_ch == ch && tbl_mode == out_range) {
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*min = ad5770r_rng_tbl[i].min;
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*max = ad5770r_rng_tbl[i].max;
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return 0;
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}
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}
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return -EINVAL;
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}
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static int ad5770r_get_filter_freq(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan, int *freq)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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int ret;
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unsigned int regval, i;
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ret = regmap_read(st->regmap,
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AD5770R_FILTER_RESISTOR(chan->channel), ®val);
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if (ret < 0)
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return ret;
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for (i = 0; i < ARRAY_SIZE(ad5770r_filter_reg_vals); i++)
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if (regval == ad5770r_filter_reg_vals[i])
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break;
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if (i == ARRAY_SIZE(ad5770r_filter_reg_vals))
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return -EINVAL;
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*freq = ad5770r_filter_freqs[i];
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return IIO_VAL_INT;
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}
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static int ad5770r_set_filter_freq(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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unsigned int freq)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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unsigned int regval, i;
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for (i = 0; i < ARRAY_SIZE(ad5770r_filter_freqs); i++)
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if (ad5770r_filter_freqs[i] >= freq)
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break;
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if (i == ARRAY_SIZE(ad5770r_filter_freqs))
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return -EINVAL;
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regval = ad5770r_filter_reg_vals[i];
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return regmap_write(st->regmap, AD5770R_FILTER_RESISTOR(chan->channel),
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regval);
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}
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static int ad5770r_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long info)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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int max, min, ret;
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u16 buf16;
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switch (info) {
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case IIO_CHAN_INFO_RAW:
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ret = regmap_bulk_read(st->regmap,
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chan->address,
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st->transf_buf, 2);
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if (ret)
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return 0;
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buf16 = st->transf_buf[0] + (st->transf_buf[1] << 8);
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*val = buf16 >> 2;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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ret = ad5770r_get_range(st, chan->channel, &min, &max);
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if (ret < 0)
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return ret;
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*val = max - min;
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/* There is no sign bit. (negative current is mapped from 0)
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* (sourced/sinked) current = raw * scale + offset
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* where offset in case of CH0 can be negative.
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*/
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*val2 = 14;
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return IIO_VAL_FRACTIONAL_LOG2;
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case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
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return ad5770r_get_filter_freq(indio_dev, chan, val);
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case IIO_CHAN_INFO_OFFSET:
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ret = ad5770r_get_range(st, chan->channel, &min, &max);
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if (ret < 0)
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return ret;
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*val = min;
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return IIO_VAL_INT;
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default:
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return -EINVAL;
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}
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}
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static int ad5770r_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val, int val2, long info)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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switch (info) {
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case IIO_CHAN_INFO_RAW:
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st->transf_buf[0] = ((u16)val >> 6);
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st->transf_buf[1] = (val & GENMASK(5, 0)) << 2;
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return regmap_bulk_write(st->regmap, chan->address,
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st->transf_buf, 2);
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case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
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return ad5770r_set_filter_freq(indio_dev, chan, val);
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default:
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return -EINVAL;
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}
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}
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static int ad5770r_read_freq_avail(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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const int **vals, int *type, int *length,
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long mask)
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{
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switch (mask) {
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case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
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*type = IIO_VAL_INT;
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*vals = ad5770r_filter_freqs;
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*length = ARRAY_SIZE(ad5770r_filter_freqs);
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return IIO_AVAIL_LIST;
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}
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return -EINVAL;
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}
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static int ad5770r_reg_access(struct iio_dev *indio_dev,
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unsigned int reg,
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unsigned int writeval,
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unsigned int *readval)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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if (readval)
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return regmap_read(st->regmap, reg, readval);
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else
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return regmap_write(st->regmap, reg, writeval);
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}
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static const struct iio_info ad5770r_info = {
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.read_raw = ad5770r_read_raw,
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.write_raw = ad5770r_write_raw,
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.read_avail = ad5770r_read_freq_avail,
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.debugfs_reg_access = &ad5770r_reg_access,
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};
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static int ad5770r_store_output_range(struct ad5770r_state *st,
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int min, int max, int index)
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{
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int i;
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for (i = 0; i < AD5770R_MAX_CH_MODES; i++) {
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if (ad5770r_rng_tbl[i].ch != index)
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continue;
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if (ad5770r_rng_tbl[i].min != min ||
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ad5770r_rng_tbl[i].max != max)
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continue;
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st->output_mode[index].out_range_mode = ad5770r_rng_tbl[i].mode;
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return 0;
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}
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return -EINVAL;
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}
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static ssize_t ad5770r_read_dac_powerdown(struct iio_dev *indio_dev,
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uintptr_t private,
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const struct iio_chan_spec *chan,
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char *buf)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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return sysfs_emit(buf, "%d\n", st->ch_pwr_down[chan->channel]);
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}
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static ssize_t ad5770r_write_dac_powerdown(struct iio_dev *indio_dev,
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uintptr_t private,
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const struct iio_chan_spec *chan,
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const char *buf, size_t len)
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{
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struct ad5770r_state *st = iio_priv(indio_dev);
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unsigned int regval;
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unsigned int mask;
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bool readin;
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int ret;
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ret = kstrtobool(buf, &readin);
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if (ret)
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return ret;
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readin = !readin;
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regval = AD5770R_CFG_SHUTDOWN_B(readin, chan->channel);
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if (chan->channel == 0 &&
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st->output_mode[0].out_range_mode > AD5770R_CH0_0_300) {
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regval |= AD5770R_CFG_CH0_SINK_EN(readin);
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mask = BIT(chan->channel) + BIT(7);
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} else {
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mask = BIT(chan->channel);
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}
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ret = regmap_update_bits(st->regmap, AD5770R_CHANNEL_CONFIG, mask,
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regval);
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if (ret)
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return ret;
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regval = AD5770R_CH_SET(readin, chan->channel);
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ret = regmap_update_bits(st->regmap, AD5770R_CH_ENABLE,
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BIT(chan->channel), regval);
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if (ret)
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return ret;
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st->ch_pwr_down[chan->channel] = !readin;
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return len;
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}
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static const struct iio_chan_spec_ext_info ad5770r_ext_info[] = {
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{
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.name = "powerdown",
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.read = ad5770r_read_dac_powerdown,
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.write = ad5770r_write_dac_powerdown,
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.shared = IIO_SEPARATE,
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},
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{ }
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};
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#define AD5770R_IDAC_CHANNEL(index, reg) { \
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.type = IIO_CURRENT, \
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.address = reg, \
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.indexed = 1, \
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.channel = index, \
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.output = 1, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
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BIT(IIO_CHAN_INFO_SCALE) | \
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BIT(IIO_CHAN_INFO_OFFSET) | \
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BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
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.info_mask_shared_by_type_available = \
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BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
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.ext_info = ad5770r_ext_info, \
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}
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static const struct iio_chan_spec ad5770r_channels[] = {
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AD5770R_IDAC_CHANNEL(0, AD5770R_DAC_MSB(0)),
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AD5770R_IDAC_CHANNEL(1, AD5770R_DAC_MSB(1)),
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AD5770R_IDAC_CHANNEL(2, AD5770R_DAC_MSB(2)),
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AD5770R_IDAC_CHANNEL(3, AD5770R_DAC_MSB(3)),
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AD5770R_IDAC_CHANNEL(4, AD5770R_DAC_MSB(4)),
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AD5770R_IDAC_CHANNEL(5, AD5770R_DAC_MSB(5)),
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};
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static int ad5770r_channel_config(struct ad5770r_state *st)
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{
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int ret, tmp[2], min, max;
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unsigned int num;
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struct fwnode_handle *child;
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num = device_get_child_node_count(&st->spi->dev);
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if (num != AD5770R_MAX_CHANNELS)
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return -EINVAL;
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device_for_each_child_node(&st->spi->dev, child) {
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ret = fwnode_property_read_u32(child, "num", &num);
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if (ret)
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return ret;
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if (num >= AD5770R_MAX_CHANNELS)
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return -EINVAL;
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ret = fwnode_property_read_u32_array(child,
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"adi,range-microamp",
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tmp, 2);
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if (ret)
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return ret;
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min = tmp[0] / 1000;
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max = tmp[1] / 1000;
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ret = ad5770r_store_output_range(st, min, max, num);
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if (ret)
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return ret;
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}
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return ret;
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}
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static int ad5770r_init(struct ad5770r_state *st)
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{
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int ret, i;
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st->gpio_reset = devm_gpiod_get_optional(&st->spi->dev, "reset",
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GPIOD_OUT_HIGH);
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if (IS_ERR(st->gpio_reset))
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return PTR_ERR(st->gpio_reset);
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/* Perform a reset */
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ret = ad5770r_reset(st);
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if (ret)
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return ret;
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/* Set output range */
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ret = ad5770r_channel_config(st);
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if (ret)
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return ret;
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for (i = 0; i < AD5770R_MAX_CHANNELS; i++) {
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ret = ad5770r_set_output_mode(st, &st->output_mode[i], i);
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if (ret)
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return ret;
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}
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st->external_res = fwnode_property_read_bool(st->spi->dev.fwnode,
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"adi,external-resistor");
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ret = ad5770r_set_reference(st);
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if (ret)
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return ret;
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/* Set outputs off */
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ret = regmap_write(st->regmap, AD5770R_CHANNEL_CONFIG, 0x00);
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if (ret)
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return ret;
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ret = regmap_write(st->regmap, AD5770R_CH_ENABLE, 0x00);
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if (ret)
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return ret;
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for (i = 0; i < AD5770R_MAX_CHANNELS; i++)
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st->ch_pwr_down[i] = true;
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return ret;
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}
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static void ad5770r_disable_regulator(void *data)
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{
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struct ad5770r_state *st = data;
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regulator_disable(st->vref_reg);
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}
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static int ad5770r_probe(struct spi_device *spi)
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{
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struct ad5770r_state *st;
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struct iio_dev *indio_dev;
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struct regmap *regmap;
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int ret;
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indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
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if (!indio_dev)
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return -ENOMEM;
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st = iio_priv(indio_dev);
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spi_set_drvdata(spi, indio_dev);
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st->spi = spi;
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regmap = devm_regmap_init_spi(spi, &ad5770r_spi_regmap_config);
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if (IS_ERR(regmap)) {
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dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
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PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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st->regmap = regmap;
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st->vref_reg = devm_regulator_get_optional(&spi->dev, "vref");
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if (!IS_ERR(st->vref_reg)) {
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ret = regulator_enable(st->vref_reg);
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if (ret) {
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dev_err(&spi->dev,
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"Failed to enable vref regulators: %d\n", ret);
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return ret;
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}
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ret = devm_add_action_or_reset(&spi->dev,
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ad5770r_disable_regulator,
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st);
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if (ret < 0)
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return ret;
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ret = regulator_get_voltage(st->vref_reg);
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if (ret < 0)
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return ret;
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st->vref = ret / 1000;
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} else {
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if (PTR_ERR(st->vref_reg) == -ENODEV) {
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st->vref = AD5770R_LOW_VREF_mV;
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|
st->internal_ref = true;
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} else {
|
|
return PTR_ERR(st->vref_reg);
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|
}
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|
}
|
|
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|
indio_dev->name = spi_get_device_id(spi)->name;
|
|
indio_dev->info = &ad5770r_info;
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|
indio_dev->modes = INDIO_DIRECT_MODE;
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|
indio_dev->channels = ad5770r_channels;
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|
indio_dev->num_channels = ARRAY_SIZE(ad5770r_channels);
|
|
|
|
ret = ad5770r_init(st);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "AD5770R init failed\n");
|
|
return ret;
|
|
}
|
|
|
|
return devm_iio_device_register(&st->spi->dev, indio_dev);
|
|
}
|
|
|
|
static const struct of_device_id ad5770r_of_id[] = {
|
|
{ .compatible = "adi,ad5770r", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ad5770r_of_id);
|
|
|
|
static const struct spi_device_id ad5770r_id[] = {
|
|
{ "ad5770r", 0 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, ad5770r_id);
|
|
|
|
static struct spi_driver ad5770r_driver = {
|
|
.driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.of_match_table = ad5770r_of_id,
|
|
},
|
|
.probe = ad5770r_probe,
|
|
.id_table = ad5770r_id,
|
|
};
|
|
|
|
module_spi_driver(ad5770r_driver);
|
|
|
|
MODULE_AUTHOR("Mircea Caprioru <mircea.caprioru@analog.com>");
|
|
MODULE_DESCRIPTION("Analog Devices AD5770R IDAC");
|
|
MODULE_LICENSE("GPL v2");
|