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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Sony CXD2820R demodulator driver
- *
- * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
- */
- #include "cxd2820r_priv.h"
- /* Write register table */
- int cxd2820r_wr_reg_val_mask_tab(struct cxd2820r_priv *priv,
- const struct reg_val_mask *tab, int tab_len)
- {
- struct i2c_client *client = priv->client[0];
- int ret;
- unsigned int i, reg, mask, val;
- struct regmap *regmap;
- dev_dbg(&client->dev, "tab_len=%d\n", tab_len);
- for (i = 0; i < tab_len; i++) {
- if ((tab[i].reg >> 16) & 0x1)
- regmap = priv->regmap[1];
- else
- regmap = priv->regmap[0];
- reg = (tab[i].reg >> 0) & 0xffff;
- val = tab[i].val;
- mask = tab[i].mask;
- if (mask == 0xff)
- ret = regmap_write(regmap, reg, val);
- else
- ret = regmap_write_bits(regmap, reg, mask, val);
- if (ret)
- goto error;
- }
- return 0;
- error:
- dev_dbg(&client->dev, "failed=%d\n", ret);
- return ret;
- }
- int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret, i;
- u8 tmp0, tmp1;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- /* update GPIOs only when needed */
- if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
- return 0;
- tmp0 = 0x00;
- tmp1 = 0x00;
- for (i = 0; i < sizeof(priv->gpio); i++) {
- /* enable / disable */
- if (gpio[i] & CXD2820R_GPIO_E)
- tmp0 |= (2 << 6) >> (2 * i);
- else
- tmp0 |= (1 << 6) >> (2 * i);
- /* input / output */
- if (gpio[i] & CXD2820R_GPIO_I)
- tmp1 |= (1 << (3 + i));
- else
- tmp1 |= (0 << (3 + i));
- /* high / low */
- if (gpio[i] & CXD2820R_GPIO_H)
- tmp1 |= (1 << (0 + i));
- else
- tmp1 |= (0 << (0 + i));
- dev_dbg(&client->dev, "gpio i=%d %02x %02x\n", i, tmp0, tmp1);
- }
- dev_dbg(&client->dev, "wr gpio=%02x %02x\n", tmp0, tmp1);
- /* write bits [7:2] */
- ret = regmap_update_bits(priv->regmap[0], 0x0089, 0xfc, tmp0);
- if (ret)
- goto error;
- /* write bits [5:0] */
- ret = regmap_update_bits(priv->regmap[0], 0x008e, 0x3f, tmp1);
- if (ret)
- goto error;
- memcpy(priv->gpio, gpio, sizeof(priv->gpio));
- return ret;
- error:
- dev_dbg(&client->dev, "failed=%d\n", ret);
- return ret;
- }
- static int cxd2820r_set_frontend(struct dvb_frontend *fe)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- switch (c->delivery_system) {
- case SYS_DVBT:
- ret = cxd2820r_init_t(fe);
- if (ret < 0)
- goto err;
- ret = cxd2820r_set_frontend_t(fe);
- if (ret < 0)
- goto err;
- break;
- case SYS_DVBT2:
- ret = cxd2820r_init_t(fe);
- if (ret < 0)
- goto err;
- ret = cxd2820r_set_frontend_t2(fe);
- if (ret < 0)
- goto err;
- break;
- case SYS_DVBC_ANNEX_A:
- ret = cxd2820r_init_c(fe);
- if (ret < 0)
- goto err;
- ret = cxd2820r_set_frontend_c(fe);
- if (ret < 0)
- goto err;
- break;
- default:
- dev_dbg(&client->dev, "invalid delivery_system\n");
- ret = -EINVAL;
- break;
- }
- err:
- return ret;
- }
- static int cxd2820r_read_status(struct dvb_frontend *fe, enum fe_status *status)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- switch (c->delivery_system) {
- case SYS_DVBT:
- ret = cxd2820r_read_status_t(fe, status);
- break;
- case SYS_DVBT2:
- ret = cxd2820r_read_status_t2(fe, status);
- break;
- case SYS_DVBC_ANNEX_A:
- ret = cxd2820r_read_status_c(fe, status);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- static int cxd2820r_get_frontend(struct dvb_frontend *fe,
- struct dtv_frontend_properties *p)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- if (priv->delivery_system == SYS_UNDEFINED)
- return 0;
- switch (c->delivery_system) {
- case SYS_DVBT:
- ret = cxd2820r_get_frontend_t(fe, p);
- break;
- case SYS_DVBT2:
- ret = cxd2820r_get_frontend_t2(fe, p);
- break;
- case SYS_DVBC_ANNEX_A:
- ret = cxd2820r_get_frontend_c(fe, p);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- *ber = (priv->post_bit_error - priv->post_bit_error_prev_dvbv3);
- priv->post_bit_error_prev_dvbv3 = priv->post_bit_error;
- return 0;
- }
- static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
- *strength = c->strength.stat[0].uvalue;
- else
- *strength = 0;
- return 0;
- }
- static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
- *snr = div_s64(c->cnr.stat[0].svalue, 100);
- else
- *snr = 0;
- return 0;
- }
- static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- *ucblocks = 0;
- return 0;
- }
- static int cxd2820r_init(struct dvb_frontend *fe)
- {
- return 0;
- }
- static int cxd2820r_sleep(struct dvb_frontend *fe)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- switch (c->delivery_system) {
- case SYS_DVBT:
- ret = cxd2820r_sleep_t(fe);
- break;
- case SYS_DVBT2:
- ret = cxd2820r_sleep_t2(fe);
- break;
- case SYS_DVBC_ANNEX_A:
- ret = cxd2820r_sleep_c(fe);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
- struct dvb_frontend_tune_settings *s)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- switch (c->delivery_system) {
- case SYS_DVBT:
- ret = cxd2820r_get_tune_settings_t(fe, s);
- break;
- case SYS_DVBT2:
- ret = cxd2820r_get_tune_settings_t2(fe, s);
- break;
- case SYS_DVBC_ANNEX_A:
- ret = cxd2820r_get_tune_settings_c(fe, s);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- int ret, i;
- enum fe_status status = 0;
- dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
- /* switch between DVB-T and DVB-T2 when tune fails */
- if (priv->last_tune_failed) {
- if (priv->delivery_system == SYS_DVBT) {
- ret = cxd2820r_sleep_t(fe);
- if (ret)
- goto error;
- c->delivery_system = SYS_DVBT2;
- } else if (priv->delivery_system == SYS_DVBT2) {
- ret = cxd2820r_sleep_t2(fe);
- if (ret)
- goto error;
- c->delivery_system = SYS_DVBT;
- }
- }
- /* set frontend */
- ret = cxd2820r_set_frontend(fe);
- if (ret)
- goto error;
- /* frontend lock wait loop count */
- switch (priv->delivery_system) {
- case SYS_DVBT:
- case SYS_DVBC_ANNEX_A:
- i = 20;
- break;
- case SYS_DVBT2:
- i = 40;
- break;
- case SYS_UNDEFINED:
- default:
- i = 0;
- break;
- }
- /* wait frontend lock */
- for (; i > 0; i--) {
- dev_dbg(&client->dev, "loop=%d\n", i);
- msleep(50);
- ret = cxd2820r_read_status(fe, &status);
- if (ret)
- goto error;
- if (status & FE_HAS_LOCK)
- break;
- }
- /* check if we have a valid signal */
- if (status & FE_HAS_LOCK) {
- priv->last_tune_failed = false;
- return DVBFE_ALGO_SEARCH_SUCCESS;
- } else {
- priv->last_tune_failed = true;
- return DVBFE_ALGO_SEARCH_AGAIN;
- }
- error:
- dev_dbg(&client->dev, "failed=%d\n", ret);
- return DVBFE_ALGO_SEARCH_ERROR;
- }
- static enum dvbfe_algo cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_CUSTOM;
- }
- static void cxd2820r_release(struct dvb_frontend *fe)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- dev_dbg(&client->dev, "\n");
- i2c_unregister_device(client);
- return;
- }
- static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
- {
- struct cxd2820r_priv *priv = fe->demodulator_priv;
- struct i2c_client *client = priv->client[0];
- dev_dbg_ratelimited(&client->dev, "enable=%d\n", enable);
- return regmap_update_bits(priv->regmap[0], 0x00db, 0x01, enable ? 1 : 0);
- }
- #ifdef CONFIG_GPIOLIB
- static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
- int val)
- {
- struct cxd2820r_priv *priv = gpiochip_get_data(chip);
- struct i2c_client *client = priv->client[0];
- u8 gpio[GPIO_COUNT];
- dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
- memcpy(gpio, priv->gpio, sizeof(gpio));
- gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
- return cxd2820r_gpio(&priv->fe, gpio);
- }
- static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
- {
- struct cxd2820r_priv *priv = gpiochip_get_data(chip);
- struct i2c_client *client = priv->client[0];
- u8 gpio[GPIO_COUNT];
- dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
- memcpy(gpio, priv->gpio, sizeof(gpio));
- gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
- (void) cxd2820r_gpio(&priv->fe, gpio);
- return;
- }
- static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
- {
- struct cxd2820r_priv *priv = gpiochip_get_data(chip);
- struct i2c_client *client = priv->client[0];
- dev_dbg(&client->dev, "nr=%u\n", nr);
- return (priv->gpio[nr] >> 2) & 0x01;
- }
- #endif
- static const struct dvb_frontend_ops cxd2820r_ops = {
- .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
- /* default: DVB-T/T2 */
- .info = {
- .name = "Sony CXD2820R",
- .caps = FE_CAN_FEC_1_2 |
- FE_CAN_FEC_2_3 |
- FE_CAN_FEC_3_4 |
- FE_CAN_FEC_5_6 |
- FE_CAN_FEC_7_8 |
- FE_CAN_FEC_AUTO |
- FE_CAN_QPSK |
- FE_CAN_QAM_16 |
- FE_CAN_QAM_32 |
- FE_CAN_QAM_64 |
- FE_CAN_QAM_128 |
- FE_CAN_QAM_256 |
- FE_CAN_QAM_AUTO |
- FE_CAN_TRANSMISSION_MODE_AUTO |
- FE_CAN_GUARD_INTERVAL_AUTO |
- FE_CAN_HIERARCHY_AUTO |
- FE_CAN_MUTE_TS |
- FE_CAN_2G_MODULATION |
- FE_CAN_MULTISTREAM
- },
- .release = cxd2820r_release,
- .init = cxd2820r_init,
- .sleep = cxd2820r_sleep,
- .get_tune_settings = cxd2820r_get_tune_settings,
- .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl,
- .get_frontend = cxd2820r_get_frontend,
- .get_frontend_algo = cxd2820r_get_frontend_algo,
- .search = cxd2820r_search,
- .read_status = cxd2820r_read_status,
- .read_snr = cxd2820r_read_snr,
- .read_ber = cxd2820r_read_ber,
- .read_ucblocks = cxd2820r_read_ucblocks,
- .read_signal_strength = cxd2820r_read_signal_strength,
- };
- /*
- * XXX: That is wrapper to cxd2820r_probe() via driver core in order to provide
- * proper I2C client for legacy media attach binding.
- * New users must use I2C client binding directly!
- */
- struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *config,
- struct i2c_adapter *adapter,
- int *gpio_chip_base)
- {
- struct i2c_client *client;
- struct i2c_board_info board_info;
- struct cxd2820r_platform_data pdata;
- pdata.ts_mode = config->ts_mode;
- pdata.ts_clk_inv = config->ts_clock_inv;
- pdata.if_agc_polarity = config->if_agc_polarity;
- pdata.spec_inv = config->spec_inv;
- pdata.gpio_chip_base = &gpio_chip_base;
- pdata.attach_in_use = true;
- memset(&board_info, 0, sizeof(board_info));
- strscpy(board_info.type, "cxd2820r", I2C_NAME_SIZE);
- board_info.addr = config->i2c_address;
- board_info.platform_data = &pdata;
- client = i2c_new_device(adapter, &board_info);
- if (!client || !client->dev.driver)
- return NULL;
- return pdata.get_dvb_frontend(client);
- }
- EXPORT_SYMBOL(cxd2820r_attach);
- static struct dvb_frontend *cxd2820r_get_dvb_frontend(struct i2c_client *client)
- {
- struct cxd2820r_priv *priv = i2c_get_clientdata(client);
- dev_dbg(&client->dev, "\n");
- return &priv->fe;
- }
- static int cxd2820r_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
- {
- struct cxd2820r_platform_data *pdata = client->dev.platform_data;
- struct cxd2820r_priv *priv;
- int ret, *gpio_chip_base;
- unsigned int utmp;
- static const struct regmap_range_cfg regmap_range_cfg0[] = {
- {
- .range_min = 0x0000,
- .range_max = 0x3fff,
- .selector_reg = 0x00,
- .selector_mask = 0xff,
- .selector_shift = 0,
- .window_start = 0x00,
- .window_len = 0x100,
- },
- };
- static const struct regmap_range_cfg regmap_range_cfg1[] = {
- {
- .range_min = 0x0000,
- .range_max = 0x01ff,
- .selector_reg = 0x00,
- .selector_mask = 0xff,
- .selector_shift = 0,
- .window_start = 0x00,
- .window_len = 0x100,
- },
- };
- static const struct regmap_config regmap_config0 = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = 0x3fff,
- .ranges = regmap_range_cfg0,
- .num_ranges = ARRAY_SIZE(regmap_range_cfg0),
- .cache_type = REGCACHE_NONE,
- };
- static const struct regmap_config regmap_config1 = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = 0x01ff,
- .ranges = regmap_range_cfg1,
- .num_ranges = ARRAY_SIZE(regmap_range_cfg1),
- .cache_type = REGCACHE_NONE,
- };
- dev_dbg(&client->dev, "\n");
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- ret = -ENOMEM;
- goto err;
- }
- priv->client[0] = client;
- priv->fe.demodulator_priv = priv;
- priv->i2c = client->adapter;
- priv->ts_mode = pdata->ts_mode;
- priv->ts_clk_inv = pdata->ts_clk_inv;
- priv->if_agc_polarity = pdata->if_agc_polarity;
- priv->spec_inv = pdata->spec_inv;
- gpio_chip_base = *pdata->gpio_chip_base;
- priv->regmap[0] = regmap_init_i2c(priv->client[0], ®map_config0);
- if (IS_ERR(priv->regmap[0])) {
- ret = PTR_ERR(priv->regmap[0]);
- goto err_kfree;
- }
- /* Check demod answers with correct chip id */
- ret = regmap_read(priv->regmap[0], 0x00fd, &utmp);
- if (ret)
- goto err_regmap_0_regmap_exit;
- dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
- if (utmp != 0xe1) {
- ret = -ENODEV;
- goto err_regmap_0_regmap_exit;
- }
- /*
- * Chip has two I2C addresses for different register banks. We register
- * one dummy I2C client in in order to get own I2C client for each
- * register bank.
- */
- priv->client[1] = i2c_new_dummy_device(client->adapter, client->addr | (1 << 1));
- if (IS_ERR(priv->client[1])) {
- ret = PTR_ERR(priv->client[1]);
- dev_err(&client->dev, "I2C registration failed\n");
- goto err_regmap_0_regmap_exit;
- }
- priv->regmap[1] = regmap_init_i2c(priv->client[1], ®map_config1);
- if (IS_ERR(priv->regmap[1])) {
- ret = PTR_ERR(priv->regmap[1]);
- goto err_client_1_i2c_unregister_device;
- }
- if (gpio_chip_base) {
- #ifdef CONFIG_GPIOLIB
- /* Add GPIOs */
- priv->gpio_chip.label = KBUILD_MODNAME;
- priv->gpio_chip.parent = &client->dev;
- priv->gpio_chip.owner = THIS_MODULE;
- priv->gpio_chip.direction_output = cxd2820r_gpio_direction_output;
- priv->gpio_chip.set = cxd2820r_gpio_set;
- priv->gpio_chip.get = cxd2820r_gpio_get;
- priv->gpio_chip.base = -1; /* Dynamic allocation */
- priv->gpio_chip.ngpio = GPIO_COUNT;
- priv->gpio_chip.can_sleep = 1;
- ret = gpiochip_add_data(&priv->gpio_chip, priv);
- if (ret)
- goto err_regmap_1_regmap_exit;
- dev_dbg(&client->dev, "gpio_chip.base=%d\n",
- priv->gpio_chip.base);
- *gpio_chip_base = priv->gpio_chip.base;
- #else
- /*
- * Use static GPIO configuration if GPIOLIB is undefined.
- * This is fallback condition.
- */
- u8 gpio[GPIO_COUNT];
- gpio[0] = (*gpio_chip_base >> 0) & 0x07;
- gpio[1] = (*gpio_chip_base >> 3) & 0x07;
- gpio[2] = 0;
- ret = cxd2820r_gpio(&priv->fe, gpio);
- if (ret)
- goto err_regmap_1_regmap_exit;
- #endif
- }
- /* Create dvb frontend */
- memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(priv->fe.ops));
- if (!pdata->attach_in_use)
- priv->fe.ops.release = NULL;
- i2c_set_clientdata(client, priv);
- /* Setup callbacks */
- pdata->get_dvb_frontend = cxd2820r_get_dvb_frontend;
- dev_info(&client->dev, "Sony CXD2820R successfully identified\n");
- return 0;
- err_regmap_1_regmap_exit:
- regmap_exit(priv->regmap[1]);
- err_client_1_i2c_unregister_device:
- i2c_unregister_device(priv->client[1]);
- err_regmap_0_regmap_exit:
- regmap_exit(priv->regmap[0]);
- err_kfree:
- kfree(priv);
- err:
- dev_dbg(&client->dev, "failed=%d\n", ret);
- return ret;
- }
- static int cxd2820r_remove(struct i2c_client *client)
- {
- struct cxd2820r_priv *priv = i2c_get_clientdata(client);
- dev_dbg(&client->dev, "\n");
- #ifdef CONFIG_GPIOLIB
- if (priv->gpio_chip.label)
- gpiochip_remove(&priv->gpio_chip);
- #endif
- regmap_exit(priv->regmap[1]);
- i2c_unregister_device(priv->client[1]);
- regmap_exit(priv->regmap[0]);
- kfree(priv);
- return 0;
- }
- static const struct i2c_device_id cxd2820r_id_table[] = {
- {"cxd2820r", 0},
- {}
- };
- MODULE_DEVICE_TABLE(i2c, cxd2820r_id_table);
- static struct i2c_driver cxd2820r_driver = {
- .driver = {
- .name = "cxd2820r",
- .suppress_bind_attrs = true,
- },
- .probe = cxd2820r_probe,
- .remove = cxd2820r_remove,
- .id_table = cxd2820r_id_table,
- };
- module_i2c_driver(cxd2820r_driver);
- MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
- MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
- MODULE_LICENSE("GPL");
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