diff options
Diffstat (limited to 'drivers/media/dvb-frontends/cxd2820r_core.c')
| -rw-r--r-- | drivers/media/dvb-frontends/cxd2820r_core.c | 748 |
1 files changed, 748 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_core.c b/drivers/media/dvb-frontends/cxd2820r_core.c new file mode 100644 index 000000000..b0e6343ea --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2820r_core.c @@ -0,0 +1,748 @@ +// 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_client_device(adapter, &board_info); + if (!i2c_client_has_driver(client)) + return NULL; + + return pdata.get_dvb_frontend(client); +} +EXPORT_SYMBOL_GPL(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"); |