diff options
Diffstat (limited to 'drivers/media/dvb-frontends/mn88473.c')
| -rw-r--r-- | drivers/media/dvb-frontends/mn88473.c | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/mn88473.c b/drivers/media/dvb-frontends/mn88473.c new file mode 100644 index 000000000000..6c5d592161d4 --- /dev/null +++ b/drivers/media/dvb-frontends/mn88473.c @@ -0,0 +1,606 @@ +/* + * Panasonic MN88473 DVB-T/T2/C demodulator driver + * + * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "mn88473_priv.h" + +static int mn88473_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *s) +{ + s->min_delay_ms = 1000; + return 0; +} + +static int mn88473_set_frontend(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct mn88473_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, i; + unsigned int uitmp; + u32 if_frequency; + u8 delivery_system_val, if_val[3], *conf_val_ptr; + u8 reg_bank2_2d_val, reg_bank0_d2_val; + + dev_dbg(&client->dev, + "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n", + c->delivery_system, c->modulation, c->frequency, + c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id); + + if (!dev->active) { + ret = -EAGAIN; + goto err; + } + + switch (c->delivery_system) { + case SYS_DVBT: + delivery_system_val = 0x02; + reg_bank2_2d_val = 0x23; + reg_bank0_d2_val = 0x2a; + break; + case SYS_DVBT2: + delivery_system_val = 0x03; + reg_bank2_2d_val = 0x3b; + reg_bank0_d2_val = 0x29; + break; + case SYS_DVBC_ANNEX_A: + delivery_system_val = 0x04; + reg_bank2_2d_val = 0x3b; + reg_bank0_d2_val = 0x29; + break; + default: + ret = -EINVAL; + goto err; + } + + switch (c->delivery_system) { + case SYS_DVBT: + case SYS_DVBT2: + switch (c->bandwidth_hz) { + case 6000000: + conf_val_ptr = "\xe9\x55\x55\x1c\x29\x1c\x29"; + break; + case 7000000: + conf_val_ptr = "\xc8\x00\x00\x17\x0a\x17\x0a"; + break; + case 8000000: + conf_val_ptr = "\xaf\x00\x00\x11\xec\x11\xec"; + break; + default: + ret = -EINVAL; + goto err; + } + break; + case SYS_DVBC_ANNEX_A: + conf_val_ptr = "\x10\xab\x0d\xae\x1d\x9d"; + break; + default: + break; + } + + /* Program tuner */ + if (fe->ops.tuner_ops.set_params) { + ret = fe->ops.tuner_ops.set_params(fe); + if (ret) + goto err; + } + + if (fe->ops.tuner_ops.get_if_frequency) { + ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); + if (ret) + goto err; + + dev_dbg(&client->dev, "get_if_frequency=%u\n", if_frequency); + } else { + ret = -EINVAL; + goto err; + } + + /* Calculate IF registers */ + uitmp = DIV_ROUND_CLOSEST_ULL((u64) if_frequency * 0x1000000, dev->clk); + if_val[0] = (uitmp >> 16) & 0xff; + if_val[1] = (uitmp >> 8) & 0xff; + if_val[2] = (uitmp >> 0) & 0xff; + + ret = regmap_write(dev->regmap[2], 0x05, 0x00); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0xfb, 0x13); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0xef, 0x13); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0xf9, 0x13); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x00, 0x18); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x01, 0x01); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x02, 0x21); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x0b, 0x00); + if (ret) + goto err; + + for (i = 0; i < sizeof(if_val); i++) { + ret = regmap_write(dev->regmap[2], 0x10 + i, if_val[i]); + if (ret) + goto err; + } + + switch (c->delivery_system) { + case SYS_DVBT: + case SYS_DVBT2: + for (i = 0; i < 7; i++) { + ret = regmap_write(dev->regmap[2], 0x13 + i, + conf_val_ptr[i]); + if (ret) + goto err; + } + break; + case SYS_DVBC_ANNEX_A: + ret = regmap_bulk_write(dev->regmap[1], 0x10, conf_val_ptr, 6); + if (ret) + goto err; + break; + default: + break; + } + + ret = regmap_write(dev->regmap[2], 0x2d, reg_bank2_2d_val); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x2e, 0x00); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x56, 0x0d); + if (ret) + goto err; + ret = regmap_bulk_write(dev->regmap[0], 0x01, + "\xba\x13\x80\xba\x91\xdd\xe7\x28", 8); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x0a, 0x1a); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x13, 0x1f); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x19, 0x03); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x1d, 0xb0); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x2a, 0x72); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x2d, 0x00); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x3c, 0x00); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0x3f, 0xf8); + if (ret) + goto err; + ret = regmap_bulk_write(dev->regmap[0], 0x40, "\xf4\x08", 2); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0xd2, reg_bank0_d2_val); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0xd4, 0x55); + if (ret) + goto err; + ret = regmap_write(dev->regmap[1], 0xbe, 0x08); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0xb2, 0x37); + if (ret) + goto err; + ret = regmap_write(dev->regmap[0], 0xd7, 0x04); + if (ret) + goto err; + + /* Reset FSM */ + ret = regmap_write(dev->regmap[2], 0xf8, 0x9f); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status) +{ + struct i2c_client *client = fe->demodulator_priv; + struct mn88473_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + unsigned int uitmp; + + if (!dev->active) { + ret = -EAGAIN; + goto err; + } + + *status = 0; + + switch (c->delivery_system) { + case SYS_DVBT: + ret = regmap_read(dev->regmap[0], 0x62, &uitmp); + if (ret) + goto err; + + if (!(uitmp & 0xa0)) { + if ((uitmp & 0x0f) >= 0x09) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | + FE_HAS_LOCK; + else if ((uitmp & 0x0f) >= 0x03) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; + } + break; + case SYS_DVBT2: + ret = regmap_read(dev->regmap[2], 0x8b, &uitmp); + if (ret) + goto err; + + if (!(uitmp & 0x40)) { + if ((uitmp & 0x0f) >= 0x0d) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | + FE_HAS_LOCK; + else if ((uitmp & 0x0f) >= 0x0a) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI; + else if ((uitmp & 0x0f) >= 0x07) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; + } + break; + case SYS_DVBC_ANNEX_A: + ret = regmap_read(dev->regmap[1], 0x85, &uitmp); + if (ret) + goto err; + + if (!(uitmp & 0x40)) { + ret = regmap_read(dev->regmap[1], 0x89, &uitmp); + if (ret) + goto err; + + if (uitmp & 0x01) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | + FE_HAS_LOCK; + } + break; + default: + ret = -EINVAL; + goto err; + } + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int mn88473_init(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct mn88473_dev *dev = i2c_get_clientdata(client); + int ret, len, remain; + unsigned int uitmp; + const struct firmware *fw; + const char *name = MN88473_FIRMWARE; + + dev_dbg(&client->dev, "\n"); + + /* Check if firmware is already running */ + ret = regmap_read(dev->regmap[0], 0xf5, &uitmp); + if (ret) + goto err; + + if (!(uitmp & 0x01)) + goto warm; + + /* Request the firmware, this will block and timeout */ + ret = request_firmware(&fw, name, &client->dev); + if (ret) { + dev_err(&client->dev, "firmare file '%s' not found\n", name); + goto err; + } + + dev_info(&client->dev, "downloading firmware from file '%s'\n", name); + + ret = regmap_write(dev->regmap[0], 0xf5, 0x03); + if (ret) + goto err_release_firmware; + + for (remain = fw->size; remain > 0; remain -= (dev->i2c_wr_max - 1)) { + len = min(dev->i2c_wr_max - 1, remain); + ret = regmap_bulk_write(dev->regmap[0], 0xf6, + &fw->data[fw->size - remain], len); + if (ret) { + dev_err(&client->dev, "firmware download failed %d\n", + ret); + goto err_release_firmware; + } + } + + release_firmware(fw); + + /* Parity check of firmware */ + ret = regmap_read(dev->regmap[0], 0xf8, &uitmp); + if (ret) + goto err; + + if (uitmp & 0x10) { + dev_err(&client->dev, "firmware parity check failed\n"); + ret = -EINVAL; + goto err; + } + + ret = regmap_write(dev->regmap[0], 0xf5, 0x00); + if (ret) + goto err; +warm: + /* TS config */ + ret = regmap_write(dev->regmap[2], 0x09, 0x08); + if (ret) + goto err; + ret = regmap_write(dev->regmap[2], 0x08, 0x1d); + if (ret) + goto err; + + dev->active = true; + + return 0; +err_release_firmware: + release_firmware(fw); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int mn88473_sleep(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct mn88473_dev *dev = i2c_get_clientdata(client); + int ret; + + dev_dbg(&client->dev, "\n"); + + dev->active = false; + + ret = regmap_write(dev->regmap[2], 0x05, 0x3e); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static const struct dvb_frontend_ops mn88473_ops = { + .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A}, + .info = { + .name = "Panasonic MN88473", + .symbol_rate_min = 1000000, + .symbol_rate_max = 7200000, + .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 + }, + + .get_tune_settings = mn88473_get_tune_settings, + + .init = mn88473_init, + .sleep = mn88473_sleep, + + .set_frontend = mn88473_set_frontend, + + .read_status = mn88473_read_status, +}; + +static int mn88473_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mn88473_config *config = client->dev.platform_data; + struct mn88473_dev *dev; + int ret; + unsigned int uitmp; + static const struct regmap_config regmap_config = { + .reg_bits = 8, + .val_bits = 8, + }; + + dev_dbg(&client->dev, "\n"); + + /* Caller really need to provide pointer for frontend we create */ + if (config->fe == NULL) { + dev_err(&client->dev, "frontend pointer not defined\n"); + ret = -EINVAL; + goto err; + } + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) { + ret = -ENOMEM; + goto err; + } + + if (config->i2c_wr_max) + dev->i2c_wr_max = config->i2c_wr_max; + else + dev->i2c_wr_max = ~0; + + if (config->xtal) + dev->clk = config->xtal; + else + dev->clk = 25000000; + dev->client[0] = client; + dev->regmap[0] = regmap_init_i2c(dev->client[0], ®map_config); + if (IS_ERR(dev->regmap[0])) { + ret = PTR_ERR(dev->regmap[0]); + goto err_kfree; + } + + /* Check demod answers with correct chip id */ + ret = regmap_read(dev->regmap[0], 0xff, &uitmp); + if (ret) + goto err_regmap_0_regmap_exit; + + dev_dbg(&client->dev, "chip id=%02x\n", uitmp); + + if (uitmp != 0x03) { + ret = -ENODEV; + goto err_regmap_0_regmap_exit; + } + + /* + * Chip has three I2C addresses for different register banks. Used + * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients, + * 0x1a and 0x1c, in order to get own I2C client for each register bank. + * + * Also, register bank 2 do not support sequential I/O. Only single + * register write or read is allowed to that bank. + */ + dev->client[1] = i2c_new_dummy(client->adapter, 0x1a); + if (dev->client[1] == NULL) { + ret = -ENODEV; + dev_err(&client->dev, "I2C registration failed\n"); + if (ret) + goto err_regmap_0_regmap_exit; + } + dev->regmap[1] = regmap_init_i2c(dev->client[1], ®map_config); + if (IS_ERR(dev->regmap[1])) { + ret = PTR_ERR(dev->regmap[1]); + goto err_client_1_i2c_unregister_device; + } + i2c_set_clientdata(dev->client[1], dev); + + dev->client[2] = i2c_new_dummy(client->adapter, 0x1c); + if (dev->client[2] == NULL) { + ret = -ENODEV; + dev_err(&client->dev, "2nd I2C registration failed\n"); + if (ret) + goto err_regmap_1_regmap_exit; + } + dev->regmap[2] = regmap_init_i2c(dev->client[2], ®map_config); + if (IS_ERR(dev->regmap[2])) { + ret = PTR_ERR(dev->regmap[2]); + goto err_client_2_i2c_unregister_device; + } + i2c_set_clientdata(dev->client[2], dev); + + /* Sleep because chip is active by default */ + ret = regmap_write(dev->regmap[2], 0x05, 0x3e); + if (ret) + goto err_client_2_i2c_unregister_device; + + /* Create dvb frontend */ + memcpy(&dev->frontend.ops, &mn88473_ops, sizeof(dev->frontend.ops)); + dev->frontend.demodulator_priv = client; + *config->fe = &dev->frontend; + i2c_set_clientdata(client, dev); + + dev_info(&client->dev, "Panasonic MN88473 successfully identified\n"); + + return 0; + +err_client_2_i2c_unregister_device: + i2c_unregister_device(dev->client[2]); +err_regmap_1_regmap_exit: + regmap_exit(dev->regmap[1]); +err_client_1_i2c_unregister_device: + i2c_unregister_device(dev->client[1]); +err_regmap_0_regmap_exit: + regmap_exit(dev->regmap[0]); +err_kfree: + kfree(dev); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int mn88473_remove(struct i2c_client *client) +{ + struct mn88473_dev *dev = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + regmap_exit(dev->regmap[2]); + i2c_unregister_device(dev->client[2]); + + regmap_exit(dev->regmap[1]); + i2c_unregister_device(dev->client[1]); + + regmap_exit(dev->regmap[0]); + + kfree(dev); + + return 0; +} + +static const struct i2c_device_id mn88473_id_table[] = { + {"mn88473", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, mn88473_id_table); + +static struct i2c_driver mn88473_driver = { + .driver = { + .name = "mn88473", + .suppress_bind_attrs = true, + }, + .probe = mn88473_probe, + .remove = mn88473_remove, + .id_table = mn88473_id_table, +}; + +module_i2c_driver(mn88473_driver); + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver"); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE(MN88473_FIRMWARE); |