diff options
Diffstat (limited to 'drivers/media/tuners/si2157.c')
| -rw-r--r-- | drivers/media/tuners/si2157.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c new file mode 100644 index 000000000..dbcf73789 --- /dev/null +++ b/drivers/media/tuners/si2157.c @@ -0,0 +1,445 @@ +/* + * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner 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 "si2157_priv.h" + +static const struct dvb_tuner_ops si2157_ops; + +/* execute firmware command */ +static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd) +{ + struct si2157_dev *dev = i2c_get_clientdata(client); + int ret; + unsigned long timeout; + + mutex_lock(&dev->i2c_mutex); + + if (cmd->wlen) { + /* write cmd and args for firmware */ + ret = i2c_master_send(client, cmd->args, cmd->wlen); + if (ret < 0) { + goto err_mutex_unlock; + } else if (ret != cmd->wlen) { + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + } + + if (cmd->rlen) { + /* wait cmd execution terminate */ + #define TIMEOUT 80 + timeout = jiffies + msecs_to_jiffies(TIMEOUT); + while (!time_after(jiffies, timeout)) { + ret = i2c_master_recv(client, cmd->args, cmd->rlen); + if (ret < 0) { + goto err_mutex_unlock; + } else if (ret != cmd->rlen) { + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + + /* firmware ready? */ + if ((cmd->args[0] >> 7) & 0x01) + break; + } + + dev_dbg(&client->dev, "cmd execution took %d ms\n", + jiffies_to_msecs(jiffies) - + (jiffies_to_msecs(timeout) - TIMEOUT)); + + if (!((cmd->args[0] >> 7) & 0x01)) { + ret = -ETIMEDOUT; + goto err_mutex_unlock; + } + } + + mutex_unlock(&dev->i2c_mutex); + return 0; + +err_mutex_unlock: + mutex_unlock(&dev->i2c_mutex); + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int si2157_init(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + int ret, len, remaining; + struct si2157_cmd cmd; + const struct firmware *fw; + const char *fw_name; + unsigned int chip_id; + + dev_dbg(&client->dev, "\n"); + + if (dev->fw_loaded) + goto warm; + + /* power up */ + if (dev->chiptype == SI2157_CHIPTYPE_SI2146) { + memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9); + cmd.wlen = 9; + } else { + memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15); + cmd.wlen = 15; + } + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* query chip revision */ + memcpy(cmd.args, "\x02", 1); + cmd.wlen = 1; + cmd.rlen = 13; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 | + cmd.args[4] << 0; + + #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0) + #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0) + #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0) + #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0) + #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0) + + switch (chip_id) { + case SI2158_A20: + case SI2148_A20: + fw_name = SI2158_A20_FIRMWARE; + break; + case SI2157_A30: + case SI2147_A30: + case SI2146_A10: + fw_name = NULL; + break; + default: + dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n", + cmd.args[2], cmd.args[1], + cmd.args[3], cmd.args[4]); + ret = -EINVAL; + goto err; + } + + dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n", + cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]); + + if (fw_name == NULL) + goto skip_fw_download; + + /* request the firmware, this will block and timeout */ + ret = reject_firmware(&fw, fw_name, &client->dev); + if (ret) { + dev_err(&client->dev, "firmware file '%s' not found\n", + fw_name); + goto err; + } + + /* firmware should be n chunks of 17 bytes */ + if (fw->size % 17 != 0) { + dev_err(&client->dev, "firmware file '%s' is invalid\n", + fw_name); + ret = -EINVAL; + goto err_release_firmware; + } + + dev_info(&client->dev, "downloading firmware from file '%s'\n", + fw_name); + + for (remaining = fw->size; remaining > 0; remaining -= 17) { + len = fw->data[fw->size - remaining]; + memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len); + cmd.wlen = len; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) { + dev_err(&client->dev, "firmware download failed %d\n", + ret); + goto err_release_firmware; + } + } + + release_firmware(fw); + +skip_fw_download: + /* reboot the tuner with new firmware? */ + memcpy(cmd.args, "\x01\x01", 2); + cmd.wlen = 2; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* query firmware version */ + memcpy(cmd.args, "\x11", 1); + cmd.wlen = 1; + cmd.rlen = 10; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + dev_info(&client->dev, "firmware version: %c.%c.%d\n", + cmd.args[6], cmd.args[7], cmd.args[8]); + + dev->fw_loaded = true; + +warm: + dev->active = true; + return 0; + +err_release_firmware: + release_firmware(fw); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int si2157_sleep(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + int ret; + struct si2157_cmd cmd; + + dev_dbg(&client->dev, "\n"); + + dev->active = false; + + /* standby */ + memcpy(cmd.args, "\x16\x00", 2); + cmd.wlen = 2; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int si2157_set_params(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + struct si2157_cmd cmd; + u8 bandwidth, delivery_system; + u32 if_frequency = 5000000; + + dev_dbg(&client->dev, + "delivery_system=%d frequency=%u bandwidth_hz=%u\n", + c->delivery_system, c->frequency, c->bandwidth_hz); + + if (!dev->active) { + ret = -EAGAIN; + goto err; + } + + if (c->bandwidth_hz <= 6000000) + bandwidth = 0x06; + else if (c->bandwidth_hz <= 7000000) + bandwidth = 0x07; + else if (c->bandwidth_hz <= 8000000) + bandwidth = 0x08; + else + bandwidth = 0x0f; + + switch (c->delivery_system) { + case SYS_ATSC: + delivery_system = 0x00; + if_frequency = 3250000; + break; + case SYS_DVBC_ANNEX_B: + delivery_system = 0x10; + if_frequency = 4000000; + break; + case SYS_DVBT: + case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */ + delivery_system = 0x20; + break; + case SYS_DVBC_ANNEX_A: + delivery_system = 0x30; + break; + default: + ret = -EINVAL; + goto err; + } + + memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6); + cmd.args[4] = delivery_system | bandwidth; + if (dev->inversion) + cmd.args[5] = 0x01; + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + if (dev->chiptype == SI2157_CHIPTYPE_SI2146) + memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6); + else + memcpy(cmd.args, "\x14\x00\x02\x07\x01\x00", 6); + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* set if frequency if needed */ + if (if_frequency != dev->if_frequency) { + memcpy(cmd.args, "\x14\x00\x06\x07", 4); + cmd.args[4] = (if_frequency / 1000) & 0xff; + cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff; + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + dev->if_frequency = if_frequency; + } + + /* set frequency */ + memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8); + cmd.args[4] = (c->frequency >> 0) & 0xff; + cmd.args[5] = (c->frequency >> 8) & 0xff; + cmd.args[6] = (c->frequency >> 16) & 0xff; + cmd.args[7] = (c->frequency >> 24) & 0xff; + cmd.wlen = 8; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + + *frequency = dev->if_frequency; + return 0; +} + +static const struct dvb_tuner_ops si2157_ops = { + .info = { + .name = "Silicon Labs Si2146/2147/2148/2157/2158", + .frequency_min = 55000000, + .frequency_max = 862000000, + }, + + .init = si2157_init, + .sleep = si2157_sleep, + .set_params = si2157_set_params, + .get_if_frequency = si2157_get_if_frequency, +}; + +static int si2157_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct si2157_config *cfg = client->dev.platform_data; + struct dvb_frontend *fe = cfg->fe; + struct si2157_dev *dev; + struct si2157_cmd cmd; + int ret; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + ret = -ENOMEM; + dev_err(&client->dev, "kzalloc() failed\n"); + goto err; + } + + i2c_set_clientdata(client, dev); + dev->fe = cfg->fe; + dev->inversion = cfg->inversion; + dev->fw_loaded = false; + dev->chiptype = (u8)id->driver_data; + dev->if_frequency = 5000000; /* default value of property 0x0706 */ + mutex_init(&dev->i2c_mutex); + + /* check if the tuner is there */ + cmd.wlen = 0; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err_kfree; + + memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = client; + + dev_info(&client->dev, "Silicon Labs %s successfully attached\n", + dev->chiptype == SI2157_CHIPTYPE_SI2146 ? + "Si2146" : "Si2147/2148/2157/2158"); + + return 0; + +err_kfree: + kfree(dev); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int si2157_remove(struct i2c_client *client) +{ + struct si2157_dev *dev = i2c_get_clientdata(client); + struct dvb_frontend *fe = dev->fe; + + dev_dbg(&client->dev, "\n"); + + memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = NULL; + kfree(dev); + + return 0; +} + +static const struct i2c_device_id si2157_id_table[] = { + {"si2157", SI2157_CHIPTYPE_SI2157}, + {"si2146", SI2157_CHIPTYPE_SI2146}, + {} +}; +MODULE_DEVICE_TABLE(i2c, si2157_id_table); + +static struct i2c_driver si2157_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "si2157", + }, + .probe = si2157_probe, + .remove = si2157_remove, + .id_table = si2157_id_table, +}; + +module_i2c_driver(si2157_driver); + +MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); +/*(DEBLOBBED)*/ |