diff options
Diffstat (limited to 'drivers/media/tuners/si2157.c')
| -rw-r--r-- | drivers/media/tuners/si2157.c | 419 |
1 files changed, 402 insertions, 17 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c index 898e0f9f8b70..fefb2625f655 100644 --- a/drivers/media/tuners/si2157.c +++ b/drivers/media/tuners/si2157.c @@ -9,6 +9,10 @@ static const struct dvb_tuner_ops si2157_ops; +static int tuner_lock_debug; +module_param(tuner_lock_debug, int, 0644); +MODULE_PARM_DESC(tuner_lock_debug, "if set, signal lock is briefly waited on after setting params"); + /* execute firmware command */ static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd) { @@ -47,14 +51,20 @@ static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd) break; } - dev_dbg(&client->dev, "cmd execution took %d ms\n", - jiffies_to_msecs(jiffies) - - (jiffies_to_msecs(timeout) - TIMEOUT)); + dev_dbg(&client->dev, "cmd execution took %d ms, status=%x\n", + jiffies_to_msecs(jiffies) - + (jiffies_to_msecs(timeout) - TIMEOUT), + cmd->args[0]); if (!((cmd->args[0] >> 7) & 0x01)) { ret = -ETIMEDOUT; goto err_mutex_unlock; } + /* check error status bit */ + if (cmd->args[0] & 0x40) { + ret = -EAGAIN; + goto err_mutex_unlock; + } } mutex_unlock(&dev->i2c_mutex); @@ -75,24 +85,23 @@ static int si2157_init(struct dvb_frontend *fe) struct si2157_cmd cmd; const struct firmware *fw; const char *fw_name; - unsigned int uitmp, chip_id; + unsigned int chip_id, xtal_trim; dev_dbg(&client->dev, "\n"); - /* Returned IF frequency is garbage when firmware is not running */ - memcpy(cmd.args, "\x15\x00\x06\x07", 4); + /* Try to get Xtal trim property, to verify tuner still running */ + memcpy(cmd.args, "\x15\x00\x04\x02", 4); cmd.wlen = 4; cmd.rlen = 4; ret = si2157_cmd_execute(client, &cmd); - if (ret) - goto err; - uitmp = cmd.args[2] << 0 | cmd.args[3] << 8; - dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp); + xtal_trim = cmd.args[2] | (cmd.args[3] << 8); - if (uitmp == dev->if_frequency / 1000) + if (ret == 0 && xtal_trim < 16) goto warm; + dev->if_frequency = 0; /* we no longer know current tuner state */ + /* power up */ if (dev->chiptype == SI2157_CHIPTYPE_SI2146) { memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9); @@ -106,7 +115,7 @@ static int si2157_init(struct dvb_frontend *fe) } cmd.rlen = 1; ret = si2157_cmd_execute(client, &cmd); - if (ret) + if (ret && (dev->chiptype != SI2157_CHIPTYPE_SI2141 || ret != -EAGAIN)) goto err; /* Si2141 needs a second command before it answers the revision query */ @@ -230,6 +239,28 @@ skip_fw_download: dev_info(&client->dev, "firmware version: %c.%c.%d\n", cmd.args[6], cmd.args[7], cmd.args[8]); + + /* enable tuner status flags */ + memcpy(cmd.args, "\x14\x00\x01\x05\x01\x00", 6); + cmd.wlen = 6; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + memcpy(cmd.args, "\x14\x00\x01\x06\x01\x00", 6); + cmd.wlen = 6; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + memcpy(cmd.args, "\x14\x00\x01\x07\x01\x00", 6); + cmd.wlen = 6; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; warm: /* init statistics in order signal app which are supported */ c->strength.len = 1; @@ -274,6 +305,93 @@ err: return ret; } +static int si2157_tune_wait(struct i2c_client *client, u8 is_digital) +{ +#define TUN_TIMEOUT 40 +#define DIG_TIMEOUT 30 +#define ANALOG_TIMEOUT 150 + struct si2157_dev *dev = i2c_get_clientdata(client); + int ret; + unsigned long timeout; + unsigned long start_time; + u8 wait_status; + u8 tune_lock_mask; + + if (is_digital) + tune_lock_mask = 0x04; + else + tune_lock_mask = 0x02; + + mutex_lock(&dev->i2c_mutex); + + /* wait tuner command complete */ + start_time = jiffies; + timeout = start_time + msecs_to_jiffies(TUN_TIMEOUT); + while (1) { + ret = i2c_master_recv(client, &wait_status, + sizeof(wait_status)); + if (ret < 0) { + goto err_mutex_unlock; + } else if (ret != sizeof(wait_status)) { + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + + if (time_after(jiffies, timeout)) + break; + + /* tuner done? */ + if ((wait_status & 0x81) == 0x81) + break; + usleep_range(5000, 10000); + } + + dev_dbg(&client->dev, "tuning took %d ms, status=0x%x\n", + jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time), + wait_status); + + /* if we tuned ok, wait a bit for tuner lock */ + if (tuner_lock_debug && (wait_status & 0x81) == 0x81) { + if (is_digital) + timeout = jiffies + msecs_to_jiffies(DIG_TIMEOUT); + else + timeout = jiffies + msecs_to_jiffies(ANALOG_TIMEOUT); + + while (!time_after(jiffies, timeout)) { + ret = i2c_master_recv(client, &wait_status, + sizeof(wait_status)); + if (ret < 0) { + goto err_mutex_unlock; + } else if (ret != sizeof(wait_status)) { + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + + /* tuner locked? */ + if (wait_status & tune_lock_mask) + break; + usleep_range(5000, 10000); + } + + dev_dbg(&client->dev, "tuning+lock took %d ms, status=0x%x\n", + jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time), + wait_status); + } + + if ((wait_status & 0xc0) != 0x80) { + ret = -ETIMEDOUT; + goto err_mutex_unlock; + } + + mutex_unlock(&dev->i2c_mutex); + return 0; + +err_mutex_unlock: + mutex_unlock(&dev->i2c_mutex); + dev_err(&client->dev, "failed=%d\n", ret); + return ret; +} + static int si2157_set_params(struct dvb_frontend *fe) { struct i2c_client *client = fe->tuner_priv; @@ -344,7 +462,7 @@ static int si2157_set_params(struct dvb_frontend *fe) if (ret) goto err; - /* set if frequency if needed */ + /* set digital 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; @@ -358,7 +476,7 @@ static int si2157_set_params(struct dvb_frontend *fe) dev->if_frequency = if_frequency; } - /* set frequency */ + /* set digital 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; @@ -370,21 +488,283 @@ static int si2157_set_params(struct dvb_frontend *fe) if (ret) goto err; + dev->bandwidth = bandwidth; + dev->frequency = c->frequency; + + si2157_tune_wait(client, 1); /* wait to complete, ignore any errors */ + return 0; err: + dev->bandwidth = 0; + dev->frequency = 0; + dev->if_frequency = 0; dev_dbg(&client->dev, "failed=%d\n", ret); return ret; } +static int si2157_set_analog_params(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + char *std; /* for debugging */ + int ret; + struct si2157_cmd cmd; + u32 bandwidth = 0; + u32 if_frequency = 0; + u32 freq = 0; + u64 tmp_lval = 0; + u8 system = 0; + u8 color = 0; /* 0=NTSC/PAL, 0x10=SECAM */ + u8 invert_analog = 1; /* analog tuner spectrum; 0=normal, 1=inverted */ + + if (dev->chiptype != SI2157_CHIPTYPE_SI2157) { + dev_info(&client->dev, "Analog tuning not supported for chiptype=%u\n", + dev->chiptype); + ret = -EINVAL; + goto err; + } + + if (!dev->active) + si2157_init(fe); + + if (!dev->active) { + ret = -EAGAIN; + goto err; + } + if (params->mode == V4L2_TUNER_RADIO) { + /* + * std = "fm"; + * bandwidth = 1700000; //best can do for FM, AGC will be a mess though + * if_frequency = 1250000; //HVR-225x(saa7164), HVR-12xx(cx23885) + * if_frequency = 6600000; //HVR-9xx(cx231xx) + * if_frequency = 5500000; //HVR-19xx(pvrusb2) + */ + dev_err(&client->dev, "si2157 does not currently support FM radio\n"); + ret = -EINVAL; + goto err; + } + tmp_lval = params->frequency * 625LL; + do_div(tmp_lval, 10); /* convert to HZ */ + freq = (u32)tmp_lval; + + if (freq < 1000000) /* is freq in KHz */ + freq = freq * 1000; + dev->frequency = freq; + + /* if_frequency values based on tda187271C2 */ + if (params->std & (V4L2_STD_B | V4L2_STD_GH)) { + if (freq >= 470000000) { + std = "palGH"; + bandwidth = 8000000; + if_frequency = 6000000; + system = 1; + if (params->std & + (V4L2_STD_SECAM_G | V4L2_STD_SECAM_H)) { + std = "secamGH"; + color = 0x10; + } + } else { + std = "palB"; + bandwidth = 7000000; + if_frequency = 6000000; + system = 0; + if (params->std & V4L2_STD_SECAM_B) { + std = "secamB"; + color = 0x10; + } + } + } else if (params->std & V4L2_STD_MN) { + std = "MN"; + bandwidth = 6000000; + if_frequency = 5400000; + system = 2; + } else if (params->std & V4L2_STD_PAL_I) { + std = "palI"; + bandwidth = 8000000; + if_frequency = 7250000; /* TODO: does not work yet */ + system = 4; + } else if (params->std & V4L2_STD_DK) { + std = "palDK"; + bandwidth = 8000000; + if_frequency = 6900000; /* TODO: does not work yet */ + system = 5; + if (params->std & V4L2_STD_SECAM_DK) { + std = "secamDK"; + color = 0x10; + } + } else if (params->std & V4L2_STD_SECAM_L) { + std = "secamL"; + bandwidth = 8000000; + if_frequency = 6750000; /* TODO: untested */ + system = 6; + color = 0x10; + } else if (params->std & V4L2_STD_SECAM_LC) { + std = "secamL'"; + bandwidth = 7000000; + if_frequency = 1250000; /* TODO: untested */ + system = 7; + color = 0x10; + } else { + std = "unknown"; + } + /* calc channel center freq */ + freq = freq - 1250000 + (bandwidth / 2); + + dev_dbg(&client->dev, + "mode=%d system=%u std='%s' params->frequency=%u center freq=%u if=%u bandwidth=%u\n", + params->mode, system, std, params->frequency, + freq, if_frequency, bandwidth); + + /* set analog IF port */ + memcpy(cmd.args, "\x14\x00\x03\x06\x08\x02", 6); + /* in using dev->if_port, we assume analog and digital IF's */ + /* are always on different ports */ + /* assumes if_port definition is 0 or 1 for digital out */ + cmd.args[4] = (dev->if_port == 1) ? 8 : 10; + /* Analog AGC assumed external */ + cmd.args[5] = (dev->if_port == 1) ? 2 : 1; + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* set analog IF output config */ + memcpy(cmd.args, "\x14\x00\x0d\x06\x94\x64", 6); + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* make this distinct from a digital IF */ + dev->if_frequency = if_frequency | 1; + + /* calc and set tuner analog if center frequency */ + if_frequency = if_frequency + 1250000 - (bandwidth / 2); + dev_dbg(&client->dev, "IF Ctr freq=%d\n", if_frequency); + + memcpy(cmd.args, "\x14\x00\x0C\x06", 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; + + /* set analog AGC config */ + memcpy(cmd.args, "\x14\x00\x07\x06\x32\xc8", 6); + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* set analog video mode */ + memcpy(cmd.args, "\x14\x00\x04\x06\x00\x00", 6); + cmd.args[4] = system | color; + /* can use dev->inversion if assumed applies to both digital/analog */ + if (invert_analog) + cmd.args[5] |= 0x02; + cmd.wlen = 6; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* set analog frequency */ + memcpy(cmd.args, "\x41\x01\x00\x00\x00\x00\x00\x00", 8); + cmd.args[4] = (freq >> 0) & 0xff; + cmd.args[5] = (freq >> 8) & 0xff; + cmd.args[6] = (freq >> 16) & 0xff; + cmd.args[7] = (freq >> 24) & 0xff; + cmd.wlen = 8; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + dev->bandwidth = bandwidth; + + si2157_tune_wait(client, 0); /* wait to complete, ignore any errors */ + + return 0; +err: + dev->bandwidth = 0; + dev->frequency = 0; + dev->if_frequency = 0; + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int si2157_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + + *frequency = dev->frequency; + dev_dbg(&client->dev, "freq=%u\n", dev->frequency); + return 0; +} + +static int si2157_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) +{ + struct i2c_client *client = fe->tuner_priv; + struct si2157_dev *dev = i2c_get_clientdata(client); + + *bandwidth = dev->bandwidth; + dev_dbg(&client->dev, "bandwidth=%u\n", dev->bandwidth); + return 0; +} + 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; + *frequency = dev->if_frequency & ~1; /* strip analog IF indicator bit */ + dev_dbg(&client->dev, "if_frequency=%u\n", *frequency); return 0; } +static int si2157_get_rf_strength(struct dvb_frontend *fe, u16 *rssi) +{ + struct i2c_client *client = fe->tuner_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct si2157_cmd cmd; + int ret; + int strength; + + dev_dbg(&client->dev, "\n"); + + memcpy(cmd.args, "\x42\x00", 2); + cmd.wlen = 2; + cmd.rlen = 12; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + c->strength.stat[0].scale = FE_SCALE_DECIBEL; + c->strength.stat[0].svalue = (s8)cmd.args[3] * 1000; + + /* normalize values based on Silicon Labs reference + * add 100, then anything > 80 is 100% signal + */ + strength = (s8)cmd.args[3] + 100; + strength = clamp_val(strength, 0, 80); + *rssi = (u16)(strength * 0xffff / 80); + + dev_dbg(&client->dev, "strength=%d rssi=%u\n", + (s8)cmd.args[3], *rssi); + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + static const struct dvb_tuner_ops si2157_ops = { .info = { .name = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158", @@ -395,7 +775,12 @@ static const struct dvb_tuner_ops si2157_ops = { .init = si2157_init, .sleep = si2157_sleep, .set_params = si2157_set_params, - .get_if_frequency = si2157_get_if_frequency, + .set_analog_params = si2157_set_analog_params, + .get_frequency = si2157_get_frequency, + .get_bandwidth = si2157_get_bandwidth, + .get_if_frequency = si2157_get_if_frequency, + + .get_rf_strength = si2157_get_rf_strength, }; static void si2157_stat_work(struct work_struct *work) @@ -456,7 +841,7 @@ static int si2157_probe(struct i2c_client *client, cmd.wlen = 0; cmd.rlen = 1; ret = si2157_cmd_execute(client, &cmd); - if (ret) + if (ret && ret != -EAGAIN) goto err_kfree; memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops)); |