diff options
Diffstat (limited to 'drivers/media/tuners/si2157.c')
| -rw-r--r-- | drivers/media/tuners/si2157.c | 940 |
1 files changed, 940 insertions, 0 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c new file mode 100644 index 000000000..75ddf7ed1 --- /dev/null +++ b/drivers/media/tuners/si2157.c @@ -0,0 +1,940 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver + * + * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> + */ + +#include "si2157_priv.h" + +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) +{ + 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, 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); + 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); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, len, remaining; + struct si2157_cmd cmd; + const struct firmware *fw; + const char *fw_name; + unsigned int chip_id, xtal_trim; + + dev_dbg(&client->dev, "\n"); + + /* Try to get Xtal trim property, to verify tuner still running */ + memcpy(cmd.args, "\x15\x00\x02\x04", 4); + cmd.wlen = 4; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + + xtal_trim = cmd.args[2] | (cmd.args[3] << 8); + + 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); + cmd.wlen = 9; + } else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) { + memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10); + cmd.wlen = 10; + } 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 && (dev->chiptype != SI2157_CHIPTYPE_SI2141 || ret != -EAGAIN)) + goto err; + + /* Si2141 needs a second command before it answers the revision query */ + if (dev->chiptype == SI2157_CHIPTYPE_SI2141) { + memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7); + cmd.wlen = 7; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + } + + if (dev->dont_load_firmware) { + dev_info(&client->dev, "device is buggy, skipping firmware download\n"); + goto skip_fw_download; + } + + /* 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 SI2177_A30 ('A' << 24 | 77 << 16 | '3' << 8 | '0' << 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) + #define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0) + + switch (chip_id) { + case SI2158_A20: + case SI2148_A20: + fw_name = SI2158_A20_FIRMWARE; + break; + case SI2141_A10: + fw_name = SI2141_A10_FIRMWARE; + break; + case SI2177_A30: + fw_name = SI2157_A30_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 = request_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]; + if (len > SI2157_ARGLEN) { + dev_err(&client->dev, "Bad firmware length\n"); + ret = -EINVAL; + goto err_release_firmware; + } + 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]); + + /* 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; + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + /* start statistics polling */ + schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000)); + + 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; + + /* stop statistics polling */ + cancel_delayed_work_sync(&dev->stat_work); + + /* 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_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; + 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\x00\x00", 6); + cmd.args[4] = dev->if_port; + cmd.wlen = 6; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* 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; + 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 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; + 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; + + 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 & ~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", + .frequency_min_hz = 42 * MHz, + .frequency_max_hz = 870 * MHz, + }, + + .init = si2157_init, + .sleep = si2157_sleep, + .set_params = si2157_set_params, + .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) +{ + struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work); + struct dvb_frontend *fe = dev->fe; + struct i2c_client *client = fe->tuner_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct si2157_cmd cmd; + int ret; + + 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; + + schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); + return; +err: + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + dev_dbg(&client->dev, "failed=%d\n", ret); +} + +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->dont_load_firmware = cfg->dont_load_firmware; + dev->if_port = cfg->if_port; + dev->chiptype = (u8)id->driver_data; + dev->if_frequency = 5000000; /* default value of property 0x0706 */ + mutex_init(&dev->i2c_mutex); + INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work); + + /* check if the tuner is there */ + cmd.wlen = 0; + cmd.rlen = 1; + ret = si2157_cmd_execute(client, &cmd); + if (ret && ret != -EAGAIN) + goto err_kfree; + + memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = client; + +#ifdef CONFIG_MEDIA_CONTROLLER + if (cfg->mdev) { + dev->mdev = cfg->mdev; + + dev->ent.name = KBUILD_MODNAME; + dev->ent.function = MEDIA_ENT_F_TUNER; + + dev->pad[SI2157_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK; + dev->pad[SI2157_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG; + dev->pad[SI2157_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE; + dev->pad[SI2157_PAD_VID_OUT].sig_type = PAD_SIGNAL_ANALOG; + dev->pad[SI2157_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE; + dev->pad[SI2157_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO; + + ret = media_entity_pads_init(&dev->ent, SI2157_NUM_PADS, + &dev->pad[0]); + + if (ret) + goto err_kfree; + + ret = media_device_register_entity(cfg->mdev, &dev->ent); + if (ret) { + media_entity_cleanup(&dev->ent); + goto err_kfree; + } + } +#endif + + dev_info(&client->dev, "Silicon Labs %s successfully attached\n", + dev->chiptype == SI2157_CHIPTYPE_SI2141 ? "Si2141" : + 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"); + + /* stop statistics polling */ + cancel_delayed_work_sync(&dev->stat_work); + +#ifdef CONFIG_MEDIA_CONTROLLER_DVB + if (dev->mdev) + media_device_unregister_entity(&dev->ent); +#endif + + 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}, + {"si2141", SI2157_CHIPTYPE_SI2141}, + {"si2177", SI2157_CHIPTYPE_SI2177}, + {} +}; +MODULE_DEVICE_TABLE(i2c, si2157_id_table); + +static struct i2c_driver si2157_driver = { + .driver = { + .name = "si2157", + .suppress_bind_attrs = true, + }, + .probe = si2157_probe, + .remove = si2157_remove, + .id_table = si2157_id_table, +}; + +module_i2c_driver(si2157_driver); + +MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE(SI2158_A20_FIRMWARE); +MODULE_FIRMWARE(SI2141_A10_FIRMWARE); +MODULE_FIRMWARE(SI2157_A30_FIRMWARE); |