UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity
OpenCloudOS-Kernel/drivers/media/tuners/si2157.c

941 lines
23 KiB
C
Raw Blame History

// 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\x04\x02", 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);
Reference in New Issue View Git Blame Copy Permalink