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linux-next/drivers/media/dvb-frontends/si2168.c
Antti Palosaari 722a042de7 [media] si2168: relax demod lock checks a little 
bit3 was not cleared always leaving driver reporting demod is not
fully locked. Do not check bit0 as it seems to be always 0.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-04-23 09:54:26 -03:00

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/*
* Silicon Labs Si2168 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 "si2168_priv.h"
static const struct dvb_frontend_ops si2168_ops;
/* execute firmware command */
static int si2168_cmd_execute(struct si2168 *s, struct si2168_cmd *cmd)
{
int ret;
unsigned long timeout;
mutex_lock(&s->i2c_mutex);
if (cmd->wlen) {
/* write cmd and args for firmware */
ret = i2c_master_send(s->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 50
timeout = jiffies + msecs_to_jiffies(TIMEOUT);
while (!time_after(jiffies, timeout)) {
ret = i2c_master_recv(s->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(&s->client->dev, "%s: cmd execution took %d ms\n",
__func__,
jiffies_to_msecs(jiffies) -
(jiffies_to_msecs(timeout) - TIMEOUT));
if (!(cmd->args[0] >> 7) & 0x01) {
ret = -ETIMEDOUT;
goto err_mutex_unlock;
}
}
ret = 0;
err_mutex_unlock:
mutex_unlock(&s->i2c_mutex);
if (ret)
goto err;
return 0;
err:
dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct si2168 *s = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
struct si2168_cmd cmd;
*status = 0;
if (!s->active) {
ret = -EAGAIN;
goto err;
}
switch (c->delivery_system) {
case SYS_DVBT:
cmd.args[0] = 0xa0;
cmd.args[1] = 0x01;
cmd.wlen = 2;
cmd.rlen = 13;
break;
case SYS_DVBC_ANNEX_A:
cmd.args[0] = 0x90;
cmd.args[1] = 0x01;
cmd.wlen = 2;
cmd.rlen = 9;
break;
case SYS_DVBT2:
cmd.args[0] = 0x50;
cmd.args[1] = 0x01;
cmd.wlen = 2;
cmd.rlen = 14;
break;
default:
ret = -EINVAL;
goto err;
}
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
/*
* Possible values seen, in order from strong signal to weak:
* 16 0001 0110 full lock
* 1e 0001 1110 partial lock
* 1a 0001 1010 partial lock
* 18 0001 1000 no lock
*
* [b3:b1] lock bits
* [b4] statistics ready? Set in a few secs after lock is gained.
*/
switch ((cmd.args[2] >> 1) & 0x03) {
case 0x01:
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
break;
case 0x03:
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_LOCK;
break;
}
s->fe_status = *status;
dev_dbg(&s->client->dev, "%s: status=%02x args=%*ph\n",
__func__, *status, cmd.rlen, cmd.args);
return 0;
err:
dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int si2168_set_frontend(struct dvb_frontend *fe)
{
struct si2168 *s = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
struct si2168_cmd cmd;
u8 bandwidth, delivery_system;
dev_dbg(&s->client->dev,
"%s: delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u\n",
__func__, c->delivery_system, c->modulation,
c->frequency, c->bandwidth_hz, c->symbol_rate,
c->inversion);
if (!s->active) {
ret = -EAGAIN;
goto err;
}
switch (c->delivery_system) {
case SYS_DVBT:
delivery_system = 0x20;
break;
case SYS_DVBC_ANNEX_A:
delivery_system = 0x30;
break;
case SYS_DVBT2:
delivery_system = 0x70;
break;
default:
ret = -EINVAL;
goto err;
}
if (c->bandwidth_hz <= 5000000)
bandwidth = 0x05;
else if (c->bandwidth_hz <= 6000000)
bandwidth = 0x06;
else if (c->bandwidth_hz <= 7000000)
bandwidth = 0x07;
else if (c->bandwidth_hz <= 8000000)
bandwidth = 0x08;
else if (c->bandwidth_hz <= 9000000)
bandwidth = 0x09;
else if (c->bandwidth_hz <= 10000000)
bandwidth = 0x0a;
else
bandwidth = 0x0f;
/* program tuner */
if (fe->ops.tuner_ops.set_params) {
ret = fe->ops.tuner_ops.set_params(fe);
if (ret)
goto err;
}
memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
cmd.wlen = 5;
cmd.rlen = 5;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
/* that has no big effect */
if (c->delivery_system == SYS_DVBT)
memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
else if (c->delivery_system == SYS_DVBC_ANNEX_A)
memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
else if (c->delivery_system == SYS_DVBT2)
memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
cmd.wlen = 6;
cmd.rlen = 3;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x51\x03", 2);
cmd.wlen = 2;
cmd.rlen = 12;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x12\x08\x04", 3);
cmd.wlen = 3;
cmd.rlen = 3;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x01\x04\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x03\x10\x17\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x02\x10\x15\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x0b\x10\x88\x13", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
cmd.args[4] = delivery_system | bandwidth;
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x04\x10\x15\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x05\x10\xa1\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x0d\x10\xd0\x02", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x01\x10\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x18", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x15", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x04\x03\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x03\x03\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x08\x03\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x07\x03\x01\x02", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x06\x03\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x05\x03\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x40", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x01\x10\x16\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
cmd.args[0] = 0x85;
cmd.wlen = 1;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
s->delivery_system = c->delivery_system;
return 0;
err:
dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int si2168_init(struct dvb_frontend *fe)
{
struct si2168 *s = fe->demodulator_priv;
int ret, len, remaining;
const struct firmware *fw = NULL;
u8 *fw_file = SI2168_FIRMWARE;
const unsigned int i2c_wr_max = 8;
struct si2168_cmd cmd;
dev_dbg(&s->client->dev, "%s:\n", __func__);
cmd.args[0] = 0x13;
cmd.wlen = 1;
cmd.rlen = 0;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
cmd.args[0] = 0xc0;
cmd.args[1] = 0x12;
cmd.args[2] = 0x00;
cmd.args[3] = 0x0c;
cmd.args[4] = 0x00;
cmd.args[5] = 0x0d;
cmd.args[6] = 0x16;
cmd.args[7] = 0x00;
cmd.args[8] = 0x00;
cmd.args[9] = 0x00;
cmd.args[10] = 0x00;
cmd.args[11] = 0x00;
cmd.args[12] = 0x00;
cmd.wlen = 13;
cmd.rlen = 0;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
cmd.args[0] = 0xc0;
cmd.args[1] = 0x06;
cmd.args[2] = 0x01;
cmd.args[3] = 0x0f;
cmd.args[4] = 0x00;
cmd.args[5] = 0x20;
cmd.args[6] = 0x20;
cmd.args[7] = 0x01;
cmd.wlen = 8;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
cmd.args[0] = 0x02;
cmd.wlen = 1;
cmd.rlen = 13;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
cmd.args[0] = 0x05;
cmd.args[1] = 0x00;
cmd.args[2] = 0xaa;
cmd.args[3] = 0x4d;
cmd.args[4] = 0x56;
cmd.args[5] = 0x40;
cmd.args[6] = 0x00;
cmd.args[7] = 0x00;
cmd.wlen = 8;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
/* cold state - try to download firmware */
dev_info(&s->client->dev, "%s: found a '%s' in cold state\n",
KBUILD_MODNAME, si2168_ops.info.name);
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, &s->client->dev);
if (ret) {
dev_err(&s->client->dev, "%s: firmare file '%s' not found\n",
KBUILD_MODNAME, fw_file);
goto err;
}
dev_info(&s->client->dev, "%s: downloading firmware from file '%s'\n",
KBUILD_MODNAME, fw_file);
for (remaining = fw->size; remaining > 0; remaining -= i2c_wr_max) {
len = remaining;
if (len > i2c_wr_max)
len = i2c_wr_max;
memcpy(cmd.args, &fw->data[fw->size - remaining], len);
cmd.wlen = len;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret) {
dev_err(&s->client->dev,
"%s: firmware download failed=%d\n",
KBUILD_MODNAME, ret);
goto err;
}
}
release_firmware(fw);
fw = NULL;
cmd.args[0] = 0x01;
cmd.args[1] = 0x01;
cmd.wlen = 2;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
dev_info(&s->client->dev, "%s: found a '%s' in warm state\n",
KBUILD_MODNAME, si2168_ops.info.name);
s->active = true;
return 0;
err:
if (fw)
release_firmware(fw);
dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int si2168_sleep(struct dvb_frontend *fe)
{
struct si2168 *s = fe->demodulator_priv;
dev_dbg(&s->client->dev, "%s:\n", __func__);
s->active = false;
return 0;
}
static int si2168_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
s->min_delay_ms = 900;
return 0;
}
/*
* I2C gate logic
* We must use unlocked i2c_transfer() here because I2C lock is already taken
* by tuner driver.
*/
static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)
{
struct si2168 *s = mux_priv;
int ret;
struct i2c_msg gate_open_msg = {
.addr = s->client->addr,
.flags = 0,
.len = 3,
.buf = "\xc0\x0d\x01",
};
mutex_lock(&s->i2c_mutex);
/* open tuner I2C gate */
ret = __i2c_transfer(s->client->adapter, &gate_open_msg, 1);
if (ret != 1) {
dev_warn(&s->client->dev, "%s: i2c write failed=%d\n",
KBUILD_MODNAME, ret);
if (ret >= 0)
ret = -EREMOTEIO;
} else {
ret = 0;
}
return ret;
}
static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
{
struct si2168 *s = mux_priv;
int ret;
struct i2c_msg gate_close_msg = {
.addr = s->client->addr,
.flags = 0,
.len = 3,
.buf = "\xc0\x0d\x00",
};
/* close tuner I2C gate */
ret = __i2c_transfer(s->client->adapter, &gate_close_msg, 1);
if (ret != 1) {
dev_warn(&s->client->dev, "%s: i2c write failed=%d\n",
KBUILD_MODNAME, ret);
if (ret >= 0)
ret = -EREMOTEIO;
} else {
ret = 0;
}
mutex_unlock(&s->i2c_mutex);
return ret;
}
static const struct dvb_frontend_ops si2168_ops = {
.delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
.info = {
.name = "Silicon Labs Si2168",
.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 = si2168_get_tune_settings,
.init = si2168_init,
.sleep = si2168_sleep,
.set_frontend = si2168_set_frontend,
.read_status = si2168_read_status,
};
static int si2168_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct si2168_config *config = client->dev.platform_data;
struct si2168 *s;
int ret;
struct si2168_cmd cmd;
dev_dbg(&client->dev, "%s:\n", __func__);
s = kzalloc(sizeof(struct si2168), GFP_KERNEL);
if (!s) {
ret = -ENOMEM;
dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
goto err;
}
s->client = client;
mutex_init(&s->i2c_mutex);
/* check if the demod is there */
cmd.wlen = 0;
cmd.rlen = 1;
ret = si2168_cmd_execute(s, &cmd);
if (ret)
goto err;
/* create mux i2c adapter for tuner */
s->adapter = i2c_add_mux_adapter(client->adapter, &client->dev, s,
0, 0, 0, si2168_select, si2168_deselect);
if (s->adapter == NULL)
goto err;
/* create dvb_frontend */
memcpy(&s->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
s->fe.demodulator_priv = s;
*config->i2c_adapter = s->adapter;
*config->fe = &s->fe;
i2c_set_clientdata(client, s);
dev_info(&s->client->dev,
"%s: Silicon Labs Si2168 successfully attached\n",
KBUILD_MODNAME);
return 0;
err:
kfree(s);
dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int si2168_remove(struct i2c_client *client)
{
struct si2168 *s = i2c_get_clientdata(client);
dev_dbg(&client->dev, "%s:\n", __func__);
i2c_del_mux_adapter(s->adapter);
s->fe.ops.release = NULL;
s->fe.demodulator_priv = NULL;
kfree(s);
return 0;
}
static const struct i2c_device_id si2168_id[] = {
{"si2168", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, si2168_id);
static struct i2c_driver si2168_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "si2168",
},
.probe = si2168_probe,
.remove = si2168_remove,
.id_table = si2168_id,
};
module_i2c_driver(si2168_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(SI2168_FIRMWARE);
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