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/*
* Silicon Labs Si2146/2147/2157/2158 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 si2157 *s, struct si2157_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 80
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, "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;
}
}
ret = 0;
err_mutex_unlock:
mutex_unlock(&s->i2c_mutex);
if (ret)
goto err;
return 0;
err:
dev_dbg(&s->client->dev, "failed=%d\n", ret);
return ret;
}
static int si2157_init(struct dvb_frontend *fe)
{
struct si2157 *s = fe->tuner_priv;
int ret, len, remaining;
struct si2157_cmd cmd;
const struct firmware *fw = NULL;
u8 *fw_file;
unsigned int chip_id;
dev_dbg(&s->client->dev, "\n");
if (s->fw_loaded)
goto warm;
/* power up */
if (s->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(s, &cmd);
if (ret)
goto err;
/* query chip revision */
memcpy(cmd.args, "\x02", 1);
cmd.wlen = 1;
cmd.rlen = 13;
ret = si2157_cmd_execute(s, &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 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:
fw_file = SI2158_A20_FIRMWARE;
break;
case SI2157_A30:
case SI2147_A30:
case SI2146_A10:
goto skip_fw_download;
default:
dev_err(&s->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;
}
/* cold state - try to download firmware */
dev_info(&s->client->dev, "found a '%s' in cold state\n",
si2157_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, "firmware file '%s' not found\n",
fw_file);
goto err;
}
/* firmware should be n chunks of 17 bytes */
if (fw->size % 17 != 0) {
dev_err(&s->client->dev, "firmware file '%s' is invalid\n",
fw_file);
ret = -EINVAL;
goto err;
}
dev_info(&s->client->dev, "downloading firmware from file '%s'\n",
fw_file);
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(s, &cmd);
if (ret) {
dev_err(&s->client->dev,
"firmware download failed=%d\n",
ret);
goto err;
}
}
release_firmware(fw);
fw = NULL;
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(s, &cmd);
if (ret)
goto err;
s->fw_loaded = true;
warm:
s->active = true;
return 0;
err:
if (fw)
release_firmware(fw);
dev_dbg(&s->client->dev, "failed=%d\n", ret);
return ret;
}
static int si2157_sleep(struct dvb_frontend *fe)
{
struct si2157 *s = fe->tuner_priv;
int ret;
struct si2157_cmd cmd;
dev_dbg(&s->client->dev, "\n");
s->active = false;
/* standby */
memcpy(cmd.args, "\x16\x00", 2);
cmd.wlen = 2;
cmd.rlen = 1;
ret = si2157_cmd_execute(s, &cmd);
if (ret)
goto err;
return 0;
err:
dev_dbg(&s->client->dev, "failed=%d\n", ret);
return ret;
}
static int si2157_set_params(struct dvb_frontend *fe)
{
struct si2157 *s = fe->tuner_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
struct si2157_cmd cmd;
u8 bandwidth, delivery_system;
dev_dbg(&s->client->dev,
"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
c->delivery_system, c->frequency,
c->bandwidth_hz);
if (!s->active) {
ret = -EAGAIN;
goto err;
}
if (c->bandwidth_hz <= 6000000)
bandwidth =
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