forked from Minki/linux
b7ba9f3480
smatch reports wait_status is uninitialized, because smatch cannot assume the loop body is ever executed. Clarify the code so that wait_status is retrieved at least once. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
941 lines
23 KiB
C
941 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver
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*
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* Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
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*/
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#include "si2157_priv.h"
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static const struct dvb_tuner_ops si2157_ops;
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static int tuner_lock_debug;
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module_param(tuner_lock_debug, int, 0644);
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MODULE_PARM_DESC(tuner_lock_debug, "if set, signal lock is briefly waited on after setting params");
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/* execute firmware command */
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static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
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{
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struct si2157_dev *dev = i2c_get_clientdata(client);
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int ret;
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unsigned long timeout;
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mutex_lock(&dev->i2c_mutex);
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if (cmd->wlen) {
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/* write cmd and args for firmware */
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ret = i2c_master_send(client, cmd->args, cmd->wlen);
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if (ret < 0) {
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goto err_mutex_unlock;
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} else if (ret != cmd->wlen) {
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ret = -EREMOTEIO;
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goto err_mutex_unlock;
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}
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}
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if (cmd->rlen) {
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/* wait cmd execution terminate */
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#define TIMEOUT 80
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timeout = jiffies + msecs_to_jiffies(TIMEOUT);
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while (!time_after(jiffies, timeout)) {
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ret = i2c_master_recv(client, cmd->args, cmd->rlen);
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if (ret < 0) {
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goto err_mutex_unlock;
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} else if (ret != cmd->rlen) {
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ret = -EREMOTEIO;
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goto err_mutex_unlock;
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}
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/* firmware ready? */
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if ((cmd->args[0] >> 7) & 0x01)
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break;
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}
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dev_dbg(&client->dev, "cmd execution took %d ms, status=%x\n",
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jiffies_to_msecs(jiffies) -
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(jiffies_to_msecs(timeout) - TIMEOUT),
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cmd->args[0]);
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if (!((cmd->args[0] >> 7) & 0x01)) {
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ret = -ETIMEDOUT;
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goto err_mutex_unlock;
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}
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/* check error status bit */
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if (cmd->args[0] & 0x40) {
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ret = -EAGAIN;
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goto err_mutex_unlock;
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}
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}
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mutex_unlock(&dev->i2c_mutex);
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return 0;
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err_mutex_unlock:
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mutex_unlock(&dev->i2c_mutex);
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int si2157_init(struct dvb_frontend *fe)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret, len, remaining;
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struct si2157_cmd cmd;
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const struct firmware *fw;
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const char *fw_name;
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unsigned int chip_id, xtal_trim;
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dev_dbg(&client->dev, "\n");
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/* Try to get Xtal trim property, to verify tuner still running */
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memcpy(cmd.args, "\x15\x00\x04\x02", 4);
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cmd.wlen = 4;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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xtal_trim = cmd.args[2] | (cmd.args[3] << 8);
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if (ret == 0 && xtal_trim < 16)
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goto warm;
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dev->if_frequency = 0; /* we no longer know current tuner state */
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/* power up */
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if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
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memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
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cmd.wlen = 9;
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} else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
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memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
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cmd.wlen = 10;
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} else {
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memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
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cmd.wlen = 15;
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}
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret && (dev->chiptype != SI2157_CHIPTYPE_SI2141 || ret != -EAGAIN))
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goto err;
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/* Si2141 needs a second command before it answers the revision query */
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if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
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memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
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cmd.wlen = 7;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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}
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if (dev->dont_load_firmware) {
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dev_info(&client->dev, "device is buggy, skipping firmware download\n");
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goto skip_fw_download;
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}
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/* query chip revision */
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memcpy(cmd.args, "\x02", 1);
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cmd.wlen = 1;
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cmd.rlen = 13;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
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cmd.args[4] << 0;
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#define SI2177_A30 ('A' << 24 | 77 << 16 | '3' << 8 | '0' << 0)
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#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
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#define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
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#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
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#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
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#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
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#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
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switch (chip_id) {
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case SI2158_A20:
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case SI2148_A20:
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fw_name = SI2158_A20_FIRMWARE;
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break;
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case SI2141_A10:
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fw_name = SI2141_A10_FIRMWARE;
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break;
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case SI2177_A30:
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fw_name = SI2157_A30_FIRMWARE;
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break;
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case SI2157_A30:
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case SI2147_A30:
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case SI2146_A10:
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fw_name = NULL;
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break;
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default:
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dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
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cmd.args[2], cmd.args[1],
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cmd.args[3], cmd.args[4]);
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ret = -EINVAL;
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goto err;
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}
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dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
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cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
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if (fw_name == NULL)
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goto skip_fw_download;
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/* request the firmware, this will block and timeout */
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ret = request_firmware(&fw, fw_name, &client->dev);
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if (ret) {
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dev_err(&client->dev, "firmware file '%s' not found\n",
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fw_name);
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goto err;
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}
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/* firmware should be n chunks of 17 bytes */
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if (fw->size % 17 != 0) {
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dev_err(&client->dev, "firmware file '%s' is invalid\n",
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fw_name);
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ret = -EINVAL;
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goto err_release_firmware;
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}
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dev_info(&client->dev, "downloading firmware from file '%s'\n",
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fw_name);
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for (remaining = fw->size; remaining > 0; remaining -= 17) {
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len = fw->data[fw->size - remaining];
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if (len > SI2157_ARGLEN) {
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dev_err(&client->dev, "Bad firmware length\n");
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ret = -EINVAL;
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goto err_release_firmware;
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}
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memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
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cmd.wlen = len;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret) {
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dev_err(&client->dev, "firmware download failed %d\n",
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ret);
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goto err_release_firmware;
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}
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}
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release_firmware(fw);
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skip_fw_download:
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/* reboot the tuner with new firmware? */
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memcpy(cmd.args, "\x01\x01", 2);
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cmd.wlen = 2;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/* query firmware version */
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memcpy(cmd.args, "\x11", 1);
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cmd.wlen = 1;
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cmd.rlen = 10;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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dev_info(&client->dev, "firmware version: %c.%c.%d\n",
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cmd.args[6], cmd.args[7], cmd.args[8]);
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/* enable tuner status flags */
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memcpy(cmd.args, "\x14\x00\x01\x05\x01\x00", 6);
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cmd.wlen = 6;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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memcpy(cmd.args, "\x14\x00\x01\x06\x01\x00", 6);
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cmd.wlen = 6;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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memcpy(cmd.args, "\x14\x00\x01\x07\x01\x00", 6);
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cmd.wlen = 6;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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warm:
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/* init statistics in order signal app which are supported */
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c->strength.len = 1;
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c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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/* start statistics polling */
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schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
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dev->active = true;
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return 0;
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err_release_firmware:
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release_firmware(fw);
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int si2157_sleep(struct dvb_frontend *fe)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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int ret;
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struct si2157_cmd cmd;
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dev_dbg(&client->dev, "\n");
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dev->active = false;
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/* stop statistics polling */
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cancel_delayed_work_sync(&dev->stat_work);
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/* standby */
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memcpy(cmd.args, "\x16\x00", 2);
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cmd.wlen = 2;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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return 0;
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int si2157_tune_wait(struct i2c_client *client, u8 is_digital)
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{
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#define TUN_TIMEOUT 40
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#define DIG_TIMEOUT 30
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#define ANALOG_TIMEOUT 150
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struct si2157_dev *dev = i2c_get_clientdata(client);
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int ret;
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unsigned long timeout;
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unsigned long start_time;
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u8 wait_status;
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u8 tune_lock_mask;
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if (is_digital)
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tune_lock_mask = 0x04;
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else
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tune_lock_mask = 0x02;
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mutex_lock(&dev->i2c_mutex);
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/* wait tuner command complete */
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start_time = jiffies;
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timeout = start_time + msecs_to_jiffies(TUN_TIMEOUT);
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while (1) {
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ret = i2c_master_recv(client, &wait_status,
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sizeof(wait_status));
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if (ret < 0) {
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goto err_mutex_unlock;
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} else if (ret != sizeof(wait_status)) {
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ret = -EREMOTEIO;
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goto err_mutex_unlock;
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}
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if (time_after(jiffies, timeout))
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break;
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/* tuner done? */
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if ((wait_status & 0x81) == 0x81)
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break;
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usleep_range(5000, 10000);
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}
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dev_dbg(&client->dev, "tuning took %d ms, status=0x%x\n",
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jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time),
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wait_status);
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/* if we tuned ok, wait a bit for tuner lock */
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if (tuner_lock_debug && (wait_status & 0x81) == 0x81) {
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if (is_digital)
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timeout = jiffies + msecs_to_jiffies(DIG_TIMEOUT);
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else
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timeout = jiffies + msecs_to_jiffies(ANALOG_TIMEOUT);
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while (!time_after(jiffies, timeout)) {
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ret = i2c_master_recv(client, &wait_status,
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sizeof(wait_status));
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if (ret < 0) {
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goto err_mutex_unlock;
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} else if (ret != sizeof(wait_status)) {
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ret = -EREMOTEIO;
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goto err_mutex_unlock;
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}
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/* tuner locked? */
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if (wait_status & tune_lock_mask)
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break;
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usleep_range(5000, 10000);
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}
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dev_dbg(&client->dev, "tuning+lock took %d ms, status=0x%x\n",
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jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time),
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wait_status);
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}
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if ((wait_status & 0xc0) != 0x80) {
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ret = -ETIMEDOUT;
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goto err_mutex_unlock;
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}
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mutex_unlock(&dev->i2c_mutex);
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return 0;
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err_mutex_unlock:
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mutex_unlock(&dev->i2c_mutex);
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dev_err(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int si2157_set_params(struct dvb_frontend *fe)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret;
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struct si2157_cmd cmd;
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u8 bandwidth, delivery_system;
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u32 if_frequency = 5000000;
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dev_dbg(&client->dev,
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"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
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c->delivery_system, c->frequency, c->bandwidth_hz);
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if (!dev->active) {
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ret = -EAGAIN;
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goto err;
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}
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if (c->bandwidth_hz <= 6000000)
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bandwidth = 0x06;
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else if (c->bandwidth_hz <= 7000000)
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bandwidth = 0x07;
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else if (c->bandwidth_hz <= 8000000)
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bandwidth = 0x08;
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else
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bandwidth = 0x0f;
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switch (c->delivery_system) {
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case SYS_ATSC:
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delivery_system = 0x00;
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if_frequency = 3250000;
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break;
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case SYS_DVBC_ANNEX_B:
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delivery_system = 0x10;
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if_frequency = 4000000;
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break;
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case SYS_DVBT:
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case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
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delivery_system = 0x20;
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break;
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case SYS_DVBC_ANNEX_A:
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delivery_system = 0x30;
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break;
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default:
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ret = -EINVAL;
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goto err;
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}
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|
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memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
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cmd.args[4] = delivery_system | bandwidth;
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if (dev->inversion)
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cmd.args[5] = 0x01;
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
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memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
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else
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memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
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cmd.args[4] = dev->if_port;
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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|
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/* set digital if frequency if needed */
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if (if_frequency != dev->if_frequency) {
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memcpy(cmd.args, "\x14\x00\x06\x07", 4);
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cmd.args[4] = (if_frequency / 1000) & 0xff;
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cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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|
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dev->if_frequency = if_frequency;
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}
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|
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/* set digital frequency */
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memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
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cmd.args[4] = (c->frequency >> 0) & 0xff;
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cmd.args[5] = (c->frequency >> 8) & 0xff;
|
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cmd.args[6] = (c->frequency >> 16) & 0xff;
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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);
|