linuxdebug/drivers/media/usb/as102/as102_drv.c

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2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Abilis Systems Single DVB-T Receiver
* Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
* Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/kref.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
/* header file for usb device driver*/
#include "as102_drv.h"
#include "as10x_cmd.h"
#include "as102_fe.h"
#include "as102_fw.h"
#include <media/dvbdev.h>
int dual_tuner;
module_param_named(dual_tuner, dual_tuner, int, 0644);
MODULE_PARM_DESC(dual_tuner, "Activate Dual-Tuner config (default: off)");
static int fw_upload = 1;
module_param_named(fw_upload, fw_upload, int, 0644);
MODULE_PARM_DESC(fw_upload, "Turn on/off default FW upload (default: on)");
static int pid_filtering;
module_param_named(pid_filtering, pid_filtering, int, 0644);
MODULE_PARM_DESC(pid_filtering, "Activate HW PID filtering (default: off)");
static int ts_auto_disable;
module_param_named(ts_auto_disable, ts_auto_disable, int, 0644);
MODULE_PARM_DESC(ts_auto_disable, "Stream Auto Enable on FW (default: off)");
int elna_enable = 1;
module_param_named(elna_enable, elna_enable, int, 0644);
MODULE_PARM_DESC(elna_enable, "Activate eLNA (default: on)");
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
static void as102_stop_stream(struct as102_dev_t *dev)
{
struct as10x_bus_adapter_t *bus_adap;
if (dev != NULL)
bus_adap = &dev->bus_adap;
else
return;
if (bus_adap->ops->stop_stream != NULL)
bus_adap->ops->stop_stream(dev);
if (ts_auto_disable) {
if (mutex_lock_interruptible(&dev->bus_adap.lock))
return;
if (as10x_cmd_stop_streaming(bus_adap) < 0)
dev_dbg(&dev->bus_adap.usb_dev->dev,
"as10x_cmd_stop_streaming failed\n");
mutex_unlock(&dev->bus_adap.lock);
}
}
static int as102_start_stream(struct as102_dev_t *dev)
{
struct as10x_bus_adapter_t *bus_adap;
int ret = -EFAULT;
if (dev != NULL)
bus_adap = &dev->bus_adap;
else
return ret;
if (bus_adap->ops->start_stream != NULL)
ret = bus_adap->ops->start_stream(dev);
if (ts_auto_disable) {
if (mutex_lock_interruptible(&dev->bus_adap.lock))
return -EFAULT;
ret = as10x_cmd_start_streaming(bus_adap);
mutex_unlock(&dev->bus_adap.lock);
}
return ret;
}
static int as10x_pid_filter(struct as102_dev_t *dev,
int index, u16 pid, int onoff) {
struct as10x_bus_adapter_t *bus_adap = &dev->bus_adap;
int ret = -EFAULT;
if (mutex_lock_interruptible(&dev->bus_adap.lock)) {
dev_dbg(&dev->bus_adap.usb_dev->dev,
"amutex_lock_interruptible(lock) failed !\n");
return -EBUSY;
}
switch (onoff) {
case 0:
ret = as10x_cmd_del_PID_filter(bus_adap, (uint16_t) pid);
dev_dbg(&dev->bus_adap.usb_dev->dev,
"DEL_PID_FILTER([%02d] 0x%04x) ret = %d\n",
index, pid, ret);
break;
case 1:
{
struct as10x_ts_filter filter;
filter.type = TS_PID_TYPE_TS;
filter.idx = 0xFF;
filter.pid = pid;
ret = as10x_cmd_add_PID_filter(bus_adap, &filter);
dev_dbg(&dev->bus_adap.usb_dev->dev,
"ADD_PID_FILTER([%02d -> %02d], 0x%04x) ret = %d\n",
index, filter.idx, filter.pid, ret);
break;
}
}
mutex_unlock(&dev->bus_adap.lock);
return ret;
}
static int as102_dvb_dmx_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
int ret = 0;
struct dvb_demux *demux = dvbdmxfeed->demux;
struct as102_dev_t *as102_dev = demux->priv;
if (mutex_lock_interruptible(&as102_dev->sem))
return -ERESTARTSYS;
if (pid_filtering)
as10x_pid_filter(as102_dev, dvbdmxfeed->index,
dvbdmxfeed->pid, 1);
if (as102_dev->streaming++ == 0)
ret = as102_start_stream(as102_dev);
mutex_unlock(&as102_dev->sem);
return ret;
}
static int as102_dvb_dmx_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
struct dvb_demux *demux = dvbdmxfeed->demux;
struct as102_dev_t *as102_dev = demux->priv;
if (mutex_lock_interruptible(&as102_dev->sem))
return -ERESTARTSYS;
if (--as102_dev->streaming == 0)
as102_stop_stream(as102_dev);
if (pid_filtering)
as10x_pid_filter(as102_dev, dvbdmxfeed->index,
dvbdmxfeed->pid, 0);
mutex_unlock(&as102_dev->sem);
return 0;
}
static int as102_set_tune(void *priv, struct as10x_tune_args *tune_args)
{
struct as10x_bus_adapter_t *bus_adap = priv;
int ret;
/* Set frontend arguments */
if (mutex_lock_interruptible(&bus_adap->lock))
return -EBUSY;
ret = as10x_cmd_set_tune(bus_adap, tune_args);
if (ret != 0)
dev_dbg(&bus_adap->usb_dev->dev,
"as10x_cmd_set_tune failed. (err = %d)\n", ret);
mutex_unlock(&bus_adap->lock);
return ret;
}
static int as102_get_tps(void *priv, struct as10x_tps *tps)
{
struct as10x_bus_adapter_t *bus_adap = priv;
int ret;
if (mutex_lock_interruptible(&bus_adap->lock))
return -EBUSY;
/* send abilis command: GET_TPS */
ret = as10x_cmd_get_tps(bus_adap, tps);
mutex_unlock(&bus_adap->lock);
return ret;
}
static int as102_get_status(void *priv, struct as10x_tune_status *tstate)
{
struct as10x_bus_adapter_t *bus_adap = priv;
int ret;
if (mutex_lock_interruptible(&bus_adap->lock))
return -EBUSY;
/* send abilis command: GET_TUNE_STATUS */
ret = as10x_cmd_get_tune_status(bus_adap, tstate);
if (ret < 0) {
dev_dbg(&bus_adap->usb_dev->dev,
"as10x_cmd_get_tune_status failed (err = %d)\n",
ret);
}
mutex_unlock(&bus_adap->lock);
return ret;
}
static int as102_get_stats(void *priv, struct as10x_demod_stats *demod_stats)
{
struct as10x_bus_adapter_t *bus_adap = priv;
int ret;
if (mutex_lock_interruptible(&bus_adap->lock))
return -EBUSY;
/* send abilis command: GET_TUNE_STATUS */
ret = as10x_cmd_get_demod_stats(bus_adap, demod_stats);
if (ret < 0) {
dev_dbg(&bus_adap->usb_dev->dev,
"as10x_cmd_get_demod_stats failed (probably not tuned)\n");
} else {
dev_dbg(&bus_adap->usb_dev->dev,
"demod status: fc: 0x%08x, bad fc: 0x%08x, bytes corrected: 0x%08x , MER: 0x%04x\n",
demod_stats->frame_count,
demod_stats->bad_frame_count,
demod_stats->bytes_fixed_by_rs,
demod_stats->mer);
}
mutex_unlock(&bus_adap->lock);
return ret;
}
static int as102_stream_ctrl(void *priv, int acquire, uint32_t elna_cfg)
{
struct as10x_bus_adapter_t *bus_adap = priv;
int ret;
if (mutex_lock_interruptible(&bus_adap->lock))
return -EBUSY;
if (acquire) {
if (elna_enable)
as10x_cmd_set_context(bus_adap,
CONTEXT_LNA, elna_cfg);
ret = as10x_cmd_turn_on(bus_adap);
} else {
ret = as10x_cmd_turn_off(bus_adap);
}
mutex_unlock(&bus_adap->lock);
return ret;
}
static const struct as102_fe_ops as102_fe_ops = {
.set_tune = as102_set_tune,
.get_tps = as102_get_tps,
.get_status = as102_get_status,
.get_stats = as102_get_stats,
.stream_ctrl = as102_stream_ctrl,
};
int as102_dvb_register(struct as102_dev_t *as102_dev)
{
struct device *dev = &as102_dev->bus_adap.usb_dev->dev;
int ret;
ret = dvb_register_adapter(&as102_dev->dvb_adap,
as102_dev->name, THIS_MODULE,
dev, adapter_nr);
if (ret < 0) {
dev_err(dev, "%s: dvb_register_adapter() failed: %d\n",
__func__, ret);
return ret;
}
as102_dev->dvb_dmx.priv = as102_dev;
as102_dev->dvb_dmx.filternum = pid_filtering ? 16 : 256;
as102_dev->dvb_dmx.feednum = 256;
as102_dev->dvb_dmx.start_feed = as102_dvb_dmx_start_feed;
as102_dev->dvb_dmx.stop_feed = as102_dvb_dmx_stop_feed;
as102_dev->dvb_dmx.dmx.capabilities = DMX_TS_FILTERING |
DMX_SECTION_FILTERING;
as102_dev->dvb_dmxdev.filternum = as102_dev->dvb_dmx.filternum;
as102_dev->dvb_dmxdev.demux = &as102_dev->dvb_dmx.dmx;
as102_dev->dvb_dmxdev.capabilities = 0;
ret = dvb_dmx_init(&as102_dev->dvb_dmx);
if (ret < 0) {
dev_err(dev, "%s: dvb_dmx_init() failed: %d\n", __func__, ret);
goto edmxinit;
}
ret = dvb_dmxdev_init(&as102_dev->dvb_dmxdev, &as102_dev->dvb_adap);
if (ret < 0) {
dev_err(dev, "%s: dvb_dmxdev_init() failed: %d\n",
__func__, ret);
goto edmxdinit;
}
/* Attach the frontend */
as102_dev->dvb_fe = dvb_attach(as102_attach, as102_dev->name,
&as102_fe_ops,
&as102_dev->bus_adap,
as102_dev->elna_cfg);
if (!as102_dev->dvb_fe) {
ret = -ENODEV;
dev_err(dev, "%s: as102_attach() failed: %d",
__func__, ret);
goto efereg;
}
ret = dvb_register_frontend(&as102_dev->dvb_adap, as102_dev->dvb_fe);
if (ret < 0) {
dev_err(dev, "%s: as102_dvb_register_frontend() failed: %d",
__func__, ret);
goto efereg;
}
/* init bus mutex for token locking */
mutex_init(&as102_dev->bus_adap.lock);
/* init start / stop stream mutex */
mutex_init(&as102_dev->sem);
/*
* try to load as102 firmware. If firmware upload failed, we'll be
* able to upload it later.
*/
if (fw_upload)
try_then_request_module(as102_fw_upload(&as102_dev->bus_adap),
"firmware_class");
pr_info("Registered device %s", as102_dev->name);
return 0;
efereg:
dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
edmxdinit:
dvb_dmx_release(&as102_dev->dvb_dmx);
edmxinit:
dvb_unregister_adapter(&as102_dev->dvb_adap);
return ret;
}
void as102_dvb_unregister(struct as102_dev_t *as102_dev)
{
/* unregister as102 frontend */
dvb_unregister_frontend(as102_dev->dvb_fe);
/* detach frontend */
dvb_frontend_detach(as102_dev->dvb_fe);
/* unregister demux device */
dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
dvb_dmx_release(&as102_dev->dvb_dmx);
/* unregister dvb adapter */
dvb_unregister_adapter(&as102_dev->dvb_adap);
pr_info("Unregistered device %s", as102_dev->name);
}
module_usb_driver(as102_usb_driver);
/* modinfo details */
MODULE_DESCRIPTION(DRIVER_FULL_NAME);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pierrick Hascoet <pierrick.hascoet@abilis.com>");