- 根目录:
- drivers
- staging
- tm6000
- tm6000-dvb.c
/*
* tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices
*
* Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
*
* 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 version 2
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include "tm6000.h"
#include "tm6000-regs.h"
#include "zl10353.h"
#include <media/tuner.h>
#include "tuner-xc2028.h"
#include "xc5000.h"
MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},"
"{{Trident, tm6000},"
"{{Trident, tm6010}");
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug message");
static inline void print_err_status(struct tm6000_core *dev,
int packet, int status)
{
char *errmsg = "Unknown";
switch (status) {
case -ENOENT:
errmsg = "unlinked synchronuously";
break;
case -ECONNRESET:
errmsg = "unlinked asynchronuously";
break;
case -ENOSR:
errmsg = "Buffer error (overrun)";
break;
case -EPIPE:
errmsg = "Stalled (device not responding)";
break;
case -EOVERFLOW:
errmsg = "Babble (bad cable?)";
break;
case -EPROTO:
errmsg = "Bit-stuff error (bad cable?)";
break;
case -EILSEQ:
errmsg = "CRC/Timeout (could be anything)";
break;
case -ETIME:
errmsg = "Device does not respond";
break;
}
if (packet < 0) {
dprintk(dev, 1, "URB status %d [%s].\n",
status, errmsg);
} else {
dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
packet, status, errmsg);
}
}
static void tm6000_urb_received(struct urb *urb)
{
int ret;
struct tm6000_core *dev = urb->context;
if (urb->status != 0)
print_err_status(dev, 0, urb->status);
else if (urb->actual_length > 0)
dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
urb->actual_length);
if (dev->dvb->streams > 0) {
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
printk(KERN_ERR "tm6000: error %s\n", __FUNCTION__);
kfree(urb->transfer_buffer);
usb_free_urb(urb);
}
}
}
int tm6000_start_stream(struct tm6000_core *dev)
{
int ret;
unsigned int pipe, size;
struct tm6000_dvb *dvb = dev->dvb;
printk(KERN_INFO "tm6000: got start stream request %s\n", __FUNCTION__);
if (dev->mode != TM6000_MODE_DIGITAL) {
tm6000_init_digital_mode(dev);
dev->mode = TM6000_MODE_DIGITAL;
}
dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
if (dvb->bulk_urb == NULL) {
printk(KERN_ERR "tm6000: couldn't allocate urb\n");
return -ENOMEM;
}
pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
& USB_ENDPOINT_NUMBER_MASK);
size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
size = size * 15; /* 512 x 8 or 12 or 15 */
dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
if (dvb->bulk_urb->transfer_buffer == NULL) {
usb_free_urb(dvb->bulk_urb);
printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
return -ENOMEM;
}
usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
dvb->bulk_urb->transfer_buffer,
size,
tm6000_urb_received, dev);
ret = usb_clear_halt(dev->udev, pipe);
if (ret < 0) {
printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
ret, __FUNCTION__);
return ret;
} else
printk(KERN_ERR "tm6000: pipe resetted\n");
/* mutex_lock(&tm6000_driver.open_close_mutex); */
ret = usb_submit_urb(dvb->bulk_urb, GFP_KERNEL);
/* mutex_unlock(&tm6000_driver.open_close_mutex); */
if (ret) {
printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
ret);
kfree(dvb->bulk_urb->transfer_buffer);
usb_free_urb(dvb->bulk_urb);
return ret;
}
return 0;
}
void tm6000_stop_stream(struct tm6000_core *dev)
{
struct tm6000_dvb *dvb = dev->dvb;
if (dvb->bulk_urb) {
printk(KERN_INFO "urb killing\n");
usb_kill_urb(dvb->bulk_urb);
printk(KERN_INFO "urb buffer free\n");
kfree(dvb->bulk_urb->transfer_buffer);
usb_free_urb(dvb->bulk_urb);
dvb->bulk_urb = NULL;
}
}
int tm6000_start_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct tm6000_core *dev = demux->priv;
struct tm6000_dvb *dvb = dev->dvb;
printk(KERN_INFO "tm6000: got start feed request %s\n", __FUNCTION__);
mutex_lock(&dvb->mutex);
if (dvb->streams == 0) {
dvb->streams = 1;
/* mutex_init(&tm6000_dev->streming_mutex); */
tm6000_start_stream(dev);
} else
++(dvb->streams);
mutex_unlock(&dvb->mutex);
return 0;
}
int tm6000_stop_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct tm6000_core *dev = demux->priv;
struct tm6000_dvb *dvb = dev->dvb;
printk(KERN_INFO "tm6000: got stop feed request %s\n", __FUNCTION__);
mutex_lock(&dvb->mutex);
printk(KERN_INFO "stream %#x\n", dvb->streams);
--(dvb->streams);
if (dvb->streams == 0) {
printk(KERN_INFO "stop stream\n");
tm6000_stop_stream(dev);
/* mutex_destroy(&tm6000_dev->streaming_mutex); */
}
mutex_unlock(&dvb->mutex);
/* mutex_destroy(&tm6000_dev->streaming_mutex); */
return 0;
}
int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
{
struct tm6000_dvb *dvb = dev->dvb;
if (dev->caps.has_zl10353) {
struct zl10353_config config = {
.demod_address = dev->demod_addr,
.no_tuner = 1,
.parallel_ts = 1,
.if2 = 45700,
.disable_i2c_gate_ctrl = 1,
};
dvb->frontend = dvb_attach(zl10353_attach, &config,
&dev->i2c_adap);
} else {
printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
return -1;
}
return (!dvb->frontend) ? -1 : 0;
}
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
int register_dvb(struct tm6000_core *dev)
{
int ret = -1;
struct tm6000_dvb *dvb = dev->dvb;
mutex_init(&dvb->mutex);
dvb->streams = 0;
/* attach the frontend */
ret = tm6000_dvb_attach_frontend(dev);
if (ret < 0) {
printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
goto err;
}
ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
THIS_MODULE, &dev->udev->dev, adapter_nr);
dvb->adapter.priv = dev;
if (dvb->frontend) {
switch (dev->tuner_type) {
case TUNER_XC2028: {
struct xc2028_config cfg = {
.i2c_adap = &dev->i2c_adap,
.i2c_addr = dev->tuner_addr,
};
dvb->frontend->callback = tm6000_tuner_callback;
ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
if (ret < 0) {
printk(KERN_ERR
"tm6000: couldn't register frontend\n");
goto adapter_err;
}
if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
printk(KERN_ERR "tm6000: couldn't register "
"frontend (xc3028)\n");
ret = -EINVAL;
goto frontend_err;
}
printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
"attached to frontend!\n");
break;
}
case TUNER_XC5000: {
struct xc5000_config cfg = {
.i2c_address = dev->tuner_addr,
};
dvb->frontend->callback = tm6000_xc5000_callback;
ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
if (ret < 0) {
printk(KERN_ERR
"tm6000: couldn't register frontend\n");
goto adapter_err;
}
if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
printk(KERN_ERR "tm6000: couldn't register "
"frontend (xc5000)\n");
ret = -EINVAL;
goto frontend_err;
}
printk(KERN_INFO "tm6000: XC5000 asked to be "
"attached to frontend!\n");
break;
}
}
} else
printk(KERN_ERR "tm6000: no frontend found\n");
dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
| DMX_MEMORY_BASED_FILTERING;
dvb->demux.priv = dev;
dvb->demux.filternum = 8;
dvb->demux.feednum = 8;
dvb->demux.start_feed = tm6000_start_feed;
dvb->demux.stop_feed = tm6000_stop_feed;
dvb->demux.write_to_decoder = NULL;
ret = dvb_dmx_init(&dvb->demux);
if (ret < 0) {
printk("tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
goto frontend_err;
}
dvb->dmxdev.filternum = dev->dvb->demux.filternum;
dvb->dmxdev.demux = &dev->dvb->demux.dmx;
dvb->dmxdev.capabilities = 0;
ret = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
if (ret < 0) {
printk("tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
goto dvb_dmx_err;
}
return 0;
dvb_dmx_err:
dvb_dmx_release(&dvb->demux);
frontend_err:
if (dvb->frontend) {
dvb_frontend_detach(dvb->frontend);
dvb_unregister_frontend(dvb->frontend);
}
adapter_err:
dvb_unregister_adapter(&dvb->adapter);
err:
return ret;
}
void unregister_dvb(struct tm6000_core *dev)
{
struct tm6000_dvb *dvb = dev->dvb;
if (dvb->bulk_urb != NULL) {
struct urb *bulk_urb = dvb->bulk_urb;
kfree(bulk_urb->transfer_buffer);
bulk_urb->transfer_buffer = NULL;
usb_unlink_urb(bulk_urb);
usb_free_urb(bulk_urb);
}
/* mutex_lock(&tm6000_driver.open_close_mutex); */
if (dvb->frontend) {
dvb_frontend_detach(dvb->frontend);
dvb_unregister_frontend(dvb->frontend);
}
dvb_dmxdev_release(&dvb->dmxdev);
dvb_dmx_release(&dvb->demux);
dvb_unregister_adapter(&dvb->adapter);
mutex_destroy(&dvb->mutex);
/* mutex_unlock(&tm6000_driver.open_close_mutex); */
}
static int dvb_init(struct tm6000_core *dev)
{
struct tm6000_dvb *dvb;
int rc;
if (!dev)
return 0;
if (!dev->caps.has_dvb)
return 0;
dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
if (!dvb) {
printk(KERN_INFO "Cannot allocate memory\n");
return -ENOMEM;
}
dev->dvb = dvb;
rc = register_dvb(dev);
if (rc < 0) {
kfree(dvb);
dev->dvb = NULL;
return 0;
}
return 0;
}
static int dvb_fini(struct tm6000_core *dev)
{
if (!dev)
return 0;
if (!dev->caps.has_dvb)
return 0;
if (dev->dvb) {
unregister_dvb(dev);
kfree(dev->dvb);
dev->dvb = NULL;
}
return 0;
}
static struct tm6000_ops dvb_ops = {
.type = TM6000_DVB,
.name = "TM6000 dvb Extension",
.init = dvb_init,
.fini = dvb_fini,
};
static int __init tm6000_dvb_register(void)
{
return tm6000_register_extension(&dvb_ops);
}
static void __exit tm6000_dvb_unregister(void)
{
tm6000_unregister_extension(&dvb_ops);
}
module_init(tm6000_dvb_register);
module_exit(tm6000_dvb_unregister);