V4L/DVB (12788): tm6000: Add initial DVB-T support

Signed-off-by: Michel Ludwig <michel.ludwig@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 303 insertions, 0 deletions

diff --git a/drivers/staging/tm6000/tm6000-dvb.c b/drivers/staging/tm6000/tm6000-dvb.c
new file mode 100644
index 000000000000..d2ec6ca766cb
--- /dev/null
+++ b/drivers/staging/tm6000/tm6000-dvb.c
@@ -0,0 +1,303 @@
+/*
+   tm6000-dvb.c - dvb-t support for TM5600/TM6000 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/usb.h>
+
+#include "tm6000.h"
+#include "tm6000-regs.h"
+
+#include "hack.h"
+
+#include "zl10353.h"
+
+#include <media/tuner.h>
+
+static void tm6000_urb_received(struct urb *urb)
+{
+	int ret;
+	struct tm6000_core* dev = urb->context;
+
+	if(urb->status != 0){
+		printk(KERN_ERR "tm6000: status != 0\n");
+	}
+	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, maxPaketSize;
+	struct tm6000_dvb *dvb = dev->dvb;
+
+	printk(KERN_INFO "tm6000: got start stream request %s\n",__FUNCTION__);
+
+	tm6000_init_digital_mode(dev);
+
+// 	ret = usb_set_interface(dev->udev, 0, 1);
+// 	if (ret<0)
+// 		return ret;
+
+/*
+	ret = tm6000_set_led_status(tm6000_dev, 0x1);
+	if(ret < 0) {
+		return -1;
+	}
+*/
+
+	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;
+	}
+
+	maxPaketSize = dev->bulk_in->desc.wMaxPacketSize;
+
+	dvb->bulk_urb->transfer_buffer = kzalloc(maxPaketSize, 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;
+	}
+
+	pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in->desc.bEndpointAddress
+							  & USB_ENDPOINT_NUMBER_MASK);
+
+	usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
+						 dvb->bulk_urb->transfer_buffer,
+						 maxPaketSize,
+						 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;
+
+// 	tm6000_set_led_status(tm6000_dev, 0x0);
+
+	if(dvb->bulk_urb) {
+		usb_kill_urb(dvb->bulk_urb);
+		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->streaming_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);
+	--dvb->streams;
+
+	if(0 == dvb->streams) {
+		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 >> 1,
+				     .no_tuner = 1,
+// 				     .input_frequency = 0x19e9,
+// 				     .r56_agc_targets =  0x1c,
+				    };
+
+		dvb->frontend = pseudo_zl10353_attach(dev, &config,
+							   &dev->i2c_adap);
+	}
+	else {
+		printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
+		return -1;
+	}
+
+	if(dvb->frontend) {
+		return 0;
+	}
+	else {
+		return -1;
+	}
+}
+
+int tm6000_dvb_register(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);
+	dvb->adapter.priv = dev;
+
+	if(dvb->frontend) {
+		ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
+		if(ret < 0) {
+			printk("tm6000: couldn't register frontend\n");
+			goto adapter_err;
+		}
+
+		// attach the tuner like this for now
+		tm6000_i2c_call_clients(dev, VIDIOC_INT_DVB_TUNER_ATTACH, dvb->frontend);
+
+		printk("tm6000: XC2028/3028 asked to be attached to frontend!\n");
+	}
+	else {
+		printk("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 = 256;
+	dvb->demux.feednum = 256;
+	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_unregister_frontend(dvb->frontend);
+	}
+adapter_err:
+	dvb_unregister_adapter(&dvb->adapter);
+err:
+	return ret;
+}
+
+void tm6000_dvb_unregister(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_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);
+
+}