V4L/DVB (7679): pvrusb2: add DVB API framework

Add basic framework for the DVB API.  This is enough to control the
tuner & demod of the digital frontend, but the stream & buffer handling
is still missing.

Additional note from Mike Isely <isely@pobox.com> - also, since these
changes are still very experimental arrange for DVB changes to be
compiled in via new CONFIG_VIDEO_PVRUSB2_DVB option, for now.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pvrusb2/Makefile

 obj-pvrusb2-sysfs-$(CONFIG_VIDEO_PVRUSB2_SYSFS) := pvrusb2-sysfs.o
 obj-pvrusb2-debugifc-$(CONFIG_VIDEO_PVRUSB2_DEBUGIFC) := pvrusb2-debugifc.o
+obj-pvrusb2-debugifc-$(CONFIG_VIDEO_PVRUSB2_DVB) := pvrusb2-dvb.o
 
 pvrusb2-objs	:= pvrusb2-i2c-core.o pvrusb2-i2c-cmd-v4l2.o \
 		   pvrusb2-audio.o pvrusb2-i2c-chips-v4l2.o \
@@ -9,6 +10,11 @@ pvrusb2-objs	:= pvrusb2-i2c-core.o pvrusb2-i2c-cmd-v4l2.o \
 		   pvrusb2-ctrl.o pvrusb2-std.o pvrusb2-devattr.o \
 		   pvrusb2-context.o pvrusb2-io.o pvrusb2-ioread.o \
 		   pvrusb2-cx2584x-v4l.o pvrusb2-wm8775.o \
+		   $(obj-pvrusb2-dvb-y) \
 		   $(obj-pvrusb2-sysfs-y) $(obj-pvrusb2-debugifc-y)
 
 obj-$(CONFIG_VIDEO_PVRUSB2) += pvrusb2.o
+
+EXTRA_CFLAGS += -Idrivers/media/video
+EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
+EXTRA_CFLAGS += -Idrivers/media/dvb/frontends

drivers/media/video/pvrusb2/pvrusb2-devattr.h

@@ -23,6 +23,7 @@
 
 #include <linux/mod_devicetable.h>
 #include <linux/videodev2.h>
+#include "pvrusb2-dvb.h"
 
 /*
 
@@ -65,6 +66,9 @@ struct pvr2_device_desc {
 	   was initialized from internal ROM. */
 	struct pvr2_string_table fx2_firmware;
 
+	/* callback functions to handle attachment of digital tuner & demod */
+	struct pvr2_dvb_props *dvb_props;
+
 	/* Initial standard bits to use for this device, if not zero.
 	   Anything set here is also implied as an available standard.
 	   Note: This is ignored if overridden on the module load line via

drivers/media/video/pvrusb2/pvrusb2-dvb.c

+/*
+ *  pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver.
+ *
+ *  Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
+ *
+ *  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
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "dvbdev.h"
+#include "pvrusb2-hdw-internal.h"
+#include "pvrusb2-hdw.h"
+#include "pvrusb2-dvb.h"
+
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
+static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
+{
+	printk(KERN_DEBUG "start pid: 0x%04x, feedtype: %d\n",
+	       dvbdmxfeed->pid, dvbdmxfeed->type);
+	return 0; /* FIXME: pvr2_dvb_ctrl_feed(dvbdmxfeed, 1); */
+}
+
+static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
+{
+	printk(KERN_DEBUG "stop pid: 0x%04x, feedtype: %d\n",
+	       dvbdmxfeed->pid, dvbdmxfeed->type);
+	return 0; /* FIXME: pvr2_dvb_ctrl_feed(dvbdmxfeed, 0); */
+}
+
+static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap)
+{
+	int ret;
+
+	ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb",
+				   THIS_MODULE/*&hdw->usb_dev->owner*/,
+				   &adap->pvr->hdw->usb_dev->dev,
+				   adapter_nr);
+	if (ret < 0) {
+		err("dvb_register_adapter failed: error %d", ret);
+		goto err;
+	}
+	adap->dvb_adap.priv = adap;
+
+	adap->demux.dmx.capabilities = DMX_TS_FILTERING |
+				       DMX_SECTION_FILTERING |
+				       DMX_MEMORY_BASED_FILTERING;
+	adap->demux.priv             = adap;
+	adap->demux.filternum        = 256;
+	adap->demux.feednum          = 256;
+	adap->demux.start_feed       = pvr2_dvb_start_feed;
+	adap->demux.stop_feed        = pvr2_dvb_stop_feed;
+	adap->demux.write_to_decoder = NULL;
+
+	ret = dvb_dmx_init(&adap->demux);
+	if (ret < 0) {
+		err("dvb_dmx_init failed: error %d", ret);
+		goto err_dmx;
+	}
+
+	adap->dmxdev.filternum       = adap->demux.filternum;
+	adap->dmxdev.demux           = &adap->demux.dmx;
+	adap->dmxdev.capabilities    = 0;
+
+	ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
+	if (ret < 0) {
+		err("dvb_dmxdev_init failed: error %d", ret);
+		goto err_dmx_dev;
+	}
+
+	dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
+
+	adap->digital_up = 1;
+
+	return 0;
+
+err_dmx_dev:
+	dvb_dmx_release(&adap->demux);
+err_dmx:
+	dvb_unregister_adapter(&adap->dvb_adap);
+err:
+	return ret;
+}
+
+static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap)
+{
+	if (adap->digital_up) {
+		printk(KERN_DEBUG "unregistering DVB devices\n");
+		dvb_net_release(&adap->dvb_net);
+		adap->demux.dmx.close(&adap->demux.dmx);
+		dvb_dmxdev_release(&adap->dmxdev);
+		dvb_dmx_release(&adap->demux);
+		dvb_unregister_adapter(&adap->dvb_adap);
+		adap->digital_up = 0;
+	}
+	return 0;
+}
+
+static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
+{
+	struct pvr2_dvb_props *dvb_props = adap->pvr->hdw->hdw_desc->dvb_props;
+
+	if (dvb_props == NULL) {
+		err("fe_props not defined!");
+		return -EINVAL;
+	}
+
+	if (dvb_props->frontend_attach == NULL) {
+		err("frontend_attach not defined!");
+		return -EINVAL;
+	}
+
+	if ((dvb_props->frontend_attach(adap) == 0) && (adap->fe)) {
+
+		if (dvb_register_frontend(&adap->dvb_adap, adap->fe)) {
+			err("frontend registration failed!");
+			dvb_frontend_detach(adap->fe);
+			adap->fe = NULL;
+			return -ENODEV;
+		}
+
+		if (dvb_props->tuner_attach)
+			dvb_props->tuner_attach(adap);
+
+		if (adap->fe->ops.analog_ops.standby)
+			adap->fe->ops.analog_ops.standby(adap->fe);
+
+	} else {
+		err("no frontend was attached!");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
+{
+	if (adap->fe != NULL) {
+		dvb_unregister_frontend(adap->fe);
+		dvb_frontend_detach(adap->fe);
+	}
+	return 0;
+}
+
+int pvr2_dvb_init(struct pvr2_context *pvr)
+{
+	int ret = 0;
+
+	pvr->hdw->dvb.pvr = pvr;
+
+	ret = pvr2_dvb_adapter_init(&pvr->hdw->dvb);
+	if (ret < 0)
+		goto fail;
+
+	ret = pvr2_dvb_frontend_init(&pvr->hdw->dvb);
+fail:
+	return ret;
+}
+
+int pvr2_dvb_exit(struct pvr2_context *pvr)
+{
+	pvr2_dvb_frontend_exit(&pvr->hdw->dvb);
+	pvr2_dvb_adapter_exit(&pvr->hdw->dvb);
+
+	pvr->hdw->dvb.pvr = NULL;
+
+	return 0;
+}

drivers/media/video/pvrusb2/pvrusb2-dvb.h

+#ifndef __PVRUSB2_DVB_H__
+#define __PVRUSB2_DVB_H__
+
+#include "dvb_frontend.h"
+#include "dvb_demux.h"
+#include "dvb_net.h"
+#include "dmxdev.h"
+#include "pvrusb2-context.h"
+
+struct pvr2_dvb_adapter {
+	struct pvr2_context	*pvr;
+
+	struct dvb_adapter	dvb_adap;
+	struct dmxdev		dmxdev;
+	struct dvb_demux	demux;
+	struct dvb_net		dvb_net;
+	struct dvb_frontend	*fe;
+
+	int			feedcount;
+	int			max_feed_count;
+
+	unsigned int		digital_up:1;
+};
+
+struct pvr2_dvb_props {
+	int (*frontend_attach) (struct pvr2_dvb_adapter *);
+	int (*tuner_attach) (struct pvr2_dvb_adapter *);
+};
+
+int pvr2_dvb_init(struct pvr2_context *pvr);
+int pvr2_dvb_exit(struct pvr2_context *pvr);
+
+#endif /* __PVRUSB2_DVB_H__ */

drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h

@@ -41,6 +41,7 @@
 #include "pvrusb2-io.h"
 #include <media/cx2341x.h>
 #include "pvrusb2-devattr.h"
+#include "pvrusb2-dvb.h"
 
 /* Legal values for PVR2_CID_HSM */
 #define PVR2_CVAL_HSM_FAIL 0
@@ -373,6 +374,8 @@ struct pvr2_hdw {
 
 	struct pvr2_ctrl *controls;
 	unsigned int control_cnt;
+
+	struct pvr2_dvb_adapter dvb;
 };
 
 /* This function gets the current frequency */

drivers/media/video/pvrusb2/pvrusb2-main.c

@@ -60,6 +60,10 @@ static void pvr_setup_attach(struct pvr2_context *pvr)
 {
 	/* Create association with v4l layer */
 	pvr2_v4l2_create(pvr);
+#ifdef CONFIG_VIDEO_PVRUSB2_DVB
+	/* Create association with dvb layer */
+	pvr2_dvb_init(pvr);
+#endif
 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
 	pvr2_sysfs_create(pvr,class_ptr);
 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
@@ -95,6 +99,9 @@ static void pvr_disconnect(struct usb_interface *intf)
 
 	pvr2_trace(PVR2_TRACE_INIT,"pvr_disconnect(pvr=%p) BEGIN",pvr);
 
+#ifdef CONFIG_VIDEO_PVRUSB2_DVB
+	pvr2_dvb_exit(pvr);
+#endif
 	usb_set_intfdata (intf, NULL);
 	pvr2_context_disconnect(pvr);