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>

6 files changed, 232 insertions, 0 deletions

diff --git a/drivers/media/video/pvrusb2/Makefile b/drivers/media/video/pvrusb2/Makefile
index 47284e55864..b0fa3ece5aa 100644
--- a/drivers/media/video/pvrusb2/Makefile
+++ b/drivers/media/video/pvrusb2/Makefile
@@ -1,5 +1,6 @@
 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
diff --git a/drivers/media/video/pvrusb2/pvrusb2-devattr.h b/drivers/media/video/pvrusb2/pvrusb2-devattr.h
index fb5f5d17e8c..cc2c4d78cf4 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-devattr.h
+++ b/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
diff --git a/drivers/media/video/pvrusb2/pvrusb2-dvb.c b/drivers/media/video/pvrusb2/pvrusb2-dvb.c
new file mode 100644
index 00000000000..18c18db2fe3
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-dvb.c
@@ -0,0 +1,179 @@
+/*
+ *  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;
+}
diff --git a/drivers/media/video/pvrusb2/pvrusb2-dvb.h b/drivers/media/video/pvrusb2/pvrusb2-dvb.h
new file mode 100644
index 00000000000..0aff05cb941
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-dvb.h
@@ -0,0 +1,33 @@
+#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__ */
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h b/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h
index c725495826c..6fe0a882209 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h
+++ b/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 */
diff --git a/drivers/media/video/pvrusb2/pvrusb2-main.c b/drivers/media/video/pvrusb2/pvrusb2-main.c
index b63b2265503..68f4a748073 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-main.c
+++ b/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);