V4L/DVB (4228a): pvrusb2 to kernel 2.6.18

Implement V4L2 driver for the Hauppauge PVR USB2 TV tuner.

The Hauppauge PVR USB2 is a USB connected TV tuner with an embedded
cx23416 hardware MPEG2 encoder.  There are two major variants of this
device; this driver handles both.  Any V4L2 application which
understands MPEG2 video stream data should be able to work with this
device.

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

1 files changed, 204 insertions, 0 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-audio.c b/drivers/media/video/pvrusb2/pvrusb2-audio.c
new file mode 100644
index 000000000000..313d2dcf9e4b
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-audio.c
@@ -0,0 +1,204 @@
+/*
+ *
+ *  $Id$
+ *
+ *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
+ *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
+ *
+ *  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 "pvrusb2-audio.h"
+#include "pvrusb2-hdw-internal.h"
+#include "pvrusb2-debug.h"
+#include <linux/videodev2.h>
+#include <media/msp3400.h>
+#include <media/v4l2-common.h>
+
+struct pvr2_msp3400_handler {
+        struct pvr2_hdw *hdw;
+        struct pvr2_i2c_client *client;
+        struct pvr2_i2c_handler i2c_handler;
+        struct pvr2_audio_stat astat;
+        unsigned long stale_mask;
+};
+
+
+/* This function selects the correct audio input source */
+static void set_stereo(struct pvr2_msp3400_handler *ctxt)
+{
+        struct pvr2_hdw *hdw = ctxt->hdw;
+        struct v4l2_routing route;
+
+        pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
+
+        if (hdw->input_val == PVR2_CVAL_INPUT_TV) {
+                struct v4l2_tuner vt;
+                memset(&vt,0,sizeof(vt));
+                vt.audmode = hdw->audiomode_val;
+                pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_TUNER,&vt);
+        }
+
+        route.input = MSP_INPUT_DEFAULT;
+        route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
+        switch (hdw->input_val) {
+        case PVR2_CVAL_INPUT_TV:
+                break;
+        case PVR2_CVAL_INPUT_RADIO:
+                /* Assume that msp34xx also handle FM decoding, in which case
+                   we're still using the tuner. */
+                /* HV: actually it is more likely to be the SCART2 input if
+                   the ivtv experience is any indication. */
+                route.input = MSP_INPUT(MSP_IN_SCART2, MSP_IN_TUNER1,
+                                    MSP_DSP_IN_SCART, MSP_DSP_IN_SCART);
+                break;
+        case PVR2_CVAL_INPUT_SVIDEO:
+        case PVR2_CVAL_INPUT_COMPOSITE:
+                /* SCART 1 input */
+                route.input = MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1,
+                                    MSP_DSP_IN_SCART, MSP_DSP_IN_SCART);
+                break;
+        }
+        pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
+}
+
+
+static int check_stereo(struct pvr2_msp3400_handler *ctxt)
+{
+        struct pvr2_hdw *hdw = ctxt->hdw;
+        return (hdw->input_dirty ||
+                hdw->audiomode_dirty);
+}
+
+
+struct pvr2_msp3400_ops {
+        void (*update)(struct pvr2_msp3400_handler *);
+        int (*check)(struct pvr2_msp3400_handler *);
+};
+
+
+static const struct pvr2_msp3400_ops msp3400_ops[] = {
+        { .update = set_stereo, .check = check_stereo},
+};
+
+
+static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
+{
+        unsigned long msk;
+        unsigned int idx;
+
+        for (idx = 0; idx < sizeof(msp3400_ops)/sizeof(msp3400_ops[0]);
+             idx++) {
+                msk = 1 << idx;
+                if (ctxt->stale_mask & msk) continue;
+                if (msp3400_ops[idx].check(ctxt)) {
+                        ctxt->stale_mask |= msk;
+                }
+        }
+        return ctxt->stale_mask != 0;
+}
+
+
+static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
+{
+        unsigned long msk;
+        unsigned int idx;
+
+        for (idx = 0; idx < sizeof(msp3400_ops)/sizeof(msp3400_ops[0]);
+             idx++) {
+                msk = 1 << idx;
+                if (!(ctxt->stale_mask & msk)) continue;
+                ctxt->stale_mask &= ~msk;
+                msp3400_ops[idx].update(ctxt);
+        }
+}
+
+
+/* This reads back the current signal type */
+static int get_audio_status(struct pvr2_msp3400_handler *ctxt)
+{
+        struct v4l2_tuner vt;
+        int stat;
+
+        memset(&vt,0,sizeof(vt));
+        stat = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_G_TUNER,&vt);
+        if (stat < 0) return stat;
+
+        ctxt->hdw->flag_stereo = (vt.audmode & V4L2_TUNER_MODE_STEREO) != 0;
+        ctxt->hdw->flag_bilingual =
+                (vt.audmode & V4L2_TUNER_MODE_LANG2) != 0;
+        return 0;
+}
+
+
+static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
+{
+        ctxt->client->handler = 0;
+        ctxt->hdw->audio_stat = 0;
+        kfree(ctxt);
+}
+
+
+static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
+                                          char *buf,unsigned int cnt)
+{
+        return scnprintf(buf,cnt,"handler: pvrusb2-audio v4l2");
+}
+
+
+const static struct pvr2_i2c_handler_functions msp3400_funcs = {
+        .detach = (void (*)(void *))pvr2_msp3400_detach,
+        .check = (int (*)(void *))msp3400_check,
+        .update = (void (*)(void *))msp3400_update,
+        .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
+};
+
+
+int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
+{
+        struct pvr2_msp3400_handler *ctxt;
+        if (hdw->audio_stat) return 0;
+        if (cp->handler) return 0;
+
+        ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
+        if (!ctxt) return 0;
+        memset(ctxt,0,sizeof(*ctxt));
+
+        ctxt->i2c_handler.func_data = ctxt;
+        ctxt->i2c_handler.func_table = &msp3400_funcs;
+        ctxt->client = cp;
+        ctxt->hdw = hdw;
+        ctxt->astat.ctxt = ctxt;
+        ctxt->astat.status = (int (*)(void *))get_audio_status;
+        ctxt->astat.detach = (void (*)(void *))pvr2_msp3400_detach;
+        ctxt->stale_mask = (1 << (sizeof(msp3400_ops)/
+                                  sizeof(msp3400_ops[0]))) - 1;
+        cp->handler = &ctxt->i2c_handler;
+        hdw->audio_stat = &ctxt->astat;
+        pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L2 handler set up",
+                   cp->client->addr);
+        return !0;
+}
+
+
+/*
+  Stuff for Emacs to see, in order to encourage consistent editing style:
+  *** Local Variables: ***
+  *** mode: c ***
+  *** fill-column: 70 ***
+  *** tab-width: 8 ***
+  *** c-basic-offset: 8 ***
+  *** End: ***
+  */