From 810a97f2e2663abe05a4bdc13d58922fe1094947 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Fri, 8 Jun 2001 22:33:44 +0000
Subject: [PATCH] Added internal trigger support

---
 comedi/comedi_fops.c      | 22 +++++++++++++++++++++-
 include/linux/comedi.h    |  3 +--
 include/linux/comedidev.h |  4 ++++
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index 24e65adb..6662e26e 100644
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -593,6 +593,11 @@ static int do_insnlist_ioctl(comedi_device *dev,void *arg,void *file)
 			{
 				struct timeval tv;
 
+				if(insn.n!=2){
+					ret=-EINVAL;
+					goto error;
+				}
+
 				do_gettimeofday(&tv);
 				data[0]=tv.tv_sec;
 				data[1]=tv.tv_usec;
@@ -601,14 +606,29 @@ static int do_insnlist_ioctl(comedi_device *dev,void *arg,void *file)
 				break;
 			}
 			case INSN_WAIT:
-				if(insn.n<1 || data[0]>=100000){
+				if(insn.n!=1 || data[0]>=100000){
 					ret=-EINVAL;
 					break;
 				}
 				udelay(data[0]/1000);
 				ret=1;
 				break;
+			case INSN_INTTRIG:
+				if(insn.subdev>=dev->n_subdevices){
+					DPRINTK("%d not useable subdevice\n",insn.subdev);
+					ret=-EINVAL;
+					goto error;
+				}
+				s=dev->subdevices+insn.subdev;
+				if(!s->async || !s->async->inttrig){
+					DPRINTK("no async or no inttrig\n");
+					ret=-EINVAL;
+					goto error;
+				}
+				ret = s->async->inttrig(dev,s,0);
+				break;
 			default:
+				DPRINTK("invalid insn\n");
 				ret=-EINVAL;
 			}
 		}else{
diff --git a/include/linux/comedi.h b/include/linux/comedi.h
index 95e61700..a5175cfa 100644
--- a/include/linux/comedi.h
+++ b/include/linux/comedi.h
@@ -97,6 +97,7 @@ typedef unsigned short sampl_t;
 #define INSN_CONFIG		( 3 | INSN_MASK_READ|INSN_MASK_WRITE)
 #define INSN_GTOD		( 4 | INSN_MASK_READ|INSN_MASK_SPECIAL)
 #define INSN_WAIT		( 5 | INSN_MASK_WRITE|INSN_MASK_SPECIAL)
+#define INSN_INTTRIG		( 6 | INSN_MASK_WRITE|INSN_MASK_SPECIAL)
 
 /* trigger flags */
 
@@ -126,8 +127,6 @@ typedef unsigned short sampl_t;
 #define TRIG_EXT	0x00000040	/* trigger on external signal N */
 #define TRIG_INT	0x00000080	/* trigger on comedi-internal signal N */
 
-#define TRIG_INVAL	0x00000100	/* choice was invalid */
-
 /* subdevice flags */
 
 #define SDF_BUSY	0x0001		/* device is busy */
diff --git a/include/linux/comedidev.h b/include/linux/comedidev.h
index dd58094b..cc8aecd8 100644
--- a/include/linux/comedidev.h
+++ b/include/linux/comedidev.h
@@ -103,6 +103,8 @@ struct comedi_subdevice_struct{
 	int (*do_lock)(comedi_device *,comedi_subdevice *);
 	int (*do_unlock)(comedi_device *,comedi_subdevice *);
 
+	int (*buf_change)(comedi_device *,comedi_subdevice *s);
+
 	unsigned int state;
 };
 
@@ -130,6 +132,8 @@ struct comedi_async_struct{
 	unsigned int cb_mask;
 	int (*cb_func)(unsigned int flags,void *);
 	void *cb_arg;
+
+	int (*inttrig)(comedi_device *dev,comedi_subdevice *s,unsigned int x);
 };
 
 struct comedi_driver_struct{
-- 
2.26.2