From: David Schleef <ds@schleef.org>
Date: Sat, 11 Mar 2000 16:17:32 +0000 (+0000)
Subject: Added prototypes for kcomedilib functions in comedi.h, added
X-Git-Tag: r0_7_41~5
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=0e799ff86ac3c55fd1c43af8bff3812b7f4aaed2;p=comedi.git

Added prototypes for kcomedilib functions in comedi.h, added
comedi_open and comedi_close, removed conflict with comedi.
---

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index e8ab46bb..b6f1e0ac 100644
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -1261,7 +1261,7 @@ static loff_t comedi_lseek_v22(struct file *file,loff_t offset,int origin)
 	return file->f_pos=new_offset;
 }
 
-static int comedi_open(struct inode *inode,struct file *file)
+static int comedi_fop_open(struct inode *inode,struct file *file)
 {
 	kdev_t minor=MINOR(inode->i_rdev);
 	comedi_device *dev;
@@ -1352,7 +1352,7 @@ static void comedi_close_v20(struct inode *inode,struct file *file)
 }
 
 #define comedi_ioctl_v20 comedi_ioctl
-#define comedi_open_v20 comedi_open
+#define comedi_open_v20 comedi_fop_open
 
 static struct file_operations comedi_fops={
 	lseek		: comedi_lseek_v20,
@@ -1368,7 +1368,7 @@ static struct file_operations comedi_fops={
 #ifdef LINUX_V22
 
 #define comedi_ioctl_v22 comedi_ioctl
-#define comedi_open_v22 comedi_open
+#define comedi_open_v22 comedi_fop_open
 
 static struct file_operations comedi_fops={
 	llseek		: comedi_lseek_v22,
diff --git a/comedi/kcomedilib/kcomedilib_main.c b/comedi/kcomedilib/kcomedilib_main.c
index f20715e2..334acc19 100644
--- a/comedi/kcomedilib/kcomedilib_main.c
+++ b/comedi/kcomedilib/kcomedilib_main.c
@@ -67,6 +67,25 @@ static inline int minor_to_dev(unsigned int minor,comedi_device **dev)
 }
 
 
+int comedi_open(unsigned int minor)
+{
+	comedi_device *dev;
+
+	if(minor>=COMEDI_NDEVICES)
+		return -ENODEV;
+
+	dev=comedi_get_device_by_minor(minor);
+
+	if(!dev->attached)
+		return -ENODEV;
+
+	return minor;
+}
+
+void comedi_close(unsigned int minor)
+{
+}
+
 /*
    These functions are #if 0'd because they aren't appropriate
    inside RTLinux, at least, not in this form.  Interface needs
@@ -236,11 +255,13 @@ static int do_chaninfo_ioctl(comedi_device *dev,comedi_chaninfo *arg)
 
 	this function is too complicated
 */
+static int comedi_trig_ioctl_mode0(comedi_device *dev,comedi_subdevice *s,comedi_trig *it);
+static int comedi_trig_ioctl_modeN(comedi_device *dev,comedi_subdevice *s,comedi_trig *it);
 int comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it)
 {
 	comedi_device *dev;
 	comedi_subdevice *s;
-	int ret=0;
+	int ret;
 
 	if((ret=minor_to_dev(minor,&dev))<0)
 		return ret;
@@ -252,6 +273,68 @@ int comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it)
 	if(s->type==COMEDI_SUBD_UNUSED)
 		return -EIO;
 	
+	if(it->mode==0)
+		return comedi_trig_ioctl_mode0(dev,s,it);
+	
+	return comedi_trig_ioctl_modeN(dev,s,it);
+}
+
+static int comedi_trig_ioctl_mode0(comedi_device *dev,comedi_subdevice *s,comedi_trig *it)
+{
+	int ret=0;
+
+	/* are we locked? (ioctl lock) */
+	if(s->lock && s->lock!=&rtcomedi_lock_semaphore)
+		return -EACCES;
+
+	/* are we busy? */
+	if(s->busy)
+		return -EBUSY;
+	s->busy=(void *)&rtcomedi_lock_semaphore;
+
+	/* make sure channel/gain list isn't too long */
+	if(it->n_chan > s->len_chanlist){
+		ret = -EINVAL;
+		goto cleanup;
+	}
+	
+	/* make sure each element in channel/gain list is valid */
+	if((ret=check_chanlist(s,it->n_chan,it->chanlist))<0)
+		goto cleanup;
+	
+	if(it->data==NULL){
+		ret=-EINVAL;
+		goto cleanup;
+	}
+
+	if(!it->data_len){
+#if 0
+		ret=-EINVAL;
+		goto cleanup;
+#else
+		it->data_len=it->n_chan*it->n;
+		rt_printk("comedi: warning: trig->data_len not set\n");
+#endif
+	}
+
+	s->cur_trig=*it;
+	
+	ret=s->trig[0](dev,s,it);
+	
+	if(ret>it->n*it->n_chan){
+		rt_printk("comedi: (bug) trig returned too many samples\n");
+	}
+
+cleanup:
+	s->busy=NULL;
+
+	return ret;
+}
+
+static int comedi_trig_ioctl_modeN(comedi_device *dev,comedi_subdevice *s,comedi_trig *it)
+{
+	int ret=0;
+
 	/* is subdevice RT capable? (important!) */
 	if(!(s->subdev_flags&SDF_RT)){
 		ret=-EINVAL;
@@ -307,11 +390,6 @@ int comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it)
 	ret=s->trig[it->mode](dev,s,it);
 	
 	if(ret==0)return 0;
-	if(ret<0)goto cleanup;
-
-	if(ret>it->n*it->n_chan){
-		rt_printk("comedi: (bug) trig returned too many samples\n");
-	}
 
 cleanup:
 	s->busy=NULL;
diff --git a/include/comedi.h b/include/comedi.h
index 28e276cc..a3bdc6aa 100644
--- a/include/comedi.h
+++ b/include/comedi.h
@@ -282,14 +282,40 @@ struct comedi_devconfig_struct{
 
 /* exported functions */
 
-int comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it);
-int __comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it);
+/* these functions may not be called at real-time priority */
+
+int comedi_open(unsigned int minor);
+void comedi_close(unsigned int minor);
+
+/* these functions may be called at any priority, but may fail at
+   real-time priority */
+
 int comedi_lock_ioctl(unsigned int minor,unsigned int subdev);
 int comedi_unlock_ioctl(unsigned int minor,unsigned int subdev);
+
+/* these functions may be called at any priority, but you must hold
+   the lock for the subdevice */
+
 int comedi_cancel_ioctl(unsigned int minor,unsigned int subdev);
 int comedi_register_callback(unsigned int minor,unsigned int subdev,
 		unsigned int mask,int (*cb)(unsigned int,void *),void *arg);
 
+int comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it);
+int __comedi_trig_ioctl(unsigned int minor,unsigned int subdev,comedi_trig *it);
+int comedi_data_write(unsigned int dev,unsigned int subdev,unsigned int chan,
+	unsigned int range,unsigned int aref,lsampl_t data);
+int comedi_data_read(unsigned int dev,unsigned int subdev,unsigned int chan,
+	unsigned int range,unsigned int aref,lsampl_t *data);
+int comedi_dio_config(unsigned int dev,unsigned int subdev,unsigned int chan,
+	unsigned int io);
+int comedi_dio_read(unsigned int dev,unsigned int subdev,unsigned int chan,
+	unsigned int *val);
+int comedi_dio_write(unsigned int dev,unsigned int subdev,unsigned int chan,
+	unsigned int val);
+int comedi_dio_bitfield(unsigned int dev,unsigned int subdev,unsigned int mask,
+	unsigned int *bits);
+
+
 #endif