1 files changed, 79 insertions, 444 deletions

diff --git a/drivers/staging/comedi/kcomedilib/kcomedilib_main.c b/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
index 288fef4fcbcc..863aae40edeb 100644
--- a/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
+++ b/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
@@ -31,7 +31,7 @@
 #include <linux/delay.h>
 #include <linux/ioport.h>
 #include <linux/mm.h>
-#include <asm/io.h>
+#include <linux/io.h>
 
 #include "../comedi.h"
 #include "../comedilib.h"
@@ -41,7 +41,7 @@ MODULE_AUTHOR("David Schleef <ds@schleef.org>");
 MODULE_DESCRIPTION("Comedi kernel library");
 MODULE_LICENSE("GPL");
 
-void *comedi_open(const char *filename)
+struct comedi_device *comedi_open(const char *filename)
 {
 	struct comedi_device_file_info *dev_file_info;
 	struct comedi_device *dev;
@@ -66,29 +66,11 @@ void *comedi_open(const char *filename)
 	if (!try_module_get(dev->driver->module))
 		return NULL;
 
-	return (void *)dev;
+	return dev;
 }
+EXPORT_SYMBOL(comedi_open);
 
-void *comedi_open_old(unsigned int minor)
-{
-	struct comedi_device_file_info *dev_file_info;
-	struct comedi_device *dev;
-
-	if (minor >= COMEDI_NUM_MINORS)
-		return NULL;
-
-	dev_file_info = comedi_get_device_file_info(minor);
-	if (dev_file_info == NULL)
-		return NULL;
-	dev = dev_file_info->device;
-
-	if (dev == NULL || !dev->attached)
-		return NULL;
-
-	return (void *)dev;
-}
-
-int comedi_close(void *d)
+int comedi_close(struct comedi_device *d)
 {
 	struct comedi_device *dev = (struct comedi_device *)d;
 
@@ -96,465 +78,118 @@ int comedi_close(void *d)
 
 	return 0;
 }
+EXPORT_SYMBOL(comedi_close);
 
-int comedi_loglevel(int newlevel)
-{
-	return 0;
-}
-
-void comedi_perror(const char *message)
-{
-	printk("%s: unknown error\n", message);
-}
-
-char *comedi_strerror(int err)
-{
-	return "unknown error";
-}
-
-int comedi_fileno(void *d)
+static int comedi_do_insn(struct comedi_device *dev, struct comedi_insn *insn)
 {
-	struct comedi_device *dev = (struct comedi_device *)d;
-
-	/* return something random */
-	return dev->minor;
-}
-
-int comedi_command(void *d, struct comedi_cmd *cmd)
-{
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-	struct comedi_async *async;
-	unsigned runflags;
-
-	if (cmd->subdev >= dev->n_subdevices)
-		return -ENODEV;
-
-	s = dev->subdevices + cmd->subdev;
-	if (s->type == COMEDI_SUBD_UNUSED)
-		return -EIO;
-
-	async = s->async;
-	if (async == NULL)
-		return -ENODEV;
-
-	if (s->busy)
-		return -EBUSY;
-	s->busy = d;
-
-	if (async->cb_mask & COMEDI_CB_EOS)
-		cmd->flags |= TRIG_WAKE_EOS;
-
-	async->cmd = *cmd;
-
-	runflags = SRF_RUNNING;
-
-	comedi_set_subdevice_runflags(s, ~0, runflags);
-
-	comedi_reset_async_buf(async);
-
-	return s->do_cmd(dev, s);
-}
-
-int comedi_command_test(void *d, struct comedi_cmd *cmd)
-{
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-
-	if (cmd->subdev >= dev->n_subdevices)
-		return -ENODEV;
-
-	s = dev->subdevices + cmd->subdev;
-	if (s->type == COMEDI_SUBD_UNUSED)
-		return -EIO;
-
-	if (s->async == NULL)
-		return -ENODEV;
-
-	return s->do_cmdtest(dev, s, cmd);
-}
-
-/*
- *	COMEDI_INSN
- *	perform an instruction
- */
-int comedi_do_insn(void *d, struct comedi_insn *insn)
-{
-	struct comedi_device *dev = (struct comedi_device *)d;
 	struct comedi_subdevice *s;
 	int ret = 0;
 
-	if (insn->insn & INSN_MASK_SPECIAL) {
-		switch (insn->insn) {
-		case INSN_GTOD:
-			{
-				struct timeval tv;
-
-				do_gettimeofday(&tv);
-				insn->data[0] = tv.tv_sec;
-				insn->data[1] = tv.tv_usec;
-				ret = 2;
-
-				break;
-			}
-		case INSN_WAIT:
-			/* XXX isn't the value supposed to be nanosecs? */
-			if (insn->n != 1 || insn->data[0] >= 100) {
-				ret = -EINVAL;
-				break;
-			}
-			udelay(insn->data[0]);
-			ret = 1;
-			break;
-		case INSN_INTTRIG:
-			if (insn->n != 1) {
-				ret = -EINVAL;
-				break;
-			}
-			if (insn->subdev >= dev->n_subdevices) {
-				printk("%d not usable subdevice\n",
-				       insn->subdev);
-				ret = -EINVAL;
-				break;
-			}
-			s = dev->subdevices + insn->subdev;
-			if (!s->async) {
-				printk("no async\n");
-				ret = -EINVAL;
-				break;
-			}
-			if (!s->async->inttrig) {
-				printk("no inttrig\n");
-				ret = -EAGAIN;
-				break;
-			}
-			ret = s->async->inttrig(dev, s, insn->data[0]);
-			if (ret >= 0)
-				ret = 1;
-			break;
-		default:
-			ret = -EINVAL;
-		}
-	} else {
-		/* a subdevice instruction */
-		if (insn->subdev >= dev->n_subdevices) {
-			ret = -EINVAL;
-			goto error;
-		}
-		s = dev->subdevices + insn->subdev;
-
-		if (s->type == COMEDI_SUBD_UNUSED) {
-			printk("%d not useable subdevice\n", insn->subdev);
-			ret = -EIO;
-			goto error;
-		}
-
-		/* XXX check lock */
-
-		ret = check_chanlist(s, 1, &insn->chanspec);
-		if (ret < 0) {
-			printk("bad chanspec\n");
-			ret = -EINVAL;
-			goto error;
-		}
-
-		if (s->busy) {
-			ret = -EBUSY;
-			goto error;
-		}
-		s->busy = d;
-
-		switch (insn->insn) {
-		case INSN_READ:
-			ret = s->insn_read(dev, s, insn, insn->data);
-			break;
-		case INSN_WRITE:
-			ret = s->insn_write(dev, s, insn, insn->data);
-			break;
-		case INSN_BITS:
-			ret = s->insn_bits(dev, s, insn, insn->data);
-			break;
-		case INSN_CONFIG:
-			/* XXX should check instruction length */
-			ret = s->insn_config(dev, s, insn, insn->data);
-			break;
-		default:
-			ret = -EINVAL;
-			break;
-		}
-
-		s->busy = NULL;
-	}
-	if (ret < 0)
-		goto error;
-#if 0
-	/* XXX do we want this? -- abbotti #if'ed it out for now. */
-	if (ret != insn->n) {
-		printk("BUG: result of insn != insn.n\n");
+	/* a subdevice instruction */
+	if (insn->subdev >= dev->n_subdevices) {
 		ret = -EINVAL;
 		goto error;
 	}
-#endif
-error:
-
-	return ret;
-}
-
-/*
-	COMEDI_LOCK
-	lock subdevice
-
-	arg:
-		subdevice number
-
-	reads:
-		none
-
-	writes:
-		none
-
-	necessary locking:
-	- ioctl/rt lock  (this type)
-	- lock while subdevice busy
-	- lock while subdevice being programmed
+	s = dev->subdevices + insn->subdev;
 
-*/
-int comedi_lock(void *d, unsigned int subdevice)
-{
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-	unsigned long flags;
-	int ret = 0;
-
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
-
-	s = dev->subdevices + subdevice;
-
-	spin_lock_irqsave(&s->spin_lock, flags);
-
-	if (s->busy) {
-		ret = -EBUSY;
-	} else {
-		if (s->lock) {
-			ret = -EBUSY;
-		} else {
-			s->lock = d;
-		}
+	if (s->type == COMEDI_SUBD_UNUSED) {
+		printk("%d not useable subdevice\n", insn->subdev);
+		ret = -EIO;
+		goto error;
 	}
 
-	spin_unlock_irqrestore(&s->spin_lock, flags);
-
-	return ret;
-}
+	/* XXX check lock */
 
-/*
-	COMEDI_UNLOCK
-	unlock subdevice
-
-	arg:
-		subdevice number
-
-	reads:
-		none
-
-	writes:
-		none
-
-*/
-int comedi_unlock(void *d, unsigned int subdevice)
-{
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-	unsigned long flags;
-	struct comedi_async *async;
-	int ret;
-
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
-
-	s = dev->subdevices + subdevice;
-
-	async = s->async;
-
-	spin_lock_irqsave(&s->spin_lock, flags);
+	ret = comedi_check_chanlist(s, 1, &insn->chanspec);
+	if (ret < 0) {
+		printk("bad chanspec\n");
+		ret = -EINVAL;
+		goto error;
+	}
 
 	if (s->busy) {
 		ret = -EBUSY;
-	} else if (s->lock && s->lock != (void *)d) {
-		ret = -EACCES;
-	} else {
-		s->lock = NULL;
-
-		if (async) {
-			async->cb_mask = 0;
-			async->cb_func = NULL;
-			async->cb_arg = NULL;
-		}
-
-		ret = 0;
+		goto error;
+	}
+	s->busy = dev;
+
+	switch (insn->insn) {
+	case INSN_BITS:
+		ret = s->insn_bits(dev, s, insn, insn->data);
+		break;
+	case INSN_CONFIG:
+		/* XXX should check instruction length */
+		ret = s->insn_config(dev, s, insn, insn->data);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
 	}
 
-	spin_unlock_irqrestore(&s->spin_lock, flags);
-
-	return ret;
-}
-
-/*
-	COMEDI_CANCEL
-	cancel acquisition ioctl
-
-	arg:
-		subdevice number
-
-	reads:
-		nothing
-
-	writes:
-		nothing
-
-*/
-int comedi_cancel(void *d, unsigned int subdevice)
-{
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-	int ret = 0;
-
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
-
-	s = dev->subdevices + subdevice;
-
-	if (s->lock && s->lock != d)
-		return -EACCES;
-
-#if 0
-	if (!s->busy)
-		return 0;
-
-	if (s->busy != d)
-		return -EBUSY;
-#endif
-
-	if (!s->cancel || !s->async)
-		return -EINVAL;
-
-	ret = s->cancel(dev, s);
-
-	if (ret)
-		return ret;
-
-	comedi_set_subdevice_runflags(s, SRF_RUNNING | SRF_RT, 0);
-	s->async->inttrig = NULL;
 	s->busy = NULL;
+error:
 
-	return 0;
+	return ret;
 }
 
-/*
-   registration of callback functions
- */
-int comedi_register_callback(void *d, unsigned int subdevice,
-			     unsigned int mask, int (*cb) (unsigned int,
-							   void *), void *arg)
+int comedi_dio_config(struct comedi_device *dev, unsigned int subdev,
+		      unsigned int chan, unsigned int io)
 {
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-	struct comedi_async *async;
-
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
-
-	s = dev->subdevices + subdevice;
-
-	async = s->async;
-	if (s->type == COMEDI_SUBD_UNUSED || !async)
-		return -EIO;
+	struct comedi_insn insn;
 
-	/* are we locked? (ioctl lock) */
-	if (s->lock && s->lock != d)
-		return -EACCES;
+	memset(&insn, 0, sizeof(insn));
+	insn.insn = INSN_CONFIG;
+	insn.n = 1;
+	insn.data = &io;
+	insn.subdev = subdev;
+	insn.chanspec = CR_PACK(chan, 0, 0);
 
-	/* are we busy? */
-	if (s->busy)
-		return -EBUSY;
-
-	if (!mask) {
-		async->cb_mask = 0;
-		async->cb_func = NULL;
-		async->cb_arg = NULL;
-	} else {
-		async->cb_mask = mask;
-		async->cb_func = cb;
-		async->cb_arg = arg;
-	}
-
-	return 0;
+	return comedi_do_insn(dev, &insn);
 }
+EXPORT_SYMBOL(comedi_dio_config);
 
-int comedi_poll(void *d, unsigned int subdevice)
+int comedi_dio_bitfield(struct comedi_device *dev, unsigned int subdev,
+			unsigned int mask, unsigned int *bits)
 {
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s = dev->subdevices;
-	struct comedi_async *async;
-
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
+	struct comedi_insn insn;
+	unsigned int data[2];
+	int ret;
 
-	s = dev->subdevices + subdevice;
+	memset(&insn, 0, sizeof(insn));
+	insn.insn = INSN_BITS;
+	insn.n = 2;
+	insn.data = data;
+	insn.subdev = subdev;
 
-	async = s->async;
-	if (s->type == COMEDI_SUBD_UNUSED || !async)
-		return -EIO;
+	data[0] = mask;
+	data[1] = *bits;
 
-	/* are we locked? (ioctl lock) */
-	if (s->lock && s->lock != d)
-		return -EACCES;
+	ret = comedi_do_insn(dev, &insn);
 
-	/* are we running? XXX wrong? */
-	if (!s->busy)
-		return -EIO;
+	*bits = data[1];
 
-	return s->poll(dev, s);
+	return ret;
 }
+EXPORT_SYMBOL(comedi_dio_bitfield);
 
-/* WARNING: not portable */
-int comedi_map(void *d, unsigned int subdevice, void *ptr)
+int comedi_find_subdevice_by_type(struct comedi_device *dev, int type,
+				  unsigned int subd)
 {
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
-
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
-
-	s = dev->subdevices + subdevice;
-
-	if (!s->async)
-		return -EINVAL;
-
-	if (ptr)
-		*((void **)ptr) = s->async->prealloc_buf;
-
-	/* XXX no reference counting */
+	if (subd > dev->n_subdevices)
+		return -ENODEV;
 
-	return 0;
+	for (; subd < dev->n_subdevices; subd++) {
+		if (dev->subdevices[subd].type == type)
+			return subd;
+	}
+	return -1;
 }
+EXPORT_SYMBOL(comedi_find_subdevice_by_type);
 
-/* WARNING: not portable */
-int comedi_unmap(void *d, unsigned int subdevice)
+int comedi_get_n_channels(struct comedi_device *dev, unsigned int subdevice)
 {
-	struct comedi_device *dev = (struct comedi_device *)d;
-	struct comedi_subdevice *s;
+	struct comedi_subdevice *s = dev->subdevices + subdevice;
 
-	if (subdevice >= dev->n_subdevices)
-		return -EINVAL;
-
-	s = dev->subdevices + subdevice;
-
-	if (!s->async)
-		return -EINVAL;
-
-	/* XXX no reference counting */
-
-	return 0;
+	return s->n_chan;
 }
+EXPORT_SYMBOL(comedi_get_n_channels);