From: Ian Abbott <abbotti@mev.co.uk>
Date: Thu, 15 Dec 2011 20:08:16 +0000 (+0000)
Subject: dt2801: do INSN_CONFIG properly for DIO subdevice
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=a18dbb356c974c1a9d84ccc69d3c0a3e80209664;p=comedi.git

dt2801: do INSN_CONFIG properly for DIO subdevice

Handle INSN_CONFIG_DIO_INPUT, INSN_CONFIG_DIO_OUTPUT and
INSN_CONFIG_DIO_QUERY in data[0].

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
---

diff --git a/comedi/drivers/dt2801.c b/comedi/drivers/dt2801.c
index b39550e0..c74c5438 100644
--- a/comedi/drivers/dt2801.c
+++ b/comedi/drivers/dt2801.c
@@ -686,12 +686,20 @@ static int dt2801_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
 		which = 1;
 
 	/* configure */
-	if (data[0]) {
+	switch (data[0]) {
+	case INSN_CONFIG_DIO_OUTPUT:
 		s->io_bits = 0xff;
 		dt2801_writecmd(dev, DT_C_SET_DIGOUT);
-	} else {
+		break;
+	case INSN_CONFIG_DIO_INPUT:
 		s->io_bits = 0;
 		dt2801_writecmd(dev, DT_C_SET_DIGIN);
+		break;
+	case INSN_CONFIG_DIO_QUERY:
+		data[1] = s->io_bits ? COMEDI_OUTPUT : COMEDI_INPUT;
+		return insn->n;
+	default:
+		return -EINVAL;
 	}
 	dt2801_writedata(dev, which);