---

yaml
---
r: 337231
b: refs/heads/master
c: 57054dc
h: refs/heads/master
i:
  337229: a66a4a9
  337227: a7d1fc9
  337223: 91e941b
  337215: cf01e63
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 155857cd5488d6287724ad560f063e568a077940
+refs/heads/master: 57054dcaec4848d5f6ce2fddaebfd0fc110e0c53

trunk/drivers/staging/comedi/drivers/amplc_dio200.c

@@ -207,7 +207,6 @@
 #include "../comedidev.h"
 
 #include "comedi_fc.h"
-#include "8255.h"
 #include "8253.h"
 
 #define DIO200_DRIVER_NAME	"amplc_dio200"
@@ -221,6 +220,15 @@
 #define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
 #define PCI_DEVICE_ID_INVALID 0xffff
 
+/* 8255 control register bits */
+#define CR_C_LO_IO	0x01
+#define CR_B_IO		0x02
+#define CR_B_MODE	0x04
+#define CR_C_HI_IO	0x08
+#define CR_A_IO		0x10
+#define CR_A_MODE(a)	((a)<<5)
+#define CR_CW		0x80
+
 /* 200 series registers */
 #define DIO200_IO_SIZE		0x20
 #define DIO200_XCLK_SCE		0x18	/* Group X clock selection register */
@@ -430,6 +438,10 @@ struct dio200_subdev_8254 {
 	spinlock_t spinlock;
 };
 
+struct dio200_subdev_8255 {
+	unsigned int ofs;		/* DIO base offset */
+};
+
 struct dio200_subdev_intr {
 	unsigned int ofs;
 	spinlock_t spinlock;
@@ -1245,6 +1257,133 @@ dio200_subdev_8254_cleanup(struct comedi_device *dev,
 	kfree(subpriv);
 }
 
+/*
+ * This function sets I/O directions for an '8255' DIO subdevice.
+ */
+static void dio200_subdev_8255_set_dir(struct comedi_device *dev,
+				       struct comedi_subdevice *s)
+{
+	struct dio200_subdev_8255 *subpriv = s->private;
+	int config;
+
+	config = CR_CW;
+	/* 1 in io_bits indicates output, 1 in config indicates input */
+	if (!(s->io_bits & 0x0000ff))
+		config |= CR_A_IO;
+	if (!(s->io_bits & 0x00ff00))
+		config |= CR_B_IO;
+	if (!(s->io_bits & 0x0f0000))
+		config |= CR_C_LO_IO;
+	if (!(s->io_bits & 0xf00000))
+		config |= CR_C_HI_IO;
+	outb(config, dev->iobase + subpriv->ofs + 3);
+}
+
+/*
+ * Handle 'insn_bits' for an '8255' DIO subdevice.
+ */
+static int dio200_subdev_8255_bits(struct comedi_device *dev,
+				   struct comedi_subdevice *s,
+				   struct comedi_insn *insn, unsigned int *data)
+{
+	struct dio200_subdev_8255 *subpriv = s->private;
+
+	if (data[0]) {
+		s->state &= ~data[0];
+		s->state |= (data[0] & data[1]);
+		if (data[0] & 0xff)
+			outb(s->state & 0xff, dev->iobase + subpriv->ofs);
+		if (data[0] & 0xff00)
+			outb((s->state >> 8) & 0xff,
+			     dev->iobase + subpriv->ofs + 1);
+		if (data[0] & 0xff0000)
+			outb((s->state >> 16) & 0xff,
+			     dev->iobase + subpriv->ofs + 2);
+	}
+	data[1] = inb(dev->iobase + subpriv->ofs);
+	data[1] |= inb(dev->iobase + subpriv->ofs + 1) << 8;
+	data[1] |= inb(dev->iobase + subpriv->ofs + 2) << 16;
+	return 2;
+}
+
+/*
+ * Handle 'insn_config' for an '8255' DIO subdevice.
+ */
+static int dio200_subdev_8255_config(struct comedi_device *dev,
+				     struct comedi_subdevice *s,
+				     struct comedi_insn *insn,
+				     unsigned int *data)
+{
+	unsigned int mask;
+	unsigned int bits;
+
+	mask = 1 << CR_CHAN(insn->chanspec);
+	if (mask & 0x0000ff)
+		bits = 0x0000ff;
+	else if (mask & 0x00ff00)
+		bits = 0x00ff00;
+	else if (mask & 0x0f0000)
+		bits = 0x0f0000;
+	else
+		bits = 0xf00000;
+	switch (data[0]) {
+	case INSN_CONFIG_DIO_INPUT:
+		s->io_bits &= ~bits;
+		break;
+	case INSN_CONFIG_DIO_OUTPUT:
+		s->io_bits |= bits;
+		break;
+	case INSN_CONFIG_DIO_QUERY:
+		data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
+		return insn->n;
+		break;
+	default:
+		return -EINVAL;
+	}
+	dio200_subdev_8255_set_dir(dev, s);
+	return 1;
+}
+
+/*
+ * This function initializes an '8255' DIO subdevice.
+ *
+ * offset is the offset to the 8255 chip.
+ */
+static int dio200_subdev_8255_init(struct comedi_device *dev,
+				   struct comedi_subdevice *s,
+				   unsigned int offset)
+{
+	struct dio200_subdev_8255 *subpriv;
+
+	subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
+	if (!subpriv)
+		return -ENOMEM;
+	subpriv->ofs = offset;
+	s->private = subpriv;
+	s->type = COMEDI_SUBD_DIO;
+	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+	s->n_chan = 24;
+	s->range_table = &range_digital;
+	s->maxdata = 1;
+	s->insn_bits = dio200_subdev_8255_bits;
+	s->insn_config = dio200_subdev_8255_config;
+	s->state = 0;
+	s->io_bits = 0;
+	dio200_subdev_8255_set_dir(dev, s);
+	return 0;
+}
+
+/*
+ * This function cleans up an '8255' DIO subdevice.
+ */
+static void dio200_subdev_8255_cleanup(struct comedi_device *dev,
+				       struct comedi_subdevice *s)
+{
+	struct dio200_subdev_8255 *subpriv = s->private;
+
+	kfree(subpriv);
+}
+
 static void dio200_report_attach(struct comedi_device *dev, unsigned int irq)
 {
 	const struct dio200_board *thisboard = comedi_board(dev);
@@ -1301,8 +1440,8 @@ static int dio200_common_attach(struct comedi_device *dev, unsigned long iobase,
 			break;
 		case sd_8255:
 			/* digital i/o subdevice (8255) */
-			ret = subdev_8255_init(dev, s, NULL,
-					       iobase + layout->sdinfo[n]);
+			ret = dio200_subdev_8255_init(dev, s,
+						      layout->sdinfo[n]);
 			if (ret < 0)
 				return ret;
 			break;
@@ -1438,7 +1577,7 @@ static void dio200_detach(struct comedi_device *dev)
 				dio200_subdev_8254_cleanup(dev, s);
 				break;
 			case sd_8255:
-				subdev_8255_cleanup(dev, s);
+				dio200_subdev_8255_cleanup(dev, s);
 				break;
 			case sd_intr:
 				dio200_subdev_intr_cleanup(dev, s);