Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / comedi / drivers / rti802.c

diff --git a/kernel/drivers/staging/comedi/drivers/rti802.c b/kernel/drivers/staging/comedi/drivers/rti802.c
new file mode 100644 (file)
index 0000000..6db58fc
--- /dev/null
+++ b/kernel/drivers/staging/comedi/drivers/rti802.c
@@ -0,0 +1,129 @@
+/*
+ * rti802.c
+ * Comedi driver for Analog Devices RTI-802 board
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * Driver: rti802
+ * Description: Analog Devices RTI-802
+ * Author: Anders Blomdell <anders.blomdell@control.lth.se>
+ * Devices: [Analog Devices] RTI-802 (rti802)
+ * Status: works
+ *
+ * Configuration Options:
+ *   [0] - i/o base
+ *   [1] - unused
+ *   [2,4,6,8,10,12,14,16] - dac#[0-7]  0=two's comp, 1=straight
+ *   [3,5,7,9,11,13,15,17] - dac#[0-7]  0=bipolar, 1=unipolar
+ */
+
+#include <linux/module.h>
+#include "../comedidev.h"
+
+/*
+ * Register I/O map
+ */
+#define RTI802_SELECT          0x00
+#define RTI802_DATALOW         0x01
+#define RTI802_DATAHIGH                0x02
+
+struct rti802_private {
+       enum {
+               dac_2comp, dac_straight
+       } dac_coding[8];
+       const struct comedi_lrange *range_type_list[8];
+};
+
+static int rti802_ao_insn_write(struct comedi_device *dev,
+                               struct comedi_subdevice *s,
+                               struct comedi_insn *insn,
+                               unsigned int *data)
+{
+       struct rti802_private *devpriv = dev->private;
+       unsigned int chan = CR_CHAN(insn->chanspec);
+       int i;
+
+       outb(chan, dev->iobase + RTI802_SELECT);
+
+       for (i = 0; i < insn->n; i++) {
+               unsigned int val = data[i];
+
+               s->readback[chan] = val;
+
+               /* munge offset binary to two's complement if needed */
+               if (devpriv->dac_coding[chan] == dac_2comp)
+                       val = comedi_offset_munge(s, val);
+
+               outb(val & 0xff, dev->iobase + RTI802_DATALOW);
+               outb((val >> 8) & 0xff, dev->iobase + RTI802_DATAHIGH);
+       }
+
+       return insn->n;
+}
+
+static int rti802_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+       struct rti802_private *devpriv;
+       struct comedi_subdevice *s;
+       int i;
+       int ret;
+
+       ret = comedi_request_region(dev, it->options[0], 0x04);
+       if (ret)
+               return ret;
+
+       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+       if (!devpriv)
+               return -ENOMEM;
+
+       ret = comedi_alloc_subdevices(dev, 1);
+       if (ret)
+               return ret;
+
+       /* Analog Output subdevice */
+       s = &dev->subdevices[0];
+       s->type         = COMEDI_SUBD_AO;
+       s->subdev_flags = SDF_WRITABLE;
+       s->maxdata      = 0xfff;
+       s->n_chan       = 8;
+       s->insn_write   = rti802_ao_insn_write;
+
+       ret = comedi_alloc_subdev_readback(s);
+       if (ret)
+               return ret;
+
+       s->range_table_list = devpriv->range_type_list;
+       for (i = 0; i < 8; i++) {
+               devpriv->dac_coding[i] = (it->options[3 + 2 * i])
+                       ? (dac_straight) : (dac_2comp);
+               devpriv->range_type_list[i] = (it->options[2 + 2 * i])
+                       ? &range_unipolar10 : &range_bipolar10;
+       }
+
+       return 0;
+}
+
+static struct comedi_driver rti802_driver = {
+       .driver_name    = "rti802",
+       .module         = THIS_MODULE,
+       .attach         = rti802_attach,
+       .detach         = comedi_legacy_detach,
+};
+module_comedi_driver(rti802_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi driver for Analog Devices RTI-802 board");
+MODULE_LICENSE("GPL");