Staging: comedi: add fl212 driver
Driver for FL512 board
From: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/comedi/drivers/fl512.c b/drivers/staging/comedi/drivers/fl512.c
new file mode 100644
index 0000000..81c4730
--- /dev/null
+++ b/drivers/staging/comedi/drivers/fl512.c
@@ -0,0 +1,184 @@
+/*
+ comedi/drivers/fl512.c
+ Anders Gnistrup <ex18@kalman.iau.dtu.dk>
+*/
+
+/*
+Driver: fl512
+Description: unknown
+Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
+Devices: [unknown] FL512 (fl512)
+Status: unknown
+
+Digital I/O is not supported.
+
+Configuration options:
+ [0] - I/O port base address
+*/
+
+#define DEBUG 0
+
+#include "../comedidev.h"
+
+#include <linux/delay.h>
+#include <linux/ioport.h>
+
+#define FL512_SIZE 16 /* the size of the used memory */
+typedef struct {
+ sampl_t ao_readback[2];
+} fl512_private;
+#define devpriv ((fl512_private *) dev->private)
+
+static const comedi_lrange range_fl512 = { 4, {
+ BIP_RANGE(0.5),
+ BIP_RANGE(1),
+ BIP_RANGE(5),
+ BIP_RANGE(10),
+ UNI_RANGE(1),
+ UNI_RANGE(5),
+ UNI_RANGE(10),
+ }
+};
+
+static int fl512_attach(comedi_device * dev, comedi_devconfig * it);
+static int fl512_detach(comedi_device * dev);
+
+static comedi_driver driver_fl512 = {
+ driver_name:"fl512",
+ module:THIS_MODULE,
+ attach:fl512_attach,
+ detach:fl512_detach,
+};
+
+COMEDI_INITCLEANUP(driver_fl512);
+
+static int fl512_ai_insn(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);
+static int fl512_ao_insn(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);
+static int fl512_ao_insn_readback(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);
+
+/*
+ * fl512_ai_insn : this is the analog input function
+ */
+static int fl512_ai_insn(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+ int n;
+ unsigned int lo_byte, hi_byte;
+ char chan = CR_CHAN(insn->chanspec);
+ unsigned long iobase = dev->iobase;
+
+ for (n = 0; n < insn->n; n++) { /* sample n times on selected channel */
+ /* XXX probably can move next step out of for() loop -- will make
+ * AI a little bit faster. */
+ outb(chan, iobase + 2); /* select chan */
+ outb(0, iobase + 3); /* start conversion */
+ /* XXX should test "done" flag instead of delay */
+ comedi_udelay(30); /* sleep 30 usec */
+ lo_byte = inb(iobase + 2); /* low 8 byte */
+ hi_byte = inb(iobase + 3) & 0xf; /* high 4 bit and mask */
+ data[n] = lo_byte + (hi_byte << 8);
+ }
+ return n;
+}
+
+/*
+ * fl512_ao_insn : used to write to a DA port n times
+ */
+static int fl512_ao_insn(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+ int n;
+ int chan = CR_CHAN(insn->chanspec); /* get chan to write */
+ unsigned long iobase = dev->iobase; /* get base address */
+
+ for (n = 0; n < insn->n; n++) { /* write n data set */
+ outb(data[n] & 0x0ff, iobase + 4 + 2 * chan); /* write low byte */
+ outb((data[n] & 0xf00) >> 8, iobase + 4 + 2 * chan); /* write high byte */
+ inb(iobase + 4 + 2 * chan); /* trig */
+
+ devpriv->ao_readback[chan] = data[n];
+ }
+ return n;
+}
+
+/*
+ * fl512_ao_insn_readback : used to read previous values written to
+ * DA port
+ */
+static int fl512_ao_insn_readback(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+ int n;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (n = 0; n < insn->n; n++) {
+ data[n] = devpriv->ao_readback[chan];
+ }
+
+ return n;
+}
+
+/*
+ * start attach
+ */
+static int fl512_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ unsigned long iobase;
+ comedi_subdevice *s; /* pointer to the subdevice:
+ Analog in, Analog out, ( not made ->and Digital IO) */
+
+ iobase = it->options[0];
+ printk("comedi:%d fl512: 0x%04lx", dev->minor, iobase);
+ if (!request_region(iobase, FL512_SIZE, "fl512")) {
+ printk(" I/O port conflict\n");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+ dev->board_name = "fl512";
+ if (alloc_private(dev, sizeof(fl512_private)) < 0)
+ return -ENOMEM;
+
+#if DEBUG
+ printk("malloc ok\n");
+#endif
+
+ if (alloc_subdevices(dev, 2) < 0)
+ return -ENOMEM;
+
+ /*
+ * this if the definitions of the supdevices, 2 have been defined
+ */
+ /* Analog indput */
+ s = dev->subdevices + 0;
+ s->type = COMEDI_SUBD_AI; /* define subdevice as Analog In */
+ s->subdev_flags = SDF_READABLE | SDF_GROUND; /* you can read it from userspace */
+ s->n_chan = 16; /* Number of Analog input channels */
+ s->maxdata = 0x0fff; /* accept only 12 bits of data */
+ s->range_table = &range_fl512; /* device use one of the ranges */
+ s->insn_read = fl512_ai_insn; /* function to call when read AD */
+ printk("comedi: fl512: subdevice 0 initialized\n");
+
+ /* Analog output */
+ s = dev->subdevices + 1;
+ s->type = COMEDI_SUBD_AO; /* define subdevice as Analog OUT */
+ s->subdev_flags = SDF_WRITABLE; /* you can write it from userspace */
+ s->n_chan = 2; /* Number of Analog output channels */
+ s->maxdata = 0x0fff; /* accept only 12 bits of data */
+ s->range_table = &range_fl512; /* device use one of the ranges */
+ s->insn_write = fl512_ao_insn; /* function to call when write DA */
+ s->insn_read = fl512_ao_insn_readback; /* function to call when reading DA */
+ printk("comedi: fl512: subdevice 1 initialized\n");
+
+ return 1;
+}
+
+static int fl512_detach(comedi_device * dev)
+{
+ if (dev->iobase)
+ release_region(dev->iobase, FL512_SIZE);
+ printk("comedi%d: fl512: dummy i detach\n", dev->minor);
+ return 0;
+}