--- /dev/null
+/*
+ comedi/drivers/dt2815.c
+ Hardware driver for Data Translation DT2815
+
+ 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ */
+/*
+Driver: dt2815
+Description: Data Translation DT2815
+Author: ds
+Status: mostly complete, untested
+Devices: [Data Translation] DT2815 (dt2815)
+
+I'm not sure anyone has ever tested this board. If you have information
+contrary, please update.
+
+Configuration options:
+ [0] - I/O port base base address
+ [1] - IRQ (unused)
+ [2] - Voltage unipolar/bipolar configuration
+ 0 == unipolar 5V (0V -- +5V)
+ 1 == bipolar 5V (-5V -- +5V)
+ [3] - Current offset configuration
+ 0 == disabled (0mA -- +32mAV)
+ 1 == enabled (+4mA -- +20mAV)
+ [4] - Firmware program configuration
+ 0 == program 1 (see manual table 5-4)
+ 1 == program 2 (see manual table 5-4)
+ 2 == program 3 (see manual table 5-4)
+ 3 == program 4 (see manual table 5-4)
+ [5] - Analog output 0 range configuration
+ 0 == voltage
+ 1 == current
+ [6] - Analog output 1 range configuration (same options)
+ [7] - Analog output 2 range configuration (same options)
+ [8] - Analog output 3 range configuration (same options)
+ [9] - Analog output 4 range configuration (same options)
+ [10] - Analog output 5 range configuration (same options)
+ [11] - Analog output 6 range configuration (same options)
+ [12] - Analog output 7 range configuration (same options)
+*/
+
+#include "../comedidev.h"
+
+#include <linux/ioport.h>
+#include <linux/delay.h>
+
+static const struct comedi_lrange range_dt2815_ao_32_current = { 1, {
+ RANGE_mA(0, 32)
+ }
+};
+static const struct comedi_lrange range_dt2815_ao_20_current = { 1, {
+ RANGE_mA(4, 20)
+ }
+};
+
+#define DT2815_SIZE 2
+
+#define DT2815_DATA 0
+#define DT2815_STATUS 1
+
+static int dt2815_attach(struct comedi_device * dev, struct comedi_devconfig * it);
+static int dt2815_detach(struct comedi_device * dev);
+static struct comedi_driver driver_dt2815 = {
+ driver_name:"dt2815",
+ module:THIS_MODULE,
+ attach:dt2815_attach,
+ detach:dt2815_detach,
+};
+
+COMEDI_INITCLEANUP(driver_dt2815);
+
+static void dt2815_free_resources(struct comedi_device * dev);
+
+struct dt2815_private {
+
+ const struct comedi_lrange *range_type_list[8];
+ unsigned int ao_readback[8];
+};
+
+
+#define devpriv ((struct dt2815_private *)dev->private)
+
+static int dt2815_wait_for_status(struct comedi_device * dev, int status)
+{
+ int i;
+
+ for (i = 0; i < 100; i++) {
+ if (inb(dev->iobase + DT2815_STATUS) == status)
+ break;
+ }
+ return status;
+}
+
+static int dt2815_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (i = 0; i < insn->n; i++) {
+ data[i] = devpriv->ao_readback[chan];
+ }
+
+ return i;
+}
+
+static int dt2815_ao_insn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+ unsigned int status;
+ unsigned int lo, hi;
+
+ for (i = 0; i < insn->n; i++) {
+ lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
+ hi = (data[i] & 0xff0) >> 4;
+
+ status = dt2815_wait_for_status(dev, 0x00);
+ if (status != 0) {
+ rt_printk
+ ("dt2815: failed to write low byte on %d reason %x\n",
+ chan, status);
+ return -EBUSY;
+ }
+
+ outb(lo, dev->iobase + DT2815_DATA);
+
+ status = dt2815_wait_for_status(dev, 0x10);
+ if (status != 0x10) {
+ rt_printk
+ ("dt2815: failed to write high byte on %d reason %x\n",
+ chan, status);
+ return -EBUSY;
+ }
+ devpriv->ao_readback[chan] = data[i];
+ }
+ return i;
+}
+
+/*
+ options[0] Board base address
+ options[1] IRQ (not applicable)
+ options[2] Voltage unipolar/bipolar configuration
+ 0 == unipolar 5V (0V -- +5V)
+ 1 == bipolar 5V (-5V -- +5V)
+ options[3] Current offset configuration
+ 0 == disabled (0mA -- +32mAV)
+ 1 == enabled (+4mA -- +20mAV)
+ options[4] Firmware program configuration
+ 0 == program 1 (see manual table 5-4)
+ 1 == program 2 (see manual table 5-4)
+ 2 == program 3 (see manual table 5-4)
+ 3 == program 4 (see manual table 5-4)
+ options[5] Analog output 0 range configuration
+ 0 == voltage
+ 1 == current
+ options[6] Analog output 1 range configuration
+ ...
+ options[12] Analog output 7 range configuration
+ 0 == voltage
+ 1 == current
+ */
+
+static int dt2815_attach(struct comedi_device * dev, struct comedi_devconfig * it)
+{
+ struct comedi_subdevice *s;
+ int i;
+ const struct comedi_lrange *current_range_type, *voltage_range_type;
+ unsigned long iobase;
+
+ iobase = it->options[0];
+ printk("comedi%d: dt2815: 0x%04lx ", dev->minor, iobase);
+ if (!request_region(iobase, DT2815_SIZE, "dt2815")) {
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+
+ dev->iobase = iobase;
+ dev->board_name = "dt2815";
+
+ if (alloc_subdevices(dev, 1) < 0)
+ return -ENOMEM;
+ if (alloc_private(dev, sizeof(struct dt2815_private)) < 0)
+ return -ENOMEM;
+
+ s = dev->subdevices;
+ /* ao subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->maxdata = 0xfff;
+ s->n_chan = 8;
+ s->insn_write = dt2815_ao_insn;
+ s->insn_read = dt2815_ao_insn_read;
+ s->range_table_list = devpriv->range_type_list;
+
+ current_range_type = (it->options[3])
+ ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current;
+ voltage_range_type = (it->options[2])
+ ? &range_bipolar5 : &range_unipolar5;
+ for (i = 0; i < 8; i++) {
+ devpriv->range_type_list[i] = (it->options[5 + i])
+ ? current_range_type : voltage_range_type;
+ }
+
+ /* Init the 2815 */
+ outb(0x00, dev->iobase + DT2815_STATUS);
+ for (i = 0; i < 100; i++) {
+ /* This is incredibly slow (approx 20 ms) */
+ unsigned int status;
+
+ comedi_udelay(1000);
+ status = inb(dev->iobase + DT2815_STATUS);
+ if (status == 4) {
+ unsigned int program;
+ program = (it->options[4] & 0x3) << 3 | 0x7;
+ outb(program, dev->iobase + DT2815_DATA);
+ printk(", program: 0x%x (@t=%d)\n", program, i);
+ break;
+ } else if (status != 0x00) {
+ printk("dt2815: unexpected status 0x%x (@t=%d)\n",
+ status, i);
+ if (status & 0x60) {
+ outb(0x00, dev->iobase + DT2815_STATUS);
+ }
+ }
+ }
+
+ printk("\n");
+
+ return 0;
+}
+
+static void dt2815_free_resources(struct comedi_device * dev)
+{
+ if (dev->iobase)
+ release_region(dev->iobase, DT2815_SIZE);
+}
+
+static int dt2815_detach(struct comedi_device * dev)
+{
+ printk("comedi%d: dt2815: remove\n", dev->minor);
+
+ dt2815_free_resources(dev);
+
+ return 0;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff