2 comedi/drivers/cb_pcimdas.c
3 Comedi driver for Computer Boards PCIM-DAS1602/16
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 Description: Measurement Computing PCI Migration series boards
21 Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas)
22 Author: Richard Bytheway
23 Updated: Wed, 13 Nov 2002 12:34:56 +0000
26 Written to support the PCIM-DAS1602/16 on a 2.4 series kernel.
28 Configuration Options:
32 Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org).
33 Only supports DIO, AO and simple AI in it's present form.
34 No interrupts, multi channel or FIFO AI,
35 although the card looks like it could support this.
36 See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details.
39 #include <linux/module.h>
40 #include <linux/pci.h>
41 #include <linux/interrupt.h>
43 #include "../comedidev.h"
48 /* Registers for the PCIM-DAS1602/16 */
55 /* AI and Counter Constants */
57 #define MAIN_CONN_DIO 1
59 #define ADC_CONV_STAT 3
64 #define CLK8254_1_DATA 8
65 #define CLK8254_2_DATA 9
66 #define CLK8254_3_DATA 10
67 #define CLK8254_CONTROL 11
68 #define USER_COUNTER 12
69 #define RESID_COUNT_H 13
70 #define RESID_COUNT_L 14
73 * this structure is for data unique to this hardware driver. If
74 * several hardware drivers keep similar information in this structure,
75 * feel free to suggest moving the variable to the struct comedi_device
78 struct cb_pcimdas_private {
82 /* Used for AO readback */
83 unsigned int ao_readback[2];
86 static int cb_pcimdas_ai_eoc(struct comedi_device *dev,
87 struct comedi_subdevice *s,
88 struct comedi_insn *insn,
89 unsigned long context)
91 struct cb_pcimdas_private *devpriv = dev->private;
94 status = inb(devpriv->BADR3 + 2);
95 if ((status & 0x80) == 0)
100 static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
101 struct comedi_subdevice *s,
102 struct comedi_insn *insn, unsigned int *data)
104 struct cb_pcimdas_private *devpriv = dev->private;
107 int chan = CR_CHAN(insn->chanspec);
108 unsigned short chanlims;
112 /* only support sw initiated reads from a single channel */
114 /* check channel number */
115 if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
116 maxchans = s->n_chan / 2;
118 maxchans = s->n_chan;
120 if (chan > (maxchans - 1))
121 return -ETIMEDOUT; /* *** Wrong error code. Fixme. */
123 /* configure for sw initiated read */
124 d = inb(devpriv->BADR3 + 5);
125 if ((d & 0x03) > 0) { /* only reset if needed. */
127 outb(d, devpriv->BADR3 + 5);
130 /* set bursting off, conversions on */
131 outb(0x01, devpriv->BADR3 + 6);
133 /* set range to 10V. UP/BP is controlled by a switch on the board */
134 outb(0x00, devpriv->BADR3 + 7);
137 * write channel limits to multiplexer, set Low (bits 0-3) and
138 * High (bits 4-7) channels to chan.
140 chanlims = chan | (chan << 4);
141 outb(chanlims, devpriv->BADR3 + 0);
143 /* convert n samples */
144 for (n = 0; n < insn->n; n++) {
145 /* trigger conversion */
146 outw(0, dev->iobase + 0);
148 /* wait for conversion to end */
149 ret = comedi_timeout(dev, s, insn, cb_pcimdas_ai_eoc, 0);
154 data[n] = inw(dev->iobase + 0);
157 /* return the number of samples read/written */
161 static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
162 struct comedi_subdevice *s,
163 struct comedi_insn *insn, unsigned int *data)
165 struct cb_pcimdas_private *devpriv = dev->private;
167 int chan = CR_CHAN(insn->chanspec);
169 /* Writing a list of values to an AO channel is probably not
170 * very useful, but that's how the interface is defined. */
171 for (i = 0; i < insn->n; i++) {
174 outw(data[i] & 0x0FFF, dev->iobase + DAC0_OFFSET);
177 outw(data[i] & 0x0FFF, dev->iobase + DAC1_OFFSET);
182 devpriv->ao_readback[chan] = data[i];
185 /* return the number of samples read/written */
189 /* AO subdevices should have a read insn as well as a write insn.
190 * Usually this means copying a value stored in devpriv. */
191 static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
192 struct comedi_subdevice *s,
193 struct comedi_insn *insn, unsigned int *data)
195 struct cb_pcimdas_private *devpriv = dev->private;
197 int chan = CR_CHAN(insn->chanspec);
199 for (i = 0; i < insn->n; i++)
200 data[i] = devpriv->ao_readback[chan];
205 static int cb_pcimdas_auto_attach(struct comedi_device *dev,
206 unsigned long context_unused)
208 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
209 struct cb_pcimdas_private *devpriv;
210 struct comedi_subdevice *s;
211 unsigned long iobase_8255;
214 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
218 ret = comedi_pci_enable(dev);
222 dev->iobase = pci_resource_start(pcidev, 2);
223 devpriv->BADR3 = pci_resource_start(pcidev, 3);
224 iobase_8255 = pci_resource_start(pcidev, 4);
226 ret = comedi_alloc_subdevices(dev, 3);
230 s = &dev->subdevices[0];
231 /* dev->read_subdev=s; */
232 /* analog input subdevice */
233 s->type = COMEDI_SUBD_AI;
234 s->subdev_flags = SDF_READABLE | SDF_GROUND;
237 s->range_table = &range_unknown;
238 s->len_chanlist = 1; /* This is the maximum chanlist length that */
239 /* the board can handle */
240 s->insn_read = cb_pcimdas_ai_rinsn;
242 s = &dev->subdevices[1];
243 /* analog output subdevice */
244 s->type = COMEDI_SUBD_AO;
245 s->subdev_flags = SDF_WRITABLE;
248 /* ranges are hardware settable, but not software readable. */
249 s->range_table = &range_unknown;
250 s->insn_write = &cb_pcimdas_ao_winsn;
251 s->insn_read = &cb_pcimdas_ao_rinsn;
253 s = &dev->subdevices[2];
254 /* digital i/o subdevice */
255 ret = subdev_8255_init(dev, s, NULL, iobase_8255);
262 static void cb_pcimdas_detach(struct comedi_device *dev)
265 free_irq(dev->irq, dev);
266 comedi_pci_disable(dev);
269 static struct comedi_driver cb_pcimdas_driver = {
270 .driver_name = "cb_pcimdas",
271 .module = THIS_MODULE,
272 .auto_attach = cb_pcimdas_auto_attach,
273 .detach = cb_pcimdas_detach,
276 static int cb_pcimdas_pci_probe(struct pci_dev *dev,
277 const struct pci_device_id *id)
279 return comedi_pci_auto_config(dev, &cb_pcimdas_driver,
283 static const struct pci_device_id cb_pcimdas_pci_table[] = {
284 { PCI_DEVICE(PCI_VENDOR_ID_CB, 0x0056) },
287 MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
289 static struct pci_driver cb_pcimdas_pci_driver = {
290 .name = "cb_pcimdas",
291 .id_table = cb_pcimdas_pci_table,
292 .probe = cb_pcimdas_pci_probe,
293 .remove = comedi_pci_auto_unconfig,
295 module_comedi_pci_driver(cb_pcimdas_driver, cb_pcimdas_pci_driver);
297 MODULE_AUTHOR("Comedi http://www.comedi.org");
298 MODULE_DESCRIPTION("Comedi low-level driver");
299 MODULE_LICENSE("GPL");