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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: Measurement Computing PCI Migration series boards
26 Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas)
27 Author: Richard Bytheway
28 Updated: Wed, 13 Nov 2002 12:34:56 +0000
31 Written to support the PCIM-DAS1602/16 on a 2.4 series kernel.
33 Configuration Options:
37 Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org).
38 Only supports DIO, AO and simple AI in it's present form.
39 No interrupts, multi channel or FIFO AI, although the card looks like it could support this.
40 See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details.
43 #include "../comedidev.h"
45 #include <linux/delay.h>
46 #include <linux/interrupt.h>
51 /* #define CBPCIMDAS_DEBUG */
52 #undef CBPCIMDAS_DEBUG
54 /* Registers for the PCIM-DAS1602/16 */
56 /* sizes of io regions (bytes) */
64 /* AI and Counter Constants */
66 #define MAIN_CONN_DIO 1
68 #define ADC_CONV_STAT 3
73 #define CLK8254_1_DATA 8
74 #define CLK8254_2_DATA 9
75 #define CLK8254_3_DATA 10
76 #define CLK8254_CONTROL 11
77 #define USER_COUNTER 12
78 #define RESID_COUNT_H 13
79 #define RESID_COUNT_L 14
82 * this structure is for data unique to this hardware driver. If
83 * several hardware drivers keep similar information in this structure,
84 * feel free to suggest moving the variable to the struct comedi_device
87 struct cb_pcimdas_private {
91 /* Used for AO readback */
92 unsigned int ao_readback[2];
96 * "instructions" read/write data in "one-shot" or "software-triggered"
99 static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
100 struct comedi_subdevice *s,
101 struct comedi_insn *insn, unsigned int *data)
103 struct cb_pcimdas_private *devpriv = dev->private;
107 int chan = CR_CHAN(insn->chanspec);
108 unsigned short chanlims;
111 /* only support sw initiated reads from a single channel */
113 /* check channel number */
114 if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
115 maxchans = s->n_chan / 2;
117 maxchans = s->n_chan;
119 if (chan > (maxchans - 1))
120 return -ETIMEDOUT; /* *** Wrong error code. Fixme. */
122 /* configure for sw initiated read */
123 d = inb(devpriv->BADR3 + 5);
124 if ((d & 0x03) > 0) { /* only reset if needed. */
126 outb(d, devpriv->BADR3 + 5);
128 outb(0x01, devpriv->BADR3 + 6); /* set bursting off, conversions on */
129 outb(0x00, devpriv->BADR3 + 7); /* set range to 10V. UP/BP is controlled by a switch on the board */
132 * write channel limits to multiplexer, set Low (bits 0-3) and
133 * High (bits 4-7) channels to chan.
135 chanlims = chan | (chan << 4);
136 outb(chanlims, devpriv->BADR3 + 0);
138 /* convert n samples */
139 for (n = 0; n < insn->n; n++) {
140 /* trigger conversion */
141 outw(0, dev->iobase + 0);
143 #define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */
144 /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */
146 /* wait for conversion to end */
147 for (i = 0; i < TIMEOUT; i++) {
148 busy = inb(devpriv->BADR3 + 2) & 0x80;
157 data[n] = inw(dev->iobase + 0);
160 /* return the number of samples read/written */
164 static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
165 struct comedi_subdevice *s,
166 struct comedi_insn *insn, unsigned int *data)
168 struct cb_pcimdas_private *devpriv = dev->private;
170 int chan = CR_CHAN(insn->chanspec);
172 /* Writing a list of values to an AO channel is probably not
173 * very useful, but that's how the interface is defined. */
174 for (i = 0; i < insn->n; i++) {
177 outw(data[i] & 0x0FFF, dev->iobase + DAC0_OFFSET);
180 outw(data[i] & 0x0FFF, dev->iobase + DAC1_OFFSET);
185 devpriv->ao_readback[chan] = data[i];
188 /* return the number of samples read/written */
192 /* AO subdevices should have a read insn as well as a write insn.
193 * Usually this means copying a value stored in devpriv. */
194 static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
195 struct comedi_subdevice *s,
196 struct comedi_insn *insn, unsigned int *data)
198 struct cb_pcimdas_private *devpriv = dev->private;
200 int chan = CR_CHAN(insn->chanspec);
202 for (i = 0; i < insn->n; i++)
203 data[i] = devpriv->ao_readback[chan];
208 static int cb_pcimdas_auto_attach(struct comedi_device *dev,
209 unsigned long context_unused)
211 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
212 struct cb_pcimdas_private *devpriv;
213 struct comedi_subdevice *s;
214 unsigned long iobase_8255;
217 dev->board_name = dev->driver->driver_name;
219 devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
222 dev->private = devpriv;
224 ret = comedi_pci_enable(pcidev, dev->board_name);
228 dev->iobase = pci_resource_start(pcidev, 2);
229 devpriv->BADR3 = pci_resource_start(pcidev, 3);
230 iobase_8255 = pci_resource_start(pcidev, 4);
232 /* Dont support IRQ yet */
234 /* if(request_irq(pcidev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */
236 /* printk(" unable to allocate irq %u\n", pcidev->irq); */
237 /* return -EINVAL; */
239 /* dev->irq = pcidev->irq; */
241 ret = comedi_alloc_subdevices(dev, 3);
245 s = &dev->subdevices[0];
246 /* dev->read_subdev=s; */
247 /* analog input subdevice */
248 s->type = COMEDI_SUBD_AI;
249 s->subdev_flags = SDF_READABLE | SDF_GROUND;
252 s->range_table = &range_unknown;
253 s->len_chanlist = 1; /* This is the maximum chanlist length that */
254 /* the board can handle */
255 s->insn_read = cb_pcimdas_ai_rinsn;
257 s = &dev->subdevices[1];
258 /* analog output subdevice */
259 s->type = COMEDI_SUBD_AO;
260 s->subdev_flags = SDF_WRITABLE;
263 /* ranges are hardware settable, but not software readable. */
264 s->range_table = &range_unknown;
265 s->insn_write = &cb_pcimdas_ao_winsn;
266 s->insn_read = &cb_pcimdas_ao_rinsn;
268 s = &dev->subdevices[2];
269 /* digital i/o subdevice */
270 subdev_8255_init(dev, s, NULL, iobase_8255);
272 dev_info(dev->class_dev, "%s attached\n", dev->board_name);
277 static void cb_pcimdas_detach(struct comedi_device *dev)
279 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
282 free_irq(dev->irq, dev);
285 comedi_pci_disable(pcidev);
289 static struct comedi_driver cb_pcimdas_driver = {
290 .driver_name = "cb_pcimdas",
291 .module = THIS_MODULE,
292 .auto_attach = cb_pcimdas_auto_attach,
293 .detach = cb_pcimdas_detach,
296 static int cb_pcimdas_pci_probe(struct pci_dev *dev,
297 const struct pci_device_id *ent)
299 return comedi_pci_auto_config(dev, &cb_pcimdas_driver);
302 static void cb_pcimdas_pci_remove(struct pci_dev *dev)
304 comedi_pci_auto_unconfig(dev);
307 static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = {
308 { PCI_DEVICE(PCI_VENDOR_ID_CB, 0x0056) },
311 MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
313 static struct pci_driver cb_pcimdas_pci_driver = {
314 .name = "cb_pcimdas",
315 .id_table = cb_pcimdas_pci_table,
316 .probe = cb_pcimdas_pci_probe,
317 .remove = cb_pcimdas_pci_remove,
319 module_comedi_pci_driver(cb_pcimdas_driver, cb_pcimdas_pci_driver);
321 MODULE_AUTHOR("Comedi http://www.comedi.org");
322 MODULE_DESCRIPTION("Comedi low-level driver");
323 MODULE_LICENSE("GPL");