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.measurementcomputing.com/PDFManuals/pcim-das1602_16.pdf for more details.
43 #include "../comedidev.h"
45 #include <linux/delay.h>
46 #include <linux/interrupt.h>
48 #include "comedi_pci.h"
52 /* #define CBPCIMDAS_DEBUG */
53 #undef CBPCIMDAS_DEBUG
55 /* Registers for the PCIM-DAS1602/16 */
57 /* sizes of io regions (bytes) */
58 #define BADR0_SIZE 2 /* ?? */
69 /* AI and Counter Constants */
71 #define MAIN_CONN_DIO 1
73 #define ADC_CONV_STAT 3
78 #define CLK8254_1_DATA 8
79 #define CLK8254_2_DATA 9
80 #define CLK8254_3_DATA 10
81 #define CLK8254_CONTROL 11
82 #define USER_COUNTER 12
83 #define RESID_COUNT_H 13
84 #define RESID_COUNT_L 14
86 /* Board description */
87 struct cb_pcimdas_board {
89 unsigned short device_id;
90 int ai_se_chans; /* Inputs in single-ended mode */
91 int ai_diff_chans; /* Inputs in differential mode */
92 int ai_bits; /* analog input resolution */
93 int ai_speed; /* fastest conversion period in ns */
94 int ao_nchan; /* number of analog out channels */
95 int ao_bits; /* analogue output resolution */
96 int has_ao_fifo; /* analog output has fifo */
97 int ao_scan_speed; /* analog output speed for 1602 series (for a scan, not conversion) */
98 int fifo_size; /* number of samples fifo can hold */
99 int dio_bits; /* number of dio bits */
100 int has_dio; /* has DIO */
101 const struct comedi_lrange *ranges;
104 static const struct cb_pcimdas_board cb_pcimdas_boards[] = {
106 .name = "PCIM-DAS1602/16",
111 .ai_speed = 10000, /* ?? */
114 .has_ao_fifo = 0, /* ?? */
115 .ao_scan_speed = 10000,
120 /* .ranges = &cb_pcimdas_ranges, */
124 /* This is used by modprobe to translate PCI IDs to drivers. Should
125 * only be used for PCI and ISA-PnP devices */
126 static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = {
128 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
133 MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
135 #define N_BOARDS 1 /* Max number of boards supported */
138 * Useful for shorthand access to the particular board structure
140 #define thisboard ((const struct cb_pcimdas_board *)dev->board_ptr)
142 /* this structure is for data unique to this hardware driver. If
143 several hardware drivers keep similar information in this structure,
144 feel free to suggest moving the variable to the struct comedi_device struct. */
145 struct cb_pcimdas_private {
148 /* would be useful for a PCI device */
149 struct pci_dev *pci_dev;
158 /* Used for AO readback */
159 unsigned int ao_readback[2];
162 unsigned short int port_a; /* copy of BADR4+0 */
163 unsigned short int port_b; /* copy of BADR4+1 */
164 unsigned short int port_c; /* copy of BADR4+2 */
165 unsigned short int dio_mode; /* copy of BADR4+3 */
170 * most drivers define the following macro to make it easy to
171 * access the private structure.
173 #define devpriv ((struct cb_pcimdas_private *)dev->private)
176 * The struct comedi_driver structure tells the Comedi core module
177 * which functions to call to configure/deconfigure (attach/detach)
178 * the board, and also about the kernel module that contains
181 static int cb_pcimdas_attach(struct comedi_device *dev,
182 struct comedi_devconfig *it);
183 static int cb_pcimdas_detach(struct comedi_device *dev);
184 static struct comedi_driver driver_cb_pcimdas = {
185 .driver_name = "cb_pcimdas",
186 .module = THIS_MODULE,
187 .attach = cb_pcimdas_attach,
188 .detach = cb_pcimdas_detach,
191 static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
192 struct comedi_subdevice *s,
193 struct comedi_insn *insn, unsigned int *data);
194 static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
195 struct comedi_subdevice *s,
196 struct comedi_insn *insn, unsigned int *data);
197 static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
198 struct comedi_subdevice *s,
199 struct comedi_insn *insn, unsigned int *data);
202 * Attach is called by the Comedi core to configure the driver
203 * for a particular board. If you specified a board_name array
204 * in the driver structure, dev->board_ptr contains that
207 static int cb_pcimdas_attach(struct comedi_device *dev,
208 struct comedi_devconfig *it)
210 struct comedi_subdevice *s;
211 struct pci_dev *pcidev;
215 printk("comedi%d: cb_pcimdas: ", dev->minor);
218 * Allocate the private structure area.
220 if (alloc_private(dev, sizeof(struct cb_pcimdas_private)) < 0)
224 * Probe the device to determine what device in the series it is.
228 for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
230 pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
231 /* is it not a computer boards card? */
232 if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
234 /* loop through cards supported by this driver */
235 for (index = 0; index < N_BOARDS; index++) {
236 if (cb_pcimdas_boards[index].device_id !=
239 /* was a particular bus/slot requested? */
240 if (it->options[0] || it->options[1]) {
241 /* are we on the wrong bus/slot? */
242 if (pcidev->bus->number != it->options[0] ||
243 PCI_SLOT(pcidev->devfn) != it->options[1]) {
247 devpriv->pci_dev = pcidev;
248 dev->board_ptr = cb_pcimdas_boards + index;
253 printk("No supported ComputerBoards/MeasurementComputing card found on "
254 "requested position\n");
259 printk("Found %s on bus %i, slot %i\n", cb_pcimdas_boards[index].name,
260 pcidev->bus->number, PCI_SLOT(pcidev->devfn));
262 /* Warn about non-tested features */
263 switch (thisboard->device_id) {
267 printk("THIS CARD IS UNSUPPORTED.\n"
268 "PLEASE REPORT USAGE TO <mocelet@sucs.org>\n");
271 if (comedi_pci_enable(pcidev, "cb_pcimdas")) {
272 printk(" Failed to enable PCI device and request regions\n");
276 devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0);
277 devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1);
278 devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2);
279 devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3);
280 devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4);
282 #ifdef CBPCIMDAS_DEBUG
283 printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0);
284 printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1);
285 printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2);
286 printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3);
287 printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4);
290 /* Dont support IRQ yet */
292 /* if(request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */
294 /* printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq); */
295 /* return -EINVAL; */
297 /* dev->irq = devpriv->pci_dev->irq; */
299 /* Initialize dev->board_name */
300 dev->board_name = thisboard->name;
303 * Allocate the subdevice structures. alloc_subdevice() is a
304 * convenient macro defined in comedidev.h.
306 if (alloc_subdevices(dev, 3) < 0)
309 s = dev->subdevices + 0;
310 /* dev->read_subdev=s; */
311 /* analog input subdevice */
312 s->type = COMEDI_SUBD_AI;
313 s->subdev_flags = SDF_READABLE | SDF_GROUND;
314 s->n_chan = thisboard->ai_se_chans;
315 s->maxdata = (1 << thisboard->ai_bits) - 1;
316 s->range_table = &range_unknown;
317 s->len_chanlist = 1; /* This is the maximum chanlist length that */
318 /* the board can handle */
319 s->insn_read = cb_pcimdas_ai_rinsn;
321 s = dev->subdevices + 1;
322 /* analog output subdevice */
323 s->type = COMEDI_SUBD_AO;
324 s->subdev_flags = SDF_WRITABLE;
325 s->n_chan = thisboard->ao_nchan;
326 s->maxdata = 1 << thisboard->ao_bits;
327 s->range_table = &range_unknown; /* ranges are hardware settable, but not software readable. */
328 s->insn_write = &cb_pcimdas_ao_winsn;
329 s->insn_read = &cb_pcimdas_ao_rinsn;
331 s = dev->subdevices + 2;
332 /* digital i/o subdevice */
333 if (thisboard->has_dio)
334 subdev_8255_init(dev, s, NULL, devpriv->BADR4);
336 s->type = COMEDI_SUBD_UNUSED;
338 printk("attached\n");
344 * _detach is called to deconfigure a device. It should deallocate
346 * This function is also called when _attach() fails, so it should be
347 * careful not to release resources that were not necessarily
348 * allocated by _attach(). dev->private and dev->subdevices are
349 * deallocated automatically by the core.
351 static int cb_pcimdas_detach(struct comedi_device *dev)
353 #ifdef CBPCIMDAS_DEBUG
355 printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0);
356 printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1);
357 printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2);
358 printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3);
359 printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4);
362 printk("comedi%d: cb_pcimdas: remove\n", dev->minor);
364 free_irq(dev->irq, dev);
366 if (devpriv->pci_dev) {
368 comedi_pci_disable(devpriv->pci_dev);
369 pci_dev_put(devpriv->pci_dev);
377 * "instructions" read/write data in "one-shot" or "software-triggered"
380 static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
381 struct comedi_subdevice *s,
382 struct comedi_insn *insn, unsigned int *data)
387 int chan = CR_CHAN(insn->chanspec);
388 unsigned short chanlims;
391 /* only support sw initiated reads from a single channel */
393 /* check channel number */
394 if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
395 maxchans = thisboard->ai_diff_chans;
397 maxchans = thisboard->ai_se_chans;
399 if (chan > (maxchans - 1))
400 return -ETIMEDOUT; /* *** Wrong error code. Fixme. */
402 /* configure for sw initiated read */
403 d = inb(devpriv->BADR3 + 5);
404 if ((d & 0x03) > 0) { /* only reset if needed. */
406 outb(d, devpriv->BADR3 + 5);
408 outb(0x01, devpriv->BADR3 + 6); /* set bursting off, conversions on */
409 outb(0x00, devpriv->BADR3 + 7); /* set range to 10V. UP/BP is controlled by a switch on the board */
411 /* write channel limits to multiplexer, set Low (bits 0-3) and High (bits 4-7) channels to chan. */
412 chanlims = chan | (chan << 4);
413 outb(chanlims, devpriv->BADR3 + 0);
415 /* convert n samples */
416 for (n = 0; n < insn->n; n++) {
417 /* trigger conversion */
418 outw(0, devpriv->BADR2 + 0);
420 #define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */
421 /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */
423 /* wait for conversion to end */
424 for (i = 0; i < TIMEOUT; i++) {
425 busy = inb(devpriv->BADR3 + 2) & 0x80;
434 d = inw(devpriv->BADR2 + 0);
436 /* mangle the data as necessary */
437 /* d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed. */
442 /* return the number of samples read/written */
446 static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
447 struct comedi_subdevice *s,
448 struct comedi_insn *insn, unsigned int *data)
451 int chan = CR_CHAN(insn->chanspec);
453 /* Writing a list of values to an AO channel is probably not
454 * very useful, but that's how the interface is defined. */
455 for (i = 0; i < insn->n; i++) {
458 outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC0_OFFSET);
461 outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC1_OFFSET);
466 devpriv->ao_readback[chan] = data[i];
469 /* return the number of samples read/written */
473 /* AO subdevices should have a read insn as well as a write insn.
474 * Usually this means copying a value stored in devpriv. */
475 static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
476 struct comedi_subdevice *s,
477 struct comedi_insn *insn, unsigned int *data)
480 int chan = CR_CHAN(insn->chanspec);
482 for (i = 0; i < insn->n; i++)
483 data[i] = devpriv->ao_readback[chan];
489 * A convenient macro that defines init_module() and cleanup_module(),
492 COMEDI_PCI_INITCLEANUP(driver_cb_pcimdas, cb_pcimdas_pci_table);