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 #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
56 /* Registers for the PCIM-DAS1602/16 */
58 /* sizes of io regions (bytes) */
66 /* AI and Counter Constants */
68 #define MAIN_CONN_DIO 1
70 #define ADC_CONV_STAT 3
75 #define CLK8254_1_DATA 8
76 #define CLK8254_2_DATA 9
77 #define CLK8254_3_DATA 10
78 #define CLK8254_CONTROL 11
79 #define USER_COUNTER 12
80 #define RESID_COUNT_H 13
81 #define RESID_COUNT_L 14
83 /* Board description */
84 struct cb_pcimdas_board
{
86 unsigned short device_id
;
87 int ai_se_chans
; /* Inputs in single-ended mode */
88 int ai_diff_chans
; /* Inputs in differential mode */
89 int ai_bits
; /* analog input resolution */
90 int ai_speed
; /* fastest conversion period in ns */
91 int ao_nchan
; /* number of analog out channels */
92 int ao_bits
; /* analogue output resolution */
93 int has_ao_fifo
; /* analog output has fifo */
94 int ao_scan_speed
; /* analog output speed for 1602 series (for a scan, not conversion) */
95 int fifo_size
; /* number of samples fifo can hold */
96 int dio_bits
; /* number of dio bits */
97 int has_dio
; /* has DIO */
98 const struct comedi_lrange
*ranges
;
101 static const struct cb_pcimdas_board cb_pcimdas_boards
[] = {
103 .name
= "PCIM-DAS1602/16",
108 .ai_speed
= 10000, /* ?? */
111 .has_ao_fifo
= 0, /* ?? */
112 .ao_scan_speed
= 10000,
117 /* .ranges = &cb_pcimdas_ranges, */
122 * Useful for shorthand access to the particular board structure
124 #define thisboard ((const struct cb_pcimdas_board *)dev->board_ptr)
127 * this structure is for data unique to this hardware driver. If
128 * several hardware drivers keep similar information in this structure,
129 * feel free to suggest moving the variable to the struct comedi_device
132 struct cb_pcimdas_private
{
136 /* Used for AO readback */
137 unsigned int ao_readback
[2];
141 * most drivers define the following macro to make it easy to
142 * access the private structure.
144 #define devpriv ((struct cb_pcimdas_private *)dev->private)
146 static int cb_pcimdas_ai_rinsn(struct comedi_device
*dev
,
147 struct comedi_subdevice
*s
,
148 struct comedi_insn
*insn
, unsigned int *data
);
149 static int cb_pcimdas_ao_winsn(struct comedi_device
*dev
,
150 struct comedi_subdevice
*s
,
151 struct comedi_insn
*insn
, unsigned int *data
);
152 static int cb_pcimdas_ao_rinsn(struct comedi_device
*dev
,
153 struct comedi_subdevice
*s
,
154 struct comedi_insn
*insn
, unsigned int *data
);
156 static struct pci_dev
*cb_pcimdas_find_pci_dev(struct comedi_device
*dev
,
157 struct comedi_devconfig
*it
)
159 struct pci_dev
*pcidev
= NULL
;
160 int bus
= it
->options
[0];
161 int slot
= it
->options
[1];
164 for_each_pci_dev(pcidev
) {
166 if (bus
!= pcidev
->bus
->number
||
167 slot
!= PCI_SLOT(pcidev
->devfn
))
170 if (pcidev
->vendor
!= PCI_VENDOR_ID_COMPUTERBOARDS
)
173 for (i
= 0; i
< ARRAY_SIZE(cb_pcimdas_boards
); i
++) {
174 if (cb_pcimdas_boards
[i
].device_id
!= pcidev
->device
)
177 dev
->board_ptr
= cb_pcimdas_boards
+ i
;
181 dev_err(dev
->class_dev
,
182 "No supported board found! (req. bus %d, slot %d)\n",
188 * Attach is called by the Comedi core to configure the driver
189 * for a particular board. If you specified a board_name array
190 * in the driver structure, dev->board_ptr contains that
193 static int cb_pcimdas_attach(struct comedi_device
*dev
,
194 struct comedi_devconfig
*it
)
196 struct pci_dev
*pcidev
;
197 struct comedi_subdevice
*s
;
198 unsigned long iobase_8255
;
202 * Allocate the private structure area.
204 if (alloc_private(dev
, sizeof(struct cb_pcimdas_private
)) < 0)
207 pcidev
= cb_pcimdas_find_pci_dev(dev
, it
);
210 comedi_set_hw_dev(dev
, &pcidev
->dev
);
212 /* Warn about non-tested features */
213 switch (thisboard
->device_id
) {
217 dev_dbg(dev
->class_dev
, "THIS CARD IS UNSUPPORTED.\n");
218 dev_dbg(dev
->class_dev
,
219 "PLEASE REPORT USAGE TO <mocelet@sucs.org>\n");
222 if (comedi_pci_enable(pcidev
, "cb_pcimdas")) {
223 dev_err(dev
->class_dev
,
224 "Failed to enable PCI device and request regions\n");
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 /* Initialize dev->board_name */
242 dev
->board_name
= thisboard
->name
;
244 ret
= comedi_alloc_subdevices(dev
, 3);
248 s
= dev
->subdevices
+ 0;
249 /* dev->read_subdev=s; */
250 /* analog input subdevice */
251 s
->type
= COMEDI_SUBD_AI
;
252 s
->subdev_flags
= SDF_READABLE
| SDF_GROUND
;
253 s
->n_chan
= thisboard
->ai_se_chans
;
254 s
->maxdata
= (1 << thisboard
->ai_bits
) - 1;
255 s
->range_table
= &range_unknown
;
256 s
->len_chanlist
= 1; /* This is the maximum chanlist length that */
257 /* the board can handle */
258 s
->insn_read
= cb_pcimdas_ai_rinsn
;
260 s
= dev
->subdevices
+ 1;
261 /* analog output subdevice */
262 s
->type
= COMEDI_SUBD_AO
;
263 s
->subdev_flags
= SDF_WRITABLE
;
264 s
->n_chan
= thisboard
->ao_nchan
;
265 s
->maxdata
= 1 << thisboard
->ao_bits
;
266 /* ranges are hardware settable, but not software readable. */
267 s
->range_table
= &range_unknown
;
268 s
->insn_write
= &cb_pcimdas_ao_winsn
;
269 s
->insn_read
= &cb_pcimdas_ao_rinsn
;
271 s
= dev
->subdevices
+ 2;
272 /* digital i/o subdevice */
273 if (thisboard
->has_dio
)
274 subdev_8255_init(dev
, s
, NULL
, iobase_8255
);
276 s
->type
= COMEDI_SUBD_UNUSED
;
281 static void cb_pcimdas_detach(struct comedi_device
*dev
)
283 struct pci_dev
*pcidev
= comedi_to_pci_dev(dev
);
286 free_irq(dev
->irq
, dev
);
289 comedi_pci_disable(pcidev
);
295 * "instructions" read/write data in "one-shot" or "software-triggered"
298 static int cb_pcimdas_ai_rinsn(struct comedi_device
*dev
,
299 struct comedi_subdevice
*s
,
300 struct comedi_insn
*insn
, unsigned int *data
)
305 int chan
= CR_CHAN(insn
->chanspec
);
306 unsigned short chanlims
;
309 /* only support sw initiated reads from a single channel */
311 /* check channel number */
312 if ((inb(devpriv
->BADR3
+ 2) & 0x20) == 0) /* differential mode */
313 maxchans
= thisboard
->ai_diff_chans
;
315 maxchans
= thisboard
->ai_se_chans
;
317 if (chan
> (maxchans
- 1))
318 return -ETIMEDOUT
; /* *** Wrong error code. Fixme. */
320 /* configure for sw initiated read */
321 d
= inb(devpriv
->BADR3
+ 5);
322 if ((d
& 0x03) > 0) { /* only reset if needed. */
324 outb(d
, devpriv
->BADR3
+ 5);
326 outb(0x01, devpriv
->BADR3
+ 6); /* set bursting off, conversions on */
327 outb(0x00, devpriv
->BADR3
+ 7); /* set range to 10V. UP/BP is controlled by a switch on the board */
330 * write channel limits to multiplexer, set Low (bits 0-3) and
331 * High (bits 4-7) channels to chan.
333 chanlims
= chan
| (chan
<< 4);
334 outb(chanlims
, devpriv
->BADR3
+ 0);
336 /* convert n samples */
337 for (n
= 0; n
< insn
->n
; n
++) {
338 /* trigger conversion */
339 outw(0, dev
->iobase
+ 0);
341 #define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */
342 /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */
344 /* wait for conversion to end */
345 for (i
= 0; i
< TIMEOUT
; i
++) {
346 busy
= inb(devpriv
->BADR3
+ 2) & 0x80;
355 d
= inw(dev
->iobase
+ 0);
357 /* mangle the data as necessary */
358 /* d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed. */
363 /* return the number of samples read/written */
367 static int cb_pcimdas_ao_winsn(struct comedi_device
*dev
,
368 struct comedi_subdevice
*s
,
369 struct comedi_insn
*insn
, unsigned int *data
)
372 int chan
= CR_CHAN(insn
->chanspec
);
374 /* Writing a list of values to an AO channel is probably not
375 * very useful, but that's how the interface is defined. */
376 for (i
= 0; i
< insn
->n
; i
++) {
379 outw(data
[i
] & 0x0FFF, dev
->iobase
+ DAC0_OFFSET
);
382 outw(data
[i
] & 0x0FFF, dev
->iobase
+ DAC1_OFFSET
);
387 devpriv
->ao_readback
[chan
] = data
[i
];
390 /* return the number of samples read/written */
394 /* AO subdevices should have a read insn as well as a write insn.
395 * Usually this means copying a value stored in devpriv. */
396 static int cb_pcimdas_ao_rinsn(struct comedi_device
*dev
,
397 struct comedi_subdevice
*s
,
398 struct comedi_insn
*insn
, unsigned int *data
)
401 int chan
= CR_CHAN(insn
->chanspec
);
403 for (i
= 0; i
< insn
->n
; i
++)
404 data
[i
] = devpriv
->ao_readback
[chan
];
409 static struct comedi_driver cb_pcimdas_driver
= {
410 .driver_name
= "cb_pcimdas",
411 .module
= THIS_MODULE
,
412 .attach
= cb_pcimdas_attach
,
413 .detach
= cb_pcimdas_detach
,
416 static int __devinit
cb_pcimdas_pci_probe(struct pci_dev
*dev
,
417 const struct pci_device_id
*ent
)
419 return comedi_pci_auto_config(dev
, &cb_pcimdas_driver
);
422 static void __devexit
cb_pcimdas_pci_remove(struct pci_dev
*dev
)
424 comedi_pci_auto_unconfig(dev
);
427 static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table
) = {
428 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS
, 0x0056) },
431 MODULE_DEVICE_TABLE(pci
, cb_pcimdas_pci_table
);
433 static struct pci_driver cb_pcimdas_pci_driver
= {
434 .name
= "cb_pcimdas",
435 .id_table
= cb_pcimdas_pci_table
,
436 .probe
= cb_pcimdas_pci_probe
,
437 .remove
= __devexit_p(cb_pcimdas_pci_remove
),
439 module_comedi_pci_driver(cb_pcimdas_driver
, cb_pcimdas_pci_driver
);
441 MODULE_AUTHOR("Comedi http://www.comedi.org");
442 MODULE_DESCRIPTION("Comedi low-level driver");
443 MODULE_LICENSE("GPL");