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
84 * this structure is for data unique to this hardware driver. If
85 * several hardware drivers keep similar information in this structure,
86 * feel free to suggest moving the variable to the struct comedi_device
89 struct cb_pcimdas_private
{
93 /* Used for AO readback */
94 unsigned int ao_readback
[2];
98 * "instructions" read/write data in "one-shot" or "software-triggered"
101 static int cb_pcimdas_ai_rinsn(struct comedi_device
*dev
,
102 struct comedi_subdevice
*s
,
103 struct comedi_insn
*insn
, unsigned int *data
)
105 struct cb_pcimdas_private
*devpriv
= dev
->private;
109 int chan
= CR_CHAN(insn
->chanspec
);
110 unsigned short chanlims
;
113 /* only support sw initiated reads from a single channel */
115 /* check channel number */
116 if ((inb(devpriv
->BADR3
+ 2) & 0x20) == 0) /* differential mode */
117 maxchans
= s
->n_chan
/ 2;
119 maxchans
= s
->n_chan
;
121 if (chan
> (maxchans
- 1))
122 return -ETIMEDOUT
; /* *** Wrong error code. Fixme. */
124 /* configure for sw initiated read */
125 d
= inb(devpriv
->BADR3
+ 5);
126 if ((d
& 0x03) > 0) { /* only reset if needed. */
128 outb(d
, devpriv
->BADR3
+ 5);
130 outb(0x01, devpriv
->BADR3
+ 6); /* set bursting off, conversions on */
131 outb(0x00, devpriv
->BADR3
+ 7); /* set range to 10V. UP/BP is controlled by a switch on the board */
134 * write channel limits to multiplexer, set Low (bits 0-3) and
135 * High (bits 4-7) channels to chan.
137 chanlims
= chan
| (chan
<< 4);
138 outb(chanlims
, devpriv
->BADR3
+ 0);
140 /* convert n samples */
141 for (n
= 0; n
< insn
->n
; n
++) {
142 /* trigger conversion */
143 outw(0, dev
->iobase
+ 0);
145 #define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */
146 /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */
148 /* wait for conversion to end */
149 for (i
= 0; i
< TIMEOUT
; i
++) {
150 busy
= inb(devpriv
->BADR3
+ 2) & 0x80;
159 data
[n
] = inw(dev
->iobase
+ 0);
162 /* return the number of samples read/written */
166 static int cb_pcimdas_ao_winsn(struct comedi_device
*dev
,
167 struct comedi_subdevice
*s
,
168 struct comedi_insn
*insn
, unsigned int *data
)
170 struct cb_pcimdas_private
*devpriv
= dev
->private;
172 int chan
= CR_CHAN(insn
->chanspec
);
174 /* Writing a list of values to an AO channel is probably not
175 * very useful, but that's how the interface is defined. */
176 for (i
= 0; i
< insn
->n
; i
++) {
179 outw(data
[i
] & 0x0FFF, dev
->iobase
+ DAC0_OFFSET
);
182 outw(data
[i
] & 0x0FFF, dev
->iobase
+ DAC1_OFFSET
);
187 devpriv
->ao_readback
[chan
] = data
[i
];
190 /* return the number of samples read/written */
194 /* AO subdevices should have a read insn as well as a write insn.
195 * Usually this means copying a value stored in devpriv. */
196 static int cb_pcimdas_ao_rinsn(struct comedi_device
*dev
,
197 struct comedi_subdevice
*s
,
198 struct comedi_insn
*insn
, unsigned int *data
)
200 struct cb_pcimdas_private
*devpriv
= dev
->private;
202 int chan
= CR_CHAN(insn
->chanspec
);
204 for (i
= 0; i
< insn
->n
; i
++)
205 data
[i
] = devpriv
->ao_readback
[chan
];
210 static int cb_pcimdas_attach_pci(struct comedi_device
*dev
,
211 struct pci_dev
*pcidev
)
213 struct cb_pcimdas_private
*devpriv
;
214 struct comedi_subdevice
*s
;
215 unsigned long iobase_8255
;
218 comedi_set_hw_dev(dev
, &pcidev
->dev
);
220 dev
->board_name
= dev
->driver
->driver_name
;
222 devpriv
= kzalloc(sizeof(*devpriv
), GFP_KERNEL
);
225 dev
->private = devpriv
;
227 ret
= comedi_pci_enable(pcidev
, dev
->board_name
);
231 dev
->iobase
= pci_resource_start(pcidev
, 2);
232 devpriv
->BADR3
= pci_resource_start(pcidev
, 3);
233 iobase_8255
= pci_resource_start(pcidev
, 4);
235 /* Dont support IRQ yet */
237 /* if(request_irq(pcidev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */
239 /* printk(" unable to allocate irq %u\n", pcidev->irq); */
240 /* return -EINVAL; */
242 /* dev->irq = pcidev->irq; */
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
;
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
;
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 subdev_8255_init(dev
, s
, NULL
, iobase_8255
);
275 dev_info(dev
->class_dev
, "%s attached\n", dev
->board_name
);
280 static void cb_pcimdas_detach(struct comedi_device
*dev
)
282 struct pci_dev
*pcidev
= comedi_to_pci_dev(dev
);
285 free_irq(dev
->irq
, dev
);
288 comedi_pci_disable(pcidev
);
292 static struct comedi_driver cb_pcimdas_driver
= {
293 .driver_name
= "cb_pcimdas",
294 .module
= THIS_MODULE
,
295 .attach_pci
= cb_pcimdas_attach_pci
,
296 .detach
= cb_pcimdas_detach
,
299 static int __devinit
cb_pcimdas_pci_probe(struct pci_dev
*dev
,
300 const struct pci_device_id
*ent
)
302 return comedi_pci_auto_config(dev
, &cb_pcimdas_driver
);
305 static void __devexit
cb_pcimdas_pci_remove(struct pci_dev
*dev
)
307 comedi_pci_auto_unconfig(dev
);
310 static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table
) = {
311 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS
, 0x0056) },
314 MODULE_DEVICE_TABLE(pci
, cb_pcimdas_pci_table
);
316 static struct pci_driver cb_pcimdas_pci_driver
= {
317 .name
= "cb_pcimdas",
318 .id_table
= cb_pcimdas_pci_table
,
319 .probe
= cb_pcimdas_pci_probe
,
320 .remove
= __devexit_p(cb_pcimdas_pci_remove
),
322 module_comedi_pci_driver(cb_pcimdas_driver
, cb_pcimdas_pci_driver
);
324 MODULE_AUTHOR("Comedi http://www.comedi.org");
325 MODULE_DESCRIPTION("Comedi low-level driver");
326 MODULE_LICENSE("GPL");