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: [Computer Boards] 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 <linux/comedidev.h>
45 #include <linux/pci.h>
46 #include <linux/delay.h>
51 //#define CBPCIMDAS_DEBUG
52 #undef CBPCIMDAS_DEBUG
54 /* Registers for the PCIM-DAS1602/16 */
56 // sizes of io regions (bytes)
57 #define BADR0_SIZE 2 //??
68 //AI and Counter Constants
70 #define MAIN_CONN_DIO 1
72 #define ADC_CONV_STAT 3
77 #define CLK8254_1_DATA 8
78 #define CLK8254_2_DATA 9
79 #define CLK8254_3_DATA 10
80 #define CLK8254_CONTROL 11
81 #define USER_COUNTER 12
82 #define RESID_COUNT_H 13
83 #define RESID_COUNT_L 14
85 /* Board description */
86 typedef struct cb_pcimdas_board_struct
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 comedi_lrange *ranges;
104 static cb_pcimdas_board cb_pcimdas_boards[] =
107 name: "PCIM-DAS1602/16",
112 ai_speed: 10000, //??
116 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 struct pci_device_id cb_pcimdas_pci_table[] __devinitdata = {
127 { PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
130 MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
132 #define N_BOARDS 1 // Max number of boards supported
135 * Useful for shorthand access to the particular board structure
137 #define thisboard ((cb_pcimdas_board *)dev->board_ptr)
139 /* this structure is for data unique to this hardware driver. If
140 several hardware drivers keep similar information in this structure,
141 feel free to suggest moving the variable to the comedi_device struct. */
145 // would be useful for a PCI device
146 struct pci_dev *pci_dev;
155 /* Used for AO readback */
156 lsampl_t ao_readback[2];
159 unsigned short int port_a; // copy of BADR4+0
160 unsigned short int port_b; // copy of BADR4+1
161 unsigned short int port_c; // copy of BADR4+2
162 unsigned short int dio_mode; // copy of BADR4+3
167 * most drivers define the following macro to make it easy to
168 * access the private structure.
170 #define devpriv ((cb_pcimdas_private *)dev->private)
173 * The comedi_driver structure tells the Comedi core module
174 * which functions to call to configure/deconfigure (attach/detach)
175 * the board, and also about the kernel module that contains
178 static int cb_pcimdas_attach(comedi_device *dev,comedi_devconfig *it);
179 static int cb_pcimdas_detach(comedi_device *dev);
180 static comedi_driver driver_cb_pcimdas={
181 driver_name: "cb_pcimdas",
183 attach: cb_pcimdas_attach,
184 detach: cb_pcimdas_detach,
187 static int cb_pcimdas_ai_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
188 static int cb_pcimdas_ao_winsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
189 static int cb_pcimdas_ao_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
192 * Attach is called by the Comedi core to configure the driver
193 * for a particular board. If you specified a board_name array
194 * in the driver structure, dev->board_ptr contains that
197 static int cb_pcimdas_attach(comedi_device *dev,comedi_devconfig *it)
200 struct pci_dev* pcidev;
204 printk("comedi%d: cb_pcimdas: ",dev->minor);
207 * Allocate the private structure area.
209 if(alloc_private(dev,sizeof(cb_pcimdas_private))<0)
213 * Probe the device to determine what device in the series it is.
217 for(pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); pcidev != NULL ;
218 pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev))
220 // is it not a computer boards card?
221 if(pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
223 // loop through cards supported by this driver
224 for(index = 0; index < N_BOARDS; index++)
226 if(cb_pcimdas_boards[index].device_id != pcidev->device)
228 // was a particular bus/slot requested?
229 if(it->options[0] || it->options[1])
231 // are we on the wrong bus/slot?
232 if(pcidev->bus->number != it->options[0] ||
233 PCI_SLOT(pcidev->devfn) != it->options[1])
238 devpriv->pci_dev = pcidev;
239 dev->board_ptr = cb_pcimdas_boards + index;
244 printk("No supported ComputerBoards/MeasurementComputing card found on "
245 "requested position\n");
250 printk("Found %s on bus %i, slot %i\n", cb_pcimdas_boards[index].name,
251 pcidev->bus->number, PCI_SLOT(pcidev->devfn));
253 // Warn about non-tested features
254 switch(thisboard->device_id)
259 printk( "THIS CARD IS UNSUPPORTED.\n"
260 "PLEASE REPORT USAGE TO <mocelet@sucs.org>\n");
263 if(pci_enable_device(pcidev))
265 printk(" Failed to enable PCI device\n");
268 if(pci_request_regions(pcidev, "cb_pcimdas"))
270 printk(" I/O port conflict\n");
274 devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0);
275 devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1);
276 devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2);
277 devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3);
278 devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4);
280 #ifdef CBPCIMDAS_DEBUG
281 printk("devpriv->BADR0 = 0x%lx\n",devpriv->BADR0);
282 printk("devpriv->BADR1 = 0x%lx\n",devpriv->BADR1);
283 printk("devpriv->BADR2 = 0x%lx\n",devpriv->BADR2);
284 printk("devpriv->BADR3 = 0x%lx\n",devpriv->BADR3);
285 printk("devpriv->BADR4 = 0x%lx\n",devpriv->BADR4);
289 // Dont support IRQ yet
291 // if(comedi_request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev ))
293 // printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq);
296 // dev->irq = devpriv->pci_dev->irq;
298 //Initialize dev->board_name
299 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)
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;
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;
339 printk("attached\n");
346 * _detach is called to deconfigure a device. It should deallocate
348 * This function is also called when _attach() fails, so it should be
349 * careful not to release resources that were not necessarily
350 * allocated by _attach(). dev->private and dev->subdevices are
351 * deallocated automatically by the core.
353 static int cb_pcimdas_detach(comedi_device *dev)
355 #ifdef CBPCIMDAS_DEBUG
358 printk("devpriv->BADR0 = 0x%lx\n",devpriv->BADR0);
359 printk("devpriv->BADR1 = 0x%lx\n",devpriv->BADR1);
360 printk("devpriv->BADR2 = 0x%lx\n",devpriv->BADR2);
361 printk("devpriv->BADR3 = 0x%lx\n",devpriv->BADR3);
362 printk("devpriv->BADR4 = 0x%lx\n",devpriv->BADR4);
365 printk("comedi%d: cb_pcimdas: remove\n",dev->minor);
367 comedi_free_irq(dev->irq, dev);
374 pci_release_regions(devpriv->pci_dev);
375 pci_disable_device(devpriv->pci_dev);
377 pci_dev_put(devpriv->pci_dev);
385 * "instructions" read/write data in "one-shot" or "software-triggered"
388 static int cb_pcimdas_ai_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
393 int chan = CR_CHAN(insn->chanspec);
394 unsigned short chanlims;
397 // only support sw initiated reads from a single channel
399 //check channel number
400 if ((inb(devpriv->BADR3+2) & 0x20)==0) //differential mode
401 maxchans=thisboard->ai_diff_chans;
403 maxchans=thisboard->ai_se_chans;
405 if (chan>(maxchans-1))
406 return -ETIMEDOUT; //*** Wrong error code. Fixme.
408 //configure for sw initiated read
409 d=inb(devpriv->BADR3+5);
410 if ((d & 0x03)>0) { //only reset if needed.
412 outb(d,devpriv->BADR3+5);
414 outb(0x01,devpriv->BADR3+6); //set bursting off, conversions on
415 outb(0x00,devpriv->BADR3+7); //set range to 10V. UP/BP is controlled by a switch on the board
417 // write channel limits to multiplexer, set Low (bits 0-3) and High (bits 4-7) channels to chan.
418 chanlims=chan | (chan<<4);
419 outb(chanlims,devpriv->BADR3+0);
421 /* convert n samples */
422 for(n=0;n<insn->n;n++){
423 /* trigger conversion */
424 outw(0,devpriv->BADR2+0);
426 #define TIMEOUT 1000 //typically takes 5 loops on a lightly loaded Pentium 100MHz,
427 //this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit.
429 /* wait for conversion to end */
430 for(i=0;i<TIMEOUT;i++){
431 busy = inb(devpriv->BADR3+2)&0x80;
439 d = inw(devpriv->BADR2+0);
441 /* mangle the data as necessary */
442 //d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed.
447 /* return the number of samples read/written */
452 static int cb_pcimdas_ao_winsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
455 int chan = CR_CHAN(insn->chanspec);
457 /* Writing a list of values to an AO channel is probably not
458 * very useful, but that's how the interface is defined. */
459 for(i=0;i<insn->n;i++){
462 outw(data[i] & 0x0FFF,devpriv->BADR2+DAC0_OFFSET);
465 outw(data[i] & 0x0FFF,devpriv->BADR2+DAC1_OFFSET);
470 devpriv->ao_readback[chan] = data[i];
473 /* return the number of samples read/written */
477 /* AO subdevices should have a read insn as well as a write insn.
478 * Usually this means copying a value stored in devpriv. */
479 static int cb_pcimdas_ao_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
482 int chan = CR_CHAN(insn->chanspec);
484 for(i=0;i<insn->n;i++)
485 data[i] = devpriv->ao_readback[chan];
492 * A convenient macro that defines init_module() and cleanup_module(),
495 COMEDI_INITCLEANUP(driver_cb_pcimdas);