3 * Copyright (C) 2004,2005 ADDI-DATA GmbH for the source code of this module.
4 * Project manager: Eric Stolz
9 * Tel: +19(0)7223/9493-0
10 * Fax: +49(0)7223/9493-92
11 * http://www.addi-data.com
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
19 * This program is distributed in the hope that it will be useful, but WITHOUT
20 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
25 #include <linux/module.h>
26 #include <linux/pci.h>
27 #include <linux/interrupt.h>
28 #include <linux/slab.h>
30 #include "../comedidev.h"
31 #include "addi_watchdog.h"
32 #include "comedi_fc.h"
35 * PCI bar 1 I/O Register map
37 #define APCI2032_DO_REG 0x00
38 #define APCI2032_INT_CTRL_REG 0x04
39 #define APCI2032_INT_CTRL_VCC_ENA (1 << 0)
40 #define APCI2032_INT_CTRL_CC_ENA (1 << 1)
41 #define APCI2032_INT_STATUS_REG 0x08
42 #define APCI2032_INT_STATUS_VCC (1 << 0)
43 #define APCI2032_INT_STATUS_CC (1 << 1)
44 #define APCI2032_STATUS_REG 0x0c
45 #define APCI2032_STATUS_IRQ (1 << 0)
46 #define APCI2032_WDOG_REG 0x10
48 struct apci2032_int_private {
50 unsigned int stop_count;
52 unsigned char enabled_isns;
55 static int apci2032_do_insn_bits(struct comedi_device *dev,
56 struct comedi_subdevice *s,
57 struct comedi_insn *insn,
60 s->state = inl(dev->iobase + APCI2032_DO_REG);
62 if (comedi_dio_update_state(s, data))
63 outl(s->state, dev->iobase + APCI2032_DO_REG);
70 static int apci2032_int_insn_bits(struct comedi_device *dev,
71 struct comedi_subdevice *s,
72 struct comedi_insn *insn,
75 data[1] = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3;
79 static void apci2032_int_stop(struct comedi_device *dev,
80 struct comedi_subdevice *s)
82 struct apci2032_int_private *subpriv = s->private;
84 subpriv->active = false;
85 subpriv->enabled_isns = 0;
86 outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
89 static bool apci2032_int_start(struct comedi_device *dev,
90 struct comedi_subdevice *s,
91 unsigned char enabled_isns)
93 struct apci2032_int_private *subpriv = s->private;
94 struct comedi_cmd *cmd = &s->async->cmd;
97 subpriv->enabled_isns = enabled_isns;
98 subpriv->stop_count = cmd->stop_arg;
99 if (cmd->stop_src == TRIG_COUNT && subpriv->stop_count == 0) {
100 /* An empty acquisition! */
101 s->async->events |= COMEDI_CB_EOA;
102 subpriv->active = false;
105 subpriv->active = true;
106 outl(enabled_isns, dev->iobase + APCI2032_INT_CTRL_REG);
113 static int apci2032_int_cmdtest(struct comedi_device *dev,
114 struct comedi_subdevice *s,
115 struct comedi_cmd *cmd)
119 /* Step 1 : check if triggers are trivially valid */
121 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
122 err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
123 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
124 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
125 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
130 /* Step 2a : make sure trigger sources are unique */
131 err |= cfc_check_trigger_is_unique(cmd->stop_src);
133 /* Step 2b : and mutually compatible */
138 /* Step 3: check if arguments are trivially valid */
140 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
141 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
142 err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
143 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
144 if (cmd->stop_src == TRIG_NONE)
145 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
150 /* step 4: ignored */
158 static int apci2032_int_cmd(struct comedi_device *dev,
159 struct comedi_subdevice *s)
161 struct comedi_cmd *cmd = &s->async->cmd;
162 struct apci2032_int_private *subpriv = s->private;
163 unsigned char enabled_isns;
169 for (n = 0; n < cmd->chanlist_len; n++)
170 enabled_isns |= 1 << CR_CHAN(cmd->chanlist[n]);
172 spin_lock_irqsave(&subpriv->spinlock, flags);
173 do_event = apci2032_int_start(dev, s, enabled_isns);
174 spin_unlock_irqrestore(&subpriv->spinlock, flags);
177 comedi_event(dev, s);
182 static int apci2032_int_cancel(struct comedi_device *dev,
183 struct comedi_subdevice *s)
185 struct apci2032_int_private *subpriv = s->private;
188 spin_lock_irqsave(&subpriv->spinlock, flags);
190 apci2032_int_stop(dev, s);
191 spin_unlock_irqrestore(&subpriv->spinlock, flags);
196 static irqreturn_t apci2032_interrupt(int irq, void *d)
198 struct comedi_device *dev = d;
199 struct comedi_subdevice *s = dev->read_subdev;
200 struct apci2032_int_private *subpriv;
202 bool do_event = false;
207 /* Check if VCC OR CC interrupt has occurred */
208 val = inl(dev->iobase + APCI2032_STATUS_REG) & APCI2032_STATUS_IRQ;
212 subpriv = s->private;
213 spin_lock(&subpriv->spinlock);
215 val = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3;
216 /* Disable triggered interrupt sources. */
217 outl(~val & 3, dev->iobase + APCI2032_INT_CTRL_REG);
219 * Note: We don't reenable the triggered interrupt sources because they
220 * are level-sensitive, hardware error status interrupt sources and
221 * they'd keep triggering interrupts repeatedly.
224 if (subpriv->active && (val & subpriv->enabled_isns) != 0) {
227 unsigned int *chanlist;
229 /* Bits in scan data correspond to indices in channel list. */
231 len = s->async->cmd.chanlist_len;
232 chanlist = &s->async->cmd.chanlist[0];
233 for (n = 0; n < len; n++)
234 if ((val & (1U << CR_CHAN(chanlist[n]))) != 0)
237 if (comedi_buf_put(s->async, bits)) {
238 s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;
239 if (s->async->cmd.stop_src == TRIG_COUNT &&
240 subpriv->stop_count > 0) {
241 subpriv->stop_count--;
242 if (subpriv->stop_count == 0) {
243 /* end of acquisition */
244 s->async->events |= COMEDI_CB_EOA;
245 apci2032_int_stop(dev, s);
249 apci2032_int_stop(dev, s);
250 s->async->events |= COMEDI_CB_OVERFLOW;
255 spin_unlock(&subpriv->spinlock);
257 comedi_event(dev, s);
262 static int apci2032_reset(struct comedi_device *dev)
264 outl(0x0, dev->iobase + APCI2032_DO_REG);
265 outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
267 addi_watchdog_reset(dev->iobase + APCI2032_WDOG_REG);
272 static int apci2032_auto_attach(struct comedi_device *dev,
273 unsigned long context_unused)
275 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
276 struct comedi_subdevice *s;
279 ret = comedi_pci_enable(dev);
282 dev->iobase = pci_resource_start(pcidev, 1);
285 if (pcidev->irq > 0) {
286 ret = request_irq(pcidev->irq, apci2032_interrupt,
287 IRQF_SHARED, dev->board_name, dev);
289 dev->irq = pcidev->irq;
292 ret = comedi_alloc_subdevices(dev, 3);
296 /* Initialize the digital output subdevice */
297 s = &dev->subdevices[0];
298 s->type = COMEDI_SUBD_DO;
299 s->subdev_flags = SDF_WRITEABLE;
302 s->range_table = &range_digital;
303 s->insn_bits = apci2032_do_insn_bits;
305 /* Initialize the watchdog subdevice */
306 s = &dev->subdevices[1];
307 ret = addi_watchdog_init(s, dev->iobase + APCI2032_WDOG_REG);
311 /* Initialize the interrupt subdevice */
312 s = &dev->subdevices[2];
313 s->type = COMEDI_SUBD_DI;
314 s->subdev_flags = SDF_READABLE;
317 s->range_table = &range_digital;
318 s->insn_bits = apci2032_int_insn_bits;
320 struct apci2032_int_private *subpriv;
322 dev->read_subdev = s;
323 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
326 spin_lock_init(&subpriv->spinlock);
327 s->private = subpriv;
328 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
330 s->do_cmdtest = apci2032_int_cmdtest;
331 s->do_cmd = apci2032_int_cmd;
332 s->cancel = apci2032_int_cancel;
338 static void apci2032_detach(struct comedi_device *dev)
343 free_irq(dev->irq, dev);
344 if (dev->read_subdev)
345 kfree(dev->read_subdev->private);
346 comedi_pci_disable(dev);
349 static struct comedi_driver apci2032_driver = {
350 .driver_name = "addi_apci_2032",
351 .module = THIS_MODULE,
352 .auto_attach = apci2032_auto_attach,
353 .detach = apci2032_detach,
356 static int apci2032_pci_probe(struct pci_dev *dev,
357 const struct pci_device_id *id)
359 return comedi_pci_auto_config(dev, &apci2032_driver, id->driver_data);
362 static const struct pci_device_id apci2032_pci_table[] = {
363 { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1004) },
366 MODULE_DEVICE_TABLE(pci, apci2032_pci_table);
368 static struct pci_driver apci2032_pci_driver = {
369 .name = "addi_apci_2032",
370 .id_table = apci2032_pci_table,
371 .probe = apci2032_pci_probe,
372 .remove = comedi_pci_auto_unconfig,
374 module_comedi_pci_driver(apci2032_driver, apci2032_pci_driver);
376 MODULE_AUTHOR("Comedi http://www.comedi.org");
377 MODULE_DESCRIPTION("Comedi low-level driver");
378 MODULE_LICENSE("GPL");