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/interrupt.h>
27 #include <linux/slab.h>
29 #include "../comedi_pci.h"
30 #include "addi_watchdog.h"
33 * PCI bar 1 I/O Register map
35 #define APCI2032_DO_REG 0x00
36 #define APCI2032_INT_CTRL_REG 0x04
37 #define APCI2032_INT_CTRL_VCC_ENA (1 << 0)
38 #define APCI2032_INT_CTRL_CC_ENA (1 << 1)
39 #define APCI2032_INT_STATUS_REG 0x08
40 #define APCI2032_INT_STATUS_VCC (1 << 0)
41 #define APCI2032_INT_STATUS_CC (1 << 1)
42 #define APCI2032_STATUS_REG 0x0c
43 #define APCI2032_STATUS_IRQ (1 << 0)
44 #define APCI2032_WDOG_REG 0x10
46 struct apci2032_int_private {
49 unsigned char enabled_isns;
52 static int apci2032_do_insn_bits(struct comedi_device *dev,
53 struct comedi_subdevice *s,
54 struct comedi_insn *insn,
57 s->state = inl(dev->iobase + APCI2032_DO_REG);
59 if (comedi_dio_update_state(s, data))
60 outl(s->state, dev->iobase + APCI2032_DO_REG);
67 static int apci2032_int_insn_bits(struct comedi_device *dev,
68 struct comedi_subdevice *s,
69 struct comedi_insn *insn,
72 data[1] = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3;
76 static void apci2032_int_stop(struct comedi_device *dev,
77 struct comedi_subdevice *s)
79 struct apci2032_int_private *subpriv = s->private;
81 subpriv->active = false;
82 subpriv->enabled_isns = 0;
83 outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
86 static int apci2032_int_cmdtest(struct comedi_device *dev,
87 struct comedi_subdevice *s,
88 struct comedi_cmd *cmd)
92 /* Step 1 : check if triggers are trivially valid */
94 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
95 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
96 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
97 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
98 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
103 /* Step 2a : make sure trigger sources are unique */
104 err |= comedi_check_trigger_is_unique(cmd->stop_src);
106 /* Step 2b : and mutually compatible */
111 /* Step 3: check if arguments are trivially valid */
113 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
114 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
115 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
116 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
118 if (cmd->stop_src == TRIG_COUNT)
119 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
121 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
126 /* Step 4: fix up any arguments */
128 /* Step 5: check channel list if it exists */
133 static int apci2032_int_cmd(struct comedi_device *dev,
134 struct comedi_subdevice *s)
136 struct comedi_cmd *cmd = &s->async->cmd;
137 struct apci2032_int_private *subpriv = s->private;
138 unsigned char enabled_isns;
143 for (n = 0; n < cmd->chanlist_len; n++)
144 enabled_isns |= 1 << CR_CHAN(cmd->chanlist[n]);
146 spin_lock_irqsave(&subpriv->spinlock, flags);
148 subpriv->enabled_isns = enabled_isns;
149 subpriv->active = true;
150 outl(enabled_isns, dev->iobase + APCI2032_INT_CTRL_REG);
152 spin_unlock_irqrestore(&subpriv->spinlock, flags);
157 static int apci2032_int_cancel(struct comedi_device *dev,
158 struct comedi_subdevice *s)
160 struct apci2032_int_private *subpriv = s->private;
163 spin_lock_irqsave(&subpriv->spinlock, flags);
165 apci2032_int_stop(dev, s);
166 spin_unlock_irqrestore(&subpriv->spinlock, flags);
171 static irqreturn_t apci2032_interrupt(int irq, void *d)
173 struct comedi_device *dev = d;
174 struct comedi_subdevice *s = dev->read_subdev;
175 struct comedi_cmd *cmd = &s->async->cmd;
176 struct apci2032_int_private *subpriv;
182 /* Check if VCC OR CC interrupt has occurred */
183 val = inl(dev->iobase + APCI2032_STATUS_REG) & APCI2032_STATUS_IRQ;
187 subpriv = s->private;
188 spin_lock(&subpriv->spinlock);
190 val = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3;
191 /* Disable triggered interrupt sources. */
192 outl(~val & 3, dev->iobase + APCI2032_INT_CTRL_REG);
194 * Note: We don't reenable the triggered interrupt sources because they
195 * are level-sensitive, hardware error status interrupt sources and
196 * they'd keep triggering interrupts repeatedly.
199 if (subpriv->active && (val & subpriv->enabled_isns) != 0) {
200 unsigned short bits = 0;
203 /* Bits in scan data correspond to indices in channel list. */
204 for (i = 0; i < cmd->chanlist_len; i++) {
205 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
207 if (val & (1 << chan))
211 comedi_buf_write_samples(s, &bits, 1);
213 if (cmd->stop_src == TRIG_COUNT &&
214 s->async->scans_done >= cmd->stop_arg)
215 s->async->events |= COMEDI_CB_EOA;
218 spin_unlock(&subpriv->spinlock);
220 comedi_handle_events(dev, s);
225 static int apci2032_reset(struct comedi_device *dev)
227 outl(0x0, dev->iobase + APCI2032_DO_REG);
228 outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
230 addi_watchdog_reset(dev->iobase + APCI2032_WDOG_REG);
235 static int apci2032_auto_attach(struct comedi_device *dev,
236 unsigned long context_unused)
238 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
239 struct comedi_subdevice *s;
242 ret = comedi_pci_enable(dev);
245 dev->iobase = pci_resource_start(pcidev, 1);
248 if (pcidev->irq > 0) {
249 ret = request_irq(pcidev->irq, apci2032_interrupt,
250 IRQF_SHARED, dev->board_name, dev);
252 dev->irq = pcidev->irq;
255 ret = comedi_alloc_subdevices(dev, 3);
259 /* Initialize the digital output subdevice */
260 s = &dev->subdevices[0];
261 s->type = COMEDI_SUBD_DO;
262 s->subdev_flags = SDF_WRITABLE;
265 s->range_table = &range_digital;
266 s->insn_bits = apci2032_do_insn_bits;
268 /* Initialize the watchdog subdevice */
269 s = &dev->subdevices[1];
270 ret = addi_watchdog_init(s, dev->iobase + APCI2032_WDOG_REG);
274 /* Initialize the interrupt subdevice */
275 s = &dev->subdevices[2];
276 s->type = COMEDI_SUBD_DI;
277 s->subdev_flags = SDF_READABLE;
280 s->range_table = &range_digital;
281 s->insn_bits = apci2032_int_insn_bits;
283 struct apci2032_int_private *subpriv;
285 dev->read_subdev = s;
286 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
289 spin_lock_init(&subpriv->spinlock);
290 s->private = subpriv;
291 s->subdev_flags = SDF_READABLE | SDF_CMD_READ | SDF_PACKED;
293 s->do_cmdtest = apci2032_int_cmdtest;
294 s->do_cmd = apci2032_int_cmd;
295 s->cancel = apci2032_int_cancel;
301 static void apci2032_detach(struct comedi_device *dev)
305 comedi_pci_detach(dev);
306 if (dev->read_subdev)
307 kfree(dev->read_subdev->private);
310 static struct comedi_driver apci2032_driver = {
311 .driver_name = "addi_apci_2032",
312 .module = THIS_MODULE,
313 .auto_attach = apci2032_auto_attach,
314 .detach = apci2032_detach,
317 static int apci2032_pci_probe(struct pci_dev *dev,
318 const struct pci_device_id *id)
320 return comedi_pci_auto_config(dev, &apci2032_driver, id->driver_data);
323 static const struct pci_device_id apci2032_pci_table[] = {
324 { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1004) },
327 MODULE_DEVICE_TABLE(pci, apci2032_pci_table);
329 static struct pci_driver apci2032_pci_driver = {
330 .name = "addi_apci_2032",
331 .id_table = apci2032_pci_table,
332 .probe = apci2032_pci_probe,
333 .remove = comedi_pci_auto_unconfig,
335 module_comedi_pci_driver(apci2032_driver, apci2032_pci_driver);
337 MODULE_AUTHOR("Comedi http://www.comedi.org");
338 MODULE_DESCRIPTION("ADDI-DATA APCI-2032, 32 channel DO boards");
339 MODULE_LICENSE("GPL");