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
26 * Driver: addi_apci_1032
27 * Description: ADDI-DATA APCI-1032 Digital Input Board
28 * Author: ADDI-DATA GmbH <info@addi-data.com>,
29 * H Hartley Sweeten <hsweeten@visionengravers.com>
31 * Devices: [ADDI-DATA] APCI-1032 (addi_apci_1032)
33 * Configuration options:
34 * None; devices are configured automatically.
36 * This driver models the APCI-1032 as a 32-channel, digital input subdevice
37 * plus an additional digital input subdevice to handle change-of-state (COS)
38 * interrupts (if an interrupt handler can be set up successfully).
40 * The COS subdevice supports comedi asynchronous read commands.
42 * Change-Of-State (COS) interrupt configuration:
44 * Channels 0 to 15 are interruptible. These channels can be configured
45 * to generate interrupts based on AND/OR logic for the desired channels.
48 * - reacts to rising or falling edges
49 * - interrupt is generated when any enabled channel meets the desired
53 * - reacts to changes in level of the selected inputs
54 * - interrupt is generated when all enabled channels meet the desired
56 * - after an interrupt, a change in level must occur on the selected
57 * inputs to release the IRQ logic
59 * The COS subdevice must be configured before setting up a comedi
60 * asynchronous command:
62 * data[0] : INSN_CONFIG_DIGITAL_TRIG
63 * data[1] : trigger number (= 0)
64 * data[2] : configuration operation:
65 * - COMEDI_DIGITAL_TRIG_DISABLE = no interrupts
66 * - COMEDI_DIGITAL_TRIG_ENABLE_EDGES = OR (edge) interrupts
67 * - COMEDI_DIGITAL_TRIG_ENABLE_LEVELS = AND (level) interrupts
68 * data[3] : left-shift for data[4] and data[5]
69 * data[4] : rising-edge/high level channels
70 * data[5] : falling-edge/low level channels
73 #include <linux/module.h>
74 #include <linux/interrupt.h>
76 #include "../comedi_pci.h"
77 #include "amcc_s5933.h"
82 #define APCI1032_DI_REG 0x00
83 #define APCI1032_MODE1_REG 0x04
84 #define APCI1032_MODE2_REG 0x08
85 #define APCI1032_STATUS_REG 0x0c
86 #define APCI1032_CTRL_REG 0x10
87 #define APCI1032_CTRL_INT_MODE(x) (((x) & 0x1) << 1)
88 #define APCI1032_CTRL_INT_OR APCI1032_CTRL_INT_MODE(0)
89 #define APCI1032_CTRL_INT_AND APCI1032_CTRL_INT_MODE(1)
90 #define APCI1032_CTRL_INT_ENA BIT(2)
92 struct apci1032_private {
93 unsigned long amcc_iobase; /* base of AMCC I/O registers */
94 unsigned int mode1; /* rising-edge/high level channels */
95 unsigned int mode2; /* falling-edge/low level channels */
96 unsigned int ctrl; /* interrupt mode OR (edge) . AND (level) */
99 static int apci1032_reset(struct comedi_device *dev)
101 /* disable the interrupts */
102 outl(0x0, dev->iobase + APCI1032_CTRL_REG);
103 /* Reset the interrupt status register */
104 inl(dev->iobase + APCI1032_STATUS_REG);
105 /* Disable the and/or interrupt */
106 outl(0x0, dev->iobase + APCI1032_MODE1_REG);
107 outl(0x0, dev->iobase + APCI1032_MODE2_REG);
112 static int apci1032_cos_insn_config(struct comedi_device *dev,
113 struct comedi_subdevice *s,
114 struct comedi_insn *insn,
117 struct apci1032_private *devpriv = dev->private;
118 unsigned int shift, oldmask, himask, lomask;
121 case INSN_CONFIG_DIGITAL_TRIG:
126 oldmask = (1U << shift) - 1;
127 himask = data[4] << shift;
128 lomask = data[5] << shift;
130 oldmask = 0xffffffffu;
135 case COMEDI_DIGITAL_TRIG_DISABLE:
141 case COMEDI_DIGITAL_TRIG_ENABLE_EDGES:
142 if (devpriv->ctrl != (APCI1032_CTRL_INT_ENA |
143 APCI1032_CTRL_INT_OR)) {
144 /* switching to 'OR' mode */
145 devpriv->ctrl = APCI1032_CTRL_INT_ENA |
146 APCI1032_CTRL_INT_OR;
147 /* wipe old channels */
151 /* preserve unspecified channels */
152 devpriv->mode1 &= oldmask;
153 devpriv->mode2 &= oldmask;
155 /* configure specified channels */
156 devpriv->mode1 |= himask;
157 devpriv->mode2 |= lomask;
159 case COMEDI_DIGITAL_TRIG_ENABLE_LEVELS:
160 if (devpriv->ctrl != (APCI1032_CTRL_INT_ENA |
161 APCI1032_CTRL_INT_AND)) {
162 /* switching to 'AND' mode */
163 devpriv->ctrl = APCI1032_CTRL_INT_ENA |
164 APCI1032_CTRL_INT_AND;
165 /* wipe old channels */
169 /* preserve unspecified channels */
170 devpriv->mode1 &= oldmask;
171 devpriv->mode2 &= oldmask;
173 /* configure specified channels */
174 devpriv->mode1 |= himask;
175 devpriv->mode2 |= lomask;
188 static int apci1032_cos_insn_bits(struct comedi_device *dev,
189 struct comedi_subdevice *s,
190 struct comedi_insn *insn,
198 static int apci1032_cos_cmdtest(struct comedi_device *dev,
199 struct comedi_subdevice *s,
200 struct comedi_cmd *cmd)
204 /* Step 1 : check if triggers are trivially valid */
206 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
207 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
208 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
209 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
210 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
215 /* Step 2a : make sure trigger sources are unique */
216 /* Step 2b : and mutually compatible */
218 /* Step 3: check if arguments are trivially valid */
220 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
221 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
222 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
223 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
225 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
230 /* Step 4: fix up any arguments */
232 /* Step 5: check channel list if it exists */
238 * Change-Of-State (COS) 'do_cmd' operation
240 * Enable the COS interrupt as configured by apci1032_cos_insn_config().
242 static int apci1032_cos_cmd(struct comedi_device *dev,
243 struct comedi_subdevice *s)
245 struct apci1032_private *devpriv = dev->private;
247 if (!devpriv->ctrl) {
248 dev_warn(dev->class_dev,
249 "Interrupts disabled due to mode configuration!\n");
253 outl(devpriv->mode1, dev->iobase + APCI1032_MODE1_REG);
254 outl(devpriv->mode2, dev->iobase + APCI1032_MODE2_REG);
255 outl(devpriv->ctrl, dev->iobase + APCI1032_CTRL_REG);
260 static int apci1032_cos_cancel(struct comedi_device *dev,
261 struct comedi_subdevice *s)
263 return apci1032_reset(dev);
266 static irqreturn_t apci1032_interrupt(int irq, void *d)
268 struct comedi_device *dev = d;
269 struct apci1032_private *devpriv = dev->private;
270 struct comedi_subdevice *s = dev->read_subdev;
274 /* check interrupt is from this device */
275 if ((inl(devpriv->amcc_iobase + AMCC_OP_REG_INTCSR) &
276 INTCSR_INTR_ASSERTED) == 0)
279 /* check interrupt is enabled */
280 ctrl = inl(dev->iobase + APCI1032_CTRL_REG);
281 if ((ctrl & APCI1032_CTRL_INT_ENA) == 0)
284 /* disable the interrupt */
285 outl(ctrl & ~APCI1032_CTRL_INT_ENA, dev->iobase + APCI1032_CTRL_REG);
287 s->state = inl(dev->iobase + APCI1032_STATUS_REG) & 0xffff;
289 comedi_buf_write_samples(s, &val, 1);
290 comedi_handle_events(dev, s);
292 /* enable the interrupt */
293 outl(ctrl, dev->iobase + APCI1032_CTRL_REG);
298 static int apci1032_di_insn_bits(struct comedi_device *dev,
299 struct comedi_subdevice *s,
300 struct comedi_insn *insn,
303 data[1] = inl(dev->iobase + APCI1032_DI_REG);
308 static int apci1032_auto_attach(struct comedi_device *dev,
309 unsigned long context_unused)
311 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
312 struct apci1032_private *devpriv;
313 struct comedi_subdevice *s;
316 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
320 ret = comedi_pci_enable(dev);
324 devpriv->amcc_iobase = pci_resource_start(pcidev, 0);
325 dev->iobase = pci_resource_start(pcidev, 1);
327 if (pcidev->irq > 0) {
328 ret = request_irq(pcidev->irq, apci1032_interrupt, IRQF_SHARED,
329 dev->board_name, dev);
331 dev->irq = pcidev->irq;
334 ret = comedi_alloc_subdevices(dev, 2);
338 /* Allocate and Initialise DI Subdevice Structures */
339 s = &dev->subdevices[0];
340 s->type = COMEDI_SUBD_DI;
341 s->subdev_flags = SDF_READABLE;
344 s->range_table = &range_digital;
345 s->insn_bits = apci1032_di_insn_bits;
347 /* Change-Of-State (COS) interrupt subdevice */
348 s = &dev->subdevices[1];
350 dev->read_subdev = s;
351 s->type = COMEDI_SUBD_DI;
352 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
355 s->range_table = &range_digital;
356 s->insn_config = apci1032_cos_insn_config;
357 s->insn_bits = apci1032_cos_insn_bits;
359 s->do_cmdtest = apci1032_cos_cmdtest;
360 s->do_cmd = apci1032_cos_cmd;
361 s->cancel = apci1032_cos_cancel;
363 s->type = COMEDI_SUBD_UNUSED;
369 static void apci1032_detach(struct comedi_device *dev)
373 comedi_pci_detach(dev);
376 static struct comedi_driver apci1032_driver = {
377 .driver_name = "addi_apci_1032",
378 .module = THIS_MODULE,
379 .auto_attach = apci1032_auto_attach,
380 .detach = apci1032_detach,
383 static int apci1032_pci_probe(struct pci_dev *dev,
384 const struct pci_device_id *id)
386 return comedi_pci_auto_config(dev, &apci1032_driver, id->driver_data);
389 static const struct pci_device_id apci1032_pci_table[] = {
390 { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1003) },
393 MODULE_DEVICE_TABLE(pci, apci1032_pci_table);
395 static struct pci_driver apci1032_pci_driver = {
396 .name = "addi_apci_1032",
397 .id_table = apci1032_pci_table,
398 .probe = apci1032_pci_probe,
399 .remove = comedi_pci_auto_unconfig,
401 module_comedi_pci_driver(apci1032_driver, apci1032_pci_driver);
403 MODULE_AUTHOR("Comedi http://www.comedi.org");
404 MODULE_DESCRIPTION("ADDI-DATA APCI-1032, 32 channel DI boards");
405 MODULE_LICENSE("GPL");