linux/drivers/staging/comedi/drivers/addi_apci_2032.c
<<
>>
Prefs
   1/*
   2 * addi_apci_2032.c
   3 * Copyright (C) 2004,2005  ADDI-DATA GmbH for the source code of this module.
   4 * Project manager: Eric Stolz
   5 *
   6 *      ADDI-DATA GmbH
   7 *      Dieselstrasse 3
   8 *      D-77833 Ottersweier
   9 *      Tel: +19(0)7223/9493-0
  10 *      Fax: +49(0)7223/9493-92
  11 *      http://www.addi-data.com
  12 *      info@addi-data.com
  13 *
  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.
  18 *
  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
  22 * more details.
  23 */
  24
  25#include <linux/module.h>
  26#include <linux/pci.h>
  27#include <linux/interrupt.h>
  28#include <linux/slab.h>
  29
  30#include "../comedidev.h"
  31#include "addi_watchdog.h"
  32#include "comedi_fc.h"
  33
  34/*
  35 * PCI bar 1 I/O Register map
  36 */
  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
  47
  48struct apci2032_int_private {
  49        spinlock_t spinlock;
  50        bool active;
  51        unsigned char enabled_isns;
  52};
  53
  54static int apci2032_do_insn_bits(struct comedi_device *dev,
  55                                 struct comedi_subdevice *s,
  56                                 struct comedi_insn *insn,
  57                                 unsigned int *data)
  58{
  59        s->state = inl(dev->iobase + APCI2032_DO_REG);
  60
  61        if (comedi_dio_update_state(s, data))
  62                outl(s->state, dev->iobase + APCI2032_DO_REG);
  63
  64        data[1] = s->state;
  65
  66        return insn->n;
  67}
  68
  69static int apci2032_int_insn_bits(struct comedi_device *dev,
  70                                  struct comedi_subdevice *s,
  71                                  struct comedi_insn *insn,
  72                                  unsigned int *data)
  73{
  74        data[1] = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3;
  75        return insn->n;
  76}
  77
  78static void apci2032_int_stop(struct comedi_device *dev,
  79                              struct comedi_subdevice *s)
  80{
  81        struct apci2032_int_private *subpriv = s->private;
  82
  83        subpriv->active = false;
  84        subpriv->enabled_isns = 0;
  85        outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
  86}
  87
  88static int apci2032_int_cmdtest(struct comedi_device *dev,
  89                                struct comedi_subdevice *s,
  90                                struct comedi_cmd *cmd)
  91{
  92        int err = 0;
  93
  94        /* Step 1 : check if triggers are trivially valid */
  95
  96        err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
  97        err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
  98        err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
  99        err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 100        err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 101
 102        if (err)
 103                return 1;
 104
 105        /* Step 2a : make sure trigger sources are unique */
 106        err |= cfc_check_trigger_is_unique(cmd->stop_src);
 107
 108        /* Step 2b : and mutually compatible */
 109
 110        if (err)
 111                return 2;
 112
 113        /* Step 3: check if arguments are trivially valid */
 114
 115        err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
 116        err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 117        err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
 118        err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
 119        if (cmd->stop_src == TRIG_COUNT)
 120                err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1);
 121        else    /* TRIG_NONE */
 122                err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
 123
 124        if (err)
 125                return 3;
 126
 127        /* Step 4: fix up any arguments */
 128
 129        /* Step 5: check channel list if it exists */
 130
 131        return 0;
 132}
 133
 134static int apci2032_int_cmd(struct comedi_device *dev,
 135                            struct comedi_subdevice *s)
 136{
 137        struct comedi_cmd *cmd = &s->async->cmd;
 138        struct apci2032_int_private *subpriv = s->private;
 139        unsigned char enabled_isns;
 140        unsigned int n;
 141        unsigned long flags;
 142
 143        enabled_isns = 0;
 144        for (n = 0; n < cmd->chanlist_len; n++)
 145                enabled_isns |= 1 << CR_CHAN(cmd->chanlist[n]);
 146
 147        spin_lock_irqsave(&subpriv->spinlock, flags);
 148
 149        subpriv->enabled_isns = enabled_isns;
 150        subpriv->active = true;
 151        outl(enabled_isns, dev->iobase + APCI2032_INT_CTRL_REG);
 152
 153        spin_unlock_irqrestore(&subpriv->spinlock, flags);
 154
 155        return 0;
 156}
 157
 158static int apci2032_int_cancel(struct comedi_device *dev,
 159                               struct comedi_subdevice *s)
 160{
 161        struct apci2032_int_private *subpriv = s->private;
 162        unsigned long flags;
 163
 164        spin_lock_irqsave(&subpriv->spinlock, flags);
 165        if (subpriv->active)
 166                apci2032_int_stop(dev, s);
 167        spin_unlock_irqrestore(&subpriv->spinlock, flags);
 168
 169        return 0;
 170}
 171
 172static irqreturn_t apci2032_interrupt(int irq, void *d)
 173{
 174        struct comedi_device *dev = d;
 175        struct comedi_subdevice *s = dev->read_subdev;
 176        struct comedi_cmd *cmd = &s->async->cmd;
 177        struct apci2032_int_private *subpriv;
 178        unsigned int val;
 179
 180        if (!dev->attached)
 181                return IRQ_NONE;
 182
 183        /* Check if VCC OR CC interrupt has occurred */
 184        val = inl(dev->iobase + APCI2032_STATUS_REG) & APCI2032_STATUS_IRQ;
 185        if (!val)
 186                return IRQ_NONE;
 187
 188        subpriv = s->private;
 189        spin_lock(&subpriv->spinlock);
 190
 191        val = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3;
 192        /* Disable triggered interrupt sources. */
 193        outl(~val & 3, dev->iobase + APCI2032_INT_CTRL_REG);
 194        /*
 195         * Note: We don't reenable the triggered interrupt sources because they
 196         * are level-sensitive, hardware error status interrupt sources and
 197         * they'd keep triggering interrupts repeatedly.
 198         */
 199
 200        if (subpriv->active && (val & subpriv->enabled_isns) != 0) {
 201                unsigned short bits = 0;
 202                int i;
 203
 204                /* Bits in scan data correspond to indices in channel list. */
 205                for (i = 0; i < cmd->chanlist_len; i++) {
 206                        unsigned int chan = CR_CHAN(cmd->chanlist[i]);
 207
 208                        if (val & (1 << chan))
 209                                bits |= (1 << i);
 210                }
 211
 212                comedi_buf_write_samples(s, &bits, 1);
 213
 214                if (cmd->stop_src == TRIG_COUNT &&
 215                    s->async->scans_done >= cmd->stop_arg)
 216                        s->async->events |= COMEDI_CB_EOA;
 217        }
 218
 219        spin_unlock(&subpriv->spinlock);
 220
 221        comedi_handle_events(dev, s);
 222
 223        return IRQ_HANDLED;
 224}
 225
 226static int apci2032_reset(struct comedi_device *dev)
 227{
 228        outl(0x0, dev->iobase + APCI2032_DO_REG);
 229        outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
 230
 231        addi_watchdog_reset(dev->iobase + APCI2032_WDOG_REG);
 232
 233        return 0;
 234}
 235
 236static int apci2032_auto_attach(struct comedi_device *dev,
 237                                unsigned long context_unused)
 238{
 239        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 240        struct comedi_subdevice *s;
 241        int ret;
 242
 243        ret = comedi_pci_enable(dev);
 244        if (ret)
 245                return ret;
 246        dev->iobase = pci_resource_start(pcidev, 1);
 247        apci2032_reset(dev);
 248
 249        if (pcidev->irq > 0) {
 250                ret = request_irq(pcidev->irq, apci2032_interrupt,
 251                                  IRQF_SHARED, dev->board_name, dev);
 252                if (ret == 0)
 253                        dev->irq = pcidev->irq;
 254        }
 255
 256        ret = comedi_alloc_subdevices(dev, 3);
 257        if (ret)
 258                return ret;
 259
 260        /* Initialize the digital output subdevice */
 261        s = &dev->subdevices[0];
 262        s->type         = COMEDI_SUBD_DO;
 263        s->subdev_flags = SDF_WRITABLE;
 264        s->n_chan       = 32;
 265        s->maxdata      = 1;
 266        s->range_table  = &range_digital;
 267        s->insn_bits    = apci2032_do_insn_bits;
 268
 269        /* Initialize the watchdog subdevice */
 270        s = &dev->subdevices[1];
 271        ret = addi_watchdog_init(s, dev->iobase + APCI2032_WDOG_REG);
 272        if (ret)
 273                return ret;
 274
 275        /* Initialize the interrupt subdevice */
 276        s = &dev->subdevices[2];
 277        s->type         = COMEDI_SUBD_DI;
 278        s->subdev_flags = SDF_READABLE;
 279        s->n_chan       = 2;
 280        s->maxdata      = 1;
 281        s->range_table  = &range_digital;
 282        s->insn_bits    = apci2032_int_insn_bits;
 283        if (dev->irq) {
 284                struct apci2032_int_private *subpriv;
 285
 286                dev->read_subdev = s;
 287                subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
 288                if (!subpriv)
 289                        return -ENOMEM;
 290                spin_lock_init(&subpriv->spinlock);
 291                s->private      = subpriv;
 292                s->subdev_flags = SDF_READABLE | SDF_CMD_READ | SDF_PACKED;
 293                s->len_chanlist = 2;
 294                s->do_cmdtest   = apci2032_int_cmdtest;
 295                s->do_cmd       = apci2032_int_cmd;
 296                s->cancel       = apci2032_int_cancel;
 297        }
 298
 299        return 0;
 300}
 301
 302static void apci2032_detach(struct comedi_device *dev)
 303{
 304        if (dev->iobase)
 305                apci2032_reset(dev);
 306        comedi_pci_detach(dev);
 307        if (dev->read_subdev)
 308                kfree(dev->read_subdev->private);
 309}
 310
 311static struct comedi_driver apci2032_driver = {
 312        .driver_name    = "addi_apci_2032",
 313        .module         = THIS_MODULE,
 314        .auto_attach    = apci2032_auto_attach,
 315        .detach         = apci2032_detach,
 316};
 317
 318static int apci2032_pci_probe(struct pci_dev *dev,
 319                              const struct pci_device_id *id)
 320{
 321        return comedi_pci_auto_config(dev, &apci2032_driver, id->driver_data);
 322}
 323
 324static const struct pci_device_id apci2032_pci_table[] = {
 325        { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1004) },
 326        { 0 }
 327};
 328MODULE_DEVICE_TABLE(pci, apci2032_pci_table);
 329
 330static struct pci_driver apci2032_pci_driver = {
 331        .name           = "addi_apci_2032",
 332        .id_table       = apci2032_pci_table,
 333        .probe          = apci2032_pci_probe,
 334        .remove         = comedi_pci_auto_unconfig,
 335};
 336module_comedi_pci_driver(apci2032_driver, apci2032_pci_driver);
 337
 338MODULE_AUTHOR("Comedi http://www.comedi.org");
 339MODULE_DESCRIPTION("ADDI-DATA APCI-2032, 32 channel DO boards");
 340MODULE_LICENSE("GPL");
 341
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.