drivers/staging/comedi/drivers/pcl730.c

   1 /*
   2  * comedi/drivers/pcl730.c
   3  * Driver for Advantech PCL-730 and clones
   4  * José Luis Sánchez
   5  */
   6 /*
   7 Driver: pcl730
   8 Description: Advantech PCL-730 (& compatibles)
   9 Author: José Luis Sánchez (jsanchezv@teleline.es)
  10 Status: untested
  11 Devices: [Advantech] PCL-730 (pcl730), [ICP] ISO-730 (iso730),
  12                  [Adlink] ACL-7130 (acl7130)
  13
  14 Interrupts are not supported.
  15 The ACL-7130 card have an 8254 timer/counter not supported by this driver.
  16 */
  17
  18 #include "../comedidev.h"
  19
  20 #include <linux/ioport.h>
  21
  22 #define PCL730_SIZE             4
  23 #define ACL7130_SIZE    8
  24 #define PCL730_IDIO_LO  0       /* Isolated Digital I/O low byte (ID0-ID7) */
  25 #define PCL730_IDIO_HI  1       /* Isolated Digital I/O high byte (ID8-ID15) */
  26 #define PCL730_DIO_LO   2       /* TTL Digital I/O low byte (D0-D7) */
  27 #define PCL730_DIO_HI   3       /* TTL Digital I/O high byte (D8-D15) */
  28
  29 struct pcl730_board {
  30
  31         const char *name;       /*  board name */
  32         unsigned int io_range;  /*  len of I/O space */
  33 };
  34
  35 static int pcl730_do_insn(struct comedi_device *dev, struct comedi_subdevice *s,
  36                           struct comedi_insn *insn, unsigned int *data)
  37 {
  38         if (data[0]) {
  39                 s->state &= ~data[0];
  40                 s->state |= (data[0] & data[1]);
  41         }
  42         if (data[0] & 0x00ff)
  43                 outb(s->state & 0xff,
  44                      dev->iobase + ((unsigned long)s->private));
  45         if (data[0] & 0xff00)
  46                 outb((s->state >> 8),
  47                      dev->iobase + ((unsigned long)s->private) + 1);
  48
  49         data[1] = s->state;
  50
  51         return insn->n;
  52 }
  53
  54 static int pcl730_di_insn(struct comedi_device *dev, struct comedi_subdevice *s,
  55                           struct comedi_insn *insn, unsigned int *data)
  56 {
  57         data[1] = inb(dev->iobase + ((unsigned long)s->private)) |
  58             (inb(dev->iobase + ((unsigned long)s->private) + 1) << 8);
  59
  60         return insn->n;
  61 }
  62
  63 static int pcl730_attach(struct comedi_device *dev, struct comedi_devconfig *it)
  64 {
  65         const struct pcl730_board *board = comedi_board(dev);
  66         struct comedi_subdevice *s;
  67         unsigned long iobase;
  68         unsigned int iorange;
  69         int ret;
  70
  71         iobase = it->options[0];
  72         iorange = board->io_range;
  73         printk(KERN_INFO "comedi%d: pcl730: board=%s 0x%04lx ", dev->minor,
  74                board->name, iobase);
  75         if (!request_region(iobase, iorange, "pcl730")) {
  76                 printk("I/O port conflict\n");
  77                 return -EIO;
  78         }
  79         dev->board_name = board->name;
  80         dev->iobase = iobase;
  81         dev->irq = 0;
  82
  83         ret = comedi_alloc_subdevices(dev, 4);
  84         if (ret)
  85                 return ret;
  86
  87         s = dev->subdevices + 0;
  88         /* Isolated do */
  89         s->type = COMEDI_SUBD_DO;
  90         s->subdev_flags = SDF_WRITABLE;
  91         s->maxdata = 1;
  92         s->n_chan = 16;
  93         s->insn_bits = pcl730_do_insn;
  94         s->range_table = &range_digital;
  95         s->private = (void *)PCL730_IDIO_LO;
  96
  97         s = dev->subdevices + 1;
  98         /* Isolated di */
  99         s->type = COMEDI_SUBD_DI;
 100         s->subdev_flags = SDF_READABLE;
 101         s->maxdata = 1;
 102         s->n_chan = 16;
 103         s->insn_bits = pcl730_di_insn;
 104         s->range_table = &range_digital;
 105         s->private = (void *)PCL730_IDIO_LO;
 106
 107         s = dev->subdevices + 2;
 108         /* TTL do */
 109         s->type = COMEDI_SUBD_DO;
 110         s->subdev_flags = SDF_WRITABLE;
 111         s->maxdata = 1;
 112         s->n_chan = 16;
 113         s->insn_bits = pcl730_do_insn;
 114         s->range_table = &range_digital;
 115         s->private = (void *)PCL730_DIO_LO;
 116
 117         s = dev->subdevices + 3;
 118         /* TTL di */
 119         s->type = COMEDI_SUBD_DI;
 120         s->subdev_flags = SDF_READABLE;
 121         s->maxdata = 1;
 122         s->n_chan = 16;
 123         s->insn_bits = pcl730_di_insn;
 124         s->range_table = &range_digital;
 125         s->private = (void *)PCL730_DIO_LO;
 126
 127         printk(KERN_INFO "\n");
 128
 129         return 0;
 130 }
 131
 132 static void pcl730_detach(struct comedi_device *dev)
 133 {
 134         const struct pcl730_board *board = comedi_board(dev);
 135
 136         if (dev->iobase)
 137                 release_region(dev->iobase, board->io_range);
 138 }
 139
 140 static const struct pcl730_board boardtypes[] = {
 141         { "pcl730", PCL730_SIZE, },
 142         { "iso730", PCL730_SIZE, },
 143         { "acl7130", ACL7130_SIZE, },
 144 };
 145
 146 static struct comedi_driver pcl730_driver = {
 147         .driver_name    = "pcl730",
 148         .module         = THIS_MODULE,
 149         .attach         = pcl730_attach,
 150         .detach         = pcl730_detach,
 151         .board_name     = &boardtypes[0].name,
 152         .num_names      = ARRAY_SIZE(boardtypes),
 153         .offset         = sizeof(struct pcl730_board),
 154 };
 155 module_comedi_driver(pcl730_driver);
 156
 157 MODULE_AUTHOR("Comedi http://www.comedi.org");
 158 MODULE_DESCRIPTION("Comedi low-level driver");
 159 MODULE_LICENSE("GPL");