drivers/staging/comedi/drivers/acl7225b.c

   1 /*
   2  * comedi/drivers/acl7225b.c
   3  * Driver for Adlink NuDAQ ACL-7225b and clones
   4  * José Luis Sánchez
   5  */
   6 /*
   7 Driver: acl7225b
   8 Description: Adlink NuDAQ ACL-7225b & compatibles
   9 Author: José Luis Sánchez (jsanchezv@teleline.es)
  10 Status: testing
  11 Devices: [Adlink] ACL-7225b (acl7225b), [ICP] P16R16DIO (p16r16dio)
  12 */
  13
  14 #include "../comedidev.h"
  15
  16 #include <linux/ioport.h>
  17
  18 #define ACL7225_RIO_LO 0        /* Relays input/output low byte (R0-R7) */
  19 #define ACL7225_RIO_HI 1        /* Relays input/output high byte (R8-R15) */
  20 #define ACL7225_DI_LO  2        /* Digital input low byte (DI0-DI7) */
  21 #define ACL7225_DI_HI  3        /* Digital input high byte (DI8-DI15) */
  22
  23 struct acl7225b_boardinfo {
  24         const char *name;
  25         int io_range;
  26 };
  27
  28 static const struct acl7225b_boardinfo acl7225b_boards[] = {
  29         {
  30                 .name           = "acl7225b",
  31                 .io_range       = 8,            /* only 4 are used */
  32         }, {
  33                 .name           = "p16r16dio",
  34                 .io_range       = 4,
  35         },
  36 };
  37
  38 static int acl7225b_do_insn_bits(struct comedi_device *dev,
  39                                  struct comedi_subdevice *s,
  40                                  struct comedi_insn *insn,
  41                                  unsigned int *data)
  42 {
  43         unsigned long reg = (unsigned long)s->private;
  44         unsigned int mask = data[0];
  45         unsigned int bits = data[1];
  46
  47         if (mask) {
  48                 s->state &= ~mask;
  49                 s->state |= (bits & mask);
  50
  51                 if (mask & 0x00ff)
  52                         outb(s->state & 0xff, dev->iobase + reg);
  53                 if (mask & 0xff00)
  54                         outb((s->state >> 8), dev->iobase + reg + 1);
  55         }
  56
  57         data[1] = s->state;
  58
  59         return insn->n;
  60 }
  61
  62 static int acl7225b_di_insn_bits(struct comedi_device *dev,
  63                                  struct comedi_subdevice *s,
  64                                  struct comedi_insn *insn,
  65                                  unsigned int *data)
  66 {
  67         unsigned long reg = (unsigned long)s->private;
  68
  69         data[1] = inb(dev->iobase + reg) |
  70                   (inb(dev->iobase + reg + 1) << 8);
  71
  72         return insn->n;
  73 }
  74
  75 static int acl7225b_attach(struct comedi_device *dev,
  76                            struct comedi_devconfig *it)
  77 {
  78         const struct acl7225b_boardinfo *board = comedi_board(dev);
  79         struct comedi_subdevice *s;
  80         int ret;
  81
  82         ret = comedi_request_region(dev, it->options[0], board->io_range);
  83         if (ret)
  84                 return ret;
  85
  86         ret = comedi_alloc_subdevices(dev, 3);
  87         if (ret)
  88                 return ret;
  89
  90         s = &dev->subdevices[0];
  91         /* Relays outputs */
  92         s->type         = COMEDI_SUBD_DO;
  93         s->subdev_flags = SDF_WRITABLE;
  94         s->maxdata      = 1;
  95         s->n_chan       = 16;
  96         s->insn_bits    = acl7225b_do_insn_bits;
  97         s->range_table  = &range_digital;
  98         s->private      = (void *)ACL7225_RIO_LO;
  99
 100         s = &dev->subdevices[1];
 101         /* Relays status */
 102         s->type         = COMEDI_SUBD_DI;
 103         s->subdev_flags = SDF_READABLE;
 104         s->maxdata      = 1;
 105         s->n_chan       = 16;
 106         s->insn_bits    = acl7225b_di_insn_bits;
 107         s->range_table  = &range_digital;
 108         s->private      = (void *)ACL7225_RIO_LO;
 109
 110         s = &dev->subdevices[2];
 111         /* Isolated digital inputs */
 112         s->type         = COMEDI_SUBD_DI;
 113         s->subdev_flags = SDF_READABLE;
 114         s->maxdata      = 1;
 115         s->n_chan       = 16;
 116         s->insn_bits    = acl7225b_di_insn_bits;
 117         s->range_table  = &range_digital;
 118         s->private      = (void *)ACL7225_DI_LO;
 119
 120         return 0;
 121 }
 122
 123 static struct comedi_driver acl7225b_driver = {
 124         .driver_name    = "acl7225b",
 125         .module         = THIS_MODULE,
 126         .attach         = acl7225b_attach,
 127         .detach         = comedi_legacy_detach,
 128         .board_name     = &acl7225b_boards[0].name,
 129         .num_names      = ARRAY_SIZE(acl7225b_boards),
 130         .offset         = sizeof(struct acl7225b_boardinfo),
 131 };
 132 module_comedi_driver(acl7225b_driver);
 133
 134 MODULE_DESCRIPTION("Comedi: NuDAQ ACL-7225B, 16 Relay & 16 Isolated DI Card");
 135 MODULE_AUTHOR("Comedi http://www.comedi.org");
 136 MODULE_LICENSE("GPL");