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_SIZE   8        /* Requires 8 ioports, but only 4 are used */
  19 #define P16R16DIO_SIZE 4
  20 #define ACL7225_RIO_LO 0        /* Relays input/output low byte (R0-R7) */
  21 #define ACL7225_RIO_HI 1        /* Relays input/output high byte (R8-R15) */
  22 #define ACL7225_DI_LO  2        /* Digital input low byte (DI0-DI7) */
  23 #define ACL7225_DI_HI  3        /* Digital input high byte (DI8-DI15) */
  24
  25 static int acl7225b_attach(struct comedi_device *dev, struct comedi_devconfig * it);
  26 static int acl7225b_detach(struct comedi_device *dev);
  27
  28 struct boardtype {
  29         const char *name;       /*  driver name */
  30         int io_range;           /*  len of I/O space */
  31 };
  32
  33 static const struct boardtype boardtypes[] = {
  34         {"acl7225b", ACL7225_SIZE,},
  35         {"p16r16dio", P16R16DIO_SIZE,},
  36 };
  37
  38 #define n_boardtypes (sizeof(boardtypes)/sizeof(struct boardtype))
  39 #define this_board ((const struct boardtype *)dev->board_ptr)
  40
  41 static struct comedi_driver driver_acl7225b = {
  42       driver_name:"acl7225b",
  43       module:THIS_MODULE,
  44       attach:acl7225b_attach,
  45       detach:acl7225b_detach,
  46       board_name:&boardtypes[0].name,
  47       num_names:n_boardtypes,
  48       offset:sizeof(struct boardtype),
  49 };
  50
  51 COMEDI_INITCLEANUP(driver_acl7225b);
  52
  53 static int acl7225b_do_insn(struct comedi_device *dev, struct comedi_subdevice * s,
  54         struct comedi_insn *insn, unsigned int *data)
  55 {
  56         if (insn->n != 2)
  57                 return -EINVAL;
  58
  59         if (data[0]) {
  60                 s->state &= ~data[0];
  61                 s->state |= (data[0] & data[1]);
  62         }
  63         if (data[0] & 0x00ff)
  64                 outb(s->state & 0xff, dev->iobase + (unsigned long)s->private);
  65         if (data[0] & 0xff00)
  66                 outb((s->state >> 8),
  67                         dev->iobase + (unsigned long)s->private + 1);
  68
  69         data[1] = s->state;
  70
  71         return 2;
  72 }
  73
  74 static int acl7225b_di_insn(struct comedi_device *dev, struct comedi_subdevice * s,
  75         struct comedi_insn *insn, unsigned int *data)
  76 {
  77         if (insn->n != 2)
  78                 return -EINVAL;
  79
  80         data[1] = inb(dev->iobase + (unsigned long)s->private) |
  81                 (inb(dev->iobase + (unsigned long)s->private + 1) << 8);
  82
  83         return 2;
  84 }
  85
  86 static int acl7225b_attach(struct comedi_device *dev, struct comedi_devconfig * it)
  87 {
  88         struct comedi_subdevice *s;
  89         int iobase, iorange;
  90
  91         iobase = it->options[0];
  92         iorange = this_board->io_range;
  93         printk("comedi%d: acl7225b: board=%s 0x%04x ", dev->minor,
  94                 this_board->name, iobase);
  95         if (!request_region(iobase, iorange, "acl7225b")) {
  96                 printk("I/O port conflict\n");
  97                 return -EIO;
  98         }
  99         dev->board_name = this_board->name;
 100         dev->iobase = iobase;
 101         dev->irq = 0;
 102
 103         if (alloc_subdevices(dev, 3) < 0)
 104                 return -ENOMEM;
 105
 106         s = dev->subdevices + 0;
 107         /* Relays outputs */
 108         s->type = COMEDI_SUBD_DO;
 109         s->subdev_flags = SDF_WRITABLE;
 110         s->maxdata = 1;
 111         s->n_chan = 16;
 112         s->insn_bits = acl7225b_do_insn;
 113         s->range_table = &range_digital;
 114         s->private = (void *)ACL7225_RIO_LO;
 115
 116         s = dev->subdevices + 1;
 117         /* Relays status */
 118         s->type = COMEDI_SUBD_DI;
 119         s->subdev_flags = SDF_READABLE;
 120         s->maxdata = 1;
 121         s->n_chan = 16;
 122         s->insn_bits = acl7225b_di_insn;
 123         s->range_table = &range_digital;
 124         s->private = (void *)ACL7225_RIO_LO;
 125
 126         s = dev->subdevices + 2;
 127         /* Isolated digital inputs */
 128         s->type = COMEDI_SUBD_DI;
 129         s->subdev_flags = SDF_READABLE;
 130         s->maxdata = 1;
 131         s->n_chan = 16;
 132         s->insn_bits = acl7225b_di_insn;
 133         s->range_table = &range_digital;
 134         s->private = (void *)ACL7225_DI_LO;
 135
 136         printk("\n");
 137
 138         return 0;
 139 }
 140
 141 static int acl7225b_detach(struct comedi_device *dev)
 142 {
 143         printk("comedi%d: acl7225b: remove\n", dev->minor);
 144
 145         if (dev->iobase)
 146                 release_region(dev->iobase, this_board->io_range);
 147
 148         return 0;
 149 }