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,
  26                            struct comedi_devconfig *it);
  27 static int acl7225b_detach(struct comedi_device *dev);
  28
  29 struct boardtype {
  30         const char *name;       /*  driver name */
  31         int io_range;           /*  len of I/O space */
  32 };
  33
  34 static const struct boardtype boardtypes[] = {
  35         {"acl7225b", ACL7225_SIZE,},
  36         {"p16r16dio", P16R16DIO_SIZE,},
  37 };
  38
  39 #define n_boardtypes (sizeof(boardtypes)/sizeof(struct boardtype))
  40 #define this_board ((const struct boardtype *)dev->board_ptr)
  41
  42 static struct comedi_driver driver_acl7225b = {
  43         .driver_name = "acl7225b",
  44         .module = THIS_MODULE,
  45         .attach = acl7225b_attach,
  46         .detach = acl7225b_detach,
  47         .board_name = &boardtypes[0].name,
  48         .num_names = n_boardtypes,
  49         .offset = sizeof(struct boardtype),
  50 };
  51
  52 COMEDI_INITCLEANUP(driver_acl7225b);
  53
  54 static int acl7225b_do_insn(struct comedi_device *dev,
  55                             struct comedi_subdevice *s,
  56                             struct comedi_insn *insn, unsigned int *data)
  57 {
  58         if (insn->n != 2)
  59                 return -EINVAL;
  60
  61         if (data[0]) {
  62                 s->state &= ~data[0];
  63                 s->state |= (data[0] & data[1]);
  64         }
  65         if (data[0] & 0x00ff)
  66                 outb(s->state & 0xff, dev->iobase + (unsigned long)s->private);
  67         if (data[0] & 0xff00)
  68                 outb((s->state >> 8),
  69                      dev->iobase + (unsigned long)s->private + 1);
  70
  71         data[1] = s->state;
  72
  73         return 2;
  74 }
  75
  76 static int acl7225b_di_insn(struct comedi_device *dev,
  77                             struct comedi_subdevice *s,
  78                             struct comedi_insn *insn, unsigned int *data)
  79 {
  80         if (insn->n != 2)
  81                 return -EINVAL;
  82
  83         data[1] = inb(dev->iobase + (unsigned long)s->private) |
  84             (inb(dev->iobase + (unsigned long)s->private + 1) << 8);
  85
  86         return 2;
  87 }
  88
  89 static int acl7225b_attach(struct comedi_device *dev,
  90                            struct comedi_devconfig *it)
  91 {
  92         struct comedi_subdevice *s;
  93         int iobase, iorange;
  94
  95         iobase = it->options[0];
  96         iorange = this_board->io_range;
  97         printk(KERN_INFO "comedi%d: acl7225b: board=%s 0x%04x\n", dev->minor,
  98                this_board->name, iobase);
  99         if (!request_region(iobase, iorange, "acl7225b")) {
 100                 printk(KERN_ERR "comedi%d: request_region failed - I/O port conflict\n",
 101                         dev->minor);
 102                 return -EIO;
 103         }
 104         dev->board_name = this_board->name;
 105         dev->iobase = iobase;
 106         dev->irq = 0;
 107
 108         if (alloc_subdevices(dev, 3) < 0)
 109                 return -ENOMEM;
 110
 111         s = dev->subdevices + 0;
 112         /* Relays outputs */
 113         s->type = COMEDI_SUBD_DO;
 114         s->subdev_flags = SDF_WRITABLE;
 115         s->maxdata = 1;
 116         s->n_chan = 16;
 117         s->insn_bits = acl7225b_do_insn;
 118         s->range_table = &range_digital;
 119         s->private = (void *)ACL7225_RIO_LO;
 120
 121         s = dev->subdevices + 1;
 122         /* Relays status */
 123         s->type = COMEDI_SUBD_DI;
 124         s->subdev_flags = SDF_READABLE;
 125         s->maxdata = 1;
 126         s->n_chan = 16;
 127         s->insn_bits = acl7225b_di_insn;
 128         s->range_table = &range_digital;
 129         s->private = (void *)ACL7225_RIO_LO;
 130
 131         s = dev->subdevices + 2;
 132         /* Isolated digital inputs */
 133         s->type = COMEDI_SUBD_DI;
 134         s->subdev_flags = SDF_READABLE;
 135         s->maxdata = 1;
 136         s->n_chan = 16;
 137         s->insn_bits = acl7225b_di_insn;
 138         s->range_table = &range_digital;
 139         s->private = (void *)ACL7225_DI_LO;
 140
 141         return 0;
 142 }
 143
 144 static int acl7225b_detach(struct comedi_device *dev)
 145 {
 146         printk(KERN_INFO "comedi%d: acl7225b: remove\n", dev->minor);
 147
 148         if (dev->iobase)
 149                 release_region(dev->iobase, this_board->io_range);
 150
 151         return 0;
 152 }