drivers/staging/comedi/drivers/pcl724.c

   1 /*
   2  * pcl724.c
   3  * Comedi driver for 8255 based ISA and PC/104 DIO boards
   4  *
   5  * Michal Dobes <dobes@tesnet.cz>
   6  */
   7
   8 /*
   9  * Driver: pcl724
  10  * Description: Comedi driver for 8255 based ISA DIO boards
  11  * Devices: (Advantech) PCL-724 [pcl724]
  12  *          (Advantech) PCL-722 [pcl722]
  13  *          (Advantech) PCL-731 [pcl731]
  14  *          (ADLink) ACL-7122 [acl7122]
  15  *          (ADLink) ACL-7124 [acl7124]
  16  *          (ADLink) PET-48DIO [pet48dio]
  17  *          (WinSystems) PCM-IO48 [pcmio48]
  18  *          (Diamond Systems) ONYX-MM-DIO [onyx-mm-dio]
  19  * Author: Michal Dobes <dobes@tesnet.cz>
  20  * Status: untested
  21  *
  22  * Configuration options:
  23  *   [0] - IO Base
  24  *   [1] - IRQ (not supported)
  25  *   [2] - number of DIO (pcl722 and acl7122 boards)
  26  *         0, 144: 144 DIO configuration
  27  *         1,  96:  96 DIO configuration
  28  */
  29
  30 #include <linux/module.h>
  31 #include "../comedidev.h"
  32
  33 #include "8255.h"
  34
  35 struct pcl724_board {
  36         const char *name;
  37         unsigned int io_range;
  38         unsigned int can_have96:1;
  39         unsigned int is_pet48:1;
  40         int numofports;
  41 };
  42
  43 static const struct pcl724_board boardtypes[] = {
  44         {
  45                 .name           = "pcl724",
  46                 .io_range       = 0x04,
  47                 .numofports     = 1,    /* 24 DIO channels */
  48         }, {
  49                 .name           = "pcl722",
  50                 .io_range       = 0x20,
  51                 .can_have96     = 1,
  52                 .numofports     = 6,    /* 144 (or 96) DIO channels */
  53         }, {
  54                 .name           = "pcl731",
  55                 .io_range       = 0x08,
  56                 .numofports     = 2,    /* 48 DIO channels */
  57         }, {
  58                 .name           = "acl7122",
  59                 .io_range       = 0x20,
  60                 .can_have96     = 1,
  61                 .numofports     = 6,    /* 144 (or 96) DIO channels */
  62         }, {
  63                 .name           = "acl7124",
  64                 .io_range       = 0x04,
  65                 .numofports     = 1,    /* 24 DIO channels */
  66         }, {
  67                 .name           = "pet48dio",
  68                 .io_range       = 0x02,
  69                 .is_pet48       = 1,
  70                 .numofports     = 2,    /* 48 DIO channels */
  71         }, {
  72                 .name           = "pcmio48",
  73                 .io_range       = 0x08,
  74                 .numofports     = 2,    /* 48 DIO channels */
  75         }, {
  76                 .name           = "onyx-mm-dio",
  77                 .io_range       = 0x10,
  78                 .numofports     = 2,    /* 48 DIO channels */
  79         },
  80 };
  81
  82 static int pcl724_8255mapped_io(struct comedi_device *dev,
  83                                 int dir, int port, int data,
  84                                 unsigned long iobase)
  85 {
  86         int movport = I8255_SIZE * (iobase >> 12);
  87
  88         iobase &= 0x0fff;
  89
  90         outb(port + movport, iobase);
  91         if (dir) {
  92                 outb(data, iobase + 1);
  93                 return 0;
  94         }
  95         return inb(iobase + 1);
  96 }
  97
  98 static int pcl724_attach(struct comedi_device *dev,
  99                          struct comedi_devconfig *it)
 100 {
 101         const struct pcl724_board *board = dev->board_ptr;
 102         struct comedi_subdevice *s;
 103         unsigned long iobase;
 104         unsigned int iorange;
 105         int n_subdevices;
 106         int ret;
 107         int i;
 108
 109         iorange = board->io_range;
 110         n_subdevices = board->numofports;
 111
 112         /* Handle PCL-724 in 96 DIO configuration */
 113         if (board->can_have96 &&
 114             (it->options[2] == 1 || it->options[2] == 96)) {
 115                 iorange = 0x10;
 116                 n_subdevices = 4;
 117         }
 118
 119         ret = comedi_request_region(dev, it->options[0], iorange);
 120         if (ret)
 121                 return ret;
 122
 123         ret = comedi_alloc_subdevices(dev, n_subdevices);
 124         if (ret)
 125                 return ret;
 126
 127         for (i = 0; i < dev->n_subdevices; i++) {
 128                 s = &dev->subdevices[i];
 129                 if (board->is_pet48) {
 130                         iobase = dev->iobase + (i * 0x1000);
 131                         ret = subdev_8255_init(dev, s, pcl724_8255mapped_io,
 132                                                iobase);
 133                 } else {
 134                         ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
 135                 }
 136                 if (ret)
 137                         return ret;
 138         }
 139
 140         return 0;
 141 }
 142
 143 static struct comedi_driver pcl724_driver = {
 144         .driver_name    = "pcl724",
 145         .module         = THIS_MODULE,
 146         .attach         = pcl724_attach,
 147         .detach         = comedi_legacy_detach,
 148         .board_name     = &boardtypes[0].name,
 149         .num_names      = ARRAY_SIZE(boardtypes),
 150         .offset         = sizeof(struct pcl724_board),
 151 };
 152 module_comedi_driver(pcl724_driver);
 153
 154 MODULE_AUTHOR("Comedi http://www.comedi.org");
 155 MODULE_DESCRIPTION("Comedi driver for 8255 based ISA and PC/104 DIO boards");
 156 MODULE_LICENSE("GPL");