drivers/staging/comedi/drivers/pcl724.c

   1 /*
   2     comedi/drivers/pcl724.c
   3
   4     Michal Dobes <dobes@tesnet.cz>
   5
   6     hardware driver for Advantech cards:
   7      card:   PCL-724, PCL-722, PCL-731
   8      driver: pcl724,  pcl722,  pcl731
   9     and ADLink cards:
  10      card:   ACL-7122, ACL-7124, PET-48DIO
  11      driver: acl7122,  acl7124,  pet48dio
  12
  13     Options for PCL-724, PCL-731, ACL-7124 and PET-48DIO:
  14      [0] - IO Base
  15
  16     Options for PCL-722 and ACL-7122:
  17      [0] - IO Base
  18      [1] - IRQ (0=disable IRQ) IRQ isn't supported at this time!
  19      [2] -number of DIO:
  20               0, 144: 144 DIO configuration
  21               1,  96:  96 DIO configuration
  22 */
  23 /*
  24 Driver: pcl724
  25 Description: Advantech PCL-724, PCL-722, PCL-731 ADLink ACL-7122, ACL-7124,
  26   PET-48DIO
  27 Author: Michal Dobes <dobes@tesnet.cz>
  28 Devices: [Advantech] PCL-724 (pcl724), PCL-722 (pcl722), PCL-731 (pcl731),
  29   [ADLink] ACL-7122 (acl7122), ACL-7124 (acl7124), PET-48DIO (pet48dio)
  30 Status: untested
  31
  32 This is driver for digital I/O boards PCL-722/724/731 with 144/24/48 DIO
  33 and for digital I/O boards ACL-7122/7124/PET-48DIO with 144/24/48 DIO.
  34 It need 8255.o for operations and only immediate mode is supported.
  35 See the source for configuration details.
  36 */
  37 /*
  38  * check_driver overrides:
  39  *   struct comedi_insn
  40  */
  41
  42 #include "../comedidev.h"
  43
  44 #include <linux/ioport.h>
  45 #include <linux/delay.h>
  46
  47 #include "8255.h"
  48
  49 #define PCL722_SIZE    32
  50 #define PCL722_96_SIZE 16
  51 #define PCL724_SIZE     4
  52 #define PCL731_SIZE     8
  53 #define PET48_SIZE      2
  54
  55 #define SIZE_8255       4
  56
  57 /* #define PCL724_IRQ   1  no IRQ support now */
  58
  59 struct pcl724_board {
  60
  61         const char *name;       /*  board name */
  62         int dio;                /*  num of DIO */
  63         int numofports;         /*  num of 8255 subdevices */
  64         unsigned int IRQbits;   /*  allowed interrupts */
  65         unsigned int io_range;  /*  len of IO space */
  66         char can_have96;
  67         char is_pet48;
  68 };
  69
  70 static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
  71 {
  72         unsigned long iobase = arg;
  73
  74         if (dir) {
  75                 outb(data, iobase + port);
  76                 return 0;
  77         } else {
  78                 return inb(iobase + port);
  79         }
  80 }
  81
  82 static int subdev_8255mapped_cb(int dir, int port, int data,
  83                                 unsigned long iobase)
  84 {
  85         int movport = SIZE_8255 * (iobase >> 12);
  86
  87         iobase &= 0x0fff;
  88
  89         if (dir) {
  90                 outb(port + movport, iobase);
  91                 outb(data, iobase + 1);
  92                 return 0;
  93         } else {
  94                 outb(port + movport, iobase);
  95                 return inb(iobase + 1);
  96         }
  97 }
  98
  99 static int pcl724_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 100 {
 101         const struct pcl724_board *board = comedi_board(dev);
 102         unsigned long iobase;
 103         unsigned int iorange;
 104         int ret, i, n_subdevices;
 105 #ifdef PCL724_IRQ
 106         unsigned int irq;
 107 #endif
 108
 109         iobase = it->options[0];
 110         iorange = board->io_range;
 111         if ((board->can_have96) && ((it->options[1] == 1)
 112                                          || (it->options[1] == 96)))
 113                 iorange = PCL722_96_SIZE; /* PCL-724 in 96 DIO configuration */
 114         printk(KERN_INFO "comedi%d: pcl724: board=%s, 0x%03lx ", dev->minor,
 115                board->name, iobase);
 116         if (!request_region(iobase, iorange, "pcl724")) {
 117                 printk("I/O port conflict\n");
 118                 return -EIO;
 119         }
 120
 121         dev->iobase = iobase;
 122
 123         dev->board_name = board->name;
 124
 125 #ifdef PCL724_IRQ
 126         irq = 0;
 127         if (board->IRQbits != 0) {      /* board support IRQ */
 128                 irq = it->options[1];
 129                 if (irq) {      /* we want to use IRQ */
 130                         if (((1 << irq) & board->IRQbits) == 0) {
 131                                 printk(KERN_WARNING
 132                                        ", IRQ %u is out of allowed range, "
 133                                        "DISABLING IT", irq);
 134                                 irq = 0;        /* Bad IRQ */
 135                         } else {
 136                                 if (request_irq
 137                                     (irq, interrupt_pcl724, 0, "pcl724", dev)) {
 138                                         printk(KERN_WARNING
 139                                                ", unable to allocate IRQ %u, "
 140                                                "DISABLING IT", irq);
 141                                         irq = 0;        /* Can't use IRQ */
 142                                 } else {
 143                                         printk(", irq=%u", irq);
 144                                 }
 145                         }
 146                 }
 147         }
 148
 149         dev->irq = irq;
 150 #endif
 151
 152         printk("\n");
 153
 154         n_subdevices = board->numofports;
 155         if ((board->can_have96) && ((it->options[1] == 1)
 156                                          || (it->options[1] == 96)))
 157                 n_subdevices = 4;       /*  PCL-724 in 96 DIO configuration */
 158
 159         ret = comedi_alloc_subdevices(dev, n_subdevices);
 160         if (ret)
 161                 return ret;
 162
 163         for (i = 0; i < dev->n_subdevices; i++) {
 164                 if (board->is_pet48) {
 165                         subdev_8255_init(dev, dev->subdevices + i,
 166                                          subdev_8255mapped_cb,
 167                                          (unsigned long)(dev->iobase +
 168                                                          i * 0x1000));
 169                 } else
 170                         subdev_8255_init(dev, dev->subdevices + i,
 171                                          subdev_8255_cb,
 172                                          (unsigned long)(dev->iobase +
 173                                                          SIZE_8255 * i));
 174         }
 175
 176         return 0;
 177 }
 178
 179 static void pcl724_detach(struct comedi_device *dev)
 180 {
 181         const struct pcl724_board *board = comedi_board(dev);
 182         int i;
 183
 184         for (i = 0; i < dev->n_subdevices; i++)
 185                 subdev_8255_cleanup(dev, dev->subdevices + i);
 186 #ifdef PCL724_IRQ
 187         if (dev->irq)
 188                 free_irq(dev->irq, dev);
 189 #endif
 190         release_region(dev->iobase, board->io_range);
 191 }
 192
 193 static const struct pcl724_board boardtypes[] = {
 194         { "pcl724", 24, 1, 0x00fc, PCL724_SIZE, 0, 0, },
 195         { "pcl722", 144, 6, 0x00fc, PCL722_SIZE, 1, 0, },
 196         { "pcl731", 48, 2, 0x9cfc, PCL731_SIZE, 0, 0, },
 197         { "acl7122", 144, 6, 0x9ee8, PCL722_SIZE, 1, 0, },
 198         { "acl7124", 24, 1, 0x00fc, PCL724_SIZE, 0, 0, },
 199         { "pet48dio", 48, 2, 0x9eb8, PET48_SIZE, 0, 1, },
 200 };
 201
 202 static struct comedi_driver pcl724_driver = {
 203         .driver_name    = "pcl724",
 204         .module         = THIS_MODULE,
 205         .attach         = pcl724_attach,
 206         .detach         = pcl724_detach,
 207         .board_name     = &boardtypes[0].name,
 208         .num_names      = ARRAY_SIZE(boardtypes),
 209         .offset         = sizeof(struct pcl724_board),
 210 };
 211 module_comedi_driver(pcl724_driver);
 212
 213 MODULE_AUTHOR("Comedi http://www.comedi.org");
 214 MODULE_DESCRIPTION("Comedi low-level driver");
 215 MODULE_LICENSE("GPL");