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  *   comedi_insn
  40  */
  41
  42 #include <linux/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 static int pcl724_attach(comedi_device * dev, comedi_devconfig * it);
  60 static int pcl724_detach(comedi_device * dev);
  61
  62 typedef struct {
  63         const char *name;       // board name
  64         int dio;                // num of DIO
  65         int numofports;         // num of 8255 subdevices
  66         unsigned int IRQbits;   // allowed interrupts
  67         unsigned int io_range;  // len of IO space
  68         char can_have96;
  69         char is_pet48;
  70 } boardtype;
  71
  72 static const boardtype boardtypes[] = {
  73         {"pcl724", 24, 1, 0x00fc, PCL724_SIZE, 0, 0,},
  74         {"pcl722", 144, 6, 0x00fc, PCL722_SIZE, 1, 0,},
  75         {"pcl731", 48, 2, 0x9cfc, PCL731_SIZE, 0, 0,},
  76         {"acl7122", 144, 6, 0x9ee8, PCL722_SIZE, 1, 0,},
  77         {"acl7124", 24, 1, 0x00fc, PCL724_SIZE, 0, 0,},
  78         {"pet48dio", 48, 2, 0x9eb8, PET48_SIZE, 0, 1,},
  79 };
  80
  81 #define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
  82 #define this_board ((const boardtype *)dev->board_ptr)
  83
  84 static comedi_driver driver_pcl724 = {
  85       driver_name:"pcl724",
  86       module:THIS_MODULE,
  87       attach:pcl724_attach,
  88       detach:pcl724_detach,
  89       board_name:&boardtypes[0].name,
  90       num_names:n_boardtypes,
  91       offset:sizeof(boardtype),
  92 };
  93
  94 COMEDI_INITCLEANUP(driver_pcl724);
  95
  96 static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
  97 {
  98         unsigned long iobase = arg;
  99
 100         if (dir) {
 101                 outb(data, iobase + port);
 102                 return 0;
 103         } else {
 104                 return inb(iobase + port);
 105         }
 106 }
 107
 108 static int subdev_8255mapped_cb(int dir, int port, int data,
 109         unsigned long iobase)
 110 {
 111         int movport = SIZE_8255 * (iobase >> 12);
 112
 113         iobase &= 0x0fff;
 114
 115         if (dir) {
 116                 outb(port + movport, iobase);
 117                 outb(data, iobase + 1);
 118                 return 0;
 119         } else {
 120                 outb(port + movport, iobase);
 121                 return inb(iobase + 1);
 122         }
 123 }
 124
 125 static int pcl724_attach(comedi_device * dev, comedi_devconfig * it)
 126 {
 127         unsigned long iobase;
 128         unsigned int iorange;
 129         int ret, i, n_subdevices;
 130 #ifdef PCL724_IRQ
 131         unsigned int irq;
 132 #endif
 133
 134         iobase = it->options[0];
 135         iorange = this_board->io_range;
 136         if ((this_board->can_have96) && ((it->options[1] == 1)
 137                         || (it->options[1] == 96)))
 138                 iorange = PCL722_96_SIZE;       // PCL-724 in 96 DIO configuration
 139         printk("comedi%d: pcl724: board=%s, 0x%03lx ", dev->minor,
 140                 this_board->name, iobase);
 141         if (!request_region(iobase, iorange, "pcl724")) {
 142                 printk("I/O port conflict\n");
 143                 return -EIO;
 144         }
 145
 146         dev->iobase = iobase;
 147
 148         dev->board_name = this_board->name;
 149
 150 #ifdef PCL724_IRQ
 151         irq = 0;
 152         if (this_board->IRQbits != 0) { /* board support IRQ */
 153                 irq = it->options[1];
 154                 if (irq) {      /* we want to use IRQ */
 155                         if (((1 << irq) & this_board->IRQbits) == 0) {
 156                                 rt_printk
 157                                         (", IRQ %u is out of allowed range, DISABLING IT",
 158                                         irq);
 159                                 irq = 0;        /* Bad IRQ */
 160                         } else {
 161                                 if (comedi_request_irq(irq, interrupt_pcl724, 0,
 162                                                 "pcl724", dev)) {
 163                                         rt_printk
 164                                                 (", unable to allocate IRQ %u, DISABLING IT",
 165                                                 irq);
 166                                         irq = 0;        /* Can't use IRQ */
 167                                 } else {
 168                                         rt_printk(", irq=%u", irq);
 169                                 }
 170                         }
 171                 }
 172         }
 173
 174         dev->irq = irq;
 175 #endif
 176
 177         printk("\n");
 178
 179         n_subdevices = this_board->numofports;
 180         if ((this_board->can_have96) && ((it->options[1] == 1)
 181                         || (it->options[1] == 96)))
 182                 n_subdevices = 4;       // PCL-724 in 96 DIO configuration
 183
 184         if ((ret = alloc_subdevices(dev, n_subdevices)) < 0)
 185                 return ret;
 186
 187         for (i = 0; i < dev->n_subdevices; i++) {
 188                 if (this_board->is_pet48) {
 189                         subdev_8255_init(dev, dev->subdevices + i,
 190                                 subdev_8255mapped_cb,
 191                                 (unsigned long)(dev->iobase + i * 0x1000));
 192                 } else
 193                         subdev_8255_init(dev, dev->subdevices + i,
 194                                 subdev_8255_cb,
 195                                 (unsigned long)(dev->iobase + SIZE_8255 * i));
 196         };
 197
 198         return 0;
 199 }
 200
 201 static int pcl724_detach(comedi_device * dev)
 202 {
 203         int i;
 204
 205 //      printk("comedi%d: pcl724: remove\n",dev->minor);
 206
 207         for (i = 0; i < dev->n_subdevices; i++) {
 208                 subdev_8255_cleanup(dev, dev->subdevices + i);
 209         }
 210
 211 #ifdef PCL724_IRQ
 212         if (dev->irq) {
 213                 comedi_free_irq(dev->irq, dev);
 214         }
 215 #endif
 216
 217         release_region(dev->iobase, this_board->io_range);
 218
 219         return 0;
 220 }