comedi/drivers/pcl724.c

   1 /*
   2     module/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.o
  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 {
  74         {"pcl724",    24, 1, 0x00fc, PCL724_SIZE, 0, 0, },
  75         {"pcl722",   144, 6, 0x00fc, PCL722_SIZE, 1, 0, },
  76         {"pcl731",    48, 2, 0x9cfc, PCL731_SIZE, 0, 0, },
  77         {"acl7122",  144, 6, 0x9ee8, PCL722_SIZE, 1, 0, },
  78         {"acl7124",   24, 1, 0x00fc, PCL724_SIZE, 0, 0, },
  79         {"pet48dio",  48, 2, 0x9eb8, PET48_SIZE,  0, 1, },
  80 };
  81
  82 #define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
  83 #define this_board ((const boardtype *)dev->board_ptr)
  84
  85 static comedi_driver driver_pcl724={
  86         driver_name:    "pcl724",
  87         module:         THIS_MODULE,
  88         attach:         pcl724_attach,
  89         detach:         pcl724_detach,
  90         board_name:     &boardtypes[0].name,
  91         num_names:      n_boardtypes,
  92         offset:         sizeof(boardtype),
  93 };
  94 COMEDI_INITCLEANUP(driver_pcl724);
  95
  96
  97 static int subdev_8255_cb(int dir,int port,int data,unsigned long arg)
  98 {
  99         unsigned long iobase=arg;
 100
 101         if(dir){
 102                 outb(data,iobase+port);
 103                 return 0;
 104         }else{
 105                 return inb(iobase+port);
 106         }
 107 }
 108
 109 static int subdev_8255mapped_cb(int dir,int port,int data,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)||(it->options[1]==96)))
 137                 iorange=PCL722_96_SIZE; // PCL-724 in 96 DIO configuration
 138         printk("comedi%d: pcl724: board=%s, 0x%03lx ",dev->minor,
 139                 this_board->name,iobase);
 140         if(!request_region(iobase, iorange, "pcl724")){
 141                 printk("I/O port conflict\n");
 142                 return -EIO;
 143         }
 144
 145         dev->iobase=iobase;
 146
 147         dev->board_name = this_board->name;
 148
 149 #ifdef PCL724_IRQ
 150         irq=0;
 151         if (this_board->IRQbits!=0) { /* board support IRQ */
 152                 irq=it->options[1];
 153                 if (irq)  {/* we want to use IRQ */
 154                         if (((1<<irq)&this_board->IRQbits)==0) {
 155                                 rt_printk(", IRQ %u is out of allowed range, DISABLING IT",irq);
 156                                 irq=0; /* Bad IRQ */
 157                         } else {
 158                                 if (comedi_request_irq(irq, interrupt_pcl724, 0, "pcl724", dev)) {
 159                                         rt_printk(", unable to allocate IRQ %u, DISABLING IT", irq);
 160                                         irq=0; /* Can't use IRQ */
 161                                 } else {
 162                                         rt_printk(", irq=%u", irq);
 163                                 }
 164                         }
 165                 }
 166         }
 167
 168         dev->irq = irq;
 169 #endif
 170
 171         printk("\n");
 172
 173         n_subdevices=this_board->numofports;
 174         if ((this_board->can_have96)&&((it->options[1]==1)||(it->options[1]==96)))
 175                 n_subdevices=4; // PCL-724 in 96 DIO configuration
 176
 177         if((ret=alloc_subdevices(dev, n_subdevices))<0)
 178                 return ret;
 179
 180         for(i=0;i<dev->n_subdevices;i++){
 181                 if (this_board->is_pet48) {
 182                         subdev_8255_init(dev,dev->subdevices+i,
 183                                 subdev_8255mapped_cb,(unsigned long)(dev->iobase+i*0x1000));
 184                 } else
 185                         subdev_8255_init(dev,dev->subdevices+i,
 186                                 subdev_8255_cb,(unsigned long)(dev->iobase+SIZE_8255*i));
 187         };
 188
 189         return 0;
 190 }
 191
 192
 193 static int pcl724_detach(comedi_device *dev)
 194 {
 195         int i;
 196
 197 //      printk("comedi%d: pcl724: remove\n",dev->minor);
 198
 199         for(i=0;i<dev->n_subdevices;i++){
 200                 subdev_8255_cleanup(dev,dev->subdevices+i);
 201         }
 202
 203 #ifdef PCL724_IRQ
 204         if(dev->irq){
 205                 comedi_free_irq(dev->irq,dev);
 206         }
 207 #endif
 208
 209         release_region(dev->iobase,this_board->io_range);
 210
 211         return 0;
 212 }
 213
 214