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 static int pcl724_attach(struct comedi_device *dev,
  60                          struct comedi_devconfig *it);
  61 static int pcl724_detach(struct comedi_device *dev);
  62
  63 struct pcl724_board {
  64
  65         const char *name;       /*  board name */
  66         int dio;                /*  num of DIO */
  67         int numofports;         /*  num of 8255 subdevices */
  68         unsigned int IRQbits;   /*  allowed interrupts */
  69         unsigned int io_range;  /*  len of IO space */
  70         char can_have96;
  71         char is_pet48;
  72 };
  73
  74 static const struct pcl724_board boardtypes[] = {
  75         {"pcl724", 24, 1, 0x00fc, PCL724_SIZE, 0, 0,},
  76         {"pcl722", 144, 6, 0x00fc, PCL722_SIZE, 1, 0,},
  77         {"pcl731", 48, 2, 0x9cfc, PCL731_SIZE, 0, 0,},
  78         {"acl7122", 144, 6, 0x9ee8, PCL722_SIZE, 1, 0,},
  79         {"acl7124", 24, 1, 0x00fc, PCL724_SIZE, 0, 0,},
  80         {"pet48dio", 48, 2, 0x9eb8, PET48_SIZE, 0, 1,},
  81 };
  82
  83 #define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcl724_board))
  84 #define this_board ((const struct pcl724_board *)dev->board_ptr)
  85
  86 static struct comedi_driver driver_pcl724 = {
  87         .driver_name = "pcl724",
  88         .module = THIS_MODULE,
  89         .attach = pcl724_attach,
  90         .detach = pcl724_detach,
  91         .board_name = &boardtypes[0].name,
  92         .num_names = n_boardtypes,
  93         .offset = sizeof(struct pcl724_board),
  94 };
  95
  96 COMEDI_INITCLEANUP(driver_pcl724);
  97
  98 static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
  99 {
 100         unsigned long iobase = arg;
 101
 102         if (dir) {
 103                 outb(data, iobase + port);
 104                 return 0;
 105         } else {
 106                 return inb(iobase + port);
 107         }
 108 }
 109
 110 static int subdev_8255mapped_cb(int dir, int port, int data,
 111                                 unsigned long iobase)
 112 {
 113         int movport = SIZE_8255 * (iobase >> 12);
 114
 115         iobase &= 0x0fff;
 116
 117         if (dir) {
 118                 outb(port + movport, iobase);
 119                 outb(data, iobase + 1);
 120                 return 0;
 121         } else {
 122                 outb(port + movport, iobase);
 123                 return inb(iobase + 1);
 124         }
 125 }
 126
 127 static int pcl724_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 128 {
 129         unsigned long iobase;
 130         unsigned int iorange;
 131         int ret, i, n_subdevices;
 132 #ifdef PCL724_IRQ
 133         unsigned int irq;
 134 #endif
 135
 136         iobase = it->options[0];
 137         iorange = this_board->io_range;
 138         if ((this_board->can_have96) && ((it->options[1] == 1)
 139                                          || (it->options[1] == 96)))
 140                 iorange = PCL722_96_SIZE; /* PCL-724 in 96 DIO configuration */
 141         printk(KERN_INFO "comedi%d: pcl724: board=%s, 0x%03lx ", dev->minor,
 142                this_board->name, iobase);
 143         if (!request_region(iobase, iorange, "pcl724")) {
 144                 printk("I/O port conflict\n");
 145                 return -EIO;
 146         }
 147
 148         dev->iobase = iobase;
 149
 150         dev->board_name = this_board->name;
 151
 152 #ifdef PCL724_IRQ
 153         irq = 0;
 154         if (this_board->IRQbits != 0) { /* board support IRQ */
 155                 irq = it->options[1];
 156                 if (irq) {      /* we want to use IRQ */
 157                         if (((1 << irq) & this_board->IRQbits) == 0) {
 158                                 printk(KERN_WARNING
 159                                        ", IRQ %u is out of allowed range, "
 160                                        "DISABLING IT", irq);
 161                                 irq = 0;        /* Bad IRQ */
 162                         } else {
 163                                 if (request_irq
 164                                     (irq, interrupt_pcl724, 0, "pcl724", dev)) {
 165                                         printk(KERN_WARNING
 166                                                ", unable to allocate IRQ %u, "
 167                                                "DISABLING IT", irq);
 168                                         irq = 0;        /* Can't use IRQ */
 169                                 } else {
 170                                         printk(", irq=%u", irq);
 171                                 }
 172                         }
 173                 }
 174         }
 175
 176         dev->irq = irq;
 177 #endif
 178
 179         printk("\n");
 180
 181         n_subdevices = this_board->numofports;
 182         if ((this_board->can_have96) && ((it->options[1] == 1)
 183                                          || (it->options[1] == 96)))
 184                 n_subdevices = 4;       /*  PCL-724 in 96 DIO configuration */
 185
 186         ret = alloc_subdevices(dev, n_subdevices);
 187         if (ret < 0)
 188                 return ret;
 189
 190         for (i = 0; i < dev->n_subdevices; i++) {
 191                 if (this_board->is_pet48) {
 192                         subdev_8255_init(dev, dev->subdevices + i,
 193                                          subdev_8255mapped_cb,
 194                                          (unsigned long)(dev->iobase +
 195                                                          i * 0x1000));
 196                 } else
 197                         subdev_8255_init(dev, dev->subdevices + i,
 198                                          subdev_8255_cb,
 199                                          (unsigned long)(dev->iobase +
 200                                                          SIZE_8255 * i));
 201         };
 202
 203         return 0;
 204 }
 205
 206 static int pcl724_detach(struct comedi_device *dev)
 207 {
 208         int i;
 209
 210         /* printk("comedi%d: pcl724: remove\n",dev->minor); */
 211
 212         for (i = 0; i < dev->n_subdevices; i++)
 213                 subdev_8255_cleanup(dev, dev->subdevices + i);
 214
 215 #ifdef PCL724_IRQ
 216         if (dev->irq)
 217                 free_irq(dev->irq, dev);
 218 #endif
 219
 220         release_region(dev->iobase, this_board->io_range);
 221
 222         return 0;
 223 }