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 static int __init driver_pcl724_init_module(void)
  97 {
  98         return comedi_driver_register(&driver_pcl724);
  99 }
 100
 101 static void __exit driver_pcl724_cleanup_module(void)
 102 {
 103         comedi_driver_unregister(&driver_pcl724);
 104 }
 105
 106 module_init(driver_pcl724_init_module);
 107 module_exit(driver_pcl724_cleanup_module);
 108
 109 static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
 110 {
 111         unsigned long iobase = arg;
 112
 113         if (dir) {
 114                 outb(data, iobase + port);
 115                 return 0;
 116         } else {
 117                 return inb(iobase + port);
 118         }
 119 }
 120
 121 static int subdev_8255mapped_cb(int dir, int port, int data,
 122                                 unsigned long iobase)
 123 {
 124         int movport = SIZE_8255 * (iobase >> 12);
 125
 126         iobase &= 0x0fff;
 127
 128         if (dir) {
 129                 outb(port + movport, iobase);
 130                 outb(data, iobase + 1);
 131                 return 0;
 132         } else {
 133                 outb(port + movport, iobase);
 134                 return inb(iobase + 1);
 135         }
 136 }
 137
 138 static int pcl724_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 139 {
 140         unsigned long iobase;
 141         unsigned int iorange;
 142         int ret, i, n_subdevices;
 143 #ifdef PCL724_IRQ
 144         unsigned int irq;
 145 #endif
 146
 147         iobase = it->options[0];
 148         iorange = this_board->io_range;
 149         if ((this_board->can_have96) && ((it->options[1] == 1)
 150                                          || (it->options[1] == 96)))
 151                 iorange = PCL722_96_SIZE; /* PCL-724 in 96 DIO configuration */
 152         printk(KERN_INFO "comedi%d: pcl724: board=%s, 0x%03lx ", dev->minor,
 153                this_board->name, iobase);
 154         if (!request_region(iobase, iorange, "pcl724")) {
 155                 printk("I/O port conflict\n");
 156                 return -EIO;
 157         }
 158
 159         dev->iobase = iobase;
 160
 161         dev->board_name = this_board->name;
 162
 163 #ifdef PCL724_IRQ
 164         irq = 0;
 165         if (this_board->IRQbits != 0) { /* board support IRQ */
 166                 irq = it->options[1];
 167                 if (irq) {      /* we want to use IRQ */
 168                         if (((1 << irq) & this_board->IRQbits) == 0) {
 169                                 printk(KERN_WARNING
 170                                        ", IRQ %u is out of allowed range, "
 171                                        "DISABLING IT", irq);
 172                                 irq = 0;        /* Bad IRQ */
 173                         } else {
 174                                 if (request_irq
 175                                     (irq, interrupt_pcl724, 0, "pcl724", dev)) {
 176                                         printk(KERN_WARNING
 177                                                ", unable to allocate IRQ %u, "
 178                                                "DISABLING IT", irq);
 179                                         irq = 0;        /* Can't use IRQ */
 180                                 } else {
 181                                         printk(", irq=%u", irq);
 182                                 }
 183                         }
 184                 }
 185         }
 186
 187         dev->irq = irq;
 188 #endif
 189
 190         printk("\n");
 191
 192         n_subdevices = this_board->numofports;
 193         if ((this_board->can_have96) && ((it->options[1] == 1)
 194                                          || (it->options[1] == 96)))
 195                 n_subdevices = 4;       /*  PCL-724 in 96 DIO configuration */
 196
 197         ret = alloc_subdevices(dev, n_subdevices);
 198         if (ret < 0)
 199                 return ret;
 200
 201         for (i = 0; i < dev->n_subdevices; i++) {
 202                 if (this_board->is_pet48) {
 203                         subdev_8255_init(dev, dev->subdevices + i,
 204                                          subdev_8255mapped_cb,
 205                                          (unsigned long)(dev->iobase +
 206                                                          i * 0x1000));
 207                 } else
 208                         subdev_8255_init(dev, dev->subdevices + i,
 209                                          subdev_8255_cb,
 210                                          (unsigned long)(dev->iobase +
 211                                                          SIZE_8255 * i));
 212         };
 213
 214         return 0;
 215 }
 216
 217 static int pcl724_detach(struct comedi_device *dev)
 218 {
 219         int i;
 220
 221         /* printk("comedi%d: pcl724: remove\n",dev->minor); */
 222
 223         for (i = 0; i < dev->n_subdevices; i++)
 224                 subdev_8255_cleanup(dev, dev->subdevices + i);
 225
 226 #ifdef PCL724_IRQ
 227         if (dev->irq)
 228                 free_irq(dev->irq, dev);
 229 #endif
 230
 231         release_region(dev->iobase, this_board->io_range);
 232
 233         return 0;
 234 }
 235
 236 MODULE_AUTHOR("Comedi http://www.comedi.org");
 237 MODULE_DESCRIPTION("Comedi low-level driver");
 238 MODULE_LICENSE("GPL");