drivers/staging/comedi/drivers/ni_daq_dio24.c

   1 /*
   2     comedi/drivers/ni_daq_dio24.c
   3     Driver for National Instruments PCMCIA DAQ-Card DIO-24
   4     Copyright (C) 2002 Daniel Vecino Castel <dvecino@able.es>
   5
   6     PCMCIA crap at end of file is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13
   7     from the pcmcia package.
   8     The initial developer of the pcmcia dummy_cs.c code is David A. Hinds
   9     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11
  12     This program is free software; you can redistribute it and/or modify
  13     it under the terms of the GNU General Public License as published by
  14     the Free Software Foundation; either version 2 of the License, or
  15     (at your option) any later version.
  16
  17     This program is distributed in the hope that it will be useful,
  18     but WITHOUT ANY WARRANTY; without even the implied warranty of
  19     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20     GNU General Public License for more details.
  21
  22     You should have received a copy of the GNU General Public License
  23     along with this program; if not, write to the Free Software
  24     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25
  26 ************************************************************************
  27 */
  28 /*
  29 Driver: ni_daq_dio24
  30 Description: National Instruments PCMCIA DAQ-Card DIO-24
  31 Author: Daniel Vecino Castel <dvecino@able.es>
  32 Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24)
  33 Status: ?
  34 Updated: Thu, 07 Nov 2002 21:53:06 -0800
  35
  36 This is just a wrapper around the 8255.o driver to properly handle
  37 the PCMCIA interface.
  38 */
  39
  40                             /* #define LABPC_DEBUG *//*  enable debugging messages */
  41 #undef LABPC_DEBUG
  42
  43 #include <linux/interrupt.h>
  44 #include <linux/slab.h>
  45 #include "../comedidev.h"
  46
  47 #include <linux/ioport.h>
  48
  49 #include "8255.h"
  50
  51 #include <pcmcia/cs.h>
  52 #include <pcmcia/cistpl.h>
  53 #include <pcmcia/cisreg.h>
  54 #include <pcmcia/ds.h>
  55
  56 static struct pcmcia_device *pcmcia_cur_dev = NULL;
  57
  58 #define DIO24_SIZE 4            /*  size of io region used by board */
  59
  60 static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it);
  61 static int dio24_detach(struct comedi_device *dev);
  62
  63 enum dio24_bustype { pcmcia_bustype };
  64
  65 struct dio24_board_struct {
  66         const char *name;
  67         int device_id;          /*  device id for pcmcia board */
  68         enum dio24_bustype bustype;     /*  PCMCIA */
  69         int have_dio;           /*  have 8255 chip */
  70         /*  function pointers so we can use inb/outb or readb/writeb as appropriate */
  71         unsigned int (*read_byte) (unsigned int address);
  72         void (*write_byte) (unsigned int byte, unsigned int address);
  73 };
  74
  75 static const struct dio24_board_struct dio24_boards[] = {
  76         {
  77          .name = "daqcard-dio24",
  78          .device_id = 0x475c,   /*  0x10b is manufacturer id, 0x475c is device id */
  79          .bustype = pcmcia_bustype,
  80          .have_dio = 1,
  81          },
  82         {
  83          .name = "ni_daq_dio24",
  84          .device_id = 0x475c,   /*  0x10b is manufacturer id, 0x475c is device id */
  85          .bustype = pcmcia_bustype,
  86          .have_dio = 1,
  87          },
  88 };
  89
  90 /*
  91  * Useful for shorthand access to the particular board structure
  92  */
  93 #define thisboard ((const struct dio24_board_struct *)dev->board_ptr)
  94
  95 struct dio24_private {
  96
  97         int data;               /* number of data points left to be taken */
  98 };
  99
 100 #define devpriv ((struct dio24_private *)dev->private)
 101
 102 static struct comedi_driver driver_dio24 = {
 103         .driver_name = "ni_daq_dio24",
 104         .module = THIS_MODULE,
 105         .attach = dio24_attach,
 106         .detach = dio24_detach,
 107         .num_names = ARRAY_SIZE(dio24_boards),
 108         .board_name = &dio24_boards[0].name,
 109         .offset = sizeof(struct dio24_board_struct),
 110 };
 111
 112 static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 113 {
 114         struct comedi_subdevice *s;
 115         unsigned long iobase = 0;
 116 #ifdef incomplete
 117         unsigned int irq = 0;
 118 #endif
 119         struct pcmcia_device *link;
 120
 121         /* allocate and initialize dev->private */
 122         if (alloc_private(dev, sizeof(struct dio24_private)) < 0)
 123                 return -ENOMEM;
 124
 125         /*  get base address, irq etc. based on bustype */
 126         switch (thisboard->bustype) {
 127         case pcmcia_bustype:
 128                 link = pcmcia_cur_dev;  /* XXX hack */
 129                 if (!link)
 130                         return -EIO;
 131                 iobase = link->resource[0]->start;
 132 #ifdef incomplete
 133                 irq = link->irq;
 134 #endif
 135                 break;
 136         default:
 137                 printk("bug! couldn't determine board type\n");
 138                 return -EINVAL;
 139                 break;
 140         }
 141         printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
 142                thisboard->name, iobase);
 143 #ifdef incomplete
 144         if (irq) {
 145                 printk(", irq %u", irq);
 146         }
 147 #endif
 148
 149         printk("\n");
 150
 151         if (iobase == 0) {
 152                 printk("io base address is zero!\n");
 153                 return -EINVAL;
 154         }
 155
 156         dev->iobase = iobase;
 157
 158 #ifdef incomplete
 159         /* grab our IRQ */
 160         dev->irq = irq;
 161 #endif
 162
 163         dev->board_name = thisboard->name;
 164
 165         if (alloc_subdevices(dev, 1) < 0)
 166                 return -ENOMEM;
 167
 168         /* 8255 dio */
 169         s = dev->subdevices + 0;
 170         subdev_8255_init(dev, s, NULL, dev->iobase);
 171
 172         return 0;
 173 };
 174
 175 static int dio24_detach(struct comedi_device *dev)
 176 {
 177         printk("comedi%d: ni_daq_dio24: remove\n", dev->minor);
 178
 179         if (dev->subdevices)
 180                 subdev_8255_cleanup(dev, dev->subdevices + 0);
 181
 182         if (thisboard->bustype != pcmcia_bustype && dev->iobase)
 183                 release_region(dev->iobase, DIO24_SIZE);
 184         if (dev->irq)
 185                 free_irq(dev->irq, dev);
 186
 187         return 0;
 188 };
 189
 190 /* PCMCIA crap -- watch your words! */
 191
 192 static void dio24_config(struct pcmcia_device *link);
 193 static void dio24_release(struct pcmcia_device *link);
 194 static int dio24_cs_suspend(struct pcmcia_device *p_dev);
 195 static int dio24_cs_resume(struct pcmcia_device *p_dev);
 196
 197 /*
 198    The attach() and detach() entry points are used to create and destroy
 199    "instances" of the driver, where each instance represents everything
 200    needed to manage one actual PCMCIA card.
 201 */
 202
 203 static int dio24_cs_attach(struct pcmcia_device *);
 204 static void dio24_cs_detach(struct pcmcia_device *);
 205
 206 /*
 207    You'll also need to prototype all the functions that will actually
 208    be used to talk to your device.  See 'memory_cs' for a good example
 209    of a fully self-sufficient driver; the other drivers rely more or
 210    less on other parts of the kernel.
 211 */
 212
 213 /*
 214    The dev_info variable is the "key" that is used to match up this
 215    device driver with appropriate cards, through the card configuration
 216    database.
 217 */
 218
 219 static const dev_info_t dev_info = "ni_daq_dio24";
 220
 221 struct local_info_t {
 222         struct pcmcia_device *link;
 223         int stop;
 224         struct bus_operations *bus;
 225 };
 226
 227 /*======================================================================
 228
 229     dio24_cs_attach() creates an "instance" of the driver, allocating
 230     local data structures for one device.  The device is registered
 231     with Card Services.
 232
 233     The dev_link structure is initialized, but we don't actually
 234     configure the card at this point -- we wait until we receive a
 235     card insertion event.
 236
 237 ======================================================================*/
 238
 239 static int dio24_cs_attach(struct pcmcia_device *link)
 240 {
 241         struct local_info_t *local;
 242
 243         printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
 244
 245         dev_dbg(&link->dev, "dio24_cs_attach()\n");
 246
 247         /* Allocate space for private device-specific data */
 248         local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
 249         if (!local)
 250                 return -ENOMEM;
 251         local->link = link;
 252         link->priv = local;
 253
 254         /*
 255            General socket configuration defaults can go here.  In this
 256            client, we assume very little, and rely on the CIS for almost
 257            everything.  In most clients, many details (i.e., number, sizes,
 258            and attributes of IO windows) are fixed by the nature of the
 259            device, and can be hard-wired here.
 260          */
 261         link->conf.Attributes = 0;
 262         link->conf.IntType = INT_MEMORY_AND_IO;
 263
 264         pcmcia_cur_dev = link;
 265
 266         dio24_config(link);
 267
 268         return 0;
 269 }                               /* dio24_cs_attach */
 270
 271 /*======================================================================
 272
 273     This deletes a driver "instance".  The device is de-registered
 274     with Card Services.  If it has been released, all local data
 275     structures are freed.  Otherwise, the structures will be freed
 276     when the device is released.
 277
 278 ======================================================================*/
 279
 280 static void dio24_cs_detach(struct pcmcia_device *link)
 281 {
 282
 283         printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
 284
 285         dev_dbg(&link->dev, "dio24_cs_detach\n");
 286
 287         ((struct local_info_t *)link->priv)->stop = 1;
 288         dio24_release(link);
 289
 290         /* This points to the parent local_info_t struct */
 291         if (link->priv)
 292                 kfree(link->priv);
 293
 294 }                               /* dio24_cs_detach */
 295
 296 /*======================================================================
 297
 298     dio24_config() is scheduled to run after a CARD_INSERTION event
 299     is received, to configure the PCMCIA socket, and to make the
 300     device available to the system.
 301
 302 ======================================================================*/
 303
 304 static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
 305                                 cistpl_cftable_entry_t *cfg,
 306                                 cistpl_cftable_entry_t *dflt,
 307                                 unsigned int vcc,
 308                                 void *priv_data)
 309 {
 310         win_req_t *req = priv_data;
 311         memreq_t map;
 312
 313         if (cfg->index == 0)
 314                 return -ENODEV;
 315
 316         /* Does this card need audio output? */
 317         if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 318                 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
 319                 p_dev->conf.Status = CCSR_AUDIO_ENA;
 320         }
 321
 322         /* Do we need to allocate an interrupt? */
 323         p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 324
 325         /* IO window settings */
 326         p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
 327         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 328                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 329                 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
 330                 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 331                 p_dev->resource[0]->flags |=
 332                         pcmcia_io_cfg_data_width(io->flags);
 333                 p_dev->resource[0]->start = io->win[0].base;
 334                 p_dev->resource[0]->end = io->win[0].len;
 335                 if (io->nwin > 1) {
 336                         p_dev->resource[1]->flags = p_dev->resource[0]->flags;
 337                         p_dev->resource[1]->start = io->win[1].base;
 338                         p_dev->resource[1]->end = io->win[1].len;
 339                 }
 340                 /* This reserves IO space but doesn't actually enable it */
 341                 if (pcmcia_request_io(p_dev) != 0)
 342                         return -ENODEV;
 343         }
 344
 345         if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) {
 346                 cistpl_mem_t *mem =
 347                         (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
 348                 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM;
 349                 req->Attributes |= WIN_ENABLE;
 350                 req->Base = mem->win[0].host_addr;
 351                 req->Size = mem->win[0].len;
 352                 if (req->Size < 0x1000)
 353                         req->Size = 0x1000;
 354                 req->AccessSpeed = 0;
 355                 if (pcmcia_request_window(p_dev, req, &p_dev->win))
 356                         return -ENODEV;
 357                 map.Page = 0;
 358                 map.CardOffset = mem->win[0].card_addr;
 359                 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map))
 360                         return -ENODEV;
 361         }
 362         /* If we got this far, we're cool! */
 363         return 0;
 364 }
 365
 366 static void dio24_config(struct pcmcia_device *link)
 367 {
 368         int ret;
 369         win_req_t req;
 370
 371         printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
 372
 373         dev_dbg(&link->dev, "dio24_config\n");
 374
 375         ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, &req);
 376         if (ret) {
 377                 dev_warn(&link->dev, "no configuration found\n");
 378                 goto failed;
 379         }
 380
 381         if (!link->irq)
 382                 goto failed;
 383
 384         /*
 385            This actually configures the PCMCIA socket -- setting up
 386            the I/O windows and the interrupt mapping, and putting the
 387            card and host interface into "Memory and IO" mode.
 388          */
 389         ret = pcmcia_request_configuration(link, &link->conf);
 390         if (ret)
 391                 goto failed;
 392
 393         /* Finally, report what we've done */
 394         dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
 395         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 396                 printk(", irq %d", link->irq);
 397         if (link->resource[0])
 398                 printk(" & %pR", link->resource[0]);
 399         if (link->resource[1])
 400                 printk(" & %pR", link->resource[1]);
 401         if (link->win)
 402                 printk(", mem 0x%06lx-0x%06lx", req.Base,
 403                        req.Base + req.Size - 1);
 404         printk("\n");
 405
 406         return;
 407
 408 failed:
 409         printk(KERN_INFO "Fallo");
 410         dio24_release(link);
 411
 412 }                               /* dio24_config */
 413
 414 static void dio24_release(struct pcmcia_device *link)
 415 {
 416         dev_dbg(&link->dev, "dio24_release\n");
 417
 418         pcmcia_disable_device(link);
 419 }                               /* dio24_release */
 420
 421 /*======================================================================
 422
 423     The card status event handler.  Mostly, this schedules other
 424     stuff to run after an event is received.
 425
 426     When a CARD_REMOVAL event is received, we immediately set a
 427     private flag to block future accesses to this device.  All the
 428     functions that actually access the device should check this flag
 429     to make sure the card is still present.
 430
 431 ======================================================================*/
 432
 433 static int dio24_cs_suspend(struct pcmcia_device *link)
 434 {
 435         struct local_info_t *local = link->priv;
 436
 437         /* Mark the device as stopped, to block IO until later */
 438         local->stop = 1;
 439         return 0;
 440 }                               /* dio24_cs_suspend */
 441
 442 static int dio24_cs_resume(struct pcmcia_device *link)
 443 {
 444         struct local_info_t *local = link->priv;
 445
 446         local->stop = 0;
 447         return 0;
 448 }                               /* dio24_cs_resume */
 449
 450 /*====================================================================*/
 451
 452 static struct pcmcia_device_id dio24_cs_ids[] = {
 453         /* N.B. These IDs should match those in dio24_boards */
 454         PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c),        /* daqcard-dio24 */
 455         PCMCIA_DEVICE_NULL
 456 };
 457
 458 MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
 459 MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
 460 MODULE_DESCRIPTION("Comedi driver for National Instruments "
 461                    "PCMCIA DAQ-Card DIO-24");
 462 MODULE_LICENSE("GPL");
 463
 464 struct pcmcia_driver dio24_cs_driver = {
 465         .probe = dio24_cs_attach,
 466         .remove = dio24_cs_detach,
 467         .suspend = dio24_cs_suspend,
 468         .resume = dio24_cs_resume,
 469         .id_table = dio24_cs_ids,
 470         .owner = THIS_MODULE,
 471         .drv = {
 472                 .name = dev_info,
 473                 },
 474 };
 475
 476 static int __init init_dio24_cs(void)
 477 {
 478         printk("ni_daq_dio24: HOLA SOY YO!\n");
 479         pcmcia_register_driver(&dio24_cs_driver);
 480         return 0;
 481 }
 482
 483 static void __exit exit_dio24_cs(void)
 484 {
 485         pcmcia_unregister_driver(&dio24_cs_driver);
 486 }
 487
 488 int __init init_module(void)
 489 {
 490         int ret;
 491
 492         ret = init_dio24_cs();
 493         if (ret < 0)
 494                 return ret;
 495
 496         return comedi_driver_register(&driver_dio24);
 497 }
 498
 499 void __exit cleanup_module(void)
 500 {
 501         exit_dio24_cs();
 502         comedi_driver_unregister(&driver_dio24);
 503 }