drivers/staging/comedi/drivers/ni_labpc_cs.c

   1 /*
   2     comedi/drivers/ni_labpc_cs.c
   3     Driver for National Instruments daqcard-1200 boards
   4     Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
   5
   6     PCMCIA crap 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.
  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_labpc_cs
  30 Description: National Instruments Lab-PC (& compatibles)
  31 Author: Frank Mori Hess <fmhess@users.sourceforge.net>
  32 Devices: [National Instruments] DAQCard-1200 (daqcard-1200)
  33 Status: works
  34
  35 Thanks go to Fredrik Lingvall for much testing and perseverance in
  36 helping to debug daqcard-1200 support.
  37
  38 The 1200 series boards have onboard calibration dacs for correcting
  39 analog input/output offsets and gains.  The proper settings for these
  40 caldacs are stored on the board's eeprom.  To read the caldac values
  41 from the eeprom and store them into a file that can be then be used by
  42 comedilib, use the comedi_calibrate program.
  43
  44 Configuration options:
  45   none
  46
  47 The daqcard-1200 has quirky chanlist requirements
  48 when scanning multiple channels.  Multiple channel scan
  49 sequence must start at highest channel, then decrement down to
  50 channel 0.  Chanlists consisting of all one channel
  51 are also legal, and allow you to pace conversions in bursts.
  52
  53 */
  54
  55 /*
  56
  57 NI manuals:
  58 340988a (daqcard-1200)
  59
  60 */
  61
  62 #undef LABPC_DEBUG  /* debugging messages */
  63
  64 #include "../comedidev.h"
  65
  66 #include <linux/delay.h>
  67 #include <linux/slab.h>
  68
  69 #include "8253.h"
  70 #include "8255.h"
  71 #include "comedi_fc.h"
  72 #include "ni_labpc.h"
  73
  74 #include <pcmcia/cs.h>
  75 #include <pcmcia/cistpl.h>
  76 #include <pcmcia/cisreg.h>
  77 #include <pcmcia/ds.h>
  78
  79 static struct pcmcia_device *pcmcia_cur_dev;
  80
  81 static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it);
  82
  83 static const struct labpc_board_struct labpc_cs_boards[] = {
  84         {
  85          .name = "daqcard-1200",
  86          .device_id = 0x103,    /* 0x10b is manufacturer id,
  87                                    0x103 is device id */
  88          .ai_speed = 10000,
  89          .bustype = pcmcia_bustype,
  90          .register_layout = labpc_1200_layout,
  91          .has_ao = 1,
  92          .ai_range_table = &range_labpc_1200_ai,
  93          .ai_range_code = labpc_1200_ai_gain_bits,
  94          .ai_range_is_unipolar = labpc_1200_is_unipolar,
  95          .ai_scan_up = 0,
  96          .memory_mapped_io = 0,
  97          },
  98         /* duplicate entry, to support using alternate name */
  99         {
 100          .name = "ni_labpc_cs",
 101          .device_id = 0x103,
 102          .ai_speed = 10000,
 103          .bustype = pcmcia_bustype,
 104          .register_layout = labpc_1200_layout,
 105          .has_ao = 1,
 106          .ai_range_table = &range_labpc_1200_ai,
 107          .ai_range_code = labpc_1200_ai_gain_bits,
 108          .ai_range_is_unipolar = labpc_1200_is_unipolar,
 109          .ai_scan_up = 0,
 110          .memory_mapped_io = 0,
 111          },
 112 };
 113
 114 /*
 115  * Useful for shorthand access to the particular board structure
 116  */
 117 #define thisboard ((const struct labpc_board_struct *)dev->board_ptr)
 118
 119 static struct comedi_driver driver_labpc_cs = {
 120         .driver_name = "ni_labpc_cs",
 121         .module = THIS_MODULE,
 122         .attach = &labpc_attach,
 123         .detach = &labpc_common_detach,
 124         .num_names = ARRAY_SIZE(labpc_cs_boards),
 125         .board_name = &labpc_cs_boards[0].name,
 126         .offset = sizeof(struct labpc_board_struct),
 127 };
 128
 129 static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 130 {
 131         unsigned long iobase = 0;
 132         unsigned int irq = 0;
 133         struct pcmcia_device *link;
 134
 135         /* allocate and initialize dev->private */
 136         if (alloc_private(dev, sizeof(struct labpc_private)) < 0)
 137                 return -ENOMEM;
 138
 139         /*  get base address, irq etc. based on bustype */
 140         switch (thisboard->bustype) {
 141         case pcmcia_bustype:
 142                 link = pcmcia_cur_dev;  /* XXX hack */
 143                 if (!link)
 144                         return -EIO;
 145                 iobase = link->resource[0]->start;
 146                 irq = link->irq;
 147                 break;
 148         default:
 149                 printk("bug! couldn't determine board type\n");
 150                 return -EINVAL;
 151                 break;
 152         }
 153         return labpc_common_attach(dev, iobase, irq, 0);
 154 }
 155
 156 /*====================================================================*/
 157
 158 /*
 159    The event() function is this driver's Card Services event handler.
 160    It will be called by Card Services when an appropriate card status
 161    event is received.  The config() and release() entry points are
 162    used to configure or release a socket, in response to card
 163    insertion and ejection events.  They are invoked from the dummy
 164    event handler.
 165
 166    Kernel version 2.6.16 upwards uses suspend() and resume() functions
 167    instead of an event() function.
 168 */
 169
 170 static void labpc_config(struct pcmcia_device *link);
 171 static void labpc_release(struct pcmcia_device *link);
 172 static int labpc_cs_suspend(struct pcmcia_device *p_dev);
 173 static int labpc_cs_resume(struct pcmcia_device *p_dev);
 174
 175 /*
 176    The attach() and detach() entry points are used to create and destroy
 177    "instances" of the driver, where each instance represents everything
 178    needed to manage one actual PCMCIA card.
 179 */
 180
 181 static int labpc_cs_attach(struct pcmcia_device *);
 182 static void labpc_cs_detach(struct pcmcia_device *);
 183
 184 /*
 185    You'll also need to prototype all the functions that will actually
 186    be used to talk to your device.  See 'memory_cs' for a good example
 187    of a fully self-sufficient driver; the other drivers rely more or
 188    less on other parts of the kernel.
 189 */
 190
 191 /*
 192    The dev_info variable is the "key" that is used to match up this
 193    device driver with appropriate cards, through the card configuration
 194    database.
 195 */
 196
 197 static const dev_info_t dev_info = "daqcard-1200";
 198
 199 struct local_info_t {
 200         struct pcmcia_device *link;
 201         int stop;
 202         struct bus_operations *bus;
 203 };
 204
 205 /*======================================================================
 206
 207     labpc_cs_attach() creates an "instance" of the driver, allocating
 208     local data structures for one device.  The device is registered
 209     with Card Services.
 210
 211     The dev_link structure is initialized, but we don't actually
 212     configure the card at this point -- we wait until we receive a
 213     card insertion event.
 214
 215 ======================================================================*/
 216
 217 static int labpc_cs_attach(struct pcmcia_device *link)
 218 {
 219         struct local_info_t *local;
 220
 221         dev_dbg(&link->dev, "labpc_cs_attach()\n");
 222
 223         /* Allocate space for private device-specific data */
 224         local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
 225         if (!local)
 226                 return -ENOMEM;
 227         local->link = link;
 228         link->priv = local;
 229
 230         /*
 231            General socket configuration defaults can go here.  In this
 232            client, we assume very little, and rely on the CIS for almost
 233            everything.  In most clients, many details (i.e., number, sizes,
 234            and attributes of IO windows) are fixed by the nature of the
 235            device, and can be hard-wired here.
 236          */
 237         link->conf.Attributes = 0;
 238         link->conf.IntType = INT_MEMORY_AND_IO;
 239
 240         pcmcia_cur_dev = link;
 241
 242         labpc_config(link);
 243
 244         return 0;
 245 }                               /* labpc_cs_attach */
 246
 247 /*======================================================================
 248
 249     This deletes a driver "instance".  The device is de-registered
 250     with Card Services.  If it has been released, all local data
 251     structures are freed.  Otherwise, the structures will be freed
 252     when the device is released.
 253
 254 ======================================================================*/
 255
 256 static void labpc_cs_detach(struct pcmcia_device *link)
 257 {
 258         dev_dbg(&link->dev, "labpc_cs_detach\n");
 259
 260         /*
 261            If the device is currently configured and active, we won't
 262            actually delete it yet.  Instead, it is marked so that when
 263            the release() function is called, that will trigger a proper
 264            detach().
 265          */
 266         ((struct local_info_t *)link->priv)->stop = 1;
 267         labpc_release(link);
 268
 269         /* This points to the parent local_info_t struct (may be null) */
 270         kfree(link->priv);
 271
 272 }                               /* labpc_cs_detach */
 273
 274 /*======================================================================
 275
 276     labpc_config() is scheduled to run after a CARD_INSERTION event
 277     is received, to configure the PCMCIA socket, and to make the
 278     device available to the system.
 279
 280 ======================================================================*/
 281
 282 static int labpc_pcmcia_config_loop(struct pcmcia_device *p_dev,
 283                                 cistpl_cftable_entry_t *cfg,
 284                                 cistpl_cftable_entry_t *dflt,
 285                                 unsigned int vcc,
 286                                 void *priv_data)
 287 {
 288         win_req_t *req = priv_data;
 289         memreq_t map;
 290
 291         if (cfg->index == 0)
 292                 return -ENODEV;
 293
 294         /* Does this card need audio output? */
 295         if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 296                 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
 297                 p_dev->conf.Status = CCSR_AUDIO_ENA;
 298         }
 299
 300         /* Do we need to allocate an interrupt? */
 301         p_dev->conf.Attributes |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
 302
 303         /* IO window settings */
 304         p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
 305         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 306                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 307                 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
 308                 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 309                 p_dev->resource[0]->flags |=
 310                         pcmcia_io_cfg_data_width(io->flags);
 311                 p_dev->resource[0]->start = io->win[0].base;
 312                 p_dev->resource[0]->end = io->win[0].len;
 313                 if (io->nwin > 1) {
 314                         p_dev->resource[1]->flags = p_dev->resource[0]->flags;
 315                         p_dev->resource[1]->start = io->win[1].base;
 316                         p_dev->resource[1]->end = io->win[1].len;
 317                 }
 318                 /* This reserves IO space but doesn't actually enable it */
 319                 if (pcmcia_request_io(p_dev) != 0)
 320                         return -ENODEV;
 321         }
 322
 323         if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) {
 324                 cistpl_mem_t *mem =
 325                         (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
 326                 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM;
 327                 req->Attributes |= WIN_ENABLE;
 328                 req->Base = mem->win[0].host_addr;
 329                 req->Size = mem->win[0].len;
 330                 if (req->Size < 0x1000)
 331                         req->Size = 0x1000;
 332                 req->AccessSpeed = 0;
 333                 if (pcmcia_request_window(p_dev, req, &p_dev->win))
 334                         return -ENODEV;
 335                 map.Page = 0;
 336                 map.CardOffset = mem->win[0].card_addr;
 337                 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map))
 338                         return -ENODEV;
 339         }
 340         /* If we got this far, we're cool! */
 341         return 0;
 342 }
 343
 344
 345 static void labpc_config(struct pcmcia_device *link)
 346 {
 347         int ret;
 348         win_req_t req;
 349
 350         dev_dbg(&link->dev, "labpc_config\n");
 351
 352         ret = pcmcia_loop_config(link, labpc_pcmcia_config_loop, &req);
 353         if (ret) {
 354                 dev_warn(&link->dev, "no configuration found\n");
 355                 goto failed;
 356         }
 357
 358         if (!link->irq)
 359                 goto failed;
 360
 361         /*
 362            This actually configures the PCMCIA socket -- setting up
 363            the I/O windows and the interrupt mapping, and putting the
 364            card and host interface into "Memory and IO" mode.
 365          */
 366         ret = pcmcia_request_configuration(link, &link->conf);
 367         if (ret)
 368                 goto failed;
 369
 370         /* Finally, report what we've done */
 371         dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
 372         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 373                 printk(", irq %d", link->irq);
 374         if (link->resource[0])
 375                 printk(" & %pR", link->resource[0]);
 376         if (link->resource[1])
 377                 printk(" & %pR", link->resource[1]);
 378         if (link->win)
 379                 printk(", mem 0x%06lx-0x%06lx", req.Base,
 380                        req.Base + req.Size - 1);
 381         printk("\n");
 382
 383         return;
 384
 385 failed:
 386         labpc_release(link);
 387
 388 }                               /* labpc_config */
 389
 390 static void labpc_release(struct pcmcia_device *link)
 391 {
 392         dev_dbg(&link->dev, "labpc_release\n");
 393
 394         pcmcia_disable_device(link);
 395 }                               /* labpc_release */
 396
 397 /*======================================================================
 398
 399     The card status event handler.  Mostly, this schedules other
 400     stuff to run after an event is received.
 401
 402     When a CARD_REMOVAL event is received, we immediately set a
 403     private flag to block future accesses to this device.  All the
 404     functions that actually access the device should check this flag
 405     to make sure the card is still present.
 406
 407 ======================================================================*/
 408
 409 static int labpc_cs_suspend(struct pcmcia_device *link)
 410 {
 411         struct local_info_t *local = link->priv;
 412
 413         /* Mark the device as stopped, to block IO until later */
 414         local->stop = 1;
 415         return 0;
 416 }                               /* labpc_cs_suspend */
 417
 418 static int labpc_cs_resume(struct pcmcia_device *link)
 419 {
 420         struct local_info_t *local = link->priv;
 421
 422         local->stop = 0;
 423         return 0;
 424 }                               /* labpc_cs_resume */
 425
 426 /*====================================================================*/
 427
 428 static struct pcmcia_device_id labpc_cs_ids[] = {
 429         /* N.B. These IDs should match those in labpc_cs_boards (ni_labpc.c) */
 430         PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0103),        /* daqcard-1200 */
 431         PCMCIA_DEVICE_NULL
 432 };
 433
 434 MODULE_DEVICE_TABLE(pcmcia, labpc_cs_ids);
 435 MODULE_AUTHOR("Frank Mori Hess <fmhess@users.sourceforge.net>");
 436 MODULE_DESCRIPTION("Comedi driver for National Instruments Lab-PC");
 437 MODULE_LICENSE("GPL");
 438
 439 struct pcmcia_driver labpc_cs_driver = {
 440         .probe = labpc_cs_attach,
 441         .remove = labpc_cs_detach,
 442         .suspend = labpc_cs_suspend,
 443         .resume = labpc_cs_resume,
 444         .id_table = labpc_cs_ids,
 445         .owner = THIS_MODULE,
 446         .drv = {
 447                 .name = dev_info,
 448                 },
 449 };
 450
 451 static int __init init_labpc_cs(void)
 452 {
 453         pcmcia_register_driver(&labpc_cs_driver);
 454         return 0;
 455 }
 456
 457 static void __exit exit_labpc_cs(void)
 458 {
 459         pcmcia_unregister_driver(&labpc_cs_driver);
 460 }
 461
 462 int __init labpc_init_module(void)
 463 {
 464         int ret;
 465
 466         ret = init_labpc_cs();
 467         if (ret < 0)
 468                 return ret;
 469
 470         return comedi_driver_register(&driver_labpc_cs);
 471 }
 472
 473 void __exit labpc_exit_module(void)
 474 {
 475         exit_labpc_cs();
 476         comedi_driver_unregister(&driver_labpc_cs);
 477 }
 478
 479 module_init(labpc_init_module);
 480 module_exit(labpc_exit_module);