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_types.h>
  75 #include <pcmcia/cs.h>
  76 #include <pcmcia/cistpl.h>
  77 #include <pcmcia/cisreg.h>
  78 #include <pcmcia/ds.h>
  79
  80 static struct pcmcia_device *pcmcia_cur_dev;
  81
  82 static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it);
  83
  84 static const struct labpc_board_struct labpc_cs_boards[] = {
  85         {
  86          .name = "daqcard-1200",
  87          .device_id = 0x103,    /* 0x10b is manufacturer id,
  88                                    0x103 is device id */
  89          .ai_speed = 10000,
  90          .bustype = pcmcia_bustype,
  91          .register_layout = labpc_1200_layout,
  92          .has_ao = 1,
  93          .ai_range_table = &range_labpc_1200_ai,
  94          .ai_range_code = labpc_1200_ai_gain_bits,
  95          .ai_range_is_unipolar = labpc_1200_is_unipolar,
  96          .ai_scan_up = 0,
  97          .memory_mapped_io = 0,
  98          },
  99         /* duplicate entry, to support using alternate name */
 100         {
 101          .name = "ni_labpc_cs",
 102          .device_id = 0x103,
 103          .ai_speed = 10000,
 104          .bustype = pcmcia_bustype,
 105          .register_layout = labpc_1200_layout,
 106          .has_ao = 1,
 107          .ai_range_table = &range_labpc_1200_ai,
 108          .ai_range_code = labpc_1200_ai_gain_bits,
 109          .ai_range_is_unipolar = labpc_1200_is_unipolar,
 110          .ai_scan_up = 0,
 111          .memory_mapped_io = 0,
 112          },
 113 };
 114
 115 /*
 116  * Useful for shorthand access to the particular board structure
 117  */
 118 #define thisboard ((const struct labpc_board_struct *)dev->board_ptr)
 119
 120 static struct comedi_driver driver_labpc_cs = {
 121         .driver_name = "ni_labpc_cs",
 122         .module = THIS_MODULE,
 123         .attach = &labpc_attach,
 124         .detach = &labpc_common_detach,
 125         .num_names = ARRAY_SIZE(labpc_cs_boards),
 126         .board_name = &labpc_cs_boards[0].name,
 127         .offset = sizeof(struct labpc_board_struct),
 128 };
 129
 130 static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 131 {
 132         unsigned long iobase = 0;
 133         unsigned int irq = 0;
 134         struct pcmcia_device *link;
 135
 136         /* allocate and initialize dev->private */
 137         if (alloc_private(dev, sizeof(struct labpc_private)) < 0)
 138                 return -ENOMEM;
 139
 140         /*  get base address, irq etc. based on bustype */
 141         switch (thisboard->bustype) {
 142         case pcmcia_bustype:
 143                 link = pcmcia_cur_dev;  /* XXX hack */
 144                 if (!link)
 145                         return -EIO;
 146                 iobase = link->io.BasePort1;
 147                 irq = link->irq;
 148                 break;
 149         default:
 150                 printk("bug! couldn't determine board type\n");
 151                 return -EINVAL;
 152                 break;
 153         }
 154         return labpc_common_attach(dev, iobase, irq, 0);
 155 }
 156
 157 /*====================================================================*/
 158
 159 /*
 160    The event() function is this driver's Card Services event handler.
 161    It will be called by Card Services when an appropriate card status
 162    event is received.  The config() and release() entry points are
 163    used to configure or release a socket, in response to card
 164    insertion and ejection events.  They are invoked from the dummy
 165    event handler.
 166
 167    Kernel version 2.6.16 upwards uses suspend() and resume() functions
 168    instead of an event() function.
 169 */
 170
 171 static void labpc_config(struct pcmcia_device *link);
 172 static void labpc_release(struct pcmcia_device *link);
 173 static int labpc_cs_suspend(struct pcmcia_device *p_dev);
 174 static int labpc_cs_resume(struct pcmcia_device *p_dev);
 175
 176 /*
 177    The attach() and detach() entry points are used to create and destroy
 178    "instances" of the driver, where each instance represents everything
 179    needed to manage one actual PCMCIA card.
 180 */
 181
 182 static int labpc_cs_attach(struct pcmcia_device *);
 183 static void labpc_cs_detach(struct pcmcia_device *);
 184
 185 /*
 186    You'll also need to prototype all the functions that will actually
 187    be used to talk to your device.  See 'memory_cs' for a good example
 188    of a fully self-sufficient driver; the other drivers rely more or
 189    less on other parts of the kernel.
 190 */
 191
 192 /*
 193    The dev_info variable is the "key" that is used to match up this
 194    device driver with appropriate cards, through the card configuration
 195    database.
 196 */
 197
 198 static const dev_info_t dev_info = "daqcard-1200";
 199
 200 struct local_info_t {
 201         struct pcmcia_device *link;
 202         dev_node_t node;
 203         int stop;
 204         struct bus_operations *bus;
 205 };
 206
 207 /*======================================================================
 208
 209     labpc_cs_attach() creates an "instance" of the driver, allocating
 210     local data structures for one device.  The device is registered
 211     with Card Services.
 212
 213     The dev_link structure is initialized, but we don't actually
 214     configure the card at this point -- we wait until we receive a
 215     card insertion event.
 216
 217 ======================================================================*/
 218
 219 static int labpc_cs_attach(struct pcmcia_device *link)
 220 {
 221         struct local_info_t *local;
 222
 223         dev_dbg(&link->dev, "labpc_cs_attach()\n");
 224
 225         /* Allocate space for private device-specific data */
 226         local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
 227         if (!local)
 228                 return -ENOMEM;
 229         local->link = link;
 230         link->priv = local;
 231
 232         /*
 233            General socket configuration defaults can go here.  In this
 234            client, we assume very little, and rely on the CIS for almost
 235            everything.  In most clients, many details (i.e., number, sizes,
 236            and attributes of IO windows) are fixed by the nature of the
 237            device, and can be hard-wired here.
 238          */
 239         link->conf.Attributes = 0;
 240         link->conf.IntType = INT_MEMORY_AND_IO;
 241
 242         pcmcia_cur_dev = link;
 243
 244         labpc_config(link);
 245
 246         return 0;
 247 }                               /* labpc_cs_attach */
 248
 249 /*======================================================================
 250
 251     This deletes a driver "instance".  The device is de-registered
 252     with Card Services.  If it has been released, all local data
 253     structures are freed.  Otherwise, the structures will be freed
 254     when the device is released.
 255
 256 ======================================================================*/
 257
 258 static void labpc_cs_detach(struct pcmcia_device *link)
 259 {
 260         dev_dbg(&link->dev, "labpc_cs_detach\n");
 261
 262         /*
 263            If the device is currently configured and active, we won't
 264            actually delete it yet.  Instead, it is marked so that when
 265            the release() function is called, that will trigger a proper
 266            detach().
 267          */
 268         if (link->dev_node) {
 269                 ((struct local_info_t *)link->priv)->stop = 1;
 270                 labpc_release(link);
 271         }
 272
 273         /* This points to the parent local_info_t struct (may be null) */
 274         kfree(link->priv);
 275
 276 }                               /* labpc_cs_detach */
 277
 278 /*======================================================================
 279
 280     labpc_config() is scheduled to run after a CARD_INSERTION event
 281     is received, to configure the PCMCIA socket, and to make the
 282     device available to the system.
 283
 284 ======================================================================*/
 285
 286 static int labpc_pcmcia_config_loop(struct pcmcia_device *p_dev,
 287                                 cistpl_cftable_entry_t *cfg,
 288                                 cistpl_cftable_entry_t *dflt,
 289                                 unsigned int vcc,
 290                                 void *priv_data)
 291 {
 292         win_req_t *req = priv_data;
 293         memreq_t map;
 294
 295         if (cfg->index == 0)
 296                 return -ENODEV;
 297
 298         /* Does this card need audio output? */
 299         if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 300                 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
 301                 p_dev->conf.Status = CCSR_AUDIO_ENA;
 302         }
 303
 304         /* Do we need to allocate an interrupt? */
 305         p_dev->conf.Attributes |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
 306
 307         /* IO window settings */
 308         p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
 309         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 310                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 311                 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 312                 if (!(io->flags & CISTPL_IO_8BIT))
 313                         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 314                 if (!(io->flags & CISTPL_IO_16BIT))
 315                         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 316                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 317                 p_dev->io.BasePort1 = io->win[0].base;
 318                 p_dev->io.NumPorts1 = io->win[0].len;
 319                 if (io->nwin > 1) {
 320                         p_dev->io.Attributes2 = p_dev->io.Attributes1;
 321                         p_dev->io.BasePort2 = io->win[1].base;
 322                         p_dev->io.NumPorts2 = io->win[1].len;
 323                 }
 324                 /* This reserves IO space but doesn't actually enable it */
 325                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 326                         return -ENODEV;
 327         }
 328
 329         if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) {
 330                 cistpl_mem_t *mem =
 331                         (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
 332                 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM;
 333                 req->Attributes |= WIN_ENABLE;
 334                 req->Base = mem->win[0].host_addr;
 335                 req->Size = mem->win[0].len;
 336                 if (req->Size < 0x1000)
 337                         req->Size = 0x1000;
 338                 req->AccessSpeed = 0;
 339                 if (pcmcia_request_window(p_dev, req, &p_dev->win))
 340                         return -ENODEV;
 341                 map.Page = 0;
 342                 map.CardOffset = mem->win[0].card_addr;
 343                 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map))
 344                         return -ENODEV;
 345         }
 346         /* If we got this far, we're cool! */
 347         return 0;
 348 }
 349
 350
 351 static void labpc_config(struct pcmcia_device *link)
 352 {
 353         struct local_info_t *dev = link->priv;
 354         int ret;
 355         win_req_t req;
 356
 357         dev_dbg(&link->dev, "labpc_config\n");
 358
 359         ret = pcmcia_loop_config(link, labpc_pcmcia_config_loop, &req);
 360         if (ret) {
 361                 dev_warn(&link->dev, "no configuration found\n");
 362                 goto failed;
 363         }
 364
 365         if (!link->irq)
 366                 goto failed;
 367
 368         /*
 369            This actually configures the PCMCIA socket -- setting up
 370            the I/O windows and the interrupt mapping, and putting the
 371            card and host interface into "Memory and IO" mode.
 372          */
 373         ret = pcmcia_request_configuration(link, &link->conf);
 374         if (ret)
 375                 goto failed;
 376
 377         /*
 378            At this point, the dev_node_t structure(s) need to be
 379            initialized and arranged in a linked list at link->dev.
 380          */
 381         sprintf(dev->node.dev_name, "daqcard-1200");
 382         dev->node.major = dev->node.minor = 0;
 383         link->dev_node = &dev->node;
 384
 385         /* Finally, report what we've done */
 386         printk(KERN_INFO "%s: index 0x%02x",
 387                dev->node.dev_name, link->conf.ConfigIndex);
 388         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 389                 printk(", irq %d", link->irq);
 390         if (link->io.NumPorts1)
 391                 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 392                        link->io.BasePort1 + link->io.NumPorts1 - 1);
 393         if (link->io.NumPorts2)
 394                 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
 395                        link->io.BasePort2 + link->io.NumPorts2 - 1);
 396         if (link->win)
 397                 printk(", mem 0x%06lx-0x%06lx", req.Base,
 398                        req.Base + req.Size - 1);
 399         printk("\n");
 400
 401         return;
 402
 403 failed:
 404         labpc_release(link);
 405
 406 }                               /* labpc_config */
 407
 408 static void labpc_release(struct pcmcia_device *link)
 409 {
 410         dev_dbg(&link->dev, "labpc_release\n");
 411
 412         pcmcia_disable_device(link);
 413 }                               /* labpc_release */
 414
 415 /*======================================================================
 416
 417     The card status event handler.  Mostly, this schedules other
 418     stuff to run after an event is received.
 419
 420     When a CARD_REMOVAL event is received, we immediately set a
 421     private flag to block future accesses to this device.  All the
 422     functions that actually access the device should check this flag
 423     to make sure the card is still present.
 424
 425 ======================================================================*/
 426
 427 static int labpc_cs_suspend(struct pcmcia_device *link)
 428 {
 429         struct local_info_t *local = link->priv;
 430
 431         /* Mark the device as stopped, to block IO until later */
 432         local->stop = 1;
 433         return 0;
 434 }                               /* labpc_cs_suspend */
 435
 436 static int labpc_cs_resume(struct pcmcia_device *link)
 437 {
 438         struct local_info_t *local = link->priv;
 439
 440         local->stop = 0;
 441         return 0;
 442 }                               /* labpc_cs_resume */
 443
 444 /*====================================================================*/
 445
 446 static struct pcmcia_device_id labpc_cs_ids[] = {
 447         /* N.B. These IDs should match those in labpc_cs_boards (ni_labpc.c) */
 448         PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0103),        /* daqcard-1200 */
 449         PCMCIA_DEVICE_NULL
 450 };
 451
 452 MODULE_DEVICE_TABLE(pcmcia, labpc_cs_ids);
 453
 454 struct pcmcia_driver labpc_cs_driver = {
 455         .probe = labpc_cs_attach,
 456         .remove = labpc_cs_detach,
 457         .suspend = labpc_cs_suspend,
 458         .resume = labpc_cs_resume,
 459         .id_table = labpc_cs_ids,
 460         .owner = THIS_MODULE,
 461         .drv = {
 462                 .name = dev_info,
 463                 },
 464 };
 465
 466 static int __init init_labpc_cs(void)
 467 {
 468         pcmcia_register_driver(&labpc_cs_driver);
 469         return 0;
 470 }
 471
 472 static void __exit exit_labpc_cs(void)
 473 {
 474         pcmcia_unregister_driver(&labpc_cs_driver);
 475 }
 476
 477 int __init labpc_init_module(void)
 478 {
 479         int ret;
 480
 481         ret = init_labpc_cs();
 482         if (ret < 0)
 483                 return ret;
 484
 485         return comedi_driver_register(&driver_labpc_cs);
 486 }
 487
 488 void __exit labpc_exit_module(void)
 489 {
 490         exit_labpc_cs();
 491         comedi_driver_unregister(&driver_labpc_cs);
 492 }
 493
 494 MODULE_LICENSE("GPL");
 495 module_init(labpc_init_module);
 496 module_exit(labpc_exit_module);