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