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                                 void *priv_data)
 265 {
 266         if (p_dev->config_index == 0)
 267                 return -EINVAL;
 268
 269         return pcmcia_request_io(p_dev);
 270 }
 271
 272
 273 static void labpc_config(struct pcmcia_device *link)
 274 {
 275         int ret;
 276
 277         dev_dbg(&link->dev, "labpc_config\n");
 278
 279         link->config_flags |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ |
 280                 CONF_AUTO_AUDIO | CONF_AUTO_SET_IO;
 281
 282         ret = pcmcia_loop_config(link, labpc_pcmcia_config_loop, NULL);
 283         if (ret) {
 284                 dev_warn(&link->dev, "no configuration found\n");
 285                 goto failed;
 286         }
 287
 288         if (!link->irq)
 289                 goto failed;
 290
 291         /*
 292            This actually configures the PCMCIA socket -- setting up
 293            the I/O windows and the interrupt mapping, and putting the
 294            card and host interface into "Memory and IO" mode.
 295          */
 296         ret = pcmcia_enable_device(link);
 297         if (ret)
 298                 goto failed;
 299
 300         return;
 301
 302 failed:
 303         labpc_release(link);
 304
 305 }                               /* labpc_config */
 306
 307 static void labpc_release(struct pcmcia_device *link)
 308 {
 309         dev_dbg(&link->dev, "labpc_release\n");
 310
 311         pcmcia_disable_device(link);
 312 }                               /* labpc_release */
 313
 314 /*======================================================================
 315
 316     The card status event handler.  Mostly, this schedules other
 317     stuff to run after an event is received.
 318
 319     When a CARD_REMOVAL event is received, we immediately set a
 320     private flag to block future accesses to this device.  All the
 321     functions that actually access the device should check this flag
 322     to make sure the card is still present.
 323
 324 ======================================================================*/
 325
 326 static int labpc_cs_suspend(struct pcmcia_device *link)
 327 {
 328         struct local_info_t *local = link->priv;
 329
 330         /* Mark the device as stopped, to block IO until later */
 331         local->stop = 1;
 332         return 0;
 333 }                               /* labpc_cs_suspend */
 334
 335 static int labpc_cs_resume(struct pcmcia_device *link)
 336 {
 337         struct local_info_t *local = link->priv;
 338
 339         local->stop = 0;
 340         return 0;
 341 }                               /* labpc_cs_resume */
 342
 343 /*====================================================================*/
 344
 345 static struct pcmcia_device_id labpc_cs_ids[] = {
 346         /* N.B. These IDs should match those in labpc_cs_boards (ni_labpc.c) */
 347         PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0103),        /* daqcard-1200 */
 348         PCMCIA_DEVICE_NULL
 349 };
 350
 351 MODULE_DEVICE_TABLE(pcmcia, labpc_cs_ids);
 352 MODULE_AUTHOR("Frank Mori Hess <fmhess@users.sourceforge.net>");
 353 MODULE_DESCRIPTION("Comedi driver for National Instruments Lab-PC");
 354 MODULE_LICENSE("GPL");
 355
 356 struct pcmcia_driver labpc_cs_driver = {
 357         .probe = labpc_cs_attach,
 358         .remove = labpc_cs_detach,
 359         .suspend = labpc_cs_suspend,
 360         .resume = labpc_cs_resume,
 361         .id_table = labpc_cs_ids,
 362         .owner = THIS_MODULE,
 363         .name = "daqcard-1200",
 364 };
 365
 366 static int __init init_labpc_cs(void)
 367 {
 368         pcmcia_register_driver(&labpc_cs_driver);
 369         return 0;
 370 }
 371
 372 static void __exit exit_labpc_cs(void)
 373 {
 374         pcmcia_unregister_driver(&labpc_cs_driver);
 375 }
 376
 377 int __init labpc_init_module(void)
 378 {
 379         int ret;
 380
 381         ret = init_labpc_cs();
 382         if (ret < 0)
 383                 return ret;
 384
 385         return comedi_driver_register(&driver_labpc_cs);
 386 }
 387
 388 void __exit labpc_exit_module(void)
 389 {
 390         exit_labpc_cs();
 391         comedi_driver_unregister(&driver_labpc_cs);
 392 }
 393
 394 module_init(labpc_init_module);
 395 module_exit(labpc_exit_module);