ni_labpc_cs.c revision 0f52e86ded65749c6037473013ad77b2afa4f68d
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/* 29Driver: ni_labpc_cs 30Description: National Instruments Lab-PC (& compatibles) 31Author: Frank Mori Hess <fmhess@users.sourceforge.net> 32Devices: [National Instruments] DAQCard-1200 (daqcard-1200) 33Status: works 34 35Thanks go to Fredrik Lingvall for much testing and perseverance in 36helping to debug daqcard-1200 support. 37 38The 1200 series boards have onboard calibration dacs for correcting 39analog input/output offsets and gains. The proper settings for these 40caldacs are stored on the board's eeprom. To read the caldac values 41from the eeprom and store them into a file that can be then be used by 42comedilib, use the comedi_calibrate program. 43 44Configuration options: 45 none 46 47The daqcard-1200 has quirky chanlist requirements 48when scanning multiple channels. Multiple channel scan 49sequence must start at highest channel, then decrement down to 50channel 0. Chanlists consisting of all one channel 51are also legal, and allow you to pace conversions in bursts. 52 53*/ 54 55/* 56 57NI manuals: 58340988a (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 79static struct pcmcia_device *pcmcia_cur_dev; 80 81static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it); 82 83static 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 119static 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 129static 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 170static void labpc_config(struct pcmcia_device *link); 171static void labpc_release(struct pcmcia_device *link); 172static int labpc_cs_suspend(struct pcmcia_device *p_dev); 173static 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 181static int labpc_cs_attach(struct pcmcia_device *); 182static 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 197static const dev_info_t dev_info = "daqcard-1200"; 198 199struct 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 217static 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 256static 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 282static 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 if (cfg->index == 0) 289 return -ENODEV; 290 291 /* Does this card need audio output? */ 292 if (cfg->flags & CISTPL_CFTABLE_AUDIO) { 293 p_dev->conf.Attributes |= CONF_ENABLE_SPKR; 294 p_dev->conf.Status = CCSR_AUDIO_ENA; 295 } 296 297 /* Do we need to allocate an interrupt? */ 298 p_dev->conf.Attributes |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ; 299 300 /* IO window settings */ 301 p_dev->resource[0]->end = p_dev->resource[1]->end = 0; 302 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { 303 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; 304 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK; 305 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; 306 p_dev->resource[0]->flags |= 307 pcmcia_io_cfg_data_width(io->flags); 308 p_dev->resource[0]->start = io->win[0].base; 309 p_dev->resource[0]->end = io->win[0].len; 310 if (io->nwin > 1) { 311 p_dev->resource[1]->flags = p_dev->resource[0]->flags; 312 p_dev->resource[1]->start = io->win[1].base; 313 p_dev->resource[1]->end = io->win[1].len; 314 } 315 /* This reserves IO space but doesn't actually enable it */ 316 if (pcmcia_request_io(p_dev) != 0) 317 return -ENODEV; 318 } 319 320 /* If we got this far, we're cool! */ 321 return 0; 322} 323 324 325static void labpc_config(struct pcmcia_device *link) 326{ 327 int ret; 328 329 dev_dbg(&link->dev, "labpc_config\n"); 330 331 ret = pcmcia_loop_config(link, labpc_pcmcia_config_loop, NULL); 332 if (ret) { 333 dev_warn(&link->dev, "no configuration found\n"); 334 goto failed; 335 } 336 337 if (!link->irq) 338 goto failed; 339 340 /* 341 This actually configures the PCMCIA socket -- setting up 342 the I/O windows and the interrupt mapping, and putting the 343 card and host interface into "Memory and IO" mode. 344 */ 345 ret = pcmcia_request_configuration(link, &link->conf); 346 if (ret) 347 goto failed; 348 349 /* Finally, report what we've done */ 350 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex); 351 if (link->conf.Attributes & CONF_ENABLE_IRQ) 352 printk(", irq %d", link->irq); 353 if (link->resource[0]) 354 printk(" & %pR", link->resource[0]); 355 if (link->resource[1]) 356 printk(" & %pR", link->resource[1]); 357 printk("\n"); 358 359 return; 360 361failed: 362 labpc_release(link); 363 364} /* labpc_config */ 365 366static void labpc_release(struct pcmcia_device *link) 367{ 368 dev_dbg(&link->dev, "labpc_release\n"); 369 370 pcmcia_disable_device(link); 371} /* labpc_release */ 372 373/*====================================================================== 374 375 The card status event handler. Mostly, this schedules other 376 stuff to run after an event is received. 377 378 When a CARD_REMOVAL event is received, we immediately set a 379 private flag to block future accesses to this device. All the 380 functions that actually access the device should check this flag 381 to make sure the card is still present. 382 383======================================================================*/ 384 385static int labpc_cs_suspend(struct pcmcia_device *link) 386{ 387 struct local_info_t *local = link->priv; 388 389 /* Mark the device as stopped, to block IO until later */ 390 local->stop = 1; 391 return 0; 392} /* labpc_cs_suspend */ 393 394static int labpc_cs_resume(struct pcmcia_device *link) 395{ 396 struct local_info_t *local = link->priv; 397 398 local->stop = 0; 399 return 0; 400} /* labpc_cs_resume */ 401 402/*====================================================================*/ 403 404static struct pcmcia_device_id labpc_cs_ids[] = { 405 /* N.B. These IDs should match those in labpc_cs_boards (ni_labpc.c) */ 406 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0103), /* daqcard-1200 */ 407 PCMCIA_DEVICE_NULL 408}; 409 410MODULE_DEVICE_TABLE(pcmcia, labpc_cs_ids); 411MODULE_AUTHOR("Frank Mori Hess <fmhess@users.sourceforge.net>"); 412MODULE_DESCRIPTION("Comedi driver for National Instruments Lab-PC"); 413MODULE_LICENSE("GPL"); 414 415struct pcmcia_driver labpc_cs_driver = { 416 .probe = labpc_cs_attach, 417 .remove = labpc_cs_detach, 418 .suspend = labpc_cs_suspend, 419 .resume = labpc_cs_resume, 420 .id_table = labpc_cs_ids, 421 .owner = THIS_MODULE, 422 .drv = { 423 .name = dev_info, 424 }, 425}; 426 427static int __init init_labpc_cs(void) 428{ 429 pcmcia_register_driver(&labpc_cs_driver); 430 return 0; 431} 432 433static void __exit exit_labpc_cs(void) 434{ 435 pcmcia_unregister_driver(&labpc_cs_driver); 436} 437 438int __init labpc_init_module(void) 439{ 440 int ret; 441 442 ret = init_labpc_cs(); 443 if (ret < 0) 444 return ret; 445 446 return comedi_driver_register(&driver_labpc_cs); 447} 448 449void __exit labpc_exit_module(void) 450{ 451 exit_labpc_cs(); 452 comedi_driver_unregister(&driver_labpc_cs); 453} 454 455module_init(labpc_init_module); 456module_exit(labpc_exit_module); 457