ni_daq_dio24.c revision eb14120f743d29744d9475bffec56ff4ad43a749
1/* 2 comedi/drivers/ni_daq_dio24.c 3 Driver for National Instruments PCMCIA DAQ-Card DIO-24 4 Copyright (C) 2002 Daniel Vecino Castel <dvecino@able.es> 5 6 PCMCIA crap at end of file 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. All Rights Reserved. 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_daq_dio24 30Description: National Instruments PCMCIA DAQ-Card DIO-24 31Author: Daniel Vecino Castel <dvecino@able.es> 32Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24) 33Status: ? 34Updated: Thu, 07 Nov 2002 21:53:06 -0800 35 36This is just a wrapper around the 8255.o driver to properly handle 37the PCMCIA interface. 38*/ 39 40 /* #define LABPC_DEBUG *//* enable debugging messages */ 41#undef LABPC_DEBUG 42 43#include <linux/interrupt.h> 44#include <linux/slab.h> 45#include "../comedidev.h" 46 47#include <linux/ioport.h> 48 49#include "8255.h" 50 51#include <pcmcia/cs_types.h> 52#include <pcmcia/cs.h> 53#include <pcmcia/cistpl.h> 54#include <pcmcia/cisreg.h> 55#include <pcmcia/ds.h> 56 57static struct pcmcia_device *pcmcia_cur_dev = NULL; 58 59#define DIO24_SIZE 4 /* size of io region used by board */ 60 61static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it); 62static int dio24_detach(struct comedi_device *dev); 63 64enum dio24_bustype { pcmcia_bustype }; 65 66struct dio24_board_struct { 67 const char *name; 68 int device_id; /* device id for pcmcia board */ 69 enum dio24_bustype bustype; /* PCMCIA */ 70 int have_dio; /* have 8255 chip */ 71 /* function pointers so we can use inb/outb or readb/writeb as appropriate */ 72 unsigned int (*read_byte) (unsigned int address); 73 void (*write_byte) (unsigned int byte, unsigned int address); 74}; 75 76static const struct dio24_board_struct dio24_boards[] = { 77 { 78 .name = "daqcard-dio24", 79 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ 80 .bustype = pcmcia_bustype, 81 .have_dio = 1, 82 }, 83 { 84 .name = "ni_daq_dio24", 85 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ 86 .bustype = pcmcia_bustype, 87 .have_dio = 1, 88 }, 89}; 90 91/* 92 * Useful for shorthand access to the particular board structure 93 */ 94#define thisboard ((const struct dio24_board_struct *)dev->board_ptr) 95 96struct dio24_private { 97 98 int data; /* number of data points left to be taken */ 99}; 100 101#define devpriv ((struct dio24_private *)dev->private) 102 103static struct comedi_driver driver_dio24 = { 104 .driver_name = "ni_daq_dio24", 105 .module = THIS_MODULE, 106 .attach = dio24_attach, 107 .detach = dio24_detach, 108 .num_names = ARRAY_SIZE(dio24_boards), 109 .board_name = &dio24_boards[0].name, 110 .offset = sizeof(struct dio24_board_struct), 111}; 112 113static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it) 114{ 115 struct comedi_subdevice *s; 116 unsigned long iobase = 0; 117#ifdef incomplete 118 unsigned int irq = 0; 119#endif 120 struct pcmcia_device *link; 121 122 /* allocate and initialize dev->private */ 123 if (alloc_private(dev, sizeof(struct dio24_private)) < 0) 124 return -ENOMEM; 125 126 /* get base address, irq etc. based on bustype */ 127 switch (thisboard->bustype) { 128 case pcmcia_bustype: 129 link = pcmcia_cur_dev; /* XXX hack */ 130 if (!link) 131 return -EIO; 132 iobase = link->io.BasePort1; 133#ifdef incomplete 134 irq = link->irq; 135#endif 136 break; 137 default: 138 printk("bug! couldn't determine board type\n"); 139 return -EINVAL; 140 break; 141 } 142 printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor, 143 thisboard->name, iobase); 144#ifdef incomplete 145 if (irq) { 146 printk(", irq %u", irq); 147 } 148#endif 149 150 printk("\n"); 151 152 if (iobase == 0) { 153 printk("io base address is zero!\n"); 154 return -EINVAL; 155 } 156 157 dev->iobase = iobase; 158 159#ifdef incomplete 160 /* grab our IRQ */ 161 dev->irq = irq; 162#endif 163 164 dev->board_name = thisboard->name; 165 166 if (alloc_subdevices(dev, 1) < 0) 167 return -ENOMEM; 168 169 /* 8255 dio */ 170 s = dev->subdevices + 0; 171 subdev_8255_init(dev, s, NULL, dev->iobase); 172 173 return 0; 174}; 175 176static int dio24_detach(struct comedi_device *dev) 177{ 178 printk("comedi%d: ni_daq_dio24: remove\n", dev->minor); 179 180 if (dev->subdevices) 181 subdev_8255_cleanup(dev, dev->subdevices + 0); 182 183 if (thisboard->bustype != pcmcia_bustype && dev->iobase) 184 release_region(dev->iobase, DIO24_SIZE); 185 if (dev->irq) 186 free_irq(dev->irq, dev); 187 188 return 0; 189}; 190 191/* PCMCIA crap -- watch your words! */ 192 193static void dio24_config(struct pcmcia_device *link); 194static void dio24_release(struct pcmcia_device *link); 195static int dio24_cs_suspend(struct pcmcia_device *p_dev); 196static int dio24_cs_resume(struct pcmcia_device *p_dev); 197 198/* 199 The attach() and detach() entry points are used to create and destroy 200 "instances" of the driver, where each instance represents everything 201 needed to manage one actual PCMCIA card. 202*/ 203 204static int dio24_cs_attach(struct pcmcia_device *); 205static void dio24_cs_detach(struct pcmcia_device *); 206 207/* 208 You'll also need to prototype all the functions that will actually 209 be used to talk to your device. See 'memory_cs' for a good example 210 of a fully self-sufficient driver; the other drivers rely more or 211 less on other parts of the kernel. 212*/ 213 214/* 215 The dev_info variable is the "key" that is used to match up this 216 device driver with appropriate cards, through the card configuration 217 database. 218*/ 219 220static const dev_info_t dev_info = "ni_daq_dio24"; 221 222struct local_info_t { 223 struct pcmcia_device *link; 224 dev_node_t node; 225 int stop; 226 struct bus_operations *bus; 227}; 228 229/*====================================================================== 230 231 dio24_cs_attach() creates an "instance" of the driver, allocating 232 local data structures for one device. The device is registered 233 with Card Services. 234 235 The dev_link structure is initialized, but we don't actually 236 configure the card at this point -- we wait until we receive a 237 card insertion event. 238 239======================================================================*/ 240 241static int dio24_cs_attach(struct pcmcia_device *link) 242{ 243 struct local_info_t *local; 244 245 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n"); 246 247 dev_dbg(&link->dev, "dio24_cs_attach()\n"); 248 249 /* Allocate space for private device-specific data */ 250 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); 251 if (!local) 252 return -ENOMEM; 253 local->link = link; 254 link->priv = local; 255 256 /* 257 General socket configuration defaults can go here. In this 258 client, we assume very little, and rely on the CIS for almost 259 everything. In most clients, many details (i.e., number, sizes, 260 and attributes of IO windows) are fixed by the nature of the 261 device, and can be hard-wired here. 262 */ 263 link->conf.Attributes = 0; 264 link->conf.IntType = INT_MEMORY_AND_IO; 265 266 pcmcia_cur_dev = link; 267 268 dio24_config(link); 269 270 return 0; 271} /* dio24_cs_attach */ 272 273/*====================================================================== 274 275 This deletes a driver "instance". The device is de-registered 276 with Card Services. If it has been released, all local data 277 structures are freed. Otherwise, the structures will be freed 278 when the device is released. 279 280======================================================================*/ 281 282static void dio24_cs_detach(struct pcmcia_device *link) 283{ 284 285 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n"); 286 287 dev_dbg(&link->dev, "dio24_cs_detach\n"); 288 289 if (link->dev_node) { 290 ((struct local_info_t *)link->priv)->stop = 1; 291 dio24_release(link); 292 } 293 294 /* This points to the parent local_info_t struct */ 295 if (link->priv) 296 kfree(link->priv); 297 298} /* dio24_cs_detach */ 299 300/*====================================================================== 301 302 dio24_config() is scheduled to run after a CARD_INSERTION event 303 is received, to configure the PCMCIA socket, and to make the 304 device available to the system. 305 306======================================================================*/ 307 308static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev, 309 cistpl_cftable_entry_t *cfg, 310 cistpl_cftable_entry_t *dflt, 311 unsigned int vcc, 312 void *priv_data) 313{ 314 win_req_t *req = priv_data; 315 memreq_t map; 316 317 if (cfg->index == 0) 318 return -ENODEV; 319 320 /* Does this card need audio output? */ 321 if (cfg->flags & CISTPL_CFTABLE_AUDIO) { 322 p_dev->conf.Attributes |= CONF_ENABLE_SPKR; 323 p_dev->conf.Status = CCSR_AUDIO_ENA; 324 } 325 326 /* Do we need to allocate an interrupt? */ 327 p_dev->conf.Attributes |= CONF_ENABLE_IRQ; 328 329 /* IO window settings */ 330 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0; 331 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { 332 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; 333 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; 334 if (!(io->flags & CISTPL_IO_8BIT)) 335 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16; 336 if (!(io->flags & CISTPL_IO_16BIT)) 337 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; 338 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; 339 p_dev->io.BasePort1 = io->win[0].base; 340 p_dev->io.NumPorts1 = io->win[0].len; 341 if (io->nwin > 1) { 342 p_dev->io.Attributes2 = p_dev->io.Attributes1; 343 p_dev->io.BasePort2 = io->win[1].base; 344 p_dev->io.NumPorts2 = io->win[1].len; 345 } 346 /* This reserves IO space but doesn't actually enable it */ 347 if (pcmcia_request_io(p_dev, &p_dev->io) != 0) 348 return -ENODEV; 349 } 350 351 if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) { 352 cistpl_mem_t *mem = 353 (cfg->mem.nwin) ? &cfg->mem : &dflt->mem; 354 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM; 355 req->Attributes |= WIN_ENABLE; 356 req->Base = mem->win[0].host_addr; 357 req->Size = mem->win[0].len; 358 if (req->Size < 0x1000) 359 req->Size = 0x1000; 360 req->AccessSpeed = 0; 361 if (pcmcia_request_window(p_dev, req, &p_dev->win)) 362 return -ENODEV; 363 map.Page = 0; 364 map.CardOffset = mem->win[0].card_addr; 365 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map)) 366 return -ENODEV; 367 } 368 /* If we got this far, we're cool! */ 369 return 0; 370} 371 372static void dio24_config(struct pcmcia_device *link) 373{ 374 struct local_info_t *dev = link->priv; 375 int ret; 376 win_req_t req; 377 378 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n"); 379 380 dev_dbg(&link->dev, "dio24_config\n"); 381 382 ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, &req); 383 if (ret) { 384 dev_warn(&link->dev, "no configuration found\n"); 385 goto failed; 386 } 387 388 if (!link->irq) 389 goto failed; 390 391 /* 392 This actually configures the PCMCIA socket -- setting up 393 the I/O windows and the interrupt mapping, and putting the 394 card and host interface into "Memory and IO" mode. 395 */ 396 ret = pcmcia_request_configuration(link, &link->conf); 397 if (ret) 398 goto failed; 399 400 /* 401 At this point, the dev_node_t structure(s) need to be 402 initialized and arranged in a linked list at link->dev. 403 */ 404 sprintf(dev->node.dev_name, "ni_daq_dio24"); 405 dev->node.major = dev->node.minor = 0; 406 link->dev_node = &dev->node; 407 408 /* Finally, report what we've done */ 409 printk(KERN_INFO "%s: index 0x%02x", 410 dev->node.dev_name, link->conf.ConfigIndex); 411 if (link->conf.Attributes & CONF_ENABLE_IRQ) 412 printk(", irq %d", link->irq); 413 if (link->io.NumPorts1) 414 printk(", io 0x%04x-0x%04x", link->io.BasePort1, 415 link->io.BasePort1 + link->io.NumPorts1 - 1); 416 if (link->io.NumPorts2) 417 printk(" & 0x%04x-0x%04x", link->io.BasePort2, 418 link->io.BasePort2 + link->io.NumPorts2 - 1); 419 if (link->win) 420 printk(", mem 0x%06lx-0x%06lx", req.Base, 421 req.Base + req.Size - 1); 422 printk("\n"); 423 424 return; 425 426failed: 427 printk(KERN_INFO "Fallo"); 428 dio24_release(link); 429 430} /* dio24_config */ 431 432static void dio24_release(struct pcmcia_device *link) 433{ 434 dev_dbg(&link->dev, "dio24_release\n"); 435 436 pcmcia_disable_device(link); 437} /* dio24_release */ 438 439/*====================================================================== 440 441 The card status event handler. Mostly, this schedules other 442 stuff to run after an event is received. 443 444 When a CARD_REMOVAL event is received, we immediately set a 445 private flag to block future accesses to this device. All the 446 functions that actually access the device should check this flag 447 to make sure the card is still present. 448 449======================================================================*/ 450 451static int dio24_cs_suspend(struct pcmcia_device *link) 452{ 453 struct local_info_t *local = link->priv; 454 455 /* Mark the device as stopped, to block IO until later */ 456 local->stop = 1; 457 return 0; 458} /* dio24_cs_suspend */ 459 460static int dio24_cs_resume(struct pcmcia_device *link) 461{ 462 struct local_info_t *local = link->priv; 463 464 local->stop = 0; 465 return 0; 466} /* dio24_cs_resume */ 467 468/*====================================================================*/ 469 470static struct pcmcia_device_id dio24_cs_ids[] = { 471 /* N.B. These IDs should match those in dio24_boards */ 472 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */ 473 PCMCIA_DEVICE_NULL 474}; 475 476MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids); 477 478struct pcmcia_driver dio24_cs_driver = { 479 .probe = dio24_cs_attach, 480 .remove = dio24_cs_detach, 481 .suspend = dio24_cs_suspend, 482 .resume = dio24_cs_resume, 483 .id_table = dio24_cs_ids, 484 .owner = THIS_MODULE, 485 .drv = { 486 .name = dev_info, 487 }, 488}; 489 490static int __init init_dio24_cs(void) 491{ 492 printk("ni_daq_dio24: HOLA SOY YO!\n"); 493 pcmcia_register_driver(&dio24_cs_driver); 494 return 0; 495} 496 497static void __exit exit_dio24_cs(void) 498{ 499 pcmcia_unregister_driver(&dio24_cs_driver); 500} 501 502int __init init_module(void) 503{ 504 int ret; 505 506 ret = init_dio24_cs(); 507 if (ret < 0) 508 return ret; 509 510 return comedi_driver_register(&driver_dio24); 511} 512 513void __exit cleanup_module(void) 514{ 515 exit_dio24_cs(); 516 comedi_driver_unregister(&driver_dio24); 517} 518