ni_daq_dio24.c revision 90abdc3b973229bae98dd96649d9f7106cc177a4
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.h> 52#include <pcmcia/cistpl.h> 53#include <pcmcia/cisreg.h> 54#include <pcmcia/ds.h> 55 56static struct pcmcia_device *pcmcia_cur_dev = NULL; 57 58#define DIO24_SIZE 4 /* size of io region used by board */ 59 60static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it); 61static int dio24_detach(struct comedi_device *dev); 62 63enum dio24_bustype { pcmcia_bustype }; 64 65struct dio24_board_struct { 66 const char *name; 67 int device_id; /* device id for pcmcia board */ 68 enum dio24_bustype bustype; /* PCMCIA */ 69 int have_dio; /* have 8255 chip */ 70 /* function pointers so we can use inb/outb or readb/writeb as appropriate */ 71 unsigned int (*read_byte) (unsigned int address); 72 void (*write_byte) (unsigned int byte, unsigned int address); 73}; 74 75static const struct dio24_board_struct dio24_boards[] = { 76 { 77 .name = "daqcard-dio24", 78 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ 79 .bustype = pcmcia_bustype, 80 .have_dio = 1, 81 }, 82 { 83 .name = "ni_daq_dio24", 84 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ 85 .bustype = pcmcia_bustype, 86 .have_dio = 1, 87 }, 88}; 89 90/* 91 * Useful for shorthand access to the particular board structure 92 */ 93#define thisboard ((const struct dio24_board_struct *)dev->board_ptr) 94 95struct dio24_private { 96 97 int data; /* number of data points left to be taken */ 98}; 99 100#define devpriv ((struct dio24_private *)dev->private) 101 102static struct comedi_driver driver_dio24 = { 103 .driver_name = "ni_daq_dio24", 104 .module = THIS_MODULE, 105 .attach = dio24_attach, 106 .detach = dio24_detach, 107 .num_names = ARRAY_SIZE(dio24_boards), 108 .board_name = &dio24_boards[0].name, 109 .offset = sizeof(struct dio24_board_struct), 110}; 111 112static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it) 113{ 114 struct comedi_subdevice *s; 115 unsigned long iobase = 0; 116#ifdef incomplete 117 unsigned int irq = 0; 118#endif 119 struct pcmcia_device *link; 120 121 /* allocate and initialize dev->private */ 122 if (alloc_private(dev, sizeof(struct dio24_private)) < 0) 123 return -ENOMEM; 124 125 /* get base address, irq etc. based on bustype */ 126 switch (thisboard->bustype) { 127 case pcmcia_bustype: 128 link = pcmcia_cur_dev; /* XXX hack */ 129 if (!link) 130 return -EIO; 131 iobase = link->resource[0]->start; 132#ifdef incomplete 133 irq = link->irq; 134#endif 135 break; 136 default: 137 printk("bug! couldn't determine board type\n"); 138 return -EINVAL; 139 break; 140 } 141 printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor, 142 thisboard->name, iobase); 143#ifdef incomplete 144 if (irq) { 145 printk(", irq %u", irq); 146 } 147#endif 148 149 printk("\n"); 150 151 if (iobase == 0) { 152 printk("io base address is zero!\n"); 153 return -EINVAL; 154 } 155 156 dev->iobase = iobase; 157 158#ifdef incomplete 159 /* grab our IRQ */ 160 dev->irq = irq; 161#endif 162 163 dev->board_name = thisboard->name; 164 165 if (alloc_subdevices(dev, 1) < 0) 166 return -ENOMEM; 167 168 /* 8255 dio */ 169 s = dev->subdevices + 0; 170 subdev_8255_init(dev, s, NULL, dev->iobase); 171 172 return 0; 173}; 174 175static int dio24_detach(struct comedi_device *dev) 176{ 177 printk("comedi%d: ni_daq_dio24: remove\n", dev->minor); 178 179 if (dev->subdevices) 180 subdev_8255_cleanup(dev, dev->subdevices + 0); 181 182 if (thisboard->bustype != pcmcia_bustype && dev->iobase) 183 release_region(dev->iobase, DIO24_SIZE); 184 if (dev->irq) 185 free_irq(dev->irq, dev); 186 187 return 0; 188}; 189 190/* PCMCIA crap -- watch your words! */ 191 192static void dio24_config(struct pcmcia_device *link); 193static void dio24_release(struct pcmcia_device *link); 194static int dio24_cs_suspend(struct pcmcia_device *p_dev); 195static int dio24_cs_resume(struct pcmcia_device *p_dev); 196 197/* 198 The attach() and detach() entry points are used to create and destroy 199 "instances" of the driver, where each instance represents everything 200 needed to manage one actual PCMCIA card. 201*/ 202 203static int dio24_cs_attach(struct pcmcia_device *); 204static void dio24_cs_detach(struct pcmcia_device *); 205 206/* 207 You'll also need to prototype all the functions that will actually 208 be used to talk to your device. See 'memory_cs' for a good example 209 of a fully self-sufficient driver; the other drivers rely more or 210 less on other parts of the kernel. 211*/ 212 213/* 214 The dev_info variable is the "key" that is used to match up this 215 device driver with appropriate cards, through the card configuration 216 database. 217*/ 218 219static const dev_info_t dev_info = "ni_daq_dio24"; 220 221struct local_info_t { 222 struct pcmcia_device *link; 223 int stop; 224 struct bus_operations *bus; 225}; 226 227/*====================================================================== 228 229 dio24_cs_attach() creates an "instance" of the driver, allocating 230 local data structures for one device. The device is registered 231 with Card Services. 232 233 The dev_link structure is initialized, but we don't actually 234 configure the card at this point -- we wait until we receive a 235 card insertion event. 236 237======================================================================*/ 238 239static int dio24_cs_attach(struct pcmcia_device *link) 240{ 241 struct local_info_t *local; 242 243 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n"); 244 245 dev_dbg(&link->dev, "dio24_cs_attach()\n"); 246 247 /* Allocate space for private device-specific data */ 248 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); 249 if (!local) 250 return -ENOMEM; 251 local->link = link; 252 link->priv = local; 253 254 /* 255 General socket configuration defaults can go here. In this 256 client, we assume very little, and rely on the CIS for almost 257 everything. In most clients, many details (i.e., number, sizes, 258 and attributes of IO windows) are fixed by the nature of the 259 device, and can be hard-wired here. 260 */ 261 link->conf.Attributes = 0; 262 link->conf.IntType = INT_MEMORY_AND_IO; 263 264 pcmcia_cur_dev = link; 265 266 dio24_config(link); 267 268 return 0; 269} /* dio24_cs_attach */ 270 271/*====================================================================== 272 273 This deletes a driver "instance". The device is de-registered 274 with Card Services. If it has been released, all local data 275 structures are freed. Otherwise, the structures will be freed 276 when the device is released. 277 278======================================================================*/ 279 280static void dio24_cs_detach(struct pcmcia_device *link) 281{ 282 283 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n"); 284 285 dev_dbg(&link->dev, "dio24_cs_detach\n"); 286 287 ((struct local_info_t *)link->priv)->stop = 1; 288 dio24_release(link); 289 290 /* This points to the parent local_info_t struct */ 291 if (link->priv) 292 kfree(link->priv); 293 294} /* dio24_cs_detach */ 295 296/*====================================================================== 297 298 dio24_config() is scheduled to run after a CARD_INSERTION event 299 is received, to configure the PCMCIA socket, and to make the 300 device available to the system. 301 302======================================================================*/ 303 304static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev, 305 cistpl_cftable_entry_t *cfg, 306 cistpl_cftable_entry_t *dflt, 307 unsigned int vcc, 308 void *priv_data) 309{ 310 win_req_t *req = priv_data; 311 memreq_t map; 312 313 if (cfg->index == 0) 314 return -ENODEV; 315 316 /* Does this card need audio output? */ 317 if (cfg->flags & CISTPL_CFTABLE_AUDIO) { 318 p_dev->conf.Attributes |= CONF_ENABLE_SPKR; 319 p_dev->conf.Status = CCSR_AUDIO_ENA; 320 } 321 322 /* Do we need to allocate an interrupt? */ 323 p_dev->conf.Attributes |= CONF_ENABLE_IRQ; 324 325 /* IO window settings */ 326 p_dev->resource[0]->end = p_dev->resource[1]->end = 0; 327 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { 328 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; 329 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK; 330 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; 331 p_dev->resource[0]->flags |= 332 pcmcia_io_cfg_data_width(io->flags); 333 p_dev->resource[0]->start = io->win[0].base; 334 p_dev->resource[0]->end = io->win[0].len; 335 if (io->nwin > 1) { 336 p_dev->resource[1]->flags = p_dev->resource[0]->flags; 337 p_dev->resource[1]->start = io->win[1].base; 338 p_dev->resource[1]->end = io->win[1].len; 339 } 340 /* This reserves IO space but doesn't actually enable it */ 341 if (pcmcia_request_io(p_dev) != 0) 342 return -ENODEV; 343 } 344 345 if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) { 346 cistpl_mem_t *mem = 347 (cfg->mem.nwin) ? &cfg->mem : &dflt->mem; 348 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM; 349 req->Attributes |= WIN_ENABLE; 350 req->Base = mem->win[0].host_addr; 351 req->Size = mem->win[0].len; 352 if (req->Size < 0x1000) 353 req->Size = 0x1000; 354 req->AccessSpeed = 0; 355 if (pcmcia_request_window(p_dev, req, &p_dev->win)) 356 return -ENODEV; 357 map.Page = 0; 358 map.CardOffset = mem->win[0].card_addr; 359 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map)) 360 return -ENODEV; 361 } 362 /* If we got this far, we're cool! */ 363 return 0; 364} 365 366static void dio24_config(struct pcmcia_device *link) 367{ 368 int ret; 369 win_req_t req; 370 371 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n"); 372 373 dev_dbg(&link->dev, "dio24_config\n"); 374 375 ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, &req); 376 if (ret) { 377 dev_warn(&link->dev, "no configuration found\n"); 378 goto failed; 379 } 380 381 if (!link->irq) 382 goto failed; 383 384 /* 385 This actually configures the PCMCIA socket -- setting up 386 the I/O windows and the interrupt mapping, and putting the 387 card and host interface into "Memory and IO" mode. 388 */ 389 ret = pcmcia_request_configuration(link, &link->conf); 390 if (ret) 391 goto failed; 392 393 /* Finally, report what we've done */ 394 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex); 395 if (link->conf.Attributes & CONF_ENABLE_IRQ) 396 printk(", irq %d", link->irq); 397 if (link->resource[0]) 398 printk(" & %pR", link->resource[0]); 399 if (link->resource[1]) 400 printk(" & %pR", link->resource[1]); 401 if (link->win) 402 printk(", mem 0x%06lx-0x%06lx", req.Base, 403 req.Base + req.Size - 1); 404 printk("\n"); 405 406 return; 407 408failed: 409 printk(KERN_INFO "Fallo"); 410 dio24_release(link); 411 412} /* dio24_config */ 413 414static void dio24_release(struct pcmcia_device *link) 415{ 416 dev_dbg(&link->dev, "dio24_release\n"); 417 418 pcmcia_disable_device(link); 419} /* dio24_release */ 420 421/*====================================================================== 422 423 The card status event handler. Mostly, this schedules other 424 stuff to run after an event is received. 425 426 When a CARD_REMOVAL event is received, we immediately set a 427 private flag to block future accesses to this device. All the 428 functions that actually access the device should check this flag 429 to make sure the card is still present. 430 431======================================================================*/ 432 433static int dio24_cs_suspend(struct pcmcia_device *link) 434{ 435 struct local_info_t *local = link->priv; 436 437 /* Mark the device as stopped, to block IO until later */ 438 local->stop = 1; 439 return 0; 440} /* dio24_cs_suspend */ 441 442static int dio24_cs_resume(struct pcmcia_device *link) 443{ 444 struct local_info_t *local = link->priv; 445 446 local->stop = 0; 447 return 0; 448} /* dio24_cs_resume */ 449 450/*====================================================================*/ 451 452static struct pcmcia_device_id dio24_cs_ids[] = { 453 /* N.B. These IDs should match those in dio24_boards */ 454 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */ 455 PCMCIA_DEVICE_NULL 456}; 457 458MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids); 459MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>"); 460MODULE_DESCRIPTION("Comedi driver for National Instruments " 461 "PCMCIA DAQ-Card DIO-24"); 462MODULE_LICENSE("GPL"); 463 464struct pcmcia_driver dio24_cs_driver = { 465 .probe = dio24_cs_attach, 466 .remove = dio24_cs_detach, 467 .suspend = dio24_cs_suspend, 468 .resume = dio24_cs_resume, 469 .id_table = dio24_cs_ids, 470 .owner = THIS_MODULE, 471 .drv = { 472 .name = dev_info, 473 }, 474}; 475 476static int __init init_dio24_cs(void) 477{ 478 printk("ni_daq_dio24: HOLA SOY YO!\n"); 479 pcmcia_register_driver(&dio24_cs_driver); 480 return 0; 481} 482 483static void __exit exit_dio24_cs(void) 484{ 485 pcmcia_unregister_driver(&dio24_cs_driver); 486} 487 488int __init init_module(void) 489{ 490 int ret; 491 492 ret = init_dio24_cs(); 493 if (ret < 0) 494 return ret; 495 496 return comedi_driver_register(&driver_dio24); 497} 498 499void __exit cleanup_module(void) 500{ 501 exit_dio24_cs(); 502 comedi_driver_unregister(&driver_dio24); 503} 504