ni_daq_dio24.c revision 5fa9167a1bf5f5a4b7282f5e7ac56a4a5a1fa044
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 "../comedidev.h" 45 46#include <linux/ioport.h> 47 48#include "8255.h" 49 50#include <pcmcia/cs_types.h> 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->io.BasePort1; 132#ifdef incomplete 133 irq = link->irq.AssignedIRQ; 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 dev_node_t node; 224 int stop; 225 struct bus_operations *bus; 226}; 227 228/*====================================================================== 229 230 dio24_cs_attach() creates an "instance" of the driver, allocating 231 local data structures for one device. The device is registered 232 with Card Services. 233 234 The dev_link structure is initialized, but we don't actually 235 configure the card at this point -- we wait until we receive a 236 card insertion event. 237 238======================================================================*/ 239 240static int dio24_cs_attach(struct pcmcia_device *link) 241{ 242 struct local_info_t *local; 243 244 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n"); 245 246 dev_dbg(&link->dev, "dio24_cs_attach()\n"); 247 248 /* Allocate space for private device-specific data */ 249 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); 250 if (!local) 251 return -ENOMEM; 252 local->link = link; 253 link->priv = local; 254 255 /* Interrupt setup */ 256 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING; 257 link->irq.Handler = NULL; 258 259 /* 260 General socket configuration defaults can go here. In this 261 client, we assume very little, and rely on the CIS for almost 262 everything. In most clients, many details (i.e., number, sizes, 263 and attributes of IO windows) are fixed by the nature of the 264 device, and can be hard-wired here. 265 */ 266 link->conf.Attributes = 0; 267 link->conf.IntType = INT_MEMORY_AND_IO; 268 269 pcmcia_cur_dev = link; 270 271 dio24_config(link); 272 273 return 0; 274} /* dio24_cs_attach */ 275 276/*====================================================================== 277 278 This deletes a driver "instance". The device is de-registered 279 with Card Services. If it has been released, all local data 280 structures are freed. Otherwise, the structures will be freed 281 when the device is released. 282 283======================================================================*/ 284 285static void dio24_cs_detach(struct pcmcia_device *link) 286{ 287 288 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n"); 289 290 dev_dbg(&link->dev, "dio24_cs_detach\n"); 291 292 if (link->dev_node) { 293 ((struct local_info_t *)link->priv)->stop = 1; 294 dio24_release(link); 295 } 296 297 /* This points to the parent local_info_t struct */ 298 if (link->priv) 299 kfree(link->priv); 300 301} /* dio24_cs_detach */ 302 303/*====================================================================== 304 305 dio24_config() is scheduled to run after a CARD_INSERTION event 306 is received, to configure the PCMCIA socket, and to make the 307 device available to the system. 308 309======================================================================*/ 310 311static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev, 312 cistpl_cftable_entry_t *cfg, 313 cistpl_cftable_entry_t *dflt, 314 unsigned int vcc, 315 void *priv_data) 316{ 317 win_req_t *req = priv_data; 318 memreq_t map; 319 320 if (cfg->index == 0) 321 return -ENODEV; 322 323 /* Does this card need audio output? */ 324 if (cfg->flags & CISTPL_CFTABLE_AUDIO) { 325 p_dev->conf.Attributes |= CONF_ENABLE_SPKR; 326 p_dev->conf.Status = CCSR_AUDIO_ENA; 327 } 328 329 /* Do we need to allocate an interrupt? */ 330 if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1) 331 p_dev->conf.Attributes |= CONF_ENABLE_IRQ; 332 333 /* IO window settings */ 334 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0; 335 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { 336 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; 337 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; 338 if (!(io->flags & CISTPL_IO_8BIT)) 339 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16; 340 if (!(io->flags & CISTPL_IO_16BIT)) 341 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; 342 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; 343 p_dev->io.BasePort1 = io->win[0].base; 344 p_dev->io.NumPorts1 = io->win[0].len; 345 if (io->nwin > 1) { 346 p_dev->io.Attributes2 = p_dev->io.Attributes1; 347 p_dev->io.BasePort2 = io->win[1].base; 348 p_dev->io.NumPorts2 = io->win[1].len; 349 } 350 /* This reserves IO space but doesn't actually enable it */ 351 if (pcmcia_request_io(p_dev, &p_dev->io) != 0) 352 return -ENODEV; 353 } 354 355 if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) { 356 cistpl_mem_t *mem = 357 (cfg->mem.nwin) ? &cfg->mem : &dflt->mem; 358 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM; 359 req->Attributes |= WIN_ENABLE; 360 req->Base = mem->win[0].host_addr; 361 req->Size = mem->win[0].len; 362 if (req->Size < 0x1000) 363 req->Size = 0x1000; 364 req->AccessSpeed = 0; 365 if (pcmcia_request_window(p_dev, req, &p_dev->win)) 366 return -ENODEV; 367 map.Page = 0; 368 map.CardOffset = mem->win[0].card_addr; 369 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map)) 370 return -ENODEV; 371 } 372 /* If we got this far, we're cool! */ 373 return 0; 374} 375 376static void dio24_config(struct pcmcia_device *link) 377{ 378 struct local_info_t *dev = link->priv; 379 int ret; 380 win_req_t req; 381 382 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n"); 383 384 dev_dbg(&link->dev, "dio24_config\n"); 385 386 ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, &req); 387 if (ret) { 388 dev_warn(&link->dev, "no configuration found\n"); 389 goto failed; 390 } 391 392 /* 393 Allocate an interrupt line. Note that this does not assign a 394 handler to the interrupt, unless the 'Handler' member of the 395 irq structure is initialized. 396 */ 397 if (link->conf.Attributes & CONF_ENABLE_IRQ) { 398 ret = pcmcia_request_irq(link, &link->irq); 399 if (ret) 400 goto failed; 401 } 402 403 /* 404 This actually configures the PCMCIA socket -- setting up 405 the I/O windows and the interrupt mapping, and putting the 406 card and host interface into "Memory and IO" mode. 407 */ 408 ret = pcmcia_request_configuration(link, &link->conf); 409 if (ret) 410 goto failed; 411 412 /* 413 At this point, the dev_node_t structure(s) need to be 414 initialized and arranged in a linked list at link->dev. 415 */ 416 sprintf(dev->node.dev_name, "ni_daq_dio24"); 417 dev->node.major = dev->node.minor = 0; 418 link->dev_node = &dev->node; 419 420 /* Finally, report what we've done */ 421 printk(KERN_INFO "%s: index 0x%02x", 422 dev->node.dev_name, link->conf.ConfigIndex); 423 if (link->conf.Attributes & CONF_ENABLE_IRQ) 424 printk(", irq %d", link->irq.AssignedIRQ); 425 if (link->io.NumPorts1) 426 printk(", io 0x%04x-0x%04x", link->io.BasePort1, 427 link->io.BasePort1 + link->io.NumPorts1 - 1); 428 if (link->io.NumPorts2) 429 printk(" & 0x%04x-0x%04x", link->io.BasePort2, 430 link->io.BasePort2 + link->io.NumPorts2 - 1); 431 if (link->win) 432 printk(", mem 0x%06lx-0x%06lx", req.Base, 433 req.Base + req.Size - 1); 434 printk("\n"); 435 436 return; 437 438failed: 439 printk(KERN_INFO "Fallo"); 440 dio24_release(link); 441 442} /* dio24_config */ 443 444static void dio24_release(struct pcmcia_device *link) 445{ 446 dev_dbg(&link->dev, "dio24_release\n"); 447 448 pcmcia_disable_device(link); 449} /* dio24_release */ 450 451/*====================================================================== 452 453 The card status event handler. Mostly, this schedules other 454 stuff to run after an event is received. 455 456 When a CARD_REMOVAL event is received, we immediately set a 457 private flag to block future accesses to this device. All the 458 functions that actually access the device should check this flag 459 to make sure the card is still present. 460 461======================================================================*/ 462 463static int dio24_cs_suspend(struct pcmcia_device *link) 464{ 465 struct local_info_t *local = link->priv; 466 467 /* Mark the device as stopped, to block IO until later */ 468 local->stop = 1; 469 return 0; 470} /* dio24_cs_suspend */ 471 472static int dio24_cs_resume(struct pcmcia_device *link) 473{ 474 struct local_info_t *local = link->priv; 475 476 local->stop = 0; 477 return 0; 478} /* dio24_cs_resume */ 479 480/*====================================================================*/ 481 482static struct pcmcia_device_id dio24_cs_ids[] = { 483 /* N.B. These IDs should match those in dio24_boards */ 484 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */ 485 PCMCIA_DEVICE_NULL 486}; 487 488MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids); 489 490struct pcmcia_driver dio24_cs_driver = { 491 .probe = dio24_cs_attach, 492 .remove = dio24_cs_detach, 493 .suspend = dio24_cs_suspend, 494 .resume = dio24_cs_resume, 495 .id_table = dio24_cs_ids, 496 .owner = THIS_MODULE, 497 .drv = { 498 .name = dev_info, 499 }, 500}; 501 502static int __init init_dio24_cs(void) 503{ 504 printk("ni_daq_dio24: HOLA SOY YO!\n"); 505 pcmcia_register_driver(&dio24_cs_driver); 506 return 0; 507} 508 509static void __exit exit_dio24_cs(void) 510{ 511 pcmcia_unregister_driver(&dio24_cs_driver); 512} 513 514int __init init_module(void) 515{ 516 int ret; 517 518 ret = init_dio24_cs(); 519 if (ret < 0) 520 return ret; 521 522 return comedi_driver_register(&driver_dio24); 523} 524 525void __exit cleanup_module(void) 526{ 527 exit_dio24_cs(); 528 comedi_driver_unregister(&driver_dio24); 529} 530