das08_cs.c revision 68c3dbff9fc9f25872408d0e95980d41733d48d0
1/* 2 comedi/drivers/das08_cs.c 3 DAS08 driver 4 5 COMEDI - Linux Control and Measurement Device Interface 6 Copyright (C) 2000 David A. Schleef <ds@schleef.org> 7 Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 23***************************************************************** 24 25*/ 26/* 27Driver: das08_cs 28Description: DAS-08 PCMCIA boards 29Author: Warren Jasper, ds, Frank Hess 30Devices: [ComputerBoards] PCM-DAS08 (pcm-das08) 31Status: works 32 33This is the PCMCIA-specific support split off from the 34das08 driver. 35 36Options (for pcm-das08): 37 NONE 38 39Command support does not exist, but could be added for this board. 40*/ 41 42#include "../comedidev.h" 43 44#include <linux/delay.h> 45#include <linux/pci.h> 46 47#include "das08.h" 48 49/* pcmcia includes */ 50#include <pcmcia/cs_types.h> 51#include <pcmcia/cs.h> 52#include <pcmcia/cistpl.h> 53#include <pcmcia/ds.h> 54 55static struct pcmcia_device *cur_dev = NULL; 56 57#define thisboard ((const struct das08_board_struct *)dev->board_ptr) 58 59static int das08_cs_attach(struct comedi_device *dev, struct comedi_devconfig *it); 60 61static struct comedi_driver driver_das08_cs = { 62 .driver_name = "das08_cs", 63 .module = THIS_MODULE, 64 .attach = das08_cs_attach, 65 .detach = das08_common_detach, 66 .board_name = &das08_cs_boards[0].name, 67 .num_names = sizeof(das08_cs_boards) / 68 sizeof(struct das08_board_struct), 69 .offset = sizeof(struct das08_board_struct), 70}; 71 72static int das08_cs_attach(struct comedi_device *dev, struct comedi_devconfig *it) 73{ 74 int ret; 75 unsigned long iobase; 76 struct pcmcia_device *link = cur_dev; /* XXX hack */ 77 78 ret = alloc_private(dev, sizeof(struct das08_private_struct)); 79 if (ret < 0) 80 return ret; 81 82 printk("comedi%d: das08_cs: ", dev->minor); 83 /* deal with a pci board */ 84 85 if (thisboard->bustype == pcmcia) { 86 if (link == NULL) { 87 printk(" no pcmcia cards found\n"); 88 return -EIO; 89 } 90 iobase = link->io.BasePort1; 91 } else { 92 printk(" bug! board does not have PCMCIA bustype\n"); 93 return -EINVAL; 94 } 95 96 printk("\n"); 97 98 return das08_common_attach(dev, iobase); 99} 100 101/*====================================================================== 102 103 The following pcmcia code for the pcm-das08 is adapted from the 104 dummy_cs.c driver of the Linux PCMCIA Card Services package. 105 106 The initial developer of the original code is David A. Hinds 107 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 108 are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 109 110======================================================================*/ 111 112/* 113 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If 114 you do not define PCMCIA_DEBUG at all, all the debug code will be 115 left out. If you compile with PCMCIA_DEBUG=0, the debug code will 116 be present but disabled -- but it can then be enabled for specific 117 modules at load time with a 'pc_debug=#' option to insmod. 118*/ 119 120#ifdef PCMCIA_DEBUG 121static int pc_debug = PCMCIA_DEBUG; 122module_param(pc_debug, int, 0644); 123#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) 124static const char *version = 125 "das08.c pcmcia code (Frank Hess), modified from dummy_cs.c 1.31 2001/08/24 12:13:13 (David Hinds)"; 126#else 127#define DEBUG(n, args...) 128#endif 129 130/*====================================================================*/ 131static void das08_pcmcia_config(struct pcmcia_device *link); 132static void das08_pcmcia_release(struct pcmcia_device *link); 133static int das08_pcmcia_suspend(struct pcmcia_device *p_dev); 134static int das08_pcmcia_resume(struct pcmcia_device *p_dev); 135 136/* 137 The attach() and detach() entry points are used to create and destroy 138 "instances" of the driver, where each instance represents everything 139 needed to manage one actual PCMCIA card. 140*/ 141 142static int das08_pcmcia_attach(struct pcmcia_device *); 143static void das08_pcmcia_detach(struct pcmcia_device *); 144 145/* 146 You'll also need to prototype all the functions that will actually 147 be used to talk to your device. See 'memory_cs' for a good example 148 of a fully self-sufficient driver; the other drivers rely more or 149 less on other parts of the kernel. 150*/ 151 152/* 153 The dev_info variable is the "key" that is used to match up this 154 device driver with appropriate cards, through the card configuration 155 database. 156*/ 157 158static const dev_info_t dev_info = "pcm-das08"; 159 160struct local_info_t { 161 struct pcmcia_device *link; 162 dev_node_t node; 163 int stop; 164 struct bus_operations *bus; 165}; 166 167/*====================================================================== 168 169 das08_pcmcia_attach() creates an "instance" of the driver, allocating 170 local data structures for one device. The device is registered 171 with Card Services. 172 173 The dev_link structure is initialized, but we don't actually 174 configure the card at this point -- we wait until we receive a 175 card insertion event. 176 177======================================================================*/ 178 179static int das08_pcmcia_attach(struct pcmcia_device *link) 180{ 181 struct local_info_t *local; 182 183 DEBUG(0, "das08_pcmcia_attach()\n"); 184 185 /* Allocate space for private device-specific data */ 186 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); 187 if (!local) 188 return -ENOMEM; 189 local->link = link; 190 link->priv = local; 191 192 /* Interrupt setup */ 193 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; 194 link->irq.IRQInfo1 = IRQ_LEVEL_ID; 195 link->irq.Handler = NULL; 196 197 /* 198 General socket configuration defaults can go here. In this 199 client, we assume very little, and rely on the CIS for almost 200 everything. In most clients, many details (i.e., number, sizes, 201 and attributes of IO windows) are fixed by the nature of the 202 device, and can be hard-wired here. 203 */ 204 link->conf.Attributes = 0; 205 link->conf.IntType = INT_MEMORY_AND_IO; 206 207 cur_dev = link; 208 209 das08_pcmcia_config(link); 210 211 return 0; 212} /* das08_pcmcia_attach */ 213 214/*====================================================================== 215 216 This deletes a driver "instance". The device is de-registered 217 with Card Services. If it has been released, all local data 218 structures are freed. Otherwise, the structures will be freed 219 when the device is released. 220 221======================================================================*/ 222 223static void das08_pcmcia_detach(struct pcmcia_device *link) 224{ 225 226 DEBUG(0, "das08_pcmcia_detach(0x%p)\n", link); 227 228 if (link->dev_node) { 229 ((struct local_info_t *) link->priv)->stop = 1; 230 das08_pcmcia_release(link); 231 } 232 233 /* This points to the parent struct local_info_t struct */ 234 if (link->priv) 235 kfree(link->priv); 236 237} /* das08_pcmcia_detach */ 238 239/*====================================================================== 240 241 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event 242 is received, to configure the PCMCIA socket, and to make the 243 device available to the system. 244 245======================================================================*/ 246 247static void das08_pcmcia_config(struct pcmcia_device *link) 248{ 249 struct local_info_t *dev = link->priv; 250 tuple_t tuple; 251 cisparse_t parse; 252 int last_fn, last_ret; 253 u_char buf[64]; 254 cistpl_cftable_entry_t dflt = { 0 }; 255 256 DEBUG(0, "das08_pcmcia_config(0x%p)\n", link); 257 258 /* 259 This reads the card's CONFIG tuple to find its configuration 260 registers. 261 */ 262 tuple.DesiredTuple = CISTPL_CONFIG; 263 tuple.Attributes = 0; 264 tuple.TupleData = buf; 265 tuple.TupleDataMax = sizeof(buf); 266 tuple.TupleOffset = 0; 267 last_fn = GetFirstTuple; 268 269 last_ret = pcmcia_get_first_tuple(link, &tuple); 270 if (last_ret) 271 goto cs_failed; 272 273 last_fn = GetTupleData; 274 275 last_ret = pcmcia_get_tuple_data(link, &tuple); 276 if (last_ret) 277 goto cs_failed; 278 279 last_fn = ParseTuple; 280 281 last_ret = pcmcia_parse_tuple(&tuple, &parse); 282 if (last_ret) 283 goto cs_failed; 284 285 link->conf.ConfigBase = parse.config.base; 286 link->conf.Present = parse.config.rmask[0]; 287 288 /* 289 In this loop, we scan the CIS for configuration table entries, 290 each of which describes a valid card configuration, including 291 voltage, IO window, memory window, and interrupt settings. 292 293 We make no assumptions about the card to be configured: we use 294 just the information available in the CIS. In an ideal world, 295 this would work for any PCMCIA card, but it requires a complete 296 and accurate CIS. In practice, a driver usually "knows" most of 297 these things without consulting the CIS, and most client drivers 298 will only use the CIS to fill in implementation-defined details. 299 */ 300 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; 301 last_fn = GetFirstTuple; 302 303 last_ret = pcmcia_get_first_tuple(link, &tuple); 304 if (last_ret) 305 goto cs_failed; 306 307 while (1) { 308 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); 309 310 last_ret = pcmcia_get_tuple_data(link, &tuple); 311 if (last_ret) 312 goto next_entry; 313 314 last_ret = pcmcia_parse_tuple(&tuple, &parse); 315 if (last_ret) 316 goto next_entry; 317 318 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) 319 dflt = *cfg; 320 if (cfg->index == 0) 321 goto next_entry; 322 link->conf.ConfigIndex = cfg->index; 323 324 /* Does this card need audio output? */ 325/* if (cfg->flags & CISTPL_CFTABLE_AUDIO) { 326 link->conf.Attributes |= CONF_ENABLE_SPKR; 327 link->conf.Status = CCSR_AUDIO_ENA; 328 } 329*/ 330 /* Do we need to allocate an interrupt? */ 331 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1) 332 link->conf.Attributes |= CONF_ENABLE_IRQ; 333 334 /* IO window settings */ 335 link->io.NumPorts1 = link->io.NumPorts2 = 0; 336 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { 337 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; 338 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; 339 if (!(io->flags & CISTPL_IO_8BIT)) 340 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; 341 if (!(io->flags & CISTPL_IO_16BIT)) 342 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; 343 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; 344 link->io.BasePort1 = io->win[0].base; 345 link->io.NumPorts1 = io->win[0].len; 346 if (io->nwin > 1) { 347 link->io.Attributes2 = link->io.Attributes1; 348 link->io.BasePort2 = io->win[1].base; 349 link->io.NumPorts2 = io->win[1].len; 350 } 351 /* This reserves IO space but doesn't actually enable it */ 352 if (pcmcia_request_io(link, &link->io) != 0) 353 goto next_entry; 354 } 355 356 /* If we got this far, we're cool! */ 357 break; 358 359 next_entry: 360 last_fn = GetNextTuple; 361 362 last_ret = pcmcia_get_next_tuple(link, &tuple); 363 if (last_ret) 364 goto cs_failed; 365 } 366 367 if (link->conf.Attributes & CONF_ENABLE_IRQ) { 368 last_fn = RequestIRQ; 369 last_ret = pcmcia_request_irq(link, &link->irq); 370 if (last_ret) 371 goto cs_failed; 372 } 373 374 /* 375 This actually configures the PCMCIA socket -- setting up 376 the I/O windows and the interrupt mapping, and putting the 377 card and host interface into "Memory and IO" mode. 378 */ 379 last_fn = RequestConfiguration; 380 last_ret = pcmcia_request_configuration(link, &link->conf); 381 if (last_ret) 382 goto cs_failed; 383 384 /* 385 At this point, the dev_node_t structure(s) need to be 386 initialized and arranged in a linked list at link->dev. 387 */ 388 sprintf(dev->node.dev_name, "pcm-das08"); 389 dev->node.major = dev->node.minor = 0; 390 link->dev_node = &dev->node; 391 392 /* Finally, report what we've done */ 393 printk(KERN_INFO "%s: index 0x%02x", 394 dev->node.dev_name, link->conf.ConfigIndex); 395 if (link->conf.Attributes & CONF_ENABLE_IRQ) 396 printk(", irq %u", link->irq.AssignedIRQ); 397 if (link->io.NumPorts1) 398 printk(", io 0x%04x-0x%04x", link->io.BasePort1, 399 link->io.BasePort1 + link->io.NumPorts1 - 1); 400 if (link->io.NumPorts2) 401 printk(" & 0x%04x-0x%04x", link->io.BasePort2, 402 link->io.BasePort2 + link->io.NumPorts2 - 1); 403 printk("\n"); 404 405 return; 406 407 cs_failed: 408 cs_error(link, last_fn, last_ret); 409 das08_pcmcia_release(link); 410 411} /* das08_pcmcia_config */ 412 413/*====================================================================== 414 415 After a card is removed, das08_pcmcia_release() will unregister the 416 device, and release the PCMCIA configuration. If the device is 417 still open, this will be postponed until it is closed. 418 419======================================================================*/ 420 421static void das08_pcmcia_release(struct pcmcia_device *link) 422{ 423 DEBUG(0, "das08_pcmcia_release(0x%p)\n", link); 424 pcmcia_disable_device(link); 425} /* das08_pcmcia_release */ 426 427/*====================================================================== 428 429 The card status event handler. Mostly, this schedules other 430 stuff to run after an event is received. 431 432 When a CARD_REMOVAL event is received, we immediately set a 433 private flag to block future accesses to this device. All the 434 functions that actually access the device should check this flag 435 to make sure the card is still present. 436 437======================================================================*/ 438 439static int das08_pcmcia_suspend(struct pcmcia_device *link) 440{ 441 struct local_info_t *local = link->priv; 442 /* Mark the device as stopped, to block IO until later */ 443 local->stop = 1; 444 445 return 0; 446} /* das08_pcmcia_suspend */ 447 448static int das08_pcmcia_resume(struct pcmcia_device *link) 449{ 450 struct local_info_t *local = link->priv; 451 452 local->stop = 0; 453 return 0; 454} /* das08_pcmcia_resume */ 455 456/*====================================================================*/ 457 458static struct pcmcia_device_id das08_cs_id_table[] = { 459 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001), 460 PCMCIA_DEVICE_NULL 461}; 462 463MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table); 464 465struct pcmcia_driver das08_cs_driver = { 466 .probe = das08_pcmcia_attach, 467 .remove = das08_pcmcia_detach, 468 .suspend = das08_pcmcia_suspend, 469 .resume = das08_pcmcia_resume, 470 .id_table = das08_cs_id_table, 471 .owner = THIS_MODULE, 472 .drv = { 473 .name = dev_info, 474 }, 475}; 476 477static int __init init_das08_pcmcia_cs(void) 478{ 479 DEBUG(0, "%s\n", version); 480 pcmcia_register_driver(&das08_cs_driver); 481 return 0; 482} 483 484static void __exit exit_das08_pcmcia_cs(void) 485{ 486 DEBUG(0, "das08_pcmcia_cs: unloading\n"); 487 pcmcia_unregister_driver(&das08_cs_driver); 488} 489 490static int __init das08_cs_init_module(void) 491{ 492 int ret; 493 494 ret = init_das08_pcmcia_cs(); 495 if (ret < 0) 496 return ret; 497 498 return comedi_driver_register(&driver_das08_cs); 499} 500 501static void __exit das08_cs_exit_module(void) 502{ 503 exit_das08_pcmcia_cs(); 504 comedi_driver_unregister(&driver_das08_cs); 505} 506 507MODULE_LICENSE("GPL"); 508module_init(das08_cs_init_module); 509module_exit(das08_cs_exit_module); 510