1/* 2 * PCMCIA 16-bit resource management functions 3 * 4 * The initial developer of the original code is David A. Hinds 5 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 6 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 7 * 8 * Copyright (C) 1999 David A. Hinds 9 * Copyright (C) 2004-2005 Dominik Brodowski 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 * 15 */ 16 17#include <linux/module.h> 18#include <linux/kernel.h> 19#include <linux/interrupt.h> 20#include <linux/delay.h> 21#include <linux/pci.h> 22#include <linux/device.h> 23#include <linux/netdevice.h> 24#include <linux/slab.h> 25 26#include <asm/irq.h> 27 28#include <pcmcia/ss.h> 29#include <pcmcia/cs.h> 30#include <pcmcia/cistpl.h> 31#include <pcmcia/cisreg.h> 32#include <pcmcia/ds.h> 33 34#include "cs_internal.h" 35 36 37/* Access speed for IO windows */ 38static int io_speed; 39module_param(io_speed, int, 0444); 40 41 42int pcmcia_validate_mem(struct pcmcia_socket *s) 43{ 44 if (s->resource_ops->validate_mem) 45 return s->resource_ops->validate_mem(s); 46 /* if there is no callback, we can assume that everything is OK */ 47 return 0; 48} 49 50struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align, 51 int low, struct pcmcia_socket *s) 52{ 53 if (s->resource_ops->find_mem) 54 return s->resource_ops->find_mem(base, num, align, low, s); 55 return NULL; 56} 57 58 59static void release_io_space(struct pcmcia_socket *s, struct resource *res) 60{ 61 resource_size_t num = resource_size(res); 62 int i; 63 64 dev_dbg(&s->dev, "release_io_space for %pR\n", res); 65 66 for (i = 0; i < MAX_IO_WIN; i++) { 67 if (!s->io[i].res) 68 continue; 69 if ((s->io[i].res->start <= res->start) && 70 (s->io[i].res->end >= res->end)) { 71 s->io[i].InUse -= num; 72 if (res->parent) 73 release_resource(res); 74 res->start = res->end = 0; 75 res->flags = IORESOURCE_IO; 76 /* Free the window if no one else is using it */ 77 if (s->io[i].InUse == 0) { 78 release_resource(s->io[i].res); 79 kfree(s->io[i].res); 80 s->io[i].res = NULL; 81 } 82 } 83 } 84} /* release_io_space */ 85 86/** alloc_io_space 87 * 88 * Special stuff for managing IO windows, because they are scarce 89 */ 90static int alloc_io_space(struct pcmcia_socket *s, struct resource *res, 91 unsigned int lines) 92{ 93 unsigned int align; 94 unsigned int base = res->start; 95 unsigned int num = res->end; 96 int ret; 97 98 res->flags |= IORESOURCE_IO; 99 100 dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n", 101 res, lines); 102 103 align = base ? (lines ? 1<<lines : 0) : 1; 104 if (align && (align < num)) { 105 if (base) { 106 dev_dbg(&s->dev, "odd IO request\n"); 107 align = 0; 108 } else 109 while (align && (align < num)) 110 align <<= 1; 111 } 112 if (base & ~(align-1)) { 113 dev_dbg(&s->dev, "odd IO request\n"); 114 align = 0; 115 } 116 117 ret = s->resource_ops->find_io(s, res->flags, &base, num, align, 118 &res->parent); 119 if (ret) { 120 dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret); 121 return -EINVAL; 122 } 123 124 res->start = base; 125 res->end = res->start + num - 1; 126 127 if (res->parent) { 128 ret = request_resource(res->parent, res); 129 if (ret) { 130 dev_warn(&s->dev, 131 "request_resource %pR failed: %d\n", res, ret); 132 res->parent = NULL; 133 release_io_space(s, res); 134 } 135 } 136 dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res); 137 return ret; 138} /* alloc_io_space */ 139 140 141/** 142 * pcmcia_access_config() - read or write card configuration registers 143 * 144 * pcmcia_access_config() reads and writes configuration registers in 145 * attribute memory. Memory window 0 is reserved for this and the tuple 146 * reading services. Drivers must use pcmcia_read_config_byte() or 147 * pcmcia_write_config_byte(). 148 */ 149static int pcmcia_access_config(struct pcmcia_device *p_dev, 150 off_t where, u8 *val, 151 int (*accessf) (struct pcmcia_socket *s, 152 int attr, unsigned int addr, 153 unsigned int len, void *ptr)) 154{ 155 struct pcmcia_socket *s; 156 config_t *c; 157 int addr; 158 int ret = 0; 159 160 s = p_dev->socket; 161 162 mutex_lock(&s->ops_mutex); 163 c = p_dev->function_config; 164 165 if (!(c->state & CONFIG_LOCKED)) { 166 dev_dbg(&p_dev->dev, "Configuration isnt't locked\n"); 167 mutex_unlock(&s->ops_mutex); 168 return -EACCES; 169 } 170 171 addr = (c->ConfigBase + where) >> 1; 172 173 ret = accessf(s, 1, addr, 1, val); 174 175 mutex_unlock(&s->ops_mutex); 176 177 return ret; 178} /* pcmcia_access_config */ 179 180 181/** 182 * pcmcia_read_config_byte() - read a byte from a card configuration register 183 * 184 * pcmcia_read_config_byte() reads a byte from a configuration register in 185 * attribute memory. 186 */ 187int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val) 188{ 189 return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem); 190} 191EXPORT_SYMBOL(pcmcia_read_config_byte); 192 193 194/** 195 * pcmcia_write_config_byte() - write a byte to a card configuration register 196 * 197 * pcmcia_write_config_byte() writes a byte to a configuration register in 198 * attribute memory. 199 */ 200int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val) 201{ 202 return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem); 203} 204EXPORT_SYMBOL(pcmcia_write_config_byte); 205 206 207int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh, 208 unsigned int offset) 209{ 210 struct pcmcia_socket *s = p_dev->socket; 211 struct resource *res = wh; 212 unsigned int w; 213 int ret; 214 215 w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1; 216 if (w >= MAX_WIN) 217 return -EINVAL; 218 219 mutex_lock(&s->ops_mutex); 220 s->win[w].card_start = offset; 221 ret = s->ops->set_mem_map(s, &s->win[w]); 222 if (ret) 223 dev_warn(&p_dev->dev, "failed to set_mem_map\n"); 224 mutex_unlock(&s->ops_mutex); 225 return ret; 226} /* pcmcia_map_mem_page */ 227EXPORT_SYMBOL(pcmcia_map_mem_page); 228 229 230/** pcmcia_modify_configuration 231 * 232 * Modify a locked socket configuration 233 */ 234int pcmcia_modify_configuration(struct pcmcia_device *p_dev, 235 modconf_t *mod) 236{ 237 struct pcmcia_socket *s; 238 config_t *c; 239 int ret; 240 241 s = p_dev->socket; 242 243 mutex_lock(&s->ops_mutex); 244 c = p_dev->function_config; 245 246 if (!(s->state & SOCKET_PRESENT)) { 247 dev_dbg(&p_dev->dev, "No card present\n"); 248 ret = -ENODEV; 249 goto unlock; 250 } 251 if (!(c->state & CONFIG_LOCKED)) { 252 dev_dbg(&p_dev->dev, "Configuration isnt't locked\n"); 253 ret = -EACCES; 254 goto unlock; 255 } 256 257 if (mod->Attributes & (CONF_IRQ_CHANGE_VALID | CONF_VCC_CHANGE_VALID)) { 258 dev_dbg(&p_dev->dev, 259 "changing Vcc or IRQ is not allowed at this time\n"); 260 ret = -EINVAL; 261 goto unlock; 262 } 263 264 /* We only allow changing Vpp1 and Vpp2 to the same value */ 265 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) && 266 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { 267 if (mod->Vpp1 != mod->Vpp2) { 268 dev_dbg(&p_dev->dev, 269 "Vpp1 and Vpp2 must be the same\n"); 270 ret = -EINVAL; 271 goto unlock; 272 } 273 s->socket.Vpp = mod->Vpp1; 274 if (s->ops->set_socket(s, &s->socket)) { 275 dev_printk(KERN_WARNING, &p_dev->dev, 276 "Unable to set VPP\n"); 277 ret = -EIO; 278 goto unlock; 279 } 280 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) || 281 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { 282 dev_dbg(&p_dev->dev, 283 "changing Vcc is not allowed at this time\n"); 284 ret = -EINVAL; 285 goto unlock; 286 } 287 288 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) { 289 pccard_io_map io_off = { 0, 0, 0, 0, 1 }; 290 pccard_io_map io_on; 291 int i; 292 293 io_on.speed = io_speed; 294 for (i = 0; i < MAX_IO_WIN; i++) { 295 if (!s->io[i].res) 296 continue; 297 io_off.map = i; 298 io_on.map = i; 299 300 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8; 301 io_on.start = s->io[i].res->start; 302 io_on.stop = s->io[i].res->end; 303 304 s->ops->set_io_map(s, &io_off); 305 mdelay(40); 306 s->ops->set_io_map(s, &io_on); 307 } 308 } 309 ret = 0; 310unlock: 311 mutex_unlock(&s->ops_mutex); 312 313 return ret; 314} /* modify_configuration */ 315EXPORT_SYMBOL(pcmcia_modify_configuration); 316 317 318int pcmcia_release_configuration(struct pcmcia_device *p_dev) 319{ 320 pccard_io_map io = { 0, 0, 0, 0, 1 }; 321 struct pcmcia_socket *s = p_dev->socket; 322 config_t *c; 323 int i; 324 325 mutex_lock(&s->ops_mutex); 326 c = p_dev->function_config; 327 if (p_dev->_locked) { 328 p_dev->_locked = 0; 329 if (--(s->lock_count) == 0) { 330 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */ 331 s->socket.Vpp = 0; 332 s->socket.io_irq = 0; 333 s->ops->set_socket(s, &s->socket); 334 } 335 } 336 if (c->state & CONFIG_LOCKED) { 337 c->state &= ~CONFIG_LOCKED; 338 if (c->state & CONFIG_IO_REQ) 339 for (i = 0; i < MAX_IO_WIN; i++) { 340 if (!s->io[i].res) 341 continue; 342 s->io[i].Config--; 343 if (s->io[i].Config != 0) 344 continue; 345 io.map = i; 346 s->ops->set_io_map(s, &io); 347 } 348 } 349 mutex_unlock(&s->ops_mutex); 350 351 return 0; 352} /* pcmcia_release_configuration */ 353 354 355/** pcmcia_release_io 356 * 357 * Release_io() releases the I/O ranges allocated by a client. This 358 * may be invoked some time after a card ejection has already dumped 359 * the actual socket configuration, so if the client is "stale", we 360 * don't bother checking the port ranges against the current socket 361 * values. 362 */ 363static int pcmcia_release_io(struct pcmcia_device *p_dev) 364{ 365 struct pcmcia_socket *s = p_dev->socket; 366 int ret = -EINVAL; 367 config_t *c; 368 369 mutex_lock(&s->ops_mutex); 370 if (!p_dev->_io) 371 goto out; 372 373 c = p_dev->function_config; 374 375 release_io_space(s, &c->io[0]); 376 377 if (c->io[1].end) 378 release_io_space(s, &c->io[1]); 379 380 p_dev->_io = 0; 381 c->state &= ~CONFIG_IO_REQ; 382 383out: 384 mutex_unlock(&s->ops_mutex); 385 386 return ret; 387} /* pcmcia_release_io */ 388 389 390int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res) 391{ 392 struct pcmcia_socket *s = p_dev->socket; 393 pccard_mem_map *win; 394 unsigned int w; 395 396 dev_dbg(&p_dev->dev, "releasing window %pR\n", res); 397 398 w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1; 399 if (w >= MAX_WIN) 400 return -EINVAL; 401 402 mutex_lock(&s->ops_mutex); 403 win = &s->win[w]; 404 405 if (!(p_dev->_win & CLIENT_WIN_REQ(w))) { 406 dev_dbg(&p_dev->dev, "not releasing unknown window\n"); 407 mutex_unlock(&s->ops_mutex); 408 return -EINVAL; 409 } 410 411 /* Shut down memory window */ 412 win->flags &= ~MAP_ACTIVE; 413 s->ops->set_mem_map(s, win); 414 s->state &= ~SOCKET_WIN_REQ(w); 415 416 /* Release system memory */ 417 if (win->res) { 418 release_resource(res); 419 release_resource(win->res); 420 kfree(win->res); 421 win->res = NULL; 422 } 423 p_dev->_win &= ~CLIENT_WIN_REQ(w); 424 mutex_unlock(&s->ops_mutex); 425 426 return 0; 427} /* pcmcia_release_window */ 428EXPORT_SYMBOL(pcmcia_release_window); 429 430 431int pcmcia_request_configuration(struct pcmcia_device *p_dev, 432 config_req_t *req) 433{ 434 int i; 435 u_int base; 436 struct pcmcia_socket *s = p_dev->socket; 437 config_t *c; 438 pccard_io_map iomap; 439 440 if (!(s->state & SOCKET_PRESENT)) 441 return -ENODEV; 442 443 if (req->IntType & INT_CARDBUS) { 444 dev_dbg(&p_dev->dev, "IntType may not be INT_CARDBUS\n"); 445 return -EINVAL; 446 } 447 448 mutex_lock(&s->ops_mutex); 449 c = p_dev->function_config; 450 if (c->state & CONFIG_LOCKED) { 451 mutex_unlock(&s->ops_mutex); 452 dev_dbg(&p_dev->dev, "Configuration is locked\n"); 453 return -EACCES; 454 } 455 456 /* Do power control. We don't allow changes in Vcc. */ 457 s->socket.Vpp = req->Vpp; 458 if (s->ops->set_socket(s, &s->socket)) { 459 mutex_unlock(&s->ops_mutex); 460 dev_printk(KERN_WARNING, &p_dev->dev, 461 "Unable to set socket state\n"); 462 return -EINVAL; 463 } 464 465 /* Pick memory or I/O card, DMA mode, interrupt */ 466 c->IntType = req->IntType; 467 c->Attributes = req->Attributes; 468 if (req->IntType & INT_MEMORY_AND_IO) 469 s->socket.flags |= SS_IOCARD; 470 if (req->IntType & INT_ZOOMED_VIDEO) 471 s->socket.flags |= SS_ZVCARD | SS_IOCARD; 472 if (req->Attributes & CONF_ENABLE_DMA) 473 s->socket.flags |= SS_DMA_MODE; 474 if (req->Attributes & CONF_ENABLE_SPKR) 475 s->socket.flags |= SS_SPKR_ENA; 476 if (req->Attributes & CONF_ENABLE_IRQ) 477 s->socket.io_irq = s->pcmcia_irq; 478 else 479 s->socket.io_irq = 0; 480 s->ops->set_socket(s, &s->socket); 481 s->lock_count++; 482 483 /* Set up CIS configuration registers */ 484 base = c->ConfigBase = req->ConfigBase; 485 c->CardValues = req->Present; 486 if (req->Present & PRESENT_COPY) { 487 c->Copy = req->Copy; 488 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy); 489 } 490 if (req->Present & PRESENT_OPTION) { 491 if (s->functions == 1) { 492 c->Option = req->ConfigIndex & COR_CONFIG_MASK; 493 } else { 494 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK; 495 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA; 496 if (req->Present & PRESENT_IOBASE_0) 497 c->Option |= COR_ADDR_DECODE; 498 } 499 if ((req->Attributes & CONF_ENABLE_IRQ) && 500 !(req->Attributes & CONF_ENABLE_PULSE_IRQ)) 501 c->Option |= COR_LEVEL_REQ; 502 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option); 503 mdelay(40); 504 } 505 if (req->Present & PRESENT_STATUS) { 506 c->Status = req->Status; 507 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status); 508 } 509 if (req->Present & PRESENT_PIN_REPLACE) { 510 c->Pin = req->Pin; 511 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin); 512 } 513 if (req->Present & PRESENT_EXT_STATUS) { 514 c->ExtStatus = req->ExtStatus; 515 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus); 516 } 517 if (req->Present & PRESENT_IOBASE_0) { 518 u8 b = c->io[0].start & 0xff; 519 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b); 520 b = (c->io[0].start >> 8) & 0xff; 521 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b); 522 } 523 if (req->Present & PRESENT_IOSIZE) { 524 u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1; 525 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b); 526 } 527 528 /* Configure I/O windows */ 529 if (c->state & CONFIG_IO_REQ) { 530 iomap.speed = io_speed; 531 for (i = 0; i < MAX_IO_WIN; i++) 532 if (s->io[i].res) { 533 iomap.map = i; 534 iomap.flags = MAP_ACTIVE; 535 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) { 536 case IO_DATA_PATH_WIDTH_16: 537 iomap.flags |= MAP_16BIT; break; 538 case IO_DATA_PATH_WIDTH_AUTO: 539 iomap.flags |= MAP_AUTOSZ; break; 540 default: 541 break; 542 } 543 iomap.start = s->io[i].res->start; 544 iomap.stop = s->io[i].res->end; 545 s->ops->set_io_map(s, &iomap); 546 s->io[i].Config++; 547 } 548 } 549 550 c->state |= CONFIG_LOCKED; 551 p_dev->_locked = 1; 552 mutex_unlock(&s->ops_mutex); 553 return 0; 554} /* pcmcia_request_configuration */ 555EXPORT_SYMBOL(pcmcia_request_configuration); 556 557 558/** 559 * pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices 560 * 561 * pcmcia_request_io() attepts to reserve the IO port ranges specified in 562 * &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The 563 * "start" value is the requested start of the IO port resource; "end" 564 * reflects the number of ports requested. The number of IO lines requested 565 * is specified in &struct pcmcia_device @p_dev->io_lines. 566 */ 567int pcmcia_request_io(struct pcmcia_device *p_dev) 568{ 569 struct pcmcia_socket *s = p_dev->socket; 570 config_t *c = p_dev->function_config; 571 int ret = -EINVAL; 572 573 mutex_lock(&s->ops_mutex); 574 dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR", 575 &c->io[0], &c->io[1]); 576 577 if (!(s->state & SOCKET_PRESENT)) { 578 dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n"); 579 goto out; 580 } 581 582 if (c->state & CONFIG_LOCKED) { 583 dev_dbg(&p_dev->dev, "Configuration is locked\n"); 584 goto out; 585 } 586 if (c->state & CONFIG_IO_REQ) { 587 dev_dbg(&p_dev->dev, "IO already configured\n"); 588 goto out; 589 } 590 591 ret = alloc_io_space(s, &c->io[0], p_dev->io_lines); 592 if (ret) 593 goto out; 594 595 if (c->io[1].end) { 596 ret = alloc_io_space(s, &c->io[1], p_dev->io_lines); 597 if (ret) { 598 struct resource tmp = c->io[0]; 599 /* release the previously allocated resource */ 600 release_io_space(s, &c->io[0]); 601 /* but preserve the settings, for they worked... */ 602 c->io[0].end = resource_size(&tmp); 603 c->io[0].start = tmp.start; 604 c->io[0].flags = tmp.flags; 605 goto out; 606 } 607 } else 608 c->io[1].start = 0; 609 610 c->state |= CONFIG_IO_REQ; 611 p_dev->_io = 1; 612 613 dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR", 614 &c->io[0], &c->io[1]); 615out: 616 mutex_unlock(&s->ops_mutex); 617 618 return ret; 619} /* pcmcia_request_io */ 620EXPORT_SYMBOL(pcmcia_request_io); 621 622 623/** 624 * pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device 625 * 626 * pcmcia_request_irq() is a wrapper around request_irq which will allow 627 * the PCMCIA core to clean up the registration in pcmcia_disable_device(). 628 * Drivers are free to use request_irq() directly, but then they need to 629 * call free_irq themselfves, too. Also, only IRQF_SHARED capable IRQ 630 * handlers are allowed. 631 */ 632int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev, 633 irq_handler_t handler) 634{ 635 int ret; 636 637 if (!p_dev->irq) 638 return -EINVAL; 639 640 ret = request_irq(p_dev->irq, handler, IRQF_SHARED, 641 p_dev->devname, p_dev->priv); 642 if (!ret) 643 p_dev->_irq = 1; 644 645 return ret; 646} 647EXPORT_SYMBOL(pcmcia_request_irq); 648 649 650/** 651 * pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first 652 * 653 * pcmcia_request_exclusive_irq() is a wrapper around request_irq which 654 * attempts first to request an exclusive IRQ. If it fails, it also accepts 655 * a shared IRQ, but prints out a warning. PCMCIA drivers should allow for 656 * IRQ sharing and either use request_irq directly (then they need to call 657 * free_irq themselves, too), or the pcmcia_request_irq() function. 658 */ 659int __must_check 660__pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev, 661 irq_handler_t handler) 662{ 663 int ret; 664 665 if (!p_dev->irq) 666 return -EINVAL; 667 668 ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv); 669 if (ret) { 670 ret = pcmcia_request_irq(p_dev, handler); 671 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: " 672 "request for exclusive IRQ could not be fulfilled.\n"); 673 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver " 674 "needs updating to supported shared IRQ lines.\n"); 675 } 676 if (ret) 677 dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n"); 678 else 679 p_dev->_irq = 1; 680 681 return ret; 682} /* pcmcia_request_exclusive_irq */ 683EXPORT_SYMBOL(__pcmcia_request_exclusive_irq); 684 685 686#ifdef CONFIG_PCMCIA_PROBE 687 688/* mask of IRQs already reserved by other cards, we should avoid using them */ 689static u8 pcmcia_used_irq[32]; 690 691static irqreturn_t test_action(int cpl, void *dev_id) 692{ 693 return IRQ_NONE; 694} 695 696/** 697 * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used 698 * @p_dev - the associated PCMCIA device 699 * 700 * locking note: must be called with ops_mutex locked. 701 */ 702static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) 703{ 704 struct pcmcia_socket *s = p_dev->socket; 705 unsigned int try, irq; 706 u32 mask = s->irq_mask; 707 int ret = -ENODEV; 708 709 for (try = 0; try < 64; try++) { 710 irq = try % 32; 711 712 if (irq > NR_IRQS) 713 continue; 714 715 /* marked as available by driver, not blocked by userspace? */ 716 if (!((mask >> irq) & 1)) 717 continue; 718 719 /* avoid an IRQ which is already used by another PCMCIA card */ 720 if ((try < 32) && pcmcia_used_irq[irq]) 721 continue; 722 723 /* register the correct driver, if possible, to check whether 724 * registering a dummy handle works, i.e. if the IRQ isn't 725 * marked as used by the kernel resource management core */ 726 ret = request_irq(irq, test_action, type, p_dev->devname, 727 p_dev); 728 if (!ret) { 729 free_irq(irq, p_dev); 730 p_dev->irq = s->pcmcia_irq = irq; 731 pcmcia_used_irq[irq]++; 732 break; 733 } 734 } 735 736 return ret; 737} 738 739void pcmcia_cleanup_irq(struct pcmcia_socket *s) 740{ 741 pcmcia_used_irq[s->pcmcia_irq]--; 742 s->pcmcia_irq = 0; 743} 744 745#else /* CONFIG_PCMCIA_PROBE */ 746 747static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) 748{ 749 return -EINVAL; 750} 751 752void pcmcia_cleanup_irq(struct pcmcia_socket *s) 753{ 754 s->pcmcia_irq = 0; 755 return; 756} 757 758#endif /* CONFIG_PCMCIA_PROBE */ 759 760 761/** 762 * pcmcia_setup_irq() - determine IRQ to be used for device 763 * @p_dev - the associated PCMCIA device 764 * 765 * locking note: must be called with ops_mutex locked. 766 */ 767int pcmcia_setup_irq(struct pcmcia_device *p_dev) 768{ 769 struct pcmcia_socket *s = p_dev->socket; 770 771 if (p_dev->irq) 772 return 0; 773 774 /* already assigned? */ 775 if (s->pcmcia_irq) { 776 p_dev->irq = s->pcmcia_irq; 777 return 0; 778 } 779 780 /* prefer an exclusive ISA irq */ 781 if (!pcmcia_setup_isa_irq(p_dev, 0)) 782 return 0; 783 784 /* but accept a shared ISA irq */ 785 if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED)) 786 return 0; 787 788 /* but use the PCI irq otherwise */ 789 if (s->pci_irq) { 790 p_dev->irq = s->pcmcia_irq = s->pci_irq; 791 return 0; 792 } 793 794 return -EINVAL; 795} 796 797 798/** pcmcia_request_window 799 * 800 * Request_window() establishes a mapping between card memory space 801 * and system memory space. 802 */ 803int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh) 804{ 805 struct pcmcia_socket *s = p_dev->socket; 806 pccard_mem_map *win; 807 u_long align; 808 struct resource *res; 809 int w; 810 811 if (!(s->state & SOCKET_PRESENT)) { 812 dev_dbg(&p_dev->dev, "No card present\n"); 813 return -ENODEV; 814 } 815 816 /* Window size defaults to smallest available */ 817 if (req->Size == 0) 818 req->Size = s->map_size; 819 align = (s->features & SS_CAP_MEM_ALIGN) ? req->Size : s->map_size; 820 if (req->Size & (s->map_size-1)) { 821 dev_dbg(&p_dev->dev, "invalid map size\n"); 822 return -EINVAL; 823 } 824 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) || 825 (req->Base & (align-1))) { 826 dev_dbg(&p_dev->dev, "invalid base address\n"); 827 return -EINVAL; 828 } 829 if (req->Base) 830 align = 0; 831 832 /* Allocate system memory window */ 833 mutex_lock(&s->ops_mutex); 834 for (w = 0; w < MAX_WIN; w++) 835 if (!(s->state & SOCKET_WIN_REQ(w))) 836 break; 837 if (w == MAX_WIN) { 838 dev_dbg(&p_dev->dev, "all windows are used already\n"); 839 mutex_unlock(&s->ops_mutex); 840 return -EINVAL; 841 } 842 843 win = &s->win[w]; 844 845 if (!(s->features & SS_CAP_STATIC_MAP)) { 846 win->res = pcmcia_find_mem_region(req->Base, req->Size, align, 847 0, s); 848 if (!win->res) { 849 dev_dbg(&p_dev->dev, "allocating mem region failed\n"); 850 mutex_unlock(&s->ops_mutex); 851 return -EINVAL; 852 } 853 } 854 p_dev->_win |= CLIENT_WIN_REQ(w); 855 856 /* Configure the socket controller */ 857 win->map = w+1; 858 win->flags = req->Attributes; 859 win->speed = req->AccessSpeed; 860 win->card_start = 0; 861 862 if (s->ops->set_mem_map(s, win) != 0) { 863 dev_dbg(&p_dev->dev, "failed to set memory mapping\n"); 864 mutex_unlock(&s->ops_mutex); 865 return -EIO; 866 } 867 s->state |= SOCKET_WIN_REQ(w); 868 869 /* Return window handle */ 870 if (s->features & SS_CAP_STATIC_MAP) 871 req->Base = win->static_start; 872 else 873 req->Base = win->res->start; 874 875 /* convert to new-style resources */ 876 res = p_dev->resource[w + MAX_IO_WIN]; 877 res->start = req->Base; 878 res->end = req->Base + req->Size - 1; 879 res->flags &= ~IORESOURCE_BITS; 880 res->flags |= (req->Attributes & WIN_FLAGS_MAP) | (win->map << 2); 881 res->flags |= IORESOURCE_MEM; 882 res->parent = win->res; 883 if (win->res) 884 request_resource(&iomem_resource, res); 885 886 dev_dbg(&p_dev->dev, "request_window results in %pR\n", res); 887 888 mutex_unlock(&s->ops_mutex); 889 *wh = res; 890 891 return 0; 892} /* pcmcia_request_window */ 893EXPORT_SYMBOL(pcmcia_request_window); 894 895void pcmcia_disable_device(struct pcmcia_device *p_dev) 896{ 897 int i; 898 for (i = 0; i < MAX_WIN; i++) { 899 struct resource *res = p_dev->resource[MAX_IO_WIN + i]; 900 if (res->flags & WIN_FLAGS_REQ) 901 pcmcia_release_window(p_dev, res); 902 } 903 904 pcmcia_release_configuration(p_dev); 905 pcmcia_release_io(p_dev); 906 if (p_dev->_irq) { 907 free_irq(p_dev->irq, p_dev->priv); 908 p_dev->_irq = 0; 909 } 910} 911EXPORT_SYMBOL(pcmcia_disable_device); 912