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 24 #include <pcmcia/cs_types.h> 25 #include <pcmcia/ss.h> 26 #include <pcmcia/cs.h> 27 #include <pcmcia/cistpl.h> 28 #include <pcmcia/cisreg.h> 29 #include <pcmcia/ds.h> 30 31 #include "cs_internal.h" 32 33 34 /* Access speed for IO windows */ 35 static int io_speed = 0; 36 module_param(io_speed, int, 0444); 37 38 39 #ifdef CONFIG_PCMCIA_PROBE 40 #include <asm/irq.h> 41 /* mask of IRQs already reserved by other cards, we should avoid using them */ 42 static u8 pcmcia_used_irq[NR_IRQS]; 43 #endif 44 45 46 #ifdef CONFIG_PCMCIA_DEBUG 47 extern int ds_pc_debug; 48 49 #define ds_dbg(skt, lvl, fmt, arg...) do { \ 50 if (ds_pc_debug >= lvl) \ 51 dev_printk(KERN_DEBUG, &skt->dev, \ 52 "pcmcia_resource: " fmt, \ 53 ## arg); \ 54 } while (0) 55 #else 56 #define ds_dbg(skt, lvl, fmt, arg...) do { } while (0) 57 #endif 58 59 60 61 /** alloc_io_space 62 * 63 * Special stuff for managing IO windows, because they are scarce 64 */ 65 66 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, 67 unsigned int *base, unsigned int num, u_int lines) 68 { 69 int i; 70 unsigned int try, align; 71 72 align = (*base) ? (lines ? 1<<lines : 0) : 1; 73 if (align && (align < num)) { 74 if (*base) { 75 ds_dbg(s, 0, "odd IO request: num %#x align %#x\n", 76 num, align); 77 align = 0; 78 } else 79 while (align && (align < num)) align <<= 1; 80 } 81 if (*base & ~(align-1)) { 82 ds_dbg(s, 0, "odd IO request: base %#x align %#x\n", 83 *base, align); 84 align = 0; 85 } 86 if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) { 87 *base = s->io_offset | (*base & 0x0fff); 88 return 0; 89 } 90 /* Check for an already-allocated window that must conflict with 91 * what was asked for. It is a hack because it does not catch all 92 * potential conflicts, just the most obvious ones. 93 */ 94 for (i = 0; i < MAX_IO_WIN; i++) 95 if ((s->io[i].res) && *base && 96 ((s->io[i].res->start & (align-1)) == *base)) 97 return 1; 98 for (i = 0; i < MAX_IO_WIN; i++) { 99 if (!s->io[i].res) { 100 s->io[i].res = pcmcia_find_io_region(*base, num, align, s); 101 if (s->io[i].res) { 102 *base = s->io[i].res->start; 103 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS); 104 s->io[i].InUse = num; 105 break; 106 } else 107 return 1; 108 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS)) 109 continue; 110 /* Try to extend top of window */ 111 try = s->io[i].res->end + 1; 112 if ((*base == 0) || (*base == try)) 113 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start, 114 s->io[i].res->end + num, s) == 0) { 115 *base = try; 116 s->io[i].InUse += num; 117 break; 118 } 119 /* Try to extend bottom of window */ 120 try = s->io[i].res->start - num; 121 if ((*base == 0) || (*base == try)) 122 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num, 123 s->io[i].res->end, s) == 0) { 124 *base = try; 125 s->io[i].InUse += num; 126 break; 127 } 128 } 129 return (i == MAX_IO_WIN); 130 } /* alloc_io_space */ 131 132 133 static void release_io_space(struct pcmcia_socket *s, unsigned int base, 134 unsigned int num) 135 { 136 int i; 137 138 for (i = 0; i < MAX_IO_WIN; i++) { 139 if (!s->io[i].res) 140 continue; 141 if ((s->io[i].res->start <= base) && 142 (s->io[i].res->end >= base+num-1)) { 143 s->io[i].InUse -= num; 144 /* Free the window if no one else is using it */ 145 if (s->io[i].InUse == 0) { 146 release_resource(s->io[i].res); 147 kfree(s->io[i].res); 148 s->io[i].res = NULL; 149 } 150 } 151 } 152 } /* release_io_space */ 153 154 155 /** pccard_access_configuration_register 156 * 157 * Access_configuration_register() reads and writes configuration 158 * registers in attribute memory. Memory window 0 is reserved for 159 * this and the tuple reading services. 160 */ 161 162 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev, 163 conf_reg_t *reg) 164 { 165 struct pcmcia_socket *s; 166 config_t *c; 167 int addr; 168 u_char val; 169 170 if (!p_dev || !p_dev->function_config) 171 return -EINVAL; 172 173 s = p_dev->socket; 174 c = p_dev->function_config; 175 176 if (!(c->state & CONFIG_LOCKED)) 177 return -EACCES; 178 179 addr = (c->ConfigBase + reg->Offset) >> 1; 180 181 switch (reg->Action) { 182 case CS_READ: 183 pcmcia_read_cis_mem(s, 1, addr, 1, &val); 184 reg->Value = val; 185 break; 186 case CS_WRITE: 187 val = reg->Value; 188 pcmcia_write_cis_mem(s, 1, addr, 1, &val); 189 break; 190 default: 191 return -EINVAL; 192 break; 193 } 194 return 0; 195 } /* pcmcia_access_configuration_register */ 196 EXPORT_SYMBOL(pcmcia_access_configuration_register); 197 198 199 /** pcmcia_get_window 200 */ 201 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle, 202 int idx, win_req_t *req) 203 { 204 window_t *win; 205 int w; 206 207 if (!s || !(s->state & SOCKET_PRESENT)) 208 return -ENODEV; 209 for (w = idx; w < MAX_WIN; w++) 210 if (s->state & SOCKET_WIN_REQ(w)) 211 break; 212 if (w == MAX_WIN) 213 return -EINVAL; 214 win = &s->win[w]; 215 req->Base = win->ctl.res->start; 216 req->Size = win->ctl.res->end - win->ctl.res->start + 1; 217 req->AccessSpeed = win->ctl.speed; 218 req->Attributes = 0; 219 if (win->ctl.flags & MAP_ATTRIB) 220 req->Attributes |= WIN_MEMORY_TYPE_AM; 221 if (win->ctl.flags & MAP_ACTIVE) 222 req->Attributes |= WIN_ENABLE; 223 if (win->ctl.flags & MAP_16BIT) 224 req->Attributes |= WIN_DATA_WIDTH_16; 225 if (win->ctl.flags & MAP_USE_WAIT) 226 req->Attributes |= WIN_USE_WAIT; 227 *handle = win; 228 return 0; 229 } /* pcmcia_get_window */ 230 EXPORT_SYMBOL(pcmcia_get_window); 231 232 233 /** pcmcia_get_mem_page 234 * 235 * Change the card address of an already open memory window. 236 */ 237 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req) 238 { 239 if ((win == NULL) || (win->magic != WINDOW_MAGIC)) 240 return -EINVAL; 241 req->Page = 0; 242 req->CardOffset = win->ctl.card_start; 243 return 0; 244 } /* pcmcia_get_mem_page */ 245 EXPORT_SYMBOL(pcmcia_get_mem_page); 246 247 248 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req) 249 { 250 struct pcmcia_socket *s; 251 if ((win == NULL) || (win->magic != WINDOW_MAGIC)) 252 return -EINVAL; 253 s = win->sock; 254 if (req->Page != 0) { 255 ds_dbg(s, 0, "failure: requested page is zero\n"); 256 return -EINVAL; 257 } 258 win->ctl.card_start = req->CardOffset; 259 if (s->ops->set_mem_map(s, &win->ctl) != 0) { 260 ds_dbg(s, 0, "failed to set_mem_map\n"); 261 return -EIO; 262 } 263 return 0; 264 } /* pcmcia_map_mem_page */ 265 EXPORT_SYMBOL(pcmcia_map_mem_page); 266 267 268 /** pcmcia_modify_configuration 269 * 270 * Modify a locked socket configuration 271 */ 272 int pcmcia_modify_configuration(struct pcmcia_device *p_dev, 273 modconf_t *mod) 274 { 275 struct pcmcia_socket *s; 276 config_t *c; 277 278 s = p_dev->socket; 279 c = p_dev->function_config; 280 281 if (!(s->state & SOCKET_PRESENT)) 282 return -ENODEV; 283 if (!(c->state & CONFIG_LOCKED)) 284 return -EACCES; 285 286 if (mod->Attributes & CONF_IRQ_CHANGE_VALID) { 287 if (mod->Attributes & CONF_ENABLE_IRQ) { 288 c->Attributes |= CONF_ENABLE_IRQ; 289 s->socket.io_irq = s->irq.AssignedIRQ; 290 } else { 291 c->Attributes &= ~CONF_ENABLE_IRQ; 292 s->socket.io_irq = 0; 293 } 294 s->ops->set_socket(s, &s->socket); 295 } 296 297 if (mod->Attributes & CONF_VCC_CHANGE_VALID) { 298 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n"); 299 return -EINVAL; 300 } 301 302 /* We only allow changing Vpp1 and Vpp2 to the same value */ 303 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) && 304 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { 305 if (mod->Vpp1 != mod->Vpp2) { 306 ds_dbg(s, 0, "Vpp1 and Vpp2 must be the same\n"); 307 return -EINVAL; 308 } 309 s->socket.Vpp = mod->Vpp1; 310 if (s->ops->set_socket(s, &s->socket)) { 311 dev_printk(KERN_WARNING, &s->dev, 312 "Unable to set VPP\n"); 313 return -EIO; 314 } 315 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) || 316 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { 317 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n"); 318 return -EINVAL; 319 } 320 321 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) { 322 pccard_io_map io_off = { 0, 0, 0, 0, 1 }; 323 pccard_io_map io_on; 324 int i; 325 326 io_on.speed = io_speed; 327 for (i = 0; i < MAX_IO_WIN; i++) { 328 if (!s->io[i].res) 329 continue; 330 io_off.map = i; 331 io_on.map = i; 332 333 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8; 334 io_on.start = s->io[i].res->start; 335 io_on.stop = s->io[i].res->end; 336 337 s->ops->set_io_map(s, &io_off); 338 mdelay(40); 339 s->ops->set_io_map(s, &io_on); 340 } 341 } 342 343 return 0; 344 } /* modify_configuration */ 345 EXPORT_SYMBOL(pcmcia_modify_configuration); 346 347 348 int pcmcia_release_configuration(struct pcmcia_device *p_dev) 349 { 350 pccard_io_map io = { 0, 0, 0, 0, 1 }; 351 struct pcmcia_socket *s = p_dev->socket; 352 config_t *c = p_dev->function_config; 353 int i; 354 355 if (p_dev->_locked) { 356 p_dev->_locked = 0; 357 if (--(s->lock_count) == 0) { 358 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */ 359 s->socket.Vpp = 0; 360 s->socket.io_irq = 0; 361 s->ops->set_socket(s, &s->socket); 362 } 363 } 364 if (c->state & CONFIG_LOCKED) { 365 c->state &= ~CONFIG_LOCKED; 366 if (c->state & CONFIG_IO_REQ) 367 for (i = 0; i < MAX_IO_WIN; i++) { 368 if (!s->io[i].res) 369 continue; 370 s->io[i].Config--; 371 if (s->io[i].Config != 0) 372 continue; 373 io.map = i; 374 s->ops->set_io_map(s, &io); 375 } 376 } 377 378 return 0; 379 } /* pcmcia_release_configuration */ 380 381 382 /** pcmcia_release_io 383 * 384 * Release_io() releases the I/O ranges allocated by a client. This 385 * may be invoked some time after a card ejection has already dumped 386 * the actual socket configuration, so if the client is "stale", we 387 * don't bother checking the port ranges against the current socket 388 * values. 389 */ 390 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req) 391 { 392 struct pcmcia_socket *s = p_dev->socket; 393 config_t *c = p_dev->function_config; 394 395 if (!p_dev->_io ) 396 return -EINVAL; 397 398 p_dev->_io = 0; 399 400 if ((c->io.BasePort1 != req->BasePort1) || 401 (c->io.NumPorts1 != req->NumPorts1) || 402 (c->io.BasePort2 != req->BasePort2) || 403 (c->io.NumPorts2 != req->NumPorts2)) 404 return -EINVAL; 405 406 c->state &= ~CONFIG_IO_REQ; 407 408 release_io_space(s, req->BasePort1, req->NumPorts1); 409 if (req->NumPorts2) 410 release_io_space(s, req->BasePort2, req->NumPorts2); 411 412 return 0; 413 } /* pcmcia_release_io */ 414 415 416 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req) 417 { 418 struct pcmcia_socket *s = p_dev->socket; 419 config_t *c= p_dev->function_config; 420 421 if (!p_dev->_irq) 422 return -EINVAL; 423 p_dev->_irq = 0; 424 425 if (c->state & CONFIG_LOCKED) 426 return -EACCES; 427 if (c->irq.Attributes != req->Attributes) { 428 ds_dbg(s, 0, "IRQ attributes must match assigned ones\n"); 429 return -EINVAL; 430 } 431 if (s->irq.AssignedIRQ != req->AssignedIRQ) { 432 ds_dbg(s, 0, "IRQ must match assigned one\n"); 433 return -EINVAL; 434 } 435 if (--s->irq.Config == 0) { 436 c->state &= ~CONFIG_IRQ_REQ; 437 s->irq.AssignedIRQ = 0; 438 } 439 440 if (req->Attributes & IRQ_HANDLE_PRESENT) { 441 free_irq(req->AssignedIRQ, req->Instance); 442 } 443 444 #ifdef CONFIG_PCMCIA_PROBE 445 pcmcia_used_irq[req->AssignedIRQ]--; 446 #endif 447 448 return 0; 449 } /* pcmcia_release_irq */ 450 451 452 int pcmcia_release_window(window_handle_t win) 453 { 454 struct pcmcia_socket *s; 455 456 if ((win == NULL) || (win->magic != WINDOW_MAGIC)) 457 return -EINVAL; 458 s = win->sock; 459 if (!(win->handle->_win & CLIENT_WIN_REQ(win->index))) 460 return -EINVAL; 461 462 /* Shut down memory window */ 463 win->ctl.flags &= ~MAP_ACTIVE; 464 s->ops->set_mem_map(s, &win->ctl); 465 s->state &= ~SOCKET_WIN_REQ(win->index); 466 467 /* Release system memory */ 468 if (win->ctl.res) { 469 release_resource(win->ctl.res); 470 kfree(win->ctl.res); 471 win->ctl.res = NULL; 472 } 473 win->handle->_win &= ~CLIENT_WIN_REQ(win->index); 474 475 win->magic = 0; 476 477 return 0; 478 } /* pcmcia_release_window */ 479 EXPORT_SYMBOL(pcmcia_release_window); 480 481 482 int pcmcia_request_configuration(struct pcmcia_device *p_dev, 483 config_req_t *req) 484 { 485 int i; 486 u_int base; 487 struct pcmcia_socket *s = p_dev->socket; 488 config_t *c; 489 pccard_io_map iomap; 490 491 if (!(s->state & SOCKET_PRESENT)) 492 return -ENODEV; 493 494 if (req->IntType & INT_CARDBUS) { 495 ds_dbg(p_dev->socket, 0, "IntType may not be INT_CARDBUS\n"); 496 return -EINVAL; 497 } 498 c = p_dev->function_config; 499 if (c->state & CONFIG_LOCKED) 500 return -EACCES; 501 502 /* Do power control. We don't allow changes in Vcc. */ 503 s->socket.Vpp = req->Vpp; 504 if (s->ops->set_socket(s, &s->socket)) { 505 dev_printk(KERN_WARNING, &s->dev, 506 "Unable to set socket state\n"); 507 return -EINVAL; 508 } 509 510 /* Pick memory or I/O card, DMA mode, interrupt */ 511 c->IntType = req->IntType; 512 c->Attributes = req->Attributes; 513 if (req->IntType & INT_MEMORY_AND_IO) 514 s->socket.flags |= SS_IOCARD; 515 if (req->IntType & INT_ZOOMED_VIDEO) 516 s->socket.flags |= SS_ZVCARD | SS_IOCARD; 517 if (req->Attributes & CONF_ENABLE_DMA) 518 s->socket.flags |= SS_DMA_MODE; 519 if (req->Attributes & CONF_ENABLE_SPKR) 520 s->socket.flags |= SS_SPKR_ENA; 521 if (req->Attributes & CONF_ENABLE_IRQ) 522 s->socket.io_irq = s->irq.AssignedIRQ; 523 else 524 s->socket.io_irq = 0; 525 s->ops->set_socket(s, &s->socket); 526 s->lock_count++; 527 528 /* Set up CIS configuration registers */ 529 base = c->ConfigBase = req->ConfigBase; 530 c->CardValues = req->Present; 531 if (req->Present & PRESENT_COPY) { 532 c->Copy = req->Copy; 533 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy); 534 } 535 if (req->Present & PRESENT_OPTION) { 536 if (s->functions == 1) { 537 c->Option = req->ConfigIndex & COR_CONFIG_MASK; 538 } else { 539 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK; 540 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA; 541 if (req->Present & PRESENT_IOBASE_0) 542 c->Option |= COR_ADDR_DECODE; 543 } 544 if (c->state & CONFIG_IRQ_REQ) 545 if (!(c->irq.Attributes & IRQ_FORCED_PULSE)) 546 c->Option |= COR_LEVEL_REQ; 547 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option); 548 mdelay(40); 549 } 550 if (req->Present & PRESENT_STATUS) { 551 c->Status = req->Status; 552 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status); 553 } 554 if (req->Present & PRESENT_PIN_REPLACE) { 555 c->Pin = req->Pin; 556 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin); 557 } 558 if (req->Present & PRESENT_EXT_STATUS) { 559 c->ExtStatus = req->ExtStatus; 560 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus); 561 } 562 if (req->Present & PRESENT_IOBASE_0) { 563 u_char b = c->io.BasePort1 & 0xff; 564 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b); 565 b = (c->io.BasePort1 >> 8) & 0xff; 566 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b); 567 } 568 if (req->Present & PRESENT_IOSIZE) { 569 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1; 570 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b); 571 } 572 573 /* Configure I/O windows */ 574 if (c->state & CONFIG_IO_REQ) { 575 iomap.speed = io_speed; 576 for (i = 0; i < MAX_IO_WIN; i++) 577 if (s->io[i].res) { 578 iomap.map = i; 579 iomap.flags = MAP_ACTIVE; 580 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) { 581 case IO_DATA_PATH_WIDTH_16: 582 iomap.flags |= MAP_16BIT; break; 583 case IO_DATA_PATH_WIDTH_AUTO: 584 iomap.flags |= MAP_AUTOSZ; break; 585 default: 586 break; 587 } 588 iomap.start = s->io[i].res->start; 589 iomap.stop = s->io[i].res->end; 590 s->ops->set_io_map(s, &iomap); 591 s->io[i].Config++; 592 } 593 } 594 595 c->state |= CONFIG_LOCKED; 596 p_dev->_locked = 1; 597 return 0; 598 } /* pcmcia_request_configuration */ 599 EXPORT_SYMBOL(pcmcia_request_configuration); 600 601 602 /** pcmcia_request_io 603 * 604 * Request_io() reserves ranges of port addresses for a socket. 605 * I have not implemented range sharing or alias addressing. 606 */ 607 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req) 608 { 609 struct pcmcia_socket *s = p_dev->socket; 610 config_t *c; 611 612 if (!(s->state & SOCKET_PRESENT)) 613 return -ENODEV; 614 615 if (!req) 616 return -EINVAL; 617 c = p_dev->function_config; 618 if (c->state & CONFIG_LOCKED) 619 return -EACCES; 620 if (c->state & CONFIG_IO_REQ) { 621 ds_dbg(s, 0, "IO already configured\n"); 622 return -EBUSY; 623 } 624 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) { 625 ds_dbg(s, 0, "bad attribute setting for IO region 1\n"); 626 return -EINVAL; 627 } 628 if ((req->NumPorts2 > 0) && 629 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) { 630 ds_dbg(s, 0, "bad attribute setting for IO region 2\n"); 631 return -EINVAL; 632 } 633 634 ds_dbg(s, 1, "trying to allocate resource 1\n"); 635 if (alloc_io_space(s, req->Attributes1, &req->BasePort1, 636 req->NumPorts1, req->IOAddrLines)) { 637 ds_dbg(s, 0, "allocation of resource 1 failed\n"); 638 return -EBUSY; 639 } 640 641 if (req->NumPorts2) { 642 ds_dbg(s, 1, "trying to allocate resource 2\n"); 643 if (alloc_io_space(s, req->Attributes2, &req->BasePort2, 644 req->NumPorts2, req->IOAddrLines)) { 645 ds_dbg(s, 0, "allocation of resource 2 failed\n"); 646 release_io_space(s, req->BasePort1, req->NumPorts1); 647 return -EBUSY; 648 } 649 } 650 651 c->io = *req; 652 c->state |= CONFIG_IO_REQ; 653 p_dev->_io = 1; 654 return 0; 655 } /* pcmcia_request_io */ 656 EXPORT_SYMBOL(pcmcia_request_io); 657 658 659 /** pcmcia_request_irq 660 * 661 * Request_irq() reserves an irq for this client. 662 * 663 * Also, since Linux only reserves irq's when they are actually 664 * hooked, we don't guarantee that an irq will still be available 665 * when the configuration is locked. Now that I think about it, 666 * there might be a way to fix this using a dummy handler. 667 */ 668 669 #ifdef CONFIG_PCMCIA_PROBE 670 static irqreturn_t test_action(int cpl, void *dev_id) 671 { 672 return IRQ_NONE; 673 } 674 #endif 675 676 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) 677 { 678 struct pcmcia_socket *s = p_dev->socket; 679 config_t *c; 680 int ret = -EINVAL, irq = 0; 681 int type; 682 683 if (!(s->state & SOCKET_PRESENT)) 684 return -ENODEV; 685 c = p_dev->function_config; 686 if (c->state & CONFIG_LOCKED) 687 return -EACCES; 688 if (c->state & CONFIG_IRQ_REQ) { 689 ds_dbg(s, 0, "IRQ already configured\n"); 690 return -EBUSY; 691 } 692 693 /* Decide what type of interrupt we are registering */ 694 type = 0; 695 if (s->functions > 1) /* All of this ought to be handled higher up */ 696 type = IRQF_SHARED; 697 else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) 698 type = IRQF_SHARED; 699 else printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n"); 700 701 #ifdef CONFIG_PCMCIA_PROBE 702 703 #ifdef IRQ_NOAUTOEN 704 /* if the underlying IRQ infrastructure allows for it, only allocate 705 * the IRQ, but do not enable it 706 */ 707 if (!(req->Attributes & IRQ_HANDLE_PRESENT)) 708 type |= IRQ_NOAUTOEN; 709 #endif /* IRQ_NOAUTOEN */ 710 711 if (s->irq.AssignedIRQ != 0) { 712 /* If the interrupt is already assigned, it must be the same */ 713 irq = s->irq.AssignedIRQ; 714 } else { 715 int try; 716 u32 mask = s->irq_mask; 717 void *data = &p_dev->dev.driver; /* something unique to this device */ 718 719 for (try = 0; try < 64; try++) { 720 irq = try % 32; 721 722 /* marked as available by driver, and not blocked by userspace? */ 723 if (!((mask >> irq) & 1)) 724 continue; 725 726 /* avoid an IRQ which is already used by a PCMCIA card */ 727 if ((try < 32) && pcmcia_used_irq[irq]) 728 continue; 729 730 /* register the correct driver, if possible, of check whether 731 * registering a dummy handle works, i.e. if the IRQ isn't 732 * marked as used by the kernel resource management core */ 733 ret = request_irq(irq, 734 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action, 735 type, 736 p_dev->devname, 737 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data); 738 if (!ret) { 739 if (!(req->Attributes & IRQ_HANDLE_PRESENT)) 740 free_irq(irq, data); 741 break; 742 } 743 } 744 } 745 #endif 746 /* only assign PCI irq if no IRQ already assigned */ 747 if (ret && !s->irq.AssignedIRQ) { 748 if (!s->pci_irq) 749 return ret; 750 type = IRQF_SHARED; 751 irq = s->pci_irq; 752 } 753 754 if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) { 755 ret = request_irq(irq, req->Handler, type, 756 p_dev->devname, req->Instance); 757 if (ret) 758 return ret; 759 } 760 761 /* Make sure the fact the request type was overridden is passed back */ 762 if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) { 763 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING; 764 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: " 765 "request for exclusive IRQ could not be fulfilled.\n"); 766 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver " 767 "needs updating to supported shared IRQ lines.\n"); 768 } 769 c->irq.Attributes = req->Attributes; 770 s->irq.AssignedIRQ = req->AssignedIRQ = irq; 771 s->irq.Config++; 772 773 c->state |= CONFIG_IRQ_REQ; 774 p_dev->_irq = 1; 775 776 #ifdef CONFIG_PCMCIA_PROBE 777 pcmcia_used_irq[irq]++; 778 #endif 779 780 return 0; 781 } /* pcmcia_request_irq */ 782 EXPORT_SYMBOL(pcmcia_request_irq); 783 784 785 /** pcmcia_request_window 786 * 787 * Request_window() establishes a mapping between card memory space 788 * and system memory space. 789 */ 790 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh) 791 { 792 struct pcmcia_socket *s = (*p_dev)->socket; 793 window_t *win; 794 u_long align; 795 int w; 796 797 if (!(s->state & SOCKET_PRESENT)) 798 return -ENODEV; 799 if (req->Attributes & (WIN_PAGED | WIN_SHARED)) { 800 ds_dbg(s, 0, "bad attribute setting for iomem region\n"); 801 return -EINVAL; 802 } 803 804 /* Window size defaults to smallest available */ 805 if (req->Size == 0) 806 req->Size = s->map_size; 807 align = (((s->features & SS_CAP_MEM_ALIGN) || 808 (req->Attributes & WIN_STRICT_ALIGN)) ? 809 req->Size : s->map_size); 810 if (req->Size & (s->map_size-1)) { 811 ds_dbg(s, 0, "invalid map size\n"); 812 return -EINVAL; 813 } 814 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) || 815 (req->Base & (align-1))) { 816 ds_dbg(s, 0, "invalid base address\n"); 817 return -EINVAL; 818 } 819 if (req->Base) 820 align = 0; 821 822 /* Allocate system memory window */ 823 for (w = 0; w < MAX_WIN; w++) 824 if (!(s->state & SOCKET_WIN_REQ(w))) break; 825 if (w == MAX_WIN) { 826 ds_dbg(s, 0, "all windows are used already\n"); 827 return -EINVAL; 828 } 829 830 win = &s->win[w]; 831 win->magic = WINDOW_MAGIC; 832 win->index = w; 833 win->handle = *p_dev; 834 win->sock = s; 835 836 if (!(s->features & SS_CAP_STATIC_MAP)) { 837 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align, 838 (req->Attributes & WIN_MAP_BELOW_1MB), s); 839 if (!win->ctl.res) { 840 ds_dbg(s, 0, "allocating mem region failed\n"); 841 return -EINVAL; 842 } 843 } 844 (*p_dev)->_win |= CLIENT_WIN_REQ(w); 845 846 /* Configure the socket controller */ 847 win->ctl.map = w+1; 848 win->ctl.flags = 0; 849 win->ctl.speed = req->AccessSpeed; 850 if (req->Attributes & WIN_MEMORY_TYPE) 851 win->ctl.flags |= MAP_ATTRIB; 852 if (req->Attributes & WIN_ENABLE) 853 win->ctl.flags |= MAP_ACTIVE; 854 if (req->Attributes & WIN_DATA_WIDTH_16) 855 win->ctl.flags |= MAP_16BIT; 856 if (req->Attributes & WIN_USE_WAIT) 857 win->ctl.flags |= MAP_USE_WAIT; 858 win->ctl.card_start = 0; 859 if (s->ops->set_mem_map(s, &win->ctl) != 0) { 860 ds_dbg(s, 0, "failed to set memory mapping\n"); 861 return -EIO; 862 } 863 s->state |= SOCKET_WIN_REQ(w); 864 865 /* Return window handle */ 866 if (s->features & SS_CAP_STATIC_MAP) { 867 req->Base = win->ctl.static_start; 868 } else { 869 req->Base = win->ctl.res->start; 870 } 871 *wh = win; 872 873 return 0; 874 } /* pcmcia_request_window */ 875 EXPORT_SYMBOL(pcmcia_request_window); 876 877 void pcmcia_disable_device(struct pcmcia_device *p_dev) { 878 pcmcia_release_configuration(p_dev); 879 pcmcia_release_io(p_dev, &p_dev->io); 880 pcmcia_release_irq(p_dev, &p_dev->irq); 881 if (p_dev->win) 882 pcmcia_release_window(p_dev->win); 883 } 884 EXPORT_SYMBOL(pcmcia_disable_device); 885 886 887 struct pcmcia_cfg_mem { 888 tuple_t tuple; 889 cisparse_t parse; 890 u8 buf[256]; 891 cistpl_cftable_entry_t dflt; 892 }; 893 894 /** 895 * pcmcia_loop_config() - loop over configuration options 896 * @p_dev: the struct pcmcia_device which we need to loop for. 897 * @conf_check: function to call for each configuration option. 898 * It gets passed the struct pcmcia_device, the CIS data 899 * describing the configuration option, and private data 900 * being passed to pcmcia_loop_config() 901 * @priv_data: private data to be passed to the conf_check function. 902 * 903 * pcmcia_loop_config() loops over all configuration options, and calls 904 * the driver-specific conf_check() for each one, checking whether 905 * it is a valid one. Returns 0 on success or errorcode otherwise. 906 */ 907 int pcmcia_loop_config(struct pcmcia_device *p_dev, 908 int (*conf_check) (struct pcmcia_device *p_dev, 909 cistpl_cftable_entry_t *cfg, 910 cistpl_cftable_entry_t *dflt, 911 unsigned int vcc, 912 void *priv_data), 913 void *priv_data) 914 { 915 struct pcmcia_cfg_mem *cfg_mem; 916 917 tuple_t *tuple; 918 int ret; 919 unsigned int vcc; 920 921 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL); 922 if (cfg_mem == NULL) 923 return -ENOMEM; 924 925 /* get the current Vcc setting */ 926 vcc = p_dev->socket->socket.Vcc; 927 928 tuple = &cfg_mem->tuple; 929 tuple->TupleData = cfg_mem->buf; 930 tuple->TupleDataMax = 255; 931 tuple->TupleOffset = 0; 932 tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY; 933 tuple->Attributes = 0; 934 935 ret = pcmcia_get_first_tuple(p_dev, tuple); 936 while (!ret) { 937 cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry; 938 939 if (pcmcia_get_tuple_data(p_dev, tuple)) 940 goto next_entry; 941 942 if (pcmcia_parse_tuple(tuple, &cfg_mem->parse)) 943 goto next_entry; 944 945 /* default values */ 946 p_dev->conf.ConfigIndex = cfg->index; 947 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) 948 cfg_mem->dflt = *cfg; 949 950 ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data); 951 if (!ret) 952 break; 953 954 next_entry: 955 ret = pcmcia_get_next_tuple(p_dev, tuple); 956 } 957 958 return ret; 959 } 960 EXPORT_SYMBOL(pcmcia_loop_config); 961