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 s->socket.Vpp = mod->Vpp1; 309 if (s->ops->set_socket(s, &s->socket)) { 310 dev_printk(KERN_WARNING, &s->dev, 311 "Unable to set VPP\n"); 312 return -EIO; 313 } 314 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) || 315 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { 316 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n"); 317 return -EINVAL; 318 } 319 320 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) { 321 pccard_io_map io_off = { 0, 0, 0, 0, 1 }; 322 pccard_io_map io_on; 323 int i; 324 325 io_on.speed = io_speed; 326 for (i = 0; i < MAX_IO_WIN; i++) { 327 if (!s->io[i].res) 328 continue; 329 io_off.map = i; 330 io_on.map = i; 331 332 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8; 333 io_on.start = s->io[i].res->start; 334 io_on.stop = s->io[i].res->end; 335 336 s->ops->set_io_map(s, &io_off); 337 mdelay(40); 338 s->ops->set_io_map(s, &io_on); 339 } 340 } 341 342 return 0; 343 } /* modify_configuration */ 344 EXPORT_SYMBOL(pcmcia_modify_configuration); 345 346 347 int pcmcia_release_configuration(struct pcmcia_device *p_dev) 348 { 349 pccard_io_map io = { 0, 0, 0, 0, 1 }; 350 struct pcmcia_socket *s = p_dev->socket; 351 config_t *c = p_dev->function_config; 352 int i; 353 354 if (p_dev->_locked) { 355 p_dev->_locked = 0; 356 if (--(s->lock_count) == 0) { 357 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */ 358 s->socket.Vpp = 0; 359 s->socket.io_irq = 0; 360 s->ops->set_socket(s, &s->socket); 361 } 362 } 363 if (c->state & CONFIG_LOCKED) { 364 c->state &= ~CONFIG_LOCKED; 365 if (c->state & CONFIG_IO_REQ) 366 for (i = 0; i < MAX_IO_WIN; i++) { 367 if (!s->io[i].res) 368 continue; 369 s->io[i].Config--; 370 if (s->io[i].Config != 0) 371 continue; 372 io.map = i; 373 s->ops->set_io_map(s, &io); 374 } 375 } 376 377 return 0; 378 } /* pcmcia_release_configuration */ 379 380 381 /** pcmcia_release_io 382 * 383 * Release_io() releases the I/O ranges allocated by a client. This 384 * may be invoked some time after a card ejection has already dumped 385 * the actual socket configuration, so if the client is "stale", we 386 * don't bother checking the port ranges against the current socket 387 * values. 388 */ 389 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req) 390 { 391 struct pcmcia_socket *s = p_dev->socket; 392 config_t *c = p_dev->function_config; 393 394 if (!p_dev->_io ) 395 return -EINVAL; 396 397 p_dev->_io = 0; 398 399 if ((c->io.BasePort1 != req->BasePort1) || 400 (c->io.NumPorts1 != req->NumPorts1) || 401 (c->io.BasePort2 != req->BasePort2) || 402 (c->io.NumPorts2 != req->NumPorts2)) 403 return -EINVAL; 404 405 c->state &= ~CONFIG_IO_REQ; 406 407 release_io_space(s, req->BasePort1, req->NumPorts1); 408 if (req->NumPorts2) 409 release_io_space(s, req->BasePort2, req->NumPorts2); 410 411 return 0; 412 } /* pcmcia_release_io */ 413 414 415 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req) 416 { 417 struct pcmcia_socket *s = p_dev->socket; 418 config_t *c= p_dev->function_config; 419 420 if (!p_dev->_irq) 421 return -EINVAL; 422 p_dev->_irq = 0; 423 424 if (c->state & CONFIG_LOCKED) 425 return -EACCES; 426 if (c->irq.Attributes != req->Attributes) { 427 ds_dbg(s, 0, "IRQ attributes must match assigned ones\n"); 428 return -EINVAL; 429 } 430 if (s->irq.AssignedIRQ != req->AssignedIRQ) { 431 ds_dbg(s, 0, "IRQ must match assigned one\n"); 432 return -EINVAL; 433 } 434 if (--s->irq.Config == 0) { 435 c->state &= ~CONFIG_IRQ_REQ; 436 s->irq.AssignedIRQ = 0; 437 } 438 439 if (req->Attributes & IRQ_HANDLE_PRESENT) { 440 free_irq(req->AssignedIRQ, req->Instance); 441 } 442 443 #ifdef CONFIG_PCMCIA_PROBE 444 pcmcia_used_irq[req->AssignedIRQ]--; 445 #endif 446 447 return 0; 448 } /* pcmcia_release_irq */ 449 450 451 int pcmcia_release_window(window_handle_t win) 452 { 453 struct pcmcia_socket *s; 454 455 if ((win == NULL) || (win->magic != WINDOW_MAGIC)) 456 return -EINVAL; 457 s = win->sock; 458 if (!(win->handle->_win & CLIENT_WIN_REQ(win->index))) 459 return -EINVAL; 460 461 /* Shut down memory window */ 462 win->ctl.flags &= ~MAP_ACTIVE; 463 s->ops->set_mem_map(s, &win->ctl); 464 s->state &= ~SOCKET_WIN_REQ(win->index); 465 466 /* Release system memory */ 467 if (win->ctl.res) { 468 release_resource(win->ctl.res); 469 kfree(win->ctl.res); 470 win->ctl.res = NULL; 471 } 472 win->handle->_win &= ~CLIENT_WIN_REQ(win->index); 473 474 win->magic = 0; 475 476 return 0; 477 } /* pcmcia_release_window */ 478 EXPORT_SYMBOL(pcmcia_release_window); 479 480 481 int pcmcia_request_configuration(struct pcmcia_device *p_dev, 482 config_req_t *req) 483 { 484 int i; 485 u_int base; 486 struct pcmcia_socket *s = p_dev->socket; 487 config_t *c; 488 pccard_io_map iomap; 489 490 if (!(s->state & SOCKET_PRESENT)) 491 return -ENODEV;; 492 493 if (req->IntType & INT_CARDBUS) { 494 ds_dbg(p_dev->socket, 0, "IntType may not be INT_CARDBUS\n"); 495 return -EINVAL; 496 } 497 c = p_dev->function_config; 498 if (c->state & CONFIG_LOCKED) 499 return -EACCES; 500 501 /* Do power control. We don't allow changes in Vcc. */ 502 s->socket.Vpp = req->Vpp; 503 if (s->ops->set_socket(s, &s->socket)) { 504 dev_printk(KERN_WARNING, &s->dev, 505 "Unable to set socket state\n"); 506 return -EINVAL; 507 } 508 509 /* Pick memory or I/O card, DMA mode, interrupt */ 510 c->IntType = req->IntType; 511 c->Attributes = req->Attributes; 512 if (req->IntType & INT_MEMORY_AND_IO) 513 s->socket.flags |= SS_IOCARD; 514 if (req->IntType & INT_ZOOMED_VIDEO) 515 s->socket.flags |= SS_ZVCARD | SS_IOCARD; 516 if (req->Attributes & CONF_ENABLE_DMA) 517 s->socket.flags |= SS_DMA_MODE; 518 if (req->Attributes & CONF_ENABLE_SPKR) 519 s->socket.flags |= SS_SPKR_ENA; 520 if (req->Attributes & CONF_ENABLE_IRQ) 521 s->socket.io_irq = s->irq.AssignedIRQ; 522 else 523 s->socket.io_irq = 0; 524 s->ops->set_socket(s, &s->socket); 525 s->lock_count++; 526 527 /* Set up CIS configuration registers */ 528 base = c->ConfigBase = req->ConfigBase; 529 c->CardValues = req->Present; 530 if (req->Present & PRESENT_COPY) { 531 c->Copy = req->Copy; 532 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy); 533 } 534 if (req->Present & PRESENT_OPTION) { 535 if (s->functions == 1) { 536 c->Option = req->ConfigIndex & COR_CONFIG_MASK; 537 } else { 538 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK; 539 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA; 540 if (req->Present & PRESENT_IOBASE_0) 541 c->Option |= COR_ADDR_DECODE; 542 } 543 if (c->state & CONFIG_IRQ_REQ) 544 if (!(c->irq.Attributes & IRQ_FORCED_PULSE)) 545 c->Option |= COR_LEVEL_REQ; 546 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option); 547 mdelay(40); 548 } 549 if (req->Present & PRESENT_STATUS) { 550 c->Status = req->Status; 551 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status); 552 } 553 if (req->Present & PRESENT_PIN_REPLACE) { 554 c->Pin = req->Pin; 555 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin); 556 } 557 if (req->Present & PRESENT_EXT_STATUS) { 558 c->ExtStatus = req->ExtStatus; 559 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus); 560 } 561 if (req->Present & PRESENT_IOBASE_0) { 562 u_char b = c->io.BasePort1 & 0xff; 563 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b); 564 b = (c->io.BasePort1 >> 8) & 0xff; 565 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b); 566 } 567 if (req->Present & PRESENT_IOSIZE) { 568 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1; 569 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b); 570 } 571 572 /* Configure I/O windows */ 573 if (c->state & CONFIG_IO_REQ) { 574 iomap.speed = io_speed; 575 for (i = 0; i < MAX_IO_WIN; i++) 576 if (s->io[i].res) { 577 iomap.map = i; 578 iomap.flags = MAP_ACTIVE; 579 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) { 580 case IO_DATA_PATH_WIDTH_16: 581 iomap.flags |= MAP_16BIT; break; 582 case IO_DATA_PATH_WIDTH_AUTO: 583 iomap.flags |= MAP_AUTOSZ; break; 584 default: 585 break; 586 } 587 iomap.start = s->io[i].res->start; 588 iomap.stop = s->io[i].res->end; 589 s->ops->set_io_map(s, &iomap); 590 s->io[i].Config++; 591 } 592 } 593 594 c->state |= CONFIG_LOCKED; 595 p_dev->_locked = 1; 596 return 0; 597 } /* pcmcia_request_configuration */ 598 EXPORT_SYMBOL(pcmcia_request_configuration); 599 600 601 /** pcmcia_request_io 602 * 603 * Request_io() reserves ranges of port addresses for a socket. 604 * I have not implemented range sharing or alias addressing. 605 */ 606 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req) 607 { 608 struct pcmcia_socket *s = p_dev->socket; 609 config_t *c; 610 611 if (!(s->state & SOCKET_PRESENT)) 612 return -ENODEV; 613 614 if (!req) 615 return -EINVAL; 616 c = p_dev->function_config; 617 if (c->state & CONFIG_LOCKED) 618 return -EACCES; 619 if (c->state & CONFIG_IO_REQ) { 620 ds_dbg(s, 0, "IO already configured\n"); 621 return -EBUSY; 622 } 623 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) { 624 ds_dbg(s, 0, "bad attribute setting for IO region 1\n"); 625 return -EINVAL; 626 } 627 if ((req->NumPorts2 > 0) && 628 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) { 629 ds_dbg(s, 0, "bad attribute setting for IO region 2\n"); 630 return -EINVAL; 631 } 632 633 ds_dbg(s, 1, "trying to allocate resource 1\n"); 634 if (alloc_io_space(s, req->Attributes1, &req->BasePort1, 635 req->NumPorts1, req->IOAddrLines)) { 636 ds_dbg(s, 0, "allocation of resource 1 failed\n"); 637 return -EBUSY; 638 } 639 640 if (req->NumPorts2) { 641 ds_dbg(s, 1, "trying to allocate resource 2\n"); 642 if (alloc_io_space(s, req->Attributes2, &req->BasePort2, 643 req->NumPorts2, req->IOAddrLines)) { 644 ds_dbg(s, 0, "allocation of resource 2 failed\n"); 645 release_io_space(s, req->BasePort1, req->NumPorts1); 646 return -EBUSY; 647 } 648 } 649 650 c->io = *req; 651 c->state |= CONFIG_IO_REQ; 652 p_dev->_io = 1; 653 return 0; 654 } /* pcmcia_request_io */ 655 EXPORT_SYMBOL(pcmcia_request_io); 656 657 658 /** pcmcia_request_irq 659 * 660 * Request_irq() reserves an irq for this client. 661 * 662 * Also, since Linux only reserves irq's when they are actually 663 * hooked, we don't guarantee that an irq will still be available 664 * when the configuration is locked. Now that I think about it, 665 * there might be a way to fix this using a dummy handler. 666 */ 667 668 #ifdef CONFIG_PCMCIA_PROBE 669 static irqreturn_t test_action(int cpl, void *dev_id) 670 { 671 return IRQ_NONE; 672 } 673 #endif 674 675 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) 676 { 677 struct pcmcia_socket *s = p_dev->socket; 678 config_t *c; 679 int ret = -EINVAL, irq = 0; 680 int type; 681 682 if (!(s->state & SOCKET_PRESENT)) 683 return -ENODEV; 684 c = p_dev->function_config; 685 if (c->state & CONFIG_LOCKED) 686 return -EACCES; 687 if (c->state & CONFIG_IRQ_REQ) { 688 ds_dbg(s, 0, "IRQ already configured\n"); 689 return -EBUSY; 690 } 691 692 /* Decide what type of interrupt we are registering */ 693 type = 0; 694 if (s->functions > 1) /* All of this ought to be handled higher up */ 695 type = IRQF_SHARED; 696 else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) 697 type = IRQF_SHARED; 698 else printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n"); 699 700 #ifdef CONFIG_PCMCIA_PROBE 701 702 #ifdef IRQ_NOAUTOEN 703 /* if the underlying IRQ infrastructure allows for it, only allocate 704 * the IRQ, but do not enable it 705 */ 706 if (!(req->Attributes & IRQ_HANDLE_PRESENT)) 707 type |= IRQ_NOAUTOEN; 708 #endif /* IRQ_NOAUTOEN */ 709 710 if (s->irq.AssignedIRQ != 0) { 711 /* If the interrupt is already assigned, it must be the same */ 712 irq = s->irq.AssignedIRQ; 713 } else { 714 int try; 715 u32 mask = s->irq_mask; 716 void *data = &p_dev->dev.driver; /* something unique to this device */ 717 718 for (try = 0; try < 64; try++) { 719 irq = try % 32; 720 721 /* marked as available by driver, and not blocked by userspace? */ 722 if (!((mask >> irq) & 1)) 723 continue; 724 725 /* avoid an IRQ which is already used by a PCMCIA card */ 726 if ((try < 32) && pcmcia_used_irq[irq]) 727 continue; 728 729 /* register the correct driver, if possible, of check whether 730 * registering a dummy handle works, i.e. if the IRQ isn't 731 * marked as used by the kernel resource management core */ 732 ret = request_irq(irq, 733 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action, 734 type, 735 p_dev->devname, 736 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data); 737 if (!ret) { 738 if (!(req->Attributes & IRQ_HANDLE_PRESENT)) 739 free_irq(irq, data); 740 break; 741 } 742 } 743 } 744 #endif 745 /* only assign PCI irq if no IRQ already assigned */ 746 if (ret && !s->irq.AssignedIRQ) { 747 if (!s->pci_irq) 748 return ret; 749 type = IRQF_SHARED; 750 irq = s->pci_irq; 751 } 752 753 if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) { 754 ret = request_irq(irq, req->Handler, type, 755 p_dev->devname, req->Instance); 756 if (ret) 757 return ret; 758 } 759 760 /* Make sure the fact the request type was overridden is passed back */ 761 if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) { 762 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING; 763 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: " 764 "request for exclusive IRQ could not be fulfilled.\n"); 765 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver " 766 "needs updating to supported shared IRQ lines.\n"); 767 } 768 c->irq.Attributes = req->Attributes; 769 s->irq.AssignedIRQ = req->AssignedIRQ = irq; 770 s->irq.Config++; 771 772 c->state |= CONFIG_IRQ_REQ; 773 p_dev->_irq = 1; 774 775 #ifdef CONFIG_PCMCIA_PROBE 776 pcmcia_used_irq[irq]++; 777 #endif 778 779 return 0; 780 } /* pcmcia_request_irq */ 781 EXPORT_SYMBOL(pcmcia_request_irq); 782 783 784 /** pcmcia_request_window 785 * 786 * Request_window() establishes a mapping between card memory space 787 * and system memory space. 788 */ 789 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh) 790 { 791 struct pcmcia_socket *s = (*p_dev)->socket; 792 window_t *win; 793 u_long align; 794 int w; 795 796 if (!(s->state & SOCKET_PRESENT)) 797 return -ENODEV; 798 if (req->Attributes & (WIN_PAGED | WIN_SHARED)) { 799 ds_dbg(s, 0, "bad attribute setting for iomem region\n"); 800 return -EINVAL; 801 } 802 803 /* Window size defaults to smallest available */ 804 if (req->Size == 0) 805 req->Size = s->map_size; 806 align = (((s->features & SS_CAP_MEM_ALIGN) || 807 (req->Attributes & WIN_STRICT_ALIGN)) ? 808 req->Size : s->map_size); 809 if (req->Size & (s->map_size-1)) { 810 ds_dbg(s, 0, "invalid map size\n"); 811 return -EINVAL; 812 } 813 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) || 814 (req->Base & (align-1))) { 815 ds_dbg(s, 0, "invalid base address\n"); 816 return -EINVAL; 817 } 818 if (req->Base) 819 align = 0; 820 821 /* Allocate system memory window */ 822 for (w = 0; w < MAX_WIN; w++) 823 if (!(s->state & SOCKET_WIN_REQ(w))) break; 824 if (w == MAX_WIN) { 825 ds_dbg(s, 0, "all windows are used already\n"); 826 return -EINVAL; 827 } 828 829 win = &s->win[w]; 830 win->magic = WINDOW_MAGIC; 831 win->index = w; 832 win->handle = *p_dev; 833 win->sock = s; 834 835 if (!(s->features & SS_CAP_STATIC_MAP)) { 836 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align, 837 (req->Attributes & WIN_MAP_BELOW_1MB), s); 838 if (!win->ctl.res) { 839 ds_dbg(s, 0, "allocating mem region failed\n"); 840 return -EINVAL; 841 } 842 } 843 (*p_dev)->_win |= CLIENT_WIN_REQ(w); 844 845 /* Configure the socket controller */ 846 win->ctl.map = w+1; 847 win->ctl.flags = 0; 848 win->ctl.speed = req->AccessSpeed; 849 if (req->Attributes & WIN_MEMORY_TYPE) 850 win->ctl.flags |= MAP_ATTRIB; 851 if (req->Attributes & WIN_ENABLE) 852 win->ctl.flags |= MAP_ACTIVE; 853 if (req->Attributes & WIN_DATA_WIDTH_16) 854 win->ctl.flags |= MAP_16BIT; 855 if (req->Attributes & WIN_USE_WAIT) 856 win->ctl.flags |= MAP_USE_WAIT; 857 win->ctl.card_start = 0; 858 if (s->ops->set_mem_map(s, &win->ctl) != 0) { 859 ds_dbg(s, 0, "failed to set memory mapping\n"); 860 return -EIO; 861 } 862 s->state |= SOCKET_WIN_REQ(w); 863 864 /* Return window handle */ 865 if (s->features & SS_CAP_STATIC_MAP) { 866 req->Base = win->ctl.static_start; 867 } else { 868 req->Base = win->ctl.res->start; 869 } 870 *wh = win; 871 872 return 0; 873 } /* pcmcia_request_window */ 874 EXPORT_SYMBOL(pcmcia_request_window); 875 876 void pcmcia_disable_device(struct pcmcia_device *p_dev) { 877 pcmcia_release_configuration(p_dev); 878 pcmcia_release_io(p_dev, &p_dev->io); 879 pcmcia_release_irq(p_dev, &p_dev->irq); 880 if (p_dev->win) 881 pcmcia_release_window(p_dev->win); 882 } 883 EXPORT_SYMBOL(pcmcia_disable_device); 884 885 886 struct pcmcia_cfg_mem { 887 tuple_t tuple; 888 cisparse_t parse; 889 u8 buf[256]; 890 cistpl_cftable_entry_t dflt; 891 }; 892 893 /** 894 * pcmcia_loop_config() - loop over configuration options 895 * @p_dev: the struct pcmcia_device which we need to loop for. 896 * @conf_check: function to call for each configuration option. 897 * It gets passed the struct pcmcia_device, the CIS data 898 * describing the configuration option, and private data 899 * being passed to pcmcia_loop_config() 900 * @priv_data: private data to be passed to the conf_check function. 901 * 902 * pcmcia_loop_config() loops over all configuration options, and calls 903 * the driver-specific conf_check() for each one, checking whether 904 * it is a valid one. 905 */ 906 int pcmcia_loop_config(struct pcmcia_device *p_dev, 907 int (*conf_check) (struct pcmcia_device *p_dev, 908 cistpl_cftable_entry_t *cfg, 909 cistpl_cftable_entry_t *dflt, 910 unsigned int vcc, 911 void *priv_data), 912 void *priv_data) 913 { 914 struct pcmcia_cfg_mem *cfg_mem; 915 916 tuple_t *tuple; 917 int ret = -ENODEV; 918 unsigned int vcc; 919 920 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL); 921 if (cfg_mem == NULL) 922 return -ENOMEM; 923 924 /* get the current Vcc setting */ 925 vcc = p_dev->socket->socket.Vcc; 926 927 tuple = &cfg_mem->tuple; 928 tuple->TupleData = cfg_mem->buf; 929 tuple->TupleDataMax = 255; 930 tuple->TupleOffset = 0; 931 tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY; 932 tuple->Attributes = 0; 933 934 ret = pcmcia_get_first_tuple(p_dev, tuple); 935 while (!ret) { 936 cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry; 937 938 if (pcmcia_get_tuple_data(p_dev, tuple)) 939 goto next_entry; 940 941 if (pcmcia_parse_tuple(tuple, &cfg_mem->parse)) 942 goto next_entry; 943 944 /* default values */ 945 p_dev->conf.ConfigIndex = cfg->index; 946 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) 947 cfg_mem->dflt = *cfg; 948 949 ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data); 950 if (!ret) 951 break; 952 953 next_entry: 954 ret = pcmcia_get_next_tuple(p_dev, tuple); 955 } 956 957 return ret; 958 } 959 EXPORT_SYMBOL(pcmcia_loop_config); 960