drivers/pcmcia/pcmcia_resource.c

   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 #include "ds_internal.h"
  33
  34
  35 /* Access speed for IO windows */
  36 static int io_speed = 0;
  37 module_param(io_speed, int, 0444);
  38
  39
  40 #ifdef CONFIG_PCMCIA_PROBE
  41 #include <asm/irq.h>
  42 /* mask of IRQs already reserved by other cards, we should avoid using them */
  43 static u8 pcmcia_used_irq[NR_IRQS];
  44 #endif
  45
  46
  47 #ifdef DEBUG
  48 extern int ds_pc_debug;
  49
  50 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  51         if (ds_pc_debug >= lvl)                                 \
  52                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  53                         cs_socket_name(skt) , ## arg);          \
  54 } while (0)
  55 #else
  56 #define ds_dbg(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 CS_NO_CARD;
 172
 173         s = p_dev->socket;
 174         c = p_dev->function_config;
 175
 176         if (!(c->state & CONFIG_LOCKED))
 177                 return CS_CONFIGURATION_LOCKED;
 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 CS_BAD_ARGS;
 192                 break;
 193         }
 194         return CS_SUCCESS;
 195 } /* pcmcia_access_configuration_register */
 196 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 197
 198
 199 int pccard_get_configuration_info(struct pcmcia_socket *s,
 200                                   struct pcmcia_device *p_dev,
 201                                   config_info_t *config)
 202 {
 203         config_t *c;
 204
 205         if (!(s->state & SOCKET_PRESENT))
 206                 return CS_NO_CARD;
 207
 208
 209 #ifdef CONFIG_CARDBUS
 210         if (s->state & SOCKET_CARDBUS) {
 211                 memset(config, 0, sizeof(config_info_t));
 212                 config->Vcc = s->socket.Vcc;
 213                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 214                 config->Option = s->cb_dev->subordinate->number;
 215                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 216                         config->Attributes = CONF_VALID_CLIENT;
 217                         config->IntType = INT_CARDBUS;
 218                         config->AssignedIRQ = s->irq.AssignedIRQ;
 219                         if (config->AssignedIRQ)
 220                                 config->Attributes |= CONF_ENABLE_IRQ;
 221                         if (s->io[0].res) {
 222                                 config->BasePort1 = s->io[0].res->start;
 223                                 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
 224                         }
 225                 }
 226                 return CS_SUCCESS;
 227         }
 228 #endif
 229
 230         if (p_dev) {
 231                 c = p_dev->function_config;
 232                 config->Function = p_dev->func;
 233         } else {
 234                 c = NULL;
 235                 config->Function = 0;
 236         }
 237
 238         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 239                 config->Attributes = 0;
 240                 config->Vcc = s->socket.Vcc;
 241                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 242                 return CS_SUCCESS;
 243         }
 244
 245         config->Attributes = c->Attributes | CONF_VALID_CLIENT;
 246         config->Vcc = s->socket.Vcc;
 247         config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 248         config->IntType = c->IntType;
 249         config->ConfigBase = c->ConfigBase;
 250         config->Status = c->Status;
 251         config->Pin = c->Pin;
 252         config->Copy = c->Copy;
 253         config->Option = c->Option;
 254         config->ExtStatus = c->ExtStatus;
 255         config->Present = config->CardValues = c->CardValues;
 256         config->IRQAttributes = c->irq.Attributes;
 257         config->AssignedIRQ = s->irq.AssignedIRQ;
 258         config->BasePort1 = c->io.BasePort1;
 259         config->NumPorts1 = c->io.NumPorts1;
 260         config->Attributes1 = c->io.Attributes1;
 261         config->BasePort2 = c->io.BasePort2;
 262         config->NumPorts2 = c->io.NumPorts2;
 263         config->Attributes2 = c->io.Attributes2;
 264         config->IOAddrLines = c->io.IOAddrLines;
 265
 266         return CS_SUCCESS;
 267 } /* pccard_get_configuration_info */
 268
 269 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 270                                   config_info_t *config)
 271 {
 272         return pccard_get_configuration_info(p_dev->socket, p_dev,
 273                                              config);
 274 }
 275 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 276
 277
 278 /** pcmcia_get_window
 279  */
 280 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 281                       int idx, win_req_t *req)
 282 {
 283         window_t *win;
 284         int w;
 285
 286         if (!s || !(s->state & SOCKET_PRESENT))
 287                 return CS_NO_CARD;
 288         for (w = idx; w < MAX_WIN; w++)
 289                 if (s->state & SOCKET_WIN_REQ(w))
 290                         break;
 291         if (w == MAX_WIN)
 292                 return CS_NO_MORE_ITEMS;
 293         win = &s->win[w];
 294         req->Base = win->ctl.res->start;
 295         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 296         req->AccessSpeed = win->ctl.speed;
 297         req->Attributes = 0;
 298         if (win->ctl.flags & MAP_ATTRIB)
 299                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 300         if (win->ctl.flags & MAP_ACTIVE)
 301                 req->Attributes |= WIN_ENABLE;
 302         if (win->ctl.flags & MAP_16BIT)
 303                 req->Attributes |= WIN_DATA_WIDTH_16;
 304         if (win->ctl.flags & MAP_USE_WAIT)
 305                 req->Attributes |= WIN_USE_WAIT;
 306         *handle = win;
 307         return CS_SUCCESS;
 308 } /* pcmcia_get_window */
 309 EXPORT_SYMBOL(pcmcia_get_window);
 310
 311
 312 /** pcmcia_get_mem_page
 313  *
 314  * Change the card address of an already open memory window.
 315  */
 316 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 317 {
 318         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 319                 return CS_BAD_HANDLE;
 320         req->Page = 0;
 321         req->CardOffset = win->ctl.card_start;
 322         return CS_SUCCESS;
 323 } /* pcmcia_get_mem_page */
 324 EXPORT_SYMBOL(pcmcia_get_mem_page);
 325
 326
 327 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 328 {
 329         struct pcmcia_socket *s;
 330         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 331                 return CS_BAD_HANDLE;
 332         if (req->Page != 0)
 333                 return CS_BAD_PAGE;
 334         s = win->sock;
 335         win->ctl.card_start = req->CardOffset;
 336         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 337                 return CS_BAD_OFFSET;
 338         return CS_SUCCESS;
 339 } /* pcmcia_map_mem_page */
 340 EXPORT_SYMBOL(pcmcia_map_mem_page);
 341
 342
 343 /** pcmcia_modify_configuration
 344  *
 345  * Modify a locked socket configuration
 346  */
 347 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 348                                 modconf_t *mod)
 349 {
 350         struct pcmcia_socket *s;
 351         config_t *c;
 352
 353         s = p_dev->socket;
 354         c = p_dev->function_config;
 355
 356         if (!(s->state & SOCKET_PRESENT))
 357                 return CS_NO_CARD;
 358         if (!(c->state & CONFIG_LOCKED))
 359                 return CS_CONFIGURATION_LOCKED;
 360
 361         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 362                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 363                         c->Attributes |= CONF_ENABLE_IRQ;
 364                         s->socket.io_irq = s->irq.AssignedIRQ;
 365                 } else {
 366                         c->Attributes &= ~CONF_ENABLE_IRQ;
 367                         s->socket.io_irq = 0;
 368                 }
 369                 s->ops->set_socket(s, &s->socket);
 370         }
 371
 372         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 373                 return CS_BAD_VCC;
 374
 375         /* We only allow changing Vpp1 and Vpp2 to the same value */
 376         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 377             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 378                 if (mod->Vpp1 != mod->Vpp2)
 379                         return CS_BAD_VPP;
 380                 s->socket.Vpp = mod->Vpp1;
 381                 if (s->ops->set_socket(s, &s->socket))
 382                         return CS_BAD_VPP;
 383         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 384                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 385                 return CS_BAD_VPP;
 386
 387         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 388                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 389                 pccard_io_map io_on;
 390                 int i;
 391
 392                 io_on.speed = io_speed;
 393                 for (i = 0; i < MAX_IO_WIN; i++) {
 394                         if (!s->io[i].res)
 395                                 continue;
 396                         io_off.map = i;
 397                         io_on.map = i;
 398
 399                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 400                         io_on.start = s->io[i].res->start;
 401                         io_on.stop = s->io[i].res->end;
 402
 403                         s->ops->set_io_map(s, &io_off);
 404                         mdelay(40);
 405                         s->ops->set_io_map(s, &io_on);
 406                 }
 407         }
 408
 409         return CS_SUCCESS;
 410 } /* modify_configuration */
 411 EXPORT_SYMBOL(pcmcia_modify_configuration);
 412
 413
 414 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 415 {
 416         pccard_io_map io = { 0, 0, 0, 0, 1 };
 417         struct pcmcia_socket *s = p_dev->socket;
 418         config_t *c = p_dev->function_config;
 419         int i;
 420
 421         if (p_dev->_locked) {
 422                 p_dev->_locked = 0;
 423                 if (--(s->lock_count) == 0) {
 424                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 425                         s->socket.Vpp = 0;
 426                         s->socket.io_irq = 0;
 427                         s->ops->set_socket(s, &s->socket);
 428                 }
 429         }
 430         if (c->state & CONFIG_LOCKED) {
 431                 c->state &= ~CONFIG_LOCKED;
 432                 if (c->state & CONFIG_IO_REQ)
 433                         for (i = 0; i < MAX_IO_WIN; i++) {
 434                                 if (!s->io[i].res)
 435                                         continue;
 436                                 s->io[i].Config--;
 437                                 if (s->io[i].Config != 0)
 438                                         continue;
 439                                 io.map = i;
 440                                 s->ops->set_io_map(s, &io);
 441                         }
 442         }
 443
 444         return CS_SUCCESS;
 445 } /* pcmcia_release_configuration */
 446
 447
 448 /** pcmcia_release_io
 449  *
 450  * Release_io() releases the I/O ranges allocated by a client.  This
 451  * may be invoked some time after a card ejection has already dumped
 452  * the actual socket configuration, so if the client is "stale", we
 453  * don't bother checking the port ranges against the current socket
 454  * values.
 455  */
 456 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 457 {
 458         struct pcmcia_socket *s = p_dev->socket;
 459         config_t *c = p_dev->function_config;
 460
 461         if (!p_dev->_io )
 462                 return CS_BAD_HANDLE;
 463
 464         p_dev->_io = 0;
 465
 466         if ((c->io.BasePort1 != req->BasePort1) ||
 467             (c->io.NumPorts1 != req->NumPorts1) ||
 468             (c->io.BasePort2 != req->BasePort2) ||
 469             (c->io.NumPorts2 != req->NumPorts2))
 470                 return CS_BAD_ARGS;
 471
 472         c->state &= ~CONFIG_IO_REQ;
 473
 474         release_io_space(s, req->BasePort1, req->NumPorts1);
 475         if (req->NumPorts2)
 476                 release_io_space(s, req->BasePort2, req->NumPorts2);
 477
 478         return CS_SUCCESS;
 479 } /* pcmcia_release_io */
 480
 481
 482 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 483 {
 484         struct pcmcia_socket *s = p_dev->socket;
 485         config_t *c= p_dev->function_config;
 486
 487         if (!p_dev->_irq)
 488                 return CS_BAD_HANDLE;
 489         p_dev->_irq = 0;
 490
 491         if (c->state & CONFIG_LOCKED)
 492                 return CS_CONFIGURATION_LOCKED;
 493         if (c->irq.Attributes != req->Attributes)
 494                 return CS_BAD_ATTRIBUTE;
 495         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 496                 return CS_BAD_IRQ;
 497         if (--s->irq.Config == 0) {
 498                 c->state &= ~CONFIG_IRQ_REQ;
 499                 s->irq.AssignedIRQ = 0;
 500         }
 501
 502         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 503                 free_irq(req->AssignedIRQ, req->Instance);
 504         }
 505
 506 #ifdef CONFIG_PCMCIA_PROBE
 507         pcmcia_used_irq[req->AssignedIRQ]--;
 508 #endif
 509
 510         return CS_SUCCESS;
 511 } /* pcmcia_release_irq */
 512
 513
 514 int pcmcia_release_window(window_handle_t win)
 515 {
 516         struct pcmcia_socket *s;
 517
 518         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 519                 return CS_BAD_HANDLE;
 520         s = win->sock;
 521         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 522                 return CS_BAD_HANDLE;
 523
 524         /* Shut down memory window */
 525         win->ctl.flags &= ~MAP_ACTIVE;
 526         s->ops->set_mem_map(s, &win->ctl);
 527         s->state &= ~SOCKET_WIN_REQ(win->index);
 528
 529         /* Release system memory */
 530         if (win->ctl.res) {
 531                 release_resource(win->ctl.res);
 532                 kfree(win->ctl.res);
 533                 win->ctl.res = NULL;
 534         }
 535         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 536
 537         win->magic = 0;
 538
 539         return CS_SUCCESS;
 540 } /* pcmcia_release_window */
 541 EXPORT_SYMBOL(pcmcia_release_window);
 542
 543
 544 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 545                                  config_req_t *req)
 546 {
 547         int i;
 548         u_int base;
 549         struct pcmcia_socket *s = p_dev->socket;
 550         config_t *c;
 551         pccard_io_map iomap;
 552
 553         if (!(s->state & SOCKET_PRESENT))
 554                 return CS_NO_CARD;
 555
 556         if (req->IntType & INT_CARDBUS)
 557                 return CS_UNSUPPORTED_MODE;
 558         c = p_dev->function_config;
 559         if (c->state & CONFIG_LOCKED)
 560                 return CS_CONFIGURATION_LOCKED;
 561
 562         /* Do power control.  We don't allow changes in Vcc. */
 563         s->socket.Vpp = req->Vpp;
 564         if (s->ops->set_socket(s, &s->socket))
 565                 return CS_BAD_VPP;
 566
 567         /* Pick memory or I/O card, DMA mode, interrupt */
 568         c->IntType = req->IntType;
 569         c->Attributes = req->Attributes;
 570         if (req->IntType & INT_MEMORY_AND_IO)
 571                 s->socket.flags |= SS_IOCARD;
 572         if (req->IntType & INT_ZOOMED_VIDEO)
 573                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 574         if (req->Attributes & CONF_ENABLE_DMA)
 575                 s->socket.flags |= SS_DMA_MODE;
 576         if (req->Attributes & CONF_ENABLE_SPKR)
 577                 s->socket.flags |= SS_SPKR_ENA;
 578         if (req->Attributes & CONF_ENABLE_IRQ)
 579                 s->socket.io_irq = s->irq.AssignedIRQ;
 580         else
 581                 s->socket.io_irq = 0;
 582         s->ops->set_socket(s, &s->socket);
 583         s->lock_count++;
 584
 585         /* Set up CIS configuration registers */
 586         base = c->ConfigBase = req->ConfigBase;
 587         c->CardValues = req->Present;
 588         if (req->Present & PRESENT_COPY) {
 589                 c->Copy = req->Copy;
 590                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 591         }
 592         if (req->Present & PRESENT_OPTION) {
 593                 if (s->functions == 1) {
 594                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 595                 } else {
 596                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 597                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 598                         if (req->Present & PRESENT_IOBASE_0)
 599                                 c->Option |= COR_ADDR_DECODE;
 600                 }
 601                 if (c->state & CONFIG_IRQ_REQ)
 602                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 603                                 c->Option |= COR_LEVEL_REQ;
 604                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 605                 mdelay(40);
 606         }
 607         if (req->Present & PRESENT_STATUS) {
 608                 c->Status = req->Status;
 609                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 610         }
 611         if (req->Present & PRESENT_PIN_REPLACE) {
 612                 c->Pin = req->Pin;
 613                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 614         }
 615         if (req->Present & PRESENT_EXT_STATUS) {
 616                 c->ExtStatus = req->ExtStatus;
 617                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 618         }
 619         if (req->Present & PRESENT_IOBASE_0) {
 620                 u_char b = c->io.BasePort1 & 0xff;
 621                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 622                 b = (c->io.BasePort1 >> 8) & 0xff;
 623                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 624         }
 625         if (req->Present & PRESENT_IOSIZE) {
 626                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 627                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 628         }
 629
 630         /* Configure I/O windows */
 631         if (c->state & CONFIG_IO_REQ) {
 632                 iomap.speed = io_speed;
 633                 for (i = 0; i < MAX_IO_WIN; i++)
 634                         if (s->io[i].res) {
 635                                 iomap.map = i;
 636                                 iomap.flags = MAP_ACTIVE;
 637                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 638                                 case IO_DATA_PATH_WIDTH_16:
 639                                         iomap.flags |= MAP_16BIT; break;
 640                                 case IO_DATA_PATH_WIDTH_AUTO:
 641                                         iomap.flags |= MAP_AUTOSZ; break;
 642                                 default:
 643                                         break;
 644                                 }
 645                                 iomap.start = s->io[i].res->start;
 646                                 iomap.stop = s->io[i].res->end;
 647                                 s->ops->set_io_map(s, &iomap);
 648                                 s->io[i].Config++;
 649                         }
 650         }
 651
 652         c->state |= CONFIG_LOCKED;
 653         p_dev->_locked = 1;
 654         return CS_SUCCESS;
 655 } /* pcmcia_request_configuration */
 656 EXPORT_SYMBOL(pcmcia_request_configuration);
 657
 658
 659 /** pcmcia_request_io
 660  *
 661  * Request_io() reserves ranges of port addresses for a socket.
 662  * I have not implemented range sharing or alias addressing.
 663  */
 664 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 665 {
 666         struct pcmcia_socket *s = p_dev->socket;
 667         config_t *c;
 668
 669         if (!(s->state & SOCKET_PRESENT))
 670                 return CS_NO_CARD;
 671
 672         if (!req)
 673                 return CS_UNSUPPORTED_MODE;
 674         c = p_dev->function_config;
 675         if (c->state & CONFIG_LOCKED)
 676                 return CS_CONFIGURATION_LOCKED;
 677         if (c->state & CONFIG_IO_REQ)
 678                 return CS_IN_USE;
 679         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 680                 return CS_BAD_ATTRIBUTE;
 681         if ((req->NumPorts2 > 0) &&
 682             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 683                 return CS_BAD_ATTRIBUTE;
 684
 685         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 686                            req->NumPorts1, req->IOAddrLines))
 687                 return CS_IN_USE;
 688
 689         if (req->NumPorts2) {
 690                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 691                                    req->NumPorts2, req->IOAddrLines)) {
 692                         release_io_space(s, req->BasePort1, req->NumPorts1);
 693                         return CS_IN_USE;
 694                 }
 695         }
 696
 697         c->io = *req;
 698         c->state |= CONFIG_IO_REQ;
 699         p_dev->_io = 1;
 700         return CS_SUCCESS;
 701 } /* pcmcia_request_io */
 702 EXPORT_SYMBOL(pcmcia_request_io);
 703
 704
 705 /** pcmcia_request_irq
 706  *
 707  * Request_irq() reserves an irq for this client.
 708  *
 709  * Also, since Linux only reserves irq's when they are actually
 710  * hooked, we don't guarantee that an irq will still be available
 711  * when the configuration is locked.  Now that I think about it,
 712  * there might be a way to fix this using a dummy handler.
 713  */
 714
 715 #ifdef CONFIG_PCMCIA_PROBE
 716 static irqreturn_t test_action(int cpl, void *dev_id)
 717 {
 718         return IRQ_NONE;
 719 }
 720 #endif
 721
 722 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 723 {
 724         struct pcmcia_socket *s = p_dev->socket;
 725         config_t *c;
 726         int ret = CS_IN_USE, irq = 0;
 727         int type;
 728
 729         if (!(s->state & SOCKET_PRESENT))
 730                 return CS_NO_CARD;
 731         c = p_dev->function_config;
 732         if (c->state & CONFIG_LOCKED)
 733                 return CS_CONFIGURATION_LOCKED;
 734         if (c->state & CONFIG_IRQ_REQ)
 735                 return CS_IN_USE;
 736
 737         /* Decide what type of interrupt we are registering */
 738         type = 0;
 739         if (s->functions > 1)           /* All of this ought to be handled higher up */
 740                 type = IRQF_SHARED;
 741         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 742                 type = IRQF_SHARED;
 743
 744 #ifdef CONFIG_PCMCIA_PROBE
 745
 746 #ifdef IRQ_NOAUTOEN
 747         /* if the underlying IRQ infrastructure allows for it, only allocate
 748          * the IRQ, but do not enable it
 749          */
 750         if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 751                 type |= IRQ_NOAUTOEN;
 752 #endif /* IRQ_NOAUTOEN */
 753
 754         if (s->irq.AssignedIRQ != 0) {
 755                 /* If the interrupt is already assigned, it must be the same */
 756                 irq = s->irq.AssignedIRQ;
 757         } else {
 758                 int try;
 759                 u32 mask = s->irq_mask;
 760                 void *data = &p_dev->dev.driver; /* something unique to this device */
 761
 762                 for (try = 0; try < 64; try++) {
 763                         irq = try % 32;
 764
 765                         /* marked as available by driver, and not blocked by userspace? */
 766                         if (!((mask >> irq) & 1))
 767                                 continue;
 768
 769                         /* avoid an IRQ which is already used by a PCMCIA card */
 770                         if ((try < 32) && pcmcia_used_irq[irq])
 771                                 continue;
 772
 773                         /* register the correct driver, if possible, of check whether
 774                          * registering a dummy handle works, i.e. if the IRQ isn't
 775                          * marked as used by the kernel resource management core */
 776                         ret = request_irq(irq,
 777                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 778                                           type,
 779                                           p_dev->devname,
 780                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 781                         if (!ret) {
 782                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 783                                         free_irq(irq, data);
 784                                 break;
 785                         }
 786                 }
 787         }
 788 #endif
 789         /* only assign PCI irq if no IRQ already assigned */
 790         if (ret && !s->irq.AssignedIRQ) {
 791                 if (!s->pci_irq)
 792                         return ret;
 793                 type = IRQF_SHARED;
 794                 irq = s->pci_irq;
 795         }
 796
 797         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 798                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 799                         return CS_IN_USE;
 800         }
 801
 802         /* Make sure the fact the request type was overridden is passed back */
 803         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 804                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 805                 printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
 806                 printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n");
 807         }
 808         c->irq.Attributes = req->Attributes;
 809         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 810         s->irq.Config++;
 811
 812         c->state |= CONFIG_IRQ_REQ;
 813         p_dev->_irq = 1;
 814
 815 #ifdef CONFIG_PCMCIA_PROBE
 816         pcmcia_used_irq[irq]++;
 817 #endif
 818
 819         return CS_SUCCESS;
 820 } /* pcmcia_request_irq */
 821 EXPORT_SYMBOL(pcmcia_request_irq);
 822
 823
 824 /** pcmcia_request_window
 825  *
 826  * Request_window() establishes a mapping between card memory space
 827  * and system memory space.
 828  */
 829 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 830 {
 831         struct pcmcia_socket *s = (*p_dev)->socket;
 832         window_t *win;
 833         u_long align;
 834         int w;
 835
 836         if (!(s->state & SOCKET_PRESENT))
 837                 return CS_NO_CARD;
 838         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 839                 return CS_BAD_ATTRIBUTE;
 840
 841         /* Window size defaults to smallest available */
 842         if (req->Size == 0)
 843                 req->Size = s->map_size;
 844         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 845                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 846                  req->Size : s->map_size);
 847         if (req->Size & (s->map_size-1))
 848                 return CS_BAD_SIZE;
 849         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 850             (req->Base & (align-1)))
 851                 return CS_BAD_BASE;
 852         if (req->Base)
 853                 align = 0;
 854
 855         /* Allocate system memory window */
 856         for (w = 0; w < MAX_WIN; w++)
 857                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 858         if (w == MAX_WIN)
 859                 return CS_OUT_OF_RESOURCE;
 860
 861         win = &s->win[w];
 862         win->magic = WINDOW_MAGIC;
 863         win->index = w;
 864         win->handle = *p_dev;
 865         win->sock = s;
 866
 867         if (!(s->features & SS_CAP_STATIC_MAP)) {
 868                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 869                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 870                 if (!win->ctl.res)
 871                         return CS_IN_USE;
 872         }
 873         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 874
 875         /* Configure the socket controller */
 876         win->ctl.map = w+1;
 877         win->ctl.flags = 0;
 878         win->ctl.speed = req->AccessSpeed;
 879         if (req->Attributes & WIN_MEMORY_TYPE)
 880                 win->ctl.flags |= MAP_ATTRIB;
 881         if (req->Attributes & WIN_ENABLE)
 882                 win->ctl.flags |= MAP_ACTIVE;
 883         if (req->Attributes & WIN_DATA_WIDTH_16)
 884                 win->ctl.flags |= MAP_16BIT;
 885         if (req->Attributes & WIN_USE_WAIT)
 886                 win->ctl.flags |= MAP_USE_WAIT;
 887         win->ctl.card_start = 0;
 888         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 889                 return CS_BAD_ARGS;
 890         s->state |= SOCKET_WIN_REQ(w);
 891
 892         /* Return window handle */
 893         if (s->features & SS_CAP_STATIC_MAP) {
 894                 req->Base = win->ctl.static_start;
 895         } else {
 896                 req->Base = win->ctl.res->start;
 897         }
 898         *wh = win;
 899
 900         return CS_SUCCESS;
 901 } /* pcmcia_request_window */
 902 EXPORT_SYMBOL(pcmcia_request_window);
 903
 904 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 905         pcmcia_release_configuration(p_dev);
 906         pcmcia_release_io(p_dev, &p_dev->io);
 907         pcmcia_release_irq(p_dev, &p_dev->irq);
 908         if (p_dev->win)
 909                 pcmcia_release_window(p_dev->win);
 910 }
 911 EXPORT_SYMBOL(pcmcia_disable_device);