SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 CONFIG_PCMCIA_DEBUG
  48 extern int ds_pc_debug;
  49
  50 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  51         if (ds_pc_debug >= lvl)                                 \
  52                 dev_printk(KERN_DEBUG, &skt->dev,               \
  53                            "pcmcia_resource: " fmt,             \
  54                            ## arg);                             \
  55 } while (0)
  56 #else
  57 #define ds_dbg(skt, lvl, fmt, arg...) do { } while (0)
  58 #endif
  59
  60
  61
  62 /** alloc_io_space
  63  *
  64  * Special stuff for managing IO windows, because they are scarce
  65  */
  66
  67 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
  68                           unsigned int *base, unsigned int num, u_int lines)
  69 {
  70         int i;
  71         unsigned int try, align;
  72
  73         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  74         if (align && (align < num)) {
  75                 if (*base) {
  76                         ds_dbg(s, 0, "odd IO request: num %#x align %#x\n",
  77                                num, align);
  78                         align = 0;
  79                 } else
  80                         while (align && (align < num)) align <<= 1;
  81         }
  82         if (*base & ~(align-1)) {
  83                 ds_dbg(s, 0, "odd IO request: base %#x align %#x\n",
  84                        *base, align);
  85                 align = 0;
  86         }
  87         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  88                 *base = s->io_offset | (*base & 0x0fff);
  89                 return 0;
  90         }
  91         /* Check for an already-allocated window that must conflict with
  92          * what was asked for.  It is a hack because it does not catch all
  93          * potential conflicts, just the most obvious ones.
  94          */
  95         for (i = 0; i < MAX_IO_WIN; i++)
  96                 if ((s->io[i].res) && *base &&
  97                     ((s->io[i].res->start & (align-1)) == *base))
  98                         return 1;
  99         for (i = 0; i < MAX_IO_WIN; i++) {
 100                 if (!s->io[i].res) {
 101                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 102                         if (s->io[i].res) {
 103                                 *base = s->io[i].res->start;
 104                                 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
 105                                 s->io[i].InUse = num;
 106                                 break;
 107                         } else
 108                                 return 1;
 109                 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
 110                         continue;
 111                 /* Try to extend top of window */
 112                 try = s->io[i].res->end + 1;
 113                 if ((*base == 0) || (*base == try))
 114                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 115                                                     s->io[i].res->end + num, s) == 0) {
 116                                 *base = try;
 117                                 s->io[i].InUse += num;
 118                                 break;
 119                         }
 120                 /* Try to extend bottom of window */
 121                 try = s->io[i].res->start - num;
 122                 if ((*base == 0) || (*base == try))
 123                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 124                                                     s->io[i].res->end, s) == 0) {
 125                                 *base = try;
 126                                 s->io[i].InUse += num;
 127                                 break;
 128                         }
 129         }
 130         return (i == MAX_IO_WIN);
 131 } /* alloc_io_space */
 132
 133
 134 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
 135                              unsigned int num)
 136 {
 137         int i;
 138
 139         for (i = 0; i < MAX_IO_WIN; i++) {
 140                 if (!s->io[i].res)
 141                         continue;
 142                 if ((s->io[i].res->start <= base) &&
 143                     (s->io[i].res->end >= base+num-1)) {
 144                         s->io[i].InUse -= num;
 145                         /* Free the window if no one else is using it */
 146                         if (s->io[i].InUse == 0) {
 147                                 release_resource(s->io[i].res);
 148                                 kfree(s->io[i].res);
 149                                 s->io[i].res = NULL;
 150                         }
 151                 }
 152         }
 153 } /* release_io_space */
 154
 155
 156 /** pccard_access_configuration_register
 157  *
 158  * Access_configuration_register() reads and writes configuration
 159  * registers in attribute memory.  Memory window 0 is reserved for
 160  * this and the tuple reading services.
 161  */
 162
 163 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
 164                                          conf_reg_t *reg)
 165 {
 166         struct pcmcia_socket *s;
 167         config_t *c;
 168         int addr;
 169         u_char val;
 170
 171         if (!p_dev || !p_dev->function_config)
 172                 return CS_NO_CARD;
 173
 174         s = p_dev->socket;
 175         c = p_dev->function_config;
 176
 177         if (!(c->state & CONFIG_LOCKED))
 178                 return CS_CONFIGURATION_LOCKED;
 179
 180         addr = (c->ConfigBase + reg->Offset) >> 1;
 181
 182         switch (reg->Action) {
 183         case CS_READ:
 184                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 185                 reg->Value = val;
 186                 break;
 187         case CS_WRITE:
 188                 val = reg->Value;
 189                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 190                 break;
 191         default:
 192                 return CS_BAD_ARGS;
 193                 break;
 194         }
 195         return CS_SUCCESS;
 196 } /* pcmcia_access_configuration_register */
 197 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 198
 199
 200 int pccard_get_configuration_info(struct pcmcia_socket *s,
 201                                   struct pcmcia_device *p_dev,
 202                                   config_info_t *config)
 203 {
 204         config_t *c;
 205
 206         if (!(s->state & SOCKET_PRESENT))
 207                 return CS_NO_CARD;
 208
 209
 210 #ifdef CONFIG_CARDBUS
 211         if (s->state & SOCKET_CARDBUS) {
 212                 memset(config, 0, sizeof(config_info_t));
 213                 config->Vcc = s->socket.Vcc;
 214                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 215                 config->Option = s->cb_dev->subordinate->number;
 216                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 217                         config->Attributes = CONF_VALID_CLIENT;
 218                         config->IntType = INT_CARDBUS;
 219                         config->AssignedIRQ = s->irq.AssignedIRQ;
 220                         if (config->AssignedIRQ)
 221                                 config->Attributes |= CONF_ENABLE_IRQ;
 222                         if (s->io[0].res) {
 223                                 config->BasePort1 = s->io[0].res->start;
 224                                 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
 225                         }
 226                 }
 227                 return CS_SUCCESS;
 228         }
 229 #endif
 230
 231         if (p_dev) {
 232                 c = p_dev->function_config;
 233                 config->Function = p_dev->func;
 234         } else {
 235                 c = NULL;
 236                 config->Function = 0;
 237         }
 238
 239         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 240                 config->Attributes = 0;
 241                 config->Vcc = s->socket.Vcc;
 242                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 243                 return CS_SUCCESS;
 244         }
 245
 246         config->Attributes = c->Attributes | CONF_VALID_CLIENT;
 247         config->Vcc = s->socket.Vcc;
 248         config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 249         config->IntType = c->IntType;
 250         config->ConfigBase = c->ConfigBase;
 251         config->Status = c->Status;
 252         config->Pin = c->Pin;
 253         config->Copy = c->Copy;
 254         config->Option = c->Option;
 255         config->ExtStatus = c->ExtStatus;
 256         config->Present = config->CardValues = c->CardValues;
 257         config->IRQAttributes = c->irq.Attributes;
 258         config->AssignedIRQ = s->irq.AssignedIRQ;
 259         config->BasePort1 = c->io.BasePort1;
 260         config->NumPorts1 = c->io.NumPorts1;
 261         config->Attributes1 = c->io.Attributes1;
 262         config->BasePort2 = c->io.BasePort2;
 263         config->NumPorts2 = c->io.NumPorts2;
 264         config->Attributes2 = c->io.Attributes2;
 265         config->IOAddrLines = c->io.IOAddrLines;
 266
 267         return CS_SUCCESS;
 268 } /* pccard_get_configuration_info */
 269
 270 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 271                                   config_info_t *config)
 272 {
 273         return pccard_get_configuration_info(p_dev->socket, p_dev,
 274                                              config);
 275 }
 276 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 277
 278
 279 /** pcmcia_get_window
 280  */
 281 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 282                       int idx, win_req_t *req)
 283 {
 284         window_t *win;
 285         int w;
 286
 287         if (!s || !(s->state & SOCKET_PRESENT))
 288                 return CS_NO_CARD;
 289         for (w = idx; w < MAX_WIN; w++)
 290                 if (s->state & SOCKET_WIN_REQ(w))
 291                         break;
 292         if (w == MAX_WIN)
 293                 return CS_NO_MORE_ITEMS;
 294         win = &s->win[w];
 295         req->Base = win->ctl.res->start;
 296         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 297         req->AccessSpeed = win->ctl.speed;
 298         req->Attributes = 0;
 299         if (win->ctl.flags & MAP_ATTRIB)
 300                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 301         if (win->ctl.flags & MAP_ACTIVE)
 302                 req->Attributes |= WIN_ENABLE;
 303         if (win->ctl.flags & MAP_16BIT)
 304                 req->Attributes |= WIN_DATA_WIDTH_16;
 305         if (win->ctl.flags & MAP_USE_WAIT)
 306                 req->Attributes |= WIN_USE_WAIT;
 307         *handle = win;
 308         return CS_SUCCESS;
 309 } /* pcmcia_get_window */
 310 EXPORT_SYMBOL(pcmcia_get_window);
 311
 312
 313 /** pcmcia_get_mem_page
 314  *
 315  * Change the card address of an already open memory window.
 316  */
 317 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 318 {
 319         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 320                 return CS_BAD_HANDLE;
 321         req->Page = 0;
 322         req->CardOffset = win->ctl.card_start;
 323         return CS_SUCCESS;
 324 } /* pcmcia_get_mem_page */
 325 EXPORT_SYMBOL(pcmcia_get_mem_page);
 326
 327
 328 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 329 {
 330         struct pcmcia_socket *s;
 331         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 332                 return CS_BAD_HANDLE;
 333         if (req->Page != 0)
 334                 return CS_BAD_PAGE;
 335         s = win->sock;
 336         win->ctl.card_start = req->CardOffset;
 337         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 338                 return CS_BAD_OFFSET;
 339         return CS_SUCCESS;
 340 } /* pcmcia_map_mem_page */
 341 EXPORT_SYMBOL(pcmcia_map_mem_page);
 342
 343
 344 /** pcmcia_modify_configuration
 345  *
 346  * Modify a locked socket configuration
 347  */
 348 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 349                                 modconf_t *mod)
 350 {
 351         struct pcmcia_socket *s;
 352         config_t *c;
 353
 354         s = p_dev->socket;
 355         c = p_dev->function_config;
 356
 357         if (!(s->state & SOCKET_PRESENT))
 358                 return CS_NO_CARD;
 359         if (!(c->state & CONFIG_LOCKED))
 360                 return CS_CONFIGURATION_LOCKED;
 361
 362         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 363                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 364                         c->Attributes |= CONF_ENABLE_IRQ;
 365                         s->socket.io_irq = s->irq.AssignedIRQ;
 366                 } else {
 367                         c->Attributes &= ~CONF_ENABLE_IRQ;
 368                         s->socket.io_irq = 0;
 369                 }
 370                 s->ops->set_socket(s, &s->socket);
 371         }
 372
 373         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 374                 return CS_BAD_VCC;
 375
 376         /* We only allow changing Vpp1 and Vpp2 to the same value */
 377         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 378             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 379                 if (mod->Vpp1 != mod->Vpp2)
 380                         return CS_BAD_VPP;
 381                 s->socket.Vpp = mod->Vpp1;
 382                 if (s->ops->set_socket(s, &s->socket))
 383                         return CS_BAD_VPP;
 384         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 385                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 386                 return CS_BAD_VPP;
 387
 388         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 389                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 390                 pccard_io_map io_on;
 391                 int i;
 392
 393                 io_on.speed = io_speed;
 394                 for (i = 0; i < MAX_IO_WIN; i++) {
 395                         if (!s->io[i].res)
 396                                 continue;
 397                         io_off.map = i;
 398                         io_on.map = i;
 399
 400                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 401                         io_on.start = s->io[i].res->start;
 402                         io_on.stop = s->io[i].res->end;
 403
 404                         s->ops->set_io_map(s, &io_off);
 405                         mdelay(40);
 406                         s->ops->set_io_map(s, &io_on);
 407                 }
 408         }
 409
 410         return CS_SUCCESS;
 411 } /* modify_configuration */
 412 EXPORT_SYMBOL(pcmcia_modify_configuration);
 413
 414
 415 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 416 {
 417         pccard_io_map io = { 0, 0, 0, 0, 1 };
 418         struct pcmcia_socket *s = p_dev->socket;
 419         config_t *c = p_dev->function_config;
 420         int i;
 421
 422         if (p_dev->_locked) {
 423                 p_dev->_locked = 0;
 424                 if (--(s->lock_count) == 0) {
 425                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 426                         s->socket.Vpp = 0;
 427                         s->socket.io_irq = 0;
 428                         s->ops->set_socket(s, &s->socket);
 429                 }
 430         }
 431         if (c->state & CONFIG_LOCKED) {
 432                 c->state &= ~CONFIG_LOCKED;
 433                 if (c->state & CONFIG_IO_REQ)
 434                         for (i = 0; i < MAX_IO_WIN; i++) {
 435                                 if (!s->io[i].res)
 436                                         continue;
 437                                 s->io[i].Config--;
 438                                 if (s->io[i].Config != 0)
 439                                         continue;
 440                                 io.map = i;
 441                                 s->ops->set_io_map(s, &io);
 442                         }
 443         }
 444
 445         return CS_SUCCESS;
 446 } /* pcmcia_release_configuration */
 447
 448
 449 /** pcmcia_release_io
 450  *
 451  * Release_io() releases the I/O ranges allocated by a client.  This
 452  * may be invoked some time after a card ejection has already dumped
 453  * the actual socket configuration, so if the client is "stale", we
 454  * don't bother checking the port ranges against the current socket
 455  * values.
 456  */
 457 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 458 {
 459         struct pcmcia_socket *s = p_dev->socket;
 460         config_t *c = p_dev->function_config;
 461
 462         if (!p_dev->_io )
 463                 return CS_BAD_HANDLE;
 464
 465         p_dev->_io = 0;
 466
 467         if ((c->io.BasePort1 != req->BasePort1) ||
 468             (c->io.NumPorts1 != req->NumPorts1) ||
 469             (c->io.BasePort2 != req->BasePort2) ||
 470             (c->io.NumPorts2 != req->NumPorts2))
 471                 return CS_BAD_ARGS;
 472
 473         c->state &= ~CONFIG_IO_REQ;
 474
 475         release_io_space(s, req->BasePort1, req->NumPorts1);
 476         if (req->NumPorts2)
 477                 release_io_space(s, req->BasePort2, req->NumPorts2);
 478
 479         return CS_SUCCESS;
 480 } /* pcmcia_release_io */
 481
 482
 483 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 484 {
 485         struct pcmcia_socket *s = p_dev->socket;
 486         config_t *c= p_dev->function_config;
 487
 488         if (!p_dev->_irq)
 489                 return CS_BAD_HANDLE;
 490         p_dev->_irq = 0;
 491
 492         if (c->state & CONFIG_LOCKED)
 493                 return CS_CONFIGURATION_LOCKED;
 494         if (c->irq.Attributes != req->Attributes)
 495                 return CS_BAD_ATTRIBUTE;
 496         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 497                 return CS_BAD_IRQ;
 498         if (--s->irq.Config == 0) {
 499                 c->state &= ~CONFIG_IRQ_REQ;
 500                 s->irq.AssignedIRQ = 0;
 501         }
 502
 503         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 504                 free_irq(req->AssignedIRQ, req->Instance);
 505         }
 506
 507 #ifdef CONFIG_PCMCIA_PROBE
 508         pcmcia_used_irq[req->AssignedIRQ]--;
 509 #endif
 510
 511         return CS_SUCCESS;
 512 } /* pcmcia_release_irq */
 513
 514
 515 int pcmcia_release_window(window_handle_t win)
 516 {
 517         struct pcmcia_socket *s;
 518
 519         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 520                 return CS_BAD_HANDLE;
 521         s = win->sock;
 522         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 523                 return CS_BAD_HANDLE;
 524
 525         /* Shut down memory window */
 526         win->ctl.flags &= ~MAP_ACTIVE;
 527         s->ops->set_mem_map(s, &win->ctl);
 528         s->state &= ~SOCKET_WIN_REQ(win->index);
 529
 530         /* Release system memory */
 531         if (win->ctl.res) {
 532                 release_resource(win->ctl.res);
 533                 kfree(win->ctl.res);
 534                 win->ctl.res = NULL;
 535         }
 536         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 537
 538         win->magic = 0;
 539
 540         return CS_SUCCESS;
 541 } /* pcmcia_release_window */
 542 EXPORT_SYMBOL(pcmcia_release_window);
 543
 544
 545 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 546                                  config_req_t *req)
 547 {
 548         int i;
 549         u_int base;
 550         struct pcmcia_socket *s = p_dev->socket;
 551         config_t *c;
 552         pccard_io_map iomap;
 553
 554         if (!(s->state & SOCKET_PRESENT))
 555                 return CS_NO_CARD;
 556
 557         if (req->IntType & INT_CARDBUS)
 558                 return CS_UNSUPPORTED_MODE;
 559         c = p_dev->function_config;
 560         if (c->state & CONFIG_LOCKED)
 561                 return CS_CONFIGURATION_LOCKED;
 562
 563         /* Do power control.  We don't allow changes in Vcc. */
 564         s->socket.Vpp = req->Vpp;
 565         if (s->ops->set_socket(s, &s->socket))
 566                 return CS_BAD_VPP;
 567
 568         /* Pick memory or I/O card, DMA mode, interrupt */
 569         c->IntType = req->IntType;
 570         c->Attributes = req->Attributes;
 571         if (req->IntType & INT_MEMORY_AND_IO)
 572                 s->socket.flags |= SS_IOCARD;
 573         if (req->IntType & INT_ZOOMED_VIDEO)
 574                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 575         if (req->Attributes & CONF_ENABLE_DMA)
 576                 s->socket.flags |= SS_DMA_MODE;
 577         if (req->Attributes & CONF_ENABLE_SPKR)
 578                 s->socket.flags |= SS_SPKR_ENA;
 579         if (req->Attributes & CONF_ENABLE_IRQ)
 580                 s->socket.io_irq = s->irq.AssignedIRQ;
 581         else
 582                 s->socket.io_irq = 0;
 583         s->ops->set_socket(s, &s->socket);
 584         s->lock_count++;
 585
 586         /* Set up CIS configuration registers */
 587         base = c->ConfigBase = req->ConfigBase;
 588         c->CardValues = req->Present;
 589         if (req->Present & PRESENT_COPY) {
 590                 c->Copy = req->Copy;
 591                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 592         }
 593         if (req->Present & PRESENT_OPTION) {
 594                 if (s->functions == 1) {
 595                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 596                 } else {
 597                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 598                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 599                         if (req->Present & PRESENT_IOBASE_0)
 600                                 c->Option |= COR_ADDR_DECODE;
 601                 }
 602                 if (c->state & CONFIG_IRQ_REQ)
 603                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 604                                 c->Option |= COR_LEVEL_REQ;
 605                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 606                 mdelay(40);
 607         }
 608         if (req->Present & PRESENT_STATUS) {
 609                 c->Status = req->Status;
 610                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 611         }
 612         if (req->Present & PRESENT_PIN_REPLACE) {
 613                 c->Pin = req->Pin;
 614                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 615         }
 616         if (req->Present & PRESENT_EXT_STATUS) {
 617                 c->ExtStatus = req->ExtStatus;
 618                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 619         }
 620         if (req->Present & PRESENT_IOBASE_0) {
 621                 u_char b = c->io.BasePort1 & 0xff;
 622                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 623                 b = (c->io.BasePort1 >> 8) & 0xff;
 624                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 625         }
 626         if (req->Present & PRESENT_IOSIZE) {
 627                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 628                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 629         }
 630
 631         /* Configure I/O windows */
 632         if (c->state & CONFIG_IO_REQ) {
 633                 iomap.speed = io_speed;
 634                 for (i = 0; i < MAX_IO_WIN; i++)
 635                         if (s->io[i].res) {
 636                                 iomap.map = i;
 637                                 iomap.flags = MAP_ACTIVE;
 638                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 639                                 case IO_DATA_PATH_WIDTH_16:
 640                                         iomap.flags |= MAP_16BIT; break;
 641                                 case IO_DATA_PATH_WIDTH_AUTO:
 642                                         iomap.flags |= MAP_AUTOSZ; break;
 643                                 default:
 644                                         break;
 645                                 }
 646                                 iomap.start = s->io[i].res->start;
 647                                 iomap.stop = s->io[i].res->end;
 648                                 s->ops->set_io_map(s, &iomap);
 649                                 s->io[i].Config++;
 650                         }
 651         }
 652
 653         c->state |= CONFIG_LOCKED;
 654         p_dev->_locked = 1;
 655         return CS_SUCCESS;
 656 } /* pcmcia_request_configuration */
 657 EXPORT_SYMBOL(pcmcia_request_configuration);
 658
 659
 660 /** pcmcia_request_io
 661  *
 662  * Request_io() reserves ranges of port addresses for a socket.
 663  * I have not implemented range sharing or alias addressing.
 664  */
 665 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 666 {
 667         struct pcmcia_socket *s = p_dev->socket;
 668         config_t *c;
 669
 670         if (!(s->state & SOCKET_PRESENT))
 671                 return CS_NO_CARD;
 672
 673         if (!req)
 674                 return CS_UNSUPPORTED_MODE;
 675         c = p_dev->function_config;
 676         if (c->state & CONFIG_LOCKED)
 677                 return CS_CONFIGURATION_LOCKED;
 678         if (c->state & CONFIG_IO_REQ)
 679                 return CS_IN_USE;
 680         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 681                 return CS_BAD_ATTRIBUTE;
 682         if ((req->NumPorts2 > 0) &&
 683             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 684                 return CS_BAD_ATTRIBUTE;
 685
 686         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 687                            req->NumPorts1, req->IOAddrLines))
 688                 return CS_IN_USE;
 689
 690         if (req->NumPorts2) {
 691                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 692                                    req->NumPorts2, req->IOAddrLines)) {
 693                         release_io_space(s, req->BasePort1, req->NumPorts1);
 694                         return CS_IN_USE;
 695                 }
 696         }
 697
 698         c->io = *req;
 699         c->state |= CONFIG_IO_REQ;
 700         p_dev->_io = 1;
 701         return CS_SUCCESS;
 702 } /* pcmcia_request_io */
 703 EXPORT_SYMBOL(pcmcia_request_io);
 704
 705
 706 /** pcmcia_request_irq
 707  *
 708  * Request_irq() reserves an irq for this client.
 709  *
 710  * Also, since Linux only reserves irq's when they are actually
 711  * hooked, we don't guarantee that an irq will still be available
 712  * when the configuration is locked.  Now that I think about it,
 713  * there might be a way to fix this using a dummy handler.
 714  */
 715
 716 #ifdef CONFIG_PCMCIA_PROBE
 717 static irqreturn_t test_action(int cpl, void *dev_id)
 718 {
 719         return IRQ_NONE;
 720 }
 721 #endif
 722
 723 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 724 {
 725         struct pcmcia_socket *s = p_dev->socket;
 726         config_t *c;
 727         int ret = CS_IN_USE, irq = 0;
 728         int type;
 729
 730         if (!(s->state & SOCKET_PRESENT))
 731                 return CS_NO_CARD;
 732         c = p_dev->function_config;
 733         if (c->state & CONFIG_LOCKED)
 734                 return CS_CONFIGURATION_LOCKED;
 735         if (c->state & CONFIG_IRQ_REQ)
 736                 return CS_IN_USE;
 737
 738         /* Decide what type of interrupt we are registering */
 739         type = 0;
 740         if (s->functions > 1)           /* All of this ought to be handled higher up */
 741                 type = IRQF_SHARED;
 742         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 743                 type = IRQF_SHARED;
 744
 745 #ifdef CONFIG_PCMCIA_PROBE
 746
 747 #ifdef IRQ_NOAUTOEN
 748         /* if the underlying IRQ infrastructure allows for it, only allocate
 749          * the IRQ, but do not enable it
 750          */
 751         if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 752                 type |= IRQ_NOAUTOEN;
 753 #endif /* IRQ_NOAUTOEN */
 754
 755         if (s->irq.AssignedIRQ != 0) {
 756                 /* If the interrupt is already assigned, it must be the same */
 757                 irq = s->irq.AssignedIRQ;
 758         } else {
 759                 int try;
 760                 u32 mask = s->irq_mask;
 761                 void *data = &p_dev->dev.driver; /* something unique to this device */
 762
 763                 for (try = 0; try < 64; try++) {
 764                         irq = try % 32;
 765
 766                         /* marked as available by driver, and not blocked by userspace? */
 767                         if (!((mask >> irq) & 1))
 768                                 continue;
 769
 770                         /* avoid an IRQ which is already used by a PCMCIA card */
 771                         if ((try < 32) && pcmcia_used_irq[irq])
 772                                 continue;
 773
 774                         /* register the correct driver, if possible, of check whether
 775                          * registering a dummy handle works, i.e. if the IRQ isn't
 776                          * marked as used by the kernel resource management core */
 777                         ret = request_irq(irq,
 778                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 779                                           type,
 780                                           p_dev->devname,
 781                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 782                         if (!ret) {
 783                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 784                                         free_irq(irq, data);
 785                                 break;
 786                         }
 787                 }
 788         }
 789 #endif
 790         /* only assign PCI irq if no IRQ already assigned */
 791         if (ret && !s->irq.AssignedIRQ) {
 792                 if (!s->pci_irq)
 793                         return ret;
 794                 type = IRQF_SHARED;
 795                 irq = s->pci_irq;
 796         }
 797
 798         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 799                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 800                         return CS_IN_USE;
 801         }
 802
 803         /* Make sure the fact the request type was overridden is passed back */
 804         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 805                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 806                 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
 807                         "request for exclusive IRQ could not be fulfilled.\n");
 808                 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
 809                         "needs updating to supported shared IRQ lines.\n");
 810         }
 811         c->irq.Attributes = req->Attributes;
 812         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 813         s->irq.Config++;
 814
 815         c->state |= CONFIG_IRQ_REQ;
 816         p_dev->_irq = 1;
 817
 818 #ifdef CONFIG_PCMCIA_PROBE
 819         pcmcia_used_irq[irq]++;
 820 #endif
 821
 822         return CS_SUCCESS;
 823 } /* pcmcia_request_irq */
 824 EXPORT_SYMBOL(pcmcia_request_irq);
 825
 826
 827 /** pcmcia_request_window
 828  *
 829  * Request_window() establishes a mapping between card memory space
 830  * and system memory space.
 831  */
 832 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 833 {
 834         struct pcmcia_socket *s = (*p_dev)->socket;
 835         window_t *win;
 836         u_long align;
 837         int w;
 838
 839         if (!(s->state & SOCKET_PRESENT))
 840                 return CS_NO_CARD;
 841         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 842                 return CS_BAD_ATTRIBUTE;
 843
 844         /* Window size defaults to smallest available */
 845         if (req->Size == 0)
 846                 req->Size = s->map_size;
 847         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 848                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 849                  req->Size : s->map_size);
 850         if (req->Size & (s->map_size-1))
 851                 return CS_BAD_SIZE;
 852         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 853             (req->Base & (align-1)))
 854                 return CS_BAD_BASE;
 855         if (req->Base)
 856                 align = 0;
 857
 858         /* Allocate system memory window */
 859         for (w = 0; w < MAX_WIN; w++)
 860                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 861         if (w == MAX_WIN)
 862                 return CS_OUT_OF_RESOURCE;
 863
 864         win = &s->win[w];
 865         win->magic = WINDOW_MAGIC;
 866         win->index = w;
 867         win->handle = *p_dev;
 868         win->sock = s;
 869
 870         if (!(s->features & SS_CAP_STATIC_MAP)) {
 871                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 872                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 873                 if (!win->ctl.res)
 874                         return CS_IN_USE;
 875         }
 876         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 877
 878         /* Configure the socket controller */
 879         win->ctl.map = w+1;
 880         win->ctl.flags = 0;
 881         win->ctl.speed = req->AccessSpeed;
 882         if (req->Attributes & WIN_MEMORY_TYPE)
 883                 win->ctl.flags |= MAP_ATTRIB;
 884         if (req->Attributes & WIN_ENABLE)
 885                 win->ctl.flags |= MAP_ACTIVE;
 886         if (req->Attributes & WIN_DATA_WIDTH_16)
 887                 win->ctl.flags |= MAP_16BIT;
 888         if (req->Attributes & WIN_USE_WAIT)
 889                 win->ctl.flags |= MAP_USE_WAIT;
 890         win->ctl.card_start = 0;
 891         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 892                 return CS_BAD_ARGS;
 893         s->state |= SOCKET_WIN_REQ(w);
 894
 895         /* Return window handle */
 896         if (s->features & SS_CAP_STATIC_MAP) {
 897                 req->Base = win->ctl.static_start;
 898         } else {
 899                 req->Base = win->ctl.res->start;
 900         }
 901         *wh = win;
 902
 903         return CS_SUCCESS;
 904 } /* pcmcia_request_window */
 905 EXPORT_SYMBOL(pcmcia_request_window);
 906
 907 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 908         pcmcia_release_configuration(p_dev);
 909         pcmcia_release_io(p_dev, &p_dev->io);
 910         pcmcia_release_irq(p_dev, &p_dev->irq);
 911         if (p_dev->win)
 912                 pcmcia_release_window(p_dev->win);
 913 }
 914 EXPORT_SYMBOL(pcmcia_disable_device);
 915
 916
 917 struct pcmcia_cfg_mem {
 918         tuple_t tuple;
 919         cisparse_t parse;
 920         u8 buf[256];
 921         cistpl_cftable_entry_t dflt;
 922 };
 923
 924 /**
 925  * pcmcia_loop_config() - loop over configuration options
 926  * @p_dev:      the struct pcmcia_device which we need to loop for.
 927  * @conf_check: function to call for each configuration option.
 928  *              It gets passed the struct pcmcia_device, the CIS data
 929  *              describing the configuration option, and private data
 930  *              being passed to pcmcia_loop_config()
 931  * @priv_data:  private data to be passed to the conf_check function.
 932  *
 933  * pcmcia_loop_config() loops over all configuration options, and calls
 934  * the driver-specific conf_check() for each one, checking whether
 935  * it is a valid one.
 936  */
 937 int pcmcia_loop_config(struct pcmcia_device *p_dev,
 938                        int      (*conf_check)   (struct pcmcia_device *p_dev,
 939                                                  cistpl_cftable_entry_t *cfg,
 940                                                  cistpl_cftable_entry_t *dflt,
 941                                                  unsigned int vcc,
 942                                                  void *priv_data),
 943                        void *priv_data)
 944 {
 945         struct pcmcia_cfg_mem *cfg_mem;
 946
 947         tuple_t *tuple;
 948         int ret = -ENODEV;
 949         unsigned int vcc;
 950
 951         cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
 952         if (cfg_mem == NULL)
 953                 return -ENOMEM;
 954
 955         /* get the current Vcc setting */
 956         vcc = p_dev->socket->socket.Vcc;
 957
 958         tuple = &cfg_mem->tuple;
 959         tuple->TupleData = cfg_mem->buf;
 960         tuple->TupleDataMax = 255;
 961         tuple->TupleOffset = 0;
 962         tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY;
 963         tuple->Attributes = 0;
 964
 965         ret = pcmcia_get_first_tuple(p_dev, tuple);
 966         while (!ret) {
 967                 cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry;
 968
 969                 if (pcmcia_get_tuple_data(p_dev, tuple))
 970                         goto next_entry;
 971
 972                 if (pcmcia_parse_tuple(p_dev, tuple, &cfg_mem->parse))
 973                         goto next_entry;
 974
 975                 /* default values */
 976                 p_dev->conf.ConfigIndex = cfg->index;
 977                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 978                         cfg_mem->dflt = *cfg;
 979
 980                 ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data);
 981                 if (!ret)
 982                         break;
 983
 984 next_entry:
 985                 ret = pcmcia_get_next_tuple(p_dev, tuple);
 986         }
 987
 988         return ret;
 989 }
 990 EXPORT_SYMBOL(pcmcia_loop_config);