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 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 /** pccard_get_status
 313  *
 314  * Get the current socket state bits.  We don't support the latched
 315  * SocketState yet: I haven't seen any point for it.
 316  */
 317
 318 int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev,
 319                       cs_status_t *status)
 320 {
 321         config_t *c;
 322         int val;
 323
 324         s->ops->get_status(s, &val);
 325         status->CardState = status->SocketState = 0;
 326         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 327         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 328         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 329         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 330         if (s->state & SOCKET_SUSPEND)
 331                 status->CardState |= CS_EVENT_PM_SUSPEND;
 332         if (!(s->state & SOCKET_PRESENT))
 333                 return CS_NO_CARD;
 334
 335         c = (p_dev) ? p_dev->function_config : NULL;
 336
 337         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 338             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 339                 u_char reg;
 340                 if (c->CardValues & PRESENT_PIN_REPLACE) {
 341                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 342                         status->CardState |=
 343                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 344                         status->CardState |=
 345                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 346                         status->CardState |=
 347                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 348                         status->CardState |=
 349                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 350                 } else {
 351                         /* No PRR?  Then assume we're always ready */
 352                         status->CardState |= CS_EVENT_READY_CHANGE;
 353                 }
 354                 if (c->CardValues & PRESENT_EXT_STATUS) {
 355                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 356                         status->CardState |=
 357                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 358                 }
 359                 return CS_SUCCESS;
 360         }
 361         status->CardState |=
 362                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 363         status->CardState |=
 364                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 365         status->CardState |=
 366                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 367         status->CardState |=
 368                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 369         return CS_SUCCESS;
 370 } /* pccard_get_status */
 371
 372 int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status)
 373 {
 374         return pccard_get_status(p_dev->socket, p_dev, status);
 375 }
 376 EXPORT_SYMBOL(pcmcia_get_status);
 377
 378
 379
 380 /** pcmcia_get_mem_page
 381  *
 382  * Change the card address of an already open memory window.
 383  */
 384 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 385 {
 386         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 387                 return CS_BAD_HANDLE;
 388         req->Page = 0;
 389         req->CardOffset = win->ctl.card_start;
 390         return CS_SUCCESS;
 391 } /* pcmcia_get_mem_page */
 392 EXPORT_SYMBOL(pcmcia_get_mem_page);
 393
 394
 395 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 396 {
 397         struct pcmcia_socket *s;
 398         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 399                 return CS_BAD_HANDLE;
 400         if (req->Page != 0)
 401                 return CS_BAD_PAGE;
 402         s = win->sock;
 403         win->ctl.card_start = req->CardOffset;
 404         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 405                 return CS_BAD_OFFSET;
 406         return CS_SUCCESS;
 407 } /* pcmcia_map_mem_page */
 408 EXPORT_SYMBOL(pcmcia_map_mem_page);
 409
 410
 411 /** pcmcia_modify_configuration
 412  *
 413  * Modify a locked socket configuration
 414  */
 415 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 416                                 modconf_t *mod)
 417 {
 418         struct pcmcia_socket *s;
 419         config_t *c;
 420
 421         s = p_dev->socket;
 422         c = p_dev->function_config;
 423
 424         if (!(s->state & SOCKET_PRESENT))
 425                 return CS_NO_CARD;
 426         if (!(c->state & CONFIG_LOCKED))
 427                 return CS_CONFIGURATION_LOCKED;
 428
 429         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 430                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 431                         c->Attributes |= CONF_ENABLE_IRQ;
 432                         s->socket.io_irq = s->irq.AssignedIRQ;
 433                 } else {
 434                         c->Attributes &= ~CONF_ENABLE_IRQ;
 435                         s->socket.io_irq = 0;
 436                 }
 437                 s->ops->set_socket(s, &s->socket);
 438         }
 439
 440         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 441                 return CS_BAD_VCC;
 442
 443         /* We only allow changing Vpp1 and Vpp2 to the same value */
 444         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 445             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 446                 if (mod->Vpp1 != mod->Vpp2)
 447                         return CS_BAD_VPP;
 448                 s->socket.Vpp = mod->Vpp1;
 449                 if (s->ops->set_socket(s, &s->socket))
 450                         return CS_BAD_VPP;
 451         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 452                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 453                 return CS_BAD_VPP;
 454
 455         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 456                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 457                 pccard_io_map io_on;
 458                 int i;
 459
 460                 io_on.speed = io_speed;
 461                 for (i = 0; i < MAX_IO_WIN; i++) {
 462                         if (!s->io[i].res)
 463                                 continue;
 464                         io_off.map = i;
 465                         io_on.map = i;
 466
 467                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 468                         io_on.start = s->io[i].res->start;
 469                         io_on.stop = s->io[i].res->end;
 470
 471                         s->ops->set_io_map(s, &io_off);
 472                         mdelay(40);
 473                         s->ops->set_io_map(s, &io_on);
 474                 }
 475         }
 476
 477         return CS_SUCCESS;
 478 } /* modify_configuration */
 479 EXPORT_SYMBOL(pcmcia_modify_configuration);
 480
 481
 482 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 483 {
 484         pccard_io_map io = { 0, 0, 0, 0, 1 };
 485         struct pcmcia_socket *s = p_dev->socket;
 486         config_t *c = p_dev->function_config;
 487         int i;
 488
 489         if (p_dev->_locked) {
 490                 p_dev->_locked = 0;
 491                 if (--(s->lock_count) == 0) {
 492                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 493                         s->socket.Vpp = 0;
 494                         s->socket.io_irq = 0;
 495                         s->ops->set_socket(s, &s->socket);
 496                 }
 497         }
 498         if (c->state & CONFIG_LOCKED) {
 499                 c->state &= ~CONFIG_LOCKED;
 500                 if (c->state & CONFIG_IO_REQ)
 501                         for (i = 0; i < MAX_IO_WIN; i++) {
 502                                 if (!s->io[i].res)
 503                                         continue;
 504                                 s->io[i].Config--;
 505                                 if (s->io[i].Config != 0)
 506                                         continue;
 507                                 io.map = i;
 508                                 s->ops->set_io_map(s, &io);
 509                         }
 510         }
 511
 512         return CS_SUCCESS;
 513 } /* pcmcia_release_configuration */
 514
 515
 516 /** pcmcia_release_io
 517  *
 518  * Release_io() releases the I/O ranges allocated by a client.  This
 519  * may be invoked some time after a card ejection has already dumped
 520  * the actual socket configuration, so if the client is "stale", we
 521  * don't bother checking the port ranges against the current socket
 522  * values.
 523  */
 524 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 525 {
 526         struct pcmcia_socket *s = p_dev->socket;
 527         config_t *c = p_dev->function_config;
 528
 529         if (!p_dev->_io )
 530                 return CS_BAD_HANDLE;
 531
 532         p_dev->_io = 0;
 533
 534         if ((c->io.BasePort1 != req->BasePort1) ||
 535             (c->io.NumPorts1 != req->NumPorts1) ||
 536             (c->io.BasePort2 != req->BasePort2) ||
 537             (c->io.NumPorts2 != req->NumPorts2))
 538                 return CS_BAD_ARGS;
 539
 540         c->state &= ~CONFIG_IO_REQ;
 541
 542         release_io_space(s, req->BasePort1, req->NumPorts1);
 543         if (req->NumPorts2)
 544                 release_io_space(s, req->BasePort2, req->NumPorts2);
 545
 546         return CS_SUCCESS;
 547 } /* pcmcia_release_io */
 548
 549
 550 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 551 {
 552         struct pcmcia_socket *s = p_dev->socket;
 553         config_t *c= p_dev->function_config;
 554
 555         if (!p_dev->_irq)
 556                 return CS_BAD_HANDLE;
 557         p_dev->_irq = 0;
 558
 559         if (c->state & CONFIG_LOCKED)
 560                 return CS_CONFIGURATION_LOCKED;
 561         if (c->irq.Attributes != req->Attributes)
 562                 return CS_BAD_ATTRIBUTE;
 563         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 564                 return CS_BAD_IRQ;
 565         if (--s->irq.Config == 0) {
 566                 c->state &= ~CONFIG_IRQ_REQ;
 567                 s->irq.AssignedIRQ = 0;
 568         }
 569
 570         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 571                 free_irq(req->AssignedIRQ, req->Instance);
 572         }
 573
 574 #ifdef CONFIG_PCMCIA_PROBE
 575         pcmcia_used_irq[req->AssignedIRQ]--;
 576 #endif
 577
 578         return CS_SUCCESS;
 579 } /* pcmcia_release_irq */
 580
 581
 582 int pcmcia_release_window(window_handle_t win)
 583 {
 584         struct pcmcia_socket *s;
 585
 586         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 587                 return CS_BAD_HANDLE;
 588         s = win->sock;
 589         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 590                 return CS_BAD_HANDLE;
 591
 592         /* Shut down memory window */
 593         win->ctl.flags &= ~MAP_ACTIVE;
 594         s->ops->set_mem_map(s, &win->ctl);
 595         s->state &= ~SOCKET_WIN_REQ(win->index);
 596
 597         /* Release system memory */
 598         if (win->ctl.res) {
 599                 release_resource(win->ctl.res);
 600                 kfree(win->ctl.res);
 601                 win->ctl.res = NULL;
 602         }
 603         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 604
 605         win->magic = 0;
 606
 607         return CS_SUCCESS;
 608 } /* pcmcia_release_window */
 609 EXPORT_SYMBOL(pcmcia_release_window);
 610
 611
 612 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 613                                  config_req_t *req)
 614 {
 615         int i;
 616         u_int base;
 617         struct pcmcia_socket *s = p_dev->socket;
 618         config_t *c;
 619         pccard_io_map iomap;
 620
 621         if (!(s->state & SOCKET_PRESENT))
 622                 return CS_NO_CARD;
 623
 624         if (req->IntType & INT_CARDBUS)
 625                 return CS_UNSUPPORTED_MODE;
 626         c = p_dev->function_config;
 627         if (c->state & CONFIG_LOCKED)
 628                 return CS_CONFIGURATION_LOCKED;
 629
 630         /* Do power control.  We don't allow changes in Vcc. */
 631         s->socket.Vpp = req->Vpp;
 632         if (s->ops->set_socket(s, &s->socket))
 633                 return CS_BAD_VPP;
 634
 635         /* Pick memory or I/O card, DMA mode, interrupt */
 636         c->IntType = req->IntType;
 637         c->Attributes = req->Attributes;
 638         if (req->IntType & INT_MEMORY_AND_IO)
 639                 s->socket.flags |= SS_IOCARD;
 640         if (req->IntType & INT_ZOOMED_VIDEO)
 641                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 642         if (req->Attributes & CONF_ENABLE_DMA)
 643                 s->socket.flags |= SS_DMA_MODE;
 644         if (req->Attributes & CONF_ENABLE_SPKR)
 645                 s->socket.flags |= SS_SPKR_ENA;
 646         if (req->Attributes & CONF_ENABLE_IRQ)
 647                 s->socket.io_irq = s->irq.AssignedIRQ;
 648         else
 649                 s->socket.io_irq = 0;
 650         s->ops->set_socket(s, &s->socket);
 651         s->lock_count++;
 652
 653         /* Set up CIS configuration registers */
 654         base = c->ConfigBase = req->ConfigBase;
 655         c->CardValues = req->Present;
 656         if (req->Present & PRESENT_COPY) {
 657                 c->Copy = req->Copy;
 658                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 659         }
 660         if (req->Present & PRESENT_OPTION) {
 661                 if (s->functions == 1) {
 662                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 663                 } else {
 664                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 665                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 666                         if (req->Present & PRESENT_IOBASE_0)
 667                                 c->Option |= COR_ADDR_DECODE;
 668                 }
 669                 if (c->state & CONFIG_IRQ_REQ)
 670                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 671                                 c->Option |= COR_LEVEL_REQ;
 672                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 673                 mdelay(40);
 674         }
 675         if (req->Present & PRESENT_STATUS) {
 676                 c->Status = req->Status;
 677                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 678         }
 679         if (req->Present & PRESENT_PIN_REPLACE) {
 680                 c->Pin = req->Pin;
 681                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 682         }
 683         if (req->Present & PRESENT_EXT_STATUS) {
 684                 c->ExtStatus = req->ExtStatus;
 685                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 686         }
 687         if (req->Present & PRESENT_IOBASE_0) {
 688                 u_char b = c->io.BasePort1 & 0xff;
 689                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 690                 b = (c->io.BasePort1 >> 8) & 0xff;
 691                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 692         }
 693         if (req->Present & PRESENT_IOSIZE) {
 694                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 695                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 696         }
 697
 698         /* Configure I/O windows */
 699         if (c->state & CONFIG_IO_REQ) {
 700                 iomap.speed = io_speed;
 701                 for (i = 0; i < MAX_IO_WIN; i++)
 702                         if (s->io[i].res) {
 703                                 iomap.map = i;
 704                                 iomap.flags = MAP_ACTIVE;
 705                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 706                                 case IO_DATA_PATH_WIDTH_16:
 707                                         iomap.flags |= MAP_16BIT; break;
 708                                 case IO_DATA_PATH_WIDTH_AUTO:
 709                                         iomap.flags |= MAP_AUTOSZ; break;
 710                                 default:
 711                                         break;
 712                                 }
 713                                 iomap.start = s->io[i].res->start;
 714                                 iomap.stop = s->io[i].res->end;
 715                                 s->ops->set_io_map(s, &iomap);
 716                                 s->io[i].Config++;
 717                         }
 718         }
 719
 720         c->state |= CONFIG_LOCKED;
 721         p_dev->_locked = 1;
 722         return CS_SUCCESS;
 723 } /* pcmcia_request_configuration */
 724 EXPORT_SYMBOL(pcmcia_request_configuration);
 725
 726
 727 /** pcmcia_request_io
 728  *
 729  * Request_io() reserves ranges of port addresses for a socket.
 730  * I have not implemented range sharing or alias addressing.
 731  */
 732 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 733 {
 734         struct pcmcia_socket *s = p_dev->socket;
 735         config_t *c;
 736
 737         if (!(s->state & SOCKET_PRESENT))
 738                 return CS_NO_CARD;
 739
 740         if (!req)
 741                 return CS_UNSUPPORTED_MODE;
 742         c = p_dev->function_config;
 743         if (c->state & CONFIG_LOCKED)
 744                 return CS_CONFIGURATION_LOCKED;
 745         if (c->state & CONFIG_IO_REQ)
 746                 return CS_IN_USE;
 747         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 748                 return CS_BAD_ATTRIBUTE;
 749         if ((req->NumPorts2 > 0) &&
 750             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 751                 return CS_BAD_ATTRIBUTE;
 752
 753         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 754                            req->NumPorts1, req->IOAddrLines))
 755                 return CS_IN_USE;
 756
 757         if (req->NumPorts2) {
 758                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 759                                    req->NumPorts2, req->IOAddrLines)) {
 760                         release_io_space(s, req->BasePort1, req->NumPorts1);
 761                         return CS_IN_USE;
 762                 }
 763         }
 764
 765         c->io = *req;
 766         c->state |= CONFIG_IO_REQ;
 767         p_dev->_io = 1;
 768         return CS_SUCCESS;
 769 } /* pcmcia_request_io */
 770 EXPORT_SYMBOL(pcmcia_request_io);
 771
 772
 773 /** pcmcia_request_irq
 774  *
 775  * Request_irq() reserves an irq for this client.
 776  *
 777  * Also, since Linux only reserves irq's when they are actually
 778  * hooked, we don't guarantee that an irq will still be available
 779  * when the configuration is locked.  Now that I think about it,
 780  * there might be a way to fix this using a dummy handler.
 781  */
 782
 783 #ifdef CONFIG_PCMCIA_PROBE
 784 static irqreturn_t test_action(int cpl, void *dev_id)
 785 {
 786         return IRQ_NONE;
 787 }
 788 #endif
 789
 790 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 791 {
 792         struct pcmcia_socket *s = p_dev->socket;
 793         config_t *c;
 794         int ret = CS_IN_USE, irq = 0;
 795         int type;
 796
 797         if (!(s->state & SOCKET_PRESENT))
 798                 return CS_NO_CARD;
 799         c = p_dev->function_config;
 800         if (c->state & CONFIG_LOCKED)
 801                 return CS_CONFIGURATION_LOCKED;
 802         if (c->state & CONFIG_IRQ_REQ)
 803                 return CS_IN_USE;
 804
 805         /* Decide what type of interrupt we are registering */
 806         type = 0;
 807         if (s->functions > 1)           /* All of this ought to be handled higher up */
 808                 type = IRQF_SHARED;
 809         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 810                 type = IRQF_SHARED;
 811
 812 #ifdef CONFIG_PCMCIA_PROBE
 813
 814 #ifdef IRQ_NOAUTOEN
 815         /* if the underlying IRQ infrastructure allows for it, only allocate
 816          * the IRQ, but do not enable it
 817          */
 818         if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 819                 type |= IRQ_NOAUTOEN;
 820 #endif /* IRQ_NOAUTOEN */
 821
 822         if (s->irq.AssignedIRQ != 0) {
 823                 /* If the interrupt is already assigned, it must be the same */
 824                 irq = s->irq.AssignedIRQ;
 825         } else {
 826                 int try;
 827                 u32 mask = s->irq_mask;
 828                 void *data = &p_dev->dev.driver; /* something unique to this device */
 829
 830                 for (try = 0; try < 64; try++) {
 831                         irq = try % 32;
 832
 833                         /* marked as available by driver, and not blocked by userspace? */
 834                         if (!((mask >> irq) & 1))
 835                                 continue;
 836
 837                         /* avoid an IRQ which is already used by a PCMCIA card */
 838                         if ((try < 32) && pcmcia_used_irq[irq])
 839                                 continue;
 840
 841                         /* register the correct driver, if possible, of check whether
 842                          * registering a dummy handle works, i.e. if the IRQ isn't
 843                          * marked as used by the kernel resource management core */
 844                         ret = request_irq(irq,
 845                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 846                                           type,
 847                                           p_dev->devname,
 848                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 849                         if (!ret) {
 850                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 851                                         free_irq(irq, data);
 852                                 break;
 853                         }
 854                 }
 855         }
 856 #endif
 857         /* only assign PCI irq if no IRQ already assigned */
 858         if (ret && !s->irq.AssignedIRQ) {
 859                 if (!s->pci_irq)
 860                         return ret;
 861                 type = IRQF_SHARED;
 862                 irq = s->pci_irq;
 863         }
 864
 865         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 866                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 867                         return CS_IN_USE;
 868         }
 869
 870         /* Make sure the fact the request type was overridden is passed back */
 871         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 872                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 873                 printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
 874                 printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n");
 875         }
 876         c->irq.Attributes = req->Attributes;
 877         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 878         s->irq.Config++;
 879
 880         c->state |= CONFIG_IRQ_REQ;
 881         p_dev->_irq = 1;
 882
 883 #ifdef CONFIG_PCMCIA_PROBE
 884         pcmcia_used_irq[irq]++;
 885 #endif
 886
 887         return CS_SUCCESS;
 888 } /* pcmcia_request_irq */
 889 EXPORT_SYMBOL(pcmcia_request_irq);
 890
 891
 892 /** pcmcia_request_window
 893  *
 894  * Request_window() establishes a mapping between card memory space
 895  * and system memory space.
 896  */
 897 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 898 {
 899         struct pcmcia_socket *s = (*p_dev)->socket;
 900         window_t *win;
 901         u_long align;
 902         int w;
 903
 904         if (!(s->state & SOCKET_PRESENT))
 905                 return CS_NO_CARD;
 906         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 907                 return CS_BAD_ATTRIBUTE;
 908
 909         /* Window size defaults to smallest available */
 910         if (req->Size == 0)
 911                 req->Size = s->map_size;
 912         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 913                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 914                  req->Size : s->map_size);
 915         if (req->Size & (s->map_size-1))
 916                 return CS_BAD_SIZE;
 917         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 918             (req->Base & (align-1)))
 919                 return CS_BAD_BASE;
 920         if (req->Base)
 921                 align = 0;
 922
 923         /* Allocate system memory window */
 924         for (w = 0; w < MAX_WIN; w++)
 925                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 926         if (w == MAX_WIN)
 927                 return CS_OUT_OF_RESOURCE;
 928
 929         win = &s->win[w];
 930         win->magic = WINDOW_MAGIC;
 931         win->index = w;
 932         win->handle = *p_dev;
 933         win->sock = s;
 934
 935         if (!(s->features & SS_CAP_STATIC_MAP)) {
 936                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 937                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 938                 if (!win->ctl.res)
 939                         return CS_IN_USE;
 940         }
 941         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 942
 943         /* Configure the socket controller */
 944         win->ctl.map = w+1;
 945         win->ctl.flags = 0;
 946         win->ctl.speed = req->AccessSpeed;
 947         if (req->Attributes & WIN_MEMORY_TYPE)
 948                 win->ctl.flags |= MAP_ATTRIB;
 949         if (req->Attributes & WIN_ENABLE)
 950                 win->ctl.flags |= MAP_ACTIVE;
 951         if (req->Attributes & WIN_DATA_WIDTH_16)
 952                 win->ctl.flags |= MAP_16BIT;
 953         if (req->Attributes & WIN_USE_WAIT)
 954                 win->ctl.flags |= MAP_USE_WAIT;
 955         win->ctl.card_start = 0;
 956         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 957                 return CS_BAD_ARGS;
 958         s->state |= SOCKET_WIN_REQ(w);
 959
 960         /* Return window handle */
 961         if (s->features & SS_CAP_STATIC_MAP) {
 962                 req->Base = win->ctl.static_start;
 963         } else {
 964                 req->Base = win->ctl.res->start;
 965         }
 966         *wh = win;
 967
 968         return CS_SUCCESS;
 969 } /* pcmcia_request_window */
 970 EXPORT_SYMBOL(pcmcia_request_window);
 971
 972 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 973         pcmcia_release_configuration(p_dev);
 974         pcmcia_release_io(p_dev, &p_dev->io);
 975         pcmcia_release_irq(p_dev, &p_dev->irq);
 976         if (p_dev->win)
 977                 pcmcia_release_window(p_dev->win);
 978 }
 979 EXPORT_SYMBOL(pcmcia_disable_device);