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 #define IN_CARD_SERVICES
  25 #include <pcmcia/cs_types.h>
  26 #include <pcmcia/ss.h>
  27 #include <pcmcia/cs.h>
  28 #include <pcmcia/bulkmem.h>
  29 #include <pcmcia/cistpl.h>
  30 #include <pcmcia/cisreg.h>
  31 #include <pcmcia/ds.h>
  32
  33 #include "cs_internal.h"
  34 #include "ds_internal.h"
  35
  36
  37 /* Access speed for IO windows */
  38 static int io_speed = 0;
  39 module_param(io_speed, int, 0444);
  40
  41
  42 #ifdef CONFIG_PCMCIA_PROBE
  43 #include <asm/irq.h>
  44 /* mask of IRQs already reserved by other cards, we should avoid using them */
  45 static u8 pcmcia_used_irq[NR_IRQS];
  46 #endif
  47
  48
  49 #ifdef DEBUG
  50 extern int ds_pc_debug;
  51
  52 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  53         if (ds_pc_debug >= lvl)                                 \
  54                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  55                         cs_socket_name(skt) , ## arg);          \
  56 } while (0)
  57 #else
  58 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  59 #endif
  60
  61
  62
  63 /** alloc_io_space
  64  *
  65  * Special stuff for managing IO windows, because they are scarce
  66  */
  67
  68 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
  69                           unsigned int *base, unsigned int num, u_int lines)
  70 {
  71         int i;
  72         unsigned int try, align;
  73
  74         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  75         if (align && (align < num)) {
  76                 if (*base) {
  77                         ds_dbg(s, 0, "odd IO request: num %#x align %#x\n",
  78                                num, align);
  79                         align = 0;
  80                 } else
  81                         while (align && (align < num)) align <<= 1;
  82         }
  83         if (*base & ~(align-1)) {
  84                 ds_dbg(s, 0, "odd IO request: base %#x align %#x\n",
  85                        *base, align);
  86                 align = 0;
  87         }
  88         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  89                 *base = s->io_offset | (*base & 0x0fff);
  90                 return 0;
  91         }
  92         /* Check for an already-allocated window that must conflict with
  93          * what was asked for.  It is a hack because it does not catch all
  94          * potential conflicts, just the most obvious ones.
  95          */
  96         for (i = 0; i < MAX_IO_WIN; i++)
  97                 if ((s->io[i].res) && *base &&
  98                     ((s->io[i].res->start & (align-1)) == *base))
  99                         return 1;
 100         for (i = 0; i < MAX_IO_WIN; i++) {
 101                 if (!s->io[i].res) {
 102                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 103                         if (s->io[i].res) {
 104                                 *base = s->io[i].res->start;
 105                                 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
 106                                 s->io[i].InUse = num;
 107                                 break;
 108                         } else
 109                                 return 1;
 110                 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
 111                         continue;
 112                 /* Try to extend top of window */
 113                 try = s->io[i].res->end + 1;
 114                 if ((*base == 0) || (*base == try))
 115                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 116                                                     s->io[i].res->end + num, s) == 0) {
 117                                 *base = try;
 118                                 s->io[i].InUse += num;
 119                                 break;
 120                         }
 121                 /* Try to extend bottom of window */
 122                 try = s->io[i].res->start - num;
 123                 if ((*base == 0) || (*base == try))
 124                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 125                                                     s->io[i].res->end, s) == 0) {
 126                                 *base = try;
 127                                 s->io[i].InUse += num;
 128                                 break;
 129                         }
 130         }
 131         return (i == MAX_IO_WIN);
 132 } /* alloc_io_space */
 133
 134
 135 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
 136                              unsigned int num)
 137 {
 138         int i;
 139
 140         for (i = 0; i < MAX_IO_WIN; i++) {
 141                 if (!s->io[i].res)
 142                         continue;
 143                 if ((s->io[i].res->start <= base) &&
 144                     (s->io[i].res->end >= base+num-1)) {
 145                         s->io[i].InUse -= num;
 146                         /* Free the window if no one else is using it */
 147                         if (s->io[i].InUse == 0) {
 148                                 release_resource(s->io[i].res);
 149                                 kfree(s->io[i].res);
 150                                 s->io[i].res = NULL;
 151                         }
 152                 }
 153         }
 154 } /* release_io_space */
 155
 156
 157 /** pccard_access_configuration_register
 158  *
 159  * Access_configuration_register() reads and writes configuration
 160  * registers in attribute memory.  Memory window 0 is reserved for
 161  * this and the tuple reading services.
 162  */
 163
 164 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
 165                                          conf_reg_t *reg)
 166 {
 167         struct pcmcia_socket *s;
 168         config_t *c;
 169         int addr;
 170         u_char val;
 171
 172         if (!p_dev || !p_dev->function_config)
 173                 return CS_NO_CARD;
 174
 175         s = p_dev->socket;
 176         c = p_dev->function_config;
 177
 178         if (!(c->state & CONFIG_LOCKED))
 179                 return CS_CONFIGURATION_LOCKED;
 180
 181         addr = (c->ConfigBase + reg->Offset) >> 1;
 182
 183         switch (reg->Action) {
 184         case CS_READ:
 185                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 186                 reg->Value = val;
 187                 break;
 188         case CS_WRITE:
 189                 val = reg->Value;
 190                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 191                 break;
 192         default:
 193                 return CS_BAD_ARGS;
 194                 break;
 195         }
 196         return CS_SUCCESS;
 197 } /* pcmcia_access_configuration_register */
 198 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 199
 200
 201 int pccard_get_configuration_info(struct pcmcia_socket *s,
 202                                   struct pcmcia_device *p_dev,
 203                                   config_info_t *config)
 204 {
 205         config_t *c;
 206
 207         if (!(s->state & SOCKET_PRESENT))
 208                 return CS_NO_CARD;
 209
 210
 211 #ifdef CONFIG_CARDBUS
 212         if (s->state & SOCKET_CARDBUS) {
 213                 memset(config, 0, sizeof(config_info_t));
 214                 config->Vcc = s->socket.Vcc;
 215                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 216                 config->Option = s->cb_dev->subordinate->number;
 217                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 218                         config->Attributes = CONF_VALID_CLIENT;
 219                         config->IntType = INT_CARDBUS;
 220                         config->AssignedIRQ = s->irq.AssignedIRQ;
 221                         if (config->AssignedIRQ)
 222                                 config->Attributes |= CONF_ENABLE_IRQ;
 223                         if (s->io[0].res) {
 224                                 config->BasePort1 = s->io[0].res->start;
 225                                 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
 226                         }
 227                 }
 228                 return CS_SUCCESS;
 229         }
 230 #endif
 231
 232         if (p_dev) {
 233                 c = p_dev->function_config;
 234                 config->Function = p_dev->func;
 235         } else {
 236                 c = NULL;
 237                 config->Function = 0;
 238         }
 239
 240         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 241                 config->Attributes = 0;
 242                 config->Vcc = s->socket.Vcc;
 243                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 244                 return CS_SUCCESS;
 245         }
 246
 247         config->Attributes = c->Attributes | CONF_VALID_CLIENT;
 248         config->Vcc = s->socket.Vcc;
 249         config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 250         config->IntType = c->IntType;
 251         config->ConfigBase = c->ConfigBase;
 252         config->Status = c->Status;
 253         config->Pin = c->Pin;
 254         config->Copy = c->Copy;
 255         config->Option = c->Option;
 256         config->ExtStatus = c->ExtStatus;
 257         config->Present = config->CardValues = c->CardValues;
 258         config->IRQAttributes = c->irq.Attributes;
 259         config->AssignedIRQ = s->irq.AssignedIRQ;
 260         config->BasePort1 = c->io.BasePort1;
 261         config->NumPorts1 = c->io.NumPorts1;
 262         config->Attributes1 = c->io.Attributes1;
 263         config->BasePort2 = c->io.BasePort2;
 264         config->NumPorts2 = c->io.NumPorts2;
 265         config->Attributes2 = c->io.Attributes2;
 266         config->IOAddrLines = c->io.IOAddrLines;
 267
 268         return CS_SUCCESS;
 269 } /* pccard_get_configuration_info */
 270
 271 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 272                                   config_info_t *config)
 273 {
 274         return pccard_get_configuration_info(p_dev->socket, p_dev,
 275                                              config);
 276 }
 277 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 278
 279
 280 /** pcmcia_get_window
 281  */
 282 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 283                       int idx, win_req_t *req)
 284 {
 285         window_t *win;
 286         int w;
 287
 288         if (!s || !(s->state & SOCKET_PRESENT))
 289                 return CS_NO_CARD;
 290         for (w = idx; w < MAX_WIN; w++)
 291                 if (s->state & SOCKET_WIN_REQ(w))
 292                         break;
 293         if (w == MAX_WIN)
 294                 return CS_NO_MORE_ITEMS;
 295         win = &s->win[w];
 296         req->Base = win->ctl.res->start;
 297         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 298         req->AccessSpeed = win->ctl.speed;
 299         req->Attributes = 0;
 300         if (win->ctl.flags & MAP_ATTRIB)
 301                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 302         if (win->ctl.flags & MAP_ACTIVE)
 303                 req->Attributes |= WIN_ENABLE;
 304         if (win->ctl.flags & MAP_16BIT)
 305                 req->Attributes |= WIN_DATA_WIDTH_16;
 306         if (win->ctl.flags & MAP_USE_WAIT)
 307                 req->Attributes |= WIN_USE_WAIT;
 308         *handle = win;
 309         return CS_SUCCESS;
 310 } /* pcmcia_get_window */
 311 EXPORT_SYMBOL(pcmcia_get_window);
 312
 313
 314 /** pccard_get_status
 315  *
 316  * Get the current socket state bits.  We don't support the latched
 317  * SocketState yet: I haven't seen any point for it.
 318  */
 319
 320 int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev,
 321                       cs_status_t *status)
 322 {
 323         config_t *c;
 324         int val;
 325
 326         s->ops->get_status(s, &val);
 327         status->CardState = status->SocketState = 0;
 328         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 329         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 330         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 331         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 332         if (s->state & SOCKET_SUSPEND)
 333                 status->CardState |= CS_EVENT_PM_SUSPEND;
 334         if (!(s->state & SOCKET_PRESENT))
 335                 return CS_NO_CARD;
 336
 337         c = (p_dev) ? p_dev->function_config : NULL;
 338
 339         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 340             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 341                 u_char reg;
 342                 if (c->CardValues & PRESENT_PIN_REPLACE) {
 343                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 344                         status->CardState |=
 345                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 346                         status->CardState |=
 347                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 348                         status->CardState |=
 349                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 350                         status->CardState |=
 351                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 352                 } else {
 353                         /* No PRR?  Then assume we're always ready */
 354                         status->CardState |= CS_EVENT_READY_CHANGE;
 355                 }
 356                 if (c->CardValues & PRESENT_EXT_STATUS) {
 357                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 358                         status->CardState |=
 359                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 360                 }
 361                 return CS_SUCCESS;
 362         }
 363         status->CardState |=
 364                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 365         status->CardState |=
 366                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 367         status->CardState |=
 368                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 369         status->CardState |=
 370                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 371         return CS_SUCCESS;
 372 } /* pccard_get_status */
 373
 374 int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status)
 375 {
 376         return pccard_get_status(p_dev->socket, p_dev, status);
 377 }
 378 EXPORT_SYMBOL(pcmcia_get_status);
 379
 380
 381
 382 /** pcmcia_get_mem_page
 383  *
 384  * Change the card address of an already open memory window.
 385  */
 386 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 387 {
 388         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 389                 return CS_BAD_HANDLE;
 390         req->Page = 0;
 391         req->CardOffset = win->ctl.card_start;
 392         return CS_SUCCESS;
 393 } /* pcmcia_get_mem_page */
 394 EXPORT_SYMBOL(pcmcia_get_mem_page);
 395
 396
 397 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 398 {
 399         struct pcmcia_socket *s;
 400         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 401                 return CS_BAD_HANDLE;
 402         if (req->Page != 0)
 403                 return CS_BAD_PAGE;
 404         s = win->sock;
 405         win->ctl.card_start = req->CardOffset;
 406         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 407                 return CS_BAD_OFFSET;
 408         return CS_SUCCESS;
 409 } /* pcmcia_map_mem_page */
 410 EXPORT_SYMBOL(pcmcia_map_mem_page);
 411
 412
 413 /** pcmcia_modify_configuration
 414  *
 415  * Modify a locked socket configuration
 416  */
 417 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 418                                 modconf_t *mod)
 419 {
 420         struct pcmcia_socket *s;
 421         config_t *c;
 422
 423         s = p_dev->socket;
 424         c = p_dev->function_config;
 425
 426         if (!(s->state & SOCKET_PRESENT))
 427                 return CS_NO_CARD;
 428         if (!(c->state & CONFIG_LOCKED))
 429                 return CS_CONFIGURATION_LOCKED;
 430
 431         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 432                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 433                         c->Attributes |= CONF_ENABLE_IRQ;
 434                         s->socket.io_irq = s->irq.AssignedIRQ;
 435                 } else {
 436                         c->Attributes &= ~CONF_ENABLE_IRQ;
 437                         s->socket.io_irq = 0;
 438                 }
 439                 s->ops->set_socket(s, &s->socket);
 440         }
 441
 442         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 443                 return CS_BAD_VCC;
 444
 445         /* We only allow changing Vpp1 and Vpp2 to the same value */
 446         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 447             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 448                 if (mod->Vpp1 != mod->Vpp2)
 449                         return CS_BAD_VPP;
 450                 s->socket.Vpp = mod->Vpp1;
 451                 if (s->ops->set_socket(s, &s->socket))
 452                         return CS_BAD_VPP;
 453         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 454                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 455                 return CS_BAD_VPP;
 456
 457         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 458                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 459                 pccard_io_map io_on;
 460                 int i;
 461
 462                 io_on.speed = io_speed;
 463                 for (i = 0; i < MAX_IO_WIN; i++) {
 464                         if (!s->io[i].res)
 465                                 continue;
 466                         io_off.map = i;
 467                         io_on.map = i;
 468
 469                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 470                         io_on.start = s->io[i].res->start;
 471                         io_on.stop = s->io[i].res->end;
 472
 473                         s->ops->set_io_map(s, &io_off);
 474                         mdelay(40);
 475                         s->ops->set_io_map(s, &io_on);
 476                 }
 477         }
 478
 479         return CS_SUCCESS;
 480 } /* modify_configuration */
 481 EXPORT_SYMBOL(pcmcia_modify_configuration);
 482
 483
 484 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 485 {
 486         pccard_io_map io = { 0, 0, 0, 0, 1 };
 487         struct pcmcia_socket *s = p_dev->socket;
 488         config_t *c = p_dev->function_config;
 489         int i;
 490
 491         if (p_dev->_locked) {
 492                 p_dev->_locked = 0;
 493                 if (--(s->lock_count) == 0) {
 494                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 495                         s->socket.Vpp = 0;
 496                         s->socket.io_irq = 0;
 497                         s->ops->set_socket(s, &s->socket);
 498                 }
 499         }
 500         if (c->state & CONFIG_LOCKED) {
 501                 c->state &= ~CONFIG_LOCKED;
 502                 if (c->state & CONFIG_IO_REQ)
 503                         for (i = 0; i < MAX_IO_WIN; i++) {
 504                                 if (!s->io[i].res)
 505                                         continue;
 506                                 s->io[i].Config--;
 507                                 if (s->io[i].Config != 0)
 508                                         continue;
 509                                 io.map = i;
 510                                 s->ops->set_io_map(s, &io);
 511                         }
 512         }
 513
 514         return CS_SUCCESS;
 515 } /* pcmcia_release_configuration */
 516
 517
 518 /** pcmcia_release_io
 519  *
 520  * Release_io() releases the I/O ranges allocated by a client.  This
 521  * may be invoked some time after a card ejection has already dumped
 522  * the actual socket configuration, so if the client is "stale", we
 523  * don't bother checking the port ranges against the current socket
 524  * values.
 525  */
 526 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 527 {
 528         struct pcmcia_socket *s = p_dev->socket;
 529         config_t *c = p_dev->function_config;
 530
 531         if (!p_dev->_io )
 532                 return CS_BAD_HANDLE;
 533
 534         p_dev->_io = 0;
 535
 536         if ((c->io.BasePort1 != req->BasePort1) ||
 537             (c->io.NumPorts1 != req->NumPorts1) ||
 538             (c->io.BasePort2 != req->BasePort2) ||
 539             (c->io.NumPorts2 != req->NumPorts2))
 540                 return CS_BAD_ARGS;
 541
 542         c->state &= ~CONFIG_IO_REQ;
 543
 544         release_io_space(s, req->BasePort1, req->NumPorts1);
 545         if (req->NumPorts2)
 546                 release_io_space(s, req->BasePort2, req->NumPorts2);
 547
 548         return CS_SUCCESS;
 549 } /* pcmcia_release_io */
 550
 551
 552 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 553 {
 554         struct pcmcia_socket *s = p_dev->socket;
 555         config_t *c= p_dev->function_config;
 556
 557         if (!p_dev->_irq)
 558                 return CS_BAD_HANDLE;
 559         p_dev->_irq = 0;
 560
 561         if (c->state & CONFIG_LOCKED)
 562                 return CS_CONFIGURATION_LOCKED;
 563         if (c->irq.Attributes != req->Attributes)
 564                 return CS_BAD_ATTRIBUTE;
 565         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 566                 return CS_BAD_IRQ;
 567         if (--s->irq.Config == 0) {
 568                 c->state &= ~CONFIG_IRQ_REQ;
 569                 s->irq.AssignedIRQ = 0;
 570         }
 571
 572         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 573                 free_irq(req->AssignedIRQ, req->Instance);
 574         }
 575
 576 #ifdef CONFIG_PCMCIA_PROBE
 577         pcmcia_used_irq[req->AssignedIRQ]--;
 578 #endif
 579
 580         return CS_SUCCESS;
 581 } /* pcmcia_release_irq */
 582
 583
 584 int pcmcia_release_window(window_handle_t win)
 585 {
 586         struct pcmcia_socket *s;
 587
 588         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 589                 return CS_BAD_HANDLE;
 590         s = win->sock;
 591         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 592                 return CS_BAD_HANDLE;
 593
 594         /* Shut down memory window */
 595         win->ctl.flags &= ~MAP_ACTIVE;
 596         s->ops->set_mem_map(s, &win->ctl);
 597         s->state &= ~SOCKET_WIN_REQ(win->index);
 598
 599         /* Release system memory */
 600         if (win->ctl.res) {
 601                 release_resource(win->ctl.res);
 602                 kfree(win->ctl.res);
 603                 win->ctl.res = NULL;
 604         }
 605         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 606
 607         win->magic = 0;
 608
 609         return CS_SUCCESS;
 610 } /* pcmcia_release_window */
 611 EXPORT_SYMBOL(pcmcia_release_window);
 612
 613
 614 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 615                                  config_req_t *req)
 616 {
 617         int i;
 618         u_int base;
 619         struct pcmcia_socket *s = p_dev->socket;
 620         config_t *c;
 621         pccard_io_map iomap;
 622
 623         if (!(s->state & SOCKET_PRESENT))
 624                 return CS_NO_CARD;
 625
 626         if (req->IntType & INT_CARDBUS)
 627                 return CS_UNSUPPORTED_MODE;
 628         c = p_dev->function_config;
 629         if (c->state & CONFIG_LOCKED)
 630                 return CS_CONFIGURATION_LOCKED;
 631
 632         /* Do power control.  We don't allow changes in Vcc. */
 633         s->socket.Vpp = req->Vpp;
 634         if (s->ops->set_socket(s, &s->socket))
 635                 return CS_BAD_VPP;
 636
 637         /* Pick memory or I/O card, DMA mode, interrupt */
 638         c->IntType = req->IntType;
 639         c->Attributes = req->Attributes;
 640         if (req->IntType & INT_MEMORY_AND_IO)
 641                 s->socket.flags |= SS_IOCARD;
 642         if (req->IntType & INT_ZOOMED_VIDEO)
 643                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 644         if (req->Attributes & CONF_ENABLE_DMA)
 645                 s->socket.flags |= SS_DMA_MODE;
 646         if (req->Attributes & CONF_ENABLE_SPKR)
 647                 s->socket.flags |= SS_SPKR_ENA;
 648         if (req->Attributes & CONF_ENABLE_IRQ)
 649                 s->socket.io_irq = s->irq.AssignedIRQ;
 650         else
 651                 s->socket.io_irq = 0;
 652         s->ops->set_socket(s, &s->socket);
 653         s->lock_count++;
 654
 655         /* Set up CIS configuration registers */
 656         base = c->ConfigBase = req->ConfigBase;
 657         c->CardValues = req->Present;
 658         if (req->Present & PRESENT_COPY) {
 659                 c->Copy = req->Copy;
 660                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 661         }
 662         if (req->Present & PRESENT_OPTION) {
 663                 if (s->functions == 1) {
 664                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 665                 } else {
 666                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 667                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 668                         if (req->Present & PRESENT_IOBASE_0)
 669                                 c->Option |= COR_ADDR_DECODE;
 670                 }
 671                 if (c->state & CONFIG_IRQ_REQ)
 672                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 673                                 c->Option |= COR_LEVEL_REQ;
 674                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 675                 mdelay(40);
 676         }
 677         if (req->Present & PRESENT_STATUS) {
 678                 c->Status = req->Status;
 679                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 680         }
 681         if (req->Present & PRESENT_PIN_REPLACE) {
 682                 c->Pin = req->Pin;
 683                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 684         }
 685         if (req->Present & PRESENT_EXT_STATUS) {
 686                 c->ExtStatus = req->ExtStatus;
 687                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 688         }
 689         if (req->Present & PRESENT_IOBASE_0) {
 690                 u_char b = c->io.BasePort1 & 0xff;
 691                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 692                 b = (c->io.BasePort1 >> 8) & 0xff;
 693                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 694         }
 695         if (req->Present & PRESENT_IOSIZE) {
 696                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 697                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 698         }
 699
 700         /* Configure I/O windows */
 701         if (c->state & CONFIG_IO_REQ) {
 702                 iomap.speed = io_speed;
 703                 for (i = 0; i < MAX_IO_WIN; i++)
 704                         if (s->io[i].res) {
 705                                 iomap.map = i;
 706                                 iomap.flags = MAP_ACTIVE;
 707                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 708                                 case IO_DATA_PATH_WIDTH_16:
 709                                         iomap.flags |= MAP_16BIT; break;
 710                                 case IO_DATA_PATH_WIDTH_AUTO:
 711                                         iomap.flags |= MAP_AUTOSZ; break;
 712                                 default:
 713                                         break;
 714                                 }
 715                                 iomap.start = s->io[i].res->start;
 716                                 iomap.stop = s->io[i].res->end;
 717                                 s->ops->set_io_map(s, &iomap);
 718                                 s->io[i].Config++;
 719                         }
 720         }
 721
 722         c->state |= CONFIG_LOCKED;
 723         p_dev->_locked = 1;
 724         return CS_SUCCESS;
 725 } /* pcmcia_request_configuration */
 726 EXPORT_SYMBOL(pcmcia_request_configuration);
 727
 728
 729 /** pcmcia_request_io
 730  *
 731  * Request_io() reserves ranges of port addresses for a socket.
 732  * I have not implemented range sharing or alias addressing.
 733  */
 734 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 735 {
 736         struct pcmcia_socket *s = p_dev->socket;
 737         config_t *c;
 738
 739         if (!(s->state & SOCKET_PRESENT))
 740                 return CS_NO_CARD;
 741
 742         if (!req)
 743                 return CS_UNSUPPORTED_MODE;
 744         c = p_dev->function_config;
 745         if (c->state & CONFIG_LOCKED)
 746                 return CS_CONFIGURATION_LOCKED;
 747         if (c->state & CONFIG_IO_REQ)
 748                 return CS_IN_USE;
 749         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 750                 return CS_BAD_ATTRIBUTE;
 751         if ((req->NumPorts2 > 0) &&
 752             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 753                 return CS_BAD_ATTRIBUTE;
 754
 755         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 756                            req->NumPorts1, req->IOAddrLines))
 757                 return CS_IN_USE;
 758
 759         if (req->NumPorts2) {
 760                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 761                                    req->NumPorts2, req->IOAddrLines)) {
 762                         release_io_space(s, req->BasePort1, req->NumPorts1);
 763                         return CS_IN_USE;
 764                 }
 765         }
 766
 767         c->io = *req;
 768         c->state |= CONFIG_IO_REQ;
 769         p_dev->_io = 1;
 770         return CS_SUCCESS;
 771 } /* pcmcia_request_io */
 772 EXPORT_SYMBOL(pcmcia_request_io);
 773
 774
 775 /** pcmcia_request_irq
 776  *
 777  * Request_irq() reserves an irq for this client.
 778  *
 779  * Also, since Linux only reserves irq's when they are actually
 780  * hooked, we don't guarantee that an irq will still be available
 781  * when the configuration is locked.  Now that I think about it,
 782  * there might be a way to fix this using a dummy handler.
 783  */
 784
 785 #ifdef CONFIG_PCMCIA_PROBE
 786 static irqreturn_t test_action(int cpl, void *dev_id)
 787 {
 788         return IRQ_NONE;
 789 }
 790 #endif
 791
 792 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 793 {
 794         struct pcmcia_socket *s = p_dev->socket;
 795         config_t *c;
 796         int ret = CS_IN_USE, irq = 0;
 797         int type;
 798
 799         if (!(s->state & SOCKET_PRESENT))
 800                 return CS_NO_CARD;
 801         c = p_dev->function_config;
 802         if (c->state & CONFIG_LOCKED)
 803                 return CS_CONFIGURATION_LOCKED;
 804         if (c->state & CONFIG_IRQ_REQ)
 805                 return CS_IN_USE;
 806
 807         /* Decide what type of interrupt we are registering */
 808         type = 0;
 809         if (s->functions > 1)           /* All of this ought to be handled higher up */
 810                 type = IRQF_SHARED;
 811         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 812                 type = IRQF_SHARED;
 813
 814 #ifdef CONFIG_PCMCIA_PROBE
 815         if (s->irq.AssignedIRQ != 0) {
 816                 /* If the interrupt is already assigned, it must be the same */
 817                 irq = s->irq.AssignedIRQ;
 818         } else {
 819                 int try;
 820                 u32 mask = s->irq_mask;
 821                 void *data = &p_dev->dev.driver; /* something unique to this device */
 822
 823                 for (try = 0; try < 64; try++) {
 824                         irq = try % 32;
 825
 826                         /* marked as available by driver, and not blocked by userspace? */
 827                         if (!((mask >> irq) & 1))
 828                                 continue;
 829
 830                         /* avoid an IRQ which is already used by a PCMCIA card */
 831                         if ((try < 32) && pcmcia_used_irq[irq])
 832                                 continue;
 833
 834                         /* register the correct driver, if possible, of check whether
 835                          * registering a dummy handle works, i.e. if the IRQ isn't
 836                          * marked as used by the kernel resource management core */
 837                         ret = request_irq(irq,
 838                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 839                                           type,
 840                                           p_dev->devname,
 841                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 842                         if (!ret) {
 843                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 844                                         free_irq(irq, data);
 845                                 break;
 846                         }
 847                 }
 848         }
 849 #endif
 850         /* only assign PCI irq if no IRQ already assigned */
 851         if (ret && !s->irq.AssignedIRQ) {
 852                 if (!s->pci_irq)
 853                         return ret;
 854                 type = IRQF_SHARED;
 855                 irq = s->pci_irq;
 856         }
 857
 858         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 859                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 860                         return CS_IN_USE;
 861         }
 862
 863         /* Make sure the fact the request type was overridden is passed back */
 864         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 865                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 866                 printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
 867                 printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n");
 868         }
 869         c->irq.Attributes = req->Attributes;
 870         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 871         s->irq.Config++;
 872
 873         c->state |= CONFIG_IRQ_REQ;
 874         p_dev->_irq = 1;
 875
 876 #ifdef CONFIG_PCMCIA_PROBE
 877         pcmcia_used_irq[irq]++;
 878 #endif
 879
 880         return CS_SUCCESS;
 881 } /* pcmcia_request_irq */
 882 EXPORT_SYMBOL(pcmcia_request_irq);
 883
 884
 885 /** pcmcia_request_window
 886  *
 887  * Request_window() establishes a mapping between card memory space
 888  * and system memory space.
 889  */
 890 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 891 {
 892         struct pcmcia_socket *s = (*p_dev)->socket;
 893         window_t *win;
 894         u_long align;
 895         int w;
 896
 897         if (!(s->state & SOCKET_PRESENT))
 898                 return CS_NO_CARD;
 899         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 900                 return CS_BAD_ATTRIBUTE;
 901
 902         /* Window size defaults to smallest available */
 903         if (req->Size == 0)
 904                 req->Size = s->map_size;
 905         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 906                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 907                  req->Size : s->map_size);
 908         if (req->Size & (s->map_size-1))
 909                 return CS_BAD_SIZE;
 910         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 911             (req->Base & (align-1)))
 912                 return CS_BAD_BASE;
 913         if (req->Base)
 914                 align = 0;
 915
 916         /* Allocate system memory window */
 917         for (w = 0; w < MAX_WIN; w++)
 918                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 919         if (w == MAX_WIN)
 920                 return CS_OUT_OF_RESOURCE;
 921
 922         win = &s->win[w];
 923         win->magic = WINDOW_MAGIC;
 924         win->index = w;
 925         win->handle = *p_dev;
 926         win->sock = s;
 927
 928         if (!(s->features & SS_CAP_STATIC_MAP)) {
 929                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 930                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 931                 if (!win->ctl.res)
 932                         return CS_IN_USE;
 933         }
 934         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 935
 936         /* Configure the socket controller */
 937         win->ctl.map = w+1;
 938         win->ctl.flags = 0;
 939         win->ctl.speed = req->AccessSpeed;
 940         if (req->Attributes & WIN_MEMORY_TYPE)
 941                 win->ctl.flags |= MAP_ATTRIB;
 942         if (req->Attributes & WIN_ENABLE)
 943                 win->ctl.flags |= MAP_ACTIVE;
 944         if (req->Attributes & WIN_DATA_WIDTH_16)
 945                 win->ctl.flags |= MAP_16BIT;
 946         if (req->Attributes & WIN_USE_WAIT)
 947                 win->ctl.flags |= MAP_USE_WAIT;
 948         win->ctl.card_start = 0;
 949         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 950                 return CS_BAD_ARGS;
 951         s->state |= SOCKET_WIN_REQ(w);
 952
 953         /* Return window handle */
 954         if (s->features & SS_CAP_STATIC_MAP) {
 955                 req->Base = win->ctl.static_start;
 956         } else {
 957                 req->Base = win->ctl.res->start;
 958         }
 959         *wh = win;
 960
 961         return CS_SUCCESS;
 962 } /* pcmcia_request_window */
 963 EXPORT_SYMBOL(pcmcia_request_window);
 964
 965 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 966         pcmcia_release_configuration(p_dev);
 967         pcmcia_release_io(p_dev, &p_dev->io);
 968         pcmcia_release_irq(p_dev, &p_dev->irq);
 969         if (&p_dev->win)
 970                 pcmcia_release_window(p_dev->win);
 971 }
 972 EXPORT_SYMBOL(pcmcia_disable_device);