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