Pileus Git - ~andy/linux/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/config.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/delay.h>
  22 #include <linux/pci.h>
  23 #include <linux/device.h>
  24
  25 #define IN_CARD_SERVICES
  26 #include <pcmcia/version.h>
  27 #include <pcmcia/cs_types.h>
  28 #include <pcmcia/ss.h>
  29 #include <pcmcia/cs.h>
  30 #include <pcmcia/bulkmem.h>
  31 #include <pcmcia/cistpl.h>
  32 #include <pcmcia/cisreg.h>
  33 #include <pcmcia/ds.h>
  34
  35 #include "cs_internal.h"
  36 #include "ds_internal.h"
  37
  38
  39 static const char *release = "Linux Kernel Card Services";
  40
  41 /* Access speed for IO windows */
  42 static int io_speed = 0;
  43 module_param(io_speed, int, 0444);
  44
  45
  46 #ifdef CONFIG_PCMCIA_PROBE
  47 /* mask of IRQs already reserved by other cards, we should avoid using them */
  48 static u8 pcmcia_used_irq[NR_IRQS];
  49 #endif
  50
  51
  52 #ifdef DEBUG
  53 extern int ds_pc_debug;
  54 #define cs_socket_name(skt)    ((skt)->dev.class_id)
  55
  56 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  57         if (ds_pc_debug >= lvl)                                 \
  58                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  59                         cs_socket_name(skt) , ## arg);          \
  60 } while (0)
  61 #else
  62 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  63 #endif
  64
  65
  66
  67 /** alloc_io_space
  68  *
  69  * Special stuff for managing IO windows, because they are scarce
  70  */
  71
  72 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
  73                           ioaddr_t num, u_int lines)
  74 {
  75         int i;
  76         kio_addr_t try, align;
  77
  78         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  79         if (align && (align < num)) {
  80                 if (*base) {
  81                         ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
  82                                num, align);
  83                         align = 0;
  84                 } else
  85                         while (align && (align < num)) align <<= 1;
  86         }
  87         if (*base & ~(align-1)) {
  88                 ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
  89                        *base, align);
  90                 align = 0;
  91         }
  92         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  93                 *base = s->io_offset | (*base & 0x0fff);
  94                 return 0;
  95         }
  96         /* Check for an already-allocated window that must conflict with
  97          * what was asked for.  It is a hack because it does not catch all
  98          * potential conflicts, just the most obvious ones.
  99          */
 100         for (i = 0; i < MAX_IO_WIN; i++)
 101                 if ((s->io[i].NumPorts != 0) &&
 102                     ((s->io[i].BasePort & (align-1)) == *base))
 103                         return 1;
 104         for (i = 0; i < MAX_IO_WIN; i++) {
 105                 if (s->io[i].NumPorts == 0) {
 106                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 107                         if (s->io[i].res) {
 108                                 s->io[i].Attributes = attr;
 109                                 s->io[i].BasePort = *base = s->io[i].res->start;
 110                                 s->io[i].NumPorts = s->io[i].InUse = num;
 111                                 break;
 112                         } else
 113                                 return 1;
 114                 } else if (s->io[i].Attributes != attr)
 115                         continue;
 116                 /* Try to extend top of window */
 117                 try = s->io[i].BasePort + s->io[i].NumPorts;
 118                 if ((*base == 0) || (*base == try))
 119                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 120                                                     s->io[i].res->end + num, s) == 0) {
 121                                 *base = try;
 122                                 s->io[i].NumPorts += num;
 123                                 s->io[i].InUse += num;
 124                                 break;
 125                         }
 126                 /* Try to extend bottom of window */
 127                 try = s->io[i].BasePort - num;
 128                 if ((*base == 0) || (*base == try))
 129                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 130                                                     s->io[i].res->end, s) == 0) {
 131                                 s->io[i].BasePort = *base = try;
 132                                 s->io[i].NumPorts += num;
 133                                 s->io[i].InUse += num;
 134                                 break;
 135                         }
 136         }
 137         return (i == MAX_IO_WIN);
 138 } /* alloc_io_space */
 139
 140
 141 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
 142                              ioaddr_t num)
 143 {
 144         int i;
 145
 146         for (i = 0; i < MAX_IO_WIN; i++) {
 147                 if ((s->io[i].BasePort <= base) &&
 148                     (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
 149                         s->io[i].InUse -= num;
 150                         /* Free the window if no one else is using it */
 151                         if (s->io[i].InUse == 0) {
 152                                 s->io[i].NumPorts = 0;
 153                                 release_resource(s->io[i].res);
 154                                 kfree(s->io[i].res);
 155                                 s->io[i].res = NULL;
 156                         }
 157                 }
 158         }
 159 } /* release_io_space */
 160
 161
 162 /** pccard_access_configuration_register
 163  *
 164  * Access_configuration_register() reads and writes configuration
 165  * registers in attribute memory.  Memory window 0 is reserved for
 166  * this and the tuple reading services.
 167  */
 168
 169 int pccard_access_configuration_register(struct pcmcia_socket *s,
 170                                          unsigned int function,
 171                                          conf_reg_t *reg)
 172 {
 173         config_t *c;
 174         int addr;
 175         u_char val;
 176
 177         if (!s || !s->config)
 178                 return CS_NO_CARD;
 179
 180         c = &s->config[function];
 181
 182         if (c == NULL)
 183                 return CS_NO_CARD;
 184
 185         if (!(c->state & CONFIG_LOCKED))
 186                 return CS_CONFIGURATION_LOCKED;
 187
 188         addr = (c->ConfigBase + reg->Offset) >> 1;
 189
 190         switch (reg->Action) {
 191         case CS_READ:
 192                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 193                 reg->Value = val;
 194                 break;
 195         case CS_WRITE:
 196                 val = reg->Value;
 197                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 198                 break;
 199         default:
 200                 return CS_BAD_ARGS;
 201                 break;
 202         }
 203         return CS_SUCCESS;
 204 } /* pccard_access_configuration_register */
 205 EXPORT_SYMBOL(pccard_access_configuration_register);
 206
 207
 208 int pccard_get_configuration_info(struct pcmcia_socket *s,
 209                                   unsigned int function,
 210                                   config_info_t *config)
 211 {
 212         config_t *c;
 213
 214         if (!(s->state & SOCKET_PRESENT))
 215                 return CS_NO_CARD;
 216
 217         config->Function = function;
 218
 219 #ifdef CONFIG_CARDBUS
 220         if (s->state & SOCKET_CARDBUS) {
 221                 memset(config, 0, sizeof(config_info_t));
 222                 config->Vcc = s->socket.Vcc;
 223                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 224                 config->Option = s->cb_dev->subordinate->number;
 225                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 226                         config->Attributes = CONF_VALID_CLIENT;
 227                         config->IntType = INT_CARDBUS;
 228                         config->AssignedIRQ = s->irq.AssignedIRQ;
 229                         if (config->AssignedIRQ)
 230                                 config->Attributes |= CONF_ENABLE_IRQ;
 231                         config->BasePort1 = s->io[0].BasePort;
 232                         config->NumPorts1 = s->io[0].NumPorts;
 233                 }
 234                 return CS_SUCCESS;
 235         }
 236 #endif
 237
 238         c = (s->config != NULL) ? &s->config[function] : NULL;
 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         /* !!! This is a hack !!! */
 248         memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
 249         config->Attributes |= CONF_VALID_CLIENT;
 250         config->CardValues = c->CardValues;
 251         config->IRQAttributes = c->irq.Attributes;
 252         config->AssignedIRQ = s->irq.AssignedIRQ;
 253         config->BasePort1 = c->io.BasePort1;
 254         config->NumPorts1 = c->io.NumPorts1;
 255         config->Attributes1 = c->io.Attributes1;
 256         config->BasePort2 = c->io.BasePort2;
 257         config->NumPorts2 = c->io.NumPorts2;
 258         config->Attributes2 = c->io.Attributes2;
 259         config->IOAddrLines = c->io.IOAddrLines;
 260
 261         return CS_SUCCESS;
 262 } /* pccard_get_configuration_info */
 263 EXPORT_SYMBOL(pccard_get_configuration_info);
 264
 265
 266 /** pcmcia_get_card_services_info
 267  *
 268  * Return information about this version of Card Services
 269  */
 270
 271 int pcmcia_get_card_services_info(servinfo_t *info)
 272 {
 273         unsigned int socket_count = 0;
 274         struct list_head *tmp;
 275         info->Signature[0] = 'C';
 276         info->Signature[1] = 'S';
 277         down_read(&pcmcia_socket_list_rwsem);
 278         list_for_each(tmp, &pcmcia_socket_list)
 279                 socket_count++;
 280         up_read(&pcmcia_socket_list_rwsem);
 281         info->Count = socket_count;
 282         info->Revision = CS_RELEASE_CODE;
 283         info->CSLevel = 0x0210;
 284         info->VendorString = (char *)release;
 285         return CS_SUCCESS;
 286 } /* get_card_services_info */
 287 EXPORT_SYMBOL(pcmcia_get_card_services_info);
 288
 289
 290 /** pcmcia_get_window
 291  */
 292 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 293                       int idx, win_req_t *req)
 294 {
 295         window_t *win;
 296         int w;
 297
 298         if (!s || !(s->state & SOCKET_PRESENT))
 299                 return CS_NO_CARD;
 300         for (w = idx; w < MAX_WIN; w++)
 301                 if (s->state & SOCKET_WIN_REQ(w))
 302                         break;
 303         if (w == MAX_WIN)
 304                 return CS_NO_MORE_ITEMS;
 305         win = &s->win[w];
 306         req->Base = win->ctl.res->start;
 307         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 308         req->AccessSpeed = win->ctl.speed;
 309         req->Attributes = 0;
 310         if (win->ctl.flags & MAP_ATTRIB)
 311                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 312         if (win->ctl.flags & MAP_ACTIVE)
 313                 req->Attributes |= WIN_ENABLE;
 314         if (win->ctl.flags & MAP_16BIT)
 315                 req->Attributes |= WIN_DATA_WIDTH_16;
 316         if (win->ctl.flags & MAP_USE_WAIT)
 317                 req->Attributes |= WIN_USE_WAIT;
 318         *handle = win;
 319         return CS_SUCCESS;
 320 } /* pcmcia_get_window */
 321 EXPORT_SYMBOL(pcmcia_get_window);
 322
 323
 324 /** pccard_get_status
 325  *
 326  * Get the current socket state bits.  We don't support the latched
 327  * SocketState yet: I haven't seen any point for it.
 328  */
 329
 330 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
 331                       cs_status_t *status)
 332 {
 333         config_t *c;
 334         int val;
 335
 336         s->ops->get_status(s, &val);
 337         status->CardState = status->SocketState = 0;
 338         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 339         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 340         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 341         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 342         if (s->state & SOCKET_SUSPEND)
 343                 status->CardState |= CS_EVENT_PM_SUSPEND;
 344         if (!(s->state & SOCKET_PRESENT))
 345                 return CS_NO_CARD;
 346
 347         c = (s->config != NULL) ? &s->config[function] : NULL;
 348         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 349             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 350                 u_char reg;
 351                 if (c->Present & PRESENT_PIN_REPLACE) {
 352                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 353                         status->CardState |=
 354                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 355                         status->CardState |=
 356                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 357                         status->CardState |=
 358                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 359                         status->CardState |=
 360                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 361                 } else {
 362                         /* No PRR?  Then assume we're always ready */
 363                         status->CardState |= CS_EVENT_READY_CHANGE;
 364                 }
 365                 if (c->Present & PRESENT_EXT_STATUS) {
 366                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 367                         status->CardState |=
 368                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 369                 }
 370                 return CS_SUCCESS;
 371         }
 372         status->CardState |=
 373                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 374         status->CardState |=
 375                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 376         status->CardState |=
 377                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 378         status->CardState |=
 379                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 380         return CS_SUCCESS;
 381 } /* pccard_get_status */
 382 EXPORT_SYMBOL(pccard_get_status);
 383
 384
 385 /** pcmcia_get_mem_page
 386  *
 387  * Change the card address of an already open memory window.
 388  */
 389 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 390 {
 391         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 392                 return CS_BAD_HANDLE;
 393         req->Page = 0;
 394         req->CardOffset = win->ctl.card_start;
 395         return CS_SUCCESS;
 396 } /* pcmcia_get_mem_page */
 397 EXPORT_SYMBOL(pcmcia_get_mem_page);
 398
 399
 400 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 401 {
 402         struct pcmcia_socket *s;
 403         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 404                 return CS_BAD_HANDLE;
 405         if (req->Page != 0)
 406                 return CS_BAD_PAGE;
 407         s = win->sock;
 408         win->ctl.card_start = req->CardOffset;
 409         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 410                 return CS_BAD_OFFSET;
 411         return CS_SUCCESS;
 412 } /* pcmcia_map_mem_page */
 413 EXPORT_SYMBOL(pcmcia_map_mem_page);
 414
 415
 416 /** pcmcia_modify_configuration
 417  *
 418  * Modify a locked socket configuration
 419  */
 420 int pcmcia_modify_configuration(client_handle_t handle,
 421                                 modconf_t *mod)
 422 {
 423         struct pcmcia_socket *s;
 424         config_t *c;
 425
 426         if (CHECK_HANDLE(handle))
 427                 return CS_BAD_HANDLE;
 428         s = SOCKET(handle);
 429         c = CONFIG(handle);
 430         if (!(s->state & SOCKET_PRESENT))
 431                 return CS_NO_CARD;
 432         if (!(c->state & CONFIG_LOCKED))
 433                 return CS_CONFIGURATION_LOCKED;
 434
 435         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 436                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 437                         c->Attributes |= CONF_ENABLE_IRQ;
 438                         s->socket.io_irq = s->irq.AssignedIRQ;
 439                 } else {
 440                         c->Attributes &= ~CONF_ENABLE_IRQ;
 441                         s->socket.io_irq = 0;
 442                 }
 443                 s->ops->set_socket(s, &s->socket);
 444         }
 445
 446         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 447                 return CS_BAD_VCC;
 448
 449         /* We only allow changing Vpp1 and Vpp2 to the same value */
 450         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 451             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 452                 if (mod->Vpp1 != mod->Vpp2)
 453                         return CS_BAD_VPP;
 454                 c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
 455                 if (s->ops->set_socket(s, &s->socket))
 456                         return CS_BAD_VPP;
 457         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 458                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 459                 return CS_BAD_VPP;
 460
 461         return CS_SUCCESS;
 462 } /* modify_configuration */
 463 EXPORT_SYMBOL(pcmcia_modify_configuration);
 464
 465
 466 int pcmcia_release_configuration(client_handle_t handle)
 467 {
 468         pccard_io_map io = { 0, 0, 0, 0, 1 };
 469         struct pcmcia_socket *s;
 470         int i;
 471
 472         if (CHECK_HANDLE(handle) ||
 473             !(handle->state & CLIENT_CONFIG_LOCKED))
 474                 return CS_BAD_HANDLE;
 475         handle->state &= ~CLIENT_CONFIG_LOCKED;
 476         s = SOCKET(handle);
 477
 478 #ifdef CONFIG_CARDBUS
 479         if (handle->state & CLIENT_CARDBUS)
 480                 return CS_SUCCESS;
 481 #endif
 482
 483         if (!(handle->state & CLIENT_STALE)) {
 484                 config_t *c = CONFIG(handle);
 485                 if (--(s->lock_count) == 0) {
 486                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 487                         s->socket.Vpp = 0;
 488                         s->socket.io_irq = 0;
 489                         s->ops->set_socket(s, &s->socket);
 490                 }
 491                 if (c->state & CONFIG_IO_REQ)
 492                         for (i = 0; i < MAX_IO_WIN; i++) {
 493                                 if (s->io[i].NumPorts == 0)
 494                                         continue;
 495                                 s->io[i].Config--;
 496                                 if (s->io[i].Config != 0)
 497                                         continue;
 498                                 io.map = i;
 499                                 s->ops->set_io_map(s, &io);
 500                         }
 501                 c->state &= ~CONFIG_LOCKED;
 502         }
 503
 504         return CS_SUCCESS;
 505 } /* pcmcia_release_configuration */
 506 EXPORT_SYMBOL(pcmcia_release_configuration);
 507
 508
 509 /** pcmcia_release_io
 510  *
 511  * Release_io() releases the I/O ranges allocated by a client.  This
 512  * may be invoked some time after a card ejection has already dumped
 513  * the actual socket configuration, so if the client is "stale", we
 514  * don't bother checking the port ranges against the current socket
 515  * values.
 516  */
 517 int pcmcia_release_io(client_handle_t handle, io_req_t *req)
 518 {
 519         struct pcmcia_socket *s;
 520
 521         if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IO_REQ))
 522                 return CS_BAD_HANDLE;
 523         handle->state &= ~CLIENT_IO_REQ;
 524         s = SOCKET(handle);
 525
 526 #ifdef CONFIG_CARDBUS
 527         if (handle->state & CLIENT_CARDBUS)
 528                 return CS_SUCCESS;
 529 #endif
 530
 531         if (!(handle->state & CLIENT_STALE)) {
 532                 config_t *c = CONFIG(handle);
 533                 if (c->state & CONFIG_LOCKED)
 534                         return CS_CONFIGURATION_LOCKED;
 535                 if ((c->io.BasePort1 != req->BasePort1) ||
 536                     (c->io.NumPorts1 != req->NumPorts1) ||
 537                     (c->io.BasePort2 != req->BasePort2) ||
 538                     (c->io.NumPorts2 != req->NumPorts2))
 539                         return CS_BAD_ARGS;
 540                 c->state &= ~CONFIG_IO_REQ;
 541         }
 542
 543         release_io_space(s, req->BasePort1, req->NumPorts1);
 544         if (req->NumPorts2)
 545                 release_io_space(s, req->BasePort2, req->NumPorts2);
 546
 547         return CS_SUCCESS;
 548 } /* pcmcia_release_io */
 549 EXPORT_SYMBOL(pcmcia_release_io);
 550
 551
 552 int pcmcia_release_irq(client_handle_t handle, irq_req_t *req)
 553 {
 554         struct pcmcia_socket *s;
 555         if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IRQ_REQ))
 556                 return CS_BAD_HANDLE;
 557         handle->state &= ~CLIENT_IRQ_REQ;
 558         s = SOCKET(handle);
 559
 560         if (!(handle->state & CLIENT_STALE)) {
 561                 config_t *c = CONFIG(handle);
 562                 if (c->state & CONFIG_LOCKED)
 563                         return CS_CONFIGURATION_LOCKED;
 564                 if (c->irq.Attributes != req->Attributes)
 565                         return CS_BAD_ATTRIBUTE;
 566                 if (s->irq.AssignedIRQ != req->AssignedIRQ)
 567                         return CS_BAD_IRQ;
 568                 if (--s->irq.Config == 0) {
 569                         c->state &= ~CONFIG_IRQ_REQ;
 570                         s->irq.AssignedIRQ = 0;
 571                 }
 572         }
 573
 574         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 575                 free_irq(req->AssignedIRQ, req->Instance);
 576         }
 577
 578 #ifdef CONFIG_PCMCIA_PROBE
 579         pcmcia_used_irq[req->AssignedIRQ]--;
 580 #endif
 581
 582         return CS_SUCCESS;
 583 } /* pcmcia_release_irq */
 584 EXPORT_SYMBOL(pcmcia_release_irq);
 585
 586
 587 int pcmcia_release_window(window_handle_t win)
 588 {
 589         struct pcmcia_socket *s;
 590
 591         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 592                 return CS_BAD_HANDLE;
 593         s = win->sock;
 594         if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
 595                 return CS_BAD_HANDLE;
 596
 597         /* Shut down memory window */
 598         win->ctl.flags &= ~MAP_ACTIVE;
 599         s->ops->set_mem_map(s, &win->ctl);
 600         s->state &= ~SOCKET_WIN_REQ(win->index);
 601
 602         /* Release system memory */
 603         if (win->ctl.res) {
 604                 release_resource(win->ctl.res);
 605                 kfree(win->ctl.res);
 606                 win->ctl.res = NULL;
 607         }
 608         win->handle->state &= ~CLIENT_WIN_REQ(win->index);
 609
 610         win->magic = 0;
 611
 612         return CS_SUCCESS;
 613 } /* pcmcia_release_window */
 614 EXPORT_SYMBOL(pcmcia_release_window);
 615
 616
 617 int pcmcia_request_configuration(client_handle_t handle,
 618                                  config_req_t *req)
 619 {
 620         int i;
 621         u_int base;
 622         struct pcmcia_socket *s;
 623         config_t *c;
 624         pccard_io_map iomap;
 625
 626         if (CHECK_HANDLE(handle))
 627                 return CS_BAD_HANDLE;
 628         s = SOCKET(handle);
 629         if (!(s->state & SOCKET_PRESENT))
 630                 return CS_NO_CARD;
 631
 632 #ifdef CONFIG_CARDBUS
 633         if (handle->state & CLIENT_CARDBUS)
 634                 return CS_UNSUPPORTED_MODE;
 635 #endif
 636
 637         if (req->IntType & INT_CARDBUS)
 638                 return CS_UNSUPPORTED_MODE;
 639         c = CONFIG(handle);
 640         if (c->state & CONFIG_LOCKED)
 641                 return CS_CONFIGURATION_LOCKED;
 642
 643         /* Do power control.  We don't allow changes in Vcc. */
 644         if (s->socket.Vcc != req->Vcc)
 645                 return CS_BAD_VCC;
 646         if (req->Vpp1 != req->Vpp2)
 647                 return CS_BAD_VPP;
 648         s->socket.Vpp = req->Vpp1;
 649         if (s->ops->set_socket(s, &s->socket))
 650                 return CS_BAD_VPP;
 651
 652         c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
 653
 654         /* Pick memory or I/O card, DMA mode, interrupt */
 655         c->IntType = req->IntType;
 656         c->Attributes = req->Attributes;
 657         if (req->IntType & INT_MEMORY_AND_IO)
 658                 s->socket.flags |= SS_IOCARD;
 659         if (req->IntType & INT_ZOOMED_VIDEO)
 660                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 661         if (req->Attributes & CONF_ENABLE_DMA)
 662                 s->socket.flags |= SS_DMA_MODE;
 663         if (req->Attributes & CONF_ENABLE_SPKR)
 664                 s->socket.flags |= SS_SPKR_ENA;
 665         if (req->Attributes & CONF_ENABLE_IRQ)
 666                 s->socket.io_irq = s->irq.AssignedIRQ;
 667         else
 668                 s->socket.io_irq = 0;
 669         s->ops->set_socket(s, &s->socket);
 670         s->lock_count++;
 671
 672         /* Set up CIS configuration registers */
 673         base = c->ConfigBase = req->ConfigBase;
 674         c->Present = c->CardValues = req->Present;
 675         if (req->Present & PRESENT_COPY) {
 676                 c->Copy = req->Copy;
 677                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 678         }
 679         if (req->Present & PRESENT_OPTION) {
 680                 if (s->functions == 1) {
 681                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 682                 } else {
 683                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 684                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 685                         if (req->Present & PRESENT_IOBASE_0)
 686                                 c->Option |= COR_ADDR_DECODE;
 687                 }
 688                 if (c->state & CONFIG_IRQ_REQ)
 689                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 690                                 c->Option |= COR_LEVEL_REQ;
 691                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 692                 mdelay(40);
 693         }
 694         if (req->Present & PRESENT_STATUS) {
 695                 c->Status = req->Status;
 696                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 697         }
 698         if (req->Present & PRESENT_PIN_REPLACE) {
 699                 c->Pin = req->Pin;
 700                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 701         }
 702         if (req->Present & PRESENT_EXT_STATUS) {
 703                 c->ExtStatus = req->ExtStatus;
 704                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 705         }
 706         if (req->Present & PRESENT_IOBASE_0) {
 707                 u_char b = c->io.BasePort1 & 0xff;
 708                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 709                 b = (c->io.BasePort1 >> 8) & 0xff;
 710                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 711         }
 712         if (req->Present & PRESENT_IOSIZE) {
 713                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 714                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 715         }
 716
 717         /* Configure I/O windows */
 718         if (c->state & CONFIG_IO_REQ) {
 719                 iomap.speed = io_speed;
 720                 for (i = 0; i < MAX_IO_WIN; i++)
 721                         if (s->io[i].NumPorts != 0) {
 722                                 iomap.map = i;
 723                                 iomap.flags = MAP_ACTIVE;
 724                                 switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
 725                                 case IO_DATA_PATH_WIDTH_16:
 726                                         iomap.flags |= MAP_16BIT; break;
 727                                 case IO_DATA_PATH_WIDTH_AUTO:
 728                                         iomap.flags |= MAP_AUTOSZ; break;
 729                                 default:
 730                                         break;
 731                                 }
 732                                 iomap.start = s->io[i].BasePort;
 733                                 iomap.stop = iomap.start + s->io[i].NumPorts - 1;
 734                                 s->ops->set_io_map(s, &iomap);
 735                                 s->io[i].Config++;
 736                         }
 737         }
 738
 739         c->state |= CONFIG_LOCKED;
 740         handle->state |= CLIENT_CONFIG_LOCKED;
 741         return CS_SUCCESS;
 742 } /* pcmcia_request_configuration */
 743 EXPORT_SYMBOL(pcmcia_request_configuration);
 744
 745
 746 /** pcmcia_request_io
 747  *
 748  * Request_io() reserves ranges of port addresses for a socket.
 749  * I have not implemented range sharing or alias addressing.
 750  */
 751 int pcmcia_request_io(client_handle_t handle, io_req_t *req)
 752 {
 753         struct pcmcia_socket *s;
 754         config_t *c;
 755
 756         if (CHECK_HANDLE(handle))
 757                 return CS_BAD_HANDLE;
 758         s = SOCKET(handle);
 759         if (!(s->state & SOCKET_PRESENT))
 760                 return CS_NO_CARD;
 761
 762         if (handle->state & CLIENT_CARDBUS) {
 763 #ifdef CONFIG_CARDBUS
 764                 handle->state |= CLIENT_IO_REQ;
 765                 return CS_SUCCESS;
 766 #else
 767                 return CS_UNSUPPORTED_FUNCTION;
 768 #endif
 769         }
 770
 771         if (!req)
 772                 return CS_UNSUPPORTED_MODE;
 773         c = CONFIG(handle);
 774         if (c->state & CONFIG_LOCKED)
 775                 return CS_CONFIGURATION_LOCKED;
 776         if (c->state & CONFIG_IO_REQ)
 777                 return CS_IN_USE;
 778         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 779                 return CS_BAD_ATTRIBUTE;
 780         if ((req->NumPorts2 > 0) &&
 781             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 782                 return CS_BAD_ATTRIBUTE;
 783
 784         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 785                            req->NumPorts1, req->IOAddrLines))
 786                 return CS_IN_USE;
 787
 788         if (req->NumPorts2) {
 789                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 790                                    req->NumPorts2, req->IOAddrLines)) {
 791                         release_io_space(s, req->BasePort1, req->NumPorts1);
 792                         return CS_IN_USE;
 793                 }
 794         }
 795
 796         c->io = *req;
 797         c->state |= CONFIG_IO_REQ;
 798         handle->state |= CLIENT_IO_REQ;
 799         return CS_SUCCESS;
 800 } /* pcmcia_request_io */
 801 EXPORT_SYMBOL(pcmcia_request_io);
 802
 803
 804 /** pcmcia_request_irq
 805  *
 806  * Request_irq() reserves an irq for this client.
 807  *
 808  * Also, since Linux only reserves irq's when they are actually
 809  * hooked, we don't guarantee that an irq will still be available
 810  * when the configuration is locked.  Now that I think about it,
 811  * there might be a way to fix this using a dummy handler.
 812  */
 813
 814 #ifdef CONFIG_PCMCIA_PROBE
 815 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
 816 {
 817         return IRQ_NONE;
 818 }
 819 #endif
 820
 821 int pcmcia_request_irq(client_handle_t handle, irq_req_t *req)
 822 {
 823         struct pcmcia_socket *s;
 824         config_t *c;
 825         int ret = CS_IN_USE, irq = 0;
 826         struct pcmcia_device *p_dev = handle_to_pdev(handle);
 827
 828         if (CHECK_HANDLE(handle))
 829                 return CS_BAD_HANDLE;
 830         s = SOCKET(handle);
 831         if (!(s->state & SOCKET_PRESENT))
 832                 return CS_NO_CARD;
 833         c = CONFIG(handle);
 834         if (c->state & CONFIG_LOCKED)
 835                 return CS_CONFIGURATION_LOCKED;
 836         if (c->state & CONFIG_IRQ_REQ)
 837                 return CS_IN_USE;
 838
 839 #ifdef CONFIG_PCMCIA_PROBE
 840         if (s->irq.AssignedIRQ != 0) {
 841                 /* If the interrupt is already assigned, it must be the same */
 842                 irq = s->irq.AssignedIRQ;
 843         } else {
 844                 int try;
 845                 u32 mask = s->irq_mask;
 846                 void *data = NULL;
 847
 848                 for (try = 0; try < 64; try++) {
 849                         irq = try % 32;
 850
 851                         /* marked as available by driver, and not blocked by userspace? */
 852                         if (!((mask >> irq) & 1))
 853                                 continue;
 854
 855                         /* avoid an IRQ which is already used by a PCMCIA card */
 856                         if ((try < 32) && pcmcia_used_irq[irq])
 857                                 continue;
 858
 859                         /* register the correct driver, if possible, of check whether
 860                          * registering a dummy handle works, i.e. if the IRQ isn't
 861                          * marked as used by the kernel resource management core */
 862                         ret = request_irq(irq,
 863                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 864                                           ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 865                                            (s->functions > 1) ||
 866                                            (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 867                                           p_dev->dev.bus_id,
 868                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 869                         if (!ret) {
 870                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 871                                         free_irq(irq, data);
 872                                 break;
 873                         }
 874                 }
 875         }
 876 #endif
 877         if (ret) {
 878                 if (!s->pci_irq)
 879                         return ret;
 880                 irq = s->pci_irq;
 881         }
 882
 883         if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
 884                 if (request_irq(irq, req->Handler,
 885                                 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 886                                  (s->functions > 1) ||
 887                                  (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 888                                 p_dev->dev.bus_id, req->Instance))
 889                         return CS_IN_USE;
 890         }
 891
 892         c->irq.Attributes = req->Attributes;
 893         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 894         s->irq.Config++;
 895
 896         c->state |= CONFIG_IRQ_REQ;
 897         handle->state |= CLIENT_IRQ_REQ;
 898
 899 #ifdef CONFIG_PCMCIA_PROBE
 900         pcmcia_used_irq[irq]++;
 901 #endif
 902
 903         return CS_SUCCESS;
 904 } /* pcmcia_request_irq */
 905 EXPORT_SYMBOL(pcmcia_request_irq);
 906
 907
 908 /** pcmcia_request_window
 909  *
 910  * Request_window() establishes a mapping between card memory space
 911  * and system memory space.
 912  */
 913 int pcmcia_request_window(client_handle_t *handle, win_req_t *req, window_handle_t *wh)
 914 {
 915         struct pcmcia_socket *s;
 916         window_t *win;
 917         u_long align;
 918         int w;
 919
 920         if (CHECK_HANDLE(*handle))
 921                 return CS_BAD_HANDLE;
 922         s = (*handle)->Socket;
 923         if (!(s->state & SOCKET_PRESENT))
 924                 return CS_NO_CARD;
 925         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 926                 return CS_BAD_ATTRIBUTE;
 927
 928         /* Window size defaults to smallest available */
 929         if (req->Size == 0)
 930                 req->Size = s->map_size;
 931         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 932                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 933                  req->Size : s->map_size);
 934         if (req->Size & (s->map_size-1))
 935                 return CS_BAD_SIZE;
 936         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 937             (req->Base & (align-1)))
 938                 return CS_BAD_BASE;
 939         if (req->Base)
 940                 align = 0;
 941
 942         /* Allocate system memory window */
 943         for (w = 0; w < MAX_WIN; w++)
 944                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 945         if (w == MAX_WIN)
 946                 return CS_OUT_OF_RESOURCE;
 947
 948         win = &s->win[w];
 949         win->magic = WINDOW_MAGIC;
 950         win->index = w;
 951         win->handle = *handle;
 952         win->sock = s;
 953
 954         if (!(s->features & SS_CAP_STATIC_MAP)) {
 955                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 956                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 957                 if (!win->ctl.res)
 958                         return CS_IN_USE;
 959         }
 960         (*handle)->state |= CLIENT_WIN_REQ(w);
 961
 962         /* Configure the socket controller */
 963         win->ctl.map = w+1;
 964         win->ctl.flags = 0;
 965         win->ctl.speed = req->AccessSpeed;
 966         if (req->Attributes & WIN_MEMORY_TYPE)
 967                 win->ctl.flags |= MAP_ATTRIB;
 968         if (req->Attributes & WIN_ENABLE)
 969                 win->ctl.flags |= MAP_ACTIVE;
 970         if (req->Attributes & WIN_DATA_WIDTH_16)
 971                 win->ctl.flags |= MAP_16BIT;
 972         if (req->Attributes & WIN_USE_WAIT)
 973                 win->ctl.flags |= MAP_USE_WAIT;
 974         win->ctl.card_start = 0;
 975         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 976                 return CS_BAD_ARGS;
 977         s->state |= SOCKET_WIN_REQ(w);
 978
 979         /* Return window handle */
 980         if (s->features & SS_CAP_STATIC_MAP) {
 981                 req->Base = win->ctl.static_start;
 982         } else {
 983                 req->Base = win->ctl.res->start;
 984         }
 985         *wh = win;
 986
 987         return CS_SUCCESS;
 988 } /* pcmcia_request_window */
 989 EXPORT_SYMBOL(pcmcia_request_window);