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 /* Access speed for IO windows */
  40 static int io_speed = 0;
  41 module_param(io_speed, int, 0444);
  42
  43
  44 #ifdef CONFIG_PCMCIA_PROBE
  45 /* mask of IRQs already reserved by other cards, we should avoid using them */
  46 static u8 pcmcia_used_irq[NR_IRQS];
  47 #endif
  48
  49
  50 #ifdef DEBUG
  51 extern int ds_pc_debug;
  52 #define cs_socket_name(skt)    ((skt)->dev.class_id)
  53
  54 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  55         if (ds_pc_debug >= lvl)                                 \
  56                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  57                         cs_socket_name(skt) , ## arg);          \
  58 } while (0)
  59 #else
  60 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  61 #endif
  62
  63
  64
  65 /** alloc_io_space
  66  *
  67  * Special stuff for managing IO windows, because they are scarce
  68  */
  69
  70 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
  71                           ioaddr_t num, u_int lines)
  72 {
  73         int i;
  74         kio_addr_t try, align;
  75
  76         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  77         if (align && (align < num)) {
  78                 if (*base) {
  79                         ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
  80                                num, align);
  81                         align = 0;
  82                 } else
  83                         while (align && (align < num)) align <<= 1;
  84         }
  85         if (*base & ~(align-1)) {
  86                 ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
  87                        *base, align);
  88                 align = 0;
  89         }
  90         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  91                 *base = s->io_offset | (*base & 0x0fff);
  92                 return 0;
  93         }
  94         /* Check for an already-allocated window that must conflict with
  95          * what was asked for.  It is a hack because it does not catch all
  96          * potential conflicts, just the most obvious ones.
  97          */
  98         for (i = 0; i < MAX_IO_WIN; i++)
  99                 if ((s->io[i].NumPorts != 0) &&
 100                     ((s->io[i].BasePort & (align-1)) == *base))
 101                         return 1;
 102         for (i = 0; i < MAX_IO_WIN; i++) {
 103                 if (s->io[i].NumPorts == 0) {
 104                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 105                         if (s->io[i].res) {
 106                                 s->io[i].Attributes = attr;
 107                                 s->io[i].BasePort = *base = s->io[i].res->start;
 108                                 s->io[i].NumPorts = s->io[i].InUse = num;
 109                                 break;
 110                         } else
 111                                 return 1;
 112                 } else if (s->io[i].Attributes != attr)
 113                         continue;
 114                 /* Try to extend top of window */
 115                 try = s->io[i].BasePort + s->io[i].NumPorts;
 116                 if ((*base == 0) || (*base == try))
 117                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 118                                                     s->io[i].res->end + num, s) == 0) {
 119                                 *base = try;
 120                                 s->io[i].NumPorts += num;
 121                                 s->io[i].InUse += num;
 122                                 break;
 123                         }
 124                 /* Try to extend bottom of window */
 125                 try = s->io[i].BasePort - num;
 126                 if ((*base == 0) || (*base == try))
 127                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 128                                                     s->io[i].res->end, s) == 0) {
 129                                 s->io[i].BasePort = *base = try;
 130                                 s->io[i].NumPorts += num;
 131                                 s->io[i].InUse += num;
 132                                 break;
 133                         }
 134         }
 135         return (i == MAX_IO_WIN);
 136 } /* alloc_io_space */
 137
 138
 139 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
 140                              ioaddr_t num)
 141 {
 142         int i;
 143
 144         for (i = 0; i < MAX_IO_WIN; i++) {
 145                 if ((s->io[i].BasePort <= base) &&
 146                     (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
 147                         s->io[i].InUse -= num;
 148                         /* Free the window if no one else is using it */
 149                         if (s->io[i].InUse == 0) {
 150                                 s->io[i].NumPorts = 0;
 151                                 release_resource(s->io[i].res);
 152                                 kfree(s->io[i].res);
 153                                 s->io[i].res = NULL;
 154                         }
 155                 }
 156         }
 157 } /* release_io_space */
 158
 159
 160 /** pccard_access_configuration_register
 161  *
 162  * Access_configuration_register() reads and writes configuration
 163  * registers in attribute memory.  Memory window 0 is reserved for
 164  * this and the tuple reading services.
 165  */
 166
 167 int pccard_access_configuration_register(struct pcmcia_socket *s,
 168                                          unsigned int function,
 169                                          conf_reg_t *reg)
 170 {
 171         config_t *c;
 172         int addr;
 173         u_char val;
 174
 175         if (!s || !s->config)
 176                 return CS_NO_CARD;
 177
 178         c = &s->config[function];
 179
 180         if (c == NULL)
 181                 return CS_NO_CARD;
 182
 183         if (!(c->state & CONFIG_LOCKED))
 184                 return CS_CONFIGURATION_LOCKED;
 185
 186         addr = (c->ConfigBase + reg->Offset) >> 1;
 187
 188         switch (reg->Action) {
 189         case CS_READ:
 190                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 191                 reg->Value = val;
 192                 break;
 193         case CS_WRITE:
 194                 val = reg->Value;
 195                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 196                 break;
 197         default:
 198                 return CS_BAD_ARGS;
 199                 break;
 200         }
 201         return CS_SUCCESS;
 202 } /* pccard_access_configuration_register */
 203
 204 int pcmcia_access_configuration_register(client_handle_t handle,
 205                                          conf_reg_t *reg)
 206 {
 207         struct pcmcia_socket *s;
 208         if (CHECK_HANDLE(handle))
 209                 return CS_BAD_HANDLE;
 210         s = SOCKET(handle);
 211         return pccard_access_configuration_register(s, handle->Function, reg);
 212 }
 213 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 214
 215
 216
 217 int pccard_get_configuration_info(struct pcmcia_socket *s,
 218                                   unsigned int function,
 219                                   config_info_t *config)
 220 {
 221         config_t *c;
 222
 223         if (!(s->state & SOCKET_PRESENT))
 224                 return CS_NO_CARD;
 225
 226         config->Function = function;
 227
 228 #ifdef CONFIG_CARDBUS
 229         if (s->state & SOCKET_CARDBUS) {
 230                 memset(config, 0, sizeof(config_info_t));
 231                 config->Vcc = s->socket.Vcc;
 232                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 233                 config->Option = s->cb_dev->subordinate->number;
 234                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 235                         config->Attributes = CONF_VALID_CLIENT;
 236                         config->IntType = INT_CARDBUS;
 237                         config->AssignedIRQ = s->irq.AssignedIRQ;
 238                         if (config->AssignedIRQ)
 239                                 config->Attributes |= CONF_ENABLE_IRQ;
 240                         config->BasePort1 = s->io[0].BasePort;
 241                         config->NumPorts1 = s->io[0].NumPorts;
 242                 }
 243                 return CS_SUCCESS;
 244         }
 245 #endif
 246
 247         c = (s->config != NULL) ? &s->config[function] : NULL;
 248
 249         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 250                 config->Attributes = 0;
 251                 config->Vcc = s->socket.Vcc;
 252                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 253                 return CS_SUCCESS;
 254         }
 255
 256         /* !!! This is a hack !!! */
 257         memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
 258         config->Attributes |= CONF_VALID_CLIENT;
 259         config->CardValues = c->CardValues;
 260         config->IRQAttributes = c->irq.Attributes;
 261         config->AssignedIRQ = s->irq.AssignedIRQ;
 262         config->BasePort1 = c->io.BasePort1;
 263         config->NumPorts1 = c->io.NumPorts1;
 264         config->Attributes1 = c->io.Attributes1;
 265         config->BasePort2 = c->io.BasePort2;
 266         config->NumPorts2 = c->io.NumPorts2;
 267         config->Attributes2 = c->io.Attributes2;
 268         config->IOAddrLines = c->io.IOAddrLines;
 269
 270         return CS_SUCCESS;
 271 } /* pccard_get_configuration_info */
 272
 273 int pcmcia_get_configuration_info(client_handle_t handle,
 274                                   config_info_t *config)
 275 {
 276         struct pcmcia_socket *s;
 277
 278         if ((CHECK_HANDLE(handle)) || !config)
 279                 return CS_BAD_HANDLE;
 280         s = SOCKET(handle);
 281         if (!s)
 282                 return CS_BAD_HANDLE;
 283         return pccard_get_configuration_info(s, handle->Function, config);
 284 }
 285 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 286
 287
 288 /** pcmcia_get_window
 289  */
 290 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 291                       int idx, win_req_t *req)
 292 {
 293         window_t *win;
 294         int w;
 295
 296         if (!s || !(s->state & SOCKET_PRESENT))
 297                 return CS_NO_CARD;
 298         for (w = idx; w < MAX_WIN; w++)
 299                 if (s->state & SOCKET_WIN_REQ(w))
 300                         break;
 301         if (w == MAX_WIN)
 302                 return CS_NO_MORE_ITEMS;
 303         win = &s->win[w];
 304         req->Base = win->ctl.res->start;
 305         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 306         req->AccessSpeed = win->ctl.speed;
 307         req->Attributes = 0;
 308         if (win->ctl.flags & MAP_ATTRIB)
 309                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 310         if (win->ctl.flags & MAP_ACTIVE)
 311                 req->Attributes |= WIN_ENABLE;
 312         if (win->ctl.flags & MAP_16BIT)
 313                 req->Attributes |= WIN_DATA_WIDTH_16;
 314         if (win->ctl.flags & MAP_USE_WAIT)
 315                 req->Attributes |= WIN_USE_WAIT;
 316         *handle = win;
 317         return CS_SUCCESS;
 318 } /* pcmcia_get_window */
 319 EXPORT_SYMBOL(pcmcia_get_window);
 320
 321
 322 /** pccard_get_status
 323  *
 324  * Get the current socket state bits.  We don't support the latched
 325  * SocketState yet: I haven't seen any point for it.
 326  */
 327
 328 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
 329                       cs_status_t *status)
 330 {
 331         config_t *c;
 332         int val;
 333
 334         s->ops->get_status(s, &val);
 335         status->CardState = status->SocketState = 0;
 336         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 337         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 338         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 339         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 340         if (s->state & SOCKET_SUSPEND)
 341                 status->CardState |= CS_EVENT_PM_SUSPEND;
 342         if (!(s->state & SOCKET_PRESENT))
 343                 return CS_NO_CARD;
 344
 345         c = (s->config != NULL) ? &s->config[function] : NULL;
 346         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 347             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 348                 u_char reg;
 349                 if (c->Present & PRESENT_PIN_REPLACE) {
 350                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 351                         status->CardState |=
 352                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 353                         status->CardState |=
 354                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 355                         status->CardState |=
 356                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 357                         status->CardState |=
 358                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 359                 } else {
 360                         /* No PRR?  Then assume we're always ready */
 361                         status->CardState |= CS_EVENT_READY_CHANGE;
 362                 }
 363                 if (c->Present & PRESENT_EXT_STATUS) {
 364                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 365                         status->CardState |=
 366                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 367                 }
 368                 return CS_SUCCESS;
 369         }
 370         status->CardState |=
 371                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 372         status->CardState |=
 373                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 374         status->CardState |=
 375                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 376         status->CardState |=
 377                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 378         return CS_SUCCESS;
 379 } /* pccard_get_status */
 380
 381 int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
 382 {
 383         struct pcmcia_socket *s;
 384         if (CHECK_HANDLE(handle))
 385                 return CS_BAD_HANDLE;
 386         s = SOCKET(handle);
 387         return pccard_get_status(s, handle->Function, status);
 388 }
 389 EXPORT_SYMBOL(pcmcia_get_status);
 390
 391
 392
 393 /** pcmcia_get_mem_page
 394  *
 395  * Change the card address of an already open memory window.
 396  */
 397 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 398 {
 399         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 400                 return CS_BAD_HANDLE;
 401         req->Page = 0;
 402         req->CardOffset = win->ctl.card_start;
 403         return CS_SUCCESS;
 404 } /* pcmcia_get_mem_page */
 405 EXPORT_SYMBOL(pcmcia_get_mem_page);
 406
 407
 408 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 409 {
 410         struct pcmcia_socket *s;
 411         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 412                 return CS_BAD_HANDLE;
 413         if (req->Page != 0)
 414                 return CS_BAD_PAGE;
 415         s = win->sock;
 416         win->ctl.card_start = req->CardOffset;
 417         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 418                 return CS_BAD_OFFSET;
 419         return CS_SUCCESS;
 420 } /* pcmcia_map_mem_page */
 421 EXPORT_SYMBOL(pcmcia_map_mem_page);
 422
 423
 424 /** pcmcia_modify_configuration
 425  *
 426  * Modify a locked socket configuration
 427  */
 428 int pcmcia_modify_configuration(client_handle_t handle,
 429                                 modconf_t *mod)
 430 {
 431         struct pcmcia_socket *s;
 432         config_t *c;
 433
 434         if (CHECK_HANDLE(handle))
 435                 return CS_BAD_HANDLE;
 436         s = SOCKET(handle);
 437         c = CONFIG(handle);
 438         if (!(s->state & SOCKET_PRESENT))
 439                 return CS_NO_CARD;
 440         if (!(c->state & CONFIG_LOCKED))
 441                 return CS_CONFIGURATION_LOCKED;
 442
 443         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 444                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 445                         c->Attributes |= CONF_ENABLE_IRQ;
 446                         s->socket.io_irq = s->irq.AssignedIRQ;
 447                 } else {
 448                         c->Attributes &= ~CONF_ENABLE_IRQ;
 449                         s->socket.io_irq = 0;
 450                 }
 451                 s->ops->set_socket(s, &s->socket);
 452         }
 453
 454         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 455                 return CS_BAD_VCC;
 456
 457         /* We only allow changing Vpp1 and Vpp2 to the same value */
 458         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 459             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 460                 if (mod->Vpp1 != mod->Vpp2)
 461                         return CS_BAD_VPP;
 462                 c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
 463                 if (s->ops->set_socket(s, &s->socket))
 464                         return CS_BAD_VPP;
 465         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 466                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 467                 return CS_BAD_VPP;
 468
 469         return CS_SUCCESS;
 470 } /* modify_configuration */
 471 EXPORT_SYMBOL(pcmcia_modify_configuration);
 472
 473
 474 int pcmcia_release_configuration(client_handle_t handle)
 475 {
 476         pccard_io_map io = { 0, 0, 0, 0, 1 };
 477         struct pcmcia_socket *s;
 478         int i;
 479
 480         if (CHECK_HANDLE(handle) ||
 481             !(handle->state & CLIENT_CONFIG_LOCKED))
 482                 return CS_BAD_HANDLE;
 483         handle->state &= ~CLIENT_CONFIG_LOCKED;
 484         s = SOCKET(handle);
 485
 486 #ifdef CONFIG_CARDBUS
 487         if (handle->state & CLIENT_CARDBUS)
 488                 return CS_SUCCESS;
 489 #endif
 490
 491         if (!(handle->state & CLIENT_STALE)) {
 492                 config_t *c = CONFIG(handle);
 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                 if (c->state & CONFIG_IO_REQ)
 500                         for (i = 0; i < MAX_IO_WIN; i++) {
 501                                 if (s->io[i].NumPorts == 0)
 502                                         continue;
 503                                 s->io[i].Config--;
 504                                 if (s->io[i].Config != 0)
 505                                         continue;
 506                                 io.map = i;
 507                                 s->ops->set_io_map(s, &io);
 508                         }
 509                 c->state &= ~CONFIG_LOCKED;
 510         }
 511
 512         return CS_SUCCESS;
 513 } /* pcmcia_release_configuration */
 514 EXPORT_SYMBOL(pcmcia_release_configuration);
 515
 516
 517 /** pcmcia_release_io
 518  *
 519  * Release_io() releases the I/O ranges allocated by a client.  This
 520  * may be invoked some time after a card ejection has already dumped
 521  * the actual socket configuration, so if the client is "stale", we
 522  * don't bother checking the port ranges against the current socket
 523  * values.
 524  */
 525 int pcmcia_release_io(client_handle_t handle, io_req_t *req)
 526 {
 527         struct pcmcia_socket *s;
 528
 529         if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IO_REQ))
 530                 return CS_BAD_HANDLE;
 531         handle->state &= ~CLIENT_IO_REQ;
 532         s = SOCKET(handle);
 533
 534 #ifdef CONFIG_CARDBUS
 535         if (handle->state & CLIENT_CARDBUS)
 536                 return CS_SUCCESS;
 537 #endif
 538
 539         if (!(handle->state & CLIENT_STALE)) {
 540                 config_t *c = CONFIG(handle);
 541                 if (c->state & CONFIG_LOCKED)
 542                         return CS_CONFIGURATION_LOCKED;
 543                 if ((c->io.BasePort1 != req->BasePort1) ||
 544                     (c->io.NumPorts1 != req->NumPorts1) ||
 545                     (c->io.BasePort2 != req->BasePort2) ||
 546                     (c->io.NumPorts2 != req->NumPorts2))
 547                         return CS_BAD_ARGS;
 548                 c->state &= ~CONFIG_IO_REQ;
 549         }
 550
 551         release_io_space(s, req->BasePort1, req->NumPorts1);
 552         if (req->NumPorts2)
 553                 release_io_space(s, req->BasePort2, req->NumPorts2);
 554
 555         return CS_SUCCESS;
 556 } /* pcmcia_release_io */
 557 EXPORT_SYMBOL(pcmcia_release_io);
 558
 559
 560 int pcmcia_release_irq(client_handle_t handle, irq_req_t *req)
 561 {
 562         struct pcmcia_socket *s;
 563         if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IRQ_REQ))
 564                 return CS_BAD_HANDLE;
 565         handle->state &= ~CLIENT_IRQ_REQ;
 566         s = SOCKET(handle);
 567
 568         if (!(handle->state & CLIENT_STALE)) {
 569                 config_t *c = CONFIG(handle);
 570                 if (c->state & CONFIG_LOCKED)
 571                         return CS_CONFIGURATION_LOCKED;
 572                 if (c->irq.Attributes != req->Attributes)
 573                         return CS_BAD_ATTRIBUTE;
 574                 if (s->irq.AssignedIRQ != req->AssignedIRQ)
 575                         return CS_BAD_IRQ;
 576                 if (--s->irq.Config == 0) {
 577                         c->state &= ~CONFIG_IRQ_REQ;
 578                         s->irq.AssignedIRQ = 0;
 579                 }
 580         }
 581
 582         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 583                 free_irq(req->AssignedIRQ, req->Instance);
 584         }
 585
 586 #ifdef CONFIG_PCMCIA_PROBE
 587         pcmcia_used_irq[req->AssignedIRQ]--;
 588 #endif
 589
 590         return CS_SUCCESS;
 591 } /* pcmcia_release_irq */
 592 EXPORT_SYMBOL(pcmcia_release_irq);
 593
 594
 595 int pcmcia_release_window(window_handle_t win)
 596 {
 597         struct pcmcia_socket *s;
 598
 599         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 600                 return CS_BAD_HANDLE;
 601         s = win->sock;
 602         if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
 603                 return CS_BAD_HANDLE;
 604
 605         /* Shut down memory window */
 606         win->ctl.flags &= ~MAP_ACTIVE;
 607         s->ops->set_mem_map(s, &win->ctl);
 608         s->state &= ~SOCKET_WIN_REQ(win->index);
 609
 610         /* Release system memory */
 611         if (win->ctl.res) {
 612                 release_resource(win->ctl.res);
 613                 kfree(win->ctl.res);
 614                 win->ctl.res = NULL;
 615         }
 616         win->handle->state &= ~CLIENT_WIN_REQ(win->index);
 617
 618         win->magic = 0;
 619
 620         return CS_SUCCESS;
 621 } /* pcmcia_release_window */
 622 EXPORT_SYMBOL(pcmcia_release_window);
 623
 624
 625 int pcmcia_request_configuration(client_handle_t handle,
 626                                  config_req_t *req)
 627 {
 628         int i;
 629         u_int base;
 630         struct pcmcia_socket *s;
 631         config_t *c;
 632         pccard_io_map iomap;
 633
 634         if (CHECK_HANDLE(handle))
 635                 return CS_BAD_HANDLE;
 636         s = SOCKET(handle);
 637         if (!(s->state & SOCKET_PRESENT))
 638                 return CS_NO_CARD;
 639
 640 #ifdef CONFIG_CARDBUS
 641         if (handle->state & CLIENT_CARDBUS)
 642                 return CS_UNSUPPORTED_MODE;
 643 #endif
 644
 645         if (req->IntType & INT_CARDBUS)
 646                 return CS_UNSUPPORTED_MODE;
 647         c = CONFIG(handle);
 648         if (c->state & CONFIG_LOCKED)
 649                 return CS_CONFIGURATION_LOCKED;
 650
 651         /* Do power control.  We don't allow changes in Vcc. */
 652         if (s->socket.Vcc != req->Vcc)
 653                 return CS_BAD_VCC;
 654         if (req->Vpp1 != req->Vpp2)
 655                 return CS_BAD_VPP;
 656         s->socket.Vpp = req->Vpp1;
 657         if (s->ops->set_socket(s, &s->socket))
 658                 return CS_BAD_VPP;
 659
 660         c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
 661
 662         /* Pick memory or I/O card, DMA mode, interrupt */
 663         c->IntType = req->IntType;
 664         c->Attributes = req->Attributes;
 665         if (req->IntType & INT_MEMORY_AND_IO)
 666                 s->socket.flags |= SS_IOCARD;
 667         if (req->IntType & INT_ZOOMED_VIDEO)
 668                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 669         if (req->Attributes & CONF_ENABLE_DMA)
 670                 s->socket.flags |= SS_DMA_MODE;
 671         if (req->Attributes & CONF_ENABLE_SPKR)
 672                 s->socket.flags |= SS_SPKR_ENA;
 673         if (req->Attributes & CONF_ENABLE_IRQ)
 674                 s->socket.io_irq = s->irq.AssignedIRQ;
 675         else
 676                 s->socket.io_irq = 0;
 677         s->ops->set_socket(s, &s->socket);
 678         s->lock_count++;
 679
 680         /* Set up CIS configuration registers */
 681         base = c->ConfigBase = req->ConfigBase;
 682         c->Present = c->CardValues = req->Present;
 683         if (req->Present & PRESENT_COPY) {
 684                 c->Copy = req->Copy;
 685                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 686         }
 687         if (req->Present & PRESENT_OPTION) {
 688                 if (s->functions == 1) {
 689                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 690                 } else {
 691                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 692                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 693                         if (req->Present & PRESENT_IOBASE_0)
 694                                 c->Option |= COR_ADDR_DECODE;
 695                 }
 696                 if (c->state & CONFIG_IRQ_REQ)
 697                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 698                                 c->Option |= COR_LEVEL_REQ;
 699                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 700                 mdelay(40);
 701         }
 702         if (req->Present & PRESENT_STATUS) {
 703                 c->Status = req->Status;
 704                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 705         }
 706         if (req->Present & PRESENT_PIN_REPLACE) {
 707                 c->Pin = req->Pin;
 708                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 709         }
 710         if (req->Present & PRESENT_EXT_STATUS) {
 711                 c->ExtStatus = req->ExtStatus;
 712                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 713         }
 714         if (req->Present & PRESENT_IOBASE_0) {
 715                 u_char b = c->io.BasePort1 & 0xff;
 716                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 717                 b = (c->io.BasePort1 >> 8) & 0xff;
 718                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 719         }
 720         if (req->Present & PRESENT_IOSIZE) {
 721                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 722                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 723         }
 724
 725         /* Configure I/O windows */
 726         if (c->state & CONFIG_IO_REQ) {
 727                 iomap.speed = io_speed;
 728                 for (i = 0; i < MAX_IO_WIN; i++)
 729                         if (s->io[i].NumPorts != 0) {
 730                                 iomap.map = i;
 731                                 iomap.flags = MAP_ACTIVE;
 732                                 switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
 733                                 case IO_DATA_PATH_WIDTH_16:
 734                                         iomap.flags |= MAP_16BIT; break;
 735                                 case IO_DATA_PATH_WIDTH_AUTO:
 736                                         iomap.flags |= MAP_AUTOSZ; break;
 737                                 default:
 738                                         break;
 739                                 }
 740                                 iomap.start = s->io[i].BasePort;
 741                                 iomap.stop = iomap.start + s->io[i].NumPorts - 1;
 742                                 s->ops->set_io_map(s, &iomap);
 743                                 s->io[i].Config++;
 744                         }
 745         }
 746
 747         c->state |= CONFIG_LOCKED;
 748         handle->state |= CLIENT_CONFIG_LOCKED;
 749         return CS_SUCCESS;
 750 } /* pcmcia_request_configuration */
 751 EXPORT_SYMBOL(pcmcia_request_configuration);
 752
 753
 754 /** pcmcia_request_io
 755  *
 756  * Request_io() reserves ranges of port addresses for a socket.
 757  * I have not implemented range sharing or alias addressing.
 758  */
 759 int pcmcia_request_io(client_handle_t handle, io_req_t *req)
 760 {
 761         struct pcmcia_socket *s;
 762         config_t *c;
 763
 764         if (CHECK_HANDLE(handle))
 765                 return CS_BAD_HANDLE;
 766         s = SOCKET(handle);
 767         if (!(s->state & SOCKET_PRESENT))
 768                 return CS_NO_CARD;
 769
 770         if (handle->state & CLIENT_CARDBUS) {
 771 #ifdef CONFIG_CARDBUS
 772                 handle->state |= CLIENT_IO_REQ;
 773                 return CS_SUCCESS;
 774 #else
 775                 return CS_UNSUPPORTED_FUNCTION;
 776 #endif
 777         }
 778
 779         if (!req)
 780                 return CS_UNSUPPORTED_MODE;
 781         c = CONFIG(handle);
 782         if (c->state & CONFIG_LOCKED)
 783                 return CS_CONFIGURATION_LOCKED;
 784         if (c->state & CONFIG_IO_REQ)
 785                 return CS_IN_USE;
 786         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 787                 return CS_BAD_ATTRIBUTE;
 788         if ((req->NumPorts2 > 0) &&
 789             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 790                 return CS_BAD_ATTRIBUTE;
 791
 792         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 793                            req->NumPorts1, req->IOAddrLines))
 794                 return CS_IN_USE;
 795
 796         if (req->NumPorts2) {
 797                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 798                                    req->NumPorts2, req->IOAddrLines)) {
 799                         release_io_space(s, req->BasePort1, req->NumPorts1);
 800                         return CS_IN_USE;
 801                 }
 802         }
 803
 804         c->io = *req;
 805         c->state |= CONFIG_IO_REQ;
 806         handle->state |= CLIENT_IO_REQ;
 807         return CS_SUCCESS;
 808 } /* pcmcia_request_io */
 809 EXPORT_SYMBOL(pcmcia_request_io);
 810
 811
 812 /** pcmcia_request_irq
 813  *
 814  * Request_irq() reserves an irq for this client.
 815  *
 816  * Also, since Linux only reserves irq's when they are actually
 817  * hooked, we don't guarantee that an irq will still be available
 818  * when the configuration is locked.  Now that I think about it,
 819  * there might be a way to fix this using a dummy handler.
 820  */
 821
 822 #ifdef CONFIG_PCMCIA_PROBE
 823 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
 824 {
 825         return IRQ_NONE;
 826 }
 827 #endif
 828
 829 int pcmcia_request_irq(client_handle_t handle, irq_req_t *req)
 830 {
 831         struct pcmcia_socket *s;
 832         config_t *c;
 833         int ret = CS_IN_USE, irq = 0;
 834         struct pcmcia_device *p_dev = handle_to_pdev(handle);
 835
 836         if (CHECK_HANDLE(handle))
 837                 return CS_BAD_HANDLE;
 838         s = SOCKET(handle);
 839         if (!(s->state & SOCKET_PRESENT))
 840                 return CS_NO_CARD;
 841         c = CONFIG(handle);
 842         if (c->state & CONFIG_LOCKED)
 843                 return CS_CONFIGURATION_LOCKED;
 844         if (c->state & CONFIG_IRQ_REQ)
 845                 return CS_IN_USE;
 846
 847 #ifdef CONFIG_PCMCIA_PROBE
 848         if (s->irq.AssignedIRQ != 0) {
 849                 /* If the interrupt is already assigned, it must be the same */
 850                 irq = s->irq.AssignedIRQ;
 851         } else {
 852                 int try;
 853                 u32 mask = s->irq_mask;
 854                 void *data = NULL;
 855
 856                 for (try = 0; try < 64; try++) {
 857                         irq = try % 32;
 858
 859                         /* marked as available by driver, and not blocked by userspace? */
 860                         if (!((mask >> irq) & 1))
 861                                 continue;
 862
 863                         /* avoid an IRQ which is already used by a PCMCIA card */
 864                         if ((try < 32) && pcmcia_used_irq[irq])
 865                                 continue;
 866
 867                         /* register the correct driver, if possible, of check whether
 868                          * registering a dummy handle works, i.e. if the IRQ isn't
 869                          * marked as used by the kernel resource management core */
 870                         ret = request_irq(irq,
 871                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 872                                           ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 873                                            (s->functions > 1) ||
 874                                            (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 875                                           p_dev->dev.bus_id,
 876                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 877                         if (!ret) {
 878                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 879                                         free_irq(irq, data);
 880                                 break;
 881                         }
 882                 }
 883         }
 884 #endif
 885         if (ret) {
 886                 if (!s->pci_irq)
 887                         return ret;
 888                 irq = s->pci_irq;
 889         }
 890
 891         if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
 892                 if (request_irq(irq, req->Handler,
 893                                 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 894                                  (s->functions > 1) ||
 895                                  (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 896                                 p_dev->dev.bus_id, req->Instance))
 897                         return CS_IN_USE;
 898         }
 899
 900         c->irq.Attributes = req->Attributes;
 901         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 902         s->irq.Config++;
 903
 904         c->state |= CONFIG_IRQ_REQ;
 905         handle->state |= CLIENT_IRQ_REQ;
 906
 907 #ifdef CONFIG_PCMCIA_PROBE
 908         pcmcia_used_irq[irq]++;
 909 #endif
 910
 911         return CS_SUCCESS;
 912 } /* pcmcia_request_irq */
 913 EXPORT_SYMBOL(pcmcia_request_irq);
 914
 915
 916 /** pcmcia_request_window
 917  *
 918  * Request_window() establishes a mapping between card memory space
 919  * and system memory space.
 920  */
 921 int pcmcia_request_window(client_handle_t *handle, win_req_t *req, window_handle_t *wh)
 922 {
 923         struct pcmcia_socket *s;
 924         window_t *win;
 925         u_long align;
 926         int w;
 927
 928         if (CHECK_HANDLE(*handle))
 929                 return CS_BAD_HANDLE;
 930         s = (*handle)->Socket;
 931         if (!(s->state & SOCKET_PRESENT))
 932                 return CS_NO_CARD;
 933         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 934                 return CS_BAD_ATTRIBUTE;
 935
 936         /* Window size defaults to smallest available */
 937         if (req->Size == 0)
 938                 req->Size = s->map_size;
 939         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 940                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 941                  req->Size : s->map_size);
 942         if (req->Size & (s->map_size-1))
 943                 return CS_BAD_SIZE;
 944         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 945             (req->Base & (align-1)))
 946                 return CS_BAD_BASE;
 947         if (req->Base)
 948                 align = 0;
 949
 950         /* Allocate system memory window */
 951         for (w = 0; w < MAX_WIN; w++)
 952                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 953         if (w == MAX_WIN)
 954                 return CS_OUT_OF_RESOURCE;
 955
 956         win = &s->win[w];
 957         win->magic = WINDOW_MAGIC;
 958         win->index = w;
 959         win->handle = *handle;
 960         win->sock = s;
 961
 962         if (!(s->features & SS_CAP_STATIC_MAP)) {
 963                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 964                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 965                 if (!win->ctl.res)
 966                         return CS_IN_USE;
 967         }
 968         (*handle)->state |= CLIENT_WIN_REQ(w);
 969
 970         /* Configure the socket controller */
 971         win->ctl.map = w+1;
 972         win->ctl.flags = 0;
 973         win->ctl.speed = req->AccessSpeed;
 974         if (req->Attributes & WIN_MEMORY_TYPE)
 975                 win->ctl.flags |= MAP_ATTRIB;
 976         if (req->Attributes & WIN_ENABLE)
 977                 win->ctl.flags |= MAP_ACTIVE;
 978         if (req->Attributes & WIN_DATA_WIDTH_16)
 979                 win->ctl.flags |= MAP_16BIT;
 980         if (req->Attributes & WIN_USE_WAIT)
 981                 win->ctl.flags |= MAP_USE_WAIT;
 982         win->ctl.card_start = 0;
 983         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 984                 return CS_BAD_ARGS;
 985         s->state |= SOCKET_WIN_REQ(w);
 986
 987         /* Return window handle */
 988         if (s->features & SS_CAP_STATIC_MAP) {
 989                 req->Base = win->ctl.static_start;
 990         } else {
 991                 req->Base = win->ctl.res->start;
 992         }
 993         *wh = win;
 994
 995         return CS_SUCCESS;
 996 } /* pcmcia_request_window */
 997 EXPORT_SYMBOL(pcmcia_request_window);