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                 s->io[0].Attributes = attr;
  93                 return 0;
  94         }
  95         /* Check for an already-allocated window that must conflict with
  96          * what was asked for.  It is a hack because it does not catch all
  97          * potential conflicts, just the most obvious ones.
  98          */
  99         for (i = 0; i < MAX_IO_WIN; i++)
 100                 if ((s->io[i].NumPorts != 0) &&
 101                     ((s->io[i].BasePort & (align-1)) == *base))
 102                         return 1;
 103         for (i = 0; i < MAX_IO_WIN; i++) {
 104                 if (s->io[i].NumPorts == 0) {
 105                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 106                         if (s->io[i].res) {
 107                                 s->io[i].Attributes = attr;
 108                                 s->io[i].BasePort = *base = s->io[i].res->start;
 109                                 s->io[i].NumPorts = s->io[i].InUse = num;
 110                                 break;
 111                         } else
 112                                 return 1;
 113                 } else if (s->io[i].Attributes != attr)
 114                         continue;
 115                 /* Try to extend top of window */
 116                 try = s->io[i].BasePort + s->io[i].NumPorts;
 117                 if ((*base == 0) || (*base == try))
 118                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 119                                                     s->io[i].res->end + num, s) == 0) {
 120                                 *base = try;
 121                                 s->io[i].NumPorts += num;
 122                                 s->io[i].InUse += num;
 123                                 break;
 124                         }
 125                 /* Try to extend bottom of window */
 126                 try = s->io[i].BasePort - num;
 127                 if ((*base == 0) || (*base == try))
 128                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 129                                                     s->io[i].res->end, s) == 0) {
 130                                 s->io[i].BasePort = *base = try;
 131                                 s->io[i].NumPorts += num;
 132                                 s->io[i].InUse += num;
 133                                 break;
 134                         }
 135         }
 136         return (i == MAX_IO_WIN);
 137 } /* alloc_io_space */
 138
 139
 140 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
 141                              ioaddr_t num)
 142 {
 143         int i;
 144
 145         for (i = 0; i < MAX_IO_WIN; i++) {
 146                 if ((s->io[i].BasePort <= base) &&
 147                     (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
 148                         s->io[i].InUse -= num;
 149                         /* Free the window if no one else is using it */
 150                         if (s->io[i].InUse == 0) {
 151                                 s->io[i].NumPorts = 0;
 152                                 release_resource(s->io[i].res);
 153                                 kfree(s->io[i].res);
 154                                 s->io[i].res = NULL;
 155                         }
 156                 }
 157         }
 158 } /* release_io_space */
 159
 160
 161 /** pccard_access_configuration_register
 162  *
 163  * Access_configuration_register() reads and writes configuration
 164  * registers in attribute memory.  Memory window 0 is reserved for
 165  * this and the tuple reading services.
 166  */
 167
 168 int pccard_access_configuration_register(struct pcmcia_socket *s,
 169                                          unsigned int function,
 170                                          conf_reg_t *reg)
 171 {
 172         config_t *c;
 173         int addr;
 174         u_char val;
 175
 176         if (!s || !s->config)
 177                 return CS_NO_CARD;
 178
 179         c = &s->config[function];
 180
 181         if (c == NULL)
 182                 return CS_NO_CARD;
 183
 184         if (!(c->state & CONFIG_LOCKED))
 185                 return CS_CONFIGURATION_LOCKED;
 186
 187         addr = (c->ConfigBase + reg->Offset) >> 1;
 188
 189         switch (reg->Action) {
 190         case CS_READ:
 191                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 192                 reg->Value = val;
 193                 break;
 194         case CS_WRITE:
 195                 val = reg->Value;
 196                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 197                 break;
 198         default:
 199                 return CS_BAD_ARGS;
 200                 break;
 201         }
 202         return CS_SUCCESS;
 203 } /* pccard_access_configuration_register */
 204
 205 int pcmcia_access_configuration_register(client_handle_t handle,
 206                                          conf_reg_t *reg)
 207 {
 208         struct pcmcia_socket *s;
 209         if (CHECK_HANDLE(handle))
 210                 return CS_BAD_HANDLE;
 211         s = SOCKET(handle);
 212         return pccard_access_configuration_register(s, handle->Function, reg);
 213 }
 214 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 215
 216
 217
 218 int pccard_get_configuration_info(struct pcmcia_socket *s,
 219                                   unsigned int function,
 220                                   config_info_t *config)
 221 {
 222         config_t *c;
 223
 224         if (!(s->state & SOCKET_PRESENT))
 225                 return CS_NO_CARD;
 226
 227         config->Function = function;
 228
 229 #ifdef CONFIG_CARDBUS
 230         if (s->state & SOCKET_CARDBUS) {
 231                 memset(config, 0, sizeof(config_info_t));
 232                 config->Vcc = s->socket.Vcc;
 233                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 234                 config->Option = s->cb_dev->subordinate->number;
 235                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 236                         config->Attributes = CONF_VALID_CLIENT;
 237                         config->IntType = INT_CARDBUS;
 238                         config->AssignedIRQ = s->irq.AssignedIRQ;
 239                         if (config->AssignedIRQ)
 240                                 config->Attributes |= CONF_ENABLE_IRQ;
 241                         config->BasePort1 = s->io[0].BasePort;
 242                         config->NumPorts1 = s->io[0].NumPorts;
 243                 }
 244                 return CS_SUCCESS;
 245         }
 246 #endif
 247
 248         c = (s->config != NULL) ? &s->config[function] : NULL;
 249
 250         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 251                 config->Attributes = 0;
 252                 config->Vcc = s->socket.Vcc;
 253                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 254                 return CS_SUCCESS;
 255         }
 256
 257         /* !!! This is a hack !!! */
 258         memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
 259         config->Attributes |= CONF_VALID_CLIENT;
 260         config->CardValues = c->CardValues;
 261         config->IRQAttributes = c->irq.Attributes;
 262         config->AssignedIRQ = s->irq.AssignedIRQ;
 263         config->BasePort1 = c->io.BasePort1;
 264         config->NumPorts1 = c->io.NumPorts1;
 265         config->Attributes1 = c->io.Attributes1;
 266         config->BasePort2 = c->io.BasePort2;
 267         config->NumPorts2 = c->io.NumPorts2;
 268         config->Attributes2 = c->io.Attributes2;
 269         config->IOAddrLines = c->io.IOAddrLines;
 270
 271         return CS_SUCCESS;
 272 } /* pccard_get_configuration_info */
 273
 274 int pcmcia_get_configuration_info(client_handle_t handle,
 275                                   config_info_t *config)
 276 {
 277         struct pcmcia_socket *s;
 278
 279         if ((CHECK_HANDLE(handle)) || !config)
 280                 return CS_BAD_HANDLE;
 281         s = SOCKET(handle);
 282         if (!s)
 283                 return CS_BAD_HANDLE;
 284         return pccard_get_configuration_info(s, handle->Function, config);
 285 }
 286 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 287
 288
 289 /** pcmcia_get_window
 290  */
 291 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 292                       int idx, win_req_t *req)
 293 {
 294         window_t *win;
 295         int w;
 296
 297         if (!s || !(s->state & SOCKET_PRESENT))
 298                 return CS_NO_CARD;
 299         for (w = idx; w < MAX_WIN; w++)
 300                 if (s->state & SOCKET_WIN_REQ(w))
 301                         break;
 302         if (w == MAX_WIN)
 303                 return CS_NO_MORE_ITEMS;
 304         win = &s->win[w];
 305         req->Base = win->ctl.res->start;
 306         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 307         req->AccessSpeed = win->ctl.speed;
 308         req->Attributes = 0;
 309         if (win->ctl.flags & MAP_ATTRIB)
 310                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 311         if (win->ctl.flags & MAP_ACTIVE)
 312                 req->Attributes |= WIN_ENABLE;
 313         if (win->ctl.flags & MAP_16BIT)
 314                 req->Attributes |= WIN_DATA_WIDTH_16;
 315         if (win->ctl.flags & MAP_USE_WAIT)
 316                 req->Attributes |= WIN_USE_WAIT;
 317         *handle = win;
 318         return CS_SUCCESS;
 319 } /* pcmcia_get_window */
 320 EXPORT_SYMBOL(pcmcia_get_window);
 321
 322
 323 /** pccard_get_status
 324  *
 325  * Get the current socket state bits.  We don't support the latched
 326  * SocketState yet: I haven't seen any point for it.
 327  */
 328
 329 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
 330                       cs_status_t *status)
 331 {
 332         config_t *c;
 333         int val;
 334
 335         s->ops->get_status(s, &val);
 336         status->CardState = status->SocketState = 0;
 337         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 338         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 339         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 340         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 341         if (s->state & SOCKET_SUSPEND)
 342                 status->CardState |= CS_EVENT_PM_SUSPEND;
 343         if (!(s->state & SOCKET_PRESENT))
 344                 return CS_NO_CARD;
 345
 346         c = (s->config != NULL) ? &s->config[function] : NULL;
 347         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 348             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 349                 u_char reg;
 350                 if (c->Present & PRESENT_PIN_REPLACE) {
 351                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 352                         status->CardState |=
 353                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 354                         status->CardState |=
 355                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 356                         status->CardState |=
 357                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 358                         status->CardState |=
 359                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 360                 } else {
 361                         /* No PRR?  Then assume we're always ready */
 362                         status->CardState |= CS_EVENT_READY_CHANGE;
 363                 }
 364                 if (c->Present & PRESENT_EXT_STATUS) {
 365                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 366                         status->CardState |=
 367                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 368                 }
 369                 return CS_SUCCESS;
 370         }
 371         status->CardState |=
 372                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 373         status->CardState |=
 374                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 375         status->CardState |=
 376                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 377         status->CardState |=
 378                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 379         return CS_SUCCESS;
 380 } /* pccard_get_status */
 381
 382 int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
 383 {
 384         struct pcmcia_socket *s;
 385         if (CHECK_HANDLE(handle))
 386                 return CS_BAD_HANDLE;
 387         s = SOCKET(handle);
 388         return pccard_get_status(s, handle->Function, status);
 389 }
 390 EXPORT_SYMBOL(pcmcia_get_status);
 391
 392
 393
 394 /** pcmcia_get_mem_page
 395  *
 396  * Change the card address of an already open memory window.
 397  */
 398 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 399 {
 400         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 401                 return CS_BAD_HANDLE;
 402         req->Page = 0;
 403         req->CardOffset = win->ctl.card_start;
 404         return CS_SUCCESS;
 405 } /* pcmcia_get_mem_page */
 406 EXPORT_SYMBOL(pcmcia_get_mem_page);
 407
 408
 409 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 410 {
 411         struct pcmcia_socket *s;
 412         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 413                 return CS_BAD_HANDLE;
 414         if (req->Page != 0)
 415                 return CS_BAD_PAGE;
 416         s = win->sock;
 417         win->ctl.card_start = req->CardOffset;
 418         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 419                 return CS_BAD_OFFSET;
 420         return CS_SUCCESS;
 421 } /* pcmcia_map_mem_page */
 422 EXPORT_SYMBOL(pcmcia_map_mem_page);
 423
 424
 425 /** pcmcia_modify_configuration
 426  *
 427  * Modify a locked socket configuration
 428  */
 429 int pcmcia_modify_configuration(client_handle_t handle,
 430                                 modconf_t *mod)
 431 {
 432         struct pcmcia_socket *s;
 433         config_t *c;
 434
 435         if (CHECK_HANDLE(handle))
 436                 return CS_BAD_HANDLE;
 437         s = SOCKET(handle);
 438         c = CONFIG(handle);
 439         if (!(s->state & SOCKET_PRESENT))
 440                 return CS_NO_CARD;
 441         if (!(c->state & CONFIG_LOCKED))
 442                 return CS_CONFIGURATION_LOCKED;
 443
 444         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 445                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 446                         c->Attributes |= CONF_ENABLE_IRQ;
 447                         s->socket.io_irq = s->irq.AssignedIRQ;
 448                 } else {
 449                         c->Attributes &= ~CONF_ENABLE_IRQ;
 450                         s->socket.io_irq = 0;
 451                 }
 452                 s->ops->set_socket(s, &s->socket);
 453         }
 454
 455         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 456                 return CS_BAD_VCC;
 457
 458         /* We only allow changing Vpp1 and Vpp2 to the same value */
 459         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 460             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 461                 if (mod->Vpp1 != mod->Vpp2)
 462                         return CS_BAD_VPP;
 463                 c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
 464                 if (s->ops->set_socket(s, &s->socket))
 465                         return CS_BAD_VPP;
 466         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 467                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 468                 return CS_BAD_VPP;
 469
 470         return CS_SUCCESS;
 471 } /* modify_configuration */
 472 EXPORT_SYMBOL(pcmcia_modify_configuration);
 473
 474
 475 int pcmcia_release_configuration(client_handle_t handle)
 476 {
 477         pccard_io_map io = { 0, 0, 0, 0, 1 };
 478         struct pcmcia_socket *s;
 479         int i;
 480
 481         if (CHECK_HANDLE(handle) ||
 482             !(handle->state & CLIENT_CONFIG_LOCKED))
 483                 return CS_BAD_HANDLE;
 484         handle->state &= ~CLIENT_CONFIG_LOCKED;
 485         s = SOCKET(handle);
 486
 487 #ifdef CONFIG_CARDBUS
 488         if (handle->state & CLIENT_CARDBUS)
 489                 return CS_SUCCESS;
 490 #endif
 491
 492         if (!(handle->state & CLIENT_STALE)) {
 493                 config_t *c = CONFIG(handle);
 494                 if (--(s->lock_count) == 0) {
 495                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 496                         s->socket.Vpp = 0;
 497                         s->socket.io_irq = 0;
 498                         s->ops->set_socket(s, &s->socket);
 499                 }
 500                 if (c->state & CONFIG_IO_REQ)
 501                         for (i = 0; i < MAX_IO_WIN; i++) {
 502                                 if (s->io[i].NumPorts == 0)
 503                                         continue;
 504                                 s->io[i].Config--;
 505                                 if (s->io[i].Config != 0)
 506                                         continue;
 507                                 io.map = i;
 508                                 s->ops->set_io_map(s, &io);
 509                         }
 510                 c->state &= ~CONFIG_LOCKED;
 511         }
 512
 513         return CS_SUCCESS;
 514 } /* pcmcia_release_configuration */
 515 EXPORT_SYMBOL(pcmcia_release_configuration);
 516
 517
 518 /** pcmcia_release_io
 519  *
 520  * Release_io() releases the I/O ranges allocated by a client.  This
 521  * may be invoked some time after a card ejection has already dumped
 522  * the actual socket configuration, so if the client is "stale", we
 523  * don't bother checking the port ranges against the current socket
 524  * values.
 525  */
 526 int pcmcia_release_io(client_handle_t handle, io_req_t *req)
 527 {
 528         struct pcmcia_socket *s;
 529
 530         if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IO_REQ))
 531                 return CS_BAD_HANDLE;
 532         handle->state &= ~CLIENT_IO_REQ;
 533         s = SOCKET(handle);
 534
 535 #ifdef CONFIG_CARDBUS
 536         if (handle->state & CLIENT_CARDBUS)
 537                 return CS_SUCCESS;
 538 #endif
 539
 540         if (!(handle->state & CLIENT_STALE)) {
 541                 config_t *c = CONFIG(handle);
 542                 if (c->state & CONFIG_LOCKED)
 543                         return CS_CONFIGURATION_LOCKED;
 544                 if ((c->io.BasePort1 != req->BasePort1) ||
 545                     (c->io.NumPorts1 != req->NumPorts1) ||
 546                     (c->io.BasePort2 != req->BasePort2) ||
 547                     (c->io.NumPorts2 != req->NumPorts2))
 548                         return CS_BAD_ARGS;
 549                 c->state &= ~CONFIG_IO_REQ;
 550         }
 551
 552         release_io_space(s, req->BasePort1, req->NumPorts1);
 553         if (req->NumPorts2)
 554                 release_io_space(s, req->BasePort2, req->NumPorts2);
 555
 556         return CS_SUCCESS;
 557 } /* pcmcia_release_io */
 558 EXPORT_SYMBOL(pcmcia_release_io);
 559
 560
 561 int pcmcia_release_irq(client_handle_t handle, irq_req_t *req)
 562 {
 563         struct pcmcia_socket *s;
 564         if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IRQ_REQ))
 565                 return CS_BAD_HANDLE;
 566         handle->state &= ~CLIENT_IRQ_REQ;
 567         s = SOCKET(handle);
 568
 569         if (!(handle->state & CLIENT_STALE)) {
 570                 config_t *c = CONFIG(handle);
 571                 if (c->state & CONFIG_LOCKED)
 572                         return CS_CONFIGURATION_LOCKED;
 573                 if (c->irq.Attributes != req->Attributes)
 574                         return CS_BAD_ATTRIBUTE;
 575                 if (s->irq.AssignedIRQ != req->AssignedIRQ)
 576                         return CS_BAD_IRQ;
 577                 if (--s->irq.Config == 0) {
 578                         c->state &= ~CONFIG_IRQ_REQ;
 579                         s->irq.AssignedIRQ = 0;
 580                 }
 581         }
 582
 583         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 584                 free_irq(req->AssignedIRQ, req->Instance);
 585         }
 586
 587 #ifdef CONFIG_PCMCIA_PROBE
 588         pcmcia_used_irq[req->AssignedIRQ]--;
 589 #endif
 590
 591         return CS_SUCCESS;
 592 } /* pcmcia_release_irq */
 593 EXPORT_SYMBOL(pcmcia_release_irq);
 594
 595
 596 int pcmcia_release_window(window_handle_t win)
 597 {
 598         struct pcmcia_socket *s;
 599
 600         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 601                 return CS_BAD_HANDLE;
 602         s = win->sock;
 603         if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
 604                 return CS_BAD_HANDLE;
 605
 606         /* Shut down memory window */
 607         win->ctl.flags &= ~MAP_ACTIVE;
 608         s->ops->set_mem_map(s, &win->ctl);
 609         s->state &= ~SOCKET_WIN_REQ(win->index);
 610
 611         /* Release system memory */
 612         if (win->ctl.res) {
 613                 release_resource(win->ctl.res);
 614                 kfree(win->ctl.res);
 615                 win->ctl.res = NULL;
 616         }
 617         win->handle->state &= ~CLIENT_WIN_REQ(win->index);
 618
 619         win->magic = 0;
 620
 621         return CS_SUCCESS;
 622 } /* pcmcia_release_window */
 623 EXPORT_SYMBOL(pcmcia_release_window);
 624
 625
 626 int pcmcia_request_configuration(client_handle_t handle,
 627                                  config_req_t *req)
 628 {
 629         int i;
 630         u_int base;
 631         struct pcmcia_socket *s;
 632         config_t *c;
 633         pccard_io_map iomap;
 634
 635         if (CHECK_HANDLE(handle))
 636                 return CS_BAD_HANDLE;
 637         s = SOCKET(handle);
 638         if (!(s->state & SOCKET_PRESENT))
 639                 return CS_NO_CARD;
 640
 641 #ifdef CONFIG_CARDBUS
 642         if (handle->state & CLIENT_CARDBUS)
 643                 return CS_UNSUPPORTED_MODE;
 644 #endif
 645
 646         if (req->IntType & INT_CARDBUS)
 647                 return CS_UNSUPPORTED_MODE;
 648         c = CONFIG(handle);
 649         if (c->state & CONFIG_LOCKED)
 650                 return CS_CONFIGURATION_LOCKED;
 651
 652         /* Do power control.  We don't allow changes in Vcc. */
 653         if (s->socket.Vcc != req->Vcc)
 654                 return CS_BAD_VCC;
 655         if (req->Vpp1 != req->Vpp2)
 656                 return CS_BAD_VPP;
 657         s->socket.Vpp = req->Vpp1;
 658         if (s->ops->set_socket(s, &s->socket))
 659                 return CS_BAD_VPP;
 660
 661         c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
 662
 663         /* Pick memory or I/O card, DMA mode, interrupt */
 664         c->IntType = req->IntType;
 665         c->Attributes = req->Attributes;
 666         if (req->IntType & INT_MEMORY_AND_IO)
 667                 s->socket.flags |= SS_IOCARD;
 668         if (req->IntType & INT_ZOOMED_VIDEO)
 669                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 670         if (req->Attributes & CONF_ENABLE_DMA)
 671                 s->socket.flags |= SS_DMA_MODE;
 672         if (req->Attributes & CONF_ENABLE_SPKR)
 673                 s->socket.flags |= SS_SPKR_ENA;
 674         if (req->Attributes & CONF_ENABLE_IRQ)
 675                 s->socket.io_irq = s->irq.AssignedIRQ;
 676         else
 677                 s->socket.io_irq = 0;
 678         s->ops->set_socket(s, &s->socket);
 679         s->lock_count++;
 680
 681         /* Set up CIS configuration registers */
 682         base = c->ConfigBase = req->ConfigBase;
 683         c->Present = c->CardValues = req->Present;
 684         if (req->Present & PRESENT_COPY) {
 685                 c->Copy = req->Copy;
 686                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 687         }
 688         if (req->Present & PRESENT_OPTION) {
 689                 if (s->functions == 1) {
 690                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 691                 } else {
 692                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 693                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 694                         if (req->Present & PRESENT_IOBASE_0)
 695                                 c->Option |= COR_ADDR_DECODE;
 696                 }
 697                 if (c->state & CONFIG_IRQ_REQ)
 698                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 699                                 c->Option |= COR_LEVEL_REQ;
 700                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 701                 mdelay(40);
 702         }
 703         if (req->Present & PRESENT_STATUS) {
 704                 c->Status = req->Status;
 705                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 706         }
 707         if (req->Present & PRESENT_PIN_REPLACE) {
 708                 c->Pin = req->Pin;
 709                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 710         }
 711         if (req->Present & PRESENT_EXT_STATUS) {
 712                 c->ExtStatus = req->ExtStatus;
 713                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 714         }
 715         if (req->Present & PRESENT_IOBASE_0) {
 716                 u_char b = c->io.BasePort1 & 0xff;
 717                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 718                 b = (c->io.BasePort1 >> 8) & 0xff;
 719                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 720         }
 721         if (req->Present & PRESENT_IOSIZE) {
 722                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 723                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 724         }
 725
 726         /* Configure I/O windows */
 727         if (c->state & CONFIG_IO_REQ) {
 728                 iomap.speed = io_speed;
 729                 for (i = 0; i < MAX_IO_WIN; i++)
 730                         if (s->io[i].NumPorts != 0) {
 731                                 iomap.map = i;
 732                                 iomap.flags = MAP_ACTIVE;
 733                                 switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
 734                                 case IO_DATA_PATH_WIDTH_16:
 735                                         iomap.flags |= MAP_16BIT; break;
 736                                 case IO_DATA_PATH_WIDTH_AUTO:
 737                                         iomap.flags |= MAP_AUTOSZ; break;
 738                                 default:
 739                                         break;
 740                                 }
 741                                 iomap.start = s->io[i].BasePort;
 742                                 iomap.stop = iomap.start + s->io[i].NumPorts - 1;
 743                                 s->ops->set_io_map(s, &iomap);
 744                                 s->io[i].Config++;
 745                         }
 746         }
 747
 748         c->state |= CONFIG_LOCKED;
 749         handle->state |= CLIENT_CONFIG_LOCKED;
 750         return CS_SUCCESS;
 751 } /* pcmcia_request_configuration */
 752 EXPORT_SYMBOL(pcmcia_request_configuration);
 753
 754
 755 /** pcmcia_request_io
 756  *
 757  * Request_io() reserves ranges of port addresses for a socket.
 758  * I have not implemented range sharing or alias addressing.
 759  */
 760 int pcmcia_request_io(client_handle_t handle, io_req_t *req)
 761 {
 762         struct pcmcia_socket *s;
 763         config_t *c;
 764
 765         if (CHECK_HANDLE(handle))
 766                 return CS_BAD_HANDLE;
 767         s = SOCKET(handle);
 768         if (!(s->state & SOCKET_PRESENT))
 769                 return CS_NO_CARD;
 770
 771         if (handle->state & CLIENT_CARDBUS) {
 772 #ifdef CONFIG_CARDBUS
 773                 handle->state |= CLIENT_IO_REQ;
 774                 return CS_SUCCESS;
 775 #else
 776                 return CS_UNSUPPORTED_FUNCTION;
 777 #endif
 778         }
 779
 780         if (!req)
 781                 return CS_UNSUPPORTED_MODE;
 782         c = CONFIG(handle);
 783         if (c->state & CONFIG_LOCKED)
 784                 return CS_CONFIGURATION_LOCKED;
 785         if (c->state & CONFIG_IO_REQ)
 786                 return CS_IN_USE;
 787         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 788                 return CS_BAD_ATTRIBUTE;
 789         if ((req->NumPorts2 > 0) &&
 790             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 791                 return CS_BAD_ATTRIBUTE;
 792
 793         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 794                            req->NumPorts1, req->IOAddrLines))
 795                 return CS_IN_USE;
 796
 797         if (req->NumPorts2) {
 798                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 799                                    req->NumPorts2, req->IOAddrLines)) {
 800                         release_io_space(s, req->BasePort1, req->NumPorts1);
 801                         return CS_IN_USE;
 802                 }
 803         }
 804
 805         c->io = *req;
 806         c->state |= CONFIG_IO_REQ;
 807         handle->state |= CLIENT_IO_REQ;
 808         return CS_SUCCESS;
 809 } /* pcmcia_request_io */
 810 EXPORT_SYMBOL(pcmcia_request_io);
 811
 812
 813 /** pcmcia_request_irq
 814  *
 815  * Request_irq() reserves an irq for this client.
 816  *
 817  * Also, since Linux only reserves irq's when they are actually
 818  * hooked, we don't guarantee that an irq will still be available
 819  * when the configuration is locked.  Now that I think about it,
 820  * there might be a way to fix this using a dummy handler.
 821  */
 822
 823 #ifdef CONFIG_PCMCIA_PROBE
 824 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
 825 {
 826         return IRQ_NONE;
 827 }
 828 #endif
 829
 830 int pcmcia_request_irq(client_handle_t handle, irq_req_t *req)
 831 {
 832         struct pcmcia_socket *s;
 833         config_t *c;
 834         int ret = CS_IN_USE, irq = 0;
 835         struct pcmcia_device *p_dev = handle_to_pdev(handle);
 836
 837         if (CHECK_HANDLE(handle))
 838                 return CS_BAD_HANDLE;
 839         s = SOCKET(handle);
 840         if (!(s->state & SOCKET_PRESENT))
 841                 return CS_NO_CARD;
 842         c = CONFIG(handle);
 843         if (c->state & CONFIG_LOCKED)
 844                 return CS_CONFIGURATION_LOCKED;
 845         if (c->state & CONFIG_IRQ_REQ)
 846                 return CS_IN_USE;
 847
 848 #ifdef CONFIG_PCMCIA_PROBE
 849         if (s->irq.AssignedIRQ != 0) {
 850                 /* If the interrupt is already assigned, it must be the same */
 851                 irq = s->irq.AssignedIRQ;
 852         } else {
 853                 int try;
 854                 u32 mask = s->irq_mask;
 855                 void *data = NULL;
 856
 857                 for (try = 0; try < 64; try++) {
 858                         irq = try % 32;
 859
 860                         /* marked as available by driver, and not blocked by userspace? */
 861                         if (!((mask >> irq) & 1))
 862                                 continue;
 863
 864                         /* avoid an IRQ which is already used by a PCMCIA card */
 865                         if ((try < 32) && pcmcia_used_irq[irq])
 866                                 continue;
 867
 868                         /* register the correct driver, if possible, of check whether
 869                          * registering a dummy handle works, i.e. if the IRQ isn't
 870                          * marked as used by the kernel resource management core */
 871                         ret = request_irq(irq,
 872                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 873                                           ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 874                                            (s->functions > 1) ||
 875                                            (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 876                                           p_dev->dev.bus_id,
 877                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 878                         if (!ret) {
 879                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 880                                         free_irq(irq, data);
 881                                 break;
 882                         }
 883                 }
 884         }
 885 #endif
 886         if (ret) {
 887                 if (!s->pci_irq)
 888                         return ret;
 889                 irq = s->pci_irq;
 890         }
 891
 892         if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
 893                 if (request_irq(irq, req->Handler,
 894                                 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 895                                  (s->functions > 1) ||
 896                                  (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 897                                 p_dev->dev.bus_id, req->Instance))
 898                         return CS_IN_USE;
 899         }
 900
 901         c->irq.Attributes = req->Attributes;
 902         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 903         s->irq.Config++;
 904
 905         c->state |= CONFIG_IRQ_REQ;
 906         handle->state |= CLIENT_IRQ_REQ;
 907
 908 #ifdef CONFIG_PCMCIA_PROBE
 909         pcmcia_used_irq[irq]++;
 910 #endif
 911
 912         return CS_SUCCESS;
 913 } /* pcmcia_request_irq */
 914 EXPORT_SYMBOL(pcmcia_request_irq);
 915
 916
 917 /** pcmcia_request_window
 918  *
 919  * Request_window() establishes a mapping between card memory space
 920  * and system memory space.
 921  */
 922 int pcmcia_request_window(client_handle_t *handle, win_req_t *req, window_handle_t *wh)
 923 {
 924         struct pcmcia_socket *s;
 925         window_t *win;
 926         u_long align;
 927         int w;
 928
 929         if (CHECK_HANDLE(*handle))
 930                 return CS_BAD_HANDLE;
 931         s = (*handle)->Socket;
 932         if (!(s->state & SOCKET_PRESENT))
 933                 return CS_NO_CARD;
 934         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 935                 return CS_BAD_ATTRIBUTE;
 936
 937         /* Window size defaults to smallest available */
 938         if (req->Size == 0)
 939                 req->Size = s->map_size;
 940         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 941                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 942                  req->Size : s->map_size);
 943         if (req->Size & (s->map_size-1))
 944                 return CS_BAD_SIZE;
 945         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 946             (req->Base & (align-1)))
 947                 return CS_BAD_BASE;
 948         if (req->Base)
 949                 align = 0;
 950
 951         /* Allocate system memory window */
 952         for (w = 0; w < MAX_WIN; w++)
 953                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 954         if (w == MAX_WIN)
 955                 return CS_OUT_OF_RESOURCE;
 956
 957         win = &s->win[w];
 958         win->magic = WINDOW_MAGIC;
 959         win->index = w;
 960         win->handle = *handle;
 961         win->sock = s;
 962
 963         if (!(s->features & SS_CAP_STATIC_MAP)) {
 964                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 965                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 966                 if (!win->ctl.res)
 967                         return CS_IN_USE;
 968         }
 969         (*handle)->state |= CLIENT_WIN_REQ(w);
 970
 971         /* Configure the socket controller */
 972         win->ctl.map = w+1;
 973         win->ctl.flags = 0;
 974         win->ctl.speed = req->AccessSpeed;
 975         if (req->Attributes & WIN_MEMORY_TYPE)
 976                 win->ctl.flags |= MAP_ATTRIB;
 977         if (req->Attributes & WIN_ENABLE)
 978                 win->ctl.flags |= MAP_ACTIVE;
 979         if (req->Attributes & WIN_DATA_WIDTH_16)
 980                 win->ctl.flags |= MAP_16BIT;
 981         if (req->Attributes & WIN_USE_WAIT)
 982                 win->ctl.flags |= MAP_USE_WAIT;
 983         win->ctl.card_start = 0;
 984         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 985                 return CS_BAD_ARGS;
 986         s->state |= SOCKET_WIN_REQ(w);
 987
 988         /* Return window handle */
 989         if (s->features & SS_CAP_STATIC_MAP) {
 990                 req->Base = win->ctl.static_start;
 991         } else {
 992                 req->Base = win->ctl.res->start;
 993         }
 994         *wh = win;
 995
 996         return CS_SUCCESS;
 997 } /* pcmcia_request_window */
 998 EXPORT_SYMBOL(pcmcia_request_window);