drivers/pcmcia/pcmcia_resource.c

   1 /*
   2  * PCMCIA 16-bit resource management functions
   3  *
   4  * The initial developer of the original code is David A. Hinds
   5  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
   6  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
   7  *
   8  * Copyright (C) 1999        David A. Hinds
   9  * Copyright (C) 2004-2005   Dominik Brodowski
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/delay.h>
  21 #include <linux/pci.h>
  22 #include <linux/device.h>
  23
  24 #define IN_CARD_SERVICES
  25 #include <pcmcia/cs_types.h>
  26 #include <pcmcia/ss.h>
  27 #include <pcmcia/cs.h>
  28 #include <pcmcia/cistpl.h>
  29 #include <pcmcia/cisreg.h>
  30 #include <pcmcia/ds.h>
  31
  32 #include "cs_internal.h"
  33 #include "ds_internal.h"
  34
  35
  36 /* Access speed for IO windows */
  37 static int io_speed = 0;
  38 module_param(io_speed, int, 0444);
  39
  40
  41 #ifdef CONFIG_PCMCIA_PROBE
  42 #include <asm/irq.h>
  43 /* mask of IRQs already reserved by other cards, we should avoid using them */
  44 static u8 pcmcia_used_irq[NR_IRQS];
  45 #endif
  46
  47
  48 #ifdef DEBUG
  49 extern int ds_pc_debug;
  50
  51 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  52         if (ds_pc_debug >= lvl)                                 \
  53                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  54                         cs_socket_name(skt) , ## arg);          \
  55 } while (0)
  56 #else
  57 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  58 #endif
  59
  60
  61
  62 /** alloc_io_space
  63  *
  64  * Special stuff for managing IO windows, because they are scarce
  65  */
  66
  67 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
  68                           unsigned int *base, unsigned int num, u_int lines)
  69 {
  70         int i;
  71         unsigned int try, align;
  72
  73         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  74         if (align && (align < num)) {
  75                 if (*base) {
  76                         ds_dbg(s, 0, "odd IO request: num %#x align %#x\n",
  77                                num, align);
  78                         align = 0;
  79                 } else
  80                         while (align && (align < num)) align <<= 1;
  81         }
  82         if (*base & ~(align-1)) {
  83                 ds_dbg(s, 0, "odd IO request: base %#x align %#x\n",
  84                        *base, align);
  85                 align = 0;
  86         }
  87         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  88                 *base = s->io_offset | (*base & 0x0fff);
  89                 return 0;
  90         }
  91         /* Check for an already-allocated window that must conflict with
  92          * what was asked for.  It is a hack because it does not catch all
  93          * potential conflicts, just the most obvious ones.
  94          */
  95         for (i = 0; i < MAX_IO_WIN; i++)
  96                 if ((s->io[i].res) && *base &&
  97                     ((s->io[i].res->start & (align-1)) == *base))
  98                         return 1;
  99         for (i = 0; i < MAX_IO_WIN; i++) {
 100                 if (!s->io[i].res) {
 101                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 102                         if (s->io[i].res) {
 103                                 *base = s->io[i].res->start;
 104                                 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
 105                                 s->io[i].InUse = num;
 106                                 break;
 107                         } else
 108                                 return 1;
 109                 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
 110                         continue;
 111                 /* Try to extend top of window */
 112                 try = s->io[i].res->end + 1;
 113                 if ((*base == 0) || (*base == try))
 114                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 115                                                     s->io[i].res->end + num, s) == 0) {
 116                                 *base = try;
 117                                 s->io[i].InUse += num;
 118                                 break;
 119                         }
 120                 /* Try to extend bottom of window */
 121                 try = s->io[i].res->start - num;
 122                 if ((*base == 0) || (*base == try))
 123                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 124                                                     s->io[i].res->end, s) == 0) {
 125                                 *base = try;
 126                                 s->io[i].InUse += num;
 127                                 break;
 128                         }
 129         }
 130         return (i == MAX_IO_WIN);
 131 } /* alloc_io_space */
 132
 133
 134 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
 135                              unsigned int num)
 136 {
 137         int i;
 138
 139         for (i = 0; i < MAX_IO_WIN; i++) {
 140                 if (!s->io[i].res)
 141                         continue;
 142                 if ((s->io[i].res->start <= base) &&
 143                     (s->io[i].res->end >= base+num-1)) {
 144                         s->io[i].InUse -= num;
 145                         /* Free the window if no one else is using it */
 146                         if (s->io[i].InUse == 0) {
 147                                 release_resource(s->io[i].res);
 148                                 kfree(s->io[i].res);
 149                                 s->io[i].res = NULL;
 150                         }
 151                 }
 152         }
 153 } /* release_io_space */
 154
 155
 156 /** pccard_access_configuration_register
 157  *
 158  * Access_configuration_register() reads and writes configuration
 159  * registers in attribute memory.  Memory window 0 is reserved for
 160  * this and the tuple reading services.
 161  */
 162
 163 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
 164                                          conf_reg_t *reg)
 165 {
 166         struct pcmcia_socket *s;
 167         config_t *c;
 168         int addr;
 169         u_char val;
 170
 171         if (!p_dev || !p_dev->function_config)
 172                 return CS_NO_CARD;
 173
 174         s = p_dev->socket;
 175         c = p_dev->function_config;
 176
 177         if (!(c->state & CONFIG_LOCKED))
 178                 return CS_CONFIGURATION_LOCKED;
 179
 180         addr = (c->ConfigBase + reg->Offset) >> 1;
 181
 182         switch (reg->Action) {
 183         case CS_READ:
 184                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 185                 reg->Value = val;
 186                 break;
 187         case CS_WRITE:
 188                 val = reg->Value;
 189                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 190                 break;
 191         default:
 192                 return CS_BAD_ARGS;
 193                 break;
 194         }
 195         return CS_SUCCESS;
 196 } /* pcmcia_access_configuration_register */
 197 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 198
 199
 200 int pccard_get_configuration_info(struct pcmcia_socket *s,
 201                                   struct pcmcia_device *p_dev,
 202                                   config_info_t *config)
 203 {
 204         config_t *c;
 205
 206         if (!(s->state & SOCKET_PRESENT))
 207                 return CS_NO_CARD;
 208
 209
 210 #ifdef CONFIG_CARDBUS
 211         if (s->state & SOCKET_CARDBUS) {
 212                 memset(config, 0, sizeof(config_info_t));
 213                 config->Vcc = s->socket.Vcc;
 214                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 215                 config->Option = s->cb_dev->subordinate->number;
 216                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 217                         config->Attributes = CONF_VALID_CLIENT;
 218                         config->IntType = INT_CARDBUS;
 219                         config->AssignedIRQ = s->irq.AssignedIRQ;
 220                         if (config->AssignedIRQ)
 221                                 config->Attributes |= CONF_ENABLE_IRQ;
 222                         if (s->io[0].res) {
 223                                 config->BasePort1 = s->io[0].res->start;
 224                                 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
 225                         }
 226                 }
 227                 return CS_SUCCESS;
 228         }
 229 #endif
 230
 231         if (p_dev) {
 232                 c = p_dev->function_config;
 233                 config->Function = p_dev->func;
 234         } else {
 235                 c = NULL;
 236                 config->Function = 0;
 237         }
 238
 239         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 240                 config->Attributes = 0;
 241                 config->Vcc = s->socket.Vcc;
 242                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 243                 return CS_SUCCESS;
 244         }
 245
 246         config->Attributes = c->Attributes | CONF_VALID_CLIENT;
 247         config->Vcc = s->socket.Vcc;
 248         config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 249         config->IntType = c->IntType;
 250         config->ConfigBase = c->ConfigBase;
 251         config->Status = c->Status;
 252         config->Pin = c->Pin;
 253         config->Copy = c->Copy;
 254         config->Option = c->Option;
 255         config->ExtStatus = c->ExtStatus;
 256         config->Present = config->CardValues = c->CardValues;
 257         config->IRQAttributes = c->irq.Attributes;
 258         config->AssignedIRQ = s->irq.AssignedIRQ;
 259         config->BasePort1 = c->io.BasePort1;
 260         config->NumPorts1 = c->io.NumPorts1;
 261         config->Attributes1 = c->io.Attributes1;
 262         config->BasePort2 = c->io.BasePort2;
 263         config->NumPorts2 = c->io.NumPorts2;
 264         config->Attributes2 = c->io.Attributes2;
 265         config->IOAddrLines = c->io.IOAddrLines;
 266
 267         return CS_SUCCESS;
 268 } /* pccard_get_configuration_info */
 269
 270 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 271                                   config_info_t *config)
 272 {
 273         return pccard_get_configuration_info(p_dev->socket, p_dev,
 274                                              config);
 275 }
 276 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 277
 278
 279 /** pcmcia_get_window
 280  */
 281 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 282                       int idx, win_req_t *req)
 283 {
 284         window_t *win;
 285         int w;
 286
 287         if (!s || !(s->state & SOCKET_PRESENT))
 288                 return CS_NO_CARD;
 289         for (w = idx; w < MAX_WIN; w++)
 290                 if (s->state & SOCKET_WIN_REQ(w))
 291                         break;
 292         if (w == MAX_WIN)
 293                 return CS_NO_MORE_ITEMS;
 294         win = &s->win[w];
 295         req->Base = win->ctl.res->start;
 296         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 297         req->AccessSpeed = win->ctl.speed;
 298         req->Attributes = 0;
 299         if (win->ctl.flags & MAP_ATTRIB)
 300                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 301         if (win->ctl.flags & MAP_ACTIVE)
 302                 req->Attributes |= WIN_ENABLE;
 303         if (win->ctl.flags & MAP_16BIT)
 304                 req->Attributes |= WIN_DATA_WIDTH_16;
 305         if (win->ctl.flags & MAP_USE_WAIT)
 306                 req->Attributes |= WIN_USE_WAIT;
 307         *handle = win;
 308         return CS_SUCCESS;
 309 } /* pcmcia_get_window */
 310 EXPORT_SYMBOL(pcmcia_get_window);
 311
 312
 313 /** pccard_get_status
 314  *
 315  * Get the current socket state bits.  We don't support the latched
 316  * SocketState yet: I haven't seen any point for it.
 317  */
 318
 319 int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev,
 320                       cs_status_t *status)
 321 {
 322         config_t *c;
 323         int val;
 324
 325         s->ops->get_status(s, &val);
 326         status->CardState = status->SocketState = 0;
 327         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 328         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 329         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 330         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 331         if (s->state & SOCKET_SUSPEND)
 332                 status->CardState |= CS_EVENT_PM_SUSPEND;
 333         if (!(s->state & SOCKET_PRESENT))
 334                 return CS_NO_CARD;
 335
 336         c = (p_dev) ? p_dev->function_config : NULL;
 337
 338         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 339             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 340                 u_char reg;
 341                 if (c->CardValues & PRESENT_PIN_REPLACE) {
 342                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 343                         status->CardState |=
 344                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 345                         status->CardState |=
 346                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 347                         status->CardState |=
 348                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 349                         status->CardState |=
 350                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 351                 } else {
 352                         /* No PRR?  Then assume we're always ready */
 353                         status->CardState |= CS_EVENT_READY_CHANGE;
 354                 }
 355                 if (c->CardValues & PRESENT_EXT_STATUS) {
 356                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 357                         status->CardState |=
 358                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 359                 }
 360                 return CS_SUCCESS;
 361         }
 362         status->CardState |=
 363                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 364         status->CardState |=
 365                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 366         status->CardState |=
 367                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 368         status->CardState |=
 369                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 370         return CS_SUCCESS;
 371 } /* pccard_get_status */
 372
 373 int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status)
 374 {
 375         return pccard_get_status(p_dev->socket, p_dev, status);
 376 }
 377 EXPORT_SYMBOL(pcmcia_get_status);
 378
 379
 380
 381 /** pcmcia_get_mem_page
 382  *
 383  * Change the card address of an already open memory window.
 384  */
 385 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 386 {
 387         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 388                 return CS_BAD_HANDLE;
 389         req->Page = 0;
 390         req->CardOffset = win->ctl.card_start;
 391         return CS_SUCCESS;
 392 } /* pcmcia_get_mem_page */
 393 EXPORT_SYMBOL(pcmcia_get_mem_page);
 394
 395
 396 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 397 {
 398         struct pcmcia_socket *s;
 399         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 400                 return CS_BAD_HANDLE;
 401         if (req->Page != 0)
 402                 return CS_BAD_PAGE;
 403         s = win->sock;
 404         win->ctl.card_start = req->CardOffset;
 405         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 406                 return CS_BAD_OFFSET;
 407         return CS_SUCCESS;
 408 } /* pcmcia_map_mem_page */
 409 EXPORT_SYMBOL(pcmcia_map_mem_page);
 410
 411
 412 /** pcmcia_modify_configuration
 413  *
 414  * Modify a locked socket configuration
 415  */
 416 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 417                                 modconf_t *mod)
 418 {
 419         struct pcmcia_socket *s;
 420         config_t *c;
 421
 422         s = p_dev->socket;
 423         c = p_dev->function_config;
 424
 425         if (!(s->state & SOCKET_PRESENT))
 426                 return CS_NO_CARD;
 427         if (!(c->state & CONFIG_LOCKED))
 428                 return CS_CONFIGURATION_LOCKED;
 429
 430         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 431                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 432                         c->Attributes |= CONF_ENABLE_IRQ;
 433                         s->socket.io_irq = s->irq.AssignedIRQ;
 434                 } else {
 435                         c->Attributes &= ~CONF_ENABLE_IRQ;
 436                         s->socket.io_irq = 0;
 437                 }
 438                 s->ops->set_socket(s, &s->socket);
 439         }
 440
 441         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 442                 return CS_BAD_VCC;
 443
 444         /* We only allow changing Vpp1 and Vpp2 to the same value */
 445         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 446             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 447                 if (mod->Vpp1 != mod->Vpp2)
 448                         return CS_BAD_VPP;
 449                 s->socket.Vpp = mod->Vpp1;
 450                 if (s->ops->set_socket(s, &s->socket))
 451                         return CS_BAD_VPP;
 452         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 453                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 454                 return CS_BAD_VPP;
 455
 456         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 457                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 458                 pccard_io_map io_on;
 459                 int i;
 460
 461                 io_on.speed = io_speed;
 462                 for (i = 0; i < MAX_IO_WIN; i++) {
 463                         if (!s->io[i].res)
 464                                 continue;
 465                         io_off.map = i;
 466                         io_on.map = i;
 467
 468                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 469                         io_on.start = s->io[i].res->start;
 470                         io_on.stop = s->io[i].res->end;
 471
 472                         s->ops->set_io_map(s, &io_off);
 473                         mdelay(40);
 474                         s->ops->set_io_map(s, &io_on);
 475                 }
 476         }
 477
 478         return CS_SUCCESS;
 479 } /* modify_configuration */
 480 EXPORT_SYMBOL(pcmcia_modify_configuration);
 481
 482
 483 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 484 {
 485         pccard_io_map io = { 0, 0, 0, 0, 1 };
 486         struct pcmcia_socket *s = p_dev->socket;
 487         config_t *c = p_dev->function_config;
 488         int i;
 489
 490         if (p_dev->_locked) {
 491                 p_dev->_locked = 0;
 492                 if (--(s->lock_count) == 0) {
 493                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 494                         s->socket.Vpp = 0;
 495                         s->socket.io_irq = 0;
 496                         s->ops->set_socket(s, &s->socket);
 497                 }
 498         }
 499         if (c->state & CONFIG_LOCKED) {
 500                 c->state &= ~CONFIG_LOCKED;
 501                 if (c->state & CONFIG_IO_REQ)
 502                         for (i = 0; i < MAX_IO_WIN; i++) {
 503                                 if (!s->io[i].res)
 504                                         continue;
 505                                 s->io[i].Config--;
 506                                 if (s->io[i].Config != 0)
 507                                         continue;
 508                                 io.map = i;
 509                                 s->ops->set_io_map(s, &io);
 510                         }
 511         }
 512
 513         return CS_SUCCESS;
 514 } /* 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 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 526 {
 527         struct pcmcia_socket *s = p_dev->socket;
 528         config_t *c = p_dev->function_config;
 529
 530         if (!p_dev->_io )
 531                 return CS_BAD_HANDLE;
 532
 533         p_dev->_io = 0;
 534
 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
 541         c->state &= ~CONFIG_IO_REQ;
 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
 550
 551 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 552 {
 553         struct pcmcia_socket *s = p_dev->socket;
 554         config_t *c= p_dev->function_config;
 555
 556         if (!p_dev->_irq)
 557                 return CS_BAD_HANDLE;
 558         p_dev->_irq = 0;
 559
 560         if (c->state & CONFIG_LOCKED)
 561                 return CS_CONFIGURATION_LOCKED;
 562         if (c->irq.Attributes != req->Attributes)
 563                 return CS_BAD_ATTRIBUTE;
 564         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 565                 return CS_BAD_IRQ;
 566         if (--s->irq.Config == 0) {
 567                 c->state &= ~CONFIG_IRQ_REQ;
 568                 s->irq.AssignedIRQ = 0;
 569         }
 570
 571         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 572                 free_irq(req->AssignedIRQ, req->Instance);
 573         }
 574
 575 #ifdef CONFIG_PCMCIA_PROBE
 576         pcmcia_used_irq[req->AssignedIRQ]--;
 577 #endif
 578
 579         return CS_SUCCESS;
 580 } /* pcmcia_release_irq */
 581
 582
 583 int pcmcia_release_window(window_handle_t win)
 584 {
 585         struct pcmcia_socket *s;
 586
 587         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 588                 return CS_BAD_HANDLE;
 589         s = win->sock;
 590         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 591                 return CS_BAD_HANDLE;
 592
 593         /* Shut down memory window */
 594         win->ctl.flags &= ~MAP_ACTIVE;
 595         s->ops->set_mem_map(s, &win->ctl);
 596         s->state &= ~SOCKET_WIN_REQ(win->index);
 597
 598         /* Release system memory */
 599         if (win->ctl.res) {
 600                 release_resource(win->ctl.res);
 601                 kfree(win->ctl.res);
 602                 win->ctl.res = NULL;
 603         }
 604         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 605
 606         win->magic = 0;
 607
 608         return CS_SUCCESS;
 609 } /* pcmcia_release_window */
 610 EXPORT_SYMBOL(pcmcia_release_window);
 611
 612
 613 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 614                                  config_req_t *req)
 615 {
 616         int i;
 617         u_int base;
 618         struct pcmcia_socket *s = p_dev->socket;
 619         config_t *c;
 620         pccard_io_map iomap;
 621
 622         if (!(s->state & SOCKET_PRESENT))
 623                 return CS_NO_CARD;
 624
 625         if (req->IntType & INT_CARDBUS)
 626                 return CS_UNSUPPORTED_MODE;
 627         c = p_dev->function_config;
 628         if (c->state & CONFIG_LOCKED)
 629                 return CS_CONFIGURATION_LOCKED;
 630
 631         /* Do power control.  We don't allow changes in Vcc. */
 632         s->socket.Vpp = req->Vpp;
 633         if (s->ops->set_socket(s, &s->socket))
 634                 return CS_BAD_VPP;
 635
 636         /* Pick memory or I/O card, DMA mode, interrupt */
 637         c->IntType = req->IntType;
 638         c->Attributes = req->Attributes;
 639         if (req->IntType & INT_MEMORY_AND_IO)
 640                 s->socket.flags |= SS_IOCARD;
 641         if (req->IntType & INT_ZOOMED_VIDEO)
 642                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 643         if (req->Attributes & CONF_ENABLE_DMA)
 644                 s->socket.flags |= SS_DMA_MODE;
 645         if (req->Attributes & CONF_ENABLE_SPKR)
 646                 s->socket.flags |= SS_SPKR_ENA;
 647         if (req->Attributes & CONF_ENABLE_IRQ)
 648                 s->socket.io_irq = s->irq.AssignedIRQ;
 649         else
 650                 s->socket.io_irq = 0;
 651         s->ops->set_socket(s, &s->socket);
 652         s->lock_count++;
 653
 654         /* Set up CIS configuration registers */
 655         base = c->ConfigBase = req->ConfigBase;
 656         c->CardValues = req->Present;
 657         if (req->Present & PRESENT_COPY) {
 658                 c->Copy = req->Copy;
 659                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 660         }
 661         if (req->Present & PRESENT_OPTION) {
 662                 if (s->functions == 1) {
 663                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 664                 } else {
 665                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 666                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 667                         if (req->Present & PRESENT_IOBASE_0)
 668                                 c->Option |= COR_ADDR_DECODE;
 669                 }
 670                 if (c->state & CONFIG_IRQ_REQ)
 671                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 672                                 c->Option |= COR_LEVEL_REQ;
 673                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 674                 mdelay(40);
 675         }
 676         if (req->Present & PRESENT_STATUS) {
 677                 c->Status = req->Status;
 678                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 679         }
 680         if (req->Present & PRESENT_PIN_REPLACE) {
 681                 c->Pin = req->Pin;
 682                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 683         }
 684         if (req->Present & PRESENT_EXT_STATUS) {
 685                 c->ExtStatus = req->ExtStatus;
 686                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 687         }
 688         if (req->Present & PRESENT_IOBASE_0) {
 689                 u_char b = c->io.BasePort1 & 0xff;
 690                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 691                 b = (c->io.BasePort1 >> 8) & 0xff;
 692                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 693         }
 694         if (req->Present & PRESENT_IOSIZE) {
 695                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 696                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 697         }
 698
 699         /* Configure I/O windows */
 700         if (c->state & CONFIG_IO_REQ) {
 701                 iomap.speed = io_speed;
 702                 for (i = 0; i < MAX_IO_WIN; i++)
 703                         if (s->io[i].res) {
 704                                 iomap.map = i;
 705                                 iomap.flags = MAP_ACTIVE;
 706                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 707                                 case IO_DATA_PATH_WIDTH_16:
 708                                         iomap.flags |= MAP_16BIT; break;
 709                                 case IO_DATA_PATH_WIDTH_AUTO:
 710                                         iomap.flags |= MAP_AUTOSZ; break;
 711                                 default:
 712                                         break;
 713                                 }
 714                                 iomap.start = s->io[i].res->start;
 715                                 iomap.stop = s->io[i].res->end;
 716                                 s->ops->set_io_map(s, &iomap);
 717                                 s->io[i].Config++;
 718                         }
 719         }
 720
 721         c->state |= CONFIG_LOCKED;
 722         p_dev->_locked = 1;
 723         return CS_SUCCESS;
 724 } /* pcmcia_request_configuration */
 725 EXPORT_SYMBOL(pcmcia_request_configuration);
 726
 727
 728 /** pcmcia_request_io
 729  *
 730  * Request_io() reserves ranges of port addresses for a socket.
 731  * I have not implemented range sharing or alias addressing.
 732  */
 733 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 734 {
 735         struct pcmcia_socket *s = p_dev->socket;
 736         config_t *c;
 737
 738         if (!(s->state & SOCKET_PRESENT))
 739                 return CS_NO_CARD;
 740
 741         if (!req)
 742                 return CS_UNSUPPORTED_MODE;
 743         c = p_dev->function_config;
 744         if (c->state & CONFIG_LOCKED)
 745                 return CS_CONFIGURATION_LOCKED;
 746         if (c->state & CONFIG_IO_REQ)
 747                 return CS_IN_USE;
 748         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 749                 return CS_BAD_ATTRIBUTE;
 750         if ((req->NumPorts2 > 0) &&
 751             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 752                 return CS_BAD_ATTRIBUTE;
 753
 754         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 755                            req->NumPorts1, req->IOAddrLines))
 756                 return CS_IN_USE;
 757
 758         if (req->NumPorts2) {
 759                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 760                                    req->NumPorts2, req->IOAddrLines)) {
 761                         release_io_space(s, req->BasePort1, req->NumPorts1);
 762                         return CS_IN_USE;
 763                 }
 764         }
 765
 766         c->io = *req;
 767         c->state |= CONFIG_IO_REQ;
 768         p_dev->_io = 1;
 769         return CS_SUCCESS;
 770 } /* pcmcia_request_io */
 771 EXPORT_SYMBOL(pcmcia_request_io);
 772
 773
 774 /** pcmcia_request_irq
 775  *
 776  * Request_irq() reserves an irq for this client.
 777  *
 778  * Also, since Linux only reserves irq's when they are actually
 779  * hooked, we don't guarantee that an irq will still be available
 780  * when the configuration is locked.  Now that I think about it,
 781  * there might be a way to fix this using a dummy handler.
 782  */
 783
 784 #ifdef CONFIG_PCMCIA_PROBE
 785 static irqreturn_t test_action(int cpl, void *dev_id)
 786 {
 787         return IRQ_NONE;
 788 }
 789 #endif
 790
 791 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 792 {
 793         struct pcmcia_socket *s = p_dev->socket;
 794         config_t *c;
 795         int ret = CS_IN_USE, irq = 0;
 796         int type;
 797
 798         if (!(s->state & SOCKET_PRESENT))
 799                 return CS_NO_CARD;
 800         c = p_dev->function_config;
 801         if (c->state & CONFIG_LOCKED)
 802                 return CS_CONFIGURATION_LOCKED;
 803         if (c->state & CONFIG_IRQ_REQ)
 804                 return CS_IN_USE;
 805
 806         /* Decide what type of interrupt we are registering */
 807         type = 0;
 808         if (s->functions > 1)           /* All of this ought to be handled higher up */
 809                 type = IRQF_SHARED;
 810         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 811                 type = IRQF_SHARED;
 812
 813 #ifdef CONFIG_PCMCIA_PROBE
 814
 815 #ifdef IRQ_NOAUTOEN
 816         /* if the underlying IRQ infrastructure allows for it, only allocate
 817          * the IRQ, but do not enable it
 818          */
 819         if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 820                 type |= IRQ_NOAUTOEN;
 821 #endif /* IRQ_NOAUTOEN */
 822
 823         if (s->irq.AssignedIRQ != 0) {
 824                 /* If the interrupt is already assigned, it must be the same */
 825                 irq = s->irq.AssignedIRQ;
 826         } else {
 827                 int try;
 828                 u32 mask = s->irq_mask;
 829                 void *data = &p_dev->dev.driver; /* something unique to this device */
 830
 831                 for (try = 0; try < 64; try++) {
 832                         irq = try % 32;
 833
 834                         /* marked as available by driver, and not blocked by userspace? */
 835                         if (!((mask >> irq) & 1))
 836                                 continue;
 837
 838                         /* avoid an IRQ which is already used by a PCMCIA card */
 839                         if ((try < 32) && pcmcia_used_irq[irq])
 840                                 continue;
 841
 842                         /* register the correct driver, if possible, of check whether
 843                          * registering a dummy handle works, i.e. if the IRQ isn't
 844                          * marked as used by the kernel resource management core */
 845                         ret = request_irq(irq,
 846                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 847                                           type,
 848                                           p_dev->devname,
 849                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 850                         if (!ret) {
 851                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 852                                         free_irq(irq, data);
 853                                 break;
 854                         }
 855                 }
 856         }
 857 #endif
 858         /* only assign PCI irq if no IRQ already assigned */
 859         if (ret && !s->irq.AssignedIRQ) {
 860                 if (!s->pci_irq)
 861                         return ret;
 862                 type = IRQF_SHARED;
 863                 irq = s->pci_irq;
 864         }
 865
 866         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 867                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 868                         return CS_IN_USE;
 869         }
 870
 871         /* Make sure the fact the request type was overridden is passed back */
 872         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 873                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 874                 printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
 875                 printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n");
 876         }
 877         c->irq.Attributes = req->Attributes;
 878         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 879         s->irq.Config++;
 880
 881         c->state |= CONFIG_IRQ_REQ;
 882         p_dev->_irq = 1;
 883
 884 #ifdef CONFIG_PCMCIA_PROBE
 885         pcmcia_used_irq[irq]++;
 886 #endif
 887
 888         return CS_SUCCESS;
 889 } /* pcmcia_request_irq */
 890 EXPORT_SYMBOL(pcmcia_request_irq);
 891
 892
 893 /** pcmcia_request_window
 894  *
 895  * Request_window() establishes a mapping between card memory space
 896  * and system memory space.
 897  */
 898 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 899 {
 900         struct pcmcia_socket *s = (*p_dev)->socket;
 901         window_t *win;
 902         u_long align;
 903         int w;
 904
 905         if (!(s->state & SOCKET_PRESENT))
 906                 return CS_NO_CARD;
 907         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 908                 return CS_BAD_ATTRIBUTE;
 909
 910         /* Window size defaults to smallest available */
 911         if (req->Size == 0)
 912                 req->Size = s->map_size;
 913         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 914                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 915                  req->Size : s->map_size);
 916         if (req->Size & (s->map_size-1))
 917                 return CS_BAD_SIZE;
 918         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 919             (req->Base & (align-1)))
 920                 return CS_BAD_BASE;
 921         if (req->Base)
 922                 align = 0;
 923
 924         /* Allocate system memory window */
 925         for (w = 0; w < MAX_WIN; w++)
 926                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 927         if (w == MAX_WIN)
 928                 return CS_OUT_OF_RESOURCE;
 929
 930         win = &s->win[w];
 931         win->magic = WINDOW_MAGIC;
 932         win->index = w;
 933         win->handle = *p_dev;
 934         win->sock = s;
 935
 936         if (!(s->features & SS_CAP_STATIC_MAP)) {
 937                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 938                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 939                 if (!win->ctl.res)
 940                         return CS_IN_USE;
 941         }
 942         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 943
 944         /* Configure the socket controller */
 945         win->ctl.map = w+1;
 946         win->ctl.flags = 0;
 947         win->ctl.speed = req->AccessSpeed;
 948         if (req->Attributes & WIN_MEMORY_TYPE)
 949                 win->ctl.flags |= MAP_ATTRIB;
 950         if (req->Attributes & WIN_ENABLE)
 951                 win->ctl.flags |= MAP_ACTIVE;
 952         if (req->Attributes & WIN_DATA_WIDTH_16)
 953                 win->ctl.flags |= MAP_16BIT;
 954         if (req->Attributes & WIN_USE_WAIT)
 955                 win->ctl.flags |= MAP_USE_WAIT;
 956         win->ctl.card_start = 0;
 957         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 958                 return CS_BAD_ARGS;
 959         s->state |= SOCKET_WIN_REQ(w);
 960
 961         /* Return window handle */
 962         if (s->features & SS_CAP_STATIC_MAP) {
 963                 req->Base = win->ctl.static_start;
 964         } else {
 965                 req->Base = win->ctl.res->start;
 966         }
 967         *wh = win;
 968
 969         return CS_SUCCESS;
 970 } /* pcmcia_request_window */
 971 EXPORT_SYMBOL(pcmcia_request_window);
 972
 973 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 974         pcmcia_release_configuration(p_dev);
 975         pcmcia_release_io(p_dev, &p_dev->io);
 976         pcmcia_release_irq(p_dev, &p_dev->irq);
 977         if (p_dev->win)
 978                 pcmcia_release_window(p_dev->win);
 979 }
 980 EXPORT_SYMBOL(pcmcia_disable_device);