SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/pcmcia/pcmcia_resource.c

   1 /*
   2  * PCMCIA 16-bit resource management functions
   3  *
   4  * The initial developer of the original code is David A. Hinds
   5  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
   6  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
   7  *
   8  * Copyright (C) 1999        David A. Hinds
   9  * Copyright (C) 2004-2005   Dominik Brodowski
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  */
  16
  17 #include <linux/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 #include <pcmcia/cs_types.h>
  25 #include <pcmcia/ss.h>
  26 #include <pcmcia/cs.h>
  27 #include <pcmcia/cistpl.h>
  28 #include <pcmcia/cisreg.h>
  29 #include <pcmcia/ds.h>
  30
  31 #include "cs_internal.h"
  32 #include "ds_internal.h"
  33
  34
  35 /* Access speed for IO windows */
  36 static int io_speed = 0;
  37 module_param(io_speed, int, 0444);
  38
  39
  40 #ifdef CONFIG_PCMCIA_PROBE
  41 #include <asm/irq.h>
  42 /* mask of IRQs already reserved by other cards, we should avoid using them */
  43 static u8 pcmcia_used_irq[NR_IRQS];
  44 #endif
  45
  46
  47 #ifdef CONFIG_PCMCIA_DEBUG
  48 extern int ds_pc_debug;
  49
  50 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  51         if (ds_pc_debug >= lvl)                                 \
  52                 dev_printk(KERN_DEBUG, &skt->dev,               \
  53                            "pcmcia_resource: " fmt,             \
  54                            ## arg);                             \
  55 } while (0)
  56 #else
  57 #define ds_dbg(skt, 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 -EINVAL;
 173
 174         s = p_dev->socket;
 175         c = p_dev->function_config;
 176
 177         if (!(c->state & CONFIG_LOCKED))
 178                 return -EACCES;
 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 0;
 196 } /* pcmcia_access_configuration_register */
 197 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 198
 199
 200 /** pcmcia_get_window
 201  */
 202 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 203                       int idx, win_req_t *req)
 204 {
 205         window_t *win;
 206         int w;
 207
 208         if (!s || !(s->state & SOCKET_PRESENT))
 209                 return -ENODEV;
 210         for (w = idx; w < MAX_WIN; w++)
 211                 if (s->state & SOCKET_WIN_REQ(w))
 212                         break;
 213         if (w == MAX_WIN)
 214                 return CS_NO_MORE_ITEMS;
 215         win = &s->win[w];
 216         req->Base = win->ctl.res->start;
 217         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 218         req->AccessSpeed = win->ctl.speed;
 219         req->Attributes = 0;
 220         if (win->ctl.flags & MAP_ATTRIB)
 221                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 222         if (win->ctl.flags & MAP_ACTIVE)
 223                 req->Attributes |= WIN_ENABLE;
 224         if (win->ctl.flags & MAP_16BIT)
 225                 req->Attributes |= WIN_DATA_WIDTH_16;
 226         if (win->ctl.flags & MAP_USE_WAIT)
 227                 req->Attributes |= WIN_USE_WAIT;
 228         *handle = win;
 229         return 0;
 230 } /* pcmcia_get_window */
 231 EXPORT_SYMBOL(pcmcia_get_window);
 232
 233
 234 /** pcmcia_get_mem_page
 235  *
 236  * Change the card address of an already open memory window.
 237  */
 238 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 239 {
 240         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 241                 return -EINVAL;
 242         req->Page = 0;
 243         req->CardOffset = win->ctl.card_start;
 244         return 0;
 245 } /* pcmcia_get_mem_page */
 246 EXPORT_SYMBOL(pcmcia_get_mem_page);
 247
 248
 249 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 250 {
 251         struct pcmcia_socket *s;
 252         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 253                 return -EINVAL;
 254         if (req->Page != 0)
 255                 return CS_BAD_PAGE;
 256         s = win->sock;
 257         win->ctl.card_start = req->CardOffset;
 258         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 259                 return CS_BAD_OFFSET;
 260         return 0;
 261 } /* pcmcia_map_mem_page */
 262 EXPORT_SYMBOL(pcmcia_map_mem_page);
 263
 264
 265 /** pcmcia_modify_configuration
 266  *
 267  * Modify a locked socket configuration
 268  */
 269 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 270                                 modconf_t *mod)
 271 {
 272         struct pcmcia_socket *s;
 273         config_t *c;
 274
 275         s = p_dev->socket;
 276         c = p_dev->function_config;
 277
 278         if (!(s->state & SOCKET_PRESENT))
 279                 return -ENODEV;
 280         if (!(c->state & CONFIG_LOCKED))
 281                 return -EACCES;
 282
 283         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 284                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 285                         c->Attributes |= CONF_ENABLE_IRQ;
 286                         s->socket.io_irq = s->irq.AssignedIRQ;
 287                 } else {
 288                         c->Attributes &= ~CONF_ENABLE_IRQ;
 289                         s->socket.io_irq = 0;
 290                 }
 291                 s->ops->set_socket(s, &s->socket);
 292         }
 293
 294         if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
 295                 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n");
 296                 return -EINVAL;
 297         }
 298
 299         /* We only allow changing Vpp1 and Vpp2 to the same value */
 300         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 301             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 302                 if (mod->Vpp1 != mod->Vpp2)
 303                         ds_dbg(s, 0, "Vpp1 and Vpp2 must be the same\n");
 304                         return -EINVAL;
 305                 s->socket.Vpp = mod->Vpp1;
 306                 if (s->ops->set_socket(s, &s->socket)) {
 307                         dev_printk(KERN_WARNING, &s->dev,
 308                                    "Unable to set VPP\n");
 309                         return -EIO;
 310                 }
 311         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 312                    (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 313                 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n");
 314                 return -EINVAL;
 315         }
 316
 317         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 318                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 319                 pccard_io_map io_on;
 320                 int i;
 321
 322                 io_on.speed = io_speed;
 323                 for (i = 0; i < MAX_IO_WIN; i++) {
 324                         if (!s->io[i].res)
 325                                 continue;
 326                         io_off.map = i;
 327                         io_on.map = i;
 328
 329                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 330                         io_on.start = s->io[i].res->start;
 331                         io_on.stop = s->io[i].res->end;
 332
 333                         s->ops->set_io_map(s, &io_off);
 334                         mdelay(40);
 335                         s->ops->set_io_map(s, &io_on);
 336                 }
 337         }
 338
 339         return 0;
 340 } /* modify_configuration */
 341 EXPORT_SYMBOL(pcmcia_modify_configuration);
 342
 343
 344 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 345 {
 346         pccard_io_map io = { 0, 0, 0, 0, 1 };
 347         struct pcmcia_socket *s = p_dev->socket;
 348         config_t *c = p_dev->function_config;
 349         int i;
 350
 351         if (p_dev->_locked) {
 352                 p_dev->_locked = 0;
 353                 if (--(s->lock_count) == 0) {
 354                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 355                         s->socket.Vpp = 0;
 356                         s->socket.io_irq = 0;
 357                         s->ops->set_socket(s, &s->socket);
 358                 }
 359         }
 360         if (c->state & CONFIG_LOCKED) {
 361                 c->state &= ~CONFIG_LOCKED;
 362                 if (c->state & CONFIG_IO_REQ)
 363                         for (i = 0; i < MAX_IO_WIN; i++) {
 364                                 if (!s->io[i].res)
 365                                         continue;
 366                                 s->io[i].Config--;
 367                                 if (s->io[i].Config != 0)
 368                                         continue;
 369                                 io.map = i;
 370                                 s->ops->set_io_map(s, &io);
 371                         }
 372         }
 373
 374         return 0;
 375 } /* pcmcia_release_configuration */
 376
 377
 378 /** pcmcia_release_io
 379  *
 380  * Release_io() releases the I/O ranges allocated by a client.  This
 381  * may be invoked some time after a card ejection has already dumped
 382  * the actual socket configuration, so if the client is "stale", we
 383  * don't bother checking the port ranges against the current socket
 384  * values.
 385  */
 386 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 387 {
 388         struct pcmcia_socket *s = p_dev->socket;
 389         config_t *c = p_dev->function_config;
 390
 391         if (!p_dev->_io )
 392                 return -EINVAL;
 393
 394         p_dev->_io = 0;
 395
 396         if ((c->io.BasePort1 != req->BasePort1) ||
 397             (c->io.NumPorts1 != req->NumPorts1) ||
 398             (c->io.BasePort2 != req->BasePort2) ||
 399             (c->io.NumPorts2 != req->NumPorts2))
 400                 return CS_BAD_ARGS;
 401
 402         c->state &= ~CONFIG_IO_REQ;
 403
 404         release_io_space(s, req->BasePort1, req->NumPorts1);
 405         if (req->NumPorts2)
 406                 release_io_space(s, req->BasePort2, req->NumPorts2);
 407
 408         return 0;
 409 } /* pcmcia_release_io */
 410
 411
 412 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 413 {
 414         struct pcmcia_socket *s = p_dev->socket;
 415         config_t *c= p_dev->function_config;
 416
 417         if (!p_dev->_irq)
 418                 return -EINVAL;
 419         p_dev->_irq = 0;
 420
 421         if (c->state & CONFIG_LOCKED)
 422                 return -EACCES;
 423         if (c->irq.Attributes != req->Attributes)
 424                 return CS_BAD_ATTRIBUTE;
 425         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 426                 return CS_BAD_IRQ;
 427         if (--s->irq.Config == 0) {
 428                 c->state &= ~CONFIG_IRQ_REQ;
 429                 s->irq.AssignedIRQ = 0;
 430         }
 431
 432         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 433                 free_irq(req->AssignedIRQ, req->Instance);
 434         }
 435
 436 #ifdef CONFIG_PCMCIA_PROBE
 437         pcmcia_used_irq[req->AssignedIRQ]--;
 438 #endif
 439
 440         return 0;
 441 } /* pcmcia_release_irq */
 442
 443
 444 int pcmcia_release_window(window_handle_t win)
 445 {
 446         struct pcmcia_socket *s;
 447
 448         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 449                 return -EINVAL;
 450         s = win->sock;
 451         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 452                 return -EINVAL;
 453
 454         /* Shut down memory window */
 455         win->ctl.flags &= ~MAP_ACTIVE;
 456         s->ops->set_mem_map(s, &win->ctl);
 457         s->state &= ~SOCKET_WIN_REQ(win->index);
 458
 459         /* Release system memory */
 460         if (win->ctl.res) {
 461                 release_resource(win->ctl.res);
 462                 kfree(win->ctl.res);
 463                 win->ctl.res = NULL;
 464         }
 465         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 466
 467         win->magic = 0;
 468
 469         return 0;
 470 } /* pcmcia_release_window */
 471 EXPORT_SYMBOL(pcmcia_release_window);
 472
 473
 474 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 475                                  config_req_t *req)
 476 {
 477         int i;
 478         u_int base;
 479         struct pcmcia_socket *s = p_dev->socket;
 480         config_t *c;
 481         pccard_io_map iomap;
 482
 483         if (!(s->state & SOCKET_PRESENT))
 484                 return -ENODEV;;
 485
 486         if (req->IntType & INT_CARDBUS) {
 487                 ds_dbg(p_dev->socket, 0, "IntType may not be INT_CARDBUS\n");
 488                 return -EINVAL;
 489         }
 490         c = p_dev->function_config;
 491         if (c->state & CONFIG_LOCKED)
 492                 return -EACCES;
 493
 494         /* Do power control.  We don't allow changes in Vcc. */
 495         s->socket.Vpp = req->Vpp;
 496         if (s->ops->set_socket(s, &s->socket)) {
 497                 dev_printk(KERN_WARNING, &s->dev,
 498                            "Unable to set socket state\n");
 499                 return -EINVAL;
 500         }
 501
 502         /* Pick memory or I/O card, DMA mode, interrupt */
 503         c->IntType = req->IntType;
 504         c->Attributes = req->Attributes;
 505         if (req->IntType & INT_MEMORY_AND_IO)
 506                 s->socket.flags |= SS_IOCARD;
 507         if (req->IntType & INT_ZOOMED_VIDEO)
 508                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 509         if (req->Attributes & CONF_ENABLE_DMA)
 510                 s->socket.flags |= SS_DMA_MODE;
 511         if (req->Attributes & CONF_ENABLE_SPKR)
 512                 s->socket.flags |= SS_SPKR_ENA;
 513         if (req->Attributes & CONF_ENABLE_IRQ)
 514                 s->socket.io_irq = s->irq.AssignedIRQ;
 515         else
 516                 s->socket.io_irq = 0;
 517         s->ops->set_socket(s, &s->socket);
 518         s->lock_count++;
 519
 520         /* Set up CIS configuration registers */
 521         base = c->ConfigBase = req->ConfigBase;
 522         c->CardValues = req->Present;
 523         if (req->Present & PRESENT_COPY) {
 524                 c->Copy = req->Copy;
 525                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 526         }
 527         if (req->Present & PRESENT_OPTION) {
 528                 if (s->functions == 1) {
 529                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 530                 } else {
 531                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 532                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 533                         if (req->Present & PRESENT_IOBASE_0)
 534                                 c->Option |= COR_ADDR_DECODE;
 535                 }
 536                 if (c->state & CONFIG_IRQ_REQ)
 537                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 538                                 c->Option |= COR_LEVEL_REQ;
 539                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 540                 mdelay(40);
 541         }
 542         if (req->Present & PRESENT_STATUS) {
 543                 c->Status = req->Status;
 544                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 545         }
 546         if (req->Present & PRESENT_PIN_REPLACE) {
 547                 c->Pin = req->Pin;
 548                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 549         }
 550         if (req->Present & PRESENT_EXT_STATUS) {
 551                 c->ExtStatus = req->ExtStatus;
 552                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 553         }
 554         if (req->Present & PRESENT_IOBASE_0) {
 555                 u_char b = c->io.BasePort1 & 0xff;
 556                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 557                 b = (c->io.BasePort1 >> 8) & 0xff;
 558                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 559         }
 560         if (req->Present & PRESENT_IOSIZE) {
 561                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 562                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 563         }
 564
 565         /* Configure I/O windows */
 566         if (c->state & CONFIG_IO_REQ) {
 567                 iomap.speed = io_speed;
 568                 for (i = 0; i < MAX_IO_WIN; i++)
 569                         if (s->io[i].res) {
 570                                 iomap.map = i;
 571                                 iomap.flags = MAP_ACTIVE;
 572                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 573                                 case IO_DATA_PATH_WIDTH_16:
 574                                         iomap.flags |= MAP_16BIT; break;
 575                                 case IO_DATA_PATH_WIDTH_AUTO:
 576                                         iomap.flags |= MAP_AUTOSZ; break;
 577                                 default:
 578                                         break;
 579                                 }
 580                                 iomap.start = s->io[i].res->start;
 581                                 iomap.stop = s->io[i].res->end;
 582                                 s->ops->set_io_map(s, &iomap);
 583                                 s->io[i].Config++;
 584                         }
 585         }
 586
 587         c->state |= CONFIG_LOCKED;
 588         p_dev->_locked = 1;
 589         return 0;
 590 } /* pcmcia_request_configuration */
 591 EXPORT_SYMBOL(pcmcia_request_configuration);
 592
 593
 594 /** pcmcia_request_io
 595  *
 596  * Request_io() reserves ranges of port addresses for a socket.
 597  * I have not implemented range sharing or alias addressing.
 598  */
 599 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 600 {
 601         struct pcmcia_socket *s = p_dev->socket;
 602         config_t *c;
 603
 604         if (!(s->state & SOCKET_PRESENT))
 605                 return -ENODEV;
 606
 607         if (!req)
 608                 return -EINVAL;
 609         c = p_dev->function_config;
 610         if (c->state & CONFIG_LOCKED)
 611                 return -EACCES;
 612         if (c->state & CONFIG_IO_REQ)
 613                 return CS_IN_USE;
 614         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 615                 return CS_BAD_ATTRIBUTE;
 616         if ((req->NumPorts2 > 0) &&
 617             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 618                 return CS_BAD_ATTRIBUTE;
 619
 620         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 621                            req->NumPorts1, req->IOAddrLines))
 622                 return CS_IN_USE;
 623
 624         if (req->NumPorts2) {
 625                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 626                                    req->NumPorts2, req->IOAddrLines)) {
 627                         release_io_space(s, req->BasePort1, req->NumPorts1);
 628                         return CS_IN_USE;
 629                 }
 630         }
 631
 632         c->io = *req;
 633         c->state |= CONFIG_IO_REQ;
 634         p_dev->_io = 1;
 635         return 0;
 636 } /* pcmcia_request_io */
 637 EXPORT_SYMBOL(pcmcia_request_io);
 638
 639
 640 /** pcmcia_request_irq
 641  *
 642  * Request_irq() reserves an irq for this client.
 643  *
 644  * Also, since Linux only reserves irq's when they are actually
 645  * hooked, we don't guarantee that an irq will still be available
 646  * when the configuration is locked.  Now that I think about it,
 647  * there might be a way to fix this using a dummy handler.
 648  */
 649
 650 #ifdef CONFIG_PCMCIA_PROBE
 651 static irqreturn_t test_action(int cpl, void *dev_id)
 652 {
 653         return IRQ_NONE;
 654 }
 655 #endif
 656
 657 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 658 {
 659         struct pcmcia_socket *s = p_dev->socket;
 660         config_t *c;
 661         int ret = CS_IN_USE, irq = 0;
 662         int type;
 663
 664         if (!(s->state & SOCKET_PRESENT))
 665                 return -ENODEV;
 666         c = p_dev->function_config;
 667         if (c->state & CONFIG_LOCKED)
 668                 return -EACCES;
 669         if (c->state & CONFIG_IRQ_REQ)
 670                 return CS_IN_USE;
 671
 672         /* Decide what type of interrupt we are registering */
 673         type = 0;
 674         if (s->functions > 1)           /* All of this ought to be handled higher up */
 675                 type = IRQF_SHARED;
 676         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 677                 type = IRQF_SHARED;
 678
 679 #ifdef CONFIG_PCMCIA_PROBE
 680
 681 #ifdef IRQ_NOAUTOEN
 682         /* if the underlying IRQ infrastructure allows for it, only allocate
 683          * the IRQ, but do not enable it
 684          */
 685         if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 686                 type |= IRQ_NOAUTOEN;
 687 #endif /* IRQ_NOAUTOEN */
 688
 689         if (s->irq.AssignedIRQ != 0) {
 690                 /* If the interrupt is already assigned, it must be the same */
 691                 irq = s->irq.AssignedIRQ;
 692         } else {
 693                 int try;
 694                 u32 mask = s->irq_mask;
 695                 void *data = &p_dev->dev.driver; /* something unique to this device */
 696
 697                 for (try = 0; try < 64; try++) {
 698                         irq = try % 32;
 699
 700                         /* marked as available by driver, and not blocked by userspace? */
 701                         if (!((mask >> irq) & 1))
 702                                 continue;
 703
 704                         /* avoid an IRQ which is already used by a PCMCIA card */
 705                         if ((try < 32) && pcmcia_used_irq[irq])
 706                                 continue;
 707
 708                         /* register the correct driver, if possible, of check whether
 709                          * registering a dummy handle works, i.e. if the IRQ isn't
 710                          * marked as used by the kernel resource management core */
 711                         ret = request_irq(irq,
 712                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 713                                           type,
 714                                           p_dev->devname,
 715                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 716                         if (!ret) {
 717                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 718                                         free_irq(irq, data);
 719                                 break;
 720                         }
 721                 }
 722         }
 723 #endif
 724         /* only assign PCI irq if no IRQ already assigned */
 725         if (ret && !s->irq.AssignedIRQ) {
 726                 if (!s->pci_irq)
 727                         return ret;
 728                 type = IRQF_SHARED;
 729                 irq = s->pci_irq;
 730         }
 731
 732         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 733                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 734                         return CS_IN_USE;
 735         }
 736
 737         /* Make sure the fact the request type was overridden is passed back */
 738         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 739                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 740                 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
 741                         "request for exclusive IRQ could not be fulfilled.\n");
 742                 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
 743                         "needs updating to supported shared IRQ lines.\n");
 744         }
 745         c->irq.Attributes = req->Attributes;
 746         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 747         s->irq.Config++;
 748
 749         c->state |= CONFIG_IRQ_REQ;
 750         p_dev->_irq = 1;
 751
 752 #ifdef CONFIG_PCMCIA_PROBE
 753         pcmcia_used_irq[irq]++;
 754 #endif
 755
 756         return 0;
 757 } /* pcmcia_request_irq */
 758 EXPORT_SYMBOL(pcmcia_request_irq);
 759
 760
 761 /** pcmcia_request_window
 762  *
 763  * Request_window() establishes a mapping between card memory space
 764  * and system memory space.
 765  */
 766 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 767 {
 768         struct pcmcia_socket *s = (*p_dev)->socket;
 769         window_t *win;
 770         u_long align;
 771         int w;
 772
 773         if (!(s->state & SOCKET_PRESENT))
 774                 return -ENODEV;
 775         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 776                 return CS_BAD_ATTRIBUTE;
 777
 778         /* Window size defaults to smallest available */
 779         if (req->Size == 0)
 780                 req->Size = s->map_size;
 781         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 782                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 783                  req->Size : s->map_size);
 784         if (req->Size & (s->map_size-1))
 785                 return CS_BAD_SIZE;
 786         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 787             (req->Base & (align-1)))
 788                 return CS_BAD_BASE;
 789         if (req->Base)
 790                 align = 0;
 791
 792         /* Allocate system memory window */
 793         for (w = 0; w < MAX_WIN; w++)
 794                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 795         if (w == MAX_WIN)
 796                 return CS_IN_USE;
 797
 798         win = &s->win[w];
 799         win->magic = WINDOW_MAGIC;
 800         win->index = w;
 801         win->handle = *p_dev;
 802         win->sock = s;
 803
 804         if (!(s->features & SS_CAP_STATIC_MAP)) {
 805                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 806                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 807                 if (!win->ctl.res)
 808                         return CS_IN_USE;
 809         }
 810         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 811
 812         /* Configure the socket controller */
 813         win->ctl.map = w+1;
 814         win->ctl.flags = 0;
 815         win->ctl.speed = req->AccessSpeed;
 816         if (req->Attributes & WIN_MEMORY_TYPE)
 817                 win->ctl.flags |= MAP_ATTRIB;
 818         if (req->Attributes & WIN_ENABLE)
 819                 win->ctl.flags |= MAP_ACTIVE;
 820         if (req->Attributes & WIN_DATA_WIDTH_16)
 821                 win->ctl.flags |= MAP_16BIT;
 822         if (req->Attributes & WIN_USE_WAIT)
 823                 win->ctl.flags |= MAP_USE_WAIT;
 824         win->ctl.card_start = 0;
 825         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 826                 return CS_BAD_ARGS;
 827         s->state |= SOCKET_WIN_REQ(w);
 828
 829         /* Return window handle */
 830         if (s->features & SS_CAP_STATIC_MAP) {
 831                 req->Base = win->ctl.static_start;
 832         } else {
 833                 req->Base = win->ctl.res->start;
 834         }
 835         *wh = win;
 836
 837         return 0;
 838 } /* pcmcia_request_window */
 839 EXPORT_SYMBOL(pcmcia_request_window);
 840
 841 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 842         pcmcia_release_configuration(p_dev);
 843         pcmcia_release_io(p_dev, &p_dev->io);
 844         pcmcia_release_irq(p_dev, &p_dev->irq);
 845         if (p_dev->win)
 846                 pcmcia_release_window(p_dev->win);
 847 }
 848 EXPORT_SYMBOL(pcmcia_disable_device);
 849
 850
 851 struct pcmcia_cfg_mem {
 852         tuple_t tuple;
 853         cisparse_t parse;
 854         u8 buf[256];
 855         cistpl_cftable_entry_t dflt;
 856 };
 857
 858 /**
 859  * pcmcia_loop_config() - loop over configuration options
 860  * @p_dev:      the struct pcmcia_device which we need to loop for.
 861  * @conf_check: function to call for each configuration option.
 862  *              It gets passed the struct pcmcia_device, the CIS data
 863  *              describing the configuration option, and private data
 864  *              being passed to pcmcia_loop_config()
 865  * @priv_data:  private data to be passed to the conf_check function.
 866  *
 867  * pcmcia_loop_config() loops over all configuration options, and calls
 868  * the driver-specific conf_check() for each one, checking whether
 869  * it is a valid one.
 870  */
 871 int pcmcia_loop_config(struct pcmcia_device *p_dev,
 872                        int      (*conf_check)   (struct pcmcia_device *p_dev,
 873                                                  cistpl_cftable_entry_t *cfg,
 874                                                  cistpl_cftable_entry_t *dflt,
 875                                                  unsigned int vcc,
 876                                                  void *priv_data),
 877                        void *priv_data)
 878 {
 879         struct pcmcia_cfg_mem *cfg_mem;
 880
 881         tuple_t *tuple;
 882         int ret = -ENODEV;
 883         unsigned int vcc;
 884
 885         cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
 886         if (cfg_mem == NULL)
 887                 return -ENOMEM;
 888
 889         /* get the current Vcc setting */
 890         vcc = p_dev->socket->socket.Vcc;
 891
 892         tuple = &cfg_mem->tuple;
 893         tuple->TupleData = cfg_mem->buf;
 894         tuple->TupleDataMax = 255;
 895         tuple->TupleOffset = 0;
 896         tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY;
 897         tuple->Attributes = 0;
 898
 899         ret = pcmcia_get_first_tuple(p_dev, tuple);
 900         while (!ret) {
 901                 cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry;
 902
 903                 if (pcmcia_get_tuple_data(p_dev, tuple))
 904                         goto next_entry;
 905
 906                 if (pcmcia_parse_tuple(p_dev, tuple, &cfg_mem->parse))
 907                         goto next_entry;
 908
 909                 /* default values */
 910                 p_dev->conf.ConfigIndex = cfg->index;
 911                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 912                         cfg_mem->dflt = *cfg;
 913
 914                 ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data);
 915                 if (!ret)
 916                         break;
 917
 918 next_entry:
 919                 ret = pcmcia_get_next_tuple(p_dev, tuple);
 920         }
 921
 922         return ret;
 923 }
 924 EXPORT_SYMBOL(pcmcia_loop_config);