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