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/bulkmem.h>
  29 #include <pcmcia/cistpl.h>
  30 #include <pcmcia/cisreg.h>
  31 #include <pcmcia/ds.h>
  32
  33 #include "cs_internal.h"
  34 #include "ds_internal.h"
  35
  36
  37 /* Access speed for IO windows */
  38 static int io_speed = 0;
  39 module_param(io_speed, int, 0444);
  40
  41
  42 #ifdef CONFIG_PCMCIA_PROBE
  43 #include <asm/irq.h>
  44 /* mask of IRQs already reserved by other cards, we should avoid using them */
  45 static u8 pcmcia_used_irq[NR_IRQS];
  46 #endif
  47
  48
  49 #ifdef DEBUG
  50 extern int ds_pc_debug;
  51 #define cs_socket_name(skt)    ((skt)->dev.class_id)
  52
  53 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  54         if (ds_pc_debug >= lvl)                                 \
  55                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  56                         cs_socket_name(skt) , ## arg);          \
  57 } while (0)
  58 #else
  59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  60 #endif
  61
  62
  63
  64 /** alloc_io_space
  65  *
  66  * Special stuff for managing IO windows, because they are scarce
  67  */
  68
  69 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
  70                           ioaddr_t num, u_int lines)
  71 {
  72         int i;
  73         kio_addr_t try, align;
  74
  75         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  76         if (align && (align < num)) {
  77                 if (*base) {
  78                         ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
  79                                num, align);
  80                         align = 0;
  81                 } else
  82                         while (align && (align < num)) align <<= 1;
  83         }
  84         if (*base & ~(align-1)) {
  85                 ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
  86                        *base, align);
  87                 align = 0;
  88         }
  89         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  90                 *base = s->io_offset | (*base & 0x0fff);
  91                 return 0;
  92         }
  93         /* Check for an already-allocated window that must conflict with
  94          * what was asked for.  It is a hack because it does not catch all
  95          * potential conflicts, just the most obvious ones.
  96          */
  97         for (i = 0; i < MAX_IO_WIN; i++)
  98                 if ((s->io[i].res) &&
  99                     ((s->io[i].res->start & (align-1)) == *base))
 100                         return 1;
 101         for (i = 0; i < MAX_IO_WIN; i++) {
 102                 if (!s->io[i].res) {
 103                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 104                         if (s->io[i].res) {
 105                                 *base = s->io[i].res->start;
 106                                 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
 107                                 s->io[i].InUse = num;
 108                                 break;
 109                         } else
 110                                 return 1;
 111                 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
 112                         continue;
 113                 /* Try to extend top of window */
 114                 try = s->io[i].res->end + 1;
 115                 if ((*base == 0) || (*base == try))
 116                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 117                                                     s->io[i].res->end + num, s) == 0) {
 118                                 *base = try;
 119                                 s->io[i].InUse += num;
 120                                 break;
 121                         }
 122                 /* Try to extend bottom of window */
 123                 try = s->io[i].res->start - num;
 124                 if ((*base == 0) || (*base == try))
 125                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 126                                                     s->io[i].res->end, s) == 0) {
 127                                 *base = try;
 128                                 s->io[i].InUse += num;
 129                                 break;
 130                         }
 131         }
 132         return (i == MAX_IO_WIN);
 133 } /* alloc_io_space */
 134
 135
 136 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
 137                              ioaddr_t num)
 138 {
 139         int i;
 140
 141         for (i = 0; i < MAX_IO_WIN; i++) {
 142                 if (!s->io[i].res)
 143                         continue;
 144                 if ((s->io[i].res->start <= base) &&
 145                     (s->io[i].res->end >= base+num-1)) {
 146                         s->io[i].InUse -= num;
 147                         /* Free the window if no one else is using it */
 148                         if (s->io[i].InUse == 0) {
 149                                 release_resource(s->io[i].res);
 150                                 kfree(s->io[i].res);
 151                                 s->io[i].res = NULL;
 152                         }
 153                 }
 154         }
 155 } /* release_io_space */
 156
 157
 158 /** pccard_access_configuration_register
 159  *
 160  * Access_configuration_register() reads and writes configuration
 161  * registers in attribute memory.  Memory window 0 is reserved for
 162  * this and the tuple reading services.
 163  */
 164
 165 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
 166                                          conf_reg_t *reg)
 167 {
 168         struct pcmcia_socket *s;
 169         config_t *c;
 170         int addr;
 171         u_char val;
 172
 173         if (!p_dev || !p_dev->function_config)
 174                 return CS_NO_CARD;
 175
 176         s = p_dev->socket;
 177         c = p_dev->function_config;
 178
 179         if (!(c->state & CONFIG_LOCKED))
 180                 return CS_CONFIGURATION_LOCKED;
 181
 182         addr = (c->ConfigBase + reg->Offset) >> 1;
 183
 184         switch (reg->Action) {
 185         case CS_READ:
 186                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 187                 reg->Value = val;
 188                 break;
 189         case CS_WRITE:
 190                 val = reg->Value;
 191                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 192                 break;
 193         default:
 194                 return CS_BAD_ARGS;
 195                 break;
 196         }
 197         return CS_SUCCESS;
 198 } /* pcmcia_access_configuration_register */
 199 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 200
 201
 202 int pccard_get_configuration_info(struct pcmcia_socket *s,
 203                                   struct pcmcia_device *p_dev,
 204                                   config_info_t *config)
 205 {
 206         config_t *c;
 207
 208         if (!(s->state & SOCKET_PRESENT))
 209                 return CS_NO_CARD;
 210
 211
 212 #ifdef CONFIG_CARDBUS
 213         if (s->state & SOCKET_CARDBUS) {
 214                 memset(config, 0, sizeof(config_info_t));
 215                 config->Vcc = s->socket.Vcc;
 216                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 217                 config->Option = s->cb_dev->subordinate->number;
 218                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 219                         config->Attributes = CONF_VALID_CLIENT;
 220                         config->IntType = INT_CARDBUS;
 221                         config->AssignedIRQ = s->irq.AssignedIRQ;
 222                         if (config->AssignedIRQ)
 223                                 config->Attributes |= CONF_ENABLE_IRQ;
 224                         if (s->io[0].res) {
 225                                 config->BasePort1 = s->io[0].res->start;
 226                                 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
 227                         }
 228                 }
 229                 return CS_SUCCESS;
 230         }
 231 #endif
 232
 233         if (p_dev) {
 234                 c = p_dev->function_config;
 235                 config->Function = p_dev->func;
 236         } else {
 237                 c = NULL;
 238                 config->Function = 0;
 239         }
 240
 241         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 242                 config->Attributes = 0;
 243                 config->Vcc = s->socket.Vcc;
 244                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 245                 return CS_SUCCESS;
 246         }
 247
 248         config->Attributes = c->Attributes | CONF_VALID_CLIENT;
 249         config->Vcc = s->socket.Vcc;
 250         config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 251         config->IntType = c->IntType;
 252         config->ConfigBase = c->ConfigBase;
 253         config->Status = c->Status;
 254         config->Pin = c->Pin;
 255         config->Copy = c->Copy;
 256         config->Option = c->Option;
 257         config->ExtStatus = c->ExtStatus;
 258         config->Present = config->CardValues = c->CardValues;
 259         config->IRQAttributes = c->irq.Attributes;
 260         config->AssignedIRQ = s->irq.AssignedIRQ;
 261         config->BasePort1 = c->io.BasePort1;
 262         config->NumPorts1 = c->io.NumPorts1;
 263         config->Attributes1 = c->io.Attributes1;
 264         config->BasePort2 = c->io.BasePort2;
 265         config->NumPorts2 = c->io.NumPorts2;
 266         config->Attributes2 = c->io.Attributes2;
 267         config->IOAddrLines = c->io.IOAddrLines;
 268
 269         return CS_SUCCESS;
 270 } /* pccard_get_configuration_info */
 271
 272 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 273                                   config_info_t *config)
 274 {
 275         return pccard_get_configuration_info(p_dev->socket, p_dev,
 276                                              config);
 277 }
 278 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 279
 280
 281 /** pcmcia_get_window
 282  */
 283 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 284                       int idx, win_req_t *req)
 285 {
 286         window_t *win;
 287         int w;
 288
 289         if (!s || !(s->state & SOCKET_PRESENT))
 290                 return CS_NO_CARD;
 291         for (w = idx; w < MAX_WIN; w++)
 292                 if (s->state & SOCKET_WIN_REQ(w))
 293                         break;
 294         if (w == MAX_WIN)
 295                 return CS_NO_MORE_ITEMS;
 296         win = &s->win[w];
 297         req->Base = win->ctl.res->start;
 298         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 299         req->AccessSpeed = win->ctl.speed;
 300         req->Attributes = 0;
 301         if (win->ctl.flags & MAP_ATTRIB)
 302                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 303         if (win->ctl.flags & MAP_ACTIVE)
 304                 req->Attributes |= WIN_ENABLE;
 305         if (win->ctl.flags & MAP_16BIT)
 306                 req->Attributes |= WIN_DATA_WIDTH_16;
 307         if (win->ctl.flags & MAP_USE_WAIT)
 308                 req->Attributes |= WIN_USE_WAIT;
 309         *handle = win;
 310         return CS_SUCCESS;
 311 } /* pcmcia_get_window */
 312 EXPORT_SYMBOL(pcmcia_get_window);
 313
 314
 315 /** pccard_get_status
 316  *
 317  * Get the current socket state bits.  We don't support the latched
 318  * SocketState yet: I haven't seen any point for it.
 319  */
 320
 321 int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev,
 322                       cs_status_t *status)
 323 {
 324         config_t *c;
 325         int val;
 326
 327         s->ops->get_status(s, &val);
 328         status->CardState = status->SocketState = 0;
 329         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 330         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 331         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 332         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 333         if (s->state & SOCKET_SUSPEND)
 334                 status->CardState |= CS_EVENT_PM_SUSPEND;
 335         if (!(s->state & SOCKET_PRESENT))
 336                 return CS_NO_CARD;
 337
 338         c = (p_dev) ? p_dev->function_config : NULL;
 339
 340         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 341             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 342                 u_char reg;
 343                 if (c->CardValues & PRESENT_PIN_REPLACE) {
 344                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 345                         status->CardState |=
 346                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 347                         status->CardState |=
 348                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 349                         status->CardState |=
 350                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 351                         status->CardState |=
 352                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 353                 } else {
 354                         /* No PRR?  Then assume we're always ready */
 355                         status->CardState |= CS_EVENT_READY_CHANGE;
 356                 }
 357                 if (c->CardValues & PRESENT_EXT_STATUS) {
 358                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 359                         status->CardState |=
 360                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 361                 }
 362                 return CS_SUCCESS;
 363         }
 364         status->CardState |=
 365                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 366         status->CardState |=
 367                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 368         status->CardState |=
 369                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 370         status->CardState |=
 371                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 372         return CS_SUCCESS;
 373 } /* pccard_get_status */
 374
 375 int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status)
 376 {
 377         return pccard_get_status(p_dev->socket, p_dev, status);
 378 }
 379 EXPORT_SYMBOL(pcmcia_get_status);
 380
 381
 382
 383 /** pcmcia_get_mem_page
 384  *
 385  * Change the card address of an already open memory window.
 386  */
 387 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 388 {
 389         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 390                 return CS_BAD_HANDLE;
 391         req->Page = 0;
 392         req->CardOffset = win->ctl.card_start;
 393         return CS_SUCCESS;
 394 } /* pcmcia_get_mem_page */
 395 EXPORT_SYMBOL(pcmcia_get_mem_page);
 396
 397
 398 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 399 {
 400         struct pcmcia_socket *s;
 401         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 402                 return CS_BAD_HANDLE;
 403         if (req->Page != 0)
 404                 return CS_BAD_PAGE;
 405         s = win->sock;
 406         win->ctl.card_start = req->CardOffset;
 407         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 408                 return CS_BAD_OFFSET;
 409         return CS_SUCCESS;
 410 } /* pcmcia_map_mem_page */
 411 EXPORT_SYMBOL(pcmcia_map_mem_page);
 412
 413
 414 /** pcmcia_modify_configuration
 415  *
 416  * Modify a locked socket configuration
 417  */
 418 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 419                                 modconf_t *mod)
 420 {
 421         struct pcmcia_socket *s;
 422         config_t *c;
 423
 424         s = p_dev->socket;
 425         c = p_dev->function_config;
 426
 427         if (!(s->state & SOCKET_PRESENT))
 428                 return CS_NO_CARD;
 429         if (!(c->state & CONFIG_LOCKED))
 430                 return CS_CONFIGURATION_LOCKED;
 431
 432         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 433                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 434                         c->Attributes |= CONF_ENABLE_IRQ;
 435                         s->socket.io_irq = s->irq.AssignedIRQ;
 436                 } else {
 437                         c->Attributes &= ~CONF_ENABLE_IRQ;
 438                         s->socket.io_irq = 0;
 439                 }
 440                 s->ops->set_socket(s, &s->socket);
 441         }
 442
 443         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 444                 return CS_BAD_VCC;
 445
 446         /* We only allow changing Vpp1 and Vpp2 to the same value */
 447         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 448             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 449                 if (mod->Vpp1 != mod->Vpp2)
 450                         return CS_BAD_VPP;
 451                 s->socket.Vpp = mod->Vpp1;
 452                 if (s->ops->set_socket(s, &s->socket))
 453                         return CS_BAD_VPP;
 454         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 455                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 456                 return CS_BAD_VPP;
 457
 458         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
 459                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
 460                 pccard_io_map io_on;
 461                 int i;
 462
 463                 io_on.speed = io_speed;
 464                 for (i = 0; i < MAX_IO_WIN; i++) {
 465                         if (!s->io[i].res)
 466                                 continue;
 467                         io_off.map = i;
 468                         io_on.map = i;
 469
 470                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
 471                         io_on.start = s->io[i].res->start;
 472                         io_on.stop = s->io[i].res->end;
 473
 474                         s->ops->set_io_map(s, &io_off);
 475                         mdelay(40);
 476                         s->ops->set_io_map(s, &io_on);
 477                 }
 478         }
 479
 480         return CS_SUCCESS;
 481 } /* modify_configuration */
 482 EXPORT_SYMBOL(pcmcia_modify_configuration);
 483
 484
 485 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 486 {
 487         pccard_io_map io = { 0, 0, 0, 0, 1 };
 488         struct pcmcia_socket *s = p_dev->socket;
 489         config_t *c = p_dev->function_config;
 490         int i;
 491
 492         if (p_dev->_locked) {
 493                 p_dev->_locked = 0;
 494                 if (--(s->lock_count) == 0) {
 495                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 496                         s->socket.Vpp = 0;
 497                         s->socket.io_irq = 0;
 498                         s->ops->set_socket(s, &s->socket);
 499                 }
 500         }
 501         if (c->state & CONFIG_LOCKED) {
 502                 c->state &= ~CONFIG_LOCKED;
 503                 if (c->state & CONFIG_IO_REQ)
 504                         for (i = 0; i < MAX_IO_WIN; i++) {
 505                                 if (!s->io[i].res)
 506                                         continue;
 507                                 s->io[i].Config--;
 508                                 if (s->io[i].Config != 0)
 509                                         continue;
 510                                 io.map = i;
 511                                 s->ops->set_io_map(s, &io);
 512                         }
 513         }
 514
 515         return CS_SUCCESS;
 516 } /* pcmcia_release_configuration */
 517
 518
 519 /** pcmcia_release_io
 520  *
 521  * Release_io() releases the I/O ranges allocated by a client.  This
 522  * may be invoked some time after a card ejection has already dumped
 523  * the actual socket configuration, so if the client is "stale", we
 524  * don't bother checking the port ranges against the current socket
 525  * values.
 526  */
 527 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 528 {
 529         struct pcmcia_socket *s = p_dev->socket;
 530         config_t *c = p_dev->function_config;
 531
 532         if (!p_dev->_io )
 533                 return CS_BAD_HANDLE;
 534
 535         p_dev->_io = 0;
 536
 537         if ((c->io.BasePort1 != req->BasePort1) ||
 538             (c->io.NumPorts1 != req->NumPorts1) ||
 539             (c->io.BasePort2 != req->BasePort2) ||
 540             (c->io.NumPorts2 != req->NumPorts2))
 541                 return CS_BAD_ARGS;
 542
 543         c->state &= ~CONFIG_IO_REQ;
 544
 545         release_io_space(s, req->BasePort1, req->NumPorts1);
 546         if (req->NumPorts2)
 547                 release_io_space(s, req->BasePort2, req->NumPorts2);
 548
 549         return CS_SUCCESS;
 550 } /* pcmcia_release_io */
 551
 552
 553 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 554 {
 555         struct pcmcia_socket *s = p_dev->socket;
 556         config_t *c= p_dev->function_config;
 557
 558         if (!p_dev->_irq)
 559                 return CS_BAD_HANDLE;
 560         p_dev->_irq = 0;
 561
 562         if (c->state & CONFIG_LOCKED)
 563                 return CS_CONFIGURATION_LOCKED;
 564         if (c->irq.Attributes != req->Attributes)
 565                 return CS_BAD_ATTRIBUTE;
 566         if (s->irq.AssignedIRQ != req->AssignedIRQ)
 567                 return CS_BAD_IRQ;
 568         if (--s->irq.Config == 0) {
 569                 c->state &= ~CONFIG_IRQ_REQ;
 570                 s->irq.AssignedIRQ = 0;
 571         }
 572
 573         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 574                 free_irq(req->AssignedIRQ, req->Instance);
 575         }
 576
 577 #ifdef CONFIG_PCMCIA_PROBE
 578         pcmcia_used_irq[req->AssignedIRQ]--;
 579 #endif
 580
 581         return CS_SUCCESS;
 582 } /* pcmcia_release_irq */
 583
 584
 585 int pcmcia_release_window(window_handle_t win)
 586 {
 587         struct pcmcia_socket *s;
 588
 589         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 590                 return CS_BAD_HANDLE;
 591         s = win->sock;
 592         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
 593                 return CS_BAD_HANDLE;
 594
 595         /* Shut down memory window */
 596         win->ctl.flags &= ~MAP_ACTIVE;
 597         s->ops->set_mem_map(s, &win->ctl);
 598         s->state &= ~SOCKET_WIN_REQ(win->index);
 599
 600         /* Release system memory */
 601         if (win->ctl.res) {
 602                 release_resource(win->ctl.res);
 603                 kfree(win->ctl.res);
 604                 win->ctl.res = NULL;
 605         }
 606         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
 607
 608         win->magic = 0;
 609
 610         return CS_SUCCESS;
 611 } /* pcmcia_release_window */
 612 EXPORT_SYMBOL(pcmcia_release_window);
 613
 614
 615 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 616                                  config_req_t *req)
 617 {
 618         int i;
 619         u_int base;
 620         struct pcmcia_socket *s = p_dev->socket;
 621         config_t *c;
 622         pccard_io_map iomap;
 623
 624         if (!(s->state & SOCKET_PRESENT))
 625                 return CS_NO_CARD;
 626
 627         if (req->IntType & INT_CARDBUS)
 628                 return CS_UNSUPPORTED_MODE;
 629         c = p_dev->function_config;
 630         if (c->state & CONFIG_LOCKED)
 631                 return CS_CONFIGURATION_LOCKED;
 632
 633         /* Do power control.  We don't allow changes in Vcc. */
 634         s->socket.Vpp = req->Vpp;
 635         if (s->ops->set_socket(s, &s->socket))
 636                 return CS_BAD_VPP;
 637
 638         /* Pick memory or I/O card, DMA mode, interrupt */
 639         c->IntType = req->IntType;
 640         c->Attributes = req->Attributes;
 641         if (req->IntType & INT_MEMORY_AND_IO)
 642                 s->socket.flags |= SS_IOCARD;
 643         if (req->IntType & INT_ZOOMED_VIDEO)
 644                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 645         if (req->Attributes & CONF_ENABLE_DMA)
 646                 s->socket.flags |= SS_DMA_MODE;
 647         if (req->Attributes & CONF_ENABLE_SPKR)
 648                 s->socket.flags |= SS_SPKR_ENA;
 649         if (req->Attributes & CONF_ENABLE_IRQ)
 650                 s->socket.io_irq = s->irq.AssignedIRQ;
 651         else
 652                 s->socket.io_irq = 0;
 653         s->ops->set_socket(s, &s->socket);
 654         s->lock_count++;
 655
 656         /* Set up CIS configuration registers */
 657         base = c->ConfigBase = req->ConfigBase;
 658         c->CardValues = req->Present;
 659         if (req->Present & PRESENT_COPY) {
 660                 c->Copy = req->Copy;
 661                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 662         }
 663         if (req->Present & PRESENT_OPTION) {
 664                 if (s->functions == 1) {
 665                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 666                 } else {
 667                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 668                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 669                         if (req->Present & PRESENT_IOBASE_0)
 670                                 c->Option |= COR_ADDR_DECODE;
 671                 }
 672                 if (c->state & CONFIG_IRQ_REQ)
 673                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 674                                 c->Option |= COR_LEVEL_REQ;
 675                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 676                 mdelay(40);
 677         }
 678         if (req->Present & PRESENT_STATUS) {
 679                 c->Status = req->Status;
 680                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 681         }
 682         if (req->Present & PRESENT_PIN_REPLACE) {
 683                 c->Pin = req->Pin;
 684                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 685         }
 686         if (req->Present & PRESENT_EXT_STATUS) {
 687                 c->ExtStatus = req->ExtStatus;
 688                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 689         }
 690         if (req->Present & PRESENT_IOBASE_0) {
 691                 u_char b = c->io.BasePort1 & 0xff;
 692                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 693                 b = (c->io.BasePort1 >> 8) & 0xff;
 694                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 695         }
 696         if (req->Present & PRESENT_IOSIZE) {
 697                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 698                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 699         }
 700
 701         /* Configure I/O windows */
 702         if (c->state & CONFIG_IO_REQ) {
 703                 iomap.speed = io_speed;
 704                 for (i = 0; i < MAX_IO_WIN; i++)
 705                         if (s->io[i].res) {
 706                                 iomap.map = i;
 707                                 iomap.flags = MAP_ACTIVE;
 708                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
 709                                 case IO_DATA_PATH_WIDTH_16:
 710                                         iomap.flags |= MAP_16BIT; break;
 711                                 case IO_DATA_PATH_WIDTH_AUTO:
 712                                         iomap.flags |= MAP_AUTOSZ; break;
 713                                 default:
 714                                         break;
 715                                 }
 716                                 iomap.start = s->io[i].res->start;
 717                                 iomap.stop = s->io[i].res->end;
 718                                 s->ops->set_io_map(s, &iomap);
 719                                 s->io[i].Config++;
 720                         }
 721         }
 722
 723         c->state |= CONFIG_LOCKED;
 724         p_dev->_locked = 1;
 725         return CS_SUCCESS;
 726 } /* pcmcia_request_configuration */
 727 EXPORT_SYMBOL(pcmcia_request_configuration);
 728
 729
 730 /** pcmcia_request_io
 731  *
 732  * Request_io() reserves ranges of port addresses for a socket.
 733  * I have not implemented range sharing or alias addressing.
 734  */
 735 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 736 {
 737         struct pcmcia_socket *s = p_dev->socket;
 738         config_t *c;
 739
 740         if (!(s->state & SOCKET_PRESENT))
 741                 return CS_NO_CARD;
 742
 743         if (!req)
 744                 return CS_UNSUPPORTED_MODE;
 745         c = p_dev->function_config;
 746         if (c->state & CONFIG_LOCKED)
 747                 return CS_CONFIGURATION_LOCKED;
 748         if (c->state & CONFIG_IO_REQ)
 749                 return CS_IN_USE;
 750         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 751                 return CS_BAD_ATTRIBUTE;
 752         if ((req->NumPorts2 > 0) &&
 753             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 754                 return CS_BAD_ATTRIBUTE;
 755
 756         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 757                            req->NumPorts1, req->IOAddrLines))
 758                 return CS_IN_USE;
 759
 760         if (req->NumPorts2) {
 761                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 762                                    req->NumPorts2, req->IOAddrLines)) {
 763                         release_io_space(s, req->BasePort1, req->NumPorts1);
 764                         return CS_IN_USE;
 765                 }
 766         }
 767
 768         c->io = *req;
 769         c->state |= CONFIG_IO_REQ;
 770         p_dev->_io = 1;
 771         return CS_SUCCESS;
 772 } /* pcmcia_request_io */
 773 EXPORT_SYMBOL(pcmcia_request_io);
 774
 775
 776 /** pcmcia_request_irq
 777  *
 778  * Request_irq() reserves an irq for this client.
 779  *
 780  * Also, since Linux only reserves irq's when they are actually
 781  * hooked, we don't guarantee that an irq will still be available
 782  * when the configuration is locked.  Now that I think about it,
 783  * there might be a way to fix this using a dummy handler.
 784  */
 785
 786 #ifdef CONFIG_PCMCIA_PROBE
 787 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
 788 {
 789         return IRQ_NONE;
 790 }
 791 #endif
 792
 793 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 794 {
 795         struct pcmcia_socket *s = p_dev->socket;
 796         config_t *c;
 797         int ret = CS_IN_USE, irq = 0;
 798         int type;
 799
 800         if (!(s->state & SOCKET_PRESENT))
 801                 return CS_NO_CARD;
 802         c = p_dev->function_config;
 803         if (c->state & CONFIG_LOCKED)
 804                 return CS_CONFIGURATION_LOCKED;
 805         if (c->state & CONFIG_IRQ_REQ)
 806                 return CS_IN_USE;
 807
 808         /* Decide what type of interrupt we are registering */
 809         type = 0;
 810         if (s->functions > 1)           /* All of this ought to be handled higher up */
 811                 type = IRQF_SHARED;
 812         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
 813                 type = IRQF_SHARED;
 814
 815 #ifdef CONFIG_PCMCIA_PROBE
 816         if (s->irq.AssignedIRQ != 0) {
 817                 /* If the interrupt is already assigned, it must be the same */
 818                 irq = s->irq.AssignedIRQ;
 819         } else {
 820                 int try;
 821                 u32 mask = s->irq_mask;
 822                 void *data = &p_dev->dev.driver; /* something unique to this device */
 823
 824                 for (try = 0; try < 64; try++) {
 825                         irq = try % 32;
 826
 827                         /* marked as available by driver, and not blocked by userspace? */
 828                         if (!((mask >> irq) & 1))
 829                                 continue;
 830
 831                         /* avoid an IRQ which is already used by a PCMCIA card */
 832                         if ((try < 32) && pcmcia_used_irq[irq])
 833                                 continue;
 834
 835                         /* register the correct driver, if possible, of check whether
 836                          * registering a dummy handle works, i.e. if the IRQ isn't
 837                          * marked as used by the kernel resource management core */
 838                         ret = request_irq(irq,
 839                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 840                                           type,
 841                                           p_dev->devname,
 842                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 843                         if (!ret) {
 844                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 845                                         free_irq(irq, data);
 846                                 break;
 847                         }
 848                 }
 849         }
 850 #endif
 851         /* only assign PCI irq if no IRQ already assigned */
 852         if (ret && !s->irq.AssignedIRQ) {
 853                 if (!s->pci_irq)
 854                         return ret;
 855                 type = IRQF_SHARED;
 856                 irq = s->pci_irq;
 857         }
 858
 859         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
 860                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
 861                         return CS_IN_USE;
 862         }
 863
 864         /* Make sure the fact the request type was overridden is passed back */
 865         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
 866                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
 867                 printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
 868                 printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n");
 869         }
 870         c->irq.Attributes = req->Attributes;
 871         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 872         s->irq.Config++;
 873
 874         c->state |= CONFIG_IRQ_REQ;
 875         p_dev->_irq = 1;
 876
 877 #ifdef CONFIG_PCMCIA_PROBE
 878         pcmcia_used_irq[irq]++;
 879 #endif
 880
 881         return CS_SUCCESS;
 882 } /* pcmcia_request_irq */
 883 EXPORT_SYMBOL(pcmcia_request_irq);
 884
 885
 886 /** pcmcia_request_window
 887  *
 888  * Request_window() establishes a mapping between card memory space
 889  * and system memory space.
 890  */
 891 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 892 {
 893         struct pcmcia_socket *s = (*p_dev)->socket;
 894         window_t *win;
 895         u_long align;
 896         int w;
 897
 898         if (!(s->state & SOCKET_PRESENT))
 899                 return CS_NO_CARD;
 900         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 901                 return CS_BAD_ATTRIBUTE;
 902
 903         /* Window size defaults to smallest available */
 904         if (req->Size == 0)
 905                 req->Size = s->map_size;
 906         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 907                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 908                  req->Size : s->map_size);
 909         if (req->Size & (s->map_size-1))
 910                 return CS_BAD_SIZE;
 911         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 912             (req->Base & (align-1)))
 913                 return CS_BAD_BASE;
 914         if (req->Base)
 915                 align = 0;
 916
 917         /* Allocate system memory window */
 918         for (w = 0; w < MAX_WIN; w++)
 919                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 920         if (w == MAX_WIN)
 921                 return CS_OUT_OF_RESOURCE;
 922
 923         win = &s->win[w];
 924         win->magic = WINDOW_MAGIC;
 925         win->index = w;
 926         win->handle = *p_dev;
 927         win->sock = s;
 928
 929         if (!(s->features & SS_CAP_STATIC_MAP)) {
 930                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 931                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 932                 if (!win->ctl.res)
 933                         return CS_IN_USE;
 934         }
 935         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 936
 937         /* Configure the socket controller */
 938         win->ctl.map = w+1;
 939         win->ctl.flags = 0;
 940         win->ctl.speed = req->AccessSpeed;
 941         if (req->Attributes & WIN_MEMORY_TYPE)
 942                 win->ctl.flags |= MAP_ATTRIB;
 943         if (req->Attributes & WIN_ENABLE)
 944                 win->ctl.flags |= MAP_ACTIVE;
 945         if (req->Attributes & WIN_DATA_WIDTH_16)
 946                 win->ctl.flags |= MAP_16BIT;
 947         if (req->Attributes & WIN_USE_WAIT)
 948                 win->ctl.flags |= MAP_USE_WAIT;
 949         win->ctl.card_start = 0;
 950         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 951                 return CS_BAD_ARGS;
 952         s->state |= SOCKET_WIN_REQ(w);
 953
 954         /* Return window handle */
 955         if (s->features & SS_CAP_STATIC_MAP) {
 956                 req->Base = win->ctl.static_start;
 957         } else {
 958                 req->Base = win->ctl.res->start;
 959         }
 960         *wh = win;
 961
 962         return CS_SUCCESS;
 963 } /* pcmcia_request_window */
 964 EXPORT_SYMBOL(pcmcia_request_window);
 965
 966 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
 967         pcmcia_release_configuration(p_dev);
 968         pcmcia_release_io(p_dev, &p_dev->io);
 969         pcmcia_release_irq(p_dev, &p_dev->irq);
 970         if (&p_dev->win)
 971                 pcmcia_release_window(p_dev->win);
 972 }
 973 EXPORT_SYMBOL(pcmcia_disable_device);