drivers/pcmcia/pcmcia_resource.c

   1 /*
   2  * PCMCIA 16-bit resource management functions
   3  *
   4  * The initial developer of the original code is David A. Hinds
   5  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
   6  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
   7  *
   8  * Copyright (C) 1999        David A. Hinds
   9  * Copyright (C) 2004-2005   Dominik Brodowski
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  */
  16
  17 #include <linux/config.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/delay.h>
  22 #include <linux/pci.h>
  23 #include <linux/device.h>
  24
  25 #define IN_CARD_SERVICES
  26 #include <pcmcia/cs_types.h>
  27 #include <pcmcia/ss.h>
  28 #include <pcmcia/cs.h>
  29 #include <pcmcia/bulkmem.h>
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/cisreg.h>
  32 #include <pcmcia/ds.h>
  33
  34 #include "cs_internal.h"
  35 #include "ds_internal.h"
  36
  37
  38 /* Access speed for IO windows */
  39 static int io_speed = 0;
  40 module_param(io_speed, int, 0444);
  41
  42
  43 #ifdef CONFIG_PCMCIA_PROBE
  44 #include <asm/irq.h>
  45 /* mask of IRQs already reserved by other cards, we should avoid using them */
  46 static u8 pcmcia_used_irq[NR_IRQS];
  47 #endif
  48
  49
  50 #ifdef DEBUG
  51 extern int ds_pc_debug;
  52 #define cs_socket_name(skt)    ((skt)->dev.class_id)
  53
  54 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
  55         if (ds_pc_debug >= lvl)                                 \
  56                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
  57                         cs_socket_name(skt) , ## arg);          \
  58 } while (0)
  59 #else
  60 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  61 #endif
  62
  63
  64
  65 /** alloc_io_space
  66  *
  67  * Special stuff for managing IO windows, because they are scarce
  68  */
  69
  70 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
  71                           ioaddr_t num, u_int lines)
  72 {
  73         int i;
  74         kio_addr_t try, align;
  75
  76         align = (*base) ? (lines ? 1<<lines : 0) : 1;
  77         if (align && (align < num)) {
  78                 if (*base) {
  79                         ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
  80                                num, align);
  81                         align = 0;
  82                 } else
  83                         while (align && (align < num)) align <<= 1;
  84         }
  85         if (*base & ~(align-1)) {
  86                 ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
  87                        *base, align);
  88                 align = 0;
  89         }
  90         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
  91                 *base = s->io_offset | (*base & 0x0fff);
  92                 s->io[0].Attributes = attr;
  93                 return 0;
  94         }
  95         /* Check for an already-allocated window that must conflict with
  96          * what was asked for.  It is a hack because it does not catch all
  97          * potential conflicts, just the most obvious ones.
  98          */
  99         for (i = 0; i < MAX_IO_WIN; i++)
 100                 if ((s->io[i].NumPorts != 0) &&
 101                     ((s->io[i].BasePort & (align-1)) == *base))
 102                         return 1;
 103         for (i = 0; i < MAX_IO_WIN; i++) {
 104                 if (s->io[i].NumPorts == 0) {
 105                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 106                         if (s->io[i].res) {
 107                                 s->io[i].Attributes = attr;
 108                                 s->io[i].BasePort = *base = s->io[i].res->start;
 109                                 s->io[i].NumPorts = s->io[i].InUse = num;
 110                                 break;
 111                         } else
 112                                 return 1;
 113                 } else if (s->io[i].Attributes != attr)
 114                         continue;
 115                 /* Try to extend top of window */
 116                 try = s->io[i].BasePort + s->io[i].NumPorts;
 117                 if ((*base == 0) || (*base == try))
 118                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 119                                                     s->io[i].res->end + num, s) == 0) {
 120                                 *base = try;
 121                                 s->io[i].NumPorts += num;
 122                                 s->io[i].InUse += num;
 123                                 break;
 124                         }
 125                 /* Try to extend bottom of window */
 126                 try = s->io[i].BasePort - num;
 127                 if ((*base == 0) || (*base == try))
 128                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 129                                                     s->io[i].res->end, s) == 0) {
 130                                 s->io[i].BasePort = *base = try;
 131                                 s->io[i].NumPorts += num;
 132                                 s->io[i].InUse += num;
 133                                 break;
 134                         }
 135         }
 136         return (i == MAX_IO_WIN);
 137 } /* alloc_io_space */
 138
 139
 140 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
 141                              ioaddr_t num)
 142 {
 143         int i;
 144
 145         for (i = 0; i < MAX_IO_WIN; i++) {
 146                 if ((s->io[i].BasePort <= base) &&
 147                     (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
 148                         s->io[i].InUse -= num;
 149                         /* Free the window if no one else is using it */
 150                         if (s->io[i].InUse == 0) {
 151                                 s->io[i].NumPorts = 0;
 152                                 release_resource(s->io[i].res);
 153                                 kfree(s->io[i].res);
 154                                 s->io[i].res = NULL;
 155                         }
 156                 }
 157         }
 158 } /* release_io_space */
 159
 160
 161 /** pccard_access_configuration_register
 162  *
 163  * Access_configuration_register() reads and writes configuration
 164  * registers in attribute memory.  Memory window 0 is reserved for
 165  * this and the tuple reading services.
 166  */
 167
 168 int pccard_access_configuration_register(struct pcmcia_socket *s,
 169                                          unsigned int function,
 170                                          conf_reg_t *reg)
 171 {
 172         config_t *c;
 173         int addr;
 174         u_char val;
 175
 176         if (!s || !s->config)
 177                 return CS_NO_CARD;
 178
 179         c = &s->config[function];
 180
 181         if (c == NULL)
 182                 return CS_NO_CARD;
 183
 184         if (!(c->state & CONFIG_LOCKED))
 185                 return CS_CONFIGURATION_LOCKED;
 186
 187         addr = (c->ConfigBase + reg->Offset) >> 1;
 188
 189         switch (reg->Action) {
 190         case CS_READ:
 191                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 192                 reg->Value = val;
 193                 break;
 194         case CS_WRITE:
 195                 val = reg->Value;
 196                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 197                 break;
 198         default:
 199                 return CS_BAD_ARGS;
 200                 break;
 201         }
 202         return CS_SUCCESS;
 203 } /* pccard_access_configuration_register */
 204
 205 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
 206                                          conf_reg_t *reg)
 207 {
 208         return pccard_access_configuration_register(p_dev->socket,
 209                                                     p_dev->func, reg);
 210 }
 211 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 212
 213
 214
 215 int pccard_get_configuration_info(struct pcmcia_socket *s,
 216                                   unsigned int function,
 217                                   config_info_t *config)
 218 {
 219         config_t *c;
 220
 221         if (!(s->state & SOCKET_PRESENT))
 222                 return CS_NO_CARD;
 223
 224         config->Function = function;
 225
 226 #ifdef CONFIG_CARDBUS
 227         if (s->state & SOCKET_CARDBUS) {
 228                 memset(config, 0, sizeof(config_info_t));
 229                 config->Vcc = s->socket.Vcc;
 230                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 231                 config->Option = s->cb_dev->subordinate->number;
 232                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 233                         config->Attributes = CONF_VALID_CLIENT;
 234                         config->IntType = INT_CARDBUS;
 235                         config->AssignedIRQ = s->irq.AssignedIRQ;
 236                         if (config->AssignedIRQ)
 237                                 config->Attributes |= CONF_ENABLE_IRQ;
 238                         config->BasePort1 = s->io[0].BasePort;
 239                         config->NumPorts1 = s->io[0].NumPorts;
 240                 }
 241                 return CS_SUCCESS;
 242         }
 243 #endif
 244
 245         c = (s->config != NULL) ? &s->config[function] : NULL;
 246
 247         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 248                 config->Attributes = 0;
 249                 config->Vcc = s->socket.Vcc;
 250                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 251                 return CS_SUCCESS;
 252         }
 253
 254         /* !!! This is a hack !!! */
 255         memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
 256         config->Attributes |= CONF_VALID_CLIENT;
 257         config->CardValues = c->CardValues;
 258         config->IRQAttributes = c->irq.Attributes;
 259         config->AssignedIRQ = s->irq.AssignedIRQ;
 260         config->BasePort1 = c->io.BasePort1;
 261         config->NumPorts1 = c->io.NumPorts1;
 262         config->Attributes1 = c->io.Attributes1;
 263         config->BasePort2 = c->io.BasePort2;
 264         config->NumPorts2 = c->io.NumPorts2;
 265         config->Attributes2 = c->io.Attributes2;
 266         config->IOAddrLines = c->io.IOAddrLines;
 267
 268         return CS_SUCCESS;
 269 } /* pccard_get_configuration_info */
 270
 271 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 272                                   config_info_t *config)
 273 {
 274         return pccard_get_configuration_info(p_dev->socket, p_dev->func,
 275                                              config);
 276 }
 277 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 278
 279
 280 /** pcmcia_get_window
 281  */
 282 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 283                       int idx, win_req_t *req)
 284 {
 285         window_t *win;
 286         int w;
 287
 288         if (!s || !(s->state & SOCKET_PRESENT))
 289                 return CS_NO_CARD;
 290         for (w = idx; w < MAX_WIN; w++)
 291                 if (s->state & SOCKET_WIN_REQ(w))
 292                         break;
 293         if (w == MAX_WIN)
 294                 return CS_NO_MORE_ITEMS;
 295         win = &s->win[w];
 296         req->Base = win->ctl.res->start;
 297         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 298         req->AccessSpeed = win->ctl.speed;
 299         req->Attributes = 0;
 300         if (win->ctl.flags & MAP_ATTRIB)
 301                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 302         if (win->ctl.flags & MAP_ACTIVE)
 303                 req->Attributes |= WIN_ENABLE;
 304         if (win->ctl.flags & MAP_16BIT)
 305                 req->Attributes |= WIN_DATA_WIDTH_16;
 306         if (win->ctl.flags & MAP_USE_WAIT)
 307                 req->Attributes |= WIN_USE_WAIT;
 308         *handle = win;
 309         return CS_SUCCESS;
 310 } /* pcmcia_get_window */
 311 EXPORT_SYMBOL(pcmcia_get_window);
 312
 313
 314 /** pccard_get_status
 315  *
 316  * Get the current socket state bits.  We don't support the latched
 317  * SocketState yet: I haven't seen any point for it.
 318  */
 319
 320 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
 321                       cs_status_t *status)
 322 {
 323         config_t *c;
 324         int val;
 325
 326         s->ops->get_status(s, &val);
 327         status->CardState = status->SocketState = 0;
 328         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 329         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 330         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 331         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 332         if (s->state & SOCKET_SUSPEND)
 333                 status->CardState |= CS_EVENT_PM_SUSPEND;
 334         if (!(s->state & SOCKET_PRESENT))
 335                 return CS_NO_CARD;
 336
 337         c = (s->config != NULL) ? &s->config[function] : NULL;
 338         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 339             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 340                 u_char reg;
 341                 if (c->CardValues & PRESENT_PIN_REPLACE) {
 342                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 343                         status->CardState |=
 344                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 345                         status->CardState |=
 346                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 347                         status->CardState |=
 348                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 349                         status->CardState |=
 350                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 351                 } else {
 352                         /* No PRR?  Then assume we're always ready */
 353                         status->CardState |= CS_EVENT_READY_CHANGE;
 354                 }
 355                 if (c->CardValues & PRESENT_EXT_STATUS) {
 356                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 357                         status->CardState |=
 358                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 359                 }
 360                 return CS_SUCCESS;
 361         }
 362         status->CardState |=
 363                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 364         status->CardState |=
 365                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 366         status->CardState |=
 367                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 368         status->CardState |=
 369                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 370         return CS_SUCCESS;
 371 } /* pccard_get_status */
 372
 373 int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
 374 {
 375         return pccard_get_status(handle->socket, handle->func, status);
 376 }
 377 EXPORT_SYMBOL(pcmcia_get_status);
 378
 379
 380
 381 /** pcmcia_get_mem_page
 382  *
 383  * Change the card address of an already open memory window.
 384  */
 385 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 386 {
 387         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 388                 return CS_BAD_HANDLE;
 389         req->Page = 0;
 390         req->CardOffset = win->ctl.card_start;
 391         return CS_SUCCESS;
 392 } /* pcmcia_get_mem_page */
 393 EXPORT_SYMBOL(pcmcia_get_mem_page);
 394
 395
 396 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 397 {
 398         struct pcmcia_socket *s;
 399         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 400                 return CS_BAD_HANDLE;
 401         if (req->Page != 0)
 402                 return CS_BAD_PAGE;
 403         s = win->sock;
 404         win->ctl.card_start = req->CardOffset;
 405         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 406                 return CS_BAD_OFFSET;
 407         return CS_SUCCESS;
 408 } /* pcmcia_map_mem_page */
 409 EXPORT_SYMBOL(pcmcia_map_mem_page);
 410
 411
 412 /** pcmcia_modify_configuration
 413  *
 414  * Modify a locked socket configuration
 415  */
 416 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 417                                 modconf_t *mod)
 418 {
 419         struct pcmcia_socket *s;
 420         config_t *c;
 421
 422         s = p_dev->socket;
 423         c = p_dev->function_config;
 424
 425         if (!(s->state & SOCKET_PRESENT))
 426                 return CS_NO_CARD;
 427         if (!(c->state & CONFIG_LOCKED))
 428                 return CS_CONFIGURATION_LOCKED;
 429
 430         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
 431                 if (mod->Attributes & CONF_ENABLE_IRQ) {
 432                         c->Attributes |= CONF_ENABLE_IRQ;
 433                         s->socket.io_irq = s->irq.AssignedIRQ;
 434                 } else {
 435                         c->Attributes &= ~CONF_ENABLE_IRQ;
 436                         s->socket.io_irq = 0;
 437                 }
 438                 s->ops->set_socket(s, &s->socket);
 439         }
 440
 441         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
 442                 return CS_BAD_VCC;
 443
 444         /* We only allow changing Vpp1 and Vpp2 to the same value */
 445         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
 446             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
 447                 if (mod->Vpp1 != mod->Vpp2)
 448                         return CS_BAD_VPP;
 449                 s->socket.Vpp = mod->Vpp1;
 450                 if (s->ops->set_socket(s, &s->socket))
 451                         return CS_BAD_VPP;
 452         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
 453                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
 454                 return CS_BAD_VPP;
 455
 456         return CS_SUCCESS;
 457 } /* modify_configuration */
 458 EXPORT_SYMBOL(pcmcia_modify_configuration);
 459
 460
 461 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
 462 {
 463         pccard_io_map io = { 0, 0, 0, 0, 1 };
 464         struct pcmcia_socket *s = p_dev->socket;
 465         int i;
 466
 467         if (!(p_dev->state & CLIENT_CONFIG_LOCKED))
 468                 return CS_BAD_HANDLE;
 469         p_dev->state &= ~CLIENT_CONFIG_LOCKED;
 470
 471         if (!(p_dev->state & CLIENT_STALE)) {
 472                 config_t *c = p_dev->function_config;
 473                 if (--(s->lock_count) == 0) {
 474                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
 475                         s->socket.Vpp = 0;
 476                         s->socket.io_irq = 0;
 477                         s->ops->set_socket(s, &s->socket);
 478                 }
 479                 if (c->state & CONFIG_IO_REQ)
 480                         for (i = 0; i < MAX_IO_WIN; i++) {
 481                                 if (s->io[i].NumPorts == 0)
 482                                         continue;
 483                                 s->io[i].Config--;
 484                                 if (s->io[i].Config != 0)
 485                                         continue;
 486                                 io.map = i;
 487                                 s->ops->set_io_map(s, &io);
 488                         }
 489                 c->state &= ~CONFIG_LOCKED;
 490         }
 491
 492         return CS_SUCCESS;
 493 } /* pcmcia_release_configuration */
 494 EXPORT_SYMBOL(pcmcia_release_configuration);
 495
 496
 497 /** pcmcia_release_io
 498  *
 499  * Release_io() releases the I/O ranges allocated by a client.  This
 500  * may be invoked some time after a card ejection has already dumped
 501  * the actual socket configuration, so if the client is "stale", we
 502  * don't bother checking the port ranges against the current socket
 503  * values.
 504  */
 505 int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
 506 {
 507         struct pcmcia_socket *s = p_dev->socket;
 508
 509         if (!(p_dev->state & CLIENT_IO_REQ))
 510                 return CS_BAD_HANDLE;
 511         p_dev->state &= ~CLIENT_IO_REQ;
 512
 513         if (!(p_dev->state & CLIENT_STALE)) {
 514                 config_t *c = p_dev->function_config;
 515                 if (c->state & CONFIG_LOCKED)
 516                         return CS_CONFIGURATION_LOCKED;
 517                 if ((c->io.BasePort1 != req->BasePort1) ||
 518                     (c->io.NumPorts1 != req->NumPorts1) ||
 519                     (c->io.BasePort2 != req->BasePort2) ||
 520                     (c->io.NumPorts2 != req->NumPorts2))
 521                         return CS_BAD_ARGS;
 522                 c->state &= ~CONFIG_IO_REQ;
 523         }
 524
 525         release_io_space(s, req->BasePort1, req->NumPorts1);
 526         if (req->NumPorts2)
 527                 release_io_space(s, req->BasePort2, req->NumPorts2);
 528
 529         return CS_SUCCESS;
 530 } /* pcmcia_release_io */
 531 EXPORT_SYMBOL(pcmcia_release_io);
 532
 533
 534 int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 535 {
 536         struct pcmcia_socket *s = p_dev->socket;
 537         if (!(p_dev->state & CLIENT_IRQ_REQ))
 538                 return CS_BAD_HANDLE;
 539         p_dev->state &= ~CLIENT_IRQ_REQ;
 540
 541         if (!(p_dev->state & CLIENT_STALE)) {
 542                 config_t *c= p_dev->function_config;
 543                 if (c->state & CONFIG_LOCKED)
 544                         return CS_CONFIGURATION_LOCKED;
 545                 if (c->irq.Attributes != req->Attributes)
 546                         return CS_BAD_ATTRIBUTE;
 547                 if (s->irq.AssignedIRQ != req->AssignedIRQ)
 548                         return CS_BAD_IRQ;
 549                 if (--s->irq.Config == 0) {
 550                         c->state &= ~CONFIG_IRQ_REQ;
 551                         s->irq.AssignedIRQ = 0;
 552                 }
 553         }
 554
 555         if (req->Attributes & IRQ_HANDLE_PRESENT) {
 556                 free_irq(req->AssignedIRQ, req->Instance);
 557         }
 558
 559 #ifdef CONFIG_PCMCIA_PROBE
 560         pcmcia_used_irq[req->AssignedIRQ]--;
 561 #endif
 562
 563         return CS_SUCCESS;
 564 } /* pcmcia_release_irq */
 565 EXPORT_SYMBOL(pcmcia_release_irq);
 566
 567
 568 int pcmcia_release_window(window_handle_t win)
 569 {
 570         struct pcmcia_socket *s;
 571
 572         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 573                 return CS_BAD_HANDLE;
 574         s = win->sock;
 575         if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
 576                 return CS_BAD_HANDLE;
 577
 578         /* Shut down memory window */
 579         win->ctl.flags &= ~MAP_ACTIVE;
 580         s->ops->set_mem_map(s, &win->ctl);
 581         s->state &= ~SOCKET_WIN_REQ(win->index);
 582
 583         /* Release system memory */
 584         if (win->ctl.res) {
 585                 release_resource(win->ctl.res);
 586                 kfree(win->ctl.res);
 587                 win->ctl.res = NULL;
 588         }
 589         win->handle->state &= ~CLIENT_WIN_REQ(win->index);
 590
 591         win->magic = 0;
 592
 593         return CS_SUCCESS;
 594 } /* pcmcia_release_window */
 595 EXPORT_SYMBOL(pcmcia_release_window);
 596
 597
 598 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
 599                                  config_req_t *req)
 600 {
 601         int i;
 602         u_int base;
 603         struct pcmcia_socket *s = p_dev->socket;
 604         config_t *c;
 605         pccard_io_map iomap;
 606
 607         if (!(s->state & SOCKET_PRESENT))
 608                 return CS_NO_CARD;
 609
 610         if (req->IntType & INT_CARDBUS)
 611                 return CS_UNSUPPORTED_MODE;
 612         c = p_dev->function_config;
 613         if (c->state & CONFIG_LOCKED)
 614                 return CS_CONFIGURATION_LOCKED;
 615
 616         /* Do power control.  We don't allow changes in Vcc. */
 617         if (s->socket.Vcc != req->Vcc)
 618                 return CS_BAD_VCC;
 619         if (req->Vpp1 != req->Vpp2)
 620                 return CS_BAD_VPP;
 621         s->socket.Vpp = req->Vpp1;
 622         if (s->ops->set_socket(s, &s->socket))
 623                 return CS_BAD_VPP;
 624
 625         /* Pick memory or I/O card, DMA mode, interrupt */
 626         c->IntType = req->IntType;
 627         c->Attributes = req->Attributes;
 628         if (req->IntType & INT_MEMORY_AND_IO)
 629                 s->socket.flags |= SS_IOCARD;
 630         if (req->IntType & INT_ZOOMED_VIDEO)
 631                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 632         if (req->Attributes & CONF_ENABLE_DMA)
 633                 s->socket.flags |= SS_DMA_MODE;
 634         if (req->Attributes & CONF_ENABLE_SPKR)
 635                 s->socket.flags |= SS_SPKR_ENA;
 636         if (req->Attributes & CONF_ENABLE_IRQ)
 637                 s->socket.io_irq = s->irq.AssignedIRQ;
 638         else
 639                 s->socket.io_irq = 0;
 640         s->ops->set_socket(s, &s->socket);
 641         s->lock_count++;
 642
 643         /* Set up CIS configuration registers */
 644         base = c->ConfigBase = req->ConfigBase;
 645         c->CardValues = req->Present;
 646         if (req->Present & PRESENT_COPY) {
 647                 c->Copy = req->Copy;
 648                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 649         }
 650         if (req->Present & PRESENT_OPTION) {
 651                 if (s->functions == 1) {
 652                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 653                 } else {
 654                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 655                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 656                         if (req->Present & PRESENT_IOBASE_0)
 657                                 c->Option |= COR_ADDR_DECODE;
 658                 }
 659                 if (c->state & CONFIG_IRQ_REQ)
 660                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 661                                 c->Option |= COR_LEVEL_REQ;
 662                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 663                 mdelay(40);
 664         }
 665         if (req->Present & PRESENT_STATUS) {
 666                 c->Status = req->Status;
 667                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 668         }
 669         if (req->Present & PRESENT_PIN_REPLACE) {
 670                 c->Pin = req->Pin;
 671                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 672         }
 673         if (req->Present & PRESENT_EXT_STATUS) {
 674                 c->ExtStatus = req->ExtStatus;
 675                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 676         }
 677         if (req->Present & PRESENT_IOBASE_0) {
 678                 u_char b = c->io.BasePort1 & 0xff;
 679                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 680                 b = (c->io.BasePort1 >> 8) & 0xff;
 681                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 682         }
 683         if (req->Present & PRESENT_IOSIZE) {
 684                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 685                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 686         }
 687
 688         /* Configure I/O windows */
 689         if (c->state & CONFIG_IO_REQ) {
 690                 iomap.speed = io_speed;
 691                 for (i = 0; i < MAX_IO_WIN; i++)
 692                         if (s->io[i].NumPorts != 0) {
 693                                 iomap.map = i;
 694                                 iomap.flags = MAP_ACTIVE;
 695                                 switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
 696                                 case IO_DATA_PATH_WIDTH_16:
 697                                         iomap.flags |= MAP_16BIT; break;
 698                                 case IO_DATA_PATH_WIDTH_AUTO:
 699                                         iomap.flags |= MAP_AUTOSZ; break;
 700                                 default:
 701                                         break;
 702                                 }
 703                                 iomap.start = s->io[i].BasePort;
 704                                 iomap.stop = iomap.start + s->io[i].NumPorts - 1;
 705                                 s->ops->set_io_map(s, &iomap);
 706                                 s->io[i].Config++;
 707                         }
 708         }
 709
 710         c->state |= CONFIG_LOCKED;
 711         p_dev->state |= CLIENT_CONFIG_LOCKED;
 712         return CS_SUCCESS;
 713 } /* pcmcia_request_configuration */
 714 EXPORT_SYMBOL(pcmcia_request_configuration);
 715
 716
 717 /** pcmcia_request_io
 718  *
 719  * Request_io() reserves ranges of port addresses for a socket.
 720  * I have not implemented range sharing or alias addressing.
 721  */
 722 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 723 {
 724         struct pcmcia_socket *s = p_dev->socket;
 725         config_t *c;
 726
 727         if (!(s->state & SOCKET_PRESENT))
 728                 return CS_NO_CARD;
 729
 730         if (!req)
 731                 return CS_UNSUPPORTED_MODE;
 732         c = p_dev->function_config;
 733         if (c->state & CONFIG_LOCKED)
 734                 return CS_CONFIGURATION_LOCKED;
 735         if (c->state & CONFIG_IO_REQ)
 736                 return CS_IN_USE;
 737         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 738                 return CS_BAD_ATTRIBUTE;
 739         if ((req->NumPorts2 > 0) &&
 740             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 741                 return CS_BAD_ATTRIBUTE;
 742
 743         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 744                            req->NumPorts1, req->IOAddrLines))
 745                 return CS_IN_USE;
 746
 747         if (req->NumPorts2) {
 748                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 749                                    req->NumPorts2, req->IOAddrLines)) {
 750                         release_io_space(s, req->BasePort1, req->NumPorts1);
 751                         return CS_IN_USE;
 752                 }
 753         }
 754
 755         c->io = *req;
 756         c->state |= CONFIG_IO_REQ;
 757         p_dev->state |= CLIENT_IO_REQ;
 758         return CS_SUCCESS;
 759 } /* pcmcia_request_io */
 760 EXPORT_SYMBOL(pcmcia_request_io);
 761
 762
 763 /** pcmcia_request_irq
 764  *
 765  * Request_irq() reserves an irq for this client.
 766  *
 767  * Also, since Linux only reserves irq's when they are actually
 768  * hooked, we don't guarantee that an irq will still be available
 769  * when the configuration is locked.  Now that I think about it,
 770  * there might be a way to fix this using a dummy handler.
 771  */
 772
 773 #ifdef CONFIG_PCMCIA_PROBE
 774 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
 775 {
 776         return IRQ_NONE;
 777 }
 778 #endif
 779
 780 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 781 {
 782         struct pcmcia_socket *s = p_dev->socket;
 783         config_t *c;
 784         int ret = CS_IN_USE, irq = 0;
 785
 786         if (!(s->state & SOCKET_PRESENT))
 787                 return CS_NO_CARD;
 788         c = p_dev->function_config;
 789         if (c->state & CONFIG_LOCKED)
 790                 return CS_CONFIGURATION_LOCKED;
 791         if (c->state & CONFIG_IRQ_REQ)
 792                 return CS_IN_USE;
 793
 794 #ifdef CONFIG_PCMCIA_PROBE
 795         if (s->irq.AssignedIRQ != 0) {
 796                 /* If the interrupt is already assigned, it must be the same */
 797                 irq = s->irq.AssignedIRQ;
 798         } else {
 799                 int try;
 800                 u32 mask = s->irq_mask;
 801                 void *data = &p_dev->dev.driver; /* something unique to this device */
 802
 803                 for (try = 0; try < 64; try++) {
 804                         irq = try % 32;
 805
 806                         /* marked as available by driver, and not blocked by userspace? */
 807                         if (!((mask >> irq) & 1))
 808                                 continue;
 809
 810                         /* avoid an IRQ which is already used by a PCMCIA card */
 811                         if ((try < 32) && pcmcia_used_irq[irq])
 812                                 continue;
 813
 814                         /* register the correct driver, if possible, of check whether
 815                          * registering a dummy handle works, i.e. if the IRQ isn't
 816                          * marked as used by the kernel resource management core */
 817                         ret = request_irq(irq,
 818                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 819                                           ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 820                                            (s->functions > 1) ||
 821                                            (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 822                                           p_dev->devname,
 823                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 824                         if (!ret) {
 825                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 826                                         free_irq(irq, data);
 827                                 break;
 828                         }
 829                 }
 830         }
 831 #endif
 832         /* only assign PCI irq if no IRQ already assigned */
 833         if (ret && !s->irq.AssignedIRQ) {
 834                 if (!s->pci_irq)
 835                         return ret;
 836                 irq = s->pci_irq;
 837         }
 838
 839         if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
 840                 if (request_irq(irq, req->Handler,
 841                                 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 842                                  (s->functions > 1) ||
 843                                  (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 844                                 p_dev->devname, req->Instance))
 845                         return CS_IN_USE;
 846         }
 847
 848         c->irq.Attributes = req->Attributes;
 849         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 850         s->irq.Config++;
 851
 852         c->state |= CONFIG_IRQ_REQ;
 853         p_dev->state |= CLIENT_IRQ_REQ;
 854
 855 #ifdef CONFIG_PCMCIA_PROBE
 856         pcmcia_used_irq[irq]++;
 857 #endif
 858
 859         return CS_SUCCESS;
 860 } /* pcmcia_request_irq */
 861 EXPORT_SYMBOL(pcmcia_request_irq);
 862
 863
 864 /** pcmcia_request_window
 865  *
 866  * Request_window() establishes a mapping between card memory space
 867  * and system memory space.
 868  */
 869 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 870 {
 871         struct pcmcia_socket *s = (*p_dev)->socket;
 872         window_t *win;
 873         u_long align;
 874         int w;
 875
 876         if (!(s->state & SOCKET_PRESENT))
 877                 return CS_NO_CARD;
 878         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 879                 return CS_BAD_ATTRIBUTE;
 880
 881         /* Window size defaults to smallest available */
 882         if (req->Size == 0)
 883                 req->Size = s->map_size;
 884         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 885                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 886                  req->Size : s->map_size);
 887         if (req->Size & (s->map_size-1))
 888                 return CS_BAD_SIZE;
 889         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 890             (req->Base & (align-1)))
 891                 return CS_BAD_BASE;
 892         if (req->Base)
 893                 align = 0;
 894
 895         /* Allocate system memory window */
 896         for (w = 0; w < MAX_WIN; w++)
 897                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 898         if (w == MAX_WIN)
 899                 return CS_OUT_OF_RESOURCE;
 900
 901         win = &s->win[w];
 902         win->magic = WINDOW_MAGIC;
 903         win->index = w;
 904         win->handle = *p_dev;
 905         win->sock = s;
 906
 907         if (!(s->features & SS_CAP_STATIC_MAP)) {
 908                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 909                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 910                 if (!win->ctl.res)
 911                         return CS_IN_USE;
 912         }
 913         (*p_dev)->state |= CLIENT_WIN_REQ(w);
 914
 915         /* Configure the socket controller */
 916         win->ctl.map = w+1;
 917         win->ctl.flags = 0;
 918         win->ctl.speed = req->AccessSpeed;
 919         if (req->Attributes & WIN_MEMORY_TYPE)
 920                 win->ctl.flags |= MAP_ATTRIB;
 921         if (req->Attributes & WIN_ENABLE)
 922                 win->ctl.flags |= MAP_ACTIVE;
 923         if (req->Attributes & WIN_DATA_WIDTH_16)
 924                 win->ctl.flags |= MAP_16BIT;
 925         if (req->Attributes & WIN_USE_WAIT)
 926                 win->ctl.flags |= MAP_USE_WAIT;
 927         win->ctl.card_start = 0;
 928         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 929                 return CS_BAD_ARGS;
 930         s->state |= SOCKET_WIN_REQ(w);
 931
 932         /* Return window handle */
 933         if (s->features & SS_CAP_STATIC_MAP) {
 934                 req->Base = win->ctl.static_start;
 935         } else {
 936                 req->Base = win->ctl.res->start;
 937         }
 938         *wh = win;
 939
 940         return CS_SUCCESS;
 941 } /* pcmcia_request_window */
 942 EXPORT_SYMBOL(pcmcia_request_window);