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 /* 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                 s->io[0].Attributes = attr;
  92                 return 0;
  93         }
  94         /* Check for an already-allocated window that must conflict with
  95          * what was asked for.  It is a hack because it does not catch all
  96          * potential conflicts, just the most obvious ones.
  97          */
  98         for (i = 0; i < MAX_IO_WIN; i++)
  99                 if ((s->io[i].NumPorts != 0) &&
 100                     ((s->io[i].BasePort & (align-1)) == *base))
 101                         return 1;
 102         for (i = 0; i < MAX_IO_WIN; i++) {
 103                 if (s->io[i].NumPorts == 0) {
 104                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
 105                         if (s->io[i].res) {
 106                                 s->io[i].Attributes = attr;
 107                                 s->io[i].BasePort = *base = s->io[i].res->start;
 108                                 s->io[i].NumPorts = s->io[i].InUse = num;
 109                                 break;
 110                         } else
 111                                 return 1;
 112                 } else if (s->io[i].Attributes != attr)
 113                         continue;
 114                 /* Try to extend top of window */
 115                 try = s->io[i].BasePort + s->io[i].NumPorts;
 116                 if ((*base == 0) || (*base == try))
 117                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
 118                                                     s->io[i].res->end + num, s) == 0) {
 119                                 *base = try;
 120                                 s->io[i].NumPorts += num;
 121                                 s->io[i].InUse += num;
 122                                 break;
 123                         }
 124                 /* Try to extend bottom of window */
 125                 try = s->io[i].BasePort - num;
 126                 if ((*base == 0) || (*base == try))
 127                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
 128                                                     s->io[i].res->end, s) == 0) {
 129                                 s->io[i].BasePort = *base = try;
 130                                 s->io[i].NumPorts += num;
 131                                 s->io[i].InUse += num;
 132                                 break;
 133                         }
 134         }
 135         return (i == MAX_IO_WIN);
 136 } /* alloc_io_space */
 137
 138
 139 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
 140                              ioaddr_t num)
 141 {
 142         int i;
 143
 144         for (i = 0; i < MAX_IO_WIN; i++) {
 145                 if ((s->io[i].BasePort <= base) &&
 146                     (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
 147                         s->io[i].InUse -= num;
 148                         /* Free the window if no one else is using it */
 149                         if (s->io[i].InUse == 0) {
 150                                 s->io[i].NumPorts = 0;
 151                                 release_resource(s->io[i].res);
 152                                 kfree(s->io[i].res);
 153                                 s->io[i].res = NULL;
 154                         }
 155                 }
 156         }
 157 } /* release_io_space */
 158
 159
 160 /** pccard_access_configuration_register
 161  *
 162  * Access_configuration_register() reads and writes configuration
 163  * registers in attribute memory.  Memory window 0 is reserved for
 164  * this and the tuple reading services.
 165  */
 166
 167 int pccard_access_configuration_register(struct pcmcia_socket *s,
 168                                          unsigned int function,
 169                                          conf_reg_t *reg)
 170 {
 171         config_t *c;
 172         int addr;
 173         u_char val;
 174
 175         if (!s || !s->config)
 176                 return CS_NO_CARD;
 177
 178         c = &s->config[function];
 179
 180         if (c == NULL)
 181                 return CS_NO_CARD;
 182
 183         if (!(c->state & CONFIG_LOCKED))
 184                 return CS_CONFIGURATION_LOCKED;
 185
 186         addr = (c->ConfigBase + reg->Offset) >> 1;
 187
 188         switch (reg->Action) {
 189         case CS_READ:
 190                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
 191                 reg->Value = val;
 192                 break;
 193         case CS_WRITE:
 194                 val = reg->Value;
 195                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
 196                 break;
 197         default:
 198                 return CS_BAD_ARGS;
 199                 break;
 200         }
 201         return CS_SUCCESS;
 202 } /* pccard_access_configuration_register */
 203
 204 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
 205                                          conf_reg_t *reg)
 206 {
 207         return pccard_access_configuration_register(p_dev->socket,
 208                                                     p_dev->func, reg);
 209 }
 210 EXPORT_SYMBOL(pcmcia_access_configuration_register);
 211
 212
 213
 214 int pccard_get_configuration_info(struct pcmcia_socket *s,
 215                                   unsigned int function,
 216                                   config_info_t *config)
 217 {
 218         config_t *c;
 219
 220         if (!(s->state & SOCKET_PRESENT))
 221                 return CS_NO_CARD;
 222
 223         config->Function = function;
 224
 225 #ifdef CONFIG_CARDBUS
 226         if (s->state & SOCKET_CARDBUS) {
 227                 memset(config, 0, sizeof(config_info_t));
 228                 config->Vcc = s->socket.Vcc;
 229                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 230                 config->Option = s->cb_dev->subordinate->number;
 231                 if (s->state & SOCKET_CARDBUS_CONFIG) {
 232                         config->Attributes = CONF_VALID_CLIENT;
 233                         config->IntType = INT_CARDBUS;
 234                         config->AssignedIRQ = s->irq.AssignedIRQ;
 235                         if (config->AssignedIRQ)
 236                                 config->Attributes |= CONF_ENABLE_IRQ;
 237                         config->BasePort1 = s->io[0].BasePort;
 238                         config->NumPorts1 = s->io[0].NumPorts;
 239                 }
 240                 return CS_SUCCESS;
 241         }
 242 #endif
 243
 244         c = (s->config != NULL) ? &s->config[function] : NULL;
 245
 246         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
 247                 config->Attributes = 0;
 248                 config->Vcc = s->socket.Vcc;
 249                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
 250                 return CS_SUCCESS;
 251         }
 252
 253         /* !!! This is a hack !!! */
 254         memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
 255         config->Attributes |= CONF_VALID_CLIENT;
 256         config->CardValues = c->CardValues;
 257         config->IRQAttributes = c->irq.Attributes;
 258         config->AssignedIRQ = s->irq.AssignedIRQ;
 259         config->BasePort1 = c->io.BasePort1;
 260         config->NumPorts1 = c->io.NumPorts1;
 261         config->Attributes1 = c->io.Attributes1;
 262         config->BasePort2 = c->io.BasePort2;
 263         config->NumPorts2 = c->io.NumPorts2;
 264         config->Attributes2 = c->io.Attributes2;
 265         config->IOAddrLines = c->io.IOAddrLines;
 266
 267         return CS_SUCCESS;
 268 } /* pccard_get_configuration_info */
 269
 270 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
 271                                   config_info_t *config)
 272 {
 273         return pccard_get_configuration_info(p_dev->socket, p_dev->func,
 274                                              config);
 275 }
 276 EXPORT_SYMBOL(pcmcia_get_configuration_info);
 277
 278
 279 /** pcmcia_get_window
 280  */
 281 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
 282                       int idx, win_req_t *req)
 283 {
 284         window_t *win;
 285         int w;
 286
 287         if (!s || !(s->state & SOCKET_PRESENT))
 288                 return CS_NO_CARD;
 289         for (w = idx; w < MAX_WIN; w++)
 290                 if (s->state & SOCKET_WIN_REQ(w))
 291                         break;
 292         if (w == MAX_WIN)
 293                 return CS_NO_MORE_ITEMS;
 294         win = &s->win[w];
 295         req->Base = win->ctl.res->start;
 296         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
 297         req->AccessSpeed = win->ctl.speed;
 298         req->Attributes = 0;
 299         if (win->ctl.flags & MAP_ATTRIB)
 300                 req->Attributes |= WIN_MEMORY_TYPE_AM;
 301         if (win->ctl.flags & MAP_ACTIVE)
 302                 req->Attributes |= WIN_ENABLE;
 303         if (win->ctl.flags & MAP_16BIT)
 304                 req->Attributes |= WIN_DATA_WIDTH_16;
 305         if (win->ctl.flags & MAP_USE_WAIT)
 306                 req->Attributes |= WIN_USE_WAIT;
 307         *handle = win;
 308         return CS_SUCCESS;
 309 } /* pcmcia_get_window */
 310 EXPORT_SYMBOL(pcmcia_get_window);
 311
 312
 313 /** pccard_get_status
 314  *
 315  * Get the current socket state bits.  We don't support the latched
 316  * SocketState yet: I haven't seen any point for it.
 317  */
 318
 319 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
 320                       cs_status_t *status)
 321 {
 322         config_t *c;
 323         int val;
 324
 325         s->ops->get_status(s, &val);
 326         status->CardState = status->SocketState = 0;
 327         status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
 328         status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
 329         status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
 330         status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
 331         if (s->state & SOCKET_SUSPEND)
 332                 status->CardState |= CS_EVENT_PM_SUSPEND;
 333         if (!(s->state & SOCKET_PRESENT))
 334                 return CS_NO_CARD;
 335
 336         c = (s->config != NULL) ? &s->config[function] : NULL;
 337         if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
 338             (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
 339                 u_char reg;
 340                 if (c->Present & PRESENT_PIN_REPLACE) {
 341                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
 342                         status->CardState |=
 343                                 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
 344                         status->CardState |=
 345                                 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
 346                         status->CardState |=
 347                                 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
 348                         status->CardState |=
 349                                 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
 350                 } else {
 351                         /* No PRR?  Then assume we're always ready */
 352                         status->CardState |= CS_EVENT_READY_CHANGE;
 353                 }
 354                 if (c->Present & PRESENT_EXT_STATUS) {
 355                         pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
 356                         status->CardState |=
 357                                 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
 358                 }
 359                 return CS_SUCCESS;
 360         }
 361         status->CardState |=
 362                 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
 363         status->CardState |=
 364                 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
 365         status->CardState |=
 366                 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
 367         status->CardState |=
 368                 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
 369         return CS_SUCCESS;
 370 } /* pccard_get_status */
 371
 372 int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
 373 {
 374         struct pcmcia_socket *s;
 375         s = SOCKET(handle);
 376         return pccard_get_status(s, handle->func, status);
 377 }
 378 EXPORT_SYMBOL(pcmcia_get_status);
 379
 380
 381
 382 /** pcmcia_get_mem_page
 383  *
 384  * Change the card address of an already open memory window.
 385  */
 386 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
 387 {
 388         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 389                 return CS_BAD_HANDLE;
 390         req->Page = 0;
 391         req->CardOffset = win->ctl.card_start;
 392         return CS_SUCCESS;
 393 } /* pcmcia_get_mem_page */
 394 EXPORT_SYMBOL(pcmcia_get_mem_page);
 395
 396
 397 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
 398 {
 399         struct pcmcia_socket *s;
 400         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
 401                 return CS_BAD_HANDLE;
 402         if (req->Page != 0)
 403                 return CS_BAD_PAGE;
 404         s = win->sock;
 405         win->ctl.card_start = req->CardOffset;
 406         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 407                 return CS_BAD_OFFSET;
 408         return CS_SUCCESS;
 409 } /* pcmcia_map_mem_page */
 410 EXPORT_SYMBOL(pcmcia_map_mem_page);
 411
 412
 413 /** pcmcia_modify_configuration
 414  *
 415  * Modify a locked socket configuration
 416  */
 417 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
 418                                 modconf_t *mod)
 419 {
 420         struct pcmcia_socket *s;
 421         config_t *c;
 422
 423         s = p_dev->socket;
 424         c = CONFIG(p_dev);
 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                 c->Vpp1 = c->Vpp2 = 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 = CONFIG(p_dev);
 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 = CONFIG(p_dev);
 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 = CONFIG(p_dev);
 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 = CONFIG(p_dev);
 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         c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
 626
 627         /* Pick memory or I/O card, DMA mode, interrupt */
 628         c->IntType = req->IntType;
 629         c->Attributes = req->Attributes;
 630         if (req->IntType & INT_MEMORY_AND_IO)
 631                 s->socket.flags |= SS_IOCARD;
 632         if (req->IntType & INT_ZOOMED_VIDEO)
 633                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
 634         if (req->Attributes & CONF_ENABLE_DMA)
 635                 s->socket.flags |= SS_DMA_MODE;
 636         if (req->Attributes & CONF_ENABLE_SPKR)
 637                 s->socket.flags |= SS_SPKR_ENA;
 638         if (req->Attributes & CONF_ENABLE_IRQ)
 639                 s->socket.io_irq = s->irq.AssignedIRQ;
 640         else
 641                 s->socket.io_irq = 0;
 642         s->ops->set_socket(s, &s->socket);
 643         s->lock_count++;
 644
 645         /* Set up CIS configuration registers */
 646         base = c->ConfigBase = req->ConfigBase;
 647         c->Present = c->CardValues = req->Present;
 648         if (req->Present & PRESENT_COPY) {
 649                 c->Copy = req->Copy;
 650                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
 651         }
 652         if (req->Present & PRESENT_OPTION) {
 653                 if (s->functions == 1) {
 654                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
 655                 } else {
 656                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
 657                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
 658                         if (req->Present & PRESENT_IOBASE_0)
 659                                 c->Option |= COR_ADDR_DECODE;
 660                 }
 661                 if (c->state & CONFIG_IRQ_REQ)
 662                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
 663                                 c->Option |= COR_LEVEL_REQ;
 664                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
 665                 mdelay(40);
 666         }
 667         if (req->Present & PRESENT_STATUS) {
 668                 c->Status = req->Status;
 669                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
 670         }
 671         if (req->Present & PRESENT_PIN_REPLACE) {
 672                 c->Pin = req->Pin;
 673                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
 674         }
 675         if (req->Present & PRESENT_EXT_STATUS) {
 676                 c->ExtStatus = req->ExtStatus;
 677                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
 678         }
 679         if (req->Present & PRESENT_IOBASE_0) {
 680                 u_char b = c->io.BasePort1 & 0xff;
 681                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
 682                 b = (c->io.BasePort1 >> 8) & 0xff;
 683                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
 684         }
 685         if (req->Present & PRESENT_IOSIZE) {
 686                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
 687                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
 688         }
 689
 690         /* Configure I/O windows */
 691         if (c->state & CONFIG_IO_REQ) {
 692                 iomap.speed = io_speed;
 693                 for (i = 0; i < MAX_IO_WIN; i++)
 694                         if (s->io[i].NumPorts != 0) {
 695                                 iomap.map = i;
 696                                 iomap.flags = MAP_ACTIVE;
 697                                 switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
 698                                 case IO_DATA_PATH_WIDTH_16:
 699                                         iomap.flags |= MAP_16BIT; break;
 700                                 case IO_DATA_PATH_WIDTH_AUTO:
 701                                         iomap.flags |= MAP_AUTOSZ; break;
 702                                 default:
 703                                         break;
 704                                 }
 705                                 iomap.start = s->io[i].BasePort;
 706                                 iomap.stop = iomap.start + s->io[i].NumPorts - 1;
 707                                 s->ops->set_io_map(s, &iomap);
 708                                 s->io[i].Config++;
 709                         }
 710         }
 711
 712         c->state |= CONFIG_LOCKED;
 713         p_dev->state |= CLIENT_CONFIG_LOCKED;
 714         return CS_SUCCESS;
 715 } /* pcmcia_request_configuration */
 716 EXPORT_SYMBOL(pcmcia_request_configuration);
 717
 718
 719 /** pcmcia_request_io
 720  *
 721  * Request_io() reserves ranges of port addresses for a socket.
 722  * I have not implemented range sharing or alias addressing.
 723  */
 724 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
 725 {
 726         struct pcmcia_socket *s = p_dev->socket;
 727         config_t *c;
 728
 729         if (!(s->state & SOCKET_PRESENT))
 730                 return CS_NO_CARD;
 731
 732         if (!req)
 733                 return CS_UNSUPPORTED_MODE;
 734         c = CONFIG(p_dev);
 735         if (c->state & CONFIG_LOCKED)
 736                 return CS_CONFIGURATION_LOCKED;
 737         if (c->state & CONFIG_IO_REQ)
 738                 return CS_IN_USE;
 739         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
 740                 return CS_BAD_ATTRIBUTE;
 741         if ((req->NumPorts2 > 0) &&
 742             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
 743                 return CS_BAD_ATTRIBUTE;
 744
 745         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
 746                            req->NumPorts1, req->IOAddrLines))
 747                 return CS_IN_USE;
 748
 749         if (req->NumPorts2) {
 750                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
 751                                    req->NumPorts2, req->IOAddrLines)) {
 752                         release_io_space(s, req->BasePort1, req->NumPorts1);
 753                         return CS_IN_USE;
 754                 }
 755         }
 756
 757         c->io = *req;
 758         c->state |= CONFIG_IO_REQ;
 759         p_dev->state |= CLIENT_IO_REQ;
 760         return CS_SUCCESS;
 761 } /* pcmcia_request_io */
 762 EXPORT_SYMBOL(pcmcia_request_io);
 763
 764
 765 /** pcmcia_request_irq
 766  *
 767  * Request_irq() reserves an irq for this client.
 768  *
 769  * Also, since Linux only reserves irq's when they are actually
 770  * hooked, we don't guarantee that an irq will still be available
 771  * when the configuration is locked.  Now that I think about it,
 772  * there might be a way to fix this using a dummy handler.
 773  */
 774
 775 #ifdef CONFIG_PCMCIA_PROBE
 776 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
 777 {
 778         return IRQ_NONE;
 779 }
 780 #endif
 781
 782 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 783 {
 784         struct pcmcia_socket *s = p_dev->socket;
 785         config_t *c;
 786         int ret = CS_IN_USE, irq = 0;
 787
 788         if (!(s->state & SOCKET_PRESENT))
 789                 return CS_NO_CARD;
 790         c = CONFIG(p_dev);
 791         if (c->state & CONFIG_LOCKED)
 792                 return CS_CONFIGURATION_LOCKED;
 793         if (c->state & CONFIG_IRQ_REQ)
 794                 return CS_IN_USE;
 795
 796 #ifdef CONFIG_PCMCIA_PROBE
 797         if (s->irq.AssignedIRQ != 0) {
 798                 /* If the interrupt is already assigned, it must be the same */
 799                 irq = s->irq.AssignedIRQ;
 800         } else {
 801                 int try;
 802                 u32 mask = s->irq_mask;
 803                 void *data = &p_dev->dev.driver; /* something unique to this device */
 804
 805                 for (try = 0; try < 64; try++) {
 806                         irq = try % 32;
 807
 808                         /* marked as available by driver, and not blocked by userspace? */
 809                         if (!((mask >> irq) & 1))
 810                                 continue;
 811
 812                         /* avoid an IRQ which is already used by a PCMCIA card */
 813                         if ((try < 32) && pcmcia_used_irq[irq])
 814                                 continue;
 815
 816                         /* register the correct driver, if possible, of check whether
 817                          * registering a dummy handle works, i.e. if the IRQ isn't
 818                          * marked as used by the kernel resource management core */
 819                         ret = request_irq(irq,
 820                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
 821                                           ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 822                                            (s->functions > 1) ||
 823                                            (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 824                                           p_dev->dev.bus_id,
 825                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
 826                         if (!ret) {
 827                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
 828                                         free_irq(irq, data);
 829                                 break;
 830                         }
 831                 }
 832         }
 833 #endif
 834         if (ret) {
 835                 if (!s->pci_irq)
 836                         return ret;
 837                 irq = s->pci_irq;
 838         }
 839
 840         if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
 841                 if (request_irq(irq, req->Handler,
 842                                 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
 843                                  (s->functions > 1) ||
 844                                  (irq == s->pci_irq)) ? SA_SHIRQ : 0,
 845                                 p_dev->dev.bus_id, req->Instance))
 846                         return CS_IN_USE;
 847         }
 848
 849         c->irq.Attributes = req->Attributes;
 850         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
 851         s->irq.Config++;
 852
 853         c->state |= CONFIG_IRQ_REQ;
 854         p_dev->state |= CLIENT_IRQ_REQ;
 855
 856 #ifdef CONFIG_PCMCIA_PROBE
 857         pcmcia_used_irq[irq]++;
 858 #endif
 859
 860         return CS_SUCCESS;
 861 } /* pcmcia_request_irq */
 862 EXPORT_SYMBOL(pcmcia_request_irq);
 863
 864
 865 /** pcmcia_request_window
 866  *
 867  * Request_window() establishes a mapping between card memory space
 868  * and system memory space.
 869  */
 870 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
 871 {
 872         struct pcmcia_socket *s = (*p_dev)->socket;
 873         window_t *win;
 874         u_long align;
 875         int w;
 876
 877         if (!(s->state & SOCKET_PRESENT))
 878                 return CS_NO_CARD;
 879         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
 880                 return CS_BAD_ATTRIBUTE;
 881
 882         /* Window size defaults to smallest available */
 883         if (req->Size == 0)
 884                 req->Size = s->map_size;
 885         align = (((s->features & SS_CAP_MEM_ALIGN) ||
 886                   (req->Attributes & WIN_STRICT_ALIGN)) ?
 887                  req->Size : s->map_size);
 888         if (req->Size & (s->map_size-1))
 889                 return CS_BAD_SIZE;
 890         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
 891             (req->Base & (align-1)))
 892                 return CS_BAD_BASE;
 893         if (req->Base)
 894                 align = 0;
 895
 896         /* Allocate system memory window */
 897         for (w = 0; w < MAX_WIN; w++)
 898                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
 899         if (w == MAX_WIN)
 900                 return CS_OUT_OF_RESOURCE;
 901
 902         win = &s->win[w];
 903         win->magic = WINDOW_MAGIC;
 904         win->index = w;
 905         win->handle = *p_dev;
 906         win->sock = s;
 907
 908         if (!(s->features & SS_CAP_STATIC_MAP)) {
 909                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
 910                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
 911                 if (!win->ctl.res)
 912                         return CS_IN_USE;
 913         }
 914         (*p_dev)->state |= CLIENT_WIN_REQ(w);
 915
 916         /* Configure the socket controller */
 917         win->ctl.map = w+1;
 918         win->ctl.flags = 0;
 919         win->ctl.speed = req->AccessSpeed;
 920         if (req->Attributes & WIN_MEMORY_TYPE)
 921                 win->ctl.flags |= MAP_ATTRIB;
 922         if (req->Attributes & WIN_ENABLE)
 923                 win->ctl.flags |= MAP_ACTIVE;
 924         if (req->Attributes & WIN_DATA_WIDTH_16)
 925                 win->ctl.flags |= MAP_16BIT;
 926         if (req->Attributes & WIN_USE_WAIT)
 927                 win->ctl.flags |= MAP_USE_WAIT;
 928         win->ctl.card_start = 0;
 929         if (s->ops->set_mem_map(s, &win->ctl) != 0)
 930                 return CS_BAD_ARGS;
 931         s->state |= SOCKET_WIN_REQ(w);
 932
 933         /* Return window handle */
 934         if (s->features & SS_CAP_STATIC_MAP) {
 935                 req->Base = win->ctl.static_start;
 936         } else {
 937                 req->Base = win->ctl.res->start;
 938         }
 939         *wh = win;
 940
 941         return CS_SUCCESS;
 942 } /* pcmcia_request_window */
 943 EXPORT_SYMBOL(pcmcia_request_window);