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