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