pcmcia: pcmcia_config_loop() improvement by passing vcc
[linux-2.6.git] / 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 #include <pcmcia/cs_types.h>
25 #include <pcmcia/ss.h>
26 #include <pcmcia/cs.h>
27 #include <pcmcia/cistpl.h>
28 #include <pcmcia/cisreg.h>
29 #include <pcmcia/ds.h>
30
31 #include "cs_internal.h"
32 #include "ds_internal.h"
33
34
35 /* Access speed for IO windows */
36 static int io_speed = 0;
37 module_param(io_speed, int, 0444);
38
39
40 #ifdef CONFIG_PCMCIA_PROBE
41 #include <asm/irq.h>
42 /* mask of IRQs already reserved by other cards, we should avoid using them */
43 static u8 pcmcia_used_irq[NR_IRQS];
44 #endif
45
46
47 #ifdef DEBUG
48 extern int ds_pc_debug;
49
50 #define ds_dbg(skt, lvl, fmt, arg...) do {                      \
51         if (ds_pc_debug >= lvl)                                 \
52                 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,  \
53                         cs_socket_name(skt) , ## arg);          \
54 } while (0)
55 #else
56 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
57 #endif
58
59
60
61 /** alloc_io_space
62  *
63  * Special stuff for managing IO windows, because they are scarce
64  */
65
66 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
67                           unsigned int *base, unsigned int num, u_int lines)
68 {
69         int i;
70         unsigned int try, align;
71
72         align = (*base) ? (lines ? 1<<lines : 0) : 1;
73         if (align && (align < num)) {
74                 if (*base) {
75                         ds_dbg(s, 0, "odd IO request: num %#x align %#x\n",
76                                num, align);
77                         align = 0;
78                 } else
79                         while (align && (align < num)) align <<= 1;
80         }
81         if (*base & ~(align-1)) {
82                 ds_dbg(s, 0, "odd IO request: base %#x align %#x\n",
83                        *base, align);
84                 align = 0;
85         }
86         if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
87                 *base = s->io_offset | (*base & 0x0fff);
88                 return 0;
89         }
90         /* Check for an already-allocated window that must conflict with
91          * what was asked for.  It is a hack because it does not catch all
92          * potential conflicts, just the most obvious ones.
93          */
94         for (i = 0; i < MAX_IO_WIN; i++)
95                 if ((s->io[i].res) && *base &&
96                     ((s->io[i].res->start & (align-1)) == *base))
97                         return 1;
98         for (i = 0; i < MAX_IO_WIN; i++) {
99                 if (!s->io[i].res) {
100                         s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
101                         if (s->io[i].res) {
102                                 *base = s->io[i].res->start;
103                                 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
104                                 s->io[i].InUse = num;
105                                 break;
106                         } else
107                                 return 1;
108                 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
109                         continue;
110                 /* Try to extend top of window */
111                 try = s->io[i].res->end + 1;
112                 if ((*base == 0) || (*base == try))
113                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
114                                                     s->io[i].res->end + num, s) == 0) {
115                                 *base = try;
116                                 s->io[i].InUse += num;
117                                 break;
118                         }
119                 /* Try to extend bottom of window */
120                 try = s->io[i].res->start - num;
121                 if ((*base == 0) || (*base == try))
122                         if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
123                                                     s->io[i].res->end, s) == 0) {
124                                 *base = try;
125                                 s->io[i].InUse += num;
126                                 break;
127                         }
128         }
129         return (i == MAX_IO_WIN);
130 } /* alloc_io_space */
131
132
133 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
134                              unsigned int num)
135 {
136         int i;
137
138         for (i = 0; i < MAX_IO_WIN; i++) {
139                 if (!s->io[i].res)
140                         continue;
141                 if ((s->io[i].res->start <= base) &&
142                     (s->io[i].res->end >= base+num-1)) {
143                         s->io[i].InUse -= num;
144                         /* Free the window if no one else is using it */
145                         if (s->io[i].InUse == 0) {
146                                 release_resource(s->io[i].res);
147                                 kfree(s->io[i].res);
148                                 s->io[i].res = NULL;
149                         }
150                 }
151         }
152 } /* release_io_space */
153
154
155 /** pccard_access_configuration_register
156  *
157  * Access_configuration_register() reads and writes configuration
158  * registers in attribute memory.  Memory window 0 is reserved for
159  * this and the tuple reading services.
160  */
161
162 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
163                                          conf_reg_t *reg)
164 {
165         struct pcmcia_socket *s;
166         config_t *c;
167         int addr;
168         u_char val;
169
170         if (!p_dev || !p_dev->function_config)
171                 return CS_NO_CARD;
172
173         s = p_dev->socket;
174         c = p_dev->function_config;
175
176         if (!(c->state & CONFIG_LOCKED))
177                 return CS_CONFIGURATION_LOCKED;
178
179         addr = (c->ConfigBase + reg->Offset) >> 1;
180
181         switch (reg->Action) {
182         case CS_READ:
183                 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
184                 reg->Value = val;
185                 break;
186         case CS_WRITE:
187                 val = reg->Value;
188                 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
189                 break;
190         default:
191                 return CS_BAD_ARGS;
192                 break;
193         }
194         return CS_SUCCESS;
195 } /* pcmcia_access_configuration_register */
196 EXPORT_SYMBOL(pcmcia_access_configuration_register);
197
198
199 int pccard_get_configuration_info(struct pcmcia_socket *s,
200                                   struct pcmcia_device *p_dev,
201                                   config_info_t *config)
202 {
203         config_t *c;
204
205         if (!(s->state & SOCKET_PRESENT))
206                 return CS_NO_CARD;
207
208
209 #ifdef CONFIG_CARDBUS
210         if (s->state & SOCKET_CARDBUS) {
211                 memset(config, 0, sizeof(config_info_t));
212                 config->Vcc = s->socket.Vcc;
213                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
214                 config->Option = s->cb_dev->subordinate->number;
215                 if (s->state & SOCKET_CARDBUS_CONFIG) {
216                         config->Attributes = CONF_VALID_CLIENT;
217                         config->IntType = INT_CARDBUS;
218                         config->AssignedIRQ = s->irq.AssignedIRQ;
219                         if (config->AssignedIRQ)
220                                 config->Attributes |= CONF_ENABLE_IRQ;
221                         if (s->io[0].res) {
222                                 config->BasePort1 = s->io[0].res->start;
223                                 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
224                         }
225                 }
226                 return CS_SUCCESS;
227         }
228 #endif
229
230         if (p_dev) {
231                 c = p_dev->function_config;
232                 config->Function = p_dev->func;
233         } else {
234                 c = NULL;
235                 config->Function = 0;
236         }
237
238         if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
239                 config->Attributes = 0;
240                 config->Vcc = s->socket.Vcc;
241                 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
242                 return CS_SUCCESS;
243         }
244
245         config->Attributes = c->Attributes | CONF_VALID_CLIENT;
246         config->Vcc = s->socket.Vcc;
247         config->Vpp1 = config->Vpp2 = s->socket.Vpp;
248         config->IntType = c->IntType;
249         config->ConfigBase = c->ConfigBase;
250         config->Status = c->Status;
251         config->Pin = c->Pin;
252         config->Copy = c->Copy;
253         config->Option = c->Option;
254         config->ExtStatus = c->ExtStatus;
255         config->Present = config->CardValues = c->CardValues;
256         config->IRQAttributes = c->irq.Attributes;
257         config->AssignedIRQ = s->irq.AssignedIRQ;
258         config->BasePort1 = c->io.BasePort1;
259         config->NumPorts1 = c->io.NumPorts1;
260         config->Attributes1 = c->io.Attributes1;
261         config->BasePort2 = c->io.BasePort2;
262         config->NumPorts2 = c->io.NumPorts2;
263         config->Attributes2 = c->io.Attributes2;
264         config->IOAddrLines = c->io.IOAddrLines;
265
266         return CS_SUCCESS;
267 } /* pccard_get_configuration_info */
268
269 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
270                                   config_info_t *config)
271 {
272         return pccard_get_configuration_info(p_dev->socket, p_dev,
273                                              config);
274 }
275 EXPORT_SYMBOL(pcmcia_get_configuration_info);
276
277
278 /** pcmcia_get_window
279  */
280 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
281                       int idx, win_req_t *req)
282 {
283         window_t *win;
284         int w;
285
286         if (!s || !(s->state & SOCKET_PRESENT))
287                 return CS_NO_CARD;
288         for (w = idx; w < MAX_WIN; w++)
289                 if (s->state & SOCKET_WIN_REQ(w))
290                         break;
291         if (w == MAX_WIN)
292                 return CS_NO_MORE_ITEMS;
293         win = &s->win[w];
294         req->Base = win->ctl.res->start;
295         req->Size = win->ctl.res->end - win->ctl.res->start + 1;
296         req->AccessSpeed = win->ctl.speed;
297         req->Attributes = 0;
298         if (win->ctl.flags & MAP_ATTRIB)
299                 req->Attributes |= WIN_MEMORY_TYPE_AM;
300         if (win->ctl.flags & MAP_ACTIVE)
301                 req->Attributes |= WIN_ENABLE;
302         if (win->ctl.flags & MAP_16BIT)
303                 req->Attributes |= WIN_DATA_WIDTH_16;
304         if (win->ctl.flags & MAP_USE_WAIT)
305                 req->Attributes |= WIN_USE_WAIT;
306         *handle = win;
307         return CS_SUCCESS;
308 } /* pcmcia_get_window */
309 EXPORT_SYMBOL(pcmcia_get_window);
310
311
312 /** pcmcia_get_mem_page
313  *
314  * Change the card address of an already open memory window.
315  */
316 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
317 {
318         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
319                 return CS_BAD_HANDLE;
320         req->Page = 0;
321         req->CardOffset = win->ctl.card_start;
322         return CS_SUCCESS;
323 } /* pcmcia_get_mem_page */
324 EXPORT_SYMBOL(pcmcia_get_mem_page);
325
326
327 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
328 {
329         struct pcmcia_socket *s;
330         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
331                 return CS_BAD_HANDLE;
332         if (req->Page != 0)
333                 return CS_BAD_PAGE;
334         s = win->sock;
335         win->ctl.card_start = req->CardOffset;
336         if (s->ops->set_mem_map(s, &win->ctl) != 0)
337                 return CS_BAD_OFFSET;
338         return CS_SUCCESS;
339 } /* pcmcia_map_mem_page */
340 EXPORT_SYMBOL(pcmcia_map_mem_page);
341
342
343 /** pcmcia_modify_configuration
344  *
345  * Modify a locked socket configuration
346  */
347 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
348                                 modconf_t *mod)
349 {
350         struct pcmcia_socket *s;
351         config_t *c;
352
353         s = p_dev->socket;
354         c = p_dev->function_config;
355
356         if (!(s->state & SOCKET_PRESENT))
357                 return CS_NO_CARD;
358         if (!(c->state & CONFIG_LOCKED))
359                 return CS_CONFIGURATION_LOCKED;
360
361         if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
362                 if (mod->Attributes & CONF_ENABLE_IRQ) {
363                         c->Attributes |= CONF_ENABLE_IRQ;
364                         s->socket.io_irq = s->irq.AssignedIRQ;
365                 } else {
366                         c->Attributes &= ~CONF_ENABLE_IRQ;
367                         s->socket.io_irq = 0;
368                 }
369                 s->ops->set_socket(s, &s->socket);
370         }
371
372         if (mod->Attributes & CONF_VCC_CHANGE_VALID)
373                 return CS_BAD_VCC;
374
375         /* We only allow changing Vpp1 and Vpp2 to the same value */
376         if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
377             (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
378                 if (mod->Vpp1 != mod->Vpp2)
379                         return CS_BAD_VPP;
380                 s->socket.Vpp = mod->Vpp1;
381                 if (s->ops->set_socket(s, &s->socket))
382                         return CS_BAD_VPP;
383         } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
384                    (mod->Attributes & CONF_VPP2_CHANGE_VALID))
385                 return CS_BAD_VPP;
386
387         if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
388                 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
389                 pccard_io_map io_on;
390                 int i;
391
392                 io_on.speed = io_speed;
393                 for (i = 0; i < MAX_IO_WIN; i++) {
394                         if (!s->io[i].res)
395                                 continue;
396                         io_off.map = i;
397                         io_on.map = i;
398
399                         io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
400                         io_on.start = s->io[i].res->start;
401                         io_on.stop = s->io[i].res->end;
402
403                         s->ops->set_io_map(s, &io_off);
404                         mdelay(40);
405                         s->ops->set_io_map(s, &io_on);
406                 }
407         }
408
409         return CS_SUCCESS;
410 } /* modify_configuration */
411 EXPORT_SYMBOL(pcmcia_modify_configuration);
412
413
414 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
415 {
416         pccard_io_map io = { 0, 0, 0, 0, 1 };
417         struct pcmcia_socket *s = p_dev->socket;
418         config_t *c = p_dev->function_config;
419         int i;
420
421         if (p_dev->_locked) {
422                 p_dev->_locked = 0;
423                 if (--(s->lock_count) == 0) {
424                         s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
425                         s->socket.Vpp = 0;
426                         s->socket.io_irq = 0;
427                         s->ops->set_socket(s, &s->socket);
428                 }
429         }
430         if (c->state & CONFIG_LOCKED) {
431                 c->state &= ~CONFIG_LOCKED;
432                 if (c->state & CONFIG_IO_REQ)
433                         for (i = 0; i < MAX_IO_WIN; i++) {
434                                 if (!s->io[i].res)
435                                         continue;
436                                 s->io[i].Config--;
437                                 if (s->io[i].Config != 0)
438                                         continue;
439                                 io.map = i;
440                                 s->ops->set_io_map(s, &io);
441                         }
442         }
443
444         return CS_SUCCESS;
445 } /* pcmcia_release_configuration */
446
447
448 /** pcmcia_release_io
449  *
450  * Release_io() releases the I/O ranges allocated by a client.  This
451  * may be invoked some time after a card ejection has already dumped
452  * the actual socket configuration, so if the client is "stale", we
453  * don't bother checking the port ranges against the current socket
454  * values.
455  */
456 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
457 {
458         struct pcmcia_socket *s = p_dev->socket;
459         config_t *c = p_dev->function_config;
460
461         if (!p_dev->_io )
462                 return CS_BAD_HANDLE;
463
464         p_dev->_io = 0;
465
466         if ((c->io.BasePort1 != req->BasePort1) ||
467             (c->io.NumPorts1 != req->NumPorts1) ||
468             (c->io.BasePort2 != req->BasePort2) ||
469             (c->io.NumPorts2 != req->NumPorts2))
470                 return CS_BAD_ARGS;
471
472         c->state &= ~CONFIG_IO_REQ;
473
474         release_io_space(s, req->BasePort1, req->NumPorts1);
475         if (req->NumPorts2)
476                 release_io_space(s, req->BasePort2, req->NumPorts2);
477
478         return CS_SUCCESS;
479 } /* pcmcia_release_io */
480
481
482 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
483 {
484         struct pcmcia_socket *s = p_dev->socket;
485         config_t *c= p_dev->function_config;
486
487         if (!p_dev->_irq)
488                 return CS_BAD_HANDLE;
489         p_dev->_irq = 0;
490
491         if (c->state & CONFIG_LOCKED)
492                 return CS_CONFIGURATION_LOCKED;
493         if (c->irq.Attributes != req->Attributes)
494                 return CS_BAD_ATTRIBUTE;
495         if (s->irq.AssignedIRQ != req->AssignedIRQ)
496                 return CS_BAD_IRQ;
497         if (--s->irq.Config == 0) {
498                 c->state &= ~CONFIG_IRQ_REQ;
499                 s->irq.AssignedIRQ = 0;
500         }
501
502         if (req->Attributes & IRQ_HANDLE_PRESENT) {
503                 free_irq(req->AssignedIRQ, req->Instance);
504         }
505
506 #ifdef CONFIG_PCMCIA_PROBE
507         pcmcia_used_irq[req->AssignedIRQ]--;
508 #endif
509
510         return CS_SUCCESS;
511 } /* pcmcia_release_irq */
512
513
514 int pcmcia_release_window(window_handle_t win)
515 {
516         struct pcmcia_socket *s;
517
518         if ((win == NULL) || (win->magic != WINDOW_MAGIC))
519                 return CS_BAD_HANDLE;
520         s = win->sock;
521         if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
522                 return CS_BAD_HANDLE;
523
524         /* Shut down memory window */
525         win->ctl.flags &= ~MAP_ACTIVE;
526         s->ops->set_mem_map(s, &win->ctl);
527         s->state &= ~SOCKET_WIN_REQ(win->index);
528
529         /* Release system memory */
530         if (win->ctl.res) {
531                 release_resource(win->ctl.res);
532                 kfree(win->ctl.res);
533                 win->ctl.res = NULL;
534         }
535         win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
536
537         win->magic = 0;
538
539         return CS_SUCCESS;
540 } /* pcmcia_release_window */
541 EXPORT_SYMBOL(pcmcia_release_window);
542
543
544 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
545                                  config_req_t *req)
546 {
547         int i;
548         u_int base;
549         struct pcmcia_socket *s = p_dev->socket;
550         config_t *c;
551         pccard_io_map iomap;
552
553         if (!(s->state & SOCKET_PRESENT))
554                 return CS_NO_CARD;
555
556         if (req->IntType & INT_CARDBUS)
557                 return CS_UNSUPPORTED_MODE;
558         c = p_dev->function_config;
559         if (c->state & CONFIG_LOCKED)
560                 return CS_CONFIGURATION_LOCKED;
561
562         /* Do power control.  We don't allow changes in Vcc. */
563         s->socket.Vpp = req->Vpp;
564         if (s->ops->set_socket(s, &s->socket))
565                 return CS_BAD_VPP;
566
567         /* Pick memory or I/O card, DMA mode, interrupt */
568         c->IntType = req->IntType;
569         c->Attributes = req->Attributes;
570         if (req->IntType & INT_MEMORY_AND_IO)
571                 s->socket.flags |= SS_IOCARD;
572         if (req->IntType & INT_ZOOMED_VIDEO)
573                 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
574         if (req->Attributes & CONF_ENABLE_DMA)
575                 s->socket.flags |= SS_DMA_MODE;
576         if (req->Attributes & CONF_ENABLE_SPKR)
577                 s->socket.flags |= SS_SPKR_ENA;
578         if (req->Attributes & CONF_ENABLE_IRQ)
579                 s->socket.io_irq = s->irq.AssignedIRQ;
580         else
581                 s->socket.io_irq = 0;
582         s->ops->set_socket(s, &s->socket);
583         s->lock_count++;
584
585         /* Set up CIS configuration registers */
586         base = c->ConfigBase = req->ConfigBase;
587         c->CardValues = req->Present;
588         if (req->Present & PRESENT_COPY) {
589                 c->Copy = req->Copy;
590                 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
591         }
592         if (req->Present & PRESENT_OPTION) {
593                 if (s->functions == 1) {
594                         c->Option = req->ConfigIndex & COR_CONFIG_MASK;
595                 } else {
596                         c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
597                         c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
598                         if (req->Present & PRESENT_IOBASE_0)
599                                 c->Option |= COR_ADDR_DECODE;
600                 }
601                 if (c->state & CONFIG_IRQ_REQ)
602                         if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
603                                 c->Option |= COR_LEVEL_REQ;
604                 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
605                 mdelay(40);
606         }
607         if (req->Present & PRESENT_STATUS) {
608                 c->Status = req->Status;
609                 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
610         }
611         if (req->Present & PRESENT_PIN_REPLACE) {
612                 c->Pin = req->Pin;
613                 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
614         }
615         if (req->Present & PRESENT_EXT_STATUS) {
616                 c->ExtStatus = req->ExtStatus;
617                 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
618         }
619         if (req->Present & PRESENT_IOBASE_0) {
620                 u_char b = c->io.BasePort1 & 0xff;
621                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
622                 b = (c->io.BasePort1 >> 8) & 0xff;
623                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
624         }
625         if (req->Present & PRESENT_IOSIZE) {
626                 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
627                 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
628         }
629
630         /* Configure I/O windows */
631         if (c->state & CONFIG_IO_REQ) {
632                 iomap.speed = io_speed;
633                 for (i = 0; i < MAX_IO_WIN; i++)
634                         if (s->io[i].res) {
635                                 iomap.map = i;
636                                 iomap.flags = MAP_ACTIVE;
637                                 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
638                                 case IO_DATA_PATH_WIDTH_16:
639                                         iomap.flags |= MAP_16BIT; break;
640                                 case IO_DATA_PATH_WIDTH_AUTO:
641                                         iomap.flags |= MAP_AUTOSZ; break;
642                                 default:
643                                         break;
644                                 }
645                                 iomap.start = s->io[i].res->start;
646                                 iomap.stop = s->io[i].res->end;
647                                 s->ops->set_io_map(s, &iomap);
648                                 s->io[i].Config++;
649                         }
650         }
651
652         c->state |= CONFIG_LOCKED;
653         p_dev->_locked = 1;
654         return CS_SUCCESS;
655 } /* pcmcia_request_configuration */
656 EXPORT_SYMBOL(pcmcia_request_configuration);
657
658
659 /** pcmcia_request_io
660  *
661  * Request_io() reserves ranges of port addresses for a socket.
662  * I have not implemented range sharing or alias addressing.
663  */
664 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
665 {
666         struct pcmcia_socket *s = p_dev->socket;
667         config_t *c;
668
669         if (!(s->state & SOCKET_PRESENT))
670                 return CS_NO_CARD;
671
672         if (!req)
673                 return CS_UNSUPPORTED_MODE;
674         c = p_dev->function_config;
675         if (c->state & CONFIG_LOCKED)
676                 return CS_CONFIGURATION_LOCKED;
677         if (c->state & CONFIG_IO_REQ)
678                 return CS_IN_USE;
679         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
680                 return CS_BAD_ATTRIBUTE;
681         if ((req->NumPorts2 > 0) &&
682             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
683                 return CS_BAD_ATTRIBUTE;
684
685         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
686                            req->NumPorts1, req->IOAddrLines))
687                 return CS_IN_USE;
688
689         if (req->NumPorts2) {
690                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
691                                    req->NumPorts2, req->IOAddrLines)) {
692                         release_io_space(s, req->BasePort1, req->NumPorts1);
693                         return CS_IN_USE;
694                 }
695         }
696
697         c->io = *req;
698         c->state |= CONFIG_IO_REQ;
699         p_dev->_io = 1;
700         return CS_SUCCESS;
701 } /* pcmcia_request_io */
702 EXPORT_SYMBOL(pcmcia_request_io);
703
704
705 /** pcmcia_request_irq
706  *
707  * Request_irq() reserves an irq for this client.
708  *
709  * Also, since Linux only reserves irq's when they are actually
710  * hooked, we don't guarantee that an irq will still be available
711  * when the configuration is locked.  Now that I think about it,
712  * there might be a way to fix this using a dummy handler.
713  */
714
715 #ifdef CONFIG_PCMCIA_PROBE
716 static irqreturn_t test_action(int cpl, void *dev_id)
717 {
718         return IRQ_NONE;
719 }
720 #endif
721
722 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
723 {
724         struct pcmcia_socket *s = p_dev->socket;
725         config_t *c;
726         int ret = CS_IN_USE, irq = 0;
727         int type;
728
729         if (!(s->state & SOCKET_PRESENT))
730                 return CS_NO_CARD;
731         c = p_dev->function_config;
732         if (c->state & CONFIG_LOCKED)
733                 return CS_CONFIGURATION_LOCKED;
734         if (c->state & CONFIG_IRQ_REQ)
735                 return CS_IN_USE;
736
737         /* Decide what type of interrupt we are registering */
738         type = 0;
739         if (s->functions > 1)           /* All of this ought to be handled higher up */
740                 type = IRQF_SHARED;
741         if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
742                 type = IRQF_SHARED;
743
744 #ifdef CONFIG_PCMCIA_PROBE
745
746 #ifdef IRQ_NOAUTOEN
747         /* if the underlying IRQ infrastructure allows for it, only allocate
748          * the IRQ, but do not enable it
749          */
750         if (!(req->Attributes & IRQ_HANDLE_PRESENT))
751                 type |= IRQ_NOAUTOEN;
752 #endif /* IRQ_NOAUTOEN */
753
754         if (s->irq.AssignedIRQ != 0) {
755                 /* If the interrupt is already assigned, it must be the same */
756                 irq = s->irq.AssignedIRQ;
757         } else {
758                 int try;
759                 u32 mask = s->irq_mask;
760                 void *data = &p_dev->dev.driver; /* something unique to this device */
761
762                 for (try = 0; try < 64; try++) {
763                         irq = try % 32;
764
765                         /* marked as available by driver, and not blocked by userspace? */
766                         if (!((mask >> irq) & 1))
767                                 continue;
768
769                         /* avoid an IRQ which is already used by a PCMCIA card */
770                         if ((try < 32) && pcmcia_used_irq[irq])
771                                 continue;
772
773                         /* register the correct driver, if possible, of check whether
774                          * registering a dummy handle works, i.e. if the IRQ isn't
775                          * marked as used by the kernel resource management core */
776                         ret = request_irq(irq,
777                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
778                                           type,
779                                           p_dev->devname,
780                                           (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
781                         if (!ret) {
782                                 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
783                                         free_irq(irq, data);
784                                 break;
785                         }
786                 }
787         }
788 #endif
789         /* only assign PCI irq if no IRQ already assigned */
790         if (ret && !s->irq.AssignedIRQ) {
791                 if (!s->pci_irq)
792                         return ret;
793                 type = IRQF_SHARED;
794                 irq = s->pci_irq;
795         }
796
797         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
798                 if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
799                         return CS_IN_USE;
800         }
801
802         /* Make sure the fact the request type was overridden is passed back */
803         if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
804                 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
805                 printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
806                 printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n");
807         }
808         c->irq.Attributes = req->Attributes;
809         s->irq.AssignedIRQ = req->AssignedIRQ = irq;
810         s->irq.Config++;
811
812         c->state |= CONFIG_IRQ_REQ;
813         p_dev->_irq = 1;
814
815 #ifdef CONFIG_PCMCIA_PROBE
816         pcmcia_used_irq[irq]++;
817 #endif
818
819         return CS_SUCCESS;
820 } /* pcmcia_request_irq */
821 EXPORT_SYMBOL(pcmcia_request_irq);
822
823
824 /** pcmcia_request_window
825  *
826  * Request_window() establishes a mapping between card memory space
827  * and system memory space.
828  */
829 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
830 {
831         struct pcmcia_socket *s = (*p_dev)->socket;
832         window_t *win;
833         u_long align;
834         int w;
835
836         if (!(s->state & SOCKET_PRESENT))
837                 return CS_NO_CARD;
838         if (req->Attributes & (WIN_PAGED | WIN_SHARED))
839                 return CS_BAD_ATTRIBUTE;
840
841         /* Window size defaults to smallest available */
842         if (req->Size == 0)
843                 req->Size = s->map_size;
844         align = (((s->features & SS_CAP_MEM_ALIGN) ||
845                   (req->Attributes & WIN_STRICT_ALIGN)) ?
846                  req->Size : s->map_size);
847         if (req->Size & (s->map_size-1))
848                 return CS_BAD_SIZE;
849         if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
850             (req->Base & (align-1)))
851                 return CS_BAD_BASE;
852         if (req->Base)
853                 align = 0;
854
855         /* Allocate system memory window */
856         for (w = 0; w < MAX_WIN; w++)
857                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
858         if (w == MAX_WIN)
859                 return CS_OUT_OF_RESOURCE;
860
861         win = &s->win[w];
862         win->magic = WINDOW_MAGIC;
863         win->index = w;
864         win->handle = *p_dev;
865         win->sock = s;
866
867         if (!(s->features & SS_CAP_STATIC_MAP)) {
868                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
869                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
870                 if (!win->ctl.res)
871                         return CS_IN_USE;
872         }
873         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
874
875         /* Configure the socket controller */
876         win->ctl.map = w+1;
877         win->ctl.flags = 0;
878         win->ctl.speed = req->AccessSpeed;
879         if (req->Attributes & WIN_MEMORY_TYPE)
880                 win->ctl.flags |= MAP_ATTRIB;
881         if (req->Attributes & WIN_ENABLE)
882                 win->ctl.flags |= MAP_ACTIVE;
883         if (req->Attributes & WIN_DATA_WIDTH_16)
884                 win->ctl.flags |= MAP_16BIT;
885         if (req->Attributes & WIN_USE_WAIT)
886                 win->ctl.flags |= MAP_USE_WAIT;
887         win->ctl.card_start = 0;
888         if (s->ops->set_mem_map(s, &win->ctl) != 0)
889                 return CS_BAD_ARGS;
890         s->state |= SOCKET_WIN_REQ(w);
891
892         /* Return window handle */
893         if (s->features & SS_CAP_STATIC_MAP) {
894                 req->Base = win->ctl.static_start;
895         } else {
896                 req->Base = win->ctl.res->start;
897         }
898         *wh = win;
899
900         return CS_SUCCESS;
901 } /* pcmcia_request_window */
902 EXPORT_SYMBOL(pcmcia_request_window);
903
904 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
905         pcmcia_release_configuration(p_dev);
906         pcmcia_release_io(p_dev, &p_dev->io);
907         pcmcia_release_irq(p_dev, &p_dev->irq);
908         if (p_dev->win)
909                 pcmcia_release_window(p_dev->win);
910 }
911 EXPORT_SYMBOL(pcmcia_disable_device);
912
913
914 struct pcmcia_cfg_mem {
915         tuple_t tuple;
916         cisparse_t parse;
917         u8 buf[256];
918         cistpl_cftable_entry_t dflt;
919 };
920
921 /**
922  * pcmcia_loop_config() - loop over configuration options
923  * @p_dev:      the struct pcmcia_device which we need to loop for.
924  * @conf_check: function to call for each configuration option.
925  *              It gets passed the struct pcmcia_device, the CIS data
926  *              describing the configuration option, and private data
927  *              being passed to pcmcia_loop_config()
928  * @priv_data:  private data to be passed to the conf_check function.
929  *
930  * pcmcia_loop_config() loops over all configuration options, and calls
931  * the driver-specific conf_check() for each one, checking whether
932  * it is a valid one.
933  */
934 int pcmcia_loop_config(struct pcmcia_device *p_dev,
935                        int      (*conf_check)   (struct pcmcia_device *p_dev,
936                                                  cistpl_cftable_entry_t *cfg,
937                                                  cistpl_cftable_entry_t *dflt,
938                                                  unsigned int vcc,
939                                                  void *priv_data),
940                        void *priv_data)
941 {
942         struct pcmcia_cfg_mem *cfg_mem;
943
944         tuple_t *tuple;
945         int ret = -ENODEV;
946         unsigned int vcc;
947
948         cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
949         if (cfg_mem == NULL)
950                 return -ENOMEM;
951
952         /* get the current Vcc setting */
953         vcc = p_dev->socket->socket.Vcc;
954
955         tuple = &cfg_mem->tuple;
956         tuple->TupleData = cfg_mem->buf;
957         tuple->TupleDataMax = 255;
958         tuple->TupleOffset = 0;
959         tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY;
960         tuple->Attributes = 0;
961
962         ret = pcmcia_get_first_tuple(p_dev, tuple);
963         while (!ret) {
964                 cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry;
965
966                 if (pcmcia_get_tuple_data(p_dev, tuple))
967                         goto next_entry;
968
969                 if (pcmcia_parse_tuple(p_dev, tuple, &cfg_mem->parse))
970                         goto next_entry;
971
972                 /* default values */
973                 p_dev->conf.ConfigIndex = cfg->index;
974                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
975                         cfg_mem->dflt = *cfg;
976
977                 ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data);
978                 if (!ret)
979                         break;
980
981 next_entry:
982                 ret = pcmcia_get_next_tuple(p_dev, tuple);
983         }
984
985         return ret;
986 }
987 EXPORT_SYMBOL(pcmcia_loop_config);