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