?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
libata: mask off DET when restoring SControl for detach
[linux-2.6/mini2440.git] / drivers / pcmcia / pcmcia_resource.c
blob76d4a98f09559b9a78d3f4335a1961b9de11eb6e
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
33
34 /* Access speed for IO windows */
35 static int io_speed = 0;
36 module_param(io_speed, int, 0444);
37
38
39 #ifdef CONFIG_PCMCIA_PROBE
40 #include <asm/irq.h>
41 /* mask of IRQs already reserved by other cards, we should avoid using them */
42 static u8 pcmcia_used_irq[NR_IRQS];
43 #endif
44
45
46 #ifdef CONFIG_PCMCIA_DEBUG
47 extern int ds_pc_debug;
48
49 #define ds_dbg(skt, lvl, fmt, arg...) do { \
50 if (ds_pc_debug >= lvl) \
51 dev_printk(KERN_DEBUG, &skt->dev, \
52 "pcmcia_resource: " fmt, \
53 ## arg); \
54 } while (0)
55 #else
56 #define ds_dbg(skt, 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 -EINVAL;
172
173 s = p_dev->socket;
174 c = p_dev->function_config;
175
176 if (!(c->state & CONFIG_LOCKED))
177 return -EACCES;
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 -EINVAL;
192 break;
193 }
194 return 0;
195 } /* pcmcia_access_configuration_register */
196 EXPORT_SYMBOL(pcmcia_access_configuration_register);
197
198
199 /** pcmcia_get_window
200 */
201 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
202 int idx, win_req_t *req)
203 {
204 window_t *win;
205 int w;
206
207 if (!s || !(s->state & SOCKET_PRESENT))
208 return -ENODEV;
209 for (w = idx; w < MAX_WIN; w++)
210 if (s->state & SOCKET_WIN_REQ(w))
211 break;
212 if (w == MAX_WIN)
213 return -EINVAL;
214 win = &s->win[w];
215 req->Base = win->ctl.res->start;
216 req->Size = win->ctl.res->end - win->ctl.res->start + 1;
217 req->AccessSpeed = win->ctl.speed;
218 req->Attributes = 0;
219 if (win->ctl.flags & MAP_ATTRIB)
220 req->Attributes |= WIN_MEMORY_TYPE_AM;
221 if (win->ctl.flags & MAP_ACTIVE)
222 req->Attributes |= WIN_ENABLE;
223 if (win->ctl.flags & MAP_16BIT)
224 req->Attributes |= WIN_DATA_WIDTH_16;
225 if (win->ctl.flags & MAP_USE_WAIT)
226 req->Attributes |= WIN_USE_WAIT;
227 *handle = win;
228 return 0;
229 } /* pcmcia_get_window */
230 EXPORT_SYMBOL(pcmcia_get_window);
231
232
233 /** pcmcia_get_mem_page
234 *
235 * Change the card address of an already open memory window.
236 */
237 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
238 {
239 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
240 return -EINVAL;
241 req->Page = 0;
242 req->CardOffset = win->ctl.card_start;
243 return 0;
244 } /* pcmcia_get_mem_page */
245 EXPORT_SYMBOL(pcmcia_get_mem_page);
246
247
248 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
249 {
250 struct pcmcia_socket *s;
251 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
252 return -EINVAL;
253 s = win->sock;
254 if (req->Page != 0) {
255 ds_dbg(s, 0, "failure: requested page is zero\n");
256 return -EINVAL;
257 }
258 win->ctl.card_start = req->CardOffset;
259 if (s->ops->set_mem_map(s, &win->ctl) != 0) {
260 ds_dbg(s, 0, "failed to set_mem_map\n");
261 return -EIO;
262 }
263 return 0;
264 } /* pcmcia_map_mem_page */
265 EXPORT_SYMBOL(pcmcia_map_mem_page);
266
267
268 /** pcmcia_modify_configuration
269 *
270 * Modify a locked socket configuration
271 */
272 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
273 modconf_t *mod)
274 {
275 struct pcmcia_socket *s;
276 config_t *c;
277
278 s = p_dev->socket;
279 c = p_dev->function_config;
280
281 if (!(s->state & SOCKET_PRESENT))
282 return -ENODEV;
283 if (!(c->state & CONFIG_LOCKED))
284 return -EACCES;
285
286 if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
287 if (mod->Attributes & CONF_ENABLE_IRQ) {
288 c->Attributes |= CONF_ENABLE_IRQ;
289 s->socket.io_irq = s->irq.AssignedIRQ;
290 } else {
291 c->Attributes &= ~CONF_ENABLE_IRQ;
292 s->socket.io_irq = 0;
293 }
294 s->ops->set_socket(s, &s->socket);
295 }
296
297 if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
298 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n");
299 return -EINVAL;
300 }
301
302 /* We only allow changing Vpp1 and Vpp2 to the same value */
303 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
304 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
305 if (mod->Vpp1 != mod->Vpp2)
306 ds_dbg(s, 0, "Vpp1 and Vpp2 must be the same\n");
307 return -EINVAL;
308 s->socket.Vpp = mod->Vpp1;
309 if (s->ops->set_socket(s, &s->socket)) {
310 dev_printk(KERN_WARNING, &s->dev,
311 "Unable to set VPP\n");
312 return -EIO;
313 }
314 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
315 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
316 ds_dbg(s, 0, "changing Vcc is not allowed at this time\n");
317 return -EINVAL;
318 }
319
320 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
321 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
322 pccard_io_map io_on;
323 int i;
324
325 io_on.speed = io_speed;
326 for (i = 0; i < MAX_IO_WIN; i++) {
327 if (!s->io[i].res)
328 continue;
329 io_off.map = i;
330 io_on.map = i;
331
332 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
333 io_on.start = s->io[i].res->start;
334 io_on.stop = s->io[i].res->end;
335
336 s->ops->set_io_map(s, &io_off);
337 mdelay(40);
338 s->ops->set_io_map(s, &io_on);
339 }
340 }
341
342 return 0;
343 } /* modify_configuration */
344 EXPORT_SYMBOL(pcmcia_modify_configuration);
345
346
347 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
348 {
349 pccard_io_map io = { 0, 0, 0, 0, 1 };
350 struct pcmcia_socket *s = p_dev->socket;
351 config_t *c = p_dev->function_config;
352 int i;
353
354 if (p_dev->_locked) {
355 p_dev->_locked = 0;
356 if (--(s->lock_count) == 0) {
357 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
358 s->socket.Vpp = 0;
359 s->socket.io_irq = 0;
360 s->ops->set_socket(s, &s->socket);
361 }
362 }
363 if (c->state & CONFIG_LOCKED) {
364 c->state &= ~CONFIG_LOCKED;
365 if (c->state & CONFIG_IO_REQ)
366 for (i = 0; i < MAX_IO_WIN; i++) {
367 if (!s->io[i].res)
368 continue;
369 s->io[i].Config--;
370 if (s->io[i].Config != 0)
371 continue;
372 io.map = i;
373 s->ops->set_io_map(s, &io);
374 }
375 }
376
377 return 0;
378 } /* pcmcia_release_configuration */
379
380
381 /** pcmcia_release_io
382 *
383 * Release_io() releases the I/O ranges allocated by a client. This
384 * may be invoked some time after a card ejection has already dumped
385 * the actual socket configuration, so if the client is "stale", we
386 * don't bother checking the port ranges against the current socket
387 * values.
388 */
389 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
390 {
391 struct pcmcia_socket *s = p_dev->socket;
392 config_t *c = p_dev->function_config;
393
394 if (!p_dev->_io )
395 return -EINVAL;
396
397 p_dev->_io = 0;
398
399 if ((c->io.BasePort1 != req->BasePort1) ||
400 (c->io.NumPorts1 != req->NumPorts1) ||
401 (c->io.BasePort2 != req->BasePort2) ||
402 (c->io.NumPorts2 != req->NumPorts2))
403 return -EINVAL;
404
405 c->state &= ~CONFIG_IO_REQ;
406
407 release_io_space(s, req->BasePort1, req->NumPorts1);
408 if (req->NumPorts2)
409 release_io_space(s, req->BasePort2, req->NumPorts2);
410
411 return 0;
412 } /* pcmcia_release_io */
413
414
415 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
416 {
417 struct pcmcia_socket *s = p_dev->socket;
418 config_t *c= p_dev->function_config;
419
420 if (!p_dev->_irq)
421 return -EINVAL;
422 p_dev->_irq = 0;
423
424 if (c->state & CONFIG_LOCKED)
425 return -EACCES;
426 if (c->irq.Attributes != req->Attributes) {
427 ds_dbg(s, 0, "IRQ attributes must match assigned ones\n");
428 return -EINVAL;
429 }
430 if (s->irq.AssignedIRQ != req->AssignedIRQ) {
431 ds_dbg(s, 0, "IRQ must match assigned one\n");
432 return -EINVAL;
433 }
434 if (--s->irq.Config == 0) {
435 c->state &= ~CONFIG_IRQ_REQ;
436 s->irq.AssignedIRQ = 0;
437 }
438
439 if (req->Attributes & IRQ_HANDLE_PRESENT) {
440 free_irq(req->AssignedIRQ, req->Instance);
441 }
442
443 #ifdef CONFIG_PCMCIA_PROBE
444 pcmcia_used_irq[req->AssignedIRQ]--;
445 #endif
446
447 return 0;
448 } /* pcmcia_release_irq */
449
450
451 int pcmcia_release_window(window_handle_t win)
452 {
453 struct pcmcia_socket *s;
454
455 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
456 return -EINVAL;
457 s = win->sock;
458 if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
459 return -EINVAL;
460
461 /* Shut down memory window */
462 win->ctl.flags &= ~MAP_ACTIVE;
463 s->ops->set_mem_map(s, &win->ctl);
464 s->state &= ~SOCKET_WIN_REQ(win->index);
465
466 /* Release system memory */
467 if (win->ctl.res) {
468 release_resource(win->ctl.res);
469 kfree(win->ctl.res);
470 win->ctl.res = NULL;
471 }
472 win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
473
474 win->magic = 0;
475
476 return 0;
477 } /* pcmcia_release_window */
478 EXPORT_SYMBOL(pcmcia_release_window);
479
480
481 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
482 config_req_t *req)
483 {
484 int i;
485 u_int base;
486 struct pcmcia_socket *s = p_dev->socket;
487 config_t *c;
488 pccard_io_map iomap;
489
490 if (!(s->state & SOCKET_PRESENT))
491 return -ENODEV;;
492
493 if (req->IntType & INT_CARDBUS) {
494 ds_dbg(p_dev->socket, 0, "IntType may not be INT_CARDBUS\n");
495 return -EINVAL;
496 }
497 c = p_dev->function_config;
498 if (c->state & CONFIG_LOCKED)
499 return -EACCES;
500
501 /* Do power control. We don't allow changes in Vcc. */
502 s->socket.Vpp = req->Vpp;
503 if (s->ops->set_socket(s, &s->socket)) {
504 dev_printk(KERN_WARNING, &s->dev,
505 "Unable to set socket state\n");
506 return -EINVAL;
507 }
508
509 /* Pick memory or I/O card, DMA mode, interrupt */
510 c->IntType = req->IntType;
511 c->Attributes = req->Attributes;
512 if (req->IntType & INT_MEMORY_AND_IO)
513 s->socket.flags |= SS_IOCARD;
514 if (req->IntType & INT_ZOOMED_VIDEO)
515 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
516 if (req->Attributes & CONF_ENABLE_DMA)
517 s->socket.flags |= SS_DMA_MODE;
518 if (req->Attributes & CONF_ENABLE_SPKR)
519 s->socket.flags |= SS_SPKR_ENA;
520 if (req->Attributes & CONF_ENABLE_IRQ)
521 s->socket.io_irq = s->irq.AssignedIRQ;
522 else
523 s->socket.io_irq = 0;
524 s->ops->set_socket(s, &s->socket);
525 s->lock_count++;
526
527 /* Set up CIS configuration registers */
528 base = c->ConfigBase = req->ConfigBase;
529 c->CardValues = req->Present;
530 if (req->Present & PRESENT_COPY) {
531 c->Copy = req->Copy;
532 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
533 }
534 if (req->Present & PRESENT_OPTION) {
535 if (s->functions == 1) {
536 c->Option = req->ConfigIndex & COR_CONFIG_MASK;
537 } else {
538 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
539 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
540 if (req->Present & PRESENT_IOBASE_0)
541 c->Option |= COR_ADDR_DECODE;
542 }
543 if (c->state & CONFIG_IRQ_REQ)
544 if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
545 c->Option |= COR_LEVEL_REQ;
546 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
547 mdelay(40);
548 }
549 if (req->Present & PRESENT_STATUS) {
550 c->Status = req->Status;
551 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
552 }
553 if (req->Present & PRESENT_PIN_REPLACE) {
554 c->Pin = req->Pin;
555 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
556 }
557 if (req->Present & PRESENT_EXT_STATUS) {
558 c->ExtStatus = req->ExtStatus;
559 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
560 }
561 if (req->Present & PRESENT_IOBASE_0) {
562 u_char b = c->io.BasePort1 & 0xff;
563 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
564 b = (c->io.BasePort1 >> 8) & 0xff;
565 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
566 }
567 if (req->Present & PRESENT_IOSIZE) {
568 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
569 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
570 }
571
572 /* Configure I/O windows */
573 if (c->state & CONFIG_IO_REQ) {
574 iomap.speed = io_speed;
575 for (i = 0; i < MAX_IO_WIN; i++)
576 if (s->io[i].res) {
577 iomap.map = i;
578 iomap.flags = MAP_ACTIVE;
579 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
580 case IO_DATA_PATH_WIDTH_16:
581 iomap.flags |= MAP_16BIT; break;
582 case IO_DATA_PATH_WIDTH_AUTO:
583 iomap.flags |= MAP_AUTOSZ; break;
584 default:
585 break;
586 }
587 iomap.start = s->io[i].res->start;
588 iomap.stop = s->io[i].res->end;
589 s->ops->set_io_map(s, &iomap);
590 s->io[i].Config++;
591 }
592 }
593
594 c->state |= CONFIG_LOCKED;
595 p_dev->_locked = 1;
596 return 0;
597 } /* pcmcia_request_configuration */
598 EXPORT_SYMBOL(pcmcia_request_configuration);
599
600
601 /** pcmcia_request_io
602 *
603 * Request_io() reserves ranges of port addresses for a socket.
604 * I have not implemented range sharing or alias addressing.
605 */
606 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
607 {
608 struct pcmcia_socket *s = p_dev->socket;
609 config_t *c;
610
611 if (!(s->state & SOCKET_PRESENT))
612 return -ENODEV;
613
614 if (!req)
615 return -EINVAL;
616 c = p_dev->function_config;
617 if (c->state & CONFIG_LOCKED)
618 return -EACCES;
619 if (c->state & CONFIG_IO_REQ) {
620 ds_dbg(s, 0, "IO already configured\n");
621 return -EBUSY;
622 }
623 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
624 ds_dbg(s, 0, "bad attribute setting for IO region 1\n");
625 return -EINVAL;
626 }
627 if ((req->NumPorts2 > 0) &&
628 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
629 ds_dbg(s, 0, "bad attribute setting for IO region 2\n");
630 return -EINVAL;
631 }
632
633 ds_dbg(s, 1, "trying to allocate resource 1\n");
634 if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
635 req->NumPorts1, req->IOAddrLines)) {
636 ds_dbg(s, 0, "allocation of resource 1 failed\n");
637 return -EBUSY;
638 }
639
640 if (req->NumPorts2) {
641 ds_dbg(s, 1, "trying to allocate resource 2\n");
642 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
643 req->NumPorts2, req->IOAddrLines)) {
644 ds_dbg(s, 0, "allocation of resource 2 failed\n");
645 release_io_space(s, req->BasePort1, req->NumPorts1);
646 return -EBUSY;
647 }
648 }
649
650 c->io = *req;
651 c->state |= CONFIG_IO_REQ;
652 p_dev->_io = 1;
653 return 0;
654 } /* pcmcia_request_io */
655 EXPORT_SYMBOL(pcmcia_request_io);
656
657
658 /** pcmcia_request_irq
659 *
660 * Request_irq() reserves an irq for this client.
661 *
662 * Also, since Linux only reserves irq's when they are actually
663 * hooked, we don't guarantee that an irq will still be available
664 * when the configuration is locked. Now that I think about it,
665 * there might be a way to fix this using a dummy handler.
666 */
667
668 #ifdef CONFIG_PCMCIA_PROBE
669 static irqreturn_t test_action(int cpl, void *dev_id)
670 {
671 return IRQ_NONE;
672 }
673 #endif
674
675 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
676 {
677 struct pcmcia_socket *s = p_dev->socket;
678 config_t *c;
679 int ret = -EINVAL, irq = 0;
680 int type;
681
682 if (!(s->state & SOCKET_PRESENT))
683 return -ENODEV;
684 c = p_dev->function_config;
685 if (c->state & CONFIG_LOCKED)
686 return -EACCES;
687 if (c->state & CONFIG_IRQ_REQ) {
688 ds_dbg(s, 0, "IRQ already configured\n");
689 return -EBUSY;
690 }
691
692 /* Decide what type of interrupt we are registering */
693 type = 0;
694 if (s->functions > 1) /* All of this ought to be handled higher up */
695 type = IRQF_SHARED;
696 else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
697 type = IRQF_SHARED;
698 else printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n");
699
700 #ifdef CONFIG_PCMCIA_PROBE
701
702 #ifdef IRQ_NOAUTOEN
703 /* if the underlying IRQ infrastructure allows for it, only allocate
704 * the IRQ, but do not enable it
705 */
706 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
707 type |= IRQ_NOAUTOEN;
708 #endif /* IRQ_NOAUTOEN */
709
710 if (s->irq.AssignedIRQ != 0) {
711 /* If the interrupt is already assigned, it must be the same */
712 irq = s->irq.AssignedIRQ;
713 } else {
714 int try;
715 u32 mask = s->irq_mask;
716 void *data = &p_dev->dev.driver; /* something unique to this device */
717
718 for (try = 0; try < 64; try++) {
719 irq = try % 32;
720
721 /* marked as available by driver, and not blocked by userspace? */
722 if (!((mask >> irq) & 1))
723 continue;
724
725 /* avoid an IRQ which is already used by a PCMCIA card */
726 if ((try < 32) && pcmcia_used_irq[irq])
727 continue;
728
729 /* register the correct driver, if possible, of check whether
730 * registering a dummy handle works, i.e. if the IRQ isn't
731 * marked as used by the kernel resource management core */
732 ret = request_irq(irq,
733 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
734 type,
735 p_dev->devname,
736 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
737 if (!ret) {
738 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
739 free_irq(irq, data);
740 break;
741 }
742 }
743 }
744 #endif
745 /* only assign PCI irq if no IRQ already assigned */
746 if (ret && !s->irq.AssignedIRQ) {
747 if (!s->pci_irq)
748 return ret;
749 type = IRQF_SHARED;
750 irq = s->pci_irq;
751 }
752
753 if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
754 ret = request_irq(irq, req->Handler, type,
755 p_dev->devname, req->Instance);
756 if (ret)
757 return ret;
758 }
759
760 /* Make sure the fact the request type was overridden is passed back */
761 if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
762 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
763 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
764 "request for exclusive IRQ could not be fulfilled.\n");
765 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
766 "needs updating to supported shared IRQ lines.\n");
767 }
768 c->irq.Attributes = req->Attributes;
769 s->irq.AssignedIRQ = req->AssignedIRQ = irq;
770 s->irq.Config++;
771
772 c->state |= CONFIG_IRQ_REQ;
773 p_dev->_irq = 1;
774
775 #ifdef CONFIG_PCMCIA_PROBE
776 pcmcia_used_irq[irq]++;
777 #endif
778
779 return 0;
780 } /* pcmcia_request_irq */
781 EXPORT_SYMBOL(pcmcia_request_irq);
782
783
784 /** pcmcia_request_window
785 *
786 * Request_window() establishes a mapping between card memory space
787 * and system memory space.
788 */
789 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
790 {
791 struct pcmcia_socket *s = (*p_dev)->socket;
792 window_t *win;
793 u_long align;
794 int w;
795
796 if (!(s->state & SOCKET_PRESENT))
797 return -ENODEV;
798 if (req->Attributes & (WIN_PAGED | WIN_SHARED)) {
799 ds_dbg(s, 0, "bad attribute setting for iomem region\n");
800 return -EINVAL;
801 }
802
803 /* Window size defaults to smallest available */
804 if (req->Size == 0)
805 req->Size = s->map_size;
806 align = (((s->features & SS_CAP_MEM_ALIGN) ||
807 (req->Attributes & WIN_STRICT_ALIGN)) ?
808 req->Size : s->map_size);
809 if (req->Size & (s->map_size-1)) {
810 ds_dbg(s, 0, "invalid map size\n");
811 return -EINVAL;
812 }
813 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
814 (req->Base & (align-1))) {
815 ds_dbg(s, 0, "invalid base address\n");
816 return -EINVAL;
817 }
818 if (req->Base)
819 align = 0;
820
821 /* Allocate system memory window */
822 for (w = 0; w < MAX_WIN; w++)
823 if (!(s->state & SOCKET_WIN_REQ(w))) break;
824 if (w == MAX_WIN) {
825 ds_dbg(s, 0, "all windows are used already\n");
826 return -EINVAL;
827 }
828
829 win = &s->win[w];
830 win->magic = WINDOW_MAGIC;
831 win->index = w;
832 win->handle = *p_dev;
833 win->sock = s;
834
835 if (!(s->features & SS_CAP_STATIC_MAP)) {
836 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
837 (req->Attributes & WIN_MAP_BELOW_1MB), s);
838 if (!win->ctl.res) {
839 ds_dbg(s, 0, "allocating mem region failed\n");
840 return -EINVAL;
841 }
842 }
843 (*p_dev)->_win |= CLIENT_WIN_REQ(w);
844
845 /* Configure the socket controller */
846 win->ctl.map = w+1;
847 win->ctl.flags = 0;
848 win->ctl.speed = req->AccessSpeed;
849 if (req->Attributes & WIN_MEMORY_TYPE)
850 win->ctl.flags |= MAP_ATTRIB;
851 if (req->Attributes & WIN_ENABLE)
852 win->ctl.flags |= MAP_ACTIVE;
853 if (req->Attributes & WIN_DATA_WIDTH_16)
854 win->ctl.flags |= MAP_16BIT;
855 if (req->Attributes & WIN_USE_WAIT)
856 win->ctl.flags |= MAP_USE_WAIT;
857 win->ctl.card_start = 0;
858 if (s->ops->set_mem_map(s, &win->ctl) != 0) {
859 ds_dbg(s, 0, "failed to set memory mapping\n");
860 return -EIO;
861 }
862 s->state |= SOCKET_WIN_REQ(w);
863
864 /* Return window handle */
865 if (s->features & SS_CAP_STATIC_MAP) {
866 req->Base = win->ctl.static_start;
867 } else {
868 req->Base = win->ctl.res->start;
869 }
870 *wh = win;
871
872 return 0;
873 } /* pcmcia_request_window */
874 EXPORT_SYMBOL(pcmcia_request_window);
875
876 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
877 pcmcia_release_configuration(p_dev);
878 pcmcia_release_io(p_dev, &p_dev->io);
879 pcmcia_release_irq(p_dev, &p_dev->irq);
880 if (p_dev->win)
881 pcmcia_release_window(p_dev->win);
882 }
883 EXPORT_SYMBOL(pcmcia_disable_device);
884
885
886 struct pcmcia_cfg_mem {
887 tuple_t tuple;
888 cisparse_t parse;
889 u8 buf[256];
890 cistpl_cftable_entry_t dflt;
891 };
892
893 /**
894 * pcmcia_loop_config() - loop over configuration options
895 * @p_dev: the struct pcmcia_device which we need to loop for.
896 * @conf_check: function to call for each configuration option.
897 * It gets passed the struct pcmcia_device, the CIS data
898 * describing the configuration option, and private data
899 * being passed to pcmcia_loop_config()
900 * @priv_data: private data to be passed to the conf_check function.
901 *
902 * pcmcia_loop_config() loops over all configuration options, and calls
903 * the driver-specific conf_check() for each one, checking whether
904 * it is a valid one.
905 */
906 int pcmcia_loop_config(struct pcmcia_device *p_dev,
907 int (*conf_check) (struct pcmcia_device *p_dev,
908 cistpl_cftable_entry_t *cfg,
909 cistpl_cftable_entry_t *dflt,
910 unsigned int vcc,
911 void *priv_data),
912 void *priv_data)
913 {
914 struct pcmcia_cfg_mem *cfg_mem;
915
916 tuple_t *tuple;
917 int ret = -ENODEV;
918 unsigned int vcc;
919
920 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
921 if (cfg_mem == NULL)
922 return -ENOMEM;
923
924 /* get the current Vcc setting */
925 vcc = p_dev->socket->socket.Vcc;
926
927 tuple = &cfg_mem->tuple;
928 tuple->TupleData = cfg_mem->buf;
929 tuple->TupleDataMax = 255;
930 tuple->TupleOffset = 0;
931 tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY;
932 tuple->Attributes = 0;
933
934 ret = pcmcia_get_first_tuple(p_dev, tuple);
935 while (!ret) {
936 cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry;
937
938 if (pcmcia_get_tuple_data(p_dev, tuple))
939 goto next_entry;
940
941 if (pcmcia_parse_tuple(tuple, &cfg_mem->parse))
942 goto next_entry;
943
944 /* default values */
945 p_dev->conf.ConfigIndex = cfg->index;
946 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
947 cfg_mem->dflt = *cfg;
948
949 ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data);
950 if (!ret)
951 break;
952
953 next_entry:
954 ret = pcmcia_get_next_tuple(p_dev, tuple);
955 }
956
957 return ret;
958 }
959 EXPORT_SYMBOL(pcmcia_loop_config);
Support for the Chinese Samsung S3C2440 based development boards