xref: /linux/drivers/pcmcia/pcmcia_resource.c (revision 20d0021394c1b070bf04b22c5bc8fdb437edd4c5)
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/config.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/interrupt.h>
21 #include <linux/delay.h>
22 #include <linux/pci.h>
23 #include <linux/device.h>
24 
25 #define IN_CARD_SERVICES
26 #include <pcmcia/cs_types.h>
27 #include <pcmcia/ss.h>
28 #include <pcmcia/cs.h>
29 #include <pcmcia/bulkmem.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/cisreg.h>
32 #include <pcmcia/ds.h>
33 
34 #include "cs_internal.h"
35 #include "ds_internal.h"
36 
37 
38 /* Access speed for IO windows */
39 static int io_speed = 0;
40 module_param(io_speed, int, 0444);
41 
42 
43 #ifdef CONFIG_PCMCIA_PROBE
44 /* mask of IRQs already reserved by other cards, we should avoid using them */
45 static u8 pcmcia_used_irq[NR_IRQS];
46 #endif
47 
48 
49 #ifdef DEBUG
50 extern int ds_pc_debug;
51 #define cs_socket_name(skt)    ((skt)->dev.class_id)
52 
53 #define ds_dbg(skt, lvl, fmt, arg...) do {			\
54 	if (ds_pc_debug >= lvl)					\
55 		printk(KERN_DEBUG "pcmcia_resource: %s: " fmt,	\
56 			cs_socket_name(skt) , ## arg);		\
57 } while (0)
58 #else
59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
60 #endif
61 
62 
63 
64 /** alloc_io_space
65  *
66  * Special stuff for managing IO windows, because they are scarce
67  */
68 
69 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
70 			  ioaddr_t num, u_int lines)
71 {
72 	int i;
73 	kio_addr_t try, align;
74 
75 	align = (*base) ? (lines ? 1<<lines : 0) : 1;
76 	if (align && (align < num)) {
77 		if (*base) {
78 			ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
79 			       num, align);
80 			align = 0;
81 		} else
82 			while (align && (align < num)) align <<= 1;
83 	}
84 	if (*base & ~(align-1)) {
85 		ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
86 		       *base, align);
87 		align = 0;
88 	}
89 	if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
90 		*base = s->io_offset | (*base & 0x0fff);
91 		s->io[0].Attributes = attr;
92 		return 0;
93 	}
94 	/* Check for an already-allocated window that must conflict with
95 	 * what was asked for.  It is a hack because it does not catch all
96 	 * potential conflicts, just the most obvious ones.
97 	 */
98 	for (i = 0; i < MAX_IO_WIN; i++)
99 		if ((s->io[i].NumPorts != 0) &&
100 		    ((s->io[i].BasePort & (align-1)) == *base))
101 			return 1;
102 	for (i = 0; i < MAX_IO_WIN; i++) {
103 		if (s->io[i].NumPorts == 0) {
104 			s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
105 			if (s->io[i].res) {
106 				s->io[i].Attributes = attr;
107 				s->io[i].BasePort = *base = s->io[i].res->start;
108 				s->io[i].NumPorts = s->io[i].InUse = num;
109 				break;
110 			} else
111 				return 1;
112 		} else if (s->io[i].Attributes != attr)
113 			continue;
114 		/* Try to extend top of window */
115 		try = s->io[i].BasePort + s->io[i].NumPorts;
116 		if ((*base == 0) || (*base == try))
117 			if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
118 						    s->io[i].res->end + num, s) == 0) {
119 				*base = try;
120 				s->io[i].NumPorts += num;
121 				s->io[i].InUse += num;
122 				break;
123 			}
124 		/* Try to extend bottom of window */
125 		try = s->io[i].BasePort - num;
126 		if ((*base == 0) || (*base == try))
127 			if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
128 						    s->io[i].res->end, s) == 0) {
129 				s->io[i].BasePort = *base = try;
130 				s->io[i].NumPorts += num;
131 				s->io[i].InUse += num;
132 				break;
133 			}
134 	}
135 	return (i == MAX_IO_WIN);
136 } /* alloc_io_space */
137 
138 
139 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
140 			     ioaddr_t num)
141 {
142 	int i;
143 
144 	for (i = 0; i < MAX_IO_WIN; i++) {
145 		if ((s->io[i].BasePort <= base) &&
146 		    (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
147 			s->io[i].InUse -= num;
148 			/* Free the window if no one else is using it */
149 			if (s->io[i].InUse == 0) {
150 				s->io[i].NumPorts = 0;
151 				release_resource(s->io[i].res);
152 				kfree(s->io[i].res);
153 				s->io[i].res = NULL;
154 			}
155 		}
156 	}
157 } /* release_io_space */
158 
159 
160 /** pccard_access_configuration_register
161  *
162  * Access_configuration_register() reads and writes configuration
163  * registers in attribute memory.  Memory window 0 is reserved for
164  * this and the tuple reading services.
165  */
166 
167 int pccard_access_configuration_register(struct pcmcia_socket *s,
168 					 unsigned int function,
169 					 conf_reg_t *reg)
170 {
171 	config_t *c;
172 	int addr;
173 	u_char val;
174 
175 	if (!s || !s->config)
176 		return CS_NO_CARD;
177 
178 	c = &s->config[function];
179 
180 	if (c == NULL)
181 		return CS_NO_CARD;
182 
183 	if (!(c->state & CONFIG_LOCKED))
184 		return CS_CONFIGURATION_LOCKED;
185 
186 	addr = (c->ConfigBase + reg->Offset) >> 1;
187 
188 	switch (reg->Action) {
189 	case CS_READ:
190 		pcmcia_read_cis_mem(s, 1, addr, 1, &val);
191 		reg->Value = val;
192 		break;
193 	case CS_WRITE:
194 		val = reg->Value;
195 		pcmcia_write_cis_mem(s, 1, addr, 1, &val);
196 		break;
197 	default:
198 		return CS_BAD_ARGS;
199 		break;
200 	}
201 	return CS_SUCCESS;
202 } /* pccard_access_configuration_register */
203 
204 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
205 					 conf_reg_t *reg)
206 {
207 	return pccard_access_configuration_register(p_dev->socket,
208 						    p_dev->func, reg);
209 }
210 EXPORT_SYMBOL(pcmcia_access_configuration_register);
211 
212 
213 
214 int pccard_get_configuration_info(struct pcmcia_socket *s,
215 				  unsigned int function,
216 				  config_info_t *config)
217 {
218 	config_t *c;
219 
220 	if (!(s->state & SOCKET_PRESENT))
221 		return CS_NO_CARD;
222 
223 	config->Function = function;
224 
225 #ifdef CONFIG_CARDBUS
226 	if (s->state & SOCKET_CARDBUS) {
227 		memset(config, 0, sizeof(config_info_t));
228 		config->Vcc = s->socket.Vcc;
229 		config->Vpp1 = config->Vpp2 = s->socket.Vpp;
230 		config->Option = s->cb_dev->subordinate->number;
231 		if (s->state & SOCKET_CARDBUS_CONFIG) {
232 			config->Attributes = CONF_VALID_CLIENT;
233 			config->IntType = INT_CARDBUS;
234 			config->AssignedIRQ = s->irq.AssignedIRQ;
235 			if (config->AssignedIRQ)
236 				config->Attributes |= CONF_ENABLE_IRQ;
237 			config->BasePort1 = s->io[0].BasePort;
238 			config->NumPorts1 = s->io[0].NumPorts;
239 		}
240 		return CS_SUCCESS;
241 	}
242 #endif
243 
244 	c = (s->config != NULL) ? &s->config[function] : NULL;
245 
246 	if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
247 		config->Attributes = 0;
248 		config->Vcc = s->socket.Vcc;
249 		config->Vpp1 = config->Vpp2 = s->socket.Vpp;
250 		return CS_SUCCESS;
251 	}
252 
253 	/* !!! This is a hack !!! */
254 	memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
255 	config->Attributes |= CONF_VALID_CLIENT;
256 	config->CardValues = c->CardValues;
257 	config->IRQAttributes = c->irq.Attributes;
258 	config->AssignedIRQ = s->irq.AssignedIRQ;
259 	config->BasePort1 = c->io.BasePort1;
260 	config->NumPorts1 = c->io.NumPorts1;
261 	config->Attributes1 = c->io.Attributes1;
262 	config->BasePort2 = c->io.BasePort2;
263 	config->NumPorts2 = c->io.NumPorts2;
264 	config->Attributes2 = c->io.Attributes2;
265 	config->IOAddrLines = c->io.IOAddrLines;
266 
267 	return CS_SUCCESS;
268 } /* pccard_get_configuration_info */
269 
270 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
271 				  config_info_t *config)
272 {
273 	return pccard_get_configuration_info(p_dev->socket, p_dev->func,
274 					     config);
275 }
276 EXPORT_SYMBOL(pcmcia_get_configuration_info);
277 
278 
279 /** pcmcia_get_window
280  */
281 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
282 		      int idx, win_req_t *req)
283 {
284 	window_t *win;
285 	int w;
286 
287 	if (!s || !(s->state & SOCKET_PRESENT))
288 		return CS_NO_CARD;
289 	for (w = idx; w < MAX_WIN; w++)
290 		if (s->state & SOCKET_WIN_REQ(w))
291 			break;
292 	if (w == MAX_WIN)
293 		return CS_NO_MORE_ITEMS;
294 	win = &s->win[w];
295 	req->Base = win->ctl.res->start;
296 	req->Size = win->ctl.res->end - win->ctl.res->start + 1;
297 	req->AccessSpeed = win->ctl.speed;
298 	req->Attributes = 0;
299 	if (win->ctl.flags & MAP_ATTRIB)
300 		req->Attributes |= WIN_MEMORY_TYPE_AM;
301 	if (win->ctl.flags & MAP_ACTIVE)
302 		req->Attributes |= WIN_ENABLE;
303 	if (win->ctl.flags & MAP_16BIT)
304 		req->Attributes |= WIN_DATA_WIDTH_16;
305 	if (win->ctl.flags & MAP_USE_WAIT)
306 		req->Attributes |= WIN_USE_WAIT;
307 	*handle = win;
308 	return CS_SUCCESS;
309 } /* pcmcia_get_window */
310 EXPORT_SYMBOL(pcmcia_get_window);
311 
312 
313 /** pccard_get_status
314  *
315  * Get the current socket state bits.  We don't support the latched
316  * SocketState yet: I haven't seen any point for it.
317  */
318 
319 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
320 		      cs_status_t *status)
321 {
322 	config_t *c;
323 	int val;
324 
325 	s->ops->get_status(s, &val);
326 	status->CardState = status->SocketState = 0;
327 	status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
328 	status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
329 	status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
330 	status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
331 	if (s->state & SOCKET_SUSPEND)
332 		status->CardState |= CS_EVENT_PM_SUSPEND;
333 	if (!(s->state & SOCKET_PRESENT))
334 		return CS_NO_CARD;
335 
336 	c = (s->config != NULL) ? &s->config[function] : NULL;
337 	if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
338 	    (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
339 		u_char reg;
340 		if (c->Present & PRESENT_PIN_REPLACE) {
341 			pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
342 			status->CardState |=
343 				(reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
344 			status->CardState |=
345 				(reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
346 			status->CardState |=
347 				(reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
348 			status->CardState |=
349 				(reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
350 		} else {
351 			/* No PRR?  Then assume we're always ready */
352 			status->CardState |= CS_EVENT_READY_CHANGE;
353 		}
354 		if (c->Present & PRESENT_EXT_STATUS) {
355 			pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
356 			status->CardState |=
357 				(reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
358 		}
359 		return CS_SUCCESS;
360 	}
361 	status->CardState |=
362 		(val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
363 	status->CardState |=
364 		(val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
365 	status->CardState |=
366 		(val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
367 	status->CardState |=
368 		(val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
369 	return CS_SUCCESS;
370 } /* pccard_get_status */
371 
372 int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
373 {
374 	struct pcmcia_socket *s;
375 	s = SOCKET(handle);
376 	return pccard_get_status(s, handle->func, status);
377 }
378 EXPORT_SYMBOL(pcmcia_get_status);
379 
380 
381 
382 /** pcmcia_get_mem_page
383  *
384  * Change the card address of an already open memory window.
385  */
386 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
387 {
388 	if ((win == NULL) || (win->magic != WINDOW_MAGIC))
389 		return CS_BAD_HANDLE;
390 	req->Page = 0;
391 	req->CardOffset = win->ctl.card_start;
392 	return CS_SUCCESS;
393 } /* pcmcia_get_mem_page */
394 EXPORT_SYMBOL(pcmcia_get_mem_page);
395 
396 
397 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
398 {
399 	struct pcmcia_socket *s;
400 	if ((win == NULL) || (win->magic != WINDOW_MAGIC))
401 		return CS_BAD_HANDLE;
402 	if (req->Page != 0)
403 		return CS_BAD_PAGE;
404 	s = win->sock;
405 	win->ctl.card_start = req->CardOffset;
406 	if (s->ops->set_mem_map(s, &win->ctl) != 0)
407 		return CS_BAD_OFFSET;
408 	return CS_SUCCESS;
409 } /* pcmcia_map_mem_page */
410 EXPORT_SYMBOL(pcmcia_map_mem_page);
411 
412 
413 /** pcmcia_modify_configuration
414  *
415  * Modify a locked socket configuration
416  */
417 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
418 				modconf_t *mod)
419 {
420 	struct pcmcia_socket *s;
421 	config_t *c;
422 
423 	s = p_dev->socket;
424 	c = CONFIG(p_dev);
425 	if (!(s->state & SOCKET_PRESENT))
426 		return CS_NO_CARD;
427 	if (!(c->state & CONFIG_LOCKED))
428 		return CS_CONFIGURATION_LOCKED;
429 
430 	if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
431 		if (mod->Attributes & CONF_ENABLE_IRQ) {
432 			c->Attributes |= CONF_ENABLE_IRQ;
433 			s->socket.io_irq = s->irq.AssignedIRQ;
434 		} else {
435 			c->Attributes &= ~CONF_ENABLE_IRQ;
436 			s->socket.io_irq = 0;
437 		}
438 		s->ops->set_socket(s, &s->socket);
439 	}
440 
441 	if (mod->Attributes & CONF_VCC_CHANGE_VALID)
442 		return CS_BAD_VCC;
443 
444 	/* We only allow changing Vpp1 and Vpp2 to the same value */
445 	if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
446 	    (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
447 		if (mod->Vpp1 != mod->Vpp2)
448 			return CS_BAD_VPP;
449 		c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
450 		if (s->ops->set_socket(s, &s->socket))
451 			return CS_BAD_VPP;
452 	} else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
453 		   (mod->Attributes & CONF_VPP2_CHANGE_VALID))
454 		return CS_BAD_VPP;
455 
456 	return CS_SUCCESS;
457 } /* modify_configuration */
458 EXPORT_SYMBOL(pcmcia_modify_configuration);
459 
460 
461 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
462 {
463 	pccard_io_map io = { 0, 0, 0, 0, 1 };
464 	struct pcmcia_socket *s = p_dev->socket;
465 	int i;
466 
467 	if (!(p_dev->state & CLIENT_CONFIG_LOCKED))
468 		return CS_BAD_HANDLE;
469 	p_dev->state &= ~CLIENT_CONFIG_LOCKED;
470 
471 	if (!(p_dev->state & CLIENT_STALE)) {
472 		config_t *c = CONFIG(p_dev);
473 		if (--(s->lock_count) == 0) {
474 			s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
475 			s->socket.Vpp = 0;
476 			s->socket.io_irq = 0;
477 			s->ops->set_socket(s, &s->socket);
478 		}
479 		if (c->state & CONFIG_IO_REQ)
480 			for (i = 0; i < MAX_IO_WIN; i++) {
481 				if (s->io[i].NumPorts == 0)
482 					continue;
483 				s->io[i].Config--;
484 				if (s->io[i].Config != 0)
485 					continue;
486 				io.map = i;
487 				s->ops->set_io_map(s, &io);
488 			}
489 		c->state &= ~CONFIG_LOCKED;
490 	}
491 
492 	return CS_SUCCESS;
493 } /* pcmcia_release_configuration */
494 EXPORT_SYMBOL(pcmcia_release_configuration);
495 
496 
497 /** pcmcia_release_io
498  *
499  * Release_io() releases the I/O ranges allocated by a client.  This
500  * may be invoked some time after a card ejection has already dumped
501  * the actual socket configuration, so if the client is "stale", we
502  * don't bother checking the port ranges against the current socket
503  * values.
504  */
505 int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
506 {
507 	struct pcmcia_socket *s = p_dev->socket;
508 
509 	if (!(p_dev->state & CLIENT_IO_REQ))
510 		return CS_BAD_HANDLE;
511 	p_dev->state &= ~CLIENT_IO_REQ;
512 
513 	if (!(p_dev->state & CLIENT_STALE)) {
514 		config_t *c = CONFIG(p_dev);
515 		if (c->state & CONFIG_LOCKED)
516 			return CS_CONFIGURATION_LOCKED;
517 		if ((c->io.BasePort1 != req->BasePort1) ||
518 		    (c->io.NumPorts1 != req->NumPorts1) ||
519 		    (c->io.BasePort2 != req->BasePort2) ||
520 		    (c->io.NumPorts2 != req->NumPorts2))
521 			return CS_BAD_ARGS;
522 		c->state &= ~CONFIG_IO_REQ;
523 	}
524 
525 	release_io_space(s, req->BasePort1, req->NumPorts1);
526 	if (req->NumPorts2)
527 		release_io_space(s, req->BasePort2, req->NumPorts2);
528 
529 	return CS_SUCCESS;
530 } /* pcmcia_release_io */
531 EXPORT_SYMBOL(pcmcia_release_io);
532 
533 
534 int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
535 {
536 	struct pcmcia_socket *s = p_dev->socket;
537 	if (!(p_dev->state & CLIENT_IRQ_REQ))
538 		return CS_BAD_HANDLE;
539 	p_dev->state &= ~CLIENT_IRQ_REQ;
540 
541 	if (!(p_dev->state & CLIENT_STALE)) {
542 		config_t *c = CONFIG(p_dev);
543 		if (c->state & CONFIG_LOCKED)
544 			return CS_CONFIGURATION_LOCKED;
545 		if (c->irq.Attributes != req->Attributes)
546 			return CS_BAD_ATTRIBUTE;
547 		if (s->irq.AssignedIRQ != req->AssignedIRQ)
548 			return CS_BAD_IRQ;
549 		if (--s->irq.Config == 0) {
550 			c->state &= ~CONFIG_IRQ_REQ;
551 			s->irq.AssignedIRQ = 0;
552 		}
553 	}
554 
555 	if (req->Attributes & IRQ_HANDLE_PRESENT) {
556 		free_irq(req->AssignedIRQ, req->Instance);
557 	}
558 
559 #ifdef CONFIG_PCMCIA_PROBE
560 	pcmcia_used_irq[req->AssignedIRQ]--;
561 #endif
562 
563 	return CS_SUCCESS;
564 } /* pcmcia_release_irq */
565 EXPORT_SYMBOL(pcmcia_release_irq);
566 
567 
568 int pcmcia_release_window(window_handle_t win)
569 {
570 	struct pcmcia_socket *s;
571 
572 	if ((win == NULL) || (win->magic != WINDOW_MAGIC))
573 		return CS_BAD_HANDLE;
574 	s = win->sock;
575 	if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
576 		return CS_BAD_HANDLE;
577 
578 	/* Shut down memory window */
579 	win->ctl.flags &= ~MAP_ACTIVE;
580 	s->ops->set_mem_map(s, &win->ctl);
581 	s->state &= ~SOCKET_WIN_REQ(win->index);
582 
583 	/* Release system memory */
584 	if (win->ctl.res) {
585 		release_resource(win->ctl.res);
586 		kfree(win->ctl.res);
587 		win->ctl.res = NULL;
588 	}
589 	win->handle->state &= ~CLIENT_WIN_REQ(win->index);
590 
591 	win->magic = 0;
592 
593 	return CS_SUCCESS;
594 } /* pcmcia_release_window */
595 EXPORT_SYMBOL(pcmcia_release_window);
596 
597 
598 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
599 				 config_req_t *req)
600 {
601 	int i;
602 	u_int base;
603 	struct pcmcia_socket *s = p_dev->socket;
604 	config_t *c;
605 	pccard_io_map iomap;
606 
607 	if (!(s->state & SOCKET_PRESENT))
608 		return CS_NO_CARD;
609 
610 	if (req->IntType & INT_CARDBUS)
611 		return CS_UNSUPPORTED_MODE;
612 	c = CONFIG(p_dev);
613 	if (c->state & CONFIG_LOCKED)
614 		return CS_CONFIGURATION_LOCKED;
615 
616 	/* Do power control.  We don't allow changes in Vcc. */
617 	if (s->socket.Vcc != req->Vcc)
618 		return CS_BAD_VCC;
619 	if (req->Vpp1 != req->Vpp2)
620 		return CS_BAD_VPP;
621 	s->socket.Vpp = req->Vpp1;
622 	if (s->ops->set_socket(s, &s->socket))
623 		return CS_BAD_VPP;
624 
625 	c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
626 
627 	/* Pick memory or I/O card, DMA mode, interrupt */
628 	c->IntType = req->IntType;
629 	c->Attributes = req->Attributes;
630 	if (req->IntType & INT_MEMORY_AND_IO)
631 		s->socket.flags |= SS_IOCARD;
632 	if (req->IntType & INT_ZOOMED_VIDEO)
633 		s->socket.flags |= SS_ZVCARD | SS_IOCARD;
634 	if (req->Attributes & CONF_ENABLE_DMA)
635 		s->socket.flags |= SS_DMA_MODE;
636 	if (req->Attributes & CONF_ENABLE_SPKR)
637 		s->socket.flags |= SS_SPKR_ENA;
638 	if (req->Attributes & CONF_ENABLE_IRQ)
639 		s->socket.io_irq = s->irq.AssignedIRQ;
640 	else
641 		s->socket.io_irq = 0;
642 	s->ops->set_socket(s, &s->socket);
643 	s->lock_count++;
644 
645 	/* Set up CIS configuration registers */
646 	base = c->ConfigBase = req->ConfigBase;
647 	c->Present = c->CardValues = req->Present;
648 	if (req->Present & PRESENT_COPY) {
649 		c->Copy = req->Copy;
650 		pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
651 	}
652 	if (req->Present & PRESENT_OPTION) {
653 		if (s->functions == 1) {
654 			c->Option = req->ConfigIndex & COR_CONFIG_MASK;
655 		} else {
656 			c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
657 			c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
658 			if (req->Present & PRESENT_IOBASE_0)
659 				c->Option |= COR_ADDR_DECODE;
660 		}
661 		if (c->state & CONFIG_IRQ_REQ)
662 			if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
663 				c->Option |= COR_LEVEL_REQ;
664 		pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
665 		mdelay(40);
666 	}
667 	if (req->Present & PRESENT_STATUS) {
668 		c->Status = req->Status;
669 		pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
670 	}
671 	if (req->Present & PRESENT_PIN_REPLACE) {
672 		c->Pin = req->Pin;
673 		pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
674 	}
675 	if (req->Present & PRESENT_EXT_STATUS) {
676 		c->ExtStatus = req->ExtStatus;
677 		pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
678 	}
679 	if (req->Present & PRESENT_IOBASE_0) {
680 		u_char b = c->io.BasePort1 & 0xff;
681 		pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
682 		b = (c->io.BasePort1 >> 8) & 0xff;
683 		pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
684 	}
685 	if (req->Present & PRESENT_IOSIZE) {
686 		u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
687 		pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
688 	}
689 
690 	/* Configure I/O windows */
691 	if (c->state & CONFIG_IO_REQ) {
692 		iomap.speed = io_speed;
693 		for (i = 0; i < MAX_IO_WIN; i++)
694 			if (s->io[i].NumPorts != 0) {
695 				iomap.map = i;
696 				iomap.flags = MAP_ACTIVE;
697 				switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
698 				case IO_DATA_PATH_WIDTH_16:
699 					iomap.flags |= MAP_16BIT; break;
700 				case IO_DATA_PATH_WIDTH_AUTO:
701 					iomap.flags |= MAP_AUTOSZ; break;
702 				default:
703 					break;
704 				}
705 				iomap.start = s->io[i].BasePort;
706 				iomap.stop = iomap.start + s->io[i].NumPorts - 1;
707 				s->ops->set_io_map(s, &iomap);
708 				s->io[i].Config++;
709 			}
710 	}
711 
712 	c->state |= CONFIG_LOCKED;
713 	p_dev->state |= CLIENT_CONFIG_LOCKED;
714 	return CS_SUCCESS;
715 } /* pcmcia_request_configuration */
716 EXPORT_SYMBOL(pcmcia_request_configuration);
717 
718 
719 /** pcmcia_request_io
720  *
721  * Request_io() reserves ranges of port addresses for a socket.
722  * I have not implemented range sharing or alias addressing.
723  */
724 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
725 {
726 	struct pcmcia_socket *s = p_dev->socket;
727 	config_t *c;
728 
729 	if (!(s->state & SOCKET_PRESENT))
730 		return CS_NO_CARD;
731 
732 	if (!req)
733 		return CS_UNSUPPORTED_MODE;
734 	c = CONFIG(p_dev);
735 	if (c->state & CONFIG_LOCKED)
736 		return CS_CONFIGURATION_LOCKED;
737 	if (c->state & CONFIG_IO_REQ)
738 		return CS_IN_USE;
739 	if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
740 		return CS_BAD_ATTRIBUTE;
741 	if ((req->NumPorts2 > 0) &&
742 	    (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
743 		return CS_BAD_ATTRIBUTE;
744 
745 	if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
746 			   req->NumPorts1, req->IOAddrLines))
747 		return CS_IN_USE;
748 
749 	if (req->NumPorts2) {
750 		if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
751 				   req->NumPorts2, req->IOAddrLines)) {
752 			release_io_space(s, req->BasePort1, req->NumPorts1);
753 			return CS_IN_USE;
754 		}
755 	}
756 
757 	c->io = *req;
758 	c->state |= CONFIG_IO_REQ;
759 	p_dev->state |= CLIENT_IO_REQ;
760 	return CS_SUCCESS;
761 } /* pcmcia_request_io */
762 EXPORT_SYMBOL(pcmcia_request_io);
763 
764 
765 /** pcmcia_request_irq
766  *
767  * Request_irq() reserves an irq for this client.
768  *
769  * Also, since Linux only reserves irq's when they are actually
770  * hooked, we don't guarantee that an irq will still be available
771  * when the configuration is locked.  Now that I think about it,
772  * there might be a way to fix this using a dummy handler.
773  */
774 
775 #ifdef CONFIG_PCMCIA_PROBE
776 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
777 {
778 	return IRQ_NONE;
779 }
780 #endif
781 
782 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
783 {
784 	struct pcmcia_socket *s = p_dev->socket;
785 	config_t *c;
786 	int ret = CS_IN_USE, irq = 0;
787 
788 	if (!(s->state & SOCKET_PRESENT))
789 		return CS_NO_CARD;
790 	c = CONFIG(p_dev);
791 	if (c->state & CONFIG_LOCKED)
792 		return CS_CONFIGURATION_LOCKED;
793 	if (c->state & CONFIG_IRQ_REQ)
794 		return CS_IN_USE;
795 
796 #ifdef CONFIG_PCMCIA_PROBE
797 	if (s->irq.AssignedIRQ != 0) {
798 		/* If the interrupt is already assigned, it must be the same */
799 		irq = s->irq.AssignedIRQ;
800 	} else {
801 		int try;
802 		u32 mask = s->irq_mask;
803 		void *data = NULL;
804 
805 		for (try = 0; try < 64; try++) {
806 			irq = try % 32;
807 
808 			/* marked as available by driver, and not blocked by userspace? */
809 			if (!((mask >> irq) & 1))
810 				continue;
811 
812 			/* avoid an IRQ which is already used by a PCMCIA card */
813 			if ((try < 32) && pcmcia_used_irq[irq])
814 				continue;
815 
816 			/* register the correct driver, if possible, of check whether
817 			 * registering a dummy handle works, i.e. if the IRQ isn't
818 			 * marked as used by the kernel resource management core */
819 			ret = request_irq(irq,
820 					  (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
821 					  ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
822 					   (s->functions > 1) ||
823 					   (irq == s->pci_irq)) ? SA_SHIRQ : 0,
824 					  p_dev->dev.bus_id,
825 					  (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
826 			if (!ret) {
827 				if (!(req->Attributes & IRQ_HANDLE_PRESENT))
828 					free_irq(irq, data);
829 				break;
830 			}
831 		}
832 	}
833 #endif
834 	if (ret) {
835 		if (!s->pci_irq)
836 			return ret;
837 		irq = s->pci_irq;
838 	}
839 
840 	if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
841 		if (request_irq(irq, req->Handler,
842 				((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
843 				 (s->functions > 1) ||
844 				 (irq == s->pci_irq)) ? SA_SHIRQ : 0,
845 				p_dev->dev.bus_id, req->Instance))
846 			return CS_IN_USE;
847 	}
848 
849 	c->irq.Attributes = req->Attributes;
850 	s->irq.AssignedIRQ = req->AssignedIRQ = irq;
851 	s->irq.Config++;
852 
853 	c->state |= CONFIG_IRQ_REQ;
854 	p_dev->state |= CLIENT_IRQ_REQ;
855 
856 #ifdef CONFIG_PCMCIA_PROBE
857 	pcmcia_used_irq[irq]++;
858 #endif
859 
860 	return CS_SUCCESS;
861 } /* pcmcia_request_irq */
862 EXPORT_SYMBOL(pcmcia_request_irq);
863 
864 
865 /** pcmcia_request_window
866  *
867  * Request_window() establishes a mapping between card memory space
868  * and system memory space.
869  */
870 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
871 {
872 	struct pcmcia_socket *s = (*p_dev)->socket;
873 	window_t *win;
874 	u_long align;
875 	int w;
876 
877 	if (!(s->state & SOCKET_PRESENT))
878 		return CS_NO_CARD;
879 	if (req->Attributes & (WIN_PAGED | WIN_SHARED))
880 		return CS_BAD_ATTRIBUTE;
881 
882 	/* Window size defaults to smallest available */
883 	if (req->Size == 0)
884 		req->Size = s->map_size;
885 	align = (((s->features & SS_CAP_MEM_ALIGN) ||
886 		  (req->Attributes & WIN_STRICT_ALIGN)) ?
887 		 req->Size : s->map_size);
888 	if (req->Size & (s->map_size-1))
889 		return CS_BAD_SIZE;
890 	if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
891 	    (req->Base & (align-1)))
892 		return CS_BAD_BASE;
893 	if (req->Base)
894 		align = 0;
895 
896 	/* Allocate system memory window */
897 	for (w = 0; w < MAX_WIN; w++)
898 		if (!(s->state & SOCKET_WIN_REQ(w))) break;
899 	if (w == MAX_WIN)
900 		return CS_OUT_OF_RESOURCE;
901 
902 	win = &s->win[w];
903 	win->magic = WINDOW_MAGIC;
904 	win->index = w;
905 	win->handle = *p_dev;
906 	win->sock = s;
907 
908 	if (!(s->features & SS_CAP_STATIC_MAP)) {
909 		win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
910 						      (req->Attributes & WIN_MAP_BELOW_1MB), s);
911 		if (!win->ctl.res)
912 			return CS_IN_USE;
913 	}
914 	(*p_dev)->state |= CLIENT_WIN_REQ(w);
915 
916 	/* Configure the socket controller */
917 	win->ctl.map = w+1;
918 	win->ctl.flags = 0;
919 	win->ctl.speed = req->AccessSpeed;
920 	if (req->Attributes & WIN_MEMORY_TYPE)
921 		win->ctl.flags |= MAP_ATTRIB;
922 	if (req->Attributes & WIN_ENABLE)
923 		win->ctl.flags |= MAP_ACTIVE;
924 	if (req->Attributes & WIN_DATA_WIDTH_16)
925 		win->ctl.flags |= MAP_16BIT;
926 	if (req->Attributes & WIN_USE_WAIT)
927 		win->ctl.flags |= MAP_USE_WAIT;
928 	win->ctl.card_start = 0;
929 	if (s->ops->set_mem_map(s, &win->ctl) != 0)
930 		return CS_BAD_ARGS;
931 	s->state |= SOCKET_WIN_REQ(w);
932 
933 	/* Return window handle */
934 	if (s->features & SS_CAP_STATIC_MAP) {
935 		req->Base = win->ctl.static_start;
936 	} else {
937 		req->Base = win->ctl.res->start;
938 	}
939 	*wh = win;
940 
941 	return CS_SUCCESS;
942 } /* pcmcia_request_window */
943 EXPORT_SYMBOL(pcmcia_request_window);
944