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