2 * PCMCIA 16-bit resource management functions
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.
8 * Copyright (C) 1999 David A. Hinds
9 * Copyright (C) 2004-2005 Dominik Brodowski
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.
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>
24 #define IN_CARD_SERVICES
25 #include <pcmcia/cs_types.h>
26 #include <pcmcia/ss.h>
27 #include <pcmcia/cs.h>
28 #include <pcmcia/bulkmem.h>
29 #include <pcmcia/cistpl.h>
30 #include <pcmcia/cisreg.h>
31 #include <pcmcia/ds.h>
33 #include "cs_internal.h"
34 #include "ds_internal.h"
37 /* Access speed for IO windows */
38 static int io_speed = 0;
39 module_param(io_speed, int, 0444);
42 #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];
50 extern int ds_pc_debug;
51 #define cs_socket_name(skt) ((skt)->dev.class_id)
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); \
59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
66 * Special stuff for managing IO windows, because they are scarce
69 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
70 ioaddr_t num, u_int lines)
73 kio_addr_t try, align;
75 align = (*base) ? (lines ? 1<<lines : 0) : 1;
76 if (align && (align < num)) {
78 ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
82 while (align && (align < num)) align <<= 1;
84 if (*base & ~(align-1)) {
85 ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
89 if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
90 *base = s->io_offset | (*base & 0x0fff);
91 s->io[0].res->flags = (s->io[0].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
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.
98 for (i = 0; i < MAX_IO_WIN; i++)
100 ((s->io[i].res->start & (align-1)) == *base))
102 for (i = 0; i < MAX_IO_WIN; i++) {
104 s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
106 *base = s->io[i].res->start;
107 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
108 s->io[i].InUse = num;
112 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
114 /* Try to extend top of window */
115 try = s->io[i].res->end + 1;
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) {
120 s->io[i].InUse += num;
123 /* Try to extend bottom of window */
124 try = s->io[i].res->start - num;
125 if ((*base == 0) || (*base == try))
126 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
127 s->io[i].res->end, s) == 0) {
129 s->io[i].InUse += num;
133 return (i == MAX_IO_WIN);
134 } /* alloc_io_space */
137 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
142 for (i = 0; i < MAX_IO_WIN; i++) {
145 if ((s->io[i].res->start <= base) &&
146 (s->io[i].res->end >= base+num-1)) {
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 release_resource(s->io[i].res);
156 } /* release_io_space */
159 /** pccard_access_configuration_register
161 * Access_configuration_register() reads and writes configuration
162 * registers in attribute memory. Memory window 0 is reserved for
163 * this and the tuple reading services.
166 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
169 struct pcmcia_socket *s;
174 if (!p_dev || !p_dev->function_config)
178 c = p_dev->function_config;
180 if (!(c->state & CONFIG_LOCKED))
181 return CS_CONFIGURATION_LOCKED;
183 addr = (c->ConfigBase + reg->Offset) >> 1;
185 switch (reg->Action) {
187 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
192 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
199 } /* pcmcia_access_configuration_register */
200 EXPORT_SYMBOL(pcmcia_access_configuration_register);
203 int pccard_get_configuration_info(struct pcmcia_socket *s,
204 struct pcmcia_device *p_dev,
205 config_info_t *config)
209 if (!(s->state & SOCKET_PRESENT))
212 config->Function = p_dev->func;
214 #ifdef CONFIG_CARDBUS
215 if (s->state & SOCKET_CARDBUS) {
216 memset(config, 0, sizeof(config_info_t));
217 config->Vcc = s->socket.Vcc;
218 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
219 config->Option = s->cb_dev->subordinate->number;
220 if (s->state & SOCKET_CARDBUS_CONFIG) {
221 config->Attributes = CONF_VALID_CLIENT;
222 config->IntType = INT_CARDBUS;
223 config->AssignedIRQ = s->irq.AssignedIRQ;
224 if (config->AssignedIRQ)
225 config->Attributes |= CONF_ENABLE_IRQ;
226 config->BasePort1 = s->io[0].res->start;
227 config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
233 c = (p_dev) ? p_dev->function_config : NULL;
235 if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
236 config->Attributes = 0;
237 config->Vcc = s->socket.Vcc;
238 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
242 /* !!! This is a hack !!! */
243 memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
244 config->Attributes |= CONF_VALID_CLIENT;
245 config->CardValues = c->CardValues;
246 config->IRQAttributes = c->irq.Attributes;
247 config->AssignedIRQ = s->irq.AssignedIRQ;
248 config->BasePort1 = c->io.BasePort1;
249 config->NumPorts1 = c->io.NumPorts1;
250 config->Attributes1 = c->io.Attributes1;
251 config->BasePort2 = c->io.BasePort2;
252 config->NumPorts2 = c->io.NumPorts2;
253 config->Attributes2 = c->io.Attributes2;
254 config->IOAddrLines = c->io.IOAddrLines;
257 } /* pccard_get_configuration_info */
259 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
260 config_info_t *config)
262 return pccard_get_configuration_info(p_dev->socket, p_dev,
265 EXPORT_SYMBOL(pcmcia_get_configuration_info);
268 /** pcmcia_get_window
270 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
271 int idx, win_req_t *req)
276 if (!s || !(s->state & SOCKET_PRESENT))
278 for (w = idx; w < MAX_WIN; w++)
279 if (s->state & SOCKET_WIN_REQ(w))
282 return CS_NO_MORE_ITEMS;
284 req->Base = win->ctl.res->start;
285 req->Size = win->ctl.res->end - win->ctl.res->start + 1;
286 req->AccessSpeed = win->ctl.speed;
288 if (win->ctl.flags & MAP_ATTRIB)
289 req->Attributes |= WIN_MEMORY_TYPE_AM;
290 if (win->ctl.flags & MAP_ACTIVE)
291 req->Attributes |= WIN_ENABLE;
292 if (win->ctl.flags & MAP_16BIT)
293 req->Attributes |= WIN_DATA_WIDTH_16;
294 if (win->ctl.flags & MAP_USE_WAIT)
295 req->Attributes |= WIN_USE_WAIT;
298 } /* pcmcia_get_window */
299 EXPORT_SYMBOL(pcmcia_get_window);
302 /** pccard_get_status
304 * Get the current socket state bits. We don't support the latched
305 * SocketState yet: I haven't seen any point for it.
308 int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev,
314 s->ops->get_status(s, &val);
315 status->CardState = status->SocketState = 0;
316 status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
317 status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
318 status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
319 status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
320 if (s->state & SOCKET_SUSPEND)
321 status->CardState |= CS_EVENT_PM_SUSPEND;
322 if (!(s->state & SOCKET_PRESENT))
325 c = (p_dev) ? p_dev->function_config : NULL;
327 if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
328 (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
330 if (c->CardValues & PRESENT_PIN_REPLACE) {
331 pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, ®);
333 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
335 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
337 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
339 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
341 /* No PRR? Then assume we're always ready */
342 status->CardState |= CS_EVENT_READY_CHANGE;
344 if (c->CardValues & PRESENT_EXT_STATUS) {
345 pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, ®);
347 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
352 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
354 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
356 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
358 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
360 } /* pccard_get_status */
362 int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status)
364 return pccard_get_status(p_dev->socket, p_dev, status);
366 EXPORT_SYMBOL(pcmcia_get_status);
370 /** pcmcia_get_mem_page
372 * Change the card address of an already open memory window.
374 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
376 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
377 return CS_BAD_HANDLE;
379 req->CardOffset = win->ctl.card_start;
381 } /* pcmcia_get_mem_page */
382 EXPORT_SYMBOL(pcmcia_get_mem_page);
385 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
387 struct pcmcia_socket *s;
388 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
389 return CS_BAD_HANDLE;
393 win->ctl.card_start = req->CardOffset;
394 if (s->ops->set_mem_map(s, &win->ctl) != 0)
395 return CS_BAD_OFFSET;
397 } /* pcmcia_map_mem_page */
398 EXPORT_SYMBOL(pcmcia_map_mem_page);
401 /** pcmcia_modify_configuration
403 * Modify a locked socket configuration
405 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
408 struct pcmcia_socket *s;
412 c = p_dev->function_config;
414 if (!(s->state & SOCKET_PRESENT))
416 if (!(c->state & CONFIG_LOCKED))
417 return CS_CONFIGURATION_LOCKED;
419 if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
420 if (mod->Attributes & CONF_ENABLE_IRQ) {
421 c->Attributes |= CONF_ENABLE_IRQ;
422 s->socket.io_irq = s->irq.AssignedIRQ;
424 c->Attributes &= ~CONF_ENABLE_IRQ;
425 s->socket.io_irq = 0;
427 s->ops->set_socket(s, &s->socket);
430 if (mod->Attributes & CONF_VCC_CHANGE_VALID)
433 /* We only allow changing Vpp1 and Vpp2 to the same value */
434 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
435 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
436 if (mod->Vpp1 != mod->Vpp2)
438 s->socket.Vpp = mod->Vpp1;
439 if (s->ops->set_socket(s, &s->socket))
441 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
442 (mod->Attributes & CONF_VPP2_CHANGE_VALID))
446 } /* modify_configuration */
447 EXPORT_SYMBOL(pcmcia_modify_configuration);
450 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
452 pccard_io_map io = { 0, 0, 0, 0, 1 };
453 struct pcmcia_socket *s = p_dev->socket;
454 config_t *c = p_dev->function_config;
457 if (p_dev->state & CLIENT_CONFIG_LOCKED) {
458 p_dev->state &= ~CLIENT_CONFIG_LOCKED;
459 if (--(s->lock_count) == 0) {
460 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
462 s->socket.io_irq = 0;
463 s->ops->set_socket(s, &s->socket);
466 if (c->state & CONFIG_LOCKED) {
467 c->state &= ~CONFIG_LOCKED;
468 if (c->state & CONFIG_IO_REQ)
469 for (i = 0; i < MAX_IO_WIN; i++) {
473 if (s->io[i].Config != 0)
476 s->ops->set_io_map(s, &io);
481 } /* pcmcia_release_configuration */
482 EXPORT_SYMBOL(pcmcia_release_configuration);
485 /** pcmcia_release_io
487 * Release_io() releases the I/O ranges allocated by a client. This
488 * may be invoked some time after a card ejection has already dumped
489 * the actual socket configuration, so if the client is "stale", we
490 * don't bother checking the port ranges against the current socket
493 int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
495 struct pcmcia_socket *s = p_dev->socket;
496 config_t *c = p_dev->function_config;
498 if (!(p_dev->state & CLIENT_IO_REQ))
499 return CS_BAD_HANDLE;
501 p_dev->state &= ~CLIENT_IO_REQ;
503 if ((c->io.BasePort1 != req->BasePort1) ||
504 (c->io.NumPorts1 != req->NumPorts1) ||
505 (c->io.BasePort2 != req->BasePort2) ||
506 (c->io.NumPorts2 != req->NumPorts2))
509 c->state &= ~CONFIG_IO_REQ;
511 release_io_space(s, req->BasePort1, req->NumPorts1);
513 release_io_space(s, req->BasePort2, req->NumPorts2);
516 } /* pcmcia_release_io */
517 EXPORT_SYMBOL(pcmcia_release_io);
520 int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
522 struct pcmcia_socket *s = p_dev->socket;
523 config_t *c= p_dev->function_config;
525 if (!(p_dev->state & CLIENT_IRQ_REQ))
526 return CS_BAD_HANDLE;
527 p_dev->state &= ~CLIENT_IRQ_REQ;
529 if (c->state & CONFIG_LOCKED)
530 return CS_CONFIGURATION_LOCKED;
531 if (c->irq.Attributes != req->Attributes)
532 return CS_BAD_ATTRIBUTE;
533 if (s->irq.AssignedIRQ != req->AssignedIRQ)
535 if (--s->irq.Config == 0) {
536 c->state &= ~CONFIG_IRQ_REQ;
537 s->irq.AssignedIRQ = 0;
540 if (req->Attributes & IRQ_HANDLE_PRESENT) {
541 free_irq(req->AssignedIRQ, req->Instance);
544 #ifdef CONFIG_PCMCIA_PROBE
545 pcmcia_used_irq[req->AssignedIRQ]--;
549 } /* pcmcia_release_irq */
550 EXPORT_SYMBOL(pcmcia_release_irq);
553 int pcmcia_release_window(window_handle_t win)
555 struct pcmcia_socket *s;
557 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
558 return CS_BAD_HANDLE;
560 if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
561 return CS_BAD_HANDLE;
563 /* Shut down memory window */
564 win->ctl.flags &= ~MAP_ACTIVE;
565 s->ops->set_mem_map(s, &win->ctl);
566 s->state &= ~SOCKET_WIN_REQ(win->index);
568 /* Release system memory */
570 release_resource(win->ctl.res);
574 win->handle->state &= ~CLIENT_WIN_REQ(win->index);
579 } /* pcmcia_release_window */
580 EXPORT_SYMBOL(pcmcia_release_window);
583 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
588 struct pcmcia_socket *s = p_dev->socket;
592 if (!(s->state & SOCKET_PRESENT))
595 if (req->IntType & INT_CARDBUS)
596 return CS_UNSUPPORTED_MODE;
597 c = p_dev->function_config;
598 if (c->state & CONFIG_LOCKED)
599 return CS_CONFIGURATION_LOCKED;
601 /* Do power control. We don't allow changes in Vcc. */
602 if (s->socket.Vcc != req->Vcc)
604 if (req->Vpp1 != req->Vpp2)
606 s->socket.Vpp = req->Vpp1;
607 if (s->ops->set_socket(s, &s->socket))
610 /* Pick memory or I/O card, DMA mode, interrupt */
611 c->IntType = req->IntType;
612 c->Attributes = req->Attributes;
613 if (req->IntType & INT_MEMORY_AND_IO)
614 s->socket.flags |= SS_IOCARD;
615 if (req->IntType & INT_ZOOMED_VIDEO)
616 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
617 if (req->Attributes & CONF_ENABLE_DMA)
618 s->socket.flags |= SS_DMA_MODE;
619 if (req->Attributes & CONF_ENABLE_SPKR)
620 s->socket.flags |= SS_SPKR_ENA;
621 if (req->Attributes & CONF_ENABLE_IRQ)
622 s->socket.io_irq = s->irq.AssignedIRQ;
624 s->socket.io_irq = 0;
625 s->ops->set_socket(s, &s->socket);
628 /* Set up CIS configuration registers */
629 base = c->ConfigBase = req->ConfigBase;
630 c->CardValues = req->Present;
631 if (req->Present & PRESENT_COPY) {
633 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
635 if (req->Present & PRESENT_OPTION) {
636 if (s->functions == 1) {
637 c->Option = req->ConfigIndex & COR_CONFIG_MASK;
639 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
640 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
641 if (req->Present & PRESENT_IOBASE_0)
642 c->Option |= COR_ADDR_DECODE;
644 if (c->state & CONFIG_IRQ_REQ)
645 if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
646 c->Option |= COR_LEVEL_REQ;
647 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
650 if (req->Present & PRESENT_STATUS) {
651 c->Status = req->Status;
652 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
654 if (req->Present & PRESENT_PIN_REPLACE) {
656 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
658 if (req->Present & PRESENT_EXT_STATUS) {
659 c->ExtStatus = req->ExtStatus;
660 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
662 if (req->Present & PRESENT_IOBASE_0) {
663 u_char b = c->io.BasePort1 & 0xff;
664 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
665 b = (c->io.BasePort1 >> 8) & 0xff;
666 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
668 if (req->Present & PRESENT_IOSIZE) {
669 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
670 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
673 /* Configure I/O windows */
674 if (c->state & CONFIG_IO_REQ) {
675 iomap.speed = io_speed;
676 for (i = 0; i < MAX_IO_WIN; i++)
679 iomap.flags = MAP_ACTIVE;
680 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
681 case IO_DATA_PATH_WIDTH_16:
682 iomap.flags |= MAP_16BIT; break;
683 case IO_DATA_PATH_WIDTH_AUTO:
684 iomap.flags |= MAP_AUTOSZ; break;
688 iomap.start = s->io[i].res->start;
689 iomap.stop = s->io[i].res->end;
690 s->ops->set_io_map(s, &iomap);
695 c->state |= CONFIG_LOCKED;
696 p_dev->state |= CLIENT_CONFIG_LOCKED;
698 } /* pcmcia_request_configuration */
699 EXPORT_SYMBOL(pcmcia_request_configuration);
702 /** pcmcia_request_io
704 * Request_io() reserves ranges of port addresses for a socket.
705 * I have not implemented range sharing or alias addressing.
707 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
709 struct pcmcia_socket *s = p_dev->socket;
712 if (!(s->state & SOCKET_PRESENT))
716 return CS_UNSUPPORTED_MODE;
717 c = p_dev->function_config;
718 if (c->state & CONFIG_LOCKED)
719 return CS_CONFIGURATION_LOCKED;
720 if (c->state & CONFIG_IO_REQ)
722 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
723 return CS_BAD_ATTRIBUTE;
724 if ((req->NumPorts2 > 0) &&
725 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
726 return CS_BAD_ATTRIBUTE;
728 if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
729 req->NumPorts1, req->IOAddrLines))
732 if (req->NumPorts2) {
733 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
734 req->NumPorts2, req->IOAddrLines)) {
735 release_io_space(s, req->BasePort1, req->NumPorts1);
741 c->state |= CONFIG_IO_REQ;
742 p_dev->state |= CLIENT_IO_REQ;
744 } /* pcmcia_request_io */
745 EXPORT_SYMBOL(pcmcia_request_io);
748 /** pcmcia_request_irq
750 * Request_irq() reserves an irq for this client.
752 * Also, since Linux only reserves irq's when they are actually
753 * hooked, we don't guarantee that an irq will still be available
754 * when the configuration is locked. Now that I think about it,
755 * there might be a way to fix this using a dummy handler.
758 #ifdef CONFIG_PCMCIA_PROBE
759 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
765 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
767 struct pcmcia_socket *s = p_dev->socket;
769 int ret = CS_IN_USE, irq = 0;
771 if (!(s->state & SOCKET_PRESENT))
773 c = p_dev->function_config;
774 if (c->state & CONFIG_LOCKED)
775 return CS_CONFIGURATION_LOCKED;
776 if (c->state & CONFIG_IRQ_REQ)
779 #ifdef CONFIG_PCMCIA_PROBE
780 if (s->irq.AssignedIRQ != 0) {
781 /* If the interrupt is already assigned, it must be the same */
782 irq = s->irq.AssignedIRQ;
785 u32 mask = s->irq_mask;
786 void *data = &p_dev->dev.driver; /* something unique to this device */
788 for (try = 0; try < 64; try++) {
791 /* marked as available by driver, and not blocked by userspace? */
792 if (!((mask >> irq) & 1))
795 /* avoid an IRQ which is already used by a PCMCIA card */
796 if ((try < 32) && pcmcia_used_irq[irq])
799 /* register the correct driver, if possible, of check whether
800 * registering a dummy handle works, i.e. if the IRQ isn't
801 * marked as used by the kernel resource management core */
802 ret = request_irq(irq,
803 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
804 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
805 (s->functions > 1) ||
806 (irq == s->pci_irq)) ? SA_SHIRQ : 0,
808 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
810 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
817 /* only assign PCI irq if no IRQ already assigned */
818 if (ret && !s->irq.AssignedIRQ) {
824 if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
825 if (request_irq(irq, req->Handler,
826 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
827 (s->functions > 1) ||
828 (irq == s->pci_irq)) ? SA_SHIRQ : 0,
829 p_dev->devname, req->Instance))
833 c->irq.Attributes = req->Attributes;
834 s->irq.AssignedIRQ = req->AssignedIRQ = irq;
837 c->state |= CONFIG_IRQ_REQ;
838 p_dev->state |= CLIENT_IRQ_REQ;
840 #ifdef CONFIG_PCMCIA_PROBE
841 pcmcia_used_irq[irq]++;
845 } /* pcmcia_request_irq */
846 EXPORT_SYMBOL(pcmcia_request_irq);
849 /** pcmcia_request_window
851 * Request_window() establishes a mapping between card memory space
852 * and system memory space.
854 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
856 struct pcmcia_socket *s = (*p_dev)->socket;
861 if (!(s->state & SOCKET_PRESENT))
863 if (req->Attributes & (WIN_PAGED | WIN_SHARED))
864 return CS_BAD_ATTRIBUTE;
866 /* Window size defaults to smallest available */
868 req->Size = s->map_size;
869 align = (((s->features & SS_CAP_MEM_ALIGN) ||
870 (req->Attributes & WIN_STRICT_ALIGN)) ?
871 req->Size : s->map_size);
872 if (req->Size & (s->map_size-1))
874 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
875 (req->Base & (align-1)))
880 /* Allocate system memory window */
881 for (w = 0; w < MAX_WIN; w++)
882 if (!(s->state & SOCKET_WIN_REQ(w))) break;
884 return CS_OUT_OF_RESOURCE;
887 win->magic = WINDOW_MAGIC;
889 win->handle = *p_dev;
892 if (!(s->features & SS_CAP_STATIC_MAP)) {
893 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
894 (req->Attributes & WIN_MAP_BELOW_1MB), s);
898 (*p_dev)->state |= CLIENT_WIN_REQ(w);
900 /* Configure the socket controller */
903 win->ctl.speed = req->AccessSpeed;
904 if (req->Attributes & WIN_MEMORY_TYPE)
905 win->ctl.flags |= MAP_ATTRIB;
906 if (req->Attributes & WIN_ENABLE)
907 win->ctl.flags |= MAP_ACTIVE;
908 if (req->Attributes & WIN_DATA_WIDTH_16)
909 win->ctl.flags |= MAP_16BIT;
910 if (req->Attributes & WIN_USE_WAIT)
911 win->ctl.flags |= MAP_USE_WAIT;
912 win->ctl.card_start = 0;
913 if (s->ops->set_mem_map(s, &win->ctl) != 0)
915 s->state |= SOCKET_WIN_REQ(w);
917 /* Return window handle */
918 if (s->features & SS_CAP_STATIC_MAP) {
919 req->Base = win->ctl.static_start;
921 req->Base = win->ctl.res->start;
926 } /* pcmcia_request_window */
927 EXPORT_SYMBOL(pcmcia_request_window);
929 void pcmcia_disable_device(struct pcmcia_device *p_dev) {
930 if (!p_dev->instance)
933 pcmcia_release_configuration(p_dev);
934 pcmcia_release_io(p_dev, &p_dev->instance->io);
935 pcmcia_release_irq(p_dev, &p_dev->instance->irq);
936 if (&p_dev->instance->win)
937 pcmcia_release_window(p_dev->instance->win);
939 p_dev->instance->dev = NULL;
940 p_dev->instance->state &= ~DEV_CONFIG;
942 EXPORT_SYMBOL(pcmcia_disable_device);