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) 2004-2010 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>
23 #include <linux/netdevice.h>
24 #include <linux/slab.h>
28 #include <pcmcia/ss.h>
29 #include <pcmcia/cistpl.h>
30 #include <pcmcia/cisreg.h>
31 #include <pcmcia/ds.h>
33 #include "cs_internal.h"
36 /* Access speed for IO windows */
38 module_param(io_speed, int, 0444);
41 int pcmcia_validate_mem(struct pcmcia_socket *s)
43 if (s->resource_ops->validate_mem)
44 return s->resource_ops->validate_mem(s);
45 /* if there is no callback, we can assume that everything is OK */
49 struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
50 int low, struct pcmcia_socket *s)
52 if (s->resource_ops->find_mem)
53 return s->resource_ops->find_mem(base, num, align, low, s);
59 * release_io_space() - release IO ports allocated with alloc_io_space()
61 * @res: resource to release
64 static void release_io_space(struct pcmcia_socket *s, struct resource *res)
66 resource_size_t num = resource_size(res);
69 dev_dbg(&s->dev, "release_io_space for %pR\n", res);
71 for (i = 0; i < MAX_IO_WIN; i++) {
74 if ((s->io[i].res->start <= res->start) &&
75 (s->io[i].res->end >= res->end)) {
76 s->io[i].InUse -= num;
78 release_resource(res);
79 res->start = res->end = 0;
80 res->flags = IORESOURCE_IO;
81 /* Free the window if no one else is using it */
82 if (s->io[i].InUse == 0) {
83 release_resource(s->io[i].res);
93 * alloc_io_space() - allocate IO ports for use by a PCMCIA device
95 * @res: resource to allocate (begin: begin, end: size)
96 * @lines: number of IO lines decoded by the PCMCIA card
98 * Special stuff for managing IO windows, because they are scarce
100 static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
104 unsigned int base = res->start;
105 unsigned int num = res->end;
108 res->flags |= IORESOURCE_IO;
110 dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n",
113 align = base ? (lines ? 1<<lines : 0) : 1;
114 if (align && (align < num)) {
116 dev_dbg(&s->dev, "odd IO request\n");
119 while (align && (align < num))
122 if (base & ~(align-1)) {
123 dev_dbg(&s->dev, "odd IO request\n");
127 ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
130 dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
135 res->end = res->start + num - 1;
138 ret = request_resource(res->parent, res);
141 "request_resource %pR failed: %d\n", res, ret);
143 release_io_space(s, res);
146 dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
152 * pcmcia_access_config() - read or write card configuration registers
154 * pcmcia_access_config() reads and writes configuration registers in
155 * attribute memory. Memory window 0 is reserved for this and the tuple
156 * reading services. Drivers must use pcmcia_read_config_byte() or
157 * pcmcia_write_config_byte().
159 static int pcmcia_access_config(struct pcmcia_device *p_dev,
160 off_t where, u8 *val,
161 int (*accessf) (struct pcmcia_socket *s,
162 int attr, unsigned int addr,
163 unsigned int len, void *ptr))
165 struct pcmcia_socket *s;
172 mutex_lock(&s->ops_mutex);
173 c = p_dev->function_config;
175 if (!(c->state & CONFIG_LOCKED)) {
176 dev_dbg(&p_dev->dev, "Configuration isn't locked\n");
177 mutex_unlock(&s->ops_mutex);
181 addr = (p_dev->config_base + where) >> 1;
183 ret = accessf(s, 1, addr, 1, val);
185 mutex_unlock(&s->ops_mutex);
192 * pcmcia_read_config_byte() - read a byte from a card configuration register
194 * pcmcia_read_config_byte() reads a byte from a configuration register in
197 int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
199 return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem);
201 EXPORT_SYMBOL(pcmcia_read_config_byte);
205 * pcmcia_write_config_byte() - write a byte to a card configuration register
207 * pcmcia_write_config_byte() writes a byte to a configuration register in
210 int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val)
212 return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem);
214 EXPORT_SYMBOL(pcmcia_write_config_byte);
218 * pcmcia_map_mem_page() - modify iomem window to point to a different offset
219 * @p_dev: pcmcia device
220 * @res: iomem resource already enabled by pcmcia_request_window()
221 * @offset: card_offset to map
223 * pcmcia_map_mem_page() modifies what can be read and written by accessing
224 * an iomem range previously enabled by pcmcia_request_window(), by setting
225 * the card_offset value to @offset.
227 int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res,
230 struct pcmcia_socket *s = p_dev->socket;
234 w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
238 mutex_lock(&s->ops_mutex);
239 s->win[w].card_start = offset;
240 ret = s->ops->set_mem_map(s, &s->win[w]);
242 dev_warn(&p_dev->dev, "failed to set_mem_map\n");
243 mutex_unlock(&s->ops_mutex);
246 EXPORT_SYMBOL(pcmcia_map_mem_page);
250 * pcmcia_fixup_iowidth() - reduce io width to 8bit
251 * @p_dev: pcmcia device
253 * pcmcia_fixup_iowidth() allows a PCMCIA device driver to reduce the
254 * IO width to 8bit after having called pcmcia_enable_device()
257 int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev)
259 struct pcmcia_socket *s = p_dev->socket;
260 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
264 mutex_lock(&s->ops_mutex);
266 dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n");
268 if (!(s->state & SOCKET_PRESENT) ||
269 !(p_dev->function_config->state & CONFIG_LOCKED)) {
270 dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
275 io_on.speed = io_speed;
276 for (i = 0; i < MAX_IO_WIN; i++) {
282 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
283 io_on.start = s->io[i].res->start;
284 io_on.stop = s->io[i].res->end;
286 s->ops->set_io_map(s, &io_off);
288 s->ops->set_io_map(s, &io_on);
291 mutex_unlock(&s->ops_mutex);
295 EXPORT_SYMBOL(pcmcia_fixup_iowidth);
299 * pcmcia_fixup_vpp() - set Vpp to a new voltage level
300 * @p_dev: pcmcia device
301 * @new_vpp: new Vpp voltage
303 * pcmcia_fixup_vpp() allows a PCMCIA device driver to set Vpp to
304 * a new voltage level between calls to pcmcia_enable_device()
305 * and pcmcia_disable_device().
307 int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp)
309 struct pcmcia_socket *s = p_dev->socket;
312 mutex_lock(&s->ops_mutex);
314 dev_dbg(&p_dev->dev, "fixup Vpp to %d\n", new_vpp);
316 if (!(s->state & SOCKET_PRESENT) ||
317 !(p_dev->function_config->state & CONFIG_LOCKED)) {
318 dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
323 s->socket.Vpp = new_vpp;
324 if (s->ops->set_socket(s, &s->socket)) {
325 dev_warn(&p_dev->dev, "Unable to set VPP\n");
329 p_dev->vpp = new_vpp;
332 mutex_unlock(&s->ops_mutex);
336 EXPORT_SYMBOL(pcmcia_fixup_vpp);
340 * pcmcia_release_configuration() - physically disable a PCMCIA device
341 * @p_dev: pcmcia device
343 * pcmcia_release_configuration() is the 1:1 counterpart to
344 * pcmcia_enable_device(): If a PCMCIA device is no longer used by any
345 * driver, the Vpp voltage is set to 0, IRQs will no longer be generated,
346 * and I/O ranges will be disabled. As pcmcia_release_io() and
347 * pcmcia_release_window() still need to be called, device drivers are
348 * expected to call pcmcia_disable_device() instead.
350 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
352 pccard_io_map io = { 0, 0, 0, 0, 1 };
353 struct pcmcia_socket *s = p_dev->socket;
357 mutex_lock(&s->ops_mutex);
358 c = p_dev->function_config;
359 if (p_dev->_locked) {
361 if (--(s->lock_count) == 0) {
362 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
364 s->socket.io_irq = 0;
365 s->ops->set_socket(s, &s->socket);
368 if (c->state & CONFIG_LOCKED) {
369 c->state &= ~CONFIG_LOCKED;
370 if (c->state & CONFIG_IO_REQ)
371 for (i = 0; i < MAX_IO_WIN; i++) {
375 if (s->io[i].Config != 0)
378 s->ops->set_io_map(s, &io);
381 mutex_unlock(&s->ops_mutex);
388 * pcmcia_release_io() - release I/O allocated by a PCMCIA device
389 * @p_dev: pcmcia device
391 * pcmcia_release_io() releases the I/O ranges allocated by a PCMCIA
392 * device. This may be invoked some time after a card ejection has
393 * already dumped the actual socket configuration, so if the client is
394 * "stale", we don't bother checking the port ranges against the
395 * current socket values.
397 static int pcmcia_release_io(struct pcmcia_device *p_dev)
399 struct pcmcia_socket *s = p_dev->socket;
403 mutex_lock(&s->ops_mutex);
407 c = p_dev->function_config;
409 release_io_space(s, &c->io[0]);
412 release_io_space(s, &c->io[1]);
415 c->state &= ~CONFIG_IO_REQ;
418 mutex_unlock(&s->ops_mutex);
421 } /* pcmcia_release_io */
425 * pcmcia_release_window() - release reserved iomem for PCMCIA devices
426 * @p_dev: pcmcia device
427 * @res: iomem resource to release
429 * pcmcia_release_window() releases &struct resource *res which was
430 * previously reserved by calling pcmcia_request_window().
432 int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
434 struct pcmcia_socket *s = p_dev->socket;
438 dev_dbg(&p_dev->dev, "releasing window %pR\n", res);
440 w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
444 mutex_lock(&s->ops_mutex);
447 if (!(p_dev->_win & CLIENT_WIN_REQ(w))) {
448 dev_dbg(&p_dev->dev, "not releasing unknown window\n");
449 mutex_unlock(&s->ops_mutex);
453 /* Shut down memory window */
454 win->flags &= ~MAP_ACTIVE;
455 s->ops->set_mem_map(s, win);
456 s->state &= ~SOCKET_WIN_REQ(w);
458 /* Release system memory */
460 release_resource(res);
461 release_resource(win->res);
465 res->start = res->end = 0;
466 res->flags = IORESOURCE_MEM;
467 p_dev->_win &= ~CLIENT_WIN_REQ(w);
468 mutex_unlock(&s->ops_mutex);
471 } /* pcmcia_release_window */
472 EXPORT_SYMBOL(pcmcia_release_window);
476 * pcmcia_enable_device() - set up and activate a PCMCIA device
477 * @p_dev: the associated PCMCIA device
479 * pcmcia_enable_device() physically enables a PCMCIA device. It parses
480 * the flags passed to in @flags and stored in @p_dev->flags and sets up
481 * the Vpp voltage, enables the speaker line, I/O ports and store proper
482 * values to configuration registers.
484 int pcmcia_enable_device(struct pcmcia_device *p_dev)
488 struct pcmcia_socket *s = p_dev->socket;
491 unsigned char status = 0;
492 unsigned char ext_status = 0;
493 unsigned char option = 0;
494 unsigned int flags = p_dev->config_flags;
496 if (!(s->state & SOCKET_PRESENT))
499 mutex_lock(&s->ops_mutex);
500 c = p_dev->function_config;
501 if (c->state & CONFIG_LOCKED) {
502 mutex_unlock(&s->ops_mutex);
503 dev_dbg(&p_dev->dev, "Configuration is locked\n");
507 /* Do power control. We don't allow changes in Vcc. */
508 s->socket.Vpp = p_dev->vpp;
509 if (s->ops->set_socket(s, &s->socket)) {
510 mutex_unlock(&s->ops_mutex);
511 dev_printk(KERN_WARNING, &p_dev->dev,
512 "Unable to set socket state\n");
516 /* Pick memory or I/O card, DMA mode, interrupt */
517 if (p_dev->_io || flags & CONF_ENABLE_IRQ)
518 flags |= CONF_ENABLE_IOCARD;
519 if (flags & CONF_ENABLE_IOCARD)
520 s->socket.flags |= SS_IOCARD;
521 if (flags & CONF_ENABLE_ZVCARD)
522 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
523 if (flags & CONF_ENABLE_SPKR) {
524 s->socket.flags |= SS_SPKR_ENA;
525 status = CCSR_AUDIO_ENA;
526 if (!(p_dev->config_regs & PRESENT_STATUS))
527 dev_warn(&p_dev->dev, "speaker requested, but "
528 "PRESENT_STATUS not set!\n");
530 if (flags & CONF_ENABLE_IRQ)
531 s->socket.io_irq = s->pcmcia_irq;
533 s->socket.io_irq = 0;
534 if (flags & CONF_ENABLE_ESR) {
535 p_dev->config_regs |= PRESENT_EXT_STATUS;
536 ext_status = ESR_REQ_ATTN_ENA;
538 s->ops->set_socket(s, &s->socket);
542 "enable_device: V %d, flags %x, base %x, regs %x, idx %x\n",
543 p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs,
544 p_dev->config_index);
546 /* Set up CIS configuration registers */
547 base = p_dev->config_base;
548 if (p_dev->config_regs & PRESENT_COPY) {
550 dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n");
551 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &tmp);
553 if (p_dev->config_regs & PRESENT_PIN_REPLACE) {
555 dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n");
556 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &tmp);
558 if (p_dev->config_regs & PRESENT_OPTION) {
559 if (s->functions == 1) {
560 option = p_dev->config_index & COR_CONFIG_MASK;
562 option = p_dev->config_index & COR_MFC_CONFIG_MASK;
563 option |= COR_FUNC_ENA|COR_IREQ_ENA;
564 if (p_dev->config_regs & PRESENT_IOBASE_0)
565 option |= COR_ADDR_DECODE;
567 if ((flags & CONF_ENABLE_IRQ) &&
568 !(flags & CONF_ENABLE_PULSE_IRQ))
569 option |= COR_LEVEL_REQ;
570 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &option);
573 if (p_dev->config_regs & PRESENT_STATUS)
574 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &status);
576 if (p_dev->config_regs & PRESENT_EXT_STATUS)
577 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1,
580 if (p_dev->config_regs & PRESENT_IOBASE_0) {
581 u8 b = c->io[0].start & 0xff;
582 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
583 b = (c->io[0].start >> 8) & 0xff;
584 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
586 if (p_dev->config_regs & PRESENT_IOSIZE) {
587 u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1;
588 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
591 /* Configure I/O windows */
592 if (c->state & CONFIG_IO_REQ) {
593 iomap.speed = io_speed;
594 for (i = 0; i < MAX_IO_WIN; i++)
597 iomap.flags = MAP_ACTIVE;
598 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
599 case IO_DATA_PATH_WIDTH_16:
600 iomap.flags |= MAP_16BIT; break;
601 case IO_DATA_PATH_WIDTH_AUTO:
602 iomap.flags |= MAP_AUTOSZ; break;
606 iomap.start = s->io[i].res->start;
607 iomap.stop = s->io[i].res->end;
608 s->ops->set_io_map(s, &iomap);
613 c->state |= CONFIG_LOCKED;
615 mutex_unlock(&s->ops_mutex);
617 } /* pcmcia_enable_device */
618 EXPORT_SYMBOL(pcmcia_enable_device);
622 * pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices
623 * @p_dev: the associated PCMCIA device
625 * pcmcia_request_io() attempts to reserve the IO port ranges specified in
626 * &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The
627 * "start" value is the requested start of the IO port resource; "end"
628 * reflects the number of ports requested. The number of IO lines requested
629 * is specified in &struct pcmcia_device @p_dev->io_lines.
631 int pcmcia_request_io(struct pcmcia_device *p_dev)
633 struct pcmcia_socket *s = p_dev->socket;
634 config_t *c = p_dev->function_config;
637 mutex_lock(&s->ops_mutex);
638 dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR",
639 &c->io[0], &c->io[1]);
641 if (!(s->state & SOCKET_PRESENT)) {
642 dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n");
646 if (c->state & CONFIG_LOCKED) {
647 dev_dbg(&p_dev->dev, "Configuration is locked\n");
650 if (c->state & CONFIG_IO_REQ) {
651 dev_dbg(&p_dev->dev, "IO already configured\n");
655 ret = alloc_io_space(s, &c->io[0], p_dev->io_lines);
660 ret = alloc_io_space(s, &c->io[1], p_dev->io_lines);
662 struct resource tmp = c->io[0];
663 /* release the previously allocated resource */
664 release_io_space(s, &c->io[0]);
665 /* but preserve the settings, for they worked... */
666 c->io[0].end = resource_size(&tmp);
667 c->io[0].start = tmp.start;
668 c->io[0].flags = tmp.flags;
674 c->state |= CONFIG_IO_REQ;
677 dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR",
678 &c->io[0], &c->io[1]);
680 mutex_unlock(&s->ops_mutex);
683 } /* pcmcia_request_io */
684 EXPORT_SYMBOL(pcmcia_request_io);
688 * pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device
689 * @p_dev: the associated PCMCIA device
690 * @handler: IRQ handler to register
692 * pcmcia_request_irq() is a wrapper around request_irq() which allows
693 * the PCMCIA core to clean up the registration in pcmcia_disable_device().
694 * Drivers are free to use request_irq() directly, but then they need to
695 * call free_irq() themselfves, too. Also, only %IRQF_SHARED capable IRQ
696 * handlers are allowed.
698 int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev,
699 irq_handler_t handler)
706 ret = request_irq(p_dev->irq, handler, IRQF_SHARED,
707 p_dev->devname, p_dev->priv);
713 EXPORT_SYMBOL(pcmcia_request_irq);
717 * pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first
718 * @p_dev: the associated PCMCIA device
719 * @handler: IRQ handler to register
721 * pcmcia_request_exclusive_irq() is a wrapper around request_irq() which
722 * attempts first to request an exclusive IRQ. If it fails, it also accepts
723 * a shared IRQ, but prints out a warning. PCMCIA drivers should allow for
724 * IRQ sharing and either use request_irq directly (then they need to call
725 * free_irq() themselves, too), or the pcmcia_request_irq() function.
728 __pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev,
729 irq_handler_t handler)
736 ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv);
738 ret = pcmcia_request_irq(p_dev, handler);
739 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
740 "request for exclusive IRQ could not be fulfilled.\n");
741 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
742 "needs updating to supported shared IRQ lines.\n");
745 dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n");
750 } /* pcmcia_request_exclusive_irq */
751 EXPORT_SYMBOL(__pcmcia_request_exclusive_irq);
754 #ifdef CONFIG_PCMCIA_PROBE
756 /* mask of IRQs already reserved by other cards, we should avoid using them */
757 static u8 pcmcia_used_irq[32];
759 static irqreturn_t test_action(int cpl, void *dev_id)
765 * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
766 * @p_dev - the associated PCMCIA device
768 * locking note: must be called with ops_mutex locked.
770 static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
772 struct pcmcia_socket *s = p_dev->socket;
773 unsigned int try, irq;
774 u32 mask = s->irq_mask;
777 for (try = 0; try < 64; try++) {
783 /* marked as available by driver, not blocked by userspace? */
784 if (!((mask >> irq) & 1))
787 /* avoid an IRQ which is already used by another PCMCIA card */
788 if ((try < 32) && pcmcia_used_irq[irq])
791 /* register the correct driver, if possible, to check whether
792 * registering a dummy handle works, i.e. if the IRQ isn't
793 * marked as used by the kernel resource management core */
794 ret = request_irq(irq, test_action, type, p_dev->devname,
797 free_irq(irq, p_dev);
798 p_dev->irq = s->pcmcia_irq = irq;
799 pcmcia_used_irq[irq]++;
807 void pcmcia_cleanup_irq(struct pcmcia_socket *s)
809 pcmcia_used_irq[s->pcmcia_irq]--;
813 #else /* CONFIG_PCMCIA_PROBE */
815 static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
820 void pcmcia_cleanup_irq(struct pcmcia_socket *s)
826 #endif /* CONFIG_PCMCIA_PROBE */
830 * pcmcia_setup_irq() - determine IRQ to be used for device
831 * @p_dev - the associated PCMCIA device
833 * locking note: must be called with ops_mutex locked.
835 int pcmcia_setup_irq(struct pcmcia_device *p_dev)
837 struct pcmcia_socket *s = p_dev->socket;
842 /* already assigned? */
844 p_dev->irq = s->pcmcia_irq;
848 /* prefer an exclusive ISA irq */
849 if (!pcmcia_setup_isa_irq(p_dev, 0))
852 /* but accept a shared ISA irq */
853 if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED))
856 /* but use the PCI irq otherwise */
858 p_dev->irq = s->pcmcia_irq = s->pci_irq;
867 * pcmcia_request_window() - attempt to reserve iomem for PCMCIA devices
868 * @p_dev: the associated PCMCIA device
869 * @res: &struct resource pointing to p_dev->resource[2..5]
870 * @speed: access speed
872 * pcmcia_request_window() attepts to reserve an iomem ranges specified in
873 * &struct resource @res pointing to one of the entries in
874 * &struct pcmcia_device @p_dev->resource[2..5]. The "start" value is the
875 * requested start of the IO mem resource; "end" reflects the size
878 int pcmcia_request_window(struct pcmcia_device *p_dev, struct resource *res,
881 struct pcmcia_socket *s = p_dev->socket;
886 dev_dbg(&p_dev->dev, "request_window %pR %d\n", res, speed);
888 if (!(s->state & SOCKET_PRESENT)) {
889 dev_dbg(&p_dev->dev, "No card present\n");
893 /* Window size defaults to smallest available */
895 res->end = s->map_size;
896 align = (s->features & SS_CAP_MEM_ALIGN) ? res->end : s->map_size;
897 if (res->end & (s->map_size-1)) {
898 dev_dbg(&p_dev->dev, "invalid map size\n");
901 if ((res->start && (s->features & SS_CAP_STATIC_MAP)) ||
902 (res->start & (align-1))) {
903 dev_dbg(&p_dev->dev, "invalid base address\n");
909 /* Allocate system memory window */
910 mutex_lock(&s->ops_mutex);
911 for (w = 0; w < MAX_WIN; w++)
912 if (!(s->state & SOCKET_WIN_REQ(w)))
915 dev_dbg(&p_dev->dev, "all windows are used already\n");
916 mutex_unlock(&s->ops_mutex);
922 if (!(s->features & SS_CAP_STATIC_MAP)) {
923 win->res = pcmcia_find_mem_region(res->start, res->end, align,
926 dev_dbg(&p_dev->dev, "allocating mem region failed\n");
927 mutex_unlock(&s->ops_mutex);
931 p_dev->_win |= CLIENT_WIN_REQ(w);
933 /* Configure the socket controller */
935 win->flags = res->flags & WIN_FLAGS_MAP;
939 if (s->ops->set_mem_map(s, win) != 0) {
940 dev_dbg(&p_dev->dev, "failed to set memory mapping\n");
941 mutex_unlock(&s->ops_mutex);
944 s->state |= SOCKET_WIN_REQ(w);
946 /* Return window handle */
947 if (s->features & SS_CAP_STATIC_MAP)
948 res->start = win->static_start;
950 res->start = win->res->start;
952 /* convert to new-style resources */
953 res->end += res->start - 1;
954 res->flags &= ~WIN_FLAGS_REQ;
955 res->flags |= (win->map << 2) | IORESOURCE_MEM;
956 res->parent = win->res;
958 request_resource(&iomem_resource, res);
960 dev_dbg(&p_dev->dev, "request_window results in %pR\n", res);
962 mutex_unlock(&s->ops_mutex);
965 } /* pcmcia_request_window */
966 EXPORT_SYMBOL(pcmcia_request_window);
970 * pcmcia_disable_device() - disable and clean up a PCMCIA device
971 * @p_dev: the associated PCMCIA device
973 * pcmcia_disable_device() is the driver-callable counterpart to
974 * pcmcia_enable_device(): If a PCMCIA device is no longer used,
975 * drivers are expected to clean up and disable the device by calling
976 * this function. Any I/O ranges (iomem and ioports) will be released,
977 * the Vpp voltage will be set to 0, and IRQs will no longer be
978 * generated -- at least if there is no other card function (of
979 * multifunction devices) being used.
981 void pcmcia_disable_device(struct pcmcia_device *p_dev)
985 dev_dbg(&p_dev->dev, "disabling device\n");
987 for (i = 0; i < MAX_WIN; i++) {
988 struct resource *res = p_dev->resource[MAX_IO_WIN + i];
989 if (res->flags & WIN_FLAGS_REQ)
990 pcmcia_release_window(p_dev, res);
993 pcmcia_release_configuration(p_dev);
994 pcmcia_release_io(p_dev);
996 free_irq(p_dev->irq, p_dev->priv);
1000 EXPORT_SYMBOL(pcmcia_disable_device);