167 lines
3.8 KiB
C
167 lines
3.8 KiB
C
/*
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* rsrc_mgr.c -- Resource management routines and/or wrappers
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The initial developer of the original code is David A. Hinds
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* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
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*
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* (C) 1999 David A. Hinds
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cs.h>
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#include "cs_internal.h"
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#ifdef CONFIG_PCMCIA_PROBE
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static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
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{
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int irq;
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u32 mask;
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irq = adj->resource.irq.IRQ;
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if ((irq < 0) || (irq > 15))
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return CS_BAD_IRQ;
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if (adj->Action != REMOVE_MANAGED_RESOURCE)
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return 0;
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mask = 1 << irq;
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if (!(s->irq_mask & mask))
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return 0;
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s->irq_mask &= ~mask;
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return 0;
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}
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#else
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static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
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return CS_SUCCESS;
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}
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#endif
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int pcmcia_adjust_resource_info(adjust_t *adj)
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{
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struct pcmcia_socket *s;
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int ret = CS_UNSUPPORTED_FUNCTION;
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unsigned long flags;
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down_read(&pcmcia_socket_list_rwsem);
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list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
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if (adj->Resource == RES_IRQ)
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ret = adjust_irq(s, adj);
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else if (s->resource_ops->adjust_resource) {
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/* you can't use the old interface if the new
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* one was used before */
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spin_lock_irqsave(&s->lock, flags);
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if ((s->resource_setup_new) &&
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!(s->resource_setup_old)) {
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spin_unlock_irqrestore(&s->lock, flags);
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continue;
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} else if (!(s->resource_setup_old))
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s->resource_setup_old = 1;
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spin_unlock_irqrestore(&s->lock, flags);
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ret = s->resource_ops->adjust_resource(s, adj);
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if (!ret) {
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/* as there's no way we know this is the
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* last call to adjust_resource_info, we
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* always need to assume this is the latest
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* one... */
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spin_lock_irqsave(&s->lock, flags);
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s->resource_setup_done = 1;
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spin_unlock_irqrestore(&s->lock, flags);
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}
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}
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}
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up_read(&pcmcia_socket_list_rwsem);
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return (ret);
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}
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EXPORT_SYMBOL(pcmcia_adjust_resource_info);
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void pcmcia_validate_mem(struct pcmcia_socket *s)
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{
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if (s->resource_ops->validate_mem)
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s->resource_ops->validate_mem(s);
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}
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EXPORT_SYMBOL(pcmcia_validate_mem);
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int pcmcia_adjust_io_region(struct resource *res, unsigned long r_start,
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unsigned long r_end, struct pcmcia_socket *s)
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{
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if (s->resource_ops->adjust_io_region)
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return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
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return -ENOMEM;
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}
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EXPORT_SYMBOL(pcmcia_adjust_io_region);
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struct resource *pcmcia_find_io_region(unsigned long base, int num,
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unsigned long align, struct pcmcia_socket *s)
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{
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if (s->resource_ops->find_io)
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return s->resource_ops->find_io(base, num, align, s);
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return NULL;
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}
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EXPORT_SYMBOL(pcmcia_find_io_region);
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struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
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int low, struct pcmcia_socket *s)
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{
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if (s->resource_ops->find_mem)
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return s->resource_ops->find_mem(base, num, align, low, s);
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return NULL;
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}
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EXPORT_SYMBOL(pcmcia_find_mem_region);
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void release_resource_db(struct pcmcia_socket *s)
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{
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if (s->resource_ops->exit)
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s->resource_ops->exit(s);
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}
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static int static_init(struct pcmcia_socket *s)
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{
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unsigned long flags;
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/* the good thing about SS_CAP_STATIC_MAP sockets is
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* that they don't need a resource database */
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spin_lock_irqsave(&s->lock, flags);
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s->resource_setup_done = 1;
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spin_unlock_irqrestore(&s->lock, flags);
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return 0;
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}
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struct pccard_resource_ops pccard_static_ops = {
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.validate_mem = NULL,
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.adjust_io_region = NULL,
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.find_io = NULL,
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.find_mem = NULL,
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.adjust_resource = NULL,
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.init = static_init,
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.exit = NULL,
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};
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EXPORT_SYMBOL(pccard_static_ops);
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