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