/* * 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/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_IOCTL #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); #endif int pcmcia_validate_mem(struct pcmcia_socket *s) { if (s->resource_ops->validate_mem) return s->resource_ops->validate_mem(s); /* if there is no callback, we can assume that everything is OK */ return 0; } 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); #ifdef CONFIG_PCCARD_IODYN static struct resource * make_resource(unsigned long b, unsigned long n, int flags, char *name) { struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL); if (res) { res->name = name; res->start = b; res->end = b + n - 1; res->flags = flags; } return res; } struct pcmcia_align_data { unsigned long mask; unsigned long offset; }; static void pcmcia_align(void *align_data, struct resource *res, unsigned long size, unsigned long align) { struct pcmcia_align_data *data = align_data; unsigned long start; start = (res->start & ~data->mask) + data->offset; if (start < res->start) start += data->mask + 1; res->start = start; #ifdef CONFIG_X86 if (res->flags & IORESOURCE_IO) { if (start & 0x300) { start = (start + 0x3ff) & ~0x3ff; res->start = start; } } #endif #ifdef CONFIG_M68K if (res->flags & IORESOURCE_IO) { if ((res->start + size - 1) >= 1024) res->start = res->end; } #endif } static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start, unsigned long r_end, struct pcmcia_socket *s) { return adjust_resource(res, r_start, r_end - r_start + 1); } static struct resource *iodyn_find_io_region(unsigned long base, int num, unsigned long align, struct pcmcia_socket *s) { struct resource *res = make_resource(0, num, IORESOURCE_IO, s->dev.class_id); struct pcmcia_align_data data; unsigned long min = base; int ret; if (align == 0) align = 0x10000; data.mask = align - 1; data.offset = base & data.mask; #ifdef CONFIG_PCI if (s->cb_dev) { ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, min, 0, pcmcia_align, &data); } else #endif ret = allocate_resource(&ioport_resource, res, num, min, ~0UL, 1, pcmcia_align, &data); if (ret != 0) { kfree(res); res = NULL; } return res; } struct pccard_resource_ops pccard_iodyn_ops = { .validate_mem = NULL, .adjust_io_region = iodyn_adjust_io_region, .find_io = iodyn_find_io_region, .find_mem = NULL, .adjust_resource = NULL, .init = static_init, .exit = NULL, }; EXPORT_SYMBOL(pccard_iodyn_ops); #endif /* CONFIG_PCCARD_IODYN */