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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/pcmcia/rsrc_mgr.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/pcmcia/rsrc_mgr.c')
-rw-r--r--drivers/pcmcia/rsrc_mgr.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/pcmcia/rsrc_mgr.c b/drivers/pcmcia/rsrc_mgr.c
new file mode 100644
index 000000000000..b6843f8d300d
--- /dev/null
+++ b/drivers/pcmcia/rsrc_mgr.c
@@ -0,0 +1,163 @@
+/*
+ * 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_done) &&
+ !(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 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;
+}
+
+struct resource *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;
+}
+
+struct resource *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;
+}
+
+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);