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pcmcia: insert PCMCIA device resources into resource tree

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Insert PCMCIA device resources into the resource tree. However, this is
currently only implemented for sockets which do not statically map the
resources.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski
2010-07-25 13:10:22 +02:00
parent 8f677ea07a
commit ad0c7be28b
6 changed files with 60 additions and 34 deletions
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74
drivers/pcmcia/pcmcia_resource.c
View File

@@ -56,6 +56,33 @@ struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
}
static void release_io_space(struct pcmcia_socket *s, struct resource *res)
{
resource_size_t num = resource_size(res);
int i;
dev_dbg(&s->dev, "release_io_space for %pR\n", res);
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
continue;
if ((s->io[i].res->start <= res->start) &&
(s->io[i].res->end >= res->end)) {
s->io[i].InUse -= num;
if (res->parent)
release_resource(res);
res->start = res->end = 0;
res->flags = IORESOURCE_IO;
/* Free the window if no one else is using it */
if (s->io[i].InUse == 0) {
release_resource(s->io[i].res);
kfree(s->io[i].res);
s->io[i].res = NULL;
}
}
}
} /* release_io_space */
/** alloc_io_space
*
* Special stuff for managing IO windows, because they are scarce
@@ -87,43 +114,28 @@ static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
align = 0;
}
ret = s->resource_ops->find_io(s, res->flags, &base, num, align);
ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
&res->parent);
if (ret) {
dev_dbg(&s->dev, "alloc_io_space request returned %d", ret);
dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
return -EINVAL;
}
res->start = base;
res->end = res->start + num - 1;
dev_dbg(&s->dev, "alloc_io_space request returned %pR, %d\n", res, ret);
return 0;
} /* alloc_io_space */
static void release_io_space(struct pcmcia_socket *s, struct resource *res)
{
resource_size_t num = resource_size(res);
int i;
dev_dbg(&s->dev, "release_io_space for %pR\n", res);
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
continue;
if ((s->io[i].res->start <= res->start) &&
(s->io[i].res->end >= res->end)) {
s->io[i].InUse -= num;
res->start = res->end = 0;
res->flags = IORESOURCE_IO;
/* Free the window if no one else is using it */
if (s->io[i].InUse == 0) {
release_resource(s->io[i].res);
kfree(s->io[i].res);
s->io[i].res = NULL;
}
if (res->parent) {
ret = request_resource(res->parent, res);
if (ret) {
dev_warn(&s->dev,
"request_resource %pR failed: %d\n", res, ret);
res->parent = NULL;
release_io_space(s, res);
}
}
} /* release_io_space */
dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
return ret;
} /* alloc_io_space */
/**
@@ -401,6 +413,7 @@ int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
/* Release system memory */
if (win->res) {
release_resource(res);
release_resource(win->res);
kfree(win->res);
win->res = NULL;
@@ -853,6 +866,11 @@ int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_ha
res->end = req->Base + req->Size - 1;
res->flags &= ~IORESOURCE_BITS;
res->flags |= (req->Attributes & WIN_FLAGS_MAP) | (win->map << 2);
res->flags |= IORESOURCE_MEM;
res->parent = win->res;
if (win->res)
request_resource(&iomem_resource, res);
dev_dbg(&s->dev, "request_window results in %pR\n", res);
mutex_unlock(&s->ops_mutex);