The current resource framework is fully geared towards memory
mapped I/O.
This patch adds support for other types of I/O in the resource
structures / function calls.
---
common/memory.c | 2 +-
common/resource.c | 18 ++++++++++++++++--
drivers/base/driver.c | 36 ++++++++++++++++++------------------
include/driver.h | 24 +++++++++++++++++-------
include/linux/ioport.h | 5 ++++-
5 files changed, 56 insertions(+), 29 deletions(-)
diff --git a/common/memory.c b/common/memory.c
index c82bbaa..d36c8df 100644
--- a/common/memory.c
+++ b/common/memory.c
@@ -148,7 +148,7 @@ struct resource *request_sdram_region(const char
*name, resource_size_t start,
for_each_memory_bank(bank) {
struct resource *res;
- res = request_region(bank->res, name, start, start + size - 1);
+ res = request_region(bank->res, name, start, start + size - 1,
IORESOURCE_MEM);
if (res)
return res;
}
diff --git a/common/resource.c b/common/resource.c
index 5795e79..6600444 100644
--- a/common/resource.c
+++ b/common/resource.c
@@ -38,7 +38,7 @@ static int init_resource(struct resource *res, const
char *name)
*/
struct resource *request_region(struct resource *parent,
const char *name, resource_size_t start,
- resource_size_t end)
+ resource_size_t end, int type)
{
struct resource *r, *new;
@@ -70,6 +70,10 @@ struct resource *request_region(struct resource
*parent,
goto ok;
if (start > r->end)
continue;
+
+ if (type != resource_type(r->parent))
+ continue;
+
debug("%s: 0x%08llx:0x%08llx conflicts with 0x%08llx:0x%08llx\n",
__func__,
(unsigned long long)start,
@@ -89,6 +93,7 @@ ok:
new->start = start;
new->end = end;
new->parent = parent;
+ new->flags = type;
list_add_tail(&new->sibling, &r->sibling);
return new;
@@ -123,5 +128,14 @@ struct resource iomem_resource = {
struct resource *request_iomem_region(const char *name,
resource_size_t start, resource_size_t end)
{
- return request_region(&iomem_resource, name, start, end);
+ return request_region(&iomem_resource, name, start, end, IORESOURCE_MEM);
+}
+
+/*
+ * request an io region inside the io space
+ */
+struct resource *request_io_region(const char *name,
+ resource_size_t start, resource_size_t end,int type)
+{
+ return request_region(&iomem_resource, name, start, end, type);
}
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 37560fd..560579a 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -241,13 +241,13 @@ int register_driver(struct driver_d *drv)
}
EXPORT_SYMBOL(register_driver);
-struct resource *dev_get_resource(struct device_d *dev, int num)
+struct resource *dev_get_resource(struct device_d *dev, int num, int type)
{
int i, n = 0;
for (i = 0; i < dev->num_resources; i++) {
struct resource *res = &dev->resource[i];
- if (resource_type(res) == IORESOURCE_MEM) {
+ if (!type || (resource_type(res) == type)) {
if (n == num)
return res;
n++;
@@ -257,26 +257,26 @@ struct resource *dev_get_resource(struct device_d
*dev, int num)
return NULL;
}
-void *dev_get_mem_region(struct device_d *dev, int num)
+void *dev_get_region(struct device_d *dev, int num, int type)
{
struct resource *res;
- res = dev_get_resource(dev, num);
+ res = dev_get_resource(dev, num, type);
if (!res)
return NULL;
return (void __force *)res->start;
}
-EXPORT_SYMBOL(dev_get_mem_region);
+EXPORT_SYMBOL(dev_get_region);
struct resource *dev_get_resource_by_name(struct device_d *dev,
- const char *name)
+ const char *name, int type)
{
int i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *res = &dev->resource[i];
- if (resource_type(res) != IORESOURCE_MEM)
+ if (!type && (resource_type(res) != type))
continue;
if (!res->name)
continue;
@@ -287,49 +287,49 @@ struct resource *dev_get_resource_by_name(struct
device_d *dev,
return NULL;
}
-void *dev_get_mem_region_by_name(struct device_d *dev, const char *name)
+void *dev_get_region_by_name(struct device_d *dev, const char *name,
int type)
{
struct resource *res;
- res = dev_get_resource_by_name(dev, name);
+ res = dev_get_resource_by_name(dev, name, type);
if (!res)
return NULL;
return (void __force *)res->start;
}
-EXPORT_SYMBOL(dev_get_mem_region_by_name);
+EXPORT_SYMBOL(dev_get_region_by_name);
-void __iomem *dev_request_mem_region_by_name(struct device_d *dev,
const char *name)
+void __iomem *dev_request_region_by_name(struct device_d *dev, const
char *name, int type)
{
struct resource *res;
- res = dev_get_resource_by_name(dev, name);
+ res = dev_get_resource_by_name(dev, name, type);
if (!res)
return NULL;
- res = request_iomem_region(dev_name(dev), res->start, res->end);
+ res = request_io_region(dev_name(dev), res->start, res->end, type);
if (!res)
return NULL;
return (void __force __iomem *)res->start;
}
-EXPORT_SYMBOL(dev_request_mem_region_by_name);
+EXPORT_SYMBOL(dev_request_region_by_name);
-void __iomem *dev_request_mem_region(struct device_d *dev, int num)
+void __iomem *dev_request_region(struct device_d *dev, int num,int type)
{
struct resource *res;
- res = dev_get_resource(dev, num);
+ res = dev_get_resource(dev, num, type);
if (!res)
return NULL;
- res = request_iomem_region(dev_name(dev), res->start, res->end);
+ res = request_io_region(dev_name(dev), res->start, res->end, type);
if (!res)
return NULL;
return (void __force __iomem *)res->start;
}
-EXPORT_SYMBOL(dev_request_mem_region);
+EXPORT_SYMBOL(dev_request_region);
int dev_protect(struct device_d *dev, size_t count, unsigned long
offset, int prot)
{
diff --git a/include/driver.h b/include/driver.h
index 01b181d..2eb4cf8 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -203,31 +203,41 @@ static inline const char *dev_name(const struct
device_d *dev)
/*
* get resource 'num' for a device
*/
-struct resource *dev_get_resource(struct device_d *dev, int num);
+struct resource *dev_get_resource(struct device_d *dev, int num, int type);
/*
* get resource base 'name' for a device
*/
struct resource *dev_get_resource_by_name(struct device_d *dev,
- const char *name);
+ const char *name, int type);
+
/*
+ *
* get register base 'name' for a device
*/
-void *dev_get_mem_region_by_name(struct device_d *dev, const char *name);
+void *dev_get_region_by_name(struct device_d *dev, const char *name,
int type);
/*
* exlusively request register base 'name' for a device
*/
-void __iomem *dev_request_mem_region_by_name(struct device_d *dev,
- const char *name);
+void __iomem *dev_request_region_by_name(struct device_d *dev,
+ const char *name, int type);
/*
* get register base 'num' for a device
*/
-void *dev_get_mem_region(struct device_d *dev, int num);
+void *dev_get_region(struct device_d *dev, int num, int type);
/*
* exlusively request register base 'num' for a device
*/
-void __iomem *dev_request_mem_region(struct device_d *dev, int num);
+void __iomem *dev_request_region(struct device_d *dev, int num, int type);
+
+/*
+ * Macros for requesting memory resources
+ */
+#define dev_get_mem_region(dev, num) dev_get_region(dev, num,
IORESOURCE_MEM)
+#define dev_get_mem_region_by_name(dev, name)
dev_get_region_by_name(dev, name, IORESOURCE_MEM)
+#define dev_request_mem_region_by_name(dev, name)
dev_request_region_by_name(dev, name, IORESOURCE_MEM)
+#define dev_request_mem_region(dev, num) dev_request_region(dev, num,
IORESOURCE_MEM)
struct device_d *device_alloc(const char *devname, int id);
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index ff0cba0..3fc2665 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -138,9 +138,12 @@ static inline unsigned long resource_type(const
struct resource *res)
struct resource *request_iomem_region(const char *name,
resource_size_t start, resource_size_t end);
+struct resource *request_io_region(const char *name,
+ resource_size_t start, resource_size_t end, int type);
+
struct resource *request_region(struct resource *parent,
const char *name, resource_size_t end,
- resource_size_t size);
+ resource_size_t size,int type);
int release_region(struct resource *res);
-- 1.8.4
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