summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/sysdev/dcr.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/sysdev/dcr.c')
-rw-r--r--arch/powerpc/sysdev/dcr.c156
1 files changed, 123 insertions, 33 deletions
diff --git a/arch/powerpc/sysdev/dcr.c b/arch/powerpc/sysdev/dcr.c
index 437e48d3ae33..a8ba9983dd5a 100644
--- a/arch/powerpc/sysdev/dcr.c
+++ b/arch/powerpc/sysdev/dcr.c
@@ -23,6 +23,107 @@
#include <asm/prom.h>
#include <asm/dcr.h>
+#ifdef CONFIG_PPC_DCR_MMIO
+static struct device_node *find_dcr_parent(struct device_node *node)
+{
+ struct device_node *par, *tmp;
+ const u32 *p;
+
+ for (par = of_node_get(node); par;) {
+ if (of_get_property(par, "dcr-controller", NULL))
+ break;
+ p = of_get_property(par, "dcr-parent", NULL);
+ tmp = par;
+ if (p == NULL)
+ par = of_get_parent(par);
+ else
+ par = of_find_node_by_phandle(*p);
+ of_node_put(tmp);
+ }
+ return par;
+}
+#endif
+
+#if defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO)
+
+bool dcr_map_ok_generic(dcr_host_t host)
+{
+ if (host.type == DCR_HOST_NATIVE)
+ return dcr_map_ok_native(host.host.native);
+ else if (host.type == DCR_HOST_MMIO)
+ return dcr_map_ok_mmio(host.host.mmio);
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dcr_map_ok_generic);
+
+dcr_host_t dcr_map_generic(struct device_node *dev,
+ unsigned int dcr_n,
+ unsigned int dcr_c)
+{
+ dcr_host_t host;
+ struct device_node *dp;
+ const char *prop;
+
+ host.type = DCR_HOST_INVALID;
+
+ dp = find_dcr_parent(dev);
+ if (dp == NULL)
+ return host;
+
+ prop = of_get_property(dp, "dcr-access-method", NULL);
+
+ pr_debug("dcr_map_generic(dcr-access-method = %s)\n", prop);
+
+ if (!strcmp(prop, "native")) {
+ host.type = DCR_HOST_NATIVE;
+ host.host.native = dcr_map_native(dev, dcr_n, dcr_c);
+ } else if (!strcmp(prop, "mmio")) {
+ host.type = DCR_HOST_MMIO;
+ host.host.mmio = dcr_map_mmio(dev, dcr_n, dcr_c);
+ }
+
+ of_node_put(dp);
+ return host;
+}
+EXPORT_SYMBOL_GPL(dcr_map_generic);
+
+void dcr_unmap_generic(dcr_host_t host, unsigned int dcr_c)
+{
+ if (host.type == DCR_HOST_NATIVE)
+ dcr_unmap_native(host.host.native, dcr_c);
+ else if (host.type == DCR_HOST_MMIO)
+ dcr_unmap_mmio(host.host.mmio, dcr_c);
+ else /* host.type == DCR_HOST_INVALID */
+ WARN_ON(true);
+}
+EXPORT_SYMBOL_GPL(dcr_unmap_generic);
+
+u32 dcr_read_generic(dcr_host_t host, unsigned int dcr_n)
+{
+ if (host.type == DCR_HOST_NATIVE)
+ return dcr_read_native(host.host.native, dcr_n);
+ else if (host.type == DCR_HOST_MMIO)
+ return dcr_read_mmio(host.host.mmio, dcr_n);
+ else /* host.type == DCR_HOST_INVALID */
+ WARN_ON(true);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dcr_read_generic);
+
+void dcr_write_generic(dcr_host_t host, unsigned int dcr_n, u32 value)
+{
+ if (host.type == DCR_HOST_NATIVE)
+ dcr_write_native(host.host.native, dcr_n, value);
+ else if (host.type == DCR_HOST_MMIO)
+ dcr_write_mmio(host.host.mmio, dcr_n, value);
+ else /* host.type == DCR_HOST_INVALID */
+ WARN_ON(true);
+}
+EXPORT_SYMBOL_GPL(dcr_write_generic);
+
+#endif /* defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) */
+
unsigned int dcr_resource_start(struct device_node *np, unsigned int index)
{
unsigned int ds;
@@ -47,26 +148,7 @@ unsigned int dcr_resource_len(struct device_node *np, unsigned int index)
}
EXPORT_SYMBOL_GPL(dcr_resource_len);
-#ifndef CONFIG_PPC_DCR_NATIVE
-
-static struct device_node * find_dcr_parent(struct device_node * node)
-{
- struct device_node *par, *tmp;
- const u32 *p;
-
- for (par = of_node_get(node); par;) {
- if (of_get_property(par, "dcr-controller", NULL))
- break;
- p = of_get_property(par, "dcr-parent", NULL);
- tmp = par;
- if (p == NULL)
- par = of_get_parent(par);
- else
- par = of_find_node_by_phandle(*p);
- of_node_put(tmp);
- }
- return par;
-}
+#ifdef CONFIG_PPC_DCR_MMIO
u64 of_translate_dcr_address(struct device_node *dev,
unsigned int dcr_n,
@@ -75,7 +157,7 @@ u64 of_translate_dcr_address(struct device_node *dev,
struct device_node *dp;
const u32 *p;
unsigned int stride;
- u64 ret;
+ u64 ret = OF_BAD_ADDR;
dp = find_dcr_parent(dev);
if (dp == NULL)
@@ -90,7 +172,7 @@ u64 of_translate_dcr_address(struct device_node *dev,
if (p == NULL)
p = of_get_property(dp, "dcr-mmio-space", NULL);
if (p == NULL)
- return OF_BAD_ADDR;
+ goto done;
/* Maybe could do some better range checking here */
ret = of_translate_address(dp, p);
@@ -98,21 +180,25 @@ u64 of_translate_dcr_address(struct device_node *dev,
ret += (u64)(stride) * (u64)dcr_n;
if (out_stride)
*out_stride = stride;
+
+ done:
+ of_node_put(dp);
return ret;
}
-dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
- unsigned int dcr_c)
+dcr_host_mmio_t dcr_map_mmio(struct device_node *dev,
+ unsigned int dcr_n,
+ unsigned int dcr_c)
{
- dcr_host_t ret = { .token = NULL, .stride = 0, .base = dcr_n };
+ dcr_host_mmio_t ret = { .token = NULL, .stride = 0, .base = dcr_n };
u64 addr;
pr_debug("dcr_map(%s, 0x%x, 0x%x)\n",
dev->full_name, dcr_n, dcr_c);
addr = of_translate_dcr_address(dev, dcr_n, &ret.stride);
- pr_debug("translates to addr: 0x%lx, stride: 0x%x\n",
- addr, ret.stride);
+ pr_debug("translates to addr: 0x%llx, stride: 0x%x\n",
+ (unsigned long long) addr, ret.stride);
if (addr == OF_BAD_ADDR)
return ret;
pr_debug("mapping 0x%x bytes\n", dcr_c * ret.stride);
@@ -124,11 +210,11 @@ dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
ret.token -= dcr_n * ret.stride;
return ret;
}
-EXPORT_SYMBOL_GPL(dcr_map);
+EXPORT_SYMBOL_GPL(dcr_map_mmio);
-void dcr_unmap(dcr_host_t host, unsigned int dcr_c)
+void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c)
{
- dcr_host_t h = host;
+ dcr_host_mmio_t h = host;
if (h.token == NULL)
return;
@@ -136,7 +222,11 @@ void dcr_unmap(dcr_host_t host, unsigned int dcr_c)
iounmap(h.token);
h.token = NULL;
}
-EXPORT_SYMBOL_GPL(dcr_unmap);
-#else /* defined(CONFIG_PPC_DCR_NATIVE) */
+EXPORT_SYMBOL_GPL(dcr_unmap_mmio);
+
+#endif /* defined(CONFIG_PPC_DCR_MMIO) */
+
+#ifdef CONFIG_PPC_DCR_NATIVE
DEFINE_SPINLOCK(dcr_ind_lock);
-#endif /* !defined(CONFIG_PPC_DCR_NATIVE) */
+#endif /* defined(CONFIG_PPC_DCR_NATIVE) */
+
OpenPOWER on IntegriCloud