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authorKonrad Eisele <konrad@gaisler.com>2009-08-17 02:13:32 +0200
committerDavid S. Miller <davem@davemloft.net>2009-08-18 03:32:10 +0200
commite63829de3d03f92cea2b26119e0aa9a7043b9913 (patch)
tree0f0bbf2f86ef8a447e9b2a298662003602650e87 /arch/sparc/kernel/prom_32.c
parentsparc,leon: Introduce the sparc-leon CPU type. (diff)
downloadlinux-e63829de3d03f92cea2b26119e0aa9a7043b9913.tar.xz
linux-e63829de3d03f92cea2b26119e0aa9a7043b9913.zip
sparc,leon: Added support for AMBAPP bus.
The device is a AMBA bus if it is a child of prom node "ambapp" (AMBA plug and play). Two functions leon_trans_init() and leon_node_init() (defined in sparc/kernel/leon_kernel.c) are called in the prom_build_tree() path if CONFIG_SPARC_LEON is defined. leon_node_init() will build up the device tree using AMBA plug and play. Also: a extra check was addes to prom_common.c:build_one_prop() in case a rom-node is undefined which can happen for SPARC-LEON because it creates only a minimum nodes to emulate sparc behaviour. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/prom_32.c')
-rw-r--r--arch/sparc/kernel/prom_32.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index fe43e80772db..0a37e8cfd160 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -24,6 +24,8 @@
#include <asm/prom.h>
#include <asm/oplib.h>
+#include <asm/leon.h>
+#include <asm/leon_amba.h>
#include "prom.h"
@@ -131,6 +133,35 @@ static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
regs->which_io, regs->phys_addr);
}
+/* "name:vendor:device@irq,addrlo" */
+static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf)
+{
+ struct amba_prom_registers *regs; unsigned int *intr;
+ unsigned int *device, *vendor;
+ struct property *prop;
+
+ prop = of_find_property(dp, "reg", NULL);
+ if (!prop)
+ return;
+ regs = prop->value;
+ prop = of_find_property(dp, "interrupts", NULL);
+ if (!prop)
+ return;
+ intr = prop->value;
+ prop = of_find_property(dp, "vendor", NULL);
+ if (!prop)
+ return;
+ vendor = prop->value;
+ prop = of_find_property(dp, "device", NULL);
+ if (!prop)
+ return;
+ device = prop->value;
+
+ sprintf(tmp_buf, "%s:%d:%d@%x,%x",
+ dp->name, *vendor, *device,
+ *intr, regs->phys_addr);
+}
+
static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
{
struct device_node *parent = dp->parent;
@@ -143,6 +174,8 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
return sbus_path_component(dp, tmp_buf);
if (!strcmp(parent->type, "ebus"))
return ebus_path_component(dp, tmp_buf);
+ if (!strcmp(parent->type, "ambapp"))
+ return ambapp_path_component(dp, tmp_buf);
/* "isa" is handled with platform naming */
}