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authorAnatolij Gustschin <agust@denx.de>2010-02-16 10:36:26 -0700
committerGrant Likely <grant.likely@secretlab.ca>2010-02-16 10:36:26 -0700
commita8dbceb755f82f760b56bac4283f9cfc7774e62b (patch)
treee67da86732c70100ecfa137ac99eba47ec64aa2b /arch
parent284ed66fc3beca509a7549aae06af5c74023304c (diff)
downloadvexpress-lsk-a8dbceb755f82f760b56bac4283f9cfc7774e62b.tar.gz
powerpc/mpc5121: Add machine restart support
Add reset module registers representation and machine restart callback for mpc5121 platform. Signed-off-by: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/mpc5121.h24
-rw-r--r--arch/powerpc/platforms/512x/mpc5121_ads.c1
-rw-r--r--arch/powerpc/platforms/512x/mpc5121_generic.c1
-rw-r--r--arch/powerpc/platforms/512x/mpc512x.h1
-rw-r--r--arch/powerpc/platforms/512x/mpc512x_shared.c30
5 files changed, 57 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mpc5121.h b/arch/powerpc/include/asm/mpc5121.h
new file mode 100644
index 00000000000..e6a30bb1d16
--- /dev/null
+++ b/arch/powerpc/include/asm/mpc5121.h
@@ -0,0 +1,24 @@
+/*
+ * MPC5121 Prototypes and definitions
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.
+ */
+
+#ifndef __ASM_POWERPC_MPC5121_H__
+#define __ASM_POWERPC_MPC5121_H__
+
+/* MPC512x Reset module registers */
+struct mpc512x_reset_module {
+ u32 rcwlr; /* Reset Configuration Word Low Register */
+ u32 rcwhr; /* Reset Configuration Word High Register */
+ u32 reserved1;
+ u32 reserved2;
+ u32 rsr; /* Reset Status Register */
+ u32 rmr; /* Reset Mode Register */
+ u32 rpr; /* Reset Protection Register */
+ u32 rcr; /* Reset Control Register */
+ u32 rcer; /* Reset Control Enable Register */
+};
+
+#endif /* __ASM_POWERPC_MPC5121_H__ */
diff --git a/arch/powerpc/platforms/512x/mpc5121_ads.c b/arch/powerpc/platforms/512x/mpc5121_ads.c
index 0f8f2e96ee5..ee6ae129c25 100644
--- a/arch/powerpc/platforms/512x/mpc5121_ads.c
+++ b/arch/powerpc/platforms/512x/mpc5121_ads.c
@@ -68,4 +68,5 @@ define_machine(mpc5121_ads) {
.init_IRQ = mpc5121_ads_init_IRQ,
.get_irq = ipic_get_irq,
.calibrate_decr = generic_calibrate_decr,
+ .restart = mpc512x_restart,
};
diff --git a/arch/powerpc/platforms/512x/mpc5121_generic.c b/arch/powerpc/platforms/512x/mpc5121_generic.c
index 9b8c9b0bedf..a6c0e3a2615 100644
--- a/arch/powerpc/platforms/512x/mpc5121_generic.c
+++ b/arch/powerpc/platforms/512x/mpc5121_generic.c
@@ -55,4 +55,5 @@ define_machine(mpc5121_generic) {
.init_IRQ = mpc512x_init_IRQ,
.get_irq = ipic_get_irq,
.calibrate_decr = generic_calibrate_decr,
+ .restart = mpc512x_restart,
};
diff --git a/arch/powerpc/platforms/512x/mpc512x.h b/arch/powerpc/platforms/512x/mpc512x.h
index ac3da1a0c4e..b2daca0d148 100644
--- a/arch/powerpc/platforms/512x/mpc512x.h
+++ b/arch/powerpc/platforms/512x/mpc512x.h
@@ -15,4 +15,5 @@ extern void __init mpc512x_init_IRQ(void);
extern void __init mpc512x_init(void);
extern int __init mpc5121_clk_init(void);
void __init mpc512x_declare_of_platform_devices(void);
+extern void mpc512x_restart(char *cmd);
#endif /* __MPC512X_H__ */
diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c b/arch/powerpc/platforms/512x/mpc512x_shared.c
index b683165a24e..a45824af03f 100644
--- a/arch/powerpc/platforms/512x/mpc512x_shared.c
+++ b/arch/powerpc/platforms/512x/mpc512x_shared.c
@@ -21,9 +21,38 @@
#include <asm/ipic.h>
#include <asm/prom.h>
#include <asm/time.h>
+#include <asm/mpc5121.h>
#include "mpc512x.h"
+static struct mpc512x_reset_module __iomem *reset_module_base;
+
+static void __init mpc512x_restart_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-reset");
+ if (!np)
+ return;
+
+ reset_module_base = of_iomap(np, 0);
+ of_node_put(np);
+}
+
+void mpc512x_restart(char *cmd)
+{
+ if (reset_module_base) {
+ /* Enable software reset "RSTE" */
+ out_be32(&reset_module_base->rpr, 0x52535445);
+ /* Set software hard reset */
+ out_be32(&reset_module_base->rcr, 0x2);
+ } else {
+ pr_err("Restart module not mapped.\n");
+ }
+ for (;;)
+ ;
+}
+
void __init mpc512x_init_IRQ(void)
{
struct device_node *np;
@@ -62,4 +91,5 @@ void __init mpc512x_init(void)
{
mpc512x_declare_of_platform_devices();
mpc5121_clk_init();
+ mpc512x_restart_init();
}