[POWERPC] 4xx bootwrapper reworks

Make the fixup_memsize function common for all of 4xx as several chips share
the same SDRAM controller.  Also add functions to reset 40x chips and quiesce
the ethernet.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

5 files changed, 55 insertions, 10 deletions

diff --git a/arch/powerpc/boot/44x.h b/arch/powerpc/boot/44x.h
index 577982c9a3cd..490a1cbdf1ed 100644
--- a/arch/powerpc/boot/44x.h
+++ b/arch/powerpc/boot/44x.h
@@ -10,10 +10,6 @@
 #ifndef _PPC_BOOT_44X_H_
 #define _PPC_BOOT_44X_H_
 
-void ibm44x_fixup_memsize(void);
-void ibm4xx_fixup_ebc_ranges(const char *ebc);
-
-void ibm44x_dbcr_reset(void);
 void ebony_init(void *mac0, void *mac1);
 
 #endif /* _PPC_BOOT_44X_H_ */
diff --git a/arch/powerpc/boot/4xx.c b/arch/powerpc/boot/4xx.c
index 9f64e840bef6..59026e4585dc 100644
--- a/arch/powerpc/boot/4xx.c
+++ b/arch/powerpc/boot/4xx.c
@@ -21,8 +21,8 @@
 #include "reg.h"
 #include "dcr.h"
 
-/* Read the 44x memory controller to get size of system memory. */
-void ibm44x_fixup_memsize(void)
+/* Read the 4xx SDRAM controller to get size of system memory. */
+void ibm4xx_fixup_memsize(void)
 {
         int i;
         unsigned long memsize, bank_config;
@@ -39,8 +39,9 @@ void ibm44x_fixup_memsize(void)
         dt_fixup_memory(0, memsize);
 }
 
-#define SPRN_DBCR0              0x134
-#define   DBCR0_RST_SYSTEM      0x30000000
+#define SPRN_DBCR0_40X 0x3F2
+#define SPRN_DBCR0_44X 0x134
+#define DBCR0_RST_SYSTEM 0x30000000
 
 void ibm44x_dbcr_reset(void)
 {
@@ -50,11 +51,35 @@ void ibm44x_dbcr_reset(void)
                 "mfspr  %0,%1\n"
                 "oris   %0,%0,%2@h\n"
                 "mtspr  %1,%0"
-                : "=&r"(tmp) : "i"(SPRN_DBCR0), "i"(DBCR0_RST_SYSTEM)
+                : "=&r"(tmp) : "i"(SPRN_DBCR0_44X), "i"(DBCR0_RST_SYSTEM)
                 );
 
 }
 
+void ibm40x_dbcr_reset(void)
+{
+        unsigned long tmp;
+
+        asm volatile (
+                "mfspr  %0,%1\n"
+                "oris   %0,%0,%2@h\n"
+                "mtspr  %1,%0"
+                : "=&r"(tmp) : "i"(SPRN_DBCR0_40X), "i"(DBCR0_RST_SYSTEM)
+                );
+}
+
+#define EMAC_RESET 0x20000000
+void ibm4xx_quiesce_eth(u32 *emac0, u32 *emac1)
+{
+        /* Quiesce the MAL and EMAC(s) since PIBS/OpenBIOS don't do this for us */
+        if (emac0)
+                *emac0 = EMAC_RESET;
+        if (emac1)
+                *emac1 = EMAC_RESET;
+
+        mtdcr(DCRN_MAL0_CFG, MAL_RESET);
+}
+
 /* Read 4xx EBC bus bridge registers to get mappings of the peripheral
  * banks into the OPB address space */
 void ibm4xx_fixup_ebc_ranges(const char *ebc)
diff --git a/arch/powerpc/boot/4xx.h b/arch/powerpc/boot/4xx.h
new file mode 100644
index 000000000000..65008427e03f
--- /dev/null
+++ b/arch/powerpc/boot/4xx.h
@@ -0,0 +1,20 @@
+/*
+ * PowerPC 4xx related functions
+ *
+ * Copyright 2007 IBM Corporation.
+ * Josh Boyer <jwboyer@linux.vnet.ibm.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#ifndef _POWERPC_BOOT_4XX_H_
+#define _POWERPC_BOOT_4XX_H_
+
+void ibm4xx_fixup_memsize(void);
+void ibm44x_dbcr_reset(void);
+void ibm40x_dbcr_reset(void);
+void ibm4xx_quiesce_eth(u32 *emac0, u32 *emac1);
+void ibm4xx_fixup_ebc_ranges(const char *ebc);
+
+#endif /* _POWERPC_BOOT_4XX_H_ */
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 14b44aa96fea..c95d1a9222c9 100644
--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -121,4 +121,7 @@ static const unsigned long sdram_bxcr[] = { SDRAM0_B0CR, SDRAM0_B1CR, SDRAM0_B2C
 #define DCRN_CPC0_MIRQ1                                 0x0ed
 #define DCRN_CPC0_JTAGID                                0x0ef
 
+#define DCRN_MAL0_CFG                                   0x180
+#define MAL_RESET 0x80000000
+
 #endif  /* _PPC_BOOT_DCR_H_ */
diff --git a/arch/powerpc/boot/ebony.c b/arch/powerpc/boot/ebony.c
index eaf0b9bb68d6..2b9a809bcd74 100644
--- a/arch/powerpc/boot/ebony.c
+++ b/arch/powerpc/boot/ebony.c
@@ -26,6 +26,7 @@
 #include "reg.h"
 #include "io.h"
 #include "dcr.h"
+#include "4xx.h"
 #include "44x.h"
 
 extern char _dtb_start[];
@@ -136,7 +137,7 @@ static void ebony_fixups(void)
         unsigned long sysclk = 33000000;
 
         ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
-        ibm44x_fixup_memsize();
+        ibm4xx_fixup_memsize();
         dt_fixup_mac_addresses(ebony_mac0, ebony_mac1);
         ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
         ebony_flashsel_fixup();