ppc4xx: Add initial AMCC Kilauea 405EX support
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/kilauea/init.S b/board/amcc/kilauea/init.S
new file mode 100644
index 0000000..c181d61
--- /dev/null
+++ b/board/amcc/kilauea/init.S
@@ -0,0 +1,152 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * Based on code provided from UDTech and AMCC
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <ppc4xx.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#define mtsdram_as(reg, value) \
+ addi r4,0,reg ; \
+ mtdcr memcfga,r4 ; \
+ addis r4,0,value@h ; \
+ ori r4,r4,value@l ; \
+ mtdcr memcfgd,r4 ;
+
+ .globl ext_bus_cntlr_init
+ext_bus_cntlr_init:
+
+ /*
+ * DDR2 setup
+ */
+
+ /* Following the DDR Core Manual, here is the initialization */
+
+ /* Step 1 */
+
+ /* Step 2 */
+
+ /* Step 3 */
+
+ /* SET SDRAM_MB0CF base addr 00000000 - 128MB */
+ mtsdram_as(SDRAM_MB0CF, 0x00007701); /* 8 -- 7*/
+
+ /* SET SDRAM_MB1CF - Not enabled */
+ mtsdram_as(SDRAM_MB1CF, 0x00000000);
+
+ /* SET SDRAM_MB2CF - Not enabled */
+ mtsdram_as(SDRAM_MB2CF, 0x00000000);
+
+ /* SET SDRAM_MB3CF - Not enabled */
+ mtsdram_as(SDRAM_MB3CF, 0x00000000);
+
+ /* SDRAM_CLKTR: Adv Addr clock by 90 deg */
+ mtsdram_as(SDRAM_CLKTR,0x80000000);
+
+ /* Refresh Time register (0x30) Refresh every 7.8125uS */
+ mtsdram_as(SDRAM_RTR, 0x06180000);
+
+ /* SDRAM_SDTR1 */
+ mtsdram_as(SDRAM_SDTR1,0x80201000);
+
+ /* SDRAM_SDTR2 */
+ mtsdram_as(SDRAM_SDTR2,0x32204232);
+
+ /* SDRAM_SDTR3 */
+ mtsdram_as(SDRAM_SDTR3,0x080b0d1a);
+
+ mtsdram_as(SDRAM_MMODE, 0x00000442);
+ mtsdram_as(SDRAM_MEMODE, 0x00000404);
+
+ /* SDRAM0_MCOPT1 (0X20) No ECC Gen */
+ mtsdram_as(SDRAM_MCOPT1, 0x04322000);
+
+ /* NOP */
+ mtsdram_as(SDRAM_INITPLR0, 0xa8380000);
+ /* precharge 3 DDR clock cycle */
+ mtsdram_as(SDRAM_INITPLR1, 0x81900400);
+ /* EMR2 twr = 2tck */
+ mtsdram_as(SDRAM_INITPLR2, 0x81020000);
+ /* EMR3 twr = 2tck */
+ mtsdram_as(SDRAM_INITPLR3, 0x81030000);
+ /* EMR DLL ENABLE twr = 2tck */
+ mtsdram_as(SDRAM_INITPLR4, 0x81010404);
+ /* MR w/ DLL reset
+ * Note: 5 is CL. May need to be changed
+ */
+ mtsdram_as(SDRAM_INITPLR5, 0x81000542);
+ /* precharge 3 DDR clock cycle */
+ mtsdram_as(SDRAM_INITPLR6, 0x81900400);
+ /* Auto-refresh trfc = 26tck */
+ mtsdram_as(SDRAM_INITPLR7, 0x8D080000);
+ /* Auto-refresh trfc = 26tck */
+ mtsdram_as(SDRAM_INITPLR8, 0x8D080000);
+ /* Auto-refresh */
+ mtsdram_as(SDRAM_INITPLR9, 0x8D080000);
+ /* Auto-refresh */
+ mtsdram_as(SDRAM_INITPLR10, 0x8D080000);
+ /* MRS - normal operation; wait 2 cycle (set wait to tMRD) */
+ mtsdram_as(SDRAM_INITPLR11, 0x81000442);
+ mtsdram_as(SDRAM_INITPLR12, 0x81010780);
+ mtsdram_as(SDRAM_INITPLR13, 0x81010400);
+ mtsdram_as(SDRAM_INITPLR14, 0x00000000);
+ mtsdram_as(SDRAM_INITPLR15, 0x00000000);
+
+ /* SET MCIF0_CODT Die Termination On */
+ mtsdram_as(SDRAM_CODT, 0x0080f837);
+ mtsdram_as(SDRAM_MODT0, 0x01800000);
+ mtsdram_as(SDRAM_MODT1, 0x00000000);
+
+ mtsdram_as(SDRAM_WRDTR, 0x00000000);
+
+ /* SDRAM0_MCOPT2 (0X21) Start initialization */
+ mtsdram_as(SDRAM_MCOPT2, 0x20000000);
+
+ /* Step 5 */
+ lis r3,0x1 /* 400000 = wait 100ms */
+ mtctr r3
+
+pll_wait:
+ bdnz pll_wait
+
+ /* Step 6 */
+
+ /* SDRAM_DLCR */
+ mtsdram_as(SDRAM_DLCR,0x030000a5);
+
+ /* SDRAM_RDCC */
+ mtsdram_as(SDRAM_RDCC,0x40000000);
+
+ /* SDRAM_RQDC */
+ mtsdram_as(SDRAM_RQDC,0x80000038);
+
+ /* SDRAM_RFDC */
+ mtsdram_as(SDRAM_RFDC,0x00000209);
+
+ /* Enable memory controller */
+ mtsdram_as(SDRAM_MCOPT2, 0x28000000);
+
+ blr