ppc4xx: Add initial AMCC Makalu 405EX support

Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 154 insertions, 0 deletions

diff --git a/board/amcc/makalu/init.S b/board/amcc/makalu/init.S
new file mode 100644
index 0000000000..806f5fdee2
--- /dev/null
+++ b/board/amcc/makalu/init.S
@@ -0,0 +1,154 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * Based on code provided from Senao 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 */
+
+	/* base=00000000, size=128MByte (5), mode=2 (n*10*4) */
+	mtsdram_as(SDRAM_MB0CF, 0x00005201);
+
+	/* 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);
+#if 0 /* test-only: not sure if 0 is ok when 2nd bank is used */
+	mtsdram_as(SDRAM_MODT1, 0x00000000);
+#endif
+
+	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