ppc4xx: Add initial AMCC Makalu 405EX support
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/makalu/memory.c b/board/amcc/makalu/memory.c
new file mode 100644
index 0000000..b03b60b
--- /dev/null
+++ b/board/amcc/makalu/memory.c
@@ -0,0 +1,188 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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 <common.h>
+#include <asm/processor.h>
+
+void sdram_init(void)
+{
+ return;
+}
+
+long int initdram(int board_type)
+{
+ /*
+ * Same as on Kilauea, Makalu generates exception 0x200
+ * (machine check) after trap_init() in board_init_f,
+ * when SDRAM is initialized here (late) and d-cache is
+ * used earlier as INIT_RAM.
+ * So for now, initialize DDR2 in init.S very early and
+ * also use it for INIT_RAM. Then this exception doesn't
+ * occur.
+ */
+#if 0
+ u32 val;
+
+ /* base=00000000, size=128MByte (5), mode=2 (n*10*4) */
+ mtsdram(SDRAM_MB0CF, 0x00005201);
+
+ /* SET SDRAM_MB1CF - Not enabled */
+ mtsdram(SDRAM_MB1CF, 0x00000000);
+
+ /* SET SDRAM_MB2CF - Not enabled */
+ mtsdram(SDRAM_MB2CF, 0x00000000);
+
+ /* SET SDRAM_MB3CF - Not enabled */
+ mtsdram(SDRAM_MB3CF, 0x00000000);
+
+ /* SDRAM_CLKTR: Adv Addr clock by 90 deg */
+ mtsdram(SDRAM_CLKTR, 0x80000000);
+
+ /* Refresh Time register (0x30) Refresh every 7.8125uS */
+ mtsdram(SDRAM_RTR, 0x06180000);
+
+ /* SDRAM_SDTR1 */
+ mtsdram(SDRAM_SDTR1, 0x80201000);
+
+ /* SDRAM_SDTR2 */
+ mtsdram(SDRAM_SDTR2, 0x32204232);
+
+ /* SDRAM_SDTR3 */
+ mtsdram(SDRAM_SDTR3, 0x080b0d1a);
+
+ mtsdram(SDRAM_MMODE, 0x00000442);
+ mtsdram(SDRAM_MEMODE, 0x00000404);
+
+ /* SDRAM0_MCOPT1 (0X20) No ECC Gen */
+ mtsdram(SDRAM_MCOPT1, 0x04322000);
+
+ /* NOP */
+ mtsdram(SDRAM_INITPLR0, 0xa8380000);
+ /* precharge 3 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR1, 0x81900400);
+ /* EMR2 twr = 2tck */
+ mtsdram(SDRAM_INITPLR2, 0x81020000);
+ /* EMR3 twr = 2tck */
+ mtsdram(SDRAM_INITPLR3, 0x81030000);
+ /* EMR DLL ENABLE twr = 2tck */
+ mtsdram(SDRAM_INITPLR4, 0x81010404);
+ /* MR w/ DLL reset
+ * Note: 5 is CL. May need to be changed
+ */
+ mtsdram(SDRAM_INITPLR5, 0x81000542);
+ /* precharge 3 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR6, 0x81900400);
+ /* Auto-refresh trfc = 26tck */
+ mtsdram(SDRAM_INITPLR7, 0x8D080000);
+ /* Auto-refresh trfc = 26tck */
+ mtsdram(SDRAM_INITPLR8, 0x8D080000);
+ /* Auto-refresh */
+ mtsdram(SDRAM_INITPLR9, 0x8D080000);
+ /* Auto-refresh */
+ mtsdram(SDRAM_INITPLR10, 0x8D080000);
+ /* MRS - normal operation; wait 2 cycle (set wait to tMRD) */
+ mtsdram(SDRAM_INITPLR11, 0x81000442);
+ mtsdram(SDRAM_INITPLR12, 0x81010780);
+ mtsdram(SDRAM_INITPLR13, 0x81010400);
+ mtsdram(SDRAM_INITPLR14, 0x00000000);
+ mtsdram(SDRAM_INITPLR15, 0x00000000);
+
+ /* SET MCIF0_CODT Die Termination On */
+ mtsdram(SDRAM_CODT, 0x0080f837);
+ mtsdram(SDRAM_MODT0, 0x01800000);
+ mtsdram(SDRAM_MODT1, 0x00000000);
+
+ mtsdram(SDRAM_WRDTR, 0x00000000);
+
+ /* SDRAM0_MCOPT2 (0X21) Start initialization */
+ mtsdram(SDRAM_MCOPT2, 0x20000000);
+
+ /* Step 5 */
+ do {
+ mfsdram(SDRAM_MCSTAT, val);
+ } while ((val & SDRAM_MCSTAT_MIC_COMP) != SDRAM_MCSTAT_MIC_COMP);
+
+ /* Step 6 */
+
+ /* SDRAM_DLCR */
+ mtsdram(SDRAM_DLCR, 0x030000a5);
+
+ /* SDRAM_RDCC */
+ mtsdram(SDRAM_RDCC, 0x40000000);
+
+ /* SDRAM_RQDC */
+ mtsdram(SDRAM_RQDC, 0x80000038);
+
+ /* SDRAM_RFDC */
+ mtsdram(SDRAM_RFDC, 0x00000209);
+
+ /* Enable memory controller */
+ mfsdram(SDRAM_MCOPT2, val);
+ val |= SDRAM_MCOPT2_DCEN_ENABLE;
+ mtsdram(SDRAM_MCOPT2, val);
+#endif
+ return (CFG_MBYTES_SDRAM << 20);
+}
+
+#if defined(CFG_DRAM_TEST)
+int testdram (void)
+{
+ printf ("testdram\n");
+#if defined (CONFIG_NAND_U_BOOT)
+ return 0;
+#endif
+ uint *pstart = (uint *) 0x00000000;
+ uint *pend = (uint *) 0x00001000;
+ uint *p;
+
+ for (p = pstart; p < pend; p++) {
+ *p = 0xaaaaaaaa;
+ }
+
+ for (p = pstart; p < pend; p++) {
+ if (*p != 0xaaaaaaaa) {
+#if !defined (CONFIG_NAND_SPL)
+ printf ("SDRAM test fails at: %08x\n", (uint) p);
+#endif
+ return 1;
+ }
+ }
+
+ for (p = pstart; p < pend; p++) {
+ *p = 0x55555555;
+ }
+
+ for (p = pstart; p < pend; p++) {
+ if (*p != 0x55555555) {
+#if !defined (CONFIG_NAND_SPL)
+ printf ("SDRAM test fails at: %08x\n", (uint) p);
+#endif
+ return 1;
+ }
+ }
+#if !defined (CONFIG_NAND_SPL)
+ printf ("SDRAM test passed!!!\n");
+#endif
+ return 0;
+}
+#endif