Patch by Raghu Krishnaprasad, 7 Aug 2003:

add support for Adder II MPC852T module

1 files changed, 189 insertions, 0 deletions

diff --git a/board/adderII/adderII.c b/board/adderII/adderII.c
new file mode 100644
index 0000000..d398e54
--- /dev/null
+++ b/board/adderII/adderII.c
@@ -0,0 +1,189 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@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 <config.h>
+#include <mpc8xx.h>
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard( void )
+{
+	puts("Board: ");
+	puts("AdderII(MPC852T)\n" );
+
+  	return 0;
+}
+
+#if defined( CONFIG_SDRAM_50MHZ )
+
+/******************************************************************************
+** for chip Samsung K4S643232F - T70
+** this table is for 32-50MHz operation
+*******************************************************************************/
+
+#define SDRAM_MPTPRVALUE 	0x0200
+
+#define SDRAM_MAMRVALUE0 	0x00802114   /* refresh at 32MHz */
+#define SDRAM_MAMRVALUE1 	0x00802118
+
+#define SDRAM_OR1VALUE   	0xff800e00
+#define SDRAM_BR1VALUE   	0x00000081
+
+#define SDRAM_MARVALUE		94
+
+#define SDRAM_MCRVALUE0  	0x80808105
+#define SDRAM_MCRVALUE1  	0x80808130
+
+const uint sdram_table[] = {
+
+	/* single read   (offset 0x00 in upm ram) */
+       	0x1f07fc24, 0xe0aefc04, 0x10adfc04, 0xe0bbbc00,
+       	0x10f77c44, 0xf3fffc07, 0xfffffc04, 0xfffffc04,
+
+	/* burst read    (offset 0x08 in upm ram) */
+       	0x1f07fc24, 0xe0aefc04, 0x10adfc04, 0xf0affc00,
+       	0xf0affc00, 0xf0affc00, 0xf0affc00, 0x10a77c44,
+       	0xf7bffc47, 0xfffffc35, 0xfffffc34, 0xfffffc35,
+       	0xfffffc35, 0x1ff77c35, 0xfffffc34, 0x1fb57c35,
+
+	/* single write  (offset 0x18 in upm ram) */
+       	0x1f27fc24, 0xe0aebc04, 0x00b93c00, 0x13f77c47,
+       	0xfffdfc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+
+	/* burst write   (offset 0x20 in upm ram) */
+       	0x1f07fc24, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
+       	0xf0affc00, 0xe0abbc00, 0x1fb77c47, 0xfffffc04,
+       	0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+       	0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+
+	/* refresh       (offset 0x30 in upm ram) */
+       	0x1ff5fca4, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+       	0xfffffc84, 0xfffffc07, 0xfffffc04, 0xfffffc04,
+       	0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+
+	/* exception     (offset 0x3C in upm ram) */
+       	0xfffffc27, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+};
+
+#else
+#error SDRAM not correctly configured
+#endif
+
+int _initsdram (uint base, uint noMbytes)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+	if (noMbytes != 8) {
+		return -1;
+	}
+
+	upmconfig (UPMA, (uint *) sdram_table,
+		   sizeof (sdram_table) / sizeof (uint));
+
+	memctl->memc_mptpr = SDRAM_MPTPRVALUE;
+
+	/* Configure the refresh (mostly).  This needs to be
+	 * based upon processor clock speed and optimized to provide
+	 * the highest level of performance.  For multiple banks,
+	 * this time has to be divided by the number of banks.
+	 * Although it is not clear anywhere, it appears the
+	 * refresh steps through the chip selects for this UPM
+	 * on each refresh cycle.
+	 * We have to be careful changing
+	 * UPM registers after we ask it to run these commands.
+	 */
+
+	memctl->memc_mamr = (SDRAM_MAMRVALUE0 | (SDRAM_MARVALUE << 24));
+	memctl->memc_mar = 0x0;
+	udelay (200);
+
+	/* Now run the precharge/nop/mrs commands.
+	 */
+	memctl->memc_mcr = 0x80002115;
+	udelay (200);
+
+	/* Run 8 refresh cycles */
+	memctl->memc_mcr = 0x80002380;
+	udelay (200);
+
+	memctl->memc_mar = 0x88;
+	udelay (200);
+
+	memctl->memc_mcr = 0x80002116;
+	udelay (200);
+
+	memctl->memc_or1 = SDRAM_OR1VALUE;
+	memctl->memc_br1 = SDRAM_BR1VALUE | base;
+
+	return 0;
+}
+
+void _sdramdisable( void )
+{
+	volatile immap_t     *immap = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+	memctl->memc_br1 = 0x00000000;
+
+	/* maybe we should turn off upma here or something */
+}
+
+int initsdram (uint base, uint * noMbytes)
+{
+	uint m = 8;
+
+	*noMbytes = m;
+
+	if (!_initsdram (base, m)) {
+		return 0;
+	} else {
+		_sdramdisable ();
+		return -1;
+	}
+}
+
+long int initdram (int board_type)
+{
+	/* AdderII: has 8MB SDRAM */
+	uint sdramsz;
+	uint m = 0;
+
+	if (!initsdram (0x00000000, &sdramsz)) {
+		m += sdramsz;
+	} else {
+		return -1;
+	}
+	return (m << 20);
+}
+
+int testdram (void)
+{
+	/* TODO: XXX XXX XXX not an actual SDRAM test */
+	printf ("Test: 8MB SDRAM\n");
+
+	return (0);
+}