Initial revision

1 files changed, 236 insertions, 0 deletions

diff --git a/board/lantec/lantec.c b/board/lantec/lantec.c
new file mode 100644
index 0000000..812f65a
--- /dev/null
+++ b/board/lantec/lantec.c
@@ -0,0 +1,236 @@
+/*
+ * (C) Copyright 2000, 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) Copyright 2001
+ * Torsten Stevens, FHG IMS, stevens@ims.fhg.de
+ * Bruno Achauer, Exet AG, bruno@exet-ag.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
+ */
+
+/*
+ * Derived from ../tqm8xx/tqm8xx.c
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+/* ------------------------------------------------------------------------- */
+
+static long int dram_size (long int, long int *, long int);
+
+/* ------------------------------------------------------------------------- */
+
+#define	_NOT_USED_	0xFFFFFFFF
+
+const uint sdram_table[] =
+{
+	/*
+	 * Single Read. (Offset 0 in UPMA RAM)
+	 */
+	0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
+	0x1ff77c47, /* last */
+	/*
+	 * SDRAM Initialization (offset 5 in UPMA RAM)
+	 *
+	 * This is no UPM entry point. The following definition uses
+	 * the remaining space to establish an initialization
+	 * sequence, which is executed by a RUN command.
+	 *
+	 */
+	0x1ff77c35, 0xefeabc34, 0x1fb57c35, /* last */
+	/*
+	 * Burst Read. (Offset 8 in UPMA RAM)
+	 */
+	0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
+	0xf0affc00, 0xf1affc00,	0xefbbbc00, 0x1ff77c47, /* last */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Single Write. (Offset 18 in UPMA RAM)
+	 */
+ 	0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47, /* last */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Burst Write. (Offset 20 in UPMA RAM)
+	 */
+	0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
+	0xf0affc00, 0xe1bbbc04, 0x1ff77c47, /* last */
+					    _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Refresh  (Offset 30 in UPMA RAM)
+	 */
+	0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+	0xfffffc84, 0xfffffc07, 0xfffffc07, /* last */
+					    _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Exception. (Offset 3c in UPMA RAM)
+	 */
+	0x7ffffc07, /* last */
+		    _NOT_USED_, _NOT_USED_, _NOT_USED_,
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ *
+ * Test TQ ID string (TQM8xx...)
+ * If present, check for "L" type (no second DRAM bank),
+ * otherwise "L" type is assumed as default.
+ *
+ * Return 1 for "L" type, 0 else.
+ */
+
+int checkboard (void)
+{
+	printf("Board: Lantec special edition rev.%d\n", CONFIG_LANTEC);
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+long int initdram (int board_type)
+{
+	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	long int size_b0;
+	int i;
+
+	/*
+	 * Configure UPMA for SDRAM
+	 */
+	upmconfig(UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
+
+	memctl->memc_mptpr = CFG_MPTPR_1BK_8K /* XXX CFG_MPTPR XXX */;
+
+	/* burst length=4, burst type=sequential, CAS latency=2 */
+	memctl->memc_mar = 0x00000088;
+
+	/*
+	* Map controller bank 3 to the SDRAM bank at preliminary address.
+	*/
+	memctl->memc_or3 = CFG_OR3_PRELIM;
+	memctl->memc_br3 = CFG_BR3_PRELIM;
+
+	/* initialize memory address register */
+	memctl->memc_mamr = CFG_MAMR_8COL;	/* refresh not enabled yet */
+
+	/* mode initialization (offset 5) */
+	udelay(200);	/* 0x80006105 */
+	memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF(1) | MCR_MAD(0x05);
+
+	/* run 2 refresh sequence with 4-beat refresh burst (offset 0x30) */
+	udelay(1);		/* 0x80006130 */
+	memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF(1) | MCR_MAD(0x30);
+	udelay(1);		/* 0x80006130 */
+	memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF(1) | MCR_MAD(0x30);
+
+	udelay(1);		/* 0x80006106 */
+	memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF(1) | MCR_MAD(0x06);
+
+	memctl->memc_mamr |= MAMR_PTBE;	/* refresh enabled */
+
+	udelay(200);
+
+	/* Need at least 10 DRAM accesses to stabilize */
+	for (i=0; i<10; ++i) {
+		volatile unsigned long *addr = \
+				(volatile unsigned long *)SDRAM_BASE3_PRELIM;
+		unsigned long val;
+
+		val = *(addr + i);
+		*(addr + i) = val;
+	}
+
+	/*
+	* Check Bank 0 Memory Size for re-configuration
+	*/
+	size_b0 = dram_size (CFG_MAMR_8COL,
+			     (ulong *)SDRAM_BASE3_PRELIM,
+			     SDRAM_MAX_SIZE);
+
+	memctl->memc_mamr = CFG_MAMR_8COL | MAMR_PTBE;
+
+	/*
+	 * Final mapping:
+	 */
+
+	memctl->memc_or3 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+	memctl->memc_br3 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+	udelay(1000);
+
+	return (size_b0);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check memory range for valid RAM. A simple memory test determines
+ * the actually available RAM size between addresses `base' and
+ * `base + maxsize'. Some (not all) hardware errors are detected:
+ * - short between address lines
+ * - short between data lines
+ */
+
+static long int dram_size (long int mamr_value, long int *base, long int maxsize)
+{
+    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+    volatile memctl8xx_t *memctl = &immap->im_memctl;
+    volatile long int	 *addr;
+    ulong		  cnt, val;
+    ulong		  save[32];	/* to make test non-destructive */
+    unsigned char	  i = 0;
+
+    memctl->memc_mamr = mamr_value;
+
+    for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) {
+	addr = base + cnt;	/* pointer arith! */
+
+	save[i++] = *addr;
+	*addr = ~cnt;
+    }
+
+    /* write 0 to base address */
+    addr = base;
+    save[i] = *addr;
+    *addr = 0;
+
+    /* check at base address */
+    if ((val = *addr) != 0) {
+	*addr = save[i];
+	return (0);
+    }
+
+    for (cnt = 1; cnt <= maxsize/sizeof(long); cnt <<= 1) {
+	addr = base + cnt;	/* pointer arith! */
+
+	val = *addr;
+	*addr = save[--i];
+
+	if (val != (~cnt)) {
+	    return (cnt * sizeof(long));
+	}
+    }
+    return (maxsize);
+}