Patch by Wolter Kamphuis, 05 Dec 2003:

Add support for SNMC's QS850/QS823/QS860T boards

1 files changed, 259 insertions, 0 deletions

diff --git a/board/snmc/qs860t/qs860t.c b/board/snmc/qs860t/qs860t.c
new file mode 100644
index 0000000..c4ab758
--- /dev/null
+++ b/board/snmc/qs860t/qs860t.c
@@ -0,0 +1,259 @@
+/*
+ * (C) Copyright 2003
+ * MuLogic B.V.
+ *
+ * (C) Copyright 2002
+ * Simple Network Magic Corporation, dnevil@snmc.com
+ *
+ * (C) Copyright 2000
+ * 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 <asm/u-boot.h>
+#include <commproc.h>
+#include "mpc8xx.h"
+
+/* ------------------------------------------------------------------------- */
+
+static long  int dram_size (long int, long int *, long int);
+
+/* ------------------------------------------------------------------------- */
+
+const uint sdram_table[] =
+{
+	/*
+	 * Single Read. (Offset 0 in UPMA RAM)
+	 */
+	0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00,
+	0x1FF77C47, 0x1FF77C35, 0xEFEABC34, 0x1FB57C35,
+	/*
+	 * Burst Read. (Offset 8 in UPMA RAM)
+	 */
+	0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00,
+	0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47,
+	0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04,
+	0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04,
+	/*
+	 * Single Write. (Offset 18 in UPMA RAM)
+	 */
+	0x1F27FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47,
+	0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04,
+	/*
+	 * Burst Write. (Offset 20 in UPMA RAM)
+	 */
+	0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00,
+	0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47, 0xFFFFEC04,
+	0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04,
+	0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04,
+	/*
+	 * Refresh  (Offset 30 in UPMA RAM)
+	 */
+	0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC84, 0xFFFFFC07, 0xFFFFEC04, 0xFFFFEC04,
+	0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04,
+	/*
+	 * Exception. (Offset 3c in UPMA RAM)
+	 */
+	0x7FFFFC07, 0xFFFFEC04, 0xFFFFEC04, 0xFFFFEC04
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ *
+ * Test ID string (QS860T...)
+ *
+ * Always return 1
+ */
+
+int checkboard (void)
+{
+	unsigned char *s, *e;
+	unsigned char buf[64];
+	int i;
+
+	i = getenv_r("serial#", buf, sizeof(buf));
+	s = (i>0) ? buf : NULL;
+
+	if (!s || strncmp(s, "QS860T", 6)) {
+		puts ("### No HW ID - assuming QS860T");
+	} else {
+		for (e=s; *e; ++e) {
+			if (*e == ' ')
+			break;
+		}
+
+		for ( ; s<e; ++s) {
+			putc (*s);
+		}
+	}
+	putc ('\n');
+
+	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;
+
+	upmconfig(UPMB, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
+
+	/*
+	* Prescaler for refresh
+	*/
+	memctl->memc_mptpr = 0x0400;
+
+	/*
+	* Map controller bank 2 to the SDRAM address
+	*/
+	memctl->memc_or2 = CFG_OR2;
+	memctl->memc_br2 = CFG_BR2;
+	udelay(200);
+
+	/* perform SDRAM initialization sequence */
+	memctl->memc_mbmr = CFG_16M_MBMR;
+	udelay(100);
+
+	memctl->memc_mar  = 0x00000088;
+	memctl->memc_mcr  = 0x80804105;	/* run precharge pattern */
+	udelay(1);
+
+	/* Run two refresh cycles on SDRAM */
+	memctl->memc_mbmr = 0x18802118;
+	memctl->memc_mcr  = 0x80804130;
+	memctl->memc_mbmr = 0x18802114;
+	memctl->memc_mcr  = 0x80804106;
+
+	udelay (1000);
+
+#if 0
+	/*
+	* Check for 64M SDRAM Memory Size
+	*/
+	size = dram_size (CFG_64M_MBMR, (ulong *)SDRAM_BASE, SDRAM_64M_MAX_SIZE);
+	udelay (1000);
+
+	/*
+	* Check for 16M SDRAM Memory Size
+	*/
+	if (size != SDRAM_64M_MAX_SIZE) {
+#endif
+	size = dram_size (CFG_16M_MBMR, (ulong *)SDRAM_BASE, SDRAM_16M_MAX_SIZE);
+	udelay (1000);
+#if 0
+	}
+
+	memctl->memc_or2 = ((-size) & 0xFFFF0000) | SDRAM_TIMING;
+#endif
+
+
+	udelay(10000);
+
+
+#if 0
+
+	/*
+	* Also, map other memory to correct position
+	*/
+
+	/*
+	* Map the 8M Intel Flash device to chip select 1
+	*/
+	memctl->memc_or1 = CFG_OR1;
+	memctl->memc_br1 = CFG_BR1;
+
+
+	/*
+	* Map 64K NVRAM, Sipex Device, NAND Ctl Reg, and LED Ctl Reg
+	* to chip select 3
+	*/
+	memctl->memc_or3 = CFG_OR3;
+	memctl->memc_br3 = CFG_BR3;
+
+	/*
+	* Map chip selects 4, 5, 6, & 7 for external expansion connector
+	*/
+	memctl->memc_or4 = CFG_OR4;
+	memctl->memc_br4 = CFG_BR4;
+
+	memctl->memc_or5 = CFG_OR5;
+	memctl->memc_br5 = CFG_BR5;
+
+	memctl->memc_or6 = CFG_OR6;
+	memctl->memc_br6 = CFG_BR6;
+
+	memctl->memc_or7 = CFG_OR7;
+	memctl->memc_br7 = CFG_BR7;
+
+#endif
+
+	return (size);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * 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 mbmr_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;
+	long int cnt, val;
+
+	memctl->memc_mbmr = mbmr_value;
+
+	for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) {
+		addr = base + cnt;	/* pointer arith! */
+		*addr = ~cnt;
+	}
+
+	/* write 0 to base address */
+	addr = base;
+	*addr = 0;
+
+	/* check at base address */
+	if ((val = *addr) != 0) {
+		return (0);
+	}
+
+	for (cnt = 1; ; cnt <<= 1) {
+		addr = base + cnt;	/* pointer arith! */
+		val = *addr;
+		if (val != (~cnt)) {
+			return (cnt * sizeof(long));
+		}
+	}
+	/* NOTREACHED */
+}