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authorwdenk <wdenk>2002-08-26 21:58:50 +0000
committerwdenk <wdenk>2002-08-26 21:58:50 +0000
commit16f217049a70da97bc61eff7a95b4b6313850909 (patch)
tree4c9c0b416828b4215b10d152aac432b449a11f05 /board/ip860/ip860.c
parent354bc6feac2cf549c51c2f36e2a374438af4e9c1 (diff)
Initial revision
Diffstat (limited to 'board/ip860/ip860.c')
-rw-r--r--board/ip860/ip860.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/board/ip860/ip860.c b/board/ip860/ip860.c
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+/*
+ * (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 <commproc.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.
+ *
+ */
+ 0x1ff77c34, 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, /* last */
+ _NOT_USED_, _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 ID string (IP860...)
+ */
+
+int checkboard (void)
+{
+ unsigned char *s, *e;
+ unsigned char buf[64];
+ int i;
+
+ puts ("Board: ");
+
+ i = getenv_r ("serial#", buf, sizeof (buf));
+ s = (i > 0) ? buf : NULL;
+
+ if (!s || strncmp (s, "IP860", 5)) {
+ puts ("### No HW ID - assuming IP860");
+ } 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 (UPMA, (uint *) sdram_table,
+ sizeof (sdram_table) / sizeof (uint));
+
+ /*
+ * Preliminary prescaler for refresh
+ */
+ memctl->memc_mptpr = 0x0400;
+
+ memctl->memc_mar = 0x00000088;
+
+ /*
+ * Map controller banks 2 to the SDRAM address
+ */
+ memctl->memc_or2 = CFG_OR2;
+ memctl->memc_br2 = CFG_BR2;
+
+ /* IP860 boards have only one bank SDRAM */
+
+
+ udelay (200);
+
+ /* perform SDRAM initializsation sequence */
+
+ memctl->memc_mamr = 0xC3804114;
+ memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */
+ udelay (1);
+ memctl->memc_mamr = 0xC3804118;
+ memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */
+
+ udelay (1000);
+
+ /*
+ * Check SDRAM Memory Size
+ */
+ size = dram_size (CFG_MAMR, (ulong *) SDRAM_BASE, SDRAM_MAX_SIZE);
+
+ udelay (1000);
+
+ memctl->memc_or2 = ((-size) & 0xFFFF0000) | SDRAM_TIMING;
+ memctl->memc_br2 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+
+ udelay (10000);
+
+ /*
+ * Also, map other memory to correct position
+ */
+
+#if (defined(CFG_OR1) && defined(CFG_BR1_PRELIM))
+ memctl->memc_or1 = CFG_OR1;
+ memctl->memc_br1 = CFG_BR1;
+#endif
+
+#if defined(CFG_OR3) && defined(CFG_BR3)
+ memctl->memc_or3 = CFG_OR3;
+ memctl->memc_br3 = CFG_BR3;
+#endif
+
+#if defined(CFG_OR4) && defined(CFG_BR4)
+ memctl->memc_or4 = CFG_OR4;
+ memctl->memc_br4 = CFG_BR4;
+#endif
+
+#if defined(CFG_OR5) && defined(CFG_BR5)
+ memctl->memc_or5 = CFG_OR5;
+ memctl->memc_br5 = CFG_BR5;
+#endif
+
+#if defined(CFG_OR6) && defined(CFG_BR6)
+ memctl->memc_or6 = CFG_OR6;
+ memctl->memc_br6 = CFG_BR6;
+#endif
+
+#if defined(CFG_OR7) && defined(CFG_BR7)
+ 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 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);
+}
+
+/* ------------------------------------------------------------------------- */
+
+void reset_phy (void)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ ulong mask = PB_ENET_RESET | PB_ENET_JABD;
+ ulong reg;
+
+ /* Make sure PHY is not in low-power mode */
+ immr->im_cpm.cp_pbpar &= ~(mask); /* GPIO */
+ immr->im_cpm.cp_pbodr &= ~(mask); /* active output */
+
+ /* Set JABD low (no JABber Disable),
+ * and RESET high (Reset PHY)
+ */
+ reg = immr->im_cpm.cp_pbdat;
+ reg = (reg & ~PB_ENET_JABD) | PB_ENET_RESET;
+ immr->im_cpm.cp_pbdat = reg;
+
+ /* now drive outputs */
+ immr->im_cpm.cp_pbdir |= mask; /* output */
+ udelay (1000);
+ /*
+ * Release RESET signal
+ */
+ immr->im_cpm.cp_pbdat &= ~(PB_ENET_RESET);
+ udelay (1000);
+}
+
+/* ------------------------------------------------------------------------- */