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-rw-r--r--board/etx094/etx094.c418
1 files changed, 418 insertions, 0 deletions
diff --git a/board/etx094/etx094.c b/board/etx094/etx094.c
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+++ b/board/etx094/etx094.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 <mpc8xx.h>
+
+/* ------------------------------------------------------------------------- */
+
+static long int dram_size (long int, long int *, long int);
+static void read_hw_vers (void);
+
+/* ------------------------------------------------------------------------- */
+
+#define _NOT_USED_ 0xFFFFFFFF
+
+const uint sdram_table[] = {
+
+ /* single read (offset 0x00 in upm ram) */
+
+ 0xEECEFC24, 0x100DFC24, 0xE02FBC04, 0x01AA7C04,
+ 0x1FB5FC00, 0xFFFFFC05, _NOT_USED_, _NOT_USED_,
+
+ /* burst read (offset 0x08 in upm ram) */
+
+ 0xEECEFC24, 0x100DFC24, 0xE0FFBC04, 0x10FF7C04,
+ 0xF0FFFC00, 0xF0FFFC00, 0xF0FFFC00, 0xFFFFFC00,
+ 0xFFFFFC05, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+ /* single write (offset 0x18 in upm ram) */
+
+ 0xEECEFC24, 0x100DFC24, 0xE02BBC04, 0x01A27C00,
+ 0xEFAAFC04, 0x1FB5FC05, _NOT_USED_, _NOT_USED_,
+
+ /* burst write (offset 0x20 in upm ram) */
+
+ 0xEECEFC24, 0x103DFC24, 0xE0FBBC00, 0x10F77C00,
+ 0xF0FFFC00, 0xF0FFFC00, 0xF0FFFC04, 0xFFFFFC05,
+
+ /* init part1 (offset 0x28 in upm ram) */
+
+ 0xEFFAFC3C, 0x1FF4FC34, 0xEFFCBC34, 0x1FFC3C34,
+ 0xFFFC3C35, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+ /* refresh (offset 0x30 in upm ram) */
+
+ 0xEFFEBC0C, 0x1FFD7C04, 0xFFFFFC04, 0xFFFFFC05,
+
+ /* init part2 (offset 0x34 in upm ram) */
+
+ 0xFFFEBC04, 0xEFFC3CB4, 0x1FFC3C34, 0xFFFC3C34,
+ 0xFFFC3C34, 0xEFE83CB4, 0x1FB57C35, _NOT_USED_,
+
+ /* exception (offset 0x3C in upm ram) */
+
+ 0xFFFFFC05, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ *
+ * Test ETX ID string (ETX_xxx...)
+ *
+ * Return 1 always.
+ */
+
+int checkboard (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ unsigned char *s = getenv ("serial#");
+ unsigned char *e;
+
+ puts ("Board: ");
+
+#ifdef SB_ETX094
+ gd->board_type = 0; /* 0 = 2SDRAM-Device */
+#else
+ gd->board_type = 1; /* 1 = 1SDRAM-Device */
+#endif
+
+ if (!s || strncmp (s, "ETX_", 4)) {
+ puts ("### No HW ID - assuming ETX_094\n");
+ read_hw_vers ();
+ return (0);
+ }
+
+ for (e = s; *e; ++e) {
+ if (*e == ' ')
+ break;
+ }
+
+ for (; s < e; ++s) {
+ putc (*s);
+ }
+ putc ('\n');
+
+ read_hw_vers ();
+ 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, size_b1, size8, size9;
+
+ upmconfig (UPMA, (uint *) sdram_table,
+ sizeof (sdram_table) / sizeof (uint));
+
+ /*
+ * Preliminary prescaler for refresh (depends on number of
+ * banks): This value is selected for four cycles every 62.4 us
+ * with two SDRAM banks or four cycles every 31.2 us with one
+ * bank. It will be adjusted after memory sizing.
+ */
+ memctl->memc_mptpr = CFG_MPTPR_1BK_4K; /* MPTPR_PTP_DIV32 0x0200 */
+
+ /* A3(SDRAM)=0 => Bursttype = Sequential
+ * A2-A0(SDRAM)=010 => Burst length = 4
+ * A4-A6(SDRAM)=010 => CasLat=2
+ */
+ memctl->memc_mar = 0x00000088;
+
+ /*
+ * Map controller banks 2 and 3 to the SDRAM banks 2 and 3 at
+ * preliminary addresses - these have to be modified after the
+ * SDRAM size has been determined.
+ */
+ memctl->memc_or2 = CFG_OR2_PRELIM;
+ memctl->memc_br2 = CFG_BR2_PRELIM;
+
+ if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
+ memctl->memc_or3 = CFG_OR3_PRELIM;
+ memctl->memc_br3 = CFG_BR3_PRELIM;
+ }
+
+ memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
+
+ udelay (200);
+
+ /* perform SDRAM initializsation sequence */
+
+ memctl->memc_mcr = 0x80004128; /* SDRAM bank 0 (CS2) - Init Part 1 */
+ memctl->memc_mcr = 0x80004734; /* SDRAM bank 0 (CS2) - Init Part 2 */
+ udelay (1);
+
+ if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
+ memctl->memc_mcr = 0x80006128; /* SDRAM bank 1 (CS3) - Init Part 1 */
+ memctl->memc_mcr = 0x80006734; /* SDRAM bank 1 (CS3) - Init Part 2 */
+ udelay (1);
+ }
+
+ memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
+
+ udelay (1000);
+
+ /*
+ * Check Bank 0 Memory Size for re-configuration
+ *
+ * try 8 column mode
+ */
+ size8 = dram_size (CFG_MAMR_8COL, (ulong *) SDRAM_BASE2_PRELIM,
+ SDRAM_MAX_SIZE);
+
+ udelay (1000);
+
+ /*
+ * try 9 column mode
+ */
+ size9 = dram_size (CFG_MAMR_9COL, (ulong *) SDRAM_BASE2_PRELIM,
+ SDRAM_MAX_SIZE);
+
+ if (size8 < size9) { /* leave configuration at 9 columns */
+ size_b0 = size9;
+/* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */
+ } else { /* back to 8 columns */
+ size_b0 = size8;
+ memctl->memc_mamr = CFG_MAMR_8COL;
+ udelay (500);
+/* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */
+ }
+
+ if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
+ /*
+ * Check Bank 1 Memory Size
+ * use current column settings
+ * [9 column SDRAM may also be used in 8 column mode,
+ * but then only half the real size will be used.]
+ */
+ size_b1 =
+ dram_size (memctl->memc_mamr, (ulong *) SDRAM_BASE3_PRELIM,
+ SDRAM_MAX_SIZE);
+/* debug ("SDRAM Bank 1: %ld MB\n", size8 >> 20); */
+ } else {
+ size_b1 = 0;
+ }
+
+ udelay (1000);
+
+ /*
+ * Adjust refresh rate depending on SDRAM type, both banks
+ * For types > 128 MBit leave it at the current (fast) rate
+ */
+ if ((size_b0 < 0x02000000) && (size_b1 < 0x02000000)) {
+ /* reduce to 15.6 us (62.4 us / quad) */
+ memctl->memc_mptpr = CFG_MPTPR_2BK_4K; /*DIV16 */
+ udelay (1000);
+ }
+
+ /*
+ * Final mapping: map bigger bank first
+ */
+ if (size_b1 > size_b0) { /* SDRAM Bank 1 is bigger - map first */
+
+ memctl->memc_or3 = ((-size_b1) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+ memctl->memc_br3 =
+ (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+
+ if (size_b0 > 0) {
+ /*
+ * Position Bank 0 immediately above Bank 1
+ */
+ memctl->memc_or2 =
+ ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+ memctl->memc_br2 =
+ ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V)
+ + size_b1;
+ } else {
+ unsigned long reg;
+
+ /*
+ * No bank 0
+ *
+ * invalidate bank
+ */
+ memctl->memc_br2 = 0;
+
+ /* adjust refresh rate depending on SDRAM type, one bank */
+ reg = memctl->memc_mptpr;
+ reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
+ memctl->memc_mptpr = reg;
+ }
+
+ } else { /* SDRAM Bank 0 is bigger - map first */
+
+ memctl->memc_or2 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+ memctl->memc_br2 =
+ (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+
+ if (size_b1 > 0) {
+ /*
+ * Position Bank 1 immediately above Bank 0
+ */
+ memctl->memc_or3 =
+ ((-size_b1) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+ memctl->memc_br3 =
+ ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V)
+ + size_b0;
+ } else {
+ unsigned long reg;
+
+ /*
+ * No bank 1
+ *
+ * invalidate bank
+ */
+ memctl->memc_br3 = 0;
+
+ /* adjust refresh rate depending on SDRAM type, one bank */
+ reg = memctl->memc_mptpr;
+ reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
+ memctl->memc_mptpr = reg;
+ }
+ }
+
+ udelay (10000);
+
+ return (size_b0 + size_b1);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * 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);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/* HW-ID Table (Bits: 2^9;2^7;2^5) */
+#define HW_ID_0 0x0000
+#define HW_ID_1 0x0020
+#define HW_ID_2 0x0080
+#define HW_ID_3 0x00a0
+#define HW_ID_4 0x0200
+#define HW_ID_5 0x0220
+#define HW_ID_6 0x0280
+#define HW_ID_7 0x02a0
+
+void read_hw_vers ()
+{
+ unsigned short rd_msk = 0x02A0;
+
+ /* HW-ID pin-definition */
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+
+ immr->im_ioport.iop_pddir &= ~(rd_msk);
+ immr->im_ioport.iop_pdpar &= ~(rd_msk);
+
+ /* debug printf("State of PD: %x\n",immr->im_ioport.iop_pddat); */
+
+ /* Check the HW-ID */
+ printf ("HW-Version: ");
+ switch (immr->im_ioport.iop_pddat & rd_msk) {
+ case HW_ID_0:
+ printf ("V0.1 - V0.3 / W97238-Q3162-A1-1-2\n");
+ break;
+ case HW_ID_1:
+ printf ("V0.9 / W50037-Q1-D6-1\n");
+ break;
+ case HW_ID_2:
+ printf ("NOT USED - assuming ID#2\n");
+ break;
+ case HW_ID_3:
+ printf ("NOT USED - assuming ID#3\n");
+ break;
+ case HW_ID_4:
+ printf ("NOT USED - assuming ID#4\n");
+ break;
+ case HW_ID_5:
+ printf ("NOT USED - assuming ID#5\n");
+ break;
+ case HW_ID_6:
+ printf ("NOT USED - assuming ID#6\n");
+ break;
+ case HW_ID_7:
+ printf ("NOT USED - assuming ID#7\n");
+ break;
+ default:
+ printf ("###Error###\n");
+ break;
+ }
+}
+
+/* ------------------------------------------------------------------------- */
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