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+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Changes for MATRIX Vision MVsensor (C) Copyright 2001
+ * MATRIX Vision GmbH / hg, info@matrix-vision.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);
+
+/* ------------------------------------------------------------------------- */
+
+#define _NOT_USED_ 0xFFFFFFFF
+
+const uint sdram_table[] =
+{
+ /*
+ * Single Read. (Offset 0 in UPMA RAM)
+ */
+ 0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBAFC00,
+ 0x1FF5FC47, /* 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.
+ *
+ */
+ 0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
+ /*
+ * Burst Read. (Offset 8 in UPMA RAM)
+ */
+ 0x1F0DFC04, 0xEEAFBC04, 0x10AF7C04, 0xF0AFFC00,
+ 0xF0AFFC00, 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Single Write. (Offset 18 in UPMA RAM)
+ */
+ 0x1F0DFC04 /*0x1F2DFC04??*/, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Burst Write. (Offset 20 in UPMA RAM)
+ */
+ 0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
+ 0xF0AFFC00, 0xE1BAFC04, 0x1FF5FC47, /* 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)
+ */
+ 0x1FFD7C84, 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:
+ */
+
+int checkboard (void)
+{
+ puts ("Board: MATRIX Vision MVsensor\n");
+ return 0;
+}
+
+
+
+#ifdef DO_RAM_TEST
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Test SDRAM by writing its address to itself and reading several times
+*/
+#define READ_RUNS 4
+static void test_dram (unsigned long *start, unsigned long *end)
+{
+ unsigned long *addr;
+ unsigned long value;
+ int read_runs, errors, addr_errors;
+
+ printf ("\nChecking SDRAM from %p to %p\n", start, end);
+ udelay (1000000);
+ for (addr = start; addr < end; addr++)
+ *addr = (unsigned long) addr;
+
+ for (addr = start, addr_errors = 0; addr < end; addr++) {
+ for (read_runs = READ_RUNS, errors = 0; read_runs > 0; read_runs--) {
+ if ((value = *addr) != (unsigned long) addr)
+ errors++;
+ }
+ if (errors > 0) {
+ addr_errors++;
+ printf ("SDRAM errors (%d) at %p, last read = %ld\n",
+ errors, addr, value);
+ udelay (10000);
+ }
+ }
+ printf ("SDRAM check finished, total errors = %d\n", addr_errors);
+}
+#endif /* DO_RAM_TEST */
+
+
+/* ------------------------------------------------------------------------- */
+
+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_2BK_8K;
+
+ 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 defined (CFG_OR3_PRELIM) && defined (CFG_BR3_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;
+ }
+#endif
+
+ memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
+
+ udelay (200);
+
+ /* perform SDRAM initializsation sequence */
+
+ memctl->memc_mcr = 0x80004105; /* SDRAM bank 0 */
+ udelay (1);
+ memctl->memc_mcr = 0x80004230; /* SDRAM bank 0 - execute twice */
+ udelay (1);
+
+ if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
+ memctl->memc_mcr = 0x80006105; /* SDRAM bank 1 */
+ udelay (1);
+ memctl->memc_mcr = 0x80006230; /* SDRAM bank 1 - execute twice */
+ 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;
+ } else { /* back to 8 columns */
+ size_b0 = size8;
+ memctl->memc_mamr = CFG_MAMR_8COL;
+ udelay (500);
+ }
+
+ 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.]
+ */
+#if defined (SDRAM_BASE3_PRELIM)
+ size_b1 =
+ dram_size (memctl->memc_mamr, (ulong *) SDRAM_BASE3_PRELIM,
+ SDRAM_MAX_SIZE);
+#else
+ size_b1 = 0;
+#endif
+ } 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;
+ 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);
+
+#ifdef DO_RAM_TEST
+ if (size_b0 > 0)
+ test_dram ((unsigned long *) CFG_SDRAM_BASE,
+ (unsigned long *) (CFG_SDRAM_BASE + size_b0));
+#endif
+
+ 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;
+ long int cnt, val;
+
+
+ memctl->memc_mamr = mamr_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 */
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+u8 *dhcp_vendorex_prep (u8 * e)
+{
+ char *ptr;
+
+/* DHCP vendor-class-identifier = 60 */
+ if ((ptr = getenv ("dhcp_vendor-class-identifier"))) {
+ *e++ = 60;
+ *e++ = strlen (ptr);
+ while (*ptr)
+ *e++ = *ptr++;
+ }
+/* my DHCP_CLIENT_IDENTIFIER = 61 */
+ if ((ptr = getenv ("dhcp_client_id"))) {
+ *e++ = 61;
+ *e++ = strlen (ptr);
+ while (*ptr)
+ *e++ = *ptr++;
+ }
+
+ return e;
+}
+
+
+/* ------------------------------------------------------------------------- */
+u8 *dhcp_vendorex_proc (u8 * popt)
+{
+ return NULL;
+}