* Add start-up delay to make sure power has stabilized before

  attempting to switch on USB on SX1 board.

* Patch by Josef Wagner, 18 Mar 2004:
  - Add support for MicroSys XM250 board (PXA255)
  - Add support for MicroSys PM828 board (MPC8280)
  - Add support for 32 MB Flash on PM825/826
  - new SDRAM refresh rate for PM825/PM826
  - added support for MicroSys PM520 (MPC5200)
  - replaced Query by Identify command in CPU86/flash.c
    to support 28F160F3B

* Fix wrap around problem with udelay() on ARM920T

* Add support for Macronix flash on TRAB board

1 files changed, 193 insertions, 0 deletions

diff --git a/board/pm520/pm520.c b/board/pm520/pm520.c
new file mode 100644
index 0000000..bb0268f
--- /dev/null
+++ b/board/pm520/pm520.c
@@ -0,0 +1,193 @@
+/*
+ * (C) Copyright 2003-2004
+ * 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 <mpc5xxx.h>
+#include <pci.h>
+
+#ifndef CFG_RAMBOOT
+static long int dram_size(long int *base, long int maxsize)
+{
+	volatile long int *addr;
+	ulong cnt, val;
+	ulong save[32];			/* to make test non-destructive */
+	unsigned char i = 0;
+
+	for (cnt = (maxsize / sizeof (long)) >> 1; 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);
+}
+
+static void sdram_start (int hi_addr)
+{
+	long hi_addr_bit = hi_addr ? 0x01000000 : 0;
+
+	/* unlock mode register */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0000 | hi_addr_bit;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002 | hi_addr_bit;
+	/* set mode register */
+#if defined(CONFIG_MPC5200)
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x408d0000;
+#elif defined(CONFIG_MGT5100)
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
+#endif
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002 | hi_addr_bit;
+	/* auto refresh */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0004 | hi_addr_bit;
+	/* set mode register */
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
+	/* normal operation */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x504f0000 | hi_addr_bit;
+}
+#endif
+
+long int initdram (int board_type)
+{
+	ulong dramsize = 0;
+#ifndef CFG_RAMBOOT
+	ulong test1, test2;
+
+	/* configure SDRAM start/end */
+#if defined(CONFIG_MPC5200)
+	*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e;/* 2G at 0x0 */
+	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;/* disabled */
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2233a00;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
+
+#elif defined(CONFIG_MGT5100)
+	*(vu_long *)MPC5XXX_SDRAM_START = 0x00000000;
+	*(vu_long *)MPC5XXX_SDRAM_STOP = 0x0000ffff;/* 2G */
+	*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2222600;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
+
+	/* address select register */
+	*(vu_long *)MPC5XXX_SDRAM_XLBSEL = 0x03000000;
+#endif
+	sdram_start(0);
+	test1 = dram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
+	sdram_start(1);
+	test2 = dram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
+	if (test1 > test2) {
+		sdram_start(0);
+		dramsize = test1;
+	} else {
+		dramsize = test2;
+	}
+#if defined(CONFIG_MPC5200)
+	*(vu_long *)MPC5XXX_SDRAM_CS0CFG =
+		(0x13 + __builtin_ffs(dramsize >> 20) - 1);
+	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
+#elif defined(CONFIG_MGT5100)
+	*(vu_long *)MPC5XXX_SDRAM_STOP = ((dramsize - 1) >> 15);
+#endif
+
+#else
+#ifdef CONFIG_MGT5100
+	*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
+	dramsize = ((*(vu_long *)MPC5XXX_SDRAM_STOP + 1) << 15);
+#else
+	dramsize = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS0CFG - 0x13)) << 20);
+#endif
+#endif /* CFG_RAMBOOT */
+	/* return total ram size */
+	return dramsize;
+}
+
+int checkboard (void)
+{
+#if defined(CONFIG_MPC5200)
+	puts ("Board: MicroSys PM520 \n");
+#elif defined(CONFIG_MGT5100)
+	puts ("Board: MicroSys PM510 \n");
+#endif
+	return 0;
+}
+
+void flash_preinit(void)
+{
+	/*
+	 * Now, when we are in RAM, enable flash write
+	 * access for detection process.
+	 * Note that CS_BOOT cannot be cleared when
+	 * executing in flash.
+	 */
+#if defined(CONFIG_MGT5100)
+	*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25); /* disable CS_BOOT */
+	*(vu_long *)MPC5XXX_ADDECR |= (1 << 16); /* enable CS0 */
+#endif
+	*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
+}
+
+void flash_afterinit(ulong size)
+{
+	if (size == 0x800000) { /* adjust mapping */
+		*(vu_long *)MPC5XXX_BOOTCS_START = *(vu_long *)MPC5XXX_CS0_START =
+			START_REG(CFG_BOOTCS_START | size);
+		*(vu_long *)MPC5XXX_BOOTCS_STOP = *(vu_long *)MPC5XXX_CS0_STOP =
+			STOP_REG(CFG_BOOTCS_START | size, size);
+	}
+}
+
+#ifdef	CONFIG_PCI
+static struct pci_controller hose;
+
+extern void pci_mpc5xxx_init(struct pci_controller *);
+
+void pci_init_board(void)
+{
+	pci_mpc5xxx_init(&hose);
+}
+#endif