Add support for EmbeddedPlanet EP88x boards

Patch by Yuli Barcohen, 13 Jul 2005

1 files changed, 133 insertions, 0 deletions

diff --git a/board/ep88x/ep88x.c b/board/ep88x/ep88x.c
new file mode 100644
index 0000000..5f57f36
--- /dev/null
+++ b/board/ep88x/ep88x.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2005 Arabella Software Ltd.
+ * Yuli Barcohen <yuli@arabellasw.com>
+ *
+ * Support for Embedded Planet EP88x boards.
+ * Tested on EP88xC with MPC885 CPU, 64MB SDRAM and 16MB flash.
+ *
+ * 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>
+
+/*
+ * SDRAM uses two Micron chips.
+ * Minimal CPU frequency is 40MHz.
+ */
+static uint sdram_table[] = {
+	/* Single read	(offset 0x00 in UPM RAM) */
+	0xEFCBCC04, 0x0F37C804, 0x0EEEC004, 0x01B98404,
+	0x1FF74C00, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
+
+	/* Burst read	(offset 0x08 in UPM RAM) */
+	0xEFCBCC04, 0x0F37C804, 0x0EEEC004, 0x00BDC404,
+	0x00FFCC00, 0x00FFCC00, 0x01FB8C00, 0x1FF74C00,
+	0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
+	0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
+
+	/* Single write (offset 0x18 in UPM RAM) */
+	0xEFCBCC04, 0x0F37C804, 0x0EEE8002, 0x01B90404,
+	0x1FF74C05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
+
+	/* Burst write	(offset 0x20 in UPM RAM) */
+	0xEFCBCC04, 0x0F37C804, 0x0EEE8000, 0x00BD4400,
+	0x00FFCC00, 0x00FFCC02, 0x01FB8C04, 0x1FF74C05,
+	0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
+	0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
+
+	/* Refresh	(offset 0x30 in UPM RAM) */
+	0xEFFACC04, 0x0FF5CC04, 0x0FFFCC04, 0x1FFFCC04,
+	0xFFFFCC05, 0xFFFFCC05, 0xEFFB8C34, 0x0FF74C34,
+	0x0FFACCB4, 0x0FF5CC34, 0x0FFFC034, 0x0FFFC0B4,
+
+	/* Exception	(offset 0x3C in UPM RAM) */
+	0x0FEA8034, 0x1FB54034,	0xFFFFCC34, 0xFFFFCC05
+};
+
+int board_early_init_f (void)
+{
+	vu_char *bcsr = (vu_char *)CFG_BCSR;
+
+	bcsr[0] |= 0x0C; /* Turn the LEDs off */
+	bcsr[2] |= 0x08; /* Enable flash WE# line - necessary for
+			    flash detection by CFI driver
+			 */
+
+#if defined(CONFIG_8xx_CONS_SMC1)
+	bcsr[6] |= 0x10; /* Enables RS-232 transceiver */
+#endif
+#if defined(CONFIG_8xx_CONS_SCC2)
+	bcsr[7] |= 0x10; /* Enables RS-232 transceiver */
+#endif
+#ifdef CONFIG_ETHER_ON_FEC1
+	bcsr[8] |= 0xC0; /* Enable Ethernet 1 PHY */
+#endif
+#ifdef CONFIG_ETHER_ON_FEC2
+	bcsr[8] |= 0x30; /* Enable Ethernet 2 PHY */
+#endif
+
+	return 0;
+}
+
+long int initdram (int board_type)
+{
+	long int msize;
+	volatile immap_t     *immap  = (volatile immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+	upmconfig(UPMA, sdram_table, sizeof(sdram_table) / sizeof(uint));
+
+	/* Configure SDRAM refresh */
+	memctl->memc_mptpr = MPTPR_PTP_DIV2; /* BRGCLK/2 */
+
+	memctl->memc_mamr = (65 << 24) | CFG_MAMR; /* No refresh */
+	udelay(100);
+
+	/* Run MRS pattern from location 0x36 */
+	memctl->memc_mar = 0x88;
+	memctl->memc_mcr = 0x80002236;
+	udelay(100);
+
+	memctl->memc_mamr |=  MAMR_PTAE; /* Enable refresh */
+	memctl->memc_or1   = ~(CFG_SDRAM_MAX_SIZE - 1) | OR_CSNT_SAM;
+	memctl->memc_br1   =  CFG_SDRAM_BASE | BR_PS_32 | BR_MS_UPMA | BR_V;
+
+	msize = get_ram_size(CFG_SDRAM_BASE, CFG_SDRAM_MAX_SIZE);
+	memctl->memc_or1  |= ~(msize - 1);
+
+	return msize;
+}
+
+int checkboard( void )
+{
+	vu_char *bcsr = (vu_char *)CFG_BCSR;
+
+	puts("Board: ");
+	switch (bcsr[15]) {
+	case 0xE7:
+		puts("EP88xC 1.0");
+		break;
+	default:
+		printf("unknown ID=%02X", bcsr[15]);
+	}
+	printf("  CPLD revision %d\n", bcsr[14]);
+
+	return 0;
+}