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authorWolfgang Denk <wd@pollux.denx.de>2006-03-12 23:17:31 +0100
committerWolfgang Denk <wd@pollux.denx.de>2006-03-12 23:17:31 +0100
commit84c960ce6dbea55565a7891ff4fe87e08803e9cf (patch)
tree3a2fcbdba01089a6a8b5f5af10e7c9b5727b2855 /board/ep88x/ep88x.c
parent763b5f34c36ba461428a72702f5aa21cb1d92e0e (diff)
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Add support for EmbeddedPlanet EP88x boards
Patch by Yuli Barcohen, 13 Jul 2005
Diffstat (limited to 'board/ep88x/ep88x.c')
-rw-r--r--board/ep88x/ep88x.c133
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;
+}