Add support for EDB93xx boards
Added support for the following EDB93xx boards:
EDB9301
EDB9302
EDB9302A
EDB9307
EDB9307A
EDB93012
EDB9315
EDB9315A
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
diff --git a/board/edb93xx/sdram_cfg.h b/board/edb93xx/sdram_cfg.h
new file mode 100644
index 0000000..757b63c
--- /dev/null
+++ b/board/edb93xx/sdram_cfg.h
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.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 <config.h>
+#include <asm/arch/ep93xx.h>
+
+#define SDRAM_BASE_ADDR PHYS_SDRAM_1
+
+#ifdef CONFIG_EDB93XX_SDCS0
+#define SDRAM_DEVCFG_REG devcfg0
+#elif defined(CONFIG_EDB93XX_SDCS3)
+#define SDRAM_DEVCFG_REG devcfg3
+#else
+#error "SDRAM bank configuration"
+#endif
+
+#if defined(CONFIG_EDB9301) || defined(CONFIG_EDB9302) || \
+ defined(CONFIG_EDB9302A)
+/*
+ * 1x Samsung K4S561632C-TC/L75 4M x 16bit x 4 banks SDRAM
+ *
+ * CLK cycle time min:
+ * @ CAS latency = 3: 7.5ns
+ * @ CAS latency = 2: 10ns
+ * We're running at 66MHz (15ns cycle time) external bus speed (HCLK),
+ * so it's safe to use CAS latency = 2
+ *
+ * RAS-to-CAS delay min:
+ * 20ns
+ * At 15ns cycle time, we use RAS-to-CAS delay = 2
+ *
+ * SROMLL = 1: Swap BA[1:0] with A[13:12], making the SDRAM appear
+ * as four blocks of 8MB size, instead of eight blocks of 4MB size:
+ *
+ * EDB9301/EDB9302:
+ *
+ * 0x00000000 - 0x007fffff
+ * 0x01000000 - 0x017fffff
+ * 0x04000000 - 0x047fffff
+ * 0x05000000 - 0x057fffff
+ *
+ *
+ * EDB9302a:
+ *
+ * 0xc0000000 - 0xc07fffff
+ * 0xc1000000 - 0xc17fffff
+ * 0xc4000000 - 0xc47fffff
+ * 0xc5000000 - 0xc57fffff
+ *
+ * BANKCOUNT = 1: This is a device with four banks
+ */
+
+#define SDRAM_DEVCFG_VAL (SDRAM_DEVCFG_BANKCOUNT | \
+ SDRAM_DEVCFG_SROMLL | \
+ SDRAM_DEVCFG_CASLAT_2 | \
+ SDRAM_DEVCFG_RASTOCAS_2 | \
+ SDRAM_DEVCFG_EXTBUSWIDTH)
+
+/*
+ * 16 bit ext. bus
+ *
+ * A[22:09] is output as SYA[13:0]
+ * CAS latency: 2
+ * Burst type: sequential
+ * Burst length: 8 (required for 16 bit ext. bus)
+ * SYA[13:0] = 0x0023
+ */
+#define SDRAM_MODE_REG_VAL 0x4600
+
+#define SDRAM_BANK_SEL_0 0x00000000 /* A[22:21] = b00 */
+#define SDRAM_BANK_SEL_1 0x00200000 /* A[22:21] = b01 */
+#define SDRAM_BANK_SEL_2 0x00400000 /* A[22:21] = b10 */
+#define SDRAM_BANK_SEL_3 0x00600000 /* A[22:21] = b11 */
+
+#elif defined(CONFIG_EDB9307) || defined(CONFIG_EDB9307A) || \
+ defined CONFIG_EDB9312 || defined(CONFIG_EDB9315) || \
+ defined(CONFIG_EDB9315A)
+/*
+ * 2x Samsung K4S561632C-TC/L75 4M x 16bit x 4 banks SDRAM
+ *
+ * CLK cycle time min:
+ * @ CAS latency = 3: 7.5ns
+ * @ CAS latency = 2: 10ns
+ * We're running at 100MHz (10ns cycle time) external bus speed (HCLK),
+ * so it's safe to use CAS latency = 2
+ *
+ * RAS-to-CAS delay min:
+ * 20ns
+ * At 10ns cycle time, we use RAS-to-CAS delay = 2
+ *
+ * EDB9307, EDB9312, EDB9315:
+ *
+ * 0x00000000 - 0x01ffffff
+ * 0x04000000 - 0x05ffffff
+ *
+ *
+ * EDB9307a, EDB9315a:
+ *
+ * 0xc0000000 - 0xc1ffffff
+ * 0xc4000000 - 0xc5ffffff
+ */
+
+#define SDRAM_DEVCFG_VAL (SDRAM_DEVCFG_BANKCOUNT | \
+ SDRAM_DEVCFG_SROMLL | \
+ SDRAM_DEVCFG_CASLAT_2 | \
+ SDRAM_DEVCFG_RASTOCAS_2)
+
+/*
+ * 32 bit ext. bus
+ *
+ * A[23:10] is output as SYA[13:0]
+ * CAS latency: 2
+ * Burst type: sequential
+ * Burst length: 4
+ * SYA[13:0] = 0x0022
+ */
+#define SDRAM_MODE_REG_VAL 0x8800
+
+#define SDRAM_BANK_SEL_0 0x00000000 /* A[23:22] = b00 */
+#define SDRAM_BANK_SEL_1 0x00400000 /* A[23:22] = b01 */
+#define SDRAM_BANK_SEL_2 0x00800000 /* A[23:22] = b10 */
+#define SDRAM_BANK_SEL_3 0x00c00000 /* A[23:22] = b11 */
+#endif