[U-Boot] [PATCH v8 3/3] MIPS: Jz4740: Add qi_lb60 board support
Shinya Kuribayashi
skuribay at pobox.com
Wed Oct 12 16:27:06 CEST 2011
From: Xiangfu Liu <xiangfu at openmobilefree.net>
Date: Wed, 12 Oct 2011 12:24:06 +0800
Add support for the qi_lb60 (a.k.a QI Ben NanoNote) clamshell device
from Qi hardware:
http://en.qi-hardware.com/wiki/Ben_NanoNote
http://en.qi-hardware.com/wiki/Main_Page
http://en.wikipedia.org/wiki/Qi_hardware
This Jz4740-based clamshell device does not use NOR flash to boot.
The initial bring-up assumes that U-Boot is directly loaded into SDRAM
using USB boot tool, and starts from 0x80100000.
About USB boot tool
-------------------
Jz4740 is one of the XBurst processors with USB boot functionality
supported. The CPU can boot from a small ROM in the LSI, initialize
CPU and USB module, then wait for USB commands from the USB host.
We can send 8 KB binary data to the CPU cache using USB boot tool.
USB boot tool is available to the public at Ingenic website. Also
there is an alternative Debian package named xburst-tools.
Signed-off-by: Xiangfu Liu <xiangfu at openmobilefree.net>
Acked-by: Daniel <zpxu at ingenic.cn>
Signed-off-by: Shinya Kuribayashi <skuribay at pobox.com>
---
Changes since v7:
* Fix checkpatch errors/warnings
Changes since v6:
* <nanonote.h> config files is folded into <qi_lb60.h>
* Following configs are deleted:
CONFIG_SYS_64BIT_VSPRINTF
CONFIG_NANDBOOT_CFG
CONFIG_QI_LB60
MAINTAINERS | 4 +
MAKEALL | 4 +-
board/qi/qi_lb60/Makefile | 45 +++++++++
board/qi/qi_lb60/config.mk | 31 +++++++
board/qi/qi_lb60/qi_lb60.c | 104 +++++++++++++++++++++
board/qi/qi_lb60/u-boot.lds | 61 +++++++++++++
boards.cfg | 1 +
include/configs/qi_lb60.h | 211 +++++++++++++++++++++++++++++++++++++++++++
8 files changed, 460 insertions(+), 1 deletions(-)
create mode 100644 board/qi/qi_lb60/Makefile
create mode 100644 board/qi/qi_lb60/config.mk
create mode 100644 board/qi/qi_lb60/qi_lb60.c
create mode 100644 board/qi/qi_lb60/u-boot.lds
create mode 100644 include/configs/qi_lb60.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 3ab38fa..bb95e6d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -928,6 +928,10 @@ Stefan Roese <sr at denx.de>
vct_xxx MIPS32 4Kc
+Xiangfu Liu <xiangfu at openmobilefree.net>
+
+ qi_lb60 MIPS32 (XBurst Jz4740 SoC)
+
#########################################################################
# Nios-II Systems: #
# #
diff --git a/MAKEALL b/MAKEALL
index 52bc355..f582f8b 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -400,7 +400,9 @@ LIST_mips=" \
## MIPS Systems (little endian)
#########################################################################
-LIST_mips4kc_el=""
+LIST_mips4kc_el=" \
+ qi_lb60 \
+"
LIST_mips5kc_el=""
diff --git a/board/qi/qi_lb60/Makefile b/board/qi/qi_lb60/Makefile
new file mode 100644
index 0000000..2f5b4be
--- /dev/null
+++ b/board/qi/qi_lb60/Makefile
@@ -0,0 +1,45 @@
+#
+# (C) Copyright 2006
+# Ingenic Semiconductor, <jlwei at ingenic.cn>
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB = $(obj)lib$(BOARD).o
+
+COBJS := $(BOARD).o
+
+SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
+
+$(LIB): $(obj).depend $(OBJS) $(SOBJS)
+ $(call cmd_link_o_target, $(OBJS))
+
+clean:
+ rm -f $(SOBJS) $(OBJS)
+
+distclean: clean
+ rm -f $(LIB) core *.bak $(obj).depend
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/qi/qi_lb60/config.mk b/board/qi/qi_lb60/config.mk
new file mode 100644
index 0000000..858e6a2
--- /dev/null
+++ b/board/qi/qi_lb60/config.mk
@@ -0,0 +1,31 @@
+#
+# (C) Copyright 2006 Qi Hardware, Inc.
+# Author: Xiangfu Liu <xiangfu.z at gmail.com>
+#
+# 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
+#
+
+#
+# Qi Hardware, Inc. Ben NanoNote (QI_LB60)
+#
+
+ifndef TEXT_BASE
+# ROM version
+# TEXT_BASE = 0x88000000
+
+# RAM version
+TEXT_BASE = 0x80100000
+endif
diff --git a/board/qi/qi_lb60/qi_lb60.c b/board/qi/qi_lb60/qi_lb60.c
new file mode 100644
index 0000000..3583d01
--- /dev/null
+++ b/board/qi/qi_lb60/qi_lb60.c
@@ -0,0 +1,104 @@
+/*
+ * Authors: Xiangfu Liu <xiangfu at sharism.cc>
+ *
+ * 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
+ * 3 of the License, or (at your option) any later version.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/jz4740.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void gpio_init(void)
+{
+ unsigned int i;
+
+ /* Initialize NAND Flash Pins */
+ __gpio_as_nand();
+
+ /* Initialize SDRAM pins */
+ __gpio_as_sdram_16bit_4720();
+
+ /* Initialize LCD pins */
+ __gpio_as_lcd_18bit();
+
+ /* Initialize MSC pins */
+ __gpio_as_msc();
+
+ /* Initialize Other pins */
+ for (i = 0; i < 7; i++) {
+ __gpio_as_input(GPIO_KEYIN_BASE + i);
+ __gpio_enable_pull(GPIO_KEYIN_BASE + i);
+ }
+
+ for (i = 0; i < 8; i++) {
+ __gpio_as_output(GPIO_KEYOUT_BASE + i);
+ __gpio_clear_pin(GPIO_KEYOUT_BASE + i);
+ }
+
+ __gpio_as_input(GPIO_KEYIN_8);
+ __gpio_enable_pull(GPIO_KEYIN_8);
+
+ /* enable the TP4, TP5 as UART0 */
+ __gpio_jtag_to_uart0();
+
+ __gpio_as_output(GPIO_AUDIO_POP);
+ __gpio_set_pin(GPIO_AUDIO_POP);
+
+ __gpio_as_output(GPIO_LCD_CS);
+ __gpio_clear_pin(GPIO_LCD_CS);
+
+ __gpio_as_output(GPIO_AMP_EN);
+ __gpio_clear_pin(GPIO_AMP_EN);
+
+ __gpio_as_output(GPIO_SDPW_EN);
+ __gpio_disable_pull(GPIO_SDPW_EN);
+ __gpio_clear_pin(GPIO_SDPW_EN);
+
+ __gpio_as_input(GPIO_SD_DETECT);
+ __gpio_disable_pull(GPIO_SD_DETECT);
+
+ __gpio_as_input(GPIO_USB_DETECT);
+ __gpio_enable_pull(GPIO_USB_DETECT);
+}
+
+static void cpm_init(void)
+{
+ struct jz4740_cpm *cpm = (struct jz4740_cpm *)JZ4740_CPM_BASE;
+ uint32_t reg = readw(&cpm->clkgr);
+
+ reg |= CPM_CLKGR_IPU |
+ CPM_CLKGR_CIM |
+ CPM_CLKGR_I2C |
+ CPM_CLKGR_SSI |
+ CPM_CLKGR_UART1 |
+ CPM_CLKGR_SADC |
+ CPM_CLKGR_UHC |
+ CPM_CLKGR_UDC |
+ CPM_CLKGR_AIC1;
+
+ writew(reg, &cpm->clkgr);
+}
+
+int board_early_init_f(void)
+{
+ gpio_init();
+ cpm_init();
+ calc_clocks(); /* calc the clocks */
+ rtc_init(); /* init rtc on any reset */
+
+ return 0;
+}
+
+/* U-Boot common routines */
+int checkboard(void)
+{
+ printf("Board: Qi LB60 (Ingenic XBurst Jz4740 SoC, Speed %ld MHz)\n",
+ gd->cpu_clk / 1000000);
+
+ return 0;
+}
diff --git a/board/qi/qi_lb60/u-boot.lds b/board/qi/qi_lb60/u-boot.lds
new file mode 100644
index 0000000..7317652
--- /dev/null
+++ b/board/qi/qi_lb60/u-boot.lds
@@ -0,0 +1,61 @@
+/*
+ * (C) Copyright 2006
+ * Ingenic Semiconductor, <jlwei at ingenic.cn>
+ *
+ * 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
+ */
+
+OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradlittlemips", "elf32-tradlittlemips")
+
+OUTPUT_ARCH(mips)
+ENTRY(_start)
+SECTIONS
+{
+ . = 0x00000000;
+
+ . = ALIGN(4);
+ .text :
+ {
+ *(.text*)
+ }
+
+ . = ALIGN(4);
+ .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+ . = ALIGN(4);
+ .data : { *(.data*) }
+
+ . = .;
+ _gp = ALIGN(16) + 0x7ff0;
+
+ __got_start = .;
+ .got : { *(.got) }
+ __got_end = .;
+
+ .sdata : { *(.sdata*) }
+
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
+
+ uboot_end_data = .;
+ num_got_entries = (__got_end - __got_start) >> 2;
+
+ . = ALIGN(4);
+ .sbss : { *(.sbss*) }
+ .bss : { *(.bss*) . = ALIGN(4); }
+ uboot_end = .;
+}
diff --git a/boards.cfg b/boards.cfg
index 65482ac..d3d610d 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -302,6 +302,7 @@ vct_platinumavc mips mips32 vct microna
vct_platinumavc_small mips mips32 vct micronas - vct:VCT_PLATINUMAVC,VCT_SMALL_IMAGE
vct_platinumavc_onenand mips mips32 vct micronas - vct:VCT_PLATINUMAVC,VCT_ONENAND
vct_platinumavc_onenand_small mips mips32 vct micronas - vct:VCT_PLATINUMAVC,VCT_ONENAND,VCT_SMALL_IMAGE
+qi_lb60 mips xburst qi_lb60 qi
nios2-generic nios2 nios2 nios2-generic altera
PCI5441 nios2 nios2 pci5441 psyent
PK1C20 nios2 nios2 pk1c20 psyent
diff --git a/include/configs/qi_lb60.h b/include/configs/qi_lb60.h
new file mode 100644
index 0000000..f989595
--- /dev/null
+++ b/include/configs/qi_lb60.h
@@ -0,0 +1,211 @@
+/*
+ * Authors: Xiangfu Liu <xiangfu.z at gmail.com>
+ *
+ * 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
+ * 3 of the License, or (at your option) any later version.
+ */
+
+#ifndef __CONFIG_QI_LB60_H
+#define __CONFIG_QI_LB60_H
+
+#define CONFIG_MIPS32 /* MIPS32 CPU core */
+#define CONFIG_JZSOC /* Jz SoC */
+#define CONFIG_JZ4740 /* Jz4740 SoC */
+#define CONFIG_NAND_JZ4740
+
+#define CONFIG_SYS_CPU_SPEED 336000000 /* CPU clock: 336 MHz */
+#define CONFIG_SYS_EXTAL 12000000 /* EXTAL freq: 12 MHz */
+#define CONFIG_SYS_HZ (CONFIG_SYS_EXTAL / 256) /* incrementer freq */
+#define CONFIG_SYS_MIPS_TIMER_FREQ CONFIG_SYS_CPU_SPEED
+
+#define CONFIG_SYS_UART_BASE JZ4740_UART0_BASE /* Base of the UART channel */
+#define CONFIG_BAUDRATE 57600
+#define CONFIG_SYS_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
+
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_SYS_NO_FLASH
+#define CONFIG_SYS_FLASH_BASE 0 /* init flash_base as 0 */
+#define CONFIG_ENV_OVERWRITE
+
+#define CONFIG_BOOTP_MASK (CONFIG_BOOTP_DEFAUL)
+#define CONFIG_BOOTDELAY 0
+#define CONFIG_BOOTARGS "mem=32M console=tty0 console=ttyS0,57600n8 ubi.mtd=2 rootfstype=ubifs root=ubi0:rootfs rw rootwait"
+#define CONFIG_BOOTCOMMAND "nand read 0x80600000 0x400000 0x200000;bootm"
+
+/*
+ * Command line configuration.
+ */
+#define CONFIG_CMD_BOOTD /* bootd */
+#define CONFIG_CMD_CONSOLE /* coninfo */
+#define CONFIG_CMD_ECHO /* echo arguments */
+
+#define CONFIG_CMD_LOADB /* loadb */
+#define CONFIG_CMD_LOADS /* loads */
+#define CONFIG_CMD_MEMORY /* md mm nm mw cp cmp crc base loop mtest */
+#define CONFIG_CMD_MISC /* Misc functions like sleep etc*/
+#define CONFIG_CMD_RUN /* run command in env variable */
+#define CONFIG_CMD_SAVEENV /* saveenv */
+#define CONFIG_CMD_SETGETDCR /* DCR support on 4xx */
+#define CONFIG_CMD_SOURCE /* "source" command support */
+#define CONFIG_CMD_NAND
+
+/*
+ * Serial download configuration
+ */
+#define CONFIG_LOADS_ECHO 1 /* echo on for serial download */
+
+/*
+ * Miscellaneous configurable options
+ */
+#define CONFIG_SYS_MAXARGS 16
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_SYS_PROMPT "NanoNote# "
+#define CONFIG_SYS_CBSIZE 256 /* Console I/O Buffer Size */
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
+
+#define CONFIG_SYS_MALLOC_LEN (4 * 1024 * 1024)
+#define CONFIG_SYS_BOOTPARAMS_LEN (128 * 1024)
+
+#define CONFIG_SYS_SDRAM_BASE 0x80000000 /* Cached addr */
+#define CONFIG_SYS_INIT_SP_OFFSET 0x400000
+#define CONFIG_SYS_LOAD_ADDR 0x80600000
+#define CONFIG_SYS_MEMTEST_START 0x80100000
+#define CONFIG_SYS_MEMTEST_END 0x80800000
+
+/*
+ * Environment
+ */
+#define CONFIG_ENV_IS_IN_NAND /* use NAND for environment vars */
+
+#define CONFIG_SYS_NAND_5_ADDR_CYCLE
+/*
+ * if board nand flash is 1GB, set to 1
+ * if board nand flash is 2GB, set to 2
+ * for change the PAGE_SIZE and BLOCK_SIZE
+ * will delete when there is no 1GB flash
+ */
+#define NANONOTE_NAND_SIZE 2
+
+#define CONFIG_SYS_NAND_PAGE_SIZE (2048 * NANONOTE_NAND_SIZE)
+#define CONFIG_SYS_NAND_BLOCK_SIZE (256 * NANONOTE_NAND_SIZE << 10)
+/* nand bad block was marked at this page in a block, start from 0 */
+#define CONFIG_SYS_NAND_BADBLOCK_PAGE 127
+#define CONFIG_SYS_NAND_PAGE_COUNT 128
+#define CONFIG_SYS_NAND_BAD_BLOCK_POS 0
+/* ECC offset position in oob area, default value is 6 if it isn't defined */
+#define CONFIG_SYS_NAND_ECC_POS (6 * NANONOTE_NAND_SIZE)
+#define CONFIG_SYS_NAND_ECCSIZE 512
+#define CONFIG_SYS_NAND_ECCBYTES 9
+#define CONFIG_SYS_NAND_ECCSTEPS \
+ (CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_SYS_NAND_ECCSIZE)
+#define CONFIG_SYS_NAND_ECCTOTAL \
+ (CONFIG_SYS_NAND_ECCBYTES * CONFIG_SYS_NAND_ECCSTEPS)
+#define CONFIG_SYS_NAND_ECCPOS \
+ {12, 13, 14, 15, 16, 17, 18, 19,\
+ 20, 21, 22, 23, 24, 25, 26, 27, \
+ 28, 29, 30, 31, 32, 33, 34, 35, \
+ 36, 37, 38, 39, 40, 41, 42, 43, \
+ 44, 45, 46, 47, 48, 49, 50, 51, \
+ 52, 53, 54, 55, 56, 57, 58, 59, \
+ 60, 61, 62, 63, 64, 65, 66, 67, \
+ 68, 69, 70, 71, 72, 73, 74, 75, \
+ 76, 77, 78, 79, 80, 81, 82, 83}
+
+#define CONFIG_SYS_NAND_OOBSIZE 128
+#define CONFIG_SYS_NAND_BASE 0xB8000000
+#define CONFIG_SYS_ONENAND_BASE CONFIG_SYS_NAND_BASE
+#define NAND_MAX_CHIPS 1
+#define CONFIG_SYS_MAX_NAND_DEVICE 1
+#define CONFIG_SYS_NAND_SELECT_DEVICE 1 /* nand driver supports mutipl.*/
+#define CONFIG_NAND_SPL_TEXT_BASE 0x80000000
+
+/*
+ * IPL (Initial Program Loader, integrated inside CPU)
+ * Will load first 8k from NAND (SPL) into cache and execute it from there.
+ *
+ * SPL (Secondary Program Loader)
+ * Will load special U-Boot version (NUB) from NAND and execute it. This SPL
+ * has to fit into 8kByte. It sets up the CPU and configures the SDRAM
+ * controller and the NAND controller so that the special U-Boot image can be
+ * loaded from NAND to SDRAM.
+ *
+ * NUB (NAND U-Boot)
+ * This NAND U-Boot (NUB) is a special U-Boot version which can be started
+ * from RAM. Therefore it mustn't (re-)configure the SDRAM controller.
+ *
+ */
+#define CONFIG_SYS_NAND_U_BOOT_DST 0x80100000 /* Load NUB to this addr */
+#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_NAND_U_BOOT_DST
+/* Start NUB from this addr*/
+
+/*
+ * Define the partitioning of the NAND chip (only RAM U-Boot is needed here)
+ */
+#define CONFIG_SYS_NAND_U_BOOT_OFFS (256 << 10) /* Offset to RAM U-Boot image */
+#define CONFIG_SYS_NAND_U_BOOT_SIZE (512 << 10) /* Size of RAM U-Boot image */
+
+#define CONFIG_ENV_SIZE (4 << 10)
+#define CONFIG_ENV_OFFSET \
+ (CONFIG_SYS_NAND_BLOCK_SIZE + CONFIG_SYS_NAND_U_BOOT_SIZE)
+#define CONFIG_ENV_OFFSET_REDUND \
+ (CONFIG_ENV_OFFSET + CONFIG_SYS_NAND_BLOCK_SIZE)
+
+#define CONFIG_SYS_TEXT_BASE 0x80100000
+#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_TEXT_BASE
+
+/*
+ * SDRAM Info.
+ */
+#define CONFIG_NR_DRAM_BANKS 1
+
+/*
+ * Cache Configuration
+ */
+#define CONFIG_SYS_DCACHE_SIZE 16384
+#define CONFIG_SYS_ICACHE_SIZE 16384
+#define CONFIG_SYS_CACHELINE_SIZE 32
+
+/*
+ * GPIO definition
+ */
+#define GPIO_LCD_CS (2 * 32 + 21)
+#define GPIO_AMP_EN (3 * 32 + 4)
+
+#define GPIO_SDPW_EN (3 * 32 + 2)
+#define GPIO_SD_DETECT (3 * 32 + 0)
+
+#define GPIO_BUZZ_PWM (3 * 32 + 27)
+#define GPIO_USB_DETECT (3 * 32 + 28)
+
+#define GPIO_AUDIO_POP (1 * 32 + 29)
+#define GPIO_COB_TEST (1 * 32 + 30)
+
+#define GPIO_KEYOUT_BASE (2 * 32 + 10)
+#define GPIO_KEYIN_BASE (3 * 32 + 18)
+#define GPIO_KEYIN_8 (3 * 32 + 26)
+
+#define GPIO_SD_CD_N GPIO_SD_DETECT /* SD Card insert detect */
+#define GPIO_SD_VCC_EN_N GPIO_SDPW_EN /* SD Card Power Enable */
+
+#define SPEN GPIO_LCD_CS /* LCDCS :Serial command enable */
+#define SPDA (2 * 32 + 22) /* LCDSCL:Serial command clock input */
+#define SPCK (2 * 32 + 23) /* LCDSDA:Serial command data input */
+
+/* SDRAM paramters */
+#define SDRAM_BW16 1 /* Data bus width: 0-32bit, 1-16bit */
+#define SDRAM_BANK4 1 /* Banks each chip: 0-2bank, 1-4bank */
+#define SDRAM_ROW 13 /* Row address: 11 to 13 */
+#define SDRAM_COL 9 /* Column address: 8 to 12 */
+#define SDRAM_CASL 2 /* CAS latency: 2 or 3 */
+
+/* SDRAM Timings, unit: ns */
+#define SDRAM_TRAS 45 /* RAS# Active Time */
+#define SDRAM_RCD 20 /* RAS# to CAS# Delay */
+#define SDRAM_TPC 20 /* RAS# Precharge Time */
+#define SDRAM_TRWL 7 /* Write Latency Time */
+#define SDRAM_TREF 15625 /* Refresh period: 8192 cycles/64ms */
+
+#endif
--
1.7.5.4
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