dm355 evm support

Initial U-Boot support for the DaVinci DM355 EVM.  This is a board
from Spectrum Digital.  Board docs include schematic and firmware
for its microcontroller:

  http://c6000.spectrumdigital.com/evmdm355/revd/

Most of the DM355 chip is fully documented by TI, the most notable
exception being the MPEG/JPEG coprocessor (programmable using codecs
available at no cost from TI), which is omitted from its DM335 sibling:

  http://focus.ti.com/docs/prod/folders/print/tms320dm355.html

This version can boot from the on-board DM9000 Ethernet chip, after
being loaded (from NAND, MMC/SD, or UART).  In the near future, NAND
and USB support could be added ... NAND support is being held back
until the support for the 4-bit ECC hardware is ready.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

MAKEALL

@@ -528,6 +528,7 @@ LIST_ARM9="			\
 	davinci_schmoogie	\
 	davinci_sffsdr		\
 	davinci_sonata		\
+	davinci_dm355evm	\
 "
 
 #########################################################################

Makefile

@@ -2801,6 +2801,9 @@ davinci_sffsdr_config :	unconfig
 davinci_sonata_config :	unconfig
 	@$(MKCONFIG) $(@:_config=) arm arm926ejs sonata davinci davinci
 
+davinci_dm355evm_config :	unconfig
+	@$(MKCONFIG) $(@:_config=) arm arm926ejs dm355evm davinci davinci
+
 lpd7a400_config \
 lpd7a404_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) arm lh7a40x lpd7a40x

board/davinci/dm355evm/Makefile

@@ -0,0 +1,52 @@
+#
+# (C) Copyright 2000, 2001, 2002
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(BOARD).a
+
+COBJS	:= $(BOARD).o
+SOBJS	:=
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak $(obj).depend
+
+#########################################################################
+# This is for $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################

board/davinci/dm355evm/config.mk

@@ -0,0 +1,11 @@
+#
+# Spectrum Digital DM355 EVM board
+#	dm355evm board has 1 bank of 128 MB DDR RAM
+#	Physical Address: 8000'0000 to 8800'0000
+#
+# Linux Kernel is expected to be at 8000'8000, entry 8000'8000
+# (mem base + reserved)
+#
+
+#Provide at least 16MB spacing between us and the Linux Kernel image
+TEXT_BASE = 0x81080000

board/davinci/dm355evm/dm355evm.c

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2009 David Brownell
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <nand.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/emif_defs.h>
+#include <asm/arch/nand_defs.h>
+#include "../common/misc.h"
+
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * With the DM355 EVM, u-boot is *always* a third stage loader,
+ * unless a JTAG debugger handles the first two stages:
+ *
+ *   - 1st stage is ROM Boot Loader (RBL), which searches for a
+ *     second stage loader in one of three places based on SW7:
+ *     NAND (with MMC/SD fallback), MMC/SD, or UART.
+ *
+ *   - 2nd stage is User Boot Loader (UBL), using at most 30KB
+ *     of on-chip SRAM, responsible for lowlevel init, and for
+ *     loading the third stage loader into DRAM.
+ *
+ *   - 3rd stage, that's us!
+ */
+
+int board_init(void)
+{
+	gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DM355_EVM;
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	/* We expect the UBL to have handled "lowlevel init", which
+	 * involves setting up at least:
+	 *  - clocks
+	 *      + PLL1 (for ARM and peripherals) and PLL2 (for DDR)
+	 *      + clock divisors for those PLLs
+	 *      + LPSC_DDR module enabled
+	 *      + LPSC_TIMER0 module (still) enabled
+	 *  - EMIF
+	 *      + DDR init and timings
+	 *      + AEMIF timings (for NAND and DM9000)
+	 *  - pinmux
+	 *
+	 * Some of that is repeated here, mostly as a precaution.
+	 */
+
+	/* AEMIF:  Some "address" lines are available as GPIOs.  A3..A13
+	 * could be too if we used A12 as a GPIO during NAND chipselect
+	 * (and Linux did too), letting us control the LED on A7/GPIO61.
+	 */
+	REG(PINMUX2) = 0x0c08;
+
+	/* UART0 may still be in SyncReset if we didn't boot from UART */
+	davinci_enable_uart0();
+
+	/* EDMA may be in SyncReset too; turn it on, Linux won't (yet) */
+	lpsc_on(DAVINCI_LPSC_TPCC);
+	lpsc_on(DAVINCI_LPSC_TPTC0);
+	lpsc_on(DAVINCI_LPSC_TPTC1);
+
+	return 0;
+}
+
+#ifdef CONFIG_NAND_DAVINCI
+
+static void nand_dm355evm_select_chip(struct mtd_info *mtd, int chip)
+{
+	struct nand_chip	*this = mtd->priv;
+	u32			wbase = (u32) this->IO_ADDR_W;
+	u32			rbase = (u32) this->IO_ADDR_R;
+
+	if (chip == 1) {
+		__set_bit(14, &wbase);
+		__set_bit(14, &rbase);
+	} else {
+		__clear_bit(14, &wbase);
+		__clear_bit(14, &rbase);
+	}
+	this->IO_ADDR_W = (void *)wbase;
+	this->IO_ADDR_R = (void *)rbase;
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+	davinci_nand_init(nand);
+	nand->select_chip = nand_dm355evm_select_chip;
+	return 0;
+}
+
+#endif

include/configs/davinci_dm355evm.h

@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2009 David Brownell
+ *
+ * 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
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+#include <asm/sizes.h>
+
+/* Spectrum Digital TMS320DM355 EVM board */
+#define DAVINCI_DM355EVM
+
+#define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is a 3rd stage loader */
+#define CONFIG_SKIP_RELOCATE_UBOOT
+#define CONFIG_SYS_NO_FLASH		/* that is, no *NOR* flash */
+#define CONFIG_SYS_CONSOLE_INFO_QUIET
+#define CONFIG_DISPLAY_CPUINFO
+
+/* SoC Configuration */
+#define CONFIG_ARM926EJS				/* arm926ejs CPU */
+#define CONFIG_SYS_TIMERBASE		0x01c21400	/* use timer 0 */
+#define CONFIG_SYS_HZ_CLOCK		24000000	/* timer0 freq */
+#define CONFIG_SYS_HZ			1000
+#define CONFIG_SOC_DM355
+
+/* Memory Info */
+#define CONFIG_NR_DRAM_BANKS		1
+#define PHYS_SDRAM_1			0x80000000
+#define PHYS_SDRAM_1_SIZE		SZ_128M
+
+/* Serial Driver info: UART0 for console  */
+#define CONFIG_SYS_NS16550
+#define CONFIG_SYS_NS16550_SERIAL
+#define CONFIG_SYS_NS16550_REG_SIZE	-4
+#define CONFIG_SYS_NS16550_COM1		0x01c20000
+#define CONFIG_SYS_NS16550_CLK		CONFIG_SYS_HZ_CLOCK
+#define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }
+#define CONFIG_CONS_INDEX		1
+#define CONFIG_BAUDRATE			115200
+
+/* Ethernet:  external DM9000 */
+#define CONFIG_DRIVER_DM9000		1
+#define CONFIG_DM9000_BASE		0x04014000
+#define DM9000_IO			CONFIG_DM9000_BASE
+#define DM9000_DATA			(CONFIG_DM9000_BASE + 2)
+
+/* I2C */
+#define CONFIG_HARD_I2C
+#define CONFIG_DRIVER_DAVINCI_I2C
+#define CONFIG_SYS_I2C_SPEED		400000
+#define CONFIG_SYS_I2C_SLAVE		0x10	/* SMBus host address */
+
+/* NAND: socketed, two chipselects, normally 2 GBytes */
+/* NYET -- #define CONFIG_NAND_DAVINCI */
+#define CONFIG_SYS_NAND_HW_ECC
+#define CONFIG_SYS_NAND_USE_FLASH_BBT
+
+#define CONFIG_SYS_NAND_LARGEPAGE
+#define CONFIG_SYS_NAND_BASE_LIST	{ 0x02000000, }
+/* socket has two chipselects, nCE0 gated by address BIT(14) */
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+#define CONFIG_SYS_NAND_MAX_CHIPS	2
+
+/* USB: OTG connector */
+/* NYET -- #define CONFIG_USB_DAVINCI */
+
+/* U-Boot command configuration */
+#include <config_cmd_default.h>
+
+#undef CONFIG_CMD_BDI
+#undef CONFIG_CMD_FLASH
+#undef CONFIG_CMD_FPGA
+#undef CONFIG_CMD_SETGETDCR
+
+#define CONFIG_CMD_ASKENV
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_I2C
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_SAVES
+
+#ifdef CONFIG_NAND_DAVINCI
+#define CONFIG_CMD_MTDPARTS
+#define CONFIG_MTD_PARTITIONS
+#define CONFIG_CMD_NAND
+#define CONFIG_CMD_UBI
+#define CONFIG_RBTREE
+#endif
+
+/* TEMPORARY -- no safe place to save env, yet */
+#define CONFIG_ENV_IS_NOWHERE
+#undef CONFIG_CMD_SAVEENV
+
+#ifdef CONFIG_USB_DAVINCI
+#define CONFIG_MUSB_HCD
+#define CONFIG_CMD_USB
+#define CONFIG_USB_STORAGE
+#else
+#undef CONFIG_MUSB_HCD
+#undef CONFIG_CMD_USB
+#undef CONFIG_USB_STORAGE
+#endif
+
+#define CONFIG_CRC32_VERIFY
+#define CONFIG_MX_CYCLIC
+
+/* U-Boot general configuration */
+#undef CONFIG_USE_IRQ				/* No IRQ/FIQ in U-Boot */
+#define CONFIG_BOOTFILE		"uImage"	/* Boot file name */
+#define CONFIG_SYS_PROMPT	"DM355 EVM # "	/* Monitor Command Prompt */
+#define CONFIG_SYS_CBSIZE	1024		/* Console I/O Buffer Size  */
+#define CONFIG_SYS_PBSIZE			/* Print buffer size */ \
+		(CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
+#define CONFIG_SYS_MAXARGS	16		/* max number of command args */
+#define CONFIG_SYS_HUSH_PARSER
+#define CONFIG_SYS_PROMPT_HUSH_PS2	"> "
+#define CONFIG_SYS_LONGHELP
+
+#define CONFIG_ENV_SIZE		SZ_16K
+
+/* NYET -- #define CONFIG_BOOTDELAY	5 */
+#define CONFIG_BOOTCOMMAND \
+		"dhcp;bootm"
+#define CONFIG_BOOTARGS \
+		"console=ttyS0,115200n8 " \
+		"root=/dev/mmcblk0p1 rootwait rootfstype=ext3 ro"
+
+#define CONFIG_CMDLINE_EDITING
+#define CONFIG_VERSION_VARIABLE
+#define CONFIG_TIMESTAMP
+
+#define CONFIG_NET_RETRY_COUNT 10
+
+/* U-Boot memory configuration */
+#define CONFIG_STACKSIZE		SZ_256K		/* regular stack */
+#define CONFIG_SYS_MALLOC_LEN		SZ_512K		/* malloc() arena */
+#define CONFIG_SYS_GBL_DATA_SIZE	128		/* for initial data */
+#define CONFIG_SYS_MEMTEST_START	0x87000000	/* physical address */
+#define CONFIG_SYS_MEMTEST_END		0x88000000	/* test 16MB RAM */
+
+/* Linux interfacing */
+#define CONFIG_CMDLINE_TAG
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_SYS_BARGSIZE	1024			/* bootarg Size */
+#define CONFIG_SYS_LOAD_ADDR	0x80700000		/* kernel address */
+
+
+/* NAND configuration ... socketed with two chipselects.  It normally comes
+ * with a 2GByte SLC part with 2KB pages (and 128KB erase blocks); other
+ * 2GByte parts may have 4KB pages, 256KB erase blocks, and use MLC.  (MLC
+ * pretty much demands the 4-bit ECC support.)  You can of course swap in
+ * other parts, including small page ones.
+ *
+ * This presents a single read-only partition for all bootloader stuff.
+ * UBL (1+ block), U-Boot (256KB+), U-Boot environment (one block), and
+ * some extra space to help cope with bad blocks in that data.  Linux
+ * shouldn't care about its detailed layout, and will probably want to use
+ * UBI/UBFS for the rest (except maybe on smallpage chips).  It's easy to
+ * override this default partitioning using MTDPARTS and cmdlinepart.
+ */
+#define MTDIDS_DEFAULT		"nand0=davinci_nand.0"
+
+#ifdef CONFIG_SYS_NAND_LARGEPAGE
+/*  Use same layout for 128K/256K blocks; allow some bad blocks */
+#define PART_BOOT		"2m(bootloader)ro,"
+#else
+/* Assume 16K erase blocks; allow a few bad ones. */
+#define PART_BOOT		"512k(bootloader)ro,"
+#endif
+
+#define PART_KERNEL		"4m(kernel),"	/* kernel + initramfs */
+#define PART_REST		"-(filesystem)"
+
+#define MTDPARTS_DEFAULT	\
+	"mtdparts=davinci_nand.0:" PART_BOOT PART_KERNEL PART_REST
+
+#endif /* __CONFIG_H */