From 28b00324becf3552134ae1e086509dc9c3d6e932 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Fri, 15 May 2009 23:48:37 +0200 Subject: 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 --- board/davinci/dm355evm/Makefile | 52 ++++++++++++++++++ board/davinci/dm355evm/config.mk | 11 ++++ board/davinci/dm355evm/dm355evm.c | 108 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 171 insertions(+) create mode 100644 board/davinci/dm355evm/Makefile create mode 100644 board/davinci/dm355evm/config.mk create mode 100644 board/davinci/dm355evm/dm355evm.c (limited to 'board/davinci') diff --git a/board/davinci/dm355evm/Makefile b/board/davinci/dm355evm/Makefile new file mode 100644 index 0000000..26b0705 --- /dev/null +++ b/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 +# +# 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 + +######################################################################### diff --git a/board/davinci/dm355evm/config.mk b/board/davinci/dm355evm/config.mk new file mode 100644 index 0000000..c4e6e07 --- /dev/null +++ b/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 diff --git a/board/davinci/dm355evm/dm355evm.c b/board/davinci/dm355evm/dm355evm.c new file mode 100644 index 0000000..398f527 --- /dev/null +++ b/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 +#include +#include +#include +#include +#include +#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 -- cgit v1.1