diff options
Diffstat (limited to 'board/wepep250')
| -rw-r--r-- | board/wepep250/Makefile | 47 | ||||
| -rw-r--r-- | board/wepep250/config.mk | 11 | ||||
| -rw-r--r-- | board/wepep250/flash.c | 321 | ||||
| -rw-r--r-- | board/wepep250/intel.h | 100 | ||||
| -rw-r--r-- | board/wepep250/memsetup.S | 147 | ||||
| -rw-r--r-- | board/wepep250/u-boot.lds | 55 | ||||
| -rw-r--r-- | board/wepep250/wepep250.c | 77 |
7 files changed, 758 insertions, 0 deletions
diff --git a/board/wepep250/Makefile b/board/wepep250/Makefile new file mode 100644 index 0000000..d4314d7 --- /dev/null +++ b/board/wepep250/Makefile @@ -0,0 +1,47 @@ +# +# (C) Copyright 2000, 2002 +# Wolfgang Denk, DENX Software Engineering, wd@denx.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 $(TOPDIR)/config.mk + +LIB = lib$(BOARD).a + +OBJS := wepep250.o flash.o +SOBJS := memsetup.o + +$(LIB): $(OBJS) $(SOBJS) + $(AR) crv $@ $^ + +clean: + rm -f $(SOBJS) $(OBJS) + +distclean: clean + rm -f $(LIB) core *.bak .depend + +######################################################################### + +.depend: Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c) + $(CC) -M $(CPPFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@ + +-include .depend + +######################################################################### diff --git a/board/wepep250/config.mk b/board/wepep250/config.mk new file mode 100644 index 0000000..792f0ee --- /dev/null +++ b/board/wepep250/config.mk @@ -0,0 +1,11 @@ +# +# This is config used for compilation of WEP EP250 sources +# +# You might change location of U-Boot in memory by setting right TEXT_BASE. +# This allows for example having one copy located at the end of ram and stored +# in flash device and later on while developing use other location to test +# the code in RAM device only. +# + +TEXT_BASE = 0xa1fe0000 +#TEXT_BASE = 0xa1001000
\ No newline at end of file diff --git a/board/wepep250/flash.c b/board/wepep250/flash.c new file mode 100644 index 0000000..319dddc --- /dev/null +++ b/board/wepep250/flash.c @@ -0,0 +1,321 @@ +/* + * Copyright (C) 2003 ETC s.r.o. + * + * This code was inspired by Marius Groeger and Kyle Harris code + * available in other board ports for U-Boot + * + * 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 + * + * Written by Peter Figuli <peposh@etc.sk>, 2003. + * + */ + +#include <common.h> +#include "intel.h" + + +/* + * This code should handle CFI FLASH memory device. This code is very + * minimalistic approach without many essential error handling code as well. + * Because U-Boot actually is missing smart handling of FLASH device, + * we just set flash_id to anything else to FLASH_UNKNOW, so common code + * can call us without any restrictions. + * TODO: Add CFI Query, to be able to determine FLASH device. + * TODO: Add error handling code + * NOTE: This code was tested with BUS_WIDTH 4 and ITERLEAVE 2 only, but + * hopefully may work with other configurations. + */ + +#if ( WEP_FLASH_BUS_WIDTH == 1 ) +# define FLASH_BUS vu_char +# if ( WEP_FLASH_INTERLEAVE == 1 ) +# define FLASH_CMD( x ) x +# else +# error "With 8bit bus only one chip is allowed" +# endif + + +#elif ( WEP_FLASH_BUS_WIDTH == 2 ) +# define FLASH_BUS vu_short +# if ( WEP_FLASH_INTERLEAVE == 1 ) +# define FLASH_CMD( x ) x +# elif ( WEP_FLASH_INTERLEAVE == 2 ) +# define FLASH_CMD( x ) (( x << 8 )| x ) +# else +# error "With 16bit bus only 1 or 2 chip(s) are allowed" +# endif + + +#elif ( WEP_FLASH_BUS_WIDTH == 4 ) +# define FLASH_BUS vu_long +# if ( WEP_FLASH_INTERLEAVE == 1 ) +# define FLASH_CMD( x ) x +# elif ( WEP_FLASH_INTERLEAVE == 2 ) +# define FLASH_CMD( x ) (( x << 16 )| x ) +# elif ( WEP_FLASH_INTERLEAVE == 4 ) +# define FLASH_CMD( x ) (( x << 24 )|( x << 16 ) ( x << 8 )| x ) +# else +# error "With 32bit bus only 1,2 or 4 chip(s) are allowed" +# endif + +#else +# error "Flash bus width might be 1,2,4 for 8,16,32 bit configuration" +#endif + + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + +static FLASH_BUS flash_status_reg (void) +{ + + FLASH_BUS *addr = (FLASH_BUS *) 0; + + *addr = FLASH_CMD (CFI_INTEL_CMD_READ_STATUS_REGISTER); + + return *addr; +} + +static int flash_ready (ulong timeout) +{ + int ok = 1; + + reset_timer_masked (); + while ((flash_status_reg () & FLASH_CMD (CFI_INTEL_SR_READY)) != + FLASH_CMD (CFI_INTEL_SR_READY)) { + if (get_timer_masked () > timeout && timeout != 0) { + ok = 0; + break; + } + } + return ok; +} + +#if ( CFG_MAX_FLASH_BANKS != 1 ) +# error "WEP platform has only one flash bank!" +#endif + + +ulong flash_init (void) +{ + int i; + FLASH_BUS address = WEP_FLASH_BASE; + + flash_info[0].size = WEP_FLASH_BANK_SIZE; + flash_info[0].sector_count = CFG_MAX_FLASH_SECT; + flash_info[0].flash_id = INTEL_MANUFACT; + memset (flash_info[0].protect, 0, CFG_MAX_FLASH_SECT); + + for (i = 0; i < CFG_MAX_FLASH_SECT; i++) { + flash_info[0].start[i] = address; +#ifdef WEP_FLASH_UNLOCK + /* Some devices are hw locked after start. */ + *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_LOCK_SETUP); + *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_UNLOCK_BLOCK); + flash_ready (0); + *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY); +#endif + address += WEP_FLASH_SECT_SIZE; + } + + flash_protect (FLAG_PROTECT_SET, + CFG_FLASH_BASE, + CFG_FLASH_BASE + _armboot_end_data - _armboot_start, + &flash_info[0]); + + flash_protect (FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); + + return WEP_FLASH_BANK_SIZE; +} + +void flash_print_info (flash_info_t * info) +{ + int i; + + printf (" Intel vendor\n"); + printf (" Size: %ld MB in %d Sectors\n", + info->size >> 20, info->sector_count); + + printf (" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; i++) { + if (!(i % 5)) { + printf ("\n"); + } + + printf (" %08lX%s", info->start[i], + info->protect[i] ? " (RO)" : " "); + } + printf ("\n"); +} + + +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + int flag, non_protected = 0, sector; + int rc = ERR_OK; + + FLASH_BUS *address; + + for (sector = s_first; sector <= s_last; sector++) { + if (!info->protect[sector]) { + non_protected++; + } + } + + if (!non_protected) { + return ERR_PROTECTED; + } + + /* + * Disable interrupts which might cause a timeout + * here. Remember that our exception vectors are + * at address 0 in the flash, and we don't want a + * (ticker) exception to happen while the flash + * chip is in programming mode. + */ + flag = disable_interrupts (); + + + /* Start erase on unprotected sectors */ + for (sector = s_first; sector <= s_last && !ctrlc (); sector++) { + if (info->protect[sector]) { + printf ("Protected sector %2d skipping...\n", sector); + continue; + } else { + printf ("Erasing sector %2d ... ", sector); + } + + address = (FLASH_BUS *) (info->start[sector]); + + *address = FLASH_CMD (CFI_INTEL_CMD_BLOCK_ERASE); + *address = FLASH_CMD (CFI_INTEL_CMD_CONFIRM); + if (flash_ready (CFG_FLASH_ERASE_TOUT)) { + *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER); + printf ("ok.\n"); + } else { + *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND); + rc = ERR_TIMOUT; + printf ("timeout! Aborting...\n"); + break; + } + *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY); + } + if (ctrlc ()) + printf ("User Interrupt!\n"); + + /* allow flash to settle - wait 10 ms */ + udelay_masked (10000); + if (flag) { + enable_interrupts (); + } + + return rc; +} + +static int write_data (flash_info_t * info, ulong dest, FLASH_BUS data) +{ + FLASH_BUS *address = (FLASH_BUS *) dest; + int rc = ERR_OK; + int flag; + + /* Check if Flash is (sufficiently) erased */ + if ((*address & data) != data) { + return ERR_NOT_ERASED; + } + + /* + * Disable interrupts which might cause a timeout + * here. Remember that our exception vectors are + * at address 0 in the flash, and we don't want a + * (ticker) exception to happen while the flash + * chip is in programming mode. + */ + + flag = disable_interrupts (); + + *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER); + *address = FLASH_CMD (CFI_INTEL_CMD_PROGRAM1); + *address = data; + + if (!flash_ready (CFG_FLASH_WRITE_TOUT)) { + *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND); + rc = ERR_TIMOUT; + printf ("timeout! Aborting...\n"); + } + + *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY); + if (flag) { + enable_interrupts (); + } + + return rc; +} + +int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + ulong read_addr, write_addr; + FLASH_BUS data; + int i, result = ERR_OK; + + + read_addr = addr & ~(sizeof (FLASH_BUS) - 1); + write_addr = read_addr; + if (read_addr != addr) { + data = 0; + for (i = 0; i < sizeof (FLASH_BUS); i++) { + if (read_addr < addr || cnt == 0) { + data |= *((uchar *) read_addr) << i * 8; + } else { + data |= (*src++) << i * 8; + cnt--; + } + read_addr++; + } + if ((result = write_data (info, write_addr, data)) != ERR_OK) { + return result; + } + write_addr += sizeof (FLASH_BUS); + } + for (; cnt >= sizeof (FLASH_BUS); cnt -= sizeof (FLASH_BUS)) { + if ((result = write_data (info, write_addr, + *((FLASH_BUS *) src))) != ERR_OK) { + return result; + } + write_addr += sizeof (FLASH_BUS); + src += sizeof (FLASH_BUS); + } + if (cnt > 0) { + read_addr = write_addr; + data = 0; + for (i = 0; i < sizeof (FLASH_BUS); i++) { + if (cnt > 0) { + data |= (*src++) << i * 8; + cnt--; + } else { + data |= *((uchar *) read_addr) << i * 8; + } + read_addr++; + } + if ((result = write_data (info, write_addr, data)) != 0) { + return result; + } + } + return ERR_OK; +} diff --git a/board/wepep250/intel.h b/board/wepep250/intel.h new file mode 100644 index 0000000..f622590 --- /dev/null +++ b/board/wepep250/intel.h @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2002 ETC s.r.o. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the ETC s.r.o. nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Written by Marcel Telka <marcel@telka.sk>, 2002. + * + * Documentation: + * [1] Intel Corporation, "3 Volt Intel Strata Flash Memory 28F128J3A, 28F640J3A, + * 28F320J3A (x8/x16)", April 2002, Order Number: 290667-011 + * [2] Intel Corporation, "3 Volt Synchronous Intel Strata Flash Memory 28F640K3, 28F640K18, + * 28F128K3, 28F128K18, 28F256K3, 28F256K18 (x16)", June 2002, Order Number: 290737-005 + * + * This file is taken from OpenWinCE project hosted by SourceForge.net + * + */ + +#ifndef FLASH_INTEL_H +#define FLASH_INTEL_H + +#include <common.h> + +/* Intel CFI commands - see Table 4. in [1] and Table 3. in [2] */ + +#define CFI_INTEL_CMD_READ_ARRAY 0xFF /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_READ_IDENTIFIER 0x90 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_READ_QUERY 0x98 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_READ_STATUS_REGISTER 0x70 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_CLEAR_STATUS_REGISTER 0x50 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_PROGRAM1 0x40 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_PROGRAM2 0x10 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_WRITE_TO_BUFFER 0xE8 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_CONFIRM 0xD0 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_BLOCK_ERASE 0x20 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_SUSPEND 0xB0 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_RESUME 0xD0 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_LOCK_SETUP 0x60 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_LOCK_BLOCK 0x01 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_UNLOCK_BLOCK 0xD0 /* 28FxxxJ3A - unlocks all blocks, 28FFxxxK3, 28FxxxK18 */ +#define CFI_INTEL_CMD_LOCK_DOWN_BLOCK 0x2F /* 28FxxxK3, 28FxxxK18 */ + +/* Intel CFI Status Register bits - see Table 6. in [1] and Table 7. in [2] */ + +#define CFI_INTEL_SR_READY 1 << 7 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_ERASE_SUSPEND 1 << 6 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_ERASE_ERROR 1 << 5 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_PROGRAM_ERROR 1 << 4 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_VPEN_ERROR 1 << 3 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_PROGRAM_SUSPEND 1 << 2 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_BLOCK_LOCKED 1 << 1 /* 28FxxxJ3A, 28FxxxK3, 28FxxxK18 */ +#define CFI_INTEL_SR_BEFP 1 << 0 /* 28FxxxK3, 28FxxxK18 */ + +/* Intel flash device ID codes for 28FxxxJ3A - see Table 5. in [1] */ + +#define CFI_CHIP_INTEL_28F320J3A 0x0016 +#define CFI_CHIPN_INTEL_28F320J3A "28F320J3A" +#define CFI_CHIP_INTEL_28F640J3A 0x0017 +#define CFI_CHIPN_INTEL_28F640J3A "28F640J3A" +#define CFI_CHIP_INTEL_28F128J3A 0x0018 +#define CFI_CHIPN_INTEL_28F128J3A "28F128J3A" + +/* Intel flash device ID codes for 28FxxxK3 and 28FxxxK18 - see Table 8. in [2] */ + +#define CFI_CHIP_INTEL_28F640K3 0x8801 +#define CFI_CHIPN_INTEL_28F640K3 "28F640K3" +#define CFI_CHIP_INTEL_28F128K3 0x8802 +#define CFI_CHIPN_INTEL_28F128K3 "28F128K3" +#define CFI_CHIP_INTEL_28F256K3 0x8803 +#define CFI_CHIPN_INTEL_28F256K3 "28F256K3" +#define CFI_CHIP_INTEL_28F640K18 0x8805 +#define CFI_CHIPN_INTEL_28F640K18 "28F640K18" +#define CFI_CHIP_INTEL_28F128K18 0x8806 +#define CFI_CHIPN_INTEL_28F128K18 "28F128K18" +#define CFI_CHIP_INTEL_28F256K18 0x8807 +#define CFI_CHIPN_INTEL_28F256K18 "28F256K18" + +#endif /* FLASH_INTEL_H */ + diff --git a/board/wepep250/memsetup.S b/board/wepep250/memsetup.S new file mode 100644 index 0000000..8a5d42f --- /dev/null +++ b/board/wepep250/memsetup.S @@ -0,0 +1,147 @@ +/* + * Copyright (C) 2001, 2002 ETC s.r.o. + * + * 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. + * + * Written by Marcel Telka <marcel@telka.sk>, 2001, 2002. + * Changes for U-Boot Peter Figuli <peposh@etc.sk>, 2003. + * + * This file is taken from OpenWinCE project hosted by SourceForge.net + * + * Documentation: + * [1] Intel Corporation, "Intel PXA250 and PXA210 Application Processors + * Developer's Manual", February 2002, Order Number: 278522-001 + * [2] Samsung Electronics, "8Mx16 SDRAM 54CSP K4S281633D-RL/N/P", + * Revision 1.0, February 2002 + * [3] Samsung Electronics, "16Mx16 SDRAM 54CSP K4S561633C-RL(N)", + * Revision 1.0, February 2002 + * +*/ + +#include <config.h> +#include <version.h> +#include <asm/arch/pxa-regs.h> + +.globl memsetup +memsetup: + + mov r10, lr + +/* setup memory - see 6.12 in [1] + * Step 1 - wait 200 us + */ + mov r0,#0x2700 /* wait 200 us @ 99.5 MHz */ +1: subs r0, r0, #1 + bne 1b +/* TODO: complete step 1 for Synchronous Static memory*/ + + ldr r0, =0x48000000 /* MC_BASE */ + + + +/* step 1.a - setup MSCx + */ + ldr r1, =0x000012B3 /* MSC0_RRR0(1) | MSC0_RDN0(2) | MSC0_RDF0(11) | MSC0_RT0(3) */ + str r1, [r0, #0x8] /* MSC0_OFFSET */ + +/* step 1.c - clear MDREFR:K1FREE, set MDREFR:DRI + * see AUTO REFRESH chapter in section D. in [2] and in [3] + * DRI = (64ms / 4096) * 99.53MHz / 32 = 48 for K4S281633 + * DRI = (64ms / 8192) * 99.52MHz / 32 = 24 for K4S561633 + * TODO: complete for Synchronous Static memory + */ + ldr r1, [r0, #4] /* MDREFR_OFFSET */ + ldr r2, =0x01000FFF /* MDREFR_K1FREE | MDREFR_DRI_MASK */ + bic r1, r1, r2 +#if defined( WEP_SDRAM_K4S281633 ) + orr r1, r1, #48 /* MDREFR_DRI(48) */ +#elif defined( WEP_SDRAM_K4S561633 ) + orr r1, r1, #24 /* MDREFR_DRI(24) */ +#else +#error SDRAM chip is not defined +#endif + + str r1, [r0, #4] /* MDREFR_OFFSET */ + +/* Step 2 - only for Synchronous Static memory (TODO) + * + * Step 3 - same as step 4 + * + * Step 4 + * + * Step 4.a - set MDREFR:K1RUN, clear MDREFR:K1DB2 + */ + orr r1, r1, #0x00010000 /* MDREFR_K1RUN */ + bic r1, r1, #0x00020000 /* MDREFR_K1DB2 */ + str r1, [r0, #4] /* MDREFR_OFFSET */ + +/* Step 4.b - clear MDREFR:SLFRSH */ + bic r1, r1, #0x00400000 /* MDREFR_SLFRSH */ + str r1, [r0, #4] /* MDREFR_OFFSET */ + +/* Step 4.c - set MDREFR:E1PIN */ + orr r1, r1, #0x00008000 /* MDREFR_E1PIN */ + str r1, [r0, #4] /* MDREFR_OFFSET */ + +/* Step 4.d - automatically done + * + * Steps 4.e and 4.f - configure SDRAM + */ +#if defined( WEP_SDRAM_K4S281633 ) + ldr r1, =0x00000AA8 /* MDCNFG_DTC0(2) | MDCNFG_DLATCH0 | MDCNFG_DCAC0(1) | MDCNFG_DRAC0(1) | MDCNFG_DNB0 */ +#elif defined( WEP_SDRAM_K4S561633 ) + ldr r1, =0x00000AC8 /* MDCNFG_DTC0(2) | MDCNFG_DLATCH0 | MDCNFG_DCAC0(1) | MDCNFG_DRAC0(2) | MDCNFG_DNB0 */ +#else +#error SDRAM chip is not defined +#endif + str r1, [r0, #0] /* MDCNFG_OFFSET */ + +/* Step 5 - wait at least 200 us for SDRAM + * see section B. in [2] + */ + mov r2,#0x2700 /* wait 200 us @ 99.5 MHz */ +1: subs r2, r2, #1 + bne 1b + +/* Step 6 - after reset dcache is disabled, so automatically done + * + * Step 7 - eight refresh cycles + */ + mov r2, #0xA0000000 + ldr r3, [r2] + ldr r3, [r2] + ldr r3, [r2] + ldr r3, [r2] + ldr r3, [r2] + ldr r3, [r2] + ldr r3, [r2] + ldr r3, [r2] + +/* Step 8 - we don't need dcache now + * + * Step 9 - enable SDRAM partition 0 + */ + orr r1, r1, #1 /* MDCNFG_DE0 */ + str r1, [r0, #0] /* MDCNFG_OFFSET */ + +/* Step 10 - write MDMRS */ + mov r1, #0 + str r1, [r0, #0x40] /* MDMRS_OFFSET */ + +/* Step 11 - optional (TODO) */ + + mov pc,r10 + diff --git a/board/wepep250/u-boot.lds b/board/wepep250/u-boot.lds new file mode 100644 index 0000000..280fc48 --- /dev/null +++ b/board/wepep250/u-boot.lds @@ -0,0 +1,55 @@ +/* + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.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 + */ + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +SECTIONS +{ + . = 0x00000000; + + . = ALIGN(4); + .text : + { + cpu/xscale/start.o (.text) + *(.text) + } + + . = ALIGN(4); + .rodata : { *(.rodata) } + + . = ALIGN(4); + .data : { *(.data) } + + . = ALIGN(4); + .got : { *(.got) } + + armboot_end_data = .; + + . = ALIGN(4); + bss_start = .; + .bss : { *(.bss) } + bss_end = .; + + armboot_end = .; +} diff --git a/board/wepep250/wepep250.c b/board/wepep250/wepep250.c new file mode 100644 index 0000000..ebf75d7 --- /dev/null +++ b/board/wepep250/wepep250.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2003 ETC s.r.o. + * + * 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 + * + * Written by Peter Figuli <peposh@etc.sk>, 2003. + * + */ + +#include <common.h> +#include <asm/arch/pxa-regs.h> + +int board_init( void ){ + DECLARE_GLOBAL_DATA_PTR; + + gd->bd->bi_arch_number = 288; + gd->bd->bi_boot_params = 0xa0000000; +/* + * Setup GPIO stuff to get serial working + */ +#if defined( CONFIG_FFUART ) + GPDR1 = 0x80; + GAFR1_L = 0x8010; +#elif defined( CONFIG_BTUART ) + GPDR1 = 0x800; + GAFR1_L = 0x900000; +#endif + PSSR = 0x20; + +/* + * Following code is just bug workaround, remove it if not neccessary + */ + + /* cpu/xscale/cpu.c do not set armboot_real_end that is used for + malloc pool.*/ + if( _armboot_real_end == 0xbadc0de ){ + _armboot_real_end = _armboot_end; + } + return 0; +} + +int dram_init( void ){ + DECLARE_GLOBAL_DATA_PTR; + +#if ( CONFIG_NR_DRAM_BANKS > 0 ) + gd->bd->bi_dram[0].start = WEP_SDRAM_1; + gd->bd->bi_dram[0].size = WEP_SDRAM_1_SIZE; +#endif +#if ( CONFIG_NR_DRAM_BANKS > 1 ) + gd->bd->bi_dram[1].start = WEP_SDRAM_2; + gd->bd->bi_dram[1].size = WEP_SDRAM_2_SIZE; +#endif +#if ( CONFIG_NR_DRAM_BANKS > 2 ) + gd->bd->bi_dram[2].start = WEP_SDRAM_3; + gd->bd->bi_dram[2].size = WEP_SDRAM_3_SIZE; +#endif +#if ( CONFIG_NR_DRAM_BANKS > 3 ) + gd->bd->bi_dram[3].start = WEP_SDRAM_4; + gd->bd->bi_dram[3].size = WEP_SDRAM_4_SIZE; +#endif + + return 0; +} + |