645 lines
16 KiB
C
645 lines
16 KiB
C
/*
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* (C) Copyright 2001
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* Keith Outwater, keith_outwater@mvsi.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <mpc8xx.h>
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#if defined(CONFIG_ENV_IS_IN_FLASH)
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# ifndef CONFIG_ENV_ADDR
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# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
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# endif
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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# ifndef CONFIG_ENV_SECT_SIZE
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# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
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# endif
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#endif
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/*
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* Use buffered writes to flash by default - they are about 32x faster than
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* single byte writes.
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*/
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#ifndef CONFIG_SYS_GEN860T_FLASH_USE_WRITE_BUFFER
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#define CONFIG_SYS_GEN860T_FLASH_USE_WRITE_BUFFER
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#endif
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/*
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* Max time to wait (in mS) for flash device to allocate a write buffer.
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*/
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#ifndef CONFIG_SYS_FLASH_ALLOC_BUFFER_TOUT
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#define CONFIG_SYS_FLASH_ALLOC_BUFFER_TOUT 100
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#endif
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/*
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* These functions support a single Intel StrataFlash device (28F128J3A)
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* in byte mode only!. The flash routines are very basic and simple
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* since there isn't really any remapping necessary.
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*/
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/*
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* Intel SCS (Scalable Command Set) command definitions
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* (taken from 28F128J3A datasheet)
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*/
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#define SCS_READ_CMD 0xff
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#define SCS_READ_ID_CMD 0x90
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#define SCS_QUERY_CMD 0x98
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#define SCS_READ_STATUS_CMD 0x70
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#define SCS_CLEAR_STATUS_CMD 0x50
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#define SCS_WRITE_BUF_CMD 0xe8
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#define SCS_PROGRAM_CMD 0x40
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#define SCS_BLOCK_ERASE_CMD 0x20
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#define SCS_BLOCK_ERASE_RESUME_CMD 0xd0
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#define SCS_PROGRAM_RESUME_CMD 0xd0
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#define SCS_BLOCK_ERASE_SUSPEND_CMD 0xb0
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#define SCS_SET_BLOCK_LOCK_CMD 0x60
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#define SCS_CLR_BLOCK_LOCK_CMD 0x60
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/*
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* SCS status/extended status register bit definitions
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*/
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#define SCS_SR7 0x80
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#define SCS_XSR7 0x80
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/*---------------------------------------------------------------------*/
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#if 0
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#define DEBUG_FLASH
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#endif
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#ifdef DEBUG_FLASH
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#define PRINTF(fmt,args...) printf(fmt ,##args)
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#else
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#define PRINTF(fmt,args...)
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#endif
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/*---------------------------------------------------------------------*/
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size (vu_char *addr, flash_info_t *info);
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static int write_data8 (flash_info_t *info, ulong dest, uchar data);
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static void flash_get_offsets (ulong base, flash_info_t *info);
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/*-----------------------------------------------------------------------
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* Initialize the flash memory.
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*/
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unsigned long
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flash_init (void)
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{
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volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
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volatile memctl8xx_t *memctl = &immap->im_memctl;
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unsigned long size_b0;
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int i;
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for (i= 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/*
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* The gen860t board only has one FLASH memory device, so the
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* FLASH Bank configuration is done statically.
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*/
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PRINTF("\n## Get flash bank 1 size @ 0x%08x\n", FLASH_BASE0_PRELIM);
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size_b0 = flash_get_size((vu_char *)FLASH_BASE0_PRELIM, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank 0: "
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"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
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flash_info[0].flash_id,size_b0, size_b0 << 20);
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}
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PRINTF("## Before remap:\n"
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" BR0: 0x%08x OR0: 0x%08x\n BR1: 0x%08x OR1: 0x%08x\n",
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memctl->memc_br0, memctl->memc_or0,
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memctl->memc_br1, memctl->memc_or1);
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/*
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* Remap FLASH according to real size
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*/
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memctl->memc_or0 |= (-size_b0 & 0xFFFF8000);
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memctl->memc_br0 |= (CONFIG_SYS_FLASH_BASE & BR_BA_MSK);
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PRINTF("## After remap:\n"
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" BR0: 0x%08x OR0: 0x%08x\n", memctl->memc_br0, memctl->memc_or0);
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/*
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* Re-do sizing to get full correct info
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*/
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size_b0 = flash_get_size ((vu_char *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
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flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
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flash_info[0].size = size_b0;
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#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
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/*
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* Monitor protection is ON by default
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*/
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
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&flash_info[0]);
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#endif
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#ifdef CONFIG_ENV_IS_IN_FLASH
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/*
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* Environment protection ON by default
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*/
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
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&flash_info[0]);
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#endif
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PRINTF("## Final Flash bank size: 0x%08lx\n",size_b0);
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return (size_b0);
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}
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/*-----------------------------------------------------------------------
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* Fill in the FLASH offset table
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*/
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static void
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flash_get_offsets (ulong base, flash_info_t *info)
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{
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int i;
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if (info->flash_id == FLASH_UNKNOWN) {
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return;
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}
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_INTEL:
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base;
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base += 1024 * 128;
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}
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return;
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default:
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printf ("Don't know sector offsets for FLASH"
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" type 0x%lx\n", info->flash_id);
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return;
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}
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}
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/*-----------------------------------------------------------------------
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* Display FLASH device info
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*/
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void
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flash_print_info (flash_info_t *info)
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{
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int i;
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("Missing or unknown FLASH type\n");
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return;
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}
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_INTEL:
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printf ("Intel ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_28F128J3A:
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printf ("28F128J3A (128Mbit = 128K x 128)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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break;
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}
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if (info->size >= (1024 * 1024)) {
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i = 20;
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} else {
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i = 10;
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}
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printf (" Size: %ld %cB in %d Sectors\n",
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info->size >> i,
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(i == 20) ? 'M' : 'k',
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info->sector_count);
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printf (" Sector Start Addresses:");
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for (i=0; i<info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s",
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info->start[i],
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info->protect[i] ? " (RO)" : " "
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);
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}
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printf ("\n");
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return;
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}
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/*-----------------------------------------------------------------------
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* Get size and other information for a FLASH device.
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* NOTE: The following code cannot be run from FLASH!
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*/
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static
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ulong flash_get_size (vu_char *addr, flash_info_t *info)
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{
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#define NO_FLASH 0
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vu_char value[2];
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/*
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* Try to read the manufacturer ID
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*/
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addr[0] = SCS_READ_CMD;
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addr[0] = SCS_READ_ID_CMD;
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value[0] = addr[0];
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value[1] = addr[2];
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addr[0] = SCS_READ_CMD;
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PRINTF("Manuf. ID @ 0x%08lx: 0x%02x\n", (ulong)addr, value[0]);
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switch (value[0]) {
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case (INTEL_MANUFACT & 0xff):
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info->flash_id = FLASH_MAN_INTEL;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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return (NO_FLASH);
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}
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/*
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* Read the device ID
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*/
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PRINTF("Device ID @ 0x%08lx: 0x%02x\n", (ulong)(&addr[2]), value[1]);
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switch (value[1]) {
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case (INTEL_ID_28F128J3A & 0xff):
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info->flash_id += FLASH_28F128J3A;
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info->sector_count = 128;
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info->size = 16 * 1024 * 1024;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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return (NO_FLASH);
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}
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if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
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printf ("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
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info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
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}
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return (info->size);
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}
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/*-----------------------------------------------------------------------
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* Erase the specified sectors in the specified FLASH device
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*/
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int
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flash_erase(flash_info_t *info, int s_first, int s_last)
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{
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int flag, prot, sect;
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ulong start, now, last;
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if ((s_first < 0) || (s_first > s_last)) {
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("- missing\n");
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} else {
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printf ("- no sectors to erase\n");
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}
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return 1;
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}
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if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
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printf ("Can erase only Intel flash types - aborted\n");
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return 1;
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}
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prot = 0;
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for (sect=s_first; sect<=s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot) {
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printf ("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf ("\n");
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}
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start = get_timer (0);
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last = start;
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/*
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* Start erase on unprotected sectors
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*/
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for (sect = s_first; sect<=s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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vu_char *addr = (uchar *)(info->start[sect]);
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vu_char status;
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/*
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* Disable interrupts which might cause a timeout
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*/
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flag = disable_interrupts();
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*addr = SCS_CLEAR_STATUS_CMD;
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*addr = SCS_BLOCK_ERASE_CMD;
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*addr = SCS_BLOCK_ERASE_RESUME_CMD;
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/*
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* Re-enable interrupts if necessary
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*/
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if (flag)
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enable_interrupts();
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/*
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* Wait at least 80us - let's wait 1 ms
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*/
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udelay (1000);
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while (((status = *addr) & SCS_SR7) != SCS_SR7) {
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if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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*addr = SCS_BLOCK_ERASE_SUSPEND_CMD;
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*addr = SCS_READ_CMD;
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return 1;
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}
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/*
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* Show that we're waiting
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*/
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if ((now - last) > 1000) { /* 1 second */
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putc ('.');
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last = now;
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}
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}
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*addr = SCS_READ_CMD;
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}
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}
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printf (" done\n");
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return 0;
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}
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#ifdef CONFIG_SYS_GEN860T_FLASH_USE_WRITE_BUFFER
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/*
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* Allocate a flash buffer, fill it with data and write it to the flash.
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* 0 - OK
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* 1 - Timeout on buffer request
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*
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* NOTE: After the last call to this function, WSM status needs to be checked!
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*/
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static int
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write_flash_buffer8(flash_info_t *info_p, vu_char *src_p, vu_char *dest_p,
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uint count)
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{
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vu_char *block_addr_p = NULL;
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vu_char *start_addr_p = NULL;
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ulong blocksize = info_p->size / (ulong)info_p->sector_count;
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int i;
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uint time = get_timer(0);
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PRINTF("%s:%d: src: 0x%p dest: 0x%p count: %d\n",
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__FUNCTION__, __LINE__, src_p, dest_p, count);
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/*
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* What block are we in? We already know that the source address is
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* in the flash address range, but we also can't cross a block boundary.
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* We assume that the block does not cross a boundary (we'll check before
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* calling this function).
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*/
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for (i = 0; i < info_p->sector_count; ++i) {
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if ( ((ulong)dest_p >= info_p->start[i]) &&
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((ulong)dest_p < (info_p->start[i] + blocksize)) ) {
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PRINTF("%s:%d: Dest addr 0x%p is in block %d @ 0x%.8lx\n",
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__FUNCTION__, __LINE__, dest_p, i, info_p->start[i]);
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block_addr_p = (vu_char *)info_p->start[i];
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break;
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}
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}
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/*
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* Request a buffer
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*/
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*block_addr_p = SCS_WRITE_BUF_CMD;
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while ((*block_addr_p & SCS_XSR7) != SCS_XSR7) {
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if (get_timer(time) > CONFIG_SYS_FLASH_ALLOC_BUFFER_TOUT) {
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PRINTF("%s:%d: Buffer allocation timeout @ 0x%p (waited %d mS)\n",
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__FUNCTION__, __LINE__, block_addr_p,
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CONFIG_SYS_FLASH_ALLOC_BUFFER_TOUT);
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return 1;
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}
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*block_addr_p = SCS_WRITE_BUF_CMD;
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}
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/*
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* Fill the buffer with data
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*/
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start_addr_p = dest_p;
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*block_addr_p = count - 1; /* flash device wants count - 1 */
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PRINTF("%s:%d: Fill buffer at block addr 0x%p\n",
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__FUNCTION__, __LINE__, block_addr_p);
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for (i = 0; i < count; i++) {
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*start_addr_p++ = *src_p++;
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}
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/*
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* Flush buffer to flash
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*/
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*block_addr_p = SCS_PROGRAM_RESUME_CMD;
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#if 1
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time = get_timer(0);
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while ((*block_addr_p & SCS_SR7) != SCS_SR7) {
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if (get_timer(time) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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PRINTF("%s:%d: Write timeout @ 0x%p (waited %d mS)\n",
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__FUNCTION__, __LINE__, block_addr_p, CONFIG_SYS_FLASH_WRITE_TOUT);
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return 1;
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}
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}
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#endif
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return 0;
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}
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#endif
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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* 4 - Flash not identified
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*/
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int
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write_buff(flash_info_t *info_p, uchar *src_p, ulong addr, ulong count)
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{
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int rc = 0;
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#ifdef CONFIG_SYS_GEN860T_FLASH_USE_WRITE_BUFFER
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#define FLASH_WRITE_BUF_SIZE 0x00000020 /* 32 bytes */
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int i;
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uint bufs;
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ulong buf_count;
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vu_char *sp;
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vu_char *dp;
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#else
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ulong wp;
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#endif
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PRINTF("\n%s:%d: src: 0x%.8lx dest: 0x%.8lx size: %d (0x%.8lx)\n",
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__FUNCTION__, __LINE__, (ulong)src_p, addr, (uint)count, count);
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if (info_p->flash_id == FLASH_UNKNOWN) {
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return 4;
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}
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#ifdef CONFIG_SYS_GEN860T_FLASH_USE_WRITE_BUFFER
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sp = src_p;
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dp = (uchar *)addr;
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/*
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* For maximum performance, we want to align the start address to
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* the beginning of a write buffer boundary (i.e. A4-A0 of the
|
|
* start address = 0). See how many bytes are required to get to a
|
|
* write-buffer-aligned address. If that number is non-zero, do
|
|
* non buffered writes of the non-aligned data. By doing non-buffered
|
|
* writes, we avoid the problem of crossing a block (sector) boundary
|
|
* with buffered writes.
|
|
*/
|
|
buf_count = FLASH_WRITE_BUF_SIZE - (addr & (FLASH_WRITE_BUF_SIZE - 1));
|
|
if (buf_count == FLASH_WRITE_BUF_SIZE) { /* already on a boundary */
|
|
buf_count = 0;
|
|
}
|
|
if (buf_count > count) { /* not a full buffers worth of data to write */
|
|
buf_count = count;
|
|
}
|
|
count -= buf_count;
|
|
|
|
PRINTF("%s:%d: Write buffer alignment count = %ld\n",
|
|
__FUNCTION__, __LINE__, buf_count);
|
|
while (buf_count-- >= 1) {
|
|
if ((rc = write_data8(info_p, (ulong)dp++, *sp++)) != 0) {
|
|
return (rc);
|
|
}
|
|
}
|
|
|
|
PRINTF("%s:%d: count = %ld\n", __FUNCTION__, __LINE__, count);
|
|
if (count == 0) { /* all done */
|
|
PRINTF("%s:%d: Less than 1 buffer (%d) worth of bytes\n",
|
|
__FUNCTION__, __LINE__, FLASH_WRITE_BUF_SIZE);
|
|
return (rc);
|
|
}
|
|
|
|
/*
|
|
* Now that we are write buffer aligned, write full or partial buffers.
|
|
* The fact that we are write buffer aligned automatically avoids
|
|
* crossing a block address during a write buffer operation.
|
|
*/
|
|
bufs = count / FLASH_WRITE_BUF_SIZE;
|
|
PRINTF("%s:%d: %d (0x%x) buffers to write\n", __FUNCTION__, __LINE__,
|
|
bufs, bufs);
|
|
while (bufs >= 1) {
|
|
rc = write_flash_buffer8(info_p, sp, dp, FLASH_WRITE_BUF_SIZE);
|
|
if (rc != 0) {
|
|
PRINTF("%s:%d: ** Error writing buf %d\n",
|
|
__FUNCTION__, __LINE__, bufs);
|
|
return (rc);
|
|
}
|
|
bufs--;
|
|
sp += FLASH_WRITE_BUF_SIZE;
|
|
dp += FLASH_WRITE_BUF_SIZE;
|
|
}
|
|
|
|
/*
|
|
* Do the leftovers
|
|
*/
|
|
i = count % FLASH_WRITE_BUF_SIZE;
|
|
PRINTF("%s:%d: %d (0x%x) leftover bytes\n", __FUNCTION__, __LINE__, i, i);
|
|
if (i > 0) {
|
|
rc = write_flash_buffer8(info_p, sp, dp, i);
|
|
}
|
|
|
|
sp = (vu_char*)info_p->start[0];
|
|
*sp = SCS_READ_CMD;
|
|
return (rc);
|
|
|
|
#else
|
|
wp = addr;
|
|
while (count-- >= 1) {
|
|
if((rc = write_data8(info_p, wp++, *src_p++)) != 0)
|
|
return (rc);
|
|
}
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Write a byte to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int
|
|
write_data8 (flash_info_t *info, ulong dest, uchar data)
|
|
{
|
|
vu_char *addr = (vu_char *)dest;
|
|
vu_char status;
|
|
ulong start;
|
|
int flag;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*addr & data) != data) {
|
|
return (2);
|
|
}
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
*addr = SCS_PROGRAM_CMD;
|
|
*addr = data;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
start = get_timer (0);
|
|
|
|
while (((status = *addr) & SCS_SR7) != SCS_SR7) {
|
|
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
*addr = SCS_READ_CMD;
|
|
return (1);
|
|
}
|
|
}
|
|
*addr = SCS_READ_CMD;
|
|
return (0);
|
|
}
|
|
|
|
/* vim: set ts=4 sw=4 tw=78: */
|