561 lines
14 KiB
C
561 lines
14 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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*
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* (C) Copyright 2002
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* Gregory E. Allen, gallen@arlut.utexas.edu
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* Matthew E. Karger, karger@arlut.utexas.edu
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* Applied Research Laboratories, The University of Texas at Austin
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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 <mpc824x.h>
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#include <asm/processor.h>
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#define ROM_CS0_START 0xFF800000
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#define ROM_CS1_START 0xFF000000
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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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#define FLASH_BANK_SIZE ((uint)(16 * 1024 * 1024)) /* max 16Mbyte */
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#define MAIN_SECT_SIZE 0x10000
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#define SECT_SIZE_32KB 0x8000
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#define SECT_SIZE_8KB 0x2000
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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static int write_word (flash_info_t * info, ulong dest, ulong data);
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#if 0
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static void write_via_fpu (vu_long * addr, ulong * data);
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#endif
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static __inline__ unsigned long get_msr (void);
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static __inline__ void set_msr (unsigned long msr);
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/*flash command address offsets*/
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#define ADDR0 (0x555)
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#define ADDR1 (0xAAA)
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#define ADDR3 (0x001)
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#define FLASH_WORD_SIZE unsigned char
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/*---------------------------------------------------------------------*/
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/*#define DEBUG_FLASH 1 */
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/*---------------------------------------------------------------------*/
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unsigned long flash_init (void)
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{
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int i; /* flash bank counter */
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int j; /* flash device sector counter */
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int k; /* flash size calculation loop counter */
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int N; /* pow(2,N) is flash size, but we don't have <math.h> */
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ulong total_size = 0, device_size = 1;
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unsigned char manuf_id, device_id;
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
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vu_char *addr = (vu_char *) (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE);
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addr[0x555] = 0xAA; /* get manuf/device info command */
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addr[0x2AA] = 0x55; /* 3-cycle command */
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addr[0x555] = 0x90;
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manuf_id = addr[0]; /* read back manuf/device info */
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device_id = addr[1];
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addr[0x55] = 0x98; /* CFI command */
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N = addr[0x27]; /* read back device_size = pow(2,N) */
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for (k = 0; k < N; k++) /* calculate device_size = pow(2,N) */
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device_size *= 2;
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flash_info[i].size = device_size;
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flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
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#if defined DEBUG_FLASH
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printf ("manuf_id = %x, device_id = %x\n", manuf_id, device_id);
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#endif
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/* find out what kind of flash we are using */
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if ((manuf_id == (uchar) (AMD_MANUFACT))
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&& (device_id == AMD_ID_LV033C)) {
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flash_info[i].flash_id =
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((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
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(FLASH_AM033C & FLASH_TYPEMASK);
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/* set individual sector start addresses */
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for (j = 0; j < flash_info[i].sector_count; j++) {
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flash_info[i].start[j] =
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(CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE +
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j * MAIN_SECT_SIZE);
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}
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}
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else if ((manuf_id == (uchar) (AMD_MANUFACT)) &&
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(device_id == AMD_ID_LV116DT)) {
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flash_info[i].flash_id =
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((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
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(FLASH_AM160T & FLASH_TYPEMASK);
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/* set individual sector start addresses */
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for (j = 0; j < flash_info[i].sector_count; j++) {
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flash_info[i].start[j] =
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(CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE +
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j * MAIN_SECT_SIZE);
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if (j < (CONFIG_SYS_MAX_FLASH_SECT - 3)) {
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flash_info[i].start[j] =
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(CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE +
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j * MAIN_SECT_SIZE);
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} else if (j == (CONFIG_SYS_MAX_FLASH_SECT - 3)) {
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flash_info[i].start[j] =
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(flash_info[i].start[j - 1] + SECT_SIZE_32KB);
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} else {
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flash_info[i].start[j] =
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(flash_info[i].start[j - 1] + SECT_SIZE_8KB);
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}
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}
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}
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else {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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addr[0] = 0xFF;
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goto Done;
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}
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#if defined DEBUG_FLASH
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printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
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#endif
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addr[0] = 0xFF;
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memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
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total_size += flash_info[i].size;
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}
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/* Protect monitor and environment sectors
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*/
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#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
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flash_protect (FLAG_PROTECT_SET, 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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#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
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flash_protect (FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
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#endif
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Done:
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return total_size;
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}
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/*-----------------------------------------------------------------------
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*/
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void flash_print_info (flash_info_t * info)
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{
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static const char unk[] = "Unknown";
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const char *mfct = unk, *type = unk;
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unsigned int i;
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if (info->flash_id != FLASH_UNKNOWN) {
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_AMD:
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mfct = "AMD";
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break;
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case FLASH_MAN_FUJ:
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mfct = "FUJITSU";
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break;
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case FLASH_MAN_STM:
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mfct = "STM";
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break;
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case FLASH_MAN_SST:
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mfct = "SST";
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break;
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case FLASH_MAN_BM:
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mfct = "Bright Microelectonics";
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break;
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case FLASH_MAN_INTEL:
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mfct = "Intel";
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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_AM033C:
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type = "AM29LV033C (32 Mbit, uniform sector size)";
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break;
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case FLASH_AM160T:
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type = "AM29LV160T (16 Mbit, top boot sector)";
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break;
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case FLASH_AM040:
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type = "AM29F040B (512K * 8, uniform sector size)";
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break;
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case FLASH_AM400B:
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type = "AM29LV400B (4 Mbit, bottom boot sect)";
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break;
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case FLASH_AM400T:
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type = "AM29LV400T (4 Mbit, top boot sector)";
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break;
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case FLASH_AM800B:
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type = "AM29LV800B (8 Mbit, bottom boot sect)";
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break;
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case FLASH_AM800T:
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type = "AM29LV800T (8 Mbit, top boot sector)";
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break;
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case FLASH_AM320B:
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type = "AM29LV320B (32 Mbit, bottom boot sect)";
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break;
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case FLASH_AM320T:
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type = "AM29LV320T (32 Mbit, top boot sector)";
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break;
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case FLASH_STM800AB:
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type = "M29W800AB (8 Mbit, bottom boot sect)";
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break;
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case FLASH_SST800A:
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type = "SST39LF/VF800 (8 Mbit, uniform sector size)";
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break;
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case FLASH_SST160A:
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type = "SST39LF/VF160 (16 Mbit, uniform sector size)";
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break;
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}
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}
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printf ("\n Brand: %s Type: %s\n"
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" Size: %lu KB in %d Sectors\n",
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mfct, type, info->size >> 10, 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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unsigned long size;
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unsigned int erased;
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unsigned long *flash = (unsigned long *) info->start[i];
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/*
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* Check if whole sector is erased
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*/
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size = (i != (info->sector_count - 1)) ?
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(info->start[i + 1] - info->start[i]) >> 2 :
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(info->start[0] + info->size - info->start[i]) >> 2;
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for (flash = (unsigned long *) info->start[i], erased = 1;
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(flash != (unsigned long *) info->start[i] + size) && erased;
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flash++)
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erased = *flash == ~0x0UL;
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printf ("%s %08lX %s %s",
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(i % 5) ? "" : "\n ",
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info->start[i],
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erased ? "E" : " ", info->protect[i] ? "RO" : " ");
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}
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puts ("\n");
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return;
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}
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/*-----------------------------------------------------------------------
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*/
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int flash_erase (flash_info_t * info, int s_first, int s_last)
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{
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volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
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int flag, prot, sect, l_sect;
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ulong start, now, last;
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unsigned char sh8b;
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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_UNKNOWN) ||
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(info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
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printf ("Can't erase unknown flash type - 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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l_sect = -1;
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/* Check the ROM CS */
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if ((info->start[0] >= ROM_CS1_START)
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&& (info->start[0] < ROM_CS0_START))
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sh8b = 3;
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else
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sh8b = 0;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts ();
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addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
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addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
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addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
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/* Start erase on unprotected sectors */
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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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addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->
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start[sect] -
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info->
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start[0]) <<
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sh8b));
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if (info->flash_id & FLASH_MAN_SST) {
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addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
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addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
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addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
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addr[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
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udelay (30000); /* wait 30 ms */
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} else {
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addr[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
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}
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l_sect = sect;
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}
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}
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts ();
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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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/*
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* We wait for the last triggered sector
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*/
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if (l_sect < 0)
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goto DONE;
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start = get_timer (0);
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last = start;
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addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] -
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info->
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start[0]) << sh8b));
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while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
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(FLASH_WORD_SIZE) 0x00800080) {
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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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return 1;
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}
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/* show that we're waiting */
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if ((now - last) > 1000) { /* every second */
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serial_putc ('.');
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last = now;
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}
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}
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DONE:
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/* reset to read mode */
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addr = (FLASH_WORD_SIZE *) info->start[0];
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addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
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printf (" done\n");
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return 0;
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}
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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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*/
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int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong cp, wp, data;
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int i, l, rc;
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wp = (addr & ~3); /* get lower word aligned address */
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/*
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* handle unaligned start bytes
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*/
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if ((l = addr - wp) != 0) {
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data = 0;
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for (i = 0, cp = wp; i < l; ++i, ++cp) {
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data = (data << 8) | (*(uchar *) cp);
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}
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for (; i < 4 && cnt > 0; ++i) {
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data = (data << 8) | *src++;
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--cnt;
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++cp;
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}
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for (; cnt == 0 && i < 4; ++i, ++cp) {
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data = (data << 8) | (*(uchar *) cp);
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}
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if ((rc = write_word (info, wp, data)) != 0) {
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return (rc);
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}
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wp += 4;
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}
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/*
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* handle word aligned part
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*/
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while (cnt >= 4) {
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data = 0;
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for (i = 0; i < 4; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_word (info, wp, data)) != 0) {
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return (rc);
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}
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wp += 4;
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cnt -= 4;
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}
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if (cnt == 0) {
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return (0);
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}
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/*
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* handle unaligned tail bytes
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*/
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data = 0;
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for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
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data = (data << 8) | *src++;
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--cnt;
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}
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for (; i < 4; ++i, ++cp) {
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data = (data << 8) | (*(uchar *) cp);
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}
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return (write_word (info, wp, data));
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}
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/*-----------------------------------------------------------------------
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* Write a word 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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*/
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static int write_word (flash_info_t * info, ulong dest, ulong data)
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{
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volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) info->start[0];
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volatile FLASH_WORD_SIZE *dest2;
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volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
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ulong start;
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int flag;
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int i;
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unsigned char sh8b;
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/* Check the ROM CS */
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if ((info->start[0] >= ROM_CS1_START)
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&& (info->start[0] < ROM_CS0_START))
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sh8b = 3;
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else
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sh8b = 0;
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dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) +
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info->start[0]);
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/* Check if Flash is (sufficiently) erased */
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if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
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return (2);
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}
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts ();
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|
|
for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
|
|
addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
|
|
addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
|
|
addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0;
|
|
|
|
dest2[i << sh8b] = data2[i];
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) !=
|
|
(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
|
|
if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
#if 0
|
|
static void write_via_fpu (vu_long * addr, ulong * data)
|
|
{
|
|
__asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data));
|
|
__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
|
|
}
|
|
#endif
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
static __inline__ unsigned long get_msr (void)
|
|
{
|
|
unsigned long msr;
|
|
|
|
__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
|
|
|
|
return msr;
|
|
}
|
|
|
|
static __inline__ void set_msr (unsigned long msr)
|
|
{
|
|
__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
|
|
}
|