| /* |
| * (C) Copyright 2000 |
| * Marius Groeger <mgroeger@sysgo.de> |
| * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| * |
| * (C) Copyright 2000, 2001 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| * |
| * (C) Copyright 2001 |
| * Advent Networks, Inc. <http://www.adventnetworks.com> |
| * Oliver Brown <oliverb@alumni.utexas.net> |
| * |
| *-------------------------------------------------------------------- |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| /*********************************************************************/ |
| /* DESCRIPTION: |
| * This file contains the flash routines for the GW8260 board. |
| * |
| * |
| * |
| * MODULE DEPENDENCY: |
| * None |
| * |
| * |
| * RESTRICTIONS/LIMITATIONS: |
| * |
| * Only supports the following flash devices: |
| * AMD 29F080B |
| * AMD 29F016D |
| * |
| * Copyright (c) 2001, Advent Networks, Inc. |
| * |
| */ |
| /*********************************************************************/ |
| |
| #include <common.h> |
| #include <mpc8260.h> |
| |
| flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
| |
| static ulong flash_get_size (vu_long *addr, flash_info_t *info); |
| static int write_word (flash_info_t *info, ulong dest, ulong data); |
| |
| /*********************************************************************/ |
| /* functions */ |
| /*********************************************************************/ |
| |
| /*********************************************************************/ |
| /* NAME: flash_init() - initializes flash banks */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* This function initializes the flash bank(s). */ |
| /* */ |
| /* RETURNS: */ |
| /* The size in bytes of the flash */ |
| /* */ |
| /* RESTRICTIONS/LIMITATIONS: */ |
| /* */ |
| /* */ |
| /*********************************************************************/ |
| unsigned long flash_init (void) |
| { |
| unsigned long size; |
| int i; |
| |
| /* Init: no FLASHes known */ |
| for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
| flash_info[i].flash_id = FLASH_UNKNOWN; |
| } |
| |
| /* for now, only support the 4 MB Flash SIMM */ |
| size = flash_get_size((vu_long *)CONFIG_SYS_FLASH0_BASE, &flash_info[0]); |
| |
| /* |
| * protect monitor and environment sectors |
| */ |
| |
| #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE |
| flash_protect(FLAG_PROTECT_SET, |
| CONFIG_SYS_MONITOR_BASE, |
| CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, |
| &flash_info[0]); |
| #endif |
| |
| #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) |
| # ifndef CONFIG_ENV_SIZE |
| # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE |
| # endif |
| flash_protect(FLAG_PROTECT_SET, |
| CONFIG_ENV_ADDR, |
| CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, |
| &flash_info[0]); |
| #endif |
| |
| return (CONFIG_SYS_FLASH0_SIZE * 1024 * 1024); /*size*/ |
| } |
| |
| /*********************************************************************/ |
| /* NAME: flash_print_info() - prints flash imformation */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* This function prints the flash information. */ |
| /* */ |
| /* INPUTS: */ |
| /* flash_info_t *info - flash information structure */ |
| /* */ |
| /* OUTPUTS: */ |
| /* Displays flash information to console */ |
| /* */ |
| /* RETURNS: */ |
| /* None */ |
| /* */ |
| /* RESTRICTIONS/LIMITATIONS: */ |
| /* */ |
| /* */ |
| /*********************************************************************/ |
| void flash_print_info (flash_info_t *info) |
| { |
| int i; |
| |
| if (info->flash_id == FLASH_UNKNOWN) { |
| printf ("missing or unknown FLASH type\n"); |
| return; |
| } |
| |
| switch ((info->flash_id >> 16) & 0xff) { |
| case 0x1: |
| printf ("AMD "); |
| break; |
| default: |
| printf ("Unknown Vendor "); |
| break; |
| } |
| |
| switch (info->flash_id & FLASH_TYPEMASK) { |
| case AMD_ID_F040B: |
| printf ("AM29F040B (4 Mbit)\n"); |
| break; |
| case AMD_ID_F080B: |
| printf ("AM29F080B (8 Mbit)\n"); |
| break; |
| case AMD_ID_F016D: |
| printf ("AM29F016D (16 Mbit)\n"); |
| break; |
| default: |
| printf ("Unknown Chip Type\n"); |
| break; |
| } |
| |
| 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) == 0) |
| printf ("\n "); |
| printf (" %08lX%s", |
| info->start[i], |
| info->protect[i] ? " (RO)" : " " |
| ); |
| } |
| printf ("\n"); |
| return; |
| } |
| |
| /*********************************************************************/ |
| /* The following code cannot be run from FLASH! */ |
| /*********************************************************************/ |
| |
| /*********************************************************************/ |
| /* NAME: flash_get_size() - detects the flash size */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* 1) Reads vendor ID and devices ID from the flash devices. */ |
| /* 2) Initializes flash info struct. */ |
| /* 3) Return the flash size */ |
| /* */ |
| /* INPUTS: */ |
| /* vu_long *addr - pointer to start of flash */ |
| /* flash_info_t *info - flash information structure */ |
| /* */ |
| /* OUTPUTS: */ |
| /* None */ |
| /* */ |
| /* RETURNS: */ |
| /* Size of the flash in bytes, or 0 if device id is unknown. */ |
| /* */ |
| /* RESTRICTIONS/LIMITATIONS: */ |
| /* Only supports the following devices: */ |
| /* AM29F080D */ |
| /* AM29F016D */ |
| /* */ |
| /*********************************************************************/ |
| static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
| { |
| short i; |
| vu_long vendor, devid; |
| ulong base = (ulong)addr; |
| |
| /*printf("addr = %08lx\n", (unsigned long)addr); */ |
| |
| /* Reset and Write auto select command: read Manufacturer ID */ |
| addr[0x0000] = 0xf0f0f0f0; |
| addr[0x0555] = 0xAAAAAAAA; |
| addr[0x02AA] = 0x55555555; |
| addr[0x0555] = 0x90909090; |
| udelay (1000); |
| |
| vendor = addr[0]; |
| /*printf("vendor = %08lx\n", vendor); */ |
| if (vendor != 0x01010101) { |
| info->size = 0; |
| goto out; |
| } |
| |
| devid = addr[1]; |
| /*printf("devid = %08lx\n", devid); */ |
| |
| if ((devid & 0xff) == AMD_ID_F080B) { |
| info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F080B; |
| /* we have 16 sectors with 64KB each x 4 */ |
| info->sector_count = 16; |
| info->size = 4 * info->sector_count * 64*1024; |
| } else if ((devid & 0xff) == AMD_ID_F016D){ |
| info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F016D; |
| /* we have 32 sectors with 64KB each x 4 */ |
| info->sector_count = 32; |
| info->size = 4 * info->sector_count * 64*1024; |
| } else { |
| info->size = 0; |
| goto out; |
| } |
| /*printf("sector count = %08x\n", info->sector_count); */ |
| /* check for protected sectors */ |
| for (i = 0; i < info->sector_count; i++) { |
| /* sector base address */ |
| info->start[i] = base + i * (info->size / info->sector_count); |
| /* read sector protection at sector address, (A7 .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr = (volatile unsigned long *)(info->start[i]); |
| info->protect[i] = addr[2] & 1; |
| } |
| |
| /* reset command */ |
| addr = (vu_long *)info->start[0]; |
| |
| out: |
| addr[0] = 0xf0f0f0f0; |
| |
| /*printf("size = %08x\n", info->size); */ |
| return info->size; |
| } |
| |
| /*********************************************************************/ |
| /* NAME: flash_erase() - erases flash by sector */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* This function erases flash sectors starting for s_first to */ |
| /* s_last. */ |
| /* */ |
| /* INPUTS: */ |
| /* flash_info_t *info - flash information structure */ |
| /* int s_first - first sector to erase */ |
| /* int s_last - last sector to erase */ |
| /* */ |
| /* OUTPUTS: */ |
| /* None */ |
| /* */ |
| /* RETURNS: */ |
| /* Returns 0 for success, 1 for failure. */ |
| /* */ |
| /* RESTRICTIONS/LIMITATIONS: */ |
| /* */ |
| /*********************************************************************/ |
| int flash_erase (flash_info_t *info, int s_first, int s_last) |
| { |
| vu_long *addr = (vu_long*)(info->start[0]); |
| int flag, prot, sect, l_sect; |
| ulong start, now, last; |
| |
| if ((s_first < 0) || (s_first > s_last)) { |
| if (info->flash_id == FLASH_UNKNOWN) { |
| printf ("- missing\n"); |
| } else { |
| printf ("- no sectors to erase\n"); |
| } |
| return 1; |
| } |
| |
| prot = 0; |
| for (sect = s_first; sect <= s_last; sect++) { |
| if (info->protect[sect]) { |
| prot++; |
| } |
| } |
| |
| if (prot) { |
| printf ("- Warning: %d protected sectors will not be erased!\n", |
| prot); |
| } else { |
| printf ("\n"); |
| } |
| |
| l_sect = -1; |
| |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| addr[0x0555] = 0xAAAAAAAA; |
| addr[0x02AA] = 0x55555555; |
| addr[0x0555] = 0x80808080; |
| addr[0x0555] = 0xAAAAAAAA; |
| addr[0x02AA] = 0x55555555; |
| udelay (100); |
| |
| /* Start erase on unprotected sectors */ |
| for (sect = s_first; sect <= s_last; sect++) { |
| if (info->protect[sect] == 0) { /* not protected */ |
| addr = (vu_long*)(info->start[sect]); |
| addr[0] = 0x30303030; |
| l_sect = sect; |
| } |
| } |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* wait at least 80us - let's wait 1 ms */ |
| udelay (1000); |
| |
| /* |
| * We wait for the last triggered sector |
| */ |
| if (l_sect < 0) |
| goto DONE; |
| |
| start = get_timer (0); |
| last = start; |
| addr = (vu_long*)(info->start[l_sect]); |
| while ((addr[0] & 0x80808080) != 0x80808080) { |
| if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
| printf ("Timeout\n"); |
| return 1; |
| } |
| /* show that we're waiting */ |
| if ((now - last) > 1000) { /* every second */ |
| serial_putc ('.'); |
| last = now; |
| } |
| } |
| |
| DONE: |
| /* reset to read mode */ |
| addr = (volatile unsigned long *)info->start[0]; |
| addr[0] = 0xF0F0F0F0; /* reset bank */ |
| |
| printf (" done\n"); |
| return 0; |
| } |
| |
| /*********************************************************************/ |
| /* NAME: write_buff() - writes a buffer to flash */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* This function copies a buffer, *src, to flash. */ |
| /* */ |
| /* INPUTS: */ |
| /* flash_info_t *info - flash information structure */ |
| /* uchar *src - pointer to buffer to write to flash */ |
| /* ulong addr - address to start write at */ |
| /* ulong cnt - number of bytes to write to flash */ |
| /* */ |
| /* OUTPUTS: */ |
| /* None */ |
| /* */ |
| /* RETURNS: */ |
| /* 0 - OK */ |
| /* 1 - write timeout */ |
| /* 2 - Flash not erased */ |
| /* */ |
| /* RESTRICTIONS/LIMITATIONS: */ |
| /* */ |
| /*********************************************************************/ |
| int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| { |
| ulong cp, wp, data; |
| int i, l, rc; |
| |
| wp = (addr & ~3); /* get lower word aligned address */ |
| |
| /* |
| * handle unaligned start bytes |
| */ |
| if ((l = addr - wp) != 0) { |
| data = 0; |
| for (i = 0, cp = wp; i < l; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| for (; (i < 4) && (cnt > 0); ++i) { |
| data = (data << 8) | *src++; |
| --cnt; |
| ++cp; |
| } |
| for (; (cnt == 0) && (i < 4); ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| if ((rc = write_word(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| } |
| |
| /* |
| * handle word aligned part |
| */ |
| while (cnt >= 4) { |
| data = 0; |
| for (i = 0; i < 4; ++i) { |
| data = (data << 8) | *src++; |
| } |
| if ((rc = write_word(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| cnt -= 4; |
| } |
| |
| if (cnt == 0) { |
| return (0); |
| } |
| |
| /* |
| * handle unaligned tail bytes |
| */ |
| data = 0; |
| for (i = 0, cp = wp; (i < 4) && (cnt > 0); ++i, ++cp) { |
| data = (data << 8) | *src++; |
| --cnt; |
| } |
| for (; (i < 4); ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| return (write_word(info, wp, data)); |
| } |
| |
| /*********************************************************************/ |
| /* NAME: write_word() - writes a word to flash */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* This writes a single word to flash. */ |
| /* */ |
| /* INPUTS: */ |
| /* flash_info_t *info - flash information structure */ |
| /* ulong dest - address to write */ |
| /* ulong data - data to write */ |
| /* */ |
| /* OUTPUTS: */ |
| /* None */ |
| /* */ |
| /* RETURNS: */ |
| /* 0 - OK */ |
| /* 1 - write timeout */ |
| /* 2 - Flash not erased */ |
| /* */ |
| /* RESTRICTIONS/LIMITATIONS: */ |
| /* */ |
| /*********************************************************************/ |
| static int write_word (flash_info_t *info, ulong dest, ulong data) |
| { |
| vu_long *addr = (vu_long*)(info->start[0]); |
| ulong start; |
| int flag; |
| |
| /* Check if Flash is (sufficiently) erased */ |
| if ((*((vu_long *)dest) & data) != data) { |
| return (2); |
| } |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| addr[0x0555] = 0xAAAAAAAA; |
| addr[0x02AA] = 0x55555555; |
| addr[0x0555] = 0xA0A0A0A0; |
| |
| *((vu_long *)dest) = data; |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* data polling for D7 */ |
| start = get_timer (0); |
| while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) { |
| if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
| return (1); |
| } |
| } |
| return (0); |
| } |
| /*********************************************************************/ |
| /* End of flash.c */ |
| /*********************************************************************/ |
