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author | wdenk <wdenk> | 2002-11-03 01:41:26 (GMT) |
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committer | wdenk <wdenk> | 2002-11-03 01:41:26 (GMT) |
commit | afd7f3d0de7be71ee90478d4dde00dc1a8f9d204 (patch) | |
tree | be7d638bea029fb086b90b6ed4f2f32277524ace /board/gw8260/flash.c | |
parent | f18f47f4d40689d85829f6ea18642abacd45ad0e (diff) | |
download | u-boot-fsl-qoriq-afd7f3d0de7be71ee90478d4dde00dc1a8f9d204.tar.xz |
Initial revision
Diffstat (limited to 'board/gw8260/flash.c')
-rw-r--r-- | board/gw8260/flash.c | 523 |
1 files changed, 523 insertions, 0 deletions
diff --git a/board/gw8260/flash.c b/board/gw8260/flash.c new file mode 100644 index 0000000..532dd19 --- /dev/null +++ b/board/gw8260/flash.c @@ -0,0 +1,523 @@ +/* + * (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[CFG_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<CFG_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 *)CFG_FLASH0_BASE, &flash_info[0]); + + /* + * protect monitor and environment sectors + */ + +#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, + &flash_info[0]); +#endif + +#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[0]); +#endif + + return (CFG_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)) > CFG_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) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + return (0); +} +/*********************************************************************/ +/* End of flash.c */ +/*********************************************************************/ |