diff options
Diffstat (limited to 'u-boot/board/hymod/flash.c')
| -rw-r--r-- | u-boot/board/hymod/flash.c | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/u-boot/board/hymod/flash.c b/u-boot/board/hymod/flash.c new file mode 100644 index 0000000..e2cf38c --- /dev/null +++ b/u-boot/board/hymod/flash.c @@ -0,0 +1,506 @@ +/* + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * Hacked for the Hymod board by Murray.Jensen@csiro.au, 20-Oct-00 + */ + +#include <common.h> +#include <mpc8260.h> +#include <board/hymod/flash.h> + +flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +/*----------------------------------------------------------------------- + * Protection Flags: + */ +#define FLAG_PROTECT_SET 0x01 +#define FLAG_PROTECT_CLEAR 0x02 + +/*----------------------------------------------------------------------- + */ + +/* + * probe for flash bank at address "base" and store info about it + * in the flash_info entry "fip". Fatal error if nothing there. + */ +static void +bank_probe (flash_info_t *fip, volatile bank_addr_t base) +{ + volatile bank_addr_t addr; + bank_word_t word; + int i; + + /* reset the flash */ + *base = BANK_CMD_RST; + + /* put flash into read id mode */ + *base = BANK_CMD_RD_ID; + + /* check the manufacturer id - must be intel */ + word = *BANK_REG_MAN_CODE (base); + if (word != BANK_FILL_WORD (INTEL_MANUFACT&0xff)) + panic ("\nbad manufacturer's code (0x%08lx) at addr 0x%08lx", + (unsigned long)word, (unsigned long)base); + + /* check the device id */ + word = *BANK_REG_DEV_CODE (base); + switch (word) { + + case BANK_FILL_WORD (INTEL_ID_28F320J5&0xff): + fip->flash_id = FLASH_MAN_INTEL | FLASH_28F320J5; + fip->sector_count = 32; + break; + + case BANK_FILL_WORD (INTEL_ID_28F640J5&0xff): + fip->flash_id = FLASH_MAN_INTEL | FLASH_28F640J5; + fip->sector_count = 64; + break; + + case BANK_FILL_WORD (INTEL_ID_28F320J3A&0xff): + fip->flash_id = FLASH_MAN_INTEL | FLASH_28F320J3A; + fip->sector_count = 32; + break; + + case BANK_FILL_WORD (INTEL_ID_28F640J3A&0xff): + fip->flash_id = FLASH_MAN_INTEL | FLASH_28F640J3A; + fip->sector_count = 64; + break; + + case BANK_FILL_WORD (INTEL_ID_28F128J3A&0xff): + fip->flash_id = FLASH_MAN_INTEL | FLASH_28F128J3A; + fip->sector_count = 128; + break; + + default: + panic ("\nbad device code (0x%08lx) at addr 0x%08lx", + (unsigned long)word, (unsigned long)base); + } + + if (fip->sector_count >= CONFIG_SYS_MAX_FLASH_SECT) + panic ("\ntoo many sectors (%d) in flash at address 0x%08lx", + fip->sector_count, (unsigned long)base); + + addr = base; + for (i = 0; i < fip->sector_count; i++) { + fip->start[i] = (unsigned long)addr; + fip->protect[i] = 0; + addr = BANK_ADDR_NEXT_BLK (addr); + } + + fip->size = (bank_size_t)addr - (bank_size_t)base; + + /* reset the flash */ + *base = BANK_CMD_RST; +} + +static void +bank_reset (flash_info_t *info, int sect) +{ + volatile bank_addr_t addr = (bank_addr_t)info->start[sect]; + +#ifdef FLASH_DEBUG + printf ("writing reset cmd to addr 0x%08lx\n", (unsigned long)addr); +#endif + + *addr = BANK_CMD_RST; +} + +static void +bank_erase_init (flash_info_t *info, int sect) +{ + volatile bank_addr_t addr = (bank_addr_t)info->start[sect]; + int flag; + +#ifdef FLASH_DEBUG + printf ("erasing sector %d, addr = 0x%08lx\n", + sect, (unsigned long)addr); +#endif + + /* Disable intrs which might cause a timeout here */ + flag = disable_interrupts (); + +#ifdef FLASH_DEBUG + printf ("writing erase cmd to addr 0x%08lx\n", (unsigned long)addr); +#endif + *addr = BANK_CMD_ERASE1; + *addr = BANK_CMD_ERASE2; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); +} + +static int +bank_erase_poll (flash_info_t *info, int sect) +{ + volatile bank_addr_t addr = (bank_addr_t)info->start[sect]; + bank_word_t stat = *addr; + +#ifdef FLASH_DEBUG + printf ("checking status at addr 0x%08lx [0x%08lx]\n", + (unsigned long)addr, (unsigned long)stat); +#endif + + if ((stat & BANK_STAT_RDY) == BANK_STAT_RDY) { + if ((stat & BANK_STAT_ERR) != 0) { + printf ("failed on sector %d [0x%08lx] at " + "address 0x%08lx\n", sect, + (unsigned long)stat, (unsigned long)addr); + *addr = BANK_CMD_CLR_STAT; + return (-1); + } + else + return (1); + } + else + return (0); +} + +static int +bank_write_word (volatile bank_addr_t addr, bank_word_t value) +{ + bank_word_t stat; + ulong start; + int flag, retval; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + *addr = BANK_CMD_PROG; + + *addr = value; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + retval = 0; + + /* data polling for D7 */ + start = get_timer (0); + do { + if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { + retval = 1; + goto done; + } + stat = *addr; + } while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY); + + if ((stat & BANK_STAT_ERR) != 0) { + printf ("flash program failed [0x%08lx] at address 0x%08lx\n", + (unsigned long)stat, (unsigned long)addr); + *addr = BANK_CMD_CLR_STAT; + retval = 3; + } + +done: + /* reset to read mode */ + *addr = BANK_CMD_RST; + + return (retval); +} + +/*----------------------------------------------------------------------- + */ + +unsigned long +flash_init (void) +{ + int i; + + /* Init: no FLASHes known */ + for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + bank_probe (&flash_info[0], (bank_addr_t)CONFIG_SYS_FLASH_BASE); + + /* + * protect monitor and environment sectors + */ + +#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE + (void)flash_protect (FLAG_PROTECT_SET, + CONFIG_SYS_MONITOR_BASE, + CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, + &flash_info[0]); +#endif + +#if defined(CONFIG_SYS_FLASH_ENV_ADDR) + (void)flash_protect (FLAG_PROTECT_SET, + CONFIG_SYS_FLASH_ENV_ADDR, +#if defined(CONFIG_SYS_FLASH_ENV_BUF) + CONFIG_SYS_FLASH_ENV_ADDR + CONFIG_SYS_FLASH_ENV_BUF - 1, +#else + CONFIG_SYS_FLASH_ENV_ADDR + CONFIG_SYS_FLASH_ENV_SIZE - 1, +#endif + &flash_info[0]); +#endif + + return flash_info[0].size; +} + +/*----------------------------------------------------------------------- + */ +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 & FLASH_VENDMASK) { + case FLASH_MAN_INTEL: printf ("INTEL "); break; + default: printf ("Unknown Vendor "); break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_28F320J5: printf ("28F320J5 (32 Mbit, 2 x 16bit)\n"); + break; + case FLASH_28F640J5: printf ("28F640J5 (64 Mbit, 2 x 16bit)\n"); + break; + case FLASH_28F320J3A: printf ("28F320J3A (32 Mbit, 2 x 16bit)\n"); + break; + case FLASH_28F640J3A: printf ("28F640J3A (64 Mbit, 2 x 16bit)\n"); + break; + case FLASH_28F128J3A: printf ("28F320J3A (128 Mbit, 2 x 16bit)\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! + */ + +/*----------------------------------------------------------------------- + */ + +int +flash_erase (flash_info_t *info, int s_first, int s_last) +{ + int prot, sect, haderr; + ulong start, now, last; + int rcode = 0; + +#ifdef FLASH_DEBUG + printf ("\nflash_erase: erase %d sectors (%d to %d incl.) from\n" + " Bank # %d: ", s_last - s_first + 1, s_first, s_last, + (info - flash_info) + 1); + flash_print_info (info); +#endif + + 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 sector%s will not be erased\n", + prot, (prot > 1 ? "s" : "")); + } + + start = get_timer (0); + last = 0; + haderr = 0; + + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + ulong estart; + int sectdone; + + bank_erase_init (info, sect); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + + estart = get_timer (start); + + do { + now = get_timer (start); + + if (now - estart > CONFIG_SYS_FLASH_ERASE_TOUT) { + printf ("Timeout (sect %d)\n", sect); + haderr = 1; + rcode = 1; + break; + } + +#ifndef FLASH_DEBUG + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc ('.'); + last = now; + } +#endif + + sectdone = bank_erase_poll (info, sect); + + if (sectdone < 0) { + haderr = 1; + rcode = 1; + break; + } + + } while (!sectdone); + + if (haderr) + break; + } + } + + if (haderr > 0) + printf (" failed\n"); + else + printf (" done\n"); + + /* reset to read mode */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + bank_reset (info, sect); + } + } + return rcode; +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + * 3 - Program failed + */ +static int +write_word (flash_info_t *info, ulong dest, ulong data) +{ + /* Check if Flash is (sufficiently) erased */ + if ((*(ulong *)dest & data) != data) + return (2); + + return (bank_write_word ((bank_addr_t)dest, (bank_word_t)data)); +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + * 3 - Program failed + */ + +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)); +} + +/*----------------------------------------------------------------------- + */ |