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Diffstat (limited to 'board/adderII/flash.c')
| -rw-r--r-- | board/adderII/flash.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/board/adderII/flash.c b/board/adderII/flash.c new file mode 100644 index 0000000..77ab4f1 --- /dev/null +++ b/board/adderII/flash.c @@ -0,0 +1,501 @@ +/* + * (C) Copyright 2000-2003 + * 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 + */ +/****************************************************************************** +** Notes: AM29LV320DB - 90EI ( 32 Mbit device ) +** Sectors - Eight 8 Kb sector +** - Sixty three 64 Kb sector +** Bottom boot sector +******************************************************************************/ +#include <common.h> +#include <mpc8xx.h> + + +/****************************************************************************** +** Defines +******************************************************************************/ +#ifdef CONFIG_ADDERII + +#define ADDR0 0x0555 +#define ADDR1 0x02AA +#define FLASH_WORD_SIZE unsigned short + +#endif + +#if defined( CFG_ENV_IS_IN_FLASH ) +# ifndef CFG_ENV_ADDR +# define CFG_ENV_ADDR ( CFG_FLASH_BASE + CFG_ENV_OFFSET ) +# endif +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif +# ifndef CFG_ENV_SECT_SIZE +# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE +# endif +#endif + +/****************************************************************************** +** Global Parameters +******************************************************************************/ +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + +/****************************************************************************** +** Function Prototypes +******************************************************************************/ +static ulong flash_get_size( vu_long *addr, flash_info_t *info ); + +static int write_word( flash_info_t *info, ulong dest, ulong data ); + +static void flash_get_offsets( ulong base, flash_info_t *info ); + +int wait_for_DQ7( flash_info_t *info, int sect ); + +/****************************************************************************** +** Function : flash_init +** Param : void +** Notes : Initializes the Flash Chip +******************************************************************************/ +ulong flash_init (void) +{ + ulong size_b0 = -1; + int i; + volatile immap_t *immap = (immap_t *) CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + + /* Set Flash to unknown */ + for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* Get the Flash Bank Size */ + + size_b0 = flash_get_size ((vu_long *) (CFG_FLASH_BASE), + &flash_info[0]); + + if (flash_info[0].flash_id == FLASH_UNKNOWN) { + printf ("## UNKNOWN Flash on Bank 0 - Size = 0x%08lx = %ldMB\n", + size_b0, size_b0 >> 20); + } + + /* Remap Flash according to size detected */ + memctl->memc_or0 = 0xFF800774; + memctl->memc_br0 = CFG_BR0_PRELIM; + + /* Setup Flash Sector Offsets */ + + flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); + + /* Monitor Protection ON - default */ + +#if ( CFG_MONITOR_BASE >= CFG_FLASH_BASE ) + flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE, + (CFG_MONITOR_BASE + monitor_flash_len - 1), + &flash_info[0]); +#endif + + /* Protect Environment Variables */ +#ifdef CFG_ENV_IS_IN_FLASH + flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR, + (CFG_ENV_ADDR + CFG_ENV_SIZE - 1), &flash_info[0]); +#endif + + return size_b0; +} + +/****************************************************************************** +** Function : flash_get_offsets +** Param : ulong base, flash_into_t *info +** Notes : +******************************************************************************/ +static void flash_get_offsets (ulong base, flash_info_t * info) +{ + return; +} + + +/****************************************************************************** +** Function : flash_print_info +** Param : flash_info_t +** Notes : +******************************************************************************/ +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_AMD: + printf ("AMD "); + break; + case FLASH_MAN_FUJ: + printf ("FUJITSU "); + break; + case FLASH_MAN_BM: + printf ("BRIGHT MICRO "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM320B: + printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM320T: + printf ("AM29LV320T (32 Mbit, top boot sector)\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; +} + +/****************************************************************************** +** Function : flash_get_size +** Param : vu_long *addr, flash_info_t *info +** Notes : +******************************************************************************/ +static ulong flash_get_size (vu_long * addr, flash_info_t * info) +{ + short i; + FLASH_WORD_SIZE manu_id, dev_id; + ulong base = (ulong) addr; + volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr; + + /* Write Auto Select Command and read Manufacturer's ID and Dev ID */ + + addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA; + addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555; + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090; + + manu_id = addr2[0]; + + switch (manu_id) { + case (FLASH_WORD_SIZE) AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + break; + } + + /* Read Device Id */ + dev_id = addr2[1]; + + switch (dev_id) { + case (FLASH_WORD_SIZE) AMD_ID_LV320B: + info->flash_id += FLASH_AM320B; + info->sector_count = 71; /* 8 - boot sec + 63 normal */ + info->size = 0x400000; /* 4MByte */ + break; + + default: + info->flash_id = FLASH_UNKNOWN; + break; + } + + /* Set up sector start Addresses */ + + if (info->flash_id & FLASH_BTYPE) { + /* set sector offsets for bottom boot block + ** Eight 8 Kb Boot sectors + ** Sixty Three 64Kb sectors + */ + for (i = 0; i < 8; i++) { + info->start[i] = base + (i * 0x00002000); + } + for (i = 8; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00010000) - 0x00070000; + } + } + + /* Reset To read mode */ + + if (info->flash_id != FLASH_UNKNOWN) { + addr = (ulong *) info->start[0]; + *addr = 0xF0F0F0F0; + } + return (info->size); +} + +/******************************************************************************* +** Function : flash_erase +** Param : flash_info_t *info, int s_first, int s_last +** Notes : +******************************************************************************/ +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]); + volatile FLASH_WORD_SIZE *addr2; + int flag, prot, sect, l_sect; + int i; + + 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; + } + + if (info->flash_id == FLASH_UNKNOWN) { + printf ("Can't erase unknown flash type - aborted\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 (); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + + if (info->protect[sect] == 0) { /* not protected */ + addr2 = (FLASH_WORD_SIZE *) (info->start[sect]); + + if ((info->flash_id & FLASH_VENDMASK) == + FLASH_MAN_SST) { + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */ + for (i = 0; i < 50; i++) + udelay (1000); /* wait 1 ms */ + } else { + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */ + } + l_sect = sect; + /* + * Wait for each sector to complete, it's more + * reliable. According to AMD Spec, you must + * issue all erase commands within a specified + * timeout. This has been seen to fail, especially + * if printf()s are included (for debug)!! + */ + wait_for_DQ7 (info, sect); + } + } + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + + /* reset to read mode */ + addr = (FLASH_WORD_SIZE *) info->start[0]; + addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ + + printf (" done\n"); + return 0; +} + +int wait_for_DQ7 (flash_info_t * info, int sect) +{ + ulong start, now, last; + volatile FLASH_WORD_SIZE *addr = + (FLASH_WORD_SIZE *) (info->start[sect]); + + start = get_timer (0); + last = start; + while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) != + (FLASH_WORD_SIZE) 0x00800080) { + if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + return -1; + } + /* show that we're waiting */ + if ((now - last) > 1000) { + putc ('.'); + last = now; + } + } + return 0; +} + + +/****************************************************************************** +** Function : write_buff +** Param : flash_info_t *info, uchar *src, ulong addr, ulong cnt +** Notes : +******************************************************************************/ +int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + ulong cp, wp, data; + int i, l, rc; + + /* get lower word aligned address */ + wp = (addr & ~3); + + /* + * 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)); +} + + +/****************************************************************************** +** Function : write_word +** Param : flash_info_t *info, ulong dest, ulong data +** Notes : +******************************************************************************/ +static int write_word (flash_info_t * info, ulong dest, ulong data) +{ + volatile FLASH_WORD_SIZE *addr2 = + (FLASH_WORD_SIZE *) (info->start[0]); + volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest; + volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data; + ulong start; + int i; + + /* Check if Flash is (sufficiently) erased */ + if ((*((volatile FLASH_WORD_SIZE *) dest) & + (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) { + return (2); + } + + for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) { + int flag; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0; + + dest2[i] = data2[i]; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* data polling for D7 */ + start = get_timer (0); + while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) != + (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) { + if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + } + + return (0); +} |