diff options
Diffstat (limited to 'board/sandburst/common/flash.c')
| -rw-r--r-- | board/sandburst/common/flash.c | 493 |
1 files changed, 0 insertions, 493 deletions
diff --git a/board/sandburst/common/flash.c b/board/sandburst/common/flash.c deleted file mode 100644 index ad046be..0000000 --- a/board/sandburst/common/flash.c +++ /dev/null @@ -1,493 +0,0 @@ -/* - * (C) Copyright 2002-2005 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * (C) Copyright 2002 Jun Gu <jung@artesyncp.com> - * Add support for Am29F016D and dynamic switch setting. - * - * SPDX-License-Identifier: GPL-2.0+ - */ -/* - * Ported from Ebony flash support - * Travis B. Sawyer - * Sandburst Corporation - */ -#include <common.h> -#include <asm/ppc4xx.h> -#include <asm/processor.h> - - -#undef DEBUG -#ifdef DEBUG -#define DEBUGF(x...) printf(x) -#else -#define DEBUGF(x...) -#endif /* DEBUG */ - - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ - -static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = { - {0xfff80000} /* Boot Flash */ -}; - -/*----------------------------------------------------------------------- - * Functions - */ -static ulong flash_get_size (vu_long *addr, flash_info_t *info); -static int write_word (flash_info_t *info, ulong dest, ulong data); - - -#define ADDR0 0x5555 -#define ADDR1 0x2aaa -#define FLASH_WORD_SIZE unsigned char - - -/*----------------------------------------------------------------------- - */ - -unsigned long flash_init (void) -{ - unsigned long total_b = 0; - unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS]; - unsigned short index = 0; - int i; - - - DEBUGF("\n"); - DEBUGF("FLASH: Index: %d\n", index); - - /* Init: no FLASHes known */ - for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { - flash_info[i].flash_id = FLASH_UNKNOWN; - flash_info[i].sector_count = -1; - flash_info[i].size = 0; - - /* check whether the address is 0 */ - if (flash_addr_table[index][i] == 0) { - continue; - } - - /* call flash_get_size() to initialize sector address */ - size_b[i] = flash_get_size( - (vu_long *)flash_addr_table[index][i], &flash_info[i]); - flash_info[i].size = size_b[i]; - if (flash_info[i].flash_id == FLASH_UNKNOWN) { - printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", - i, size_b[i], size_b[i]<<20); - flash_info[i].sector_count = -1; - flash_info[i].size = 0; - } - - total_b += flash_info[i].size; - } - - return total_b; -} - - -/*----------------------------------------------------------------------- - */ -void flash_print_info (flash_info_t *info) -{ - int i; - int k; - int size; - int erased; - volatile unsigned long *flash; - - 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; - default: printf ("Unknown Vendor "); break; - } - - switch (info->flash_id & FLASH_TYPEMASK) { - case FLASH_AM040: printf ("AM29F040 (512 Kbit, uniform sector size)\n"); - break; - default: printf ("Unknown Chip Type\n"); - break; - } - - printf (" Size: %ld KB in %d Sectors\n", - info->size >> 10, info->sector_count); - - printf (" Sector Start Addresses:"); - for (i=0; i<info->sector_count; ++i) { - /* - * Check if whole sector is erased - */ - if (i != (info->sector_count-1)) - size = info->start[i+1] - info->start[i]; - else - size = info->start[0] + info->size - info->start[i]; - erased = 1; - flash = (volatile unsigned long *)info->start[i]; - size = size >> 2; /* divide by 4 for longword access */ - for (k=0; k<size; k++) - { - if (*flash++ != 0xffffffff) - { - erased = 0; - break; - } - } - - if ((i % 5) == 0) - printf ("\n "); - printf (" %08lX%s%s", - info->start[i], - erased ? " E" : " ", - info->protect[i] ? "RO " : " " - ); - } - printf ("\n"); - return; - } - -/*----------------------------------------------------------------------- - */ - - -/*----------------------------------------------------------------------- - */ - -/* - * The following code cannot be run from FLASH! - */ -static ulong flash_get_size (vu_long *addr, flash_info_t *info) -{ - short i; - FLASH_WORD_SIZE value; - ulong base = (ulong)addr; - volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr; - - DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr ); - - /* Write auto select command: read Manufacturer ID */ - udelay(10000); - addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; - udelay(1000); - addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055; - udelay(1000); - addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090; - udelay(1000); - - value = addr2[0]; - - DEBUGF("FLASH MANUFACT: %x\n", value); - - switch (value) { - 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; - return (0); /* no or unknown flash */ - } - - value = addr2[1]; /* device ID */ - - DEBUGF("\nFLASH DEVICEID: %x\n", value); - - switch (value) { - case (FLASH_WORD_SIZE)AMD_ID_LV040B: - info->flash_id += FLASH_AM040; - info->sector_count = 8; - info->size = 0x00080000; /* => 512 kb */ - break; - - default: - info->flash_id = FLASH_UNKNOWN; - return (0); /* => no or unknown flash */ - - } - - /* set up sector start address table */ - if (info->flash_id == FLASH_AM040) { - for (i = 0; i < info->sector_count; i++) - info->start[i] = base + (i * 0x00010000); - } else { - if (info->flash_id & FLASH_BTYPE) { - /* set sector offsets for bottom boot block type */ - info->start[0] = base + 0x00000000; - info->start[1] = base + 0x00004000; - info->start[2] = base + 0x00006000; - info->start[3] = base + 0x00008000; - for (i = 4; i < info->sector_count; i++) { - info->start[i] = base + (i * 0x00010000) - 0x00030000; - } - } else { - /* set sector offsets for top boot block type */ - i = info->sector_count - 1; - info->start[i--] = base + info->size - 0x00004000; - info->start[i--] = base + info->size - 0x00006000; - info->start[i--] = base + info->size - 0x00008000; - for (; i >= 0; i--) { - info->start[i] = base + i * 0x00010000; - } - } - } - - /* check for protected sectors */ - for (i = 0; i < info->sector_count; i++) { - /* read sector protection at sector address, (A7 .. A0) = 0x02 */ - /* D0 = 1 if protected */ - addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]); - if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) - info->protect[i] = 0; - else - info->protect[i] = addr2[2] & 1; - } - - /* reset to return to reading data */ - addr2[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ - - /* - * Prevent writes to uninitialized FLASH. - */ - if (info->flash_id != FLASH_UNKNOWN) { - addr2 = (FLASH_WORD_SIZE *)info->start[0]; - *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ - } - - return (info->size); -} - -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)) > CONFIG_SYS_FLASH_ERASE_TOUT) { - printf ("Timeout\n"); - return -1; - } - /* show that we're waiting */ - if ((now - last) > 1000) { /* every second */ - putc ('.'); - last = now; - } - } - return 0; -} - -/*----------------------------------------------------------------------- - */ - -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; - 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"); - } - - /* 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]); - DEBUGF("Erasing sector %p\n", addr2); - - 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 */ - } - /* - * 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; -} - -/*----------------------------------------------------------------------- - * Copy memory to flash, returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ - -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)); -} - -/*----------------------------------------------------------------------- - * Write a word to Flash, returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ -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) > CONFIG_SYS_FLASH_WRITE_TOUT) { - return (1); - } - } - } - - return (0); -} |