diff options
Diffstat (limited to 'board/siemens/pcu_e/flash.c')
| -rw-r--r-- | board/siemens/pcu_e/flash.c | 700 |
1 files changed, 700 insertions, 0 deletions
diff --git a/board/siemens/pcu_e/flash.c b/board/siemens/pcu_e/flash.c new file mode 100644 index 0000000..b8c0df7 --- /dev/null +++ b/board/siemens/pcu_e/flash.c @@ -0,0 +1,700 @@ +/* + * (C) Copyright 2001 + * 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 + */ + +#include <common.h> +#include <mpc8xx.h> + +#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 + +/*---------------------------------------------------------------------*/ +#undef DEBUG_FLASH + +#ifdef DEBUG_FLASH +#define DEBUGF(fmt,args...) printf(fmt ,##args) +#else +#define DEBUGF(fmt,args...) +#endif +/*---------------------------------------------------------------------*/ + + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size (vu_long *addr, flash_info_t *info); +static int write_data (flash_info_t *info, ulong dest, ulong data); +static void flash_get_offsets (ulong base, flash_info_t *info); + +/*----------------------------------------------------------------------- + * + * The PCU E uses an address map where flash banks are aligned top + * down, so that the "first" flash bank ends at top of memory, and + * the monitor entry point is at address (0xFFF00100). The second + * flash bank is mapped immediately below bank 0. + * + * This is NOT in conformance to the "official" memory map! + * + */ + +#define PCU_MONITOR_BASE ( (flash_info[0].start[0] + flash_info[0].size - 1) \ + - (0xFFFFFFFF - CFG_MONITOR_BASE) ) + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init (void) +{ + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + unsigned long base, size_b0, size_b1; + int i; + + /* Init: no FLASHes known */ + for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* Static FLASH Bank configuration here - FIXME XXX */ + + /* + * Warning: + * + * Since the PCU E memory map assigns flash banks top down, + * we swap the numbering later if both banks are equipped, + * so they look like a contiguous area of memory. + */ + DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM); + + size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); + + if (flash_info[0].flash_id == FLASH_UNKNOWN) { + printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", + size_b0, size_b0<<20); + } + + DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE6_PRELIM); + size_b1 = flash_get_size((vu_long *)FLASH_BASE6_PRELIM, &flash_info[1]); + + DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n", size_b0, size_b1); + + if (size_b1 > size_b0) { + printf ("## ERROR: " + "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n", + size_b1, size_b1<<20, + size_b0, size_b0<<20 + ); + flash_info[0].flash_id = FLASH_UNKNOWN; + flash_info[1].flash_id = FLASH_UNKNOWN; + flash_info[0].sector_count = -1; + flash_info[1].sector_count = -1; + flash_info[0].size = 0; + flash_info[1].size = 0; + return (0); + } + + DEBUGF ("## Before remap: " + "BR0: 0x%08x OR0: 0x%08x " + "BR6: 0x%08x OR6: 0x%08x\n", + memctl->memc_br0, memctl->memc_or0, + memctl->memc_br6, memctl->memc_or6); + + /* Remap FLASH according to real size */ + base = 0 - size_b0; + memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); + memctl->memc_br0 = (base & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V; + + DEBUGF("## BR0: 0x%08x OR0: 0x%08x\n", + memctl->memc_br0, memctl->memc_or0); + + /* Re-do sizing to get full correct info */ + size_b0 = flash_get_size((vu_long *)base, &flash_info[0]); + base = 0 - size_b0; + + flash_info[0].size = size_b0; + + flash_get_offsets (base, &flash_info[0]); + + /* monitor protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + PCU_MONITOR_BASE, + PCU_MONITOR_BASE+CFG_MONITOR_LEN-1, + &flash_info[0]); + +#ifdef CFG_ENV_IS_IN_FLASH + /* ENV protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, + &flash_info[0]); +#endif + + if (size_b1) { + flash_info_t tmp_info; + + memctl->memc_or6 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000); + memctl->memc_br6 = ((base - size_b1) & BR_BA_MSK) | + BR_PS_16 | BR_MS_GPCM | BR_V; + + DEBUGF("## New BR6: 0x%08x OR6: 0x%08x\n", + memctl->memc_br6, memctl->memc_or6); + + /* Re-do sizing to get full correct info */ + size_b1 = flash_get_size((vu_long *)(base - size_b1), + &flash_info[1]); + base -= size_b1; + + flash_get_offsets (base, &flash_info[1]); + + flash_info[1].size = size_b1; + +#ifdef CFG_ENV_IS_IN_FLASH + /* ENV protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, + &flash_info[1]); +#endif + /* + * Swap bank numbers so that addresses are in ascending order + */ + tmp_info = flash_info[0]; + flash_info[0] = flash_info[1]; + flash_info[1] = tmp_info; + } else { + memctl->memc_br1 = 0; /* invalidate bank */ + + flash_info[1].flash_id = FLASH_UNKNOWN; + flash_info[1].sector_count = -1; + } + + + DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1); + + return (size_b0 + size_b1); +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets (ulong base, flash_info_t *info) +{ + int i; + short n; + + if (info->flash_id == FLASH_UNKNOWN) { + return; + } + + if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD) { + return; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AMDL322T: + case FLASH_AMDL323T: + case FLASH_AMDL324T: + /* set sector offsets for top boot block type */ + + base += info->size; + i = info->sector_count; + for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */ + base -= 8 << 10; + --i; + info->start[i] = base; + } + while (i > 0) { /* 64k regular sectors */ + base -= 64 << 10; + --i; + info->start[i] = base; + } + return; + case FLASH_AMDL322B: + case FLASH_AMDL323B: + case FLASH_AMDL324B: + /* set sector offsets for bottom boot block type */ + for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */ + info->start[i] = base; + base += 8 << 10; + } + while (base < info->size) { /* 64k regular sectors */ + info->start[i] = base; + base += 64 << 10; + ++i; + } + return; + case FLASH_AMDL640: + /* set sector offsets for dual boot block type */ + for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */ + info->start[i] = base; + base += 8 << 10; + } + n = info->sector_count - 8; + while (i < n) { /* 64k regular sectors */ + info->start[i] = base; + base += 64 << 10; + ++i; + } + while (i < info->sector_count) { /* 8 x 8k boot sectors */ + info->start[i] = base; + base += 8 << 10; + ++i; + } + return; + default: + return; + } + /* NOTREACHED */ +} + +/*----------------------------------------------------------------------- + */ +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; + default: printf ("Unknown Vendor "); break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AMDL322B: printf ("AM29DL322B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AMDL322T: printf ("AM29DL322T (32 Mbit, top boot sector)\n"); + break; + case FLASH_AMDL323B: printf ("AM29DL323B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AMDL323T: printf ("AM29DL323T (32 Mbit, top boot sector)\n"); + break; + case FLASH_AMDL324B: printf ("AM29DL324B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AMDL324T: printf ("AM29DL324T (32 Mbit, top boot sector)\n"); + break; + case FLASH_AMDL640: printf ("AM29DL640D (64 Mbit, dual boot sector)\n"); + break; + default: printf ("Unknown Chip Type 0x%lX\n", + info->flash_id); + 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! + */ + +static ulong flash_get_size (vu_long *addr, flash_info_t *info) +{ + short i; + ushort value; + vu_short *saddr = (vu_short *)addr; + + /* Write auto select command: read Manufacturer ID */ + saddr[0x0555] = 0x00AA; + saddr[0x02AA] = 0x0055; + saddr[0x0555] = 0x0090; + + value = saddr[0]; + + DEBUGF("Manuf. ID @ 0x%08lx: 0x%04x\n", (ulong)addr, value); + + switch (value) { + case (AMD_MANUFACT & 0xFFFF): + info->flash_id = FLASH_MAN_AMD; + break; + case (FUJ_MANUFACT & 0xFFFF): + info->flash_id = FLASH_MAN_FUJ; + break; + default: + DEBUGF("Unknown Manufacturer ID\n"); + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + value = saddr[1]; /* device ID */ + + DEBUGF("Device ID @ 0x%08lx: 0x%04x\n", (ulong)(&addr[1]), value); + + switch (value) { + + case (AMD_ID_DL322T & 0xFFFF): + info->flash_id += FLASH_AMDL322T; + info->sector_count = 71; + info->size = 0x00400000; + break; /* => 8 MB */ + + case (AMD_ID_DL322B & 0xFFFF): + info->flash_id += FLASH_AMDL322B; + info->sector_count = 71; + info->size = 0x00400000; + break; /* => 8 MB */ + + case (AMD_ID_DL323T & 0xFFFF): + info->flash_id += FLASH_AMDL323T; + info->sector_count = 71; + info->size = 0x00400000; + break; /* => 8 MB */ + + case (AMD_ID_DL323B & 0xFFFF): + info->flash_id += FLASH_AMDL323B; + info->sector_count = 71; + info->size = 0x00400000; + break; /* => 8 MB */ + + case (AMD_ID_DL324T & 0xFFFF): + info->flash_id += FLASH_AMDL324T; + info->sector_count = 71; + info->size = 0x00400000; + break; /* => 8 MB */ + + case (AMD_ID_DL324B & 0xFFFF): + info->flash_id += FLASH_AMDL324B; + info->sector_count = 71; + info->size = 0x00400000; + break; /* => 8 MB */ + case (AMD_ID_DL640 & 0xFFFF): + info->flash_id += FLASH_AMDL640; + info->sector_count = 142; + info->size = 0x00800000; + break; + default: + DEBUGF("Unknown Device ID\n"); + info->flash_id = FLASH_UNKNOWN; + return (0); /* => no or unknown flash */ + + } + + flash_get_offsets ((ulong)addr, info); + + /* check for protected sectors */ + for (i = 0; i < info->sector_count; i++) { +#if 0 + /* read sector protection at sector address, (A7 .. A0) = 0x02 */ + /* D0 = 1 if protected */ + saddr = (vu_short *)(info->start[i]); + info->protect[i] = saddr[2] & 1; +#else + info->protect[i] =0; +#endif + } + + if (info->sector_count > CFG_MAX_FLASH_SECT) { + printf ("** ERROR: sector count %d > max (%d) **\n", + info->sector_count, CFG_MAX_FLASH_SECT); + info->sector_count = CFG_MAX_FLASH_SECT; + } + + saddr = (vu_short *)info->start[0]; + *saddr = 0x00F0; /* restore read mode */ + + return (info->size); +} + + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + vu_short *addr = (vu_short*)(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; + } + + if ((info->flash_id == FLASH_UNKNOWN) || + (info->flash_id > FLASH_AMD_COMP)) { + printf ("Can't erase unknown flash type %08lx - aborted\n", + info->flash_id); + 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] = 0x00AA; + addr[0x02AA] = 0x0055; + addr[0x0555] = 0x0080; + addr[0x0555] = 0x00AA; + addr[0x02AA] = 0x0055; + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect<=s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + addr = (vu_short*)(info->start[sect]); + addr[0] = 0x0030; + 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_short*)(info->start[l_sect]); + while ((addr[0] & 0x0080) != 0x0080) { + 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 */ + putc ('.'); + last = now; + } + } + +DONE: + /* reset to read mode */ + addr = (vu_short *)info->start[0]; + addr[0] = 0x00F0; /* reset bank */ + + printf (" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ + +#define FLASH_WIDTH 2 /* flash bus width in bytes */ + +int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong cp, wp, data; + int i, l, rc; + + wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) { + data = (data << 8) | *src++; + --cnt; + ++cp; + } + for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + if ((rc = write_data(info, wp, data)) != 0) { + return (rc); + } + wp += FLASH_WIDTH; + } + + /* + * handle FLASH_WIDTH aligned part + */ + while (cnt >= FLASH_WIDTH) { + data = 0; + for (i=0; i<FLASH_WIDTH; ++i) { + data = (data << 8) | *src++; + } + if ((rc = write_data(info, wp, data)) != 0) { + return (rc); + } + wp += FLASH_WIDTH; + cnt -= FLASH_WIDTH; + } + + if (cnt == 0) { + return (0); + } + + /* + * handle unaligned tail bytes + */ + data = 0; + for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) { + data = (data << 8) | *src++; + --cnt; + } + for (; i<FLASH_WIDTH; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + return (write_data(info, wp, data)); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_data (flash_info_t *info, ulong dest, ulong data) +{ + vu_short *addr = (vu_short*)(info->start[0]); + vu_short *sdest = (vu_short *)dest; + ushort sdata = (ushort)data; + ushort sval; + ulong start, passed; + int flag, rc; + + /* Check if Flash is (sufficiently) erased */ + if ((*sdest & sdata) != sdata) { + return (2); + } + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + addr[0x0555] = 0x00AA; + addr[0x02AA] = 0x0055; + addr[0x0555] = 0x00A0; + +#ifdef WORKAROUND_FOR_BROKEN_HARDWARE + /* work around the timeout bugs */ + udelay(20); +#endif + + *sdest = sdata; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + rc = 0; + /* data polling for D7 */ + start = get_timer (0); + + for (passed=0; passed < CFG_FLASH_WRITE_TOUT; passed=get_timer(start)) { + + sval = *sdest; + + if ((sval & 0x0080) == (sdata & 0x0080)) + break; + + if ((sval & 0x0020) == 0) /* DQ5: Timeout? */ + continue; + + sval = *sdest; + + if ((sval & 0x0080) != (sdata & 0x0080)) + rc = 1; + + break; + } + + if (rc) { + DEBUGF ("Program cycle failed @ addr 0x%08lX: val %04X data %04X\n", + dest, sval, sdata); + } + + if (passed >= CFG_FLASH_WRITE_TOUT) { + DEBUGF ("Timeout @ addr 0x%08lX: val %04X data %04X\n", + dest, sval, sdata); + rc = 1; + } + + /* reset to read mode */ + addr = (vu_short *)info->start[0]; + addr[0] = 0x00F0; /* reset bank */ + + return (rc); +} + +/*----------------------------------------------------------------------- + */ |