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Diffstat (limited to 'board/tqc/tqm8xx/flash.c')
| -rw-r--r-- | board/tqc/tqm8xx/flash.c | 834 |
1 files changed, 834 insertions, 0 deletions
diff --git a/board/tqc/tqm8xx/flash.c b/board/tqc/tqm8xx/flash.c new file mode 100644 index 000000000..4342ebc84 --- /dev/null +++ b/board/tqc/tqm8xx/flash.c @@ -0,0 +1,834 @@ +/* + * (C) Copyright 2000-2004 + * 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 + */ + +#if 0 +#define DEBUG +#endif + +#include <common.h> +#include <mpc8xx.h> +#include <environment.h> + +#include <asm/processor.h> + +DECLARE_GLOBAL_DATA_PTR; + +#if !defined(CFG_FLASH_CFI_DRIVER) /* do not use if CFI driver is configured */ + +#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \ + && !defined(CONFIG_TQM885D) +# ifndef CFG_OR_TIMING_FLASH_AT_50MHZ +# define CFG_OR_TIMING_FLASH_AT_50MHZ (OR_ACS_DIV1 | OR_TRLX | OR_CSNT_SAM | \ + OR_SCY_2_CLK | OR_EHTR | OR_BI) +# endif +#endif /* CONFIG_TQM8xxL/M, !TQM866M, !TQM885D */ + +#ifndef CFG_ENV_ADDR +#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) +#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_word (flash_info_t *info, ulong dest, ulong data); + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init (void) +{ + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + unsigned long size_b0, size_b1; + int i; + +#ifdef CFG_OR_TIMING_FLASH_AT_50MHZ + int scy, trlx, flash_or_timing, clk_diff; + + scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4; + if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) { + trlx = OR_TRLX; + scy *= 2; + } else + trlx = 0; + + /* We assume that each 10MHz of bus clock require 1-clk SCY + * adjustment. + */ + clk_diff = (gd->bus_clk / 1000000) - 50; + + /* We need proper rounding here. This is what the "+5" and "-5" + * are here for. + */ + if (clk_diff >= 0) + scy += (clk_diff + 5) / 10; + else + scy += (clk_diff - 5) / 10; + + /* For bus frequencies above 50MHz, we want to use relaxed timing + * (OR_TRLX). + */ + if (gd->bus_clk >= 50000000) + trlx = OR_TRLX; + else + trlx = 0; + + if (trlx) + scy /= 2; + + if (scy > 0xf) + scy = 0xf; + if (scy < 1) + scy = 1; + + flash_or_timing = (scy << 4) | trlx | + (CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX | OR_SCY_MSK)); +#endif + /* 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 */ + + debug ("\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]); + + debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM); + + 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); + } + + size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]); + + debug ("## 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); + } + + debug ("## Before remap: " + "BR0: 0x%08x OR0: 0x%08x " + "BR1: 0x%08x OR1: 0x%08x\n", + memctl->memc_br0, memctl->memc_or0, + memctl->memc_br1, memctl->memc_or1); + + /* Remap FLASH according to real size */ +#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ + memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK); +#else + memctl->memc_or0 = flash_or_timing | (-size_b0 & OR_AM_MSK); +#endif + memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V; + + debug ("## 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 *)CFG_FLASH_BASE, &flash_info[0]); + +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + /* monitor protection ON by default */ + debug ("Protect monitor: %08lx ... %08lx\n", + (ulong)CFG_MONITOR_BASE, + (ulong)CFG_MONITOR_BASE + monitor_flash_len - 1); + + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE + monitor_flash_len - 1, + &flash_info[0]); +#endif + +#ifdef CFG_ENV_IS_IN_FLASH + /* ENV protection ON by default */ +# ifdef CFG_ENV_ADDR_REDUND + debug ("Protect primary environment: %08lx ... %08lx\n", + (ulong)CFG_ENV_ADDR, + (ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1); +# else + debug ("Protect environment: %08lx ... %08lx\n", + (ulong)CFG_ENV_ADDR, + (ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1); +# endif + + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1, + &flash_info[0]); +#endif + +#ifdef CFG_ENV_ADDR_REDUND + debug ("Protect redundand environment: %08lx ... %08lx\n", + (ulong)CFG_ENV_ADDR_REDUND, + (ulong)CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1); + + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR_REDUND, + CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1, + &flash_info[0]); +#endif + + if (size_b1) { +#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ + memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000); +#else + memctl->memc_or1 = flash_or_timing | (-size_b1 & 0xFFFF8000); +#endif + memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) | + BR_MS_GPCM | BR_V; + + debug ("## BR1: 0x%08x OR1: 0x%08x\n", + memctl->memc_br1, memctl->memc_or1); + + /* Re-do sizing to get full correct info */ + size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0), + &flash_info[1]); + +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + /* monitor protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+monitor_flash_len-1, + &flash_info[1]); +#endif + +#ifdef CFG_ENV_IS_IN_FLASH + /* ENV protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR+CFG_ENV_SIZE-1, + &flash_info[1]); +#endif + } else { + memctl->memc_br1 = 0; /* invalidate bank */ + + flash_info[1].flash_id = FLASH_UNKNOWN; + flash_info[1].sector_count = -1; + flash_info[1].size = 0; + + debug ("## DISABLE BR1: 0x%08x OR1: 0x%08x\n", + memctl->memc_br1, memctl->memc_or1); + } + + debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1); + + flash_info[0].size = size_b0; + flash_info[1].size = size_b1; + + return (size_b0 + size_b1); +} + +/*----------------------------------------------------------------------- + */ +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) { +#ifdef CONFIG_TQM8xxM /* mirror bit flash */ + case FLASH_AMLV128U: printf ("AM29LV128ML (128Mbit, uniform sector size)\n"); + break; + case FLASH_AMLV320U: printf ("AM29LV320ML (32Mbit, uniform sector size)\n"); + break; + case FLASH_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n"); + break; + case FLASH_AMLV320B: printf ("AM29LV320MB (32Mbit, bottom boot sect)\n"); + break; +# else /* ! TQM8xxM */ + case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); + break; + case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); + break; + case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); + break; +#endif /* TQM8xxM */ + case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); + break; + case FLASH_AMDL163B: printf ("AM29DL163B (16 Mbit, bottom boot sect)\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! + */ + +static ulong flash_get_size (vu_long *addr, flash_info_t *info) +{ + short i; + ulong value; + ulong base = (ulong)addr; + + /* Write auto select command: read Manufacturer ID */ + addr[0x0555] = 0x00AA00AA; + addr[0x02AA] = 0x00550055; + addr[0x0555] = 0x00900090; + + value = addr[0]; + + debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value); + + switch (value) { + case AMD_MANUFACT: + debug ("Manufacturer: AMD\n"); + info->flash_id = FLASH_MAN_AMD; + break; + case FUJ_MANUFACT: + debug ("Manufacturer: FUJITSU\n"); + info->flash_id = FLASH_MAN_FUJ; + break; + default: + debug ("Manufacturer: *** unknown ***\n"); + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + value = addr[1]; /* device ID */ + + debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value); + + switch (value) { +#ifdef CONFIG_TQM8xxM /* mirror bit flash */ + case AMD_ID_MIRROR: + debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n", + addr[14], addr[15]); + /* Special case for AMLV320MH/L */ + if ((addr[14] & 0x00ff00ff) == 0x001d001d && + (addr[15] & 0x00ff00ff) == 0x00000000) { + debug ("Chip: AMLV320MH/L\n"); + info->flash_id += FLASH_AMLV320U; + info->sector_count = 64; + info->size = 0x00800000; /* => 8 MB */ + break; + } + switch(addr[14]) { + case AMD_ID_LV128U_2: + if (addr[15] != AMD_ID_LV128U_3) { + debug ("Chip: AMLV128U -> unknown\n"); + info->flash_id = FLASH_UNKNOWN; + } else { + debug ("Chip: AMLV128U\n"); + info->flash_id += FLASH_AMLV128U; + info->sector_count = 256; + info->size = 0x02000000; + } + break; /* => 32 MB */ + case AMD_ID_LV640U_2: + if (addr[15] != AMD_ID_LV640U_3) { + debug ("Chip: AMLV640U -> unknown\n"); + info->flash_id = FLASH_UNKNOWN; + } else { + debug ("Chip: AMLV640U\n"); + info->flash_id += FLASH_AMLV640U; + info->sector_count = 128; + info->size = 0x01000000; + } + break; /* => 16 MB */ + case AMD_ID_LV320B_2: + if (addr[15] != AMD_ID_LV320B_3) { + debug ("Chip: AMLV320B -> unknown\n"); + info->flash_id = FLASH_UNKNOWN; + } else { + debug ("Chip: AMLV320B\n"); + info->flash_id += FLASH_AMLV320B; + info->sector_count = 71; + info->size = 0x00800000; + } + break; /* => 8 MB */ + default: + debug ("Chip: *** unknown ***\n"); + info->flash_id = FLASH_UNKNOWN; + break; + } + break; +# else /* ! TQM8xxM */ + case AMD_ID_LV400T: + info->flash_id += FLASH_AM400T; + info->sector_count = 11; + info->size = 0x00100000; + break; /* => 1 MB */ + + case AMD_ID_LV400B: + info->flash_id += FLASH_AM400B; + info->sector_count = 11; + info->size = 0x00100000; + break; /* => 1 MB */ + + case AMD_ID_LV800T: + info->flash_id += FLASH_AM800T; + info->sector_count = 19; + info->size = 0x00200000; + break; /* => 2 MB */ + + case AMD_ID_LV800B: + info->flash_id += FLASH_AM800B; + info->sector_count = 19; + info->size = 0x00200000; + break; /* => 2 MB */ + + case AMD_ID_LV320T: + info->flash_id += FLASH_AM320T; + info->sector_count = 71; + info->size = 0x00800000; + break; /* => 8 MB */ + + case AMD_ID_LV320B: + info->flash_id += FLASH_AM320B; + info->sector_count = 71; + info->size = 0x00800000; + break; /* => 8 MB */ +#endif /* TQM8xxM */ + + case AMD_ID_LV160T: + info->flash_id += FLASH_AM160T; + info->sector_count = 35; + info->size = 0x00400000; + break; /* => 4 MB */ + + case AMD_ID_LV160B: + info->flash_id += FLASH_AM160B; + info->sector_count = 35; + info->size = 0x00400000; + break; /* => 4 MB */ + + case AMD_ID_DL163B: + info->flash_id += FLASH_AMDL163B; + info->sector_count = 39; + info->size = 0x00400000; + break; /* => 4 MB */ + + default: + info->flash_id = FLASH_UNKNOWN; + return (0); /* => no or unknown flash */ + } + + /* set up sector start address table */ + switch (value) { +#ifdef CONFIG_TQM8xxM /* mirror bit flash */ + case AMD_ID_MIRROR: + switch (info->flash_id & FLASH_TYPEMASK) { + /* only known types here - no default */ + case FLASH_AMLV128U: + case FLASH_AMLV640U: + case FLASH_AMLV320U: + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + base += 0x20000; + } + break; + case FLASH_AMLV320B: + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + /* + * The first 8 sectors are 8 kB, + * all the other ones are 64 kB + */ + base += (i < 8) + ? 2 * ( 8 << 10) + : 2 * (64 << 10); + } + break; + } + break; +# else /* ! TQM8xxM */ + case AMD_ID_LV400B: + case AMD_ID_LV800B: + /* set sector offsets for bottom boot block type */ + info->start[0] = base + 0x00000000; + info->start[1] = base + 0x00008000; + info->start[2] = base + 0x0000C000; + info->start[3] = base + 0x00010000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00020000) - 0x00060000; + } + break; + case AMD_ID_LV400T: + case AMD_ID_LV800T: + /* set sector offsets for top boot block type */ + i = info->sector_count - 1; + info->start[i--] = base + info->size - 0x00008000; + info->start[i--] = base + info->size - 0x0000C000; + info->start[i--] = base + info->size - 0x00010000; + for (; i >= 0; i--) { + info->start[i] = base + i * 0x00020000; + } + break; + case AMD_ID_LV320B: + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + /* + * The first 8 sectors are 8 kB, + * all the other ones are 64 kB + */ + base += (i < 8) + ? 2 * ( 8 << 10) + : 2 * (64 << 10); + } + break; + case AMD_ID_LV320T: + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + /* + * The last 8 sectors are 8 kB, + * all the other ones are 64 kB + */ + base += (i < (info->sector_count - 8)) + ? 2 * (64 << 10) + : 2 * ( 8 << 10); + } + break; +#endif /* TQM8xxM */ + case AMD_ID_LV160B: + /* set sector offsets for bottom boot block type */ + info->start[0] = base + 0x00000000; + info->start[1] = base + 0x00008000; + info->start[2] = base + 0x0000C000; + info->start[3] = base + 0x00010000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00020000) - 0x00060000; + } + break; + case AMD_ID_LV160T: + /* set sector offsets for top boot block type */ + i = info->sector_count - 1; + info->start[i--] = base + info->size - 0x00008000; + info->start[i--] = base + info->size - 0x0000C000; + info->start[i--] = base + info->size - 0x00010000; + for (; i >= 0; i--) { + info->start[i] = base + i * 0x00020000; + } + break; + case AMD_ID_DL163B: + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + /* + * The first 8 sectors are 8 kB, + * all the other ones are 64 kB + */ + base += (i < 8) + ? 2 * ( 8 << 10) + : 2 * (64 << 10); + } + break; + default: + return (0); + break; + } + +#if 0 + /* 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 */ + addr = (volatile unsigned long *)(info->start[i]); + info->protect[i] = addr[2] & 1; + } +#endif + + /* + * Prevent writes to uninitialized FLASH. + */ + if (info->flash_id != FLASH_UNKNOWN) { + addr = (volatile unsigned long *)info->start[0]; + + *addr = 0x00F000F0; /* reset bank */ + } + + return (info->size); +} + + +/*----------------------------------------------------------------------- + */ + +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; + + debug ("flash_erase: first: %d last: %d\n", s_first, s_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] = 0x00AA00AA; + addr[0x02AA] = 0x00550055; + addr[0x0555] = 0x00800080; + addr[0x0555] = 0x00AA00AA; + addr[0x02AA] = 0x00550055; + + /* 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] = 0x00300030; + 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] & 0x00800080) != 0x00800080) { + 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 = (volatile unsigned long *)info->start[0]; + addr[0] = 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) +{ + 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] = 0x00AA00AA; + addr[0x02AA] = 0x00550055; + addr[0x0555] = 0x00A000A0; + + *((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) & 0x00800080) != (data & 0x00800080)) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + return (0); +} + +/*----------------------------------------------------------------------- + */ + +#endif /* !defined(CFG_FLASH_CFI_DRIVER) */ |