diff options
Diffstat (limited to 'board/tqc/tqm8xx/flash.c')
| -rw-r--r-- | board/tqc/tqm8xx/flash.c | 834 |
1 files changed, 0 insertions, 834 deletions
diff --git a/board/tqc/tqm8xx/flash.c b/board/tqc/tqm8xx/flash.c deleted file mode 100644 index ca35e91..0000000 --- a/board/tqc/tqm8xx/flash.c +++ /dev/null @@ -1,834 +0,0 @@ -/* - * (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(CONFIG_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 CONFIG_ENV_ADDR -#define CONFIG_ENV_ADDR (CFG_FLASH_BASE + CONFIG_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 CONFIG_ENV_IS_IN_FLASH - /* ENV protection ON by default */ -# ifdef CONFIG_ENV_ADDR_REDUND - debug ("Protect primary environment: %08lx ... %08lx\n", - (ulong)CONFIG_ENV_ADDR, - (ulong)CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1); -# else - debug ("Protect environment: %08lx ... %08lx\n", - (ulong)CONFIG_ENV_ADDR, - (ulong)CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1); -# endif - - flash_protect(FLAG_PROTECT_SET, - CONFIG_ENV_ADDR, - CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1, - &flash_info[0]); -#endif - -#ifdef CONFIG_ENV_ADDR_REDUND - debug ("Protect redundand environment: %08lx ... %08lx\n", - (ulong)CONFIG_ENV_ADDR_REDUND, - (ulong)CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1); - - flash_protect(FLAG_PROTECT_SET, - CONFIG_ENV_ADDR_REDUND, - CONFIG_ENV_ADDR_REDUND + CONFIG_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 CONFIG_ENV_IS_IN_FLASH - /* ENV protection ON by default */ - flash_protect(FLAG_PROTECT_SET, - CONFIG_ENV_ADDR, - CONFIG_ENV_ADDR+CONFIG_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(CONFIG_FLASH_CFI_DRIVER) */ |