diff options
Diffstat (limited to 'board/csb226/flash.c')
-rw-r--r-- | board/csb226/flash.c | 149 |
1 files changed, 79 insertions, 70 deletions
diff --git a/board/csb226/flash.c b/board/csb226/flash.c index 0b956480fc6..0b4e2f69ba1 100644 --- a/board/csb226/flash.c +++ b/board/csb226/flash.c @@ -6,6 +6,9 @@ * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Marius Groeger <mgroeger@sysgo.de> * + * (C) Copyright 2002 + * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de> + * * See file CREDITS for list of people who contributed to this * project. * @@ -26,6 +29,7 @@ */ #include <common.h> +#include <asm/arch/pxa-regs.h> #define FLASH_BANK_SIZE 0x02000000 #define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */ @@ -33,7 +37,10 @@ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; -/*----------------------------------------------------------------------- +/** + * flash_init: - initialize data structures for flash chips + * + * @return: size of the flash */ ulong flash_init(void) @@ -41,8 +48,7 @@ ulong flash_init(void) int i, j; ulong size = 0; - for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) - { + for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { ulong flashbase = 0; flash_info[i].flash_id = (INTEL_MANUFACT & FLASH_VENDMASK) | @@ -51,8 +57,7 @@ ulong flash_init(void) flash_info[i].sector_count = CFG_MAX_FLASH_SECT; memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT); - switch (i) - { + switch (i) { case 0: flashbase = PHYS_FLASH_1; break; @@ -60,15 +65,13 @@ ulong flash_init(void) panic("configured to many flash banks!\n"); break; } - for (j = 0; j < flash_info[i].sector_count; j++) - { + for (j = 0; j < flash_info[i].sector_count; j++) { flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE; } size += flash_info[i].size; } - /* Protect monitor and environment sectors - */ + /* Protect monitor and environment sectors */ flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + _armboot_end_data - _armboot_start, @@ -82,16 +85,21 @@ ulong flash_init(void) return size; } -/*----------------------------------------------------------------------- + +/** + * flash_print_info: - print information about the flash situation + * + * @param info: */ + void flash_print_info (flash_info_t *info) { int i, j; - for (j=0; j<CFG_MAX_FLASH_BANKS; j++) - { - switch (info->flash_id & FLASH_VENDMASK) - { + for (j=0; j<CFG_MAX_FLASH_BANKS; j++) { + + switch (info->flash_id & FLASH_VENDMASK) { + case (INTEL_MANUFACT & FLASH_VENDMASK): printf("Intel: "); break; @@ -100,38 +108,35 @@ void flash_print_info (flash_info_t *info) break; } - switch (info->flash_id & FLASH_TYPEMASK) - { + switch (info->flash_id & FLASH_TYPEMASK) { + case (INTEL_ID_28F128J3 & FLASH_TYPEMASK): printf("28F128J3 (128Mbit)\n"); break; default: printf("Unknown Chip Type\n"); - goto Done; - break; + return; } 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 "); - } + 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"); info++; } - -Done: } -/*----------------------------------------------------------------------- + +/** + * flash_erase: - erase flash sectors + * */ int flash_erase (flash_info_t *info, int s_first, int s_last) @@ -146,19 +151,15 @@ int flash_erase (flash_info_t *info, int s_first, int s_last) return ERR_INVAL; } - if ((info->flash_id & FLASH_VENDMASK) != - (INTEL_MANUFACT & FLASH_VENDMASK)) { + if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) return ERR_UNKNOWN_FLASH_VENDOR; - } prot = 0; for (sect=s_first; sect<=s_last; ++sect) { - if (info->protect[sect]) { - prot++; + if (info->protect[sect]) prot++; } - } - if (prot) - return ERR_PROTECTED; + + if (prot) return ERR_PROTECTED; /* * Disable interrupts which might cause a timeout @@ -178,57 +179,63 @@ int flash_erase (flash_info_t *info, int s_first, int s_last) reset_timer_masked(); if (info->protect[sect] == 0) { /* not protected */ - /* vushort *addr = (vushort *)(info->start[sect]); */ - ushort *addr = (ushort *)(info->start[sect]); + u32 * volatile addr = (u32 * volatile)(info->start[sect]); + + /* erase sector: */ + /* The strata flashs are aligned side by side on */ + /* the data bus, so we have to write the commands */ + /* to both chips here: */ - *addr = 0x20; /* erase setup */ - *addr = 0xD0; /* erase confirm */ + *addr = 0x00200020; /* erase setup */ + *addr = 0x00D000D0; /* erase confirm */ - while ((*addr & 0x80) != 0x80) { + while ((*addr & 0x00800080) != 0x00800080) { if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { - *addr = 0xB0; /* suspend erase */ - *addr = 0xFF; /* reset to read mode */ + *addr = 0x00B000B0; /* suspend erase*/ + *addr = 0x00FF00FF; /* read mode */ rc = ERR_TIMOUT; goto outahere; } } - /* clear status register command */ - *addr = 0x50; - /* reset to read mode */ - *addr = 0xFF; + *addr = 0x00500050; /* clear status register cmd. */ + *addr = 0x00FF00FF; /* resest to read mode */ + } + printf("ok.\n"); } - if (ctrlc()) - printf("User Interrupt!\n"); + + if (ctrlc()) printf("User Interrupt!\n"); outahere: /* allow flash to settle - wait 10 ms */ udelay_masked(10000); - if (flag) - enable_interrupts(); + if (flag) enable_interrupts(); return rc; } -/*----------------------------------------------------------------------- - * Copy memory to flash + +/** + * write_word: - copy memory to flash + * + * @param info: + * @param dest: + * @param data: + * @return: */ static int write_word (flash_info_t *info, ulong dest, ushort data) { - /* vushort *addr = (vushort *)dest, val; */ ushort *addr = (ushort *)dest, val; int rc = ERR_OK; int flag; - /* Check if Flash is (sufficiently) erased - */ - if ((*addr & data) != data) - return ERR_NOT_ERASED; + /* Check if Flash is (sufficiently) erased */ + if ((*addr & data) != data) return ERR_NOT_ERASED; /* * Disable interrupts which might cause a timeout @@ -252,12 +259,10 @@ static int write_word (flash_info_t *info, ulong dest, ushort data) reset_timer_masked(); /* wait while polling the status register */ - while(((val = *addr) & 0x80) != 0x80) - { + while(((val = *addr) & 0x80) != 0x80) { if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) { rc = ERR_TIMOUT; - /* suspend program command */ - *addr = 0xB0; + *addr = 0xB0; /* suspend program command */ goto outahere; } } @@ -285,17 +290,23 @@ static int write_word (flash_info_t *info, ulong dest, ushort data) } outahere: - /* read array command */ - *addr = 0xFF; - if (flag) - enable_interrupts(); + *addr = 0xFF; /* read array command */ + if (flag) enable_interrupts(); return rc; } -/*----------------------------------------------------------------------- - * Copy memory to flash. + +/** + * write_buf: - Copy memory to flash. + * + * @param info: + * @param src: source of copy transaction + * @param addr: where to copy to + * @param cnt: number of bytes to copy + * + * @return error code */ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) @@ -344,9 +355,7 @@ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) cnt -= 2; } - if (cnt == 0) { - return ERR_OK; - } + if (cnt == 0) return ERR_OK; /* * handle unaligned tail bytes |