From 98bea8aba5a1dad1abc2b1d191f873e1d45d5b50 Mon Sep 17 00:00:00 2001 From: Ollie Lho Date: Tue, 7 Dec 2004 03:15:51 +0000 Subject: SST49LF00[2,3,4] should use the same driver as 49LF008 Corresponding to flashrom svn r27 and coreboot v2 svn r1812. --- jedec.c | 37 ++++++++++++++++++++----------------- 1 file changed, 20 insertions(+), 17 deletions(-) (limited to 'jedec.c') diff --git a/jedec.c b/jedec.c index 19a233b8..0344b698 100644 --- a/jedec.c +++ b/jedec.c @@ -89,6 +89,7 @@ int erase_sector_jedec(volatile unsigned char *bios, unsigned int page) return (0); } + int erase_block_jedec(volatile unsigned char *bios, unsigned int block) { volatile unsigned char *Temp; @@ -149,43 +150,45 @@ int erase_chip_jedec(struct flashchip *flash) return (0); } -void write_page_write_jedec(volatile unsigned char *bios, unsigned char *src, - volatile unsigned char *dst, int page_size) +int write_page_write_jedec(volatile unsigned char *bios, unsigned char *src, + volatile unsigned char *dst, int page_size) { int i; /* Issue JEDEC Data Unprotect comand */ - *(volatile char *) (bios + 0x5555) = 0xAA; - *(volatile char *) (bios + 0x2AAA) = 0x55; - *(volatile char *) (bios + 0x5555) = 0xA0; + *(volatile unsigned char *) (bios + 0x5555) = 0xAA; + *(volatile unsigned char *) (bios + 0x2AAA) = 0x55; + *(volatile unsigned char *) (bios + 0x5555) = 0xA0; + /* transfer data from source to destination */ for (i = 0; i < page_size; i++) { - /* transfer data from source to destination */ + /* If the data is 0xFF, don't program it */ + if (*src == 0xFF) + continue; *dst++ = *src++; } - usleep(100); toggle_ready_jedec(dst - 1); + + return 0; } int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src, volatile unsigned char *dst) { - volatile unsigned char *Temp; - - /* transfer data from source to destination */ + /* If the data is 0xFF, don't program it */ if (*src == 0xFF) { - /* If the data is 0xFF, don't program it */ return 0; } + /* Issue JEDEC Byte Program command */ - Temp = bios + 0x5555; - *Temp = 0xAA; - Temp = bios + 0x2AAA; - *Temp = 0x55; - Temp = bios + 0x5555; - *Temp = 0xA0; + *(volatile unsigned char *) (bios + 0x5555) = 0xAA; + *(volatile unsigned char *) (bios + 0x2AAA) = 0x55; + *(volatile unsigned char *) (bios + 0x5555) = 0xA0; + + /* transfer data from source to destination */ *dst = *src; + toggle_ready_jedec(bios); return 0; -- cgit v1.2.3