1a4f0707bb
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2111 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
#ifndef __JEDEC_H__
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#define __JEDEC_H__ 1
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int write_byte_program_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst);
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extern int probe_jedec(struct flashchip *flash);
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extern int erase_chip_jedec(struct flashchip *flash);
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extern int write_jedec(struct flashchip *flash, uint8_t *buf);
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extern int erase_sector_jedec(volatile uint8_t *bios, unsigned int page);
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extern int erase_block_jedec(volatile uint8_t *bios, unsigned int page);
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extern int write_sector_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst,
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unsigned int page_size);
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extern __inline__ void toggle_ready_jedec(volatile uint8_t *dst)
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{
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unsigned int i = 0;
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uint8_t tmp1, tmp2;
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tmp1 = *dst & 0x40;
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while (i++ < 0xFFFFFFF) {
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tmp2 = *dst & 0x40;
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if (tmp1 == tmp2) {
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break;
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}
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tmp1 = tmp2;
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}
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}
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extern __inline__ void data_polling_jedec(volatile uint8_t *dst, uint8_t data)
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{
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unsigned int i = 0;
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uint8_t tmp;
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data &= 0x80;
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while (i++ < 0xFFFFFFF) {
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tmp = *dst & 0x80;
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if (tmp == data) {
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break;
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}
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}
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}
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extern __inline__ void unprotect_jedec(volatile uint8_t *bios)
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{
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*(volatile uint8_t *) (bios + 0x5555) = 0xAA;
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*(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *) (bios + 0x5555) = 0x80;
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*(volatile uint8_t *) (bios + 0x5555) = 0xAA;
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*(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *) (bios + 0x5555) = 0x20;
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usleep(200);
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}
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extern __inline__ void protect_jedec(volatile uint8_t *bios)
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{
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*(volatile uint8_t *) (bios + 0x5555) = 0xAA;
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*(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *) (bios + 0x5555) = 0xA0;
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usleep(200);
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}
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#endif /* !__JEDEC_H__ */
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