127 lines
2.5 KiB
NASM
127 lines
2.5 KiB
NASM
; ------------------------------------------------------------------------------
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; | Flash ROM Read Serial Number |
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; | Copyright (c) 2016 APOLLO TEAM |
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; | Christoph Höhne, modifications by Henryk Richter |
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; ------------------------------------------------------------------------------
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FLASH_ID EQU $14 ;cmd=0xAB
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FLASH_ADR_W EQU $00DFF1F8
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FLASH_ADR_R EQU $00DFF1FA
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FLASH_MAGIC EQU $42420000
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FLASH_CS EQU $1
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FLASH_CSn EQU $0
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FLASH_CLK EQU $2
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FLASH_CLKn EQU $0
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FLASH_MOSI EQU $4
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FLASH_MOSIn EQU $0
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FLASH_MISO EQU $1
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FLASH_MISOn EQU $0
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;VAMPIRE_MAGIC EQU ascii "Vamp"
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VAMPIRE_MAGIC EQU $56616D70
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xdef _vampire_UUID
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;-------- Get 64 Bit unique ID --------------------
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; Input
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; A1 - pointer to 8 Bytes storage
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; Output
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; D0 = 0 - failure
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; >0 - success
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_vampire_UUID:
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movem.l d1-a6,-(sp) ;lazy register store
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bsr flashreadid
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cmpi.b #FLASH_ID,d0
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bne.s error$
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bsr flashuniqueid
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move.l d0,(a1)
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move.l d1,4(a1)
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moveq #1,d0
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bra.s return$
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error$:
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moveq #0,d0
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return$
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movem.l (sp)+,d1-a6
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rts
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; uint8_t flashreadid(void)
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; D0
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flashreadid:
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move.b #$AB,d1
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bsr flashbyte
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bsr flashbyte
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bsr flashbyte
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bsr flashbyte
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bsr flashbyte
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bsr flashdeselect
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rts
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; uint64_t flashuniqueid(void)
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; D0/D1
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flashuniqueid:
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move.b #$5A,d1
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bsr flashbyte
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clr d1
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bsr flashbyte
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clr d1
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bsr flashbyte
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move.b #$F8,d1
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bsr flashbyte
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bsr flashbyte
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bsr flashbyte
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lsl.l #8,d1
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bsr flashbyte
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lsl.l #8,d1
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bsr flashbyte
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lsl.l #8,d1
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bsr flashbyte
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move.l d1,d3
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bsr flashbyte
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lsl.l #8,d1
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bsr flashbyte
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lsl.l #8,d1
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bsr flashbyte
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lsl.l #8,d1
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bsr flashbyte
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move.l d3,d0
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bsr flashdeselect
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rts
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; void flashselect(void)
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;flashselect:
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; move.l #FLASH_MAGIC+FLASH_CSn+FLASH_CLKn,d0
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; move.l d0,FLASH_ADR_W
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; rts
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; void flashdeselect(void)
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flashdeselect:
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move.l #FLASH_MAGIC+FLASH_CS+FLASH_CLK,d3
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move.l d3,FLASH_ADR_W
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rts
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; uint8_t flashbyte(uint8_t)
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; D0 D1
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flashbyte:
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moveq #7,d2
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;bsr flashselect
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move.l #FLASH_MAGIC+FLASH_CSn+FLASH_CLKn,d0
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move.l d0,FLASH_ADR_W
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flashbyteloop:
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lsl.b #1,d1
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scs.b d0
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andi.w #FLASH_MOSI,d0
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move.l d0,FLASH_ADR_W
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ori.w #FLASH_CLK,d0
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move.l d0,FLASH_ADR_W
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or.w FLASH_ADR_R,d1
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dbra d2,flashbyteloop
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move.b d1,d0
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rts
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