ITE: soc: it8xxx2: correct the offset of eflash signature
This change corrects the offset to 80h and also add description of flash signature. Signed-off-by: Dino Li <Dino.Li@ite.com.tw>
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2 changed files with 47 additions and 18 deletions
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@ -39,22 +39,40 @@ SECTION_FUNC(vectors, __start)
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/* Jump to __initialize */
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tail __initialize
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/**
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*-----------------------------------------------------------------------------
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* 16-bytes signature
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*-----------------------------------------------------------------------------
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/*
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* eflash signature used to enable specific function after power-on reset.
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* (HW mechanism)
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* The content of 16-bytes must be the following and at offset 0x80 of binary.
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* ----------------------------------------------------------------------------
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* 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th
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* ----------------------------------------------------------------------------
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* A5h A5h A5h A5h A5h A5h [host] [flag] 85h 12h 5Ah 5Ah AAh AAh 55h 55h
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* ----------------------------------------------------------------------------
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* [host]: A4h = enable eSPI, A5h = enable LPC
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* [flag]:
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* bit7: it must be 1b.
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* bit6: it must be 0b.
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* bit5: it must be 1b.
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* bit4: 1b = 32.768KHz is from the internal clock generator.
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* bit3: it must be 0b.
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* bit2: it must be 1b.
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* bit1: it must be 0b.
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* bit0: it must be 0b.
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*/
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.org 0x84
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## 0 1 2 3 4 5 6 7
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.byte 0xA5,0xA5,0xA5,0xA5,0xA5,0xA5,0xA5,0xB5
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## 8 9 10 11 12 13 14 15
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.byte 0x85,0x12,0x5A,0x5A,0xAA,0xAA,0x55,0x55
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/**
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*-----------------------------------------------------------------------------
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* EC firmware version
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*-----------------------------------------------------------------------------
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*/
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.byte 'I', 'T', '8', 'X', 'X', 'X', '2', '-', 'A', 'X', '-',\
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'V', '0', '.', '0', '0'
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.org 0xa4
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.org 0x80
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.balign 16
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.global eflash_sig
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eflash_sig:
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.byte 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5
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#ifdef CONFIG_ESPI
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.byte 0xA4 /* enable eSPI */
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#else
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.byte 0xA5 /* enable LPC */
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#endif
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/* flag of signature */
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#ifdef CONFIG_SOC_IT8XXX2_EXT_32K
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.byte 0xA4 /* use external 32.768 kHz oscillator */
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#else
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.byte 0xB4 /* enable internal clock generator */
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#endif
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.byte 0x85, 0x12, 0x5A, 0x5A, 0xAA, 0xAA, 0x55, 0x55
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@ -11,3 +11,14 @@ config SOC_IT8XXX2
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select ATOMIC_OPERATIONS_C
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endchoice
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choice
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prompt "Clock source for PLL reference clock"
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config SOC_IT8XXX2_INT_32K
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bool "Use the +/-2.3% internal clock generator"
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config SOC_IT8XXX2_EXT_32K
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bool "Use external 32.768 kHz clock source"
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endchoice
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