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annotate loadtools/scripts/compal.init @ 505:7bf0d909c87e

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fc-loadtool flash ID check: change of reset after the check logic This change only affects those flash configurations that have ID checks enabled. The logic for resetting the flash after the ID check has been changed as follows: 1) If the check fails, we return without attempting to reset the flash. 2) If the check is successful, we reset the flash using the configured method (could be AMD or Intel or Intel W30) instead of always doing an AMD flash reset as the original code did.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 27 May 2019 19:58:01 +0000
parents ac48ed111d6a
children b0f9d38bfd9e
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ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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1 # Set WS=3 for both nCS0 and nCS1. This configuration is used by all official
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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2 # C11x, C139/140 and SE J100 firmwares that have been examined, i.e., by the
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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3 # official firmwares for all Compal models to which this init script applies.
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ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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8 # On most targets we use the alternate nCS0 mapping at 0x03000000 to access
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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9 # the full flash bank even though the boot ROM is mapped at 0, overlapping
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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10 # the first 8 KiB of flash. However, the Calypso chip (all versions we work
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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11 # with) has a little design bug in this part of the silicon: the alternate
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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12 # nCS0 mapping at 0x03000000 works only when the debug visibility bit in the
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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13 # API-RHEA control register (bit 6 in the FFFF:FB0E register) is set, and
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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14 # does not work otherwise. This bit is initially set as the Calypso comes
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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15 # out of reset, and on most platforms we gain loadtool access via the boot ROM,
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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16 # hence the problem does not occur - but on these Compal targets we gain
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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17 # loadtool access either through Compal's bootloader or via tfc139, and in
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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18 # both cases Compal's fw (either the full fw or the bootloader part) has
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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19 # already set the register in question to the runtime operational value of
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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20 # 0x2A (unchanged from TI's TCS211 reference fw), with the debug visibility
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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21 # bit cleared, hence the 0x03000000 flash mapping no longer works.
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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22 #
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23 # We could write into the FFFF:FB0E register here, restore the Calypso power-up
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parents: 0
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24 # state and use the 0x03000000 mapping like on other platforms, but the problem
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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25 # of the mapping not working as expected was first encountered in 2014 when we
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
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parents: 0
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26 # started working on Compal targets, whereas the root cause described above was
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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27 # only discovered in 2019. For now we are keeping the original workaround from
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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28 # 2014: we set the FFFF:FB10 register to map the flash (not the boot ROM)
ac48ed111d6a loadtools/scripts/compal.init: updated comments for new understanding
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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29 # to address 0, and use that "main" mapping instead of the alternate one.
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