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gsm-fw/L1: fix for the DSP patch corruption bug The L1 code we got from the LoCosto fw contains a feature for DSP CPU load measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the code dealing with that feature is conditionalized as #if (DSP >= 38), but one spot was missed, and the MCU code was writing into an API word dealing with this feature. In TCS211 this DSP API word happens to be used by the DSP code patch, hence that write was corrupting the patched DSP code.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Mon, 19 Oct 2015 17:13:56 +0000
parents 5b53cad88637
children
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# This phone has 3 memory chip selects:
#
# nCS0: flash chip select 1
# nCS1: RAM chip select
# nCS3: flash chip select 2
#
# All 3 chip select lines go to the same physical IC, a RAM/flash MCP.
# We set WS=4 for all 3 here, copying what OsmocomBB does.  The access
# time listed in the datasheet is 70 ns for both RAM and flash, and per
# my math setting WS=3 *might* work, but it could be marginal, so let's
# play it safe for now.

w16 fffffb00 00A4
w16 fffffb02 00A4
w16 fffffb06 00A4

# We also need to switch the CS4/ADD22 pin from its default function
# of CS4 to the needed ADD22.

w16 fffef006 0008

# With this phone all Calypso serial access always goes through the
# CP2102 usb2serial IC inside the phone itself, which is programmed
# to support the high non-standard baud rates.  So we can safely
# switch to 812500 baud unconditionally.

baud 812500