Fix BCM4500 full boot: strip init block length prefixes, handle gateway poll

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Two root causes prevented BCM4500 init block writes from completing:

1. Init block data arrays included length prefix bytes from the stock
   firmware's XDATA format (17-byte blocks at code:0x0B4F). The stock
   firmware reads byte 0 as length and writes bytes 1..N to A7.
   Blocks 0 and 1 had the length prefix (0x06, 0x07) as the first
   data byte, corrupting the DSP's indirect register FIFO.

2. The BCM3440 gateway's A8 register does not clear bit 0 after
   indirect write commands (0x03), even though the BCM4500 processes
   them successfully (confirmed via direct address 0x08 where A8
   transitions from 0x03 → 0x02). bcm_poll_ready() now treats
   gateway timeout as success with a settling delay.

Boot now completes reliably in ~0.96s through all stages:
GPIO → power → reset → PLL/DSP load → init blocks 0,1,2 → 0xFF.

...

This commit is contained in:

Ryan Malloy 2026-02-19 22:08:44 -07:00

parent 7f1e0cf0d7

commit 29df688f28

1 changed files with 2664 additions and 2256 deletions

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