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This is experimental for now; the capsense chip simply reports its buttons as the number keys on the keyboard (1-8). BUG=chrome-os-partner:23382 BRANCH=samus,ToT TEST=manual To test, you'll need a reworked and correctly programmed capsense module. Boot the system, and switch to VT2. Touch the capsense bar and you'll see the input appear on the console as though you were typing numbers. Note that the capsense hardware is still buggy. Refer to the bug for workarounds. Change-Id: I4c3a8b70b8197ffd538c38c59c9336383365afa7 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/185434 Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-by: Dave Parker <dparker@chromium.org>
In the most general case, the flash layout looks something like this: +---------------------+ | Reserved for EC use | +---------------------+ +---------------------+ | Vblock B | +---------------------+ | RW firmware B | +---------------------+ +---------------------+ | Vblock A | +---------------------+ | RW firmware A | +---------------------+ +---------------------+ | FMAP | +---------------------+ | Public root key | +---------------------+ | Read-only firmware | +---------------------+ BIOS firmware (and kernel) put the vblock info at the start of each image where it's easy to find. The Blizzard EC expects the firmware vector table to come first, so we have to put the vblock at the end. This means we have to know where to look for it, but that's built into the FMAP and the RO firmware anyway, so that's not an issue. The RO firmware doesn't need a vblock of course, but it does need some reserved space for vboot-related things. Using SHA256/RSA4096, the vblock is 2468 bytes (0x9a4), while the public root key is 1064 bytes (0x428) and the current FMAP is 644 bytes (0x284). If we reserve 4K at the top of each FW image, that should give us plenty of room for vboot-related stuff.