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Before this change, powerinfo host command supports only one target with USB charging. This change adds a common powerinfo host command and console command for TPSChrome based targets. BRANCH=None BUG=chrome-os-partner:20326 TEST=manual build and flash pit target, check console command 'powerinfo'. check ectool powerinfo with and without AC adapter. Change-Id: I2cfd8dfa011e23f819c6bae19cf22b4a7343f044 Signed-off-by: Rong Chang <rongchang@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/63350 Reviewed-by: Vic Yang <victoryang@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.