nyan*: I2C: Implement bus clear when 'ARB_LOST' error occurs

This is a fix for the 'Lost arb' we're seeing on Nyan* during
reboot stress testing. It occurs when we are slamming the
default PMIC registers with pmic_write_reg().

Currently, I've only captured this a few times, and the bus
clear seemed to work, as the PMIC writes continued (where
they'd hang the system before bus clear) for a couple of regs,
then it hangs hard, no messages, no 2nd lost arb, etc. So
I've added code to the PMIC write function that will reset the
SoC if any I2C error occurs. That seems to recover OK, i.e. on
the next reboot the PMIC writes all go thru, boot is OK, kernel
loads, etc.

BUG=chrome-os-partner:28323
BRANCH=nyan
TEST=Tested on nyan. Built for nyan and nyan_big.

Original-Change-Id: I1ac5e3023ae22c015105b7f0fb7849663b4aa982
Original-Signed-off-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/197732
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Jimmy Zhang <jimmzhang@nvidia.com>
(cherry picked from commit f445127e2d9e223a5ef9117008a7ac7631a7980c)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I584d55b99d65f1e278961db6bdde1845cb01f3bc
Reviewed-on: http://review.coreboot.org/7897
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
blaze: change ramcode 0000 to use 792MHz bct

The original sdram-hynix-2GB-792.inc was just copied from nyan
bct file. This change updates the cfg file for Hynix 2GB, 792MHz
DRAM based on the data generated by t124_emc_reg_tool.

BUG=none
BRANCH=blaze
TEST=emerged coreboot, booted successfully into kernel.

Original-Change-Id: I9534b4df6d35193179de124309df12ed830098a0
Original-Signed-off-by: Ken Chang <kenc@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/197660
Original-Reviewed-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-by: Hung-Te Lin <hungte@chromium.org>
(cherry picked from commit 797dabe54f2679bb5717961dda1947df453eb0f1)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ie67bedb29d5d9c3a3b58d949ddf9600716c385ec
Reviewed-on: http://review.coreboot.org/7898
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
tegra124: Add a utility function to read the cause of the most recent reset.

When a watchdog reset happens, the SOC will reset but other parts of the
system might not. In order to detect those situations we can check the
rst_status register in the PMC.

BUG=chrome-os-partner:28559
TEST=With this and a change which uses the new function in the nyan boards,
built for nyan, nyan_big and nyan_blaze. Booted normally, through EC reset,
software reset ("reboot" command from the terminal), and through watch dog
reset. Verified that the new code only triggered during the watchdog reset and
that the system rebooted and was able to boot without going into recovery mode
unnecessarily.
BRANCH=nyan

Original-Change-Id: I7430768baa0304d4ec8524957a9cc37078ac5a71
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/198581
Original-Reviewed-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 5fdc0239fc2960167dd9c074f3804bf9e4ad686a)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I5845d3a4d819868f5472c758e83e83b00e141b72
Reviewed-on: http://review.coreboot.org/7899
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
nyan*: Detect watchdog resets and reset the whole machine.

When a watchdog reset happens, the SOC will reset but other parts of the
system might not. That puts the machine in a funny state and may prevent it
from booting properly.

BUG=chrome-os-partner:28559
TEST=Built for nyan, nyan_big and nyan_blaze. Booted normally, through EC
reset, software reset ("reboot" command from the terminal), and through watch
dog reset. Verified that the new code only triggered during the watchdog reset
and that the system rebooted and was able to boot without going into recovery
mode unnecessarily.
BRANCH=nyan

Change-Id: Id92411c928344547fcd97e45063e4aff52d2e9e8
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/198582
Reviewed-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit b298be41c0959c58aeb8be5bf15141549da2504c)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/7900
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
blaze: change ramcode 0001/0010 to use 792MHz bct

This change updates the cfg file for Micron/Samsung 2GB,
792MHz DRAM based on the data generated by t124_emc_reg_tool.

BUG=none
BRANCH=blaze
TEST=emerged coreboot, booted successfully into kernel.

Original-Change-Id: I840cdd967c3b38479946a497a91da89bef5a98ad
Original-Signed-off-by: Jerry Wang <jerryw@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/199296
Original-Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-by: Tom Warren <twarren@nvidia.com>
(cherry picked from commit cb70674c6551c8c36d2fd2d220e0f677ed2c6b24)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I11222bc1453a76cc27c2be169be5d3481ed7cfe7
Reviewed-on: http://review.coreboot.org/7902
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>