diff options
| author | Karthikeyan Ramasubramanian <kramasub@chromium.org> | 2018-12-19 14:01:42 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-01-08 14:33:35 -0800 |
| commit | 9e4474e561ec165cf24e8aa249c2aeeed8e7f1ef (patch) | |
| tree | bc5e884a87efd1b852945c37f90ee0e8518a2d69 /common/i2c_master.c | |
| parent | a3a17f0013e294b9b9496d78b9b2ab6cefa45270 (diff) | |
| download | chrome-ec-9e4474e561ec165cf24e8aa249c2aeeed8e7f1ef.tar.gz | |
i2c_master: Protect TCPC I2C tunnels as part of EC_REBOOT_DISABLE_JUMP
Currently EC keeps the I2C tunnels open enabling depthcharge to perform
firmware update on those ports. Once the firmware update is done,
depthcharge triggers a command to protect the I2C tunnels. But not all TCPC
ports are registered for firmware update in depthcharge. This causes
some I2C tunnels to be left unprotected.
Update EC to protect all the TCPC I2C tunnels when depthcharge invokes
EC_REBOOT_DISABLE_JUMP command. This usually happens when the EC
software sync is complete and the control jumps to OS. Also protect the
TCPC I2C tunnels only when the WP is enabled.
BUG=b:119130829
BRANCH=octopus
TEST=make -j buildall && Boot to ChromeOS and ensure that the TCPC I2C
tunnels are protected.
Change-Id: Ice681038bbf725b3aa44b13ff71724937c6045e9
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1390944
Commit-Ready: Karthikeyan Ramasubramanian <kramasub@chromium.org>
Tested-by: Karthikeyan Ramasubramanian <kramasub@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'common/i2c_master.c')
| -rw-r--r-- | common/i2c_master.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/common/i2c_master.c b/common/i2c_master.c index ec2cad96df..c2cc22f06c 100644 --- a/common/i2c_master.c +++ b/common/i2c_master.c @@ -37,7 +37,7 @@ static struct mutex port_mutex[I2C_CONTROLLER_COUNT]; /* A bitmap of the controllers which are currently servicing a request. */ static uint32_t i2c_port_active_list; BUILD_ASSERT(I2C_CONTROLLER_COUNT < 32); -static uint8_t port_protected[I2C_CONTROLLER_COUNT]; +static uint8_t port_protected[I2C_PORT_COUNT]; /** * Non-deterministically test the lock status of the port. If another task @@ -761,6 +761,14 @@ static int i2c_command_passthru(struct host_cmd_handler_args *args) } DECLARE_HOST_COMMAND(EC_CMD_I2C_PASSTHRU, i2c_command_passthru, EC_VER_MASK(0)); +void i2c_passthru_protect_port(uint32_t port) +{ + if (port < I2C_PORT_COUNT) + port_protected[port] = 1; + else + PTHRUPRINTF("Invalid I2C port %d to be protected\n", port); +} + static int i2c_command_passthru_protect(struct host_cmd_handler_args *args) { const struct ec_params_i2c_passthru_protect *params = args->params; @@ -790,7 +798,7 @@ static int i2c_command_passthru_protect(struct host_cmd_handler_args *args) resp->status = port_protected[params->port]; args->response_size = sizeof(*resp); } else if (params->subcmd == EC_CMD_I2C_PASSTHRU_PROTECT_ENABLE) { - port_protected[params->port] = 1; + i2c_passthru_protect_port(params->port); } else { return EC_RES_INVALID_COMMAND; } |