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chromeec: Add google_chromeec_pd_get_amode 

The google_chromeec_pd_get_amode API checks whether TCPM is in a
specified alternate mode or not.

BUG=b:72387533
BRANCH=none
TEST=See 23746 "mb/google/fizz: Wait until display is ready"

Change-Id: Ib9b4ad06b61326fa167c77758603e038d817f928
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://review.coreboot.org/23744
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Daisuke Nojiri 2018-01-26 17:36:44 -08:00 committed by Aaron Durbin
parent 3fe3f0409c
commit 476c2c5808
2 changed files with 49 additions and 0 deletions
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48
src/ec/google/chromeec/ec.c
View File

@ -936,3 +936,51 @@ int google_ec_running_ro(void)
#endif /* ! __SMM__ */
#endif /* ! __PRE_RAM__ */
/**
* Check if EC/TCPM is in an alternate mode or not.
*
* @param svid SVID of the alternate mode to check
* @return 0: Not in the mode. -1: Error. 1: Yes.
*/
int google_chromeec_pd_get_amode(uint16_t svid)
{
struct ec_response_usb_pd_ports r;
struct chromeec_command cmd;
int i;
cmd.cmd_code = EC_CMD_USB_PD_PORTS;
cmd.cmd_version = 0;
cmd.cmd_data_in = NULL;
cmd.cmd_size_in = 0;
cmd.cmd_data_out = &r;
cmd.cmd_size_out = sizeof(r);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) < 0)
return -1;
for (i = 0; i < r.num_ports; i++) {
struct ec_params_usb_pd_get_mode_request p;
struct ec_params_usb_pd_get_mode_response res;
p.port = i;
p.svid_idx = 0;
cmd.cmd_code = EC_CMD_USB_PD_GET_AMODE;
cmd.cmd_version = 0;
cmd.cmd_data_in = &p;
cmd.cmd_size_in = sizeof(p);
cmd.cmd_data_out = &res;
cmd.cmd_size_out = sizeof(res);
cmd.cmd_dev_index = 0;
do {
if (google_chromeec_command(&cmd) < 0)
return -1;
if (res.svid == svid)
return 1;
p.svid_idx++;
} while (res.svid);
}
return 0;
}

1
src/ec/google/chromeec/ec.h
View File

@ -36,6 +36,7 @@ u8 google_chromeec_get_event(void);
bool google_chromeec_is_uhepi_supported(void);
int google_ec_running_ro(void);
void google_chromeec_init(void);
int google_chromeec_pd_get_amode(uint16_t svid);
/* Device events */
uint64_t google_chromeec_get_device_enabled_events(void);