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samus_pd: provide VBUS in host mode

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When we are a USB host (and a power source), provide 5V VBUS on the
type-C receptacle.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=none
BUG=chrome-os-partner:28782
TEST=on Samus, put port0 in host mode (by doing "pd charger" on the PD
MCU command line), then insert a type-C to type-A cable and observe we
have VBUS on the other side.

Change-Id: I5c6cd78b54dc1c651420eaaf122b8545b9f0b0de
Reviewed-on: https://chromium-review.googlesource.com/201066
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Vincent Palatin
2014-05-22 08:51:51 -07:00
committed by chrome-internal-fetch
parent 3d9544ae42
commit 5725f4f0ef
2 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
board/samus_pd/usb_pd_config.h
View File

@@ -92,13 +92,19 @@ static inline void pd_tx_init(void)
static inline void pd_set_host_mode(int enable)
{
if (enable) {
/* We never charging in power source mode */
gpio_set_level(GPIO_USB_C0_CHARGE_EN_L, 1);
/* High-Z is used for host mode. */
gpio_set_level(GPIO_USB_C0_CC1_ODL, 1);
gpio_set_level(GPIO_USB_C0_CC2_ODL, 1);
} else {
/* Kill VBUS power supply */
gpio_set_level(GPIO_USB_C0_5V_EN, 0);
/* Pull low for device mode. */
gpio_set_level(GPIO_USB_C0_CC1_ODL, 0);
gpio_set_level(GPIO_USB_C0_CC2_ODL, 0);
/* Enable the charging path*/
gpio_set_level(GPIO_USB_C0_CHARGE_EN_L, 0);
}
}

6
board/samus_pd/usb_pd_policy.c
View File

@@ -6,6 +6,7 @@
#include "board.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "registers.h"
#include "task.h"
@@ -106,11 +107,16 @@ int pd_request_voltage(uint32_t rdo)
int pd_set_power_supply_ready(void)
{
/* provide VBUS */
gpio_set_level(GPIO_USB_C0_5V_EN, 1);
return EC_SUCCESS; /* we are ready */
}
void pd_power_supply_reset(void)
{
/* Kill VBUS */
gpio_set_level(GPIO_USB_C0_5V_EN, 0);
}
int pd_board_checks(void)