mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-08 16:41:55 +00:00
f4602ec472
We don't want the PPC to connect the CC lines from the TCPC to the USB connector until the TCPC resistors are set in a valid state (SINK initially). If we connect the CC lines (happens in the ppc_init) before setting the resistor values, some TCPC will be toggling the CC line between Rp/Rd since it doesn't detect a cable yet. In the dead battery charging case, connecting the toggling CC lines to the charger can rail the CC lines to 3.3 V signaling to the charger to disconnect Vbus, thus browning out the board. BRANCH=none BUG=b:71865251 TEST=Grunt powers on via usbc p0 with and without USB hub. Change-Id: I8e78aa2af42075398fab89a2dccef5e7df27b260 Signed-off-by: Jett Rink <jettrink@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/882305 Reviewed-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Edward Hill <ecgh@chromium.org>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/* Copyright 2017 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* USB-C Power Path Controller Common Code */
|
|
|
|
#include "common.h"
|
|
#include "console.h"
|
|
#include "hooks.h"
|
|
#include "usbc_ppc.h"
|
|
#include "util.h"
|
|
|
|
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
|
|
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
|
|
|
|
/* Simple wrappers to dispatch to the drivers. */
|
|
|
|
int ppc_init(int port)
|
|
{
|
|
int rv;
|
|
|
|
if (port >= ppc_cnt)
|
|
return EC_ERROR_INVAL;
|
|
|
|
rv = ppc_chips[port].drv->init(port);
|
|
if (rv)
|
|
CPRINTS("p%d: PPC init failed! (%d)", port, rv);
|
|
else
|
|
CPRINTS("p%d: PPC init'd.", port);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int ppc_is_sourcing_vbus(int port)
|
|
{
|
|
if ((port < 0) || (port >= ppc_cnt)) {
|
|
CPRINTS("%s(%d) Invalid port!", __func__, port);
|
|
return 0;
|
|
}
|
|
|
|
return ppc_chips[port].drv->is_sourcing_vbus(port);
|
|
}
|
|
|
|
int ppc_set_vbus_source_current_limit(int port, enum tcpc_rp_value rp)
|
|
{
|
|
if ((port < 0) || (port >= ppc_cnt))
|
|
return EC_ERROR_INVAL;
|
|
|
|
return ppc_chips[port].drv->set_vbus_source_current_limit(port, rp);
|
|
}
|
|
|
|
int ppc_vbus_sink_enable(int port, int enable)
|
|
{
|
|
if ((port < 0) || (port >= ppc_cnt))
|
|
return EC_ERROR_INVAL;
|
|
|
|
return ppc_chips[port].drv->vbus_sink_enable(port, enable);
|
|
}
|
|
|
|
int ppc_vbus_source_enable(int port, int enable)
|
|
{
|
|
if ((port < 0) || (port >= ppc_cnt))
|
|
return EC_ERROR_INVAL;
|
|
|
|
return ppc_chips[port].drv->vbus_source_enable(port, enable);
|
|
}
|
|
|
|
#ifdef CONFIG_USB_PD_VBUS_DETECT_PPC
|
|
int ppc_is_vbus_present(int port, int *vbus_present)
|
|
{
|
|
if (port >= ppc_cnt)
|
|
return EC_ERROR_INVAL;
|
|
|
|
return ppc_chips[port].drv->is_vbus_present(port, vbus_present);
|
|
}
|
|
#endif /* defined(CONFIG_USB_PD_VBUS_DETECT_PPC) */
|
|
|
|
|
|
#ifdef CONFIG_CMD_PPC_DUMP
|
|
static int command_ppc_dump(int argc, char **argv)
|
|
{
|
|
int port;
|
|
|
|
if (argc < 2)
|
|
return EC_ERROR_PARAM_COUNT;
|
|
|
|
port = atoi(argv[1]);
|
|
if (port >= ppc_cnt)
|
|
return EC_ERROR_PARAM1;
|
|
|
|
return ppc_chips[port].drv->reg_dump(port);
|
|
}
|
|
DECLARE_CONSOLE_COMMAND(ppc_dump, command_ppc_dump, "<Type-C port>",
|
|
"dump the PPC regs");
|
|
#endif /* defined(CONFIG_CMD_PPC_DUMP) */
|