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/* Copyright (c) 2014 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.
*/
#include "adc.h"
#include "board.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "registers.h"
#include "task.h"
#include "timer.h"
#include "util.h"
#include "usb_pd.h"
#include "version.h"
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
/* Acceptable margin between requested VBUS and measured value */
#define MARGIN_MV 400 /* mV */
#define PDO_FIXED_FLAGS (PDO_FIXED_DATA_SWAP | PDO_FIXED_EXTERNAL |\
PDO_FIXED_COMM_CAP)
/* Source PDOs */
const uint32_t pd_src_pdo[] = {
PDO_FIXED(5000, 3000, PDO_FIXED_FLAGS),
PDO_FIXED(12000, 3000, PDO_FIXED_FLAGS),
PDO_FIXED(20000, 3000, PDO_FIXED_FLAGS),
};
static const int pd_src_pdo_cnts[3] = {
[SRC_CAP_5V] = 1,
[SRC_CAP_12V] = 2,
[SRC_CAP_20V] = 3,
};
static int pd_src_pdo_idx;
/* Fake PDOs : we just want our pre-defined voltages */
const uint32_t pd_snk_pdo[] = {
PDO_FIXED(5000, 500, PDO_FIXED_FLAGS),
PDO_FIXED(12000, 500, PDO_FIXED_FLAGS),
PDO_FIXED(20000, 500, PDO_FIXED_FLAGS),
};
const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);
/* Whether alternate mode has been entered or not */
static int alt_mode;
void board_set_source_cap(enum board_src_cap cap)
{
pd_src_pdo_idx = cap;
}
int charge_manager_get_source_pdo(const uint32_t **src_pdo)
{
*src_pdo = pd_src_pdo;
return pd_src_pdo_cnts[pd_src_pdo_idx];
}
void pd_set_input_current_limit(int port, uint32_t max_ma,
uint32_t supply_voltage)
{
/* No battery, nothing to do */
return;
}
int pd_is_valid_input_voltage(int mv)
{
/* Any voltage less than the max is allowed */
return 1;
}
int pd_board_check_request(uint32_t rdo, int pdo_cnt)
{
int idx = RDO_POS(rdo);
/* Check for invalid index */
return (!idx || idx > pdo_cnt) ?
EC_ERROR_INVAL : EC_SUCCESS;
}
void pd_transition_voltage(int idx)
{
gpio_set_level(GPIO_USBC_VSEL_0, idx >= 2);
gpio_set_level(GPIO_USBC_VSEL_1, idx >= 3);
}
int pd_set_power_supply_ready(int port)
{
/* Output the correct voltage */
gpio_set_level(GPIO_VBUS_CHARGER_EN, 1);
return EC_SUCCESS;
}
void pd_power_supply_reset(int port)
{
/* Kill VBUS */
gpio_set_level(GPIO_VBUS_CHARGER_EN, 0);
gpio_set_level(GPIO_USBC_VSEL_0, 0);
gpio_set_level(GPIO_USBC_VSEL_1, 0);
}
int pd_snk_is_vbus_provided(int port)
{
return gpio_get_level(GPIO_VBUS_WAKE);
}
int pd_board_checks(void)
{
static int was_connected = -1;
if (was_connected != 1 && pd_is_connected(0))
board_maybe_reset_usb_hub();
was_connected = pd_is_connected(0);
return EC_SUCCESS;
}
int pd_check_power_swap(int port)
{
/* Always allow power swap */
return 1;
}
int pd_check_data_swap(int port, int data_role)
{
/* Always allow data swap */
return 1;
}
void pd_execute_data_swap(int port, int data_role)
{
/* Do nothing */
}
void pd_check_pr_role(int port, int pr_role, int flags)
{
}
void pd_check_dr_role(int port, int dr_role, int flags)
{
/* If Plankton is in USB hub mode, always act as UFP */
if (board_in_hub_mode() && dr_role == PD_ROLE_DFP &&
(flags & PD_FLAGS_PARTNER_DR_DATA))
pd_request_data_swap(port);
}
/* ----------------- Vendor Defined Messages ------------------ */
const uint32_t vdo_idh = VDO_IDH(0, /* data caps as USB host */
0, /* data caps as USB device */
IDH_PTYPE_AMA, /* Alternate mode */
1, /* supports alt modes */
USB_VID_GOOGLE);
const uint32_t vdo_product = VDO_PRODUCT(CONFIG_USB_PID, CONFIG_USB_BCD_DEV);
const uint32_t vdo_ama = VDO_AMA(CONFIG_USB_PD_IDENTITY_HW_VERS,
CONFIG_USB_PD_IDENTITY_SW_VERS,
0, 0, 0, 0, /* SS[TR][12] */
0, /* Vconn power */
0, /* Vconn power required */
1, /* Vbus power required */
AMA_USBSS_BBONLY /* USB SS support */);
static int svdm_response_identity(int port, uint32_t *payload)
{
payload[VDO_I(IDH)] = vdo_idh;
payload[VDO_I(CSTAT)] = VDO_CSTAT(0);
payload[VDO_I(PRODUCT)] = vdo_product;
payload[VDO_I(AMA)] = vdo_ama;
return VDO_I(AMA) + 1;
}
static int svdm_response_svids(int port, uint32_t *payload)
{
payload[1] = VDO_SVID(USB_SID_DISPLAYPORT, 0);
return 2;
}
/*
* Will only ever be a single mode for this UFP_D device as it has no real USB
* support making it only PIN_E configureable
*/
#define MODE_CNT 1
#define OPOS 1
const uint32_t vdo_dp_mode[MODE_CNT] = {
VDO_MODE_DP(0, /* UFP pin cfg supported : none */
MODE_DP_PIN_E, /* DFP pin cfg supported */
1, /* no usb2.0 signalling in AMode */
CABLE_PLUG, /* its a plug */
MODE_DP_V13, /* DPv1.3 Support, no Gen2 */
MODE_DP_SNK) /* Its a sink only */
};
static int svdm_response_modes(int port, uint32_t *payload)
{
if (gpio_get_level(GPIO_USBC_SS_USB_MODE))
return 0; /* nak */
if (PD_VDO_VID(payload[0]) != USB_SID_DISPLAYPORT)
return 0; /* nak */
memcpy(payload + 1, vdo_dp_mode, sizeof(vdo_dp_mode));
return MODE_CNT + 1;
}
static int dp_status(int port, uint32_t *payload)
{
int opos = PD_VDO_OPOS(payload[0]);
int hpd = gpio_get_level(GPIO_DPSRC_HPD);
if (opos != OPOS)
return 0; /* nak */
payload[1] = VDO_DP_STATUS(0, /* IRQ_HPD */
(hpd == 1), /* HPD_HI|LOW */
0, /* request exit DP */
0, /* request exit USB */
0, /* MF pref */
!gpio_get_level(GPIO_USBC_SS_USB_MODE),
0, /* power low */
0x2);
return 2;
}
static int dp_config(int port, uint32_t *payload)
{
if (PD_DP_CFG_DPON(payload[1]))
gpio_set_level(GPIO_USBC_SS_USB_MODE, 0);
return 1;
}
static int svdm_enter_mode(int port, uint32_t *payload)
{
int usb_mode = gpio_get_level(GPIO_USBC_SS_USB_MODE);
/* SID & mode request is valid */
if ((PD_VDO_VID(payload[0]) != USB_SID_DISPLAYPORT) ||
(PD_VDO_OPOS(payload[0]) != OPOS))
return 0; /* will generate NAK */
if (usb_mode) {
CPRINTS("Toggle USB_MODE if you want DP & re-connect");
return 0;
}
alt_mode = OPOS;
return 1;
}
int pd_alt_mode(int port, uint16_t svid)
{
return alt_mode;
}
static int svdm_exit_mode(int port, uint32_t *payload)
{
alt_mode = 0;
/*
* Don't actually toggle GPIO_USBC_SS_USB_MODE since its manually
* controlled by operator.
*/
return 1; /* Must return ACK */
}
static struct amode_fx dp_fx = {
.status = &dp_status,
.config = &dp_config,
};
const struct svdm_response svdm_rsp = {
.identity = &svdm_response_identity,
.svids = &svdm_response_svids,
.modes = &svdm_response_modes,
.enter_mode = &svdm_enter_mode,
.amode = &dp_fx,
.exit_mode = &svdm_exit_mode,
};
int pd_custom_vdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload)
{
int cmd = PD_VDO_CMD(payload[0]);
int rsize = 1;
CPRINTF("VDM/%d [%d] %08x\n", cnt, cmd, payload[0]);
*rpayload = payload;
switch (cmd) {
case VDO_CMD_VERSION:
memcpy(payload + 1, ¤t_image_data.version, 24);
rsize = 7;
break;
default:
rsize = 0;
}
CPRINTS("DONE");
/* respond (positively) to the request */
payload[0] |= VDO_SRC_RESPONDER;
return rsize;
}
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