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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 "charger.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"
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
const uint32_t pd_src_pdo[] = {
PDO_FIXED(5000, 500, PDO_FIXED_EXTERNAL),
PDO_FIXED(5000, 3000, 0),
PDO_FIXED(12000, 3000, 0),
PDO_FIXED(20000, 2000, 0),
};
const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo);
const uint32_t pd_snk_pdo[] = {
PDO_BATT(4500, 5500, 15000),
PDO_BATT(11500, 12500, 36000),
};
const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);
/* Cap on the max voltage requested as a sink (in millivolts) */
static unsigned max_mv = -1; /* no cap */
int pd_choose_voltage(int cnt, uint32_t *src_caps, uint32_t *rdo)
{
int i;
int sel_mv;
int max_uw = 0;
int max_ma;
int max_i = -1;
/* Get max power */
for (i = 0; i < cnt; i++) {
int uw;
int mv = ((src_caps[i] >> 10) & 0x3FF) * 50;
if ((src_caps[i] & PDO_TYPE_MASK) == PDO_TYPE_BATTERY) {
uw = 250000 * (src_caps[i] & 0x3FF);
} else {
int ma = (src_caps[i] & 0x3FF) * 10;
uw = ma * mv;
}
if ((uw > max_uw) && (mv <= max_mv)) {
max_i = i;
max_uw = uw;
sel_mv = mv;
}
}
if (max_i < 0)
return -EC_ERROR_UNKNOWN;
/* request all the power ... */
if ((src_caps[max_i] & PDO_TYPE_MASK) == PDO_TYPE_BATTERY) {
int uw = 250000 * (src_caps[max_i] & 0x3FF);
max_ma = uw / sel_mv;
*rdo = RDO_BATT(max_i + 1, uw/2, uw, 0);
CPRINTF("Request [%d] %dV %dmW\n",
max_i, sel_mv/1000, uw/1000);
} else {
int ma = 10 * (src_caps[max_i] & 0x3FF);
max_ma = ma;
*rdo = RDO_FIXED(max_i + 1, ma / 2, ma, 0);
CPRINTF("Request [%d] %dV %dmA\n",
max_i, sel_mv/1000, ma);
}
return max_ma;
}
void pd_set_input_current_limit(int port, uint32_t max_ma)
{
int rv = charger_set_input_current(MAX(max_ma,
CONFIG_CHARGER_INPUT_CURRENT));
if (rv < 0)
CPRINTS("Failed to set input current limit for PD");
}
void pd_set_max_voltage(unsigned mv)
{
max_mv = mv;
}
int pd_request_voltage(uint32_t rdo)
{
int op_ma = rdo & 0x3FF;
int max_ma = (rdo >> 10) & 0x3FF;
int idx = rdo >> 28;
uint32_t pdo;
uint32_t pdo_ma;
if (!idx || idx > pd_src_pdo_cnt)
return EC_ERROR_INVAL; /* Invalid index */
/* check current ... */
pdo = pd_src_pdo[idx - 1];
pdo_ma = (pdo & 0x3ff);
if (op_ma > pdo_ma)
return EC_ERROR_INVAL; /* too much op current */
if (max_ma > pdo_ma)
return EC_ERROR_INVAL; /* too much max current */
CPRINTF("Switch to %d V %d mA (for %d/%d mA)\n",
((pdo >> 10) & 0x3ff) * 50, (pdo & 0x3ff) * 10,
((rdo >> 10) & 0x3ff) * 10, (rdo & 0x3ff) * 10);
return EC_SUCCESS;
}
int pd_set_power_supply_ready(int port)
{
/* provide VBUS */
gpio_set_level(GPIO_USB_C_5V_EN, 1);
return EC_SUCCESS; /* we are ready */
}
void pd_power_supply_reset(int port)
{
/* Kill VBUS */
gpio_set_level(GPIO_USB_C_5V_EN, 0);
}
int pd_board_checks(void)
{
return EC_SUCCESS;
}
/* ----------------- Vendor Defined Messages ------------------ */
const struct svdm_response svdm_rsp = {
.identity = NULL,
.svids = NULL,
.modes = NULL,
};
static int pd_custom_vdm(int port, int cnt, uint32_t *payload,
uint32_t **rpayload)
{
int cmd = PD_VDO_CMD(payload[0]);
uint16_t dev_id = 0;
CPRINTF("VDM/%d [%d] %08x\n", cnt, cmd, payload[0]);
/* make sure we have some payload */
if (cnt == 0)
return 0;
switch (cmd) {
case VDO_CMD_VERSION:
/* guarantee last byte of payload is null character */
*(payload + cnt - 1) = 0;
CPRINTF("version: %s\n", (char *)(payload+1));
break;
case VDO_CMD_READ_INFO:
case VDO_CMD_SEND_INFO:
/* if last word is present, it contains lots of info */
if (cnt == 7) {
dev_id = VDO_INFO_HW_DEV_ID(payload[6]);
CPRINTF("Dev:0x%04x SW:%d RW:%d\n", dev_id,
VDO_INFO_SW_DBG_VER(payload[6]),
VDO_INFO_IS_RW(payload[6]));
}
/* copy hash */
if (cnt >= 6)
pd_dev_store_rw_hash(port, dev_id, payload + 1);
break;
}
return 0;
}
int pd_vdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload)
{
if (PD_VDO_SVDM(payload[0]))
return pd_svdm(port, cnt, payload, rpayload);
else
return pd_custom_vdm(port, cnt, payload, rpayload);
}
static void svdm_enter_dp_mode(int port, uint32_t mode_caps)
{
CPRINTF("Entering mode w/ vdo = %08x\n", mode_caps);
}
static void svdm_exit_dp_mode(int port)
{
CPRINTF("Exiting mode\n");
/* return to safe config */
}
const struct svdm_amode_fx supported_modes[] = {
{
.svid = USB_SID_DISPLAYPORT,
.enter = &svdm_enter_dp_mode,
.exit = &svdm_exit_dp_mode,
},
};
const int supported_modes_cnt = ARRAY_SIZE(supported_modes);
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