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/* Copyright (c) 2012 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 charging control module for Chrome EC */
#include "usb_charge.h"
#include "board.h"
#include "gpio.h"
#include "uart.h"
#include "console.h"
#include "util.h"
static void usb_charge_set_control_mode(int port_id, int mode)
{
if (port_id == 0) {
gpio_set_level(GPIO_USB1_CTL1, (mode & 0x4) >> 2);
gpio_set_level(GPIO_USB1_CTL2, (mode & 0x2) >> 1);
gpio_set_level(GPIO_USB1_CTL3, mode & 0x1);
}
else if (port_id == 1) {
gpio_set_level(GPIO_USB2_CTL1, (mode & 0x4) >> 2);
gpio_set_level(GPIO_USB2_CTL2, (mode & 0x2) >> 1);
gpio_set_level(GPIO_USB2_CTL3, mode & 0x1);
}
}
static void usb_charge_set_enabled(int port_id, int en)
{
if (port_id == 0)
gpio_set_level(GPIO_USB1_ENABLE, en);
else
gpio_set_level(GPIO_USB2_ENABLE, en);
}
static void usb_charge_set_ilim(int port_id, int sel)
{
if (port_id == 0)
gpio_set_level(GPIO_USB1_ILIM_SEL, sel);
else
gpio_set_level(GPIO_USB2_ILIM_SEL, sel);
}
int usb_charge_set_mode(int port_id, enum usb_charge_mode mode)
{
if (port_id >= USB_CHARGE_PORT_COUNT)
return EC_ERROR_INVAL;
if (mode == USB_CHARGE_MODE_DISABLED) {
usb_charge_set_enabled(port_id, 0);
return EC_SUCCESS;
}
else
usb_charge_set_enabled(port_id, 1);
switch (mode) {
case USB_CHARGE_MODE_CHARGE_AUTO:
usb_charge_set_control_mode(port_id, 1);
usb_charge_set_ilim(port_id, 1);
break;
case USB_CHARGE_MODE_CHARGE_BC12:
usb_charge_set_control_mode(port_id, 4);
break;
case USB_CHARGE_MODE_DOWNSTREAM_500MA:
usb_charge_set_control_mode(port_id, 2);
usb_charge_set_ilim(port_id, 0);
break;
case USB_CHARGE_MODE_DOWNSTREAM_1500MA:
usb_charge_set_control_mode(port_id, 2);
usb_charge_set_ilim(port_id, 1);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
/*****************************************************************************/
/* Console commands */
static int command_set_mode(int argc, char **argv)
{
int port_id = -1;
int mode = -1;
char* endptr;
if (argc != 3) {
uart_puts("Usage: usbchargemode <port_id> <mode>\n");
uart_puts("Modes: 0=Disabled.\n"
" 1=Dedicated charging. Auto select.\n"
" 2=Dedicated charging. BC 1.2.\n"
" 3=Downstream. Max 500mA.\n"
" 4=Downstream. Max 1.5A.\n");
return EC_ERROR_UNKNOWN;
}
port_id = strtoi(argv[1], &endptr, 0);
if (*endptr || port_id < 0 || port_id >= USB_CHARGE_PORT_COUNT) {
uart_puts("Invalid port ID.\n");
return EC_ERROR_UNKNOWN;
}
mode = strtoi(argv[2], &endptr, 0);
if (*endptr || mode < 0 || mode >= USB_CHARGE_MODE_COUNT) {
uart_puts("Invalid mode.\n");
return EC_ERROR_UNKNOWN;
}
uart_printf("Setting USB mode...\n");
return usb_charge_set_mode(port_id, mode);
}
DECLARE_CONSOLE_COMMAND(usbchargemode, command_set_mode);
/*****************************************************************************/
/* Initialization */
int usb_charge_init(void)
{
int i;
for (i = 0; i < USB_CHARGE_PORT_COUNT; ++i)
usb_charge_set_mode(i, USB_CHARGE_MODE_DOWNSTREAM_500MA);
return EC_SUCCESS;
}
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