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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 "chipset.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "system.h"
#include "usb_charge.h"
#include "util.h"
#define CPUTS(outstr) cputs(CC_USBCHARGE, outstr)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
#define USB_SYSJUMP_TAG 0x5550 /* "UP" - Usb Port */
#define USB_HOOK_VERSION 1
#define USB_CHARGE_PORT_COUNT 2
/* The previous USB port state before sys jump */
struct usb_state {
uint8_t port_mode[USB_CHARGE_PORT_COUNT];
};
static uint8_t charge_mode[USB_CHARGE_PORT_COUNT];
static void usb_charge_set_control_mode(int port_id, int mode)
{
#ifdef CONFIG_USB_PORT_POWER_SMART_SIMPLE
/*
* One single shared control signal, so the last mode set to either
* port wins. Also, only CTL1 can be set; the other pins are
* hard-wired.
*/
gpio_set_level(GPIO_USB_CTL1, mode & 0x4);
#else
if (port_id == 0) {
gpio_set_level(GPIO_USB1_CTL1, mode & 0x4);
gpio_set_level(GPIO_USB1_CTL2, mode & 0x2);
gpio_set_level(GPIO_USB1_CTL3, mode & 0x1);
} else {
gpio_set_level(GPIO_USB2_CTL1, mode & 0x4);
gpio_set_level(GPIO_USB2_CTL2, mode & 0x2);
gpio_set_level(GPIO_USB2_CTL3, mode & 0x1);
}
#endif
}
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)
{
#ifdef CONFIG_USB_PORT_POWER_SMART_SIMPLE
/* ILIM_SEL signal is shared too */
gpio_set_level(GPIO_USB_ILIM_SEL, sel);
#else
if (port_id == 0)
gpio_set_level(GPIO_USB1_ILIM_SEL, sel);
else
gpio_set_level(GPIO_USB2_ILIM_SEL, sel);
#endif
}
static void usb_charge_all_ports_on(void)
{
usb_charge_set_mode(0, USB_CHARGE_MODE_SDP2);
usb_charge_set_mode(1, USB_CHARGE_MODE_SDP2);
}
static void usb_charge_all_ports_off(void)
{
usb_charge_set_mode(0, USB_CHARGE_MODE_DISABLED);
usb_charge_set_mode(1, USB_CHARGE_MODE_DISABLED);
}
int usb_charge_ports_enabled(void)
{
int mask = 0;
if (gpio_get_level(GPIO_USB1_ENABLE))
mask |= (1 << 0);
if (gpio_get_level(GPIO_USB2_ENABLE))
mask |= (1 << 1);
return mask;
}
int usb_charge_set_mode(int port_id, enum usb_charge_mode mode)
{
CPRINTF("[%T USB charge p%d m%d]\n", port_id, mode);
if (port_id >= USB_CHARGE_PORT_COUNT)
return EC_ERROR_INVAL;
switch (mode) {
case USB_CHARGE_MODE_DISABLED:
usb_charge_set_enabled(port_id, 0);
break;
case USB_CHARGE_MODE_SDP2:
usb_charge_set_control_mode(port_id, 7);
usb_charge_set_ilim(port_id, 0);
usb_charge_set_enabled(port_id, 1);
break;
case USB_CHARGE_MODE_CDP:
usb_charge_set_control_mode(port_id, 7);
usb_charge_set_ilim(port_id, 1);
usb_charge_set_enabled(port_id, 1);
break;
case USB_CHARGE_MODE_DCP_SHORT:
usb_charge_set_control_mode(port_id, 4);
usb_charge_set_enabled(port_id, 1);
break;
default:
return EC_ERROR_UNKNOWN;
}
charge_mode[port_id] = mode;
return EC_SUCCESS;
}
/*****************************************************************************/
/* Console commands */
static int command_set_mode(int argc, char **argv)
{
int port_id = -1;
int mode = -1;
char *e;
if (argc == 1) {
ccprintf("Port 0: %d\nPort 1: %d\n",
charge_mode[0], charge_mode[1]);
return EC_SUCCESS;
}
if (argc != 3)
return EC_ERROR_PARAM_COUNT;
port_id = strtoi(argv[1], &e, 0);
if (*e || port_id < 0 || port_id >= USB_CHARGE_PORT_COUNT)
return EC_ERROR_PARAM1;
mode = strtoi(argv[2], &e, 0);
if (*e || mode < 0 || mode >= USB_CHARGE_MODE_COUNT)
return EC_ERROR_PARAM2;
return usb_charge_set_mode(port_id, mode);
}
DECLARE_CONSOLE_COMMAND(usbchargemode, command_set_mode,
"[<port> <0 | 1 | 2 | 3>]",
"Set USB charge mode",
"Modes: 0=Disabled.\n"
" 1=Standard downstream port.\n"
" 2=Charging downstream port, BC 1.2.\n"
" 3=Dedicated charging port, BC 1.2.\n");
/*****************************************************************************/
/* Host commands */
static int usb_charge_command_set_mode(struct host_cmd_handler_args *args)
{
const struct ec_params_usb_charge_set_mode *p = args->params;
if (usb_charge_set_mode(p->usb_port_id, p->mode) != EC_SUCCESS)
return EC_RES_ERROR;
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_CHARGE_SET_MODE,
usb_charge_command_set_mode,
EC_VER_MASK(0));
/*****************************************************************************/
/* Hooks */
static void usb_charge_preserve_state(void)
{
struct usb_state state;
state.port_mode[0] = charge_mode[0];
state.port_mode[1] = charge_mode[1];
system_add_jump_tag(USB_SYSJUMP_TAG, USB_HOOK_VERSION,
sizeof(state), &state);
}
DECLARE_HOOK(HOOK_SYSJUMP, usb_charge_preserve_state, HOOK_PRIO_DEFAULT);
static void usb_charge_init(void)
{
const struct usb_state *prev;
int version, size;
prev = (const struct usb_state *)system_get_jump_tag(USB_SYSJUMP_TAG,
&version, &size);
if (prev && version == USB_HOOK_VERSION && size == sizeof(*prev)) {
usb_charge_set_mode(0, prev->port_mode[0]);
usb_charge_set_mode(1, prev->port_mode[1]);
} else {
usb_charge_all_ports_off();
}
}
DECLARE_HOOK(HOOK_INIT, usb_charge_init, HOOK_PRIO_DEFAULT);
static void usb_charge_resume(void)
{
/* Turn on USB ports on as we go into S0 from S3 or S5. */
usb_charge_all_ports_on();
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, usb_charge_resume, HOOK_PRIO_DEFAULT);
static void usb_charge_shutdown(void)
{
/* Turn on USB ports off as we go back to S5. */
usb_charge_all_ports_off();
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, usb_charge_shutdown, HOOK_PRIO_DEFAULT);
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