| /* 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 CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args) |
| |
| #define USB_SYSJUMP_TAG 0x5550 /* "UP" - Usb Port */ |
| #define USB_HOOK_VERSION 1 |
| |
| static uint8_t charge_mode[USB_PORT_COUNT]; |
| extern const int usb_port_enable[USB_PORT_COUNT]; |
| |
| static void usb_port_set_enabled(int port_id, int en) |
| { |
| gpio_set_level(usb_port_enable[port_id], en); |
| charge_mode[port_id] = en; |
| } |
| |
| static void usb_port_all_ports_on(void) |
| { |
| int i; |
| for (i = 0; i < USB_PORT_COUNT; i++) |
| usb_port_set_enabled(i, 1); |
| } |
| |
| static void usb_port_all_ports_off(void) |
| { |
| int i; |
| for (i = 0; i < USB_PORT_COUNT; i++) |
| usb_port_set_enabled(i, 0); |
| } |
| |
| /*****************************************************************************/ |
| /* Host commands */ |
| |
| int usb_charge_set_mode(int port_id, enum usb_charge_mode mode) |
| { |
| CPRINTS("USB port p%d %d", port_id, mode); |
| |
| if (port_id < 0 || port_id >= USB_PORT_COUNT) |
| return EC_ERROR_INVAL; |
| |
| switch (mode) { |
| case USB_CHARGE_MODE_DISABLED: |
| usb_port_set_enabled(port_id, 0); |
| break; |
| case USB_CHARGE_MODE_ENABLED: |
| usb_port_set_enabled(port_id, 1); |
| break; |
| default: |
| return EC_ERROR_UNKNOWN; |
| } |
| |
| return EC_SUCCESS; |
| } |
| |
| static int usb_port_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_port_command_set_mode, |
| EC_VER_MASK(0)); |
| |
| /*****************************************************************************/ |
| /* Console commands */ |
| |
| static int command_set_mode(int argc, char **argv) |
| { |
| int port_id = -1; |
| int mode = -1; |
| int i; |
| char *e; |
| |
| switch (argc) { |
| case 3: |
| port_id = strtoi(argv[1], &e, 0); |
| if (*e || port_id < 0 || port_id >= USB_PORT_COUNT) |
| return EC_ERROR_PARAM1; |
| |
| if (!parse_bool(argv[2], &mode)) |
| return EC_ERROR_PARAM2; |
| |
| usb_port_set_enabled(port_id, mode); |
| /* fallthrough */ |
| case 1: |
| for (i = 0; i < USB_PORT_COUNT; i++) |
| ccprintf("Port %d: %s\n", |
| i, charge_mode[i] ? "on" : "off"); |
| return EC_SUCCESS; |
| } |
| |
| return EC_ERROR_PARAM_COUNT; |
| } |
| DECLARE_CONSOLE_COMMAND(usbchargemode, command_set_mode, |
| "[<port> <on | off>]", |
| "Set USB charge mode"); |
| |
| |
| /*****************************************************************************/ |
| /* Hooks */ |
| |
| static void usb_port_preserve_state(void) |
| { |
| system_add_jump_tag(USB_SYSJUMP_TAG, USB_HOOK_VERSION, |
| sizeof(charge_mode), charge_mode); |
| } |
| DECLARE_HOOK(HOOK_SYSJUMP, usb_port_preserve_state, HOOK_PRIO_DEFAULT); |
| |
| static void usb_port_init(void) |
| { |
| const uint8_t *prev; |
| int version, size, i; |
| |
| prev = (const uint8_t *)system_get_jump_tag(USB_SYSJUMP_TAG, |
| &version, &size); |
| if (!prev || version != USB_HOOK_VERSION || |
| size != sizeof(charge_mode)) { |
| usb_port_all_ports_off(); |
| return; |
| } |
| |
| for (i = 0; i < USB_PORT_COUNT; i++) |
| usb_port_set_enabled(i, prev[i]); |
| } |
| DECLARE_HOOK(HOOK_INIT, usb_port_init, HOOK_PRIO_DEFAULT); |
| |
| static void usb_port_resume(void) |
| { |
| /* Turn on USB ports on as we go into S0 from S3 or S5. */ |
| usb_port_all_ports_on(); |
| } |
| DECLARE_HOOK(HOOK_CHIPSET_RESUME, usb_port_resume, HOOK_PRIO_DEFAULT); |
| |
| static void usb_port_shutdown(void) |
| { |
| /* Turn on USB ports off as we go back to S5. */ |
| usb_port_all_ports_off(); |
| } |
| DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, usb_port_shutdown, HOOK_PRIO_DEFAULT); |