| /* 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 |
| |
| #ifndef CONFIG_USB_PORT_POWER_SMART_DEFAULT_MODE |
| #define CONFIG_USB_PORT_POWER_SMART_DEFAULT_MODE USB_CHARGE_MODE_SDP2 |
| #endif |
| |
| static uint8_t charge_mode[CONFIG_USB_PORT_POWER_SMART_PORT_COUNT]; |
| |
| /* GPIOs to enable/disable USB ports. Board specific. */ |
| extern const int usb_port_enable[CONFIG_USB_PORT_POWER_SMART_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) |
| { |
| ASSERT(port_id < CONFIG_USB_PORT_POWER_SMART_PORT_COUNT); |
| gpio_set_level(usb_port_enable[port_id], en); |
| } |
| |
| static void usb_charge_set_ilim(int port_id, int sel) |
| { |
| #if defined(CONFIG_USB_PORT_POWER_SMART_SIMPLE) |
| /* ILIM_SEL signal is shared and inverted */ |
| gpio_set_level(GPIO_USB_ILIM_SEL, !sel); |
| #elif defined(CONFIG_USB_PORT_POWER_SMART_INVERTED) |
| /* ILIM_SEL signal is per-port and active low */ |
| if (port_id == 0) |
| gpio_set_level(GPIO_USB1_ILIM_SEL_L, !sel); |
| else |
| gpio_set_level(GPIO_USB2_ILIM_SEL_L, !sel); |
| #else |
| /* ILIM_SEL is per-port and active high */ |
| if (port_id == 0) |
| gpio_set_level(GPIO_USB1_ILIM_SEL, sel); |
| else |
| gpio_set_level(GPIO_USB2_ILIM_SEL, sel); |
| #endif /* CONFIG_USB_PORT_POWER_SMART_SIMPLE */ |
| } |
| |
| static void usb_charge_all_ports_ctrl(enum usb_charge_mode mode) |
| { |
| int i; |
| |
| for (i = 0; i < CONFIG_USB_PORT_POWER_SMART_PORT_COUNT; i++) |
| usb_charge_set_mode(i, mode); |
| } |
| |
| int usb_charge_set_mode(int port_id, enum usb_charge_mode mode) |
| { |
| CPRINTS("USB charge p%d m%d", port_id, mode); |
| |
| if (port_id >= CONFIG_USB_PORT_POWER_SMART_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; |
| int i; |
| |
| if (argc == 1) { |
| for (i = 0; i < CONFIG_USB_PORT_POWER_SMART_PORT_COUNT; i++) |
| ccprintf("Port %d: %d\n", i, charge_mode[i]); |
| 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 >= CONFIG_USB_PORT_POWER_SMART_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. |
| * 1=Standard downstream port. |
| * 2=Charging downstream port, BC 1.2. |
| * 3=Dedicated charging port, BC 1.2. |
| */ |
| |
| /*****************************************************************************/ |
| /* 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) |
| { |
| system_add_jump_tag(USB_SYSJUMP_TAG, USB_HOOK_VERSION, |
| sizeof(charge_mode), charge_mode); |
| } |
| DECLARE_HOOK(HOOK_SYSJUMP, usb_charge_preserve_state, HOOK_PRIO_DEFAULT); |
| |
| static void usb_charge_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_charge_all_ports_ctrl(USB_CHARGE_MODE_DISABLED); |
| return; |
| } |
| |
| for (i = 0; i < CONFIG_USB_PORT_POWER_SMART_PORT_COUNT; i++) |
| usb_charge_set_mode(i, prev[i]); |
| } |
| 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_ctrl(CONFIG_USB_PORT_POWER_SMART_DEFAULT_MODE); |
| } |
| 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_ctrl(USB_CHARGE_MODE_DISABLED); |
| } |
| DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, usb_charge_shutdown, HOOK_PRIO_DEFAULT); |