diff options
Diffstat (limited to 'board/it83xx_evb/usb_pd_policy.c')
-rw-r--r-- | board/it83xx_evb/usb_pd_policy.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/board/it83xx_evb/usb_pd_policy.c b/board/it83xx_evb/usb_pd_policy.c new file mode 100644 index 0000000000..b1c0fa3014 --- /dev/null +++ b/board/it83xx_evb/usb_pd_policy.c @@ -0,0 +1,335 @@ +/* Copyright 2016 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 "adc.h" +#include "config.h" +#include "common.h" +#include "console.h" +#include "gpio.h" +#include "hooks.h" +#include "registers.h" +#include "system.h" +#include "task.h" +#include "timer.h" +#include "util.h" +#include "usb_mux.h" + +#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args) +#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) + +#define PDO_FIXED_FLAGS (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |\ + PDO_FIXED_EXTERNAL | PDO_FIXED_COMM_CAP) + +/* Threshold voltage of VBUS provided (mV) */ +#define PD_VBUS_PROVIDED_THRESHOLD 3900 + +const uint32_t pd_src_pdo[] = { + PDO_FIXED(5000, 1500, PDO_FIXED_FLAGS), +}; +const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo); + +const uint32_t pd_snk_pdo[] = { + PDO_FIXED(5000, 500, PDO_FIXED_FLAGS), + PDO_BATT(4500, 14000, 10000), + PDO_VAR(4500, 14000, 3000), +}; +const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo); + +void pd_set_input_current_limit(int port, uint32_t max_ma, + uint32_t supply_voltage) +{ +} + +void typec_set_input_current_limit(int port, uint32_t max_ma, + uint32_t supply_voltage) +{ +} + +int pd_is_max_request_allowed(void) +{ + /* max voltage request allowed */ + return 1; +} + +int pd_is_valid_input_voltage(int mv) +{ + /* Any voltage less than the max is allowed */ + return 1; +} + +void pd_transition_voltage(int idx) +{ + /* No-operation: we are always 5V */ +} + +int pd_snk_is_vbus_provided(int port) +{ + int mv = adc_read_channel(port == USBPD_PORT_A ? + ADC_VBUSSA : ADC_VBUSSB); + + /* level shift voltage of VBUS > threshold */ + return (mv * 23 / 3) > PD_VBUS_PROVIDED_THRESHOLD; +} + +int pd_set_power_supply_ready(int port) +{ + /* provide VBUS */ + board_pd_vbus_ctrl(port, 1); + /* vbus provided or not */ + return !pd_snk_is_vbus_provided(port); +} + +void pd_power_supply_reset(int port) +{ + /* Kill VBUS */ + board_pd_vbus_ctrl(port, 0); +} + +int pd_board_checks(void) +{ + return EC_SUCCESS; +} + +int pd_check_power_swap(int port) +{ + /* TODO: use battery level to decide to accept/reject power swap + * Allow power swap as long as we are acting as a dual role device, + * otherwise assume our role is fixed (not in S0 or console command + * to fix our role). + */ + return pd_get_dual_role() == PD_DRP_TOGGLE_ON ? 1 : 0; +} + +int pd_check_data_swap(int port, int data_role) +{ + /* Always allow data swap: we can be DFP or UFP for USB */ + return 1; +} + +int pd_check_vconn_swap(int port) +{ + /* + * VCONN is provided directly by the battery(PPVAR_SYS) + * but use the same rules as power swap + */ + return pd_get_dual_role() == PD_DRP_TOGGLE_ON ? 1 : 0; +} + +void pd_execute_data_swap(int port, int data_role) +{ +} + +void pd_check_pr_role(int port, int pr_role, int flags) +{ + /* + * If partner is dual-role power and dualrole toggling is on, consider + * if a power swap is necessary. + */ + if ((flags & PD_FLAGS_PARTNER_DR_POWER) && + pd_get_dual_role() == PD_DRP_TOGGLE_ON) { + /* + * If we are source and partner is externally powered, + * swap to become a sink. + */ + if ((flags & PD_FLAGS_PARTNER_EXTPOWER) && + pr_role == PD_ROLE_SOURCE) + pd_request_power_swap(port); + } +} + +void pd_check_dr_role(int port, int dr_role, int flags) +{ + /* if the partner is a DRP (e.g. laptop), try to switch to UFP */ + if ((flags & PD_FLAGS_PARTNER_DR_DATA) && dr_role == PD_ROLE_DFP) + pd_request_data_swap(port); +} + +/* ----------------- Vendor Defined Messages ------------------ */ +const struct svdm_response svdm_rsp = { + .identity = NULL, + .svids = NULL, + .modes = NULL, +}; + +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; + int is_rw; + + /* 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: + /* copy hash */ + if (cnt == 7) { + dev_id = VDO_INFO_HW_DEV_ID(payload[6]); + is_rw = VDO_INFO_IS_RW(payload[6]); + + CPRINTF("DevId:%d.%d SW:%d RW:%d\n", + HW_DEV_ID_MAJ(dev_id), + HW_DEV_ID_MIN(dev_id), + VDO_INFO_SW_DBG_VER(payload[6]), + is_rw); + } else if (cnt == 6) { + /* really old devices don't have last byte */ + pd_dev_store_rw_hash(port, dev_id, payload + 1, + SYSTEM_IMAGE_UNKNOWN); + } + break; + case VDO_CMD_CURRENT: + CPRINTF("Current: %dmA\n", payload[1]); + break; + case VDO_CMD_FLIP: + /* usb_mux_flip(port); */ + break; +#ifdef CONFIG_USB_PD_LOGGING + case VDO_CMD_GET_LOG: + pd_log_recv_vdm(port, cnt, payload); + break; +#endif /* CONFIG_USB_PD_LOGGING */ + } + + return 0; +} + +#ifdef CONFIG_USB_PD_ALT_MODE_DFP +static int dp_flags[CONFIG_USB_PD_PORT_COUNT]; +/* DP Status VDM as returned by UFP */ +static uint32_t dp_status[CONFIG_USB_PD_PORT_COUNT]; + +static void svdm_safe_dp_mode(int port) +{ + /* make DP interface safe until configure */ + dp_flags[port] = 0; + dp_status[port] = 0; + /* usb_mux_set(port, TYPEC_MUX_NONE, + USB_SWITCH_CONNECT, pd_get_polarity(port)); */ +} + +static int svdm_enter_dp_mode(int port, uint32_t mode_caps) +{ + /* Only enter mode if device is DFP_D capable */ + if (mode_caps & MODE_DP_SNK) { + svdm_safe_dp_mode(port); + return 0; + } + + return -1; +} + +static int svdm_dp_status(int port, uint32_t *payload) +{ + int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT); + + payload[0] = VDO(USB_SID_DISPLAYPORT, 1, + CMD_DP_STATUS | VDO_OPOS(opos)); + payload[1] = VDO_DP_STATUS(0, /* HPD IRQ ... not applicable */ + 0, /* HPD level ... not applicable */ + 0, /* exit DP? ... no */ + 0, /* usb mode? ... no */ + 0, /* multi-function ... no */ + (!!(dp_flags[port] & DP_FLAGS_DP_ON)), + 0, /* power low? ... no */ + (!!(dp_flags[port] & DP_FLAGS_DP_ON))); + return 2; +}; + +static int svdm_dp_config(int port, uint32_t *payload) +{ + int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT); + /* int mf_pref = PD_VDO_DPSTS_MF_PREF(dp_status[port]); */ + int pin_mode = pd_dfp_dp_get_pin_mode(port, dp_status[port]); + + if (!pin_mode) + return 0; + + /* usb_mux_set(port, mf_pref ? TYPEC_MUX_DOCK : TYPEC_MUX_DP, + USB_SWITCH_CONNECT, pd_get_polarity(port)); */ + + payload[0] = VDO(USB_SID_DISPLAYPORT, 1, + CMD_DP_CONFIG | VDO_OPOS(opos)); + payload[1] = VDO_DP_CFG(pin_mode, /* pin mode */ + 1, /* DPv1.3 signaling */ + 2); /* UFP connected */ + return 2; +}; + +static void svdm_dp_post_config(int port) +{ + /* TODO: Figure out HPD */ +} + +static int svdm_dp_attention(int port, uint32_t *payload) +{ + /* TODO: Figure out HPD */ + return 1; +} + +static void svdm_exit_dp_mode(int port) +{ + /* TODO: Figure out HPD */ +} + +static int svdm_enter_gfu_mode(int port, uint32_t mode_caps) +{ + /* Always enter GFU mode */ + return 0; +} + +static void svdm_exit_gfu_mode(int port) +{ +} + +static int svdm_gfu_status(int port, uint32_t *payload) +{ + /* + * This is called after enter mode is successful, send unstructured + * VDM to read info. + */ + pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_READ_INFO, NULL, 0); + return 0; +} + +static int svdm_gfu_config(int port, uint32_t *payload) +{ + return 0; +} + +static int svdm_gfu_attention(int port, uint32_t *payload) +{ + return 0; +} + +const struct svdm_amode_fx supported_modes[] = { + { + .svid = USB_SID_DISPLAYPORT, + .enter = &svdm_enter_dp_mode, + .status = &svdm_dp_status, + .config = &svdm_dp_config, + .post_config = &svdm_dp_post_config, + .attention = &svdm_dp_attention, + .exit = &svdm_exit_dp_mode, + }, + { + .svid = USB_VID_GOOGLE, + .enter = &svdm_enter_gfu_mode, + .status = &svdm_gfu_status, + .config = &svdm_gfu_config, + .attention = &svdm_gfu_attention, + .exit = &svdm_exit_gfu_mode, + } +}; +const int supported_modes_cnt = ARRAY_SIZE(supported_modes); +#endif /* CONFIG_USB_PD_ALT_MODE_DFP */ |