| /* Copyright (c) 2016-2017, Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/completion.h> |
| #include <linux/delay.h> |
| #include <linux/hrtimer.h> |
| #include <linux/ipc_logging.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/of_platform.h> |
| #include <linux/power_supply.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/workqueue.h> |
| #include <linux/extcon.h> |
| #include <linux/usb/class-dual-role.h> |
| #include <linux/usb/usbpd.h> |
| #include "usbpd.h" |
| |
| /* To start USB stack for USB3.1 complaince testing */ |
| static bool usb_compliance_mode; |
| module_param(usb_compliance_mode, bool, 0644); |
| MODULE_PARM_DESC(usb_compliance_mode, "Start USB stack for USB3.1 compliance testing"); |
| |
| static bool disable_usb_pd; |
| module_param(disable_usb_pd, bool, 0644); |
| MODULE_PARM_DESC(disable_usb_pd, "Disable USB PD for USB3.1 compliance testing"); |
| |
| enum usbpd_state { |
| PE_UNKNOWN, |
| PE_ERROR_RECOVERY, |
| PE_SRC_DISABLED, |
| PE_SRC_STARTUP, |
| PE_SRC_SEND_CAPABILITIES, |
| PE_SRC_SEND_CAPABILITIES_WAIT, /* substate to wait for Request */ |
| PE_SRC_NEGOTIATE_CAPABILITY, |
| PE_SRC_TRANSITION_SUPPLY, |
| PE_SRC_READY, |
| PE_SRC_HARD_RESET, |
| PE_SRC_SOFT_RESET, |
| PE_SRC_SEND_SOFT_RESET, |
| PE_SRC_DISCOVERY, |
| PE_SRC_TRANSITION_TO_DEFAULT, |
| PE_SNK_STARTUP, |
| PE_SNK_DISCOVERY, |
| PE_SNK_WAIT_FOR_CAPABILITIES, |
| PE_SNK_EVALUATE_CAPABILITY, |
| PE_SNK_SELECT_CAPABILITY, |
| PE_SNK_TRANSITION_SINK, |
| PE_SNK_READY, |
| PE_SNK_HARD_RESET, |
| PE_SNK_SOFT_RESET, |
| PE_SNK_SEND_SOFT_RESET, |
| PE_SNK_TRANSITION_TO_DEFAULT, |
| PE_DRS_SEND_DR_SWAP, |
| PE_PRS_SNK_SRC_SEND_SWAP, |
| PE_PRS_SNK_SRC_TRANSITION_TO_OFF, |
| PE_PRS_SNK_SRC_SOURCE_ON, |
| PE_PRS_SRC_SNK_SEND_SWAP, |
| PE_PRS_SRC_SNK_TRANSITION_TO_OFF, |
| PE_PRS_SRC_SNK_WAIT_SOURCE_ON, |
| PE_VCS_WAIT_FOR_VCONN, |
| }; |
| |
| static const char * const usbpd_state_strings[] = { |
| "UNKNOWN", |
| "ERROR_RECOVERY", |
| "SRC_Disabled", |
| "SRC_Startup", |
| "SRC_Send_Capabilities", |
| "SRC_Send_Capabilities (Wait for Request)", |
| "SRC_Negotiate_Capability", |
| "SRC_Transition_Supply", |
| "SRC_Ready", |
| "SRC_Hard_Reset", |
| "SRC_Soft_Reset", |
| "SRC_Send_Soft_Reset", |
| "SRC_Discovery", |
| "SRC_Transition_to_default", |
| "SNK_Startup", |
| "SNK_Discovery", |
| "SNK_Wait_for_Capabilities", |
| "SNK_Evaluate_Capability", |
| "SNK_Select_Capability", |
| "SNK_Transition_Sink", |
| "SNK_Ready", |
| "SNK_Hard_Reset", |
| "SNK_Soft_Reset", |
| "SNK_Send_Soft_Reset", |
| "SNK_Transition_to_default", |
| "DRS_Send_DR_Swap", |
| "PRS_SNK_SRC_Send_Swap", |
| "PRS_SNK_SRC_Transition_to_off", |
| "PRS_SNK_SRC_Source_on", |
| "PRS_SRC_SNK_Send_Swap", |
| "PRS_SRC_SNK_Transition_to_off", |
| "PRS_SRC_SNK_Wait_Source_on", |
| "VCS_Wait_for_VCONN", |
| }; |
| |
| enum usbpd_control_msg_type { |
| MSG_RESERVED = 0, |
| MSG_GOODCRC, |
| MSG_GOTOMIN, |
| MSG_ACCEPT, |
| MSG_REJECT, |
| MSG_PING, |
| MSG_PS_RDY, |
| MSG_GET_SOURCE_CAP, |
| MSG_GET_SINK_CAP, |
| MSG_DR_SWAP, |
| MSG_PR_SWAP, |
| MSG_VCONN_SWAP, |
| MSG_WAIT, |
| MSG_SOFT_RESET, |
| }; |
| |
| enum usbpd_data_msg_type { |
| MSG_SOURCE_CAPABILITIES = 1, |
| MSG_REQUEST, |
| MSG_BIST, |
| MSG_SINK_CAPABILITIES, |
| MSG_VDM = 0xF, |
| }; |
| |
| enum vdm_state { |
| VDM_NONE, |
| DISCOVERED_ID, |
| DISCOVERED_SVIDS, |
| DISCOVERED_MODES, |
| MODE_ENTERED, |
| MODE_EXITED, |
| }; |
| |
| static void *usbpd_ipc_log; |
| #define usbpd_dbg(dev, fmt, ...) do { \ |
| ipc_log_string(usbpd_ipc_log, "%s: %s: " fmt, dev_name(dev), __func__, \ |
| ##__VA_ARGS__); \ |
| dev_dbg(dev, fmt, ##__VA_ARGS__); \ |
| } while (0) |
| |
| #define usbpd_info(dev, fmt, ...) do { \ |
| ipc_log_string(usbpd_ipc_log, "%s: %s: " fmt, dev_name(dev), __func__, \ |
| ##__VA_ARGS__); \ |
| dev_info(dev, fmt, ##__VA_ARGS__); \ |
| } while (0) |
| |
| #define usbpd_warn(dev, fmt, ...) do { \ |
| ipc_log_string(usbpd_ipc_log, "%s: %s: " fmt, dev_name(dev), __func__, \ |
| ##__VA_ARGS__); \ |
| dev_warn(dev, fmt, ##__VA_ARGS__); \ |
| } while (0) |
| |
| #define usbpd_err(dev, fmt, ...) do { \ |
| ipc_log_string(usbpd_ipc_log, "%s: %s: " fmt, dev_name(dev), __func__, \ |
| ##__VA_ARGS__); \ |
| dev_err(dev, fmt, ##__VA_ARGS__); \ |
| } while (0) |
| |
| #define NUM_LOG_PAGES 10 |
| |
| /* Timeouts (in ms) */ |
| #define ERROR_RECOVERY_TIME 25 |
| #define SENDER_RESPONSE_TIME 26 |
| #define SINK_WAIT_CAP_TIME 500 |
| #define PS_TRANSITION_TIME 450 |
| #define SRC_CAP_TIME 120 |
| #define SRC_TRANSITION_TIME 25 |
| #define SRC_RECOVER_TIME 750 |
| #define PS_HARD_RESET_TIME 25 |
| #define PS_SOURCE_ON 400 |
| #define PS_SOURCE_OFF 750 |
| #define FIRST_SOURCE_CAP_TIME 200 |
| #define VDM_BUSY_TIME 50 |
| #define VCONN_ON_TIME 100 |
| |
| /* tPSHardReset + tSafe0V */ |
| #define SNK_HARD_RESET_VBUS_OFF_TIME (35 + 650) |
| |
| /* tSrcRecover + tSrcTurnOn */ |
| #define SNK_HARD_RESET_VBUS_ON_TIME (1000 + 275) |
| |
| #define PD_CAPS_COUNT 50 |
| |
| #define PD_MAX_MSG_ID 7 |
| |
| #define PD_MAX_DATA_OBJ 7 |
| |
| #define PD_MSG_HDR(type, dr, pr, id, cnt, rev) \ |
| (((type) & 0xF) | ((dr) << 5) | (rev << 6) | \ |
| ((pr) << 8) | ((id) << 9) | ((cnt) << 12)) |
| #define PD_MSG_HDR_COUNT(hdr) (((hdr) >> 12) & 7) |
| #define PD_MSG_HDR_TYPE(hdr) ((hdr) & 0xF) |
| #define PD_MSG_HDR_ID(hdr) (((hdr) >> 9) & 7) |
| #define PD_MSG_HDR_REV(hdr) (((hdr) >> 6) & 3) |
| |
| #define PD_RDO_FIXED(obj, gb, mismatch, usb_comm, no_usb_susp, curr1, curr2) \ |
| (((obj) << 28) | ((gb) << 27) | ((mismatch) << 26) | \ |
| ((usb_comm) << 25) | ((no_usb_susp) << 24) | \ |
| ((curr1) << 10) | (curr2)) |
| |
| #define PD_RDO_AUGMENTED(obj, mismatch, usb_comm, no_usb_susp, volt, curr) \ |
| (((obj) << 28) | ((mismatch) << 26) | ((usb_comm) << 25) | \ |
| ((no_usb_susp) << 24) | ((volt) << 9) | (curr)) |
| |
| #define PD_RDO_OBJ_POS(rdo) ((rdo) >> 28 & 7) |
| #define PD_RDO_GIVEBACK(rdo) ((rdo) >> 27 & 1) |
| #define PD_RDO_MISMATCH(rdo) ((rdo) >> 26 & 1) |
| #define PD_RDO_USB_COMM(rdo) ((rdo) >> 25 & 1) |
| #define PD_RDO_NO_USB_SUSP(rdo) ((rdo) >> 24 & 1) |
| #define PD_RDO_FIXED_CURR(rdo) ((rdo) >> 10 & 0x3FF) |
| #define PD_RDO_FIXED_CURR_MINMAX(rdo) ((rdo) & 0x3FF) |
| #define PD_RDO_PROG_VOLTAGE(rdo) ((rdo) >> 9 & 0x7FF) |
| #define PD_RDO_PROG_CURR(rdo) ((rdo) & 0x7F) |
| |
| #define PD_SRC_PDO_TYPE(pdo) (((pdo) >> 30) & 3) |
| #define PD_SRC_PDO_TYPE_FIXED 0 |
| #define PD_SRC_PDO_TYPE_BATTERY 1 |
| #define PD_SRC_PDO_TYPE_VARIABLE 2 |
| #define PD_SRC_PDO_TYPE_AUGMENTED 3 |
| |
| #define PD_SRC_PDO_FIXED_PR_SWAP(pdo) (((pdo) >> 29) & 1) |
| #define PD_SRC_PDO_FIXED_USB_SUSP(pdo) (((pdo) >> 28) & 1) |
| #define PD_SRC_PDO_FIXED_EXT_POWERED(pdo) (((pdo) >> 27) & 1) |
| #define PD_SRC_PDO_FIXED_USB_COMM(pdo) (((pdo) >> 26) & 1) |
| #define PD_SRC_PDO_FIXED_DR_SWAP(pdo) (((pdo) >> 25) & 1) |
| #define PD_SRC_PDO_FIXED_PEAK_CURR(pdo) (((pdo) >> 20) & 3) |
| #define PD_SRC_PDO_FIXED_VOLTAGE(pdo) (((pdo) >> 10) & 0x3FF) |
| #define PD_SRC_PDO_FIXED_MAX_CURR(pdo) ((pdo) & 0x3FF) |
| |
| #define PD_SRC_PDO_VAR_BATT_MAX_VOLT(pdo) (((pdo) >> 20) & 0x3FF) |
| #define PD_SRC_PDO_VAR_BATT_MIN_VOLT(pdo) (((pdo) >> 10) & 0x3FF) |
| #define PD_SRC_PDO_VAR_BATT_MAX(pdo) ((pdo) & 0x3FF) |
| |
| #define PD_APDO_PPS(pdo) (((pdo) >> 28) & 3) |
| #define PD_APDO_MAX_VOLT(pdo) (((pdo) >> 17) & 0xFF) |
| #define PD_APDO_MIN_VOLT(pdo) (((pdo) >> 8) & 0xFF) |
| #define PD_APDO_MAX_CURR(pdo) ((pdo) & 0x7F) |
| |
| /* Vendor Defined Messages */ |
| #define MAX_CRC_RECEIVE_TIME 9 /* ~(2 * tReceive_max(1.1ms) * # retry 4) */ |
| #define MAX_VDM_RESPONSE_TIME 60 /* 2 * tVDMSenderResponse_max(30ms) */ |
| #define MAX_VDM_BUSY_TIME 100 /* 2 * tVDMBusy (50ms) */ |
| |
| #define PD_SNK_PDO_FIXED(prs, hc, uc, usb_comm, drs, volt, curr) \ |
| (((prs) << 29) | ((hc) << 28) | ((uc) << 27) | ((usb_comm) << 26) | \ |
| ((drs) << 25) | ((volt) << 10) | (curr)) |
| |
| /* VDM header is the first 32-bit object following the 16-bit PD header */ |
| #define VDM_HDR_SVID(hdr) ((hdr) >> 16) |
| #define VDM_IS_SVDM(hdr) ((hdr) & 0x8000) |
| #define SVDM_HDR_OBJ_POS(hdr) (((hdr) >> 8) & 0x7) |
| #define SVDM_HDR_CMD_TYPE(hdr) (((hdr) >> 6) & 0x3) |
| #define SVDM_HDR_CMD(hdr) ((hdr) & 0x1f) |
| |
| #define SVDM_HDR(svid, ver, obj, cmd_type, cmd) \ |
| (((svid) << 16) | (1 << 15) | ((ver) << 13) \ |
| | ((obj) << 8) | ((cmd_type) << 6) | (cmd)) |
| |
| /* discover id response vdo bit fields */ |
| #define ID_HDR_USB_HOST BIT(31) |
| #define ID_HDR_USB_DEVICE BIT(30) |
| #define ID_HDR_MODAL_OPR BIT(26) |
| #define ID_HDR_PRODUCT_TYPE(n) ((n) >> 27) |
| #define ID_HDR_PRODUCT_PER_MASK (2 << 27) |
| #define ID_HDR_PRODUCT_HUB 1 |
| #define ID_HDR_PRODUCT_PER 2 |
| #define ID_HDR_PRODUCT_AMA 5 |
| #define ID_HDR_VID 0x05c6 /* qcom */ |
| #define PROD_VDO_PID 0x0a00 /* TBD */ |
| |
| static bool check_vsafe0v = true; |
| module_param(check_vsafe0v, bool, 0600); |
| |
| static int min_sink_current = 900; |
| module_param(min_sink_current, int, 0600); |
| |
| static const u32 default_src_caps[] = { 0x36019096 }; /* VSafe5V @ 1.5A */ |
| static const u32 default_snk_caps[] = { 0x2601912C }; /* VSafe5V @ 3A */ |
| |
| struct vdm_tx { |
| u32 data[7]; |
| int size; |
| }; |
| |
| struct rx_msg { |
| u8 type; |
| u8 len; |
| u32 payload[7]; |
| struct list_head entry; |
| }; |
| |
| #define IS_DATA(m, t) ((m) && ((m)->len) && ((m)->type == (t))) |
| #define IS_CTRL(m, t) ((m) && !((m)->len) && ((m)->type == (t))) |
| |
| struct usbpd { |
| struct device dev; |
| struct workqueue_struct *wq; |
| struct work_struct sm_work; |
| struct hrtimer timer; |
| bool sm_queued; |
| |
| struct extcon_dev *extcon; |
| |
| enum usbpd_state current_state; |
| bool hard_reset_recvd; |
| struct list_head rx_q; |
| spinlock_t rx_lock; |
| |
| u32 received_pdos[PD_MAX_DATA_OBJ]; |
| u16 src_cap_id; |
| u8 selected_pdo; |
| u8 requested_pdo; |
| u32 rdo; /* can be either source or sink */ |
| int current_voltage; /* uV */ |
| int requested_voltage; /* uV */ |
| int requested_current; /* mA */ |
| bool pd_connected; |
| bool in_explicit_contract; |
| bool peer_usb_comm; |
| bool peer_pr_swap; |
| bool peer_dr_swap; |
| |
| u32 sink_caps[7]; |
| int num_sink_caps; |
| |
| struct power_supply *usb_psy; |
| struct notifier_block psy_nb; |
| |
| enum power_supply_typec_mode typec_mode; |
| enum power_supply_type psy_type; |
| enum power_supply_typec_power_role forced_pr; |
| bool vbus_present; |
| |
| enum pd_spec_rev spec_rev; |
| enum data_role current_dr; |
| enum power_role current_pr; |
| bool in_pr_swap; |
| bool pd_phy_opened; |
| bool send_request; |
| struct completion is_ready; |
| |
| struct mutex swap_lock; |
| struct dual_role_phy_instance *dual_role; |
| struct dual_role_phy_desc dr_desc; |
| bool send_pr_swap; |
| bool send_dr_swap; |
| |
| struct regulator *vbus; |
| struct regulator *vconn; |
| bool vbus_enabled; |
| bool vconn_enabled; |
| bool vconn_is_external; |
| |
| u8 tx_msgid; |
| u8 rx_msgid; |
| int caps_count; |
| int hard_reset_count; |
| |
| enum vdm_state vdm_state; |
| u16 *discovered_svids; |
| int num_svids; |
| struct vdm_tx *vdm_tx; |
| struct vdm_tx *vdm_tx_retry; |
| struct list_head svid_handlers; |
| |
| struct list_head instance; |
| }; |
| |
| static LIST_HEAD(_usbpd); /* useful for debugging */ |
| |
| static const unsigned int usbpd_extcon_cable[] = { |
| EXTCON_USB, |
| EXTCON_USB_HOST, |
| EXTCON_NONE, |
| }; |
| |
| /* EXTCON_USB and EXTCON_USB_HOST are mutually exclusive */ |
| static const u32 usbpd_extcon_exclusive[] = {0x3, 0}; |
| |
| enum plug_orientation usbpd_get_plug_orientation(struct usbpd *pd) |
| { |
| int ret; |
| union power_supply_propval val; |
| |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_TYPEC_CC_ORIENTATION, &val); |
| if (ret) |
| return ORIENTATION_NONE; |
| |
| return val.intval; |
| } |
| EXPORT_SYMBOL(usbpd_get_plug_orientation); |
| |
| static inline void stop_usb_host(struct usbpd *pd) |
| { |
| extcon_set_state_sync(pd->extcon, EXTCON_USB_HOST, 0); |
| } |
| |
| static inline void start_usb_host(struct usbpd *pd, bool ss) |
| { |
| enum plug_orientation cc = usbpd_get_plug_orientation(pd); |
| union extcon_property_value val; |
| |
| val.intval = (cc == ORIENTATION_CC2); |
| extcon_set_property(pd->extcon, EXTCON_USB_HOST, |
| EXTCON_PROP_USB_TYPEC_POLARITY, val); |
| |
| val.intval = ss; |
| extcon_set_property(pd->extcon, EXTCON_USB_HOST, |
| EXTCON_PROP_USB_SS, val); |
| |
| extcon_set_state_sync(pd->extcon, EXTCON_USB_HOST, 1); |
| } |
| |
| static inline void stop_usb_peripheral(struct usbpd *pd) |
| { |
| extcon_set_state_sync(pd->extcon, EXTCON_USB, 0); |
| } |
| |
| static inline void start_usb_peripheral(struct usbpd *pd) |
| { |
| enum plug_orientation cc = usbpd_get_plug_orientation(pd); |
| union extcon_property_value val; |
| |
| val.intval = (cc == ORIENTATION_CC2); |
| extcon_set_property(pd->extcon, EXTCON_USB, |
| EXTCON_PROP_USB_TYPEC_POLARITY, val); |
| |
| val.intval = 1; |
| extcon_set_property(pd->extcon, EXTCON_USB, EXTCON_PROP_USB_SS, val); |
| |
| extcon_set_state_sync(pd->extcon, EXTCON_USB, 1); |
| } |
| |
| static int set_power_role(struct usbpd *pd, enum power_role pr) |
| { |
| union power_supply_propval val = {0}; |
| |
| switch (pr) { |
| case PR_NONE: |
| val.intval = POWER_SUPPLY_TYPEC_PR_NONE; |
| break; |
| case PR_SINK: |
| val.intval = POWER_SUPPLY_TYPEC_PR_SINK; |
| break; |
| case PR_SRC: |
| val.intval = POWER_SUPPLY_TYPEC_PR_SOURCE; |
| break; |
| } |
| |
| return power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_TYPEC_POWER_ROLE, &val); |
| } |
| |
| static struct usbpd_svid_handler *find_svid_handler(struct usbpd *pd, u16 svid) |
| { |
| struct usbpd_svid_handler *handler; |
| |
| list_for_each_entry(handler, &pd->svid_handlers, entry) |
| if (svid == handler->svid) |
| return handler; |
| |
| return NULL; |
| } |
| |
| /* Reset protocol layer */ |
| static inline void pd_reset_protocol(struct usbpd *pd) |
| { |
| /* |
| * first Rx ID should be 0; set this to a sentinel of -1 so that in |
| * phy_msg_received() we can check if we had seen it before. |
| */ |
| pd->rx_msgid = -1; |
| pd->tx_msgid = 0; |
| pd->send_request = false; |
| pd->send_pr_swap = false; |
| pd->send_dr_swap = false; |
| } |
| |
| static int pd_send_msg(struct usbpd *pd, u8 hdr_type, const u32 *data, |
| size_t num_data, enum pd_msg_type type) |
| { |
| int ret; |
| u16 hdr; |
| |
| hdr = PD_MSG_HDR(hdr_type, pd->current_dr, pd->current_pr, |
| pd->tx_msgid, num_data, pd->spec_rev); |
| ret = pd_phy_write(hdr, (u8 *)data, num_data * sizeof(u32), type, 15); |
| /* TODO figure out timeout. based on tReceive=1.1ms x nRetryCount? */ |
| |
| if (ret < 0) |
| return ret; |
| else if (ret != num_data * sizeof(u32)) |
| return -EIO; |
| |
| pd->tx_msgid = (pd->tx_msgid + 1) & PD_MAX_MSG_ID; |
| return 0; |
| } |
| |
| static int pd_select_pdo(struct usbpd *pd, int pdo_pos, int uv, int ua) |
| { |
| int curr; |
| int max_current; |
| bool mismatch = false; |
| u8 type; |
| u32 pdo = pd->received_pdos[pdo_pos - 1]; |
| |
| type = PD_SRC_PDO_TYPE(pdo); |
| if (type == PD_SRC_PDO_TYPE_FIXED) { |
| curr = max_current = PD_SRC_PDO_FIXED_MAX_CURR(pdo) * 10; |
| |
| /* |
| * Check if the PDO has enough current, otherwise set the |
| * Capability Mismatch flag |
| */ |
| if (curr < min_sink_current) { |
| mismatch = true; |
| max_current = min_sink_current; |
| } |
| |
| pd->requested_voltage = |
| PD_SRC_PDO_FIXED_VOLTAGE(pdo) * 50 * 1000; |
| pd->rdo = PD_RDO_FIXED(pdo_pos, 0, mismatch, 1, 1, curr / 10, |
| max_current / 10); |
| } else if (type == PD_SRC_PDO_TYPE_AUGMENTED) { |
| if ((uv / 100000) > PD_APDO_MAX_VOLT(pdo) || |
| (uv / 100000) < PD_APDO_MIN_VOLT(pdo) || |
| (ua / 50000) > PD_APDO_MAX_CURR(pdo) || (ua < 0)) { |
| usbpd_err(&pd->dev, "uv (%d) and ua (%d) out of range of APDO\n", |
| uv, ua); |
| return -EINVAL; |
| } |
| |
| curr = ua / 1000; |
| pd->requested_voltage = uv; |
| pd->rdo = PD_RDO_AUGMENTED(pdo_pos, mismatch, 1, 1, |
| uv / 20000, ua / 50000); |
| } else { |
| usbpd_err(&pd->dev, "Only Fixed or Programmable PDOs supported\n"); |
| return -ENOTSUPP; |
| } |
| |
| /* Can't sink more than 5V if VCONN is sourced from the VBUS input */ |
| if (pd->vconn_enabled && !pd->vconn_is_external && |
| pd->requested_voltage > 5000000) |
| return -ENOTSUPP; |
| |
| pd->requested_current = curr; |
| pd->requested_pdo = pdo_pos; |
| |
| return 0; |
| } |
| |
| static int pd_eval_src_caps(struct usbpd *pd) |
| { |
| int obj_cnt; |
| union power_supply_propval val; |
| u32 first_pdo = pd->received_pdos[0]; |
| |
| if (PD_SRC_PDO_TYPE(first_pdo) != PD_SRC_PDO_TYPE_FIXED) { |
| usbpd_err(&pd->dev, "First src_cap invalid! %08x\n", first_pdo); |
| return -EINVAL; |
| } |
| |
| pd->peer_usb_comm = PD_SRC_PDO_FIXED_USB_COMM(first_pdo); |
| pd->peer_pr_swap = PD_SRC_PDO_FIXED_PR_SWAP(first_pdo); |
| pd->peer_dr_swap = PD_SRC_PDO_FIXED_DR_SWAP(first_pdo); |
| |
| val.intval = PD_SRC_PDO_FIXED_USB_SUSP(first_pdo); |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_USB_SUSPEND_SUPPORTED, &val); |
| |
| for (obj_cnt = 1; obj_cnt < PD_MAX_DATA_OBJ; obj_cnt++) { |
| if ((PD_SRC_PDO_TYPE(pd->received_pdos[obj_cnt]) == |
| PD_SRC_PDO_TYPE_AUGMENTED) && |
| !PD_APDO_PPS(pd->received_pdos[obj_cnt])) |
| pd->spec_rev = USBPD_REV_30; |
| } |
| |
| /* Select the first PDO (vSafe5V) immediately. */ |
| pd_select_pdo(pd, 1, 0, 0); |
| |
| return 0; |
| } |
| |
| static void pd_send_hard_reset(struct usbpd *pd) |
| { |
| union power_supply_propval val = {0}; |
| |
| usbpd_dbg(&pd->dev, "send hard reset"); |
| |
| /* Force CC logic to source/sink to keep Rp/Rd unchanged */ |
| set_power_role(pd, pd->current_pr); |
| pd->hard_reset_count++; |
| pd_phy_signal(HARD_RESET_SIG, 5); /* tHardResetComplete */ |
| pd->in_pr_swap = false; |
| power_supply_set_property(pd->usb_psy, POWER_SUPPLY_PROP_PR_SWAP, &val); |
| } |
| |
| static void kick_sm(struct usbpd *pd, int ms) |
| { |
| pm_stay_awake(&pd->dev); |
| pd->sm_queued = true; |
| |
| if (ms) |
| hrtimer_start(&pd->timer, ms_to_ktime(ms), HRTIMER_MODE_REL); |
| else |
| queue_work(pd->wq, &pd->sm_work); |
| } |
| |
| static void phy_sig_received(struct usbpd *pd, enum pd_sig_type type) |
| { |
| union power_supply_propval val = {1}; |
| |
| if (type != HARD_RESET_SIG) { |
| usbpd_err(&pd->dev, "invalid signal (%d) received\n", type); |
| return; |
| } |
| |
| usbpd_dbg(&pd->dev, "hard reset received\n"); |
| |
| /* Force CC logic to source/sink to keep Rp/Rd unchanged */ |
| set_power_role(pd, pd->current_pr); |
| pd->hard_reset_recvd = true; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, &val); |
| |
| kick_sm(pd, 0); |
| } |
| |
| static void phy_msg_received(struct usbpd *pd, enum pd_msg_type type, |
| u8 *buf, size_t len) |
| { |
| struct rx_msg *rx_msg; |
| unsigned long flags; |
| u16 header; |
| |
| if (type != SOP_MSG) { |
| usbpd_err(&pd->dev, "invalid msg type (%d) received; only SOP supported\n", |
| type); |
| return; |
| } |
| |
| if (len < 2) { |
| usbpd_err(&pd->dev, "invalid message received, len=%zd\n", len); |
| return; |
| } |
| |
| header = *((u16 *)buf); |
| buf += sizeof(u16); |
| len -= sizeof(u16); |
| |
| if (len % 4 != 0) { |
| usbpd_err(&pd->dev, "len=%zd not multiple of 4\n", len); |
| return; |
| } |
| |
| /* if MSGID already seen, discard */ |
| if (PD_MSG_HDR_ID(header) == pd->rx_msgid && |
| PD_MSG_HDR_TYPE(header) != MSG_SOFT_RESET) { |
| usbpd_dbg(&pd->dev, "MessageID already seen, discarding\n"); |
| return; |
| } |
| |
| pd->rx_msgid = PD_MSG_HDR_ID(header); |
| |
| /* discard Pings */ |
| if (PD_MSG_HDR_TYPE(header) == MSG_PING && !len) |
| return; |
| |
| /* check header's count field to see if it matches len */ |
| if (PD_MSG_HDR_COUNT(header) != (len / 4)) { |
| usbpd_err(&pd->dev, "header count (%d) mismatch, len=%zd\n", |
| PD_MSG_HDR_COUNT(header), len); |
| return; |
| } |
| |
| rx_msg = kzalloc(sizeof(*rx_msg), GFP_KERNEL); |
| if (!rx_msg) |
| return; |
| |
| rx_msg->type = PD_MSG_HDR_TYPE(header); |
| rx_msg->len = PD_MSG_HDR_COUNT(header); |
| memcpy(&rx_msg->payload, buf, min(len, sizeof(rx_msg->payload))); |
| |
| spin_lock_irqsave(&pd->rx_lock, flags); |
| list_add_tail(&rx_msg->entry, &pd->rx_q); |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| |
| usbpd_dbg(&pd->dev, "received message: type(%d) len(%d)\n", |
| rx_msg->type, rx_msg->len); |
| |
| kick_sm(pd, 0); |
| } |
| |
| static void phy_shutdown(struct usbpd *pd) |
| { |
| usbpd_dbg(&pd->dev, "shutdown"); |
| } |
| |
| static enum hrtimer_restart pd_timeout(struct hrtimer *timer) |
| { |
| struct usbpd *pd = container_of(timer, struct usbpd, timer); |
| |
| usbpd_dbg(&pd->dev, "timeout"); |
| queue_work(pd->wq, &pd->sm_work); |
| |
| return HRTIMER_NORESTART; |
| } |
| |
| /* Enters new state and executes actions on entry */ |
| static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state) |
| { |
| struct pd_phy_params phy_params = { |
| .signal_cb = phy_sig_received, |
| .msg_rx_cb = phy_msg_received, |
| .shutdown_cb = phy_shutdown, |
| .frame_filter_val = FRAME_FILTER_EN_SOP | |
| FRAME_FILTER_EN_HARD_RESET, |
| }; |
| union power_supply_propval val = {0}; |
| unsigned long flags; |
| int ret; |
| |
| usbpd_dbg(&pd->dev, "%s -> %s\n", |
| usbpd_state_strings[pd->current_state], |
| usbpd_state_strings[next_state]); |
| |
| pd->current_state = next_state; |
| |
| switch (next_state) { |
| case PE_ERROR_RECOVERY: /* perform hard disconnect/reconnect */ |
| pd->in_pr_swap = false; |
| pd->current_pr = PR_NONE; |
| set_power_role(pd, PR_NONE); |
| pd->typec_mode = POWER_SUPPLY_TYPEC_NONE; |
| kick_sm(pd, 0); |
| break; |
| |
| /* Source states */ |
| case PE_SRC_DISABLED: |
| /* are we still connected? */ |
| if (pd->typec_mode == POWER_SUPPLY_TYPEC_NONE) { |
| pd->current_pr = PR_NONE; |
| kick_sm(pd, 0); |
| } |
| |
| break; |
| |
| case PE_SRC_STARTUP: |
| if (pd->current_dr == DR_NONE) { |
| pd->current_dr = DR_DFP; |
| start_usb_host(pd, true); |
| } |
| |
| dual_role_instance_changed(pd->dual_role); |
| |
| /* Set CC back to DRP toggle for the next disconnect */ |
| val.intval = POWER_SUPPLY_TYPEC_PR_DUAL; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_TYPEC_POWER_ROLE, &val); |
| |
| pd_reset_protocol(pd); |
| |
| if (!pd->in_pr_swap) { |
| if (pd->pd_phy_opened) { |
| pd_phy_close(); |
| pd->pd_phy_opened = false; |
| } |
| |
| phy_params.data_role = pd->current_dr; |
| phy_params.power_role = pd->current_pr; |
| |
| ret = pd_phy_open(&phy_params); |
| if (ret) { |
| WARN_ON_ONCE(1); |
| usbpd_err(&pd->dev, "error opening PD PHY %d\n", |
| ret); |
| pd->current_state = PE_UNKNOWN; |
| return; |
| } |
| |
| pd->pd_phy_opened = true; |
| } |
| |
| if (pd->in_pr_swap) { |
| pd->in_pr_swap = false; |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| } |
| |
| /* |
| * A sink might remove its terminations (during some Type-C |
| * compliance tests or a sink attempting to do Try.SRC) |
| * at this point just after we enabled VBUS. Sending PD |
| * messages now would delay detecting the detach beyond the |
| * required timing. Instead, delay sending out the first |
| * source capabilities to allow for the other side to |
| * completely settle CC debounce and allow HW to detect detach |
| * sooner in the meantime. PD spec allows up to |
| * tFirstSourceCap (250ms). |
| */ |
| pd->current_state = PE_SRC_SEND_CAPABILITIES; |
| kick_sm(pd, FIRST_SOURCE_CAP_TIME); |
| break; |
| |
| case PE_SRC_SEND_CAPABILITIES: |
| kick_sm(pd, 0); |
| break; |
| |
| case PE_SRC_NEGOTIATE_CAPABILITY: |
| if (PD_RDO_OBJ_POS(pd->rdo) != 1 || |
| PD_RDO_FIXED_CURR(pd->rdo) > |
| PD_SRC_PDO_FIXED_MAX_CURR(*default_src_caps) || |
| PD_RDO_FIXED_CURR_MINMAX(pd->rdo) > |
| PD_SRC_PDO_FIXED_MAX_CURR(*default_src_caps)) { |
| /* send Reject */ |
| ret = pd_send_msg(pd, MSG_REJECT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Reject\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| usbpd_err(&pd->dev, "Invalid request: %08x\n", pd->rdo); |
| |
| if (pd->in_explicit_contract) |
| usbpd_set_state(pd, PE_SRC_READY); |
| else |
| /* |
| * bypass PE_SRC_Capability_Response and |
| * PE_SRC_Wait_New_Capabilities in this |
| * implementation for simplicity. |
| */ |
| usbpd_set_state(pd, PE_SRC_SEND_CAPABILITIES); |
| break; |
| } |
| |
| /* PE_SRC_TRANSITION_SUPPLY pseudo-state */ |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| /* tSrcTransition required after ACCEPT */ |
| usleep_range(SRC_TRANSITION_TIME * USEC_PER_MSEC, |
| (SRC_TRANSITION_TIME + 5) * USEC_PER_MSEC); |
| |
| /* |
| * Normally a voltage change should occur within tSrcReady |
| * but since we only support VSafe5V there is nothing more to |
| * prepare from the power supply so send PS_RDY right away. |
| */ |
| ret = pd_send_msg(pd, MSG_PS_RDY, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending PS_RDY\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| usbpd_set_state(pd, PE_SRC_READY); |
| break; |
| |
| case PE_SRC_READY: |
| pd->in_explicit_contract = true; |
| if (pd->current_dr == DR_DFP) { |
| /* don't start USB host until after SVDM discovery */ |
| if (pd->vdm_state == VDM_NONE) |
| usbpd_send_svdm(pd, USBPD_SID, |
| USBPD_SVDM_DISCOVER_IDENTITY, |
| SVDM_CMD_TYPE_INITIATOR, 0, |
| NULL, 0); |
| } |
| |
| kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE); |
| complete(&pd->is_ready); |
| dual_role_instance_changed(pd->dual_role); |
| break; |
| |
| case PE_SRC_HARD_RESET: |
| case PE_SNK_HARD_RESET: |
| /* are we still connected? */ |
| if (pd->typec_mode == POWER_SUPPLY_TYPEC_NONE) |
| pd->current_pr = PR_NONE; |
| |
| /* hard reset may sleep; handle it in the workqueue */ |
| kick_sm(pd, 0); |
| break; |
| |
| case PE_SRC_SEND_SOFT_RESET: |
| case PE_SNK_SEND_SOFT_RESET: |
| pd_reset_protocol(pd); |
| |
| ret = pd_send_msg(pd, MSG_SOFT_RESET, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Soft Reset, do Hard Reset\n"); |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_HARD_RESET : PE_SNK_HARD_RESET); |
| break; |
| } |
| |
| /* wait for ACCEPT */ |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| break; |
| |
| /* Sink states */ |
| case PE_SNK_STARTUP: |
| if (pd->current_dr == DR_NONE || pd->current_dr == DR_UFP) { |
| pd->current_dr = DR_UFP; |
| |
| if (pd->psy_type == POWER_SUPPLY_TYPE_USB || |
| pd->psy_type == POWER_SUPPLY_TYPE_USB_CDP || |
| usb_compliance_mode) |
| start_usb_peripheral(pd); |
| } |
| |
| dual_role_instance_changed(pd->dual_role); |
| |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_ALLOWED, &val); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to read USB PROP_PD_ALLOWED: %d\n", |
| ret); |
| break; |
| } |
| |
| if (!val.intval || disable_usb_pd) |
| break; |
| |
| pd_reset_protocol(pd); |
| |
| if (!pd->in_pr_swap) { |
| if (pd->pd_phy_opened) { |
| pd_phy_close(); |
| pd->pd_phy_opened = false; |
| } |
| |
| phy_params.data_role = pd->current_dr; |
| phy_params.power_role = pd->current_pr; |
| |
| ret = pd_phy_open(&phy_params); |
| if (ret) { |
| WARN_ON_ONCE(1); |
| usbpd_err(&pd->dev, "error opening PD PHY %d\n", |
| ret); |
| pd->current_state = PE_UNKNOWN; |
| return; |
| } |
| |
| pd->pd_phy_opened = true; |
| } |
| |
| pd->current_voltage = pd->requested_voltage = 5000000; |
| val.intval = pd->requested_voltage; /* set max range to 5V */ |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_VOLTAGE_MAX, &val); |
| |
| if (!pd->vbus_present) { |
| pd->current_state = PE_SNK_DISCOVERY; |
| /* max time for hard reset to turn vbus back on */ |
| kick_sm(pd, SNK_HARD_RESET_VBUS_ON_TIME); |
| break; |
| } |
| |
| pd->current_state = PE_SNK_WAIT_FOR_CAPABILITIES; |
| /* fall-through */ |
| |
| case PE_SNK_WAIT_FOR_CAPABILITIES: |
| spin_lock_irqsave(&pd->rx_lock, flags); |
| if (list_empty(&pd->rx_q)) |
| kick_sm(pd, SINK_WAIT_CAP_TIME); |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| break; |
| |
| case PE_SNK_EVALUATE_CAPABILITY: |
| pd->pd_connected = true; /* we know peer is PD capable */ |
| pd->hard_reset_count = 0; |
| |
| /* evaluate PDOs and select one */ |
| ret = pd_eval_src_caps(pd); |
| if (ret < 0) { |
| usbpd_err(&pd->dev, "Invalid src_caps received. Skipping request\n"); |
| break; |
| } |
| pd->current_state = PE_SNK_SELECT_CAPABILITY; |
| /* fall-through */ |
| |
| case PE_SNK_SELECT_CAPABILITY: |
| ret = pd_send_msg(pd, MSG_REQUEST, &pd->rdo, 1, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Request\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| break; |
| } |
| |
| /* wait for ACCEPT */ |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| break; |
| |
| case PE_SNK_TRANSITION_SINK: |
| /* wait for PS_RDY */ |
| kick_sm(pd, PS_TRANSITION_TIME); |
| break; |
| |
| case PE_SNK_READY: |
| pd->in_explicit_contract = true; |
| kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE); |
| complete(&pd->is_ready); |
| dual_role_instance_changed(pd->dual_role); |
| break; |
| |
| case PE_SNK_TRANSITION_TO_DEFAULT: |
| if (pd->current_dr != DR_UFP) { |
| stop_usb_host(pd); |
| start_usb_peripheral(pd); |
| pd->current_dr = DR_UFP; |
| pd_phy_update_roles(pd->current_dr, pd->current_pr); |
| } |
| if (pd->vconn_enabled) { |
| regulator_disable(pd->vconn); |
| pd->vconn_enabled = false; |
| } |
| |
| /* max time for hard reset to turn vbus off */ |
| kick_sm(pd, SNK_HARD_RESET_VBUS_OFF_TIME); |
| break; |
| |
| case PE_PRS_SNK_SRC_TRANSITION_TO_OFF: |
| val.intval = pd->requested_current = 0; /* suspend charging */ |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, &val); |
| |
| pd->in_explicit_contract = false; |
| |
| /* |
| * need to update PR bit in message header so that |
| * proper GoodCRC is sent when receiving next PS_RDY |
| */ |
| pd_phy_update_roles(pd->current_dr, PR_SRC); |
| |
| /* wait for PS_RDY */ |
| kick_sm(pd, PS_SOURCE_OFF); |
| break; |
| |
| default: |
| usbpd_dbg(&pd->dev, "No action for state %s\n", |
| usbpd_state_strings[pd->current_state]); |
| break; |
| } |
| } |
| |
| int usbpd_register_svid(struct usbpd *pd, struct usbpd_svid_handler *hdlr) |
| { |
| if (find_svid_handler(pd, hdlr->svid)) { |
| usbpd_err(&pd->dev, "SVID 0x%04x already registered\n", |
| hdlr->svid); |
| return -EINVAL; |
| } |
| |
| /* require connect/disconnect callbacks be implemented */ |
| if (!hdlr->connect || !hdlr->disconnect) { |
| usbpd_err(&pd->dev, "SVID 0x%04x connect/disconnect must be non-NULL\n", |
| hdlr->svid); |
| return -EINVAL; |
| } |
| |
| usbpd_dbg(&pd->dev, "registered handler for SVID 0x%04x\n", hdlr->svid); |
| |
| list_add_tail(&hdlr->entry, &pd->svid_handlers); |
| |
| /* already connected with this SVID discovered? */ |
| if (pd->vdm_state >= DISCOVERED_SVIDS) { |
| int i; |
| |
| for (i = 0; i < pd->num_svids; i++) { |
| if (pd->discovered_svids[i] == hdlr->svid) { |
| hdlr->connect(hdlr); |
| hdlr->discovered = true; |
| break; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(usbpd_register_svid); |
| |
| void usbpd_unregister_svid(struct usbpd *pd, struct usbpd_svid_handler *hdlr) |
| { |
| list_del_init(&hdlr->entry); |
| } |
| EXPORT_SYMBOL(usbpd_unregister_svid); |
| |
| int usbpd_send_vdm(struct usbpd *pd, u32 vdm_hdr, const u32 *vdos, int num_vdos) |
| { |
| struct vdm_tx *vdm_tx; |
| |
| if (!pd->in_explicit_contract || pd->vdm_tx) |
| return -EBUSY; |
| |
| vdm_tx = kzalloc(sizeof(*vdm_tx), GFP_KERNEL); |
| if (!vdm_tx) |
| return -ENOMEM; |
| |
| vdm_tx->data[0] = vdm_hdr; |
| if (vdos && num_vdos) |
| memcpy(&vdm_tx->data[1], vdos, num_vdos * sizeof(u32)); |
| vdm_tx->size = num_vdos + 1; /* include the header */ |
| |
| /* VDM will get sent in PE_SRC/SNK_READY state handling */ |
| pd->vdm_tx = vdm_tx; |
| |
| /* slight delay before queuing to prioritize handling of incoming VDM */ |
| kick_sm(pd, 2); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(usbpd_send_vdm); |
| |
| int usbpd_send_svdm(struct usbpd *pd, u16 svid, u8 cmd, |
| enum usbpd_svdm_cmd_type cmd_type, int obj_pos, |
| const u32 *vdos, int num_vdos) |
| { |
| u32 svdm_hdr = SVDM_HDR(svid, 0, obj_pos, cmd_type, cmd); |
| |
| usbpd_dbg(&pd->dev, "VDM tx: svid:%x cmd:%x cmd_type:%x svdm_hdr:%x\n", |
| svid, cmd, cmd_type, svdm_hdr); |
| |
| return usbpd_send_vdm(pd, svdm_hdr, vdos, num_vdos); |
| } |
| EXPORT_SYMBOL(usbpd_send_svdm); |
| |
| static void handle_vdm_rx(struct usbpd *pd, struct rx_msg *rx_msg) |
| { |
| u32 vdm_hdr = rx_msg->payload[0]; |
| u32 *vdos = &rx_msg->payload[1]; |
| u16 svid = VDM_HDR_SVID(vdm_hdr); |
| u16 *psvid; |
| u8 i, num_vdos = rx_msg->len - 1; /* num objects minus header */ |
| u8 cmd = SVDM_HDR_CMD(vdm_hdr); |
| u8 cmd_type = SVDM_HDR_CMD_TYPE(vdm_hdr); |
| bool has_dp = false; |
| struct usbpd_svid_handler *handler; |
| |
| usbpd_dbg(&pd->dev, "VDM rx: svid:%x cmd:%x cmd_type:%x vdm_hdr:%x\n", |
| svid, cmd, cmd_type, vdm_hdr); |
| |
| /* if it's a supported SVID, pass the message to the handler */ |
| handler = find_svid_handler(pd, svid); |
| |
| /* Unstructured VDM */ |
| if (!VDM_IS_SVDM(vdm_hdr)) { |
| if (handler && handler->vdm_received) |
| handler->vdm_received(handler, vdm_hdr, vdos, num_vdos); |
| return; |
| } |
| |
| /* if this interrupts a previous exchange, abort queued response */ |
| if (cmd_type == SVDM_CMD_TYPE_INITIATOR && pd->vdm_tx) { |
| usbpd_dbg(&pd->dev, "Discarding previously queued SVDM tx (SVID:0x%04x)\n", |
| VDM_HDR_SVID(pd->vdm_tx->data[0])); |
| |
| kfree(pd->vdm_tx); |
| pd->vdm_tx = NULL; |
| } |
| |
| if (handler && handler->svdm_received) { |
| handler->svdm_received(handler, cmd, cmd_type, vdos, num_vdos); |
| return; |
| } |
| |
| /* Standard Discovery or unhandled messages go here */ |
| switch (cmd_type) { |
| case SVDM_CMD_TYPE_INITIATOR: |
| if (svid == USBPD_SID && cmd == USBPD_SVDM_DISCOVER_IDENTITY) { |
| u32 tx_vdos[3] = { |
| ID_HDR_USB_HOST | ID_HDR_USB_DEVICE | |
| ID_HDR_PRODUCT_PER_MASK | ID_HDR_VID, |
| 0x0, /* TBD: Cert Stat VDO */ |
| (PROD_VDO_PID << 16), |
| /* TBD: Get these from gadget */ |
| }; |
| |
| usbpd_send_svdm(pd, USBPD_SID, cmd, |
| SVDM_CMD_TYPE_RESP_ACK, 0, tx_vdos, 3); |
| } else if (cmd != USBPD_SVDM_ATTENTION) { |
| usbpd_send_svdm(pd, svid, cmd, SVDM_CMD_TYPE_RESP_NAK, |
| SVDM_HDR_OBJ_POS(vdm_hdr), NULL, 0); |
| } |
| break; |
| |
| case SVDM_CMD_TYPE_RESP_ACK: |
| if (svid != USBPD_SID) { |
| usbpd_err(&pd->dev, "unhandled ACK for SVID:0x%x\n", |
| svid); |
| break; |
| } |
| |
| switch (cmd) { |
| case USBPD_SVDM_DISCOVER_IDENTITY: |
| kfree(pd->vdm_tx_retry); |
| pd->vdm_tx_retry = NULL; |
| |
| pd->vdm_state = DISCOVERED_ID; |
| usbpd_send_svdm(pd, USBPD_SID, |
| USBPD_SVDM_DISCOVER_SVIDS, |
| SVDM_CMD_TYPE_INITIATOR, 0, NULL, 0); |
| break; |
| |
| case USBPD_SVDM_DISCOVER_SVIDS: |
| pd->vdm_state = DISCOVERED_SVIDS; |
| |
| kfree(pd->vdm_tx_retry); |
| pd->vdm_tx_retry = NULL; |
| |
| if (!pd->discovered_svids) { |
| pd->num_svids = 2 * num_vdos; |
| pd->discovered_svids = kcalloc(pd->num_svids, |
| sizeof(u16), |
| GFP_KERNEL); |
| if (!pd->discovered_svids) { |
| usbpd_err(&pd->dev, "unable to allocate SVIDs\n"); |
| break; |
| } |
| |
| psvid = pd->discovered_svids; |
| } else { /* handle > 12 SVIDs */ |
| void *ptr; |
| size_t oldsize = pd->num_svids * sizeof(u16); |
| size_t newsize = oldsize + |
| (2 * num_vdos * sizeof(u16)); |
| |
| ptr = krealloc(pd->discovered_svids, newsize, |
| GFP_KERNEL); |
| if (!ptr) { |
| usbpd_err(&pd->dev, "unable to realloc SVIDs\n"); |
| break; |
| } |
| |
| pd->discovered_svids = ptr; |
| psvid = pd->discovered_svids + pd->num_svids; |
| memset(psvid, 0, (2 * num_vdos)); |
| pd->num_svids += 2 * num_vdos; |
| } |
| |
| /* convert 32-bit VDOs to list of 16-bit SVIDs */ |
| for (i = 0; i < num_vdos * 2; i++) { |
| /* |
| * Within each 32-bit VDO, |
| * SVID[i]: upper 16-bits |
| * SVID[i+1]: lower 16-bits |
| * where i is even. |
| */ |
| if (!(i & 1)) |
| svid = vdos[i >> 1] >> 16; |
| else |
| svid = vdos[i >> 1] & 0xFFFF; |
| |
| /* |
| * There are some devices that incorrectly |
| * swap the order of SVIDs within a VDO. So in |
| * case of an odd-number of SVIDs it could end |
| * up with SVID[i] as 0 while SVID[i+1] is |
| * non-zero. Just skip over the zero ones. |
| */ |
| if (svid) { |
| usbpd_dbg(&pd->dev, "Discovered SVID: 0x%04x\n", |
| svid); |
| *psvid++ = svid; |
| } |
| } |
| |
| /* if more than 12 SVIDs, resend the request */ |
| if (num_vdos == 6 && vdos[5] != 0) { |
| usbpd_send_svdm(pd, USBPD_SID, |
| USBPD_SVDM_DISCOVER_SVIDS, |
| SVDM_CMD_TYPE_INITIATOR, 0, |
| NULL, 0); |
| break; |
| } |
| |
| /* now that all SVIDs are discovered, notify handlers */ |
| for (i = 0; i < pd->num_svids; i++) { |
| svid = pd->discovered_svids[i]; |
| if (svid) { |
| handler = find_svid_handler(pd, svid); |
| if (handler) { |
| handler->connect(handler); |
| handler->discovered = true; |
| } |
| } |
| |
| if (svid == 0xFF01) |
| has_dp = true; |
| } |
| break; |
| |
| default: |
| usbpd_dbg(&pd->dev, "unhandled ACK for command:0x%x\n", |
| cmd); |
| break; |
| } |
| break; |
| |
| case SVDM_CMD_TYPE_RESP_NAK: |
| usbpd_info(&pd->dev, "VDM NAK received for SVID:0x%04x command:0x%x\n", |
| svid, cmd); |
| |
| switch (cmd) { |
| case USBPD_SVDM_DISCOVER_IDENTITY: |
| case USBPD_SVDM_DISCOVER_SVIDS: |
| break; |
| default: |
| break; |
| } |
| |
| break; |
| |
| case SVDM_CMD_TYPE_RESP_BUSY: |
| switch (cmd) { |
| case USBPD_SVDM_DISCOVER_IDENTITY: |
| case USBPD_SVDM_DISCOVER_SVIDS: |
| if (!pd->vdm_tx_retry) { |
| usbpd_err(&pd->dev, "Discover command %d VDM was unexpectedly freed\n", |
| cmd); |
| break; |
| } |
| |
| /* wait tVDMBusy, then retry */ |
| pd->vdm_tx = pd->vdm_tx_retry; |
| pd->vdm_tx_retry = NULL; |
| kick_sm(pd, VDM_BUSY_TIME); |
| break; |
| default: |
| break; |
| } |
| break; |
| } |
| } |
| |
| static void handle_vdm_tx(struct usbpd *pd) |
| { |
| int ret; |
| unsigned long flags; |
| |
| /* only send one VDM at a time */ |
| if (pd->vdm_tx) { |
| u32 vdm_hdr = pd->vdm_tx->data[0]; |
| |
| /* bail out and try again later if a message just arrived */ |
| spin_lock_irqsave(&pd->rx_lock, flags); |
| if (!list_empty(&pd->rx_q)) { |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| return; |
| } |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| |
| ret = pd_send_msg(pd, MSG_VDM, pd->vdm_tx->data, |
| pd->vdm_tx->size, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error (%d) sending VDM command %d\n", |
| ret, SVDM_HDR_CMD(pd->vdm_tx->data[0])); |
| |
| /* retry when hitting PE_SRC/SNK_Ready again */ |
| if (ret != -EBUSY) |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_SEND_SOFT_RESET : |
| PE_SNK_SEND_SOFT_RESET); |
| |
| return; |
| } |
| |
| /* |
| * special case: keep initiated Discover ID/SVIDs |
| * around in case we need to re-try when receiving BUSY |
| */ |
| if (VDM_IS_SVDM(vdm_hdr) && |
| SVDM_HDR_CMD_TYPE(vdm_hdr) == SVDM_CMD_TYPE_INITIATOR && |
| SVDM_HDR_CMD(vdm_hdr) <= USBPD_SVDM_DISCOVER_SVIDS) { |
| if (pd->vdm_tx_retry) { |
| usbpd_dbg(&pd->dev, "Previous Discover VDM command %d not ACKed/NAKed\n", |
| SVDM_HDR_CMD( |
| pd->vdm_tx_retry->data[0])); |
| kfree(pd->vdm_tx_retry); |
| } |
| pd->vdm_tx_retry = pd->vdm_tx; |
| } else { |
| kfree(pd->vdm_tx); |
| } |
| |
| pd->vdm_tx = NULL; |
| } |
| } |
| |
| static void reset_vdm_state(struct usbpd *pd) |
| { |
| struct usbpd_svid_handler *handler; |
| |
| list_for_each_entry(handler, &pd->svid_handlers, entry) { |
| if (handler->discovered) { |
| handler->disconnect(handler); |
| handler->discovered = false; |
| } |
| } |
| |
| pd->vdm_state = VDM_NONE; |
| kfree(pd->vdm_tx_retry); |
| pd->vdm_tx_retry = NULL; |
| kfree(pd->discovered_svids); |
| pd->discovered_svids = NULL; |
| pd->num_svids = 0; |
| kfree(pd->vdm_tx); |
| pd->vdm_tx = NULL; |
| } |
| |
| static void dr_swap(struct usbpd *pd) |
| { |
| reset_vdm_state(pd); |
| |
| if (pd->current_dr == DR_DFP) { |
| stop_usb_host(pd); |
| start_usb_peripheral(pd); |
| pd->current_dr = DR_UFP; |
| } else if (pd->current_dr == DR_UFP) { |
| stop_usb_peripheral(pd); |
| pd->current_dr = DR_DFP; |
| |
| /* don't start USB host until after SVDM discovery */ |
| usbpd_send_svdm(pd, USBPD_SID, USBPD_SVDM_DISCOVER_IDENTITY, |
| SVDM_CMD_TYPE_INITIATOR, 0, NULL, 0); |
| } |
| |
| pd_phy_update_roles(pd->current_dr, pd->current_pr); |
| dual_role_instance_changed(pd->dual_role); |
| } |
| |
| |
| static void vconn_swap(struct usbpd *pd) |
| { |
| int ret; |
| |
| if (pd->vconn_enabled) { |
| pd->current_state = PE_VCS_WAIT_FOR_VCONN; |
| kick_sm(pd, VCONN_ON_TIME); |
| } else { |
| ret = regulator_enable(pd->vconn); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to enable vconn\n"); |
| return; |
| } |
| |
| pd->vconn_enabled = true; |
| |
| /* |
| * Small delay to ensure Vconn has ramped up. This is well |
| * below tVCONNSourceOn (100ms) so we still send PS_RDY within |
| * the allowed time. |
| */ |
| usleep_range(5000, 10000); |
| |
| ret = pd_send_msg(pd, MSG_PS_RDY, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending PS_RDY\n"); |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_SEND_SOFT_RESET : |
| PE_SNK_SEND_SOFT_RESET); |
| return; |
| } |
| } |
| } |
| |
| static int enable_vbus(struct usbpd *pd) |
| { |
| union power_supply_propval val = {0}; |
| int count = 100; |
| int ret; |
| |
| if (!check_vsafe0v) |
| goto enable_reg; |
| |
| /* |
| * Check to make sure there's no lingering charge on |
| * VBUS before enabling it as a source. If so poll here |
| * until it goes below VSafe0V (0.8V) before proceeding. |
| */ |
| while (count--) { |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); |
| if (ret || val.intval <= 800000) |
| break; |
| usleep_range(20000, 30000); |
| } |
| |
| if (count < 99) |
| msleep(100); /* need to wait an additional tCCDebounce */ |
| |
| enable_reg: |
| ret = regulator_enable(pd->vbus); |
| if (ret) |
| usbpd_err(&pd->dev, "Unable to enable vbus (%d)\n", ret); |
| else |
| pd->vbus_enabled = true; |
| |
| return ret; |
| } |
| |
| static inline void rx_msg_cleanup(struct usbpd *pd) |
| { |
| struct rx_msg *msg, *tmp; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&pd->rx_lock, flags); |
| list_for_each_entry_safe(msg, tmp, &pd->rx_q, entry) { |
| list_del(&msg->entry); |
| kfree(msg); |
| } |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| } |
| |
| /* For PD 3.0, check SinkTxOk before allowing initiating AMS */ |
| static inline bool is_sink_tx_ok(struct usbpd *pd) |
| { |
| if (pd->spec_rev == USBPD_REV_30) |
| return pd->typec_mode == POWER_SUPPLY_TYPEC_SOURCE_HIGH; |
| |
| return true; |
| } |
| |
| /* Handles current state and determines transitions */ |
| static void usbpd_sm(struct work_struct *w) |
| { |
| struct usbpd *pd = container_of(w, struct usbpd, sm_work); |
| union power_supply_propval val = {0}; |
| int ret; |
| struct rx_msg *rx_msg = NULL; |
| unsigned long flags; |
| |
| usbpd_dbg(&pd->dev, "handle state %s\n", |
| usbpd_state_strings[pd->current_state]); |
| |
| hrtimer_cancel(&pd->timer); |
| pd->sm_queued = false; |
| |
| spin_lock_irqsave(&pd->rx_lock, flags); |
| if (!list_empty(&pd->rx_q)) { |
| rx_msg = list_first_entry(&pd->rx_q, struct rx_msg, entry); |
| list_del(&rx_msg->entry); |
| } |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| |
| /* Disconnect? */ |
| if (pd->current_pr == PR_NONE) { |
| if (pd->current_state == PE_UNKNOWN) |
| goto sm_done; |
| |
| if (pd->vconn_enabled) { |
| regulator_disable(pd->vconn); |
| pd->vconn_enabled = false; |
| } |
| |
| usbpd_info(&pd->dev, "USB Type-C disconnect\n"); |
| |
| if (pd->pd_phy_opened) { |
| pd_phy_close(); |
| pd->pd_phy_opened = false; |
| } |
| |
| pd->in_pr_swap = false; |
| pd->pd_connected = false; |
| pd->in_explicit_contract = false; |
| pd->hard_reset_recvd = false; |
| pd->caps_count = 0; |
| pd->hard_reset_count = 0; |
| pd->requested_voltage = 0; |
| pd->requested_current = 0; |
| pd->selected_pdo = pd->requested_pdo = 0; |
| memset(&pd->received_pdos, 0, sizeof(pd->received_pdos)); |
| rx_msg_cleanup(pd); |
| |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, &val); |
| |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_USB_SUSPEND_SUPPORTED, |
| &val); |
| |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_ACTIVE, &val); |
| |
| if (pd->vbus_enabled) { |
| regulator_disable(pd->vbus); |
| pd->vbus_enabled = false; |
| } |
| |
| reset_vdm_state(pd); |
| if (pd->current_dr == DR_UFP) |
| stop_usb_peripheral(pd); |
| else if (pd->current_dr == DR_DFP) |
| stop_usb_host(pd); |
| |
| pd->current_dr = DR_NONE; |
| |
| if (pd->current_state == PE_ERROR_RECOVERY) |
| /* forced disconnect, wait before resetting to DRP */ |
| usleep_range(ERROR_RECOVERY_TIME * USEC_PER_MSEC, |
| (ERROR_RECOVERY_TIME + 5) * USEC_PER_MSEC); |
| |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| |
| /* set due to dual_role class "mode" change */ |
| if (pd->forced_pr != POWER_SUPPLY_TYPEC_PR_NONE) |
| val.intval = pd->forced_pr; |
| else |
| /* Set CC back to DRP toggle */ |
| val.intval = POWER_SUPPLY_TYPEC_PR_DUAL; |
| |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_TYPEC_POWER_ROLE, &val); |
| pd->forced_pr = POWER_SUPPLY_TYPEC_PR_NONE; |
| |
| pd->current_state = PE_UNKNOWN; |
| |
| kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE); |
| dual_role_instance_changed(pd->dual_role); |
| |
| goto sm_done; |
| } |
| |
| /* Hard reset? */ |
| if (pd->hard_reset_recvd) { |
| pd->hard_reset_recvd = false; |
| |
| if (pd->requested_current) { |
| val.intval = pd->requested_current = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, &val); |
| } |
| |
| pd->requested_voltage = 5000000; |
| val.intval = pd->requested_voltage; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_VOLTAGE_MIN, &val); |
| |
| pd->in_pr_swap = false; |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| |
| pd->in_explicit_contract = false; |
| pd->selected_pdo = pd->requested_pdo = 0; |
| pd->rdo = 0; |
| rx_msg_cleanup(pd); |
| reset_vdm_state(pd); |
| kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE); |
| |
| if (pd->current_pr == PR_SINK) { |
| usbpd_set_state(pd, PE_SNK_TRANSITION_TO_DEFAULT); |
| } else { |
| pd->current_state = PE_SRC_TRANSITION_TO_DEFAULT; |
| kick_sm(pd, PS_HARD_RESET_TIME); |
| } |
| |
| goto sm_done; |
| } |
| |
| /* Soft reset? */ |
| if (IS_CTRL(rx_msg, MSG_SOFT_RESET)) { |
| usbpd_dbg(&pd->dev, "Handle soft reset\n"); |
| |
| if (pd->current_pr == PR_SRC) |
| pd->current_state = PE_SRC_SOFT_RESET; |
| else if (pd->current_pr == PR_SINK) |
| pd->current_state = PE_SNK_SOFT_RESET; |
| } |
| |
| switch (pd->current_state) { |
| case PE_UNKNOWN: |
| if (pd->current_pr == PR_SINK) { |
| usbpd_set_state(pd, PE_SNK_STARTUP); |
| } else if (pd->current_pr == PR_SRC) { |
| enable_vbus(pd); |
| if (!pd->vconn_enabled && |
| pd->typec_mode == |
| POWER_SUPPLY_TYPEC_SINK_POWERED_CABLE) { |
| ret = regulator_enable(pd->vconn); |
| if (ret) |
| usbpd_err(&pd->dev, "Unable to enable vconn\n"); |
| else |
| pd->vconn_enabled = true; |
| } |
| |
| usbpd_set_state(pd, PE_SRC_STARTUP); |
| } |
| break; |
| |
| case PE_SRC_STARTUP: |
| usbpd_set_state(pd, PE_SRC_STARTUP); |
| break; |
| |
| case PE_SRC_SEND_CAPABILITIES: |
| ret = pd_send_msg(pd, MSG_SOURCE_CAPABILITIES, default_src_caps, |
| ARRAY_SIZE(default_src_caps), SOP_MSG); |
| if (ret) { |
| pd->caps_count++; |
| if (pd->caps_count >= PD_CAPS_COUNT) { |
| usbpd_dbg(&pd->dev, "Src CapsCounter exceeded, disabling PD\n"); |
| usbpd_set_state(pd, PE_SRC_DISABLED); |
| |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_ACTIVE, |
| &val); |
| break; |
| } |
| |
| kick_sm(pd, SRC_CAP_TIME); |
| break; |
| } |
| |
| /* transmit was successful if GoodCRC was received */ |
| pd->caps_count = 0; |
| pd->hard_reset_count = 0; |
| pd->pd_connected = true; /* we know peer is PD capable */ |
| |
| /* wait for REQUEST */ |
| pd->current_state = PE_SRC_SEND_CAPABILITIES_WAIT; |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_ACTIVE, &val); |
| break; |
| |
| case PE_SRC_SEND_CAPABILITIES_WAIT: |
| if (IS_DATA(rx_msg, MSG_REQUEST)) { |
| pd->rdo = rx_msg->payload[0]; |
| usbpd_set_state(pd, PE_SRC_NEGOTIATE_CAPABILITY); |
| } else if (rx_msg) { |
| usbpd_err(&pd->dev, "Unexpected message received\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| } else { |
| usbpd_set_state(pd, PE_SRC_HARD_RESET); |
| } |
| break; |
| |
| case PE_SRC_READY: |
| if (IS_CTRL(rx_msg, MSG_GET_SOURCE_CAP)) { |
| pd->current_state = PE_SRC_SEND_CAPABILITIES; |
| kick_sm(pd, 0); |
| } else if (IS_CTRL(rx_msg, MSG_GET_SINK_CAP)) { |
| ret = pd_send_msg(pd, MSG_SINK_CAPABILITIES, |
| pd->sink_caps, pd->num_sink_caps, |
| SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Sink Caps\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| } |
| } else if (IS_DATA(rx_msg, MSG_REQUEST)) { |
| pd->rdo = rx_msg->payload[0]; |
| usbpd_set_state(pd, PE_SRC_NEGOTIATE_CAPABILITY); |
| } else if (IS_CTRL(rx_msg, MSG_DR_SWAP)) { |
| if (pd->vdm_state == MODE_ENTERED) { |
| usbpd_set_state(pd, PE_SRC_HARD_RESET); |
| break; |
| } |
| |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| dr_swap(pd); |
| } else if (IS_CTRL(rx_msg, MSG_PR_SWAP)) { |
| /* lock in current mode */ |
| set_power_role(pd, pd->current_pr); |
| |
| /* we'll happily accept Src->Sink requests anytime */ |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| pd->current_state = PE_PRS_SRC_SNK_TRANSITION_TO_OFF; |
| kick_sm(pd, SRC_TRANSITION_TIME); |
| break; |
| } else if (IS_CTRL(rx_msg, MSG_VCONN_SWAP)) { |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| vconn_swap(pd); |
| } else if (IS_DATA(rx_msg, MSG_VDM)) { |
| handle_vdm_rx(pd, rx_msg); |
| } else if (pd->send_pr_swap) { |
| pd->send_pr_swap = false; |
| ret = pd_send_msg(pd, MSG_PR_SWAP, NULL, 0, SOP_MSG); |
| if (ret) { |
| dev_err(&pd->dev, "Error sending PR Swap\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| pd->current_state = PE_PRS_SRC_SNK_SEND_SWAP; |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| } else if (pd->send_dr_swap) { |
| pd->send_dr_swap = false; |
| ret = pd_send_msg(pd, MSG_DR_SWAP, NULL, 0, SOP_MSG); |
| if (ret) { |
| dev_err(&pd->dev, "Error sending DR Swap\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| pd->current_state = PE_DRS_SEND_DR_SWAP; |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| } else { |
| handle_vdm_tx(pd); |
| } |
| break; |
| |
| case PE_SRC_TRANSITION_TO_DEFAULT: |
| if (pd->vconn_enabled) |
| regulator_disable(pd->vconn); |
| if (pd->vbus_enabled) |
| regulator_disable(pd->vbus); |
| |
| if (pd->current_dr != DR_DFP) { |
| extcon_set_state_sync(pd->extcon, EXTCON_USB, 0); |
| pd->current_dr = DR_DFP; |
| pd_phy_update_roles(pd->current_dr, pd->current_pr); |
| } |
| |
| msleep(SRC_RECOVER_TIME); |
| |
| pd->vbus_enabled = false; |
| enable_vbus(pd); |
| |
| if (pd->vconn_enabled) { |
| ret = regulator_enable(pd->vconn); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to enable vconn\n"); |
| pd->vconn_enabled = false; |
| } |
| } |
| |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, &val); |
| |
| usbpd_set_state(pd, PE_SRC_STARTUP); |
| break; |
| |
| case PE_SRC_HARD_RESET: |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, &val); |
| |
| pd_send_hard_reset(pd); |
| pd->in_explicit_contract = false; |
| pd->rdo = 0; |
| rx_msg_cleanup(pd); |
| reset_vdm_state(pd); |
| kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE); |
| |
| pd->current_state = PE_SRC_TRANSITION_TO_DEFAULT; |
| kick_sm(pd, PS_HARD_RESET_TIME); |
| break; |
| |
| case PE_SNK_STARTUP: |
| usbpd_set_state(pd, PE_SNK_STARTUP); |
| break; |
| |
| case PE_SNK_DISCOVERY: |
| if (!rx_msg) { |
| if (pd->vbus_present) |
| usbpd_set_state(pd, |
| PE_SNK_WAIT_FOR_CAPABILITIES); |
| |
| /* |
| * Handle disconnection in the middle of PR_Swap. |
| * Since in psy_changed() if pd->in_pr_swap is true |
| * we ignore the typec_mode==NONE change since that is |
| * expected to happen. However if the cable really did |
| * get disconnected we need to check for it here after |
| * waiting for VBUS presence times out. |
| */ |
| if (!pd->typec_mode) { |
| pd->current_pr = PR_NONE; |
| kick_sm(pd, 0); |
| } |
| |
| break; |
| } |
| /* else fall-through */ |
| |
| case PE_SNK_WAIT_FOR_CAPABILITIES: |
| pd->in_pr_swap = false; |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| |
| if (IS_DATA(rx_msg, MSG_SOURCE_CAPABILITIES)) { |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, |
| &val); |
| |
| /* save the PDOs so userspace can further evaluate */ |
| memcpy(&pd->received_pdos, rx_msg->payload, |
| sizeof(pd->received_pdos)); |
| pd->src_cap_id++; |
| |
| usbpd_set_state(pd, PE_SNK_EVALUATE_CAPABILITY); |
| |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_ACTIVE, &val); |
| } else if (pd->hard_reset_count < 3) { |
| usbpd_set_state(pd, PE_SNK_HARD_RESET); |
| } else { |
| usbpd_dbg(&pd->dev, "Sink hard reset count exceeded, disabling PD\n"); |
| |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, |
| &val); |
| |
| val.intval = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_ACTIVE, &val); |
| } |
| break; |
| |
| case PE_SNK_SELECT_CAPABILITY: |
| if (IS_CTRL(rx_msg, MSG_ACCEPT)) { |
| u32 pdo = pd->received_pdos[pd->requested_pdo - 1]; |
| bool same_pps = (pd->selected_pdo == pd->requested_pdo) |
| && (PD_SRC_PDO_TYPE(pdo) == |
| PD_SRC_PDO_TYPE_AUGMENTED); |
| |
| usbpd_set_state(pd, PE_SNK_TRANSITION_SINK); |
| |
| /* prepare for voltage increase/decrease */ |
| val.intval = pd->requested_voltage; |
| power_supply_set_property(pd->usb_psy, |
| pd->requested_voltage >= pd->current_voltage ? |
| POWER_SUPPLY_PROP_VOLTAGE_MAX : |
| POWER_SUPPLY_PROP_VOLTAGE_MIN, |
| &val); |
| |
| /* |
| * if changing voltages (not within the same PPS PDO), |
| * we must lower input current to pSnkStdby (2.5W). |
| * Calculate it and set PD_CURRENT_MAX accordingly. |
| */ |
| if (!same_pps && |
| pd->requested_voltage != pd->current_voltage) { |
| int mv = max(pd->requested_voltage, |
| pd->current_voltage) / 1000; |
| val.intval = (2500000 / mv) * 1000; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, &val); |
| } else { |
| /* decreasing current? */ |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, &val); |
| if (!ret && |
| pd->requested_current < val.intval) { |
| val.intval = |
| pd->requested_current * 1000; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, |
| &val); |
| } |
| } |
| |
| pd->selected_pdo = pd->requested_pdo; |
| } else if (IS_CTRL(rx_msg, MSG_REJECT) || |
| IS_CTRL(rx_msg, MSG_WAIT)) { |
| if (pd->in_explicit_contract) |
| usbpd_set_state(pd, PE_SNK_READY); |
| else |
| usbpd_set_state(pd, |
| PE_SNK_WAIT_FOR_CAPABILITIES); |
| } else if (rx_msg) { |
| usbpd_err(&pd->dev, "Invalid response to sink request\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| } else { |
| /* timed out; go to hard reset */ |
| usbpd_set_state(pd, PE_SNK_HARD_RESET); |
| } |
| break; |
| |
| case PE_SNK_TRANSITION_SINK: |
| if (IS_CTRL(rx_msg, MSG_PS_RDY)) { |
| val.intval = pd->requested_voltage; |
| power_supply_set_property(pd->usb_psy, |
| pd->requested_voltage >= pd->current_voltage ? |
| POWER_SUPPLY_PROP_VOLTAGE_MIN : |
| POWER_SUPPLY_PROP_VOLTAGE_MAX, &val); |
| pd->current_voltage = pd->requested_voltage; |
| |
| /* resume charging */ |
| val.intval = pd->requested_current * 1000; /* mA->uA */ |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, &val); |
| |
| usbpd_set_state(pd, PE_SNK_READY); |
| } else { |
| /* timed out; go to hard reset */ |
| usbpd_set_state(pd, PE_SNK_HARD_RESET); |
| } |
| break; |
| |
| case PE_SNK_READY: |
| if (IS_DATA(rx_msg, MSG_SOURCE_CAPABILITIES)) { |
| /* save the PDOs so userspace can further evaluate */ |
| memcpy(&pd->received_pdos, rx_msg->payload, |
| sizeof(pd->received_pdos)); |
| pd->src_cap_id++; |
| |
| usbpd_set_state(pd, PE_SNK_EVALUATE_CAPABILITY); |
| } else if (IS_CTRL(rx_msg, MSG_GET_SINK_CAP)) { |
| ret = pd_send_msg(pd, MSG_SINK_CAPABILITIES, |
| pd->sink_caps, pd->num_sink_caps, |
| SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Sink Caps\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| } |
| } else if (IS_CTRL(rx_msg, MSG_GET_SOURCE_CAP)) { |
| ret = pd_send_msg(pd, MSG_SOURCE_CAPABILITIES, |
| default_src_caps, |
| ARRAY_SIZE(default_src_caps), SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending SRC CAPs\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| break; |
| } |
| } else if (IS_CTRL(rx_msg, MSG_DR_SWAP)) { |
| if (pd->vdm_state == MODE_ENTERED) { |
| usbpd_set_state(pd, PE_SNK_HARD_RESET); |
| break; |
| } |
| |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SRC_SEND_SOFT_RESET); |
| break; |
| } |
| |
| dr_swap(pd); |
| } else if (IS_CTRL(rx_msg, MSG_PR_SWAP)) { |
| /* lock in current mode */ |
| set_power_role(pd, pd->current_pr); |
| |
| /* TODO: should we Reject in certain circumstances? */ |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| break; |
| } |
| |
| pd->in_pr_swap = true; |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| usbpd_set_state(pd, PE_PRS_SNK_SRC_TRANSITION_TO_OFF); |
| break; |
| } else if (IS_CTRL(rx_msg, MSG_VCONN_SWAP)) { |
| /* |
| * if VCONN is connected to VBUS, make sure we are |
| * not in high voltage contract, otherwise reject. |
| */ |
| if (!pd->vconn_is_external && |
| (pd->requested_voltage > 5000000)) { |
| ret = pd_send_msg(pd, MSG_REJECT, NULL, 0, |
| SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Reject\n"); |
| usbpd_set_state(pd, |
| PE_SNK_SEND_SOFT_RESET); |
| } |
| |
| break; |
| } |
| |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending Accept\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| break; |
| } |
| |
| vconn_swap(pd); |
| } else if (IS_DATA(rx_msg, MSG_VDM)) { |
| handle_vdm_rx(pd, rx_msg); |
| } else if (pd->send_request) { |
| pd->send_request = false; |
| usbpd_set_state(pd, PE_SNK_SELECT_CAPABILITY); |
| } else if (pd->send_pr_swap && is_sink_tx_ok(pd)) { |
| pd->send_pr_swap = false; |
| ret = pd_send_msg(pd, MSG_PR_SWAP, NULL, 0, SOP_MSG); |
| if (ret) { |
| dev_err(&pd->dev, "Error sending PR Swap\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| break; |
| } |
| |
| pd->current_state = PE_PRS_SNK_SRC_SEND_SWAP; |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| } else if (pd->send_dr_swap && is_sink_tx_ok(pd)) { |
| pd->send_dr_swap = false; |
| ret = pd_send_msg(pd, MSG_DR_SWAP, NULL, 0, SOP_MSG); |
| if (ret) { |
| dev_err(&pd->dev, "Error sending DR Swap\n"); |
| usbpd_set_state(pd, PE_SNK_SEND_SOFT_RESET); |
| break; |
| } |
| |
| pd->current_state = PE_DRS_SEND_DR_SWAP; |
| kick_sm(pd, SENDER_RESPONSE_TIME); |
| } else if (is_sink_tx_ok(pd)) { |
| handle_vdm_tx(pd); |
| } |
| break; |
| |
| case PE_SNK_TRANSITION_TO_DEFAULT: |
| usbpd_set_state(pd, PE_SNK_STARTUP); |
| break; |
| |
| case PE_SRC_SOFT_RESET: |
| case PE_SNK_SOFT_RESET: |
| pd_reset_protocol(pd); |
| |
| ret = pd_send_msg(pd, MSG_ACCEPT, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "%s: Error sending Accept, do Hard Reset\n", |
| usbpd_state_strings[pd->current_state]); |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_HARD_RESET : PE_SNK_HARD_RESET); |
| break; |
| } |
| |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_SEND_CAPABILITIES : |
| PE_SNK_WAIT_FOR_CAPABILITIES); |
| break; |
| |
| case PE_SRC_SEND_SOFT_RESET: |
| case PE_SNK_SEND_SOFT_RESET: |
| if (IS_CTRL(rx_msg, MSG_ACCEPT)) { |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_SEND_CAPABILITIES : |
| PE_SNK_WAIT_FOR_CAPABILITIES); |
| } else { |
| usbpd_err(&pd->dev, "%s: Did not see Accept, do Hard Reset\n", |
| usbpd_state_strings[pd->current_state]); |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_HARD_RESET : PE_SNK_HARD_RESET); |
| } |
| break; |
| |
| case PE_SNK_HARD_RESET: |
| /* prepare charger for VBUS change */ |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_IN_HARD_RESET, &val); |
| |
| pd->requested_voltage = 5000000; |
| |
| if (pd->requested_current) { |
| val.intval = pd->requested_current = 0; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PD_CURRENT_MAX, &val); |
| } |
| |
| val.intval = pd->requested_voltage; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_VOLTAGE_MIN, &val); |
| |
| pd_send_hard_reset(pd); |
| pd->in_explicit_contract = false; |
| pd->selected_pdo = pd->requested_pdo = 0; |
| pd->rdo = 0; |
| reset_vdm_state(pd); |
| kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE); |
| usbpd_set_state(pd, PE_SNK_TRANSITION_TO_DEFAULT); |
| break; |
| |
| case PE_DRS_SEND_DR_SWAP: |
| if (IS_CTRL(rx_msg, MSG_ACCEPT)) |
| dr_swap(pd); |
| |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_READY : PE_SNK_READY); |
| break; |
| |
| case PE_PRS_SRC_SNK_SEND_SWAP: |
| if (!IS_CTRL(rx_msg, MSG_ACCEPT)) { |
| pd->current_state = PE_SRC_READY; |
| break; |
| } |
| |
| pd->current_state = PE_PRS_SRC_SNK_TRANSITION_TO_OFF; |
| kick_sm(pd, SRC_TRANSITION_TIME); |
| break; |
| |
| case PE_PRS_SRC_SNK_TRANSITION_TO_OFF: |
| pd->in_pr_swap = true; |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| pd->in_explicit_contract = false; |
| |
| if (pd->vbus_enabled) { |
| regulator_disable(pd->vbus); |
| pd->vbus_enabled = false; |
| } |
| |
| /* PE_PRS_SRC_SNK_Assert_Rd */ |
| pd->current_pr = PR_SINK; |
| set_power_role(pd, pd->current_pr); |
| pd_phy_update_roles(pd->current_dr, pd->current_pr); |
| |
| /* allow time for Vbus discharge, must be < tSrcSwapStdby */ |
| msleep(500); |
| |
| ret = pd_send_msg(pd, MSG_PS_RDY, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending PS_RDY\n"); |
| usbpd_set_state(pd, PE_ERROR_RECOVERY); |
| break; |
| } |
| |
| pd->current_state = PE_PRS_SRC_SNK_WAIT_SOURCE_ON; |
| kick_sm(pd, PS_SOURCE_ON); |
| break; |
| |
| case PE_PRS_SRC_SNK_WAIT_SOURCE_ON: |
| if (IS_CTRL(rx_msg, MSG_PS_RDY)) |
| usbpd_set_state(pd, PE_SNK_STARTUP); |
| else |
| usbpd_set_state(pd, PE_ERROR_RECOVERY); |
| break; |
| |
| case PE_PRS_SNK_SRC_SEND_SWAP: |
| if (!IS_CTRL(rx_msg, MSG_ACCEPT)) { |
| pd->current_state = PE_SNK_READY; |
| break; |
| } |
| |
| pd->in_pr_swap = true; |
| val.intval = 1; |
| power_supply_set_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PR_SWAP, &val); |
| usbpd_set_state(pd, PE_PRS_SNK_SRC_TRANSITION_TO_OFF); |
| break; |
| |
| case PE_PRS_SNK_SRC_TRANSITION_TO_OFF: |
| if (!IS_CTRL(rx_msg, MSG_PS_RDY)) { |
| usbpd_set_state(pd, PE_ERROR_RECOVERY); |
| break; |
| } |
| |
| /* PE_PRS_SNK_SRC_Assert_Rp */ |
| pd->current_pr = PR_SRC; |
| set_power_role(pd, pd->current_pr); |
| pd->current_state = PE_PRS_SNK_SRC_SOURCE_ON; |
| |
| /* fall-through */ |
| |
| case PE_PRS_SNK_SRC_SOURCE_ON: |
| enable_vbus(pd); |
| msleep(200); /* allow time VBUS ramp-up, must be < tNewSrc */ |
| |
| ret = pd_send_msg(pd, MSG_PS_RDY, NULL, 0, SOP_MSG); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error sending PS_RDY\n"); |
| usbpd_set_state(pd, PE_ERROR_RECOVERY); |
| break; |
| } |
| |
| usbpd_set_state(pd, PE_SRC_STARTUP); |
| break; |
| |
| case PE_VCS_WAIT_FOR_VCONN: |
| if (IS_CTRL(rx_msg, MSG_PS_RDY)) { |
| /* |
| * hopefully redundant check but in case not enabled |
| * avoids unbalanced regulator disable count |
| */ |
| if (pd->vconn_enabled) |
| regulator_disable(pd->vconn); |
| pd->vconn_enabled = false; |
| |
| pd->current_state = pd->current_pr == PR_SRC ? |
| PE_SRC_READY : PE_SNK_READY; |
| } else { |
| /* timed out; go to hard reset */ |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_HARD_RESET : PE_SNK_HARD_RESET); |
| } |
| |
| break; |
| |
| default: |
| usbpd_err(&pd->dev, "Unhandled state %s\n", |
| usbpd_state_strings[pd->current_state]); |
| break; |
| } |
| |
| sm_done: |
| kfree(rx_msg); |
| |
| spin_lock_irqsave(&pd->rx_lock, flags); |
| ret = list_empty(&pd->rx_q); |
| spin_unlock_irqrestore(&pd->rx_lock, flags); |
| |
| /* requeue if there are any new/pending RX messages */ |
| if (!ret) |
| kick_sm(pd, 0); |
| |
| if (!pd->sm_queued) |
| pm_relax(&pd->dev); |
| } |
| |
| static inline const char *src_current(enum power_supply_typec_mode typec_mode) |
| { |
| switch (typec_mode) { |
| case POWER_SUPPLY_TYPEC_SOURCE_DEFAULT: |
| return "default"; |
| case POWER_SUPPLY_TYPEC_SOURCE_MEDIUM: |
| return "medium - 1.5A"; |
| case POWER_SUPPLY_TYPEC_SOURCE_HIGH: |
| return "high - 3.0A"; |
| default: |
| return ""; |
| } |
| } |
| |
| static int psy_changed(struct notifier_block *nb, unsigned long evt, void *ptr) |
| { |
| struct usbpd *pd = container_of(nb, struct usbpd, psy_nb); |
| union power_supply_propval val; |
| enum power_supply_typec_mode typec_mode; |
| int ret; |
| |
| if (ptr != pd->usb_psy || evt != PSY_EVENT_PROP_CHANGED) |
| return 0; |
| |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_TYPEC_MODE, &val); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to read USB TYPEC_MODE: %d\n", ret); |
| return ret; |
| } |
| |
| typec_mode = val.intval; |
| |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PE_START, &val); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to read USB PROP_PE_START: %d\n", |
| ret); |
| return ret; |
| } |
| |
| /* Don't proceed if PE_START=0 as other props may still change */ |
| if (!val.intval && !pd->pd_connected && |
| typec_mode != POWER_SUPPLY_TYPEC_NONE) |
| return 0; |
| |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_PRESENT, &val); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to read USB PRESENT: %d\n", ret); |
| return ret; |
| } |
| |
| pd->vbus_present = val.intval; |
| |
| ret = power_supply_get_property(pd->usb_psy, |
| POWER_SUPPLY_PROP_REAL_TYPE, &val); |
| if (ret) { |
| usbpd_err(&pd->dev, "Unable to read USB TYPE: %d\n", ret); |
| return ret; |
| } |
| |
| pd->psy_type = val.intval; |
| |
| /* |
| * For sink hard reset, state machine needs to know when VBUS changes |
| * - when in PE_SNK_TRANSITION_TO_DEFAULT, notify when VBUS falls |
| * - when in PE_SNK_DISCOVERY, notify when VBUS rises |
| */ |
| if (typec_mode && ((!pd->vbus_present && |
| pd->current_state == PE_SNK_TRANSITION_TO_DEFAULT) || |
| (pd->vbus_present && pd->current_state == PE_SNK_DISCOVERY))) { |
| usbpd_dbg(&pd->dev, "hard reset: typec mode:%d present:%d\n", |
| typec_mode, pd->vbus_present); |
| pd->typec_mode = typec_mode; |
| kick_sm(pd, 0); |
| return 0; |
| } |
| |
| if (pd->typec_mode == typec_mode) |
| return 0; |
| |
| pd->typec_mode = typec_mode; |
| |
| usbpd_dbg(&pd->dev, "typec mode:%d present:%d type:%d orientation:%d\n", |
| typec_mode, pd->vbus_present, pd->psy_type, |
| usbpd_get_plug_orientation(pd)); |
| |
| switch (typec_mode) { |
| /* Disconnect */ |
| case POWER_SUPPLY_TYPEC_NONE: |
| if (pd->in_pr_swap) { |
| usbpd_dbg(&pd->dev, "Ignoring disconnect due to PR swap\n"); |
| return 0; |
| } |
| |
| pd->current_pr = PR_NONE; |
| break; |
| |
| /* Sink states */ |
| case POWER_SUPPLY_TYPEC_SOURCE_DEFAULT: |
| case POWER_SUPPLY_TYPEC_SOURCE_MEDIUM: |
| case POWER_SUPPLY_TYPEC_SOURCE_HIGH: |
| usbpd_info(&pd->dev, "Type-C Source (%s) connected\n", |
| src_current(typec_mode)); |
| |
| /* if waiting for SinkTxOk to start an AMS */ |
| if (pd->spec_rev == USBPD_REV_30 && |
| typec_mode == POWER_SUPPLY_TYPEC_SOURCE_HIGH && |
| (pd->send_pr_swap || pd->send_dr_swap || pd->vdm_tx)) |
| break; |
| |
| if (pd->current_pr == PR_SINK) |
| return 0; |
| |
| pd->current_pr = PR_SINK; |
| break; |
| |
| /* Source states */ |
| case POWER_SUPPLY_TYPEC_SINK_POWERED_CABLE: |
| case POWER_SUPPLY_TYPEC_SINK: |
| usbpd_info(&pd->dev, "Type-C Sink%s connected\n", |
| typec_mode == POWER_SUPPLY_TYPEC_SINK ? |
| "" : " (powered)"); |
| |
| if (pd->current_pr == PR_SRC) |
| return 0; |
| |
| pd->current_pr = PR_SRC; |
| break; |
| |
| case POWER_SUPPLY_TYPEC_SINK_DEBUG_ACCESSORY: |
| usbpd_info(&pd->dev, "Type-C Debug Accessory connected\n"); |
| break; |
| case POWER_SUPPLY_TYPEC_SINK_AUDIO_ADAPTER: |
| usbpd_info(&pd->dev, "Type-C Analog Audio Adapter connected\n"); |
| break; |
| default: |
| usbpd_warn(&pd->dev, "Unsupported typec mode:%d\n", |
| typec_mode); |
| break; |
| } |
| |
| /* queue state machine due to CC state change */ |
| kick_sm(pd, 0); |
| return 0; |
| } |
| |
| static enum dual_role_property usbpd_dr_properties[] = { |
| DUAL_ROLE_PROP_SUPPORTED_MODES, |
| DUAL_ROLE_PROP_MODE, |
| DUAL_ROLE_PROP_PR, |
| DUAL_ROLE_PROP_DR, |
| }; |
| |
| static int usbpd_dr_get_property(struct dual_role_phy_instance *dual_role, |
| enum dual_role_property prop, unsigned int *val) |
| { |
| struct usbpd *pd = dual_role_get_drvdata(dual_role); |
| |
| if (!pd) |
| return -ENODEV; |
| |
| switch (prop) { |
| case DUAL_ROLE_PROP_MODE: |
| /* For now associate UFP/DFP with data role only */ |
| if (pd->current_dr == DR_UFP) |
| *val = DUAL_ROLE_PROP_MODE_UFP; |
| else if (pd->current_dr == DR_DFP) |
| *val = DUAL_ROLE_PROP_MODE_DFP; |
| else |
| *val = DUAL_ROLE_PROP_MODE_NONE; |
| break; |
| case DUAL_ROLE_PROP_PR: |
| if (pd->current_pr == PR_SRC) |
| *val = DUAL_ROLE_PROP_PR_SRC; |
| else if (pd->current_pr == PR_SINK) |
| *val = DUAL_ROLE_PROP_PR_SNK; |
| else |
| *val = DUAL_ROLE_PROP_PR_NONE; |
| break; |
| case DUAL_ROLE_PROP_DR: |
| if (pd->current_dr == DR_UFP) |
| *val = DUAL_ROLE_PROP_DR_DEVICE; |
| else if (pd->current_dr == DR_DFP) |
| *val = DUAL_ROLE_PROP_DR_HOST; |
| else |
| *val = DUAL_ROLE_PROP_DR_NONE; |
| break; |
| default: |
| usbpd_warn(&pd->dev, "unsupported property %d\n", prop); |
| return -ENODATA; |
| } |
| |
| return 0; |
| } |
| |
| static int usbpd_dr_set_property(struct dual_role_phy_instance *dual_role, |
| enum dual_role_property prop, const unsigned int *val) |
| { |
| struct usbpd *pd = dual_role_get_drvdata(dual_role); |
| bool do_swap = false; |
| |
| if (!pd) |
| return -ENODEV; |
| |
| switch (prop) { |
| case DUAL_ROLE_PROP_MODE: |
| usbpd_dbg(&pd->dev, "Setting mode to %d\n", *val); |
| |
| /* |
| * Forces disconnect on CC and re-establishes connection. |
| * This does not use PD-based PR/DR swap |
| */ |
| if (*val == DUAL_ROLE_PROP_MODE_UFP) |
| pd->forced_pr = POWER_SUPPLY_TYPEC_PR_SINK; |
| else if (*val == DUAL_ROLE_PROP_MODE_DFP) |
| pd->forced_pr = POWER_SUPPLY_TYPEC_PR_SOURCE; |
| |
| /* new mode will be applied in disconnect handler */ |
| set_power_role(pd, PR_NONE); |
| |
| /* wait until it takes effect */ |
| while (pd->forced_pr != POWER_SUPPLY_TYPEC_PR_NONE) |
| msleep(20); |
| |
| break; |
| |
| case DUAL_ROLE_PROP_DR: |
| usbpd_dbg(&pd->dev, "Setting data_role to %d\n", *val); |
| |
| if (*val == DUAL_ROLE_PROP_DR_HOST) { |
| if (pd->current_dr == DR_UFP) |
| do_swap = true; |
| } else if (*val == DUAL_ROLE_PROP_DR_DEVICE) { |
| if (pd->current_dr == DR_DFP) |
| do_swap = true; |
| } else { |
| usbpd_warn(&pd->dev, "setting data_role to 'none' unsupported\n"); |
| return -ENOTSUPP; |
| } |
| |
| if (do_swap) { |
| if (pd->current_state != PE_SRC_READY && |
| pd->current_state != PE_SNK_READY) { |
| usbpd_err(&pd->dev, "data_role swap not allowed: PD not in Ready state\n"); |
| return -EAGAIN; |
| } |
| |
| if (pd->current_state == PE_SNK_READY && |
| !is_sink_tx_ok(pd)) { |
| usbpd_err(&pd->dev, "Rp indicates SinkTxNG\n"); |
| return -EAGAIN; |
| } |
| |
| mutex_lock(&pd->swap_lock); |
| reinit_completion(&pd->is_ready); |
| pd->send_dr_swap = true; |
| kick_sm(pd, 0); |
| |
| /* wait for operation to complete */ |
| if (!wait_for_completion_timeout(&pd->is_ready, |
| msecs_to_jiffies(100))) { |
| usbpd_err(&pd->dev, "data_role swap timed out\n"); |
| mutex_unlock(&pd->swap_lock); |
| return -ETIMEDOUT; |
| } |
| |
| mutex_unlock(&pd->swap_lock); |
| |
| if ((*val == DUAL_ROLE_PROP_DR_HOST && |
| pd->current_dr != DR_DFP) || |
| (*val == DUAL_ROLE_PROP_DR_DEVICE && |
| pd->current_dr != DR_UFP)) { |
| usbpd_err(&pd->dev, "incorrect state (%s) after data_role swap\n", |
| pd->current_dr == DR_DFP ? |
| "dfp" : "ufp"); |
| return -EPROTO; |
| } |
| } |
| |
| break; |
| |
| case DUAL_ROLE_PROP_PR: |
| usbpd_dbg(&pd->dev, "Setting power_role to %d\n", *val); |
| |
| if (*val == DUAL_ROLE_PROP_PR_SRC) { |
| if (pd->current_pr == PR_SINK) |
| do_swap = true; |
| } else if (*val == DUAL_ROLE_PROP_PR_SNK) { |
| if (pd->current_pr == PR_SRC) |
| do_swap = true; |
| } else { |
| usbpd_warn(&pd->dev, "setting power_role to 'none' unsupported\n"); |
| return -ENOTSUPP; |
| } |
| |
| if (do_swap) { |
| if (pd->current_state != PE_SRC_READY && |
| pd->current_state != PE_SNK_READY) { |
| usbpd_err(&pd->dev, "power_role swap not allowed: PD not in Ready state\n"); |
| return -EAGAIN; |
| } |
| |
| if (pd->current_state == PE_SNK_READY && |
| !is_sink_tx_ok(pd)) { |
| usbpd_err(&pd->dev, "Rp indicates SinkTxNG\n"); |
| return -EAGAIN; |
| } |
| |
| mutex_lock(&pd->swap_lock); |
| reinit_completion(&pd->is_ready); |
| pd->send_pr_swap = true; |
| kick_sm(pd, 0); |
| |
| /* wait for operation to complete */ |
| if (!wait_for_completion_timeout(&pd->is_ready, |
| msecs_to_jiffies(2000))) { |
| usbpd_err(&pd->dev, "power_role swap timed out\n"); |
| mutex_unlock(&pd->swap_lock); |
| return -ETIMEDOUT; |
| } |
| |
| mutex_unlock(&pd->swap_lock); |
| |
| if ((*val == DUAL_ROLE_PROP_PR_SRC && |
| pd->current_pr != PR_SRC) || |
| (*val == DUAL_ROLE_PROP_PR_SNK && |
| pd->current_pr != PR_SINK)) { |
| usbpd_err(&pd->dev, "incorrect state (%s) after power_role swap\n", |
| pd->current_pr == PR_SRC ? |
| "source" : "sink"); |
| return -EPROTO; |
| } |
| } |
| break; |
| |
| default: |
| usbpd_warn(&pd->dev, "unsupported property %d\n", prop); |
| return -ENOTSUPP; |
| } |
| |
| return 0; |
| } |
| |
| static int usbpd_dr_prop_writeable(struct dual_role_phy_instance *dual_role, |
| enum dual_role_property prop) |
| { |
| struct usbpd *pd = dual_role_get_drvdata(dual_role); |
| |
| switch (prop) { |
| case DUAL_ROLE_PROP_MODE: |
| return 1; |
| case DUAL_ROLE_PROP_DR: |
| case DUAL_ROLE_PROP_PR: |
| if (pd) |
| return pd->current_state == PE_SNK_READY || |
| pd->current_state == PE_SRC_READY; |
| break; |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int usbpd_uevent(struct device *dev, struct kobj_uevent_env *env) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| int i; |
| |
| add_uevent_var(env, "DATA_ROLE=%s", pd->current_dr == DR_DFP ? |
| "dfp" : "ufp"); |
| |
| if (pd->current_pr == PR_SINK) { |
| add_uevent_var(env, "POWER_ROLE=sink"); |
| add_uevent_var(env, "SRC_CAP_ID=%d", pd->src_cap_id); |
| |
| for (i = 0; i < ARRAY_SIZE(pd->received_pdos); i++) |
| add_uevent_var(env, "PDO%d=%08x", i, |
| pd->received_pdos[i]); |
| |
| add_uevent_var(env, "REQUESTED_PDO=%d", pd->requested_pdo); |
| add_uevent_var(env, "SELECTED_PDO=%d", pd->selected_pdo); |
| } else { |
| add_uevent_var(env, "POWER_ROLE=source"); |
| for (i = 0; i < ARRAY_SIZE(default_src_caps); i++) |
| add_uevent_var(env, "PDO%d=%08x", i, |
| default_src_caps[i]); |
| } |
| |
| add_uevent_var(env, "RDO=%08x", pd->rdo); |
| add_uevent_var(env, "CONTRACT=%s", pd->in_explicit_contract ? |
| "explicit" : "implicit"); |
| add_uevent_var(env, "ALT_MODE=%d", pd->vdm_state == MODE_ENTERED); |
| |
| return 0; |
| } |
| |
| static ssize_t contract_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| pd->in_explicit_contract ? "explicit" : "implicit"); |
| } |
| static DEVICE_ATTR_RO(contract); |
| |
| static ssize_t current_pr_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| const char *pr = "none"; |
| |
| if (pd->current_pr == PR_SINK) |
| pr = "sink"; |
| else if (pd->current_pr == PR_SRC) |
| pr = "source"; |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", pr); |
| } |
| static DEVICE_ATTR_RO(current_pr); |
| |
| static ssize_t initial_pr_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| const char *pr = "none"; |
| |
| if (pd->typec_mode >= POWER_SUPPLY_TYPEC_SOURCE_DEFAULT) |
| pr = "sink"; |
| else if (pd->typec_mode >= POWER_SUPPLY_TYPEC_SINK) |
| pr = "source"; |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", pr); |
| } |
| static DEVICE_ATTR_RO(initial_pr); |
| |
| static ssize_t current_dr_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| const char *dr = "none"; |
| |
| if (pd->current_dr == DR_UFP) |
| dr = "ufp"; |
| else if (pd->current_dr == DR_DFP) |
| dr = "dfp"; |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", dr); |
| } |
| static DEVICE_ATTR_RO(current_dr); |
| |
| static ssize_t initial_dr_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| const char *dr = "none"; |
| |
| if (pd->typec_mode >= POWER_SUPPLY_TYPEC_SOURCE_DEFAULT) |
| dr = "ufp"; |
| else if (pd->typec_mode >= POWER_SUPPLY_TYPEC_SINK) |
| dr = "dfp"; |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", dr); |
| } |
| static DEVICE_ATTR_RO(initial_dr); |
| |
| static ssize_t src_cap_id_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%d\n", pd->src_cap_id); |
| } |
| static DEVICE_ATTR_RO(src_cap_id); |
| |
| /* Dump received source PDOs in human-readable format */ |
| static ssize_t pdo_h_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| int i; |
| ssize_t cnt = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(pd->received_pdos); i++) { |
| u32 pdo = pd->received_pdos[i]; |
| |
| if (pdo == 0) |
| break; |
| |
| cnt += scnprintf(&buf[cnt], PAGE_SIZE - cnt, "PDO %d\n", i + 1); |
| |
| if (PD_SRC_PDO_TYPE(pdo) == PD_SRC_PDO_TYPE_FIXED) { |
| cnt += scnprintf(&buf[cnt], PAGE_SIZE - cnt, |
| "\tFixed supply\n" |
| "\tDual-Role Power:%d\n" |
| "\tUSB Suspend Supported:%d\n" |
| "\tExternally Powered:%d\n" |
| "\tUSB Communications Capable:%d\n" |
| "\tData Role Swap:%d\n" |
| "\tPeak Current:%d\n" |
| "\tVoltage:%d (mV)\n" |
| "\tMax Current:%d (mA)\n", |
| PD_SRC_PDO_FIXED_PR_SWAP(pdo), |
| PD_SRC_PDO_FIXED_USB_SUSP(pdo), |
| PD_SRC_PDO_FIXED_EXT_POWERED(pdo), |
| PD_SRC_PDO_FIXED_USB_COMM(pdo), |
| PD_SRC_PDO_FIXED_DR_SWAP(pdo), |
| PD_SRC_PDO_FIXED_PEAK_CURR(pdo), |
| PD_SRC_PDO_FIXED_VOLTAGE(pdo) * 50, |
| PD_SRC_PDO_FIXED_MAX_CURR(pdo) * 10); |
| } else if (PD_SRC_PDO_TYPE(pdo) == PD_SRC_PDO_TYPE_BATTERY) { |
| cnt += scnprintf(&buf[cnt], PAGE_SIZE - cnt, |
| "\tBattery supply\n" |
| "\tMax Voltage:%d (mV)\n" |
| "\tMin Voltage:%d (mV)\n" |
| "\tMax Power:%d (mW)\n", |
| PD_SRC_PDO_VAR_BATT_MAX_VOLT(pdo) * 50, |
| PD_SRC_PDO_VAR_BATT_MIN_VOLT(pdo) * 50, |
| PD_SRC_PDO_VAR_BATT_MAX(pdo) * 250); |
| } else if (PD_SRC_PDO_TYPE(pdo) == PD_SRC_PDO_TYPE_VARIABLE) { |
| cnt += scnprintf(&buf[cnt], PAGE_SIZE - cnt, |
| "\tVariable supply\n" |
| "\tMax Voltage:%d (mV)\n" |
| "\tMin Voltage:%d (mV)\n" |
| "\tMax Current:%d (mA)\n", |
| PD_SRC_PDO_VAR_BATT_MAX_VOLT(pdo) * 50, |
| PD_SRC_PDO_VAR_BATT_MIN_VOLT(pdo) * 50, |
| PD_SRC_PDO_VAR_BATT_MAX(pdo) * 10); |
| } else if (PD_SRC_PDO_TYPE(pdo) == PD_SRC_PDO_TYPE_AUGMENTED) { |
| cnt += scnprintf(&buf[cnt], PAGE_SIZE - cnt, |
| "\tProgrammable Power supply\n" |
| "\tMax Voltage:%d (mV)\n" |
| "\tMin Voltage:%d (mV)\n" |
| "\tMax Current:%d (mA)\n", |
| PD_APDO_MAX_VOLT(pdo) * 100, |
| PD_APDO_MIN_VOLT(pdo) * 100, |
| PD_APDO_MAX_CURR(pdo) * 50); |
| } else { |
| cnt += scnprintf(&buf[cnt], PAGE_SIZE - cnt, |
| "Invalid PDO\n"); |
| } |
| |
| buf[cnt++] = '\n'; |
| } |
| |
| return cnt; |
| } |
| static DEVICE_ATTR_RO(pdo_h); |
| |
| static ssize_t pdo_n_show(struct device *dev, struct device_attribute *attr, |
| char *buf); |
| |
| #define PDO_ATTR(n) { \ |
| .attr = { .name = __stringify(pdo##n), .mode = 0444 }, \ |
| .show = pdo_n_show, \ |
| } |
| static struct device_attribute dev_attr_pdos[] = { |
| PDO_ATTR(1), |
| PDO_ATTR(2), |
| PDO_ATTR(3), |
| PDO_ATTR(4), |
| PDO_ATTR(5), |
| PDO_ATTR(6), |
| PDO_ATTR(7), |
| }; |
| |
| static ssize_t pdo_n_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(dev_attr_pdos); i++) |
| if (attr == &dev_attr_pdos[i]) |
| /* dump the PDO as a hex string */ |
| return snprintf(buf, PAGE_SIZE, "%08x\n", |
| pd->received_pdos[i]); |
| |
| usbpd_err(&pd->dev, "Invalid PDO index\n"); |
| return -EINVAL; |
| } |
| |
| static ssize_t select_pdo_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t size) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| int src_cap_id; |
| int pdo, uv = 0, ua = 0; |
| int ret; |
| |
| mutex_lock(&pd->swap_lock); |
| |
| /* Only allowed if we are already in explicit sink contract */ |
| if (pd->current_state != PE_SNK_READY || !is_sink_tx_ok(pd)) { |
| usbpd_err(&pd->dev, "select_pdo: Cannot select new PDO yet\n"); |
| ret = -EBUSY; |
| goto out; |
| } |
| |
| ret = sscanf(buf, "%d %d %d %d", &src_cap_id, &pdo, &uv, &ua); |
| if (ret != 2 && ret != 4) { |
| usbpd_err(&pd->dev, "select_pdo: Must specify <src cap id> <PDO> [<uV> <uA>]\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (src_cap_id != pd->src_cap_id) { |
| usbpd_err(&pd->dev, "select_pdo: src_cap_id mismatch. Requested:%d, current:%d\n", |
| src_cap_id, pd->src_cap_id); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (pdo < 1 || pdo > 7) { |
| usbpd_err(&pd->dev, "select_pdo: invalid PDO:%d\n", pdo); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = pd_select_pdo(pd, pdo, uv, ua); |
| if (ret) |
| goto out; |
| |
| reinit_completion(&pd->is_ready); |
| pd->send_request = true; |
| kick_sm(pd, 0); |
| |
| /* wait for operation to complete */ |
| if (!wait_for_completion_timeout(&pd->is_ready, |
| msecs_to_jiffies(1000))) { |
| usbpd_err(&pd->dev, "select_pdo: request timed out\n"); |
| ret = -ETIMEDOUT; |
| goto out; |
| } |
| |
| /* determine if request was accepted/rejected */ |
| if (pd->selected_pdo != pd->requested_pdo || |
| pd->current_voltage != pd->requested_voltage) { |
| usbpd_err(&pd->dev, "select_pdo: request rejected\n"); |
| ret = -EINVAL; |
| } |
| |
| out: |
| pd->send_request = false; |
| mutex_unlock(&pd->swap_lock); |
| return ret ? ret : size; |
| } |
| |
| static ssize_t select_pdo_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%d\n", pd->selected_pdo); |
| } |
| static DEVICE_ATTR_RW(select_pdo); |
| |
| static ssize_t rdo_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| |
| /* dump the RDO as a hex string */ |
| return snprintf(buf, PAGE_SIZE, "%08x\n", pd->rdo); |
| } |
| static DEVICE_ATTR_RO(rdo); |
| |
| static ssize_t rdo_h_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| int pos = PD_RDO_OBJ_POS(pd->rdo); |
| int type = PD_SRC_PDO_TYPE(pd->received_pdos[pos]); |
| int len; |
| |
| len = scnprintf(buf, PAGE_SIZE, "Request Data Object\n" |
| "\tObj Pos:%d\n" |
| "\tGiveback:%d\n" |
| "\tCapability Mismatch:%d\n" |
| "\tUSB Communications Capable:%d\n" |
| "\tNo USB Suspend:%d\n", |
| PD_RDO_OBJ_POS(pd->rdo), |
| PD_RDO_GIVEBACK(pd->rdo), |
| PD_RDO_MISMATCH(pd->rdo), |
| PD_RDO_USB_COMM(pd->rdo), |
| PD_RDO_NO_USB_SUSP(pd->rdo)); |
| |
| switch (type) { |
| case PD_SRC_PDO_TYPE_FIXED: |
| case PD_SRC_PDO_TYPE_VARIABLE: |
| len += scnprintf(buf + len, PAGE_SIZE - len, |
| "(Fixed/Variable)\n" |
| "\tOperating Current:%d (mA)\n" |
| "\t%s Current:%d (mA)\n", |
| PD_RDO_FIXED_CURR(pd->rdo) * 10, |
| PD_RDO_GIVEBACK(pd->rdo) ? "Min" : "Max", |
| PD_RDO_FIXED_CURR_MINMAX(pd->rdo) * 10); |
| break; |
| |
| case PD_SRC_PDO_TYPE_BATTERY: |
| len += scnprintf(buf + len, PAGE_SIZE - len, |
| "(Battery)\n" |
| "\tOperating Power:%d (mW)\n" |
| "\t%s Power:%d (mW)\n", |
| PD_RDO_FIXED_CURR(pd->rdo) * 250, |
| PD_RDO_GIVEBACK(pd->rdo) ? "Min" : "Max", |
| PD_RDO_FIXED_CURR_MINMAX(pd->rdo) * 250); |
| break; |
| |
| case PD_SRC_PDO_TYPE_AUGMENTED: |
| len += scnprintf(buf + len, PAGE_SIZE - len, |
| "(Programmable)\n" |
| "\tOutput Voltage:%d (mV)\n" |
| "\tOperating Current:%d (mA)\n", |
| PD_RDO_PROG_VOLTAGE(pd->rdo) * 20, |
| PD_RDO_PROG_CURR(pd->rdo) * 50); |
| break; |
| } |
| |
| return len; |
| } |
| static DEVICE_ATTR_RO(rdo_h); |
| |
| static ssize_t hard_reset_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t size) |
| { |
| struct usbpd *pd = dev_get_drvdata(dev); |
| int val = 0; |
| |
| if (sscanf(buf, "%d\n", &val) != 1) |
| return -EINVAL; |
| |
| if (val) |
| usbpd_set_state(pd, pd->current_pr == PR_SRC ? |
| PE_SRC_HARD_RESET : PE_SNK_HARD_RESET); |
| |
| return size; |
| } |
| static DEVICE_ATTR_WO(hard_reset); |
| |
| static struct attribute *usbpd_attrs[] = { |
| &dev_attr_contract.attr, |
| &dev_attr_initial_pr.attr, |
| &dev_attr_current_pr.attr, |
| &dev_attr_initial_dr.attr, |
| &dev_attr_current_dr.attr, |
| &dev_attr_src_cap_id.attr, |
| &dev_attr_pdo_h.attr, |
| &dev_attr_pdos[0].attr, |
| &dev_attr_pdos[1].attr, |
| &dev_attr_pdos[2].attr, |
| &dev_attr_pdos[3].attr, |
| &dev_attr_pdos[4].attr, |
| &dev_attr_pdos[5].attr, |
| &dev_attr_pdos[6].attr, |
| &dev_attr_select_pdo.attr, |
| &dev_attr_rdo.attr, |
| &dev_attr_rdo_h.attr, |
| &dev_attr_hard_reset.attr, |
| NULL, |
| }; |
| ATTRIBUTE_GROUPS(usbpd); |
| |
| static struct class usbpd_class = { |
| .name = "usbpd", |
| .owner = THIS_MODULE, |
| .dev_uevent = usbpd_uevent, |
| .dev_groups = usbpd_groups, |
| }; |
| |
| static int match_usbpd_device(struct device *dev, const void *data) |
| { |
| return dev->parent == data; |
| } |
| |
| static void devm_usbpd_put(struct device *dev, void *res) |
| { |
| struct usbpd **ppd = res; |
| |
| put_device(&(*ppd)->dev); |
| } |
| |
| struct usbpd *devm_usbpd_get_by_phandle(struct device *dev, const char *phandle) |
| { |
| struct usbpd **ptr, *pd = NULL; |
| struct device_node *pd_np; |
| struct platform_device *pdev; |
| struct device *pd_dev; |
| |
| if (!usbpd_class.p) /* usbpd_init() not yet called */ |
| return ERR_PTR(-EAGAIN); |
| |
| if (!dev->of_node) |
| return ERR_PTR(-EINVAL); |
| |
| pd_np = of_parse_phandle(dev->of_node, phandle, 0); |
| if (!pd_np) |
| return ERR_PTR(-ENXIO); |
| |
| pdev = of_find_device_by_node(pd_np); |
| if (!pdev) |
| return ERR_PTR(-ENODEV); |
| |
| pd_dev = class_find_device(&usbpd_class, NULL, &pdev->dev, |
| match_usbpd_device); |
| if (!pd_dev) { |
| platform_device_put(pdev); |
| /* device was found but maybe hadn't probed yet, so defer */ |
| return ERR_PTR(-EPROBE_DEFER); |
| } |
| |
| ptr = devres_alloc(devm_usbpd_put, sizeof(*ptr), GFP_KERNEL); |
| if (!ptr) { |
| put_device(pd_dev); |
| platform_device_put(pdev); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| pd = dev_get_drvdata(pd_dev); |
| if (!pd) |
| return ERR_PTR(-EPROBE_DEFER); |
| |
| *ptr = pd; |
| devres_add(dev, ptr); |
| |
| return pd; |
| } |
| EXPORT_SYMBOL(devm_usbpd_get_by_phandle); |
| |
| static int num_pd_instances; |
| |
| /** |
| * usbpd_create - Create a new instance of USB PD protocol/policy engine |
| * @parent - parent device to associate with |
| * |
| * This creates a new usbpd class device which manages the state of a |
| * USB PD-capable port. The parent device that is passed in should be |
| * associated with the physical device port, e.g. a PD PHY. |
| * |
| * Return: struct usbpd pointer, or an ERR_PTR value |
| */ |
| struct usbpd *usbpd_create(struct device *parent) |
| { |
| int ret; |
| struct usbpd *pd; |
| |
| pd = kzalloc(sizeof(*pd), GFP_KERNEL); |
| if (!pd) |
| return ERR_PTR(-ENOMEM); |
| |
| device_initialize(&pd->dev); |
| pd->dev.class = &usbpd_class; |
| pd->dev.parent = parent; |
| dev_set_drvdata(&pd->dev, pd); |
| |
| ret = dev_set_name(&pd->dev, "usbpd%d", num_pd_instances++); |
| if (ret) |
| goto free_pd; |
| |
| ret = device_init_wakeup(&pd->dev, true); |
| if (ret) |
| goto free_pd; |
| |
| ret = device_add(&pd->dev); |
| if (ret) |
| goto free_pd; |
| |
| pd->wq = alloc_ordered_workqueue("usbpd_wq", WQ_FREEZABLE | WQ_HIGHPRI); |
| if (!pd->wq) { |
| ret = -ENOMEM; |
| goto del_pd; |
| } |
| INIT_WORK(&pd->sm_work, usbpd_sm); |
| hrtimer_init(&pd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| pd->timer.function = pd_timeout; |
| mutex_init(&pd->swap_lock); |
| |
| pd->usb_psy = power_supply_get_by_name("usb"); |
| if (!pd->usb_psy) { |
| usbpd_dbg(&pd->dev, "Could not get USB power_supply, deferring probe\n"); |
| ret = -EPROBE_DEFER; |
| goto destroy_wq; |
| } |
| |
| /* |
| * associate extcon with the parent dev as it could have a DT |
| * node which will be useful for extcon_get_edev_by_phandle() |
| */ |
| pd->extcon = devm_extcon_dev_allocate(parent, usbpd_extcon_cable); |
| if (IS_ERR(pd->extcon)) { |
| usbpd_err(&pd->dev, "failed to allocate extcon device\n"); |
| ret = PTR_ERR(pd->extcon); |
| goto put_psy; |
| } |
| |
| pd->extcon->mutually_exclusive = usbpd_extcon_exclusive; |
| ret = devm_extcon_dev_register(parent, pd->extcon); |
| if (ret) { |
| usbpd_err(&pd->dev, "failed to register extcon device\n"); |
| goto put_psy; |
| } |
| |
| /* Support reporting polarity and speed via properties */ |
| extcon_set_property_capability(pd->extcon, EXTCON_USB, |
| EXTCON_PROP_USB_TYPEC_POLARITY); |
| extcon_set_property_capability(pd->extcon, EXTCON_USB, |
| EXTCON_PROP_USB_SS); |
| extcon_set_property_capability(pd->extcon, EXTCON_USB_HOST, |
| EXTCON_PROP_USB_TYPEC_POLARITY); |
| extcon_set_property_capability(pd->extcon, EXTCON_USB_HOST, |
| EXTCON_PROP_USB_SS); |
| |
| pd->vbus = devm_regulator_get(parent, "vbus"); |
| if (IS_ERR(pd->vbus)) { |
| ret = PTR_ERR(pd->vbus); |
| goto put_psy; |
| } |
| |
| pd->vconn = devm_regulator_get(parent, "vconn"); |
| if (IS_ERR(pd->vconn)) { |
| ret = PTR_ERR(pd->vconn); |
| goto put_psy; |
| } |
| |
| pd->vconn_is_external = device_property_present(parent, |
| "qcom,vconn-uses-external-source"); |
| |
| pd->num_sink_caps = device_property_read_u32_array(parent, |
| "qcom,default-sink-caps", NULL, 0); |
| if (pd->num_sink_caps > 0) { |
| int i; |
| u32 sink_caps[14]; |
| |
| if (pd->num_sink_caps % 2 || pd->num_sink_caps > 14) { |
| ret = -EINVAL; |
| usbpd_err(&pd->dev, "default-sink-caps must be be specified as voltage/current, max 7 pairs\n"); |
| goto put_psy; |
| } |
| |
| ret = device_property_read_u32_array(parent, |
| "qcom,default-sink-caps", sink_caps, |
| pd->num_sink_caps); |
| if (ret) { |
| usbpd_err(&pd->dev, "Error reading default-sink-caps\n"); |
| goto put_psy; |
| } |
| |
| pd->num_sink_caps /= 2; |
| |
| for (i = 0; i < pd->num_sink_caps; i++) { |
| int v = sink_caps[i * 2] / 50; |
| int c = sink_caps[i * 2 + 1] / 10; |
| |
| pd->sink_caps[i] = |
| PD_SNK_PDO_FIXED(0, 0, 0, 0, 0, v, c); |
| } |
| |
| /* First PDO includes additional capabilities */ |
| pd->sink_caps[0] |= PD_SNK_PDO_FIXED(1, 0, 0, 1, 1, 0, 0); |
| } else { |
| memcpy(pd->sink_caps, default_snk_caps, |
| sizeof(default_snk_caps)); |
| pd->num_sink_caps = ARRAY_SIZE(default_snk_caps); |
| } |
| |
| /* |
| * Register the Android dual-role class (/sys/class/dual_role_usb/). |
| * The first instance should be named "otg_default" as that's what |
| * Android expects. |
| * Note this is different than the /sys/class/usbpd/ created above. |
| */ |
| pd->dr_desc.name = (num_pd_instances == 1) ? |
| "otg_default" : dev_name(&pd->dev); |
| pd->dr_desc.supported_modes = DUAL_ROLE_SUPPORTED_MODES_DFP_AND_UFP; |
| pd->dr_desc.properties = usbpd_dr_properties; |
| pd->dr_desc.num_properties = ARRAY_SIZE(usbpd_dr_properties); |
| pd->dr_desc.get_property = usbpd_dr_get_property; |
| pd->dr_desc.set_property = usbpd_dr_set_property; |
| pd->dr_desc.property_is_writeable = usbpd_dr_prop_writeable; |
| |
| pd->dual_role = devm_dual_role_instance_register(&pd->dev, |
| &pd->dr_desc); |
| if (IS_ERR(pd->dual_role)) { |
| usbpd_err(&pd->dev, "could not register dual_role instance\n"); |
| goto put_psy; |
| } else { |
| pd->dual_role->drv_data = pd; |
| } |
| |
| /* default support as PD 2.0 source or sink */ |
| pd->spec_rev = USBPD_REV_20; |
| pd->current_pr = PR_NONE; |
| pd->current_dr = DR_NONE; |
| list_add_tail(&pd->instance, &_usbpd); |
| |
| spin_lock_init(&pd->rx_lock); |
| INIT_LIST_HEAD(&pd->rx_q); |
| INIT_LIST_HEAD(&pd->svid_handlers); |
| init_completion(&pd->is_ready); |
| |
| pd->psy_nb.notifier_call = psy_changed; |
| ret = power_supply_reg_notifier(&pd->psy_nb); |
| if (ret) |
| goto del_inst; |
| |
| /* force read initial power_supply values */ |
| psy_changed(&pd->psy_nb, PSY_EVENT_PROP_CHANGED, pd->usb_psy); |
| |
| return pd; |
| |
| del_inst: |
| list_del(&pd->instance); |
| put_psy: |
| power_supply_put(pd->usb_psy); |
| destroy_wq: |
| destroy_workqueue(pd->wq); |
| del_pd: |
| device_del(&pd->dev); |
| free_pd: |
| num_pd_instances--; |
| kfree(pd); |
| return ERR_PTR(ret); |
| } |
| EXPORT_SYMBOL(usbpd_create); |
| |
| /** |
| * usbpd_destroy - Removes and frees a usbpd instance |
| * @pd: the instance to destroy |
| */ |
| void usbpd_destroy(struct usbpd *pd) |
| { |
| if (!pd) |
| return; |
| |
| list_del(&pd->instance); |
| power_supply_unreg_notifier(&pd->psy_nb); |
| power_supply_put(pd->usb_psy); |
| destroy_workqueue(pd->wq); |
| device_del(&pd->dev); |
| kfree(pd); |
| } |
| EXPORT_SYMBOL(usbpd_destroy); |
| |
| static int __init usbpd_init(void) |
| { |
| usbpd_ipc_log = ipc_log_context_create(NUM_LOG_PAGES, "usb_pd", 0); |
| return class_register(&usbpd_class); |
| } |
| module_init(usbpd_init); |
| |
| static void __exit usbpd_exit(void) |
| { |
| class_unregister(&usbpd_class); |
| } |
| module_exit(usbpd_exit); |
| |
| MODULE_DESCRIPTION("USB Power Delivery Policy Engine"); |
| MODULE_LICENSE("GPL v2"); |