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512df95b94
The commit 217504a055 ("usb: typec: ucsi: Work around PPM
losing change information") had solved this issue
previously, but in a really complex manner. The core issue
is that on some platforms the EC firmware does not interrupt
the driver on unplug event in some cases, mainly when the
cable is unplugged immediately after the plug-in.
From now on handling that problem by simply re-checking new
connections.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210920142419.54493-8-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
384 lines
13 KiB
C
384 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __DRIVER_USB_TYPEC_UCSI_H
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#define __DRIVER_USB_TYPEC_UCSI_H
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/power_supply.h>
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#include <linux/types.h>
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#include <linux/usb/typec.h>
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#include <linux/usb/pd.h>
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#include <linux/usb/role.h>
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/* -------------------------------------------------------------------------- */
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struct ucsi;
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struct ucsi_altmode;
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/* UCSI offsets (Bytes) */
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#define UCSI_VERSION 0
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#define UCSI_CCI 4
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#define UCSI_CONTROL 8
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#define UCSI_MESSAGE_IN 16
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#define UCSI_MESSAGE_OUT 32
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/* Command Status and Connector Change Indication (CCI) bits */
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#define UCSI_CCI_CONNECTOR(_c_) (((_c_) & GENMASK(7, 1)) >> 1)
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#define UCSI_CCI_LENGTH(_c_) (((_c_) & GENMASK(15, 8)) >> 8)
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#define UCSI_CCI_NOT_SUPPORTED BIT(25)
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#define UCSI_CCI_CANCEL_COMPLETE BIT(26)
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#define UCSI_CCI_RESET_COMPLETE BIT(27)
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#define UCSI_CCI_BUSY BIT(28)
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#define UCSI_CCI_ACK_COMPLETE BIT(29)
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#define UCSI_CCI_ERROR BIT(30)
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#define UCSI_CCI_COMMAND_COMPLETE BIT(31)
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/**
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* struct ucsi_operations - UCSI I/O operations
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* @read: Read operation
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* @sync_write: Blocking write operation
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* @async_write: Non-blocking write operation
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* @update_altmodes: Squashes duplicate DP altmodes
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*
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* Read and write routines for UCSI interface. @sync_write must wait for the
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* Command Completion Event from the PPM before returning, and @async_write must
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* return immediately after sending the data to the PPM.
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*/
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struct ucsi_operations {
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int (*read)(struct ucsi *ucsi, unsigned int offset,
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void *val, size_t val_len);
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int (*sync_write)(struct ucsi *ucsi, unsigned int offset,
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const void *val, size_t val_len);
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int (*async_write)(struct ucsi *ucsi, unsigned int offset,
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const void *val, size_t val_len);
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bool (*update_altmodes)(struct ucsi *ucsi, struct ucsi_altmode *orig,
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struct ucsi_altmode *updated);
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};
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struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops);
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void ucsi_destroy(struct ucsi *ucsi);
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int ucsi_register(struct ucsi *ucsi);
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void ucsi_unregister(struct ucsi *ucsi);
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void *ucsi_get_drvdata(struct ucsi *ucsi);
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void ucsi_set_drvdata(struct ucsi *ucsi, void *data);
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void ucsi_connector_change(struct ucsi *ucsi, u8 num);
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/* -------------------------------------------------------------------------- */
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/* Commands */
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#define UCSI_PPM_RESET 0x01
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#define UCSI_CANCEL 0x02
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#define UCSI_CONNECTOR_RESET 0x03
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#define UCSI_ACK_CC_CI 0x04
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#define UCSI_SET_NOTIFICATION_ENABLE 0x05
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#define UCSI_GET_CAPABILITY 0x06
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#define UCSI_GET_CONNECTOR_CAPABILITY 0x07
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#define UCSI_SET_UOM 0x08
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#define UCSI_SET_UOR 0x09
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#define UCSI_SET_PDM 0x0a
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#define UCSI_SET_PDR 0x0b
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#define UCSI_GET_ALTERNATE_MODES 0x0c
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#define UCSI_GET_CAM_SUPPORTED 0x0d
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#define UCSI_GET_CURRENT_CAM 0x0e
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#define UCSI_SET_NEW_CAM 0x0f
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#define UCSI_GET_PDOS 0x10
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#define UCSI_GET_CABLE_PROPERTY 0x11
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#define UCSI_GET_CONNECTOR_STATUS 0x12
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#define UCSI_GET_ERROR_STATUS 0x13
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#define UCSI_CONNECTOR_NUMBER(_num_) ((u64)(_num_) << 16)
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#define UCSI_COMMAND(_cmd_) ((_cmd_) & 0xff)
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/* CONNECTOR_RESET command bits */
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#define UCSI_CONNECTOR_RESET_HARD BIT(23) /* Deprecated in v1.1 */
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/* ACK_CC_CI bits */
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#define UCSI_ACK_CONNECTOR_CHANGE BIT(16)
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#define UCSI_ACK_COMMAND_COMPLETE BIT(17)
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/* SET_NOTIFICATION_ENABLE command bits */
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#define UCSI_ENABLE_NTFY_CMD_COMPLETE BIT(16)
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#define UCSI_ENABLE_NTFY_EXT_PWR_SRC_CHANGE BIT(17)
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#define UCSI_ENABLE_NTFY_PWR_OPMODE_CHANGE BIT(18)
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#define UCSI_ENABLE_NTFY_CAP_CHANGE BIT(21)
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#define UCSI_ENABLE_NTFY_PWR_LEVEL_CHANGE BIT(22)
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#define UCSI_ENABLE_NTFY_PD_RESET_COMPLETE BIT(23)
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#define UCSI_ENABLE_NTFY_CAM_CHANGE BIT(24)
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#define UCSI_ENABLE_NTFY_BAT_STATUS_CHANGE BIT(25)
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#define UCSI_ENABLE_NTFY_PARTNER_CHANGE BIT(27)
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#define UCSI_ENABLE_NTFY_PWR_DIR_CHANGE BIT(28)
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#define UCSI_ENABLE_NTFY_CONNECTOR_CHANGE BIT(30)
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#define UCSI_ENABLE_NTFY_ERROR BIT(31)
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#define UCSI_ENABLE_NTFY_ALL 0xdbe70000
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/* SET_UOR command bits */
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#define UCSI_SET_UOR_ROLE(_r_) (((_r_) == TYPEC_HOST ? 1 : 2) << 23)
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#define UCSI_SET_UOR_ACCEPT_ROLE_SWAPS BIT(25)
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/* SET_PDF command bits */
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#define UCSI_SET_PDR_ROLE(_r_) (((_r_) == TYPEC_SOURCE ? 1 : 2) << 23)
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#define UCSI_SET_PDR_ACCEPT_ROLE_SWAPS BIT(25)
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/* GET_ALTERNATE_MODES command bits */
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#define UCSI_ALTMODE_RECIPIENT(_r_) (((_r_) >> 16) & 0x7)
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#define UCSI_GET_ALTMODE_RECIPIENT(_r_) ((u64)(_r_) << 16)
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#define UCSI_RECIPIENT_CON 0
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#define UCSI_RECIPIENT_SOP 1
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#define UCSI_RECIPIENT_SOP_P 2
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#define UCSI_RECIPIENT_SOP_PP 3
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#define UCSI_GET_ALTMODE_CONNECTOR_NUMBER(_r_) ((u64)(_r_) << 24)
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#define UCSI_ALTMODE_OFFSET(_r_) (((_r_) >> 32) & 0xff)
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#define UCSI_GET_ALTMODE_OFFSET(_r_) ((u64)(_r_) << 32)
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#define UCSI_GET_ALTMODE_NUM_ALTMODES(_r_) ((u64)(_r_) << 40)
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/* GET_PDOS command bits */
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#define UCSI_GET_PDOS_PARTNER_PDO(_r_) ((u64)(_r_) << 23)
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#define UCSI_GET_PDOS_PDO_OFFSET(_r_) ((u64)(_r_) << 24)
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#define UCSI_GET_PDOS_NUM_PDOS(_r_) ((u64)(_r_) << 32)
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#define UCSI_MAX_PDOS (4)
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#define UCSI_GET_PDOS_SRC_PDOS ((u64)1 << 34)
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/* -------------------------------------------------------------------------- */
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/* Error information returned by PPM in response to GET_ERROR_STATUS command. */
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#define UCSI_ERROR_UNREGONIZED_CMD BIT(0)
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#define UCSI_ERROR_INVALID_CON_NUM BIT(1)
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#define UCSI_ERROR_INVALID_CMD_ARGUMENT BIT(2)
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#define UCSI_ERROR_INCOMPATIBLE_PARTNER BIT(3)
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#define UCSI_ERROR_CC_COMMUNICATION_ERR BIT(4)
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#define UCSI_ERROR_DEAD_BATTERY BIT(5)
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#define UCSI_ERROR_CONTRACT_NEGOTIATION_FAIL BIT(6)
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#define UCSI_ERROR_OVERCURRENT BIT(7)
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#define UCSI_ERROR_UNDEFINED BIT(8)
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#define UCSI_ERROR_PARTNER_REJECTED_SWAP BIT(9)
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#define UCSI_ERROR_HARD_RESET BIT(10)
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#define UCSI_ERROR_PPM_POLICY_CONFLICT BIT(11)
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#define UCSI_ERROR_SWAP_REJECTED BIT(12)
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#define UCSI_SET_NEW_CAM_ENTER(x) (((x) >> 23) & 0x1)
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#define UCSI_SET_NEW_CAM_GET_AM(x) (((x) >> 24) & 0xff)
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#define UCSI_SET_NEW_CAM_AM_MASK (0xff << 24)
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#define UCSI_SET_NEW_CAM_SET_AM(x) (((x) & 0xff) << 24)
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#define UCSI_CMD_CONNECTOR_MASK (0x7)
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/* Data structure filled by PPM in response to GET_CAPABILITY command. */
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struct ucsi_capability {
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u32 attributes;
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#define UCSI_CAP_ATTR_DISABLE_STATE BIT(0)
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#define UCSI_CAP_ATTR_BATTERY_CHARGING BIT(1)
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#define UCSI_CAP_ATTR_USB_PD BIT(2)
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#define UCSI_CAP_ATTR_TYPEC_CURRENT BIT(6)
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#define UCSI_CAP_ATTR_POWER_AC_SUPPLY BIT(8)
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#define UCSI_CAP_ATTR_POWER_OTHER BIT(10)
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#define UCSI_CAP_ATTR_POWER_VBUS BIT(14)
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u8 num_connectors;
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u8 features;
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#define UCSI_CAP_SET_UOM BIT(0)
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#define UCSI_CAP_SET_PDM BIT(1)
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#define UCSI_CAP_ALT_MODE_DETAILS BIT(2)
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#define UCSI_CAP_ALT_MODE_OVERRIDE BIT(3)
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#define UCSI_CAP_PDO_DETAILS BIT(4)
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#define UCSI_CAP_CABLE_DETAILS BIT(5)
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#define UCSI_CAP_EXT_SUPPLY_NOTIFICATIONS BIT(6)
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#define UCSI_CAP_PD_RESET BIT(7)
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u16 reserved_1;
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u8 num_alt_modes;
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u8 reserved_2;
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u16 bc_version;
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u16 pd_version;
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u16 typec_version;
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} __packed;
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/* Data structure filled by PPM in response to GET_CONNECTOR_CAPABILITY cmd. */
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struct ucsi_connector_capability {
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u8 op_mode;
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#define UCSI_CONCAP_OPMODE_DFP BIT(0)
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#define UCSI_CONCAP_OPMODE_UFP BIT(1)
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#define UCSI_CONCAP_OPMODE_DRP BIT(2)
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#define UCSI_CONCAP_OPMODE_AUDIO_ACCESSORY BIT(3)
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#define UCSI_CONCAP_OPMODE_DEBUG_ACCESSORY BIT(4)
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#define UCSI_CONCAP_OPMODE_USB2 BIT(5)
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#define UCSI_CONCAP_OPMODE_USB3 BIT(6)
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#define UCSI_CONCAP_OPMODE_ALT_MODE BIT(7)
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u8 flags;
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#define UCSI_CONCAP_FLAG_PROVIDER BIT(0)
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#define UCSI_CONCAP_FLAG_CONSUMER BIT(1)
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} __packed;
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struct ucsi_altmode {
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u16 svid;
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u32 mid;
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} __packed;
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/* Data structure filled by PPM in response to GET_CABLE_PROPERTY command. */
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struct ucsi_cable_property {
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u16 speed_supported;
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u8 current_capability;
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u8 flags;
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#define UCSI_CABLE_PROP_FLAG_VBUS_IN_CABLE BIT(0)
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#define UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE BIT(1)
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#define UCSI_CABLE_PROP_FLAG_DIRECTIONALITY BIT(2)
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#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_) ((_f_) & GENMASK(3, 0))
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#define UCSI_CABLE_PROPERTY_PLUG_TYPE_A 0
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#define UCSI_CABLE_PROPERTY_PLUG_TYPE_B 1
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#define UCSI_CABLE_PROPERTY_PLUG_TYPE_C 2
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#define UCSI_CABLE_PROPERTY_PLUG_OTHER 3
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#define UCSI_CABLE_PROP_MODE_SUPPORT BIT(5)
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u8 latency;
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} __packed;
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/* Data structure filled by PPM in response to GET_CONNECTOR_STATUS command. */
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struct ucsi_connector_status {
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u16 change;
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#define UCSI_CONSTAT_EXT_SUPPLY_CHANGE BIT(1)
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#define UCSI_CONSTAT_POWER_OPMODE_CHANGE BIT(2)
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#define UCSI_CONSTAT_PDOS_CHANGE BIT(5)
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#define UCSI_CONSTAT_POWER_LEVEL_CHANGE BIT(6)
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#define UCSI_CONSTAT_PD_RESET_COMPLETE BIT(7)
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#define UCSI_CONSTAT_CAM_CHANGE BIT(8)
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#define UCSI_CONSTAT_BC_CHANGE BIT(9)
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#define UCSI_CONSTAT_PARTNER_CHANGE BIT(11)
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#define UCSI_CONSTAT_POWER_DIR_CHANGE BIT(12)
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#define UCSI_CONSTAT_CONNECT_CHANGE BIT(14)
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#define UCSI_CONSTAT_ERROR BIT(15)
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u16 flags;
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#define UCSI_CONSTAT_PWR_OPMODE(_f_) ((_f_) & GENMASK(2, 0))
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#define UCSI_CONSTAT_PWR_OPMODE_NONE 0
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#define UCSI_CONSTAT_PWR_OPMODE_DEFAULT 1
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#define UCSI_CONSTAT_PWR_OPMODE_BC 2
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#define UCSI_CONSTAT_PWR_OPMODE_PD 3
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#define UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5 4
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#define UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0 5
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#define UCSI_CONSTAT_CONNECTED BIT(3)
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#define UCSI_CONSTAT_PWR_DIR BIT(4)
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#define UCSI_CONSTAT_PARTNER_FLAGS(_f_) (((_f_) & GENMASK(12, 5)) >> 5)
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#define UCSI_CONSTAT_PARTNER_FLAG_USB 1
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#define UCSI_CONSTAT_PARTNER_FLAG_ALT_MODE 2
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#define UCSI_CONSTAT_PARTNER_TYPE(_f_) (((_f_) & GENMASK(15, 13)) >> 13)
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#define UCSI_CONSTAT_PARTNER_TYPE_DFP 1
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#define UCSI_CONSTAT_PARTNER_TYPE_UFP 2
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#define UCSI_CONSTAT_PARTNER_TYPE_CABLE 3 /* Powered Cable */
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#define UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP 4 /* Powered Cable */
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#define UCSI_CONSTAT_PARTNER_TYPE_DEBUG 5
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#define UCSI_CONSTAT_PARTNER_TYPE_AUDIO 6
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u32 request_data_obj;
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u8 pwr_status;
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#define UCSI_CONSTAT_BC_STATUS(_p_) ((_p_) & GENMASK(2, 0))
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#define UCSI_CONSTAT_BC_NOT_CHARGING 0
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#define UCSI_CONSTAT_BC_NOMINAL_CHARGING 1
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#define UCSI_CONSTAT_BC_SLOW_CHARGING 2
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#define UCSI_CONSTAT_BC_TRICKLE_CHARGING 3
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#define UCSI_CONSTAT_PROVIDER_CAP_LIMIT(_p_) (((_p_) & GENMASK(6, 3)) >> 3)
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#define UCSI_CONSTAT_CAP_PWR_LOWERED 0
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#define UCSI_CONSTAT_CAP_PWR_BUDGET_LIMIT 1
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} __packed;
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/* -------------------------------------------------------------------------- */
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struct ucsi {
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u16 version;
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struct device *dev;
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struct driver_data *driver_data;
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const struct ucsi_operations *ops;
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struct ucsi_capability cap;
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struct ucsi_connector *connector;
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struct work_struct work;
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/* PPM Communication lock */
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struct mutex ppm_lock;
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/* The latest "Notification Enable" bits (SET_NOTIFICATION_ENABLE) */
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u64 ntfy;
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/* PPM communication flags */
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unsigned long flags;
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#define EVENT_PENDING 0
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#define COMMAND_PENDING 1
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#define ACK_PENDING 2
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};
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#define UCSI_MAX_SVID 5
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#define UCSI_MAX_ALTMODES (UCSI_MAX_SVID * 6)
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#define UCSI_TYPEC_VSAFE5V 5000
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#define UCSI_TYPEC_1_5_CURRENT 1500
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#define UCSI_TYPEC_3_0_CURRENT 3000
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struct ucsi_connector {
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int num;
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struct ucsi *ucsi;
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struct mutex lock; /* port lock */
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struct work_struct work;
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struct completion complete;
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struct workqueue_struct *wq;
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struct typec_port *port;
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struct typec_partner *partner;
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struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
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struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
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struct typec_capability typec_cap;
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struct ucsi_connector_status status;
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struct ucsi_connector_capability cap;
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struct power_supply *psy;
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struct power_supply_desc psy_desc;
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u32 rdo;
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u32 src_pdos[PDO_MAX_OBJECTS];
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int num_pdos;
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struct usb_role_switch *usb_role_sw;
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};
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int ucsi_send_command(struct ucsi *ucsi, u64 command,
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void *retval, size_t size);
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void ucsi_altmode_update_active(struct ucsi_connector *con);
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int ucsi_resume(struct ucsi *ucsi);
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#if IS_ENABLED(CONFIG_POWER_SUPPLY)
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int ucsi_register_port_psy(struct ucsi_connector *con);
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void ucsi_unregister_port_psy(struct ucsi_connector *con);
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void ucsi_port_psy_changed(struct ucsi_connector *con);
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#else
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static inline int ucsi_register_port_psy(struct ucsi_connector *con) { return 0; }
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static inline void ucsi_unregister_port_psy(struct ucsi_connector *con) { }
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static inline void ucsi_port_psy_changed(struct ucsi_connector *con) { }
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#endif /* CONFIG_POWER_SUPPLY */
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#if IS_ENABLED(CONFIG_TYPEC_DP_ALTMODE)
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struct typec_altmode *
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ucsi_register_displayport(struct ucsi_connector *con,
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bool override, int offset,
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struct typec_altmode_desc *desc);
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void ucsi_displayport_remove_partner(struct typec_altmode *adev);
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#else
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static inline struct typec_altmode *
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ucsi_register_displayport(struct ucsi_connector *con,
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bool override, int offset,
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struct typec_altmode_desc *desc)
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{
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return NULL;
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}
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static inline void
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ucsi_displayport_remove_partner(struct typec_altmode *adev) { }
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#endif /* CONFIG_TYPEC_DP_ALTMODE */
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/*
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* NVIDIA VirtualLink (svid 0x955) has two altmode. VirtualLink
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* DP mode with vdo=0x1 and NVIDIA test mode with vdo=0x3
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*/
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#define USB_TYPEC_NVIDIA_VLINK_DP_VDO 0x1
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#define USB_TYPEC_NVIDIA_VLINK_DBG_VDO 0x3
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#endif /* __DRIVER_USB_TYPEC_UCSI_H */
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