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-rw-r--r--drivers/usb/common/Kconfig51
-rw-r--r--drivers/usb/common/Makefile2
-rw-r--r--drivers/usb/common/common.c194
-rw-r--r--drivers/usb/common/common.h14
-rw-r--r--drivers/usb/common/debug.c319
-rw-r--r--drivers/usb/common/led.c13
-rw-r--r--drivers/usb/common/ulpi.c95
-rw-r--r--drivers/usb/common/usb-conn-gpio.c375
-rw-r--r--drivers/usb/common/usb-otg-fsm.c7
9 files changed, 1033 insertions, 37 deletions
diff --git a/drivers/usb/common/Kconfig b/drivers/usb/common/Kconfig
new file mode 100644
index 000000000000..b856622431a7
--- /dev/null
+++ b/drivers/usb/common/Kconfig
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config USB_COMMON
+ tristate
+
+
+config USB_LED_TRIG
+ bool "USB LED Triggers"
+ depends on LEDS_CLASS && USB_COMMON && LEDS_TRIGGERS
+ help
+ This option adds LED triggers for USB host and/or gadget activity.
+
+ Say Y here if you are working on a system with led-class supported
+ LEDs and you want to use them as activity indicators for USB host or
+ gadget.
+
+config USB_ULPI_BUS
+ tristate "USB ULPI PHY interface support"
+ select USB_COMMON
+ help
+ UTMI+ Low Pin Interface (ULPI) is specification for a commonly used
+ USB 2.0 PHY interface. The ULPI specification defines a standard set
+ of registers that can be used to detect the vendor and product which
+ allows ULPI to be handled as a bus. This module is the driver for that
+ bus.
+
+ The ULPI interfaces (the buses) are registered by the drivers for USB
+ controllers which support ULPI register access and have ULPI PHY
+ attached to them. The ULPI PHY drivers themselves are normal PHY
+ drivers.
+
+ ULPI PHYs provide often functions such as ADP sensing/probing (OTG
+ protocol) and USB charger detection.
+
+ To compile this driver as a module, choose M here: the module will
+ be called ulpi.
+
+config USB_CONN_GPIO
+ tristate "USB GPIO Based Connection Detection Driver"
+ depends on GPIOLIB
+ select USB_ROLE_SWITCH
+ select POWER_SUPPLY
+ help
+ The driver supports USB role switch between host and device via GPIO
+ based USB cable detection, used typically if an input GPIO is used
+ to detect USB ID pin, and another input GPIO may be also used to detect
+ Vbus pin at the same time, it also can be used to enable/disable
+ device if an input GPIO is only used to detect Vbus pin.
+
+ To compile the driver as a module, choose M here: the module will
+ be called usb-conn-gpio.ko
diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
index 0a7c45e85481..8ac4d21ef5c8 100644
--- a/drivers/usb/common/Makefile
+++ b/drivers/usb/common/Makefile
@@ -5,7 +5,9 @@
obj-$(CONFIG_USB_COMMON) += usb-common.o
usb-common-y += common.o
+usb-common-$(CONFIG_TRACING) += debug.o
usb-common-$(CONFIG_USB_LED_TRIG) += led.o
+obj-$(CONFIG_USB_CONN_GPIO) += usb-conn-gpio.o
obj-$(CONFIG_USB_OTG_FSM) += usb-otg-fsm.o
obj-$(CONFIG_USB_ULPI_BUS) += ulpi.o
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 48277bbc15e4..fc0845f681be 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -11,11 +11,42 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/of.h>
#include <linux/usb/otg.h>
#include <linux/of_platform.h>
+#include <linux/debugfs.h>
+#include "common.h"
+
+static const char *const ep_type_names[] = {
+ [USB_ENDPOINT_XFER_CONTROL] = "ctrl",
+ [USB_ENDPOINT_XFER_ISOC] = "isoc",
+ [USB_ENDPOINT_XFER_BULK] = "bulk",
+ [USB_ENDPOINT_XFER_INT] = "intr",
+};
+
+/**
+ * usb_ep_type_string() - Returns human readable-name of the endpoint type.
+ * @ep_type: The endpoint type to return human-readable name for. If it's not
+ * any of the types: USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT},
+ * usually got by usb_endpoint_type(), the string 'unknown' will be returned.
+ */
+const char *usb_ep_type_string(int ep_type)
+{
+ if (ep_type < 0 || ep_type >= ARRAY_SIZE(ep_type_names))
+ return "unknown";
+ return ep_type_names[ep_type];
+}
+EXPORT_SYMBOL_GPL(usb_ep_type_string);
+
+/**
+ * usb_otg_state_string() - returns human readable name of OTG state.
+ * @state: the OTG state to return the human readable name of. If it's not
+ * any of the states defined in usb_otg_state enum, 'UNDEFINED' will be
+ * returned.
+ */
const char *usb_otg_state_string(enum usb_otg_state state)
{
static const char *const names[] = {
@@ -51,6 +82,19 @@ static const char *const speed_names[] = {
[USB_SPEED_SUPER_PLUS] = "super-speed-plus",
};
+static const char *const ssp_rate[] = {
+ [USB_SSP_GEN_UNKNOWN] = "UNKNOWN",
+ [USB_SSP_GEN_2x1] = "super-speed-plus-gen2x1",
+ [USB_SSP_GEN_1x2] = "super-speed-plus-gen1x2",
+ [USB_SSP_GEN_2x2] = "super-speed-plus-gen2x2",
+};
+
+/**
+ * usb_speed_string() - Returns human readable-name of the speed.
+ * @speed: The speed to return human-readable name for. If it's not
+ * any of the speeds defined in usb_device_speed enum, string for
+ * USB_SPEED_UNKNOWN will be returned.
+ */
const char *usb_speed_string(enum usb_device_speed speed)
{
if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
@@ -59,21 +103,60 @@ const char *usb_speed_string(enum usb_device_speed speed)
}
EXPORT_SYMBOL_GPL(usb_speed_string);
+/**
+ * usb_get_maximum_speed - Get maximum requested speed for a given USB
+ * controller.
+ * @dev: Pointer to the given USB controller device
+ *
+ * The function gets the maximum speed string from property "maximum-speed",
+ * and returns the corresponding enum usb_device_speed.
+ */
enum usb_device_speed usb_get_maximum_speed(struct device *dev)
{
+ const char *p = "maximum-speed";
+ int ret;
+
+ ret = device_property_match_property_string(dev, p, ssp_rate, ARRAY_SIZE(ssp_rate));
+ if (ret > 0)
+ return USB_SPEED_SUPER_PLUS;
+
+ ret = device_property_match_property_string(dev, p, speed_names, ARRAY_SIZE(speed_names));
+ if (ret > 0)
+ return ret;
+
+ return USB_SPEED_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
+
+/**
+ * usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count
+ * of a SuperSpeed Plus capable device.
+ * @dev: Pointer to the given USB controller device
+ *
+ * If the string from "maximum-speed" property is super-speed-plus-genXxY where
+ * 'X' is the generation number and 'Y' is the number of lanes, then this
+ * function returns the corresponding enum usb_ssp_rate.
+ */
+enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev)
+{
const char *maximum_speed;
int ret;
ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);
if (ret < 0)
- return USB_SPEED_UNKNOWN;
+ return USB_SSP_GEN_UNKNOWN;
- ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
-
- return (ret < 0) ? USB_SPEED_UNKNOWN : ret;
+ ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
+ return (ret < 0) ? USB_SSP_GEN_UNKNOWN : ret;
}
-EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
+EXPORT_SYMBOL_GPL(usb_get_maximum_ssp_rate);
+/**
+ * usb_state_string - Returns human readable name for the state.
+ * @state: The state to return a human-readable name for. If it's not
+ * any of the states devices in usb_device_state_string enum,
+ * the string UNKNOWN will be returned.
+ */
const char *usb_state_string(enum usb_device_state state)
{
static const char *const names[] = {
@@ -102,6 +185,14 @@ static const char *const usb_dr_modes[] = {
[USB_DR_MODE_OTG] = "otg",
};
+/**
+ * usb_get_dr_mode_from_string() - Get dual role mode for given string
+ * @str: String to find the corresponding dual role mode for
+ *
+ * This function performs a lookup for the given string and returns the
+ * corresponding enum usb_dr_mode. If no match for the string could be found,
+ * 'USB_DR_MODE_UNKNOWN' is returned.
+ */
static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
{
int ret;
@@ -123,6 +214,67 @@ enum usb_dr_mode usb_get_dr_mode(struct device *dev)
}
EXPORT_SYMBOL_GPL(usb_get_dr_mode);
+/**
+ * usb_get_role_switch_default_mode - Get default mode for given device
+ * @dev: Pointer to the given device
+ *
+ * The function gets string from property 'role-switch-default-mode',
+ * and returns the corresponding enum usb_dr_mode.
+ */
+enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev)
+{
+ const char *str;
+ int ret;
+
+ ret = device_property_read_string(dev, "role-switch-default-mode", &str);
+ if (ret < 0)
+ return USB_DR_MODE_UNKNOWN;
+
+ return usb_get_dr_mode_from_string(str);
+}
+EXPORT_SYMBOL_GPL(usb_get_role_switch_default_mode);
+
+/**
+ * usb_decode_interval - Decode bInterval into the time expressed in 1us unit
+ * @epd: The descriptor of the endpoint
+ * @speed: The speed that the endpoint works as
+ *
+ * Function returns the interval expressed in 1us unit for servicing
+ * endpoint for data transfers.
+ */
+unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd,
+ enum usb_device_speed speed)
+{
+ unsigned int interval = 0;
+
+ switch (usb_endpoint_type(epd)) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ /* uframes per NAK */
+ if (speed == USB_SPEED_HIGH)
+ interval = epd->bInterval;
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ interval = 1 << (epd->bInterval - 1);
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ /* uframes per NAK */
+ if (speed == USB_SPEED_HIGH && usb_endpoint_dir_out(epd))
+ interval = epd->bInterval;
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ if (speed >= USB_SPEED_HIGH)
+ interval = 1 << (epd->bInterval - 1);
+ else
+ interval = epd->bInterval;
+ break;
+ }
+
+ interval *= (speed >= USB_SPEED_HIGH) ? 125 : 1000;
+
+ return interval;
+}
+EXPORT_SYMBOL_GPL(usb_decode_interval);
+
#ifdef CONFIG_OF
/**
* of_usb_get_dr_mode_by_phy - Get dual role mode for the controller device
@@ -137,14 +289,15 @@ EXPORT_SYMBOL_GPL(usb_get_dr_mode);
*/
enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0)
{
- struct device_node *controller = NULL;
+ struct device_node *controller;
struct of_phandle_args args;
const char *dr_mode;
int index;
int err;
- do {
- controller = of_find_node_with_property(controller, "phys");
+ for_each_node_with_property(controller, "phys") {
+ if (!of_device_is_available(controller))
+ continue;
index = 0;
do {
if (arg0 == -1) {
@@ -165,7 +318,7 @@ enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0)
goto finish;
index++;
} while (args.np);
- } while (controller);
+ }
finish:
err = of_property_read_string(controller, "dr_mode", &dr_mode);
@@ -273,4 +426,27 @@ struct device *usb_of_get_companion_dev(struct device *dev)
EXPORT_SYMBOL_GPL(usb_of_get_companion_dev);
#endif
+struct dentry *usb_debug_root;
+EXPORT_SYMBOL_GPL(usb_debug_root);
+
+DEFINE_MUTEX(usb_dynids_lock);
+EXPORT_SYMBOL_GPL(usb_dynids_lock);
+
+static int __init usb_common_init(void)
+{
+ usb_debug_root = debugfs_create_dir("usb", NULL);
+ ledtrig_usb_init();
+ return 0;
+}
+
+static void __exit usb_common_exit(void)
+{
+ ledtrig_usb_exit();
+ debugfs_remove_recursive(usb_debug_root);
+}
+
+subsys_initcall(usb_common_init);
+module_exit(usb_common_exit);
+
+MODULE_DESCRIPTION("Common code for host and device side USB");
MODULE_LICENSE("GPL");
diff --git a/drivers/usb/common/common.h b/drivers/usb/common/common.h
new file mode 100644
index 000000000000..424a91316a4b
--- /dev/null
+++ b/drivers/usb/common/common.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LINUX_USB_COMMON_H
+#define __LINUX_USB_COMMON_H
+
+#if defined(CONFIG_USB_LED_TRIG)
+void ledtrig_usb_init(void);
+void ledtrig_usb_exit(void);
+#else
+static inline void ledtrig_usb_init(void) { }
+static inline void ledtrig_usb_exit(void) { }
+#endif
+
+#endif /* __LINUX_USB_COMMON_H */
diff --git a/drivers/usb/common/debug.c b/drivers/usb/common/debug.c
new file mode 100644
index 000000000000..f204cec8d380
--- /dev/null
+++ b/drivers/usb/common/debug.c
@@ -0,0 +1,319 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Common USB debugging functions
+ *
+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/usb/ch9.h>
+
+static void usb_decode_get_status(__u8 bRequestType, __u16 wIndex,
+ __u16 wLength, char *str, size_t size)
+{
+ switch (bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ snprintf(str, size, "Get Device Status(Length = %d)", wLength);
+ break;
+ case USB_RECIP_INTERFACE:
+ snprintf(str, size,
+ "Get Interface Status(Intf = %d, Length = %d)",
+ wIndex, wLength);
+ break;
+ case USB_RECIP_ENDPOINT:
+ snprintf(str, size, "Get Endpoint Status(ep%d%s)",
+ wIndex & ~USB_DIR_IN,
+ wIndex & USB_DIR_IN ? "in" : "out");
+ break;
+ }
+}
+
+static const char *usb_decode_device_feature(u16 wValue)
+{
+ switch (wValue) {
+ case USB_DEVICE_SELF_POWERED:
+ return "Self Powered";
+ case USB_DEVICE_REMOTE_WAKEUP:
+ return "Remote Wakeup";
+ case USB_DEVICE_TEST_MODE:
+ return "Test Mode";
+ case USB_DEVICE_U1_ENABLE:
+ return "U1 Enable";
+ case USB_DEVICE_U2_ENABLE:
+ return "U2 Enable";
+ case USB_DEVICE_LTM_ENABLE:
+ return "LTM Enable";
+ default:
+ return "UNKNOWN";
+ }
+}
+
+static const char *usb_decode_test_mode(u16 wIndex)
+{
+ switch (wIndex) {
+ case USB_TEST_J:
+ return ": TEST_J";
+ case USB_TEST_K:
+ return ": TEST_K";
+ case USB_TEST_SE0_NAK:
+ return ": TEST_SE0_NAK";
+ case USB_TEST_PACKET:
+ return ": TEST_PACKET";
+ case USB_TEST_FORCE_ENABLE:
+ return ": TEST_FORCE_EN";
+ default:
+ return ": UNKNOWN";
+ }
+}
+
+static void usb_decode_set_clear_feature(__u8 bRequestType,
+ __u8 bRequest, __u16 wValue,
+ __u16 wIndex, char *str, size_t size)
+{
+ switch (bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ snprintf(str, size, "%s Device Feature(%s%s)",
+ bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+ usb_decode_device_feature(wValue),
+ wValue == USB_DEVICE_TEST_MODE ?
+ usb_decode_test_mode(wIndex) : "");
+ break;
+ case USB_RECIP_INTERFACE:
+ snprintf(str, size, "%s Interface Feature(%s)",
+ bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+ wValue == USB_INTRF_FUNC_SUSPEND ?
+ "Function Suspend" : "UNKNOWN");
+ break;
+ case USB_RECIP_ENDPOINT:
+ snprintf(str, size, "%s Endpoint Feature(%s ep%d%s)",
+ bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+ wValue == USB_ENDPOINT_HALT ? "Halt" : "UNKNOWN",
+ wIndex & ~USB_DIR_IN,
+ wIndex & USB_DIR_IN ? "in" : "out");
+ break;
+ }
+}
+
+static void usb_decode_set_address(__u16 wValue, char *str, size_t size)
+{
+ snprintf(str, size, "Set Address(Addr = %02x)", wValue);
+}
+
+static void usb_decode_get_set_descriptor(__u8 bRequestType, __u8 bRequest,
+ __u16 wValue, __u16 wIndex,
+ __u16 wLength, char *str, size_t size)
+{
+ char *s;
+
+ switch (wValue >> 8) {
+ case USB_DT_DEVICE:
+ s = "Device";
+ break;
+ case USB_DT_CONFIG:
+ s = "Configuration";
+ break;
+ case USB_DT_STRING:
+ s = "String";
+ break;
+ case USB_DT_INTERFACE:
+ s = "Interface";
+ break;
+ case USB_DT_ENDPOINT:
+ s = "Endpoint";
+ break;
+ case USB_DT_DEVICE_QUALIFIER:
+ s = "Device Qualifier";
+ break;
+ case USB_DT_OTHER_SPEED_CONFIG:
+ s = "Other Speed Config";
+ break;
+ case USB_DT_INTERFACE_POWER:
+ s = "Interface Power";
+ break;
+ case USB_DT_OTG:
+ s = "OTG";
+ break;
+ case USB_DT_DEBUG:
+ s = "Debug";
+ break;
+ case USB_DT_INTERFACE_ASSOCIATION:
+ s = "Interface Association";
+ break;
+ case USB_DT_BOS:
+ s = "BOS";
+ break;
+ case USB_DT_DEVICE_CAPABILITY:
+ s = "Device Capability";
+ break;
+ case USB_DT_PIPE_USAGE:
+ s = "Pipe Usage";
+ break;
+ case USB_DT_SS_ENDPOINT_COMP:
+ s = "SS Endpoint Companion";
+ break;
+ case USB_DT_SSP_ISOC_ENDPOINT_COMP:
+ s = "SSP Isochronous Endpoint Companion";
+ break;
+ default:
+ s = "UNKNOWN";
+ break;
+ }
+
+ snprintf(str, size, "%s %s Descriptor(Index = %d, Length = %d)",
+ bRequest == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set",
+ s, wValue & 0xff, wLength);
+}
+
+static void usb_decode_get_configuration(__u16 wLength, char *str, size_t size)
+{
+ snprintf(str, size, "Get Configuration(Length = %d)", wLength);
+}
+
+static void usb_decode_set_configuration(__u8 wValue, char *str, size_t size)
+{
+ snprintf(str, size, "Set Configuration(Config = %d)", wValue);
+}
+
+static void usb_decode_get_intf(__u16 wIndex, __u16 wLength, char *str,
+ size_t size)
+{
+ snprintf(str, size, "Get Interface(Intf = %d, Length = %d)",
+ wIndex, wLength);
+}
+
+static void usb_decode_set_intf(__u8 wValue, __u16 wIndex, char *str,
+ size_t size)
+{
+ snprintf(str, size, "Set Interface(Intf = %d, Alt.Setting = %d)",
+ wIndex, wValue);
+}
+
+static void usb_decode_synch_frame(__u16 wIndex, __u16 wLength,
+ char *str, size_t size)
+{
+ snprintf(str, size, "Synch Frame(Endpoint = %d, Length = %d)",
+ wIndex, wLength);
+}
+
+static void usb_decode_set_sel(__u16 wLength, char *str, size_t size)
+{
+ snprintf(str, size, "Set SEL(Length = %d)", wLength);
+}
+
+static void usb_decode_set_isoch_delay(__u8 wValue, char *str, size_t size)
+{
+ snprintf(str, size, "Set Isochronous Delay(Delay = %d ns)", wValue);
+}
+
+static void usb_decode_ctrl_generic(char *str, size_t size, __u8 bRequestType,
+ __u8 bRequest, __u16 wValue, __u16 wIndex,
+ __u16 wLength)
+{
+ u8 recip = bRequestType & USB_RECIP_MASK;
+ u8 type = bRequestType & USB_TYPE_MASK;
+
+ snprintf(str, size,
+ "Type=%s Recipient=%s Dir=%s bRequest=%u wValue=%u wIndex=%u wLength=%u",
+ (type == USB_TYPE_STANDARD) ? "Standard" :
+ (type == USB_TYPE_VENDOR) ? "Vendor" :
+ (type == USB_TYPE_CLASS) ? "Class" : "Unknown",
+ (recip == USB_RECIP_DEVICE) ? "Device" :
+ (recip == USB_RECIP_INTERFACE) ? "Interface" :
+ (recip == USB_RECIP_ENDPOINT) ? "Endpoint" : "Unknown",
+ (bRequestType & USB_DIR_IN) ? "IN" : "OUT",
+ bRequest, wValue, wIndex, wLength);
+}
+
+static void usb_decode_ctrl_standard(char *str, size_t size, __u8 bRequestType,
+ __u8 bRequest, __u16 wValue, __u16 wIndex,
+ __u16 wLength)
+{
+ switch (bRequest) {
+ case USB_REQ_GET_STATUS:
+ usb_decode_get_status(bRequestType, wIndex, wLength, str, size);
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ case USB_REQ_SET_FEATURE:
+ usb_decode_set_clear_feature(bRequestType, bRequest, wValue,
+ wIndex, str, size);
+ break;
+ case USB_REQ_SET_ADDRESS:
+ usb_decode_set_address(wValue, str, size);
+ break;
+ case USB_REQ_GET_DESCRIPTOR:
+ case USB_REQ_SET_DESCRIPTOR:
+ usb_decode_get_set_descriptor(bRequestType, bRequest, wValue,
+ wIndex, wLength, str, size);
+ break;
+ case USB_REQ_GET_CONFIGURATION:
+ usb_decode_get_configuration(wLength, str, size);
+ break;
+ case USB_REQ_SET_CONFIGURATION:
+ usb_decode_set_configuration(wValue, str, size);
+ break;
+ case USB_REQ_GET_INTERFACE:
+ usb_decode_get_intf(wIndex, wLength, str, size);
+ break;
+ case USB_REQ_SET_INTERFACE:
+ usb_decode_set_intf(wValue, wIndex, str, size);
+ break;
+ case USB_REQ_SYNCH_FRAME:
+ usb_decode_synch_frame(wIndex, wLength, str, size);
+ break;
+ case USB_REQ_SET_SEL:
+ usb_decode_set_sel(wLength, str, size);
+ break;
+ case USB_REQ_SET_ISOCH_DELAY:
+ usb_decode_set_isoch_delay(wValue, str, size);
+ break;
+ default:
+ usb_decode_ctrl_generic(str, size, bRequestType, bRequest,
+ wValue, wIndex, wLength);
+ break;
+ }
+}
+
+/**
+ * usb_decode_ctrl - Returns human readable representation of control request.
+ * @str: buffer to return a human-readable representation of control request.
+ * This buffer should have about 200 bytes.
+ * @size: size of str buffer.
+ * @bRequestType: matches the USB bmRequestType field
+ * @bRequest: matches the USB bRequest field
+ * @wValue: matches the USB wValue field (CPU byte order)
+ * @wIndex: matches the USB wIndex field (CPU byte order)
+ * @wLength: matches the USB wLength field (CPU byte order)
+ *
+ * Function returns decoded, formatted and human-readable description of
+ * control request packet.
+ *
+ * The usage scenario for this is for tracepoints, so function as a return
+ * use the same value as in parameters. This approach allows to use this
+ * function in TP_printk
+ *
+ * Important: wValue, wIndex, wLength parameters before invoking this function
+ * should be processed by le16_to_cpu macro.
+ */
+const char *usb_decode_ctrl(char *str, size_t size, __u8 bRequestType,
+ __u8 bRequest, __u16 wValue, __u16 wIndex,
+ __u16 wLength)
+{
+ switch (bRequestType & USB_TYPE_MASK) {
+ case USB_TYPE_STANDARD:
+ usb_decode_ctrl_standard(str, size, bRequestType, bRequest,
+ wValue, wIndex, wLength);
+ break;
+ case USB_TYPE_VENDOR:
+ case USB_TYPE_CLASS:
+ default:
+ usb_decode_ctrl_generic(str, size, bRequestType, bRequest,
+ wValue, wIndex, wLength);
+ break;
+ }
+
+ return str;
+}
+EXPORT_SYMBOL_GPL(usb_decode_ctrl);
diff --git a/drivers/usb/common/led.c b/drivers/usb/common/led.c
index 7bd81166b77d..1de18d90b134 100644
--- a/drivers/usb/common/led.c
+++ b/drivers/usb/common/led.c
@@ -10,11 +10,10 @@
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/usb.h>
+#include "common.h"
#define BLINK_DELAY 30
-static unsigned long usb_blink_delay = BLINK_DELAY;
-
DEFINE_LED_TRIGGER(ledtrig_usb_gadget);
DEFINE_LED_TRIGGER(ledtrig_usb_host);
@@ -31,23 +30,19 @@ void usb_led_activity(enum usb_led_event ev)
break;
}
/* led_trigger_blink_oneshot() handles trig == NULL gracefully */
- led_trigger_blink_oneshot(trig, &usb_blink_delay, &usb_blink_delay, 0);
+ led_trigger_blink_oneshot(trig, BLINK_DELAY, BLINK_DELAY, 0);
}
EXPORT_SYMBOL_GPL(usb_led_activity);
-static int __init ledtrig_usb_init(void)
+void __init ledtrig_usb_init(void)
{
led_trigger_register_simple("usb-gadget", &ledtrig_usb_gadget);
led_trigger_register_simple("usb-host", &ledtrig_usb_host);
- return 0;
}
-static void __exit ledtrig_usb_exit(void)
+void __exit ledtrig_usb_exit(void)
{
led_trigger_unregister_simple(ledtrig_usb_gadget);
led_trigger_unregister_simple(ledtrig_usb_host);
}
-
-module_init(ledtrig_usb_init);
-module_exit(ledtrig_usb_exit);
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 9a2ab6751a23..4a2ee447b213 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
-/**
+/*
* ulpi.c - USB ULPI PHY bus
*
* Copyright (C) 2015 Intel Corporation
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/acpi.h>
+#include <linux/debugfs.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/clk/clk-conf.h>
@@ -33,14 +34,17 @@ EXPORT_SYMBOL_GPL(ulpi_write);
/* -------------------------------------------------------------------------- */
-static int ulpi_match(struct device *dev, struct device_driver *driver)
+static int ulpi_match(struct device *dev, const struct device_driver *driver)
{
struct ulpi_driver *drv = to_ulpi_driver(driver);
struct ulpi *ulpi = to_ulpi_dev(dev);
const struct ulpi_device_id *id;
- /* Some ULPI devices don't have a vendor id so rely on OF match */
- if (ulpi->id.vendor == 0)
+ /*
+ * Some ULPI devices don't have a vendor id
+ * or provide an id_table so rely on OF match.
+ */
+ if (ulpi->id.vendor == 0 || !drv->id_table)
return of_driver_match_device(dev, driver);
for (id = drv->id_table; id->vendor; id++)
@@ -51,9 +55,9 @@ static int ulpi_match(struct device *dev, struct device_driver *driver)
return 0;
}
-static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int ulpi_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct ulpi *ulpi = to_ulpi_dev(dev);
+ const struct ulpi *ulpi = to_ulpi_dev(dev);
int ret;
ret = of_device_uevent_modalias(dev, env);
@@ -78,17 +82,15 @@ static int ulpi_probe(struct device *dev)
return drv->probe(to_ulpi_dev(dev));
}
-static int ulpi_remove(struct device *dev)
+static void ulpi_remove(struct device *dev)
{
struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
if (drv->remove)
drv->remove(to_ulpi_dev(dev));
-
- return 0;
}
-static struct bus_type ulpi_bus = {
+static const struct bus_type ulpi_bus = {
.name = "ulpi",
.match = ulpi_match,
.uevent = ulpi_uevent,
@@ -118,7 +120,7 @@ static struct attribute *ulpi_dev_attrs[] = {
NULL
};
-static struct attribute_group ulpi_dev_attr_group = {
+static const struct attribute_group ulpi_dev_attr_group = {
.attrs = ulpi_dev_attrs,
};
@@ -129,6 +131,7 @@ static const struct attribute_group *ulpi_dev_attr_groups[] = {
static void ulpi_dev_release(struct device *dev)
{
+ of_node_put(dev->of_node);
kfree(to_ulpi_dev(dev));
}
@@ -141,8 +144,9 @@ static const struct device_type ulpi_dev_type = {
/* -------------------------------------------------------------------------- */
/**
- * ulpi_register_driver - register a driver with the ULPI bus
+ * __ulpi_register_driver - register a driver with the ULPI bus
* @drv: driver being registered
+ * @module: ends up being THIS_MODULE
*
* Registers a driver with the ULPI bus.
*/
@@ -225,13 +229,54 @@ static int ulpi_read_id(struct ulpi *ulpi)
request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
return 0;
err:
- of_device_request_module(&ulpi->dev);
+ of_request_module(ulpi->dev.of_node);
+ return 0;
+}
+
+static int ulpi_regs_show(struct seq_file *seq, void *data)
+{
+ struct ulpi *ulpi = seq->private;
+
+#define ulpi_print(name, reg) do { \
+ int ret = ulpi_read(ulpi, reg); \
+ if (ret < 0) \
+ return ret; \
+ seq_printf(seq, name " %.02x\n", ret); \
+} while (0)
+
+ ulpi_print("Vendor ID Low ", ULPI_VENDOR_ID_LOW);
+ ulpi_print("Vendor ID High ", ULPI_VENDOR_ID_HIGH);
+ ulpi_print("Product ID Low ", ULPI_PRODUCT_ID_LOW);
+ ulpi_print("Product ID High ", ULPI_PRODUCT_ID_HIGH);
+ ulpi_print("Function Control ", ULPI_FUNC_CTRL);
+ ulpi_print("Interface Control ", ULPI_IFC_CTRL);
+ ulpi_print("OTG Control ", ULPI_OTG_CTRL);
+ ulpi_print("USB Interrupt Enable Rising ", ULPI_USB_INT_EN_RISE);
+ ulpi_print("USB Interrupt Enable Falling", ULPI_USB_INT_EN_FALL);
+ ulpi_print("USB Interrupt Status ", ULPI_USB_INT_STS);
+ ulpi_print("USB Interrupt Latch ", ULPI_USB_INT_LATCH);
+ ulpi_print("Debug ", ULPI_DEBUG);
+ ulpi_print("Scratch Register ", ULPI_SCRATCH);
+ ulpi_print("Carkit Control ", ULPI_CARKIT_CTRL);
+ ulpi_print("Carkit Interrupt Delay ", ULPI_CARKIT_INT_DELAY);
+ ulpi_print("Carkit Interrupt Enable ", ULPI_CARKIT_INT_EN);
+ ulpi_print("Carkit Interrupt Status ", ULPI_CARKIT_INT_STS);
+ ulpi_print("Carkit Interrupt Latch ", ULPI_CARKIT_INT_LATCH);
+ ulpi_print("Carkit Pulse Control ", ULPI_CARKIT_PLS_CTRL);
+ ulpi_print("Transmit Positive Width ", ULPI_TX_POS_WIDTH);
+ ulpi_print("Transmit Negative Width ", ULPI_TX_NEG_WIDTH);
+ ulpi_print("Receive Polarity Recovery ", ULPI_POLARITY_RECOVERY);
+
return 0;
}
+DEFINE_SHOW_ATTRIBUTE(ulpi_regs);
+
+static struct dentry *ulpi_root;
static int ulpi_register(struct device *dev, struct ulpi *ulpi)
{
int ret;
+ struct dentry *root;
ulpi->dev.parent = dev; /* needed early for ops */
ulpi->dev.bus = &ulpi_bus;
@@ -245,12 +290,19 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi)
return ret;
ret = ulpi_read_id(ulpi);
- if (ret)
+ if (ret) {
+ of_node_put(ulpi->dev.of_node);
return ret;
+ }
ret = device_register(&ulpi->dev);
- if (ret)
+ if (ret) {
+ put_device(&ulpi->dev);
return ret;
+ }
+
+ root = debugfs_create_dir(dev_name(&ulpi->dev), ulpi_root);
+ debugfs_create_file("regs", 0444, root, ulpi, &ulpi_regs_fops);
dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
ulpi->id.vendor, ulpi->id.product);
@@ -290,14 +342,14 @@ EXPORT_SYMBOL_GPL(ulpi_register_interface);
/**
* ulpi_unregister_interface - unregister ULPI interface
- * @intrf: struct ulpi_interface
+ * @ulpi: struct ulpi_interface
*
* Unregisters a ULPI device and it's interface that was created with
* ulpi_create_interface().
*/
void ulpi_unregister_interface(struct ulpi *ulpi)
{
- of_node_put(ulpi->dev.of_node);
+ debugfs_lookup_and_remove(dev_name(&ulpi->dev), ulpi_root);
device_unregister(&ulpi->dev);
}
EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
@@ -306,13 +358,20 @@ EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
static int __init ulpi_init(void)
{
- return bus_register(&ulpi_bus);
+ int ret;
+
+ ulpi_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ ret = bus_register(&ulpi_bus);
+ if (ret)
+ debugfs_remove(ulpi_root);
+ return ret;
}
subsys_initcall(ulpi_init);
static void __exit ulpi_exit(void)
{
bus_unregister(&ulpi_bus);
+ debugfs_remove(ulpi_root);
}
module_exit(ulpi_exit);
diff --git a/drivers/usb/common/usb-conn-gpio.c b/drivers/usb/common/usb-conn-gpio.c
new file mode 100644
index 000000000000..421c3af38e06
--- /dev/null
+++ b/drivers/usb/common/usb-conn-gpio.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB GPIO Based Connection Detection Driver
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ *
+ * Some code borrowed from drivers/extcon/extcon-usb-gpio.c
+ */
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regulator/consumer.h>
+#include <linux/string_choices.h>
+#include <linux/usb/role.h>
+#include <linux/idr.h>
+
+static DEFINE_IDA(usb_conn_ida);
+
+#define USB_GPIO_DEB_MS 20 /* ms */
+#define USB_GPIO_DEB_US ((USB_GPIO_DEB_MS) * 1000) /* us */
+
+#define USB_CONN_IRQF \
+ (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT)
+
+struct usb_conn_info {
+ struct device *dev;
+ int conn_id; /* store the IDA-allocated ID */
+ struct usb_role_switch *role_sw;
+ enum usb_role last_role;
+ struct regulator *vbus;
+ struct delayed_work dw_det;
+ unsigned long debounce_jiffies;
+
+ struct gpio_desc *id_gpiod;
+ struct gpio_desc *vbus_gpiod;
+ int id_irq;
+ int vbus_irq;
+
+ struct power_supply_desc desc;
+ struct power_supply *charger;
+ bool initial_detection;
+};
+
+/*
+ * "DEVICE" = VBUS and "HOST" = !ID, so we have:
+ * Both "DEVICE" and "HOST" can't be set as active at the same time
+ * so if "HOST" is active (i.e. ID is 0) we keep "DEVICE" inactive
+ * even if VBUS is on.
+ *
+ * Role | ID | VBUS
+ * ------------------------------------
+ * [1] DEVICE | H | H
+ * [2] NONE | H | L
+ * [3] HOST | L | H
+ * [4] HOST | L | L
+ *
+ * In case we have only one of these signals:
+ * - VBUS only - we want to distinguish between [1] and [2], so ID is always 1
+ * - ID only - we want to distinguish between [1] and [4], so VBUS = ID
+ */
+static void usb_conn_detect_cable(struct work_struct *work)
+{
+ struct usb_conn_info *info;
+ enum usb_role role;
+ int id, vbus, ret;
+
+ info = container_of(to_delayed_work(work),
+ struct usb_conn_info, dw_det);
+
+ /* check ID and VBUS */
+ id = info->id_gpiod ?
+ gpiod_get_value_cansleep(info->id_gpiod) : 1;
+ vbus = info->vbus_gpiod ?
+ gpiod_get_value_cansleep(info->vbus_gpiod) : id;
+
+ if (!id)
+ role = USB_ROLE_HOST;
+ else if (vbus)
+ role = USB_ROLE_DEVICE;
+ else
+ role = USB_ROLE_NONE;
+
+ dev_dbg(info->dev, "role %s -> %s, gpios: id %d, vbus %d\n",
+ usb_role_string(info->last_role), usb_role_string(role), id, vbus);
+
+ if (!info->initial_detection && info->last_role == role) {
+ dev_warn(info->dev, "repeated role: %s\n", usb_role_string(role));
+ return;
+ }
+
+ info->initial_detection = false;
+
+ if (info->last_role == USB_ROLE_HOST && info->vbus)
+ regulator_disable(info->vbus);
+
+ ret = usb_role_switch_set_role(info->role_sw, role);
+ if (ret)
+ dev_err(info->dev, "failed to set role: %d\n", ret);
+
+ if (role == USB_ROLE_HOST && info->vbus) {
+ ret = regulator_enable(info->vbus);
+ if (ret)
+ dev_err(info->dev, "enable vbus regulator failed\n");
+ }
+
+ info->last_role = role;
+
+ if (info->vbus)
+ dev_dbg(info->dev, "vbus regulator is %s\n",
+ str_enabled_disabled(regulator_is_enabled(info->vbus)));
+
+ power_supply_changed(info->charger);
+}
+
+static void usb_conn_queue_dwork(struct usb_conn_info *info,
+ unsigned long delay)
+{
+ queue_delayed_work(system_power_efficient_wq, &info->dw_det, delay);
+}
+
+static irqreturn_t usb_conn_isr(int irq, void *dev_id)
+{
+ struct usb_conn_info *info = dev_id;
+
+ usb_conn_queue_dwork(info, info->debounce_jiffies);
+
+ return IRQ_HANDLED;
+}
+
+static enum power_supply_property usb_charger_properties[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static int usb_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct usb_conn_info *info = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = info->last_role == USB_ROLE_DEVICE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int usb_conn_psy_register(struct usb_conn_info *info)
+{
+ struct device *dev = info->dev;
+ struct power_supply_desc *desc = &info->desc;
+ struct power_supply_config cfg = {
+ .fwnode = dev_fwnode(dev),
+ };
+
+ info->conn_id = ida_alloc(&usb_conn_ida, GFP_KERNEL);
+ if (info->conn_id < 0)
+ return info->conn_id;
+
+ desc->name = devm_kasprintf(dev, GFP_KERNEL, "usb-charger-%d",
+ info->conn_id);
+ if (!desc->name) {
+ ida_free(&usb_conn_ida, info->conn_id);
+ return -ENOMEM;
+ }
+
+ desc->properties = usb_charger_properties;
+ desc->num_properties = ARRAY_SIZE(usb_charger_properties);
+ desc->get_property = usb_charger_get_property;
+ desc->type = POWER_SUPPLY_TYPE_USB;
+ cfg.drv_data = info;
+
+ info->charger = devm_power_supply_register(dev, desc, &cfg);
+ if (IS_ERR(info->charger)) {
+ dev_err(dev, "Unable to register charger %d\n", info->conn_id);
+ ida_free(&usb_conn_ida, info->conn_id);
+ }
+
+ return PTR_ERR_OR_ZERO(info->charger);
+}
+
+static int usb_conn_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct usb_conn_info *info;
+ int ret = 0;
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = dev;
+ info->id_gpiod = devm_gpiod_get_optional(dev, "id", GPIOD_IN);
+ if (IS_ERR(info->id_gpiod))
+ return PTR_ERR(info->id_gpiod);
+
+ info->vbus_gpiod = devm_gpiod_get_optional(dev, "vbus", GPIOD_IN);
+ if (IS_ERR(info->vbus_gpiod))
+ return PTR_ERR(info->vbus_gpiod);
+
+ if (!info->id_gpiod && !info->vbus_gpiod) {
+ dev_err(dev, "failed to get gpios\n");
+ return -ENODEV;
+ }
+
+ if (info->id_gpiod)
+ ret = gpiod_set_debounce(info->id_gpiod, USB_GPIO_DEB_US);
+ if (!ret && info->vbus_gpiod)
+ ret = gpiod_set_debounce(info->vbus_gpiod, USB_GPIO_DEB_US);
+ if (ret < 0)
+ info->debounce_jiffies = msecs_to_jiffies(USB_GPIO_DEB_MS);
+
+ INIT_DELAYED_WORK(&info->dw_det, usb_conn_detect_cable);
+
+ info->vbus = devm_regulator_get_optional(dev, "vbus");
+ if (PTR_ERR(info->vbus) == -ENODEV)
+ info->vbus = NULL;
+
+ if (IS_ERR(info->vbus))
+ return dev_err_probe(dev, PTR_ERR(info->vbus), "failed to get vbus\n");
+
+ info->role_sw = usb_role_switch_get(dev);
+ if (IS_ERR(info->role_sw))
+ return dev_err_probe(dev, PTR_ERR(info->role_sw),
+ "failed to get role switch\n");
+
+ ret = usb_conn_psy_register(info);
+ if (ret)
+ goto put_role_sw;
+
+ if (info->id_gpiod) {
+ info->id_irq = gpiod_to_irq(info->id_gpiod);
+ if (info->id_irq < 0) {
+ dev_err(dev, "failed to get ID IRQ\n");
+ ret = info->id_irq;
+ goto put_role_sw;
+ }
+
+ ret = devm_request_threaded_irq(dev, info->id_irq, NULL,
+ usb_conn_isr, USB_CONN_IRQF,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request ID IRQ\n");
+ goto put_role_sw;
+ }
+ }
+
+ if (info->vbus_gpiod) {
+ info->vbus_irq = gpiod_to_irq(info->vbus_gpiod);
+ if (info->vbus_irq < 0) {
+ dev_err(dev, "failed to get VBUS IRQ\n");
+ ret = info->vbus_irq;
+ goto put_role_sw;
+ }
+
+ ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL,
+ usb_conn_isr, USB_CONN_IRQF,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request VBUS IRQ\n");
+ goto put_role_sw;
+ }
+ }
+
+ platform_set_drvdata(pdev, info);
+ device_set_wakeup_capable(&pdev->dev, true);
+
+ /* Perform initial detection */
+ info->initial_detection = true;
+ usb_conn_queue_dwork(info, 0);
+
+ return 0;
+
+put_role_sw:
+ usb_role_switch_put(info->role_sw);
+ return ret;
+}
+
+static void usb_conn_remove(struct platform_device *pdev)
+{
+ struct usb_conn_info *info = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&info->dw_det);
+
+ if (info->charger)
+ ida_free(&usb_conn_ida, info->conn_id);
+
+ if (info->last_role == USB_ROLE_HOST && info->vbus)
+ regulator_disable(info->vbus);
+
+ usb_role_switch_put(info->role_sw);
+}
+
+static int __maybe_unused usb_conn_suspend(struct device *dev)
+{
+ struct usb_conn_info *info = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev)) {
+ if (info->id_gpiod)
+ enable_irq_wake(info->id_irq);
+ if (info->vbus_gpiod)
+ enable_irq_wake(info->vbus_irq);
+ return 0;
+ }
+
+ if (info->id_gpiod)
+ disable_irq(info->id_irq);
+ if (info->vbus_gpiod)
+ disable_irq(info->vbus_irq);
+
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused usb_conn_resume(struct device *dev)
+{
+ struct usb_conn_info *info = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev)) {
+ if (info->id_gpiod)
+ disable_irq_wake(info->id_irq);
+ if (info->vbus_gpiod)
+ disable_irq_wake(info->vbus_irq);
+ return 0;
+ }
+
+ pinctrl_pm_select_default_state(dev);
+
+ if (info->id_gpiod)
+ enable_irq(info->id_irq);
+ if (info->vbus_gpiod)
+ enable_irq(info->vbus_irq);
+
+ usb_conn_queue_dwork(info, 0);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(usb_conn_pm_ops,
+ usb_conn_suspend, usb_conn_resume);
+
+static const struct of_device_id usb_conn_dt_match[] = {
+ { .compatible = "gpio-usb-b-connector", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, usb_conn_dt_match);
+
+static struct platform_driver usb_conn_driver = {
+ .probe = usb_conn_probe,
+ .remove = usb_conn_remove,
+ .driver = {
+ .name = "usb-conn-gpio",
+ .pm = &usb_conn_pm_ops,
+ .of_match_table = usb_conn_dt_match,
+ },
+};
+
+module_platform_driver(usb_conn_driver);
+
+MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
+MODULE_DESCRIPTION("USB GPIO based connection detection driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
index 3740cf95560e..e11803225775 100644
--- a/drivers/usb/common/usb-otg-fsm.c
+++ b/drivers/usb/common/usb-otg-fsm.c
@@ -193,7 +193,11 @@ static void otg_start_hnp_polling(struct otg_fsm *fsm)
if (!fsm->host_req_flag)
return;
- INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work);
+ if (!fsm->hnp_work_inited) {
+ INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work);
+ fsm->hnp_work_inited = true;
+ }
+
schedule_delayed_work(&fsm->hnp_polling_work,
msecs_to_jiffies(T_HOST_REQ_POLL));
}
@@ -445,4 +449,5 @@ int otg_statemachine(struct otg_fsm *fsm)
return fsm->state_changed;
}
EXPORT_SYMBOL_GPL(otg_statemachine);
+MODULE_DESCRIPTION("OTG Finite State Machine");
MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-24 21:26:30 +0000