forked from ~ljy/RK356X_SDK_RELEASE
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hc
2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/usb/common/common.c
....@@ -15,6 +15,30 @@
1515 #include <linux/usb/of.h>
1616 #include <linux/usb/otg.h>
1717 #include <linux/of_platform.h>
18
+#include <linux/debugfs.h>
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+#include "common.h"
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+
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+static const char *const ep_type_names[] = {
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+	[USB_ENDPOINT_XFER_CONTROL] = "ctrl",
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+	[USB_ENDPOINT_XFER_ISOC] = "isoc",
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+	[USB_ENDPOINT_XFER_BULK] = "bulk",
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+	[USB_ENDPOINT_XFER_INT] = "intr",
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+};
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+
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+/**
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+ * usb_ep_type_string() - Returns human readable-name of the endpoint type.
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+ * @ep_type: The endpoint type to return human-readable name for.  If it's not
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+ *   any of the types: USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT},
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+ *   usually got by usb_endpoint_type(), the string 'unknown' will be returned.
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+ */
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+const char *usb_ep_type_string(int ep_type)
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+{
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+	if (ep_type < 0 || ep_type >= ARRAY_SIZE(ep_type_names))
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+		return "unknown";
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+
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+	return ep_type_names[ep_type];
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+}
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+EXPORT_SYMBOL_GPL(usb_ep_type_string);
1842 
1943 const char *usb_otg_state_string(enum usb_otg_state state)
2044 {
....@@ -51,6 +75,19 @@
5175 	[USB_SPEED_SUPER_PLUS] = "super-speed-plus",
5276 };
5377 
78
+static const char *const ssp_rate[] = {
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+	[USB_SSP_GEN_UNKNOWN] = "UNKNOWN",
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+	[USB_SSP_GEN_2x1] = "super-speed-plus-gen2x1",
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+	[USB_SSP_GEN_1x2] = "super-speed-plus-gen1x2",
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+	[USB_SSP_GEN_2x2] = "super-speed-plus-gen2x2",
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+};
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+
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+/**
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+ * usb_speed_string() - Returns human readable-name of the speed.
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+ * @speed: The speed to return human-readable name for.  If it's not
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+ *   any of the speeds defined in usb_device_speed enum, string for
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+ *   USB_SPEED_UNKNOWN will be returned.
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+ */
5491 const char *usb_speed_string(enum usb_device_speed speed)
5592 {
5693 	if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
....@@ -59,6 +96,14 @@
5996 }
6097 EXPORT_SYMBOL_GPL(usb_speed_string);
6198 
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+/**
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+ * usb_get_maximum_speed - Get maximum requested speed for a given USB
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+ * controller.
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+ * @dev: Pointer to the given USB controller device
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+ *
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+ * The function gets the maximum speed string from property "maximum-speed",
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+ * and returns the corresponding enum usb_device_speed.
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+ */
62107 enum usb_device_speed usb_get_maximum_speed(struct device *dev)
63108 {
64109 	const char *maximum_speed;
....@@ -68,12 +113,44 @@
68113 	if (ret < 0)
69114 		return USB_SPEED_UNKNOWN;
70115 
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-	ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
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+	ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
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+	if (ret > 0)
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+		return USB_SPEED_SUPER_PLUS;
72119 
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+	ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
73121 	return (ret < 0) ? USB_SPEED_UNKNOWN : ret;
74122 }
75123 EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
76124 
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+/**
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+ * usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count
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+ *	of a SuperSpeed Plus capable device.
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+ * @dev: Pointer to the given USB controller device
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+ *
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+ * If the string from "maximum-speed" property is super-speed-plus-genXxY where
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+ * 'X' is the generation number and 'Y' is the number of lanes, then this
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+ * function returns the corresponding enum usb_ssp_rate.
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+ */
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+enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev)
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+{
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+	const char *maximum_speed;
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+	int ret;
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+
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+	ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);
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+	if (ret < 0)
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+		return USB_SSP_GEN_UNKNOWN;
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+
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+	ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
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+	return (ret < 0) ? USB_SSP_GEN_UNKNOWN : ret;
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+}
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+EXPORT_SYMBOL_GPL(usb_get_maximum_ssp_rate);
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+
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+/**
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+ * usb_state_string - Returns human readable name for the state.
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+ * @state: The state to return a human-readable name for. If it's not
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+ *	any of the states devices in usb_device_state_string enum,
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+ *	the string UNKNOWN will be returned.
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+ */
77154 const char *usb_state_string(enum usb_device_state state)
78155 {
79156 	static const char *const names[] = {
....@@ -100,7 +177,6 @@
100177 	[USB_DR_MODE_HOST]		= "host",
101178 	[USB_DR_MODE_PERIPHERAL]	= "peripheral",
102179 	[USB_DR_MODE_OTG]		= "otg",
103
-	[USB_DR_MODE_DRD]               = "drd",
104180 };
105181 
106182 static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
....@@ -123,6 +199,47 @@
123199 	return usb_get_dr_mode_from_string(dr_mode);
124200 }
125201 EXPORT_SYMBOL_GPL(usb_get_dr_mode);
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+
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+/**
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+ * usb_decode_interval - Decode bInterval into the time expressed in 1us unit
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+ * @epd: The descriptor of the endpoint
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+ * @speed: The speed that the endpoint works as
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+ *
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+ * Function returns the interval expressed in 1us unit for servicing
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+ * endpoint for data transfers.
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+ */
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+unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd,
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+				 enum usb_device_speed speed)
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+{
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+	unsigned int interval = 0;
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+
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+	switch (usb_endpoint_type(epd)) {
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+	case USB_ENDPOINT_XFER_CONTROL:
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+		/* uframes per NAK */
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+		if (speed == USB_SPEED_HIGH)
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+			interval = epd->bInterval;
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+		break;
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+	case USB_ENDPOINT_XFER_ISOC:
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+		interval = 1 << (epd->bInterval - 1);
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+		break;
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+	case USB_ENDPOINT_XFER_BULK:
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+		/* uframes per NAK */
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+		if (speed == USB_SPEED_HIGH && usb_endpoint_dir_out(epd))
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+			interval = epd->bInterval;
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+		break;
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+	case USB_ENDPOINT_XFER_INT:
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+		if (speed >= USB_SPEED_HIGH)
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+			interval = 1 << (epd->bInterval - 1);
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+		else
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+			interval = epd->bInterval;
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+		break;
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+	}
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+
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+	interval *= (speed >= USB_SPEED_HIGH) ? 125 : 1000;
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+
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+	return interval;
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+}
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+EXPORT_SYMBOL_GPL(usb_decode_interval);
126243 
127244 #ifdef CONFIG_OF
128245 /**
....@@ -276,4 +393,23 @@
276393 EXPORT_SYMBOL_GPL(usb_of_get_companion_dev);
277394 #endif
278395 
396
+struct dentry *usb_debug_root;
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+EXPORT_SYMBOL_GPL(usb_debug_root);
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+
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+static int __init usb_common_init(void)
400
+{
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+	usb_debug_root = debugfs_create_dir("usb", NULL);
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+	ledtrig_usb_init();
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+	return 0;
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+}
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+
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+static void __exit usb_common_exit(void)
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+{
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+	ledtrig_usb_exit();
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+	debugfs_remove_recursive(usb_debug_root);
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+}
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+
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+subsys_initcall(usb_common_init);
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+module_exit(usb_common_exit);
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+
279415 MODULE_LICENSE("GPL");