Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 436 insertions, 0 deletions

diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
new file mode 100644
index 0000000000..b84efae26e
--- /dev/null
+++ b/drivers/usb/common/common.c
@@ -0,0 +1,436 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Provides code common for host and device side USB.
+ *
+ * If either host side (ie. CONFIG_USB=y) or device side USB stack
+ * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is
+ * compiled-in as well.  Otherwise, if either of the two stacks is
+ * compiled as module, this file is compiled as module as well.
+ */
+
+#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);
+
+const char *usb_otg_state_string(enum usb_otg_state state)
+{
+	static const char *const names[] = {
+		[OTG_STATE_A_IDLE] = "a_idle",
+		[OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise",
+		[OTG_STATE_A_WAIT_BCON] = "a_wait_bcon",
+		[OTG_STATE_A_HOST] = "a_host",
+		[OTG_STATE_A_SUSPEND] = "a_suspend",
+		[OTG_STATE_A_PERIPHERAL] = "a_peripheral",
+		[OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall",
+		[OTG_STATE_A_VBUS_ERR] = "a_vbus_err",
+		[OTG_STATE_B_IDLE] = "b_idle",
+		[OTG_STATE_B_SRP_INIT] = "b_srp_init",
+		[OTG_STATE_B_PERIPHERAL] = "b_peripheral",
+		[OTG_STATE_B_WAIT_ACON] = "b_wait_acon",
+		[OTG_STATE_B_HOST] = "b_host",
+	};
+
+	if (state < 0 || state >= ARRAY_SIZE(names))
+		return "UNDEFINED";
+
+	return names[state];
+}
+EXPORT_SYMBOL_GPL(usb_otg_state_string);
+
+static const char *const speed_names[] = {
+	[USB_SPEED_UNKNOWN] = "UNKNOWN",
+	[USB_SPEED_LOW] = "low-speed",
+	[USB_SPEED_FULL] = "full-speed",
+	[USB_SPEED_HIGH] = "high-speed",
+	[USB_SPEED_WIRELESS] = "wireless",
+	[USB_SPEED_SUPER] = "super-speed",
+	[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))
+		speed = USB_SPEED_UNKNOWN;
+	return speed_names[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 *maximum_speed;
+	int ret;
+
+	ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);
+	if (ret < 0)
+		return USB_SPEED_UNKNOWN;
+
+	ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
+	if (ret > 0)
+		return USB_SPEED_SUPER_PLUS;
+
+	ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
+	return (ret < 0) ? USB_SPEED_UNKNOWN : ret;
+}
+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_SSP_GEN_UNKNOWN;
+
+	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_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[] = {
+		[USB_STATE_NOTATTACHED] = "not attached",
+		[USB_STATE_ATTACHED] = "attached",
+		[USB_STATE_POWERED] = "powered",
+		[USB_STATE_RECONNECTING] = "reconnecting",
+		[USB_STATE_UNAUTHENTICATED] = "unauthenticated",
+		[USB_STATE_DEFAULT] = "default",
+		[USB_STATE_ADDRESS] = "addressed",
+		[USB_STATE_CONFIGURED] = "configured",
+		[USB_STATE_SUSPENDED] = "suspended",
+	};
+
+	if (state < 0 || state >= ARRAY_SIZE(names))
+		return "UNKNOWN";
+
+	return names[state];
+}
+EXPORT_SYMBOL_GPL(usb_state_string);
+
+static const char *const usb_dr_modes[] = {
+	[USB_DR_MODE_UNKNOWN]		= "",
+	[USB_DR_MODE_HOST]		= "host",
+	[USB_DR_MODE_PERIPHERAL]	= "peripheral",
+	[USB_DR_MODE_OTG]		= "otg",
+};
+
+static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
+{
+	int ret;
+
+	ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str);
+	return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret;
+}
+
+enum usb_dr_mode usb_get_dr_mode(struct device *dev)
+{
+	const char *dr_mode;
+	int err;
+
+	err = device_property_read_string(dev, "dr_mode", &dr_mode);
+	if (err < 0)
+		return USB_DR_MODE_UNKNOWN;
+
+	return usb_get_dr_mode_from_string(dr_mode);
+}
+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
+ * which is associated with the given phy device_node
+ * @np:	Pointer to the given phy device_node
+ * @arg0: phandle args[0] for phy's with #phy-cells >= 1, or -1 for
+ *        phys which do not have phy-cells
+ *
+ * In dts a usb controller associates with phy devices.  The function gets
+ * the string from property 'dr_mode' of the controller associated with the
+ * given phy device node, and returns the correspondig enum usb_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 of_phandle_args args;
+	const char *dr_mode;
+	int index;
+	int err;
+
+	do {
+		controller = of_find_node_with_property(controller, "phys");
+		if (!of_device_is_available(controller))
+			continue;
+		index = 0;
+		do {
+			if (arg0 == -1) {
+				args.np = of_parse_phandle(controller, "phys",
+							index);
+				args.args_count = 0;
+			} else {
+				err = of_parse_phandle_with_args(controller,
+							"phys", "#phy-cells",
+							index, &args);
+				if (err)
+					break;
+			}
+
+			of_node_put(args.np);
+			if (args.np == np && (args.args_count == 0 ||
+					      args.args[0] == arg0))
+				goto finish;
+			index++;
+		} while (args.np);
+	} while (controller);
+
+finish:
+	err = of_property_read_string(controller, "dr_mode", &dr_mode);
+	of_node_put(controller);
+
+	if (err < 0)
+		return USB_DR_MODE_UNKNOWN;
+
+	return usb_get_dr_mode_from_string(dr_mode);
+}
+EXPORT_SYMBOL_GPL(of_usb_get_dr_mode_by_phy);
+
+/**
+ * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported
+ * for given targeted hosts (non-PC hosts)
+ * @np: Pointer to the given device_node
+ *
+ * The function gets if the targeted hosts support TPL or not
+ */
+bool of_usb_host_tpl_support(struct device_node *np)
+{
+	return of_property_read_bool(np, "tpl-support");
+}
+EXPORT_SYMBOL_GPL(of_usb_host_tpl_support);
+
+/**
+ * of_usb_update_otg_caps - to update usb otg capabilities according to
+ * the passed properties in DT.
+ * @np: Pointer to the given device_node
+ * @otg_caps: Pointer to the target usb_otg_caps to be set
+ *
+ * The function updates the otg capabilities
+ */
+int of_usb_update_otg_caps(struct device_node *np,
+			struct usb_otg_caps *otg_caps)
+{
+	u32 otg_rev;
+
+	if (!otg_caps)
+		return -EINVAL;
+
+	if (!of_property_read_u32(np, "otg-rev", &otg_rev)) {
+		switch (otg_rev) {
+		case 0x0100:
+		case 0x0120:
+		case 0x0130:
+		case 0x0200:
+			/* Choose the lesser one if it's already been set */
+			if (otg_caps->otg_rev)
+				otg_caps->otg_rev = min_t(u16, otg_rev,
+							otg_caps->otg_rev);
+			else
+				otg_caps->otg_rev = otg_rev;
+			break;
+		default:
+			pr_err("%pOF: unsupported otg-rev: 0x%x\n",
+						np, otg_rev);
+			return -EINVAL;
+		}
+	} else {
+		/*
+		 * otg-rev is mandatory for otg properties, if not passed
+		 * we set it to be 0 and assume it's a legacy otg device.
+		 * Non-dt platform can set it afterwards.
+		 */
+		otg_caps->otg_rev = 0;
+	}
+
+	if (of_property_read_bool(np, "hnp-disable"))
+		otg_caps->hnp_support = false;
+	if (of_property_read_bool(np, "srp-disable"))
+		otg_caps->srp_support = false;
+	if (of_property_read_bool(np, "adp-disable") ||
+				(otg_caps->otg_rev < 0x0200))
+		otg_caps->adp_support = false;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
+
+/**
+ * usb_of_get_companion_dev - Find the companion device
+ * @dev: the device pointer to find a companion
+ *
+ * Find the companion device from platform bus.
+ *
+ * Takes a reference to the returned struct device which needs to be dropped
+ * after use.
+ *
+ * Return: On success, a pointer to the companion device, %NULL on failure.
+ */
+struct device *usb_of_get_companion_dev(struct device *dev)
+{
+	struct device_node *node;
+	struct platform_device *pdev = NULL;
+
+	node = of_parse_phandle(dev->of_node, "companion", 0);
+	if (node)
+		pdev = of_find_device_by_node(node);
+
+	of_node_put(node);
+
+	return pdev ? &pdev->dev : NULL;
+}
+EXPORT_SYMBOL_GPL(usb_of_get_companion_dev);
+#endif
+
+struct dentry *usb_debug_root;
+EXPORT_SYMBOL_GPL(usb_debug_root);
+
+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_LICENSE("GPL");