1 // SPDX-License-Identifier: GPL-2.0
7  * compiled-in as well.  Otherwise, if either of the two stacks is
17 #include <linux/usb/otg.h>
30  * usb_ep_type_string() - Returns human readable-name of the endpoint type.
31  * @ep_type: The endpoint type to return human-readable name for.  If it's not
71 	[USB_SPEED_LOW] = "low-speed",
72 	[USB_SPEED_FULL] = "full-speed",
73 	[USB_SPEED_HIGH] = "high-speed",
75 	[USB_SPEED_SUPER] = "super-speed",
76 	[USB_SPEED_SUPER_PLUS] = "super-speed-plus",
81 	[USB_SSP_GEN_2x1] = "super-speed-plus-gen2x1",
82 	[USB_SSP_GEN_1x2] = "super-speed-plus-gen1x2",
83 	[USB_SSP_GEN_2x2] = "super-speed-plus-gen2x2",
87  * usb_speed_string() - Returns human readable-name of the speed.
88  * @speed: The speed to return human-readable name for.  If it's not
101  * usb_get_maximum_speed - Get maximum requested speed for a given USB
105  * The function gets the maximum speed string from property "maximum-speed",
110 	const char *p = "maximum-speed";  in usb_get_maximum_speed()
126  * usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count
130  * If the string from "maximum-speed" property is super-speed-plus-genXxY where
139 	ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);  in usb_get_maximum_ssp_rate()
149  * usb_state_string - Returns human readable name for the state.
150  * @state: The state to return a human-readable name for. If it's not
179 	[USB_DR_MODE_OTG]		= "otg",
204  * usb_get_role_switch_default_mode - Get default mode for given device
207  * The function gets string from property 'role-switch-default-mode',
215 	ret = device_property_read_string(dev, "role-switch-default-mode", &str);  in usb_get_role_switch_default_mode()
224  * usb_decode_interval - Decode bInterval into the time expressed in 1us unit
240 			interval = epd->bInterval;  in usb_decode_interval()
243 		interval = 1 << (epd->bInterval - 1);  in usb_decode_interval()
248 			interval = epd->bInterval;  in usb_decode_interval()
252 			interval = 1 << (epd->bInterval - 1);  in usb_decode_interval()
254 			interval = epd->bInterval;  in usb_decode_interval()
266  * of_usb_get_dr_mode_by_phy - Get dual role mode for the controller device
269  * @arg0: phandle args[0] for phy's with #phy-cells >= 1, or -1 for
270  *        phys which do not have phy-cells
289 			if (arg0 == -1) {  in of_usb_get_dr_mode_by_phy()
295 							"phys", "#phy-cells",  in of_usb_get_dr_mode_by_phy()
321  * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported
322  * for given targeted hosts (non-PC hosts)
329 	return of_property_read_bool(np, "tpl-support");  in of_usb_host_tpl_support()
334  * of_usb_update_otg_caps - to update usb otg capabilities according to
339  * The function updates the otg capabilities
347 		return -EINVAL;  in of_usb_update_otg_caps()
349 	if (!of_property_read_u32(np, "otg-rev", &otg_rev)) {  in of_usb_update_otg_caps()
356 			if (otg_caps->otg_rev)  in of_usb_update_otg_caps()
357 				otg_caps->otg_rev = min_t(u16, otg_rev,  in of_usb_update_otg_caps()
358 							otg_caps->otg_rev);  in of_usb_update_otg_caps()
360 				otg_caps->otg_rev = otg_rev;  in of_usb_update_otg_caps()
363 			pr_err("%pOF: unsupported otg-rev: 0x%x\n",  in of_usb_update_otg_caps()
365 			return -EINVAL;  in of_usb_update_otg_caps()
369 		 * otg-rev is mandatory for otg properties, if not passed  in of_usb_update_otg_caps()
370 		 * we set it to be 0 and assume it's a legacy otg device.  in of_usb_update_otg_caps()
371 		 * Non-dt platform can set it afterwards.  in of_usb_update_otg_caps()
373 		otg_caps->otg_rev = 0;  in of_usb_update_otg_caps()
376 	if (of_property_read_bool(np, "hnp-disable"))  in of_usb_update_otg_caps()
377 		otg_caps->hnp_support = false;  in of_usb_update_otg_caps()
378 	if (of_property_read_bool(np, "srp-disable"))  in of_usb_update_otg_caps()
379 		otg_caps->srp_support = false;  in of_usb_update_otg_caps()
380 	if (of_property_read_bool(np, "adp-disable") ||  in of_usb_update_otg_caps()
381 				(otg_caps->otg_rev < 0x0200))  in of_usb_update_otg_caps()
382 		otg_caps->adp_support = false;  in of_usb_update_otg_caps()
389  * usb_of_get_companion_dev - Find the companion device
404 	node = of_parse_phandle(dev->of_node, "companion", 0);  in usb_of_get_companion_dev()
410 	return pdev ? &pdev->dev : NULL;  in usb_of_get_companion_dev()