1 /* SPDX-License-Identifier: GPL-2.0 */
8 	return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE &&  in uas_is_interface()
9 		intf->desc.bInterfaceSubClass == USB_SC_SCSI &&  in uas_is_interface()
10 		intf->desc.bInterfaceProtocol == USB_PR_UAS);  in uas_is_interface()
18 	for (i = 0; i < intf->num_altsetting; i++) {  in uas_find_uas_alt_setting()
19 		struct usb_host_interface *alt = &intf->altsetting[i];  in uas_find_uas_alt_setting()  local
21 		if (uas_is_interface(alt))  in uas_find_uas_alt_setting()
22 			return alt;  in uas_find_uas_alt_setting()
28 static int uas_find_endpoints(struct usb_host_interface *alt,  in uas_find_endpoints()  argument
31 	struct usb_host_endpoint *endpoint = alt->endpoint;  in uas_find_endpoints()
32 	unsigned i, n_endpoints = alt->desc.bNumEndpoints;  in uas_find_endpoints()
41 					eps[pipe_id - 1] = &endpoint[i];  in uas_find_endpoints()
44 			len -= extra[0];  in uas_find_endpoints()
50 		return -ENODEV;  in uas_find_endpoints()
61 	struct usb_hcd *hcd = bus_to_hcd(udev->bus);  in uas_use_uas_driver()
62 	unsigned long flags = id->driver_info;  in uas_use_uas_driver()
63 	struct usb_host_interface *alt;  in uas_use_uas_driver()  local
66 	alt = uas_find_uas_alt_setting(intf);  in uas_use_uas_driver()
67 	if (!alt)  in uas_use_uas_driver()
70 	r = uas_find_endpoints(alt, eps);  in uas_use_uas_driver()
77 	 * ASM1051 - no uas support version  in uas_use_uas_driver()
78 	 * ASM1051 - with broken (*) uas support  in uas_use_uas_driver()
79 	 * ASM1053 - with working uas support, but problems with large xfers  in uas_use_uas_driver()
80 	 * ASM1153 - with working uas support  in uas_use_uas_driver()
82 	 * Devices with these chips re-use a number of device-ids over the  in uas_use_uas_driver()
83 	 * entire line, so the device-id is useless to determine if we're  in uas_use_uas_driver()
90 	 * connected over USB-3 we can look at the number of streams supported,  in uas_use_uas_driver()
92 	 * 16 streams, newer ASM1053-s also support 32 streams, but have a  in uas_use_uas_driver()
93 	 * different prod-id.  in uas_use_uas_driver()
98 	if (le16_to_cpu(udev->descriptor.idVendor) == 0x174c &&  in uas_use_uas_driver()
99 			(le16_to_cpu(udev->descriptor.idProduct) == 0x5106 ||  in uas_use_uas_driver()
100 			 le16_to_cpu(udev->descriptor.idProduct) == 0x55aa)) {  in uas_use_uas_driver()
101 		if (udev->actconfig->desc.bMaxPower == 0) {  in uas_use_uas_driver()
103 		} else if (udev->speed < USB_SPEED_SUPER) {  in uas_use_uas_driver()
106 		} else if (usb_ss_max_streams(&eps[1]->ss_ep_comp) == 32) {  in uas_use_uas_driver()
115 	/* All Seagate disk enclosures have broken ATA pass-through support */  in uas_use_uas_driver()
116 	if (le16_to_cpu(udev->descriptor.idVendor) == 0x0bc2)  in uas_use_uas_driver()
122 		dev_warn(&udev->dev,  in uas_use_uas_driver()
123 			"UAS is ignored for this device, using usb-storage instead\n");  in uas_use_uas_driver()
127 	if (udev->bus->sg_tablesize == 0) {  in uas_use_uas_driver()
128 		dev_warn(&udev->dev,  in uas_use_uas_driver()
129 			"The driver for the USB controller %s does not support scatter-gather which is\n",  in uas_use_uas_driver()
130 			hcd->driver->description);  in uas_use_uas_driver()
131 		dev_warn(&udev->dev,  in uas_use_uas_driver()
136 	if (udev->speed >= USB_SPEED_SUPER && !hcd->can_do_streams) {  in uas_use_uas_driver()
137 		dev_warn(&udev->dev,  in uas_use_uas_driver()
139 			hcd_to_bus(hcd)->bus_name);  in uas_use_uas_driver()
140 		dev_warn(&udev->dev,  in uas_use_uas_driver()