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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/kernel.h>
7#include <linux/errno.h>
8#include <linux/module.h>
9#include <linux/slab.h>
10#include <linux/usb.h>
11#include <linux/usb/ch11.h>
12
13#define TEST_SE0_NAK_PID 0x0101
14#define TEST_J_PID 0x0102
15#define TEST_K_PID 0x0103
16#define TEST_PACKET_PID 0x0104
17#define TEST_HS_HOST_PORT_SUSPEND_RESUME 0x0106
18#define TEST_SINGLE_STEP_GET_DEV_DESC 0x0107
19#define TEST_SINGLE_STEP_SET_FEATURE 0x0108
20
21extern const struct usb_device_id *usb_device_match_id(struct usb_device *udev,
22 const struct usb_device_id *id);
23
24/*
25 * A list of USB hubs which requires to disable the power
26 * to the port before starting the testing procedures.
27 */
28static const struct usb_device_id ehset_hub_list[] = {
29 { USB_DEVICE(0x0424, 0x4502) },
30 { USB_DEVICE(0x0424, 0x4913) },
31 { USB_DEVICE(0x0451, 0x8027) },
32 { }
33};
34
35static int ehset_prepare_port_for_testing(struct usb_device *hub_udev, u16 portnum)
36{
37 int ret = 0;
38
39 /*
40 * The USB2.0 spec chapter 11.24.2.13 says that the USB port which is
41 * going under test needs to be put in suspend before sending the
42 * test command. Most hubs don't enforce this precondition, but there
43 * are some hubs which needs to disable the power to the port before
44 * starting the test.
45 */
46 if (usb_device_match_id(hub_udev, ehset_hub_list)) {
47 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_CLEAR_FEATURE,
48 USB_RT_PORT, USB_PORT_FEAT_ENABLE,
49 portnum, NULL, 0, 1000, GFP_KERNEL);
50 /*
51 * Wait for the port to be disabled. It's an arbitrary value
52 * which worked every time.
53 */
54 msleep(100);
55 } else {
56 /*
57 * For the hubs which are compliant with the spec,
58 * put the port in SUSPEND.
59 */
60 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
61 USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
62 portnum, NULL, 0, 1000, GFP_KERNEL);
63 }
64 return ret;
65}
66
67static int ehset_probe(struct usb_interface *intf,
68 const struct usb_device_id *id)
69{
70 int ret = -EINVAL;
71 struct usb_device *dev = interface_to_usbdev(intf);
72 struct usb_device *hub_udev = dev->parent;
73 struct usb_device_descriptor buf;
74 u8 portnum = dev->portnum;
75 u16 test_pid = le16_to_cpu(dev->descriptor.idProduct);
76
77 switch (test_pid) {
78 case TEST_SE0_NAK_PID:
79 ret = ehset_prepare_port_for_testing(hub_udev, portnum);
80 if (!ret)
81 break;
82 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
83 USB_RT_PORT, USB_PORT_FEAT_TEST,
84 (USB_TEST_SE0_NAK << 8) | portnum,
85 NULL, 0, 1000, GFP_KERNEL);
86 break;
87 case TEST_J_PID:
88 ret = ehset_prepare_port_for_testing(hub_udev, portnum);
89 if (!ret)
90 break;
91 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
92 USB_RT_PORT, USB_PORT_FEAT_TEST,
93 (USB_TEST_J << 8) | portnum, NULL, 0,
94 1000, GFP_KERNEL);
95 break;
96 case TEST_K_PID:
97 ret = ehset_prepare_port_for_testing(hub_udev, portnum);
98 if (!ret)
99 break;
100 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
101 USB_RT_PORT, USB_PORT_FEAT_TEST,
102 (USB_TEST_K << 8) | portnum, NULL, 0,
103 1000, GFP_KERNEL);
104 break;
105 case TEST_PACKET_PID:
106 ret = ehset_prepare_port_for_testing(hub_udev, portnum);
107 if (!ret)
108 break;
109 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
110 USB_RT_PORT, USB_PORT_FEAT_TEST,
111 (USB_TEST_PACKET << 8) | portnum,
112 NULL, 0, 1000, GFP_KERNEL);
113 break;
114 case TEST_HS_HOST_PORT_SUSPEND_RESUME:
115 /* Test: wait for 15secs -> suspend -> 15secs delay -> resume */
116 msleep(15 * 1000);
117 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
118 USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
119 portnum, NULL, 0, 1000, GFP_KERNEL);
120 if (ret < 0)
121 break;
122
123 msleep(15 * 1000);
124 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_CLEAR_FEATURE,
125 USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
126 portnum, NULL, 0, 1000, GFP_KERNEL);
127 break;
128 case TEST_SINGLE_STEP_GET_DEV_DESC:
129 /* Test: wait for 15secs -> GetDescriptor request */
130 msleep(15 * 1000);
131
132 ret = usb_control_msg_recv(dev, 0, USB_REQ_GET_DESCRIPTOR,
133 USB_DIR_IN, USB_DT_DEVICE << 8, 0,
134 &buf, USB_DT_DEVICE_SIZE,
135 USB_CTRL_GET_TIMEOUT, GFP_KERNEL);
136 break;
137 case TEST_SINGLE_STEP_SET_FEATURE:
138 /*
139 * GetDescriptor SETUP request -> 15secs delay -> IN & STATUS
140 *
141 * Note, this test is only supported on root hubs since the
142 * SetPortFeature handling can only be done inside the HCD's
143 * hub_control callback function.
144 */
145 if (hub_udev != dev->bus->root_hub) {
146 dev_err(&intf->dev, "SINGLE_STEP_SET_FEATURE test only supported on root hub\n");
147 break;
148 }
149
150 ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
151 USB_RT_PORT, USB_PORT_FEAT_TEST,
152 (6 << 8) | portnum, NULL, 0,
153 60 * 1000, GFP_KERNEL);
154
155 break;
156 default:
157 dev_err(&intf->dev, "%s: unsupported PID: 0x%x\n",
158 __func__, test_pid);
159 }
160
161 return ret;
162}
163
164static void ehset_disconnect(struct usb_interface *intf)
165{
166}
167
168static const struct usb_device_id ehset_id_table[] = {
169 { USB_DEVICE(0x1a0a, TEST_SE0_NAK_PID) },
170 { USB_DEVICE(0x1a0a, TEST_J_PID) },
171 { USB_DEVICE(0x1a0a, TEST_K_PID) },
172 { USB_DEVICE(0x1a0a, TEST_PACKET_PID) },
173 { USB_DEVICE(0x1a0a, TEST_HS_HOST_PORT_SUSPEND_RESUME) },
174 { USB_DEVICE(0x1a0a, TEST_SINGLE_STEP_GET_DEV_DESC) },
175 { USB_DEVICE(0x1a0a, TEST_SINGLE_STEP_SET_FEATURE) },
176 { } /* Terminating entry */
177};
178MODULE_DEVICE_TABLE(usb, ehset_id_table);
179
180static struct usb_driver ehset_driver = {
181 .name = "usb_ehset_test",
182 .probe = ehset_probe,
183 .disconnect = ehset_disconnect,
184 .id_table = ehset_id_table,
185};
186
187module_usb_driver(ehset_driver);
188
189MODULE_DESCRIPTION("USB Driver for EHSET Test Fixture");
190MODULE_LICENSE("GPL v2");