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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/ch11.h>
#define TEST_SE0_NAK_PID 0x0101
#define TEST_J_PID 0x0102
#define TEST_K_PID 0x0103
#define TEST_PACKET_PID 0x0104
#define TEST_HS_HOST_PORT_SUSPEND_RESUME 0x0106
#define TEST_SINGLE_STEP_GET_DEV_DESC 0x0107
#define TEST_SINGLE_STEP_SET_FEATURE 0x0108
extern const struct usb_device_id *usb_device_match_id(struct usb_device *udev,
const struct usb_device_id *id);
/*
* A list of USB hubs which requires to disable the power
* to the port before starting the testing procedures.
*/
static const struct usb_device_id ehset_hub_list[] = {
{ USB_DEVICE(0x0424, 0x4502) },
{ USB_DEVICE(0x0424, 0x4913) },
{ USB_DEVICE(0x0451, 0x8027) },
{ }
};
static int ehset_prepare_port_for_testing(struct usb_device *hub_udev, u16 portnum)
{
int ret = 0;
/*
* The USB2.0 spec chapter 11.24.2.13 says that the USB port which is
* going under test needs to be put in suspend before sending the
* test command. Most hubs don't enforce this precondition, but there
* are some hubs which needs to disable the power to the port before
* starting the test.
*/
if (usb_device_match_id(hub_udev, ehset_hub_list)) {
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_CLEAR_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_ENABLE,
portnum, NULL, 0, 1000, GFP_KERNEL);
/*
* Wait for the port to be disabled. It's an arbitrary value
* which worked every time.
*/
msleep(100);
} else {
/*
* For the hubs which are compliant with the spec,
* put the port in SUSPEND.
*/
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
portnum, NULL, 0, 1000, GFP_KERNEL);
}
return ret;
}
static int ehset_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
int ret = -EINVAL;
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_device *hub_udev = dev->parent;
struct usb_device_descriptor buf;
u8 portnum = dev->portnum;
u16 test_pid = le16_to_cpu(dev->descriptor.idProduct);
switch (test_pid) {
case TEST_SE0_NAK_PID:
ret = ehset_prepare_port_for_testing(hub_udev, portnum);
if (!ret)
break;
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_TEST,
(USB_TEST_SE0_NAK << 8) | portnum,
NULL, 0, 1000, GFP_KERNEL);
break;
case TEST_J_PID:
ret = ehset_prepare_port_for_testing(hub_udev, portnum);
if (!ret)
break;
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_TEST,
(USB_TEST_J << 8) | portnum, NULL, 0,
1000, GFP_KERNEL);
break;
case TEST_K_PID:
ret = ehset_prepare_port_for_testing(hub_udev, portnum);
if (!ret)
break;
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_TEST,
(USB_TEST_K << 8) | portnum, NULL, 0,
1000, GFP_KERNEL);
break;
case TEST_PACKET_PID:
ret = ehset_prepare_port_for_testing(hub_udev, portnum);
if (!ret)
break;
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_TEST,
(USB_TEST_PACKET << 8) | portnum,
NULL, 0, 1000, GFP_KERNEL);
break;
case TEST_HS_HOST_PORT_SUSPEND_RESUME:
/* Test: wait for 15secs -> suspend -> 15secs delay -> resume */
msleep(15 * 1000);
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
portnum, NULL, 0, 1000, GFP_KERNEL);
if (ret < 0)
break;
msleep(15 * 1000);
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_CLEAR_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
portnum, NULL, 0, 1000, GFP_KERNEL);
break;
case TEST_SINGLE_STEP_GET_DEV_DESC:
/* Test: wait for 15secs -> GetDescriptor request */
msleep(15 * 1000);
ret = usb_control_msg_recv(dev, 0, USB_REQ_GET_DESCRIPTOR,
USB_DIR_IN, USB_DT_DEVICE << 8, 0,
&buf, USB_DT_DEVICE_SIZE,
USB_CTRL_GET_TIMEOUT, GFP_KERNEL);
break;
case TEST_SINGLE_STEP_SET_FEATURE:
/*
* GetDescriptor SETUP request -> 15secs delay -> IN & STATUS
*
* Note, this test is only supported on root hubs since the
* SetPortFeature handling can only be done inside the HCD's
* hub_control callback function.
*/
if (hub_udev != dev->bus->root_hub) {
dev_err(&intf->dev, "SINGLE_STEP_SET_FEATURE test only supported on root hub\n");
break;
}
ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
USB_RT_PORT, USB_PORT_FEAT_TEST,
(6 << 8) | portnum, NULL, 0,
60 * 1000, GFP_KERNEL);
break;
default:
dev_err(&intf->dev, "%s: unsupported PID: 0x%x\n",
__func__, test_pid);
}
return ret;
}
static void ehset_disconnect(struct usb_interface *intf)
{
}
static const struct usb_device_id ehset_id_table[] = {
{ USB_DEVICE(0x1a0a, TEST_SE0_NAK_PID) },
{ USB_DEVICE(0x1a0a, TEST_J_PID) },
{ USB_DEVICE(0x1a0a, TEST_K_PID) },
{ USB_DEVICE(0x1a0a, TEST_PACKET_PID) },
{ USB_DEVICE(0x1a0a, TEST_HS_HOST_PORT_SUSPEND_RESUME) },
{ USB_DEVICE(0x1a0a, TEST_SINGLE_STEP_GET_DEV_DESC) },
{ USB_DEVICE(0x1a0a, TEST_SINGLE_STEP_SET_FEATURE) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, ehset_id_table);
static struct usb_driver ehset_driver = {
.name = "usb_ehset_test",
.probe = ehset_probe,
.disconnect = ehset_disconnect,
.id_table = ehset_id_table,
};
module_usb_driver(ehset_driver);
MODULE_DESCRIPTION("USB Driver for EHSET Test Fixture");
MODULE_LICENSE("GPL v2");
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