![Manu Gautam](/assets/img/avatar_default.png)
The USB Embedded High-speed Host Electrical Test (EHSET) defines the SINGLE_STEP_SET_FEATURE test as follows: 1) The host enumerates the test device with VID:0x1A0A, PID:0x0108 2) The host sends the SETUP stage of a GetDescriptor(Device) 3) The device ACKs the request 4) The host issues SOFs for 15 seconds allowing the test operator to raise the scope trigger just above the SOF voltage level 5) The host sends the IN packet 6) The device sends data in response, triggering the scope 7) The host sends an ACK in response to the data This patch adds additional handling to the EHCI hub driver and allows the EHSET driver to initiate this test mode by issuing a a SetFeature request to the root hub with a Test Selector value of 0x06. From there it mimics ehci_urb_enqueue() but separately submits QTDs for the SETUP and DATA/STATUS stages in order to insert a delay in between. Signed-off-by: Manu Gautam <mgautam@codeaurora.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> [jackp@codeaurora.org: imported from commit c2084930 on codeaurora.org; minor cleanup and updated author email] Signed-off-by: Jack Pham <jackp@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
153 lines
4.5 KiB
C
153 lines
4.5 KiB
C
/*
|
|
* Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#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
|
|
|
|
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 = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_TEST,
|
|
(TEST_SE0_NAK << 8) | portnum,
|
|
NULL, 0, 1000);
|
|
break;
|
|
case TEST_J_PID:
|
|
ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_TEST,
|
|
(TEST_J << 8) | portnum,
|
|
NULL, 0, 1000);
|
|
break;
|
|
case TEST_K_PID:
|
|
ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_TEST,
|
|
(TEST_K << 8) | portnum,
|
|
NULL, 0, 1000);
|
|
break;
|
|
case TEST_PACKET_PID:
|
|
ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_TEST,
|
|
(TEST_PACKET << 8) | portnum,
|
|
NULL, 0, 1000);
|
|
break;
|
|
case TEST_HS_HOST_PORT_SUSPEND_RESUME:
|
|
/* Test: wait for 15secs -> suspend -> 15secs delay -> resume */
|
|
msleep(15 * 1000);
|
|
ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_SUSPEND, portnum,
|
|
NULL, 0, 1000);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
msleep(15 * 1000);
|
|
ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_CLEAR_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_SUSPEND, portnum,
|
|
NULL, 0, 1000);
|
|
break;
|
|
case TEST_SINGLE_STEP_GET_DEV_DESC:
|
|
/* Test: wait for 15secs -> GetDescriptor request */
|
|
msleep(15 * 1000);
|
|
buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
|
|
USB_DT_DEVICE << 8, 0,
|
|
buf, USB_DT_DEVICE_SIZE,
|
|
USB_CTRL_GET_TIMEOUT);
|
|
kfree(buf);
|
|
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(hub_udev, usb_sndctrlpipe(hub_udev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT,
|
|
USB_PORT_FEAT_TEST,
|
|
(6 << 8) | portnum,
|
|
NULL, 0, 60 * 1000);
|
|
|
|
break;
|
|
default:
|
|
dev_err(&intf->dev, "%s: unsupported PID: 0x%x\n",
|
|
__func__, test_pid);
|
|
}
|
|
|
|
return (ret < 0) ? ret : 0;
|
|
}
|
|
|
|
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");
|