diff options
Diffstat (limited to 'drivers/usb/misc/otg-eh-test.c')
| -rw-r--r-- | drivers/usb/misc/otg-eh-test.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/usb/misc/otg-eh-test.c b/drivers/usb/misc/otg-eh-test.c new file mode 100644 index 000000000000..d638149d809f --- /dev/null +++ b/drivers/usb/misc/otg-eh-test.c @@ -0,0 +1,241 @@ +/** + * otg-eh-test.c - OTG & Embedded Host Test Support Driver + * + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com + * + * Author: Felipe Balbi <balbi@ti.com> + * + * This program is free software: you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * 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/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/usb.h> + +#include <linux/usb/ch11.h> +#include <linux/usb/ch9.h> + +#define USB_IF_TEST_VID 0x1a0a + +#define USB_IF_TEST_SE0_NAK 0x0101 +#define USB_IF_TEST_J 0x0102 +#define USB_IF_TEST_K 0x0103 +#define USB_IF_TEST_PACKET 0x0104 +#define USB_IF_HS_HOST_PORT_SUSPEND_RESUME 0x0106 +#define USB_IF_SINGLE_STEP_GET_DEV_DESC 0x0107 +#define USB_IF_SINGLE_STEP_GET_DEV_DESC_DATA 0x0108 + +#define USB_IF_PROTOCOL_OTG_ELECTRICAL_TEST 0x0200 + +static int usb_set_hub_port_test(struct usb_device *udev, int test) +{ + struct usb_device *hub = udev->parent; + int port = udev->portnum; + + return usb_control_msg(hub, usb_sndctrlpipe(hub, 0), + USB_REQ_SET_FEATURE, USB_RT_PORT, USB_PORT_FEAT_TEST, + (test << 8) | port, NULL, 0, 1000); +} + +static int otg_eh_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device_descriptor desc; + struct usb_device *udev; + int ret; + + udev = interface_to_usbdev(intf); + + usb_enable_autosuspend(udev); + usb_autopm_get_interface(intf); + + switch (id->idProduct) { + case USB_IF_TEST_SE0_NAK: + /* + * Upon enumerating VID 0x1A0A/PID 0x0101, the host’s + * downstream port shall enter a high-speed receive mode as + * described in Section 7.1.20 [USB2.0] and drives an SE0 until + * the controller is reset. + */ + usb_set_hub_port_test(udev, TEST_SE0_NAK); + break; + case USB_IF_TEST_J: + /* + * Upon enumerating VID 0x1A0A/PID 0x0102, the host’s + * downstream port shall enter a high-speed J state as + * described in Section 7.1.20 of [USB2.0] until the host + * controller is reset. + */ + usb_set_hub_port_test(udev, TEST_J); + break; + case USB_IF_TEST_K: + /* + * Upon enumerating VID 0x1A0A/PID 0x0103, the host’s + * downstream port shall enter a high-speed K state as + * described in Section 7.1.20 of [USB2.0] until the host + * controller is reset. + */ + usb_set_hub_port_test(udev, TEST_K); + break; + case USB_IF_TEST_PACKET: + /* + * Upon enumerating VID 0x1A0A/PID 0x0104, the host shall begin + * sending test packets as described in Section 7.1.20 of + * [USB2.0] until the host controller is reset. + */ + usb_set_hub_port_test(udev, TEST_PACKET); + break; + case USB_IF_HS_HOST_PORT_SUSPEND_RESUME: + /* + * Upon enumerating VID:0x1A0A/PID 0x0106, the host shall + * continue sending SOFs for 15 seconds, then suspend the + * downstream port under test per Section 7.1.7.6.1 of + * [USB2.0]. After 15 seconds has elapsed, the host shall issue + * a ResumeK state on the bus, then continue sending SOFs. + */ + msleep(15000); + usb_autopm_put_interface(intf); + msleep(15000); + usb_autopm_get_interface(intf); + break; + case USB_IF_SINGLE_STEP_GET_DEV_DESC: + /* + * When the host discovers a device with VID:0x1A0A/PID 0x0107, + * the following steps are executed by the host and the device. + * + * 1. The host enumerates the test device, reads VID:0x1A0A/PID + * 0x0107, then completes its enumeration procedure. + * + * 2. The host issues SOFs for 15 seconds allowing the test + * engineer to raise the scope trigger just above the SOF + * voltage level. + * + * 3. The host sends a complete GetDescriptor(Device) transfer + * + * 4. The device ACKs the request, triggering the scope. (Note: + * SOFs continue.) + */ + msleep(15000); + ret = usb_get_descriptor(udev, USB_DT_DEVICE, 0, &desc, USB_DT_DEVICE_SIZE); + if (ret < 0) + dev_err(&intf->dev, "failed to get device descriptor\n"); + + break; + case USB_IF_SINGLE_STEP_GET_DEV_DESC_DATA: + /* + * When the host discovers a device with VID:0x1A0A/PID 0x0108, + * the following steps are executed by the host and the device. + * + * 1. The host enumerates the test device and reads + * VID:0x1A0A/PID 0x0108, then completes its enumeration + * procedure + * + * 2. After enumerating the device, the host sends + * GetDescriptor(Device) + * + * 3. The device ACKs the request + * + * 4. The host issues SOFs for 15 seconds allowing the test + * engineer to raise the scope trigger just above the SOF + * voltage level + * + * 5. The host sends an IN packet + * + * 6. The device sends data in response to the IN packet, + * triggering the scope + * + * 7. The host sends an ACK in response to the data. (Note: + * SOFs may follow the IN transaction). + */ + ret = usb_get_descriptor(udev, USB_DT_DEVICE, 0, &desc, USB_DT_DEVICE_SIZE); + if (ret < 0) + dev_err(&intf->dev, "failed to get device descriptor\n"); + msleep(15000); + break; + case USB_IF_PROTOCOL_OTG_ELECTRICAL_TEST: + /* OTG-A Device */ + if (udev->bus->otg_port == udev->portnum) { + ret = usb_driver_set_configuration(udev, 1); + if (ret < 0) + dev_err(&intf->dev, "unable to set configuration #1\n"); + } else if (udev->bus->is_b_host) { + /* configuration -1 means "unconfigured" */ + ret = usb_driver_set_configuration(udev, -1); + if (ret < 0) + dev_err(&intf->dev, "unable to unconfigure device\n"); + + /* forcefully suspend */ + usb_autopm_put_interface(intf); + } + + break; + default: + dev_err(&intf->dev, "Unsupported device\n"); + } + + usb_disable_autosuspend(udev); + + return 0; +} + +static void otg_eh_disconnect(struct usb_interface *intf) +{ + struct usb_device *udev; + + udev = interface_to_usbdev(intf); + + usb_lock_device_for_reset(udev, intf); + usb_reset_device(udev); + usb_unlock_device(udev); +} + +static const struct usb_device_id otg_eh_id_table[] __devinitconst = { + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_TEST_SE0_NAK), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_TEST_J), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_TEST_K), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_TEST_PACKET), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_HS_HOST_PORT_SUSPEND_RESUME), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_SINGLE_STEP_GET_DEV_DESC), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_SINGLE_STEP_GET_DEV_DESC_DATA), }, + { USB_DEVICE(USB_IF_TEST_VID, USB_IF_PROTOCOL_OTG_ELECTRICAL_TEST), }, + + { } /* Terminating Entry */ +}; +MODULE_DEVICE_TABLE(usb, otg_eh_id_table); + +static struct usb_driver otg_eh_driver = { + .name = "otg-eh-test", + .probe = otg_eh_probe, + .disconnect = otg_eh_disconnect, + .id_table = otg_eh_id_table, + .supports_autosuspend = true, +}; + +module_usb_driver(otg_eh_driver); + +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("USB OTG & EH Test Driver"); |