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USB: core: Add support for OTG automated compliance tests 

1. Add OTG PET device to TPL. OTG device shall support this
device for allowing compliance automated testing.

2. Add otg_srp_reqd filed to gadget. OTG B-device shall enable
this flag when OTG PET (Protocol and Electrical Tester) that
acts as A-device sends Set Feature TEST_MODE with wIndex high
byte value = 0x06.  OTG PET expects B-device to initiate SRP
after the end of current session.

3. Add otg_vbus_off to usb_bus.  USB core enables this flag
when OTG PET enumerates with bcdDevice[0] field in its Device
Descriptor is equal to 1.  OTG PET expects A-device to turn off
the VBUS with in 5 sec of its disconnection which allows it to
initiate SRP.

3. Add support to identify OTG PET and start HNP quickly.

Change-Id: Ib1f4d835d00ca29ff8f980c94d75a3890507dedc
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
This commit is contained in:
Vijayavardhan Vennapusa 2012-01-18 14:16:55 +05:30 committed by Stephen Boyd
parent 6b451c7567
commit 6eb16ea80f
7 changed files with 37 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/usb/core/hub.c
View File

@ -2156,6 +2156,7 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
int err = 0;
#ifdef CONFIG_USB_OTG
bool old_otg = false;
/*
* OTG-aware devices on OTG-capable root hubs may be able to use SRP,
* to wake us after we've powered off VBUS; and HNP, switching roles
@ -2221,6 +2222,13 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
}
}
out:
if ((udev->quirks & USB_QUIRK_OTG_PET)) {
if (le16_to_cpu(udev->descriptor.bcdDevice) &
OTG_TTST_VBUS_OFF)
udev->bus->otg_vbus_off = 1;
if (udev->bus->is_b_host || old_otg)
udev->bus->quick_hnp = 1;
}
if (!is_targeted(udev)) {

5
drivers/usb/core/otg_whitelist.h
View File

@ -59,6 +59,11 @@ static int is_targeted(struct usb_device *dev)
le16_to_cpu(dev->descriptor.idProduct) == 0xbadd))
return 0;
/* OTG PET device is always targeted (see OTG 2.0 ECN 6.4.2) */
if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a &&
le16_to_cpu(dev->descriptor.idProduct) == 0x0200))
return 1;
/* NOTE: can't use usb_match_id() since interface caches
* aren't set up yet. this is cut/paste from that code.
*/

3
drivers/usb/core/quirks.c
View File

@ -138,6 +138,9 @@ static const struct usb_device_id usb_quirk_list[] = {
/* INTEL VALUE SSD */
{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
/* Protocol and OTG Electrical Test Device */
{ USB_DEVICE(0x1a0a, 0x0200), .driver_info = USB_QUIRK_OTG_PET },
{ } /* terminating entry must be last */
};

7
include/linux/usb.h
View File

@ -338,6 +338,13 @@ struct usb_bus {
* with the URB_SHORT_NOT_OK flag set.
*/
unsigned hnp_support:1; /* OTG: HNP is supported on OTG port */
unsigned quick_hnp:1; /* OTG: Indiacates if hnp is required
irrespective of host_request flag
*/
unsigned otg_vbus_off:1; /* OTG: OTG test device feature bit that
* tells A-device to turn off VBUS after
* B-device is disconnected.
*/
struct delayed_work hnp_polling;/* OTG: HNP polling work */
unsigned sg_tablesize; /* 0 or largest number of sg list entries */

3
include/linux/usb/gadget.h
View File

@ -498,6 +498,8 @@ struct usb_gadget_ops {
* @b_hnp_enable: OTG device feature flag, indicating that the A-Host
* enabled HNP support.
* @host_request: A flag set by user when wishes to take up host role.
* @otg_srp_reqd: OTG test mode feature to initiate SRP after the end of
* current session.
* @name: Identifies the controller hardware type. Used in diagnostics
* and sometimes configuration.
* @dev: Driver model state for this abstract device.
@ -538,6 +540,7 @@ struct usb_gadget {
unsigned a_hnp_support:1;
unsigned a_alt_hnp_support:1;
unsigned host_request:1;
unsigned otg_srp_reqd:1;
const char *name;
struct device dev;
unsigned out_epnum;

2
include/linux/usb/quirks.h
View File

@ -30,4 +30,6 @@
descriptor */
#define USB_QUIRK_DELAY_INIT 0x00000040
#define USB_QUIRK_OTG_PET 0x00000080
#endif /* __LINUX_USB_QUIRKS_H */

9
include/uapi/linux/usb/ch9.h
View File

@ -136,6 +136,12 @@
#define TEST_PACKET 4
#define TEST_FORCE_EN 5
/* OTG test mode feature bits
* See ECN OTG2.0 spec Table 6-8
*/
#define TEST_OTG_SRP_REQD 6
#define TEST_OTG_HNP_REQD 7
/*
* New Feature Selectors as added by USB 3.0
* See USB 3.0 spec Table 9-7
@ -163,6 +169,9 @@
#define OTG_STATUS_SELECTOR 0xF000
#define HOST_REQUEST_FLAG 0
#define THOST_REQ_POLL 1500 /* msec (1000 - 2000) */
#define OTG_TTST_SUSP 70 /* msec (0 - 100) */
#define OTG_TTST_VBUS_OFF 1
/* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
#define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */