On Sat, May 24, 2014 at 05:09:02PM +0530, Pratyush Anand wrote:
> OTG3 and EH Compliance Plan 1.0 talks about Super Speed OTG Verification
> system (SS-OVS) which consists of an excersizer and analyzer.
>
> USB Compliance Suite from Lecroy or Ellisys can act as such SS-OVS for
> Link Layer Validation (LVS).
>
> Some modifications are needed for an embedded Linux USB host to pass all
> these tests. Most of these tests require just Link to be in U0. They do
> not work with default Linux USB stack since, default stack does port
> reset and then starts sending setup packet, which is not expected by
> Link Layer Validation (LVS) device of Lecroy Compliance Suit. Then,
> There are many Link Layer Tests which need host to generate specific
> traffic.
>
> This patch supports specific traffic generation cases. As of now all the
> host Lecroy Link Layer-USBIF tests (except TD7.26) passes
> with this patch for single run using Lecroy USB Compliance Suite
> Version 1.98 Build 239 and Lecroy USB Protocol Analyzer version 4.80
> Build 1603. Therefore patch seems to be a good candidate for inclusion.
> Further modification can be done on top of it.
>
> lvstest driver will not bind to any device by default. It can bind
> manually to a super speed USB host controller root hub. Therefore, regular
> hub driver must be unbound before this driver is bound. For example, if
> 2-0:1.0 is the xhci root hub, then execute following to unbind hub driver.
>
> echo 2-0:1.0 > /sys/bus/usb/drivers/hub/unbind
>
> Then write Linux Foundation's vendor ID which is used by root hubs and
> SS root hub's device ID into new_id file. Writing IDs into new_id file
> will also bind the lvs driver with any available SS root hub interfaces.
>
> echo "1D6B 3" > /sys/bus/usb/drivers/lvs/new_id
>
> Now connect LVS device with root hub port.
>
> Test case specific traffic can be generated as follows whenever needed:
>
> 1. To issue "Get Device descriptor" command for TD.7.06:
> echo > /sys/bus/usb/devices/2-0\:1.0/get_dev_desc
>
> 2. To set U1 timeout to 127 for TD.7.18
> echo 127 > /sys/bus/usb/devices/2-0\:1.0/u1_timeout
>
> 3. To set U2 timeout to 0 for TD.7.18
> echo 0 > /sys/bus/usb/devices/2-0\:1.0/u2_timeout
>
> 4. To issue "Hot Reset" for TD.7.29
> echo > /sys/bus/usb/devices/2-0\:1.0/hot_reset
>
> 5. To issue "U3 Entry" for TD.7.35
> echo > /sys/bus/usb/devices/2-0\:1.0/u3_entry
>
> 6. To issue "U3 Exit" for TD.7.36
> echo > /sys/bus/usb/devices/2-0\:1.0/u3_exit
>
> Signed-off-by: Pratyush Anand <pratyush.anand@xxxxxx>
> Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> ---
> Documentation/ABI/testing/sysfs-bus-usb-lvstest | 47 +++
> drivers/usb/misc/Kconfig | 7 +
> drivers/usb/misc/Makefile | 1 +
> drivers/usb/misc/lvstest.c | 452 ++++++++++++++++++++++++
> 4 files changed, 507 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-bus-usb-lvstest
> create mode 100644 drivers/usb/misc/lvstest.c
Did you build this code?
It fails for me with:
In file included from drivers/usb/misc/lvstest.c:16:0:
include/linux/module.h:138:40: error: ‘__mod_usb__lvs_id_table_device_table’ aliased to undefined symbol ‘lvs_id_table’
extern const struct type##_device_id __mod_##type##__##name##_device_table \
^
drivers/usb/misc/lvstest.c:431:1: note: in expansion of macro ‘MODULE_DEVICE_TABLE’
MODULE_DEVICE_TABLE(usb, lvs_id_table);
^
> +MODULE_DEVICE_TABLE(usb, lvs_id_table);
Yeah, that line is the problem, and proof you didn't build this :(
> +static struct usb_driver lvs_driver = {
> + .name = "lvs",
> + .probe = lvs_rh_probe,
> + .disconnect = lvs_rh_disconnect,
> +};
> +
> +static int __init lvs_init(void)
> +{
> + return usb_register(&lvs_driver);
> +}
> +module_init(lvs_init);
> +
> +static void __exit lvs_exit(void)
> +{
> + usb_deregister(&lvs_driver);
> +}
> +module_exit(lvs_exit);
Use module_usb_driver() instead of these two functions please.
And test your code.
bah,
greg k-h
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