[PATCH/RFC 3/5] usb:g_zero: bulk in/out unittest support

Tatyana Brokhman
2011-06-16T13:33:12Z

This commit adds a new vendor specific request to be handled by the
g_zero module in it's sourcesink configuration. The purpose if this
request is to update the length of the BULK transfer to a given value.
The bRequest value of the new control request is 0x5e.
It is used by the user-space Unit testing application for bulk in/out
tests.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>

---
drivers/usb/gadget/f_sourcesink.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
index caf2f95..d417b8a 100644
--- a/drivers/usb/gadget/f_sourcesink.c
+++ b/drivers/usb/gadget/f_sourcesink.c
@@ -70,6 +70,7 @@ static unsigned pattern;
module_param(pattern, uint, 0);
MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63 ");

+static struct f_sourcesink *the_sourcesink;
/*-------------------------------------------------------------------------*/

static struct usb_interface_descriptor source_sink_intf = {
@@ -197,6 +198,7 @@ static void
sourcesink_unbind(struct usb_configuration *c, struct usb_function *f)
{
kfree(func_to_ss(f));
+ the_sourcesink = NULL;
}

/* optionally require specific source/sink data patterns */
@@ -425,6 +427,7 @@ static int __init sourcesink_bind_config(struct usb_configuration *c)
status = usb_add_function(c, &ss->function);
if (status)
kfree(ss);
+ the_sourcesink = ss;
return status;
}

@@ -472,6 +475,15 @@ static int sourcesink_setup(struct usb_configuration *c,
value = w_length;
break;

+ case 0x5e:
+ /*
+ * Change bulk ep buffer size. buflen is the length of
+ * the BULK transfer (req->length=buflen). Defined in g_zero.h
+ */
+ disable_source_sink(the_sourcesink);
+ buflen = w_value;
+ value = enable_source_sink(c->cdev, the_sourcesink);
+ break;
default:
unknown:
VDBG(c->cdev,
--
1.7.3.3

--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.