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Commit d7d18b2a authored by Chandana Kishori Chiluveru's avatar Chandana Kishori Chiluveru
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usb: f_gsi: Increase GPS EP maxpacket size to 64bytes 



Currently usb driver is using 8 bytes request on interrupt endpoint
for all CDC functions. GPS host driver is expecting short packet/zero
length packet on interrupt endpoint and failing the transfer with 8 bytes
maxpacket. Increase the maxpacket size to 64 bytes so that host ends
the transfer with a short packet.

Change-Id: Icc9919fbd633468d3cc7d4d8ab1945730cdc7c06
Signed-off-by: default avatarChandana Kishori Chiluveru <cchiluve@codeaurora.org>
parent fa70a0f5

drivers/usb/gadget/function/f_gsi.h

+5 −4
Original line number Diff line number Diff line
@@ -343,6 +343,7 @@ static enum usb_prot_id name_to_prot_id(const char *name) 


#define LOG2_STATUS_INTERVAL_MSEC 5

#define MAX_NOTIFY_SIZE sizeof(struct usb_cdc_notification)

#define GPS_MAX_NOTIFY_SIZE 64



/* rmnet device descriptors */
@@ -1451,7 +1452,7 @@ static struct usb_endpoint_descriptor gps_fs_notify_desc = { 
	.bDescriptorType =	USB_DT_ENDPOINT,

	.bEndpointAddress =	USB_DIR_IN,

	.bmAttributes =		USB_ENDPOINT_XFER_INT,

	.wMaxPacketSize =	cpu_to_le16(MAX_NOTIFY_SIZE),

	.wMaxPacketSize =	cpu_to_le16(GPS_MAX_NOTIFY_SIZE),

	.bInterval =		1 << LOG2_STATUS_INTERVAL_MSEC,

};
@@ -1467,7 +1468,7 @@ static struct usb_endpoint_descriptor gps_hs_notify_desc = { 
	.bDescriptorType =	USB_DT_ENDPOINT,

	.bEndpointAddress =	USB_DIR_IN,

	.bmAttributes =		USB_ENDPOINT_XFER_INT,

	.wMaxPacketSize =	cpu_to_le16(MAX_NOTIFY_SIZE),

	.wMaxPacketSize =	cpu_to_le16(GPS_MAX_NOTIFY_SIZE),

	.bInterval =		LOG2_STATUS_INTERVAL_MSEC + 4,

};
@@ -1483,7 +1484,7 @@ static struct usb_endpoint_descriptor gps_ss_notify_desc = { 
	.bDescriptorType =	USB_DT_ENDPOINT,

	.bEndpointAddress =	USB_DIR_IN,

	.bmAttributes =		USB_ENDPOINT_XFER_INT,

	.wMaxPacketSize =	cpu_to_le16(MAX_NOTIFY_SIZE),

	.wMaxPacketSize =	cpu_to_le16(GPS_MAX_NOTIFY_SIZE),

	.bInterval =		LOG2_STATUS_INTERVAL_MSEC + 4,

};
@@ -1494,7 +1495,7 @@ static struct usb_ss_ep_comp_descriptor gps_ss_notify_comp_desc = { 
	/* the following 3 values can be tweaked if necessary */

	/* .bMaxBurst =		0, */

	/* .bmAttributes =	0, */

	.wBytesPerInterval =	cpu_to_le16(MAX_NOTIFY_SIZE),

	.wBytesPerInterval =	cpu_to_le16(GPS_MAX_NOTIFY_SIZE),

};



static struct usb_descriptor_header *gps_ss_function[] = {