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Subject[PATCH 3.4 27/60] staging: vt6656: [BUG] Fix for TX USB resets from vendors driver.
Date
3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Malcolm Priestley <tvboxspy@gmail.com>

commit 9df682927c2e3a92f43803d6b52095992e3b2ab8 upstream.

This fixes resets on heavy TX data traffic.

Vendor driver
VT6656_Linux_src_v1.21.03_x86_11.04.zip
http://www.viaembedded.com/servlet/downloadSvl?id=1890&download_file_id=14704
This is GPL-licensed code.

original code
BBbVT3184Init
...
//2007-0725, RobertChang add, Enable Squelch detect reset option(SQ_RST_Opt), USB (register4, bit1)
CONTROLnsRequestIn(pDevice,
MESSAGE_TYPE_READ,
(WORD)0x600+4, // USB's Reg4's bit1
MESSAGE_REQUEST_MEM,
1,
(PBYTE) &byData);
byData = byData|2 ;
CONTROLnsRequestOut(pDevice,
MESSAGE_TYPE_WRITE,
(WORD)0x600+4, // USB's Reg4's bit1
MESSAGE_REQUEST_MEM,
1,
(PBYTE) &byData);

return TRUE;//ntStatus;
....

A back port patch is needed for kernels less than 3.10.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/staging/vt6656/baseband.c | 11 +++++++++++
drivers/staging/vt6656/rndis.h | 1 +
2 files changed, 12 insertions(+)

--- a/drivers/staging/vt6656/baseband.c
+++ b/drivers/staging/vt6656/baseband.c
@@ -976,6 +976,7 @@ BOOL BBbVT3184Init(PSDevice pDevice)
PBYTE pbyAgc;
WORD wLengthAgc;
BYTE abyArray[256];
+ u8 data;

ntStatus = CONTROLnsRequestIn(pDevice,
MESSAGE_TYPE_READ,
@@ -1144,6 +1145,16 @@ else {
ControlvWriteByte(pDevice,MESSAGE_REQUEST_BBREG,0x0D,0x01);

RFbRFTableDownload(pDevice);
+
+ /* Fix for TX USB resets from vendors driver */
+ CONTROLnsRequestIn(pDevice, MESSAGE_TYPE_READ, USB_REG4,
+ MESSAGE_REQUEST_MEM, sizeof(data), &data);
+
+ data |= 0x2;
+
+ CONTROLnsRequestOut(pDevice, MESSAGE_TYPE_WRITE, USB_REG4,
+ MESSAGE_REQUEST_MEM, sizeof(data), &data);
+
return TRUE;//ntStatus;
}

--- a/drivers/staging/vt6656/rndis.h
+++ b/drivers/staging/vt6656/rndis.h
@@ -69,6 +69,7 @@

#define VIAUSB20_PACKET_HEADER 0x04

+#define USB_REG4 0x604

/*--------------------- Export Classes ----------------------------*/




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