From: macpaul.lin@mediatek.com
To: Lars Melin <larsm17@gmail.com>
Cc: Oliver Neukum <oneukum@suse.com>,
Andrey Arapov <andrey.arapov@gmail.com>,
Johan Hovold <johan@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mediatek WSD Upstream <wsd_upstream@mediatek.com>,
linux-usb@vger.kernel.org, stable@vger.kernel.org
Subject: [v5] cdc-acm: fix abnormal DATA RX issue for Mediatek Preloader.
Date: Wed, 19 Dec 2018 11:16:35 +0800 [thread overview]
Message-ID: <1545189395.3262.2.camel@mtkswgap22> (raw)
On Wed, 2018-12-19 at 10:22 +0800, Macpaul Lin wrote:
> On Wed, 2018-12-19 at 01:48 +0800, Macpaul Lin wrote:
> > On Tue, 2018-12-18 at 23:42 +0700, Lars Melin wrote:
> > > On 12/18/2018 22:19, Macpaul Lin wrote:
> > >
> > >
> > > > Hi all,
> > > >
> > > > After double check the PID/VID officially used (registered) by Mediatek
> > > > Inc. The following VID/PID maps to the corresponding USB interface of
> > > > the firmware of cell phone.
> > > > VID:0x0e8d, PID:0x0003: Mediatek BROM.
> > > > VID:0x0e8d, PID:0x2000: Mediatek Preloader.
> > > >
> > > > I will update Patch v6 for changing Andrey's previous comments.
> > > >
> > >
> > > You should show us a verbose lsusb of your 0e8d:0003 before changing
> > > Andrey's submission.
> > >
> > >
> > > Season's Greeting
> > > Lars
> >
Hi Lars,
Sorry I just missed your explain about the UNION descriptor and did not
found in my mail box.
Here comes the verbose lsusb -v dump.
Bus 001 Device 003: ID 0e8d:0003 MediaTek Inc. MT6227 phone
[432/3160]
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0e8d MediaTek Inc.
idProduct 0x0003 MT6227 phone
bcdDevice 1.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 1 (error)
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x0f
connection notifications
sends break
line coding and serial state
get/set/clear comm features
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Call Management:
bmCapabilities 0x03
call management
use DataInterface
bDataInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 2 (error)
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Status: 0x7410
(Bus Powered)
Bus 001 Device 002: ID 0e8d:2000 MediaTek Inc. MT65xx Preloader
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0e8d MediaTek Inc.
idProduct 0x2000 MT65xx Preloader
bcdDevice 1.00
iManufacturer 1 (error)
iProduct 2 (error)
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 70
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 3 (error)
bmAttributes 0xc0
Self Powered
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 4 (error)
Endpoint Descriptor:
bLength 8
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 8
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 5 (error)
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x0f
connection notifications
sends break
line coding and serial state
get/set/clear comm features
CDC Union:
bMasterInterface 1
bSlaveInterface 0
CDC Call Management:
bmCapabilities 0x03
call management
use DataInterface
bDataInterface 0
Endpoint Descriptor:
bLength 8
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 16
Device Status: 0x13f0
(Bus Powered)
Debug Mode
Regards,
Macpaul Lin
next reply other threads:[~2018-12-19 3:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-19 3:16 macpaul.lin [this message]
-- strict thread matches above, loose matches on Subject: below --
2018-12-20 15:19 [v5] cdc-acm: fix abnormal DATA RX issue for Mediatek Preloader Greg Kroah-Hartman
2018-12-19 8:56 Oliver Neukum
2018-12-19 4:03 macpaul.lin
2018-12-19 3:31 Lars Melin
2018-12-19 2:22 macpaul.lin
2018-12-19 0:45 Lars Melin
2018-12-18 17:48 macpaul.lin
2018-12-18 16:42 Lars Melin
2018-12-18 15:19 macpaul.lin
2018-12-18 14:26 macpaul.lin
2018-12-18 13:37 Oliver Neukum
2018-12-18 12:38 Johan Hovold
2018-12-18 11:59 macpaul.lin
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