linux-kernel - Re: [PATCH v3] USB: serial: option: add id for Motorola Solutions TETRA PEI

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Date:   Fri, 12 Jan 2018 18:19:02 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Max Schulze <max.schulze@...teo.de>
Cc:     johan@...nel.org, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] USB: serial: option: add id for Motorola Solutions
 TETRA PEI

On Fri, Jan 12, 2018 at 10:29:54AM +0100, Max Schulze wrote:
> Add Motorola Device ID and blacklist entry to the driver usb/serial/option
> 
> The device responds with URB status: Broken pipe (-EPIPE) (-32)
> to URB setup requests for setting dtr/rts.

This indicates that option isn't the right driver for this for device.

I think we should add a new simple driver for it instead, which reports
that modem control isn't (yet) supported (yes, your python script would
need to be updated). This can be extended into a "real" driver, should
we learn more about the protocol used.

Please give the below patch a try.

> So blacklisting to avoid the usb_wwan_send_setup in usb_wwan_dtr_rts of usb_wwan.
> Tested now to work with miniterm.py and minicom without errors.
> 
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
> P:  Vendor=0cad ProdID=9011 Rev=24.16
> S:  Manufacturer=Motorola Solutions Inc.
> S:  Product=Motorola Solutions TETRA PEI interface
> C:  #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
> I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
> I:  If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
> 
> 
> Signed-off-by: Max Schulze <max.schulze@...teo.de>

Even if this is a trivial patch, you clearly based it on the patch I
sent you and this is something that should at least have been mentioned
in the commit message. Something to keep in mind for future submissions.

Thanks,
Johan


>>From a7ab87acf85b67303e7bf606734176a365aae9cd Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@...nel.org>
Date: Fri, 12 Jan 2018 17:53:35 +0100
Subject: [PATCH] USB: serial: simple: add Motorola Tetra driver

Add new Motorola Tetra (simple) driver for Motorola Solutions TETRA PEI
devices.

D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0cad ProdID=9011 Rev=24.16
S:  Manufacturer=Motorola Solutions Inc.
S:  Product=Motorola Solutions TETRA PEI interface
C:  #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I:  If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

Note that these devices do not support the CDC SET_CONTROL_LINE_STATE
request (for any interface).

Reported-by: Max Schulze <max.schulze@...teo.de>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/usb/serial/Kconfig             | 1 +
 drivers/usb/serial/usb-serial-simple.c | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index a8d5f2e4878d..c66b93664d54 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -63,6 +63,7 @@ config USB_SERIAL_SIMPLE
 		- Google USB serial devices
 		- HP4x calculators
 		- a number of Motorola phones
+		- Motorola Tetra devices
 		- Novatel Wireless GPS receivers
 		- Siemens USB/MPI adapter.
 		- ViVOtech ViVOpay USB device.
diff --git a/drivers/usb/serial/usb-serial-simple.c b/drivers/usb/serial/usb-serial-simple.c
index 74172fe158df..4ef79e29cb26 100644
--- a/drivers/usb/serial/usb-serial-simple.c
+++ b/drivers/usb/serial/usb-serial-simple.c
@@ -77,6 +77,11 @@ DEVICE(vivopay, VIVOPAY_IDS);
 	{ USB_DEVICE(0x22b8, 0x2c64) }	/* Motorola V950 phone */
 DEVICE(moto_modem, MOTO_IDS);
 
+/* Motorola Tetra driver */
+#define MOTOROLA_TETRA_IDS()			\
+	{ USB_DEVICE(0x0cad, 0x9011) }	/* Motorola Solutions TETRA PEI */
+DEVICE(motorola_tetra, MOTOROLA_TETRA_IDS);
+
 /* Novatel Wireless GPS driver */
 #define NOVATEL_IDS()			\
 	{ USB_DEVICE(0x09d7, 0x0100) }	/* NovAtel FlexPack GPS */
@@ -107,6 +112,7 @@ static struct usb_serial_driver * const serial_drivers[] = {
 	&google_device,
 	&vivopay_device,
 	&moto_modem_device,
+	&motorola_tetra_device,
 	&novatel_gps_device,
 	&hp4x_device,
 	&suunto_device,
@@ -122,6 +128,7 @@ static const struct usb_device_id id_table[] = {
 	GOOGLE_IDS(),
 	VIVOPAY_IDS(),
 	MOTO_IDS(),
+	MOTOROLA_TETRA_IDS(),
 	NOVATEL_IDS(),
 	HP4X_IDS(),
 	SUUNTO_IDS(),
-- 
2.15.1