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SubjectRe: [PATCH] USB: serial: simple: add sierra wireless xm1210 gnss receiver
On Wed, Oct 27, 2021 at 04:02:23PM -0400, ferlandm@amotus.ca wrote:
> From: Marc Ferland <ferlandm@amotus.ca>
>
> Add device id for the Sierra Wireless XM1210 Multi-GNSS module.
>
> https://www.sierrawireless.com/iot-solutions/products/xm1210/
>
> $ lsusb -vd 1199:b000
>
> Bus 002 Device 003: ID 1199:b000 Sierra Wireless, Inc. Sierra Wireless_GNSS
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 1.00
> bDeviceClass 0
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 64
> idVendor 0x1199 Sierra Wireless, Inc.
> idProduct 0xb000
> bcdDevice 0.01
> iManufacturer 1 Sierra-wireless
> iProduct 2 Sierra Wireless_GNSS
> iSerial 0
> bNumConfigurations 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 0x0020
> bNumInterfaces 1
> bConfigurationValue 1
> iConfiguration 0
> bmAttributes 0xc0
> Self Powered
> MaxPower 50mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 0
> bInterfaceSubClass 0
> bInterfaceProtocol 0
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 255
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 255
> can't get debug descriptor: Resource temporarily unavailable
> Device Status: 0x0001
> Self Powered
>
> Device is also working correctly with:
>
> $ echo 0x1199 0xb000 > /sys/bus/usb-serial/drivers/generic/new_id
>
> Signed-off-by: Marc Ferland <ferlandm@amotus.ca>

Sorry about the late reply on this.

I've been meaning to look into adding USB support to the GNSS subsystem
and using that instead of USB serial, but I've been really short on time
lately.

The GNSS subsystem provides a generic interface to user-space regardless
of the type of interface used (e.g. serial, i2c, spi, USB) and can be
extended with GNSS specific features (e.g. power control signals) as
needed.

I've written a small generic driver for GNSS receivers with a USB
interface which I've verified using a u-blox receiver:

https://lore.kernel.org/r/20211220111901.23206-1-johan@kernel.org

Would you mind giving it a spin with the Sierra device as well?

Johan

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