Libertas

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Libertas is the codename for the Marvel 88w838X series of wireless chipsets, and also refers to the firmware for them.

Hardware parts

Baseband Processor Product Selection table

Part no.	examples	b/g/a	Package option	CLK Type	Interface	Feature/Advantage
88W8305	?	b	TQFP 128pin 14x14x1.2 TBGA no option Flip chip Yes	20, 40, 44 CMOS only	CF SDIO (SPI)	TKIP (firmware) AES (hardware) WPA (firmware) Power Save
88W8381	?	b	TQFP 128pin 14x14x1.2 TBGA 132pin 8x8x1 Flip chip Yes	19.2, 20, 26, 38.4, 40, 44 COMS & Low swing sine wave	CF SDIO (SPI)	8305 + TKIP (hardware) 802.11e (QoS) 802.11i (Security) BT coex
88W8385	Gumstix	a/b/g	TQFP 128pin 14x14x1.2 TBGA 132pin 8x8x1 Flip chip Yes	19.2, 20, 26, 38.4, 40, 44 COMS & Low swing sine wave	CF SDIO (SPI) Generic SPI	8381 + a/g
88W8388	XO, Xbox360	a/b/g	TQFP No TBGA 132pin 8x8x1 Flip chip Yes	19.2, 20, 26, 38.4, 40, 44 COMS & Low swing sine wave	SDIO (SPI) USB 2.0	8385 + TCP/IP termination NAND Flash I/F Audio Codec I/F

RF transceiver Product Selection table

Part no.	examples	b/g/a	Package option	CLK Type	Feature/Advantage
88W8010	?	b/g	QFN 48pin 7x7x1 XFQFN 48pin 6x6x0.5	19.2, 20, 26, 38.4, 40, 44 CMOS	On chip 2.4GHz PA On chip Rx diversity Tx power@pin = +22dBm@11b, +16dBm@11g
88W8015	XO, Gumstix	b/g	QFN 48pin 7x7x1 XFQFN 48pin 6x6x0.5	19.2, 20, 26, 38.4, 40 COMS & Low swing sine wave	On chip 2.4GHz PA Tx power@pin = +22dBm@11b, +16dBm@11g Enhanced filtering for cellular handsets Low swing sine wave CLK-in
88W8030/8031	Xbox360 (88W8030)	a/b/g	QFN 56pin 8x8x1 XFQFN	8030 40MHz crystal 8031 19.2, 20, 26, 38.4, 40, 44 COMS	On chip 2.4GHz PA / Need ext.PA for 5GHz Tx power@pin = +22dBm@11b, +16dBm@11g, +0dBm@11a pre-Driver 8030 has internal OSC supply for BBP
88W8035/8036	?	a/b/g	QFN no XFQFN 56pin 7x7x0.5	8035 19.2, 20, 26, 38.4, 40 COMS & Low swing sine wave 8036 40MHz crystal	Need ext.PA for both 2.4GHz and 5GHz Tx power@pin = +0dBm@pre-Driver Enhanced filtering for cellular handsets 8036 has internal OSC supply for BBP Low swing sine wave CLK-in

• The OLPC XO laptop uses a 88w8388 baseband processor along with a 88w8015 rf transceiver connected via an internal USB interface.

Firmware

The Libertas firmware is separate from the XO-1's Open Firmware boot firmware.

• See How to check the OS and firmware versions.

• As of November 2008, Ricardo Carrano recommends firmware version 22.p18.

• http://dev.laptop.org/pub/firmware/libertas/RELEASE_NOTES provides differences between Libertas firmware releases.

• How to flash the Libertas firmware (Last edition: 2006-11-03)

• The XBox 360 wireless module is also based on the 88w8388 and possibly can be used with the olpc firmware.

  http://wiki.free60.org/WifiAdapter

  http://www.free60.org/wiki/Wifi_Adapter

  incompatible firmware loader

  4Mbit SPI flash

  uses 88W8030 RF chip

• There is a project to take the driver developed for the OLPC and utilized it for all of the libertas family including 88w8385 cf cards: http://projects.linuxtogo.org/projects/marvell8385/
• Linux 2.6.24 will include support for 88w8385 (compact flash + sdio) mode and 88w8686 (sdio), using the OLPC driver.

• There are still some issues regarding the openness of the firmware <trac>46</trac>
• Discussions about how to open libertas firmware [1][2]