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
| 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 |
| 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.
- 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.
