Jkx@home » fonera http://www.larsen-b.com Titanium Exposé Wed, 20 May 2026 16:33:52 +0000 en-US hourly 1 http://wordpress.org/?v=3.5 Fonera SD Card Hack http://www.larsen-b.com/Article/262.html http://www.larsen-b.com/Article/262.html#comments Fri, 18 May 2007 17:22:33 +0000 admin Continue reading →]]> I read on several websites, that some people managed to wire a SD Card (or a MMC) to a Fonera access point. After a little googling, I discover this can be done easily, so I decided to test.. but I run into one issue so I decided to describe the process here.

Here the finished result:

http://jkx.larsen-b.com/photos/Electronic/DSC02577.sized.jpg

Let’s give it a try:

Solder the SD Card

The first step, is to locate the SW pins (near the antenna).. simply solder some wires like this:

SD Car      -----    Fonera
DO  (pin 7)          SW1
CLK (pin 5)          SW2
DI  (pin 2)          SW5
CS  (pin 1)          SW6
Gnd (pin 3)          Gnd
Vcc (pin 4)          Vcc

Here you can see the SD Card pinouts

http://jkx.larsen-b.com/photos/Electronic/DSC02584_2.sized.jpg

You can solder the VCC, and Gnd on the serial pins.

Unsolder the Caps

In my first tests, I discovered the SD card is detected, so I checked the signals. And discover the clk isn’t really clear.. So I decided to remove the capacitor on the SPI bus. (C142, C143, C144, C145)

http://jkx.larsen-b.com/photos/Electronic/DSC02582.sized.jpg

Install software and test

Next we need to install the kernel module on OpenWRT. You can find it on the Phrozen website . Simply ipkg install the file and it should be ok. Now, let’s try: insert a SD Card, and reboot, you should see something like this in your log.

Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : MMC Driver for Fonera Version 2.5 (050507) -- '2B|!2B' (john@phrozen.org)
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : Card Found
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : card in op mode
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : SIZE : 241, nMUL : 6, COUNT : 1932, NAME : 256MB
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : Card Initialised
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : The inserted card has a capacity of 253231104 Bytes
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : adding disk
Jan  1 00:00:49 OpenWrt user.info kernel:  mmc1
Jan  1 00:00:49 OpenWrt user.warn kernel: mmc : Card was Found

So now you can mount it:

mount /dev/mmc0 /mnt

This stuff, is working really well, I managed to have around 150Ko/s (reading) which is far enough for my needs. The only issue right now, is that you need to carefully umount the card before removing it, otherwise the fonera will crash.

Enjoy Fonera ??

]]> http://www.larsen-b.com/Article/262.html/feed 39 Fonera motherboard pics, and more http://www.larsen-b.com/Article/251.html http://www.larsen-b.com/Article/251.html#comments Sun, 07 Jan 2007 21:41:10 +0000 admin Continue reading →]]> Here some photos (hi-res) of the Fonera, the Fon routeur. This little box has:

  • 8Mo
  • Atheros CPU + Wifi

Here you can see the AR2315 CPU from Atheros. One stuff really funny, they decide to use exactly the same layout as the Atheros design (look at the pic closely). You can see the 16Mb Ram on the left. Just near the serial port, and the 14 pins header is a JTag. We can see the antenna, the network plug, and the power supply on the left.

You can find hi-res pics here

http://jkx.larsen-b.com/photos/Electronic/DSC02545.sized.jpg

Here, you can the 8Mo serial flash made by ST. And the Altima network chip.

http://jkx.larsen-b.com/photos/Electronic/DSC02547.sized.jpg

This looks like a great hardware to hack… some, and have a OpenWRT port. But it seems to have a really limited free GPIO and the BGA package doesn’t help :(

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