OLPC Firmware q4d26

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OLPC Firmware Release q4d26

Works on XO-1.75 C2 only.

• new embedded controller firmware 1.0.01, better protection against corruption of battery gauge,
• changed startup sound to "Beep Beep", due to SPI FLASH being filled up, <trac>12128</trac>, (operating system support is in the RPM for the firmware),
• fix to battery temperature calculation, <trac>12336</trac>,
• improved test support for SETi camera,
• new FTDI232 driver for OLPC serial adapters.

Download	q4d26.rom
Build date time	2013-01-03 22:18:03
Source revision	3511
EC version	1.0.01
CForth version	7b9cfcf1
Wireless firmware version	Libertas thinfirm 9.0.7.p2

Changes

Open Firmware

• 3510 OLPC XO-1.75 - play sound from file on boot disk, #12128, due to lack of space in SPI FLASH
• 3509 OLPC XO-1.75 XO-4 - bat-status@ gave an EC command result timeout on XO-1.75, caused by EC API version being treated as cross-platform when it should not have been. XO-4 no longer needs EC API version 4 support, so remove it.
• 3508 OLPC XO-1.75 - EC Code 1.0.01
• 3497 OLPC ARM - The SP command protocol had redundant "unlock"s that may have caused conflicts between foreground and interrupt queue polling.
• 3496 OLPC XO-1.75 XO-4 - fix DCON unfreeze glitch in "test /display", #12394, but needs review; calling screen wake and sleep from /dcon seems ugly.
• 3494 OLPC trac 12392 - Fixed hardcoded offset for security tag in manufacturing data. enable-security was failing on XO-4 due to the change in SPI FLASH size.
• 3487 Marvell WLAN driver - moved the host interrupt mask setting code earlier in the startup sequence to make newer 8787 firmware happy. Also fixed a name collision that was causing (harmless) compilation warnings.
• 3486 SETi camera driver - changed frame rate to 25 Hz to better match the 50 Hz refresh rate of the OLPC DCON, at the suggestion of the SETi FAE.
• 3485 SETi camera driver - fixed regression in which r3484 accidentally undid the effect of r3478.
• 3484 SETi camera driver - set undocumented bank 0 register 0x13 to avoid dark spots in the middle of overexposed areas.
• 3483 OLPC XO-1.75 and XO-4 - trac 12385 - add "no-1-8-v" property to external SDHCI nodes.
• 3482 OLPC XO-1.75 XO-4 - accelerometer informal tests fail second time when the formal test is used between them, fixed by closing accelerometer device after informal tests. #12365.
• 3480 OLPC - libertas, add unused eeprom dump helper
• 3478 Seti camera driver - changed register settings to match the Linux driver ones, except for register 0x111 which is currently set at the value for 30fps under low light conditions. The Linux driver changed that value in commit ddb0abd and then reverted it in commit 2b6599b.
• 3471 usbserial - FTDI232 driver for OLPC serial adapters
• 3470 Start of a driver for FTDI serial chips. Needs fleshing out.
• 3466 OLPC: Fix battery temperature calculation error

WLAN

• none

Which Firmware Do You Have?

The best method for finding out what firmware version you have on a laptop depends on whether the laptop is secured or not, and what operating state it is in.

Unsecured Laptop

Obtain the Ok prompt, the firmware version is displayed in the startup banner, thus:

 OLPC ..., ... memory installed, ..., S/N SHF7250024D
 OpenFirmware  q4d26 ...   EC Firmware Ver:...
               ^^^^^

You can also obtain the built date:

 ok .built

This is the date and time that this image of the firmware was built by the release engineer.

Secured Laptop

Power up the laptop with the ✓ (check mark) game button held down. You will be asked to Release the game keys to continue. Release the ✓ (check mark) game button and watch carefully. For a short time the startup banner will be displayed, like this:

 OLPC ..., ... memory installed, ..., S/N SHF7250024D
 OpenFirmware  q4d26 ...   EC Firmware Ver:...
               ^^^^^

Alternatively, if the laptop is already booted, go to the Sugar home view, click on the icon at the centre of the screen and select "My Settings" then "About my Computer." The firmware version is displayed there.

Alternatively, in the Terminal activity or a text console, type:

 cat /proc/device-tree/openprom/model

or

 cat /ofw/openprom/model

With certain older firmware versions, if the operating system will not start, and the laptop is secured, you will not be able to obtain the firmware version using the above methods, so our recommendation is to go ahead and upgrade anyway. The procedure is safe and will not do anything if you already have up-to-date firmware.

Installation

When installing new firmware, you must have a well-charged battery and the AC adapter plugged in. The firmware update code will not proceed otherwise. Possible error messages are:

error message	how to fix
AC not present	plug in the power cord, check the battery LED is on, then try again.
No external power	plug in the power cord, check the battery LED is on, then try again,
No battery	plug in the battery, check the latches, then try again, or try another battery,
Battery low	allow more time for the battery to charge, then try again, or try another battery.

Unsecured Laptop

This section is for unsecured laptops. Most XO-1.5 and XO-1.75 laptops are unsecured. Most developer XO laptops are unsecured. To unsecure your laptop, follow the instructions at Activation and Developer Keys.

You may install using either:

• a USB drive or SD card,
• the laptop's internal drive,
• a network.

Choose one.

Using a USB drive or SD card

• download the firmware from http://dev.laptop.org/pub/firmware/q4d26/q4d26.rom and save it to a USB drive or SD card,

• shutdown the laptop,

• check the battery is inserted and locked,

• check that the power cord is in place and the battery indicator is green,

• insert the USB drive or SD card,

• turn on the laptop, and get to the 'ok' prompt. See Ok for more detail. You should see:

ok

• if the downloaded file is on a USB drive, type:

 flash u:\q4d26.rom

• if the downloaded file is on an external SD card:

 flash sd:\boot\q4d26.rom

• wait for the laptop to reboot itself,

• remove the USB drive or SD card.

(Expert users may remove the USB drive after the message "Got firmware" ... at this stage the file has been read and closed.)

Using the laptop internal drive

An alternate method is to download the firmware file to the laptop internal drive and then install from the internal drive.

• start the laptop,

• connect to a wireless or wired network,

• start the Terminal Activity and type:

su
cd /versions/boot/current/boot/
wget http://dev.laptop.org/pub/firmware/q4d26/q4d26.rom

• shutdown the laptop,

• check the battery is inserted and locked,

• check that the power cord is in place and the battery indicator is green,

• turn on the laptop, and get to the 'ok' prompt. See Ok for more detail. You should see:

ok

• if the downloaded file is on an XO-1, type:

flash n:\boot\q4d26.rom

• if the file is on the internal SD card of an XO-1.5 or XO-1.75:

flash int:\boot\q4d26.rom

Using a network

You will need a compatible USB to ethernet adapter, or an open or WEP wireless access point, connected to the internet.

• shutdown the laptop,

• check the battery is inserted and locked,

• check that the power cord is in place and the battery indicator is green,

• turn on the laptop, and get to the 'ok' prompt. See Ok for more detail. You should see:

ok

• if using wireless, type the essid of the wireless network:

essid mynetwork

• if using a WPA wireless access point, type the WPA key for the network:

wpa passphrase

• type the flash command using the download link above, but change all slash characters so they are backwards, for example:

flash http:\\dev.laptop.org\pub\firmware\q4d26\q4d26.rom

Secured Laptop

Secured laptops can only use flash firmware that has been signed. All mass-production machines had the latest firmware at the time of manufacture.

Upgrading firmware describes how to upgrade to a newer signed firmware release.

See also

• Cheat codes for information about how game buttons control startup options.