 Mmc Soldered. Driver Almost Working |
OESF Forums > Distros, Development, and Model Specific Forums > Model Specific Forums > SIMpad forum
 Sep 6 2005, 08:45 AM
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#1
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Group: Members Posts: 577 Joined: 17-March 04 Member No.: 2,365  |
Hello
Just to let you know the MMC has been soldered into the simpad, and the driver is being developped. Currently some basic tests (like powering on and off leds from a kernel module) work fine. Attention - the picture on my website has the MMC card drawn backwards. it should read "Top view" instead of "bottom view". I'll fix the picture. Guylhem |
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Nov 4 2005, 02:12 PM
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#2
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Group: Members Posts: 535 Joined: 7-March 04 Member No.: 2,195 |
Well, I'm not Guylhem, but here's how I've compiled it inside the kernel tree - just put Guylhem's mmc.c file into linux/drivers/block directory and added the following:
"tristate 'MMC SPI driver' CONFIG_BLK_DEV_MMC" to linux/drivers/block/Config.in and "obj-$(CONFIG_BLK_DEV_MMC) += mmc.o" to linux/drivers/block/Makefile `make menuconfig` then choose "MMC SPI driver" to compile as a module. That should do it. Don't enable MMC support that exists in the latest kernels, it has nothing to do with this driver. As far as power management goes, I think Guylhem is right. The driver needs hooks to apm to properly re-init the card after loss of power. I have my card powered up all the time, so I don't have this problem, but power drain even in idle mode seems to be significant, so I'm planning to re-wire it to some controlled 3.3V domain. Removing/Reloading the driver on apm events is not an option with storage devices IMHO, since it would invalidate its mount state. I'm not sure what would happen if the card is used as a swap device/file in this case... -albertr |
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Nov 6 2005, 09:59 AM
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#3
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Group: Members Posts: 12 Joined: 29-September 05 Member No.: 8,218 |
@albertr: It works - thanks
 I have made a kernel path for actual opensimpad kernel from openembedded repository. If guylhem (or somebody else) would load it up to his webspace anybody could compile the driver and make an ipk easily by replacing the original patch before compiling the kernel. I think you're right - it's not a good idea to power down/unmount the card with an opened file. Do you know how much current your card needs during standby? Maybe I also let my card always powered on until the power management in implemented. |
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Posts in this topic
guylhem Mmc Soldered. Driver Almost Working Sep 6 2005, 08:45 AM
miip Very good work Guylhem! Sep 6 2005, 10:43 AM guylhem BTW before killing my bluetooth chip (my own fault... Sep 7 2005, 02:54 AM
laurens Does anyone know where to get those MD35 DECT modu... Sep 7 2005, 06:33 AM dhns QUOTE(laurens @ Sep 7 2005, 03:33 PM)Does any... Sep 7 2005, 07:01 AM albertr Why would one need a cable if flying leads could e... Sep 7 2005, 07:26 AM guylhem I don't know why I needed a cable - maybe to m... Sep 8 2005, 12:52 AM guylhem http://externe.net/zaurus/simpad-bluetooth/
Every... Sep 8 2005, 02:40 AM geron This is very interesting, indeed. I'm wonderin... Sep 8 2005, 03:33 AM guylhem What do you want me to run to test it ? some timed... Sep 8 2005, 05:04 AM geron How about this:
date ; dd bs=4096 count=10000 if=... Sep 8 2005, 05:40 AM albertr Thanks for clarification, but I would like to see ... Sep 8 2005, 07:06 AM guylhem root@simpad:/mnt/mmc# date ; dd bs=256k count=64 i... Sep 8 2005, 10:13 AM albertr Sounds promising.... So, you haven't experienc... Sep 8 2005, 03:20 PM albertr I've soldered a SD/MMC socket to Simpad and wa... Sep 17 2005, 02:18 PM albertr The same problem with 128MB SD card made by Sandis... Sep 17 2005, 02:31 PM niv If some1 may want to use a mmc/SD socket here is a... Oct 4 2005, 10:10 AM albertr The price for a SD/MMC socket varies from $1 ... Oct 5 2005, 08:23 AM guylhem albertr, you must reread the partition of the card... Oct 6 2005, 03:20 AM albertr Guylhem, thanks for explanation. Do you mean BLKRR... Oct 6 2005, 08:53 AM albertr Still no go...
Here's the simple code that I... Oct 6 2005, 07:29 PM guylhem Hello
It's not exactly what I use. My code is... Oct 7 2005, 12:02 PM albertr Hah! I'm a dumbass! I was using the wr... Oct 8 2005, 06:25 AM guylhem QUOTE(albertr @ Oct 8 2005, 06:25 AM)Hah... Oct 12 2005, 05:15 AM albertr I put some pictures here:
http://www.iral.com/~al... Oct 9 2005, 11:07 AM Tom61 QUOTE(albertr @ Oct 9 2005, 07:07 PM)I put so... Oct 9 2005, 03:57 PM albertr That's what dremel is capable of
-albertr Oct 9 2005, 04:44 PM albertr I'm not good in cutting thru plastic too, but ... Oct 12 2005, 05:54 AM guylhem Well that's a bit far from Europe. I'll tr... Oct 13 2005, 12:31 AM sash @Guylhem: How did you compile the kernel module?
I... Oct 25 2005, 08:32 AM guylhem Hello
I simply copy/paste a module compilation co... Oct 26 2005, 05:17 AM sash QUOTE(guylhem @ Oct 26 2005, 03:17 PM)PS: IIR... Oct 27 2005, 11:16 PM guylhem Hello
I found some nor flash chips references tha... Oct 28 2005, 05:15 AM sash At the moment I try to get my 512mb sd card to wor... Oct 29 2005, 11:09 AM fredyd Can the simpad MMC module be considered stable eno... Nov 2 2005, 06:26 AM guylhem fredyd, it's not stable enough - it needs powe... Nov 3 2005, 10:44 AM sash @Guylhem: You were right - it's a driver probl... Nov 4 2005, 01:51 PM albertr I didn't measure it yet - still didn't get... Nov 6 2005, 10:45 AM guylhem sash, I'd be happy to host the patch, but IMHO... Nov 6 2005, 12:37 PM sash QUOTE(guylhem @ Nov 6 2005, 10:37 PM)BTW, wha... Nov 10 2005, 12:55 AM fredyd Sash sent me the MMC driver, and after a few fixes... Nov 11 2005, 06:59 AM fredyd From the OE commit log:
opensimpad: MMC support +... Nov 11 2005, 07:06 AM sirtet about restarting opensimpad
see the new topic
res... Nov 10 2005, 04:03 AM guylhem Hello
I'd rather work on 2.6 than fixing 2.4
... Nov 11 2005, 07:29 AM fredyd Unfortunately, you'll have to break down the v... Nov 11 2005, 10:05 AM tommyd75 Hello,
I've been following this thread for a ... May 29 2006, 03:46 PM Tom61 QUOTE(tommyd75 @ May 29 2006, 11:46 PM)Hello,... May 30 2006, 11:37 AM Peppe Hello,
I've been following this thread for a ... Aug 23 2006, 04:40 AM |
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