Supported microSD cards/SD-C02G - Revision history

Glenn: catchg

2009-07-18T17:01:50Z

catchg

Jc: Added andy-tracking wifi not binding on start info

2009-02-25T12:55:44Z

Added andy-tracking wifi not binding on start info

Wooly: did not find stable settings

2008-10-21T18:26:05Z

did not find stable settings

Wooly: card still failing sometimes

2008-10-18T12:11:47Z

card still failing sometimes

Wooly: parameters that allow reliable operation

2008-10-13T20:57:41Z

parameters that allow reliable operation

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The card works fine with the following kernel parameters here (GTA02 with GPS capacitor fix on uSD slot):

glamo_mci.sd_max_clk=10000000 glamo_mci.sd_drive=2

Lower drive strength or or higher clock speed cause unreliable behavior if the GSM modem is activated (either directly after entering the PIN, when making a call, or using GPRS):

Sep 15 14:15:20 debian-gta02 kernel: mmcblk0: error -84 sending read/write command

Sep 15 14:15:20 debian-gta02 kernel: glamo-mci glamo-mci.0: Error after cmd: 0x4304

Drive strength of 0 at glamo_mci.sd_max_clk=10000000 is pretty reliable at normal operation, but still fails sometimes when GPRS is activated.

(last verified using 2008.8 and newer daily kernel versions)

[[Category:Neo FreeRunner Hardware]]

← Older revision		Revision as of 17:01, 18 July 2009
Line 31:		Line 31:
	* Find out if it also happens in areas without GSM buzz.		* Find out if it also happens in areas without GSM buzz.

−	[[Category:~~Neo FreeRunner Hardware~~]]	+	[[Category:MicroSD]]

← Older revision		Revision as of 12:55, 25 February 2009
Line 12:		Line 12:

	(last verified using 2008.8 and newer daily kernel versions)		(last verified using 2008.8 and newer daily kernel versions)
		+
		+	Another problem with this card is that with a fairly new kernel (andy-tracking commit de8460932576502fb6bf61968a37c4d2aed2d6e2), to get wifi card properly recognized in the kernel, you have to unbind/bind the sdio bus like this:
		+
		+
		+	echo s3c2440-sdi >/sys/bus/platform/drivers/s3c2440-sdi/unbind
		+
		+	echo s3c2440-sdi >/sys/bus/platform/drivers/s3c2440-sdi/bind
		+

	Tested:		Tested:

@@ Line 1: / Line 1: @@
-'''Kingston SD-C02G''' works fine at good GSM coverage with the following kernel parameters here (GTA02 with GPS capacitor fix on uSD slot):
+'''Kingston SD-C02G''' works fine '''at good GSM coverage''' with the following kernel parameters here (GTA02 with GPS capacitor fix on uSD slot):
 glamo_mci.sd_max_clk=10000000 glamo_mci.sd_drive=2
@@ Line 9: / Line 9: @@
 Sep 15 14:15:20 debian-gta02 kernel: glamo-mci glamo-mci.0: Error after cmd: 0x4304
-Drive strength of 0 at glamo_mci.sd_max_clk=10000000 is pretty reliable at normal operation (at good GSM reception), but still fails sometimes when GPRS is activated. Drive strength of 2 still fails repeatably when using GSM in less populated area.
+Drive strength of 0 at glamo_mci.sd_max_clk=10000000 is pretty reliable at normal operation (at good GSM reception), but still fails sometimes when GPRS is activated. Drive strength of 2 still fails repeatably when using GSM in less populated area or when accessing SD card directly after entering PIN.
 (last verified using 2008.8 and newer daily kernel versions)
 TODO:
@@ Line 17: / Line 21: @@
 * Try to reproduce that GSM affects SD data lines themselves, not only the card
 * Verify that screen sometimes filling with random data when card fails is related to failing card, and not to failing glamo which in turn results in card errors.
-* See if SD idle clock = on prevents card from getting confused
+* Find out if it also happens in areas without GSM buzz.
 [[Category:Neo FreeRunner Hardware]]