Note from:
http://tech.groups.yahoo.com/group/ts-7000/message/11897
========================================================================

Please note the OABI object file is typically used when building TS-7xxx
kernels for Linux other than the TS-7800. The EABI object file is
typically used for compiling TS-7800 kernels, and the PECOFF object file
is typically used for WinCE. Also as promised a patch to the Makefile is
below to build a SD card driver for the TS-7800.

eddie@io:7800_kernel_patched$ diff -u
/home/eddie/7800_kernel/drivers/mmc/Makefile drivers/mmc/Makefile
--- /home/eddie/7800_kernel/drivers/mmc/Makefile 2007-10-15
11:21:26.000000000 -0700
+++ drivers/mmc/Makefile 2008-06-26 17:15:17.000000000 -0700
@@ -29,6 +29,12 @@
# SD Card driver for TS-ARM
#
obj-$(CONFIG_TS_SDCARD) += tssdcard.o
+tssdcard-objs := sdblock.o tssdcore.o
+
+$(obj)/sdblock.o: $(obj)/tssdcard.c
+ echo "building sdblock.o"
+ $(call cmd,force_checksrc)
+ $(call if_changed_rule,cc_o_c)

mmc_core-y := mmc.o mmc_sysfs.o
mmc_core-$(CONFIG_BLOCK) += mmc_queue.o

Don't forget to also modify your TS-7800 .config file.

e.g.

eddie@io:7800_kernel_patched$ diff -u
/home/eddie/7800_kernel/arch/arm/configs/ts7800_defconfig .config
--- /home/eddie/7800_kernel/arch/arm/configs/ts7800_defconfig
2008-06-10 02:52:08.000000000 -0700
+++ .config 2008-06-26 14:15:13.000000000 -0700
@@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.21-ts
-# Thu Jun 5 19:25:24 2008
+# Thu Jun 26 14:15:13 2008
#
CONFIG_ARM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
@@ -1373,7 +1373,7 @@
#
# MMC/SD Card support
#
-# CONFIG_TS_SDCARD is not set
+CONFIG_TS_SDCARD=m
# CONFIG_MMC is not set

#

As well as the default TS-7800 block driver to include the header file.

e.g.

eddie@io:7800_kernel_patched$ diff -u
/home/eddie/7800_kernel/drivers/mmc/tssdcard.c drivers/mmc/tssdcard.c
--- /home/eddie/7800_kernel/drivers/mmc/tssdcard.c 2008-06-06
10:26:17.000000000 -0700
+++ drivers/mmc/tssdcard.c 2008-06-26 13:50:21.000000000 -0700
@@ -61,9 +61,9 @@

#ifdef CONFIG_MACH_TS72XX
#ifdef CONFIG_MACH_TS7350
-#include "tssdcore2.c"
+#include "sdcore.h"
#else
-#include "tssdcore.c"
+#include "sdcore.h"
#endif

#define DMA_ENABLE 1
@@ -123,7 +123,7 @@


#ifdef CONFIG_TS7800_PLATFORM
-#include "tssdcore2.c"
+#include "sdcore.h"

#define DMA_ENABLE 1
#define THREAD_ENABLE 1

And finally don't forget to download the
library(ftp://ftp.embeddedarm.com/ts-arm-sbc/ts-7800-linux/binaries/ts-modules/s\
dcore/EABI/tssdcore2.o)
and the header
file(ftp://ftp.embeddedarm.com/ts-arm-sbc/ts-7800-linux/binaries/ts-modules/sdco\
re/sdcore.h)
and put them in drivers/mmc/.