Create a new driver for Atmel at91/avr MCI adapters that uses the u-boot mmc framework.

To use it on your platform add defines like these:

#define CONFIG_MMC                      1
#define CONFIG_GENERIC_MMC              1
#define CONFIG_GENERIC_ATMEL_MCI        1

/*change this for your cpu */
#define MMCI_BASE 0xFFF80000

Then create an init routine in your platform code:
/* this is a weak define that we are overriding */ int board_mmc_init(bd_t *bd)

{
	/* This calls your code to clock the interface
	 *  and set the pins up, etc.
	 */
        mmc_hw_init();
	/* This calls the atmel_mmc_init in gen_atmel_mci.c */
        return atmel_mmc_init(bd);
}

---
 drivers/mmc/Makefile        |    1 +
 drivers/mmc/gen_atmel_mci.c |  330 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 331 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mmc/gen_atmel_mci.c

index 6fa04b8..1785253 100644
@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
 LIB	:= $(obj)libmmc.a
 
 COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
+COBJS-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
 COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o
 COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o
 COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o

1.6.3.3

<snip>

Dear Rob Emanuele,

this patch applies to current TOT, however it does not work flawlessly:

TOP9000> fatls mmc 0:1
gen_atmel_mci: CMDR 0x00001050 (16) ARGR 0x00000000 (SR: 0x00000000) COMMAND Dbg
Msg
gen_atmel_mci: CMDR 0x00051051 (17) ARGR 0x00000000 (SR: 0x00000000) COMMAND Dbg
Msg

*** system hangs here ***

But, if preceeded by a mmc read command it works (except for some odd clock related messages):

TOP9000> mmc read 0 21000000 0 1

MMC read: dev # 0, block # 0, count 1 ... mmc: setting clock 150000 Hz, block size 512
mmc: clock 150000 too low; setting CLKDIV to 255
mmc: setting clock 0 Hz, block size 512
mmc: clock 0 too low; setting CLKDIV to 255
mmc: setting clock 194000 Hz, block size 512
gen_atmel_mci: CMDR 0x00001048 ( 8) ARGR 0x000001aa (SR: 0x0010c0e5) COMMAND Failed
mmc: setting clock 194000 Hz, block size 512
mmc: setting clock 25000000 Hz, block size 512
1 blocks read: OK
TOP9000> fatls mmc 0:1

    28521   blaue berge.jpg

1 file(s), 0 dir(s)

Which hardware(CPU) did you test it, and which u-boot version?

Best Regards,
Reinhard Meyer

Ok, the problem is that fatls does not call any init functions, its first call is a read...

I added a check for initialized so read will fail if MCI has not been initialized.

The command "mmcinfo" does the initialisation.

TOP9000> fatls mmc 0:1
MCI not initialized!
** Can't read from device 0 **

** Unable to use mmc 0:1 for fatls ** TOP9000> mmci
mmc: setting clock 150000 Hz, block size 512
mmc: clock 150000 too low; setting CLKDIV to 255
mmc: setting clock 0 Hz, block size 512
mmc: clock 0 too low; setting CLKDIV to 255
mmc: setting clock 194000 Hz, block size 512
mmc: setting clock 194000 Hz, block size 512
mmc: setting clock 25000000 Hz, block size 512
Device: Atmel MCI
Manufacturer ID: 89
OEM: 303
Name: NCard
Tran Speed: 25000000
Rd Block Len: 512
SD version 2.0
High Capacity: No
Capacity: 2006974464
Bus Width: 4-bit
TOP9000> fatls mmc 0:1
windows/
programme/

0 file(s), 2 dir(s)

I'll rework this driver to use struct SoC access and present it as a patch soon.

Reinhard