[U-Boot] [PATCH v2 10/26] mmc: refactor SD startup to make it easier to support new modes

[Jonathan Gray]

On Thu, Sep 21, 2017 at 04:29:57PM +0200, Jean-Jacques Hiblot wrote:
> The SDcard startup process currently handles only 2 modes. To make it
> easier to add support for more modes, let's make the process more generic
> and use a list of the modes to try.
> The major functional change is that when a mode fails we try the next one.
> Not all modes are tried, only those supported by the card and the host.
> 
> Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

This change broke mmc with the vexpress_ca15_tc2 target and
qemu-system-arm -M vexpress-a15.

commit d0c221fe7336fc7d9ada57d96f4a8911a3aac041
Author:     Jean-Jacques Hiblot <jjhiblot at ti.com>
AuthorDate: Thu Sep 21 16:29:57 2017 +0200
Commit:     Jaehoon Chung <jh80.chung at samsung.com>
CommitDate: Fri Jan 12 18:11:04 2018 +0900

    mmc: refactor SD startup to make it easier to support new modes
    
    The SDcard startup process currently handles only 2 modes. To make it
    easier to add support for more modes, let's make the process more generic
    and use a list of the modes to try.
    The major functional change is that when a mode fails we try the next one.
    Not all modes are tried, only those supported by the card and the host.
    
    Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
    Reviewed-by: Simon Glass <sjg at chromium.org>

with a build from master e24bd1e79e223aa89854c0be95a53e2d538144a5

U-Boot 2018.03-rc1-00185-g1e19c70639 (Feb 09 2018 - 11:31:54 +1300)

DRAM:  1 GiB
WARNING: Caches not enabled
Flash: 128 MiB
MMC:   MMC: 0
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   smc911x-0
Hit any key to stop autoboot:  0
=> load mmc 0:1 ${ramdisk_addr} fdt.dtb
unable to select a mode
mmc_init: -524, time 23
unable to select a mode
mmc_init: -524, time 22
** Bad device mmc 0 **
=> load mmc 0:1 ${loadaddr} efi/boot/bootarm.efi
unable to select a mode
mmc_init: -524, time 21
unable to select a mode
mmc_init: -524, time 21
** Bad device mmc 0 **
=> bootefi ${loadaddr} ${ramdisk_addr}
## Starting EFI application at a0008000 ...
WARNING: using memory device/image path, this may confuse some payloads!
Scanning disks on mmc...
unable to select a mode
mmc_init: -524, time 21
MMC Device 1 not found
MMC Device 2 not found
MMC Device 3 not found
Found 0 disks
WARNING: Invalid device tree, expect boot to fail
efi_load_pe: Invalid DOS Signature