[U-Boot] [linux-sunxi] [PATCH 0/9] sunxi: enable DM_MMC

[Priit Laes <plaes@plaes.org>]

On Mon, Jan 21, 2019 at 12:54:52AM +0000, André Przywara wrote:
> On 20/01/2019 19:51, Priit Laes wrote:
> 
> Hi,
> 
> > On Sat, Jan 19, 2019 at 01:30:46AM +0000, Andre Przywara wrote:
> >> This series enables the Allwinner MMC driver to drive all SoCs with its
> >> DM_MMC variant. We use the gates clock and reset support from the new
> >> clock driver, but keep the actual mod clock in its somewhat hackish
> >> state. Properly supporting this via the clock driver is a bit more work.
> >> The per-compatible variant struct for now only holds the mod clock
> >> address (which will go away), but we will need the struct later again
> >> for the various timing modes.
> >>
> >> This allows us to eventually enable DM_MMC for all SoCs, and get rid of
> >> the nasty deprecation warning.
> >>
> >> The first patch adds the MMC clock gates and resets to the clock driver.
> >> Patch 2/9 adds support for the A80 MMC config clock, which is a bit
> >> special. I can't test this, so please give this a try if you have a board.
> >>
> >> Patch 3 uses the new clocks in the MMC driver, the following three patches
> >> add the remaining compatible strings along with their required mod clock
> >> addresses.
> >>
> >> Patch 7 fixes the Pine64-LTS board, while patch 8 eventually enables
> >> everything. Patch 9 is some comment fix to make it easier to reason
> >> about what part of the driver is for DM_MMC and which is not.
> >>
> >> I successfully compiled the HEAD for all 142 Allwinner boards, also
> >> compiled all patches for selected boards.
> >>
> >> This was briefly tested on Pine-H64 (H6), Pine64-LTS (A64), OrangePi PC 2
> >> (H5), OrangePi Zero (H2+) and BananaPi-M1 (A20).
> >>
> >> Please run it on every board that you can get hold of to give this series
> >> a good shake.
> > 
> > Testing with A10 Gemei G9 Tablet, FEL mode is broken:
> > 
> > a) With usb-boot via fel:
> > 
> > I get following error/warning: 
> > Loading Environment from FAT... Card did not respond to voltage select!
> > 
> > => mmc list
> > mmc at 1c0f000: 0
> > ### All commands below stalls for a bit (~2 seconds), but return nothing
> > => mmc info  
> > => mmc dev 0
> > => mmc part

Similar issue with A20 Olinuxino Lime2 revk with SPI.

a) Fel mode usb-boot failure (cannot properly initialize sd / emmc)
b) SPI boot failure (cannot properly initialize sd / emmc)

c) Regular SD-card boot works ok!
d) eMMC boot works ok!

> Ah, thanks for mentioning that. Can reproduce this on the Pine64-LTS.
> And I was already wondering why we wouldn't need the pinctrl parts I was
> working on ...
> 
> So if we boot from SD card, the SPL sets up the pinmux for the SD pins,
> and stuff works. For U-Boot proper we rely on board_mmc_init() to do
> this for us, but this gets only called for !DM_MMC configurations.
> If we boot with a SPL which doesn't initialise the MMC (booting via FEL
> or SPI or NAND), the pinmux setup is missing and it fails.
> 
> If anyone has a clever idea how to fix this without too much hacking and
> without bringing in a DM_PINCTRL driver, I am all ears.

Well, we know that there are basically only a few SPL boot options..
> 
> Thanks for testing and the report!
> 
> Cheers,
> Andre.
> 
> > 
> > b) When booting from SD-card [1], card is properly found, identified and
> > even partitions are there.
> > 
> > dd if=u-boot-sunxi-with-spl.bin of=/dev/mmcblk0 seek=8 bs=1024
> > 
> > 
> >> This goes on top of current sunxi/master (543049ab5906) and is available
> >> on https://github.com/apritzel/u-boot/commits/sunxi-dm.
> >>
> >> This replaces Jagan's v2 series "mmc: sunxi: Enable DM_MMC" in a more
> >> driver model compliant way, borrowing two patches from him.
> >>
> >> Cheers,
> >> Andre.
> >>
> >> Andre Przywara (7):
> >>   sunxi: clk: add MMC gates/resets
> >>   sunxi: clk: A80: add MMC clock support
> >>   mmc: sunxi: Add DM clk and reset support
> >>   mmc: sunxi: Add H6 support
> >>   mmc: sunxi: Add A80 support
> >>   mmc: sunxi: Honour non-removable property in DT
> >>   mmc: sunxi: Mark end of DM_MMC #ifdefs
> >>
> >> Jagan Teki (2):
> >>   mmc: sunxi: Add missing compatible strings
> >>   arm: sunxi: Enable DM_MMC
> >>
> >>  arch/arm/Kconfig                      |  1 +
> >>  arch/arm/mach-sunxi/Kconfig           |  1 -
> >>  configs/Linksprite_pcDuino3_defconfig |  1 -
> >>  drivers/clk/sunxi/clk_a10.c           |  4 +++
> >>  drivers/clk/sunxi/clk_a10s.c          |  3 ++
> >>  drivers/clk/sunxi/clk_a23.c           |  6 ++++
> >>  drivers/clk/sunxi/clk_a31.c           |  8 +++++
> >>  drivers/clk/sunxi/clk_a64.c           |  6 ++++
> >>  drivers/clk/sunxi/clk_a80.c           | 28 ++++++++++++++++-
> >>  drivers/clk/sunxi/clk_a83t.c          |  6 ++++
> >>  drivers/clk/sunxi/clk_h3.c            |  6 ++++
> >>  drivers/clk/sunxi/clk_h6.c            |  6 ++++
> >>  drivers/clk/sunxi/clk_r40.c           |  8 +++++
> >>  drivers/mmc/sunxi_mmc.c               | 59 +++++++++++++++++++++++++++++------
> >>  14 files changed, 131 insertions(+), 12 deletions(-)
> >>
> >> -- 
> >> 2.14.5
> >>
> >> -- 
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