Driver for HiFive-U MMC interface

Driver for HiFive-U MMC interface

[Andreas Schwab]

Further trying to boot git://github.com/riscv/riscv-linux#riscv-linux-4.18 on
the HiFive-U I can't seem to find the necessary bits to drive the MMC
interface.  Any pointers?

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

Driver for HiFive-U MMC interface

[Andreas Schwab]

I have now found the missing drivers and pushed the result to
git://github.com/andreas-schwab/riscv-linux#riscv-linux-4.18

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

Driver for HiFive-U MMC interface

[Palmer Dabbelt]

On Thu, 06 Sep 2018 01:19:43 PDT (-0700), schwab at suse.de wrote:
> Further trying to boot git://github.com/riscv/riscv-linux#riscv-linux-4.18 on
> the HiFive-U I can't seem to find the necessary bits to drive the MMC
> interface.  Any pointers?

Paul is probably the best bet here, as he's working through our mess of 
out-of-tree drivers.  If you want to do it yourself then you'll have to 
forward-port the SPI driver from riscv-linux-4.15 (or wip-spi), fix the bugs, 
and then port the dependent drivers.

Sorry!

Driver for HiFive-U MMC interface

[Andreas Schwab]

On Sep 18 2018, Palmer Dabbelt <palmer@sifive.com> wrote:

> On Thu, 06 Sep 2018 01:19:43 PDT (-0700), schwab at suse.de wrote:
>> Further trying to boot git://github.com/riscv/riscv-linux#riscv-linux-4.18 on
>> the HiFive-U I can't seem to find the necessary bits to drive the MMC
>> interface.  Any pointers?
>
> Paul is probably the best bet here, as he's working through our mess of
> out-of-tree drivers.  If you want to do it yourself then you'll have to
> forward-port the SPI driver from riscv-linux-4.15 (or wip-spi), fix the
> bugs, and then port the dependent drivers.

At least on top of 4.17 it works pretty well (see
git://github.com/andreas-schwab/riscv-linux#riscv-4.17), but the same
drivers on top of 4.18 are very unstable.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

Driver for HiFive-U MMC interface

[Atish Patra]

On 9/19/18 12:23 AM, Andreas Schwab wrote:
> On Sep 18 2018, Palmer Dabbelt <palmer@sifive.com> wrote:
> 
>> On Thu, 06 Sep 2018 01:19:43 PDT (-0700), schwab at suse.de wrote:
>>> Further trying to boot git://github.com/riscv/riscv-linux#riscv-linux-4.18 on
>>> the HiFive-U I can't seem to find the necessary bits to drive the MMC
>>> interface.  Any pointers?
>>
>> Paul is probably the best bet here, as he's working through our mess of
>> out-of-tree drivers.  If you want to do it yourself then you'll have to
>> forward-port the SPI driver from riscv-linux-4.15 (or wip-spi), fix the
>> bugs, and then port the dependent drivers.
> 
> At least on top of 4.17 it works pretty well (see
> git://github.com/andreas-schwab/riscv-linux#riscv-4.17), but the same
> drivers on top of 4.18 are very unstable.
> 
> Andreas.
> 
There were some network and DMA32 issues in 4.18. Here is my tree on top 
of 4.19-rc2. I use this for booting Fedora Gnome Desktop as well.

https://github.com/atishp04/riscv-linux/tree/4.19_fedora_success_sep11


Regards,
Atish

Driver for HiFive-U MMC interface

[Andreas Schwab]

On Sep 19 2018, Atish Patra <atish.patra@wdc.com> wrote:

> There were some network and DMA32 issues in 4.18. Here is my tree on top
> of 4.19-rc2. I use this for booting Fedora Gnome Desktop as well.
>
> https://github.com/atishp04/riscv-linux/tree/4.19_fedora_success_sep11

Thanks, after cherry-picking the missing commits I have now a 4.19-rc4
kernel that looks stable.

git://github.com/andreas-schwab/linux#riscv-4.19-rc4

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."