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[edk2,v2,0/2] quirks handling for SDHCI controllers

Message ID 20171130101132.18317-1-ard.biesheuvel@linaro.org
Headers show
Series quirks handling for SDHCI controllers | expand

Message

Ard Biesheuvel Nov. 30, 2017, 10:11 a.m. UTC 
Many SDHCI implementations exist that are almost spec complicant, and
could be driven by the generic SD/MMC host controller driver except
for some minimal necessary init time tweaks.

Adding such tweaks to the generic driver is undesirable. On the other
hand, forking the driver for every platform that has such a SDHCI
controller is problematic when it comes to upstreaming and ongoing
maintenance (which is arguably the point of upstreaming in the first
place).

So these patches propose a workaround that is minimally invasive on the
EDK2 side, but gives platforms a lot of leeway when it comes to applying
SDHCI quirks.

Changes since RFC/v1:
- add EFI_SD_MMC_PASS_THRU_PROTOCOL* member to override methods
- use UINT64* not VOID* to pass capability structure (which is alwys 64 bits
  in size)

Ard Biesheuvel (2):
  MdeModulePkg: introduce SD/MMC override protocol
  MdeModulePkg/SdMmcPciHcDxe: allow HC capabilities to be overridden

 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c   | 116 +++++++++++++++++++-
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h   |   6 +
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.inf |   2 +
 MdeModulePkg/Include/Protocol/SdMmcOverride.h        | 103 +++++++++++++++++
 MdeModulePkg/MdeModulePkg.dec                        |   3 +
 5 files changed, 225 insertions(+), 5 deletions(-)
 create mode 100644 MdeModulePkg/Include/Protocol/SdMmcOverride.h

-- 
2.11.0

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Comments

Ard Biesheuvel Dec. 4, 2017, 2:53 p.m. UTC | #1 
On 30 November 2017 at 10:11, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> Many SDHCI implementations exist that are almost spec complicant, and

> could be driven by the generic SD/MMC host controller driver except

> for some minimal necessary init time tweaks.

>

> Adding such tweaks to the generic driver is undesirable. On the other

> hand, forking the driver for every platform that has such a SDHCI

> controller is problematic when it comes to upstreaming and ongoing

> maintenance (which is arguably the point of upstreaming in the first

> place).

>

> So these patches propose a workaround that is minimally invasive on the

> EDK2 side, but gives platforms a lot of leeway when it comes to applying

> SDHCI quirks.

>

> Changes since RFC/v1:

> - add EFI_SD_MMC_PASS_THRU_PROTOCOL* member to override methods

> - use UINT64* not VOID* to pass capability structure (which is alwys 64 bits

>   in size)

>

> Ard Biesheuvel (2):

>   MdeModulePkg: introduce SD/MMC override protocol

>   MdeModulePkg/SdMmcPciHcDxe: allow HC capabilities to be overridden

>


Hao, Star,

Any comments?

Thanks,
Ard.
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Zeng, Star Dec. 5, 2017, 2:08 a.m. UTC | #2 
Include Ruiyu and Mike.


Thanks,
Star
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Ard Biesheuvel

Sent: Monday, December 4, 2017 10:53 PM
To: edk2-devel@lists.01.org
Cc: Wu, Hao A <hao.a.wu@intel.com>; Tian, Feng <feng.tian@intel.com>; Zeng, Star <star.zeng@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>; Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [edk2] [PATCH v2 0/2] quirks handling for SDHCI controllers

On 30 November 2017 at 10:11, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> Many SDHCI implementations exist that are almost spec complicant, and 

> could be driven by the generic SD/MMC host controller driver except 

> for some minimal necessary init time tweaks.

>

> Adding such tweaks to the generic driver is undesirable. On the other 

> hand, forking the driver for every platform that has such a SDHCI 

> controller is problematic when it comes to upstreaming and ongoing 

> maintenance (which is arguably the point of upstreaming in the first 

> place).

>

> So these patches propose a workaround that is minimally invasive on 

> the

> EDK2 side, but gives platforms a lot of leeway when it comes to 

> applying SDHCI quirks.

>

> Changes since RFC/v1:

> - add EFI_SD_MMC_PASS_THRU_PROTOCOL* member to override methods

> - use UINT64* not VOID* to pass capability structure (which is alwys 64 bits

>   in size)

>

> Ard Biesheuvel (2):

>   MdeModulePkg: introduce SD/MMC override protocol

>   MdeModulePkg/SdMmcPciHcDxe: allow HC capabilities to be overridden

>


Hao, Star,

Any comments?

Thanks,
Ard.
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