linux-kernel - RE: [PATCH V5 00/10] mmc: add support for sdhci 4.0

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Date:   Wed, 22 Aug 2018 07:16:34 +0000
From:   Chunyan Zhang (张春艳) 
        <Chunyan.Zhang@...soc.com>
To:     Chunyan Zhang <zhang.lyra@...il.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH V5 00/10] mmc: add support for sdhci 4.0

On Thu, 16 Aug 2018 at 15:54, Chunyan Zhang <zhang.chunyan@...aro.org> wrote:
>
> From the SD host controller version 4.0 on, SDHCI implementation either
> is version 3 compatible or version 4 mode. This patch-set covers those
> changes which are common for SDHCI 4.0 version, regardless of whether
> they are used with SD or eMMC storage devices.
>
> This patchset also added a new sdhci driver for Spreadtrum's controller
> which supports v4.0 mode.
>
> This patchset has been tested on Spreadtrum's mobile phone, emmc can be
> initialized, mounted, read and written, with these changes for common
> sdhci framework and sdhci-sprd driver.
>
> Changes from V4:
> * Addressed Adrian's comments:
> - Enable v4 mode in __sdhci_read_caps() and sdhci_init() instead of sdhci_do_reset();
> - Move the added member 'v4_mode' to following with other bools;
> - Add more comments in the added function sdhci_config_dma();
> - Instead of enabling auto-CMD23 in init, enabled it only if receiving sbc from
>   cards and the argument is suitable for host to deal with;
> - Make the addition of the SDHCI_SPEC_4xx defines a separate patch;
> - Disable auto-CMD23 if stuff bits is set in the argument of CMD23 in sdhci_request().
>
> * For V4 mode, SDMA also can use auto-CMD23, adjusted host->flags in sdhci_setup_host().
>
> Previous patch series:
> v4: https://lkml.org/lkml/2018/7/23/269
> v3: https://lkml.org/lkml/2018/7/8/239
> v2: https://lkml.org/lkml/2018/6/14/936
> v1: https://lkml.org/lkml/2018/6/8/108
>
> Chunyan Zhang (10):
>   mmc: sdhci: Add version V4 definition
>   mmc: sdhci: Add sd host v4 mode
>   mmc: sdhci: Change SDMA address register for v4 mode
>   mmc: sdhci: Add ADMA2 64-bit addressing support for V4 mode
>   mmc: sdhci: Add 32-bit block count support for v4 mode
>   mmc: sdhci: Disable auto-CMD23 if stuff bits is set in CMD23 argument
>   mmc: sdhci: Add Auto CMD Auto Select support
>   mmc: sdhci: SDMA may use Auto-CMD23 in v4 mode
>   mmc: sdhci-sprd: Add Spreadtrum's initial host controller
>   dt-bindings: sdhci-sprd: Add bindings for the sdhci-sprd controller
>
>  .../devicetree/bindings/mmc/sdhci-sprd.txt         |  41 ++
>  drivers/mmc/host/Kconfig                           |  13 +
>  drivers/mmc/host/Makefile                          |   1 +
>  drivers/mmc/host/sdhci-sprd.c                      | 464 +++++++++++++++++++++
>  drivers/mmc/host/sdhci.c                           | 251 ++++++++---
>  drivers/mmc/host/sdhci.h                           |  22 +-
>  6 files changed, 741 insertions(+), 51 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-sprd.txt
>  create mode 100644 drivers/mmc/host/sdhci-sprd.c
>
> --
> 2.7.4
>