linux-kernel - Re: [PATCH v3 0/5] exynos-ufs: Add support for UFS HCI

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Date:   Thu, 19 Mar 2020 20:42:19 +0100
From:   Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
To:     Alim Akhtar <alim.akhtar@...sung.com>
Cc:     krzk@...nel.org, avri.altman@....com, martin.petersen@...cle.com,
        kwmad.kim@...sung.com, stanley.chu@...iatek.com,
        cang@...eaurora.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org,
        linux-scsi@...r.kernel.org
Subject: Re: [PATCH v3 0/5] exynos-ufs: Add support for UFS HCI

On Thu, 2020-03-19 at 20:30 +0530, Alim Akhtar wrote:
> This patch-set introduces UFS (Universal Flash Storage) host controller support
> for Samsung family SoC. Mostly, it consists of UFS PHY and host specific driver.
> 
> - Changes since v2:
> * fixed build warning by kbuild test robot 
> * Added Reported-by tags
> 
> - Changes since v1:
> * fixed make dt_binding_check error as pointed by Rob
> * Addressed Krzysztof's review comments
> * Added Reviewed-by tags
> 
>  
> patch 1/5: define devicetree bindings for UFS PHY
> patch 2/5: Adds UFS PHY driver
> patch 3/5: define devicetree bindings for UFS HCI 
> patch 4/5: Adds Samsung UFS HCI driver
> patch 5/5: Enabled UFS on exynos7 platform
Hi
Is this compatible with Exynos7420? Looking at u-boot source code,
there is Espresso7420 - isn't it the same device? Also this driver
looks very similar to the one from vendor kernel sources (for my
device). 

I did tried to run this on my Exynos7420 based device (Samsung S6 Edge
phone) with 5.6-rc6, to get any storage working (since it doesn't have sdcard slot).

At first i got error in exynos_ufs_config_smu. Looking at vendor
sources, on my device only secureos is able to write to those registers
so i fixed it by using smc calls and driver probes fine. Will this be
also supported by driver (maybe in future)?

But now got another error
[    1.610464] exynos-ufshc 15570000.ufs: ufshcd_intr: Unhandled
interrupt 0x00000000
[    1.610629] host_regs: 00000000: 0383ff0f 00000000 00000200 00000000
[    1.610747] host_regs: 00000010: 00000101 00007fce 00000000 00000000
[    1.610863] host_regs: 00000020: 00000000 00030e75 00000000 00000000
[    1.614727] host_regs: 00000030: 0000000f 00000000 00000000 00000000
[    1.621061] host_regs: 00000040: 00000000 00000000 00000000 00000000
[    1.627396] host_regs: 00000050: f8c37000 00000000 00000001 00000000
[    1.633730] host_regs: 00000060: 00000001 00000000 00000000 00000000
[    1.640065] host_regs: 00000070: f9644000 00000000 00000000 00000000
[    1.646400] host_regs: 00000080: 00000001 00000000 00000000 00000000
[    1.652734] host_regs: 00000090: 00000002 95290000 00000000 00000000
[    1.747649] exynos-ufshc 15570000.ufs: ufshcd_intr: Unhandled
interrupt 0x00000000
[    1.747807] host_regs: 00000000: 0383ff0f 00000000 00000200 00000000
[    1.747924] host_regs: 00000010: 00000101 00007fce 00000000 00000000
[    1.748041] host_regs: 00000020: 00000000 00030e75 00000000 00000000
[    1.751909] host_regs: 00000030: 0000000f 00000000 00000000 00000000
[    1.758244] host_regs: 00000040: 00000000 00000000 00000000 00000000
[    1.764578] host_regs: 00000050: f8c37000 00000000 00000001 00000000
[    1.770913] host_regs: 00000060: 00000001 00000000 00000000 00000000
[    1.777248] host_regs: 00000070: f9644000 00000000 00000000 00000000
[    1.783582] host_regs: 00000080: 00000001 00000000 00000000 00000000
[    1.789917] host_regs: 00000090: 00000002 95290000 00000000 00000000
[    1.884841] exynos-ufshc 15570000.ufs: ufshcd_intr: Unhandled
interrupt 0x00000000
[    1.884999] host_regs: 00000000: 0383ff0f 00000000 00000200 00000000
[    1.885116] host_regs: 00000010: 00000101 00007fce 00000000 00000000
[    1.885233] host_regs: 00000020: 00000000 00030e75 00000000 00000000
[    1.889100] host_regs: 00000030: 0000000f 00000000 00000000 00000000
[    1.895435] host_regs: 00000040: 00000000 00000000 00000000 00000000
[    1.901770] host_regs: 00000050: f8c37000 00000000 00000001 00000000
[    1.908104] host_regs: 00000060: 00000001 00000000 00000000 00000000
[    1.914439] host_regs: 00000070: f9644000 00000000 00000000 00000000
[    1.920773] host_regs: 00000080: 00000001 00000000 00000000 00000000
[    1.927108] host_regs: 00000090: 00000002 95290000 00000000 00000000
[    2.998155] exynos-ufshc 15570000.ufs: ufshcd_query_flag: Sending
flag query for idn 1 failed, err = -11
[    4.502138] exynos-ufshc 15570000.ufs: ufshcd_query_flag: Sending
flag query for idn 1 failed, err = -11
[    6.006137] exynos-ufshc 15570000.ufs: ufshcd_query_flag: Sending
flag query for idn 1 failed, err = -11
[    6.006311] exynos-ufshc 15570000.ufs: ufshcd_query_flag_retry:
query attribute, opcode 5, idn 1, failed with error -11 after 3 retires
[    6.006545] exynos-ufshc 15570000.ufs: ufshcd_complete_dev_init
reading fDeviceInit flag failed with error -11

Do You have any idea what could be wrong?

Thanks
> 
> Note: This series is based on Linux-5.6-rc6 (commit: fb33c6510d55)
> 
> 
> Alim Akhtar (5):
>   dt-bindings: phy: Document Samsung UFS PHY bindings
>   phy: samsung-ufs: add UFS PHY driver for samsung SoC
>   Documentation: devicetree: ufs: Add DT bindings for exynos UFS host
>     controller
>   scsi: ufs-exynos: add UFS host support for Exynos SoCs
>   arm64: dts: Add node for ufs exynos7
> 
>  .../bindings/phy/samsung,ufs-phy.yaml         |   62 +
>  .../devicetree/bindings/ufs/ufs-exynos.txt    |  104 ++
>  .../boot/dts/exynos/exynos7-espresso.dts      |   16 +
>  arch/arm64/boot/dts/exynos/exynos7.dtsi       |   44 +-
>  drivers/phy/samsung/Kconfig                   |    9 +
>  drivers/phy/samsung/Makefile                  |    1 +
>  drivers/phy/samsung/phy-exynos7-ufs.h         |   85 +
>  drivers/phy/samsung/phy-samsung-ufs.c         |  311 ++++
>  drivers/phy/samsung/phy-samsung-ufs.h         |  100 ++
>  drivers/scsi/ufs/Kconfig                      |   12 +
>  drivers/scsi/ufs/Makefile                     |    1 +
>  drivers/scsi/ufs/ufs-exynos.c                 | 1399 +++++++++++++++++
>  drivers/scsi/ufs/ufs-exynos.h                 |  268 ++++
>  drivers/scsi/ufs/unipro.h                     |   41 +
>  include/linux/phy/phy-samsung-ufs.h           |   70 +
>  15 files changed, 2521 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/phy/samsung,ufs-phy.yaml
>  create mode 100644 Documentation/devicetree/bindings/ufs/ufs-exynos.txt
>  create mode 100644 drivers/phy/samsung/phy-exynos7-ufs.h
>  create mode 100644 drivers/phy/samsung/phy-samsung-ufs.c
>  create mode 100644 drivers/phy/samsung/phy-samsung-ufs.h
>  create mode 100644 drivers/scsi/ufs/ufs-exynos.c
>  create mode 100644 drivers/scsi/ufs/ufs-exynos.h
>  create mode 100644 include/linux/phy/phy-samsung-ufs.h
>