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

["Alim Akhtar" <alim.akhtar@samsung.com>]

Hello Pawel
Thanks for helping in testing.

> -----Original Message-----
> From: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
> Sent: 20 March 2020 01:12
> To: Alim Akhtar <alim.akhtar@samsung.com>
> Cc: krzk@kernel.org; avri.altman@wdc.com; martin.petersen@oracle.com;
> kwmad.kim@samsung.com; stanley.chu@mediatek.com;
> cang@codeaurora.org; linux-samsung-soc@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org; robh+dt@kernel.org;
> devicetree@vger.kernel.org; linux-scsi@vger.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).
> 
Exynos7 and Exynos7420 are compatible and belong to same Exynos SoC series (but there are some fine differences)

> 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).
> 
I think this should work on S6 Edge, but not entirely sure, as I am not aware of the S6 H/W schematic, specially PMIC connection.

> 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?
> 
To me, It looks like UFS device is not powered ON or properly Reseted, I have seen this kind of issues in past and 
AFAIR, fix was to keep the PMIC rail which was hook to device RESET_N always-on.

> 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
> >