Hi, Ulf Ulf Hansson <ulf.hansson@xxxxxxxxxx> 於 2022年10月19日 週三 晚上7:30寫道： > > On Wed, 19 Oct 2022 at 13:06, Victor Shih <victorshihgli@xxxxxxxxx> wrote: > > > > Summary > > ======= > > These patches[1] support UHS-II and fix GL9755 UHS-II compatibility. > > > > About UHS-II, roughly deal with the following three parts: > > 1) A UHS-II detection and initialization: > > - Host setup to support UHS-II (Section 3.13.1 Host Controller Setup Sequence > > [2]). > > - Detect a UHS-II I/F (Section 3.13.2 Card Interface Detection Sequence[2]). > > - In step(9) of Section 3.13.2 in [2], UHS-II initialization is include Section > > 3.13.3 UHS-II Card Initialization and Section 3.13.4 UHS-II Setting Register > > Setup Sequence. > > > > 2) Send Legacy SD command through SD-TRAN > > - Encapsulated SD packets are defined in SD-TRAN in order to ensure Legacy SD > > compatibility and preserve Legacy SD infrastructures (Section 7.1.1 Packet > > Types and Format Overview[3]). > > - Host issue a UHS-II CCMD packet or a UHS-II DCMD (Section 3.13.5 UHS-II > > CCMD Packet issuing and Section 3.13.6 UHS-II DCMD Packet issuing[2]). > > > > 3) UHS-II Interrupt > > - Except for UHS-II error interrupts, most interrupts share the original > > interrupt registers. > > > > Patch structure > > =============== > > patch#1-#6: for core > > patch#7-#25: for sdhci > > patch#26: for GL9755 > > > > Changes in v5 (Oct. 19, 2022) > > * rebased to the linux-kernel-v6.1-rc1 in Ulf Hansson next branch. > > Thanks for rebasing! > > Although, future wise, if you make any kind of changes to any patch in > the series, please bump the version and explain what has been changed. > This avoids confusion. > > I need some more time to have a closer look at the series, so I will > get back to you again. > > Kind regards > Uffe > I will follow your advice. When I make any kind of changes to any patch in the series, I will update the version and explain it. I have a small hope that if you already have a closer look a paragraph at the series, could you let me know your comments first, let me check it first. Thanks, Victor Shih > > > * according to the guidance and overall architecture provided > > by Ulf Hansson, Ben Chuang and Jason Lai to implement the > > UHS-2 Core function based on the patches of the [V4,0/6] > > Preparations to support SD UHS-II cards[5]. > > * according to the guidance and comments provided by > > Adrian Hunter, Ben Chuang and AKASHI Takahiro to implement > > the UHS-2 Host function based on the patches of the > > [RFC,v3.1,00/27] Add support UHS-II for GL9755[4]. > > * implement the necessary function to let the UHS-2 Core/Host > > work properly. > > * fix most of checkpatch warnings/errors > > > > Reference > > ========= > > [1] https://gitlab.com/ben.chuang/linux-uhs2-gl9755.git > > [2] SD Host Controller Simplified Specification 4.20 > > [3] UHS-II Simplified Addendum 1.02 > > [4] https://patchwork.kernel.org/project/linux-mmc/cover/20201106022726.19831-1-takahiro.akashi@xxxxxxxxxx/ > > [5] https://patchwork.kernel.org/project/linux-mmc/cover/20220418115833.10738-1-jasonlai.genesyslogic@xxxxxxxxx/ > > > > ----------------- original cover letter from v3.1 ----------------- > > This is an interim snapshot of our next version, v4, for enabling > > UHS-II on MMC/SD. > > > > It is focused on 'sdhci' side to address Adrian's comments regarding > > "modularising" sdhci-uhs2.c. > > The whole aim of this version is to get early feedback from Adrian (and > > others) on this issue. Without any consensus about the code structure, > > it would make little sense to go further ahead on sdhci side. > > (Actually, Adrian has made no comments other than "modularising" so far.) > > > > I heavily reworked/refactored sdhci-uhs2.c and re-organised the patch > > set to meet what I believe Adrian expects; no UHS-II related code in > > Legacy (UHS-I) code or sdhci.c. > > > > Nevertheless, almost of all changes I made are trivial and straightforward > > in this direction, and I believe that there is no logic changed since v3 > > except sdhci_uhs2_irq(), as ops->irq hook, where we must deal with UHS-II > > command sequences in addition to UHS-II errors. So I added extra handlings. > > > > I admit that there is plenty of room for improvements (for example, > > handling host->flags), but again the focal point here is how sdhci-uhs2.c > > should be built as a module. > > > > Please review this series (particularly Patch#8-#26 and #27) from this > > viewpoint in the first place. > > (Ben is working on 'host' side but there is no change on 'host' side > > in this submission except a minor tweak.) > > > > Thanks, > > -Takahiro Akashi > > > > ------ original cover letter from v3 ------ > > Summary > > ======= > > These patches[1] support UHS-II and fix GL9755 UHS-II compatibility. > > > > About UHS-II, roughly deal with the following three parts: > > 1) A UHS-II detection and initialization: > > - Host setup to support UHS-II (Section 3.13.1 Host Controller Setup Sequence > > [2]). > > - Detect a UHS-II I/F (Section 3.13.2 Card Interface Detection Sequence[2]). > > - In step(9) of Section 3.13.2 in [2], UHS-II initialization is include Section > > 3.13.3 UHS-II Card Initialization and Section 3.13.4 UHS-II Setting Register > > Setup Sequence. > > > > 2) Send Legacy SD command through SD-TRAN > > - Encapsulated SD packets are defined in SD-TRAN in order to ensure Legacy SD > > compatibility and preserve Legacy SD infrastructures (Section 7.1.1 Packet > > Types and Format Overview[3]). > > - Host issue a UHS-II CCMD packet or a UHS-II DCMD (Section 3.13.5 UHS-II > > CCMD Packet issuing and Section 3.13.6 UHS-II DCMD Packet issuing[2]). > > > > 3) UHS-II Interrupt > > - Except for UHS-II error interrupts, most interrupts share the original > > interrupt registers. > > > > Patch structure > > =============== > > patch#1-#7: for core > > patch#8-#17: for sdhci > > patch#18-#21: for GL9755 > > > > Tests > > ===== > > Ran 'dd' command to evaluate the performance: > > (SanDisk UHS-II card on GL9755 controller) > > Read Write > > UHS-II disabled (UHS-I): 88.3MB/s 60.7MB/s > > UHS-II enabled : 206MB/s 80MB/s > > > > TODO > > ==== > > - replace some define with BIT macro > > > > Reference > > ========= > > [1] https://gitlab.com/ben.chuang/linux-uhs2-gl9755.git > > [2] SD Host Controller Simplified Specification 4.20 > > [3] UHS-II Simplified Addendum 1.02 > > > > Changes in v3 (Jul. 10, 2020) > > * rebased to v5.8-rc4 > > * add copyright notice > > * reorganize the patch set and split some commits into smaller ones > > * separate uhs-2 headers from others > > * correct wrong spellings > > * fix most of checkpatch warnings/errors > > * remove all k[cz]alloc() from the code > > * guard sdhci-uhs2 specific code with > > 'if (IS_ENABLED(CONFIG_MMC_SDHCI_UHS2))' > > * make sdhci-uhs2.c as a module > > * trivial changes, including > > - rename back sdhci-core.c to sdhci.c > > - allow vendor code to disable uhs2 if v4_mode == 0 > > in __sdhci_add_host() > > - merge uhs2_power_up() into mmc_power_up() > > - remove flag_uhs2 from mmc_attach_sd() > > - add function descriptions to EXPORT'ed functions > > - other minor code optimization > > > > Changes in v2 (Jan. 9, 2020) > > * rebased to v5.5-rc5 > > > > AKASHI Takahiro (5): > > mmc: sdhci: add a kernel configuration for enabling UHS-II support > > mmc: sdhci: add UHS-II module > > mmc: sdhci-uhs2: dump UHS-II registers > > mmc: sdhci-uhs2: add set_timeout() > > mmc: sdhci-pci: add UHS-II support framework > > > > Ben Chuang (1): > > mmc: sdhci-uhs2: add post-mmc_attach_sd hook > > > > Ulf Hansson (4): > > mmc: core: Cleanup printing of speed mode at card insertion > > mmc: core: Prepare to support SD UHS-II cards > > mmc: core: Announce successful insertion of an SD UHS-II card > > mmc: core: Extend support for mmc regulators with a vqmmc2 > > > > Victor Shih (16): > > mmc: core: Add definitions for SD UHS-II cards > > mmc: core: Support UHS-II card control and access > > mmc: sdhci: add UHS-II related definitions in headers > > mmc: sdhci-uhs2: add reset function and uhs2_mode function > > mmc: sdhci-uhs2: add set_power() to support vdd2 > > mmc: sdhci-uhs2: skip signal_voltage_switch() > > mmc: sdhci-uhs2: add set_ios() > > mmc: sdhci-uhs2: add detect_init() to detect the interface > > mmc: sdhci-uhs2: add clock operations > > mmc: sdhci-uhs2: add uhs2_control() to initialise the interface > > mmc: sdhci-uhs2: add request() and others > > mmc: sdhci-uhs2: add irq() and others > > mmc: sdhci-uhs2: add add_host() and others to set up the driver > > mmc: sdhci-uhs2: add pre-detect_init hook > > mmc: core: add post-mmc_attach_sd hook > > mmc: sdhci-pci-gli: enable UHS-II mode for GL9755 > > > > drivers/mmc/core/Makefile | 2 +- > > drivers/mmc/core/block.c | 6 +- > > drivers/mmc/core/bus.c | 38 +- > > drivers/mmc/core/core.c | 49 +- > > drivers/mmc/core/core.h | 1 + > > drivers/mmc/core/host.h | 4 + > > drivers/mmc/core/mmc_ops.c | 25 +- > > drivers/mmc/core/mmc_ops.h | 1 + > > drivers/mmc/core/regulator.c | 34 + > > drivers/mmc/core/sd.c | 16 +- > > drivers/mmc/core/sd.h | 3 + > > drivers/mmc/core/sd_ops.c | 18 + > > drivers/mmc/core/sd_ops.h | 3 + > > drivers/mmc/core/sd_uhs2.c | 1394 +++++++++++++++++++++++++ > > drivers/mmc/host/Kconfig | 10 + > > drivers/mmc/host/Makefile | 1 + > > drivers/mmc/host/sdhci-pci-core.c | 17 +- > > drivers/mmc/host/sdhci-pci-gli.c | 310 +++++- > > drivers/mmc/host/sdhci-pci.h | 3 + > > drivers/mmc/host/sdhci-uhs2.c | 1606 +++++++++++++++++++++++++++++ > > drivers/mmc/host/sdhci-uhs2.h | 226 ++++ > > drivers/mmc/host/sdhci.c | 342 +++--- > > drivers/mmc/host/sdhci.h | 125 ++- > > include/linux/mmc/card.h | 47 + > > include/linux/mmc/core.h | 13 + > > include/linux/mmc/host.h | 99 ++ > > include/linux/mmc/sd_uhs2.h | 263 +++++ > > 27 files changed, 4486 insertions(+), 170 deletions(-) > > create mode 100644 drivers/mmc/core/sd_uhs2.c > > create mode 100644 drivers/mmc/host/sdhci-uhs2.c > > create mode 100644 drivers/mmc/host/sdhci-uhs2.h > > create mode 100644 include/linux/mmc/sd_uhs2.h > > > > -- > > 2.25.1 > > Thanks, Victor Shih
