On Tue, 14 Nov 2023 at 22:08, Drew Fustini <dfustini@xxxxxxxxxxxx> wrote: > > This series adds support for the MMC controller in the T-Head TH1520 > SoC, and it enables the eMMC and microSD slot on both the BeagleV > Ahead and the Sipeed LicheePi 4A. > > I tested on top of v6.6 with riscv defconfig. I was able to boot the > Ahead [1] and LPi4a [2] from eMMC. This patch series also exists as a > git branch [3]. > > Note: I have only tested eMMC and microSD. I have not yet configured > or tested the mmc controller used for SDIO WiFi yet. > > References: > [1] https://gist.github.com/pdp7/881342620ec1509685f23a387e2fc8d7 > [2] https://gist.github.com/pdp7/97017ad88d83fccac18eba69bff817b7 > [3] https://github.com/pdp7/linux/tree/b4/th1520-mmc > > Changes in PATCH v6: > - set the mmc nodes to disabled in the th1520.dtsi Patch 1 -> 3 , applied for next, thanks! Kind regards Uffe > > Changes in PATCH v5: > https://lore.kernel.org/r/20231109-th1520-mmc-v5-0-018bd039cf17@xxxxxxxxxxxx > - fix logic in th1520_sdhci_set_phy() to correctly check that both > MMC_CAP2_NO_SD and MMC_CAP2_NO_SDIO are set in host->mmc->caps2 > - add Acked-by's from Adrian > > Changes in PATCH v4: > https://lore.kernel.org/linux-riscv/20231101-th1520-mmc-v4-0-86e0216b5994@xxxxxxxxxxxx/ > - set DWCMSHC_CARD_IS_EMMC when (MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO) > as checking MMC_CAP_NONREMOVABLE is not sufficient > - change prefix of phy functions from th1520 to dwcmshc as they are not > th1520 specific > - remove unneeded check of priv in dwcmshc_phy_1_8v_init() > - remove unneeded check of auto-tuning in th1520_execute_tuning() > - fix order of new nodes in th1520-beaglev-ahead.dts: move sdhci_clk > before uart_sclk, move mmc0 and mmc1 before uart0 > - fix comment typos pointed out by Adrian > - add trailers that I missed from v2 > > Changes in PATCH v3: > https://lore.kernel.org/r/20231023-th1520-mmc-v3-0-abc5e7491166@xxxxxxxxxxxx > - always call th1520_sdhci_set_phy() in th1520_set_uhs_signaling() > and not only when timing is MMC_TIMING_MMC_HS400. This allows the > microSD slot to work as th1520_phy_3_3v_init() is called from > th1520_sdhci_set_phy(). > - add mmc1 node for mmc controller connected to the microSD slot > - add enable mmc1 and add properties for microSD on the Ahead and LPi4A > > Changes in PATCH v2: > https://lore.kernel.org/r/20231017-th1520-mmc-v2-0-4678c8cc4048@xxxxxxxxxxxx > - make use of BIT(), GENMASK(), FIELD_PREP(), FIELD_GET() > - add EXPORT_SYMBOL_GPL(__sdhci_execute_tuning) > - call th1520_phy_1_8v_init() when FLAG_IO_FIXED_1V8 is set > - set DWCMSHC_CARD_IS_EMMC when mmc caps contains MMC_CAP_NONREMOVABLE > - remove manipulation of AT_CTRL_AT_EN from th1520_set_uhs_signaling() > - remove unneccessary cycle of enabling and disabling AT_CTRL_AT_EN in > th1520_execute_tuning() > - remove th1520_phy_1_8v_init_no_pull() > - remove th1520_phy_3_3v_init_no_pull() > - remove FLAG_PULL_UP_EN from priv->flags > - remove thead,phy-pull-up device tree property > > Changes in PACH v1: > https://lore.kernel.org/all/20230921-th1520-mmc-v1-0-49f76c274fb3@xxxxxxxxxxxx/ > - ADMA mode now works correctly due to a patch from Jisheng on the list > ("riscv: dts: thead: set dma-noncoherent to soc bus") and this commit > from Icenowy that is now merged: 8eb8fe67e2c8 ("riscv: errata: fix > T-Head dcache.cva encoding"). > - Expose __sdhci_execute_tuning from sdhci.c so that it can be called > from th1520_execute_tuning() > - Refactor the define macros for all the PHY related registers to make > it easier to understand the bit fields that the code is manipulating > - Replace magic numbers in the PHY register writes with proper defines > - Replace non_removable in dwcmshc_priv with check of mmc_host.caps > - Drop dt prop "thead,io-fixed-1v8" and instead check for existing > properties: "mmc-ddr-1_8v", "mmc-hs200-1_8v", or "mmc-hs400-1_8v" > - Rename dt prop from "thead,pull-up" to "thead,phy-pull-up" and > improve the description in the dt binding > - Replace pull_up_en in dwcmshc_priv with bit field in new flags field > - Create th1520_set_uhs_signaling() and call dwcmshc_set_uhs_signaling() > from it instead of adding th1520 code to dwcmshc_set_uhs_signaling() > - Return -EIO instead of -1 upon errors in th1520_execute_tuning() > > Changes in RFC v2: > https://lore.kernel.org/linux-riscv/20230724-th1520-emmc-v2-0-132ed2e2171e@xxxxxxxxxxxx/ > - Expand dwcmshc_priv based on driver in the T-Head 5.10 kernel: > delay_line, non_removable, pull_up_en, io_fixed_1v8 > - New boolean property "thead,pull-up" indicates phy pull-up config > - New boolean property "thead,io-fixed-1v8" indicates that io voltage > should be set to 1.8V during reset > - Add th1520_phy_1_8v_init() as voltage_switch op > - Add th1520_execute_tuning() as the platform_execute_tuning op > - Added th1520_sdhci_reset() as the .reset op. This function will set > io voltage to 1.8V after calling the standard sdhci_reset() function. > - Modified dwcmshc_set_uhs_signaling() to enable SDHCI_CTRL_VDD_180 when > io_fixed_1v8 is true > - Add many defines for register offsets and settings based on the mmc > support in the T-Head downstream v5.10 kernel > > RFC v1 series: > https://lore.kernel.org/r/20230724-th1520-emmc-v1-0-cca1b2533da2@xxxxxxxxxxxx > > Signed-off-by: Drew Fustini <dfustini@xxxxxxxxxxxx> > --- > Drew Fustini (7): > dt-bindings: mmc: sdhci-of-dwcmhsc: Add T-Head TH1520 support > mmc: sdhci: add __sdhci_execute_tuning() to header > mmc: sdhci-of-dwcmshc: Add support for T-Head TH1520 > riscv: defconfig: Enable mmc and dma drivers for T-Head TH1520 > riscv: dts: thead: Add TH1520 mmc controllers and sdhci clock > riscv: dts: thead: Enable BeagleV Ahead eMMC and microSD > riscv: dts: thead: Enable LicheePi 4A eMMC and microSD > > .../bindings/mmc/snps,dwcmshc-sdhci.yaml | 1 + > arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts | 20 ++ > .../boot/dts/thead/th1520-lichee-module-4a.dtsi | 20 ++ > arch/riscv/boot/dts/thead/th1520.dtsi | 25 ++ > arch/riscv/configs/defconfig | 2 + > drivers/mmc/host/sdhci-of-dwcmshc.c | 349 +++++++++++++++++++++ > drivers/mmc/host/sdhci.c | 3 +- > drivers/mmc/host/sdhci.h | 1 + > 8 files changed, 420 insertions(+), 1 deletion(-) > --- > base-commit: 8cfd133bee055fb537d2338b808079a77de60052 > change-id: 20231031-th1520-mmc-b4e846fe6869 > > Best regards, > -- > Drew Fustini <dfustini@xxxxxxxxxxxx> >
