[PATCH v3 00/38] mmc: dw_mmc: Enable eMMC on E850-96 board
Sam Protsenko
semen.protsenko at linaro.org
Thu Jul 25 06:30:00 CEST 2024
Hi Jaehoon,
Can you please check this series, and if it looks good, apply it?
Thanks!
On Mon, Jul 22, 2024 at 12:57 PM Sam Protsenko
<semen.protsenko at linaro.org> wrote:
>
> Bring 64-bit support to dw_mmc core and Exynos dw_mmc drivers, and
> enable it on E850-96 board. Additionally do some related cleanups and
> device tree updates.
>
> 64-bit version of DesignWare MMC can be often found on modern ARM64
> chips. It's different from its older 32-bit version (which is already
> implemented in U-Boot): some new registers were added, existing
> register addresses are changed, DMA descriptor table is different, etc.
> Next Exynos chips are known to have 64-bit DW MMC block:
>
> - Exynos3475
> - Exynos5433
> - Exynos7420
> - Exynos7570
> - Exynos7580
> - Exynos7870
> - Exynos7872
> - Exynos7880
> - Exynos7885
> - Exynos7890
> - Exynos850 (Exynos3830)
>
> Exynos DW MMC driver was updated too: ARM64 Exynos chips implement their
> clock drivers using CCF framework, pinmux configuration is done at
> startup in DM capable pinctrl drivers, device tree properties were
> changed w.r.t. their upstream (Linux kernel) counterparts. CLKSEL
> register address is also different on 64-bit Exynos platforms.
>
> The patch series was tested on E850-96 board by running mainline Linux
> kernel with Debian rootfs from eMMC ("boot" partition) with these
> commands:
>
> 8<-------------------------------------------------------------------->8
> env set fdtaddr 0x8a000000
> env set bootaddr 0x94000000
> env set boot_kerneladdr 0x94000800
> part start mmc 0 boot boot_start
> part size mmc 0 boot boot_size
> mmc read $bootaddr $boot_start $boot_size
> abootimg addr $bootaddr
> abootimg get dtb --index=0 dtb_start dtb_size
> cp.b $dtb_start $fdtaddr $dtb_size
> fdt addr $fdtaddr 0x100000
> cp.b $boot_kerneladdr $loadaddr 2aaaa00
> env set bootargs console=ttySAC0,115200n8 printk.devkmsg=on \
> root=/dev/mmcblk0p12 rootwait rw
> booti $loadaddr - $fdtaddr
> 8<-------------------------------------------------------------------->8
>
> For E850-96 eMMC to function properly in DDR mode, the pending patch [1]
> has to be applied. Otherwise it won't be possible for exynos_dw_mmc
> driver to change CIU clock rate from 200 MHz up to 400 MHz, and MMC will
> fall back to SDR mode, which makes eMMC throughput twice as slower. With
> patch [1] applied, 'mmc info' reports this:
>
> Bus Speed: 52000000
> Mode: MMC DDR52 (52MHz)
>
> and 'clk dump' shows CIU clock rate to be ~400 MHz (after first mmc
> operation, e.g. 'part start' or 'mmc read'):
>
> 399750000 gout_mmc_embd_sdclkin
>
> Which makes sense, because dw_mmc requests to set CCLKIN = 52 MHz (with
> DDR/8-bit mode), and exynos_dw_mmc tries to set CIU clock rate to:
>
> SDCLKIN = 2 * ciu_div * CCLKIN = 2 * 4 * 52 MHz = 416 MHz,
>
> and the closest possible value the clock driver can set is 399.75 MHz,
> which works just fine.
>
> For Exynos4 and Exynos5 (ARM32) boards, this patch series was only build
> tested (manually and with buildman). The build is clean (no errors or
> warnings), but I don't have any Exynos4/Exynos5 boards at my disposal,
> so I can't actually verify MMC operation there.
>
> Changes in v3:
> - Rebased all patches on top of the most recent master, which in turn
> dropped next patches:
> - [PATCH v2 1/40] mmc: dw_mmc: Remove common.h
> - [PATCH v2 33/40] mmc: exynos_dw_mmc: Remove common.h
>
> Changes in v2:
> - Rebased on top of the most recent U-Boot/master
> - Added pending R-b tags from the mailing list
> - Addressed the comment from Quentin about CONFIG_IS_ENABLED() not
> playing nice in SPL case:
> 1. Dropped [PATCH 35/42]
> ("mmc: exynos_dw_mmc: Use CONFIG_IS_ENABLED() to check config
> options")
> 2. Dropped [PATCH 14/42]
> ("mmc: dw_mmc: Use CONFIG_IS_ENABLED() to check config options")
> 3. Got rid of all other CONFIG_IS_ENABLED() changes (used #ifdef for
> now)
> - Addressed the comment from Quentin about incorrect logic for divider
> update in [PATCH 06/40]
> - Guarded exynos_dwmmc_of_to_plat() with #ifded CONFIG_DM_MMC in
> [PATCH 22/40]
> - Added list of Exynos chips implementing 64-bit IDMAC descriptor (in
> [PATCH 00/40])
>
> [1] https://lists.denx.de/pipermail/u-boot/2024-March/547719.html
>
> Sam Protsenko (38):
> mmc: dw_mmc: Remove unused version field from struct dwmci_host
> mmc: dw_mmc: Move struct idmac to dw_mmc.c
> mmc: dw_mmc: Extract waiting for data busy into a separate routine
> mmc: dw_mmc: Extract FIFO init into a separate routine
> mmc: dw_mmc: Extract divider update to a separate function
> mmc: dw_mmc: Extract FIFO data transfer into a separate routine
> mmc: dw_mmc: Extract DMA transfer handling code into a separate
> routine
> mmc: dw_mmc: Extract setting the DMA descriptor into a separate
> routine
> mmc: dw_mmc: Improve 32-bit IDMAC descriptor namings
> mmc: dw_mmc: Add support for 64-bit IDMAC
> mmc: dw_mmc: Replace fifoth_val property with fifo-depth
> mmc: dw_mmc: Fix kernel-doc comments in dwmmc.h
> mmc: dw_mmc: Improve coding style
> arm: dts: exynos: Add upstream DW MMC properties to all Exynos dts
> dt-bindings: exynos: Update bindings doc for DW MMC controller
> arm: exynos: Add header guard for dwmmc.h
> mmc: exynos_dw_mmc: Fix obtaining the base address of controller
> mmc: exynos_dw_mmc: Fix getting private data in
> exynos_dwmci_board_init()
> mmc: exynos_dw_mmc: Don't call pinmux functions on ARM64 chips
> mmc: exynos_dw_mmc: Obtain and use CIU clock via CCF API
> mmc: exynos_dw_mmc: Use .of_to_plat for device tree parsing
> mmc: exynos_dw_mmc: Convert to use livetree API
> mmc: exynos_dw_mmc: Read upstream SDR timing properties
> mmc: exynos_dw_mmc: Abstract CLKSEL register
> mmc: exynos_dw_mmc: Refactor fixed CIU clock divider
> mmc: exynos_dw_mmc: Read common bus-width property
> mmc: exynos_dw_mmc: Read common clock-frequency property
> mmc: exynos_dw_mmc: Move quirks from struct dwmci_host to chip data
> mmc: exynos_dw_mmc: Read and use DDR timing when available
> mmc: exynos_dw_mmc: Set requested freq in get_mmc_clk() callback
> mmc: exynos_dw_mmc: Add support for ARM64 Exynos chips
> mmc: exynos_dw_mmc: Pull all init code into probe function
> mmc: exynos_dw_mmc: Don't call dwmci_setup_cfg() after add_dwmci()
> mmc: exynos_dw_mmc: Use dev->name as driver's displayed name
> mmc: exynos_dw_mmc: Improve coding style
> arm: dts: exynos: Remove outdated DW MMC properties in all Exynos dts
> configs: e850-96: Enable MMC
> doc: samsung: Mention enabled eMMC in E850-96 board doc
>
> arch/arm/dts/exynos4210-origen.dts | 3 +-
> arch/arm/dts/exynos4210-trats.dts | 6 +-
> arch/arm/dts/exynos4210-universal_c210.dts | 6 +-
> arch/arm/dts/exynos4412-odroid.dts | 14 +-
> arch/arm/dts/exynos4412-trats2.dts | 20 +-
> arch/arm/dts/exynos5250-arndale.dts | 10 +-
> arch/arm/dts/exynos5250-smdk5250.dts | 13 +-
> arch/arm/dts/exynos5250-snow.dts | 13 +-
> arch/arm/dts/exynos5250-spring.dts | 7 +-
> arch/arm/dts/exynos5420-smdk5420.dts | 13 +-
> arch/arm/dts/exynos5422-odroidxu3.dts | 4 +-
> arch/arm/dts/exynos54xx.dtsi | 13 +-
> arch/arm/mach-exynos/include/mach/dwmmc.h | 40 +-
> configs/e850-96_defconfig | 10 +-
> doc/board/samsung/e850-96.rst | 5 +-
> doc/device-tree-bindings/exynos/dwmmc.txt | 46 +-
> drivers/mmc/ca_dw_mmc.c | 2 +-
> drivers/mmc/dw_mmc.c | 549 +++++++++++++--------
> drivers/mmc/exynos_dw_mmc.c | 357 +++++++++-----
> drivers/mmc/ftsdc010_mci.h | 1 -
> drivers/mmc/hi6220_dw_mmc.c | 7 +-
> drivers/mmc/nexell_dw_mmc.c | 5 +-
> drivers/mmc/rockchip_dw_mmc.c | 5 +-
> drivers/mmc/s5p_sdhci.c | 2 +-
> drivers/mmc/snps_dw_mmc.c | 6 +-
> drivers/mmc/socfpga_dw_mmc.c | 4 +-
> include/dwmmc.h | 242 +++++----
> 27 files changed, 868 insertions(+), 535 deletions(-)
>
> --
> 2.39.2
>
More information about the U-Boot
mailing list