kernel.git/drivers/mmc/core/sd.c, branch linux-6.16.y

mmc: rename mmc_host_uhs() to mmc_host_can_uhs()

2025-05-14T15:07:48Z

It is not obvious that this functions checks capabilities. Rename it to include '_can' like other capability helpers. Signed-off-by: Wolfram Sang Link: https://lore.kernel.org/r/20250501063325.7262-9-wsa+renesas@sang-engineering.com Signed-off-by: Ulf Hansson

mmc: core: Add support for graceful host removal for SD

2025-05-14T14:59:16Z

An mmc host driver may allow to unbind from its corresponding host device. If an SD card is attached to the host, the mmc core will just try to cut the power for it, without obeying to the SD spec that potentially may damage the card. Let's fix this problem by implementing a graceful power-down of the card at host removal. Reviewed-by: Wolfram Sang Tested-by: Wolfram Sang Signed-off-by: Ulf Hansson Link: https://lore.kernel.org/r/20250407152759.25160-6-ulf.hansson@linaro.org

mmc: Add quirk to disable DDR50 tuning

2025-05-14T14:59:16Z

Adds the MMC_QUIRK_NO_UHS_DDR50_TUNING quirk and updates mmc_execute_tuning() to return 0 if that quirk is set. This fixes an issue on certain Swissbit SD cards that do not support DDR50 tuning where tuning requests caused I/O errors to be thrown. Signed-off-by: Erick Shepherd Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/20250331221337.1414534-1-erick.shepherd@ni.com Signed-off-by: Ulf Hansson

mmc: core: Trim trailing whitespace from card product names

2025-03-12T10:30:22Z

Product names for some eMMC chips can include trailing whitespace, which seems to be rather uncommon, but makes emitted messages and /sys properties somewhat unsightly. Here's such an example from a Pine64 PineNote, in which "Biwin ", as the eMMC product name, contains trailing whitespace: mmc0: new HS200 MMC card at address 0001 mmcblk0: mmc0:0001 Biwin 115 GiB mmcblk0: p1 p2 p3 p4 p5 p6 p7 mmcblk0boot0: mmc0:0001 Biwin 4.00 MiB mmcblk0boot1: mmc0:0001 Biwin 4.00 MiB mmcblk0rpmb: mmc0:0001 Biwin 4.00 MiB, chardev (249:0) Trailing whitespace in /sys properties may even cause some unforeseen issues with some scripts, so let's have the trailing whitespace trimmed in product names for eMMC chips. Although not observed yet by the author of these changes, the same trailing whitespace may appear in SD card product names, so let's trim them as well, which can't hurt. Touch-up one comment as well, by using proper capitalization. Signed-off-by: Dragan Simic Acked-by: Avri Altman Link: https://lore.kernel.org/r/fb7fcecae737f3e8b279854d7c853000527cba9a.1740597891.git.dsimic@manjaro.org Signed-off-by: Ulf Hansson

mmc: core: Support UHS-II card control and access

2024-10-24T12:22:24Z

Embed UHS-II access/control functionality into the MMC request processing flow. Signed-off-by: Jason Lai Signed-off-by: Victor Shih Message-ID: <20241018105333.4569-2-victorshihgli@gmail.com> [Ulf: A couple of cleanups and fixed sd_uhs2_power_off()] Signed-off-by: Ulf Hansson

mmc: core: Enable SDUC

2024-10-14T10:40:10Z

Enable SDUC if the card responded to ACMD41 with HCS & HO2T bits set. Reviewed-by: Adrian Hunter Signed-off-by: Avri Altman Link: https://lore.kernel.org/r/20241006051148.160278-11-avri.altman@wdc.com Signed-off-by: Ulf Hansson

mmc: core: Prevent HSQ from enabling for SDUC

2024-10-14T10:40:09Z

hsq allows to get more in-flight requests from mmc core, which can be prepared in advance and be issued asynchronously to the completion of the preceding request (in atomic context). This is presumably broken though by the mandatory CMD22 for SDUC. We plan to make it work, but only as an improvement on top of the initial support for SDUC. Signed-off-by: Avri Altman Link: https://lore.kernel.org/r/20241006051148.160278-10-avri.altman@wdc.com Signed-off-by: Ulf Hansson

mmc: sd: SDUC Support Recognition

2024-10-14T10:29:01Z

Ultra Capacity SD cards (SDUC) was already introduced in SD7.0. Those cards support capacity larger than 2TB and up to including 128TB. ACMD41 was extended to support the host-card handshake during initialization. The card expects that the HCS & HO2T bits to be set in the command argument, and sets the applicable bits in the R3 returned response. On the contrary, if a SDUC card is inserted to a non-supporting host, it will never respond to this ACMD41 until eventually, the host will timed out and give up. Also, add SD CSD version 3.0 - designated for SDUC, and properly parse the csd register as the c_size field got expanded to 28 bits. Do not enable SDUC for now - leave it to the last patch in the series. Tested-by: Ricky WU Reviewed-by: Adrian Hunter Signed-off-by: Avri Altman Link: https://lore.kernel.org/r/20241006051148.160278-2-avri.altman@wdc.com Signed-off-by: Ulf Hansson

mmc: core: Add SD card quirk for broken poweroff notification

2024-10-14T10:29:00Z

GIGASTONE Gaming Plus microSD cards manufactured on 02/2022 report that they support poweroff notification and cache, but they are not working correctly. Flush Cache bit never gets cleared in sd_flush_cache() and Poweroff Notification Ready bit also never gets set to 1 within 1 second from the end of busy of CMD49 in sd_poweroff_notify(). This leads to I/O error and runtime PM error state. I observed that the same card manufactured on 01/2024 works as expected. This problem seems similar to the Kingston cards fixed with commit c467c8f08185 ("mmc: Add MMC_QUIRK_BROKEN_SD_CACHE for Kingston Canvas Go Plus from 11/2019") and should be handled using quirks. CID for the problematic card is here. 12345641535443002000000145016200 Manufacturer ID is 0x12 and defined as CID_MANFID_GIGASTONE as of now, but would like comments on what naming is appropriate because MID list is not public and not sure it's right. Signed-off-by: Keita Aihara Link: https://lore.kernel.org/r/20240913094417.GA4191647@sony.com Signed-off-by: Ulf Hansson

mmc: core Convert UNSTUFF_BITS macro to inline function

2024-09-03T12:34:24Z

The UNSTUFF_BITS macro, which is defined in both drivers/mmc/core/mmc.c and drivers/mmc/core/sd.c, has been converted to an inline function to improve readability, maintainability, and type safety. Signed-off-by: Avri Altman Link: https://lore.kernel.org/r/20240902123331.3566447-1-avri.altman@wdc.com Signed-off-by: Ulf Hansson