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mmc_da: create disk(9) for pre-2.0 SD cards

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It does not look like there is anything in mmc_da code that actually
requires protocol 2.0 or later.  dev/mmc code also does not have such a
restriction.

Tested with a very old 2GB mini-SD card.  Prior to this change mmc_da
would claim the card but would not expose it to GEOM.

Without MMCCAM:
 mmc0: <MMC/SD bus> on sdhci_pci0
 mmc0: Probing bus
 mmc0: SD probe: OK (OCR: 0x00ff8000)
 mmc0: Current OCR: 0x00ff8000
 mmc0: CMD8 failed, RESULT: 1
 mmc0: Probing cards
 mmc0: New card detected (CID 1c53565344432020100002982e007600)
 mmc0: New card detected (CSD 005e00325f5a83d02db7ffbf96800000)
 mmc0: Card at relative address 0xb368 added:
 mmc0:  card: SD SDC   1.0 SN 0002982E MFG 06/2007 by 28 SV
 mmc0:  quirks: 0
 mmc0:  bus: 4bit, 50MHz (high speed timing)
 mmc0:  memory: 3998720 blocks, erase sector 256 blocks
 mmc0: setting transfer rate to 50.000MHz (high speed timing)
 GEOM: new disk mmcsd0
 mmcsd0: 2GB <SD SDC   1.0 SN 0002982E MFG 06/2007 by 28 SV> at mmc0 50.0MHz/4bit/65535-block
 mmc0: setting bus width to 4 bits high speed timing

With MMCCAM and this change:
 sdda0 at sdhci_slot0 bus 0 scbus2 target 0 lun 0
 sdda0: Relative addr: 0000b368
 Card features: <Memory>
 sdda0: Serial Number 0002982E
 sdda0: SD SDC   1.0 SN 0002982E MFG 06/2007 by 28 SV
 GEOM: new disk sdda0

Reviewed by:	manu
MFC after:	3 weeks
This commit is contained in:
Andriy Gapon 2022-01-27 18:49:27 +02:00
parent 2a7e4cf843
commit 6fd84a627f
1 changed files with 1 additions and 1 deletions
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2
sys/cam/mmc/mmc_da.c
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@ -1481,7 +1481,7 @@ sdda_start_init(void *context, union ccb *start_ccb)
/* MMC partitions support */
if (mmcp->card_features & CARD_FEATURE_MMC && mmc_get_spec_vers(periph) >= 4) {
sdda_process_mmc_partitions(periph, start_ccb);
} else if (mmcp->card_features & CARD_FEATURE_SD20) {
} else if (mmcp->card_features & CARD_FEATURE_MEMORY) {
/* For SD[HC] cards, just add one partition that is the whole card */
if (sdda_add_part(periph, 0, "sdda",
periph->unit_number,