[Bug 297574] mmcsd: diskinfo returns bridge ID and serial instead of card ID and serial

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297574

            Bug ID: 297574
           Summary: mmcsd: diskinfo returns bridge ID and serial instead
                    of card ID and serial
           Product: Base System
           Version: 15.1-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: [email protected]
          Reporter: [email protected]

Scenario:
- FreeBSD stable/15 at bf0ffcaa5649 with minor patches
- Inserting any SD card (SDXC) into card reader; it shows up as da0
- Issuing "diskinfo -v /dev/da0"

Result:
- The command always returns the ID and serial of the bridge:

[0]# diskinfo -v /dev/da0
/dev/da0
        512             # sectorsize
        512711720960    # mediasize in bytes (478G)
        1001390080      # mediasize in sectors
        0               # stripesize
        0               # stripeoffset
        62333           # Cylinders according to firmware.
        255             # Heads according to firmware.
        63              # Sectors according to firmware.
        Mass Storage Device     # Disk descr.
        121220160204    # Disk ident.
        umass-sim0      # Attachment
        No              # TRIM/UNMAP support
        Unknown         # Rotation rate in RPM
        Not_Zoned       # Zone Mode

[0]# 

- The "Disk descr." and "Disk ident." are always the same, regardless of disk
inserted.

Expected result:
- A saved output from 2019 looks like this:

[0]# cat diskinfo.-v 
/dev/mmcsd0
        512             # sectorsize
        62914560000     # mediasize in bytes (59G)
        122880000       # mediasize in sectors
        4194304         # stripesize
        0               # stripeoffset
        SDHC SDU1  1.0 SN 14A11C28 MFG 09/2018 by 27 SM # Disk descr.
        14A11C28        # Disk ident.
        Yes             # TRIM/UNMAP support
        0               # Rotation rate in RPM

[0]# 

- The description and identity are from the card and change depending on which
card is inserted.

Notes:
- It seems that with the CAMification of the SD card driver, the functionality
for reading the correct information was lost.

-- Martin

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