[Patch] Serial ATAPI is not recognized

Vadim Chekan vchekan at cox.net
Fri Aug 12 07:15:32 GMT 2005


Hi all!

I've bought a SATA dvd burner, Plextor PX-712-SA and found that FreeBSD 
6 does not recognize it. But freebsd-5 does. After some time spent on 
investigation I found that it needs reset commad be issued before get 
ATAPI_MAGIC_LSB and ATAPI_MAGIC_MSB.

In ata-chipset.c:ata_sata_connect() I put
     ATA_IDX_OUTB(ch, ATA_ALTSTAT, ATA_A_IDS | ATA_A_RESET);
     ata_udelay(10000);
before
    if ((ATA_IDX_INB(ch, ATA_CYL_LSB) == ATAPI_MAGIC_LSB) &&

and it works now. At least I checked burncd in CDRW mode. It hungs or 
gives error at the end but produces valid CD.


Thanks,
Vadim Chekan.


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