Sergei Shtylyov wrote:
> Felix Domke wrote:
>> This adds support for the HDD and DVD SATA controller on the xenon
>> southbridge.
> Pleas post this to linux-ide@xxxxxxxxxxxxxxx in the future.
I'll do.
>> It also disables ATA_TFLAG_POLLING in libata-core, which prevented the
>> DVD drive
>> from being detected. It needs to be investigated what exactly is wrong
>> here.
>> tf.protocol = ATA_PROT_PIO;
>> - tf.flags |= ATA_TFLAG_POLLING; /* for polling presence detection */
>> +// tf.flags |= ATA_TFLAG_POLLING; /* for polling presence
>> detection */
> I doubt that this could *ever* get accepted.
It was not meant to be accepted, but to work around the problem which
was introduced in 2.6.19. I have far too less knowledge of the SATA
layer to understand why this flag exactly causes the detection of the
DVD-Drive fail.
As said, this needs to be investigated, and fixed (in the driver, of
course, not in the subsystem).
>> +static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned
>> int sc_reg, int device)
>> +{
>> + unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
>> +
> Why we need device and port_no arguments here?
As there is only one device/port per PCI device, the arguments should
probably be removed from this function, right.
>> + if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
>> + return 0; /* assume no error */
> Since SCR_ERROR == 1, this check seems broken.
Why?
Felix
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