Date: Wed, 10 Sep 2008 18:55:55 +0200 From: "Marco Trillo" <marcotrillo@gmail.com> To: "Nathan Whitehorn" <nwhitehorn@freebsd.org> Cc: powerpc@freebsd.org Subject: Re: Call for testers: Apple ATA DMA Message-ID: <b9c23c9f0809100955v1d44711od107a6b2f547a7bd@mail.gmail.com> In-Reply-To: <48C7F336.6060003@freebsd.org> References: <48C69864.3010208@freebsd.org> <b9c23c9f0809100322n1659cb36oa05acf2f13f3c7e1@mail.gmail.com> <48C7F336.6060003@freebsd.org>
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Hi,
On Wed, Sep 10, 2008 at 6:17 PM, Nathan Whitehorn
> Thanks! I had just assumed that the NetBSD driver did the right thing, and
> only have a CD drive attached to a Shasta controller on which to test the
> Kauai driver. I'll change it to do things the right way.
Thank you for your work on this!
If I'm not mistaken the Shasta does ATA/133 - UDMA6, while the Kauai
only does ATA/100 - UDMA5.
Mac OS X uses a different set of timing values for the Shasta
controller than it uses for Kauai; these new timing values include the
UDMA6 mode.
The following are the timing values for the Shasta straight from the
Mac OS X AppleKauaiATA.cpp driver available at [1].
static const u_int pio_timing_shasta[] = {
0x0A000C97, /* Mode 0 */
0x07000712, /* 1 */
0x040003CD, /* 2 */
0x0400028B, /* 3 */
0x0400010A /* 4 */
};
static const u_int dma_timing_shasta[] = {
0x00820800, /* Mode 0 */
0x0028B000, /* 1 */
0x001CA000 /* 2 */
};
static const u_int udma_timing_shasta[] = {
0x00035901, /* Mode 0 */
0x000348b1, /* 1 */
0x00033881, /* 2 */
0x00033861, /* 3 */
0x00033841, /* 4 */
0x00033031, /* 5 */
0x00033021 /* 6 */
};
Hope you find it useful!
[1] http://www.opensource.apple.com/darwinsource/10.4.11.ppc/AppleKauaiATA-121.3.4/AppleKauaiATA.cpp
Regards,
Marco.
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