Date: Thu, 22 Jan 2009 17:55:31 +0200 From: Krassimir Slavchev <krassi@bulinfo.net> To: freebsd-arm@freebsd.org Subject: Re: Mount root from SD card?(solved!) Message-ID: <497896F3.9030908@bulinfo.net> In-Reply-To: <20090122151340.GE50103@cicely7.cicely.de> References: <20090121.100533.-1955669401.imp@bsdimp.com> <20090121.101459.2022307528.imp@bsdimp.com> <49776734.8030805@FreeBSD.org> <20090121.122842.-1582190967.imp@bsdimp.com> <20090122105650.GB50103@cicely7.cicely.de> <49787314.3070004@FreeBSD.org> <20090122142015.GC50103@cicely7.cicely.de> <49788702.9010808@FreeBSD.org> <20090122151340.GE50103@cicely7.cicely.de>
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Hi,
We have to send the command before enabling the PDC for reading. I do
not know why in the datasheet is opposite!
See the attached patch.
Thanks to All!
Best Regards
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filename="at91_mci.c.diff"
Index: at91_mci.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- at91_mci.c (revision 187590)
+++ at91_mci.c (working copy)
@@ -199,7 +199,7 @@
goto out;
}
sc->host.f_min =3D 375000;
- sc->host.f_max =3D at91_master_clock / 2; /* Typically 30MHz */
+ sc->host.f_max =3D AT91C_MASTER_CLOCK / 2; /* Typically 30MHz */
sc->host.host_ocr =3D MMC_OCR_320_330 | MMC_OCR_330_340;
if (sc->wire4)
sc->host.caps =3D MMC_CAP_4_BIT_DATA;
@@ -399,8 +399,8 @@
WR4(sc, MCI_ARGR, cmd->arg);
if (cmdr & MCI_CMDR_TRCMD_START) {
if (cmdr & MCI_CMDR_TRDIR) {
+ WR4(sc, MCI_CMDR, cmdr);
WR4(sc, PDC_PTCR, PDC_PTCR_RXTEN);
- WR4(sc, MCI_CMDR, cmdr);
} else {
WR4(sc, MCI_CMDR, cmdr);
WR4(sc, PDC_PTCR, PDC_PTCR_TXTEN);
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