[src/trunk]: src/sys/arch/arm/nvidia Disable SDR104 until the Tegra K1 custom...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a11f72dcc606
branches:  trunk
changeset: 823215:a11f72dcc606
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Apr 16 13:27:19 2017 +0000

description:
Disable SDR104 until the Tegra K1 custom tuning method is implemented.
This is required to work around errata that describes periodic data CRC
errors after autotuning has completed.

diffstat:

 sys/arch/arm/nvidia/tegra_sdhc.c |  12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diffs (33 lines):

diff -r 0a9a919bb85c -r a11f72dcc606 sys/arch/arm/nvidia/tegra_sdhc.c
--- a/sys/arch/arm/nvidia/tegra_sdhc.c  Sun Apr 16 13:09:40 2017 +0000
+++ b/sys/arch/arm/nvidia/tegra_sdhc.c  Sun Apr 16 13:27:19 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_sdhc.c,v 1.16 2017/04/11 11:06:02 jmcneill Exp $ */
+/* $NetBSD: tegra_sdhc.c,v 1.17 2017/04/16 13:27:19 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "locators.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.16 2017/04/11 11:06:02 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.17 2017/04/16 13:27:19 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -124,6 +124,14 @@
        }
        sc->sc_bsz = size;
 
+       /* XXX SDR104 requires a custom tuning method on Tegra K1 */
+       sc->sc.sc_flags |= SDHC_FLAG_HOSTCAPS;
+       sc->sc.sc_caps = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
+           SDHC_CAPABILITIES);
+       sc->sc.sc_caps2 = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
+           SDHC_CAPABILITIES2);
+       sc->sc.sc_caps2 &= ~SDHC_SDR104_SUPP;
+
        sc->sc_pin_power = fdtbus_gpio_acquire(faa->faa_phandle,
            "power-gpios", GPIO_PIN_OUTPUT);
        if (sc->sc_pin_power)