On Sun, Mar 19, 2017 at 07:13:52PM +0100, Lucas Stach wrote: > This driver performs the required initialization to get the GPU > into a functional state, so it can be used when the OS is running. > > Signed-off-by: Lucas Stach <dev@xxxxxxxxxx> > --- > drivers/Kconfig | 1 + > drivers/Makefile | 1 + > drivers/memory/Kconfig | 11 +++++++ > drivers/memory/Makefile | 1 + > drivers/memory/mc-tegra124.c | 75 ++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 89 insertions(+) > create mode 100644 drivers/memory/Kconfig > create mode 100644 drivers/memory/Makefile > create mode 100644 drivers/memory/mc-tegra124.c Applied, thanks Sascha > > diff --git a/drivers/Kconfig b/drivers/Kconfig > index bf31115..ab9afb5 100644 > --- a/drivers/Kconfig > +++ b/drivers/Kconfig > @@ -34,5 +34,6 @@ source "drivers/rtc/Kconfig" > source "drivers/firmware/Kconfig" > source "drivers/phy/Kconfig" > source "drivers/crypto/Kconfig" > +source "drivers/memory/Kconfig" > > endmenu > diff --git a/drivers/Makefile b/drivers/Makefile > index 0fadf4e..a1d2d23 100644 > --- a/drivers/Makefile > +++ b/drivers/Makefile > @@ -35,3 +35,4 @@ obj-$(CONFIG_GENERIC_PHY) += phy/ > obj-$(CONFIG_HAB) += hab/ > obj-$(CONFIG_CRYPTO_HW) += crypto/ > obj-$(CONFIG_AIODEV) += aiodev/ > +obj-y += memory/ > diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig > new file mode 100644 > index 0000000..39fd644 > --- /dev/null > +++ b/drivers/memory/Kconfig > @@ -0,0 +1,11 @@ > +menu "Memory controller drivers" > + > +config MC_TEGRA124 > + bool "Support for Tegra124 memory controller" > + depends on ARCH_TEGRA > + help > + Say yes here to include the driver for the memory controller found on > + the Tegra124 SoC. This driver performs the necessary initialization > + to provide a function GPU when the OS is running. > + > +endmenu > diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile > new file mode 100644 > index 0000000..bd5ace9 > --- /dev/null > +++ b/drivers/memory/Makefile > @@ -0,0 +1 @@ > +obj-$(CONFIG_MC_TEGRA124) += mc-tegra124.o > diff --git a/drivers/memory/mc-tegra124.c b/drivers/memory/mc-tegra124.c > new file mode 100644 > index 0000000..a8d1609 > --- /dev/null > +++ b/drivers/memory/mc-tegra124.c > @@ -0,0 +1,75 @@ > +/* * > + * Copyright (C) 2017 Lucas Stach <l.stach@xxxxxxxxxxxxxx> > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > + * more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program. If not, see <http://www.gnu.org/licenses/>. > + */ > + > +#include <common.h> > +#include <init.h> > +#include <io.h> > +#include <of.h> > + > +#define MC_VIDEO_PROTECT_SIZE_MB 0x64c > +#define MC_VIDEO_PROTECT_REG_CTRL 0x650 > +#define MC_VIDEO_PROTECT_REG_WR_DIS (1 << 0) > + > +static int tegra124_mc_of_fixup(struct device_node *root, void *context) > +{ > + struct device_node *np; > + > + np = of_find_compatible_node(root, NULL, "nvidia,gk20a"); > + if (np) > + of_device_enable(np); > + > + return 0; > +} > + > +static int tegra124_mc_probe(struct device_d *dev) > +{ > + struct resource *iores; > + void __iomem *base; > + > + iores = dev_request_mem_resource(dev, 0); > + if (IS_ERR(iores)) { > + dev_err(dev, "could not get memory region\n"); > + return PTR_ERR(iores); > + } > + base = IOMEM(iores->start); > + > + /* disable video protect region */ > + writel(0 , base + MC_VIDEO_PROTECT_SIZE_MB); > + writel(MC_VIDEO_PROTECT_REG_WR_DIS, base + MC_VIDEO_PROTECT_REG_CTRL); > + readl(base + MC_VIDEO_PROTECT_REG_CTRL); /* readback to flush */ > + > + return of_register_fixup(tegra124_mc_of_fixup, NULL); > +} > + > +static __maybe_unused struct of_device_id tegra124_mc_dt_ids[] = { > + { > + .compatible = "nvidia,tegra124-mc", > + }, { > + /* sentinel */ > + }, > +}; > + > +static struct driver_d tegra124_mc_driver = { > + .name = "tegra124-mc", > + .of_compatible = DRV_OF_COMPAT(tegra124_mc_dt_ids), > + .probe = tegra124_mc_probe, > +}; > + > +static int __init tegra124_mc_init(void) > +{ > + return platform_driver_register(&tegra124_mc_driver); > +} > +device_initcall(tegra124_mc_init); > -- > 2.9.3 > > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
