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 at lynxeye.de>
> ---
> 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 at pengutronix.de>
> + *
> + * 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
>
>
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