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soc: versal2: Add SoC driver for AMD Versal Gen 2

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Communication is happening via firmware interface (SMC) or via direct
register reading if firmware driver is not available.

Also enable it via defconfig.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/22cf9c765e47ab03dbf2b8363e6626e809113432.1716994063.git.michal.simek@amd.com
This commit is contained in:
Michal Simek 2024-05-29 16:47:59 +02:00
parent 40f5046c22
commit 96cec1bbc9
4 changed files with 87 additions and 0 deletions
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1
configs/amd_versal2_virt_defconfig
View file

@ -119,6 +119,7 @@ CONFIG_ARM_DCC=y
CONFIG_PL01X_SERIAL=y
CONFIG_XILINX_UARTLITE=y
CONFIG_SOC_DEVICE=y
CONFIG_SOC_AMD_VERSAL2=y
CONFIG_SPI=y
CONFIG_DM_SPI=y
CONFIG_ZYNQ_SPI=y

8
drivers/soc/Kconfig
View file

@ -9,6 +9,14 @@ config SOC_DEVICE
need different parameters or quirks enabled depending on the
specific device variant in use.
config SOC_AMD_VERSAL2
bool "Enable SoC Device ID driver for AMD Versal Gen 2"
depends on SOC_DEVICE && ARCH_VERSAL2
help
Enable this option to select SoC device id driver for AMD Versal Gen 2.
This allows other drivers to verify the SoC familiy & revision using
matching SoC attributes.
config SOC_DEVICE_TI_K3
depends on SOC_DEVICE && ARCH_K3
bool "Enable SoC Device ID driver for TI K3 SoCs"

1
drivers/soc/Makefile
View file

@ -2,6 +2,7 @@
#
# Makefile for the U-Boot SOC specific device drivers.
obj-$(CONFIG_SOC_AMD_VERSAL2) += soc_amd_versal2.o
obj-$(CONFIG_SOC_SAMSUNG) += samsung/
obj-$(CONFIG_SOC_TI) += ti/
obj-$(CONFIG_SOC_DEVICE) += soc-uclass.o

77
drivers/soc/soc_amd_versal2.c Normal file
View file

@ -0,0 +1,77 @@
// SPDX-License-Identifier: GPL-2.0
/*
* AMD Versal Gen 2 SOC driver
*
* Copyright (C) 2022 - 2024, Advanced Micro Devices, Inc.
*/
#include <dm.h>
#include <soc.h>
#include <zynqmp_firmware.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <linux/bitfield.h>
/*
* v1 -> 0x10 - ES1
* v2 -> 0x20 - Production
*/
static const char versal2_family[] = "Versal Gen 2";
struct soc_amd_versal2_priv {
const char *family;
char revision;
};
static int soc_amd_versal2_get_family(struct udevice *dev, char *buf, int size)
{
struct soc_amd_versal2_priv *priv = dev_get_priv(dev);
return snprintf(buf, size, "%s", priv->family);
}
static int soc_amd_versal2_get_revision(struct udevice *dev, char *buf, int size)
{
struct soc_amd_versal2_priv *priv = dev_get_priv(dev);
return snprintf(buf, size, "v%d", priv->revision);
}
static const struct soc_ops soc_amd_versal2_ops = {
.get_family = soc_amd_versal2_get_family,
.get_revision = soc_amd_versal2_get_revision,
};
static int soc_amd_versal2_probe(struct udevice *dev)
{
struct soc_amd_versal2_priv *priv = dev_get_priv(dev);
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
priv->family = versal2_family;
if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
ret_payload);
if (ret)
return ret;
} else {
ret_payload[2] = readl(PMC_TAP_VERSION);
if (!ret_payload[2])
return -EINVAL;
}
priv->revision = FIELD_GET(PS_VERSION_MASK, ret_payload[2]);
return 0;
}
U_BOOT_DRIVER(soc_amd_versal2) = {
.name = "soc_amd_versal2",
.id = UCLASS_SOC,
.ops = &soc_amd_versal2_ops,
.probe = soc_amd_versal2_probe,
.priv_auto = sizeof(struct soc_amd_versal2_priv),
.flags = DM_FLAG_PRE_RELOC,
};