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https://github.com/AsahiLinux/u-boot
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64fc7fc887
Add soc_xilinx_versal_net driver to identify the family & revision of versal-net SoC. Add Kconfig option CONFIG_SOC_XILINX_VERSAL_NET to enable/disable this driver. To enable this driver by default, add this config to xilinx_versal_net_virt_defconfig file. This driver will be probed using platdata U_BOOT_DEVICE structure which is specified in mach-versal-net/cpu.c. Signed-off-by: Michal Simek <michal.simek@amd.com> Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com> Link: https://lore.kernel.org/r/613d6bcffd9070f62cf348079ed16c120f8fc56f.1668612993.git.michal.simek@amd.com
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Xilinx Versal NET SOC driver
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*
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* Copyright (C) 2022, Advanced Micro Devices, Inc.
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*/
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#include <common.h>
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#include <dm.h>
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#include <soc.h>
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#include <zynqmp_firmware.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <linux/bitfield.h>
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/*
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* v1 -> 0x10 - ES1
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* v2 -> 0x20 - Production
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*/
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static const char versal_family[] = "Versal NET";
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struct soc_xilinx_versal_net_priv {
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const char *family;
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char revision;
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};
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static int soc_xilinx_versal_net_get_family(struct udevice *dev, char *buf, int size)
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{
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struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev);
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return snprintf(buf, size, "%s", priv->family);
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}
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static int soc_xilinx_versal_net_get_revision(struct udevice *dev, char *buf, int size)
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{
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struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev);
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return snprintf(buf, size, "v%d", priv->revision);
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}
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static const struct soc_ops soc_xilinx_versal_net_ops = {
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.get_family = soc_xilinx_versal_net_get_family,
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.get_revision = soc_xilinx_versal_net_get_revision,
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};
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static int soc_xilinx_versal_net_probe(struct udevice *dev)
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{
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struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev);
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u32 ret_payload[PAYLOAD_ARG_CNT];
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int ret;
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priv->family = versal_family;
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if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
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ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
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ret_payload);
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if (ret)
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return ret;
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} else {
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ret_payload[2] = readl(PMC_TAP_VERSION);
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if (!ret_payload[2])
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return -EINVAL;
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}
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priv->revision = FIELD_GET(PS_VERSION_MASK, ret_payload[2]);
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return 0;
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}
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U_BOOT_DRIVER(soc_xilinx_versal_net) = {
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.name = "soc_xilinx_versal_net",
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.id = UCLASS_SOC,
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.ops = &soc_xilinx_versal_net_ops,
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.probe = soc_xilinx_versal_net_probe,
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.priv_auto = sizeof(struct soc_xilinx_versal_net_priv),
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.flags = DM_FLAG_PRE_RELOC,
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};
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