1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Xilinx Versal NET SOC driver 4 * 5 * Copyright (C) 2022, Advanced Micro Devices, Inc. 6 */ 7 8#include <common.h> 9#include <dm.h> 10#include <soc.h> 11#include <zynqmp_firmware.h> 12#include <asm/io.h> 13#include <asm/arch/hardware.h> 14 15#include <linux/bitfield.h> 16 17/* 18 * v1 -> 0x10 - ES1 19 * v2 -> 0x20 - Production 20 */ 21static const char versal_family[] = "Versal NET"; 22 23struct soc_xilinx_versal_net_priv { 24 const char *family; 25 char revision; 26}; 27 28static int soc_xilinx_versal_net_get_family(struct udevice *dev, char *buf, int size) 29{ 30 struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev); 31 32 return snprintf(buf, size, "%s", priv->family); 33} 34 35static int soc_xilinx_versal_net_get_revision(struct udevice *dev, char *buf, int size) 36{ 37 struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev); 38 39 return snprintf(buf, size, "v%d", priv->revision); 40} 41 42static const struct soc_ops soc_xilinx_versal_net_ops = { 43 .get_family = soc_xilinx_versal_net_get_family, 44 .get_revision = soc_xilinx_versal_net_get_revision, 45}; 46 47static int soc_xilinx_versal_net_probe(struct udevice *dev) 48{ 49 struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev); 50 u32 ret_payload[PAYLOAD_ARG_CNT]; 51 int ret; 52 53 priv->family = versal_family; 54 55 if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) { 56 ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0, 57 ret_payload); 58 if (ret) 59 return ret; 60 } else { 61 ret_payload[2] = readl(PMC_TAP_VERSION); 62 if (!ret_payload[2]) 63 return -EINVAL; 64 } 65 66 priv->revision = FIELD_GET(PS_VERSION_MASK, ret_payload[2]); 67 68 return 0; 69} 70 71U_BOOT_DRIVER(soc_xilinx_versal_net) = { 72 .name = "soc_xilinx_versal_net", 73 .id = UCLASS_SOC, 74 .ops = &soc_xilinx_versal_net_ops, 75 .probe = soc_xilinx_versal_net_probe, 76 .priv_auto = sizeof(struct soc_xilinx_versal_net_priv), 77 .flags = DM_FLAG_PRE_RELOC, 78}; 79