LXR uboot/drivers/soc/soc_xilinx

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Xilinx Versal SOC driver
   4 *
   5 * Copyright (C) 2021 Xilinx, 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/*
  16 * v1 -> 0x10 - ES1
  17 * v2 -> 0x20 - Production
  18 */
  19static const char versal_family[] = "Versal";
  20
  21struct soc_xilinx_versal_priv {
  22        const char *family;
  23        char revision;
  24};
  25
  26static int soc_xilinx_versal_get_family(struct udevice *dev, char *buf, int size)
  27{
  28        struct soc_xilinx_versal_priv *priv = dev_get_priv(dev);
  29
  30        return snprintf(buf, size, "%s", priv->family);
  31}
  32
  33static int soc_xilinx_versal_get_revision(struct udevice *dev, char *buf, int size)
  34{
  35        struct soc_xilinx_versal_priv *priv = dev_get_priv(dev);
  36
  37        return snprintf(buf, size, "v%d", priv->revision);
  38}
  39
  40static const struct soc_ops soc_xilinx_versal_ops = {
  41        .get_family = soc_xilinx_versal_get_family,
  42        .get_revision = soc_xilinx_versal_get_revision,
  43};
  44
  45static int soc_xilinx_versal_probe(struct udevice *dev)
  46{
  47        struct soc_xilinx_versal_priv *priv = dev_get_priv(dev);
  48        u32 ret_payload[4];
  49        int ret;
  50
  51        priv->family = versal_family;
  52
  53        if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
  54                ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
  55                                        ret_payload);
  56                if (ret)
  57                        return ret;
  58        } else {
  59                ret_payload[2] = readl(VERSAL_PS_PMC_VERSION);
  60                if (!ret_payload[2])
  61                        return -EINVAL;
  62        }
  63
  64        priv->revision = ret_payload[2] >> VERSAL_PS_VER_SHIFT;
  65
  66        return 0;
  67}
  68
  69U_BOOT_DRIVER(soc_xilinx_versal) = {
  70        .name           = "soc_xilinx_versal",
  71        .id             = UCLASS_SOC,
  72        .ops            = &soc_xilinx_versal_ops,
  73        .probe          = soc_xilinx_versal_probe,
  74        .priv_auto      = sizeof(struct soc_xilinx_versal_priv),
  75        .flags          = DM_FLAG_PRE_RELOC,
  76};
  77