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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright 2019 NXP.4 */5 6#include <dt-bindings/firmware/imx/rsrc.h>7#include <linux/firmware/imx/sci.h>8#include <linux/slab.h>9#include <linux/sys_soc.h>10#include <linux/platform_device.h>11#include <linux/of.h>12 13static struct imx_sc_ipc *imx_sc_soc_ipc_handle;14 15struct imx_sc_msg_misc_get_soc_id {16 struct imx_sc_rpc_msg hdr;17 union {18 struct {19 u32 control;20 u16 resource;21 } __packed req;22 struct {23 u32 id;24 } resp;25 } data;26} __packed __aligned(4);27 28struct imx_sc_msg_misc_get_soc_uid {29 struct imx_sc_rpc_msg hdr;30 u32 uid_low;31 u32 uid_high;32} __packed;33 34static int imx_scu_soc_uid(u64 *soc_uid)35{36 struct imx_sc_msg_misc_get_soc_uid msg;37 struct imx_sc_rpc_msg *hdr = &msg.hdr;38 int ret;39 40 hdr->ver = IMX_SC_RPC_VERSION;41 hdr->svc = IMX_SC_RPC_SVC_MISC;42 hdr->func = IMX_SC_MISC_FUNC_UNIQUE_ID;43 hdr->size = 1;44 45 ret = imx_scu_call_rpc(imx_sc_soc_ipc_handle, &msg, true);46 if (ret) {47 pr_err("%s: get soc uid failed, ret %d\n", __func__, ret);48 return ret;49 }50 51 *soc_uid = msg.uid_high;52 *soc_uid <<= 32;53 *soc_uid |= msg.uid_low;54 55 return 0;56}57 58static int imx_scu_soc_id(void)59{60 struct imx_sc_msg_misc_get_soc_id msg;61 struct imx_sc_rpc_msg *hdr = &msg.hdr;62 int ret;63 64 hdr->ver = IMX_SC_RPC_VERSION;65 hdr->svc = IMX_SC_RPC_SVC_MISC;66 hdr->func = IMX_SC_MISC_FUNC_GET_CONTROL;67 hdr->size = 3;68 69 msg.data.req.control = IMX_SC_C_ID;70 msg.data.req.resource = IMX_SC_R_SYSTEM;71 72 ret = imx_scu_call_rpc(imx_sc_soc_ipc_handle, &msg, true);73 if (ret) {74 pr_err("%s: get soc info failed, ret %d\n", __func__, ret);75 return ret;76 }77 78 return msg.data.resp.id;79}80 81static const char *imx_scu_soc_name(u32 id)82{83 switch (id) {84 case 0x1:85 return "i.MX8QM";86 case 0x2:87 return "i.MX8QXP";88 case 0xe:89 return "i.MX8DXL";90 default:91 break;92 }93 94 return "NULL";95}96 97int imx_scu_soc_init(struct device *dev)98{99 struct soc_device_attribute *soc_dev_attr;100 struct soc_device *soc_dev;101 int id, ret;102 u64 uid = 0;103 u32 val;104 105 ret = imx_scu_get_handle(&imx_sc_soc_ipc_handle);106 if (ret)107 return ret;108 109 soc_dev_attr = devm_kzalloc(dev, sizeof(*soc_dev_attr),110 GFP_KERNEL);111 if (!soc_dev_attr)112 return -ENOMEM;113 114 soc_dev_attr->family = "Freescale i.MX";115 116 ret = of_property_read_string(of_root,117 "model",118 &soc_dev_attr->machine);119 if (ret)120 return ret;121 122 id = imx_scu_soc_id();123 if (id < 0)124 return -EINVAL;125 126 ret = imx_scu_soc_uid(&uid);127 if (ret < 0)128 return -EINVAL;129 130 /* format soc_id value passed from SCU firmware */131 val = id & 0x1f;132 soc_dev_attr->soc_id = imx_scu_soc_name(val);133 134 /* format revision value passed from SCU firmware */135 val = (id >> 5) & 0xf;136 val = (((val >> 2) + 1) << 4) | (val & 0x3);137 soc_dev_attr->revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",138 (val >> 4) & 0xf, val & 0xf);139 if (!soc_dev_attr->revision)140 return -ENOMEM;141 142 soc_dev_attr->serial_number = devm_kasprintf(dev, GFP_KERNEL,143 "%016llX", uid);144 if (!soc_dev_attr->serial_number)145 return -ENOMEM;146 147 soc_dev = soc_device_register(soc_dev_attr);148 if (IS_ERR(soc_dev))149 return PTR_ERR(soc_dev);150 151 return 0;152}153