139 lines
2.9 KiB
C
139 lines
2.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2019 NXP.
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*/
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#include <dt-bindings/firmware/imx/rsrc.h>
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#include <linux/firmware/imx/sci.h>
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#include <linux/slab.h>
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#include <linux/sys_soc.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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static struct imx_sc_ipc *imx_sc_soc_ipc_handle;
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struct imx_sc_msg_misc_get_soc_id {
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struct imx_sc_rpc_msg hdr;
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union {
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struct {
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u32 control;
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u16 resource;
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} __packed req;
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struct {
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u32 id;
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} resp;
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} data;
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} __packed __aligned(4);
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struct imx_sc_msg_misc_get_soc_uid {
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struct imx_sc_rpc_msg hdr;
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u32 uid_low;
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u32 uid_high;
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} __packed;
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static int imx_scu_soc_uid(u64 *soc_uid)
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{
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struct imx_sc_msg_misc_get_soc_uid msg;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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int ret;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = IMX_SC_RPC_SVC_MISC;
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hdr->func = IMX_SC_MISC_FUNC_UNIQUE_ID;
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hdr->size = 1;
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ret = imx_scu_call_rpc(imx_sc_soc_ipc_handle, &msg, true);
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if (ret) {
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pr_err("%s: get soc uid failed, ret %d\n", __func__, ret);
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return ret;
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}
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*soc_uid = msg.uid_high;
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*soc_uid <<= 32;
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*soc_uid |= msg.uid_low;
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return 0;
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}
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static int imx_scu_soc_id(void)
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{
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struct imx_sc_msg_misc_get_soc_id msg;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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int ret;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = IMX_SC_RPC_SVC_MISC;
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hdr->func = IMX_SC_MISC_FUNC_GET_CONTROL;
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hdr->size = 3;
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msg.data.req.control = IMX_SC_C_ID;
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msg.data.req.resource = IMX_SC_R_SYSTEM;
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ret = imx_scu_call_rpc(imx_sc_soc_ipc_handle, &msg, true);
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if (ret) {
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pr_err("%s: get soc info failed, ret %d\n", __func__, ret);
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return ret;
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}
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return msg.data.resp.id;
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}
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int imx_scu_soc_init(struct device *dev)
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{
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struct soc_device_attribute *soc_dev_attr;
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struct soc_device *soc_dev;
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int id, ret;
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u64 uid = 0;
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u32 val;
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ret = imx_scu_get_handle(&imx_sc_soc_ipc_handle);
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if (ret)
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return ret;
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soc_dev_attr = devm_kzalloc(dev, sizeof(*soc_dev_attr),
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GFP_KERNEL);
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if (!soc_dev_attr)
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return -ENOMEM;
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soc_dev_attr->family = "Freescale i.MX";
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ret = of_property_read_string(of_root,
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"model",
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&soc_dev_attr->machine);
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if (ret)
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return ret;
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id = imx_scu_soc_id();
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if (id < 0)
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return -EINVAL;
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ret = imx_scu_soc_uid(&uid);
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if (ret < 0)
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return -EINVAL;
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/* format soc_id value passed from SCU firmware */
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val = id & 0x1f;
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soc_dev_attr->soc_id = devm_kasprintf(dev, GFP_KERNEL, "0x%x", val);
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if (!soc_dev_attr->soc_id)
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return -ENOMEM;
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/* format revision value passed from SCU firmware */
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val = (id >> 5) & 0xf;
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val = (((val >> 2) + 1) << 4) | (val & 0x3);
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soc_dev_attr->revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
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(val >> 4) & 0xf, val & 0xf);
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if (!soc_dev_attr->revision)
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return -ENOMEM;
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soc_dev_attr->serial_number = devm_kasprintf(dev, GFP_KERNEL,
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"%016llX", uid);
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if (!soc_dev_attr->serial_number)
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return -ENOMEM;
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR(soc_dev))
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return PTR_ERR(soc_dev);
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return 0;
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}
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