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