drivers/firmware/imx/imx-scu-soc.c

Source file repositories/reference/linux-study-clean/drivers/firmware/imx/imx-scu-soc.c

File Facts

System
Linux kernel
Corpus path
drivers/firmware/imx/imx-scu-soc.c
Extension
.c
Size
3094 bytes
Lines
153
Domain
Driver Families
Bucket
drivers/firmware
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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;
}

static const char *imx_scu_soc_name(u32 id)
{
	switch (id) {
	case 0x1:
		return "i.MX8QM";
	case 0x2:
		return "i.MX8QXP";
	case 0xe:
		return "i.MX8DXL";
	default:
		break;
	}

	return "NULL";
}

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;

Annotation

Implementation Notes