1*a24015faSAnson Huang // SPDX-License-Identifier: GPL-2.0 2*a24015faSAnson Huang /* 3*a24015faSAnson Huang * Copyright 2019 NXP. 4*a24015faSAnson Huang */ 5*a24015faSAnson Huang 6*a24015faSAnson Huang #include <dt-bindings/firmware/imx/rsrc.h> 7*a24015faSAnson Huang #include <linux/firmware/imx/sci.h> 8*a24015faSAnson Huang #include <linux/slab.h> 9*a24015faSAnson Huang #include <linux/sys_soc.h> 10*a24015faSAnson Huang #include <linux/platform_device.h> 11*a24015faSAnson Huang #include <linux/of.h> 12*a24015faSAnson Huang 13*a24015faSAnson Huang static struct imx_sc_ipc *imx_sc_soc_ipc_handle; 14*a24015faSAnson Huang 15*a24015faSAnson Huang struct imx_sc_msg_misc_get_soc_id { 16*a24015faSAnson Huang struct imx_sc_rpc_msg hdr; 17*a24015faSAnson Huang union { 18*a24015faSAnson Huang struct { 19*a24015faSAnson Huang u32 control; 20*a24015faSAnson Huang u16 resource; 21*a24015faSAnson Huang } __packed req; 22*a24015faSAnson Huang struct { 23*a24015faSAnson Huang u32 id; 24*a24015faSAnson Huang } resp; 25*a24015faSAnson Huang } data; 26*a24015faSAnson Huang } __packed __aligned(4); 27*a24015faSAnson Huang 28*a24015faSAnson Huang struct imx_sc_msg_misc_get_soc_uid { 29*a24015faSAnson Huang struct imx_sc_rpc_msg hdr; 30*a24015faSAnson Huang u32 uid_low; 31*a24015faSAnson Huang u32 uid_high; 32*a24015faSAnson Huang } __packed; 33*a24015faSAnson Huang 34*a24015faSAnson Huang static int imx_scu_soc_uid(u64 *soc_uid) 35*a24015faSAnson Huang { 36*a24015faSAnson Huang struct imx_sc_msg_misc_get_soc_uid msg; 37*a24015faSAnson Huang struct imx_sc_rpc_msg *hdr = &msg.hdr; 38*a24015faSAnson Huang int ret; 39*a24015faSAnson Huang 40*a24015faSAnson Huang hdr->ver = IMX_SC_RPC_VERSION; 41*a24015faSAnson Huang hdr->svc = IMX_SC_RPC_SVC_MISC; 42*a24015faSAnson Huang hdr->func = IMX_SC_MISC_FUNC_UNIQUE_ID; 43*a24015faSAnson Huang hdr->size = 1; 44*a24015faSAnson Huang 45*a24015faSAnson Huang ret = imx_scu_call_rpc(imx_sc_soc_ipc_handle, &msg, true); 46*a24015faSAnson Huang if (ret) { 47*a24015faSAnson Huang pr_err("%s: get soc uid failed, ret %d\n", __func__, ret); 48*a24015faSAnson Huang return ret; 49*a24015faSAnson Huang } 50*a24015faSAnson Huang 51*a24015faSAnson Huang *soc_uid = msg.uid_high; 52*a24015faSAnson Huang *soc_uid <<= 32; 53*a24015faSAnson Huang *soc_uid |= msg.uid_low; 54*a24015faSAnson Huang 55*a24015faSAnson Huang return 0; 56*a24015faSAnson Huang } 57*a24015faSAnson Huang 58*a24015faSAnson Huang static int imx_scu_soc_id(void) 59*a24015faSAnson Huang { 60*a24015faSAnson Huang struct imx_sc_msg_misc_get_soc_id msg; 61*a24015faSAnson Huang struct imx_sc_rpc_msg *hdr = &msg.hdr; 62*a24015faSAnson Huang int ret; 63*a24015faSAnson Huang 64*a24015faSAnson Huang hdr->ver = IMX_SC_RPC_VERSION; 65*a24015faSAnson Huang hdr->svc = IMX_SC_RPC_SVC_MISC; 66*a24015faSAnson Huang hdr->func = IMX_SC_MISC_FUNC_GET_CONTROL; 67*a24015faSAnson Huang hdr->size = 3; 68*a24015faSAnson Huang 69*a24015faSAnson Huang msg.data.req.control = IMX_SC_C_ID; 70*a24015faSAnson Huang msg.data.req.resource = IMX_SC_R_SYSTEM; 71*a24015faSAnson Huang 72*a24015faSAnson Huang ret = imx_scu_call_rpc(imx_sc_soc_ipc_handle, &msg, true); 73*a24015faSAnson Huang if (ret) { 74*a24015faSAnson Huang pr_err("%s: get soc info failed, ret %d\n", __func__, ret); 75*a24015faSAnson Huang return ret; 76*a24015faSAnson Huang } 77*a24015faSAnson Huang 78*a24015faSAnson Huang return msg.data.resp.id; 79*a24015faSAnson Huang } 80*a24015faSAnson Huang 81*a24015faSAnson Huang int imx_scu_soc_init(struct device *dev) 82*a24015faSAnson Huang { 83*a24015faSAnson Huang struct soc_device_attribute *soc_dev_attr; 84*a24015faSAnson Huang struct soc_device *soc_dev; 85*a24015faSAnson Huang int id, ret; 86*a24015faSAnson Huang u64 uid = 0; 87*a24015faSAnson Huang u32 val; 88*a24015faSAnson Huang 89*a24015faSAnson Huang ret = imx_scu_get_handle(&imx_sc_soc_ipc_handle); 90*a24015faSAnson Huang if (ret) 91*a24015faSAnson Huang return ret; 92*a24015faSAnson Huang 93*a24015faSAnson Huang soc_dev_attr = devm_kzalloc(dev, sizeof(*soc_dev_attr), 94*a24015faSAnson Huang GFP_KERNEL); 95*a24015faSAnson Huang if (!soc_dev_attr) 96*a24015faSAnson Huang return -ENOMEM; 97*a24015faSAnson Huang 98*a24015faSAnson Huang soc_dev_attr->family = "Freescale i.MX"; 99*a24015faSAnson Huang 100*a24015faSAnson Huang ret = of_property_read_string(of_root, 101*a24015faSAnson Huang "model", 102*a24015faSAnson Huang &soc_dev_attr->machine); 103*a24015faSAnson Huang if (ret) 104*a24015faSAnson Huang return ret; 105*a24015faSAnson Huang 106*a24015faSAnson Huang id = imx_scu_soc_id(); 107*a24015faSAnson Huang if (id < 0) 108*a24015faSAnson Huang return -EINVAL; 109*a24015faSAnson Huang 110*a24015faSAnson Huang ret = imx_scu_soc_uid(&uid); 111*a24015faSAnson Huang if (ret < 0) 112*a24015faSAnson Huang return -EINVAL; 113*a24015faSAnson Huang 114*a24015faSAnson Huang /* format soc_id value passed from SCU firmware */ 115*a24015faSAnson Huang val = id & 0x1f; 116*a24015faSAnson Huang soc_dev_attr->soc_id = devm_kasprintf(dev, GFP_KERNEL, "0x%x", val); 117*a24015faSAnson Huang if (!soc_dev_attr->soc_id) 118*a24015faSAnson Huang return -ENOMEM; 119*a24015faSAnson Huang 120*a24015faSAnson Huang /* format revision value passed from SCU firmware */ 121*a24015faSAnson Huang val = (id >> 5) & 0xf; 122*a24015faSAnson Huang val = (((val >> 2) + 1) << 4) | (val & 0x3); 123*a24015faSAnson Huang soc_dev_attr->revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d", 124*a24015faSAnson Huang (val >> 4) & 0xf, val & 0xf); 125*a24015faSAnson Huang if (!soc_dev_attr->revision) 126*a24015faSAnson Huang return -ENOMEM; 127*a24015faSAnson Huang 128*a24015faSAnson Huang soc_dev_attr->serial_number = devm_kasprintf(dev, GFP_KERNEL, 129*a24015faSAnson Huang "%016llX", uid); 130*a24015faSAnson Huang if (!soc_dev_attr->serial_number) 131*a24015faSAnson Huang return -ENOMEM; 132*a24015faSAnson Huang 133*a24015faSAnson Huang soc_dev = soc_device_register(soc_dev_attr); 134*a24015faSAnson Huang if (IS_ERR(soc_dev)) 135*a24015faSAnson Huang return PTR_ERR(soc_dev); 136*a24015faSAnson Huang 137*a24015faSAnson Huang return 0; 138*a24015faSAnson Huang } 139