^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright 2020 Arm Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define pr_fmt(fmt) "SMCCC: SOC_ID: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/arm-smccc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/bitfield.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sys_soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define SMCCC_SOC_ID_JEP106_BANK_IDX_MASK GENMASK(30, 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * As per the SMC Calling Convention specification v1.2 (ARM DEN 0028C)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Section 7.4 SMCCC_ARCH_SOC_ID bits[23:16] are JEP-106 identification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * code with parity bit for the SiP. We can drop the parity bit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define SMCCC_SOC_ID_JEP106_ID_CODE_MASK GENMASK(22, 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define SMCCC_SOC_ID_IMP_DEF_SOC_ID_MASK GENMASK(15, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define JEP106_BANK_CONT_CODE(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) (u8)(FIELD_GET(SMCCC_SOC_ID_JEP106_BANK_IDX_MASK, (x)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define JEP106_ID_CODE(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) (u8)(FIELD_GET(SMCCC_SOC_ID_JEP106_ID_CODE_MASK, (x)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define IMP_DEF_SOC_ID(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) (u16)(FIELD_GET(SMCCC_SOC_ID_IMP_DEF_SOC_ID_MASK, (x)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static struct soc_device *soc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static struct soc_device_attribute *soc_dev_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int __init smccc_soc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct arm_smccc_res res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int soc_id_rev, soc_id_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static char soc_id_str[20], soc_id_rev_str[12];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static char soc_id_jep106_id_str[12];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (arm_smccc_1_1_get_conduit() == SMCCC_CONDUIT_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) pr_err("%s: invalid SMCCC conduit\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) ARM_SMCCC_ARCH_SOC_ID, &res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if ((int)res.a0 == SMCCC_RET_NOT_SUPPORTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) pr_info("ARCH_SOC_ID not implemented, skipping ....\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if ((int)res.a0 < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) pr_info("ARCH_FEATURES(ARCH_SOC_ID) returned error: %lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) res.a0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_SOC_ID, 0, &res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if ((int)res.a0 < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) pr_err("ARCH_SOC_ID(0) returned error: %lx\n", res.a0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) soc_id_version = res.a0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_SOC_ID, 1, &res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if ((int)res.a0 < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) pr_err("ARCH_SOC_ID(1) returned error: %lx\n", res.a0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) soc_id_rev = res.a0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (!soc_dev_attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) sprintf(soc_id_rev_str, "0x%08x", soc_id_rev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) sprintf(soc_id_jep106_id_str, "jep106:%02x%02x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) JEP106_BANK_CONT_CODE(soc_id_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) JEP106_ID_CODE(soc_id_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) sprintf(soc_id_str, "%s:%04x", soc_id_jep106_id_str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) IMP_DEF_SOC_ID(soc_id_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) soc_dev_attr->soc_id = soc_id_str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) soc_dev_attr->revision = soc_id_rev_str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) soc_dev_attr->family = soc_id_jep106_id_str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) soc_dev = soc_device_register(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (IS_ERR(soc_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) kfree(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return PTR_ERR(soc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pr_info("ID = %s Revision = %s\n", soc_dev_attr->soc_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) soc_dev_attr->revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) module_init(smccc_soc_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static void __exit smccc_soc_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (soc_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) soc_device_unregister(soc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) kfree(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) module_exit(smccc_soc_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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