linux_dsm_epyc7002/drivers/soc/qcom/socinfo.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2009-2017, The Linux Foundation. All rights reserved.
 * Copyright (c) 2017-2019, Linaro Ltd.
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smem.h>
#include <linux/string.h>
#include <linux/sys_soc.h>
#include <linux/types.h>

/*
 * SoC version type with major number in the upper 16 bits and minor
 * number in the lower 16 bits.
 */
#define SOCINFO_MAJOR(ver) (((ver) >> 16) & 0xffff)
#define SOCINFO_MINOR(ver) ((ver) & 0xffff)

#define SMEM_SOCINFO_BUILD_ID_LENGTH           32

/*
 * SMEM item id, used to acquire handles to respective
 * SMEM region.
 */
#define SMEM_HW_SW_BUILD_ID            137

/* Socinfo SMEM item structure */
struct socinfo {
	__le32 fmt;
	__le32 id;
	__le32 ver;
	char build_id[SMEM_SOCINFO_BUILD_ID_LENGTH];
	/* Version 2 */
	__le32 raw_id;
	__le32 raw_ver;
	/* Version 3 */
	__le32 hw_plat;
	/* Version 4 */
	__le32 plat_ver;
	/* Version 5 */
	__le32 accessory_chip;
	/* Version 6 */
	__le32 hw_plat_subtype;
	/* Version 7 */
	__le32 pmic_model;
	__le32 pmic_die_rev;
	/* Version 8 */
	__le32 pmic_model_1;
	__le32 pmic_die_rev_1;
	__le32 pmic_model_2;
	__le32 pmic_die_rev_2;
	/* Version 9 */
	__le32 foundry_id;
	/* Version 10 */
	__le32 serial_num;
	/* Version 11 */
	__le32 num_pmics;
	__le32 pmic_array_offset;
	/* Version 12 */
	__le32 chip_family;
	__le32 raw_device_family;
	__le32 raw_device_num;
};

struct qcom_socinfo {
	struct soc_device *soc_dev;
	struct soc_device_attribute attr;
};

struct soc_id {
	unsigned int id;
	const char *name;
};

static const struct soc_id soc_id[] = {
	{ 87, "MSM8960" },
	{ 109, "APQ8064" },
	{ 122, "MSM8660A" },
	{ 123, "MSM8260A" },
	{ 124, "APQ8060A" },
	{ 126, "MSM8974" },
	{ 130, "MPQ8064" },
	{ 138, "MSM8960AB" },
	{ 139, "APQ8060AB" },
	{ 140, "MSM8260AB" },
	{ 141, "MSM8660AB" },
	{ 178, "APQ8084" },
	{ 184, "APQ8074" },
	{ 185, "MSM8274" },
	{ 186, "MSM8674" },
	{ 194, "MSM8974PRO" },
	{ 206, "MSM8916" },
	{ 208, "APQ8074-AA" },
	{ 209, "APQ8074-AB" },
	{ 210, "APQ8074PRO" },
	{ 211, "MSM8274-AA" },
	{ 212, "MSM8274-AB" },
	{ 213, "MSM8274PRO" },
	{ 214, "MSM8674-AA" },
	{ 215, "MSM8674-AB" },
	{ 216, "MSM8674PRO" },
	{ 217, "MSM8974-AA" },
	{ 218, "MSM8974-AB" },
	{ 246, "MSM8996" },
	{ 247, "APQ8016" },
	{ 248, "MSM8216" },
	{ 249, "MSM8116" },
	{ 250, "MSM8616" },
	{ 291, "APQ8096" },
	{ 305, "MSM8996SG" },
	{ 310, "MSM8996AU" },
	{ 311, "APQ8096AU" },
	{ 312, "APQ8096SG" },
};

static const char *socinfo_machine(struct device *dev, unsigned int id)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(soc_id); idx++) {
		if (soc_id[idx].id == id)
			return soc_id[idx].name;
	}

	return NULL;
}

static int qcom_socinfo_probe(struct platform_device *pdev)
{
	struct qcom_socinfo *qs;
	struct socinfo *info;
	size_t item_size;

	info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID,
			      &item_size);
	if (IS_ERR(info)) {
		dev_err(&pdev->dev, "Couldn't find socinfo\n");
		return PTR_ERR(info);
	}

	qs = devm_kzalloc(&pdev->dev, sizeof(*qs), GFP_KERNEL);
	if (!qs)
		return -ENOMEM;

	qs->attr.family = "Snapdragon";
	qs->attr.machine = socinfo_machine(&pdev->dev,
					   le32_to_cpu(info->id));
	qs->attr.revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
					   SOCINFO_MAJOR(le32_to_cpu(info->ver)),
					   SOCINFO_MINOR(le32_to_cpu(info->ver)));
	if (offsetof(struct socinfo, serial_num) <= item_size)
		qs->attr.serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,
							"%u",
							le32_to_cpu(info->serial_num));

	qs->soc_dev = soc_device_register(&qs->attr);
	if (IS_ERR(qs->soc_dev))
		return PTR_ERR(qs->soc_dev);

	/* Feed the soc specific unique data into entropy pool */
	add_device_randomness(info, item_size);

	platform_set_drvdata(pdev, qs->soc_dev);

	return 0;
}

static int qcom_socinfo_remove(struct platform_device *pdev)
{
	struct qcom_socinfo *qs = platform_get_drvdata(pdev);

	soc_device_unregister(qs->soc_dev);

	return 0;
}

static struct platform_driver qcom_socinfo_driver = {
	.probe = qcom_socinfo_probe,
	.remove = qcom_socinfo_remove,
	.driver  = {
		.name = "qcom-socinfo",
	},
};

module_platform_driver(qcom_socinfo_driver);

MODULE_DESCRIPTION("Qualcomm SoCinfo driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:qcom-socinfo");