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

#include <linux/debugfs.h>
#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 SOCINFO_VERSION(maj, min)  ((((maj) & 0xffff) << 16)|((min) & 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

#ifdef CONFIG_DEBUG_FS
#define SMEM_IMAGE_VERSION_BLOCKS_COUNT        32
#define SMEM_IMAGE_VERSION_SIZE                4096
#define SMEM_IMAGE_VERSION_NAME_SIZE           75
#define SMEM_IMAGE_VERSION_VARIANT_SIZE        20
#define SMEM_IMAGE_VERSION_OEM_SIZE            32

/*
 * SMEM Image table indices
 */
#define SMEM_IMAGE_TABLE_BOOT_INDEX     0
#define SMEM_IMAGE_TABLE_TZ_INDEX       1
#define SMEM_IMAGE_TABLE_RPM_INDEX      3
#define SMEM_IMAGE_TABLE_APPS_INDEX     10
#define SMEM_IMAGE_TABLE_MPSS_INDEX     11
#define SMEM_IMAGE_TABLE_ADSP_INDEX     12
#define SMEM_IMAGE_TABLE_CNSS_INDEX     13
#define SMEM_IMAGE_TABLE_VIDEO_INDEX    14
#define SMEM_IMAGE_VERSION_TABLE       469

/*
 * SMEM Image table names
 */
static const char *const socinfo_image_names[] = {
	[SMEM_IMAGE_TABLE_ADSP_INDEX] = "adsp",
	[SMEM_IMAGE_TABLE_APPS_INDEX] = "apps",
	[SMEM_IMAGE_TABLE_BOOT_INDEX] = "boot",
	[SMEM_IMAGE_TABLE_CNSS_INDEX] = "cnss",
	[SMEM_IMAGE_TABLE_MPSS_INDEX] = "mpss",
	[SMEM_IMAGE_TABLE_RPM_INDEX] = "rpm",
	[SMEM_IMAGE_TABLE_TZ_INDEX] = "tz",
	[SMEM_IMAGE_TABLE_VIDEO_INDEX] = "video",
};

static const char *const pmic_models[] = {
	[0]  = "Unknown PMIC model",
	[9]  = "PM8994",
	[11] = "PM8916",
	[13] = "PM8058",
	[14] = "PM8028",
	[15] = "PM8901",
	[16] = "PM8027",
	[17] = "ISL9519",
	[18] = "PM8921",
	[19] = "PM8018",
	[20] = "PM8015",
	[21] = "PM8014",
	[22] = "PM8821",
	[23] = "PM8038",
	[24] = "PM8922",
	[25] = "PM8917",
};
#endif /* CONFIG_DEBUG_FS */

/* 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;
};

#ifdef CONFIG_DEBUG_FS
struct socinfo_params {
	u32 raw_device_family;
	u32 hw_plat_subtype;
	u32 accessory_chip;
	u32 raw_device_num;
	u32 chip_family;
	u32 foundry_id;
	u32 plat_ver;
	u32 raw_ver;
	u32 hw_plat;
	u32 fmt;
};

struct smem_image_version {
	char name[SMEM_IMAGE_VERSION_NAME_SIZE];
	char variant[SMEM_IMAGE_VERSION_VARIANT_SIZE];
	char pad;
	char oem[SMEM_IMAGE_VERSION_OEM_SIZE];
};
#endif /* CONFIG_DEBUG_FS */

struct qcom_socinfo {
	struct soc_device *soc_dev;
	struct soc_device_attribute attr;
#ifdef CONFIG_DEBUG_FS
	struct dentry *dbg_root;
	struct socinfo_params info;
#endif /* CONFIG_DEBUG_FS */
};

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;
}

#ifdef CONFIG_DEBUG_FS

#define QCOM_OPEN(name, _func)						\
static int qcom_open_##name(struct inode *inode, struct file *file)	\
{									\
	return single_open(file, _func, inode->i_private);		\
}									\
									\
static const struct file_operations qcom_ ##name## _ops = {		\
	.open = qcom_open_##name,					\
	.read = seq_read,						\
	.llseek = seq_lseek,						\
	.release = single_release,					\
}

#define DEBUGFS_ADD(info, name)						\
	debugfs_create_file(__stringify(name), 0400,			\
			    qcom_socinfo->dbg_root,			\
			    info, &qcom_ ##name## _ops)


static int qcom_show_build_id(struct seq_file *seq, void *p)
{
	struct socinfo *socinfo = seq->private;

	seq_printf(seq, "%s\n", socinfo->build_id);

	return 0;
}

static int qcom_show_pmic_model(struct seq_file *seq, void *p)
{
	struct socinfo *socinfo = seq->private;
	int model = SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_model));

	if (model < 0)
		return -EINVAL;

	seq_printf(seq, "%s\n", pmic_models[model]);

	return 0;
}

static int qcom_show_pmic_die_revision(struct seq_file *seq, void *p)
{
	struct socinfo *socinfo = seq->private;

	seq_printf(seq, "%u.%u\n",
		   SOCINFO_MAJOR(le32_to_cpu(socinfo->pmic_die_rev)),
		   SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_die_rev)));

	return 0;
}

QCOM_OPEN(build_id, qcom_show_build_id);
QCOM_OPEN(pmic_model, qcom_show_pmic_model);
QCOM_OPEN(pmic_die_rev, qcom_show_pmic_die_revision);

#define DEFINE_IMAGE_OPS(type)					\
static int show_image_##type(struct seq_file *seq, void *p)		  \
{								  \
	struct smem_image_version *image_version = seq->private;  \
	seq_puts(seq, image_version->type);			  \
	seq_puts(seq, "\n");					  \
	return 0;						  \
}								  \
static int open_image_##type(struct inode *inode, struct file *file)	  \
{									  \
	return single_open(file, show_image_##type, inode->i_private); \
}									  \
									  \
static const struct file_operations qcom_image_##type##_ops = {	  \
	.open = open_image_##type,					  \
	.read = seq_read,						  \
	.llseek = seq_lseek,						  \
	.release = single_release,					  \
}

DEFINE_IMAGE_OPS(name);
DEFINE_IMAGE_OPS(variant);
DEFINE_IMAGE_OPS(oem);

static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
				 struct socinfo *info)
{
	struct smem_image_version *versions;
	struct dentry *dentry;
	size_t size;
	int i;

	qcom_socinfo->dbg_root = debugfs_create_dir("qcom_socinfo", NULL);

	qcom_socinfo->info.fmt = __le32_to_cpu(info->fmt);

	switch (qcom_socinfo->info.fmt) {
	case SOCINFO_VERSION(0, 12):
		qcom_socinfo->info.chip_family =
			__le32_to_cpu(info->chip_family);
		qcom_socinfo->info.raw_device_family =
			__le32_to_cpu(info->raw_device_family);
		qcom_socinfo->info.raw_device_num =
			__le32_to_cpu(info->raw_device_num);

		debugfs_create_x32("chip_family", 0400, qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.chip_family);
		debugfs_create_x32("raw_device_family", 0400,
				   qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.raw_device_family);
		debugfs_create_x32("raw_device_number", 0400,
				   qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.raw_device_num);
		/* Fall through */
	case SOCINFO_VERSION(0, 11):
	case SOCINFO_VERSION(0, 10):
	case SOCINFO_VERSION(0, 9):
		qcom_socinfo->info.foundry_id = __le32_to_cpu(info->foundry_id);

		debugfs_create_u32("foundry_id", 0400, qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.foundry_id);
		/* Fall through */
	case SOCINFO_VERSION(0, 8):
	case SOCINFO_VERSION(0, 7):
		DEBUGFS_ADD(info, pmic_model);
		DEBUGFS_ADD(info, pmic_die_rev);
		/* Fall through */
	case SOCINFO_VERSION(0, 6):
		qcom_socinfo->info.hw_plat_subtype =
			__le32_to_cpu(info->hw_plat_subtype);

		debugfs_create_u32("hardware_platform_subtype", 0400,
				   qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.hw_plat_subtype);
		/* Fall through */
	case SOCINFO_VERSION(0, 5):
		qcom_socinfo->info.accessory_chip =
			__le32_to_cpu(info->accessory_chip);

		debugfs_create_u32("accessory_chip", 0400,
				   qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.accessory_chip);
		/* Fall through */
	case SOCINFO_VERSION(0, 4):
		qcom_socinfo->info.plat_ver = __le32_to_cpu(info->plat_ver);

		debugfs_create_u32("platform_version", 0400,
				   qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.plat_ver);
		/* Fall through */
	case SOCINFO_VERSION(0, 3):
		qcom_socinfo->info.hw_plat = __le32_to_cpu(info->hw_plat);

		debugfs_create_u32("hardware_platform", 0400,
				   qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.hw_plat);
		/* Fall through */
	case SOCINFO_VERSION(0, 2):
		qcom_socinfo->info.raw_ver  = __le32_to_cpu(info->raw_ver);

		debugfs_create_u32("raw_version", 0400, qcom_socinfo->dbg_root,
				   &qcom_socinfo->info.raw_ver);
		/* Fall through */
	case SOCINFO_VERSION(0, 1):
		DEBUGFS_ADD(info, build_id);
		break;
	}

	versions = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_IMAGE_VERSION_TABLE,
				 &size);

	for (i = 0; i < ARRAY_SIZE(socinfo_image_names); i++) {
		if (!socinfo_image_names[i])
			continue;

		dentry = debugfs_create_dir(socinfo_image_names[i],
					    qcom_socinfo->dbg_root);
		debugfs_create_file("name", 0400, dentry, &versions[i],
				    &qcom_image_name_ops);
		debugfs_create_file("variant", 0400, dentry, &versions[i],
				    &qcom_image_variant_ops);
		debugfs_create_file("oem", 0400, dentry, &versions[i],
				    &qcom_image_oem_ops);
	}
}

static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo)
{
	debugfs_remove_recursive(qcom_socinfo->dbg_root);
}
#else
static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
				 struct socinfo *info)
{
}
static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo) {  }
#endif /* CONFIG_DEBUG_FS */

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.soc_id = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u",
					 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);

	socinfo_debugfs_init(qs, info);

	/* 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);

	socinfo_debugfs_exit(qs);

	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");