[linux-2.6-block.git] / drivers / soc / amlogic / meson-gx-socinfo.c

/*
 * Copyright (c) 2017 BayLibre, SAS
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 *
 * SPDX-License-Identifier: GPL-2.0+
 */

#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <linux/bitfield.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>

#define AO_SEC_SD_CFG8		0xe0
#define AO_SEC_SOCINFO_OFFSET	AO_SEC_SD_CFG8

#define SOCINFO_MAJOR	GENMASK(31, 24)
#define SOCINFO_PACK	GENMASK(23, 16)
#define SOCINFO_MINOR	GENMASK(15, 8)
#define SOCINFO_MISC	GENMASK(7, 0)

static const struct meson_gx_soc_id {
	const char *name;
	unsigned int id;
} soc_ids[] = {
	{ "GXBB", 0x1f },
	{ "GXTVBB", 0x20 },
	{ "GXL", 0x21 },
	{ "GXM", 0x22 },
	{ "TXL", 0x23 },
	{ "TXLX", 0x24 },
	{ "AXG", 0x25 },
	{ "GXLX", 0x26 },
	{ "TXHD", 0x27 },
	{ "G12A", 0x28 },
	{ "G12B", 0x29 },
};

static const struct meson_gx_package_id {
	const char *name;
	unsigned int major_id;
	unsigned int pack_id;
	unsigned int pack_mask;
} soc_packages[] = {
	{ "S905", 0x1f, 0, 0x20 }, /* pack_id != 0x20 */
	{ "S905H", 0x1f, 0x3, 0xf }, /* pack_id & 0xf == 0x3 */
	{ "S905M", 0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */
	{ "S905D", 0x21, 0, 0xf0 },
	{ "S905X", 0x21, 0x80, 0xf0 },
	{ "S905W", 0x21, 0xa0, 0xf0 },
	{ "S905L", 0x21, 0xc0, 0xf0 },
	{ "S905M2", 0x21, 0xe0, 0xf0 },
	{ "S805X", 0x21, 0x30, 0xf0 },
	{ "S805Y", 0x21, 0xb0, 0xf0 },
	{ "S912", 0x22, 0, 0x0 }, /* Only S912 is known for GXM */
	{ "962X", 0x24, 0x10, 0xf0 },
	{ "962E", 0x24, 0x20, 0xf0 },
	{ "A113X", 0x25, 0x37, 0xff },
	{ "A113D", 0x25, 0x22, 0xff },
	{ "S905D2", 0x28, 0x10, 0xf0 },
	{ "S905X2", 0x28, 0x40, 0xf0 },
	{ "S922X", 0x29, 0x40, 0xf0 },
};

static inline unsigned int socinfo_to_major(u32 socinfo)
{
	return FIELD_GET(SOCINFO_MAJOR, socinfo);
}

static inline unsigned int socinfo_to_minor(u32 socinfo)
{
	return FIELD_GET(SOCINFO_MINOR, socinfo);
}

static inline unsigned int socinfo_to_pack(u32 socinfo)
{
	return FIELD_GET(SOCINFO_PACK, socinfo);
}

static inline unsigned int socinfo_to_misc(u32 socinfo)
{
	return FIELD_GET(SOCINFO_MISC, socinfo);
}

static const char *socinfo_to_package_id(u32 socinfo)
{
	unsigned int pack = socinfo_to_pack(socinfo);
	unsigned int major = socinfo_to_major(socinfo);
	int i;

	for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) {
		if (soc_packages[i].major_id == major &&
		    soc_packages[i].pack_id ==
				(pack & soc_packages[i].pack_mask))
			return soc_packages[i].name;
	}

	return "Unknown";
}

static const char *socinfo_to_soc_id(u32 socinfo)
{
	unsigned int id = socinfo_to_major(socinfo);
	int i;

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

	return "Unknown";
}

static int __init meson_gx_socinfo_init(void)
{
	struct soc_device_attribute *soc_dev_attr;
	struct soc_device *soc_dev;
	struct device_node *np;
	struct regmap *regmap;
	unsigned int socinfo;
	struct device *dev;
	int ret;

	/* look up for chipid node */
	np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure");
	if (!np)
		return -ENODEV;

	/* check if interface is enabled */
	if (!of_device_is_available(np)) {
		of_node_put(np);
		return -ENODEV;
	}

	/* check if chip-id is available */
	if (!of_property_read_bool(np, "amlogic,has-chip-id"))
		return -ENODEV;

	/* node should be a syscon */
	regmap = syscon_node_to_regmap(np);
	of_node_put(np);
	if (IS_ERR(regmap)) {
		pr_err("%s: failed to get regmap\n", __func__);
		return -ENODEV;
	}

	ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo);
	if (ret < 0)
		return ret;

	if (!socinfo) {
		pr_err("%s: invalid chipid value\n", __func__);
		return -EINVAL;
	}

	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
	if (!soc_dev_attr)
		return -ENODEV;

	soc_dev_attr->family = "Amlogic Meson";

	np = of_find_node_by_path("/");
	of_property_read_string(np, "model", &soc_dev_attr->machine);
	of_node_put(np);

	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x",
					   socinfo_to_major(socinfo),
					   socinfo_to_minor(socinfo),
					   socinfo_to_pack(socinfo),
					   socinfo_to_misc(socinfo));
	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)",
					 socinfo_to_soc_id(socinfo),
					 socinfo_to_package_id(socinfo));

	soc_dev = soc_device_register(soc_dev_attr);
	if (IS_ERR(soc_dev)) {
		kfree(soc_dev_attr->revision);
		kfree_const(soc_dev_attr->soc_id);
		kfree(soc_dev_attr);
		return PTR_ERR(soc_dev);
	}
	dev = soc_device_to_device(soc_dev);

	dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected\n",
			soc_dev_attr->soc_id,
			socinfo_to_major(socinfo),
			socinfo_to_minor(socinfo),
			socinfo_to_pack(socinfo),
			socinfo_to_misc(socinfo));

	return 0;
}
device_initcall(meson_gx_socinfo_init);
Commit	Line	Data
a9daaba2 NA	1	/*
	2	* Copyright (c) 2017 BayLibre, SAS
	3	* Author: Neil Armstrong <narmstrong@baylibre.com>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0+
	6	*/
	7
	8	#include <linux/io.h>
	9	#include <linux/of.h>
	10	#include <linux/of_address.h>
	11	#include <linux/of_platform.h>
	12	#include <linux/platform_device.h>
	13	#include <linux/slab.h>
	14	#include <linux/sys_soc.h>
	15	#include <linux/bitfield.h>
	16	#include <linux/regmap.h>
	17	#include <linux/mfd/syscon.h>
	18
	19	#define AO_SEC_SD_CFG8 0xe0
	20	#define AO_SEC_SOCINFO_OFFSET AO_SEC_SD_CFG8
	21
	22	#define SOCINFO_MAJOR GENMASK(31, 24)
044d71bc AP	23	#define SOCINFO_PACK GENMASK(23, 16)
044d71bc AP	24	#define SOCINFO_MINOR GENMASK(15, 8)
a9daaba2 NA	25	#define SOCINFO_MISC GENMASK(7, 0)
	26
	27	static const struct meson_gx_soc_id {
	28	const char *name;
	29	unsigned int id;
	30	} soc_ids[] = {
	31	{ "GXBB", 0x1f },
	32	{ "GXTVBB", 0x20 },
	33	{ "GXL", 0x21 },
	34	{ "GXM", 0x22 },
	35	{ "TXL", 0x23 },
f842c41a NA	36	{ "TXLX", 0x24 },
	37	{ "AXG", 0x25 },
	38	{ "GXLX", 0x26 },
	39	{ "TXHD", 0x27 },
65f80df5 NA	40	{ "G12A", 0x28 },
65f80df5 NA	41	{ "G12B", 0x29 },
a9daaba2 NA	42	};
	43
	44	static const struct meson_gx_package_id {
	45	const char *name;
	46	unsigned int major_id;
	47	unsigned int pack_id;
dce47aed	48	unsigned int pack_mask;
a9daaba2	49	} soc_packages[] = {
dce47aed NA	50	{ "S905", 0x1f, 0, 0x20 }, /* pack_id != 0x20 */
	51	{ "S905H", 0x1f, 0x3, 0xf }, /* pack_id & 0xf == 0x3 */
	52	{ "S905M", 0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */
	53	{ "S905D", 0x21, 0, 0xf0 },
	54	{ "S905X", 0x21, 0x80, 0xf0 },
	55	{ "S905W", 0x21, 0xa0, 0xf0 },
	56	{ "S905L", 0x21, 0xc0, 0xf0 },
	57	{ "S905M2", 0x21, 0xe0, 0xf0 },
65f80df5 NA	58	{ "S805X", 0x21, 0x30, 0xf0 },
65f80df5 NA	59	{ "S805Y", 0x21, 0xb0, 0xf0 },
dce47aed NA	60	{ "S912", 0x22, 0, 0x0 }, /* Only S912 is known for GXM */
	61	{ "962X", 0x24, 0x10, 0xf0 },
	62	{ "962E", 0x24, 0x20, 0xf0 },
	63	{ "A113X", 0x25, 0x37, 0xff },
	64	{ "A113D", 0x25, 0x22, 0xff },
65f80df5 NA	65	{ "S905D2", 0x28, 0x10, 0xf0 },
	66	{ "S905X2", 0x28, 0x40, 0xf0 },
	67	{ "S922X", 0x29, 0x40, 0xf0 },
a9daaba2 NA	68	};
	69
	70	static inline unsigned int socinfo_to_major(u32 socinfo)
	71	{
	72	return FIELD_GET(SOCINFO_MAJOR, socinfo);
	73	}
	74
	75	static inline unsigned int socinfo_to_minor(u32 socinfo)
	76	{
	77	return FIELD_GET(SOCINFO_MINOR, socinfo);
	78	}
	79
	80	static inline unsigned int socinfo_to_pack(u32 socinfo)
	81	{
	82	return FIELD_GET(SOCINFO_PACK, socinfo);
	83	}
	84
	85	static inline unsigned int socinfo_to_misc(u32 socinfo)
	86	{
	87	return FIELD_GET(SOCINFO_MISC, socinfo);
	88	}
	89
	90	static const char *socinfo_to_package_id(u32 socinfo)
	91	{
dce47aed	92	unsigned int pack = socinfo_to_pack(socinfo);
a9daaba2 NA	93	unsigned int major = socinfo_to_major(socinfo);
	94	int i;
	95
	96	for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) {
	97	if (soc_packages[i].major_id == major &&
dce47aed NA	98	soc_packages[i].pack_id ==
dce47aed NA	99	(pack & soc_packages[i].pack_mask))
a9daaba2 NA	100	return soc_packages[i].name;
	101	}
	102
	103	return "Unknown";
	104	}
	105
	106	static const char *socinfo_to_soc_id(u32 socinfo)
	107	{
	108	unsigned int id = socinfo_to_major(socinfo);
	109	int i;
	110
	111	for (i = 0 ; i < ARRAY_SIZE(soc_ids) ; ++i) {
	112	if (soc_ids[i].id == id)
	113	return soc_ids[i].name;
	114	}
	115
	116	return "Unknown";
	117	}
	118
01517dfc	119	static int __init meson_gx_socinfo_init(void)
a9daaba2 NA	120	{
	121	struct soc_device_attribute *soc_dev_attr;
	122	struct soc_device *soc_dev;
	123	struct device_node *np;
	124	struct regmap *regmap;
	125	unsigned int socinfo;
	126	struct device *dev;
	127	int ret;
	128
	129	/* look up for chipid node */
	130	np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure");
	131	if (!np)
	132	return -ENODEV;
	133
	134	/* check if interface is enabled */
fdda0a6a JL	135	if (!of_device_is_available(np)) {
fdda0a6a JL	136	of_node_put(np);
a9daaba2	137	return -ENODEV;
fdda0a6a	138	}
a9daaba2 NA	139
	140	/* check if chip-id is available */
	141	if (!of_property_read_bool(np, "amlogic,has-chip-id"))
	142	return -ENODEV;
	143
	144	/* node should be a syscon */
	145	regmap = syscon_node_to_regmap(np);
	146	of_node_put(np);
	147	if (IS_ERR(regmap)) {
	148	pr_err("%s: failed to get regmap\n", __func__);
	149	return -ENODEV;
	150	}
	151
	152	ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo);
	153	if (ret < 0)
	154	return ret;
	155
	156	if (!socinfo) {
	157	pr_err("%s: invalid chipid value\n", __func__);
	158	return -EINVAL;
	159	}
	160
	161	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
	162	if (!soc_dev_attr)
	163	return -ENODEV;
	164
	165	soc_dev_attr->family = "Amlogic Meson";
	166
	167	np = of_find_node_by_path("/");
	168	of_property_read_string(np, "model", &soc_dev_attr->machine);
	169	of_node_put(np);
	170
	171	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x",
	172	socinfo_to_major(socinfo),
	173	socinfo_to_minor(socinfo),
	174	socinfo_to_pack(socinfo),
	175	socinfo_to_misc(socinfo));
	176	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)",
	177	socinfo_to_soc_id(socinfo),
	178	socinfo_to_package_id(socinfo));
	179
	180	soc_dev = soc_device_register(soc_dev_attr);
	181	if (IS_ERR(soc_dev)) {
	182	kfree(soc_dev_attr->revision);
	183	kfree_const(soc_dev_attr->soc_id);
	184	kfree(soc_dev_attr);
	185	return PTR_ERR(soc_dev);
	186	}
	187	dev = soc_device_to_device(soc_dev);
	188
	189	dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected\n",
	190	soc_dev_attr->soc_id,
	191	socinfo_to_major(socinfo),
	192	socinfo_to_minor(socinfo),
	193	socinfo_to_pack(socinfo),
	194	socinfo_to_misc(socinfo));
	195
	196	return 0;
	197	}
	198	device_initcall(meson_gx_socinfo_init);