1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Freescale QorIQ Platforms GUTS Driver
4 *
5 * Copyright (C) 2016 Freescale Semiconductor, Inc.
6 */
7
8#include <linux/io.h>
9#include <linux/slab.h>
10#include <linux/module.h>
11#include <linux/of_fdt.h>
12#include <linux/sys_soc.h>
13#include <linux/of_address.h>
14#include <linux/platform_device.h>
15#include <linux/fsl/guts.h>
16
17struct fsl_soc_die_attr {
18	char	*die;
19	u32	svr;
20	u32	mask;
21};
22
23struct fsl_soc_data {
24	const char *sfp_compat;
25	u32 uid_offset;
26};
27
28/* SoC die attribute definition for QorIQ platform */
29static const struct fsl_soc_die_attr fsl_soc_die[] = {
30	/*
31	 * Power Architecture-based SoCs T Series
32	 */
33
34	/* Die: T4240, SoC: T4240/T4160/T4080 */
35	{ .die		= "T4240",
36	  .svr		= 0x82400000,
37	  .mask		= 0xfff00000,
38	},
39	/* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
40	{ .die		= "T1040",
41	  .svr		= 0x85200000,
42	  .mask		= 0xfff00000,
43	},
44	/* Die: T2080, SoC: T2080/T2081 */
45	{ .die		= "T2080",
46	  .svr		= 0x85300000,
47	  .mask		= 0xfff00000,
48	},
49	/* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
50	{ .die		= "T1024",
51	  .svr		= 0x85400000,
52	  .mask		= 0xfff00000,
53	},
54
55	/*
56	 * ARM-based SoCs LS Series
57	 */
58
59	/* Die: LS1043A, SoC: LS1043A/LS1023A */
60	{ .die		= "LS1043A",
61	  .svr		= 0x87920000,
62	  .mask		= 0xffff0000,
63	},
64	/* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
65	{ .die		= "LS2080A",
66	  .svr		= 0x87010000,
67	  .mask		= 0xff3f0000,
68	},
69	/* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
70	{ .die		= "LS1088A",
71	  .svr		= 0x87030000,
72	  .mask		= 0xff3f0000,
73	},
74	/* Die: LS1012A, SoC: LS1012A */
75	{ .die		= "LS1012A",
76	  .svr		= 0x87040000,
77	  .mask		= 0xffff0000,
78	},
79	/* Die: LS1046A, SoC: LS1046A/LS1026A */
80	{ .die		= "LS1046A",
81	  .svr		= 0x87070000,
82	  .mask		= 0xffff0000,
83	},
84	/* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
85	{ .die		= "LS2088A",
86	  .svr		= 0x87090000,
87	  .mask		= 0xff3f0000,
88	},
89	/* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
90	{ .die		= "LS1021A",
91	  .svr		= 0x87000000,
92	  .mask		= 0xfff70000,
93	},
94	/* Die: LX2160A, SoC: LX2160A/LX2120A/LX2080A */
95	{ .die          = "LX2160A",
96	  .svr          = 0x87360000,
97	  .mask         = 0xff3f0000,
98	},
99	/* Die: LS1028A, SoC: LS1028A */
100	{ .die          = "LS1028A",
101	  .svr          = 0x870b0000,
102	  .mask         = 0xff3f0000,
103	},
104	{ },
105};
106
107static const struct fsl_soc_die_attr *fsl_soc_die_match(
108	u32 svr, const struct fsl_soc_die_attr *matches)
109{
110	while (matches->svr) {
111		if (matches->svr == (svr & matches->mask))
112			return matches;
113		matches++;
114	}
115	return NULL;
116}
117
118static u64 fsl_guts_get_soc_uid(const char *compat, unsigned int offset)
119{
120	struct device_node *np;
121	void __iomem *sfp_base;
122	u64 uid;
123
124	np = of_find_compatible_node(NULL, NULL, compat);
125	if (!np)
126		return 0;
127
128	sfp_base = of_iomap(np, 0);
129	if (!sfp_base) {
130		of_node_put(np);
131		return 0;
132	}
133
134	uid = ioread32(sfp_base + offset);
135	uid <<= 32;
136	uid |= ioread32(sfp_base + offset + 4);
137
138	iounmap(sfp_base);
139	of_node_put(np);
140
141	return uid;
142}
143
144static const struct fsl_soc_data ls1028a_data = {
145	.sfp_compat = "fsl,ls1028a-sfp",
146	.uid_offset = 0x21c,
147};
148
149/*
150 * Table for matching compatible strings, for device tree
151 * guts node, for Freescale QorIQ SOCs.
152 */
153static const struct of_device_id fsl_guts_of_match[] = {
154	{ .compatible = "fsl,qoriq-device-config-1.0", },
155	{ .compatible = "fsl,qoriq-device-config-2.0", },
156	{ .compatible = "fsl,p1010-guts", },
157	{ .compatible = "fsl,p1020-guts", },
158	{ .compatible = "fsl,p1021-guts", },
159	{ .compatible = "fsl,p1022-guts", },
160	{ .compatible = "fsl,p1023-guts", },
161	{ .compatible = "fsl,p2020-guts", },
162	{ .compatible = "fsl,bsc9131-guts", },
163	{ .compatible = "fsl,bsc9132-guts", },
164	{ .compatible = "fsl,mpc8536-guts", },
165	{ .compatible = "fsl,mpc8544-guts", },
166	{ .compatible = "fsl,mpc8548-guts", },
167	{ .compatible = "fsl,mpc8568-guts", },
168	{ .compatible = "fsl,mpc8569-guts", },
169	{ .compatible = "fsl,mpc8572-guts", },
170	{ .compatible = "fsl,ls1021a-dcfg", },
171	{ .compatible = "fsl,ls1043a-dcfg", },
172	{ .compatible = "fsl,ls2080a-dcfg", },
173	{ .compatible = "fsl,ls1088a-dcfg", },
174	{ .compatible = "fsl,ls1012a-dcfg", },
175	{ .compatible = "fsl,ls1046a-dcfg", },
176	{ .compatible = "fsl,lx2160a-dcfg", },
177	{ .compatible = "fsl,ls1028a-dcfg", .data = &ls1028a_data},
178	{}
179};
180
181static int __init fsl_guts_init(void)
182{
183	struct soc_device_attribute *soc_dev_attr;
184	static struct soc_device *soc_dev;
185	const struct fsl_soc_die_attr *soc_die;
186	const struct fsl_soc_data *soc_data;
187	const struct of_device_id *match;
188	struct ccsr_guts __iomem *regs;
189	const char *machine = NULL;
190	struct device_node *np;
191	bool little_endian;
192	u64 soc_uid = 0;
193	u32 svr;
194	int ret;
195
196	np = of_find_matching_node_and_match(NULL, fsl_guts_of_match, &match);
197	if (!np)
198		return 0;
199	soc_data = match->data;
200
201	regs = of_iomap(np, 0);
202	if (!regs) {
203		of_node_put(np);
204		return -ENOMEM;
205	}
206
207	little_endian = of_property_read_bool(np, "little-endian");
208	if (little_endian)
209		svr = ioread32(&regs->svr);
210	else
211		svr = ioread32be(&regs->svr);
212	iounmap(regs);
213	of_node_put(np);
214
215	/* Register soc device */
216	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
217	if (!soc_dev_attr)
218		return -ENOMEM;
219
220	if (of_property_read_string(of_root, "model", &machine))
221		of_property_read_string_index(of_root, "compatible", 0, &machine);
222	if (machine) {
223		soc_dev_attr->machine = kstrdup(machine, GFP_KERNEL);
224		if (!soc_dev_attr->machine)
225			goto err_nomem;
226	}
227
228	soc_die = fsl_soc_die_match(svr, fsl_soc_die);
229	if (soc_die) {
230		soc_dev_attr->family = kasprintf(GFP_KERNEL, "QorIQ %s",
231						 soc_die->die);
232	} else {
233		soc_dev_attr->family = kasprintf(GFP_KERNEL, "QorIQ");
234	}
235	if (!soc_dev_attr->family)
236		goto err_nomem;
237
238	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "svr:0x%08x", svr);
239	if (!soc_dev_attr->soc_id)
240		goto err_nomem;
241
242	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
243					   (svr >>  4) & 0xf, svr & 0xf);
244	if (!soc_dev_attr->revision)
245		goto err_nomem;
246
247	if (soc_data)
248		soc_uid = fsl_guts_get_soc_uid(soc_data->sfp_compat,
249					       soc_data->uid_offset);
250	if (soc_uid)
251		soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX",
252							soc_uid);
253
254	soc_dev = soc_device_register(soc_dev_attr);
255	if (IS_ERR(soc_dev)) {
256		ret = PTR_ERR(soc_dev);
257		goto err;
258	}
259
260	pr_info("Machine: %s\n", soc_dev_attr->machine);
261	pr_info("SoC family: %s\n", soc_dev_attr->family);
262	pr_info("SoC ID: %s, Revision: %s\n",
263		soc_dev_attr->soc_id, soc_dev_attr->revision);
264
265	return 0;
266
267err_nomem:
268	ret = -ENOMEM;
269err:
270	kfree(soc_dev_attr->machine);
271	kfree(soc_dev_attr->family);
272	kfree(soc_dev_attr->soc_id);
273	kfree(soc_dev_attr->revision);
274	kfree(soc_dev_attr->serial_number);
275	kfree(soc_dev_attr);
276
277	return ret;
278}
279core_initcall(fsl_guts_init);
280