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
17 struct guts {
18 struct ccsr_guts __iomem *regs;
19 bool little_endian;
20 };
21
22 struct fsl_soc_die_attr {
23 char *die;
24 u32 svr;
25 u32 mask;
26 };
27
28 static struct guts *guts;
29 static struct soc_device_attribute soc_dev_attr;
30 static struct soc_device *soc_dev;
31
32
33 /* SoC die attribute definition for QorIQ platform */
34 static const struct fsl_soc_die_attr fsl_soc_die[] = {
35 /*
36 * Power Architecture-based SoCs T Series
37 */
38
39 /* Die: T4240, SoC: T4240/T4160/T4080 */
40 { .die = "T4240",
41 .svr = 0x82400000,
42 .mask = 0xfff00000,
43 },
44 /* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
45 { .die = "T1040",
46 .svr = 0x85200000,
47 .mask = 0xfff00000,
48 },
49 /* Die: T2080, SoC: T2080/T2081 */
50 { .die = "T2080",
51 .svr = 0x85300000,
52 .mask = 0xfff00000,
53 },
54 /* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
55 { .die = "T1024",
56 .svr = 0x85400000,
57 .mask = 0xfff00000,
58 },
59
60 /*
61 * ARM-based SoCs LS Series
62 */
63
64 /* Die: LS1043A, SoC: LS1043A/LS1023A */
65 { .die = "LS1043A",
66 .svr = 0x87920000,
67 .mask = 0xffff0000,
68 },
69 /* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
70 { .die = "LS2080A",
71 .svr = 0x87010000,
72 .mask = 0xff3f0000,
73 },
74 /* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
75 { .die = "LS1088A",
76 .svr = 0x87030000,
77 .mask = 0xff3f0000,
78 },
79 /* Die: LS1012A, SoC: LS1012A */
80 { .die = "LS1012A",
81 .svr = 0x87040000,
82 .mask = 0xffff0000,
83 },
84 /* Die: LS1046A, SoC: LS1046A/LS1026A */
85 { .die = "LS1046A",
86 .svr = 0x87070000,
87 .mask = 0xffff0000,
88 },
89 /* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
90 { .die = "LS2088A",
91 .svr = 0x87090000,
92 .mask = 0xff3f0000,
93 },
94 /* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
95 { .die = "LS1021A",
96 .svr = 0x87000000,
97 .mask = 0xfff70000,
98 },
99 /* Die: LX2160A, SoC: LX2160A/LX2120A/LX2080A */
100 { .die = "LX2160A",
101 .svr = 0x87360000,
102 .mask = 0xff3f0000,
103 },
104 /* Die: LS1028A, SoC: LS1028A */
105 { .die = "LS1028A",
106 .svr = 0x870b0000,
107 .mask = 0xff3f0000,
108 },
109 { },
110 };
111
fsl_soc_die_match(u32 svr,const struct fsl_soc_die_attr * matches)112 static const struct fsl_soc_die_attr *fsl_soc_die_match(
113 u32 svr, const struct fsl_soc_die_attr *matches)
114 {
115 while (matches->svr) {
116 if (matches->svr == (svr & matches->mask))
117 return matches;
118 matches++;
119 }
120 return NULL;
121 }
122
fsl_guts_get_svr(void)123 static u32 fsl_guts_get_svr(void)
124 {
125 u32 svr = 0;
126
127 if (!guts || !guts->regs)
128 return svr;
129
130 if (guts->little_endian)
131 svr = ioread32(&guts->regs->svr);
132 else
133 svr = ioread32be(&guts->regs->svr);
134
135 return svr;
136 }
137
fsl_guts_probe(struct platform_device * pdev)138 static int fsl_guts_probe(struct platform_device *pdev)
139 {
140 struct device_node *root, *np = pdev->dev.of_node;
141 struct device *dev = &pdev->dev;
142 const struct fsl_soc_die_attr *soc_die;
143 const char *machine = NULL;
144 u32 svr;
145
146 /* Initialize guts */
147 guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
148 if (!guts)
149 return -ENOMEM;
150
151 guts->little_endian = of_property_read_bool(np, "little-endian");
152
153 guts->regs = devm_platform_ioremap_resource(pdev, 0);
154 if (IS_ERR(guts->regs))
155 return PTR_ERR(guts->regs);
156
157 /* Register soc device */
158 root = of_find_node_by_path("/");
159 if (of_property_read_string(root, "model", &machine))
160 of_property_read_string_index(root, "compatible", 0, &machine);
161 if (machine) {
162 soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
163 if (!soc_dev_attr.machine) {
164 of_node_put(root);
165 return -ENOMEM;
166 }
167 }
168 of_node_put(root);
169
170 svr = fsl_guts_get_svr();
171 soc_die = fsl_soc_die_match(svr, fsl_soc_die);
172 if (soc_die) {
173 soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
174 "QorIQ %s", soc_die->die);
175 } else {
176 soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ");
177 }
178 if (!soc_dev_attr.family)
179 return -ENOMEM;
180 soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL,
181 "svr:0x%08x", svr);
182 if (!soc_dev_attr.soc_id)
183 return -ENOMEM;
184 soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
185 (svr >> 4) & 0xf, svr & 0xf);
186 if (!soc_dev_attr.revision)
187 return -ENOMEM;
188
189 soc_dev = soc_device_register(&soc_dev_attr);
190 if (IS_ERR(soc_dev))
191 return PTR_ERR(soc_dev);
192
193 pr_info("Machine: %s\n", soc_dev_attr.machine);
194 pr_info("SoC family: %s\n", soc_dev_attr.family);
195 pr_info("SoC ID: %s, Revision: %s\n",
196 soc_dev_attr.soc_id, soc_dev_attr.revision);
197 return 0;
198 }
199
fsl_guts_remove(struct platform_device * dev)200 static int fsl_guts_remove(struct platform_device *dev)
201 {
202 soc_device_unregister(soc_dev);
203 return 0;
204 }
205
206 /*
207 * Table for matching compatible strings, for device tree
208 * guts node, for Freescale QorIQ SOCs.
209 */
210 static const struct of_device_id fsl_guts_of_match[] = {
211 { .compatible = "fsl,qoriq-device-config-1.0", },
212 { .compatible = "fsl,qoriq-device-config-2.0", },
213 { .compatible = "fsl,p1010-guts", },
214 { .compatible = "fsl,p1020-guts", },
215 { .compatible = "fsl,p1021-guts", },
216 { .compatible = "fsl,p1022-guts", },
217 { .compatible = "fsl,p1023-guts", },
218 { .compatible = "fsl,p2020-guts", },
219 { .compatible = "fsl,bsc9131-guts", },
220 { .compatible = "fsl,bsc9132-guts", },
221 { .compatible = "fsl,mpc8536-guts", },
222 { .compatible = "fsl,mpc8544-guts", },
223 { .compatible = "fsl,mpc8548-guts", },
224 { .compatible = "fsl,mpc8568-guts", },
225 { .compatible = "fsl,mpc8569-guts", },
226 { .compatible = "fsl,mpc8572-guts", },
227 { .compatible = "fsl,ls1021a-dcfg", },
228 { .compatible = "fsl,ls1043a-dcfg", },
229 { .compatible = "fsl,ls2080a-dcfg", },
230 { .compatible = "fsl,ls1088a-dcfg", },
231 { .compatible = "fsl,ls1012a-dcfg", },
232 { .compatible = "fsl,ls1046a-dcfg", },
233 { .compatible = "fsl,lx2160a-dcfg", },
234 { .compatible = "fsl,ls1028a-dcfg", },
235 {}
236 };
237 MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
238
239 static struct platform_driver fsl_guts_driver = {
240 .driver = {
241 .name = "fsl-guts",
242 .of_match_table = fsl_guts_of_match,
243 },
244 .probe = fsl_guts_probe,
245 .remove = fsl_guts_remove,
246 };
247
fsl_guts_init(void)248 static int __init fsl_guts_init(void)
249 {
250 return platform_driver_register(&fsl_guts_driver);
251 }
252 core_initcall(fsl_guts_init);
253
fsl_guts_exit(void)254 static void __exit fsl_guts_exit(void)
255 {
256 platform_driver_unregister(&fsl_guts_driver);
257 }
258 module_exit(fsl_guts_exit);
259