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