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 }; 111 112 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 } 122 123 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 } 137 138 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; 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 } 199 200 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 }; 247 248 static int __init fsl_guts_init(void) 249 { 250 return platform_driver_register(&fsl_guts_driver); 251 } 252 core_initcall(fsl_guts_init); 253 254 static void __exit fsl_guts_exit(void) 255 { 256 platform_driver_unregister(&fsl_guts_driver); 257 } 258 module_exit(fsl_guts_exit); 259