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 { }, 101 }; 102 103 static const struct fsl_soc_die_attr *fsl_soc_die_match( 104 u32 svr, const struct fsl_soc_die_attr *matches) 105 { 106 while (matches->svr) { 107 if (matches->svr == (svr & matches->mask)) 108 return matches; 109 matches++; 110 }; 111 return NULL; 112 } 113 114 static u32 fsl_guts_get_svr(void) 115 { 116 u32 svr = 0; 117 118 if (!guts || !guts->regs) 119 return svr; 120 121 if (guts->little_endian) 122 svr = ioread32(&guts->regs->svr); 123 else 124 svr = ioread32be(&guts->regs->svr); 125 126 return svr; 127 } 128 129 static int fsl_guts_probe(struct platform_device *pdev) 130 { 131 struct device_node *np = pdev->dev.of_node; 132 struct device *dev = &pdev->dev; 133 struct resource *res; 134 const struct fsl_soc_die_attr *soc_die; 135 const char *machine; 136 u32 svr; 137 138 /* Initialize guts */ 139 guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL); 140 if (!guts) 141 return -ENOMEM; 142 143 guts->little_endian = of_property_read_bool(np, "little-endian"); 144 145 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 146 guts->regs = devm_ioremap_resource(dev, res); 147 if (IS_ERR(guts->regs)) 148 return PTR_ERR(guts->regs); 149 150 /* Register soc device */ 151 root = of_find_node_by_path("/"); 152 if (of_property_read_string(root, "model", &machine)) 153 of_property_read_string_index(root, "compatible", 0, &machine); 154 if (machine) 155 soc_dev_attr.machine = machine; 156 157 svr = fsl_guts_get_svr(); 158 soc_die = fsl_soc_die_match(svr, fsl_soc_die); 159 if (soc_die) { 160 soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, 161 "QorIQ %s", soc_die->die); 162 } else { 163 soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ"); 164 } 165 if (!soc_dev_attr.family) 166 return -ENOMEM; 167 soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL, 168 "svr:0x%08x", svr); 169 if (!soc_dev_attr.soc_id) 170 return -ENOMEM; 171 soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d", 172 (svr >> 4) & 0xf, svr & 0xf); 173 if (!soc_dev_attr.revision) 174 return -ENOMEM; 175 176 soc_dev = soc_device_register(&soc_dev_attr); 177 if (IS_ERR(soc_dev)) 178 return PTR_ERR(soc_dev); 179 180 pr_info("Machine: %s\n", soc_dev_attr.machine); 181 pr_info("SoC family: %s\n", soc_dev_attr.family); 182 pr_info("SoC ID: %s, Revision: %s\n", 183 soc_dev_attr.soc_id, soc_dev_attr.revision); 184 return 0; 185 } 186 187 static int fsl_guts_remove(struct platform_device *dev) 188 { 189 soc_device_unregister(soc_dev); 190 of_node_put(root); 191 return 0; 192 } 193 194 /* 195 * Table for matching compatible strings, for device tree 196 * guts node, for Freescale QorIQ SOCs. 197 */ 198 static const struct of_device_id fsl_guts_of_match[] = { 199 { .compatible = "fsl,qoriq-device-config-1.0", }, 200 { .compatible = "fsl,qoriq-device-config-2.0", }, 201 { .compatible = "fsl,p1010-guts", }, 202 { .compatible = "fsl,p1020-guts", }, 203 { .compatible = "fsl,p1021-guts", }, 204 { .compatible = "fsl,p1022-guts", }, 205 { .compatible = "fsl,p1023-guts", }, 206 { .compatible = "fsl,p2020-guts", }, 207 { .compatible = "fsl,bsc9131-guts", }, 208 { .compatible = "fsl,bsc9132-guts", }, 209 { .compatible = "fsl,mpc8536-guts", }, 210 { .compatible = "fsl,mpc8544-guts", }, 211 { .compatible = "fsl,mpc8548-guts", }, 212 { .compatible = "fsl,mpc8568-guts", }, 213 { .compatible = "fsl,mpc8569-guts", }, 214 { .compatible = "fsl,mpc8572-guts", }, 215 { .compatible = "fsl,ls1021a-dcfg", }, 216 { .compatible = "fsl,ls1043a-dcfg", }, 217 { .compatible = "fsl,ls2080a-dcfg", }, 218 { .compatible = "fsl,ls1088a-dcfg", }, 219 { .compatible = "fsl,ls1012a-dcfg", }, 220 { .compatible = "fsl,ls1046a-dcfg", }, 221 {} 222 }; 223 MODULE_DEVICE_TABLE(of, fsl_guts_of_match); 224 225 static struct platform_driver fsl_guts_driver = { 226 .driver = { 227 .name = "fsl-guts", 228 .of_match_table = fsl_guts_of_match, 229 }, 230 .probe = fsl_guts_probe, 231 .remove = fsl_guts_remove, 232 }; 233 234 static int __init fsl_guts_init(void) 235 { 236 return platform_driver_register(&fsl_guts_driver); 237 } 238 core_initcall(fsl_guts_init); 239 240 static void __exit fsl_guts_exit(void) 241 { 242 platform_driver_unregister(&fsl_guts_driver); 243 } 244 module_exit(fsl_guts_exit); 245