^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) ST-Ericsson SA 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sys_soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/cputype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/mach/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * struct dbx500_asic_id - fields of the ASIC ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * @process: the manufacturing process, 0x40 is 40 nm 0x00 is "standard"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * @partnumber: hithereto 0x8500 for DB8500
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * @revision: version code in the series
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct dbx500_asic_id {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) u16 partnumber;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) u8 revision;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u8 process;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static struct dbx500_asic_id dbx500_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static unsigned int __init ux500_read_asicid(phys_addr_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) void __iomem *virt = ioremap(addr, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int asicid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (!virt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) asicid = readl(virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) iounmap(virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return asicid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void ux500_print_soc_info(unsigned int asicid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned int rev = dbx500_id.revision;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) pr_info("DB%4x ", dbx500_id.partnumber);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (rev == 0x01)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) pr_cont("Early Drop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else if (rev >= 0xA0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) pr_cont("v%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) pr_cont("Unknown");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) pr_cont(" [%#010x]\n", asicid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static unsigned int partnumber(unsigned int asicid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return (asicid >> 8) & 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * SOC MIDR ASICID ADDRESS ASICID VALUE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * DB8500ed 0x410fc090 0x9001FFF4 0x00850001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * DB8500v1 0x411fc091 0x9001FFF4 0x008500A0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * DB8500v1.1 0x411fc091 0x9001FFF4 0x008500A1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * DB8500v2 0x412fc091 0x9001DBF4 0x008500B0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * DB8520v2.2 0x412fc091 0x9001DBF4 0x008500B2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * DB5500v1 0x412fc091 0x9001FFF4 0x005500A0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * DB9540 0x413fc090 0xFFFFDBF4 0x009540xx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static void __init ux500_setup_id(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned int cpuid = read_cpuid_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned int asicid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) phys_addr_t addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) switch (cpuid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) case 0x410fc090: /* DB8500ed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) case 0x411fc091: /* DB8500v1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) addr = 0x9001FFF4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) case 0x412fc091: /* DB8520 / DB8500v2 / DB5500v1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) asicid = ux500_read_asicid(0x9001DBF4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (partnumber(asicid) == 0x8500 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) partnumber(asicid) == 0x8520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /* DB8500v2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* DB5500v1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) addr = 0x9001FFF4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) case 0x413fc090: /* DB9540 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) addr = 0xFFFFDBF4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) asicid = ux500_read_asicid(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (!asicid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) pr_err("Unable to identify SoC\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) dbx500_id.process = asicid >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) dbx500_id.partnumber = partnumber(asicid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) dbx500_id.revision = asicid & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ux500_print_soc_info(asicid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static const char * __init ux500_get_machine(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return kasprintf(GFP_KERNEL, "DB%4x", dbx500_id.partnumber);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static const char * __init ux500_get_family(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return kasprintf(GFP_KERNEL, "ux500");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static const char * __init ux500_get_revision(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) unsigned int rev = dbx500_id.revision;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (rev == 0x01)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return kasprintf(GFP_KERNEL, "%s", "ED");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) else if (rev >= 0xA0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return kasprintf(GFP_KERNEL, "%d.%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) (rev >> 4) - 0xA + 1, rev & 0xf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return kasprintf(GFP_KERNEL, "%s", "Unknown");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) process_show(struct device *dev, struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (dbx500_id.process == 0x00)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return sprintf(buf, "Standard\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return sprintf(buf, "%02xnm\n", dbx500_id.process);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static DEVICE_ATTR_RO(process);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static struct attribute *ux500_soc_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) &dev_attr_process.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ATTRIBUTE_GROUPS(ux500_soc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static const char *db8500_read_soc_id(struct device_node *backupram)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) void __iomem *base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) void __iomem *uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) const char *retstr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) base = of_iomap(backupram, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (!base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) uid = base + 0x1fc0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* Throw these device-specific numbers into the entropy pool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) add_device_randomness(uid, 0x14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) retstr = kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) readl((u32 *)uid+0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) readl((u32 *)uid+1), readl((u32 *)uid+2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) readl((u32 *)uid+3), readl((u32 *)uid+4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) iounmap(base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return retstr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct device_node *backupram)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) soc_dev_attr->soc_id = db8500_read_soc_id(backupram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) soc_dev_attr->machine = ux500_get_machine();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) soc_dev_attr->family = ux500_get_family();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) soc_dev_attr->revision = ux500_get_revision();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) soc_dev_attr->custom_attr_group = ux500_soc_groups[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static int __init ux500_soc_device_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct soc_device *soc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct soc_device_attribute *soc_dev_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct device_node *backupram;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) backupram = of_find_compatible_node(NULL, NULL, "ste,dbx500-backupram");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!backupram)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) ux500_setup_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (!soc_dev_attr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) of_node_put(backupram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) soc_info_populate(soc_dev_attr, backupram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) of_node_put(backupram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) soc_dev = soc_device_register(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (IS_ERR(soc_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) kfree(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return PTR_ERR(soc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) subsys_initcall(ux500_soc_device_init);