154 lines
3.0 KiB
C
154 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Copyright 2019 IBM Corp. */
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/sys_soc.h>
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static struct {
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const char *name;
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const u32 id;
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} const rev_table[] = {
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/* AST2400 */
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{ "AST2400", 0x02000303 },
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{ "AST1400", 0x02010103 },
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{ "AST1250", 0x02010303 },
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/* AST2500 */
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{ "AST2500", 0x04000303 },
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{ "AST2510", 0x04000103 },
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{ "AST2520", 0x04000203 },
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{ "AST2530", 0x04000403 },
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/* AST2600 */
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{ "AST2600", 0x05000303 },
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{ "AST2620", 0x05010203 },
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{ "AST2605", 0x05030103 },
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{ "AST2625", 0x05030403 },
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};
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static const char *siliconid_to_name(u32 siliconid)
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{
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unsigned int id = siliconid & 0xff00ffff;
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unsigned int i;
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for (i = 0 ; i < ARRAY_SIZE(rev_table) ; ++i) {
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if (rev_table[i].id == id)
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return rev_table[i].name;
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}
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return "Unknown";
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}
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static const char *siliconid_to_rev(u32 siliconid)
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{
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unsigned int rev = (siliconid >> 16) & 0xff;
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unsigned int gen = (siliconid >> 24) & 0xff;
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if (gen < 0x5) {
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/* AST2500 and below */
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switch (rev) {
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case 0:
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return "A0";
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case 1:
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return "A1";
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case 3:
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return "A2";
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}
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} else {
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/* AST2600 */
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switch (rev) {
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case 0:
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return "A0";
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case 1:
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return "A1";
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case 2:
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return "A2";
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case 3:
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return "A3";
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}
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}
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return "??";
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}
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static int __init aspeed_socinfo_init(void)
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{
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struct soc_device_attribute *attrs;
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struct soc_device *soc_dev;
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struct device_node *np;
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void __iomem *reg;
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bool has_chipid = false;
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u32 siliconid;
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u32 chipid[2];
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const char *machine = NULL;
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np = of_find_compatible_node(NULL, NULL, "aspeed,silicon-id");
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if (!of_device_is_available(np)) {
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of_node_put(np);
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return -ENODEV;
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}
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reg = of_iomap(np, 0);
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if (!reg) {
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of_node_put(np);
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return -ENODEV;
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}
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siliconid = readl(reg);
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iounmap(reg);
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/* This is optional, the ast2400 does not have it */
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reg = of_iomap(np, 1);
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if (reg) {
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has_chipid = true;
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chipid[0] = readl(reg);
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chipid[1] = readl(reg + 4);
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iounmap(reg);
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}
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of_node_put(np);
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attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
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if (!attrs)
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return -ENODEV;
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/*
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* Machine: Romulus BMC
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* Family: AST2500
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* Revision: A1
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* SoC ID: raw silicon revision id
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* Serial Number: 64-bit chipid
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*/
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np = of_find_node_by_path("/");
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of_property_read_string(np, "model", &machine);
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if (machine)
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attrs->machine = kstrdup(machine, GFP_KERNEL);
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of_node_put(np);
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attrs->family = siliconid_to_name(siliconid);
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attrs->revision = siliconid_to_rev(siliconid);
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attrs->soc_id = kasprintf(GFP_KERNEL, "%08x", siliconid);
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if (has_chipid)
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attrs->serial_number = kasprintf(GFP_KERNEL, "%08x%08x",
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chipid[1], chipid[0]);
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soc_dev = soc_device_register(attrs);
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if (IS_ERR(soc_dev)) {
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kfree(attrs->soc_id);
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kfree(attrs->serial_number);
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kfree(attrs);
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return PTR_ERR(soc_dev);
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}
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pr_info("ASPEED %s rev %s (%s)\n",
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attrs->family,
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attrs->revision,
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attrs->soc_id);
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return 0;
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}
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early_initcall(aspeed_socinfo_init);
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