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152 lines
3.0 KiB
152 lines
3.0 KiB
// 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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}; |
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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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