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