152 lines
3.7 KiB
C
152 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2014 Linaro Ltd.
|
|
*
|
|
* Author: Linus Walleij <linus.walleij@linaro.org>
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sys_soc.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/of.h>
|
|
|
|
#define INTEGRATOR_HDR_ID_OFFSET 0x00
|
|
|
|
static u32 integrator_coreid;
|
|
|
|
static const struct of_device_id integrator_cm_match[] = {
|
|
{ .compatible = "arm,core-module-integrator", },
|
|
{ }
|
|
};
|
|
|
|
static const char *integrator_arch_str(u32 id)
|
|
{
|
|
switch ((id >> 16) & 0xff) {
|
|
case 0x00:
|
|
return "ASB little-endian";
|
|
case 0x01:
|
|
return "AHB little-endian";
|
|
case 0x03:
|
|
return "AHB-Lite system bus, bi-endian";
|
|
case 0x04:
|
|
return "AHB";
|
|
case 0x08:
|
|
return "AHB system bus, ASB processor bus";
|
|
default:
|
|
return "Unknown";
|
|
}
|
|
}
|
|
|
|
static const char *integrator_fpga_str(u32 id)
|
|
{
|
|
switch ((id >> 12) & 0xf) {
|
|
case 0x01:
|
|
return "XC4062";
|
|
case 0x02:
|
|
return "XC4085";
|
|
case 0x03:
|
|
return "XVC600";
|
|
case 0x04:
|
|
return "EPM7256AE (Altera PLD)";
|
|
default:
|
|
return "Unknown";
|
|
}
|
|
}
|
|
|
|
static ssize_t integrator_get_manf(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%02x\n", integrator_coreid >> 24);
|
|
}
|
|
|
|
static struct device_attribute integrator_manf_attr =
|
|
__ATTR(manufacturer, S_IRUGO, integrator_get_manf, NULL);
|
|
|
|
static ssize_t integrator_get_arch(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid));
|
|
}
|
|
|
|
static struct device_attribute integrator_arch_attr =
|
|
__ATTR(arch, S_IRUGO, integrator_get_arch, NULL);
|
|
|
|
static ssize_t integrator_get_fpga(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid));
|
|
}
|
|
|
|
static struct device_attribute integrator_fpga_attr =
|
|
__ATTR(fpga, S_IRUGO, integrator_get_fpga, NULL);
|
|
|
|
static ssize_t integrator_get_build(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF);
|
|
}
|
|
|
|
static struct device_attribute integrator_build_attr =
|
|
__ATTR(build, S_IRUGO, integrator_get_build, NULL);
|
|
|
|
static int __init integrator_soc_init(void)
|
|
{
|
|
static struct regmap *syscon_regmap;
|
|
struct soc_device *soc_dev;
|
|
struct soc_device_attribute *soc_dev_attr;
|
|
struct device_node *np;
|
|
struct device *dev;
|
|
u32 val;
|
|
int ret;
|
|
|
|
np = of_find_matching_node(NULL, integrator_cm_match);
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
syscon_regmap = syscon_node_to_regmap(np);
|
|
if (IS_ERR(syscon_regmap))
|
|
return PTR_ERR(syscon_regmap);
|
|
|
|
ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET,
|
|
&val);
|
|
if (ret)
|
|
return -ENODEV;
|
|
integrator_coreid = val;
|
|
|
|
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
|
|
if (!soc_dev_attr)
|
|
return -ENOMEM;
|
|
|
|
soc_dev_attr->soc_id = "Integrator";
|
|
soc_dev_attr->machine = "Integrator";
|
|
soc_dev_attr->family = "Versatile";
|
|
soc_dev = soc_device_register(soc_dev_attr);
|
|
if (IS_ERR(soc_dev)) {
|
|
kfree(soc_dev_attr);
|
|
return -ENODEV;
|
|
}
|
|
dev = soc_device_to_device(soc_dev);
|
|
|
|
device_create_file(dev, &integrator_manf_attr);
|
|
device_create_file(dev, &integrator_arch_attr);
|
|
device_create_file(dev, &integrator_fpga_attr);
|
|
device_create_file(dev, &integrator_build_attr);
|
|
|
|
dev_info(dev, "Detected ARM core module:\n");
|
|
dev_info(dev, " Manufacturer: %02x\n", (val >> 24));
|
|
dev_info(dev, " Architecture: %s\n", integrator_arch_str(val));
|
|
dev_info(dev, " FPGA: %s\n", integrator_fpga_str(val));
|
|
dev_info(dev, " Build: %02x\n", (val >> 4) & 0xFF);
|
|
dev_info(dev, " Rev: %c\n", ('A' + (val & 0x03)));
|
|
|
|
return 0;
|
|
}
|
|
device_initcall(integrator_soc_init);
|