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/*
* Freescale QorIQ Platforms GUTS Driver
*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of_fdt.h>
#include <linux/sys_soc.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/fsl/guts.h>
struct guts {
struct ccsr_guts __iomem *regs;
bool little_endian;
};
struct fsl_soc_die_attr {
char *die;
u32 svr;
u32 mask;
};
static struct guts *guts;
static struct soc_device_attribute soc_dev_attr;
static struct soc_device *soc_dev;
/* SoC die attribute definition for QorIQ platform */
static const struct fsl_soc_die_attr fsl_soc_die[] = {
/*
* Power Architecture-based SoCs T Series
*/
/* Die: T4240, SoC: T4240/T4160/T4080 */
{ .die = "T4240",
.svr = 0x82400000,
.mask = 0xfff00000,
},
/* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
{ .die = "T1040",
.svr = 0x85200000,
.mask = 0xfff00000,
},
/* Die: T2080, SoC: T2080/T2081 */
{ .die = "T2080",
.svr = 0x85300000,
.mask = 0xfff00000,
},
/* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
{ .die = "T1024",
.svr = 0x85400000,
.mask = 0xfff00000,
},
/*
* ARM-based SoCs LS Series
*/
/* Die: LS1043A, SoC: LS1043A/LS1023A */
{ .die = "LS1043A",
.svr = 0x87920000,
.mask = 0xffff0000,
},
/* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
{ .die = "LS2080A",
.svr = 0x87010000,
.mask = 0xff3f0000,
},
/* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
{ .die = "LS1088A",
.svr = 0x87030000,
.mask = 0xff3f0000,
},
/* Die: LS1012A, SoC: LS1012A */
{ .die = "LS1012A",
.svr = 0x87040000,
.mask = 0xffff0000,
},
/* Die: LS1046A, SoC: LS1046A/LS1026A */
{ .die = "LS1046A",
.svr = 0x87070000,
.mask = 0xffff0000,
},
/* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
{ .die = "LS2088A",
.svr = 0x87090000,
.mask = 0xff3f0000,
},
/* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
{ .die = "LS1021A",
.svr = 0x87000000,
.mask = 0xfff70000,
},
{ },
};
static const struct fsl_soc_die_attr *fsl_soc_die_match(
u32 svr, const struct fsl_soc_die_attr *matches)
{
while (matches->svr) {
if (matches->svr == (svr & matches->mask))
return matches;
matches++;
};
return NULL;
}
u32 fsl_guts_get_svr(void)
{
u32 svr = 0;
if (!guts || !guts->regs)
return svr;
if (guts->little_endian)
svr = ioread32(&guts->regs->svr);
else
svr = ioread32be(&guts->regs->svr);
return svr;
}
EXPORT_SYMBOL(fsl_guts_get_svr);
static int fsl_guts_probe(struct platform_device *pdev)
{
struct device_node *root, *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct resource *res;
const struct fsl_soc_die_attr *soc_die;
const char *machine;
u32 svr;
/* Initialize guts */
guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
if (!guts)
return -ENOMEM;
guts->little_endian = of_property_read_bool(np, "little-endian");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
guts->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(guts->regs))
return PTR_ERR(guts->regs);
/* Register soc device */
root = of_find_node_by_path("/");
if (of_property_read_string(root, "model", &machine))
of_property_read_string_index(root, "compatible", 0, &machine);
of_node_put(root);
if (machine)
soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
svr = fsl_guts_get_svr();
soc_die = fsl_soc_die_match(svr, fsl_soc_die);
if (soc_die) {
soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
"QorIQ %s", soc_die->die);
} else {
soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ");
}
soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL,
"svr:0x%08x", svr);
soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
(svr >> 4) & 0xf, svr & 0xf);
soc_dev = soc_device_register(&soc_dev_attr);
if (IS_ERR(soc_dev))
return PTR_ERR(soc_dev);
pr_info("Machine: %s\n", soc_dev_attr.machine);
pr_info("SoC family: %s\n", soc_dev_attr.family);
pr_info("SoC ID: %s, Revision: %s\n",
soc_dev_attr.soc_id, soc_dev_attr.revision);
return 0;
}
static int fsl_guts_remove(struct platform_device *dev)
{
soc_device_unregister(soc_dev);
return 0;
}
/*
* Table for matching compatible strings, for device tree
* guts node, for Freescale QorIQ SOCs.
*/
static const struct of_device_id fsl_guts_of_match[] = {
{ .compatible = "fsl,qoriq-device-config-1.0", },
{ .compatible = "fsl,qoriq-device-config-2.0", },
{ .compatible = "fsl,p1010-guts", },
{ .compatible = "fsl,p1020-guts", },
{ .compatible = "fsl,p1021-guts", },
{ .compatible = "fsl,p1022-guts", },
{ .compatible = "fsl,p1023-guts", },
{ .compatible = "fsl,p2020-guts", },
{ .compatible = "fsl,bsc9131-guts", },
{ .compatible = "fsl,bsc9132-guts", },
{ .compatible = "fsl,mpc8536-guts", },
{ .compatible = "fsl,mpc8544-guts", },
{ .compatible = "fsl,mpc8548-guts", },
{ .compatible = "fsl,mpc8568-guts", },
{ .compatible = "fsl,mpc8569-guts", },
{ .compatible = "fsl,mpc8572-guts", },
{ .compatible = "fsl,ls1021a-dcfg", },
{ .compatible = "fsl,ls1043a-dcfg", },
{ .compatible = "fsl,ls2080a-dcfg", },
{}
};
MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
static struct platform_driver fsl_guts_driver = {
.driver = {
.name = "fsl-guts",
.of_match_table = fsl_guts_of_match,
},
.probe = fsl_guts_probe,
.remove = fsl_guts_remove,
};
static int __init fsl_guts_init(void)
{
return platform_driver_register(&fsl_guts_driver);
}
core_initcall(fsl_guts_init);
static void __exit fsl_guts_exit(void)
{
platform_driver_unregister(&fsl_guts_driver);
}
module_exit(fsl_guts_exit);
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