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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
* Dave Gerlach <d-gerlach@ti.com>
*/
#include <common.h>
#include <dm.h>
#include <soc.h>
#include <asm/io.h>
#define AM65X 0xbb5a
#define J721E 0xbb64
#define J7200 0xbb6d
#define REV_SR1_0 0
#define REV_SR2_0 1
#define JTAG_ID_VARIANT_SHIFT 28
#define JTAG_ID_VARIANT_MASK (0xf << 28)
#define JTAG_ID_PARTNO_SHIFT 12
#define JTAG_ID_PARTNO_MASK (0xffff << 12)
struct soc_ti_k3_platdata {
const char *family;
const char *revision;
};
static const char *get_family_string(u32 idreg)
{
const char *family;
u32 soc;
soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
switch (soc) {
case AM65X:
family = "AM65X";
break;
case J721E:
family = "J721E";
break;
case J7200:
family = "J7200";
break;
default:
family = "Unknown Silicon";
};
return family;
}
static const char *get_rev_string(u32 idreg)
{
const char *revision;
u32 rev;
rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
switch (rev) {
case REV_SR1_0:
revision = "1.0";
break;
case REV_SR2_0:
revision = "2.0";
break;
default:
revision = "Unknown Revision";
};
return revision;
}
static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
{
struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
snprintf(buf, size, "%s", plat->family);
return 0;
}
static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
{
struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
snprintf(buf, size, "SR%s", plat->revision);
return 0;
}
static const struct soc_ops soc_ti_k3_ops = {
.get_family = soc_ti_k3_get_family,
.get_revision = soc_ti_k3_get_revision,
};
int soc_ti_k3_probe(struct udevice *dev)
{
struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
u32 idreg;
void *idreg_addr;
idreg_addr = dev_read_addr_ptr(dev);
if (!idreg_addr)
return -EINVAL;
idreg = readl(idreg_addr);
plat->family = get_family_string(idreg);
plat->revision = get_rev_string(idreg);
return 0;
}
static const struct udevice_id soc_ti_k3_ids[] = {
{ .compatible = "ti,am654-chipid" },
{ }
};
U_BOOT_DRIVER(soc_ti_k3) = {
.name = "soc_ti_k3",
.id = UCLASS_SOC,
.ops = &soc_ti_k3_ops,
.of_match = soc_ti_k3_ids,
.probe = soc_ti_k3_probe,
.plat_auto = sizeof(struct soc_ti_k3_platdata),
};
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