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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2021 Marek Vasut <marek.vasut+renesas@gmail.com>
*/
#include <dm.h>
#include <i2c_eeprom.h>
#include <log.h>
#include <sysinfo.h>
#define BOARD_CODE_MASK 0xF8
#define BOARD_REV_MASK 0x07
#define BOARD_CODE_SHIFT 0x03
#define BOARD_SALVATOR_X 0x0
#define BOARD_KRIEK 0x1
#define BOARD_STARTER_KIT 0x2
#define BOARD_EAGLE 0x3
#define BOARD_SALVATOR_XS 0x4
#define BOARD_CONDOR 0x6
#define BOARD_DRAAK 0x7
#define BOARD_EBISU 0x8
#define BOARD_STARTER_KIT_PRE 0xB
#define BOARD_EBISU_4D 0xD
#define BOARD_CONDOR_I 0x10
/**
* struct sysinfo_rcar_priv - sysinfo private data
* @boardname: board model and revision
* @val: board ID value from eeprom
*/
struct sysinfo_rcar_priv {
char boardmodel[64];
u8 val;
};
static int sysinfo_rcar_detect(struct udevice *dev)
{
struct sysinfo_rcar_priv *priv = dev_get_priv(dev);
return priv->val == 0xff;
}
static int sysinfo_rcar_get_str(struct udevice *dev, int id, size_t size, char *val)
{
struct sysinfo_rcar_priv *priv = dev_get_priv(dev);
switch (id) {
case SYSINFO_ID_BOARD_MODEL:
strncpy(val, priv->boardmodel, size);
val[size - 1] = '\0';
return 0;
default:
return -EINVAL;
};
}
static const struct sysinfo_ops sysinfo_rcar_ops = {
.detect = sysinfo_rcar_detect,
.get_str = sysinfo_rcar_get_str,
};
static void sysinfo_rcar_parse(struct sysinfo_rcar_priv *priv)
{
const u8 board_id = (priv->val & BOARD_CODE_MASK) >> BOARD_CODE_SHIFT;
const u8 board_rev = priv->val & BOARD_REV_MASK;
bool salvator_xs = false;
bool ebisu_4d = false;
bool condor_i = false;
char rev_major = '?';
char rev_minor = '?';
switch (board_id) {
case BOARD_SALVATOR_XS:
salvator_xs = true;
fallthrough;
case BOARD_SALVATOR_X:
if (!(board_rev & ~1)) { /* Only rev 0 and 1 is valid */
rev_major = '1';
rev_minor = '0' + (board_rev & BIT(0));
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Salvator-X%s board rev %c.%c",
salvator_xs ? "S" : "", rev_major, rev_minor);
return;
case BOARD_STARTER_KIT:
if (!(board_rev & ~1)) { /* Only rev 0 and 1 is valid */
rev_major = (board_rev & BIT(0)) ? '3' : '1';
rev_minor = '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Starter Kit board rev %c.%c",
rev_major, rev_minor);
return;
case BOARD_STARTER_KIT_PRE:
if (!(board_rev & ~3)) { /* Only rev 0..3 is valid */
rev_major = (board_rev & BIT(1)) ? '2' : '1';
rev_minor = (board_rev == 3) ? '1' : '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Starter Kit Premier board rev %c.%c",
rev_major, rev_minor);
return;
case BOARD_EAGLE:
if (!board_rev) { /* Only rev 0 is valid */
rev_major = '1';
rev_minor = '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Eagle board rev %c.%c",
rev_major, rev_minor);
return;
case BOARD_EBISU_4D:
ebisu_4d = true;
fallthrough;
case BOARD_EBISU:
if (!board_rev) { /* Only rev 0 is valid */
rev_major = '1';
rev_minor = '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Ebisu%s board rev %c.%c",
ebisu_4d ? "-4D" : "", rev_major, rev_minor);
return;
case BOARD_DRAAK:
if (!board_rev) { /* Only rev 0 is valid */
rev_major = '1';
rev_minor = '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Draak board rev %c.%c",
rev_major, rev_minor);
return;
case BOARD_KRIEK:
if (!board_rev) { /* Only rev 0 is valid */
rev_major = '1';
rev_minor = '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Kriek board rev %c.%c",
rev_major, rev_minor);
return;
case BOARD_CONDOR_I:
condor_i = true;
fallthrough;
case BOARD_CONDOR:
if (!board_rev) { /* Only rev 0 is valid */
rev_major = '1';
rev_minor = '0';
}
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas Condor%s board rev %c.%c",
condor_i ? "-I" : "", rev_major, rev_minor);
return;
default:
snprintf(priv->boardmodel, sizeof(priv->boardmodel),
"Renesas -Unknown- board rev ?.?");
priv->val = 0xff;
return;
}
}
static int sysinfo_rcar_probe(struct udevice *dev)
{
struct sysinfo_rcar_priv *priv = dev_get_priv(dev);
struct ofnode_phandle_args phandle_args;
struct udevice *i2c_eeprom;
u32 offset;
int ret;
offset = dev_read_u32_default(dev, "offset", 0x70);
ret = dev_read_phandle_with_args(dev, "i2c-eeprom", NULL,
0, 0, &phandle_args);
if (ret) {
debug("%s: i2c-eeprom backing device not specified\n",
dev->name);
return ret;
}
ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, phandle_args.node,
&i2c_eeprom);
if (ret) {
debug("%s: could not get backing device\n", dev->name);
return ret;
}
ret = i2c_eeprom_read(i2c_eeprom, offset, &priv->val, 1);
if (ret < 0) {
debug("%s: read failed\n", __func__);
return -EIO;
}
sysinfo_rcar_parse(priv);
return 0;
}
static const struct udevice_id sysinfo_rcar_ids[] = {
{ .compatible = "renesas,rcar-sysinfo" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(sysinfo_rcar) = {
.name = "sysinfo_rcar",
.id = UCLASS_SYSINFO,
.of_match = sysinfo_rcar_ids,
.ops = &sysinfo_rcar_ops,
.priv_auto = sizeof(struct sysinfo_rcar_priv),
.probe = sysinfo_rcar_probe,
};
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