The Renesas R-Car Gen3 development kits contain board ID EEPROM.
This driver parses out the board ID and revision out of that
EEPROM and exports it e.g. for the board-info print on boot.
Signed-off-by: Marek Vasut <marek.vasut+rene...@gmail.com>
Cc: Sean Anderson <sean.ander...@seco.com>
Cc: Simon Glass <s...@chromium.org>
---
drivers/sysinfo/Kconfig | 7 ++
drivers/sysinfo/Makefile | 1 +
drivers/sysinfo/rcar3.c | 197 +++++++++++++++++++++++++++++++++++++++
3 files changed, 205 insertions(+)
create mode 100644 drivers/sysinfo/rcar3.c
diff --git a/drivers/sysinfo/Kconfig b/drivers/sysinfo/Kconfig
index 381dcd8844..e35f7cb179 100644
--- a/drivers/sysinfo/Kconfig
+++ b/drivers/sysinfo/Kconfig
@@ -17,6 +17,13 @@ config SYSINFO_GAZERBEAM
help
Support querying device information for the gdsys Gazerbeam board.
+config SYSINFO_RCAR3
+ bool "Enable sysinfo driver for the Renesas R-Car Gen3"
+ depends on RCAR_GEN3 && I2C_EEPROM
+ default y if RCAR_GEN3
+ help
+ Support querying SoC version information for Renesas R-Car Gen3.
+
config SYSINFO_SANDBOX
bool "Enable sysinfo driver for the Sandbox board"
help
diff --git a/drivers/sysinfo/Makefile b/drivers/sysinfo/Makefile
index d9f708b7ea..680dde77fe 100644
--- a/drivers/sysinfo/Makefile
+++ b/drivers/sysinfo/Makefile
@@ -5,5 +5,6 @@
obj-y += sysinfo-uclass.o
obj-$(CONFIG_SYSINFO_GAZERBEAM) += gazerbeam.o
obj-$(CONFIG_SYSINFO_GPIO) += gpio.o
+obj-$(CONFIG_SYSINFO_RCAR3) += rcar3.o
obj-$(CONFIG_SYSINFO_SANDBOX) += sandbox.o
obj-$(CONFIG_SYSINFO_SMBIOS) += smbios.o
diff --git a/drivers/sysinfo/rcar3.c b/drivers/sysinfo/rcar3.c
new file mode 100644
index 0000000000..c2f4ddfbbe
--- /dev/null
+++ b/drivers/sysinfo/rcar3.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Marek Vasut <marek.vasut+rene...@gmail.com>
+ */
+
+#include <common.h>
+#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_SALVATOR_XS 0x4
+#define BOARD_EBISU 0x8
+#define BOARD_STARTER_KIT_PRE 0xB
+#define BOARD_EBISU_4D 0xD
+#define BOARD_DRAAK 0xE
+#define BOARD_EAGLE 0xF
+
+/**
+ * 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;
+ 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;
+ 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,
+};
--
2.30.2
