[PATCH v2 2/6] board: phytec: common: Add imx8m specific EEPROM detection support
Teresa Remmet
t.remmet at phytec.de
Thu Aug 17 10:57:07 CEST 2023
Add imx8m specific detection part. Which includes checking the
EEPROM data for article number options.
Signed-off-by: Teresa Remmet <t.remmet at phytec.de>
---
Changes in v2:
- remove blank line at EOF
- fix string conversion to integer
- fix typo s/revsions/revisions
---
board/phytec/common/Kconfig | 8 ++
board/phytec/common/Makefile | 1 +
board/phytec/common/imx8m_som_detection.c | 168 ++++++++++++++++++++++
board/phytec/common/imx8m_som_detection.h | 54 +++++++
4 files changed, 231 insertions(+)
create mode 100644 board/phytec/common/imx8m_som_detection.c
create mode 100644 board/phytec/common/imx8m_som_detection.h
diff --git a/board/phytec/common/Kconfig b/board/phytec/common/Kconfig
index d614d45b1d60..3b1c5aa0d02b 100644
--- a/board/phytec/common/Kconfig
+++ b/board/phytec/common/Kconfig
@@ -3,3 +3,11 @@ config PHYTEC_SOM_DETECTION
select SPL_CRC8 if SPL
help
Support of I2C EEPROM based SoM detection.
+
+config PHYTEC_IMX8M_SOM_DETECTION
+ bool "Support SoM detection for i.MX8M PHYTEC platforms"
+ depends on ARCH_IMX8M && PHYTEC_SOM_DETECTION
+ default y
+ help
+ Support of I2C EEPROM based SoM detection. Supported
+ for PHYTEC i.MX8MM/i.MX8MP boards
diff --git a/board/phytec/common/Makefile b/board/phytec/common/Makefile
index 5fe8725ef684..fe28964ce21c 100644
--- a/board/phytec/common/Makefile
+++ b/board/phytec/common/Makefile
@@ -8,3 +8,4 @@ obj- := __dummy__.o
endif
obj-$(CONFIG_PHYTEC_SOM_DETECTION) += phytec_som_detection.o
+obj-$(CONFIG_PHYTEC_IMX8M_SOM_DETECTION) += imx8m_som_detection.o
diff --git a/board/phytec/common/imx8m_som_detection.c b/board/phytec/common/imx8m_som_detection.c
new file mode 100644
index 000000000000..c6c96ed19cb3
--- /dev/null
+++ b/board/phytec/common/imx8m_som_detection.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 PHYTEC Messtechnik GmbH
+ * Author: Teresa Remmet <t.remmet at phytec.de>
+ */
+
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
+#include <i2c.h>
+#include <u-boot/crc.h>
+
+#include "imx8m_som_detection.h"
+
+extern struct phytec_eeprom_data eeprom_data;
+
+/* Check if the SoM is actually one of the following products:
+ * - i.MX8MM
+ * - i.MX8MN
+ * - i.MX8MP
+ * - i.MX8MQ
+ *
+ * Returns 0 in case it's a known SoM. Otherwise, returns -1.
+ */
+u8 __maybe_unused phytec_imx8m_detect(struct phytec_eeprom_data *data)
+{
+ char *opt;
+ u8 som;
+
+ /* We can not do the check for early API revisions */
+ if (data->api_rev < PHYTEC_API_REV2)
+ return -1;
+
+ if (!data)
+ data = &eeprom_data;
+
+ som = data->data.data_api2.som_no;
+ debug("%s: som id: %u\n", __func__, som);
+
+ opt = phytec_get_opt(data);
+ if (!opt)
+ return -1;
+
+ if (som == PHYTEC_IMX8MP_SOM && is_imx8mp())
+ return 0;
+
+ if (som == PHYTEC_IMX8MM_SOM) {
+ if ((PHYTEC_GET_OPTION(opt[0]) != 0) &&
+ (PHYTEC_GET_OPTION(opt[1]) == 0) && is_imx8mm())
+ return 0;
+ else if ((PHYTEC_GET_OPTION(opt[0]) == 0) &&
+ (PHYTEC_GET_OPTION(opt[1]) != 0) && is_imx8mn())
+ return 0;
+ }
+
+ if (som == PHYTEC_IMX8MQ_SOM && is_imx8mq())
+ return 0;
+
+ pr_err("%s: SoM ID does not match. Wrong EEPROM data?\n", __func__);
+ return -1;
+}
+
+/*
+ * All PHYTEC i.MX8M boards have RAM size definition at the
+ * same location.
+ */
+u8 __maybe_unused phytec_get_imx8m_ddr_size(struct phytec_eeprom_data *data)
+{
+ char *opt;
+ u8 ddr_id;
+
+ if (!data)
+ data = &eeprom_data;
+
+ opt = phytec_get_opt(data);
+ if (opt)
+ ddr_id = PHYTEC_GET_OPTION(opt[2]);
+ else
+ ddr_id = PHYTEC_EEPROM_INVAL;
+
+ debug("%s: ddr id: %u\n", __func__, ddr_id);
+ return ddr_id;
+}
+
+/*
+ * Filter SPI-NOR flash information. All i.MX8M boards have this at
+ * the same location.
+ * returns: 0x0 if no SPI is populated. Otherwise a board depended
+ * code for the size. PHYTEC_EEPROM_INVAL when the data is invalid.
+ */
+u8 __maybe_unused phytec_get_imx8m_spi(struct phytec_eeprom_data *data)
+{
+ char *opt;
+ u8 spi;
+
+ if (!data)
+ data = &eeprom_data;
+
+ if (data->api_rev < PHYTEC_API_REV2)
+ return PHYTEC_EEPROM_INVAL;
+
+ opt = phytec_get_opt(data);
+ if (opt)
+ spi = PHYTEC_GET_OPTION(opt[4]);
+ else
+ spi = PHYTEC_EEPROM_INVAL;
+
+ debug("%s: spi: %u\n", __func__, spi);
+ return spi;
+}
+
+/*
+ * Filter ethernet phy information. All i.MX8M boards have this at
+ * the same location.
+ * returns: 0x0 if no ethernet phy is populated. 0x1 if it is populated.
+ * PHYTEC_EEPROM_INVAL when the data is invalid.
+ */
+u8 __maybe_unused phytec_get_imx8m_eth(struct phytec_eeprom_data *data)
+{
+ char *opt;
+ u8 eth;
+
+ if (!data)
+ data = &eeprom_data;
+
+ if (data->api_rev < PHYTEC_API_REV2)
+ return PHYTEC_EEPROM_INVAL;
+
+ opt = phytec_get_opt(data);
+ if (opt) {
+ eth = PHYTEC_GET_OPTION(opt[5]);
+ eth &= 0x1;
+ } else {
+ eth = PHYTEC_EEPROM_INVAL;
+ }
+
+ debug("%s: eth: %u\n", __func__, eth);
+ return eth;
+}
+
+/*
+ * Filter RTC information for phyCORE-i.MX8MP.
+ * returns: 0 if no RTC is populated. 1 if it is populated.
+ * PHYTEC_EEPROM_INVAL when the data is invalid.
+ */
+u8 __maybe_unused phytec_get_imx8mp_rtc(struct phytec_eeprom_data *data)
+{
+ char *opt;
+ u8 rtc;
+
+ if (!data)
+ data = &eeprom_data;
+
+ if (data->api_rev < PHYTEC_API_REV2)
+ return PHYTEC_EEPROM_INVAL;
+
+ opt = phytec_get_opt(data);
+ if (opt) {
+ rtc = PHYTEC_GET_OPTION(opt[5]);
+ rtc &= 0x4;
+ rtc = !(rtc >> 2);
+ } else {
+ rtc = PHYTEC_EEPROM_INVAL;
+ }
+ debug("%s: rtc: %u\n", __func__, rtc);
+ return rtc;
+}
diff --git a/board/phytec/common/imx8m_som_detection.h b/board/phytec/common/imx8m_som_detection.h
new file mode 100644
index 000000000000..88d3037bf363
--- /dev/null
+++ b/board/phytec/common/imx8m_som_detection.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2023 PHYTEC Messtechnik GmbH
+ * Author: Teresa Remmet <t.remmet at phytec.de>
+ */
+
+#ifndef _PHYTEC_IMX8M_SOM_DETECTION_H
+#define _PHYTEC_IMX8M_SOM_DETECTION_H
+
+#include "phytec_som_detection.h"
+
+#define PHYTEC_IMX8MQ_SOM 66
+#define PHYTEC_IMX8MM_SOM 69
+#define PHYTEC_IMX8MP_SOM 70
+
+#if IS_ENABLED(CONFIG_PHYTEC_IMX8M_SOM_DETECTION)
+
+u8 __maybe_unused phytec_imx8m_detect(struct phytec_eeprom_data *data);
+u8 __maybe_unused phytec_get_imx8m_ddr_size(struct phytec_eeprom_data *data);
+u8 __maybe_unused phytec_get_imx8mp_rtc(struct phytec_eeprom_data *data);
+u8 __maybe_unused phytec_get_imx8m_spi(struct phytec_eeprom_data *data);
+u8 __maybe_unused phytec_get_imx8m_eth(struct phytec_eeprom_data *data);
+
+#else
+
+inline u8 __maybe_unused phytec_imx8m_detect(struct phytec_eeprom_data *data)
+{
+ return -1;
+}
+
+inline u8 __maybe_unused
+phytec_get_imx8m_ddr_size(struct phytec_eeprom_data *data)
+{
+ return PHYTEC_EEPROM_INVAL;
+}
+
+inline u8 __maybe_unused phytec_get_imx8mp_rtc(struct phytec_eeprom_data *data)
+{
+ return PHYTEC_EEPROM_INVAL;
+}
+
+inline u8 __maybe_unused phytec_get_imx8m_spi(struct phytec_eeprom_data *data)
+{
+ return PHYTEC_EEPROM_INVAL;
+}
+
+inline u8 __maybe_unused phytec_get_imx8m_eth(struct phytec_eeprom_data *data)
+{
+ return PHYTEC_EEPROM_INVAL;
+}
+
+#endif /* IS_ENABLED(CONFIG_PHYTEC_IMX8M_SOM_DETECTION) */
+
+#endif /* _PHYTEC_IMX8M_SOM_DETECTION_H */
--
2.34.1
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