[PATCH v2 06/33] ARM: K3: add am62lx base support
Sascha Hauer
s.hauer at pengutronix.de
Thu Jun 5 05:42:31 PDT 2025
This adds the MACH_AM62LX Kconfig symbol to be selected by the boards
and the AM62l bootsource detection.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/mach-k3/Kconfig | 3 +
arch/arm/mach-k3/Makefile | 1 +
arch/arm/mach-k3/am62lx.c | 155 ++++++++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-k3/common.c | 5 +-
include/mach/k3/common.h | 1 +
5 files changed, 164 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index 1c236ef7648869ff3605bfb379298f0e6e6f3305..cda44807e8a1db7c2f701309948c7bd1a863d365 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -6,6 +6,9 @@ menu "K3 boards"
config MACH_AM62X
bool
+config MACH_AM62LX
+ bool
+
config MACH_K3_CORTEX_R5
bool
select CPU_V7
diff --git a/arch/arm/mach-k3/Makefile b/arch/arm/mach-k3/Makefile
index b81088007426a1e2a43d84a0d09b49525370c4bf..050d12a32a6720170a007931fee8a621a0326dd2 100644
--- a/arch/arm/mach-k3/Makefile
+++ b/arch/arm/mach-k3/Makefile
@@ -1,5 +1,6 @@
obj-y += common.o
obj-$(CONFIG_MACH_AM62X) += am62x.o
+obj-$(CONFIG_MACH_AM62LX) += am62lx.o
obj-pbl-$(CONFIG_MACH_K3_CORTEX_R5) += r5.o
obj-pbl-y += ddrss.o
obj-$(CONFIG_BAREBOX_UPDATE) += bbu.o
diff --git a/arch/arm/mach-k3/am62lx.c b/arch/arm/mach-k3/am62lx.c
new file mode 100644
index 0000000000000000000000000000000000000000..38a88ea7cf95be110a4125807630db10d402534e
--- /dev/null
+++ b/arch/arm/mach-k3/am62lx.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <io.h>
+#include <of.h>
+#include <init.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <pm_domain.h>
+#include <bootsource.h>
+#include <mach/k3/common.h>
+
+/* Primary BootMode devices */
+#define BOOT_DEVICE_SPI_NAND 0x00
+#define BOOT_DEVICE_RAM 0xFF
+#define BOOT_DEVICE_OSPI 0x01
+#define BOOT_DEVICE_QSPI 0x02
+#define BOOT_DEVICE_SPI 0x03
+#define BOOT_DEVICE_UART 0x07
+#define BOOT_DEVICE_MMC 0x08
+#define BOOT_DEVICE_EMMC 0x09
+#define BOOT_DEVICE_USB 0x0A
+#define BOOT_DEVICE_DFU 0x0A
+#define BOOT_DEVICE_GPMC_NAND 0x0B
+#define BOOT_DEVICE_XSPI_FAST 0x0D
+#define BOOT_DEVICE_XSPI 0x0E
+#define BOOT_DEVICE_NOBOOT 0x0F
+
+/* U-Boot used aliases */
+#define BOOT_DEVICE_SPINAND 0x10
+#define BOOT_DEVICE_MMC2 BOOT_DEVICE_MMC
+#define BOOT_DEVICE_MMC1 BOOT_DEVICE_EMMC
+/* Invalid Choices for the AM62Lx */
+#define BOOT_DEVICE_MMC2_2 0x1F
+#define BOOT_DEVICE_ETHERNET 0x1F
+
+/* Backup BootMode devices */
+#define BACKUP_BOOT_DEVICE_USB 0x01
+#define BACKUP_BOOT_DEVICE_DFU 0x01
+#define BACKUP_BOOT_DEVICE_UART 0x03
+#define BACKUP_BOOT_DEVICE_MMC 0x05
+#define BACKUP_BOOT_DEVICE_SPI 0x06
+
+#define K3_PRIMARY_BOOTMODE 0x0
+
+#define MAIN_DEVSTAT_BACKUP_BOOTMODE GENMASK(12, 10)
+#define MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG BIT(13)
+#define MAIN_DEVSTAT_BACKUP_USB_MODE BIT(0)
+
+static void am62lx_get_backup_bootsource(u32 devstat, enum bootsource *src, int *instance)
+{
+ u32 bkup_bootmode = FIELD_GET(MAIN_DEVSTAT_BACKUP_BOOTMODE, devstat);
+ u32 bkup_bootmode_cfg = FIELD_GET(MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG, devstat);
+
+ *src = BOOTSOURCE_UNKNOWN;
+
+ switch (bkup_bootmode) {
+ case BACKUP_BOOT_DEVICE_UART:
+ *src = BOOTSOURCE_SERIAL;
+ return;
+ case BACKUP_BOOT_DEVICE_MMC:
+ if (bkup_bootmode_cfg) {
+ *src = BOOTSOURCE_MMC;
+ *instance = 1;
+ } else {
+ *src = BOOTSOURCE_MMC;
+ *instance = 0;
+ }
+ return;
+ case BACKUP_BOOT_DEVICE_SPI:
+ *src = BOOTSOURCE_SPI;
+ return;
+ case BACKUP_BOOT_DEVICE_USB:
+ if (bkup_bootmode_cfg & MAIN_DEVSTAT_BACKUP_USB_MODE)
+ *src = BOOTSOURCE_USB;
+ else
+ *src = BOOTSOURCE_SERIAL;
+ return;
+ };
+}
+
+#define MAIN_DEVSTAT_PRIMARY_BOOTMODE GENMASK(6, 3)
+#define MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG GENMASK(9, 7)
+#define MAIN_DEVSTAT_PRIMARY_USB_MODE BIT(1)
+#define MAIN_DEVSTAT_PRIMARY_MMC_PORT BIT(2)
+
+static void am62lx_get_primary_bootsource(u32 devstat, enum bootsource *src, int *instance)
+{
+ u32 bootmode = FIELD_GET(MAIN_DEVSTAT_PRIMARY_BOOTMODE, devstat);
+ u32 bootmode_cfg = FIELD_GET(MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG, devstat);
+
+ switch (bootmode) {
+ case BOOT_DEVICE_OSPI:
+ case BOOT_DEVICE_QSPI:
+ case BOOT_DEVICE_XSPI:
+ case BOOT_DEVICE_SPI:
+ *src = BOOTSOURCE_SPI;
+ return;
+ case BOOT_DEVICE_EMMC:
+ *src = BOOTSOURCE_MMC;
+ *instance = 0;
+ return;
+ case BOOT_DEVICE_MMC:
+ if (bootmode_cfg & MAIN_DEVSTAT_PRIMARY_MMC_PORT) {
+ *src = BOOTSOURCE_MMC;
+ *instance = 1;
+ } else {
+ *src = BOOTSOURCE_MMC;
+ *instance = 0;
+ }
+ return;
+ case BOOT_DEVICE_USB:
+ if (bootmode_cfg & MAIN_DEVSTAT_PRIMARY_USB_MODE)
+ *src = BOOTSOURCE_USB;
+ else
+ *src = BOOTSOURCE_SERIAL;
+ return;
+ case BOOT_DEVICE_NOBOOT:
+ *src = BOOTSOURCE_UNKNOWN;
+ return;
+ }
+}
+
+#define AM62LX_BOOT_PARAM_TABLE_INDEX_OCRAM IOMEM(0x70816e70)
+
+#define AM62LX_WKUP_CTRL_MMR0_BASE IOMEM(0x43010000)
+#define AM62LX_CTRLMMR_MAIN_DEVSTAT (AM62LX_WKUP_CTRL_MMR0_BASE + 0x30)
+
+void am62lx_get_bootsource(enum bootsource *src, int *instance)
+{
+ u32 bootmode = readl(AM62LX_BOOT_PARAM_TABLE_INDEX_OCRAM);
+ u32 devstat;
+
+ devstat = readl(AM62LX_CTRLMMR_MAIN_DEVSTAT);
+
+ if (bootmode == K3_PRIMARY_BOOTMODE)
+ am62lx_get_primary_bootsource(devstat, src, instance);
+ else
+ am62lx_get_backup_bootsource(devstat, src, instance);
+}
+
+static int am62lx_init(void)
+{
+ enum bootsource src = BOOTSOURCE_UNKNOWN;
+ int instance = 0;
+
+ if (!of_machine_is_compatible("ti,am62l3"))
+ return 0;
+
+ am62lx_get_bootsource(&src, &instance);
+ bootsource_set(src, instance);
+
+ genpd_activate();
+
+ return 0;
+}
+postcore_initcall(am62lx_init);
diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index 7299355eecef1c38e0d53a8feda60d233d74e2cd..aafd22453b9c8393e75fad07a21712a5af6674ef 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -20,8 +20,11 @@
static const struct of_device_id k3_of_match[] = {
{
.compatible = "ti,am625",
+ }, {
+ .compatible = "ti,am62l3",
+ }, {
+ /* sentinel */
},
- { /* sentinel */ },
};
BAREBOX_DEEP_PROBE_ENABLE(k3_of_match);
diff --git a/include/mach/k3/common.h b/include/mach/k3/common.h
index d14b8b9cb891dd23dcc3a6277e79aa9f639f412a..5ce129f88cc8522954670d0ae34dda76445fcb75 100644
--- a/include/mach/k3/common.h
+++ b/include/mach/k3/common.h
@@ -9,6 +9,7 @@
UUID_INIT(0x9e8c2017, 0x8b94, 0x4e2b, 0xa7, 0xb3, 0xa0, 0xf8, 0x8e, 0xab, 0xb8, 0xae)
void am62x_get_bootsource(enum bootsource *src, int *instance);
+void am62lx_get_bootsource(enum bootsource *src, int *instance);
bool k3_boot_is_emmc(void);
u64 am62x_sdram_size(void);
void am62x_register_dram(void);
--
2.39.5
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