[PATCH 1/4] arm: mach-k3: Add support for device type detection

[Andrew Davis]

K3 SoCs are available in a number of device types such as
GP, HS-FS, EMU, etc. Like OMAP SoCs we can detect this at runtime
and should print this out as part of the SoC information line.
We add this as part of the common.c file as it will be used
to also modify our security state early in the device boot.

Signed-off-by: Andrew Davis <afd at ti.com>
---
 arch/arm/mach-k3/common.c                | 51 +++++++++++++++++++++++-
 arch/arm/mach-k3/common.h                | 10 +++++
 arch/arm/mach-k3/include/mach/hardware.h | 10 +++++
 3 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index 70f6444e79..ac14975694 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -396,7 +396,54 @@ void reset_cpu(void)
 }
 #endif
 
+enum k3_device_type get_device_type(void)
+{
+	u32 sys_status = readl(K3_SEC_MGR_SYS_STATUS);
+
+	u32 sys_dev_type = (sys_status & SYS_STATUS_DEV_TYPE_MASK) >>
+			SYS_STATUS_DEV_TYPE_SHIFT;
+
+	u32 sys_sub_type = (sys_status & SYS_STATUS_SUB_TYPE_MASK) >>
+			SYS_STATUS_SUB_TYPE_SHIFT;
+
+	switch (sys_dev_type) {
+	case SYS_STATUS_DEV_TYPE_GP:
+		return K3_DEVICE_TYPE_GP;
+	case SYS_STATUS_DEV_TYPE_TEST:
+		return K3_DEVICE_TYPE_TEST;
+	case SYS_STATUS_DEV_TYPE_EMU:
+		return K3_DEVICE_TYPE_EMU;
+	case SYS_STATUS_DEV_TYPE_HS:
+		if (sys_sub_type == SYS_STATUS_SUB_TYPE_VAL_FS)
+			return K3_DEVICE_TYPE_HS_FS;
+		else
+			return K3_DEVICE_TYPE_HS_SE;
+	default:
+		return K3_DEVICE_TYPE_BAD;
+	}
+}
+
 #if defined(CONFIG_DISPLAY_CPUINFO)
+static const char *get_device_type_name(void)
+{
+	enum k3_device_type type = get_device_type();
+
+	switch (type) {
+	case K3_DEVICE_TYPE_GP:
+		return "GP";
+	case K3_DEVICE_TYPE_TEST:
+		return "TEST";
+	case K3_DEVICE_TYPE_EMU:
+		return "EMU";
+	case K3_DEVICE_TYPE_HS_FS:
+		return "HS-FS";
+	case K3_DEVICE_TYPE_HS_SE:
+		return "HS-SE";
+	default:
+		return "BAD";
+	}
+}
+
 int print_cpuinfo(void)
 {
 	struct udevice *soc;
@@ -418,9 +465,11 @@ int print_cpuinfo(void)
 
 	ret = soc_get_revision(soc, name, 64);
 	if (!ret) {
-		printf("%s\n", name);
+		printf("%s ", name);
 	}
 
+	printf("%s\n", get_device_type_name());
+
 	return 0;
 }
 #endif
diff --git a/arch/arm/mach-k3/common.h b/arch/arm/mach-k3/common.h
index e81b70d7c3..8f38fcef7f 100644
--- a/arch/arm/mach-k3/common.h
+++ b/arch/arm/mach-k3/common.h
@@ -18,6 +18,15 @@ struct fwl_data {
 	u16 regions;
 };
 
+enum k3_device_type {
+	K3_DEVICE_TYPE_BAD,
+	K3_DEVICE_TYPE_GP,
+	K3_DEVICE_TYPE_TEST,
+	K3_DEVICE_TYPE_EMU,
+	K3_DEVICE_TYPE_HS_FS,
+	K3_DEVICE_TYPE_HS_SE,
+};
+
 void setup_k3_mpu_regions(void);
 int early_console_init(void);
 void disable_linefill_optimization(void);
@@ -27,4 +36,5 @@ void k3_sysfw_print_ver(void);
 void spl_enable_dcache(void);
 void mmr_unlock(phys_addr_t base, u32 partition);
 bool is_rom_loaded_sysfw(struct rom_extended_boot_data *data);
+enum k3_device_type get_device_type(void);
 void ti_secure_image_post_process(void **p_image, size_t *p_size);
diff --git a/arch/arm/mach-k3/include/mach/hardware.h b/arch/arm/mach-k3/include/mach/hardware.h
index 7c6928d5da..73dc2d2d98 100644
--- a/arch/arm/mach-k3/include/mach/hardware.h
+++ b/arch/arm/mach-k3/include/mach/hardware.h
@@ -32,6 +32,16 @@
 #define JTAG_ID_VARIANT_MASK	(0xf << 28)
 #define JTAG_ID_PARTNO_SHIFT	12
 #define JTAG_ID_PARTNO_MASK	(0xffff << 12)
+#define K3_SEC_MGR_SYS_STATUS		0x44234100
+#define SYS_STATUS_DEV_TYPE_SHIFT	0
+#define SYS_STATUS_DEV_TYPE_MASK	(0xf)
+#define SYS_STATUS_DEV_TYPE_GP		0x3
+#define SYS_STATUS_DEV_TYPE_TEST	0x5
+#define SYS_STATUS_DEV_TYPE_EMU		0x9
+#define SYS_STATUS_DEV_TYPE_HS		0xa
+#define SYS_STATUS_SUB_TYPE_SHIFT	8
+#define SYS_STATUS_SUB_TYPE_MASK	(0xf << 8)
+#define SYS_STATUS_SUB_TYPE_VAL_FS	0xa
 
 #define K3_ROM_BOOT_HEADER_MAGIC	"EXTBOOT"
 
-- 
2.36.1