[PATCH] ARM: k3: add bootsource detection
Sascha Hauer
s.hauer at pengutronix.de
Tue Nov 12 01:01:14 PST 2024
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/dts/k3-am625.dtsi | 8 ++
arch/arm/mach-k3/common.c | 161 +++++++++++++++++++++++++++++++++++++
include/mach/k3/common.h | 6 ++
3 files changed, 175 insertions(+)
create mode 100644 include/mach/k3/common.h
diff --git a/arch/arm/dts/k3-am625.dtsi b/arch/arm/dts/k3-am625.dtsi
index 2b2d3e1b4d..7d49198aa2 100644
--- a/arch/arm/dts/k3-am625.dtsi
+++ b/arch/arm/dts/k3-am625.dtsi
@@ -1,4 +1,12 @@
+/ {
+ chosen {
+ barebox,bootsource-mmc0 = &sdhci0;
+ barebox,bootsource-mmc1 = &sdhci1;
+ barebox,bootsource-mmc2 = &sdhci2;
+ };
+};
+
&phy_gmii_sel {
compatible = "ti,am654-phy-gmii-sel", "syscon";
};
diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index 7c2375d3ec..0da6f76ae4 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -1,8 +1,13 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <of.h>
+#include <io.h>
#include <deep-probe.h>
#include <init.h>
#include <pm_domain.h>
+#include <bootsource.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <mach/k3/common.h>
static const struct of_device_id k3_of_match[] = {
{
@@ -12,11 +17,167 @@ static const struct of_device_id k3_of_match[] = {
};
BAREBOX_DEEP_PROBE_ENABLE(k3_of_match);
+/* Primary BootMode devices */
+#define BOOT_DEVICE_RAM 0x00
+#define BOOT_DEVICE_OSPI 0x01
+#define BOOT_DEVICE_QSPI 0x02
+#define BOOT_DEVICE_SPI 0x03
+#define BOOT_DEVICE_CPGMAC 0x04
+#define BOOT_DEVICE_ETHERNET_RGMII 0x04
+#define BOOT_DEVICE_ETHERNET_RMII 0x05
+#define BOOT_DEVICE_I2C 0x06
+#define BOOT_DEVICE_UART 0x07
+#define BOOT_DEVICE_MMC 0x08
+#define BOOT_DEVICE_EMMC 0x09
+
+#define BOOT_DEVICE_USB 0x2A
+#define BOOT_DEVICE_DFU 0x0A
+#define BOOT_DEVICE_GPMC_NAND 0x0B
+#define BOOT_DEVICE_GPMC_NOR 0x0C
+#define BOOT_DEVICE_XSPI 0x0E
+#define BOOT_DEVICE_NOBOOT 0x0F
+
+/* Backup BootMode devices */
+#define BACKUP_BOOT_DEVICE_DFU 0x01
+#define BACKUP_BOOT_DEVICE_UART 0x03
+#define BACKUP_BOOT_DEVICE_ETHERNET 0x04
+#define BACKUP_BOOT_DEVICE_MMC 0x05
+#define BACKUP_BOOT_DEVICE_SPI 0x06
+#define BACKUP_BOOT_DEVICE_I2C 0x07
+#define BACKUP_BOOT_DEVICE_USB 0x09
+
+#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 k3_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_USB:
+ *src = BOOTSOURCE_USB;
+ return;
+ case BACKUP_BOOT_DEVICE_ETHERNET:
+ *src = BOOTSOURCE_NET;
+ 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_I2C:
+ *src = BOOTSOURCE_I2C;
+ return;
+ case BACKUP_BOOT_DEVICE_DFU:
+ if (bkup_bootmode_cfg & MAIN_DEVSTAT_BACKUP_USB_MODE)
+ *src = BOOTSOURCE_USB;
+ else
+ *src = BOOT_DEVICE_DFU;
+ 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 k3_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:
+ fallthrough;
+ case BOOT_DEVICE_QSPI:
+ fallthrough;
+ case BOOT_DEVICE_XSPI:
+ fallthrough;
+ case BOOT_DEVICE_SPI:
+ *src = BOOTSOURCE_SPI;
+ return;
+ case BOOT_DEVICE_ETHERNET_RGMII:
+ fallthrough;
+ case BOOT_DEVICE_ETHERNET_RMII:
+ *src = BOOTSOURCE_NET;
+ 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_DFU:
+ if (bootmode_cfg & MAIN_DEVSTAT_PRIMARY_USB_MODE)
+ *src = BOOTSOURCE_USB;
+ else
+ *src = BOOT_DEVICE_DFU;
+ return;
+ case BOOT_DEVICE_NOBOOT:
+ *src = BOOTSOURCE_UNKNOWN;
+ return;
+ }
+}
+
+#define K3_BOOT_PARAM_TABLE_INDEX_OCRAM 0x7000F290
+
+static void k3_get_bootsource(u32 devstat, enum bootsource *src, int *instance)
+{
+ u32 bootmode = *(u32 *)(K3_BOOT_PARAM_TABLE_INDEX_OCRAM);
+
+ if (bootmode == K3_PRIMARY_BOOTMODE)
+ k3_get_primary_bootsource(devstat, src, instance);
+ else
+ k3_get_backup_bootsource(devstat, src, instance);
+}
+
+#define AM625_WKUP_CTRL_MMR0_BASE 0x43000000
+#define AM625_CTRLMMR_MAIN_DEVSTAT (AM625_WKUP_CTRL_MMR0_BASE + 0x30)
+
+void am625_get_bootsource(enum bootsource *src, int *instance)
+{
+ u32 devstat;
+
+ devstat = readl(AM625_CTRLMMR_MAIN_DEVSTAT);
+
+ k3_get_bootsource(devstat, src, instance);
+}
+
static int am625_init(void)
{
+ enum bootsource src = BOOTSOURCE_UNKNOWN;
+ int instance = 0;
+
if (!of_machine_is_compatible("ti,am625"))
return 0;
+ am625_get_bootsource(&src, &instance);
+ bootsource_set(src, instance);
+
genpd_activate();
return 0;
diff --git a/include/mach/k3/common.h b/include/mach/k3/common.h
new file mode 100644
index 0000000000..448ec1343c
--- /dev/null
+++ b/include/mach/k3/common.h
@@ -0,0 +1,6 @@
+#ifndef __MACH_K3_COMMON_H
+#define __MACH_K3_COMMON_H
+
+void am625_get_bootsource(enum bootsource *src, int *instance);
+
+#endif /* __MACH_K3_COMMON_H */
--
2.39.5
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