The ZynqMP reports the mode pins sampled at POR via the register
ZYNQMP_CRL_APB_BOOT_MODE_USER. This commit adds a function that reads
the register and populates the boot source.
Signed-off-by: Michael Riesch <michael.riesch@xxxxxxxxxxxxxx>
---
arch/arm/mach-zynqmp/zynqmp.c | 43 +++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/arch/arm/mach-zynqmp/zynqmp.c b/arch/arm/mach-zynqmp/zynqmp.c
index 5871c145b..262bc0dd4 100644
--- a/arch/arm/mach-zynqmp/zynqmp.c
+++ b/arch/arm/mach-zynqmp/zynqmp.c
@@ -6,9 +6,11 @@
#include <common.h>
#include <init.h>
#include <linux/types.h>
+#include <bootsource.h>
#include <reset_source.h>
#define ZYNQMP_CRL_APB_BASE 0xff5e0000
+#define ZYNQMP_CRL_APB_BOOT_MODE_USER (ZYNQMP_CRL_APB_BASE + 0x200)
#define ZYNQMP_CRL_APB_RESET_REASON (ZYNQMP_CRL_APB_BASE + 0x220)
/* External POR: The PS_POR_B reset signal pin was asserted. */
@@ -26,6 +28,46 @@
/* Software debugger reset: Write to BLOCKONLY_RST [debug_only]. */
#define ZYNQMP_CRL_APB_RESET_REASON_DEBUG_SYS BIT(6)
+struct zynqmp_bootsource {
+ enum bootsource src;
+ int instance;
+};
+
+/* cf. Table 11-1 "Boot Modes" in UG1085 Zynq UltraScale+ Device TRM */
+static struct zynqmp_bootsource boot_modes[] = {
+ { .src = BOOTSOURCE_JTAG, .instance = 0 },
+ { .src = BOOTSOURCE_SPI, .instance = 0 },
+ { .src = BOOTSOURCE_SPI, .instance = 0 },
+ { .src = BOOTSOURCE_MMC, .instance = 0 },
+ { .src = BOOTSOURCE_SPI_NAND, .instance = 0 },
+ { .src = BOOTSOURCE_MMC, .instance = 1 },
+ { .src = BOOTSOURCE_MMC, .instance = 0 },
+ { .src = BOOTSOURCE_USB, .instance = 0 },
+ { .src = BOOTSOURCE_JTAG, .instance = 0 },
+ { .src = BOOTSOURCE_JTAG, .instance = 0 },
+ { .src = BOOTSOURCE_UNKNOWN, .instance = 0 },
+ { .src = BOOTSOURCE_UNKNOWN, .instance = 0 },
+ { .src = BOOTSOURCE_UNKNOWN, .instance = 0 },
+ { .src = BOOTSOURCE_UNKNOWN, .instance = 0 },
+ { .src = BOOTSOURCE_MMC, .instance = 1 },
+};
+
+static enum bootsource zynqmp_bootsource(void)
+{
+ u32 v;
+
+ v = readl(ZYNQMP_CRL_APB_BOOT_MODE_USER);
+ v &= 0x0F;
+
+ if (v >= ARRAY_SIZE(boot_modes))
+ return BOOTSOURCE_UNKNOWN;
+
+ bootsource_set(boot_modes[v].src);
+ bootsource_set_instance(boot_modes[v].instance);
+
+ return boot_modes[v].src;
+}
+
struct zynqmp_reset_reason {
u32 mask;
enum reset_src_type type;
@@ -65,6 +107,7 @@ static enum reset_src_type zynqmp_get_reset_src(void)
static int zynqmp_init(void)
{
+ zynqmp_bootsource();
reset_source_set(zynqmp_get_reset_src());
return 0;
--
2.17.1
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