rpi3: Detect board revision
Implement VideoCore mailbox interface driver and use it to get the board
revision identifier.
For now it is only used to print the model for debug purposes.
This wiki contains the documentation of the mailbox interface:
https://github.com/raspberrypi/firmware/wiki
Change-Id: I11943b99b52cc1409f4a195ebe58eb44ae5b1d6c
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/rpi3/rpi3_bl1_setup.c b/plat/rpi3/rpi3_bl1_setup.c
index c98715b..39bb332 100644
--- a/plat/rpi3/rpi3_bl1_setup.c
+++ b/plat/rpi3/rpi3_bl1_setup.c
@@ -7,6 +7,7 @@
#include <arch.h>
#include <arch_helpers.h>
#include <bl_common.h>
+#include <debug.h>
#include <platform_def.h>
#include <xlat_mmu_helpers.h>
#include <xlat_tables_defs.h>
@@ -56,6 +57,39 @@
void bl1_platform_setup(void)
{
+ uint32_t __unused rev;
+ int __unused rc;
+
+ rc = rpi3_vc_hardware_get_board_revision(&rev);
+
+ if (rc == 0) {
+ const char __unused *model, __unused *info;
+
+ switch (rev) {
+ case 0xA02082:
+ model = "Raspberry Pi 3 Model B";
+ info = "(1GB, Sony, UK)";
+ break;
+ case 0xA22082:
+ model = "Raspberry Pi 3 Model B";
+ info = "(1GB, Embest, China)";
+ break;
+ case 0xA020D3:
+ model = "Raspberry Pi 3 Model B+";
+ info = "(1GB, Sony, UK)";
+ break;
+ default:
+ model = "Unknown";
+ info = "(Unknown)";
+ ERROR("rpi3: Unknown board revision 0x%08x\n", rev);
+ break;
+ }
+
+ NOTICE("rpi3: Detected: %s %s [0x%08x]\n", model, info, rev);
+ } else {
+ ERROR("rpi3: Unable to detect board revision\n");
+ }
+
/* Initialise the IO layer and register platform IO devices */
plat_rpi3_io_setup();
}