There are currently 3 versions of the zoom2 board.
The production board, that is currently being released.
The beta board, similar in form to the production board but not released.
The alpha board, a set of PCBs with a very limited circulation.
GPIO 94 is used to determine the version of the board. If GPIO 94 is clear,
the board is a production board, otherwise it is a beta board.
The alpha board will likely be mistaken for a beta board. An alpha board
was unavailible for testing.
This has been tested on the beta and production boards.
Signed-off-by: Tom Rix <tom....@windriver.com>
---
board/omap3/zoom2/zoom2.c | 62 ++++++++++++++++++++++++++++++++++++++++++--
board/omap3/zoom2/zoom2.h | 9 ++++++
2 files changed, 68 insertions(+), 3 deletions(-)
diff --git a/board/omap3/zoom2/zoom2.c b/board/omap3/zoom2/zoom2.c
index e5c248d..94231da 100644
--- a/board/omap3/zoom2/zoom2.c
+++ b/board/omap3/zoom2/zoom2.c
@@ -33,6 +33,7 @@
#include <status_led.h>
#endif
#include <asm/io.h>
+#include <asm/arch/gpio.h>
#include <asm/arch/mem.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
@@ -60,6 +61,60 @@ static u32 gpmc_serial_TL16CP754C[GPMC_MAX_REG] = {
0x1D0904C4, 0
};
+/* Used to track the revision of the board */
+static ZOOM2_REVISION zoom2_revision = ZOOM2_REVISION_UNKNOWN;
+
+/*
+ * Routine: zoom2_get_revision
+ * Description: Return the revision of the Zoom2 this code is running on.
+ */
+ZOOM2_REVISION zoom2_get_revision(void)
+{
+ return zoom2_revision;
+}
+
+/*
+ * Routine: zoom2_identify
+ * Description: Detect which version of Zoom2 we are running on.
+ */
+void zoom2_identify(void)
+{
+ /*
+ * To check for production board vs beta board,
+ * check if gpio 94 is clear.
+ *
+ * No way yet to check for alpha board identity.
+ * Alpha boards were produced in very limited quantities
+ * and they are not commonly used. They are mentioned here
+ * only for completeness.
+ */
+ if (!omap_request_gpio(94)) {
+ unsigned int val;
+
+ omap_set_gpio_direction(94, 1);
+ val = omap_get_gpio_datain(94);
+ omap_free_gpio(94);
+
+ if (val)
+ zoom2_revision = ZOOM2_REVISION_BETA;
+ else
+ zoom2_revision = ZOOM2_REVISION_PRODUCTION;
+ }
+
+ printf("Board revision ");
+ switch (zoom2_revision) {
+ case (ZOOM2_REVISION_PRODUCTION):
+ printf("Production\n");
+ break;
+ case (ZOOM2_REVISION_BETA):
+ printf("Beta\n");
+ break;
+ default:
+ printf("Unknown\n");
+ break;
+ }
+}
+
/*
* Routine: board_init
* Description: Early hardware init.
@@ -96,10 +151,11 @@ int board_init (void)
* Routine: misc_init_r
* Description: Configure zoom board specific configurations
*/
-int misc_init_r (void)
+int misc_init_r(void)
{
- power_init_r ();
- dieid_num_r ();
+ zoom2_identify();
+ power_init_r();
+ dieid_num_r();
return 0;
}
diff --git a/board/omap3/zoom2/zoom2.h b/board/omap3/zoom2/zoom2.h
index cae8a7a..b12b0fa 100644
--- a/board/omap3/zoom2/zoom2.h
+++ b/board/omap3/zoom2/zoom2.h
@@ -32,6 +32,15 @@ const omap3_sysinfo sysinfo = {
"NAND",
};
+typedef enum {
+ ZOOM2_REVISION_UNKNOWN = 0,
+ ZOOM2_REVISION_ALPHA,
+ ZOOM2_REVISION_BETA,
+ ZOOM2_REVISION_PRODUCTION
+} ZOOM2_REVISION;
+
+extern ZOOM2_REVISION zoom2_get_revision(void);
+
/*
* IEN - Input Enable
* IDIS - Input Disable
--
1.6.0.5
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