[U-Boot] [PATCH 3/4 v3] omap3evm: Add board revision function

Ajay Kumar Gupta
2010-06-10T05:50:49Z

Added function to differentiate between the OMAP3EVM revisions. The
chip-id of the ethernet PHY is being used for this purpose.

Rev A to D : 0x01150000
Rev >= E : 0x92200000

CC: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
---
No change from v2.

board/ti/evm/evm.c | 30 ++++++++++++++++++++++++++++++
board/ti/evm/evm.h | 14 ++++++++++++++
2 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/board/ti/evm/evm.c b/board/ti/evm/evm.c
index 0718a08..fcc1803 100644
--- a/board/ti/evm/evm.c
+++ b/board/ti/evm/evm.c
@@ -37,6 +37,33 @@
#include <asm/mach-types.h>
#include "evm.h"

+static u8 omap3_evm_version;
+
+u8 get_omap3_evm_rev(void)
+{
+ return omap3_evm_version;
+}
+
+static void omap3_evm_get_revision(void)
+{
+ unsigned int smsc_id;
+
+ /* Ethernet PHY ID is stored at ID_REV register */
+ smsc_id = readl(CONFIG_SMC911X_BASE + 0x50) & 0xFFFF0000;
+ printf("Read back SMSC id 0x%x\n", smsc_id);
+
+ switch (smsc_id) {
+ /* SMSC9115 chipset */
+ case 0x01150000:
+ omap3_evm_version = OMAP3EVM_BOARD_GEN_1;
+ break;
+ /* SMSC 9220 chipset */
+ case 0x92200000:
+ default:
+ omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
+ }
+}
+
/*
* Routine: board_init
* Description: Early hardware init.
@@ -121,6 +148,9 @@ static void setup_net_chip(void)
writel(GPIO0, &gpio3_base->cleardataout);
udelay(1);
writel(GPIO0, &gpio3_base->setdataout);
+
+ /* determine omap3evm revision */
+ omap3_evm_get_revision();
}

int board_eth_init(bd_t *bis)
diff --git a/board/ti/evm/evm.h b/board/ti/evm/evm.h
index 37da29d..e2581f6 100644
--- a/board/ti/evm/evm.h
+++ b/board/ti/evm/evm.h
@@ -33,6 +33,20 @@ const omap3_sysinfo sysinfo = {
#endif
};

+/*
+ * OMAP35x EVM revision
+ * Run time detection of EVM revision is done by reading Ethernet
+ * PHY ID -
+ * GEN_1 = 0x01150000
+ * GEN_2 = 0x92200000
+ */
+enum {
+ OMAP3EVM_BOARD_GEN_1 = 0, /* EVM Rev between A - D */
+ OMAP3EVM_BOARD_GEN_2, /* EVM Rev >= Rev E */
+};
+
+u8 get_omap3_evm_rev(void);
+
static void setup_net_chip(void);

/*
--
1.6.2.4