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Diffstat (limited to 'include/asm-x86/geode.h')
-rw-r--r--include/asm-x86/geode.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/asm-x86/geode.h b/include/asm-x86/geode.h
index b1bdf637856..3978200f126 100644
--- a/include/asm-x86/geode.h
+++ b/include/asm-x86/geode.h
@@ -103,6 +103,14 @@ extern int geode_get_dev_base(unsigned int dev);
#define PM_AWKD 0x50
#define PM_SSC 0x54
+/* VSA2 magic values */
+
+#define VSA_VRC_INDEX 0xAC1C
+#define VSA_VRC_DATA 0xAC1E
+#define VSA_VR_UNLOCK 0xFC53 /* unlock virtual register */
+#define VSA_VR_SIGNATURE 0x0003
+#define VSA_SIG 0x4132 /* signature is ascii 'VSA2' */
+
/* GPIO */
#define GPIO_OUTPUT_VAL 0x00
@@ -174,6 +182,17 @@ static inline int is_geode(void)
return (is_geode_gx() || is_geode_lx());
}
+/*
+ * The VSA has virtual registers that we can query for a signature.
+ */
+static inline int geode_has_vsa2(void)
+{
+ outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
+ outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
+
+ return (inw(VSA_VRC_DATA) == VSA_SIG);
+}
+
/* MFGPTs */
#define MFGPT_MAX_TIMERS 8