diff options
| -rw-r--r-- | include/asm-x86/geode.h | 19 |
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 |