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cs5535: move VSA2 checks into linux/cs5535.h

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Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andres Salomon 2009-12-14 18:00:40 -08:00 • committed by Linus Torvalds
parent 2e8c12436f
commit f060f27007
6 changed files with 36 additions and 45 deletions
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32
include/linux/cs5535.h
View file

@ -36,6 +36,38 @@
#define LBAR_ACPI_SIZE 0x40
#define LBAR_PMS_SIZE 0x80
/* 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_VR_MEM_SIZE 0x0200
#define AMD_VSA_SIG 0x4132 /* signature is ascii 'VSA2' */
#define GSW_VSA_SIG 0x534d /* General Software signature */
#include <linux/io.h>
static inline int cs5535_has_vsa2(void)
{
static int has_vsa2 = -1;
if (has_vsa2 == -1) {
uint16_t val;
/*
* The VSA has virtual registers that we can query for a
* signature.
*/
outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
val = inw(VSA_VRC_DATA);
has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG);
}
return has_vsa2;
}
/* GPIOs */
#define GPIO_OUTPUT_VAL 0x00
#define GPIO_OUTPUT_ENABLE 0x04