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Read virtual switch current values correctly

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As dev switch and recovery switch may be virtual, crossystem has to
distinguish virtual switches from physical ones.

Since to a virtual switch, its current value should always equal to its
boot value, return a boot value when asked for a current value.

Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>

BUG=chrome-os-partner:10007
TEST=crossystem devsw_cur|recoverysw_cur show correct value on Snow

Change-Id: Ia73147ecd5528a3cc5276aff02a632ce4f52ea8b
Reviewed-on: https://gerrit.chromium.org/gerrit/26568
Commit-Ready: Che-Liang Chiou <clchiou@chromium.org>
Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
This commit is contained in:
Che-Liang Chiou
2012-07-02 19:17:53 +08:00
committed by Gerrit
parent d808a43d35
commit 7ec59576f6
1 changed files with 21 additions and 5 deletions
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22
host/arch/arm/lib/crossystem_arch.c
View File

@@ -213,14 +213,17 @@ static int VbGetVarGpio(const char* name) {
ret = ReadFdtBlock(name, &pp, &proplen);
if (ret || !pp || proplen != 12) {
ret = 2;
ret = -1;
goto out;
}
prop = pp;
gpio_num = ntohl(prop[1]);
polarity = ntohl(prop[2]);
if (gpio_num)
ret = VbGetGpioStatus(gpio_num) ^ polarity ^ 1;
else
ret = -1;
out:
if (pp)
free(pp);
@@ -340,6 +343,8 @@ VbSharedDataHeader *VbSharedDataRead(void) {
}
int VbGetArchPropertyInt(const char* name) {
int value;
if (!strcasecmp(name, "fmap_base"))
return ReadFdtInt("fmap-offset");
else if (!strcasecmp(name, "devsw_boot"))
@@ -349,15 +354,26 @@ int VbGetArchPropertyInt(const char* name) {
else if (!strcasecmp(name, "wpsw_boot"))
return ReadFdtBool("boot-write-protect-switch");
else if (!strcasecmp(name, "devsw_cur"))
return VbGetVarGpio("developer-switch");
value = VbGetVarGpio("developer-switch");
else if (!strcasecmp(name, "recoverysw_cur"))
return VbGetVarGpio("recovery-switch");
value = VbGetVarGpio("recovery-switch");
else if (!strcasecmp(name, "wpsw_cur"))
return VbGetVarGpio("write-protect-switch");
else if (!strcasecmp(name, "recoverysw_ec_boot"))
return 0;
else
return -1;
if (value < 0) {
if (!strcasecmp(name, "devsw_cur"))
return ReadFdtBool("boot-developer-switch");
else if (!strcasecmp(name, "recoverysw_cur"))
return ReadFdtBool("boot-recovery-switch");
else
return -1;
} else {
return value;
}
}
const char* VbGetArchPropertyString(const char* name, char* dest, int size) {