Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a1e7e636fe9fff531a4fc42e65c8e8416fde5220
Commit: a1e7e636fe9fff531a4fc42e65c8e8416fde5220
Parent: 8f81dd149806bc53c68c92f34d61f88427079039
Author: Bjorn Helgaas <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:36:00 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:15:23 2007 -0700
PNP: workaround HP BIOS defect that leaves SMCF010 device partly enabled
Some HP/Compaq firmware reports via ACPI that the SMCF010 IR device is
enabled, but in fact, it leaves the device partly disabled.
HP nw8240 BIOS 68DTV Ver. F.0F, released 9/15/2005 is one BIOS that has
this
problem.
Signed-off-by: Bjorn Helgaas <[EMAIL PROTECTED]>
Cc: Keith Owens <[EMAIL PROTECTED]>
Cc: Len Brown <[EMAIL PROTECTED]>
Cc: Adam Belay <[EMAIL PROTECTED]>
Cc: Matthieu CASTET <[EMAIL PROTECTED]>
Cc: Jean Tourrilhes <[EMAIL PROTECTED]>
Cc: Matthew Garrett <[EMAIL PROTECTED]>
Cc: Ville Syrjala <[EMAIL PROTECTED]>
Cc: Russell King <[EMAIL PROTECTED]>
Cc: Samuel Ortiz <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/pnp/quirks.c | 30 ++++++++++++++++++++++++++++++
1 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
index e97ecef..277df50 100644
--- a/drivers/pnp/quirks.c
+++ b/drivers/pnp/quirks.c
@@ -16,6 +16,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/pnp.h>
+#include <linux/io.h>
#include "base.h"
@@ -106,6 +107,34 @@ static void quirk_sb16audio_resources(struct pnp_dev *dev)
return;
}
+static void quirk_smc_enable(struct pnp_dev *dev)
+{
+ unsigned int firbase;
+
+ if (!dev->active || !pnp_port_valid(dev, 1))
+ return;
+
+ /*
+ * On the HP/Compaq nw8240 (and probably other similar machines),
+ * there is an SMCF010 device with two I/O port regions:
+ *
+ * 0x3e8-0x3ef SIR
+ * 0x100-0x10f FIR
+ *
+ * _STA reports the device is enabled, but in fact, the BIOS
+ * neglects to enable the FIR range. Fortunately, it does fully
+ * enable the device if we call _SRS.
+ */
+ firbase = pnp_port_start(dev, 1);
+ if (inb(firbase + 0x7 /* IRCC_MASTER */) == 0xff) {
+ pnp_err("%s (%s) enabled but not responding, disabling and "
+ "re-enabling", dev->dev.bus_id, pnp_dev_name(dev));
+ pnp_disable_dev(dev);
+ pnp_activate_dev(dev);
+ }
+}
+
+
/*
* PnP Quirks
* Cards or devices that need some tweaking due to incomplete resource info
@@ -126,6 +155,7 @@ static struct pnp_fixup pnp_fixups[] = {
{ "CTL0043", quirk_sb16audio_resources },
{ "CTL0044", quirk_sb16audio_resources },
{ "CTL0045", quirk_sb16audio_resources },
+ { "SMCf010", quirk_smc_enable },
{ "" }
};
-
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