The patch titled
Force enable HPET on VT8235/8237 chipsets
has been removed from the -mm tree. Its filename was
hpet-force-enable-on-vt8235-37-chipsets.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: Force enable HPET on VT8235/8237 chipsets
From: "Udo A. Steinberg" <[EMAIL PROTECTED]>
This patch adds quirks to force enable HPET on Via VT8235 and VT8237 chipsets.
The datasheet for 8237 documents HPET functionality (although wrongly)
whereas HPET is undocumented for 8235.
Tested on A7V880 (8237) and K7VT4A+ (8235) boards.
Signed-off-by: Udo A. Steinberg <[EMAIL PROTECTED]>
Cc: Venkatesh Pallipadi <[EMAIL PROTECTED]>
Cc: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: john stultz <[EMAIL PROTECTED]>
Cc: Greg KH <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
arch/i386/kernel/quirks.c | 68 +++++++++++++++++++++++++++++++++++-
1 file changed, 67 insertions(+), 1 deletion(-)
diff -puN arch/i386/kernel/quirks.c~hpet-force-enable-on-vt8235-37-chipsets
arch/i386/kernel/quirks.c
--- a/arch/x86/kernel/quirks.c~hpet-force-enable-on-vt8235-37-chipsets
+++ a/arch/x86/kernel/quirks.c
@@ -56,7 +56,8 @@ unsigned long force_hpet_address;
static enum {
NONE_FORCE_HPET_RESUME,
OLD_ICH_FORCE_HPET_RESUME,
- ICH_FORCE_HPET_RESUME
+ ICH_FORCE_HPET_RESUME,
+ VT8237_FORCE_HPET_RESUME
} force_hpet_resume_type;
static void __iomem *rcba_base;
@@ -237,6 +238,68 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_I
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
old_ich_force_enable_hpet);
+
+static void vt8237_force_hpet_resume(void)
+{
+ u32 val;
+
+ if (!force_hpet_address || !cached_dev)
+ return;
+
+ val = 0xfed00000 | 0x80;
+ pci_write_config_dword(cached_dev, 0x68, val);
+
+ pci_read_config_dword(cached_dev, 0x68, &val);
+ if (val & 0x80)
+ printk(KERN_DEBUG "Force enabled HPET at resume\n");
+ else
+ BUG();
+}
+
+static void vt8237_force_enable_hpet(struct pci_dev *dev)
+{
+ u32 uninitialized_var(val);
+
+ if (hpet_address || force_hpet_address)
+ return;
+
+ pci_read_config_dword(dev, 0x68, &val);
+ /*
+ * Bit 7 is HPET enable bit.
+ * Bit 31:10 is HPET base address (contrary to what datasheet claims)
+ */
+ if (val & 0x80) {
+ force_hpet_address = (val & ~0x3ff);
+ printk(KERN_DEBUG "HPET at base address 0x%lx\n",
+ force_hpet_address);
+ return;
+ }
+
+ /*
+ * HPET is disabled. Trying enabling at FED00000 and check
+ * whether it sticks
+ */
+ val = 0xfed00000 | 0x80;
+ pci_write_config_dword(dev, 0x68, val);
+
+ pci_read_config_dword(dev, 0x68, &val);
+ if (val & 0x80) {
+ force_hpet_address = (val & ~0x3ff);
+ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
+ force_hpet_address);
+ cached_dev = dev;
+ force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
+ return;
+ }
+
+ printk(KERN_DEBUG "Failed to force enable HPET\n");
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
+ vt8237_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
+ vt8237_force_enable_hpet);
+
void force_hpet_resume(void)
{
switch (force_hpet_resume_type) {
@@ -246,6 +309,9 @@ void force_hpet_resume(void)
case OLD_ICH_FORCE_HPET_RESUME:
return old_ich_force_hpet_resume();
+ case VT8237_FORCE_HPET_RESUME:
+ return vt8237_force_hpet_resume();
+
default:
break;
}
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
git-x86.patch
-
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