Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bfe0c1cc6456bba1f4e3cc1fe29c0ea578ac763a
Commit: bfe0c1cc6456bba1f4e3cc1fe29c0ea578ac763a
Parent: 59c69f2a51b41e9886b85f61c04e8d0d2a35f37b
Author: Venki Pallipadi <[EMAIL PROTECTED]>
AuthorDate: Fri Oct 12 23:04:24 2007 +0200
Committer: Thomas Gleixner <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 23:04:24 2007 +0200
x86: HPET force enable for ICH5
force_enable hpet for ICH5.
[ Build fixes from Andrew Morton ]
Signed-off-by: Venkatesh Pallipadi <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: john stultz <[EMAIL PROTECTED]>
Cc: Greg KH <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Arjan van de Ven <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
arch/x86/kernel/hpet.c | 2 +-
arch/x86/kernel/quirks.c | 103 +++++++++++++++++++++++++++++++++++++++++++++-
include/asm-x86/hpet.h | 2 +-
include/linux/pci_ids.h | 1 +
4 files changed, 105 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index a6c6891..f836707 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -181,7 +181,7 @@ static void hpet_start_counter(void)
static void hpet_resume_device(void)
{
- ich_force_hpet_resume();
+ force_hpet_resume();
}
static void hpet_restart_counter(void)
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index d3ac703..79133b1 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -53,9 +53,15 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_E7520_MCH, quir
#if defined(CONFIG_HPET_TIMER)
unsigned long force_hpet_address;
+static enum {
+ NONE_FORCE_HPET_RESUME,
+ OLD_ICH_FORCE_HPET_RESUME,
+ ICH_FORCE_HPET_RESUME
+} force_hpet_resume_type;
+
static void __iomem *rcba_base;
-void ich_force_hpet_resume(void)
+static void ich_force_hpet_resume(void)
{
u32 val;
@@ -133,6 +139,7 @@ static void ich_force_enable_hpet(struct pci_dev *dev)
iounmap(rcba_base);
printk(KERN_DEBUG "Failed to force enable HPET\n");
} else {
+ force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
force_hpet_address);
}
@@ -148,4 +155,98 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_ICH7_31,
ich_force_enable_hpet);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
ich_force_enable_hpet);
+
+
+static struct pci_dev *cached_dev;
+
+static void old_ich_force_hpet_resume(void)
+{
+ u32 val;
+ u32 uninitialized_var(gen_cntl);
+
+ if (!force_hpet_address || !cached_dev)
+ return;
+
+ pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
+ gen_cntl &= (~(0x7 << 15));
+ gen_cntl |= (0x4 << 15);
+
+ pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
+ pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
+ val = gen_cntl >> 15;
+ val &= 0x7;
+ if (val == 0x4)
+ printk(KERN_DEBUG "Force enabled HPET at resume\n");
+ else
+ BUG();
+}
+
+static void old_ich_force_enable_hpet(struct pci_dev *dev)
+{
+ u32 val;
+ u32 uninitialized_var(gen_cntl);
+
+ if (hpet_address || force_hpet_address)
+ return;
+
+ pci_read_config_dword(dev, 0xD0, &gen_cntl);
+ /*
+ * Bit 17 is HPET enable bit.
+ * Bit 16:15 control the HPET base address.
+ */
+ val = gen_cntl >> 15;
+ val &= 0x7;
+ if (val & 0x4) {
+ val &= 0x3;
+ force_hpet_address = 0xFED00000 | (val << 12);
+ printk(KERN_DEBUG "HPET at base address 0x%lx\n",
+ force_hpet_address);
+ cached_dev = dev;
+ return;
+ }
+
+ /*
+ * HPET is disabled. Trying enabling at FED00000 and check
+ * whether it sticks
+ */
+ gen_cntl &= (~(0x7 << 15));
+ gen_cntl |= (0x4 << 15);
+ pci_write_config_dword(dev, 0xD0, gen_cntl);
+
+ pci_read_config_dword(dev, 0xD0, &gen_cntl);
+
+ val = gen_cntl >> 15;
+ val &= 0x7;
+ if (val & 0x4) {
+ /* HPET is enabled in HPTC. Just not reported by BIOS */
+ val &= 0x3;
+ force_hpet_address = 0xFED00000 | (val << 12);
+ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
+ force_hpet_address);
+ force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
+ return;
+ }
+
+ printk(KERN_DEBUG "Failed to force enable HPET\n");
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
+ old_ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
+ old_ich_force_enable_hpet);
+
+void force_hpet_resume(void)
+{
+ switch (force_hpet_resume_type) {
+ case ICH_FORCE_HPET_RESUME:
+ return ich_force_hpet_resume();
+
+ case OLD_ICH_FORCE_HPET_RESUME:
+ return old_ich_force_hpet_resume();
+
+ default:
+ break;
+ }
+}
+
#endif
diff --git a/include/asm-x86/hpet.h b/include/asm-x86/hpet.h
index 47de4b8..d4ab6db 100644
--- a/include/asm-x86/hpet.h
+++ b/include/asm-x86/hpet.h
@@ -67,7 +67,7 @@ extern unsigned long force_hpet_address;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
extern unsigned long hpet_readl(unsigned long a);
-extern void ich_force_hpet_resume(void);
+extern void force_hpet_resume(void);
#ifdef CONFIG_HPET_EMULATE_RTC
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 3948708..584741b 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2242,6 +2242,7 @@
#define PCI_DEVICE_ID_INTEL_82801EB_5 0x24d5
#define PCI_DEVICE_ID_INTEL_82801EB_6 0x24d6
#define PCI_DEVICE_ID_INTEL_82801EB_11 0x24db
+#define PCI_DEVICE_ID_INTEL_82801EB_12 0x24dc
#define PCI_DEVICE_ID_INTEL_82801EB_13 0x24dd
#define PCI_DEVICE_ID_INTEL_ESB_1 0x25a1
#define PCI_DEVICE_ID_INTEL_ESB_2 0x25a2
-
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