x86: HPET force enable for ICH5

force_enable hpet for ICH5.

[ Build fixes from Andrew Morton ]

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index a6c6891..f836707 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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