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https://github.com/edk2-porting/linux-next.git
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1b82ba6e47
Add support to force_hpet for all known MCP55 (nForce 5) chipset LPC bridges. These are the untested nForce 5 chips (taken from Mikko's original patch, and checked against pci.ids). Signed-off-by: Carlos Corbacho <cathectic@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> arch/x86/kernel/quirks.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
396 lines
10 KiB
C
396 lines
10 KiB
C
/*
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* This file contains work-arounds for x86 and x86_64 platform bugs.
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*/
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#include <linux/pci.h>
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#include <linux/irq.h>
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#include <asm/hpet.h>
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#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
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static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
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{
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u8 config, rev;
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u32 word;
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/* BIOS may enable hardware IRQ balancing for
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* E7520/E7320/E7525(revision ID 0x9 and below)
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* based platforms.
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* Disable SW irqbalance/affinity on those platforms.
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*/
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pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
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if (rev > 0x9)
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return;
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/* enable access to config space*/
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pci_read_config_byte(dev, 0xf4, &config);
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pci_write_config_byte(dev, 0xf4, config|0x2);
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/* read xTPR register */
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raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
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if (!(word & (1 << 13))) {
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printk(KERN_INFO "Intel E7520/7320/7525 detected. "
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"Disabling irq balancing and affinity\n");
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#ifdef CONFIG_IRQBALANCE
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irqbalance_disable("");
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#endif
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noirqdebug_setup("");
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#ifdef CONFIG_PROC_FS
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no_irq_affinity = 1;
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#endif
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}
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/* put back the original value for config space*/
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if (!(config & 0x2))
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pci_write_config_byte(dev, 0xf4, config);
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}
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DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH,
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quirk_intel_irqbalance);
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DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH,
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quirk_intel_irqbalance);
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DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH,
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quirk_intel_irqbalance);
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#endif
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#if defined(CONFIG_HPET_TIMER)
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unsigned long force_hpet_address;
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static enum {
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NONE_FORCE_HPET_RESUME,
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OLD_ICH_FORCE_HPET_RESUME,
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ICH_FORCE_HPET_RESUME,
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VT8237_FORCE_HPET_RESUME,
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NVIDIA_FORCE_HPET_RESUME,
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} force_hpet_resume_type;
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static void __iomem *rcba_base;
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static void ich_force_hpet_resume(void)
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{
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u32 val;
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if (!force_hpet_address)
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return;
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if (rcba_base == NULL)
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BUG();
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/* read the Function Disable register, dword mode only */
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val = readl(rcba_base + 0x3404);
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if (!(val & 0x80)) {
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/* HPET disabled in HPTC. Trying to enable */
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writel(val | 0x80, rcba_base + 0x3404);
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}
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val = readl(rcba_base + 0x3404);
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if (!(val & 0x80))
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BUG();
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else
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printk(KERN_DEBUG "Force enabled HPET at resume\n");
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return;
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}
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static void ich_force_enable_hpet(struct pci_dev *dev)
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{
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u32 val;
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u32 uninitialized_var(rcba);
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int err = 0;
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if (hpet_address || force_hpet_address)
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return;
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pci_read_config_dword(dev, 0xF0, &rcba);
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rcba &= 0xFFFFC000;
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if (rcba == 0) {
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printk(KERN_DEBUG "RCBA disabled. Cannot force enable HPET\n");
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return;
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}
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/* use bits 31:14, 16 kB aligned */
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rcba_base = ioremap_nocache(rcba, 0x4000);
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if (rcba_base == NULL) {
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printk(KERN_DEBUG "ioremap failed. Cannot force enable HPET\n");
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return;
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}
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/* read the Function Disable register, dword mode only */
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val = readl(rcba_base + 0x3404);
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if (val & 0x80) {
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/* HPET is enabled in HPTC. Just not reported by BIOS */
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val = val & 0x3;
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force_hpet_address = 0xFED00000 | (val << 12);
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printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
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force_hpet_address);
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iounmap(rcba_base);
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return;
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}
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/* HPET disabled in HPTC. Trying to enable */
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writel(val | 0x80, rcba_base + 0x3404);
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val = readl(rcba_base + 0x3404);
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if (!(val & 0x80)) {
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err = 1;
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} else {
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val = val & 0x3;
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force_hpet_address = 0xFED00000 | (val << 12);
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}
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if (err) {
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force_hpet_address = 0;
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iounmap(rcba_base);
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printk(KERN_DEBUG "Failed to force enable HPET\n");
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} else {
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force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
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printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
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force_hpet_address);
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}
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
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ich_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
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ich_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
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ich_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
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ich_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
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ich_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
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ich_force_enable_hpet);
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static struct pci_dev *cached_dev;
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static void old_ich_force_hpet_resume(void)
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{
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u32 val;
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u32 uninitialized_var(gen_cntl);
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if (!force_hpet_address || !cached_dev)
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return;
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pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
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gen_cntl &= (~(0x7 << 15));
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gen_cntl |= (0x4 << 15);
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pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
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pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
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val = gen_cntl >> 15;
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val &= 0x7;
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if (val == 0x4)
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printk(KERN_DEBUG "Force enabled HPET at resume\n");
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else
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BUG();
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}
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static void old_ich_force_enable_hpet(struct pci_dev *dev)
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{
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u32 val;
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u32 uninitialized_var(gen_cntl);
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if (hpet_address || force_hpet_address)
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return;
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pci_read_config_dword(dev, 0xD0, &gen_cntl);
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/*
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* Bit 17 is HPET enable bit.
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* Bit 16:15 control the HPET base address.
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*/
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val = gen_cntl >> 15;
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val &= 0x7;
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if (val & 0x4) {
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val &= 0x3;
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force_hpet_address = 0xFED00000 | (val << 12);
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printk(KERN_DEBUG "HPET at base address 0x%lx\n",
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force_hpet_address);
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return;
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}
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/*
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* HPET is disabled. Trying enabling at FED00000 and check
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* whether it sticks
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*/
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gen_cntl &= (~(0x7 << 15));
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gen_cntl |= (0x4 << 15);
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pci_write_config_dword(dev, 0xD0, gen_cntl);
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pci_read_config_dword(dev, 0xD0, &gen_cntl);
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val = gen_cntl >> 15;
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val &= 0x7;
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if (val & 0x4) {
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/* HPET is enabled in HPTC. Just not reported by BIOS */
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val &= 0x3;
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force_hpet_address = 0xFED00000 | (val << 12);
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printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
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force_hpet_address);
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cached_dev = dev;
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force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
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return;
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}
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printk(KERN_DEBUG "Failed to force enable HPET\n");
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}
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/*
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* Undocumented chipset features. Make sure that the user enforced
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* this.
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*/
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static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
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{
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if (hpet_force_user)
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old_ich_force_enable_hpet(dev);
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
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old_ich_force_enable_hpet_user);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
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old_ich_force_enable_hpet_user);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
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old_ich_force_enable_hpet_user);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
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old_ich_force_enable_hpet_user);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
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old_ich_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
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old_ich_force_enable_hpet);
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static void vt8237_force_hpet_resume(void)
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{
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u32 val;
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if (!force_hpet_address || !cached_dev)
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return;
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val = 0xfed00000 | 0x80;
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pci_write_config_dword(cached_dev, 0x68, val);
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pci_read_config_dword(cached_dev, 0x68, &val);
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if (val & 0x80)
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printk(KERN_DEBUG "Force enabled HPET at resume\n");
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else
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BUG();
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}
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static void vt8237_force_enable_hpet(struct pci_dev *dev)
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{
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u32 uninitialized_var(val);
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if (!hpet_force_user || hpet_address || force_hpet_address)
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return;
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pci_read_config_dword(dev, 0x68, &val);
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/*
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* Bit 7 is HPET enable bit.
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* Bit 31:10 is HPET base address (contrary to what datasheet claims)
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*/
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if (val & 0x80) {
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force_hpet_address = (val & ~0x3ff);
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printk(KERN_DEBUG "HPET at base address 0x%lx\n",
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force_hpet_address);
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return;
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}
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/*
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* HPET is disabled. Trying enabling at FED00000 and check
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* whether it sticks
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*/
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val = 0xfed00000 | 0x80;
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pci_write_config_dword(dev, 0x68, val);
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pci_read_config_dword(dev, 0x68, &val);
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if (val & 0x80) {
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force_hpet_address = (val & ~0x3ff);
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printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
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force_hpet_address);
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cached_dev = dev;
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force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
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return;
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}
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printk(KERN_DEBUG "Failed to force enable HPET\n");
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
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vt8237_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
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vt8237_force_enable_hpet);
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/*
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* Undocumented chipset feature taken from LinuxBIOS.
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*/
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static void nvidia_force_hpet_resume(void)
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{
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pci_write_config_dword(cached_dev, 0x44, 0xfed00001);
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printk(KERN_DEBUG "Force enabled HPET at resume\n");
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}
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static void nvidia_force_enable_hpet(struct pci_dev *dev)
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{
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u32 uninitialized_var(val);
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if (!hpet_force_user || hpet_address || force_hpet_address)
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return;
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pci_write_config_dword(dev, 0x44, 0xfed00001);
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pci_read_config_dword(dev, 0x44, &val);
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force_hpet_address = val & 0xfffffffe;
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force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
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printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
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force_hpet_address);
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cached_dev = dev;
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return;
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}
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/* ISA Bridges */
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0050,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0051,
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nvidia_force_enable_hpet);
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/* LPC bridges */
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0362,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0363,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0364,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0365,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0366,
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nvidia_force_enable_hpet);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0367,
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nvidia_force_enable_hpet);
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void force_hpet_resume(void)
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{
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switch (force_hpet_resume_type) {
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case ICH_FORCE_HPET_RESUME:
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return ich_force_hpet_resume();
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case OLD_ICH_FORCE_HPET_RESUME:
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return old_ich_force_hpet_resume();
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case VT8237_FORCE_HPET_RESUME:
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return vt8237_force_hpet_resume();
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case NVIDIA_FORCE_HPET_RESUME:
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return nvidia_force_hpet_resume();
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default:
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break;
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}
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}
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#endif
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