2 * This file contains work-arounds for x86 and x86_64 platform bugs.
9 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
11 static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
16 /* BIOS may enable hardware IRQ balancing for
17 * E7520/E7320/E7525(revision ID 0x9 and below)
19 * Disable SW irqbalance/affinity on those platforms.
21 pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
25 /* enable access to config space*/
26 pci_read_config_byte(dev, 0xf4, &config);
27 pci_write_config_byte(dev, 0xf4, config|0x2);
29 /* read xTPR register */
30 raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
32 if (!(word & (1 << 13))) {
33 printk(KERN_INFO "Intel E7520/7320/7525 detected. "
34 "Disabling irq balancing and affinity\n");
35 #ifdef CONFIG_IRQBALANCE
36 irqbalance_disable("");
44 /* put back the original value for config space*/
46 pci_write_config_byte(dev, 0xf4, config);
48 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH,
49 quirk_intel_irqbalance);
50 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH,
51 quirk_intel_irqbalance);
52 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH,
53 quirk_intel_irqbalance);
56 #if defined(CONFIG_HPET_TIMER)
57 unsigned long force_hpet_address;
60 NONE_FORCE_HPET_RESUME,
61 OLD_ICH_FORCE_HPET_RESUME,
63 } force_hpet_resume_type;
65 static void __iomem *rcba_base;
67 static void ich_force_hpet_resume(void)
71 if (!force_hpet_address)
74 if (rcba_base == NULL)
77 /* read the Function Disable register, dword mode only */
78 val = readl(rcba_base + 0x3404);
80 /* HPET disabled in HPTC. Trying to enable */
81 writel(val | 0x80, rcba_base + 0x3404);
84 val = readl(rcba_base + 0x3404);
88 printk(KERN_DEBUG "Force enabled HPET at resume\n");
93 static void ich_force_enable_hpet(struct pci_dev *dev)
96 u32 uninitialized_var(rcba);
99 if (hpet_address || force_hpet_address)
102 pci_read_config_dword(dev, 0xF0, &rcba);
105 printk(KERN_DEBUG "RCBA disabled. Cannot force enable HPET\n");
109 /* use bits 31:14, 16 kB aligned */
110 rcba_base = ioremap_nocache(rcba, 0x4000);
111 if (rcba_base == NULL) {
112 printk(KERN_DEBUG "ioremap failed. Cannot force enable HPET\n");
116 /* read the Function Disable register, dword mode only */
117 val = readl(rcba_base + 0x3404);
120 /* HPET is enabled in HPTC. Just not reported by BIOS */
122 force_hpet_address = 0xFED00000 | (val << 12);
123 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
129 /* HPET disabled in HPTC. Trying to enable */
130 writel(val | 0x80, rcba_base + 0x3404);
132 val = readl(rcba_base + 0x3404);
137 force_hpet_address = 0xFED00000 | (val << 12);
141 force_hpet_address = 0;
143 printk(KERN_DEBUG "Failed to force enable HPET\n");
145 force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
146 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
151 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
152 ich_force_enable_hpet);
153 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
154 ich_force_enable_hpet);
155 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
156 ich_force_enable_hpet);
157 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
158 ich_force_enable_hpet);
159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
160 ich_force_enable_hpet);
161 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
162 ich_force_enable_hpet);
165 static struct pci_dev *cached_dev;
167 static void old_ich_force_hpet_resume(void)
170 u32 uninitialized_var(gen_cntl);
172 if (!force_hpet_address || !cached_dev)
175 pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
176 gen_cntl &= (~(0x7 << 15));
177 gen_cntl |= (0x4 << 15);
179 pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
180 pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
181 val = gen_cntl >> 15;
184 printk(KERN_DEBUG "Force enabled HPET at resume\n");
189 static void old_ich_force_enable_hpet(struct pci_dev *dev)
192 u32 uninitialized_var(gen_cntl);
194 if (hpet_address || force_hpet_address)
197 pci_read_config_dword(dev, 0xD0, &gen_cntl);
199 * Bit 17 is HPET enable bit.
200 * Bit 16:15 control the HPET base address.
202 val = gen_cntl >> 15;
206 force_hpet_address = 0xFED00000 | (val << 12);
207 printk(KERN_DEBUG "HPET at base address 0x%lx\n",
213 * HPET is disabled. Trying enabling at FED00000 and check
216 gen_cntl &= (~(0x7 << 15));
217 gen_cntl |= (0x4 << 15);
218 pci_write_config_dword(dev, 0xD0, gen_cntl);
220 pci_read_config_dword(dev, 0xD0, &gen_cntl);
222 val = gen_cntl >> 15;
225 /* HPET is enabled in HPTC. Just not reported by BIOS */
227 force_hpet_address = 0xFED00000 | (val << 12);
228 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
231 force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
235 printk(KERN_DEBUG "Failed to force enable HPET\n");
238 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
239 old_ich_force_enable_hpet);
240 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
241 old_ich_force_enable_hpet);
243 void force_hpet_resume(void)
245 switch (force_hpet_resume_type) {
246 case ICH_FORCE_HPET_RESUME:
247 return ich_force_hpet_resume();
249 case OLD_ICH_FORCE_HPET_RESUME:
250 return old_ich_force_hpet_resume();