x86: force enable HPET on VT8235/8237 chipsets
[deliverable/linux.git] / arch / x86 / kernel / quirks.c
CommitLineData
1da177e4
LT
1/*
2 * This file contains work-arounds for x86 and x86_64 platform bugs.
3 */
1da177e4
LT
4#include <linux/pci.h>
5#include <linux/irq.h>
6
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VP
7#include <asm/hpet.h>
8
1da177e4
LT
9#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
10
a86f34b4 11static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
1da177e4
LT
12{
13 u8 config, rev;
14 u32 word;
15
16 /* BIOS may enable hardware IRQ balancing for
17 * E7520/E7320/E7525(revision ID 0x9 and below)
18 * based platforms.
19 * Disable SW irqbalance/affinity on those platforms.
20 */
a86f34b4 21 pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
1da177e4
LT
22 if (rev > 0x9)
23 return;
24
a86f34b4
AM
25 /* enable access to config space*/
26 pci_read_config_byte(dev, 0xf4, &config);
27 pci_write_config_byte(dev, 0xf4, config|0x2);
1da177e4
LT
28
29 /* read xTPR register */
a86f34b4 30 raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
1da177e4
LT
31
32 if (!(word & (1 << 13))) {
38377be8
DJ
33 printk(KERN_INFO "Intel E7520/7320/7525 detected. "
34 "Disabling irq balancing and affinity\n");
1da177e4
LT
35#ifdef CONFIG_IRQBALANCE
36 irqbalance_disable("");
37#endif
38 noirqdebug_setup("");
39#ifdef CONFIG_PROC_FS
40 no_irq_affinity = 1;
41#endif
42 }
43
a86f34b4 44 /* put back the original value for config space*/
da9bb1d2 45 if (!(config & 0x2))
a86f34b4 46 pci_write_config_byte(dev, 0xf4, config);
1da177e4 47}
76492237
TG
48DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH,
49 quirk_intel_irqbalance);
50DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH,
51 quirk_intel_irqbalance);
52DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH,
53 quirk_intel_irqbalance);
1da177e4 54#endif
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55
56#if defined(CONFIG_HPET_TIMER)
57unsigned long force_hpet_address;
58
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59static enum {
60 NONE_FORCE_HPET_RESUME,
61 OLD_ICH_FORCE_HPET_RESUME,
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US
62 ICH_FORCE_HPET_RESUME,
63 VT8237_FORCE_HPET_RESUME
bfe0c1cc
VP
64} force_hpet_resume_type;
65
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66static void __iomem *rcba_base;
67
bfe0c1cc 68static void ich_force_hpet_resume(void)
d54bd57d
VP
69{
70 u32 val;
71
72 if (!force_hpet_address)
73 return;
74
75 if (rcba_base == NULL)
76 BUG();
77
78 /* read the Function Disable register, dword mode only */
79 val = readl(rcba_base + 0x3404);
80 if (!(val & 0x80)) {
81 /* HPET disabled in HPTC. Trying to enable */
82 writel(val | 0x80, rcba_base + 0x3404);
83 }
84
85 val = readl(rcba_base + 0x3404);
86 if (!(val & 0x80))
87 BUG();
88 else
89 printk(KERN_DEBUG "Force enabled HPET at resume\n");
90
91 return;
92}
93
94static void ich_force_enable_hpet(struct pci_dev *dev)
95{
96 u32 val;
97 u32 uninitialized_var(rcba);
98 int err = 0;
99
100 if (hpet_address || force_hpet_address)
101 return;
102
103 pci_read_config_dword(dev, 0xF0, &rcba);
104 rcba &= 0xFFFFC000;
105 if (rcba == 0) {
106 printk(KERN_DEBUG "RCBA disabled. Cannot force enable HPET\n");
107 return;
108 }
109
110 /* use bits 31:14, 16 kB aligned */
111 rcba_base = ioremap_nocache(rcba, 0x4000);
112 if (rcba_base == NULL) {
113 printk(KERN_DEBUG "ioremap failed. Cannot force enable HPET\n");
114 return;
115 }
116
117 /* read the Function Disable register, dword mode only */
118 val = readl(rcba_base + 0x3404);
119
120 if (val & 0x80) {
121 /* HPET is enabled in HPTC. Just not reported by BIOS */
122 val = val & 0x3;
123 force_hpet_address = 0xFED00000 | (val << 12);
124 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
125 force_hpet_address);
126 iounmap(rcba_base);
127 return;
128 }
129
130 /* HPET disabled in HPTC. Trying to enable */
131 writel(val | 0x80, rcba_base + 0x3404);
132
133 val = readl(rcba_base + 0x3404);
134 if (!(val & 0x80)) {
135 err = 1;
136 } else {
137 val = val & 0x3;
138 force_hpet_address = 0xFED00000 | (val << 12);
139 }
140
141 if (err) {
142 force_hpet_address = 0;
143 iounmap(rcba_base);
144 printk(KERN_DEBUG "Failed to force enable HPET\n");
145 } else {
bfe0c1cc 146 force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
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VP
147 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
148 force_hpet_address);
149 }
150}
151
152DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
76492237 153 ich_force_enable_hpet);
d54bd57d 154DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
76492237 155 ich_force_enable_hpet);
ed6fb174 156DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
76492237 157 ich_force_enable_hpet);
d54bd57d 158DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
76492237 159 ich_force_enable_hpet);
d54bd57d 160DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
76492237 161 ich_force_enable_hpet);
d54bd57d 162DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
76492237 163 ich_force_enable_hpet);
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164
165
166static struct pci_dev *cached_dev;
167
168static void old_ich_force_hpet_resume(void)
169{
170 u32 val;
171 u32 uninitialized_var(gen_cntl);
172
173 if (!force_hpet_address || !cached_dev)
174 return;
175
176 pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
177 gen_cntl &= (~(0x7 << 15));
178 gen_cntl |= (0x4 << 15);
179
180 pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
181 pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
182 val = gen_cntl >> 15;
183 val &= 0x7;
184 if (val == 0x4)
185 printk(KERN_DEBUG "Force enabled HPET at resume\n");
186 else
187 BUG();
188}
189
190static void old_ich_force_enable_hpet(struct pci_dev *dev)
191{
192 u32 val;
193 u32 uninitialized_var(gen_cntl);
194
195 if (hpet_address || force_hpet_address)
196 return;
197
198 pci_read_config_dword(dev, 0xD0, &gen_cntl);
199 /*
200 * Bit 17 is HPET enable bit.
201 * Bit 16:15 control the HPET base address.
202 */
203 val = gen_cntl >> 15;
204 val &= 0x7;
205 if (val & 0x4) {
206 val &= 0x3;
207 force_hpet_address = 0xFED00000 | (val << 12);
208 printk(KERN_DEBUG "HPET at base address 0x%lx\n",
209 force_hpet_address);
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210 return;
211 }
212
213 /*
214 * HPET is disabled. Trying enabling at FED00000 and check
215 * whether it sticks
216 */
217 gen_cntl &= (~(0x7 << 15));
218 gen_cntl |= (0x4 << 15);
219 pci_write_config_dword(dev, 0xD0, gen_cntl);
220
221 pci_read_config_dword(dev, 0xD0, &gen_cntl);
222
223 val = gen_cntl >> 15;
224 val &= 0x7;
225 if (val & 0x4) {
226 /* HPET is enabled in HPTC. Just not reported by BIOS */
227 val &= 0x3;
228 force_hpet_address = 0xFED00000 | (val << 12);
229 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
230 force_hpet_address);
32a2da64 231 cached_dev = dev;
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VP
232 force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
233 return;
234 }
235
236 printk(KERN_DEBUG "Failed to force enable HPET\n");
237}
238
239DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
76492237 240 old_ich_force_enable_hpet);
bfe0c1cc 241DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
76492237 242 old_ich_force_enable_hpet);
bfe0c1cc 243
b196884e
US
244
245static void vt8237_force_hpet_resume(void)
246{
247 u32 val;
248
249 if (!force_hpet_address || !cached_dev)
250 return;
251
252 val = 0xfed00000 | 0x80;
253 pci_write_config_dword(cached_dev, 0x68, val);
254
255 pci_read_config_dword(cached_dev, 0x68, &val);
256 if (val & 0x80)
257 printk(KERN_DEBUG "Force enabled HPET at resume\n");
258 else
259 BUG();
260}
261
262static void vt8237_force_enable_hpet(struct pci_dev *dev)
263{
264 u32 uninitialized_var(val);
265
266 if (!hpet_force_user || hpet_address || force_hpet_address)
267 return;
268
269 pci_read_config_dword(dev, 0x68, &val);
270 /*
271 * Bit 7 is HPET enable bit.
272 * Bit 31:10 is HPET base address (contrary to what datasheet claims)
273 */
274 if (val & 0x80) {
275 force_hpet_address = (val & ~0x3ff);
276 printk(KERN_DEBUG "HPET at base address 0x%lx\n",
277 force_hpet_address);
278 return;
279 }
280
281 /*
282 * HPET is disabled. Trying enabling at FED00000 and check
283 * whether it sticks
284 */
285 val = 0xfed00000 | 0x80;
286 pci_write_config_dword(dev, 0x68, val);
287
288 pci_read_config_dword(dev, 0x68, &val);
289 if (val & 0x80) {
290 force_hpet_address = (val & ~0x3ff);
291 printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
292 force_hpet_address);
293 cached_dev = dev;
294 force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
295 return;
296 }
297
298 printk(KERN_DEBUG "Failed to force enable HPET\n");
299}
300
301DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
302 vt8237_force_enable_hpet);
303DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
304 vt8237_force_enable_hpet);
305
306
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VP
307void force_hpet_resume(void)
308{
309 switch (force_hpet_resume_type) {
310 case ICH_FORCE_HPET_RESUME:
311 return ich_force_hpet_resume();
312
313 case OLD_ICH_FORCE_HPET_RESUME:
314 return old_ich_force_hpet_resume();
315
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US
316 case VT8237_FORCE_HPET_RESUME:
317 return vt8237_force_hpet_resume();
318
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VP
319 default:
320 break;
321 }
322}
323
d54bd57d 324#endif
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