arch/x86/kernel/quirks.c

   1 /*
   2  * This file contains work-arounds for x86 and x86_64 platform bugs.
   3  */
   4 #include <linux/pci.h>
   5 #include <linux/irq.h>
   6
   7 #include <asm/hpet.h>
   8
   9 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
  10
  11 static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
  12 {
  13         u8 config, rev;
  14         u16 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          */
  21         pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
  22         if (rev > 0x9)
  23                 return;
  24
  25         /* enable access to config space*/
  26         pci_read_config_byte(dev, 0xf4, &config);
  27         pci_write_config_byte(dev, 0xf4, config|0x2);
  28
  29         /*
  30          * read xTPR register.  We may not have a pci_dev for device 8
  31          * because it might be hidden until the above write.
  32          */
  33         pci_bus_read_config_word(dev->bus, PCI_DEVFN(8, 0), 0x4c, &word);
  34
  35         if (!(word & (1 << 13))) {
  36                 dev_info(&dev->dev, "Intel E7520/7320/7525 detected; "
  37                         "disabling irq balancing and affinity\n");
  38                 noirqdebug_setup("");
  39 #ifdef CONFIG_PROC_FS
  40                 no_irq_affinity = 1;
  41 #endif
  42         }
  43
  44         /* put back the original value for config space*/
  45         if (!(config & 0x2))
  46                 pci_write_config_byte(dev, 0xf4, config);
  47 }
  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);
  54 #endif
  55
  56 #if defined(CONFIG_HPET_TIMER)
  57 unsigned long force_hpet_address;
  58
  59 static enum {
  60         NONE_FORCE_HPET_RESUME,
  61         OLD_ICH_FORCE_HPET_RESUME,
  62         ICH_FORCE_HPET_RESUME,
  63         VT8237_FORCE_HPET_RESUME,
  64         NVIDIA_FORCE_HPET_RESUME,
  65         ATI_FORCE_HPET_RESUME,
  66 } force_hpet_resume_type;
  67
  68 static void __iomem *rcba_base;
  69
  70 static void ich_force_hpet_resume(void)
  71 {
  72         u32 val;
  73
  74         if (!force_hpet_address)
  75                 return;
  76
  77         if (rcba_base == NULL)
  78                 BUG();
  79
  80         /* read the Function Disable register, dword mode only */
  81         val = readl(rcba_base + 0x3404);
  82         if (!(val & 0x80)) {
  83                 /* HPET disabled in HPTC. Trying to enable */
  84                 writel(val | 0x80, rcba_base + 0x3404);
  85         }
  86
  87         val = readl(rcba_base + 0x3404);
  88         if (!(val & 0x80))
  89                 BUG();
  90         else
  91                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
  92
  93         return;
  94 }
  95
  96 static void ich_force_enable_hpet(struct pci_dev *dev)
  97 {
  98         u32 val;
  99         u32 uninitialized_var(rcba);
 100         int err = 0;
 101
 102         if (hpet_address || force_hpet_address)
 103                 return;
 104
 105         pci_read_config_dword(dev, 0xF0, &rcba);
 106         rcba &= 0xFFFFC000;
 107         if (rcba == 0) {
 108                 dev_printk(KERN_DEBUG, &dev->dev, "RCBA disabled; "
 109                         "cannot force enable HPET\n");
 110                 return;
 111         }
 112
 113         /* use bits 31:14, 16 kB aligned */
 114         rcba_base = ioremap_nocache(rcba, 0x4000);
 115         if (rcba_base == NULL) {
 116                 dev_printk(KERN_DEBUG, &dev->dev, "ioremap failed; "
 117                         "cannot force enable HPET\n");
 118                 return;
 119         }
 120
 121         /* read the Function Disable register, dword mode only */
 122         val = readl(rcba_base + 0x3404);
 123
 124         if (val & 0x80) {
 125                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 126                 val = val & 0x3;
 127                 force_hpet_address = 0xFED00000 | (val << 12);
 128                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 129                         "0x%lx\n", force_hpet_address);
 130                 iounmap(rcba_base);
 131                 return;
 132         }
 133
 134         /* HPET disabled in HPTC. Trying to enable */
 135         writel(val | 0x80, rcba_base + 0x3404);
 136
 137         val = readl(rcba_base + 0x3404);
 138         if (!(val & 0x80)) {
 139                 err = 1;
 140         } else {
 141                 val = val & 0x3;
 142                 force_hpet_address = 0xFED00000 | (val << 12);
 143         }
 144
 145         if (err) {
 146                 force_hpet_address = 0;
 147                 iounmap(rcba_base);
 148                 dev_printk(KERN_DEBUG, &dev->dev,
 149                         "Failed to force enable HPET\n");
 150         } else {
 151                 force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
 152                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 153                         "0x%lx\n", force_hpet_address);
 154         }
 155 }
 156
 157 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
 158                          ich_force_enable_hpet);
 159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0,
 160                          ich_force_enable_hpet);
 161 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
 162                          ich_force_enable_hpet);
 163 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
 164                          ich_force_enable_hpet);
 165 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
 166                          ich_force_enable_hpet);
 167 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
 168                          ich_force_enable_hpet);
 169 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
 170                          ich_force_enable_hpet);
 171 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
 172                          ich_force_enable_hpet);
 173
 174
 175 static struct pci_dev *cached_dev;
 176
 177 static void hpet_print_force_info(void)
 178 {
 179         printk(KERN_INFO "HPET not enabled in BIOS. "
 180                "You might try hpet=force boot option\n");
 181 }
 182
 183 static void old_ich_force_hpet_resume(void)
 184 {
 185         u32 val;
 186         u32 uninitialized_var(gen_cntl);
 187
 188         if (!force_hpet_address || !cached_dev)
 189                 return;
 190
 191         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 192         gen_cntl &= (~(0x7 << 15));
 193         gen_cntl |= (0x4 << 15);
 194
 195         pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
 196         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 197         val = gen_cntl >> 15;
 198         val &= 0x7;
 199         if (val == 0x4)
 200                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 201         else
 202                 BUG();
 203 }
 204
 205 static void old_ich_force_enable_hpet(struct pci_dev *dev)
 206 {
 207         u32 val;
 208         u32 uninitialized_var(gen_cntl);
 209
 210         if (hpet_address || force_hpet_address)
 211                 return;
 212
 213         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 214         /*
 215          * Bit 17 is HPET enable bit.
 216          * Bit 16:15 control the HPET base address.
 217          */
 218         val = gen_cntl >> 15;
 219         val &= 0x7;
 220         if (val & 0x4) {
 221                 val &= 0x3;
 222                 force_hpet_address = 0xFED00000 | (val << 12);
 223                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 224                         force_hpet_address);
 225                 return;
 226         }
 227
 228         /*
 229          * HPET is disabled. Trying enabling at FED00000 and check
 230          * whether it sticks
 231          */
 232         gen_cntl &= (~(0x7 << 15));
 233         gen_cntl |= (0x4 << 15);
 234         pci_write_config_dword(dev, 0xD0, gen_cntl);
 235
 236         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 237
 238         val = gen_cntl >> 15;
 239         val &= 0x7;
 240         if (val & 0x4) {
 241                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 242                 val &= 0x3;
 243                 force_hpet_address = 0xFED00000 | (val << 12);
 244                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 245                         "0x%lx\n", force_hpet_address);
 246                 cached_dev = dev;
 247                 force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
 248                 return;
 249         }
 250
 251         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 252 }
 253
 254 /*
 255  * Undocumented chipset features. Make sure that the user enforced
 256  * this.
 257  */
 258 static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
 259 {
 260         if (hpet_force_user)
 261                 old_ich_force_enable_hpet(dev);
 262         else
 263                 hpet_print_force_info();
 264 }
 265
 266 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
 267                          old_ich_force_enable_hpet_user);
 268 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
 269                          old_ich_force_enable_hpet_user);
 270 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
 271                          old_ich_force_enable_hpet_user);
 272 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
 273                          old_ich_force_enable_hpet_user);
 274 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
 275                          old_ich_force_enable_hpet_user);
 276 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
 277                          old_ich_force_enable_hpet);
 278 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
 279                          old_ich_force_enable_hpet);
 280
 281
 282 static void vt8237_force_hpet_resume(void)
 283 {
 284         u32 val;
 285
 286         if (!force_hpet_address || !cached_dev)
 287                 return;
 288
 289         val = 0xfed00000 | 0x80;
 290         pci_write_config_dword(cached_dev, 0x68, val);
 291
 292         pci_read_config_dword(cached_dev, 0x68, &val);
 293         if (val & 0x80)
 294                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 295         else
 296                 BUG();
 297 }
 298
 299 static void vt8237_force_enable_hpet(struct pci_dev *dev)
 300 {
 301         u32 uninitialized_var(val);
 302
 303         if (hpet_address || force_hpet_address)
 304                 return;
 305
 306         if (!hpet_force_user) {
 307                 hpet_print_force_info();
 308                 return;
 309         }
 310
 311         pci_read_config_dword(dev, 0x68, &val);
 312         /*
 313          * Bit 7 is HPET enable bit.
 314          * Bit 31:10 is HPET base address (contrary to what datasheet claims)
 315          */
 316         if (val & 0x80) {
 317                 force_hpet_address = (val & ~0x3ff);
 318                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 319                         force_hpet_address);
 320                 return;
 321         }
 322
 323         /*
 324          * HPET is disabled. Trying enabling at FED00000 and check
 325          * whether it sticks
 326          */
 327         val = 0xfed00000 | 0x80;
 328         pci_write_config_dword(dev, 0x68, val);
 329
 330         pci_read_config_dword(dev, 0x68, &val);
 331         if (val & 0x80) {
 332                 force_hpet_address = (val & ~0x3ff);
 333                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 334                         "0x%lx\n", force_hpet_address);
 335                 cached_dev = dev;
 336                 force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
 337                 return;
 338         }
 339
 340         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 341 }
 342
 343 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
 344                          vt8237_force_enable_hpet);
 345 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
 346                          vt8237_force_enable_hpet);
 347
 348 static void ati_force_hpet_resume(void)
 349 {
 350         pci_write_config_dword(cached_dev, 0x14, 0xfed00000);
 351         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 352 }
 353
 354 static u32 ati_ixp4x0_rev(struct pci_dev *dev)
 355 {
 356         u32 d;
 357         u8  b;
 358
 359         pci_read_config_byte(dev, 0xac, &b);
 360         b &= ~(1<<5);
 361         pci_write_config_byte(dev, 0xac, b);
 362         pci_read_config_dword(dev, 0x70, &d);
 363         d |= 1<<8;
 364         pci_write_config_dword(dev, 0x70, d);
 365         pci_read_config_dword(dev, 0x8, &d);
 366         d &= 0xff;
 367         dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
 368         return d;
 369 }
 370
 371 static void ati_force_enable_hpet(struct pci_dev *dev)
 372 {
 373         u32 d, val;
 374         u8  b;
 375
 376         if (hpet_address || force_hpet_address)
 377                 return;
 378
 379         if (!hpet_force_user) {
 380                 hpet_print_force_info();
 381                 return;
 382         }
 383
 384         d = ati_ixp4x0_rev(dev);
 385         if (d  < 0x82)
 386                 return;
 387
 388         /* base address */
 389         pci_write_config_dword(dev, 0x14, 0xfed00000);
 390         pci_read_config_dword(dev, 0x14, &val);
 391
 392         /* enable interrupt */
 393         outb(0x72, 0xcd6); b = inb(0xcd7);
 394         b |= 0x1;
 395         outb(0x72, 0xcd6); outb(b, 0xcd7);
 396         outb(0x72, 0xcd6); b = inb(0xcd7);
 397         if (!(b & 0x1))
 398                 return;
 399         pci_read_config_dword(dev, 0x64, &d);
 400         d |= (1<<10);
 401         pci_write_config_dword(dev, 0x64, d);
 402         pci_read_config_dword(dev, 0x64, &d);
 403         if (!(d & (1<<10)))
 404                 return;
 405
 406         force_hpet_address = val;
 407         force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
 408         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 409                    force_hpet_address);
 410         cached_dev = dev;
 411 }
 412 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
 413                          ati_force_enable_hpet);
 414
 415 /*
 416  * Undocumented chipset feature taken from LinuxBIOS.
 417  */
 418 static void nvidia_force_hpet_resume(void)
 419 {
 420         pci_write_config_dword(cached_dev, 0x44, 0xfed00001);
 421         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 422 }
 423
 424 static void nvidia_force_enable_hpet(struct pci_dev *dev)
 425 {
 426         u32 uninitialized_var(val);
 427
 428         if (hpet_address || force_hpet_address)
 429                 return;
 430
 431         if (!hpet_force_user) {
 432                 hpet_print_force_info();
 433                 return;
 434         }
 435
 436         pci_write_config_dword(dev, 0x44, 0xfed00001);
 437         pci_read_config_dword(dev, 0x44, &val);
 438         force_hpet_address = val & 0xfffffffe;
 439         force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
 440         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 441                 force_hpet_address);
 442         cached_dev = dev;
 443         return;
 444 }
 445
 446 /* ISA Bridges */
 447 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0050,
 448                         nvidia_force_enable_hpet);
 449 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0051,
 450                         nvidia_force_enable_hpet);
 451
 452 /* LPC bridges */
 453 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0260,
 454                         nvidia_force_enable_hpet);
 455 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
 456                         nvidia_force_enable_hpet);
 457 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
 458                         nvidia_force_enable_hpet);
 459 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0362,
 460                         nvidia_force_enable_hpet);
 461 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0363,
 462                         nvidia_force_enable_hpet);
 463 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0364,
 464                         nvidia_force_enable_hpet);
 465 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0365,
 466                         nvidia_force_enable_hpet);
 467 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0366,
 468                         nvidia_force_enable_hpet);
 469 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0367,
 470                         nvidia_force_enable_hpet);
 471
 472 void force_hpet_resume(void)
 473 {
 474         switch (force_hpet_resume_type) {
 475         case ICH_FORCE_HPET_RESUME:
 476                 ich_force_hpet_resume();
 477                 return;
 478         case OLD_ICH_FORCE_HPET_RESUME:
 479                 old_ich_force_hpet_resume();
 480                 return;
 481         case VT8237_FORCE_HPET_RESUME:
 482                 vt8237_force_hpet_resume();
 483                 return;
 484         case NVIDIA_FORCE_HPET_RESUME:
 485                 nvidia_force_hpet_resume();
 486                 return;
 487         case ATI_FORCE_HPET_RESUME:
 488                 ati_force_hpet_resume();
 489                 return;
 490         default:
 491                 break;
 492         }
 493 }
 494
 495 #endif