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         BUG_ON(rcba_base == NULL);
  78
  79         /* read the Function Disable register, dword mode only */
  80         val = readl(rcba_base + 0x3404);
  81         if (!(val & 0x80)) {
  82                 /* HPET disabled in HPTC. Trying to enable */
  83                 writel(val | 0x80, rcba_base + 0x3404);
  84         }
  85
  86         val = readl(rcba_base + 0x3404);
  87         if (!(val & 0x80))
  88                 BUG();
  89         else
  90                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
  91
  92         return;
  93 }
  94
  95 static void ich_force_enable_hpet(struct pci_dev *dev)
  96 {
  97         u32 val;
  98         u32 uninitialized_var(rcba);
  99         int err = 0;
 100
 101         if (hpet_address || force_hpet_address)
 102                 return;
 103
 104         pci_read_config_dword(dev, 0xF0, &rcba);
 105         rcba &= 0xFFFFC000;
 106         if (rcba == 0) {
 107                 dev_printk(KERN_DEBUG, &dev->dev, "RCBA disabled; "
 108                         "cannot force enable HPET\n");
 109                 return;
 110         }
 111
 112         /* use bits 31:14, 16 kB aligned */
 113         rcba_base = ioremap_nocache(rcba, 0x4000);
 114         if (rcba_base == NULL) {
 115                 dev_printk(KERN_DEBUG, &dev->dev, "ioremap failed; "
 116                         "cannot force enable HPET\n");
 117                 return;
 118         }
 119
 120         /* read the Function Disable register, dword mode only */
 121         val = readl(rcba_base + 0x3404);
 122
 123         if (val & 0x80) {
 124                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 125                 val = val & 0x3;
 126                 force_hpet_address = 0xFED00000 | (val << 12);
 127                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 128                         "0x%lx\n", force_hpet_address);
 129                 iounmap(rcba_base);
 130                 return;
 131         }
 132
 133         /* HPET disabled in HPTC. Trying to enable */
 134         writel(val | 0x80, rcba_base + 0x3404);
 135
 136         val = readl(rcba_base + 0x3404);
 137         if (!(val & 0x80)) {
 138                 err = 1;
 139         } else {
 140                 val = val & 0x3;
 141                 force_hpet_address = 0xFED00000 | (val << 12);
 142         }
 143
 144         if (err) {
 145                 force_hpet_address = 0;
 146                 iounmap(rcba_base);
 147                 dev_printk(KERN_DEBUG, &dev->dev,
 148                         "Failed to force enable HPET\n");
 149         } else {
 150                 force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
 151                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 152                         "0x%lx\n", force_hpet_address);
 153         }
 154 }
 155
 156 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
 157                          ich_force_enable_hpet);
 158 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0,
 159                          ich_force_enable_hpet);
 160 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
 161                          ich_force_enable_hpet);
 162 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
 163                          ich_force_enable_hpet);
 164 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
 165                          ich_force_enable_hpet);
 166 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
 167                          ich_force_enable_hpet);
 168 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
 169                          ich_force_enable_hpet);
 170 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_4,
 171                          ich_force_enable_hpet);
 172 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
 173                          ich_force_enable_hpet);
 174 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x3a16,   /* ICH10 */
 175                          ich_force_enable_hpet);
 176
 177 static struct pci_dev *cached_dev;
 178
 179 static void hpet_print_force_info(void)
 180 {
 181         printk(KERN_INFO "HPET not enabled in BIOS. "
 182                "You might try hpet=force boot option\n");
 183 }
 184
 185 static void old_ich_force_hpet_resume(void)
 186 {
 187         u32 val;
 188         u32 uninitialized_var(gen_cntl);
 189
 190         if (!force_hpet_address || !cached_dev)
 191                 return;
 192
 193         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 194         gen_cntl &= (~(0x7 << 15));
 195         gen_cntl |= (0x4 << 15);
 196
 197         pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
 198         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 199         val = gen_cntl >> 15;
 200         val &= 0x7;
 201         if (val == 0x4)
 202                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 203         else
 204                 BUG();
 205 }
 206
 207 static void old_ich_force_enable_hpet(struct pci_dev *dev)
 208 {
 209         u32 val;
 210         u32 uninitialized_var(gen_cntl);
 211
 212         if (hpet_address || force_hpet_address)
 213                 return;
 214
 215         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 216         /*
 217          * Bit 17 is HPET enable bit.
 218          * Bit 16:15 control the HPET base address.
 219          */
 220         val = gen_cntl >> 15;
 221         val &= 0x7;
 222         if (val & 0x4) {
 223                 val &= 0x3;
 224                 force_hpet_address = 0xFED00000 | (val << 12);
 225                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 226                         force_hpet_address);
 227                 return;
 228         }
 229
 230         /*
 231          * HPET is disabled. Trying enabling at FED00000 and check
 232          * whether it sticks
 233          */
 234         gen_cntl &= (~(0x7 << 15));
 235         gen_cntl |= (0x4 << 15);
 236         pci_write_config_dword(dev, 0xD0, gen_cntl);
 237
 238         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 239
 240         val = gen_cntl >> 15;
 241         val &= 0x7;
 242         if (val & 0x4) {
 243                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 244                 val &= 0x3;
 245                 force_hpet_address = 0xFED00000 | (val << 12);
 246                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 247                         "0x%lx\n", force_hpet_address);
 248                 cached_dev = dev;
 249                 force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
 250                 return;
 251         }
 252
 253         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 254 }
 255
 256 /*
 257  * Undocumented chipset features. Make sure that the user enforced
 258  * this.
 259  */
 260 static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
 261 {
 262         if (hpet_force_user)
 263                 old_ich_force_enable_hpet(dev);
 264         else
 265                 hpet_print_force_info();
 266 }
 267
 268 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
 269                          old_ich_force_enable_hpet_user);
 270 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
 271                          old_ich_force_enable_hpet_user);
 272 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
 273                          old_ich_force_enable_hpet_user);
 274 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
 275                          old_ich_force_enable_hpet_user);
 276 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
 277                          old_ich_force_enable_hpet_user);
 278 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
 279                          old_ich_force_enable_hpet);
 280 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
 281                          old_ich_force_enable_hpet);
 282
 283
 284 static void vt8237_force_hpet_resume(void)
 285 {
 286         u32 val;
 287
 288         if (!force_hpet_address || !cached_dev)
 289                 return;
 290
 291         val = 0xfed00000 | 0x80;
 292         pci_write_config_dword(cached_dev, 0x68, val);
 293
 294         pci_read_config_dword(cached_dev, 0x68, &val);
 295         if (val & 0x80)
 296                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 297         else
 298                 BUG();
 299 }
 300
 301 static void vt8237_force_enable_hpet(struct pci_dev *dev)
 302 {
 303         u32 uninitialized_var(val);
 304
 305         if (hpet_address || force_hpet_address)
 306                 return;
 307
 308         if (!hpet_force_user) {
 309                 hpet_print_force_info();
 310                 return;
 311         }
 312
 313         pci_read_config_dword(dev, 0x68, &val);
 314         /*
 315          * Bit 7 is HPET enable bit.
 316          * Bit 31:10 is HPET base address (contrary to what datasheet claims)
 317          */
 318         if (val & 0x80) {
 319                 force_hpet_address = (val & ~0x3ff);
 320                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 321                         force_hpet_address);
 322                 return;
 323         }
 324
 325         /*
 326          * HPET is disabled. Trying enabling at FED00000 and check
 327          * whether it sticks
 328          */
 329         val = 0xfed00000 | 0x80;
 330         pci_write_config_dword(dev, 0x68, val);
 331
 332         pci_read_config_dword(dev, 0x68, &val);
 333         if (val & 0x80) {
 334                 force_hpet_address = (val & ~0x3ff);
 335                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 336                         "0x%lx\n", force_hpet_address);
 337                 cached_dev = dev;
 338                 force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
 339                 return;
 340         }
 341
 342         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 343 }
 344
 345 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
 346                          vt8237_force_enable_hpet);
 347 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
 348                          vt8237_force_enable_hpet);
 349
 350 static void ati_force_hpet_resume(void)
 351 {
 352         pci_write_config_dword(cached_dev, 0x14, 0xfed00000);
 353         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 354 }
 355
 356 static u32 ati_ixp4x0_rev(struct pci_dev *dev)
 357 {
 358         u32 d;
 359         u8  b;
 360
 361         pci_read_config_byte(dev, 0xac, &b);
 362         b &= ~(1<<5);
 363         pci_write_config_byte(dev, 0xac, b);
 364         pci_read_config_dword(dev, 0x70, &d);
 365         d |= 1<<8;
 366         pci_write_config_dword(dev, 0x70, d);
 367         pci_read_config_dword(dev, 0x8, &d);
 368         d &= 0xff;
 369         dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
 370         return d;
 371 }
 372
 373 static void ati_force_enable_hpet(struct pci_dev *dev)
 374 {
 375         u32 d, val;
 376         u8  b;
 377
 378         if (hpet_address || force_hpet_address)
 379                 return;
 380
 381         if (!hpet_force_user) {
 382                 hpet_print_force_info();
 383                 return;
 384         }
 385
 386         d = ati_ixp4x0_rev(dev);
 387         if (d  < 0x82)
 388                 return;
 389
 390         /* base address */
 391         pci_write_config_dword(dev, 0x14, 0xfed00000);
 392         pci_read_config_dword(dev, 0x14, &val);
 393
 394         /* enable interrupt */
 395         outb(0x72, 0xcd6); b = inb(0xcd7);
 396         b |= 0x1;
 397         outb(0x72, 0xcd6); outb(b, 0xcd7);
 398         outb(0x72, 0xcd6); b = inb(0xcd7);
 399         if (!(b & 0x1))
 400                 return;
 401         pci_read_config_dword(dev, 0x64, &d);
 402         d |= (1<<10);
 403         pci_write_config_dword(dev, 0x64, d);
 404         pci_read_config_dword(dev, 0x64, &d);
 405         if (!(d & (1<<10)))
 406                 return;
 407
 408         force_hpet_address = val;
 409         force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
 410         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 411                    force_hpet_address);
 412         cached_dev = dev;
 413 }
 414 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
 415                          ati_force_enable_hpet);
 416
 417 /*
 418  * Undocumented chipset feature taken from LinuxBIOS.
 419  */
 420 static void nvidia_force_hpet_resume(void)
 421 {
 422         pci_write_config_dword(cached_dev, 0x44, 0xfed00001);
 423         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 424 }
 425
 426 static void nvidia_force_enable_hpet(struct pci_dev *dev)
 427 {
 428         u32 uninitialized_var(val);
 429
 430         if (hpet_address || force_hpet_address)
 431                 return;
 432
 433         if (!hpet_force_user) {
 434                 hpet_print_force_info();
 435                 return;
 436         }
 437
 438         pci_write_config_dword(dev, 0x44, 0xfed00001);
 439         pci_read_config_dword(dev, 0x44, &val);
 440         force_hpet_address = val & 0xfffffffe;
 441         force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
 442         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 443                 force_hpet_address);
 444         cached_dev = dev;
 445         return;
 446 }
 447
 448 /* ISA Bridges */
 449 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0050,
 450                         nvidia_force_enable_hpet);
 451 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0051,
 452                         nvidia_force_enable_hpet);
 453
 454 /* LPC bridges */
 455 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0260,
 456                         nvidia_force_enable_hpet);
 457 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
 458                         nvidia_force_enable_hpet);
 459 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
 460                         nvidia_force_enable_hpet);
 461 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0362,
 462                         nvidia_force_enable_hpet);
 463 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0363,
 464                         nvidia_force_enable_hpet);
 465 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0364,
 466                         nvidia_force_enable_hpet);
 467 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0365,
 468                         nvidia_force_enable_hpet);
 469 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0366,
 470                         nvidia_force_enable_hpet);
 471 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0367,
 472                         nvidia_force_enable_hpet);
 473
 474 void force_hpet_resume(void)
 475 {
 476         switch (force_hpet_resume_type) {
 477         case ICH_FORCE_HPET_RESUME:
 478                 ich_force_hpet_resume();
 479                 return;
 480         case OLD_ICH_FORCE_HPET_RESUME:
 481                 old_ich_force_hpet_resume();
 482                 return;
 483         case VT8237_FORCE_HPET_RESUME:
 484                 vt8237_force_hpet_resume();
 485                 return;
 486         case NVIDIA_FORCE_HPET_RESUME:
 487                 nvidia_force_hpet_resume();
 488                 return;
 489         case ATI_FORCE_HPET_RESUME:
 490                 ati_force_hpet_resume();
 491                 return;
 492         default:
 493                 break;
 494         }
 495 }
 496
 497 #endif