// SPDX-License-Identifier: GPL-2.0
/* Various workarounds for chipset bugs.
This code runs very early and can ' t use the regular PCI subsystem
The entries are keyed to PCI bridges which usually identify chipsets
uniquely .
This is only for whole classes of chipsets with specific problems which
need early invasive action ( e . g . before the timers are initialized ) .
Most PCI device specific workarounds can be done later and should be
in standard PCI quirks
Mainboard specific bugs should be handled by DMI entries .
CPU specific bugs in setup.c */
#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/pci_ids.h>
#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_regs.h>
#include <linux/platform_data/x86/apple.h>
#include <drm/intel/i915_drm.h>
#include <drm/intel/pciids.h>
#include <asm /pci-direct.h>
#include <asm /dma.h>
#include <asm /io_apic.h>
#include <asm /apic.h>
#include <asm /hpet.h>
#include <asm /iommu.h>
#include <asm /gart.h>
#include <asm /irq_remapping.h>
#include <asm /early_ioremap.h>
static void __init fix_hypertransport_config(int num, int slot, int func)
{
u32 htcfg;
/*
* we found a hypertransport bus
* make sure that we are broadcasting
* interrupts to all cpus on the ht bus
* if we ' re using extended apic ids
*/
htcfg = read_pci_config(num, slot, func, 0 x68);
if (htcfg & (1 << 18 )) {
printk(KERN_INFO "Detected use of extended apic ids "
"on hypertransport bus\n" );
if ((htcfg & (1 << 17 )) == 0 ) {
printk(KERN_INFO "Enabling hypertransport extended "
"apic interrupt broadcast\n" );
printk(KERN_INFO "Note this is a bios bug, "
"please contact your hw vendor\n" );
htcfg |= (1 << 17 );
write_pci_config(num, slot, func, 0 x68, htcfg);
}
}
}
static void __init via_bugs(int num, int slot, int func)
{
#ifdef CONFIG_GART_IOMMU
if ((max_pfn > MAX_DMA32_PFN || force_iommu) &&
!gart_iommu_aperture_allowed) {
printk(KERN_INFO
"Looks like a VIA chipset. Disabling IOMMU."
" Override with iommu=allowed\n" );
gart_iommu_aperture_disabled = 1 ;
}
#endif
}
#ifdef CONFIG_ACPI
#ifdef CONFIG_X86_IO_APIC
static int __init nvidia_hpet_check(struct acpi_table_header *header)
{
return 0 ;
}
#endif /* CONFIG_X86_IO_APIC */
#endif /* CONFIG_ACPI */
static void __init nvidia_bugs(int num, int slot, int func)
{
#ifdef CONFIG_ACPI
#ifdef CONFIG_X86_IO_APIC
/*
* Only applies to Nvidia root ports ( bus 0 ) and not to
* Nvidia graphics cards with PCI ports on secondary buses .
*/
if (num)
return ;
/*
* All timer overrides on Nvidia are
* wrong unless HPET is enabled .
* Unfortunately that ' s not true on many Asus boards .
* We don ' t know yet how to detect this automatically , but
* at least allow a command line override .
*/
if (acpi_use_timer_override)
return ;
if (acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check)) {
acpi_skip_timer_override = 1 ;
printk(KERN_INFO "Nvidia board "
"detected. Ignoring ACPI "
"timer override.\n" );
printk(KERN_INFO "If you got timer trouble "
"try acpi_use_timer_override\n" );
}
#endif
#endif
/* RED-PEN skip them on mptables too? */
}
#if defined (CONFIG_ACPI) && defined (CONFIG_X86_IO_APIC)
static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
{
u32 d;
u8 b;
b = read_pci_config_byte(num, slot, func, 0 xac);
b &= ~(1 <<5 );
write_pci_config_byte(num, slot, func, 0 xac, b);
d = read_pci_config(num, slot, func, 0 x70);
d |= 1 <<8 ;
write_pci_config(num, slot, func, 0 x70, d);
d = read_pci_config(num, slot, func, 0 x8);
d &= 0 xff;
return d;
}
static void __init ati_bugs(int num, int slot, int func)
{
u32 d;
u8 b;
if (acpi_use_timer_override)
return ;
d = ati_ixp4x0_rev(num, slot, func);
if (d < 0 x82)
acpi_skip_timer_override = 1 ;
else {
/* check for IRQ0 interrupt swap */
outb(0 x72, 0 xcd6); b = inb(0 xcd7);
if (!(b & 0 x2))
acpi_skip_timer_override = 1 ;
}
if (acpi_skip_timer_override) {
printk(KERN_INFO "SB4X0 revision 0x%x\n" , d);
printk(KERN_INFO "Ignoring ACPI timer override.\n" );
printk(KERN_INFO "If you got timer trouble "
"try acpi_use_timer_override\n" );
}
}
static u32 __init ati_sbx00_rev(int num, int slot, int func)
{
u32 d;
d = read_pci_config(num, slot, func, 0 x8);
d &= 0 xff;
return d;
}
static void __init ati_bugs_contd(int num, int slot, int func)
{
u32 d, rev;
rev = ati_sbx00_rev(num, slot, func);
if (rev >= 0 x40)
acpi_fix_pin2_polarity = 1 ;
/*
* SB600 : revisions 0 x11 , 0 x12 , 0 x13 , 0 x14 , . . .
* SB700 : revisions 0 x39 , 0 x3a , . . .
* SB800 : revisions 0 x40 , 0 x41 , . . .
*/
if (rev >= 0 x39)
return ;
if (acpi_use_timer_override)
return ;
/* check for IRQ0 interrupt swap */
d = read_pci_config(num, slot, func, 0 x64);
if (!(d & (1 <<14 )))
acpi_skip_timer_override = 1 ;
if (acpi_skip_timer_override) {
printk(KERN_INFO "SB600 revision 0x%x\n" , rev);
printk(KERN_INFO "Ignoring ACPI timer override.\n" );
printk(KERN_INFO "If you got timer trouble "
"try acpi_use_timer_override\n" );
}
}
#else
static void __init ati_bugs(int num, int slot, int func)
{
}
static void __init ati_bugs_contd(int num, int slot, int func)
{
}
#endif
static void __init intel_remapping_check(int num, int slot, int func)
{
u8 revision;
u16 device;
device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);
revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID);
/*
* Revision < = 13 of all triggering devices id in this quirk
* have a problem draining interrupts when irq remapping is
* enabled , and should be flagged as broken . Additionally
* revision 0 x22 of device id 0 x3405 has this problem .
*/
if (revision <= 0 x13)
set_irq_remapping_broken();
else if (device == 0 x3405 && revision == 0 x22)
set_irq_remapping_broken();
}
/*
* Systems with Intel graphics controllers set aside memory exclusively
* for gfx driver use . This memory is not marked in the E820 as reserved
* or as RAM , and so is subject to overlap from E820 manipulation later
* in the boot process . On some systems , MMIO space is allocated on top ,
* despite the efforts of the " RAM buffer " approach , which simply rounds
* memory boundaries up to 64 M to try to catch space that may decode
* as RAM and so is not suitable for MMIO .
*/
#define KB(x) ((x) * 1024 UL)
#define MB(x) (KB (KB (x)))
static resource_size_t __init i830_tseg_size(void )
{
u8 esmramc = read_pci_config_byte(0 , 0 , 0 , I830_ESMRAMC);
if (!(esmramc & TSEG_ENABLE))
return 0 ;
if (esmramc & I830_TSEG_SIZE_1M)
return MB(1 );
else
return KB(512 );
}
static resource_size_t __init i845_tseg_size(void )
{
u8 esmramc = read_pci_config_byte(0 , 0 , 0 , I845_ESMRAMC);
u8 tseg_size = esmramc & I845_TSEG_SIZE_MASK;
if (!(esmramc & TSEG_ENABLE))
return 0 ;
switch (tseg_size) {
case I845_TSEG_SIZE_512K: return KB(512 );
case I845_TSEG_SIZE_1M: return MB(1 );
default :
WARN(1 , "Unknown ESMRAMC value: %x!\n" , esmramc);
}
return 0 ;
}
static resource_size_t __init i85x_tseg_size(void )
{
u8 esmramc = read_pci_config_byte(0 , 0 , 0 , I85X_ESMRAMC);
if (!(esmramc & TSEG_ENABLE))
return 0 ;
return MB(1 );
}
static resource_size_t __init i830_mem_size(void )
{
return read_pci_config_byte(0 , 0 , 0 , I830_DRB3) * MB(32 );
}
static resource_size_t __init i85x_mem_size(void )
{
return read_pci_config_byte(0 , 0 , 1 , I85X_DRB3) * MB(32 );
}
/*
* On 830 / 845 / 85 x the stolen memory base isn ' t available in any
* register . We need to calculate it as TOM - TSEG_SIZE - stolen_size .
*/
static resource_size_t __init i830_stolen_base(int num, int slot, int func,
resource_size_t stolen_size)
{
return i830_mem_size() - i830_tseg_size() - stolen_size;
}
static resource_size_t __init i845_stolen_base(int num, int slot, int func,
resource_size_t stolen_size)
{
return i830_mem_size() - i845_tseg_size() - stolen_size;
}
static resource_size_t __init i85x_stolen_base(int num, int slot, int func,
resource_size_t stolen_size)
{
return i85x_mem_size() - i85x_tseg_size() - stolen_size;
}
static resource_size_t __init i865_stolen_base(int num, int slot, int func,
resource_size_t stolen_size)
{
u16 toud = 0 ;
toud = read_pci_config_16(0 , 0 , 0 , I865_TOUD);
return toud * KB(64 ) + i845_tseg_size();
}
static resource_size_t __init gen3_stolen_base(int num, int slot, int func,
resource_size_t stolen_size)
{
u32 bsm;
/* Almost universally we can find the Graphics Base of Stolen Memory
* at register BSM ( 0 x5c ) in the igfx configuration space . On a few
* ( desktop ) machines this is also mirrored in the bridge device at
* different locations , or in the MCHBAR .
*/
bsm = read_pci_config(num, slot, func, INTEL_BSM);
return bsm & INTEL_BSM_MASK;
}
static resource_size_t __init gen11_stolen_base(int num, int slot, int func,
resource_size_t stolen_size)
{
u64 bsm;
bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0);
bsm &= INTEL_BSM_MASK;
bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32 ;
return bsm;
}
static resource_size_t __init i830_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
u16 gms;
gmch_ctrl = read_pci_config_16(0 , 0 , 0 , I830_GMCH_CTRL);
gms = gmch_ctrl & I830_GMCH_GMS_MASK;
switch (gms) {
case I830_GMCH_GMS_STOLEN_512: return KB(512 );
case I830_GMCH_GMS_STOLEN_1024: return MB(1 );
case I830_GMCH_GMS_STOLEN_8192: return MB(8 );
/* local memory isn't part of the normal address space */
case I830_GMCH_GMS_LOCAL: return 0 ;
default :
WARN(1 , "Unknown GMCH_CTRL value: %x!\n" , gmch_ctrl);
}
return 0 ;
}
static resource_size_t __init gen3_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
u16 gms;
gmch_ctrl = read_pci_config_16(0 , 0 , 0 , I830_GMCH_CTRL);
gms = gmch_ctrl & I855_GMCH_GMS_MASK;
switch (gms) {
case I855_GMCH_GMS_STOLEN_1M: return MB(1 );
case I855_GMCH_GMS_STOLEN_4M: return MB(4 );
case I855_GMCH_GMS_STOLEN_8M: return MB(8 );
case I855_GMCH_GMS_STOLEN_16M: return MB(16 );
case I855_GMCH_GMS_STOLEN_32M: return MB(32 );
case I915_GMCH_GMS_STOLEN_48M: return MB(48 );
case I915_GMCH_GMS_STOLEN_64M: return MB(64 );
case G33_GMCH_GMS_STOLEN_128M: return MB(128 );
case G33_GMCH_GMS_STOLEN_256M: return MB(256 );
case INTEL_GMCH_GMS_STOLEN_96M: return MB(96 );
case INTEL_GMCH_GMS_STOLEN_160M:return MB(160 );
case INTEL_GMCH_GMS_STOLEN_224M:return MB(224 );
case INTEL_GMCH_GMS_STOLEN_352M:return MB(352 );
default :
WARN(1 , "Unknown GMCH_CTRL value: %x!\n" , gmch_ctrl);
}
return 0 ;
}
static resource_size_t __init gen6_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
u16 gms;
gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK;
return gms * MB(32 );
}
static resource_size_t __init gen8_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
u16 gms;
gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK;
return gms * MB(32 );
}
static resource_size_t __init chv_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
u16 gms;
gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK;
/*
* 0 x0 to 0 x10 : 32 MB increments starting at 0 MB
* 0 x11 to 0 x16 : 4 MB increments starting at 8 MB
* 0 x17 to 0 x1d : 4 MB increments start at 36 MB
*/
if (gms < 0 x11)
return gms * MB(32 );
else if (gms < 0 x17)
return (gms - 0 x11) * MB(4 ) + MB(8 );
else
return (gms - 0 x17) * MB(4 ) + MB(36 );
}
static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
u16 gms;
gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK;
/* 0x0 to 0xef: 32MB increments starting at 0MB */
/* 0xf0 to 0xfe: 4MB increments starting at 4MB */
if (gms < 0 xf0)
return gms * MB(32 );
else
return (gms - 0 xf0) * MB(4 ) + MB(4 );
}
struct intel_early_ops {
resource_size_t (*stolen_size)(int num, int slot, int func);
resource_size_t (*stolen_base)(int num, int slot, int func,
resource_size_t size);
};
static const struct intel_early_ops i830_early_ops __initconst = {
.stolen_base = i830_stolen_base,
.stolen_size = i830_stolen_size,
};
static const struct intel_early_ops i845_early_ops __initconst = {
.stolen_base = i845_stolen_base,
.stolen_size = i830_stolen_size,
};
static const struct intel_early_ops i85x_early_ops __initconst = {
.stolen_base = i85x_stolen_base,
.stolen_size = gen3_stolen_size,
};
static const struct intel_early_ops i865_early_ops __initconst = {
.stolen_base = i865_stolen_base,
.stolen_size = gen3_stolen_size,
};
static const struct intel_early_ops gen3_early_ops __initconst = {
.stolen_base = gen3_stolen_base,
.stolen_size = gen3_stolen_size,
};
static const struct intel_early_ops gen6_early_ops __initconst = {
.stolen_base = gen3_stolen_base,
.stolen_size = gen6_stolen_size,
};
static const struct intel_early_ops gen8_early_ops __initconst = {
.stolen_base = gen3_stolen_base,
.stolen_size = gen8_stolen_size,
};
static const struct intel_early_ops gen9_early_ops __initconst = {
.stolen_base = gen3_stolen_base,
.stolen_size = gen9_stolen_size,
};
static const struct intel_early_ops chv_early_ops __initconst = {
.stolen_base = gen3_stolen_base,
.stolen_size = chv_stolen_size,
};
static const struct intel_early_ops gen11_early_ops __initconst = {
.stolen_base = gen11_stolen_base,
.stolen_size = gen9_stolen_size,
};
/* Intel integrated GPUs for which we need to reserve "stolen memory" */
static const struct pci_device_id intel_early_ids[] __initconst = {
INTEL_I830_IDS(INTEL_VGA_DEVICE, &i830_early_ops),
INTEL_I845G_IDS(INTEL_VGA_DEVICE, &i845_early_ops),
INTEL_I85X_IDS(INTEL_VGA_DEVICE, &i85x_early_ops),
INTEL_I865G_IDS(INTEL_VGA_DEVICE, &i865_early_ops),
INTEL_I915G_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_I915GM_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_I945G_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_I945GM_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_VLV_IDS(INTEL_VGA_DEVICE, &gen6_early_ops),
INTEL_PNV_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_I965G_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_G33_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_I965GM_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_GM45_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_G45_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_ILK_IDS(INTEL_VGA_DEVICE, &gen3_early_ops),
INTEL_SNB_IDS(INTEL_VGA_DEVICE, &gen6_early_ops),
INTEL_IVB_IDS(INTEL_VGA_DEVICE, &gen6_early_ops),
INTEL_HSW_IDS(INTEL_VGA_DEVICE, &gen6_early_ops),
INTEL_BDW_IDS(INTEL_VGA_DEVICE, &gen8_early_ops),
INTEL_CHV_IDS(INTEL_VGA_DEVICE, &chv_early_ops),
INTEL_SKL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_BXT_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_KBL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_CFL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_WHL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_CML_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_GLK_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_CNL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops),
INTEL_ICL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_EHL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_JSL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_TGL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_RKL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_ADLS_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_ADLP_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_ADLN_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_RPLS_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_RPLU_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
INTEL_RPLP_IDS(INTEL_VGA_DEVICE, &gen11_early_ops),
};
struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0 , 0 );
EXPORT_SYMBOL(intel_graphics_stolen_res);
static void __init
intel_graphics_stolen(int num, int slot, int func,
const struct intel_early_ops *early_ops)
{
resource_size_t base, size;
resource_size_t end;
size = early_ops->stolen_size(num, slot, func);
base = early_ops->stolen_base(num, slot, func, size);
if (!size || !base)
return ;
end = base + size - 1 ;
intel_graphics_stolen_res.start = base;
intel_graphics_stolen_res.end = end;
printk(KERN_INFO "Reserving Intel graphics memory at %pR\n" ,
&intel_graphics_stolen_res);
/* Mark this space as reserved */
e820__range_add(base, size, E820_TYPE_RESERVED);
e820__update_table(e820_table);
}
static void __init intel_graphics_quirks(int num, int slot, int func)
{
const struct intel_early_ops *early_ops;
u16 device;
int i;
/*
* Reserve " stolen memory " for an integrated GPU . If we ' ve already
* found one , there ' s nothing to do for other ( discrete ) GPUs .
*/
if (resource_size(&intel_graphics_stolen_res))
return ;
device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);
for (i = 0 ; i < ARRAY_SIZE(intel_early_ids); i++) {
kernel_ulong_t driver_data = intel_early_ids[i].driver_data;
if (intel_early_ids[i].device != device)
continue ;
early_ops = (typeof(early_ops))driver_data;
intel_graphics_stolen(num, slot, func, early_ops);
return ;
}
}
static void __init force_disable_hpet(int num, int slot, int func)
{
#ifdef CONFIG_HPET_TIMER
boot_hpet_disable = true ;
pr_info("x86/hpet: Will disable the HPET for this platform because it's not reliable\n" );
#endif
}
#define BCM4331_MMIO_SIZE 16384
#define BCM4331_PM_CAP 0 x40
#define bcma_aread32(reg) ioread32(mmio + 1 * BCMA_CORE_SIZE + reg)
#define bcma_awrite32(reg, val) iowrite32(val, mmio + 1 * BCMA_CORE_SIZE + reg)
static void __init apple_airport_reset(int bus, int slot, int func)
{
void __iomem *mmio;
u16 pmcsr;
u64 addr;
int i;
if (!x86_apple_machine)
return ;
/* Card may have been put into PCI_D3hot by grub quirk */
pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL);
if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) {
pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
write_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL, pmcsr);
mdelay(10 );
pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL);
if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) {
pr_err("pci 0000:%02x:%02x.%d: Cannot power up Apple AirPort card\n" ,
bus, slot, func);
return ;
}
}
addr = read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_0);
addr |= (u64)read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_1) << 32 ;
addr &= PCI_BASE_ADDRESS_MEM_MASK;
mmio = early_ioremap(addr, BCM4331_MMIO_SIZE);
if (!mmio) {
pr_err("pci 0000:%02x:%02x.%d: Cannot iomap Apple AirPort card\n" ,
bus, slot, func);
return ;
}
pr_info("Resetting Apple AirPort card (left enabled by EFI)\n" );
for (i = 0 ; bcma_aread32(BCMA_RESET_ST) && i < 30 ; i++)
udelay(10 );
bcma_awrite32(BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
bcma_aread32(BCMA_RESET_CTL);
udelay(1 );
bcma_awrite32(BCMA_RESET_CTL, 0 );
bcma_aread32(BCMA_RESET_CTL);
udelay(10 );
early_iounmap(mmio, BCM4331_MMIO_SIZE);
}
#define QFLAG_APPLY_ONCE 0 x1
#define QFLAG_APPLIED 0 x2
#define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED)
struct chipset {
u32 vendor;
u32 device;
u32 class ;
u32 class_mask;
u32 flags;
void (*f)(int num, int slot, int func);
};
static struct chipset early_qrk[] __initdata = {
{ PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, nvidia_bugs },
{ PCI_VENDOR_ID_VIA, PCI_ANY_ID,
PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0 , fix_hypertransport_config },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0 , ati_bugs },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0 , ati_bugs_contd },
{ PCI_VENDOR_ID_INTEL, 0 x3403, PCI_CLASS_BRIDGE_HOST,
PCI_BASE_CLASS_BRIDGE, 0 , intel_remapping_check },
{ PCI_VENDOR_ID_INTEL, 0 x3405, PCI_CLASS_BRIDGE_HOST,
PCI_BASE_CLASS_BRIDGE, 0 , intel_remapping_check },
{ PCI_VENDOR_ID_INTEL, 0 x3406, PCI_CLASS_BRIDGE_HOST,
PCI_BASE_CLASS_BRIDGE, 0 , intel_remapping_check },
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, PCI_ANY_ID,
0 , intel_graphics_quirks },
/*
* HPET on the current version of the Baytrail platform has accuracy
* problems : it will halt in deep idle state - so we disable it .
*
* More details can be found in section 18 . 10 . 1 . 3 of the datasheet :
*
* http : //www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf
*/
{ PCI_VENDOR_ID_INTEL, 0 x0f00,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0 , force_disable_hpet},
{ PCI_VENDOR_ID_BROADCOM, 0 x4331,
PCI_CLASS_NETWORK_OTHER, PCI_ANY_ID, 0 , apple_airport_reset},
{}
};
static void __init early_pci_scan_bus(int bus);
/**
* check_dev_quirk - apply early quirks to a given PCI device
* @ num : bus number
* @ slot : slot number
* @ func : PCI function
*
* Check the vendor & device ID against the early quirks table .
*
* If the device is single function , let early_pci_scan_bus ( ) know so we don ' t
* poke at this device again .
*/
static int __init check_dev_quirk(int num, int slot, int func)
{
u16 class ;
u16 vendor;
u16 device;
u8 type;
u8 sec;
int i;
class = read_pci_config_16(num, slot, func, PCI_CLASS_DEVICE);
if (class == 0 xffff)
return -1 ; /* no class, treat as single function */
vendor = read_pci_config_16(num, slot, func, PCI_VENDOR_ID);
device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);
for (i = 0 ; early_qrk[i].f != NULL; i++) {
if (((early_qrk[i].vendor == PCI_ANY_ID) ||
(early_qrk[i].vendor == vendor)) &&
((early_qrk[i].device == PCI_ANY_ID) ||
(early_qrk[i].device == device)) &&
(!((early_qrk[i].class ^ class ) &
early_qrk[i].class_mask))) {
if ((early_qrk[i].flags &
QFLAG_DONE) != QFLAG_DONE)
early_qrk[i].f(num, slot, func);
early_qrk[i].flags |= QFLAG_APPLIED;
}
}
type = read_pci_config_byte(num, slot, func,
PCI_HEADER_TYPE);
if ((type & PCI_HEADER_TYPE_MASK) == PCI_HEADER_TYPE_BRIDGE) {
sec = read_pci_config_byte(num, slot, func, PCI_SECONDARY_BUS);
if (sec > num)
early_pci_scan_bus(sec);
}
if (!(type & PCI_HEADER_TYPE_MFD))
return -1 ;
return 0 ;
}
static void __init early_pci_scan_bus(int bus)
{
int slot, func;
/* Poor man's PCI discovery */
for (slot = 0 ; slot < 32 ; slot++)
for (func = 0 ; func < 8 ; func++) {
/* Only probe function 0 on single fn devices */
if (check_dev_quirk(bus, slot, func))
break ;
}
}
void __init early_quirks(void )
{
if (!early_pci_allowed())
return ;
early_pci_scan_bus(0 );
}
Messung V0.5 in Prozent C=97 H=96 G=96
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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