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authorDave Airlie <airlied@redhat.com>2016-07-26 17:26:29 +1000
committerDave Airlie <airlied@redhat.com>2016-07-26 17:26:29 +1000
commit5e580523d9128a4d8364fe89d36c38fc7819c8dd (patch)
tree852fb2427d980830ae8686a91e4ca5873f259ab9 /arch/x86/kernel/early-quirks.c
parentc11dea5b0290984fa48111957ba3fdc5b3bdae5a (diff)
parent523d939ef98fd712632d93a5a2b588e477a7565e (diff)
Backmerge tag 'v4.7' into drm-next
Linux 4.7 As requested by Daniel Vetter as the conflicts were getting messy.
Diffstat (limited to 'arch/x86/kernel/early-quirks.c')
-rw-r--r--arch/x86/kernel/early-quirks.c105
1 files changed, 92 insertions, 13 deletions
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 757390eb562b..de7501edb21c 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -11,7 +11,11 @@
#include <linux/pci.h>
#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/dmi.h>
#include <linux/pci_ids.h>
+#include <linux/bcma/bcma.h>
+#include <linux/bcma/bcma_regs.h>
#include <drm/i915_drm.h>
#include <asm/pci-direct.h>
#include <asm/dma.h>
@@ -21,6 +25,9 @@
#include <asm/iommu.h>
#include <asm/gart.h>
#include <asm/irq_remapping.h>
+#include <asm/early_ioremap.h>
+
+#define dev_err(msg) pr_err("pci 0000:%02x:%02x.%d: %s", bus, slot, func, msg)
static void __init fix_hypertransport_config(int num, int slot, int func)
{
@@ -76,6 +83,13 @@ 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.
@@ -574,6 +588,61 @@ static void __init force_disable_hpet(int num, int slot, int func)
#endif
}
+#define BCM4331_MMIO_SIZE 16384
+#define BCM4331_PM_CAP 0x40
+#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 (!dmi_match(DMI_SYS_VENDOR, "Apple Inc."))
+ 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) {
+ dev_err("Cannot power up Apple AirPort card\n");
+ 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) {
+ dev_err("Cannot iomap Apple AirPort card\n");
+ 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 0x1
#define QFLAG_APPLIED 0x2
@@ -587,12 +656,6 @@ struct chipset {
void (*f)(int num, int slot, int func);
};
-/*
- * Only works for devices on the root bus. If you add any devices
- * not on bus 0 readd another loop level in early_quirks(). But
- * be careful because at least the Nvidia quirk here relies on
- * only matching on bus 0.
- */
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 },
@@ -622,9 +685,13 @@ static struct chipset early_qrk[] __initdata = {
*/
{ PCI_VENDOR_ID_INTEL, 0x0f00,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet},
+ { PCI_VENDOR_ID_BROADCOM, 0x4331,
+ 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
@@ -633,7 +700,7 @@ static struct chipset early_qrk[] __initdata = {
*
* Check the vendor & device ID against the early quirks table.
*
- * If the device is single function, let early_quirks() know so we don't
+ * 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)
@@ -642,6 +709,7 @@ static int __init check_dev_quirk(int num, int slot, int func)
u16 vendor;
u16 device;
u8 type;
+ u8 sec;
int i;
class = read_pci_config_16(num, slot, func, PCI_CLASS_DEVICE);
@@ -669,25 +737,36 @@ static int __init check_dev_quirk(int num, int slot, int func)
type = read_pci_config_byte(num, slot, func,
PCI_HEADER_TYPE);
+
+ if ((type & 0x7f) == 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 & 0x80))
return -1;
return 0;
}
-void __init early_quirks(void)
+static void __init early_pci_scan_bus(int bus)
{
int slot, func;
- if (!early_pci_allowed())
- return;
-
/* Poor man's PCI discovery */
- /* Only scan the root bus */
for (slot = 0; slot < 32; slot++)
for (func = 0; func < 8; func++) {
/* Only probe function 0 on single fn devices */
- if (check_dev_quirk(0, slot, func))
+ if (check_dev_quirk(bus, slot, func))
break;
}
}
+
+void __init early_quirks(void)
+{
+ if (!early_pci_allowed())
+ return;
+
+ early_pci_scan_bus(0);
+}