diff options
| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2006-12-06 20:17:30 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2006-12-08 16:53:49 +0100 |
| commit | b7bdeae0e1679d8b70168d52d932092ae5ae0278 (patch) | |
| tree | c956c69239aef9aad848974ee794fb0e476aba68 | |
| parent | 4c2c7f77e630efe988ab02f71eb2da4015a86e97 (diff) | |
PCI: quirk to disable e100 interrupt if RESET failed to
Without this quirk, e100 can be pulling on a shared
interrupt line when another device (eg. USB) loads,
causing the interrupt to scream and get disabled.
http://bugzilla.kernel.org/show_bug.cgi?id=5918
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
| -rw-r--r-- | drivers/pci/quirks.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 89f5b4aede1a..6cfa3bbdd83d 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1293,6 +1293,63 @@ static void __devinit quirk_netmos(struct pci_dev *dev) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID, quirk_netmos); +static void __devinit quirk_e100_interrupt(struct pci_dev *dev) +{ + u16 command; + u32 bar; + u8 __iomem *csr; + u8 cmd_hi; + + switch (dev->device) { + /* PCI IDs taken from drivers/net/e100.c */ + case 0x1029: + case 0x1030 ... 0x1034: + case 0x1038 ... 0x103E: + case 0x1050 ... 0x1057: + case 0x1059: + case 0x1064 ... 0x106B: + case 0x1091 ... 0x1095: + case 0x1209: + case 0x1229: + case 0x2449: + case 0x2459: + case 0x245D: + case 0x27DC: + break; + default: + return; + } + + /* + * Some firmware hands off the e100 with interrupts enabled, + * which can cause a flood of interrupts if packets are + * received before the driver attaches to the device. So + * disable all e100 interrupts here. The driver will + * re-enable them when it's ready. + */ + pci_read_config_word(dev, PCI_COMMAND, &command); + pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar); + + if (!(command & PCI_COMMAND_MEMORY) || !bar) + return; + + csr = ioremap(bar, 8); + if (!csr) { + printk(KERN_WARNING "PCI: Can't map %s e100 registers\n", + pci_name(dev)); + return; + } + + cmd_hi = readb(csr + 3); + if (cmd_hi == 0) { + printk(KERN_WARNING "PCI: Firmware left %s e100 interrupts " + "enabled, disabling\n", pci_name(dev)); + writeb(1, csr + 3); + } + + iounmap(csr); +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, quirk_e100_interrupt); static void __devinit fixup_rev1_53c810(struct pci_dev* dev) { |