diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 8 | ||||
| -rw-r--r-- | drivers/pci/quirks.c | 30 |
2 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 5dffcfefc3c7..61a56b100c62 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -633,6 +633,14 @@ running once the system is up. inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver Format: <irq> + combined_mode= [HW] control which driver uses IDE ports in combined + mode: legacy IDE driver, libata, or both + (in the libata case, libata.atapi_enabled=1 may be + useful as well). Note that using the ide or libata + options may affect your device naming (e.g. by + changing hdc to sdb). + Format: combined (default), ide, or libata + inttest= [IA64] io7= [HW] IO7 for Marvel based alpha systems diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 3a4f49f4effb..f28ebdd3958a 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1098,6 +1098,23 @@ static void __init quirk_alder_ioapic(struct pci_dev *pdev) DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic ); #endif +enum ide_combined_type { COMBINED = 0, IDE = 1, LIBATA = 2 }; +/* Defaults to combined */ +static enum ide_combined_type combined_mode; + +static int __init combined_setup(char *str) +{ + if (!strncmp(str, "ide", 3)) + combined_mode = IDE; + else if (!strncmp(str, "libata", 6)) + combined_mode = LIBATA; + else /* "combined" or anything else defaults to old behavior */ + combined_mode = COMBINED; + + return 1; +} +__setup("combined_mode=", combined_setup); + #ifdef CONFIG_SCSI_SATA_INTEL_COMBINED static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev) { @@ -1164,6 +1181,19 @@ static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev) if (prog & comb) return; + /* Don't reserve any so the IDE driver can get them (but only if + * combined_mode=ide). + */ + if (combined_mode == IDE) + return; + + /* Grab them both for libata if combined_mode=libata. */ + if (combined_mode == LIBATA) { + request_region(0x1f0, 8, "libata"); /* port 0 */ + request_region(0x170, 8, "libata"); /* port 1 */ + return; + } + /* SATA port is in legacy mode. Reserve port so that * IDE driver does not attempt to use it. If request_region * fails, it will be obvious at boot time, so we don't bother |