diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/pci/fixup.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c index 8e8e895e1b5..330fd2b6807 100644 --- a/arch/i386/pci/fixup.c +++ b/arch/i386/pci/fixup.c @@ -2,6 +2,8 @@ * Exceptions for specific devices. Usually work-arounds for fatal design flaws. */ +#include <linux/delay.h> +#include <linux/dmi.h> #include <linux/pci.h> #include <linux/init.h> #include "pci.h" @@ -384,3 +386,60 @@ static void __devinit pci_fixup_video(struct pci_dev *pdev) } } DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video); + +/* + * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A. + * + * We pretend to bring them out of full D3 state, and restore the proper + * IRQ, PCI cache line size, and BARs, otherwise the device won't function + * properly. In some cases, the device will generate an interrupt on + * the wrong IRQ line, causing any devices sharing the the line it's + * *supposed* to use to be disabled by the kernel's IRQ debug code. + */ +static u16 toshiba_line_size; + +static struct dmi_system_id __devinit toshiba_ohci1394_dmi_table[] = { + { + .ident = "Toshiba PS5 based laptop", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"), + }, + }, + { + .ident = "Toshiba PSM4 based laptop", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"), + }, + }, + { } +}; + +static void __devinit pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev) +{ + if (!dmi_check_system(toshiba_ohci1394_dmi_table)) + return; /* only applies to certain Toshibas (so far) */ + + dev->current_state = PCI_D3cold; + pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032, + pci_pre_fixup_toshiba_ohci1394); + +static void __devinit pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev) +{ + if (!dmi_check_system(toshiba_ohci1394_dmi_table)) + return; /* only applies to certain Toshibas (so far) */ + + /* Restore config space on Toshiba laptops */ + mdelay(10); + pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size); + pci_write_config_word(dev, PCI_INTERRUPT_LINE, dev->irq); + pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, + pci_resource_start(dev, 0)); + pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, + pci_resource_start(dev, 1)); +} +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032, + pci_post_fixup_toshiba_ohci1394); |