On Friday 21 August 2009, Wu Zhangjin wrote: > Hi All, > > After reading some documents in Documentation/ and the Internet, I found > there is an interface /proc/acpi/wakeup to set the wakeup devices on > machines support ACPI. but my machine does not support ACPI, > no /proc/acpi/wakeup there. > > my machine is FuLoong2F, which is loongson based machine, it does not > support ACPI, but currently, I have made it support basic standby mode > for it has a 'wait' mode(after setting it's frequency to ZERO) and can > be waked up via an external interrupt. and here is the basic framework: > > 0. suspend: > > arch_suspend_disable_irqs(disable all interrupts) > > ... > > fuloong_pm_enter() > > ... > > arch_suspend_enable_irqs(enable all interrupts) > > 1. fuloong_pm_enter: > > setup_wakeup_interrupts() > > loongson_pm_enter(put loongson into 'wait' mode) > > 3. setup_wakeup_interrupts > > if the interrupt line is connected to loongson directly, no setup need > to do, but if there is an interrupt line connected to loongson > indirectly(i.e via i8259A), I need to get through the interrupt path via > enable(un-mask) the interrupts in interrupt controller and resuming the > devices earlier manually or enable the interrupt bit on the devices and > even or set a flag of the device driver to tell the system not suspend > this device. > > I have tried the first(resuming earlier) and second method(enable the > interrupt bit) on the 8042 keyboard o YeeLoong(another loongson-based > machine, a netbook, i8042 is connected to i8259A directly), it works > well, but not tried the third method yet. > > I guess the /proc/acpi/wakeup based method in user-space should be > something like this, but is there any relative method in kernel space? > > there are only USB interfaces on FuLoong2F machines, I guess it will be > very hard to get through the interrupt path via the above two methods(I > have tried to enable the USB interrupt in south bright, but not work), > so, is there an easier method to do it? Is your USB controller a PCI one? Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
