FiiO M3K/X1000: add USB support

This only required a minor patch to the usb-designware driver due
to DMA requiring physical addresses -- on the X1000, these differ
from virtual addresses so we have to do the usual conversion.

Both the mass storage and HID drivers work, but there are a few
issues so this can't be considered 100% stable yet.

- Mass storage might not be detected properly on insertion,
  and USB has to be replugged before it shows up
- HID driver may occasionally panic or hang the machine

Change-Id: Ia3ce7591d5928ec7cbca7953abfef01bdbd873ef

1 files changed, 2 insertions, 0 deletions

diff --git a/firmware/target/mips/ingenic_x1000/system-x1000.c b/firmware/target/mips/ingenic_x1000/system-x1000.c
index 33d8db7222..c0b0dbc65e 100644
--- a/firmware/target/mips/ingenic_x1000/system-x1000.c
+++ b/firmware/target/mips/ingenic_x1000/system-x1000.c
@@ -191,6 +191,8 @@ static void UIRQ(void)
 }
 
 #define intr(name) extern __attribute__((weak, alias("UIRQ"))) void name(void)
+/* DWC2 USB interrupt */
+#define OTG INT_USB_FUNC
 
 /* Main interrupts */
 intr(DMIC); intr(AIC);   intr(SFC);   intr(SSI0);  intr(OTG);   intr(AES);