From 004c8a8bc569c8b18fca6fc90ffe3223daaf17b7 Mon Sep 17 00:00:00 2001 From: Andrey Makarov Date: Sat, 16 Jul 2022 14:32:10 +0300 Subject: Align Raspberry Pi DMA interrupts with Linux DTS There is nothing in the specs on DMA engine interrupt lines: it should have been in the "BCM2835 ARM Peripherals" datasheet but the appropriate "ARM peripherals interrupt table" (p.113) is nearly empty. All Raspberry Pi models 1-3 (based on bcm2835) have Linux device tree (arch/arm/boot/dts/bcm2835-common.dtsi +25): /* dma channel 11-14 share one irq */ This information is repeated in the driver code (drivers/dma/bcm2835-dma.c +1344): /* * in case of channel >= 11 * use the 11th interrupt and that is shared */ In this patch channels 0--10 and 11--14 are handled separately. Signed-off-by: Andrey Makarov Message-id: 20220716113210.349153-1-andrey.makarov@auriga.com [PMM: fixed checkpatch nits] Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- include/hw/arm/bcm2835_peripherals.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/hw/arm/bcm2835_peripherals.h b/include/hw/arm/bcm2835_peripherals.h index d864879..c9d25d4 100644 --- a/include/hw/arm/bcm2835_peripherals.h +++ b/include/hw/arm/bcm2835_peripherals.h @@ -17,6 +17,7 @@ #include "hw/char/bcm2835_aux.h" #include "hw/display/bcm2835_fb.h" #include "hw/dma/bcm2835_dma.h" +#include "hw/or-irq.h" #include "hw/intc/bcm2835_ic.h" #include "hw/misc/bcm2835_property.h" #include "hw/misc/bcm2835_rng.h" @@ -55,6 +56,7 @@ struct BCM2835PeripheralState { BCM2835AuxState aux; BCM2835FBState fb; BCM2835DMAState dma; + qemu_or_irq orgated_dma_irq; BCM2835ICState ic; BCM2835PropertyState property; BCM2835RngState rng; -- cgit v1.1