hikey960: enable IOMCU DMAC
There exists a third DMA controller on the hi3660
SoC called the IOMCU DMAC. This controller is used by
peripherals like SPI2 and UART3. Initialize channels 4-7
as non-secure, while 0-3 remain reserved and secure.
Signed-off-by: Ryan Grachek <ryan@edited.us>
diff --git a/plat/hisilicon/hikey960/hikey960_bl31_setup.c b/plat/hisilicon/hikey960/hikey960_bl31_setup.c
index 5d70dbf..9383265 100644
--- a/plat/hisilicon/hikey960/hikey960_bl31_setup.c
+++ b/plat/hisilicon/hikey960/hikey960_bl31_setup.c
@@ -141,6 +141,21 @@
}
}
+static void hikey960_iomcu_dma_init(void)
+{
+ int i;
+ uint32_t non_secure;
+
+ non_secure = IOMCU_DMAC_SEC_CTRL_INTR_SEC | IOMCU_DMAC_SEC_CTRL_GLOBAL_SEC;
+ mmio_write_32(IOMCU_DMAC_SEC_CTRL, non_secure);
+
+ /* channels 0-3 are reserved */
+ for (i = 4; i < IOMCU_DMAC_CHANNEL_NUMS; i++) {
+ mmio_write_32(IOMCU_DMAC_AXI_CONF(i), IOMCU_DMAC_AXI_CONF_ARPROT_NS |
+ IOMCU_DMAC_AXI_CONF_AWPROT_NS);
+ }
+}
+
void bl31_platform_setup(void)
{
/* Initialize the GIC driver, cpu and distributor interfaces */
@@ -150,6 +165,7 @@
gicv2_cpuif_enable();
hikey960_edma_init();
+ hikey960_iomcu_dma_init();
hisi_ipc_init();
}