New binding document for
Texas Instruments K3 NAVSS Unified DMA – Peripheral Root Complex (UDMA-P).
UDMA-P is introduced as part of the K3 architecture and can be found in
AM654 and j721e.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
---
.../devicetree/bindings/dma/ti/k3-udma.txt | 185 ++++++++++++++++++
include/dt-bindings/dma/k3-udma.h | 10 +
2 files changed, 195 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/ti/k3-udma.txt
create mode 100644 include/dt-bindings/dma/k3-udma.h
diff --git a/Documentation/devicetree/bindings/dma/ti/k3-udma.txt b/Documentation/devicetree/bindings/dma/ti/k3-udma.txt
new file mode 100644
index 000000000000..3a8816ec9ce0
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/ti/k3-udma.txt
@@ -0,0 +1,185 @@
+* Texas Instruments K3 NAVSS Unified DMA – Peripheral Root Complex (UDMA-P)
+
+The UDMA-P is intended to perform similar (but significantly upgraded) functions
+as the packet-oriented DMA used on previous SoC devices. The UDMA-P module
+supports the transmission and reception of various packet types. The UDMA-P is
+architected to facilitate the segmentation and reassembly of SoC DMA data
+structure compliant packets to/from smaller data blocks that are natively
+compatible with the specific requirements of each connected peripheral. Multiple
+Tx and Rx channels are provided within the DMA which allow multiple segmentation
+or reassembly operations to be ongoing. The DMA controller maintains state
+information for each of the channels which allows packet segmentation and
+reassembly operations to be time division multiplexed between channels in order
+to share the underlying DMA hardware. An external DMA scheduler is used to
+control the ordering and rate at which this multiplexing occurs for Transmit
+operations. The ordering and rate of Receive operations is indirectly controlled
+by the order in which blocks are pushed into the DMA on the Rx PSI-L interface.
+
+The UDMA-P also supports acting as both a UTC and UDMA-C for its internal
+channels. Channels in the UDMA-P can be configured to be either Packet-Based or
+Third-Party channels on a channel by channel basis.
+
+All transfers within NAVSS is done between PSI-L source and destination threads.
+The peripherals serviced by UDMA can be PSI-L native (sa2ul, cpsw, etc) or
+legacy, non PSI-L native peripherals. In the later case a special, small PDMA is
+tasked to act as a bridge between the PSI-L fabric and the legacy peripheral.
+
+PDMAs can be configured via UDMAP peer registers to match with the configuration
+of the legacy peripheral.
+
+Required properties:
+--------------------
+- compatible: Should be
+ "ti,am654-navss-main-udmap" for am654 main NAVSS UDMAP
+ "ti,am654-navss-mcu-udmap" for am654 mcu NAVSS UDMAP
+ "ti,j721e-navss-main-udmap" for j721e main NAVSS UDMAP
+ "ti,j721e-navss-mcu-udmap" for j721e mcu NAVSS UDMAP
+- #dma-cells: Should be set to <3>.
+ - The first parameter is a phandle to the remote PSI-L
+ endpoint
+ - The second parameter is the thread offset within the
+ remote thread ID range
+ - The third parameter is the channel direction.
+- reg: Memory map of UDMAP
+- reg-names: "gcfg", "rchanrt", "tchanrt"
+- msi-parent: phandle for "ti,sci-inta" interrupt controller
+- ti,ringacc: phandle for the ring accelerator node
+- ti,psil-base: PSI-L thread ID base of the UDMAP channels
+- ti,sci: phandle on TI-SCI compatible System controller node
+- ti,sci-dev-id: TI-SCI device id
+- ti,sci-rm-range-tchan: UDMA tchan resource list in pairs of type and subtype
+- ti,sci-rm-range-rchan: UDMA rchan resource list in pairs of type and subtype
+- ti,sci-rm-range-rflow: UDMA rflow resource list in pairs of type and subtype
+
+For PSI-L thread management the parent NAVSS node must have:
+- ti,sci: phandle on TI-SCI compatible System controller node
+- ti,sci-dev-id: TI-SCI device id of the NAVSS instance
+
+Remote PSI-L endpoint
+
+Required properties:
+--------------------
+- ti,psil-base: PSI-L thread ID base of the endpoint
+
+Within the PSI-L endpoint node thread configuration subnodes must present with:
+psil-configX naming convention, where X is the thread ID offset.
+
+Configuration node Optional properties:
+--------------------
+- ti,pdma-statictr-type:In case the remote endpoint (PDMAs) requires StaticTR
+ configuration:
+ - PSIL_STATIC_TR_XY (1): XY type of StaticTR
+ For endpoints without StaticTR the property is not
+ needed or to be set PSIL_STATIC_TR_NONE (0).
+- ti,pdma-enable-acc32: Force 32 bit access on peripheral port. Only valid for
+ XY type StaticTR, not supported on am654.
+ Must be enabled for threads servicing McASP with AFIFO
+ bypass mode.
+- ti,pdma-enable-burst: Enable burst access on peripheral port. Only valid for
+ XY type StaticTR, not supported on am654.
+- ti,channel-tpl: Channel Throughput level:
+ 0 / or not present - normal channel
+ 1 - High Throughput channel
+ 2 - Ultra High Throughput channel (j721e only)
+- ti,needs-epib: If the endpoint require EPIB to be present in the
+ descriptor.
+- ti,psd-size: Size of the Protocol Specific Data section of the
+ descriptor.
+- ti,notdpkt: The Teardown Completion Message on the thread must be
+ suppressed.
+
+Example:
+
+main_navss: main_navss {
+ compatible = "simple-bus";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ dma-coherent;
+ dma-ranges;
+ ranges;
+
+ ti,sci = <&dmsc>;
+ ti,sci-dev-id = <118>;
+
+ main_udmap: dma-controller@31150000 {
+ compatible = "ti,j721e-navss-main-udmap";
+ reg = <0x0 0x31150000 0x0 0x100>,
+ <0x0 0x34000000 0x0 0x100000>,
+ <0x0 0x35000000 0x0 0x100000>;
+ reg-names = "gcfg", "rchanrt", "tchanrt";
+ #dma-cells = <3>;
+
+ ti,ringacc = <&main_ringacc>;
+ ti,psil-base = <0x1000>;
+
+ interrupt-parent = <&main_udmass_inta>;
+
+ ti,sci = <&dmsc>;
+ ti,sci-dev-id = <212>;
+
+ ti,sci-rm-range-tchan = <0x0d>, /* TX_CHAN */
+ <0x0f>, /* TX_HCHAN */
+ <0x10>; /* TX_UHCHAN */
+ ti,sci-rm-range-rchan = <0x0a>, /* RX_CHAN */
+ <0x0b>, /* RX_HCHAN */
+ <0x0c>; /* RX_UHCHAN */
+ ti,sci-rm-range-rflow = <0x00>; /* GP RFLOW */
+ };
+};
+
+psilss@340c000 {
+ /* PSILSS1 AASRC */
+ compatible = "ti,j721e-psilss";
+ reg = <0x0 0x0340c000 0x0 0x1000>;
+ reg-names = "config";
+
+ pdma_main_mcasp_g0: pdma_main_mcasp_g0 {
+ /* PDMA6 (PDMA_MCASP_G0) */
+ ti,psil-base = <0x4400>;
+
+ /* psil-config0 */
+ psil-config0 {
+ ti,pdma-statictr-type = <PDMA_STATIC_TR_XY>;
+ ti,pdma-enable-acc32;
+ ti,pdma-enable-burst;
+ };
+ };
+};
+
+mcasp0: mcasp@02B00000 {
+...
+ /* tx: PDMA_MAIN_MCASP_G0-0, rx: PDMA_MAIN_MCASP_G0-0 */
+ dmas = <&main_udmap &pdma_main_mcasp_g0 0 UDMA_DIR_TX>,
+ <&main_udmap &pdma_main_mcasp_g0 0 UDMA_DIR_RX>;
+ dma-names = "tx", "rx";
+...
+};
+
+crypto: crypto@4E00000 {
+ compatible = "ti,sa2ul-crypto";
+...
+
+ /* tx: crypto_pnp-1, rx: crypto_pnp-1 */
+ dmas = <&main_udmap &crypto 0 UDMA_DIR_TX>,
+ <&main_udmap &crypto 0 UDMA_DIR_RX>,
+ <&main_udmap &crypto 1 UDMA_DIR_RX>;
+ dma-names = "tx", "rx1", "rx2";
+...
+ psil-config0 {
+ ti,needs-epib;
+ ti,psd-size = <64>;
+ ti,notdpkt;
+ };
+
+ psil-config1 {
+ ti,needs-epib;
+ ti,psd-size = <64>;
+ ti,notdpkt;
+ };
+
+ psil-config2 {
+ ti,needs-epib;
+ ti,psd-size = <64>;
+ ti,notdpkt;
+ };
+};
diff --git a/include/dt-bindings/dma/k3-udma.h b/include/dt-bindings/dma/k3-udma.h
new file mode 100644
index 000000000000..7479d991a147
--- /dev/null
+++ b/include/dt-bindings/dma/k3-udma.h
@@ -0,0 +1,10 @@
+#ifndef __DT_TI_UDMA_H
+#define __DT_TI_UDMA_H
+
+#define UDMA_DIR_TX 0
+#define UDMA_DIR_RX 1
+
+#define PDMA_STATIC_TR_NONE 0
+#define PDMA_STATIC_TR_XY 1
+
+#endif /* __DT_TI_UDMA_H */
--
Peter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
