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Commit fc66de8b authored by Arun Kumar Neelakantam's avatar Arun Kumar Neelakantam
Browse files

soc: qcom: bam_dmux: Add Bam dmux drivers support 



This is a snapshot of the BAM DMUX driver as of msm-3.18
commit <49f87c56e6f2> (Merge "ASoC: msm8952: Add more dai links to support
compress capture").

Bam dmux driver provides support for multiple clients to send/receive data
faster to modem by using single A2-BAM physical connection.

CRs-Fixed: 2144615
Change-Id: I39b7a9b1df014cfbe6df1aba0f67a25ad1d47318
Signed-off-by: default avatarArun Kumar Neelakantam <aneela@codeaurora.org>
parent 901d889a

Documentation/devicetree/bindings/arm/msm/bam_dmux.txt

0 → 100644
+28 −0
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Qualcomm Technologies, Inc. BAM Data Multiplexer Driver



Required properties:

- compatible : should be "qcom,bam_dmux"

- reg : the location and size of the BAM hardware

- interrupts : the BAM hardware to apps processor interrupt line



Optional properties:

-qcom,satellite-mode: the hardware needs to be configured in satellite mode

-qcom,rx-ring-size: the size of the receive ring buffer pool, default is 32

-qcom,max-rx-mtu: the maximum receive MTU that can be negotiated, in bytes.

	Default is 2048.  Other possible values are 4096, 8192, and 16384.

-qcom,no-cpu-affinity: boolean value indicating that workqueue CPU affinity

	is not required.

-qcom,fast-shutdown: boolean value to support fast shutdown time.



Example:



	qcom,bam_dmux@fc834000 {

		compatible = "qcom,bam_dmux";

		reg = <0xfc834000 0x7000>;

		interrupts = <0 29 1>;

		qcom,satellite-mode;

		qcom,rx-ring-size = <64>;

		qcom,max-rx-mtu = <8192>;

		qcom,no-cpu-affinity;

		qcom,fast-shutdown;

	};

drivers/soc/qcom/Kconfig

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@@ -786,4 +786,13 @@ config QCOM_QDSS_BRIDGE 
	  sub-system to USB on APSS side. The driver acts as a bridge between the

	  MHI and USB interface. If unsure, say N.



config MSM_BAM_DMUX

	bool "BAM Data Mux Driver"

	depends on SPS

	help

	  Support Muxed Data Channels over BAM interface.

	  BAM has a limited number of pipes.  This driver

	  provides a means to support more logical channels

	  via muxing than BAM could without muxing.



source "drivers/soc/qcom/wcnss/Kconfig"

drivers/soc/qcom/Makefile

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@@ -96,4 +96,5 @@ obj-$(CONFIG_QMP_DEBUGFS_CLIENT) += qmp-debugfs-client.o 
obj-$(CONFIG_MSM_REMOTEQDSS) += remoteqdss.o

obj-$(CONFIG_QSEE_IPC_IRQ_BRIDGE) += qsee_ipc_irq_bridge.o

obj-$(CONFIG_QCOM_QDSS_BRIDGE) += qdss_bridge.o

obj-$(CONFIG_MSM_BAM_DMUX) += bam_dmux.o

obj-$(CONFIG_WCNSS_CORE) += wcnss/