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Commit ba22e483 authored by Eric Holmberg's avatar Eric Holmberg
Browse files

soc: qcom: glink: Initial version of G-Link Driver 



G-Link is a generic link-layer transport similar to SMD that supports a
plug-in framework for the physical transport.  This allows it to adapt
to different physical transports such as shared memory, UARTs, buses,
and DMA.

Change-Id: I7c43ebff23a6f376672d10166b1e34e197ec06dd
Signed-off-by: default avatarArun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: default avatarEric Holmberg <eholmber@codeaurora.org>
Signed-off-by: default avatarJeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: default avatarKarthikeyan Ramasubramanian <kramasub@codeaurora.org>
Signed-off-by: default avatarSteven Cahail <scahail@codeaurora.org>
Signed-off-by: default avatarZaheerulla Meer <zmeer@codeaurora.org>
Signed-off-by: default avatarAtish Patra <apatra@codeaurora.org>
parent cb0b4937

Documentation/arm/msm/glink.txt

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File added.

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

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Qualcomm Technologies, Inc. G-link RPM Native Transport



Required properties:

-compatible : should be "qcom,glink-rpm-native-xprt"

-reg : the location and size of RPM message RAM

	the irq register base address for triggering interrupts

-reg-names : "msgram" - string to identify the RPM message RAM region

		"irq-reg-base" - string to identify the irq register region

-qcom,irq-mask : the bitmark to trigger an interrupt

-interrupts : the receiving interrupt line



Example:



	qcom,glink-rpm-native-xprt@68000 {

		compatible = "qcom,glink-rpm-native-xprt";

		reg = <0x68000 0x8000>,

			<0xfa006008 0x4>;

		reg-names = "msgram", "irq-reg-base";

		qcom,irq-mask = <0x1000>;

		interrupts = <0 25 1>;

	};

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

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Qualcomm Technologies, Inc. G-link SMEM Native Transport



Required properties:

-compatible : should be "qcom,glink-smem-native-xprt"

-reg : the location and size of shared memory

	the irq register base address for triggering interrupts

-reg-names : "smem" - string to identify the shared memory region

		"irq-reg-base" - string to identify the irq register region

-qcom,irq-mask : the bitmark to trigger an interrupt

-interrupts : the receiving interrupt line

-label : the name of the subsystem this link connects to



Example:



	qcom,glink-smem-native-xprt-modem@fa00000 {

		compatible = "qcom,glink-smem-native-xprt";

		reg = <0xfa00000 0x200000>,

			<0xfa006008 0x4>;

		reg-names = "smem", "irq-reg-base";

		qcom,irq-mask = <0x1000>;

		interrupts = <0 25 1>;

		label = "mpss";

	};

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

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Qualcomm Technologies, Inc. G-Link SSR



[Root level node]

Required properties:

-compatible : should be "qcom,glink_ssr"

-label : The name of this subsystem.

-qcom,edge : The name of the edge to this subsystem.

-qcom,notify-edges : Reference to other subsystems to notify when this

	subsystem goes down.



Optional properties:

-qcom,xprt : The name of the transport on which to notify this subystem.



Example:



	glink_mpss: qcom,glink-ssr-modem {

		compatible = "qcom,glink_ssr";

		label = "modem";

		qcom,edge = "mpss";

		qcom,notify-edges = <&glink_adsp>, <&glink_wcnss>;

		qcom,xprt = "smem";

	};



	glink_adsp: qcom,glink-ssr-adsp {

		compatible = "qcom,glink_ssr";

		label = "adsp";

		qcom,edge = "adsp";

		qcom,notify-edges = <&glink_mpss>, <&glink_wcnss>;

	};



	glink_wcnss: qcom,glink-ssr-wcnss {

		compatible = "qcom,glink_ssr";

		label = "wcnss";

		qcom,edge = "wcnss";

		qcom,notify-edges = <&glink_mpss>;

	};

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

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Qualcomm Technologies, Inc. G-Link Packet Driver (glinkpkt)



[Root level node]

Required properties:

-compatible : should be "qcom,glinkpkt"



[Second level nodes]

qcom,glinkpkt-channel-names

Required properties:

-qcom,glinkpkt-transport : the glinkpkt transport layer

-qcom,glinkpkt-edge : the remote subsystem name

-qcom,glinkpkt-ch-name : the glink channel name



Example:



	qcom,glinkpkt {

		compatible = "qcom,glinkpkt";



		qcom,glinkpkt-glink1 {

			qcom,glinkpkt-transport = "smem";

			qcom,glinkpkt-edge = "mpss";

			qcom,glinkpkt-ch-name = "glink1";

		};



		qcom,glinkpkt-loopback {

			qcom,glinkpkt-transport = "smem";

			qcom,glinkpkt-edge = "mpss";

			qcom,glinkpkt-ch-name = "glink_pkt_loopback";

		};

	};