kernel_samsung_msm8974/Documentation/devicetree/bindings/usb/msm-hsusb.txt

MSM SoC HSUSB controllers

OTG:

Required properties :
- compatible : should be "qcom,hsusb-otg"
- regs : offset and length of the register set in the memory map
- interrupts: IRQ line
- interrupt-names: OTG interrupt name(s) referenced in interrupts above
            HSUSB OTG expects "core_irq" which is IRQ line from CORE and
            optional ones are described in next section.
- qcom,hsusb-otg-phy-type: PHY type can be one of
            1 - Chipidea 45nm PHY
	    2 - Synopsis 28nm PHY
- qcom,hsusb-otg-mode: Operational mode. Can be one of
            1 - Peripheral only mode
	    2 - Host only mode
	    3 - OTG mode
	    Based on the mode, OTG driver registers platform devices for
	    gadget and host.
- qcom,hsusb-otg-control: OTG control (VBUS and ID notifications)
  can be one of
            1 - PHY control
	    2 - PMIC control
	    3 - User control (via debugfs)
- <supply-name>-supply: handle to the regulator device tree node
         Required "supply-name" is "HSUSB_VDDCX" (when voting for VDDCX) or
         "hsusb_vdd_dig" (when voting for VDDCX Corner voltage),
         "HSUSB_1p8-supply" and "HSUSB_3p3-supply".

Optional properties :
- interrupt-names : Optional interrupt resource entries are:
    "async_irq" : Interrupt from HSPHY for asynchronous wakeup events in LPM.
    "pmic_id_irq" : Interrupt from PMIC for external ID pin notification.
- qcom,hsusb-otg-disable-reset: If present then core is RESET only during
	    init, otherwise core is RESET for every cable disconnect as well
- qcom,hsusb-otg-pnoc-errata-fix: If present then workaround for PNOC
	    performance issue is applied which requires changing the mem-type
	    attribute via VMIDMT.
- qcom,hsusb-otg-default-mode: The default USB mode after boot-up.
  Applicable only when OTG is controlled by user. Can be one of
            0 - None. Low power mode
            1 - Peripheral
	    2 - Host
- qcom,hsusb-otg-phy-init-seq: PHY configuration sequence. val, reg pairs
  terminate with -1
- qcom,hsusb-otg-power-budget: VBUS power budget in mA
  0 will be treated as 500mA
- qcom,hsusb-otg-pclk-src-name: The source of pclk
- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for
  below optional properties:
    - qcom,msm_bus,name
    - qcom,msm_bus,num_cases - There are three valid cases for this: NONE, MAX
		and MIN bandwidth votes. Minimum two cases must be defined for
		both NONE and MAX votes. If MIN vote is different from NONE VOTE
		then specify third case for MIN VOTE.
    - qcom,msm_bus,active_only
    - qcom,msm_bus,num_paths
    - qcom,msm_bus,vectors
- qcom,hsusb-otg-lpm-on-dev-suspend: If present then USB enter to
	    low power mode upon receiving bus suspend.
- qcom,hsusb-otg-clk-always-on-workaround: If present then USB core clocks
	    remain active upon receiving bus suspend and USB cable is connected.
	    Used for allowing USB to respond for remote wakup.
- qcom,hsusb-otg-delay-lpm: If present then USB core will wait one second
	after disconnect before entering low power mode.
- qcom,hsusb-otg-delay-lpm-hndshk-on-disconnect: If present then USB core will
	wait for the handshake with the IPA to complete before entering low
	power mode.
- <supply-name>-supply: handle to the regulator device tree node.
         Optional "supply-name" is "vbus_otg" to supply vbus in host mode.
- qcom,vdd-voltage-level: This property must be a list of three integer
	values (no, min, max) where each value represents either a voltage
	in microvolts or a value corresponding to voltage corner.
- qcom,dp-manual-pullup: If present, vbus is not routed to USB controller/phy
	and controller driver therefore enables pull-up explicitly before
	starting controller using usbcmd run/stop bit.
- qcom,usb2-enable-hsphy2: If present then USB2 controller is connected to 2nd
	HSPHY.
- qcom,hsusb-log2-itc: value of 2^(log2_itc-1) will be used as the
	interrupt threshold (ITC), when log2_itc is between 1 to 7.
- qcom,hsusb-l1-supported: If present, the device supports l1 (Link power
	management).
- qcom,no-selective-suspend: If present selective suspend is disabled on hub ports.
- qcom,hsusb-otg-mpm-dpsehv-int: If present, indicates mpm interrupt to be configured
	for detection of dp line transition during VDD minimization.
- qcom,hsusb-otg-mpm-dmsehv-int: If present, indicates mpm interrupt to be configured
	for detection of dm line transition during VDD minimization.
- qcom,ahb-async-bridge-bypass: If present, indicates that enable AHB2AHB By Pass
	mode with device controller for better throughput. With this mode, USB Core
	runs using PNOC clock and synchronous to it. Hence it is must to have proper
	"qcom,msm_bus,vectors" to have high bus frequency. User shouldn't try to
	enable this feature without proper bus voting.
-qcom,disable-retention-with-vdd-min: If present dont allow phy retention but allow
	vdd min.
- qcom,usbin-vadc: Corresponding vadc device's phandle to read usbin voltage using VADC.
	This will be used to get value of usb power supply's VOLTAGE_NOW property.

Example HSUSB OTG controller device node :
	usb@f9690000 {
		compatible = "qcom,hsusb-otg";
		reg = <0xf9690000 0x400>;
		interrupts = <134>;
		interrupt-names = "core_irq";

		qcom,hsusb-otg-phy-type = <2>;
		qcom,hsusb-otg-mode = <1>;
		qcom,hsusb-otg-otg-control = <1>;
		qcom,hsusb-otg-disable-reset;
		qcom,hsusb-otg-pnoc-errata-fix;
		qcom,hsusb-otg-default-mode = <2>;
		qcom,hsusb-otg-phy-init-seq = <0x01 0x90 0xffffffff>;
		qcom,hsusb-otg-power-budget = <500>;
		qcom,hsusb-otg-pclk-src-name = "dfab_usb_clk";
		qcom,hsusb-otg-lpm-on-dev-suspend;
		qcom,hsusb-otg-clk-always-on-workaround;
		hsusb_vdd_dig-supply = <&pm8226_s1_corner>;
                HSUSB_1p8-supply = <&pm8226_l10>;
                HSUSB_3p3-supply = <&pm8226_l20>;
		qcom,vdd-voltage-level = <1 5 7>;
		qcom,dp-manual-pullup;
		qcom,disable-retention-with-vdd-min;
		qcom,hsusb-otg-dpsehv-int = <49>;
		qcom,hsusb-otg-dmsehv-int = <58>;
		qcom,usbin-vadc = <&pm8226_vadc>;
		qcom,msm_bus,name = "usb2";
		qcom,msm_bus,num_cases = <2>;
		qcom,msm_bus,active_only = <0>;
		qcom,msm_bus,num_paths = <1>;
		qcom,msm_bus,vectors =
				<87 512 0 0>,
				<87 512 60000000 960000000>;
	};

MSM HSUSB EHCI controller

Required properties :
- compatible : should be "qcom,ehci-host"
- reg : offset and length of the register set in the memory map
- interrupts: IRQ lines used by this controller
- interrupt-names : Required interrupt resource entries are:
            HSUSB EHCI expects "core_irq" and optionally "async_irq".
- <supply-name>-supply: handle to the regulator device tree node
  Required "supply-name" is either "hsusb_vdd_dig" or "HSUSB_VDDCX"
  "HSUSB_1p8-supply" "HSUSB_3p3-supply".
- qcom,usb2-power-budget: maximum vbus power (in mA) that can be provided.

Optional properties :
- qcom,usb2-enable-hsphy2: If present, select second PHY for USB operation.
- qcom,resume-gpio: if present then peripheral connected to usb controller
  cannot wakeup from XO shutdown using in-band usb bus resume. Use resume
  gpio to wakeup peripheral.
- qcom,vdd-voltage-level: This property must be a list of five integer
  values (no, 0.5vsuspend, 0.75suspend, min, max) where each value respresents
  either a voltage in microvolts or a value corresponding to voltage corner.
  First value represents value to vote when USB is not at all active, second
  value represents value to vote when target is not connected to dock during low
  power mode, third value represents vlaue to vote when target is connected to dock
  and no peripheral connected over dock during low power mode, fourth value represents
  minimum value to vote when USB is operational, fifth item represents maximum value
  to vote for USB is operational.
- qcom,usb2-enable-uicc: If present, usb2 port will be used for uicc card connection.

Example MSM HSUSB EHCI controller device node :
	ehci: qcom,ehci-host@f9a55000 {
		compatible = "qcom,ehci-host";
		reg = <0xf9a55000 0x400>;
		interrupts = <0 134 0>, <0 140 0>;
		interrupt-names = "core_irq", "async_irq";
		hsusb_vdd_dig-supply = <&pm8841_s2_corner>;
		HSUSB_1p8-supply = <&pm8941_l6>;
		HSUSB_3p3-supply = <&pm8941_l24>;
		qcom,usb2-enable-hsphy2;
		qcom,usb2-power-budget = <500>;
		qcom,vdd-voltage-level = <1 2 3 5 7>;
		qcom,usb2-enable-uicc;
	};

ANDROID USB:

Required properties:
- compatible: should be "qcom,android-usb"

Optional properties :
- reg  : offset and length of memory region that is used by device to
  update USB PID and serial numbers used by bootloader in DLOAD mode.
- qcom,android-usb-swfi-latency : value to be used by device to vote
  for DMA latency in microsecs.
- qcom,android-usb-cdrom : if this property is present then device creates
  a new LUN as CD-ROM
- qcom,android-usb-internal-ums : if this property is present then device
  creates a new LUN as internal usb mass storage.
- qcom,streaming-func : add list of usb function name. If mention usb function
  is being enable as part of USB composition, streaming mode is enable with
  usb device controller to get better throughput. NOTE: Inverted CRC and
  turnaround timeout is observed on enabling streaming. Hence it is required
  to see these errors and number of erros on enabling this at USB level to make
  final decision to enable this feature or not.
- qcom,android-usb-uicc-nluns : Number of mass storage LUNs required for
  the UICC card.
Example Android USB device node :
	android_usb@fc42b0c8 {
		compatible = "qcom,android-usb";
		reg = <0xfc42b0c8 0xc8>;
		qcom,android-usb-swfi-latency = <1>;
		qcom,streaming-func = "rndis","mtp";
		qcom,android-usb-uicc-nluns = <1>;
	};


BAM:

Required properties:
- compatible: should be "qcom,usb-bam-msm"
- reg  : pairs of physical base addresses and region sizes
            of all the memory mapped BAM devices present
- reg-names : Register region name(s), in 1-1 correspondence with the
	    registers in 'reg'. This list should contain at least as many names
            as the number of unique values given in both 'usb-active-bam' and
            all the subnodes' 'usb-bam-type' properties.

            If SSUSB_BAM is used, "ssusb" should be present.
            If HSUSB_BAM is used, "hsusb" should be present.
            If HSIC_BAM is used, "hsic" should be present.

            If a QSCRATCH RAM1 register is designated for providing USB3
            private memory to use as a BAM FIFO, specify "qscratch_ram1_reg".
- interrupts: IRQ lines for BAM devices
- interrupt-names: BAM interrupt name(s), in 1-1 correspondence with
            'interrupts' above.

            If SSUSB_BAM is used, "ssusb" should be present.
            If HSUSB_BAM is used, "hsusb" should be present.
            If HSIC_BAM is used, "hsic" should be present.
- qcom,usb-bam-num-pipes: max number of pipes that can be used

Optional properties:
- qcom,usb-bam-fifo-baseaddr: base address for bam pipe's data and descriptor
  fifos. This can be on chip memory (ocimem) or usb private memory. This
  property is required if sub-node's mem-type is ocimem or usb private mem.

A number of USB BAM pipe parameters are represented as sub-nodes:

Subnode Required:
- label: a string describing uniquely the usb bam pipe. The string can be
  constracted as follows: <core>-<peer>-<direction>-<pipe num>.
	core options: hsusb, ssusb/dwc3, hsic
	peer options: qdss, ipa, a2
	direction options: in (from peer to usb), out (from usb to peer)
	pipe num options: 0..127
- qcom,usb-bam-mem-type: Type of memory used by this PIPE. Can be one of
            0 - Uses SPS's dedicated pipe memory
            1 - USB's private memory residing @ 'qcom,usb-bam-fifo-baseaddr'
            2 - System RAM allocated by driver
	    3 - OCI memory residing @ 'qcom,usb-bam-fifo-baseaddr'
- qcom,bam-type: BAM type can be one of
	0 - SSUSB_BAM
	1 - HSUSB_BAM
	2 - HSIC_BAM
- qcom,dir: pipe direction
	0 - from usb (out)
	1 - to usb (in)
- qcom,pipe-num: pipe number
- qcom,peer-bam: peer BAM can be one of
	0 - A2_P_BAM
	1 - QDSS_P_BAM
	2 - IPA_P_BAM
- qcom,data-fifo-size: data fifo size
- qcom,descriptor-fifo-size: descriptor fifo size

Optional Properties for Subnode:
- qcom,reset-bam-on-connect: If present then BAM is RESET before connecting
  pipe. This may be required if BAM peripheral is also reset before connect.
- qcom,dst-bam-physical-address: destination BAM physical address
- qcom,dst-bam-pipe-index: destination BAM pipe index
- qcom,src-bam-physical-address: source BAM physical address
- qcom,src-bam-pipe-index: source BAM pipe index
- qcom,data-fifo-offset: data fifo offset address
- qcom,descriptor-fifo-offset: descriptor fifo offset address

Optional properties :
- qcom,ignore-core-reset-ack: If present then BAM ignores ACK from USB core
	    while performing PIPE RESET
- qcom,disable-clk-gating: If present then disable BAM clock gating.

Example USB BAM controller device node:

	qcom,usbbam@f9a44000 {
		compatible = "qcom,usb-bam-msm";
		reg = <0xf9a44000 0x11000>;
		reg-names = "hsusb";
		interrupts = <0 135 0>;
		interrupt-names = "hsusb";
		qcom,usb-bam-num-pipes = <16>;
		qcom,ignore-core-reset-ack;
		qcom,disable-clk-gating;

		qcom,pipe0 {
			label = "hsusb-ipa-out-0";
			qcom,usb-bam-mem-type = <0>;
			qcom,bam-type = <1>;
			qcom,dir = <0>;
			qcom,pipe-num = <0>;
			qcom,peer-bam = <2>;
			qcom,src-bam-physical-address = <0xf9a44000>;
			qcom,src-bam-pipe-index = <1>;
			qcom,data-fifo-offset = <0x2200>;
			qcom,data-fifo-size = <0x1e00>;
			qcom,descriptor-fifo-offset = <0x2100>;
			qcom,descriptor-fifo-size = <0x100>;
		};
		qcom,pipe1 {
			label = "hsusb-ipa-in-0";
			qcom,usb-bam-mem-type = <0>;
			qcom,bam-type = <1>;
			qcom,dir = <1>;
			qcom,pipe-num = <0>;
			qcom,peer-bam = <2>;
			qcom,dst-bam-physical-address = <0xf9a44000>;
			qcom,dst-bam-pipe-index = <0>;
			qcom,data-fifo-offset = <0x300>;
			qcom,data-fifo-size = <0x1e00>;
			qcom,descriptor-fifo-offset = <0>;
			qcom,descriptor-fifo-size = <0x300>;
		};
	};