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
    - 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).

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,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 "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.

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_VDDCX-supply = <&pm8841_s2>;
		HSUSB_1p8-supply = <&pm8941_l6>;
		HSUSB_3p3-supply = <&pm8941_l24>;
		qcom,usb2-enable-hsphy2;
		qcom,usb2-power-budget = <500>;
	};

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

Example Android USB device node :
	android_usb@fc42b0c8 {
		compatible = "qcom,android-usb";
		reg = <0xfc42b0c8 0xc8>;
		qcom,android-usb-swfi-latency = <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>;
		};
	};