powerpc: Refactor device tree binding
Split device tree binding out of booting-without-of.txt and put them into their own files per binding. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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Kumar Gala
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4xx/Axon EMAC ethernet nodes
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The EMAC ethernet controller in IBM and AMCC 4xx chips, and also
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the Axon bridge. To operate this needs to interact with a ths
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special McMAL DMA controller, and sometimes an RGMII or ZMII
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interface. In addition to the nodes and properties described
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below, the node for the OPB bus on which the EMAC sits must have a
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correct clock-frequency property.
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i) The EMAC node itself
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Required properties:
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- device_type : "network"
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- compatible : compatible list, contains 2 entries, first is
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"ibm,emac-CHIP" where CHIP is the host ASIC (440gx,
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405gp, Axon) and second is either "ibm,emac" or
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"ibm,emac4". For Axon, thus, we have: "ibm,emac-axon",
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"ibm,emac4"
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- interrupts : <interrupt mapping for EMAC IRQ and WOL IRQ>
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- interrupt-parent : optional, if needed for interrupt mapping
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- reg : <registers mapping>
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- local-mac-address : 6 bytes, MAC address
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- mal-device : phandle of the associated McMAL node
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- mal-tx-channel : 1 cell, index of the tx channel on McMAL associated
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with this EMAC
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- mal-rx-channel : 1 cell, index of the rx channel on McMAL associated
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with this EMAC
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- cell-index : 1 cell, hardware index of the EMAC cell on a given
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ASIC (typically 0x0 and 0x1 for EMAC0 and EMAC1 on
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each Axon chip)
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- max-frame-size : 1 cell, maximum frame size supported in bytes
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- rx-fifo-size : 1 cell, Rx fifo size in bytes for 10 and 100 Mb/sec
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operations.
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For Axon, 2048
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- tx-fifo-size : 1 cell, Tx fifo size in bytes for 10 and 100 Mb/sec
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operations.
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For Axon, 2048.
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- fifo-entry-size : 1 cell, size of a fifo entry (used to calculate
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thresholds).
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For Axon, 0x00000010
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- mal-burst-size : 1 cell, MAL burst size (used to calculate thresholds)
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in bytes.
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For Axon, 0x00000100 (I think ...)
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- phy-mode : string, mode of operations of the PHY interface.
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Supported values are: "mii", "rmii", "smii", "rgmii",
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"tbi", "gmii", rtbi", "sgmii".
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For Axon on CAB, it is "rgmii"
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- mdio-device : 1 cell, required iff using shared MDIO registers
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(440EP). phandle of the EMAC to use to drive the
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MDIO lines for the PHY used by this EMAC.
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- zmii-device : 1 cell, required iff connected to a ZMII. phandle of
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the ZMII device node
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- zmii-channel : 1 cell, required iff connected to a ZMII. Which ZMII
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channel or 0xffffffff if ZMII is only used for MDIO.
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- rgmii-device : 1 cell, required iff connected to an RGMII. phandle
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of the RGMII device node.
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For Axon: phandle of plb5/plb4/opb/rgmii
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- rgmii-channel : 1 cell, required iff connected to an RGMII. Which
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RGMII channel is used by this EMAC.
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Fox Axon: present, whatever value is appropriate for each
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EMAC, that is the content of the current (bogus) "phy-port"
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property.
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Optional properties:
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- phy-address : 1 cell, optional, MDIO address of the PHY. If absent,
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a search is performed.
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- phy-map : 1 cell, optional, bitmap of addresses to probe the PHY
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for, used if phy-address is absent. bit 0x00000001 is
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MDIO address 0.
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For Axon it can be absent, though my current driver
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doesn't handle phy-address yet so for now, keep
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0x00ffffff in it.
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- rx-fifo-size-gige : 1 cell, Rx fifo size in bytes for 1000 Mb/sec
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operations (if absent the value is the same as
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rx-fifo-size). For Axon, either absent or 2048.
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- tx-fifo-size-gige : 1 cell, Tx fifo size in bytes for 1000 Mb/sec
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operations (if absent the value is the same as
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tx-fifo-size). For Axon, either absent or 2048.
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- tah-device : 1 cell, optional. If connected to a TAH engine for
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offload, phandle of the TAH device node.
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- tah-channel : 1 cell, optional. If appropriate, channel used on the
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TAH engine.
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Example:
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EMAC0: ethernet@40000800 {
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device_type = "network";
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compatible = "ibm,emac-440gp", "ibm,emac";
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interrupt-parent = <&UIC1>;
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interrupts = <1c 4 1d 4>;
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reg = <40000800 70>;
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local-mac-address = [00 04 AC E3 1B 1E];
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mal-device = <&MAL0>;
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mal-tx-channel = <0 1>;
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mal-rx-channel = <0>;
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cell-index = <0>;
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max-frame-size = <5dc>;
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rx-fifo-size = <1000>;
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tx-fifo-size = <800>;
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phy-mode = "rmii";
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phy-map = <00000001>;
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zmii-device = <&ZMII0>;
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zmii-channel = <0>;
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};
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ii) McMAL node
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Required properties:
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- device_type : "dma-controller"
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- compatible : compatible list, containing 2 entries, first is
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"ibm,mcmal-CHIP" where CHIP is the host ASIC (like
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emac) and the second is either "ibm,mcmal" or
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"ibm,mcmal2".
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For Axon, "ibm,mcmal-axon","ibm,mcmal2"
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- interrupts : <interrupt mapping for the MAL interrupts sources:
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5 sources: tx_eob, rx_eob, serr, txde, rxde>.
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For Axon: This is _different_ from the current
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firmware. We use the "delayed" interrupts for txeob
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and rxeob. Thus we end up with mapping those 5 MPIC
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interrupts, all level positive sensitive: 10, 11, 32,
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33, 34 (in decimal)
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- dcr-reg : < DCR registers range >
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- dcr-parent : if needed for dcr-reg
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- num-tx-chans : 1 cell, number of Tx channels
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- num-rx-chans : 1 cell, number of Rx channels
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iii) ZMII node
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Required properties:
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- compatible : compatible list, containing 2 entries, first is
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"ibm,zmii-CHIP" where CHIP is the host ASIC (like
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EMAC) and the second is "ibm,zmii".
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For Axon, there is no ZMII node.
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- reg : <registers mapping>
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iv) RGMII node
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Required properties:
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- compatible : compatible list, containing 2 entries, first is
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"ibm,rgmii-CHIP" where CHIP is the host ASIC (like
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EMAC) and the second is "ibm,rgmii".
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For Axon, "ibm,rgmii-axon","ibm,rgmii"
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- reg : <registers mapping>
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- revision : as provided by the RGMII new version register if
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available.
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For Axon: 0x0000012a
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@ -0,0 +1,50 @@
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Specifying GPIO information for devices
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============================================
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1) gpios property
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-----------------
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Nodes that makes use of GPIOs should define them using `gpios' property,
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format of which is: <&gpio-controller1-phandle gpio1-specifier
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&gpio-controller2-phandle gpio2-specifier
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0 /* holes are permitted, means no GPIO 3 */
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&gpio-controller4-phandle gpio4-specifier
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...>;
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Note that gpio-specifier length is controller dependent.
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gpio-specifier may encode: bank, pin position inside the bank,
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whether pin is open-drain and whether pin is logically inverted.
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Example of the node using GPIOs:
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node {
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gpios = <&qe_pio_e 18 0>;
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};
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In this example gpio-specifier is "18 0" and encodes GPIO pin number,
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and empty GPIO flags as accepted by the "qe_pio_e" gpio-controller.
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2) gpio-controller nodes
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------------------------
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Every GPIO controller node must have #gpio-cells property defined,
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this information will be used to translate gpio-specifiers.
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Example of two SOC GPIO banks defined as gpio-controller nodes:
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qe_pio_a: gpio-controller@1400 {
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#gpio-cells = <2>;
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compatible = "fsl,qe-pario-bank-a", "fsl,qe-pario-bank";
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reg = <0x1400 0x18>;
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gpio-controller;
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};
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qe_pio_e: gpio-controller@1460 {
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#gpio-cells = <2>;
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compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank";
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reg = <0x1460 0x18>;
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gpio-controller;
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};
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@ -0,0 +1,19 @@
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MDIO on GPIOs
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Currently defined compatibles:
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- virtual,gpio-mdio
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MDC and MDIO lines connected to GPIO controllers are listed in the
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gpios property as described in section VIII.1 in the following order:
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MDC, MDIO.
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Example:
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mdio {
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compatible = "virtual,mdio-gpio";
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#address-cells = <1>;
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#size-cells = <0>;
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gpios = <&qe_pio_a 11
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&qe_pio_c 6>;
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};
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@ -0,0 +1,521 @@
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Marvell Discovery mv64[345]6x System Controller chips
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===========================================================
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The Marvell mv64[345]60 series of system controller chips contain
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many of the peripherals needed to implement a complete computer
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system. In this section, we define device tree nodes to describe
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the system controller chip itself and each of the peripherals
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which it contains. Compatible string values for each node are
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prefixed with the string "marvell,", for Marvell Technology Group Ltd.
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1) The /system-controller node
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This node is used to represent the system-controller and must be
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present when the system uses a system controller chip. The top-level
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system-controller node contains information that is global to all
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devices within the system controller chip. The node name begins
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with "system-controller" followed by the unit address, which is
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the base address of the memory-mapped register set for the system
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controller chip.
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Required properties:
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- ranges : Describes the translation of system controller addresses
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for memory mapped registers.
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- clock-frequency: Contains the main clock frequency for the system
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controller chip.
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- reg : This property defines the address and size of the
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memory-mapped registers contained within the system controller
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chip. The address specified in the "reg" property should match
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the unit address of the system-controller node.
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- #address-cells : Address representation for system controller
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devices. This field represents the number of cells needed to
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represent the address of the memory-mapped registers of devices
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within the system controller chip.
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- #size-cells : Size representation for for the memory-mapped
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registers within the system controller chip.
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- #interrupt-cells : Defines the width of cells used to represent
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interrupts.
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Optional properties:
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- model : The specific model of the system controller chip. Such
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as, "mv64360", "mv64460", or "mv64560".
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- compatible : A string identifying the compatibility identifiers
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of the system controller chip.
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The system-controller node contains child nodes for each system
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controller device that the platform uses. Nodes should not be created
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for devices which exist on the system controller chip but are not used
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Example Marvell Discovery mv64360 system-controller node:
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system-controller@f1000000 { /* Marvell Discovery mv64360 */
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#address-cells = <1>;
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#size-cells = <1>;
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model = "mv64360"; /* Default */
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compatible = "marvell,mv64360";
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clock-frequency = <133333333>;
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reg = <0xf1000000 0x10000>;
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virtual-reg = <0xf1000000>;
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ranges = <0x88000000 0x88000000 0x1000000 /* PCI 0 I/O Space */
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0x80000000 0x80000000 0x8000000 /* PCI 0 MEM Space */
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0xa0000000 0xa0000000 0x4000000 /* User FLASH */
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0x00000000 0xf1000000 0x0010000 /* Bridge's regs */
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0xf2000000 0xf2000000 0x0040000>;/* Integrated SRAM */
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[ child node definitions... ]
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}
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2) Child nodes of /system-controller
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a) Marvell Discovery MDIO bus
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The MDIO is a bus to which the PHY devices are connected. For each
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device that exists on this bus, a child node should be created. See
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the definition of the PHY node below for an example of how to define
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a PHY.
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Required properties:
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- #address-cells : Should be <1>
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- #size-cells : Should be <0>
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- device_type : Should be "mdio"
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- compatible : Should be "marvell,mv64360-mdio"
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Example:
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mdio {
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#address-cells = <1>;
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#size-cells = <0>;
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device_type = "mdio";
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compatible = "marvell,mv64360-mdio";
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ethernet-phy@0 {
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......
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};
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};
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b) Marvell Discovery ethernet controller
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The Discover ethernet controller is described with two levels
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of nodes. The first level describes an ethernet silicon block
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and the second level describes up to 3 ethernet nodes within
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that block. The reason for the multiple levels is that the
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registers for the node are interleaved within a single set
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of registers. The "ethernet-block" level describes the
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shared register set, and the "ethernet" nodes describe ethernet
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port-specific properties.
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Ethernet block node
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Required properties:
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- #address-cells : <1>
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- #size-cells : <0>
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- compatible : "marvell,mv64360-eth-block"
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- reg : Offset and length of the register set for this block
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Example Discovery Ethernet block node:
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ethernet-block@2000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "marvell,mv64360-eth-block";
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reg = <0x2000 0x2000>;
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ethernet@0 {
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.......
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};
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};
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Ethernet port node
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Required properties:
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- device_type : Should be "network".
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- compatible : Should be "marvell,mv64360-eth".
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- reg : Should be <0>, <1>, or <2>, according to which registers
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within the silicon block the device uses.
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- interrupts : <a> where a is the interrupt number for the port.
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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- phy : the phandle for the PHY connected to this ethernet
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controller.
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- local-mac-address : 6 bytes, MAC address
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Example Discovery Ethernet port node:
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ethernet@0 {
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device_type = "network";
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compatible = "marvell,mv64360-eth";
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reg = <0>;
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interrupts = <32>;
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interrupt-parent = <&PIC>;
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phy = <&PHY0>;
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local-mac-address = [ 00 00 00 00 00 00 ];
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};
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c) Marvell Discovery PHY nodes
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Required properties:
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- device_type : Should be "ethernet-phy"
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- interrupts : <a> where a is the interrupt number for this phy.
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- interrupt-parent : the phandle for the interrupt controller that
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services interrupts for this device.
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- reg : The ID number for the phy, usually a small integer
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Example Discovery PHY node:
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ethernet-phy@1 {
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device_type = "ethernet-phy";
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compatible = "broadcom,bcm5421";
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interrupts = <76>; /* GPP 12 */
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interrupt-parent = <&PIC>;
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reg = <1>;
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};
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d) Marvell Discovery SDMA nodes
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Represent DMA hardware associated with the MPSC (multiprotocol
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serial controllers).
|
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Required properties:
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- compatible : "marvell,mv64360-sdma"
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- reg : Offset and length of the register set for this device
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- interrupts : <a> where a is the interrupt number for the DMA
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device.
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery SDMA node:
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sdma@4000 {
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compatible = "marvell,mv64360-sdma";
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reg = <0x4000 0xc18>;
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virtual-reg = <0xf1004000>;
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interrupts = <36>;
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interrupt-parent = <&PIC>;
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};
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e) Marvell Discovery BRG nodes
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Represent baud rate generator hardware associated with the MPSC
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(multiprotocol serial controllers).
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Required properties:
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- compatible : "marvell,mv64360-brg"
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- reg : Offset and length of the register set for this device
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- clock-src : A value from 0 to 15 which selects the clock
|
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source for the baud rate generator. This value corresponds
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to the CLKS value in the BRGx configuration register. See
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the mv64x60 User's Manual.
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- clock-frequence : The frequency (in Hz) of the baud rate
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generator's input clock.
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- current-speed : The current speed setting (presumably by
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firmware) of the baud rate generator.
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Example Discovery BRG node:
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brg@b200 {
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compatible = "marvell,mv64360-brg";
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reg = <0xb200 0x8>;
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clock-src = <8>;
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clock-frequency = <133333333>;
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current-speed = <9600>;
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};
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f) Marvell Discovery CUNIT nodes
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Represent the Serial Communications Unit device hardware.
|
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Required properties:
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- reg : Offset and length of the register set for this device
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Example Discovery CUNIT node:
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cunit@f200 {
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reg = <0xf200 0x200>;
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};
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g) Marvell Discovery MPSCROUTING nodes
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Represent the Discovery's MPSC routing hardware
|
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Required properties:
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- reg : Offset and length of the register set for this device
|
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Example Discovery CUNIT node:
|
||||
mpscrouting@b500 {
|
||||
reg = <0xb400 0xc>;
|
||||
};
|
||||
|
||||
|
||||
h) Marvell Discovery MPSCINTR nodes
|
||||
|
||||
Represent the Discovery's MPSC DMA interrupt hardware registers
|
||||
(SDMA cause and mask registers).
|
||||
|
||||
Required properties:
|
||||
- reg : Offset and length of the register set for this device
|
||||
|
||||
Example Discovery MPSCINTR node:
|
||||
mpsintr@b800 {
|
||||
reg = <0xb800 0x100>;
|
||||
};
|
||||
|
||||
|
||||
i) Marvell Discovery MPSC nodes
|
||||
|
||||
Represent the Discovery's MPSC (Multiprotocol Serial Controller)
|
||||
serial port.
|
||||
|
||||
Required properties:
|
||||
- device_type : "serial"
|
||||
- compatible : "marvell,mv64360-mpsc"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- sdma : the phandle for the SDMA node used by this port
|
||||
- brg : the phandle for the BRG node used by this port
|
||||
- cunit : the phandle for the CUNIT node used by this port
|
||||
- mpscrouting : the phandle for the MPSCROUTING node used by this port
|
||||
- mpscintr : the phandle for the MPSCINTR node used by this port
|
||||
- cell-index : the hardware index of this cell in the MPSC core
|
||||
- max_idle : value needed for MPSC CHR3 (Maximum Frame Length)
|
||||
register
|
||||
- interrupts : <a> where a is the interrupt number for the MPSC.
|
||||
- interrupt-parent : the phandle for the interrupt controller
|
||||
that services interrupts for this device.
|
||||
|
||||
Example Discovery MPSCINTR node:
|
||||
mpsc@8000 {
|
||||
device_type = "serial";
|
||||
compatible = "marvell,mv64360-mpsc";
|
||||
reg = <0x8000 0x38>;
|
||||
virtual-reg = <0xf1008000>;
|
||||
sdma = <&SDMA0>;
|
||||
brg = <&BRG0>;
|
||||
cunit = <&CUNIT>;
|
||||
mpscrouting = <&MPSCROUTING>;
|
||||
mpscintr = <&MPSCINTR>;
|
||||
cell-index = <0>;
|
||||
max_idle = <40>;
|
||||
interrupts = <40>;
|
||||
interrupt-parent = <&PIC>;
|
||||
};
|
||||
|
||||
|
||||
j) Marvell Discovery Watch Dog Timer nodes
|
||||
|
||||
Represent the Discovery's watchdog timer hardware
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-wdt"
|
||||
- reg : Offset and length of the register set for this device
|
||||
|
||||
Example Discovery Watch Dog Timer node:
|
||||
wdt@b410 {
|
||||
compatible = "marvell,mv64360-wdt";
|
||||
reg = <0xb410 0x8>;
|
||||
};
|
||||
|
||||
|
||||
k) Marvell Discovery I2C nodes
|
||||
|
||||
Represent the Discovery's I2C hardware
|
||||
|
||||
Required properties:
|
||||
- device_type : "i2c"
|
||||
- compatible : "marvell,mv64360-i2c"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- interrupts : <a> where a is the interrupt number for the I2C.
|
||||
- interrupt-parent : the phandle for the interrupt controller
|
||||
that services interrupts for this device.
|
||||
|
||||
Example Discovery I2C node:
|
||||
compatible = "marvell,mv64360-i2c";
|
||||
reg = <0xc000 0x20>;
|
||||
virtual-reg = <0xf100c000>;
|
||||
interrupts = <37>;
|
||||
interrupt-parent = <&PIC>;
|
||||
};
|
||||
|
||||
|
||||
l) Marvell Discovery PIC (Programmable Interrupt Controller) nodes
|
||||
|
||||
Represent the Discovery's PIC hardware
|
||||
|
||||
Required properties:
|
||||
- #interrupt-cells : <1>
|
||||
- #address-cells : <0>
|
||||
- compatible : "marvell,mv64360-pic"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- interrupt-controller
|
||||
|
||||
Example Discovery PIC node:
|
||||
pic {
|
||||
#interrupt-cells = <1>;
|
||||
#address-cells = <0>;
|
||||
compatible = "marvell,mv64360-pic";
|
||||
reg = <0x0 0x88>;
|
||||
interrupt-controller;
|
||||
};
|
||||
|
||||
|
||||
m) Marvell Discovery MPP (Multipurpose Pins) multiplexing nodes
|
||||
|
||||
Represent the Discovery's MPP hardware
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-mpp"
|
||||
- reg : Offset and length of the register set for this device
|
||||
|
||||
Example Discovery MPP node:
|
||||
mpp@f000 {
|
||||
compatible = "marvell,mv64360-mpp";
|
||||
reg = <0xf000 0x10>;
|
||||
};
|
||||
|
||||
|
||||
n) Marvell Discovery GPP (General Purpose Pins) nodes
|
||||
|
||||
Represent the Discovery's GPP hardware
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-gpp"
|
||||
- reg : Offset and length of the register set for this device
|
||||
|
||||
Example Discovery GPP node:
|
||||
gpp@f000 {
|
||||
compatible = "marvell,mv64360-gpp";
|
||||
reg = <0xf100 0x20>;
|
||||
};
|
||||
|
||||
|
||||
o) Marvell Discovery PCI host bridge node
|
||||
|
||||
Represents the Discovery's PCI host bridge device. The properties
|
||||
for this node conform to Rev 2.1 of the PCI Bus Binding to IEEE
|
||||
1275-1994. A typical value for the compatible property is
|
||||
"marvell,mv64360-pci".
|
||||
|
||||
Example Discovery PCI host bridge node
|
||||
pci@80000000 {
|
||||
#address-cells = <3>;
|
||||
#size-cells = <2>;
|
||||
#interrupt-cells = <1>;
|
||||
device_type = "pci";
|
||||
compatible = "marvell,mv64360-pci";
|
||||
reg = <0xcf8 0x8>;
|
||||
ranges = <0x01000000 0x0 0x0
|
||||
0x88000000 0x0 0x01000000
|
||||
0x02000000 0x0 0x80000000
|
||||
0x80000000 0x0 0x08000000>;
|
||||
bus-range = <0 255>;
|
||||
clock-frequency = <66000000>;
|
||||
interrupt-parent = <&PIC>;
|
||||
interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
|
||||
interrupt-map = <
|
||||
/* IDSEL 0x0a */
|
||||
0x5000 0 0 1 &PIC 80
|
||||
0x5000 0 0 2 &PIC 81
|
||||
0x5000 0 0 3 &PIC 91
|
||||
0x5000 0 0 4 &PIC 93
|
||||
|
||||
/* IDSEL 0x0b */
|
||||
0x5800 0 0 1 &PIC 91
|
||||
0x5800 0 0 2 &PIC 93
|
||||
0x5800 0 0 3 &PIC 80
|
||||
0x5800 0 0 4 &PIC 81
|
||||
|
||||
/* IDSEL 0x0c */
|
||||
0x6000 0 0 1 &PIC 91
|
||||
0x6000 0 0 2 &PIC 93
|
||||
0x6000 0 0 3 &PIC 80
|
||||
0x6000 0 0 4 &PIC 81
|
||||
|
||||
/* IDSEL 0x0d */
|
||||
0x6800 0 0 1 &PIC 93
|
||||
0x6800 0 0 2 &PIC 80
|
||||
0x6800 0 0 3 &PIC 81
|
||||
0x6800 0 0 4 &PIC 91
|
||||
>;
|
||||
};
|
||||
|
||||
|
||||
p) Marvell Discovery CPU Error nodes
|
||||
|
||||
Represent the Discovery's CPU error handler device.
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-cpu-error"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- interrupts : the interrupt number for this device
|
||||
- interrupt-parent : the phandle for the interrupt controller
|
||||
that services interrupts for this device.
|
||||
|
||||
Example Discovery CPU Error node:
|
||||
cpu-error@0070 {
|
||||
compatible = "marvell,mv64360-cpu-error";
|
||||
reg = <0x70 0x10 0x128 0x28>;
|
||||
interrupts = <3>;
|
||||
interrupt-parent = <&PIC>;
|
||||
};
|
||||
|
||||
|
||||
q) Marvell Discovery SRAM Controller nodes
|
||||
|
||||
Represent the Discovery's SRAM controller device.
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-sram-ctrl"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- interrupts : the interrupt number for this device
|
||||
- interrupt-parent : the phandle for the interrupt controller
|
||||
that services interrupts for this device.
|
||||
|
||||
Example Discovery SRAM Controller node:
|
||||
sram-ctrl@0380 {
|
||||
compatible = "marvell,mv64360-sram-ctrl";
|
||||
reg = <0x380 0x80>;
|
||||
interrupts = <13>;
|
||||
interrupt-parent = <&PIC>;
|
||||
};
|
||||
|
||||
|
||||
r) Marvell Discovery PCI Error Handler nodes
|
||||
|
||||
Represent the Discovery's PCI error handler device.
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-pci-error"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- interrupts : the interrupt number for this device
|
||||
- interrupt-parent : the phandle for the interrupt controller
|
||||
that services interrupts for this device.
|
||||
|
||||
Example Discovery PCI Error Handler node:
|
||||
pci-error@1d40 {
|
||||
compatible = "marvell,mv64360-pci-error";
|
||||
reg = <0x1d40 0x40 0xc28 0x4>;
|
||||
interrupts = <12>;
|
||||
interrupt-parent = <&PIC>;
|
||||
};
|
||||
|
||||
|
||||
s) Marvell Discovery Memory Controller nodes
|
||||
|
||||
Represent the Discovery's memory controller device.
|
||||
|
||||
Required properties:
|
||||
- compatible : "marvell,mv64360-mem-ctrl"
|
||||
- reg : Offset and length of the register set for this device
|
||||
- interrupts : the interrupt number for this device
|
||||
- interrupt-parent : the phandle for the interrupt controller
|
||||
that services interrupts for this device.
|
||||
|
||||
Example Discovery Memory Controller node:
|
||||
mem-ctrl@1400 {
|
||||
compatible = "marvell,mv64360-mem-ctrl";
|
||||
reg = <0x1400 0x60>;
|
||||
interrupts = <17>;
|
||||
interrupt-parent = <&PIC>;
|
||||
};
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
PHY nodes
|
||||
|
||||
Required properties:
|
||||
|
||||
- device_type : Should be "ethernet-phy"
|
||||
- interrupts : <a b> where a is the interrupt number and b is a
|
||||
field that represents an encoding of the sense and level
|
||||
information for the interrupt. This should be encoded based on
|
||||
the information in section 2) depending on the type of interrupt
|
||||
controller you have.
|
||||
- interrupt-parent : the phandle for the interrupt controller that
|
||||
services interrupts for this device.
|
||||
- reg : The ID number for the phy, usually a small integer
|
||||
- linux,phandle : phandle for this node; likely referenced by an
|
||||
ethernet controller node.
|
||||
|
||||
Example:
|
||||
|
||||
ethernet-phy@0 {
|
||||
linux,phandle = <2452000>
|
||||
interrupt-parent = <40000>;
|
||||
interrupts = <35 1>;
|
||||
reg = <0>;
|
||||
device_type = "ethernet-phy";
|
||||
};
|
||||
|
|
@ -0,0 +1,57 @@
|
|||
SPI (Serial Peripheral Interface) busses
|
||||
|
||||
SPI busses can be described with a node for the SPI master device
|
||||
and a set of child nodes for each SPI slave on the bus. For this
|
||||
discussion, it is assumed that the system's SPI controller is in
|
||||
SPI master mode. This binding does not describe SPI controllers
|
||||
in slave mode.
|
||||
|
||||
The SPI master node requires the following properties:
|
||||
- #address-cells - number of cells required to define a chip select
|
||||
address on the SPI bus.
|
||||
- #size-cells - should be zero.
|
||||
- compatible - name of SPI bus controller following generic names
|
||||
recommended practice.
|
||||
No other properties are required in the SPI bus node. It is assumed
|
||||
that a driver for an SPI bus device will understand that it is an SPI bus.
|
||||
However, the binding does not attempt to define the specific method for
|
||||
assigning chip select numbers. Since SPI chip select configuration is
|
||||
flexible and non-standardized, it is left out of this binding with the
|
||||
assumption that board specific platform code will be used to manage
|
||||
chip selects. Individual drivers can define additional properties to
|
||||
support describing the chip select layout.
|
||||
|
||||
SPI slave nodes must be children of the SPI master node and can
|
||||
contain the following properties.
|
||||
- reg - (required) chip select address of device.
|
||||
- compatible - (required) name of SPI device following generic names
|
||||
recommended practice
|
||||
- spi-max-frequency - (required) Maximum SPI clocking speed of device in Hz
|
||||
- spi-cpol - (optional) Empty property indicating device requires
|
||||
inverse clock polarity (CPOL) mode
|
||||
- spi-cpha - (optional) Empty property indicating device requires
|
||||
shifted clock phase (CPHA) mode
|
||||
- spi-cs-high - (optional) Empty property indicating device requires
|
||||
chip select active high
|
||||
|
||||
SPI example for an MPC5200 SPI bus:
|
||||
spi@f00 {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <0>;
|
||||
compatible = "fsl,mpc5200b-spi","fsl,mpc5200-spi";
|
||||
reg = <0xf00 0x20>;
|
||||
interrupts = <2 13 0 2 14 0>;
|
||||
interrupt-parent = <&mpc5200_pic>;
|
||||
|
||||
ethernet-switch@0 {
|
||||
compatible = "micrel,ks8995m";
|
||||
spi-max-frequency = <1000000>;
|
||||
reg = <0>;
|
||||
};
|
||||
|
||||
codec@1 {
|
||||
compatible = "ti,tlv320aic26";
|
||||
spi-max-frequency = <100000>;
|
||||
reg = <1>;
|
||||
};
|
||||
};
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
USB EHCI controllers
|
||||
|
||||
Required properties:
|
||||
- compatible : should be "usb-ehci".
|
||||
- reg : should contain at least address and length of the standard EHCI
|
||||
register set for the device. Optional platform-dependent registers
|
||||
(debug-port or other) can be also specified here, but only after
|
||||
definition of standard EHCI registers.
|
||||
- interrupts : one EHCI interrupt should be described here.
|
||||
If device registers are implemented in big endian mode, the device
|
||||
node should have "big-endian-regs" property.
|
||||
If controller implementation operates with big endian descriptors,
|
||||
"big-endian-desc" property should be specified.
|
||||
If both big endian registers and descriptors are used by the controller
|
||||
implementation, "big-endian" property can be specified instead of having
|
||||
both "big-endian-regs" and "big-endian-desc".
|
||||
|
||||
Example (Sequoia 440EPx):
|
||||
ehci@e0000300 {
|
||||
compatible = "ibm,usb-ehci-440epx", "usb-ehci";
|
||||
interrupt-parent = <&UIC0>;
|
||||
interrupts = <1a 4>;
|
||||
reg = <0 e0000300 90 0 e0000390 70>;
|
||||
big-endian;
|
||||
};
|
||||
|
|
@ -0,0 +1,295 @@
|
|||
d) Xilinx IP cores
|
||||
|
||||
The Xilinx EDK toolchain ships with a set of IP cores (devices) for use
|
||||
in Xilinx Spartan and Virtex FPGAs. The devices cover the whole range
|
||||
of standard device types (network, serial, etc.) and miscellaneous
|
||||
devices (gpio, LCD, spi, etc). Also, since these devices are
|
||||
implemented within the fpga fabric every instance of the device can be
|
||||
synthesised with different options that change the behaviour.
|
||||
|
||||
Each IP-core has a set of parameters which the FPGA designer can use to
|
||||
control how the core is synthesized. Historically, the EDK tool would
|
||||
extract the device parameters relevant to device drivers and copy them
|
||||
into an 'xparameters.h' in the form of #define symbols. This tells the
|
||||
device drivers how the IP cores are configured, but it requres the kernel
|
||||
to be recompiled every time the FPGA bitstream is resynthesized.
|
||||
|
||||
The new approach is to export the parameters into the device tree and
|
||||
generate a new device tree each time the FPGA bitstream changes. The
|
||||
parameters which used to be exported as #defines will now become
|
||||
properties of the device node. In general, device nodes for IP-cores
|
||||
will take the following form:
|
||||
|
||||
(name): (generic-name)@(base-address) {
|
||||
compatible = "xlnx,(ip-core-name)-(HW_VER)"
|
||||
[, (list of compatible devices), ...];
|
||||
reg = <(baseaddr) (size)>;
|
||||
interrupt-parent = <&interrupt-controller-phandle>;
|
||||
interrupts = < ... >;
|
||||
xlnx,(parameter1) = "(string-value)";
|
||||
xlnx,(parameter2) = <(int-value)>;
|
||||
};
|
||||
|
||||
(generic-name): an open firmware-style name that describes the
|
||||
generic class of device. Preferably, this is one word, such
|
||||
as 'serial' or 'ethernet'.
|
||||
(ip-core-name): the name of the ip block (given after the BEGIN
|
||||
directive in system.mhs). Should be in lowercase
|
||||
and all underscores '_' converted to dashes '-'.
|
||||
(name): is derived from the "PARAMETER INSTANCE" value.
|
||||
(parameter#): C_* parameters from system.mhs. The C_ prefix is
|
||||
dropped from the parameter name, the name is converted
|
||||
to lowercase and all underscore '_' characters are
|
||||
converted to dashes '-'.
|
||||
(baseaddr): the baseaddr parameter value (often named C_BASEADDR).
|
||||
(HW_VER): from the HW_VER parameter.
|
||||
(size): the address range size (often C_HIGHADDR - C_BASEADDR + 1).
|
||||
|
||||
Typically, the compatible list will include the exact IP core version
|
||||
followed by an older IP core version which implements the same
|
||||
interface or any other device with the same interface.
|
||||
|
||||
'reg', 'interrupt-parent' and 'interrupts' are all optional properties.
|
||||
|
||||
For example, the following block from system.mhs:
|
||||
|
||||
BEGIN opb_uartlite
|
||||
PARAMETER INSTANCE = opb_uartlite_0
|
||||
PARAMETER HW_VER = 1.00.b
|
||||
PARAMETER C_BAUDRATE = 115200
|
||||
PARAMETER C_DATA_BITS = 8
|
||||
PARAMETER C_ODD_PARITY = 0
|
||||
PARAMETER C_USE_PARITY = 0
|
||||
PARAMETER C_CLK_FREQ = 50000000
|
||||
PARAMETER C_BASEADDR = 0xEC100000
|
||||
PARAMETER C_HIGHADDR = 0xEC10FFFF
|
||||
BUS_INTERFACE SOPB = opb_7
|
||||
PORT OPB_Clk = CLK_50MHz
|
||||
PORT Interrupt = opb_uartlite_0_Interrupt
|
||||
PORT RX = opb_uartlite_0_RX
|
||||
PORT TX = opb_uartlite_0_TX
|
||||
PORT OPB_Rst = sys_bus_reset_0
|
||||
END
|
||||
|
||||
becomes the following device tree node:
|
||||
|
||||
opb_uartlite_0: serial@ec100000 {
|
||||
device_type = "serial";
|
||||
compatible = "xlnx,opb-uartlite-1.00.b";
|
||||
reg = <ec100000 10000>;
|
||||
interrupt-parent = <&opb_intc_0>;
|
||||
interrupts = <1 0>; // got this from the opb_intc parameters
|
||||
current-speed = <d#115200>; // standard serial device prop
|
||||
clock-frequency = <d#50000000>; // standard serial device prop
|
||||
xlnx,data-bits = <8>;
|
||||
xlnx,odd-parity = <0>;
|
||||
xlnx,use-parity = <0>;
|
||||
};
|
||||
|
||||
Some IP cores actually implement 2 or more logical devices. In
|
||||
this case, the device should still describe the whole IP core with
|
||||
a single node and add a child node for each logical device. The
|
||||
ranges property can be used to translate from parent IP-core to the
|
||||
registers of each device. In addition, the parent node should be
|
||||
compatible with the bus type 'xlnx,compound', and should contain
|
||||
#address-cells and #size-cells, as with any other bus. (Note: this
|
||||
makes the assumption that both logical devices have the same bus
|
||||
binding. If this is not true, then separate nodes should be used
|
||||
for each logical device). The 'cell-index' property can be used to
|
||||
enumerate logical devices within an IP core. For example, the
|
||||
following is the system.mhs entry for the dual ps2 controller found
|
||||
on the ml403 reference design.
|
||||
|
||||
BEGIN opb_ps2_dual_ref
|
||||
PARAMETER INSTANCE = opb_ps2_dual_ref_0
|
||||
PARAMETER HW_VER = 1.00.a
|
||||
PARAMETER C_BASEADDR = 0xA9000000
|
||||
PARAMETER C_HIGHADDR = 0xA9001FFF
|
||||
BUS_INTERFACE SOPB = opb_v20_0
|
||||
PORT Sys_Intr1 = ps2_1_intr
|
||||
PORT Sys_Intr2 = ps2_2_intr
|
||||
PORT Clkin1 = ps2_clk_rx_1
|
||||
PORT Clkin2 = ps2_clk_rx_2
|
||||
PORT Clkpd1 = ps2_clk_tx_1
|
||||
PORT Clkpd2 = ps2_clk_tx_2
|
||||
PORT Rx1 = ps2_d_rx_1
|
||||
PORT Rx2 = ps2_d_rx_2
|
||||
PORT Txpd1 = ps2_d_tx_1
|
||||
PORT Txpd2 = ps2_d_tx_2
|
||||
END
|
||||
|
||||
It would result in the following device tree nodes:
|
||||
|
||||
opb_ps2_dual_ref_0: opb-ps2-dual-ref@a9000000 {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <1>;
|
||||
compatible = "xlnx,compound";
|
||||
ranges = <0 a9000000 2000>;
|
||||
// If this device had extra parameters, then they would
|
||||
// go here.
|
||||
ps2@0 {
|
||||
compatible = "xlnx,opb-ps2-dual-ref-1.00.a";
|
||||
reg = <0 40>;
|
||||
interrupt-parent = <&opb_intc_0>;
|
||||
interrupts = <3 0>;
|
||||
cell-index = <0>;
|
||||
};
|
||||
ps2@1000 {
|
||||
compatible = "xlnx,opb-ps2-dual-ref-1.00.a";
|
||||
reg = <1000 40>;
|
||||
interrupt-parent = <&opb_intc_0>;
|
||||
interrupts = <3 0>;
|
||||
cell-index = <0>;
|
||||
};
|
||||
};
|
||||
|
||||
Also, the system.mhs file defines bus attachments from the processor
|
||||
to the devices. The device tree structure should reflect the bus
|
||||
attachments. Again an example; this system.mhs fragment:
|
||||
|
||||
BEGIN ppc405_virtex4
|
||||
PARAMETER INSTANCE = ppc405_0
|
||||
PARAMETER HW_VER = 1.01.a
|
||||
BUS_INTERFACE DPLB = plb_v34_0
|
||||
BUS_INTERFACE IPLB = plb_v34_0
|
||||
END
|
||||
|
||||
BEGIN opb_intc
|
||||
PARAMETER INSTANCE = opb_intc_0
|
||||
PARAMETER HW_VER = 1.00.c
|
||||
PARAMETER C_BASEADDR = 0xD1000FC0
|
||||
PARAMETER C_HIGHADDR = 0xD1000FDF
|
||||
BUS_INTERFACE SOPB = opb_v20_0
|
||||
END
|
||||
|
||||
BEGIN opb_uart16550
|
||||
PARAMETER INSTANCE = opb_uart16550_0
|
||||
PARAMETER HW_VER = 1.00.d
|
||||
PARAMETER C_BASEADDR = 0xa0000000
|
||||
PARAMETER C_HIGHADDR = 0xa0001FFF
|
||||
BUS_INTERFACE SOPB = opb_v20_0
|
||||
END
|
||||
|
||||
BEGIN plb_v34
|
||||
PARAMETER INSTANCE = plb_v34_0
|
||||
PARAMETER HW_VER = 1.02.a
|
||||
END
|
||||
|
||||
BEGIN plb_bram_if_cntlr
|
||||
PARAMETER INSTANCE = plb_bram_if_cntlr_0
|
||||
PARAMETER HW_VER = 1.00.b
|
||||
PARAMETER C_BASEADDR = 0xFFFF0000
|
||||
PARAMETER C_HIGHADDR = 0xFFFFFFFF
|
||||
BUS_INTERFACE SPLB = plb_v34_0
|
||||
END
|
||||
|
||||
BEGIN plb2opb_bridge
|
||||
PARAMETER INSTANCE = plb2opb_bridge_0
|
||||
PARAMETER HW_VER = 1.01.a
|
||||
PARAMETER C_RNG0_BASEADDR = 0x20000000
|
||||
PARAMETER C_RNG0_HIGHADDR = 0x3FFFFFFF
|
||||
PARAMETER C_RNG1_BASEADDR = 0x60000000
|
||||
PARAMETER C_RNG1_HIGHADDR = 0x7FFFFFFF
|
||||
PARAMETER C_RNG2_BASEADDR = 0x80000000
|
||||
PARAMETER C_RNG2_HIGHADDR = 0xBFFFFFFF
|
||||
PARAMETER C_RNG3_BASEADDR = 0xC0000000
|
||||
PARAMETER C_RNG3_HIGHADDR = 0xDFFFFFFF
|
||||
BUS_INTERFACE SPLB = plb_v34_0
|
||||
BUS_INTERFACE MOPB = opb_v20_0
|
||||
END
|
||||
|
||||
Gives this device tree (some properties removed for clarity):
|
||||
|
||||
plb@0 {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <1>;
|
||||
compatible = "xlnx,plb-v34-1.02.a";
|
||||
device_type = "ibm,plb";
|
||||
ranges; // 1:1 translation
|
||||
|
||||
plb_bram_if_cntrl_0: bram@ffff0000 {
|
||||
reg = <ffff0000 10000>;
|
||||
}
|
||||
|
||||
opb@20000000 {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <1>;
|
||||
ranges = <20000000 20000000 20000000
|
||||
60000000 60000000 20000000
|
||||
80000000 80000000 40000000
|
||||
c0000000 c0000000 20000000>;
|
||||
|
||||
opb_uart16550_0: serial@a0000000 {
|
||||
reg = <a00000000 2000>;
|
||||
};
|
||||
|
||||
opb_intc_0: interrupt-controller@d1000fc0 {
|
||||
reg = <d1000fc0 20>;
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
That covers the general approach to binding xilinx IP cores into the
|
||||
device tree. The following are bindings for specific devices:
|
||||
|
||||
i) Xilinx ML300 Framebuffer
|
||||
|
||||
Simple framebuffer device from the ML300 reference design (also on the
|
||||
ML403 reference design as well as others).
|
||||
|
||||
Optional properties:
|
||||
- resolution = <xres yres> : pixel resolution of framebuffer. Some
|
||||
implementations use a different resolution.
|
||||
Default is <d#640 d#480>
|
||||
- virt-resolution = <xvirt yvirt> : Size of framebuffer in memory.
|
||||
Default is <d#1024 d#480>.
|
||||
- rotate-display (empty) : rotate display 180 degrees.
|
||||
|
||||
ii) Xilinx SystemACE
|
||||
|
||||
The Xilinx SystemACE device is used to program FPGAs from an FPGA
|
||||
bitstream stored on a CF card. It can also be used as a generic CF
|
||||
interface device.
|
||||
|
||||
Optional properties:
|
||||
- 8-bit (empty) : Set this property for SystemACE in 8 bit mode
|
||||
|
||||
iii) Xilinx EMAC and Xilinx TEMAC
|
||||
|
||||
Xilinx Ethernet devices. In addition to general xilinx properties
|
||||
listed above, nodes for these devices should include a phy-handle
|
||||
property, and may include other common network device properties
|
||||
like local-mac-address.
|
||||
|
||||
iv) Xilinx Uartlite
|
||||
|
||||
Xilinx uartlite devices are simple fixed speed serial ports.
|
||||
|
||||
Required properties:
|
||||
- current-speed : Baud rate of uartlite
|
||||
|
||||
v) Xilinx hwicap
|
||||
|
||||
Xilinx hwicap devices provide access to the configuration logic
|
||||
of the FPGA through the Internal Configuration Access Port
|
||||
(ICAP). The ICAP enables partial reconfiguration of the FPGA,
|
||||
readback of the configuration information, and some control over
|
||||
'warm boots' of the FPGA fabric.
|
||||
|
||||
Required properties:
|
||||
- xlnx,family : The family of the FPGA, necessary since the
|
||||
capabilities of the underlying ICAP hardware
|
||||
differ between different families. May be
|
||||
'virtex2p', 'virtex4', or 'virtex5'.
|
||||
|
||||
vi) Xilinx Uart 16550
|
||||
|
||||
Xilinx UART 16550 devices are very similar to the NS16550 but with
|
||||
different register spacing and an offset from the base address.
|
||||
|
||||
Required properties:
|
||||
- clock-frequency : Frequency of the clock input
|
||||
- reg-offset : A value of 3 is required
|
||||
- reg-shift : A value of 2 is required
|
||||
|
||||
|
||||
Reference in New Issue