180 lines
7.3 KiB
Plaintext
180 lines
7.3 KiB
Plaintext
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* STMicroelectronics 10/100/1000 Ethernet driver (GMAC)
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Required properties:
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- compatible: Should be "snps,dwmac-<ip_version>", "snps,dwmac"
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For backwards compatibility: "st,spear600-gmac" is also supported.
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- reg: Address and length of the register set for the device
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- interrupt-parent: Should be the phandle for the interrupt controller
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that services interrupts for this device
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- interrupts: Should contain the STMMAC interrupts
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- interrupt-names: Should contain a list of interrupt names corresponding to
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the interrupts in the interrupts property, if available.
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Valid interrupt names are:
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- "macirq" (combined signal for various interrupt events)
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- "eth_wake_irq" (the interrupt to manage the remote wake-up packet detection)
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- "eth_lpi" (the interrupt that occurs when Rx exits the LPI state)
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- phy-mode: See ethernet.txt file in the same directory.
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- snps,reset-gpio gpio number for phy reset.
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- snps,reset-active-low boolean flag to indicate if phy reset is active low.
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- snps,reset-delays-us is triplet of delays
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The 1st cell is reset pre-delay in micro seconds.
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The 2nd cell is reset pulse in micro seconds.
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The 3rd cell is reset post-delay in micro seconds.
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Optional properties:
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- resets: Should contain a phandle to the STMMAC reset signal, if any
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- reset-names: Should contain the reset signal name "stmmaceth", if a
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reset phandle is given
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- max-frame-size: See ethernet.txt file in the same directory
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- clocks: If present, the first clock should be the GMAC main clock and
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the second clock should be peripheral's register interface clock. Further
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clocks may be specified in derived bindings.
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- clock-names: One name for each entry in the clocks property, the
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first one should be "stmmaceth" and the second one should be "pclk".
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- ptp_ref: this is the PTP reference clock; in case of the PTP is available
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this clock is used for programming the Timestamp Addend Register. If not
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passed then the system clock will be used and this is fine on some
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platforms.
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- tx-fifo-depth: See ethernet.txt file in the same directory
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- rx-fifo-depth: See ethernet.txt file in the same directory
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- snps,pbl Programmable Burst Length (tx and rx)
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- snps,txpbl Tx Programmable Burst Length. Only for GMAC and newer.
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If set, DMA tx will use this value rather than snps,pbl.
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- snps,rxpbl Rx Programmable Burst Length. Only for GMAC and newer.
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If set, DMA rx will use this value rather than snps,pbl.
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- snps,no-pbl-x8 Don't multiply the pbl/txpbl/rxpbl values by 8.
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For core rev < 3.50, don't multiply the values by 4.
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- snps,aal Address-Aligned Beats
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- snps,fixed-burst Program the DMA to use the fixed burst mode
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- snps,mixed-burst Program the DMA to use the mixed burst mode
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- snps,force_thresh_dma_mode Force DMA to use the threshold mode for
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both tx and rx
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- snps,force_sf_dma_mode Force DMA to use the Store and Forward
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mode for both tx and rx. This flag is
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ignored if force_thresh_dma_mode is set.
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- snps,en-tx-lpi-clockgating Enable gating of the MAC TX clock during
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TX low-power mode
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- snps,multicast-filter-bins: Number of multicast filter hash bins
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supported by this device instance
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- snps,perfect-filter-entries: Number of perfect filter entries supported
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by this device instance
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- snps,ps-speed: port selection speed that can be passed to the core when
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PCS is supported. For example, this is used in case of SGMII
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and MAC2MAC connection.
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- snps,tso: this enables the TSO feature otherwise it will be managed by
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MAC HW capability register. Only for GMAC4 and newer.
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- AXI BUS Mode parameters: below the list of all the parameters to program the
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AXI register inside the DMA module:
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- snps,lpi_en: enable Low Power Interface
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- snps,xit_frm: unlock on WoL
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- snps,wr_osr_lmt: max write outstanding req. limit
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- snps,rd_osr_lmt: max read outstanding req. limit
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- snps,kbbe: do not cross 1KiB boundary.
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- snps,blen: this is a vector of supported burst length.
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- snps,fb: fixed-burst
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- snps,mb: mixed-burst
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- snps,rb: rebuild INCRx Burst
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- mdio: with compatible = "snps,dwmac-mdio", create and register mdio bus.
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- Multiple RX Queues parameters: below the list of all the parameters to
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configure the multiple RX queues:
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- snps,rx-queues-to-use: number of RX queues to be used in the driver
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- Choose one of these RX scheduling algorithms:
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- snps,rx-sched-sp: Strict priority
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- snps,rx-sched-wsp: Weighted Strict priority
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- For each RX queue
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- Choose one of these modes:
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- snps,dcb-algorithm: Queue to be enabled as DCB
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- snps,avb-algorithm: Queue to be enabled as AVB
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- snps,map-to-dma-channel: Channel to map
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- Specifiy specific packet routing:
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- snps,route-avcp: AV Untagged Control packets
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- snps,route-ptp: PTP Packets
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- snps,route-dcbcp: DCB Control Packets
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- snps,route-up: Untagged Packets
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- snps,route-multi-broad: Multicast & Broadcast Packets
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- snps,priority: RX queue priority (Range: 0x0 to 0xF)
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- Multiple TX Queues parameters: below the list of all the parameters to
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configure the multiple TX queues:
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- snps,tx-queues-to-use: number of TX queues to be used in the driver
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- Choose one of these TX scheduling algorithms:
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- snps,tx-sched-wrr: Weighted Round Robin
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- snps,tx-sched-wfq: Weighted Fair Queuing
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- snps,tx-sched-dwrr: Deficit Weighted Round Robin
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- snps,tx-sched-sp: Strict priority
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- For each TX queue
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- snps,weight: TX queue weight (if using a DCB weight algorithm)
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- Choose one of these modes:
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- snps,dcb-algorithm: TX queue will be working in DCB
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- snps,avb-algorithm: TX queue will be working in AVB
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[Attention] Queue 0 is reserved for legacy traffic
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and so no AVB is available in this queue.
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- Configure Credit Base Shaper (if AVB Mode selected):
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- snps,send_slope: enable Low Power Interface
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- snps,idle_slope: unlock on WoL
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- snps,high_credit: max write outstanding req. limit
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- snps,low_credit: max read outstanding req. limit
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- snps,priority: TX queue priority (Range: 0x0 to 0xF)
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Examples:
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stmmac_axi_setup: stmmac-axi-config {
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snps,wr_osr_lmt = <0xf>;
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snps,rd_osr_lmt = <0xf>;
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snps,blen = <256 128 64 32 0 0 0>;
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};
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mtl_rx_setup: rx-queues-config {
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snps,rx-queues-to-use = <1>;
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snps,rx-sched-sp;
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queue0 {
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snps,dcb-algorithm;
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snps,map-to-dma-channel = <0x0>;
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snps,priority = <0x0>;
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};
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};
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mtl_tx_setup: tx-queues-config {
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snps,tx-queues-to-use = <2>;
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snps,tx-sched-wrr;
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queue0 {
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snps,weight = <0x10>;
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snps,dcb-algorithm;
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snps,priority = <0x0>;
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};
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queue1 {
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snps,avb-algorithm;
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snps,send_slope = <0x1000>;
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snps,idle_slope = <0x1000>;
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snps,high_credit = <0x3E800>;
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snps,low_credit = <0xFFC18000>;
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snps,priority = <0x1>;
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};
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};
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gmac0: ethernet@e0800000 {
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compatible = "st,spear600-gmac";
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reg = <0xe0800000 0x8000>;
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interrupt-parent = <&vic1>;
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interrupts = <24 23 22>;
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interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
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mac-address = [000000000000]; /* Filled in by U-Boot */
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max-frame-size = <3800>;
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phy-mode = "gmii";
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snps,multicast-filter-bins = <256>;
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snps,perfect-filter-entries = <128>;
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rx-fifo-depth = <16384>;
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tx-fifo-depth = <16384>;
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clocks = <&clock>;
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clock-names = "stmmaceth";
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snps,axi-config = <&stmmac_axi_setup>;
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mdio0 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "snps,dwmac-mdio";
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phy1: ethernet-phy@0 {
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};
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};
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snps,mtl-rx-config = <&mtl_rx_setup>;
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snps,mtl-tx-config = <&mtl_tx_setup>;
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};
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