Documentation/devicetree/bindings/net/snps,dwmac.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/net/snps,dwmac.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Synopsys DesignWare MAC Device Tree Bindings
   8
   9 maintainers:
  10   - Alexandre Torgue <alexandre.torgue@st.com>
  11   - Giuseppe Cavallaro <peppe.cavallaro@st.com>
  12   - Jose Abreu <joabreu@synopsys.com>
  13
  14 # Select every compatible, including the deprecated ones. This way, we
  15 # will be able to report a warning when we have that compatible, since
  16 # we will validate the node thanks to the select, but won't report it
  17 # as a valid value in the compatible property description
  18 select:
  19   properties:
  20     compatible:
  21       contains:
  22         enum:
  23           - snps,dwmac
  24           - snps,dwmac-3.50a
  25           - snps,dwmac-3.610
  26           - snps,dwmac-3.70a
  27           - snps,dwmac-3.710
  28           - snps,dwmac-4.00
  29           - snps,dwmac-4.10a
  30           - snps,dwxgmac
  31           - snps,dwxgmac-2.10
  32
  33           # Deprecated
  34           - st,spear600-gmac
  35
  36   required:
  37     - compatible
  38
  39 properties:
  40
  41   # We need to include all the compatibles from schemas that will
  42   # include that schemas, otherwise compatible won't validate for
  43   # those.
  44   compatible:
  45     contains:
  46       enum:
  47         - allwinner,sun7i-a20-gmac
  48         - allwinner,sun8i-a83t-emac
  49         - allwinner,sun8i-h3-emac
  50         - allwinner,sun8i-r40-emac
  51         - allwinner,sun8i-v3s-emac
  52         - allwinner,sun50i-a64-emac
  53         - amlogic,meson6-dwmac
  54         - amlogic,meson8b-dwmac
  55         - amlogic,meson8m2-dwmac
  56         - amlogic,meson-gxbb-dwmac
  57         - amlogic,meson-axg-dwmac
  58         - snps,dwmac
  59         - snps,dwmac-3.50a
  60         - snps,dwmac-3.610
  61         - snps,dwmac-3.70a
  62         - snps,dwmac-3.710
  63         - snps,dwmac-4.00
  64         - snps,dwmac-4.10a
  65         - snps,dwxgmac
  66         - snps,dwxgmac-2.10
  67
  68   reg:
  69     minItems: 1
  70     maxItems: 2
  71
  72   interrupts:
  73     minItems: 1
  74     maxItems: 3
  75     items:
  76       - description: Combined signal for various interrupt events
  77       - description: The interrupt to manage the remote wake-up packet detection
  78       - description: The interrupt that occurs when Rx exits the LPI state
  79
  80   interrupt-names:
  81     minItems: 1
  82     maxItems: 3
  83     items:
  84       - const: macirq
  85       - const: eth_wake_irq
  86       - const: eth_lpi
  87
  88   clocks:
  89     minItems: 1
  90     maxItems: 3
  91     items:
  92       - description: GMAC main clock
  93       - description: Peripheral registers interface clock
  94       - description:
  95           PTP reference clock. This clock is used for programming the
  96           Timestamp Addend Register. If not passed then the system
  97           clock will be used and this is fine on some platforms.
  98
  99   clock-names:
 100     additionalItems: true
 101     contains:
 102       enum:
 103         - stmmaceth
 104         - pclk
 105         - ptp_ref
 106
 107   resets:
 108     maxItems: 1
 109     description:
 110       MAC Reset signal.
 111
 112   reset-names:
 113     const: stmmaceth
 114
 115   mac-mode:
 116     $ref: ethernet-controller.yaml#/properties/phy-connection-type
 117     description:
 118       The property is identical to 'phy-mode', and assumes that there is mode
 119       converter in-between the MAC & PHY (e.g. GMII-to-RGMII). This converter
 120       can be passive (no SW requirement), and requires that the MAC operate
 121       in a different mode than the PHY in order to function.
 122
 123   snps,axi-config:
 124     $ref: /schemas/types.yaml#definitions/phandle
 125     description:
 126       AXI BUS Mode parameters. Phandle to a node that can contain the
 127       following properties
 128         * snps,lpi_en, enable Low Power Interface
 129         * snps,xit_frm, unlock on WoL
 130         * snps,wr_osr_lmt, max write outstanding req. limit
 131         * snps,rd_osr_lmt, max read outstanding req. limit
 132         * snps,kbbe, do not cross 1KiB boundary.
 133         * snps,blen, this is a vector of supported burst length.
 134         * snps,fb, fixed-burst
 135         * snps,mb, mixed-burst
 136         * snps,rb, rebuild INCRx Burst
 137
 138   snps,mtl-rx-config:
 139     $ref: /schemas/types.yaml#definitions/phandle
 140     description:
 141       Multiple RX Queues parameters. Phandle to a node that can
 142       contain the following properties
 143         * snps,rx-queues-to-use, number of RX queues to be used in the
 144           driver
 145         * Choose one of these RX scheduling algorithms
 146           * snps,rx-sched-sp, Strict priority
 147           * snps,rx-sched-wsp, Weighted Strict priority
 148         * For each RX queue
 149           * Choose one of these modes
 150             * snps,dcb-algorithm, Queue to be enabled as DCB
 151             * snps,avb-algorithm, Queue to be enabled as AVB
 152           * snps,map-to-dma-channel, Channel to map
 153           * Specifiy specific packet routing
 154             * snps,route-avcp, AV Untagged Control packets
 155             * snps,route-ptp, PTP Packets
 156             * snps,route-dcbcp, DCB Control Packets
 157             * snps,route-up, Untagged Packets
 158             * snps,route-multi-broad, Multicast & Broadcast Packets
 159           * snps,priority, RX queue priority (Range 0x0 to 0xF)
 160
 161   snps,mtl-tx-config:
 162     $ref: /schemas/types.yaml#definitions/phandle
 163     description:
 164       Multiple TX Queues parameters. Phandle to a node that can
 165       contain the following properties
 166         * snps,tx-queues-to-use, number of TX queues to be used in the
 167           driver
 168         * Choose one of these TX scheduling algorithms
 169           * snps,tx-sched-wrr, Weighted Round Robin
 170           * snps,tx-sched-wfq, Weighted Fair Queuing
 171           * snps,tx-sched-dwrr, Deficit Weighted Round Robin
 172           * snps,tx-sched-sp, Strict priority
 173         * For each TX queue
 174           * snps,weight, TX queue weight (if using a DCB weight
 175             algorithm)
 176           * Choose one of these modes
 177             * snps,dcb-algorithm, TX queue will be working in DCB
 178             * snps,avb-algorithm, TX queue will be working in AVB
 179               [Attention] Queue 0 is reserved for legacy traffic
 180                           and so no AVB is available in this queue.
 181           * Configure Credit Base Shaper (if AVB Mode selected)
 182             * snps,send_slope, enable Low Power Interface
 183             * snps,idle_slope, unlock on WoL
 184             * snps,high_credit, max write outstanding req. limit
 185             * snps,low_credit, max read outstanding req. limit
 186           * snps,priority, TX queue priority (Range 0x0 to 0xF)
 187
 188   snps,reset-gpio:
 189     deprecated: true
 190     maxItems: 1
 191     description:
 192       PHY Reset GPIO
 193
 194   snps,reset-active-low:
 195     deprecated: true
 196     $ref: /schemas/types.yaml#definitions/flag
 197     description:
 198       Indicates that the PHY Reset is active low
 199
 200   snps,reset-delays-us:
 201     deprecated: true
 202     allOf:
 203       - $ref: /schemas/types.yaml#definitions/uint32-array
 204       - minItems: 3
 205         maxItems: 3
 206     description:
 207       Triplet of delays. The 1st cell is reset pre-delay in micro
 208       seconds. The 2nd cell is reset pulse in micro seconds. The 3rd
 209       cell is reset post-delay in micro seconds.
 210
 211   snps,aal:
 212     $ref: /schemas/types.yaml#definitions/flag
 213     description:
 214       Use Address-Aligned Beats
 215
 216   snps,fixed-burst:
 217     $ref: /schemas/types.yaml#definitions/flag
 218     description:
 219       Program the DMA to use the fixed burst mode
 220
 221   snps,mixed-burst:
 222     $ref: /schemas/types.yaml#definitions/flag
 223     description:
 224       Program the DMA to use the mixed burst mode
 225
 226   snps,force_thresh_dma_mode:
 227     $ref: /schemas/types.yaml#definitions/flag
 228     description:
 229       Force DMA to use the threshold mode for both tx and rx
 230
 231   snps,force_sf_dma_mode:
 232     $ref: /schemas/types.yaml#definitions/flag
 233     description:
 234       Force DMA to use the Store and Forward mode for both tx and
 235       rx. This flag is ignored if force_thresh_dma_mode is set.
 236
 237   snps,en-tx-lpi-clockgating:
 238     $ref: /schemas/types.yaml#definitions/flag
 239     description:
 240       Enable gating of the MAC TX clock during TX low-power mode
 241
 242   snps,multicast-filter-bins:
 243     $ref: /schemas/types.yaml#definitions/uint32
 244     description:
 245       Number of multicast filter hash bins supported by this device
 246       instance
 247
 248   snps,perfect-filter-entries:
 249     $ref: /schemas/types.yaml#definitions/uint32
 250     description:
 251       Number of perfect filter entries supported by this device
 252       instance
 253
 254   snps,ps-speed:
 255     $ref: /schemas/types.yaml#definitions/uint32
 256     description:
 257       Port selection speed that can be passed to the core when PCS
 258       is supported. For example, this is used in case of SGMII and
 259       MAC2MAC connection.
 260
 261   mdio:
 262     type: object
 263     description:
 264       Creates and registers an MDIO bus.
 265
 266     properties:
 267       compatible:
 268         const: snps,dwmac-mdio
 269
 270     required:
 271       - compatible
 272
 273 required:
 274   - compatible
 275   - reg
 276   - interrupts
 277   - interrupt-names
 278   - phy-mode
 279
 280 dependencies:
 281   snps,reset-active-low: ["snps,reset-gpio"]
 282   snps,reset-delay-us: ["snps,reset-gpio"]
 283
 284 allOf:
 285   - $ref: "ethernet-controller.yaml#"
 286   - if:
 287       properties:
 288         compatible:
 289           contains:
 290             enum:
 291               - allwinner,sun7i-a20-gmac
 292               - allwinner,sun8i-a83t-emac
 293               - allwinner,sun8i-h3-emac
 294               - allwinner,sun8i-r40-emac
 295               - allwinner,sun8i-v3s-emac
 296               - allwinner,sun50i-a64-emac
 297               - snps,dwxgmac
 298               - snps,dwxgmac-2.10
 299               - st,spear600-gmac
 300
 301     then:
 302       properties:
 303         snps,pbl:
 304           allOf:
 305             - $ref: /schemas/types.yaml#definitions/uint32
 306             - enum: [2, 4, 8]
 307           description:
 308             Programmable Burst Length (tx and rx)
 309
 310         snps,txpbl:
 311           allOf:
 312             - $ref: /schemas/types.yaml#definitions/uint32
 313             - enum: [2, 4, 8]
 314           description:
 315             Tx Programmable Burst Length. If set, DMA tx will use this
 316             value rather than snps,pbl.
 317
 318         snps,rxpbl:
 319           allOf:
 320             - $ref: /schemas/types.yaml#definitions/uint32
 321             - enum: [2, 4, 8]
 322           description:
 323             Rx Programmable Burst Length. If set, DMA rx will use this
 324             value rather than snps,pbl.
 325
 326         snps,no-pbl-x8:
 327           $ref: /schemas/types.yaml#definitions/flag
 328           description:
 329             Don\'t multiply the pbl/txpbl/rxpbl values by 8. For core
 330             rev < 3.50, don\'t multiply the values by 4.
 331
 332   - if:
 333       properties:
 334         compatible:
 335           contains:
 336             enum:
 337               - allwinner,sun7i-a20-gmac
 338               - allwinner,sun8i-a83t-emac
 339               - allwinner,sun8i-h3-emac
 340               - allwinner,sun8i-r40-emac
 341               - allwinner,sun8i-v3s-emac
 342               - allwinner,sun50i-a64-emac
 343               - snps,dwmac-4.00
 344               - snps,dwmac-4.10a
 345               - snps,dwxgmac
 346               - snps,dwxgmac-2.10
 347               - st,spear600-gmac
 348
 349     then:
 350         snps,tso:
 351           $ref: /schemas/types.yaml#definitions/flag
 352           description:
 353             Enables the TSO feature otherwise it will be managed by
 354             MAC HW capability register.
 355
 356 examples:
 357   - |
 358     stmmac_axi_setup: stmmac-axi-config {
 359         snps,wr_osr_lmt = <0xf>;
 360         snps,rd_osr_lmt = <0xf>;
 361         snps,blen = <256 128 64 32 0 0 0>;
 362     };
 363
 364     mtl_rx_setup: rx-queues-config {
 365         snps,rx-queues-to-use = <1>;
 366         snps,rx-sched-sp;
 367         queue0 {
 368             snps,dcb-algorithm;
 369             snps,map-to-dma-channel = <0x0>;
 370             snps,priority = <0x0>;
 371         };
 372     };
 373
 374     mtl_tx_setup: tx-queues-config {
 375         snps,tx-queues-to-use = <2>;
 376         snps,tx-sched-wrr;
 377         queue0 {
 378             snps,weight = <0x10>;
 379             snps,dcb-algorithm;
 380             snps,priority = <0x0>;
 381         };
 382
 383         queue1 {
 384             snps,avb-algorithm;
 385             snps,send_slope = <0x1000>;
 386             snps,idle_slope = <0x1000>;
 387             snps,high_credit = <0x3E800>;
 388             snps,low_credit = <0xFFC18000>;
 389             snps,priority = <0x1>;
 390         };
 391     };
 392
 393     gmac0: ethernet@e0800000 {
 394         compatible = "snps,dwxgmac-2.10", "snps,dwxgmac";
 395         reg = <0xe0800000 0x8000>;
 396         interrupt-parent = <&vic1>;
 397         interrupts = <24 23 22>;
 398         interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
 399         mac-address = [000000000000]; /* Filled in by U-Boot */
 400         max-frame-size = <3800>;
 401         phy-mode = "gmii";
 402         snps,multicast-filter-bins = <256>;
 403         snps,perfect-filter-entries = <128>;
 404         rx-fifo-depth = <16384>;
 405         tx-fifo-depth = <16384>;
 406         clocks = <&clock>;
 407         clock-names = "stmmaceth";
 408         snps,axi-config = <&stmmac_axi_setup>;
 409         snps,mtl-rx-config = <&mtl_rx_setup>;
 410         snps,mtl-tx-config = <&mtl_tx_setup>;
 411         mdio0 {
 412             #address-cells = <1>;
 413             #size-cells = <0>;
 414             compatible = "snps,dwmac-mdio";
 415             phy1: ethernet-phy@0 {
 416                 reg = <0>;
 417             };
 418         };
 419     };
 420
 421 # FIXME: We should set it, but it would report all the generic
 422 # properties as additional properties.
 423 # additionalProperties: false
 424
 425 ...