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
7title: Synopsys DesignWare MAC Device Tree Bindings
8
9maintainers:
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
18select:
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
39properties:
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
273required:
274  - compatible
275  - reg
276  - interrupts
277  - interrupt-names
278  - phy-mode
279
280dependencies:
281  snps,reset-active-low: ["snps,reset-gpio"]
282  snps,reset-delay-us: ["snps,reset-gpio"]
283
284allOf:
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
356examples:
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...
426