summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/pci/mvebu-pci.txt
blob: 9556e2fedf6deb77a1b49579521b7744f7318d1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
* Marvell EBU PCIe interfaces

Mandatory properties:

- compatible: one of the following values:
    marvell,armada-370-pcie
    marvell,armada-xp-pcie
    marvell,kirkwood-pcie
- #address-cells, set to <3>
- #size-cells, set to <2>
- #interrupt-cells, set to <1>
- bus-range: PCI bus numbers covered
- device_type, set to "pci"
- ranges: ranges describing the MMIO registers to control the PCIe
  interfaces, and ranges describing the MBus windows needed to access
  the memory and I/O regions of each PCIe interface.

The ranges describing the MMIO registers have the following layout:

    0x82000000 0 r MBUS_ID(0xf0, 0x01) r 0 s

where:

  * r is a 32-bits value that gives the offset of the MMIO
  registers of this PCIe interface, from the base of the internal
  registers.

  * s is a 32-bits value that give the size of this MMIO
  registers area. This range entry translates the '0x82000000 0 r' PCI
  address into the 'MBUS_ID(0xf0, 0x01) r' CPU address, which is part
  of the internal register window (as identified by MBUS_ID(0xf0,
  0x01)).

The ranges describing the MBus windows have the following layout:

    0x8t000000 s 0     MBUS_ID(w, a) 0 1 0

where:

   * t is the type of the MBus window (as defined by the standard PCI DT
   bindings), 1 for I/O and 2 for memory.

   * s is the PCI slot that corresponds to this PCIe interface

   * w is the 'target ID' value for the MBus window

   * a the 'attribute' value for the MBus window.

Since the location and size of the different MBus windows is not fixed in
hardware, and only determined in runtime, those ranges cover the full first
4 GB of the physical address space, and do not translate into a valid CPU
address.

In addition, the device tree node must have sub-nodes describing each
PCIe interface, having the following mandatory properties:

- reg: used only for interrupt mapping, so only the first four bytes
  are used to refer to the correct bus number and device number.
- assigned-addresses: reference to the MMIO registers used to control
  this PCIe interface.
- clocks: the clock associated to this PCIe interface
- marvell,pcie-port: the physical PCIe port number
- status: either "disabled" or "okay"
- device_type, set to "pci"
- #address-cells, set to <3>
- #size-cells, set to <2>
- #interrupt-cells, set to <1>
- ranges, translating the MBus windows ranges of the parent node into
  standard PCI addresses.
- interrupt-map-mask and interrupt-map, standard PCI properties to
  define the mapping of the PCIe interface to interrupt numbers.

and the following optional properties:
- marvell,pcie-lane: the physical PCIe lane number, for ports having
  multiple lanes. If this property is not found, we assume that the
  value is 0.

Example:

pcie-controller {
	compatible = "marvell,armada-xp-pcie";
	status = "disabled";
	device_type = "pci";

	#address-cells = <3>;
	#size-cells = <2>;

	bus-range = <0x00 0xff>;

	ranges =
	       <0x82000000 0 0x40000 MBUS_ID(0xf0, 0x01) 0x40000 0 0x00002000	/* Port 0.0 registers */
		0x82000000 0 0x42000 MBUS_ID(0xf0, 0x01) 0x42000 0 0x00002000	/* Port 2.0 registers */
		0x82000000 0 0x44000 MBUS_ID(0xf0, 0x01) 0x44000 0 0x00002000	/* Port 0.1 registers */
		0x82000000 0 0x48000 MBUS_ID(0xf0, 0x01) 0x48000 0 0x00002000	/* Port 0.2 registers */
		0x82000000 0 0x4c000 MBUS_ID(0xf0, 0x01) 0x4c000 0 0x00002000	/* Port 0.3 registers */
		0x82000000 0 0x80000 MBUS_ID(0xf0, 0x01) 0x80000 0 0x00002000	/* Port 1.0 registers */
		0x82000000 0 0x82000 MBUS_ID(0xf0, 0x01) 0x82000 0 0x00002000	/* Port 3.0 registers */
		0x82000000 0 0x84000 MBUS_ID(0xf0, 0x01) 0x84000 0 0x00002000	/* Port 1.1 registers */
		0x82000000 0 0x88000 MBUS_ID(0xf0, 0x01) 0x88000 0 0x00002000	/* Port 1.2 registers */
		0x82000000 0 0x8c000 MBUS_ID(0xf0, 0x01) 0x8c000 0 0x00002000	/* Port 1.3 registers */
		0x82000000 0x1 0     MBUS_ID(0x04, 0xe8) 0 1 0 /* Port 0.0 MEM */
		0x81000000 0x1 0     MBUS_ID(0x04, 0xe0) 0 1 0 /* Port 0.0 IO  */
		0x82000000 0x2 0     MBUS_ID(0x04, 0xd8) 0 1 0 /* Port 0.1 MEM */
		0x81000000 0x2 0     MBUS_ID(0x04, 0xd0) 0 1 0 /* Port 0.1 IO  */
		0x82000000 0x3 0     MBUS_ID(0x04, 0xb8) 0 1 0 /* Port 0.2 MEM */
		0x81000000 0x3 0     MBUS_ID(0x04, 0xb0) 0 1 0 /* Port 0.2 IO  */
		0x82000000 0x4 0     MBUS_ID(0x04, 0x78) 0 1 0 /* Port 0.3 MEM */
		0x81000000 0x4 0     MBUS_ID(0x04, 0x70) 0 1 0 /* Port 0.3 IO  */

		0x82000000 0x5 0     MBUS_ID(0x08, 0xe8) 0 1 0 /* Port 1.0 MEM */
		0x81000000 0x5 0     MBUS_ID(0x08, 0xe0) 0 1 0 /* Port 1.0 IO  */
		0x82000000 0x6 0     MBUS_ID(0x08, 0xd8) 0 1 0 /* Port 1.1 MEM */
		0x81000000 0x6 0     MBUS_ID(0x08, 0xd0) 0 1 0 /* Port 1.1 IO  */
		0x82000000 0x7 0     MBUS_ID(0x08, 0xb8) 0 1 0 /* Port 1.2 MEM */
		0x81000000 0x7 0     MBUS_ID(0x08, 0xb0) 0 1 0 /* Port 1.2 IO  */
		0x82000000 0x8 0     MBUS_ID(0x08, 0x78) 0 1 0 /* Port 1.3 MEM */
		0x81000000 0x8 0     MBUS_ID(0x08, 0x70) 0 1 0 /* Port 1.3 IO  */

		0x82000000 0x9 0     MBUS_ID(0x04, 0xf8) 0 1 0 /* Port 2.0 MEM */
		0x81000000 0x9 0     MBUS_ID(0x04, 0xf0) 0 1 0 /* Port 2.0 IO  */

		0x82000000 0xa 0     MBUS_ID(0x08, 0xf8) 0 1 0 /* Port 3.0 MEM */
		0x81000000 0xa 0     MBUS_ID(0x08, 0xf0) 0 1 0 /* Port 3.0 IO  */>;

	pcie@1,0 {
		device_type = "pci";
		assigned-addresses = <0x82000800 0 0x40000 0 0x2000>;
		reg = <0x0800 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x1 0 1 0
			  0x81000000 0 0 0x81000000 0x1 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 58>;
		marvell,pcie-port = <0>;
		marvell,pcie-lane = <0>;
		clocks = <&gateclk 5>;
		status = "disabled";
	};

	pcie@2,0 {
		device_type = "pci";
		assigned-addresses = <0x82001000 0 0x44000 0 0x2000>;
		reg = <0x1000 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x2 0 1 0
			  0x81000000 0 0 0x81000000 0x2 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 59>;
		marvell,pcie-port = <0>;
		marvell,pcie-lane = <1>;
		clocks = <&gateclk 6>;
		status = "disabled";
	};

	pcie@3,0 {
		device_type = "pci";
		assigned-addresses = <0x82001800 0 0x48000 0 0x2000>;
		reg = <0x1800 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x3 0 1 0
			  0x81000000 0 0 0x81000000 0x3 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 60>;
		marvell,pcie-port = <0>;
		marvell,pcie-lane = <2>;
		clocks = <&gateclk 7>;
		status = "disabled";
	};

	pcie@4,0 {
		device_type = "pci";
		assigned-addresses = <0x82002000 0 0x4c000 0 0x2000>;
		reg = <0x2000 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x4 0 1 0
			  0x81000000 0 0 0x81000000 0x4 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 61>;
		marvell,pcie-port = <0>;
		marvell,pcie-lane = <3>;
		clocks = <&gateclk 8>;
		status = "disabled";
	};

	pcie@5,0 {
		device_type = "pci";
		assigned-addresses = <0x82002800 0 0x80000 0 0x2000>;
		reg = <0x2800 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x5 0 1 0
			  0x81000000 0 0 0x81000000 0x5 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 62>;
		marvell,pcie-port = <1>;
		marvell,pcie-lane = <0>;
		clocks = <&gateclk 9>;
		status = "disabled";
	};

	pcie@6,0 {
		device_type = "pci";
		assigned-addresses = <0x82003000 0 0x84000 0 0x2000>;
		reg = <0x3000 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x6 0 1 0
			  0x81000000 0 0 0x81000000 0x6 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 63>;
		marvell,pcie-port = <1>;
		marvell,pcie-lane = <1>;
		clocks = <&gateclk 10>;
		status = "disabled";
	};

	pcie@7,0 {
		device_type = "pci";
		assigned-addresses = <0x82003800 0 0x88000 0 0x2000>;
		reg = <0x3800 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x7 0 1 0
			  0x81000000 0 0 0x81000000 0x7 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 64>;
		marvell,pcie-port = <1>;
		marvell,pcie-lane = <2>;
		clocks = <&gateclk 11>;
		status = "disabled";
	};

	pcie@8,0 {
		device_type = "pci";
		assigned-addresses = <0x82004000 0 0x8c000 0 0x2000>;
		reg = <0x4000 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x8 0 1 0
			  0x81000000 0 0 0x81000000 0x8 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 65>;
		marvell,pcie-port = <1>;
		marvell,pcie-lane = <3>;
		clocks = <&gateclk 12>;
		status = "disabled";
	};

	pcie@9,0 {
		device_type = "pci";
		assigned-addresses = <0x82004800 0 0x42000 0 0x2000>;
		reg = <0x4800 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0x9 0 1 0
			  0x81000000 0 0 0x81000000 0x9 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 99>;
		marvell,pcie-port = <2>;
		marvell,pcie-lane = <0>;
		clocks = <&gateclk 26>;
		status = "disabled";
	};

	pcie@10,0 {
		device_type = "pci";
		assigned-addresses = <0x82005000 0 0x82000 0 0x2000>;
		reg = <0x5000 0 0 0 0>;
		#address-cells = <3>;
		#size-cells = <2>;
		#interrupt-cells = <1>;
		ranges = <0x82000000 0 0 0x82000000 0xa 0 1 0
			  0x81000000 0 0 0x81000000 0xa 0 1 0>;
		interrupt-map-mask = <0 0 0 0>;
		interrupt-map = <0 0 0 0 &mpic 103>;
		marvell,pcie-port = <3>;
		marvell,pcie-lane = <0>;
		clocks = <&gateclk 27>;
		status = "disabled";
	};
};
OpenPOWER on IntegriCloud