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
|
Texas Instruments eDMA
The eDMA3 consists of two components: Channel controller (CC) and Transfer
Controller(s) (TC). The CC is the main entry for DMA users since it is
responsible for the DMA channel handling, while the TCs are responsible to
execute the actual DMA tansfer.
------------------------------------------------------------------------------
eDMA3 Channel Controller
Required properties:
--------------------
- compatible: Should be:
- "ti,edma3-tpcc" for the channel controller(s) on OMAP,
AM33xx and AM43xx SoCs.
- "ti,k2g-edma3-tpcc", "ti,edma3-tpcc" for the
channel controller(s) on 66AK2G.
- #dma-cells: Should be set to <2>. The first number is the DMA request
number and the second is the TC the channel is serviced on.
- reg: Memory map of eDMA CC
- reg-names: "edma3_cc"
- interrupts: Interrupt lines for CCINT, MPERR and CCERRINT.
- interrupt-names: "edma3_ccint", "edma3_mperr" and "edma3_ccerrint"
- ti,tptcs: List of TPTCs associated with the eDMA in the following form:
<&tptc_phandle TC_priority_number>. The highest priority is 0.
SoC-specific Required properties:
--------------------------------
The following are mandatory properties for OMAP, AM33xx and AM43xx SoCs only:
- ti,hwmods: Name of the hwmods associated to the eDMA CC.
The following are mandatory properties for 66AK2G SoCs only:
- power-domains:Should contain a phandle to a PM domain provider node
and an args specifier containing the device id
value. This property is as per the binding,
Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
Optional properties:
-------------------
- ti,edma-memcpy-channels: List of channels allocated to be used for memcpy, iow
these channels will be SW triggered channels. See example.
- ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
the driver, they are allocated to be used by for example the
DSP. See example.
- dma-channel-mask: Mask of usable channels.
Single uint32 for EDMA with 32 channels, array of two uint32 for
EDMA with 64 channels. See example and
Documentation/devicetree/bindings/dma/dma-common.yaml
------------------------------------------------------------------------------
eDMA3 Transfer Controller
Required properties:
--------------------
- compatible: Should be:
- "ti,edma3-tptc" for the transfer controller(s) on OMAP,
AM33xx and AM43xx SoCs.
- "ti,k2g-edma3-tptc", "ti,edma3-tptc" for the
transfer controller(s) on 66AK2G.
- reg: Memory map of eDMA TC
- interrupts: Interrupt number for TCerrint.
SoC-specific Required properties:
--------------------------------
The following are mandatory properties for OMAP, AM33xx and AM43xx SoCs only:
- ti,hwmods: Name of the hwmods associated to the eDMA TC.
The following are mandatory properties for 66AK2G SoCs only:
- power-domains:Should contain a phandle to a PM domain provider node
and an args specifier containing the device id
value. This property is as per the binding,
Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
Optional properties:
-------------------
- interrupt-names: "edma3_tcerrint"
------------------------------------------------------------------------------
Examples:
1.
edma: edma@49000000 {
compatible = "ti,edma3-tpcc";
ti,hwmods = "tpcc";
reg = <0x49000000 0x10000>;
reg-names = "edma3_cc";
interrupts = <12 13 14>;
interrupt-names = "edma3_ccint", "edma3_mperr", "edma3_ccerrint";
dma-requests = <64>;
#dma-cells = <2>;
ti,tptcs = <&edma_tptc0 7>, <&edma_tptc1 7>, <&edma_tptc2 0>;
/* Channel 20 and 21 is allocated for memcpy */
ti,edma-memcpy-channels = <20 21>;
/* The following PaRAM slots are reserved: 35-44 and 100-109 */
ti,edma-reserved-slot-ranges = <35 10>, <100 10>;
/* The following channels are reserved: 35-44 */
dma-channel-mask = <0xffffffff /* Channel 0-31 */
0xffffe007>; /* Channel 32-63 */
};
edma_tptc0: tptc@49800000 {
compatible = "ti,edma3-tptc";
ti,hwmods = "tptc0";
reg = <0x49800000 0x100000>;
interrupts = <112>;
interrupt-names = "edm3_tcerrint";
};
edma_tptc1: tptc@49900000 {
compatible = "ti,edma3-tptc";
ti,hwmods = "tptc1";
reg = <0x49900000 0x100000>;
interrupts = <113>;
interrupt-names = "edm3_tcerrint";
};
edma_tptc2: tptc@49a00000 {
compatible = "ti,edma3-tptc";
ti,hwmods = "tptc2";
reg = <0x49a00000 0x100000>;
interrupts = <114>;
interrupt-names = "edm3_tcerrint";
};
sham: sham@53100000 {
compatible = "ti,omap4-sham";
ti,hwmods = "sham";
reg = <0x53100000 0x200>;
interrupts = <109>;
/* DMA channel 36 executed on eDMA TC0 - low priority queue */
dmas = <&edma 36 0>;
dma-names = "rx";
};
mcasp0: mcasp@48038000 {
compatible = "ti,am33xx-mcasp-audio";
ti,hwmods = "mcasp0";
reg = <0x48038000 0x2000>,
<0x46000000 0x400000>;
reg-names = "mpu", "dat";
interrupts = <80>, <81>;
interrupt-names = "tx", "rx";
/* DMA channels 8 and 9 executed on eDMA TC2 - high priority queue */
dmas = <&edma 8 2>,
<&edma 9 2>;
dma-names = "tx", "rx";
};
2.
edma1: edma@2728000 {
compatible = "ti,k2g-edma3-tpcc", "ti,edma3-tpcc";
reg = <0x02728000 0x8000>;
reg-names = "edma3_cc";
interrupts = <GIC_SPI 208 IRQ_TYPE_EDGE_RISING>,
<GIC_SPI 219 IRQ_TYPE_EDGE_RISING>,
<GIC_SPI 220 IRQ_TYPE_EDGE_RISING>;
interrupt-names = "edma3_ccint", "emda3_mperr",
"edma3_ccerrint";
dma-requests = <64>;
#dma-cells = <2>;
ti,tptcs = <&edma1_tptc0 7>, <&edma1_tptc1 0>;
/*
* memcpy is disabled, can be enabled with:
* ti,edma-memcpy-channels = <12 13 14 15>;
* for example.
*/
power-domains = <&k2g_pds 0x4f>;
};
edma1_tptc0: tptc@27b0000 {
compatible = "ti,k2g-edma3-tptc", "ti,edma3-tptc";
reg = <0x027b0000 0x400>;
power-domains = <&k2g_pds 0x4f>;
};
edma1_tptc1: tptc@27b8000 {
compatible = "ti,k2g-edma3-tptc", "ti,edma3-tptc";
reg = <0x027b8000 0x400>;
power-domains = <&k2g_pds 0x4f>;
};
mmc0: mmc@23000000 {
compatible = "ti,k2g-hsmmc", "ti,omap4-hsmmc";
reg = <0x23000000 0x400>;
interrupts = <GIC_SPI 96 IRQ_TYPE_EDGE_RISING>;
dmas = <&edma1 24 0>, <&edma1 25 0>;
dma-names = "tx", "rx";
bus-width = <4>;
ti,needs-special-reset;
no-1-8-v;
max-frequency = <96000000>;
power-domains = <&k2g_pds 0xb>;
clocks = <&k2g_clks 0xb 1>, <&k2g_clks 0xb 2>;
clock-names = "fck", "mmchsdb_fck";
};
------------------------------------------------------------------------------
DEPRECATED binding, new DTS files must use the ti,edma3-tpcc/ti,edma3-tptc
binding.
Required properties:
- compatible : "ti,edma3"
- #dma-cells: Should be set to <1>
Clients should use a single channel number per DMA request.
- reg: Memory map for accessing module
- interrupts: Exactly 3 interrupts need to be specified in the order:
1. Transfer completion interrupt.
2. Memory protection interrupt.
3. Error interrupt.
Optional properties:
- ti,hwmods: Name of the hwmods associated to the EDMA
- ti,edma-xbar-event-map: Crossbar event to channel map
Deprecated properties:
Listed here in case one wants to boot an old kernel with new DTB. These
properties might need to be added to the new DTS files.
- ti,edma-regions: Number of regions
- ti,edma-slots: Number of slots
- dma-channels: Specify total DMA channels per CC
Example:
edma: edma@49000000 {
reg = <0x49000000 0x10000>;
interrupt-parent = <&intc>;
interrupts = <12 13 14>;
compatible = "ti,edma3";
ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";
#dma-cells = <1>;
ti,edma-xbar-event-map = /bits/ 16 <1 12
2 13>;
};
|
