139 lines
4.3 KiB
Plaintext
139 lines
4.3 KiB
Plaintext
* DMA40 DMA Controller
|
|
|
|
Required properties:
|
|
- compatible: "stericsson,dma40"
|
|
- reg: Address range of the DMAC registers
|
|
- reg-names: Names of the above areas to use during resource look-up
|
|
- interrupt: Should contain the DMAC interrupt number
|
|
- #dma-cells: must be <3>
|
|
- memcpy-channels: Channels to be used for memcpy
|
|
|
|
Optional properties:
|
|
- dma-channels: Number of channels supported by hardware - if not present
|
|
the driver will attempt to obtain the information from H/W
|
|
- disabled-channels: Channels which can not be used
|
|
|
|
Example:
|
|
|
|
dma: dma-controller@801c0000 {
|
|
compatible = "stericsson,db8500-dma40", "stericsson,dma40";
|
|
reg = <0x801C0000 0x1000 0x40010000 0x800>;
|
|
reg-names = "base", "lcpa";
|
|
interrupt-parent = <&intc>;
|
|
interrupts = <0 25 0x4>;
|
|
|
|
#dma-cells = <2>;
|
|
memcpy-channels = <56 57 58 59 60>;
|
|
disabled-channels = <12>;
|
|
dma-channels = <8>;
|
|
};
|
|
|
|
Clients
|
|
Required properties:
|
|
- dmas: Comma separated list of dma channel requests
|
|
- dma-names: Names of the aforementioned requested channels
|
|
|
|
Each dmas request consists of 4 cells:
|
|
1. A phandle pointing to the DMA controller
|
|
2. Device signal number, the signal line for single and burst requests
|
|
connected from the device to the DMA40 engine
|
|
3. The DMA request line number (only when 'use fixed channel' is set)
|
|
4. A 32bit mask specifying; mode, direction and endianness
|
|
[NB: This list will grow]
|
|
0x00000001: Mode:
|
|
Logical channel when unset
|
|
Physical channel when set
|
|
0x00000002: Direction:
|
|
Memory to Device when unset
|
|
Device to Memory when set
|
|
0x00000004: Endianness:
|
|
Little endian when unset
|
|
Big endian when set
|
|
0x00000008: Use fixed channel:
|
|
Use automatic channel selection when unset
|
|
Use DMA request line number when set
|
|
0x00000010: Set channel as high priority:
|
|
Normal priority when unset
|
|
High priority when set
|
|
|
|
Existing signal numbers for the DB8500 ASIC. Unless specified, the signals are
|
|
bidirectional, i.e. the same for RX and TX operations:
|
|
|
|
0: SPI controller 0
|
|
1: SD/MMC controller 0 (unused)
|
|
2: SD/MMC controller 1 (unused)
|
|
3: SD/MMC controller 2 (unused)
|
|
4: I2C port 1
|
|
5: I2C port 3
|
|
6: I2C port 2
|
|
7: I2C port 4
|
|
8: Synchronous Serial Port SSP0
|
|
9: Synchronous Serial Port SSP1
|
|
10: Multi-Channel Display Engine MCDE RX
|
|
11: UART port 2
|
|
12: UART port 1
|
|
13: UART port 0
|
|
14: Multirate Serial Port MSP2
|
|
15: I2C port 0
|
|
16: USB OTG in/out endpoints 7 & 15
|
|
17: USB OTG in/out endpoints 6 & 14
|
|
18: USB OTG in/out endpoints 5 & 13
|
|
19: USB OTG in/out endpoints 4 & 12
|
|
20: SLIMbus or HSI channel 0
|
|
21: SLIMbus or HSI channel 1
|
|
22: SLIMbus or HSI channel 2
|
|
23: SLIMbus or HSI channel 3
|
|
24: Multimedia DSP SXA0
|
|
25: Multimedia DSP SXA1
|
|
26: Multimedia DSP SXA2
|
|
27: Multimedia DSP SXA3
|
|
28: SD/MM controller 2
|
|
29: SD/MM controller 0
|
|
30: MSP port 1 on DB8500 v1, MSP port 3 on DB8500 v2
|
|
31: MSP port 0 or SLIMbus channel 0
|
|
32: SD/MM controller 1
|
|
33: SPI controller 2
|
|
34: i2c3 RX2 TX2
|
|
35: SPI controller 1
|
|
36: USB OTG in/out endpoints 3 & 11
|
|
37: USB OTG in/out endpoints 2 & 10
|
|
38: USB OTG in/out endpoints 1 & 9
|
|
39: USB OTG in/out endpoints 8
|
|
40: SPI controller 3
|
|
41: SD/MM controller 3
|
|
42: SD/MM controller 4
|
|
43: SD/MM controller 5
|
|
44: Multimedia DSP SXA4
|
|
45: Multimedia DSP SXA5
|
|
46: SLIMbus channel 8 or Multimedia DSP SXA6
|
|
47: SLIMbus channel 9 or Multimedia DSP SXA7
|
|
48: Crypto Accelerator 1
|
|
49: Crypto Accelerator 1 TX or Hash Accelerator 1 TX
|
|
50: Hash Accelerator 1 TX
|
|
51: memcpy TX (to be used by the DMA driver for memcpy operations)
|
|
52: SLIMbus or HSI channel 4
|
|
53: SLIMbus or HSI channel 5
|
|
54: SLIMbus or HSI channel 6
|
|
55: SLIMbus or HSI channel 7
|
|
56: memcpy (to be used by the DMA driver for memcpy operations)
|
|
57: memcpy (to be used by the DMA driver for memcpy operations)
|
|
58: memcpy (to be used by the DMA driver for memcpy operations)
|
|
59: memcpy (to be used by the DMA driver for memcpy operations)
|
|
60: memcpy (to be used by the DMA driver for memcpy operations)
|
|
61: Crypto Accelerator 0
|
|
62: Crypto Accelerator 0 TX or Hash Accelerator 0 TX
|
|
63: Hash Accelerator 0 TX
|
|
|
|
Example:
|
|
|
|
uart@80120000 {
|
|
compatible = "arm,pl011", "arm,primecell";
|
|
reg = <0x80120000 0x1000>;
|
|
interrupts = <0 11 0x4>;
|
|
|
|
dmas = <&dma 13 0 0x2>, /* Logical - DevToMem */
|
|
<&dma 13 0 0x0>; /* Logical - MemToDev */
|
|
dma-names = "rx", "rx";
|
|
|
|
};
|