| * Freescale DMA Controllers |
| |
| ** Freescale Elo DMA Controller |
| This is a little-endian 4-channel DMA controller, used in Freescale mpc83xx |
| series chips such as mpc8315, mpc8349, mpc8379 etc. |
| |
| Required properties: |
| |
| - compatible : must include "fsl,elo-dma" |
| - reg : DMA General Status Register, i.e. DGSR which contains |
| status for all the 4 DMA channels |
| - ranges : describes the mapping between the address space of the |
| DMA channels and the address space of the DMA controller |
| - cell-index : controller index. 0 for controller @ 0x8100 |
| - interrupts : interrupt specifier for DMA IRQ |
| |
| - DMA channel nodes: |
| - compatible : must include "fsl,elo-dma-channel" |
| However, see note below. |
| - reg : DMA channel specific registers |
| - cell-index : DMA channel index starts at 0. |
| |
| Optional properties: |
| - interrupts : interrupt specifier for DMA channel IRQ |
| (on 83xx this is expected to be identical to |
| the interrupts property of the parent node) |
| |
| Example: |
| dma@82a8 { |
| #address-cells = <1>; |
| #size-cells = <1>; |
| compatible = "fsl,mpc8349-dma", "fsl,elo-dma"; |
| reg = <0x82a8 4>; |
| ranges = <0 0x8100 0x1a4>; |
| interrupt-parent = <&ipic>; |
| interrupts = <71 8>; |
| cell-index = <0>; |
| dma-channel@0 { |
| compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel"; |
| cell-index = <0>; |
| reg = <0 0x80>; |
| interrupt-parent = <&ipic>; |
| interrupts = <71 8>; |
| }; |
| dma-channel@80 { |
| compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel"; |
| cell-index = <1>; |
| reg = <0x80 0x80>; |
| interrupt-parent = <&ipic>; |
| interrupts = <71 8>; |
| }; |
| dma-channel@100 { |
| compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel"; |
| cell-index = <2>; |
| reg = <0x100 0x80>; |
| interrupt-parent = <&ipic>; |
| interrupts = <71 8>; |
| }; |
| dma-channel@180 { |
| compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel"; |
| cell-index = <3>; |
| reg = <0x180 0x80>; |
| interrupt-parent = <&ipic>; |
| interrupts = <71 8>; |
| }; |
| }; |
| |
| ** Freescale EloPlus DMA Controller |
| This is a 4-channel DMA controller with extended addresses and chaining, |
| mainly used in Freescale mpc85xx/86xx, Pxxx and BSC series chips, such as |
| mpc8540, mpc8641 p4080, bsc9131 etc. |
| |
| Required properties: |
| |
| - compatible : must include "fsl,eloplus-dma" |
| - reg : DMA General Status Register, i.e. DGSR which contains |
| status for all the 4 DMA channels |
| - cell-index : controller index. 0 for controller @ 0x21000, |
| 1 for controller @ 0xc000 |
| - ranges : describes the mapping between the address space of the |
| DMA channels and the address space of the DMA controller |
| |
| - DMA channel nodes: |
| - compatible : must include "fsl,eloplus-dma-channel" |
| However, see note below. |
| - cell-index : DMA channel index starts at 0. |
| - reg : DMA channel specific registers |
| - interrupts : interrupt specifier for DMA channel IRQ |
| |
| Example: |
| dma@21300 { |
| #address-cells = <1>; |
| #size-cells = <1>; |
| compatible = "fsl,mpc8540-dma", "fsl,eloplus-dma"; |
| reg = <0x21300 4>; |
| ranges = <0 0x21100 0x200>; |
| cell-index = <0>; |
| dma-channel@0 { |
| compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel"; |
| reg = <0 0x80>; |
| cell-index = <0>; |
| interrupt-parent = <&mpic>; |
| interrupts = <20 2>; |
| }; |
| dma-channel@80 { |
| compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel"; |
| reg = <0x80 0x80>; |
| cell-index = <1>; |
| interrupt-parent = <&mpic>; |
| interrupts = <21 2>; |
| }; |
| dma-channel@100 { |
| compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel"; |
| reg = <0x100 0x80>; |
| cell-index = <2>; |
| interrupt-parent = <&mpic>; |
| interrupts = <22 2>; |
| }; |
| dma-channel@180 { |
| compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel"; |
| reg = <0x180 0x80>; |
| cell-index = <3>; |
| interrupt-parent = <&mpic>; |
| interrupts = <23 2>; |
| }; |
| }; |
| |
| ** Freescale Elo3 DMA Controller |
| DMA controller which has same function as EloPlus except that Elo3 has 8 |
| channels while EloPlus has only 4, it is used in Freescale Txxx and Bxxx |
| series chips, such as t1040, t4240, b4860. |
| |
| Required properties: |
| |
| - compatible : must include "fsl,elo3-dma" |
| - reg : contains two entries for DMA General Status Registers, |
| i.e. DGSR0 which includes status for channel 1~4, and |
| DGSR1 for channel 5~8 |
| - ranges : describes the mapping between the address space of the |
| DMA channels and the address space of the DMA controller |
| |
| - DMA channel nodes: |
| - compatible : must include "fsl,eloplus-dma-channel" |
| - reg : DMA channel specific registers |
| - interrupts : interrupt specifier for DMA channel IRQ |
| |
| Example: |
| dma@100300 { |
| #address-cells = <1>; |
| #size-cells = <1>; |
| compatible = "fsl,elo3-dma"; |
| reg = <0x100300 0x4>, |
| <0x100600 0x4>; |
| ranges = <0x0 0x100100 0x500>; |
| dma-channel@0 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x0 0x80>; |
| interrupts = <28 2 0 0>; |
| }; |
| dma-channel@80 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x80 0x80>; |
| interrupts = <29 2 0 0>; |
| }; |
| dma-channel@100 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x100 0x80>; |
| interrupts = <30 2 0 0>; |
| }; |
| dma-channel@180 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x180 0x80>; |
| interrupts = <31 2 0 0>; |
| }; |
| dma-channel@300 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x300 0x80>; |
| interrupts = <76 2 0 0>; |
| }; |
| dma-channel@380 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x380 0x80>; |
| interrupts = <77 2 0 0>; |
| }; |
| dma-channel@400 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x400 0x80>; |
| interrupts = <78 2 0 0>; |
| }; |
| dma-channel@480 { |
| compatible = "fsl,eloplus-dma-channel"; |
| reg = <0x480 0x80>; |
| interrupts = <79 2 0 0>; |
| }; |
| }; |
| |
| Note on DMA channel compatible properties: The compatible property must say |
| "fsl,elo-dma-channel" or "fsl,eloplus-dma-channel" to be used by the Elo DMA |
| driver (fsldma). Any DMA channel used by fsldma cannot be used by another |
| DMA driver, such as the SSI sound drivers for the MPC8610. Therefore, any DMA |
| channel that should be used for another driver should not use |
| "fsl,elo-dma-channel" or "fsl,eloplus-dma-channel". For the SSI drivers, for |
| example, the compatible property should be "fsl,ssi-dma-channel". See ssi.txt |
| for more information. |
