diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/include/mach/dma.h')
-rw-r--r-- | arch/arm/mach-ep93xx/include/mach/dma.h | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/arch/arm/mach-ep93xx/include/mach/dma.h b/arch/arm/mach-ep93xx/include/mach/dma.h deleted file mode 100644 index e82c642fa53c..000000000000 --- a/arch/arm/mach-ep93xx/include/mach/dma.h +++ /dev/null | |||
@@ -1,93 +0,0 @@ | |||
1 | #ifndef __ASM_ARCH_DMA_H | ||
2 | #define __ASM_ARCH_DMA_H | ||
3 | |||
4 | #include <linux/types.h> | ||
5 | #include <linux/dmaengine.h> | ||
6 | #include <linux/dma-mapping.h> | ||
7 | |||
8 | /* | ||
9 | * M2P channels. | ||
10 | * | ||
11 | * Note that these values are also directly used for setting the PPALLOC | ||
12 | * register. | ||
13 | */ | ||
14 | #define EP93XX_DMA_I2S1 0 | ||
15 | #define EP93XX_DMA_I2S2 1 | ||
16 | #define EP93XX_DMA_AAC1 2 | ||
17 | #define EP93XX_DMA_AAC2 3 | ||
18 | #define EP93XX_DMA_AAC3 4 | ||
19 | #define EP93XX_DMA_I2S3 5 | ||
20 | #define EP93XX_DMA_UART1 6 | ||
21 | #define EP93XX_DMA_UART2 7 | ||
22 | #define EP93XX_DMA_UART3 8 | ||
23 | #define EP93XX_DMA_IRDA 9 | ||
24 | /* M2M channels */ | ||
25 | #define EP93XX_DMA_SSP 10 | ||
26 | #define EP93XX_DMA_IDE 11 | ||
27 | |||
28 | /** | ||
29 | * struct ep93xx_dma_data - configuration data for the EP93xx dmaengine | ||
30 | * @port: peripheral which is requesting the channel | ||
31 | * @direction: TX/RX channel | ||
32 | * @name: optional name for the channel, this is displayed in /proc/interrupts | ||
33 | * | ||
34 | * This information is passed as private channel parameter in a filter | ||
35 | * function. Note that this is only needed for slave/cyclic channels. For | ||
36 | * memcpy channels %NULL data should be passed. | ||
37 | */ | ||
38 | struct ep93xx_dma_data { | ||
39 | int port; | ||
40 | enum dma_transfer_direction direction; | ||
41 | const char *name; | ||
42 | }; | ||
43 | |||
44 | /** | ||
45 | * struct ep93xx_dma_chan_data - platform specific data for a DMA channel | ||
46 | * @name: name of the channel, used for getting the right clock for the channel | ||
47 | * @base: mapped registers | ||
48 | * @irq: interrupt number used by this channel | ||
49 | */ | ||
50 | struct ep93xx_dma_chan_data { | ||
51 | const char *name; | ||
52 | void __iomem *base; | ||
53 | int irq; | ||
54 | }; | ||
55 | |||
56 | /** | ||
57 | * struct ep93xx_dma_platform_data - platform data for the dmaengine driver | ||
58 | * @channels: array of channels which are passed to the driver | ||
59 | * @num_channels: number of channels in the array | ||
60 | * | ||
61 | * This structure is passed to the DMA engine driver via platform data. For | ||
62 | * M2P channels, contract is that even channels are for TX and odd for RX. | ||
63 | * There is no requirement for the M2M channels. | ||
64 | */ | ||
65 | struct ep93xx_dma_platform_data { | ||
66 | struct ep93xx_dma_chan_data *channels; | ||
67 | size_t num_channels; | ||
68 | }; | ||
69 | |||
70 | static inline bool ep93xx_dma_chan_is_m2p(struct dma_chan *chan) | ||
71 | { | ||
72 | return !strcmp(dev_name(chan->device->dev), "ep93xx-dma-m2p"); | ||
73 | } | ||
74 | |||
75 | /** | ||
76 | * ep93xx_dma_chan_direction - returns direction the channel can be used | ||
77 | * @chan: channel | ||
78 | * | ||
79 | * This function can be used in filter functions to find out whether the | ||
80 | * channel supports given DMA direction. Only M2P channels have such | ||
81 | * limitation, for M2M channels the direction is configurable. | ||
82 | */ | ||
83 | static inline enum dma_transfer_direction | ||
84 | ep93xx_dma_chan_direction(struct dma_chan *chan) | ||
85 | { | ||
86 | if (!ep93xx_dma_chan_is_m2p(chan)) | ||
87 | return DMA_NONE; | ||
88 | |||
89 | /* even channels are for TX, odd for RX */ | ||
90 | return (chan->chan_id % 2 == 0) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; | ||
91 | } | ||
92 | |||
93 | #endif /* __ASM_ARCH_DMA_H */ | ||