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d521f87e BD |
1 | /* linux/arch/arm/mach-s3c6400/include/mach/dma.h |
2 | * | |
3 | * Copyright 2008 Openmoko, Inc. | |
4 | * Copyright 2008 Simtec Electronics | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * http://armlinux.simtec.co.uk/ | |
7 | * | |
8 | * S3C6400 - DMA support | |
9 | */ | |
10 | ||
11 | #ifndef __ASM_ARCH_DMA_H | |
12 | #define __ASM_ARCH_DMA_H __FILE__ | |
13 | ||
fa7a7883 BD |
14 | #define S3C_DMA_CHANNELS (16) |
15 | ||
16 | /* see mach-s3c2410/dma.h for notes on dma channel numbers */ | |
17 | ||
18 | /* Note, for the S3C64XX architecture we keep the DMACH_ | |
19 | * defines in the order they are allocated to [S]DMA0/[S]DMA1 | |
20 | * so that is easy to do DHACH_ -> DMA controller conversion | |
21 | */ | |
22 | enum dma_ch { | |
23 | /* DMA0/SDMA0 */ | |
24 | DMACH_UART0 = 0, | |
25 | DMACH_UART0_SRC2, | |
26 | DMACH_UART1, | |
27 | DMACH_UART1_SRC2, | |
28 | DMACH_UART2, | |
29 | DMACH_UART2_SRC2, | |
30 | DMACH_UART3, | |
31 | DMACH_UART3_SRC2, | |
32 | DMACH_PCM0_TX, | |
33 | DMACH_PCM0_RX, | |
34 | DMACH_I2S0_OUT, | |
35 | DMACH_I2S0_IN, | |
36 | DMACH_SPI0_TX, | |
37 | DMACH_SPI0_RX, | |
38 | DMACH_HSI_I2SV40_TX, | |
39 | DMACH_HSI_I2SV40_RX, | |
40 | ||
41 | /* DMA1/SDMA1 */ | |
42 | DMACH_PCM1_TX = 16, | |
43 | DMACH_PCM1_RX, | |
44 | DMACH_I2S1_OUT, | |
45 | DMACH_I2S1_IN, | |
46 | DMACH_SPI1_TX, | |
47 | DMACH_SPI1_RX, | |
48 | DMACH_AC97_PCMOUT, | |
49 | DMACH_AC97_PCMIN, | |
50 | DMACH_AC97_MICIN, | |
51 | DMACH_PWM, | |
52 | DMACH_IRDA, | |
53 | DMACH_EXTERNAL, | |
54 | DMACH_RES1, | |
55 | DMACH_RES2, | |
56 | DMACH_SECURITY_RX, /* SDMA1 only */ | |
57 | DMACH_SECURITY_TX, /* SDMA1 only */ | |
58 | DMACH_MAX /* the end */ | |
59 | }; | |
60 | ||
344b4c48 | 61 | static inline bool samsung_dma_has_circular(void) |
fa7a7883 | 62 | { |
b3c5496f | 63 | return true; |
fa7a7883 BD |
64 | } |
65 | ||
c4e16625 BK |
66 | static inline bool samsung_dma_is_dmadev(void) |
67 | { | |
68 | return false; | |
69 | } | |
fa7a7883 BD |
70 | #define S3C2410_DMAF_CIRCULAR (1 << 0) |
71 | ||
72 | #include <plat/dma.h> | |
d521f87e | 73 | |
992426bf BD |
74 | #define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */ |
75 | ||
76 | struct s3c64xx_dma_buff; | |
77 | ||
78 | /** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor | |
79 | * @next: Pointer to next buffer in queue or ring. | |
80 | * @pw: Client provided identifier | |
81 | * @lli: Pointer to hardware descriptor this buffer is associated with. | |
82 | * @lli_dma: Hardare address of the descriptor. | |
83 | */ | |
84 | struct s3c64xx_dma_buff { | |
85 | struct s3c64xx_dma_buff *next; | |
86 | ||
87 | void *pw; | |
88 | struct pl080s_lli *lli; | |
89 | dma_addr_t lli_dma; | |
90 | }; | |
91 | ||
92 | struct s3c64xx_dmac; | |
93 | ||
94 | struct s3c2410_dma_chan { | |
95 | unsigned char number; /* number of this dma channel */ | |
96 | unsigned char in_use; /* channel allocated */ | |
97 | unsigned char bit; /* bit for enable/disable/etc */ | |
98 | unsigned char hw_width; | |
99 | unsigned char peripheral; | |
100 | ||
101 | unsigned int flags; | |
51ddf31d | 102 | enum dma_data_direction source; |
992426bf BD |
103 | |
104 | ||
105 | dma_addr_t dev_addr; | |
106 | ||
107 | struct s3c2410_dma_client *client; | |
108 | struct s3c64xx_dmac *dmac; /* pointer to controller */ | |
109 | ||
110 | void __iomem *regs; | |
111 | ||
112 | /* cdriver callbacks */ | |
113 | s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */ | |
114 | s3c2410_dma_opfn_t op_fn; /* channel op callback */ | |
115 | ||
116 | /* buffer list and information */ | |
117 | struct s3c64xx_dma_buff *curr; /* current dma buffer */ | |
118 | struct s3c64xx_dma_buff *next; /* next buffer to load */ | |
119 | struct s3c64xx_dma_buff *end; /* end of queue */ | |
120 | ||
121 | /* note, when channel is running in circular mode, curr is the | |
122 | * first buffer enqueued, end is the last and curr is where the | |
123 | * last buffer-done event is set-at. The buffers are not freed | |
124 | * and the last buffer hardware descriptor points back to the | |
125 | * first. | |
126 | */ | |
127 | }; | |
128 | ||
129 | #include <plat/dma-core.h> | |
130 | ||
d521f87e | 131 | #endif /* __ASM_ARCH_IRQ_H */ |