Merge branch 'sh/driver-core'
[pandora-kernel.git] / arch / arm / mach-s3c64xx / include / mach / dma.h
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
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
61 static __inline__ bool s3c_dma_has_circular(void)
62 {
63         return true;
64 }
65
66 #define S3C2410_DMAF_CIRCULAR           (1 << 0)
67
68 #include <plat/dma.h>
69
70 #define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
71
72 struct s3c64xx_dma_buff;
73
74 /** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor
75  * @next: Pointer to next buffer in queue or ring.
76  * @pw: Client provided identifier
77  * @lli: Pointer to hardware descriptor this buffer is associated with.
78  * @lli_dma: Hardare address of the descriptor.
79  */
80 struct s3c64xx_dma_buff {
81         struct s3c64xx_dma_buff *next;
82
83         void                    *pw;
84         struct pl080s_lli       *lli;
85         dma_addr_t               lli_dma;
86 };
87
88 struct s3c64xx_dmac;
89
90 struct s3c2410_dma_chan {
91         unsigned char            number;      /* number of this dma channel */
92         unsigned char            in_use;      /* channel allocated */
93         unsigned char            bit;         /* bit for enable/disable/etc */
94         unsigned char            hw_width;
95         unsigned char            peripheral;
96
97         unsigned int             flags;
98         enum s3c2410_dmasrc      source;
99
100
101         dma_addr_t              dev_addr;
102
103         struct s3c2410_dma_client *client;
104         struct s3c64xx_dmac     *dmac;          /* pointer to controller */
105
106         void __iomem            *regs;
107
108         /* cdriver callbacks */
109         s3c2410_dma_cbfn_t       callback_fn;   /* buffer done callback */
110         s3c2410_dma_opfn_t       op_fn;         /* channel op callback */
111
112         /* buffer list and information */
113         struct s3c64xx_dma_buff *curr;          /* current dma buffer */
114         struct s3c64xx_dma_buff *next;          /* next buffer to load */
115         struct s3c64xx_dma_buff *end;           /* end of queue */
116
117         /* note, when channel is running in circular mode, curr is the
118          * first buffer enqueued, end is the last and curr is where the
119          * last buffer-done event is set-at. The buffers are not freed
120          * and the last buffer hardware descriptor points back to the
121          * first.
122          */
123 };
124
125 #include <plat/dma-core.h>
126
127 #endif /* __ASM_ARCH_IRQ_H */