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_DT_PROP = -1, /* not yet supported, do not use */
  25         DMACH_UART0 = 0,
  26         DMACH_UART0_SRC2,
  27         DMACH_UART1,
  28         DMACH_UART1_SRC2,
  29         DMACH_UART2,
  30         DMACH_UART2_SRC2,
  31         DMACH_UART3,
  32         DMACH_UART3_SRC2,
  33         DMACH_PCM0_TX,
  34         DMACH_PCM0_RX,
  35         DMACH_I2S0_OUT,
  36         DMACH_I2S0_IN,
  37         DMACH_SPI0_TX,
  38         DMACH_SPI0_RX,
  39         DMACH_HSI_I2SV40_TX,
  40         DMACH_HSI_I2SV40_RX,
  41
  42         /* DMA1/SDMA1 */
  43         DMACH_PCM1_TX = 16,
  44         DMACH_PCM1_RX,
  45         DMACH_I2S1_OUT,
  46         DMACH_I2S1_IN,
  47         DMACH_SPI1_TX,
  48         DMACH_SPI1_RX,
  49         DMACH_AC97_PCMOUT,
  50         DMACH_AC97_PCMIN,
  51         DMACH_AC97_MICIN,
  52         DMACH_PWM,
  53         DMACH_IRDA,
  54         DMACH_EXTERNAL,
  55         DMACH_RES1,
  56         DMACH_RES2,
  57         DMACH_SECURITY_RX,      /* SDMA1 only */
  58         DMACH_SECURITY_TX,      /* SDMA1 only */
  59         DMACH_MAX               /* the end */
  60 };
  61
  62 static inline bool samsung_dma_has_circular(void)
  63 {
  64         return true;
  65 }
  66
  67 static inline bool samsung_dma_is_dmadev(void)
  68 {
  69         return false;
  70 }
  71 #define S3C2410_DMAF_CIRCULAR           (1 << 0)
  72
  73 #include <plat/dma.h>
  74
  75 #define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
  76
  77 struct s3c64xx_dma_buff;
  78
  79 /** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor
  80  * @next: Pointer to next buffer in queue or ring.
  81  * @pw: Client provided identifier
  82  * @lli: Pointer to hardware descriptor this buffer is associated with.
  83  * @lli_dma: Hardare address of the descriptor.
  84  */
  85 struct s3c64xx_dma_buff {
  86         struct s3c64xx_dma_buff *next;
  87
  88         void                    *pw;
  89         struct pl080s_lli       *lli;
  90         dma_addr_t               lli_dma;
  91 };
  92
  93 struct s3c64xx_dmac;
  94
  95 struct s3c2410_dma_chan {
  96         unsigned char            number;      /* number of this dma channel */
  97         unsigned char            in_use;      /* channel allocated */
  98         unsigned char            bit;         /* bit for enable/disable/etc */
  99         unsigned char            hw_width;
 100         unsigned char            peripheral;
 101
 102         unsigned int             flags;
 103         enum dma_data_direction  source;
 104
 105
 106         dma_addr_t              dev_addr;
 107
 108         struct s3c2410_dma_client *client;
 109         struct s3c64xx_dmac     *dmac;          /* pointer to controller */
 110
 111         void __iomem            *regs;
 112
 113         /* cdriver callbacks */
 114         s3c2410_dma_cbfn_t       callback_fn;   /* buffer done callback */
 115         s3c2410_dma_opfn_t       op_fn;         /* channel op callback */
 116
 117         /* buffer list and information */
 118         struct s3c64xx_dma_buff *curr;          /* current dma buffer */
 119         struct s3c64xx_dma_buff *next;          /* next buffer to load */
 120         struct s3c64xx_dma_buff *end;           /* end of queue */
 121
 122         /* note, when channel is running in circular mode, curr is the
 123          * first buffer enqueued, end is the last and curr is where the
 124          * last buffer-done event is set-at. The buffers are not freed
 125          * and the last buffer hardware descriptor points back to the
 126          * first.
 127          */
 128 };
 129
 130 #include <plat/dma-core.h>
 131
 132 #endif /* __ASM_ARCH_IRQ_H */