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fsl_dma.h

/*
 * mpc8610-pcm.h - ALSA PCM interface for the Freescale MPC8610 SoC
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _MPC8610_PCM_H
#define _MPC8610_PCM_H

struct ccsr_dma {
      u8 res0[0x100];
      struct ccsr_dma_channel {
            __be32 mr;      /* Mode register */
            __be32 sr;      /* Status register */
            __be32 eclndar; /* Current link descriptor extended addr reg */
            __be32 clndar;  /* Current link descriptor address register */
            __be32 satr;    /* Source attributes register */
            __be32 sar;     /* Source address register */
            __be32 datr;    /* Destination attributes register */
            __be32 dar;     /* Destination address register */
            __be32 bcr;     /* Byte count register */
            __be32 enlndar; /* Next link descriptor extended address reg */
            __be32 nlndar;  /* Next link descriptor address register */
            u8 res1[4];
            __be32 eclsdar; /* Current list descriptor extended addr reg */
            __be32 clsdar;  /* Current list descriptor address register */
            __be32 enlsdar; /* Next list descriptor extended address reg */
            __be32 nlsdar;  /* Next list descriptor address register */
            __be32 ssr;     /* Source stride register */
            __be32 dsr;     /* Destination stride register */
            u8 res2[0x38];
      } channel[4];
      __be32 dgsr;
};

#define CCSR_DMA_MR_BWC_DISABLED    0x0F000000
#define CCSR_DMA_MR_BWC_SHIFT       24
#define CCSR_DMA_MR_BWC_MASK        0x0F000000
#define CCSR_DMA_MR_BWC(x) \
      ((ilog2(x) << CCSR_DMA_MR_BWC_SHIFT) & CCSR_DMA_MR_BWC_MASK)
#define CCSR_DMA_MR_EMP_EN          0x00200000
#define CCSR_DMA_MR_EMS_EN          0x00040000
#define CCSR_DMA_MR_DAHTS_MASK      0x00030000
#define CCSR_DMA_MR_DAHTS_1         0x00000000
#define CCSR_DMA_MR_DAHTS_2         0x00010000
#define CCSR_DMA_MR_DAHTS_4         0x00020000
#define CCSR_DMA_MR_DAHTS_8         0x00030000
#define CCSR_DMA_MR_SAHTS_MASK      0x0000C000
#define CCSR_DMA_MR_SAHTS_1         0x00000000
#define CCSR_DMA_MR_SAHTS_2         0x00004000
#define CCSR_DMA_MR_SAHTS_4         0x00008000
#define CCSR_DMA_MR_SAHTS_8         0x0000C000
#define CCSR_DMA_MR_DAHE            0x00002000
#define CCSR_DMA_MR_SAHE            0x00001000
#define CCSR_DMA_MR_SRW             0x00000400
#define CCSR_DMA_MR_EOSIE           0x00000200
#define CCSR_DMA_MR_EOLNIE          0x00000100
#define CCSR_DMA_MR_EOLSIE          0x00000080
#define CCSR_DMA_MR_EIE             0x00000040
#define CCSR_DMA_MR_XFE             0x00000020
#define CCSR_DMA_MR_CDSM_SWSM       0x00000010
#define CCSR_DMA_MR_CA              0x00000008
#define CCSR_DMA_MR_CTM             0x00000004
#define CCSR_DMA_MR_CC              0x00000002
#define CCSR_DMA_MR_CS              0x00000001

#define CCSR_DMA_SR_TE              0x00000080
#define CCSR_DMA_SR_CH              0x00000020
#define CCSR_DMA_SR_PE              0x00000010
#define CCSR_DMA_SR_EOLNI           0x00000008
#define CCSR_DMA_SR_CB              0x00000004
#define CCSR_DMA_SR_EOSI            0x00000002
#define CCSR_DMA_SR_EOLSI           0x00000001

/* ECLNDAR takes bits 32-36 of the CLNDAR register */
static inline u32 CCSR_DMA_ECLNDAR_ADDR(u64 x)
{
      return (x >> 32) & 0xf;
}

#define CCSR_DMA_CLNDAR_ADDR(x) ((x) & 0xFFFFFFFE)
#define CCSR_DMA_CLNDAR_EOSIE       0x00000008

/* SATR and DATR, combined */
#define CCSR_DMA_ATR_PBATMU         0x20000000
#define CCSR_DMA_ATR_TFLOWLVL_0     0x00000000
#define CCSR_DMA_ATR_TFLOWLVL_1     0x06000000
#define CCSR_DMA_ATR_TFLOWLVL_2     0x08000000
#define CCSR_DMA_ATR_TFLOWLVL_3     0x0C000000
#define CCSR_DMA_ATR_PCIORDER       0x02000000
#define CCSR_DMA_ATR_SME            0x01000000
#define CCSR_DMA_ATR_NOSNOOP        0x00040000
#define CCSR_DMA_ATR_SNOOP          0x00050000
#define CCSR_DMA_ATR_ESAD_MASK      0x0000000F

/**
 *  List Descriptor for extended chaining mode DMA operations.
 *
 *  The CLSDAR register points to the first (in a linked-list) List
 *  Descriptor.  Each object must be aligned on a 32-byte boundary. Each
 *  list descriptor points to a linked-list of link Descriptors.
 */
00105 struct fsl_dma_list_descriptor {
      __be64 next;      /* Address of next list descriptor */
      __be64 first_link;      /* Address of first link descriptor */
      __be32 source;    /* Source stride */
      __be32 dest;      /* Destination stride */
      u8 res[8];        /* Reserved */
} __attribute__ ((aligned(32), packed));

/**
 *  Link Descriptor for basic and extended chaining mode DMA operations.
 *
 *  A Link Descriptor points to a single DMA buffer.  Each link descriptor
 *  must be aligned on a 32-byte boundary.
 */
00119 struct fsl_dma_link_descriptor {
      __be32 source_attr;     /* Programmed into SATR register */
      __be32 source_addr;     /* Programmed into SAR register */
      __be32 dest_attr;       /* Programmed into DATR register */
      __be32 dest_addr;       /* Programmed into DAR register */
      __be64 next;    /* Address of next link descriptor */
      __be32 count;   /* Byte count */
      u8 res[4];      /* Reserved */
} __attribute__ ((aligned(32), packed));

/* DMA information needed to create a snd_soc_cpu_dai object
 *
 * ssi_stx_phys: bus address of SSI STX register to use
 * ssi_srx_phys: bus address of SSI SRX register to use
 * dma[0]: points to the DMA channel to use for playback
 * dma[1]: points to the DMA channel to use for capture
 * dma_irq[0]: IRQ of the DMA channel to use for playback
 * dma_irq[1]: IRQ of the DMA channel to use for capture
 */
struct fsl_dma_info {
      dma_addr_t ssi_stx_phys;
      dma_addr_t ssi_srx_phys;
      struct ccsr_dma_channel __iomem *dma_channel[2];
      unsigned int dma_irq[2];
};

extern struct snd_soc_platform fsl_soc_platform;

int fsl_dma_configure(struct fsl_dma_info *dma_info);

#endif

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