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siu.h

/*
 * siu.h - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
 *
 * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef SIU_H
#define SIU_H

/* Common kernel and user-space firmware-building defines and types */

#define YRAM0_SIZE            (0x0040 / 4)            /* 16 */
#define YRAM1_SIZE            (0x0080 / 4)            /* 32 */
#define YRAM2_SIZE            (0x0040 / 4)            /* 16 */
#define YRAM3_SIZE            (0x0080 / 4)            /* 32 */
#define YRAM4_SIZE            (0x0080 / 4)            /* 32 */
#define YRAM_DEF_SIZE         (YRAM0_SIZE + YRAM1_SIZE + YRAM2_SIZE + \
                         YRAM3_SIZE + YRAM4_SIZE)
#define YRAM_FIR_SIZE         (0x0400 / 4)            /* 256 */
#define YRAM_IIR_SIZE         (0x0200 / 4)            /* 128 */

#define XRAM0_SIZE            (0x0400 / 4)            /* 256 */
#define XRAM1_SIZE            (0x0200 / 4)            /* 128 */
#define XRAM2_SIZE            (0x0200 / 4)            /* 128 */

/* PRAM program array size */
#define PRAM0_SIZE            (0x0100 / 4)            /* 64 */
#define PRAM1_SIZE            ((0x2000 - 0x0100) / 4) /* 1984 */

#include <linux/types.h>

struct siu_spb_param {
      __u32 ab1a; /* input FIFO address */
      __u32 ab0a; /* output FIFO address */
      __u32 dir;  /* 0=the ather except CPUOUTPUT, 1=CPUINPUT */
      __u32 event;      /* SPB program starting conditions */
      __u32 stfifo;     /* STFIFO register setting value */
      __u32 trdat;      /* TRDAT register setting value */
};

struct siu_firmware {
      __u32             yram_fir_coeff[YRAM_FIR_SIZE];
      __u32             pram0[PRAM0_SIZE];
      __u32             pram1[PRAM1_SIZE];
      __u32             yram0[YRAM0_SIZE];
      __u32             yram1[YRAM1_SIZE];
      __u32             yram2[YRAM2_SIZE];
      __u32             yram3[YRAM3_SIZE];
      __u32             yram4[YRAM4_SIZE];
      __u32             spbpar_num;
      struct siu_spb_param    spbpar[32];
};

#ifdef __KERNEL__

#include <linux/dmaengine.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include <asm/dmaengine.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc-dai.h>

#define SIU_PERIOD_BYTES_MAX  8192        /* DMA transfer/period size */
#define SIU_PERIOD_BYTES_MIN  256         /* DMA transfer/period size */
#define SIU_PERIODS_MAX       64          /* Max periods in buffer */
#define SIU_PERIODS_MIN       4           /* Min periods in buffer */
#define SIU_BUFFER_BYTES_MAX  (SIU_PERIOD_BYTES_MAX * SIU_PERIODS_MAX)

/* SIU ports: only one can be used at a time */
enum {
      SIU_PORT_A,
      SIU_PORT_B,
      SIU_PORT_NUM,
};

/* SIU clock configuration */
enum {
      SIU_CLKA_PLL,
      SIU_CLKA_EXT,
      SIU_CLKB_PLL,
      SIU_CLKB_EXT
};

struct siu_info {
      int               port_id;
      u32 __iomem       *pram;
      u32 __iomem       *xram;
      u32 __iomem       *yram;
      u32 __iomem       *reg;
      struct siu_firmware     fw;
};

struct siu_stream {
      struct tasklet_struct         tasklet;
      struct snd_pcm_substream      *substream;
      snd_pcm_format_t        format;
      size_t                        buf_bytes;
      size_t                        period_bytes;
      int                     cur_period; /* Period currently in dma */
      u32                     volume;
      snd_pcm_sframes_t       xfer_cnt;   /* Number of frames */
      u8                      rw_flg;           /* transfer status */
      /* DMA status */
      struct dma_chan               *chan;            /* DMA channel */
      struct dma_async_tx_descriptor      *tx_desc;
      dma_cookie_t                  cookie;
      struct sh_dmae_slave          param;
};

struct siu_port {
      unsigned long           play_cap;   /* Used to track full duplex */
      struct snd_pcm          *pcm;
      struct siu_stream playback;
      struct siu_stream capture;
      u32               stfifo;           /* STFIFO value from firmware */
      u32               trdat;            /* TRDAT value from firmware */
};

extern struct siu_port *siu_ports[SIU_PORT_NUM];

static inline struct siu_port *siu_port_info(struct snd_pcm_substream *substream)
{
      struct platform_device *pdev =
            to_platform_device(substream->pcm->card->dev);
      return siu_ports[pdev->id];
}

/* Register access */
static inline void siu_write32(u32 __iomem *addr, u32 val)
{
      __raw_writel(val, addr);
}

static inline u32 siu_read32(u32 __iomem *addr)
{
      return __raw_readl(addr);
}

/* SIU registers */
#define SIU_IFCTL (0x000 / sizeof(u32))
#define SIU_SRCTL (0x004 / sizeof(u32))
#define SIU_SFORM (0x008 / sizeof(u32))
#define SIU_CKCTL (0x00c / sizeof(u32))
#define SIU_TRDAT (0x010 / sizeof(u32))
#define SIU_STFIFO      (0x014 / sizeof(u32))
#define SIU_DPAK  (0x01c / sizeof(u32))
#define SIU_CKREV (0x020 / sizeof(u32))
#define SIU_EVNTC (0x028 / sizeof(u32))
#define SIU_SBCTL (0x040 / sizeof(u32))
#define SIU_SBPSET      (0x044 / sizeof(u32))
#define SIU_SBFSTS      (0x068 / sizeof(u32))
#define SIU_SBDVCA      (0x06c / sizeof(u32))
#define SIU_SBDVCB      (0x070 / sizeof(u32))
#define SIU_SBACTIV     (0x074 / sizeof(u32))
#define SIU_DMAIA (0x090 / sizeof(u32))
#define SIU_DMAIB (0x094 / sizeof(u32))
#define SIU_DMAOA (0x098 / sizeof(u32))
#define SIU_DMAOB (0x09c / sizeof(u32))
#define SIU_DMAML (0x0a0 / sizeof(u32))
#define SIU_SPSTS (0x0cc / sizeof(u32))
#define SIU_SPCTL (0x0d0 / sizeof(u32))
#define SIU_BRGASEL     (0x100 / sizeof(u32))
#define SIU_BRRA  (0x104 / sizeof(u32))
#define SIU_BRGBSEL     (0x108 / sizeof(u32))
#define SIU_BRRB  (0x10c / sizeof(u32))

extern struct snd_soc_platform siu_platform;
extern struct snd_soc_dai siu_i2s_dai;

int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card);
void siu_free_port(struct siu_port *port_info);

#endif

#endif /* SIU_H */

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