root/sound/aoa/soundbus/i2sbus/i2sbus.h

INCLUDED FROM

/*
 * i2sbus driver -- private definitions
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * GPL v2, can be found in COPYING.
 */
#ifndef __I2SBUS_H
#define __I2SBUS_H
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/completion.h>

#include <sound/pcm.h>

#include <asm/prom.h>
#include <asm/pmac_feature.h>
#include <asm/dbdma.h>

#include "i2sbus-interface.h"
#include "../soundbus.h"

struct i2sbus_control {
        struct list_head list;
        struct macio_chip *macio;
};

#define MAX_DBDMA_COMMANDS      32

struct dbdma_command_mem {
        dma_addr_t bus_addr;
        dma_addr_t bus_cmd_start;
        struct dbdma_cmd *cmds;
        void *space;
        int size;
        u32 running:1;
        u32 stopping:1;
};

struct pcm_info {
        u32 created:1, /* has this direction been created with alsa? */
            active:1;  /* is this stream active? */
        /* runtime information */
        struct snd_pcm_substream *substream;
        int current_period;
        u32 frame_count;
        struct dbdma_command_mem dbdma_ring;
        volatile struct dbdma_regs __iomem *dbdma;
        struct completion *stop_completion;
};

enum {
        aoa_resource_i2smmio = 0,
        aoa_resource_txdbdma,
        aoa_resource_rxdbdma,
};

struct i2sbus_dev {
        struct soundbus_dev sound;
        struct macio_dev *macio;
        struct i2sbus_control *control;
        volatile struct i2s_interface_regs __iomem *intfregs;

        struct resource resources[3];
        struct resource *allocated_resource[3];
        int interrupts[3];
        char rnames[3][32];

        /* info about currently active substreams */
        struct pcm_info out, in;
        snd_pcm_format_t format;
        unsigned int rate;

        /* list for a single controller */
        struct list_head item;
        /* number of bus on controller */
        int bus_number;
        /* for use by control layer */
        struct pmf_function *enable,
                            *cell_enable,
                            *cell_disable,
                            *clock_enable,
                            *clock_disable;

        /* locks */
        /* spinlock for low-level interrupt locking */
        spinlock_t low_lock;
        /* mutex for high-level consistency */
        struct mutex lock;
};

#define soundbus_dev_to_i2sbus_dev(sdev) \
                container_of(sdev, struct i2sbus_dev, sound)

/* pcm specific functions */
extern int
i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
                    struct codec_info *ci, void *data);
extern void
i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
extern irqreturn_t
i2sbus_tx_intr(int irq, void *devid);
extern irqreturn_t
i2sbus_rx_intr(int irq, void *devid);

extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);

/* control specific functions */
extern int i2sbus_control_init(struct macio_dev* dev,
                               struct i2sbus_control **c);
extern void i2sbus_control_destroy(struct i2sbus_control *c);
extern int i2sbus_control_add_dev(struct i2sbus_control *c,
                                  struct i2sbus_dev *i2sdev);
extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
                                      struct i2sbus_dev *i2sdev);
extern int i2sbus_control_enable(struct i2sbus_control *c,
                                 struct i2sbus_dev *i2sdev);
extern int i2sbus_control_cell(struct i2sbus_control *c,
                               struct i2sbus_dev *i2sdev,
                               int enable);
extern int i2sbus_control_clock(struct i2sbus_control *c,
                                struct i2sbus_dev *i2sdev,
                                int enable);
#endif /* __I2SBUS_H */