LXR linux/sound/aoa/soundbus/i2sbus/i2sbus.h

   1/*
   2 * i2sbus driver -- private definitions
   3 *
   4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
   5 *
   6 * GPL v2, can be found in COPYING.
   7 */
   8#ifndef __I2SBUS_H
   9#define __I2SBUS_H
  10#include <linux/interrupt.h>
  11#include <linux/spinlock.h>
  12#include <linux/mutex.h>
  13#include <linux/completion.h>
  14
  15#include <sound/pcm.h>
  16
  17#include <asm/prom.h>
  18#include <asm/pmac_feature.h>
  19#include <asm/dbdma.h>
  20
  21#include "interface.h"
  22#include "../soundbus.h"
  23
  24struct i2sbus_control {
  25        struct list_head list;
  26        struct macio_chip *macio;
  27};
  28
  29#define MAX_DBDMA_COMMANDS      32
  30
  31struct dbdma_command_mem {
  32        dma_addr_t bus_addr;
  33        dma_addr_t bus_cmd_start;
  34        struct dbdma_cmd *cmds;
  35        void *space;
  36        int size;
  37        u32 running:1;
  38        u32 stopping:1;
  39};
  40
  41struct pcm_info {
  42        u32 created:1, /* has this direction been created with alsa? */
  43            active:1;  /* is this stream active? */
  44        /* runtime information */
  45        struct snd_pcm_substream *substream;
  46        int current_period;
  47        u32 frame_count;
  48        struct dbdma_command_mem dbdma_ring;
  49        volatile struct dbdma_regs __iomem *dbdma;
  50        struct completion *stop_completion;
  51};
  52
  53enum {
  54        aoa_resource_i2smmio = 0,
  55        aoa_resource_txdbdma,
  56        aoa_resource_rxdbdma,
  57};
  58
  59struct i2sbus_dev {
  60        struct soundbus_dev sound;
  61        struct macio_dev *macio;
  62        struct i2sbus_control *control;
  63        volatile struct i2s_interface_regs __iomem *intfregs;
  64
  65        struct resource resources[3];
  66        struct resource *allocated_resource[3];
  67        int interrupts[3];
  68        char rnames[3][32];
  69
  70        /* info about currently active substreams */
  71        struct pcm_info out, in;
  72        snd_pcm_format_t format;
  73        unsigned int rate;
  74
  75        /* list for a single controller */
  76        struct list_head item;
  77        /* number of bus on controller */
  78        int bus_number;
  79        /* for use by control layer */
  80        struct pmf_function *enable,
  81                            *cell_enable,
  82                            *cell_disable,
  83                            *clock_enable,
  84                            *clock_disable;
  85
  86        /* locks */
  87        /* spinlock for low-level interrupt locking */
  88        spinlock_t low_lock;
  89        /* mutex for high-level consistency */
  90        struct mutex lock;
  91};
  92
  93#define soundbus_dev_to_i2sbus_dev(sdev) \
  94                container_of(sdev, struct i2sbus_dev, sound)
  95
  96/* pcm specific functions */
  97extern int
  98i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
  99                    struct codec_info *ci, void *data);
 100extern void
 101i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
 102extern irqreturn_t
 103i2sbus_tx_intr(int irq, void *devid);
 104extern irqreturn_t
 105i2sbus_rx_intr(int irq, void *devid);
 106
 107extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
 108extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
 109
 110/* control specific functions */
 111extern int i2sbus_control_init(struct macio_dev* dev,
 112                               struct i2sbus_control **c);
 113extern void i2sbus_control_destroy(struct i2sbus_control *c);
 114extern int i2sbus_control_add_dev(struct i2sbus_control *c,
 115                                  struct i2sbus_dev *i2sdev);
 116extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
 117                                      struct i2sbus_dev *i2sdev);
 118extern int i2sbus_control_enable(struct i2sbus_control *c,
 119                                 struct i2sbus_dev *i2sdev);
 120extern int i2sbus_control_cell(struct i2sbus_control *c,
 121                               struct i2sbus_dev *i2sdev,
 122                               int enable);
 123extern int i2sbus_control_clock(struct i2sbus_control *c,
 124                                struct i2sbus_dev *i2sdev,
 125                                int enable);
 126#endif /* __I2SBUS_H */
 127