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

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * i2sbus driver -- private definitions
   4 *
   5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
   6 */
   7#ifndef __I2SBUS_H
   8#define __I2SBUS_H
   9#include <linux/interrupt.h>
  10#include <linux/spinlock.h>
  11#include <linux/mutex.h>
  12#include <linux/completion.h>
  13
  14#include <sound/pcm.h>
  15
  16#include <asm/prom.h>
  17#include <asm/pmac_feature.h>
  18#include <asm/dbdma.h>
  19
  20#include "interface.h"
  21#include "../soundbus.h"
  22
  23struct i2sbus_control {
  24        struct list_head list;
  25        struct macio_chip *macio;
  26};
  27
  28#define MAX_DBDMA_COMMANDS      32
  29
  30struct dbdma_command_mem {
  31        dma_addr_t bus_addr;
  32        dma_addr_t bus_cmd_start;
  33        struct dbdma_cmd *cmds;
  34        void *space;
  35        int size;
  36        u32 running:1;
  37        u32 stopping:1;
  38};
  39
  40struct pcm_info {
  41        u32 created:1, /* has this direction been created with alsa? */
  42            active:1;  /* is this stream active? */
  43        /* runtime information */
  44        struct snd_pcm_substream *substream;
  45        int current_period;
  46        u32 frame_count;
  47        struct dbdma_command_mem dbdma_ring;
  48        volatile struct dbdma_regs __iomem *dbdma;
  49        struct completion *stop_completion;
  50};
  51
  52enum {
  53        aoa_resource_i2smmio = 0,
  54        aoa_resource_txdbdma,
  55        aoa_resource_rxdbdma,
  56};
  57
  58struct i2sbus_dev {
  59        struct soundbus_dev sound;
  60        struct macio_dev *macio;
  61        struct i2sbus_control *control;
  62        volatile struct i2s_interface_regs __iomem *intfregs;
  63
  64        struct resource resources[3];
  65        struct resource *allocated_resource[3];
  66        int interrupts[3];
  67        char rnames[3][32];
  68
  69        /* info about currently active substreams */
  70        struct pcm_info out, in;
  71        snd_pcm_format_t format;
  72        unsigned int rate;
  73
  74        /* list for a single controller */
  75        struct list_head item;
  76        /* number of bus on controller */
  77        int bus_number;
  78        /* for use by control layer */
  79        struct pmf_function *enable,
  80                            *cell_enable,
  81                            *cell_disable,
  82                            *clock_enable,
  83                            *clock_disable;
  84
  85        /* locks */
  86        /* spinlock for low-level interrupt locking */
  87        spinlock_t low_lock;
  88        /* mutex for high-level consistency */
  89        struct mutex lock;
  90};
  91
  92#define soundbus_dev_to_i2sbus_dev(sdev) \
  93                container_of(sdev, struct i2sbus_dev, sound)
  94
  95/* pcm specific functions */
  96extern int
  97i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
  98                    struct codec_info *ci, void *data);
  99extern void
 100i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
 101extern irqreturn_t
 102i2sbus_tx_intr(int irq, void *devid);
 103extern irqreturn_t
 104i2sbus_rx_intr(int irq, void *devid);
 105
 106extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
 107extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
 108
 109/* control specific functions */
 110extern int i2sbus_control_init(struct macio_dev* dev,
 111                               struct i2sbus_control **c);
 112extern void i2sbus_control_destroy(struct i2sbus_control *c);
 113extern int i2sbus_control_add_dev(struct i2sbus_control *c,
 114                                  struct i2sbus_dev *i2sdev);
 115extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
 116                                      struct i2sbus_dev *i2sdev);
 117extern int i2sbus_control_enable(struct i2sbus_control *c,
 118                                 struct i2sbus_dev *i2sdev);
 119extern int i2sbus_control_cell(struct i2sbus_control *c,
 120                               struct i2sbus_dev *i2sdev,
 121                               int enable);
 122extern int i2sbus_control_clock(struct i2sbus_control *c,
 123                                struct i2sbus_dev *i2sdev,
 124                                int enable);
 125#endif /* __I2SBUS_H */
 126