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/* SPDX-License-Identifier: GPL-2.0-only */
* i2sbus driver -- private definitions
* Copyright 2006 Johannes Berg <>
#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 "interface.h"
#include "../soundbus.h"
struct i2sbus_control {
struct list_head list;
struct macio_chip *macio;
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,
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,
/* 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 */