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