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 */