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