1/*
2 * i2sbus driver -- private definitions
3 *
4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
5 *
6 * GPL v2, can be found in COPYING.
7 */
8#ifndef __I2SBUS_H
9#define __I2SBUS_H
10#include <linux/interrupt.h>
11#include <linux/spinlock.h>
12#include <linux/mutex.h>
13#include <linux/completion.h>
14
15#include <sound/pcm.h>
16
17#include <asm/prom.h>
18#include <asm/pmac_feature.h>
19#include <asm/dbdma.h>
20
21#include "interface.h"
22#include "../soundbus.h"
23
24struct i2sbus_control {
25	struct list_head list;
26	struct macio_chip *macio;
27};
28
29#define MAX_DBDMA_COMMANDS	32
30
31struct dbdma_command_mem {
32	dma_addr_t bus_addr;
33	dma_addr_t bus_cmd_start;
34	struct dbdma_cmd *cmds;
35	void *space;
36	int size;
37	u32 running:1;
38	u32 stopping:1;
39};
40
41struct pcm_info {
42	u32 created:1, /* has this direction been created with alsa? */
43	    active:1;  /* is this stream active? */
44	/* runtime information */
45	struct snd_pcm_substream *substream;
46	int current_period;
47	u32 frame_count;
48	struct dbdma_command_mem dbdma_ring;
49	volatile struct dbdma_regs __iomem *dbdma;
50	struct completion *stop_completion;
51};
52
53enum {
54	aoa_resource_i2smmio = 0,
55	aoa_resource_txdbdma,
56	aoa_resource_rxdbdma,
57};
58
59struct i2sbus_dev {
60	struct soundbus_dev sound;
61	struct macio_dev *macio;
62	struct i2sbus_control *control;
63	volatile struct i2s_interface_regs __iomem *intfregs;
64
65	struct resource resources[3];
66	struct resource *allocated_resource[3];
67	int interrupts[3];
68	char rnames[3][32];
69
70	/* info about currently active substreams */
71	struct pcm_info out, in;
72	snd_pcm_format_t format;
73	unsigned int rate;
74
75	/* list for a single controller */
76	struct list_head item;
77	/* number of bus on controller */
78	int bus_number;
79	/* for use by control layer */
80	struct pmf_function *enable,
81			    *cell_enable,
82			    *cell_disable,
83			    *clock_enable,
84			    *clock_disable;
85
86	/* locks */
87	/* spinlock for low-level interrupt locking */
88	spinlock_t low_lock;
89	/* mutex for high-level consistency */
90	struct mutex lock;
91};
92
93#define soundbus_dev_to_i2sbus_dev(sdev) \
94		container_of(sdev, struct i2sbus_dev, sound)
95
96/* pcm specific functions */
97extern int
98i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
99		    struct codec_info *ci, void *data);
100extern void
101i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
102extern irqreturn_t
103i2sbus_tx_intr(int irq, void *devid);
104extern irqreturn_t
105i2sbus_rx_intr(int irq, void *devid);
106
107extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
108extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
109
110/* control specific functions */
111extern int i2sbus_control_init(struct macio_dev* dev,
112			       struct i2sbus_control **c);
113extern void i2sbus_control_destroy(struct i2sbus_control *c);
114extern int i2sbus_control_add_dev(struct i2sbus_control *c,
115				  struct i2sbus_dev *i2sdev);
116extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
117				      struct i2sbus_dev *i2sdev);
118extern int i2sbus_control_enable(struct i2sbus_control *c,
119				 struct i2sbus_dev *i2sdev);
120extern int i2sbus_control_cell(struct i2sbus_control *c,
121			       struct i2sbus_dev *i2sdev,
122			       int enable);
123extern int i2sbus_control_clock(struct i2sbus_control *c,
124				struct i2sbus_dev *i2sdev,
125				int enable);
126#endif /* __I2SBUS_H */
127