xref: /linux/sound/aoa/soundbus/i2sbus/i2sbus.h (revision 14b42963f64b98ab61fa9723c03d71aa5ef4f862)
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 
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 "i2sbus-interface.h"
21 #include "../soundbus.h"
22 
23 struct i2sbus_control {
24 	struct list_head list;
25 	struct macio_chip *macio;
26 };
27 
28 #define MAX_DBDMA_COMMANDS	32
29 
30 struct 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 };
38 
39 struct 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 };
49 
50 enum {
51 	aoa_resource_i2smmio = 0,
52 	aoa_resource_txdbdma,
53 	aoa_resource_rxdbdma,
54 };
55 
56 struct i2sbus_dev {
57 	struct soundbus_dev sound;
58 	struct macio_dev *macio;
59 	struct i2sbus_control *control;
60 	volatile struct i2s_interface_regs __iomem *intfregs;
61 
62 	struct resource resources[3];
63 	struct resource *allocated_resource[3];
64 	int interrupts[3];
65 	char rnames[3][32];
66 
67 	/* info about currently active substreams */
68 	struct pcm_info out, in;
69 	snd_pcm_format_t format;
70 	unsigned int rate;
71 
72 	/* list for a single controller */
73 	struct list_head item;
74 	/* number of bus on controller */
75 	int bus_number;
76 	/* for use by control layer */
77 	struct pmf_function *enable,
78 			    *cell_enable,
79 			    *cell_disable,
80 			    *clock_enable,
81 			    *clock_disable;
82 
83 	/* locks */
84 	/* spinlock for low-level interrupt locking */
85 	spinlock_t low_lock;
86 	/* mutex for high-level consistency */
87 	struct mutex lock;
88 };
89 
90 #define soundbus_dev_to_i2sbus_dev(sdev) \
91 		container_of(sdev, struct i2sbus_dev, sound)
92 
93 /* pcm specific functions */
94 extern int
95 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
96 		    struct codec_info *ci, void *data);
97 extern void
98 i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
99 extern irqreturn_t
100 i2sbus_tx_intr(int irq, void *devid, struct pt_regs *regs);
101 extern irqreturn_t
102 i2sbus_rx_intr(int irq, void *devid, struct pt_regs *regs);
103 
104 /* control specific functions */
105 extern int i2sbus_control_init(struct macio_dev* dev,
106 			       struct i2sbus_control **c);
107 extern void i2sbus_control_destroy(struct i2sbus_control *c);
108 extern int i2sbus_control_add_dev(struct i2sbus_control *c,
109 				  struct i2sbus_dev *i2sdev);
110 extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
111 				      struct i2sbus_dev *i2sdev);
112 extern int i2sbus_control_enable(struct i2sbus_control *c,
113 				 struct i2sbus_dev *i2sdev);
114 extern int i2sbus_control_cell(struct i2sbus_control *c,
115 			       struct i2sbus_dev *i2sdev,
116 			       int enable);
117 extern int i2sbus_control_clock(struct i2sbus_control *c,
118 				struct i2sbus_dev *i2sdev,
119 				int enable);
120 #endif /* __I2SBUS_H */
121