xref: /linux/sound/aoa/soundbus/i2sbus/i2sbus.h (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
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 
22 struct i2sbus_control {
23 	struct list_head list;
24 	struct macio_chip *macio;
25 };
26 
27 #define MAX_DBDMA_COMMANDS	32
28 
29 struct 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 
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 	struct completion *stop_completion;
49 };
50 
51 enum {
52 	aoa_resource_i2smmio = 0,
53 	aoa_resource_txdbdma,
54 	aoa_resource_rxdbdma,
55 };
56 
57 struct 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 */
95 extern int
96 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
97 		    struct codec_info *ci, void *data);
98 extern void
99 i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
100 extern irqreturn_t
101 i2sbus_tx_intr(int irq, void *devid);
102 extern irqreturn_t
103 i2sbus_rx_intr(int irq, void *devid);
104 
105 extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
106 extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
107 
108 /* control specific functions */
109 extern int i2sbus_control_init(struct macio_dev* dev,
110 			       struct i2sbus_control **c);
111 extern void i2sbus_control_destroy(struct i2sbus_control *c);
112 extern int i2sbus_control_add_dev(struct i2sbus_control *c,
113 				  struct i2sbus_dev *i2sdev);
114 extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
115 				      struct i2sbus_dev *i2sdev);
116 extern int i2sbus_control_enable(struct i2sbus_control *c,
117 				 struct i2sbus_dev *i2sdev);
118 extern int i2sbus_control_cell(struct i2sbus_control *c,
119 			       struct i2sbus_dev *i2sdev,
120 			       int enable);
121 extern int i2sbus_control_clock(struct i2sbus_control *c,
122 				struct i2sbus_dev *i2sdev,
123 				int enable);
124 #endif /* __I2SBUS_H */
125