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
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