1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * i2sbus driver -- private definitions
5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
9 #include <linux/interrupt.h>
10 #include <linux/spinlock.h>
11 #include <linux/mutex.h>
12 #include <linux/completion.h>
14 #include <sound/pcm.h>
16 #include <asm/pmac_feature.h>
17 #include <asm/dbdma.h>
19 #include "interface.h"
20 #include "../soundbus.h"
22 struct i2sbus_control {
23 struct list_head list;
24 struct macio_chip *macio;
27 #define MAX_DBDMA_COMMANDS 32
29 struct dbdma_command_mem {
31 dma_addr_t bus_cmd_start;
32 struct dbdma_cmd *cmds;
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;
46 struct dbdma_command_mem dbdma_ring;
47 volatile struct dbdma_regs __iomem *dbdma;
48 struct completion *stop_completion;
52 aoa_resource_i2smmio = 0,
58 struct soundbus_dev sound;
59 struct macio_dev *macio;
60 struct i2sbus_control *control;
61 volatile struct i2s_interface_regs __iomem *intfregs;
63 struct resource resources[3];
64 struct resource *allocated_resource[3];
68 /* info about currently active substreams */
69 struct pcm_info out, in;
70 snd_pcm_format_t format;
73 /* list for a single controller */
74 struct list_head item;
75 /* number of bus on controller */
77 /* for use by control layer */
78 struct pmf_function *enable,
85 /* spinlock for low-level interrupt locking */
87 /* mutex for high-level consistency */
91 #define soundbus_dev_to_i2sbus_dev(sdev) \
92 container_of(sdev, struct i2sbus_dev, sound)
94 /* pcm specific functions */
96 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
97 struct codec_info *ci, void *data);
99 i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
101 i2sbus_tx_intr(int irq, void *devid);
103 i2sbus_rx_intr(int irq, void *devid);
105 extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
106 extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
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,
121 extern int i2sbus_control_clock(struct i2sbus_control *c,
122 struct i2sbus_dev *i2sdev,
124 #endif /* __I2SBUS_H */