sound/aoa/soundbus/i2sbus/i2sbus.h

   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/prom.h>
  17 #include <asm/pmac_feature.h>
  18 #include <asm/dbdma.h>
  19
  20 #include "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         u32 stopping:1;
  38 };
  39
  40 struct pcm_info {
  41         u32 created:1, /* has this direction been created with alsa? */
  42             active:1;  /* is this stream active? */
  43         /* runtime information */
  44         struct snd_pcm_substream *substream;
  45         int current_period;
  46         u32 frame_count;
  47         struct dbdma_command_mem dbdma_ring;
  48         volatile struct dbdma_regs __iomem *dbdma;
  49         struct completion *stop_completion;
  50 };
  51
  52 enum {
  53         aoa_resource_i2smmio = 0,
  54         aoa_resource_txdbdma,
  55         aoa_resource_rxdbdma,
  56 };
  57
  58 struct i2sbus_dev {
  59         struct soundbus_dev sound;
  60         struct macio_dev *macio;
  61         struct i2sbus_control *control;
  62         volatile struct i2s_interface_regs __iomem *intfregs;
  63
  64         struct resource resources[3];
  65         struct resource *allocated_resource[3];
  66         int interrupts[3];
  67         char rnames[3][32];
  68
  69         /* info about currently active substreams */
  70         struct pcm_info out, in;
  71         snd_pcm_format_t format;
  72         unsigned int rate;
  73
  74         /* list for a single controller */
  75         struct list_head item;
  76         /* number of bus on controller */
  77         int bus_number;
  78         /* for use by control layer */
  79         struct pmf_function *enable,
  80                             *cell_enable,
  81                             *cell_disable,
  82                             *clock_enable,
  83                             *clock_disable;
  84
  85         /* locks */
  86         /* spinlock for low-level interrupt locking */
  87         spinlock_t low_lock;
  88         /* mutex for high-level consistency */
  89         struct mutex lock;
  90 };
  91
  92 #define soundbus_dev_to_i2sbus_dev(sdev) \
  93                 container_of(sdev, struct i2sbus_dev, sound)
  94
  95 /* pcm specific functions */
  96 extern int
  97 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
  98                     struct codec_info *ci, void *data);
  99 extern void
 100 i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
 101 extern irqreturn_t
 102 i2sbus_tx_intr(int irq, void *devid);
 103 extern irqreturn_t
 104 i2sbus_rx_intr(int irq, void *devid);
 105
 106 extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
 107 extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
 108
 109 /* control specific functions */
 110 extern int i2sbus_control_init(struct macio_dev* dev,
 111                                struct i2sbus_control **c);
 112 extern void i2sbus_control_destroy(struct i2sbus_control *c);
 113 extern int i2sbus_control_add_dev(struct i2sbus_control *c,
 114                                   struct i2sbus_dev *i2sdev);
 115 extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
 116                                       struct i2sbus_dev *i2sdev);
 117 extern int i2sbus_control_enable(struct i2sbus_control *c,
 118                                  struct i2sbus_dev *i2sdev);
 119 extern int i2sbus_control_cell(struct i2sbus_control *c,
 120                                struct i2sbus_dev *i2sdev,
 121                                int enable);
 122 extern int i2sbus_control_clock(struct i2sbus_control *c,
 123                                 struct i2sbus_dev *i2sdev,
 124                                 int enable);
 125 #endif /* __I2SBUS_H */