sound/aoa/soundbus/i2sbus/i2sbus.h

   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 #include <linux/completion.h>
  14
  15 #include <sound/pcm.h>
  16
  17 #include <asm/prom.h>
  18 #include <asm/pmac_feature.h>
  19 #include <asm/dbdma.h>
  20
  21 #include "i2sbus-interface.h"
  22 #include "../soundbus.h"
  23
  24 struct i2sbus_control {
  25         struct list_head list;
  26         struct macio_chip *macio;
  27 };
  28
  29 #define MAX_DBDMA_COMMANDS      32
  30
  31 struct dbdma_command_mem {
  32         dma_addr_t bus_addr;
  33         dma_addr_t bus_cmd_start;
  34         struct dbdma_cmd *cmds;
  35         void *space;
  36         int size;
  37         u32 running:1;
  38         u32 stopping:1;
  39 };
  40
  41 struct pcm_info {
  42         u32 created:1, /* has this direction been created with alsa? */
  43             active:1;  /* is this stream active? */
  44         /* runtime information */
  45         struct snd_pcm_substream *substream;
  46         int current_period;
  47         u32 frame_count;
  48         struct dbdma_command_mem dbdma_ring;
  49         volatile struct dbdma_regs __iomem *dbdma;
  50         struct completion *stop_completion;
  51 };
  52
  53 enum {
  54         aoa_resource_i2smmio = 0,
  55         aoa_resource_txdbdma,
  56         aoa_resource_rxdbdma,
  57 };
  58
  59 struct i2sbus_dev {
  60         struct soundbus_dev sound;
  61         struct macio_dev *macio;
  62         struct i2sbus_control *control;
  63         volatile struct i2s_interface_regs __iomem *intfregs;
  64
  65         struct resource resources[3];
  66         struct resource *allocated_resource[3];
  67         int interrupts[3];
  68         char rnames[3][32];
  69
  70         /* info about currently active substreams */
  71         struct pcm_info out, in;
  72         snd_pcm_format_t format;
  73         unsigned int rate;
  74
  75         /* list for a single controller */
  76         struct list_head item;
  77         /* number of bus on controller */
  78         int bus_number;
  79         /* for use by control layer */
  80         struct pmf_function *enable,
  81                             *cell_enable,
  82                             *cell_disable,
  83                             *clock_enable,
  84                             *clock_disable;
  85
  86         /* locks */
  87         /* spinlock for low-level interrupt locking */
  88         spinlock_t low_lock;
  89         /* mutex for high-level consistency */
  90         struct mutex lock;
  91 };
  92
  93 #define soundbus_dev_to_i2sbus_dev(sdev) \
  94                 container_of(sdev, struct i2sbus_dev, sound)
  95
  96 /* pcm specific functions */
  97 extern int
  98 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
  99                     struct codec_info *ci, void *data);
 100 extern void
 101 i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
 102 extern irqreturn_t
 103 i2sbus_tx_intr(int irq, void *devid);
 104 extern irqreturn_t
 105 i2sbus_rx_intr(int irq, void *devid);
 106
 107 extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
 108 extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
 109
 110 /* control specific functions */
 111 extern int i2sbus_control_init(struct macio_dev* dev,
 112                                struct i2sbus_control **c);
 113 extern void i2sbus_control_destroy(struct i2sbus_control *c);
 114 extern int i2sbus_control_add_dev(struct i2sbus_control *c,
 115                                   struct i2sbus_dev *i2sdev);
 116 extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
 117                                       struct i2sbus_dev *i2sdev);
 118 extern int i2sbus_control_enable(struct i2sbus_control *c,
 119                                  struct i2sbus_dev *i2sdev);
 120 extern int i2sbus_control_cell(struct i2sbus_control *c,
 121                                struct i2sbus_dev *i2sdev,
 122                                int enable);
 123 extern int i2sbus_control_clock(struct i2sbus_control *c,
 124                                 struct i2sbus_dev *i2sdev,
 125                                 int enable);
 126 #endif /* __I2SBUS_H */