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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * i2sbus driver -- private definitions4 *5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>6 */7#ifndef __I2SBUS_H8#define __I2SBUS_H9#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 22struct i2sbus_control {23 struct list_head list;24 struct macio_chip *macio;25};26 27#define MAX_DBDMA_COMMANDS 3228 29struct 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 39struct 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 51enum {52 aoa_resource_i2smmio = 0,53 aoa_resource_txdbdma,54 aoa_resource_rxdbdma,55};56 57struct 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 */95extern int96i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,97 struct codec_info *ci, void *data);98extern void99i2sbus_detach_codec(struct soundbus_dev *dev, void *data);100extern irqreturn_t101i2sbus_tx_intr(int irq, void *devid);102extern irqreturn_t103i2sbus_rx_intr(int irq, void *devid);104 105extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);106extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);107 108/* control specific functions */109extern int i2sbus_control_init(struct macio_dev* dev,110 struct i2sbus_control **c);111extern void i2sbus_control_destroy(struct i2sbus_control *c);112extern int i2sbus_control_add_dev(struct i2sbus_control *c,113 struct i2sbus_dev *i2sdev);114extern void i2sbus_control_remove_dev(struct i2sbus_control *c,115 struct i2sbus_dev *i2sdev);116extern int i2sbus_control_enable(struct i2sbus_control *c,117 struct i2sbus_dev *i2sdev);118extern int i2sbus_control_cell(struct i2sbus_control *c,119 struct i2sbus_dev *i2sdev,120 int enable);121extern int i2sbus_control_clock(struct i2sbus_control *c,122 struct i2sbus_dev *i2sdev,123 int enable);124#endif /* __I2SBUS_H */125