126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* i2sbus driver -- private definitions
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*/
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#ifndef __I2SBUS_H
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#define __I2SBUS_H
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/completion.h>
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#include <sound/pcm.h>
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#include <asm/prom.h>
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#include <asm/pmac_feature.h>
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#include <asm/dbdma.h>
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#include "interface.h"
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#include "../soundbus.h"
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struct i2sbus_control {
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struct list_head list;
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struct macio_chip *macio;
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};
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#define MAX_DBDMA_COMMANDS 32
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struct dbdma_command_mem {
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dma_addr_t bus_addr;
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dma_addr_t bus_cmd_start;
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struct dbdma_cmd *cmds;
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void *space;
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int size;
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u32 running:1;
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u32 stopping:1;
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};
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struct pcm_info {
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u32 created:1, /* has this direction been created with alsa? */
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active:1; /* is this stream active? */
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/* runtime information */
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struct snd_pcm_substream *substream;
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int current_period;
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u32 frame_count;
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struct dbdma_command_mem dbdma_ring;
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volatile struct dbdma_regs __iomem *dbdma;
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struct completion *stop_completion;
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};
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enum {
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aoa_resource_i2smmio = 0,
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aoa_resource_txdbdma,
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aoa_resource_rxdbdma,
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};
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struct i2sbus_dev {
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struct soundbus_dev sound;
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struct macio_dev *macio;
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struct i2sbus_control *control;
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volatile struct i2s_interface_regs __iomem *intfregs;
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struct resource resources[3];
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struct resource *allocated_resource[3];
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int interrupts[3];
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char rnames[3][32];
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/* info about currently active substreams */
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struct pcm_info out, in;
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snd_pcm_format_t format;
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unsigned int rate;
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/* list for a single controller */
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struct list_head item;
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/* number of bus on controller */
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int bus_number;
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/* for use by control layer */
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struct pmf_function *enable,
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*cell_enable,
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*cell_disable,
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*clock_enable,
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*clock_disable;
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/* locks */
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/* spinlock for low-level interrupt locking */
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spinlock_t low_lock;
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/* mutex for high-level consistency */
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struct mutex lock;
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};
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#define soundbus_dev_to_i2sbus_dev(sdev) \
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container_of(sdev, struct i2sbus_dev, sound)
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/* pcm specific functions */
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extern int
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i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
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struct codec_info *ci, void *data);
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extern void
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i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
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extern irqreturn_t
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i2sbus_tx_intr(int irq, void *devid);
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extern irqreturn_t
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i2sbus_rx_intr(int irq, void *devid);
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extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
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extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
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/* control specific functions */
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extern int i2sbus_control_init(struct macio_dev* dev,
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struct i2sbus_control **c);
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extern void i2sbus_control_destroy(struct i2sbus_control *c);
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extern int i2sbus_control_add_dev(struct i2sbus_control *c,
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struct i2sbus_dev *i2sdev);
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extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
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struct i2sbus_dev *i2sdev);
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extern int i2sbus_control_enable(struct i2sbus_control *c,
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struct i2sbus_dev *i2sdev);
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extern int i2sbus_control_cell(struct i2sbus_control *c,
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struct i2sbus_dev *i2sdev,
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int enable);
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extern int i2sbus_control_clock(struct i2sbus_control *c,
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struct i2sbus_dev *i2sdev,
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int enable);
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#endif /* __I2SBUS_H */
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