cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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i2sbus.h (3253B)

      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
     23struct i2sbus_control {
     24	struct list_head list;
     25	struct macio_chip *macio;
     26};
     27
     28#define MAX_DBDMA_COMMANDS	32
     29
     30struct 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
     40struct 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
     52enum {
     53	aoa_resource_i2smmio = 0,
     54	aoa_resource_txdbdma,
     55	aoa_resource_rxdbdma,
     56};
     57
     58struct 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 */
     96extern int
     97i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
     98		    struct codec_info *ci, void *data);
     99extern void
    100i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
    101extern irqreturn_t
    102i2sbus_tx_intr(int irq, void *devid);
    103extern irqreturn_t
    104i2sbus_rx_intr(int irq, void *devid);
    105
    106extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev);
    107extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev);
    108
    109/* control specific functions */
    110extern int i2sbus_control_init(struct macio_dev* dev,
    111			       struct i2sbus_control **c);
    112extern void i2sbus_control_destroy(struct i2sbus_control *c);
    113extern int i2sbus_control_add_dev(struct i2sbus_control *c,
    114				  struct i2sbus_dev *i2sdev);
    115extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
    116				      struct i2sbus_dev *i2sdev);
    117extern int i2sbus_control_enable(struct i2sbus_control *c,
    118				 struct i2sbus_dev *i2sdev);
    119extern int i2sbus_control_cell(struct i2sbus_control *c,
    120			       struct i2sbus_dev *i2sdev,
    121			       int enable);
    122extern int i2sbus_control_clock(struct i2sbus_control *c,
    123				struct i2sbus_dev *i2sdev,
    124				int enable);
    125#endif /* __I2SBUS_H */