cregit-Linux how code gets into the kernel

Release 4.12 include/sound/vx_core.h

Directory: include/sound
/*
 * Driver for Digigram VX soundcards
 *
 * Hardware core part
 *
 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#ifndef __SOUND_VX_COMMON_H

#define __SOUND_VX_COMMON_H

#include <sound/pcm.h>
#include <sound/hwdep.h>
#include <linux/interrupt.h>

struct firmware;
struct device;


#define VX_DRIVER_VERSION	0x010000	
/* 1.0.0 */

/*
 */

#define SIZE_MAX_CMD    0x10

#define SIZE_MAX_STATUS 0x10


struct vx_rmh {
	
u16	LgCmd;		/* length of the command to send (WORDs) */
	
u16	LgStat;		/* length of the status received (WORDs) */
	
u32	Cmd[SIZE_MAX_CMD];
	
u32	Stat[SIZE_MAX_STATUS];
	
u16	DspStat;	/* status type, RMP_SSIZE_XXX */
};
	

typedef u64 pcx_time_t;


#define VX_MAX_PIPES	16

#define VX_MAX_PERIODS	32

#define VX_MAX_CODECS	2


struct vx_ibl_info {
	
int size;	/* the current IBL size (0 = query) in bytes */
	
int max_size;	/* max. IBL size in bytes */
	
int min_size;	/* min. IBL size in bytes */
	
int granularity;	/* granularity */
};


struct vx_pipe {
	
int number;
	
unsigned int is_capture: 1;
	
unsigned int data_mode: 1;
	
unsigned int running: 1;
	
unsigned int prepared: 1;
	
int channels;
	
unsigned int differed_type;
	
pcx_time_t pcx_time;
	
struct snd_pcm_substream *substream;

	
int hbuf_size;		/* H-buffer size in bytes */
	
int buffer_bytes;	/* the ALSA pcm buffer size in bytes */
	
int period_bytes;	/* the ALSA pcm period size in bytes */
	
int hw_ptr;		/* the current hardware pointer in bytes */
	
int position;		/* the current position in frames (playback only) */
	
int transferred;	/* the transferred size (per period) in frames */
	
int align;		/* size of alignment */
	
u64 cur_count;		/* current sample position (for playback) */

	
unsigned int references;     /* an output pipe may be used for monitoring and/or playback */
	
struct vx_pipe *monitoring_pipe;  /* pointer to the monitoring pipe (capture pipe only)*/
};

struct vx_core;


struct snd_vx_ops {
	/* low-level i/o */
	
unsigned char (*in8)(struct vx_core *chip, int reg);
	
unsigned int (*in32)(struct vx_core *chip, int reg);
	
void (*out8)(struct vx_core *chip, int reg, unsigned char val);
	
void (*out32)(struct vx_core *chip, int reg, unsigned int val);
	/* irq */
	
int (*test_and_ack)(struct vx_core *chip);
	
void (*validate_irq)(struct vx_core *chip, int enable);
	/* codec */
	
void (*write_codec)(struct vx_core *chip, int codec, unsigned int data);
	
void (*akm_write)(struct vx_core *chip, int reg, unsigned int data);
	
void (*reset_codec)(struct vx_core *chip);
	
void (*change_audio_source)(struct vx_core *chip, int src);
	
void (*set_clock_source)(struct vx_core *chp, int src);
	/* chip init */
	
int (*load_dsp)(struct vx_core *chip, int idx, const struct firmware *fw);
	
void (*reset_dsp)(struct vx_core *chip);
	
void (*reset_board)(struct vx_core *chip, int cold_reset);
	
int (*add_controls)(struct vx_core *chip);
	/* pcm */
	
void (*dma_write)(struct vx_core *chip, struct snd_pcm_runtime *runtime,
			  struct vx_pipe *pipe, int count);
	
void (*dma_read)(struct vx_core *chip, struct snd_pcm_runtime *runtime,
			  struct vx_pipe *pipe, int count);
};


struct snd_vx_hardware {
	
const char *name;
	
int type;	/* VX_TYPE_XXX */

	/* hardware specs */
	
unsigned int num_codecs;
	
unsigned int num_ins;
	
unsigned int num_outs;
	
unsigned int output_level_max;
	
const unsigned int *output_level_db_scale;
};

/* hwdep id string */

#define SND_VX_HWDEP_ID		"VX Loader"

/* hardware type */
enum {
	/* VX222 PCI */
	
VX_TYPE_BOARD,		/* old VX222 PCI */
	
VX_TYPE_V2,		/* VX222 V2 PCI */
	
VX_TYPE_MIC,		/* VX222 Mic PCI */
	/* VX-pocket */
	
VX_TYPE_VXPOCKET,	/* VXpocket V2 */
	
VX_TYPE_VXP440,		/* VXpocket 440 */
	
VX_TYPE_NUMS
};

/* chip status */
enum {
	
VX_STAT_XILINX_LOADED	= (1 << 0),	/* devices are registered */
	
VX_STAT_DEVICE_INIT	= (1 << 1),	/* devices are registered */
	
VX_STAT_CHIP_INIT	= (1 << 2),	/* all operational */
	
VX_STAT_IN_SUSPEND	= (1 << 10),	/* in suspend phase */
	
VX_STAT_IS_STALE	= (1 << 15)	/* device is stale */
};

/* min/max values for analog output for old codecs */

#define VX_ANALOG_OUT_LEVEL_MAX		0xe3


struct vx_core {
	/* ALSA stuff */
	
struct snd_card *card;
	
struct snd_pcm *pcm[VX_MAX_CODECS];
	
int type;	/* VX_TYPE_XXX */

	
int irq;
	/* ports are defined externally */

	/* low-level functions */
	
struct snd_vx_hardware *hw;
	
struct snd_vx_ops *ops;

	
struct mutex lock;

	
unsigned int chip_status;
	
unsigned int pcm_running;

	
struct device *dev;
	
struct snd_hwdep *hwdep;

	
struct vx_rmh irq_rmh;	/* RMH used in interrupts */

	
unsigned int audio_info; /* see VX_AUDIO_INFO */
	
unsigned int audio_ins;
	
unsigned int audio_outs;
	
struct vx_pipe **playback_pipes;
	
struct vx_pipe **capture_pipes;

	/* clock and audio sources */
	
unsigned int audio_source;	/* current audio input source */
	
unsigned int audio_source_target;
	
unsigned int clock_mode;	/* clock mode (VX_CLOCK_MODE_XXX) */
	
unsigned int clock_source;	/* current clock source (INTERNAL_QUARTZ or UER_SYNC) */
	
unsigned int freq;		/* current frequency */
	
unsigned int freq_detected;	/* detected frequency from digital in */
	
unsigned int uer_detected;	/* VX_UER_MODE_XXX */
	
unsigned int uer_bits;	/* IEC958 status bits */
	
struct vx_ibl_info ibl;	/* IBL information */

	/* mixer setting */
	
int output_level[VX_MAX_CODECS][2];	/* analog output level */
	
int audio_gain[2][4];			/* digital audio level (playback/capture) */
	
unsigned char audio_active[4];		/* mute/unmute on digital playback */
	
int audio_monitor[4];			/* playback hw-monitor level */
	
unsigned char audio_monitor_active[4];	/* playback hw-monitor mute/unmute */

	
struct mutex mixer_mutex;

	
const struct firmware *firmware[4]; /* loaded firmware data */
};


/*
 * constructor
 */
struct vx_core *snd_vx_create(struct snd_card *card, struct snd_vx_hardware *hw,
			      struct snd_vx_ops *ops, int extra_size);
int snd_vx_setup_firmware(struct vx_core *chip);
int snd_vx_load_boot_image(struct vx_core *chip, const struct firmware *dsp);
int snd_vx_dsp_boot(struct vx_core *chip, const struct firmware *dsp);
int snd_vx_dsp_load(struct vx_core *chip, const struct firmware *dsp);

void snd_vx_free_firmware(struct vx_core *chip);

/*
 * interrupt handler; exported for pcmcia
 */
irqreturn_t snd_vx_irq_handler(int irq, void *dev);
irqreturn_t snd_vx_threaded_irq_handler(int irq, void *dev);

/*
 * lowlevel functions
 */

static inline int vx_test_and_ack(struct vx_core *chip) { return chip->ops->test_and_ack(chip); }

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static inline void vx_validate_irq(struct vx_core *chip, int enable) { chip->ops->validate_irq(chip, enable); }

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static inline unsigned char snd_vx_inb(struct vx_core *chip, int reg) { return chip->ops->in8(chip, reg); }

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static inline unsigned int snd_vx_inl(struct vx_core *chip, int reg) { return chip->ops->in32(chip, reg); }

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static inline void snd_vx_outb(struct vx_core *chip, int reg, unsigned char val) { chip->ops->out8(chip, reg, val); }

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static inline void snd_vx_outl(struct vx_core *chip, int reg, unsigned int val) { chip->ops->out32(chip, reg, val); }

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#define vx_inb(chip,reg) snd_vx_inb(chip, VX_##reg) #define vx_outb(chip,reg,val) snd_vx_outb(chip, VX_##reg,val) #define vx_inl(chip,reg) snd_vx_inl(chip, VX_##reg) #define vx_outl(chip,reg,val) snd_vx_outl(chip, VX_##reg,val)
static inline void vx_reset_dsp(struct vx_core *chip) { chip->ops->reset_dsp(chip); }

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int vx_send_msg(struct vx_core *chip, struct vx_rmh *rmh); int vx_send_msg_nolock(struct vx_core *chip, struct vx_rmh *rmh); int vx_send_rih(struct vx_core *chip, int cmd); int vx_send_rih_nolock(struct vx_core *chip, int cmd); void vx_reset_codec(struct vx_core *chip, int cold_reset); /* * check the bit on the specified register * returns zero if a bit matches, or a negative error code. * exported for vxpocket driver */ int snd_vx_check_reg_bit(struct vx_core *chip, int reg, int mask, int bit, int time); #define vx_check_isr(chip,mask,bit,time) snd_vx_check_reg_bit(chip, VX_ISR, mask, bit, time) #define vx_wait_isr_bit(chip,bit) vx_check_isr(chip, bit, bit, 200) #define vx_wait_for_rx_full(chip) vx_wait_isr_bit(chip, ISR_RX_FULL) /* * pseudo-DMA transfer */
static inline void vx_pseudo_dma_write(struct vx_core *chip, struct snd_pcm_runtime *runtime, struct vx_pipe *pipe, int count) { chip->ops->dma_write(chip, runtime, pipe, count); }

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static inline void vx_pseudo_dma_read(struct vx_core *chip, struct snd_pcm_runtime *runtime, struct vx_pipe *pipe, int count) { chip->ops->dma_read(chip, runtime, pipe, count); }

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/* error with hardware code, * the return value is -(VX_ERR_MASK | actual-hw-error-code) */ #define VX_ERR_MASK 0x1000000 #define vx_get_error(err) (-(err) & ~VX_ERR_MASK) /* * pcm stuff */ int snd_vx_pcm_new(struct vx_core *chip); void vx_pcm_update_intr(struct vx_core *chip, unsigned int events); /* * mixer stuff */ int snd_vx_mixer_new(struct vx_core *chip); void vx_toggle_dac_mute(struct vx_core *chip, int mute); int vx_sync_audio_source(struct vx_core *chip); int vx_set_monitor_level(struct vx_core *chip, int audio, int level, int active); /* * IEC958 & clock stuff */ void vx_set_iec958_status(struct vx_core *chip, unsigned int bits); int vx_set_clock(struct vx_core *chip, unsigned int freq); void vx_set_internal_clock(struct vx_core *chip, unsigned int freq); int vx_change_frequency(struct vx_core *chip); /* * PM */ int snd_vx_suspend(