linux/sound/pci/mixart/mixart_core.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for Digigram miXart soundcards
 *
 * low level interface with interrupt handling and mail box implementation
 *
 * Copyright (c) 2003 by Digigram <[email protected]>
 */

#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/io.h>

#include <sound/core.h>
#include "mixart.h"
#include "mixart_hwdep.h"
#include "mixart_core.h"


#define MSG_TIMEOUT_JIFFIES …

#define MSG_DESCRIPTOR_SIZE …
#define MSG_HEADER_SIZE …

#define MSG_TYPE_MASK …
#define MSG_TYPE_NOTIFY …
#define MSG_TYPE_COMMAND …
#define MSG_TYPE_REQUEST …
#define MSG_TYPE_ANSWER …
#define MSG_CANCEL_NOTIFY_MASK …


static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
{ … }

static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
		   u32 msg_frame_address )
{ … }


/*
 * send a message to miXart. return: the msg_frame used for this message
 */
/* call with mgr->msg_lock held! */
static int send_msg( struct mixart_mgr *mgr,
		     struct mixart_msg *msg,
		     int max_answersize,
		     int mark_pending,
		     u32 *msg_event)
{ … }


int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
{ … }


int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
				   struct mixart_msg *request, u32 notif_event)
{ … }


int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
{ … }


/* common buffer of interrupt to send/receive messages */
static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];


static void snd_mixart_process_msg(struct mixart_mgr *mgr)
{ … }


irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
{ … }

irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
{ … }


void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
{ … }

void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
{ … }

void snd_mixart_reset_board(struct mixart_mgr *mgr)
{ … }