// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Digigram VX soundcards
*
* Hardware core part
*
* Copyright ( c ) 2002 by Takashi Iwai < tiwai @ suse . de >
*/
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/asoundef.h>
#include <sound/info.h>
#include <sound/vx_core.h>
#include "vx_cmd.h"
MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>" );
MODULE_DESCRIPTION("Common routines for Digigram VX drivers" );
MODULE_LICENSE("GPL" );
/*
* vx_check_reg_bit - wait for the specified bit is set / reset on a register
* @ reg : register to check
* @ mask : bit mask
* @ bit : resultant bit to be checked
* @ time : time - out of loop in msec
*
* returns zero if a bit matches , or a negative error code .
*/
int snd_vx_check_reg_bit(struct vx_core *chip, int reg, int mask, int bit, int time)
{
unsigned long end_time = jiffies + (time * HZ + 999 ) / 1000 ;
static const char * const reg_names[VX_REG_MAX] = {
"ICR" , "CVR" , "ISR" , "IVR" , "RXH" , "RXM" , "RXL" ,
"DMA" , "CDSP" , "RFREQ" , "RUER/V2" , "DATA" , "MEMIRQ" ,
"ACQ" , "BIT0" , "BIT1" , "MIC0" , "MIC1" , "MIC2" ,
"MIC3" , "INTCSR" , "CNTRL" , "GPIOC" ,
"LOFREQ" , "HIFREQ" , "CSUER" , "RUER"
};
do {
if ((snd_vx_inb(chip, reg) & mask) == bit)
return 0 ;
//msleep(10);
} while (time_after_eq(end_time, jiffies));
dev_dbg(chip->card->dev,
"vx_check_reg_bit: timeout, reg=%s, mask=0x%x, val=0x%x\n" ,
reg_names[reg], mask, snd_vx_inb(chip, reg));
return -EIO;
}
EXPORT_SYMBOL(snd_vx_check_reg_bit);
/*
* vx_send_irq_dsp - set command irq bit
* @ num : the requested IRQ type , IRQ_XXX
*
* this triggers the specified IRQ request
* returns 0 if successful , or a negative error code .
*
*/
static int vx_send_irq_dsp(struct vx_core *chip, int num)
{
int nirq;
/* wait for Hc = 0 */
if (snd_vx_check_reg_bit(chip, VX_CVR, CVR_HC, 0 , 200 ) < 0 )
return -EIO;
nirq = num;
if (vx_has_new_dsp(chip))
nirq += VXP_IRQ_OFFSET;
vx_outb(chip, CVR, (nirq >> 1 ) | CVR_HC);
return 0 ;
}
/*
* vx_reset_chk - reset CHK bit on ISR
*
* returns 0 if successful , or a negative error code .
*/
static int vx_reset_chk(struct vx_core *chip)
{
/* Reset irq CHK */
if (vx_send_irq_dsp(chip, IRQ_RESET_CHK) < 0 )
return -EIO;
/* Wait until CHK = 0 */
if (vx_check_isr(chip, ISR_CHK, 0 , 200 ) < 0 )
return -EIO;
return 0 ;
}
/*
* vx_transfer_end - terminate message transfer
* @ cmd : IRQ message to send ( IRQ_MESS_XXX_END )
*
* returns 0 if successful , or a negative error code .
* the error code can be VX - specific , retrieved via vx_get_error ( ) .
* NB : call with mutex held !
*/
static int vx_transfer_end(struct vx_core *chip, int cmd)
{
int err;
err = vx_reset_chk(chip);
if (err < 0 )
return err;
/* irq MESS_READ/WRITE_END */
err = vx_send_irq_dsp(chip, cmd);
if (err < 0 )
return err;
/* Wait CHK = 1 */
err = vx_wait_isr_bit(chip, ISR_CHK);
if (err < 0 )
return err;
/* If error, Read RX */
err = vx_inb(chip, ISR);
if (err & ISR_ERR) {
err = vx_wait_for_rx_full(chip);
if (err < 0 ) {
dev_dbg(chip->card->dev,
"transfer_end: error in rx_full\n" );
return err;
}
err = vx_inb(chip, RXH) << 16 ;
err |= vx_inb(chip, RXM) << 8 ;
err |= vx_inb(chip, RXL);
dev_dbg(chip->card->dev, "transfer_end: error = 0x%x\n" , err);
return -(VX_ERR_MASK | err);
}
return 0 ;
}
/*
* vx_read_status - return the status rmh
* @ rmh : rmh record to store the status
*
* returns 0 if successful , or a negative error code .
* the error code can be VX - specific , retrieved via vx_get_error ( ) .
* NB : call with mutex held !
*/
static int vx_read_status(struct vx_core *chip, struct vx_rmh *rmh)
{
int i, err, val, size;
/* no read necessary? */
if (rmh->DspStat == RMH_SSIZE_FIXED && rmh->LgStat == 0 )
return 0 ;
/* Wait for RX full (with timeout protection)
* The first word of status is in RX
*/
err = vx_wait_for_rx_full(chip);
if (err < 0 )
return err;
/* Read RX */
val = vx_inb(chip, RXH) << 16 ;
val |= vx_inb(chip, RXM) << 8 ;
val |= vx_inb(chip, RXL);
/* If status given by DSP, let's decode its size */
switch (rmh->DspStat) {
case RMH_SSIZE_ARG:
size = val & 0 xff;
rmh->Stat[0 ] = val & 0 xffff00;
rmh->LgStat = size + 1 ;
break ;
case RMH_SSIZE_MASK:
/* Let's count the arg numbers from a mask */
rmh->Stat[0 ] = val;
size = 0 ;
while (val) {
if (val & 0 x01)
size++;
val >>= 1 ;
}
rmh->LgStat = size + 1 ;
break ;
default :
/* else retrieve the status length given by the driver */
size = rmh->LgStat;
rmh->Stat[0 ] = val; /* Val is the status 1st word */
size--; /* hence adjust remaining length */
break ;
}
if (size < 1 )
return 0 ;
if (snd_BUG_ON(size >= SIZE_MAX_STATUS))
return -EINVAL;
for (i = 1 ; i <= size; i++) {
/* trigger an irq MESS_WRITE_NEXT */
err = vx_send_irq_dsp(chip, IRQ_MESS_WRITE_NEXT);
if (err < 0 )
return err;
/* Wait for RX full (with timeout protection) */
err = vx_wait_for_rx_full(chip);
if (err < 0 )
return err;
rmh->Stat[i] = vx_inb(chip, RXH) << 16 ;
rmh->Stat[i] |= vx_inb(chip, RXM) << 8 ;
rmh->Stat[i] |= vx_inb(chip, RXL);
}
return vx_transfer_end(chip, IRQ_MESS_WRITE_END);
}
#define MASK_MORE_THAN_1_WORD_COMMAND 0 x00008000
#define MASK_1_WORD_COMMAND 0 x00ff7fff
/*
* vx_send_msg_nolock - send a DSP message and read back the status
* @ rmh : the rmh record to send and receive
*
* returns 0 if successful , or a negative error code .
* the error code can be VX - specific , retrieved via vx_get_error ( ) .
*
* this function doesn ' t call mutex lock at all .
*/
int vx_send_msg_nolock(struct vx_core *chip, struct vx_rmh *rmh)
{
int i, err;
if (chip->chip_status & VX_STAT_IS_STALE)
return -EBUSY;
err = vx_reset_chk(chip);
if (err < 0 ) {
dev_dbg(chip->card->dev, "vx_send_msg: vx_reset_chk error\n" );
return err;
}
/* Check bit M is set according to length of the command */
if (rmh->LgCmd > 1 )
rmh->Cmd[0 ] |= MASK_MORE_THAN_1_WORD_COMMAND;
else
rmh->Cmd[0 ] &= MASK_1_WORD_COMMAND;
/* Wait for TX empty */
err = vx_wait_isr_bit(chip, ISR_TX_EMPTY);
if (err < 0 ) {
dev_dbg(chip->card->dev, "vx_send_msg: wait tx empty error\n" );
return err;
}
/* Write Cmd[0] */
vx_outb(chip, TXH, (rmh->Cmd[0 ] >> 16 ) & 0 xff);
vx_outb(chip, TXM, (rmh->Cmd[0 ] >> 8 ) & 0 xff);
vx_outb(chip, TXL, rmh->Cmd[0 ] & 0 xff);
/* Trigger irq MESSAGE */
err = vx_send_irq_dsp(chip, IRQ_MESSAGE);
if (err < 0 ) {
dev_dbg(chip->card->dev,
"vx_send_msg: send IRQ_MESSAGE error\n" );
return err;
}
/* Wait for CHK = 1 */
err = vx_wait_isr_bit(chip, ISR_CHK);
if (err < 0 )
return err;
/* If error, get error value from RX */
if (vx_inb(chip, ISR) & ISR_ERR) {
err = vx_wait_for_rx_full(chip);
if (err < 0 ) {
dev_dbg(chip->card->dev,
"vx_send_msg: rx_full read error\n" );
return err;
}
err = vx_inb(chip, RXH) << 16 ;
err |= vx_inb(chip, RXM) << 8 ;
err |= vx_inb(chip, RXL);
dev_dbg(chip->card->dev,
"msg got error = 0x%x at cmd[0]\n" , err);
err = -(VX_ERR_MASK | err);
return err;
}
/* Send the other words */
if (rmh->LgCmd > 1 ) {
for (i = 1 ; i < rmh->LgCmd; i++) {
/* Wait for TX ready */
err = vx_wait_isr_bit(chip, ISR_TX_READY);
if (err < 0 ) {
dev_dbg(chip->card->dev,
"vx_send_msg: tx_ready error\n" );
return err;
}
/* Write Cmd[i] */
vx_outb(chip, TXH, (rmh->Cmd[i] >> 16 ) & 0 xff);
vx_outb(chip, TXM, (rmh->Cmd[i] >> 8 ) & 0 xff);
vx_outb(chip, TXL, rmh->Cmd[i] & 0 xff);
/* Trigger irq MESS_READ_NEXT */
err = vx_send_irq_dsp(chip, IRQ_MESS_READ_NEXT);
if (err < 0 ) {
dev_dbg(chip->card->dev,
"vx_send_msg: IRQ_READ_NEXT error\n" );
return err;
}
}
/* Wait for TX empty */
err = vx_wait_isr_bit(chip, ISR_TX_READY);
if (err < 0 ) {
dev_dbg(chip->card->dev,
"vx_send_msg: TX_READY error\n" );
return err;
}
/* End of transfer */
err = vx_transfer_end(chip, IRQ_MESS_READ_END);
if (err < 0 )
return err;
}
return vx_read_status(chip, rmh);
}
/*
* vx_send_msg - send a DSP message with mutex
* @ rmh : the rmh record to send and receive
*
* returns 0 if successful , or a negative error code .
* see vx_send_msg_nolock ( ) .
*/
int vx_send_msg(struct vx_core *chip, struct vx_rmh *rmh)
{
int err;
mutex_lock(&chip->lock);
err = vx_send_msg_nolock(chip, rmh);
mutex_unlock(&chip->lock);
return err;
}
/*
* vx_send_rih_nolock - send an RIH to xilinx
* @ cmd : the command to send
*
* returns 0 if successful , or a negative error code .
* the error code can be VX - specific , retrieved via vx_get_error ( ) .
*
* this function doesn ' t call mutex at all .
*
* unlike RMH , no command is sent to DSP .
*/
int vx_send_rih_nolock(struct vx_core *chip, int cmd)
{
int err;
if (chip->chip_status & VX_STAT_IS_STALE)
return -EBUSY;
err = vx_reset_chk(chip);
if (err < 0 )
return err;
/* send the IRQ */
err = vx_send_irq_dsp(chip, cmd);
if (err < 0 )
return err;
/* Wait CHK = 1 */
err = vx_wait_isr_bit(chip, ISR_CHK);
if (err < 0 )
return err;
/* If error, read RX */
if (vx_inb(chip, ISR) & ISR_ERR) {
err = vx_wait_for_rx_full(chip);
if (err < 0 )
return err;
err = vx_inb(chip, RXH) << 16 ;
err |= vx_inb(chip, RXM) << 8 ;
err |= vx_inb(chip, RXL);
return -(VX_ERR_MASK | err);
}
return 0 ;
}
/*
* vx_send_rih - send an RIH with mutex
* @ cmd : the command to send
*
* see vx_send_rih_nolock ( ) .
*/
int vx_send_rih(struct vx_core *chip, int cmd)
{
int err;
mutex_lock(&chip->lock);
err = vx_send_rih_nolock(chip, cmd);
mutex_unlock(&chip->lock);
return err;
}
#define END_OF_RESET_WAIT_TIME 500 /* us */
/**
* snd_vx_load_boot_image - boot up the xilinx interface
* @ chip : VX core instance
* @ boot : the boot record to load
*/
int snd_vx_load_boot_image(struct vx_core *chip, const struct firmware *boot)
{
unsigned int i;
int no_fillup = vx_has_new_dsp(chip);
/* check the length of boot image */
if (boot->size <= 0 )
return -EINVAL;
if (boot->size % 3 )
return -EINVAL;
#if 0
{
/* more strict check */
unsigned int c = ((u32)boot->data[0 ] << 16 ) | ((u32)boot->data[1 ] << 8 ) | boot->data[2 ];
if (boot->size != (c + 2 ) * 3 )
return -EINVAL;
}
#endif
/* reset dsp */
vx_reset_dsp(chip);
udelay(END_OF_RESET_WAIT_TIME); /* another wait? */
/* download boot strap */
for (i = 0 ; i < 0 x600; i += 3 ) {
if (i >= boot->size) {
if (no_fillup)
break ;
if (vx_wait_isr_bit(chip, ISR_TX_EMPTY) < 0 ) {
dev_err(chip->card->dev, "dsp boot failed at %d\n" , i);
return -EIO;
}
vx_outb(chip, TXH, 0 );
vx_outb(chip, TXM, 0 );
vx_outb(chip, TXL, 0 );
} else {
const unsigned char *image = boot->data + i;
if (vx_wait_isr_bit(chip, ISR_TX_EMPTY) < 0 ) {
dev_err(chip->card->dev, "dsp boot failed at %d\n" , i);
return -EIO;
}
vx_outb(chip, TXH, image[0 ]);
vx_outb(chip, TXM, image[1 ]);
vx_outb(chip, TXL, image[2 ]);
}
}
return 0 ;
}
EXPORT_SYMBOL(snd_vx_load_boot_image);
/*
* vx_test_irq_src - query the source of interrupts
*
* called from irq handler only
*/
static int vx_test_irq_src(struct vx_core *chip, unsigned int *ret)
{
int err;
vx_init_rmh(&chip->irq_rmh, CMD_TEST_IT);
mutex_lock(&chip->lock);
err = vx_send_msg_nolock(chip, &chip->irq_rmh);
if (err < 0 )
*ret = 0 ;
else
*ret = chip->irq_rmh.Stat[0 ];
mutex_unlock(&chip->lock);
return err;
}
/*
* snd_vx_threaded_irq_handler - threaded irq handler
*/
irqreturn_t snd_vx_threaded_irq_handler(int irq, void *dev)
{
struct vx_core *chip = dev;
unsigned int events;
if (chip->chip_status & VX_STAT_IS_STALE)
return IRQ_HANDLED;
if (vx_test_irq_src(chip, &events) < 0 )
return IRQ_HANDLED;
/* We must prevent any application using this DSP
* and block any further request until the application
* either unregisters or reloads the DSP
*/
if (events & FATAL_DSP_ERROR) {
dev_err(chip->card->dev, "vx_core: fatal DSP error!!\n" );
return IRQ_HANDLED;
}
/* The start on time code conditions are filled (ie the time code
* received by the board is equal to one of those given to it ) .
*/
if (events & TIME_CODE_EVENT_PENDING) {
; /* so far, nothing to do yet */
}
/* The frequency has changed on the board (UER mode). */
if (events & FREQUENCY_CHANGE_EVENT_PENDING)
vx_change_frequency(chip);
/* update the pcm streams */
vx_pcm_update_intr(chip, events);
return IRQ_HANDLED;
}
EXPORT_SYMBOL(snd_vx_threaded_irq_handler);
/**
* snd_vx_irq_handler - interrupt handler
* @ irq : irq number
* @ dev : VX core instance
*/
irqreturn_t snd_vx_irq_handler(int irq, void *dev)
{
struct vx_core *chip = dev;
if (! (chip->chip_status & VX_STAT_CHIP_INIT) ||
(chip->chip_status & VX_STAT_IS_STALE))
return IRQ_NONE;
if (! vx_test_and_ack(chip))
return IRQ_WAKE_THREAD;
return IRQ_NONE;
}
EXPORT_SYMBOL(snd_vx_irq_handler);
/*
*/
static void vx_reset_board(struct vx_core *chip, int cold_reset)
{
if (snd_BUG_ON(!chip->ops->reset_board))
return ;
/* current source, later sync'ed with target */
chip->audio_source = VX_AUDIO_SRC_LINE;
if (cold_reset) {
chip->audio_source_target = chip->audio_source;
chip->clock_source = INTERNAL_QUARTZ;
chip->clock_mode = VX_CLOCK_MODE_AUTO;
chip->freq = 48000 ;
chip->uer_detected = VX_UER_MODE_NOT_PRESENT;
chip->uer_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
}
chip->ops->reset_board(chip, cold_reset);
vx_reset_codec(chip, cold_reset);
vx_set_internal_clock(chip, chip->freq);
/* Reset the DSP */
vx_reset_dsp(chip);
if (vx_is_pcmcia(chip)) {
/* Acknowledge any pending IRQ and reset the MEMIRQ flag. */
vx_test_and_ack(chip);
vx_validate_irq(chip, 1 );
}
/* init CBits */
vx_set_iec958_status(chip, chip->uer_bits);
}
/*
* proc interface
*/
static void vx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
struct vx_core *chip = entry->private_data;
static const char * const audio_src_vxp[] = { "Line" , "Mic" , "Digital" };
static const char * const audio_src_vx2[] = { "Analog" , "Analog" , "Digital" };
static const char * const clock_mode[] = { "Auto" , "Internal" , "External" };
static const char * const clock_src[] = { "Internal" , "External" };
static const char * const uer_type[] = { "Consumer" , "Professional" , "Not Present" };
snd_iprintf(buffer, "%s\n" , chip->card->longname);
snd_iprintf(buffer, "Xilinx Firmware: %s\n" ,
(chip->chip_status & VX_STAT_XILINX_LOADED) ? "Loaded" : "No" );
snd_iprintf(buffer, "Device Initialized: %s\n" ,
(chip->chip_status & VX_STAT_DEVICE_INIT) ? "Yes" : "No" );
snd_iprintf(buffer, "DSP audio info:" );
if (chip->audio_info & VX_AUDIO_INFO_REAL_TIME)
snd_iprintf(buffer, " realtime" );
if (chip->audio_info & VX_AUDIO_INFO_OFFLINE)
snd_iprintf(buffer, " offline" );
if (chip->audio_info & VX_AUDIO_INFO_MPEG1)
snd_iprintf(buffer, " mpeg1" );
if (chip->audio_info & VX_AUDIO_INFO_MPEG2)
snd_iprintf(buffer, " mpeg2" );
if (chip->audio_info & VX_AUDIO_INFO_LINEAR_8)
snd_iprintf(buffer, " linear8" );
if (chip->audio_info & VX_AUDIO_INFO_LINEAR_16)
snd_iprintf(buffer, " linear16" );
if (chip->audio_info & VX_AUDIO_INFO_LINEAR_24)
snd_iprintf(buffer, " linear24" );
snd_iprintf(buffer, "\n" );
snd_iprintf(buffer, "Input Source: %s\n" , vx_is_pcmcia(chip) ?
audio_src_vxp[chip->audio_source] :
audio_src_vx2[chip->audio_source]);
snd_iprintf(buffer, "Clock Mode: %s\n" , clock_mode[chip->clock_mode]);
snd_iprintf(buffer, "Clock Source: %s\n" , clock_src[chip->clock_source]);
snd_iprintf(buffer, "Frequency: %d\n" , chip->freq);
snd_iprintf(buffer, "Detected Frequency: %d\n" , chip->freq_detected);
snd_iprintf(buffer, "Detected UER type: %s\n" , uer_type[chip->uer_detected]);
snd_iprintf(buffer, "Min/Max/Cur IBL: %d/%d/%d (granularity=%d)\n" ,
chip->ibl.min_size, chip->ibl.max_size, chip->ibl.size,
chip->ibl.granularity);
}
static void vx_proc_init(struct vx_core *chip)
{
snd_card_ro_proc_new(chip->card, "vx-status" , chip, vx_proc_read);
}
/**
* snd_vx_dsp_boot - load the DSP boot
* @ chip : VX core instance
* @ boot : firmware data
*/
int snd_vx_dsp_boot(struct vx_core *chip, const struct firmware *boot)
{
int err;
int cold_reset = !(chip->chip_status & VX_STAT_DEVICE_INIT);
vx_reset_board(chip, cold_reset);
vx_validate_irq(chip, 0 );
err = snd_vx_load_boot_image(chip, boot);
if (err < 0 )
return err;
msleep(10 );
return 0 ;
}
EXPORT_SYMBOL(snd_vx_dsp_boot);
/**
* snd_vx_dsp_load - load the DSP image
* @ chip : VX core instance
* @ dsp : firmware data
*/
int snd_vx_dsp_load(struct vx_core *chip, const struct firmware *dsp)
{
unsigned int i;
int err;
unsigned int csum = 0 ;
const unsigned char *image, *cptr;
if (dsp->size % 3 )
return -EINVAL;
vx_toggle_dac_mute(chip, 1 );
/* Transfert data buffer from PC to DSP */
for (i = 0 ; i < dsp->size; i += 3 ) {
image = dsp->data + i;
/* Wait DSP ready for a new read */
err = vx_wait_isr_bit(chip, ISR_TX_EMPTY);
if (err < 0 ) {
dev_err(chip->card->dev,
"dsp loading error at position %d\n" , i);
return err;
}
cptr = image;
csum ^= *cptr;
csum = (csum >> 24 ) | (csum << 8 );
vx_outb(chip, TXH, *cptr++);
csum ^= *cptr;
csum = (csum >> 24 ) | (csum << 8 );
vx_outb(chip, TXM, *cptr++);
csum ^= *cptr;
csum = (csum >> 24 ) | (csum << 8 );
vx_outb(chip, TXL, *cptr++);
}
msleep(200 );
err = vx_wait_isr_bit(chip, ISR_CHK);
if (err < 0 )
return err;
vx_toggle_dac_mute(chip, 0 );
vx_test_and_ack(chip);
vx_validate_irq(chip, 1 );
return 0 ;
}
EXPORT_SYMBOL(snd_vx_dsp_load);
#ifdef CONFIG_PM
/*
* suspend
*/
int snd_vx_suspend(struct vx_core *chip)
{
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
chip->chip_status |= VX_STAT_IN_SUSPEND;
return 0 ;
}
EXPORT_SYMBOL(snd_vx_suspend);
/*
* resume
*/
int snd_vx_resume(struct vx_core *chip)
{
int i, err;
chip->chip_status &= ~VX_STAT_CHIP_INIT;
for (i = 0 ; i < 4 ; i++) {
if (! chip->firmware[i])
continue ;
err = chip->ops->load_dsp(chip, i, chip->firmware[i]);
if (err < 0 ) {
dev_err(chip->card->dev,
"vx: firmware resume error at DSP %d\n" , i);
return -EIO;
}
}
chip->chip_status |= VX_STAT_CHIP_INIT;
chip->chip_status &= ~VX_STAT_IN_SUSPEND;
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
return 0 ;
}
EXPORT_SYMBOL(snd_vx_resume);
#endif
static void snd_vx_release(struct device *dev, void *data)
{
snd_vx_free_firmware(data);
}
/**
* snd_vx_create - constructor for struct vx_core
* @ card : card instance
* @ hw : hardware specific record
* @ ops : VX ops pointer
* @ extra_size : extra byte size to allocate appending to chip
*
* this function allocates the instance and prepare for the hardware
* initialization .
*
* The object is managed via devres , and will be automatically released .
*
* return the instance pointer if successful , NULL in error .
*/
struct vx_core *snd_vx_create(struct snd_card *card,
const struct snd_vx_hardware *hw,
const struct snd_vx_ops *ops,
int extra_size)
{
struct vx_core *chip;
if (snd_BUG_ON(!card || !hw || !ops))
return NULL;
chip = devres_alloc(snd_vx_release, sizeof (*chip) + extra_size,
GFP_KERNEL);
if (!chip)
return NULL;
mutex_init(&chip->lock);
chip->irq = -1 ;
chip->hw = hw;
chip->type = hw->type;
chip->ops = ops;
mutex_init(&chip->mixer_mutex);
chip->card = card;
card->private_data = chip;
strscpy(card->driver, hw->name);
sprintf(card->shortname, "Digigram %s" , hw->name);
vx_proc_init(chip);
return chip;
}
EXPORT_SYMBOL(snd_vx_create);
Messung V0.5 in Prozent C=92 H=95 G=93
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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