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linux/sound/pci/aw2/aw2-alsa.c
Takashi Iwai bf4067e8a1 ALSA: aw2: Fix the missing snd_card_free() call at probe error 
The previous cleanup with devres may lead to the incorrect release
orders at the probe error handling due to the devres's nature.  Until
we register the card, snd_card_free() has to be called at first for
releasing the stuff properly when the driver tries to manage and
release the stuff via card->private_free().

This patch fixes it by calling snd_card_free() manually on the error
from the probe callback.

Fixes: 33631012cd ("ALSA: aw2: Allocate resources with device-managed APIs")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220412102636.16000-32-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-04-12 17:58:38 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*****************************************************************************
*
* Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
* Jean-Christian Hassler <jhassler@free.fr>
*
* This file is part of the Audiowerk2 ALSA driver
*
*****************************************************************************/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include "saa7146.h"
#include "aw2-saa7146.h"
MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
"Jean-Christian Hassler <jhassler@free.fr>");
MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
MODULE_LICENSE("GPL");
/*********************************
* DEFINES
********************************/
#define CTL_ROUTE_ANALOG 0
#define CTL_ROUTE_DIGITAL 1
/*********************************
* TYPEDEFS
********************************/
/* hardware definition */
static const struct snd_pcm_hardware snd_aw2_playback_hw = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_44100,
.rate_min = 44100,
.rate_max = 44100,
.channels_min = 2,
.channels_max = 4,
.buffer_bytes_max = 32768,
.period_bytes_min = 4096,
.period_bytes_max = 32768,
.periods_min = 1,
.periods_max = 1024,
};
static const struct snd_pcm_hardware snd_aw2_capture_hw = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_44100,
.rate_min = 44100,
.rate_max = 44100,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 32768,
.period_bytes_min = 4096,
.period_bytes_max = 32768,
.periods_min = 1,
.periods_max = 1024,
};
struct aw2_pcm_device {
struct snd_pcm *pcm;
unsigned int stream_number;
struct aw2 *chip;
};
struct aw2 {
struct snd_aw2_saa7146 saa7146;
struct pci_dev *pci;
int irq;
spinlock_t reg_lock;
struct mutex mtx;
unsigned long iobase_phys;
void __iomem *iobase_virt;
struct snd_card *card;
struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
};
/*********************************
* FUNCTION DECLARATIONS
********************************/
static int snd_aw2_create(struct snd_card *card, struct pci_dev *pci);
static int snd_aw2_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id);
static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
int cmd);
static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
int cmd);
static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
*substream);
static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
*substream);
static int snd_aw2_new_pcm(struct aw2 *chip);
static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol);
static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol);
/*********************************
* VARIABLES
********************************/
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Audiowerk2 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
static const struct pci_device_id snd_aw2_ids[] = {
{PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA7146, 0, 0,
0, 0, 0},
{0}
};
MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
/* pci_driver definition */
static struct pci_driver aw2_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_aw2_ids,
.probe = snd_aw2_probe,
};
module_pci_driver(aw2_driver);
/* operators for playback PCM alsa interface */
static const struct snd_pcm_ops snd_aw2_playback_ops = {
.open = snd_aw2_pcm_playback_open,
.close = snd_aw2_pcm_playback_close,
.prepare = snd_aw2_pcm_prepare_playback,
.trigger = snd_aw2_pcm_trigger_playback,
.pointer = snd_aw2_pcm_pointer_playback,
};
/* operators for capture PCM alsa interface */
static const struct snd_pcm_ops snd_aw2_capture_ops = {
.open = snd_aw2_pcm_capture_open,
.close = snd_aw2_pcm_capture_close,
.prepare = snd_aw2_pcm_prepare_capture,
.trigger = snd_aw2_pcm_trigger_capture,
.pointer = snd_aw2_pcm_pointer_capture,
};
static const struct snd_kcontrol_new aw2_control = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Capture Route",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 0xffff,
.info = snd_aw2_control_switch_capture_info,
.get = snd_aw2_control_switch_capture_get,
.put = snd_aw2_control_switch_capture_put
};
/*********************************
* FUNCTION IMPLEMENTATIONS
********************************/
/* component-destructor */
static void snd_aw2_free(struct snd_card *card)
{
struct aw2 *chip = card->private_data;
/* Free hardware */
snd_aw2_saa7146_free(&chip->saa7146);
}
/* chip-specific constructor */
static int snd_aw2_create(struct snd_card *card,
struct pci_dev *pci)
{
struct aw2 *chip = card->private_data;
int err;
/* initialize the PCI entry */
err = pcim_enable_device(pci);
if (err < 0)
return err;
pci_set_master(pci);
/* check PCI availability (32bit DMA) */
if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
dev_err(card->dev, "Impossible to set 32bit mask DMA\n");
return -ENXIO;
}
/* initialize the stuff */
chip->card = card;
chip->pci = pci;
chip->irq = -1;
/* (1) PCI resource allocation */
err = pcim_iomap_regions(pci, 1 << 0, "Audiowerk2");
if (err < 0)
return err;
chip->iobase_phys = pci_resource_start(pci, 0);
chip->iobase_virt = pcim_iomap_table(pci)[0];
/* (2) initialization of the chip hardware */
snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
if (devm_request_irq(&pci->dev, pci->irq, snd_aw2_saa7146_interrupt,
IRQF_SHARED, KBUILD_MODNAME, chip)) {
dev_err(card->dev, "Cannot grab irq %d\n", pci->irq);
return -EBUSY;
}
chip->irq = pci->irq;
card->sync_irq = chip->irq;
card->private_free = snd_aw2_free;
dev_info(card->dev,
"Audiowerk 2 sound card (saa7146 chipset) detected and managed\n");
return 0;
}
/* constructor */
static int snd_aw2_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
struct snd_card *card;
struct aw2 *chip;
int err;
/* (1) Continue if device is not enabled, else inc dev */
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
/* (2) Create card instance */
err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
sizeof(*chip), &card);
if (err < 0)
return err;
chip = card->private_data;
/* (3) Create main component */
err = snd_aw2_create(card, pci);
if (err < 0)
goto error;
/* initialize mutex */
mutex_init(&chip->mtx);
/* init spinlock */
spin_lock_init(&chip->reg_lock);
/* (4) Define driver ID and name string */
strcpy(card->driver, "aw2");
strcpy(card->shortname, "Audiowerk2");
sprintf(card->longname, "%s with SAA7146 irq %i",
card->shortname, chip->irq);
/* (5) Create other components */
snd_aw2_new_pcm(chip);
/* (6) Register card instance */
err = snd_card_register(card);
if (err < 0)
goto error;
/* (7) Set PCI driver data */
pci_set_drvdata(pci, card);
dev++;
return 0;
error:
snd_card_free(card);
return err;
}
/* open callback */
static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
dev_dbg(substream->pcm->card->dev, "Playback_open\n");
runtime->hw = snd_aw2_playback_hw;
return 0;
}
/* close callback */
static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
{
return 0;
}
static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
dev_dbg(substream->pcm->card->dev, "Capture_open\n");
runtime->hw = snd_aw2_capture_hw;
return 0;
}
/* close callback */
static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
{
/* TODO: something to do ? */
return 0;
}
/* prepare callback for playback */
static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long period_size, buffer_size;
mutex_lock(&chip->mtx);
period_size = snd_pcm_lib_period_bytes(substream);
buffer_size = snd_pcm_lib_buffer_bytes(substream);
snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_addr, period_size,
buffer_size);
/* Define Interrupt callback */
snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
(snd_aw2_saa7146_it_cb)
snd_pcm_period_elapsed,
(void *)substream);
mutex_unlock(&chip->mtx);
return 0;
}
/* prepare callback for capture */
static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long period_size, buffer_size;
mutex_lock(&chip->mtx);
period_size = snd_pcm_lib_period_bytes(substream);
buffer_size = snd_pcm_lib_buffer_bytes(substream);
snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_addr, period_size,
buffer_size);
/* Define Interrupt callback */
snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
(snd_aw2_saa7146_it_cb)
snd_pcm_period_elapsed,
(void *)substream);
mutex_unlock(&chip->mtx);
return 0;
}
/* playback trigger callback */
static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
int cmd)
{
int status = 0;
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
pcm_device->
stream_number);
break;
case SNDRV_PCM_TRIGGER_STOP:
snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
pcm_device->
stream_number);
break;
default:
status = -EINVAL;
}
spin_unlock(&chip->reg_lock);
return status;
}
/* capture trigger callback */
static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
int cmd)
{
int status = 0;
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
pcm_device->
stream_number);
break;
case SNDRV_PCM_TRIGGER_STOP:
snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
pcm_device->
stream_number);
break;
default:
status = -EINVAL;
}
spin_unlock(&chip->reg_lock);
return status;
}
/* playback pointer callback */
static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
*substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
unsigned int current_ptr;
/* get the current hardware pointer */
struct snd_pcm_runtime *runtime = substream->runtime;
current_ptr =
snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_area,
runtime->buffer_size);
return bytes_to_frames(substream->runtime, current_ptr);
}
/* capture pointer callback */
static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
*substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
unsigned int current_ptr;
/* get the current hardware pointer */
struct snd_pcm_runtime *runtime = substream->runtime;
current_ptr =
snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_area,
runtime->buffer_size);
return bytes_to_frames(substream->runtime, current_ptr);
}
/* create a pcm device */
static int snd_aw2_new_pcm(struct aw2 *chip)
{
struct snd_pcm *pcm_playback_ana;
struct snd_pcm *pcm_playback_num;
struct snd_pcm *pcm_capture;
struct aw2_pcm_device *pcm_device;
int err = 0;
/* Create new Alsa PCM device */
err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
&pcm_playback_ana);
if (err < 0) {
dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
return err;
}
/* Creation ok */
pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
/* Set PCM device name */
strcpy(pcm_playback_ana->name, "Analog playback");
/* Associate private data to PCM device */
pcm_playback_ana->private_data = pcm_device;
/* set operators of PCM device */
snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
&snd_aw2_playback_ops);
/* store PCM device */
pcm_device->pcm = pcm_playback_ana;
/* give base chip pointer to our internal pcm device
structure */
pcm_device->chip = chip;
/* Give stream number to PCM device */
pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
/* pre-allocation of buffers */
/* Preallocate continuous pages. */
snd_pcm_set_managed_buffer_all(pcm_playback_ana,
SNDRV_DMA_TYPE_DEV,
&chip->pci->dev,
64 * 1024, 64 * 1024);
err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
&pcm_playback_num);
if (err < 0) {
dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
return err;
}
/* Creation ok */
pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
/* Set PCM device name */
strcpy(pcm_playback_num->name, "Digital playback");
/* Associate private data to PCM device */
pcm_playback_num->private_data = pcm_device;
/* set operators of PCM device */
snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
&snd_aw2_playback_ops);
/* store PCM device */
pcm_device->pcm = pcm_playback_num;
/* give base chip pointer to our internal pcm device
structure */
pcm_device->chip = chip;
/* Give stream number to PCM device */
pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
/* pre-allocation of buffers */
/* Preallocate continuous pages. */
snd_pcm_set_managed_buffer_all(pcm_playback_num,
SNDRV_DMA_TYPE_DEV,
&chip->pci->dev,
64 * 1024, 64 * 1024);
err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
&pcm_capture);
if (err < 0) {
dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
return err;
}
/* Creation ok */
pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
/* Set PCM device name */
strcpy(pcm_capture->name, "Capture");
/* Associate private data to PCM device */
pcm_capture->private_data = pcm_device;
/* set operators of PCM device */
snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
&snd_aw2_capture_ops);
/* store PCM device */
pcm_device->pcm = pcm_capture;
/* give base chip pointer to our internal pcm device
structure */
pcm_device->chip = chip;
/* Give stream number to PCM device */
pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
/* pre-allocation of buffers */
/* Preallocate continuous pages. */
snd_pcm_set_managed_buffer_all(pcm_capture,
SNDRV_DMA_TYPE_DEV,
&chip->pci->dev,
64 * 1024, 64 * 1024);
/* Create control */
err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
if (err < 0) {
dev_err(chip->card->dev, "snd_ctl_add error (0x%X)\n", err);
return err;
}
return 0;
}
static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static const char * const texts[2] = {
"Analog", "Digital"
};
return snd_ctl_enum_info(uinfo, 1, 2, texts);
}
static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol)
{
struct aw2 *chip = snd_kcontrol_chip(kcontrol);
if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
else
ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
return 0;
}
static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol)
{
struct aw2 *chip = snd_kcontrol_chip(kcontrol);
int changed = 0;
int is_disgital =
snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
&& !is_disgital)
|| ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
&& is_disgital)) {
snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
changed = 1;
}
return changed;
}
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