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Diffstat (limited to 'sound/pci/hda/hda_codec.c')
-rw-r--r--sound/pci/hda/hda_codec.c428
1 files changed, 333 insertions, 95 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 6447754ae56..eaa8b5676ea 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -107,6 +107,52 @@ static void hda_keep_power_on(struct hda_codec *codec);
static inline void hda_keep_power_on(struct hda_codec *codec) {}
#endif
+const char *snd_hda_get_jack_location(u32 cfg)
+{
+ static char *bases[7] = {
+ "N/A", "Rear", "Front", "Left", "Right", "Top", "Bottom",
+ };
+ static unsigned char specials_idx[] = {
+ 0x07, 0x08,
+ 0x17, 0x18, 0x19,
+ 0x37, 0x38
+ };
+ static char *specials[] = {
+ "Rear Panel", "Drive Bar",
+ "Riser", "HDMI", "ATAPI",
+ "Mobile-In", "Mobile-Out"
+ };
+ int i;
+ cfg = (cfg & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT;
+ if ((cfg & 0x0f) < 7)
+ return bases[cfg & 0x0f];
+ for (i = 0; i < ARRAY_SIZE(specials_idx); i++) {
+ if (cfg == specials_idx[i])
+ return specials[i];
+ }
+ return "UNKNOWN";
+}
+
+const char *snd_hda_get_jack_connectivity(u32 cfg)
+{
+ static char *jack_locations[4] = { "Ext", "Int", "Sep", "Oth" };
+
+ return jack_locations[(cfg >> (AC_DEFCFG_LOCATION_SHIFT + 4)) & 3];
+}
+
+const char *snd_hda_get_jack_type(u32 cfg)
+{
+ static char *jack_types[16] = {
+ "Line Out", "Speaker", "HP Out", "CD",
+ "SPDIF Out", "Digital Out", "Modem Line", "Modem Hand",
+ "Line In", "Aux", "Mic", "Telephony",
+ "SPDIF In", "Digitial In", "Reserved", "Other"
+ };
+
+ return jack_types[(cfg & AC_DEFCFG_DEVICE)
+ >> AC_DEFCFG_DEVICE_SHIFT];
+}
+
/**
* snd_hda_codec_read - send a command and get the response
* @codec: the HDA codec
@@ -344,7 +390,7 @@ static void process_unsol_events(struct work_struct *work)
/*
* initialize unsolicited queue
*/
-static int __devinit init_unsol_queue(struct hda_bus *bus)
+static int init_unsol_queue(struct hda_bus *bus)
{
struct hda_bus_unsolicited *unsol;
@@ -393,6 +439,20 @@ static int snd_hda_bus_dev_free(struct snd_device *device)
return snd_hda_bus_free(bus);
}
+#ifdef CONFIG_SND_HDA_HWDEP
+static int snd_hda_bus_dev_register(struct snd_device *device)
+{
+ struct hda_bus *bus = device->device_data;
+ struct hda_codec *codec;
+ list_for_each_entry(codec, &bus->codec_list, list) {
+ snd_hda_hwdep_add_sysfs(codec);
+ }
+ return 0;
+}
+#else
+#define snd_hda_bus_dev_register NULL
+#endif
+
/**
* snd_hda_bus_new - create a HDA bus
* @card: the card entry
@@ -408,6 +468,7 @@ int __devinit snd_hda_bus_new(struct snd_card *card,
struct hda_bus *bus;
int err;
static struct snd_device_ops dev_ops = {
+ .dev_register = snd_hda_bus_dev_register,
.dev_free = snd_hda_bus_dev_free,
};
@@ -446,7 +507,7 @@ int __devinit snd_hda_bus_new(struct snd_card *card,
#ifdef CONFIG_SND_HDA_GENERIC
#define is_generic_config(codec) \
- (codec->bus->modelname && !strcmp(codec->bus->modelname, "generic"))
+ (codec->modelname && !strcmp(codec->modelname, "generic"))
#else
#define is_generic_config(codec) 0
#endif
@@ -454,7 +515,7 @@ int __devinit snd_hda_bus_new(struct snd_card *card,
/*
* find a matching codec preset
*/
-static const struct hda_codec_preset __devinit *
+static const struct hda_codec_preset *
find_codec_preset(struct hda_codec *codec)
{
const struct hda_codec_preset **tbl, *preset;
@@ -481,15 +542,14 @@ find_codec_preset(struct hda_codec *codec)
}
/*
- * snd_hda_get_codec_name - store the codec name
+ * get_codec_name - store the codec name
*/
-void snd_hda_get_codec_name(struct hda_codec *codec,
- char *name, int namelen)
+static int get_codec_name(struct hda_codec *codec)
{
const struct hda_vendor_id *c;
const char *vendor = NULL;
u16 vendor_id = codec->vendor_id >> 16;
- char tmp[16];
+ char tmp[16], name[32];
for (c = hda_vendor_ids; c->id; c++) {
if (c->id == vendor_id) {
@@ -502,10 +562,15 @@ void snd_hda_get_codec_name(struct hda_codec *codec,
vendor = tmp;
}
if (codec->preset && codec->preset->name)
- snprintf(name, namelen, "%s %s", vendor, codec->preset->name);
+ snprintf(name, sizeof(name), "%s %s", vendor,
+ codec->preset->name);
else
- snprintf(name, namelen, "%s ID %x", vendor,
+ snprintf(name, sizeof(name), "%s ID %x", vendor,
codec->vendor_id & 0xffff);
+ codec->name = kstrdup(name, GFP_KERNEL);
+ if (!codec->name)
+ return -ENOMEM;
+ return 0;
}
/*
@@ -570,11 +635,14 @@ static void snd_hda_codec_free(struct hda_codec *codec)
flush_scheduled_work();
#endif
list_del(&codec->list);
+ snd_array_free(&codec->mixers);
codec->bus->caddr_tbl[codec->addr] = NULL;
if (codec->patch_ops.free)
codec->patch_ops.free(codec);
free_hda_cache(&codec->amp_cache);
free_hda_cache(&codec->cmd_cache);
+ kfree(codec->name);
+ kfree(codec->modelname);
kfree(codec->wcaps);
kfree(codec);
}
@@ -616,6 +684,14 @@ int __devinit snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
mutex_init(&codec->spdif_mutex);
init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));
init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));
+ snd_array_init(&codec->mixers, sizeof(struct snd_kcontrol *), 32);
+ if (codec->bus->modelname) {
+ codec->modelname = kstrdup(codec->bus->modelname, GFP_KERNEL);
+ if (!codec->modelname) {
+ snd_hda_codec_free(codec);
+ return -ENODEV;
+ }
+ }
#ifdef CONFIG_SND_HDA_POWER_SAVE
INIT_DELAYED_WORK(&codec->power_work, hda_power_work);
@@ -661,12 +737,41 @@ int __devinit snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_SUBSYSTEM_ID, 0);
}
+ if (bus->modelname)
+ codec->modelname = kstrdup(bus->modelname, GFP_KERNEL);
+
+ err = snd_hda_codec_configure(codec);
+ if (err < 0) {
+ snd_hda_codec_free(codec);
+ return err;
+ }
+ snd_hda_codec_proc_new(codec);
+
+ snd_hda_create_hwdep(codec);
+
+ sprintf(component, "HDA:%08x,%08x,%08x", codec->vendor_id,
+ codec->subsystem_id, codec->revision_id);
+ snd_component_add(codec->bus->card, component);
+
+ if (codecp)
+ *codecp = codec;
+ return 0;
+}
+
+int snd_hda_codec_configure(struct hda_codec *codec)
+{
+ int err;
codec->preset = find_codec_preset(codec);
+ if (!codec->name) {
+ err = get_codec_name(codec);
+ if (err < 0)
+ return err;
+ }
/* audio codec should override the mixer name */
- if (codec->afg || !*bus->card->mixername)
- snd_hda_get_codec_name(codec, bus->card->mixername,
- sizeof(bus->card->mixername));
+ if (codec->afg || !*codec->bus->card->mixername)
+ strlcpy(codec->bus->card->mixername, codec->name,
+ sizeof(codec->bus->card->mixername));
if (is_generic_config(codec)) {
err = snd_hda_parse_generic_codec(codec);
@@ -683,25 +788,9 @@ int __devinit snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
printk(KERN_ERR "hda-codec: No codec parser is available\n");
patched:
- if (err < 0) {
- snd_hda_codec_free(codec);
- return err;
- }
-
- if (codec->patch_ops.unsol_event)
- init_unsol_queue(bus);
-
- snd_hda_codec_proc_new(codec);
-#ifdef CONFIG_SND_HDA_HWDEP
- snd_hda_create_hwdep(codec);
-#endif
-
- sprintf(component, "HDA:%08x,%08x,%08x", codec->vendor_id, codec->subsystem_id, codec->revision_id);
- snd_component_add(codec->bus->card, component);
-
- if (codecp)
- *codecp = codec;
- return 0;
+ if (!err && codec->patch_ops.unsol_event)
+ err = init_unsol_queue(codec->bus);
+ return err;
}
/**
@@ -756,12 +845,12 @@ static void __devinit init_hda_cache(struct hda_cache_rec *cache,
{
memset(cache, 0, sizeof(*cache));
memset(cache->hash, 0xff, sizeof(cache->hash));
- cache->record_size = record_size;
+ snd_array_init(&cache->buf, record_size, 64);
}
static void free_hda_cache(struct hda_cache_rec *cache)
{
- kfree(cache->buffer);
+ snd_array_free(&cache->buf);
}
/* query the hash. allocate an entry if not found. */
@@ -770,38 +859,18 @@ static struct hda_cache_head *get_alloc_hash(struct hda_cache_rec *cache,
{
u16 idx = key % (u16)ARRAY_SIZE(cache->hash);
u16 cur = cache->hash[idx];
+ struct hda_cache_head *info_head = cache->buf.list;
struct hda_cache_head *info;
while (cur != 0xffff) {
- info = (struct hda_cache_head *)(cache->buffer +
- cur * cache->record_size);
+ info = &info_head[cur];
if (info->key == key)
return info;
cur = info->next;
}
/* add a new hash entry */
- if (cache->num_entries >= cache->size) {
- /* reallocate the array */
- unsigned int new_size = cache->size + 64;
- void *new_buffer;
- new_buffer = kcalloc(new_size, cache->record_size, GFP_KERNEL);
- if (!new_buffer) {
- snd_printk(KERN_ERR "hda_codec: "
- "can't malloc amp_info\n");
- return NULL;
- }
- if (cache->buffer) {
- memcpy(new_buffer, cache->buffer,
- cache->size * cache->record_size);
- kfree(cache->buffer);
- }
- cache->size = new_size;
- cache->buffer = new_buffer;
- }
- cur = cache->num_entries++;
- info = (struct hda_cache_head *)(cache->buffer +
- cur * cache->record_size);
+ info = snd_array_new(&cache->buf);
info->key = key;
info->val = 0;
info->next = cache->hash[idx];
@@ -942,10 +1011,10 @@ int snd_hda_codec_amp_stereo(struct hda_codec *codec, hda_nid_t nid,
/* resume the all amp commands from the cache */
void snd_hda_codec_resume_amp(struct hda_codec *codec)
{
- struct hda_amp_info *buffer = codec->amp_cache.buffer;
+ struct hda_amp_info *buffer = codec->amp_cache.buf.list;
int i;
- for (i = 0; i < codec->amp_cache.size; i++, buffer++) {
+ for (i = 0; i < codec->amp_cache.buf.used; i++, buffer++) {
u32 key = buffer->head.key;
hda_nid_t nid;
unsigned int idx, dir, ch;
@@ -1097,6 +1166,57 @@ struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
return _snd_hda_find_mixer_ctl(codec, name, 0);
}
+/* Add a control element and assign to the codec */
+int snd_hda_ctl_add(struct hda_codec *codec, struct snd_kcontrol *kctl)
+{
+ int err;
+ struct snd_kcontrol **knewp;
+
+ err = snd_ctl_add(codec->bus->card, kctl);
+ if (err < 0)
+ return err;
+ knewp = snd_array_new(&codec->mixers);
+ if (!knewp)
+ return -ENOMEM;
+ *knewp = kctl;
+ return 0;
+}
+
+/* Clear all controls assigned to the given codec */
+void snd_hda_ctls_clear(struct hda_codec *codec)
+{
+ int i;
+ struct snd_kcontrol **kctls = codec->mixers.list;
+ for (i = 0; i < codec->mixers.used; i++)
+ snd_ctl_remove(codec->bus->card, kctls[i]);
+ snd_array_free(&codec->mixers);
+}
+
+void snd_hda_codec_reset(struct hda_codec *codec)
+{
+ int i;
+
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+ cancel_delayed_work(&codec->power_work);
+ flush_scheduled_work();
+#endif
+ snd_hda_ctls_clear(codec);
+ /* relase PCMs */
+ for (i = 0; i < codec->num_pcms; i++) {
+ if (codec->pcm_info[i].pcm)
+ snd_device_free(codec->bus->card,
+ codec->pcm_info[i].pcm);
+ }
+ if (codec->patch_ops.free)
+ codec->patch_ops.free(codec);
+ codec->spec = NULL;
+ free_hda_cache(&codec->amp_cache);
+ free_hda_cache(&codec->cmd_cache);
+ codec->num_pcms = 0;
+ codec->pcm_info = NULL;
+ codec->preset = NULL;
+}
+
/* create a virtual master control and add slaves */
int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
unsigned int *tlv, const char **slaves)
@@ -1114,7 +1234,7 @@ int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
kctl = snd_ctl_make_virtual_master(name, tlv);
if (!kctl)
return -ENOMEM;
- err = snd_ctl_add(codec->bus->card, kctl);
+ err = snd_hda_ctl_add(codec, kctl);
if (err < 0)
return err;
@@ -1578,7 +1698,7 @@ int snd_hda_create_spdif_out_ctls(struct hda_codec *codec, hda_nid_t nid)
kctl = snd_ctl_new1(dig_mix, codec);
kctl->id.index = idx;
kctl->private_value = nid;
- err = snd_ctl_add(codec->bus->card, kctl);
+ err = snd_hda_ctl_add(codec, kctl);
if (err < 0)
return err;
}
@@ -1622,7 +1742,7 @@ int snd_hda_create_spdif_share_sw(struct hda_codec *codec,
if (!mout->dig_out_nid)
return 0;
/* ATTENTION: here mout is passed as private_data, instead of codec */
- return snd_ctl_add(codec->bus->card,
+ return snd_hda_ctl_add(codec,
snd_ctl_new1(&spdif_share_sw, mout));
}
@@ -1724,7 +1844,7 @@ int snd_hda_create_spdif_in_ctls(struct hda_codec *codec, hda_nid_t nid)
for (dig_mix = dig_in_ctls; dig_mix->name; dig_mix++) {
kctl = snd_ctl_new1(dig_mix, codec);
kctl->private_value = nid;
- err = snd_ctl_add(codec->bus->card, kctl);
+ err = snd_hda_ctl_add(codec, kctl);
if (err < 0)
return err;
}
@@ -1779,10 +1899,10 @@ int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,
/* resume the all commands from the cache */
void snd_hda_codec_resume_cache(struct hda_codec *codec)
{
- struct hda_cache_head *buffer = codec->cmd_cache.buffer;
+ struct hda_cache_head *buffer = codec->cmd_cache.buf.list;
int i;
- for (i = 0; i < codec->cmd_cache.size; i++, buffer++) {
+ for (i = 0; i < codec->cmd_cache.buf.used; i++, buffer++) {
u32 key = buffer->key;
if (!key)
continue;
@@ -1867,6 +1987,17 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
}
}
+#ifdef CONFIG_SND_HDA_HWDEP
+/* execute additional init verbs */
+static void hda_exec_init_verbs(struct hda_codec *codec)
+{
+ if (codec->init_verbs.list)
+ snd_hda_sequence_write(codec, codec->init_verbs.list);
+}
+#else
+static inline void hda_exec_init_verbs(struct hda_codec *codec) {}
+#endif
+
#ifdef SND_HDA_NEEDS_RESUME
/*
* call suspend and power-down; used both from PM and power-save
@@ -1893,6 +2024,7 @@ static void hda_call_codec_resume(struct hda_codec *codec)
hda_set_power_state(codec,
codec->afg ? codec->afg : codec->mfg,
AC_PWRST_D0);
+ hda_exec_init_verbs(codec);
if (codec->patch_ops.resume)
codec->patch_ops.resume(codec);
else {
@@ -1918,23 +2050,31 @@ int __devinit snd_hda_build_controls(struct hda_bus *bus)
struct hda_codec *codec;
list_for_each_entry(codec, &bus->codec_list, list) {
- int err = 0;
- /* fake as if already powered-on */
- hda_keep_power_on(codec);
- /* then fire up */
- hda_set_power_state(codec,
- codec->afg ? codec->afg : codec->mfg,
- AC_PWRST_D0);
- /* continue to initialize... */
- if (codec->patch_ops.init)
- err = codec->patch_ops.init(codec);
- if (!err && codec->patch_ops.build_controls)
- err = codec->patch_ops.build_controls(codec);
- snd_hda_power_down(codec);
+ int err = snd_hda_codec_build_controls(codec);
if (err < 0)
return err;
}
+ return 0;
+}
+int snd_hda_codec_build_controls(struct hda_codec *codec)
+{
+ int err = 0;
+ /* fake as if already powered-on */
+ hda_keep_power_on(codec);
+ /* then fire up */
+ hda_set_power_state(codec,
+ codec->afg ? codec->afg : codec->mfg,
+ AC_PWRST_D0);
+ hda_exec_init_verbs(codec);
+ /* continue to initialize... */
+ if (codec->patch_ops.init)
+ err = codec->patch_ops.init(codec);
+ if (!err && codec->patch_ops.build_controls)
+ err = codec->patch_ops.build_controls(codec);
+ snd_hda_power_down(codec);
+ if (err < 0)
+ return err;
return 0;
}
@@ -2235,8 +2375,8 @@ static int hda_pcm_default_cleanup(struct hda_pcm_stream *hinfo,
return 0;
}
-static int __devinit set_pcm_default_values(struct hda_codec *codec,
- struct hda_pcm_stream *info)
+static int set_pcm_default_values(struct hda_codec *codec,
+ struct hda_pcm_stream *info)
{
/* query support PCM information from the given NID */
if (info->nid && (!info->rates || !info->formats)) {
@@ -2262,6 +2402,28 @@ static int __devinit set_pcm_default_values(struct hda_codec *codec,
return 0;
}
+/*
+ * attach a new PCM stream
+ */
+static int __devinit
+snd_hda_attach_pcm(struct hda_codec *codec, struct hda_pcm *pcm)
+{
+ struct hda_pcm_stream *info;
+ int stream, err;
+
+ if (!pcm->name)
+ return -EINVAL;
+ for (stream = 0; stream < 2; stream++) {
+ info = &pcm->stream[stream];
+ if (info->substreams) {
+ err = set_pcm_default_values(codec, info);
+ if (err < 0)
+ return err;
+ }
+ }
+ return codec->bus->ops.attach_pcm(codec, pcm);
+}
+
/**
* snd_hda_build_pcms - build PCM information
* @bus: the BUS
@@ -2288,25 +2450,67 @@ static int __devinit set_pcm_default_values(struct hda_codec *codec,
*
* This function returns 0 if successfull, or a negative error code.
*/
-int __devinit snd_hda_build_pcms(struct hda_bus *bus)
+int snd_hda_build_pcms(struct hda_bus *bus)
{
+ static const char *dev_name[HDA_PCM_NTYPES] = {
+ "Audio", "SPDIF", "HDMI", "Modem"
+ };
+ /* starting device index for each PCM type */
+ static int dev_idx[HDA_PCM_NTYPES] = {
+ [HDA_PCM_TYPE_AUDIO] = 0,
+ [HDA_PCM_TYPE_SPDIF] = 1,
+ [HDA_PCM_TYPE_HDMI] = 3,
+ [HDA_PCM_TYPE_MODEM] = 6
+ };
+ /* normal audio device indices; not linear to keep compatibility */
+ static int audio_idx[4] = { 0, 2, 4, 5 };
struct hda_codec *codec;
+ int num_devs[HDA_PCM_NTYPES];
+ memset(num_devs, 0, sizeof(num_devs));
list_for_each_entry(codec, &bus->codec_list, list) {
- unsigned int pcm, s;
+ unsigned int pcm;
int err;
- if (!codec->patch_ops.build_pcms)
- continue;
- err = codec->patch_ops.build_pcms(codec);
- if (err < 0)
- return err;
+ if (!codec->num_pcms) {
+ if (!codec->patch_ops.build_pcms)
+ continue;
+ err = codec->patch_ops.build_pcms(codec);
+ if (err < 0)
+ return err;
+ }
for (pcm = 0; pcm < codec->num_pcms; pcm++) {
- for (s = 0; s < 2; s++) {
- struct hda_pcm_stream *info;
- info = &codec->pcm_info[pcm].stream[s];
- if (!info->substreams)
+ struct hda_pcm *cpcm = &codec->pcm_info[pcm];
+ int type = cpcm->pcm_type;
+ int dev;
+ switch (type) {
+ case HDA_PCM_TYPE_AUDIO:
+ if (num_devs[type] >= ARRAY_SIZE(audio_idx)) {
+ snd_printk(KERN_WARNING
+ "Too many audio devices\n");
continue;
- err = set_pcm_default_values(codec, info);
+ }
+ dev = audio_idx[num_devs[type]];
+ break;
+ case HDA_PCM_TYPE_SPDIF:
+ case HDA_PCM_TYPE_HDMI:
+ case HDA_PCM_TYPE_MODEM:
+ if (num_devs[type]) {
+ snd_printk(KERN_WARNING
+ "%s already defined\n",
+ dev_name[type]);
+ continue;
+ }
+ dev = dev_idx[type];
+ break;
+ default:
+ snd_printk(KERN_WARNING
+ "Invalid PCM type %d\n", type);
+ continue;
+ }
+ num_devs[type]++;
+ if (!cpcm->pcm) {
+ cpcm->device = dev;
+ err = snd_hda_attach_pcm(codec, cpcm);
if (err < 0)
return err;
}
@@ -2332,11 +2536,11 @@ int snd_hda_check_board_config(struct hda_codec *codec,
int num_configs, const char **models,
const struct snd_pci_quirk *tbl)
{
- if (codec->bus->modelname && models) {
+ if (codec->modelname && models) {
int i;
for (i = 0; i < num_configs; i++) {
if (models[i] &&
- !strcmp(codec->bus->modelname, models[i])) {
+ !strcmp(codec->modelname, models[i])) {
snd_printd(KERN_INFO "hda_codec: model '%s' is "
"selected\n", models[i]);
return i;
@@ -2389,7 +2593,7 @@ int snd_hda_add_new_ctls(struct hda_codec *codec, struct snd_kcontrol_new *knew)
kctl = snd_ctl_new1(knew, codec);
if (!kctl)
return -ENOMEM;
- err = snd_ctl_add(codec->bus->card, kctl);
+ err = snd_hda_ctl_add(codec, kctl);
if (err < 0) {
if (!codec->addr)
return err;
@@ -2397,7 +2601,7 @@ int snd_hda_add_new_ctls(struct hda_codec *codec, struct snd_kcontrol_new *knew)
if (!kctl)
return -ENOMEM;
kctl->id.device = codec->addr;
- err = snd_ctl_add(codec->bus->card, kctl);
+ err = snd_hda_ctl_add(codec, kctl);
if (err < 0)
return err;
}
@@ -3138,3 +3342,37 @@ int snd_hda_codecs_inuse(struct hda_bus *bus)
}
#endif
#endif
+
+/*
+ * generic arrays
+ */
+
+/* get a new element from the given array
+ * if it exceeds the pre-allocated array size, re-allocate the array
+ */
+void *snd_array_new(struct snd_array *array)
+{
+ if (array->used >= array->alloced) {
+ int num = array->alloced + array->alloc_align;
+ void *nlist = kcalloc(num + 1, array->elem_size, GFP_KERNEL);
+ if (!nlist)
+ return NULL;
+ if (array->list) {
+ memcpy(nlist, array->list,
+ array->elem_size * array->alloced);
+ kfree(array->list);
+ }
+ array->list = nlist;
+ array->alloced = num;
+ }
+ return array->list + (array->used++ * array->elem_size);
+}
+
+/* free the given array elements */
+void snd_array_free(struct snd_array *array)
+{
+ kfree(array->list);
+ array->used = 0;
+ array->alloced = 0;
+ array->list = NULL;
+}