![Takashi Iwai](/assets/img/avatar_default.png)
A few multiple codec drivers do renaming the chip_name string but all these are open-coded and some of them have even no error check. Let's make common helpers to do it properly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
807 lines
19 KiB
C
807 lines
19 KiB
C
/*
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* sysfs interface for HD-audio codec
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*
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* Copyright (c) 2014 Takashi Iwai <tiwai@suse.de>
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*
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* split from hda_hwdep.c
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/compat.h>
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#include <linux/mutex.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/export.h>
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#include <sound/core.h>
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#include "hda_codec.h"
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#include "hda_local.h"
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#include <sound/hda_hwdep.h>
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#include <sound/minors.h>
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/* hint string pair */
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struct hda_hint {
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const char *key;
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const char *val; /* contained in the same alloc as key */
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};
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#ifdef CONFIG_PM
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static ssize_t power_on_acct_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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snd_hda_update_power_acct(codec);
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return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
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}
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static ssize_t power_off_acct_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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snd_hda_update_power_acct(codec);
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return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
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}
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static DEVICE_ATTR_RO(power_on_acct);
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static DEVICE_ATTR_RO(power_off_acct);
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#endif /* CONFIG_PM */
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#define CODEC_INFO_SHOW(type, field) \
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static ssize_t type##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct hda_codec *codec = dev_get_drvdata(dev); \
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return sprintf(buf, "0x%x\n", codec->field); \
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}
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#define CODEC_INFO_STR_SHOW(type, field) \
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static ssize_t type##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct hda_codec *codec = dev_get_drvdata(dev); \
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return sprintf(buf, "%s\n", \
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codec->field ? codec->field : ""); \
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}
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CODEC_INFO_SHOW(vendor_id, core.vendor_id);
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CODEC_INFO_SHOW(subsystem_id, core.subsystem_id);
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CODEC_INFO_SHOW(revision_id, core.revision_id);
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CODEC_INFO_SHOW(afg, core.afg);
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CODEC_INFO_SHOW(mfg, core.mfg);
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CODEC_INFO_STR_SHOW(vendor_name, core.vendor_name);
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CODEC_INFO_STR_SHOW(chip_name, core.chip_name);
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CODEC_INFO_STR_SHOW(modelname, modelname);
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static ssize_t pin_configs_show(struct hda_codec *codec,
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struct snd_array *list,
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char *buf)
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{
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int i, len = 0;
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mutex_lock(&codec->user_mutex);
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for (i = 0; i < list->used; i++) {
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struct hda_pincfg *pin = snd_array_elem(list, i);
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len += sprintf(buf + len, "0x%02x 0x%08x\n",
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pin->nid, pin->cfg);
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}
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mutex_unlock(&codec->user_mutex);
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return len;
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}
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static ssize_t init_pin_configs_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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return pin_configs_show(codec, &codec->init_pins, buf);
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}
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static ssize_t driver_pin_configs_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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return pin_configs_show(codec, &codec->driver_pins, buf);
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}
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#ifdef CONFIG_SND_HDA_RECONFIG
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/*
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* sysfs interface
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*/
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static int clear_codec(struct hda_codec *codec)
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{
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int err;
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err = snd_hda_codec_reset(codec);
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if (err < 0) {
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codec_err(codec, "The codec is being used, can't free.\n");
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return err;
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}
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snd_hda_sysfs_clear(codec);
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return 0;
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}
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static int reconfig_codec(struct hda_codec *codec)
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{
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int err;
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snd_hda_power_up(codec);
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codec_info(codec, "hda-codec: reconfiguring\n");
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err = snd_hda_codec_reset(codec);
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if (err < 0) {
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codec_err(codec,
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"The codec is being used, can't reconfigure.\n");
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goto error;
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}
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err = snd_hda_codec_configure(codec);
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if (err < 0)
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goto error;
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/* rebuild PCMs */
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err = snd_hda_codec_build_pcms(codec);
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if (err < 0)
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goto error;
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/* rebuild mixers */
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err = snd_hda_codec_build_controls(codec);
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if (err < 0)
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goto error;
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err = snd_card_register(codec->card);
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error:
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snd_hda_power_down(codec);
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return err;
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}
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/*
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* allocate a string at most len chars, and remove the trailing EOL
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*/
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static char *kstrndup_noeol(const char *src, size_t len)
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{
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char *s = kstrndup(src, len, GFP_KERNEL);
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char *p;
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if (!s)
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return NULL;
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p = strchr(s, '\n');
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if (p)
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*p = 0;
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return s;
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}
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#define CODEC_INFO_STORE(type, field) \
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static ssize_t type##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct hda_codec *codec = dev_get_drvdata(dev); \
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unsigned long val; \
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int err = kstrtoul(buf, 0, &val); \
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if (err < 0) \
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return err; \
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codec->field = val; \
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return count; \
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}
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#define CODEC_INFO_STR_STORE(type, field) \
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static ssize_t type##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct hda_codec *codec = dev_get_drvdata(dev); \
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char *s = kstrndup_noeol(buf, 64); \
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if (!s) \
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return -ENOMEM; \
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kfree(codec->field); \
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codec->field = s; \
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return count; \
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}
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CODEC_INFO_STORE(vendor_id, core.vendor_id);
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CODEC_INFO_STORE(subsystem_id, core.subsystem_id);
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CODEC_INFO_STORE(revision_id, core.revision_id);
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CODEC_INFO_STR_STORE(vendor_name, core.vendor_name);
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CODEC_INFO_STR_STORE(chip_name, core.chip_name);
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CODEC_INFO_STR_STORE(modelname, modelname);
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#define CODEC_ACTION_STORE(type) \
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static ssize_t type##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct hda_codec *codec = dev_get_drvdata(dev); \
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int err = 0; \
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if (*buf) \
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err = type##_codec(codec); \
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return err < 0 ? err : count; \
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}
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CODEC_ACTION_STORE(reconfig);
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CODEC_ACTION_STORE(clear);
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static ssize_t init_verbs_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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int i, len = 0;
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mutex_lock(&codec->user_mutex);
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for (i = 0; i < codec->init_verbs.used; i++) {
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struct hda_verb *v = snd_array_elem(&codec->init_verbs, i);
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len += snprintf(buf + len, PAGE_SIZE - len,
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"0x%02x 0x%03x 0x%04x\n",
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v->nid, v->verb, v->param);
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}
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mutex_unlock(&codec->user_mutex);
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return len;
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}
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static int parse_init_verbs(struct hda_codec *codec, const char *buf)
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{
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struct hda_verb *v;
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int nid, verb, param;
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if (sscanf(buf, "%i %i %i", &nid, &verb, ¶m) != 3)
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return -EINVAL;
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if (!nid || !verb)
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return -EINVAL;
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mutex_lock(&codec->user_mutex);
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v = snd_array_new(&codec->init_verbs);
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if (!v) {
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mutex_unlock(&codec->user_mutex);
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return -ENOMEM;
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}
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v->nid = nid;
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v->verb = verb;
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v->param = param;
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mutex_unlock(&codec->user_mutex);
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return 0;
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}
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static ssize_t init_verbs_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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int err = parse_init_verbs(codec, buf);
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if (err < 0)
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return err;
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return count;
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}
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static ssize_t hints_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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int i, len = 0;
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mutex_lock(&codec->user_mutex);
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for (i = 0; i < codec->hints.used; i++) {
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struct hda_hint *hint = snd_array_elem(&codec->hints, i);
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len += snprintf(buf + len, PAGE_SIZE - len,
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"%s = %s\n", hint->key, hint->val);
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}
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mutex_unlock(&codec->user_mutex);
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return len;
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}
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static struct hda_hint *get_hint(struct hda_codec *codec, const char *key)
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{
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int i;
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for (i = 0; i < codec->hints.used; i++) {
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struct hda_hint *hint = snd_array_elem(&codec->hints, i);
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if (!strcmp(hint->key, key))
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return hint;
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}
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return NULL;
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}
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static void remove_trail_spaces(char *str)
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{
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char *p;
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if (!*str)
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return;
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p = str + strlen(str) - 1;
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for (; isspace(*p); p--) {
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*p = 0;
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if (p == str)
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return;
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}
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}
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#define MAX_HINTS 1024
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static int parse_hints(struct hda_codec *codec, const char *buf)
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{
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char *key, *val;
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struct hda_hint *hint;
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int err = 0;
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buf = skip_spaces(buf);
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if (!*buf || *buf == '#' || *buf == '\n')
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return 0;
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if (*buf == '=')
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return -EINVAL;
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key = kstrndup_noeol(buf, 1024);
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if (!key)
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return -ENOMEM;
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/* extract key and val */
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val = strchr(key, '=');
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if (!val) {
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kfree(key);
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return -EINVAL;
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}
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*val++ = 0;
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val = skip_spaces(val);
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remove_trail_spaces(key);
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remove_trail_spaces(val);
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mutex_lock(&codec->user_mutex);
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hint = get_hint(codec, key);
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if (hint) {
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/* replace */
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kfree(hint->key);
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hint->key = key;
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hint->val = val;
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goto unlock;
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}
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/* allocate a new hint entry */
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if (codec->hints.used >= MAX_HINTS)
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hint = NULL;
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else
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hint = snd_array_new(&codec->hints);
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if (hint) {
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hint->key = key;
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hint->val = val;
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} else {
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err = -ENOMEM;
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}
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unlock:
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mutex_unlock(&codec->user_mutex);
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if (err)
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kfree(key);
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return err;
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}
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static ssize_t hints_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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int err = parse_hints(codec, buf);
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if (err < 0)
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return err;
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return count;
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}
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static ssize_t user_pin_configs_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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return pin_configs_show(codec, &codec->user_pins, buf);
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}
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#define MAX_PIN_CONFIGS 32
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static int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
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{
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int nid, cfg, err;
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if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
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return -EINVAL;
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if (!nid)
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return -EINVAL;
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mutex_lock(&codec->user_mutex);
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err = snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
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mutex_unlock(&codec->user_mutex);
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return err;
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}
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static ssize_t user_pin_configs_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct hda_codec *codec = dev_get_drvdata(dev);
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int err = parse_user_pin_configs(codec, buf);
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if (err < 0)
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return err;
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return count;
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}
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/* sysfs attributes exposed only when CONFIG_SND_HDA_RECONFIG=y */
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static DEVICE_ATTR_RW(init_verbs);
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static DEVICE_ATTR_RW(hints);
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static DEVICE_ATTR_RW(user_pin_configs);
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static DEVICE_ATTR_WO(reconfig);
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static DEVICE_ATTR_WO(clear);
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/**
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* snd_hda_get_hint - Look for hint string
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* @codec: the HDA codec
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* @key: the hint key string
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*
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* Look for a hint key/value pair matching with the given key string
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* and returns the value string. If nothing found, returns NULL.
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*/
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const char *snd_hda_get_hint(struct hda_codec *codec, const char *key)
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{
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struct hda_hint *hint = get_hint(codec, key);
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return hint ? hint->val : NULL;
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}
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EXPORT_SYMBOL_GPL(snd_hda_get_hint);
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/**
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* snd_hda_get_bool_hint - Get a boolean hint value
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* @codec: the HDA codec
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* @key: the hint key string
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*
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* Look for a hint key/value pair matching with the given key string
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* and returns a boolean value parsed from the value. If no matching
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* key is found, return a negative value.
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*/
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int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key)
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{
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const char *p;
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int ret;
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mutex_lock(&codec->user_mutex);
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p = snd_hda_get_hint(codec, key);
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if (!p || !*p)
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ret = -ENOENT;
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else {
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switch (toupper(*p)) {
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case 'T': /* true */
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case 'Y': /* yes */
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case '1':
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ret = 1;
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break;
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default:
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ret = 0;
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break;
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}
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}
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mutex_unlock(&codec->user_mutex);
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return ret;
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}
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EXPORT_SYMBOL_GPL(snd_hda_get_bool_hint);
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/**
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* snd_hda_get_int_hint - Get an integer hint value
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* @codec: the HDA codec
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* @key: the hint key string
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* @valp: pointer to store a value
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*
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* Look for a hint key/value pair matching with the given key string
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* and stores the integer value to @valp. If no matching key is found,
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* return a negative error code. Otherwise it returns zero.
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*/
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int snd_hda_get_int_hint(struct hda_codec *codec, const char *key, int *valp)
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{
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const char *p;
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unsigned long val;
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int ret;
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mutex_lock(&codec->user_mutex);
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p = snd_hda_get_hint(codec, key);
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if (!p)
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ret = -ENOENT;
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else if (kstrtoul(p, 0, &val))
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ret = -EINVAL;
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else {
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*valp = val;
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ret = 0;
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}
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mutex_unlock(&codec->user_mutex);
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return ret;
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}
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EXPORT_SYMBOL_GPL(snd_hda_get_int_hint);
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#endif /* CONFIG_SND_HDA_RECONFIG */
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/*
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* common sysfs attributes
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*/
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#ifdef CONFIG_SND_HDA_RECONFIG
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#define RECONFIG_DEVICE_ATTR(name) DEVICE_ATTR_RW(name)
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#else
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#define RECONFIG_DEVICE_ATTR(name) DEVICE_ATTR_RO(name)
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#endif
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static RECONFIG_DEVICE_ATTR(vendor_id);
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static RECONFIG_DEVICE_ATTR(subsystem_id);
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static RECONFIG_DEVICE_ATTR(revision_id);
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static DEVICE_ATTR_RO(afg);
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static DEVICE_ATTR_RO(mfg);
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static RECONFIG_DEVICE_ATTR(vendor_name);
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|
static RECONFIG_DEVICE_ATTR(chip_name);
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static RECONFIG_DEVICE_ATTR(modelname);
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static DEVICE_ATTR_RO(init_pin_configs);
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static DEVICE_ATTR_RO(driver_pin_configs);
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|
|
|
|
|
#ifdef CONFIG_SND_HDA_PATCH_LOADER
|
|
|
|
/* parser mode */
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|
enum {
|
|
LINE_MODE_NONE,
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|
LINE_MODE_CODEC,
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|
LINE_MODE_MODEL,
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|
LINE_MODE_PINCFG,
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|
LINE_MODE_VERB,
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|
LINE_MODE_HINT,
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|
LINE_MODE_VENDOR_ID,
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|
LINE_MODE_SUBSYSTEM_ID,
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|
LINE_MODE_REVISION_ID,
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|
LINE_MODE_CHIP_NAME,
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|
NUM_LINE_MODES,
|
|
};
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|
|
|
static inline int strmatch(const char *a, const char *b)
|
|
{
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return strncasecmp(a, b, strlen(b)) == 0;
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|
}
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|
|
|
/* parse the contents after the line "[codec]"
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|
* accept only the line with three numbers, and assign the current codec
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|
*/
|
|
static void parse_codec_mode(char *buf, struct hda_bus *bus,
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|
struct hda_codec **codecp)
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|
{
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|
int vendorid, subid, caddr;
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|
struct hda_codec *codec;
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|
|
|
*codecp = NULL;
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|
if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) {
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|
list_for_each_codec(codec, bus) {
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|
if ((vendorid <= 0 || codec->core.vendor_id == vendorid) &&
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|
(subid <= 0 || codec->core.subsystem_id == subid) &&
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|
codec->core.addr == caddr) {
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|
*codecp = codec;
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|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* parse the contents after the other command tags, [pincfg], [verb],
|
|
* [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model]
|
|
* just pass to the sysfs helper (only when any codec was specified)
|
|
*/
|
|
static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
|
|
struct hda_codec **codecp)
|
|
{
|
|
parse_user_pin_configs(*codecp, buf);
|
|
}
|
|
|
|
static void parse_verb_mode(char *buf, struct hda_bus *bus,
|
|
struct hda_codec **codecp)
|
|
{
|
|
parse_init_verbs(*codecp, buf);
|
|
}
|
|
|
|
static void parse_hint_mode(char *buf, struct hda_bus *bus,
|
|
struct hda_codec **codecp)
|
|
{
|
|
parse_hints(*codecp, buf);
|
|
}
|
|
|
|
static void parse_model_mode(char *buf, struct hda_bus *bus,
|
|
struct hda_codec **codecp)
|
|
{
|
|
kfree((*codecp)->modelname);
|
|
(*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
|
|
}
|
|
|
|
static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
|
|
struct hda_codec **codecp)
|
|
{
|
|
snd_hda_codec_set_name(*codecp, buf);
|
|
}
|
|
|
|
#define DEFINE_PARSE_ID_MODE(name) \
|
|
static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
|
|
struct hda_codec **codecp) \
|
|
{ \
|
|
unsigned long val; \
|
|
if (!kstrtoul(buf, 0, &val)) \
|
|
(*codecp)->core.name = val; \
|
|
}
|
|
|
|
DEFINE_PARSE_ID_MODE(vendor_id);
|
|
DEFINE_PARSE_ID_MODE(subsystem_id);
|
|
DEFINE_PARSE_ID_MODE(revision_id);
|
|
|
|
|
|
struct hda_patch_item {
|
|
const char *tag;
|
|
const char *alias;
|
|
void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
|
|
};
|
|
|
|
static struct hda_patch_item patch_items[NUM_LINE_MODES] = {
|
|
[LINE_MODE_CODEC] = {
|
|
.tag = "[codec]",
|
|
.parser = parse_codec_mode,
|
|
},
|
|
[LINE_MODE_MODEL] = {
|
|
.tag = "[model]",
|
|
.parser = parse_model_mode,
|
|
},
|
|
[LINE_MODE_VERB] = {
|
|
.tag = "[verb]",
|
|
.alias = "[init_verbs]",
|
|
.parser = parse_verb_mode,
|
|
},
|
|
[LINE_MODE_PINCFG] = {
|
|
.tag = "[pincfg]",
|
|
.alias = "[user_pin_configs]",
|
|
.parser = parse_pincfg_mode,
|
|
},
|
|
[LINE_MODE_HINT] = {
|
|
.tag = "[hint]",
|
|
.alias = "[hints]",
|
|
.parser = parse_hint_mode
|
|
},
|
|
[LINE_MODE_VENDOR_ID] = {
|
|
.tag = "[vendor_id]",
|
|
.parser = parse_vendor_id_mode,
|
|
},
|
|
[LINE_MODE_SUBSYSTEM_ID] = {
|
|
.tag = "[subsystem_id]",
|
|
.parser = parse_subsystem_id_mode,
|
|
},
|
|
[LINE_MODE_REVISION_ID] = {
|
|
.tag = "[revision_id]",
|
|
.parser = parse_revision_id_mode,
|
|
},
|
|
[LINE_MODE_CHIP_NAME] = {
|
|
.tag = "[chip_name]",
|
|
.parser = parse_chip_name_mode,
|
|
},
|
|
};
|
|
|
|
/* check the line starting with '[' -- change the parser mode accodingly */
|
|
static int parse_line_mode(char *buf, struct hda_bus *bus)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(patch_items); i++) {
|
|
if (!patch_items[i].tag)
|
|
continue;
|
|
if (strmatch(buf, patch_items[i].tag))
|
|
return i;
|
|
if (patch_items[i].alias && strmatch(buf, patch_items[i].alias))
|
|
return i;
|
|
}
|
|
return LINE_MODE_NONE;
|
|
}
|
|
|
|
/* copy one line from the buffer in fw, and update the fields in fw
|
|
* return zero if it reaches to the end of the buffer, or non-zero
|
|
* if successfully copied a line
|
|
*
|
|
* the spaces at the beginning and the end of the line are stripped
|
|
*/
|
|
static int get_line_from_fw(char *buf, int size, size_t *fw_size_p,
|
|
const void **fw_data_p)
|
|
{
|
|
int len;
|
|
size_t fw_size = *fw_size_p;
|
|
const char *p = *fw_data_p;
|
|
|
|
while (isspace(*p) && fw_size) {
|
|
p++;
|
|
fw_size--;
|
|
}
|
|
if (!fw_size)
|
|
return 0;
|
|
|
|
for (len = 0; len < fw_size; len++) {
|
|
if (!*p)
|
|
break;
|
|
if (*p == '\n') {
|
|
p++;
|
|
len++;
|
|
break;
|
|
}
|
|
if (len < size)
|
|
*buf++ = *p++;
|
|
}
|
|
*buf = 0;
|
|
*fw_size_p = fw_size - len;
|
|
*fw_data_p = p;
|
|
remove_trail_spaces(buf);
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* snd_hda_load_patch - load a "patch" firmware file and parse it
|
|
* @bus: HD-audio bus
|
|
* @fw_size: the firmware byte size
|
|
* @fw_buf: the firmware data
|
|
*/
|
|
int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf)
|
|
{
|
|
char buf[128];
|
|
struct hda_codec *codec;
|
|
int line_mode;
|
|
|
|
line_mode = LINE_MODE_NONE;
|
|
codec = NULL;
|
|
while (get_line_from_fw(buf, sizeof(buf) - 1, &fw_size, &fw_buf)) {
|
|
if (!*buf || *buf == '#' || *buf == '\n')
|
|
continue;
|
|
if (*buf == '[')
|
|
line_mode = parse_line_mode(buf, bus);
|
|
else if (patch_items[line_mode].parser &&
|
|
(codec || line_mode <= LINE_MODE_CODEC))
|
|
patch_items[line_mode].parser(buf, bus, &codec);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_load_patch);
|
|
#endif /* CONFIG_SND_HDA_PATCH_LOADER */
|
|
|
|
/*
|
|
* sysfs entries
|
|
*/
|
|
static struct attribute *hda_dev_attrs[] = {
|
|
&dev_attr_vendor_id.attr,
|
|
&dev_attr_subsystem_id.attr,
|
|
&dev_attr_revision_id.attr,
|
|
&dev_attr_afg.attr,
|
|
&dev_attr_mfg.attr,
|
|
&dev_attr_vendor_name.attr,
|
|
&dev_attr_chip_name.attr,
|
|
&dev_attr_modelname.attr,
|
|
&dev_attr_init_pin_configs.attr,
|
|
&dev_attr_driver_pin_configs.attr,
|
|
#ifdef CONFIG_PM
|
|
&dev_attr_power_on_acct.attr,
|
|
&dev_attr_power_off_acct.attr,
|
|
#endif
|
|
#ifdef CONFIG_SND_HDA_RECONFIG
|
|
&dev_attr_init_verbs.attr,
|
|
&dev_attr_hints.attr,
|
|
&dev_attr_user_pin_configs.attr,
|
|
&dev_attr_reconfig.attr,
|
|
&dev_attr_clear.attr,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group hda_dev_attr_group = {
|
|
.attrs = hda_dev_attrs,
|
|
};
|
|
|
|
const struct attribute_group *snd_hda_dev_attr_groups[] = {
|
|
&hda_dev_attr_group,
|
|
NULL
|
|
};
|
|
|
|
void snd_hda_sysfs_init(struct hda_codec *codec)
|
|
{
|
|
mutex_init(&codec->user_mutex);
|
|
#ifdef CONFIG_SND_HDA_RECONFIG
|
|
snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
|
|
snd_array_init(&codec->hints, sizeof(struct hda_hint), 32);
|
|
snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16);
|
|
#endif
|
|
}
|
|
|
|
void snd_hda_sysfs_clear(struct hda_codec *codec)
|
|
{
|
|
#ifdef CONFIG_SND_HDA_RECONFIG
|
|
int i;
|
|
|
|
/* clear init verbs */
|
|
snd_array_free(&codec->init_verbs);
|
|
/* clear hints */
|
|
for (i = 0; i < codec->hints.used; i++) {
|
|
struct hda_hint *hint = snd_array_elem(&codec->hints, i);
|
|
kfree(hint->key); /* we don't need to free hint->val */
|
|
}
|
|
snd_array_free(&codec->hints);
|
|
snd_array_free(&codec->user_pins);
|
|
#endif
|
|
}
|