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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /sound/pci/hda/hda_sysfs.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/pci/hda/hda_sysfs.c')
-rw-r--r-- | sound/pci/hda/hda_sysfs.c | 796 |
1 files changed, 796 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_sysfs.c b/sound/pci/hda/hda_sysfs.c new file mode 100644 index 000000000..69ebc37a4 --- /dev/null +++ b/sound/pci/hda/hda_sysfs.c @@ -0,0 +1,796 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * sysfs interface for HD-audio codec + * + * Copyright (c) 2014 Takashi Iwai <tiwai@suse.de> + * + * split from hda_hwdep.c + */ + +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/compat.h> +#include <linux/mutex.h> +#include <linux/ctype.h> +#include <linux/string.h> +#include <linux/export.h> +#include <sound/core.h> +#include <sound/hda_codec.h> +#include "hda_local.h" +#include <sound/hda_hwdep.h> +#include <sound/minors.h> + +/* hint string pair */ +struct hda_hint { + const char *key; + const char *val; /* contained in the same alloc as key */ +}; + +#ifdef CONFIG_PM +static ssize_t power_on_acct_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + snd_hda_update_power_acct(codec); + return sysfs_emit(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct)); +} + +static ssize_t power_off_acct_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + snd_hda_update_power_acct(codec); + return sysfs_emit(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct)); +} + +static DEVICE_ATTR_RO(power_on_acct); +static DEVICE_ATTR_RO(power_off_acct); +#endif /* CONFIG_PM */ + +#define CODEC_INFO_SHOW(type, field) \ +static ssize_t type##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct hda_codec *codec = dev_get_drvdata(dev); \ + return sysfs_emit(buf, "0x%x\n", codec->field); \ +} + +#define CODEC_INFO_STR_SHOW(type, field) \ +static ssize_t type##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct hda_codec *codec = dev_get_drvdata(dev); \ + return sysfs_emit(buf, "%s\n", \ + codec->field ? codec->field : ""); \ +} + +CODEC_INFO_SHOW(vendor_id, core.vendor_id); +CODEC_INFO_SHOW(subsystem_id, core.subsystem_id); +CODEC_INFO_SHOW(revision_id, core.revision_id); +CODEC_INFO_SHOW(afg, core.afg); +CODEC_INFO_SHOW(mfg, core.mfg); +CODEC_INFO_STR_SHOW(vendor_name, core.vendor_name); +CODEC_INFO_STR_SHOW(chip_name, core.chip_name); +CODEC_INFO_STR_SHOW(modelname, modelname); + +static ssize_t pin_configs_show(struct hda_codec *codec, + struct snd_array *list, + char *buf) +{ + const struct hda_pincfg *pin; + int i, len = 0; + mutex_lock(&codec->user_mutex); + snd_array_for_each(list, i, pin) { + len += sysfs_emit_at(buf, len, "0x%02x 0x%08x\n", + pin->nid, pin->cfg); + } + mutex_unlock(&codec->user_mutex); + return len; +} + +static ssize_t init_pin_configs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + return pin_configs_show(codec, &codec->init_pins, buf); +} + +static ssize_t driver_pin_configs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + return pin_configs_show(codec, &codec->driver_pins, buf); +} + +#ifdef CONFIG_SND_HDA_RECONFIG + +/* + * sysfs interface + */ + +static int clear_codec(struct hda_codec *codec) +{ + int err; + + err = snd_hda_codec_reset(codec); + if (err < 0) { + codec_err(codec, "The codec is being used, can't free.\n"); + return err; + } + snd_hda_sysfs_clear(codec); + return 0; +} + +static int reconfig_codec(struct hda_codec *codec) +{ + int err; + + snd_hda_power_up(codec); + codec_info(codec, "hda-codec: reconfiguring\n"); + err = snd_hda_codec_reset(codec); + if (err < 0) { + codec_err(codec, + "The codec is being used, can't reconfigure.\n"); + goto error; + } + err = device_reprobe(hda_codec_dev(codec)); + if (err < 0) + goto error; + err = snd_card_register(codec->card); + error: + snd_hda_power_down(codec); + return err; +} + +/* + * allocate a string at most len chars, and remove the trailing EOL + */ +static char *kstrndup_noeol(const char *src, size_t len) +{ + char *s = kstrndup(src, len, GFP_KERNEL); + char *p; + if (!s) + return NULL; + p = strchr(s, '\n'); + if (p) + *p = 0; + return s; +} + +#define CODEC_INFO_STORE(type, field) \ +static ssize_t type##_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct hda_codec *codec = dev_get_drvdata(dev); \ + unsigned long val; \ + int err = kstrtoul(buf, 0, &val); \ + if (err < 0) \ + return err; \ + codec->field = val; \ + return count; \ +} + +#define CODEC_INFO_STR_STORE(type, field) \ +static ssize_t type##_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct hda_codec *codec = dev_get_drvdata(dev); \ + char *s = kstrndup_noeol(buf, 64); \ + if (!s) \ + return -ENOMEM; \ + kfree(codec->field); \ + codec->field = s; \ + return count; \ +} + +CODEC_INFO_STORE(vendor_id, core.vendor_id); +CODEC_INFO_STORE(subsystem_id, core.subsystem_id); +CODEC_INFO_STORE(revision_id, core.revision_id); +CODEC_INFO_STR_STORE(vendor_name, core.vendor_name); +CODEC_INFO_STR_STORE(chip_name, core.chip_name); +CODEC_INFO_STR_STORE(modelname, modelname); + +#define CODEC_ACTION_STORE(type) \ +static ssize_t type##_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct hda_codec *codec = dev_get_drvdata(dev); \ + int err = 0; \ + if (*buf) \ + err = type##_codec(codec); \ + return err < 0 ? err : count; \ +} + +CODEC_ACTION_STORE(reconfig); +CODEC_ACTION_STORE(clear); + +static ssize_t init_verbs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + const struct hda_verb *v; + int i, len = 0; + mutex_lock(&codec->user_mutex); + snd_array_for_each(&codec->init_verbs, i, v) { + len += sysfs_emit_at(buf, len, "0x%02x 0x%03x 0x%04x\n", + v->nid, v->verb, v->param); + } + mutex_unlock(&codec->user_mutex); + return len; +} + +static int parse_init_verbs(struct hda_codec *codec, const char *buf) +{ + struct hda_verb *v; + int nid, verb, param; + + if (sscanf(buf, "%i %i %i", &nid, &verb, ¶m) != 3) + return -EINVAL; + if (!nid || !verb) + return -EINVAL; + mutex_lock(&codec->user_mutex); + v = snd_array_new(&codec->init_verbs); + if (!v) { + mutex_unlock(&codec->user_mutex); + return -ENOMEM; + } + v->nid = nid; + v->verb = verb; + v->param = param; + mutex_unlock(&codec->user_mutex); + return 0; +} + +static ssize_t init_verbs_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + int err = parse_init_verbs(codec, buf); + if (err < 0) + return err; + return count; +} + +static ssize_t hints_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + const struct hda_hint *hint; + int i, len = 0; + mutex_lock(&codec->user_mutex); + snd_array_for_each(&codec->hints, i, hint) { + len += sysfs_emit_at(buf, len, "%s = %s\n", + hint->key, hint->val); + } + mutex_unlock(&codec->user_mutex); + return len; +} + +static struct hda_hint *get_hint(struct hda_codec *codec, const char *key) +{ + struct hda_hint *hint; + int i; + + snd_array_for_each(&codec->hints, i, hint) { + if (!strcmp(hint->key, key)) + return hint; + } + return NULL; +} + +static void remove_trail_spaces(char *str) +{ + char *p; + if (!*str) + return; + p = str + strlen(str) - 1; + for (; isspace(*p); p--) { + *p = 0; + if (p == str) + return; + } +} + +#define MAX_HINTS 1024 + +static int parse_hints(struct hda_codec *codec, const char *buf) +{ + char *key, *val; + struct hda_hint *hint; + int err = 0; + + buf = skip_spaces(buf); + if (!*buf || *buf == '#' || *buf == '\n') + return 0; + if (*buf == '=') + return -EINVAL; + key = kstrndup_noeol(buf, 1024); + if (!key) + return -ENOMEM; + /* extract key and val */ + val = strchr(key, '='); + if (!val) { + kfree(key); + return -EINVAL; + } + *val++ = 0; + val = skip_spaces(val); + remove_trail_spaces(key); + remove_trail_spaces(val); + mutex_lock(&codec->user_mutex); + hint = get_hint(codec, key); + if (hint) { + /* replace */ + kfree(hint->key); + hint->key = key; + hint->val = val; + goto unlock; + } + /* allocate a new hint entry */ + if (codec->hints.used >= MAX_HINTS) + hint = NULL; + else + hint = snd_array_new(&codec->hints); + if (hint) { + hint->key = key; + hint->val = val; + } else { + err = -ENOMEM; + } + unlock: + mutex_unlock(&codec->user_mutex); + if (err) + kfree(key); + return err; +} + +static ssize_t hints_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + int err = parse_hints(codec, buf); + if (err < 0) + return err; + return count; +} + +static ssize_t user_pin_configs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + return pin_configs_show(codec, &codec->user_pins, buf); +} + +static int parse_user_pin_configs(struct hda_codec *codec, const char *buf) +{ + int nid, cfg, err; + + if (sscanf(buf, "%i %i", &nid, &cfg) != 2) + return -EINVAL; + if (!nid) + return -EINVAL; + mutex_lock(&codec->user_mutex); + err = snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg); + mutex_unlock(&codec->user_mutex); + return err; +} + +static ssize_t user_pin_configs_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hda_codec *codec = dev_get_drvdata(dev); + int err = parse_user_pin_configs(codec, buf); + if (err < 0) + return err; + return count; +} + +/* sysfs attributes exposed only when CONFIG_SND_HDA_RECONFIG=y */ +static DEVICE_ATTR_RW(init_verbs); +static DEVICE_ATTR_RW(hints); +static DEVICE_ATTR_RW(user_pin_configs); +static DEVICE_ATTR_WO(reconfig); +static DEVICE_ATTR_WO(clear); + +/** + * snd_hda_get_hint - Look for hint string + * @codec: the HDA codec + * @key: the hint key string + * + * Look for a hint key/value pair matching with the given key string + * and returns the value string. If nothing found, returns NULL. + */ +const char *snd_hda_get_hint(struct hda_codec *codec, const char *key) +{ + struct hda_hint *hint = get_hint(codec, key); + return hint ? hint->val : NULL; +} +EXPORT_SYMBOL_GPL(snd_hda_get_hint); + +/** + * snd_hda_get_bool_hint - Get a boolean hint value + * @codec: the HDA codec + * @key: the hint key string + * + * Look for a hint key/value pair matching with the given key string + * and returns a boolean value parsed from the value. If no matching + * key is found, return a negative value. + */ +int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key) +{ + const char *p; + int ret; + + mutex_lock(&codec->user_mutex); + p = snd_hda_get_hint(codec, key); + if (!p || !*p) + ret = -ENOENT; + else { + switch (toupper(*p)) { + case 'T': /* true */ + case 'Y': /* yes */ + case '1': + ret = 1; + break; + default: + ret = 0; + break; + } + } + mutex_unlock(&codec->user_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(snd_hda_get_bool_hint); + +/** + * snd_hda_get_int_hint - Get an integer hint value + * @codec: the HDA codec + * @key: the hint key string + * @valp: pointer to store a value + * + * Look for a hint key/value pair matching with the given key string + * and stores the integer value to @valp. If no matching key is found, + * return a negative error code. Otherwise it returns zero. + */ +int snd_hda_get_int_hint(struct hda_codec *codec, const char *key, int *valp) +{ + const char *p; + unsigned long val; + int ret; + + mutex_lock(&codec->user_mutex); + p = snd_hda_get_hint(codec, key); + if (!p) + ret = -ENOENT; + else if (kstrtoul(p, 0, &val)) + ret = -EINVAL; + else { + *valp = val; + ret = 0; + } + mutex_unlock(&codec->user_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(snd_hda_get_int_hint); +#endif /* CONFIG_SND_HDA_RECONFIG */ + +/* + * common sysfs attributes + */ +#ifdef CONFIG_SND_HDA_RECONFIG +#define RECONFIG_DEVICE_ATTR(name) DEVICE_ATTR_RW(name) +#else +#define RECONFIG_DEVICE_ATTR(name) DEVICE_ATTR_RO(name) +#endif +static RECONFIG_DEVICE_ATTR(vendor_id); +static RECONFIG_DEVICE_ATTR(subsystem_id); +static RECONFIG_DEVICE_ATTR(revision_id); +static DEVICE_ATTR_RO(afg); +static DEVICE_ATTR_RO(mfg); +static RECONFIG_DEVICE_ATTR(vendor_name); +static RECONFIG_DEVICE_ATTR(chip_name); +static RECONFIG_DEVICE_ATTR(modelname); +static DEVICE_ATTR_RO(init_pin_configs); +static DEVICE_ATTR_RO(driver_pin_configs); + + +#ifdef CONFIG_SND_HDA_PATCH_LOADER + +/* parser mode */ +enum { + LINE_MODE_NONE, + LINE_MODE_CODEC, + LINE_MODE_MODEL, + LINE_MODE_PINCFG, + LINE_MODE_VERB, + LINE_MODE_HINT, + LINE_MODE_VENDOR_ID, + LINE_MODE_SUBSYSTEM_ID, + LINE_MODE_REVISION_ID, + LINE_MODE_CHIP_NAME, + NUM_LINE_MODES, +}; + +static inline int strmatch(const char *a, const char *b) +{ + return strncasecmp(a, b, strlen(b)) == 0; +} + +/* parse the contents after the line "[codec]" + * accept only the line with three numbers, and assign the current codec + */ +static void parse_codec_mode(char *buf, struct hda_bus *bus, + struct hda_codec **codecp) +{ + int vendorid, subid, caddr; + struct hda_codec *codec; + + *codecp = NULL; + if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) { + list_for_each_codec(codec, bus) { + if ((vendorid <= 0 || codec->core.vendor_id == vendorid) && + (subid <= 0 || codec->core.subsystem_id == subid) && + codec->core.addr == caddr) { + *codecp = codec; + 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 const 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 const 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 + struct hda_hint *hint; + int i; + + /* clear init verbs */ + snd_array_free(&codec->init_verbs); + /* clear hints */ + snd_array_for_each(&codec->hints, i, hint) { + kfree(hint->key); /* we don't need to free hint->val */ + } + snd_array_free(&codec->hints); + snd_array_free(&codec->user_pins); +#endif +} |