From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/sound/hda/hdac_sysfs.c | 406 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 406 insertions(+) create mode 100644 kernel/sound/hda/hdac_sysfs.c (limited to 'kernel/sound/hda/hdac_sysfs.c') diff --git a/kernel/sound/hda/hdac_sysfs.c b/kernel/sound/hda/hdac_sysfs.c new file mode 100644 index 000000000..0a6ce3b84 --- /dev/null +++ b/kernel/sound/hda/hdac_sysfs.c @@ -0,0 +1,406 @@ +/* + * sysfs support for HD-audio core device + */ + +#include +#include +#include +#include +#include +#include "local.h" + +struct hdac_widget_tree { + struct kobject *root; + struct kobject *afg; + struct kobject **nodes; +}; + +#define CODEC_ATTR(type) \ +static ssize_t type##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct hdac_device *codec = dev_to_hdac_dev(dev); \ + return sprintf(buf, "0x%x\n", codec->type); \ +} \ +static DEVICE_ATTR_RO(type) + +#define CODEC_ATTR_STR(type) \ +static ssize_t type##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct hdac_device *codec = dev_to_hdac_dev(dev); \ + return sprintf(buf, "%s\n", \ + codec->type ? codec->type : ""); \ +} \ +static DEVICE_ATTR_RO(type) + +CODEC_ATTR(type); +CODEC_ATTR(vendor_id); +CODEC_ATTR(subsystem_id); +CODEC_ATTR(revision_id); +CODEC_ATTR(afg); +CODEC_ATTR(mfg); +CODEC_ATTR_STR(vendor_name); +CODEC_ATTR_STR(chip_name); + +static struct attribute *hdac_dev_attrs[] = { + &dev_attr_type.attr, + &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, + NULL +}; + +static struct attribute_group hdac_dev_attr_group = { + .attrs = hdac_dev_attrs, +}; + +const struct attribute_group *hdac_dev_attr_groups[] = { + &hdac_dev_attr_group, + NULL +}; + +/* + * Widget tree sysfs + * + * This is a tree showing the attributes of each widget. It appears like + * /sys/bus/hdaudioC0D0/widgets/04/caps + */ + +struct widget_attribute; + +struct widget_attribute { + struct attribute attr; + ssize_t (*show)(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf); + ssize_t (*store)(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, + const char *buf, size_t count); +}; + +static int get_codec_nid(struct kobject *kobj, struct hdac_device **codecp) +{ + struct device *dev = kobj_to_dev(kobj->parent->parent); + int nid; + ssize_t ret; + + ret = kstrtoint(kobj->name, 16, &nid); + if (ret < 0) + return ret; + *codecp = dev_to_hdac_dev(dev); + return nid; +} + +static ssize_t widget_attr_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + struct widget_attribute *wid_attr = + container_of(attr, struct widget_attribute, attr); + struct hdac_device *codec; + int nid; + + if (!wid_attr->show) + return -EIO; + nid = get_codec_nid(kobj, &codec); + if (nid < 0) + return nid; + return wid_attr->show(codec, nid, wid_attr, buf); +} + +static ssize_t widget_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + struct widget_attribute *wid_attr = + container_of(attr, struct widget_attribute, attr); + struct hdac_device *codec; + int nid; + + if (!wid_attr->store) + return -EIO; + nid = get_codec_nid(kobj, &codec); + if (nid < 0) + return nid; + return wid_attr->store(codec, nid, wid_attr, buf, count); +} + +static const struct sysfs_ops widget_sysfs_ops = { + .show = widget_attr_show, + .store = widget_attr_store, +}; + +static void widget_release(struct kobject *kobj) +{ + kfree(kobj); +} + +static struct kobj_type widget_ktype = { + .release = widget_release, + .sysfs_ops = &widget_sysfs_ops, +}; + +#define WIDGET_ATTR_RO(_name) \ + struct widget_attribute wid_attr_##_name = __ATTR_RO(_name) +#define WIDGET_ATTR_RW(_name) \ + struct widget_attribute wid_attr_##_name = __ATTR_RW(_name) + +static ssize_t caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + return sprintf(buf, "0x%08x\n", get_wcaps(codec, nid)); +} + +static ssize_t pin_caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN) + return 0; + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP)); +} + +static ssize_t pin_cfg_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + unsigned int val; + + if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN) + return 0; + if (snd_hdac_read(codec, nid, AC_VERB_GET_CONFIG_DEFAULT, 0, &val)) + return 0; + return sprintf(buf, "0x%08x\n", val); +} + +static bool has_pcm_cap(struct hdac_device *codec, hda_nid_t nid) +{ + if (nid == codec->afg || nid == codec->mfg) + return true; + switch (get_wcaps_type(get_wcaps(codec, nid))) { + case AC_WID_AUD_OUT: + case AC_WID_AUD_IN: + return true; + default: + return false; + } +} + +static ssize_t pcm_caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + if (!has_pcm_cap(codec, nid)) + return 0; + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_PCM)); +} + +static ssize_t pcm_formats_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + if (!has_pcm_cap(codec, nid)) + return 0; + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_STREAM)); +} + +static ssize_t amp_in_caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_IN_AMP)) + return 0; + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP)); +} + +static ssize_t amp_out_caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_OUT_AMP)) + return 0; + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP)); +} + +static ssize_t power_caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_POWER)) + return 0; + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_POWER_STATE)); +} + +static ssize_t gpio_caps_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + return sprintf(buf, "0x%08x\n", + snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP)); +} + +static ssize_t connections_show(struct hdac_device *codec, hda_nid_t nid, + struct widget_attribute *attr, char *buf) +{ + hda_nid_t list[32]; + int i, nconns; + ssize_t ret = 0; + + nconns = snd_hdac_get_connections(codec, nid, list, ARRAY_SIZE(list)); + if (nconns <= 0) + return nconns; + for (i = 0; i < nconns; i++) + ret += sprintf(buf + ret, "%s0x%02x", i ? " " : "", list[i]); + ret += sprintf(buf + ret, "\n"); + return ret; +} + +static WIDGET_ATTR_RO(caps); +static WIDGET_ATTR_RO(pin_caps); +static WIDGET_ATTR_RO(pin_cfg); +static WIDGET_ATTR_RO(pcm_caps); +static WIDGET_ATTR_RO(pcm_formats); +static WIDGET_ATTR_RO(amp_in_caps); +static WIDGET_ATTR_RO(amp_out_caps); +static WIDGET_ATTR_RO(power_caps); +static WIDGET_ATTR_RO(gpio_caps); +static WIDGET_ATTR_RO(connections); + +static struct attribute *widget_node_attrs[] = { + &wid_attr_caps.attr, + &wid_attr_pin_caps.attr, + &wid_attr_pin_cfg.attr, + &wid_attr_pcm_caps.attr, + &wid_attr_pcm_formats.attr, + &wid_attr_amp_in_caps.attr, + &wid_attr_amp_out_caps.attr, + &wid_attr_power_caps.attr, + &wid_attr_connections.attr, + NULL, +}; + +static struct attribute *widget_afg_attrs[] = { + &wid_attr_pcm_caps.attr, + &wid_attr_pcm_formats.attr, + &wid_attr_amp_in_caps.attr, + &wid_attr_amp_out_caps.attr, + &wid_attr_power_caps.attr, + &wid_attr_gpio_caps.attr, + NULL, +}; + +static const struct attribute_group widget_node_group = { + .attrs = widget_node_attrs, +}; + +static const struct attribute_group widget_afg_group = { + .attrs = widget_afg_attrs, +}; + +static void free_widget_node(struct kobject *kobj, + const struct attribute_group *group) +{ + if (kobj) { + sysfs_remove_group(kobj, group); + kobject_put(kobj); + } +} + +static void widget_tree_free(struct hdac_device *codec) +{ + struct hdac_widget_tree *tree = codec->widgets; + struct kobject **p; + + if (!tree) + return; + free_widget_node(tree->afg, &widget_afg_group); + if (tree->nodes) { + for (p = tree->nodes; *p; p++) + free_widget_node(*p, &widget_node_group); + kfree(tree->nodes); + } + if (tree->root) + kobject_put(tree->root); + kfree(tree); + codec->widgets = NULL; +} + +static int add_widget_node(struct kobject *parent, hda_nid_t nid, + const struct attribute_group *group, + struct kobject **res) +{ + struct kobject *kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); + int err; + + if (!kobj) + return -ENOMEM; + kobject_init(kobj, &widget_ktype); + err = kobject_add(kobj, parent, "%02x", nid); + if (err < 0) + return err; + err = sysfs_create_group(kobj, group); + if (err < 0) { + kobject_put(kobj); + return err; + } + + *res = kobj; + return 0; +} + +static int widget_tree_create(struct hdac_device *codec) +{ + struct hdac_widget_tree *tree; + int i, err; + hda_nid_t nid; + + tree = codec->widgets = kzalloc(sizeof(*tree), GFP_KERNEL); + if (!tree) + return -ENOMEM; + + tree->root = kobject_create_and_add("widgets", &codec->dev.kobj); + if (!tree->root) + return -ENOMEM; + + tree->nodes = kcalloc(codec->num_nodes + 1, sizeof(*tree->nodes), + GFP_KERNEL); + if (!tree->nodes) + return -ENOMEM; + + for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) { + err = add_widget_node(tree->root, nid, &widget_node_group, + &tree->nodes[i]); + if (err < 0) + return err; + } + + if (codec->afg) { + err = add_widget_node(tree->root, codec->afg, + &widget_afg_group, &tree->afg); + if (err < 0) + return err; + } + + kobject_uevent(tree->root, KOBJ_CHANGE); + return 0; +} + +int hda_widget_sysfs_init(struct hdac_device *codec) +{ + int err; + + err = widget_tree_create(codec); + if (err < 0) { + widget_tree_free(codec); + return err; + } + + return 0; +} + +void hda_widget_sysfs_exit(struct hdac_device *codec) +{ + widget_tree_free(codec); +} -- cgit 1.2.3-korg