--- /dev/null
+/*
+ * HD-audio codec core device
+ */
+
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/pm_runtime.h>
+#include <sound/hdaudio.h>
+#include <sound/hda_regmap.h>
+#include "local.h"
+
+static void setup_fg_nodes(struct hdac_device *codec);
+static int get_codec_vendor_name(struct hdac_device *codec);
+
+static void default_release(struct device *dev)
+{
+ snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
+}
+
+/**
+ * snd_hdac_device_init - initialize the HD-audio codec base device
+ * @codec: device to initialize
+ * @bus: but to attach
+ * @name: device name string
+ * @addr: codec address
+ *
+ * Returns zero for success or a negative error code.
+ *
+ * This function increments the runtime PM counter and marks it active.
+ * The caller needs to turn it off appropriately later.
+ *
+ * The caller needs to set the device's release op properly by itself.
+ */
+int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
+ const char *name, unsigned int addr)
+{
+ struct device *dev;
+ hda_nid_t fg;
+ int err;
+
+ dev = &codec->dev;
+ device_initialize(dev);
+ dev->parent = bus->dev;
+ dev->bus = &snd_hda_bus_type;
+ dev->release = default_release;
+ dev->groups = hdac_dev_attr_groups;
+ dev_set_name(dev, "%s", name);
+ device_enable_async_suspend(dev);
+
+ codec->bus = bus;
+ codec->addr = addr;
+ codec->type = HDA_DEV_CORE;
+ pm_runtime_set_active(&codec->dev);
+ pm_runtime_get_noresume(&codec->dev);
+ atomic_set(&codec->in_pm, 0);
+
+ err = snd_hdac_bus_add_device(bus, codec);
+ if (err < 0)
+ goto error;
+
+ /* fill parameters */
+ codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+ AC_PAR_VENDOR_ID);
+ if (codec->vendor_id == -1) {
+ /* read again, hopefully the access method was corrected
+ * in the last read...
+ */
+ codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+ AC_PAR_VENDOR_ID);
+ }
+
+ codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+ AC_PAR_SUBSYSTEM_ID);
+ codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+ AC_PAR_REV_ID);
+
+ setup_fg_nodes(codec);
+ if (!codec->afg && !codec->mfg) {
+ dev_err(dev, "no AFG or MFG node found\n");
+ err = -ENODEV;
+ goto error;
+ }
+
+ fg = codec->afg ? codec->afg : codec->mfg;
+
+ err = snd_hdac_refresh_widgets(codec);
+ if (err < 0)
+ goto error;
+
+ codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
+ /* reread ssid if not set by parameter */
+ if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
+ snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
+ &codec->subsystem_id);
+
+ err = get_codec_vendor_name(codec);
+ if (err < 0)
+ goto error;
+
+ codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
+ codec->vendor_id & 0xffff);
+ if (!codec->chip_name) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ return 0;
+
+ error:
+ put_device(&codec->dev);
+ return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_init);
+
+/**
+ * snd_hdac_device_exit - clean up the HD-audio codec base device
+ * @codec: device to clean up
+ */
+void snd_hdac_device_exit(struct hdac_device *codec)
+{
+ pm_runtime_put_noidle(&codec->dev);
+ snd_hdac_bus_remove_device(codec->bus, codec);
+ kfree(codec->vendor_name);
+ kfree(codec->chip_name);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
+
+/**
+ * snd_hdac_device_register - register the hd-audio codec base device
+ * codec: the device to register
+ */
+int snd_hdac_device_register(struct hdac_device *codec)
+{
+ int err;
+
+ err = device_add(&codec->dev);
+ if (err < 0)
+ return err;
+ err = hda_widget_sysfs_init(codec);
+ if (err < 0) {
+ device_del(&codec->dev);
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_register);
+
+/**
+ * snd_hdac_device_unregister - unregister the hd-audio codec base device
+ * codec: the device to unregister
+ */
+void snd_hdac_device_unregister(struct hdac_device *codec)
+{
+ if (device_is_registered(&codec->dev)) {
+ hda_widget_sysfs_exit(codec);
+ device_del(&codec->dev);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
+
+/**
+ * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
+ * HD-audio controller
+ * @codec: the codec object
+ * @nid: NID to encode
+ * @verb: verb to encode
+ * @parm: parameter to encode
+ *
+ * Return an encoded command verb or -1 for error.
+ */
+unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
+ unsigned int verb, unsigned int parm)
+{
+ u32 val, addr;
+
+ addr = codec->addr;
+ if ((addr & ~0xf) || (nid & ~0x7f) ||
+ (verb & ~0xfff) || (parm & ~0xffff)) {
+ dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
+ addr, nid, verb, parm);
+ return -1;
+ }
+
+ val = addr << 28;
+ val |= (u32)nid << 20;
+ val |= verb << 8;
+ val |= parm;
+ return val;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
+
+/**
+ * snd_hdac_exec_verb - execute an encoded verb
+ * @codec: the codec object
+ * @cmd: encoded verb to execute
+ * @flags: optional flags, pass zero for default
+ * @res: the pointer to store the result, NULL if running async
+ *
+ * Returns zero if successful, or a negative error code.
+ *
+ * This calls the exec_verb op when set in hdac_codec. If not,
+ * call the default snd_hdac_bus_exec_verb().
+ */
+int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
+ unsigned int flags, unsigned int *res)
+{
+ if (codec->exec_verb)
+ return codec->exec_verb(codec, cmd, flags, res);
+ return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
+
+
+/**
+ * snd_hdac_read - execute a verb
+ * @codec: the codec object
+ * @nid: NID to execute a verb
+ * @verb: verb to execute
+ * @parm: parameter for a verb
+ * @res: the pointer to store the result, NULL if running async
+ *
+ * Returns zero if successful, or a negative error code.
+ */
+int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
+ unsigned int verb, unsigned int parm, unsigned int *res)
+{
+ unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
+
+ return snd_hdac_exec_verb(codec, cmd, 0, res);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_read);
+
+/**
+ * _snd_hdac_read_parm - read a parmeter
+ *
+ * This function returns zero or an error unlike snd_hdac_read_parm().
+ */
+int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
+ unsigned int *res)
+{
+ unsigned int cmd;
+
+ cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
+ return snd_hdac_regmap_read_raw(codec, cmd, res);
+}
+EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
+
+/**
+ * snd_hdac_read_parm_uncached - read a codec parameter without caching
+ * @codec: the codec object
+ * @nid: NID to read a parameter
+ * @parm: parameter to read
+ *
+ * Returns -1 for error. If you need to distinguish the error more
+ * strictly, use snd_hdac_read() directly.
+ */
+int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
+ int parm)
+{
+ int val;
+
+ if (codec->regmap)
+ regcache_cache_bypass(codec->regmap, true);
+ val = snd_hdac_read_parm(codec, nid, parm);
+ if (codec->regmap)
+ regcache_cache_bypass(codec->regmap, false);
+ return val;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
+
+/**
+ * snd_hdac_override_parm - override read-only parameters
+ * @codec: the codec object
+ * @nid: NID for the parameter
+ * @parm: the parameter to change
+ * @val: the parameter value to overwrite
+ */
+int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
+ unsigned int parm, unsigned int val)
+{
+ unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
+ int err;
+
+ if (!codec->regmap)
+ return -EINVAL;
+
+ codec->caps_overwriting = true;
+ err = snd_hdac_regmap_write_raw(codec, verb, val);
+ codec->caps_overwriting = false;
+ return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
+
+/**
+ * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
+ * @codec: the codec object
+ * @nid: NID to inspect
+ * @start_id: the pointer to store the starting NID
+ *
+ * Returns the number of subtree nodes or zero if not found.
+ * This function reads parameters always without caching.
+ */
+int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
+ hda_nid_t *start_id)
+{
+ unsigned int parm;
+
+ parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
+ if (parm == -1) {
+ *start_id = 0;
+ return 0;
+ }
+ *start_id = (parm >> 16) & 0x7fff;
+ return (int)(parm & 0x7fff);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
+
+/*
+ * look for an AFG and MFG nodes
+ */
+static void setup_fg_nodes(struct hdac_device *codec)
+{
+ int i, total_nodes, function_id;
+ hda_nid_t nid;
+
+ total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
+ for (i = 0; i < total_nodes; i++, nid++) {
+ function_id = snd_hdac_read_parm(codec, nid,
+ AC_PAR_FUNCTION_TYPE);
+ switch (function_id & 0xff) {
+ case AC_GRP_AUDIO_FUNCTION:
+ codec->afg = nid;
+ codec->afg_function_id = function_id & 0xff;
+ codec->afg_unsol = (function_id >> 8) & 1;
+ break;
+ case AC_GRP_MODEM_FUNCTION:
+ codec->mfg = nid;
+ codec->mfg_function_id = function_id & 0xff;
+ codec->mfg_unsol = (function_id >> 8) & 1;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/**
+ * snd_hdac_refresh_widgets - Reset the widget start/end nodes
+ * @codec: the codec object
+ */
+int snd_hdac_refresh_widgets(struct hdac_device *codec)
+{
+ hda_nid_t start_nid;
+ int nums;
+
+ nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
+ if (!start_nid || nums <= 0 || nums >= 0xff) {
+ dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
+ codec->afg);
+ return -EINVAL;
+ }
+
+ codec->num_nodes = nums;
+ codec->start_nid = start_nid;
+ codec->end_nid = start_nid + nums;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
+
+/* return CONNLIST_LEN parameter of the given widget */
+static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
+{
+ unsigned int wcaps = get_wcaps(codec, nid);
+ unsigned int parm;
+
+ if (!(wcaps & AC_WCAP_CONN_LIST) &&
+ get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
+ return 0;
+
+ parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
+ if (parm == -1)
+ parm = 0;
+ return parm;
+}
+
+/**
+ * snd_hdac_get_connections - get a widget connection list
+ * @codec: the codec object
+ * @nid: NID
+ * @conn_list: the array to store the results, can be NULL
+ * @max_conns: the max size of the given array
+ *
+ * Returns the number of connected widgets, zero for no connection, or a
+ * negative error code. When the number of elements don't fit with the
+ * given array size, it returns -ENOSPC.
+ *
+ * When @conn_list is NULL, it just checks the number of connections.
+ */
+int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
+ hda_nid_t *conn_list, int max_conns)
+{
+ unsigned int parm;
+ int i, conn_len, conns, err;
+ unsigned int shift, num_elems, mask;
+ hda_nid_t prev_nid;
+ int null_count = 0;
+
+ parm = get_num_conns(codec, nid);
+ if (!parm)
+ return 0;
+
+ if (parm & AC_CLIST_LONG) {
+ /* long form */
+ shift = 16;
+ num_elems = 2;
+ } else {
+ /* short form */
+ shift = 8;
+ num_elems = 4;
+ }
+ conn_len = parm & AC_CLIST_LENGTH;
+ mask = (1 << (shift-1)) - 1;
+
+ if (!conn_len)
+ return 0; /* no connection */
+
+ if (conn_len == 1) {
+ /* single connection */
+ err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
+ &parm);
+ if (err < 0)
+ return err;
+ if (conn_list)
+ conn_list[0] = parm & mask;
+ return 1;
+ }
+
+ /* multi connection */
+ conns = 0;
+ prev_nid = 0;
+ for (i = 0; i < conn_len; i++) {
+ int range_val;
+ hda_nid_t val, n;
+
+ if (i % num_elems == 0) {
+ err = snd_hdac_read(codec, nid,
+ AC_VERB_GET_CONNECT_LIST, i,
+ &parm);
+ if (err < 0)
+ return -EIO;
+ }
+ range_val = !!(parm & (1 << (shift-1))); /* ranges */
+ val = parm & mask;
+ if (val == 0 && null_count++) { /* no second chance */
+ dev_dbg(&codec->dev,
+ "invalid CONNECT_LIST verb %x[%i]:%x\n",
+ nid, i, parm);
+ return 0;
+ }
+ parm >>= shift;
+ if (range_val) {
+ /* ranges between the previous and this one */
+ if (!prev_nid || prev_nid >= val) {
+ dev_warn(&codec->dev,
+ "invalid dep_range_val %x:%x\n",
+ prev_nid, val);
+ continue;
+ }
+ for (n = prev_nid + 1; n <= val; n++) {
+ if (conn_list) {
+ if (conns >= max_conns)
+ return -ENOSPC;
+ conn_list[conns] = n;
+ }
+ conns++;
+ }
+ } else {
+ if (conn_list) {
+ if (conns >= max_conns)
+ return -ENOSPC;
+ conn_list[conns] = val;
+ }
+ conns++;
+ }
+ prev_nid = val;
+ }
+ return conns;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
+
+#ifdef CONFIG_PM
+/**
+ * snd_hdac_power_up - power up the codec
+ * @codec: the codec object
+ *
+ * This function calls the runtime PM helper to power up the given codec.
+ * Unlike snd_hdac_power_up_pm(), you should call this only for the code
+ * path that isn't included in PM path. Otherwise it gets stuck.
+ */
+void snd_hdac_power_up(struct hdac_device *codec)
+{
+ pm_runtime_get_sync(&codec->dev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_up);
+
+/**
+ * snd_hdac_power_down - power down the codec
+ * @codec: the codec object
+ */
+void snd_hdac_power_down(struct hdac_device *codec)
+{
+ struct device *dev = &codec->dev;
+
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_down);
+
+/**
+ * snd_hdac_power_up_pm - power up the codec
+ * @codec: the codec object
+ *
+ * This function can be called in a recursive code path like init code
+ * which may be called by PM suspend/resume again. OTOH, if a power-up
+ * call must wake up the sleeper (e.g. in a kctl callback), use
+ * snd_hdac_power_up() instead.
+ */
+void snd_hdac_power_up_pm(struct hdac_device *codec)
+{
+ if (!atomic_inc_not_zero(&codec->in_pm))
+ snd_hdac_power_up(codec);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
+
+/**
+ * snd_hdac_power_down_pm - power down the codec
+ * @codec: the codec object
+ *
+ * Like snd_hdac_power_up_pm(), this function is used in a recursive
+ * code path like init code which may be called by PM suspend/resume again.
+ */
+void snd_hdac_power_down_pm(struct hdac_device *codec)
+{
+ if (atomic_dec_if_positive(&codec->in_pm) < 0)
+ snd_hdac_power_down(codec);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
+#endif
+
+/* codec vendor labels */
+struct hda_vendor_id {
+ unsigned int id;
+ const char *name;
+};
+
+static struct hda_vendor_id hda_vendor_ids[] = {
+ { 0x1002, "ATI" },
+ { 0x1013, "Cirrus Logic" },
+ { 0x1057, "Motorola" },
+ { 0x1095, "Silicon Image" },
+ { 0x10de, "Nvidia" },
+ { 0x10ec, "Realtek" },
+ { 0x1102, "Creative" },
+ { 0x1106, "VIA" },
+ { 0x111d, "IDT" },
+ { 0x11c1, "LSI" },
+ { 0x11d4, "Analog Devices" },
+ { 0x13f6, "C-Media" },
+ { 0x14f1, "Conexant" },
+ { 0x17e8, "Chrontel" },
+ { 0x1854, "LG" },
+ { 0x1aec, "Wolfson Microelectronics" },
+ { 0x1af4, "QEMU" },
+ { 0x434d, "C-Media" },
+ { 0x8086, "Intel" },
+ { 0x8384, "SigmaTel" },
+ {} /* terminator */
+};
+
+/* store the codec vendor name */
+static int get_codec_vendor_name(struct hdac_device *codec)
+{
+ const struct hda_vendor_id *c;
+ u16 vendor_id = codec->vendor_id >> 16;
+
+ for (c = hda_vendor_ids; c->id; c++) {
+ if (c->id == vendor_id) {
+ codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
+ return codec->vendor_name ? 0 : -ENOMEM;
+ }
+ }
+
+ codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
+ return codec->vendor_name ? 0 : -ENOMEM;
+}
Code Review / kvmfornfv.git / blobdiff