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 <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

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 <yunhong.jiang@intel.com>

1 files changed, 599 insertions, 0 deletions

diff --git a/kernel/sound/hda/hdac_device.c b/kernel/sound/hda/hdac_device.c
new file mode 100644
index 000000000..f75bf5622
--- /dev/null
+++ b/kernel/sound/hda/hdac_device.c
@@ -0,0 +1,599 @@
+/*
+ * 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;
+}