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-rw-r--r--sound/hda/ext/Makefile4
-rw-r--r--sound/hda/ext/hdac_ext_bus.c142
-rw-r--r--sound/hda/ext/hdac_ext_controller.c375
-rw-r--r--sound/hda/ext/hdac_ext_stream.c532
4 files changed, 1053 insertions, 0 deletions
diff --git a/sound/hda/ext/Makefile b/sound/hda/ext/Makefile
new file mode 100644
index 000000000..154779bdc
--- /dev/null
+++ b/sound/hda/ext/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+snd-hda-ext-core-objs := hdac_ext_bus.o hdac_ext_controller.o hdac_ext_stream.o
+
+obj-$(CONFIG_SND_HDA_EXT_CORE) += snd-hda-ext-core.o
diff --git a/sound/hda/ext/hdac_ext_bus.c b/sound/hda/ext/hdac_ext_bus.c
new file mode 100644
index 000000000..6004ea1c3
--- /dev/null
+++ b/sound/hda/ext/hdac_ext_bus.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * hdac-ext-bus.c - HD-audio extended core bus functions.
+ *
+ * Copyright (C) 2014-2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <sound/hdaudio_ext.h>
+
+MODULE_DESCRIPTION("HDA extended core");
+MODULE_LICENSE("GPL v2");
+
+/**
+ * snd_hdac_ext_bus_init - initialize a HD-audio extended bus
+ * @bus: the pointer to HDAC bus object
+ * @dev: device pointer
+ * @ops: bus verb operators
+ * @ext_ops: operators used for ASoC HDA codec drivers
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev,
+ const struct hdac_bus_ops *ops,
+ const struct hdac_ext_bus_ops *ext_ops)
+{
+ int ret;
+
+ ret = snd_hdac_bus_init(bus, dev, ops);
+ if (ret < 0)
+ return ret;
+
+ bus->ext_ops = ext_ops;
+ /* FIXME:
+ * Currently only one bus is supported, if there is device with more
+ * buses, bus->idx should be greater than 0, but there needs to be a
+ * reliable way to always assign same number.
+ */
+ bus->idx = 0;
+ bus->cmd_dma_state = true;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
+
+/**
+ * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
+ * @bus: the pointer to HDAC bus object
+ */
+void snd_hdac_ext_bus_exit(struct hdac_bus *bus)
+{
+ snd_hdac_bus_exit(bus);
+ WARN_ON(!list_empty(&bus->hlink_list));
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
+
+/**
+ * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
+ *
+ * @bus: the pointer to HDAC bus object
+ */
+void snd_hdac_ext_bus_device_remove(struct hdac_bus *bus)
+{
+ struct hdac_device *codec, *__codec;
+ /*
+ * we need to remove all the codec devices objects created in the
+ * snd_hdac_ext_bus_device_init
+ */
+ list_for_each_entry_safe(codec, __codec, &bus->codec_list, list) {
+ snd_hdac_device_unregister(codec);
+ put_device(&codec->dev);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
+#define dev_to_hdac(dev) (container_of((dev), \
+ struct hdac_device, dev))
+
+static inline struct hdac_driver *get_hdrv(struct device *dev)
+{
+ struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
+ return hdrv;
+}
+
+static inline struct hdac_device *get_hdev(struct device *dev)
+{
+ struct hdac_device *hdev = dev_to_hdac_dev(dev);
+ return hdev;
+}
+
+static int hda_ext_drv_probe(struct device *dev)
+{
+ return (get_hdrv(dev))->probe(get_hdev(dev));
+}
+
+static int hdac_ext_drv_remove(struct device *dev)
+{
+ return (get_hdrv(dev))->remove(get_hdev(dev));
+}
+
+static void hdac_ext_drv_shutdown(struct device *dev)
+{
+ return (get_hdrv(dev))->shutdown(get_hdev(dev));
+}
+
+/**
+ * snd_hda_ext_driver_register - register a driver for ext hda devices
+ *
+ * @drv: ext hda driver structure
+ */
+int snd_hda_ext_driver_register(struct hdac_driver *drv)
+{
+ drv->type = HDA_DEV_ASOC;
+ drv->driver.bus = &snd_hda_bus_type;
+ /* we use default match */
+
+ if (drv->probe)
+ drv->driver.probe = hda_ext_drv_probe;
+ if (drv->remove)
+ drv->driver.remove = hdac_ext_drv_remove;
+ if (drv->shutdown)
+ drv->driver.shutdown = hdac_ext_drv_shutdown;
+
+ return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);
+
+/**
+ * snd_hda_ext_driver_unregister - unregister a driver for ext hda devices
+ *
+ * @drv: ext hda driver structure
+ */
+void snd_hda_ext_driver_unregister(struct hdac_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
new file mode 100644
index 000000000..80876b9a8
--- /dev/null
+++ b/sound/hda/ext/hdac_ext_controller.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * hdac-ext-controller.c - HD-audio extended controller functions.
+ *
+ * Copyright (C) 2014-2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <sound/hda_register.h>
+#include <sound/hdaudio_ext.h>
+
+/*
+ * processing pipe helpers - these helpers are useful for dealing with HDA
+ * new capability of processing pipelines
+ */
+
+/**
+ * snd_hdac_ext_bus_ppcap_enable - enable/disable processing pipe capability
+ * @bus: the pointer to HDAC bus object
+ * @enable: flag to turn on/off the capability
+ */
+void snd_hdac_ext_bus_ppcap_enable(struct hdac_bus *bus, bool enable)
+{
+
+ if (!bus->ppcap) {
+ dev_err(bus->dev, "Address of PP capability is NULL");
+ return;
+ }
+
+ if (enable)
+ snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
+ AZX_PPCTL_GPROCEN, AZX_PPCTL_GPROCEN);
+ else
+ snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
+ AZX_PPCTL_GPROCEN, 0);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable);
+
+/**
+ * snd_hdac_ext_bus_ppcap_int_enable - ppcap interrupt enable/disable
+ * @bus: the pointer to HDAC bus object
+ * @enable: flag to enable/disable interrupt
+ */
+void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_bus *bus, bool enable)
+{
+
+ if (!bus->ppcap) {
+ dev_err(bus->dev, "Address of PP capability is NULL\n");
+ return;
+ }
+
+ if (enable)
+ snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
+ AZX_PPCTL_PIE, AZX_PPCTL_PIE);
+ else
+ snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
+ AZX_PPCTL_PIE, 0);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable);
+
+/*
+ * Multilink helpers - these helpers are useful for dealing with HDA
+ * new multilink capability
+ */
+
+/**
+ * snd_hdac_ext_bus_get_ml_capabilities - get multilink capability
+ * @bus: the pointer to HDAC bus object
+ *
+ * This will parse all links and read the mlink capabilities and add them
+ * in hlink_list of extended hdac bus
+ * Note: this will be freed on bus exit by driver
+ */
+int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_bus *bus)
+{
+ int idx;
+ u32 link_count;
+ struct hdac_ext_link *hlink;
+
+ link_count = readl(bus->mlcap + AZX_REG_ML_MLCD) + 1;
+
+ dev_dbg(bus->dev, "In %s Link count: %d\n", __func__, link_count);
+
+ for (idx = 0; idx < link_count; idx++) {
+ hlink = kzalloc(sizeof(*hlink), GFP_KERNEL);
+ if (!hlink)
+ return -ENOMEM;
+ hlink->index = idx;
+ hlink->bus = bus;
+ hlink->ml_addr = bus->mlcap + AZX_ML_BASE +
+ (AZX_ML_INTERVAL * idx);
+ hlink->lcaps = readl(hlink->ml_addr + AZX_REG_ML_LCAP);
+ hlink->lsdiid = readw(hlink->ml_addr + AZX_REG_ML_LSDIID);
+
+ /* since link in On, update the ref */
+ hlink->ref_count = 1;
+
+ list_add_tail(&hlink->list, &bus->hlink_list);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities);
+
+/**
+ * snd_hdac_link_free_all- free hdac extended link objects
+ *
+ * @bus: the pointer to HDAC bus object
+ */
+
+void snd_hdac_link_free_all(struct hdac_bus *bus)
+{
+ struct hdac_ext_link *l;
+
+ while (!list_empty(&bus->hlink_list)) {
+ l = list_first_entry(&bus->hlink_list, struct hdac_ext_link, list);
+ list_del(&l->list);
+ kfree(l);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_link_free_all);
+
+/**
+ * snd_hdac_ext_bus_link_at - get link at specified address
+ * @bus: link's parent bus device
+ * @addr: codec device address
+ *
+ * Returns link object or NULL if matching link is not found.
+ */
+struct hdac_ext_link *snd_hdac_ext_bus_link_at(struct hdac_bus *bus, int addr)
+{
+ struct hdac_ext_link *hlink;
+ int i;
+
+ list_for_each_entry(hlink, &bus->hlink_list, list)
+ for (i = 0; i < HDA_MAX_CODECS; i++)
+ if (hlink->lsdiid & (0x1 << addr))
+ return hlink;
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_at);
+
+/**
+ * snd_hdac_ext_bus_get_link - get link based on codec name
+ * @bus: the pointer to HDAC bus object
+ * @codec_name: codec name
+ */
+struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_bus *bus,
+ const char *codec_name)
+{
+ int bus_idx, addr;
+
+ if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2)
+ return NULL;
+ if (bus->idx != bus_idx)
+ return NULL;
+ if (addr < 0 || addr > 31)
+ return NULL;
+
+ return snd_hdac_ext_bus_link_at(bus, addr);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_link);
+
+static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable)
+{
+ int timeout;
+ u32 val;
+ int mask = (1 << AZX_ML_LCTL_CPA_SHIFT);
+
+ udelay(3);
+ timeout = 150;
+
+ do {
+ val = readl(link->ml_addr + AZX_REG_ML_LCTL);
+ if (enable) {
+ if (((val & mask) >> AZX_ML_LCTL_CPA_SHIFT))
+ return 0;
+ } else {
+ if (!((val & mask) >> AZX_ML_LCTL_CPA_SHIFT))
+ return 0;
+ }
+ udelay(3);
+ } while (--timeout);
+
+ return -EIO;
+}
+
+/**
+ * snd_hdac_ext_bus_link_power_up -power up hda link
+ * @link: HD-audio extended link
+ */
+int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link)
+{
+ snd_hdac_updatel(link->ml_addr, AZX_REG_ML_LCTL,
+ AZX_ML_LCTL_SPA, AZX_ML_LCTL_SPA);
+
+ return check_hdac_link_power_active(link, true);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up);
+
+/**
+ * snd_hdac_ext_bus_link_power_down -power down hda link
+ * @link: HD-audio extended link
+ */
+int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link)
+{
+ snd_hdac_updatel(link->ml_addr, AZX_REG_ML_LCTL, AZX_ML_LCTL_SPA, 0);
+
+ return check_hdac_link_power_active(link, false);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);
+
+/**
+ * snd_hdac_ext_bus_link_power_up_all -power up all hda link
+ * @bus: the pointer to HDAC bus object
+ */
+int snd_hdac_ext_bus_link_power_up_all(struct hdac_bus *bus)
+{
+ struct hdac_ext_link *hlink = NULL;
+ int ret;
+
+ list_for_each_entry(hlink, &bus->hlink_list, list) {
+ snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL,
+ AZX_ML_LCTL_SPA, AZX_ML_LCTL_SPA);
+ ret = check_hdac_link_power_active(hlink, true);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up_all);
+
+/**
+ * snd_hdac_ext_bus_link_power_down_all -power down all hda link
+ * @bus: the pointer to HDAC bus object
+ */
+int snd_hdac_ext_bus_link_power_down_all(struct hdac_bus *bus)
+{
+ struct hdac_ext_link *hlink = NULL;
+ int ret;
+
+ list_for_each_entry(hlink, &bus->hlink_list, list) {
+ snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL,
+ AZX_ML_LCTL_SPA, 0);
+ ret = check_hdac_link_power_active(hlink, false);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all);
+
+int snd_hdac_ext_bus_link_get(struct hdac_bus *bus,
+ struct hdac_ext_link *link)
+{
+ unsigned long codec_mask;
+ int ret = 0;
+
+ mutex_lock(&bus->lock);
+
+ /*
+ * if we move from 0 to 1, count will be 1 so power up this link
+ * as well, also check the dma status and trigger that
+ */
+ if (++link->ref_count == 1) {
+ if (!bus->cmd_dma_state) {
+ snd_hdac_bus_init_cmd_io(bus);
+ bus->cmd_dma_state = true;
+ }
+
+ ret = snd_hdac_ext_bus_link_power_up(link);
+
+ /*
+ * clear the register to invalidate all the output streams
+ */
+ snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV,
+ AZX_ML_LOSIDV_STREAM_MASK, 0);
+ /*
+ * wait for 521usec for codec to report status
+ * HDA spec section 4.3 - Codec Discovery
+ */
+ udelay(521);
+ codec_mask = snd_hdac_chip_readw(bus, STATESTS);
+ dev_dbg(bus->dev, "codec_mask = 0x%lx\n", codec_mask);
+ snd_hdac_chip_writew(bus, STATESTS, codec_mask);
+ if (!bus->codec_mask)
+ bus->codec_mask = codec_mask;
+ }
+
+ mutex_unlock(&bus->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_get);
+
+int snd_hdac_ext_bus_link_put(struct hdac_bus *bus,
+ struct hdac_ext_link *link)
+{
+ int ret = 0;
+ struct hdac_ext_link *hlink;
+ bool link_up = false;
+
+ mutex_lock(&bus->lock);
+
+ /*
+ * if we move from 1 to 0, count will be 0
+ * so power down this link as well
+ */
+ if (--link->ref_count == 0) {
+ ret = snd_hdac_ext_bus_link_power_down(link);
+
+ /*
+ * now check if all links are off, if so turn off
+ * cmd dma as well
+ */
+ list_for_each_entry(hlink, &bus->hlink_list, list) {
+ if (hlink->ref_count) {
+ link_up = true;
+ break;
+ }
+ }
+
+ if (!link_up) {
+ snd_hdac_bus_stop_cmd_io(bus);
+ bus->cmd_dma_state = false;
+ }
+ }
+
+ mutex_unlock(&bus->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_put);
+
+static void hdac_ext_codec_link_up(struct hdac_device *codec)
+{
+ const char *devname = dev_name(&codec->dev);
+ struct hdac_ext_link *hlink =
+ snd_hdac_ext_bus_get_link(codec->bus, devname);
+
+ if (hlink)
+ snd_hdac_ext_bus_link_get(codec->bus, hlink);
+}
+
+static void hdac_ext_codec_link_down(struct hdac_device *codec)
+{
+ const char *devname = dev_name(&codec->dev);
+ struct hdac_ext_link *hlink =
+ snd_hdac_ext_bus_get_link(codec->bus, devname);
+
+ if (hlink)
+ snd_hdac_ext_bus_link_put(codec->bus, hlink);
+}
+
+void snd_hdac_ext_bus_link_power(struct hdac_device *codec, bool enable)
+{
+ struct hdac_bus *bus = codec->bus;
+ bool oldstate = test_bit(codec->addr, &bus->codec_powered);
+
+ if (enable == oldstate)
+ return;
+
+ snd_hdac_bus_link_power(codec, enable);
+
+ if (enable)
+ hdac_ext_codec_link_up(codec);
+ else
+ hdac_ext_codec_link_down(codec);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power);
diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
new file mode 100644
index 000000000..70f3ad71a
--- /dev/null
+++ b/sound/hda/ext/hdac_ext_stream.c
@@ -0,0 +1,532 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * hdac-ext-stream.c - HD-audio extended stream operations.
+ *
+ * Copyright (C) 2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/hda_register.h>
+#include <sound/hdaudio_ext.h>
+
+/**
+ * snd_hdac_ext_stream_init - initialize each stream (aka device)
+ * @bus: HD-audio core bus
+ * @hext_stream: HD-audio ext core stream object to initialize
+ * @idx: stream index number
+ * @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
+ * @tag: the tag id to assign
+ *
+ * initialize the stream, if ppcap is enabled then init those and then
+ * invoke hdac stream initialization routine
+ */
+static void snd_hdac_ext_stream_init(struct hdac_bus *bus,
+ struct hdac_ext_stream *hext_stream,
+ int idx, int direction, int tag)
+{
+ if (bus->ppcap) {
+ hext_stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
+ AZX_PPHC_INTERVAL * idx;
+
+ hext_stream->pplc_addr = bus->ppcap + AZX_PPLC_BASE +
+ AZX_PPLC_MULTI * bus->num_streams +
+ AZX_PPLC_INTERVAL * idx;
+ }
+
+ if (bus->spbcap) {
+ hext_stream->spib_addr = bus->spbcap + AZX_SPB_BASE +
+ AZX_SPB_INTERVAL * idx +
+ AZX_SPB_SPIB;
+
+ hext_stream->fifo_addr = bus->spbcap + AZX_SPB_BASE +
+ AZX_SPB_INTERVAL * idx +
+ AZX_SPB_MAXFIFO;
+ }
+
+ if (bus->drsmcap)
+ hext_stream->dpibr_addr = bus->drsmcap + AZX_DRSM_BASE +
+ AZX_DRSM_INTERVAL * idx;
+
+ hext_stream->decoupled = false;
+ snd_hdac_stream_init(bus, &hext_stream->hstream, idx, direction, tag);
+}
+
+/**
+ * snd_hdac_ext_stream_init_all - create and initialize the stream objects
+ * for an extended hda bus
+ * @bus: HD-audio core bus
+ * @start_idx: start index for streams
+ * @num_stream: number of streams to initialize
+ * @dir: direction of streams
+ */
+int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
+ int num_stream, int dir)
+{
+ int stream_tag = 0;
+ int i, tag, idx = start_idx;
+
+ for (i = 0; i < num_stream; i++) {
+ struct hdac_ext_stream *hext_stream =
+ kzalloc(sizeof(*hext_stream), GFP_KERNEL);
+ if (!hext_stream)
+ return -ENOMEM;
+ tag = ++stream_tag;
+ snd_hdac_ext_stream_init(bus, hext_stream, idx, dir, tag);
+ idx++;
+ }
+
+ return 0;
+
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
+
+/**
+ * snd_hdac_ext_stream_free_all - free hdac extended stream objects
+ *
+ * @bus: HD-audio core bus
+ */
+void snd_hdac_ext_stream_free_all(struct hdac_bus *bus)
+{
+ struct hdac_stream *s, *_s;
+ struct hdac_ext_stream *hext_stream;
+
+ list_for_each_entry_safe(s, _s, &bus->stream_list, list) {
+ hext_stream = stream_to_hdac_ext_stream(s);
+ snd_hdac_ext_stream_decouple(bus, hext_stream, false);
+ list_del(&s->list);
+ kfree(hext_stream);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_free_all);
+
+void snd_hdac_ext_stream_decouple_locked(struct hdac_bus *bus,
+ struct hdac_ext_stream *hext_stream,
+ bool decouple)
+{
+ struct hdac_stream *hstream = &hext_stream->hstream;
+ u32 val;
+ int mask = AZX_PPCTL_PROCEN(hstream->index);
+
+ val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
+
+ if (decouple && !val)
+ snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, mask);
+ else if (!decouple && val)
+ snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
+
+ hext_stream->decoupled = decouple;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple_locked);
+
+/**
+ * snd_hdac_ext_stream_decouple - decouple the hdac stream
+ * @bus: HD-audio core bus
+ * @hext_stream: HD-audio ext core stream object to initialize
+ * @decouple: flag to decouple
+ */
+void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
+ struct hdac_ext_stream *hext_stream, bool decouple)
+{
+ spin_lock_irq(&bus->reg_lock);
+ snd_hdac_ext_stream_decouple_locked(bus, hext_stream, decouple);
+ spin_unlock_irq(&bus->reg_lock);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
+
+/**
+ * snd_hdac_ext_link_stream_start - start a stream
+ * @hext_stream: HD-audio ext core stream to start
+ */
+void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *hext_stream)
+{
+ snd_hdac_updatel(hext_stream->pplc_addr, AZX_REG_PPLCCTL,
+ AZX_PPLCCTL_RUN, AZX_PPLCCTL_RUN);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
+
+/**
+ * snd_hdac_ext_link_stream_clear - stop a stream DMA
+ * @hext_stream: HD-audio ext core stream to stop
+ */
+void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *hext_stream)
+{
+ snd_hdac_updatel(hext_stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
+
+/**
+ * snd_hdac_ext_link_stream_reset - reset a stream
+ * @hext_stream: HD-audio ext core stream to reset
+ */
+void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *hext_stream)
+{
+ unsigned char val;
+ int timeout;
+
+ snd_hdac_ext_link_stream_clear(hext_stream);
+
+ snd_hdac_updatel(hext_stream->pplc_addr, AZX_REG_PPLCCTL,
+ AZX_PPLCCTL_STRST, AZX_PPLCCTL_STRST);
+ udelay(3);
+ timeout = 50;
+ do {
+ val = readl(hext_stream->pplc_addr + AZX_REG_PPLCCTL) &
+ AZX_PPLCCTL_STRST;
+ if (val)
+ break;
+ udelay(3);
+ } while (--timeout);
+ val &= ~AZX_PPLCCTL_STRST;
+ writel(val, hext_stream->pplc_addr + AZX_REG_PPLCCTL);
+ udelay(3);
+
+ timeout = 50;
+ /* waiting for hardware to report that the stream is out of reset */
+ do {
+ val = readl(hext_stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
+ if (!val)
+ break;
+ udelay(3);
+ } while (--timeout);
+
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
+
+/**
+ * snd_hdac_ext_link_stream_setup - set up the SD for streaming
+ * @hext_stream: HD-audio ext core stream to set up
+ * @fmt: stream format
+ */
+int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *hext_stream, int fmt)
+{
+ struct hdac_stream *hstream = &hext_stream->hstream;
+ unsigned int val;
+
+ /* make sure the run bit is zero for SD */
+ snd_hdac_ext_link_stream_clear(hext_stream);
+ /* program the stream_tag */
+ val = readl(hext_stream->pplc_addr + AZX_REG_PPLCCTL);
+ val = (val & ~AZX_PPLCCTL_STRM_MASK) |
+ (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
+ writel(val, hext_stream->pplc_addr + AZX_REG_PPLCCTL);
+
+ /* program the stream format */
+ writew(fmt, hext_stream->pplc_addr + AZX_REG_PPLCFMT);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
+
+/**
+ * snd_hdac_ext_link_set_stream_id - maps stream id to link output
+ * @link: HD-audio ext link to set up
+ * @stream: stream id
+ */
+void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
+ int stream)
+{
+ snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
+
+/**
+ * snd_hdac_ext_link_clear_stream_id - maps stream id to link output
+ * @link: HD-audio ext link to set up
+ * @stream: stream id
+ */
+void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
+ int stream)
+{
+ snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
+
+static struct hdac_ext_stream *
+hdac_ext_link_stream_assign(struct hdac_bus *bus,
+ struct snd_pcm_substream *substream)
+{
+ struct hdac_ext_stream *res = NULL;
+ struct hdac_stream *hstream = NULL;
+
+ if (!bus->ppcap) {
+ dev_err(bus->dev, "stream type not supported\n");
+ return NULL;
+ }
+
+ spin_lock_irq(&bus->reg_lock);
+ list_for_each_entry(hstream, &bus->stream_list, list) {
+ struct hdac_ext_stream *hext_stream = container_of(hstream,
+ struct hdac_ext_stream,
+ hstream);
+ if (hstream->direction != substream->stream)
+ continue;
+
+ /* check if link stream is available */
+ if (!hext_stream->link_locked) {
+ res = hext_stream;
+ break;
+ }
+
+ }
+ if (res) {
+ snd_hdac_ext_stream_decouple_locked(bus, res, true);
+ res->link_locked = 1;
+ res->link_substream = substream;
+ }
+ spin_unlock_irq(&bus->reg_lock);
+ return res;
+}
+
+static struct hdac_ext_stream *
+hdac_ext_host_stream_assign(struct hdac_bus *bus,
+ struct snd_pcm_substream *substream)
+{
+ struct hdac_ext_stream *res = NULL;
+ struct hdac_stream *hstream = NULL;
+
+ if (!bus->ppcap) {
+ dev_err(bus->dev, "stream type not supported\n");
+ return NULL;
+ }
+
+ spin_lock_irq(&bus->reg_lock);
+ list_for_each_entry(hstream, &bus->stream_list, list) {
+ struct hdac_ext_stream *hext_stream = container_of(hstream,
+ struct hdac_ext_stream,
+ hstream);
+ if (hstream->direction != substream->stream)
+ continue;
+
+ if (!hstream->opened) {
+ res = hext_stream;
+ break;
+ }
+ }
+ if (res) {
+ snd_hdac_ext_stream_decouple_locked(bus, res, true);
+ res->hstream.opened = 1;
+ res->hstream.running = 0;
+ res->hstream.substream = substream;
+ }
+ spin_unlock_irq(&bus->reg_lock);
+
+ return res;
+}
+
+/**
+ * snd_hdac_ext_stream_assign - assign a stream for the PCM
+ * @bus: HD-audio core bus
+ * @substream: PCM substream to assign
+ * @type: type of stream (coupled, host or link stream)
+ *
+ * This assigns the stream based on the type (coupled/host/link), for the
+ * given PCM substream, assigns it and returns the stream object
+ *
+ * coupled: Looks for an unused stream
+ * host: Looks for an unused decoupled host stream
+ * link: Looks for an unused decoupled link stream
+ *
+ * If no stream is free, returns NULL. The function tries to keep using
+ * the same stream object when it's used beforehand. when a stream is
+ * decoupled, it becomes a host stream and link stream.
+ */
+struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
+ struct snd_pcm_substream *substream,
+ int type)
+{
+ struct hdac_ext_stream *hext_stream = NULL;
+ struct hdac_stream *hstream = NULL;
+
+ switch (type) {
+ case HDAC_EXT_STREAM_TYPE_COUPLED:
+ hstream = snd_hdac_stream_assign(bus, substream);
+ if (hstream)
+ hext_stream = container_of(hstream,
+ struct hdac_ext_stream,
+ hstream);
+ return hext_stream;
+
+ case HDAC_EXT_STREAM_TYPE_HOST:
+ return hdac_ext_host_stream_assign(bus, substream);
+
+ case HDAC_EXT_STREAM_TYPE_LINK:
+ return hdac_ext_link_stream_assign(bus, substream);
+
+ default:
+ return NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
+
+/**
+ * snd_hdac_ext_stream_release - release the assigned stream
+ * @hext_stream: HD-audio ext core stream to release
+ * @type: type of stream (coupled, host or link stream)
+ *
+ * Release the stream that has been assigned by snd_hdac_ext_stream_assign().
+ */
+void snd_hdac_ext_stream_release(struct hdac_ext_stream *hext_stream, int type)
+{
+ struct hdac_bus *bus = hext_stream->hstream.bus;
+
+ switch (type) {
+ case HDAC_EXT_STREAM_TYPE_COUPLED:
+ snd_hdac_stream_release(&hext_stream->hstream);
+ break;
+
+ case HDAC_EXT_STREAM_TYPE_HOST:
+ spin_lock_irq(&bus->reg_lock);
+ /* couple link only if not in use */
+ if (!hext_stream->link_locked)
+ snd_hdac_ext_stream_decouple_locked(bus, hext_stream, false);
+ snd_hdac_stream_release_locked(&hext_stream->hstream);
+ spin_unlock_irq(&bus->reg_lock);
+ break;
+
+ case HDAC_EXT_STREAM_TYPE_LINK:
+ spin_lock_irq(&bus->reg_lock);
+ /* couple host only if not in use */
+ if (!hext_stream->hstream.opened)
+ snd_hdac_ext_stream_decouple_locked(bus, hext_stream, false);
+ hext_stream->link_locked = 0;
+ hext_stream->link_substream = NULL;
+ spin_unlock_irq(&bus->reg_lock);
+ break;
+
+ default:
+ dev_dbg(bus->dev, "Invalid type %d\n", type);
+ }
+
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
+
+/**
+ * snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
+ * @bus: HD-audio core bus
+ * @enable: flag to enable/disable SPIB
+ * @index: stream index for which SPIB need to be enabled
+ */
+void snd_hdac_ext_stream_spbcap_enable(struct hdac_bus *bus,
+ bool enable, int index)
+{
+ u32 mask = 0;
+
+ if (!bus->spbcap) {
+ dev_err(bus->dev, "Address of SPB capability is NULL\n");
+ return;
+ }
+
+ mask |= (1 << index);
+
+ if (enable)
+ snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, mask);
+ else
+ snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
+
+/**
+ * snd_hdac_ext_stream_set_spib - sets the spib value of a stream
+ * @bus: HD-audio core bus
+ * @hext_stream: hdac_ext_stream
+ * @value: spib value to set
+ */
+int snd_hdac_ext_stream_set_spib(struct hdac_bus *bus,
+ struct hdac_ext_stream *hext_stream, u32 value)
+{
+
+ if (!bus->spbcap) {
+ dev_err(bus->dev, "Address of SPB capability is NULL\n");
+ return -EINVAL;
+ }
+
+ writel(value, hext_stream->spib_addr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
+
+/**
+ * snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream
+ * @bus: HD-audio core bus
+ * @hext_stream: hdac_ext_stream
+ *
+ * Return maxfifo for the stream
+ */
+int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_bus *bus,
+ struct hdac_ext_stream *hext_stream)
+{
+
+ if (!bus->spbcap) {
+ dev_err(bus->dev, "Address of SPB capability is NULL\n");
+ return -EINVAL;
+ }
+
+ return readl(hext_stream->fifo_addr);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
+
+/**
+ * snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream
+ * @bus: HD-audio core bus
+ * @enable: flag to enable/disable DRSM
+ * @index: stream index for which DRSM need to be enabled
+ */
+void snd_hdac_ext_stream_drsm_enable(struct hdac_bus *bus,
+ bool enable, int index)
+{
+ u32 mask = 0;
+
+ if (!bus->drsmcap) {
+ dev_err(bus->dev, "Address of DRSM capability is NULL\n");
+ return;
+ }
+
+ mask |= (1 << index);
+
+ if (enable)
+ snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, mask);
+ else
+ snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
+
+/**
+ * snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream
+ * @bus: HD-audio core bus
+ * @hext_stream: hdac_ext_stream
+ * @value: dpib value to set
+ */
+int snd_hdac_ext_stream_set_dpibr(struct hdac_bus *bus,
+ struct hdac_ext_stream *hext_stream, u32 value)
+{
+
+ if (!bus->drsmcap) {
+ dev_err(bus->dev, "Address of DRSM capability is NULL\n");
+ return -EINVAL;
+ }
+
+ writel(value, hext_stream->dpibr_addr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr);
+
+/**
+ * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
+ * @hext_stream: hdac_ext_stream
+ * @value: lpib value to set
+ */
+int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *hext_stream, u32 value)
+{
+ snd_hdac_stream_writel(&hext_stream->hstream, SD_LPIB, value);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);