summaryrefslogtreecommitdiffstats
path: root/kernel/sound/hda/ext
diff options
context:
space:
mode:
authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/sound/hda/ext
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/sound/hda/ext')
-rw-r--r--kernel/sound/hda/ext/Makefile3
-rw-r--r--kernel/sound/hda/ext/hdac_ext_bus.c265
-rw-r--r--kernel/sound/hda/ext/hdac_ext_controller.c302
-rw-r--r--kernel/sound/hda/ext/hdac_ext_stream.c499
4 files changed, 1069 insertions, 0 deletions
diff --git a/kernel/sound/hda/ext/Makefile b/kernel/sound/hda/ext/Makefile
new file mode 100644
index 000000000..9b6f641c7
--- /dev/null
+++ b/kernel/sound/hda/ext/Makefile
@@ -0,0 +1,3 @@
+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/kernel/sound/hda/ext/hdac_ext_bus.c b/kernel/sound/hda/ext/hdac_ext_bus.c
new file mode 100644
index 000000000..2433f7c81
--- /dev/null
+++ b/kernel/sound/hda/ext/hdac_ext_bus.c
@@ -0,0 +1,265 @@
+/*
+ * hdac-ext-bus.c - HD-audio extended core bus functions.
+ *
+ * Copyright (C) 2014-2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#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");
+
+static void hdac_ext_writel(u32 value, u32 __iomem *addr)
+{
+ writel(value, addr);
+}
+
+static u32 hdac_ext_readl(u32 __iomem *addr)
+{
+ return readl(addr);
+}
+
+static void hdac_ext_writew(u16 value, u16 __iomem *addr)
+{
+ writew(value, addr);
+}
+
+static u16 hdac_ext_readw(u16 __iomem *addr)
+{
+ return readw(addr);
+}
+
+static void hdac_ext_writeb(u8 value, u8 __iomem *addr)
+{
+ writeb(value, addr);
+}
+
+static u8 hdac_ext_readb(u8 __iomem *addr)
+{
+ return readb(addr);
+}
+
+static int hdac_ext_dma_alloc_pages(struct hdac_bus *bus, int type,
+ size_t size, struct snd_dma_buffer *buf)
+{
+ return snd_dma_alloc_pages(type, bus->dev, size, buf);
+}
+
+static void hdac_ext_dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf)
+{
+ snd_dma_free_pages(buf);
+}
+
+static const struct hdac_io_ops hdac_ext_default_io = {
+ .reg_writel = hdac_ext_writel,
+ .reg_readl = hdac_ext_readl,
+ .reg_writew = hdac_ext_writew,
+ .reg_readw = hdac_ext_readw,
+ .reg_writeb = hdac_ext_writeb,
+ .reg_readb = hdac_ext_readb,
+ .dma_alloc_pages = hdac_ext_dma_alloc_pages,
+ .dma_free_pages = hdac_ext_dma_free_pages,
+};
+
+/**
+ * snd_hdac_ext_bus_init - initialize a HD-audio extended bus
+ * @ebus: the pointer to extended bus object
+ * @dev: device pointer
+ * @ops: bus verb operators
+ * @io_ops: lowlevel I/O operators, can be NULL. If NULL core will use
+ * default ops
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_ext_bus_init(struct hdac_ext_bus *ebus, struct device *dev,
+ const struct hdac_bus_ops *ops,
+ const struct hdac_io_ops *io_ops)
+{
+ int ret;
+ static int idx;
+
+ /* check if io ops are provided, if not load the defaults */
+ if (io_ops == NULL)
+ io_ops = &hdac_ext_default_io;
+
+ ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops);
+ if (ret < 0)
+ return ret;
+
+ INIT_LIST_HEAD(&ebus->hlink_list);
+ ebus->idx = idx++;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
+
+/**
+ * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
+ * @ebus: the pointer to extended bus object
+ */
+void snd_hdac_ext_bus_exit(struct hdac_ext_bus *ebus)
+{
+ snd_hdac_bus_exit(&ebus->bus);
+ WARN_ON(!list_empty(&ebus->hlink_list));
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
+
+static void default_release(struct device *dev)
+{
+ snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev));
+}
+
+/**
+ * snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
+ * @ebus: hdac extended bus to attach to
+ * @addr: codec address
+ *
+ * Returns zero for success or a negative error code.
+ */
+int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
+{
+ struct hdac_ext_device *edev;
+ struct hdac_device *hdev = NULL;
+ struct hdac_bus *bus = ebus_to_hbus(ebus);
+ char name[15];
+ int ret;
+
+ edev = kzalloc(sizeof(*edev), GFP_KERNEL);
+ if (!edev)
+ return -ENOMEM;
+ hdev = &edev->hdac;
+
+ snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);
+
+ ret = snd_hdac_device_init(hdev, bus, name, addr);
+ if (ret < 0) {
+ dev_err(bus->dev, "device init failed for hdac device\n");
+ return ret;
+ }
+ hdev->type = HDA_DEV_ASOC;
+ hdev->dev.release = default_release;
+
+ ret = snd_hdac_device_register(hdev);
+ if (ret) {
+ dev_err(bus->dev, "failed to register hdac device\n");
+ snd_hdac_ext_bus_device_exit(hdev);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
+
+/**
+ * snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device
+ * @hdev: hdac device to clean up
+ */
+void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
+{
+ struct hdac_ext_device *edev = to_ehdac_device(hdev);
+
+ snd_hdac_device_exit(hdev);
+ kfree(edev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
+
+/**
+ * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
+ *
+ * @ebus: HD-audio extended bus
+ */
+void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus)
+{
+ 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, &ebus->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_ext_driver *get_edrv(struct device *dev)
+{
+ struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
+ struct hdac_ext_driver *edrv = to_ehdac_driver(hdrv);
+
+ return edrv;
+}
+
+static inline struct hdac_ext_device *get_edev(struct device *dev)
+{
+ struct hdac_device *hdev = dev_to_hdac_dev(dev);
+ struct hdac_ext_device *edev = to_ehdac_device(hdev);
+
+ return edev;
+}
+
+static int hda_ext_drv_probe(struct device *dev)
+{
+ return (get_edrv(dev))->probe(get_edev(dev));
+}
+
+static int hdac_ext_drv_remove(struct device *dev)
+{
+ return (get_edrv(dev))->remove(get_edev(dev));
+}
+
+static void hdac_ext_drv_shutdown(struct device *dev)
+{
+ return (get_edrv(dev))->shutdown(get_edev(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_ext_driver *drv)
+{
+ drv->hdac.type = HDA_DEV_ASOC;
+ drv->hdac.driver.bus = &snd_hda_bus_type;
+ /* we use default match */
+
+ if (drv->probe)
+ drv->hdac.driver.probe = hda_ext_drv_probe;
+ if (drv->remove)
+ drv->hdac.driver.remove = hdac_ext_drv_remove;
+ if (drv->shutdown)
+ drv->hdac.driver.shutdown = hdac_ext_drv_shutdown;
+
+ return driver_register(&drv->hdac.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_ext_driver *drv)
+{
+ driver_unregister(&drv->hdac.driver);
+}
+EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);
diff --git a/kernel/sound/hda/ext/hdac_ext_controller.c b/kernel/sound/hda/ext/hdac_ext_controller.c
new file mode 100644
index 000000000..63215b172
--- /dev/null
+++ b/kernel/sound/hda/ext/hdac_ext_controller.c
@@ -0,0 +1,302 @@
+/*
+ * hdac-ext-controller.c - HD-audio extended controller functions.
+ *
+ * Copyright (C) 2014-2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <sound/hda_register.h>
+#include <sound/hdaudio_ext.h>
+
+/*
+ * maximum HDAC capablities we should parse to avoid endless looping:
+ * currently we have 4 extended caps, so this is future proof for now.
+ * extend when this limit is seen meeting in real HW
+ */
+#define HDAC_MAX_CAPS 10
+
+/**
+ * snd_hdac_ext_bus_parse_capabilities - parse capablity structure
+ * @ebus: the pointer to extended bus object
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *ebus)
+{
+ unsigned int cur_cap;
+ unsigned int offset;
+ struct hdac_bus *bus = &ebus->bus;
+ unsigned int counter = 0;
+
+ offset = snd_hdac_chip_readl(bus, LLCH);
+
+ /* Lets walk the linked capabilities list */
+ do {
+ cur_cap = _snd_hdac_chip_read(l, bus, offset);
+
+ dev_dbg(bus->dev, "Capability version: 0x%x\n",
+ ((cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF));
+
+ dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",
+ (cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF);
+
+ switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) {
+ case AZX_ML_CAP_ID:
+ dev_dbg(bus->dev, "Found ML capability\n");
+ ebus->mlcap = bus->remap_addr + offset;
+ break;
+
+ case AZX_GTS_CAP_ID:
+ dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);
+ ebus->gtscap = bus->remap_addr + offset;
+ break;
+
+ case AZX_PP_CAP_ID:
+ /* PP capability found, the Audio DSP is present */
+ dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);
+ ebus->ppcap = bus->remap_addr + offset;
+ break;
+
+ case AZX_SPB_CAP_ID:
+ /* SPIB capability found, handler function */
+ dev_dbg(bus->dev, "Found SPB capability\n");
+ ebus->spbcap = bus->remap_addr + offset;
+ break;
+
+ default:
+ dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap);
+ break;
+ }
+
+ counter++;
+
+ if (counter > HDAC_MAX_CAPS) {
+ dev_err(bus->dev, "We exceeded HDAC Ext capablities!!!\n");
+ break;
+ }
+
+ /* read the offset of next capabiity */
+ offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK;
+
+ } while (offset);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_parse_capabilities);
+
+/*
+ * 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
+ * @ebus: HD-audio extended core bus
+ * @enable: flag to turn on/off the capability
+ */
+void snd_hdac_ext_bus_ppcap_enable(struct hdac_ext_bus *ebus, bool enable)
+{
+ struct hdac_bus *bus = &ebus->bus;
+
+ if (!ebus->ppcap) {
+ dev_err(bus->dev, "Address of PP capability is NULL");
+ return;
+ }
+
+ if (enable)
+ snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_GPROCEN);
+ else
+ snd_hdac_updatel(ebus->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
+ * @ebus: HD-audio extended core bus
+ * @enable: flag to enable/disable interrupt
+ */
+void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_ext_bus *ebus, bool enable)
+{
+ struct hdac_bus *bus = &ebus->bus;
+
+ if (!ebus->ppcap) {
+ dev_err(bus->dev, "Address of PP capability is NULL\n");
+ return;
+ }
+
+ if (enable)
+ snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_PIE);
+ else
+ snd_hdac_updatel(ebus->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
+ * @ebus: HD-audio extended core bus
+ *
+ * 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_ext_bus *ebus)
+{
+ int idx;
+ u32 link_count;
+ struct hdac_ext_link *hlink;
+ struct hdac_bus *bus = &ebus->bus;
+
+ link_count = readl(ebus->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 = ebus->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);
+
+ list_add_tail(&hlink->list, &ebus->hlink_list);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities);
+
+/**
+ * snd_hdac_link_free_all- free hdac extended link objects
+ *
+ * @ebus: HD-audio ext core bus
+ */
+
+void snd_hdac_link_free_all(struct hdac_ext_bus *ebus)
+{
+ struct hdac_ext_link *l;
+
+ while (!list_empty(&ebus->hlink_list)) {
+ l = list_first_entry(&ebus->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_get_link_index - get link based on codec name
+ * @ebus: HD-audio extended core bus
+ * @codec_name: codec name
+ */
+struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_ext_bus *ebus,
+ const char *codec_name)
+{
+ int i;
+ struct hdac_ext_link *hlink = NULL;
+ int bus_idx, addr;
+
+ if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2)
+ return NULL;
+ if (ebus->idx != bus_idx)
+ return NULL;
+
+ list_for_each_entry(hlink, &ebus->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_get_link);
+
+static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable)
+{
+ int timeout;
+ u32 val;
+ int mask = (1 << AZX_MLCTL_CPA);
+
+ udelay(3);
+ timeout = 50;
+
+ do {
+ val = readl(link->ml_addr + AZX_REG_ML_LCTL);
+ if (enable) {
+ if (((val & mask) >> AZX_MLCTL_CPA))
+ return 0;
+ } else {
+ if (!((val & mask) >> AZX_MLCTL_CPA))
+ 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, 0, AZX_MLCTL_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_MLCTL_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_down_all -power down all hda link
+ * @ebus: HD-audio extended bus
+ */
+int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus)
+{
+ struct hdac_ext_link *hlink = NULL;
+ int ret;
+
+ list_for_each_entry(hlink, &ebus->hlink_list, list) {
+ snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_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);
diff --git a/kernel/sound/hda/ext/hdac_ext_stream.c b/kernel/sound/hda/ext/hdac_ext_stream.c
new file mode 100644
index 000000000..cb89ec7c8
--- /dev/null
+++ b/kernel/sound/hda/ext/hdac_ext_stream.c
@@ -0,0 +1,499 @@
+/*
+ * hdac-ext-stream.c - HD-audio extended stream operations.
+ *
+ * Copyright (C) 2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#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)
+ * @ebus: HD-audio ext core bus
+ * @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
+ */
+void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus,
+ struct hdac_ext_stream *stream,
+ int idx, int direction, int tag)
+{
+ struct hdac_bus *bus = &ebus->bus;
+
+ if (ebus->ppcap) {
+ stream->pphc_addr = ebus->ppcap + AZX_PPHC_BASE +
+ AZX_PPHC_INTERVAL * idx;
+
+ stream->pplc_addr = ebus->ppcap + AZX_PPLC_BASE +
+ AZX_PPLC_MULTI * ebus->num_streams +
+ AZX_PPLC_INTERVAL * idx;
+ }
+
+ if (ebus->spbcap) {
+ stream->spib_addr = ebus->spbcap + AZX_SPB_BASE +
+ AZX_SPB_INTERVAL * idx +
+ AZX_SPB_SPIB;
+
+ stream->fifo_addr = ebus->spbcap + AZX_SPB_BASE +
+ AZX_SPB_INTERVAL * idx +
+ AZX_SPB_MAXFIFO;
+ }
+
+ stream->decoupled = false;
+ snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
+
+/**
+ * snd_hdac_ext_stream_init_all - create and initialize the stream objects
+ * for an extended hda bus
+ * @ebus: HD-audio ext 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_ext_bus *ebus, 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 *stream =
+ kzalloc(sizeof(*stream), GFP_KERNEL);
+ if (!stream)
+ return -ENOMEM;
+ tag = ++stream_tag;
+ snd_hdac_ext_stream_init(ebus, stream, idx, dir, tag);
+ idx++;
+ }
+
+ return 0;
+
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
+
+/**
+ * snd_hdac_stream_free_all - free hdac extended stream objects
+ *
+ * @ebus: HD-audio ext core bus
+ */
+void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus)
+{
+ struct hdac_stream *s;
+ struct hdac_ext_stream *stream;
+ struct hdac_bus *bus = ebus_to_hbus(ebus);
+
+ while (!list_empty(&bus->stream_list)) {
+ s = list_first_entry(&bus->stream_list, struct hdac_stream, list);
+ stream = stream_to_hdac_ext_stream(s);
+ list_del(&s->list);
+ kfree(stream);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
+
+/**
+ * snd_hdac_ext_stream_decouple - decouple the hdac stream
+ * @ebus: HD-audio ext core bus
+ * @stream: HD-audio ext core stream object to initialize
+ * @decouple: flag to decouple
+ */
+void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus,
+ struct hdac_ext_stream *stream, bool decouple)
+{
+ struct hdac_stream *hstream = &stream->hstream;
+ struct hdac_bus *bus = &ebus->bus;
+
+ spin_lock_irq(&bus->reg_lock);
+ if (decouple)
+ snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0,
+ AZX_PPCTL_PROCEN(hstream->index));
+ else
+ snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL,
+ AZX_PPCTL_PROCEN(hstream->index), 0);
+ stream->decoupled = decouple;
+ spin_unlock_irq(&bus->reg_lock);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
+
+/**
+ * snd_hdac_ext_linkstream_start - start a stream
+ * @stream: HD-audio ext core stream to start
+ */
+void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
+{
+ snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
+
+/**
+ * snd_hdac_ext_link_stream_clear - stop a stream DMA
+ * @stream: HD-audio ext core stream to stop
+ */
+void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
+{
+ snd_hdac_updatel(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
+ * @stream: HD-audio ext core stream to reset
+ */
+void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
+{
+ unsigned char val;
+ int timeout;
+
+ snd_hdac_ext_link_stream_clear(stream);
+
+ snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST);
+ udelay(3);
+ timeout = 50;
+ do {
+ val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
+ AZX_PPLCCTL_STRST;
+ if (val)
+ break;
+ udelay(3);
+ } while (--timeout);
+ val &= ~AZX_PPLCCTL_STRST;
+ writel(val, 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(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
+ * @stream: HD-audio ext core stream to set up
+ * @fmt: stream format
+ */
+int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
+{
+ struct hdac_stream *hstream = &stream->hstream;
+ unsigned int val;
+
+ /* make sure the run bit is zero for SD */
+ snd_hdac_ext_link_stream_clear(stream);
+ /* program the stream_tag */
+ val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
+ val = (val & ~AZX_PPLCCTL_STRM_MASK) |
+ (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
+ writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
+
+ /* program the stream format */
+ writew(fmt, 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, 0, (1 << stream));
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
+
+static struct hdac_ext_stream *
+hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus,
+ struct snd_pcm_substream *substream)
+{
+ struct hdac_ext_stream *res = NULL;
+ struct hdac_stream *stream = NULL;
+ struct hdac_bus *hbus = &ebus->bus;
+
+ if (!ebus->ppcap) {
+ dev_err(hbus->dev, "stream type not supported\n");
+ return NULL;
+ }
+
+ list_for_each_entry(stream, &hbus->stream_list, list) {
+ struct hdac_ext_stream *hstream = container_of(stream,
+ struct hdac_ext_stream,
+ hstream);
+ if (stream->direction != substream->stream)
+ continue;
+
+ /* check if decoupled stream and not in use is available */
+ if (hstream->decoupled && !hstream->link_locked) {
+ res = hstream;
+ break;
+ }
+
+ if (!hstream->link_locked) {
+ snd_hdac_ext_stream_decouple(ebus, hstream, true);
+ res = hstream;
+ break;
+ }
+ }
+ if (res) {
+ spin_lock_irq(&hbus->reg_lock);
+ res->link_locked = 1;
+ res->link_substream = substream;
+ spin_unlock_irq(&hbus->reg_lock);
+ }
+ return res;
+}
+
+static struct hdac_ext_stream *
+hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus,
+ struct snd_pcm_substream *substream)
+{
+ struct hdac_ext_stream *res = NULL;
+ struct hdac_stream *stream = NULL;
+ struct hdac_bus *hbus = &ebus->bus;
+
+ if (!ebus->ppcap) {
+ dev_err(hbus->dev, "stream type not supported\n");
+ return NULL;
+ }
+
+ list_for_each_entry(stream, &hbus->stream_list, list) {
+ struct hdac_ext_stream *hstream = container_of(stream,
+ struct hdac_ext_stream,
+ hstream);
+ if (stream->direction != substream->stream)
+ continue;
+
+ if (!stream->opened) {
+ if (!hstream->decoupled)
+ snd_hdac_ext_stream_decouple(ebus, hstream, true);
+ res = hstream;
+ break;
+ }
+ }
+ if (res) {
+ spin_lock_irq(&hbus->reg_lock);
+ res->hstream.opened = 1;
+ res->hstream.running = 0;
+ res->hstream.substream = substream;
+ spin_unlock_irq(&hbus->reg_lock);
+ }
+
+ return res;
+}
+
+/**
+ * snd_hdac_ext_stream_assign - assign a stream for the PCM
+ * @ebus: HD-audio ext 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_ext_bus *ebus,
+ struct snd_pcm_substream *substream,
+ int type)
+{
+ struct hdac_ext_stream *hstream = NULL;
+ struct hdac_stream *stream = NULL;
+ struct hdac_bus *hbus = &ebus->bus;
+
+ switch (type) {
+ case HDAC_EXT_STREAM_TYPE_COUPLED:
+ stream = snd_hdac_stream_assign(hbus, substream);
+ if (stream)
+ hstream = container_of(stream,
+ struct hdac_ext_stream, hstream);
+ return hstream;
+
+ case HDAC_EXT_STREAM_TYPE_HOST:
+ return hdac_ext_host_stream_assign(ebus, substream);
+
+ case HDAC_EXT_STREAM_TYPE_LINK:
+ return hdac_ext_link_stream_assign(ebus, substream);
+
+ default:
+ return NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
+
+/**
+ * snd_hdac_ext_stream_release - release the assigned stream
+ * @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 *stream, int type)
+{
+ struct hdac_bus *bus = stream->hstream.bus;
+ struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
+
+ switch (type) {
+ case HDAC_EXT_STREAM_TYPE_COUPLED:
+ snd_hdac_stream_release(&stream->hstream);
+ break;
+
+ case HDAC_EXT_STREAM_TYPE_HOST:
+ if (stream->decoupled && !stream->link_locked)
+ snd_hdac_ext_stream_decouple(ebus, stream, false);
+ snd_hdac_stream_release(&stream->hstream);
+ break;
+
+ case HDAC_EXT_STREAM_TYPE_LINK:
+ if (stream->decoupled && !stream->hstream.opened)
+ snd_hdac_ext_stream_decouple(ebus, stream, false);
+ spin_lock_irq(&bus->reg_lock);
+ stream->link_locked = 0;
+ 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
+ * @ebus: HD-audio ext 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_ext_bus *ebus,
+ bool enable, int index)
+{
+ u32 mask = 0;
+ u32 register_mask = 0;
+ struct hdac_bus *bus = &ebus->bus;
+
+ if (!ebus->spbcap) {
+ dev_err(bus->dev, "Address of SPB capability is NULL");
+ return;
+ }
+
+ mask |= (1 << index);
+
+ register_mask = readl(ebus->spbcap + AZX_REG_SPB_SPBFCCTL);
+
+ mask |= register_mask;
+
+ if (enable)
+ snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask);
+ else
+ snd_hdac_updatel(ebus->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
+ * @ebus: HD-audio ext core bus
+ * @stream: hdac_ext_stream
+ * @value: spib value to set
+ */
+int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus,
+ struct hdac_ext_stream *stream, u32 value)
+{
+ struct hdac_bus *bus = &ebus->bus;
+
+ if (!ebus->spbcap) {
+ dev_err(bus->dev, "Address of SPB capability is NULL");
+ return -EINVAL;
+ }
+
+ writel(value, 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
+ * @ebus: HD-audio ext core bus
+ * @stream: hdac_ext_stream
+ *
+ * Return maxfifo for the stream
+ */
+int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_ext_bus *ebus,
+ struct hdac_ext_stream *stream)
+{
+ struct hdac_bus *bus = &ebus->bus;
+
+ if (!ebus->spbcap) {
+ dev_err(bus->dev, "Address of SPB capability is NULL");
+ return -EINVAL;
+ }
+
+ return readl(stream->fifo_addr);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
+
+
+/**
+ * snd_hdac_ext_stop_streams - stop all stream if running
+ * @ebus: HD-audio ext core bus
+ */
+void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus)
+{
+ struct hdac_bus *bus = ebus_to_hbus(ebus);
+ struct hdac_stream *stream;
+
+ if (bus->chip_init) {
+ list_for_each_entry(stream, &bus->stream_list, list)
+ snd_hdac_stream_stop(stream);
+ snd_hdac_bus_stop_chip(bus);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);