diff options
Diffstat (limited to 'sound/hda/core/ext/stream.c')
| -rw-r--r-- | sound/hda/core/ext/stream.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/sound/hda/core/ext/stream.c b/sound/hda/core/ext/stream.c new file mode 100644 index 000000000000..a3ac738f1130 --- /dev/null +++ b/sound/hda/core/ext/stream.c @@ -0,0 +1,453 @@ +// 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/pci.h> +#include <linux/pci_ids.h> +#include <linux/slab.h> +#include <sound/pcm.h> +#include <sound/hda_register.h> +#include <sound/hdaudio_ext.h> +#include <sound/compress_driver.h> + +/** + * snd_hdac_ext_host_stream_setup - Setup a HOST stream. + * @hext_stream: HDAudio stream to set up. + * @code_loading: Whether the stream is for PCM or code-loading. + * + * Return: Zero on success or negative error code. + */ +int snd_hdac_ext_host_stream_setup(struct hdac_ext_stream *hext_stream, bool code_loading) +{ + return hext_stream->host_setup(hdac_stream(hext_stream), code_loading); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_host_stream_setup); + +/** + * snd_hdac_apl_host_stream_setup - Setup a HOST stream following procedure + * recommended for ApolloLake devices. + * @hstream: HDAudio stream to set up. + * @code_loading: Whether the stream is for PCM or code-loading. + * + * Return: Zero on success or negative error code. + */ +static int snd_hdac_apl_host_stream_setup(struct hdac_stream *hstream, bool code_loading) +{ + struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream); + int ret; + + snd_hdac_ext_stream_decouple(hstream->bus, hext_stream, false); + ret = snd_hdac_stream_setup(hstream, code_loading); + snd_hdac_ext_stream_decouple(hstream->bus, hext_stream, true); + + return ret; +} + +/** + * 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; + } + + 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) +{ + struct pci_dev *pci = to_pci_dev(bus->dev); + int (*setup_op)(struct hdac_stream *, bool); + int stream_tag = 0; + int i, tag, idx = start_idx; + + if (pci->device == PCI_DEVICE_ID_INTEL_HDA_APL) + setup_op = snd_hdac_apl_host_stream_setup; + else + setup_op = snd_hdac_stream_setup; + + 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++; + hext_stream->host_setup = setup_op; + } + + 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_stream_start - start a stream + * @hext_stream: HD-audio ext core stream to start + */ +void snd_hdac_ext_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_stream_start); + +/** + * snd_hdac_ext_stream_clear - stop a stream DMA + * @hext_stream: HD-audio ext core stream to stop + */ +void snd_hdac_ext_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_stream_clear); + +/** + * snd_hdac_ext_stream_reset - reset a stream + * @hext_stream: HD-audio ext core stream to reset + */ +void snd_hdac_ext_stream_reset(struct hdac_ext_stream *hext_stream) +{ + unsigned char val; + int timeout; + + snd_hdac_ext_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_stream_reset); + +/** + * snd_hdac_ext_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_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_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_stream_setup); + +static struct hdac_ext_stream * +hdac_ext_link_dma_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_dma_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_dma_stream_assign(bus, substream); + + case HDAC_EXT_STREAM_TYPE_LINK: + return hdac_ext_link_dma_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_cstream_assign - assign a host stream for compress + * @bus: HD-audio core bus + * @cstream: Compress stream to assign + * + * Assign an unused host stream for the given compress stream. + * If no stream is free, NULL is returned. Stream is decoupled + * before assignment. + */ +struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus, + struct snd_compr_stream *cstream) +{ + struct hdac_ext_stream *res = NULL; + struct hdac_stream *hstream; + + spin_lock_irq(&bus->reg_lock); + list_for_each_entry(hstream, &bus->stream_list, list) { + struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream); + + if (hstream->direction != cstream->direction) + 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.cstream = cstream; + } + spin_unlock_irq(&bus->reg_lock); + + return res; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_cstream_assign); |