diff options
Diffstat (limited to 'sound/hda/ext')
| -rw-r--r-- | sound/hda/ext/Makefile | 4 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_bus.c | 142 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_controller.c | 375 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_stream.c | 532 |
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); |