diff options
author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2023-04-04 13:41:15 +0300 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2023-04-06 18:45:39 +0300 |
commit | 17c9b6ec35c0d6228db4f94590702a0cb03cd96a (patch) | |
tree | bfbd099389d9a5ea50246f289ef581cfa9fb5ca2 /sound | |
parent | 18227585d8374ce16d3a2792deb125794710de43 (diff) | |
download | linux-17c9b6ec35c0d6228db4f94590702a0cb03cd96a.tar.xz |
ASoC: SOF: Intel: hda-mlink: add structures to parse ALT links
Extend hdac_ext_link to store information needed for ALT
links. Follow-up patches will include more functional patches for
power-up and down.
Note that this patch suggests the use of an 'eml_lock' to serialize
access to shared registers. SoundWire-specific sequence require the
lock to be taken at a higher level, as a result the helpers added in
follow-up patches will provide 'unlocked' versions when needed.
Also note that the low-level sequences with the 'hdaml_' prefix are
taken directly from the hardware specifications - naming conventions
included. The code will be split in two, with locking and linked-list
management handled separately to avoid mixing required hardware setup
and Linux-based resource management.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230404104127.5629-7-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r-- | sound/soc/sof/intel/hda-mlink.c | 221 | ||||
-rw-r--r-- | sound/soc/sof/intel/hda.c | 2 |
2 files changed, 217 insertions, 6 deletions
diff --git a/sound/soc/sof/intel/hda-mlink.c b/sound/soc/sof/intel/hda-mlink.c index fbf86f2350fb..e6b20182f099 100644 --- a/sound/soc/sof/intel/hda-mlink.c +++ b/sound/soc/sof/intel/hda-mlink.c @@ -14,28 +14,239 @@ #include <sound/hda_register.h> #include <sound/hda-mlink.h> +#include <linux/bitfield.h> #include <linux/module.h> #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_MLINK) -int hda_bus_ml_get_capabilities(struct hdac_bus *bus) +/** + * struct hdac_ext2_link - HDAudio extended+alternate link + * + * @hext_link: hdac_ext_link + * @alt: flag set for alternate extended links + * @intc: boolean for interrupt capable + * @ofls: boolean for offload support + * @lss: boolean for link synchronization capabilities + * @slcount: sublink count + * @elid: extended link ID (AZX_REG_ML_LEPTR_ID_ defines) + * @elver: extended link version + * @leptr: extended link pointer + * @eml_lock: mutual exclusion to access shared registers e.g. CPA/SPA bits + * in LCTL register + * @base_ptr: pointer to shim/ip/shim_vs space + * @instance_offset: offset between each of @slcount instances managed by link + * @shim_offset: offset to SHIM register base + * @ip_offset: offset to IP register base + * @shim_vs_offset: offset to vendor-specific (VS) SHIM base + */ +struct hdac_ext2_link { + struct hdac_ext_link hext_link; + + /* read directly from LCAP register */ + bool alt; + bool intc; + bool ofls; + bool lss; + int slcount; + int elid; + int elver; + u32 leptr; + + struct mutex eml_lock; /* prevent concurrent access to e.g. CPA/SPA */ + + /* internal values computed from LCAP contents */ + void __iomem *base_ptr; + u32 instance_offset; + u32 shim_offset; + u32 ip_offset; + u32 shim_vs_offset; +}; + +#define hdac_ext_link_to_ext2(h) container_of(h, struct hdac_ext2_link, hext_link) + +#define AZX_REG_SDW_INSTANCE_OFFSET 0x8000 +#define AZX_REG_SDW_SHIM_OFFSET 0x0 +#define AZX_REG_SDW_IP_OFFSET 0x100 +#define AZX_REG_SDW_VS_SHIM_OFFSET 0x6000 + +/* only one instance supported */ +#define AZX_REG_INTEL_DMIC_SHIM_OFFSET 0x0 +#define AZX_REG_INTEL_DMIC_IP_OFFSET 0x100 +#define AZX_REG_INTEL_DMIC_VS_SHIM_OFFSET 0x6000 + +#define AZX_REG_INTEL_SSP_INSTANCE_OFFSET 0x1000 +#define AZX_REG_INTEL_SSP_SHIM_OFFSET 0x0 +#define AZX_REG_INTEL_SSP_IP_OFFSET 0x100 +#define AZX_REG_INTEL_SSP_VS_SHIM_OFFSET 0xC00 + +/* only one instance supported */ +#define AZX_REG_INTEL_UAOL_SHIM_OFFSET 0x0 +#define AZX_REG_INTEL_UAOL_IP_OFFSET 0x100 +#define AZX_REG_INTEL_UAOL_VS_SHIM_OFFSET 0xC00 + +/* HDAML section - this part follows sequences in the hardware specification, + * including naming conventions and the use of the hdaml_ prefix. + * The code is intentionally minimal with limited dependencies on frameworks or + * helpers. Locking and scanning lists is handled at a higher level + */ + +static int hdaml_lnk_enum(struct device *dev, struct hdac_ext2_link *h2link, + void __iomem *ml_addr, int link_idx) { - if (bus->mlcap) - return snd_hdac_ext_bus_get_ml_capabilities(bus); + struct hdac_ext_link *hlink = &h2link->hext_link; + u32 base_offset; + + hlink->lcaps = readl(ml_addr + AZX_REG_ML_LCAP); + + h2link->alt = FIELD_GET(AZX_ML_HDA_LCAP_ALT, hlink->lcaps); + + /* handle alternate extensions */ + if (!h2link->alt) { + h2link->slcount = 1; + + /* + * LSDIID is initialized by hardware for HDaudio link, + * it needs to be setup by software for alternate links + */ + hlink->lsdiid = readw(ml_addr + AZX_REG_ML_LSDIID); + + dev_dbg(dev, "Link %d: HDAudio - lsdiid=%d\n", + link_idx, hlink->lsdiid); + + return 0; + } + + h2link->intc = FIELD_GET(AZX_ML_HDA_LCAP_INTC, hlink->lcaps); + h2link->ofls = FIELD_GET(AZX_ML_HDA_LCAP_OFLS, hlink->lcaps); + h2link->lss = FIELD_GET(AZX_ML_HDA_LCAP_LSS, hlink->lcaps); + + /* read slcount (increment due to zero-based hardware representation */ + h2link->slcount = FIELD_GET(AZX_ML_HDA_LCAP_SLCOUNT, hlink->lcaps) + 1; + dev_dbg(dev, "Link %d: HDAudio extended - sublink count %d\n", + link_idx, h2link->slcount); + + /* find IP ID and offsets */ + h2link->leptr = readl(hlink->ml_addr + AZX_REG_ML_LEPTR); + + h2link->elid = FIELD_GET(AZX_REG_ML_LEPTR_ID, h2link->leptr); + + base_offset = FIELD_GET(AZX_REG_ML_LEPTR_PTR, h2link->leptr); + h2link->base_ptr = hlink->ml_addr + base_offset; + + switch (h2link->elid) { + case AZX_REG_ML_LEPTR_ID_SDW: + h2link->shim_offset = AZX_REG_SDW_SHIM_OFFSET; + h2link->ip_offset = AZX_REG_SDW_IP_OFFSET; + h2link->shim_vs_offset = AZX_REG_SDW_VS_SHIM_OFFSET; + dev_dbg(dev, "Link %d: HDAudio extended - SoundWire alternate link, leptr.ptr %#x\n", + link_idx, base_offset); + break; + case AZX_REG_ML_LEPTR_ID_INTEL_DMIC: + h2link->shim_offset = AZX_REG_INTEL_DMIC_SHIM_OFFSET; + h2link->ip_offset = AZX_REG_INTEL_DMIC_IP_OFFSET; + h2link->shim_vs_offset = AZX_REG_INTEL_DMIC_VS_SHIM_OFFSET; + dev_dbg(dev, "Link %d: HDAudio extended - INTEL DMIC alternate link, leptr.ptr %#x\n", + link_idx, base_offset); + break; + case AZX_REG_ML_LEPTR_ID_INTEL_SSP: + h2link->shim_offset = AZX_REG_INTEL_SSP_SHIM_OFFSET; + h2link->ip_offset = AZX_REG_INTEL_SSP_IP_OFFSET; + h2link->shim_vs_offset = AZX_REG_INTEL_SSP_VS_SHIM_OFFSET; + dev_dbg(dev, "Link %d: HDAudio extended - INTEL SSP alternate link, leptr.ptr %#x\n", + link_idx, base_offset); + break; + case AZX_REG_ML_LEPTR_ID_INTEL_UAOL: + h2link->shim_offset = AZX_REG_INTEL_UAOL_SHIM_OFFSET; + h2link->ip_offset = AZX_REG_INTEL_UAOL_IP_OFFSET; + h2link->shim_vs_offset = AZX_REG_INTEL_UAOL_VS_SHIM_OFFSET; + dev_dbg(dev, "Link %d: HDAudio extended - INTEL UAOL alternate link, leptr.ptr %#x\n", + link_idx, base_offset); + break; + default: + dev_err(dev, "Link %d: HDAudio extended - Unsupported alternate link, leptr.id=%#02x value\n", + link_idx, h2link->elid); + return -EINVAL; + } return 0; } -EXPORT_SYMBOL_NS(hda_bus_ml_get_capabilities, SND_SOC_SOF_HDA_MLINK); + +/* END HDAML section */ + +static int hda_ml_alloc_h2link(struct hdac_bus *bus, int index) +{ + struct hdac_ext2_link *h2link; + struct hdac_ext_link *hlink; + int ret; + + h2link = kzalloc(sizeof(*h2link), GFP_KERNEL); + if (!h2link) + return -ENOMEM; + + /* basic initialization */ + hlink = &h2link->hext_link; + + hlink->index = index; + hlink->bus = bus; + hlink->ml_addr = bus->mlcap + AZX_ML_BASE + (AZX_ML_INTERVAL * index); + + ret = hdaml_lnk_enum(bus->dev, h2link, hlink->ml_addr, index); + if (ret < 0) { + kfree(h2link); + return ret; + } + + mutex_init(&h2link->eml_lock); + + list_add_tail(&hlink->list, &bus->hlink_list); + + /* + * HDaudio regular links are powered-on by default, the + * refcount needs to be initialized. + */ + if (!h2link->alt) + hlink->ref_count = 1; + + return 0; +} + +int hda_bus_ml_init(struct hdac_bus *bus) +{ + u32 link_count; + int ret; + int i; + + if (!bus->mlcap) + return 0; + + link_count = readl(bus->mlcap + AZX_REG_ML_MLCD) + 1; + + dev_dbg(bus->dev, "HDAudio Multi-Link count: %d\n", link_count); + + for (i = 0; i < link_count; i++) { + ret = hda_ml_alloc_h2link(bus, i); + if (ret < 0) { + hda_bus_ml_free(bus); + return ret; + } + } + return 0; +} +EXPORT_SYMBOL_NS(hda_bus_ml_init, SND_SOC_SOF_HDA_MLINK); void hda_bus_ml_free(struct hdac_bus *bus) { struct hdac_ext_link *hlink, *_h; + struct hdac_ext2_link *h2link; if (!bus->mlcap) return; list_for_each_entry_safe(hlink, _h, &bus->hlink_list, list) { list_del(&hlink->list); - kfree(hlink); + h2link = hdac_ext_link_to_ext2(hlink); + + mutex_destroy(&h2link->eml_lock); + kfree(h2link); } } EXPORT_SYMBOL_NS(hda_bus_ml_free, SND_SOC_SOF_HDA_MLINK); diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c index 8845ae255f1e..5980cf1e27a3 100644 --- a/sound/soc/sof/intel/hda.c +++ b/sound/soc/sof/intel/hda.c @@ -918,7 +918,7 @@ static int hda_init_caps(struct snd_sof_dev *sdev) return ret; } - hda_bus_ml_get_capabilities(bus); + hda_bus_ml_init(bus); /* Skip SoundWire if it is not supported */ if (!(interface_mask & BIT(SOF_DAI_INTEL_ALH))) |