diff options
Diffstat (limited to 'sound/hda/ext')
| -rw-r--r-- | sound/hda/ext/Makefile | 2 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_controller.c | 270 |
2 files changed, 271 insertions, 1 deletions
diff --git a/sound/hda/ext/Makefile b/sound/hda/ext/Makefile index 2e583e664916..934b7bf5d87f 100644 --- a/sound/hda/ext/Makefile +++ b/sound/hda/ext/Makefile @@ -1,3 +1,3 @@ -snd-hda-ext-core-objs := hdac_ext_bus.o +snd-hda-ext-core-objs := hdac_ext_bus.o hdac_ext_controller.o obj-$(CONFIG_SND_HDA_EXT_CORE) += snd-hda-ext-core.o diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c new file mode 100644 index 000000000000..adffc89541c9 --- /dev/null +++ b/sound/hda/ext/hdac_ext_controller.c @@ -0,0 +1,270 @@ +/* + * 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); + + if (offset < 0) + return -EIO; + + /* Lets walk the linked capabilities list */ + do { + cur_cap = _snd_hdac_chip_read(l, bus, offset); + + if (cur_cap < 0) + return -EIO; + + 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 = snd_hdac_chip_readl(bus, ML_LCAP); + hlink->lsdiid = snd_hdac_chip_readw(bus, ML_LSDIID); + + list_add_tail(&hlink->list, &ebus->hlink_list); + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities); + +/** + * 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 = snd_hdac_chip_readl(link->bus, 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_chip_updatel(link->bus, 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_chip_updatel(link->bus, ML_LCTL, AZX_MLCTL_SPA, 0); + + return check_hdac_link_power_active(link, false); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); |