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Release 4.8 sound/hda/hdac_device.c

Directory: sound/hda
/*
 * HD-audio codec core device
 */

#include <linux/init.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/pm_runtime.h>
#include <sound/hdaudio.h>
#include <sound/hda_regmap.h>
#include <sound/pcm.h>
#include "local.h"

static void setup_fg_nodes(struct hdac_device *codec);
static int get_codec_vendor_name(struct hdac_device *codec);


static void default_release(struct device *dev) { snd_hdac_device_exit(container_of(dev, struct hdac_device, dev)); }

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/** * snd_hdac_device_init - initialize the HD-audio codec base device * @codec: device to initialize * @bus: but to attach * @name: device name string * @addr: codec address * * Returns zero for success or a negative error code. * * This function increments the runtime PM counter and marks it active. * The caller needs to turn it off appropriately later. * * The caller needs to set the device's release op properly by itself. */
int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, const char *name, unsigned int addr) { struct device *dev; hda_nid_t fg; int err; dev = &codec->dev; device_initialize(dev); dev->parent = bus->dev; dev->bus = &snd_hda_bus_type; dev->release = default_release; dev->groups = hdac_dev_attr_groups; dev_set_name(dev, "%s", name); device_enable_async_suspend(dev); codec->bus = bus; codec->addr = addr; codec->type = HDA_DEV_CORE; pm_runtime_set_active(&codec->dev); pm_runtime_get_noresume(&codec->dev); atomic_set(&codec->in_pm, 0); err = snd_hdac_bus_add_device(bus, codec); if (err < 0) goto error; /* fill parameters */ codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, AC_PAR_VENDOR_ID); if (codec->vendor_id == -1) { /* read again, hopefully the access method was corrected * in the last read... */ codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, AC_PAR_VENDOR_ID); } codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, AC_PAR_SUBSYSTEM_ID); codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, AC_PAR_REV_ID); setup_fg_nodes(codec); if (!codec->afg && !codec->mfg) { dev_err(dev, "no AFG or MFG node found\n"); err = -ENODEV; goto error; } fg = codec->afg ? codec->afg : codec->mfg; err = snd_hdac_refresh_widgets(codec); if (err < 0) goto error; codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); /* reread ssid if not set by parameter */ if (codec->subsystem_id == -1 || codec->subsystem_id == 0) snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, &codec->subsystem_id); err = get_codec_vendor_name(codec); if (err < 0) goto error; codec->chip_name = kasprintf(GFP_KERNEL, "ID %x", codec->vendor_id & 0xffff); if (!codec->chip_name) { err = -ENOMEM; goto error; } return 0; error: put_device(&codec->dev); return err; }

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EXPORT_SYMBOL_GPL(snd_hdac_device_init); /** * snd_hdac_device_exit - clean up the HD-audio codec base device * @codec: device to clean up */
void snd_hdac_device_exit(struct hdac_device *codec) { pm_runtime_put_noidle(&codec->dev); snd_hdac_bus_remove_device(codec->bus, codec); kfree(codec->vendor_name); kfree(codec->chip_name); }

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EXPORT_SYMBOL_GPL(snd_hdac_device_exit); /** * snd_hdac_device_register - register the hd-audio codec base device * codec: the device to register */
int snd_hdac_device_register(struct hdac_device *codec) { int err; err = device_add(&codec->dev); if (err < 0) return err; err = hda_widget_sysfs_init(codec); if (err < 0) { device_del(&codec->dev); return err; } return 0; }

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EXPORT_SYMBOL_GPL(snd_hdac_device_register); /** * snd_hdac_device_unregister - unregister the hd-audio codec base device * codec: the device to unregister */
void snd_hdac_device_unregister(struct hdac_device *codec) { if (device_is_registered(&codec->dev)) { hda_widget_sysfs_exit(codec); device_del(&codec->dev); } }

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EXPORT_SYMBOL_GPL(snd_hdac_device_unregister); /** * snd_hdac_device_set_chip_name - set/update the codec name * @codec: the HDAC device * @name: name string to set * * Returns 0 if the name is set or updated, or a negative error code. */
int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name) { char *newname; if (!name) return 0; newname = kstrdup(name, GFP_KERNEL); if (!newname) return -ENOMEM; kfree(codec->chip_name); codec->chip_name = newname; return 0; }

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EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name); /** * snd_hdac_codec_modalias - give the module alias name * @codec: HDAC device * @buf: string buffer to store * @size: string buffer size * * Returns the size of string, like snprintf(), or a negative error code. */
int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size) { return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n", codec->vendor_id, codec->revision_id, codec->type); }

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EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias); /** * snd_hdac_make_cmd - compose a 32bit command word to be sent to the * HD-audio controller * @codec: the codec object * @nid: NID to encode * @verb: verb to encode * @parm: parameter to encode * * Return an encoded command verb or -1 for error. */
unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, unsigned int verb, unsigned int parm) { u32 val, addr; addr = codec->addr; if ((addr & ~0xf) || (nid & ~0x7f) || (verb & ~0xfff) || (parm & ~0xffff)) { dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n", addr, nid, verb, parm); return -1; } val = addr << 28; val |= (u32)nid << 20; val |= verb << 8; val |= parm; return val; }

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EXPORT_SYMBOL_GPL(snd_hdac_make_cmd); /** * snd_hdac_exec_verb - execute an encoded verb * @codec: the codec object * @cmd: encoded verb to execute * @flags: optional flags, pass zero for default * @res: the pointer to store the result, NULL if running async * * Returns zero if successful, or a negative error code. * * This calls the exec_verb op when set in hdac_codec. If not, * call the default snd_hdac_bus_exec_verb(). */
int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, unsigned int flags, unsigned int *res) { if (codec->exec_verb) return codec->exec_verb(codec, cmd, flags, res); return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res); }

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EXPORT_SYMBOL_GPL(snd_hdac_exec_verb); /** * snd_hdac_read - execute a verb * @codec: the codec object * @nid: NID to execute a verb * @verb: verb to execute * @parm: parameter for a verb * @res: the pointer to store the result, NULL if running async * * Returns zero if successful, or a negative error code. */
int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, unsigned int verb, unsigned int parm, unsigned int *res) { unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); return snd_hdac_exec_verb(codec, cmd, 0, res); }

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EXPORT_SYMBOL_GPL(snd_hdac_read); /** * _snd_hdac_read_parm - read a parmeter * * This function returns zero or an error unlike snd_hdac_read_parm(). */
int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, unsigned int *res) { unsigned int cmd; cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; return snd_hdac_regmap_read_raw(codec, cmd, res); }

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EXPORT_SYMBOL_GPL(_snd_hdac_read_parm); /** * snd_hdac_read_parm_uncached - read a codec parameter without caching * @codec: the codec object * @nid: NID to read a parameter * @parm: parameter to read * * Returns -1 for error. If you need to distinguish the error more * strictly, use snd_hdac_read() directly. */
int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid, int parm) { unsigned int cmd, val; cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0) return -1; return val; }

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EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached); /** * snd_hdac_override_parm - override read-only parameters * @codec: the codec object * @nid: NID for the parameter * @parm: the parameter to change * @val: the parameter value to overwrite */
int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid, unsigned int parm, unsigned int val) { unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm; int err; if (!codec->regmap) return -EINVAL; codec->caps_overwriting = true; err = snd_hdac_regmap_write_raw(codec, verb, val); codec->caps_overwriting = false; return err; }

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EXPORT_SYMBOL_GPL(snd_hdac_override_parm); /** * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes * @codec: the codec object * @nid: NID to inspect * @start_id: the pointer to store the starting NID * * Returns the number of subtree nodes or zero if not found. * This function reads parameters always without caching. */
int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, hda_nid_t *start_id) { unsigned int parm; parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT); if (parm == -1) { *start_id = 0; return 0; } *start_id = (parm >> 16) & 0x7fff; return (int)(parm & 0x7fff); }

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EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); /* * look for an AFG and MFG nodes */
static void setup_fg_nodes(struct hdac_device *codec) { int i, total_nodes, function_id; hda_nid_t nid; total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); for (i = 0; i < total_nodes; i++, nid++) { function_id = snd_hdac_read_parm(codec, nid, AC_PAR_FUNCTION_TYPE); switch (function_id & 0xff) { case AC_GRP_AUDIO_FUNCTION: codec->afg = nid; codec->afg_function_id = function_id & 0xff; codec->afg_unsol = (function_id >> 8) & 1; break; case AC_GRP_MODEM_FUNCTION: codec->mfg = nid; codec->mfg_function_id = function_id & 0xff; codec->mfg_unsol = (function_id >> 8) & 1; break; default: break; } } }

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/** * snd_hdac_refresh_widgets - Reset the widget start/end nodes * @codec: the codec object */
int snd_hdac_refresh_widgets(struct hdac_device *codec) { hda_nid_t start_nid; int nums; nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); if (!start_nid || nums <= 0 || nums >= 0xff) { dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n", codec->afg); return -EINVAL; } codec->num_nodes = nums; codec->start_nid = start_nid; codec->end_nid = start_nid + nums; return 0; }

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EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); /** * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the * codec sysfs * @codec: the codec object * * first we need to remove sysfs, then refresh widgets and lastly * recreate it */
int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec) { int ret; if (device_is_registered(&codec->dev)) hda_widget_sysfs_exit(codec); ret = snd_hdac_refresh_widgets(codec); if (ret) { dev_err(&codec->dev, "failed to refresh widget: %d\n", ret); return ret; } if (device_is_registered(&codec->dev)) { ret = hda_widget_sysfs_init(codec); if (ret) { dev_err(&codec->dev, "failed to init sysfs: %d\n", ret); return ret; } } return ret; }

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EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs); /* return CONNLIST_LEN parameter of the given widget */
static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) { unsigned int wcaps = get_wcaps(codec, nid); unsigned int parm; if (!(wcaps & AC_WCAP_CONN_LIST) && get_wcaps_type(wcaps) != AC_WID_VOL_KNB) return 0; parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); if (parm == -1) parm = 0; return parm; }

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/** * snd_hdac_get_connections - get a widget connection list * @codec: the codec object * @nid: NID * @conn_list: the array to store the results, can be NULL * @max_conns: the max size of the given array * * Returns the number of connected widgets, zero for no connection, or a * negative error code. When the number of elements don't fit with the * given array size, it returns -ENOSPC. * * When @conn_list is NULL, it just checks the number of connections. */
int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, hda_nid_t *conn_list, int max_conns) { unsigned int parm; int i, conn_len, conns, err; unsigned int shift, num_elems, mask; hda_nid_t prev_nid; int null_count = 0; parm = get_num_conns(codec, nid); if (!parm) return 0; if (parm & AC_CLIST_LONG) { /* long form */ shift = 16; num_elems = 2; } else { /* short form */ shift = 8; num_elems = 4; } conn_len = parm & AC_CLIST_LENGTH; mask = (1 << (shift-1)) - 1; if (!conn_len) return 0; /* no connection */ if (conn_len == 1) { /* single connection */ err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, &parm); if (err < 0) return err; if (conn_list) conn_list[0] = parm & mask; return 1; } /* multi connection */ conns = 0; prev_nid = 0; for (i = 0; i < conn_len; i++) { int range_val; hda_nid_t val, n; if (i % num_elems == 0) { err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, i, &parm); if (err < 0) return -EIO; } range_val = !!(parm & (1 << (shift-1))); /* ranges */ val = parm & mask; if (val == 0 && null_count++) { /* no second chance */ dev_dbg(&codec->dev, "invalid CONNECT_LIST verb %x[%i]:%x\n", nid, i, parm); return 0; } parm >>= shift; if (range_val) { /* ranges between the previous and this one */ if (!prev_nid || prev_nid >= val) { dev_warn(&codec->dev, "invalid dep_range_val %x:%x\n", prev_nid, val); continue; } for (n = prev_nid + 1; n <= val; n++) { if (conn_list) { if (conns >= max_conns) return -ENOSPC; conn_list[conns] = n; } conns++; } } else { if (conn_list) { if (conns >= max_conns) return -ENOSPC; conn_list[conns] = val; } conns++; } prev_nid = val; } return conns; }

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EXPORT_SYMBOL_GPL(snd_hdac_get_connections); #ifdef CONFIG_PM /** * snd_hdac_power_up - power up the codec * @codec: the codec object * * This function calls the runtime PM helper to power up the given codec. * Unlike snd_hdac_power_up_pm(), you should call this only for the code * path that isn't included in PM path. Otherwise it gets stuck. * * Returns zero if successful, or a negative error code. */
int snd_hdac_power_up(struct hdac_device *codec) { return pm_runtime_get_sync(&codec->dev); }

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EXPORT_SYMBOL_GPL(snd_hdac_power_up); /** * snd_hdac_power_down - power down the codec * @codec: the codec object * * Returns zero if successful, or a negative error code. */
int snd_hdac_power_down(struct hdac_device *codec) { struct device *dev = &codec->dev; pm_runtime_mark_last_busy(dev); return pm_runtime_put_autosuspend(dev); }

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EXPORT_SYMBOL_GPL(snd_hdac_power_down); /** * snd_hdac_power_up_pm - power up the codec * @codec: the codec object * * This function can be called in a recursive code path like init code * which may be called by PM suspend/resume again. OTOH, if a power-up * call must wake up the sleeper (e.g. in a kctl callback), use * snd_hdac_power_up() instead. * * Returns zero if successful, or a negative error code. */
int snd_hdac_power_up_pm(struct hdac_device *codec) { if (!atomic_inc_not_zero(&codec->in_pm)) return snd_hdac_power_up(codec); return 0; }

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EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm); /* like snd_hdac_power_up_pm(), but only increment the pm count when * already powered up. Returns -1 if not powered up, 1 if incremented * or 0 if unchanged. Only used in hdac_regmap.c */
int snd_hdac_keep_power_up(struct hdac_device *codec) { if (!atomic_inc_not_zero(&codec->in_pm)) { int ret = pm_runtime_get_if_in_use(&codec->dev); if (!ret) return -1; if (ret < 0) return 0; } return 1; }

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/** * snd_hdac_power_down_pm - power down the codec * @codec: the codec object * * Like snd_hdac_power_up_pm(), this function is used in a recursive * code path like init code which may be called by PM suspend/resume again. * * Returns zero if successful, or a negative error code. */
int snd_hdac_power_down_pm(struct hdac_device *codec) { if (atomic_dec_if_positive(&codec->in_pm) < 0) return snd_hdac_power_down(codec); return 0; }

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EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); #endif /** * snd_hdac_link_power - Enable/disable the link power for a codec * @codec: the codec object * @bool: enable or disable the link power */
int snd_hdac_link_power(struct hdac_device *codec, bool enable) { if (!codec->link_power_control) return 0; if (codec->bus->ops->link_power) return codec->bus->ops->link_power(codec->bus, enable); else return -EINVAL; }

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EXPORT_SYMBOL_GPL(snd_hdac_link_power); /* codec vendor labels */ struct hda_vendor_id { unsigned int id; const char *name; }; static struct hda_vendor_id hda_vendor_ids[] = { { 0x1002, "ATI" }, { 0x1013, "Cirrus Logic" }, { 0x1057, "Motorola" }, { 0x1095, "Silicon Image" }, { 0x10de, "Nvidia" }, { 0x10ec, "Realtek" }, { 0x1102, "Creative" }, { 0x1106, "VIA" }, { 0x111d, "IDT" }, { 0x11c1, "LSI" }, { 0x11d4, "Analog Devices" }, { 0x13f6, "C-Media" }, { 0x14f1, "Conexant" }, { 0x17e8, "Chrontel" }, { 0x1854, "LG" }, { 0x1aec, "Wolfson Microelectronics" }, { 0x1af4, "QEMU" }, { 0x434d, "C-Media" }, { 0x8086, "Intel" }, { 0x8384, "SigmaTel" }, {} /* terminator */ }; /* store the codec vendor name */
static int get_codec_vendor_name(struct hdac_device *codec) { const struct hda_vendor_id *c; u16 vendor_id = codec->vendor_id >> 16; for (c = hda_vendor_ids; c->id; c++) { if (c->id == vendor_id) { codec->vendor_name = kstrdup(c->name, GFP_KERNEL); return codec->vendor_name ? 0 : -ENOMEM; } } codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id); return codec->vendor_name ? 0 : -ENOMEM; }

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/* * stream formats */ struct hda_rate_tbl { unsigned int hz; unsigned int alsa_bits; unsigned int hda_fmt; }; /* rate = base * mult / div */ #define HDA_RATE(base, mult, div) \ (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \ (((div) - 1) << AC_FMT_DIV_SHIFT)) static struct hda_rate_tbl rate_bits[] = { /* rate in Hz, ALSA rate bitmask, HDA format value */ /* autodetected value used in snd_hda_query_supported_pcm */ { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) }, { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) }, { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) }, { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) }, { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) }, { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) }, { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) }, { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) }, { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) }, { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) }, { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) }, #define AC_PAR_PCM_RATE_BITS 11 /* up to bits 10, 384kHZ isn't supported properly */ /* not autodetected value */ { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) }, { 0 } /* terminator */ }; /** * snd_hdac_calc_stream_format - calculate the format bitset * @rate: the sample rate * @channels: the number of channels * @format: the PCM format (SNDRV_PCM_FORMAT_XXX) * @maxbps: the max. bps * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant) * * Calculate the format bitset from the given rate, channels and th PCM format. * * Return zero if invalid. */
unsigned int snd_hdac_calc_stream_format(unsigned int rate,