/* * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management * * Copyright 2005 Wolfson Microelectronics PLC. * Author: Liam Girdwood <lrg@slimlogic.co.uk> * * 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; either version 2 of the License, or (at your * option) any later version. * * Features: * o Changes power status of internal codec blocks depending on the * dynamic configuration of codec internal audio paths and active * DACs/ADCs. * o Platform power domain - can support external components i.e. amps and * mic/meadphone insertion events. * o Automatic Mic Bias support * o Jack insertion power event initiation - e.g. hp insertion will enable * sinks, dacs, etc * o Delayed powerdown of audio susbsystem to reduce pops between a quick * device reopen. * * Todo: * o DAPM power change sequencing - allow for configurable per * codec sequences. * o Support for analogue bias optimisation. * o Support for reduced codec oversampling rates. * o Support for reduced codec bias currents. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/bitops.h> #include <linux/platform_device.h> #include <linux/jiffies.h> #include <linux/debugfs.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc-dapm.h> #include <sound/initval.h> /* dapm power sequences - make this per codec in the future */ static int dapm_up_seq[] = { [snd_soc_dapm_pre] = 0, [snd_soc_dapm_supply] = 1, [snd_soc_dapm_micbias] = 2, [snd_soc_dapm_aif_in] = 3, [snd_soc_dapm_aif_out] = 3, [snd_soc_dapm_mic] = 4, [snd_soc_dapm_mux] = 5, [snd_soc_dapm_value_mux] = 5, [snd_soc_dapm_dac] = 6, [snd_soc_dapm_mixer] = 7, [snd_soc_dapm_mixer_named_ctl] = 7, [snd_soc_dapm_pga] = 8, [snd_soc_dapm_adc] = 9, [snd_soc_dapm_hp] = 10, [snd_soc_dapm_spk] = 10, [snd_soc_dapm_post] = 11, }; static int dapm_down_seq[] = { [snd_soc_dapm_pre] = 0, [snd_soc_dapm_adc] = 1, [snd_soc_dapm_hp] = 2, [snd_soc_dapm_spk] = 2, [snd_soc_dapm_pga] = 4, [snd_soc_dapm_mixer_named_ctl] = 5, [snd_soc_dapm_mixer] = 5, [snd_soc_dapm_dac] = 6, [snd_soc_dapm_mic] = 7, [snd_soc_dapm_micbias] = 8, [snd_soc_dapm_mux] = 9, [snd_soc_dapm_value_mux] = 9, [snd_soc_dapm_aif_in] = 10, [snd_soc_dapm_aif_out] = 10, [snd_soc_dapm_supply] = 11, [snd_soc_dapm_post] = 12, }; static void pop_wait(u32 pop_time) { if (pop_time) schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time)); } static void pop_dbg(u32 pop_time, const char *fmt, ...) { va_list args; va_start(args, fmt); if (pop_time) { vprintk(fmt, args); pop_wait(pop_time); } va_end(args); } /* create a new dapm widget */ static inline struct snd_soc_dapm_widget *dapm_cnew_widget( const struct snd_soc_dapm_widget *_widget) { return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL); } /** * snd_soc_dapm_set_bias_level - set the bias level for the system * @socdev: audio device * @level: level to configure * * Configure the bias (power) levels for the SoC audio device. * * Returns 0 for success else error. */ static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev, enum snd_soc_bias_level level) { struct snd_soc_card *card = socdev->card; struct snd_soc_codec *codec = socdev->card->codec; int ret = 0; switch (level) { case SND_SOC_BIAS_ON: dev_dbg(socdev->dev, "Setting full bias\n"); break; case SND_SOC_BIAS_PREPARE: dev_dbg(socdev->dev, "Setting bias prepare\n"); break; case SND_SOC_BIAS_STANDBY: dev_dbg(socdev->dev, "Setting standby bias\n"); break; case SND_SOC_BIAS_OFF: dev_dbg(socdev->dev, "Setting bias off\n"); break; default: dev_err(socdev->dev, "Setting invalid bias %d\n", level); return -EINVAL; } if (card->set_bias_level) ret = card->set_bias_level(card, level); if (ret == 0) { if (codec->set_bias_level) ret = codec->set_bias_level(codec, level); else codec->bias_level = level; } return ret; } /* set up initial codec paths */ static void dapm_set_path_status(struct snd_soc_dapm_widget *w, struct snd_soc_dapm_path *p, int i) { switch (w->id) { case snd_soc_dapm_switch: case snd_soc_dapm_mixer: case snd_soc_dapm_mixer_named_ctl: { int val; struct soc_mixer_control *mc = (struct soc_mixer_control *) w->kcontrols[i].private_value; unsigned int reg = mc->reg; unsigned int shift = mc->shift; int max = mc->max; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; val = snd_soc_read(w->codec, reg); val = (val >> shift) & mask; if ((invert && !val) || (!invert && val)) p->connect = 1; else p->connect = 0; } break; case snd_soc_dapm_mux: { struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value; int val, item, bitmask; for (bitmask = 1; bitmask < e->max; bitmask <<= 1) ; val = snd_soc_read(w->codec, e->reg); item = (val >> e->shift_l) & (bitmask - 1); p->connect = 0; for (i = 0; i < e->max; i++) { if (!(strcmp(p->name, e->texts[i])) && item == i) p->connect = 1; } } break; case snd_soc_dapm_value_mux: { struct soc_enum *e = (struct soc_enum *) w->kcontrols[i].private_value; int val, item; val = snd_soc_read(w->codec, e->reg); val = (val >> e->shift_l) & e->mask; for (item = 0; item < e->max; item++) { if (val == e->values[item]) break; } p->connect = 0; for (i = 0; i < e->max; i++) { if (!(strcmp(p->name, e->texts[i])) && item == i) p->connect = 1; } } break; /* does not effect routing - always connected */ case snd_soc_dapm_pga: case snd_soc_dapm_output: case snd_soc_dapm_adc: case snd_soc_dapm_input: case snd_soc_dapm_dac: case snd_soc_dapm_micbias: case snd_soc_dapm_vmid: case snd_soc_dapm_supply: case snd_soc_dapm_aif_in: case snd_soc_dapm_aif_out: p->connect = 1; break; /* does effect routing - dynamically connected */ case snd_soc_dapm_hp: case snd_soc_dapm_mic: case snd_soc_dapm_spk: case snd_soc_dapm_line: case snd_soc_dapm_pre: case snd_soc_dapm_post: p->connect = 0; break; } } /* connect mux widget to its interconnecting audio paths */ static int dapm_connect_mux(struct snd_soc_codec *codec, struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest, struct snd_soc_dapm_path *path, const char *control_name, const struct snd_kcontrol_new *kcontrol) { struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; int i; for (i = 0; i < e->max; i++) { if (!(strcmp(control_name, e->texts[i]))) { list_add(&path->list, &codec->dapm_paths); list_add(&path->list_sink, &dest->sources); list_add(&path->list_source, &src->sinks); path->name = (char*)e->texts[i]; dapm_set_path_status(dest, path, 0); return 0; } } return -ENODEV; } /* connect mixer widget to its interconnecting audio paths */ static int dapm_connect_mixer(struct snd_soc_codec *codec, struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest, struct snd_soc_dapm_path *path, const char *control_name) { int i; /* search for mixer kcontrol */ for (i = 0; i < dest->num_kcontrols; i++) { if (!strcmp(control_name, dest->kcontrols[i].name)) { list_add(&path->list, &codec->dapm_paths); list_add(&path->list_sink, &dest->sources); list_add(&path->list_source, &src->sinks); path->name = dest->kcontrols[i].name; dapm_set_path_status(dest, path, i); return 0; } } return -ENODEV; } /* update dapm codec register bits */ static int dapm_update_bits(struct snd_soc_dapm_widget *widget) { int change, power; unsigned int old, new; struct snd_soc_codec *codec = widget->codec; /* check for valid widgets */ if (widget->reg < 0 || widget->id == snd_soc_dapm_input || widget->id == snd_soc_dapm_output || widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line || widget->id == snd_soc_dapm_spk) return 0; power = widget->power; if (widget->invert) power = (power ? 0:1); old = snd_soc_read(codec, widget->reg); new = (old & ~(0x1 << widget->shift)) | (power << widget->shift); change = old != new; if (change) { pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n", widget->name, widget->power ? "on" : "off", codec->pop_time); snd_soc_write(codec, widget->reg, new); pop_wait(codec->pop_time); } pr_debug("reg %x old %x new %x change %d\n", widget->reg, old, new, change); return change; } /* ramps the volume up or down to minimise pops before or after a * DAPM power event */ static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power) { const struct snd_kcontrol_new *k = widget->kcontrols; if (widget->muted && !power) return 0; if (!widget->muted && power) return 0; if (widget->num_kcontrols && k) { struct soc_mixer_control *mc = (struct soc_mixer_control *)k->private_value; unsigned int reg = mc->reg; unsigned int shift = mc->shift; int max = mc->max; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; if (power) { int i; /* power up has happended, increase volume to last level */ if (invert) { for (i = max; i > widget->saved_value; i--) snd_soc_update_bits(widget->codec, reg, mask, i); } else { for (i = 0; i < widget->saved_value; i++) snd_soc_update_bits(widget->codec, reg, mask, i); } widget->muted = 0; } else { /* power down is about to occur, decrease volume to mute */ int val = snd_soc_read(widget->codec, reg); int i = widget->saved_value = (val >> shift) & mask; if (invert) { for (; i < mask; i++) snd_soc_update_bits(widget->codec, reg, mask, i); } else { for (; i > 0; i--) snd_soc_update_bits(widget->codec, reg, mask, i); } widget->muted = 1; } } return 0; } /* create new dapm mixer control */ static int dapm_new_mixer(struct snd_soc_codec *codec, struct snd_soc_dapm_widget *w) { int i, ret = 0; size_t name_len; struct snd_soc_dapm_path *path; /* add kcontrol */ for (i = 0; i < w->num_kcontrols; i++) { /* match name */ list_for_each_entry(path, &w->sources, list_sink) { /* mixer/mux paths name must match control name */ if (path->name != (char*)w->kcontrols[i].name) continue; /* add dapm control with long name. * for dapm_mixer this is the concatenation of the * mixer and kcontrol name. * for dapm_mixer_named_ctl this is simply the * kcontrol name. */ name_len = strlen(w->kcontrols[i].name) + 1; if (w->id != snd_soc_dapm_mixer_named_ctl) name_len += 1 + strlen(w->name); path->long_name = kmalloc(name_len, GFP_KERNEL); if (path->long_name == NULL) return -ENOMEM; switch (w->id) { default: snprintf(path->long_name, name_len, "%s %s", w->name, w->kcontrols[i].name); break; case snd_soc_dapm_mixer_named_ctl: snprintf(path->long_name, name_len, "%s", w->kcontrols[i].name); break; } path->long_name[name_len - 1] = '\0'; path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w, path->long_name); ret = snd_ctl_add(codec->card, path->kcontrol); if (ret < 0) { printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n", path->long_name, ret); kfree(path->long_name); path->long_name = NULL; return ret; } } } return ret; } /* create new dapm mux control */ static int dapm_new_mux(struct snd_soc_codec *codec, struct snd_soc_dapm_widget *w) { struct snd_soc_dapm_path *path = NULL; struct snd_kcontrol *kcontrol; int ret = 0; if (!w->num_kcontrols) { printk(KERN_ERR "asoc: mux %s has no controls\n", w->name); return -EINVAL; } kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name); ret = snd_ctl_add(codec->card, kcontrol); if (ret < 0) goto err; list_for_each_entry(path, &w->sources, list_sink) path->kcontrol = kcontrol; return ret; err: printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name); return ret; } /* create new dapm volume control */ static int dapm_new_pga(struct snd_soc_codec *codec, struct snd_soc_dapm_widget *w) { struct snd_kcontrol *kcontrol; int ret = 0; if (!w->num_kcontrols) return -EINVAL; kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name); ret = snd_ctl_add(codec->card, kcontrol); if (ret < 0) { printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name); return ret; } return ret; } /* reset 'walked' bit for each dapm path */ static inline void dapm_clear_walk(struct snd_soc_codec *codec) { struct snd_soc_dapm_path *p; list_for_each_entry(p, &codec->dapm_paths, list) p->walked = 0; } /* * Recursively check for a completed path to an active or physically connected * output widget. Returns number of complete paths. */ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget) { struct snd_soc_dapm_path *path; int con = 0; if (widget->id == snd_soc_dapm_supply) return 0; switch (widget->id) { case snd_soc_dapm_adc: case snd_soc_dapm_aif_out: if (widget->active) return 1; default: break; } if (widget->connected) { /* connected pin ? */ if (widget->id == snd_soc_dapm_output && !widget->ext) return 1; /* connected jack or spk ? */ if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk || (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources))) return 1; } list_for_each_entry(path, &widget->sinks, list_source) { if (path->walked) continue; if (path->sink && path->connect) { path->walked = 1; con += is_connected_output_ep(path->sink); } } return con; } /* * Recursively check for a completed path to an active or physically connected * input widget. Returns number of complete paths. */ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget) { struct snd_soc_dapm_path *path; int con = 0; if (widget->id == snd_soc_dapm_supply) return 0; /* active stream ? */ switch (widget->id) { case snd_soc_dapm_dac: case snd_soc_dapm_aif_in: if (widget->active) return 1; default: break; } if (widget->connected) { /* connected pin ? */ if (widget->id == snd_soc_dapm_input && !widget->ext) return 1; /* connected VMID/Bias for lower pops */ if (widget->id == snd_soc_dapm_vmid) return 1; /* connected jack ? */ if (widget->id == snd_soc_dapm_mic || (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks))) return 1; } list_for_each_entry(path, &widget->sources, list_sink) { if (path->walked) continue; if (path->source && path->connect) { path->walked = 1; con += is_connected_input_ep(path->source); } } return con; } /* * Handler for generic register modifier widget. */ int dapm_reg_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { unsigned int val; if (SND_SOC_DAPM_EVENT_ON(event)) val = w->on_val; else val = w->off_val; snd_soc_update_bits(w->codec, -(w->reg + 1), w->mask << w->shift, val << w->shift); return 0; } EXPORT_SYMBOL_GPL(dapm_reg_event); /* Standard power change method, used to apply power changes to most * widgets. */ static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w) { int ret; /* call any power change event handlers */ if (w->event) pr_debug("power %s event for %s flags %x\n", w->power ? "on" : "off", w->name, w->event_flags); /* power up pre event */ if (w->power && w->event && (w->event_flags & SND_SOC_DAPM_PRE_PMU)) { ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU); if (ret < 0) return ret; } /* power down pre event */ if (!w->power && w->event && (w->event_flags & SND_SOC_DAPM_PRE_PMD)) { ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD); if (ret < 0) return ret; } /* Lower PGA volume to reduce pops */ if (w->id == snd_soc_dapm_pga && !w->power) dapm_set_pga(w, w->power); dapm_update_bits(w); /* Raise PGA volume to reduce pops */ if (w->id == snd_soc_dapm_pga && w->power) dapm_set_pga(w, w->power); /* power up post event */ if (w->power && w->event && (w->event_flags & SND_SOC_DAPM_POST_PMU)) { ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMU); if (ret < 0) return ret; } /* power down post event */ if (!w->power && w->event && (w->event_flags & SND_SOC_DAPM_POST_PMD)) { ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD); if (ret < 0) return ret; } return 0; } /* Generic check to see if a widget should be powered. */ static int dapm_generic_check_power(struct snd_soc_dapm_widget *w) { int in, out; in = is_connected_input_ep(w); dapm_clear_walk(w->codec); out = is_connected_output_ep(w); dapm_clear_walk(w->codec); return out != 0 && in != 0; } /* Check to see if an ADC has power */ static int dapm_adc_check_power(struct snd_soc_dapm_widget *w) { int in; if (w->active) { in = is_connected_input_ep(w); dapm_clear_walk(w->codec); return in != 0; } else { return dapm_generic_check_power(w); } } /* Check to see if a DAC has power */ static int dapm_dac_check_power(struct snd_soc_dapm_widget *w) { int out; if (w->active) { out = is_connected_output_ep(w); dapm_clear_walk(w->codec); return out != 0; } else { return dapm_generic_check_power(w); } } /* Check to see if a power supply is needed */ static int dapm_supply_check_power(struct snd_soc_dapm_widget *w) { struct snd_soc_dapm_path *path; int power = 0; /* Check if one of our outputs is connected */ list_for_each_entry(path, &w->sinks, list_source) { if (path->connected && !path->connected(path->source, path->sink)) continue; if (path->sink && path->sink->power_check && path->sink->power_check(path->sink)) { power = 1; break; } } dapm_clear_walk(w->codec); return power; } static int dapm_seq_compare(struct snd_soc_dapm_widget *a, struct snd_soc_dapm_widget *b, int sort[]) { if (a->codec != b->codec) return (unsigned long)a - (unsigned long)b; if (sort[a->id] != sort[b->id]) return sort[a->id] - sort[b->id]; if (a->reg != b->reg) return a->reg - b->reg; return 0; } /* Insert a widget in order into a DAPM power sequence. */ static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget, struct list_head *list, int sort[]) { struct snd_soc_dapm_widget *w; list_for_each_entry(w, list, power_list) if (dapm_seq_compare(new_widget, w, sort) < 0) { list_add_tail(&new_widget->power_list, &w->power_list); return; } list_add_tail(&new_widget->power_list, list); } /* Apply the coalesced changes from a DAPM sequence */ static void dapm_seq_run_coalesced(struct snd_soc_codec *codec, struct list_head *pending) { struct snd_soc_dapm_widget *w; int reg, power, ret; unsigned int value = 0; unsigned int mask = 0; unsigned int cur_mask; reg = list_first_entry(pending, struct snd_soc_dapm_widget, power_list)->reg; list_for_each_entry(w, pending, power_list) { cur_mask = 1 << w->shift; BUG_ON(reg != w->reg); if (w->invert) power = !w->power; else power = w->power; mask |= cur_mask; if (power) value |= cur_mask; pop_dbg(codec->pop_time, "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n", w->name, reg, value, mask); /* power up pre event */ if (w->power && w->event && (w->event_flags & SND_SOC_DAPM_PRE_PMU)) { pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n", w->name); ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU); if (ret < 0) pr_err("%s: pre event failed: %d\n", w->name, ret); } /* power down pre event */ if (!w->power && w->event && (w->event_flags & SND_SOC_DAPM_PRE_PMD)) { pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n", w->name); ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD); if (ret < 0) pr_err("%s: pre event failed: %d\n", w->name, ret); } /* Lower PGA volume to reduce pops */ if (w->id == snd_soc_dapm_pga && !w->power) dapm_set_pga(w, w->power); } if (reg >= 0) { pop_dbg(codec->pop_time, "pop test : Applying 0x%x/0x%x to %x in %dms\n", value, mask, reg, codec->pop_time); pop_wait(codec->pop_time); snd_soc_update_bits(codec, reg, mask, value); } list_for_each_entry(w, pending, power_list) { /* Raise PGA volume to reduce pops */ if (w->id == snd_soc_dapm_pga && w->power) dapm_set_pga(w, w->power); /* power up post event */ if (w->power && w->event && (w->event_flags & SND_SOC_DAPM_POST_PMU)) { pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n", w->name); ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMU); if (ret < 0) pr_err("%s: post event failed: %d\n", w->name, ret); } /* power down post event */ if (!w->power && w->event && (w->event_flags & SND_SOC_DAPM_POST_PMD)) { pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n", w->name); ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD); if (ret < 0) pr_err("%s: post event failed: %d\n", w->name, ret); } } } /* Apply a DAPM power sequence. * * We walk over a pre-sorted list of widgets to apply power to. In * order to minimise the number of writes to the device required * multiple widgets will be updated in a single write where possible. * Currently anything that requires more than a single write is not * handled. */ static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list, int event, int sort[]) { struct snd_soc_dapm_widget *w, *n; LIST_HEAD(pending); int cur_sort = -1; int cur_reg = SND_SOC_NOPM; int ret; list_for_each_entry_safe(w, n, list, power_list) { ret = 0; /* Do we need to apply any queued changes? */ if (sort[w->id] != cur_sort || w->reg != cur_reg) { if (!list_empty(&pending)) dapm_seq_run_coalesced(codec, &pending); INIT_LIST_HEAD(&pending); cur_sort = -1; cur_reg = SND_SOC_NOPM; } switch (w->id) { case snd_soc_dapm_pre: if (!w->event) list_for_each_entry_safe_continue(w, n, list, power_list); if (event == SND_SOC_DAPM_STREAM_START) ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU); else if (event == SND_SOC_DAPM_STREAM_STOP) ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD); break; case snd_soc_dapm_post: if (!w->event) list_for_each_entry_safe_continue(w, n, list, power_list); if (event == SND_SOC_DAPM_STREAM_START) ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMU); else if (event == SND_SOC_DAPM_STREAM_STOP) ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD); break; case snd_soc_dapm_input: case snd_soc_dapm_output: case snd_soc_dapm_hp: case snd_soc_dapm_mic: case snd_soc_dapm_line: case snd_soc_dapm_spk: /* No register support currently */ ret = dapm_generic_apply_power(w); break; default: /* Queue it up for application */ cur_sort = sort[w->id]; cur_reg = w->reg; list_move(&w->power_list, &pending); break; } if (ret < 0) pr_err("Failed to apply widget power: %d\n", ret); } if (!list_empty(&pending)) dapm_seq_run_coalesced(codec, &pending); } /* * Scan each dapm widget for complete audio path. * A complete path is a route that has valid endpoints i.e.:- * * o DAC to output pin. * o Input Pin to ADC. * o Input pin to Output pin (bypass, sidetone) * o DAC to ADC (loopback). */ static int dapm_power_widgets(struct snd_soc_codec *codec, int event) { struct snd_soc_device *socdev = codec->socdev; struct snd_soc_dapm_widget *w; LIST_HEAD(up_list); LIST_HEAD(down_list); int ret = 0; int power; int sys_power = 0; /* Check which widgets we need to power and store them in * lists indicating if they should be powered up or down. */ list_for_each_entry(w, &codec->dapm_widgets, list) { switch (w->id) { case snd_soc_dapm_pre: dapm_seq_insert(w, &down_list, dapm_down_seq); break; case snd_soc_dapm_post: dapm_seq_insert(w, &up_list, dapm_up_seq); break; default: if (!w->power_check) continue; /* If we're suspending then pull down all the * power. */ switch (event) { case SND_SOC_DAPM_STREAM_SUSPEND: power = 0; break; default: power = w->power_check(w); if (power) sys_power = 1; break; } if (w->power == power) continue; if (power) dapm_seq_insert(w, &up_list, dapm_up_seq); else dapm_seq_insert(w, &down_list, dapm_down_seq); w->power = power; break; } } /* If there are no DAPM widgets then try to figure out power from the * event type. */ if (list_empty(&codec->dapm_widgets)) { switch (event) { case SND_SOC_DAPM_STREAM_START: case SND_SOC_DAPM_STREAM_RESUME: sys_power = 1; break; case SND_SOC_DAPM_STREAM_SUSPEND: sys_power = 0; break; case SND_SOC_DAPM_STREAM_NOP: switch (codec->bias_level) { case SND_SOC_BIAS_STANDBY: case SND_SOC_BIAS_OFF: sys_power = 0; break; default: sys_power = 1; break; } break; default: break; } } if (sys_power && codec->bias_level == SND_SOC_BIAS_OFF) { ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY); if (ret != 0) pr_err("Failed to turn on bias: %d\n", ret); } /* If we're changing to all on or all off then prepare */ if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) || (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) { ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE); if (ret != 0) pr_err("Failed to prepare bias: %d\n", ret); } /* Power down widgets first; try to avoid amplifying pops. */ dapm_seq_run(codec, &down_list, event, dapm_down_seq); /* Now power up. */ dapm_seq_run(codec, &up_list, event, dapm_up_seq); /* If we just powered the last thing off drop to standby bias */ if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) { ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY); if (ret != 0) pr_err("Failed to apply standby bias: %d\n", ret); } /* If we're in standby and can support bias off then do that */ if (codec->bias_level == SND_SOC_BIAS_STANDBY && codec->idle_bias_off) { ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF); if (ret != 0) pr_err("Failed to turn off bias: %d\n", ret); } /* If we just powered up then move to active bias */ if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) { ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_ON); if (ret != 0) pr_err("Failed to apply active bias: %d\n", ret); } pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n", codec->pop_time); return 0; } #ifdef CONFIG_DEBUG_FS static int dapm_widget_power_open_file(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } static ssize_t dapm_widget_power_read_file(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct snd_soc_dapm_widget *w = file->private_data; char *buf; int in, out; ssize_t ret; struct snd_soc_dapm_path *p = NULL; buf = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!buf) return -ENOMEM; in = is_connected_input_ep(w); dapm_clear_walk(w->codec); out = is_connected_output_ep(w); dapm_clear_walk(w->codec); ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d", w->name, w->power ? "On" : "Off", in, out); if (w->reg >= 0) ret += snprintf(buf + ret, PAGE_SIZE - ret, " - R%d(0x%x) bit %d", w->reg, w->reg, w->shift); ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n"); if (w->sname) ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n", w->sname, w->active ? "active" : "inactive"); list_for_each_entry(p, &w->sources, list_sink) { if (p->connected && !p->connected(w, p->sink)) continue; if (p->connect) ret += snprintf(buf + ret, PAGE_SIZE - ret, " in %s %s\n", p->name ? p->name : "static", p->source->name); } list_for_each_entry(p, &w->sinks, list_source) { if (p->connected && !p->connected(w, p->sink)) continue; if (p->connect) ret += snprintf(buf + ret, PAGE_SIZE - ret, " out %s %s\n", p->name ? p->name : "static", p->sink->name); } ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); kfree(buf); return ret; } static const struct file_operations dapm_widget_power_fops = { .open = dapm_widget_power_open_file, .read = dapm_widget_power_read_file, }; void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec) { struct snd_soc_dapm_widget *w; struct dentry *d; if (!codec->debugfs_dapm) return; list_for_each_entry(w, &codec->dapm_widgets, list) { if (!w->name) continue; d = debugfs_create_file(w->name, 0444, codec->debugfs_dapm, w, &dapm_widget_power_fops); if (!d) printk(KERN_WARNING "ASoC: Failed to create %s debugfs file\n", w->name); } } #else void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec) { } #endif /* test and update the power status of a mux widget */ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget, struct snd_kcontrol *kcontrol, int change, int mux, struct soc_enum *e) { struct snd_soc_dapm_path *path; int found = 0; if (widget->id != snd_soc_dapm_mux && widget->id != snd_soc_dapm_value_mux) return -ENODEV; if (!change) return 0; /* find dapm widget path assoc with kcontrol */ list_for_each_entry(path, &widget->codec->dapm_paths, list) { if (path->kcontrol != kcontrol) continue; if (!path->name || !e->texts[mux]) continue; found = 1; /* we now need to match the string in the enum to the path */ if (!(strcmp(path->name, e->texts[mux]))) path->connect = 1; /* new connection */ else path->connect = 0; /* old connection must be powered down */ } if (found) dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP); return 0; } /* test and update the power status of a mixer or switch widget */ static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget, struct snd_kcontrol *kcontrol, int connect) { struct snd_soc_dapm_path *path; int found = 0; if (widget->id != snd_soc_dapm_mixer && widget->id != snd_soc_dapm_mixer_named_ctl && widget->id != snd_soc_dapm_switch) return -ENODEV; /* find dapm widget path assoc with kcontrol */ list_for_each_entry(path, &widget->codec->dapm_paths, list) { if (path->kcontrol != kcontrol) continue; /* found, now check type */ found = 1; path->connect = connect; break; } if (found) dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP); return 0; } /* show dapm widget status in sys fs */ static ssize_t dapm_widget_show(struct device *dev, struct device_attribute *attr, char *buf) { struct snd_soc_device *devdata = dev_get_drvdata(dev); struct snd_soc_codec *codec = devdata->card->codec; struct snd_soc_dapm_widget *w; int count = 0; char *state = "not set"; list_for_each_entry(w, &codec->dapm_widgets, list) { /* only display widgets that burnm power */ switch (w->id) { case snd_soc_dapm_hp: case snd_soc_dapm_mic: case snd_soc_dapm_spk: case snd_soc_dapm_line: case snd_soc_dapm_micbias: case snd_soc_dapm_dac: case snd_soc_dapm_adc: case snd_soc_dapm_pga: case snd_soc_dapm_mixer: case snd_soc_dapm_mixer_named_ctl: case snd_soc_dapm_supply: if (w->name) count += sprintf(buf + count, "%s: %s\n", w->name, w->power ? "On":"Off"); break; default: break; } } switch (codec->bias_level) { case SND_SOC_BIAS_ON: state = "On"; break; case SND_SOC_BIAS_PREPARE: state = "Prepare"; break; case SND_SOC_BIAS_STANDBY: state = "Standby"; break; case SND_SOC_BIAS_OFF: state = "Off"; break; } count += sprintf(buf + count, "PM State: %s\n", state); return count; } static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL); int snd_soc_dapm_sys_add(struct device *dev) { return device_create_file(dev, &dev_attr_dapm_widget); } static void snd_soc_dapm_sys_remove(struct device *dev) { device_remove_file(dev, &dev_attr_dapm_widget); } /* free all dapm widgets and resources */ static void dapm_free_widgets(struct snd_soc_codec *codec) { struct snd_soc_dapm_widget *w, *next_w; struct snd_soc_dapm_path *p, *next_p; list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) { list_del(&w->list); kfree(w); } list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) { list_del(&p->list); kfree(p->long_name); kfree(p); } } static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec, const char *pin, int status) { struct snd_soc_dapm_widget *w; list_for_each_entry(w, &codec->dapm_widgets, list) { if (!strcmp(w->name, pin)) { pr_debug("dapm: %s: pin %s\n", codec->name, pin); w->connected = status; return 0; } } pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin); return -EINVAL; } /** * snd_soc_dapm_sync - scan and power dapm paths * @codec: audio codec * * Walks all dapm audio paths and powers widgets according to their * stream or path usage. * * Returns 0 for success. */ int snd_soc_dapm_sync(struct snd_soc_codec *codec) { return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP); } EXPORT_SYMBOL_GPL(snd_soc_dapm_sync); static int snd_soc_dapm_add_route(struct snd_soc_codec *codec, const struct snd_soc_dapm_route *route) { struct snd_soc_dapm_path *path; struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w; const char *sink = route->sink; const char *control = route->control; const char *source = route->source; int ret = 0; /* find src and dest widgets */ list_for_each_entry(w, &codec->dapm_widgets, list) { if (!wsink && !(strcmp(w->name, sink))) { wsink = w; continue; } if (!wsource && !(strcmp(w->name, source))) { wsource = w; } } if (wsource == NULL || wsink == NULL) return -ENODEV; path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL); if (!path) return -ENOMEM; path->source = wsource; path->sink = wsink; path->connected = route->connected; INIT_LIST_HEAD(&path->list); INIT_LIST_HEAD(&path->list_source); INIT_LIST_HEAD(&path->list_sink); /* check for external widgets */ if (wsink->id == snd_soc_dapm_input) { if (wsource->id == snd_soc_dapm_micbias || wsource->id == snd_soc_dapm_mic || wsource->id == snd_soc_dapm_line || wsource->id == snd_soc_dapm_output) wsink->ext = 1; } if (wsource->id == snd_soc_dapm_output) { if (wsink->id == snd_soc_dapm_spk || wsink->id == snd_soc_dapm_hp || wsink->id == snd_soc_dapm_line || wsink->id == snd_soc_dapm_input) wsource->ext = 1; } /* connect static paths */ if (control == NULL) { list_add(&path->list, &codec->dapm_paths); list_add(&path->list_sink, &wsink->sources); list_add(&path->list_source, &wsource->sinks); path->connect = 1; return 0; } /* connect dynamic paths */ switch(wsink->id) { case snd_soc_dapm_adc: case snd_soc_dapm_dac: case snd_soc_dapm_pga: case snd_soc_dapm_input: case snd_soc_dapm_output: case snd_soc_dapm_micbias: case snd_soc_dapm_vmid: case snd_soc_dapm_pre: case snd_soc_dapm_post: case snd_soc_dapm_supply: case snd_soc_dapm_aif_in: case snd_soc_dapm_aif_out: list_add(&path->list, &codec->dapm_paths); list_add(&path->list_sink, &wsink->sources); list_add(&path->list_source, &wsource->sinks); path->connect = 1; return 0; case snd_soc_dapm_mux: case snd_soc_dapm_value_mux: ret = dapm_connect_mux(codec, wsource, wsink, path, control, &wsink->kcontrols[0]); if (ret != 0) goto err; break; case snd_soc_dapm_switch: case snd_soc_dapm_mixer: case snd_soc_dapm_mixer_named_ctl: ret = dapm_connect_mixer(codec, wsource, wsink, path, control); if (ret != 0) goto err; break; case snd_soc_dapm_hp: case snd_soc_dapm_mic: case snd_soc_dapm_line: case snd_soc_dapm_spk: list_add(&path->list, &codec->dapm_paths); list_add(&path->list_sink, &wsink->sources); list_add(&path->list_source, &wsource->sinks); path->connect = 0; return 0; } return 0; err: printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source, control, sink); kfree(path); return ret; } /** * snd_soc_dapm_add_routes - Add routes between DAPM widgets * @codec: codec * @route: audio routes * @num: number of routes * * Connects 2 dapm widgets together via a named audio path. The sink is * the widget receiving the audio signal, whilst the source is the sender * of the audio signal. * * Returns 0 for success else error. On error all resources can be freed * with a call to snd_soc_card_free(). */ int snd_soc_dapm_add_routes(struct snd_soc_codec *codec, const struct snd_soc_dapm_route *route, int num) { int i, ret; for (i = 0; i < num; i++) { ret = snd_soc_dapm_add_route(codec, route); if (ret < 0) { printk(KERN_ERR "Failed to add route %s->%s\n", route->source, route->sink); return ret; } route++; } return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes); /** * snd_soc_dapm_new_widgets - add new dapm widgets * @codec: audio codec * * Checks the codec for any new dapm widgets and creates them if found. * * Returns 0 for success. */ int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec) { struct snd_soc_dapm_widget *w; list_for_each_entry(w, &codec->dapm_widgets, list) { if (w->new) continue; switch(w->id) { case snd_soc_dapm_switch: case snd_soc_dapm_mixer: case snd_soc_dapm_mixer_named_ctl: w->power_check = dapm_generic_check_power; dapm_new_mixer(codec, w); break; case snd_soc_dapm_mux: case snd_soc_dapm_value_mux: w->power_check = dapm_generic_check_power; dapm_new_mux(codec, w); break; case snd_soc_dapm_adc: case snd_soc_dapm_aif_out: w->power_check = dapm_adc_check_power; break; case snd_soc_dapm_dac: case snd_soc_dapm_aif_in: w->power_check = dapm_dac_check_power; break; case snd_soc_dapm_pga: w->power_check = dapm_generic_check_power; dapm_new_pga(codec, w); break; case snd_soc_dapm_input: case snd_soc_dapm_output: case snd_soc_dapm_micbias: case snd_soc_dapm_spk: case snd_soc_dapm_hp: case snd_soc_dapm_mic: case snd_soc_dapm_line: w->power_check = dapm_generic_check_power; break; case snd_soc_dapm_supply: w->power_check = dapm_supply_check_power; case snd_soc_dapm_vmid: case snd_soc_dapm_pre: case snd_soc_dapm_post: break; } w->new = 1; } dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP); return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets); /** * snd_soc_dapm_get_volsw - dapm mixer get callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to get the value of a dapm mixer control. * * Returns 0 for success. */ int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; unsigned int reg = mc->reg; unsigned int shift = mc->shift; unsigned int rshift = mc->rshift; int max = mc->max; unsigned int invert = mc->invert; unsigned int mask = (1 << fls(max)) - 1; /* return the saved value if we are powered down */ if (widget->id == snd_soc_dapm_pga && !widget->power) { ucontrol->value.integer.value[0] = widget->saved_value; return 0; } ucontrol->value.integer.value[0] = (snd_soc_read(widget->codec, reg) >> shift) & mask; if (shift != rshift) ucontrol->value.integer.value[1] = (snd_soc_read(widget->codec, reg) >> rshift) & mask; if (invert) { ucontrol->value.integer.value[0] = max - ucontrol->value.integer.value[0]; if (shift != rshift) ucontrol->value.integer.value[1] = max - ucontrol->value.integer.value[1]; } return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw); /** * snd_soc_dapm_put_volsw - dapm mixer set callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to set the value of a dapm mixer control. * * Returns 0 for success. */ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; unsigned int reg = mc->reg; unsigned int shift = mc->shift; unsigned int rshift = mc->rshift; int max = mc->max; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; unsigned int val, val2, val_mask; int connect; int ret; val = (ucontrol->value.integer.value[0] & mask); if (invert) val = max - val; val_mask = mask << shift; val = val << shift; if (shift != rshift) { val2 = (ucontrol->value.integer.value[1] & mask); if (invert) val2 = max - val2; val_mask |= mask << rshift; val |= val2 << rshift; } mutex_lock(&widget->codec->mutex); widget->value = val; /* save volume value if the widget is powered down */ if (widget->id == snd_soc_dapm_pga && !widget->power) { widget->saved_value = val; mutex_unlock(&widget->codec->mutex); return 1; } if (snd_soc_test_bits(widget->codec, reg, val_mask, val)) { if (val) /* new connection */ connect = invert ? 0:1; else /* old connection must be powered down */ connect = invert ? 1:0; dapm_mixer_update_power(widget, kcontrol, connect); } if (widget->event) { if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { ret = widget->event(widget, kcontrol, SND_SOC_DAPM_PRE_REG); if (ret < 0) { ret = 1; goto out; } } ret = snd_soc_update_bits(widget->codec, reg, val_mask, val); if (widget->event_flags & SND_SOC_DAPM_POST_REG) ret = widget->event(widget, kcontrol, SND_SOC_DAPM_POST_REG); } else ret = snd_soc_update_bits(widget->codec, reg, val_mask, val); out: mutex_unlock(&widget->codec->mutex); return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw); /** * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to get the value of a dapm enumerated double mixer control. * * Returns 0 for success. */ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int val, bitmask; for (bitmask = 1; bitmask < e->max; bitmask <<= 1) ; val = snd_soc_read(widget->codec, e->reg); ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1); if (e->shift_l != e->shift_r) ucontrol->value.enumerated.item[1] = (val >> e->shift_r) & (bitmask - 1); return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double); /** * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to set the value of a dapm enumerated double mixer control. * * Returns 0 for success. */ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int val, mux, change; unsigned int mask, bitmask; int ret = 0; for (bitmask = 1; bitmask < e->max; bitmask <<= 1) ; if (ucontrol->value.enumerated.item[0] > e->max - 1) return -EINVAL; mux = ucontrol->value.enumerated.item[0]; val = mux << e->shift_l; mask = (bitmask - 1) << e->shift_l; if (e->shift_l != e->shift_r) { if (ucontrol->value.enumerated.item[1] > e->max - 1) return -EINVAL; val |= ucontrol->value.enumerated.item[1] << e->shift_r; mask |= (bitmask - 1) << e->shift_r; } mutex_lock(&widget->codec->mutex); widget->value = val; change = snd_soc_test_bits(widget->codec, e->reg, mask, val); dapm_mux_update_power(widget, kcontrol, change, mux, e); if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { ret = widget->event(widget, kcontrol, SND_SOC_DAPM_PRE_REG); if (ret < 0) goto out; } ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); if (widget->event_flags & SND_SOC_DAPM_POST_REG) ret = widget->event(widget, kcontrol, SND_SOC_DAPM_POST_REG); out: mutex_unlock(&widget->codec->mutex); return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double); /** * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux * @kcontrol: mixer control * @ucontrol: control element information * * Returns 0 for success. */ int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); ucontrol->value.enumerated.item[0] = widget->value; return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt); /** * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux * @kcontrol: mixer control * @ucontrol: control element information * * Returns 0 for success. */ int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; int change; int ret = 0; if (ucontrol->value.enumerated.item[0] >= e->max) return -EINVAL; mutex_lock(&widget->codec->mutex); change = widget->value != ucontrol->value.enumerated.item[0]; widget->value = ucontrol->value.enumerated.item[0]; dapm_mux_update_power(widget, kcontrol, change, widget->value, e); mutex_unlock(&widget->codec->mutex); return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt); /** * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get * callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to get the value of a dapm semi enumerated double mixer control. * * Semi enumerated mixer: the enumerated items are referred as values. Can be * used for handling bitfield coded enumeration for example. * * Returns 0 for success. */ int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int reg_val, val, mux; reg_val = snd_soc_read(widget->codec, e->reg); val = (reg_val >> e->shift_l) & e->mask; for (mux = 0; mux < e->max; mux++) { if (val == e->values[mux]) break; } ucontrol->value.enumerated.item[0] = mux; if (e->shift_l != e->shift_r) { val = (reg_val >> e->shift_r) & e->mask; for (mux = 0; mux < e->max; mux++) { if (val == e->values[mux]) break; } ucontrol->value.enumerated.item[1] = mux; } return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double); /** * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set * callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to set the value of a dapm semi enumerated double mixer control. * * Semi enumerated mixer: the enumerated items are referred as values. Can be * used for handling bitfield coded enumeration for example. * * Returns 0 for success. */ int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int val, mux, change; unsigned int mask; int ret = 0; if (ucontrol->value.enumerated.item[0] > e->max - 1) return -EINVAL; mux = ucontrol->value.enumerated.item[0]; val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l; mask = e->mask << e->shift_l; if (e->shift_l != e->shift_r) { if (ucontrol->value.enumerated.item[1] > e->max - 1) return -EINVAL; val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r; mask |= e->mask << e->shift_r; } mutex_lock(&widget->codec->mutex); widget->value = val; change = snd_soc_test_bits(widget->codec, e->reg, mask, val); dapm_mux_update_power(widget, kcontrol, change, mux, e); if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { ret = widget->event(widget, kcontrol, SND_SOC_DAPM_PRE_REG); if (ret < 0) goto out; } ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); if (widget->event_flags & SND_SOC_DAPM_POST_REG) ret = widget->event(widget, kcontrol, SND_SOC_DAPM_POST_REG); out: mutex_unlock(&widget->codec->mutex); return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double); /** * snd_soc_dapm_info_pin_switch - Info for a pin switch * * @kcontrol: mixer control * @uinfo: control element information * * Callback to provide information about a pin switch control. */ int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; uinfo->count = 1; uinfo->value.integer.min = 0; uinfo->value.integer.max = 1; return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch); /** * snd_soc_dapm_get_pin_switch - Get information for a pin switch * * @kcontrol: mixer control * @ucontrol: Value */ int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); const char *pin = (const char *)kcontrol->private_value; mutex_lock(&codec->mutex); ucontrol->value.integer.value[0] = snd_soc_dapm_get_pin_status(codec, pin); mutex_unlock(&codec->mutex); return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch); /** * snd_soc_dapm_put_pin_switch - Set information for a pin switch * * @kcontrol: mixer control * @ucontrol: Value */ int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); const char *pin = (const char *)kcontrol->private_value; mutex_lock(&codec->mutex); if (ucontrol->value.integer.value[0]) snd_soc_dapm_enable_pin(codec, pin); else snd_soc_dapm_disable_pin(codec, pin); snd_soc_dapm_sync(codec); mutex_unlock(&codec->mutex); return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch); /** * snd_soc_dapm_new_control - create new dapm control * @codec: audio codec * @widget: widget template * * Creates a new dapm control based upon the template. * * Returns 0 for success else error. */ int snd_soc_dapm_new_control(struct snd_soc_codec *codec, const struct snd_soc_dapm_widget *widget) { struct snd_soc_dapm_widget *w; if ((w = dapm_cnew_widget(widget)) == NULL) return -ENOMEM; w->codec = codec; INIT_LIST_HEAD(&w->sources); INIT_LIST_HEAD(&w->sinks); INIT_LIST_HEAD(&w->list); list_add(&w->list, &codec->dapm_widgets); /* machine layer set ups unconnected pins and insertions */ w->connected = 1; return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control); /** * snd_soc_dapm_new_controls - create new dapm controls * @codec: audio codec * @widget: widget array * @num: number of widgets * * Creates new DAPM controls based upon the templates. * * Returns 0 for success else error. */ int snd_soc_dapm_new_controls(struct snd_soc_codec *codec, const struct snd_soc_dapm_widget *widget, int num) { int i, ret; for (i = 0; i < num; i++) { ret = snd_soc_dapm_new_control(codec, widget); if (ret < 0) { printk(KERN_ERR "ASoC: Failed to create DAPM control %s: %d\n", widget->name, ret); return ret; } widget++; } return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls); /** * snd_soc_dapm_stream_event - send a stream event to the dapm core * @codec: audio codec * @stream: stream name * @event: stream event * * Sends a stream event to the dapm core. The core then makes any * necessary widget power changes. * * Returns 0 for success else error. */ int snd_soc_dapm_stream_event(struct snd_soc_codec *codec, char *stream, int event) { struct snd_soc_dapm_widget *w; if (stream == NULL) return 0; mutex_lock(&codec->mutex); list_for_each_entry(w, &codec->dapm_widgets, list) { if (!w->sname) continue; pr_debug("widget %s\n %s stream %s event %d\n", w->name, w->sname, stream, event); if (strstr(w->sname, stream)) { switch(event) { case SND_SOC_DAPM_STREAM_START: w->active = 1; break; case SND_SOC_DAPM_STREAM_STOP: w->active = 0; break; case SND_SOC_DAPM_STREAM_SUSPEND: if (w->active) w->suspend = 1; w->active = 0; break; case SND_SOC_DAPM_STREAM_RESUME: if (w->suspend) { w->active = 1; w->suspend = 0; } break; case SND_SOC_DAPM_STREAM_PAUSE_PUSH: break; case SND_SOC_DAPM_STREAM_PAUSE_RELEASE: break; } } } dapm_power_widgets(codec, event); mutex_unlock(&codec->mutex); return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event); /** * snd_soc_dapm_enable_pin - enable pin. * @codec: SoC codec * @pin: pin name * * Enables input/output pin and its parents or children widgets iff there is * a valid audio route and active audio stream. * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to * do any widget power switching. */ int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin) { return snd_soc_dapm_set_pin(codec, pin, 1); } EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin); /** * snd_soc_dapm_disable_pin - disable pin. * @codec: SoC codec * @pin: pin name * * Disables input/output pin and its parents or children widgets. * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to * do any widget power switching. */ int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin) { return snd_soc_dapm_set_pin(codec, pin, 0); } EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin); /** * snd_soc_dapm_nc_pin - permanently disable pin. * @codec: SoC codec * @pin: pin name * * Marks the specified pin as being not connected, disabling it along * any parent or child widgets. At present this is identical to * snd_soc_dapm_disable_pin() but in future it will be extended to do * additional things such as disabling controls which only affect * paths through the pin. * * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to * do any widget power switching. */ int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin) { return snd_soc_dapm_set_pin(codec, pin, 0); } EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin); /** * snd_soc_dapm_get_pin_status - get audio pin status * @codec: audio codec * @pin: audio signal pin endpoint (or start point) * * Get audio pin status - connected or disconnected. * * Returns 1 for connected otherwise 0. */ int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin) { struct snd_soc_dapm_widget *w; list_for_each_entry(w, &codec->dapm_widgets, list) { if (!strcmp(w->name, pin)) return w->connected; } return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status); /** * snd_soc_dapm_free - free dapm resources * @socdev: SoC device * * Free all dapm widgets and resources. */ void snd_soc_dapm_free(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->card->codec; snd_soc_dapm_sys_remove(socdev->dev); dapm_free_widgets(codec); } EXPORT_SYMBOL_GPL(snd_soc_dapm_free); /* * snd_soc_dapm_shutdown - callback for system shutdown */ void snd_soc_dapm_shutdown(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->card->codec; struct snd_soc_dapm_widget *w; LIST_HEAD(down_list); int powerdown = 0; list_for_each_entry(w, &codec->dapm_widgets, list) { if (w->power) { dapm_seq_insert(w, &down_list, dapm_down_seq); w->power = 0; powerdown = 1; } } /* If there were no widgets to power down we're already in * standby. */ if (powerdown) { snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE); dapm_seq_run(codec, &down_list, 0, dapm_down_seq); snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY); } snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF); } /* Module information */ MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC"); MODULE_LICENSE("GPL");