/* * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management * * Copyright 2005 Wolfson Microelectronics PLC. * Author: Liam Girdwood * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.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; 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 * DAC's/ADC's. * 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 <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc-dapm.h> #include <sound/initval.h> /* debug */ #ifdef DEBUG #define dump_dapm(codec, action) dbg_dump_dapm(codec, action) #else #define dump_dapm(codec, action) #endif /* dapm power sequences - make this per codec in the future */ static int dapm_up_seq[] = { snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic, snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post }; static int dapm_down_seq[] = { snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic, snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_post }; static int dapm_status = 1; module_param(dapm_status, int, 0); MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries"); static unsigned int pop_time; static void pop_wait(void) { if (pop_time) schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time)); } static void pop_dbg(const char *fmt, ...) { va_list args; va_start(args, fmt); if (pop_time) { vprintk(fmt, args); pop_wait(); } 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); } /* 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: { int val; int reg = w->kcontrols[i].private_value & 0xff; int shift = (w->kcontrols[i].private_value >> 8) & 0x0f; int mask = (w->kcontrols[i].private_value >> 16) & 0xff; int invert = (w->kcontrols[i].private_value >> 24) & 0x01; 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->mask; 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->mask; 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: 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 it's 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->mask; 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 it's 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 short 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("pop test %s : %s in %d ms\n", widget->name, widget->power ? "on" : "off", pop_time); snd_soc_write(codec, widget->reg, new); pop_wait(); } 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) { int reg = k->private_value & 0xff; int shift = (k->private_value >> 8) & 0x0f; int mask = (k->private_value >> 16) & 0xff; int invert = (k->private_value >> 24) & 0x01; if (power) { int i; /* power up has happended, increase volume to last level */ if (invert) { for (i = mask; 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; char name[32]; 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 */ snprintf(name, 32, "%s %s", w->name, w->kcontrols[i].name); path->long_name = kstrdup (name, GFP_KERNEL); if (path->long_name == NULL) return -ENOMEM; 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\n", path->long_name); 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_adc && widget->active) return 1; 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) 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; /* active stream ? */ if (widget->id == snd_soc_dapm_dac && widget->active) return 1; 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) 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); /* * 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_dapm_widget *w; int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power; /* do we have a sequenced stream event */ if (event == SND_SOC_DAPM_STREAM_START) { c = ARRAY_SIZE(dapm_up_seq); seq = dapm_up_seq; } else if (event == SND_SOC_DAPM_STREAM_STOP) { c = ARRAY_SIZE(dapm_down_seq); seq = dapm_down_seq; } for(i = 0; i < c; i++) { list_for_each_entry(w, &codec->dapm_widgets, list) { /* is widget in stream order */ if (seq && seq[i] && w->id != seq[i]) continue; /* vmid - no action */ if (w->id == snd_soc_dapm_vmid) continue; /* active ADC */ if (w->id == snd_soc_dapm_adc && w->active) { in = is_connected_input_ep(w); dapm_clear_walk(w->codec); w->power = (in != 0) ? 1 : 0; dapm_update_bits(w); continue; } /* active DAC */ if (w->id == snd_soc_dapm_dac && w->active) { out = is_connected_output_ep(w); dapm_clear_walk(w->codec); w->power = (out != 0) ? 1 : 0; dapm_update_bits(w); continue; } /* pre and post event widgets */ if (w->id == snd_soc_dapm_pre) { if (!w->event) continue; if (event == SND_SOC_DAPM_STREAM_START) { ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU); if (ret < 0) return ret; } else if (event == SND_SOC_DAPM_STREAM_STOP) { ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD); if (ret < 0) return ret; } continue; } if (w->id == snd_soc_dapm_post) { if (!w->event) continue; if (event == SND_SOC_DAPM_STREAM_START) { ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMU); if (ret < 0) return ret; } else if (event == SND_SOC_DAPM_STREAM_STOP) { ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD); if (ret < 0) return ret; } continue; } /* all other widgets */ in = is_connected_input_ep(w); dapm_clear_walk(w->codec); out = is_connected_output_ep(w); dapm_clear_walk(w->codec); power = (out != 0 && in != 0) ? 1 : 0; power_change = (w->power == power) ? 0: 1; w->power = power; if (!power_change) continue; /* 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 (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 (!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 && !power) dapm_set_pga(w, power); dapm_update_bits(w); /* Raise PGA volume to reduce pops */ if (w->id == snd_soc_dapm_pga && power) dapm_set_pga(w, power); /* power up post event */ if (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 (!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 ret; } #ifdef DEBUG static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action) { struct snd_soc_dapm_widget *w; struct snd_soc_dapm_path *p = NULL; int in, out; printk("DAPM %s %s\n", codec->name, action); list_for_each_entry(w, &codec->dapm_widgets, list) { /* only display widgets that effect routing */ switch (w->id) { case snd_soc_dapm_pre: case snd_soc_dapm_post: case snd_soc_dapm_vmid: continue; case snd_soc_dapm_mux: case snd_soc_dapm_output: case snd_soc_dapm_input: case snd_soc_dapm_switch: 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: if (w->name) { in = is_connected_input_ep(w); dapm_clear_walk(w->codec); out = is_connected_output_ep(w); dapm_clear_walk(w->codec); printk("%s: %s in %d out %d\n", w->name, w->power ? "On":"Off",in, out); list_for_each_entry(p, &w->sources, list_sink) { if (p->connect) printk(" in %s %s\n", p->name ? p->name : "static", p->source->name); } list_for_each_entry(p, &w->sinks, list_source) { if (p->connect) printk(" out %s %s\n", p->name ? p->name : "static", p->sink->name); } } break; } } } #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 mask, int val, struct soc_enum* e) { struct snd_soc_dapm_path *path; int found = 0; if (widget->id != snd_soc_dapm_mux) return -ENODEV; if (!snd_soc_test_bits(widget->codec, e->reg, mask, val)) 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[val]) continue; found = 1; /* we now need to match the string in the enum to the path */ if (!(strcmp(path->name, e->texts[val]))) 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); dump_dapm(widget->codec, "mux power update"); } 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 reg, int val_mask, int val, int invert) { struct snd_soc_dapm_path *path; int found = 0; if (widget->id != snd_soc_dapm_mixer && widget->id != snd_soc_dapm_switch) return -ENODEV; if (!snd_soc_test_bits(widget->codec, reg, val_mask, val)) return 0; /* 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; if (val) /* new connection */ path->connect = invert ? 0:1; else /* old connection must be powered down */ path->connect = invert ? 1:0; break; } if (found) { dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP); dump_dapm(widget->codec, "mixer power update"); } 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->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: 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); /* pop/click delay times */ static ssize_t dapm_pop_time_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", pop_time); } static ssize_t dapm_pop_time_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { unsigned long val; if (strict_strtoul(buf, 10, &val) >= 0) pop_time = val; else printk(KERN_ERR "Unable to parse pop_time setting\n"); return count; } static DEVICE_ATTR(dapm_pop_time, 0744, dapm_pop_time_show, dapm_pop_time_store); int snd_soc_dapm_sys_add(struct device *dev) { int ret = 0; if (dapm_status) { ret = device_create_file(dev, &dev_attr_dapm_widget); if (ret == 0) ret = device_create_file(dev, &dev_attr_dapm_pop_time); } return ret; } static void snd_soc_dapm_sys_remove(struct device *dev) { if (dapm_status) { device_remove_file(dev, &dev_attr_dapm_pop_time); 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, 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) { int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP); dump_dapm(codec, "sync"); return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_sync); static int snd_soc_dapm_add_route(struct snd_soc_codec *codec, const char *sink, const char *control, const char *source) { struct snd_soc_dapm_path *path; struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w; 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; 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 || wsink->id == snd_soc_dapm_line || wsink->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: 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: 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: 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_connect_input - connect dapm widgets * @codec: audio codec * @sink: name of target widget * @control: mixer control name * @source: name of source name * * 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. * * This function has been deprecated in favour of snd_soc_dapm_add_routes(). * * Returns 0 for success else error. */ int snd_soc_dapm_connect_input(struct snd_soc_codec *codec, const char *sink, const char *control, const char *source) { return snd_soc_dapm_add_route(codec, sink, control, source); } EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input); /** * 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->sink, route->control, route->source); 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: dapm_new_mixer(codec, w); break; case snd_soc_dapm_mux: dapm_new_mux(codec, w); break; case snd_soc_dapm_adc: case snd_soc_dapm_dac: case snd_soc_dapm_pga: 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: 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 * @uinfo: 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); int reg = kcontrol->private_value & 0xff; int shift = (kcontrol->private_value >> 8) & 0x0f; int rshift = (kcontrol->private_value >> 12) & 0x0f; int max = (kcontrol->private_value >> 16) & 0xff; int invert = (kcontrol->private_value >> 24) & 0x01; 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 * @uinfo: 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); int reg = kcontrol->private_value & 0xff; int shift = (kcontrol->private_value >> 8) & 0x0f; int rshift = (kcontrol->private_value >> 12) & 0x0f; int max = (kcontrol->private_value >> 16) & 0xff; int mask = (1 << fls(max)) - 1; int invert = (kcontrol->private_value >> 24) & 0x01; unsigned short val, val2, val_mask; 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; } dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert); 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 * @uinfo: 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 short val, bitmask; for (bitmask = 1; bitmask < e->mask; 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 * @uinfo: 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 short val, mux; unsigned short mask, bitmask; int ret = 0; for (bitmask = 1; bitmask < e->mask; bitmask <<= 1) ; if (ucontrol->value.enumerated.item[0] > e->mask - 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->mask - 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; dapm_mux_update_power(widget, kcontrol, mask, mux, e); 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) 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); } else ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); out: mutex_unlock(&widget->codec->mutex); return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double); /** * 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) 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; } } } mutex_unlock(&codec->mutex); dapm_power_widgets(codec, event); dump_dapm(codec, __func__); return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event); /** * 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. */ int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev, enum snd_soc_bias_level level) { struct snd_soc_codec *codec = socdev->codec; struct snd_soc_machine *machine = socdev->machine; int ret = 0; if (machine->set_bias_level) ret = machine->set_bias_level(machine, level); if (ret == 0 && codec->set_bias_level) ret = codec->set_bias_level(codec, level); return ret; } /** * snd_soc_dapm_enable_pin - enable pin. * @snd_soc_codec: SoC codec * @pin: pin name * * Enables input/output pin and it's 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, 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 it's 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, char *pin) { return snd_soc_dapm_set_pin(codec, pin, 0); } EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_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, 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->codec; snd_soc_dapm_sys_remove(socdev->dev); dapm_free_widgets(codec); } EXPORT_SYMBOL_GPL(snd_soc_dapm_free); /* Module information */ MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC"); MODULE_LICENSE("GPL");