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Diffstat (limited to 'sound/soc/soc-dapm.c')
| -rw-r--r-- | sound/soc/soc-dapm.c | 1323 |
1 files changed, 1323 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c new file mode 100644 index 0000000..7caf8c7 --- /dev/null +++ b/sound/soc/soc-dapm.c @@ -0,0 +1,1323 @@ +/* + * 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. + * + * Revision history + * 12th Aug 2005 Initial version. + * 25th Oct 2005 Implemented path power domain. + * 18th Dec 2005 Implemented machine and stream level power domain. + * + * 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 susbsytem 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/driver.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> + +/* debug */ +#define DAPM_DEBUG 0 +#if DAPM_DEBUG +#define dump_dapm(codec, action) dbg_dump_dapm(codec, action) +#define dbg(format, arg...) printk(format, ## arg) +#else +#define dump_dapm(codec, action) +#define dbg(format, arg...) +#endif + +#define POP_DEBUG 0 +#if POP_DEBUG +#define POP_TIME 500 /* 500 msecs - change if pop debug is too fast */ +#define pop_wait(time) schedule_timeout_interruptible(msecs_to_jiffies(time)) +#define pop_dbg(format, arg...) printk(format, ## arg); pop_wait(POP_TIME) +#else +#define pop_dbg(format, arg...) +#define pop_wait(time) +#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"); + +/* 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(POP_TIME); + } + dbg("reg old %x new %x change %d\n", 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; +} + +/* + * 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; + } + + /* programmable gain/attenuation */ + if (w->id == snd_soc_dapm_pga) { + int on; + in = is_connected_input_ep(w); + dapm_clear_walk(w->codec); + out = is_connected_output_ep(w); + dapm_clear_walk(w->codec); + w->power = on = (out != 0 && in != 0) ? 1 : 0; + + if (!on) + dapm_set_pga(w, on); /* lower volume to reduce pops */ + dapm_update_bits(w); + if (on) + dapm_set_pga(w, on); /* restore volume from zero */ + + 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, SND_SOC_DAPM_PRE_PMU); + if (ret < 0) + return ret; + } else if (event == SND_SOC_DAPM_STREAM_STOP) { + ret = w->event(w, 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, SND_SOC_DAPM_POST_PMU); + if (ret < 0) + return ret; + } else if (event == SND_SOC_DAPM_STREAM_STOP) { + ret = w->event(w, 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; + + /* call any power change event handlers */ + if (power_change) { + if (w->event) { + dbg("power %s event for %s flags %x\n", + w->power ? "on" : "off", w->name, w->event_flags); + if (power) { + /* power up event */ + if (w->event_flags & SND_SOC_DAPM_PRE_PMU) { + ret = w->event(w, SND_SOC_DAPM_PRE_PMU); + if (ret < 0) + return ret; + } + dapm_update_bits(w); + if (w->event_flags & SND_SOC_DAPM_POST_PMU){ + ret = w->event(w, SND_SOC_DAPM_POST_PMU); + if (ret < 0) + return ret; + } + } else { + /* power down event */ + if (w->event_flags & SND_SOC_DAPM_PRE_PMD) { + ret = w->event(w, SND_SOC_DAPM_PRE_PMD); + if (ret < 0) + return ret; + } + dapm_update_bits(w); + if (w->event_flags & SND_SOC_DAPM_POST_PMD) { + ret = w->event(w, SND_SOC_DAPM_POST_PMD); + if (ret < 0) + return ret; + } + } + } else + /* no event handler */ + dapm_update_bits(w); + } + } + } + + return ret; +} + +#if DAPM_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); + + return 0; +} + +/* test and update the power status of a mixer 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) + 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); + + 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->dapm_state){ + case SNDRV_CTL_POWER_D0: + state = "D0"; + break; + case SNDRV_CTL_POWER_D1: + state = "D1"; + break; + case SNDRV_CTL_POWER_D2: + state = "D2"; + break; + case SNDRV_CTL_POWER_D3hot: + state = "D3hot"; + break; + case SNDRV_CTL_POWER_D3cold: + state = "D3cold"; + 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) +{ + int ret = 0; + + if (dapm_status) + ret = device_create_file(dev, &dev_attr_dapm_widget); + + return ret; +} + +static void snd_soc_dapm_sys_remove(struct device *dev) +{ + if (dapm_status) + 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); + } +} + +/** + * snd_soc_dapm_sync_endpoints - 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_endpoints(struct snd_soc_codec *codec) +{ + return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP); +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_endpoints); + +/** + * 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. + * + * 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) +{ + 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->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) + 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; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input); + +/** + * 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; + + mutex_lock(&codec->mutex); + 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); + mutex_unlock(&codec->mutex); + 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 mask = (kcontrol->private_value >> 16) & 0xff; + int invert = (kcontrol->private_value >> 24) & 0x01; + + /* 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] = + mask - ucontrol->value.integer.value[0]; + if (shift != rshift) + ucontrol->value.integer.value[1] = + mask - 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 mask = (kcontrol->private_value >> 16) & 0xff; + 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 = mask - val; + val_mask = mask << shift; + val = val << shift; + if (shift != rshift) { + val2 = (ucontrol->value.integer.value[1] & mask); + if (invert) + val2 = mask - 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, SND_SOC_DAPM_PRE_REG); + if (ret < 0) + 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, 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, 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, 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_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; + dbg("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, __FUNCTION__); + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event); + +/** + * snd_soc_dapm_set_endpoint - set audio endpoint status + * @codec: audio codec + * @endpoint: audio signal endpoint (or start point) + * @status: point status + * + * Set audio endpoint status - connected or disconnected. + * + * Returns 0 for success else error. + */ +int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec, + char *endpoint, int status) +{ + struct snd_soc_dapm_widget *w; + + list_for_each_entry(w, &codec->dapm_widgets, list) { + if (!strcmp(w->name, endpoint)) { + w->connected = status; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_set_endpoint); + +/** + * 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"); |