| /* |
| * 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/async.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 <linux/slab.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc.h> |
| #include <sound/initval.h> |
| |
| #include <trace/events/asoc.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_virt_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_out_drv] = 10, |
| [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_out_drv] = 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_virt_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(struct device *dev, u32 pop_time, const char *fmt, ...) |
| { |
| va_list args; |
| char *buf; |
| |
| if (!pop_time) |
| return; |
| |
| buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| if (buf == NULL) |
| return; |
| |
| va_start(args, fmt); |
| vsnprintf(buf, PAGE_SIZE, fmt, args); |
| dev_info(dev, "%s", buf); |
| va_end(args); |
| |
| kfree(buf); |
| } |
| |
| /* 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 |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, |
| enum snd_soc_bias_level level) |
| { |
| struct snd_soc_card *card = dapm->card; |
| int ret = 0; |
| |
| trace_snd_soc_bias_level_start(card, level); |
| |
| if (card && card->set_bias_level) |
| ret = card->set_bias_level(card, level); |
| if (ret == 0) { |
| if (dapm->codec && dapm->codec->driver->set_bias_level) |
| ret = dapm->codec->driver->set_bias_level(dapm->codec, level); |
| else |
| dapm->bias_level = level; |
| } |
| if (ret == 0) { |
| if (card && card->set_bias_level_post) |
| ret = card->set_bias_level_post(card, level); |
| } |
| |
| trace_snd_soc_bias_level_done(card, 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->kcontrol_news[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->kcontrol_news[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_virt_mux: { |
| struct soc_enum *e = (struct soc_enum *) |
| w->kcontrol_news[i].private_value; |
| |
| p->connect = 0; |
| /* since a virtual mux has no backing registers to |
| * decide which path to connect, it will try to match |
| * with the first enumeration. This is to ensure |
| * that the default mux choice (the first) will be |
| * correctly powered up during initialization. |
| */ |
| if (!strcmp(p->name, e->texts[0])) |
| p->connect = 1; |
| } |
| break; |
| case snd_soc_dapm_value_mux: { |
| struct soc_enum *e = (struct soc_enum *) |
| w->kcontrol_news[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_out_drv: |
| 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_dapm_context *dapm, |
| 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, &dapm->card->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_dapm_context *dapm, |
| 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->kcontrol_news[i].name)) { |
| list_add(&path->list, &dapm->card->paths); |
| list_add(&path->list_sink, &dest->sources); |
| list_add(&path->list_source, &src->sinks); |
| path->name = dest->kcontrol_news[i].name; |
| dapm_set_path_status(dest, path, i); |
| return 0; |
| } |
| } |
| return -ENODEV; |
| } |
| |
| static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm, |
| struct snd_soc_dapm_widget *kcontrolw, |
| const struct snd_kcontrol_new *kcontrol_new, |
| struct snd_kcontrol **kcontrol) |
| { |
| struct snd_soc_dapm_widget *w; |
| int i; |
| |
| *kcontrol = NULL; |
| |
| list_for_each_entry(w, &dapm->card->widgets, list) { |
| if (w == kcontrolw || w->dapm != kcontrolw->dapm) |
| continue; |
| for (i = 0; i < w->num_kcontrols; i++) { |
| if (&w->kcontrol_news[i] == kcontrol_new) { |
| if (w->kcontrols) |
| *kcontrol = w->kcontrols[i]; |
| return 1; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* create new dapm mixer control */ |
| static int dapm_new_mixer(struct snd_soc_dapm_context *dapm, |
| struct snd_soc_dapm_widget *w) |
| { |
| int i, ret = 0; |
| size_t name_len, prefix_len; |
| struct snd_soc_dapm_path *path; |
| struct snd_card *card = dapm->card->snd_card; |
| const char *prefix; |
| struct snd_soc_dapm_widget_list *wlist; |
| size_t wlistsize; |
| |
| if (dapm->codec) |
| prefix = dapm->codec->name_prefix; |
| else |
| prefix = NULL; |
| |
| if (prefix) |
| prefix_len = strlen(prefix) + 1; |
| else |
| prefix_len = 0; |
| |
| /* 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->kcontrol_news[i].name) |
| continue; |
| |
| wlistsize = sizeof(struct snd_soc_dapm_widget_list) + |
| sizeof(struct snd_soc_dapm_widget *), |
| wlist = kzalloc(wlistsize, GFP_KERNEL); |
| if (wlist == NULL) { |
| dev_err(dapm->dev, |
| "asoc: can't allocate widget list for %s\n", |
| w->name); |
| return -ENOMEM; |
| } |
| wlist->num_widgets = 1; |
| wlist->widgets[0] = w; |
| |
| /* 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->kcontrol_news[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) { |
| kfree(wlist); |
| return -ENOMEM; |
| } |
| |
| switch (w->id) { |
| default: |
| /* The control will get a prefix from |
| * the control creation process but |
| * we're also using the same prefix |
| * for widgets so cut the prefix off |
| * the front of the widget name. |
| */ |
| snprintf(path->long_name, name_len, "%s %s", |
| w->name + prefix_len, |
| w->kcontrol_news[i].name); |
| break; |
| case snd_soc_dapm_mixer_named_ctl: |
| snprintf(path->long_name, name_len, "%s", |
| w->kcontrol_news[i].name); |
| break; |
| } |
| |
| path->long_name[name_len - 1] = '\0'; |
| |
| path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i], |
| wlist, path->long_name, |
| prefix); |
| ret = snd_ctl_add(card, path->kcontrol); |
| if (ret < 0) { |
| dev_err(dapm->dev, |
| "asoc: failed to add dapm kcontrol %s: %d\n", |
| path->long_name, ret); |
| kfree(wlist); |
| kfree(path->long_name); |
| path->long_name = NULL; |
| return ret; |
| } |
| w->kcontrols[i] = path->kcontrol; |
| } |
| } |
| return ret; |
| } |
| |
| /* create new dapm mux control */ |
| static int dapm_new_mux(struct snd_soc_dapm_context *dapm, |
| struct snd_soc_dapm_widget *w) |
| { |
| struct snd_soc_dapm_path *path = NULL; |
| struct snd_kcontrol *kcontrol; |
| struct snd_card *card = dapm->card->snd_card; |
| const char *prefix; |
| size_t prefix_len; |
| int ret; |
| struct snd_soc_dapm_widget_list *wlist; |
| int shared, wlistentries; |
| size_t wlistsize; |
| char *name; |
| |
| if (w->num_kcontrols != 1) { |
| dev_err(dapm->dev, |
| "asoc: mux %s has incorrect number of controls\n", |
| w->name); |
| return -EINVAL; |
| } |
| |
| shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0], |
| &kcontrol); |
| if (kcontrol) { |
| wlist = kcontrol->private_data; |
| wlistentries = wlist->num_widgets + 1; |
| } else { |
| wlist = NULL; |
| wlistentries = 1; |
| } |
| wlistsize = sizeof(struct snd_soc_dapm_widget_list) + |
| wlistentries * sizeof(struct snd_soc_dapm_widget *), |
| wlist = krealloc(wlist, wlistsize, GFP_KERNEL); |
| if (wlist == NULL) { |
| dev_err(dapm->dev, |
| "asoc: can't allocate widget list for %s\n", w->name); |
| return -ENOMEM; |
| } |
| wlist->num_widgets = wlistentries; |
| wlist->widgets[wlistentries - 1] = w; |
| |
| if (!kcontrol) { |
| if (dapm->codec) |
| prefix = dapm->codec->name_prefix; |
| else |
| prefix = NULL; |
| |
| if (shared) { |
| name = w->kcontrol_news[0].name; |
| prefix_len = 0; |
| } else { |
| name = w->name; |
| if (prefix) |
| prefix_len = strlen(prefix) + 1; |
| else |
| prefix_len = 0; |
| } |
| |
| /* |
| * The control will get a prefix from the control creation |
| * process but we're also using the same prefix for widgets so |
| * cut the prefix off the front of the widget name. |
| */ |
| kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist, |
| name + prefix_len, prefix); |
| ret = snd_ctl_add(card, kcontrol); |
| if (ret < 0) { |
| dev_err(dapm->dev, |
| "asoc: failed to add kcontrol %s\n", w->name); |
| kfree(wlist); |
| return ret; |
| } |
| } |
| |
| kcontrol->private_data = wlist; |
| |
| w->kcontrols[0] = kcontrol; |
| |
| list_for_each_entry(path, &w->sources, list_sink) |
| path->kcontrol = kcontrol; |
| |
| return 0; |
| } |
| |
| /* create new dapm volume control */ |
| static int dapm_new_pga(struct snd_soc_dapm_context *dapm, |
| struct snd_soc_dapm_widget *w) |
| { |
| if (w->num_kcontrols) |
| dev_err(w->dapm->dev, |
| "asoc: PGA controls not supported: '%s'\n", w->name); |
| |
| return 0; |
| } |
| |
| /* reset 'walked' bit for each dapm path */ |
| static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm) |
| { |
| struct snd_soc_dapm_path *p; |
| |
| list_for_each_entry(p, &dapm->card->paths, list) |
| p->walked = 0; |
| } |
| |
| /* We implement power down on suspend by checking the power state of |
| * the ALSA card - when we are suspending the ALSA state for the card |
| * is set to D3. |
| */ |
| static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget) |
| { |
| int level = snd_power_get_state(widget->dapm->card->snd_card); |
| |
| switch (level) { |
| case SNDRV_CTL_POWER_D3hot: |
| case SNDRV_CTL_POWER_D3cold: |
| if (widget->ignore_suspend) |
| dev_dbg(widget->dapm->dev, "%s ignoring suspend\n", |
| widget->name); |
| return widget->ignore_suspend; |
| default: |
| return 1; |
| } |
| } |
| |
| /* |
| * 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 snd_soc_dapm_suspend_check(widget); |
| default: |
| break; |
| } |
| |
| if (widget->connected) { |
| /* connected pin ? */ |
| if (widget->id == snd_soc_dapm_output && !widget->ext) |
| return snd_soc_dapm_suspend_check(widget); |
| |
| /* 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 snd_soc_dapm_suspend_check(widget); |
| } |
| |
| 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 snd_soc_dapm_suspend_check(widget); |
| default: |
| break; |
| } |
| |
| if (widget->connected) { |
| /* connected pin ? */ |
| if (widget->id == snd_soc_dapm_input && !widget->ext) |
| return snd_soc_dapm_suspend_check(widget); |
| |
| /* connected VMID/Bias for lower pops */ |
| if (widget->id == snd_soc_dapm_vmid) |
| return snd_soc_dapm_suspend_check(widget); |
| |
| /* connected jack ? */ |
| if (widget->id == snd_soc_dapm_mic || |
| (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks))) |
| return snd_soc_dapm_suspend_check(widget); |
| } |
| |
| 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); |
| |
| /* 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->dapm); |
| out = is_connected_output_ep(w); |
| dapm_clear_walk(w->dapm); |
| 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->dapm); |
| 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->dapm); |
| 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) |
| continue; |
| |
| if (path->sink->force) { |
| power = 1; |
| break; |
| } |
| |
| if (path->sink->power_check && |
| path->sink->power_check(path->sink)) { |
| power = 1; |
| break; |
| } |
| } |
| |
| dapm_clear_walk(w->dapm); |
| |
| return power; |
| } |
| |
| static int dapm_seq_compare(struct snd_soc_dapm_widget *a, |
| struct snd_soc_dapm_widget *b, |
| bool power_up) |
| { |
| int *sort; |
| |
| if (power_up) |
| sort = dapm_up_seq; |
| else |
| sort = dapm_down_seq; |
| |
| if (sort[a->id] != sort[b->id]) |
| return sort[a->id] - sort[b->id]; |
| if (a->subseq != b->subseq) { |
| if (power_up) |
| return a->subseq - b->subseq; |
| else |
| return b->subseq - a->subseq; |
| } |
| if (a->reg != b->reg) |
| return a->reg - b->reg; |
| if (a->dapm != b->dapm) |
| return (unsigned long)a->dapm - (unsigned long)b->dapm; |
| |
| 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, |
| bool power_up) |
| { |
| struct snd_soc_dapm_widget *w; |
| |
| list_for_each_entry(w, list, power_list) |
| if (dapm_seq_compare(new_widget, w, power_up) < 0) { |
| list_add_tail(&new_widget->power_list, &w->power_list); |
| return; |
| } |
| |
| list_add_tail(&new_widget->power_list, list); |
| } |
| |
| static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm, |
| struct snd_soc_dapm_widget *w, int event) |
| { |
| struct snd_soc_card *card = dapm->card; |
| const char *ev_name; |
| int power, ret; |
| |
| switch (event) { |
| case SND_SOC_DAPM_PRE_PMU: |
| ev_name = "PRE_PMU"; |
| power = 1; |
| break; |
| case SND_SOC_DAPM_POST_PMU: |
| ev_name = "POST_PMU"; |
| power = 1; |
| break; |
| case SND_SOC_DAPM_PRE_PMD: |
| ev_name = "PRE_PMD"; |
| power = 0; |
| break; |
| case SND_SOC_DAPM_POST_PMD: |
| ev_name = "POST_PMD"; |
| power = 0; |
| break; |
| default: |
| BUG(); |
| return; |
| } |
| |
| if (w->power != power) |
| return; |
| |
| if (w->event && (w->event_flags & event)) { |
| pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n", |
| w->name, ev_name); |
| trace_snd_soc_dapm_widget_event_start(w, event); |
| ret = w->event(w, NULL, event); |
| trace_snd_soc_dapm_widget_event_done(w, event); |
| if (ret < 0) |
| pr_err("%s: %s event failed: %d\n", |
| ev_name, w->name, ret); |
| } |
| } |
| |
| /* Apply the coalesced changes from a DAPM sequence */ |
| static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm, |
| struct list_head *pending) |
| { |
| struct snd_soc_card *card = dapm->card; |
| struct snd_soc_dapm_widget *w; |
| int reg, power; |
| 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(dapm->dev, card->pop_time, |
| "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n", |
| w->name, reg, value, mask); |
| |
| /* Check for events */ |
| dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU); |
| dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD); |
| } |
| |
| if (reg >= 0) { |
| pop_dbg(dapm->dev, card->pop_time, |
| "pop test : Applying 0x%x/0x%x to %x in %dms\n", |
| value, mask, reg, card->pop_time); |
| pop_wait(card->pop_time); |
| snd_soc_update_bits(dapm->codec, reg, mask, value); |
| } |
| |
| list_for_each_entry(w, pending, power_list) { |
| dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU); |
| dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD); |
| } |
| } |
| |
| /* 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_dapm_context *dapm, |
| struct list_head *list, int event, bool power_up) |
| { |
| struct snd_soc_dapm_widget *w, *n; |
| LIST_HEAD(pending); |
| int cur_sort = -1; |
| int cur_subseq = -1; |
| int cur_reg = SND_SOC_NOPM; |
| struct snd_soc_dapm_context *cur_dapm = NULL; |
| int ret, i; |
| int *sort; |
| |
| if (power_up) |
| sort = dapm_up_seq; |
| else |
| sort = dapm_down_seq; |
| |
| 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 || |
| w->dapm != cur_dapm || w->subseq != cur_subseq) { |
| if (!list_empty(&pending)) |
| dapm_seq_run_coalesced(cur_dapm, &pending); |
| |
| if (cur_dapm && cur_dapm->seq_notifier) { |
| for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++) |
| if (sort[i] == cur_sort) |
| cur_dapm->seq_notifier(cur_dapm, |
| i, |
| cur_subseq); |
| } |
| |
| INIT_LIST_HEAD(&pending); |
| cur_sort = -1; |
| cur_subseq = -1; |
| cur_reg = SND_SOC_NOPM; |
| cur_dapm = NULL; |
| } |
| |
| 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; |
| |
| default: |
| /* Queue it up for application */ |
| cur_sort = sort[w->id]; |
| cur_subseq = w->subseq; |
| cur_reg = w->reg; |
| cur_dapm = w->dapm; |
| list_move(&w->power_list, &pending); |
| break; |
| } |
| |
| if (ret < 0) |
| dev_err(w->dapm->dev, |
| "Failed to apply widget power: %d\n", ret); |
| } |
| |
| if (!list_empty(&pending)) |
| dapm_seq_run_coalesced(cur_dapm, &pending); |
| |
| if (cur_dapm && cur_dapm->seq_notifier) { |
| for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++) |
| if (sort[i] == cur_sort) |
| cur_dapm->seq_notifier(cur_dapm, |
| i, cur_subseq); |
| } |
| } |
| |
| static void dapm_widget_update(struct snd_soc_dapm_context *dapm) |
| { |
| struct snd_soc_dapm_update *update = dapm->update; |
| struct snd_soc_dapm_widget *w; |
| int ret; |
| |
| if (!update) |
| return; |
| |
| w = update->widget; |
| |
| if (w->event && |
| (w->event_flags & SND_SOC_DAPM_PRE_REG)) { |
| ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG); |
| if (ret != 0) |
| pr_err("%s DAPM pre-event failed: %d\n", |
| w->name, ret); |
| } |
| |
| ret = snd_soc_update_bits(w->codec, update->reg, update->mask, |
| update->val); |
| if (ret < 0) |
| pr_err("%s DAPM update failed: %d\n", w->name, ret); |
| |
| if (w->event && |
| (w->event_flags & SND_SOC_DAPM_POST_REG)) { |
| ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG); |
| if (ret != 0) |
| pr_err("%s DAPM post-event failed: %d\n", |
| w->name, ret); |
| } |
| } |
| |
| /* Async callback run prior to DAPM sequences - brings to _PREPARE if |
| * they're changing state. |
| */ |
| static void dapm_pre_sequence_async(void *data, async_cookie_t cookie) |
| { |
| struct snd_soc_dapm_context *d = data; |
| int ret; |
| |
| /* If we're off and we're not supposed to be go into STANDBY */ |
| if (d->bias_level == SND_SOC_BIAS_OFF && |
| d->target_bias_level != SND_SOC_BIAS_OFF) { |
| ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY); |
| if (ret != 0) |
| dev_err(d->dev, |
| "Failed to turn on bias: %d\n", ret); |
| } |
| |
| /* Prepare for a STADDBY->ON or ON->STANDBY transition */ |
| if (d->bias_level != d->target_bias_level) { |
| ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE); |
| if (ret != 0) |
| dev_err(d->dev, |
| "Failed to prepare bias: %d\n", ret); |
| } |
| } |
| |
| /* Async callback run prior to DAPM sequences - brings to their final |
| * state. |
| */ |
| static void dapm_post_sequence_async(void *data, async_cookie_t cookie) |
| { |
| struct snd_soc_dapm_context *d = data; |
| int ret; |
| |
| /* If we just powered the last thing off drop to standby bias */ |
| if (d->bias_level == SND_SOC_BIAS_PREPARE && |
| (d->target_bias_level == SND_SOC_BIAS_STANDBY || |
| d->target_bias_level == SND_SOC_BIAS_OFF)) { |
| ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY); |
| if (ret != 0) |
| dev_err(d->dev, "Failed to apply standby bias: %d\n", |
| ret); |
| } |
| |
| /* If we're in standby and can support bias off then do that */ |
| if (d->bias_level == SND_SOC_BIAS_STANDBY && |
| d->target_bias_level == SND_SOC_BIAS_OFF) { |
| ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF); |
| if (ret != 0) |
| dev_err(d->dev, "Failed to turn off bias: %d\n", ret); |
| } |
| |
| /* If we just powered up then move to active bias */ |
| if (d->bias_level == SND_SOC_BIAS_PREPARE && |
| d->target_bias_level == SND_SOC_BIAS_ON) { |
| ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON); |
| if (ret != 0) |
| dev_err(d->dev, "Failed to apply active bias: %d\n", |
| ret); |
| } |
| } |
| |
| /* |
| * 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_dapm_context *dapm, int event) |
| { |
| struct snd_soc_card *card = dapm->card; |
| struct snd_soc_dapm_widget *w; |
| struct snd_soc_dapm_context *d; |
| LIST_HEAD(up_list); |
| LIST_HEAD(down_list); |
| LIST_HEAD(async_domain); |
| enum snd_soc_bias_level bias; |
| int power; |
| |
| trace_snd_soc_dapm_start(card); |
| |
| list_for_each_entry(d, &card->dapm_list, list) { |
| if (d->n_widgets || d->codec == NULL) { |
| if (d->idle_bias_off) |
| d->target_bias_level = SND_SOC_BIAS_OFF; |
| else |
| d->target_bias_level = SND_SOC_BIAS_STANDBY; |
| } |
| } |
| |
| /* 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, &card->widgets, list) { |
| switch (w->id) { |
| case snd_soc_dapm_pre: |
| dapm_seq_insert(w, &down_list, false); |
| break; |
| case snd_soc_dapm_post: |
| dapm_seq_insert(w, &up_list, true); |
| break; |
| |
| default: |
| if (!w->power_check) |
| continue; |
| |
| if (!w->force) |
| power = w->power_check(w); |
| else |
| power = 1; |
| |
| if (power) { |
| d = w->dapm; |
| |
| /* Supplies and micbiases only bring |
| * the context up to STANDBY as unless |
| * something else is active and |
| * passing audio they generally don't |
| * require full power. |
| */ |
| switch (w->id) { |
| case snd_soc_dapm_supply: |
| case snd_soc_dapm_micbias: |
| if (d->target_bias_level < SND_SOC_BIAS_STANDBY) |
| d->target_bias_level = SND_SOC_BIAS_STANDBY; |
| break; |
| default: |
| d->target_bias_level = SND_SOC_BIAS_ON; |
| break; |
| } |
| } |
| |
| if (w->power == power) |
| continue; |
| |
| trace_snd_soc_dapm_widget_power(w, power); |
| |
| if (power) |
| dapm_seq_insert(w, &up_list, true); |
| else |
| dapm_seq_insert(w, &down_list, false); |
| |
| w->power = power; |
| break; |
| } |
| } |
| |
| /* If there are no DAPM widgets then try to figure out power from the |
| * event type. |
| */ |
| if (!dapm->n_widgets) { |
| switch (event) { |
| case SND_SOC_DAPM_STREAM_START: |
| case SND_SOC_DAPM_STREAM_RESUME: |
| dapm->target_bias_level = SND_SOC_BIAS_ON; |
| break; |
| case SND_SOC_DAPM_STREAM_STOP: |
| if (dapm->codec->active) |
| dapm->target_bias_level = SND_SOC_BIAS_ON; |
| else |
| dapm->target_bias_level = SND_SOC_BIAS_STANDBY; |
| break; |
| case SND_SOC_DAPM_STREAM_SUSPEND: |
| dapm->target_bias_level = SND_SOC_BIAS_STANDBY; |
| break; |
| case SND_SOC_DAPM_STREAM_NOP: |
| dapm->target_bias_level = dapm->bias_level; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* Force all contexts in the card to the same bias state */ |
| bias = SND_SOC_BIAS_OFF; |
| list_for_each_entry(d, &card->dapm_list, list) |
| if (d->target_bias_level > bias) |
| bias = d->target_bias_level; |
| list_for_each_entry(d, &card->dapm_list, list) |
| d->target_bias_level = bias; |
| |
| |
| /* Run all the bias changes in parallel */ |
| list_for_each_entry(d, &dapm->card->dapm_list, list) |
| async_schedule_domain(dapm_pre_sequence_async, d, |
| &async_domain); |
| async_synchronize_full_domain(&async_domain); |
| |
| /* Power down widgets first; try to avoid amplifying pops. */ |
| dapm_seq_run(dapm, &down_list, event, false); |
| |
| dapm_widget_update(dapm); |
| |
| /* Now power up. */ |
| dapm_seq_run(dapm, &up_list, event, true); |
| |
| /* Run all the bias changes in parallel */ |
| list_for_each_entry(d, &dapm->card->dapm_list, list) |
| async_schedule_domain(dapm_post_sequence_async, d, |
| &async_domain); |
| async_synchronize_full_domain(&async_domain); |
| |
| pop_dbg(dapm->dev, card->pop_time, |
| "DAPM sequencing finished, waiting %dms\n", card->pop_time); |
| pop_wait(card->pop_time); |
| |
| trace_snd_soc_dapm_done(card); |
| |
| 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->dapm); |
| out = is_connected_output_ep(w); |
| dapm_clear_walk(w->dapm); |
| |
| 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, |
| .llseek = default_llseek, |
| }; |
| |
| static int dapm_bias_open_file(struct inode *inode, struct file *file) |
| { |
| file->private_data = inode->i_private; |
| return 0; |
| } |
| |
| static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf, |
| size_t count, loff_t *ppos) |
| { |
| struct snd_soc_dapm_context *dapm = file->private_data; |
| char *level; |
| |
| switch (dapm->bias_level) { |
| case SND_SOC_BIAS_ON: |
| level = "On\n"; |
| break; |
| case SND_SOC_BIAS_PREPARE: |
| level = "Prepare\n"; |
| break; |
| case SND_SOC_BIAS_STANDBY: |
| level = "Standby\n"; |
| break; |
| case SND_SOC_BIAS_OFF: |
| level = "Off\n"; |
| break; |
| default: |
| BUG(); |
| level = "Unknown\n"; |
| break; |
| } |
| |
| return simple_read_from_buffer(user_buf, count, ppos, level, |
| strlen(level)); |
| } |
| |
| static const struct file_operations dapm_bias_fops = { |
| .open = dapm_bias_open_file, |
| .read = dapm_bias_read_file, |
| .llseek = default_llseek, |
| }; |
| |
| void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, |
| struct dentry *parent) |
| { |
| struct dentry *d; |
| |
| dapm->debugfs_dapm = debugfs_create_dir("dapm", parent); |
| |
| if (!dapm->debugfs_dapm) { |
| printk(KERN_WARNING |
| "Failed to create DAPM debugfs directory\n"); |
| return; |
| } |
| |
| d = debugfs_create_file("bias_level", 0444, |
| dapm->debugfs_dapm, dapm, |
| &dapm_bias_fops); |
| if (!d) |
| dev_warn(dapm->dev, |
| "ASoC: Failed to create bias level debugfs file\n"); |
| } |
| |
| static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w) |
| { |
| struct snd_soc_dapm_context *dapm = w->dapm; |
| struct dentry *d; |
| |
| if (!dapm->debugfs_dapm || !w->name) |
| return; |
| |
| d = debugfs_create_file(w->name, 0444, |
| dapm->debugfs_dapm, w, |
| &dapm_widget_power_fops); |
| if (!d) |
| dev_warn(w->dapm->dev, |
| "ASoC: Failed to create %s debugfs file\n", |
| w->name); |
| } |
| |
| static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm) |
| { |
| debugfs_remove_recursive(dapm->debugfs_dapm); |
| } |
| |
| #else |
| void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, |
| struct dentry *parent) |
| { |
| } |
| |
| static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w) |
| { |
| } |
| |
| static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm) |
| { |
| } |
| |
| #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_virt_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->dapm->card->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->dapm, 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->dapm->card->paths, list) { |
| if (path->kcontrol != kcontrol) |
| continue; |
| |
| /* found, now check type */ |
| found = 1; |
| path->connect = connect; |
| break; |
| } |
| |
| if (found) |
| dapm_power_widgets(widget->dapm, 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_pcm_runtime *rtd = |
| container_of(dev, struct snd_soc_pcm_runtime, dev); |
| struct snd_soc_codec *codec =rtd->codec; |
| struct snd_soc_dapm_widget *w; |
| int count = 0; |
| char *state = "not set"; |
| |
| list_for_each_entry(w, &codec->card->widgets, list) { |
| if (w->dapm != &codec->dapm) |
| continue; |
| |
| /* 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_out_drv: |
| 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->dapm.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_dapm_context *dapm) |
| { |
| struct snd_soc_dapm_widget *w, *next_w; |
| struct snd_soc_dapm_path *p, *next_p; |
| |
| list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) { |
| if (w->dapm != dapm) |
| continue; |
| list_del(&w->list); |
| /* |
| * remove source and sink paths associated to this widget. |
| * While removing the path, remove reference to it from both |
| * source and sink widgets so that path is removed only once. |
| */ |
| list_for_each_entry_safe(p, next_p, &w->sources, list_sink) { |
| list_del(&p->list_sink); |
| list_del(&p->list_source); |
| list_del(&p->list); |
| kfree(p->long_name); |
| kfree(p); |
| } |
| list_for_each_entry_safe(p, next_p, &w->sinks, list_source) { |
| list_del(&p->list_sink); |
| list_del(&p->list_source); |
| list_del(&p->list); |
| kfree(p->long_name); |
| kfree(p); |
| } |
| kfree(w->kcontrols); |
| kfree(w->name); |
| kfree(w); |
| } |
| } |
| |
| static struct snd_soc_dapm_widget *dapm_find_widget( |
| struct snd_soc_dapm_context *dapm, const char *pin, |
| bool search_other_contexts) |
| { |
| struct snd_soc_dapm_widget *w; |
| struct snd_soc_dapm_widget *fallback = NULL; |
| |
| list_for_each_entry(w, &dapm->card->widgets, list) { |
| if (!strcmp(w->name, pin)) { |
| if (w->dapm == dapm) |
| return w; |
| else |
| fallback = w; |
| } |
| } |
| |
| if (search_other_contexts) |
| return fallback; |
| |
| return NULL; |
| } |
| |
| static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm, |
| const char *pin, int status) |
| { |
| struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); |
| |
| if (!w) { |
| dev_err(dapm->dev, "dapm: unknown pin %s\n", pin); |
| return -EINVAL; |
| } |
| |
| w->connected = status; |
| if (status == 0) |
| w->force = 0; |
| |
| return 0; |
| } |
| |
| /** |
| * snd_soc_dapm_sync - scan and power dapm paths |
| * @dapm: DAPM context |
| * |
| * 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_dapm_context *dapm) |
| { |
| return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP); |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_sync); |
| |
| static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm, |
| const struct snd_soc_dapm_route *route) |
| { |
| struct snd_soc_dapm_path *path; |
| struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w; |
| struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL; |
| const char *sink; |
| const char *control = route->control; |
| const char *source; |
| char prefixed_sink[80]; |
| char prefixed_source[80]; |
| int ret = 0; |
| |
| if (dapm->codec && dapm->codec->name_prefix) { |
| snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s", |
| dapm->codec->name_prefix, route->sink); |
| sink = prefixed_sink; |
| snprintf(prefixed_source, sizeof(prefixed_source), "%s %s", |
| dapm->codec->name_prefix, route->source); |
| source = prefixed_source; |
| } else { |
| sink = route->sink; |
| source = route->source; |
| } |
| |
| /* |
| * find src and dest widgets over all widgets but favor a widget from |
| * current DAPM context |
| */ |
| list_for_each_entry(w, &dapm->card->widgets, list) { |
| if (!wsink && !(strcmp(w->name, sink))) { |
| wtsink = w; |
| if (w->dapm == dapm) |
| wsink = w; |
| continue; |
| } |
| if (!wsource && !(strcmp(w->name, source))) { |
| wtsource = w; |
| if (w->dapm == dapm) |
| wsource = w; |
| } |
| } |
| /* use widget from another DAPM context if not found from this */ |
| if (!wsink) |
| wsink = wtsink; |
| if (!wsource) |
| wsource = wtsource; |
| |
| 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, &dapm->card->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_out_drv: |
| 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, &dapm->card->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_virt_mux: |
| case snd_soc_dapm_value_mux: |
| ret = dapm_connect_mux(dapm, wsource, wsink, path, control, |
| &wsink->kcontrol_news[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(dapm, 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, &dapm->card->paths); |
| list_add(&path->list_sink, &wsink->sources); |
| list_add(&path->list_source, &wsource->sinks); |
| path->connect = 0; |
| return 0; |
| } |
| return 0; |
| |
| err: |
| dev_warn(dapm->dev, "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 |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, |
| const struct snd_soc_dapm_route *route, int num) |
| { |
| int i, ret; |
| |
| for (i = 0; i < num; i++) { |
| ret = snd_soc_dapm_add_route(dapm, route); |
| if (ret < 0) { |
| dev_err(dapm->dev, "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 |
| * @dapm: DAPM context |
| * |
| * 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_dapm_context *dapm) |
| { |
| struct snd_soc_dapm_widget *w; |
| unsigned int val; |
| |
| list_for_each_entry(w, &dapm->card->widgets, list) |
| { |
| if (w->new) |
| continue; |
| |
| if (w->num_kcontrols) { |
| w->kcontrols = kzalloc(w->num_kcontrols * |
| sizeof(struct snd_kcontrol *), |
| GFP_KERNEL); |
| if (!w->kcontrols) |
| return -ENOMEM; |
| } |
| |
| 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(dapm, w); |
| break; |
| case snd_soc_dapm_mux: |
| case snd_soc_dapm_virt_mux: |
| case snd_soc_dapm_value_mux: |
| w->power_check = dapm_generic_check_power; |
| dapm_new_mux(dapm, 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: |
| case snd_soc_dapm_out_drv: |
| w->power_check = dapm_generic_check_power; |
| dapm_new_pga(dapm, 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; |
| } |
| |
| /* Read the initial power state from the device */ |
| if (w->reg >= 0) { |
| val = snd_soc_read(w->codec, w->reg); |
| val &= 1 << w->shift; |
| if (w->invert) |
| val = !val; |
| |
| if (val) |
| w->power = 1; |
| } |
| |
| w->new = 1; |
| |
| dapm_debugfs_add_widget(w); |
| } |
| |
| dapm_power_widgets(dapm, 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| 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; |
| |
| 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| struct snd_soc_codec *codec = widget->codec; |
| struct soc_mixer_control *mc = |
| (struct soc_mixer_control *)kcontrol->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; |
| unsigned int val; |
| int connect, change; |
| struct snd_soc_dapm_update update; |
| int wi; |
| |
| val = (ucontrol->value.integer.value[0] & mask); |
| |
| if (invert) |
| val = max - val; |
| mask = mask << shift; |
| val = val << shift; |
| |
| if (val) |
| /* new connection */ |
| connect = invert ? 0 : 1; |
| else |
| /* old connection must be powered down */ |
| connect = invert ? 1 : 0; |
| |
| mutex_lock(&codec->mutex); |
| |
| change = snd_soc_test_bits(widget->codec, reg, mask, val); |
| if (change) { |
| for (wi = 0; wi < wlist->num_widgets; wi++) { |
| widget = wlist->widgets[wi]; |
| |
| widget->value = val; |
| |
| update.kcontrol = kcontrol; |
| update.widget = widget; |
| update.reg = reg; |
| update.mask = mask; |
| update.val = val; |
| widget->dapm->update = &update; |
| |
| dapm_mixer_update_power(widget, kcontrol, connect); |
| |
| widget->dapm->update = NULL; |
| } |
| } |
| |
| mutex_unlock(&codec->mutex); |
| return 0; |
| } |
| 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| struct snd_soc_codec *codec = widget->codec; |
| struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| unsigned int val, mux, change; |
| unsigned int mask, bitmask; |
| struct snd_soc_dapm_update update; |
| int wi; |
| |
| 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(&codec->mutex); |
| |
| change = snd_soc_test_bits(widget->codec, e->reg, mask, val); |
| if (change) { |
| for (wi = 0; wi < wlist->num_widgets; wi++) { |
| widget = wlist->widgets[wi]; |
| |
| widget->value = val; |
| |
| update.kcontrol = kcontrol; |
| update.widget = widget; |
| update.reg = e->reg; |
| update.mask = mask; |
| update.val = val; |
| widget->dapm->update = &update; |
| |
| dapm_mux_update_power(widget, kcontrol, change, mux, e); |
| |
| widget->dapm->update = NULL; |
| } |
| } |
| |
| mutex_unlock(&codec->mutex); |
| return change; |
| } |
| 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| |
| 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| struct snd_soc_codec *codec = widget->codec; |
| struct soc_enum *e = |
| (struct soc_enum *)kcontrol->private_value; |
| int change; |
| int ret = 0; |
| int wi; |
| |
| if (ucontrol->value.enumerated.item[0] >= e->max) |
| return -EINVAL; |
| |
| mutex_lock(&codec->mutex); |
| |
| change = widget->value != ucontrol->value.enumerated.item[0]; |
| if (change) { |
| for (wi = 0; wi < wlist->num_widgets; wi++) { |
| widget = wlist->widgets[wi]; |
| |
| widget->value = ucontrol->value.enumerated.item[0]; |
| |
| dapm_mux_update_power(widget, kcontrol, change, |
| widget->value, e); |
| } |
| } |
| |
| mutex_unlock(&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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| 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_list *wlist = snd_kcontrol_chip(kcontrol); |
| struct snd_soc_dapm_widget *widget = wlist->widgets[0]; |
| struct snd_soc_codec *codec = widget->codec; |
| struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| unsigned int val, mux, change; |
| unsigned int mask; |
| struct snd_soc_dapm_update update; |
| int wi; |
| |
| 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(&codec->mutex); |
| |
| change = snd_soc_test_bits(widget->codec, e->reg, mask, val); |
| if (change) { |
| for (wi = 0; wi < wlist->num_widgets; wi++) { |
| widget = wlist->widgets[wi]; |
| |
| widget->value = val; |
| |
| update.kcontrol = kcontrol; |
| update.widget = widget; |
| update.reg = e->reg; |
| update.mask = mask; |
| update.val = val; |
| widget->dapm->update = &update; |
| |
| dapm_mux_update_power(widget, kcontrol, change, mux, e); |
| |
| widget->dapm->update = NULL; |
| } |
| } |
| |
| mutex_unlock(&codec->mutex); |
| return change; |
| } |
| 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->dapm, 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->dapm, pin); |
| else |
| snd_soc_dapm_disable_pin(&codec->dapm, pin); |
| |
| snd_soc_dapm_sync(&codec->dapm); |
| |
| mutex_unlock(&codec->mutex); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch); |
| |
| /** |
| * snd_soc_dapm_new_control - create new dapm control |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, |
| const struct snd_soc_dapm_widget *widget) |
| { |
| struct snd_soc_dapm_widget *w; |
| size_t name_len; |
| |
| if ((w = dapm_cnew_widget(widget)) == NULL) |
| return -ENOMEM; |
| |
| name_len = strlen(widget->name) + 1; |
| if (dapm->codec && dapm->codec->name_prefix) |
| name_len += 1 + strlen(dapm->codec->name_prefix); |
| w->name = kmalloc(name_len, GFP_KERNEL); |
| if (w->name == NULL) { |
| kfree(w); |
| return -ENOMEM; |
| } |
| if (dapm->codec && dapm->codec->name_prefix) |
| snprintf(w->name, name_len, "%s %s", |
| dapm->codec->name_prefix, widget->name); |
| else |
| snprintf(w->name, name_len, "%s", widget->name); |
| |
| dapm->n_widgets++; |
| w->dapm = dapm; |
| w->codec = dapm->codec; |
| INIT_LIST_HEAD(&w->sources); |
| INIT_LIST_HEAD(&w->sinks); |
| INIT_LIST_HEAD(&w->list); |
| list_add(&w->list, &dapm->card->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 |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, |
| const struct snd_soc_dapm_widget *widget, |
| int num) |
| { |
| int i, ret; |
| |
| for (i = 0; i < num; i++) { |
| ret = snd_soc_dapm_new_control(dapm, widget); |
| if (ret < 0) { |
| dev_err(dapm->dev, |
| "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); |
| |
| static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm, |
| const char *stream, int event) |
| { |
| struct snd_soc_dapm_widget *w; |
| |
| list_for_each_entry(w, &dapm->card->widgets, list) |
| { |
| if (!w->sname || w->dapm != dapm) |
| continue; |
| dev_dbg(w->dapm->dev, "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: |
| case SND_SOC_DAPM_STREAM_RESUME: |
| case SND_SOC_DAPM_STREAM_PAUSE_PUSH: |
| case SND_SOC_DAPM_STREAM_PAUSE_RELEASE: |
| break; |
| } |
| } |
| } |
| |
| dapm_power_widgets(dapm, event); |
| } |
| |
| /** |
| * snd_soc_dapm_stream_event - send a stream event to the dapm core |
| * @rtd: PCM runtime data |
| * @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_pcm_runtime *rtd, |
| const char *stream, int event) |
| { |
| struct snd_soc_codec *codec = rtd->codec; |
| |
| if (stream == NULL) |
| return 0; |
| |
| mutex_lock(&codec->mutex); |
| soc_dapm_stream_event(&codec->dapm, stream, event); |
| mutex_unlock(&codec->mutex); |
| return 0; |
| } |
| |
| /** |
| * snd_soc_dapm_enable_pin - enable pin. |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, const char *pin) |
| { |
| return snd_soc_dapm_set_pin(dapm, pin, 1); |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin); |
| |
| /** |
| * snd_soc_dapm_force_enable_pin - force a pin to be enabled |
| * @dapm: DAPM context |
| * @pin: pin name |
| * |
| * Enables input/output pin regardless of any other state. This is |
| * intended for use with microphone bias supplies used in microphone |
| * jack detection. |
| * |
| * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to |
| * do any widget power switching. |
| */ |
| int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm, |
| const char *pin) |
| { |
| struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); |
| |
| if (!w) { |
| dev_err(dapm->dev, "dapm: unknown pin %s\n", pin); |
| return -EINVAL; |
| } |
| |
| dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin); |
| w->connected = 1; |
| w->force = 1; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin); |
| |
| /** |
| * snd_soc_dapm_disable_pin - disable pin. |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, |
| const char *pin) |
| { |
| return snd_soc_dapm_set_pin(dapm, pin, 0); |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin); |
| |
| /** |
| * snd_soc_dapm_nc_pin - permanently disable pin. |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, const char *pin) |
| { |
| return snd_soc_dapm_set_pin(dapm, pin, 0); |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin); |
| |
| /** |
| * snd_soc_dapm_get_pin_status - get audio pin status |
| * @dapm: DAPM context |
| * @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_dapm_context *dapm, |
| const char *pin) |
| { |
| struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); |
| |
| if (w) |
| return w->connected; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status); |
| |
| /** |
| * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint |
| * @dapm: DAPM context |
| * @pin: audio signal pin endpoint (or start point) |
| * |
| * Mark the given endpoint or pin as ignoring suspend. When the |
| * system is disabled a path between two endpoints flagged as ignoring |
| * suspend will not be disabled. The path must already be enabled via |
| * normal means at suspend time, it will not be turned on if it was not |
| * already enabled. |
| */ |
| int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm, |
| const char *pin) |
| { |
| struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false); |
| |
| if (!w) { |
| dev_err(dapm->dev, "dapm: unknown pin %s\n", pin); |
| return -EINVAL; |
| } |
| |
| w->ignore_suspend = 1; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend); |
| |
| /** |
| * snd_soc_dapm_free - free dapm resources |
| * @card: SoC device |
| * |
| * Free all dapm widgets and resources. |
| */ |
| void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm) |
| { |
| snd_soc_dapm_sys_remove(dapm->dev); |
| dapm_debugfs_cleanup(dapm); |
| dapm_free_widgets(dapm); |
| list_del(&dapm->list); |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dapm_free); |
| |
| static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm) |
| { |
| struct snd_soc_dapm_widget *w; |
| LIST_HEAD(down_list); |
| int powerdown = 0; |
| |
| list_for_each_entry(w, &dapm->card->widgets, list) { |
| if (w->dapm != dapm) |
| continue; |
| if (w->power) { |
| dapm_seq_insert(w, &down_list, false); |
| 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(dapm, SND_SOC_BIAS_PREPARE); |
| dapm_seq_run(dapm, &down_list, 0, false); |
| snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY); |
| } |
| } |
| |
| /* |
| * snd_soc_dapm_shutdown - callback for system shutdown |
| */ |
| void snd_soc_dapm_shutdown(struct snd_soc_card *card) |
| { |
| struct snd_soc_codec *codec; |
| |
| list_for_each_entry(codec, &card->codec_dev_list, list) { |
| soc_dapm_shutdown_codec(&codec->dapm); |
| snd_soc_dapm_set_bias_level(&codec->dapm, 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"); |