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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
272 lines
7.1 KiB
C
272 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Beep using pcm
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*
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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*/
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#include <linux/io.h>
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#include <asm/irq.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include "pmac.h"
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struct pmac_beep {
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int running; /* boolean */
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int volume; /* mixer volume: 0-100 */
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int volume_play; /* currently playing volume */
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int hz;
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int nsamples;
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short *buf; /* allocated wave buffer */
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dma_addr_t addr; /* physical address of buffer */
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struct input_dev *dev;
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};
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/*
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* stop beep if running
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*/
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void snd_pmac_beep_stop(struct snd_pmac *chip)
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{
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struct pmac_beep *beep = chip->beep;
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if (beep && beep->running) {
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beep->running = 0;
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snd_pmac_beep_dma_stop(chip);
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}
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}
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/*
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* Stuff for outputting a beep. The values range from -327 to +327
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* so we can multiply by an amplitude in the range 0..100 to get a
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* signed short value to put in the output buffer.
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*/
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static short beep_wform[256] = {
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0, 40, 79, 117, 153, 187, 218, 245,
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269, 288, 304, 316, 323, 327, 327, 324,
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318, 310, 299, 288, 275, 262, 249, 236,
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224, 213, 204, 196, 190, 186, 183, 182,
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182, 183, 186, 189, 192, 196, 200, 203,
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206, 208, 209, 209, 209, 207, 204, 201,
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197, 193, 188, 183, 179, 174, 170, 166,
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163, 161, 160, 159, 159, 160, 161, 162,
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164, 166, 168, 169, 171, 171, 171, 170,
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169, 167, 163, 159, 155, 150, 144, 139,
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133, 128, 122, 117, 113, 110, 107, 105,
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103, 103, 103, 103, 104, 104, 105, 105,
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105, 103, 101, 97, 92, 86, 78, 68,
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58, 45, 32, 18, 3, -11, -26, -41,
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-55, -68, -79, -88, -95, -100, -102, -102,
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-99, -93, -85, -75, -62, -48, -33, -16,
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0, 16, 33, 48, 62, 75, 85, 93,
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99, 102, 102, 100, 95, 88, 79, 68,
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55, 41, 26, 11, -3, -18, -32, -45,
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-58, -68, -78, -86, -92, -97, -101, -103,
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-105, -105, -105, -104, -104, -103, -103, -103,
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-103, -105, -107, -110, -113, -117, -122, -128,
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-133, -139, -144, -150, -155, -159, -163, -167,
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-169, -170, -171, -171, -171, -169, -168, -166,
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-164, -162, -161, -160, -159, -159, -160, -161,
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-163, -166, -170, -174, -179, -183, -188, -193,
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-197, -201, -204, -207, -209, -209, -209, -208,
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-206, -203, -200, -196, -192, -189, -186, -183,
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-182, -182, -183, -186, -190, -196, -204, -213,
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-224, -236, -249, -262, -275, -288, -299, -310,
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-318, -324, -327, -327, -323, -316, -304, -288,
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-269, -245, -218, -187, -153, -117, -79, -40,
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};
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#define BEEP_SRATE 22050 /* 22050 Hz sample rate */
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#define BEEP_BUFLEN 512
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#define BEEP_VOLUME 15 /* 0 - 100 */
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static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
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unsigned int code, int hz)
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{
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struct snd_pmac *chip;
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struct pmac_beep *beep;
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unsigned long flags;
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int beep_speed = 0;
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int srate;
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int period, ncycles, nsamples;
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int i, j, f;
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short *p;
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if (type != EV_SND)
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return -1;
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switch (code) {
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case SND_BELL: if (hz) hz = 1000;
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case SND_TONE: break;
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default: return -1;
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}
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chip = input_get_drvdata(dev);
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if (! chip || (beep = chip->beep) == NULL)
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return -1;
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if (! hz) {
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spin_lock_irqsave(&chip->reg_lock, flags);
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if (beep->running)
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snd_pmac_beep_stop(chip);
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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return 0;
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}
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beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE);
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srate = chip->freq_table[beep_speed];
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if (hz <= srate / BEEP_BUFLEN || hz > srate / 2)
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hz = 1000;
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spin_lock_irqsave(&chip->reg_lock, flags);
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if (chip->playback.running || chip->capture.running || beep->running) {
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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return 0;
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}
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beep->running = 1;
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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if (hz == beep->hz && beep->volume == beep->volume_play) {
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nsamples = beep->nsamples;
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} else {
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period = srate * 256 / hz; /* fixed point */
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ncycles = BEEP_BUFLEN * 256 / period;
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nsamples = (period * ncycles) >> 8;
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f = ncycles * 65536 / nsamples;
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j = 0;
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p = beep->buf;
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for (i = 0; i < nsamples; ++i, p += 2) {
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p[0] = p[1] = beep_wform[j >> 8] * beep->volume;
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j = (j + f) & 0xffff;
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}
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beep->hz = hz;
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beep->volume_play = beep->volume;
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beep->nsamples = nsamples;
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}
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spin_lock_irqsave(&chip->reg_lock, flags);
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snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed);
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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return 0;
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}
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/*
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* beep volume mixer
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*/
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static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 100;
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return 0;
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}
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static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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if (snd_BUG_ON(!chip->beep))
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return -ENXIO;
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ucontrol->value.integer.value[0] = chip->beep->volume;
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return 0;
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}
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static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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unsigned int oval, nval;
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if (snd_BUG_ON(!chip->beep))
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return -ENXIO;
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oval = chip->beep->volume;
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nval = ucontrol->value.integer.value[0];
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if (nval > 100)
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return -EINVAL;
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chip->beep->volume = nval;
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return oval != chip->beep->volume;
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}
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static const struct snd_kcontrol_new snd_pmac_beep_mixer = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Beep Playback Volume",
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.info = snd_pmac_info_beep,
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.get = snd_pmac_get_beep,
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.put = snd_pmac_put_beep,
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};
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/* Initialize beep stuff */
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int snd_pmac_attach_beep(struct snd_pmac *chip)
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{
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struct pmac_beep *beep;
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struct input_dev *input_dev;
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struct snd_kcontrol *beep_ctl;
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void *dmabuf;
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int err = -ENOMEM;
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beep = kzalloc(sizeof(*beep), GFP_KERNEL);
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if (! beep)
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return -ENOMEM;
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dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
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&beep->addr, GFP_KERNEL);
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input_dev = input_allocate_device();
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if (! dmabuf || ! input_dev)
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goto fail1;
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/* FIXME: set more better values */
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input_dev->name = "PowerMac Beep";
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input_dev->phys = "powermac/beep";
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input_dev->id.bustype = BUS_ADB;
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input_dev->id.vendor = 0x001f;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->evbit[0] = BIT_MASK(EV_SND);
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input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
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input_dev->event = snd_pmac_beep_event;
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input_dev->dev.parent = &chip->pdev->dev;
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input_set_drvdata(input_dev, chip);
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beep->dev = input_dev;
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beep->buf = dmabuf;
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beep->volume = BEEP_VOLUME;
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beep->running = 0;
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beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip);
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err = snd_ctl_add(chip->card, beep_ctl);
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if (err < 0)
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goto fail1;
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chip->beep = beep;
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err = input_register_device(beep->dev);
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if (err)
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goto fail2;
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return 0;
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fail2: snd_ctl_remove(chip->card, beep_ctl);
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fail1: input_free_device(input_dev);
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if (dmabuf)
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dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
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dmabuf, beep->addr);
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kfree(beep);
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return err;
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}
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void snd_pmac_detach_beep(struct snd_pmac *chip)
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{
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if (chip->beep) {
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input_unregister_device(chip->beep->dev);
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dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
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chip->beep->buf, chip->beep->addr);
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kfree(chip->beep);
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chip->beep = NULL;
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}
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}
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