cregit-Linux how code gets into the kernel

Release 4.8 sound/ppc/beep.c

Directory: sound/ppc
/*
 * Beep using pcm
 *
 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   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
 */

#include <linux/io.h>
#include <asm/irq.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/control.h>
#include "pmac.h"


struct pmac_beep {
	
int running;		/* boolean */
	
int volume;		/* mixer volume: 0-100 */
	
int volume_play;	/* currently playing volume */
	
int hz;
	
int nsamples;
	
short *buf;		/* allocated wave buffer */
	
dma_addr_t addr;	/* physical address of buffer */
	
struct input_dev *dev;
};

/*
 * stop beep if running
 */

void snd_pmac_beep_stop(struct snd_pmac *chip) { struct pmac_beep *beep = chip->beep; if (beep && beep->running) { beep->running = 0; snd_pmac_beep_dma_stop(chip); } }

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jaroslav kyselajaroslav kysela3690.00%150.00%
takashi iwaitakashi iwai410.00%150.00%
Total40100.00%2100.00%

/* * Stuff for outputting a beep. The values range from -327 to +327 * so we can multiply by an amplitude in the range 0..100 to get a * signed short value to put in the output buffer. */ static short beep_wform[256] = { 0, 40, 79, 117, 153, 187, 218, 245, 269, 288, 304, 316, 323, 327, 327, 324, 318, 310, 299, 288, 275, 262, 249, 236, 224, 213, 204, 196, 190, 186, 183, 182, 182, 183, 186, 189, 192, 196, 200, 203, 206, 208, 209, 209, 209, 207, 204, 201, 197, 193, 188, 183, 179, 174, 170, 166, 163, 161, 160, 159, 159, 160, 161, 162, 164, 166, 168, 169, 171, 171, 171, 170, 169, 167, 163, 159, 155, 150, 144, 139, 133, 128, 122, 117, 113, 110, 107, 105, 103, 103, 103, 103, 104, 104, 105, 105, 105, 103, 101, 97, 92, 86, 78, 68, 58, 45, 32, 18, 3, -11, -26, -41, -55, -68, -79, -88, -95, -100, -102, -102, -99, -93, -85, -75, -62, -48, -33, -16, 0, 16, 33, 48, 62, 75, 85, 93, 99, 102, 102, 100, 95, 88, 79, 68, 55, 41, 26, 11, -3, -18, -32, -45, -58, -68, -78, -86, -92, -97, -101, -103, -105, -105, -105, -104, -104, -103, -103, -103, -103, -105, -107, -110, -113, -117, -122, -128, -133, -139, -144, -150, -155, -159, -163, -167, -169, -170, -171, -171, -171, -169, -168, -166, -164, -162, -161, -160, -159, -159, -160, -161, -163, -166, -170, -174, -179, -183, -188, -193, -197, -201, -204, -207, -209, -209, -209, -208, -206, -203, -200, -196, -192, -189, -186, -183, -182, -182, -183, -186, -190, -196, -204, -213, -224, -236, -249, -262, -275, -288, -299, -310, -318, -324, -327, -327, -323, -316, -304, -288, -269, -245, -218, -187, -153, -117, -79, -40, }; #define BEEP_SRATE 22050 /* 22050 Hz sample rate */ #define BEEP_BUFLEN 512 #define BEEP_VOLUME 15 /* 0 - 100 */
static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type, unsigned int code, int hz) { struct snd_pmac *chip; struct pmac_beep *beep; unsigned long flags; int beep_speed = 0; int srate; int period, ncycles, nsamples; int i, j, f; short *p; if (type != EV_SND) return -1; switch (code) { case SND_BELL: if (hz) hz = 1000; case SND_TONE: break; default: return -1; } chip = input_get_drvdata(dev); if (! chip || (beep = chip->beep) == NULL) return -1; if (! hz) { spin_lock_irqsave(&chip->reg_lock, flags); if (beep->running) snd_pmac_beep_stop(chip); spin_unlock_irqrestore(&chip->reg_lock, flags); return 0; } beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE); srate = chip->freq_table[beep_speed]; if (hz <= srate / BEEP_BUFLEN || hz > srate / 2) hz = 1000; spin_lock_irqsave(&chip->reg_lock, flags); if (chip->playback.running || chip->capture.running || beep->running) { spin_unlock_irqrestore(&chip->reg_lock, flags); return 0; } beep->running = 1; spin_unlock_irqrestore(&chip->reg_lock, flags); if (hz == beep->hz && beep->volume == beep->volume_play) { nsamples = beep->nsamples; } else { period = srate * 256 / hz; /* fixed point */ ncycles = BEEP_BUFLEN * 256 / period; nsamples = (period * ncycles) >> 8; f = ncycles * 65536 / nsamples; j = 0; p = beep->buf; for (i = 0; i < nsamples; ++i, p += 2) { p[0] = p[1] = beep_wform[j >> 8] * beep->volume; j = (j + f) & 0xffff; } beep->hz = hz; beep->volume_play = beep->volume; beep->nsamples = nsamples; } spin_lock_irqsave(&chip->reg_lock, flags); snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed); spin_unlock_irqrestore(&chip->reg_lock, flags); return 0; }

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PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela44098.43%133.33%
takashi iwaitakashi iwai40.89%133.33%
dmitry torokhovdmitry torokhov30.67%133.33%
Total447100.00%3100.00%

/* * beep volume mixer */
static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 1; uinfo->value.integer.min = 0; uinfo->value.integer.max = 100; return 0; }

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jaroslav kyselajaroslav kysela4792.16%150.00%
takashi iwaitakashi iwai47.84%150.00%
Total51100.00%2100.00%


static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); if (snd_BUG_ON(!chip->beep)) return -ENXIO; ucontrol->value.integer.value[0] = chip->beep->volume; return 0; }

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jaroslav kyselajaroslav kysela4270.00%133.33%
takashi iwaitakashi iwai1830.00%266.67%
Total60100.00%3100.00%


static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); unsigned int oval, nval; if (snd_BUG_ON(!chip->beep)) return -ENXIO; oval = chip->beep->volume; nval = ucontrol->value.integer.value[0]; if (nval > 100) return -EINVAL; chip->beep->volume = nval; return oval != chip->beep->volume; }

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PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela5457.45%125.00%
takashi iwaitakashi iwai4042.55%375.00%
Total94100.00%4100.00%

static struct snd_kcontrol_new snd_pmac_beep_mixer = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "Beep Playback Volume", .info = snd_pmac_info_beep, .get = snd_pmac_get_beep, .put = snd_pmac_put_beep, }; /* Initialize beep stuff */
int snd_pmac_attach_beep(struct snd_pmac *chip) { struct pmac_beep *beep; struct input_dev *input_dev; struct snd_kcontrol *beep_ctl; void *dmabuf; int err = -ENOMEM; beep = kzalloc(sizeof(*beep), GFP_KERNEL); if (! beep) return -ENOMEM; dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, &beep->addr, GFP_KERNEL); input_dev = input_allocate_device(); if (! dmabuf || ! input_dev) goto fail1; /* FIXME: set more better values */ input_dev->name = "PowerMac Beep"; input_dev->phys = "powermac/beep"; input_dev->id.bustype = BUS_ADB; input_dev->id.vendor = 0x001f; input_dev->id.product = 0x0001; input_dev->id.version = 0x0100; input_dev->evbit[0] = BIT_MASK(EV_SND); input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); input_dev->event = snd_pmac_beep_event; input_dev->dev.parent = &chip->pdev->dev; input_set_drvdata(input_dev, chip); beep->dev = input_dev; beep->buf = dmabuf; beep->volume = BEEP_VOLUME; beep->running = 0; beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip); err = snd_ctl_add(chip->card, beep_ctl); if (err < 0) goto fail1; chip->beep = beep; err = input_register_device(beep->dev); if (err) goto fail2; return 0; fail2: snd_ctl_remove(chip->card, beep_ctl); fail1: input_free_device(input_dev); if (dmabuf) dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, dmabuf, beep->addr); kfree(beep); return err; }

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dmitry torokhovdmitry torokhov18456.62%342.86%
jaroslav kyselajaroslav kysela12337.85%114.29%
benjamin herrenschmidtbenjamin herrenschmidt113.38%114.29%
takashi iwaitakashi iwai41.23%114.29%
jiri slabyjiri slaby30.92%114.29%
Total325100.00%7100.00%


void snd_pmac_detach_beep(struct snd_pmac *chip) { if (chip->beep) { input_unregister_device(chip->beep->dev); dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, chip->beep->buf, chip->beep->addr); kfree(chip->beep); chip->beep = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela4669.70%133.33%
benjamin herrenschmidtbenjamin herrenschmidt1827.27%133.33%
takashi iwaitakashi iwai23.03%133.33%
Total66100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela154283.40%110.00%
dmitry torokhovdmitry torokhov18810.17%330.00%
takashi iwaitakashi iwai804.33%440.00%
benjamin herrenschmidtbenjamin herrenschmidt361.95%110.00%
jiri slabyjiri slaby30.16%110.00%
Total1849100.00%10100.00%
Directory: sound/ppc
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