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-rw-r--r--sound/ppc/beep.c275
1 files changed, 275 insertions, 0 deletions
diff --git a/sound/ppc/beep.c b/sound/ppc/beep.c
new file mode 100644
index 0000000000..bf289783ea
--- /dev/null
+++ b/sound/ppc/beep.c
@@ -0,0 +1,275 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Beep using pcm
+ *
+ * Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ */
+
+#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);
+ }
+}
+
+/*
+ * 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 const 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; break;
+ case SND_TONE: break;
+ default: return -1;
+ }
+
+ chip = input_get_drvdata(dev);
+ if (!chip)
+ return -1;
+ beep = chip->beep;
+ if (!beep)
+ 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;
+}
+
+/*
+ * 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;
+}
+
+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;
+}
+
+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;
+}
+
+static const 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;
+}
+
+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;
+ }
+}
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