[linux.git] / sound / ppc / beep.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Beep using pcm
 *
 * Copyright (c) by Takashi Iwai <[email protected]>
 */

#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;
	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;
}

/*
 * 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;
	}
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* Beep using pcm
	4	*
	5	* Copyright (c) by Takashi Iwai <[email protected]>
1da177e4 LT	6	*/
1da177e4 LT	7
6cbbfe1c	8	#include <linux/io.h>
1da177e4 LT	9	#include <asm/irq.h>
	10	#include <linux/init.h>
	11	#include <linux/slab.h>
	12	#include <linux/input.h>
7bbd8277 BH	13	#include <linux/pci.h>
7bbd8277 BH	14	#include <linux/dma-mapping.h>
1da177e4 LT	15	#include <sound/core.h>
	16	#include <sound/control.h>
	17	#include "pmac.h"
	18
65b29f50	19	struct pmac_beep {
5ebdcbc2 DT	20	int running; /* boolean */
5ebdcbc2 DT	21	int volume; /* mixer volume: 0-100 */
1da177e4 LT	22	int volume_play; /* currently playing volume */
	23	int hz;
	24	int nsamples;
	25	short buf; / allocated wave buffer */
7bbd8277	26	dma_addr_t addr; /* physical address of buffer */
5ebdcbc2	27	struct input_dev *dev;
1da177e4 LT	28	};
	29
	30	/*
	31	* stop beep if running
	32	*/
65b29f50	33	void snd_pmac_beep_stop(struct snd_pmac *chip)
1da177e4	34	{
65b29f50	35	struct pmac_beep *beep = chip->beep;
1da177e4 LT	36	if (beep && beep->running) {
	37	beep->running = 0;
	38	snd_pmac_beep_dma_stop(chip);
	39	}
	40	}
	41
	42	/*
	43	* Stuff for outputting a beep. The values range from -327 to +327
	44	* so we can multiply by an amplitude in the range 0..100 to get a
	45	* signed short value to put in the output buffer.
	46	*/
6e9ef32f	47	static const short beep_wform[256] = {
1da177e4 LT	48	0, 40, 79, 117, 153, 187, 218, 245,
	49	269, 288, 304, 316, 323, 327, 327, 324,
	50	318, 310, 299, 288, 275, 262, 249, 236,
	51	224, 213, 204, 196, 190, 186, 183, 182,
	52	182, 183, 186, 189, 192, 196, 200, 203,
	53	206, 208, 209, 209, 209, 207, 204, 201,
	54	197, 193, 188, 183, 179, 174, 170, 166,
	55	163, 161, 160, 159, 159, 160, 161, 162,
	56	164, 166, 168, 169, 171, 171, 171, 170,
	57	169, 167, 163, 159, 155, 150, 144, 139,
	58	133, 128, 122, 117, 113, 110, 107, 105,
	59	103, 103, 103, 103, 104, 104, 105, 105,
	60	105, 103, 101, 97, 92, 86, 78, 68,
	61	58, 45, 32, 18, 3, -11, -26, -41,
	62	-55, -68, -79, -88, -95, -100, -102, -102,
	63	-99, -93, -85, -75, -62, -48, -33, -16,
	64	0, 16, 33, 48, 62, 75, 85, 93,
	65	99, 102, 102, 100, 95, 88, 79, 68,
	66	55, 41, 26, 11, -3, -18, -32, -45,
	67	-58, -68, -78, -86, -92, -97, -101, -103,
	68	-105, -105, -105, -104, -104, -103, -103, -103,
	69	-103, -105, -107, -110, -113, -117, -122, -128,
	70	-133, -139, -144, -150, -155, -159, -163, -167,
	71	-169, -170, -171, -171, -171, -169, -168, -166,
	72	-164, -162, -161, -160, -159, -159, -160, -161,
	73	-163, -166, -170, -174, -179, -183, -188, -193,
	74	-197, -201, -204, -207, -209, -209, -209, -208,
	75	-206, -203, -200, -196, -192, -189, -186, -183,
	76	-182, -182, -183, -186, -190, -196, -204, -213,
	77	-224, -236, -249, -262, -275, -288, -299, -310,
	78	-318, -324, -327, -327, -323, -316, -304, -288,
	79	-269, -245, -218, -187, -153, -117, -79, -40,
	80	};
	81
	82	#define BEEP_SRATE 22050 /* 22050 Hz sample rate */
	83	#define BEEP_BUFLEN 512
	84	#define BEEP_VOLUME 15 /* 0 - 100 */
	85
65b29f50 TI	86	static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
65b29f50 TI	87	unsigned int code, int hz)
1da177e4	88	{
65b29f50 TI	89	struct snd_pmac *chip;
65b29f50 TI	90	struct pmac_beep *beep;
1da177e4 LT	91	unsigned long flags;
	92	int beep_speed = 0;
	93	int srate;
	94	int period, ncycles, nsamples;
	95	int i, j, f;
	96	short *p;
	97
	98	if (type != EV_SND)
	99	return -1;
	100
	101	switch (code) {
	102	case SND_BELL: if (hz) hz = 1000;
	103	case SND_TONE: break;
	104	default: return -1;
	105	}
	106
1e2831db	107	chip = input_get_drvdata(dev);
1da177e4 LT	108	if (! chip \|\| (beep = chip->beep) == NULL)
	109	return -1;
	110
	111	if (! hz) {
	112	spin_lock_irqsave(&chip->reg_lock, flags);
	113	if (beep->running)
	114	snd_pmac_beep_stop(chip);
	115	spin_unlock_irqrestore(&chip->reg_lock, flags);
	116	return 0;
	117	}
	118
	119	beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE);
	120	srate = chip->freq_table[beep_speed];
	121
	122	if (hz <= srate / BEEP_BUFLEN \|\| hz > srate / 2)
	123	hz = 1000;
	124
	125	spin_lock_irqsave(&chip->reg_lock, flags);
	126	if (chip->playback.running \|\| chip->capture.running \|\| beep->running) {
	127	spin_unlock_irqrestore(&chip->reg_lock, flags);
	128	return 0;
	129	}
	130	beep->running = 1;
	131	spin_unlock_irqrestore(&chip->reg_lock, flags);
	132
	133	if (hz == beep->hz && beep->volume == beep->volume_play) {
	134	nsamples = beep->nsamples;
	135	} else {
	136	period = srate * 256 / hz; /* fixed point */
	137	ncycles = BEEP_BUFLEN * 256 / period;
	138	nsamples = (period * ncycles) >> 8;
	139	f = ncycles * 65536 / nsamples;
	140	j = 0;
	141	p = beep->buf;
	142	for (i = 0; i < nsamples; ++i, p += 2) {
	143	p[0] = p[1] = beep_wform[j >> 8] * beep->volume;
	144	j = (j + f) & 0xffff;
	145	}
	146	beep->hz = hz;
	147	beep->volume_play = beep->volume;
	148	beep->nsamples = nsamples;
	149	}
	150
	151	spin_lock_irqsave(&chip->reg_lock, flags);
	152	snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed);
	153	spin_unlock_irqrestore(&chip->reg_lock, flags);
	154	return 0;
	155	}
	156
	157	/*
	158	* beep volume mixer
	159	*/
	160
65b29f50 TI	161	static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol,
65b29f50 TI	162	struct snd_ctl_elem_info *uinfo)
1da177e4 LT	163	{
	164	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	165	uinfo->count = 1;
	166	uinfo->value.integer.min = 0;
	167	uinfo->value.integer.max = 100;
	168	return 0;
	169	}
	170
65b29f50 TI	171	static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol,
65b29f50 TI	172	struct snd_ctl_elem_value *ucontrol)
1da177e4	173	{
65b29f50	174	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
5e246b85 TI	175	if (snd_BUG_ON(!chip->beep))
5e246b85 TI	176	return -ENXIO;
1da177e4 LT	177	ucontrol->value.integer.value[0] = chip->beep->volume;
	178	return 0;
	179	}
	180
65b29f50 TI	181	static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol,
65b29f50 TI	182	struct snd_ctl_elem_value *ucontrol)
1da177e4	183	{
65b29f50	184	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
d4079ac4	185	unsigned int oval, nval;
5e246b85 TI	186	if (snd_BUG_ON(!chip->beep))
5e246b85 TI	187	return -ENXIO;
1da177e4	188	oval = chip->beep->volume;
d4079ac4 TI	189	nval = ucontrol->value.integer.value[0];
	190	if (nval > 100)
	191	return -EINVAL;
	192	chip->beep->volume = nval;
1da177e4 LT	193	return oval != chip->beep->volume;
	194	}
	195
905e46ac	196	static const struct snd_kcontrol_new snd_pmac_beep_mixer = {
1da177e4 LT	197	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	198	.name = "Beep Playback Volume",
	199	.info = snd_pmac_info_beep,
	200	.get = snd_pmac_get_beep,
	201	.put = snd_pmac_put_beep,
	202	};
	203
	204	/* Initialize beep stuff */
15afafc2	205	int snd_pmac_attach_beep(struct snd_pmac *chip)
1da177e4	206	{
65b29f50	207	struct pmac_beep *beep;
5ebdcbc2	208	struct input_dev *input_dev;
f03d68fe	209	struct snd_kcontrol *beep_ctl;
5ebdcbc2 DT	210	void *dmabuf;
5ebdcbc2 DT	211	int err = -ENOMEM;
1da177e4	212
5ebdcbc2	213	beep = kzalloc(sizeof(*beep), GFP_KERNEL);
f03d68fe DT	214	if (! beep)
f03d68fe DT	215	return -ENOMEM;
5ebdcbc2 DT	216	dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
	217	&beep->addr, GFP_KERNEL);
	218	input_dev = input_allocate_device();
f03d68fe DT	219	if (! dmabuf \|\| ! input_dev)
f03d68fe DT	220	goto fail1;
1da177e4 LT	221
1da177e4 LT	222	/* FIXME: set more better values */
5ebdcbc2 DT	223	input_dev->name = "PowerMac Beep";
	224	input_dev->phys = "powermac/beep";
	225	input_dev->id.bustype = BUS_ADB;
	226	input_dev->id.vendor = 0x001f;
	227	input_dev->id.product = 0x0001;
	228	input_dev->id.version = 0x0100;
	229
7b19ada2 JS	230	input_dev->evbit[0] = BIT_MASK(EV_SND);
7b19ada2 JS	231	input_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
5ebdcbc2	232	input_dev->event = snd_pmac_beep_event;
1e2831db DT	233	input_dev->dev.parent = &chip->pdev->dev;
1e2831db DT	234	input_set_drvdata(input_dev, chip);
1da177e4	235
5ebdcbc2 DT	236	beep->dev = input_dev;
5ebdcbc2 DT	237	beep->buf = dmabuf;
1da177e4 LT	238	beep->volume = BEEP_VOLUME;
1da177e4 LT	239	beep->running = 0;
5ebdcbc2	240
f03d68fe DT	241	beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip);
f03d68fe DT	242	err = snd_ctl_add(chip->card, beep_ctl);
5ebdcbc2	243	if (err < 0)
f03d68fe	244	goto fail1;
1e2831db DT	245
1e2831db DT	246	chip->beep = beep;
1da177e4	247
f03d68fe DT	248	err = input_register_device(beep->dev);
	249	if (err)
	250	goto fail2;
	251
	252	return 0;
	253
	254	fail2: snd_ctl_remove(chip->card, beep_ctl);
	255	fail1: input_free_device(input_dev);
	256	if (dmabuf)
	257	dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
	258	dmabuf, beep->addr);
5ebdcbc2 DT	259	kfree(beep);
5ebdcbc2 DT	260	return err;
1da177e4 LT	261	}
1da177e4 LT	262
65b29f50	263	void snd_pmac_detach_beep(struct snd_pmac *chip)
1da177e4 LT	264	{
1da177e4 LT	265	if (chip->beep) {
5ebdcbc2	266	input_unregister_device(chip->beep->dev);
7bbd8277 BH	267	dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
7bbd8277 BH	268	chip->beep->buf, chip->beep->addr);
1da177e4 LT	269	kfree(chip->beep);
	270	chip->beep = NULL;
	271	}
	272	}