[deliverable/linux.git] / sound / drivers / pcsp / pcsp.c

/*
 * PC-Speaker driver for Linux
 *
 * Copyright (C) 1997-2001  David Woodhouse
 * Copyright (C) 2001-2008  Stas Sergeev
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/mm.h>
#include "pcsp_input.h"
#include "pcsp.h"

MODULE_AUTHOR("Stas Sergeev <stsp@users.sourceforge.net>");
MODULE_DESCRIPTION("PC-Speaker driver");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{PC-Speaker, pcsp}}");
MODULE_ALIAS("platform:pcspkr");

static int index = SNDRV_DEFAULT_IDX1;	/* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1;	/* ID for this card */
static bool enable = SNDRV_DEFAULT_ENABLE1;	/* Enable this card */
static bool nopcm;	/* Disable PCM capability of the driver */

module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
module_param(enable, bool, 0444);
MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
module_param(nopcm, bool, 0444);
MODULE_PARM_DESC(nopcm, "Disable PC-Speaker PCM sound. Only beeps remain.");

struct snd_pcsp pcsp_chip;

static int snd_pcsp_create(struct snd_card *card)
{
	static struct snd_device_ops ops = { };
	unsigned int resolution = hrtimer_resolution;
	int err, div, min_div, order;

	if (!nopcm) {
		if (resolution > PCSP_MAX_PERIOD_NS) {
			printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
				"(%unS)\n", resolution);
			printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
				"enabled.\n");
			printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
			nopcm = 1;
		}
	}

	if (loops_per_jiffy >= PCSP_MIN_LPJ && resolution <= PCSP_MIN_PERIOD_NS)
		min_div = MIN_DIV;
	else
		min_div = MAX_DIV;
#if PCSP_DEBUG
	printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%u\n",
	       loops_per_jiffy, min_div, resolution);
#endif

	div = MAX_DIV / min_div;
	order = fls(div) - 1;

	pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
	pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
	pcsp_chip.playback_ptr = 0;
	pcsp_chip.period_ptr = 0;
	atomic_set(&pcsp_chip.timer_active, 0);
	pcsp_chip.enable = 1;
	pcsp_chip.pcspkr = 1;

	spin_lock_init(&pcsp_chip.substream_lock);

	pcsp_chip.card = card;
	pcsp_chip.port = 0x61;
	pcsp_chip.irq = -1;
	pcsp_chip.dma = -1;

	/* Register device */
	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
	if (err < 0)
		return err;

	return 0;
}

static int snd_card_pcsp_probe(int devnum, struct device *dev)
{
	struct snd_card *card;
	int err;

	if (devnum != 0)
		return -EINVAL;

	hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	pcsp_chip.timer.function = pcsp_do_timer;

	err = snd_card_new(dev, index, id, THIS_MODULE, 0, &card);
	if (err < 0)
		return err;

	err = snd_pcsp_create(card);
	if (err < 0) {
		snd_card_free(card);
		return err;
	}
	if (!nopcm) {
		err = snd_pcsp_new_pcm(&pcsp_chip);
		if (err < 0) {
			snd_card_free(card);
			return err;
		}
	}
	err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
	if (err < 0) {
		snd_card_free(card);
		return err;
	}

	strcpy(card->driver, "PC-Speaker");
	strcpy(card->shortname, "pcsp");
	sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
		pcsp_chip.port);

	err = snd_card_register(card);
	if (err < 0) {
		snd_card_free(card);
		return err;
	}

	return 0;
}

static int alsa_card_pcsp_init(struct device *dev)
{
	int err;

	err = snd_card_pcsp_probe(0, dev);
	if (err) {
		printk(KERN_ERR "PC-Speaker initialization failed.\n");
		return err;
	}

	/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
	if (debug_pagealloc_enabled()) {
		printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
		       "which may make the sound noisy.\n");
	}

	return 0;
}

static void alsa_card_pcsp_exit(struct snd_pcsp *chip)
{
	snd_card_free(chip->card);
}

static int pcsp_probe(struct platform_device *dev)
{
	int err;

	err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
	if (err < 0)
		return err;

	err = alsa_card_pcsp_init(&dev->dev);
	if (err < 0) {
		pcspkr_input_remove(pcsp_chip.input_dev);
		return err;
	}

	platform_set_drvdata(dev, &pcsp_chip);
	return 0;
}

static int pcsp_remove(struct platform_device *dev)
{
	struct snd_pcsp *chip = platform_get_drvdata(dev);
	pcspkr_input_remove(chip->input_dev);
	alsa_card_pcsp_exit(chip);
	return 0;
}

static void pcsp_stop_beep(struct snd_pcsp *chip)
{
	pcsp_sync_stop(chip);
	pcspkr_stop_sound();
}

#ifdef CONFIG_PM_SLEEP
static int pcsp_suspend(struct device *dev)
{
	struct snd_pcsp *chip = dev_get_drvdata(dev);
	pcsp_stop_beep(chip);
	snd_pcm_suspend_all(chip->pcm);
	return 0;
}

static SIMPLE_DEV_PM_OPS(pcsp_pm, pcsp_suspend, NULL);
#define PCSP_PM_OPS	&pcsp_pm
#else
#define PCSP_PM_OPS	NULL
#endif	/* CONFIG_PM_SLEEP */

static void pcsp_shutdown(struct platform_device *dev)
{
	struct snd_pcsp *chip = platform_get_drvdata(dev);
	pcsp_stop_beep(chip);
}

static struct platform_driver pcsp_platform_driver = {
	.driver		= {
		.name	= "pcspkr",
		.pm	= PCSP_PM_OPS,
	},
	.probe		= pcsp_probe,
	.remove		= pcsp_remove,
	.shutdown	= pcsp_shutdown,
};

static int __init pcsp_init(void)
{
	if (!enable)
		return -ENODEV;
	return platform_driver_register(&pcsp_platform_driver);
}

static void __exit pcsp_exit(void)
{
	platform_driver_unregister(&pcsp_platform_driver);
}

module_init(pcsp_init);
module_exit(pcsp_exit);
Commit	Line	Data
9ab4d072 SS	1	/*
	2	* PC-Speaker driver for Linux
	3	*
	4	* Copyright (C) 1997-2001 David Woodhouse
	5	* Copyright (C) 2001-2008 Stas Sergeev
	6	*/
	7
	8	#include <linux/init.h>
65a77217	9	#include <linux/module.h>
9ab4d072 SS	10	#include <linux/platform_device.h>
	11	#include <sound/core.h>
	12	#include <sound/initval.h>
	13	#include <sound/pcm.h>
9ab4d072	14	#include <linux/input.h>
9ecaedae	15	#include <linux/delay.h>
976412fb	16	#include <linux/bitops.h>
505f6d22	17	#include <linux/mm.h>
9ab4d072 SS	18	#include "pcsp_input.h"
	19	#include "pcsp.h"
	20
	21	MODULE_AUTHOR("Stas Sergeev <stsp@users.sourceforge.net>");
	22	MODULE_DESCRIPTION("PC-Speaker driver");
	23	MODULE_LICENSE("GPL");
	24	MODULE_SUPPORTED_DEVICE("{{PC-Speaker, pcsp}}");
	25	MODULE_ALIAS("platform:pcspkr");
	26
	27	static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
	28	static char id = SNDRV_DEFAULT_STR1; / ID for this card */
a67ff6a5 RR	29	static bool enable = SNDRV_DEFAULT_ENABLE1; /* Enable this card */
a67ff6a5 RR	30	static bool nopcm; /* Disable PCM capability of the driver */
9ab4d072 SS	31
	32	module_param(index, int, 0444);
	33	MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
	34	module_param(id, charp, 0444);
	35	MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
	36	module_param(enable, bool, 0444);
52337310	37	MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
bcc2c6b7 SS	38	module_param(nopcm, bool, 0444);
bcc2c6b7 SS	39	MODULE_PARM_DESC(nopcm, "Disable PC-Speaker PCM sound. Only beeps remain.");
9ab4d072 SS	40
	41	struct snd_pcsp pcsp_chip;
	42
fbbb01a1	43	static int snd_pcsp_create(struct snd_card *card)
9ab4d072 SS	44	{
9ab4d072 SS	45	static struct snd_device_ops ops = { };
447fbbdc TG	46	unsigned int resolution = hrtimer_resolution;
447fbbdc TG	47	int err, div, min_div, order;
75415df8	48
bcc2c6b7	49	if (!nopcm) {
447fbbdc	50	if (resolution > PCSP_MAX_PERIOD_NS) {
bcc2c6b7	51	printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
c78c8818	52	"(%unS)\n", resolution);
bcc2c6b7 SS	53	printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
	54	"enabled.\n");
	55	printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
	56	nopcm = 1;
	57	}
9ab4d072 SS	58	}
9ab4d072 SS	59
447fbbdc	60	if (loops_per_jiffy >= PCSP_MIN_LPJ && resolution <= PCSP_MIN_PERIOD_NS)
9ab4d072 SS	61	min_div = MIN_DIV;
	62	else
	63	min_div = MAX_DIV;
	64	#if PCSP_DEBUG
c78c8818	65	printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%u\n",
447fbbdc	66	loops_per_jiffy, min_div, resolution);
9ab4d072 SS	67	#endif
	68
	69	div = MAX_DIV / min_div;
	70	order = fls(div) - 1;
	71
	72	pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
	73	pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
	74	pcsp_chip.playback_ptr = 0;
	75	pcsp_chip.period_ptr = 0;
	76	atomic_set(&pcsp_chip.timer_active, 0);
	77	pcsp_chip.enable = 1;
	78	pcsp_chip.pcspkr = 1;
	79
	80	spin_lock_init(&pcsp_chip.substream_lock);
	81
	82	pcsp_chip.card = card;
	83	pcsp_chip.port = 0x61;
	84	pcsp_chip.irq = -1;
	85	pcsp_chip.dma = -1;
	86
	87	/* Register device */
	88	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
	89	if (err < 0)
	90	return err;
	91
	92	return 0;
	93	}
	94
fbbb01a1	95	static int snd_card_pcsp_probe(int devnum, struct device *dev)
9ab4d072 SS	96	{
	97	struct snd_card *card;
	98	int err;
	99
	100	if (devnum != 0)
	101	return -EINVAL;
	102
	103	hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
9ab4d072 SS	104	pcsp_chip.timer.function = pcsp_do_timer;
9ab4d072 SS	105
5872f3f6	106	err = snd_card_new(dev, index, id, THIS_MODULE, 0, &card);
bd7dd77c TI	107	if (err < 0)
bd7dd77c TI	108	return err;
9ab4d072 SS	109
	110	err = snd_pcsp_create(card);
	111	if (err < 0) {
	112	snd_card_free(card);
	113	return err;
	114	}
bcc2c6b7 SS	115	if (!nopcm) {
	116	err = snd_pcsp_new_pcm(&pcsp_chip);
	117	if (err < 0) {
	118	snd_card_free(card);
	119	return err;
	120	}
9ab4d072	121	}
bcc2c6b7	122	err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
9ab4d072 SS	123	if (err < 0) {
	124	snd_card_free(card);
	125	return err;
	126	}
	127
9ab4d072 SS	128	strcpy(card->driver, "PC-Speaker");
	129	strcpy(card->shortname, "pcsp");
	130	sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
	131	pcsp_chip.port);
	132
	133	err = snd_card_register(card);
	134	if (err < 0) {
	135	snd_card_free(card);
	136	return err;
	137	}
	138
	139	return 0;
	140	}
	141
fbbb01a1	142	static int alsa_card_pcsp_init(struct device *dev)
9ab4d072	143	{
52337310 SS	144	int err;
	145
	146	err = snd_card_pcsp_probe(0, dev);
	147	if (err) {
	148	printk(KERN_ERR "PC-Speaker initialization failed.\n");
	149	return err;
	150	}
9ab4d072	151
9ab4d072	152	/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
505f6d22 JK	153	if (debug_pagealloc_enabled()) {
	154	printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
	155	"which may make the sound noisy.\n");
	156	}
9ab4d072	157
9ab4d072 SS	158	return 0;
	159	}
	160
fbbb01a1	161	static void alsa_card_pcsp_exit(struct snd_pcsp *chip)
9ab4d072 SS	162	{
	163	snd_card_free(chip->card);
	164	}
	165
fbbb01a1	166	static int pcsp_probe(struct platform_device *dev)
9ab4d072 SS	167	{
9ab4d072 SS	168	int err;
52337310	169
9ab4d072 SS	170	err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
	171	if (err < 0)
	172	return err;
	173
	174	err = alsa_card_pcsp_init(&dev->dev);
	175	if (err < 0) {
	176	pcspkr_input_remove(pcsp_chip.input_dev);
	177	return err;
	178	}
	179
	180	platform_set_drvdata(dev, &pcsp_chip);
	181	return 0;
	182	}
	183
fbbb01a1	184	static int pcsp_remove(struct platform_device *dev)
9ab4d072 SS	185	{
9ab4d072 SS	186	struct snd_pcsp *chip = platform_get_drvdata(dev);
9ab4d072	187	pcspkr_input_remove(chip->input_dev);
6408eac2	188	alsa_card_pcsp_exit(chip);
9ab4d072 SS	189	return 0;
	190	}
	191
	192	static void pcsp_stop_beep(struct snd_pcsp *chip)
	193	{
96c7d478 TI	194	pcsp_sync_stop(chip);
96c7d478 TI	195	pcspkr_stop_sound();
9ab4d072 SS	196	}
9ab4d072 SS	197
d34e4e00	198	#ifdef CONFIG_PM_SLEEP
284e7ca7	199	static int pcsp_suspend(struct device *dev)
9ab4d072	200	{
284e7ca7	201	struct snd_pcsp *chip = dev_get_drvdata(dev);
9ab4d072 SS	202	pcsp_stop_beep(chip);
	203	snd_pcm_suspend_all(chip->pcm);
	204	return 0;
	205	}
284e7ca7 TI	206
	207	static SIMPLE_DEV_PM_OPS(pcsp_pm, pcsp_suspend, NULL);
	208	#define PCSP_PM_OPS &pcsp_pm
983e0972	209	#else
284e7ca7	210	#define PCSP_PM_OPS NULL
d34e4e00	211	#endif /* CONFIG_PM_SLEEP */
9ab4d072 SS	212
	213	static void pcsp_shutdown(struct platform_device *dev)
	214	{
	215	struct snd_pcsp *chip = platform_get_drvdata(dev);
	216	pcsp_stop_beep(chip);
	217	}
	218
	219	static struct platform_driver pcsp_platform_driver = {
	220	.driver = {
	221	.name = "pcspkr",
284e7ca7	222	.pm = PCSP_PM_OPS,
9ab4d072 SS	223	},
9ab4d072 SS	224	.probe = pcsp_probe,
fbbb01a1	225	.remove = pcsp_remove,
9ab4d072 SS	226	.shutdown = pcsp_shutdown,
	227	};
	228
	229	static int __init pcsp_init(void)
	230	{
52337310 SS	231	if (!enable)
52337310 SS	232	return -ENODEV;
9ab4d072 SS	233	return platform_driver_register(&pcsp_platform_driver);
	234	}
	235
	236	static void __exit pcsp_exit(void)
	237	{
	238	platform_driver_unregister(&pcsp_platform_driver);
	239	}
	240
	241	module_init(pcsp_init);
	242	module_exit(pcsp_exit);