[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/moduleparam.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 <asm/bitops.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 int enable = SNDRV_DEFAULT_ENABLE1;	/* Enable this card */

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.");

struct snd_pcsp pcsp_chip;

static int __devinit snd_pcsp_create(struct snd_card *card)
{
	static struct snd_device_ops ops = { };
	struct timespec tp;
	int err;
	int div, min_div, order;

	hrtimer_get_res(CLOCK_MONOTONIC, &tp);
	if (tp.tv_sec || tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
		printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
		       "(%linS)\n", tp.tv_nsec);
		printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
		       "enabled.\n");
		return -EIO;
	}

	if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
		min_div = MIN_DIV;
	else
		min_div = MAX_DIV;
#if PCSP_DEBUG
	printk("PCSP: lpj=%li, min_div=%i, res=%li\n",
	       loops_per_jiffy, min_div, tp.tv_nsec);
#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 __devinit 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.cb_mode = HRTIMER_CB_SOFTIRQ;
	pcsp_chip.timer.function = pcsp_do_timer;

	card = snd_card_new(index, id, THIS_MODULE, 0);
	if (!card)
		return -ENOMEM;

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

	snd_card_set_dev(pcsp_chip.card, dev);

	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 __devinit 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;
	}

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

	return 0;
}

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

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

static void pcsp_stop_beep(struct snd_pcsp *chip)
{
	spin_lock_irq(&chip->substream_lock);
	if (!chip->playback_substream)
		pcspkr_stop_sound();
	spin_unlock_irq(&chip->substream_lock);
}

#ifdef CONFIG_PM
static int pcsp_suspend(struct platform_device *dev, pm_message_t state)
{
	struct snd_pcsp *chip = platform_get_drvdata(dev);
	pcsp_stop_beep(chip);
	snd_pcm_suspend_all(chip->pcm);
	return 0;
}
#else
#define pcsp_suspend NULL
#endif	/* CONFIG_PM */

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",
		.owner	= THIS_MODULE,
	},
	.probe		= pcsp_probe,
	.remove		= __devexit_p(pcsp_remove),
	.suspend	= pcsp_suspend,
	.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>
	9	#include <linux/moduleparam.h>
	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>
9ab4d072 SS	16	#include <asm/bitops.h>
	17	#include "pcsp_input.h"
	18	#include "pcsp.h"
	19
	20	MODULE_AUTHOR("Stas Sergeev <stsp@users.sourceforge.net>");
	21	MODULE_DESCRIPTION("PC-Speaker driver");
	22	MODULE_LICENSE("GPL");
	23	MODULE_SUPPORTED_DEVICE("{{PC-Speaker, pcsp}}");
	24	MODULE_ALIAS("platform:pcspkr");
	25
	26	static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
	27	static char id = SNDRV_DEFAULT_STR1; / ID for this card */
	28	static int enable = SNDRV_DEFAULT_ENABLE1; /* Enable this card */
	29
	30	module_param(index, int, 0444);
	31	MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
	32	module_param(id, charp, 0444);
	33	MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
	34	module_param(enable, bool, 0444);
52337310	35	MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
9ab4d072 SS	36
	37	struct snd_pcsp pcsp_chip;
	38
	39	static int __devinit snd_pcsp_create(struct snd_card *card)
	40	{
	41	static struct snd_device_ops ops = { };
	42	struct timespec tp;
	43	int err;
	44	int div, min_div, order;
	45
	46	hrtimer_get_res(CLOCK_MONOTONIC, &tp);
	47	if (tp.tv_sec \|\| tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
	48	printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
	49	"(%linS)\n", tp.tv_nsec);
	50	printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
	51	"enabled.\n");
	52	return -EIO;
	53	}
	54
	55	if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
	56	min_div = MIN_DIV;
	57	else
	58	min_div = MAX_DIV;
	59	#if PCSP_DEBUG
	60	printk("PCSP: lpj=%li, min_div=%i, res=%li\n",
	61	loops_per_jiffy, min_div, tp.tv_nsec);
	62	#endif
	63
	64	div = MAX_DIV / min_div;
	65	order = fls(div) - 1;
	66
	67	pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
	68	pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
	69	pcsp_chip.playback_ptr = 0;
	70	pcsp_chip.period_ptr = 0;
	71	atomic_set(&pcsp_chip.timer_active, 0);
	72	pcsp_chip.enable = 1;
	73	pcsp_chip.pcspkr = 1;
	74
	75	spin_lock_init(&pcsp_chip.substream_lock);
	76
	77	pcsp_chip.card = card;
	78	pcsp_chip.port = 0x61;
	79	pcsp_chip.irq = -1;
	80	pcsp_chip.dma = -1;
	81
	82	/* Register device */
	83	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
	84	if (err < 0)
	85	return err;
	86
	87	return 0;
	88	}
	89
	90	static int __devinit snd_card_pcsp_probe(int devnum, struct device *dev)
	91	{
	92	struct snd_card *card;
	93	int err;
	94
	95	if (devnum != 0)
	96	return -EINVAL;
	97
	98	hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
4b7afb0d	99	pcsp_chip.timer.cb_mode = HRTIMER_CB_SOFTIRQ;
9ab4d072 SS	100	pcsp_chip.timer.function = pcsp_do_timer;
	101
	102	card = snd_card_new(index, id, THIS_MODULE, 0);
	103	if (!card)
	104	return -ENOMEM;
	105
	106	err = snd_pcsp_create(card);
	107	if (err < 0) {
	108	snd_card_free(card);
	109	return err;
	110	}
	111	err = snd_pcsp_new_pcm(&pcsp_chip);
	112	if (err < 0) {
	113	snd_card_free(card);
	114	return err;
	115	}
	116	err = snd_pcsp_new_mixer(&pcsp_chip);
	117	if (err < 0) {
	118	snd_card_free(card);
	119	return err;
	120	}
	121
	122	snd_card_set_dev(pcsp_chip.card, dev);
	123
	124	strcpy(card->driver, "PC-Speaker");
	125	strcpy(card->shortname, "pcsp");
	126	sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
	127	pcsp_chip.port);
	128
	129	err = snd_card_register(card);
	130	if (err < 0) {
	131	snd_card_free(card);
	132	return err;
	133	}
	134
	135	return 0;
	136	}
	137
	138	static int __devinit alsa_card_pcsp_init(struct device *dev)
	139	{
52337310 SS	140	int err;
	141
	142	err = snd_card_pcsp_probe(0, dev);
	143	if (err) {
	144	printk(KERN_ERR "PC-Speaker initialization failed.\n");
	145	return err;
	146	}
9ab4d072 SS	147
	148	#ifdef CONFIG_DEBUG_PAGEALLOC
	149	/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
efd89d9d SS	150	printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
efd89d9d SS	151	"which may make the sound noisy.\n");
9ab4d072 SS	152	#endif
9ab4d072 SS	153
9ab4d072 SS	154	return 0;
	155	}
	156
	157	static void __devexit alsa_card_pcsp_exit(struct snd_pcsp *chip)
	158	{
	159	snd_card_free(chip->card);
	160	}
	161
	162	static int __devinit pcsp_probe(struct platform_device *dev)
	163	{
	164	int err;
52337310	165
9ab4d072 SS	166	err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
	167	if (err < 0)
	168	return err;
	169
	170	err = alsa_card_pcsp_init(&dev->dev);
	171	if (err < 0) {
	172	pcspkr_input_remove(pcsp_chip.input_dev);
	173	return err;
	174	}
	175
	176	platform_set_drvdata(dev, &pcsp_chip);
	177	return 0;
	178	}
	179
	180	static int __devexit pcsp_remove(struct platform_device *dev)
	181	{
	182	struct snd_pcsp *chip = platform_get_drvdata(dev);
	183	alsa_card_pcsp_exit(chip);
	184	pcspkr_input_remove(chip->input_dev);
	185	platform_set_drvdata(dev, NULL);
	186	return 0;
	187	}
	188
	189	static void pcsp_stop_beep(struct snd_pcsp *chip)
	190	{
1bc1f305	191	spin_lock_irq(&chip->substream_lock);
9ab4d072 SS	192	if (!chip->playback_substream)
9ab4d072 SS	193	pcspkr_stop_sound();
1bc1f305	194	spin_unlock_irq(&chip->substream_lock);
9ab4d072 SS	195	}
9ab4d072 SS	196
983e0972	197	#ifdef CONFIG_PM
9ab4d072 SS	198	static int pcsp_suspend(struct platform_device *dev, pm_message_t state)
	199	{
	200	struct snd_pcsp *chip = platform_get_drvdata(dev);
	201	pcsp_stop_beep(chip);
	202	snd_pcm_suspend_all(chip->pcm);
	203	return 0;
	204	}
983e0972 JFS	205	#else
	206	#define pcsp_suspend NULL
	207	#endif /* CONFIG_PM */
9ab4d072 SS	208
	209	static void pcsp_shutdown(struct platform_device *dev)
	210	{
	211	struct snd_pcsp *chip = platform_get_drvdata(dev);
	212	pcsp_stop_beep(chip);
	213	}
	214
	215	static struct platform_driver pcsp_platform_driver = {
	216	.driver = {
	217	.name = "pcspkr",
	218	.owner = THIS_MODULE,
	219	},
	220	.probe = pcsp_probe,
	221	.remove = __devexit_p(pcsp_remove),
	222	.suspend = pcsp_suspend,
	223	.shutdown = pcsp_shutdown,
	224	};
	225
	226	static int __init pcsp_init(void)
	227	{
52337310 SS	228	if (!enable)
52337310 SS	229	return -ENODEV;
9ab4d072 SS	230	return platform_driver_register(&pcsp_platform_driver);
	231	}
	232
	233	static void __exit pcsp_exit(void)
	234	{
	235	platform_driver_unregister(&pcsp_platform_driver);
	236	}
	237
	238	module_init(pcsp_init);
	239	module_exit(pcsp_exit);