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

	if (!nopcm) {
		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");
			printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
			nopcm = 1;
		}
	}

	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(KERN_DEBUG "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.function = pcsp_do_timer;

	err = snd_card_create(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;
	}

	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)
{
	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",
		.owner	= THIS_MODULE,
		.pm	= PCSP_PM_OPS,
	},
	.probe		= pcsp_probe,
	.remove		= __devexit_p(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>
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 */
a67ff6a5 RR	28	static bool enable = SNDRV_DEFAULT_ENABLE1; /* Enable this card */
a67ff6a5 RR	29	static bool nopcm; /* Disable PCM capability of the driver */
9ab4d072 SS	30
	31	module_param(index, int, 0444);
	32	MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
	33	module_param(id, charp, 0444);
	34	MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
	35	module_param(enable, bool, 0444);
52337310	36	MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
bcc2c6b7 SS	37	module_param(nopcm, bool, 0444);
bcc2c6b7 SS	38	MODULE_PARM_DESC(nopcm, "Disable PC-Speaker PCM sound. Only beeps remain.");
9ab4d072 SS	39
	40	struct snd_pcsp pcsp_chip;
	41
	42	static int __devinit snd_pcsp_create(struct snd_card *card)
	43	{
	44	static struct snd_device_ops ops = { };
	45	struct timespec tp;
	46	int err;
	47	int div, min_div, order;
	48
bcc2c6b7 SS	49	if (!nopcm) {
	50	hrtimer_get_res(CLOCK_MONOTONIC, &tp);
	51	if (tp.tv_sec \|\| tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
	52	printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
	53	"(%linS)\n", tp.tv_nsec);
	54	printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
	55	"enabled.\n");
	56	printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
	57	nopcm = 1;
	58	}
9ab4d072 SS	59	}
	60
	61	if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
	62	min_div = MIN_DIV;
	63	else
	64	min_div = MAX_DIV;
	65	#if PCSP_DEBUG
45203832	66	printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%li\n",
9ab4d072 SS	67	loops_per_jiffy, min_div, tp.tv_nsec);
	68	#endif
	69
	70	div = MAX_DIV / min_div;
	71	order = fls(div) - 1;
	72
	73	pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
	74	pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
	75	pcsp_chip.playback_ptr = 0;
	76	pcsp_chip.period_ptr = 0;
	77	atomic_set(&pcsp_chip.timer_active, 0);
	78	pcsp_chip.enable = 1;
	79	pcsp_chip.pcspkr = 1;
	80
	81	spin_lock_init(&pcsp_chip.substream_lock);
	82
	83	pcsp_chip.card = card;
	84	pcsp_chip.port = 0x61;
	85	pcsp_chip.irq = -1;
	86	pcsp_chip.dma = -1;
	87
	88	/* Register device */
	89	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
	90	if (err < 0)
	91	return err;
	92
	93	return 0;
	94	}
	95
	96	static int __devinit snd_card_pcsp_probe(int devnum, struct device *dev)
	97	{
	98	struct snd_card *card;
	99	int err;
	100
	101	if (devnum != 0)
	102	return -EINVAL;
	103
	104	hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
9ab4d072 SS	105	pcsp_chip.timer.function = pcsp_do_timer;
9ab4d072 SS	106
bd7dd77c TI	107	err = snd_card_create(index, id, THIS_MODULE, 0, &card);
	108	if (err < 0)
	109	return err;
9ab4d072 SS	110
	111	err = snd_pcsp_create(card);
	112	if (err < 0) {
	113	snd_card_free(card);
	114	return err;
	115	}
bcc2c6b7 SS	116	if (!nopcm) {
	117	err = snd_pcsp_new_pcm(&pcsp_chip);
	118	if (err < 0) {
	119	snd_card_free(card);
	120	return err;
	121	}
9ab4d072	122	}
bcc2c6b7	123	err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
9ab4d072 SS	124	if (err < 0) {
	125	snd_card_free(card);
	126	return err;
	127	}
	128
	129	snd_card_set_dev(pcsp_chip.card, dev);
	130
	131	strcpy(card->driver, "PC-Speaker");
	132	strcpy(card->shortname, "pcsp");
	133	sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
	134	pcsp_chip.port);
	135
	136	err = snd_card_register(card);
	137	if (err < 0) {
	138	snd_card_free(card);
	139	return err;
	140	}
	141
	142	return 0;
	143	}
	144
	145	static int __devinit alsa_card_pcsp_init(struct device *dev)
	146	{
52337310 SS	147	int err;
	148
	149	err = snd_card_pcsp_probe(0, dev);
	150	if (err) {
	151	printk(KERN_ERR "PC-Speaker initialization failed.\n");
	152	return err;
	153	}
9ab4d072 SS	154
	155	#ifdef CONFIG_DEBUG_PAGEALLOC
	156	/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
efd89d9d SS	157	printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
efd89d9d SS	158	"which may make the sound noisy.\n");
9ab4d072 SS	159	#endif
9ab4d072 SS	160
9ab4d072 SS	161	return 0;
	162	}
	163
	164	static void __devexit alsa_card_pcsp_exit(struct snd_pcsp *chip)
	165	{
	166	snd_card_free(chip->card);
	167	}
	168
	169	static int __devinit pcsp_probe(struct platform_device *dev)
	170	{
	171	int err;
52337310	172
9ab4d072 SS	173	err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
	174	if (err < 0)
	175	return err;
	176
	177	err = alsa_card_pcsp_init(&dev->dev);
	178	if (err < 0) {
	179	pcspkr_input_remove(pcsp_chip.input_dev);
	180	return err;
	181	}
	182
	183	platform_set_drvdata(dev, &pcsp_chip);
	184	return 0;
	185	}
	186
	187	static int __devexit pcsp_remove(struct platform_device *dev)
	188	{
	189	struct snd_pcsp *chip = platform_get_drvdata(dev);
	190	alsa_card_pcsp_exit(chip);
	191	pcspkr_input_remove(chip->input_dev);
	192	platform_set_drvdata(dev, NULL);
	193	return 0;
	194	}
	195
	196	static void pcsp_stop_beep(struct snd_pcsp *chip)
	197	{
96c7d478 TI	198	pcsp_sync_stop(chip);
96c7d478 TI	199	pcspkr_stop_sound();
9ab4d072 SS	200	}
9ab4d072 SS	201
d34e4e00	202	#ifdef CONFIG_PM_SLEEP
284e7ca7	203	static int pcsp_suspend(struct device *dev)
9ab4d072	204	{
284e7ca7	205	struct snd_pcsp *chip = dev_get_drvdata(dev);
9ab4d072 SS	206	pcsp_stop_beep(chip);
	207	snd_pcm_suspend_all(chip->pcm);
	208	return 0;
	209	}
284e7ca7 TI	210
	211	static SIMPLE_DEV_PM_OPS(pcsp_pm, pcsp_suspend, NULL);
	212	#define PCSP_PM_OPS &pcsp_pm
983e0972	213	#else
284e7ca7	214	#define PCSP_PM_OPS NULL
d34e4e00	215	#endif /* CONFIG_PM_SLEEP */
9ab4d072 SS	216
	217	static void pcsp_shutdown(struct platform_device *dev)
	218	{
	219	struct snd_pcsp *chip = platform_get_drvdata(dev);
	220	pcsp_stop_beep(chip);
	221	}
	222
	223	static struct platform_driver pcsp_platform_driver = {
	224	.driver = {
	225	.name = "pcspkr",
	226	.owner = THIS_MODULE,
284e7ca7	227	.pm = PCSP_PM_OPS,
9ab4d072 SS	228	},
	229	.probe = pcsp_probe,
	230	.remove = __devexit_p(pcsp_remove),
9ab4d072 SS	231	.shutdown = pcsp_shutdown,
	232	};
	233
	234	static int __init pcsp_init(void)
	235	{
52337310 SS	236	if (!enable)
52337310 SS	237	return -ENODEV;
9ab4d072 SS	238	return platform_driver_register(&pcsp_platform_driver);
	239	}
	240
	241	static void __exit pcsp_exit(void)
	242	{
	243	platform_driver_unregister(&pcsp_platform_driver);
	244	}
	245
	246	module_init(pcsp_init);
	247	module_exit(pcsp_exit);