[linux-2.6-block.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 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 (!nopcm) {
		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 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;
	}

#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 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>
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
fbbb01a1	42	static int snd_pcsp_create(struct snd_card *card)
9ab4d072 SS	43	{
	44	static struct snd_device_ops ops = { };
	45	struct timespec tp;
	46	int err;
	47	int div, min_div, order;
	48
75415df8 TI	49	hrtimer_get_res(CLOCK_MONOTONIC, &tp);
75415df8 TI	50
bcc2c6b7	51	if (!nopcm) {
bcc2c6b7 SS	52	if (tp.tv_sec \|\| tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
	53	printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
	54	"(%linS)\n", tp.tv_nsec);
	55	printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
	56	"enabled.\n");
	57	printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
	58	nopcm = 1;
	59	}
9ab4d072 SS	60	}
	61
	62	if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
	63	min_div = MIN_DIV;
	64	else
	65	min_div = MAX_DIV;
	66	#if PCSP_DEBUG
45203832	67	printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%li\n",
9ab4d072 SS	68	loops_per_jiffy, min_div, tp.tv_nsec);
	69	#endif
	70
	71	div = MAX_DIV / min_div;
	72	order = fls(div) - 1;
	73
	74	pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
	75	pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
	76	pcsp_chip.playback_ptr = 0;
	77	pcsp_chip.period_ptr = 0;
	78	atomic_set(&pcsp_chip.timer_active, 0);
	79	pcsp_chip.enable = 1;
	80	pcsp_chip.pcspkr = 1;
	81
	82	spin_lock_init(&pcsp_chip.substream_lock);
	83
	84	pcsp_chip.card = card;
	85	pcsp_chip.port = 0x61;
	86	pcsp_chip.irq = -1;
	87	pcsp_chip.dma = -1;
	88
	89	/* Register device */
	90	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
	91	if (err < 0)
	92	return err;
	93
	94	return 0;
	95	}
	96
fbbb01a1	97	static int snd_card_pcsp_probe(int devnum, struct device *dev)
9ab4d072 SS	98	{
	99	struct snd_card *card;
	100	int err;
	101
	102	if (devnum != 0)
	103	return -EINVAL;
	104
	105	hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
9ab4d072 SS	106	pcsp_chip.timer.function = pcsp_do_timer;
9ab4d072 SS	107
5872f3f6	108	err = snd_card_new(dev, index, id, THIS_MODULE, 0, &card);
bd7dd77c TI	109	if (err < 0)
bd7dd77c TI	110	return err;
9ab4d072 SS	111
	112	err = snd_pcsp_create(card);
	113	if (err < 0) {
	114	snd_card_free(card);
	115	return err;
	116	}
bcc2c6b7 SS	117	if (!nopcm) {
	118	err = snd_pcsp_new_pcm(&pcsp_chip);
	119	if (err < 0) {
	120	snd_card_free(card);
	121	return err;
	122	}
9ab4d072	123	}
bcc2c6b7	124	err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
9ab4d072 SS	125	if (err < 0) {
	126	snd_card_free(card);
	127	return err;
	128	}
	129
9ab4d072 SS	130	strcpy(card->driver, "PC-Speaker");
	131	strcpy(card->shortname, "pcsp");
	132	sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
	133	pcsp_chip.port);
	134
	135	err = snd_card_register(card);
	136	if (err < 0) {
	137	snd_card_free(card);
	138	return err;
	139	}
	140
	141	return 0;
	142	}
	143
fbbb01a1	144	static int alsa_card_pcsp_init(struct device *dev)
9ab4d072	145	{
52337310 SS	146	int err;
	147
	148	err = snd_card_pcsp_probe(0, dev);
	149	if (err) {
	150	printk(KERN_ERR "PC-Speaker initialization failed.\n");
	151	return err;
	152	}
9ab4d072 SS	153
	154	#ifdef CONFIG_DEBUG_PAGEALLOC
	155	/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
efd89d9d SS	156	printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
efd89d9d SS	157	"which may make the sound noisy.\n");
9ab4d072 SS	158	#endif
9ab4d072 SS	159
9ab4d072 SS	160	return 0;
	161	}
	162
fbbb01a1	163	static void alsa_card_pcsp_exit(struct snd_pcsp *chip)
9ab4d072 SS	164	{
	165	snd_card_free(chip->card);
	166	}
	167
fbbb01a1	168	static int pcsp_probe(struct platform_device *dev)
9ab4d072 SS	169	{
9ab4d072 SS	170	int err;
52337310	171
9ab4d072 SS	172	err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
	173	if (err < 0)
	174	return err;
	175
	176	err = alsa_card_pcsp_init(&dev->dev);
	177	if (err < 0) {
	178	pcspkr_input_remove(pcsp_chip.input_dev);
	179	return err;
	180	}
	181
	182	platform_set_drvdata(dev, &pcsp_chip);
	183	return 0;
	184	}
	185
fbbb01a1	186	static int pcsp_remove(struct platform_device *dev)
9ab4d072 SS	187	{
9ab4d072 SS	188	struct snd_pcsp *chip = platform_get_drvdata(dev);
9ab4d072	189	pcspkr_input_remove(chip->input_dev);
6408eac2	190	alsa_card_pcsp_exit(chip);
9ab4d072 SS	191	return 0;
	192	}
	193
	194	static void pcsp_stop_beep(struct snd_pcsp *chip)
	195	{
96c7d478 TI	196	pcsp_sync_stop(chip);
96c7d478 TI	197	pcspkr_stop_sound();
9ab4d072 SS	198	}
9ab4d072 SS	199
d34e4e00	200	#ifdef CONFIG_PM_SLEEP
284e7ca7	201	static int pcsp_suspend(struct device *dev)
9ab4d072	202	{
284e7ca7	203	struct snd_pcsp *chip = dev_get_drvdata(dev);
9ab4d072 SS	204	pcsp_stop_beep(chip);
	205	snd_pcm_suspend_all(chip->pcm);
	206	return 0;
	207	}
284e7ca7 TI	208
	209	static SIMPLE_DEV_PM_OPS(pcsp_pm, pcsp_suspend, NULL);
	210	#define PCSP_PM_OPS &pcsp_pm
983e0972	211	#else
284e7ca7	212	#define PCSP_PM_OPS NULL
d34e4e00	213	#endif /* CONFIG_PM_SLEEP */
9ab4d072 SS	214
	215	static void pcsp_shutdown(struct platform_device *dev)
	216	{
	217	struct snd_pcsp *chip = platform_get_drvdata(dev);
	218	pcsp_stop_beep(chip);
	219	}
	220
	221	static struct platform_driver pcsp_platform_driver = {
	222	.driver = {
	223	.name = "pcspkr",
284e7ca7	224	.pm = PCSP_PM_OPS,
9ab4d072 SS	225	},
9ab4d072 SS	226	.probe = pcsp_probe,
fbbb01a1	227	.remove = pcsp_remove,
9ab4d072 SS	228	.shutdown = pcsp_shutdown,
	229	};
	230
	231	static int __init pcsp_init(void)
	232	{
52337310 SS	233	if (!enable)
52337310 SS	234	return -ENODEV;
9ab4d072 SS	235	return platform_driver_register(&pcsp_platform_driver);
	236	}
	237
	238	static void __exit pcsp_exit(void)
	239	{
	240	platform_driver_unregister(&pcsp_platform_driver);
	241	}
	242
	243	module_init(pcsp_init);
	244	module_exit(pcsp_exit);