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![Stas Sergeev](/assets/img/avatar_default.png)
Currently, if the high-res timers are unavailable, snd-pcsp does not initialize. People who choose it over pcspkr, loose their console beeps in that case and get annoyed. With this patch, the console beeps remain regardless of the high-res timers. Additionally, the "nopcm" modparam is added to forcibly disable the PCM capabilities of the driver. Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Takashi Iwai <tiwai@suse.de>
244 lines
5.5 KiB
C
244 lines
5.5 KiB
C
/*
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* PC-Speaker driver for Linux
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*
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* Copyright (C) 1997-2001 David Woodhouse
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* Copyright (C) 2001-2008 Stas Sergeev
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*/
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/pcm.h>
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#include <linux/input.h>
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#include <linux/delay.h>
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#include <asm/bitops.h>
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#include "pcsp_input.h"
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#include "pcsp.h"
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MODULE_AUTHOR("Stas Sergeev <stsp@users.sourceforge.net>");
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MODULE_DESCRIPTION("PC-Speaker driver");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{PC-Speaker, pcsp}}");
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MODULE_ALIAS("platform:pcspkr");
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static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
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static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
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static int enable = SNDRV_DEFAULT_ENABLE1; /* Enable this card */
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static int nopcm; /* Disable PCM capability of the driver */
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module_param(index, int, 0444);
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MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
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module_param(id, charp, 0444);
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MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
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module_param(enable, bool, 0444);
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MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
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module_param(nopcm, bool, 0444);
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MODULE_PARM_DESC(nopcm, "Disable PC-Speaker PCM sound. Only beeps remain.");
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struct snd_pcsp pcsp_chip;
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static int __devinit snd_pcsp_create(struct snd_card *card)
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{
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static struct snd_device_ops ops = { };
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struct timespec tp;
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int err;
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int div, min_div, order;
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if (!nopcm) {
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hrtimer_get_res(CLOCK_MONOTONIC, &tp);
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if (tp.tv_sec || tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
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printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
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"(%linS)\n", tp.tv_nsec);
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printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
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"enabled.\n");
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printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
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nopcm = 1;
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}
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}
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if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
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min_div = MIN_DIV;
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else
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min_div = MAX_DIV;
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#if PCSP_DEBUG
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printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%li\n",
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loops_per_jiffy, min_div, tp.tv_nsec);
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#endif
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div = MAX_DIV / min_div;
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order = fls(div) - 1;
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pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
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pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
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pcsp_chip.playback_ptr = 0;
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pcsp_chip.period_ptr = 0;
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atomic_set(&pcsp_chip.timer_active, 0);
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pcsp_chip.enable = 1;
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pcsp_chip.pcspkr = 1;
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spin_lock_init(&pcsp_chip.substream_lock);
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pcsp_chip.card = card;
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pcsp_chip.port = 0x61;
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pcsp_chip.irq = -1;
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pcsp_chip.dma = -1;
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/* Register device */
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err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
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if (err < 0)
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return err;
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return 0;
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}
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static int __devinit snd_card_pcsp_probe(int devnum, struct device *dev)
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{
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struct snd_card *card;
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int err;
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if (devnum != 0)
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return -EINVAL;
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hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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pcsp_chip.timer.function = pcsp_do_timer;
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err = snd_card_create(index, id, THIS_MODULE, 0, &card);
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if (err < 0)
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return err;
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err = snd_pcsp_create(card);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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if (!nopcm) {
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err = snd_pcsp_new_pcm(&pcsp_chip);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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}
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err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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snd_card_set_dev(pcsp_chip.card, dev);
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strcpy(card->driver, "PC-Speaker");
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strcpy(card->shortname, "pcsp");
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sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
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pcsp_chip.port);
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err = snd_card_register(card);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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return 0;
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}
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static int __devinit alsa_card_pcsp_init(struct device *dev)
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{
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int err;
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err = snd_card_pcsp_probe(0, dev);
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if (err) {
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printk(KERN_ERR "PC-Speaker initialization failed.\n");
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return err;
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}
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#ifdef CONFIG_DEBUG_PAGEALLOC
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/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
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printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
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"which may make the sound noisy.\n");
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#endif
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return 0;
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}
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static void __devexit alsa_card_pcsp_exit(struct snd_pcsp *chip)
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{
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snd_card_free(chip->card);
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}
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static int __devinit pcsp_probe(struct platform_device *dev)
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{
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int err;
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err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
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if (err < 0)
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return err;
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err = alsa_card_pcsp_init(&dev->dev);
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if (err < 0) {
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pcspkr_input_remove(pcsp_chip.input_dev);
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return err;
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}
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platform_set_drvdata(dev, &pcsp_chip);
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return 0;
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}
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static int __devexit pcsp_remove(struct platform_device *dev)
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{
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struct snd_pcsp *chip = platform_get_drvdata(dev);
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alsa_card_pcsp_exit(chip);
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pcspkr_input_remove(chip->input_dev);
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platform_set_drvdata(dev, NULL);
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return 0;
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}
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static void pcsp_stop_beep(struct snd_pcsp *chip)
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{
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pcsp_sync_stop(chip);
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pcspkr_stop_sound();
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}
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#ifdef CONFIG_PM
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static int pcsp_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct snd_pcsp *chip = platform_get_drvdata(dev);
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pcsp_stop_beep(chip);
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snd_pcm_suspend_all(chip->pcm);
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return 0;
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}
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#else
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#define pcsp_suspend NULL
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#endif /* CONFIG_PM */
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static void pcsp_shutdown(struct platform_device *dev)
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{
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struct snd_pcsp *chip = platform_get_drvdata(dev);
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pcsp_stop_beep(chip);
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}
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static struct platform_driver pcsp_platform_driver = {
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.driver = {
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.name = "pcspkr",
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.owner = THIS_MODULE,
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},
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.probe = pcsp_probe,
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.remove = __devexit_p(pcsp_remove),
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.suspend = pcsp_suspend,
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.shutdown = pcsp_shutdown,
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};
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static int __init pcsp_init(void)
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{
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if (!enable)
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return -ENODEV;
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return platform_driver_register(&pcsp_platform_driver);
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}
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static void __exit pcsp_exit(void)
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{
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platform_driver_unregister(&pcsp_platform_driver);
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}
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module_init(pcsp_init);
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module_exit(pcsp_exit);
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