mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-20 18:39:12 +00:00
dcccdd938e
Unregister the platform device again if the probe was unsuccessful. This restores the behaviour of not loading the driver on probe() failure. Signed-off-by: Rene Herman <rene.herman@keyaccess.nl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
237 lines
6.7 KiB
C
237 lines
6.7 KiB
C
/*
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* Generic driver for CS4231 chips
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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* Originally the CS4232/CS4232A driver, modified for use on CS4231 by
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* Tugrul Galatali <galatalt@stuy.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/time.h>
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#include <linux/wait.h>
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/cs4231.h>
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#include <sound/mpu401.h>
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#include <sound/initval.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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MODULE_DESCRIPTION("Generic CS4231");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{Crystal Semiconductors,CS4231}}");
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
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static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
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static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* PnP setup */
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static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* PnP setup */
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static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,11,12,15 */
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static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 9,11,12,15 */
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static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0,1,3,5,6,7 */
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static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0,1,3,5,6,7 */
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for CS4231 soundcard.");
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module_param_array(id, charp, NULL, 0444);
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MODULE_PARM_DESC(id, "ID string for CS4231 soundcard.");
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable CS4231 soundcard.");
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module_param_array(port, long, NULL, 0444);
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MODULE_PARM_DESC(port, "Port # for CS4231 driver.");
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module_param_array(mpu_port, long, NULL, 0444);
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MODULE_PARM_DESC(mpu_port, "MPU-401 port # for CS4231 driver.");
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module_param_array(irq, int, NULL, 0444);
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MODULE_PARM_DESC(irq, "IRQ # for CS4231 driver.");
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module_param_array(mpu_irq, int, NULL, 0444);
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MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for CS4231 driver.");
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module_param_array(dma1, int, NULL, 0444);
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MODULE_PARM_DESC(dma1, "DMA1 # for CS4231 driver.");
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module_param_array(dma2, int, NULL, 0444);
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MODULE_PARM_DESC(dma2, "DMA2 # for CS4231 driver.");
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static struct platform_device *devices[SNDRV_CARDS];
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static int __init snd_cs4231_probe(struct platform_device *pdev)
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{
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int dev = pdev->id;
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struct snd_card *card;
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struct snd_pcm *pcm;
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struct snd_cs4231 *chip;
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int err;
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if (port[dev] == SNDRV_AUTO_PORT) {
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snd_printk(KERN_ERR "specify port\n");
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return -EINVAL;
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}
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if (irq[dev] == SNDRV_AUTO_IRQ) {
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snd_printk(KERN_ERR "specify irq\n");
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return -EINVAL;
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}
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if (dma1[dev] == SNDRV_AUTO_DMA) {
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snd_printk(KERN_ERR "specify dma1\n");
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return -EINVAL;
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}
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card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
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if (card == NULL)
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return -ENOMEM;
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if ((err = snd_cs4231_create(card, port[dev], -1,
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irq[dev],
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dma1[dev],
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dma2[dev],
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CS4231_HW_DETECT,
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0, &chip)) < 0)
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goto _err;
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card->private_data = chip;
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if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0)
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goto _err;
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strcpy(card->driver, "CS4231");
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strcpy(card->shortname, pcm->name);
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sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
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pcm->name, chip->port, irq[dev], dma1[dev]);
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if (dma2[dev] >= 0)
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sprintf(card->longname + strlen(card->longname), "&%d", dma2[dev]);
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if ((err = snd_cs4231_mixer(chip)) < 0)
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goto _err;
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if ((err = snd_cs4231_timer(chip, 0, NULL)) < 0)
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goto _err;
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if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
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if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
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mpu_irq[dev] = -1;
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if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
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mpu_port[dev], 0,
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mpu_irq[dev],
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mpu_irq[dev] >= 0 ? SA_INTERRUPT : 0,
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NULL) < 0)
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printk(KERN_WARNING "cs4231: MPU401 not detected\n");
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}
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snd_card_set_dev(card, &pdev->dev);
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if ((err = snd_card_register(card)) < 0)
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goto _err;
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platform_set_drvdata(pdev, card);
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return 0;
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_err:
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snd_card_free(card);
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return err;
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}
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static int __devexit snd_cs4231_remove(struct platform_device *devptr)
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{
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snd_card_free(platform_get_drvdata(devptr));
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platform_set_drvdata(devptr, NULL);
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return 0;
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}
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#ifdef CONFIG_PM
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static int snd_cs4231_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct snd_card *card;
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struct snd_cs4231 *chip;
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card = platform_get_drvdata(dev);
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snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
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chip = card->private_data;
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chip->suspend(chip);
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return 0;
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}
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static int snd_cs4231_resume(struct platform_device *dev)
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{
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struct snd_card *card;
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struct snd_cs4231 *chip;
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card = platform_get_drvdata(dev);
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chip = card->private_data;
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chip->resume(chip);
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snd_power_change_state(card, SNDRV_CTL_POWER_D0);
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return 0;
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}
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#endif
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#define SND_CS4231_DRIVER "snd_cs4231"
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static struct platform_driver snd_cs4231_driver = {
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.probe = snd_cs4231_probe,
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.remove = __devexit_p(snd_cs4231_remove),
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#ifdef CONFIG_PM
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.suspend = snd_cs4231_suspend,
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.resume = snd_cs4231_resume,
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#endif
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.driver = {
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.name = SND_CS4231_DRIVER
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},
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};
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static void __init_or_module snd_cs4231_unregister_all(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(devices); ++i)
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platform_device_unregister(devices[i]);
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platform_driver_unregister(&snd_cs4231_driver);
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}
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static int __init alsa_card_cs4231_init(void)
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{
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int i, cards, err;
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err = platform_driver_register(&snd_cs4231_driver);
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if (err < 0)
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return err;
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cards = 0;
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for (i = 0; i < SNDRV_CARDS; i++) {
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struct platform_device *device;
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if (! enable[i])
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continue;
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device = platform_device_register_simple(SND_CS4231_DRIVER,
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i, NULL, 0);
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if (IS_ERR(device))
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continue;
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if (!platform_get_drvdata(device)) {
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platform_device_unregister(device);
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continue;
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}
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devices[i] = device;
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cards++;
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}
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if (!cards) {
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#ifdef MODULE
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printk(KERN_ERR "CS4231 soundcard not found or device busy\n");
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#endif
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snd_cs4231_unregister_all();
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return -ENODEV;
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}
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return 0;
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}
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static void __exit alsa_card_cs4231_exit(void)
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{
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snd_cs4231_unregister_all();
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}
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module_init(alsa_card_cs4231_init)
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module_exit(alsa_card_cs4231_exit)
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