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/*****************************************************************************
* Copyright 2011 Broadcom Corporation. All rights reserved.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2, available at
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a
* license other than the GPL, without Broadcom's express prior written
* consent.
*****************************************************************************/
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "bcm2835.h"
/* module parameters (see "Module Parameters") */
/* SNDRV_CARDS: maximum number of cards supported by this module */
static int index[MAX_SUBSTREAMS] = {[0 ... (MAX_SUBSTREAMS - 1)] = -1 };
static char *id[MAX_SUBSTREAMS] = {[0 ... (MAX_SUBSTREAMS - 1)] = NULL };
static int enable[MAX_SUBSTREAMS] = {[0 ... (MAX_SUBSTREAMS - 1)] = 1 };
/* HACKY global pointers needed for successive probes to work : ssp
* But compared against the changes we will have to do in VC audio_ipc code
* to export 8 audio_ipc devices as a single IPC device and then monitor all
* four devices in a thread, this gets things done quickly and should be easier
* to debug if we run into issues
*/
static struct snd_card *g_card = NULL;
static bcm2835_chip_t *g_chip = NULL;
static int snd_bcm2835_free(bcm2835_chip_t * chip)
{
kfree(chip);
return 0;
}
/* component-destructor
* (see "Management of Cards and Components")
*/
static int snd_bcm2835_dev_free(struct snd_device *device)
{
return snd_bcm2835_free(device->device_data);
}
/* chip-specific constructor
* (see "Management of Cards and Components")
*/
static int __devinit snd_bcm2835_create(struct snd_card *card,
struct platform_device *pdev,
bcm2835_chip_t ** rchip)
{
bcm2835_chip_t *chip;
int err;
static struct snd_device_ops ops = {
.dev_free = snd_bcm2835_dev_free,
};
*rchip = NULL;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->card = card;
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (err < 0) {
snd_bcm2835_free(chip);
return err;
}
*rchip = chip;
return 0;
}
static int __devinit snd_bcm2835_alsa_probe(struct platform_device *pdev)
{
static int dev;
bcm2835_chip_t *chip;
struct snd_card *card;
int err;
if (dev >= MAX_SUBSTREAMS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
if (dev > 0)
goto add_register_map;
err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &g_card);
if (err < 0)
goto out;
snd_card_set_dev(g_card, &pdev->dev);
strcpy(g_card->driver, "BRCM bcm2835 ALSA Driver");
strcpy(g_card->shortname, "bcm2835 ALSA");
sprintf(g_card->longname, "%s", g_card->shortname);
err = snd_bcm2835_create(g_card, pdev, &chip);
if (err < 0) {
printk(KERN_ERR "Failed to create bcm2835 chip\n");
goto out_bcm2835_create;
}
g_chip = chip;
err = snd_bcm2835_new_pcm(chip);
if (err < 0) {
printk(KERN_ERR "Failed to create new BCM2835 pcm device\n");
goto out_bcm2835_new_pcm;
}
err = snd_bcm2835_new_ctl(chip);
if (err < 0) {
printk(KERN_ERR "Failed to create new BCM2835 ctl\n");
goto out_bcm2835_new_ctl;
}
add_register_map:
card = g_card;
chip = g_chip;
BUG_ON(!(card && chip));
chip->avail_substreams |= (1 << dev);
chip->pdev[dev] = pdev;
if (dev == 0) {
err = snd_card_register(card);
if (err < 0) {
printk(KERN_ERR
"Failed to register bcm2835 ALSA card \n");
goto out_card_register;
}
platform_set_drvdata(pdev, card);
printk(KERN_INFO "bcm2835 ALSA card created!\n");
} else {
printk(KERN_INFO "bcm2835 ALSA chip created!\n");
platform_set_drvdata(pdev, (void *)dev);
}
dev++;
return 0;
out_card_register:
out_bcm2835_new_ctl:
out_bcm2835_new_pcm:
out_bcm2835_create:
BUG_ON(!g_card);
if (snd_card_free(g_card))
printk(KERN_ERR "Failed to free Registered alsa card\n");
g_card = NULL;
out:
dev = SNDRV_CARDS; /* stop more avail_substreams from being probed */
printk(KERN_ERR "BCM2835 ALSA Probe failed !!\n");
return err;
}
static int snd_bcm2835_alsa_remove(struct platform_device *pdev)
{
uint32_t idx;
void *drv_data;
drv_data = platform_get_drvdata(pdev);
if (drv_data == (void *)g_card) {
/* This is the card device */
snd_card_free((struct snd_card *)drv_data);
g_card = NULL;
g_chip = NULL;
} else {
idx = (uint32_t) drv_data;
if (g_card != NULL) {
BUG_ON(!g_chip);
/* We pass chip device numbers in audio ipc devices
* other than the one we registered our card with
*/
idx = (uint32_t) drv_data;
BUG_ON(!idx || idx > MAX_SUBSTREAMS);
g_chip->avail_substreams &= ~(1 << idx);
/* There should be atleast one substream registered
* after we are done here, as it wil be removed when
* the *remove* is called for the card device
*/
BUG_ON(!g_chip->avail_substreams);
}
}
platform_set_drvdata(pdev, NULL);
return 0;
}
#ifdef CONFIG_PM
static int snd_bcm2835_alsa_suspend(struct platform_device *pdev,
pm_message_t state)
{
return 0;
}
static int snd_bcm2835_alsa_resume(struct platform_device *pdev)
{
return 0;
}
#endif
static struct platform_driver bcm2835_alsa0_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD0",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa1_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD1",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa2_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD2",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa3_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD3",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa4_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD4",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa5_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD5",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa6_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD6",
.owner = THIS_MODULE,
},
};
static struct platform_driver bcm2835_alsa7_driver = {
.probe = snd_bcm2835_alsa_probe,
.remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
.name = "bcm2835_AUD7",
.owner = THIS_MODULE,
},
};
static int __devinit bcm2835_alsa_device_init(void)
{
int err;
err = platform_driver_register(&bcm2835_alsa0_driver);
if (err) {
printk("Error registering bcm2835_alsa0_driver %d .\n", err);
goto out;
}
err = platform_driver_register(&bcm2835_alsa1_driver);
if (err) {
printk("Error registering bcm2835_alsa1_driver %d .\n", err);
goto unregister_0;
}
err = platform_driver_register(&bcm2835_alsa2_driver);
if (err) {
printk("Error registering bcm2835_alsa2_driver %d .\n", err);
goto unregister_1;
}
err = platform_driver_register(&bcm2835_alsa3_driver);
if (err) {
printk("Error registering bcm2835_alsa3_driver %d .\n", err);
goto unregister_2;
}
err = platform_driver_register(&bcm2835_alsa4_driver);
if (err) {
printk("Error registering bcm2835_alsa4_driver %d .\n", err);
goto unregister_3;
}
err = platform_driver_register(&bcm2835_alsa5_driver);
if (err) {
printk("Error registering bcm2835_alsa5_driver %d .\n", err);
goto unregister_4;
}
err = platform_driver_register(&bcm2835_alsa6_driver);
if (err) {
printk("Error registering bcm2835_alsa6_driver %d .\n", err);
goto unregister_5;
}
err = platform_driver_register(&bcm2835_alsa7_driver);
if (err) {
printk("Error registering bcm2835_alsa7_driver %d .\n", err);
goto unregister_6;
}
return 0;
unregister_6:
platform_driver_unregister(&bcm2835_alsa6_driver);
unregister_5:
platform_driver_unregister(&bcm2835_alsa5_driver);
unregister_4:
platform_driver_unregister(&bcm2835_alsa4_driver);
unregister_3:
platform_driver_unregister(&bcm2835_alsa3_driver);
unregister_2:
platform_driver_unregister(&bcm2835_alsa2_driver);
unregister_1:
platform_driver_unregister(&bcm2835_alsa1_driver);
unregister_0:
platform_driver_unregister(&bcm2835_alsa0_driver);
out:
return err;
}
static void __devexit bcm2835_alsa_device_exit(void)
{
platform_driver_unregister(&bcm2835_alsa0_driver);
platform_driver_unregister(&bcm2835_alsa1_driver);
platform_driver_unregister(&bcm2835_alsa2_driver);
platform_driver_unregister(&bcm2835_alsa3_driver);
platform_driver_unregister(&bcm2835_alsa4_driver);
platform_driver_unregister(&bcm2835_alsa5_driver);
platform_driver_unregister(&bcm2835_alsa6_driver);
platform_driver_unregister(&bcm2835_alsa7_driver);
}
late_initcall(bcm2835_alsa_device_init);
module_exit(bcm2835_alsa_device_exit);
MODULE_AUTHOR("Dom Cobley");
MODULE_DESCRIPTION("Alsa driver for BCM2835 chip");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bcm2835_alsa");
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