}
return 0;
}
+
+static struct snd_kcontrol_new snd_bcm2835_headphones_ctl[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Headphone Playback Volume",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+ .private_value = PCM_PLAYBACK_VOLUME,
+ .info = snd_bcm2835_ctl_info,
+ .get = snd_bcm2835_ctl_get,
+ .put = snd_bcm2835_ctl_put,
+ .count = 1,
+ .tlv = {.p = snd_bcm2835_db_scale}
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Headphone Playback Switch",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = PCM_PLAYBACK_MUTE,
+ .info = snd_bcm2835_ctl_info,
+ .get = snd_bcm2835_ctl_get,
+ .put = snd_bcm2835_ctl_put,
+ .count = 1,
+ }
+};
+
+int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip)
+{
+ int err;
+ unsigned int idx;
+
+ strcpy(chip->card->mixername, "Broadcom Mixer");
+ for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_headphones_ctl); idx++) {
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&snd_bcm2835_headphones_ctl[idx],
+ chip));
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+static struct snd_kcontrol_new snd_bcm2835_hdmi[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Playback Volume",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+ .private_value = PCM_PLAYBACK_VOLUME,
+ .info = snd_bcm2835_ctl_info,
+ .get = snd_bcm2835_ctl_get,
+ .put = snd_bcm2835_ctl_put,
+ .count = 1,
+ .tlv = {.p = snd_bcm2835_db_scale}
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Playback Switch",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = PCM_PLAYBACK_MUTE,
+ .info = snd_bcm2835_ctl_info,
+ .get = snd_bcm2835_ctl_get,
+ .put = snd_bcm2835_ctl_put,
+ .count = 1,
+ }
+};
+
+int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip)
+{
+ int err;
+ unsigned int idx;
+
+ strcpy(chip->card->mixername, "Broadcom Mixer");
+ for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_hdmi); idx++) {
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&snd_bcm2835_hdmi[idx], chip));
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
#include "bcm2835.h"
-/* 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 bool enable_hdmi;
+static bool enable_headphones;
+static bool enable_compat_alsa = true;
+
+module_param(enable_hdmi, bool, 0444);
+MODULE_PARM_DESC(enable_hdmi, "Enables HDMI virtual audio device");
+module_param(enable_headphones, bool, 0444);
+MODULE_PARM_DESC(enable_headphones, "Enables Headphones virtual audio device");
+module_param(enable_compat_alsa, bool, 0444);
+MODULE_PARM_DESC(enable_compat_alsa,
+ "Enables ALSA compatibility virtual audio device");
+
+static void snd_devm_unregister_child(struct device *dev, void *res)
+{
+ struct device *childdev = *(struct device **)res;
+
+ device_unregister(childdev);
+}
+
+static int snd_devm_add_child(struct device *dev, struct device *child)
+{
+ struct device **dr;
+ int ret;
+
+ dr = devres_alloc(snd_devm_unregister_child, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ ret = device_add(child);
+ if (ret) {
+ devres_free(dr);
+ return ret;
+ }
+
+ *dr = child;
+ devres_add(dev, dr);
+
+ return 0;
+}
+
+static struct device *
+snd_create_device(struct device *parent,
+ struct device_driver *driver,
+ const char *name)
+{
+ struct device *device;
+ int ret;
-static struct snd_card *g_card;
-static struct bcm2835_chip *g_chip;
+ device = devm_kzalloc(parent, sizeof(*device), GFP_KERNEL);
+ if (!device)
+ return ERR_PTR(-ENOMEM);
+
+ device_initialize(device);
+ device->parent = parent;
+ device->driver = driver;
+
+ dev_set_name(device, "%s", name);
+
+ ret = snd_devm_add_child(parent, device);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return device;
+}
static int snd_bcm2835_free(struct bcm2835_chip *chip)
{
* (see "Management of Cards and Components")
*/
static int snd_bcm2835_create(struct snd_card *card,
- struct platform_device *pdev,
struct bcm2835_chip **rchip)
{
struct bcm2835_chip *chip;
chip->card = card;
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
- if (err < 0) {
+ if (err) {
snd_bcm2835_free(chip);
return err;
}
return 0;
}
-static int snd_bcm2835_alsa_probe_dt(struct platform_device *pdev)
+static void snd_devm_card_free(struct device *dev, void *res)
{
- struct device *dev = &pdev->dev;
- struct bcm2835_chip *chip;
+ struct snd_card *snd_card = *(struct snd_card **)res;
+
+ snd_card_free(snd_card);
+}
+
+static struct snd_card *snd_devm_card_new(struct device *dev)
+{
+ struct snd_card **dr;
struct snd_card *card;
- u32 numchans;
- int err, i;
+ int ret;
- err = of_property_read_u32(dev->of_node, "brcm,pwm-channels",
- &numchans);
- if (err) {
- dev_err(dev, "Failed to get DT property 'brcm,pwm-channels'");
- return err;
- }
+ dr = devres_alloc(snd_devm_card_free, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return ERR_PTR(-ENOMEM);
- if (numchans == 0 || numchans > MAX_SUBSTREAMS) {
- numchans = MAX_SUBSTREAMS;
- dev_warn(dev, "Illegal 'brcm,pwm-channels' value, will use %u\n",
- numchans);
+ ret = snd_card_new(dev, -1, NULL, THIS_MODULE, 0, &card);
+ if (ret) {
+ devres_free(dr);
+ return ERR_PTR(ret);
}
- err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card);
- if (err) {
- dev_err(dev, "Failed to create soundcard structure\n");
+ *dr = card;
+ devres_add(dev, dr);
+
+ return card;
+}
+
+typedef int (*bcm2835_audio_newpcm_func)(struct bcm2835_chip *chip,
+ const char *name,
+ enum snd_bcm2835_route route,
+ u32 numchannels);
+
+typedef int (*bcm2835_audio_newctl_func)(struct bcm2835_chip *chip);
+
+struct bcm2835_audio_driver {
+ struct device_driver driver;
+ const char *shortname;
+ const char *longname;
+ int minchannels;
+ bcm2835_audio_newpcm_func newpcm;
+ bcm2835_audio_newctl_func newctl;
+ enum snd_bcm2835_route route;
+};
+
+static int bcm2835_audio_alsa_newpcm(struct bcm2835_chip *chip,
+ const char *name,
+ enum snd_bcm2835_route route,
+ u32 numchannels)
+{
+ int err;
+
+ err = snd_bcm2835_new_pcm(chip, numchannels - 1);
+ if (err)
return err;
- }
- snd_card_set_dev(card, dev);
- strcpy(card->driver, "bcm2835");
- strcpy(card->shortname, "bcm2835 ALSA");
- sprintf(card->longname, "%s", card->shortname);
+ err = snd_bcm2835_new_spdif_pcm(chip);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static struct bcm2835_audio_driver bcm2835_audio_alsa = {
+ .driver = {
+ .name = "bcm2835_alsa",
+ .owner = THIS_MODULE,
+ },
+ .shortname = "bcm2835 ALSA",
+ .longname = "bcm2835 ALSA",
+ .minchannels = 2,
+ .newpcm = bcm2835_audio_alsa_newpcm,
+ .newctl = snd_bcm2835_new_ctl,
+};
+
+static struct bcm2835_audio_driver bcm2835_audio_hdmi = {
+ .driver = {
+ .name = "bcm2835_hdmi",
+ .owner = THIS_MODULE,
+ },
+ .shortname = "bcm2835 HDMI",
+ .longname = "bcm2835 HDMI",
+ .minchannels = 1,
+ .newpcm = snd_bcm2835_new_simple_pcm,
+ .newctl = snd_bcm2835_new_hdmi_ctl,
+ .route = AUDIO_DEST_HDMI
+};
+
+static struct bcm2835_audio_driver bcm2835_audio_headphones = {
+ .driver = {
+ .name = "bcm2835_headphones",
+ .owner = THIS_MODULE,
+ },
+ .shortname = "bcm2835 Headphones",
+ .longname = "bcm2835 Headphones",
+ .minchannels = 1,
+ .newpcm = snd_bcm2835_new_simple_pcm,
+ .newctl = snd_bcm2835_new_headphones_ctl,
+ .route = AUDIO_DEST_HEADPHONES
+};
+
+struct bcm2835_audio_drivers {
+ struct bcm2835_audio_driver *audio_driver;
+ const bool *is_enabled;
+};
+
+static struct bcm2835_audio_drivers children_devices[] = {
+ {
+ .audio_driver = &bcm2835_audio_alsa,
+ .is_enabled = &enable_compat_alsa,
+ },
+ {
+ .audio_driver = &bcm2835_audio_hdmi,
+ .is_enabled = &enable_hdmi,
+ },
+ {
+ .audio_driver = &bcm2835_audio_headphones,
+ .is_enabled = &enable_headphones,
+ },
+};
- err = snd_bcm2835_create(card, pdev, &chip);
- if (err < 0) {
- dev_err(dev, "Failed to create bcm2835 chip\n");
- goto err_free;
+static int snd_add_child_device(struct device *device,
+ struct bcm2835_audio_driver *audio_driver,
+ u32 numchans)
+{
+ struct snd_card *card;
+ struct device *child;
+ struct bcm2835_chip *chip;
+ int err, i;
+
+ child = snd_create_device(device, &audio_driver->driver,
+ audio_driver->driver.name);
+ if (IS_ERR(child)) {
+ dev_err(device,
+ "Unable to create child device %p, error %ld",
+ audio_driver->driver.name,
+ PTR_ERR(child));
+ return PTR_ERR(child);
}
- err = snd_bcm2835_new_pcm(chip);
- if (err < 0) {
- dev_err(dev, "Failed to create new bcm2835 pcm device\n");
- goto err_free;
+ card = snd_devm_card_new(child);
+ if (IS_ERR(card)) {
+ dev_err(child, "Failed to create card");
+ return PTR_ERR(card);
}
- err = snd_bcm2835_new_spdif_pcm(chip);
- if (err < 0) {
- dev_err(dev, "Failed to create new bcm2835 spdif pcm device\n");
- goto err_free;
+ snd_card_set_dev(card, child);
+ strcpy(card->driver, audio_driver->driver.name);
+ strcpy(card->shortname, audio_driver->shortname);
+ strcpy(card->longname, audio_driver->longname);
+
+ err = snd_bcm2835_create(card, &chip);
+ if (err) {
+ dev_err(child, "Failed to create chip, error %d\n", err);
+ return err;
}
- err = snd_bcm2835_new_ctl(chip);
- if (err < 0) {
- dev_err(dev, "Failed to create new bcm2835 ctl\n");
- goto err_free;
+ chip->dev = child;
+
+ err = audio_driver->newpcm(chip, audio_driver->shortname,
+ audio_driver->route,
+ numchans);
+ if (err) {
+ dev_err(child, "Failed to create pcm, error %d\n", err);
+ return err;
}
- for (i = 0; i < numchans; i++) {
- chip->avail_substreams |= (1 << i);
- chip->pdev[i] = pdev;
+ err = audio_driver->newctl(chip);
+ if (err) {
+ dev_err(child, "Failed to create controls, error %d\n", err);
+ return err;
}
+ for (i = 0; i < numchans; i++)
+ chip->avail_substreams |= (1 << i);
+
err = snd_card_register(card);
if (err) {
- dev_err(dev, "Failed to register bcm2835 ALSA card\n");
- goto err_free;
+ dev_err(child, "Failed to register card, error %d\n", err);
+ return err;
}
- g_card = card;
- g_chip = chip;
- platform_set_drvdata(pdev, card);
- audio_info("bcm2835 ALSA card created with %u channels\n", numchans);
+ dev_set_drvdata(child, card);
+ dev_info(child, "card created with %d channels\n", numchans);
return 0;
+}
+
+static int snd_add_child_devices(struct device *device, u32 numchans)
+{
+ int i;
+ int count_devices = 0;
+ int minchannels = 0;
+ int extrachannels = 0;
+ int extrachannels_per_driver = 0;
+ int extrachannels_remainder = 0;
+
+ for (i = 0; i < ARRAY_SIZE(children_devices); i++)
+ if (*children_devices[i].is_enabled)
+ count_devices++;
+
+ if (!count_devices)
+ return 0;
+
+ for (i = 0; i < ARRAY_SIZE(children_devices); i++)
+ if (*children_devices[i].is_enabled)
+ minchannels +=
+ children_devices[i].audio_driver->minchannels;
+
+ if (minchannels < numchans) {
+ extrachannels = numchans - minchannels;
+ extrachannels_per_driver = extrachannels / count_devices;
+ extrachannels_remainder = extrachannels % count_devices;
+ }
-err_free:
- snd_card_free(card);
-
- return err;
-}
-
-static int snd_bcm2835_alsa_remove(struct platform_device *pdev)
-{
- int 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 = (int)(long)drv_data;
- if (g_card) {
- BUG_ON(!g_chip);
- /* We pass chip device numbers in audio ipc devices
- * other than the one we registered our card with
- */
- idx = (int)(long)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);
+ dev_dbg(device, "minchannels %d\n", minchannels);
+ dev_dbg(device, "extrachannels %d\n", extrachannels);
+ dev_dbg(device, "extrachannels_per_driver %d\n",
+ extrachannels_per_driver);
+ dev_dbg(device, "extrachannels_remainder %d\n",
+ extrachannels_remainder);
+
+ for (i = 0; i < ARRAY_SIZE(children_devices); i++) {
+ int err;
+ int numchannels_this_device;
+ struct bcm2835_audio_driver *audio_driver;
+
+ if (!*children_devices[i].is_enabled)
+ continue;
+
+ audio_driver = children_devices[i].audio_driver;
+
+ if (audio_driver->minchannels > numchans) {
+ dev_err(device,
+ "Out of channels, needed %d but only %d left\n",
+ audio_driver->minchannels,
+ numchans);
+ continue;
}
+
+ numchannels_this_device =
+ audio_driver->minchannels + extrachannels_per_driver +
+ extrachannels_remainder;
+ extrachannels_remainder = 0;
+
+ numchans -= numchannels_this_device;
+
+ err = snd_add_child_device(device, audio_driver,
+ numchannels_this_device);
+ if (err)
+ return err;
}
- platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static int snd_bcm2835_alsa_probe_dt(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ u32 numchans;
+ int err;
+
+ err = of_property_read_u32(dev->of_node, "brcm,pwm-channels",
+ &numchans);
+ if (err) {
+ dev_err(dev, "Failed to get DT property 'brcm,pwm-channels'");
+ return err;
+ }
+
+ if (numchans == 0 || numchans > MAX_SUBSTREAMS) {
+ numchans = MAX_SUBSTREAMS;
+ dev_warn(dev,
+ "Illegal 'brcm,pwm-channels' value, will use %u\n",
+ numchans);
+ }
+
+ err = snd_add_child_devices(dev, numchans);
+ if (err)
+ return err;
return 0;
}
static struct platform_driver bcm2835_alsa0_driver = {
.probe = snd_bcm2835_alsa_probe_dt,
- .remove = snd_bcm2835_alsa_remove,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
- .name = "bcm2835_AUD0",
+ .name = "bcm2835_audio",
.owner = THIS_MODULE,
.of_match_table = snd_bcm2835_of_match_table,
},
retval = platform_driver_register(&bcm2835_alsa0_driver);
if (retval)
- pr_err("Error registering bcm2835_alsa0_driver %d .\n", retval);
+ pr_err("Error registering bcm2835_audio driver %d .\n", retval);
return retval;
}
projects / linux.git / commitdiff