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-rw-r--r--include/sound/ac97_codec.h6
-rw-r--r--sound/pci/Kconfig10
-rw-r--r--sound/pci/ac97/Makefile2
-rw-r--r--sound/pci/ac97/ac97_bus.c79
-rw-r--r--sound/pci/ac97/ac97_codec.c35
5 files changed, 129 insertions, 3 deletions
diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index cbe72e06c46..2857cf0472d 100644
--- a/include/sound/ac97_codec.h
+++ b/include/sound/ac97_codec.h
@@ -26,6 +26,7 @@
*/
#include <linux/bitops.h>
+#include <linux/device.h>
#include "pcm.h"
#include "control.h"
#include "info.h"
@@ -523,6 +524,7 @@ struct _snd_ac97 {
/* jack-sharing info */
unsigned char indep_surround;
unsigned char channel_mode;
+ struct device dev;
};
/* conditions */
@@ -602,4 +604,8 @@ struct ac97_enum {
unsigned short mask;
const char **texts;
};
+
+/* ad hoc AC97 device driver access */
+extern struct bus_type ac97_bus_type;
+
#endif /* __SOUND_AC97_CODEC_H */
diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index 26b42bb20a0..1e458919cce 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -1,11 +1,15 @@
# ALSA PCI drivers
-menu "PCI devices"
- depends on SND!=n && PCI
-
config SND_AC97_CODEC
tristate
select SND_PCM
+ select SND_AC97_BUS
+
+config SND_AC97_BUS
+ tristate
+
+menu "PCI devices"
+ depends on SND!=n && PCI
config SND_ALI5451
tristate "ALi M5451 PCI Audio Controller"
diff --git a/sound/pci/ac97/Makefile b/sound/pci/ac97/Makefile
index 3c3222122d8..77b3482cb13 100644
--- a/sound/pci/ac97/Makefile
+++ b/sound/pci/ac97/Makefile
@@ -10,9 +10,11 @@ snd-ac97-codec-objs += ac97_proc.o
endif
snd-ak4531-codec-objs := ak4531_codec.o
+snd-ac97-bus-objs := ac97_bus.o
# Toplevel Module Dependency
obj-$(CONFIG_SND_AC97_CODEC) += snd-ac97-codec.o
obj-$(CONFIG_SND_ENS1370) += snd-ak4531-codec.o
+obj-$(CONFIG_SND_AC97_BUS) += snd-ac97-bus.o
obj-m := $(sort $(obj-m))
diff --git a/sound/pci/ac97/ac97_bus.c b/sound/pci/ac97/ac97_bus.c
new file mode 100644
index 00000000000..227f8b9f67c
--- /dev/null
+++ b/sound/pci/ac97/ac97_bus.c
@@ -0,0 +1,79 @@
+/*
+ * Linux driver model AC97 bus interface
+ *
+ * Author: Nicolas Pitre
+ * Created: Jan 14, 2005
+ * Copyright: (C) MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/string.h>
+
+/*
+ * Codec families have names seperated by commas, so we search for an
+ * individual codec name within the family string.
+ */
+static int ac97_bus_match(struct device *dev, struct device_driver *drv)
+{
+ return (strstr(dev->bus_id, drv->name) != NULL);
+}
+
+static int ac97_bus_suspend(struct device *dev, pm_message_t state)
+{
+ int ret = 0;
+
+ if (dev->driver && dev->driver->suspend) {
+ ret = dev->driver->suspend(dev, state, SUSPEND_DISABLE);
+ if (ret == 0)
+ ret = dev->driver->suspend(dev, state, SUSPEND_SAVE_STATE);
+ if (ret == 0)
+ ret = dev->driver->suspend(dev, state, SUSPEND_POWER_DOWN);
+ }
+ return ret;
+}
+
+static int ac97_bus_resume(struct device *dev)
+{
+ int ret = 0;
+
+ if (dev->driver && dev->driver->resume) {
+ ret = dev->driver->resume(dev, RESUME_POWER_ON);
+ if (ret == 0)
+ ret = dev->driver->resume(dev, RESUME_RESTORE_STATE);
+ if (ret == 0)
+ ret = dev->driver->resume(dev, RESUME_ENABLE);
+ }
+ return ret;
+}
+
+struct bus_type ac97_bus_type = {
+ .name = "ac97",
+ .match = ac97_bus_match,
+ .suspend = ac97_bus_suspend,
+ .resume = ac97_bus_resume,
+};
+
+static int __init ac97_bus_init(void)
+{
+ return bus_register(&ac97_bus_type);
+}
+
+subsys_initcall(ac97_bus_init);
+
+static void __exit ac97_bus_exit(void)
+{
+ bus_unregister(&ac97_bus_type);
+}
+
+module_exit(ac97_bus_exit);
+
+EXPORT_SYMBOL(ac97_bus_type);
+
+MODULE_LICENSE("GPL");
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index cbf790270c3..33dba10f03e 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1813,6 +1813,39 @@ int snd_ac97_bus(snd_card_t *card, int num, ac97_bus_ops_t *ops,
return 0;
}
+/* stop no dev release warning */
+static void ac97_device_release(struct device * dev)
+{
+}
+
+/* register ac97 codec to bus */
+static int snd_ac97_dev_register(snd_device_t *device)
+{
+ ac97_t *ac97 = device->device_data;
+ int err;
+
+ ac97->dev.bus = &ac97_bus_type;
+ ac97->dev.parent = ac97->bus->card->dev;
+ ac97->dev.platform_data = ac97;
+ ac97->dev.release = ac97_device_release;
+ strncpy(ac97->dev.bus_id, snd_ac97_get_short_name(ac97), BUS_ID_SIZE);
+ if ((err = device_register(&ac97->dev)) < 0) {
+ snd_printk(KERN_ERR "Can't register ac97 bus\n");
+ ac97->dev.bus = NULL;
+ return err;
+ }
+ return 0;
+}
+
+/* unregister ac97 codec */
+static int snd_ac97_dev_unregister(snd_device_t *device)
+{
+ ac97_t *ac97 = device->device_data;
+ if (ac97->dev.bus)
+ device_unregister(&ac97->dev);
+ return snd_ac97_free(ac97);
+}
+
/* build_ops to do nothing */
static struct snd_ac97_build_ops null_build_ops;
@@ -1846,6 +1879,8 @@ int snd_ac97_mixer(ac97_bus_t *bus, ac97_template_t *template, ac97_t **rac97)
const ac97_codec_id_t *pid;
static snd_device_ops_t ops = {
.dev_free = snd_ac97_dev_free,
+ .dev_register = snd_ac97_dev_register,
+ .dev_unregister = snd_ac97_dev_unregister,
};
snd_assert(rac97 != NULL, return -EINVAL);