Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / pci / hda / hda_hwdep.c

diff --git a/kernel/sound/pci/hda/hda_hwdep.c b/kernel/sound/pci/hda/hda_hwdep.c
new file mode 100644 (file)
index 0000000..57df06e
--- /dev/null
+++ b/kernel/sound/pci/hda/hda_hwdep.c
@@ -0,0 +1,124 @@
+/*
+ * HWDEP Interface for HD-audio codec
+ *
+ * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
+ *
+ *  This driver 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.
+ *
+ *  This driver is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/compat.h>
+#include <sound/core.h>
+#include "hda_codec.h"
+#include "hda_local.h"
+#include <sound/hda_hwdep.h>
+#include <sound/minors.h>
+
+/*
+ * write/read an out-of-bound verb
+ */
+static int verb_write_ioctl(struct hda_codec *codec,
+                           struct hda_verb_ioctl __user *arg)
+{
+       u32 verb, res;
+
+       if (get_user(verb, &arg->verb))
+               return -EFAULT;
+       res = snd_hda_codec_read(codec, verb >> 24, 0,
+                                (verb >> 8) & 0xffff, verb & 0xff);
+       if (put_user(res, &arg->res))
+               return -EFAULT;
+       return 0;
+}
+
+static int get_wcap_ioctl(struct hda_codec *codec,
+                         struct hda_verb_ioctl __user *arg)
+{
+       u32 verb, res;
+       
+       if (get_user(verb, &arg->verb))
+               return -EFAULT;
+       res = get_wcaps(codec, verb >> 24);
+       if (put_user(res, &arg->res))
+               return -EFAULT;
+       return 0;
+}
+
+
+/*
+ */
+static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
+                          unsigned int cmd, unsigned long arg)
+{
+       struct hda_codec *codec = hw->private_data;
+       void __user *argp = (void __user *)arg;
+
+       switch (cmd) {
+       case HDA_IOCTL_PVERSION:
+               return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
+       case HDA_IOCTL_VERB_WRITE:
+               return verb_write_ioctl(codec, argp);
+       case HDA_IOCTL_GET_WCAP:
+               return get_wcap_ioctl(codec, argp);
+       }
+       return -ENOIOCTLCMD;
+}
+
+#ifdef CONFIG_COMPAT
+static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
+                                 unsigned int cmd, unsigned long arg)
+{
+       return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
+{
+#ifndef CONFIG_SND_DEBUG_VERBOSE
+       if (!capable(CAP_SYS_RAWIO))
+               return -EACCES;
+#endif
+       return 0;
+}
+
+int snd_hda_create_hwdep(struct hda_codec *codec)
+{
+       char hwname[16];
+       struct snd_hwdep *hwdep;
+       int err;
+
+       sprintf(hwname, "HDA Codec %d", codec->addr);
+       err = snd_hwdep_new(codec->card, hwname, codec->addr, &hwdep);
+       if (err < 0)
+               return err;
+       codec->hwdep = hwdep;
+       sprintf(hwdep->name, "HDA Codec %d", codec->addr);
+       hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
+       hwdep->private_data = codec;
+       hwdep->exclusive = 1;
+
+       hwdep->ops.open = hda_hwdep_open;
+       hwdep->ops.ioctl = hda_hwdep_ioctl;
+#ifdef CONFIG_COMPAT
+       hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
+#endif
+
+       /* for sysfs */
+       hwdep->dev.groups = snd_hda_dev_attr_groups;
+       dev_set_drvdata(&hwdep->dev, codec);
+
+       return 0;
+}