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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/pci/hda/hda_hwdep.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/pci/hda/hda_hwdep.c')
-rw-r--r--sound/pci/hda/hda_hwdep.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
new file mode 100644
index 0000000000..727f39aced
--- /dev/null
+++ b/sound/pci/hda/hda_hwdep.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * HWDEP Interface for HD-audio codec
+ *
+ * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/compat.h>
+#include <linux/nospec.h>
+#include <sound/core.h>
+#include <sound/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;
+ /* open-code get_wcaps(verb>>24) with nospec */
+ verb >>= 24;
+ if (verb < codec->core.start_nid ||
+ verb >= codec->core.start_nid + codec->core.num_nodes) {
+ res = 0;
+ } else {
+ verb -= codec->core.start_nid;
+ verb = array_index_nospec(verb, codec->core.num_nodes);
+ res = codec->wcaps[verb];
+ }
+ 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;
+}