354 lines
8.6 KiB
C
354 lines
8.6 KiB
C
/*
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* HWDEP Interface for HD-audio codec
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*
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* Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
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*
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* This driver is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This driver is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/compat.h>
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#include <linux/mutex.h>
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#include <linux/ctype.h>
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#include <sound/core.h>
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#include "hda_codec.h"
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#include "hda_local.h"
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#include <sound/hda_hwdep.h>
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#include <sound/minors.h>
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/*
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* write/read an out-of-bound verb
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*/
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static int verb_write_ioctl(struct hda_codec *codec,
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struct hda_verb_ioctl __user *arg)
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{
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u32 verb, res;
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if (get_user(verb, &arg->verb))
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return -EFAULT;
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res = snd_hda_codec_read(codec, verb >> 24, 0,
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(verb >> 8) & 0xffff, verb & 0xff);
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if (put_user(res, &arg->res))
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return -EFAULT;
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return 0;
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}
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static int get_wcap_ioctl(struct hda_codec *codec,
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struct hda_verb_ioctl __user *arg)
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{
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u32 verb, res;
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if (get_user(verb, &arg->verb))
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return -EFAULT;
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res = get_wcaps(codec, verb >> 24);
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if (put_user(res, &arg->res))
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return -EFAULT;
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return 0;
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}
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/*
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*/
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static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct hda_codec *codec = hw->private_data;
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void __user *argp = (void __user *)arg;
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switch (cmd) {
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case HDA_IOCTL_PVERSION:
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return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
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case HDA_IOCTL_VERB_WRITE:
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return verb_write_ioctl(codec, argp);
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case HDA_IOCTL_GET_WCAP:
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return get_wcap_ioctl(codec, argp);
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}
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return -ENOIOCTLCMD;
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}
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#ifdef CONFIG_COMPAT
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static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
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}
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#endif
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static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
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{
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#ifndef CONFIG_SND_DEBUG_VERBOSE
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if (!capable(CAP_SYS_RAWIO))
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return -EACCES;
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#endif
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return 0;
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}
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static void clear_hwdep_elements(struct hda_codec *codec)
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{
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char **head;
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int i;
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/* clear init verbs */
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snd_array_free(&codec->init_verbs);
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/* clear hints */
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head = codec->hints.list;
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for (i = 0; i < codec->hints.used; i++, head++)
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kfree(*head);
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snd_array_free(&codec->hints);
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}
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static void hwdep_free(struct snd_hwdep *hwdep)
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{
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clear_hwdep_elements(hwdep->private_data);
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}
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int __devinit snd_hda_create_hwdep(struct hda_codec *codec)
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{
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char hwname[16];
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struct snd_hwdep *hwdep;
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int err;
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sprintf(hwname, "HDA Codec %d", codec->addr);
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err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep);
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if (err < 0)
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return err;
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codec->hwdep = hwdep;
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sprintf(hwdep->name, "HDA Codec %d", codec->addr);
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hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
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hwdep->private_data = codec;
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hwdep->private_free = hwdep_free;
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hwdep->exclusive = 1;
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hwdep->ops.open = hda_hwdep_open;
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hwdep->ops.ioctl = hda_hwdep_ioctl;
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#ifdef CONFIG_COMPAT
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hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
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#endif
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snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
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snd_array_init(&codec->hints, sizeof(char *), 32);
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return 0;
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}
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#ifdef CONFIG_SND_HDA_RECONFIG
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/*
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* sysfs interface
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*/
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static int clear_codec(struct hda_codec *codec)
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{
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snd_hda_codec_reset(codec);
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clear_hwdep_elements(codec);
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return 0;
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}
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static int reconfig_codec(struct hda_codec *codec)
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{
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int err;
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snd_printk(KERN_INFO "hda-codec: reconfiguring\n");
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snd_hda_codec_reset(codec);
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err = snd_hda_codec_configure(codec);
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if (err < 0)
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return err;
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/* rebuild PCMs */
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err = snd_hda_codec_build_pcms(codec);
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if (err < 0)
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return err;
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/* rebuild mixers */
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err = snd_hda_codec_build_controls(codec);
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if (err < 0)
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return err;
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return 0;
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}
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/*
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* allocate a string at most len chars, and remove the trailing EOL
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*/
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static char *kstrndup_noeol(const char *src, size_t len)
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{
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char *s = kstrndup(src, len, GFP_KERNEL);
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char *p;
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if (!s)
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return NULL;
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p = strchr(s, '\n');
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if (p)
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*p = 0;
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return s;
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}
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#define CODEC_INFO_SHOW(type) \
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static ssize_t type##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
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struct hda_codec *codec = hwdep->private_data; \
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return sprintf(buf, "0x%x\n", codec->type); \
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}
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#define CODEC_INFO_STR_SHOW(type) \
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static ssize_t type##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
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struct hda_codec *codec = hwdep->private_data; \
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return sprintf(buf, "%s\n", \
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codec->type ? codec->type : ""); \
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}
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CODEC_INFO_SHOW(vendor_id);
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CODEC_INFO_SHOW(subsystem_id);
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CODEC_INFO_SHOW(revision_id);
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CODEC_INFO_SHOW(afg);
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CODEC_INFO_SHOW(mfg);
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CODEC_INFO_STR_SHOW(name);
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CODEC_INFO_STR_SHOW(modelname);
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#define CODEC_INFO_STORE(type) \
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static ssize_t type##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
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struct hda_codec *codec = hwdep->private_data; \
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char *after; \
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codec->type = simple_strtoul(buf, &after, 0); \
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return count; \
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}
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#define CODEC_INFO_STR_STORE(type) \
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static ssize_t type##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
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struct hda_codec *codec = hwdep->private_data; \
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char *s = kstrndup_noeol(buf, 64); \
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if (!s) \
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return -ENOMEM; \
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kfree(codec->type); \
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codec->type = s; \
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return count; \
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}
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CODEC_INFO_STORE(vendor_id);
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CODEC_INFO_STORE(subsystem_id);
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CODEC_INFO_STORE(revision_id);
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CODEC_INFO_STR_STORE(name);
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CODEC_INFO_STR_STORE(modelname);
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#define CODEC_ACTION_STORE(type) \
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static ssize_t type##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
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struct hda_codec *codec = hwdep->private_data; \
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int err = 0; \
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if (*buf) \
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err = type##_codec(codec); \
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return err < 0 ? err : count; \
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}
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CODEC_ACTION_STORE(reconfig);
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CODEC_ACTION_STORE(clear);
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static ssize_t init_verbs_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct snd_hwdep *hwdep = dev_get_drvdata(dev);
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struct hda_codec *codec = hwdep->private_data;
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char *p;
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struct hda_verb verb, *v;
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verb.nid = simple_strtoul(buf, &p, 0);
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verb.verb = simple_strtoul(p, &p, 0);
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verb.param = simple_strtoul(p, &p, 0);
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if (!verb.nid || !verb.verb || !verb.param)
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return -EINVAL;
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v = snd_array_new(&codec->init_verbs);
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if (!v)
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return -ENOMEM;
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*v = verb;
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return count;
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}
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static ssize_t hints_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct snd_hwdep *hwdep = dev_get_drvdata(dev);
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struct hda_codec *codec = hwdep->private_data;
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char *p;
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char **hint;
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if (!*buf || isspace(*buf) || *buf == '#' || *buf == '\n')
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return count;
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p = kstrndup_noeol(buf, 1024);
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if (!p)
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return -ENOMEM;
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hint = snd_array_new(&codec->hints);
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if (!hint) {
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kfree(p);
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return -ENOMEM;
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}
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*hint = p;
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return count;
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}
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#define CODEC_ATTR_RW(type) \
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__ATTR(type, 0644, type##_show, type##_store)
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#define CODEC_ATTR_RO(type) \
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__ATTR_RO(type)
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#define CODEC_ATTR_WO(type) \
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__ATTR(type, 0200, NULL, type##_store)
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static struct device_attribute codec_attrs[] = {
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CODEC_ATTR_RW(vendor_id),
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CODEC_ATTR_RW(subsystem_id),
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CODEC_ATTR_RW(revision_id),
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CODEC_ATTR_RO(afg),
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CODEC_ATTR_RO(mfg),
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CODEC_ATTR_RW(name),
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CODEC_ATTR_RW(modelname),
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CODEC_ATTR_WO(init_verbs),
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CODEC_ATTR_WO(hints),
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CODEC_ATTR_WO(reconfig),
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CODEC_ATTR_WO(clear),
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};
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/*
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* create sysfs files on hwdep directory
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*/
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int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
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{
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struct snd_hwdep *hwdep = codec->hwdep;
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int i;
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for (i = 0; i < ARRAY_SIZE(codec_attrs); i++)
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snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
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hwdep->device, &codec_attrs[i]);
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return 0;
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}
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#endif /* CONFIG_SND_HDA_RECONFIG */
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