/* * HWDEP Interface for HD-audio codec * * Copyright (c) 2007 Takashi Iwai * * 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 #include #include #include #include #include #include "hda_codec.h" #include "hda_local.h" #include #include /* * 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 __devinit 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->bus->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 return 0; } /* * sysfs interface */ static int clear_codec(struct hda_codec *codec) { snd_hda_codec_reset(codec); return 0; } static int reconfig_codec(struct hda_codec *codec) { int err; snd_printk(KERN_INFO "hda-codec: reconfiguring\n"); snd_hda_codec_reset(codec); err = snd_hda_codec_configure(codec); if (err < 0) return err; /* rebuild PCMs */ err = snd_hda_build_pcms(codec->bus); if (err < 0) return err; /* rebuild mixers */ err = snd_hda_codec_build_controls(codec); if (err < 0) return err; return 0; } /* * allocate a string at most len chars, and remove the trailing EOL */ static char *kstrndup_noeol(const char *src, size_t len) { char *s = kstrndup(src, len, GFP_KERNEL); char *p; if (!s) return NULL; p = strchr(s, '\n'); if (p) *p = 0; return s; } #define CODEC_INFO_SHOW(type) \ static ssize_t type##_show(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ struct hda_codec *codec = hwdep->private_data; \ return sprintf(buf, "0x%x\n", codec->type); \ } #define CODEC_INFO_STR_SHOW(type) \ static ssize_t type##_show(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ struct hda_codec *codec = hwdep->private_data; \ return sprintf(buf, "%s\n", \ codec->type ? codec->type : ""); \ } CODEC_INFO_SHOW(vendor_id); CODEC_INFO_SHOW(subsystem_id); CODEC_INFO_SHOW(revision_id); CODEC_INFO_SHOW(afg); CODEC_INFO_SHOW(mfg); CODEC_INFO_STR_SHOW(name); CODEC_INFO_STR_SHOW(modelname); #define CODEC_INFO_STORE(type) \ static ssize_t type##_store(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t count) \ { \ struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ struct hda_codec *codec = hwdep->private_data; \ char *after; \ codec->type = simple_strtoul(buf, &after, 0); \ return count; \ } #define CODEC_INFO_STR_STORE(type) \ static ssize_t type##_store(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t count) \ { \ struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ struct hda_codec *codec = hwdep->private_data; \ char *s = kstrndup_noeol(buf, 64); \ if (!s) \ return -ENOMEM; \ kfree(codec->type); \ codec->type = s; \ return count; \ } CODEC_INFO_STORE(vendor_id); CODEC_INFO_STORE(subsystem_id); CODEC_INFO_STORE(revision_id); CODEC_INFO_STR_STORE(name); CODEC_INFO_STR_STORE(modelname); #define CODEC_ACTION_STORE(type) \ static ssize_t type##_store(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t count) \ { \ struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ struct hda_codec *codec = hwdep->private_data; \ int err = 0; \ if (*buf) \ err = type##_codec(codec); \ return err < 0 ? err : count; \ } CODEC_ACTION_STORE(reconfig); CODEC_ACTION_STORE(clear); #define CODEC_ATTR_RW(type) \ __ATTR(type, 0644, type##_show, type##_store) #define CODEC_ATTR_RO(type) \ __ATTR_RO(type) #define CODEC_ATTR_WO(type) \ __ATTR(type, 0200, NULL, type##_store) static struct device_attribute codec_attrs[] = { CODEC_ATTR_RW(vendor_id), CODEC_ATTR_RW(subsystem_id), CODEC_ATTR_RW(revision_id), CODEC_ATTR_RO(afg), CODEC_ATTR_RO(mfg), CODEC_ATTR_RW(name), CODEC_ATTR_RW(modelname), CODEC_ATTR_WO(reconfig), CODEC_ATTR_WO(clear), }; /* * create sysfs files on hwdep directory */ int snd_hda_hwdep_add_sysfs(struct hda_codec *codec) { struct snd_hwdep *hwdep = codec->hwdep; int i; for (i = 0; i < ARRAY_SIZE(codec_attrs); i++) snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device, &codec_attrs[i]); return 0; }