/sound/pci/hda/hda_hwdep.c
C | 555 lines | 453 code | 58 blank | 44 comment | 53 complexity | 63466a909b15fb04b49b0398200930f5 MD5 | raw file
- /*
- * 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/pci.h>
- #include <linux/compat.h>
- #include <linux/mutex.h>
- #include <linux/ctype.h>
- #include <sound/core.h>
- #include "hda_codec.h"
- #include "hda_local.h"
- #include <sound/hda_hwdep.h>
- #include <sound/minors.h>
- /* hint string pair */
- struct hda_hint {
- const char *key;
- const char *val; /* contained in the same alloc as key */
- };
- /*
- * 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;
- }
- static void clear_hwdep_elements(struct hda_codec *codec)
- {
- int i;
- /* clear init verbs */
- snd_array_free(&codec->init_verbs);
- /* clear hints */
- for (i = 0; i < codec->hints.used; i++) {
- struct hda_hint *hint = snd_array_elem(&codec->hints, i);
- kfree(hint->key); /* we don't need to free hint->val */
- }
- snd_array_free(&codec->hints);
- snd_array_free(&codec->user_pins);
- }
- static void hwdep_free(struct snd_hwdep *hwdep)
- {
- clear_hwdep_elements(hwdep->private_data);
- }
- 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->private_free = hwdep_free;
- 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
- snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
- snd_array_init(&codec->hints, sizeof(struct hda_hint), 32);
- snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16);
- return 0;
- }
- #ifdef CONFIG_SND_HDA_RECONFIG
- /*
- * sysfs interface
- */
- static int clear_codec(struct hda_codec *codec)
- {
- int err;
- err = snd_hda_codec_reset(codec);
- if (err < 0) {
- snd_printk(KERN_ERR "The codec is being used, can't free.\n");
- return err;
- }
- clear_hwdep_elements(codec);
- return 0;
- }
- static int reconfig_codec(struct hda_codec *codec)
- {
- int err;
- snd_hda_power_up(codec);
- snd_printk(KERN_INFO "hda-codec: reconfiguring\n");
- err = snd_hda_codec_reset(codec);
- if (err < 0) {
- snd_printk(KERN_ERR
- "The codec is being used, can't reconfigure.\n");
- goto error;
- }
- err = snd_hda_codec_configure(codec);
- if (err < 0)
- goto error;
- /* rebuild PCMs */
- err = snd_hda_codec_build_pcms(codec);
- if (err < 0)
- goto error;
- /* rebuild mixers */
- err = snd_hda_codec_build_controls(codec);
- if (err < 0)
- goto error;
- err = snd_card_register(codec->bus->card);
- error:
- snd_hda_power_down(codec);
- return err;
- }
- /*
- * 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(vendor_name);
- CODEC_INFO_STR_SHOW(chip_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(vendor_name);
- CODEC_INFO_STR_STORE(chip_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);
- static ssize_t init_verbs_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;
- int i, len = 0;
- for (i = 0; i < codec->init_verbs.used; i++) {
- struct hda_verb *v = snd_array_elem(&codec->init_verbs, i);
- len += snprintf(buf + len, PAGE_SIZE - len,
- "0x%02x 0x%03x 0x%04x\n",
- v->nid, v->verb, v->param);
- }
- return len;
- }
- static ssize_t init_verbs_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;
- struct hda_verb *v;
- int nid, verb, param;
- if (sscanf(buf, "%i %i %i", &nid, &verb, ¶m) != 3)
- return -EINVAL;
- if (!nid || !verb)
- return -EINVAL;
- v = snd_array_new(&codec->init_verbs);
- if (!v)
- return -ENOMEM;
- v->nid = nid;
- v->verb = verb;
- v->param = param;
- return count;
- }
- static ssize_t hints_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;
- int i, len = 0;
- for (i = 0; i < codec->hints.used; i++) {
- struct hda_hint *hint = snd_array_elem(&codec->hints, i);
- len += snprintf(buf + len, PAGE_SIZE - len,
- "%s = %s\n", hint->key, hint->val);
- }
- return len;
- }
- static struct hda_hint *get_hint(struct hda_codec *codec, const char *key)
- {
- int i;
- for (i = 0; i < codec->hints.used; i++) {
- struct hda_hint *hint = snd_array_elem(&codec->hints, i);
- if (!strcmp(hint->key, key))
- return hint;
- }
- return NULL;
- }
- static void remove_trail_spaces(char *str)
- {
- char *p;
- if (!*str)
- return;
- p = str + strlen(str) - 1;
- for (; isspace(*p); p--) {
- *p = 0;
- if (p == str)
- return;
- }
- }
- #define MAX_HINTS 1024
- static ssize_t hints_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 *key, *val;
- struct hda_hint *hint;
- while (isspace(*buf))
- buf++;
- if (!*buf || *buf == '#' || *buf == '\n')
- return count;
- if (*buf == '=')
- return -EINVAL;
- key = kstrndup_noeol(buf, 1024);
- if (!key)
- return -ENOMEM;
- /* extract key and val */
- val = strchr(key, '=');
- if (!val) {
- kfree(key);
- return -EINVAL;
- }
- *val++ = 0;
- while (isspace(*val))
- val++;
- remove_trail_spaces(key);
- remove_trail_spaces(val);
- hint = get_hint(codec, key);
- if (hint) {
- /* replace */
- kfree(hint->key);
- hint->key = key;
- hint->val = val;
- return count;
- }
- /* allocate a new hint entry */
- if (codec->hints.used >= MAX_HINTS)
- hint = NULL;
- else
- hint = snd_array_new(&codec->hints);
- if (!hint) {
- kfree(key);
- return -ENOMEM;
- }
- hint->key = key;
- hint->val = val;
- return count;
- }
- static ssize_t pin_configs_show(struct hda_codec *codec,
- struct snd_array *list,
- char *buf)
- {
- int i, len = 0;
- for (i = 0; i < list->used; i++) {
- struct hda_pincfg *pin = snd_array_elem(list, i);
- len += sprintf(buf + len, "0x%02x 0x%08x\n",
- pin->nid, pin->cfg);
- }
- return len;
- }
- static ssize_t init_pin_configs_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 pin_configs_show(codec, &codec->init_pins, buf);
- }
- static ssize_t user_pin_configs_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 pin_configs_show(codec, &codec->user_pins, buf);
- }
- static ssize_t driver_pin_configs_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 pin_configs_show(codec, &codec->driver_pins, buf);
- }
- #define MAX_PIN_CONFIGS 32
- static ssize_t user_pin_configs_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 nid, cfg;
- int err;
- if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
- return -EINVAL;
- if (!nid)
- return -EINVAL;
- err = snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
- if (err < 0)
- return err;
- return count;
- }
- #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(vendor_name),
- CODEC_ATTR_RW(chip_name),
- CODEC_ATTR_RW(modelname),
- CODEC_ATTR_RW(init_verbs),
- CODEC_ATTR_RW(hints),
- CODEC_ATTR_RO(init_pin_configs),
- CODEC_ATTR_RW(user_pin_configs),
- CODEC_ATTR_RO(driver_pin_configs),
- 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;
- }
- /*
- * Look for hint string
- */
- const char *snd_hda_get_hint(struct hda_codec *codec, const char *key)
- {
- struct hda_hint *hint = get_hint(codec, key);
- return hint ? hint->val : NULL;
- }
- EXPORT_SYMBOL_HDA(snd_hda_get_hint);
- int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key)
- {
- const char *p = snd_hda_get_hint(codec, key);
- if (!p || !*p)
- return -ENOENT;
- switch (toupper(*p)) {
- case 'T': /* true */
- case 'Y': /* yes */
- case '1':
- return 1;
- }
- return 0;
- }
- EXPORT_SYMBOL_HDA(snd_hda_get_bool_hint);
- #endif /* CONFIG_SND_HDA_RECONFIG */