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path: root/sound/pci/hda/hda_hwdep.c
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Diffstat (limited to 'sound/pci/hda/hda_hwdep.c')
-rw-r--r--sound/pci/hda/hda_hwdep.c817
1 files changed, 817 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
new file mode 100644
index 00000000..6b2efb8c
--- /dev/null
+++ b/sound/pci/hda/hda_hwdep.c
@@ -0,0 +1,817 @@
+/*
+ * 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 <linux/string.h>
+#include <linux/firmware.h>
+#include <linux/export.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_POWER_SAVE
+static ssize_t power_on_acct_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;
+ snd_hda_update_power_acct(codec);
+ return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
+}
+
+static ssize_t power_off_acct_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;
+ snd_hda_update_power_acct(codec);
+ return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
+}
+
+static struct device_attribute power_attrs[] = {
+ __ATTR_RO(power_on_acct),
+ __ATTR_RO(power_off_acct),
+};
+
+int snd_hda_hwdep_add_power_sysfs(struct hda_codec *codec)
+{
+ struct snd_hwdep *hwdep = codec->hwdep;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(power_attrs); i++)
+ snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
+ hwdep->device, &power_attrs[i]);
+ return 0;
+}
+#endif /* CONFIG_SND_HDA_POWER_SAVE */
+
+#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; \
+ unsigned long val; \
+ int err = strict_strtoul(buf, 0, &val); \
+ if (err < 0) \
+ return err; \
+ codec->type = val; \
+ 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 int parse_init_verbs(struct hda_codec *codec, const char *buf)
+{
+ struct hda_verb *v;
+ int nid, verb, param;
+
+ if (sscanf(buf, "%i %i %i", &nid, &verb, &param) != 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 0;
+}
+
+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;
+ int err = parse_init_verbs(codec, buf);
+ if (err < 0)
+ return err;
+ 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 int parse_hints(struct hda_codec *codec, const char *buf)
+{
+ char *key, *val;
+ struct hda_hint *hint;
+
+ buf = skip_spaces(buf);
+ if (!*buf || *buf == '#' || *buf == '\n')
+ return 0;
+ 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;
+ val = skip_spaces(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 0;
+ }
+ /* 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 0;
+}
+
+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;
+ int err = parse_hints(codec, buf);
+ if (err < 0)
+ return err;
+ 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 int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
+{
+ int nid, cfg;
+
+ if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
+ return -EINVAL;
+ if (!nid)
+ return -EINVAL;
+ return snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
+}
+
+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 err = parse_user_pin_configs(codec, buf);
+ 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 */
+
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+
+/* parser mode */
+enum {
+ LINE_MODE_NONE,
+ LINE_MODE_CODEC,
+ LINE_MODE_MODEL,
+ LINE_MODE_PINCFG,
+ LINE_MODE_VERB,
+ LINE_MODE_HINT,
+ LINE_MODE_VENDOR_ID,
+ LINE_MODE_SUBSYSTEM_ID,
+ LINE_MODE_REVISION_ID,
+ LINE_MODE_CHIP_NAME,
+ NUM_LINE_MODES,
+};
+
+static inline int strmatch(const char *a, const char *b)
+{
+ return strnicmp(a, b, strlen(b)) == 0;
+}
+
+/* parse the contents after the line "[codec]"
+ * accept only the line with three numbers, and assign the current codec
+ */
+static void parse_codec_mode(char *buf, struct hda_bus *bus,
+ struct hda_codec **codecp)
+{
+ int vendorid, subid, caddr;
+ struct hda_codec *codec;
+
+ *codecp = NULL;
+ if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) {
+ list_for_each_entry(codec, &bus->codec_list, list) {
+ if ((vendorid <= 0 || codec->vendor_id == vendorid) &&
+ (subid <= 0 || codec->subsystem_id == subid) &&
+ codec->addr == caddr) {
+ *codecp = codec;
+ break;
+ }
+ }
+ }
+}
+
+/* parse the contents after the other command tags, [pincfg], [verb],
+ * [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model]
+ * just pass to the sysfs helper (only when any codec was specified)
+ */
+static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
+ struct hda_codec **codecp)
+{
+ parse_user_pin_configs(*codecp, buf);
+}
+
+static void parse_verb_mode(char *buf, struct hda_bus *bus,
+ struct hda_codec **codecp)
+{
+ parse_init_verbs(*codecp, buf);
+}
+
+static void parse_hint_mode(char *buf, struct hda_bus *bus,
+ struct hda_codec **codecp)
+{
+ parse_hints(*codecp, buf);
+}
+
+static void parse_model_mode(char *buf, struct hda_bus *bus,
+ struct hda_codec **codecp)
+{
+ kfree((*codecp)->modelname);
+ (*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
+}
+
+static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
+ struct hda_codec **codecp)
+{
+ kfree((*codecp)->chip_name);
+ (*codecp)->chip_name = kstrdup(buf, GFP_KERNEL);
+}
+
+#define DEFINE_PARSE_ID_MODE(name) \
+static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
+ struct hda_codec **codecp) \
+{ \
+ unsigned long val; \
+ if (!strict_strtoul(buf, 0, &val)) \
+ (*codecp)->name = val; \
+}
+
+DEFINE_PARSE_ID_MODE(vendor_id);
+DEFINE_PARSE_ID_MODE(subsystem_id);
+DEFINE_PARSE_ID_MODE(revision_id);
+
+
+struct hda_patch_item {
+ const char *tag;
+ void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
+ int need_codec;
+};
+
+static struct hda_patch_item patch_items[NUM_LINE_MODES] = {
+ [LINE_MODE_CODEC] = { "[codec]", parse_codec_mode, 0 },
+ [LINE_MODE_MODEL] = { "[model]", parse_model_mode, 1 },
+ [LINE_MODE_VERB] = { "[verb]", parse_verb_mode, 1 },
+ [LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode, 1 },
+ [LINE_MODE_HINT] = { "[hint]", parse_hint_mode, 1 },
+ [LINE_MODE_VENDOR_ID] = { "[vendor_id]", parse_vendor_id_mode, 1 },
+ [LINE_MODE_SUBSYSTEM_ID] = { "[subsystem_id]", parse_subsystem_id_mode, 1 },
+ [LINE_MODE_REVISION_ID] = { "[revision_id]", parse_revision_id_mode, 1 },
+ [LINE_MODE_CHIP_NAME] = { "[chip_name]", parse_chip_name_mode, 1 },
+};
+
+/* check the line starting with '[' -- change the parser mode accodingly */
+static int parse_line_mode(char *buf, struct hda_bus *bus)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(patch_items); i++) {
+ if (!patch_items[i].tag)
+ continue;
+ if (strmatch(buf, patch_items[i].tag))
+ return i;
+ }
+ return LINE_MODE_NONE;
+}
+
+/* copy one line from the buffer in fw, and update the fields in fw
+ * return zero if it reaches to the end of the buffer, or non-zero
+ * if successfully copied a line
+ *
+ * the spaces at the beginning and the end of the line are stripped
+ */
+static int get_line_from_fw(char *buf, int size, struct firmware *fw)
+{
+ int len;
+ const char *p = fw->data;
+ while (isspace(*p) && fw->size) {
+ p++;
+ fw->size--;
+ }
+ if (!fw->size)
+ return 0;
+
+ for (len = 0; len < fw->size; len++) {
+ if (!*p)
+ break;
+ if (*p == '\n') {
+ p++;
+ len++;
+ break;
+ }
+ if (len < size)
+ *buf++ = *p++;
+ }
+ *buf = 0;
+ fw->size -= len;
+ fw->data = p;
+ remove_trail_spaces(buf);
+ return 1;
+}
+
+/*
+ * load a "patch" firmware file and parse it
+ */
+int snd_hda_load_patch(struct hda_bus *bus, const char *patch)
+{
+ int err;
+ const struct firmware *fw;
+ struct firmware tmp;
+ char buf[128];
+ struct hda_codec *codec;
+ int line_mode;
+ struct device *dev = bus->card->dev;
+
+ if (snd_BUG_ON(!dev))
+ return -ENODEV;
+ err = request_firmware(&fw, patch, dev);
+ if (err < 0) {
+ printk(KERN_ERR "hda-codec: Cannot load the patch '%s'\n",
+ patch);
+ return err;
+ }
+
+ tmp = *fw;
+ line_mode = LINE_MODE_NONE;
+ codec = NULL;
+ while (get_line_from_fw(buf, sizeof(buf) - 1, &tmp)) {
+ if (!*buf || *buf == '#' || *buf == '\n')
+ continue;
+ if (*buf == '[')
+ line_mode = parse_line_mode(buf, bus);
+ else if (patch_items[line_mode].parser &&
+ (codec || !patch_items[line_mode].need_codec))
+ patch_items[line_mode].parser(buf, bus, &codec);
+ }
+ release_firmware(fw);
+ return 0;
+}
+EXPORT_SYMBOL_HDA(snd_hda_load_patch);
+#endif /* CONFIG_SND_HDA_PATCH_LOADER */
generated by cgit (git 2.34.1) at 2025-01-08 19:30:18 +0000