diff options
author | Takashi Iwai <tiwai@suse.de> | 2009-06-17 09:52:54 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2009-06-24 11:53:43 +0200 |
commit | 4ea6fbc8eb23c3ae5fd2fb55a340ab85c8649bce (patch) | |
tree | 8e13b14c449c13047d92f7bed84d4e83eebb96ce /sound/pci/hda/hda_hwdep.c | |
parent | a1e21c9078fb8005e5accb921696ec9e2f38176e (diff) | |
download | linux-4ea6fbc8eb23c3ae5fd2fb55a340ab85c8649bce.tar.bz2 |
ALSA: hda - Add patch module option
Added the patch module option to apply a "patch" as a firmware to
modify pin configurations or give additional hints to the driver
before actually initializing and configuring the codec.
This can be used as a workaround when the BIOS doesn't give sufficient
information or give wrong information that doesn't match with the real
hardware setup, until it's fixed statically in the driver via a quirk.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_hwdep.c')
-rw-r--r-- | sound/pci/hda/hda_hwdep.c | 236 |
1 files changed, 217 insertions, 19 deletions
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c index 6812fbe80fa4..cc24e6721d74 100644 --- a/sound/pci/hda/hda_hwdep.c +++ b/sound/pci/hda/hda_hwdep.c @@ -24,6 +24,7 @@ #include <linux/compat.h> #include <linux/mutex.h> #include <linux/ctype.h> +#include <linux/firmware.h> #include <sound/core.h> #include "hda_codec.h" #include "hda_local.h" @@ -312,12 +313,8 @@ static ssize_t init_verbs_show(struct device *dev, return len; } -static ssize_t init_verbs_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) +static int parse_init_verbs(struct hda_codec *codec, const char *buf) { - struct snd_hwdep *hwdep = dev_get_drvdata(dev); - struct hda_codec *codec = hwdep->private_data; struct hda_verb *v; int nid, verb, param; @@ -331,6 +328,18 @@ static ssize_t init_verbs_store(struct device *dev, 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; } @@ -376,19 +385,15 @@ static void remove_trail_spaces(char *str) #define MAX_HINTS 1024 -static ssize_t hints_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) +static int parse_hints(struct hda_codec *codec, const char *buf) { - 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; + return 0; if (*buf == '=') return -EINVAL; key = kstrndup_noeol(buf, 1024); @@ -411,7 +416,7 @@ static ssize_t hints_store(struct device *dev, kfree(hint->key); hint->key = key; hint->val = val; - return count; + return 0; } /* allocate a new hint entry */ if (codec->hints.used >= MAX_HINTS) @@ -424,6 +429,18 @@ static ssize_t hints_store(struct device *dev, } 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; } @@ -469,20 +486,24 @@ static ssize_t driver_pin_configs_show(struct device *dev, #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) +static int parse_user_pin_configs(struct hda_codec *codec, const char *buf) { - 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); + 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; @@ -553,3 +574,180 @@ int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key) 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, + 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) +{ + unsigned 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 (codec->addr == caddr) { + *codecp = codec; + break; + } + } + } +} + +/* parse the contents after the other command tags, [pincfg], [verb], + * [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) +{ + if (!*codecp) + return; + parse_user_pin_configs(*codecp, buf); +} + +static void parse_verb_mode(char *buf, struct hda_bus *bus, + struct hda_codec **codecp) +{ + if (!*codecp) + return; + parse_init_verbs(*codecp, buf); +} + +static void parse_hint_mode(char *buf, struct hda_bus *bus, + struct hda_codec **codecp) +{ + if (!*codecp) + return; + parse_hints(*codecp, buf); +} + +static void parse_model_mode(char *buf, struct hda_bus *bus, + struct hda_codec **codecp) +{ + if (!*codecp) + return; + kfree((*codecp)->modelname); + (*codecp)->modelname = kstrdup(buf, GFP_KERNEL); +} + +struct hda_patch_item { + const char *tag; + void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc); +}; + +static struct hda_patch_item patch_items[NUM_LINE_MODES] = { + [LINE_MODE_CODEC] = { "[codec]", parse_codec_mode }, + [LINE_MODE_MODEL] = { "[model]", parse_model_mode }, + [LINE_MODE_VERB] = { "[verb]", parse_verb_mode }, + [LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode }, + [LINE_MODE_HINT] = { "[hint]", parse_hint_mode }, +}; + +/* 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; + if (size < fw->size) + size = fw->size; + + 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) + 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 */ |