ALSA: ac97: add AC97 STMicroelectronics' codecs

Add the STMicroelectronics ST7597 codec and an unknown codec
from the same manufacturer found on the Creative SB 128 card (CT4810).

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

2 files changed, 12 insertions, 0 deletions

diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index c1192062300..a7630e9edf8 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -83,6 +83,7 @@ static const struct ac97_codec_id snd_ac97_codec_id_vendors[] = {
 { 0x4e534300, 0xffffff00, "National Semiconductor", NULL, NULL },
 { 0x50534300, 0xffffff00, "Philips",            NULL,   NULL },
 { 0x53494c00, 0xffffff00, "Silicon Laboratory", NULL,   NULL },
+{ 0x53544d00, 0xffffff00, "STMicroelectronics", NULL,   NULL },
 { 0x54524100, 0xffffff00, "TriTech",            NULL,   NULL },
 { 0x54584e00, 0xffffff00, "Texas Instruments",  NULL,   NULL },
 { 0x56494100, 0xffffff00, "VIA Technologies",   NULL,   NULL },
@@ -161,6 +162,7 @@ static const struct ac97_codec_id snd_ac97_codec_ids[] = {
 { 0x4e534350, 0xffffffff, "LM4550",             patch_lm4550,   NULL }, // volume wrap fix 
 { 0x50534304, 0xffffffff, "UCB1400",            patch_ucb1400,  NULL },
 { 0x53494c20, 0xffffffe0, "Si3036,8",           mpatch_si3036,  mpatch_si3036, AC97_MODEM_PATCH },
+{ 0x53544d02, 0xffffffff, "ST7597",             NULL,           NULL },
 { 0x54524102, 0xffffffff, "TR28022",            NULL,           NULL },
 { 0x54524103, 0xffffffff, "TR28023",            NULL,           NULL },
 { 0x54524106, 0xffffffff, "TR28026",            NULL,           NULL },
@@ -213,6 +215,14 @@ static int snd_ac97_valid_reg(struct snd_ac97 *ac97, unsigned short reg)
 {
         /* filter some registers for buggy codecs */
         switch (ac97->id) {
+        case AC97_ID_ST_AC97_ID4:
+                if (reg == 0x08)
+                        return 0;
+                /* fall through */
+        case AC97_ID_ST7597:
+                if (reg == 0x22 || reg == 0x7a)
+                        return 1;
+                /* fall through */
         case AC97_ID_AK4540:
         case AC97_ID_AK4542:
                 if (reg <= 0x1c || reg == 0x20 || reg == 0x26 || reg >= 0x7c)
diff --git a/sound/pci/ac97/ac97_id.h b/sound/pci/ac97/ac97_id.h
index c129492c82b..d603147c4a9 100644
--- a/sound/pci/ac97/ac97_id.h
+++ b/sound/pci/ac97/ac97_id.h
@@ -62,3 +62,5 @@
 #define AC97_ID_CM9761_78       0x434d4978
 #define AC97_ID_CM9761_82       0x434d4982
 #define AC97_ID_CM9761_83       0x434d4983
+#define AC97_ID_ST7597          0x53544d02
+#define AC97_ID_ST_AC97_ID4     0x53544d04