ALSA: ens1371: fix Creative Ectiva support

commit 6ebb8a4a43e34f999ab36f27f972f3cd751cda4f upstream.

To make the EV1938 chip work, add a magic bit and an extra delay.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Tested-by: Tino Schmidt <mailtinoshomepage@gmx.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index c7fba53798138b9ec7604fab68d0861c7434db02..d6a40e2159651690d874a58971dc3c7a239cadbe 100644 (file)
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -229,6 +229,7 @@ MODULE_PARM_DESC(lineio, "Line In to Rear Out (0 = auto, 1 = force).");
 #define ES_REG_1371_CODEC 0x14 /* W/R: Codec Read/Write register address */
 #define   ES_1371_CODEC_RDY       (1<<31)      /* codec ready */
 #define   ES_1371_CODEC_WIP       (1<<30)      /* codec register access in progress */
+#define   EV_1938_CODEC_MAGIC     (1<<26)
 #define   ES_1371_CODEC_PIRD      (1<<23)      /* codec read/write select register */
 #define   ES_1371_CODEC_WRITE(a,d) ((((a)&0x7f)<<16)|(((d)&0xffff)<<0))
 #define   ES_1371_CODEC_READS(a)   ((((a)&0x7f)<<16)|ES_1371_CODEC_PIRD)
@@ -603,12 +604,18 @@ static void snd_es1370_codec_write(struct snd_ak4531 *ak4531,
 
 #ifdef CHIP1371
 
+static inline bool is_ev1938(struct ensoniq *ensoniq)
+{
+       return ensoniq->pci->device == 0x8938;
+}
+
 static void snd_es1371_codec_write(struct snd_ac97 *ac97,
                                   unsigned short reg, unsigned short val)
 {
        struct ensoniq *ensoniq = ac97->private_data;
-       unsigned int t, x;
+       unsigned int t, x, flag;
 
+       flag = is_ev1938(ensoniq) ? EV_1938_CODEC_MAGIC : 0;
        mutex_lock(&ensoniq->src_mutex);
        for (t = 0; t < POLL_COUNT; t++) {
                if (!(inl(ES_REG(ensoniq, 1371_CODEC)) & ES_1371_CODEC_WIP)) {
@@ -630,7 +637,8 @@ static void snd_es1371_codec_write(struct snd_ac97 *ac97,
                                    0x00010000)
                                        break;
                        }
-                       outl(ES_1371_CODEC_WRITE(reg, val), ES_REG(ensoniq, 1371_CODEC));
+                       outl(ES_1371_CODEC_WRITE(reg, val) | flag,
+                            ES_REG(ensoniq, 1371_CODEC));
                        /* restore SRC reg */
                        snd_es1371_wait_src_ready(ensoniq);
                        outl(x, ES_REG(ensoniq, 1371_SMPRATE));
@@ -647,8 +655,9 @@ static unsigned short snd_es1371_codec_read(struct snd_ac97 *ac97,
                                            unsigned short reg)
 {
        struct ensoniq *ensoniq = ac97->private_data;
-       unsigned int t, x, fail = 0;
+       unsigned int t, x, flag, fail = 0;
 
+       flag = is_ev1938(ensoniq) ? EV_1938_CODEC_MAGIC : 0;
       __again:
        mutex_lock(&ensoniq->src_mutex);
        for (t = 0; t < POLL_COUNT; t++) {
@@ -671,7 +680,8 @@ static unsigned short snd_es1371_codec_read(struct snd_ac97 *ac97,
                                    0x00010000)
                                        break;
                        }
-                       outl(ES_1371_CODEC_READS(reg), ES_REG(ensoniq, 1371_CODEC));
+                       outl(ES_1371_CODEC_READS(reg) | flag,
+                            ES_REG(ensoniq, 1371_CODEC));
                        /* restore SRC reg */
                        snd_es1371_wait_src_ready(ensoniq);
                        outl(x, ES_REG(ensoniq, 1371_SMPRATE));
@@ -683,6 +693,11 @@ static unsigned short snd_es1371_codec_read(struct snd_ac97 *ac97,
                        /* now wait for the stinkin' data (RDY) */
                        for (t = 0; t < POLL_COUNT; t++) {
                                if ((x = inl(ES_REG(ensoniq, 1371_CODEC))) & ES_1371_CODEC_RDY) {
+                                       if (is_ev1938(ensoniq)) {
+                                               for (t = 0; t < 100; t++)
+                                                       inl(ES_REG(ensoniq, CONTROL));
+                                               x = inl(ES_REG(ensoniq, 1371_CODEC));
+                                       }
                                        mutex_unlock(&ensoniq->src_mutex);
                                        return ES_1371_CODEC_READ(x);
                                }