EN_D
WR(ctx, AC97_ENABLE, EN_D | EN_CE);
WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
WR(ctx, AC97_ENABLE, EN_D | EN_CE);
WR(ctx, I2S_ENABLE, EN_D | EN_CE);
WR(ctx, I2S_ENABLE, EN_D); /* power off */
WR(ctx, I2S_ENABLE, EN_D); /* clock off, disable */
WR(ctx, I2S_ENABLE, EN_D); /* clock off, disable */