+static int wait_for_codec(struct fm801 *chip, unsigned int codec_id,
+ unsigned short reg, unsigned long waits)
+{
+ unsigned long timeout = jiffies + waits;
+
+ outw(FM801_AC97_READ | (codec_id << FM801_AC97_ADDR_SHIFT) | reg,
+ FM801_REG(chip, AC97_CMD));
+ udelay(5);
+ do {
+ if ((inw(FM801_REG(chip, AC97_CMD)) & (FM801_AC97_VALID|FM801_AC97_BUSY))
+ == FM801_AC97_VALID)
+ return 0;
+ schedule_timeout_uninterruptible(1);
+ } while (time_after(timeout, jiffies));
+ return -EIO;
+}
+
+static int snd_fm801_chip_init(struct fm801 *chip, int resume)
+{
+ int id;
+ unsigned short cmdw;
+
+ if (chip->tea575x_tuner & 0x0010)
+ goto __ac97_ok;
+
+ /* codec cold reset + AC'97 warm reset */
+ outw((1<<5) | (1<<6), FM801_REG(chip, CODEC_CTRL));
+ inw(FM801_REG(chip, CODEC_CTRL)); /* flush posting data */
+ udelay(100);
+ outw(0, FM801_REG(chip, CODEC_CTRL));
+
+ if (wait_for_codec(chip, 0, AC97_RESET, msecs_to_jiffies(750)) < 0) {
+ snd_printk(KERN_ERR "Primary AC'97 codec not found\n");
+ if (! resume)
+ return -EIO;
+ }
+
+ if (chip->multichannel) {
+ if (chip->secondary_addr) {
+ wait_for_codec(chip, chip->secondary_addr,
+ AC97_VENDOR_ID1, msecs_to_jiffies(50));
+ } else {
+ /* my card has the secondary codec */
+ /* at address #3, so the loop is inverted */
+ for (id = 3; id > 0; id--) {
+ if (! wait_for_codec(chip, id, AC97_VENDOR_ID1,
+ msecs_to_jiffies(50))) {
+ cmdw = inw(FM801_REG(chip, AC97_DATA));
+ if (cmdw != 0xffff && cmdw != 0) {
+ chip->secondary = 1;
+ chip->secondary_addr = id;
+ break;
+ }
+ }
+ }
+ }
+
+ /* the recovery phase, it seems that probing for non-existing codec might */
+ /* cause timeout problems */
+ wait_for_codec(chip, 0, AC97_VENDOR_ID1, msecs_to_jiffies(750));
+ }
+
+ __ac97_ok:
+
+ /* init volume */
+ outw(0x0808, FM801_REG(chip, PCM_VOL));
+ outw(0x9f1f, FM801_REG(chip, FM_VOL));
+ outw(0x8808, FM801_REG(chip, I2S_VOL));
+
+ /* I2S control - I2S mode */
+ outw(0x0003, FM801_REG(chip, I2S_MODE));
+
+ /* interrupt setup */
+ cmdw = inw(FM801_REG(chip, IRQ_MASK));
+ if (chip->irq < 0)
+ cmdw |= 0x00c3; /* mask everything, no PCM nor MPU */
+ else
+ cmdw &= ~0x0083; /* unmask MPU, PLAYBACK & CAPTURE */
+ outw(cmdw, FM801_REG(chip, IRQ_MASK));
+
+ /* interrupt clear */
+ outw(FM801_IRQ_PLAYBACK|FM801_IRQ_CAPTURE|FM801_IRQ_MPU, FM801_REG(chip, IRQ_STATUS));
+
+ return 0;
+}
+
+
+static int snd_fm801_free(struct fm801 *chip)