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oss_envy24ht/envy24ht_ac97.c

Low level routines for AC97 based Envy24HT boards (mainly Envy24-PT).

Description

This file is part of Open Sound System.

Copyright (C) 4Front Technologies 1996-2008.

This this source file is released under GPL v2 license (no other versions). See the COPYING file included in the main directory of this source distribution for the license terms and conditions. 


#include "oss_envy24ht_cfg.h"

#include "spdif.h"
#include "envy24ht.h"

#define AKM_ADDRESS 0x10
#if 0
# define PRT_STATUS(v) outb(v&0xff, 0x378)
#else
# define PRT_STATUS(v)
#endif

#if 0
static unsigned char
i2c_read (envy24ht_devc * devc, unsigned char addr, unsigned char pos)
{
  int i;
  unsigned char data;
  oss_native_word flags;

  MUTEX_ENTER_IRQDISABLE (devc->low_mutex, flags);
  OUTB (devc->osdev, pos, devc->ccs_base + 0x11);	/* Offset */
  OUTB (devc->osdev, addr << 1, devc->ccs_base + 0x10);	/* Read address  */

  for (i = 0; i < 2000; i++)
    {
      unsigned char status = INB (devc->osdev, devc->ccs_base + 0x13);
      if (!(status & 1))
	break;

    }

  oss_udelay (1);
  data = INB (devc->osdev, devc->ccs_base + 0x12);
  MUTEX_EXIT_IRQRESTORE (devc->low_mutex, flags);

  return data;
}

static void
i2c_write (envy24ht_devc * devc, unsigned char addr, unsigned char pos,
	   unsigned char data)
{
  int i;
  oss_native_word flags;

  MUTEX_ENTER_IRQDISABLE (devc->low_mutex, flags);
  OUTB (devc->osdev, pos, devc->ccs_base + 0x11);	/* Offset */
  OUTB (devc->osdev, data, devc->ccs_base + 0x12);	/* Data */
  OUTB (devc->osdev, (addr << 1) | 1, devc->ccs_base + 0x10);	/* Write address  */

  for (i = 0; i < 2000; i++)
    {
      unsigned char status = INB (devc->osdev, devc->ccs_base + 0x13);
      if (!(status & 1))
	break;

    }
  MUTEX_EXIT_IRQRESTORE (devc->low_mutex, flags);
}
#endif

/*ARGSUSED*/ 
static void
init_cs8415a (envy24ht_devc * devc)
{
}

/*ARGSUSED*/ 
static void
init_wm8728 (envy24ht_devc * devc)
{

#if 0
  printk ("Regs=");
  for (i = 0; i < 0x18; i++)
    {
      PRT_STATUS (2);
      printk ("%02x ", i2c_read (devc, addr, i));
      PRT_STATUS (0);
    }
  printk ("\n");
#endif
}

static void
ac97_card_init (envy24ht_devc * devc)
{

  PRT_STATUS (0);
  PRT_STATUS (0x01);
  PRT_STATUS (0);

  OUTW (devc->osdev, 0x000f, devc->ccs_base + 0x14);	/* GPIO */

  oss_udelay (1000);

  devc->recsrc = 0;
  init_cs8415a (devc);
  init_wm8728 (devc);
}

/*ARGSUSED*/ 
static int
ac97_mixer_init (envy24ht_devc * devc, int dev, int group)
{
  return 0;
}

#if 0
static int
ac97_private1 (envy24ht_devc * devc, int value)
{
  i2c_write (devc, AKM_ADDRESS, (value >> 8) & 0xff, value & 0xff);
  return 0;
}
#endif

envy24ht_auxdrv_t envy24ht_ac97_auxdrv = {
  ac97_card_init,
  ac97_mixer_init
};
Copyright (C) 4Front Technologies, 2007. All rights reserved.

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Copyright (C) 4Front Technologies, 2007. All rights reserved.
Back to index OSS web site