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wavefront_fx.c

/*
 *  Copyright (c) 1998-2002 by Paul Davis <pbd@op.net>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <asm/io.h>
#include <linux/init.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/firmware.h>
#include <sound/core.h>
#include <sound/snd_wavefront.h>
#include <sound/initval.h>

/* Control bits for the Load Control Register
 */

#define FX_LSB_TRANSFER 0x01    /* transfer after DSP LSB byte written */
#define FX_MSB_TRANSFER 0x02    /* transfer after DSP MSB byte written */
#define FX_AUTO_INCR    0x04    /* auto-increment DSP address after transfer */

#define WAIT_IDLE 0xff

#ifdef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
#include "yss225.c"
static const struct firmware yss225_registers_firmware = {
      .data = (u8 *)yss225_registers,
      .size = sizeof yss225_registers
};
#endif

static int
wavefront_fx_idle (snd_wavefront_t *dev)

{
      int i;
      unsigned int x = 0x80;

      for (i = 0; i < 1000; i++) {
            x = inb (dev->fx_status);
            if ((x & 0x80) == 0) {
                  break;
            }
      }

      if (x & 0x80) {
            snd_printk ("FX device never idle.\n");
            return 0;
      }

      return (1);
}

static void
wavefront_fx_mute (snd_wavefront_t *dev, int onoff)

{
      if (!wavefront_fx_idle(dev)) {
            return;
      }

      outb (onoff ? 0x02 : 0x00, dev->fx_op);
}

static int
wavefront_fx_memset (snd_wavefront_t *dev,
                 int page,
                 int addr,
                 int cnt,
                 unsigned short *data)
{
      if (page < 0 || page > 7) {
            snd_printk ("FX memset: "
                  "page must be >= 0 and <= 7\n");
            return -(EINVAL);
      }

      if (addr < 0 || addr > 0x7f) {
            snd_printk ("FX memset: "
                  "addr must be >= 0 and <= 7f\n");
            return -(EINVAL);
      }

      if (cnt == 1) {

            outb (FX_LSB_TRANSFER, dev->fx_lcr);
            outb (page, dev->fx_dsp_page);
            outb (addr, dev->fx_dsp_addr);
            outb ((data[0] >> 8), dev->fx_dsp_msb);
            outb ((data[0] & 0xff), dev->fx_dsp_lsb);

            snd_printk ("FX: addr %d:%x set to 0x%x\n",
                  page, addr, data[0]);

      } else {
            int i;

            outb (FX_AUTO_INCR|FX_LSB_TRANSFER, dev->fx_lcr);
            outb (page, dev->fx_dsp_page);
            outb (addr, dev->fx_dsp_addr);

            for (i = 0; i < cnt; i++) {
                  outb ((data[i] >> 8), dev->fx_dsp_msb);
                  outb ((data[i] & 0xff), dev->fx_dsp_lsb);
                  if (!wavefront_fx_idle (dev)) {
                        break;
                  }
            }

            if (i != cnt) {
                  snd_printk ("FX memset "
                            "(0x%x, 0x%x, 0x%lx, %d) incomplete\n",
                            page, addr, (unsigned long) data, cnt);
                  return -(EIO);
            }
      }

      return 0;
}

int
snd_wavefront_fx_detect (snd_wavefront_t *dev)

{
      /* This is a crude check, but its the best one I have for now.
         Certainly on the Maui and the Tropez, wavefront_fx_idle() will
         report "never idle", which suggests that this test should
         work OK.
      */

      if (inb (dev->fx_status) & 0x80) {
            snd_printk ("Hmm, probably a Maui or Tropez.\n");
            return -1;
      }

      return 0;
}

int
snd_wavefront_fx_open (struct snd_hwdep *hw, struct file *file)

{
      if (!try_module_get(hw->card->module))
            return -EFAULT;
      file->private_data = hw;
      return 0;
}

int 
snd_wavefront_fx_release (struct snd_hwdep *hw, struct file *file)

{
      module_put(hw->card->module);
      return 0;
}

int
snd_wavefront_fx_ioctl (struct snd_hwdep *sdev, struct file *file,
                  unsigned int cmd, unsigned long arg)

{
      struct snd_card *card;
      snd_wavefront_card_t *acard;
      snd_wavefront_t *dev;
      wavefront_fx_info r;
      unsigned short *page_data = NULL;
      unsigned short *pd;
      int err = 0;

      snd_assert(sdev->card != NULL, return -ENODEV);
      
      card = sdev->card;

      snd_assert(card->private_data != NULL, return -ENODEV);

      acard = card->private_data;
      dev = &acard->wavefront;

      if (copy_from_user (&r, (void __user *)arg, sizeof (wavefront_fx_info)))
            return -EFAULT;

      switch (r.request) {
      case WFFX_MUTE:
            wavefront_fx_mute (dev, r.data[0]);
            return -EIO;

      case WFFX_MEMSET:
            if (r.data[2] <= 0) {
                  snd_printk ("cannot write "
                        "<= 0 bytes to FX\n");
                  return -EIO;
            } else if (r.data[2] == 1) {
                  pd = (unsigned short *) &r.data[3];
            } else {
                  if (r.data[2] > 256) {
                        snd_printk ("cannot write "
                                  "> 512 bytes to FX\n");
                        return -EIO;
                  }
                  page_data = kmalloc(r.data[2] * sizeof(short), GFP_KERNEL);
                  if (!page_data)
                        return -ENOMEM;
                  if (copy_from_user (page_data,
                                  (unsigned char __user *) r.data[3],
                                  r.data[2] * sizeof(short))) {
                        kfree(page_data);
                        return -EFAULT;
                  }
                  pd = page_data;
            }

            err = wavefront_fx_memset (dev,
                       r.data[0], /* page */
                       r.data[1], /* addr */
                       r.data[2], /* cnt */
                       pd);
            kfree(page_data);
            break;

      default:
            snd_printk ("FX: ioctl %d not yet supported\n",
                      r.request);
            return -ENOTTY;
      }
      return err;
}

/* YSS225 initialization.

   This code was developed using DOSEMU. The Turtle Beach SETUPSND
   utility was run with I/O tracing in DOSEMU enabled, and a reconstruction
   of the port I/O done, using the Yamaha faxback document as a guide
   to add more logic to the code. Its really pretty weird.

   This is the approach of just dumping the whole I/O
   sequence as a series of port/value pairs and a simple loop
   that outputs it.
*/

int __devinit
snd_wavefront_fx_start (snd_wavefront_t *dev)
{
      unsigned int i;
      int err;
      const struct firmware *firmware = NULL;

      if (dev->fx_initialized)
            return 0;

#ifdef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
      firmware = &yss225_registers_firmware;
#else
      err = request_firmware(&firmware, "yamaha/yss225_registers.bin",
                         dev->card->dev);
      if (err < 0) {
            err = -1;
            goto out;
      }
#endif

      for (i = 0; i + 1 < firmware->size; i += 2) {
            if (firmware->data[i] >= 8 && firmware->data[i] < 16) {
                  outb(firmware->data[i + 1],
                       dev->base + firmware->data[i]);
            } else if (firmware->data[i] == WAIT_IDLE) {
                  if (!wavefront_fx_idle(dev)) {
                        err = -1;
                        goto out;
                  }
            } else {
                  snd_printk(KERN_ERR "invalid address"
                           " in register data\n");
                  err = -1;
                  goto out;
            }
      }

      dev->fx_initialized = 1;
      err = 0;

out:
#ifndef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
      release_firmware(firmware);
#endif
      return err;
}

#ifndef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
MODULE_FIRMWARE("yamaha/yss225_registers.bin");
#endif

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