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saa7134-oss.c

/*
 *
 * device driver for philips saa7134 based TV cards
 * oss dsp interface
 *
 * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 *     2005 conversion to standalone module:
 *         Ricardo Cerqueira <v4l@cerqueira.org>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/sound.h>
#include <linux/soundcard.h>

#include "saa7134-reg.h"
#include "saa7134.h"

/* ------------------------------------------------------------------ */

static unsigned int debug  = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"enable debug messages [oss]");

static unsigned int rate  = 0;
module_param(rate, int, 0444);
MODULE_PARM_DESC(rate,"sample rate (valid are: 32000,48000)");

static unsigned int dsp_nr[]   = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
MODULE_PARM_DESC(dsp_nr, "device numbers for SAA7134 capture interface(s).");
module_param_array(dsp_nr,   int, NULL, 0444);

static unsigned int mixer_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
MODULE_PARM_DESC(mixer_nr, "mixer numbers for SAA7134 capture interface(s).");
module_param_array(mixer_nr, int, NULL, 0444);

#define dprintk(fmt, arg...)  if (debug) \
      printk(KERN_DEBUG "%s/oss: " fmt, dev->name , ## arg)


/* ------------------------------------------------------------------ */

static int dsp_buffer_conf(struct saa7134_dev *dev, int blksize, int blocks)
{
      if (blksize < 0x100)
            blksize = 0x100;
      if (blksize > 0x10000)
            blksize = 0x10000;

      if (blocks < 2)
            blocks = 2;
      if ((blksize * blocks) > 1024*1024)
            blocks = 1024*1024 / blksize;

      dev->dmasound.blocks  = blocks;
      dev->dmasound.blksize = blksize;
      dev->dmasound.bufsize = blksize * blocks;

      dprintk("buffer config: %d blocks / %d bytes, %d kB total\n",
            blocks,blksize,blksize * blocks / 1024);
      return 0;
}

static int dsp_buffer_init(struct saa7134_dev *dev)
{
      int err;

      BUG_ON(!dev->dmasound.bufsize);
      videobuf_dma_init(&dev->dmasound.dma);
      err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
                               (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
      if (0 != err)
            return err;
      return 0;
}

static int dsp_buffer_free(struct saa7134_dev *dev)
{
      BUG_ON(!dev->dmasound.blksize);
      videobuf_dma_free(&dev->dmasound.dma);
      dev->dmasound.blocks  = 0;
      dev->dmasound.blksize = 0;
      dev->dmasound.bufsize = 0;
      return 0;
}

static void dsp_dma_start(struct saa7134_dev *dev)
{
      dev->dmasound.dma_blk     = 0;
      dev->dmasound.dma_running = 1;
      saa7134_set_dmabits(dev);
}

static void dsp_dma_stop(struct saa7134_dev *dev)
{
      dev->dmasound.dma_blk     = -1;
      dev->dmasound.dma_running = 0;
      saa7134_set_dmabits(dev);
}

static int dsp_rec_start(struct saa7134_dev *dev)
{
      int err, bswap, sign;
      u32 fmt, control;
      unsigned long flags;

      /* prepare buffer */
      if (0 != (err = videobuf_pci_dma_map(dev->pci,&dev->dmasound.dma)))
            return err;
      if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt)))
            goto fail1;
      if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
                                    dev->dmasound.dma.sglist,
                                    dev->dmasound.dma.sglen,
                                    0)))
            goto fail2;

      /* sample format */
      switch (dev->dmasound.afmt) {
      case AFMT_U8:
      case AFMT_S8:     fmt = 0x00;  break;
      case AFMT_U16_LE:
      case AFMT_U16_BE:
      case AFMT_S16_LE:
      case AFMT_S16_BE: fmt = 0x01;  break;
      default:
            err = -EINVAL;
            goto fail2;
      }

      switch (dev->dmasound.afmt) {
      case AFMT_S8:
      case AFMT_S16_LE:
      case AFMT_S16_BE: sign = 1; break;
      default:          sign = 0; break;
      }

      switch (dev->dmasound.afmt) {
      case AFMT_U16_BE:
      case AFMT_S16_BE: bswap = 1; break;
      default:          bswap = 0; break;
      }

      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            if (1 == dev->dmasound.channels)
                  fmt |= (1 << 3);
            if (2 == dev->dmasound.channels)
                  fmt |= (3 << 3);
            if (sign)
                  fmt |= 0x04;
            fmt |= (TV == dev->dmasound.input) ? 0xc0 : 0x80;

            saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
            saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
            saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
            saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);

            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            if (1 == dev->dmasound.channels)
                  fmt |= (1 << 4);
            if (2 == dev->dmasound.channels)
                  fmt |= (2 << 4);
            if (!sign)
                  fmt |= 0x04;
            saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -4);
            saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
            break;
      }
      dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
            dev->dmasound.afmt, dev->dmasound.channels, fmt,
            bswap ? 'b' : '-');

      /* dma: setup channel 6 (= AUDIO) */
      control = SAA7134_RS_CONTROL_BURST_16 |
            SAA7134_RS_CONTROL_ME |
            (dev->dmasound.pt.dma >> 12);
      if (bswap)
            control |= SAA7134_RS_CONTROL_BSWAP;
      saa_writel(SAA7134_RS_BA1(6),0);
      saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
      saa_writel(SAA7134_RS_PITCH(6),0);
      saa_writel(SAA7134_RS_CONTROL(6),control);

      /* start dma */
      dev->dmasound.recording_on = 1;
      spin_lock_irqsave(&dev->slock,flags);
      dsp_dma_start(dev);
      spin_unlock_irqrestore(&dev->slock,flags);
      return 0;

 fail2:
      saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
 fail1:
      videobuf_pci_dma_unmap(dev->pci,&dev->dmasound.dma);
      return err;
}

static int dsp_rec_stop(struct saa7134_dev *dev)
{
      unsigned long flags;

      dprintk("rec_stop dma_blk=%d\n",dev->dmasound.dma_blk);

      /* stop dma */
      dev->dmasound.recording_on = 0;
      spin_lock_irqsave(&dev->slock,flags);
      dsp_dma_stop(dev);
      spin_unlock_irqrestore(&dev->slock,flags);

      /* unlock buffer */
      saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
      videobuf_pci_dma_unmap(dev->pci,&dev->dmasound.dma);
      return 0;
}

/* ------------------------------------------------------------------ */

static int dsp_open(struct inode *inode, struct file *file)
{
      int minor = iminor(inode);
      struct saa7134_dev *dev;
      int err;

      list_for_each_entry(dev, &saa7134_devlist, devlist)
            if (dev->dmasound.minor_dsp == minor)
                  goto found;
      return -ENODEV;
 found:

      mutex_lock(&dev->dmasound.lock);
      err = -EBUSY;
      if (dev->dmasound.users_dsp)
            goto fail1;
      dev->dmasound.users_dsp++;
      file->private_data = dev;

      dev->dmasound.afmt        = AFMT_U8;
      dev->dmasound.channels    = 1;
      dev->dmasound.read_count  = 0;
      dev->dmasound.read_offset = 0;
      dsp_buffer_conf(dev,PAGE_SIZE,64);
      err = dsp_buffer_init(dev);
      if (0 != err)
            goto fail2;

      mutex_unlock(&dev->dmasound.lock);
      return 0;

 fail2:
      dev->dmasound.users_dsp--;
 fail1:
      mutex_unlock(&dev->dmasound.lock);
      return err;
}

static int dsp_release(struct inode *inode, struct file *file)
{
      struct saa7134_dev *dev = file->private_data;

      mutex_lock(&dev->dmasound.lock);
      if (dev->dmasound.recording_on)
            dsp_rec_stop(dev);
      dsp_buffer_free(dev);
      dev->dmasound.users_dsp--;
      file->private_data = NULL;
      mutex_unlock(&dev->dmasound.lock);
      return 0;
}

static ssize_t dsp_read(struct file *file, char __user *buffer,
                  size_t count, loff_t *ppos)
{
      struct saa7134_dev *dev = file->private_data;
      DECLARE_WAITQUEUE(wait, current);
      unsigned int bytes;
      unsigned long flags;
      int err,ret = 0;

      add_wait_queue(&dev->dmasound.wq, &wait);
      mutex_lock(&dev->dmasound.lock);
      while (count > 0) {
            /* wait for data if needed */
            if (0 == dev->dmasound.read_count) {
                  if (!dev->dmasound.recording_on) {
                        err = dsp_rec_start(dev);
                        if (err < 0) {
                              if (0 == ret)
                                    ret = err;
                              break;
                        }
                  }
                  if (dev->dmasound.recording_on &&
                      !dev->dmasound.dma_running) {
                        /* recover from overruns */
                        spin_lock_irqsave(&dev->slock,flags);
                        dsp_dma_start(dev);
                        spin_unlock_irqrestore(&dev->slock,flags);
                  }
                  if (file->f_flags & O_NONBLOCK) {
                        if (0 == ret)
                              ret = -EAGAIN;
                        break;
                  }
                  mutex_unlock(&dev->dmasound.lock);
                  set_current_state(TASK_INTERRUPTIBLE);
                  if (0 == dev->dmasound.read_count)
                        schedule();
                  set_current_state(TASK_RUNNING);
                  mutex_lock(&dev->dmasound.lock);
                  if (signal_pending(current)) {
                        if (0 == ret)
                              ret = -EINTR;
                        break;
                  }
            }

            /* copy data to userspace */
            bytes = count;
            if (bytes > dev->dmasound.read_count)
                  bytes = dev->dmasound.read_count;
            if (bytes > dev->dmasound.bufsize - dev->dmasound.read_offset)
                  bytes = dev->dmasound.bufsize - dev->dmasound.read_offset;
            if (copy_to_user(buffer + ret,
                         dev->dmasound.dma.vmalloc + dev->dmasound.read_offset,
                         bytes)) {
                  if (0 == ret)
                        ret = -EFAULT;
                  break;
            }

            ret   += bytes;
            count -= bytes;
            dev->dmasound.read_count  -= bytes;
            dev->dmasound.read_offset += bytes;
            if (dev->dmasound.read_offset == dev->dmasound.bufsize)
                  dev->dmasound.read_offset = 0;
      }
      mutex_unlock(&dev->dmasound.lock);
      remove_wait_queue(&dev->dmasound.wq, &wait);
      return ret;
}

static ssize_t dsp_write(struct file *file, const char __user *buffer,
                   size_t count, loff_t *ppos)
{
      return -EINVAL;
}

static const char *osspcm_ioctls[] = {
      "RESET", "SYNC", "SPEED", "STEREO", "GETBLKSIZE", "SETFMT",
      "CHANNELS", "?", "POST", "SUBDIVIDE", "SETFRAGMENT", "GETFMTS",
      "GETOSPACE", "GETISPACE", "NONBLOCK", "GETCAPS", "GET/SETTRIGGER",
      "GETIPTR", "GETOPTR", "MAPINBUF", "MAPOUTBUF", "SETSYNCRO",
      "SETDUPLEX", "GETODELAY"
};
#define OSSPCM_IOCTLS ARRAY_SIZE(osspcm_ioctls)

static void saa7134_oss_print_ioctl(char *name, unsigned int cmd)
{
      char *dir;

      switch (_IOC_DIR(cmd)) {
      case _IOC_NONE:              dir = "--"; break;
      case _IOC_READ:              dir = "r-"; break;
      case _IOC_WRITE:             dir = "-w"; break;
      case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
      default:                     dir = "??"; break;
      }
      switch (_IOC_TYPE(cmd)) {
      case 'P':
            printk(KERN_DEBUG "%s: ioctl 0x%08x (oss dsp, %s, SNDCTL_DSP_%s)\n",
                   name, cmd, dir, (_IOC_NR(cmd) < OSSPCM_IOCTLS) ?
                   osspcm_ioctls[_IOC_NR(cmd)] : "???");
            break;
      case 'M':
            printk(KERN_DEBUG "%s: ioctl 0x%08x (oss mixer, %s, #%d)\n",
                   name, cmd, dir, _IOC_NR(cmd));
            break;
      default:
            printk(KERN_DEBUG "%s: ioctl 0x%08x (???, %s, #%d)\n",
                   name, cmd, dir, _IOC_NR(cmd));
      }
}

static int dsp_ioctl(struct inode *inode, struct file *file,
                 unsigned int cmd, unsigned long arg)
{
      struct saa7134_dev *dev = file->private_data;
      void __user *argp = (void __user *) arg;
      int __user *p = argp;
      int val = 0;

      if (debug > 1)
            saa7134_oss_print_ioctl(dev->name,cmd);
      switch (cmd) {
      case OSS_GETVERSION:
            return put_user(SOUND_VERSION, p);
      case SNDCTL_DSP_GETCAPS:
            return 0;

      case SNDCTL_DSP_SPEED:
            if (get_user(val, p))
                  return -EFAULT;
            /* fall through */
      case SOUND_PCM_READ_RATE:
            return put_user(dev->dmasound.rate, p);

      case SNDCTL_DSP_STEREO:
            if (get_user(val, p))
                  return -EFAULT;
            mutex_lock(&dev->dmasound.lock);
            dev->dmasound.channels = val ? 2 : 1;
            if (dev->dmasound.recording_on) {
                  dsp_rec_stop(dev);
                  dsp_rec_start(dev);
            }
            mutex_unlock(&dev->dmasound.lock);
            return put_user(dev->dmasound.channels-1, p);

      case SNDCTL_DSP_CHANNELS:
            if (get_user(val, p))
                  return -EFAULT;
            if (val != 1 && val != 2)
                  return -EINVAL;
            mutex_lock(&dev->dmasound.lock);
            dev->dmasound.channels = val;
            if (dev->dmasound.recording_on) {
                  dsp_rec_stop(dev);
                  dsp_rec_start(dev);
            }
            mutex_unlock(&dev->dmasound.lock);
            /* fall through */
      case SOUND_PCM_READ_CHANNELS:
            return put_user(dev->dmasound.channels, p);

      case SNDCTL_DSP_GETFMTS: /* Returns a mask */
            return put_user(AFMT_U8     | AFMT_S8     |
                        AFMT_U16_LE | AFMT_U16_BE |
                        AFMT_S16_LE | AFMT_S16_BE, p);

      case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
            if (get_user(val, p))
                  return -EFAULT;
            switch (val) {
            case AFMT_QUERY:
                  /* nothing to do */
                  break;
            case AFMT_U8:
            case AFMT_S8:
            case AFMT_U16_LE:
            case AFMT_U16_BE:
            case AFMT_S16_LE:
            case AFMT_S16_BE:
                  mutex_lock(&dev->dmasound.lock);
                  dev->dmasound.afmt = val;
                  if (dev->dmasound.recording_on) {
                        dsp_rec_stop(dev);
                        dsp_rec_start(dev);
                  }
                  mutex_unlock(&dev->dmasound.lock);
                  return put_user(dev->dmasound.afmt, p);
            default:
                  return -EINVAL;
            }

      case SOUND_PCM_READ_BITS:
            switch (dev->dmasound.afmt) {
            case AFMT_U8:
            case AFMT_S8:
                  return put_user(8, p);
            case AFMT_U16_LE:
            case AFMT_U16_BE:
            case AFMT_S16_LE:
            case AFMT_S16_BE:
                  return put_user(16, p);
            default:
                  return -EINVAL;
            }

      case SNDCTL_DSP_NONBLOCK:
            file->f_flags |= O_NONBLOCK;
            return 0;

      case SNDCTL_DSP_RESET:
            mutex_lock(&dev->dmasound.lock);
            if (dev->dmasound.recording_on)
                  dsp_rec_stop(dev);
            mutex_unlock(&dev->dmasound.lock);
            return 0;
      case SNDCTL_DSP_GETBLKSIZE:
            return put_user(dev->dmasound.blksize, p);

      case SNDCTL_DSP_SETFRAGMENT:
            if (get_user(val, p))
                  return -EFAULT;
            if (dev->dmasound.recording_on)
                  return -EBUSY;
            dsp_buffer_free(dev);
            /* used to be arg >> 16 instead of val >> 16; fixed */
            dsp_buffer_conf(dev,1 << (val & 0xffff), (val >> 16) & 0xffff);
            dsp_buffer_init(dev);
            return 0;

      case SNDCTL_DSP_SYNC:
            /* NOP */
            return 0;

      case SNDCTL_DSP_GETISPACE:
      {
            audio_buf_info info;
            info.fragsize   = dev->dmasound.blksize;
            info.fragstotal = dev->dmasound.blocks;
            info.bytes      = dev->dmasound.read_count;
            info.fragments  = info.bytes / info.fragsize;
            if (copy_to_user(argp, &info, sizeof(info)))
                  return -EFAULT;
            return 0;
      }
      default:
            return -EINVAL;
      }
}

static unsigned int dsp_poll(struct file *file, struct poll_table_struct *wait)
{
      struct saa7134_dev *dev = file->private_data;
      unsigned int mask = 0;

      poll_wait(file, &dev->dmasound.wq, wait);

      if (0 == dev->dmasound.read_count) {
            mutex_lock(&dev->dmasound.lock);
            if (!dev->dmasound.recording_on)
                  dsp_rec_start(dev);
            mutex_unlock(&dev->dmasound.lock);
      } else
            mask |= (POLLIN | POLLRDNORM);
      return mask;
}

const struct file_operations saa7134_dsp_fops = {
      .owner   = THIS_MODULE,
      .open    = dsp_open,
      .release = dsp_release,
      .read    = dsp_read,
      .write   = dsp_write,
      .ioctl   = dsp_ioctl,
      .poll    = dsp_poll,
      .llseek  = no_llseek,
};

/* ------------------------------------------------------------------ */

static int
mixer_recsrc_7134(struct saa7134_dev *dev)
{
      int analog_io,rate;

      switch (dev->dmasound.input) {
      case TV:
            saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
            saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
            break;
      case LINE1:
      case LINE2:
      case LINE2_LEFT:
            analog_io = (LINE1 == dev->dmasound.input) ? 0x00 : 0x08;
            rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
            saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
            saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
            saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
            break;
      }
      return 0;
}

static int
mixer_recsrc_7133(struct saa7134_dev *dev)
{
      u32 anabar, xbarin;

      xbarin = 0x03; // adc
    anabar = 0;
      switch (dev->dmasound.input) {
      case TV:
            xbarin = 0; // Demodulator
      anabar = 2; // DACs
            break;
      case LINE1:
            anabar = 0;  // aux1, aux1
            break;
      case LINE2:
      case LINE2_LEFT:
            anabar = 9;  // aux2, aux2
            break;
      }
    /* output xbar always main channel */
      saa_dsp_writel(dev, 0x46c >> 2, 0xbbbb10);
      saa_dsp_writel(dev, 0x464 >> 2, xbarin);
      saa_writel(0x594 >> 2, anabar);

      return 0;
}

static int
mixer_recsrc(struct saa7134_dev *dev, enum saa7134_audio_in src)
{
      static const char *iname[] = { "Oops", "TV", "LINE1", "LINE2" };

      dev->dmasound.count++;
      dev->dmasound.input = src;
      dprintk("mixer input = %s\n",iname[dev->dmasound.input]);

      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            mixer_recsrc_7134(dev);
            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            mixer_recsrc_7133(dev);
            break;
      }
      return 0;
}

static int
mixer_level(struct saa7134_dev *dev, enum saa7134_audio_in src, int level)
{
      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            switch (src) {
            case TV:
                  /* nothing */
                  break;
            case LINE1:
                  saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
                           (100 == level) ? 0x00 : 0x10);
                  break;
            case LINE2:
            case LINE2_LEFT:
                  saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
                           (100 == level) ? 0x00 : 0x20);
                  break;
            }
            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            /* nothing */
            break;
      }
      return 0;
}

/* ------------------------------------------------------------------ */

static int mixer_open(struct inode *inode, struct file *file)
{
      int minor = iminor(inode);
      struct saa7134_dev *dev;

      list_for_each_entry(dev, &saa7134_devlist, devlist)
            if (dev->dmasound.minor_mixer == minor) {
                  file->private_data = dev;
                  return 0;
            }
      return -ENODEV;
}

static int mixer_release(struct inode *inode, struct file *file)
{
      file->private_data = NULL;
      return 0;
}

static int mixer_ioctl(struct inode *inode, struct file *file,
                 unsigned int cmd, unsigned long arg)
{
      struct saa7134_dev *dev = file->private_data;
      enum saa7134_audio_in input;
      int val,ret;
      void __user *argp = (void __user *) arg;
      int __user *p = argp;

      if (debug > 1)
            saa7134_oss_print_ioctl(dev->name,cmd);
      switch (cmd) {
      case OSS_GETVERSION:
            return put_user(SOUND_VERSION, p);
      case SOUND_MIXER_INFO:
      {
            mixer_info info;
            memset(&info,0,sizeof(info));
            strlcpy(info.id,   "TV audio", sizeof(info.id));
            strlcpy(info.name, dev->name,  sizeof(info.name));
            info.modify_counter = dev->dmasound.count;
            if (copy_to_user(argp, &info, sizeof(info)))
                  return -EFAULT;
            return 0;
      }
      case SOUND_OLD_MIXER_INFO:
      {
            _old_mixer_info info;
            memset(&info,0,sizeof(info));
            strlcpy(info.id,   "TV audio", sizeof(info.id));
            strlcpy(info.name, dev->name,  sizeof(info.name));
            if (copy_to_user(argp, &info, sizeof(info)))
                  return -EFAULT;
            return 0;
      }
      case MIXER_READ(SOUND_MIXER_CAPS):
            return put_user(SOUND_CAP_EXCL_INPUT, p);
      case MIXER_READ(SOUND_MIXER_STEREODEVS):
            return put_user(0, p);
      case MIXER_READ(SOUND_MIXER_RECMASK):
      case MIXER_READ(SOUND_MIXER_DEVMASK):
            val = SOUND_MASK_LINE1 | SOUND_MASK_LINE2;
            if (32000 == dev->dmasound.rate)
                  val |= SOUND_MASK_VIDEO;
            return put_user(val, p);

      case MIXER_WRITE(SOUND_MIXER_RECSRC):
            if (get_user(val, p))
                  return -EFAULT;
            input = dev->dmasound.input;
            if (32000 == dev->dmasound.rate  &&
                val & SOUND_MASK_VIDEO  &&  dev->dmasound.input != TV)
                  input = TV;
            if (val & SOUND_MASK_LINE1  &&  dev->dmasound.input != LINE1)
                  input = LINE1;
            if (val & SOUND_MASK_LINE2  &&  dev->dmasound.input != LINE2)
                  input = LINE2;
            if (input != dev->dmasound.input)
                  mixer_recsrc(dev,input);
            /* fall throuth */
      case MIXER_READ(SOUND_MIXER_RECSRC):
            switch (dev->dmasound.input) {
            case TV:    ret = SOUND_MASK_VIDEO; break;
            case LINE1: ret = SOUND_MASK_LINE1; break;
            case LINE2: ret = SOUND_MASK_LINE2; break;
            default:    ret = 0;
            }
            return put_user(ret, p);

      case MIXER_WRITE(SOUND_MIXER_VIDEO):
      case MIXER_READ(SOUND_MIXER_VIDEO):
            if (32000 != dev->dmasound.rate)
                  return -EINVAL;
            return put_user(100 | 100 << 8, p);

      case MIXER_WRITE(SOUND_MIXER_LINE1):
            if (get_user(val, p))
                  return -EFAULT;
            val &= 0xff;
            val = (val <= 50) ? 50 : 100;
            dev->dmasound.line1 = val;
            mixer_level(dev,LINE1,dev->dmasound.line1);
            /* fall throuth */
      case MIXER_READ(SOUND_MIXER_LINE1):
            return put_user(dev->dmasound.line1 | dev->dmasound.line1 << 8, p);

      case MIXER_WRITE(SOUND_MIXER_LINE2):
            if (get_user(val, p))
                  return -EFAULT;
            val &= 0xff;
            val = (val <= 50) ? 50 : 100;
            dev->dmasound.line2 = val;
            mixer_level(dev,LINE2,dev->dmasound.line2);
            /* fall throuth */
      case MIXER_READ(SOUND_MIXER_LINE2):
            return put_user(dev->dmasound.line2 | dev->dmasound.line2 << 8, p);

      default:
            return -EINVAL;
      }
}

const struct file_operations saa7134_mixer_fops = {
      .owner   = THIS_MODULE,
      .open    = mixer_open,
      .release = mixer_release,
      .ioctl   = mixer_ioctl,
      .llseek  = no_llseek,
};

/* ------------------------------------------------------------------ */

static irqreturn_t saa7134_oss_irq(int irq, void *dev_id)
{
      struct saa7134_dmasound *dmasound = dev_id;
      struct saa7134_dev *dev = dmasound->priv_data;
      unsigned long report, status;
      int loop, handled = 0;

      for (loop = 0; loop < 10; loop++) {
            report = saa_readl(SAA7134_IRQ_REPORT);
            status = saa_readl(SAA7134_IRQ_STATUS);

            if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
                  handled = 1;
                  saa_writel(SAA7134_IRQ_REPORT,report);
                  saa7134_irq_oss_done(dev, status);
            } else {
                  goto out;
            }
      }

      if (loop == 10) {
            dprintk("error! looping IRQ!");
      }
out:
      return IRQ_RETVAL(handled);
}

int saa7134_oss_init1(struct saa7134_dev *dev)
{

      if ((request_irq(dev->pci->irq, saa7134_oss_irq,
                   IRQF_SHARED | IRQF_DISABLED, dev->name,
                  (void*) &dev->dmasound)) < 0)
            return -1;

      /* general */
      mutex_init(&dev->dmasound.lock);
      init_waitqueue_head(&dev->dmasound.wq);

      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            saa_writel(0x588 >> 2, 0x00000fff);
            saa_writel(0x58c >> 2, 0x00543210);
            saa_dsp_writel(dev, 0x46c >> 2, 0xbbbbbb);
            break;
      }

      /* dsp */
      dev->dmasound.rate = 32000;
      if (rate)
            dev->dmasound.rate = rate;
      dev->dmasound.rate = (dev->dmasound.rate > 40000) ? 48000 : 32000;

      /* mixer */
      dev->dmasound.line1 = 50;
      dev->dmasound.line2 = 50;
      mixer_level(dev,LINE1,dev->dmasound.line1);
      mixer_level(dev,LINE2,dev->dmasound.line2);
      mixer_recsrc(dev, (dev->dmasound.rate == 32000) ? TV : LINE2);

      return 0;
}

int saa7134_oss_fini(struct saa7134_dev *dev)
{
      /* nothing */
      return 0;
}

void saa7134_irq_oss_done(struct saa7134_dev *dev, unsigned long status)
{
      int next_blk, reg = 0;

      spin_lock(&dev->slock);
      if (UNSET == dev->dmasound.dma_blk) {
            dprintk("irq: recording stopped\n");
            goto done;
      }
      if (0 != (status & 0x0f000000))
            dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
      if (0 == (status & 0x10000000)) {
            /* odd */
            if (0 == (dev->dmasound.dma_blk & 0x01))
                  reg = SAA7134_RS_BA1(6);
      } else {
            /* even */
            if (1 == (dev->dmasound.dma_blk & 0x01))
                  reg = SAA7134_RS_BA2(6);
      }
      if (0 == reg) {
            dprintk("irq: field oops [%s]\n",
                  (status & 0x10000000) ? "even" : "odd");
            goto done;
      }
      if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
            dprintk("irq: overrun [full=%d/%d]\n",dev->dmasound.read_count,
                  dev->dmasound.bufsize);
            dsp_dma_stop(dev);
            goto done;
      }

      /* next block addr */
      next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
      saa_writel(reg,next_blk * dev->dmasound.blksize);
      if (debug > 2)
            dprintk("irq: ok, %s, next_blk=%d, addr=%x\n",
                  (status & 0x10000000) ? "even" : "odd ", next_blk,
                  next_blk * dev->dmasound.blksize);

      /* update status & wake waiting readers */
      dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
      dev->dmasound.read_count += dev->dmasound.blksize;
      wake_up(&dev->dmasound.wq);

 done:
      spin_unlock(&dev->slock);
}

static int saa7134_dsp_create(struct saa7134_dev *dev)
{
      int err;

      err = dev->dmasound.minor_dsp =
            register_sound_dsp(&saa7134_dsp_fops,
                           dsp_nr[dev->nr]);
      if (err < 0) {
            goto fail;
      }
      printk(KERN_INFO "%s: registered device dsp%d\n",
             dev->name,dev->dmasound.minor_dsp >> 4);

      err = dev->dmasound.minor_mixer =
            register_sound_mixer(&saa7134_mixer_fops,
                             mixer_nr[dev->nr]);
      if (err < 0)
            goto fail;
      printk(KERN_INFO "%s: registered device mixer%d\n",
             dev->name,dev->dmasound.minor_mixer >> 4);

      return 0;

fail:
      unregister_sound_dsp(dev->dmasound.minor_dsp);
      return 0;


}

static int oss_device_init(struct saa7134_dev *dev)
{
      dev->dmasound.priv_data = dev;
      saa7134_oss_init1(dev);
      saa7134_dsp_create(dev);
      return 1;
}

static int oss_device_exit(struct saa7134_dev *dev)
{

      unregister_sound_mixer(dev->dmasound.minor_mixer);
      unregister_sound_dsp(dev->dmasound.minor_dsp);

      saa7134_oss_fini(dev);

      if (dev->pci->irq > 0) {
            synchronize_irq(dev->pci->irq);
            free_irq(dev->pci->irq,&dev->dmasound);
      }

      dev->dmasound.priv_data = NULL;
      return 1;
}

static int saa7134_oss_init(void)
{
      struct saa7134_dev *dev = NULL;
      struct list_head *list;

      if (!saa7134_dmasound_init && !saa7134_dmasound_exit) {
            saa7134_dmasound_init = oss_device_init;
            saa7134_dmasound_exit = oss_device_exit;
      } else {
            printk(KERN_WARNING "saa7134 OSS: can't load, DMA sound handler already assigned (probably to ALSA)\n");
            return -EBUSY;
      }

      printk(KERN_INFO "saa7134 OSS driver for DMA sound loaded\n");


      list_for_each(list,&saa7134_devlist) {
            dev = list_entry(list, struct saa7134_dev, devlist);
            if (dev->dmasound.priv_data == NULL) {
                  oss_device_init(dev);
            } else {
                  printk(KERN_ERR "saa7134 OSS: DMA sound is being handled by ALSA, ignoring %s\n",dev->name);
                  return -EBUSY;
            }
      }

      if (dev == NULL)
            printk(KERN_INFO "saa7134 OSS: no saa7134 cards found\n");

      return 0;

}

static void saa7134_oss_exit(void)
{
      struct saa7134_dev *dev;

      list_for_each_entry(dev, &saa7134_devlist, devlist) {
            /* Device isn't registered by OSS, probably ALSA's */
            if (!dev->dmasound.minor_dsp)
                  continue;

            oss_device_exit(dev);
      }

      saa7134_dmasound_init = NULL;
      saa7134_dmasound_exit = NULL;

      printk(KERN_INFO "saa7134 OSS driver for DMA sound unloaded\n");

      return;
}

/* We initialize this late, to make sure the sound system is up and running */
late_initcall(saa7134_oss_init);
module_exit(saa7134_oss_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

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