/*
   * linux/sound/oss/waveartist.c
   *
   * The low level driver for the RWA010 Rockwell Wave Artist
   * codec chip used in the Rebel.com NetWinder.
   *
   * Cleaned up and integrated into 2.1 by Russell King (rmk@arm.linux.org.uk)
   * and Pat Beirne (patb@corel.ca)
   *
   *
   * Copyright (C) by Rebel.com 1998-1999
   *
   * RWA010 specs received under NDA from Rockwell
   *
   * Copyright (C) by Hannu Savolainen 1993-1997
   *
   * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
   * Version 2 (June 1991). See the "COPYING" file distributed with this software
   * for more info.
   *
   * Changes:
   * 11-10-2000	Bartlomiej Zolnierkiewicz <bkz@linux-ide.org>
   *		Added __init to waveartist_init()
   */
  
  /* Debugging */
  #define DEBUG_CMD	1
  #define DEBUG_OUT	2
  #define DEBUG_IN	4
  #define DEBUG_INTR	8
  #define DEBUG_MIXER	16
  #define DEBUG_TRIGGER	32
  
  #define debug_flg (0)
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/slab.h>
  #include <linux/sched.h>
  #include <linux/interrupt.h>
  #include <linux/delay.h>
  #include <linux/spinlock.h>
  #include <linux/bitops.h>
  
  
  #include "sound_config.h"
  #include "waveartist.h"
  
  #ifdef CONFIG_ARM
  #include <mach/hardware.h>
  #include <asm/mach-types.h>
  #endif
  
  #ifndef NO_DMA
  #define NO_DMA	255
  #endif
  
  #define SUPPORTED_MIXER_DEVICES		(SOUND_MASK_SYNTH      |\
  					 SOUND_MASK_PCM        |\
  					 SOUND_MASK_LINE       |\
  					 SOUND_MASK_MIC        |\
  					 SOUND_MASK_LINE1      |\
  					 SOUND_MASK_RECLEV     |\
  					 SOUND_MASK_VOLUME     |\
  					 SOUND_MASK_IMIX)
  
  static unsigned short levels[SOUND_MIXER_NRDEVICES] = {
  	0x5555,		/* Master Volume	 */
  	0x0000,		/* Bass			 */
  	0x0000,		/* Treble		 */
  	0x2323,		/* Synth (FM)		 */
  	0x4b4b,		/* PCM			 */
  	0x6464,		/* PC Speaker		 */
  	0x0000,		/* Ext Line		 */
  	0x0000,		/* Mic			 */
  	0x0000,		/* CD			 */
  	0x6464,		/* Recording monitor	 */
  	0x0000,		/* SB PCM (ALT PCM)	 */
  	0x0000,		/* Recording level	 */
  	0x6464,		/* Input gain		 */
  	0x6464,		/* Output gain		 */
  	0x0000,		/* Line1 (Aux1)		 */
  	0x0000,		/* Line2 (Aux2)		 */
  	0x0000,		/* Line3 (Aux3)		 */
  	0x0000,		/* Digital1		 */
  	0x0000,		/* Digital2		 */
  	0x0000,		/* Digital3		 */
  	0x0000,		/* Phone In		 */
  	0x6464,		/* Phone Out		 */
  	0x0000,		/* Video		 */
  	0x0000,		/* Radio		 */
  	0x0000		/* Monitor		 */
  };
  
  typedef struct {
  	struct address_info  hw;	/* hardware */
  	char		*chip_name;
  
  	int		xfer_count;
  	int		audio_mode;
  	int		open_mode;
  	int		audio_flags;
  	int		record_dev;
  	int		playback_dev;
  	int		dev_no;
  
  	/* Mixer parameters */
  	const struct waveartist_mixer_info *mix;
  
  	unsigned short	*levels;	   /* cache of volume settings   */
  	int		recmask;	   /* currently enabled recording device! */
  
  #ifdef CONFIG_ARCH_NETWINDER
  	signed int	slider_vol;	   /* hardware slider volume     */
  	unsigned int	handset_detect	:1;
  	unsigned int	telephone_detect:1;
  	unsigned int	no_autoselect	:1;/* handset/telephone autoselects a path */
  	unsigned int	spkr_mute_state	:1;/* set by ioctl or autoselect */
  	unsigned int	line_mute_state	:1;/* set by ioctl or autoselect */
  	unsigned int	use_slider	:1;/* use slider setting for o/p vol */
  #endif
  } wavnc_info;
  
  /*
   * This is the implementation specific mixer information.
   */
  struct waveartist_mixer_info {
  	unsigned int	supported_devs;	   /* Supported devices */
  	unsigned int	recording_devs;	   /* Recordable devies */
  	unsigned int	stereo_devs;	   /* Stereo devices	*/
  
  	unsigned int	(*select_input)(wavnc_info *, unsigned int,
  					unsigned char *, unsigned char *);
  	int		(*decode_mixer)(wavnc_info *, int,
  					unsigned char, unsigned char);
  	int		(*get_mixer)(wavnc_info *, int);
  };
  
  typedef struct wavnc_port_info {
  	int		open_mode;
  	int		speed;
  	int		channels;
  	int		audio_format;
  } wavnc_port_info;
  
  static int		nr_waveartist_devs;
  static wavnc_info	adev_info[MAX_AUDIO_DEV];
  static DEFINE_SPINLOCK(waveartist_lock);
  
  #ifndef CONFIG_ARCH_NETWINDER
  #define machine_is_netwinder() 0
  #else
  static struct timer_list vnc_timer;
  static void vnc_configure_mixer(wavnc_info *devc, unsigned int input_mask);
  static int vnc_private_ioctl(int dev, unsigned int cmd, int __user *arg);
  static void vnc_slider_tick(unsigned long data);
  #endif
  
  static inline void
  waveartist_set_ctlr(struct address_info *hw, unsigned char clear, unsigned char set)
  {
  	unsigned int ctlr_port = hw->io_base + CTLR;
  
  	clear = ~clear & inb(ctlr_port);
  
  	outb(clear | set, ctlr_port);
  }
  
  /* Toggle IRQ acknowledge line
   */
  static inline void
  waveartist_iack(wavnc_info *devc)
  {
  	unsigned int ctlr_port = devc->hw.io_base + CTLR;
  	int old_ctlr;
  
  	old_ctlr = inb(ctlr_port) & ~IRQ_ACK;
  
  	outb(old_ctlr | IRQ_ACK, ctlr_port);
  	outb(old_ctlr, ctlr_port);
  }
  
  static inline int
  waveartist_sleep(int timeout_ms)
  {
  	unsigned int timeout = msecs_to_jiffies(timeout_ms*100);
  	return schedule_timeout_interruptible(timeout);
  }
  
  static int
  waveartist_reset(wavnc_info *devc)
  {
  	struct address_info *hw = &devc->hw;
  	unsigned int timeout, res = -1;
  
  	waveartist_set_ctlr(hw, -1, RESET);
  	waveartist_sleep(2);
  	waveartist_set_ctlr(hw, RESET, 0);
  
  	timeout = 500;
  	do {
  		mdelay(2);
  
  		if (inb(hw->io_base + STATR) & CMD_RF) {
  			res = inw(hw->io_base + CMDR);
  			if (res == 0x55aa)
  				break;
  		}
  	} while (--timeout);
  
  	if (timeout == 0) {
  		printk(KERN_WARNING "WaveArtist: reset timeout ");
  		if (res != (unsigned int)-1)
  			printk("(res=%04X)", res);
  		printk("
  ");
  		return 1;
  	}
  	return 0;
  }
  
  /* Helper function to send and receive words
   * from WaveArtist.  It handles all the handshaking
   * and can send or receive multiple words.
   */
  static int
  waveartist_cmd(wavnc_info *devc,
  		int nr_cmd, unsigned int *cmd,
  		int nr_resp, unsigned int *resp)
  {
  	unsigned int io_base = devc->hw.io_base;
  	unsigned int timed_out = 0;
  	unsigned int i;
  
  	if (debug_flg & DEBUG_CMD) {
  		printk("waveartist_cmd: cmd=");
  
  		for (i = 0; i < nr_cmd; i++)
  			printk("%04X ", cmd[i]);
  
  		printk("
  ");
  	}
  
  	if (inb(io_base + STATR) & CMD_RF) {
  		int old_data;
  
  		/* flush the port
  		 */
  
  		old_data = inw(io_base + CMDR);
  
  		if (debug_flg & DEBUG_CMD)
  			printk("flushed %04X...", old_data);
  
  		udelay(10);
  	}
  
  	for (i = 0; !timed_out && i < nr_cmd; i++) {
  		int count;
  
  		for (count = 5000; count; count--)
  			if (inb(io_base + STATR) & CMD_WE)
  				break;
  
  		if (!count)
  			timed_out = 1;
  		else
  			outw(cmd[i], io_base + CMDR);
  	}
  
  	for (i = 0; !timed_out && i < nr_resp; i++) {
  		int count;
  
  		for (count = 5000; count; count--)
  			if (inb(io_base + STATR) & CMD_RF)
  				break;
  
  		if (!count)
  			timed_out = 1;
  		else
  			resp[i] = inw(io_base + CMDR);
  	}
  
  	if (debug_flg & DEBUG_CMD) {
  		if (!timed_out) {
  			printk("waveartist_cmd: resp=");
  
  			for (i = 0; i < nr_resp; i++)
  				printk("%04X ", resp[i]);
  
  			printk("
  ");
  		} else
  			printk("waveartist_cmd: timed out
  ");
  	}
  
  	return timed_out ? 1 : 0;
  }
  
  /*
   * Send one command word
   */
  static inline int
  waveartist_cmd1(wavnc_info *devc, unsigned int cmd)
  {
  	return waveartist_cmd(devc, 1, &cmd, 0, NULL);
  }
  
  /*
   * Send one command, receive one word
   */
  static inline unsigned int
  waveartist_cmd1_r(wavnc_info *devc, unsigned int cmd)
  {
  	unsigned int ret;
  
  	waveartist_cmd(devc, 1, &cmd, 1, &ret);
  
  	return ret;
  }
  
  /*
   * Send a double command, receive one
   * word (and throw it away)
   */
  static inline int
  waveartist_cmd2(wavnc_info *devc, unsigned int cmd, unsigned int arg)
  {
  	unsigned int vals[2];
  
  	vals[0] = cmd;
  	vals[1] = arg;
  
  	return waveartist_cmd(devc, 2, vals, 1, vals);
  }
  
  /*
   * Send a triple command
   */
  static inline int
  waveartist_cmd3(wavnc_info *devc, unsigned int cmd,
  		unsigned int arg1, unsigned int arg2)
  {
  	unsigned int vals[3];
  
  	vals[0] = cmd;
  	vals[1] = arg1;
  	vals[2] = arg2;
  
  	return waveartist_cmd(devc, 3, vals, 0, NULL);
  }
  
  static int
  waveartist_getrev(wavnc_info *devc, char *rev)
  {
  	unsigned int temp[2];
  	unsigned int cmd = WACMD_GETREV;
  
  	waveartist_cmd(devc, 1, &cmd, 2, temp);
  
  	rev[0] = temp[0] >> 8;
  	rev[1] = temp[0] & 255;
  	rev[2] = '\0';
  
  	return temp[0];
  }
  
  static void waveartist_halt_output(int dev);
  static void waveartist_halt_input(int dev);
  static void waveartist_halt(int dev);
  static void waveartist_trigger(int dev, int state);
  
  static int
  waveartist_open(int dev, int mode)
  {
  	wavnc_info	*devc;
  	wavnc_port_info	*portc;
  	unsigned long	flags;
  
  	if (dev < 0 || dev >= num_audiodevs)
  		return -ENXIO;
  
  	devc  = (wavnc_info *) audio_devs[dev]->devc;
  	portc = (wavnc_port_info *) audio_devs[dev]->portc;
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  	if (portc->open_mode || (devc->open_mode & mode)) {
  		spin_unlock_irqrestore(&waveartist_lock, flags);
  		return -EBUSY;
  	}
  
  	devc->audio_mode  = 0;
  	devc->open_mode  |= mode;
  	portc->open_mode  = mode;
  	waveartist_trigger(dev, 0);
  
  	if (mode & OPEN_READ)
  		devc->record_dev = dev;
  	if (mode & OPEN_WRITE)
  		devc->playback_dev = dev;
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  
  	return 0;
  }
  
  static void
  waveartist_close(int dev)
  {
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	wavnc_port_info	*portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	unsigned long	flags;
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	waveartist_halt(dev);
  
  	devc->audio_mode = 0;
  	devc->open_mode &= ~portc->open_mode;
  	portc->open_mode = 0;
  
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  }
  
  static void
  waveartist_output_block(int dev, unsigned long buf, int __count, int intrflag)
  {
  	wavnc_port_info	*portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	unsigned long	flags;
  	unsigned int	count = __count; 
  
  	if (debug_flg & DEBUG_OUT)
  		printk("waveartist: output block, buf=0x%lx, count=0x%x...
  ",
  			buf, count);
  	/*
  	 * 16 bit data
  	 */
  	if (portc->audio_format & (AFMT_S16_LE | AFMT_S16_BE))
  		count >>= 1;
  
  	if (portc->channels > 1)
  		count >>= 1;
  
  	count -= 1;
  
  	if (devc->audio_mode & PCM_ENABLE_OUTPUT &&
  	    audio_devs[dev]->flags & DMA_AUTOMODE &&
  	    intrflag &&
  	    count == devc->xfer_count) {
  		devc->audio_mode |= PCM_ENABLE_OUTPUT;
  		return;	/*
  			 * Auto DMA mode on. No need to react
  			 */
  	}
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	/*
  	 * set sample count
  	 */
  	waveartist_cmd2(devc, WACMD_OUTPUTSIZE, count);
  
  	devc->xfer_count = count;
  	devc->audio_mode |= PCM_ENABLE_OUTPUT;
  
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  }
  
  static void
  waveartist_start_input(int dev, unsigned long buf, int __count, int intrflag)
  {
  	wavnc_port_info *portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	unsigned long	flags;
  	unsigned int	count = __count;
  
  	if (debug_flg & DEBUG_IN)
  		printk("waveartist: start input, buf=0x%lx, count=0x%x...
  ",
  			buf, count);
  
  	if (portc->audio_format & (AFMT_S16_LE | AFMT_S16_BE))	/* 16 bit data */
  		count >>= 1;
  
  	if (portc->channels > 1)
  		count >>= 1;
  
  	count -= 1;
  
  	if (devc->audio_mode & PCM_ENABLE_INPUT &&
  	    audio_devs[dev]->flags & DMA_AUTOMODE &&
  	    intrflag &&
  	    count == devc->xfer_count) {
  		devc->audio_mode |= PCM_ENABLE_INPUT;
  		return;	/*
  			 * Auto DMA mode on. No need to react
  			 */
  	}
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	/*
  	 * set sample count
  	 */
  	waveartist_cmd2(devc, WACMD_INPUTSIZE, count);
  
  	devc->xfer_count = count;
  	devc->audio_mode |= PCM_ENABLE_INPUT;
  
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  }
  
  static int
  waveartist_ioctl(int dev, unsigned int cmd, void __user * arg)
  {
  	return -EINVAL;
  }
  
  static unsigned int
  waveartist_get_speed(wavnc_port_info *portc)
  {
  	unsigned int speed;
  
  	/*
  	 * program the speed, channels, bits
  	 */
  	if (portc->speed == 8000)
  		speed = 0x2E71;
  	else if (portc->speed == 11025)
  		speed = 0x4000;
  	else if (portc->speed == 22050)
  		speed = 0x8000;
  	else if (portc->speed == 44100)
  		speed = 0x0;
  	else {
  		/*
  		 * non-standard - just calculate
  		 */
  		speed = portc->speed << 16;
  
  		speed = (speed / 44100) & 65535;
  	}
  
  	return speed;
  }
  
  static unsigned int
  waveartist_get_bits(wavnc_port_info *portc)
  {
  	unsigned int bits;
  
  	if (portc->audio_format == AFMT_S16_LE)
  		bits = 1;
  	else if (portc->audio_format == AFMT_S8)
  		bits = 0;
  	else
  		bits = 2;	//default AFMT_U8
  
  	return bits;
  }
  
  static int
  waveartist_prepare_for_input(int dev, int bsize, int bcount)
  {
  	unsigned long	flags;
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	wavnc_port_info	*portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	unsigned int	speed, bits;
  
  	if (devc->audio_mode)
  		return 0;
  
  	speed = waveartist_get_speed(portc);
  	bits  = waveartist_get_bits(portc);
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	if (waveartist_cmd2(devc, WACMD_INPUTFORMAT, bits))
  		printk(KERN_WARNING "waveartist: error setting the "
  		       "record format to %d
  ", portc->audio_format);
  
  	if (waveartist_cmd2(devc, WACMD_INPUTCHANNELS, portc->channels))
  		printk(KERN_WARNING "waveartist: error setting record "
  		       "to %d channels
  ", portc->channels);
  
  	/*
  	 * write cmd SetSampleSpeedTimeConstant
  	 */
  	if (waveartist_cmd2(devc, WACMD_INPUTSPEED, speed))
  		printk(KERN_WARNING "waveartist: error setting the record "
  		       "speed to %dHz.
  ", portc->speed);
  
  	if (waveartist_cmd2(devc, WACMD_INPUTDMA, 1))
  		printk(KERN_WARNING "waveartist: error setting the record "
  		       "data path to 0x%X
  ", 1);
  
  	if (waveartist_cmd2(devc, WACMD_INPUTFORMAT, bits))
  		printk(KERN_WARNING "waveartist: error setting the record "
  		       "format to %d
  ", portc->audio_format);
  
  	devc->xfer_count = 0;
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  	waveartist_halt_input(dev);
  
  	if (debug_flg & DEBUG_INTR) {
  		printk("WA CTLR reg: 0x%02X.
  ",
  		       inb(devc->hw.io_base + CTLR));
  		printk("WA STAT reg: 0x%02X.
  ",
  		       inb(devc->hw.io_base + STATR));
  		printk("WA IRQS reg: 0x%02X.
  ",
  		       inb(devc->hw.io_base + IRQSTAT));
  	}
  
  	return 0;
  }
  
  static int
  waveartist_prepare_for_output(int dev, int bsize, int bcount)
  {
  	unsigned long	flags;
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	wavnc_port_info	*portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	unsigned int	speed, bits;
  
  	/*
  	 * program the speed, channels, bits
  	 */
  	speed = waveartist_get_speed(portc);
  	bits  = waveartist_get_bits(portc);
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	if (waveartist_cmd2(devc, WACMD_OUTPUTSPEED, speed) &&
  	    waveartist_cmd2(devc, WACMD_OUTPUTSPEED, speed))
  		printk(KERN_WARNING "waveartist: error setting the playback "
  		       "speed to %dHz.
  ", portc->speed);
  
  	if (waveartist_cmd2(devc, WACMD_OUTPUTCHANNELS, portc->channels))
  		printk(KERN_WARNING "waveartist: error setting the playback "
  		       "to %d channels
  ", portc->channels);
  
  	if (waveartist_cmd2(devc, WACMD_OUTPUTDMA, 0))
  		printk(KERN_WARNING "waveartist: error setting the playback "
  		       "data path to 0x%X
  ", 0);
  
  	if (waveartist_cmd2(devc, WACMD_OUTPUTFORMAT, bits))
  		printk(KERN_WARNING "waveartist: error setting the playback "
  		       "format to %d
  ", portc->audio_format);
  
  	devc->xfer_count = 0;
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  	waveartist_halt_output(dev);
  
  	if (debug_flg & DEBUG_INTR) {
  		printk("WA CTLR reg: 0x%02X.
  ",inb(devc->hw.io_base + CTLR));
  		printk("WA STAT reg: 0x%02X.
  ",inb(devc->hw.io_base + STATR));
  		printk("WA IRQS reg: 0x%02X.
  ",inb(devc->hw.io_base + IRQSTAT));
  	}
  
  	return 0;
  }
  
  static void
  waveartist_halt(int dev)
  {
  	wavnc_port_info	*portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	wavnc_info	*devc;
  
  	if (portc->open_mode & OPEN_WRITE)
  		waveartist_halt_output(dev);
  
  	if (portc->open_mode & OPEN_READ)
  		waveartist_halt_input(dev);
  
  	devc = (wavnc_info *) audio_devs[dev]->devc;
  	devc->audio_mode = 0;
  }
  
  static void
  waveartist_halt_input(int dev)
  {
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	unsigned long	flags;
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	/*
  	 * Stop capture
  	 */
  	waveartist_cmd1(devc, WACMD_INPUTSTOP);
  
  	devc->audio_mode &= ~PCM_ENABLE_INPUT;
  
  	/*
  	 * Clear interrupt by toggling
  	 * the IRQ_ACK bit in CTRL
  	 */
  	if (inb(devc->hw.io_base + STATR) & IRQ_REQ)
  		waveartist_iack(devc);
  
  //	devc->audio_mode &= ~PCM_ENABLE_INPUT;
  
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  }
  
  static void
  waveartist_halt_output(int dev)
  {
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	unsigned long	flags;
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	waveartist_cmd1(devc, WACMD_OUTPUTSTOP);
  
  	devc->audio_mode &= ~PCM_ENABLE_OUTPUT;
  
  	/*
  	 * Clear interrupt by toggling
  	 * the IRQ_ACK bit in CTRL
  	 */
  	if (inb(devc->hw.io_base + STATR) & IRQ_REQ)
  		waveartist_iack(devc);
  
  //	devc->audio_mode &= ~PCM_ENABLE_OUTPUT;
  
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  }
  
  static void
  waveartist_trigger(int dev, int state)
  {
  	wavnc_info	*devc = (wavnc_info *) audio_devs[dev]->devc;
  	wavnc_port_info	*portc = (wavnc_port_info *) audio_devs[dev]->portc;
  	unsigned long	flags;
  
  	if (debug_flg & DEBUG_TRIGGER) {
  		printk("wavnc: audio trigger ");
  		if (state & PCM_ENABLE_INPUT)
  			printk("in ");
  		if (state & PCM_ENABLE_OUTPUT)
  			printk("out");
  		printk("
  ");
  	}
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	state &= devc->audio_mode;
  
  	if (portc->open_mode & OPEN_READ &&
  	    state & PCM_ENABLE_INPUT)
  		/*
  		 * enable ADC Data Transfer to PC
  		 */
  		waveartist_cmd1(devc, WACMD_INPUTSTART);
  
  	if (portc->open_mode & OPEN_WRITE &&
  	    state & PCM_ENABLE_OUTPUT)
  		/*
  		 * enable DAC data transfer from PC
  		 */
  		waveartist_cmd1(devc, WACMD_OUTPUTSTART);
  
  	spin_unlock_irqrestore(&waveartist_lock, flags);
  }
  
  static int
  waveartist_set_speed(int dev, int arg)
  {
  	wavnc_port_info *portc = (wavnc_port_info *) audio_devs[dev]->portc;
  
  	if (arg <= 0)
  		return portc->speed;
  
  	if (arg < 5000)
  		arg = 5000;
  	if (arg > 44100)
  		arg = 44100;
  
  	portc->speed = arg;
  	return portc->speed;
  
  }
  
  static short
  waveartist_set_channels(int dev, short arg)
  {
  	wavnc_port_info *portc = (wavnc_port_info *) audio_devs[dev]->portc;
  
  	if (arg != 1 && arg != 2)
  		return portc->channels;
  
  	portc->channels = arg;
  	return arg;
  }
  
  static unsigned int
  waveartist_set_bits(int dev, unsigned int arg)
  {
  	wavnc_port_info *portc = (wavnc_port_info *) audio_devs[dev]->portc;
  
  	if (arg == 0)
  		return portc->audio_format;
  
  	if ((arg != AFMT_U8) && (arg != AFMT_S16_LE) && (arg != AFMT_S8))
  		arg = AFMT_U8;
  
  	portc->audio_format = arg;
  
  	return arg;
  }
  
  static struct audio_driver waveartist_audio_driver = {
  	.owner			= THIS_MODULE,
  	.open			= waveartist_open,
  	.close			= waveartist_close,
  	.output_block		= waveartist_output_block,
  	.start_input		= waveartist_start_input,
  	.ioctl			= waveartist_ioctl,
  	.prepare_for_input	= waveartist_prepare_for_input,
  	.prepare_for_output	= waveartist_prepare_for_output,
  	.halt_io		= waveartist_halt,
  	.halt_input		= waveartist_halt_input,
  	.halt_output		= waveartist_halt_output,
  	.trigger		= waveartist_trigger,
  	.set_speed		= waveartist_set_speed,
  	.set_bits		= waveartist_set_bits,
  	.set_channels		= waveartist_set_channels
  };
  
  
  static irqreturn_t
  waveartist_intr(int irq, void *dev_id)
  {
  	wavnc_info *devc = dev_id;
  	int	   irqstatus, status;
  
  	spin_lock(&waveartist_lock);
  	irqstatus = inb(devc->hw.io_base + IRQSTAT);
  	status    = inb(devc->hw.io_base + STATR);
  
  	if (debug_flg & DEBUG_INTR)
  		printk("waveartist_intr: stat=%02x, irqstat=%02x
  ",
  		       status, irqstatus);
  
  	if (status & IRQ_REQ)	/* Clear interrupt */
  		waveartist_iack(devc);
  	else
  		printk(KERN_WARNING "waveartist: unexpected interrupt
  ");
  
  	if (irqstatus & 0x01) {
  		int temp = 1;
  
  		/* PCM buffer done
  		 */
  		if ((status & DMA0) && (devc->audio_mode & PCM_ENABLE_OUTPUT)) {
  			DMAbuf_outputintr(devc->playback_dev, 1);
  			temp = 0;
  		}
  		if ((status & DMA1) && (devc->audio_mode & PCM_ENABLE_INPUT)) {
  			DMAbuf_inputintr(devc->record_dev);
  			temp = 0;
  		}
  		if (temp)	//default:
  			printk(KERN_WARNING "waveartist: Unknown interrupt
  ");
  	}
  	if (irqstatus & 0x2)
  		// We do not use SB mode natively...
  		printk(KERN_WARNING "waveartist: Unexpected SB interrupt...
  ");
  	spin_unlock(&waveartist_lock);
  	return IRQ_HANDLED;
  }
  
  /* -------------------------------------------------------------------------
   * Mixer stuff
   */
  struct mix_ent {
  	unsigned char	reg_l;
  	unsigned char	reg_r;
  	unsigned char	shift;
  	unsigned char	max;
  };
  
  static const struct mix_ent mix_devs[SOUND_MIXER_NRDEVICES] = {
  	{ 2, 6, 1,  7 }, /* SOUND_MIXER_VOLUME   */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_BASS     */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_TREBLE   */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_SYNTH    */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_PCM      */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_SPEAKER  */
  	{ 0, 4, 6, 31 }, /* SOUND_MIXER_LINE     */
  	{ 2, 6, 4,  3 }, /* SOUND_MIXER_MIC      */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_CD       */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_IMIX     */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_ALTPCM   */
  #if 0
  	{ 3, 7, 0, 10 }, /* SOUND_MIXER_RECLEV   */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_IGAIN    */
  #else
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_RECLEV   */
  	{ 3, 7, 0,  7 }, /* SOUND_MIXER_IGAIN    */
  #endif
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_OGAIN    */
  	{ 0, 4, 1, 31 }, /* SOUND_MIXER_LINE1    */
  	{ 1, 5, 6, 31 }, /* SOUND_MIXER_LINE2    */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_LINE3    */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_DIGITAL1 */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_DIGITAL2 */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_DIGITAL3 */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_PHONEIN  */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_PHONEOUT */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_VIDEO    */
  	{ 0, 0, 0,  0 }, /* SOUND_MIXER_RADIO    */
  	{ 0, 0, 0,  0 }  /* SOUND_MIXER_MONITOR  */
  };
  
  static void
  waveartist_mixer_update(wavnc_info *devc, int whichDev)
  {
  	unsigned int lev_left, lev_right;
  
  	lev_left  = devc->levels[whichDev] & 0xff;
  	lev_right = devc->levels[whichDev] >> 8;
  
  	if (lev_left > 100)
  		lev_left = 100;
  	if (lev_right > 100)
  		lev_right = 100;
  
  #define SCALE(lev,max)	((lev) * (max) / 100)
  
  	if (machine_is_netwinder() && whichDev == SOUND_MIXER_PHONEOUT)
  		whichDev = SOUND_MIXER_VOLUME;
  
  	if (mix_devs[whichDev].reg_l || mix_devs[whichDev].reg_r) {
  		const struct mix_ent *mix = mix_devs + whichDev;
  		unsigned int mask, left, right;
  
  		mask = mix->max << mix->shift;
  		lev_left  = SCALE(lev_left,  mix->max) << mix->shift;
  		lev_right = SCALE(lev_right, mix->max) << mix->shift;
  
  		/* read left setting */
  		left  = waveartist_cmd1_r(devc, WACMD_GET_LEVEL |
  					       mix->reg_l << 8);
  
  		/* read right setting */
  		right = waveartist_cmd1_r(devc, WACMD_GET_LEVEL |
  						mix->reg_r << 8);
  
  		left  = (left  & ~mask) | (lev_left  & mask);
  		right = (right & ~mask) | (lev_right & mask);
  
  		/* write left,right back */
  		waveartist_cmd3(devc, WACMD_SET_MIXER, left, right);
  	} else {
  		switch(whichDev) {
  		case SOUND_MIXER_PCM:
  			waveartist_cmd3(devc, WACMD_SET_LEVEL,
  					SCALE(lev_left,  32767),
  					SCALE(lev_right, 32767));
  			break;
  
  		case SOUND_MIXER_SYNTH:
  			waveartist_cmd3(devc, 0x0100 | WACMD_SET_LEVEL,
  					SCALE(lev_left,  32767),
  					SCALE(lev_right, 32767));
  			break;
  		}
  	}
  }
  
  /*
   * Set the ADC MUX to the specified values.  We do NOT do any
   * checking of the values passed, since we assume that the
   * relevant *_select_input function has done that for us.
   */
  static void
  waveartist_set_adc_mux(wavnc_info *devc, char left_dev, char right_dev)
  {
  	unsigned int reg_08, reg_09;
  
  	reg_08 = waveartist_cmd1_r(devc, WACMD_GET_LEVEL | 0x0800);
  	reg_09 = waveartist_cmd1_r(devc, WACMD_GET_LEVEL | 0x0900);
  
  	reg_08 = (reg_08 & ~0x3f) | right_dev << 3 | left_dev;
  
  	waveartist_cmd3(devc, WACMD_SET_MIXER, reg_08, reg_09);
  }
  
  /*
   * Decode a recording mask into a mixer selection as follows:
   *
   *     OSS Source	WA Source	Actual source
   *  SOUND_MASK_IMIX	Mixer		Mixer output (same as AD1848)
   *  SOUND_MASK_LINE	Line		Line in
   *  SOUND_MASK_LINE1	Aux 1		Aux 1 in
   *  SOUND_MASK_LINE2	Aux 2		Aux 2 in
   *  SOUND_MASK_MIC	Mic		Microphone
   */
  static unsigned int
  waveartist_select_input(wavnc_info *devc, unsigned int recmask,
  			unsigned char *dev_l, unsigned char *dev_r)
  {
  	unsigned int recdev = ADC_MUX_NONE;
  
  	if (recmask & SOUND_MASK_IMIX) {
  		recmask = SOUND_MASK_IMIX;
  		recdev = ADC_MUX_MIXER;
  	} else if (recmask & SOUND_MASK_LINE2) {
  		recmask = SOUND_MASK_LINE2;
  		recdev = ADC_MUX_AUX2;
  	} else if (recmask & SOUND_MASK_LINE1) {
  		recmask = SOUND_MASK_LINE1;
  		recdev = ADC_MUX_AUX1;
  	} else if (recmask & SOUND_MASK_LINE) {
  		recmask = SOUND_MASK_LINE;
  		recdev = ADC_MUX_LINE;
  	} else if (recmask & SOUND_MASK_MIC) {
  		recmask = SOUND_MASK_MIC;
  		recdev = ADC_MUX_MIC;
  	}
  
  	*dev_l = *dev_r = recdev;
  
  	return recmask;
  }
  
  static int
  waveartist_decode_mixer(wavnc_info *devc, int dev, unsigned char lev_l,
  			unsigned char lev_r)
  {
  	switch (dev) {
  	case SOUND_MIXER_VOLUME:
  	case SOUND_MIXER_SYNTH:
  	case SOUND_MIXER_PCM:
  	case SOUND_MIXER_LINE:
  	case SOUND_MIXER_MIC:
  	case SOUND_MIXER_IGAIN:
  	case SOUND_MIXER_LINE1:
  	case SOUND_MIXER_LINE2:
  		devc->levels[dev] = lev_l | lev_r << 8;
  		break;
  
  	case SOUND_MIXER_IMIX:
  		break;
  
  	default:
  		dev = -EINVAL;
  		break;
  	}
  
  	return dev;
  }
  
  static int waveartist_get_mixer(wavnc_info *devc, int dev)
  {
  	return devc->levels[dev];
  }
  
  static const struct waveartist_mixer_info waveartist_mixer = {
  	.supported_devs	= SUPPORTED_MIXER_DEVICES | SOUND_MASK_IGAIN,
  	.recording_devs	= SOUND_MASK_LINE  | SOUND_MASK_MIC   |
  			SOUND_MASK_LINE1 | SOUND_MASK_LINE2 |
  			SOUND_MASK_IMIX,
  	.stereo_devs	= (SUPPORTED_MIXER_DEVICES | SOUND_MASK_IGAIN) & ~
  			(SOUND_MASK_SPEAKER | SOUND_MASK_IMIX),
  	.select_input	= waveartist_select_input,
  	.decode_mixer	= waveartist_decode_mixer,
  	.get_mixer	= waveartist_get_mixer,
  };
  
  static void
  waveartist_set_recmask(wavnc_info *devc, unsigned int recmask)
  {
  	unsigned char dev_l, dev_r;
  
  	recmask &= devc->mix->recording_devs;
  
  	/*
  	 * If more than one recording device selected,
  	 * disable the device that is currently in use.
  	 */
  	if (hweight32(recmask) > 1)
  		recmask &= ~devc->recmask;
  
  	/*
  	 * Translate the recording device mask into
  	 * the ADC multiplexer settings.
  	 */
  	devc->recmask = devc->mix->select_input(devc, recmask,
  						&dev_l, &dev_r);
  
  	waveartist_set_adc_mux(devc, dev_l, dev_r);
  }
  
  static int
  waveartist_set_mixer(wavnc_info *devc, int dev, unsigned int level)
  {
  	unsigned int lev_left  = level & 0x00ff;
  	unsigned int lev_right = (level & 0xff00) >> 8;
  
  	if (lev_left > 100)
  		lev_left = 100;
  	if (lev_right > 100)
  		lev_right = 100;
  
  	/*
  	 * Mono devices have their right volume forced to their
  	 * left volume.  (from ALSA driver OSS emulation).
  	 */
  	if (!(devc->mix->stereo_devs & (1 << dev)))
  		lev_right = lev_left;
  
  	dev = devc->mix->decode_mixer(devc, dev, lev_left, lev_right);
  
  	if (dev >= 0)
  		waveartist_mixer_update(devc, dev);
  
  	return dev < 0 ? dev : 0;
  }
  
  static int
  waveartist_mixer_ioctl(int dev, unsigned int cmd, void __user * arg)
  {
  	wavnc_info *devc = (wavnc_info *)audio_devs[dev]->devc;
  	int ret = 0, val, nr;
  
  	/*
  	 * All SOUND_MIXER_* ioctls use type 'M'
  	 */
  	if (((cmd >> 8) & 255) != 'M')
  		return -ENOIOCTLCMD;
  
  #ifdef CONFIG_ARCH_NETWINDER
  	if (machine_is_netwinder()) {
  		ret = vnc_private_ioctl(dev, cmd, arg);
  		if (ret != -ENOIOCTLCMD)
  			return ret;
  		else
  			ret = 0;
  	}
  #endif
  
  	nr = cmd & 0xff;
  
  	if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
  		if (get_user(val, (int __user *)arg))
  			return -EFAULT;
  
  		switch (nr) {
  		case SOUND_MIXER_RECSRC:
  			waveartist_set_recmask(devc, val);
  			break;
  
  		default:
  			ret = -EINVAL;
  			if (nr < SOUND_MIXER_NRDEVICES &&
  			    devc->mix->supported_devs & (1 << nr))
  				ret = waveartist_set_mixer(devc, nr, val);
  		}
  	}
  
  	if (ret == 0 && _SIOC_DIR(cmd) & _SIOC_READ) {
  		ret = -EINVAL;
  
  		switch (nr) {
  		case SOUND_MIXER_RECSRC:
  			ret = devc->recmask;
  			break;
  
  		case SOUND_MIXER_DEVMASK:
  			ret = devc->mix->supported_devs;
  			break;
  
  		case SOUND_MIXER_STEREODEVS:
  			ret = devc->mix->stereo_devs;
  			break;
  
  		case SOUND_MIXER_RECMASK:
  			ret = devc->mix->recording_devs;
  			break;
  
  		case SOUND_MIXER_CAPS:
  			ret = SOUND_CAP_EXCL_INPUT;
  			break;
  
  		default:
  			if (nr < SOUND_MIXER_NRDEVICES)
  				ret = devc->mix->get_mixer(devc, nr);
  			break;
  		}
  
  		if (ret >= 0)
  			ret = put_user(ret, (int __user *)arg) ? -EFAULT : 0;
  	}
  
  	return ret;
  }
  
  static struct mixer_operations waveartist_mixer_operations =
  {
  	.owner	= THIS_MODULE,
  	.id	= "WaveArtist",
  	.name	= "WaveArtist",
  	.ioctl	= waveartist_mixer_ioctl
  };
  
  static void
  waveartist_mixer_reset(wavnc_info *devc)
  {
  	int i;
  
  	if (debug_flg & DEBUG_MIXER)
  		printk("%s: mixer_reset
  ", devc->hw.name);
  
  	/*
  	 * reset mixer cmd
  	 */
  	waveartist_cmd1(devc, WACMD_RST_MIXER);
  
  	/*
  	 * set input for ADC to come from 'quiet'
  	 * turn on default modes
  	 */
  	waveartist_cmd3(devc, WACMD_SET_MIXER, 0x9800, 0xa836);
  
  	/*
  	 * set mixer input select to none, RX filter gains 0 dB
  	 */
  	waveartist_cmd3(devc, WACMD_SET_MIXER, 0x4c00, 0x8c00);
  
  	/*
  	 * set bit 0 reg 2 to 1 - unmute MonoOut
  	 */
  	waveartist_cmd3(devc, WACMD_SET_MIXER, 0x2801, 0x6800);
  
  	/* set default input device = internal mic
  	 * current recording device = none
  	 */
  	waveartist_set_recmask(devc, 0);
  
  	for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  		waveartist_mixer_update(devc, i);
  }
  
  static int __init waveartist_init(wavnc_info *devc)
  {
  	wavnc_port_info *portc;
  	char rev[3], dev_name[64];
  	int my_dev;
  
  	if (waveartist_reset(devc))
  		return -ENODEV;
  
  	sprintf(dev_name, "%s (%s", devc->hw.name, devc->chip_name);
  
  	if (waveartist_getrev(devc, rev)) {
  		strcat(dev_name, " rev. ");
  		strcat(dev_name, rev);
  	}
  	strcat(dev_name, ")");
  
  	conf_printf2(dev_name, devc->hw.io_base, devc->hw.irq,
  		     devc->hw.dma, devc->hw.dma2);
  
  	portc = kzalloc(sizeof(wavnc_port_info), GFP_KERNEL);
  	if (portc == NULL)
  		goto nomem;
  
  	my_dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION, dev_name,
  			&waveartist_audio_driver, sizeof(struct audio_driver),
  			devc->audio_flags, AFMT_U8 | AFMT_S16_LE | AFMT_S8,
  			devc, devc->hw.dma, devc->hw.dma2);
  
  	if (my_dev < 0)
  		goto free;
  
  	audio_devs[my_dev]->portc = portc;
  
  	waveartist_mixer_reset(devc);
  
  	/*
  	 * clear any pending interrupt
  	 */
  	waveartist_iack(devc);
  
  	if (request_irq(devc->hw.irq, waveartist_intr, 0, devc->hw.name, devc) < 0) {
  		printk(KERN_ERR "%s: IRQ %d in use
  ",
  			devc->hw.name, devc->hw.irq);
  		goto uninstall;
  	}
  
  	if (sound_alloc_dma(devc->hw.dma, devc->hw.name)) {
  		printk(KERN_ERR "%s: Can't allocate DMA%d
  ",
  			devc->hw.name, devc->hw.dma);
  		goto uninstall_irq;
  	}
  
  	if (devc->hw.dma != devc->hw.dma2 && devc->hw.dma2 != NO_DMA)
  		if (sound_alloc_dma(devc->hw.dma2, devc->hw.name)) {
  			printk(KERN_ERR "%s: can't allocate DMA%d
  ",
  				devc->hw.name, devc->hw.dma2);
  			goto uninstall_dma;
  		}
  
  	waveartist_set_ctlr(&devc->hw, 0, DMA1_IE | DMA0_IE);
  
  	audio_devs[my_dev]->mixer_dev =
  		sound_install_mixer(MIXER_DRIVER_VERSION,
  				dev_name,
  				&waveartist_mixer_operations,
  				sizeof(struct mixer_operations),
  				devc);
  
  	return my_dev;
  
  uninstall_dma:
  	sound_free_dma(devc->hw.dma);
  
  uninstall_irq:
  	free_irq(devc->hw.irq, devc);
  
  uninstall:
  	sound_unload_audiodev(my_dev);
  
  free:
  	kfree(portc);
  
  nomem:
  	return -1;
  }
  
  static int __init probe_waveartist(struct address_info *hw_config)
  {
  	wavnc_info *devc = &adev_info[nr_waveartist_devs];
  
  	if (nr_waveartist_devs >= MAX_AUDIO_DEV) {
  		printk(KERN_WARNING "waveartist: too many audio devices
  ");
  		return 0;
  	}
  
  	if (!request_region(hw_config->io_base, 15, hw_config->name))  {
  		printk(KERN_WARNING "WaveArtist: I/O port conflict
  ");
  		return 0;
  	}
  
  	if (hw_config->irq > 15 || hw_config->irq < 0) {
  		release_region(hw_config->io_base, 15);
  		printk(KERN_WARNING "WaveArtist: Bad IRQ %d
  ",
  		       hw_config->irq);
  		return 0;
  	}
  
  	if (hw_config->dma != 3) {
  		release_region(hw_config->io_base, 15);
  		printk(KERN_WARNING "WaveArtist: Bad DMA %d
  ",
  		       hw_config->dma);
  		return 0;
  	}
  
  	hw_config->name = "WaveArtist";
  	devc->hw = *hw_config;
  	devc->open_mode = 0;
  	devc->chip_name = "RWA-010";
  
  	return 1;
  }
  
  static void __init
  attach_waveartist(struct address_info *hw, const struct waveartist_mixer_info *mix)
  {
  	wavnc_info *devc = &adev_info[nr_waveartist_devs];
  
  	/*
  	 * NOTE! If irq < 0, there is another driver which has allocated the
  	 *   IRQ so that this driver doesn't need to allocate/deallocate it.
  	 *   The actually used IRQ is ABS(irq).
  	 */
  	devc->hw = *hw;
  	devc->hw.irq = (hw->irq > 0) ? hw->irq : 0;
  	devc->open_mode = 0;
  	devc->playback_dev = 0;
  	devc->record_dev = 0;
  	devc->audio_flags = DMA_AUTOMODE;
  	devc->levels = levels;
  
  	if (hw->dma != hw->dma2 && hw->dma2 != NO_DMA)
  		devc->audio_flags |= DMA_DUPLEX;
  
  	devc->mix = mix;
  	devc->dev_no = waveartist_init(devc);
  
  	if (devc->dev_no < 0)
  		release_region(hw->io_base, 15);
  	else {
  #ifdef CONFIG_ARCH_NETWINDER
  		if (machine_is_netwinder()) {
  			init_timer(&vnc_timer);
  			vnc_timer.function = vnc_slider_tick;
  			vnc_timer.expires  = jiffies;
  			vnc_timer.data     = nr_waveartist_devs;
  			add_timer(&vnc_timer);
  
  			vnc_configure_mixer(devc, 0);
  
  			devc->no_autoselect = 1;
  		}
  #endif
  		nr_waveartist_devs += 1;
  	}
  }
  
  static void __exit unload_waveartist(struct address_info *hw)
  {
  	wavnc_info *devc = NULL;
  	int i;
  
  	for (i = 0; i < nr_waveartist_devs; i++)
  		if (hw->io_base == adev_info[i].hw.io_base) {
  			devc = adev_info + i;
  			break;
  		}
  
  	if (devc != NULL) {
  		int mixer;
  
  #ifdef CONFIG_ARCH_NETWINDER
  		if (machine_is_netwinder())
  			del_timer(&vnc_timer);
  #endif
  
  		release_region(devc->hw.io_base, 15);
  
  		waveartist_set_ctlr(&devc->hw, DMA1_IE|DMA0_IE, 0);
  
  		if (devc->hw.irq >= 0)
  			free_irq(devc->hw.irq, devc);
  
  		sound_free_dma(devc->hw.dma);
  
  		if (devc->hw.dma != devc->hw.dma2 &&
  		    devc->hw.dma2 != NO_DMA)
  			sound_free_dma(devc->hw.dma2);
  
  		mixer = audio_devs[devc->dev_no]->mixer_dev;
  
  		if (mixer >= 0)
  			sound_unload_mixerdev(mixer);
  
  		if (devc->dev_no >= 0)
  			sound_unload_audiodev(devc->dev_no);
  
  		nr_waveartist_devs -= 1;
  
  		for (; i < nr_waveartist_devs; i++)
  			adev_info[i] = adev_info[i + 1];
  	} else
  		printk(KERN_WARNING "waveartist: can't find device "
  		       "to unload
  ");
  }
  
  #ifdef CONFIG_ARCH_NETWINDER
  
  /*
   * Rebel.com Netwinder specifics...
   */
  
  #include <asm/hardware/dec21285.h>
   
  #define	VNC_TIMER_PERIOD (HZ/4)	//check slider 4 times/sec
  
  #define	MIXER_PRIVATE3_RESET	0x53570000
  #define	MIXER_PRIVATE3_READ	0x53570001
  #define	MIXER_PRIVATE3_WRITE	0x53570002
  
  #define	VNC_MUTE_INTERNAL_SPKR	0x01	//the sw mute on/off control bit
  #define	VNC_MUTE_LINE_OUT	0x10
  #define VNC_PHONE_DETECT	0x20
  #define VNC_HANDSET_DETECT	0x40
  #define VNC_DISABLE_AUTOSWITCH	0x80
  
  static inline void
  vnc_mute_spkr(wavnc_info *devc)
  {
  	unsigned long flags;
  
  	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
  	nw_cpld_modify(CPLD_UNMUTE, devc->spkr_mute_state ? 0 : CPLD_UNMUTE);
  	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
  }
  
  static void
  vnc_mute_lout(wavnc_info *devc)
  {
  	unsigned int left, right;
  
  	left  = waveartist_cmd1_r(devc, WACMD_GET_LEVEL);
  	right = waveartist_cmd1_r(devc, WACMD_GET_LEVEL | 0x400);
  
  	if (devc->line_mute_state) {
  		left &= ~1;
  		right &= ~1;
  	} else {
  		left |= 1;
  		right |= 1;
  	}
  	waveartist_cmd3(devc, WACMD_SET_MIXER, left, right);
  		
  }
  
  static int
  vnc_volume_slider(wavnc_info *devc)
  {
  	static signed int old_slider_volume;
  	unsigned long flags;
  	signed int volume = 255;
  
  	*CSR_TIMER1_LOAD = 0x00ffffff;
  
  	spin_lock_irqsave(&waveartist_lock, flags);
  
  	outb(0xFF, 0x201);
  	*CSR_TIMER1_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV1;
  
  	while (volume && (inb(0x201) & 0x01))
  		volume--;
  
  	*CSR_TIMER1_CNTL = 0;
  
  	spin_unlock_irqrestore(&waveartist_lock,flags);
  	
  	volume = 0x00ffffff - *CSR_TIMER1_VALUE;
  
  
  #ifndef REVERSE
  	volume = 150 - (volume >> 5);
  #else
  	volume = (volume >> 6) - 25;
  #endif
  
  	if (volume < 0)
  		volume = 0;
  
  	if (volume > 100)
  		volume = 100;
  
  	/*
  	 * slider quite often reads +-8, so debounce this random noise
  	 */
  	if (abs(volume - old_slider_volume) > 7) {
  		old_slider_volume = volume;
  
  		if (debug_flg & DEBUG_MIXER)
  			printk(KERN_DEBUG "Slider volume: %d.
  ", volume);
  	}
  
  	return old_slider_volume;
  }
  
  /*
   * Decode a recording mask into a mixer selection on the NetWinder
   * as follows:
   *
   *     OSS Source	WA Source	Actual source
   *  SOUND_MASK_IMIX	Mixer		Mixer output (same as AD1848)
   *  SOUND_MASK_LINE	Line		Line in
   *  SOUND_MASK_LINE1	Left Mic	Handset
   *  SOUND_MASK_PHONEIN	Left Aux	Telephone microphone
   *  SOUND_MASK_MIC	Right Mic	Builtin microphone
   */
  static unsigned int
  netwinder_select_input(wavnc_info *devc, unsigned int recmask,
  		       unsigned char *dev_l, unsigned char *dev_r)
  {
  	unsigned int recdev_l = ADC_MUX_NONE, recdev_r = ADC_MUX_NONE;
  
  	if (recmask & SOUND_MASK_IMIX) {
  		recmask = SOUND_MASK_IMIX;
  		recdev_l = ADC_MUX_MIXER;
  		recdev_r = ADC_MUX_MIXER;
  	} else if (recmask & SOUND_MASK_LINE) {
  		recmask = SOUND_MASK_LINE;
  		recdev_l = ADC_MUX_LINE;
  		recdev_r = ADC_MUX_LINE;
  	} else if (recmask & SOUND_MASK_LINE1) {
  		recmask = SOUND_MASK_LINE1;
  		waveartist_cmd1(devc, WACMD_SET_MONO); /* left */
  		recdev_l = ADC_MUX_MIC;
  		recdev_r = ADC_MUX_NONE;
  	} else if (recmask & SOUND_MASK_PHONEIN) {
  		recmask = SOUND_MASK_PHONEIN;
  		waveartist_cmd1(devc, WACMD_SET_MONO); /* left */
  		recdev_l = ADC_MUX_AUX1;
  		recdev_r = ADC_MUX_NONE;
  	} else if (recmask & SOUND_MASK_MIC) {
  		recmask = SOUND_MASK_MIC;
  		waveartist_cmd1(devc, WACMD_SET_MONO | 0x100);	/* right */
  		recdev_l = ADC_MUX_NONE;
  		recdev_r = ADC_MUX_MIC;
  	}
  
  	*dev_l = recdev_l;
  	*dev_r = recdev_r;
  
  	return recmask;
  }
  
  static int
  netwinder_decode_mixer(wavnc_info *devc, int dev, unsigned char lev_l,
  		       unsigned char lev_r)
  {
  	switch (dev) {
  	case SOUND_MIXER_VOLUME:
  	case SOUND_MIXER_SYNTH:
  	case SOUND_MIXER_PCM:
  	case SOUND_MIXER_LINE:
  	case SOUND_MIXER_IGAIN:
  		devc->levels[dev] = lev_l | lev_r << 8;
  		break;
  
  	case SOUND_MIXER_MIC:		/* right mic only */
  		devc->levels[SOUND_MIXER_MIC] &= 0xff;
  		devc->levels[SOUND_MIXER_MIC] |= lev_l << 8;
  		break;
  
  	case SOUND_MIXER_LINE1:		/* left mic only  */
  		devc->levels[SOUND_MIXER_MIC] &= 0xff00;
  		devc->levels[SOUND_MIXER_MIC] |= lev_l;
  		dev = SOUND_MIXER_MIC;
  		break;
  
  	case SOUND_MIXER_PHONEIN:	/* left aux only  */
  		devc->levels[SOUND_MIXER_LINE1] = lev_l;
  		dev = SOUND_MIXER_LINE1;
  		break;
  
  	case SOUND_MIXER_IMIX:
  	case SOUND_MIXER_PHONEOUT:
  		break;
  
  	default:
  		dev = -EINVAL;
  		break;
  	}
  	return dev;
  }
  
  static int netwinder_get_mixer(wavnc_info *devc, int dev)
  {
  	int levels;
  
  	switch (dev) {
  	case SOUND_MIXER_VOLUME:
  	case SOUND_MIXER_SYNTH:
  	case SOUND_MIXER_PCM:
  	case SOUND_MIXER_LINE:
  	case SOUND_MIXER_IGAIN:
  		levels = devc->levels[dev];
  		break;
  
  	case SOUND_MIXER_MIC:		/* builtin mic: right mic only */
  		levels = devc->levels[SOUND_MIXER_MIC] >> 8;
  		levels |= levels << 8;
  		break;
  
  	case SOUND_MIXER_LINE1:		/* handset mic: left mic only */
  		levels = devc->levels[SOUND_MIXER_MIC] & 0xff;
  		levels |= levels << 8;
  		break;
  
  	case SOUND_MIXER_PHONEIN:	/* phone mic: left aux1 only */
  		levels = devc->levels[SOUND_MIXER_LINE1] & 0xff;
  		levels |= levels << 8;
  		break;
  
  	default:
  		levels = 0;
  	}
  
  	return levels;
  }
  
  /*
   * Waveartist specific mixer information.
   */
  static const struct waveartist_mixer_info netwinder_mixer = {
  	.supported_devs	= SOUND_MASK_VOLUME  | SOUND_MASK_SYNTH   |
  			SOUND_MASK_PCM     | SOUND_MASK_SPEAKER |
  			SOUND_MASK_LINE    | SOUND_MASK_MIC     |
  			SOUND_MASK_IMIX    | SOUND_MASK_LINE1   |
  			SOUND_MASK_PHONEIN | SOUND_MASK_PHONEOUT|
  			SOUND_MASK_IGAIN,
  
  	.recording_devs	= SOUND_MASK_LINE    | SOUND_MASK_MIC     |
  			SOUND_MASK_IMIX    | SOUND_MASK_LINE1   |
  			SOUND_MASK_PHONEIN,
  
  	.stereo_devs	= SOUND_MASK_VOLUME  | SOUND_MASK_SYNTH   |
  			SOUND_MASK_PCM     | SOUND_MASK_LINE    |
  			SOUND_MASK_IMIX    | SOUND_MASK_IGAIN,
  
  	.select_input	= netwinder_select_input,
  	.decode_mixer	= netwinder_decode_mixer,
  	.get_mixer	= netwinder_get_mixer,
  };
  
  static void
  vnc_configure_mixer(wavnc_info *devc, unsigned int recmask)
  {
  	if (!devc->no_autoselect) {
  		if (devc->handset_detect) {
  			recmask = SOUND_MASK_LINE1;
  			devc->spkr_mute_state = devc->line_mute_state = 1;
  		} else if (devc->telephone_detect) {
  			recmask = SOUND_MASK_PHONEIN;
  			devc->spkr_mute_state = devc->line_mute_state = 1;
  		} else {
  			/* unless someone has asked for LINE-IN,
  			 * we default to MIC
  			 */
  			if ((devc->recmask & SOUND_MASK_LINE) == 0)
  				devc->recmask = SOUND_MASK_MIC;
  			devc->spkr_mute_state = devc->line_mute_state = 0;
  		}
  		vnc_mute_spkr(devc);
  		vnc_mute_lout(devc);
  
  		if (recmask != devc->recmask)
  			waveartist_set_recmask(devc, recmask);
  	}
  }
  
  static int
  vnc_slider(wavnc_info *devc)
  {
  	signed int slider_volume;
  	unsigned int temp, old_hs, old_td;
  
  	/*
  	 * read the "buttons" state.
  	 *  Bit 4 = 0 means handset present
  	 *  Bit 5 = 1 means phone offhook
  	 */
  	temp = inb(0x201);
  
  	old_hs = devc->handset_detect;
  	old_td = devc->telephone_detect;
  
  	devc->handset_detect = !(temp & 0x10);
  	devc->telephone_detect = !!(temp & 0x20);
  
  	if (!devc->no_autoselect &&
  	    (old_hs != devc->handset_detect ||
  	     old_td != devc->telephone_detect))
  		vnc_configure_mixer(devc, devc->recmask);
  
  	slider_volume = vnc_volume_slider(devc);
  
  	/*
  	 * If we're using software controlled volume, and
  	 * the slider moves by more than 20%, then we
  	 * switch back to slider controlled volume.
  	 */
  	if (abs(devc->slider_vol - slider_volume) > 20)
  		devc->use_slider = 1;
  
  	/*
  	 * use only left channel
  	 */
  	temp = levels[SOUND_MIXER_VOLUME] & 0xFF;
  
  	if (slider_volume != temp && devc->use_slider) {
  		devc->slider_vol = slider_volume;
  
  		waveartist_set_mixer(devc, SOUND_MIXER_VOLUME,
  			slider_volume | slider_volume << 8);
  
  		return 1;
  	}
  
  	return 0;
  }
  
  static void
  vnc_slider_tick(unsigned long data)
  {
  	int next_timeout;
  
  	if (vnc_slider(adev_info + data))
  		next_timeout = 5;	// mixer reported change
  	else
  		next_timeout = VNC_TIMER_PERIOD;
  
  	mod_timer(&vnc_timer, jiffies + next_timeout);
  }
  
  static int
  vnc_private_ioctl(int dev, unsigned int cmd, int __user * arg)
  {
  	wavnc_info *devc = (wavnc_info *)audio_devs[dev]->devc;
  	int val;
  
  	switch (cmd) {
  	case SOUND_MIXER_PRIVATE1:
  	{
  		u_int prev_spkr_mute, prev_line_mute, prev_auto_state;
  		int val;
  
  		if (get_user(val, arg))
  			return -EFAULT;
  
  		/* check if parameter is logical */
  		if (val & ~(VNC_MUTE_INTERNAL_SPKR |
  			    VNC_MUTE_LINE_OUT |
  			    VNC_DISABLE_AUTOSWITCH))
  			return -EINVAL;
  
  		prev_auto_state = devc->no_autoselect;
  		prev_spkr_mute  = devc->spkr_mute_state;
  		prev_line_mute  = devc->line_mute_state;
  
  		devc->no_autoselect   = (val & VNC_DISABLE_AUTOSWITCH) ? 1 : 0;
  		devc->spkr_mute_state = (val & VNC_MUTE_INTERNAL_SPKR) ? 1 : 0;
  		devc->line_mute_state = (val & VNC_MUTE_LINE_OUT) ? 1 : 0;
  
  		if (prev_spkr_mute != devc->spkr_mute_state)
  			vnc_mute_spkr(devc);
  
  		if (prev_line_mute != devc->line_mute_state)
  			vnc_mute_lout(devc);
  
  		if (prev_auto_state != devc->no_autoselect)
  			vnc_configure_mixer(devc, devc->recmask);
  
  		return 0;
  	}
  
  	case SOUND_MIXER_PRIVATE2:
  		if (get_user(val, arg))
  			return -EFAULT;
  
  		switch (val) {
  #define VNC_SOUND_PAUSE         0x53    //to pause the DSP
  #define VNC_SOUND_RESUME        0x57    //to unpause the DSP
  		case VNC_SOUND_PAUSE:
  			waveartist_cmd1(devc, 0x16);
  			break;
  
  		case VNC_SOUND_RESUME:
  			waveartist_cmd1(devc, 0x18);
  			break;
  
  		default:
  			return -EINVAL;
  		}
  		return 0;
  
  	/* private ioctl to allow bulk access to waveartist */
  	case SOUND_MIXER_PRIVATE3:
  	{
  		unsigned long	flags;
  		int		mixer_reg[15], i, val;
  
  		if (get_user(val, arg))
  			return -EFAULT;
  		if (copy_from_user(mixer_reg, (void *)val, sizeof(mixer_reg)))
  			return -EFAULT;
  
  		switch (mixer_reg[14]) {
  		case MIXER_PRIVATE3_RESET:
  			waveartist_mixer_reset(devc);
  			break;
  
  		case MIXER_PRIVATE3_WRITE:
  			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[0], mixer_reg[4]);
  			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[1], mixer_reg[5]);
  			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[2], mixer_reg[6]);
  			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[3], mixer_reg[7]);
  			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[8], mixer_reg[9]);
  
  			waveartist_cmd3(devc, WACMD_SET_LEVEL, mixer_reg[10], mixer_reg[11]);
  			waveartist_cmd3(devc, WACMD_SET_LEVEL, mixer_reg[12], mixer_reg[13]);
  			break;
  
  		case MIXER_PRIVATE3_READ:
  			spin_lock_irqsave(&waveartist_lock, flags);
  
  			for (i = 0x30; i < 14 << 8; i += 1 << 8)
  				waveartist_cmd(devc, 1, &i, 1, mixer_reg + (i >> 8));
  
  			spin_unlock_irqrestore(&waveartist_lock, flags);
  
  			if (copy_to_user((void *)val, mixer_reg, sizeof(mixer_reg)))
  				return -EFAULT;
  			break;
  
  		default:
  			return -EINVAL;
  		}
  		return 0;
  	}
  
  	/* read back the state from PRIVATE1 */
  	case SOUND_MIXER_PRIVATE4:
  		val = (devc->spkr_mute_state  ? VNC_MUTE_INTERNAL_SPKR : 0) |
  		      (devc->line_mute_state  ? VNC_MUTE_LINE_OUT      : 0) |
  		      (devc->handset_detect   ? VNC_HANDSET_DETECT     : 0) |
  		      (devc->telephone_detect ? VNC_PHONE_DETECT       : 0) |
  		      (devc->no_autoselect    ? VNC_DISABLE_AUTOSWITCH : 0);
  
  		return put_user(val, arg) ? -EFAULT : 0;
  	}
  
  	if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
  		/*
  		 * special case for master volume: if we
  		 * received this call - switch from hw
  		 * volume control to a software volume
  		 * control, till the hw volume is modified
  		 * to signal that user wants to be back in
  		 * hardware...
  		 */
  		if ((cmd & 0xff) == SOUND_MIXER_VOLUME)
  			devc->use_slider = 0;
  
  		/* speaker output            */
  		if ((cmd & 0xff) == SOUND_MIXER_SPEAKER) {
  			unsigned int val, l, r;
  
  			if (get_user(val, arg))
  				return -EFAULT;
  
  			l = val & 0x7f;
  			r = (val & 0x7f00) >> 8;
  			val = (l + r) / 2;
  			devc->levels[SOUND_MIXER_SPEAKER] = val | (val << 8);
  			devc->spkr_mute_state = (val <= 50);
  			vnc_mute_spkr(devc);
  			return 0;
  		}
  	}
  
  	return -ENOIOCTLCMD;
  }
  
  #endif
  
  static struct address_info cfg;
  
  static int attached;
  
  static int __initdata io = 0;
  static int __initdata irq = 0;
  static int __initdata dma = 0;
  static int __initdata dma2 = 0;
  
  
  static int __init init_waveartist(void)
  {
  	const struct waveartist_mixer_info *mix;
  
  	if (!io && machine_is_netwinder()) {
  		/*
  		 * The NetWinder WaveArtist is at a fixed address.
  		 * If the user does not supply an address, use the
  		 * well-known parameters.
  		 */
  		io   = 0x250;
  		irq  = 12;
  		dma  = 3;
  		dma2 = 7;
  	}
  
  	mix = &waveartist_mixer;
  #ifdef CONFIG_ARCH_NETWINDER
  	if (machine_is_netwinder())
  		mix = &netwinder_mixer;
  #endif
  
  	cfg.io_base = io;
  	cfg.irq = irq;
  	cfg.dma = dma;
  	cfg.dma2 = dma2;
  
  	if (!probe_waveartist(&cfg))
  		return -ENODEV;
  
  	attach_waveartist(&cfg, mix);
  	attached = 1;
  
  	return 0;
  }
  
  static void __exit cleanup_waveartist(void)
  {
  	if (attached)
  		unload_waveartist(&cfg);
  }
  
  module_init(init_waveartist);
  module_exit(cleanup_waveartist);
  
  #ifndef MODULE
  static int __init setup_waveartist(char *str)
  {
  	/* io, irq, dma, dma2 */
  	int ints[5];
  	
  	str = get_options(str, ARRAY_SIZE(ints), ints);
  	
  	io	= ints[1];
  	irq	= ints[2];
  	dma	= ints[3];
  	dma2	= ints[4];
  
  	return 1;
  }
  __setup("waveartist=", setup_waveartist);
  #endif
  
  MODULE_DESCRIPTION("Rockwell WaveArtist RWA-010 sound driver");
  module_param(io, int, 0);		/* IO base */
  module_param(irq, int, 0);		/* IRQ */
  module_param(dma, int, 0);		/* DMA */
  module_param(dma2, int, 0);		/* DMA2 */
  MODULE_LICENSE("GPL");