cs4281.c

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//*****************************************************************************
//
//      "cs4281.c" --  Cirrus Logic-Crystal CS4281 linux audio driver.
//
//      Copyright (C) 2000  Cirrus Logic Corp.  
//            -- adapted from drivers by Thomas Sailer, 
//            -- but don't bug him; Problems should go to:
//            -- gw boynton ([e-mail]) or
//            -- tom woller ([e-mail]).
//
//      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.
//
// Module command line parameters:
//   none
//
//  Supported devices:
//  /dev/dsp    standard /dev/dsp device, (mostly) OSS compatible
//  /dev/mixer  standard /dev/mixer device, (mostly) OSS compatible
//  /dev/midi   simple MIDI UART interface, no ioctl
//
// Modification History
// 08/20/00 trw - silence and no stopping DAC until release
// 08/23/00 trw - added CS_DBG statements, fix interrupt hang issue on DAC stop.
// 09/18/00 trw - added 16bit only record with conversion 
// 09/24/00 trw - added Enhanced Full duplex (separate simultaneous 
//                capture/playback rates)
// 10/03/00 trw - fixed mmap (fixed GRECORD and the XMMS mmap test plugin  
//                libOSSm.so)
// 10/11/00 trw - modified for 2.4.0-test9 kernel enhancements (NR_MAP removal)
// 11/03/00 trw - fixed interrupt loss/stutter, added debug.
// 11/10/00 bkz - added __devinit to cs4281_hw_init()
//
// *****************************************************************************

#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/sound.h>
#include <linux/malloc.h>
#include <linux/soundcard.h>
#include <linux/pci.h>
#include <linux/bitops.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/smp_lock.h>
#include <linux/wrapper.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
//#include <linux/vmalloc.h>
#include "dm.h"
#include "cs4281_hwdefs.h"

EXPORT_NO_SYMBOLS;

#undef OSS_DOCUMENTED_MIXER_SEMANTICS

// --------------------------------------------------------------------- 

#ifndef PCI_VENDOR_ID_CIRRUS
#define PCI_VENDOR_ID_CIRRUS          0x1013
#endif
#ifndef PCI_DEVICE_ID_CRYSTAL_CS4281
#define PCI_DEVICE_ID_CRYSTAL_CS4281  0x6005
#endif

#define CS4281_MAGIC  ((PCI_DEVICE_ID_CRYSTAL_CS4281<<16) | PCI_VENDOR_ID_CIRRUS)

// Turn on/off debugging compilation by using 1/0 respectively for CSDEBUG
//
#define CSDEBUG_INTERFACE 1
#define CSDEBUG 1
//
// CSDEBUG is usual mode is set to 1, then use the
// cs_debuglevel and cs_debugmask to turn on or off debugging.
// Debug level of 1 has been defined to be kernel errors and info
// that should be printed on any released driver.
//
#if CSDEBUG
extern unsigned long cs_debugmask;
extern unsigned long cs_debuglevel;
#define CS_DBGOUT(mask,level,x) if((cs_debuglevel >= (level)) && ((mask) & cs_debugmask) ) {x;}
#else
#define CS_DBGOUT(mask,level,x)
#endif
//
// cs_debugmask areas
//
#define CS_INIT	 	0x00000001	// initialization and probe functions
#define CS_ERROR 	0x00000002	// tmp debugging bit placeholder
#define CS_INTERRUPT	0x00000004	// interrupt handler (separate from all other)
#define CS_FUNCTION 	0x00000008	// enter/leave functions
#define CS_WAVE_WRITE 	0x00000010	// write information for wave
#define CS_WAVE_READ 	0x00000020	// read information for wave
#define CS_MIDI_WRITE 	0x00000040	// write information for midi
#define CS_MIDI_READ 	0x00000080	// read information for midi
#define CS_MPU401_WRITE 0x00000100	// write information for mpu401
#define CS_MPU401_READ 	0x00000200	// read information for mpu401
#define CS_OPEN		0x00000400	// all open functions in the driver
#define CS_RELEASE	0x00000800	// all release functions in the driver
#define CS_PARMS	0x00001000	// functional and operational parameters
#define CS_IOCTL	0x00002000	// ioctl (non-mixer)
#define CS_TMP		0x10000000	// tmp debug mask bit

#if CSDEBUG
static unsigned long cs_debuglevel = 1;	// levels range from 1-9
static unsigned long cs_debugmask = CS_INIT | CS_ERROR;	// use CS_DBGOUT with various mask values
#if MODULE
MODULE_PARM(cs_debuglevel, "i");
MODULE_PARM(cs_debugmask, "i");
#endif
#endif

// MIDI buffer sizes 
#define MIDIINBUF  500
#define MIDIOUTBUF 500

#define FMODE_MIDI_SHIFT 3
#define FMODE_MIDI_READ  (FMODE_READ << FMODE_MIDI_SHIFT)
#define FMODE_MIDI_WRITE (FMODE_WRITE << FMODE_MIDI_SHIFT)

#define RSRCISIOREGION(dev,num) ((dev)->resource[(num)].start != 0 && \
	 ((dev)->resource[(num)].flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO)
#define RSRCISMEMORYREGION(dev,num) ((dev)->resource[(num)].start != 0 && \
	 ((dev)->resource[(num)].flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY)
#define RSRCADDRESS(dev,num) ((dev)->resource[(num)].start)

#define CS4281_MAJOR_VERSION 	1
#define CS4281_MINOR_VERSION 	1
#ifdef __ia64__
#define CS4281_ARCH	     	64	//architecture key
#else
#define CS4281_ARCH	     	32	//architecture key
#endif

#define CS_TYPE_ADC 0
#define CS_TYPE_DAC 1

struct cs4281_state {
	// magic 
	unsigned int magic;

	// we keep the cards in a linked list 
	struct cs4281_state *next;

	// pcidev is needed to turn off the DDMA controller at driver shutdown 
	struct pci_dev *pcidev;

	// soundcore stuff 
	int dev_audio;
	int dev_mixer;
	int dev_midi;

	// hardware resources 
	unsigned int pBA0phys, pBA1phys;
	char *pBA0, *pBA1;
	unsigned int irq;

	// mixer registers 
	struct {
		unsigned short vol[10];
		unsigned int recsrc;
		unsigned int modcnt;
		unsigned short micpreamp;
	} mix;

	// wave stuff   
	struct properties {
		unsigned fmt;
		unsigned fmt_original;	// original requested format
		unsigned channels;
		unsigned rate;
		unsigned char clkdiv;
	} prop_dac, prop_adc;
	unsigned conversion:1;	// conversion from 16 to 8 bit in progress
	void *tmpbuff;		// tmp buffer for sample conversions
	unsigned ena;
	spinlock_t lock;
	struct semaphore open_sem;
	struct semaphore open_sem_adc;
	struct semaphore open_sem_dac;
	mode_t open_mode;
	wait_queue_head_t open_wait;
	wait_queue_head_t open_wait_adc;
	wait_queue_head_t open_wait_dac;

	dma_addr_t dmaaddr_tmpbuff;
	unsigned buforder_tmpbuff;	// Log base 2 of 'rawbuf' size in bytes..
	struct dmabuf {
		void *rawbuf;	// Physical address of  
		dma_addr_t dmaaddr;
		unsigned buforder;	// Log base 2 of 'rawbuf' size in bytes..
		unsigned numfrag;	// # of 'fragments' in the buffer.
		unsigned fragshift;	// Log base 2 of fragment size.
		unsigned hwptr, swptr;
		unsigned total_bytes;	// # bytes process since open.
		unsigned blocks;	// last returned blocks value GETOPTR
		unsigned wakeup;	// interrupt occurred on block 
		int count;
		unsigned error;	// over/underrun 
		wait_queue_head_t wait;
		// redundant, but makes calculations easier 
		unsigned fragsize;	// 2**fragshift..
		unsigned dmasize;	// 2**buforder.
		unsigned fragsamples;
		// OSS stuff 
		unsigned mapped:1;	// Buffer mapped in cs4281_mmap()?
		unsigned ready:1;	// prog_dmabuf_dac()/adc() successful?
		unsigned endcleared:1;
		unsigned type:1;	// adc or dac buffer (CS_TYPE_XXX)
		unsigned ossfragshift;
		int ossmaxfrags;
		unsigned subdivision;
	} dma_dac, dma_adc;

	// midi stuff 
	struct {
		unsigned ird, iwr, icnt;
		unsigned ord, owr, ocnt;
		wait_queue_head_t iwait;
		wait_queue_head_t owait;
		struct timer_list timer;
		unsigned char ibuf[MIDIINBUF];
		unsigned char obuf[MIDIOUTBUF];
	} midi;

};

#if CSDEBUG

// DEBUG ROUTINES

#define SOUND_MIXER_CS_GETDBGLEVEL 	_SIOWR('M',120, int)
#define SOUND_MIXER_CS_SETDBGLEVEL 	_SIOWR('M',121, int)
#define SOUND_MIXER_CS_GETDBGMASK 	_SIOWR('M',122, int)
#define SOUND_MIXER_CS_SETDBGMASK 	_SIOWR('M',123, int)

#define SNDCTL_DSP_CS_GETDBGLEVEL 	_SIOWR('P', 50, int)
#define SNDCTL_DSP_CS_SETDBGLEVEL 	_SIOWR('P', 51, int)
#define SNDCTL_DSP_CS_GETDBGMASK 	_SIOWR('P', 52, int)
#define SNDCTL_DSP_CS_SETDBGMASK 	_SIOWR('P', 53, int)

static void printioctl(unsigned int x)
{
	unsigned int i;
	unsigned char vidx;
	// Index of mixtable1[] member is Device ID 
	// and must be <= SOUND_MIXER_NRDEVICES.
	// Value of array member is index into s->mix.vol[]
	static const unsigned char mixtable1[SOUND_MIXER_NRDEVICES] = {
		[SOUND_MIXER_PCM] = 1,	// voice 
		[SOUND_MIXER_LINE1] = 2,	// AUX
		[SOUND_MIXER_CD] = 3,	// CD 
		[SOUND_MIXER_LINE] = 4,	// Line 
		[SOUND_MIXER_SYNTH] = 5,	// FM
		[SOUND_MIXER_MIC] = 6,	// Mic 
		[SOUND_MIXER_SPEAKER] = 7,	// Speaker 
		[SOUND_MIXER_RECLEV] = 8,	// Recording level 
		[SOUND_MIXER_VOLUME] = 9	// Master Volume 
	};

	switch (x) {
	case SOUND_MIXER_CS_GETDBGMASK:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SOUND_MIXER_CS_GETDBGMASK:\n"));
		break;
	case SOUND_MIXER_CS_GETDBGLEVEL:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SOUND_MIXER_CS_GETDBGLEVEL:\n"));
		break;
	case SOUND_MIXER_CS_SETDBGMASK:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SOUND_MIXER_CS_SETDBGMASK:\n"));
		break;
	case SOUND_MIXER_CS_SETDBGLEVEL:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SOUND_MIXER_CS_SETDBGLEVEL:\n"));
		break;
	case OSS_GETVERSION:
		CS_DBGOUT(CS_IOCTL, 4, printk("OSS_GETVERSION:\n"));
		break;
	case SNDCTL_DSP_SYNC:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SYNC:\n"));
		break;
	case SNDCTL_DSP_SETDUPLEX:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETDUPLEX:\n"));
		break;
	case SNDCTL_DSP_GETCAPS:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETCAPS:\n"));
		break;
	case SNDCTL_DSP_RESET:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_RESET:\n"));
		break;
	case SNDCTL_DSP_SPEED:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SPEED:\n"));
		break;
	case SNDCTL_DSP_STEREO:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_STEREO:\n"));
		break;
	case SNDCTL_DSP_CHANNELS:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_CHANNELS:\n"));
		break;
	case SNDCTL_DSP_GETFMTS:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETFMTS:\n"));
		break;
	case SNDCTL_DSP_SETFMT:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETFMT:\n"));
		break;
	case SNDCTL_DSP_POST:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_POST:\n"));
		break;
	case SNDCTL_DSP_GETTRIGGER:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETTRIGGER:\n"));
		break;
	case SNDCTL_DSP_SETTRIGGER:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETTRIGGER:\n"));
		break;
	case SNDCTL_DSP_GETOSPACE:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETOSPACE:\n"));
		break;
	case SNDCTL_DSP_GETISPACE:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETISPACE:\n"));
		break;
	case SNDCTL_DSP_NONBLOCK:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_NONBLOCK:\n"));
		break;
	case SNDCTL_DSP_GETODELAY:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETODELAY:\n"));
		break;
	case SNDCTL_DSP_GETIPTR:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETIPTR:\n"));
		break;
	case SNDCTL_DSP_GETOPTR:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETOPTR:\n"));
		break;
	case SNDCTL_DSP_GETBLKSIZE:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETBLKSIZE:\n"));
		break;
	case SNDCTL_DSP_SETFRAGMENT:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SNDCTL_DSP_SETFRAGMENT:\n"));
		break;
	case SNDCTL_DSP_SUBDIVIDE:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SUBDIVIDE:\n"));
		break;
	case SOUND_PCM_READ_RATE:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_RATE:\n"));
		break;
	case SOUND_PCM_READ_CHANNELS:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SOUND_PCM_READ_CHANNELS:\n"));
		break;
	case SOUND_PCM_READ_BITS:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_BITS:\n"));
		break;
	case SOUND_PCM_WRITE_FILTER:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SOUND_PCM_WRITE_FILTER:\n"));
		break;
	case SNDCTL_DSP_SETSYNCRO:
		CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETSYNCRO:\n"));
		break;
	case SOUND_PCM_READ_FILTER:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_FILTER:\n"));
		break;
	case SNDCTL_DSP_CS_GETDBGMASK:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SNDCTL_DSP_CS_GETDBGMASK:\n"));
		break;
	case SNDCTL_DSP_CS_GETDBGLEVEL:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SNDCTL_DSP_CS_GETDBGLEVEL:\n"));
		break;
	case SNDCTL_DSP_CS_SETDBGMASK:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SNDCTL_DSP_CS_SETDBGMASK:\n"));
		break;
	case SNDCTL_DSP_CS_SETDBGLEVEL:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk("SNDCTL_DSP_CS_SETDBGLEVEL:\n"));
		break;

	case SOUND_MIXER_PRIVATE1:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE1:\n"));
		break;
	case SOUND_MIXER_PRIVATE2:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE2:\n"));
		break;
	case SOUND_MIXER_PRIVATE3:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE3:\n"));
		break;
	case SOUND_MIXER_PRIVATE4:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE4:\n"));
		break;
	case SOUND_MIXER_PRIVATE5:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE5:\n"));
		break;
	case SOUND_MIXER_INFO:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_INFO:\n"));
		break;
	case SOUND_OLD_MIXER_INFO:
		CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_OLD_MIXER_INFO:\n"));
		break;

	default:
		switch (_IOC_NR(x)) {
		case SOUND_MIXER_VOLUME:
			CS_DBGOUT(CS_IOCTL, 4,
				  printk("SOUND_MIXER_VOLUME:\n"));
			break;
		case SOUND_MIXER_SPEAKER:
			CS_DBGOUT(CS_IOCTL, 4,
				  printk("SOUND_MIXER_SPEAKER:\n"));
			break;
		case SOUND_MIXER_RECLEV:
			CS_DBGOUT(CS_IOCTL, 4,