wtaudioout.c

MCF5249的音频驱动程序,可以实现PCM的实时播放和采集

/****************************************************************************/

/*
 *	WTAudioOut.c -- audio driver for M5249 ColdFire internal audio.
 *
 *	(C) Copyright 2004, AKGU 
 */

/****************************************************************************/

#ifdef   MODULE
#include <linux/module.h>
#include <linux/version.h>
#else
#define MOD_INC_USE_COUNT
#define MOD_DEC_USE_COUNT
#endif


#ifndef __KERNEL__
#define __KERNEL__
#endif

#include <linux/config.h>

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/soundcard.h>
#include <linux/ioctl.h>
#include <linux/mm.h>
#include <asm/uaccess.h>
#include <asm/param.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/page.h>
#include <asm/io.h>
#include <asm/semaphore.h>


/****************************************************************************/
//#define DEBUG 1
//#define MYDEBUG 1
#ifdef DEBUG
#define KDEBUG(fmt, args...) printk(fmt, ##args)
#else
#define KDEBUG(fmt, args...)	
#endif

//#define NOMAP

//#define MYDEBUG 1
/****************************************************************************/
//DATA TYPE DEFINE
#define DWORD volatile  unsigned long
#define BYTE  volatile  unsigned char
#define WORD volatile unsigned short

/****************************************************************************/

/* Whether include receive functions */
//#define RX

/*	You can choose to use either interrupt or DMA here.
 *	DMA will give you much better CPU utilitization... */
//#define CONFIG_TXIRQ	1
#define CONFIG_TXDMA	1

//Only PDIR2 and PDOR3 registers support DMA
//Both DMA1req and DMA0req can be routed to DMA channel 0 or DMA channel 1.
//DMA Config Register Address(MBAR2+0x9f)
//DMACon[1:0] = [DMA1REQ:DMA0REQ]  -- 0(PDIR2)... 1(PDOR3)
#define INTBASE 128

//#define	WTAUDIO_TXIRQ	(INTBASE+4)	/* Audio TX FIFO IRQ (IIS1) */
                                                               /* WRITE TO FIFO IIS1 */
                                                               
#define	WTAUDIO_TXDMAIRQ	120	/* Audio TX DMA IRQ */
#define	WTAUDIO_TXDMA		0	/* Audio TX DMA channel */

/****************************************************************************/

/*
 *	Driver configurable settings.
*/
//#define       BUFSIZE         (256*1024)      /* Audio buffer data size */

#define ADSAMP_PER_PACK 	((508-4)*2+1)           //1包adpcm 的数据转换成upcm给音频芯片所需要声请的缓冲区大小
#define BUFSIZE 		(128*4*ADSAMP_PER_PACK)		 /* Audio buffer data size (缓冲区分成4块进行DMA传输)*/
#define DMASIZE                 (32*4*ADSAMP_PER_PACK)           /* DMA buffer maximum size （1/4 buffer）*/ 
#define PACKCOUNT               (BUFSIZE/ADSAMP_PER_PACK)	//缓冲区包个数
#define DMACOUNT                (DMASIZE/ADSAMP_PER_PACK)	//DMA缓冲区最大包个数

#define AUDIOOUTMAJOR	253
#define FIELDNUM	6

int WTAudio_txbusy,WTAudio_txdmaing,WTAudio_isopen;

//struct semaphore sem;
//BYTE DelayBuf[ADSAMP_PER_PACK];
/****************************************************************************/
#define IOC_MAGIC ('k')
#define IOCASTOP _IO(IOC_MAGIC,0)
#define IOCASTART _IO(IOC_MAGIC,1)
#define IOCASPACKSIZE _IOW(IOC_MAGIC,2,int)
#define IOCAGDEVBUFSTATUS _IOR(IOC_MAGIC,3,sizeof(WTDevBufStatus))
#define IOCAGDEVSTATUS _IOR(IOC_MAGIC,4,sizeof(WTAudio_dev)) 

/****************************************************************************/
//***  base register define
#define MCF_MBAR 0x10000000
#define MCF_MBAR2 0x80000000
/*
 *	Quick and easy access to the audio registers. (This optimizes
 *	nicely, since it will almost always be a constant pointer).
 */
 //***   pointer for mem space
#define	mcf32p(r)	((DWORD *) (r))
#define	mcf16p(r)	((WORD *) (r))
#define	mcf8p(r)	((BYTE *) (r))

//***   pointer for mbar register
#define	mcfReg32p(r)	(mcf32p(MCF_MBAR + (r)))
#define	mcfReg16p(r)	(mcf16p(MCF_MBAR + (r)))
#define	mcfReg8p(r) 	(mcf8p(MCF_MBAR + (r)))

//***   pointer for 5249 mbar2 register
#define	mcf2Reg32p(r)	(mcf32p(MCF_MBAR2 + (r)))
#define	mcf2Reg16p(r)	(mcf16p(MCF_MBAR2 + (r)))
#define	mcf2Reg8p(r) 	(mcf8p(MCF_MBAR2 + (r)))


/* register define */
#define   MCFSIM_IMR              0x44 /* Interrupt Mask reg (r/w) */

#define	MCFSIM_ICRDMA0	0x52 /* DMA 0 ICR [ICR6]*/
#define	MCFSIM_IMR_DMA0	0x4000		/* DMA 0 intr */
#define	MCFSIM_ICRDMA1	0x53 /* DMA 1 ICR [ICR7]*/
#define	MCFSIM_IMR_DMA1	0x8000		/* DMA 0 intr */

/*
 *	Flags for the DMA configuration register.
 */
#define	MCFA_DMA_0REQ		0x01		/* PDOR3 DMA on chan 0 */
#define	MCFA_DMA_1REQ		0x02		/* PDOR3 DMA on chan 1 */
/*	DMA register base mbr*/
#define 	MCFDMA_INTVR0			0x314            /* DMA0 interrupt vec (r/w) */
#define   MCFDAM_INTVR1               0x354		/* DMA1 interrupt vec (r/w) */


#define	MCFA_IISCONFIG		0x10		/* IIS config regs (r/w) */
#define	MCFA_IIS1CONFIG		0x10		/* IIS1 config reg (r/w) */
#define	MCFA_IIS2CONFIG		0x14		/* IIS2 config reg (r/w) */
#define	MCFA_IIS3CONFIG		0x18		/* IIS3 config reg (r/w) */
#define	MCFA_IIS4CONFIG		0x1c		/* IIS4 config reg (r/w) */

#define	MCFA_DATAINCTRL		0x30		/* Data in Control reg (r/w) */

/*
 *	Bit definitions for the ICR family of registers.
 */
#define	MCFSIM_ICR_AUTOVEC	0x80		/* Auto-vectored intr */
#define	MCFSIM_ICR_LEVEL0	0x00		/* Level 0 intr */
#define	MCFSIM_ICR_LEVEL1	0x04		/* Level 1 intr */
#define	MCFSIM_ICR_LEVEL2	0x08		/* Level 2 intr */
#define	MCFSIM_ICR_LEVEL3	0x0c		/* Level 3 intr */
#define	MCFSIM_ICR_LEVEL4	0x10		/* Level 4 intr */
#define	MCFSIM_ICR_LEVEL5	0x14		/* Level 5 intr */
#define	MCFSIM_ICR_LEVEL6	0x18		/* Level 6 intr */
#define	MCFSIM_ICR_LEVEL7	0x1c		/* Level 7 intr */

#define	MCFSIM_ICR_PRI0		0x00		/* Priority 0 intr */
#define	MCFSIM_ICR_PRI1		0x01		/* Priority 1 intr */
#define	MCFSIM_ICR_PRI2		0x02		/* Priority 2 intr */
#define	MCFSIM_ICR_PRI3		0x03		/* Priority 3 intr */

#define	MCFA_DMACONF		0x9f		/* Audio DMA config (r/w) */
#define	MCFSIM2_DMAROUTE	0x188		/* DMA routing */

#define	MCFA_PDIR1L		0x34		/* Data in left #1 (r) */
#define	MCFA_PDIR3L		0x44		/* Data in left #3 (r) */
#define	MCFA_PDIR1R		0x54		/* Data in right #1 (r) */
#define	MCFA_PDIR3R		0x64		/* Data in right #3 (r) */
#define	MCFA_PDOR1L		0x34		/* Data out left #1 (w) */
#define	MCFA_PDOR1R		0x44		/* Data out right #1 (w) */
#define	MCFA_PDOR2L		0x54		/* Data out left #2 (w) */
#define	MCFA_PDOR2R		0x64		/* Data out right #2 (w) */
#define	MCFA_PDOR3		0x74		/* Data out l+r #3 (w) */
#define	MCFA_PDIR2		       0x74		/* Data in l+r #2 (w) */

#define	MCFA_INTENABLE		0x94		/* Interrupt enable (r/w) */
#define	MCFA_INTCLEAR		0x98		/* Interrupt clear (w) */
#define	MCFA_INTSTAT		0x98		/* Interupt status (r) */

/*
 *	Flag defines for the IIS configuration registers.
 */
#define	MCFA_IIS_EFCFLG		0x00040000	/* EF/CFLG insert */
#define	MCFA_IIS_CFLGPOS	0x00020000	/* CFLG sample position */
#define	MCFA_IIS_CLKINPUT	0x00000000	/* CLK is SCLK/LRCLK input */
#define	MCFA_IIS_CLK24		0x00001000	/* CLK is AudioClk/24 */
#define	MCFA_IIS_CLK16		0x00002000	/* CLK is AudioClk/16 */
#define	MCFA_IIS_CLK12		0x00003000	/* CLK is AudioClk/12 */
#define	MCFA_IIS_CLK8		0x00004000	/* CLK is AudioClk/8 */
#define	MCFA_IIS_CLK6		0x00005000	/* CLK is AudioClk/6 */
#define	MCFA_IIS_CLK4		0x00006000	/* CLK is AudioClk/4 */
#define	MCFA_IIS_CLK3		0x00007000	/* CLK is AudioClk/3 */
#define	MCFA_IIS_CLK2		0x0000c000	/* CLK is AudioClk/2 */
#define	MCFA_IIS_CLKIIS1	0x00008000	/* CLK is IIS1 clock */
#define	MCFA_IIS_CLKIIS2	0x00009000	/* CLK is IIS2 clock */
#define	MCFA_IIS_CLKIIS3	0x0000a000	/* CLK is IIS3 clock */
#define	MCFA_IIS_CLKIIS4	0x0000b000	/* CLK is IIS4 clock */
#define	MCFA_IIS_FIFO		0x00000000	/* Normal FIFO operation */
#define	MCFA_IIS_FIFO1		0x00000800	/* 1 sample FIFO mode */
#define	MCFA_IIS_TXSRC_0	0x00000000	/* TX source is digital 0 */
#define	MCFA_IIS_TXSRC_PDOR1	0x00000100	/* TX source is PDOR1 */
#define	MCFA_IIS_TXSRC_PDOR2	0x00000200	/* TX source is PDOR2 */
#define	MCFA_IIS_TXSRC_PDOR3	0x00000300	/* TX source is PDOR3 */
#define	MCFA_IIS_TXSRC_IIS1	0x00000400	/* TX source is IIS1 in data */
#define	MCFA_IIS_TXSRC_IIS3	0x00000500	/* TX source is IIS3 in data */
#define	MCFA_IIS_TXSRC_IIS4	0x00000600	/* TX source is IIS4 in data */
#define	MCFA_IIS_TXSRC_EBU	0x00000700	/* TX source is EBU in data */
#define	MCFA_IIS_TXSRC_EBU2	0x00010000	/* TX source is EBU2 in data */
#define	MCFA_IIS_16BIT		0x00000000	/* 16 bit samples */
#define	MCFA_IIS_18BIT		0x00000040	/* 18 bit samples */
#define	MCFA_IIS_20BIT		0x00000080	/* 20 bit samples */
#define	MCFA_IIS_0BIT		0x000000c0	/* 0 sample */
#define	MCFA_IIS_MODE_IIS	0x00000000	/* Philips IIS mode */
#define	MCFA_IIS_MODE_EIAJ	0x00000000	/* Sony EIAJ mode */
#define	MCFA_IIS_LRCK64BIT	0x00000010	/* LRCK frequency 64 bit clk */
#define	MCFA_IIS_LRCK48BIT	0x00000008	/* LRCK frequency 48 bit clk */
#define	MCFA_IIS_LRCK32BIT	0x00000000	/* LRCK frequency 32 bit clk */
#define	MCFA_IIS_LRCKINV	0x00000002	/* Invert LRCK */
#define	MCFA_IIS_SCLKINV	0x00000001	/* Invert SCLK */

/*
 *	Data in Control register flags.
 */
#define	MCFA_DIC_PDIR3_0	0x00800000	/* PDIR3 zero control */
#define	MCFA_DIC_PDIR3_RESET	0x00400000	/* PDIR3 reset */
#define	MCFA_DIC_PDIR3_1SAMP	0x00000000	/* PDIR3 full on 1 sample */
#define	MCFA_DIC_PDIR3_2SAMP	0x00100000	/* PDIR3 full on 2 sample */
#define	MCFA_DIC_PDIR3_3SAMP	0x00200000	/* PDIR3 full on 3 sample */
#define	MCFA_DIC_PDIR3_6SAMP	0x00300000	/* PDIR3 full on 6 sample */
#define	MCFA_DIC_PDIR3_OFF	0x00000000	/* PDIR3 Disabled */
#define	MCFA_DIC_PDIR3_PDOR1	0x00010000	/* PDIR3 PDOR1 data */
#define	MCFA_DIC_PDIR3_PDOR2	0x00020000	/* PDIR3 PDOR2 data */
#define	MCFA_DIC_PDIR3_IIS1	0x00040000	/* PDIR3 IIS1 receiver data */
#define	MCFA_DIC_PDIR3_IIS3	0x00050000	/* PDIR3 IIS3 receiver data */
#define	MCFA_DIC_PDIR3_IIS4	0x00060000	/* PDIR3 IIS4 receiver data */
#define	MCFA_DIC_PDIR3_EBU1	0x00070000	/* PDIR3 EBU1 receiver data */
#define	MCFA_DIC_PDIR3_EBU2	0x00080000	/* PDIR3 EBU2 receiver data */
#define	MCFA_DIC_PDIR2_1SAMP	0x00000000	/* PDIR2 full on 1 sample */
#define	MCFA_DIC_PDIR2_2SAMP	0x00004000	/* PDIR2 full on 2 sample */
#define	MCFA_DIC_PDIR2_3SAMP	0x00008000	/* PDIR2 full on 3 sample */
#define	MCFA_DIC_PDIR2_6SAMP	0x0000c000	/* PDIR2 full on 6 sample */
#define	MCFA_DIC_PDIR2_0	0x00000800	/* PDIR2 zero control */
#define	MCFA_DIC_PDIR1_0	0x00000400	/* PDIR1 zero control */
#define	MCFA_DIC_PDIR2_RESET	0x00000200	/* PDIR2 reset */
#define	MCFA_DIC_PDIR1_RESET	0x00000100	/* PDIR1 reset */
#define	MCFA_DIC_PDIR1_1SAMP	0x00000000	/* PDIR1 full on 1 sample */
#define	MCFA_DIC_PDIR1_2SAMP	0x00000040	/* PDIR1 full on 2 sample */
#define	MCFA_DIC_PDIR1_3SAMP	0x00000080	/* PDIR1 full on 3 sample */
#define	MCFA_DIC_PDIR1_6SAMP	0x000000c0	/* PDIR1 full on 6 sample */
#define	MCFA_DIC_PDIR2_OFF	0x00000000	/* PDIR2 disable */
#define	MCFA_DIC_PDIR2_PDOR1	0x00000008	/* PDIR2 PDOR1 data */
#define	MCFA_DIC_PDIR2_PDOR2	0x00000010	/* PDIR2 PDOR2 data */
#define	MCFA_DIC_PDIR2_IIS1	0x00000020	/* PDIR2 IIS1 data */
#define	MCFA_DIC_PDIR2_IIS3	0x00000028	/* PDIR2 IIS3 data */
#define	MCFA_DIC_PDIR2_IIS4	0x00000030	/* PDIR2 IIS4 data */
#define	MCFA_DIC_PDIR2_EBU1	0x00000038	/* PDIR2 EBU1 data */
#define	MCFA_DIC_PDIR2_EBU2	0x00002000	/* PDIR2 EBU1 data */
#define	MCFA_DIC_PDIR1_OFF	0x00000000	/* PDIR1 disable */
#define	MCFA_DIC_PDIR1_PDOR1	0x00000001	/* PDIR1 PDOR1 data */
#define	MCFA_DIC_PDIR1_PDOR2	0x00000002	/* PDIR1 PDOR2 data */
#define	MCFA_DIC_PDIR1_IIS1	0x00000004	/* PDIR1 IIS1 data */
#define	MCFA_DIC_PDIR1_IIS3	0x00000005	/* PDIR1 IIS3 data */
#define	MCFA_DIC_PDIR1_IIS4	0x00000006	/* PDIR1 IIS4 data */
#define	MCFA_DIC_PDIR1_EBU1	0x00000007	/* PDIR1 EBU1 data */
#define	MCFA_DIC_PDIR1_EBU2	0x00001000	/* PDIR1 EBU2 data */


//DMA REGISTER
#define	MCFDMA_DCR0		0x308		/* DMA status reg (r/w) */
#define	MCFDMA_DCR1		0x348		/* DMA status reg (r/w) */
#define	MCFDMA_DSR0		0x310		/* DMA status reg (r/w) */
#define	MCFDMA_DSR1		0x350		/* DMA status reg (r/w) */
#define	MCFDMA_SAR0		0x300		/* DMA status reg (r/w) */
#define	MCFDMA_SAR1		0x340		/* DMA status reg (r/w) */
#define	MCFDMA_DAR0		0x304		/* DMA status reg (r/w) */
#define	MCFDMA_DAR1		0x344		/* DMA status reg (r/w) */
#define	MCFDMA_BCR0		0x30C		/* DMA status reg (r/w) */
#define	MCFDMA_BCR1		0x34C		/* DMA status reg (r/w) */

//#define	DMA0_STATUE(x)		(((*mcfReg8p(MCFDMA_DSR0))<<x)&0x01)
//#define	DMA1_STATUE(x)		(((*mcfReg8p(MCFDMA_DSR1))<<x)&0x01)
#define   DMA0_STATUE			(*mcfReg8p(MCFDMA_DSR0))
#define   DMA1_STATUE			(*mcfReg8p(MCFDMA_DSR1))
#define   DMA0_CTL				(*mcfReg32p(MCFDMA_DCR0))
#define   DMA1_CTL				(*mcfReg32p(MCFDMA_DCR1))
#define   DMA0_SA				(*mcfReg32p(MCFDMA_SAR0))
#define   DMA1_SA				(*mcfReg32p(MCFDMA_SAR1))
#define   DMA0_DA				(*mcfReg32p(MCFDMA_DAR0))
#define   DMA1_DA				(*mcfReg32p(MCFDMA_DAR1))
#define   DMA0_BC				(*mcfReg16p(MCFDMA_BCR0))
#define   DMA1_BC				(*mcfReg16p(MCFDMA_BCR1))

/*
 *	General purpose IO registers (in MBAR2).
 */
#define	MCFSIM2_GPIOREAD	0x0		/* GPIO read values */
#define	MCFSIM2_GPIOWRITE	0x4		/* GPIO write values */
#define	MCFSIM2_GPIOENABLE	0x8		/* GPIO enabled */
#define	MCFSIM2_GPIOFUNC	0xc		/* GPIO function */
#define	MCFSIM2_GPIO1READ	0xb0		/* GPIO1 read values */
#define	MCFSIM2_GPIO1WRITE	0xb4		/* GPIO1 write values */
#define	MCFSIM2_GPIO1ENABLE	0xb8		/* GPIO1 enabled */
#define	MCFSIM2_GPIO1FUNC	0xbc		/* GPIO1 function */

#define	MCF_SDATAI3        0x00000200
#define	MCF_SDATAI4        0x00000400

/****************************************************************************/
// audio device
typedef struct WTAudio_dev{
	int major;
  	//int tx_irq;	    //中断方式的中断号
 	int tx_nBufT;       //当前读写缓冲区位置指示(以包为单位)
 	//int tx_nBufB;	    //当前读写缓冲区位置头指示(以包为单位)
  	int tx_nDmaStart;   //DMA读写缓冲区位置头指示(以包为单位)	
	int tx_nDmaCount;   //DMA需要传送的包个数
	//unsigned long SysDelay;
	unsigned long mmstart; //buffer base addr
	unsigned long mmsize;  //mmsize = packsize*packcount
	unsigned long dmasize; //dma buffer size  dmasize = packsize*dmacount
	unsigned long packsize;	//adpcm:1009  upcm: 508
	unsigned long mmcount;  // mmsize/packsize
	unsigned long dmacount; // dmasize/packsize
}WTAudio_dev;

unsigned char * WTAudio_buf;

WTAudio_dev AudioDev={AUDIOOUTMAJOR,//WTAUDIO_TXIRQ,
			0,0,0,0,BUFSIZE,DMASIZE,ADSAMP_PER_PACK,PACKCOUNT,DMACOUNT
};


#define BUFFERINC(x,y,z)  ((x+y)%z)  //z: num of package  y: inc  x: indicate

typedef struct WTDevBufStatus{
	int tx_nBufT;
	//int tx_nBufB;
	int tx_nDmaStart;
}WTDevBufStatus;




/****************************************************************************/

void WTAudio_chipinit(void)
{
#if DEBUG
    printk("WTAudio_chipinit()\n");
#endif
    //*mcf2Reg32p(MCFA_IIS2CONFIG) = MCFA_IIS_CLK8 | MCFA_IIS_TXSRC_IIS1 |
    //              MCFA_IIS_16BIT | MCFA_IIS_MODE_IIS | MCFA_IIS_LRCK32BIT;
    //*mcf2Reg32p(MCFA_IIS1CONFIG) = MCFA_IIS_CLK8 | MCFA_IIS_TXSRC_PDOR3 |
	//MCFA_IIS_16BIT | MCFA_IIS_MODE_IIS | MCFA_IIS_LRCK32BIT;