isa_dma.c

飞利浦公司usb2.0芯片isp1581的通用驱动代码

/*
   //*************************************************************************
   //
   //                  P H I L I P S   P R O P R I E T A R Y
   //
   //           COPYRIGHT (c)   2000 BY PHILIPS SINGAPORE.
   //                     --  ALL RIGHTS RESERVED  --
   //
   // Project:		ISP1581 EVA board
   // File Name:	ISA_DMA.C
   // Author:		Qian Jiang
   // Created:		Sept. 1, 2000
   // Modified:
   // Revision:		0.0
   //
   //
   // This file contents the configuration of DMA controller, which locates on
   // PC side;
   //
   //*************************************************************************
*/

#include <stdio.h>

#include <bios.h>
#include <dos.h>
#include <mem.h>

#include "chap_9.h"
#include "BasicTyp.h"
#include "common.h"
#include "ISP1581.H"
#include "mainloop.h"
#include "verify.h"

#define	DMA37MD_SINGLE	0x40	/* single pass mode */
#define	DMA37MD_BLOCK	0x80	/* single pass mode */
#define	DMA37MD_AUTO	0x10	/* autoinitialise single pass mode */
#define	DMA37MD_DEMAND	0x00	/* demand mode */
#define	DMA37MD_WRITE	0x04	/* read the device, write memory operation */
#define	DMA37MD_READ	0x08	/* write the device, read memory operation */

/*
**  Register definitions for DMA controller 1 (channels 0..3):
*/
#define	DMA1_CHN(c)	(2*(c))	/* addr reg for channel c */
#define DMA1_CMD    (8)     /* command register */
#define	DMA1_SMSK	(10)	/* single mask register */
//#define	DMA1_MODE	(11)	/* mode register */
#define	DMA1_MODE	(0xd6)	/* mode register */
#define	DMA1_FFC	(12)	/* clear first/last FF */

extern ISP1581FLAGS bISP1581flags;
extern unsigned long dmaBuffer;
extern IO_REQUEST idata ioRequest;
extern GLOBE_VARIABLE globe_variable;

void dma_start(PIO_REQUEST pio)
{
//	static short pageport[8] = { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a };
	unsigned short dmaport, l;
	unsigned long offset, buf_phy_addr;
	unsigned char i, ch;

	outportb(DMA1_CMD, 0x0); // clear DMA first

	offset = (((unsigned long)pio->bAddressH)<<16)
		+ pio->uAddressL;

	buf_phy_addr = dmaBuffer + offset;

	ch = 0x03; // for channel 7 or 3, depends on mode register address;

//DMA ch7	if ((ch & 4) == 0) {
// Disable DMA before configurate it
//	outportb(DMA1_CMD, 0x04);
		outportb(0xde,0x08);
		inportb(0xd0);
		if (globe_variable.xfer_dir)
		{
#ifdef dma_on_local
#ifdef debug
//			cprintf(" dma_on_local program_ISA ");
#endif
			outportb(DMA1_MODE, DMA37MD_DEMAND|DMA37MD_WRITE|ch);
#else
	#ifdef debug
		cprintf(" dma_on_isa ");
	#endif
		outportb(DMA1_MODE, DMA37MD_DEMAND|DMA37MD_READ|ch);
//			outportb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|ch);
#endif
		}
		else
		{
			outportb(DMA1_MODE, DMA37MD_DEMAND|DMA37MD_WRITE|ch);
//			outportb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|ch);
		}
//		outportb(DMA1_FFC, 0);
		/* send start address */

//		dmaport =  DMA1_CHN(ch);
//		outportb(dmaport, buf_phy_addr);
//		outportb(dmaport, buf_phy_addr>>8);
//		outportb(pageport[ch], buf_phy_addr>>16);
		outportb(0xd8, 0x00);
		outportb(0xcc, buf_phy_addr>>1);
		outportb(0xcc, buf_phy_addr>>9);
		outportb(0x8a, buf_phy_addr>>16);

		/* send count */
//		outportb(DMA1_FFC, 0);
//		outportb(dmaport + 1, --nbytes);
//		outportb(dmaport + 1, nbytes>>8);
		outportb(0xce, (unsigned char)globe_variable.isa_dma_counterset);
		outportb(0xce, (unsigned char)(globe_variable.isa_dma_counterset>>8));

//		outportb(DMA1_CMD, 0x0);

		/* unmask channel */
//		outportb(DMA1_SMSK, ch);
		outportb(0xd4, 0x03);

//	}
//Print counter value
//	l = dma_getcount(3);
#ifdef debug
//	cprintf("DMA count from %lx \r\n", l);
#endif
//	i = inportb(DMA1_CMD);
}

int dma_getcount(int ch)
{
	unsigned short dmaport;
	unsigned short highbyte, lowbyte;

	dmaport =  DMA1_CHN(ch);
	outportb(DMA1_FFC, 0);

	lowbyte = inportb(dmaport + 1);
	highbyte = inportb(dmaport + 1);
	highbyte <<= 8;
	highbyte += lowbyte;

	return highbyte;
}