/* * Architecture specific parts of the Floppy driver * * This file is subject to the terms and conditions of the GNU General Public * License.  See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1995 */#ifdef __KERNEL__#ifndef __ASM_PPC_FLOPPY_H#define __ASM_PPC_FLOPPY_H #define fd_inb(port)		inb_p(port)#define fd_outb(value,port)	outb_p(value,port) #define fd_disable_dma()	fd_ops->_disable_dma(FLOPPY_DMA)#define fd_free_dma()           fd_ops->_free_dma(FLOPPY_DMA)#define fd_get_dma_residue()    fd_ops->_get_dma_residue(FLOPPY_DMA)#define fd_dma_setup(addr, size, mode, io) fd_ops->_dma_setup(addr, size, mode, io)#define fd_enable_irq()         enable_irq(FLOPPY_IRQ)#define fd_disable_irq()        disable_irq(FLOPPY_IRQ)#define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL); static int fd_request_dma(void); struct fd_dma_ops {	void (*_disable_dma)(unsigned int dmanr);	void (*_free_dma)(unsigned int dmanr);	int (*_get_dma_residue)(unsigned int dummy);	int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);}; static int virtual_dma_count;static int virtual_dma_residue;static char *virtual_dma_addr;static int virtual_dma_mode;static int doing_vdma;static struct fd_dma_ops *fd_ops; static irqreturn_t floppy_hardint(int irq, void *dev_id){	unsigned char st;	int lcount;	char *lptr; 	if (!doing_vdma)		return floppy_interrupt(irq, dev_id);  	st = 1;	for (lcount=virtual_dma_count, lptr=virtual_dma_addr;	     lcount; lcount--, lptr++) {		st=inb(virtual_dma_port+4) & 0xa0 ;		if (st != 0xa0)			break;		if (virtual_dma_mode)			outb_p(*lptr, virtual_dma_port+5);		else			*lptr = inb_p(virtual_dma_port+5);	}	virtual_dma_count = lcount;	virtual_dma_addr = lptr;	st = inb(virtual_dma_port+4); 	if (st == 0x20)		return IRQ_HANDLED;	if (!(st & 0x20)) {		virtual_dma_residue += virtual_dma_count;		virtual_dma_count=0;		doing_vdma = 0;		floppy_interrupt(irq, dev_id);		return IRQ_HANDLED;	}	return IRQ_HANDLED;} static void vdma_disable_dma(unsigned int dummy){	doing_vdma = 0;	virtual_dma_residue += virtual_dma_count;	virtual_dma_count=0;} static void vdma_nop(unsigned int dummy){}  static int vdma_get_dma_residue(unsigned int dummy){	return virtual_dma_count + virtual_dma_residue;}  static int fd_request_irq(void){	if (can_use_virtual_dma)		return request_irq(FLOPPY_IRQ, floppy_hardint,				   IRQF_DISABLED, "floppy", NULL);	else		return request_irq(FLOPPY_IRQ, floppy_interrupt,				   IRQF_DISABLED, "floppy", NULL);} static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io){	doing_vdma = 1;	virtual_dma_port = io;	virtual_dma_mode = (mode  == DMA_MODE_WRITE);	virtual_dma_addr = addr;	virtual_dma_count = size;	virtual_dma_residue = 0;	return 0;} static int hard_dma_setup(char *addr, unsigned long size, int mode, int io){	/* actual, physical DMA */	doing_vdma = 0;	clear_dma_ff(FLOPPY_DMA);	set_dma_mode(FLOPPY_DMA,mode);	set_dma_addr(FLOPPY_DMA,(unsigned int)virt_to_bus(addr));	set_dma_count(FLOPPY_DMA,size);	enable_dma(FLOPPY_DMA);	return 0;} static struct fd_dma_ops real_dma_ops ={	._disable_dma = disable_dma,	._free_dma = free_dma,	._get_dma_residue = get_dma_residue,	._dma_setup = hard_dma_setup}; static struct fd_dma_ops virt_dma_ops ={	._disable_dma = vdma_disable_dma,	._free_dma = vdma_nop,	._get_dma_residue = vdma_get_dma_residue,	._dma_setup = vdma_dma_setup}; static int fd_request_dma(){	if (can_use_virtual_dma & 1) {		fd_ops = &virt_dma_ops;		return 0;	}	else {		fd_ops = &real_dma_ops;		return request_dma(FLOPPY_DMA, "floppy");	}} static int FDC1 = 0x3f0;static int FDC2 = -1; /* * Again, the CMOS information not available */#define FLOPPY0_TYPE 6#define FLOPPY1_TYPE 0 #define N_FDC 2			/* Don't change this! */#define N_DRIVE 8 #define FLOPPY_MOTOR_MASK 0xf0 /* * The PowerPC has no problems with floppy DMA crossing 64k borders. */#define CROSS_64KB(a,s)	(0) #endif /* __ASM_PPC_FLOPPY_H */ #define EXTRA_FLOPPY_PARAMS #endif /* __KERNEL__ */