/*    Architecture specific parts of the Floppy driver * *    Linux/PA-RISC Project (http://www.parisc-linux.org/) *    Copyright (C) 2000 Matthew Wilcox (willy a debian . org) *    Copyright (C) 2000 Dave Kennedy * *    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */#ifndef __ASM_PARISC_FLOPPY_H#define __ASM_PARISC_FLOPPY_H #include <linux/vmalloc.h>  /* * The DMA channel used by the floppy controller cannot access data at * addresses >= 16MB * * Went back to the 1MB limit, as some people had problems with the floppy * driver otherwise. It doesn't matter much for performance anyway, as most * floppy accesses go through the track buffer. */#define _CROSS_64KB(a,s,vdma) \(!vdma && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)) #define CROSS_64KB(a,s) _CROSS_64KB(a,s,use_virtual_dma & 1)  #define SW fd_routine[use_virtual_dma&1]#define CSW fd_routine[can_use_virtual_dma & 1]  #define fd_inb(port)			readb(port)#define fd_outb(value, port)		writeb(value, port) #define fd_request_dma()        CSW._request_dma(FLOPPY_DMA,"floppy")#define fd_free_dma()           CSW._free_dma(FLOPPY_DMA)#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)#define fd_get_dma_residue()    SW._get_dma_residue(FLOPPY_DMA)#define fd_dma_mem_alloc(size)	SW._dma_mem_alloc(size)#define fd_dma_setup(addr, size, mode, io) SW._dma_setup(addr, size, mode, io) #define FLOPPY_CAN_FALLBACK_ON_NODMA static int virtual_dma_count=0;static int virtual_dma_residue=0;static char *virtual_dma_addr=0;static int virtual_dma_mode=0;static int doing_pdma=0; static void floppy_hardint(int irq, void *dev_id, struct pt_regs * regs){	register unsigned char st; #undef TRACE_FLPY_INT #ifdef TRACE_FLPY_INT	static int calls=0;	static int bytes=0;	static int dma_wait=0;#endif	if (!doing_pdma) {		floppy_interrupt(irq, dev_id, regs);		return;	} #ifdef TRACE_FLPY_INT	if(!calls)		bytes = virtual_dma_count;#endif 	{		register int lcount;		register char *lptr = virtual_dma_addr; 		for (lcount = virtual_dma_count; lcount; lcount--) {			st = fd_inb(virtual_dma_port+4) & 0xa0 ;			if (st != 0xa0) 				break;			if (virtual_dma_mode) {				fd_outb(*lptr, virtual_dma_port+5);			} else {				*lptr = fd_inb(virtual_dma_port+5);			}			lptr++;		}		virtual_dma_count = lcount;		virtual_dma_addr = lptr;		st = fd_inb(virtual_dma_port+4);	} #ifdef TRACE_FLPY_INT	calls++;#endif	if (st == 0x20)		return;	if (!(st & 0x20)) {		virtual_dma_residue += virtual_dma_count;		virtual_dma_count = 0;#ifdef TRACE_FLPY_INT		printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", 		       virtual_dma_count, virtual_dma_residue, calls, bytes,		       dma_wait);		calls = 0;		dma_wait=0;#endif		doing_pdma = 0;		floppy_interrupt(irq, dev_id, regs);		return;	}#ifdef TRACE_FLPY_INT	if (!virtual_dma_count)		dma_wait++;#endif} static void fd_disable_dma(void){	if(! (can_use_virtual_dma & 1))		disable_dma(FLOPPY_DMA);	doing_pdma = 0;	virtual_dma_residue += virtual_dma_count;	virtual_dma_count=0;} static int vdma_request_dma(unsigned int dmanr, const char * device_id){	return 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,SA_INTERRUPT,						   "floppy", NULL);	else		return request_irq(FLOPPY_IRQ, floppy_interrupt,						   SA_INTERRUPT|SA_SAMPLE_RANDOM,						   "floppy", NULL);	 } static unsigned long dma_mem_alloc(unsigned long size){	return __get_dma_pages(GFP_KERNEL, get_order(size));}  static unsigned long vdma_mem_alloc(unsigned long size){	return (unsigned long) vmalloc(size); } #define nodma_mem_alloc(size) vdma_mem_alloc(size) static void _fd_dma_mem_free(unsigned long addr, unsigned long size){	if((unsigned int) addr >= (unsigned int) high_memory)		return vfree((void *)addr);	else		free_pages(addr, get_order(size));		} #define fd_dma_mem_free(addr, size)  _fd_dma_mem_free(addr, size)  static void _fd_chose_dma_mode(char *addr, unsigned long size){	if(can_use_virtual_dma == 2) {		if((unsigned int) addr >= (unsigned int) high_memory ||		   virt_to_bus(addr) >= 0x1000000 ||		   _CROSS_64KB(addr, size, 0))			use_virtual_dma = 1;		else			use_virtual_dma = 0;	} else {		use_virtual_dma = can_use_virtual_dma & 1;	}} #define fd_chose_dma_mode(addr, size) _fd_chose_dma_mode(addr, size)  static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io){	doing_pdma = 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){#ifdef FLOPPY_SANITY_CHECK	if (CROSS_64KB(addr, size)) {		printk("DMA crossing 64-K boundary %p-%p\n", addr, addr+size);		return -1;	}#endif	/* actual, physical DMA */	doing_pdma = 0;	clear_dma_ff(FLOPPY_DMA);	set_dma_mode(FLOPPY_DMA,mode);	set_dma_addr(FLOPPY_DMA,virt_to_bus(addr));	set_dma_count(FLOPPY_DMA,size);	enable_dma(FLOPPY_DMA);	return 0;} static struct fd_routine_l {	int (*_request_dma)(unsigned int dmanr, const char * device_id);	void (*_free_dma)(unsigned int dmanr);	int (*_get_dma_residue)(unsigned int dummy);	unsigned long (*_dma_mem_alloc) (unsigned long size);	int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);} fd_routine[] = {	{		request_dma,		free_dma,		get_dma_residue,		dma_mem_alloc,		hard_dma_setup	},	{		vdma_request_dma,		vdma_nop,		vdma_get_dma_residue,		vdma_mem_alloc,		vdma_dma_setup	}};  static int FDC1 = 0x3f0; /* Lies.  Floppy controller is memory mapped, not io mapped */static int FDC2 = -1; #define FLOPPY0_TYPE	0#define FLOPPY1_TYPE	0 #define N_FDC 1#define N_DRIVE 8 #define FLOPPY_MOTOR_MASK 0xf0 #define AUTO_DMA #define EXTRA_FLOPPY_PARAMS #endif /* __ASM_PARISC_FLOPPY_H */