summaryrefslogtreecommitdiff
path: root/include/asm-x86/floppy.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/floppy.h')
-rw-r--r--include/asm-x86/floppy.h281
1 files changed, 0 insertions, 281 deletions
diff --git a/include/asm-x86/floppy.h b/include/asm-x86/floppy.h
deleted file mode 100644
index 7d83a3a..0000000
--- a/include/asm-x86/floppy.h
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * 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
- */
-#ifndef ASM_X86__FLOPPY_H
-#define ASM_X86__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) inb_p(port)
-#define fd_outb(value, port) outb_p(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;
-static int virtual_dma_residue;
-static char *virtual_dma_addr;
-static int virtual_dma_mode;
-static int doing_pdma;
-
-static irqreturn_t floppy_hardint(int irq, void *dev_id)
-{
- unsigned char st;
-
-#undef TRACE_FLPY_INT
-
-#ifdef TRACE_FLPY_INT
- static int calls;
- static int bytes;
- static int dma_wait;
-#endif
- if (!doing_pdma)
- return floppy_interrupt(irq, dev_id);
-
-#ifdef TRACE_FLPY_INT
- if (!calls)
- bytes = virtual_dma_count;
-#endif
-
- {
- int lcount;
- char *lptr;
-
- 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);
- }
-
-#ifdef TRACE_FLPY_INT
- calls++;
-#endif
- if (st == 0x20)
- return IRQ_HANDLED;
- 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);
- return IRQ_HANDLED;
- }
-#ifdef TRACE_FLPY_INT
- if (!virtual_dma_count)
- dma_wait++;
-#endif
- return IRQ_HANDLED;
-}
-
-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,
- IRQF_DISABLED, "floppy", NULL);
- else
- return request_irq(FLOPPY_IRQ, floppy_interrupt,
- IRQF_DISABLED, "floppy", NULL);
-}
-
-static unsigned long dma_mem_alloc(unsigned long size)
-{
- return __get_dma_pages(GFP_KERNEL|__GFP_NORETRY, 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 long)addr >= (unsigned long)high_memory)
- 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 long)addr >= (unsigned long)high_memory ||
- isa_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, isa_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;
-static int FDC2 = -1;
-
-/*
- * Floppy types are stored in the rtc's CMOS RAM and so rtc_lock
- * is needed to prevent corrupted CMOS RAM in case "insmod floppy"
- * coincides with another rtc CMOS user. Paul G.
- */
-#define FLOPPY0_TYPE \
-({ \
- unsigned long flags; \
- unsigned char val; \
- spin_lock_irqsave(&rtc_lock, flags); \
- val = (CMOS_READ(0x10) >> 4) & 15; \
- spin_unlock_irqrestore(&rtc_lock, flags); \
- val; \
-})
-
-#define FLOPPY1_TYPE \
-({ \
- unsigned long flags; \
- unsigned char val; \
- spin_lock_irqsave(&rtc_lock, flags); \
- val = CMOS_READ(0x10) & 15; \
- spin_unlock_irqrestore(&rtc_lock, flags); \
- val; \
-})
-
-#define N_FDC 2
-#define N_DRIVE 8
-
-#define EXTRA_FLOPPY_PARAMS
-
-#endif /* ASM_X86__FLOPPY_H */