--- /dev/null
+/*
+ * 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_POWERPC_FLOPPY_H
+#define __ASM_POWERPC_FLOPPY_H
+#ifdef __KERNEL__
+
+#include <asm/machdep.h>
+
+#define fd_inb(port) inb_p(port)
+#define fd_outb(value,port) outb_p(value,port)
+
+#define fd_enable_dma() enable_dma(FLOPPY_DMA)
+#define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA)
+#define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA)
+#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
+#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA, mode)
+#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
+#define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA)
+#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
+#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
+#define fd_cacheflush(addr,size) /* nothing */
+#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
+
+#include <linux/pci.h>
+#include <asm/ppc-pci.h> /* for isa_bridge_pcidev */
+
+#define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io)
+
+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,
+ 0, "floppy", NULL);
+ else
+ return request_irq(FLOPPY_IRQ, floppy_interrupt,
+ 0, "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)
+{
+ static unsigned long prev_size;
+ static dma_addr_t bus_addr = 0;
+ static char *prev_addr;
+ static int prev_dir;
+ int dir;
+
+ doing_vdma = 0;
+ dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
+
+ if (bus_addr
+ && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
+ /* different from last time -- unmap prev */
+ pci_unmap_single(isa_bridge_pcidev, bus_addr, prev_size, prev_dir);
+ bus_addr = 0;
+ }
+
+ if (!bus_addr) /* need to map it */
+ bus_addr = pci_map_single(isa_bridge_pcidev, addr, size, dir);
+
+ /* remember this one as prev */
+ prev_addr = addr;
+ prev_size = size;
+ prev_dir = dir;
+
+ fd_clear_dma_ff();
+ fd_cacheflush(addr, size);
+ fd_set_dma_mode(mode);
+ set_dma_addr(FLOPPY_DMA, bus_addr);
+ fd_set_dma_count(size);
+ virtual_dma_port = io;
+ fd_enable_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(void)
+{
+ 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
+
+/*
+ * The PowerPC has no problems with floppy DMA crossing 64k borders.
+ */
+#define CROSS_64KB(a,s) (0)
+
+#define EXTRA_FLOPPY_PARAMS
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_POWERPC_FLOPPY_H */
Code Review / kvmfornfv.git / blobdiff