include/asm-powerpc/floppy.h

   1 /*
   2  * Architecture specific parts of the Floppy driver
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 1995
   9  */
  10 #ifndef __ASM_POWERPC_FLOPPY_H
  11 #define __ASM_POWERPC_FLOPPY_H
  12 #ifdef __KERNEL__
  13
  14 #include <linux/config.h>
  15 #include <asm/machdep.h>
  16
  17 #define fd_inb(port)            inb_p(port)
  18 #define fd_outb(value,port)     outb_p(value,port)
  19
  20 #define fd_enable_dma()         enable_dma(FLOPPY_DMA)
  21 #define fd_disable_dma()        disable_dma(FLOPPY_DMA)
  22 #define fd_request_dma()        request_dma(FLOPPY_DMA, "floppy")
  23 #define fd_free_dma()           free_dma(FLOPPY_DMA)
  24 #define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
  25 #define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA, mode)
  26 #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
  27 #define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
  28 #define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
  29 #define fd_cacheflush(addr,size) /* nothing */
  30 #define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
  31                                             SA_INTERRUPT|SA_SAMPLE_RANDOM, \
  32                                             "floppy", NULL)
  33 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
  34
  35 #ifdef CONFIG_PCI
  36
  37 #include <linux/pci.h>
  38
  39 #define fd_dma_setup(addr,size,mode,io) powerpc_fd_dma_setup(addr,size,mode,io)
  40
  41 static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
  42                                            int mode, int io)
  43 {
  44         static unsigned long prev_size;
  45         static dma_addr_t bus_addr = 0;
  46         static char *prev_addr;
  47         static int prev_dir;
  48         int dir;
  49
  50         dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
  51
  52         if (bus_addr
  53             && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
  54                 /* different from last time -- unmap prev */
  55                 pci_unmap_single(NULL, bus_addr, prev_size, prev_dir);
  56                 bus_addr = 0;
  57         }
  58
  59         if (!bus_addr)  /* need to map it */
  60                 bus_addr = pci_map_single(NULL, addr, size, dir);
  61
  62         /* remember this one as prev */
  63         prev_addr = addr;
  64         prev_size = size;
  65         prev_dir = dir;
  66
  67         fd_clear_dma_ff();
  68         fd_cacheflush(addr, size);
  69         fd_set_dma_mode(mode);
  70         set_dma_addr(FLOPPY_DMA, bus_addr);
  71         fd_set_dma_count(size);
  72         virtual_dma_port = io;
  73         fd_enable_dma();
  74
  75         return 0;
  76 }
  77
  78 #endif /* CONFIG_PCI */
  79
  80 __inline__ void virtual_dma_init(void)
  81 {
  82         /* Nothing to do on PowerPC */
  83 }
  84
  85 static int FDC1 = 0x3f0;
  86 static int FDC2 = -1;
  87
  88 /*
  89  * Again, the CMOS information not available
  90  */
  91 #define FLOPPY0_TYPE 6
  92 #define FLOPPY1_TYPE 0
  93
  94 #define N_FDC 2                 /* Don't change this! */
  95 #define N_DRIVE 8
  96
  97 #define FLOPPY_MOTOR_MASK 0xf0
  98
  99 /*
 100  * The PowerPC has no problems with floppy DMA crossing 64k borders.
 101  */
 102 #define CROSS_64KB(a,s) (0)
 103
 104 #define EXTRA_FLOPPY_PARAMS
 105
 106 #endif /* __KERNEL__ */
 107 #endif /* __ASM_POWERPC_FLOPPY_H */