diff options
Diffstat (limited to 'include/asm-alpha/floppy.h')
| -rw-r--r-- | include/asm-alpha/floppy.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/asm-alpha/floppy.h b/include/asm-alpha/floppy.h index a08aa973c..92c213b27 100644 --- a/include/asm-alpha/floppy.h +++ b/include/asm-alpha/floppy.h @@ -31,6 +31,51 @@ "floppy", NULL) #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL); +#ifdef CONFIG_PCI + +#include <linux/pci.h> + +#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io) + +static __inline__ int +alpha_fd_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; + + 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(NULL, bus_addr, prev_size, prev_dir); + bus_addr = 0; + } + + if (!bus_addr) /* need to map it */ + bus_addr = pci_map_single(NULL, 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; +} + +#endif /* CONFIG_PCI */ + __inline__ void virtual_dma_init(void) { /* Nothing to do on an Alpha */ |