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149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/* Changed from asm-m68k version, Lineo Inc. May 2001 */
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#ifndef _ASM_BFIN_PCI_H
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#define _ASM_BFIN_PCI_H
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#include <asm/scatterlist.h>
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/*
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*
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* Written by Wout Klaren.
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*/
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/* Added by Chang Junxiao */
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#define PCIBIOS_MIN_IO 0x00001000
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#define PCIBIOS_MIN_MEM 0x10000000
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#define PCI_DMA_BUS_IS_PHYS (1)
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struct pci_ops;
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/*
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* Structure with hardware dependent information and functions of the
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* PCI bus.
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*/
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struct pci_bus_info {
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/*
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* Resources of the PCI bus.
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*/
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struct resource mem_space;
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struct resource io_space;
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/*
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* System dependent functions.
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*/
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struct pci_ops *bfin_pci_ops;
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void (*fixup) (int pci_modify);
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void (*conf_device) (unsigned char bus, unsigned char device_fn);
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};
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#define pcibios_assign_all_busses() 0
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static inline void pcibios_set_master(struct pci_dev *dev)
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{
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/* No special bus mastering setup handling */
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}
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static inline void pcibios_penalize_isa_irq(int irq)
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{
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/* We don't do dynamic PCI IRQ allocation */
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}
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static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr,
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size_t size, int direction)
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{
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if (direction == PCI_DMA_NONE)
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BUG();
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/* return virt_to_bus(ptr); */
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return (dma_addr_t) ptr;
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}
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/* Unmap a single streaming mode DMA translation. The dma_addr and size
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* must match what was provided for in a previous pci_map_single call. All
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* other usages are undefined.
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*
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* After this call, reads by the cpu to the buffer are guarenteed to see
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* whatever the device wrote there.
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*/
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static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
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size_t size, int direction)
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{
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if (direction == PCI_DMA_NONE)
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BUG();
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/* Nothing to do */
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}
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/* Map a set of buffers described by scatterlist in streaming
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* mode for DMA. This is the scather-gather version of the
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* above pci_map_single interface. Here the scatter gather list
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* elements are each tagged with the appropriate dma address
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* and length. They are obtained via sg_dma_{address,length}(SG).
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*
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* NOTE: An implementation may be able to use a smaller number of
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* DMA address/length pairs than there are SG table elements.
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* (for example via virtual mapping capabilities)
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* The routine returns the number of addr/length pairs actually
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* used, at most nents.
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*
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* Device ownership issues as mentioned above for pci_map_single are
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* the same here.
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*/
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static inline int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
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int nents, int direction)
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{
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if (direction == PCI_DMA_NONE)
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BUG();
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return nents;
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}
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/* Unmap a set of streaming mode DMA translations.
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* Again, cpu read rules concerning calls here are the same as for
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* pci_unmap_single() above.
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*/
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static inline void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
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int nents, int direction)
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{
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if (direction == PCI_DMA_NONE)
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BUG();
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/* Nothing to do */
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}
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/* Make physical memory consistent for a single
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* streaming mode DMA translation after a transfer.
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*
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* If you perform a pci_map_single() but wish to interrogate the
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* buffer using the cpu, yet do not wish to teardown the PCI dma
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* mapping, you must call this function before doing so. At the
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* next point you give the PCI dma address back to the card, the
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* device again owns the buffer.
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*/
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static inline void pci_dma_sync_single(struct pci_dev *hwdev,
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dma_addr_t dma_handle, size_t size,
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int direction)
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{
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if (direction == PCI_DMA_NONE)
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BUG();
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/* Nothing to do */
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}
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/* Make physical memory consistent for a set of streaming
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* mode DMA translations after a transfer.
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*
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* The same as pci_dma_sync_single but for a scatter-gather list,
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* same rules and usage.
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*/
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static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
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struct scatterlist *sg, int nelems,
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int direction)
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{
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if (direction == PCI_DMA_NONE)
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BUG();
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/* Nothing to do */
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}
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#endif /* _ASM_BFIN_PCI_H */
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