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