| Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 1 | /* Changed from asm-m68k version, Lineo Inc. May 2001 */ |
| 2 | |
| 3 | #ifndef _ASM_BFIN_PCI_H |
| 4 | #define _ASM_BFIN_PCI_H |
| 5 | |
| 6 | #include <asm/scatterlist.h> |
| 7 | |
| 8 | /* |
| 9 | * |
| 10 | * Written by Wout Klaren. |
| 11 | */ |
| 12 | |
| 13 | /* Added by Chang Junxiao */ |
| 14 | #define PCIBIOS_MIN_IO 0x00001000 |
| 15 | #define PCIBIOS_MIN_MEM 0x10000000 |
| 16 | |
| 17 | #define PCI_DMA_BUS_IS_PHYS (1) |
| 18 | struct pci_ops; |
| 19 | |
| 20 | /* |
| 21 | * Structure with hardware dependent information and functions of the |
| 22 | * PCI bus. |
| 23 | */ |
| 24 | struct pci_bus_info { |
| 25 | |
| 26 | /* |
| 27 | * Resources of the PCI bus. |
| 28 | */ |
| 29 | struct resource mem_space; |
| 30 | struct resource io_space; |
| 31 | |
| 32 | /* |
| 33 | * System dependent functions. |
| 34 | */ |
| 35 | struct pci_ops *bfin_pci_ops; |
| 36 | void (*fixup) (int pci_modify); |
| 37 | void (*conf_device) (unsigned char bus, unsigned char device_fn); |
| 38 | }; |
| 39 | |
| 40 | #define pcibios_assign_all_busses() 0 |
| 41 | static inline void pcibios_set_master(struct pci_dev *dev) |
| 42 | { |
| 43 | |
| 44 | /* No special bus mastering setup handling */ |
| 45 | } |
| 46 | static inline void pcibios_penalize_isa_irq(int irq) |
| 47 | { |
| 48 | |
| 49 | /* We don't do dynamic PCI IRQ allocation */ |
| 50 | } |
| 51 | static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, |
| 52 | size_t size, int direction) |
| 53 | { |
| 54 | if (direction == PCI_DMA_NONE) |
| 55 | BUG(); |
| 56 | |
| 57 | /* return virt_to_bus(ptr); */ |
| 58 | return (dma_addr_t) ptr; |
| 59 | } |
| 60 | |
| 61 | /* Unmap a single streaming mode DMA translation. The dma_addr and size |
| 62 | * must match what was provided for in a previous pci_map_single call. All |
| 63 | * other usages are undefined. |
| 64 | * |
| 65 | * After this call, reads by the cpu to the buffer are guarenteed to see |
| 66 | * whatever the device wrote there. |
| 67 | */ |
| 68 | static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, |
| 69 | size_t size, int direction) |
| 70 | { |
| 71 | if (direction == PCI_DMA_NONE) |
| 72 | BUG(); |
| 73 | |
| 74 | /* Nothing to do */ |
| 75 | } |
| 76 | |
| 77 | /* Map a set of buffers described by scatterlist in streaming |
| 78 | * mode for DMA. This is the scather-gather version of the |
| 79 | * above pci_map_single interface. Here the scatter gather list |
| 80 | * elements are each tagged with the appropriate dma address |
| 81 | * and length. They are obtained via sg_dma_{address,length}(SG). |
| 82 | * |
| 83 | * NOTE: An implementation may be able to use a smaller number of |
| 84 | * DMA address/length pairs than there are SG table elements. |
| 85 | * (for example via virtual mapping capabilities) |
| 86 | * The routine returns the number of addr/length pairs actually |
| 87 | * used, at most nents. |
| 88 | * |
| 89 | * Device ownership issues as mentioned above for pci_map_single are |
| 90 | * the same here. |
| 91 | */ |
| 92 | static inline int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, |
| 93 | int nents, int direction) |
| 94 | { |
| 95 | if (direction == PCI_DMA_NONE) |
| 96 | BUG(); |
| 97 | return nents; |
| 98 | } |
| 99 | |
| 100 | /* Unmap a set of streaming mode DMA translations. |
| 101 | * Again, cpu read rules concerning calls here are the same as for |
| 102 | * pci_unmap_single() above. |
| 103 | */ |
| 104 | static inline void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, |
| 105 | int nents, int direction) |
| 106 | { |
| 107 | if (direction == PCI_DMA_NONE) |
| 108 | BUG(); |
| 109 | |
| 110 | /* Nothing to do */ |
| 111 | } |
| 112 | |
| 113 | /* Make physical memory consistent for a single |
| 114 | * streaming mode DMA translation after a transfer. |
| 115 | * |
| 116 | * If you perform a pci_map_single() but wish to interrogate the |
| 117 | * buffer using the cpu, yet do not wish to teardown the PCI dma |
| 118 | * mapping, you must call this function before doing so. At the |
| 119 | * next point you give the PCI dma address back to the card, the |
| 120 | * device again owns the buffer. |
| 121 | */ |
| 122 | static inline void pci_dma_sync_single(struct pci_dev *hwdev, |
| 123 | dma_addr_t dma_handle, size_t size, |
| 124 | int direction) |
| 125 | { |
| 126 | if (direction == PCI_DMA_NONE) |
| 127 | BUG(); |
| 128 | |
| 129 | /* Nothing to do */ |
| 130 | } |
| 131 | |
| 132 | /* Make physical memory consistent for a set of streaming |
| 133 | * mode DMA translations after a transfer. |
| 134 | * |
| 135 | * The same as pci_dma_sync_single but for a scatter-gather list, |
| 136 | * same rules and usage. |
| 137 | */ |
| 138 | static inline void pci_dma_sync_sg(struct pci_dev *hwdev, |
| 139 | struct scatterlist *sg, int nelems, |
| 140 | int direction) |
| 141 | { |
| 142 | if (direction == PCI_DMA_NONE) |
| 143 | BUG(); |
| 144 | |
| 145 | /* Nothing to do */ |
| 146 | } |
| 147 | |
| 148 | #endif /* _ASM_BFIN_PCI_H */ |