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gerrit-public.fairphone.software / kernel / msm-4.19 / 367b09fec4e01571a3aab996be086072cf5517eb / . / include / asm-blackfin / pci.h
blob: 61277358c8655b64817a37c1e22a2f77ebc0114d [file] [log] [blame]
Bryan Wu1394f032007-05-06 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)
18struct pci_ops;
19
20/*
21 * Structure with hardware dependent information and functions of the
22 * PCI bus.
23 */
24struct 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
41static inline void pcibios_set_master(struct pci_dev *dev)
42{
43
44 /* No special bus mastering setup handling */
45}
46static inline void pcibios_penalize_isa_irq(int irq)
47{
48
49 /* We don't do dynamic PCI IRQ allocation */
50}
51static 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 */
68static 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 */
92static 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 */
104static 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 */
122static 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 */
138static 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 */