[linux-2.6-block.git] / include / asm-blackfin / pci.h

/* 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 */
Commit	Line	Data
1394f032 BW	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 */