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#ifndef ASMARM_PCI_H

#define ASMARM_PCI_H

#ifdef __KERNEL__

#include <linux/mm.h>

#include <asm/arch/hardware.h>

#include <asm/scatterlist.h>

#include <asm/io.h>

/*

 * For SA-1111 these functions are "magic" and utilize bounce

 * buffers as need to workaround SA-1111 DMA bugs.  They are called in

 * place of their pci_* counterparts when dev_is_sa1111() returns true.

 */

dma_addr_t sa1111_map_single(void *, size_t, int);

void sa1111_unmap_single(dma_addr_t, size_t, int);

int sa1111_map_sg(struct scatterlist *, int, int);

void sa1111_unmap_sg(struct scatterlist *, int, int);

void sa1111_dma_sync_single(dma_addr_t, size_t, int);

void sa1111_dma_sync_sg(struct scatterlist *, int, int);

#ifdef CONFIG_SA1111

#define SA1111_FAKE_PCIDEV ((struct pci_dev *) 1111)

static inline int dev_is_sa1111(const struct pci_dev *dev)

{

        return (dev == SA1111_FAKE_PCIDEV);

}

#else

static inline int dev_is_sa1111(const struct pci_dev *dev) { return 0; }

#endif

/*

 * The PCI address space does equal the physical memory address space.

 * The networking and block device layers use this boolean for bounce

 * buffer decisions.

 */

#define PCI_DMA_BUS_IS_PHYS     (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 */

}

#define pcibios_scan_all_fns()          0

struct pci_dev;

/* Allocate and map kernel buffer using consistent mode DMA for a device.

 * hwdev should be valid struct pci_dev pointer for PCI devices,

 * NULL for PCI-like buses (ISA, EISA).

 * Returns non-NULL cpu-view pointer to the buffer if successful and

 * sets *dma_addrp to the pci side dma address as well, else *dma_addrp

 * is undefined.

 */

extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *handle);

/* Free and unmap a consistent DMA buffer.

 * cpu_addr is what was returned from pci_alloc_consistent,

 * size must be the same as what as passed into pci_alloc_consistent,

 * and likewise dma_addr must be the same as what *dma_addrp was set to.

 *

 * References to the memory and mappings associated with cpu_addr/dma_addr

 * past this call are illegal.

 */

static inline void

pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr,

                    dma_addr_t dma_handle)

{

        consistent_free(vaddr, size, dma_handle);

}

/* Map a single buffer of the indicated size for DMA in streaming mode.

 * The 32-bit bus address to use is returned.

 *

 * Once the device is given the dma address, the device owns this memory

 * until either pci_unmap_single or pci_dma_sync_single is performed.

 */

static inline dma_addr_t

pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction)

{

        if (dev_is_sa1111(hwdev))

                return sa1111_map_single(ptr, size, direction);

        consistent_sync(ptr, size, direction);

        return virt_to_bus(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 (dev_is_sa1111(hwdev))

                sa1111_unmap_single(dma_addr, size, direction);

        /* nothing to do */

}

/* Whether pci_unmap_{single,page} is a nop depends upon the

 * configuration.

 */

#ifdef CONFIG_SA1111

#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \

        dma_addr_t ADDR_NAME;

#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \

        __u32 LEN_NAME;

#define pci_unmap_addr(PTR, ADDR_NAME)                  \

        ((PTR)->ADDR_NAME)

#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \

        (((PTR)->ADDR_NAME) = (VAL))

#define pci_unmap_len(PTR, LEN_NAME)                    \

        ((PTR)->LEN_NAME)

#define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \

        (((PTR)->LEN_NAME) = (VAL))

#else /* !(CONFIG_SA1111) */

#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)

#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)

#define pci_unmap_addr(PTR, ADDR_NAME)          (0)

#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)

#define pci_unmap_len(PTR, LEN_NAME)            (0)

#define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)

#endif /* CONFIG_SA1111 */

/* 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)

{

        int i;

        if (dev_is_sa1111(hwdev))

                return sa1111_map_sg(sg, nents, direction);

        for (i = 0; i < nents; i++, sg++) {

                char *vaddr = sg->address;

                if (!vaddr)

                        vaddr = ((char *)page_address(sg->page)) + sg->offset;

                consistent_sync(vaddr, sg->length, direction);

                sg->dma_address = virt_to_bus(vaddr);

        }

        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 (dev_is_sa1111(hwdev)) {

                sa1111_unmap_sg(sg, nents, direction);

                return;

        }

        /* 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 (dev_is_sa1111(hwdev)) {

                sa1111_dma_sync_single(dma_handle, size, direction);

                return;

        }

        consistent_sync(bus_to_virt(dma_handle), size, direction);

}

/* 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)

{

        int i;

        if (dev_is_sa1111(hwdev)) {

                sa1111_dma_sync_sg(sg, nelems, direction);

                return;

        }

        for (i = 0; i < nelems; i++, sg++)

                consistent_sync(sg->address, sg->length, direction);

}

/* Return whether the given PCI device DMA address mask can

 * be supported properly.  For example, if your device can

 * only drive the low 24-bits during PCI bus mastering, then

 * you would pass 0x00ffffff as the mask to this function.

 */

static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)

{

        return 1;

}

/* This isn't fine. */

#define pci_dac_dma_supported(pci_dev, mask)    (0)

/* Return the index of the PCI controller for device PDEV. */

#define pci_controller_num(PDEV)        (0)

#if defined(CONFIG_SA1111) && !defined(CONFIG_PCI)

/* SA-1111 needs these prototypes even when !defined(CONFIG_PCI) */

/* kmem_cache style wrapper around pci_alloc_consistent() */

struct pci_pool *pci_pool_create (const char *name, struct pci_dev *dev,

                size_t size, size_t align, size_t allocation, int flags);

void pci_pool_destroy (struct pci_pool *pool);

void *pci_pool_alloc (struct pci_pool *pool, int flags, dma_addr_t *handle);

void pci_pool_free (struct pci_pool *pool, void *vaddr, dma_addr_t addr);

#endif

#endif /* __KERNEL__ */

#endif