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/* sbus.h: Defines for the Sun SBus.
*
* Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
*/
#ifndef _SPARC64_SBUS_H
#define _SPARC64_SBUS_H
#include <linux/dma-mapping.h>
#include <linux/ioport.h>
#include <linux/of_device.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/iommu.h>
#include <asm/scatterlist.h>
/* We scan which devices are on the SBus using the PROM node device
* tree. SBus devices are described in two different ways. You can
* either get an absolute address at which to access the device, or
* you can get a SBus 'slot' number and an offset within that slot.
*/
/* The base address at which to calculate device OBIO addresses. */
#define SUN_SBUS_BVADDR 0x00000000
#define SBUS_OFF_MASK 0x0fffffff
/* These routines are used to calculate device address from slot
* numbers + offsets, and vice versa.
*/
static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
{
return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
}
static inline int sbus_dev_slot(unsigned long dev_addr)
{
return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
}
struct sbus_bus;
/* Linux SBUS device tables */
struct sbus_dev {
struct of_device ofdev;
struct sbus_bus *bus;
struct sbus_dev *next;
struct sbus_dev *child;
struct sbus_dev *parent;
int prom_node;
char prom_name[64];
int slot;
struct resource resource[PROMREG_MAX];
struct linux_prom_registers reg_addrs[PROMREG_MAX];
int num_registers;
struct linux_prom_ranges device_ranges[PROMREG_MAX];
int num_device_ranges;
unsigned int irqs[4];
int num_irqs;
};
#define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
/* This struct describes the SBus(s) found on this machine. */
struct sbus_bus {
struct of_device ofdev;
struct sbus_dev *devices; /* Tree of SBUS devices */
struct sbus_bus *next; /* Next SBUS in system */
int prom_node; /* OBP node of SBUS */
char prom_name[64]; /* Usually "sbus" or "sbi" */
int clock_freq;
struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
int num_sbus_ranges;
int portid;
};
#define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
extern struct sbus_bus *sbus_root;
/* Device probing routines could find these handy */
#define for_each_sbus(bus) \
for((bus) = sbus_root; (bus); (bus)=(bus)->next)
#define for_each_sbusdev(device, bus) \
for((device) = (bus)->devices; (device); (device)=(device)->next)
#define for_all_sbusdev(device, bus) \
for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
for ((device) = (bus)->devices; (device); (device) = (device)->next)
/* Driver DVMA interfaces. */
#define sbus_can_dma_64bit(sdev) (1)
#define sbus_can_burst64(sdev) (1)
extern void sbus_set_sbus64(struct sbus_dev *, int);
extern void sbus_fill_device_irq(struct sbus_dev *);
static inline void *sbus_alloc_consistent(struct sbus_dev *sdev , size_t size,
dma_addr_t *dma_handle)
{
return dma_alloc_coherent(&sdev->ofdev.dev, size,
dma_handle, GFP_ATOMIC);
}
static inline void sbus_free_consistent(struct sbus_dev *sdev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
return dma_free_coherent(&sdev->ofdev.dev, size, vaddr, dma_handle);
}
#define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
#define SBUS_DMA_TODEVICE DMA_TO_DEVICE
#define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
#define SBUS_DMA_NONE DMA_NONE
/* All the rest use streaming mode mappings. */
static inline dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr,
size_t size, int direction)
{
return dma_map_single(&sdev->ofdev.dev, ptr, size,
(enum dma_data_direction) direction);
}
static inline void sbus_unmap_single(struct sbus_dev *sdev,
dma_addr_t dma_addr, size_t size,
int direction)
{
dma_unmap_single(&sdev->ofdev.dev, dma_addr, size,
(enum dma_data_direction) direction);
}
static inline int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg,
int nents, int direction)
{
return dma_map_sg(&sdev->ofdev.dev, sg, nents,
(enum dma_data_direction) direction);
}
static inline void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg,
int nents, int direction)
{
dma_unmap_sg(&sdev->ofdev.dev, sg, nents,
(enum dma_data_direction) direction);
}
/* Finally, allow explicit synchronization of streamable mappings. */
static inline void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev,
dma_addr_t dma_handle,
size_t size, int direction)
{
dma_sync_single_for_cpu(&sdev->ofdev.dev, dma_handle, size,
(enum dma_data_direction) direction);
}
#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
static inline void sbus_dma_sync_single_for_device(struct sbus_dev *sdev,
dma_addr_t dma_handle,
size_t size, int direction)
{
/* No flushing needed to sync cpu writes to the device. */
}
static inline void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev,
struct scatterlist *sg,
int nents, int direction)
{
dma_sync_sg_for_cpu(&sdev->ofdev.dev, sg, nents,
(enum dma_data_direction) direction);
}
#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
static inline void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev,
struct scatterlist *sg,
int nents, int direction)
{
/* No flushing needed to sync cpu writes to the device. */
}
extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
extern int sbus_arch_preinit(void);
extern void sbus_arch_postinit(void);
#endif /* !(_SPARC64_SBUS_H) */
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