154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*
|
|
* linux/include/amba/bus.h
|
|
*
|
|
* This device type deals with ARM PrimeCells and anything else that
|
|
* presents a proper CID (0xB105F00D) at the end of the I/O register
|
|
* region or that is derived from a PrimeCell.
|
|
*
|
|
* Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef ASMARM_AMBA_H
|
|
#define ASMARM_AMBA_H
|
|
|
|
#include <linux/clk.h>
|
|
#include <driver.h>
|
|
#include <linux/err.h>
|
|
|
|
#define AMBA_CID 0xb105f00d
|
|
|
|
/**
|
|
* struct amba_id - identifies a device on an AMBA bus
|
|
* @id: The significant bits if the hardware device ID
|
|
* @mask: Bitmask specifying which bits of the id field are significant when
|
|
* matching. A driver binds to a device when ((hardware device ID) & mask)
|
|
* == id.
|
|
* @data: Private data used by the driver.
|
|
*/
|
|
struct amba_id {
|
|
unsigned int id;
|
|
unsigned int mask;
|
|
void *data;
|
|
};
|
|
|
|
struct clk;
|
|
|
|
struct amba_device {
|
|
struct device_d dev;
|
|
struct resource res;
|
|
void __iomem *base;
|
|
struct clk *pclk;
|
|
unsigned int periphid;
|
|
};
|
|
|
|
struct amba_driver {
|
|
struct driver_d drv;
|
|
int (*probe)(struct amba_device *, const struct amba_id *);
|
|
int (*remove)(struct amba_device *);
|
|
const struct amba_id *id_table;
|
|
};
|
|
|
|
enum amba_vendor {
|
|
AMBA_VENDOR_ARM = 0x41,
|
|
AMBA_VENDOR_ST = 0x80,
|
|
};
|
|
|
|
extern struct bus_type amba_bustype;
|
|
|
|
#define to_amba_device(d) container_of(d, struct amba_device, dev)
|
|
|
|
#define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
|
|
#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
|
|
|
|
int amba_driver_register(struct amba_driver *);
|
|
void amba_driver_unregister(struct amba_driver *);
|
|
struct amba_device *amba_device_alloc(const char *, int id, resource_size_t, size_t);
|
|
void amba_device_put(struct amba_device *);
|
|
int amba_device_add(struct amba_device *);
|
|
int amba_device_register(struct amba_device *, struct resource *);
|
|
|
|
struct amba_device *
|
|
amba_aphb_device_add(struct device_d *parent, const char *name, int id,
|
|
resource_size_t base, size_t size,
|
|
void *pdata, unsigned int periphid);
|
|
|
|
static inline struct amba_device *
|
|
amba_apb_device_add(struct device_d *parent, const char *name, int id,
|
|
resource_size_t base, size_t size,
|
|
void *pdata, unsigned int periphid)
|
|
{
|
|
return amba_aphb_device_add(parent, name, id, base, size, pdata,
|
|
periphid);
|
|
}
|
|
|
|
static inline struct amba_device *
|
|
amba_ahb_device_add(struct device_d *parent, const char *name, int id,
|
|
resource_size_t base, size_t size,
|
|
void *pdata, unsigned int periphid)
|
|
{
|
|
return amba_aphb_device_add(parent, name, id, base, size, pdata,
|
|
periphid);
|
|
}
|
|
|
|
|
|
void amba_device_unregister(struct amba_device *);
|
|
struct amba_device *amba_find_device(const char *, struct device_d *, unsigned int, unsigned int);
|
|
int amba_request_regions(struct amba_device *, const char *);
|
|
void amba_release_regions(struct amba_device *);
|
|
|
|
static inline void __iomem *amba_get_mem_region(struct amba_device *dev)
|
|
{
|
|
return dev->base;
|
|
}
|
|
|
|
#define amba_pclk_enable(d) \
|
|
(IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))
|
|
|
|
#define amba_pclk_disable(d) \
|
|
do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)
|
|
|
|
/* Some drivers don't use the struct amba_device */
|
|
#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
|
|
#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
|
|
#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)
|
|
#define AMBA_PART_BITS(a) ((a) & 0xfff)
|
|
|
|
#define amba_config(d) AMBA_CONFIG_BITS((d)->periphid)
|
|
#define amba_rev(d) AMBA_REV_BITS((d)->periphid)
|
|
#define amba_manf(d) AMBA_MANF_BITS((d)->periphid)
|
|
#define amba_part(d) AMBA_PART_BITS((d)->periphid)
|
|
|
|
#define __AMBA_DEV(busid, data) \
|
|
{ \
|
|
.init_name = busid, \
|
|
.platform_data = data, \
|
|
}
|
|
|
|
/*
|
|
* APB devices do not themselves have the ability to address memory,
|
|
* so DMA masks should be zero (much like USB peripheral devices.)
|
|
* The DMA controller DMA masks should be used instead (much like
|
|
* USB host controllers in conventional PCs.)
|
|
*/
|
|
#define AMBA_APB_DEVICE(name, busid, id, base, data) \
|
|
struct amba_device name##_device = { \
|
|
.dev = __AMBA_DEV(busid, data), \
|
|
.res = DEFINE_RES_MEM(base, SZ_4K), \
|
|
.periphid = id, \
|
|
}
|
|
|
|
/*
|
|
* AHB devices are DMA capable, so set their DMA masks
|
|
*/
|
|
#define AMBA_AHB_DEVICE(name, busid, id, base, data) \
|
|
struct amba_device name##_device = { \
|
|
.dev = __AMBA_DEV(busid, data), \
|
|
.res = DEFINE_RES_MEM(base, SZ_4K), \
|
|
.periphid = id, \
|
|
}
|
|
|
|
#endif
|