Linux kernel mirror (for testing)
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linux
1/*
2 * linux/include/amba/bus.h
3 *
4 * This device type deals with ARM PrimeCells and anything else that
5 * presents a proper CID (0xB105F00D) at the end of the I/O register
6 * region or that is derived from a PrimeCell.
7 *
8 * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14#ifndef ASMARM_AMBA_H
15#define ASMARM_AMBA_H
16
17#include <linux/clk.h>
18#include <linux/device.h>
19#include <linux/err.h>
20#include <linux/resource.h>
21#include <linux/regulator/consumer.h>
22
23#define AMBA_NR_IRQS 2
24#define AMBA_CID 0xb105f00d
25
26struct clk;
27
28struct amba_device {
29 struct device dev;
30 struct resource res;
31 struct clk *pclk;
32 struct regulator *vcore;
33 u64 dma_mask;
34 unsigned int periphid;
35 unsigned int irq[AMBA_NR_IRQS];
36};
37
38struct amba_id {
39 unsigned int id;
40 unsigned int mask;
41 void *data;
42};
43
44struct amba_driver {
45 struct device_driver drv;
46 int (*probe)(struct amba_device *, const struct amba_id *);
47 int (*remove)(struct amba_device *);
48 void (*shutdown)(struct amba_device *);
49 int (*suspend)(struct amba_device *, pm_message_t);
50 int (*resume)(struct amba_device *);
51 const struct amba_id *id_table;
52};
53
54enum amba_vendor {
55 AMBA_VENDOR_ARM = 0x41,
56 AMBA_VENDOR_ST = 0x80,
57};
58
59extern struct bus_type amba_bustype;
60
61#define to_amba_device(d) container_of(d, struct amba_device, dev)
62
63#define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
64#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
65
66int amba_driver_register(struct amba_driver *);
67void amba_driver_unregister(struct amba_driver *);
68int amba_device_register(struct amba_device *, struct resource *);
69void amba_device_unregister(struct amba_device *);
70struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);
71int amba_request_regions(struct amba_device *, const char *);
72void amba_release_regions(struct amba_device *);
73
74#define amba_pclk_enable(d) \
75 (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))
76
77#define amba_pclk_disable(d) \
78 do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)
79
80#define amba_vcore_enable(d) \
81 (IS_ERR((d)->vcore) ? 0 : regulator_enable((d)->vcore))
82
83#define amba_vcore_disable(d) \
84 do { if (!IS_ERR((d)->vcore)) regulator_disable((d)->vcore); } while (0)
85
86/* Some drivers don't use the struct amba_device */
87#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
88#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
89#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)
90#define AMBA_PART_BITS(a) ((a) & 0xfff)
91
92#define amba_config(d) AMBA_CONFIG_BITS((d)->periphid)
93#define amba_rev(d) AMBA_REV_BITS((d)->periphid)
94#define amba_manf(d) AMBA_MANF_BITS((d)->periphid)
95#define amba_part(d) AMBA_PART_BITS((d)->periphid)
96
97#endif