Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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
22#define AMBA_NR_IRQS 2
23#define AMBA_CID 0xb105f00d
24
25struct clk;
26
27struct amba_device {
28 struct device dev;
29 struct resource res;
30 struct clk *pclk;
31 u64 dma_mask;
32 unsigned int periphid;
33 unsigned int irq[AMBA_NR_IRQS];
34};
35
36struct amba_id {
37 unsigned int id;
38 unsigned int mask;
39 void *data;
40};
41
42struct amba_driver {
43 struct device_driver drv;
44 int (*probe)(struct amba_device *, struct amba_id *);
45 int (*remove)(struct amba_device *);
46 void (*shutdown)(struct amba_device *);
47 int (*suspend)(struct amba_device *, pm_message_t);
48 int (*resume)(struct amba_device *);
49 struct amba_id *id_table;
50};
51
52enum amba_vendor {
53 AMBA_VENDOR_ARM = 0x41,
54 AMBA_VENDOR_ST = 0x80,
55};
56
57#define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
58#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
59
60int amba_driver_register(struct amba_driver *);
61void amba_driver_unregister(struct amba_driver *);
62int amba_device_register(struct amba_device *, struct resource *);
63void amba_device_unregister(struct amba_device *);
64struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);
65int amba_request_regions(struct amba_device *, const char *);
66void amba_release_regions(struct amba_device *);
67
68#define amba_pclk_enable(d) \
69 (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))
70
71#define amba_pclk_disable(d) \
72 do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)
73
74/* Some drivers don't use the struct amba_device */
75#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
76#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
77#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)
78#define AMBA_PART_BITS(a) ((a) & 0xfff)
79
80#define amba_config(d) AMBA_CONFIG_BITS((d)->periphid)
81#define amba_rev(d) AMBA_REV_BITS((d)->periphid)
82#define amba_manf(d) AMBA_MANF_BITS((d)->periphid)
83#define amba_part(d) AMBA_PART_BITS((d)->periphid)
84
85#endif