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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/linux/amba/bus.h
10817 views
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/*

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 *  linux/include/amba/bus.h

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 *

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 *  This device type deals with ARM PrimeCells and anything else that

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 *  presents a proper CID (0xB105F00D) at the end of the I/O register

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 *  region or that is derived from a PrimeCell.

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 *

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 *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 */

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#ifndef ASMARM_AMBA_H

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#define ASMARM_AMBA_H

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#include <linux/clk.h>

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#include <linux/device.h>

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#include <linux/err.h>

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#include <linux/resource.h>

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#include <linux/regulator/consumer.h>

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#define AMBA_NR_IRQS	2

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#define AMBA_CID	0xb105f00d

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struct clk;

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struct amba_device {

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	struct device		dev;

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	struct resource		res;

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	struct clk		*pclk;

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	struct regulator	*vcore;

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	u64			dma_mask;

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	unsigned int		periphid;

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	unsigned int		irq[AMBA_NR_IRQS];

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};

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struct amba_id {

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	unsigned int		id;

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	unsigned int		mask;

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	void			*data;

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};

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struct amba_driver {

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	struct device_driver	drv;

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	int			(*probe)(struct amba_device *, const struct amba_id *);

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	int			(*remove)(struct amba_device *);

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	void			(*shutdown)(struct amba_device *);

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	int			(*suspend)(struct amba_device *, pm_message_t);

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	int			(*resume)(struct amba_device *);

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	const struct amba_id	*id_table;

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};

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enum amba_vendor {

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	AMBA_VENDOR_ARM = 0x41,

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	AMBA_VENDOR_ST = 0x80,

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};

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extern struct bus_type amba_bustype;

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#define to_amba_device(d)	container_of(d, struct amba_device, dev)

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#define amba_get_drvdata(d)	dev_get_drvdata(&d->dev)

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#define amba_set_drvdata(d,p)	dev_set_drvdata(&d->dev, p)

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int amba_driver_register(struct amba_driver *);

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void amba_driver_unregister(struct amba_driver *);

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int amba_device_register(struct amba_device *, struct resource *);

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void amba_device_unregister(struct amba_device *);

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struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);

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int amba_request_regions(struct amba_device *, const char *);

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void amba_release_regions(struct amba_device *);

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#define amba_pclk_enable(d)	\

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	(IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))

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#define amba_pclk_disable(d)	\

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	do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)

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#define amba_vcore_enable(d)	\

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	(IS_ERR((d)->vcore) ? 0 : regulator_enable((d)->vcore))

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#define amba_vcore_disable(d)	\

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	do { if (!IS_ERR((d)->vcore)) regulator_disable((d)->vcore); } while (0)

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/* Some drivers don't use the struct amba_device */

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#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)

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#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)

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#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)

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#define AMBA_PART_BITS(a) ((a) & 0xfff)

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#define amba_config(d)	AMBA_CONFIG_BITS((d)->periphid)

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#define amba_rev(d)	AMBA_REV_BITS((d)->periphid)

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#define amba_manf(d)	AMBA_MANF_BITS((d)->periphid)

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#define amba_part(d)	AMBA_PART_BITS((d)->periphid)

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#endif

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