[deliverable/linux.git] / include / linux / amba / bus.h

/*
 *  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 <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/err.h>
#include <linux/resource.h>
#include <linux/regulator/consumer.h>

#define AMBA_NR_IRQS	2
#define AMBA_CID	0xb105f00d

struct clk;

struct amba_device {
	struct device		dev;
	struct resource		res;
	struct clk		*pclk;
	u64			dma_mask;
	unsigned int		periphid;
	unsigned int		irq[AMBA_NR_IRQS];
};

struct amba_driver {
	struct device_driver	drv;
	int			(*probe)(struct amba_device *, const struct amba_id *);
	int			(*remove)(struct amba_device *);
	void			(*shutdown)(struct amba_device *);
	int			(*suspend)(struct amba_device *, pm_message_t);
	int			(*resume)(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 *, resource_size_t, size_t);
void amba_device_put(struct amba_device *);
int amba_device_add(struct amba_device *, struct resource *);
int amba_device_register(struct amba_device *, struct resource *);
struct amba_device *amba_apb_device_add(struct device *parent, const char *name,
					resource_size_t base, size_t size,
					int irq1, int irq2, void *pdata,
					unsigned int periphid);
struct amba_device *amba_ahb_device_add(struct device *parent, const char *name,
					resource_size_t base, size_t size,
					int irq1, int irq2, void *pdata,
					unsigned int periphid);
void amba_device_unregister(struct amba_device *);
struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);
int amba_request_regions(struct amba_device *, const char *);
void amba_release_regions(struct amba_device *);

#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, mask)				\
	{							\
		.coherent_dma_mask = mask,			\
		.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, irqs, data)	\
struct amba_device name##_device = {				\
	.dev = __AMBA_DEV(busid, data, 0),			\
	.res = DEFINE_RES_MEM(base, SZ_4K),			\
	.irq = irqs,						\
	.periphid = id,						\
}

/*
 * AHB devices are DMA capable, so set their DMA masks
 */
#define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data)	\
struct amba_device name##_device = {				\
	.dev = __AMBA_DEV(busid, data, ~0ULL),			\
	.res = DEFINE_RES_MEM(base, SZ_4K),			\
	.dma_mask = ~0ULL,					\
	.irq = irqs,						\
	.periphid = id,						\
}

/*
 * module_amba_driver() - Helper macro for drivers that don't do anything
 * special in module init/exit.  This eliminates a lot of boilerplate.  Each
 * module may only use this macro once, and calling it replaces module_init()
 * and module_exit()
 */
#define module_amba_driver(__amba_drv) \
	module_driver(__amba_drv, amba_driver_register, amba_driver_unregister)

#endif
Commit	Line	Data
1da177e4	1	/*
4e10ae11 LW	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.
1da177e4 LT	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
7cfe2494	17	#include <linux/clk.h>
c36207a4	18	#include <linux/device.h>
1e5f9a23	19	#include <linux/mod_devicetable.h>
7cfe2494	20	#include <linux/err.h>
c36207a4	21	#include <linux/resource.h>
65500fa9	22	#include <linux/regulator/consumer.h>
c36207a4	23
1da177e4	24	#define AMBA_NR_IRQS 2
01723a95	25	#define AMBA_CID 0xb105f00d
1da177e4	26
7cfe2494 RK	27	struct clk;
7cfe2494 RK	28
1da177e4 LT	29	struct amba_device {
	30	struct device dev;
	31	struct resource res;
7cfe2494	32	struct clk *pclk;
1da177e4 LT	33	u64 dma_mask;
	34	unsigned int periphid;
	35	unsigned int irq[AMBA_NR_IRQS];
	36	};
	37
1da177e4 LT	38	struct amba_driver {
1da177e4 LT	39	struct device_driver drv;
aa25afad	40	int (probe)(struct amba_device , const struct amba_id *);
1da177e4 LT	41	int (remove)(struct amba_device );
	42	void (shutdown)(struct amba_device );
	43	int (suspend)(struct amba_device , pm_message_t);
	44	int (resume)(struct amba_device );
2d00880f	45	const struct amba_id *id_table;
1da177e4 LT	46	};
1da177e4 LT	47
f17a1f06 LW	48	enum amba_vendor {
	49	AMBA_VENDOR_ARM = 0x41,
	50	AMBA_VENDOR_ST = 0x80,
	51	};
	52
394d5aef RH	53	extern struct bus_type amba_bustype;
394d5aef RH	54
ba74ec7f RV	55	#define to_amba_device(d) container_of(d, struct amba_device, dev)
ba74ec7f RV	56
1da177e4 LT	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
	60	int amba_driver_register(struct amba_driver *);
	61	void amba_driver_unregister(struct amba_driver *);
d5dc9271 RK	62	struct amba_device amba_device_alloc(const char , resource_size_t, size_t);
	63	void amba_device_put(struct amba_device *);
	64	int amba_device_add(struct amba_device , struct resource );
1da177e4	65	int amba_device_register(struct amba_device , struct resource );
6026aa90 LW	66	struct amba_device amba_apb_device_add(struct device parent, const char *name,
	67	resource_size_t base, size_t size,
	68	int irq1, int irq2, void *pdata,
	69	unsigned int periphid);
	70	struct amba_device amba_ahb_device_add(struct device parent, const char *name,
	71	resource_size_t base, size_t size,
	72	int irq1, int irq2, void *pdata,
	73	unsigned int periphid);
1da177e4 LT	74	void amba_device_unregister(struct amba_device *);
	75	struct amba_device amba_find_device(const char , struct device *, unsigned int, unsigned int);
	76	int amba_request_regions(struct amba_device , const char );
	77	void amba_release_regions(struct amba_device *);
	78
7cfe2494 RK	79	#define amba_pclk_enable(d) \
	80	(IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))
	81
	82	#define amba_pclk_disable(d) \
	83	do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)
	84
01723a95 LW	85	/* Some drivers don't use the struct amba_device */
	86	#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
	87	#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
	88	#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)
	89	#define AMBA_PART_BITS(a) ((a) & 0xfff)
	90
	91	#define amba_config(d) AMBA_CONFIG_BITS((d)->periphid)
	92	#define amba_rev(d) AMBA_REV_BITS((d)->periphid)
	93	#define amba_manf(d) AMBA_MANF_BITS((d)->periphid)
	94	#define amba_part(d) AMBA_PART_BITS((d)->periphid)
1da177e4	95
cc6e75af RK	96	#define __AMBA_DEV(busid, data, mask) \
	97	{ \
	98	.coherent_dma_mask = mask, \
	99	.init_name = busid, \
	100	.platform_data = data, \
	101	}
	102
	103	/*
	104	* APB devices do not themselves have the ability to address memory,
	105	* so DMA masks should be zero (much like USB peripheral devices.)
	106	* The DMA controller DMA masks should be used instead (much like
	107	* USB host controllers in conventional PCs.)
	108	*/
	109	#define AMBA_APB_DEVICE(name, busid, id, base, irqs, data) \
	110	struct amba_device name##_device = { \
	111	.dev = __AMBA_DEV(busid, data, 0), \
	112	.res = DEFINE_RES_MEM(base, SZ_4K), \
	113	.irq = irqs, \
	114	.periphid = id, \
	115	}
	116
	117	/*
	118	* AHB devices are DMA capable, so set their DMA masks
	119	*/
	120	#define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data) \
	121	struct amba_device name##_device = { \
	122	.dev = __AMBA_DEV(busid, data, ~0ULL), \
	123	.res = DEFINE_RES_MEM(base, SZ_4K), \
	124	.dma_mask = ~0ULL, \
	125	.irq = irqs, \
	126	.periphid = id, \
	127	}
	128
9e5ed094	129	/*
	130	* module_amba_driver() - Helper macro for drivers that don't do anything
	131	* special in module init/exit. This eliminates a lot of boilerplate. Each
	132	* module may only use this macro once, and calling it replaces module_init()
	133	* and module_exit()
	134	*/
	135	#define module_amba_driver(__amba_drv) \
	136	module_driver(__amba_drv, amba_driver_register, amba_driver_unregister)
	137
1da177e4	138	#endif