2 * linux/include/amba/bus.h
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.
8 * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
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.
17 #include <linux/clk.h>
18 #include <linux/device.h>
19 #include <linux/mod_devicetable.h>
20 #include <linux/err.h>
21 #include <linux/resource.h>
22 #include <linux/regulator/consumer.h>
24 #define AMBA_NR_IRQS 9
25 #define AMBA_CID 0xb105f00d
26 #define CORESIGHT_CID 0xb105900d
34 unsigned int periphid
;
35 unsigned int irq
[AMBA_NR_IRQS
];
36 char *driver_override
;
40 struct device_driver drv
;
41 int (*probe
)(struct amba_device
*, const struct amba_id
*);
42 int (*remove
)(struct amba_device
*);
43 void (*shutdown
)(struct amba_device
*);
44 const struct amba_id
*id_table
;
48 * Constants for the designer field of the Peripheral ID register. When bit 7
49 * is set to '1', bits [6:0] should be the JEP106 manufacturer identity code.
52 AMBA_VENDOR_ARM
= 0x41,
53 AMBA_VENDOR_ST
= 0x80,
54 AMBA_VENDOR_QCOM
= 0x51,
55 AMBA_VENDOR_LSI
= 0xb6,
58 extern struct bus_type amba_bustype
;
60 #define to_amba_device(d) container_of(d, struct amba_device, dev)
62 #define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
63 #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
65 int amba_driver_register(struct amba_driver
*);
66 void amba_driver_unregister(struct amba_driver
*);
67 struct amba_device
*amba_device_alloc(const char *, resource_size_t
, size_t);
68 void amba_device_put(struct amba_device
*);
69 int amba_device_add(struct amba_device
*, struct resource
*);
70 int amba_device_register(struct amba_device
*, struct resource
*);
71 struct amba_device
*amba_apb_device_add(struct device
*parent
, const char *name
,
72 resource_size_t base
, size_t size
,
73 int irq1
, int irq2
, void *pdata
,
74 unsigned int periphid
);
75 struct amba_device
*amba_ahb_device_add(struct device
*parent
, const char *name
,
76 resource_size_t base
, size_t size
,
77 int irq1
, int irq2
, void *pdata
,
78 unsigned int periphid
);
80 amba_apb_device_add_res(struct device
*parent
, const char *name
,
81 resource_size_t base
, size_t size
, int irq1
,
82 int irq2
, void *pdata
, unsigned int periphid
,
83 struct resource
*resbase
);
85 amba_ahb_device_add_res(struct device
*parent
, const char *name
,
86 resource_size_t base
, size_t size
, int irq1
,
87 int irq2
, void *pdata
, unsigned int periphid
,
88 struct resource
*resbase
);
89 void amba_device_unregister(struct amba_device
*);
90 struct amba_device
*amba_find_device(const char *, struct device
*, unsigned int, unsigned int);
91 int amba_request_regions(struct amba_device
*, const char *);
92 void amba_release_regions(struct amba_device
*);
94 static inline int amba_pclk_enable(struct amba_device
*dev
)
96 return clk_enable(dev
->pclk
);
99 static inline void amba_pclk_disable(struct amba_device
*dev
)
101 clk_disable(dev
->pclk
);
104 static inline int amba_pclk_prepare(struct amba_device
*dev
)
106 return clk_prepare(dev
->pclk
);
109 static inline void amba_pclk_unprepare(struct amba_device
*dev
)
111 clk_unprepare(dev
->pclk
);
114 /* Some drivers don't use the struct amba_device */
115 #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
116 #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
117 #define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)
118 #define AMBA_PART_BITS(a) ((a) & 0xfff)
120 #define amba_config(d) AMBA_CONFIG_BITS((d)->periphid)
121 #define amba_rev(d) AMBA_REV_BITS((d)->periphid)
122 #define amba_manf(d) AMBA_MANF_BITS((d)->periphid)
123 #define amba_part(d) AMBA_PART_BITS((d)->periphid)
125 #define __AMBA_DEV(busid, data, mask) \
127 .coherent_dma_mask = mask, \
128 .init_name = busid, \
129 .platform_data = data, \
133 * APB devices do not themselves have the ability to address memory,
134 * so DMA masks should be zero (much like USB peripheral devices.)
135 * The DMA controller DMA masks should be used instead (much like
136 * USB host controllers in conventional PCs.)
138 #define AMBA_APB_DEVICE(name, busid, id, base, irqs, data) \
139 struct amba_device name##_device = { \
140 .dev = __AMBA_DEV(busid, data, 0), \
141 .res = DEFINE_RES_MEM(base, SZ_4K), \
147 * AHB devices are DMA capable, so set their DMA masks
149 #define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data) \
150 struct amba_device name##_device = { \
151 .dev = __AMBA_DEV(busid, data, ~0ULL), \
152 .res = DEFINE_RES_MEM(base, SZ_4K), \
158 * module_amba_driver() - Helper macro for drivers that don't do anything
159 * special in module init/exit. This eliminates a lot of boilerplate. Each
160 * module may only use this macro once, and calling it replaces module_init()
163 #define module_amba_driver(__amba_drv) \
164 module_driver(__amba_drv, amba_driver_register, amba_driver_unregister)
167 * builtin_amba_driver() - Helper macro for drivers that don't do anything
168 * special in driver initcall. This eliminates a lot of boilerplate. Each
169 * driver may only use this macro once, and calling it replaces the instance
172 #define builtin_amba_driver(__amba_drv) \
173 builtin_driver(__amba_drv, amba_driver_register)
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