Commit | Line | Data |
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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 | |
4d8981f6 | 24 | #define AMBA_NR_IRQS 9 |
01723a95 | 25 | #define AMBA_CID 0xb105f00d |
a06ae860 | 26 | #define CORESIGHT_CID 0xb105900d |
1da177e4 | 27 | |
7cfe2494 RK |
28 | struct clk; |
29 | ||
1da177e4 LT |
30 | struct amba_device { |
31 | struct device dev; | |
32 | struct resource res; | |
7cfe2494 | 33 | struct clk *pclk; |
1da177e4 LT |
34 | unsigned int periphid; |
35 | unsigned int irq[AMBA_NR_IRQS]; | |
3cf38571 | 36 | char *driver_override; |
1da177e4 LT |
37 | }; |
38 | ||
1da177e4 LT |
39 | struct amba_driver { |
40 | struct device_driver drv; | |
aa25afad | 41 | int (*probe)(struct amba_device *, const struct amba_id *); |
1da177e4 LT |
42 | int (*remove)(struct amba_device *); |
43 | void (*shutdown)(struct amba_device *); | |
2d00880f | 44 | const struct amba_id *id_table; |
1da177e4 LT |
45 | }; |
46 | ||
db4fa45e AB |
47 | /* |
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. | |
50 | */ | |
f17a1f06 LW |
51 | enum amba_vendor { |
52 | AMBA_VENDOR_ARM = 0x41, | |
53 | AMBA_VENDOR_ST = 0x80, | |
fbebf597 | 54 | AMBA_VENDOR_QCOM = 0x51, |
db4fa45e | 55 | AMBA_VENDOR_LSI = 0xb6, |
f17a1f06 LW |
56 | }; |
57 | ||
394d5aef RH |
58 | extern struct bus_type amba_bustype; |
59 | ||
ba74ec7f RV |
60 | #define to_amba_device(d) container_of(d, struct amba_device, dev) |
61 | ||
1da177e4 LT |
62 | #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) |
63 | #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) | |
64 | ||
65 | int amba_driver_register(struct amba_driver *); | |
66 | void amba_driver_unregister(struct amba_driver *); | |
d5dc9271 RK |
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 *); | |
1da177e4 | 70 | int amba_device_register(struct amba_device *, struct resource *); |
6026aa90 LW |
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); | |
3ad909bc LW |
79 | struct amba_device * |
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); | |
84 | struct amba_device * | |
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); | |
1da177e4 LT |
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 *); | |
93 | ||
67c2b9cb KK |
94 | static inline int amba_pclk_enable(struct amba_device *dev) |
95 | { | |
96 | return clk_enable(dev->pclk); | |
97 | } | |
7cfe2494 | 98 | |
67c2b9cb KK |
99 | static inline void amba_pclk_disable(struct amba_device *dev) |
100 | { | |
101 | clk_disable(dev->pclk); | |
102 | } | |
7cfe2494 | 103 | |
f560e322 KK |
104 | static inline int amba_pclk_prepare(struct amba_device *dev) |
105 | { | |
106 | return clk_prepare(dev->pclk); | |
107 | } | |
108 | ||
109 | static inline void amba_pclk_unprepare(struct amba_device *dev) | |
110 | { | |
111 | clk_unprepare(dev->pclk); | |
112 | } | |
113 | ||
01723a95 LW |
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) | |
119 | ||
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) | |
1da177e4 | 124 | |
cc6e75af RK |
125 | #define __AMBA_DEV(busid, data, mask) \ |
126 | { \ | |
127 | .coherent_dma_mask = mask, \ | |
128 | .init_name = busid, \ | |
129 | .platform_data = data, \ | |
130 | } | |
131 | ||
132 | /* | |
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.) | |
137 | */ | |
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), \ | |
142 | .irq = irqs, \ | |
143 | .periphid = id, \ | |
144 | } | |
145 | ||
146 | /* | |
147 | * AHB devices are DMA capable, so set their DMA masks | |
148 | */ | |
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), \ | |
cc6e75af RK |
153 | .irq = irqs, \ |
154 | .periphid = id, \ | |
155 | } | |
156 | ||
9e5ed094 | 157 | /* |
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() | |
161 | * and module_exit() | |
162 | */ | |
163 | #define module_amba_driver(__amba_drv) \ | |
164 | module_driver(__amba_drv, amba_driver_register, amba_driver_unregister) | |
165 | ||
941943cf PG |
166 | /* |
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 | |
170 | * device_initcall(). | |
171 | */ | |
172 | #define builtin_amba_driver(__amba_drv) \ | |
173 | builtin_driver(__amba_drv, amba_driver_register) | |
174 | ||
1da177e4 | 175 | #endif |