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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, |
2426fbc7 | 56 | AMBA_VENDOR_LINUX = 0xfe, /* This value is not official */ |
f17a1f06 LW |
57 | }; |
58 | ||
2426fbc7 SG |
59 | /* This is used to generate pseudo-ID for AMBA device */ |
60 | #define AMBA_LINUX_ID(conf, rev, part) \ | |
61 | (((conf) & 0xff) << 24 | ((rev) & 0xf) << 20 | \ | |
62 | AMBA_VENDOR_LINUX << 12 | ((part) & 0xfff)) | |
63 | ||
394d5aef RH |
64 | extern struct bus_type amba_bustype; |
65 | ||
ba74ec7f RV |
66 | #define to_amba_device(d) container_of(d, struct amba_device, dev) |
67 | ||
1da177e4 LT |
68 | #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) |
69 | #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) | |
70 | ||
71 | int amba_driver_register(struct amba_driver *); | |
72 | void amba_driver_unregister(struct amba_driver *); | |
d5dc9271 RK |
73 | struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t); |
74 | void amba_device_put(struct amba_device *); | |
75 | int amba_device_add(struct amba_device *, struct resource *); | |
1da177e4 | 76 | int amba_device_register(struct amba_device *, struct resource *); |
6026aa90 LW |
77 | struct amba_device *amba_apb_device_add(struct device *parent, const char *name, |
78 | resource_size_t base, size_t size, | |
79 | int irq1, int irq2, void *pdata, | |
80 | unsigned int periphid); | |
81 | struct amba_device *amba_ahb_device_add(struct device *parent, const char *name, | |
82 | resource_size_t base, size_t size, | |
83 | int irq1, int irq2, void *pdata, | |
84 | unsigned int periphid); | |
3ad909bc LW |
85 | struct amba_device * |
86 | amba_apb_device_add_res(struct device *parent, const char *name, | |
87 | resource_size_t base, size_t size, int irq1, | |
88 | int irq2, void *pdata, unsigned int periphid, | |
89 | struct resource *resbase); | |
90 | struct amba_device * | |
91 | amba_ahb_device_add_res(struct device *parent, const char *name, | |
92 | resource_size_t base, size_t size, int irq1, | |
93 | int irq2, void *pdata, unsigned int periphid, | |
94 | struct resource *resbase); | |
1da177e4 LT |
95 | void amba_device_unregister(struct amba_device *); |
96 | struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int); | |
97 | int amba_request_regions(struct amba_device *, const char *); | |
98 | void amba_release_regions(struct amba_device *); | |
99 | ||
67c2b9cb KK |
100 | static inline int amba_pclk_enable(struct amba_device *dev) |
101 | { | |
102 | return clk_enable(dev->pclk); | |
103 | } | |
7cfe2494 | 104 | |
67c2b9cb KK |
105 | static inline void amba_pclk_disable(struct amba_device *dev) |
106 | { | |
107 | clk_disable(dev->pclk); | |
108 | } | |
7cfe2494 | 109 | |
f560e322 KK |
110 | static inline int amba_pclk_prepare(struct amba_device *dev) |
111 | { | |
112 | return clk_prepare(dev->pclk); | |
113 | } | |
114 | ||
115 | static inline void amba_pclk_unprepare(struct amba_device *dev) | |
116 | { | |
117 | clk_unprepare(dev->pclk); | |
118 | } | |
119 | ||
01723a95 LW |
120 | /* Some drivers don't use the struct amba_device */ |
121 | #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) | |
122 | #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) | |
123 | #define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff) | |
124 | #define AMBA_PART_BITS(a) ((a) & 0xfff) | |
125 | ||
126 | #define amba_config(d) AMBA_CONFIG_BITS((d)->periphid) | |
127 | #define amba_rev(d) AMBA_REV_BITS((d)->periphid) | |
128 | #define amba_manf(d) AMBA_MANF_BITS((d)->periphid) | |
129 | #define amba_part(d) AMBA_PART_BITS((d)->periphid) | |
1da177e4 | 130 | |
cc6e75af RK |
131 | #define __AMBA_DEV(busid, data, mask) \ |
132 | { \ | |
133 | .coherent_dma_mask = mask, \ | |
134 | .init_name = busid, \ | |
135 | .platform_data = data, \ | |
136 | } | |
137 | ||
138 | /* | |
139 | * APB devices do not themselves have the ability to address memory, | |
140 | * so DMA masks should be zero (much like USB peripheral devices.) | |
141 | * The DMA controller DMA masks should be used instead (much like | |
142 | * USB host controllers in conventional PCs.) | |
143 | */ | |
144 | #define AMBA_APB_DEVICE(name, busid, id, base, irqs, data) \ | |
145 | struct amba_device name##_device = { \ | |
146 | .dev = __AMBA_DEV(busid, data, 0), \ | |
147 | .res = DEFINE_RES_MEM(base, SZ_4K), \ | |
148 | .irq = irqs, \ | |
149 | .periphid = id, \ | |
150 | } | |
151 | ||
152 | /* | |
153 | * AHB devices are DMA capable, so set their DMA masks | |
154 | */ | |
155 | #define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data) \ | |
156 | struct amba_device name##_device = { \ | |
157 | .dev = __AMBA_DEV(busid, data, ~0ULL), \ | |
158 | .res = DEFINE_RES_MEM(base, SZ_4K), \ | |
cc6e75af RK |
159 | .irq = irqs, \ |
160 | .periphid = id, \ | |
161 | } | |
162 | ||
9e5ed094 VK |
163 | /* |
164 | * module_amba_driver() - Helper macro for drivers that don't do anything | |
165 | * special in module init/exit. This eliminates a lot of boilerplate. Each | |
166 | * module may only use this macro once, and calling it replaces module_init() | |
167 | * and module_exit() | |
168 | */ | |
169 | #define module_amba_driver(__amba_drv) \ | |
170 | module_driver(__amba_drv, amba_driver_register, amba_driver_unregister) | |
171 | ||
941943cf PG |
172 | /* |
173 | * builtin_amba_driver() - Helper macro for drivers that don't do anything | |
174 | * special in driver initcall. This eliminates a lot of boilerplate. Each | |
175 | * driver may only use this macro once, and calling it replaces the instance | |
176 | * device_initcall(). | |
177 | */ | |
178 | #define builtin_amba_driver(__amba_drv) \ | |
179 | builtin_driver(__amba_drv, amba_driver_register) | |
180 | ||
1da177e4 | 181 | #endif |