]>
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 | |
4d8981f6 | 24 | #define AMBA_NR_IRQS 9 |
01723a95 | 25 | #define AMBA_CID 0xb105f00d |
1da177e4 | 26 | |
7cfe2494 RK |
27 | struct clk; |
28 | ||
1da177e4 LT |
29 | struct amba_device { |
30 | struct device dev; | |
31 | struct resource res; | |
7cfe2494 | 32 | struct clk *pclk; |
1da177e4 LT |
33 | unsigned int periphid; |
34 | unsigned int irq[AMBA_NR_IRQS]; | |
35 | }; | |
36 | ||
1da177e4 LT |
37 | struct amba_driver { |
38 | struct device_driver drv; | |
aa25afad | 39 | int (*probe)(struct amba_device *, const struct amba_id *); |
1da177e4 LT |
40 | int (*remove)(struct amba_device *); |
41 | void (*shutdown)(struct amba_device *); | |
42 | int (*suspend)(struct amba_device *, pm_message_t); | |
43 | int (*resume)(struct amba_device *); | |
2d00880f | 44 | const struct amba_id *id_table; |
1da177e4 LT |
45 | }; |
46 | ||
f17a1f06 LW |
47 | enum amba_vendor { |
48 | AMBA_VENDOR_ARM = 0x41, | |
49 | AMBA_VENDOR_ST = 0x80, | |
50 | }; | |
51 | ||
394d5aef RH |
52 | extern struct bus_type amba_bustype; |
53 | ||
ba74ec7f RV |
54 | #define to_amba_device(d) container_of(d, struct amba_device, dev) |
55 | ||
1da177e4 LT |
56 | #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) |
57 | #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) | |
58 | ||
59 | int amba_driver_register(struct amba_driver *); | |
60 | void amba_driver_unregister(struct amba_driver *); | |
d5dc9271 RK |
61 | struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t); |
62 | void amba_device_put(struct amba_device *); | |
63 | int amba_device_add(struct amba_device *, struct resource *); | |
1da177e4 | 64 | int amba_device_register(struct amba_device *, struct resource *); |
6026aa90 LW |
65 | struct amba_device *amba_apb_device_add(struct device *parent, const char *name, |
66 | resource_size_t base, size_t size, | |
67 | int irq1, int irq2, void *pdata, | |
68 | unsigned int periphid); | |
69 | struct amba_device *amba_ahb_device_add(struct device *parent, const char *name, | |
70 | resource_size_t base, size_t size, | |
71 | int irq1, int irq2, void *pdata, | |
72 | unsigned int periphid); | |
3ad909bc LW |
73 | struct amba_device * |
74 | amba_apb_device_add_res(struct device *parent, const char *name, | |
75 | resource_size_t base, size_t size, int irq1, | |
76 | int irq2, void *pdata, unsigned int periphid, | |
77 | struct resource *resbase); | |
78 | struct amba_device * | |
79 | amba_ahb_device_add_res(struct device *parent, const char *name, | |
80 | resource_size_t base, size_t size, int irq1, | |
81 | int irq2, void *pdata, unsigned int periphid, | |
82 | struct resource *resbase); | |
1da177e4 LT |
83 | void amba_device_unregister(struct amba_device *); |
84 | struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int); | |
85 | int amba_request_regions(struct amba_device *, const char *); | |
86 | void amba_release_regions(struct amba_device *); | |
87 | ||
7cfe2494 RK |
88 | #define amba_pclk_enable(d) \ |
89 | (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk)) | |
90 | ||
91 | #define amba_pclk_disable(d) \ | |
92 | do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) | |
93 | ||
01723a95 LW |
94 | /* Some drivers don't use the struct amba_device */ |
95 | #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) | |
96 | #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) | |
97 | #define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff) | |
98 | #define AMBA_PART_BITS(a) ((a) & 0xfff) | |
99 | ||
100 | #define amba_config(d) AMBA_CONFIG_BITS((d)->periphid) | |
101 | #define amba_rev(d) AMBA_REV_BITS((d)->periphid) | |
102 | #define amba_manf(d) AMBA_MANF_BITS((d)->periphid) | |
103 | #define amba_part(d) AMBA_PART_BITS((d)->periphid) | |
1da177e4 | 104 | |
cc6e75af RK |
105 | #define __AMBA_DEV(busid, data, mask) \ |
106 | { \ | |
107 | .coherent_dma_mask = mask, \ | |
108 | .init_name = busid, \ | |
109 | .platform_data = data, \ | |
110 | } | |
111 | ||
112 | /* | |
113 | * APB devices do not themselves have the ability to address memory, | |
114 | * so DMA masks should be zero (much like USB peripheral devices.) | |
115 | * The DMA controller DMA masks should be used instead (much like | |
116 | * USB host controllers in conventional PCs.) | |
117 | */ | |
118 | #define AMBA_APB_DEVICE(name, busid, id, base, irqs, data) \ | |
119 | struct amba_device name##_device = { \ | |
120 | .dev = __AMBA_DEV(busid, data, 0), \ | |
121 | .res = DEFINE_RES_MEM(base, SZ_4K), \ | |
122 | .irq = irqs, \ | |
123 | .periphid = id, \ | |
124 | } | |
125 | ||
126 | /* | |
127 | * AHB devices are DMA capable, so set their DMA masks | |
128 | */ | |
129 | #define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data) \ | |
130 | struct amba_device name##_device = { \ | |
131 | .dev = __AMBA_DEV(busid, data, ~0ULL), \ | |
132 | .res = DEFINE_RES_MEM(base, SZ_4K), \ | |
cc6e75af RK |
133 | .irq = irqs, \ |
134 | .periphid = id, \ | |
135 | } | |
136 | ||
9e5ed094 VK |
137 | /* |
138 | * module_amba_driver() - Helper macro for drivers that don't do anything | |
139 | * special in module init/exit. This eliminates a lot of boilerplate. Each | |
140 | * module may only use this macro once, and calling it replaces module_init() | |
141 | * and module_exit() | |
142 | */ | |
143 | #define module_amba_driver(__amba_drv) \ | |
144 | module_driver(__amba_drv, amba_driver_register, amba_driver_unregister) | |
145 | ||
1da177e4 | 146 | #endif |