summaryrefslogtreecommitdiffstats
path: root/include/ambapp.h
blob: d79fcedb4139a059fb650dcb626270be8c27ebf3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
/* Interface for accessing Gaisler AMBA Plug&Play Bus.
 * The AHB bus can be interfaced with a simpler bus -
 * the APB bus, also freely available in GRLIB at
 * www.gaisler.com.
 *
 * (C) Copyright 2009, 2015
 * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef __AMBAPP_H__
#define __AMBAPP_H__

#include <ambapp_ids.h>

#ifndef __ASSEMBLER__
/* Structures used to access Plug&Play information directly */
struct ambapp_pnp_ahb {
	const unsigned int	id;		/* VENDOR, DEVICE, VER, IRQ, */
	const unsigned int	custom[3];
	const unsigned int	mbar[4];	/* MASK, ADDRESS, TYPE,
						 * CACHABLE/PREFETCHABLE */
};

struct ambapp_pnp_apb {
	const unsigned int	id;		/* VENDOR, DEVICE, VER, IRQ, */
	const unsigned int	iobar;		/* MASK, ADDRESS, TYPE,
						 * CACHABLE/PREFETCHABLE */
};

/* AMBA Plug&Play AHB Masters & Slaves information locations
 * Max devices is 64 supported by HW, however often only 16
 * are used.
 */
struct ambapp_pnp_info {
	struct ambapp_pnp_ahb	masters[64];
	struct ambapp_pnp_ahb	slaves[63];
	const unsigned int	unused[4];
	const unsigned int	systemid[4];
};

/* Describes a AMBA PnP bus */
struct ambapp_bus {
	int		buses;		/* Number of buses */
	unsigned int	ioareas[6];	/* PnP I/O AREAs of AHB buses */
	unsigned int	freq;		/* Frequency of bus0 [Hz] */
};

/* Processor Local AMBA bus */
extern struct ambapp_bus ambapp_plb;

/* Get Bus frequency of a certain AMBA bus */
extern unsigned int ambapp_bus_freq(
	struct ambapp_bus *abus,
	int ahb_bus_index
	);

/* AMBA PnP information of a APB Device */
typedef struct {
	unsigned int vendor;
	unsigned int device;
	unsigned char irq;
	unsigned char ver;
	unsigned int address;
	unsigned int mask;
	int ahb_bus_index;
} ambapp_apbdev;

/* AMBA PnP information of a AHB Device */
typedef struct {
	unsigned int vendor;
	unsigned int device;
	unsigned char irq;
	unsigned char ver;
	unsigned int userdef[3];
	unsigned int address[4];
	unsigned int mask[4];
	int type[4];
	int ahb_bus_index;
} ambapp_ahbdev;

/* Scan AMBA Bus for AHB Bridges */
extern void ambapp_bus_init(
	unsigned int ioarea,
	unsigned int freq,
	struct ambapp_bus *abus);

/* Find APB Slave device by index using breath first search.
 *
 * When vendor and device are both set to zero, any device
 * with a non-zero device ID will match the search. It may be
 * useful when processing all devices on a AMBA bus.
 */
extern int ambapp_apb_find(
	struct ambapp_bus *abus,
	int vendor,
	int device,
	int index,
	ambapp_apbdev *dev
	);

/* Find AHB Master device by index using breath first search.
 *
 * When vendor and device are both set to zero, any device
 * with a non-zero device ID will match the search. It may be
 * useful when processing all devices on a AMBA bus.
 */
extern int ambapp_ahbmst_find(
	struct ambapp_bus *abus,
	int vendor,
	int device,
	int index,
	ambapp_ahbdev *dev
	);

/* Find AHB Slave device by index using breath first search.
 *
 * When vendor and device are both set to zero, any device
 * with a non-zero device ID will match the search. It may be
 * useful when processing all devices on a AMBA bus.
 */
extern int ambapp_ahbslv_find(
	struct ambapp_bus *abus,
	int vendor,
	int device,
	int index,
	ambapp_ahbdev *dev
	);

/* Return number of APB Slave devices of a certain ID (VENDOR:DEVICE)
 * zero is returned if no devices was found.
 */
extern int ambapp_apb_count(struct ambapp_bus *abus, int vendor, int device);

/* Return number of AHB Master devices of a certain ID (VENDOR:DEVICE)
 * zero is returned if no devices was found.
 */
extern int ambapp_ahbmst_count(struct ambapp_bus *abus, int vendor, int device);

/* Return number of AHB Slave devices of a certain ID (VENDOR:DEVICE)
 * zero is returned if no devices was found.
 */
extern int ambapp_ahbslv_count(struct ambapp_bus *abus, int vendor, int device);

#ifdef CONFIG_CMD_AMBAPP

/* AMBA Plug&Play relocation & initialization */
int ambapp_init_reloc(void);

/* AMBA Plug&Play Name of Vendors and devices */

/* Return name of device */
char *ambapp_device_id2str(int vendor, int id);

/* Return name of vendor */
char *ambapp_vendor_id2str(int vendor);

/* Return description of a device */
char *ambapp_device_id2desc(int vendor, int id);

#endif

#endif /* defined(__ASSEMBLER__) */

#define AMBA_DEFAULT_IOAREA 0xfff00000
#define AMBA_CONF_AREA 0xff000
#define AMBA_AHB_SLAVE_CONF_AREA 0x800

#define DEV_NONE	0
#define DEV_AHB_MST	1
#define DEV_AHB_SLV	2
#define DEV_APB_SLV	3

#define AMBA_TYPE_APBIO 0x1
#define AMBA_TYPE_MEM 0x2
#define AMBA_TYPE_AHBIO 0x3

/* ID layout for APB and AHB devices */
#define AMBA_PNP_ID(vendor, device) (((vendor)<<24) | ((device)<<12))

/* APB Slave PnP layout definitions */
#define AMBA_APB_ID_OFS		(0*4)
#define AMBA_APB_IOBAR_OFS	(1*4)
#define AMBA_APB_CONF_LENGH	(2*4)

/* AHB Master/Slave layout PnP definitions */
#define AMBA_AHB_ID_OFS		(0*4)
#define AMBA_AHB_CUSTOM0_OFS	(1*4)
#define AMBA_AHB_CUSTOM1_OFS	(2*4)
#define AMBA_AHB_CUSTOM2_OFS	(3*4)
#define AMBA_AHB_MBAR0_OFS	(4*4)
#define AMBA_AHB_MBAR1_OFS	(5*4)
#define AMBA_AHB_MBAR2_OFS	(6*4)
#define AMBA_AHB_MBAR3_OFS	(7*4)
#define AMBA_AHB_CONF_LENGH	(8*4)

/* Macros for extracting information from AMBA PnP information
 * registers.
 */

#define amba_vendor(x) (((x) >> 24) & 0xff)

#define amba_device(x) (((x) >> 12) & 0xfff)

#define amba_irq(conf) ((conf) & 0x1f)

#define amba_ver(conf) (((conf)>>5) & 0x1f)

#define amba_iobar_start(base, iobar) \
	((base) | ((((iobar) & 0xfff00000)>>12) & (((iobar) & 0xfff0)<<4)))

#define amba_membar_start(mbar) \
	(((mbar) & 0xfff00000) & (((mbar) & 0xfff0) << 16))

#define amba_membar_type(mbar) ((mbar) & 0xf)

#define amba_membar_mask(mbar) (((mbar) >> 4) & 0xfff)

#define amba_ahbio_adr(addr, base_ioarea) \
	((unsigned int)(base_ioarea) | ((addr) >> 12))

#define amba_apb_mask(iobar) ((~(amba_membar_mask(iobar)<<8) & 0x000fffff) + 1)

#endif
OpenPOWER on IntegriCloud