summaryrefslogtreecommitdiff
path: root/arch/arm/mach-bcm2709/vc_support.c
blob: 0bc41c4f5dd445816c1f92c68e44b52216b9905b (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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
/*
 * vc_support.c
 *
 *  Created on: 25 Nov 2012
 *      Author: Simon
 */

#include <linux/module.h>
#include <mach/vcio.h>

#ifdef ECLIPSE_IGNORE

#define __user
#define __init
#define __exit
#define __iomem
#define KERN_DEBUG
#define KERN_ERR
#define KERN_WARNING
#define KERN_INFO
#define _IOWR(a, b, c) b
#define _IOW(a, b, c) b
#define _IO(a, b) b

#endif

/****** VC MAILBOX FUNCTIONALITY ******/
unsigned int AllocateVcMemory(unsigned int *pHandle, unsigned int size, unsigned int alignment, unsigned int flags)
{
	struct vc_msg
	{
		unsigned int m_msgSize;
		unsigned int m_response;

		struct vc_tag
		{
			unsigned int m_tagId;
			unsigned int m_sendBufferSize;
			union {
				unsigned int m_sendDataSize;
				unsigned int m_recvDataSize;
			};

			struct args
			{
				union {
					unsigned int m_size;
					unsigned int m_handle;
				};
				unsigned int m_alignment;
				unsigned int m_flags;
			} m_args;
		} m_tag;

		unsigned int m_endTag;
	} msg;
	int s;

	msg.m_msgSize = sizeof(msg);
	msg.m_response = 0;
	msg.m_endTag = 0;

	//fill in the tag for the allocation command
	msg.m_tag.m_tagId = 0x3000c;
	msg.m_tag.m_sendBufferSize = 12;
	msg.m_tag.m_sendDataSize = 12;

	//fill in our args
	msg.m_tag.m_args.m_size = size;
	msg.m_tag.m_args.m_alignment = alignment;
	msg.m_tag.m_args.m_flags = flags;

	//run the command
	s = bcm_mailbox_property(&msg, sizeof(msg));

	if (s == 0 && msg.m_response == 0x80000000 && msg.m_tag.m_recvDataSize == 0x80000004)
	{
		*pHandle = msg.m_tag.m_args.m_handle;
		return 0;
	}
	else
	{
		printk(KERN_ERR "failed to allocate vc memory: s=%d response=%08x recv data size=%08x\n",
				s, msg.m_response, msg.m_tag.m_recvDataSize);
		return 1;
	}
}

unsigned int ReleaseVcMemory(unsigned int handle)
{
	struct vc_msg
	{
		unsigned int m_msgSize;
		unsigned int m_response;

		struct vc_tag
		{
			unsigned int m_tagId;
			unsigned int m_sendBufferSize;
			union {
				unsigned int m_sendDataSize;
				unsigned int m_recvDataSize;
			};

			struct args
			{
				union {
					unsigned int m_handle;
					unsigned int m_error;
				};
			} m_args;
		} m_tag;

		unsigned int m_endTag;
	} msg;
	int s;

	msg.m_msgSize = sizeof(msg);
	msg.m_response = 0;
	msg.m_endTag = 0;

	//fill in the tag for the release command
	msg.m_tag.m_tagId = 0x3000f;
	msg.m_tag.m_sendBufferSize = 4;
	msg.m_tag.m_sendDataSize = 4;

	//pass across the handle
	msg.m_tag.m_args.m_handle = handle;

	s = bcm_mailbox_property(&msg, sizeof(msg));

	if (s == 0 && msg.m_response == 0x80000000 && msg.m_tag.m_recvDataSize == 0x80000004 && msg.m_tag.m_args.m_error == 0)
		return 0;
	else
	{
		printk(KERN_ERR "failed to release vc memory: s=%d response=%08x recv data size=%08x error=%08x\n",
				s, msg.m_response, msg.m_tag.m_recvDataSize, msg.m_tag.m_args.m_error);
		return 1;
	}
}

unsigned int LockVcMemory(unsigned int *pBusAddress, unsigned int handle)
{
	struct vc_msg
	{
		unsigned int m_msgSize;
		unsigned int m_response;

		struct vc_tag
		{
			unsigned int m_tagId;
			unsigned int m_sendBufferSize;
			union {
				unsigned int m_sendDataSize;
				unsigned int m_recvDataSize;
			};

			struct args
			{
				union {
					unsigned int m_handle;
					unsigned int m_busAddress;
				};
			} m_args;
		} m_tag;

		unsigned int m_endTag;
	} msg;
	int s;

	msg.m_msgSize = sizeof(msg);
	msg.m_response = 0;
	msg.m_endTag = 0;

	//fill in the tag for the lock command
	msg.m_tag.m_tagId = 0x3000d;
	msg.m_tag.m_sendBufferSize = 4;
	msg.m_tag.m_sendDataSize = 4;

	//pass across the handle
	msg.m_tag.m_args.m_handle = handle;

	s = bcm_mailbox_property(&msg, sizeof(msg));

	if (s == 0 && msg.m_response == 0x80000000 && msg.m_tag.m_recvDataSize == 0x80000004)
	{
		//pick out the bus address
		*pBusAddress = msg.m_tag.m_args.m_busAddress;
		return 0;
	}
	else
	{
		printk(KERN_ERR "failed to lock vc memory: s=%d response=%08x recv data size=%08x\n",
				s, msg.m_response, msg.m_tag.m_recvDataSize);
		return 1;
	}
}

unsigned int UnlockVcMemory(unsigned int handle)
{
	struct vc_msg
	{
		unsigned int m_msgSize;
		unsigned int m_response;

		struct vc_tag
		{
			unsigned int m_tagId;
			unsigned int m_sendBufferSize;
			union {
				unsigned int m_sendDataSize;
				unsigned int m_recvDataSize;
			};

			struct args
			{
				union {
					unsigned int m_handle;
					unsigned int m_error;
				};
			} m_args;
		} m_tag;

		unsigned int m_endTag;
	} msg;
	int s;

	msg.m_msgSize = sizeof(msg);
	msg.m_response = 0;
	msg.m_endTag = 0;

	//fill in the tag for the unlock command
	msg.m_tag.m_tagId = 0x3000e;
	msg.m_tag.m_sendBufferSize = 4;
	msg.m_tag.m_sendDataSize = 4;

	//pass across the handle
	msg.m_tag.m_args.m_handle = handle;

	s = bcm_mailbox_property(&msg, sizeof(msg));

	//check the error code too
	if (s == 0 && msg.m_response == 0x80000000 && msg.m_tag.m_recvDataSize == 0x80000004 && msg.m_tag.m_args.m_error == 0)
		return 0;
	else
	{
		printk(KERN_ERR "failed to unlock vc memory: s=%d response=%08x recv data size=%08x error%08x\n",
				s, msg.m_response, msg.m_tag.m_recvDataSize, msg.m_tag.m_args.m_error);
		return 1;
	}
}

unsigned int ExecuteVcCode(unsigned int code,
		unsigned int r0, unsigned int r1, unsigned int r2, unsigned int r3, unsigned int r4, unsigned int r5)
{
	struct vc_msg
	{
		unsigned int m_msgSize;
		unsigned int m_response;

		struct vc_tag
		{
			unsigned int m_tagId;
			unsigned int m_sendBufferSize;
			union {
				unsigned int m_sendDataSize;
				unsigned int m_recvDataSize;
			};

			struct args
			{
				union {
					unsigned int m_pCode;
					unsigned int m_return;
				};
				unsigned int m_r0;
				unsigned int m_r1;
				unsigned int m_r2;
				unsigned int m_r3;
				unsigned int m_r4;
				unsigned int m_r5;
			} m_args;
		} m_tag;

		unsigned int m_endTag;
	} msg;
	int s;

	msg.m_msgSize = sizeof(msg);
	msg.m_response = 0;
	msg.m_endTag = 0;

	//fill in the tag for the unlock command
	msg.m_tag.m_tagId = 0x30010;
	msg.m_tag.m_sendBufferSize = 28;
	msg.m_tag.m_sendDataSize = 28;

	//pass across the handle
	msg.m_tag.m_args.m_pCode = code;
	msg.m_tag.m_args.m_r0 = r0;
	msg.m_tag.m_args.m_r1 = r1;
	msg.m_tag.m_args.m_r2 = r2;
	msg.m_tag.m_args.m_r3 = r3;
	msg.m_tag.m_args.m_r4 = r4;
	msg.m_tag.m_args.m_r5 = r5;

	s = bcm_mailbox_property(&msg, sizeof(msg));

	//check the error code too
	if (s == 0 && msg.m_response == 0x80000000 && msg.m_tag.m_recvDataSize == 0x80000004)
		return msg.m_tag.m_args.m_return;
	else
	{
		printk(KERN_ERR "failed to execute: s=%d response=%08x recv data size=%08x\n",
				s, msg.m_response, msg.m_tag.m_recvDataSize);
		return 1;
	}
}