1 /*
2  *  Driver for the Conexant CX25821 PCIe bridge
3  *
4  *  Copyright (C) 2009 Conexant Systems Inc.
5  *  Authors  <hiep.huynh@conexant.com>, <shu.lin@conexant.com>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License, or
10  *  (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  */
22 
23 #include <linux/mutex.h>
24 #include <linux/workqueue.h>
25 
26 #define NUM_AUDIO_PROGS       8
27 #define NUM_AUDIO_FRAMES      8
28 #define END_OF_FILE           0
29 #define IN_PROGRESS           1
30 #define RESET_STATUS          -1
31 #define FIFO_DISABLE          0
32 #define FIFO_ENABLE           1
33 #define NUM_NO_OPS            4
34 
35 #define RISC_READ_INSTRUCTION_SIZE      12
36 #define RISC_JUMP_INSTRUCTION_SIZE      12
37 #define RISC_WRITECR_INSTRUCTION_SIZE   16
38 #define RISC_SYNC_INSTRUCTION_SIZE      4
39 #define DWORD_SIZE                      4
40 #define AUDIO_SYNC_LINE                 4
41 
42 #define LINES_PER_AUDIO_BUFFER      15
43 #define AUDIO_LINE_SIZE             128
44 #define AUDIO_DATA_BUF_SZ           (AUDIO_LINE_SIZE * LINES_PER_AUDIO_BUFFER)
45 
46 #define USE_RISC_NOOP_AUDIO   1
47 
48 #ifdef USE_RISC_NOOP_AUDIO
49 #define AUDIO_RISC_DMA_BUF_SIZE    (LINES_PER_AUDIO_BUFFER*RISC_READ_INSTRUCTION_SIZE + RISC_WRITECR_INSTRUCTION_SIZE + NUM_NO_OPS*DWORD_SIZE + RISC_JUMP_INSTRUCTION_SIZE)
50 #endif
51 
52 #ifndef USE_RISC_NOOP_AUDIO
53 #define AUDIO_RISC_DMA_BUF_SIZE    (LINES_PER_AUDIO_BUFFER*RISC_READ_INSTRUCTION_SIZE + RISC_WRITECR_INSTRUCTION_SIZE + RISC_JUMP_INSTRUCTION_SIZE)
54 #endif
55 
56 static int _line_size;
57 char *_defaultAudioName = "/root/audioGOOD.wav";
58