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6c742509 SG |
1 | /* |
2 | * atmel_ssc_dai.h - ALSA SSC interface for the Atmel SoC | |
3 | * | |
4 | * Copyright (C) 2005 SAN People | |
5 | * Copyright (C) 2008 Atmel | |
6 | * | |
7 | * Author: Sedji Gaouaou <sedji.gaouaou@atmel.com> | |
8 | * ATMEL CORP. | |
9 | * | |
10 | * Based on at91-ssc.c by | |
11 | * Frank Mandarino <fmandarino@endrelia.com> | |
12 | * Based on pxa2xx Platform drivers by | |
64ca0404 | 13 | * Liam Girdwood <lrg@slimlogic.co.uk> |
6c742509 SG |
14 | * |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2 of the License, or | |
18 | * (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
28 | */ | |
29 | ||
30 | #ifndef _ATMEL_SSC_DAI_H | |
31 | #define _ATMEL_SSC_DAI_H | |
32 | ||
33 | #include <linux/types.h> | |
34 | #include <linux/atmel-ssc.h> | |
35 | ||
36 | #include "atmel-pcm.h" | |
37 | ||
38 | /* SSC system clock ids */ | |
39 | #define ATMEL_SYSCLK_MCK 0 /* SSC uses AT91 MCK as system clock */ | |
40 | ||
41 | /* SSC divider ids */ | |
42 | #define ATMEL_SSC_CMR_DIV 0 /* MCK divider for BCLK */ | |
43 | #define ATMEL_SSC_TCMR_PERIOD 1 /* BCLK divider for transmit FS */ | |
44 | #define ATMEL_SSC_RCMR_PERIOD 2 /* BCLK divider for receive FS */ | |
45 | /* | |
46 | * SSC direction masks | |
47 | */ | |
48 | #define SSC_DIR_MASK_UNUSED 0 | |
49 | #define SSC_DIR_MASK_PLAYBACK 1 | |
50 | #define SSC_DIR_MASK_CAPTURE 2 | |
51 | ||
52 | /* | |
53 | * SSC register values that Atmel left out of <linux/atmel-ssc.h>. These | |
54 | * are expected to be used with SSC_BF | |
55 | */ | |
56 | /* START bit field values */ | |
57 | #define SSC_START_CONTINUOUS 0 | |
58 | #define SSC_START_TX_RX 1 | |
59 | #define SSC_START_LOW_RF 2 | |
60 | #define SSC_START_HIGH_RF 3 | |
61 | #define SSC_START_FALLING_RF 4 | |
62 | #define SSC_START_RISING_RF 5 | |
63 | #define SSC_START_LEVEL_RF 6 | |
64 | #define SSC_START_EDGE_RF 7 | |
65 | #define SSS_START_COMPARE_0 8 | |
66 | ||
67 | /* CKI bit field values */ | |
68 | #define SSC_CKI_FALLING 0 | |
69 | #define SSC_CKI_RISING 1 | |
70 | ||
71 | /* CKO bit field values */ | |
72 | #define SSC_CKO_NONE 0 | |
73 | #define SSC_CKO_CONTINUOUS 1 | |
74 | #define SSC_CKO_TRANSFER 2 | |
75 | ||
76 | /* CKS bit field values */ | |
77 | #define SSC_CKS_DIV 0 | |
78 | #define SSC_CKS_CLOCK 1 | |
79 | #define SSC_CKS_PIN 2 | |
80 | ||
81 | /* FSEDGE bit field values */ | |
82 | #define SSC_FSEDGE_POSITIVE 0 | |
83 | #define SSC_FSEDGE_NEGATIVE 1 | |
84 | ||
85 | /* FSOS bit field values */ | |
86 | #define SSC_FSOS_NONE 0 | |
87 | #define SSC_FSOS_NEGATIVE 1 | |
88 | #define SSC_FSOS_POSITIVE 2 | |
89 | #define SSC_FSOS_LOW 3 | |
90 | #define SSC_FSOS_HIGH 4 | |
91 | #define SSC_FSOS_TOGGLE 5 | |
92 | ||
93 | #define START_DELAY 1 | |
94 | ||
95 | struct atmel_ssc_state { | |
96 | u32 ssc_cmr; | |
97 | u32 ssc_rcmr; | |
98 | u32 ssc_rfmr; | |
99 | u32 ssc_tcmr; | |
100 | u32 ssc_tfmr; | |
101 | u32 ssc_sr; | |
102 | u32 ssc_imr; | |
103 | }; | |
104 | ||
105 | ||
106 | struct atmel_ssc_info { | |
107 | char *name; | |
108 | struct ssc_device *ssc; | |
109 | spinlock_t lock; /* lock for dir_mask */ | |
110 | unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */ | |
111 | unsigned short initialized; /* true if SSC has been initialized */ | |
112 | unsigned short daifmt; | |
113 | unsigned short cmr_div; | |
114 | unsigned short tcmr_period; | |
115 | unsigned short rcmr_period; | |
116 | struct atmel_pcm_dma_params *dma_params[2]; | |
117 | struct atmel_ssc_state ssc_state; | |
b6d6c6e9 | 118 | unsigned long mck_rate; |
6c742509 | 119 | }; |
6c742509 | 120 | |
be681a82 BS |
121 | int atmel_ssc_set_audio(int ssc_id); |
122 | void atmel_ssc_put_audio(int ssc_id); | |
abfa4eae | 123 | |
6c742509 | 124 | #endif /* _AT91_SSC_DAI_H */ |