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gerrit-public.fairphone.software / kernel / msm-4.9 / 246c541822cd6251aa38862f8f13412e5147a1ad / . / sound / soc / atmel / atmel_ssc_dai.h
blob: a828746e8a2f31f58e9df59f25db9c29961a99b3 [file] [log] [blame]
Sedji Gaouaou6c742502008-10-03 16:57:50 +0200[diff] [blame]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
13 * Liam Girdwood <liam.girdwood@wolfsonmicro.com>
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
95struct 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
106struct 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;
118};
119extern struct snd_soc_dai atmel_ssc_dai[];
120
121#endif /* _AT91_SSC_DAI_H */