2 * atmel_ssc_dai.h - ALSA SSC interface for the Atmel SoC
4 * Copyright (C) 2005 SAN People
5 * Copyright (C) 2008 Atmel
7 * Author: Sedji Gaouaou <sedji.gaouaou@atmel.com>
10 * Based on at91-ssc.c by
11 * Frank Mandarino <fmandarino@endrelia.com>
12 * Based on pxa2xx Platform drivers by
13 * Liam Girdwood <lrg@slimlogic.co.uk>
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.
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.
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
30 #ifndef _ATMEL_SSC_DAI_H
31 #define _ATMEL_SSC_DAI_H
33 #include <linux/types.h>
34 #include <linux/atmel-ssc.h>
36 #include "atmel-pcm.h"
38 /* SSC system clock ids */
39 #define ATMEL_SYSCLK_MCK 0 /* SSC uses AT91 MCK as system clock */
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 */
48 #define SSC_DIR_MASK_UNUSED 0
49 #define SSC_DIR_MASK_PLAYBACK 1
50 #define SSC_DIR_MASK_CAPTURE 2
53 * SSC register values that Atmel left out of <linux/atmel-ssc.h>. These
54 * are expected to be used with SSC_BF
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
67 /* CKI bit field values */
68 #define SSC_CKI_FALLING 0
69 #define SSC_CKI_RISING 1
71 /* CKO bit field values */
72 #define SSC_CKO_NONE 0
73 #define SSC_CKO_CONTINUOUS 1
74 #define SSC_CKO_TRANSFER 2
76 /* CKS bit field values */
78 #define SSC_CKS_CLOCK 1
81 /* FSEDGE bit field values */
82 #define SSC_FSEDGE_POSITIVE 0
83 #define SSC_FSEDGE_NEGATIVE 1
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
95 struct atmel_ssc_state {
106 struct atmel_ssc_info {
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;
119 extern struct snd_soc_dai atmel_ssc_dai[];
121 #endif /* _AT91_SSC_DAI_H */