firmware/target/arm/as3525/ascodec-target.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Driver for AS3514 audio codec
  11  *
  12  * Copyright (c) 2007 Daniel Ankers
  13  * Copyright (c) 2007 Christian Gmeiner
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24
  25 #ifndef _ASCODEC_TARGET_H
  26 #define _ASCODEC_TARGET_H
  27
  28 #ifndef SIMULATOR
  29
  30 #include "as3514.h"
  31 #include "kernel.h"       /* for struct wakeup */
  32 #include "clock-target.h" /* for AS3525_I2C_PRESCALER */
  33 #include "system-arm.h"
  34
  35 /*  Charge Pump and Power management Settings  */
  36 #define AS314_CP_DCDC3_SETTING    \
  37                ((0<<7) |  /* CP_SW  Auto-Switch Margin 0=200/300 1=150/255 */  \
  38                 (0<<6) |  /* CP_on  0=Normal op 1=Chg Pump Always On  */       \
  39                 (0<<5) |  /* LREG_CPnot  Always write 0 */                     \
  40                 (0<<3) |  /* DCDC3p  BVDD setting 3.6/3.2/3.1/3.0  */          \
  41                 (1<<2) |  /* LREG_off 1=Auto mode switching 0=Length Reg only*/\
  42                 (0<<0) )  /* CVDDp  Core Voltage Setting 1.2/1.15/1.10/1.05*/
  43
  44 #define CVDD_1_20          0
  45 #define CVDD_1_15          1
  46 #define CVDD_1_10          2
  47 #define CVDD_1_05          3
  48
  49 #define ASCODEC_REQ_READ   0
  50 #define ASCODEC_REQ_WRITE  1
  51
  52 /*
  53  * How many bytes we using in struct ascodec_request for the data buffer.
  54  * 4 fits the alignment best right now.
  55  * We don't actually use more than 2 at the moment (in adc_read).
  56  * Upper limit would be 255 since DACNT is 8 bits!
  57  */
  58 #define ASCODEC_REQ_MAXLEN 4
  59
  60 typedef void (ascodec_cb_fn)(unsigned const char *data, unsigned cnt);
  61
  62 struct ascodec_request {
  63     unsigned char type;
  64     unsigned char index;
  65     unsigned char status;
  66     unsigned char cnt;
  67     unsigned char data[ASCODEC_REQ_MAXLEN];
  68     struct wakeup wkup;
  69     ascodec_cb_fn *callback;
  70     struct ascodec_request *next;
  71 };
  72
  73 void ascodec_init(void);
  74
  75 int ascodec_write(unsigned int index, unsigned int value);
  76
  77 #if CONFIG_CPU == AS3525v2
  78 static inline void ascodec_write_pmu(unsigned int index, unsigned int subreg,
  79                                      unsigned int value)
  80 {
  81     /* we disable interrupts to make sure no operation happen on the i2c bus
  82      * between selecting the sub register and writing to it */
  83     int oldstatus = disable_irq_save();
  84     ascodec_write(AS3543_PMU_ENABLE, 8|subreg);
  85     ascodec_write(index, value);
  86     restore_irq(oldstatus);
  87 }
  88 #endif
  89
  90 int ascodec_read(unsigned int index);
  91
  92 int ascodec_readbytes(unsigned int index, unsigned int len, unsigned char *data);
  93
  94 /*
  95  * The request struct passed in must be allocated statically.
  96  * If you call ascodec_async_write from different places, each
  97  * call needs it's own request struct.
  98  * This comment is duplicated in .c and .h for your convenience.
  99  */
 100 void ascodec_async_write(unsigned index, unsigned int value, struct ascodec_request *req);
 101
 102 /*
 103  * The request struct passed in must be allocated statically.
 104  * If you call ascodec_async_read from different places, each
 105  * call needs it's own request struct.
 106  * If len is bigger than ASCODEC_REQ_MAXLEN it will be
 107  * set to ASCODEC_REQ_MAXLEN.
 108  * This comment is duplicated in .c and .h for your convenience.
 109  */
 110 void ascodec_async_read(unsigned index, unsigned int len,
 111                         struct ascodec_request *req, ascodec_cb_fn *cb);
 112
 113 void ascodec_req_init(struct ascodec_request *req, int type,
 114                       unsigned int index, unsigned int cnt);
 115
 116 void ascodec_submit(struct ascodec_request *req);
 117
 118 void ascodec_lock(void);
 119
 120 void ascodec_unlock(void);
 121
 122 #if CONFIG_CPU == AS3525
 123 void ascodec_wait_adc_finished(void);
 124 #else
 125 static inline void ascodec_wait_adc_finished(void)
 126 {
 127     /* FIXME: Doesn't work yet on AS3525v2 */
 128 }
 129 #endif
 130
 131 void ascodec_enable_endofch_irq(void);
 132
 133 void ascodec_disable_endofch_irq(void);
 134
 135 #endif /* !SIMULATOR */
 136
 137 #endif /* !_ASCODEC_TARGET_H */