sound/soc/blackfin/bf5xx-sport.h

   1 /*
   2  * File:         bf5xx_ac97_sport.h
   3  * Based on:
   4  * Author:       Roy Huang <roy.huang@analog.com>
   5  *
   6  * Created:
   7  * Description:
   8  *
   9  *               Copyright 2004-2007 Analog Devices Inc.
  10  *
  11  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, see the file COPYING, or write
  25  * to the Free Software Foundation, Inc.,
  26  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  27  */
  28
  29
  30 #ifndef __BF5XX_SPORT_H__
  31 #define __BF5XX_SPORT_H__
  32
  33 #include <linux/types.h>
  34 #include <linux/wait.h>
  35 #include <linux/workqueue.h>
  36 #include <asm/dma.h>
  37 #include <asm/bfin_sport.h>
  38
  39 #define DESC_ELEMENT_COUNT 9
  40
  41 struct sport_device {
  42         int dma_rx_chan;
  43         int dma_tx_chan;
  44         int err_irq;
  45         struct sport_register *regs;
  46
  47         unsigned char *rx_buf;
  48         unsigned char *tx_buf;
  49         unsigned int rx_fragsize;
  50         unsigned int tx_fragsize;
  51         unsigned int rx_frags;
  52         unsigned int tx_frags;
  53         unsigned int wdsize;
  54
  55         /* for dummy dma transfer */
  56         void *dummy_buf;
  57         unsigned int dummy_count;
  58
  59         /* DMA descriptor ring head of current audio stream*/
  60         struct dmasg *dma_rx_desc;
  61         struct dmasg *dma_tx_desc;
  62         unsigned int rx_desc_bytes;
  63         unsigned int tx_desc_bytes;
  64
  65         unsigned int rx_run:1; /* rx is running */
  66         unsigned int tx_run:1; /* tx is running */
  67
  68         struct dmasg *dummy_rx_desc;
  69         struct dmasg *dummy_tx_desc;
  70
  71         struct dmasg *curr_rx_desc;
  72         struct dmasg *curr_tx_desc;
  73
  74         int rx_curr_frag;
  75         int tx_curr_frag;
  76
  77         unsigned int rcr1;
  78         unsigned int rcr2;
  79         int rx_tdm_count;
  80
  81         unsigned int tcr1;
  82         unsigned int tcr2;
  83         int tx_tdm_count;
  84
  85         void (*rx_callback)(void *data);
  86         void *rx_data;
  87         void (*tx_callback)(void *data);
  88         void *tx_data;
  89         void (*err_callback)(void *data);
  90         void *err_data;
  91         unsigned char *tx_dma_buf;
  92         unsigned char *rx_dma_buf;
  93 #ifdef CONFIG_SND_BF5XX_MMAP_SUPPORT
  94         dma_addr_t tx_dma_phy;
  95         dma_addr_t rx_dma_phy;
  96         int tx_pos;/*pcm sample count*/
  97         int rx_pos;
  98         unsigned int tx_buffer_size;
  99         unsigned int rx_buffer_size;
 100         int tx_delay_pos;
 101         int once;
 102 #endif
 103         void *private_data;
 104 };
 105
 106 extern struct sport_device *sport_handle;
 107
 108 struct sport_param {
 109         int dma_rx_chan;
 110         int dma_tx_chan;
 111         int err_irq;
 112         struct sport_register *regs;
 113 };
 114
 115 struct sport_device *sport_init(struct sport_param *param, unsigned wdsize,
 116                 unsigned dummy_count, void *private_data);
 117
 118 void sport_done(struct sport_device *sport);
 119
 120 /* first use these ...*/
 121
 122 /* note: multichannel is in units of 8 channels, tdm_count is number of channels
 123  *  NOT / 8 ! all channels are enabled by default */
 124 int sport_set_multichannel(struct sport_device *sport, int tdm_count,
 125                 u32 mask, int packed);
 126
 127 int sport_config_rx(struct sport_device *sport,
 128                 unsigned int rcr1, unsigned int rcr2,
 129                 unsigned int clkdiv, unsigned int fsdiv);
 130
 131 int sport_config_tx(struct sport_device *sport,
 132                 unsigned int tcr1, unsigned int tcr2,
 133                 unsigned int clkdiv, unsigned int fsdiv);
 134
 135 /* ... then these: */
 136
 137 /* buffer size (in bytes) == fragcount * fragsize_bytes */
 138
 139 /* this is not a very general api, it sets the dma to 2d autobuffer mode */
 140
 141 int sport_config_rx_dma(struct sport_device *sport, void *buf,
 142                 int fragcount, size_t fragsize_bytes);
 143
 144 int sport_config_tx_dma(struct sport_device *sport, void *buf,
 145                 int fragcount, size_t fragsize_bytes);
 146
 147 int sport_tx_start(struct sport_device *sport);
 148 int sport_tx_stop(struct sport_device *sport);
 149 int sport_rx_start(struct sport_device *sport);
 150 int sport_rx_stop(struct sport_device *sport);
 151
 152 /* for use in interrupt handler */
 153 unsigned long sport_curr_offset_rx(struct sport_device *sport);
 154 unsigned long sport_curr_offset_tx(struct sport_device *sport);
 155
 156 void sport_incfrag(struct sport_device *sport, int *frag, int tx);
 157 void sport_decfrag(struct sport_device *sport, int *frag, int tx);
 158
 159 int sport_set_rx_callback(struct sport_device *sport,
 160                        void (*rx_callback)(void *), void *rx_data);
 161 int sport_set_tx_callback(struct sport_device *sport,
 162                        void (*tx_callback)(void *), void *tx_data);
 163 int sport_set_err_callback(struct sport_device *sport,
 164                        void (*err_callback)(void *), void *err_data);
 165
 166 int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
 167                 u8 *in_data, int len);
 168 #endif /* BF53X_SPORT_H */