sound/soc/blackfin/bf5xx-sport.h

   1 /*
   2  * File:         bf5xx_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 <linux/platform_device.h>
  37 #include <asm/dma.h>
  38 #include <asm/bfin_sport.h>
  39
  40 #define DESC_ELEMENT_COUNT 9
  41
  42 struct sport_device {
  43         int num;
  44         int dma_rx_chan;
  45         int dma_tx_chan;
  46         int err_irq;
  47         const unsigned short *pin_req;
  48         struct sport_register *regs;
  49
  50         unsigned char *rx_buf;
  51         unsigned char *tx_buf;
  52         unsigned int rx_fragsize;
  53         unsigned int tx_fragsize;
  54         unsigned int rx_frags;
  55         unsigned int tx_frags;
  56         unsigned int wdsize;
  57
  58         /* for dummy dma transfer */
  59         void *dummy_buf;
  60         unsigned int dummy_count;
  61
  62         /* DMA descriptor ring head of current audio stream*/
  63         struct dmasg *dma_rx_desc;
  64         struct dmasg *dma_tx_desc;
  65         unsigned int rx_desc_bytes;
  66         unsigned int tx_desc_bytes;
  67
  68         unsigned int rx_run:1; /* rx is running */
  69         unsigned int tx_run:1; /* tx is running */
  70
  71         struct dmasg *dummy_rx_desc;
  72         struct dmasg *dummy_tx_desc;
  73
  74         struct dmasg *curr_rx_desc;
  75         struct dmasg *curr_tx_desc;
  76
  77         int rx_curr_frag;
  78         int tx_curr_frag;
  79
  80         unsigned int rcr1;
  81         unsigned int rcr2;
  82         int rx_tdm_count;
  83
  84         unsigned int tcr1;
  85         unsigned int tcr2;
  86         int tx_tdm_count;
  87
  88         void (*rx_callback)(void *data);
  89         void *rx_data;
  90         void (*tx_callback)(void *data);
  91         void *tx_data;
  92         void (*err_callback)(void *data);
  93         void *err_data;
  94         unsigned char *tx_dma_buf;
  95         unsigned char *rx_dma_buf;
  96 #ifdef CONFIG_SND_BF5XX_MMAP_SUPPORT
  97         dma_addr_t tx_dma_phy;
  98         dma_addr_t rx_dma_phy;
  99         int tx_pos;/*pcm sample count*/
 100         int rx_pos;
 101         unsigned int tx_buffer_size;
 102         unsigned int rx_buffer_size;
 103         int tx_delay_pos;
 104         int once;
 105 #endif
 106         void *private_data;
 107 };
 108
 109 struct sport_param {
 110         int num;
 111         int dma_rx_chan;
 112         int dma_tx_chan;
 113         int err_irq;
 114         const unsigned short *pin_req;
 115         struct sport_register *regs;
 116         unsigned int wdsize;
 117         unsigned int dummy_count;
 118         void *private_data;
 119 };
 120
 121 struct sport_device *sport_init(struct platform_device *pdev,
 122         unsigned int wdsize, unsigned int dummy_count, size_t priv_size);
 123
 124 void sport_done(struct sport_device *sport);
 125
 126 /* first use these ...*/
 127
 128 /* note: multichannel is in units of 8 channels, tdm_count is number of channels
 129  *  NOT / 8 ! all channels are enabled by default */
 130 int sport_set_multichannel(struct sport_device *sport, int tdm_count,
 131                 u32 tx_mask, u32 rx_mask, int packed);
 132
 133 int sport_config_rx(struct sport_device *sport,
 134                 unsigned int rcr1, unsigned int rcr2,
 135                 unsigned int clkdiv, unsigned int fsdiv);
 136
 137 int sport_config_tx(struct sport_device *sport,
 138                 unsigned int tcr1, unsigned int tcr2,
 139                 unsigned int clkdiv, unsigned int fsdiv);
 140
 141 /* ... then these: */
 142
 143 /* buffer size (in bytes) == fragcount * fragsize_bytes */
 144
 145 /* this is not a very general api, it sets the dma to 2d autobuffer mode */
 146
 147 int sport_config_rx_dma(struct sport_device *sport, void *buf,
 148                 int fragcount, size_t fragsize_bytes);
 149
 150 int sport_config_tx_dma(struct sport_device *sport, void *buf,
 151                 int fragcount, size_t fragsize_bytes);
 152
 153 int sport_tx_start(struct sport_device *sport);
 154 int sport_tx_stop(struct sport_device *sport);
 155 int sport_rx_start(struct sport_device *sport);
 156 int sport_rx_stop(struct sport_device *sport);
 157
 158 /* for use in interrupt handler */
 159 unsigned long sport_curr_offset_rx(struct sport_device *sport);
 160 unsigned long sport_curr_offset_tx(struct sport_device *sport);
 161
 162 void sport_incfrag(struct sport_device *sport, int *frag, int tx);
 163 void sport_decfrag(struct sport_device *sport, int *frag, int tx);
 164
 165 int sport_set_rx_callback(struct sport_device *sport,
 166                        void (*rx_callback)(void *), void *rx_data);
 167 int sport_set_tx_callback(struct sport_device *sport,
 168                        void (*tx_callback)(void *), void *tx_data);
 169 int sport_set_err_callback(struct sport_device *sport,
 170                        void (*err_callback)(void *), void *err_data);
 171
 172 int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
 173                 u8 *in_data, int len);
 174 #endif /* BF53X_SPORT_H */