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
  38 struct sport_register {
  39         u16 tcr1;       u16 reserved0;
  40         u16 tcr2;       u16 reserved1;
  41         u16 tclkdiv;    u16 reserved2;
  42         u16 tfsdiv;     u16 reserved3;
  43         u32 tx;
  44         u32 reserved_l0;
  45         u32 rx;
  46         u32 reserved_l1;
  47         u16 rcr1;       u16 reserved4;
  48         u16 rcr2;       u16 reserved5;
  49         u16 rclkdiv;    u16 reserved6;
  50         u16 rfsdiv;     u16 reserved7;
  51         u16 stat;       u16 reserved8;
  52         u16 chnl;       u16 reserved9;
  53         u16 mcmc1;      u16 reserved10;
  54         u16 mcmc2;      u16 reserved11;
  55         u32 mtcs0;
  56         u32 mtcs1;
  57         u32 mtcs2;
  58         u32 mtcs3;
  59         u32 mrcs0;
  60         u32 mrcs1;
  61         u32 mrcs2;
  62         u32 mrcs3;
  63 };
  64
  65 #define DESC_ELEMENT_COUNT 9
  66
  67 struct sport_device {
  68         int dma_rx_chan;
  69         int dma_tx_chan;
  70         int err_irq;
  71         struct sport_register *regs;
  72
  73         unsigned char *rx_buf;
  74         unsigned char *tx_buf;
  75         unsigned int rx_fragsize;
  76         unsigned int tx_fragsize;
  77         unsigned int rx_frags;
  78         unsigned int tx_frags;
  79         unsigned int wdsize;
  80
  81         /* for dummy dma transfer */
  82         void *dummy_buf;
  83         unsigned int dummy_count;
  84
  85         /* DMA descriptor ring head of current audio stream*/
  86         struct dmasg *dma_rx_desc;
  87         struct dmasg *dma_tx_desc;
  88         unsigned int rx_desc_bytes;
  89         unsigned int tx_desc_bytes;
  90
  91         unsigned int rx_run:1; /* rx is running */
  92         unsigned int tx_run:1; /* tx is running */
  93
  94         struct dmasg *dummy_rx_desc;
  95         struct dmasg *dummy_tx_desc;
  96
  97         struct dmasg *curr_rx_desc;
  98         struct dmasg *curr_tx_desc;
  99
 100         int rx_curr_frag;
 101         int tx_curr_frag;
 102
 103         unsigned int rcr1;
 104         unsigned int rcr2;
 105         int rx_tdm_count;
 106
 107         unsigned int tcr1;
 108         unsigned int tcr2;
 109         int tx_tdm_count;
 110
 111         void (*rx_callback)(void *data);
 112         void *rx_data;
 113         void (*tx_callback)(void *data);
 114         void *tx_data;
 115         void (*err_callback)(void *data);
 116         void *err_data;
 117         unsigned char *tx_dma_buf;
 118         unsigned char *rx_dma_buf;
 119 #ifdef CONFIG_SND_MMAP_SUPPORT
 120         dma_addr_t tx_dma_phy;
 121         dma_addr_t rx_dma_phy;
 122         int tx_pos;/*pcm sample count*/
 123         int rx_pos;
 124         unsigned int tx_buffer_size;
 125         unsigned int rx_buffer_size;
 126 #endif
 127         void *private_data;
 128 };
 129
 130 extern struct sport_device *sport_handle;
 131
 132 struct sport_param {
 133         int dma_rx_chan;
 134         int dma_tx_chan;
 135         int err_irq;
 136         struct sport_register *regs;
 137 };
 138
 139 struct sport_device *sport_init(struct sport_param *param, unsigned wdsize,
 140                 unsigned dummy_count, void *private_data);
 141
 142 void sport_done(struct sport_device *sport);
 143
 144 /* first use these ...*/
 145
 146 /* note: multichannel is in units of 8 channels, tdm_count is number of channels
 147  *  NOT / 8 ! all channels are enabled by default */
 148 int sport_set_multichannel(struct sport_device *sport, int tdm_count,
 149                 u32 mask, int packed);
 150
 151 int sport_config_rx(struct sport_device *sport,
 152                 unsigned int rcr1, unsigned int rcr2,
 153                 unsigned int clkdiv, unsigned int fsdiv);
 154
 155 int sport_config_tx(struct sport_device *sport,
 156                 unsigned int tcr1, unsigned int tcr2,
 157                 unsigned int clkdiv, unsigned int fsdiv);
 158
 159 /* ... then these: */
 160
 161 /* buffer size (in bytes) == fragcount * fragsize_bytes */
 162
 163 /* this is not a very general api, it sets the dma to 2d autobuffer mode */
 164
 165 int sport_config_rx_dma(struct sport_device *sport, void *buf,
 166                 int fragcount, size_t fragsize_bytes);
 167
 168 int sport_config_tx_dma(struct sport_device *sport, void *buf,
 169                 int fragcount, size_t fragsize_bytes);
 170
 171 int sport_tx_start(struct sport_device *sport);
 172 int sport_tx_stop(struct sport_device *sport);
 173 int sport_rx_start(struct sport_device *sport);
 174 int sport_rx_stop(struct sport_device *sport);
 175
 176 /* for use in interrupt handler */
 177 unsigned long sport_curr_offset_rx(struct sport_device *sport);
 178 unsigned long sport_curr_offset_tx(struct sport_device *sport);
 179
 180 void sport_incfrag(struct sport_device *sport, int *frag, int tx);
 181 void sport_decfrag(struct sport_device *sport, int *frag, int tx);
 182
 183 int sport_set_rx_callback(struct sport_device *sport,
 184                        void (*rx_callback)(void *), void *rx_data);
 185 int sport_set_tx_callback(struct sport_device *sport,
 186                        void (*tx_callback)(void *), void *tx_data);
 187 int sport_set_err_callback(struct sport_device *sport,
 188                        void (*err_callback)(void *), void *err_data);
 189
 190 int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
 191                 u8 *in_data, int len);
 192 #endif /* BF53X_SPORT_H */