LXR linux/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
  38struct 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
  67struct 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_BF5XX_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        int tx_delay_pos;
 127        int once;
 128#endif
 129        void *private_data;
 130};
 131
 132extern struct sport_device *sport_handle;
 133
 134struct sport_param {
 135        int dma_rx_chan;
 136        int dma_tx_chan;
 137        int err_irq;
 138        struct sport_register *regs;
 139};
 140
 141struct sport_device *sport_init(struct sport_param *param, unsigned wdsize,
 142                unsigned dummy_count, void *private_data);
 143
 144void sport_done(struct sport_device *sport);
 145
 146/* first use these ...*/
 147
 148/* note: multichannel is in units of 8 channels, tdm_count is number of channels
 149 *  NOT / 8 ! all channels are enabled by default */
 150int sport_set_multichannel(struct sport_device *sport, int tdm_count,
 151                u32 mask, int packed);
 152
 153int sport_config_rx(struct sport_device *sport,
 154                unsigned int rcr1, unsigned int rcr2,
 155                unsigned int clkdiv, unsigned int fsdiv);
 156
 157int sport_config_tx(struct sport_device *sport,
 158                unsigned int tcr1, unsigned int tcr2,
 159                unsigned int clkdiv, unsigned int fsdiv);
 160
 161/* ... then these: */
 162
 163/* buffer size (in bytes) == fragcount * fragsize_bytes */
 164
 165/* this is not a very general api, it sets the dma to 2d autobuffer mode */
 166
 167int sport_config_rx_dma(struct sport_device *sport, void *buf,
 168                int fragcount, size_t fragsize_bytes);
 169
 170int sport_config_tx_dma(struct sport_device *sport, void *buf,
 171                int fragcount, size_t fragsize_bytes);
 172
 173int sport_tx_start(struct sport_device *sport);
 174int sport_tx_stop(struct sport_device *sport);
 175int sport_rx_start(struct sport_device *sport);
 176int sport_rx_stop(struct sport_device *sport);
 177
 178/* for use in interrupt handler */
 179unsigned long sport_curr_offset_rx(struct sport_device *sport);
 180unsigned long sport_curr_offset_tx(struct sport_device *sport);
 181
 182void sport_incfrag(struct sport_device *sport, int *frag, int tx);
 183void sport_decfrag(struct sport_device *sport, int *frag, int tx);
 184
 185int sport_set_rx_callback(struct sport_device *sport,
 186                       void (*rx_callback)(void *), void *rx_data);
 187int sport_set_tx_callback(struct sport_device *sport,
 188                       void (*tx_callback)(void *), void *tx_data);
 189int sport_set_err_callback(struct sport_device *sport,
 190                       void (*err_callback)(void *), void *err_data);
 191
 192int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
 193                u8 *in_data, int len);
 194#endif /* BF53X_SPORT_H */
 195