LXR linux/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
  42struct 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
 109struct 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
 121struct sport_device *sport_init(struct platform_device *pdev,
 122        unsigned int wdsize, unsigned int dummy_count, size_t priv_size);
 123
 124void 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 */
 130int sport_set_multichannel(struct sport_device *sport, int tdm_count,
 131                u32 tx_mask, u32 rx_mask, int packed);
 132
 133int sport_config_rx(struct sport_device *sport,
 134                unsigned int rcr1, unsigned int rcr2,
 135                unsigned int clkdiv, unsigned int fsdiv);
 136
 137int 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
 147int sport_config_rx_dma(struct sport_device *sport, void *buf,
 148                int fragcount, size_t fragsize_bytes);
 149
 150int sport_config_tx_dma(struct sport_device *sport, void *buf,
 151                int fragcount, size_t fragsize_bytes);
 152
 153int sport_tx_start(struct sport_device *sport);
 154int sport_tx_stop(struct sport_device *sport);
 155int sport_rx_start(struct sport_device *sport);
 156int sport_rx_stop(struct sport_device *sport);
 157
 158/* for use in interrupt handler */
 159unsigned long sport_curr_offset_rx(struct sport_device *sport);
 160unsigned long sport_curr_offset_tx(struct sport_device *sport);
 161
 162void sport_incfrag(struct sport_device *sport, int *frag, int tx);
 163void sport_decfrag(struct sport_device *sport, int *frag, int tx);
 164
 165int sport_set_rx_callback(struct sport_device *sport,
 166                       void (*rx_callback)(void *), void *rx_data);
 167int sport_set_tx_callback(struct sport_device *sport,
 168                       void (*tx_callback)(void *), void *tx_data);
 169int sport_set_err_callback(struct sport_device *sport,
 170                       void (*err_callback)(void *), void *err_data);
 171
 172int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
 173                u8 *in_data, int len);
 174#endif /* BF53X_SPORT_H */
 175