sound/soc/blackfin/bf6xx-sport.h

   1 /*
   2  * bf6xx_sport - Analog Devices BF6XX SPORT driver
   3  *
   4  * Copyright (c) 2012 Analog Devices Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #ifndef _BF6XX_SPORT_H_
  21 #define _BF6XX_SPORT_H_
  22
  23 #include <linux/platform_device.h>
  24 #include <asm/bfin_sport3.h>
  25
  26 struct sport_device {
  27         struct platform_device *pdev;
  28         const unsigned short *pin_req;
  29         struct sport_register *tx_regs;
  30         struct sport_register *rx_regs;
  31         int tx_dma_chan;
  32         int rx_dma_chan;
  33         int tx_err_irq;
  34         int rx_err_irq;
  35
  36         void (*tx_callback)(void *data);
  37         void *tx_data;
  38         void (*rx_callback)(void *data);
  39         void *rx_data;
  40
  41         struct dmasg *tx_desc;
  42         struct dmasg *rx_desc;
  43         unsigned int tx_desc_size;
  44         unsigned int rx_desc_size;
  45         unsigned char *tx_buf;
  46         unsigned char *rx_buf;
  47         unsigned int tx_fragsize;
  48         unsigned int rx_fragsize;
  49         unsigned int tx_frags;
  50         unsigned int rx_frags;
  51         unsigned int wdsize;
  52 };
  53
  54 struct sport_params {
  55         u32 spctl;
  56         u32 div;
  57 };
  58
  59 struct sport_device *sport_create(struct platform_device *pdev);
  60 void sport_delete(struct sport_device *sport);
  61 int sport_set_tx_params(struct sport_device *sport,
  62                 struct sport_params *params);
  63 int sport_set_rx_params(struct sport_device *sport,
  64                 struct sport_params *params);
  65 void sport_tx_start(struct sport_device *sport);
  66 void sport_rx_start(struct sport_device *sport);
  67 void sport_tx_stop(struct sport_device *sport);
  68 void sport_rx_stop(struct sport_device *sport);
  69 void sport_set_tx_callback(struct sport_device *sport,
  70         void (*tx_callback)(void *), void *tx_data);
  71 void sport_set_rx_callback(struct sport_device *sport,
  72         void (*rx_callback)(void *), void *rx_data);
  73 int sport_config_tx_dma(struct sport_device *sport, void *buf,
  74         int fragcount, size_t fragsize);
  75 int sport_config_rx_dma(struct sport_device *sport, void *buf,
  76         int fragcount, size_t fragsize);
  77 unsigned long sport_curr_offset_tx(struct sport_device *sport);
  78 unsigned long sport_curr_offset_rx(struct sport_device *sport);
  79
  80
  81
  82 #endif