FreeBSD/Linux Kernel Cross Reference
sys/arm/ti/ti_sdma.h

     /*-
      * Copyright (c) 2011
      *      Ben Gray <ben.r.gray@gmail.com>.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD: releng/10.0/sys/arm/ti/ti_sdma.h 239281 2012-08-15 06:31:32Z gonzo $
     */
    
    /**
     * sDMA device driver interface for the TI SoC
     *
     * See the ti_sdma.c file for implementation details.
     *
     * Reference:
     *  OMAP35x Applications Processor
     *   Technical Reference Manual
     *  (omap35xx_techref.pdf)
     */
    #ifndef _TI_DMA_H_
    #define _TI_DMA_H_
    
    #define TI_SDMA_ENDIAN_BIG          0x1
    #define TI_SDMA_ENDIAN_LITTLE       0x0
    
    #define TI_SDMA_BURST_NONE          0x0
    #define TI_SDMA_BURST_16            0x1
    #define TI_SDMA_BURST_32            0x2
    #define TI_SDMA_BURST_64            0x3
    
    #define TI_SDMA_DATA_8BITS_SCALAR   0x0
    #define TI_SDMA_DATA_16BITS_SCALAR  0x1
    #define TI_SDMA_DATA_32BITS_SCALAR  0x2
    
    #define TI_SDMA_ADDR_CONSTANT       0x0
    #define TI_SDMA_ADDR_POST_INCREMENT 0x1
    #define TI_SDMA_ADDR_SINGLE_INDEX   0x2
    #define TI_SDMA_ADDR_DOUBLE_INDEX   0x3
    
    /**
     * Status flags for the DMA callback
     *
     */
    #define TI_SDMA_STATUS_DROP                  (1UL << 1)
    #define TI_SDMA_STATUS_HALF                  (1UL << 2)
    #define TI_SDMA_STATUS_FRAME                 (1UL << 3)
    #define TI_SDMA_STATUS_LAST                  (1UL << 4)
    #define TI_SDMA_STATUS_BLOCK                 (1UL << 5)
    #define TI_SDMA_STATUS_SYNC                  (1UL << 6)
    #define TI_SDMA_STATUS_PKT                   (1UL << 7)
    #define TI_SDMA_STATUS_TRANS_ERR             (1UL << 8)
    #define TI_SDMA_STATUS_SECURE_ERR            (1UL << 9)
    #define TI_SDMA_STATUS_SUPERVISOR_ERR        (1UL << 10)
    #define TI_SDMA_STATUS_MISALIGNED_ADRS_ERR   (1UL << 11)
    #define TI_SDMA_STATUS_DRAIN_END             (1UL << 12)
    
    #define TI_SDMA_SYNC_FRAME                   (1UL << 0)
    #define TI_SDMA_SYNC_BLOCK                   (1UL << 1)
    #define TI_SDMA_SYNC_PACKET                  (TI_SDMA_SYNC_FRAME | TI_SDMA_SYNC_BLOCK)
    #define TI_SDMA_SYNC_TRIG_ON_SRC             (1UL << 8)
    #define TI_SDMA_SYNC_TRIG_ON_DST             (1UL << 9)
    
    #define TI_SDMA_IRQ_FLAG_DROP                (1UL << 1)
    #define TI_SDMA_IRQ_FLAG_HALF_FRAME_COMPL    (1UL << 2)
    #define TI_SDMA_IRQ_FLAG_FRAME_COMPL         (1UL << 3)
    #define TI_SDMA_IRQ_FLAG_START_LAST_FRAME    (1UL << 4)
    #define TI_SDMA_IRQ_FLAG_BLOCK_COMPL         (1UL << 5)
    #define TI_SDMA_IRQ_FLAG_ENDOF_PKT           (1UL << 7)
    #define TI_SDMA_IRQ_FLAG_DRAIN               (1UL << 12)
    
    int ti_sdma_activate_channel(unsigned int *ch,
        void (*callback)(unsigned int ch, uint32_t status, void *data), void *data);
    int ti_sdma_deactivate_channel(unsigned int ch);
    int ti_sdma_start_xfer(unsigned int ch, unsigned int src_paddr,
        unsigned long dst_paddr, unsigned int frmcnt, unsigned int elmcnt);
    int ti_sdma_start_xfer_packet(unsigned int ch, unsigned int src_paddr,
        unsigned long dst_paddr, unsigned int frmcnt, unsigned int elmcnt, 
        unsigned int pktsize);
    int ti_sdma_stop_xfer(unsigned int ch);
   int ti_sdma_enable_channel_irq(unsigned int ch, uint32_t flags);
   int ti_sdma_disable_channel_irq(unsigned int ch);
   int ti_sdma_get_channel_status(unsigned int ch, uint32_t *status);
   int ti_sdma_set_xfer_endianess(unsigned int ch, unsigned int src, unsigned int dst);
   int ti_sdma_set_xfer_burst(unsigned int ch, unsigned int src, unsigned int dst);
   int ti_sdma_set_xfer_data_type(unsigned int ch, unsigned int type);
   int ti_sdma_set_callback(unsigned int ch,
       void (*callback)(unsigned int ch, uint32_t status, void *data), void *data);
   int ti_sdma_sync_params(unsigned int ch, unsigned int trigger, unsigned int mode);
   int ti_sdma_set_addr_mode(unsigned int ch, unsigned int src_mode, unsigned int dst_mode);
   
   #endif /* _TI_SDMA_H_ */

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