arch/mips/include/asm/mach-jz4740/dma.h

   1 /*
   2  *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
   3  *  JZ7420/JZ4740 DMA definitions
   4  *
   5  *  This program is free software; you can redistribute it and/or modify it
   6  *  under  the terms of the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the License, or (at your
   8  *  option) any later version.
   9  *
  10  *  You should have received a copy of the GNU General Public License along
  11  *  with this program; if not, write to the Free Software Foundation, Inc.,
  12  *  675 Mass Ave, Cambridge, MA 02139, USA.
  13  *
  14  */
  15
  16 #ifndef __ASM_MACH_JZ4740_DMA_H__
  17 #define __ASM_MACH_JZ4740_DMA_H__
  18
  19 struct jz4740_dma_chan;
  20
  21 enum jz4740_dma_request_type {
  22         JZ4740_DMA_TYPE_AUTO_REQUEST    = 8,
  23         JZ4740_DMA_TYPE_UART_TRANSMIT   = 20,
  24         JZ4740_DMA_TYPE_UART_RECEIVE    = 21,
  25         JZ4740_DMA_TYPE_SPI_TRANSMIT    = 22,
  26         JZ4740_DMA_TYPE_SPI_RECEIVE     = 23,
  27         JZ4740_DMA_TYPE_AIC_TRANSMIT    = 24,
  28         JZ4740_DMA_TYPE_AIC_RECEIVE     = 25,
  29         JZ4740_DMA_TYPE_MMC_TRANSMIT    = 26,
  30         JZ4740_DMA_TYPE_MMC_RECEIVE     = 27,
  31         JZ4740_DMA_TYPE_TCU             = 28,
  32         JZ4740_DMA_TYPE_SADC            = 29,
  33         JZ4740_DMA_TYPE_SLCD            = 30,
  34 };
  35
  36 enum jz4740_dma_width {
  37         JZ4740_DMA_WIDTH_32BIT  = 0,
  38         JZ4740_DMA_WIDTH_8BIT   = 1,
  39         JZ4740_DMA_WIDTH_16BIT  = 2,
  40 };
  41
  42 enum jz4740_dma_transfer_size {
  43         JZ4740_DMA_TRANSFER_SIZE_4BYTE  = 0,
  44         JZ4740_DMA_TRANSFER_SIZE_1BYTE  = 1,
  45         JZ4740_DMA_TRANSFER_SIZE_2BYTE  = 2,
  46         JZ4740_DMA_TRANSFER_SIZE_16BYTE = 3,
  47         JZ4740_DMA_TRANSFER_SIZE_32BYTE = 4,
  48 };
  49
  50 enum jz4740_dma_flags {
  51         JZ4740_DMA_SRC_AUTOINC = 0x2,
  52         JZ4740_DMA_DST_AUTOINC = 0x1,
  53 };
  54
  55 enum jz4740_dma_mode {
  56         JZ4740_DMA_MODE_SINGLE  = 0,
  57         JZ4740_DMA_MODE_BLOCK   = 1,
  58 };
  59
  60 struct jz4740_dma_config {
  61         enum jz4740_dma_width src_width;
  62         enum jz4740_dma_width dst_width;
  63         enum jz4740_dma_transfer_size transfer_size;
  64         enum jz4740_dma_request_type request_type;
  65         enum jz4740_dma_flags flags;
  66         enum jz4740_dma_mode mode;
  67 };
  68
  69 typedef void (*jz4740_dma_complete_callback_t)(struct jz4740_dma_chan *, int, void *);
  70
  71 struct jz4740_dma_chan *jz4740_dma_request(void *dev, const char *name);
  72 void jz4740_dma_free(struct jz4740_dma_chan *dma);
  73
  74 void jz4740_dma_configure(struct jz4740_dma_chan *dma,
  75         const struct jz4740_dma_config *config);
  76
  77
  78 void jz4740_dma_enable(struct jz4740_dma_chan *dma);
  79 void jz4740_dma_disable(struct jz4740_dma_chan *dma);
  80
  81 void jz4740_dma_set_src_addr(struct jz4740_dma_chan *dma, dma_addr_t src);
  82 void jz4740_dma_set_dst_addr(struct jz4740_dma_chan *dma, dma_addr_t dst);
  83 void jz4740_dma_set_transfer_count(struct jz4740_dma_chan *dma, uint32_t count);
  84
  85 uint32_t jz4740_dma_get_residue(const struct jz4740_dma_chan *dma);
  86
  87 void jz4740_dma_set_complete_cb(struct jz4740_dma_chan *dma,
  88         jz4740_dma_complete_callback_t cb);
  89
  90 #endif  /* __ASM_JZ4740_DMA_H__ */