/* * Renesas SuperH DMA Engine support * * Copyright (C) 2013 Renesas Electronics, Inc. * * This is free software; you can redistribute it and/or modify it under the * terms of version 2 the GNU General Public License as published by the Free * Software Foundation. */ #ifndef SHDMA_ARM_H #define SHDMA_ARM_H #include "shdma.h" /* Transmit sizes and respective CHCR register values */ enum { XMIT_SZ_8BIT = 0, XMIT_SZ_16BIT = 1, XMIT_SZ_32BIT = 2, XMIT_SZ_64BIT = 7, XMIT_SZ_128BIT = 3, XMIT_SZ_256BIT = 4, XMIT_SZ_512BIT = 5, }; /* log2(size / 8) - used to calculate number of transfers */ #define SH_DMAE_TS_SHIFT { \ [XMIT_SZ_8BIT] = 0, \ [XMIT_SZ_16BIT] = 1, \ [XMIT_SZ_32BIT] = 2, \ [XMIT_SZ_64BIT] = 3, \ [XMIT_SZ_128BIT] = 4, \ [XMIT_SZ_256BIT] = 5, \ [XMIT_SZ_512BIT] = 6, \ } #define TS_LOW_BIT 0x3 /* --xx */ #define TS_HI_BIT 0xc /* xx-- */ #define TS_LOW_SHIFT (3) #define TS_HI_SHIFT (20 - 2) /* 2 bits for shifted low TS */ #define TS_INDEX2VAL(i) \ ((((i) & TS_LOW_BIT) << TS_LOW_SHIFT) |\ (((i) & TS_HI_BIT) << TS_HI_SHIFT)) #define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL((xmit_sz))) #define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL((xmit_sz))) #endif