| /* |
| * 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 |