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Diffstat (limited to 'board/micronas/vct/ebi.h')
| -rw-r--r-- | board/micronas/vct/ebi.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/board/micronas/vct/ebi.h b/board/micronas/vct/ebi.h new file mode 100644 index 000000000..69456bdc9 --- /dev/null +++ b/board/micronas/vct/ebi.h @@ -0,0 +1,95 @@ +/* + * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __EBI__ +#define __EBI__ + +#include <common.h> +#include <asm/io.h> +#include "vct.h" + +#define EXT_DEVICE_CHANNEL_3 (0x30000000) +#define EXT_DEVICE_CHANNEL_2 (0x20000000) +#define EXT_DEVICE_CHANNEL_1 (0x10000000) +#define EXT_CPU_ACCESS_ACTIVE (0x00000001) +#define EXT_DMA_ACCESS_ACTIVE (1 << 14) +#define EXT_CPU_IORDY_SL (0x00000001) + +#define EBI_CPU_WRITE (1 << 31) +#define EBI_CPU_ID_SHIFT (28) +#define EBI_CPU_ADDR_MASK ~(~0UL << EBI_CPU_ID_SHIFT) + +/* position of various bit slices in timing register EBI_DEV[01]_TIM1_RD1 */ +#define ADDR_LATCH_ENABLE 0 +#define ADDR_ACTIVATION 4 +#define CHIP_SELECT_START 8 +#define OUTPUT_ENABLE_START 12 +#define WAIT_TIME 28 +#define READ_DURATION 20 + +/* position of various bit slices in timing register EBI_DEV[01]_TIM1_RD2 */ +#define OUTPUT_ENABLE_END 0 +#define CHIP_SELECT_END 4 +#define ADDR_DEACTIVATION 8 +#define RECOVER_TIME 12 +#define ACK_TIME 20 + +/* various bits in configuration register EBI_DEV[01]_CONFIG1 */ +#define EBI_EXTERNAL_DATA_8 (1 << 8) +#define EBI_EXT_ADDR_SHIFT (1 << 22) +#define EBI_EXTERNAL_DATA_16 EBI_EXT_ADDR_SHIFT +#define EBI_CHIP_SELECT_1 0x2 +#define EBI_CHIP_SELECT_2 0x4 +#define EBI_BUSY_EN_RD (1 << 12) +#define DIR_ACCESS_WRITE (1 << 20) +#define DIR_ACCESS_MASK (1 << 20) + +/* various bits in configuration register EBI_DEV[01]_CONFIG2 */ +#define ADDRESS_INCREMENT_ON 0x0 +#define ADDRESS_INCREMENT_OFF 0x100 +#define QUEUE_LENGTH_1 0x40 +#define QUEUE_LENGTH_2 0x80 +#define QUEUE_LENGTH_3 0xC0 +#define QUEUE_LENGTH_4 0 +#define CPU_TRANSFER_SIZE_32 0 +#define CPU_TRANSFER_SIZE_16 0x10 +#define CPU_TRANSFER_SIZE_8 0x20 +#define READ_ENDIANNESS_ABCD 0 +#define READ_ENDIANNESS_DCBA 0x4 +#define READ_ENDIANNESS_BADC 0x8 +#define READ_ENDIANNESS_CDAB 0xC +#define WRITE_ENDIANNESS_ABCD 0 +#define WRITE_ENDIANNESS_DCBA 0x1 +#define WRITE_ENDIANNESS_BADC 0x2 +#define WRITE_ENDIANNESS_CDAB 0x3 + +/* various bits in configuration register EBI_CTRL_SIG_ACTLV */ +#define IORDY_ACTIVELEVEL_HIGH (1 << 14) +#define ALE_ACTIVELEVEL_HIGH (1 << 8) + +/* bits in register EBI_SIG_LEVEL */ +#define IORDY_LEVEL_MASK 1 + +static inline void ebi_wait(void) +{ + while (reg_read(EBI_STATUS(EBI_BASE)) & EXT_CPU_ACCESS_ACTIVE) + ; /* wait */ +} + +#endif |