86 lines
3.7 KiB
C
Executable file
86 lines
3.7 KiB
C
Executable file
/*
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* arch/arm/mach-at91/include/mach/at91sam9_sdramc.h
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*
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* Copyright (C) 2007 Andrew Victor
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* Copyright (C) 2007 Atmel Corporation.
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*
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* SDRAM Controllers (SDRAMC) - System peripherals registers.
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* Based on AT91SAM9261 datasheet revision D.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef AT91SAM9_SDRAMC_H
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#define AT91SAM9_SDRAMC_H
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/* SDRAM Controller (SDRAMC) registers */
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#define AT91_SDRAMC_MR 0x00 /* SDRAM Controller Mode Register */
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#define AT91_SDRAMC_MODE (0xf << 0) /* Command Mode */
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#define AT91_SDRAMC_MODE_NORMAL 0
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#define AT91_SDRAMC_MODE_NOP 1
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#define AT91_SDRAMC_MODE_PRECHARGE 2
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#define AT91_SDRAMC_MODE_LMR 3
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#define AT91_SDRAMC_MODE_REFRESH 4
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#define AT91_SDRAMC_MODE_EXT_LMR 5
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#define AT91_SDRAMC_MODE_DEEP 6
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#define AT91_SDRAMC_TR 0x04 /* SDRAM Controller Refresh Timer Register */
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#define AT91_SDRAMC_COUNT (0xfff << 0) /* Refresh Timer Counter */
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#define AT91_SDRAMC_CR 0x08 /* SDRAM Controller Configuration Register */
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#define AT91_SDRAMC_NC (3 << 0) /* Number of Column Bits */
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#define AT91_SDRAMC_NC_8 (0 << 0)
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#define AT91_SDRAMC_NC_9 (1 << 0)
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#define AT91_SDRAMC_NC_10 (2 << 0)
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#define AT91_SDRAMC_NC_11 (3 << 0)
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#define AT91_SDRAMC_NR (3 << 2) /* Number of Row Bits */
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#define AT91_SDRAMC_NR_11 (0 << 2)
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#define AT91_SDRAMC_NR_12 (1 << 2)
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#define AT91_SDRAMC_NR_13 (2 << 2)
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#define AT91_SDRAMC_NB (1 << 4) /* Number of Banks */
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#define AT91_SDRAMC_NB_2 (0 << 4)
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#define AT91_SDRAMC_NB_4 (1 << 4)
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#define AT91_SDRAMC_CAS (3 << 5) /* CAS Latency */
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#define AT91_SDRAMC_CAS_1 (1 << 5)
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#define AT91_SDRAMC_CAS_2 (2 << 5)
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#define AT91_SDRAMC_CAS_3 (3 << 5)
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#define AT91_SDRAMC_DBW (1 << 7) /* Data Bus Width */
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#define AT91_SDRAMC_DBW_32 (0 << 7)
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#define AT91_SDRAMC_DBW_16 (1 << 7)
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#define AT91_SDRAMC_TWR (0xf << 8) /* Write Recovery Delay */
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#define AT91_SDRAMC_TRC (0xf << 12) /* Row Cycle Delay */
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#define AT91_SDRAMC_TRP (0xf << 16) /* Row Precharge Delay */
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#define AT91_SDRAMC_TRCD (0xf << 20) /* Row to Column Delay */
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#define AT91_SDRAMC_TRAS (0xf << 24) /* Active to Precharge Delay */
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#define AT91_SDRAMC_TXSR (0xf << 28) /* Exit Self Refresh to Active Delay */
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#define AT91_SDRAMC_LPR 0x10 /* SDRAM Controller Low Power Register */
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#define AT91_SDRAMC_LPCB (3 << 0) /* Low-power Configurations */
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#define AT91_SDRAMC_LPCB_DISABLE 0
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#define AT91_SDRAMC_LPCB_SELF_REFRESH 1
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#define AT91_SDRAMC_LPCB_POWER_DOWN 2
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#define AT91_SDRAMC_LPCB_DEEP_POWER_DOWN 3
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#define AT91_SDRAMC_PASR (7 << 4) /* Partial Array Self Refresh */
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#define AT91_SDRAMC_TCSR (3 << 8) /* Temperature Compensated Self Refresh */
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#define AT91_SDRAMC_DS (3 << 10) /* Drive Strength */
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#define AT91_SDRAMC_TIMEOUT (3 << 12) /* Time to define when Low Power Mode is enabled */
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#define AT91_SDRAMC_TIMEOUT_0_CLK_CYCLES (0 << 12)
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#define AT91_SDRAMC_TIMEOUT_64_CLK_CYCLES (1 << 12)
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#define AT91_SDRAMC_TIMEOUT_128_CLK_CYCLES (2 << 12)
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#define AT91_SDRAMC_IER 0x14 /* SDRAM Controller Interrupt Enable Register */
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#define AT91_SDRAMC_IDR 0x18 /* SDRAM Controller Interrupt Disable Register */
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#define AT91_SDRAMC_IMR 0x1C /* SDRAM Controller Interrupt Mask Register */
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#define AT91_SDRAMC_ISR 0x20 /* SDRAM Controller Interrupt Status Register */
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#define AT91_SDRAMC_RES (1 << 0) /* Refresh Error Status */
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#define AT91_SDRAMC_MDR 0x24 /* SDRAM Memory Device Register */
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#define AT91_SDRAMC_MD (3 << 0) /* Memory Device Type */
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#define AT91_SDRAMC_MD_SDRAM 0
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#define AT91_SDRAMC_MD_LOW_POWER_SDRAM 1
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#endif
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