118 lines
4.5 KiB
C
118 lines
4.5 KiB
C
/*
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* [origin: Linux kernel arch/arm/mach-at91/include/mach/at91_wdt.h]
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*
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* Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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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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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef AT91SAM9_SDRAMC_H
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#define AT91SAM9_SDRAMC_H
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#ifdef __ASSEMBLY__
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#ifndef ATMEL_BASE_SDRAMC
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#define ATMEL_BASE_SDRAMC ATMEL_BASE_SDRAMC0
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#endif
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#define AT91_ASM_SDRAMC_MR ATMEL_BASE_SDRAMC
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#define AT91_ASM_SDRAMC_TR (ATMEL_BASE_SDRAMC + 0x04)
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#define AT91_ASM_SDRAMC_CR (ATMEL_BASE_SDRAMC + 0x08)
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#define AT91_ASM_SDRAMC_MDR (ATMEL_BASE_SDRAMC + 0x24)
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#else
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struct sdramc_reg {
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u32 mr;
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u32 tr;
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u32 cr;
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u32 lpr;
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u32 ier;
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u32 idr;
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u32 imr;
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u32 isr;
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u32 mdr;
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};
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int sdramc_initialize(unsigned int sdram_address,
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const struct sdramc_reg *p);
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#endif
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/* SDRAM Controller (SDRAMC) registers */
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#define AT91_SDRAMC_MR (ATMEL_BASE_SDRAMC + 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 (ATMEL_BASE_SDRAMC + 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 (ATMEL_BASE_SDRAMC + 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_TWR_VAL(x) (x << 8)
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#define AT91_SDRAMC_TRC (0xf << 12) /* Row Cycle Delay */
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#define AT91_SDRAMC_TRC_VAL(x) (x << 12)
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#define AT91_SDRAMC_TRP (0xf << 16) /* Row Precharge Delay */
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#define AT91_SDRAMC_TRP_VAL(x) (x << 16)
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#define AT91_SDRAMC_TRCD (0xf << 20) /* Row to Column Delay */
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#define AT91_SDRAMC_TRCD_VAL(x) (x << 20)
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#define AT91_SDRAMC_TRAS (0xf << 24) /* Active to Precharge Delay */
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#define AT91_SDRAMC_TRAS_VAL(x) (x << 24)
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#define AT91_SDRAMC_TXSR (0xf << 28) /* Exit Self Refresh to Active Delay */
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#define AT91_SDRAMC_TXSR_VAL(x) (x << 28)
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#define AT91_SDRAMC_LPR (ATMEL_BASE_SDRAMC + 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 (ATMEL_BASE_SDRAMC + 0x14) /* SDRAM Controller Interrupt Enable Register */
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#define AT91_SDRAMC_IDR (ATMEL_BASE_SDRAMC + 0x18) /* SDRAM Controller Interrupt Disable Register */
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#define AT91_SDRAMC_IMR (ATMEL_BASE_SDRAMC + 0x1C) /* SDRAM Controller Interrupt Mask Register */
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#define AT91_SDRAMC_ISR (ATMEL_BASE_SDRAMC + 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 (ATMEL_BASE_SDRAMC + 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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