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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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7dca3343fc
This rework allows to address tow memory controllers. AT91SAM9263 and AT91SAM9G45 family have tow SDRAM or DDR/SDRAM controllers. Power management should take care of this. This patch modify the way RAM IP header files are implemented to allow access to registers of both controllers ; it also adds some macros. We also modify the power management files to use those modified header files. Slow clock (assembly) and regular power management functions are synchronized for setting of RAM self-refresh procedure: (lpr & ~AT91_DDRSDRC_LPCB) | AT91_DDRSDRC_LPCB_SELF_REFRESH Note that AT91RM9200 is not impacted by this modification. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
92 lines
3.9 KiB
C
92 lines
3.9 KiB
C
/*
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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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/* Register access macros */
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#define at91_ramc_read(num, reg) \
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at91_sys_read(AT91_SDRAMC##num + reg)
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#define at91_ramc_write(num, reg, value) \
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at91_sys_write(AT91_SDRAMC##num + reg, value)
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#endif
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