1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * arch/arm/mach-at91/include/mach/at91sam9_sdramc.h 4 * 5 * Copyright (C) 2007 Andrew Victor 6 * Copyright (C) 2007 Atmel Corporation. 7 * 8 * SDRAM Controllers (SDRAMC) - System peripherals registers. 9 * Based on AT91SAM9261 datasheet revision D. 10 */ 11 12 #ifndef AT91SAM9_SDRAMC_H 13 #define AT91SAM9_SDRAMC_H 14 15 /* SDRAM Controller (SDRAMC) registers */ 16 #define AT91_SDRAMC_MR 0x00 /* SDRAM Controller Mode Register */ 17 #define AT91_SDRAMC_MODE (0xf << 0) /* Command Mode */ 18 #define AT91_SDRAMC_MODE_NORMAL 0 19 #define AT91_SDRAMC_MODE_NOP 1 20 #define AT91_SDRAMC_MODE_PRECHARGE 2 21 #define AT91_SDRAMC_MODE_LMR 3 22 #define AT91_SDRAMC_MODE_REFRESH 4 23 #define AT91_SDRAMC_MODE_EXT_LMR 5 24 #define AT91_SDRAMC_MODE_DEEP 6 25 26 #define AT91_SDRAMC_TR 0x04 /* SDRAM Controller Refresh Timer Register */ 27 #define AT91_SDRAMC_COUNT (0xfff << 0) /* Refresh Timer Counter */ 28 29 #define AT91_SDRAMC_CR 0x08 /* SDRAM Controller Configuration Register */ 30 #define AT91_SDRAMC_NC (3 << 0) /* Number of Column Bits */ 31 #define AT91_SDRAMC_NC_8 (0 << 0) 32 #define AT91_SDRAMC_NC_9 (1 << 0) 33 #define AT91_SDRAMC_NC_10 (2 << 0) 34 #define AT91_SDRAMC_NC_11 (3 << 0) 35 #define AT91_SDRAMC_NR (3 << 2) /* Number of Row Bits */ 36 #define AT91_SDRAMC_NR_11 (0 << 2) 37 #define AT91_SDRAMC_NR_12 (1 << 2) 38 #define AT91_SDRAMC_NR_13 (2 << 2) 39 #define AT91_SDRAMC_NB (1 << 4) /* Number of Banks */ 40 #define AT91_SDRAMC_NB_2 (0 << 4) 41 #define AT91_SDRAMC_NB_4 (1 << 4) 42 #define AT91_SDRAMC_CAS (3 << 5) /* CAS Latency */ 43 #define AT91_SDRAMC_CAS_1 (1 << 5) 44 #define AT91_SDRAMC_CAS_2 (2 << 5) 45 #define AT91_SDRAMC_CAS_3 (3 << 5) 46 #define AT91_SDRAMC_DBW (1 << 7) /* Data Bus Width */ 47 #define AT91_SDRAMC_DBW_32 (0 << 7) 48 #define AT91_SDRAMC_DBW_16 (1 << 7) 49 #define AT91_SDRAMC_TWR (0xf << 8) /* Write Recovery Delay */ 50 #define AT91_SDRAMC_TRC (0xf << 12) /* Row Cycle Delay */ 51 #define AT91_SDRAMC_TRP (0xf << 16) /* Row Precharge Delay */ 52 #define AT91_SDRAMC_TRCD (0xf << 20) /* Row to Column Delay */ 53 #define AT91_SDRAMC_TRAS (0xf << 24) /* Active to Precharge Delay */ 54 #define AT91_SDRAMC_TXSR (0xf << 28) /* Exit Self Refresh to Active Delay */ 55 56 #define AT91_SDRAMC_LPR 0x10 /* SDRAM Controller Low Power Register */ 57 #define AT91_SDRAMC_LPCB (3 << 0) /* Low-power Configurations */ 58 #define AT91_SDRAMC_LPCB_DISABLE 0 59 #define AT91_SDRAMC_LPCB_SELF_REFRESH 1 60 #define AT91_SDRAMC_LPCB_POWER_DOWN 2 61 #define AT91_SDRAMC_LPCB_DEEP_POWER_DOWN 3 62 #define AT91_SDRAMC_PASR (7 << 4) /* Partial Array Self Refresh */ 63 #define AT91_SDRAMC_TCSR (3 << 8) /* Temperature Compensated Self Refresh */ 64 #define AT91_SDRAMC_DS (3 << 10) /* Drive Strength */ 65 #define AT91_SDRAMC_TIMEOUT (3 << 12) /* Time to define when Low Power Mode is enabled */ 66 #define AT91_SDRAMC_TIMEOUT_0_CLK_CYCLES (0 << 12) 67 #define AT91_SDRAMC_TIMEOUT_64_CLK_CYCLES (1 << 12) 68 #define AT91_SDRAMC_TIMEOUT_128_CLK_CYCLES (2 << 12) 69 70 #define AT91_SDRAMC_IER 0x14 /* SDRAM Controller Interrupt Enable Register */ 71 #define AT91_SDRAMC_IDR 0x18 /* SDRAM Controller Interrupt Disable Register */ 72 #define AT91_SDRAMC_IMR 0x1C /* SDRAM Controller Interrupt Mask Register */ 73 #define AT91_SDRAMC_ISR 0x20 /* SDRAM Controller Interrupt Status Register */ 74 #define AT91_SDRAMC_RES (1 << 0) /* Refresh Error Status */ 75 76 #define AT91_SDRAMC_MDR 0x24 /* SDRAM Memory Device Register */ 77 #define AT91_SDRAMC_MD (3 << 0) /* Memory Device Type */ 78 #define AT91_SDRAMC_MD_SDRAM 0 79 #define AT91_SDRAMC_MD_LOW_POWER_SDRAM 1 80 81 #endif 82