1 /* 2 * arch/arm/mach-at91/include/mach/at91sam9_sdramc.h 3 * 4 * Copyright (C) 2007 Andrew Victor 5 * Copyright (C) 2007 Atmel Corporation. 6 * 7 * SDRAM Controllers (SDRAMC) - System peripherals registers. 8 * Based on AT91SAM9261 datasheet revision D. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 */ 15 16 #ifndef AT91SAM9_SDRAMC_H 17 #define AT91SAM9_SDRAMC_H 18 19 /* SDRAM Controller (SDRAMC) registers */ 20 #define AT91_SDRAMC_MR 0x00 /* SDRAM Controller Mode Register */ 21 #define AT91_SDRAMC_MODE (0xf << 0) /* Command Mode */ 22 #define AT91_SDRAMC_MODE_NORMAL 0 23 #define AT91_SDRAMC_MODE_NOP 1 24 #define AT91_SDRAMC_MODE_PRECHARGE 2 25 #define AT91_SDRAMC_MODE_LMR 3 26 #define AT91_SDRAMC_MODE_REFRESH 4 27 #define AT91_SDRAMC_MODE_EXT_LMR 5 28 #define AT91_SDRAMC_MODE_DEEP 6 29 30 #define AT91_SDRAMC_TR 0x04 /* SDRAM Controller Refresh Timer Register */ 31 #define AT91_SDRAMC_COUNT (0xfff << 0) /* Refresh Timer Counter */ 32 33 #define AT91_SDRAMC_CR 0x08 /* SDRAM Controller Configuration Register */ 34 #define AT91_SDRAMC_NC (3 << 0) /* Number of Column Bits */ 35 #define AT91_SDRAMC_NC_8 (0 << 0) 36 #define AT91_SDRAMC_NC_9 (1 << 0) 37 #define AT91_SDRAMC_NC_10 (2 << 0) 38 #define AT91_SDRAMC_NC_11 (3 << 0) 39 #define AT91_SDRAMC_NR (3 << 2) /* Number of Row Bits */ 40 #define AT91_SDRAMC_NR_11 (0 << 2) 41 #define AT91_SDRAMC_NR_12 (1 << 2) 42 #define AT91_SDRAMC_NR_13 (2 << 2) 43 #define AT91_SDRAMC_NB (1 << 4) /* Number of Banks */ 44 #define AT91_SDRAMC_NB_2 (0 << 4) 45 #define AT91_SDRAMC_NB_4 (1 << 4) 46 #define AT91_SDRAMC_CAS (3 << 5) /* CAS Latency */ 47 #define AT91_SDRAMC_CAS_1 (1 << 5) 48 #define AT91_SDRAMC_CAS_2 (2 << 5) 49 #define AT91_SDRAMC_CAS_3 (3 << 5) 50 #define AT91_SDRAMC_DBW (1 << 7) /* Data Bus Width */ 51 #define AT91_SDRAMC_DBW_32 (0 << 7) 52 #define AT91_SDRAMC_DBW_16 (1 << 7) 53 #define AT91_SDRAMC_TWR (0xf << 8) /* Write Recovery Delay */ 54 #define AT91_SDRAMC_TRC (0xf << 12) /* Row Cycle Delay */ 55 #define AT91_SDRAMC_TRP (0xf << 16) /* Row Precharge Delay */ 56 #define AT91_SDRAMC_TRCD (0xf << 20) /* Row to Column Delay */ 57 #define AT91_SDRAMC_TRAS (0xf << 24) /* Active to Precharge Delay */ 58 #define AT91_SDRAMC_TXSR (0xf << 28) /* Exit Self Refresh to Active Delay */ 59 60 #define AT91_SDRAMC_LPR 0x10 /* SDRAM Controller Low Power Register */ 61 #define AT91_SDRAMC_LPCB (3 << 0) /* Low-power Configurations */ 62 #define AT91_SDRAMC_LPCB_DISABLE 0 63 #define AT91_SDRAMC_LPCB_SELF_REFRESH 1 64 #define AT91_SDRAMC_LPCB_POWER_DOWN 2 65 #define AT91_SDRAMC_LPCB_DEEP_POWER_DOWN 3 66 #define AT91_SDRAMC_PASR (7 << 4) /* Partial Array Self Refresh */ 67 #define AT91_SDRAMC_TCSR (3 << 8) /* Temperature Compensated Self Refresh */ 68 #define AT91_SDRAMC_DS (3 << 10) /* Drive Strength */ 69 #define AT91_SDRAMC_TIMEOUT (3 << 12) /* Time to define when Low Power Mode is enabled */ 70 #define AT91_SDRAMC_TIMEOUT_0_CLK_CYCLES (0 << 12) 71 #define AT91_SDRAMC_TIMEOUT_64_CLK_CYCLES (1 << 12) 72 #define AT91_SDRAMC_TIMEOUT_128_CLK_CYCLES (2 << 12) 73 74 #define AT91_SDRAMC_IER 0x14 /* SDRAM Controller Interrupt Enable Register */ 75 #define AT91_SDRAMC_IDR 0x18 /* SDRAM Controller Interrupt Disable Register */ 76 #define AT91_SDRAMC_IMR 0x1C /* SDRAM Controller Interrupt Mask Register */ 77 #define AT91_SDRAMC_ISR 0x20 /* SDRAM Controller Interrupt Status Register */ 78 #define AT91_SDRAMC_RES (1 << 0) /* Refresh Error Status */ 79 80 #define AT91_SDRAMC_MDR 0x24 /* SDRAM Memory Device Register */ 81 #define AT91_SDRAMC_MD (3 << 0) /* Memory Device Type */ 82 #define AT91_SDRAMC_MD_SDRAM 0 83 #define AT91_SDRAMC_MD_LOW_POWER_SDRAM 1 84 85 /* Register access macros */ 86 #define at91_ramc_read(num, reg) \ 87 at91_sys_read(AT91_SDRAMC##num + reg) 88 #define at91_ramc_write(num, reg, value) \ 89 at91_sys_write(AT91_SDRAMC##num + reg, value) 90 91 #endif 92