arch/arm/mach-at91/include/mach/at91sam9_sdramc.h

   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