include/asm-arm/arch-l7200/pmu.h

   1 /****************************************************************************/
   2 /*
   3  *  linux/include/asm-arm/arch-l7200/pmu.h
   4  *
   5  *   Registers and  helper functions for the L7200 Link-Up Systems
   6  *   Power Management Unit (PMU).
   7  *
   8  *   (C) Copyright 2000, S A McConnell  (samcconn@cotw.com)
   9  *
  10  *  This file is subject to the terms and conditions of the GNU General Public
  11  *  License. See the file COPYING in the main directory of this archive for
  12  *  more details.
  13  */
  14
  15 /****************************************************************************/
  16
  17 #define PMU_OFF   0x00050000  /* Offset from IO_START to the PMU registers. */
  18
  19 /* IO_START and IO_BASE are defined in hardware.h */
  20
  21 #define PMU_START (IO_START + PMU_OFF)  /* Physical addr. of the PMU reg. */
  22 #define PMU_BASE  (IO_BASE  + PMU_OFF)  /* Virtual addr. of the PMU reg. */
  23
  24
  25 /* Define the PMU registers for use by device drivers and the kernel. */
  26
  27 typedef struct {
  28      unsigned int CURRENT;  /* Current configuration register */
  29      unsigned int NEXT;     /* Next configuration register */
  30      unsigned int reserved;
  31      unsigned int RUN;      /* Run configuration register */
  32      unsigned int COMM;     /* Configuration command register */
  33      unsigned int SDRAM;    /* SDRAM configuration bypass register */
  34 } pmu_interface;
  35
  36 #define PMU ((volatile pmu_interface *)(PMU_BASE))
  37
  38
  39 /* Macro's for reading the common register fields. */
  40
  41 #define GET_TRANSOP(reg)  ((reg >> 25) & 0x03) /* Bits 26-25 */
  42 #define GET_OSCEN(reg)    ((reg >> 16) & 0x01)
  43 #define GET_OSCMUX(reg)   ((reg >> 15) & 0x01)
  44 #define GET_PLLMUL(reg)   ((reg >>  9) & 0x3f) /* Bits 14-9 */
  45 #define GET_PLLEN(reg)    ((reg >>  8) & 0x01)
  46 #define GET_PLLMUX(reg)   ((reg >>  7) & 0x01)
  47 #define GET_BCLK_DIV(reg) ((reg >>  3) & 0x03) /* Bits 4-3 */
  48 #define GET_SDRB_SEL(reg) ((reg >>  2) & 0x01)
  49 #define GET_SDRF_SEL(reg) ((reg >>  1) & 0x01)
  50 #define GET_FASTBUS(reg)  (reg & 0x1)
  51
  52 /* CFG_NEXT register */
  53
  54 #define CFG_NEXT_CLOCKRECOVERY ((PMU->NEXT >> 18) & 0x7f)   /* Bits 24-18 */
  55 #define CFG_NEXT_INTRET        ((PMU->NEXT >> 17) & 0x01)
  56 #define CFG_NEXT_SDR_STOP      ((PMU->NEXT >>  6) & 0x01)
  57 #define CFG_NEXT_SYSCLKEN      ((PMU->NEXT >>  5) & 0x01)
  58
  59 /* Useful field values that can be used to construct the
  60  * CFG_NEXT and CFG_RUN registers.
  61  */
  62
  63 #define TRANSOP_NOP      0<<25  /* NOCHANGE_NOSTALL */
  64 #define NOCHANGE_STALL   1<<25
  65 #define CHANGE_NOSTALL   2<<25
  66 #define CHANGE_STALL     3<<25
  67
  68 #define INTRET           1<<17
  69 #define OSCEN            1<<16
  70 #define OSCMUX           1<<15
  71
  72 /* PLL frequencies */
  73
  74 #define PLLMUL_0         0<<9         /*  3.6864 MHz */
  75 #define PLLMUL_1         1<<9         /*  ?????? MHz */
  76 #define PLLMUL_5         5<<9         /*  18.432 MHz */
  77 #define PLLMUL_10       10<<9         /*  36.864 MHz */
  78 #define PLLMUL_18       18<<9         /*  ?????? MHz */
  79 #define PLLMUL_20       20<<9         /*  73.728 MHz */
  80 #define PLLMUL_32       32<<9         /*  ?????? MHz */
  81 #define PLLMUL_35       35<<9         /* 129.024 MHz */
  82 #define PLLMUL_36       36<<9         /*  ?????? MHz */
  83 #define PLLMUL_39       39<<9         /*  ?????? MHz */
  84 #define PLLMUL_40       40<<9         /* 147.456 MHz */
  85
  86 /* Clock recovery times */
  87
  88 #define CRCLOCK_1        1<<18
  89 #define CRCLOCK_2        2<<18
  90 #define CRCLOCK_4        4<<18
  91 #define CRCLOCK_8        8<<18
  92 #define CRCLOCK_16      16<<18
  93 #define CRCLOCK_32      32<<18
  94 #define CRCLOCK_63      63<<18
  95 #define CRCLOCK_127    127<<18
  96
  97 #define PLLEN            1<<8
  98 #define PLLMUX           1<<7
  99 #define SDR_STOP         1<<6
 100 #define SYSCLKEN         1<<5
 101
 102 #define BCLK_DIV_4       2<<3
 103 #define BCLK_DIV_2       1<<3
 104 #define BCLK_DIV_1       0<<3
 105
 106 #define SDRB_SEL         1<<2
 107 #define SDRF_SEL         1<<1
 108 #define FASTBUS          1<<0
 109
 110
 111 /* CFG_SDRAM */
 112
 113 #define SDRREFFQ         1<<0  /* Only if SDRSTOPRQ is not set. */
 114 #define SDRREFACK        1<<1  /* Read-only */
 115 #define SDRSTOPRQ        1<<2  /* Only if SDRREFFQ is not set. */
 116 #define SDRSTOPACK       1<<3  /* Read-only */
 117 #define PICEN            1<<4  /* Enable Co-procesor */
 118 #define PICTEST          1<<5
 119
 120 #define GET_SDRREFFQ    ((PMU->SDRAM >> 0) & 0x01)
 121 #define GET_SDRREFACK   ((PMU->SDRAM >> 1) & 0x01) /* Read-only */
 122 #define GET_SDRSTOPRQ   ((PMU->SDRAM >> 2) & 0x01)
 123 #define GET_SDRSTOPACK  ((PMU->SDRAM >> 3) & 0x01) /* Read-only */
 124 #define GET_PICEN       ((PMU->SDRAM >> 4) & 0x01)
 125 #define GET_PICTEST     ((PMU->SDRAM >> 5) & 0x01)