arch/arm/mach-iop13xx/include/mach/time.h

   1 #ifndef _IOP13XX_TIME_H_
   2 #define _IOP13XX_TIME_H_
   3
   4 #include <mach/irqs.h>
   5
   6 #define IRQ_IOP_TIMER0 IRQ_IOP13XX_TIMER0
   7
   8 #define IOP_TMR_EN          0x02
   9 #define IOP_TMR_RELOAD      0x04
  10 #define IOP_TMR_PRIVILEGED 0x08
  11 #define IOP_TMR_RATIO_1_1  0x00
  12
  13 #define IOP13XX_XSI_FREQ_RATIO_MASK     (3 << 19)
  14 #define IOP13XX_XSI_FREQ_RATIO_2        (0 << 19)
  15 #define IOP13XX_XSI_FREQ_RATIO_3        (1 << 19)
  16 #define IOP13XX_XSI_FREQ_RATIO_4        (2 << 19)
  17 #define IOP13XX_CORE_FREQ_MASK          (7 << 16)
  18 #define IOP13XX_CORE_FREQ_600           (0 << 16)
  19 #define IOP13XX_CORE_FREQ_667           (1 << 16)
  20 #define IOP13XX_CORE_FREQ_800           (2 << 16)
  21 #define IOP13XX_CORE_FREQ_933           (3 << 16)
  22 #define IOP13XX_CORE_FREQ_1000          (4 << 16)
  23 #define IOP13XX_CORE_FREQ_1200          (5 << 16)
  24
  25 void iop_init_time(unsigned long tickrate);
  26
  27 static inline unsigned long iop13xx_core_freq(void)
  28 {
  29         unsigned long freq = __raw_readl(IOP13XX_PROCESSOR_FREQ);
  30         freq &= IOP13XX_CORE_FREQ_MASK;
  31         switch (freq) {
  32         case IOP13XX_CORE_FREQ_600:
  33                 return 600000000;
  34         case IOP13XX_CORE_FREQ_667:
  35                 return 667000000;
  36         case IOP13XX_CORE_FREQ_800:
  37                 return 800000000;
  38         case IOP13XX_CORE_FREQ_933:
  39                 return 933000000;
  40         case IOP13XX_CORE_FREQ_1000:
  41                 return 1000000000;
  42         case IOP13XX_CORE_FREQ_1200:
  43                 return 1200000000;
  44         default:
  45                 printk("%s: warning unknown frequency, defaulting to 800Mhz\n",
  46                         __func__);
  47         }
  48
  49         return 800000000;
  50 }
  51
  52 static inline unsigned long iop13xx_xsi_bus_ratio(void)
  53 {
  54         unsigned long  ratio = __raw_readl(IOP13XX_PROCESSOR_FREQ);
  55         ratio &= IOP13XX_XSI_FREQ_RATIO_MASK;
  56         switch (ratio) {
  57         case IOP13XX_XSI_FREQ_RATIO_2:
  58                 return 2;
  59         case IOP13XX_XSI_FREQ_RATIO_3:
  60                 return 3;
  61         case IOP13XX_XSI_FREQ_RATIO_4:
  62                 return 4;
  63         default:
  64                 printk("%s: warning unknown ratio, defaulting to 2\n",
  65                         __func__);
  66         }
  67
  68         return 2;
  69 }
  70
  71 static inline u32 read_tmr0(void)
  72 {
  73         u32 val;
  74         asm volatile("mrc p6, 0, %0, c0, c9, 0" : "=r" (val));
  75         return val;
  76 }
  77
  78 static inline void write_tmr0(u32 val)
  79 {
  80         asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (val));
  81 }
  82
  83 static inline void write_tmr1(u32 val)
  84 {
  85         asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (val));
  86 }
  87
  88 static inline u32 read_tcr0(void)
  89 {
  90         u32 val;
  91         asm volatile("mrc p6, 0, %0, c2, c9, 0" : "=r" (val));
  92         return val;
  93 }
  94
  95 static inline void write_tcr0(u32 val)
  96 {
  97         asm volatile("mcr p6, 0, %0, c2, c9, 0" : : "r" (val));
  98 }
  99
 100 static inline u32 read_tcr1(void)
 101 {
 102         u32 val;
 103         asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
 104         return val;
 105 }
 106
 107 static inline void write_tcr1(u32 val)
 108 {
 109         asm volatile("mcr p6, 0, %0, c3, c9, 0" : : "r" (val));
 110 }
 111
 112 static inline void write_trr0(u32 val)
 113 {
 114         asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (val));
 115 }
 116
 117 static inline void write_trr1(u32 val)
 118 {
 119         asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (val));
 120 }
 121
 122 static inline void write_tisr(u32 val)
 123 {
 124         asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (val));
 125 }
 126 #endif