arch/m68knommu/platform/68360/config.c

   1 /*
   2  *  linux/arch/m68knommu/platform/68360/config.c
   3  *
   4  *  Copyright (c) 2000 Michael Leslie <mleslie@lineo.com>
   5  *  Copyright (C) 1993 Hamish Macdonald
   6  *  Copyright (C) 1999 D. Jeff Dionne <jeff@uclinux.org>
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file COPYING in the main directory of this archive
  10  * for more details.
  11  */
  12
  13 #include <stdarg.h>
  14 #include <linux/types.h>
  15 #include <linux/kernel.h>
  16 #include <linux/mm.h>
  17 #include <linux/tty.h>
  18 #include <linux/console.h>
  19
  20 #include <asm/setup.h>
  21 #include <asm/system.h>
  22 #include <asm/pgtable.h>
  23 #include <asm/irq.h>
  24 #include <asm/machdep.h>
  25 #include <asm/m68360.h>
  26
  27 #ifdef CONFIG_UCQUICC
  28 #include <asm/bootstd.h>
  29 #endif
  30
  31 extern void m360_cpm_reset(void);
  32
  33 // Mask to select if the PLL prescaler is enabled.
  34 #define MCU_PREEN   ((unsigned short)(0x0001 << 13))
  35
  36 #if defined(CONFIG_UCQUICC)
  37 #define OSCILLATOR  (unsigned long int)33000000
  38 #endif
  39
  40 unsigned long int system_clock;
  41
  42 void M68360_init_IRQ(void);
  43
  44 extern QUICC *pquicc;
  45
  46 /* TODO  DON"T Hard Code this */
  47 /* calculate properly using the right PLL and prescaller */
  48 // unsigned int system_clock = 33000000l;
  49 extern unsigned long int system_clock; //In kernel setup.c
  50
  51 extern void config_M68360_irq(void);
  52
  53 void BSP_sched_init(void (*timer_routine)(int, void *, struct pt_regs *))
  54 {
  55   unsigned char prescaler;
  56   unsigned short tgcr_save;
  57   int return_value;
  58
  59 #if 0
  60   /* Restart mode, Enable int, 32KHz, Enable timer */
  61   TCTL = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_32KHZ | TCTL_TEN;
  62   /* Set prescaler (Divide 32KHz by 32)*/
  63   TPRER = 31;
  64   /* Set compare register  32Khz / 32 / 10 = 100 */
  65   TCMP = 10;
  66
  67   request_irq(IRQ_MACHSPEC | 1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  68 #endif
  69
  70   /* General purpose quicc timers: MC68360UM p7-20 */
  71
  72   /* Set up timer 1 (in [1..4]) to do 100Hz */
  73   tgcr_save = pquicc->timer_tgcr & 0xfff0;
  74   pquicc->timer_tgcr  = tgcr_save; /* stop and reset timer 1 */
  75   /* pquicc->timer_tgcr |= 0x4444; */ /* halt timers when FREEZE (ie bdm freeze) */
  76
  77   prescaler = 8;
  78   pquicc->timer_tmr1 = 0x001a | /* or=1, frr=1, iclk=01b */
  79                            (unsigned short)((prescaler - 1) << 8);
  80
  81   pquicc->timer_tcn1 = 0x0000; /* initial count */
  82   /* calculate interval for 100Hz based on the _system_clock: */
  83   pquicc->timer_trr1 = (system_clock/ prescaler) / HZ; /* reference count */
  84
  85   pquicc->timer_ter1 = 0x0003; /* clear timer events */
  86
  87   /* enable timer 1 interrupt in CIMR */
  88 //  request_irq(IRQ_MACHSPEC | CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  89   //return_value = request_irq( CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  90   return_value = request_irq(CPMVEC_TIMER1 , timer_routine, IRQ_FLG_LOCK,
  91           "Timer", NULL);
  92
  93   /* Start timer 1: */
  94   tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001;
  95   pquicc->timer_tgcr  = tgcr_save;
  96 }
  97
  98
  99 void BSP_tick(void)
 100 {
 101   /* Reset Timer1 */
 102   /* TSTAT &= 0; */
 103
 104   pquicc->timer_ter1 = 0x0002; /* clear timer event */
 105 }
 106
 107 unsigned long BSP_gettimeoffset (void)
 108 {
 109   return 0;
 110 }
 111
 112 void BSP_gettod (int *yearp, int *monp, int *dayp,
 113                    int *hourp, int *minp, int *secp)
 114 {
 115 }
 116
 117 int BSP_hwclk(int op, struct rtc_time *t)
 118 {
 119   if (!op) {
 120     /* read */
 121   } else {
 122     /* write */
 123   }
 124   return 0;
 125 }
 126
 127 int BSP_set_clock_mmss (unsigned long nowtime)
 128 {
 129 #if 0
 130   short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
 131
 132   tod->second1 = real_seconds / 10;
 133   tod->second2 = real_seconds % 10;
 134   tod->minute1 = real_minutes / 10;
 135   tod->minute2 = real_minutes % 10;
 136 #endif
 137   return 0;
 138 }
 139
 140 void BSP_reset (void)
 141 {
 142   local_irq_disable();
 143   asm volatile (
 144     "moveal #_start, %a0;\n"
 145     "moveb #0, 0xFFFFF300;\n"
 146     "moveal 0(%a0), %sp;\n"
 147     "moveal 4(%a0), %a0;\n"
 148     "jmp (%a0);\n"
 149     );
 150 }
 151
 152 unsigned char *scc1_hwaddr;
 153 static int errno;
 154
 155 #if defined (CONFIG_UCQUICC)
 156 _bsc0(char *, getserialnum)
 157 _bsc1(unsigned char *, gethwaddr, int, a)
 158 _bsc1(char *, getbenv, char *, a)
 159 #endif
 160
 161
 162 void config_BSP(char *command, int len)
 163 {
 164   unsigned char *p;
 165
 166   m360_cpm_reset();
 167
 168   /* Calculate the real system clock value. */
 169   {
 170      unsigned int local_pllcr = (unsigned int)(pquicc->sim_pllcr);
 171      if( local_pllcr & MCU_PREEN ) // If the prescaler is dividing by 128
 172      {
 173          int mf = (int)(pquicc->sim_pllcr & 0x0fff);
 174          system_clock = (OSCILLATOR / 128) * (mf + 1);
 175      }
 176      else
 177      {
 178          int mf = (int)(pquicc->sim_pllcr & 0x0fff);
 179          system_clock = (OSCILLATOR) * (mf + 1);
 180      }
 181   }
 182
 183   printk(KERN_INFO "\n68360 QUICC support (C) 2000 Lineo Inc.\n");
 184
 185 #if defined(CONFIG_UCQUICC) && 0
 186   printk(KERN_INFO "uCquicc serial string [%s]\n",getserialnum());
 187   p = scc1_hwaddr = gethwaddr(0);
 188   printk(KERN_INFO "uCquicc hwaddr %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
 189          p[0], p[1], p[2], p[3], p[4], p[5]);
 190
 191   p = getbenv("APPEND");
 192   if (p)
 193     strcpy(p,command);
 194   else
 195     command[0] = 0;
 196 #else
 197   scc1_hwaddr = "\00\01\02\03\04\05";
 198 #endif
 199
 200   mach_sched_init      = BSP_sched_init;
 201   mach_tick            = BSP_tick;
 202   mach_gettimeoffset   = BSP_gettimeoffset;
 203   mach_gettod          = BSP_gettod;
 204   mach_hwclk           = NULL;
 205   mach_set_clock_mmss  = NULL;
 206   mach_reset           = BSP_reset;
 207 }