arch/m68knommu/platform/68328/config.c

   1 /*
   2  *  linux/arch/$(ARCH)/platform/$(PLATFORM)/config.c
   3  *
   4  *  Copyright (C) 1993 Hamish Macdonald
   5  *  Copyright (C) 1999 D. Jeff Dionne
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file COPYING in the main directory of this archive
   9  * for more details.
  10  *
  11  * VZ Support/Fixes             Evan Stawnyczy <e@lineo.ca>
  12  */
  13
  14 #include <asm/dbg.h>
  15 #include <stdarg.h>
  16 #include <linux/config.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/mm.h>
  20 #include <linux/tty.h>
  21 #include <linux/console.h>
  22 #include <linux/interrupt.h>
  23 #include <asm/current.h>
  24
  25 #include <asm/setup.h>
  26 #include <asm/system.h>
  27 #include <asm/pgtable.h>
  28 #include <asm/irq.h>
  29 #include <asm/machdep.h>
  30 #include <asm/MC68328.h>
  31
  32
  33 void BSP_sched_init(irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
  34 {
  35
  36 #ifdef CONFIG_XCOPILOT_BUGS
  37   /*
  38    * The only thing I know is that CLK32 is not available on Xcopilot
  39    * I have little idea about what frequency SYSCLK has on Xcopilot.
  40    * The values for prescaler and compare registers were simply
  41    * taken from the original source
  42    */
  43
  44   /* Restart mode, Enable int, SYSCLK, Enable timer */
  45   TCTL2 = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_SYSCLK | TCTL_TEN;
  46   /* Set prescaler */
  47   TPRER2 = 2;
  48   /* Set compare register */
  49   TCMP2 = 0xd7e4;
  50 #else
  51   /* Restart mode, Enable int, 32KHz, Enable timer */
  52   TCTL2 = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_32KHZ | TCTL_TEN;
  53   /* Set prescaler (Divide 32KHz by 32)*/
  54   TPRER2 = 31;
  55   /* Set compare register  32Khz / 32 / 10 = 100 */
  56   TCMP2 = 10;
  57 #endif
  58
  59   request_irq(TMR2_IRQ_NUM, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  60 }
  61
  62 void BSP_tick(void)
  63 {
  64   /* Reset Timer2 */
  65   TSTAT2 &= 0;
  66 }
  67
  68 unsigned long BSP_gettimeoffset (void)
  69 {
  70   return 0;
  71 }
  72
  73 void BSP_gettod (int *yearp, int *monp, int *dayp,
  74                    int *hourp, int *minp, int *secp)
  75 {
  76 }
  77
  78 int BSP_hwclk(int op, struct hwclk_time *t)
  79 {
  80   if (!op) {
  81     /* read */
  82   } else {
  83     /* write */
  84   }
  85   return 0;
  86 }
  87
  88 int BSP_set_clock_mmss (unsigned long nowtime)
  89 {
  90 #if 0
  91   short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
  92
  93   tod->second1 = real_seconds / 10;
  94   tod->second2 = real_seconds % 10;
  95   tod->minute1 = real_minutes / 10;
  96   tod->minute2 = real_minutes % 10;
  97 #endif
  98   return 0;
  99 }
 100
 101 void BSP_reset (void)
 102 {
 103   local_irq_disable();
 104   asm volatile ("moveal #0x10c00000, %a0;\n\t"
 105                 "moveb #0, 0xFFFFF300;\n\t"
 106                 "moveal 0(%a0), %sp;\n\t"
 107                 "moveal 4(%a0), %a0;\n\t"
 108                 "jmp (%a0);");
 109 }
 110
 111 void config_BSP(char *command, int len)
 112 {
 113   printk(KERN_INFO "\n68328 support D. Jeff Dionne <jeff@uclinux.org>\n");
 114   printk(KERN_INFO "68328 support Kenneth Albanowski <kjahds@kjshds.com>\n");
 115   printk(KERN_INFO "68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n");
 116
 117   mach_sched_init      = BSP_sched_init;
 118   mach_tick            = BSP_tick;
 119   mach_gettimeoffset   = BSP_gettimeoffset;
 120   mach_gettod          = BSP_gettod;
 121   mach_hwclk           = NULL;
 122   mach_set_clock_mmss  = NULL;
 123   mach_reset           = BSP_reset;
 124   *command = '\0';
 125 }