arch/m68k/apollo/config.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/init.h>
   3 #include <linux/types.h>
   4 #include <linux/kernel.h>
   5 #include <linux/mm.h>
   6 #include <linux/tty.h>
   7 #include <linux/rtc.h>
   8 #include <linux/vt_kern.h>
   9 #include <linux/interrupt.h>
  10
  11 #include <asm/setup.h>
  12 #include <asm/bootinfo.h>
  13 #include <asm/bootinfo-apollo.h>
  14 #include <asm/byteorder.h>
  15 #include <asm/apollohw.h>
  16 #include <asm/irq.h>
  17 #include <asm/machdep.h>
  18 #include <asm/config.h>
  19
  20 #include "apollo.h"
  21
  22 u_long sio01_physaddr;
  23 u_long sio23_physaddr;
  24 u_long rtc_physaddr;
  25 u_long pica_physaddr;
  26 u_long picb_physaddr;
  27 u_long cpuctrl_physaddr;
  28 u_long timer_physaddr;
  29 u_long apollo_model;
  30
  31 extern void dn_sched_init(void);
  32 extern int dn_dummy_hwclk(int, struct rtc_time *);
  33 static void dn_dummy_reset(void);
  34 #ifdef CONFIG_HEARTBEAT
  35 static void dn_heartbeat(int on);
  36 #endif
  37 static irqreturn_t dn_timer_int(int irq,void *);
  38 static void dn_get_model(char *model);
  39 static const char *apollo_models[] = {
  40         [APOLLO_DN3000-APOLLO_DN3000] = "DN3000 (Otter)",
  41         [APOLLO_DN3010-APOLLO_DN3000] = "DN3010 (Otter)",
  42         [APOLLO_DN3500-APOLLO_DN3000] = "DN3500 (Cougar II)",
  43         [APOLLO_DN4000-APOLLO_DN3000] = "DN4000 (Mink)",
  44         [APOLLO_DN4500-APOLLO_DN3000] = "DN4500 (Roadrunner)"
  45 };
  46
  47 int __init apollo_parse_bootinfo(const struct bi_record *record)
  48 {
  49         int unknown = 0;
  50         const void *data = record->data;
  51
  52         switch (be16_to_cpu(record->tag)) {
  53         case BI_APOLLO_MODEL:
  54                 apollo_model = be32_to_cpup(data);
  55                 break;
  56
  57         default:
  58                  unknown=1;
  59         }
  60
  61         return unknown;
  62 }
  63
  64 static void __init dn_setup_model(void)
  65 {
  66         pr_info("Apollo hardware found: [%s]\n",
  67                 apollo_models[apollo_model - APOLLO_DN3000]);
  68
  69         switch(apollo_model) {
  70                 case APOLLO_UNKNOWN:
  71                         panic("Unknown apollo model");
  72                         break;
  73                 case APOLLO_DN3000:
  74                 case APOLLO_DN3010:
  75                         sio01_physaddr=SAU8_SIO01_PHYSADDR;
  76                         rtc_physaddr=SAU8_RTC_PHYSADDR;
  77                         pica_physaddr=SAU8_PICA;
  78                         picb_physaddr=SAU8_PICB;
  79                         cpuctrl_physaddr=SAU8_CPUCTRL;
  80                         timer_physaddr=SAU8_TIMER;
  81                         break;
  82                 case APOLLO_DN4000:
  83                         sio01_physaddr=SAU7_SIO01_PHYSADDR;
  84                         sio23_physaddr=SAU7_SIO23_PHYSADDR;
  85                         rtc_physaddr=SAU7_RTC_PHYSADDR;
  86                         pica_physaddr=SAU7_PICA;
  87                         picb_physaddr=SAU7_PICB;
  88                         cpuctrl_physaddr=SAU7_CPUCTRL;
  89                         timer_physaddr=SAU7_TIMER;
  90                         break;
  91                 case APOLLO_DN4500:
  92                         panic("Apollo model not yet supported");
  93                         break;
  94                 case APOLLO_DN3500:
  95                         sio01_physaddr=SAU7_SIO01_PHYSADDR;
  96                         sio23_physaddr=SAU7_SIO23_PHYSADDR;
  97                         rtc_physaddr=SAU7_RTC_PHYSADDR;
  98                         pica_physaddr=SAU7_PICA;
  99                         picb_physaddr=SAU7_PICB;
 100                         cpuctrl_physaddr=SAU7_CPUCTRL;
 101                         timer_physaddr=SAU7_TIMER;
 102                         break;
 103                 default:
 104                         panic("Undefined apollo model");
 105                         break;
 106         }
 107
 108
 109 }
 110
 111 static void dn_serial_print(const char *str)
 112 {
 113     while (*str) {
 114         if (*str == '\n') {
 115             sio01.rhrb_thrb = (unsigned char)'\r';
 116             while (!(sio01.srb_csrb & 0x4))
 117                 ;
 118         }
 119         sio01.rhrb_thrb = (unsigned char)*str++;
 120         while (!(sio01.srb_csrb & 0x4))
 121             ;
 122     }
 123 }
 124
 125 void __init config_apollo(void)
 126 {
 127         int i;
 128
 129         dn_setup_model();
 130
 131         mach_sched_init=dn_sched_init; /* */
 132         mach_init_IRQ=dn_init_IRQ;
 133         mach_hwclk           = dn_dummy_hwclk; /* */
 134         mach_reset           = dn_dummy_reset;  /* */
 135 #ifdef CONFIG_HEARTBEAT
 136         mach_heartbeat = dn_heartbeat;
 137 #endif
 138         mach_get_model       = dn_get_model;
 139
 140         cpuctrl=0xaa00;
 141
 142         /* clear DMA translation table */
 143         for(i=0;i<0x400;i++)
 144                 addr_xlat_map[i]=0;
 145
 146 }
 147
 148 irqreturn_t dn_timer_int(int irq, void *dev_id)
 149 {
 150         unsigned char *at = (unsigned char *)apollo_timer;
 151
 152         legacy_timer_tick(1);
 153         timer_heartbeat();
 154
 155         READ_ONCE(*(at + 3));
 156         READ_ONCE(*(at + 5));
 157
 158         return IRQ_HANDLED;
 159 }
 160
 161 void dn_sched_init(void)
 162 {
 163         /* program timer 1 */
 164         *(volatile unsigned char *)(apollo_timer + 3) = 0x01;
 165         *(volatile unsigned char *)(apollo_timer + 1) = 0x40;
 166         *(volatile unsigned char *)(apollo_timer + 5) = 0x09;
 167         *(volatile unsigned char *)(apollo_timer + 7) = 0xc4;
 168
 169         /* enable IRQ of PIC B */
 170         *(volatile unsigned char *)(pica+1)&=(~8);
 171
 172 #if 0
 173         pr_info("*(0x10803) %02x\n",
 174                 *(volatile unsigned char *)(apollo_timer + 0x3));
 175         pr_info("*(0x10803) %02x\n",
 176                 *(volatile unsigned char *)(apollo_timer + 0x3));
 177 #endif
 178
 179         if (request_irq(IRQ_APOLLO, dn_timer_int, 0, "time", NULL))
 180                 pr_err("Couldn't register timer interrupt\n");
 181 }
 182
 183 int dn_dummy_hwclk(int op, struct rtc_time *t) {
 184
 185
 186   if(!op) { /* read */
 187     t->tm_sec=rtc->second;
 188     t->tm_min=rtc->minute;
 189     t->tm_hour=rtc->hours;
 190     t->tm_mday=rtc->day_of_month;
 191     t->tm_wday=rtc->day_of_week;
 192     t->tm_mon = rtc->month - 1;
 193     t->tm_year=rtc->year;
 194     if (t->tm_year < 70)
 195         t->tm_year += 100;
 196   } else {
 197     rtc->second=t->tm_sec;
 198     rtc->minute=t->tm_min;
 199     rtc->hours=t->tm_hour;
 200     rtc->day_of_month=t->tm_mday;
 201     if(t->tm_wday!=-1)
 202       rtc->day_of_week=t->tm_wday;
 203     rtc->month = t->tm_mon + 1;
 204     rtc->year = t->tm_year % 100;
 205   }
 206
 207   return 0;
 208
 209 }
 210
 211 static void dn_dummy_reset(void)
 212 {
 213   dn_serial_print("The end !\n");
 214
 215   for(;;);
 216
 217 }
 218
 219 static void dn_get_model(char *model)
 220 {
 221     strcpy(model, "Apollo ");
 222     if (apollo_model >= APOLLO_DN3000 && apollo_model <= APOLLO_DN4500)
 223         strcat(model, apollo_models[apollo_model - APOLLO_DN3000]);
 224 }
 225
 226 #ifdef CONFIG_HEARTBEAT
 227 static int dn_cpuctrl=0xff00;
 228
 229 static void dn_heartbeat(int on) {
 230
 231         if(on) {
 232                 dn_cpuctrl&=~0x100;
 233                 cpuctrl=dn_cpuctrl;
 234         }
 235         else {
 236                 dn_cpuctrl&=~0x100;
 237                 dn_cpuctrl|=0x100;
 238                 cpuctrl=dn_cpuctrl;
 239         }
 240 }
 241 #endif
 242