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/console.h>
   8 #include <linux/rtc.h>
   9 #include <linux/vt_kern.h>
  10 #include <linux/interrupt.h>
  11
  12 #include <asm/setup.h>
  13 #include <asm/bootinfo.h>
  14 #include <asm/bootinfo-apollo.h>
  15 #include <asm/byteorder.h>
  16 #include <asm/apollohw.h>
  17 #include <asm/irq.h>
  18 #include <asm/machdep.h>
  19
  20 u_long sio01_physaddr;
  21 u_long sio23_physaddr;
  22 u_long rtc_physaddr;
  23 u_long pica_physaddr;
  24 u_long picb_physaddr;
  25 u_long cpuctrl_physaddr;
  26 u_long timer_physaddr;
  27 u_long apollo_model;
  28
  29 extern void dn_sched_init(irq_handler_t handler);
  30 extern void dn_init_IRQ(void);
  31 extern int dn_dummy_hwclk(int, struct rtc_time *);
  32 extern void dn_dummy_reset(void);
  33 #ifdef CONFIG_HEARTBEAT
  34 static void dn_heartbeat(int on);
  35 #endif
  36 static irqreturn_t dn_timer_int(int irq,void *);
  37 static void dn_get_model(char *model);
  38 static const char *apollo_models[] = {
  39         [APOLLO_DN3000-APOLLO_DN3000] = "DN3000 (Otter)",
  40         [APOLLO_DN3010-APOLLO_DN3000] = "DN3010 (Otter)",
  41         [APOLLO_DN3500-APOLLO_DN3000] = "DN3500 (Cougar II)",
  42         [APOLLO_DN4000-APOLLO_DN3000] = "DN4000 (Mink)",
  43         [APOLLO_DN4500-APOLLO_DN3000] = "DN4500 (Roadrunner)"
  44 };
  45
  46 int __init apollo_parse_bootinfo(const struct bi_record *record)
  47 {
  48         int unknown = 0;
  49         const void *data = record->data;
  50
  51         switch (be16_to_cpu(record->tag)) {
  52         case BI_APOLLO_MODEL:
  53                 apollo_model = be32_to_cpup(data);
  54                 break;
  55
  56         default:
  57                  unknown=1;
  58         }
  59
  60         return unknown;
  61 }
  62
  63 static void __init dn_setup_model(void)
  64 {
  65         pr_info("Apollo hardware found: [%s]\n",
  66                 apollo_models[apollo_model - APOLLO_DN3000]);
  67
  68         switch(apollo_model) {
  69                 case APOLLO_UNKNOWN:
  70                         panic("Unknown apollo model");
  71                         break;
  72                 case APOLLO_DN3000:
  73                 case APOLLO_DN3010:
  74                         sio01_physaddr=SAU8_SIO01_PHYSADDR;
  75                         rtc_physaddr=SAU8_RTC_PHYSADDR;
  76                         pica_physaddr=SAU8_PICA;
  77                         picb_physaddr=SAU8_PICB;
  78                         cpuctrl_physaddr=SAU8_CPUCTRL;
  79                         timer_physaddr=SAU8_TIMER;
  80                         break;
  81                 case APOLLO_DN4000:
  82                         sio01_physaddr=SAU7_SIO01_PHYSADDR;
  83                         sio23_physaddr=SAU7_SIO23_PHYSADDR;
  84                         rtc_physaddr=SAU7_RTC_PHYSADDR;
  85                         pica_physaddr=SAU7_PICA;
  86                         picb_physaddr=SAU7_PICB;
  87                         cpuctrl_physaddr=SAU7_CPUCTRL;
  88                         timer_physaddr=SAU7_TIMER;
  89                         break;
  90                 case APOLLO_DN4500:
  91                         panic("Apollo model not yet supported");
  92                         break;
  93                 case APOLLO_DN3500:
  94                         sio01_physaddr=SAU7_SIO01_PHYSADDR;
  95                         sio23_physaddr=SAU7_SIO23_PHYSADDR;
  96                         rtc_physaddr=SAU7_RTC_PHYSADDR;
  97                         pica_physaddr=SAU7_PICA;
  98                         picb_physaddr=SAU7_PICB;
  99                         cpuctrl_physaddr=SAU7_CPUCTRL;
 100                         timer_physaddr=SAU7_TIMER;
 101                         break;
 102                 default:
 103                         panic("Undefined apollo model");
 104                         break;
 105         }
 106
 107
 108 }
 109
 110 int dn_serial_console_wait_key(struct console *co) {
 111
 112         while(!(sio01.srb_csrb & 1))
 113                 barrier();
 114         return sio01.rhrb_thrb;
 115 }
 116
 117 void dn_serial_console_write (struct console *co, const char *str,unsigned int count)
 118 {
 119    while(count--) {
 120         if (*str == '\n') {
 121         sio01.rhrb_thrb = (unsigned char)'\r';
 122         while (!(sio01.srb_csrb & 0x4))
 123                 ;
 124         }
 125     sio01.rhrb_thrb = (unsigned char)*str++;
 126     while (!(sio01.srb_csrb & 0x4))
 127             ;
 128   }
 129 }
 130
 131 void dn_serial_print (const char *str)
 132 {
 133     while (*str) {
 134         if (*str == '\n') {
 135             sio01.rhrb_thrb = (unsigned char)'\r';
 136             while (!(sio01.srb_csrb & 0x4))
 137                 ;
 138         }
 139         sio01.rhrb_thrb = (unsigned char)*str++;
 140         while (!(sio01.srb_csrb & 0x4))
 141             ;
 142     }
 143 }
 144
 145 void __init config_apollo(void)
 146 {
 147         int i;
 148
 149         dn_setup_model();
 150
 151         mach_sched_init=dn_sched_init; /* */
 152         mach_init_IRQ=dn_init_IRQ;
 153         mach_hwclk           = dn_dummy_hwclk; /* */
 154         mach_reset           = dn_dummy_reset;  /* */
 155 #ifdef CONFIG_HEARTBEAT
 156         mach_heartbeat = dn_heartbeat;
 157 #endif
 158         mach_get_model       = dn_get_model;
 159
 160         cpuctrl=0xaa00;
 161
 162         /* clear DMA translation table */
 163         for(i=0;i<0x400;i++)
 164                 addr_xlat_map[i]=0;
 165
 166 }
 167
 168 irqreturn_t dn_timer_int(int irq, void *dev_id)
 169 {
 170         irq_handler_t timer_handler = dev_id;
 171
 172         volatile unsigned char x;
 173
 174         timer_handler(irq, dev_id);
 175
 176         x = *(volatile unsigned char *)(apollo_timer + 3);
 177         x = *(volatile unsigned char *)(apollo_timer + 5);
 178
 179         return IRQ_HANDLED;
 180 }
 181
 182 void dn_sched_init(irq_handler_t timer_routine)
 183 {
 184         /* program timer 1 */
 185         *(volatile unsigned char *)(apollo_timer + 3) = 0x01;
 186         *(volatile unsigned char *)(apollo_timer + 1) = 0x40;
 187         *(volatile unsigned char *)(apollo_timer + 5) = 0x09;
 188         *(volatile unsigned char *)(apollo_timer + 7) = 0xc4;
 189
 190         /* enable IRQ of PIC B */
 191         *(volatile unsigned char *)(pica+1)&=(~8);
 192
 193 #if 0
 194         pr_info("*(0x10803) %02x\n",
 195                 *(volatile unsigned char *)(apollo_timer + 0x3));
 196         pr_info("*(0x10803) %02x\n",
 197                 *(volatile unsigned char *)(apollo_timer + 0x3));
 198 #endif
 199
 200         if (request_irq(IRQ_APOLLO, dn_timer_int, 0, "time", timer_routine))
 201                 pr_err("Couldn't register timer interrupt\n");
 202 }
 203
 204 int dn_dummy_hwclk(int op, struct rtc_time *t) {
 205
 206
 207   if(!op) { /* read */
 208     t->tm_sec=rtc->second;
 209     t->tm_min=rtc->minute;
 210     t->tm_hour=rtc->hours;
 211     t->tm_mday=rtc->day_of_month;
 212     t->tm_wday=rtc->day_of_week;
 213     t->tm_mon = rtc->month - 1;
 214     t->tm_year=rtc->year;
 215     if (t->tm_year < 70)
 216         t->tm_year += 100;
 217   } else {
 218     rtc->second=t->tm_sec;
 219     rtc->minute=t->tm_min;
 220     rtc->hours=t->tm_hour;
 221     rtc->day_of_month=t->tm_mday;
 222     if(t->tm_wday!=-1)
 223       rtc->day_of_week=t->tm_wday;
 224     rtc->month = t->tm_mon + 1;
 225     rtc->year = t->tm_year % 100;
 226   }
 227
 228   return 0;
 229
 230 }
 231
 232 void dn_dummy_reset(void) {
 233
 234   dn_serial_print("The end !\n");
 235
 236   for(;;);
 237
 238 }
 239
 240 void dn_dummy_waitbut(void) {
 241
 242   dn_serial_print("waitbut\n");
 243
 244 }
 245
 246 static void dn_get_model(char *model)
 247 {
 248     strcpy(model, "Apollo ");
 249     if (apollo_model >= APOLLO_DN3000 && apollo_model <= APOLLO_DN4500)
 250         strcat(model, apollo_models[apollo_model - APOLLO_DN3000]);
 251 }
 252
 253 #ifdef CONFIG_HEARTBEAT
 254 static int dn_cpuctrl=0xff00;
 255
 256 static void dn_heartbeat(int on) {
 257
 258         if(on) {
 259                 dn_cpuctrl&=~0x100;
 260                 cpuctrl=dn_cpuctrl;
 261         }
 262         else {
 263                 dn_cpuctrl&=~0x100;
 264                 dn_cpuctrl|=0x100;
 265                 cpuctrl=dn_cpuctrl;
 266         }
 267 }
 268 #endif
 269