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/pgtable.h>
  17 #include <asm/apollohw.h>
  18 #include <asm/irq.h>
  19 #include <asm/machdep.h>
  20
  21 u_long sio01_physaddr;
  22 u_long sio23_physaddr;
  23 u_long rtc_physaddr;
  24 u_long pica_physaddr;
  25 u_long picb_physaddr;
  26 u_long cpuctrl_physaddr;
  27 u_long timer_physaddr;
  28 u_long apollo_model;
  29
  30 extern void dn_sched_init(irq_handler_t handler);
  31 extern void dn_init_IRQ(void);
  32 extern u32 dn_gettimeoffset(void);
  33 extern int dn_dummy_hwclk(int, struct rtc_time *);
  34 extern void dn_dummy_reset(void);
  35 #ifdef CONFIG_HEARTBEAT
  36 static void dn_heartbeat(int on);
  37 #endif
  38 static irqreturn_t dn_timer_int(int irq,void *);
  39 static void dn_get_model(char *model);
  40 static const char *apollo_models[] = {
  41         [APOLLO_DN3000-APOLLO_DN3000] = "DN3000 (Otter)",
  42         [APOLLO_DN3010-APOLLO_DN3000] = "DN3010 (Otter)",
  43         [APOLLO_DN3500-APOLLO_DN3000] = "DN3500 (Cougar II)",
  44         [APOLLO_DN4000-APOLLO_DN3000] = "DN4000 (Mink)",
  45         [APOLLO_DN4500-APOLLO_DN3000] = "DN4500 (Roadrunner)"
  46 };
  47
  48 int __init apollo_parse_bootinfo(const struct bi_record *record)
  49 {
  50         int unknown = 0;
  51         const void *data = record->data;
  52
  53         switch (be16_to_cpu(record->tag)) {
  54         case BI_APOLLO_MODEL:
  55                 apollo_model = be32_to_cpup(data);
  56                 break;
  57
  58         default:
  59                  unknown=1;
  60         }
  61
  62         return unknown;
  63 }
  64
  65 static void __init dn_setup_model(void)
  66 {
  67         pr_info("Apollo hardware found: [%s]\n",
  68                 apollo_models[apollo_model - APOLLO_DN3000]);
  69
  70         switch(apollo_model) {
  71                 case APOLLO_UNKNOWN:
  72                         panic("Unknown apollo model");
  73                         break;
  74                 case APOLLO_DN3000:
  75                 case APOLLO_DN3010:
  76                         sio01_physaddr=SAU8_SIO01_PHYSADDR;
  77                         rtc_physaddr=SAU8_RTC_PHYSADDR;
  78                         pica_physaddr=SAU8_PICA;
  79                         picb_physaddr=SAU8_PICB;
  80                         cpuctrl_physaddr=SAU8_CPUCTRL;
  81                         timer_physaddr=SAU8_TIMER;
  82                         break;
  83                 case APOLLO_DN4000:
  84                         sio01_physaddr=SAU7_SIO01_PHYSADDR;
  85                         sio23_physaddr=SAU7_SIO23_PHYSADDR;
  86                         rtc_physaddr=SAU7_RTC_PHYSADDR;
  87                         pica_physaddr=SAU7_PICA;
  88                         picb_physaddr=SAU7_PICB;
  89                         cpuctrl_physaddr=SAU7_CPUCTRL;
  90                         timer_physaddr=SAU7_TIMER;
  91                         break;
  92                 case APOLLO_DN4500:
  93                         panic("Apollo model not yet supported");
  94                         break;
  95                 case APOLLO_DN3500:
  96                         sio01_physaddr=SAU7_SIO01_PHYSADDR;
  97                         sio23_physaddr=SAU7_SIO23_PHYSADDR;
  98                         rtc_physaddr=SAU7_RTC_PHYSADDR;
  99                         pica_physaddr=SAU7_PICA;
 100                         picb_physaddr=SAU7_PICB;
 101                         cpuctrl_physaddr=SAU7_CPUCTRL;
 102                         timer_physaddr=SAU7_TIMER;
 103                         break;
 104                 default:
 105                         panic("Undefined apollo model");
 106                         break;
 107         }
 108
 109
 110 }
 111
 112 int dn_serial_console_wait_key(struct console *co) {
 113
 114         while(!(sio01.srb_csrb & 1))
 115                 barrier();
 116         return sio01.rhrb_thrb;
 117 }
 118
 119 void dn_serial_console_write (struct console *co, const char *str,unsigned int count)
 120 {
 121    while(count--) {
 122         if (*str == '\n') {
 123         sio01.rhrb_thrb = (unsigned char)'\r';
 124         while (!(sio01.srb_csrb & 0x4))
 125                 ;
 126         }
 127     sio01.rhrb_thrb = (unsigned char)*str++;
 128     while (!(sio01.srb_csrb & 0x4))
 129             ;
 130   }
 131 }
 132
 133 void dn_serial_print (const char *str)
 134 {
 135     while (*str) {
 136         if (*str == '\n') {
 137             sio01.rhrb_thrb = (unsigned char)'\r';
 138             while (!(sio01.srb_csrb & 0x4))
 139                 ;
 140         }
 141         sio01.rhrb_thrb = (unsigned char)*str++;
 142         while (!(sio01.srb_csrb & 0x4))
 143             ;
 144     }
 145 }
 146
 147 void __init config_apollo(void)
 148 {
 149         int i;
 150
 151         dn_setup_model();
 152
 153         mach_sched_init=dn_sched_init; /* */
 154         mach_init_IRQ=dn_init_IRQ;
 155         arch_gettimeoffset   = dn_gettimeoffset;
 156         mach_max_dma_address = 0xffffffff;
 157         mach_hwclk           = dn_dummy_hwclk; /* */
 158         mach_reset           = dn_dummy_reset;  /* */
 159 #ifdef CONFIG_HEARTBEAT
 160         mach_heartbeat = dn_heartbeat;
 161 #endif
 162         mach_get_model       = dn_get_model;
 163
 164         cpuctrl=0xaa00;
 165
 166         /* clear DMA translation table */
 167         for(i=0;i<0x400;i++)
 168                 addr_xlat_map[i]=0;
 169
 170 }
 171
 172 irqreturn_t dn_timer_int(int irq, void *dev_id)
 173 {
 174         irq_handler_t timer_handler = dev_id;
 175
 176         volatile unsigned char x;
 177
 178         timer_handler(irq, dev_id);
 179
 180         x = *(volatile unsigned char *)(apollo_timer + 3);
 181         x = *(volatile unsigned char *)(apollo_timer + 5);
 182
 183         return IRQ_HANDLED;
 184 }
 185
 186 void dn_sched_init(irq_handler_t timer_routine)
 187 {
 188         /* program timer 1 */
 189         *(volatile unsigned char *)(apollo_timer + 3) = 0x01;
 190         *(volatile unsigned char *)(apollo_timer + 1) = 0x40;
 191         *(volatile unsigned char *)(apollo_timer + 5) = 0x09;
 192         *(volatile unsigned char *)(apollo_timer + 7) = 0xc4;
 193
 194         /* enable IRQ of PIC B */
 195         *(volatile unsigned char *)(pica+1)&=(~8);
 196
 197 #if 0
 198         pr_info("*(0x10803) %02x\n",
 199                 *(volatile unsigned char *)(apollo_timer + 0x3));
 200         pr_info("*(0x10803) %02x\n",
 201                 *(volatile unsigned char *)(apollo_timer + 0x3));
 202 #endif
 203
 204         if (request_irq(IRQ_APOLLO, dn_timer_int, 0, "time", timer_routine))
 205                 pr_err("Couldn't register timer interrupt\n");
 206 }
 207
 208 u32 dn_gettimeoffset(void)
 209 {
 210         return 0xdeadbeef;
 211 }
 212
 213 int dn_dummy_hwclk(int op, struct rtc_time *t) {
 214
 215
 216   if(!op) { /* read */
 217     t->tm_sec=rtc->second;
 218     t->tm_min=rtc->minute;
 219     t->tm_hour=rtc->hours;
 220     t->tm_mday=rtc->day_of_month;
 221     t->tm_wday=rtc->day_of_week;
 222     t->tm_mon = rtc->month - 1;
 223     t->tm_year=rtc->year;
 224     if (t->tm_year < 70)
 225         t->tm_year += 100;
 226   } else {
 227     rtc->second=t->tm_sec;
 228     rtc->minute=t->tm_min;
 229     rtc->hours=t->tm_hour;
 230     rtc->day_of_month=t->tm_mday;
 231     if(t->tm_wday!=-1)
 232       rtc->day_of_week=t->tm_wday;
 233     rtc->month = t->tm_mon + 1;
 234     rtc->year = t->tm_year % 100;
 235   }
 236
 237   return 0;
 238
 239 }
 240
 241 void dn_dummy_reset(void) {
 242
 243   dn_serial_print("The end !\n");
 244
 245   for(;;);
 246
 247 }
 248
 249 void dn_dummy_waitbut(void) {
 250
 251   dn_serial_print("waitbut\n");
 252
 253 }
 254
 255 static void dn_get_model(char *model)
 256 {
 257     strcpy(model, "Apollo ");
 258     if (apollo_model >= APOLLO_DN3000 && apollo_model <= APOLLO_DN4500)
 259         strcat(model, apollo_models[apollo_model - APOLLO_DN3000]);
 260 }
 261
 262 #ifdef CONFIG_HEARTBEAT
 263 static int dn_cpuctrl=0xff00;
 264
 265 static void dn_heartbeat(int on) {
 266
 267         if(on) {
 268                 dn_cpuctrl&=~0x100;
 269                 cpuctrl=dn_cpuctrl;
 270         }
 271         else {
 272                 dn_cpuctrl&=~0x100;
 273                 dn_cpuctrl|=0x100;
 274                 cpuctrl=dn_cpuctrl;
 275         }
 276 }
 277 #endif
 278